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Anti-pollution

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060 - Power plants

060272000 - INTERNAL COMBUSTION ENGINE WITH TREATMENT OR HANDLING OF EXHAUST GAS

060273000 - Methods

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DocumentTitleDate
20110173951METHOD AND DEVICE FOR THE PURIFICATION OF DIESEL EXHAUST GASES - The invention proposes a method for the purification of exhaust gases which are generated by a diesel engine with a charging turbine, and a special device for carrying out said method. The device comprises, in the flow direction of the exhaust gas, a dosing device for a reducing agent from a reducing agent reservoir (07-21-2011
20130042598REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION WITH GASKET ANTI-DEPOSIT SHIELDING STRUCTURE - A reductant delivery unit (02-21-2013
20130042597PASSIVE SCR CONTROL SYSTEM AND METHOD - A thermal management system includes an enable module, a status module and a temperature control module. The enable module enables generation of ammonia for use in selective catalytic reduction (SCR) catalysts of an exhaust system during a passive SCR mode. The status module determines whether the exhaust system is operating in a passive SCR mode and generates a passive SCR active signal. The passive SCR mode includes operating an engine with rich air/fuel ratios. The temperature control module activates electrical heating of an oxidation catalyst based on the passive SCR active signal and a temperature of the oxidation catalyst.02-21-2013
20120159933MODELING CATALYST EXOTHERM DUE TO BLOWTHROUGH - Modeling catalyst exotherm due to blowthrough is provided. The method of advantageously utilizes catalyst temperature based on an amount of blowthrough air and a combustion air-fuel ratio generating a catalyst exotherm.06-28-2012
20130074475EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve (03-28-2013
20130025261SYSTEM AND METHOD FOR CONTROLLING AMMONIA LEVELS IN A SELECTIVE CATALYTIC REDUCTION CATALYST USING A NITROGEN OXIDE SENSOR - A system according to the principles of the present disclosure includes an air/fuel ratio determination module and an emission level determination module. The air/fuel ratio determination module determines an air/fuel ratio based on input from an air/fuel ratio sensor positioned downstream from a three-way catalyst that is positioned upstream from a selective catalytic reduction (SCR) catalyst. The emission level determination module selects one of a predetermined value and an input based on the air/fuel ratio. The input is received from a nitrogen oxide sensor positioned downstream from the three-way catalyst. The emission level determination module determines an ammonia level based on the one of the predetermined value and the input received from the nitrogen oxide sensor.01-31-2013
20100050599Method and Device for Addition of a Reducing Agent in an Exhaust Gas Line of an Internal Combustion Engine of a Motor Vehicle - The invention relates to a method and a device for the addition of a reducing agent in an exhaust gas line of an internal combustion engine of a motor vehicle, with at least one NO03-04-2010
20120167553EXHAUST AFTERTREATMENT SYSTEMS THAT INCLUDE AN AMMONIA-SCR CATALYST PROMOTED WITH AN OXYGEN STORAGE MATERIAL - A low-oxygen content exhaust flow produced by an engine that is combusting, on average, a stoichiometric mixture of air and fuel generally contains various unwanted gaseous emissions. The exhaust flow is treated by an exhaust aftertreatment system that includes a three-way-catalyst (TWC) and an ammonia-selective catalytic reduction (ammonia-SCR) catalyst positioned downstream from the TWC in a flow direction of the exhaust flow. The ammonia-SCR catalyst includes (1) a base metal ion-substituted zeolite and/or a base metal ion-substituted silicoaluminophosphate and (2) an oxygen storage material selected from the group consisting of a metal oxide or a mixed metal oxide that exhibits oxygen storage and release capacity. The serial arrangement of the TWC and the ammonia-SCR catalyst enhances the conversion of NO07-05-2012
20090193790Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine - A method for regenerating a soot-laden particle filter in the exhaust gas train of a diesel engine in a vehicle, wherein the engine is equipped with a fuel injection system having an injection valve for each cylinder and an exhaust braking device including a butterfly valve in the exhaust gas train upstream of the particle filter. An exhaust braking phase is initiated by closing the butterfly valve, thereby causing hot exhaust gas to be compressed upstream of the butterfly valve. Regeneration of the particle filter is then initiated by injecting diesel fuel into the cylinders substantially after the respective pistons pass top dead center, and allowing the hot exhaust gas mixture containing unburned fuel and air to flow past the butterfly valve so that the mixture ignites the soot and then supports combustion of the soot, thereby regenerating the particle filter.08-06-2009
20110185706METHOD FOR MANAGING THE REGENERATION OF A DIESEL PARTICULATE FILTER (DPF) IN A DIESEL ENGINE SYSTEM - A method is provided for managing the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system. The engine having an intake and an exhaust line and being configured to after-inject or post-inject quantities of fuel into a combustion chamber for raising the temperature of the engine exhaust gas. The engine including in the exhaust line, but not limited to, a Diesel Particulate Filter (DPF). The method including, but not limited to identifying a faulty condition of the engine system and, in case that such faulty condition is not critical, measuring the intake air charge and, in case such intake air charge is acceptable, and performing a regeneration process for said Diesel Particulate Filter (DPF).08-04-2011
20110192142FILTRATION DEVICE FOR EXHAUST GASES - The filtration device (08-11-2011
20110192141EXHAUST SYSTEM COMPONENT HAVING A COMBINATION OF A HEAT EXCHANGER AND A CATALYTIC CONVERTER, MOTOR VEHICLE HAVING THE COMPONENT AND METHOD OF OPERATING THE COMPONENT - A component of an exhaust gas system for an internal combustion engine includes at least one housing with an inlet and an outlet for an exhaust gas and at least one inflow and one outflow for a medium. The component has a heat exchanger around which the exhaust gas can flow. The heat exchanger has a first thermal mass and a catalytic converter body through which the exhaust gas can flow. The catalytic converter body has a second thermal mass. A motor vehicle having a component and a method for operating a component, are also provided.08-11-2011
20110192139HYDROGEN COMBUSTION SYSTEM WITH CLOSED-CYCLE RECYCLING OF EXHAUST GAS AND METHOD THEREOF - Disclosed is a hydrogen combustion system with closed-cycle recycling comprising a hydrogen combustion system with closed-cycle recycling of exhaust gas, comprising: a hydrogen supplier 110 which supply hydrogen used as a fuel, a combustion chamber 120 which is located in the engine 130 and connected to the hydrogen supplying pipe 111 in which the hydrogen is combusted, a condenser 140 which converts the hot exhaust gas emitted through the discharge pipe 121 installed on the outlet of the combustion chamber 120 into the cold exhaust gas and condensed water, and a recycling pipe 150 which performs recycling of a part of the cold exhaust gas from the condenser 140 to the inlet of the combustion chamber 120.08-11-2011
20130074476Method for Operating a Particle Filter - A method for operating a particle filter that filters particles contained in the exhaust of motor vehicle combustion engines. A conditioning step is performed such that the separation efficiency of the particle filter for particles is increased relative to the value existing in the new condition.03-28-2013
20130074474ENGINE OFF NH3 BASED SELECTIVE CATALYTIC REDUCTION NOX ADSORBER - An exhaust treatment system for an engine includes a selective catalyst reduction (SCR) treatment module that controls a valve and an air pump to deliver air to an SCR catalyst in response to the engine turning off. An SCR loading module controls the valve and the air pump to deliver air to an exhaust manifold and controls a dosing system to deliver a dosing agent upstream of the SCR catalyst when a temperature of the SCR catalyst is less than a temperature threshold and the SCR catalyst is not saturated with ammonia.03-28-2013
20120174564SYSTEM FOR AN ENGINE HAVING A PARTICULATE MATTER SENSOR - A system for improving operation of an engine having a particulate matter sensor is presented. The system may be used to improve engine operation during cold starts especially under conditions where water vapor or entrained water droplets are present in vehicle exhaust gases. In one embodiment, an engine controller that activates a heater of an exhaust gas sensor after an output of a particulate matter sensor exceeds a threshold value after an engine is started.07-12-2012
20120174563Device and Method for Regulating the Injection of a Quantity of Reducer in the Gaseous Phase - The invention relates to a device (07-12-2012
20120174562EXHAUST GAS PURIFICATION APPARATUS AND EXHAUST GAS PURIFICATION METHOD FOR AN INTERNAL COMBUSTION ENGINE - A detection unit that is arranged in an exhaust passage of an internal combustion engine configured to detect a state of the exhaust gas, addition unit configured to add the additive agent into the exhaust passage, a catalyst that is arranged at the downstream side of the detection unit and the addition unit so as to receive a supply of the additive agent from the addition unit, determination unit configured to determine whether detection accuracy of the detection unit drops due to the additive agent to be added from the addition unit, and stop unit configured to stop detection of the state of the exhaust gas by the detection unit in cases where it is determined by the determination unit that the detection accuracy of the detection unit drops.07-12-2012
20120174561Reductant delivery device - Various diffusion apparatuses are provided for facilitating the injection of a nitrogen-oxides reductant solution, such as urea, into exhaust gas as part of a selective catalytic reduction system. These diffusion apparatuses direct exhaust gas from an exhaust pipe, through a conduit, and into a diffusion chamber where urea is injected. The flow of exhaust gas through the conduit provides improved transport of injected reductant solution into the exhaust pipe, and adhesion of the reductant solution to the walls of the diffusion chamber is reduced.07-12-2012
20130031893Temp-A-Start Regeneration System - A regeneration module is usable in conjunction with a diesel engine to control the operation of a regeneration cycle of the diesel engine. During the regeneration cycle, particulate matter collected in or on a diesel particulate filter of the diesel engine is removed to improve the operation of the diesel particulate filter. In various embodiments, the regeneration module is connected to a remote operator such that the regeneration cycle is activated during desirable idle periods of the diesel engine as determined by the controller.02-07-2013
20130074473TRIGGER ACTIVATED ADJUSTABLE PULSE WIDTH GENERATOR CIRCUIT FOR AUTOMOTIVE EXHAUST AFTER-TREATMENT AND INJECTION - A method adjusts a pulse width of a signal. The method provides a fixed voltage input trigger pulse (03-28-2013
20130074477ON-BOARD DIAGNOSTIC METHOD FOR NO2 FORMATION IN AN OXIDATION CATALYST - The capacity of a platinum-containing diesel oxidation catalyst (DOC) to simultaneously convert NO to NO03-28-2013
20130031892EXHAUST GAS PURIFICATION DEVICE AND CONTROL METHOD FOR EXHAUST GAS PURIFICATION DEVICE - An exhaust gas purification device 02-07-2013
20130031889METHOD OF TREATING EMISSIONS OF A HYBRID VEHICLE WITH A HYDROCARBON ABSORBER AND A CATALYST BYPASS SYSTEM - A method of treating emissions from an internal combustion engine of a hybrid vehicle includes directing a flow of air created by the internal combustion engine when the internal combustion engine is spinning but not being fueled through a hydrocarbon absorber to collect hydrocarbons within the flow of air. When the hydrocarbon absorber is full and unable to collect additional hydrocarbons, the flow of air is directed through an electrically heated catalyst to treat the flow of air and remove the hydrocarbons. When the hydrocarbon absorber is not full and able to collect additional hydrocarbons, the flow of air is directed through a bypass path that bypasses the electrically heated catalyst to conserve the thermal energy stored within the electrically heated catalyst.02-07-2013
20130031890Reductant Injection Control System - A control system for reducing nitrogen oxides in an engine exhaust of an engine includes an emissions catalyst having an inlet adapted to receive an exhaust from the engine. A reductant tank stores a reductant. An injector is in fluid communication with the reductant tank and is operable to inject the reductant into the exhaust upstream of the catalyst. A reductant pump pumps the reductant from the reductant tank to the injector. A controller determines a target pressure of the reductant based on an engine operating condition and operates the reductant pump based on the target pressure.02-07-2013
20100043399REDUCTANT INJECTION RATE SHAPING METHOD FOR REGENERATION OF AFTERTREATMENT SYSTEMS - The invention provides methods for regenerating pollutant storage and catalytic components of an internal combustion engine's exhaust gas aftertreatment system. These methods include introducing reductant in to catalytic components requiring regeneration in series of discreet portions during a Scheduled Regeneration Event. Typically the flow of exhaust gas to the catalytic component undergoing regeneration is at least partially reduced.02-25-2010
20130031891NH3 EMISSIONS MANAGEMENT IN A NOX REDUCTION SYSTEM - A system includes an internal combustion engine producing an exhaust gas, an aftertreatment system receiving the exhaust gas, the aftertreatment system including a particulate filter positioned upstream of an SCR catalyst component, and a urea injector operatively coupled to the aftertreatment system at a position upstream of the SCR catalyst component. The system further includes a controller that interprets an exhaust temperature value, an ambient temperature value, and a urea injection amount. The controller determines a urea deposit amount in response to the exhaust temperature value, the ambient temperature value, and the urea injection amount, and initiates a desoot regeneration event in response to the urea deposit amount. The desoot regeneration event includes operating the engine at a urea decomposition exhaust temperature.02-07-2013
20090158706VARIABLE ENGINE OUT EMISSION CONTROL ROADMAP - A method for operating an internal combustion engine for variable engine out NOx control talking into account the age of the SCR.06-25-2009
20100107605PASSIVE AMMONIA-SELECTIVE CATALYTIC REDUCTION FOR NOx CONTROL IN INTERNAL COMBUSTION ENGINES - Engine exhaust gas feedstream NOx emissions aftertreatment includes a catalytic device connected upstream of an ammonia-selective catalytic reduction device including a base metal. Engine operation can be modulated to generate an engine-out exhaust gas feedstream that converts to ammonia on the catalytic device. The ammonia is stored on the ammonia-selective catalytic reduction device, and used to reduce NOx emissions in the exhaust gas feedstream.05-06-2010
20100107604AMMONIA GENERATOR, VEHICLE AND METHOD FOR GENERATING AMMONIA - The invention relates to an ammonia generator (05-06-2010
20100107606PASSIVE AMMONIA-SELECTIVE CATALYTIC REDUCTION FOR NOx CONTROL IN INTERNAL COMBUSTION ENGINES - Engine exhaust gas feedstream NOx emissions aftertreatment includes a catalytic device and first and second ammonia selective catalytic reduction devices. The first and second ammonia-selective catalytic reduction devices each includes a base metal. Engine operation can be modulated to generate an engine-out exhaust gas feedstream that converts to ammonia. The ammonia is stored on the first and second ammonia selective catalytic reduction devices and used to reduce NOx emissions in the exhaust gas feedstream.05-06-2010
20100107607METHOD AND DEVICE FOR PRODUCING AMMONIA FOR THE EXHAUST GAS TREATMENT IN INTERNAL COMBUSTION ENGINES IN A MOTOR VEHICLE - A method for producing ammonia for treating exhaust gas in internal combustion engines in a motor vehicle proposes that the internal combustion engine is operated with an air/fuel ratio λ<1.0, and water is added to the air/fuel mixture supplied to the internal combustion engine in order to produce the ammonia required for treating the exhaust gas on board the vehicle. And in a device for implementing the method with a means for determining the air/fuel ratio λ of the air/fuel mixture supplied to the internal combustion engine, it is proposed that an addition means for adding water to the air/fuel mixture be provided in order to produce the ammonia required for exhaust gas treatment on board the motor vehicle, the addition means being controllable depending on the determined air/fuel ratio λ.05-06-2010
20100024392METHOD FOR HEATING A CATALYTIC CONVERTER ARRANGED IN AN EXHAUST-GAS REGION OF A COMBUSTION PROCESS, AND DEVICE FOR CARRYING OUT THE METHOD - An internal combustion engine is operated with direct fuel injection into the combustion chambers. Furthermore, the internal combustion engine is operated with sub-optimum ignition angle efficiency and an apportionment of a fuel quantity, which is to be injected before the start of a combustion, into at least two partial injections. A torque loss which results from the sub-optimum ignition angle efficiency and/or from the apportionment of the fuel to be injected is compensated by means of an increased charge of the combustion chambers. The fuel quantity and the charge are coordinated with one another in such a way that the air ratio lambda of the combustion chamber charges is greater than 1. The method is characterized in that a measure for a temperature of the catalytic converter, in particular a measure for the temperature at the inlet of the catalytic converter, is determined and in that a quantity of reducing exhaust-gas constituents is increased by means of at least one intervention into the control of the internal combustion engine if the measure for the temperature exceeds a predetermined temperature threshold value. The approach according to the invention permits rapid heating of the catalytic converter, wherein the hydrocarbon emissions when the catalytic converter is cold are at the same time as low as possible.02-04-2010
20090260346METHOD FOR PURIFICATION OF AN EXHAUST GAS FROM A DIESEL ENGINE - A method for removing impurities in exhaust gas from a diesel engine, where the impurities comprise nitrogen oxides, carbon monoxide, particulate matter and incompletely combusted hydrocarbons. The method comprises the steps of injection of a reductant comprising urea or ammonia into the exhaust gas from the engine, selective catalytic reduction of the nitrogen oxides in the exhaust gas by the reductant, and intermittent injection of a hydrocarbon into this effluent. The succeeding steps are oxidation of carbon monoxide, particulate matter, incompletely combusted hydrocarbons and injected hydrocarbon to carbon dioxide and water, and in selectively oxidising possible excess of reductant to free nitrogen, and finally filtration of the effluent by passing the gas through a catalysed filter. The remaining particulate matter is retained in the filter, and the carbon monoxide, particulate matter and hydrocarbons are oxidixed to carbon dioxide and water, and the reductant is selectively oxidixed to nitrogen, creating a purified exhaust gas.10-22-2009
20120180456EXHAUST GAS TREATMENT METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE - An object is to prevent a large quantity of unburned HC components from being released to the outside until a diesel oxidation catalyst reaches an activation temperature after early post-injection. In the present invention, by reducing a throttle opening of a variable throttle mechanism 07-19-2012
20120180455METHOD FOR DIAGNOSING AN EXHAUST GAS POST-TREATMENT - Method for the on-board diagnosis of an exhaust gas post-treatment device for a combustion engine, wherein the exhaust gas post-treatment device has means for converting an exhaust gas component and wherein sensor means are provided downstream of the exhaust gas post-treatment device, wherein the exhaust gas component is acquired by the sensor means and that by means of the quantity of the acquired exhaust gas component the quality of the means for converting the exhaust gas component is derived, wherein a signal of the sensor means is transmitted to a system for the on-board diagnosis.07-19-2012
20120180454METHOD FOR CONTROLLING THE REGENERATION PROCESS IN LNT DEVICES - A method is provided for controlling the regeneration process of a LNT device for the treatment of exhaust produced by an internal combustion engine. The method includes, but is not limited to storing a plurality of parameters in the form of preset values which relate to admissible regenerating conditions, receiving a regeneration request, measuring the current values of the parameters to define the current operating conditions of the engine and the LNT device, comparing the current values with the preset values of a corresponding parameter to evaluate if the current operating conditions of the engine and of the LNT device satisfy the admissible regenerating conditions for carrying out the regeneration process, and inhibiting the regeneration process if at least one current value of a corresponding parameter does not satisfy the admissible regenerating conditions for carrying out the regeneration process.07-19-2012
20120180453SULFUR-TOLERANT PEROVSKITE NOx OXIDATION CATALYSTS - A method for catalytic oxidation of NO to NO07-19-2012
20130086888EXHAUST GAS PROCESSING DEVICE - An exhaust gas treatment method having a particulate matter (PM) sensor on which a part of PM exhausted from a diesel particulate filter (DPF) may be attached and that generates a signal, may include determining a sensor trap PM model amount that may be trapped on the PM sensor in a condition that the diesel particulate filter may be operated normal according to an engine driving condition and a variation thereof, determining a sensor trap PM real amount that may be attached on the PM sensor by using the signal that may be generated from the PM sensor, and determining a condition of the diesel particulate filter by comparing the sensor trap PM model amount and the sensor trap PM real amount.04-11-2013
20130047586EXHAUST CATALYST PRE-HEATING SYSTEM AND METHOD - A system and method according to which exhaust is directed from a stationary exhaust source and through a burner, and a combustible fluid is vented from at least one combustible fluid source other than the stationary exhaust source. The combustible fluid is captured and directed to flow from the combustible fluid source and towards the burner, and at least air is mixed the captured combustible fluid to form a mixture. The mixture is introduced into the burner and burned therein to thereby pre-heat the exhaust flowing therethrough. The pre-heated exhaust contacts a catalyst.02-28-2013
20130047585METHOD FOR PREVENTING CHOKING OF UREA INJECTION NOZZLE ON SCR SYSTEM - A method for preventing choking of a urea injection nozzle in after run operation on a SCR system which supplies urea stored in a urea tank through a supply module, a urea injection nozzle and a urea line connecting the supply module and the urea injection nozzle, the method for preventing choking of a urea injection nozzle includes comparing pressure within the supply module with a first predetermined pressure (Pa), open controlling the urea injection nozzle when the pressure in the supply module is higher than the first predetermined pressure (Pa) or repeating open/close controlling the urea injection nozzle when the pressure in the supply module is lower than the first predetermined pressure (Pa), pressure equilibrium which recovers pressure in the supply module and stopping the after run operation when the balancing pressure is completed.02-28-2013
20130047581Reagent Dosing System - A method of injecting a reagent into a stream of exhaust output from an engine to change the composition of the exhaust includes obtaining a target reagent injection rate. A calculation period is set to a time greater than one second. The target injection rate is multiplied by the time of the calculation period to determine an amount of reagent to be injected during the calculation period. An injection duty cycle is set. An injection duration is determined to inject the determined amount of reagent based on the injection duty cycle. The reagent is injected at the duty cycle for the injection duration.02-28-2013
20130047582CONTROL APPARATUS FOR TEMPERATURE EXCURSIONS WITHIN AN EXHAUST GAS TREATMENT SYSTEM - An exhaust gas treatment system for an internal combustion engine comprises a particulate filter assembly configured to receive exhaust gas from the engine. The particulate filter assembly comprises an electrically heated catalyst, a particulate filter disposed downstream of the electrically heated catalyst, a hydrocarbon injector, in fluid communication with the exhaust gas, upstream of the electrically heated catalyst and configured to inject excess hydrocarbon into the exhaust gas, an air pump in fluid communication with the exhaust gas upstream of the electrically heated catalyst and configured to deliver air to the exhaust gas to increase the volumetric gas flow rate through, and to decrease the heat residence time in, the particulate filter and a controller configured to operate the hydrocarbon injector, the electrically heated catalyst and the air pump based on predetermined exhaust gas flow rates, temperature thresholds and particulate loadings within the particulate filter.02-28-2013
20130086889METHOD AND DEVICE PERTAINING TO LIMITING THE TEMPERATURE OF A HC DOSING UNIT IN AN EXHAUST SYSTEM - A method pertaining to an HC dosing system for cleaning of exhaust gases from an engine (04-11-2013
20130086887Method For Reducing The Rate Of Exhaust Heat Loss - Disclosed is a method for reducing the rate of exhaust heat loss. The method comprises the steps of determining whether an engine is motoring and determining whether a diesel particulate filter needs to be regenerated. Further, the method comprises the step of closing an air throttle to a substantially closed position for reducing the flow of intake gas into the engine if the diesel particulate filter needs to be regenerated and if the engine is motoring. Further yet, the method comprises the step of opening the EGR valve to an at least partially open position for allowing the exhaust gas to recirculate through the engine if the diesel particulate filter needs to be regenerated and if the engine is motoring.04-11-2013
20130086886ELECTRICALLY HEATED OXIDATION CATALYST PARTICULATE MATTER PROTECTION - A control method for a heating device of an oxidation catalyst is provided. The control method includes: estimating an accumulation of particulate matter on the heating device; and selectively controlling a switching device in electrical communication with the heating device based on the estimated accumulation.04-11-2013
20090308052METHODS OF INCREASING ACCURACY OF SOOT LOAD ESTIMATES - A method for improving the effectiveness of filters by increasing accuracy of an estimate of particulate matter loading remaining in the filter after cleaning. In one embodiment, the disclosed method includes removing soot from the DPF by cleaning, and measuring parameters for a set of predetermined criteria. The amount of soot present in the DPF is then estimated based on delta pressure. The resulting estimated soot load value accounts for the noise factors such as ash loading after extended operation. The value is then used to adjust for future measurements of soot loading in the DPF after subsequent regeneration treatments and/or used to diagnose the effectiveness of the cleaning. The method can also be applied to diagnostics of the DPF. When discrepancies between DPSLE and model-based soot load estimate are observed in healthy regenerations, failure modes such as plugged filter, extreme ash loading or substrate melting can be detected.12-17-2009
20120216510Vehicle-Based Strategy for Removing Urea Deposits from an SCR Catalyst - A method is provided for controlling regeneration of an SCR catalyst. The method includes coordinating the regeneration duration and temperature (e.g., longer/shorter regenerations and/or lower/higher temperatures) to the urea deposit loading. In this way, improved regeneration may be achieved due to the particular nature of urea deposits on SCR catalysts.08-30-2012
20120216509SYSTEM AND METHOD OF DPF PASSIVE ENHANCEMENT THROUGH POWERTRAIN TORQUE-SPEED MANAGEMENT - This disclosure provides a method and system for determining recommendations for vehicle operation that reduce soot production in view of a diesel particulate filter (DPF) of an exhaust aftertreatment system. Recommendations generated can reduce excessive particulate matter (PM) production during transient engine events and provide for operating conditions favorable for passive regeneration. In this way, less frequent active regeneration of the DPF is needed and/or more opportunities are provided for passive regeneration. The system and method can utilize location and terrain information to anticipate and project a window of operation in view of reducing soot production and soot loading of the DPF, or provide the operator with instruction when such opportunities are present or will soon be encountered.08-30-2012
20120216508EMISSION CONTROL - Hydrocarbon traps used to trap then release unburned hydrocarbons upon startup of a spark ignition internal combustion engine are sensitive to degradation if exposed to normal temperature exhaust gases. On board diagnostics of HC traps are provided by the invention, by incorporating a heat sensitive oxygen storage material in the HC trap material, and using conventional determination of OSC efficiency to determine if the HC trap material has been exposed to excessive temperature.08-30-2012
20120216507METHOD FOR DETERMINING SOOT MASS STORED WITH A PARTICULATE FILTER - A method for determining soot mass oxidized during a particulate filter oxidation procedure is disclosed. In one example, soot mass is determined via an Arrhenius equation. The approach may provide cost savings and reliability improvements as compared to other ways of determining soot mass.08-30-2012
20130055699SYSTEM FOR RECYCLING CAPTURED AGGLOMERATED DIESEL SOOT AND RELATED METHOD - A method of recycling captured agglomerated soot captured by and collected from a diesel emission control after-treatment (DECAT) system, the method comprising collecting captured agglomerated diesel soot (CADS) as a feedstock, loading the CADS into a controlled thermochemical conversion (TCC) process reactor, employing time-phased heat and pressure in the controlled TCC process reactor until the CADS sufficiently decompose to reclaim solids, liquid fuels and gases, piping pyrolysis oils (tars) and vapors produced in the controlled TCC process reactor to chambers, cooling and condensing the pyrolysis oils and vapors into a liquid form, and recirculating a pyrolysis gas produced in the controlled TCC process reactor for use as a source of heat and power.03-07-2013
20130067891EXHAUST AFTERTREATMENT SYSTEM - An exhaust aftertreatment system including a housing with two or more inlets configured to receive separate entering exhaust streams from an engine. The system may include two or more first exhaust treatment devices, each configured to receive one of the separate entering exhaust streams in a first direction. The system may further include two or more redirecting flow passages configured to combine the separate exhaust streams into a merged exhaust stream that flows in a second direction about 180 degrees from the first direction and an intermediate flow region configured to divide the merged exhaust stream into two or more separate exiting exhaust streams. The system also may also includes two or more second exhaust treatment devices, each configured to receive one of the separate exiting exhaust streams in a third direction about 90 degrees from the second direction.03-21-2013
20130067889PRESSURE REGULATION VIA PUMP CONTROL FOR EXHAUST SYSTEM - A control system for a pump in a vehicle exhaust system includes a pump having an inlet port and an outlet port, a fluid supply in fluid communication with the inlet port, and a supply line in fluid communication with the outlet port. The supply line is configured to deliver fluid to an exhaust component. A controller is configured to adjust pump flow rate to maintain a desired pressure in the supply line. A restriction is utilized in a return flow path from the supply line.03-21-2013
20130067890METHOD OF OPTIMIZING OPERATING COSTS OF AN INTERNAL COMBUSTION ENGINE - A method to optimize operation of a diesel fuel engine having at least one aftertreatment device to reduce NOx is provided. An electronic control unit for a diesel engine with an aftertreatment device for the reduction of NOx is also provided. The method and the control unit optimize a quantity of fuel to be injected into an aftertreatment device based upon inputs relating to the cost of diesel fuel and the cost of diesel exhaust fluid.03-21-2013
20120102922METHOD OF SIZING A HEATING CORE OF AN EXHAUST HEATER FOR AN EXHAUST TREATMENT SYSTEM OF A VEHICLE - A method of sizing a heating core of an exhaust heater for an exhaust gas treatment system includes measuring the cumulative hydrocarbon or carbon monoxide emissions from the exhaust gas for multiple volumetric sizes of the heating core when heated in accordance with a heating strategy. Alternatively, a model of the treatment system may be used to predict the cumulative hydrocarbon or carbon monoxide emissions. The method further includes selecting the volumetric size of the heating core that is associated with the lowest cumulative hydrocarbon or carbon monoxide emissions level from the measured or predicted hydrocarbon or carbon monoxide emissions when the exhaust gas is heated in accordance with the heating strategy. The heating strategy may include pre-crank heating, or a combination of pre-crank heating and post-crank heating.05-03-2012
20100089032EXHAUST EMISSION PURIFICATION METHOD AND EXHAUST EMISSION PURIFICATION SYSTEM - In case of emergency regeneration, i.e. any one of forced regeneration after a judgment is made that purification is insufficient in purification judgment after ending forced regeneration, forced regeneration after time has expired before completing of forced regeneration, or forced regeneration when the pressure difference across a DPF exceeds a predetermined first judging pressure difference under a state where traveling distance of a vehicle is shorter than a predetermined distance for judgment an alarm for urging manual regeneration is issued, and wherein when manual regeneration is designated thereafter manual regeneration is performed and when predetermined conditions are satisfied without the reception of a designation of manual regeneration, automatic regeneration is performed. In forced regeneration of the DPF for purifying PM in exhaust gas, forced regeneration is performed surely even if manual regeneration is not selected at the time of emergency regeneration, and convenience is enhanced by reducing burden on a driver.04-15-2010
20120222404METHOD FOR CONTROLLING POLLUTANT EMISSIONS FROM A COMBUSTION ENGINE - The invention relates to a method for controlling a system for treating NOx in an exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent into the exhaust line upstream of an NOx reduction catalyst. The invention is characterised in that it consists in estimating the efficiency of the treatment in relation to a maximum conversion potential obtained if the ratio between the quantity of injected reducer and the quantity of NOx in the gas complies with a given set value and if the mass of reducing agent stored in the catalyst complies with a given storage set value.09-06-2012
20120222403COMBUSTION SYSTEM AND METHOD FOR CLEANING A CATALYTIC CONVERTER INSTALLED IN AN EXHAUST DUCT OF A COMBUSTION SYSTEM - In order to achieve effective cleaning of an inlet side of a catalytic converter in a combustion system, in particular a large-scale internal combustion engine system, a cleaning device having a cleaning brush for mechanically removing deposits is provided on the inlet side. The cleaning brush effectively and reliably removes and swirls up the deposits which have been formed, which are carried away with the exhaust gas in the flow direction through the catalytic converter.09-06-2012
20120222402METHOD FOR DIAGNOSING EXHAUST GAS PROBES AND/OR CATALYTIC CONVERTERS - New operating phases of internal combustion engines, such as coasting in which the internal combustion engine is decoupled from the rest of the drive section, continuously decrease the number of phases in which there is an overrun mode of an internal combustion engine in which diagnoses of catalytic converters and exhaust gas probes are carried out. Also, a method wherein the diagnosis of the at least one exhaust gas probe and/or the at least one catalytic converter carried out during the coasting mode and, in particular, when the cylinder bank is switched off.09-06-2012
20120222401METHOD FOR OPERATING AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for operating an exhaust system of an internal combustion engine, wherein nitrogen oxide (NO09-06-2012
20120222400METHODS AND SYSTEMS FOR EMISSIONS CONTROL IN A DUAL FUEL ENGINE - Various methods and systems are provided for an engine with an exhaust gas treatment system. In one example, under a first condition, a first fuel is delivered for combustion in the engine. Under a second condition, a second fuel is delivered for combustion in the engine, the second fuel different than the first fuel. Under a third condition, the first fuel is delivered as a reductant for the exhaust gas treatment system.09-06-2012
20120222399OXIDATION CATALYST BURN THRESHOLD ADJUSTMENT TO AVOID QUENCHING - A method of controlling an exhaust gas treatment system for an engine includes relating the usage of an oxidation catalyst to a temperature offset value, and increasing a current burn threshold temperature by the temperature offset value to define an adjusted burn threshold temperature. Hydrocarbons may be injected into a flow of exhaust gas when the temperature of the oxidation catalyst is equal to or greater than the adjusted burn threshold temperature. The temperature at which the hydrocarbons are injected into the exhaust gas is thereby increased to accommodate performance degradation in the oxidation catalyst, which extends the life of the oxidation catalyst.09-06-2012
20130213010Electric Heating Assisted Passive and Active Regeneration for Efficient Emission Controls of Diesel Engines - A method of heating an exhaust gas in an exhaust aftertreatment system including a Diesel Oxidation Catalyst (DOC) and a diesel particulate filter (DPF) is provided. The method includes heating the exhaust gas to a predetermined temperature to increase NO08-22-2013
20110011060Exhaust Cooling Module for SCR Catalysts - An exhaust aftertreatment system having a NO01-20-2011
20110011059EXHAUST GAS TREATING APPARATUS AND TREATING METHOD - An exhaust gas treating apparatus includes an adsorption tower (01-20-2011
20130061573SYSTEM FOR PURIFYING EXHAUST GAS AND METHOD FOR CONTROLLING THE SAME - An exhaust gas purification device may deactivate at least one of cylinders to supply a gasoline particulate filter with sufficient air according to a driving condition of a gasoline engine, and a control method thereof and a control method thereof may include comparing a pressure difference of the gasoline particulate filter with a predetermined value, determining a cylinder that may be to be deactivated when the pressure difference may be larger than the predetermined value, regenerating the gasoline particulate filter by supplying it with air through the deactivated cylinder, determining whether the engine may be in an over-run condition during the regeneration process, and returning to a general driving condition in a case that the engine may be in the over-run condition.03-14-2013
20120227380HYDROCARBON CONVERSION DIAGNOSTIC - A system includes an engine configured to operate in a first operating state and a second operating state, a particulate filter configured to receive exhaust gas from the engine and filter particulate matter from the exhaust gas, and an oxidation catalyst configured to generate heat to increase a temperature of the exhaust gas during a regeneration process. A sensor is configured to measure an actual temperature of the exhaust gas during the regeneration process. A controller is configured to define a fuel conversion factor based, at least in part, on the actual temperature and an expected temperature of the exhaust gas. The controller is further configured to analyze the fuel conversion factor over time relative to at least one of the first and second operating states of the engine and diagnose a fault in the regeneration process based, at least in part, on the fuel conversion factor.09-13-2012
20130160429LIMITING NOX EMISSIONS - A method for controlling an internal combustion engine limits emission of undesirable compounds of nitrogen and oxygen and provides increased transient power.06-27-2013
20120233986SYSTEM AND METHOD TO CONTROL SELECTIVE CATALYTIC REDUCTION SYSTEMS IN FEEDBACK - A method includes determining a current mid-bed NH09-20-2012
20120233984METHOD AND SYSTEM FOR CONTROLLING A NITROGEN OXIDE (NOX) CONVERSION EFFICIENCY MONITOR - A vehicle includes an engine, an exhaust system, a selective catalytic reduction (SCR) device, a first and a second NOx sensor configured to respectively measure an upstream and a downstream NOx level, and a controller or host machine. The controller, via the present method, calculates a NOx conversion efficiency rate of the SCR device using the NOx levels from the sensors. At the end of a key cycle when an accumulated amount of upstream NOx is less than a calibrated upstream NOx level, the controller determines if the NOx conversion efficiency rate is presently passing or failing. The accumulated upstream NOx is recorded in memory for use in calculating the NOx conversion efficiency rate during a subsequent key cycle only when the NOx conversion efficiency rate is presently passing at the end of the key cycle. A control system for the vehicle uses the controller and sensors as noted above.09-20-2012
20080295487Method and Device for Operating an Internal Combustion Engine - An internal combustion engine has a plurality of cylinders and an exhaust tract into which a mixture which is situated in the respective cylinder is introduced in the respective discharge strokes. A combustion misfire rate is determined as a function of at least one operating variable of the internal combustion engine. A temperature in the exhaust tract is determined as a function of the combustion misfire rate.12-04-2008
20080295484Method and system for maintaining aftertreatment efficiency - A method is provided for compensating for factors affecting particulate matter accumulation within an aftertreatment element of an engine exhaust system. The method comprises determining rate of change of flow resistance through the aftertreatment element with time. Regeneration is periodically initiated to reduce particulate matter accumulation within the aftertreatment element. Rate of change of flow resistance through the aftertreatment element over time is correlated with at least a model of particulate matter accumulation within the aftertreatment element and a model of regeneration frequency of the aftertreatment element, based on predetermined values for particulate matter accumulation and regeneration frequency. Action, at least including increasing regeneration frequency, is initiated to compensate for an increased rate of particulate matter accumulation in the aftertreatment element.12-04-2008
20080295483Method and system for maintaining aftertreatment efficiency - A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.12-04-2008
20130160430SYSTEM AND METHOD OF CONTROLLING MAXIMUM HYDROCARBON INJECTION FOR DIESEL PARTICULATE FILTER REGENERATION - A method of providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter within an exhaust system of a diesel engine. A mass flow rate of exhaust gas within an exhaust system is determined. A mass flow rate of oxygen within the exhaust gas entering the diesel oxidation catalyst is determined. A set point indicative of an allowable mass flow rate of oxygen within the exhaust gas exiting the diesel oxidation catalyst is received. A hydrocarbon threshold that may be injected into the exhaust system is calculated. Hydrocarbons are injected into the exhaust system upstream of the diesel oxidation catalyst, wherein the injected hydrocarbons do not exceed the calculated threshold amount of hydrocarbons.06-27-2013
20130160431METHOD FOR WARMING AFTER-TREATMENT BURNER SYSTEM - Disclosed is a method for warming an after-treatment system in which a burner 06-27-2013
20120000183METHOD FOR INJECTING AMMONIA INTO AN EXHAUST GAS STREAM01-05-2012
20110113752Method for Operating an Exhaust Gas Treatment System Having an SCR Catalytic Converter - In a system with an SCR catalytic converter, a correction by a changeable long term adaption factor to a target dosing rate is provided for the model dosing rate and a correction by a changeable short term adaption factor to an assumed actual filling state for the ammonia filling level value. A dosing unit controllable by a control unit adds an ammonia-containing reducing agent to the exhaust gas and n exhaust gas enriched with ammonia according to the dosing is fed to the SCR catalytic converter. An ammonia filling level value for a filling level of ammonia stored in the SCR catalytic converter and a model dosing rate for dosing the reducing agent into the exhaust gas are calculated by a computer model.05-19-2011
20080209885SCAVENGING PHOSPHORUS, SULFUR, AND LEAD FROM COMBUSTION EXHAUST USING TUNGSTEN COMPOUNDS AND LUBRICANT - The present invention relates to an apparatus and method for delivering tungsten into a fuel combustion system or to the exhaust therefrom. By the present invention, tungsten from the lubricant or the fuel will interact with combustion products and, in particular, phosphorus, sulfur, and/or lead from the combustion products. In this manner, the tungsten scavenges or inactivates harmful materials which have migrated into the fuel or combustion products, and which can otherwise poison catalytic converters, sensors and/or automotive on-board diagnostic devices. The present invention can also lead to improved durability of exhaust after treatment systems. A lubricant in accordance with the present invention is also disclosed09-04-2008
20110126514Systems and Methods for On-Site Mixing and Dispensing of a Reducing Agent Solution for Use with a Diesel Catalytic Converter - Systems and methods for mixing and dispensing an aqueous urea solution at the point of delivery to diesel powered vehicles. A stand alone terminal or modular unit that mixes and dispenses the dilute solution on an as-needed batch basis. Each delivery terminal includes a dry or concentrated liquid urea reservoir, and a metering urea dispenser, along with a parallel demineralized water reservoir and a metering water dispenser. The demineralized water may be provided directly from an external source or the system may include a demineralizing component. The metered dispensing of the urea and the water into a mixing tank to produce the aqueous urea solution (AUS) is controlled through an electronic control system. From the mixing tank the system directs the solution through a sediment filtration system before retaining the mixed and filtered solution in a terminal holding and dispensing tank.06-02-2011
20090320449Pt-Pd Diesel Oxidation Catalyst with CO/HC Light-off and HC Storage Function - The present invention is directed to a diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx). More particularly, the present invention is directed to a novel washcoat composition comprising two distinct washcoat layers containing two distinctly different ratios of Pt:Pd.12-31-2009
