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Condition responsive control of heater, cooler, igniter, or fuel supply of reactor

Subclass of:

060 - Power plants

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

060282000 - By means producing a chemical reaction of a component of the exhaust gas

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Entries
DocumentTitleDate
20100115925Urea Monitoring And Replenishment Scheduling of Vehicles - Urea supply information with is integrated with vehicle location, routing and urea consumption information to generate driver guidance for obtaining urea resupply or, at a minimum, automatically generating orders to position supplies of urea at a target location.05-13-2010
20100077732BURNER FOR REGENERATION OF DIESEL ENGINE PARTICULATE FILTER AND DIESEL ENGINE PARTICULATE FILTER HAVING THE SAME - Provided are a burner for regenerating a diesel particulate filter and a diesel engine particulate filtering apparatus having the same. The burner includes: an exhaust gas flow channel; a swirler disposed between the exhaust gas flow channel and a combustion chamber for swirling the exhaust gas; a carburetor for gasifying a liquid fuel; a fuel injection nozzle for mixing the gasified fuel from the carburetor with an air for burning, and supplying the mixed gas made of the gasified fuel and the air to the combustion chamber; a combustor disposed in the combustion chamber for injecting the mixed gas supplied from the fuel injection nozzle; an igniter for igniting the mixed gas injected from the combustor by generating sparks; and a flame sensor for sensing whether the flame is made on the combustor or not.04-01-2010
20080302089Dispensing System with Remotely Mounted Metering Device - A system is disclosed for dispensing a reactant into an exhaust stream. The system dispenses a mixture of reactant and pressurized air into the exhaust stream. This system includes a mixing manifold that mounts to an exhaust pipe that carries the exhaust stream. The system also includes a metering device remotely mounted from the mixing manifold.12-11-2008
20100122527EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an exhaust gas purification apparatus for an internal combustion engine, the regeneration of a filter and the purification of NOx are made compatible with each other while suppressing an excessive supply of HC. The apparatus includes a first exhaust gas purification unit for purifying NOx, a second exhaust gas purification unit arranged in series with the first exhaust gas purification unit for collecting PM, HC supply units for supplying HC to the first exhaust gas purification unit and the second exhaust gas purification unit, respectively, and a priority decision unit for deciding priority between supplying HC to the first exhaust gas purification unit and supplying HC to the second exhaust gas purification unit, wherein an amount of HC to be supplied to a lower priority one is made smaller when a request for supplying HC to the first exhaust gas purification unit and a request for supplying HC to the second exhaust gas purification unit overlap with each other than when the HC supplying requests do not overlap with each other.05-20-2010
20110179775DIESEL AFTERTREATMENT REGENERATION SYSTEM AND METHOD - A diesel engine including at least one combustion chamber having an exhaust flow therefrom. An injection pump having a plurality of fuel outlets has a corresponding fuel outlet for each of the plurality of fuel outlets that are in controlled fluid communication with the at least one combustion chamber. At least one aftertreatment device is configured for the exhaust flow to travel therethrough. A fuel injector is positioned to inject fuel into the exhaust flow prior to the exhaust flow reaching the aftertreatment device. A valve receives fuel from at least one of the plurality of fuel outlets and the valve is configured to divert a portion of the fuel received by the valve to the fuel injector.07-28-2011
20090120070EXHAUST CLEANER FOR INTERNAL COMBUSTION ENGINE - An exhaust purifying system for an internal combustion engine is provided with a plurality of DPFs (05-14-2009
20130025265EXHAUST AFTERTREATMENT SUPPLYING A REDUCING AGENT - The present disclosure relates to on-vehicle systems and methods for mixing an NOx reductant solution from a concentrated source of NOx reductant and water. The mixed DEF is then used to treat exhaust from the vehicle to reduce pollutants.01-31-2013
20100050608After-treatment component detection system - An after-treatment component detection system may include an exhaust system configured to include an after-treatment component configured to remove one or more constituents of the exhaust gases. The detection system may include an upstream temperature sensor configured to measure temperature upstream from the after-treatment component, a downstream temperature sensor configured to measure temperature downstream from the after-treatment component, and a controller. The controller may be configured to receive signals indicative of upstream temperature measurements from the upstream sensor and signals indicative of downstream temperature measurements from the downstream sensor and determine an upstream rate of temperature change and a downstream rate of temperature change. The controller may also be configured to compare the upstream rate of temperature change to the downstream rate of temperature change and generate a fault if the upstream rate of temperature change and the downstream rate of temperature change differ by less than a predetermined amount.03-04-2010
20100050610EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - A catalyst suitable for reducing NOx in exhaust gas by ammonia in the presence of excess oxygen is arranged in an engine exhaust passage. The catalyst is fed an aqueous urea solution from an addition control valve, part of the urea fed to the catalyst is stored in the catalyst, and the ammonia produced from the urea stored in the catalyst is used to reduce the NOx in the exhaust gas. It is judged whether the storage capacity of the catalyst is larger than a preset allowable upper limit capacity. When it is judged that the storage capacity of the catalyst is larger than the allowable upper limit capacity, the feed of the aqueous urea solution is prohibited.03-04-2010
20090193792METHOD AND APPARATUS FOR MANAGING AN EXHAUST GAS FEEDSTREAM FOR A SPARK-IGNITION DIRECT-INJECTION ENGINE - The disclosure sets forth operating a spark-ignition, direct-fuel injection internal combustion engine equipped with an exhaust aftertreatment system including a lean-NOx reduction catalyst upstream of a second converter element. The engine preferentially operates in one of a homogeneous charge combustion mode and a stratified charge combustion mode based upon temperature of the lean-NOx reduction catalyst. Exhaust gas flow is selectively diverted to the second converter element.08-06-2009
20090193791SYSTEM FOR ASSISTING REGENERATION OF POLLUTION MANAGEMENT MEANS ASSOCIATED WITH CATALYST FORMING MEANS - The invention concerns a system for assisting regeneration of pollution management means (08-06-2009
20100146940ACTIVE BUOYANT UREA HEATER - A variable buoyancy heater is provided. It comprises variable buoyancy float that includes a variable volume element. A first fluid is contained within the variable volume element and a heating element that is integral with the variable buoyancy float is provided. The heater is arranged to heat the first fluid wherein the variable volume element expands based on a temperature increase from the heating element, such that the variable buoyancy float becomes positively buoyant when the variable volume element expands and negatively buoyant when the heating element is off.06-17-2010