20100269488Particulate trap system and method - A particulate trap system for an exhaust system of an internal combustion engine includes a monolithic wall-flow particulate trap having a plurality of contiguous porous walls, and a remotely actuated relief valve downstream of said trap for periodically creating a reverse pressure throughout the exhaust system upstream of the relief valve and including said trap. A reversing apparatus periodically creates a reverse pressure drop across a portion of the contiguous porous walls of said trap to dislodge accumulated particulate and cause a portion of the filtered exhaust gas to flow back through said portion of the contiguous porous walls to remove particulate therefrom. A control system actuates the relief valve and the reversing apparatus. In one embodiment the system is utilized on a vehicle and the reversing apparatus includes a relief valve that is also operative as an exhaust break. Regeneration includes the steps of: creating a backpressure in the entire exhaust system from a location downstream of the trap; creating a reverse pressure drop across only a portion of the porous walls to dislodge accumulated particulate therefrom; and causing a portion of filtered exhaust gas to flow back through said portion of the porous walls to carry the dislodged particulate out of the trap.10-28-2010
20110283683Composition and Method for Controlling Excessive Exhaust Gas Temperatures - A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system is disclosed. The method includes an approach for reducing thermal damage to aftertreatment devices in an exhaust system by reducing excessive exhaust gas temperatures created during particulate filter regeneration.11-24-2011
20110283679PARTICULATE FILTER SYSTEM HAVING A VARIABLE DEGREE OF SEPARATION - A method for the operation of a particulate filter system for an internal combustion engine wherein an. An exhaust gas stream enters a housing via a gas inlet opening. The housing receives a particulate filter, the stream flows into crude gas ducts connected to the gas inlet opening, and the stream can flow out of the particulate filter via clean gas ducts that are in fluid connection with a gas outlet opening, and are separated from the crude gas ducts. The crude gas ducts are connected to a connecting space in the direction of flow, and the connecting space has an exhaust port controlled by a closing mechanism. According to the invention, a method for operating an open particulate filter system is provided, by which the degree of separation of the soot particles from the exhaust gas can be increased. This is achieved in that a partial exhaust gas stream of the exhaust gas stream can be discharged via the exhaust port into the environment, just as the primary exhaust gas flow can be discharged into the environment via the gas outlet opening, according at least to a particulate load thereof.11-24-2011
20110283678METHOD FOR CONTROLLING INJECTION OF DIESEL EXHAUST FLUID INTO AN EXHAUST PIPE OF AN INTERNAL COMBUSTION ENGINE - A method is provided for controlling injection of Diesel Exhaust Fluid into an exhaust pipe of an internal combustion engine equipped with a Selective Reduction Catalyst. The method includes, but is not limited to monitoring a value of a control parameter influencing an operation of the Selective Reduction Catalyst, injecting a quantity of Diesel Exhaust Fluid, controlling the quantity of Diesel Exhaust Fluid to be injected employing a closed loop procedure or an open loop procedure, switching between the closed loop procedure and the open loop procedure, when value of the control parameter crosses a first threshold value of the control parameter.11-24-2011
20110277450REGULATING STRATEGY FOR A CATALYTIC CONVERTER CONCEPT FOR EXHAUST-GAS AFTERTREATMENT HAVING A PLURALITY OF NITROGEN OXIDE STORAGE CATALYTIC CONVERTERS - The present invention relates to a regulating strategy for a special catalytic converter for exhaust-gas aftertreatment. The catalytic converter concept is distinguished in that at least two nitrogen oxide storage catalytic converters are used in the exhaust section of a vehicle. The first, possibly close-coupled unit is followed by one or more nitrogen oxide storage catalytic converters, which are possibly situated in the underbody of the vehicle. The nitrogen oxide storage catalytic converters are then regenerated as a function of the exceedance of nitrogen oxide threshold vales downstream thereof.11-17-2011
20110126513Exhaust Purification System for Internal Combustion Engine and Desulfurization Method for the Same - An exhaust purification system for an internal combustion engine, and a desulfurization method for the same, recovers purification performance of a denitrification catalyst by removing sulfur poisoned at the denitrification catalyst in an exhaust system. The exhaust purification system may include an exhaust pipe through which an exhaust gas flows, the exhaust gas being generated at the internal combustion engine having a first injector injecting a fuel to a combustion chamber, a second injector mounted at the exhaust pipe and additionally injecting the fuel, a particulate filter mounted at the exhaust pipe downstream of the second injector and filtering particulate matters (PM) in the exhaust gas, a denitrification catalyst mounted at the exhaust pipe downstream of the particulate filter and reducing nitrogen oxide contained in the exhaust gas, and a control portion performing desulfurization of the denitrification catalyst when a desulfurization entering condition and a desulfurization condition are satisfied during regenerating the particulate filter.06-02-2011
20110296816ON-BOARD VEHICLE DIAGNOSTIC OF AN OXIDATION CATALYST - There is presented a method for monitoring an oxidation catalyst in an exhaust line of an internal combustion engine, wherein a catalyst diagnostic event comprises a test cycle during which a conversion capability of the oxidation catalyst is determined based on the exotherm generated by post-injection of fuel. The diagnostic event may only be initiated when the temperature of the oxidation catalyst lies within a predetermined temperature range.12-08-2011
20110283677EXHAUST GAS POSTTREATMENT DEVICE FOR AN INTERNAL COMBUSTION ENGINE - The invention relates to an exhaust gas after-treatment device and a method, having a storage container and a buffer reservoir, both of which can be heated. In this manner it is possible to significantly reduce the energy requirement for providing gaseous ammonia for an exhaust gas after-treatment device of an internal combustion engine.11-24-2011
20110314794DIESEL ENGINE SYSTEM AND METHOD AND APPARATUS FOR HANDLING DIESEL ENGINE EXHAUST - A diesel engine system includes a diesel engine, a NOx control device downstream of the engine, an exhaust line between the engine and the NOx control device, a bypass line connected to the exhaust line at a first end upstream of the NOx control device, and a bypass valve connecting the exhaust line and the bypass line, the bypass valve permitting flow through the exhaust line to the NOx control device when in an open position and preventing flow through the exhaust line to the NOx control device and permitting flow through the exhaust line to the bypass line when in a closed position. A controller can arranged to control opening and dosing of the bypass valve, such as when an operating condition of the engine reaches a predetermined operating condition.12-29-2011
20110314793SYSTEM AND METHOD FOR DETERMINING AN AGE OF AND CONTROLLING A SELECTIVE CATALYTIC REDUCTION CATALYST - An exhaust treatment system for exhaust gas produced by an engine includes a condition control module, a load determination module, and an age determination module. The condition control module decreases a load on a selective catalytic reduction (SCR) catalyst below a predetermined load threshold and increases exhaust gas temperature (EGT) to a predetermined temperature. The load determination module increases injection of a dosing agent into the exhaust gas and determines a load on the SCR catalyst when dosing agent is detected downstream from the SCR catalyst. The age determination module determines an age of the SCR catalyst based the determined load and predetermined loads for first and second SCR catalysts, respectively.12-29-2011
20110271656CONTROL SYSTEM AND METHOD FOR PREVENTING HYDROCARBON SLIP DURING PARTICULATE MATTER FILTER REGENERATION - An engine control system includes an injection determination module and an injection regulation module. The injection determination module determines a desired rate of hydrocarbon (HC) injection into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection regulation module increases a rate of HC injection from a first rate to the desired rate during a predetermined period before regeneration of the PM filter, wherein the predetermined period is based on a difference between a predetermined temperature and a temperature at an outlet of an oxidation catalyst (OC).11-10-2011
20110271658NITROGEN OXIDE STORAGE CATALYTIC CONVERTER FOR USE IN A MOTOR VEHICLE IN A CLOSE-COUPLED POSITION - The use of nitrogen oxide storage catalysts in a close-coupled position for the cleaning of the exhaust gases from gasoline engines with direct gasoline injection which are operated with a predominantly lean air/fuel mixture places particular demands on the thermal stability and aging stability of the catalysts to be used.11-10-2011
20120006003METHOD OF OPERATING A VEHICLE UNDER FROZEN DIESEL EMISSION FLUID CONDITIONS - A method of controlling a vehicle includes determining if a diesel emission fluid is at least partially frozen, and determining if the vehicle is currently operating in a low diesel emission fluid inducement protocol. If the vehicle is not currently operating in the low diesel emission fluid inducement protocol, and the diesel emission fluid is at least partially frozen, then a temporary minimum diesel emission fluid mass may be defined to prevent entry of the vehicle into the low diesel emission fluid inducement protocol.01-12-2012
20110283680METHOD FOR PURIFICATION OF EXHAUST GAS FROM A DIESEL ENGINE - The invention provides a method for purification of exhaust gas from a diesel engine in a system, which comprises a device for selective catalytic reduction and a diesel particulate filter preferably at least partially covered by a catalytic layer installed downstream of the device for selective catalytic reduction. A device for catalytic oxidation is installed upstream of the device for selective catalytic reduction and/or between the device for selective catalytic reduction and the diesel particulate filter. A device for injection of a controlled amount of reductant is installed inlet of the device for selective catalytic reduction, and a device for injection of a controlled amount of hydrocarbon is installed inlet of the catalytic oxidation.11-24-2011
20110283681METHOD FOR OPERATING COMPONENTS FOR EXHAUST GAS AFTER-TREATMENT AND EXHAUST GAS AFTER-TREATMENT APPARATUS - A method of operating components for exhaust gas after-treatment disposed in the exhaust gas tract of a turbocharged internal combustion engine. A partial exhaust gas stream is removed from the main exhaust gas stream upstream of at least one exhaust gas turbine. The partial exhaust gas stream is fed back into the main exhaust gas stream downstream of the at least one exhaust gas turbine. The feed is located, in terms of exhaust flow, between an NO oxidation catalytic converter and a particle filter (i.e., the exhaust gas after-treatment component). That is, the at least one exhaust gas after-treatment component is arranged downstream of the feed. The quantity of exhaust gas branched off as a partial exhaust gas stream is controlled or closed-loop controlled as a function of at least one target temperature in at least one defined point in the exhaust gas tract, in particular in the partial exhaust gas stream and/or of the at least one exhaust gas after-treatment component.11-24-2011
20110289902METHOD FOR OPERATING AN EXHAUST VALVE FOR DIESEL PARTICULATE FILTER REGENERATION - A method of operating an exhaust valve (12-01-2011
20110289901Carbon dioxide sequestration in freshly mixed concrete using the exhaust from the concrete truck - A process for sequestering carbon dioxide in fresh concrete from the exhaust emitted from the combustion of carbonaceous fuel in a concrete mixing truck is disclosed. In the process, exhaust from the engine containing carbon dioxide is redirected after passing through the required environmental controls to the concrete mixing chamber on the concrete truck. This carbon dioxide is allowed to physically mix with the ingredients producing fresh concrete. When the concrete is made from cementitious material which include calcium oxide, then the carbon dioxide may chemically bind with the calcium to form calcium carbonate and be permanently sequestered in the concrete product.12-01-2011
20110277449HYBRID CATALYST RADIANT PREHEATING SYSTEM - A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first active volume of a catalyst assembly in an exhaust system of an engine and (ii) a first temperature of a non-EHC of the catalyst assembly. The mode selection module is configured to select a non-EHC radiant heating mode and generate a mode signal based on the at least one of the first active catalyst volume and the first temperature. An EHC control module increases temperature of the EHC to an elevated temperature that is greater than a stabilization temperature based on the mode signal. The stabilization temperature is greater than a catalyst light off temperature.11-17-2011
20100186374Method for Heating an SCR System using Resistive Heating Elements - Method for heating a urea SCR system using at least two resistive heating elements (R07-29-2010
20090288392Engine system having particulate reduction device and method - An internal combustion engine system includes an engine having an engine housing. The engine system further includes an exhaust system, and a turbine disposed within the exhaust system. A particulate reduction device is disposed in the exhaust system upstream of the turbine. The particulate reduction device includes an exhaust retarder having a flow property which is based at least in part on a residence requirement for combustion of particulates in exhaust gases passing therethrough. The flow property may be a flow restriction property, and the exhaust retarder may include a flow restricting trapping element configured to trap particulates in the exhaust gases. The flow restricting trapping element defines a combustion efficacy to exhaust mass flow and temperature coefficient for the particulate reduction device which is based at least in part on a combustion initiating residence requirement for particulates passing through the particulate reduction device.11-26-2009
20110258983RECONFIGURABLE MIXER FOR AN EXHAUST AFTERTREATMENT SYSTEM AND METHOD OF USING THE SAME - A mixer for an exhaust aftertreatment system, such as a diesel engine exhaust aftertreatment system, is disclosed. The mixer includes a body portion that is configured to be disposed in an exhaust conduit upstream of an exhaust aftertreatment device and an airfoil portion that is disposed on the body portion and reversibly movable between a deployed position and a retracted position, wherein in the deployed position the airfoil portion provides a deployed resistance to an exhaust gas flow and in the retracted position provides a retracted resistance, and the deployed resistance is greater than the retracted resistance. The mixer preferably comprises a two-way shape memory alloy, particularly a high temperature, oxidation resistant shape memory alloy. An exhaust aftertreatment system employing the mixer is also disclosed, as well as a method of using the same.10-27-2011
20080307771Cold start white smoke aftertreatment protection - A method for cold start white smoke protection of a hydrocarbon after treatment device, and method of engine operation to effect the same. The method comprises a) determining the temperature of the hydrocarbon after-treatment device during cold start conditions; b) determining hydrocarbon emissions in the hydrocarbon after-treatment device; and c) modifying engine operating conditions to raise the hydrocarbon after-treatment temperature at a pre-determined rate to a temperature sufficient to permit controlled oxidation of the hydrocarbons in the hydrocarbon after treatment device.12-18-2008
20110214413CONFIGURATION AND METHOD FOR CLEANING AN EXHAUST GAS FLOW OF AN INTERNAL COMBUSTION ENGINE BY SEPARATING PARTICLES AND MOTOR VEHICLE HAVING THE CONFIGURATION - A configuration for purifying or cleaning an exhaust-gas flow of an internal combustion engine includes at least an ionization device, an agglomeration device, and a (catalytically active) radial honeycomb body around a duct. The exhaust-gas is diverted from the duct into the radial honeycomb body, while the agglomerated particles are caught in a particle separator of the duct. A method for purifying or cleaning an exhaust-gas flow of an internal combustion engine and a motor vehicle including an exhaust system having the configuration, are also provided.09-08-2011
20100101210Method for Regenerating Soot Filters in the Exhaust Gas System of a Lean Mix Engine, and Exhaust Gas System Therefor - To adhere to legal exhaust-gas regulations, the exhaust gases of a lean-burn engine must be freed from soot particles and nitrogen oxides. It is proposed that the cylinders of the lean-burn engine be divided into two groups which discharge their exhaust gases into two associated exhaust lines which each comprise a soot filter and which are merged at an opening-in point into a common exhaust line. The common exhaust line comprises the catalytic converter for the removal of the nitrogen oxides. By regenerating the two soot filters at different times, the exhaust-gas temperature in the common exhaust line is limited to a mean temperature between the exhaust-gas temperature of normal operation and that of regeneration operation, and the catalytic converter for the removal of the nitrogen oxides is preserved.04-29-2010
20100101212EXHAUST GAS PURIFYING METHOD - A method of purifying an exhaust gas, includes: disposing a NOx trapping catalyst in an exhaust pipe of an internal combustion engine, the NOx trapping catalyst including: a metal substrate including cells, a corner portion of each of cells having an acute angle; and a catalyst layer supported in the metal substrate and including a noble metal, a heat-resistant inorganic oxide and a NOx trapping material, the catalyst layer having pores formed by addition of a pore formation promoting material, and the NOx trapping catalyst: adsorbing NOx in the exhaust gas when an exhaust air-fuel ratio is in a lean state; and desorbing and reducing the adsorbed NOx when the exhaust air-fuel ratio is in a stoichiometric state or a rich state; and removing the NOx by the exhaust air-fuel ratio being shifted between the lean state and the rich state.04-29-2010
20120186235EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - In order to regenerate an NOx trap catalyst 07-26-2012
20120096838ARRANGEMENT AND METHOD FOR TREATMENT OF EXAHUST GASES - An exhaust gas treatment arrangement and a method thereof is contemplated for treating exhaust gases flowing along a flow path in an exhaust pipe system. The arrangement comprises a supply element being in communication with a source comprising an ammonia gas. The supply element comprises at least two discharge apertures being adapted to communicate with the flow path such that the ammonia gas may be dispersible from the discharge apertures into the exhaust gases in the flow path in at least two discharge directions.04-26-2012
20120096837METHOD FOR ADAPTING AN SCR CATALYTIC CONVERTER IN AN EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a kinetic model of a SCR is described. In one example, the kinetic model is adapted for stored ammonia, ammonia release rate, and ammonia storage capacity. The method may be useful for adjusting engine control parameters for the purpose of reducing engine emissions.04-26-2012
20120096836METHOD OF MONITORING POLLUTANT EMISSIONS OF A COMBUSTION ENGINE - The invention relates to a method for monitoring the pollutant emissions of a combustion engine comprising at least one piston, the translatable movement of which defines a combustion chamber, said engine being combined with an exhaust line that, in the direction of exhaust gas flow, comprises an oxidation catalyst, an NOx reduction catalyst, and a particle filter, the method being characterized by the use of a fuel comprising an additive assisting in soot combustion when re-refined by the particle filter, and according to at least one operating mode of the engine, the fuel is injected in accordance with a calibration minimizing carbon dioxide discharges by the engine.04-26-2012
20120096835FEEDFORWARD SELECTIVE CATALYTIC REDUCTION SYSTEM FOR TURBINE ENGINES - A system and method of treating an exhaust flow including nitrogen oxides (NOx) in a turbine engine power generation plant is provided. The turbine engine has a selective catalytic reduction system having a catalyst. During steady state operation of the engine, a reducing agent, such as ammonia, is supplied to an injector in an amount based on a measured molar flow of NOx in the exhaust flow. During a disturbance in the operation of the turbine engine, a reducing agent is supplied to the injector in an amount based on a predicted molar flow of NOx in the exhaust flow. In addition, the system can include a biasing feature in which additional reducing agent is supplied to the exhaust flow beyond the predicted molar flow of NOx. The system and method can mitigate NOx during transient engine operation, an operational mode in which emissions are difficult to predict and control.04-26-2012
20120096834OPTIMIZED ELECTRICALLY HEATED EXHAUST GAS TREATMENT SYSTEM - A method of sizing a light-off core supporting a fixed quantity of a light-off catalyst for an exhaust gas treatment system having an electric heater upstream of the light-off catalyst for heating the exhaust gas includes measuring the cumulative hydrocarbon or carbon monoxide emissions leaving the exhaust gas treatment system for multiple volumetric sizes of the light-off core in accordance with a heating strategy. Alternatively, a model of the treatment system may be used to predict the cumulative hydrocarbon or carbon monoxide emissions. The method further includes selecting the volumetric size of the light-off core that is associated with the lowest cumulative hydrocarbon or carbon monoxide emissions level from the measured or predicted hydrocarbon or carbon monoxide emissions when the exhaust gas is heated in accordance with the heating strategy. The heating strategy may include pre-crank heating, post-crank heating, or a combination of pre-crank heating and post crank heating.04-26-2012
20110258984START-STOP HYBRID EXOTHERMIC CATALYST HEATING SYSTEM - A catalyst heating system includes a first monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The first monitoring module monitors at least one of (i) a first temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and at least one of a fuel enrichment mode and a secondary air injection mode based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to one of the first catalyst and a second catalyst of the catalyst assembly based on the mode signal.10-27-2011
20120060474Exhaust Cooler - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust.03-15-2012
20110167797PREVENTING CATALYST DAMAGE DURING MISFIRE EVENT - A control system includes a temperature determination module and a catalyst protection module. The temperature determination module determines a temperature of exhaust gas based on a resistance of a heating element of an oxygen sensor. The catalyst protection module adjusts an operating parameter of an engine to decrease the temperature of the exhaust gas when the temperature of the exhaust gas is greater than a threshold temperature. The threshold temperature is based on a temperature that damages a catalyst in an exhaust system.07-14-2011
20100037591Method and Device for Purifying an Exhaust Gas Flow of a Lean-Burning Internal Combustion Engine - A method and device for purifying an exhaust gas flow of a lean-burning internal combustion engine, with a particle filter which stores particles both in rich and lean operation of the internal combustion engine and which has at least one catalytically active component on which in lean operation of the internal combustion engine defined exhaust gas components, in particular carbon monoxides and/or hydrocarbons are oxidized, the particle filter furthermore having at least one catalytically active component on which in rich operation of the internal combustion engine defined nitrogen oxides are converted into ammonia using hydrogen present in the exhaust gas flow, the ammonia being temporarily stored in at least one SCR catalytic converter which is connected downstream to the particle filter in the exhaust gas flow direction, and the SCR catalytic converter having at least one catalytically active component on which in lean operation of the internal combustion engine defined nitrogen oxides are reduced using the ammonia which has been temporarily stored in the SCR catalytic converter by selective catalytic reduction (SCR).02-18-2010
20100122520System for Controlling Urea Injection Quantity of Vehicle and Method Thereof - In a vehicle that is equipped with a selective catalytic reduction (SCR) device, the ammonia consumption amount is accurately predicted in the SCR catalytic convertor based on the ammonia amount consumed by NOx, and the absorbed ammonia amount is controlled to improve the purification performance of the NOx and responsiveness to a rapid variation of driving conditions such that the purification efficiency is enhanced. A method for controlling the urea injection amount of a vehicle may include calculating an entire consumption amount of ammonia that is necessary in an SCR catalytic convertor by applying an ammonia amount consumed by the NOx exhaust amount, an absorbed ammonia amount, an ammonia reaction ratio, an absorbed HC amount, and an deterioration, calculating a necessary urea amount by calculating a necessary ammonia amount corresponding to the calculated entire ammonia consumption amount, and injecting the necessary urea amount when the temperature of the SCR catalytic convertor is in a predetermined range.05-20-2010
20120023910Particulate Filter Regeneration Control System and Method - Systems and methods for controlling regeneration of a diesel particulate filter in a vehicle engine exhaust include detecting a distance of an object from the exhaust and controlling a regeneration event if the distance is less than a threshold value. The system and method may include a particulate filter disposed in the exhaust of the vehicle and a proximity sensor disposed adjacent an exhaust opening and positioned to detect presence of an object near the opening. A controller in communication with the proximity sensor is adapted for controlling regeneration of the particulate filter in response to the proximity sensor detecting the object near the opening.02-02-2012
20120023909METHODS AND SYSTEMS FOR AN ENGINE EMISSION CONTROL SYSTEM - Systems and methods are provided for a layered emission control device coupled to an exhaust manifold. Various formulations may be incorporated in a plurality of layers of the device to enable various emission control functions to be grouped within spatial constraints. The layers may be organized to reduce functional interference and improve functional synergy between the various emission control functions.02-02-2012
20120023908Method for diagnosing an exhaust gas sensor and device for carrying out the method - A method is described for diagnosing an exhaust gas sensor which is situated in the exhaust gas area of an internal combustion engine for the purpose of detecting at least one exhaust gas component, which is heated with the aid of a sensor heater and whose temperature is detected. A device for carrying out the method is also described. The exhaust gas sensor is heated to a diagnosis starting temperature which is higher than the exhaust gas temperature; the heat output of the sensor heater is reduced or the sensor heater is completely turned off at least to the extent that the sensor temperature is able to decrease; the decreasing sensor temperature is detected; a measure for the temperature drop in relation to time is ascertained; this measure is compared with a first temperature gradient threshold value; and an error signal is provided if the temperature drop is too slow and therefore the ascertained measure for the temperature drop in relation to time does not exceed the first temperature gradient threshold value.02-02-2012
20120023907SYSTEM AND METHOD FOR PROCESSING NH3 SLIPPAGE OF A SELECTIVE CATALYST REDUCTION SYSTEM - Systems and methods for storing NH02-02-2012
20120023906SYSTEM AND APPARATUS FOR ENHANCING EXHAUST AFTERTREATMENT STARTUP EMISSIONS CONTROL - An aftertreatment system including a method which provides a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an engine; determines that an ammonia pre-load condition for the SCR catalyst is present; determines a first amount of ammonia pre-load in response to the ammonia pre-load condition; injects an amount of ammonia or urea into the exhaust stream in response to the first amount of ammonia; and adsorbs a second amount of ammonia onto the SCR catalyst in response to injecting an amount of ammonia or urea, where the second amount of ammonia is either the injected amount of ammonia or an amount of ammonia resulting from hydrolysis from the injected amount of urea.02-02-2012
20120023905SYSTEM, METHOD, AND APPARATUS TO ENGAGE ALTERNATE REDUCTANT IN A NOX REDUCTION SYSTEM - An exhaust aftertreatment process including providing a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an internal combustion engine; determining that a temperature of the exhaust stream is not within an NH02-02-2012
20120023904EXHAUST GAS POST PROCESSING SYSTEM AND CONTROL METHOD THEREOF - An exhaust gas post processing method, may include detecting driving conditions of an engine, determining a ratio of soluble organic matter and carbon particles trapped in a diesel particulate filter according to the detected driving conditions, selecting a first predetermined temperature and a first maintain time for eliminating the soluble organic matter according to the ratio of the soluble organic matter and the carbon particles, and controlling a temperature of the diesel particulate filter according thereto, and eliminating the soluble organic matter by sustaining the first predetermined temperature for the first maintain time, selecting a second predetermined temperature for eliminating the carbon particles, and controlling a temperature of the diesel particulate filter according thereto.02-02-2012
20120023903APPARATUS AND METHOD FOR MONITORING REGENERATION FREQUENCY OF A VEHICLE PARTICULATE FILTER - A vehicle includes an engine, a regenerable exhaust stream particulate filter, and a host machine. The host machine has a pair of soot models providing respective actual and modeled soot mass values for the soot contained in the particulate filter, calculates a ratio of a change in the actual and modeled soot masses, and executes a control action when the ratio exceeds a calibrated threshold. A diagnostic code and/or activation of an indicator device may be part of the control action. A system includes the particulate filter and host machine noted above. A method for use aboard the vehicle includes determining the actual and modeled soot mass values using first and second soot models, respectively, calculating a ratio of a change in the actual and modeled soot mass, comparing the ratio to a calibrated threshold, and executing a control action when the ratio exceeds the threshold.02-02-2012
20100263353EXHAUST TREATMENT DEVICE HAVING FLOW-PROMOTING END CAPS - An end cap for an exhaust treatment device is disclosed. The end cap has a cylindrical housing with an axial direction, a radial direction substantially orthogonal to the axial direction, a first open end, and a second closed end opposing the first open end in the axial direction. The end cap also has an integral port member extending from an annular surface of the cylindrical housing. The integral port member has a central axis aligned in the radial direction, and an exterior surface of the integral port member tangentially connects to an exterior surface of the cylindrical housing.10-21-2010
20120060478METHOD FOR DIAGNOSING A DIESEL OXIDATION CATALYST - A method and a control system are provided for diagnosing a diesel combustion catalyst that is located in an exhaust line within a diesel engine system. The method comprising providing an unburned fuel mass flow through the diesel oxidation catalyst, determining the oxidation heat release rate which is related to the exothermic oxidation reactions of the unburned fuel into the diesel oxidation catalyst, integrating the determined oxidation heat release rate on a time interval, integrating the unburned fuel mass flow on the same time interval, dividing the integrated value of oxidation heat release rate and the integrated value of unburned fuel mass flow for determining an efficiency index (DOI) of the diesel oxidation catalyst.03-15-2012
20120110981Reduction of NOx Trap at Engine Shutoff - The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.05-10-2012
20100319317AMMONIA VAPOR STORAGE AND PURGE SYSTEM AND METHOD - A method of operating a reductant delivery and storage system of a vehicle, comprising of storing an ammonia-containing fluid in a first storage device, generating ammonia vapors in the first storage device and storing said generated ammonia vapors in a second storage device, purging said stored vapors from the second storage device to an exhaust of the engine, delivering said ammonia-containing fluid to said exhaust of the engine, and adjusting at least one of an amount of ammonia-containing fluid delivered and an amount of vapors purged to said exhaust based on the other of said at least one of said amount of ammonia-containing fluid delivered and said amount of vapors purged to said exhaust.12-23-2010
20110192138HC Adsorber with OBD Capability - A device and process for storing hydrocarbons as part of an exhaust emission control system and diagnosing the state of said device based on the incorporation of reactive metal species within the porous microstructure of the associated hydrocarbon adsorbent.08-11-2011
20110192140PRESSURE SWIRL FLOW INJECTOR WITH REDUCED FLOW VARIABILITY AND RETURN FLOW - A reagent injector with a cartridge design has a body with a reagent inlet, outlet, and a swirl chamber, which has an exit orifice that may be covered and uncovered by a solid, movable pintle. Reagent flows through the injector when the exit orifice is covered and uncovered to cool the injector. An insulator may be disposed between the injector body and a mounting flange connectable to an exhaust system. A flow path ensures cooling of an electromagnetic actuator. Reagent may bypass an orifice swirl chamber when the pintle blocks the exit orifice. Fluid may flow between an outside diameter of a pole piece and an inside diameter of an electromagnetic actuator, through an orifice chamber and return through a central bore housing a solid pintle, around which fluid may flow. Different inner injector body passages may direct fluid into an orifice distribution chamber and out to the solid pintle.08-11-2011
20110192143METHOD AND APPARATUS FOR COLD STARTING AN INTERNAL COMBUSTION ENGINE - The present invention relates to a method for achieving reduced emissions at cold start of an internal combustion engine having an exhaust gas after treatment system comprising at least one Diesel Oxygen Catalyst (DOC), at least one Diesel Particulate Filter (DPF) and a Selective Catalytic Reduction (SCR) unit, comprising the steps of: heating the DOC prior to cold starting said internal combustion engine, starting and controlling the internal combustion engine towards low NOx emission when said DOC has reached a predetermined temperature, optimizing the fuel consumption at a given total emission level when said DPF and SCR has reached a predetermined temperature.08-11-2011
20110167799NOx EMISSION REDUCTION SYSTEM AND METHOD - A method and system to reduce NO07-14-2011
20110167798SYSTEM AND METHOD FOR SEQUESTERING EMISSIONS FROM ENGINES - A system is provided for sequestering carbon dioxide emitted in exhaust gas from an engine. The exhaust gas may be cooled using heat exchange techniques, for example reverse flow heat exchangers. Carbon dioxide may be separated from the exhaust gases, for example using fractional distillation, heat exchangers, and turbo chargers. The separated carbon dioxide may be stored, for example using injection deep into the earth for enhancing natural gas and oil extraction. Alternatively, the separated carbon dioxide may be cooled to solid carbon dioxide and stored, for example, in an LNG tank for use as ballast onboard a ship or for use in industry.07-14-2011
20110167800EVEN-LOADING DPF AND REGENERATION THEREOF - A motor-vehicle engine system comprises an envelope configured to transmit exhaust. The envelope encloses a first array of filtration cells downstream of a second array of filtration cells. Each cell of the first array has one open end and one closed end. Each cell of the second array has one or two open ends. The system further comprises a fuel injector configured to increase a temperature in the envelope when soot is evenly distributed between the first and second arrays.07-14-2011
20090120061Hydrocarbon Retaining and Purging System - Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described.05-14-2009
20110167802METHOD FOR OPERATING AN EXHAUST-GAS SYSTEM WITH LAMBDA CONTROL AND MOTOR VEHICLE HAVING THE SYSTEM - A method for operating an exhaust-gas system of an internal combustion engine having at least one particle separator and a catalytic converter, includes at least the following steps: a) carrying out processes in the internal combustion engine with lambda control about a control value; b) identifying a regeneration process of the particle separator; c) determining an oxygen demand for the regeneration process of the particle separator; and d) adapting the lambda control by the defined oxygen demand for a time period of the regeneration process of the particle separator. A motor vehicle having a spark-ignition engine and being suitable for carrying out the method, is also provided.07-14-2011
20110167796EXHAUST GAS AFTER-TREATMENT HAVING REDUCED RHODIUM DEPLETION - In a method for the after-treating of an exhaust gas from a preferably direct-injection and/or spark-ignition internal combustion engine, the exhaust gas is fed through a catalytic converter system connected downstream of the internal combustion engine. The system has at least one catalyst with a noble metal depletion having at least the elements palladium and rhodium which are present in a weight ratio of >5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, or 12:1. In the new European driving cycle, the catalyst exceeds a temperature T07-14-2011
20120291421EXHAUST TREATMENT METHODS AND SYSTEMS - A control method for an exhaust treatment system is provided. The method includes: selectively determining a fluid state from a plurality of fluid states based on a temperature of a fluid supply source; estimating an average consumption rate based on the fluid state; and evaluating a fluid supply within the fluid supply source based on the average consumption rate.11-22-2012
20110203258EXHAUST VALVE ACTUATION SYSTEM FOR DIESEL PARTICULATE FILTER REGENERATION - An exhaust valve actuation system (08-25-2011
20110203257DIESEL DOSING SYSTEM FOR ACTIVE DIESEL PARTICULATE FILTER REGENERATION - A diesel dosing module utilizes a diesel fuel shut-off valve, a diesel fuel dosing valve to provide dosing fuel to the inlet of a diesel oxidation catalyst and an air purge valve to purge fuel from a dosing line attached to the diesel dosing module and from a nozzle attached to a distal end of the dosing line. The valves are attached to a housing manifold which is remotely positionable from the nozzle and the high heat areas of the vehicle.08-25-2011
20110203259METHOD FOR CORRECTING AN ESTIMATE OF NH3 STORED WITHIN A SELECTIVE CATALYST REDUCTION SYSTEM - A method for correcting an estimated amount of NH08-25-2011
20080245055APPARATUS AND METHOD FOR OPERATING AN EMISSION ABATEMENT SYSTEM - A method of operating an emission abatement system includes advancing a liquid agent to an atomizing nozzle and advancing pressurized air to the atomizing nozzle. The method further includes impinging the pressurized air on the liquid agent at a tip of the atomizing nozzle to shear liquid agent particles from the liquid agent. The method further includes advancing the liquid agent particles through the atomizing nozzle to an emission abatement device. An emission abatement system and atomizer apparatus are also disclosed herein.10-09-2008
20110000189DENOX OF DIESEL ENGINE EXHAUST GASES USING A TEMPERATURE-CONTROLLED PRECATALYST FOR PROVIDING NO2 IN ACCORDANCE WITH THE REQUIREMENTS - The adherence to future legally obligatory exhaust gas limit values for diesel vehicles in Europe, North America and Japan requires not only the removal of particles but also effective removal of nitrogen oxides from the exhaust gas (‘deNOx’). The ‘active SCR process’ is the preferred method for this. The nitrogen oxide conversions achieved by means of this process are particularly high when an optimal NO01-06-2011
20120291422PARTICULATE FILTER AND ASSOCIATED METHODS FOR EXHAUST PURIFICATION - A particulate filter for a vehicle exhaust system includes a primary filter surrounded by a secondary filter and a quenching agent injection nozzle arranged upstream of the primary filter. In a normal mode, exhaust flows through the primary filter, and in a fail-safe mode or a mixed mode, at least some exhaust flows through the secondary filter and quenching agent is injected via the nozzle to cool the primary filter. The fail-safe or mixed modes may be enacted during an overload of the primary filter, for example. If engine shutdown is initiated during regeneration of the primary filter, a rate of quenching agent injection may be adjusted so that the regeneration may be completed at a safe temperature.11-22-2012
20120291420OXIDATION CATALYSTS FOR ENGINES PRODUCING LOW TEMPERATURE EXHAUST STREAMS - The oxidation of carbon monoxide (CO) and hydrocarbons (HC) in an oxygen-containing gas stream, such as the exhaust stream from a diesel engine, or other lean-burn engine, may be catalyzed using a combination of mixed oxide particles of cerium, zirconium and copper, and discrete particles of an alumina-supported platinum group metal catalyst. The catalyzed oxidation of CO and HC by this combination of oxidation catalyst particles is effective at temperatures below 300° C.11-22-2012
20080264036Advanced engine control - A method for controlling an internal combustion engine to maintain a predetermined combustion efficiency, comprises: measuring the concentration of CO in an engine-out emission; determining whether the measured concentration of CO is above or below a target CO concentration for the engine under the operating conditions in use; and if the concentration of CO is above the target CO concentration, adjusting one or more engine and/or combustion parameters so as to reduce the concentration of CO in the engine-out emission, and if the concentration of CO is below the target CO concentration, adjusting one or more engine and/or combustion parameters so as to increase the concentration of CO in the engine-out emission; wherein the target CO concentration is determined on the basis of a correlation with indicators of combustion efficiency under known engine operating conditions. Exhaust gas recirculation (EGR) is one such engine and/or combustion parameter. A method for controlling an internal combustion engine to obtain an engine-out emission level of NOx within a predetermined concentration range is also described. The methods may be implemented by an engine control unit.10-30-2008
20100212293Palladium-Supported Catalyst Composites - Provided are catalyst composites that can be used in methods for treating exhaust gas from internal combustion engines, including diesel and gasoline engines, systems including such catalyst composites and methods of using the catalyst composites to treat internal combustion engine exhaust. The catalyst composites may provide diesel oxidation catalysts and three-way catalysts. A catalyst composite is provided which a catalytic material on a carrier, the catalytic material including a palladium component dispersed on a first support comprising at least 60% by weight of a zirconia component, and one or more rare earth oxides selected from the group consisting of lanthana, neodymia, praseodymia, yttria, the first support optionally containing no more than 15% by weight ceria, and being free of alumina. Layered catalyst composites having one or more washcoats on the carrier are also provided.08-26-2010
20080236143WASTE GAS PURIFICATION APPARATUS AND METHOD THEREFOR - A waste gas purification apparatus comprises a cooling unit including a cooling chamber containing a cooling fluid and a waste gas transmission pipe passing through the cooling chamber and immersing in the cooling fluid, which is used to cool the waste gas input into the waste gas transmission pipe; a dust eliminating unit provided at the downstream side of the cooling unit and used to eliminate harmful substances and dust contained in the waste gas; an absorbing unit provided at the downstream side of the dust eliminating unit and containing an absorbing fluid, which is used to eliminate carbon dioxide and sulfide contained in the waste gas by mean of the reaction between the absorbing fluid and the carbon dioxide and sulfide, in which the carbon dioxide and sulfide react with the absorbing fluid to generate precipitates; and a cleaning unit provided at the downstream side of the absorbing unit and containing a cleaning fluid, which is used to eliminate harmful substances and dust remained in the waste gas. A waste gas purification method is also provided.10-02-2008
20080314021METHOD TO RE-OPEN ASH FILLED CHANNELS IN DIESEL PARTICULATE FILTERS - A method for determining a time duration and an amount of fuel to include within exhaust gases to facilitate sintering of ash within a diesel particulate filter to reopen ash filled channels in said diesel particulate filter.12-25-2008
20130213012METHOD TO DETECT AND MITIGATE UNSOLICITED EXOTHERMS IN A DIESEL AFTERTREATMENT SYSTEM - Methods for monitoring and detecting undesired exotherms which may occur in an exhaust aftertreatment system coupled to a lean burning combustion engine are described. In one particular approach, an undesired exotherm may be indicated based on an expected oxygen depletion along a length of an exhaust aftertreatment system in the direction of exhaust gas flow of exhaust gas. For example, during DPF regeneration, a certain amount of oxygen is expected to be utilized for removing soot. If less oxygen is actually found in the exhaust downstream of the exhaust system, then an undesired exotherm may be present, as unintended reductant may be present in the exhaust and reacting exothermically with oxygen. Various mitigation actions may then be initiated in response to the indication of an undesired exotherm.08-22-2013
20130213008METHOD AND SYSTEM FOR IMPROVING THE ROBUSTNESS OF AFTERTREATMENT SYSTEMS - A method for treating a catalyst in an internal combustion engine is disclosed. The method comprises detecting the efficiency of a catalyst; sending the catalyst efficiency to a threshold monitor; and heating the catalyst when the detected catalyst efficiency is below a predetermined percentage.08-22-2013
20090266051Radiant Power from Pulsed Laser and Microwave for Eliminating Noxious Emissions of Hydrocarbon combustions - A method and apparatus for eliminating noxious products in the emissions of hydrocarbon combustions exhaust gases includes the combination of three forms of radiant energy production which all together and/or also separately concur to eliminate all the carbon particulates and the unburnt hydrocarbons, as well as the volatile gases (SOV) deriving from combustion processes of any kind. The three forms of radiant energy are: radiant energy by means of radiant tubes; radiant energy produced by bombarding the material by means of microwaves due to a quantum effect; and radiant energy created by pulsed laser rays properly sent upon a graybody.10-29-2009
20090266050METHOD FOR CONTROLLING THE REGENERATION OF AN ELECTROSTATIC PARTICLE FILTER - A method for controlling regeneration of a particle filter by electrically heating the particle filter. According to the method, the regeneration is triggered by a calculator according to a loading level and temperature of the particle filter. The calculator simultaneously uses parameters relating to the operation of the vehicle so as to take into account the fuel consumption driven by the electrical heating of the filter.10-29-2009
20080282671Electrically heated particulate filter propagation support methods and systems - A control system that controls regeneration of a particulate filter is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate combustion of particulate matter in the particulate filter. A propagation module estimates a propagation status of the combustion of the particulate matter based on a combustion temperature. A temperature adjustment module controls the combustion temperature by selectively increasing a temperature of exhaust that passes through the particulate filter.11-20-2008
20080282670LNT-SCR system optimized for thermal gradient - In an exhaust aftertreatment system, two LNTs having differing compositions are configured in series downstream from an inline fuel reformer. The downstream LNT is adapted for desulfation at higher temperatures than the upstream LNT. During desulfation, the system develops temperature gradients with the temperatures increasing in the direction of exhaust flow. The ordering of the LNTs is designed utilize these gradients. In a preferred embodiment, the system also includes two SCR catalysts having different compositions. The SCR catalyst with a composition adapted to tolerate higher temperatures is located nearer the downstream end of the system.11-20-2008
20080282669PARTICULATE FILTER HAVING EXPANSIBLE CAPTURE STRUCTURE FOR PARTICULATE REMOVAL - A combustion engine comprising an exhaust system containing a particulate filter (11-20-2008
20120291419Methods And System For Ash Detection In Exhaust Particulate Filter - A method of detecting ash in an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy through an exhaust particulate filter containing soot and ash, and sensing a strength of the transmitted electromagnetic energy after having been attenuated in response to the soot. The method further includes electronically storing a filter monitoring history responsive to a difference between the transmitted strength and the sensed strength of the electromagnetic energy, and detecting an amount of the ash based at least in part upon a pattern of electromagnetic energy attenuation defined by the stored filter monitoring history. An exhaust particulate filter system for implementing related methodology includes a microprocessor configured to determine a value indicative of an amount of ash contained within an exhaust particulate filter responsive to a pattern of electromagnetic energy attenuation defined by a stored filter monitoring history.11-22-2012
20080289319System and method for removing carbon dioxide from an atmosphere and global thermostat using the same - A system for removing carbon dioxide from an atmosphere to reduce global warming including an air extraction system that collects carbon dioxide from the atmosphere through a medium and removes carbon dioxide from the medium; a sequestration system that isolates the removed carbon dioxide to a location for at least one of storage and generation of a renewable carbon fuel; and one or more power supplying units that supply heat to the air extraction system to remove the carbon dioxide from the medium, at least one of the one or more power supplying units being a fossil fuel plant.11-27-2008
20080295486Exhaust treatment system implementing temporary engine control - An exhaust treatment system associated with a power source is disclosed. The exhaust treatment system may have a filter located to remove particulate matter from a flow of exhaust, and a regeneration device located proximal the filter. The exhaust treatment system may also have a fluid handling component located upstream of the power source to vary an amount of oxygen in the flow of exhaust, and a controller in communication with the regeneration device and the fluid handling component. The controller may determine a need for filter regeneration, and determine an adjustment to the fluid handling component required to provide sufficient oxygen in the exhaust flow for filter regeneration. The controller may further determine an effect the adjustment will have on operation of the power source, and determine an correction for the power source to account for the effect. The controller may substantially simultaneously implement the adjustment and the correction.12-04-2008
20080295485Regeneration system - An regeneration system for use in a power system is disclosed. The regeneration system may include a source of intake air, an engine brake configured to reduce the speed of an engine by compression and release of the intake air, and a valve configured to divert a portion of the intake air to an auxiliary device. The regeneration system may further include a controller in communication with the engine brake and the valve. The controller may be configured to move the valve to reduce the portion of intake air diverted to the auxiliary device when the engine brake is active.12-04-2008
20130118149SYSTEMS AND METHODS FOR AN EXHAUST GAS TREATMENT SYSTEM - Various systems and methods are provided for an exhaust gas treatment system. In one example, a system includes an exhaust gas treatment device and a wire wrapped around an exterior circumference of the exhaust gas treatment device. Continuity of the wire is monitored such that degradation of the wire due to degradation of the exhaust gas treatment device is indicated.05-16-2013
20130118150EXHAUST SYSTEM FOR INTERNAL COMBUSTION ENGINE - In an exemplary embodiment of the invention an exhaust gas after treatment system for an internal combustion engine comprises an exhaust gas conduit configured to transport exhaust gas from the internal combustion engine to exhaust treatment devices of the exhaust gas treatment system. A controller in signal communication with the exhaust gas aftertreatment system is configured to monitor the temperature of a selective catalytic reduction device, wherein the controller is operable to move a valve assembly to an open position when the selective catalytic reduction device is at or above an operating temperature and to move the valve assembly to a closed position when the selective catalytic reduction device is below the operating temperature for entrainment of NOx constituents from the exhaust gas.05-16-2013
20130118153METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS - A method for cooling a dosing unit (05-16-2013
20130118156EXHAUST GAS TEMPERATURE RAISING APPARATUS AND A METHOD FOR REMOVAL OF FUEL SUPPLY VALVE CLOGGING - The present invention is intended to provide a technique which serves to suppress unburnt HC from being discharged to a downstream side, when fuel is injected from a fuel supply valve for removing clogging thereof. The present invention is provided with a fuel supply valve that supplies fuel to an exhaust passage of an internal combustion engine, and an ignition unit that ignites the fuel supplied from the fuel supply valve, wherein in cases where there is a possibility that clogging may occur in an injection hole of the fuel supply valve, fuel for removal of clogging is injected from the fuel supply valve. An amount of the fuel to be injected from the fuel supply valve for removing clogging thereof is an amount of fuel which is able to be combusted by being ignited by means of the ignition unit.05-16-2013
20080289318Low Temperature Emission Control - A method of controlling an engine having a lean NOx trap in the exhaust is described. The method comprises during a first mode, at a first temperature, storing NOx at a lean condition and then purging stored NOx from the NOx trap at a rich condition without concurrently supplying oxygen to the trap during the purging and during a second mode, at a second, lower temperature, storing NOx at a lean condition and then purging stored NOx from the NOx, where an exothermic reaction is generated to temporarily raise the temperature of the trap by supplying oxygen and reductants with an overall rich mixture to the trap during the purging.11-27-2008
20120137657SCR CLOSED LOOP CONTROL SYSTEM - A method for an exhaust after treatment system of an engine including at least one selective catalyst reaction (SCR), at least one clean up catalyst downstream from the SCR, a urea injector upstream of the SCR and a first NOx sensor downstream the clean up catalyst. The method includes the steps of injecting a predetermined amount of urea by the injector, providing a second NOx sensor between the SCR and the clean up catalyst, measuring the NOx content received by the first NOx sensor, measuring the NOx content received by the second NOx sensor, comparing the first and the second NOx content with each other, and reducing the predetermined amount of urea if the first NOx sensor measures a higher NOx content than the second NOx sensor.06-07-2012
20080271434Method and apparatus for generating a reductant in an exhaust gas of a compression-ignition engine - A method and apparatus are provided for generating a reductant in an exhaust gas feedstream of a compression-ignition internal combustion engine upstream of a hydrocarbon-selective catalytic reduction catalyst. The method comprises injecting a quantity of fuel into the exhaust gas subsequent to a combustion event whereat a temperature of the exhaust gas is in a range of 670 K to 1100 K at a start of the injection. The generated reductant comprises an active species including an oxygenated fuel species.11-06-2008
20100024389NITROGEN OXIDE ESTIMATION DOWNSTREAM OF A SELECTIVE CATALYTIC REDUCTION CATALYST - A dosing control system comprises a selective catalytic reduction (SCR) analysis module, a dosing management module, an adjustment module, and an error module. The SCR analysis module estimates ammonia (NH3) stored by an SCR catalyst, a maximum NH3 storage capacity of the SCR catalyst, and a nitrogen oxides (NOx) measurement for a NOx sensor downstream of the SCR catalyst. The dosing management module controls dosing agent injection upstream of the SCR catalyst based on the maximum NH3 storage capacity and the NH3 stored. The adjustment module outputs an adjusted estimate of the NOx measurement based on the estimate of the NOx measurement, cross-sensitivity of the NOx sensor, and a delay period for exhaust flow. The error module selectively adjusts at least one of the NH3 stored and the maximum NH3 storage capacity based on a difference between the adjusted estimate and NOx measured by the NOx sensor.02-04-2010
20090173058SYSTEM AND METHOD FOR THE ON-BOARD PRODUCTION OF REDUCTANTS - A system is provided for the on-board production of reductants. The system comprises a fuel tank adapted to directly or indirectly supply a first fuel stream and a second fuel stream. An engine is in fluid communication with the fuel tank, and is configured to receive the first fuel stream and create an exhaust stream. The system further includes an emission treatment unit to treat the exhaust stream. A fuel conversion unit is configured to receive the second fuel stream, and also receive a stream comprising oxygen to partially oxidize at least a portion of the second fuel stream thereby forming reductants. In addition, the fuel conversion unit is configured to supply a reductant stream comprising the reductants to the exhaust stream. The invention further provides a method for the on-board production of reductants including supplying a first fuel stream to an engine, wherein the engine is configured to create an exhaust stream. A second fuel stream and a stream comprising oxygen are supplied to a fuel conversion unit. At least a portion of the second fuel stream is partially oxidized in the fuel conversion unit to form reductants, and a reductant stream comprising the reductants is supplied to the exhaust stream. The selective catalytic reduction of NOx present in the exhaust stream is performed.07-09-2009
20090139209Metering apparatus and method for operating it - In a metering apparatus for the metered introduction of a first medium into an exhaust gas system of an internal combustion engine, which includes a conditioning apparatus in which also a second medium is introduced via a dispensing apparatus which is connected to the conditioning apparatus and via which the first medium and the second medium are introduced into the exhaust gas system, a supply unit for supplying a third medium, which is different from the second medium in its physical properties and/or its chemical composition, is connected to the conditioning apparatus for cleaning of the conditioning apparatus and the dispensing apparatus from constituent parts of the first medium by the third medium or a mixture of the second and the third medium.06-04-2009
20090139207Thermo-electric auxiliary power unit - An auxiliary power unit disclosed. The auxiliary power unit includes an exhaust passage configured to direct a flow of exhaust from a primary mover, a catalyst substrate disposed within the exhaust passage, and a heater configured to heat the catalyst substrate. The auxiliary power unit also includes a cooling jacket associated with the exhaust passage. The auxiliary power unit further includes a thermo-electric device disposed between the cooling jacket and the exhaust passage. The thermo-electric device is configured to generate electrical power from a temperature gradient created by the heater and the cooling jacket when the primary mover is non-operational.06-04-2009
20120137659Hydrocarbon Retaining System Configuration for Combustion Engine - Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described.06-07-2012
20090199540METHOD FOR OPERATING A REAGENT METERING VALVE AND APPARATUS FOR CARRYING OUT THE METHOD - A method is proposed for operating a metering valve which is realized as a solenoid valve which is actuated by an electromagnet that interacts with an armature which is connected fixedly to a valve needle and, furthermore, is loaded with a pulse-width modulated metering signal which defines the metering of a reagent which is to be introduced into the exhaust-gas region of an internal combustion engine or of a preliminary stage of a reagent, as is an apparatus for carrying out the method. The opening duration of the metering valve is limited to a minimum opening duration, for which the metering valve is opened completely and which is fixed in such a way that a spray mist is always produced during the metering. The procedure according to this invention prevents the reagent from crystallizing and, as a result, firstly ensures exact metering of the reagent and secondly counteracts clogging of the metering valve, in particular if a urea/water solution is provided as preliminary stage of the reagent.08-13-2009
20090199538 FLUID TRANSFER SYSTEM AND METHOD - The present invention relates to a fluid transfer system and method for transferring fluid from a reservoir (08-13-2009
20090019831Regeneration method for ceramic honeycomb structures - A method for regenerating a diesel particulate filter includes elevating a temperature of a gas stream flowing into an inlet of the diesel particulate fitter to greater than or equal to 450° of the inlet of the diesel particulate filter, wherein the gas stream at the inlet of the diesel particulate fitter contains an amount of NOx of equal to or greater than 300 ppm, and an amount of O01-22-2009
20120067030METHOD FOR PURIFYING THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE HAVING A CATALYTIC CONVERTER - The present invention relates to a method for purifying the exhaust gases of an internal combustion engine having a catalytic converter which comprises oxygen storage components. The invention is concerned particularly with the restoration of the optimum filling degree of the oxygen storage components for regulated stoichiometric operation after the engine has been operated under lean conditions for a relatively short or relatively long period of time.03-22-2012
20120067029Method for Operating an Internal Combustion Engine - In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting.03-22-2012
20120067027Exhaust Injection Muffler - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust.03-22-2012
20120067026Exhaust Gas Treatment System for an Internal Combustion Engine - An exhaust gas treatment system for an internal combustion engine comprises an oxidation catalyst device configured to oxidize the hydrocarbon and carbon monoxide in the exhaust gas. A first temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. A second temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. The temperature probe includes a catalyst compound coating disposed thereon and is operable to catalyze the oxidation of CO and HC, or a combination thereof, that exits the oxidation catalyst device. A controller is in signal communication with temperature sensors and is configured to monitor signals from temperature sensors to determine if the temperature differential exceeds a predetermined threshold.03-22-2012
20110219745METHOD AND APPARATUS FOR GASEOUS MIXING IN A DIESEL EXHAUST SYSTEM - A mixing device and method for a diesel exhaust system is disclosed having a chamber, a mixer within the chamber, and an injection tube supported on the mixer within the chamber. The mixer is positioned within the chamber adjacent an inlet and includes a plurality of angled blades to effect turbulent flow in a diesel exhaust stream entering the chamber through the inlet. The injection tube includes a plurality of injection points (e.g., openings) for discharging a reagent, such as gaseous ammonia (NH09-15-2011
20090158707ENGINE AFTER-TREATMENT CONTROLS USING DOSING BELOW CATALYST LIGHT-OFF TEMPERATURE - A method of controlling dosing of a hydrocarbon fuel into the exhaust gas of a combustion engine upstream of a particulate filter when the exhaust gas temperature into an oxidation catalyst upstream of a particulate filter has dropped below the light-off temperature of the catalyst.06-25-2009
20110138781METHOD FOR REMOVING COMPOUNDS CONTAINING SULFUR FROM FUELS - The present invention relates to a process for removing sulfur-comprising compounds from fuels, wherein a sulfur-comprising fuel is brought into contact with copper-1,3,5-benzenetricarboxylic acid MOF.06-16-2011
20110138780METHOD OF TREATING POLLUTANTS CONTAINED IN EXHAUST GASES, NOTABLY OF AN INTERNAL-COMBUSTION ENGINE, AND SYSTEM USING SAME - The present invention relates to a method of treating exhaust gas pollutants, notably of an internal-combustion engine, with a system comprising an exhaust line (L) with selective catalytic reduction catalysis means (06-16-2011
20110138777DIESEL ENGINE EXHAUST TREATMENT SYSTEM AND METHOD INCLUDING A PLATINUM GROUP METAL TRAPPING DEVICE - A diesel engine exhaust treatment system and method is provided which includes a platinum group metal trapping device positioned between a diesel oxidation catalyst and an SCR catalyst. The platinum group metal trapping device traps trace amounts of platinum group metals which may be released from the diesel oxidation catalyst during engine operation and prevents them from accumulating on the SCR catalyst, preventing potential contamination of the SCR catalyst as well as ensuring that the performance of the SCR catalyst is uninhibited.06-16-2011
20090205316System and processes for storing an additive and injecting it into the exhaust gases of an engine - System for storing an additive solution and injecting it into the exhaust gases of an internal combustion engine, the system comprising a tank for storing the additive and a rotary pump, a metering valve and an injector which are separate devices, this system making it possible to meter and inject the additive solution into the exhaust gases as is, without diluting it with a gas. In this system, the pump outlet pressure is regulated by adjusting the rotational speed of the pump.08-20-2009
20110138782Particle Filter Arrangement - A particle filter arrangement for filtering exhaust gases of an internal combustion engine such as a diesel internal combustion engine, includes an inlet and an outlet and at least one particle filter arranged in the flow path of the exhaust gases between the inlet and outlet. The exhaust gases are conducted in a line, with the line having a first segment in which the exhaust gases are conducted substantially in the direction of the outlet. The line has a second segment in which the exhaust gases are conducted substantially in the direction of the inlet. An operating temperature of the arrangement sufficiently high to prevent full loading of the filter is generated particularly quickly in that the line also includes a third segment in which the exhaust gases are conducted substantially in the direction of the outlet.06-16-2011
20110225951INTERNAL COMBUSTION ENGINE EXHAUST GAS CONTROL APPARATUS AND ABNORMALITY DETERMINING METHOD THEREOF - When it is estimated that an amount of oxygen stored in the catalyst is a maximum amount, an electronic control unit executes forced rich control and estimates a maximum oxygen release amount during a period between the start of this control and a rich reversal of an output of the oxygen sensor, based on this period of time. When it is estimated that the amount of oxygen stored in the catalyst is a minimum amount, the electronic control unit executes forced lean control and estimates a maximum oxygen storage amount during a period between the start of this control and a lean reversal of the output of the oxygen sensor, based on this period of time. If the absolute value of a difference between the maximum oxygen release amount and the maximum oxygen storage amount is equal to or greater than a predetermined value, an exhaust gas control apparatus and a method for determining an abnormality thereof determine that there is a response delay.09-22-2011
20110138779Determination of the Linear Correlation Between Signals, Which are Determined by Means of NOx Sensors, in an SCR Exhaust Gas Aftertreatment System - A measurement method is provided for an SCR exhaust gas aftertreatment system of a vehicle, where the SCR exhaust gas aftertreatment system includes a first NO06-16-2011
20110138778METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE - The invention relates to a method that is intended for operating an internal combustion engine of a motor vehicle and that flushes the temporarily unused injection valves with fuel for the purpose of preventing and/or removing deposits. In order to make possible in a simple way a complete conversion of the undesired exhaust gas constituents in a catalytic converter of an exhaust gas aftertreatment system of the internal combustion engine when the internal combustion engine is running, the invention proposes flushing the temporarily unused injection valves with fuel during an overrun mode of the internal combustion engine.06-16-2011
20090211230Method and Apparatus for Temperature Management in an Exhaust Gas Posttreatment System - A method of and apparatus for controlling the reducing agent in an exhaust gas aftertreatment system of an internal combustion engine with an exhaust gas duct in which an SCR catalyst is provided in the direction of flow of the exhaust gas. A reducing agent-generating system (RGS) comprising an NOx and CO/H2 production unit as well as a combined NOx storage/ammonia production unit in the standard gas path of the reducing agent-generating system. Ammonia is delivered upstream from the SCR catalyst to reduce nitrogen oxides, starting materials for producing the ammonia being fed at least in part to the NOx and CO/H2 production unit via a fuel inlet and an air inlet. An AGC matrix of the combined NOx storage/ammonia production unit is cooled at least intermittently by means of an inner and/or outer cooling device. Cooling results in the longest possible section of the running length (L) and thus the largest possible volume percent of the AGX matrix within the combined NOx storage/ammonia production unit having an optimum temperature range regarding the highest possible ammonia yield, which overall contributes to a great ammonia production rate.08-27-2009
20090133382Electrically regenerated exhaust particulate filter for an engine system and operating strategy therefor - An exhaust particulate filter for an engine system includes an array of filter cartridges positioned within a shell, each of the cartridges having an electrically powered heating element coupled therewith. Exhaust gases are distributed among the cartridges according to a single distribution pattern, and the filter can be regenerated without diverting, dividing or bypassing exhaust gases from the filter. Other aspects include feedback control and feedforward control of regeneration based on sensing an electrical resistance property of each of the electrically powered heating elements.05-28-2009
20120227379Filter Cleaning With An Engine Idle Bump - Disclosed is a method of filter regeneration employing an automatic increase in the minimum speed of an engine when a vehicle is in a parked state. The filter regeneration until the operator cancels it or filter regeneration is determined to be complete.09-13-2012
20090205315Apparatus and Method for PM Purification - The present invention provides an apparatus and a method for PM purification, where good PM purification performance can be achieved. The PM purification apparatus 08-20-2009
20090199539COATING FOR PARTICULATE FILTERS - The invention relates to the coating of a particulate filter used in the treatment of exhaust or waste gases. In the manufacturing of the coating according to the invention, there is used a liquid-based sol, where the average particle size of the contained particles is below 100 nm, preferably below 50 nm.08-13-2009
20110099975ARCHITECTURAL DIESEL OXIDATION CATALYST FOR ENHANCED NO2 GENERATOR - A device is described which provides thermally durable NO05-05-2011
20090255232EXHAUST GAS SUBSEQUENT TREATMENT METHOD AND METHOD THEREFOR - A method and device for treating exhaust gases of an internal combustion engine with a reducing agent introduced into the exhaust gases. The reducing agent is pumped out of a reactant reservoir and to a dosing valve so that after the dosing valve is opened, the reducing agent can be introduced into the engine's exhaust gas line in a dosed manner. Reducing agent can be conveyed back from the delivery device to the reservoir via a return line. The reducing agent can circulate between the delivery device and the reactant reservoir thereby, particularly when the dosing valve is closed, preventing the reactant from freezing.10-15-2009
20120090297METHOD FOR ADAPTING A LEAN NOX TRAP IN AN EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a lean NOx trap (LNT) in an exhaust system of a motor vehicle is provided. The method comprises if a difference between an estimated NOx concentration and a measured NOx concentration in exhaust downstream of the LNT is greater than a threshold, calculating an adaptation value, the estimated NOx concentration downstream of the LNT based on a kinetic model, and adapting the kinetic model, adjusting one or more operating parameters of the LNT, and indicating an aging state of the LNT based on the adaptation value. In this way, the model may be updated in real time to produce a robust prediction of LNT function.04-19-2012
20110225952EXHAUST GAS PURIFICATION CONFIGURATION AND METHOD FOR EXHAUST GAS PURIFICATION USING A REACTANT - A configuration for purification of an exhaust gas flow of an internal combustion engine includes at least one exhaust gas line having an element for exhaust gas purification with a first end face and a second end face. The exhaust gas flows through the element from the first end face to the second end face. An adding device is provided downstream of the element for adding a reactant to the exhaust gas flow. The adding device is positioned at a distance of no more than 30 mm from the second end face of the element in such a way that at least part of the added reactant strikes the second end face of the element. A method for adding a reactant into an exhaust line during the operation of an internal combustion engine is also provided.09-22-2011
20100186375Layered Diesel Oxidation Catalyst Composites - Provided are diesel exhaust components where palladium is segregated from a molecular sieve, specifically a zeolite, in a catalytic material. In the catalytic material, therefore, there are at least two layers: a palladium-containing layer that is substantially free of a molecular sieve and a hydrocarbon trap layer that comprises at least one molecular sieve and is substantially free of palladium. The palladium is provided on a high surface area, porous refractory metal oxide support. The catalytic material can further comprise a platinum component, where a minor amount of the platinum component is in the hydrocarbon trap layer, and a majority amount of the platinum component is in the palladium-containing layer. Systems and methods of using the same are also provided.07-29-2010
20100154385THERMAL PROTECTION SYSTEM FOR REDUCING AGENT INJECTOR - An engine control system includes a temperature determination module, a reducing agent control module, and a control module. The temperature determination module determines a temperature of a reducing agent injector heated by an exhaust gas. The reducing agent control module actuates the reducing agent injector to inject an amount of reducing agent into the exhaust gas when the temperature is greater than or equal to a temperature threshold. The control module controls a concentration of nitrogen oxides in the exhaust gas based on the amount of reducing agent injected into the exhaust gas.06-24-2010
20130213009METHOD FOR INITIATING AND MAINTAINING A SUBSTOICHIOMETRIC OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE FOR CARRYING OUT A METHOD OF THIS KIND - The present disclosure describes systems and methods for recharging a storage catalyst of an internal combustion engine. A method is described, comprising: while operating an engine in a substoichiometric operating mode when the engine is under medium load and responsive to an LNT condition, assisting the engine with an electric machine connected to an engine crankshaft. The electric machine provides an auxiliary drive to assist the engine in maintaining the substantially steady state substoichiometric operating mode which may be used to reduce NO08-22-2013
20130213011METHOD FOR REDUCING THE AMOUNT OF NOX IN THE EXHAUST GASES OF A MOTOR VEHICLE - The invention relates to a method for controlling a system for reducing the amount of NOx in the exhaust gases of a motor vehicle. The system comprises a storage chamber (08-22-2013
20100162686HYBRID VEHICLE AND METHOD FOR CONTROLLING SAME - A hybrid vehicle including an engine, a generator capable of generating power by being driven by the engine, an electric motor capable of running on power supplied from the generator, a power split device that transmits output from the engine to a driving wheel and the generator and also transmits output from the electric motor to the driving wheel, and a main ECU that controls an output ratio of the engine and an output ratio of the electric motor using the power split device according to the running state of the vehicle. When the operating mode of the engine is switched between a lean burn operating mode and a stoichiometric burn operating mode, the main ECU selectively increases and decreases the output ratio of the electric motor so that the total output, which is the combined output of the engine and the electric motor, is constant.07-01-2010
20100186372METHOD FOR REGENERATING A PARTICULATE FILTER OF AN INTERNAL-COMBUSTION ENGINE - A method for regenerating a particulate filter of an internal-combustion engine, provides for air to be supplied into the exhaust gas pipe upstream of the particulate filter in order to perform post-combustion in the exhaust gas pipe. The method provides for fuel to be supplied to the cylinders of the internal-combustion engine by means of a high-pressure pumping unit, and for fuel to be supplied into the exhaust pipe upstream of the particulate filter by means of the high-pressure pumping unit.07-29-2010
20100186371Method for Operating an Exhaust-Gas Catalytic Converter of an Internal Combustion Engine - Method and apparatus for operating an exhaust-gas catalytic converter (07-29-2010
20120102925ENGINE EXHAUST TEMPERATURE REGULATION - In one example, a method of operating an engine in a vehicle is described. The method comprises delivering a first substance to a cylinder of the engine from a first injector; delivering a second substance to the cylinder of the engine from a second injector, where the second substance has a greater heat of vaporization than the first substance; and increasing injection of the second substance responsive to an exhaust over-temperature condition.05-03-2012
20120102924Method And Device For Measuring The Soot Load In The Exhaust Gas Systems Of Diesel Engines - A method and device for measuring the soot load in the exhaust gas systems of diesel engines using a sensor which is mounted downstream of a particulate filter and comprises a sensor element, to measure the operability of the particulate filter. According to the method, the soot load of the sensor element is measured resistively or capacitively using electrodes. The measuring voltage of the sensor element is controlled depending on at least one actual operating parameter of the diesel engine.05-03-2012
20120102923AFTER-TREATMENT HEATING WITH ENGINE COMBUSTION FEEDBACK - A method of operating an engine having an after-treatment system that treats exhaust gas from the engine with an oxidation catalyst includes adjusting the operation of the engine to increase the temperature of the exhaust gas, continuously sensing a cylinder pressure with a pressure sensor disposed at at least one cylinder of the engine to identify a unstable combustion event, i.e., an engine misfire, and adjusting the operation of the engine to prevent a future unstable combustion event when the unstable combustion event is detected.05-03-2012
20120102921SYSTEM AND METHOD FOR CONTROLLING REGENERATION OF AN EXHAUST AFTER-TREATMENT DEVICE - A method for controlling regeneration of an exhaust after-treatment device for an internal combustion engine in a vehicle includes establishing a baseline value for a mass of soot collected in the exhaust after-treatment device. The baseline value is a threshold mass of soot to be reached for regenerating the filter, and is determined as a function of a speed of the engine and a quantity of fuel entering the engine. The method also includes modifying the baseline value in response to an engine operating parameter that alters a fuel-air ratio of a combustible mixture entering the engine to generate a modified baseline value. The method additionally includes regenerating the exhaust after-treatment device using the modified baseline value. A system for controlling regeneration of an exhaust after-treatment device for an internal combustion engine is also provided.05-03-2012
20120102920POWER SYSTEM WITH CYLINDER-DISABLING STRATEGY - A power system for use with an engine having at least one cylinder, and a piston, a fuel injector, and an exhaust valve associated with the at least one cylinder, is disclosed. The power system may have an exhaust passage, an aftertreatment component disposed within the exhaust passage, and a valve actuator configured to selectively move the exhaust valve. The power system may also have a controller in communication with the fuel injector and the valve actuator. The controller may be configured to make a determination to heat the aftertreatment component, to activate the valve actuator to hold open the exhaust valve as the piston moves through a top-dead-center position to disable the at least one cylinder based on the determination, and to activate the fuel injector to inject fuel into the at least one cylinder while the at least one cylinder is disabled.05-03-2012
20100257843Zoned Catalysts for Diesel Applications - An oxidation catalyst composite, methods and systems for the treatment of exhaust gas emissions from an advanced combustion engine, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) from a diesel engine and an advanced combustion diesel engine are disclosed. More particularly, washcoat compositions are disclosed comprising at least two washcoat layers, a first washcoat comprising a palladium component and a second washcoat containing platinum and at least about 50% of the total platinum is located in the rear of the catalyst.10-14-2010
20100257842METHOD FOR DETECTING THE MINIMUM OPENING TIME OF A REDUCING AGENT FEED DEVICE IN AN EXHAUST GAS AFTERTREATMENT SYSTEM COMPRISING AN SCR CATALYST - In a method for adapting the reducing agent feed in an exhaust gas aftertreatment system having an SCR catalyst for removing nitrogen oxides from the exhaust gas of an internal combustion engine and at least one reducing agent feed device, the minimum opening time of the reducing agent feed device is determined during operation and while suspending nitrogen emission, carrying out the following steps: a) the opening time of the reducing agent feed device is gradually prolonged until b) a reducing agent-sensitive sensor in the exhaust gas aftertreatment system detects a reducing agent signal. An exhaust gas aftertreatment system is designed accordingly for carrying out the method and a device is designed for controlling an exhaust gas aftertreatment system.10-14-2010
20100186373Exhaust Heating for Gensets - An electric power system includes a genset with an electric power generator, an internal combustion engine driving the electric power generator, and an electric heating device. This device may be used to selectively regenerate an exhaust treatment subsystem and/or to otherwise selectively increase load on the engine. In one application, the system is carried by a vehicle propelled by another engine. In another application, the system is structured to provide back-up power to an AC power bus, and is typically stationary.07-29-2010
20120031076METHOD AND DEVICE FOR REGENERATING A PARTICLE FILTER - A method for the targeted initiation of a regeneration of a particle filter in an exhaust-gas duct of an internal combustion engine which has a catalytic converter downstream of the particle filter in the flow direction of the exhaust gas, the regeneration of the particle filter taking place by means of an oxidative burn-off of the particles during the regeneration phase.02-09-2012
20100212292Assembly and Method for Introducing a Reducing Agent into the Exhaust Pipe of an Exhaust System of an Internal Combustion Engine - An assembly and method for introducing a reducing agent into an exhaust pipe of an exhaust system of an internal combustion engine, in particular of a motor vehicle includes a feed connector which opens into the exhaust pipe and has a wall; a feed device for reducing agents which opens into the feed connector; and a device that generates a gas flow which is additional to the reducing agent flow and lines the wall of the feed connector.08-26-2010
20100212291METHOD AND DEVICE FOR REGULATING THE FUEL/AIR RATIO OF A COMBUSTION PROCESS - A method for regulating the fuel/air ratio of a combustion process which is operated alternatingly with excess air and air deficiency, and having at least one catalyst volume in the exhaust gas of the combustion process which stores oxygen when there is excess oxygen in the exhaust gas and gives it off when there is oxygen deficiency, in which method the oxygen charges into the catalyst volume taking place when there is excess air, and the oxygen discharges from the catalyst volume taking place when there is air deficiency determined, and in which the fuel/air ratio is regulated in a first control loop such that the sum of the oxygen charges and oxygen discharges determined in a predefined interval takes on a predetermined value, wherein the combustion process is operated using oxygen excess or oxygen deficiency, respectively, at least until these appear at an oxygen-sensitive Nernst probe downstream from the catalyst volume.08-26-2010
20100223907Method For Adjusting the Metered Quantity of Reducing Agent For Selective Catalytic Reduction - A method for application in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operated with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and during the operation of the internal combustion engine varies the metered quantity during certain operating phases and compares the change in the measured value of at least one NO09-09-2010
20090025367Physical based LNT regeneration strategy01-29-2009
20090044514Particulate Filter Regeneration - In one example, a method of operating an engine having a diesel particulate filter in a vehicle, the particulate filter having a length and depth, includes performing particulate filter regeneration in response to temperature variation across the length and/or depth of the particulate filter.02-19-2009
20100212289REGENERATION CONTROL METHOD FOR A PARTICLE FILTER - A regeneration control method for a particle filter of an internal combustion engine exhaust line determines operating data items of the particle filter, wherein the data items are at least one representative inside temperature T(t) of the filter at a time t, regenerates the filter by increasing the temperature thereof above a first combustion temperature threshold of a soot contained in the filter, and computes a time-varying parameter d08-26-2010
20100236219ENGINE-OFF AMMONIA VAPOR MANAGEMENT SYSTEM AND METHOD - A method of managing vapors generated from an ammonia-containing reductant delivery system for a vehicle is described. The method may include storing ammonia containing vapors generated in the reductant delivery system during engine-off and then purging said stored ammonia into an exhaust of the engine to react in a catalyst in the exhaust flow during engine operation.09-23-2010
20100236220EXHAUST EMISSION PURIFYING APPARATUS FOR ENGINE - A technology for purifying an exhaust emission from an engine is provided, in which a misjudgment caused by a time lag between the abnormality detection and an abnormality judgment is avoided, in the case where a plurality of abnormalities is judged on the aqueous solution of a reducing agent or the like. After a first abnormality judgment (Femp=1: the time t09-23-2010
20120192547DUAL AIR CIRCUIT FOR EXHAUST GAS TREATMENT - An exhaust treatment system for an engine includes a regeneration device being in receipt of exhaust from the engine and positioned upstream of a diesel particulate filter. A compressor provides a source of compressed air. An air/fuel nozzle is coupled to the regeneration device, in receipt of a fuel supply as well as the compressed air. The fuel and compressed air are forced through an orifice of the nozzle to atomize the fuel. A bypass line provides compressed air from the compressor to the regeneration device without passing through the orifice of the nozzle. A valve is operable to allow compressed air to flow through the bypass line when a predetermined condition exists.08-02-2012
20100205935REDUCING COOKING OVER Ag/Al2O3 HC-SCR CATALYST - The present invention relates to a method of reducing coking over a AgZAl08-19-2010
20090277156Tank For A Reducing Agent, Motor Vehicle Having A Tank For A Reducing Agent And Method For Operating An SCR System Of A Motor Vehicle - A tank for a reducing agent which forms ammonia or which includes ammonia, has a planar first tank volume and at least one elongate second tank volume. A motor vehicle has an internal combustion engine, an exhaust system with an SCR catalytic converter and a reducing agent metering device and a body with a roof. A tank with a planar first tank volume for the reducing agent is provided on the roof. A method for operating an SCR system of a motor vehicle which has at least two tank volumes, a reducing agent metering device and an SCR catalytic converter, is also provided.11-12-2009
20110056187METHOD FOR DECREASING NITROGEN OXIDES IN HYDROCARBON-CONTAINING EXHAUST GASES USING AN SCR CATALYST BASED ON A MOLECULAR SIEVE - The invention relates to a process for treating diesel engine exhaust gases comprising nitrogen oxides (NO03-10-2011
20110056186Exhaust Gas Purification Device - A method for controlling an exhaust gas purification device 03-10-2011
20110099978REDUCTANT DECOMPOSITION SYSTEM - Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber. The reductant injector is communicable in reductant injecting communication with exhaust gas within the chamber.05-05-2011
20110099977EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification apparatus includes an exhaust passage through which exhaust gas discharged from an engine flows, a selective catalytic reduction catalyst provided in the exhaust passage, a urea water supply device for supplying urea water into the exhaust passage upstream of the selective catalytic reduction catalyst, a sensor responding to respective quantities of NOx and ammonia downstream of the selective catalytic reduction catalyst and detecting a value based on the response by the sensor, an exhaust gas recirculation passage through which a part of exhaust gas is refluxed to an intake system of the engine, an exhaust gas recirculation control valve for controlling amount of exhaust gas that is refluxed through the exhaust gas recirculation passage and a control device for controlling quantity of urea water supplied from the urea water supply device to the exhaust passage and also opening and closing of the exhaust gas recirculation control valve. The control device controls opening and closing of the exhaust gas recirculation control valve so as to increase or decrease the amount of exhaust gas refluxed through the exhaust gas recirculation passage for a predetermined period of time and also determines quantity of urea water based on change between the values detected by the sensor before and after changing opening and closing of the exhaust gas recirculation control valve.05-05-2011
20110099976EXHAUST SYSTEM - An exhaust system, may include a trapping filter, a nitrogen oxide purification catalyst to eliminate nitrogen oxide of the exhaust gas, an injector that selectively injects fuel in the exhaust line, a fuel cracking catalyst that is disposed between the injector and the trapping filter at the exhaust line, transforms the injected fuel to a reducing agent, and a control portion that controls the injector to inject a predetermined amount of the fuel for a predetermined time period so as to raise the temperature of the trapping filter to a predetermined regeneration temperature and eliminate the particulate material trapped in the trapping filter, wherein the control portion detects a degradation rate of the fuel cracking catalyst, and varies the predetermined regeneration temperature of the trapping filter depending on the degradation rate.05-05-2011
20110099974REDUCTANT SPRAY INJECTOR BOSS - A mounting boss (05-05-2011
20100218484METHOD AND DEVICE FOR CONTROLLING AN SCR-EXHAUST GAS AFTER-TREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for controlling an SCR-exhaust gas after-treatment system (09-02-2010
20090107111Implo-Dynamics.TM.: a system, method, and apparatus for reducing airborne pollutant emissions and/or recovering energy - Methods, systems, and apparatus for reducing or eliminating airborne pollutants and generating a measure of usable energy from the same are provided. The Implo-Dynamics™ Treatment System includes several embodiments for mixing steam and emissions and injecting said mixture into a process fluid transmission network. The vacuum induced flow of the Working Fluid provides a means of propelling a Hydro Turbine unit for energy recovery purposes. The process includes reactant injection, gas transfer, filtration, remediation of pollutants, and delivers a novel means for carbon dioxide capture and sequestration. Furthermore, the detoxified process by-product solids represent a beneficial reutilization and/or recycling resource. The methods and systems of the present invention include a comprehensive arrangement of process configurations and components as well as a means of operation.04-30-2009
20090139208METHOD FOR PREPARING A POROUS STRUCTURE USING SILICA-BASED PORE-FORMING AGENTS - The invention relates to a process for manufacturing a porous silicon carbide structure of the honeycomb type, said process being characterized in that it comprises the following steps: forming of a paste from a mixture of silicon carbide grains, the diameter d06-04-2009
20120192548SYSTEM AND METHOD FOR MONITORING REDUCTANT QUALITY - A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system, comprising of correlating a change in a monitored operating condition with a refill event to determine whether a reductant-diluting substance has been added to the reductant storage system; and limiting vehicle operation based on the correlation.08-02-2012
20080229729CONTROL STRATEGY FOR LEAN NOx TRAP REGENERATION - A method for controlling regeneration of a lean NOx trap includes estimating an accumulated NOx in the lean NOx trap; determining whether the estimated NOx exceeds a first threshold value or a second threshold value; estimating the temperature of the lean NOx trap; determining whether the estimated temperature exceeds a threshold temperature; determining a desired air-fuel ratio for initiating a regeneration event, the desired air-fuel ratio being determined based upon the estimated NOx and the estimated temperature of the lean NOx trap; hastening the occurrence of a regeneration event when the estimated NOx exceeds the first threshold value through active control of engine operating regimes; and initiating a regeneration event when the estimated NOx exceeds the second threshold value or when the estimated temperature exceeds the threshold temperature by forcing homogenous operation of the engine at the desired air-fuel ratio.09-25-2008