20110192147MODEL-BASED CONTROLS FOR SELECTIVE CATALYST REDUCTION SYSTEM - Systems and methods are provided for controlling ammonia slip downstream of a selective catalyst reduction (SCR) system. The SCR system can include a SCR reactor having a catalyst, inlet, and outlet. The SCR system can also include an injector for injecting a reductant into the SCR reactor at a location upstream from the inlet of the SCR reactor. An estimated value, a reference value, and an error between the two values of ammonia adsorbed on the catalyst surface can be provided. A saturation indication can also be provided to indicate whether the catalyst surface is saturated with the estimated value of adsorbed ammonia. The saturation indication and the error between the estimated and reference values of adsorbed ammonia can be used to adjust a command signal by an open-loop control scheme. The injection of the reductant into the SCR reactor can also be regulated by the command signal.08-11-2011
20080256932Exhaust Gas Purification System - An exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, has a particulate filter and a SCR catalytic converter arranged in the exhaust pipe in succession in the direction of flow, and a reducing-agent supply. Ammonia can be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing-agent supply. The exhaust-gas purification unit includes a hydrogen-generating unit for enriching the exhaust gas from the internal combustion engine with the hydrogen which it generates.10-23-2008
20080256931EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device includes a reducing agent adding valve for injecting a reducing agent into an exhaust pipe. The adding valve has a tip end portion having a nozzle and facing an internal space of the exhaust pipe. The tip end portion is disposed outwardly of an inner circumferential surface of the exhaust pipe. The adding valve is kept out of direct striking contact with the exhaust gas and hence is substantially free from thermal degradation and adhesion of deposits.10-23-2008
20100146942EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - An exhaust system of an internal combustion engine, in particular of a vehicle, has an insert through which exhaust gas flows, for purifying the exhaust gas, and a mixing chamber through which exhaust gas flows and which is arranged upstream of the insert through which exhaust gas flows. The mixing chamber includes at least one permeable wall and is arranged on a channel wall of the exhaust system and protrudes radially into the interior of the exhaust system. The exhaust system further has a vaporizer device that vaporizes an oxidizable liquid and introduces the vapor into the mixing chamber, and an ignition device that protrudes at least partly into the mixing chamber. The vaporizer device includes a glow element which is configured and heatable in such a way that an auto-ignition of the oxidizable vapor occurs on its surface.06-17-2010
20100146944Diesel Dosing System Relief Of Trapped Volume Fluid Pressure At Shutdown - A diesel dosing system for a vehicle includes a control valve (06-17-2010
20130081378EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside of an engine exhaust passage, in order from an upstream side, a hydrocarbon feed valve oxidation catalyst exhaust purification catalyst, and NO04-04-2013
20100050604SCR-LNT CATALYST COMBINATION FOR IMPROVED NOx CONTROL OF LEAN GASOLINE AND DIESEL ENGINES - An aftertreatment system for use in a lean burn engine is disclosed. In one embodiment, the aftertreatment system includes a first catalyst in communication with an exhaust stream from the engine; a selective catalytic reduction catalyst in communication with the exhaust stream and positioned downstream of the first catalyst; and a lean NO03-04-2010
20100162688FUEL INJECTION APPARATUS - A fuel injection apparatus (07-01-2010
20100043404USING GPS/MAP/TRAFFIC INFO TO CONTROL PERFORMANCE OF AFTERTREATMENT (AT) DEVICES - A method for managing an exhaust aftertreatment system within a vehicle including a catalyst device includes monitoring a digital map device providing a predicted vehicle operating condition through a travel route, and determining a predicted exhaust gas temperature profile based upon the monitoring of the digital map device. Operation of the catalyst device is controlled based upon the predicted exhaust gas temperature profile.02-25-2010
20100043406EXHAUST EMISSION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust emission control apparatus that is used with an internal combustion engine to occlude and reduce NOx without blocking the exhaust gas purification function of a catalyst. An NOx occlusion reduction type catalyst and ozone supply device are provided in an exhaust path of the internal combustion engine. The NOx occlusion reduction type catalyst includes a cell into which an exhaust gas flows. An inner surface of the cell is coated with a NOx retention layer and a catalyst layer so that the NOx retention layer and the catalyst layer are provided in the order named from the inner surface of the cell.02-25-2010
20100043405Exhaust purification device of an internal combustion engine - In an internal combustion engine, an NO02-25-2010
20130036724METHOD FOR METERING A REDUCING AGENT, METHOD FOR SETTING UP A CONTROL UNIT FOR A METERING DEVICE AND MOTOR VEHICLE HAVING A METERING DEVICE - A method for metering a reducing agent from a metering device to an exhaust gas treatment device includes initially determining at least one operating parameter of the metering device. An injector pressure at an injector for feeding the reducing agent into the exhaust gas treatment device is then calculated from the at least one operating parameter. Then, an opening time for the injector is calculated, in which at least the injector pressure determined in step b) is used. The injector is then opened for the opening time calculated in step c). A method for setting up or configuring a control unit for a metering device and a motor vehicle having a metering device are also provided.02-14-2013
20090158714ENGINE SYSTEM AND A METHOD FOR A REGENERATION OF AN EXHAUST GAS TREATMENT DEVICE IN SUCH A SYSTEM - The invention involves an engine system and a method for an engine system comprising an internal combustion engine comprising at least one cylinder, and an exhaust system comprising an exhaust gas treatment device, in which engine system the admittance of air and fuel is controllable by means of air flow control means and fuel control means, the method comprising performing an exhaust gas treatment device regeneration. The method comprises controlling, during the exhaust gas treatment device regeneration, the air flow control means and the fuel control means so as to provide a mixture to the exhaust gas treatment device with a lambda value of at least 1.0.06-25-2009
20090158713Exhaust Gas Purification System for Internal Combustion Engine - It is an object of the present invention to suppress NOx emissions while also suppressing an increase in unburned fuel emission and accidental fire in an exhaust gas purification system for an internal combustion engine that has a super charger and an EGR apparatus, when the internal combustion engine is in a transient operating state. In the present invention, a target charging pressure and a target EGR gas amount are calculated based on the operating state of the internal combustion engine. If the actual charging pressure has not reached the target charging pressure when the internal combustion is operating in a transient state, then the EGR gas amount is controlled to an amount smaller than the target EGR gas amount.06-25-2009
20090158712METHOD FOR CONTROLLING INJECTION IN A DIESEL ENGINE EXHAUST AFTERTREATMENT SYSTEM AND DIESEL ENGINE WITH EXHAUST AFTERTREATMENT SYSTEM - A method for controlling injection of a substance in a diesel engine exhaust aftertreatment system includes generating a feedforward signal as a function of a desired output signal, the desired output signal corresponding to an output sought to be achieved through injection of the substance. Actual system output is measured and an actual output signal is generated corresponding to an output actually achieved through injection of the substance. The desired output signal and the actual output signal are compared and an error signal is generated corresponding to a difference between the desired output signal and the actual output signal. A control signal is generated as a function of the error signal and the feedforward signal for controlling an amount of the substance to inject, and the feedforward signal is adjusted by an adaptive factor, the adaptive factor being a function of the error signal. A diesel engine is also provided.06-25-2009
20100107609METHOD FOR CONTROLLING A SCR CATALYST - A method for controlling a selective catalytic reduction catalyst in an exhaust line of an internal combustion engine is disclosed, wherein the supply of a quantity of a gaseous ammonia reductant to the SCR catalyst uses a closed-loop SCR catalyst model coupled to a SCR-out NOx sensor that measures a SCR-out NOx emission value. The closed-loop SCR catalyst model uses a relationship linking the measured SCR-out NOx value to the NOx conversion efficiency and the ammonia slip. The actual NH05-06-2010
20100031638DUAL ENGINE WORK VEHICLE WITH CONTROL FOR EXHAUST AFTERTREATMENT REGENERATION - A work machine having dual compression ignition engines each driving motor generators providing a power output to selective loads. The compression ignition engines each have an exhaust aftertreatment device requiring regeneration in accordance with a selected parameters. A controller controls motor/generators or hydraulic pump/motors associated with the diesel engines to either transfer load between one or the other of the motor/generators or pump/motors to impose a load on one of the engines sufficiently high to produce passive regeneration. In the event that loads driven by the motor/generators or pump/motors are too low, one of the engines may be shut off or the loads increased.02-11-2010
20080282679Diesel dosing system relief of trapped volume fluid pressure at shutdown - A diesel dosing system for a vehicle includes a control valve (11-20-2008
20120180459Exhaust Gas Purification System for Working Machine - Disclosed is an exhaust gas purification system for a working machine. The system is provided with a filter for capturing particulate matter contained in exhaust gas from an engine, a differential pressure sensor for detecting a differential pressure between an exhaust upstream side and an exhaust downstream side of the filter, and a controller having a regeneration determination unit for determining whether or not a time, at which forced regeneration is needed, has been reached. The controller includes one that has a variation determination unit for determining whether or not a state quantity relevant to an operation of the engine, for example, an engine speed has varied abruptly and that, when the state quantity is determined to have abruptly varied, performs processing to invalidate the determination by the regeneration determination unit during a predetermined time in which an effect of the state quantity is considered to diminish.07-19-2012
20100005788Method For Regenerating A Diesel Particulate Filter - A method of regenerating a diesel particulate filter involves directing an exhaust stream from a combustion engine through the diesel particulate filter and selectively introducing a syngas stream at least periodically into the diesel particulate filter to regenerate it. The syngas stream is introduced at a first average flow rate during an initial regeneration stage and at a second average flow rate during a subsequent regeneration stage. In preferred embodiments the flow rate is varied in order to reduce temperature spikes and/or the rate at which CO slips through the filter during regeneration. In certain embodiments the first average flow rate is lower than the second average flow rate.01-14-2010
20100005786METHOD, DEVICE AND COMPUTER PROGRAM PRODUCT FOR DIAGNOSING OF AT LEAST ONE EXHAUST EMISSION CONTROL UNIT - A method, device and computer program product are provided for diagnosing of a NOx-reducing catalyzer that can be regenerated and/or of a three-way valve for directing the flow of exhaust gases into a bypass pipe, and/or of a clean-up catalyzer. All the components can be included in one and the same exhaust emission control system. The diagnosing of the NOx-reducing catalyzer and of the three-way valve is carried out by method steps comprising measurement of the drop in pressure across the NOx-reducing catalyzer. The diagnosing of the clean-up catalyzer is carried out by method steps comprising measurement of the increase in temperature in the clean-up catalyzer. In the event of reduced functionality of the NOx catalyzer, a deSOx is carried out. A fault code is generated in the event of reduced functionality of the three-way valve or of the clean-up catalyzer.01-14-2010
20100005785Method for Reducing Emissions in a Motor Vehicle by Controlling the Generator Output - A method for influencing exhaust-gas characteristics of a motor vehicle having a combustion engine in which the exhaust-gas composition and/or the exhaust-gas temperature are/is influenced with the aid of an emission management system that includes a control device having an emission management algorithm and at least one control element. The exhaust-gas values are able to be optimized, and the fuel consumption lowered if the generator output is increased or lowered by the emission management system within the framework of an emission management measure.01-14-2010
20100326056PROCEDURE AND DEVICE FOR A SWITCHING PRESSURE CALCULATION AT A METERING VALVE - The invention relates to a procedure for a switching pressure calculation at a metering valve of a fuel metering device for metering fuel into an exhaust gas system of a combustion engine with a component that is assigned to the exhaust gas system of the combustion engine for a regeneration, for a temperature impinge and/or for a thermo management, whereby the fuel is injected before this component in streaming direction of the exhaust gas. The invention concerns furthermore a corresponding device for implementing the procedure.12-30-2010
20120216512EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust emission control device includes a catalytic converter arranged in an exhaust passage of the internal combustion engine. The catalytic converter includes an upstream catalytic converter and a downstream catalytic converter arranged on a downstream side of the upstream catalytic converter. The upstream catalytic converter includes a first support and a first catalyst supported on the first support. The first catalyst includes a first lower layer catalyst and a first upper layer catalyst. Pd in the first lower layer catalyst is supported only on the oxygen storage component contained in the first catalyst. The first upper layer catalyst is provided on the first lower layer catalyst, Pd in the first upper layer catalyst being supported on each of the oxygen storage component and Al08-30-2012
20120216511INSTANTANEOUS NEUTRALIZATION AND PURIFICATION DEVICE FOR SMOKE AND EXHAUST GAS DISCHARGED FROM AUTOMOBILE - Disclosed is an instantaneous neutralization and purification device for smoke and exhaust gas discharged from an automobile, which includes a first purification treatment device connected to an exhaust pipe, a connection pipe connected to the first purification treatment device, and a second purification treatment device connected to the connection pipe. The first purification treatment device includes a combustion system and a filtration system. A first pressure sensor detects an exhaust gas pressure greater than a threshold and signals a fuel tank to supply fuel to the combustion system for combustion and heating the filtration system to cause combustion of carbon build-up. A second pressure sensor detects the exhaust gas pressure becoming lower than a threshold and signals the fuel tank to stop supply of fuel. The exhaust gas is then conducted through the connection pipe, where an alkaline solution is sprayed to neutralize acids of the exhaust gas.08-30-2012