20090071123PARTICLE FILTER ASSEMBLY - A particle filter assembly adapted to be mounted in an exhaust gas stream of an internal combustion engine. The particle filter assembly includes a wire mesh filter or sinter metal filter having a mesh size sufficiently small to prevent the passage of carbonaceous particles above a predetermined size through the mesh. The filter is positioned in series with the exhaust gas stream from the engine. A source of electrical power is electrically connected to the filter to heat the filter to a temperature sufficient to oxidize the carbonaceous material in the filter to carbon dioxide.03-19-2009
20100300071METHOD AND CONTROL DEVICE FOR CONTROLLING A REGENERATION PROCESS OF AN EXHAUST GAS PARTICLE FILTER - The invention relates to a method (12-02-2010
20100300069CONTROL OF A MOTOR VEHICLE INTERNAL COMBUSTION ENGINE - The present invention relates to a method for operating a motor vehicle internal combustion engine having a controller for adjusting NOx emissions in the exhaust gas, wherein a NOx controller is combined with a combustion controller. A control unit of an internal combustion engine is further proposed, said control unit comprising first control means for performing cylinder pressure-based combustion control, and second control means for performing NOx control, wherein the first and second control means are linked to each other.12-02-2010
20110126518Method for matching a particle filter temperature adjustment - The invention relates to a method for adjusting the temperature of a particle filter of an exhaust line (06-02-2011
20110126517CATALYST DETERIORATION DIAGNOSIS SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE - A catalyst deterioration diagnosis system performs a diagnosis of deterioration of the oxidation catalyst based on a high-temperature-inflow-condition exhaust gas temperature and a low-temperature-inflow-condition exhaust gas temperature. The high-temperature-inflow-condition exhaust gas temperature is a temperature detected by a temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a high temperature region H while the reducing agent is supplied from the reducing agent supply means into the exhaust gas that flows into the oxidation catalyst. The low-temperature-inflow-condition exhaust gas temperature is a temperature detected by the temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a low temperature region L while the reducing agent is supplied from a reducing agent supply means into the exhaust gas that flows into the oxidation catalyst.06-02-2011
20110126516System and Method for Removing Particulate Matter from a Diesel Particulate Filter - A system is provided for removing particulate matter from a particulate filter, which includes at least one particulate filter unit. The system includes an engine controller coupled to each sensor and the engine, and a locomotive controller coupled to the engine controller. Each sensor continuously outputs a first alert signal to the engine controller, including the current load and the loading rate of one or more particulate filter units. The engine controller determines a projected load and projected loading rate of the one or more particulate filter units along the route, and a time gap or distance gap based on the trip plan along the route until the one or more particulate filter units are fully loaded. Additionally, the engine controller determines a time region or distance region within the respective time gap or distance gap filter unit, based on at least one of the current load, the loading rate, the projected load, the projected loading rate, and the time region or distance region.06-02-2011
20110126515SENSOR-INTEGRATED DEVICE - The invention relates to a device for the qualitative and/or quantitative determination of at least one component of a chemically reducible gas mixture, an exhaust gas catalytic converter utilizing such a device, a vehicle including such a catalytic converter, a process for preparing such a device, a process for monitoring the NO06-02-2011
20110000191EXHAUST GAS TREATMENT SYSTEM AND METHOD - In one aspect, the invention is directed an exhaust gas treatment apparatus that can be used to treat exhaust gas streams from vehicles having gasoline engines or diesel engines, from manufacturing plants, from incineration facilities, from coal fired stations, natural gas turbines or from virtually any exhaust gas stream. In one embodiment, the invention includes a particulate matter remover, a heat exchanger, a first reactor, a second reactor and a reagent protection device for preventing communication of reagent in the second reactor with ambient air.01-06-2011
20110214412EXHAUST SYSTEM COMPRISING NOx STORAGE CATALYST AND CSF - An exhaust gas aftertreatment system for a diesel-engined vehicle, which system comprising a NO09-08-2011
20120067028AFTERTREATMENT CATALYST DEGRADATION COMPENSATION - One embodiment is a method including providing an aftertreatment catalyst disposed in an exhaust stream of an internal combustion engine and a reductant that reacts with an amount of NOx in the exhaust stream in the presence of the aftertreatment catalyst. The method includes interpreting a catalyst degradation value corresponding to the aftertreatment catalyst, and interpreting a nominal reductant value. The method further includes determining an adjusted reductant value in response to the catalyst degradation value and the nominal reductant value, and injecting the reductant into the exhaust stream at a rate based on the adjusted reductant value.03-22-2012
20120031074METHOD AND DEVICE FOR REGENERATING A PARTICLE FILTER - A method and device for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine which has a three-way catalytic converter downstream of the particle filter, wherein the particle filter is regenerated by oxidative burning of the particles during a regeneration phase, wherein oxygen consumption is balanced, directly or indirectly, during the regeneration phase via the temporal variation of a first signal of a first lambda probe, which is arranged upstream of the particle filter, in comparison to the temporal variation of a second signal of a second lambda probe, which is arranged downstream of the particle filter. A lambda value of λ=1 is set downstream of the three-way catalytic converter during the regeneration of the particle filter by means of lambda control and the second lambda probe which is arranged downstream of the three-way catalytic converter.02-09-2012
20110016848SYSTEM AND METHOD FOR TREATING DIESEL EXHAUST GASES - A system for treating diesel exhaust gases includes an engine for producing a diesel exhaust stream, a diesel particulate filter downstream of the engine and adapted to remove particulates from the exhaust stream, a heater upstream of the filter adapted to deliver energy in sufficient amounts to the exhaust stream to cause active regeneration of the filter, and a diesel oxidation catalyst upstream of the heater adapted to cause passive regeneration of the filter when the exhaust stream is above a light-off temperature of the diesel oxidation catalyst. A NOx reduction catalyst can be provided downstream of the heater. Methods for treating diesel exhaust gases are also disclosed.01-27-2011
20110000190METHOD AND APPARATUS FOR NO2-BASED REGENERATION OF DIESEL PARTICULATE FILTERS USING RECIRCULATED NOX - In a method for performing NO2-based regeneration of a diese! particulate filter (DPF) using recirculated NOx, the DPF is regenerated by oxidizing soot in the DPF with NO2 so that CO, CO2, and NO are formed, at least some NOx is recirculated from a takeoff point to a point upstream of the takeoff point. NO2 can be formed by reacting the recirculated NO with 02. During regeneration of the DPF, at least some of the NO2 that oxidizes soot in the DPF is recirculated ISI 02 or formed from recirculated NO that is reacted with 02 to form NO2. An exhaust aftertreatment system for performing NO2-based regeneration of a diesel particulate filter (DPF) using recirculated NOx is also disclosed.01-06-2011
20110030343SCR REDUCTANT DEPOSIT REMOVAL - An engine exhaust aftertreatment system including a selective catalytic reduction (SCR) system. The SCR system includes a reductant injection system configured to introduce a reductant into a exhaust stream of a engine, a SCR catalysts configured to reduce NOx in the presence of a reductant, and a SCR monitoring system configured to determine temperatures associated with the SCR system. The SCR system also includes a heat source configured to raise the temperature of the exhaust stream and a controller configured to operate the heat source to reach exhaust stream temperatures in the SCR system of at least about 400 degrees Celsius based on the temperature associated with the SCR system.02-10-2011
20110030344RADIANT HEATING SYSTEMS AND METHODS FOR CATALYSTS OF EXHAUST TREATMENT SYSTEMS - An exhaust treatment system comprises M three-way catalysts and N electrically heated catalysts (EHCs). The M three-way catalysts are arranged to receive exhaust gas output by an engine of a hybrid vehicle. M is an integer greater than one. The N EHCs are arranged to receive the exhaust gas and provide radiant heat to the M three-way catalysts when the N EHCs are powered. N is an integer greater than one.02-10-2011
20110030345METHOD FOR REDUCING NITRIC OXIDE IN THE EXHAUST GAS FLOW OF INTERNAL COMBUSTION ENGINES - A method is described for reducing nitrogen oxides in the exhaust gas flow of combustion engines, especially a motor vehicle internal combustion engine, wherein an air/fuel mixture in the combustion chamber of the combustion engine is combusted in the presence of a fuel additive and, in the process, the fuel additive decomposes and the exhaust gas flow is guided through at least one catalyst arranged downstream of the combustion chamber. This method is characterised in that a fuel additive is used, which decomposes in the combustion chamber releasing ammonia and the exhaust gas flow containing ammonia is guided through at least one SCR catalyst arranged downstream of the combustion chamber to reduce the concentration of the nitrogen oxides contained therein. The method according to the invention is highly effective in reducing the nitrogen oxide content in the exhaust gas flow of a combustion engine without an exhaust gas aftertreatment system having to be expensively formed and the installation space having to be increased.02-10-2011
20120266584EXHAUST TREATMENT SYSTEM - An exhaust treatment system for a power system is disclosed. The exhaust treatment system includes an exhaust conduit directing exhaust gas produced by the power system towards at least one exhaust treatment device. The exhaust treatment system may also include a substrate positioned within an enclosure of the at least one exhaust treatment device. The exhaust conduit may be configured to preheat the substrate with the exhaust gas prior to directing the exhaust gas into the enclosure.10-25-2012
20130152551METHOD AND APPARATUS FOR DECREASING FUEL COMSUMPTION DURING PARTICULATE FILTER GENERATION - A diesel particulate filter system comprising: a temperature sensor on the inlet side of the diesel particulate filter; a temperature sensor on the outlet side of the diesel particulate filter; a pressure sensor on the inlet side of the diesel particulate filter; and a control module in communication with the temperature sensors and the pressure sensor, and the control module is loaded with a look-up table that correlates the amount of soot loaded in the diesel particulate filter to a change in pressure measured by the pressure sensor; wherein the control module Initiates a regeneration cycle when soot loading of the diesel particulate filter achieves a predetermined soot load.06-20-2013
20110239623REGENERATION STRATEGY FOR ENGINE EXHAUST - A method of regenerating a particulate filter of an exhaust system of an engine system is disclosed. The method may include determining a condition indicative of an accumulation of hydrocarbons in the particulate filter, and monitoring the particulate filter to determine when to initiate regeneration of the particulate filter. The method may also include selecting a regeneration profile for regeneration of the particulate filter based on the determined condition, and regenerating the particulate filter in accordance with the regeneration profile.10-06-2011
20110239626Diesel Particulate Control - A method and apparatus are provided for reducing emissions of particulates from diesel engines. Exhaust is passed through a diesel particular filter having at least two stages comprised of (a) a catalyst section having a platinum group metal catalyst on contact surfaces within the catalyst section and (b) a filter section comprised of passages effective to remove particulates from a moving stream of combustion gases generated by combusting the fuel in the engine and holding them therein to permit their oxidation. Carbon removal is enhanced by utilizing levels of platinum group metal composition, cerium compositions, fuels and/or optional chemical enhancers to generate NO10-06-2011
20110239624APPARATUS AND METHOD FOR REGENERATING AN EXHAUST FILTER - An exhaust gas treatment system for an internal combustion engine comprises an exhaust gas conduit in fluid communication with the internal combustion engine to conduct the exhaust gas between a plurality of exhaust treatment devices. A hydrocarbon injector in fluid communication with the exhaust gas delivers hydrocarbon thereto. A selective catalyst reduction device is disposed downstream of the hydrocarbon injector and is configured to receive and mix the hydrocarbon and exhaust gas and to reduce components of NO10-06-2011
20110239622EMISSION TREATMENT SYSTEM AND METHOD OF OPERATION - An emission treatment system is provided. The emission treatment system comprises a separation system and a selective catalytic reduction (SCR) catalyst. The separation system comprises a separator, a fuel inlet disposed to supply fuel to the separator, a first fuel outlet and a second fuel outlet respectively disposed to carry away fuel from the separator. The SCR catalyst comprises a catalyst composition comprising silver and templated metal oxide substrate. The emission treatment system is designed such that the separation system is configured to be in fluid communication with the SCR catalyst through the first fuel outlet during operation. A system including the emission treatment system and a combustion engine is also provided. Method of increasing NOx reduction efficiency of the SCR catalyst using fuel fraction is discussed.10-06-2011
20110239625METHOD AND DEVICE FOR ADAPTING THE INJECTION AGENT SUPPLY IN AN INJECTION SYSTEM, AND EXHAUST GAS AFTERTREATMENT SYSTEM - In a method and a device for adapting the injection agent supply for an emission control system, the following steps are carried out: a) setting of a agent pressure target value in the line upstream of the pump in relation to the ambient pressure; b) opening of the pressure relief valve for a predetermined time t; c) determining the pressure difference between the target and the injection agent pressure, caused in step b), immediately after step b); d) setting a target value for the agent pressure in the line downstream of the pump in relation to the exhaust gas pressure in the system; e) opening of the injector for a predetermined time t; f) determining the pressure difference between the target and the agent pressure, caused in step e), immediately after step e); g) comparing the pressure differences from steps c) and f); and h) optional adaptation of the injector opening time.10-06-2011
20110247317CATALYST TEMPERATURE ESTIMATING DEVICE AND CATALYST TEMPERATURE ESTIMATING METHOD - A catalyst temperature estimating device that estimates the temperature of an upstream end of a catalyst for purifying exhaust gas of an internal combustion engine in an exhaust gas flow direction by executing a smoothing process for upstream end temperature estimation; the temperature of a downstream end of the catalyst in the exhaust gas flow direction by executing either a downstream end temperature estimation process using the estimated upstream end temperature with a smoothing process for downstream end temperature estimation; and calculates a smoothing coefficient for the estimated downstream end temperature used to smooth the estimated downstream end temperature based on the operation state of the internal combustion engine.10-13-2011
20090031702Particulate filter - A filter includes a housing including an inlet and an outlet, and the housing includes a first section and a second section. The filter also includes a plurality of parallel channels defined by a plurality of porous walls within the first and second sections of the housing. The plurality of channels extend between the inlet and the outlet. The plurality of channels in the first section of the housing includes at least one first channel including an inlet stopper and at least one second channel including an outlet stopper. The plurality of channels in the second section of the housing including at least one open channel.02-05-2009
20100064662DIESEL CATALYST SYSTEM - A selective catalytic reduction system for reducing nitric oxides emission levels from a compression ignition engine includes a first reductant injector located upstream a first catalyst including a selective catalytic reduction coating. A second reductant injector is located downstream the first catalyst; and a second catalyst is placed downstream the second reductant injector and includes a selective catalytic reduction coating.03-18-2010
20120240552METHOD OF OPERATING AN EXHAUST GAS TREATMENT SYSTEM TO PREVENT QUENCHING DURING REGENERATION - A method of controlling an exhaust gas treatment system of a vehicle includes detecting a request to regenerate a particulate filter, and injecting hydrocarbons at an injection rate into a flow of exhaust gas upstream of an oxidation catalyst to heat the oxidation catalyst. The injection rate is increased at a current acceleration rate, and the current acceleration rate is reduced to define a reduced acceleration rate when the oxidation catalyst is quenched.09-27-2012
20120240553METHOD OF DETERMINING IF AN OXIDATION CATALYST IS QUENCHED OR IS NOT QUENCHED - A temperature of exhaust gas downstream of an oxidation catalyst is compared to a temperature of the exhaust gas upstream of the oxidation catalyst to determine if the downstream temperature is increasing over time or decreasing over time as hydrocarbons are injected into the flow of exhaust gas to regenerate a particulate filter. The oxidation catalyst is determined to be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst remains constant or decreases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases. The oxidation catalyst is determined to not be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst increases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases.09-27-2012
20120144803Method Of Operating A Fuel Processor Intermittently - In situations where the demand for syngas is intermittent, a fuel processor is operated to provide a high absolute hydrogen and carbon monoxide production, rather than to give a high fuel-specific hydrogen and carbon monoxide production. When a syngas generator is operated to intermittently produce syngas, a heating process can be performed between periods of syngas demand in order to keep the fuel processor within a desired temperature range. The heating process can comprise various steps or events including performing a heating event, allowing a standby period, and/or performing a carbon conversion event. Carbon formed during the process of converting fuel to syngas can be advantageously converted to maintain the temperature of the fuel processor within a desired range in between periods of syngas demand. A predictive method can be employed to control at least a portion of the heating process.06-14-2012
20110099979Composition and Method for Reducing NOx Emissions From Diesel Engines at Minimum Fuel Consumption - A diesel fuel composition is disclosed, as well as a method for reducing NOx emissions from a diesel engine at minimum fuel consumption wherein the diesel engine operates in a low temperature combustion mode, comprising the step of adding to the diesel engine at least one diesel fuel or blending component for a diesel fuel having a combination of a low T50 in the range of from 190° C. to 280° C., a high cetane number in the range of from 31 to 60, and an effective emissions reducing amount of a nitrogen-free cetane improver.05-05-2011
20110072783SYSTEM AND METHOD FOR REGENERATING A PARTICULATE FILTER ACCOMPANIED BY A CATALYST - A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst.03-31-2011
20110173953System And Method For Regenerating An Engine Exhaust After-Treatment Device - A system and method for regenerating a device in an engine exhaust after-treatment system is provided. To regenerate the device, a syngas stream is introduced into the engine exhaust stream and combusts in the presence of a catalyst in the after-treatment system, raising the temperature. A supplemental liquid fuel stream is then selectively introduced into and is vaporized by the syngas stream to form a combined fuel stream. Combustion of the combined fuel stream with the engine exhaust in the presence of the catalyst further heats the device bringing it to a temperature suitable for regeneration. The catalyst can be upstream of or within the device being regenerated.07-21-2011
20110173952METHOD FOR OPERATING POST INJECTIONS OF FUEL IN AN INTERNAL COMBUSTION ENGINE - A method is provided for operating an engine. The engine is configured to post inject a quantity of fuel into a combustion chamber and includes, but is not limited to a Diesel Oxidation Catalyst (DOC) that has an inlet and an outlet. The method includes, but is not limited to determining an open loop post injection quantity q07-21-2011
20110173950Emissions Treatment System with Ammonia-Generating and SCR Catalysts - Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.07-21-2011
20120031073Supply arrangement for supplying an exhaust gas system with a solution including a reduction agent, an internal combustion engine, a generator uint and a method as well as a control arrangement therefor - In a supply arrangement for supplying a solution containing a reducing agent, in particular urea, to an exhaust gas system of an internal combustion engine wherein a supply line extending from a storage tank to an injector which is connected to the exhaust gas system includes an operating tank and a dosing arrangement, a return line extends between the dosing arrangement and the storage tank and the dosing arrangement includes a directional valve for directing solution to the injector during a first operating mode in which the engine is operating and, in a second operating mode in which the engine is shut down, directing the solution back to the storage tank for emptying the operating tank.02-09-2012
20110078997Four-Way Diesel Catalysts and Methods of Use - Provided are catalyst articles, emission treatment systems and methods for simultaneously remediating the carbon monoxide, nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system of specific embodiment effectively treats diesel engine exhaust with a single catalyst article.04-07-2011
20110078998METHOD FOR OPERATING AN EXHAUST GAS AFTERTREATMENT APPARATUS - The present invention relates to a method for operating an exhaust gas aftertreatment apparatus (04-07-2011
20110099980Method for Controlling Exhaust Gas Purification Device - Disclosed is a method for controlling an exhaust gas purification device, wherein the regeneration operation includes main regeneration operation for detaching the nitrogen oxides adsorbed onto the nitrogen oxide adsorbing material, the method comprising: operating the first combustion device and the second combustion device while the exhaust gas is prevented from flowing into the branch exhaust passage subjected to the regeneration operation by the switching of a changeover valve during the regeneration operation; and decreasing the flow rate of the first mixture gas as the stage of the main regeneration operation advances.05-05-2011
20110099981PROCEDURE AND DEVICE FOR CONTROLLING AN EXHAUST GAS PURIFICATION SYSTEM - A procedure for controlling an exhaust gas purification system of a combustion engine, consisting of one or several catalytic converters for converting and/or storing at least one exhaust gas component of an exhaust gas of the combustion engine at least one of the catalytic converters is construed as oxidization catalytic converter. With the aid of the adsorption capability of at least partially uncombusted hydrocarbons of one of the catalytic converters a diagnosing forecast about the NO oxidization of the catalytic converters is derived, whereby the at least partially uncombusted hydrocarbons are introduced into the exhaust gas duct at least partially in front of the catalytic converter. With the procedure and the device for implementing the procedure the NO oxidization capability of the involved catalytic converters can be evaluated in the range of extended on-board diagnosis requirements to provide “feed-gas” for subsequent exhaust gas after-treatment systems.05-05-2011
20110072784SYSTEM AND METHOD FOR REGENERATING A PARTICULATE FILTER - A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst.03-31-2011
20110067382SYSTEM AND METHOD FOR NOX REDUCTION OPTIMIZATION - An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected.03-24-2011
20110247316METHOD OF CONTROLLING UREA DOSING IN AN EXHAUST SYSTEM OF A VEHICLE - The present application relates to a method of controlling urea dosing in an exhaust system of a vehicle. The method includes adjusting the urea dosing based on the severity of urea deposition on an SCR catalyst, where the urea dosing is reduced as the severity increases.10-13-2011
20110061366SYSTEM FOR EXHAUST GAS PURIFICATION AND METHOD OF CONTROLLING THE SAME - A system for exhaust gas purification (03-17-2011
20110056185Vehicle Reduced Emission Deployment - A reduced emission apparatus is coupled to a vehicle such that the vehicle is enabled to operate in a reduced emission mode by use of the reduced emission apparatus. A data acquisition apparatus is mounted on the vehicle and configured to acquire data relating to operation of the vehicle. Security may be provided for the reduced emission apparatus and vehicle-mounted data acquisition apparatus. The credits from operating the reduced emission apparatus apply to resources for deploying the reduced emission apparatus.03-10-2011
20110047970HIGH EFFICIENCY NOx REDUCTION SYSTEM AND METHOD - An exhaust gas stream aftertreatment system and method achieves high efficiency NOx reduction in exhaust gas emissions by arranging a selective catalytic reduction (SCR) catalyst element upstream from a NOx adsorber catalyst. In an exemplary embodiment, a reductant is introduced into the exhaust gas stream, exposing the exhaust gas stream containing the reductant to a selective catalytic reduction (SCR) catalyst element, and exposing the exhaust gas stream that was exposed to the SCR catalyst element to a NOx adsorber catalyst element. The NOx adsorber catalyst element can be regenerated by temporarily reducing an oxygen concentration in an exhaust gas stream to reduce the λ of the exhaust gas stream. While the oxygen concentration is reduced, reductant is introduced into the exhaust gas stream at a rate that achieves a fuel-rich condition, and the fuel rich exhaust stream is exposed to the NOx adsorber catalyst element.03-03-2011
20110047974EXHAUST FLOW SEGREGATOR AND ASSOCIATED SYSTEMS AND METHODS - According to one embodiment, an exhaust gas after-treatment apparatus includes an exhaust tube through which a main exhaust gas stream is flowable. The exhaust tube defines an exhaust flow channel. The apparatus also includes an exhaust flow segregator positioned within the exhaust tube. The exhaust flow segregator separates the exhaust flow channel into a first channel through which a first portion of the main exhaust gas stream is flowable and a second channel through which a second portion of the main exhaust gas stream is flowable. Additionally, the apparatus includes an injector coupled to the exhaust tube. The injector is communicable in reductant injecting communication with the first portion of the main exhaust gas stream flowing through the first channel. The apparatus also includes at least one exhaust gas heater communicable in heat supplying communication with the first portion of the main exhaust gas stream flowing through the first channel.03-03-2011
20100293924CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE, AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE - A control for an internal combustion engine in which it is determined whether a request for a turbo flow mode is output and whether there is a possibility that a catalyst may be deactivated. More specifically, it is determined whether a catalyst gas temperature is above a predetermined value. The predetermined value is set in advance so that when the catalyst gas temperature is equal to or below the predetermined value, the catalyst is deactivated. When it is determined that there is a possibility that the catalyst may be deactivated if exhaust valves are placed in the turbo flow mode, a retard amount in an ignition timing retard correction is determined. An ignition timing is calculated. It is permitted to switch a valve opening mode to the turbo flow mode.11-25-2010
20130186072CONTROLLING HYDROCARBON INJECTION FOR FILTER REGENERATION - A method for providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter within an exhaust system of a diesel engine is provided. The diesel engine comprises an electronic control module, at least one cylinder, and at least one fuel injector in fluid communication with the at least one cylinder, and a diesel oxidation catalyst within the exhaust system. Temperature of a diesel oxidation catalyst output is monitored with an electronic control module. A total amount of hydrocarbons required for diesel particulate filter regeneration is calculated based upon the monitoring of the temperature of the diesel oxidation catalyst output. The total amount of hydrocarbons is injected into an exhaust system upstream of a diesel oxidation catalyst and at least one cylinder with a fuel injector as a post injection.07-25-2013
20130186063EXHAUST SYSTEM AND METHOD FOR CONTROLLING AN EXHAUST SYSTEM - In one exemplary embodiment of the invention, a method for controlling an exhaust system includes determining an air to fuel ratio within a combustion chamber of an internal combustion engine, measuring a temperature of an exhaust gas flow from the internal combustion engine into the exhaust system and determining a specific heat for the exhaust gas flow in a first segment of the exhaust system based on the temperature of the exhaust gas flow from the internal combustion engine and the air to fuel ratio, wherein the first segment is upstream of the particulate filter. The method also includes determining a first temperature of the exhaust gas in the first segment based on the specific heat for the exhaust gas flow and selectively controlling a regeneration process for the particulate filter using the determined temperature of the exhaust gas at the selected location.07-25-2013
20130186064Exhaust Aftertreatment for NOx-Containing Exhaust From an Internal Combustion Engine - A method of treating NOx-containing exhaust from an internal combustion engine. An exhaust aftertreatment system has the following devices arranged in the following order downstream the exhaust manifold: a lean NOx trap (LNT), a particulate filter (PF) and a selective reduction catalyst (SCR) device. At least the LNT is located in the engine compartment. The SCR temperature at the input to, or in, the SCR is monitored to determine whether the aftertreatment system is to be operated in a cold mode or warm mode. Only during warm mode is reductant provided to the SCR, and during warm mode the LNT is not regenerated.07-25-2013
20130186065SULFUR ACCUMULATION MONITORING SYSTEMS AND METHODS - A system for a vehicle includes a change determination module, a sulfur determination module, and a final equivalence ratio (EQR) module. The change determination module estimates a change in an amount of sulfur within a catalyst of an exhaust system of the vehicle. The sulfur determination module estimates the amount of sulfur within the catalyst based on the change. The final EQR module selectively adjusts fueling of an engine based on the amount of sulfur.07-25-2013
20130186066CATALYST DETERIORATION DETECTION APPARATUS AND METHOD - A technique which accurately detects the deterioration of an exhaust gas purification catalyst which is applied to an internal combustion engine capable of using gas fuel and liquid fuel. Where only the gas fuel is used which is difficult to cause the oxygen occluded in the exhaust gas purification catalyst to be released therefrom even if the air fuel ratio of exhaust gas discharged from the internal combustion engine is changed to a rich side, a catalyst deterioration determination part determines whether the exhaust gas purification catalyst has deteriorated, based on either one of a change in an output of an oxygen concentration detection part only at a lean side, and changes in the output of the oxygen concentration detection part at the rich side and at the lean side.07-25-2013
20110146238METHOD AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - In a method and apparatus for operating an internal combustion engine, a lambda control is carried out, in which a trim regulation is provided, which operates with a P regulator component and an I regulator component. To prevent overshooting when the trim regulation is carried out, operation takes place in a first mode with compulsory adjustment and in a following second mode with increased regulator amplification factors.06-23-2011
20100300070Systems And Methods For Controlling Temperature And Total Hydrocarbon Slip - Systems and methods for controlling temperature and total hydrocarbon slip in an exhaust system are provided. Control systems can comprise an oxidation catalyst, a particulate filter, a fuel injector, and a processor for controlling a fuel injection based on an oxidation catalyst model. Example system includes a virtual sensor comprising a controller for calculating and providing the total hydrocarbon slip to subsystems for after-treatment management based on modeling the oxidation catalyst. Example methods for controlling the temperature and the total hydrocarbon slip in an exhaust system include the steps of providing an oxidation catalyst model, monitoring a condition of the exhaust system, calculating a hydrocarbon fuel injection flow rate and controlling a fuel injection. The example methods further include the steps of determining an error in the oxidation catalyst model based on the monitored condition and changing the oxidation catalyst model to reduce the error.12-02-2010
20110209461SYSTEM, METHOD, AND APPARATUS FOR DETERMINING AFTERTREATMENT FLUID QUALITY - A method includes determining a first NO09-01-2011
20100287911EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification system which, in a wider temperature range, can reduce and remove nitrogen oxides in an exhaust gas by a reduction catalyst with the use of hydrogen as a reducing agent is provided. The exhaust gas purification system has an electronic control device (11-18-2010
20100275580DIESEL ENGINE EXHAUST AFTER-TREATMENT OPERATOR INTERFACE ALGORITHM - A motor vehicle operator interface and control algorithm convey diesel particulate filter regeneration status to the operator. The algorithm also allows new control over heretofore automatic regeneration, through limiting the inhibit function. The DPF after-treatment operator interface provides multiple status indications to the operator. In a preferred embodiment this is effected using a switched indicator lamp.11-04-2010
20100242439CONTROL UNIT AND CONTROL METHOD FOR REDUCTANT SUPPLY DEVICE - There are provided a reductant supply device and a control method for the reductant supply device, which can prevent heat damage of a reductant injection valve, and also prevent crystallization of urea solution due to excessive cooling of the solution reductant.09-30-2010
20100101211Method of Supplying Iron to the Particulate Trap of a Diesel Engine Exhaust - The invention concerns a method for supplying iron, via the fuel, to the particulate trap of a diesel engine exhaust in a form suitable for promoting trap regeneration. The method involves the addition to the fuel of a defined colloid of iron oxide. Combustion of this colloid produces iron-containing compounds, especially iron oxides, which collect in association with carbonaceous particulate matter in the particulate trap, and function to promote the combustion of this matter.04-29-2010
20090241513Regeneration of Diesel Particulate Filters - Porous ceramic diesel particulate filters are regenerated to combust accumulated carbon particulates trapped therein through a controlled regeneration process wherein heat is input to the filter at a ramped or staged heating rate below that rate at which the particulate combustion process would proceed so rapidly and extensively that filter temperatures would be raised to filter-damaging levels.10-01-2009
20090000274CONTROL ORIENTED MODEL FOR LNT REGENERATION - A method of determining an amount of nitrogen oxides (NOx) stored in a NOx trap of an engine exhaust assembly may include determining a mass flow rate of NOx into the NOx trap, determining an efficiency of storing of the NOx within the trap, and calculating the amount of NOx stored in the NOx trap based on the determined mass flow rate and the determined efficiency. The method may further include determining a mass flow rate of a reductant entering the NOx trap, determining a relationship between the determined reductant mass flow rate and the NOx removed from the NOx trap, and calculating the amount of NOx removed from the NOx trap based on the determined mass flow rate and the determined relationship. The calculated amount of NOx stored may be adjusted by subsequent amounts of calculated NOx stored and subsequent amounts of NOx removed from the NOx trap.01-01-2009
20110173954MODULE INTEGRATING MIXER AND PARTICULATE SEPARATOR INTO A COMMON HOUSING AND AN ENGINE BREATHING SYSTEM HAVING THE MODULE - One exemplary embodiment includes a product including a housing that has a mixer portion and first, second and third openings. The first opening is configured to receive at least a portion of exhaust gases produced by an internal combustion engine, and the second opening is configured to receive intake air. The mixer portion is in communication with the first and second openings to mix the exhaust gases and the intake air into a gas mixture. The third opening is in communication with the mixer portion to flow the gas mixture therethrough. The invention further includes a particulate separator disposed within the housing. The particulate separator is configured to remove particulates from the exhaust gases. The product may be included in a low-pres sure EGR path and/or a high-pressure EGR path.07-21-2011
20080314022Strategy for scheduling LNT regeneration12-25-2008
20110041478Exhaust Gas-Aftertreatment Device and Control Method Thereof - The present invention relates to an exhaust gas-aftertreatment device and a control method thereof. More specifically, the invention relates to an exhaust gas-aftertreatment device, which employs a burner and a metal filter, so that the filter can be regenerated within a short time at high temperature, and wherein the burner is operated when the vehicle is idling, and wherein the filter can be efficiently regenerated by forming a flame in a stable manner using a dispersion means, and which furthermore has enhanced durability, and to a method for controlling the same.02-24-2011
20110041477SYSTEM AND METHOD FOR CONTROLLING REDUCING AGENT INJECTION IN A SELECTIVE CATALYTIC REDUCTION SYSTEM - An engine control system includes a dosing control module and an offset determination module. The dosing control module actuates an injector to inject a first amount of reducing agent into exhaust gas produced by an engine during a period when a temperature of the exhaust gas is greater than a predetermined temperature threshold. The offset determination module determines an efficiency of a selective catalytic reduction (SCR) material based on measured amounts of nitrogen oxide (NOx) during the period and expected NOx amounts, wherein the measured amounts of NOx are measured at locations upstream and downstream from the SCR material, and wherein the expected NOx amounts are based on the temperature of the exhaust gas and the first amount of reducing agent.02-24-2011
20090178387REDUCING CO2 EMISSIONS FROM OILFIELD DIESEL ENGINES - A method of reducing CO07-16-2009
20110162348ENGINE EMISSION CONTROL SYSTEM - Systems and methods are provided for reducing exhaust NOx species using a monolith substrate having a plurality of channels configured with radially varying cell density. The configuration enables radial reductant mixing, thereby improving mixing and atomization of an injected reductant with an exhaust gas stream.07-07-2011
20100275579REMOVAL OF PARTICULATES FROM THE EXHAUST GAS OF INTERNAL COMBUSTION ENGINES OPERATED WITH A PREDOMINANTLY STOICHIOMETRIC AIR/FUEL MIXTURE - The exhaust gas of internal combustion engines operated with a predominantly stoichiometric air/fuel mixture contains, as well as the gaseous hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NO11-04-2010
20120198821DEVICES, SYSTEMS AND METHODS FOR REDUCING AN EMISSION FROM A COMBUSTION REACTION - The invention is directed at systems and process for reducing or eliminating the emissions of one or more undesirable substances. The systems include a heat storage device an emission reduction device, one or more valves, and one or more exit points.08-09-2012
20110252769DIESEL PARTICULATE FILTER OVERSTRESS MITIGATION - Methods and systems for reducing overstress of a DPF are provided herein. One example of such a method is based on a radial temperature gradient near the exit face of the diesel particulate filter. In this way, it becomes possible to more closely correlate radial stresses to actual risk of DPF fracture.10-20-2011
20110252767APPARATUS AND METHOD TO DIAGNOSE A NOX SENSOR - A method includes raising a temperature of an SCR catalyst for a predetermined time period while dosing urea. The method further includes maintaining the temperature of the SCR catalyst without dosing urea for a second predetermined time period. The method further includes filtering out at least low frequency data from a first NO10-20-2011
20110252765EXHAUST THROTTLE VALVE SYSTEM AND METHOD FOR DIESEL PARTICULATE FILTER REGENERATION - An exhaust gas aftertreatment system (10-20-2011
20110005201EXHAUST GAS APPARATUS OF AN INTERNAL COMBUSTION ENGINE - The invention is an exhaust gas apparatus of an internal combustion engine, in particular of an internal combustion engine with gasoline direct injection. The exhaust gas apparatus includes at least one selective catalytic converter. It is provided that a first catalytic converter is positioned upstream of the selective catalytic converter. The invention also provides a method for the purification of exhaust gas of an internal combustion engine, in an internal combustion engine with gasoline direct injection, for use in such an exhaust gas apparatus. In the method the selective catalytic converter is preceded by a first catalytic converter disposed upstream therefrom.01-13-2011
20110005199Method for Reducing Emission of Nitrogen Oxide in a Motor Vehicle Having a Lean Burning Internal Combustion Engine - In a method for reducing the emission of nitrogen dioxide in a motor vehicle having an exhaust gas purification system having an SCR catalytic converter with adsorption centers for nitrogen oxides, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter above an operating temperature. Below the operating temperature, the exhaust gas supplied to the SCR catalytic converter is enriched with a material such that an adsorption of nitrogen oxides is inhibited at corresponding adsorption centers of the SCR catalytic converter. In order to reduce the overall NO01-13-2011
20110252766METHOD OF PRODUCING AMMONIA EFFECTIVE TO CONTROL AFTERTREATMENT CONDITIONS OF NOx EMISSIONS - A method for reducing NOx molecules in an exhaust flow within an exhaust aftertreatment system of an internal combustion engine includes storing NOx from the exhaust flow on a NOx storage component within an aftertreatment device exposed to the exhaust flow. When the exhaust flow includes molecular hydrogen, he stored NOx is released to create ammonia in the exhaust flow. In a selective catalytic reduction device that is downstream of the aftertreatment device, the created ammonia is utilized to reduce NOx in the exhaust flow.10-20-2011
20110162349EMISSION SCR NOX AFTERTREATMENT SYSTEM HAVING REDUCED SO3 GENERATION AND IMPROVED DURABILITY - The present invention relates to an emission treatment system for reducing gases from the exhaust of an engine. In at least one embodiment, the emission treatment system includes an exhaust passage for transporting the exhaust from the engine, a selective catalytic reduction (SCR) catalyst disposed within the passage, and an oxidation catalyst disposed in the passage upstream of the SCR catalyst, with the oxidation catalyst having metal, with at least 90 wt. % of the metal comprising palladium (Pd).07-07-2011
20110162350ENGINE AND EXHAUST AFTERTREATMENT CONTROL - A method of controlling an internal combustion engine and exhaust system having an SCR, and engine and exhaust system including an SCR, described herein, monitors, in real time, NOx conversion efficiency of an exhaust flow output by the internal combustion engine through the SCR. A determination is made as to whether the monitored NOx conversion efficiency exceeds a predetermined target conversion efficiency, such as a target based on a predetermined allowable amount of NOx emission. While the monitored NOx conversion efficiency exceeds the predetermined amount, the NOx concentration level in the exhaust flow is increased by an amount based on the difference in the monitored conversion efficiency and the predetermined target conversion efficiency. Another method and engine and exhaust system provided herein tracks an amount of ammonia stored on a catalyst of the SCR based on a feed-forward calculation of injected urea based on engine out NOx mass flow and reduction efficiency of the SCR catalyst based on a temperature of the SCR catalyst, and operates the engine and exhaust system in a NOx-rich mode in which an EGR fraction command is adjusted, based on the tracked amount of stored ammonia, to decrease an amount of EGR gas entering an intake of the internal combustion engine and thereby reduce ammonia stored on the SCR catalyst.07-07-2011
20110162347Synergistic SCR / DOC Configurations for Lowering Diesel Emissions - A motor-vehicle engine system comprises a first DOC configured to receive exhaust from an engine and an SCR device coupled downstream of the first DOC in a flow direction of the exhaust. The system further comprises a second DOC coupled downstream of the SCR device. The system takes advantage of hydrocarbon sorption in the SCR catalyst that is a function of temperature to enable reduced hydrocarbon emissions via oxidation at the second DOC.07-07-2011
20110162346PROGRESSIVE CATALYST LOADING FOR INTEGRATED PARTICULATE FILTER AND SELECTIVE CATALYTIC REDUCTION UNIT - The present invention relates to an emission control system for reducing gases from the exhaust of a combustion engine. In at least one embodiment, the emission control system includes an exhaust passage for transporting the exhaust from the combustion engine, and a particulate filter and selective catalytic reduction (SCR/PF) unit disposed within the passage, with the unit having a plurality of spaced filter walls extending axially along the passage and selective catalytic reduction catalyst variably loaded on the unit to provide a more uniform pressure drop relative to a unit having uniformly loaded catalyst.07-07-2011
20110252768METHOD AND APPARATUS FOR THE SELF-DIAGNOSIS OF AN EXHAUST GAS PROBE - A method for the self-diagnosis of an exhaust gas probe (10-20-2011