20090094963Exhaust particulate matter measuring apparatus - A PM sensor for measuring particle matter in exhaust gas is disposed between a three-way catalyst and a muffler in an exhaust pipe, and has an oxidation catalyst and an electrical heater that are stacked together, and a temperature sensor that measures a temperature of the oxidation catalyst interposed between the oxidation catalyst and the electrical heater. The oxidation catalyst carries a ceria as an oxygen-storing agent that occludes oxygen in the exhaust gas, and a ECU calculates a sediment amount of the exhaust particulate matter based on an amount of temperature rise when the electrical heater heats the oxidation catalyst and an accumulated value of an intake air amount.04-16-2009
20090094962METHOD AND DEVICE FOR REGENERATING AN EMISSION CONTROL SYSTEM - The invention relates to a method for regenerating an emission control system of an internal combustion engine, comprising a storage catalytic converter, a first exhaust gas probe being situated in an exhaust gas tract upstream of the storage catalytic converter and a second exhaust gas probe being situated in a second exhaust gas tract downstream of the storage catalytic converter. A first output signal of a first exhaust gas probe and a second output signal of a second exhaust gas probe are supplied to an engine management system and the storage catalytic converter is regenerated by being exposed to a reductant in a regeneration phase. If the quantity of reductant is controlled by the engine management system during the regeneration phase, whereby said system detects the quantity of reductant that is present downstream of the storage catalytic converter by means of the second output signal of the second exhaust gas probe situated downstream of said converter, the charging of reductant can be significantly reduced with respect to an optimised dosage. Excess consumption of fuel or reductant as a result of the regeneration of the storage catalytic converter is minimised. In addition, the method improves the emission values, thus significantly contributing to the maintenance of emission limits.04-16-2009
20090272103Exhaust treatment system implementing regeneration 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 an exhaust flow of the power source. The exhaust treatment system may further have a heat source located to elevate the temperature of the exhaust flow. The exhaust treatment system may also have a first sensor and a second sensor. The exhaust treatment system may further have a controller in communication with the heat source, the first sensor, and the second sensor. The controller may be configured to receive a particulate matter load value and a power source load value and activate the heat source when the particulate matter load value is above a particulate matter load threshold value and the power source load value is below a power source load threshold value that is indicative of the exhaust flow being within an exhaust flow range.11-05-2009
20090272102APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO11-05-2009
20090272101APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING AMMONIA SLIP FROM AN SCR CATALYST - Various embodiments of an apparatus, system, and method are disclosed for reducing NO11-05-2009
20090064667DEVICE FOR DELIVERING A REDUCING AGENT TO AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a device for supplying a reducing agent into an exhaust system of an internal combustion engine. The device includes a delivery pump for delivering the reducing agent from a storage tank into an exhaust tube of the exhaust system. A metering device is provided between the delivery pump and the exhaust tube, which metering device supplies reducing agent, which is delivered continuously by the delivery pump, in an intermittent fashion into the exhaust strand tube.03-12-2009
20090056316Exhaust Gas Purification Method and Exhaust Gas Purification System - In an exhaust gas purification system (03-05-2009
20090056315METHOD FOR REDUCING NH3 RELEASE FROM SCR CATALYSTS DURING THERMAL TRANSIENTS - A control system includes a temperature module that determines a temperature of a selective catalytic reduction (SCR) catalyst, a derivative module that determines a derivative of the temperature, and a dosing module that regulates a dosage of a reductant supplied to the SCR catalyst to regulate an engine out NOx level. A control module generates control signals based on the temperature derivative, wherein the control signals regulate an amount of reductant accumulated within the SCR catalyst to reduce reductant release from the SCR catalyst during thermal transients.03-05-2009
20110011063EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas control apparatus includes an oxidation catalyst, a compact oxidation catalyst having a smaller cross section than that of an engine exhaust passage, a fuel supply valve, a glow plug, and an electronic control unit. The control modes for the exhaust gas control apparatus include a first control mode where the fuel is supplied from the fuel supply valve, heated by the glow plug, and ignited, a second control mode where the fuel is supplied from the fuel supply valve, and heated by the glow plug but is not ignited, and a third control mode where the fuel is supplied from the fuel supply valve and the glow plug does not provide heating. The electronic control unit selects the first or third control mode in the operation region where ignition is possible, and selects the second or third control mode in the operation region where ignition is not possible.01-20-2011
20110011062METHOD AND SYSTEM FOR CONTROLLING ACTIVE REGENERATION OF A DIESEL PARTICULATE FILTER - Method of controlling the active regeneration of a particulate filter through dynamic control of the temperature at the outlet of an oxidation catalyst.01-20-2011
20130061576SELECTIVE CATALYTIC REDUCTION (SCR) DEVICE CONTROL SYSTEM - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, an oxidation catalyst (“OC”) device, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The OC device is in fluid communication with the exhaust gas conduit. The OC device adsorbs hydrocarbons and is selectively activated to induce oxidation of the hydrocarbons in the exhaust gas. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located within the OC device and is selectively activated to produce heat and induce further oxidation of the exhaust gas. The EHC device has an oxidation catalyst compound disposed thereon for converting nitrogen oxide (“NO”) to nitrogen dioxide (“NO03-14-2013
20100024400EMISSION CONTROL SYSTEM AND METHOD - A system includes an exhaust conduit configured to conduct a stream of exhaust gas, wherein the exhaust conduit comprises a selective catalytic reduction catalyst reactor comprising a first catalyst composition; an fuel source configured to introduce a fuel into the exhaust gas stream within the exhaust conduit upstream of the selective catalytic reduction catalyst reactor; a catalytic partial oxidation reformer in fluid communication with the exhaust gas stream and upstream from the selective catalytic reduction catalyst reactor, wherein the catalytic partial oxidation reformer can introduce a hydrogen-rich syngas co-reductant into the exhaust gas stream, when a temperature of the exhaust fluid is less than a determined threshold temperature.02-04-2010
20090235646EXHAUST GAS PURIFICATION METHOD AND SYSTEM - In regeneration control of an exhaust gas purification system (09-24-2009
20090235649Method for Regenerating a Diesel Particulate Filter - A method is disclosed for regenerating a diesel particulate filter without excessively increasing NO09-24-2009
20090235648DEVICE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE - A device for controlling an internal combustion engine comprises a device for trapping particulate matter (PM) in exhaust gas in an exhaust passage, means for supplying ozone to the particulate matter trapping device from the upstream thereof to oxidize and remove PM deposited in the device, and means for interrupting the fuel injection of the internal combustion engine upon the execution of ozone supply by the ozone supply means. It is possible to prevent components consuming ozone, such as NOx, from being contained in the exhaust gas of the internal combustion engine, whereby ozone is effectively usable.09-24-2009
20090235647Method for Controlling Exhaust Gas Purification System and Exhaust Gas Purification System - In regeneration control in a manual regeneration mode, when a first exhaust gas temperature (Tg09-24-2009
20100050606UREA TANK ASSEMBLY - Exemplary embodiments of the present invention are directed towards improved systems and methods for the delivery of a urea solution to an exhaust gas treatment system. In one particular exemplary embodiment, a urea tank assembly is provided. The urea tank assembly includes a reservoir defining a fluid inlet opening for receiving urea solution and a fluid outlet opening for discharge of the urea solution. The urea tank further includes a vented hollow member located within the reservoir. The vented hollow member defines an internal hollow portion and a plurality of openings for providing fluid flow between the reservoir and the internal hollow portion. The urea tank further includes a heater located along the vented hollow member to cause heating of urea solution within the internal hollow portion and the reservoir. The urea tank further includes a fluid pump located within the reservoir. The fluid pump is in fluid communication with the internal hollow portion and the reservoir to move urea solution located therein through the fluid outlet opening. The fluid pump also includes a temperature sensor configured to determine the temperature of the urea solution within the reservoir, wherein heating of the urea solution is based upon the temperature of the urea solution within the reservoir.03-04-2010
20090025372Method for Controlling Exhaust Gas Purification System and Exhaust Gas Purification System - In regeneration control, when the catalyst temperature index temperature (Tg01-29-2009
20090013671Injection device for reagent - An injection device for administering a reagent into an exhaust chamber of an internal combustion engine, comprising a device inlet and a device outlet and a sub-assembly held securely within a device housing. The sub-assembly comprises (i) valve housing defining a valve seat, (ii) valve means movable outwardly from the valve housing, away from the valve seat, to permit the reagent to be delivered into the exhaust chamber through the device outlet, whereby a force is applied to the valve means due to reagent delivered to the device inlet which serves to urge the valve means away from the valve seat, and (iii) bias means for applying a biasing force to the valve means which serves to urge the valve means against the valve seat so as to prevent delivery of the reagent through the device outlet into the exhaust chamber. The device housing is a separate part from the valve housing and has a housing bore within which the valve housing is held securely so as to hold the sub-assembly securely within the device housing.01-15-2009
20090013670Reservoir for a fluid dosing system - A reservoir for holding a fluid for supply to a fluid dosing device for introducing the fluid into a gas flow, the reservoir comprising: an outer container; an inner container located within the outer container, the inner container being arranged to hold the fluid; an outlet in the outer container, the outlet being in fluid communication with the inner container; wherein the inner container is flexible.01-15-2009
20100077734System and Method For Coupled DPF Regeneration and LNT DeNOx - A diesel exhaust aftertreatment system comprises an LNT within an exhaust line. A low thermal mass DPF and a low thermal mass fuel reformer are configured within the exhaust line upstream from the LNT. A thermal mass is configured downstream from the fuel reformer and the DPF, but upstream from the LNT. For LNT denitration, the fuel reformer is rapidly heated and then used to catalyze steam reforming. The DPF is also rapidly heat each time the fuel reformer is heated and the LNT denitrated. The system operates to regenerate the DPF each time the LNT is denitrated. Preferably, a second DPF is provided to augment the performance of the first DPF. Preferably, the first DPF is small and of the flow through type whereas the second DPF is much larger and of the wall flow filter type. The second DPF can be used as the thermal mass.04-01-2010
20100089039EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO04-15-2010
20080295498EXHAUST GAS PURIFYING APPARATUS FOR INTERNATIONAL COMBUSTION - An exhaust gas purifying apparatus for an internal combustion engine including an ammonia generating device and a NOx removing device. The ammonia generating device is provided in an exhaust system of the engine, and generates ammonia by a reaction of NOx and reducing components in exhaust gases when the exhaust gases are in a reducing state. The NOx removing device is provided downstream of the ammonia generating device, and adsorbs NOx in the exhaust gases when the exhaust gases are in an oxidizing state. The NOx removing device reduces the adsorbed NOx to generate ammonia and retains the generated ammonia when the exhaust gases are in the reducing state.12-04-2008
20080295495Exhaust Gas System for Diesel Vehicles with an SCR Catalytic Converter - An exhaust gas system for diesel vehicles has a first exhaust line and a second exhaust line that can be connected at the exhaust end to an engine. The first and second lines with their ends pointing downstream are connected to an SCR catalytic converter and a device with which a reducing agent can be introduced into the exhaust gas at a location situated upstream from the SCR catalytic converter. An injection unit for the reducing agent is provided only on the first exhaust line, and a mixing device is provided upstream from the SCR catalytic converter so that the exhaust lines open into the mixing device, where the exhaust gas stream of the first exhaust line to which the reducing agent has been added becomes mixed with the exhaust gas stream from the second exhaust line that is free of reducing agent.12-04-2008
20080295494Multi-engine system with on-board ammonia production - A power system is provided having a first power source including at least one engine configured to combust a first air/fuel mixture and produce a first exhaust stream. The system also has a first exhaust passageway fluidly connected to the first power source and configured to receive the first exhaust stream. In addition, the system has a second power source including at least one engine configured to combust a second fuel/air mixture and produce a second exhaust stream. Furthermore, the system has a second exhaust passageway fluidly connected to the second power source and configured to receive the second exhaust stream. The system further has a first catalyst disposed within the first exhaust passageway to convert at least a portion of the first exhaust stream to ammonia12-04-2008
20080295493Catalyst temperature control system for a hybrid engine - A temperature control system is provided for use with a hybrid engine. The system includes a controller configured to receive a signal representative of a temperature associated with a selective catalytic reduction (SCR) catalyst configured to receive an exhaust gas stream produced by a hybrid engine. The controller is also configured to transmit a first signal to a generator operably coupled to a battery and the hybrid engine, and transmit a second signal to a heater configured to heat the SCR catalyst, wherein the first and second signals are configured to regulate the temperature associated with the SCR catalyst.12-04-2008
20090205320Reducing agent heating system and method - A reducing agent heating system and method. The reducing agent heating system provides a dual energy heating strategy using both an electric heater and an engine coolant line such that emission control may be promoted efficiently. The electric heater and engine coolant line are disposed in close proximity to the reducing agent such that efficient and quick thawing of frozen or freezing reducing agent is facilitated.08-20-2009