20110047972DEVICE AND METHOD FOR METERING A REDUCING AGENT INTO AN EXHAUST GAS SYSTEM OF A MOTOR VEHICLE - In an internal-combustion engine exhaust gas system, a storage tank stores the reducing agent, a supply pipe connects the storage tank to a metering unit which introduces the reducing agent into the exhaust gas system. A pump mechanism within the supply pipe conveys the reducing agent. A pressure sensor detects the pressure in the supply pipe downstream of the pump, and a pressure-releasing device has a return pipe connected to the storage tank and comes off the supply pipe. A first valve system is arranged in the supply pipe. A section of the return pipe is located at a higher level than the return pipe to form a storage volume for air present in the supply pipe. A second valve system is arranged in the supply pipe to create, when the second valve system is closed, a storage volume for pressurized reducing agent by way of this pipe branch.03-03-2011
20100205936EXHAUST GAS-PURIFYING APPARATUS AND EXHAUST GAS-PURIFYING METHOD - An exhaust gas purifying apparatus, including an NO08-19-2010
20100281851EXHAUST GAS EMISSIONS REACTOR AND METHOD OF TREATING EXHAUST GAS - An exhaust gas emissions reactor and method of treating exhaust gas. The reactor has a housing for receiving exhaust gas from an engine. An oxidation catalyst is disposed in the housing for receiving exhaust gas from an inlet, and at least one mixing duct in the housing receives exhaust gas from the oxidation catalyst. An injector introduces reduction agent into the exhaust gas in the mixing duct, and at least one mixer effects mixing of exhaust gas and reduction agent. Disposed in the mixing duct downstream of the injector is an SCR catalyst for receiving exhaust gas/reduction agent mixture therethrough. Treated exhaust gas is conveyed to an outlet of the housing.11-11-2010
20100281852Filter Regeneration System and Method - A filter regeneration system for an internal combustion engine operable at an engine speed and having: a gas exhaust system for fluidly expelling exhaust gas at an exhaust gas temperature; and at least one filter arrangement in fluid communication with the gas exhaust system and configured to capture particulate in the exhaust gas. The regeneration system includes: a load generating arrangement in operable communication with the internal combustion engine and configured to modify the mechanical load on the internal combustion engine, thereby changing the exhaust gas temperature; and at least one controller in electrical communication with at least a portion of the load generating arrangement and configured to control at least one operating parameter of the load generating arrangement. A method of regenerating a filter arrangement is also disclosed.11-11-2010
20110113751Method and Device for Determining a Dynamic Time Duration for Exhaust Gas Probes of an Internal Combustion Engine - An exhaust catalyst is charged with oxygen until saturated. A given first rich air/fuel ratio (LAM05-19-2011
20120198820SYSTEM AND METHOD FOR ESTIMATING AN AMOUNT OF PARTICULATE MATTER ACCUMULATED IN A PARTICULATE FILTER - An amount of particulate matter accumulated in a particulate filter of an exhaust system is estimated by preloading a memory location with a plurality of hybrid models. Each hybrid model estimates an amount of particulate matter accumulated in the particulate filter between a pair of operating points. An estimated amount of particulate matter accumulated in the particulate filter is stored in the memory location for each hybrid model. Each hybrid model is ranked based on estimation accuracy during operating conditions and the highest ranked hybrid model is selected. The estimated amount of particulate matter accumulated in the particulate filter corresponding to the highest ranked hybrid model is added to the soot estimation value stored in the memory location that corresponds to a ranked hybrid model to provide a soot estimation value of a cumulative estimated amount of particulate matter contained in the particulate filter for the ranked hybrid model.08-09-2012
20110061364METHOD AND SYSTEM FOR UTILIZATION OF REGENERATIVE BRAKING ELECTRICAL ENERGY FOR OPERATING AUXILIARY SYSTEM IN AN OFF-HIGHWAY VEHICLE - Electrical power from a dynamic braking process in an off-highway vehicle is used to power an auxiliary system in the vehicle. The auxiliary system may be a urea storage container heating unit or a particulate filter regeneration heating unit. When dynamic braking electricity is unavailable, and to the extent the dynamic braking electricity is insufficient for powering the auxiliary system, electrical power from an energy device on board the vehicle is used to power the auxiliary system. The energy device may be an auxiliary energy storage device, devoted for use in powering the auxiliary system.03-17-2011
20110120086Reductant addition in exhaust system comprising NOx-absorbent - An exhaust system for a vehicular lean-burn internal combustion engine comprises a NO05-26-2011
20110131952EXHAUST GAS PURIFYING SYSTEM AND EXHAUST GAS PURIFYING METHOD USING THE SAME - An exhaust gas purifying system (06-09-2011
20110131951METHOD AND DEVICE FOR CONTROLLING THE REGENERATION OF A PARTICULATE FILTER - A method of controlling the regeneration of a particulate filter adapted to filter particulate matter present in exhaust emissions of an engine of a vehicle. The particulate filter is coupled to a heating device adapted to be activated so as to cause the heating of the particulate filter. The method includes sensing at least one operating parameter of the particulate filter, receiving sensed data relating to the at least one sensed operating parameter and conditioning the activation of the heating device based on a comparison of the received data with at least one respective threshold. The method further includes adjusting a value of the at least one threshold based on an operating condition of the vehicle, the operating condition being detected based on the received sensed data.06-09-2011
20110131950DIESEL PARTICULATE FILTER CONTROL - Methods and systems are provided for managing particulate emissions in an engine including a particulate filter and a CO06-09-2011
20090211229APPARATUS, SYSTEM, AND METHOD FOR REDUCING NITROGEN OXIDE EMISSIONS IN A COMBUSTION ENGINE - An apparatus, system, and method are disclosed for reducing nitrogen oxide emissions in a combustion engine. The method includes a shift detection module determining an out of gear (OOG) indicator for a manual transmission. The method further includes an engine speed module determining an engine speed target based on at least one operating condition of the engine. The method continues with a load determination module determining an engine load target in response to the OOG indicator and an engine acceleration module determining a desired net torque based on the engine speed target and the engine load target. Finally, the method concludes with an emissions module determining a minimum fuel target based on the desired net torque and an actuation module generating a fueling signal to engage an engine fueling.08-27-2009
20110162345METHOD AND APPARATUS FOR TREATING EXHAUST GAS - In an exhaust gas treatment, the amount of a highly corrosive mercury-halogenating agent to be added is reduced with the mercury-removing efficiency maintained high.07-07-2011
20110167801Method for Operating an Exhaust Emission Control System Having a SCR-Catalyst and an Upstream Oxidation Catalyst Exhaust Emission Control Component - A method for operating an exhaust emission control system of a motor vehicle internal combustion engine, in the exhaust gas line of which an oxidation-catalytically active exhaust emission control component is arranged upstream of a SCR-catalyst is provided. An ageing state of the oxidation-catalytically active exhaust emission control component is determined by correlating a hydrocarbon fraction present in the exhaust emission upstream of the oxidation-catalytically active exhaust emission component with a simultaneous nitrogen oxide conversion of the SCR-catalyst.07-14-2011
20110047973APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING MULTIPLE DIESEL PARTICULATE FILTERS - According to one embodiment, an apparatus for controlling regeneration events on multiple diesel particulate filters (DPFs) of an exhaust after-treatment system includes a regeneration event synchronization module and regeneration event termination module. The regeneration event synchronization module is configured to simultaneously initiate a regeneration event on a first DPF and a regeneration event on a second DPF in response to a regeneration event request being triggered for one of the first and second DPFs. The regeneration event termination module is configured to terminate the regeneration event on the first DPF and the regeneration event on the second DPF. Under normal operating conditions, the termination of the regeneration event on the first DPF is performed independently of the termination of the regeneration event on the second DPF.03-03-2011
20110072785METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE IN CONNECTION WITH AN EXOTHERMAL REGENERATION OF AN EXHAUST GAS AFTERTREATMENT COMPONENT - A method is presented for controlling an internal combustion engine (03-31-2011
20120144802EXHAUST SYSTEM HAVING DOC REGENERATION STRATEGY - An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage configured to receive a flow of exhaust from the combustion engine, and an oxidation catalyst disposed within the exhaust passage. The exhaust system may also have a fuel injector configured to selectively inject fuel into the exhaust at a location upstream of the oxidation catalyst, a temperature sensor configured to generate a signal indicative of a temperature of exhaust flowing through the exhaust passage, and a controller in communication with the fuel injector and the temperature sensor. The controller may be configured to make a determination based on the signal that an oxide layer has formed on the oxidation catalyst, and to regulate operation of the fuel injector to inject fuel and reduce the oxide layer based on the determination.06-14-2012
20090293451Exhaust control system having diagnostic capability - An exhaust control system for use with a combustion engine having a reduction catalyst and a supply of reductant is disclosed. The exhaust control system may have a first sensor located to generate a first signal indicative of an amount of a constituent within the exhaust entering the reduction catalyst, a second sensor located to generate a second signal indicative of an amount of the constituent remaining within the exhaust exiting the reduction catalyst, and a third sensor configured to generate a third signal indicative of an amount of reductant within the supply. The exhaust control system may additionally have a controller in communication with the first sensor, the second sensor, and the third sensor. The controller may be configured to determine a change in an efficiency of the reduction catalyst based on the first and second signals, and diagnose the change in efficiency based on the third signal.12-03-2009
20090293450COLD-START CONTROL SYSTEMS FOR INTERNAL COMBUSTION ENGINES - A cold-start control system includes an air pump control module that controls an air pump and an engine starting module that starts an engine. The air pump control module activates the air pump to supply oxygen to a catalytic converter based on a temperature of the catalytic converter. The engine starting module starts the engine based on the temperature of the catalytic converter.12-03-2009
20110185704Device and Method for Purifying Exahust Gases for an Internal Combustion Engine - The invention relates to a device and a method for purifying exhaust gases for an internal combustion engine, with a multi-flow exhaust gas system having, at least in individual regions, several partial exhaust gas lines, and in which a NO08-04-2011
20110185707METHOD FOR ESTIMATING SLIPPAGE OF A SELECTIVE CATALYST REDUCTION SYSTEM - A method for determining NH08-04-2011
20110185705Device and method for removing carbon dioxide from motor vehicle exhaust - A method and device for removing a minor portion of carbon dioxide from the exhaust gases of a motor vehicle, wherein less than 20 percent of the carbon dioxide is removed, and further wherein exhaust flow is not impeded such that there is no significant reduction in efficiency of the motor itself.08-04-2011
20110258987VAPORIZER - A vaporizer device which works together with an exhaust pipe carrying process exhaust gas. An exhaust duct of the vaporizer device opens into the exhaust pipe. The vaporizer device has a burner comprising an injection device for fuel and air, a combustion chamber, and the exhaust duct. An exhaust gas aftertreatment device is inserted into the exhaust pipe downstream of the junction with the exhaust duct. A method for the operation of such a vaporizer device. According to the invention, a vaporizer device and a method for the operation of such a vaporizer device are provided, and are expanded or improved with respect to the functionality thereof. This is achieved in that an introduction device for the vaporizable liquid is inserted into the exhaust duct. The corresponding method is characterized in that the burner provides sufficient thermal energy, wherein the lower limit thereof is prespecified by the provision of an amount of energy which is sufficient for the vaporization of an amount of vaporizable liquid which is larger than the amount of vaporizable liquid introduced into the exhaust duct.10-27-2011
20110258986METHOD FOR REGENERATING A DIESEL PARTICLE FILTER - A method for regenerating a diesel particle filter (10-27-2011
20110258985Electrically Heated Filter Regeneration Methods and Systems - A method of regenerating a particulate filter is provided. The method includes estimating a stress level of the particulate filter; and selectively controlling current to a heater of the particulate filter based on the stress level.10-27-2011
20100031632CATALYST DETERIORATION DETERMINATION DEVICE AND METHOD, AND ENGINE CONTROL UNIT - A catalyst deterioration determination device capable of determining whether or not fuel is high-sulfur fuel containing much sulfur content, and properly determining whether a catalyst is deteriorated while suppressing the frequency of execution of control for recovering the catalyst from the poisoned state to the minimum. The device determines whether or not a catalyst which purifies exhaust gases exhausted from an internal combustion engine is deteriorated based on the capacity of the catalyst for purifying exhaust gases. If it is determined that the catalyst is deteriorated, first sulfur elimination control is executed for eliminating sulfur content accumulated in the catalyst. Further, when the first sulfur elimination control is terminated, the deterioration determination of the catalyst is executed. Then, when it is determined by the deterioration determination that the catalyst is not deteriorated, it is determined that the fuel is high-sulfur fuel containing lots of sulfur content.02-11-2010
20100024391Increasing exhaust temperature for aftertreatment operation - An internal combustion engine system includes: an engine with a plurality of pistons; a variable load driven by rotary power from the engine, the load including one or more of a pump, an air conditioner; and a fan; aftertreatment equipment to control exhaust emission from the engine; a sensor to provide a sensor signal corresponding to temperature of exhaust from the engine; and a controller coupled to the sensor and operable to regulate a regeneration operation of one or more components of the aftertreatment equipment. The controller responds to the sensor signal to generate one or more control signals to adjust the variable load to increase loading of the engine and correspondingly raise the temperature of the exhaust for the regeneration operation.02-04-2010
20100024390APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - According to one representative embodiment, an apparatus for reducing NO02-04-2010
20110296817ADAPTIVE OXYGEN SENSOR METHODS, SYSTEMS, AND SOFTWARE - One embodiment is a system operable to control entry of an oxygen sensor into a learning mode. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.12-08-2011
20120144801SYSTEM AND METHOD FOR DETERMINING SELECTIVE CATALYTIC REDUCTION DOSING SYSTEM PERFORMANCE USING AN AMMONIA SENSOR - A control system for a selective catalytic reduction (SCR) system includes a dosing control module, a comparison module, and a status determination module. The dosing control module controls a dosing system to inject a desired amount of ammonia into exhaust gas at a first location in an exhaust stream. The comparison module compares a measured amount of ammonia in the exhaust gas to the desired amount of ammonia, wherein the measured amount of ammonia is measured at a second location downstream from the first location and upstream from or within an SCR catalyst. The status determination module determines a pass/fail status of a component of the dosing system based on the comparison between the measured amount of ammonia and the desired amount of ammonia.06-14-2012
20120144805ARRANGEMENT AND METHOD FOR OPERATING AN EXHAUST GAS POST-TREATMENT DEVICE - The invention relates to an arrangement (06-14-2012
20100212290REDUCTANT DOSING SYSTEM HAVING ANTI-AERATION DEVICE - A reductant dosing system for a machine having an engine and an exhaust system is disclosed. The reductant dosing system has a tank configured to hold a reductant, a dosing arrangement, and a supply passage connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank.08-26-2010
20120036835METERING SYSTEM FOR INJECTING A REDUCING AGENT INTO THE EXHAUST GAS FLOW OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a reducing agent metering system, and to a method for controlling the injection of a reducing agent into the exhaust gas flow (02-16-2012
20120036833Scavenging Vacuum Pressure Provisioning with Exhaust Treatment - In one embodiment, a method that includes collecting particles from an intake flow of air for a diesel engine; removing the particles collected using scavenging vacuum pressure and without adding exhaust restriction; and treating combustion products of the diesel engine.02-16-2012
20110131949Reduction of Particulate, NOx, and Ammonia Emissions - A method for controlling emissions from an engine includes reducing trapped nitrogen oxides to ammonia on an LNT catalyst while concurrently oxidizing soot accumulated on the LNT catalyst, and, flowing the ammonia so formed to an SCR catalyst.06-09-2011
20100242438EXHAUST GAS TREATMENT SYSTEM INCLUDING A FOUR-WAY CATALYST AND UREA SCR CATALYST AND METHOD OF USING THE SAME - The present invention is directed towards methods and systems for treatment of exhaust gas from an engine. In one embodiment, an exhaust gas treatment system for a diesel engine is provided. The system includes a urea selective catalytic reduction (U-SCR) catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom. The system also includes a four-way catalyst in fluid communication with the U-SCR catalyst to receive the exhaust gas flow therefrom, the four-way catalyst comprising a lean nitrogen oxide (NO09-30-2010
20120144804METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE OF EXHAUST GAS FROM AN INTERNAL-COMBUSTION ENGINE FLOWING THROUGH A MEANS OF TREATING THE POLLUTANTS CONTAINED IN THIS GAS - The present invention relates to a method for controlling the temperature of exhaust gas circulating in an exhaust line (06-14-2012
20120167554HYBRID ENGINE AFTERTREATMENT THERMAL MANAGEMENT STRATEGY - A system includes an internal combustion engine producing exhaust gases as a byproduct of operation and an aftertreatment system that treats the exhaust gases. The system further includes a controller that is structured to functionally execute operations to enhance the temperature of the aftertreatment system. The controller includes an operating condition monitoring module that interprets a temperature value at a position upstream of a catalyst positioned in the aftertreatment system. The controller further includes an operating condition management module that interprets a threshold temperature value, and an engine management module that provides an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value.07-05-2012
20100263354Exhaust Aftertreatment System with Flow Distribution - An exhaust aftertreatment system has a side inlet flow diffuser and provides even flow exhaust distribution to an aftertreatment element.10-21-2010
20110113754EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification catalyst, which is suitable as a Three way catalyst for efficiently purifying carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO05-19-2011
20110113753Method for Operating an Exhaust Gas Treatment System Having an SCR Catalytic Converter - A method for operating an exhaust gas treatment system that includes an SCR catalytic converter is provided. Either a model-based filling level regulation for achieving the target filling level or a model-based efficiency control for achieving the target efficiency is performed according to presettable values for certain operating variables such as a temperature of the exhaust gas or of the SCR catalytic converter.05-19-2011
20110047969Post injection bucketing strategy to avoid hardware cavitation - An engine control system (03-03-2011
20120036834Mn, Ce and Zr MIXED OXIDES OXIDATION CATALYST - The oxidation of nitrogen oxide (NO) in an oxygen-containing exhaust gas flow from a diesel or other lean-burn engine may be catalyzed using particles of co-precipitated and calcined manganese (Mn), cerium (Ce) and zirconium (Zr) mixed oxides. In preferred embodiments, the molar ratios of Mn, Ce and Zr to the total amount of base metals in the ternary mixed oxide catalyst are in the range of 0.25-0.35, 0.40-0.50 and 0.20-0.25, respectively. Further, this ternary mixed oxide catalyst is less susceptible to sulfur poisoning than previously-disclosed binary mixed oxide catalysts. The ternary mixed oxide catalyst may also be regenerated—and the inhibiting effect of SO02-16-2012
20120036832Methods and Device for Low Contamination Energy Generation - A method for low-contamination generation of energy comprising: (a) forming a gas mixture by mixing a treated gaseous effluent stream and air; (b) introducing the gas mixture and fuel at a given gas to fuel ratio into at least one diesel engine (02-16-2012
20120304623EXHAUST GAS AFTERTREATMENT DEVICE AND METHOD FOR A GASOLINE ENGINE - Embodiments for an exhaust gas aftertreatment device are provided. In one example, an exhaust gas aftertreatment device for a gasoline engine comprises a filter body with porous filter walls through which exhaust gas flows to remove soot, the porous filter walls containing a first catalyst material and having a coating of a second catalyst material on partial areas of the filter walls. In this way, a particulate filter and catalyst may be provided in a common aftertreatment device.12-06-2012
20120304622METHOD OF USING A REGENERATIVE BRAKE SYSTEM FOR HEATING A MOTOR VEHICLE CATALYTIC CONVERTER AND POWERING OTHER ELECTRICAL ACCESSORIES - A method for a motor vehicle includes using a regenerative brake system that produces electric current as a result of application of said regenerative brakes and sending at least a fraction of the electric current directly to an electrical accessory of the vehicle and bypassing the battery. One electrical accessory may be an electrically heated catalytic converter.12-06-2012
20120304624NON-STOICHIOMETRIC PEROVSKITE OXIDE OXIDATION CATALYST FOR OXIDIZING NO TO NO2 - A non-stoichiometric perovskite oxide having the general chemical formula La12-06-2012
20100071346HYDROLYSIS CATALYST WITH LARGER DUCT CROSS-SECTIONS IN THE PERIPHERAL PORTION THAN IN THE CENTRAL PORTION, AND METHOD FOR HYDROLYSIS OF A URIC SUBSTANCE - A hydrolysis catalyst forming part of an exhaust system for a combustion engine for catalytically converting a uric substance to ammonia which can be used in a downstream SCR catalyst. The hydrolysis catalyst includes an active catalyst element with a central portion and a surrounding peripheral portion, both of which are lined with the same catalyst material. To ensure that injected urea, or other uric substance, which can become crystallised, does not cause blockages in the catalyst, the cross-sectional areas of separate ducts in the peripheral portion are larger than the cross-sectional areas of the separate ducts in the central portion. A method for hydrolysis of a uric substance by use of the catalyst and directing flow through the ducts of the peripheral portion upon blockage of ducts in the central portion.03-25-2010
20110094206REDUCTANT INJECTION AND DECOMPOSITION SYSTEM - According to one embodiment, a reductant injection apparatus includes an injector attachment portion to which a reductant injector is coupleable. The apparatus also includes a perforated tubular portion coupled to the injector attachment portion. The perforated tubular portion includes an inlet, an outlet, and a diverging sidewall extending from the inlet to the outlet. Additionally, a plurality of perforations is formed in the sidewall. A reductant spray can be injected into the perforated tubular portion via the inlet. Further, a portion of a bulk exhaust gas stream can be diverted into the perforated tubular portion through the plurality of perforations, through the perforated tubular element, and out of the perforated tubular portion through the plurality of perforations. The portion of exhaust gas stream can then be rejoined with the bulk exhaust gas stream downstream of the perforated tubular portion.04-28-2011
20120000182HYDROCARBON ADSORBER REGENERATION SYSTEM - A regeneration system includes a first module, a mode selection module and an adsorber regeneration control (ARC) module. The first module monitors at least one of (i) a temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the first catalyst. The mode selection module is configured to select an adsorber regeneration mode and generates a mode signal based on the at least one of the temperature and the active catalyst volume. The ARC module at least one of activates an air pump and cranks the engine to regenerate an adsorber of the catalyst assembly while the engine is deactivated based on the mode signal.01-05-2012
20120000185METHOD FOR DETECTING ABNORMALITY IN REDUCING AGENT - Disclosed is a method for detecting abnormality in a reducing agent 01-05-2012
20120000184METHOD OF MONITORING SOOT MASS IN A PARTICULATE FILTER AND MONITORING SYSTEM FOR SAME - A method of monitoring soot mass in a particulate filter of an exhaust system includes predicting soot mass in the particulate filter based at least partially on a pressure differential between exhaust flowing into the filter and exhaust flowing out of the filter. The predicted soot mass is then revised based at least partially on measured operating parameters indicative of mass flow rate of nitrogen oxides in exhaust flow of the exhaust system and temperature of the particulate filter.01-05-2012
20120000181EXHAUST SYSTEM HAVING AN AFTERTREATMENT MODULE - An aftertreatment module for use with an engine is disclosed. The aftertreatment module may have a first chamber with an inlet, and at least one catalyst substrate disposed in the first chamber in a flow path through the inlet and having a flow direction from an inlet face to an outlet face in general alignment with the flow path. The aftertreatment module may also have a second chamber with at least one outlet in general alignment with the flow direction through the inlet. The aftertreatment module may further have at least one noise attenuation passage fluidly connecting the first chamber with the second chamber. The at least one noise attenuation passage may be oriented generally orthogonal to the inlet and the at least one outlet and be located between the inlet and the outlet face of the at least one catalyst substrate.01-05-2012
20120000180SYSTEM AND METHOD FOR PARTICULATE MATTER FILTER REGENERATION USING A CATALYTIC CONVERTER AS A COMBUSTOR - A control system for an engine includes an exhaust module and a combustion module. The exhaust module supplies a first MAF to exhaust produced by the engine upstream of a catalytic converter during regeneration of a PM filter located downstream of the catalytic converter. The combustion module, during the regeneration, supplies a first amount of fuel to a cylinder during an intake stroke based on the first MAF and a second MAF to the cylinder during the intake stroke. The combustion module, during the regeneration, further supplies a second amount of fuel to the cylinder during a subsequent intake stroke based on a first A/F ratio of the cylinder and an oxygen content of the exhaust downstream of the catalytic converter. A method for controlling an engine during regeneration of the PM filter is also provided.01-05-2012
20120042635Method for Operating a Reducing Agent Supply System - A method for operating a reducing agent supply system for supplying an exhaust aftertreatment system of a motor vehicle is provided. In normal metering operation of the reducing agent supply system an at least approximately continuous air stream and a pulsed reducing agent stream are produced and are released at least partially via the nozzle into the exhaust line. In a cleaning operation for cleaning the reducing agent supply system an air stream formed from a number of air stream pulses and a reducing agent stream formed from a number of reducing agent stream pulses are produced and supplied to the nozzle means. The method can be used in particular in supply systems in which aqueous urea solution is used as reducing agent.02-23-2012
20120060472CATALYST MATERIALS FOR NOx OXIDATION IN AN EXHAUST AFTERTREATMENT SYSTEM THAT USES PASSIVE AMMONIA SCR - An exhaust aftertreatment system that receives an exhaust flow from a lean-burn engine and a method for treating the exhaust flow are described. The exhaust aftertreatment system may include a three-way-catalyst, an oxidation catalyst, and a NH03-15-2012
20120006006Exhaust Gas Treatment Device and Method for Operating an Exhaust Gas Treatment Device - An exhaust gas treatment device for an internal combustion engine, with a first particle filter and a second particle filter arranged downstream of the first particle filter in the flow direction of the exhaust gas through the exhaust gas treatment device. The second particle filter includes a support device that can be flown through by the exhaust gas, on which a filter unit is disposed. A pore size of the filter unit is less than a pore size of the support device. A method for operating an exhaust gas treatment device for an internal combustion engine is also provided.01-12-2012
20120006007METHOD FOR OPERATING AN EXHAUST SYSTEM, EXHAUST SYSTEM AND VEHICLE HAVING AN EXHAUST SYSTEM - A method for operating an exhaust system including at least one oxidation catalytic converter, at least one configuration for selective catalytic reduction and at least one measuring probe for determining the effectiveness of the configuration, includes at least determining a conversion effectiveness of the configuration using the at least one measuring probe and calculating an effectiveness of nitrogen monoxide conversion in the oxidation catalytic converter from the determined conversion effectiveness. In this way, an estimate of the effectiveness of the nitrogen monoxide conversion to nitrogen dioxide of an oxidation catalytic converter in the exhaust system can be obtained without additional measuring probes in or on the oxidation catalytic converter. This reduces the maintenance frequency of the exhaust gas system and at the same time enables precise regulation of the exhaust gas conversion as a whole. An exhaust system and a vehicle having an exhaust system are also provided.01-12-2012
20120006005Exhaust Gas Post Processing System and Control Method Thereof - An exhaust gas processing method may include desulfurizing a catalyst by raising temperature of the catalyst to a predetermined value, if the front/end temperature difference ΔT is less than a predetermined temperature difference X, while reducing agent is being injected, determining whether travel distance, fuel consumption amount, or travel time exceeds a first reference value, after the desulfurization, determining whether fuel is replenished by detecting the fuel amount, and determining whether a high sulfur fuel is refueled or not, if the first reference value does not exceed a predetermined value, the fuel is replenished, and the temperature difference (ΔT) is less than the predetermined temperature difference (X) during injection of the reducing agent. Accordingly, while the nitrogen oxide purification mode is being performed so as to eliminate the nitrogen oxide, the desulfurization control is performed according to a temperature difference between the front and the rear of the catalyst, and if the abnormal desulfurization control is repeatedly performed, it is determined that the high sulfur fuel is replenished. Further, this method has the vehicle driver effectively determine whether the high sulfur fuel is replenished or not and guide the vehicle driver not to replenish the high sulfur fuel some other time.01-12-2012
20120006004METHODS AND SYSTEMS FOR CONTROLLING REDUCTANT LEVELS IN AN SCR CATALYST - Methods and systems for controlling reductant levels in an SCR catalyst are provided. In one aspect, reductant levels are adjusted in response to a ratio of change of NOx conversion efficiency to a change of reductant level. In another aspect, reductant injection levels are periodically adjusted to see if NOx conversion efficiency is better or worse at the adjusted levels.01-12-2012
20110005200Catalyst System for the Reduction of NOx and NH3 Emissions - This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH01-13-2011
20120204542MULTI-LEG EXHAUST AFTERTREATMENT SYSTEM AND METHOD - An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs.08-16-2012
20120204544HYDROCARBON RETAINING AND PURGING SYSTEM - Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action.08-16-2012
20120204543METHOD FOR REGENERATION OF EXHAUST GAS TREATMENT CATALYST, AND EXHAUST GAS TREATMENT CATAYLST PRODUCED USING THE METHOD - A regenerated exhaust gas treatment catalyst (08-16-2012
20120011829METHOD TO OPERATE A DIESEL PARTICULATE FILTER - A method is provided to operate a diesel particulate filter of a Diesel engine equipped with a soot-sensor located in an outlet of the diesel particulate filter, the soot-sensor operating according to a succession of soot loading phases mutually separated by a regeneration phase. The method includes, but is not limited to setting a borderline value of the efficiency of the diesel particulate filter, resetting a value of a counter, during a regeneration phase of the soot-sensor, this value representing a soot loading level of the soot-sensor, iteratively increasing the value of this counter, during a next soot loading phase of the soot-sensor, at least until the value reaches a predetermined threshold value of the counter, and detecting an unsuited efficiency of the diesel particulate filter, if a next regeneration phase of the soot-sensor begins when the value of the counter is below the predetermined threshold value of the counter.01-19-2012
20100077727CONTINUOUS DIESEL SOOT CONTROL WITH MINIMAL BACK PRESSURE PENATLY USING CONVENTIONAL FLOW SUBSTRATES AND ACTIVE DIRECT SOOT OXIDATION CATALYST DISPOSED THEREON - There is disclosed high cell density or tortuous/turbulent flow through monolithic catalyst devices for the direct catalytic, and (semi) continuous oxidation of diesel particulate matter. The catalysts relate to OIC/OS materials having a stable cubic crystal structure, and most especially to promoted OIC/OS wherein the promotion is achieved by the post-synthetic introduction of non-precious metals via a basic (alkaline) exchange process. The catalyst may additionally be promoted by the introduction of Precious Group Metals.04-01-2010
20120055138METHODS FOR ENGINE EXHAUST NOX CONTROL USING NO OXIDATION IN THE ENGINE - A powertrain includes an internal combustion engine having a combustion chamber and an aftertreatment system. A method for reducing NOx emissions in the powertrain includes monitoring an actual exhaust gas feedstream ratio of NO03-08-2012
20120204541EXHAUST MIXER ELEMENT AND METHOD FOR MIXING - According to one aspect of the invention, a mixer element to be placed between an internal combustion engine exhaust manifold and catalytic converter is provided. The mixer element includes a tubular conduit that receives an exhaust gas flow from the internal combustion engine, a first mixer configured to induce a first vortex of the exhaust gas flow in a first rotational direction and an injector disposed in the tubular conduit downstream of the first mixer, the injector being configured to inject a diesel emission fluid flow into the exhaust gas flow. The mixer element also includes a second mixer positioned downstream of the injector and a third mixer positioned downstream of the second mixer, the third mixer being configured to induce a second vortex of the exhaust gas flow and the diesel emission fluid mixture in a second rotational direction, opposite of the first rotational direction.08-16-2012
20120204540POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a first battery outputting a first voltage, and a second battery outputting a second voltage. The system further includes a switching device having a first operational state where the first and second batteries are coupled in series to one another, and a second operational state where the first and second batteries are coupled in parallel to one another. The system further includes a generator coupled to the first battery, and when the switching device is in the second operational state the generator supplies a third voltage to the first battery to charge the first and second batteries, and to the electrically heated catalyst such that the catalyst heats exhaust gases upstream of an oxidation catalyst.08-16-2012
20120204539HYBRID VEHICLE THERMAL MANAGEMENT USING A BYPASS PATH IN A CATALYTIC CONVERTER UNIT - A hybrid vehicle includes an exhaust gas treatment system having a bypass valve for directing a flow of air or exhaust gas through a bypass path or through a primary catalyst. The hybrid vehicle includes an internal combustion engine and an electric motor, each selectively engageable with a transmission to provide a drive torque. The electric motor spins the internal combustion engine when engaged to provide the drive torque, thereby creating a flow of unheated air from the internal combustion engine that flows through the exhaust gas treatment system. The bypass valve directs the flow of air through the bypass path when the engine is spinning and not fueled to prevent cooling of the primary catalyst. The bypass valve directs the flow of exhaust gas through the primary catalyst when the internal combustion engine is spinning and is being fueled, i.e., running, to treat the flow of exhaust gas.08-16-2012
20120060477OPERATING METHOD FOR AN EXHAUST AFTERTREATMENT SYSTEM AND EXHAUST AFTERTREATMENT SYSTEM - An operating method of an exhaust gas aftertreatment system including at least a particulate filter for retaining soot from the exhaust gas of an engine and a deNOx catalytic converter for reducing nitrogen oxide in the exhaust gas of the engine is provided. Operation regimes of the particulate filter and of the deNOx catalytic converter are synchronized with respect to each other for performing regeneration of the particulate filter while the catalytic converter provides a nitrogen oxide conversion efficiency above a predetermined limit.03-15-2012
20120060476METHOD FOR MONITORING THE POLLUTANT COVERSION CAPACITY IN AN EXHAUST GAS AFTER-TREATMENT SYSTEM - A method for monitoring a pollutant conversion capacity of a catalytically coated, oxidizing exhaust gas after-treatment component in an exhaust gas system of an internal combustion engine, wherein a capacity of the catalytic coating of the exhaust gas after-treatment component for oxidizing NO to NO03-15-2012
20120060475METHOD FOR ADAPTING AN EXOTHERMIC REACTION IN THE EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a thermal model of a catalyst is provided. The method comprises adjusting an amount of exhaust gas reductant upstream of the catalyst based on a thermal model of the catalyst, the thermal model including heat input from exothermic catalyst reactions, an amount of the exothermic heat input adjusted responsive to an estimated temperature from the thermal model and a measured temperature downstream of the catalyst. In this way, a thermal model for catalyst activity and catalyst operating parameters may be adjusted to ensure optimal catalyst function.03-15-2012
20120060471EXHAUST GAS AFTERTREATEMENT SYSTEM AND METHOD OF OPERATION - An exhaust gas after treatment system for an internal combustion engine comprises an oxidation catalyst device having a first substrate, a heater, and a second substrate disposed serially between the inlet and the outlet. A hydrocarbon supply is connected to and is in fluid communication with the exhaust system upstream of the oxidation catalyst device for delivery of a hydrocarbon thereto. The heater is configured to oxidize the hydrocarbon therein and to raise the temperature of the second substrate and exhaust gas passing therethrough.03-15-2012
20120060470ECONOMIC MEANS OF ASPIRATING A FUEL COMBUSTION ENGINE WITH NON-ATMOSPHERIC GASES TO PRODUCE A SUBSEQUENTLY USEFUL BYPRODUCT - Aspirating a fuel combustion engine with non-atmospheric gases to produce exhaust that can be efficiently used as EOR working fluid and/or recirculated in subsequent fuel combustion processes. The EOR working fluid is made up of a combination of gases created in a combustion process in a power-producing fuel combustion engine. This combustion process occurs using a mix of initial combustion ingredients that includes CO03-15-2012
20120060473MARINE EXHAUST CATALYST - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust.03-15-2012
20120117947NOx ADSORBER REGENERATION SYSTEM AND METHOD - An exhaust gas after treatment system for an engine comprises an oxidation catalyst NOx adsorber wherein an oxidation catalyst compound and a NO05-17-2012
20120117946CONTROL METHOD AND APPARATUS FOR REGENERATING A PARTICULATE FILTER - Control methods for regenerating particulate filter and an apparatus that includes an internal combustion engine, an exhaust gas conduit in fluid communication with and configured to receive exhaust gas from the internal combustion engine, and a particulate filter assembly in fluid communication with the exhaust gas conduit and configured to receive exhaust gas flowing therethrough. The particulate filter assembly includes a particulate filter to remove particulates from the exhaust gas, a heater device disposed near a front face of the particulate filter, to supply heat for regeneration of the particulate filter after shut-off of the internal combustion engine, and an air pump to input air into the particulate filter to transfer the supplied heat from the heater device to the particulate filter.05-17-2012
20120117945SYSTEM AND METHOD FOR SENSING PARTICULATE MATTER - A computerized method includes receiving signals from a particulate matter sensor relating to an amount of particulates at a point in time within a time period in a diesel engine exhaust stream, calculating one or more running statistical parameters relating to a particle mass in the diesel engine exhaust stream, determining an upper control limit for the amount of particulates, receiving a threshold for an allowable amount of particulates in the diesel engine exhaust stream, comparing the threshold to one or more of (a) a current instantaneous particulate reading from the particulate matter sensor and (b) the upper control limit for the amount of particulates, and generating an output signal when one or more of the current instantaneous particulate reading and the upper control limit for the amount of particulates are above the threshold.05-17-2012
20110061365EXHAUST VALVE FOR A LARGE SIZED TWO STROKE DIESEL ENGINE, PROCESS FOR REDUCTION ON NOX-FORMATION IN SUCH AN ENGINE AND SUCH ENGINE - For reducing the NO03-17-2011
20110094207METHOD FOR CLEANING INTERNAL COMBUSTION ENGINE EXHAUST GASES - Described is a method for cleaning the exhaust gases of internal combustion engines, which method is suitable for reducing harmful gases and particle emissions. Here, the exhaust gas to be cleaned is conducted, under operating conditions, with a discontinuous profile of the air ratio λ across a wall-flow filter substrate which comprises a catalytically active coating containing one storage material. The storage material is suitable for temporarily storing one or more exhaust-gas components under certain operating conditions and releasing said exhaust-gas components again in a targeted fashion in the event of a suitable change in the operating conditions. The coating is configured such that the component has a gradient of the storage material concentration and/or of the total coating amount, with the highest concentration of the storage material in the longitudinal direction of the component being present on the inflow side. At least 60% by weight of the storage material in relation to its total amount is present in the walls between inflow and outflow ducts, and at least 50% by weight of the storage material in relation to its total amount is present in a first, inflow-side zone in the wall-flow filter substrate.04-28-2011
20120151900SYSTEM AND METHOD FOR UNLOADING HYDROCARBON EMISSIONS FROM AN EXHAUST AFTER-TREATMENT DEVICE - A method unloads hydrocarbon emissions deposited by an exhaust gas on an after-treatment device that is employed in an exhaust system for an internal combustion engine. The method includes determining whether the engine has been operating at a preset idle speed for a predetermined amount of time. The method also includes increasing the preset idle speed by a predetermined value if the engine has been operating at a preset idle speed for a predetermined amount of time. The increasing of the engine idle speed increases a flow rate of the exhaust gas to the after-treatment device and unloads the deposited hydrocarbon emissions. A system for unloading hydrocarbon emissions deposited on an after-treatment device and a vehicle employing such a system are also disclosed.06-21-2012
20120233985APPARATUS COMPRISING LEAN BURN IC ENGINE AND AN EXHAUST SYSTEM THEREFOR - An apparatus comprises: (i) a lean burn internal combustion engine; (ii) an exhaust system for treating a flowing exhaust gas from the engine, which system comprising: (a) a first substrate monolith comprising a NOx adsorber catalyst (NAC); and (b) a catalysed soot filter (CSF) comprising a filter substrate; and (iii) means for enriching the exhaust gas to provide an enriched exhaust gas composition intermittently during normal lean running operation for removing sulfate adsorbed on the NAC, wherein the exhaust system comprises: (c) a compound located downstream of at least some of the NAC, which compound is effective to remove and/or convert at least some hydrogen sulfide in enriched exhaust gas derived from removing sulfate adsorbed on the NAC.09-20-2012
20120210698METHOD AND DEVICE FOR DETERMINING THE CONVERSION CAPACITY OF A CATALYTIC CONVERTER FOR CLEANING EXHAUST GAS - A method for assessing the conversion capacity of a catalytic converter for hydrocarbons when cold starting an internal combustion engine by means of an exhaust probe arranged behind the catalytic converter in the direction of flow, wherein an output signal from the exhaust probe is fed to a control unit.08-23-2012
20110088371System And Method For Inhibiting Regeneration Of A Diesel Particulate Filter - A system and method for initiation and control of passive regeneration (04-21-2011
20120117949EXHAUST GAS AFTERTREATMENT SYSTEM - The invention relates to an exhaust gas post treatment system for an internal combustion engine, including an intake device for taking hydrocarbons into an exhaust gas pipe carrying the exhaust process gas from the internal combustion engine and a treatment device through which exhaust process gas flows downstream of the intake location and which increases the exhaust process gas temperature by means of oxidation of the hydrocarbons taken in. The invention specifies an exhaust gas post treatment system and a method for operating such an exhaust gas post treatment system which can be implemented cost-effectively. This is achieved in that the treatment device has catalytically coated components, in that the hydrocarbons are at least partly evaporated in the intake device and are modified chemically by means of cracking reactions and/or by means of partial oxidation, and in that the proportion of platinum, at least in a subregion of the catalytic coating of the components, is less than 50% of the overall mass of all the catalytically active substances in this sub region of the coating.05-17-2012