20100251699SYSTEM AND METHOD FOR OBTAINING AN OPTIMAL ESTIMATE OF NOx EMISSIONS - A control system for providing an optimal estimate of NOx emission in an exhaust during a selective catalytic reduction process is provided. The control system includes a continuous emission monitoring sensor configured to generate a responsive signal representing a first estimate of NOx emission; wherein the responsive signal has a first time lag between a time of measurement of NOx emission and the time when the corresponding responsive signal is made available by the continuous emission monitoring sensor, and the continuous emission monitoring sensor has a first time constant. The control system also includes a virtual sensor configured to generate a relatively faster responsive signal representing a second estimate of NOx emission. The control system further includes a processor that includes a time delay compensation circuit configured to introduce a second time lag in the relatively faster responsive signal, wherein the second time lag matches the first time lag. The processor also includes a low pass filter circuit coupled to the time delay compensating circuit, wherein the low pass filter circuit has a second time constant matching the first time constant to generate a time delayed signal representing a third estimate of NOx emission. The processor is further configured to subtract the time delayed signal from the summation of the responsive signal and the relatively faster responsive signal to generate the optimal estimate of the NOx emission, wherein the optimal estimate is fed as a feedforward signal into an injection system in the selective catalytic reduction process.10-07-2010
20090077952SECONDARY-AIR SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE - A secondary-air supply system for an internal combustion engine, including a catalyst provided in an exhaust passage and configured to purify exhaust gas from the engine, and a secondary-air supply source and a secondary-air valve provided in a secondary-air passage connected upstream from the catalyst. A secondary-air supply device is configured to drive the secondary-air supply source and to open the secondary-air valve to supply secondary air to the exhaust passage upstream from the catalyst under a warm-up condition of the engine. Secondary-air supply control means is configured to control the secondary-air supply device to drive the secondary-air supply source and to open the secondary-air valve under a high-load operating condition where a flow rate of the exhaust gas is high, the high-load operating condition being different from the warm-up condition.03-26-2009
20110271660EXHAUST TREATMENT METHODS AND SYSTEMS - A method of controlling an exhaust treatment system, comprising: selectively determining a first control state from a plurality of control states based on an exhaust temperature and a plurality of activation temperatures; estimating a reductant dose based on the control state; and controlling an injection of a reductant to the exhaust treatment system based on the reductant dose.11-10-2011
20110283685Exhaust Treatment System With Hydrocarbon Lean NOx Catalyst - A system for treating an exhaust stream from an engine includes a main exhaust passageway adapted to receive the exhaust stream from the engine. A side branch is in communication with the main exhaust passageway. A regeneration unit is positioned within the side branch for combusting a fuel and heating the exhaust flowing through the main exhaust passageway. A lean NO11-24-2011
20090151331Exhaust Purification Device of Internal Combustion Engine - An internal combustion engine in which a main SO06-18-2009
20090113877Reductant Injection System Diagnostics - A method is described for controlling operation of a reductant injection system having a pump, injector, and pressure sensor located upstream of the injector in the reductant injection system. The method includes, under engine starting conditions: disabling the pump; and opening the injector. The method further includes indicating degradation of the sensor when the sensor output, during the disabled pump operation and opened injector, disagrees with exhaust pressure.05-07-2009
20120186236EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification device for an engine has a filter which is provided in an exhaust passage of the engine, collects particles in exhaust gas, and is subjected to Active Regeneration for burning and removing the collected particles by heating, and a diesel oxidation catalyst which is provided on the upstream side of the filter and increases the temperature of the filter. The exhaust gas purification device further has a control unit which effects combustion using the diesel oxidation catalyst to perform the Active Regeneration of the filter by injecting fuel at a timing when no contribution is made to combustion in a combustion chamber of the engine when the quantity of the particles collected in the filter reaches a predetermined quantity or more, or when the quantity of the particles collected in the filter is less than the predetermined quantity and an elapsed time from the last reconditioning of the filter reaches a predetermined time. The control unit includes a fuel mixing quantity calculation unit which calculates a mixing quantity of the fuel mixed into an engine oil at the time of the Active Regeneration of the filter, and a fuel evaporation quantity calculation unit which calculates an evaporation quantity of the fuel from the engine oil. A mixing ratio of the fuel in the engine oil is calculated from the mixing quantity of the fuel and the evaporation quantity of the fuel from the engine oil, and the predetermined time or an operation mode of the engine is adjusted such that the mixing ratio is not more than a prescribed control value.07-26-2012
20090120069Method for Control of Exhaust Gas Purification System, and Exhaust Gas Purification System - The degree of a deterioration in catalyst is determined when the following requirements are satisfied: the operating state of an internal combustion engine (E) is in a predetermined operating state; and the temperature (T05-14-2009
20090145114EXHAUST EMISSION CONTROL DEVICE - Even in a vehicle with travel pattern of continuing operational status with low exhaust temperature, a satisfactory NO06-11-2009
20110296818VEHICLE MOUNTED ENGINE CONTROL APPARATUS - A vehicle mounted engine control apparatus serves to prevent air fuel ratio control from becoming an excessively fuel rich state by sequentially actuating heaters for early activation of a pair of exhaust gas sensors arranged in an upstream and a downstream position of a catalyzer. Electric power is first supplied to a heater for an upstream exhaust gas sensor, and the supply of electric power to a heater for a downstream exhaust gas sensor is started without waiting for activation of the upstream exhaust gas sensor, if a heater current declines to a predetermined value or less. When the upstream exhaust gas sensor is inactive, an output signal of an upstream air fuel ratio control unit inputted to a fuel injection control unit is restricted to a predetermined fuel rich command, and when the downstream exhaust gas sensor is inactive, an output signal of an downstream air fuel ratio control unit inputted to the upstream air fuel ratio control unit is restricted to a predetermined fuel rich command.12-08-2011
20090320455METHOD FOR CONTROLLING A FACILITY FOR TREATING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE - A facility for treating exhaust gases from an internal combustion engine (12-31-2009
20100170227EXHAUST GAS CLEANING SYSTEM FOR ENGINEERING VEHICLE - An exhaust gas cleaning system for an engineering vehicle, such as a hydraulic excavator, is capable of performing manual regeneration control of a regeneration fuel injector 07-08-2010