20120117948 EXHAUST GAS AFTERTREATMENT - A method to improve NO05-17-2012
20110179773METHOD FOR SELECTIVELY HEATING A REDUCING AGENT LINE AND DEVICE FOR EXHAUST GAS PURIFICATION IN A VEHICLE - A method for selectively heating a reducing agent line of an SCR device during operation of an exhaust gas purification system of an internal combustion engine and a device for exhaust gas purification, include a supply tank for a reducing agent for SCR applications, a device for introducing the reducing agent into an exhaust line of an internal combustion engine and at least one reducing agent line for fluidically connecting the supply tank to the device.07-28-2011
20110179772Motor Vehicle Having a System for Feeding Fluid into Another Medium, Particularly for Feeding a Reducing Agent into the Exhaust Gas of an Internal Combustion Engine - In a system for feeding fluid into an exhaust gas after-treatment system, during operation fluid is fed via a feed line of the dispensing unit from a main container and is partially returned via a return line to the main container. A diaphragm pressure container is provided on the feed line downstream of a pump and a non-return valve toward the dispensing unit. During operation of the pump, the diaphragm pressure container is filled with fluid. The diaphragm pressure container is emptied as soon as the pump stops operating. In this way, the dispensing unit is cooled even after the operation of the system has ended, thereby protecting electronic components of the same from overheating.07-28-2011
20110179771METHOD FOR REGENERATION OF DIESEL PARTICULATE FILTER IN AN EXHAUST AFTERTREATMENT SYSTEM OF AN IC ENGINE - A method for regenerating a DPF in an exhaust aftertreatment system includes the steps of: monitoring a temperature of exhaust associated with a DOC; retarding an injection of fuel into at least one combustion cylinder, and thereby intentionally causing a misfire in the at least one combustion cylinder, dependent on the monitoring step; increasing an outlet temperature of the exhaust from the DOC to a first threshold temperature; and oxidizing particulates within the DPF when the exhaust is at the increased temperature. The number and/or frequency of the misfires is controlled to provide the desired exhaust temperature at the DPF inlet.07-28-2011
20120124968MIXING PIPE FOR SCR MUFFLERS - An apparatus for treating exhaust includes a housing having an inlet and an outlet, the housing defining a chamber. The inlet is in fluid communication with a source of exhaust. A mixing tube is connected to the inlet. The mixing tube has at least two branches and a plurality of apertures defined in a wall of the mixing tube. A substrate is disposed between the mixing tube and the outlet. The at least two branches converge at an end section of the mixing tube to form a mixing loop.05-24-2012
20120124966METHOD OF DIESEL PARTICULATE FILTER (DPF) TO CALCULATE ACTUAL SOOT LOAD AND ASH LOAD OF THE FILTER - A method to operate an internal combustion engine with a diesel particulate filter to extend the life of the diesel particulate filter by initiating active regeneration of the diesel particulate filter when the soot load of the filter exceeds a predetermined actual soot load value.05-24-2012
20120124969DEVICE AND METHOD FOR COMBUSTING PARTICULATE SUBSTANCES - It is possible to provide a device and a method for combusting particulate substances which particulate matters discharged from an internal combustion engine can be effectively combusted, and the device configuration is simple and does not become large and heavy. The combustion device has: an introduction portion 05-24-2012
20120124967Adaptive Control Strategy - A vehicle has an exhaust aftertreatment system including an LNT. The vehicle operates through a series of ignition cycles, deNO05-24-2012
20120159930Exhaust Particulate Filter System And Operating Method Therefor - A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 06-28-2012
20120159931EXHAUST SYSTEM AND HEATING-UP METHOD - The present invention relates to an exhaust system for a combustion engine, particularly of a vehicle, with an oxidation catalytic converter (oxicat), with an electrically heatable catalytic converter (E-cat) arranged upstream of the oxicat and with a fuel injector arranged upstream of the E-cat.06-28-2012
20120159928System and method for introducing a reductant agent - A system and method controls injection of a reductant agent in a selective catalytic reduction system. The system and method include an injector injecting the reductant agent to an exhaust system directing exhaust from a power system. A coolant system circulates coolant proximate to the injector. A coolant temperature sensor monitors a coolant temperature of the coolant. A controller adjusts the injection timing of the injector based at least in part on the coolant temperature.06-28-2012
20120159929EXHAUST PARTICULATE FILTER SYSTEM AND METHODS - A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 2 GHz through an exhaust particulate filter containing trapped soot. The transmitted electromagnetic energy may be attenuated in response to the trapped soot, and a filter soot loading value calculated based at least in part upon a correlation among an attenuation of the electromagnetic energy, a temperature of the filter, and a mass of the trapped soot. An algorithm based upon a partial derivative of an equation representing the correlation may be used in calculating the filter soot loading value, and a resulting soot mass. Responsive to determining the calculated soot mass satisfies regeneration suitability conditions, a regeneration initiation command may be outputted.06-28-2012
20120159927PEROVSKITE OXIDE COMPOUNDS FOR USE IN EXHAUST AFTERTREATMENT SYSTEMS - A method for removing NO06-28-2012
20100205937Method and system for injecting a liquid - Method for controlling an injector intended for injecting a pollution-control liquid additive into the exhaust gases of an internal combustion engine at a flow rate governed by a given frequency and opening time of the injector, the injector having a calibration curve that establishes, at given frequency, pressure, temperature and nature of the liquid, the amount of liquid injected during an opening of the injector as a function of the duration of this opening, this curve comprising at least one linear zone (calibration line) and a non-linear zone, said method being characterized in that in the linear zone the parameters of the calibration line are used and in the non-linear zone use is made of a set opening time and a variable frequency according to at least one calibration point established for this purpose. SCR system to which this method can be applied.08-19-2010
20120247084ELECTRIC PREHEATING OF A CATALYTIC CONVERTOR USING A SOLAR CELL ARRAY - An internal combustion engine vehicle or hybrid-electric vehicle is provided with a vehicle-mounted solar cell array capable of generating electrical power. The solar cell array and other elements, including a metal substrate catalytic convertor form a system for reducing exhaust gas emissions from the vehicle in which the power from the array is applied to minimize exhaust emissions. A primary application of the solar cell array-generated power is to preheat the catalytic convertor to a preferred operating temperature prior to engine start. But the power from the solar cells, directed by a controller, may also be applied to charge the battery or to power electric power receiving devices, for example, to control cabin temperatures. The preferred allocation of the solar power available depends on a number of factors including the state of charge of the batteries, and the time of anticipated next use of the vehicle.10-04-2012
20120131905EXHAUST GAS POST PROCESSING METHOD - An exhaust gas post processing method may include determining whether a driving condition is included in an area for monitoring a rapid-heat-up (RHU) logic process that is used to quickly raise a temperature of exhaust gas passing an exhaust line, detecting on/off signal that performs or stops the rapid-heat-up logic process, determining whether an injection signal for performing the rapid-heat-up logic process is activated or not, detecting error of components for performing the rapid-heat-up logic process, and detecting the temperature of the exhaust during the rapid-heat-up logic process and comparing the detected temperature with a modeled value.05-31-2012
20120131906Exhaust Gas Aftertreatment Method - An exhaust gas aftertreatment method may include a regenerating a diesel particulate filter normally, accumulating a time from a point that the diesel particulate filter starts to be regenerated, determining whether the diesel particulate filter enters into an abnormal regeneration condition or not according to a predetermined condition of an engine, and regenerating the diesel particulate filter according to the abnormal regeneration logic, if the accumulated time is within a predetermined time in a condition that the abnormal regeneration condition is satisfied and regenerating the diesel particulate filter according to the normal regeneration logic, if the accumulated time is out of the predetermined time. Accordingly, if the time elapses a predetermined time from a point that that the diesel particulate filter starts to be regenerated, although the vehicle enters into the idle condition or the over-run condition, the abnormal regeneration logic is not performed such that the fuel consumption is saved and the diesel particulate filter is safely regenerated.05-31-2012
20120159932ARRANGEMENT AND METHOD FOR OPERATING AN EXHAUST GAS AFTERTREATMENT DEVICE - The invention relates to an arrangement (06-28-2012
20100175369System for supplying a liquid for a vehicle and integrated pump/filter module - Supply system for a liquid comprising a liquid tank, a supply line, a pump, a filter and a device that makes it possible to purge the line, pump and filter and that comprises a non-return device preventing liquid from entering into these elements once they have been purged. In this system, the pump, filter and non-return device are combined in a compact module, the filter at least partly surrounding the pump and the non-return device being an integral part of a common housing that surrounds the filter and at least one part of the pump.07-15-2010
20120247089INSULATED MAIN NH3 CARTRIDGE SYSTEM WITH SEPARATE START-UP UNIT - A system and method relate to a reductant dosing for use in the reduction of NOx in an exhaust stream is disclosed. The system and method incorporates a separate first or start-up cartridge and an insulated mantel or housing containing at least one to a plurality of main cartridges. The first and main cartridges store an ammonia adsorbing/desorbing material, which releases ammonia gas upon application of sufficient heat. The start-up cartridge permits the initial release of ammonia gas into the exhaust stream even during start-up of an engine, and because it is separate from the main cartridge, the first cartridge cools faster than the main cartridge and can be replenished with ammonia sooner than the main cartridge. The start-up cartridge is housed in or surrounded by a non-insulating debris shield.10-04-2012
20120210699METHOD FOR OPERATING A SPARK-IGNITION INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS AFTERTREATMENT - Embodiments for regenerating a particle filter are provided. In one example, a method for operating a spark-ignition internal combustion engine having a particle filter for collecting and burning soot particles in exhaust gas comprises in order to initiate regeneration of the particle filter, increasing a particle filter temperature T08-23-2012
20120210696LOW TEMPERATURE NOx STORAGE SYSTEM FOR LEAN EXHAUST AFTERTREATMENT - Following a cold start of a hydrocarbon-fueled engine operated in a lean-burn-combustion mode, several seconds and minutes may be required for the exhaust gas stream to heat exhaust treatment devices in the exhaust system and conduit to their effective operating temperatures. The warm-up period may be particularly long for a NOx reduction catalyst (SCR) located downstream in the exhaust flow system. Accordingly, a bed of absorbent material, such as a suitably sized bed of alumina particles, located upstream of the SCR, is used to temporarily absorb water and NOx from a relatively cold exhaust until the exhaust has suitably heated the SCR to its operating temperature. Then, the warmed exhaust will remove the water and NOx from their temporary storage material and carry them to the reduction catalyst.08-23-2012
20120167556ENGINE EXHAUST AFTER-TREATMENT SYSTEM - An engine exhaust after-treatment system is provided, which may include a particulate trap configured to remove at least some constituents of the exhaust flowing from an engine through an exhaust system. The system may also include a controller configured to collect in-service data related to an operating parameter indicative of the amount of time the engine operates. In addition, the system may include a memory device attached to the particulate trap and including a memory. The memory may be configured to store usage data indicative of how much time the particulate trap has been used in service. The memory may be configured to communicate with the controller to receive information related to the in-service data collected by the controller and update the usage data in the memory, based on the communication with the controller, to reflect a total amount of time the particulate trap has been in service.07-05-2012
20120210697MULTI-LEG EXHAUST AFTER-TREATMENT SYSTEM AND METHOD - This disclosure provides an exhaust flow detection and variable dosing system and method for treating exhaust flow from an engine. The system includes first and second exhaust flow legs, a cross passage connecting these legs upstream of SCRs and a sensor positioned along the cross passage to detect at least one of differential pressure between the exhaust flow legs, and exhaust flow in the cross passage. A dosing circuit connects a dosing treatment supply to each of the exhaust flow legs at or upstream of the SCRs, and at least one dosing device positioned along the dosing circuit to control the amount of the dosing agent delivered to each exhaust leg. An electronic control unit controls the amount of a dosing agent delivered to the exhaust flow legs independently based on exhaust flows determined for each leg using at least one of the differential pressure and cross passage exhaust flow.08-23-2012
20120167555APPARATUS, SYSTEM, AND METHOD FOR ADAPTIVE ENGINE SYSTEM CONTROL WITH INTEGRATED GLOBAL POSITION SENSING - According to one embodiment, an apparatus includes an electronic controller (07-05-2012
20100050598Catalytic Converter Apparatus - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters.03-04-2010
20100050597LOW TEMPERATURE UREA INJECTION METHOD - The invention relates to a method for injecting urea in an exhaust line of an engine (03-04-2010
20120311995NOx ADSORBER CATALYST CONDITION EVALUATION APPARATUS AND ASSOCIATED METHODS - According to one embodiment, an apparatus for evaluating the condition of a NOx adsorber catalyst (NAC) of an internal combustion engine system includes a rich condition timing module, NAC outlet lambda module, and NAC condition module. The rich condition timing module is configured to accumulate the total time during which exhaust gas exiting the NAC has a lambda value less than 1.0. The NAC outlet lambda module is configured to store NAC outlet lambda values of the exhaust gas while the exhaust gas exiting the NAC has a lambda value less than 1.0. The NAC condition module is configured to evaluate the condition of the NAC based on the total time during which exhaust gas exiting the NAC has a lambda value less than 1.0 and an accumulation of the stored NAC outlet lambda values.12-13-2012
20120247086EXHAUST METHANE CONTROL SYSTEMS AND METHODS - A system for a vehicle, includes a conversion temperature determination module and a heating control module. The conversion temperature determination module generates a methane conversion temperature corresponding to a predetermined methane conversion efficiency. The heating control module selectively applies power to a substrate of an electrically heated catalyst (EHC) based on a temperature of the EHC and the methane conversion temperature. The EHC includes at least one catalyst that reacts with methane in exhaust output from an engine.10-04-2012
20120247088EXHAUST GAS AFTER-TREATMENT SYSTEM - An exhaust gas after-treatment system (10-04-2012
20120247085Compression Ignition Engine System With Diesel Particulate Filter Coated With NOx Reduction Catalyst And Stable Method Of Operation - An engine system includes an electronically controlled compression ignition engine configured to burn diesel fuel to produce an exhaust with a temperature and NOx to soot ratio. An aftertreatment system is fluidly connected to the engine and includes a diesel oxidation catalyst, a reductant supply, and a diesel particulate filter coated with a NOx reduction catalyst but not the diesel oxidation catalyst. A soot load density in the diesel particulate filter is stabilized by oxidizing soot at about a same rate as the compression ignition engine is supplying soot to the aftertreatment system without active regeneration. A NOx reduction reaction is catalyzed by the NOx reduction catalyst on the diesel particulate filter.10-04-2012
20100011743REGENERATION APPARATUS - A regeneration apparatus for a particulate filter of an exhaust gas system is provided which includes an exhaust gas duct and a catalyst which is integrated into the exhaust gas duct upstream of the particle filter. The exhaust gas system or the combustion engine includes an injection apparatus which is in communication with a fuel reservoir and is able to input fuel, in particular fuel containing hydrocarbons, into the exhaust gas flow. The regeneration apparatus includes a burner and at least one switching device. The burner is able to heat the catalyst to a reaction temperature at which an exothermic reaction of the fuel takes place. The switching device is able to activate and deactivate the burner and/or the injection apparatus selectively in dependence on an operating state of the exhaust gas system. An exhaust gas system for a combustion engine and a method for the regeneration of a particulate filter of an exhaust gas system are also provided.01-21-2010
20090056311Machine, engine system and operating method - A method of operating an engine system includes compressing intake air, restricting exhaust flow from the engine via a flow restriction device, and supplying compressor air to a compressed air subsystem of the engine during restricting exhaust flow. Supplying of compressor air may occur by selectively actuating a pressure control device to fluidly connect an inlet of a compressed air subsystem with the compressor. An associated machine and engine system include a compressor, a flow restriction device, a compressed air subsystem and a pressure control device to selectively fluidly connect the compressed air subsystem with the compressor when the flow restriction device is in a relatively more closed configuration.03-05-2009
20090056310Multi-Stage Regeneration of Particulate Filter - A method of regenerating a particulate filter in an apparatus comprising an internal combustion engine and a catalyst that employs urea as reductant for NOx is disclosed. The method comprises exposing the catalyst and particulate filter to a first, lower elevated exhaust temperature to remove urea deposits and/or stored hydrocarbon from the catalyst, and then exposing the catalyst and particulate filter to a second, higher elevated exhaust temperature to heat the particulate filter to decompose particulate matter in the particulate filter. In this manner, damage caused to the catalyst due to the decomposition and reaction of urea deposits and/or oxidation of stored hydrocarbon during particulate filter regeneration may be avoided.03-05-2009
20120311997NOX REMOVAL SYSTEM FOR BIOGAS ENGINES AT ANAEROBIC DIGESTION FACILITIES - Provided herein are methods, devices and systems comprising a reactor that is operatively connected to: (a) a biogas production unit for converting waste to a biogas stream; and (b) an engine that utilizes the biogas stream from the biogas producing unit to produce energy and an engine exhaust.12-13-2012
20120311996FILTERING METHOD AND FILTER FOR A NOX SENSOR OF AN EXHAUST GAS SYSTEM - Embodiments for determining NH12-13-2012
20120311994PARTICULATE FILTER MONITORING METHODS AND SYSTEMS - A method of monitoring regeneration of a particulate filter is provided. The method includes evaluating whether a regeneration event is based on a fixed threshold condition; selectively setting a pass or fail status based on the evaluating; and generating a message indicating the pass or fail status.12-13-2012
20120073266Process for the Removal of Harmful Substances from Exhaust Gases of Combustion Engines and Catalyst for Carrying Out Said Process - An integrated system for treatment of exhaust gases includes a NO03-29-2012
20120073265EXHAUST SYSTEM HAVING CROSS-SENSITIVE SENSOR - An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage, a reduction catalyst disposed within the exhaust passage, and an injection device configured to inject reductant into the exhaust passage. The exhaust system may also have a sensor configured to generate a signal indicative of a concentration of an exhaust constituent and the reductant, and a controller in communication with the sensor and the injection device. The controller may be configured to make a comparison of a value indicative of a rate of change of the signal for a period of time with a threshold amount, and make a determination of whether the sensor is sensing a concentration of the exhaust constituent or the reductant based on the comparison. The controller may also be configured to adjust operation of the injection device based on the determination.03-29-2012
20120073264REDUCTANT DOSING SYSTEM - A reductant dosing system for an engine is disclosed. The reductant dosing system may have a supply of reductant, a reservoir configured to hold pressurized reductant, and a pump configured to draw reductant from the supply and discharge reductant at an elevated pressure into the reservoir. The reductant dosing system may also have a plurality of injectors fluidly connected to the reservoir, and a drain valve fluidly connected between the reservoir and the supply.03-29-2012
20120255278RECONFIGURABLE BI-METALLIC MIXER FOR AN EXHAUST AFTERTREATMENT SYSTEM AND METHOD OF USING THE SAME - A mixer for an exhaust aftertreatment system is disclosed. The mixer includes a body portion that is configured to be disposed in an exhaust conduit of an exhaust aftertreatment system upstream of an exhaust aftertreatment device. The mixer also includes an airfoil portion that is disposed on the body portion and reversibly movable between a deployed position and a retracted position, wherein in the deployed position the airfoil portion provides a deployed resistance to an exhaust gas flow and in the retracted position provides a retracted resistance thereto, and the deployed resistance is greater than the retracted resistance, the body portion and airfoil portion comprising a mixer. The mixer further includes a bimetallic couple that is operatively joined to the mixer and configured to reversibly move the airfoil portion from the retracted position to the deployed position.10-11-2012
20120255280METHOD FOR MONITORING A CATALYTIC CONVERTER - A method for monitoring the capability of a catalytic converter to convert nitrogen monoxide into nitrogen dioxide in the exhaust gas of an internal combustion engine, the catalytic converter being arranged in an exhaust gas duct of the internal combustion engine and the catalytic converter being followed downstream by a collecting particle sensor. It is in this case provided that, in a monitoring cycle, a decrease in the particle loading of the particle sensor during the operation of the internal combustion engine under predetermined operating conditions is taken to conclude an adequate capability of the catalytic converter to convert from nitrogen monoxide to nitrogen dioxide.10-11-2012
20120255277OFFSET AND SLOW RESPONSE DIAGNOSTIC METHODS FOR NOx SENSORS IN VEHICLE EXHAUST TREATMENT APPLICATIONS - A method that includes in-vehicle systems and practices for determining whether a NOx sensor in an exhaust stream is performing properly.10-11-2012
20120186234DIESEL PARTICULATE FILTER CONTROL - Methods and systems are provided for managing particulate emissions in an engine including a particulate filter and a CO07-26-2012
20120186233DEVICE AND METHOD FOR TREATING EXHAUST GAS CONTAINING SOOT PARTICLES AND MOTOR VEHICLE HAVING THE DEVICE AND CARRYING OUT THE METHOD - A device for treating exhaust gas containing soot particles, includes at least one ionization element for ionizing soot particles and at least one separation device having a surface precipitator for depositing ionized soot particles. The at least one surface precipitator includes at least two at least partially electrically conductive neutralization regions that are electrically insulated from each other in order to neutralize ionized soot particles. A method for converting soot particles of an exhaust gas includes applying different electric potentials. A motor vehicle includes the device and carries out the method.07-26-2012
20120186230DETECTION APPARATUS - A detection apparatus includes a detection unit, a control unit, a first setting unit, and a second setting unit. The detection unit is disposed in an exhaust path through which an exhaust gas flows, and detects a correlation value correlated with an amount of particulate matter (PM) attaching to an attachment element. The control unit controls a temperature of the attachment element to follow a target temperature while a regeneration process is performed to heat the attachment element so as to burn PM. The first setting unit sets the target temperature to be lower, as the amount of PM becomes larger. The second setting unit sets a completion timing of the regeneration process so that a period of the regeneration process becomes longer, as the amount of PM becomes larger or a temperature of the attachment element becomes lower while the regeneration process is performed.07-26-2012
20120186229ZONED CATALYTIC FILTERS FOR TREATMENT OF EXHAUST GAS - Provided is an SCRF article having different SCR catalysts compositions disposed on a wall-flow filter substrate in zones that are arranged in series with respect to the inlet and outlet faces of the substrate. Also provided is method of reducing backpressure and ammonia slip that involves the use of such SCRF articles.07-26-2012
20120186228PARTICLE FILTER AND METHOD FOR THE PURIFICATION OF AN EXHAUST-GAS FLOW - Particle filters and a method for the purification of an exhaust-gas flow are described. In one example, exhaust gas is directed solely to a first particulate filter until a predetermined condition. Then exhaust gas is directed to a second particulate filter. One particulate filter may surround the other of two particulate filters. The particulate filters may provide filtered exhaust gas even when one filter becomes at least partially loaded.07-26-2012
20120186227PARTICLE SENSOR, EXHAUST SYSTEM AND METHOD FOR DETERMINING PARTICLES IN THE EXHAUST GAS - Embodiments of a particle sensor are provided. In one example, a particle sensor for an exhaust system comprises at least two inlet openings for an exhaust-gas flow of the exhaust system, wherein the inlet openings are of different sizes, and at least two sensor elements, wherein in each case one sensor element is arranged downstream of one inlet opening. In this way, the relative proportion of different-sized particles within the exhaust-gas flow may be determined.07-26-2012
20120186226APPARATUS AND METHOD FOR ONBOARD PERFORMANCE MONITORING OF OXIDATION CATALYST - A method and system for determining conversion of NO to NO07-26-2012
20120186225Methods And Apparatus To Detect And Inhibit Low-Speed Pre-Ignition In An Engine - The disclosure provides a method of detecting and inhibiting an abnormal combustion event in an internal combustion engine, comprising operating the internal combustion engine to produce exhaust gas from the cylinder at a break mean effective pressure greater than or equal to 10 bars at a speed less than or equal to 2,000 revolutions per minute; monitoring the exhaust gas from the cylinder with an oxygen sensor while the internal combustion engine undergoes a pre-ignition combustion event; obtaining an output from the oxygen sensor, the output from the oxygen sensor providing an indicator of the pre-ignition combustion event; and adjusting at least one operating parameter of the internal combustion engine in response to the output of the oxygen sensor, wherein the at least one operating parameter is adjusted to inhibit an occurrence of a subsequent pre-ignition combustion event.07-26-2012
20120186232Method for Controlling Injection Amount of Fuel of Burner and Aftertreating Device of Exhaust Gas - Disclosed is a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, and more particularly, to a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, in which the burner is controlled in consideration of exothermic effect due to a catalytic filter, thereby stably reducing exhaust gas.07-26-2012
20120186231EXHAUST GAS AFTER TREATMENT SYSTEM WITH TEMPERATURE CONTROL - A vehicle emission control system is configured to operatively receive exhaust gas from a combustion engine and includes an exhaust gas after treatment system (EATS) configured to operatively clean the received exhaust gas, a burner unit configured to operatively heat the received exhaust gas to a predetermined temperature before the exhaust gas is provided to the EATS, and a pump unit configured to operatively provide the burner unit with air to be used by the burner unit in a heating process. The pump unit is configured to be operatively propelled by exhaust gas, and the burner unit is arranged upstream the pump unit such that exhaust gas from the burner unit is operatively provided to the pump unit for propelling the pump unit.07-26-2012
20120255283EXHAUST SYSTEM COMPRISING EXOTHERM-GENERATING CATALYST - An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.10-11-2012
20120255282CONTROL DEVICE AND CONTROL METHOD FOR REDUCTION AGENT INJECTION VALVE - A controller and method of a reducing agent injector capable of accurately providing a required amount of ammonia to a reduction catalyst.10-11-2012
20080314020Reduction of NOx Trap at Engine Shutoff - The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises detecting an engine shutoff, determining an engine stop position, and creating a reductive environment in the exhaust conduit upstream of the lean NOx trap at a time based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.12-25-2008
20120227383METHOD FOR CONTROLLING A SYSTEM FOR THE TREATMENT OF EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for controlling a system for the treatment of exhaust gases in an exhaust line of an internal combustion engine. The method comprises estimating the molar ratio of nitrogen dioxide to nitrogen monoxide at the inlet of an NOx selective reduction catalyst based on cartography that is dependent on the residence time of the exhaust gases in an oxidation catalyst disposed upstream of the gas treatment means leading to a reduction of nitrogen oxides.09-13-2012
20120227382PARTICULATE FILTER REGENERATION DURING ENGINE SHUTDOWN - Various systems and method are described for controlling an engine having an exhaust system which includes a particulate filter. One example method comprises, after shutting down the engine and spinning down the engine to rest, operating a vacuum pump to draw fresh air through the exhaust system to an intake system, and regenerating at least a portion of the particulate filter during the engine rest.09-13-2012
20120227378Method For Protecting An Engine During A Parked Regeneration Of A Particulate Filter - An automatic shutdown system is provided in which a work vehicle is shutdown upon an occurrence of a critical fault; i.e., an occurrence of a condition which could diminish the life or cause a complete failure of at least a portion of the work vehicle.09-13-2012
20120227377Method for Diagnosing Operation of a Particulate Matter Sensor - A method for diagnosing a particulate matter sensor is described. In one example, a liquid is purposefully injected into the exhaust system to verify operation of the particulate matter sensor. Reliability of particulate matter diagnostics may be improved by way of the approach, at least during some conditions.09-13-2012
20120227381PARTICULATE FILTER REGENERATION PROCESS DIAGNOSTIC - A system for the treatment of exhaust gases includes an engine, an exhaust system, and a controller. The exhaust aftertreatment system is configured to accept exhaust gas from the engine and includes a particulate filter configured to filter particulate matter from the exhaust gas. A controller is configured to determine an actual temperature of the particulate filter during a regeneration process and analyze the actual temperature relative to a temperature deviation threshold. The controller is configured to adjust the temperature deviation threshold in real time based, at least in part, on an operating condition of the engine and a mass flow of the exhaust gas.09-13-2012
20100326053METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - An internal combustion engine with multiple cylinders and injection valves that are provided for the cylinders and that meter fuel also comprises an exhaust gas tract in which an exhaust gas catalytic converter is arranged. A characteristic value (OSC) of an oxygen storage capacity of the exhaust gas catalytic converter is determined. In accordance with the characteristic value (OSC), a heating measure (HM) for heating the exhaust gas catalytic converter is carried out.12-30-2010
20100326052METHOD FOR MONITORING AMMONIA STORAGE IN AN EXHAUST AFTERTREATMENT SYSTEM - A method for monitoring the ammonia-selective catalyst reduction device includes monitoring states of parameters of the exhaust gas feedstream upstream of the ammonia-selective catalyst reduction device, analytically segmenting the ammonia-selective catalyst reduction device into a plurality of discrete substrate elements, sequentially calculating a change in ammonia storage for each of the discrete substrate elements, and determining a total ammonia storage concentration on the ammonia-selective catalyst reduction device based upon the sequentially calculated change in ammonia storage for each of the discrete substrate elements.12-30-2010
20100326051Operating and Diagnostic Method for an SCR Exhaust-Gas Aftertreatment System - The invention relates to In an operating and diagnostic method for an SCR exhaust gas aftertreatment system which has an SCR catalytic converter with ammonia storage capacity, a signal of an exhaust gas sensor that is sensitive to nitrogen oxide and ammonia and is arranged downstream of the SCR catalytic converter, is measured. In a normal operating mode, ammonia is supplied to the SCR catalytic converter corresponding to a filling level model for ammonia stored in the SCR catalytic converter, in such a way that the ammonia filling level of the SCR catalytic converter is held at least approximately at a predefinable nominal value (or value range). The normal operating mode is interrupted if an exhaust gas sensor signal that exceeds a predefinable first limit value, is registered, and the set urea dosing rate is increased by a predefinable degree in relation to the value provided in the normal operating mode. Thereafter, a return is made to the normal operating mode, or a switch is made to a diagnostic operating mode, as a function of the profile of the signal of the exhaust gas sensor.12-30-2010
20110120091METHOD AND APPARATUS FOR MONITORING THE LIGHT-OFF TEMPERATURE OF A DIESEL OXIDATION CATALYST - A method is provided for monitoring the light-off temperature of a diesel oxidation catalyst of a combustion engine. The method includes, but is not limited to measuring the temperature of the exhaust gas upstream and downstream of the diesel oxidation catalyst during a post injection phase or after injection phase of the combustion engine, determining whether a catalyst light-off occurred by using the temperature data of the exhaust gas, calculating the surface temperature of the diesel oxidation catalyst by using the measured temperature data of the exhaust gas, and defining the calculated temperature as light-off temperature of the diesel oxidation catalyst in the case that a catalyst light-off is determined. By means of the method, it is possible to determine the actual light-off temperature of the diesel oxidation catalyst for instance after each engine start by means of calculating the surface temperature of the diesel oxidation catalyst. Since the light-off temperature is not considered as a constant but as a changing variable, the aging of the diesel oxidation catalyst is sufficiently considered. Thus, it is provided a means for monitoring the light-off temperature of a diesel oxidation catalyst considering an aging of the diesel oxidation catalyst.05-26-2011
20110120094METHOD OF REGENERATING AN EXHAUST GAS PURIFICATION FILTER, AND VAPORIZER - A method of regenerating an exhaust gas purification filter, in particular for internal combustion engines, uses a vaporized liquid that is to be introduced into the exhaust gas flow. A surface temperature of a heating element in a vaporizer chamber is limited to a maximum of 700 to 750° C.05-26-2011
20110120093PROCESS AND APPARATUS FOR PURIFYING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE - The present invention relates to a process for purifying NO05-26-2011
20110120092METHOD FOR CONTROLLING FLUID INJECTED QUANTITY IN A NOX REDUCTION SYSTEM EMPLOYING A SCR CATALYIST - A method is provided for controlling fluid injected quantity in a NO05-26-2011
20110120090Processes And Devices For Regenerating Gasoline Particulate Filters - Processes and devices for regenerating a gasoline particulate filter utilized in filtering an exhaust stream of a direct-injection gasoline engine operating at substantially stoichiometric conditions include introducing an amount of oxygen into the exhaust stream downstream of the engine and upstream of the gasoline particulate filter, and regenerating the gasoline particulate filter by passing the exhaust stream enriched with the amount of oxygen through the gasoline particulate filter.05-26-2011
20110120089EXHAUST PARTICULATE MANAGEMENT FOR GASOLINE-FUELED ENGINES - A thin layer of low mean-pore-size filter material that permanently accommodates the accumulation of exhaust particulates (as soot or a soot cake) is carried on a porous ceramic support. The supported filter material is closely coupled with the exhaust manifold of the engine, for the purpose of passive regeneration of stored particulates, and removes particulate matter from the exhaust which is directed through the filter layer and ceramic support. The oxygen content of the exhaust oxidizes the particulate matter on the filter material. In a preferred embodiment, a thin layer of the filter material is supported on inlet channel walls of a wall flow-through ceramic filter body to remove the particles from the exhaust. The filter body comprises an upstream exhaust gas flow inlet face with openings to a plurality of inlet channels and a downstream face with a like plurality of openings from outlet channels. The inlet channels are closed at the downstream face and the outlet channels are closed at the inlet face. So the exhaust stream enters the inlet channels and flows through the filter layers and supporting channel walls to an outlet channel. The filtered exhaust stream exits the outlet end of the filter body and is combined into an exhaust passage downstream of the filter body for further treatment as may be necessary.05-26-2011
20110120088Mass Based Methods And Systems For Estimating Soot Load - Mass based methods and systems for estimating soot load in a filter of an after-treatment system for exhaust stream are provided. The after-treatment system can comprise a sensor, a filter, and a processor configured to estimate soot load in the filter based on a mass based multi-layer model. An example system includes a virtual sensor comprising an estimator for providing information corresponding to a filter outlet NO05-26-2011
20110120087Apparatus with Catalyst for the Reduction of Nitrogen Dioxide (NO2) to Nitric Oxide (NO) by Chemical Means in a Diesel Catalytic Support - In setting tighter emissions standards for nitrogen oxides, legislative bodies limit the amount of nitrogen dioxide (NO05-26-2011
20120260635TREATMENT OF DIESEL ENGINE EXHAUST - A diesel exhaust treatment system for treating exhaust gas from a diesel engine comprises at least one diesel particulate filter, at least one diesel exhaust fluid mixing chamber and at least one selective catalytic reduction converter (SCR). In one desirable embodiment, plural diesel particulate filters are arranged in parallel and plural SCRs are arranged in parallel. These components including the diesel exhaust fluid mixing chamber can be included in a common housing with the exhaust flow reversing directions a plurality of times as it passes through the treatment system from an exhaust inlet to an exhaust outlet. The housing can be coupled to one vehicle frame rail with most of the housing and components contained therein positioned outside the outer surface of the one frame rail.10-18-2012
20120260629System and Method for Liquid Reductant Injection - A method for operating a liquid reductant injection system is provided. The method includes storing a reductant mixture of ethanol, water, and urea; drawing the stored mixture into an electrically heated pick-up tube for delivery via a delivery line to the exhaust by operating a pump in a first direction; and, clearing a return line that returns the stored mixture or the delivery line by operating the pump in a second, reverse, direction. In this way, by including ethanol in the reductant solution, a freezing point temperature of the liquid reductant may be reduced.10-18-2012
20120260627INTERNAL COMBUSTION ENGINE WITH EMISSION TREATMENT INTERPOSED BETWEEN TWO EXPANSION PHASES - An internal combustion engine has a first work extraction station for extracting work from combustion and expansion of working gases. An emission treatment station treats the working gases after leaving the first extraction work station for reducing emissions. A second work extraction station receives the working gases from the emission treatment station for a second extraction of work from the working gases.10-18-2012
20120260633AFTERTREATMENT SYSTEM AND CONTROL STRATEGY FOR INTERNAL COMBUSTION ENGINE - In an exhaust gas treatment device in which a diesel oxidation catalyst and a DPF are provided in an exhaust pipe of an internal combustion engine, abnormal combustion in the DPF, occurring when the internal combustion engine varies from a high load condition to a low load condition, poses a problem. To solve this problem, in the present invention, a DPF abnormal combustion causing operation is determined to have occurred when the internal combustion engine shifts from a high rotation or high load operation region α to a low rotation, low load operation region β within a set time T10-18-2012
20120260632METHOD FOR OPERATING A DELIVERY DEVICE FOR A REDUCING AGENT AND MOTOR VEHICLE HAVING A DELIVERY DEVICE - A method for operating a reducing agent delivery device having a liquid reducing agent tank, an injector dispensing reducing agent into an exhaust treatment device, an internal combustion engine and a reducing agent line from tank to injector, includes conveying the reducing agent from tank to injector with a pump and providing a pressure sensor in the line. The method includes, repeatedly: determining and providing supply pressure for the injector in the delivery device with the pump, calculating an injector opening time from a determined injection volume and supply pressure and opening the injector at the calculated injector opening time. A venting procedure at a point in time includes: determining an increase of a pressure conveying volume characteristic in the delivery device, calculating an air bubble volume by comparing the increase to a target increase, and conveying a conveying volume through the injector. A motor vehicle is also provided.10-18-2012
20120260631Method and device for regenerating a particle filter in a y-exhaust gas system - A method and device for regenerating an exhaust gas aftertreatment component for filtering soot particles in an engine having a first cylinder group, exhaust gases being guided through an exhaust gas channel and whose fuel/air mixture ratio is set via a fuel metering system, activated via a control unit, by a control loop for setting a lambda value using a signal of a first exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, having at least another cylinder group, exhaust gases being guided through another exhaust gas channel and whose fuel/air mixture ratio is set via another fuel metering system by another control loop for setting another lambda value based on the signal of another exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, the separate channels joined together downstream to form a shared channel, having a shared catalytic converter.10-18-2012
20120260628TREATMENT OF COLD START ENGINE EXHAUST - A method of treating a cold-start engine exhaust gas stream comprising hydrocarbons and other pollutants, the method comprising: flowing the exhaust gas stream over a molecular sieve bed, the molecular sieve bed comprising an alkali metal cation-exchanged molecular sieve having intersecting 10- and 12-membered ring pore channels, to provide a first exhaust stream; flowing the first exhaust gas stream over a catalyst to convert any residual hydrocarbons and other pollutants contained in the first exhaust gas stream to innocuous products to provide a treated exhaust stream; and discharging the treated exhaust stream into the atmosphere.10-18-2012
20120260634NOx CONTROL SYSTEMS AND METHODS FOR CONTROLLING NOx EMISSIONS - An exhaust aftertreatment system comprising a selective reduction catalyst, a NO10-18-2012
20120260630COMBINED ENGINE OUT NOX MANAGEMENT - An apparatus for controlling engine operations to a low NOx output amount at low selective catalytic reduction (SCR) temperature values and alternatively for controlling engine operations in an EGR cooler bypass regime at low engine load levels is described. The apparatus includes a controller that interprets a present speed and a present load of an engine, that determines an engine operating region in response to the present speed and the present load, and that provides an EGR cooler bypass command that provides EGR cooler bypass flow in response to the engine operating region being a first, low load, region. The controller operates the engine with supplemental NO10-18-2012
20110030346Treatment System for Gasoline Engine Exhaust Gas - The present invention relates to a treatment system for a gasoline engine exhaust gas stream comprising a particulate filter, said particulate filter comprising: a particulate filter substrate, an inlet layer disposed on the exhaust gas inlet surface of the filter substrate, and an outlet layer disposed on the exhaust gas outlet surface of the filter substrate, wherein the inlet layer comprises Rh and/or Pd, and the outlet layer comprises Rh and/or a zeolite.02-10-2011
20120297752Engine System With Exhaust-Cooled Fuel Processor - An engine system comprises a fuel processor that is supplied with air and a fuel stream to produce a hydrogen-containing gas stream. The fuel processor comprises a housing, and at least a portion of the housing is located within an exhaust stream conduit from the engine. During operation of the engine, heat transfer between the fuel processor and the engine exhaust stream occurs. An exhaust after-treatment assembly is located downstream of the fuel processor and is connected to selectively receive hydrogen-containing gas stream from the fuel processor.11-29-2012
20120297751METHOD FOR DETERMINING LOAD OF A PARTICULATE FILTER - A particulate filter is monitored for a particulate matter load when fluidly coupled to an internal combustion engine. Monitoring of the particulate filter is achieved by determining a rate of production of particulate matter from the internal combustion engine, a rate of capture of the particulate matter within the particulate filter, a regeneration rate for the particulate filter, and an amount of particulate matter collected in the particulate filter.11-29-2012
20120297750METHOD FOR MONITORING AN EXHAUST PARTICULATE FILTER - An exhaust aftertreatment system having a particulate filter is monitored by monitoring a particulate filter regeneration event and detecting an associated regeneration period. The particulate filter regeneration period is compared to a preferred event window. A fault is detected when the monitored particulate filter regeneration period extends beyond the preferred event window.11-29-2012
20110047971DOSING CONTROL SYSTEMS AND METHODS - A dosing control system for a vehicle includes a pump control module and an enabling/disabling module. The pump control module controls a pump that provides dosing agent to a dosing agent injector located upstream of a selective catalytic reduction (SCR) catalyst in an exhaust system. The enabling/disabling module disables the pump for a predetermined melting period after engine startup when the dosing agent is frozen and selectively activates the pump during the predetermined melting period to cool the dosing agent injector when a tip temperature of the dosing agent injector is greater than a predetermined temperature.03-03-2011
20110047968Method and Apparatus for De-Sulfurization on a Diesel Oxidation Catalyst - A diesel exhaust after-treatment system (03-03-2011
20110219748PARTICULATE MATTER PURIFYING MATERIAL, FILTER CATALYST FOR PURIFYING PARTICULATE MATTER USING PARTICULATE MATTER PURIFYING MATERIAL, AND METHOD OF REGENERATING FILTER CATALYST FOR PURIFYING PARTICULATE MATTER - A particulate matter purifying material is used for a filter catalyst for purifying particulate matter that is disposed in an exhaust gas flow path of an internal combustion engine, traps the particulate matter in exhaust gas generated in the internal combustion engine, and burns the particulate matter to be deposited, so as to be regenerated. The particulate matter purifying material includes an oxide containing cerium (Ce) having an oxygen storage-release capacity, and at least one metal (Me) selected from the group consisting of Zr, Y, La, Pr, Sr, Nb and Nd, wherein a content ratio (Ce:Me) of cerium to the metal is 6:4 to 9:1 in terms of an atomic ratio, and a degree of crystallinity (CR) represented by the following formula (1) is within a range of 25 to 60%:09-15-2011
20110225950Control strategy for heated fluid lines - A control strategy selectively controls the heating of fluid lines equipped with line heaters that may be utilized with a selective catalytic reduction system. The control strategy measures a tank temperature representative of reductant agent in a storage tank and a representative ambient temperature representative of an ambient temperature proximate the fluid line. The control strategy determines a lowest possible reductant agent temperature (“LPRAT”) based on the measured tank temperature and representative ambient temperature. The LPRAT is compared with a desired reductant agent temperature and, in response to the comparison, the control strategy may activate the line heater.09-22-2011
20120317959DIAGNOSTIC SYSTEM AND METHOD FOR AN OXYGEN SENSOR POSITIONED DOWNSTREAM FROM A CATALYTIC CONVERTER - A system according to the principles of the present disclosure includes a diagnostic execution module and a diagnostic disabling module. The diagnostic execution module diagnoses a fault in at least one of an oxygen sensor and a catalytic converter based on input received from the oxygen sensor. The diagnostic disabling module disables the diagnosing based on at least one of a temperature of the catalytic converter and a mass flow rate of air flowing through the catalytic converter.12-20-2012
20120079812EXHAUST GAS PURIFICATION APPARATUS OF ENGINE AND EXHAUST GAS PURIFICATION METHOD OF ENGINE - A control unit calculates an amount of produced ammonia from an amount of a dosed urea aqueous solution according to an engine operation state, and calculates a NOx purification ratio in the case of dosing the amount of the dosed urea aqueous solution according to the operation state to exhaust gas on an exhaust upstream side of an SCR catalyst. Moreover, the control unit estimates an amount of adsorbed ammonia to the SCR catalyst based on the produced ammonia amount and the NOx purification ratio. Then, the control unit subtracts the amount of the urea aqueous solution corresponding to the amount of the adsorbed ammonia from the amount of the dosed urea aqueous solution according to the operation state to correct the amount of the dosed urea aqueous solution, and controls the dosing of the urea aqueous solution based on the corrected amount of the dosed urea aqueous solution.04-05-2012
20120079811CONTROL SYSTEM FOR A TWO-STROKE LOCOMOTIVE DIESEL ENGINE HAVING AN EXHAUST AFTERTREATMENT SYSTEM - The present application generally relates to a diesel engine and, more particularly, to a control system and method for an exhaust aftertreatment system for a locomotive diesel engine. In accordance with an embodiment of the present system, a two-stroke uniflow scavenged diesel engine system including an exhaust aftertreatment system is described for reducing NO04-05-2012
20110265454Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.11-03-2011
20110265453Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.11-03-2011
20110265452AMMONIA SENSOR CONTROL OF AN SCR AFTERTREATMENT SYSTEM - A system includes an engine, an exhaust conduit for the engine, a first SCR catalyst fluidly coupled to the exhaust conduit, and a second SCR catalyst fluidly coupled to the exhaust conduit at a position downstream of the first SCR catalyst. The system further includes an ammonia sensor positioned between the first and second SCR catalysts. A reductant doser is positioned upstream of the first SCR catalyst. The system includes a controller that determines an amount of NH11-03-2011
20110265450POST-COMBUSTION FUEL INJECTION CONTROL SYSTEMS AND METHODS - An exhaust control system comprises a total loss determination module and a fuel control module. The total loss determination module determines a total energy loss rate of exhaust upstream of a location in an exhaust system based on a convective energy loss rate upstream of the location, a conductive energy loss rate upstream of the location, and an oxidation energy gain rate upstream of the location. The fuel control module receives a target temperature for the exhaust at the location and determines a target input energy rate based on the target temperature, a temperature of exhaust input to the exhaust system, and the total energy loss rate. The fuel control module controls a rate of fuel injection into the exhaust system upstream of an oxidation catalyst based on the target input energy rate.11-03-2011
20100229535METHOD FOR REMEDIATING EMISSIONS - A method for remediating a NOx-containing lean diesel emission includes providing a LNT/SCR catalyst system including a SCR catalyst and a first and second LNT. The SCR catalyst is disposed downstream of the second LNT which is disposed downstream of the first LNT. The lean NOx-containing diesel emission is introduced to the first LNT with the NOx being absorbed on to the first LNT forming a substantially NOx-free lean diesel emission. An exotherm generating agent is introduced to the substantially NOx-free diesel emission between the first LNT and the second LNT to form a reactive lean diesel emission. The reactive lean diesel emission is introduced to the second LNT generating a quantity of heat effective for desorbing absorbed NOx. A reducing agent is introduced into the desorbed NOx between the second LNT and SCR catalyst. The desorbed NOx diesel emission is remediated in the SCR catalyst.09-16-2010
20100229534ADDITION VALVE CONTROL METHOD AND ADDITION VALVE CONTROLLER - To suppress clogging of an injection nozzle that supplies fuel to an exhaust passage of an engine, a controller executes intermittent addition of fuel from the injection nozzle. In executing the intermittent addition, the controller calculates a particulate discharge amount within the exhaust passage based on the engine operation state, and multiplies the exhaust gas temperature by the intake air rate to calculate the exhaust energy. Then, based on the particulate discharge amount and the exhaust energy, the controller calculates the amount of fuel to be added.09-16-2010
20100229533PEROVSKITE-TYPE COMPOUNDS FOR USE IN LEAN NOx TRAPS - An exhaust aftertreatment system for a lean-burn engine may include a lean NO09-16-2010
20100229532CONTROL UNIT AND CONTROL METHOD FOR REDUCTANT SUPPLY SYSTEM - There are provided a control unit and a control method for a reductant supply system, which are capable of reducing energy consumption by immediately stopping heating means in the case of entering an idling stop mode. A control unit which performs control of a reductant supply system includes an idling stop determination portion that determines whether an internal combustion engine is stopped by idling stop control that automatically stops the internal combustion engine, a heating means operation determination portion that determines whether the heating means provided in the reductant supply route that supplies the liquid reductant to the reductant injection valve is in operation, and a heating means control portion that stops operation of the heating means in a state where the internal combustion engine is automatically stopped and the heating means is in operation.09-16-2010
20100229531APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING REDUCTANT DOSING IN AN SCR CATALYST SYSTEM - According to one representative embodiment, an apparatus for controlling reductant dosing in an SCR catalyst system having a reductant injection system configured to inject reductant into an exhaust gas stream includes a controller, an actual reductant dosing rate module, and a reductant doser compensation module. The controller is configured to determine a reductant dosing rate command representing a desired reductant dosing rate. The actual reductant dosing rate module is configured to determine a predicted actual reductant dosing rate based at least partially on the reductant dosing rate command. The reductant doser compensation module is configured to determine a modified reductant dosing rate command based at least partially on the predicted actual reductant dosing rate. The reductant injection system injects reductant into the exhaust gas stream at a rate corresponding to the modified reductant dosing rate command.09-16-2010
20100229530CONTROL DEVICE AND CONTROL METHOD FOR EXHAUST GAS PURIFICATION APPARATUS, AND INTERNAL COMBUSTION ENGINE EXHAUST GAS PURIFICATION APPARATUS - There are provided a control device and a control method for an exhaust gas purification apparatus that can prevent the actual adsorption amount from becoming excessively lower than the saturated adsorption amount and can prevent the reduction efficiency of the reduction catalyst from degrading even when the temperature of catalyst continues to shift to a low temperature side for a predetermined time or longer. The device includes: a temperature transition determining means for predicting a transition of the temperature of the reduction catalyst and determining whether or not the temperature of the reduction catalyst continues to decrease for a predetermined time or longer; a first injection controlling means for injecting the reducing agent according to a first target adsorption amount that is a smaller value than a saturated adsorption amount of the reducing agent corresponding to the temperature of the reduction catalyst if it is determined that the temperature of the reduction catalyst does not decrease continuously for a predetermined time or longer; and a second injection controlling means for injecting the reducing agent according to a second target adsorption amount that is a value larger than the first target adsorption amount and smaller than the saturated adsorption amount if it is determined that the temperature of the reduction catalyst continuously decrease for a predetermined time or longer.09-16-2010
20120279202METHOD FOR EXHAUST GAS-RECIRCULATION - A method for exhaust gas recirculation (EGR), in particular in internal combustion engines, in particular for reducing NOx emission, by actuating an EGR valve (11-08-2012
20120279201DEVICE, METHOD, AND SYSTEM FOR EMISSIONS CONTROL - Various embodiments for an exhaust gas treatment device are provided. In one example, the exhaust gas treatment device includes a first substrate coated with a low temperature catalyst configured to operate under a first, low temperature range. The exhaust gas treatment device further includes a second substrate coated with a high temperature catalyst positioned downstream of the first substrate, the high temperature catalyst configured to operate under a second, high temperature range. Further, in the first and second temperature ranges, particulate matter is oxidized at the second substrate.11-08-2012
20110271657CONTROL SYSTEM AND METHOD FOR IMPROVED EFFICIENCY OF PARTICULATE MATTER FILTER REGENERATION - An engine control system includes an injection determination module and an injection distribution module. The injection determination module determines a desired amount of hydrocarbons (HC) to inject into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection distribution module controls a ratio of auxiliary injection to post-combustion injection based on engine load, engine speed, and the desired amount of HC injection, wherein auxiliary injection includes injecting HC into the exhaust gas, and wherein post-combustion injection includes injecting HC into cylinders of the engine during a period after combustion.11-10-2011
20110283676SYSTEMS AND METHODS FOR ABATING CARBON MONOXIDE IN AN EXHAUST STREAM - A method for abating carbon monoxide in an exhaust stream may include injecting an amount of air into the exhaust stream to produce an air/exhaust mixture; measuring an air/fuel ratio of the air/exhaust mixture; reacting carbon monoxide in the air/exhaust mixture with oxygen in the presence of a catalyst to produce carbon dioxide to abate carbon monoxide in the air/exhaust mixture; measuring a temperature of the catalyst; and adjusting the amount of air injected into the exhaust stream based on the air/fuel ratio or the temperature of the catalyst.11-24-2011
20110283675HYBRID CATALYST CONVECTIVE PREHEATING SYSTEM - A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first temperature of a non-EHC of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and generate a mode signal based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to an EHC of the catalyst assembly based on the mode signal.11-24-2011
20110289903DEVICE AND METHOD FOR REGENERATING A PARTICULATE FILTER ARRANGED IN THE EXHAUST SECTION OF AN INTERNAL COMBUSTION ENGINE - A device and a method for regenerating a particulate filter that is arranged in the exhaust tract of an internal combustion engine. There is disposed at least one NO oxidation catalytic converter upstream of the particulate filter for the oxidation of NO, and in particular to form NO12-01-2011
20120324867CONTROL OF EMISSIONS - A diesel engine aftertreatment system comprises a diesel engine having an exhaust manifold and a filter substrate in direct connection with the exhaust manifold without any intervening catalyst, wherein the filter substrate comprises on its inlet side an SCR catalyst incorporating a non-coking molecular sieve.12-27-2012
20120090300TURBO SCREEN - The present invention generally relates to methods and apparatus for use in exhaust manifold assemblies of large diesel engines, such as ships, locomotives and the like. In one aspect, a screen for use in an exhaust manifold assembly is provided. The screen includes a plate formed in a concave shape. The plate has a plurality of apertures and a plurality of radially oriented closed slots formed therein. The screen further includes a band on an outer perimeter of the plate. In another aspect, a reducer assembly for use in an exhaust manifold assembly is provided. In yet a further aspect, a method of using a screen in an exhaust manifold assembly is provided.04-19-2012
20120090294CONTROL OF AFTERTREATMENT REGENERATION IN A HYBRID POWERED VEHICLE - A method for controlling aftertreatment regeneration for a system having a hybrid powertrain is described. The method includes determining that an engine aftertreatment regeneration is indicated when a regeneration request index exceeds a first threshold. The method includes determining an acceptable battery usage amount based on a current battery state of charge (SOC) and a minimum battery SOC. The method further includes determining a battery usage amount for an engine aftertreatment regeneration operation. The method includes initiating an engine aftertreatment regeneration when the battery usage amount is less than or equal to the acceptable battery usage amount.04-19-2012
20120090299Method to reduce the ignition temperature of soot being accumulated on a particulate trap - A method for lowering the ignition temperature of soot accumulated on a particulate filter 04-19-2012
20120090298ENGINE COMBUSTION CONDITION AND EMISSION CONTROLS - Features relating to engine efficiency and emissions controls are described. Systems, methods, articles or manufacture and the like can include features relating to integrated muffler and emissions controls for engine exhaust, water-injected internal combustion engine with an asymmetric compression and expansion ratio, controlled combustion durations for HCCI engines, piston shrouding of sleeve valves, low element count bearings, improved ports, and premixing of fuel and exhaust.04-19-2012
20120090296METHOD FOR MEASURING THE QUALITY OF AMMONIA INJECTION FOR AN EXHAUST GAS AFTER TREATMENT SYSTEM OF A VEHICLE - A system and method for determining ammonia deposition and controlling an engine is described. In one example, an amount of ammonia deposited in an engine exhaust is determined and the deposited ammonia is purged after the amount of ammonia deposited reaches a threshold level. The method may decrease ammonia use and ammonia emissions from a vehicle.04-19-2012
20120090295EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - An exhaust system for an internal combustion engine is provided. The engine comprises an exhaust line, at least one exhaust gas aftertreatment device arranged in the exhaust line, and a heat source and a heat sink arranged in separate branches of the exhaust line upstream of the exhaust gas aftertreatment device, an exhaust gas flow rate through each respective separate exhaust branch controlled by at least one flow control device. In this way, the temperature of the exhaust entering the aftertreatment device may be controlled by an amount of exhaust that flows through each branch of the exhaust line.04-19-2012
20120324866METHOD FOR OPERATING A DELIVERY DEVICE FOR A REDUCING AGENT AND DELIVERY DEVICE FOR A REDUCING AGENT - A method for operating a delivery device for delivering a reducing agent from a reducing agent tank into an exhaust treatment device of an internal combustion engine of a motor vehicle, includes at least intermittently carrying out a ventilation process of the delivery device during operation of the internal combustion engine. A registration of a ventilation process first occurs. A timing unit having a preset time interval and/or a mass-flow summing unit having a preset total mass flow is then actuated. When the preset time interval and/or the preset total mass flow is reached, the ventilation process is then carried out. In particular, monitoring the delivery device by a pressure sensor can thus be omitted. A delivery device for delivering a reducing agent is also provided.12-27-2012
20120324865METHOD FOR REGULATING A PUMP OF AN SCR SYSTEM - A method for regulating a motor-driven pump of an SCR system, the pump delivering a pressure, being subjected to a hydraulic torque in relation to this pressure and also to a resistive torque and being driven by an electric motor including coils supplied with a current and developing a torque in relation to this current, according to which to regulate the pump, use is made of a mechanism to measure the current in the coils of the motor, of a regulator of overall current consumed by the motor, and of a model of the relation between the current and the pressure using an estimate of part of the resistive torque, namely the dry frictions, obtained by rotating the pump under no-load conditions at different speeds and by measuring the associated current.12-27-2012
20120324864SYSTEM AND METHODS FOR CONTROLLING AIR FUEL RATIO - Methods and system for controlling air-fuel ratios in an internal combustion engine are disclosed. One embodiment comprises, adjusting a sensor calibration correction value of an exhaust sensor upstream of a catalyst based on an exhaust sensor downstream of the catalyst. The adjustment of the sensor calibration correction value takes advantage of the fact that certain aromatic hydrocarbons causing errors in the reading of the upstream sensor are not present at the downstream sensor due to sufficient catalytic activity of a catalyst positioned between the sensors.12-27-2012
20120324868METHOD FOR CONVERTING CONSTITUENT GASES IN AN INTERNAL COMBUSTION ENGINE EXHAUST GAS MIXTURE AND A VEHICLE INCORPORATING THE SAME - A vehicle includes an internal combustion engine operatively disposed therein. The engine generates exhaust gases. The vehicle further includes an alternator operatively connected to the engine. The alternator produces DC power. An ultracapacitor is operatively connected to the alternator to receive electrical energy therefrom. The vehicle still further includes an exhaust gas treatment system operatively connected to the engine to receive exhaust gases therefrom. The exhaust gas treatment system includes an electrically heated catalyst (EHC) device electrically connected to the ultracapacitor to selectively heat a catalytic exhaust system component. The ultracapacitor stores energy converted by the alternator from vehicle kinetic energy and releases the stored energy to heat the EHC.12-27-2012
20120285143METHOD FOR MANAGING AMMONIA SLIP - An internal combustion engine is configured to operate in a compression-ignition combustion mode and includes an exhaust aftertreatment system having an ammonia-selective catalytic reduction device. A method for operating the engine includes determining a present engine NOx generation rate, determining a NOx reduction rate of the ammonia-selective catalytic reduction device, determining an ammonia slip rate from the ammonia-selective catalytic reduction device corresponding to the NOx reduction rate of the ammonia-selective catalytic reduction device and the present engine NOx generation rate, and controlling engine operation to adjust the present engine NOx generation rate in response to the ammonia slip rate from the ammonia-selective catalytic reduction device.11-15-2012
20120285139EMISSIONS CONTROL DIAGNOSTIC METHOD AND SYSTEM - Various methods for and embodiments of an aftertreatment system which includes a catalyst disposed upstream of a particulate filter are provided. In one example, the method includes, conducting soot regeneration of the particulate filter under a selected operating condition, and determining whether a soot regeneration frequency of the particulate filter is greater than a threshold frequency. The method further includes initiating a sulfur regeneration of the aftertreatment system based on the soot regeneration frequency of the particulate filter being greater than the threshold frequency, determining whether the soot regeneration frequency of the particulate filter is less than the threshold frequency after the sulfur regeneration, and conducting non-regeneration operation of the aftertreatment system based on the soot regeneration frequency of the particulate filter being less than the threshold frequency after the sulfur regeneration of the aftertreatment system.11-15-2012
20120285140METHOD FOR MONITORING HYDROCARBON SLIP FROM AN OXIDATION CATALYST - A method for operating a compression-ignition internal combustion engine including an exhaust aftertreatment system having an oxidation catalyst fluidly coupled upstream of a catalyzed particulate filter includes introducing fuel into an exhaust gas feedstream of the engine upstream of the oxidation catalyst, determining operating parameters associated with the exhaust gas feedstream, determining a hydrocarbon slip rate through the oxidation catalyst corresponding to the operating parameters associated with the exhaust gas feedstream and the introduced fuel into the exhaust gas feedstream, and controlling a flowrate of fuel introduced into the exhaust gas feedstream upstream of the oxidation catalyst in response to the estimated hydrocarbon slip rate through the oxidation catalyst.11-15-2012
20120285144EXHAUST AFTER TREATMENT SYSTEM AND METHOD FOR TREATING EXHAUST - In one exemplary embodiment of the invention an exhaust after treatment system is provided that includes an inlet housing, an inlet in the inlet housing configured to receive an exhaust gas flow from an internal combustion engine and an outlet in the inlet housing configured to direct the exhaust gas flow to a pollutant reduction device. The system also includes a deflector coupled to an inner surface of the inlet housing, the deflector configured to receive the exhaust gas flow from the inlet and uniformly direct the exhaust flow through the outlet and to the pollutant reduction device.11-15-2012
20120285142SYSTEM AND METHOD FOR CONTROLLING FUEL DELIVERY BASED ON OUTPUT FROM A POST-CATALYST OXYGEN SENSOR DURING CATALYST LIGHT-OFF - A system includes a voltage determination module and a fuel control module. The voltage determination module determines a first output voltage of a first oxygen sensor position upstream from a catalyst in an exhaust system of an engine, and determines a second output voltage from a second oxygen sensor positioned downstream from the catalyst, the first output voltage indicating a first oxygen level of exhaust upstream from the catalyst, the second output voltage indicating a second oxygen level of exhaust downstream from the catalyst. The fuel control module controls a fuel mass injected into the engine based on the first output voltage and the second output voltage when a temperature of the catalyst is greater than a light-off temperature, and controls the fuel mass based on the second output voltage and independent from the first output voltage when the catalyst temperature is less than light-off temperature.11-15-2012
20120285141PARTICULATE FILTER REGENERATION METHOD - A regeneration system for a filter that filters exhaust gas of an engine includes a soot loading determination module that determines soot accumulation in the filter. A regeneration control module receives the determined soot accumulation from the soot loading determination module, compares the soot accumulation to a first soot accumulation threshold, and selectively increases oxidation levels in the exhaust gas in response to the comparison between the soot accumulation and the first soot accumulation threshold to initiate regeneration in the filter.11-15-2012
20120285145METHOD AND DEVICE FOR ESTIMATING NOX EMISSIONS IN COMBUSTION ENGINES - The present invention provides for a system for controlling NOx emissions based on the calculation of an error given by the difference between a first measured value obtained from a NOx sensor (11-15-2012
20100199635EXHAUST GAS PURIFYING SYSTEM - An exhaust gas purifying system includes: a NOx trapping agent (08-12-2010
20100199634EXHAUST TREATMENT SYSTEM IMPLEMENTING SELECTIVE DOC BYPASS - An exhaust treatment system for use with a power system is disclosed. The exhaust treatment system may have an SCR device (08-12-2010
20120137658Temp-A-Start Regeneration System - A regeneration module is usable in conjunction with a diesel engine to control the operation of a regeneration cycle of the diesel engine. During the regeneration cycle, particulate matter collected in or on a diesel particulate filter of the diesel engine is removed to improve the operation of the diesel particulate filter. In various embodiments, the regeneration module only functions when manually activated by a user of the diesel engine such that the regeneration cycle is only initiated during desirable idle periods of the diesel engine.06-07-2012
20130008148EXHAUST PURIFYING SYSTEM FOR HYBRID VEHICLE AND CONTROL METHOD THEREFOR - An exhaust purifying system for a hybrid vehicle includes: a catalytic device (01-10-2013
20130008150COMBUSTION/TEMPERATURE INCREASE CONTROL METHOD AND DEVICE FOR AFTER-TREATMENT BURNER SYSTEM - Disclosed is a combustion/temperature increase control method for an after-treatment burner system with a burner 01-10-2013
20130008149ESTIMATION OF EFFICIENCY FOR AGED CATALYSTS - Systems and methods for estimating an efficiency of a catalyst placed in an exhaust path of a combustion engine are disclosed. In one example approach, a method comprises: ageing the catalyst consecutively at different temperatures for definite time periods; measuring the catalyst conversion efficiency after each ageing step; calculating the ageing factor for each step of the ageing procedure and the accumulative value of the ageing factors for all steps of the ageing procedure; estimating catalyst efficiency correlation factors related to the measured catalyst conversion efficiency for each temperature point and for all ageing conditions; determining a correlation between the catalyst efficiency correlation factors and the accumulative value of the ageing factors; and calculating the conversion efficiency of the aged catalyst based on a predetermined correlation between the accumulative ageing factor and the catalyst efficiency correlation factor.01-10-2013
20130014493SYSTEM FOR PURIFYING EXHAUST GAS AND METHOD FOR CONTROLLING THE SAMEAANM Park; Jae BeomAACI SeoulAACO KRAAGP Park; Jae Beom Seoul KR - A system for purifying an exhaust gas may include a lean NOx trap (LNT) catalyst adapted to absorb nitrogen oxides contained in the exhaust gas at a lean atmosphere, release the absorbed nitrogen oxides at a rich atmosphere, and reduce or slip the released nitrogen oxides according to a temperature thereof; a particulate filter adapted to trap particulate matters contained in the exhaust gas and regenerate the trapped particulate matters by using the nitrogen oxides slipped from the LNT catalyst; and a controller adapted to selectively create the rich atmosphere when the temperature of the LNT catalyst is higher than or equal to a first predetermined temperature or a temperature of the particulate filter is higher than or equal to a second predetermined temperature. A method for controlling the system is also disclosed.01-17-2013
20130014492EMISSION CONTROL SYSTEM FOR A VEHICLEAANM BASISTA; JEFFREY S.AACI MILFORDAAST MIAACO USAAGP BASISTA; JEFFREY S. MILFORD MI USAANM YACCARINO; PHILIP A.AACI TROYAAST MIAACO USAAGP YACCARINO; PHILIP A. TROY MI US - In accordance with an exemplary embodiment, an emission control system and method is provided for a vehicle. The system comprises a reductant reservoir having an intake pipe for receiving reductant and a heater for heating the reductant. A pump provides the heated reductant to an injector and also to a conduit extending into the intake pipe to provide heated reductant into the intake pipe to melt any frozen reductant in the intake pipe. The method comprises heating reductant stored within a reservoir of a vehicle emission control system, and pumping the heated inductant into an intake pipe of the reservoir to melt any frozen reductant in the intake pipe.01-17-2013
20110138776DIESEL ENGINE EXHAUST TREATMENT SYSTEM - A diesel engine exhaust treatment system is provided which includes a diesel oxidation catalyst and a diesel particulate filter, where a first SCR catalyst is positioned at the inlet of the diesel particulate filter, and a second SCR catalyst is coated on the filter. The first and second SCR catalysts each have a low loading, such that a lower backpressure is achieved over the use of a single SCR-coated diesel particulate filter at higher catalyst loadings. The exhaust treatment system also provides effective catalyst efficiency for removal of NO06-16-2011
20110146241METHOD FOR OPERATING A UREA-WATER SOLUTION METERING SYSTEM AND MOTOR VEHICLE USING THE SYSTEM - A method for operating a device for providing a liquid reactant to an exhaust gas system. The device includes at least one tank and an injection nozzle connected to one another by a line. The line has a pump for feeding the reactant. A controllable return line connected between the pump and the injection nozzle leads from the line to the tank. A controller controls operation of the injection nozzle, the pump and the return line, so that the reactant is only circulated intermittently through the controllable return line. A motor vehicle using the method is also provided.06-23-2011
20110146240APPARATUS, SYSTEM, AND METHOD FOR MITIGATING DIESEL EXHAUST FLUID DEPOSITS AND ASSOCIATED CONDITIONS - According to one embodiment, described herein is an apparatus for mitigating on-board diagnostic (OBD) faults generated by an OBD system of an internal combustion engine (ICE) system having a selective catalytic reduction system with a diesel exhaust fluid (DEF) decomposition tube. The apparatus includes a fault mitigation module that is configured to monitor at least one OBD signal of the OBD system and issue a request for regenerating the DEF decomposition tube when a value of the at least one OBD signal reaches a predetermined regeneration threshold corresponding with the at least one OBD signal. The regeneration threshold is reachable prior to an OBD fault threshold corresponding with the at least one OBD signal. The apparatus also includes a regeneration module that is configured to regenerate the DEF decomposition tube according to the issued request.06-23-2011
20110146239METHOD FOR MONITORING A POLLUTANT CONVERSION CAPACITY IN AN EXHAUST GAS AFTERTREATMENT SYSTEM - The present invention relates to a method for monitoring a pollutant conversion capacity of a catalytically coated, oxidizing exhaust gas aftertreatment component (06-23-2011
20110146237EXHAUST GAS PURIFICATION SYSTEM FOR THE TREATMENT OF ENGINE EXHAUST GASES BY MEANS OF SCR CATALYST - An exhaust gas purification system (method and device) for the treatment of diesel exhaust gases containing nitrogen oxides and hydrocarbons is disclosed, which comprises the addition of ammonia or of a compound decomposable to ammonia into the exhaust gas stream and the subsequent leading of the exhaust gas stream over two successively arranged SCR catalysts with different properties and compositions. Both SCR catalysts are free of vanadium compounds and only the downstream SCR catalyst contains zeolite compounds. The exhaust gas purification system according to the invention is characterized by good “kick-off” behavior at low temperatures and a simultaneously high conversion performance over a wide temperature range.06-23-2011
20110146236Exhaust Aftertreatment System - An exhaust aftertreatment system including an exhaust flow area, a first bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area and a second bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area. The first bank may be arranged in parallel with the second bank and inlet of the first bank is configured to provide greater flow resistance to the exhaust than the inlet of the second bank06-23-2011
20110146235ABNORMALITY DETECTION SYSTEM AND ABNORMALITY DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - When the NOx SCR catalyst (06-23-2011
20110146234POWER SYSTEM HAVING ADDITIVE INJECTOR - A power system is provided. The power system includes a power source configured to generate a flow of exhaust including particulate matter. The power system also includes a fuel supply line connecting a fuel supply and the power source, and being configured to direct a fuel flow from the fuel supply to the power source. An additive injector is configured to inject an additive into the fuel flow. An ionization device is at least partially disposed within the flow of exhaust, and is configured to apply a charge to the particulate matter and the additive. A particulate filter is configured to remove the particulate matter and the additive from the flow of exhaust.06-23-2011
20110146233REGENERATION ASSIST CALIBRATION - A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and a controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold.06-23-2011
20130019588Method Of Controlling A Direct-Injection Gaseous-Fuelled Internal Combustion Engine System With A Selective Catalytic Reduction Converter - A method controls a direct-injection gaseous-fuelled internal combustion engine system to improve the conversion efficiency of an SCR converter that is operative to reduce levels of NOx. The method comprises detecting when the internal combustion engine is idling and timing the injection of a first quantity of fuel to begin injection when the engine's piston is near top dead center; and controlling the temperature of exhaust gas to be above a predetermined temperature that is defined by an operating temperature range that achieves a desired conversion efficiency for the selective catalytic reduction converter, by: (a) timing injection of the gaseous fuel to begin after timing for injection the first quantity of fuel, and (b) increasing exhaust gas temperature by increasing a delay in timing for injecting the gaseous fuel, while limiting the delay to keep concentration of unburned fuel exiting the combustion chamber below a predetermined concentration.01-24-2013
20130167508CONTROL DEVICE OF DIESEL ENGINE - A control device of a diesel engine is provided. The device includes an engine body having a cylinder, a fuel injection valve for injecting fuel into the cylinder, a valve timing control module for changing opening and closing timings of at least an intake valve or an exhaust valve, an oxidation catalyst arranged within an exhaust passage for purifying HC discharged from the cylinder, and a DPF arranged downstream of the oxidation catalyst for capturing soot within exhaust gas. The device also includes a DPF regenerating module for supplying, when a predetermined DPF regeneration condition is satisfied, HC to the oxidation catalyst to regenerate the DPF by heat generated from an oxidation reaction of HC, and a fuel cutting module for stopping, when the diesel engine is in a deceleration state, a main injection of the fuel that is performed on a compression stroke of the cylinder.07-04-2013
20120240556METHOD TO REDUCE ENGINE EMISSIONS FOR AN ENGINE CAPABLE OF MULTI-STROKE OPERATION AND HAVING A CATALYST - A method to control valves in a cylinder operating in a multi-stroke cylinder mode. Valves are controlled to improve engine emissions as operating conditions vary.09-27-2012
20120240555METHOD OF INCREASING VOLUMETRIC THROUGHPUT OF AN INTERNAL COMBUSTION ENGINES USED IN VAPOR DESTRUCTION APPLICATIONS - A method and device for controlling emissions of VOC's comprises transporting VOC's to an engine and transporting the exhaust from the engine into a manifold. Supplemental air is transporting into the manifold and heat is transferred from the exhaust to the supplemental air within the manifold. The supplemental air is mixed with the exhaust and the mixture is transferred to a pollution abatement device.09-27-2012
20120240554MANGANESE-BASED OXIDES PROMOTED LEAN NOx TRAP (LNT) CATALYST09-27-2012
20080236142Method and apparatus for exhaust gas purifying using hydrocarbon-selective catalytic reduction - There is provided a method and apparatus for exhaust gas purifying, especially NO10-02-2008
20080229728Method and system for the simultaneous measurement of a plurality of properties associated with an exhaust gas mixture - A method for simultaneously measuring one or more properties (e.g. temperature, concentration of NO09-25-2008
20110232266GASOLINE ENGINE WITH AN EXHAUST SYSTEM FOR COMBUSTING PARTICULATE MATTER - A gasoline engine having an exhaust system comprises means for trapping particulate matter (PM) from the exhaust gas and a catalyst for catalysing the oxidation of the PM by carbon dioxide and/or water in the exhaust gas, which catalyst comprising a supported alkali metal. The invention further includes a method of combusting PM from a gasoline engine in CO09-29-2011
20110232267METHOD AND DEVICE FOR THE ADDITION IN DROPLET FORM OF A LIQUID REDUCING AGENT INTO AN EXHAUST GAS LINE - A method and a device for the addition in droplet form of a liquid reducing agent to an exhaust gas line of an internal combustion engine, particularly to a rear end side of an exhaust gas treatment component, includes at least identifying at least one exhaust gas parameter during operation of the internal combustion engine, determining a size of a droplet of the reducing agent to be added as a function of an exhaust gas parameter, adjusting a first delivery pressure of the reducing agent toward the exhaust line as a function of the determined size of the droplet, and adding the reducing agent to the exhaust line with an adding unit. In this way, it can be achieved, in particular, that the end side of the exhaust gas treatment component is evenly wetted during operation of the internal combustion engine by using the droplets of the reducing agent.09-29-2011
20110232265Approach for Detecting Reductant Availability and Make-Up - An engine system having a reductant delivery and storage system is described. In one example, a physical condition associated with a reductant storage device is correlated with a characteristic of a fluid stored in the reductant storage device to determine the availability and make-up of the stored fluid. In response, engine operation may be adjusted.09-29-2011
20110232264FILTER ARRANGEMENT FOR EXHAUST AFTERTREATMENT SYSTEM - An auxiliary filter arrangement for an exhaust aftertreatment system, such as a diesel particulate filter (DPF) system. The DPF communicates with an exhaust line to receive a flow of exhaust gases therethrough. An auxiliary filter is positioned in an auxiliary line or tube that connects an air supply, a pressure sensor, and/or any other aftertreatment system component to the exhaust line. The auxiliary filter can be a wire mesh filter operable to trap particulate or soot, thereby preventing the soot from traveling further up the auxiliary line toward the components of the air supply system, the pressure sensor, and/or the components of any other aftertreatment system communicating with the exhaust line through the auxiliary line.09-29-2011
20110232263EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine having a lean NOx catalyst in an exhaust system is provided. The lean NOx catalyst traps NOx in exhaust gases when the exhaust gases are in an oxidizing state, and discharges the trapped NOx when the exhaust gases are in an reducing state. In this apparatus, an estimated trapped NOx amount which is an estimated value of an amount of NOx trapped in the lean NOx catalyst, is calculated using a neural network. Engine operating parameters indicative of an operating condition of the engine are input, and the neural network outputs at least one control parameter which is relevant to the lean NOx catalyst. A reducing process of the NOx trapped in the lean NOx catalyst is performed according to the estimated trapped NOx amount.09-29-2011
20110252770Regeneration Method For Ceramic Honeycomb Structures - A method for regenerating a diesel particulate filter includes elevating a temperature of a gas stream flowing into an inlet of the diesel particulate filter to greater than or equal to 450° of the inlet of the diesel particulate filter, wherein the gas stream at the inlet of the diesel particulate filter contains an amount of NOx of equal to or greater than 300 ppm, and an amount of O10-20-2011
20080223018SUPPLYING TUNGSTEN TO A COMBUSTION SYSTEM OR COMBUSTION SYSTEM EXHAUST STREAM CONTAINING IRON - The present invention relates to an apparatus and method for delivering tungsten from a to a fuel combustion system or to the exhaust therefrom. By the present invention, tungsten from the lubricant or the fuel will interact with iron from the combustion process. In this manner, the tungsten scavenges or inactivates iron that can otherwise poison catalytic converters, sensors and/or automotive on-board diagnostic devices and/or reduce the operation of spark plugs. The present invention can also lead to improved durability of exhaust after treatment systems. Supplying tungsten acts to change the characteristics of iron deposits formed by combusting a fuel with iron.09-18-2008
20130167509CONTROL DEVICE OF DIESEL ENGINE WITH TURBOCHARGER - A control device of a diesel engine with a turbocharger is provided. The device includes an engine body having a cylinder, a fuel injection valve, a turbine of the turbocharger, a bypass passage for bypassing the turbine, a bypass valve for opening and closing the bypass passage, an oxidation catalyst for purifying HC, and a DPF for capturing soot. The device includes a fuel cutting module for stopping, when the diesel engine is in a deceleration state, a main injection of the fuel performed on compression stroke, a DPF regenerating module for performing, when a predetermined DPF regeneration condition is satisfied, a post injection on expansion stroke to supply HC to the oxidation catalyst and regenerate the DPF by heat generated from an oxidation reaction of HC, and a bypass valve control module for controlling the bypass valve.07-04-2013
20130167510INTERNAL COMBUSTION ENGINE WITH EXHAUST-GAS AFTERTREATMENT ARRANGEMENT AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE - A method, comprising purging a storage catalytic convertor of stored NOx by diverting only a portion of incoming exhaust flow around the catalytic device while increasing injection of reductant to the storage catalytic convertor; and responsive to the diverting, adjusting injection of an ammonia-containing fluid into recombined exhaust flow upstream of an SCR catalytic convertor. Bypass of the storage catalytic convertor reduces available oxygen and air flow through the storage catalytic convertor, providing a more advantageous environment for reduction of NO07-04-2013
20130167507SYSTEM AND METHOD FOR REGENERATING THE PARTICULATE FILTER IN A DIESEL ENGINE - In a diesel engine equipped with a system for automatic regeneration of a particulate filter, an automatic regeneration mode is inhibited in the case where there is recorded a number higher than a pre-set threshold of unfavorable event. When the automatic regeneration mode is inhibited, an on-demand regeneration mode is simultaneously enabled, which can be activated manually by the driver. If an on-demand regeneration is not performed before the vehicle has covered a certain mileage since the automatic regeneration mode was inhibited, the vehicle is set in a condition of limited performance.07-04-2013
20130139488System And Method For Determining A Maximum Dose Rate Reductant - An exhaust gas treatment system for an internal combustion engine is provided, having an exhaust gas conduit, a reductant source, a temperature sensor, an intake mass air flow sensor, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The exhaust gas contains oxides of nitrogen (“NO06-06-2013
20130174536METHOD FOR PROTECTING A DPF OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for protecting a DPF in the exhaust section of an internal combustion engine of a motor vehicle from unintentional combustion of soot in the DPF. According to the invention, the motor vehicle is a hybrid vehicle having at least one electric machine and is able to be driven exclusively by one or more electric machine(s) for some time. The vehicle is operated in a DPF protection mode if the system detects that unintentional combustion of soot is taking place or threatening to take place in the DPF, initiating an automatic decoupling of the combustion engine from the wheel drive train, forward propulsion demands by the driver are met exclusively with the aid of the one or more electric machine(s), and the combustion engine is switched off completely or is operated with stable stoichiometric combustion.07-11-2013
20110258982METHOD FOR THE ON-BOARD REACTIVATION OF THERMALLY AGED NITROGEN OXIDE STORAGE CATALYSTS IN MOTOR VEHICLES HAVING AN INTERNAL COMBUSTION ENGINE OPERATED PREDOMINANTLY UNDER LEAN CONDITIONS - Nitrogen oxide storage catalysts are used to remove the nitrogen oxides present in the lean exhaust gas of lean-burn engines. Storage catalysts are thermally aged by high temperatures. Ageing is due to sintering of the catalytically active noble metal components of the catalyst and to formation of compounds of the storage components with the support materials. According to the invention, the formation of compounds of the storage materials can be largely reversed by treatment of the storage material with a gas mixture containing carbon dioxide, optionally water vapor and optionally nitrogen oxides at temperatures in the range from 200° C. to 950° C., preferably from 300° C. to 700° C. The reactivation can be carried out under emission-neutral conditions directly in the vehicle during driving operation by setting of suitable exhaust gas conditions and regulating the air/fuel ratio.10-27-2011