20100170226DIAGNOSTIC METHOD FOR A REAGENT MATERIAL TO BE INTRODUCED INTO AN EXHAUST GAS REGION OF AN INTERNAL COMBUSTION ENGINE AND DEVICE FOR PERFORMING THE METHOD - The invention relates to a diagnostic method for a reagent to be introduced into an exhaust gas region of an internal combustion engine, or a precursor of the reagent, which is required to convert at least one exhaust gas component in a catalytic converter, and to a device for performing the method. A change in the load of the internal combustion engine is first determined relative to time. If a load change threshold is exceeded, a first release signal is provided. The relative reagent material fill level in the catalytic converter is further determined. If a relative fill level threshold value is exceeded, a second release signal is provided. The reagent material slack occurring downstream of the catalytic converter is compared to a reagent material slack threshold value. If the first and second release signals are present and the reagent material slack threshold value is exceeded, the reagent material is considered to be of sufficient quality.07-08-2010
20100170225Exhaust treatment system having a reductant supply system - An exhaust treatment device is disclosed. The exhaust treatment device includes a supply of reductant at a first pressure and an exhaust passage. The device further includes a venturi located within the exhaust passage and configured to facilitate reductant entry into the exhaust passage by reducing a pressure of exhaust flowing through the exhaust passage to a second pressure that is less than the first pressure.07-08-2010
20090165443Control System for Internal Combustion Engine, and Control Method for Internal Combustion Engine - In an exhaust passage, a pressure detection means is provided on the upstream side of a filter, and an exhaust throttle valve is provided on the downstream side of the filter. And, when the operational state of the internal combustion engine is a steady operational state (in a step S07-02-2009
20090188239SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN A DIESEL ENGINE EXHAUST LINE - A system for regenerating a catalytic particulate filter located in a diesel engine exhaust line, including an electronic control unit, a controlled fuel injector arranged upstream of the catalytic particulate filter and supplied with fuel by a controlled pump, and a sensor for measuring the fuel feeding pressure of the injector. Further, a detection mechanism detects an open position locking of the injector based on the fuel feeding pressure of the injector.07-30-2009
20080307774SELECTIVE CATALYST REDUCTION LIGHT-OFF STRATEGY - An emissions control system comprises a temperature determination module and an emissions control module. The temperature determination module determines a first temperature of a heater element of a diesel particulate filter (DPF) assembly in an exhaust system and determines a second temperature of a catalyst of the DPF assembly. The emissions control module selectively activates the heater element, selectively initiates a predefined combustion process in an engine based upon the first temperature, and selectively starts a reductant injection process based upon the second temperature.12-18-2008
20090071126HIGH EXHAUST TEMPERATURE, ZONED, ELECTRICALLY-HEATED PARTICULATE MATTER FILTER - A system comprises a particulate matter (PM) filter including an upstream end for receiving exhaust gas and a downstream end. A zoned electric heater is arranged one of spaced from and in contact with the upstream end. A control module increases an exhaust temperature above a soot oxidation temperature before activating said electric heater to regenerate downstream portions of the PM filter.03-19-2009
20100101218NOx PURIFICATION SYSTEM AND METHOD FOR CONTROL OF NOx PURIFICATION SYSTEM - In an NOx purification system and a method for control of the NOx purification system, two oxidation catalysts are provided upstream of an ammonia solution supply unit, and the in-cylinder fuel injection is so controlled that hydrocarbon in exhaust gas is mainly oxidized by the upstream oxidation catalyst and nitric oxide in the exhaust gas is mainly oxidized by the downstream oxidation catalyst. In the purification of NOx in the exhaust gas by feeding an ammonia solution for NOx reduction to a selective reduction NOx catalyst, this technique enables the system to adjust the concentrations of HC, NO and NO04-29-2010
20100101216Exhaust Gas Purification Device for Internal Combustion Engine - An exhaust gas purification device for an internal combustion engine including a plurality of combustion exhaust systems is disclosed. Each of the combustion exhaust system is provided with a cylinder group including a plurality of cylinders, a cylinder head, an exhaust manifold, and an exhaust passage connected to the exhaust manifold for discharging the exhaust gas. In each of the plurality of cylinder groups, the discharge of the exhaust gas from the cylinders is started at an irregular interval and a blank period in which exhaust gas is not discharged from the cylinders exists. The purification device includes a purifier, an additive supply device, and a computer. The purifier purges impurities from the exhaust gas in the exhaust passage. The additive supply device supplies additive to the purifier. The computer controls the additive supply device so that each additive supply device intermittently performs a continuous supply of additive and performs the continuous supply of additive throughout the entire blank period in the corresponding combustion exhaust system.04-29-2010
20090151329Method for regeneration a nitrogen oxide storage catalyst - To remove the nitrogen oxides from the exhaust gas from lean-burn engines, these engines are equipped with a nitrogen oxide storage catalyst, which has to be regenerated frequently by the engine being briefly switched to rich-burn mode. The regeneration is usually initiated when the nitrogen oxide concentration downstream of the catalyst rises above a permissible value. In this context, there is a risk of the bed temperature of the catalyst during and after regeneration being pushed into a range with incipient thermal desorption of the nitrogen oxides on account of the heat which is released during the conversion of the nitrogen oxides by the reducing constituents of the exhaust gas. This can lead to increased nitrogen oxide emission both during the regeneration itself and after the engine has been switched back to lean-burn mode. To eliminate this problem, it is proposed to divide the rich-burn mode into two rich pulses which follow one another in time, the first rich pulse being of shorter duration than the second rich pulse.06-18-2009
20090151335ENGINE EXHAUST EMISSION PURIFICATION APPARATUS - An engine exhaust emission purification apparatus for reducing and purifying NOx in the exhaust emission by using a liquid reducing agent having a temperature maintenance device for maintaining a temperature of at least a part of a liquid reducing agent supply system configured by an injection nozzle and piping of the injection nozzle at a temperature lower than a boiling point of a solvent of the liquid reducing agent or equal to or higher than a melting point of dissolved matter in which the liquid reducing agent existing in the liquid reducing agent supply system conducts heat exchange with the liquid reducing agent supply system thereby being maintained at a temperature lower than the boiling point of the solvent or equal to or higher than the melting point of the dissolved matter and resultantly, occurrence of precipitation of the dissolved matter due to evaporation of only the solvent in the liquid reducing agent supply system does not occur, and even if precipitation of the dissolved matter occurs, the dissolved matter per se is melt away to prevent an injection hole of the injection nozzle from being clogged.06-18-2009
20090151334Apparatus for Reducing Nitrogen Oxide in Exhaust Pipe - An apparatus for reducing nitrogen oxide in an exhaust pipe, may include a nitrogen oxide sensor that is mounted in the exhaust pipe and that measures amount of the nitrogen oxide in exhaust gas, a nozzle that is disposed on the exhaust pipe to be spaced apart from the nitrogen oxide sensor to a downstream side of the nitrogen oxide sensor by a first predetermined length and that injects urea corresponding to the amount of the nitrogen oxide, a mixer that mixes the urea with the exhaust gas and that is disposed at a downstream side of the nozzle on the exhaust pipe to be spaced apart by a second predetermined length from the nozzle, and a de-nitrification catalyst reaction device that is disposed at a downstream side of the mixer on the exhaust pipe, purifies the nitrogen oxide, and includes an inlet portion having a predetermined length.06-18-2009