20120247087Increased Fan Speed To Assist DPF Regeneration - A method and device for raising the temperature of exhaust gas from an engine by increasing parasitic loading on the engine without significantly increasing engine speed. This may be accomplished by increasing a demand on a hydraulic fan powered by a variable displacement hydraulic pump and meeting the demand by adjusting the displacement for the variable displacement hydraulic pump.10-04-2012
20080216463Device for Removing Nitrogen Oxides From Internal Combustion Engine Waste Gas and Method for Dosing an Aggregate of Internal Combustion Engine Waste Gas - In a device and a method for removing nitrogen oxides from the exhaust of an internal combustion engine which is operated predominantly with an excess of air, the internal combustion engine is assigned an exhaust system having a nitrogen oxide reduction catalytic converter which comprises two catalytic converter parts, whose reducing agent filling levels can be determined. Metering of a reducing-agent-containing additive into the exhaust gas of the internal combustion engine takes place as a function of the reducing agent filling level of the first catalytic converter part and/or of the second catalytic converter part.09-11-2008
20110302909Selective Catalytic Reduction Via Electrolysis of Urea - A method for producing ammonia suitable for use as a reductant in a combustion exhaust gas treatment system is provided that includes the electrolytic hydrolysis of urea under mild conditions. The ammonia generator, which includes an electrolysis apparatus including an electrolytic flow cell, an alkaline electrolyte composition, and a recirculation system, may be operatively coupled to an exhaust gas treatment system to provide an apparatus for reducing nitrogen oxides (NO12-15-2011
20130133309METHODS FOR AN EXHAUST FLUID SENSOR - Various methods are provided for diagnosing an exhaust fluid sensor disposed in an exhaust fluid passage. By monitoring the sensor during conditions when it is in contact with the exhaust fluid and when it is not in contact with the exhaust fluid, an expected change in the sensor output can be monitored to identify whether the sensor is generating sufficiently accurate readings.05-30-2013
20130133310METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS - A method pertaining to an SCR system which includes a dosing unit (05-30-2013
20130133308Apparatus And Methods For Determination Of Total And Solid Carbon Content Of Engine Exhaust - The present disclosure provides apparatus and methods to determine real-time total carbon content, non-inclusive of carbon dioxide, and/or solid carbon content of engine exhaust. For a total carbon content determination, substantially all carbon dioxide is removed from the exhaust, and thereafter substantially all the remaining carbon of the exhaust is oxidized to provide a quantity of carbon dioxide which then may be used to determine total carbon content of the exhaust. For solid carbon content determination, in addition to substantially all carbon dioxide being removed from the exhaust, substantially all carbon-containing non-solid substances are also removed from the exhaust, and thereafter substantially all the remaining carbon of the exhaust is oxidized to provide a quantity of carbon dioxide which then may be used to determine solid carbon content of the exhaust.05-30-2013
20130133307POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a controller that generates a first control signal to set a switching device to a first operational state if the first temperature level downstream of the catalyst is less than a threshold temperature level and the engine is being decelerated. The controller further generates a second control signal to induce a generator to output a second voltage if the first temperature level is less than the threshold temperature level and the engine is being decelerated, such that the second voltage is applied through the switching device in the first operational state to the catalyst to increase a temperature of the catalyst.05-30-2013
20130091826COLD START NO2 GENERATION SYSTEM - A cold start NO04-18-2013
20130111881METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF HC DOSING SYSTEMS FOR EXHAUST CLEANING - A method for cooling a dosing unit (05-09-2013
20130091827MONITOR OF AMMONIA IN DOSING SYSTEM - An ammonia dosing system has a canister whose interior contains ammonia luminophores and a delivery apparatus for delivering ammonia from the canister interior into an exhaust after-treatment system to entrain with engine exhaust flowing toward an SCR catalyst for catalytic conversion of NO04-18-2013
20130091828System and Method for Regenerating Gasoline Particulate Filter - A system for regenerating a particulate filter mounted on an exhaust pipe of a gasoline engine including a plurality of cylinders and an ignition device for igniting fuel and air in the cylinder, a three-way catalyst device mounted on the exhaust pipe connected to the gasoline engine, and to oxidize or reduce exhaust gas, the particulate filter mounted on the exhaust pipe downstream of the three-way catalyst device to trap particulate matter and regenerate the particulate matter using heat of the exhaust gas, a differential pressure sensor mounted upstream and downstream of the particulate filter and to measure a pressure difference of the particulate filter, and a control portion to receive the measured pressure difference and control parameters to determine an amount of non-ignited fuel which is not ignited and flows to the three-way catalyst device among the fuel flowing into the plurality of cylinders.04-18-2013
20130091829METHOD AND DEVICE PERTAINING TO LIMITING THE TEMPERATURE OF A DOSING UNIT IN A SCR SYSTEM - A method pertaining to an SCR system for cleaning of exhaust gases from an engine (04-18-2013
20130111877SYSTEM AND METHOD FOR PARTICULATE FILTER REGENERATION - In one exemplary embodiment of the invention, a method of regenerating a particulate filter includes flowing an exhaust gas from an internal combustion engine into a particulate filter and determining a particulate level in the particulate filter. The method also includes performing a primary regeneration when the particulate level is below a first value, the primary regeneration including flowing exhaust gas with a selected amount of hydrocarbons in the exhaust gas into the particulate filter, and performing a secondary regeneration when the particulate level is above the first value, the secondary regeneration including flowing exhaust gas with an increased amount of nitrogen oxide into the particulate filter.05-09-2013
20130111876LOW COST LEAN NOx REDUCTION CATALYST SYSTEM - An exhaust aftertreatment system that includes a suitable combination of particulate catalyst materials is used to effectively reduce an amount of NO05-09-2013
20130111885METHOD PERTAINING TO HC DOSING SYSTEMS AND DEVICE OF HC DOSING SYSTEMS - A method pertaining to an HC dosing system for cleaning exhaust gases from an engine (05-09-2013
20130111884METHOD PERTAINING TO AIR REMOVAL FROM A HC DOSING SYSTEM AND A HC DOSING SYSTEM - A method pertaining to an HC dosing system wherein fuel from a container (05-09-2013
20130111882METHOD PERTAINING TO AIR REMOVAL FROM A DOSING SYSTEM AT AN SCR SYSTEM AND A SCR SYSTEM - A method pertaining to an SCR system in which reducing agent in liquid form is supplied to a feed device (05-09-2013
20130111883METHOD AND DEVICE PERTAINING TO DOSING UNIT OF SCR SYSTEM - A method pertaining to an SCR system for cleaning of exhaust gases from an engine including a dosing unit (05-09-2013
20130111878ENGINE AND AFTERTREATMENT OPTIMIZATION SYSTEM - An approach and system for engine and aftertreatment system optimization. Emissions of an engine may be reduced by an aftertreatment mechanism. Control of the engine and the aftertreatment mechanism may be coordinated for the best overall efficiency relative to both fuel consumption and the emissions reduction. Engine and aftertreatment control may also be optimized in terms of cost function minimization. Individual efficiencies of the engine and aftertreatment mechanism are not necessarily significant by themselves. Therefore, the engine and aftertreatment mechanism should be controlled in a manner to achieve the optimality of the engine and the aftertreatment mechanism together as one entity.05-09-2013
20130111880METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF HC DOSING SYSTEMS FOR EXHAUST CLEANING - A method for cooling a dosing unit pertaining to an HC dosing system for exhaust cleaning. The unit includes a dosing unit (05-09-2013
20130118155CONTROL UNIT AND CONTROL METHOD FOR REDUCTANT SUPPLY DEVICE - A reductant supply device having a reductant injection valve with an injection tip that is fixed to an exhaust pipe on the exhaust gas upstream side of a reduction catalyst, the device directly injecting and supplying an urea aqueous solution which is pressure-fed to the reductant injection valve in a state of a liquid fluid, by controlling opening and closing of the reductant injection valve. The device includes a cooling water circulation passage; a flow rate control valve; a temperature sensor for detecting a temperature at the tip of the reductant injection valve; and a controller for controlling the flow rate control valve based on the temperature at the tip such that the temperature at the tip of the reductant injection valve is maintained at a temperature between equal to or higher than a boiling point of the urea aqueous solution and equal to or lower than 130° C.05-16-2013
20130118151BOOST EXTRACTION METHOD OF SECONDARY AIR INJECTION FOR INTERNAL COMBUSTION ENGINE EMISSION CONTROL - A secondary air injection system to aid in the warm-up of a catalyst employed as part of an emissions control system of a vehicle to obtain efficient reduction in engine emissions. A compressor utilized to compress or boost air for increased engine performance is additionally used as a secondary air injection source, eliminating the need for external air pumps. The compressor is configured to transmit boosted air to the engine of the vehicle or to the catalyst to aid in the warm-up of the catalyst. A valve having an open configuration and a closed configuration controls the passage of the boosted air to the engine or to the catalyst. The valve may be controlled by a controller based upon airflow, temperature, pressure, or time. A control map relating engine speed to airflow may be used for obtaining airflow values for controlling the configuration of the valve.05-16-2013
20130118152METHOD AND DEVICE FOR CONTROLLING EFFECTIVE HEAT TRANSFER IN A SOLID GAS STORAGE SYSTEM - A method for controlling the effective heat transfer from a storage unit (05-16-2013
20110265451ASSEMBLY AND METHOD FOR REDUCING NITROGEN OXIDES, CARBON MONOXIDE AND HYDROCARBONS IN EXHAUSTS OF INTERNAL COMBUSTION ENGINES - An assembly and method for reducing nitrogen oxides, carbon monoxide and hydrocarbons in exhausts of internal combustion engines, wherein the exhaust is acted upon in a first stage catalytic converter. A first portion of the first stage catalytic converter output is cooled and a second portion of the catalytic converter output is not cooled. The cooled and not cooled exhausts are united and directed to a second stage catalytic converter. Air is injected into a selected one of (1) the not cooled exhaust prior to the juncture thereof with the cooled exhaust, and (2) the combined cooled and not cooled exhausts after the juncture thereof.11-03-2011
20130125531RESERVOIR AND TANK EQUIPPED WITH A SELF-REGULATING HEATING ELEMENT - A reservoir for holding a quantity of fluid within a tank, the reservoir including a first resistive element for heating a first part of the tank and a second resistive element for heating a second part of the tank, the second resistive element having a positive temperature coefficient. The reservoir further includes a third resistive element for heating the second part of the tank, the second resistive element and the third resistive element forming a parallel circuit, and the first resistive element being connected in series with the parallel circuit.05-23-2013
20130125530BYPASS HC - NOX ADSORBER STRATEGY - A bypass HC-NO05-23-2013
20110047975HONEYCOMB STRUCTURE-TYPE CATALYST FOR PURIFYING EXHAUST GAS EXHAUSTED FROM AUTOMOBILE, METHOD FOR PRODUCING THE SAME AND METHOD FOR PURIFYING EXHAUST GAS USING THE SAME CATALYST - A catalyst for purifying exhaust gas, which is a relatively cheap three-way-catalyst containing noble metal components, and is capable of suppressing sintering of the noble metals even at high temperature, and purifying a carbon monoxide (CO), a hydrocarbon (HC) and a nitrogen oxide (NOx), and is superior, in particular, in purifying the nitrogen oxide, along with a method for purifying exhaust gas. This catalyst is provided by a honeycomb structure-type catalyst having a carrier made of a honeycomb-type structure, coated with a catalyst composition in two or more layers, for purifying a carbon monoxide, a hydrocarbon and a nitrogen oxide contained in exhaust gas, characterized in that; a catalyst layer (A) at the upper layer side comprises a palladium component supported with a heat resistant inorganic oxide, an oxygen storage release material and a barium component, and a catalyst layer (B) at the lower layer side comprises a rhodium component supported with a cerium-zirconium-type composite oxide having a cerium/zirconium ratio by weight of 0.05 to 0.2, as converted to an oxide, or the like.03-03-2011
20080202097Engine exhaust treatment system - An engine exhaust treatment system is provided. The system may include a catalyst-based device including a catalyst configured to reduce an amount of NO08-28-2008
20080202096Particulate regeneration and engine control system - A particulate regeneration system for an engine is disclosed. The particulate regeneration system may have a particulate filter configured to remove particulate matter from a flow of engine exhaust, and a diesel oxidation catalyst located upstream of the particulate filter to facilitate oxidation of the trapped particulate matter. The particulate regeneration system may further have a regeneration device located upstream of the diesel oxidation catalyst and configured to selectively heat the exhaust above an oxidation temperature of the trapped particulate matter, and a selective catalytic reduction device located downstream of the particulate filter to remove NOx from the engine exhaust. The particulate regeneration system may also have a controller in communication with the regeneration device and the engine. The controller may be configured to modify engine operation in response to initiation of a regeneration event.08-28-2008
20080202095Catalytic converter heating - The rate at which a catalytic converter heats up to its normal operating temperature range, (e.g., during a start up phase) is increased by applying an external load to an internal combustion engine. Applying the external load causes the engine to generate more heat, which can be used to reduce the time that it takes to bring the catalytic converter up to its working temperature. As a result, a reduction in emissions can be achieved.08-28-2008
20110209460Systems And Methods For Determining A Particulate Load In A Particulate Filter - A method for regenerating a particulate filter may comprise calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter and calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor. The method for regenerating the particulate filter may further comprise causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value.09-01-2011
20110209459System and Method for Controlling Nitrous Oxide Emissions of an Internal Combustion Engine and Regeneration of an Exhaust Treatment Device - A catalyst composition is provided that includes a catalytic metal secured to a substrate, and the substrate is mesoporous and has pores that are templated. A catalyst composition includes a catalytic metal secured to a mesoporous substrate. The mesoporous substrate is a reaction product of a reactive solution, a solvent, a modifier, and a templating agent. A method for controlling nitrous oxide emissions including the catalyst composition comprising introducing a regeneration fuel into an exhaust stream upstream relative to the catalyst composition and heating the exhaust stream upstream relative to the catalyst composition. When the regeneration fuel is introduced the air λ of an air/fuel mixture of a lean burn exhaust does not exceed 1.09-01-2011
20080196389Soot filter regeneration software, methods and systems - One embodiment is a method including maintaining a count based upon an engine operating condition, determining a soot level based upon a characteristic of a diesel particulate filter, and requesting deSoot based upon the count meeting or exceeding a threshold, or the soot level meeting or exceeding a threshold, or both. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.08-21-2008
20080196388METHOD AND APPARATUS FOR ACTIVATING A DIESEL PARTICULATE FILTER WITH ENGINE HEAT - An apparatus, including a diesel particulate filter, at least one sensor for sensing information associated with operation of an engine, an engine brake configured to brake the engine, and a controller electrically coupled to the at least one sensor and the engine brake, to determine if the engine is operating in a manner that does not generate enough engine heat to activate the diesel particulate filter, and if the engine is so operating, operate the engine brake so as to brake the engine to cause the engine to generate enough engine heat to activate the diesel particulate filter. An associated method is disclosed.08-21-2008
20080196387Method and Device for Managing the Operation of a Nitrogen Oxide Trap, and Diagnosing its Ageing Condition - The invention concerns a method which consists in arranging a oxygen probe (08-21-2008
20110219747CONTROL SYSTEM FOR DOSER COMPENSATION IN AN SCR SYSTEM - A method includes determining whether selective catalytic reduction (SCR) test conditions are present, and in response to the SCR test conditions being present, operating an SCR aftertreatment system at a number of reduced ammonia to NOx ratio (ANR) operating points. The method further includes determining a deNO09-15-2011
20110219746SYSTEM, METHOD, AND APPARATUS FOR CONTROLLING AN AFTERTREATMENT SYSTEM HAVING A PARTICULATE FILTER AND A RICH NOX CONVERSION DEVICE - A system includes an internal combustion ignition engine with an exhaust gas flow, a particulate filter in the exhaust gas flow, a NO09-15-2011
20110225949METHOD AND APPARATUS FOR REGENERATING A PARTICULATE FILTER SYSTEM - A method for regenerating a particulate filter configured to treat engine exhaust gas in a vehicle equipped with an on-board navigation and an extra-vehicle communications system includes monitoring present operation of the vehicle, projecting vehicle operating conditions based upon information from the on-board navigation and the extra-vehicle communications system, monitoring a storage capacity of the particulate filter, executing a control scheme to regenerate the particulate filter when the storage capacity of the particulate filter exceeds an upper threshold, executing the control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and in response to an operator request to regenerate the particulate filter, and executing the engine control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and the projected vehicle operating conditions indicate an opportunity to regenerate the particulate filter.09-22-2011
20130145747Particulate trap regeneration - A particulate trap is regenerated with a valving mechanism downstream of the trap for periodically creating a reverse pressure of about 15 to 60 psig throughout the entire trap, a reversing apparatus operative after the reverse pressure is created for starting a regeneration cycle by creating a substantially instantaneous reverse pressure drop across the porous walls of the trap to dislodge accumulated particulate cake and by causing the filtered exhaust gas to flow back through the porous walls to remove the dislodged particulate from the trap, and controls for starting and stopping a regeneration cycle.06-13-2013
20130145748Method and Apparatus for Reducing Nitrogen Oxides in Internal Combustion Engine - To provide a method of reducing a nitrogen oxide in an exhaust gas of an internal combustion engine, an apparatus for reducing a nitrogen oxide, and an internal combustion engine system that can effectively reduce a nitrogen oxide in the exhaust gas of the internal combustion engine in a simple manner. A method of reducing a nitrogen oxide in an exhaust gas of an internal combustion engine includes: a step of moisturizing air at a pressure equal to or lower than atmospheric pressure by bringing the air into contact with one surface of a steam permeable membrane (06-13-2013
20120255281Method for Adjusting Engine Air-Fuel Ratio - A method for adjusting an air-fuel ratio of an engine is disclosed. In one example, the engine air-fuel ratio is adjusted in response to a duty cycle and frequency of a post catalyst oxygen sensor. The method may improve catalyst efficiency.10-11-2012
20120255279SYSTEM AND METHOD FOR SOLAR-POWERED CONTROL OF EXHAUST AFTER-TREATMENT SYSTEMS - A system and method for providing energy to auto systems such as systems after-treating exhaust. Energy may be received from a solar energy source electrically connected to an after-treatment system. At least some of the energy from the solar energy source may be provided to the after-treatment system to purify exhaust from an engine. A control module may provide at least some of the energy from the solar energy source to a heater, for example, to initiate heating the after-treatment system prior to starting the engine. The heater may heat the after-treatment to temperatures within a predetermined temperature range associated with optimal efficiency for the after-treatment system.10-11-2012
20100307134DEVICE AND METHOD FOR THE REDUCTION OF EMISSIONS - An emission reduction device which may be removably affixed to an engine's exhaust system. The device comprises a cylindrical carcass with a beveled opening in a diagonal line in its proximal part. A bobbin is affixed in the distal portion of the carcass. A cylindrical-shaped fibrous blanket may be inserted in the carcass and the fibrous blanket may be wrapped in a wire mesh. A second fiber mesh formed into a cone may be removably inserted in the cylindrical-shaped fibrous blanket with the larger diameter of the cone positioned proximally.12-09-2010
20100307133EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE, AND METHOD OF CONTROLLING THE SAME - An exhaust gas control apparatus for an internal combustion engine includes a NOx adsorbent that is provided in an exhaust passage of an internal combustion engine, and that adsorbs nitrogen monoxide; an active oxygen supply device that supplies active oxygen to an area upstream of the NOx adsorbent; and a control portion that performs a first control that does not cause the active oxygen supply device to supply the active oxygen while exhaust gas flows to the NOx adsorbent at a time of cold start of the internal combustion engine, whereby the nitrogen monoxide is adsorbed by the NOx adsorbent, wherein the control portion performs a second control that causes the active oxygen supply device to supply the active oxygen after the first control is finished, whereby the nitrogen monoxide adsorbed by the NOx adsorbent is converted to a nitrate or a nitrate ion on the NOx adsorbent.12-09-2010
20100307132NOx PURIFICATION SYSTEM AND METHOD FOR CONTROL OF NOx PURIFICATION SYSTEM - When the operating state of an internal combustion engine (12-09-2010
20120272639Reductant Quality Sensor - A control system for reducing nitrogen oxides in engine exhaust includes an emissions catalyst having an inlet adapted to receive an exhaust from the engine. A reductant tank is configured to store a reductant. An injector is in fluid communication with the reductant tank and is operable to inject the reductant into the exhaust upstream of the catalyst. A sensor is in fluid communication with the reductant and outputs a reductant quality signal based on the reductant. A controller determines a reductant quality of the reductant based on the reductant quality signal and outputs a dosing rate signal based on the reductant quality. The injector alters a dosing rate of the reductant based on the dosing signal.11-01-2012
20120272638REGENERATION METHODS AND SYSTEMS FOR PARTICULATE FILTERS - A method of regenerating a particulate filter of an exhaust system is provided. The method includes determining a first regeneration mode based on a soot level; generating control signals to a first fuel injector associated with an engine based on the first regeneration mode; determining a second regeneration mode based on the soot level; and generating control signal to a second fuel injector associated with an exhaust stream of the exhaust system based on the second regeneration mode.11-01-2012
20120272640VARIABLE SUCTION EXHAUST - A throttleable exhaust venturi is described herein that generates strong suction pressures at an exhaust outlet by accelerating an incoming ambient fluid stream with the aid of a venturi to high gas velocities and injecting a combustion exhaust stream into the ambient fluid stream at an effective venturi throat. A mixing element downstream of the venturi throat ensures that the mixed fluid stream recovers from a negative static pressure up to local atmospheric pressure. A physical and the effective throat of the venturi are designed to promote mixing and stabilize the ambient fluid flow to ensure that high velocity is achieved and the effective venturi is operable over a variety of combustion exhaust stream mass flow rates.11-01-2012
20130152548AUTOMOTIVE CATALYTIC AFTERTREATMENT SYSTEM - A catalytic aftertreatment system for a diesel engine exhaust gas is described. The system comprises a diesel oxidation catalyst (DOC) and an aftertreatment device located downstream of the diesel oxidation catalyst (DOC), which aftertreatment device requires periodic heat treatment, and means to generate a temperature increase within the aftertreatment device, said diesel oxidation catalyst (DOC) comprising an upstream zone of length from 0.5 to 2 inches (12.7-50.81 mm) of higher oxidation activity for hydrocarbons (HC) than the remainder of the diesel oxidation catalyst (DOC).06-20-2013
20130152549METHOD AND SYSTEM FOR OPTIMIZING FUEL AND REDUCTANT CONSUMPTION - An operation mode of an engine and after-treatment system is determined based on a reductant-to-fuel cost ratio. The operation mode optimizes fuel consumption and reductant consumption in an engine system including an internal combustion engine and a selective catalytic reduction (SCR) catalyst while satisfying a target emissions emission level.06-20-2013
20130152550METHOD AND SYSTEM FOR DIESEL PARTICLE FILTER REGENERATION - A method for regeneration of a particle filter (06-20-2013
20130152546Particulate Matter Detection Strategy In Exhaust Filter - Detecting particulate matter in an exhaust filter includes receiving data indicative of a time delay between transmission and reception of electromagnetic energy propagated through trapped particulate matter, and outputting a signal indicative of an amount of the trapped particulate matter responsive to the data.06-20-2013
20130152547Toroidal Combustion Chamber With Side Injection - In systems in which there is insufficient pressure difference between the intake and the exhaust to drive the EGR, an EGR pump is provided. In a dual-engine system, disclosed herein, the EGR system, i.e., the EGR cooler and EGR pump, is shared to obviate the need for two of each. Shutoff valves may be provided between the EGR system and a secondary of the two engines to isolate the secondary engine when it is not operating. When the engines are OPOC engines, exhaust aftertreatment devices, such as diesel oxidation catalysts and/or diesel particulate filters, may be placed upstream of where the EGR gases tee off from the engine's exhaust to thereby maintain a high pressure ratio across an exhaust turbine located downstream in the engine's exhaust.06-20-2013
20130152545DIESEL EISSION FLUID QUALITY DETECTION SYSTEM AND METHOD - An exhaust treatment system is provided including: a selective catalyst reduction (SCR) unit; a reducing agent dispensing unit configured to introduce a reducing agent into the exhaust; a first NO06-20-2013
20130180230SYSTEM AND METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - Method for controlling regeneration within an after-treatment component of an engine comprises receiving an upstream temperature signal, receiving a downstream temperature signal, and calculating a temperature difference based on a difference between the upstream temperature signal and the downstream temperature signal. The temperature difference is compared to a predetermined temperature change limit to determine whether the temperature difference is less than or greater than the predetermined temperature change limit. If the temperature difference is less than the predetermined temperature change limit, an estimate of accumulated particulate matter in the after-treatment component is calculated using a primary soot accumulation model. If the temperature difference is greater than the predetermined temperature change limit, an estimate of accumulated particulate matter in the after-treatment component is calculated using a secondary soot accumulation model. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component.07-18-2013
20130125532METHOD PERTAINING TO AIR REMOVAL FROM A HC DOSING SYSTEM AND A HC DOSING SYSTEM - A method pertaining to an HC dosing system in which fuel in liquid form is supplied to a feed device (05-23-2013
20130125529METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - A method for controlling regeneration within an after-treatment component of a compression-ignition engine comprises calculating an initial estimate of accumulated particulate matter based on a pressure-based soot accumulation model and a pressure drop index indicative of a decrease in pressure across the component. An adjusted estimate of accumulated particulate matter in the component is calculated based on the initial estimate and a soot prediction error inherent in the soot model. The adjusted estimate is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the adjusted estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold. The pressure-based soot accumulation model may be configured to predict soot accumulation in the absence of passive regeneration, and an adjusted kinetic burn model may be used to estimate a quantity of soot disposed through passive regeneration.05-23-2013
20110283682SYSTEM AND METHOD FOR REGENERATING A PARTICULATE FILTER - Various methods and systems are provided for a vehicle with an engine. In one example, a method includes identifying an approaching tunnel. The method further includes, responsive to a particulate load of a particulate filter, the particulate filter disposed in an exhaust treatment system of an engine of the vehicle, initiating regeneration of the particulate filter at a selected distance before the tunnel such that regeneration is performed before the vehicle enters the tunnel.11-24-2011
20130118154CONTROLLING OPERATION OF EXHAUST OF AN ENGINE INCLUDING A PARTICULATE FILTER - Methods and systems for controlling operation of exhaust of an engine including a particulate filter are described. One example method includes generating compressed air during engine operation, and storing the compressed air. The method further includes, during or after engine shutdown, pushing the compressed air through the particulate filter using a pressure of the compressed air.05-16-2013
20130186067METHOD FOR CONTROLLING THE REDUCTANT BUFFER LEVEL IN AN EXHAUST GAS AFTERTREATMENT DEVICE - A method for controlling a reductant buffer level in an exhaust gas after treatment device connectable downstream of an internal combustion engine includes performing a first reductant injection of a first amount upstream the exhaust gas after treatment device, performing a second reductant injection of a second amount upstream the exhaust gas after treatment device, which second amount is different to the first amount, evaluating the NOx conversion resulting from the first and second reductant injections downstream the exhaust gas after treatment device to obtain a first and second result, controlling a further reductant injection in dependence of the first and second results from the first and second NOx conversion evaluations.07-25-2013
20130186068METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF HC DOSING SYSTEMS FOR EXHAUST CLEANING - A method pertaining to an HC dosing system for exhaust cleaning for an engine which comprise a dosing unit (07-25-2013
20130186069METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS - A method pertaining to an SCR system for exhaust cleaning, includes deciding about a need, after cessation of an exhaust flow, to cool a reducing agent dosing unit (07-25-2013
20130186070DEVICES AND METHODS FOR COMPLIANT AFTERTREATMENT COMPONENT ASSEMBLY - A controller is configured to receive an input signal from a connection device of one or more aftertreatment components in an aftertreatment system for an internal combustion engine. The controller determines from the signal(s) whether the one or more aftertreatment components are properly installed for a particular aftertreatment system associated with the engine.07-25-2013
20130186071FUEL SUPPLY METHOD - The method of the present invention calculates based on the status of the exhaust emission purifier, a required supply of fuel to be supplied from the fuel supply valve to the exhaust passage, reads a unit fuel supply L07-25-2013
20130098001DIESEL ENGINE AND EXHAUST AFTERTREATMENT SYSTEM AND METHOD OF TREATING EXHAUST GASES FROM A DIESEL ENGINE - In a diesel engine and exhaust aftertreatment system, a controller is arranged to control operation of the engine to obtain a first set of exhaust characteristics and to control a fuel injector to inject fuel upstream of a DPF at a first rate of injection until at least one condition is attained, and, after the at least one condition is attained, to control the fuel injector so that a rate of fuel injection is reduced and to contra! operation of the engine to obtain a second set of exhaust characteristics so that regeneration of the DPF occurs. At least one characteristic of the first and second sets of characteristics beina, different. A method for treating, diesel engine exhaust is also disclosed.04-25-2013
20120006002DEVICE FOR DETERMINING DETERIORATION OF CATALYST AND METHOD FOR DETERMINING DETERIORATION OF CATALYST - The degree of deterioration of a catalyst is obtained accurately in cases where a plurality of catalysts is disposed at an exhaust passage of an internal combustion engine. Under the assumption that the degree of deterioration of a catalyst which is disposed at a location upstream of an NO01-12-2012
20120017569Exhaust System with Reactive Heating System - The invention relates to a system component of an exhaust system for a combustion engine, more preferably of a motor vehicle, with at least one component portion having a closed hollow space structure (01-26-2012
20120017568AMMONIA SENSOR CONTROL, WITH NOX FEEDBACK, OF AN SCR AFTERTREATMENT SYSTEM - An exemplary method includes determining an NH01-26-2012
20120017567TRANSIENT COMPENSATION CONTROL OF AN SCR AFTERTREATMENT SYSTEM - A system includes an internal combustion engine, an exhaust conduit fluidly coupled to the internal combustion engine and an SCR catalyst, and a reductant doser operationally coupled to the exhaust conduit at a position upstream of the SCR catalyst. The reductant doser is responsive to a reductant doser command. The system includes a controller having a number of modules functionally structured to execute operations to compensate for transient operation of the system. An NH01-26-2012
20130192202PARTICULATE MATTER RETAINING SYSTEM - Methods and systems are provided for passive regeneration of a particulate matter filter coupled to a gasoline engine. During vehicle deceleration conditions, an engine is operated leaner than stoichiometry over two subsequent lean phases, including an initial longer and leaner phase followed by a shorter and less lean phase. By passively regenerating the filter using intermittent lean engine operation, engine performance can be improved.08-01-2013
20130192203EXHAUST SYSTEM - An exhaust system includes an exhaust passage configured to receive exhaust from a combustion engine, a heat exchanger disposed within the exhaust passage, and a reductant supply fluidly connected to the heat exchanger, the reductant supply including methane. The exhaust system also includes a first catalyst fluidly connected to the heat exchanger and configured to receive methane from the reductant supply via the heat exchanger. The exhaust system further includes a second catalyst disposed within the exhaust passage and configured to receive the exhaust from the combustion engine via the heat exchanger. The exhaust system also includes a clean-up catalyst disposed within the exhaust passage and configured to receive a combined flow. The combined flow includes the exhaust and the methane exiting the first catalyst.08-01-2013
20130192204DEVICE FOR PROVIDING LIQUID REDUCING AGENT, METHOD FOR THAWING FROZEN REDUCING AGENT AND MOTOR VEHICLE HAVING THE DEVICE - A device for providing a liquid reducing agent includes a reducing agent tank for storing the liquid reducing agent. The reducing agent tank has at least one heater disposed in a movable manner in the reducing agent tank and constructed as an active heater. A method for thawing frozen reducing agent and a motor vehicle having the device are also provided.08-01-2013
20130192205SYSTEMS AND METHODS FOR CONTROLLING TEMPERATURE AND TOTAL HYDROCARBON SLIP - Systems and methods for controlling temperature and total hydrocarbon slip in an exhaust system are provided. Control systems can comprise an oxidation catalyst, a particulate filter, a fuel injector, and a processor for controlling a fuel injection based on an oxidation catalyst model. Example system includes a virtual sensor comprising a controller for calculating and providing the total hydrocarbon slip to subsystems for after-treatment management based on modeling the oxidation catalyst. Example methods for controlling the temperature and the total hydrocarbon slip in an exhaust system include the steps of providing an oxidation catalyst model, monitoring a condition of the exhaust system, calculating a hydrocarbon fuel injection flow rate and controlling a fuel injection. The example methods further include the steps of determining an error in the oxidation catalyst model based on the monitored condition and changing the oxidation catalyst model to reduce the error.08-01-2013
20130192206METHOD FOR DETECTING UREA DEPOSITS IN AN EXHAUST LINE OF AN AUTOMOTIVE VEHICLE, METHOD FOR ELIMINATING UREA DEPOSITS AND AUTOMOTIVE VEHICLE ADAPTED TO SUCH METHODS - A method is provided for detecting urea deposits in an exhaust line of an automotive vehicle and includes determination if an exhaust gases temperature is reached, if the result of determination is positive, stoppage of urea injection, and determination of the quantity of NOx in the exhaust gases on the outlet of the selective catalytic reduction system. A comparison is performed between the quantity of NOx determined on the outlet of the selective catalytic reduction system and a theoretical quantity or a measured quantity of NOx produced by the internal combustion engine. If the comparison shows that the quantities are different, it is considered that urea deposits are present in the exhaust line. The vehicle is arranged to stop operation of the urea injection system, to compare a quantity of NOx measured by the NOx sensor to a theoretical NOx quantity or a measured NOx quantity produced by the internal combustion engine, and to perform cleaning of the exhaust line on the basis of the result of the comparison between the quantities.08-01-2013
20130192207REDUCING AGENT SUPPLY APPARATUS, METHOD FOR CONTROLLING THE SAME, AND EXHAUST GAS PURIFICATION APPARATUS - [Problem] To provide a reducing agent supply apparatus that can quickly melt urea aqueous solution solidified in a reducing agent injection valve to allow early start of the injection control of urea aqueous solution, a method for controlling the reducing agent supply apparatus, and an exhaust gas purification apparatus.08-01-2013
20120031075METHOD FOR DETERMINING OXYGEN STORAGE CAPACITY - The oxygen storage capacity of an oxygen store associated with a catalytic converter of a combustion engine is computed by forming an integral which begins at the time of a changeover in the exposure, e.g., from rich to lean, and ends when the output signal of a post-catalytic converter lambda probe is less than a threshold value. A correction is performed to take into a consideration a time offset in the signals of the post-catalytic converter lambda probe. In particular, the time offset is measured to determine a time at which the integration should have been terminated, wherein this time is inferred retroactively.02-09-2012
20120042634METHOD FOR OPERATING AN EXHAUST GAS PURIFICATION DEVICE HAVING A HEATING APPARATUS AND MOTOR VEHICLE HAVING THE DEVICE - A method for operating a device for the purification of exhaust gas of an internal combustion engine which is operated with an excess of air includes heating at least one heating apparatus of the device above a predetermined first setpoint temperature. The at least one heating apparatus is at least partially in contact with the exhaust gas, can be activated by electrical energy and is formed at least partially with an oxidation coating. At least the temperature of the at least one heating apparatus or of the exhaust gas is subsequently monitored. An increase in the hydrocarbon fraction of the exhaust gas is initiated if at least the temperature of the heating apparatus or of the exhaust gas has reached a threshold temperature or a low-load phase of the internal combustion engine is present. A motor vehicle having the device is also provided.02-23-2012
20120042633System and Methods for Skip Fire Engine with a Lean NOx Trap - Systems and methods for skip fire spark ignition engine operation with a lean NOx trap after-treatment are provided. This system includes engine control circuitry capable of fueling and firing subsets of the engine's cylinders. Other cylinders are not provided fuel and are not fired (i.e. “skip fired”). The system includes an exhaust manifold for channeling the exhaust from at least some cylinders through a multistage catalytic converter. This may include a standard two-way or three-way catalytic converter. From the catalytic converter the exhaust may be channeled through a lean NOx trap. The lean NOx trap is able to chemically absorb the NOx emissions for regeneration according to a regeneration protocol. Lean NOx traps may include a substrate, an absorption material (also referred to as a ‘sorbent’) and a catalyst. The regeneration protocol may include monitoring NOx emissions downstream from the lean NOx trap, and comparing them against either a threshold or a lean NOx trap saturation model. Once the NOx emissions reach the threshold, or deviate from the model, a regeneration cycle may be performed.02-23-2012
20120042632METHOD AND APPARATUS FOR PROCESSING EXHAUST GAS IN INTERNAL COMBUSTION ENGINE - An exhaust gas processing apparatus (02-23-2012
20120042631CATALYST MATERIALS FOR AMMONIA OXIDATION IN LEAN-BURN ENGINE EXHAUST - An exhaust aftertreatment system and a method for treating exhaust produced by a lean-burn engine are provided. The exhaust aftertreatment system may include an exhaust gas treatment subsystem and a clean-up oxidation catalyst located downstream of the exhaust gas treatment subsystem. The clean-up oxidation catalyst can selectively oxidize NH02-23-2012
20130199157SYSTEMS AND METHODS FOR CONTROLLING REDUCTANT DELIVERY TO AN EXHAUST STREAM - Methods and systems are disclosed for determining a feed rate for direct introduction of a reductant gas into an exhaust stream to achieve a NO08-08-2013
20130199158SYSTEM, METHOD, AND APPARATUS FOR DETERMINING SOLID STORAGE MEDIA QUALITY FOR A NOX REDUCTANT - A system and method includes an exhaust aftertreatment system for an internal combustion engine having a reductant stored in a solid storage media. The reductant is released by heating the solid storage media to convert the reductant to gaseous form. The system and method determines the quality of the solid storage media by measuring operating parameters of the aftertreatment system and comparing the operating parameters to expected parameters stored in a memory of a controller of the system.08-08-2013
20130199159METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - A method for controlling regeneration within an after-treatment component of a compression-ignition engine includes receiving a value of a parameter associated with an exhaust stream passing through the after-treatment component and determining a rate of change of the parameter. A filtered parameter value is calculated based on the value of the parameter, the rate of change of the parameter, and a predetermined filtering relationship for the parameter. Accumulated particulate matter in the after-treatment component is estimated based, at least, on a soot accumulation model and the filtered parameter value. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold.08-08-2013
20130199160AFTERTREATMENT SYSTEM FOR AN ENGINE - A system includes an internal combustion engine. An aftertreatment system is coupled to the internal combustion engine to receive an exhaust gas stream. The aftertreatment system comprises one or modules. Each module includes one or more emission reducing devices to reduce undesirable constituents in the exhaust gas stream from the internal combustion engine.08-08-2013
20120085083SCR AMMONIA SLIP DETECTION - In one implementation of the disclosed technique, a NOx sensor polynomial algorithm is used to discriminate between NOx and ammonia emission. The polynomial algorithm uses the SCR's time constant property to infer the “loading state” of the SCR and estimate both the NOx conversion and quantity of ammonia slip. The polynomial algorithm assesses this by differentially analyzing the upstream and downstream NOx sensor signals through a comparison of the polynomial coefficients.04-12-2012
20120085082SYSTEM AND METHOD FOR DETECTING LOW QUALITY REDUCTANT AND CATALYST DEGRADATION IN SELECTIVE CATALYTIC REDUCTION SYSTEMS - A control system for a selective catalytic reduction (SCR) system includes a conversion efficiency determination module, an ammonia slip determination module, and a diagnostic module. The conversion efficiency determination module determines a conversion efficiency of an SCR catalyst. The ammonia slip determination module determines an amount of ammonia slip across the SCR catalyst when the conversion efficiency is less than a predetermined threshold. The diagnostic module determines pass/fail statuses of a reductant supply and the SCR catalyst based on the amount of ammonia slip and at least one ammonia slip threshold.04-12-2012
20120085081Emissions reductions through reagent release control - One embodiment is a method including determining whether an ammonia storage device has a stored quantity of ammonia, predicting an impending ammonia release from the ammonia storage device, determining a NO04-12-2012
20120085080FUEL-FIRED BURNER AND HEAT EXCHANGER SYSTEM FOR HEATING A NOx REDUCING AGENT SUPPLY TANK - A fuel-fired burner in a vehicle exhaust system is used to heat up a frozen NOx reducing agent supply tank within a predetermined target amount of time. A method and apparatus are used to identify when a supply of agent is below a predetermined temperature, and the fuel-fired burner is activated for a sufficient amount of time to raise a temperature of the agent to at least the predetermined temperature with the predetermined target amount of time.04-12-2012
20130205757RECHARGE DEVICE AND METHOD FOR NH3 CARTRIDGE - A device and method relating to the storage and delivery of ammonia for use in an after-treatment device for NO08-15-2013
20130205756LIQUID REDUCTANT SYSTEM AND METHOD FOR OPERATION OF THE LIQUID REDUCTANT SYSTEM - A liquid reductant injection system is provided. The liquid reductant injection system includes a storage tank housing a reductant solution, a return conduit extending into the storage tank, the return conduit including an outlet positioned in the storage tank, and a thermosyphon comprising an evaporator coupled to an exhaust conduit and in fluidic communication with a condenser coupled to a portion of the return conduit inside the storage tank, the condenser positioned vertically above the evaporator.08-15-2013