20090151333CONTROL METHOD FOR TEMPORARILY INCREASING THE EXHAUST GAS TEMPERATURE - The invention relates to a control method for increasing the exhaust gas temperature of an internal combustion engine, which has at least one exhaust gas aftertreatment device in its exhaust tract, and which has an exhaust gas recirculation system, to which a regulating system is assigned. In order to increase the temperature of the exhaust gas and avoid engine oil dilution due to retarded post-injections, the regulating system increases the exhaust gas back-pressure while maintaining an exhaust gas recirculation rate, and increases a fuel injection quantity into the combustion chamber during the main injection.06-18-2009
20090151332Exhaust gas purification system for internal combustion engine - The task for the present invention is to reduce more of an oxide that is stored in a NOx storage reduction catalyst, even in a case where a clogging has occurred in a reducing agent adding valve that is provided in an exhaust passage of an internal combustion engine. The present invention is provided with rich spike control performing means that, when an oxide that is stored in the NOx storage reduction catalyst is reduced, performs a rich spike control and that, when lowering the air-fuel ratio in the exhaust gas, performs addition of a reducing agent by the reducing agent adding valve multiple times, which is performed when a crank angle of the internal combustion engine is in a specified range. When the clogging has occurred in the reducing agent adding valve, the number of times the air-fuel ratio in the exhaust gas is lowered while the rich spike control is being performed by the rich spike control performing means is increased.06-18-2009
20100122526METHOD OF CONTROLLING THE OPERATION OF A SELECTIVE CATALYTIC REDUCTION PLANT - A method of controlling the feeding of a reducing agent, such as urea or ammonia, to a selective catalytic reduction reactor, which is operative for removing NOx from a process gas of a process plant, comprising the steps of estimating a present value of at least one predetermined parameter which is indicative of the amount of NOx that needs to be removed from said process gas in the selective catalytic reduction reactor. The rate of increase of said at least one predetermined parameter is then estimated. When said estimated rate of increase pf said at least one predetermined parameter is found to be positive, the amount of said reducing agent being supplied is increased to a higher value than would be the case if said at least one predetermined parameter were to be kept constant at the estimated present value thereof.05-20-2010
20110078999STATE OF CHARGE CATALYST HEATING STRATEGY - A control system includes a state of charge module and a control module. The state of charge module receives a parameter associated with a battery in a vehicle and determines a state of charge of the battery based on the parameter. The control module activates a heater in a catalytic converter in an exhaust system of the vehicle based on the state of charge.04-07-2011
20100126143DUAL BED CATALYST SYSTEM FOR NOx REDUCTION IN LEAN-BURN ENGINE EXHAUST - A method for reducing nitrogen oxides including NO and NO05-27-2010
20090308056PROCEDURE AND DEVICE FOR THE PURIFICATION OF EXHAUST GAS - The invention relates to a procedure for purifying exhaust gas in the exhaust gas duct of a combustion engine with an exhaust gas purification system and a SCR-catalyzer that is arranged in the exhaust gas purification system for a selective catalytic reduction of nitrous gases (SCR), whereby reducing agents for the selective catalytic reduction of nitrous gases can be added to the exhaust gas in direction of the flow before the SCR-catalyzer. According to the invention it is provided that the exhaust gas is led through a catalyzer for converting nitrous gases with hydrocarbons and subsequently through the SCR-catalyzer and that the operating parameters are adjusted in a first operating phase in such a way, that nitrous gases are mostly converted at the catalyzer for converting nitrous gases with hydrocarbons and that the operating parameters are adjusted in a second operating phase in such a way, that nitrous gases are mostly converted at the SCR-catalyzer. The adjustments for the first operating phase are selected at the start of the combustion engine. The catalyzer is heated to its operating temperature in this operating phase for the conversion of nitrous gases with hydrocarbons. Because it is arranged before the SCR-catalyzer and a particle filter that is usually arranged in front of it, its heating takes place very fast and the output of nitrous gases in the starting phase of the combustion engine can be reduced as opposed to the state of the art. The normal operation of the combustion engine is characterized by a lean mixture composition and therefore by an oxygen-rich exhaust gas. This is adjusted in the second operating phase, in which nitrous gases are converted in the SCR-catalyzer that is now heated to its operating temperature.12-17-2009
20100083640ENGINE-OUT NOX VIRTUAL SENSOR USING CYLINDER PRESSURE SENSOR - A Method for estimating NOx creation in a combustion process of a four-stroke internal combustion engine includes monitoring engine sensor inputs, modeling parameters descriptive of said combustion process based upon said engine sensor inputs, and estimating NOx creation with an artificial neural network based upon said parameters.04-08-2010
20100077731BURNER FOR REGENERATION OF DIESEL PARTICULATE FILTER - Provided is a burner for regenerating a diesel engine particulate filter. The burner includes: a combustion chamber for receiving a exhaust gas through connecting pipes from a diesel engine; a carburetor including a gasifying chamber for gasifying a liquid fuel, an atomizer for atomizing and supplying the liquid fuel to the gasifying chamber, and a convey air inflow line for flowing an external air into the gasifying chamber for conveying the gasified fuel into a mixed gas supplying unit; a mixed gas supplying unit for mixing the gasified fuel with an external air for burning, and supplying the mixed gaseous fuel to the combustion chamber; a combustor disposed in the combustion chamber for injecting the mixed gaseous fuel; an igniter for igniting the mixed gaseous fuel injected from the combustor; and a flame sensor for sensing whether the flame is made on the surface of the combustor or not.04-01-2010
20100089038EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - An internal combustion engine wherein an HC treatment catalyst (04-15-2010
20100089037OPTIMIZED DISCRETE LEVEL SENSING SYSTEM FOR VEHICLE REDUCTANT RESERVOIR - An example emissions-control system of a vehicle includes a reservoir configured to contain a reductant solution, and an SCR device disposed in the exhaust system and configured to consume the reductant solution. The example emissions-control system further includes a base sensor responsive to whether a volume of the reductant solution exceeds a base volume, wherein the base volume is a sum of a dead volume of the reservoir plus a standard volume, and one or more elevated sensors corresponding to one or more elevated volumes. The example emissions-control system further includes an emissions sensor responsive to a NOX level in the exhaust system, and a misformulation indicator operatively coupled to the emissions sensor and to at least one of the base sensor and an elevated sensor, and configured to indicate when an excess NOX emission follows, within an interval, an increase in the volume of the reductant solution above the base volume or an elevated volume. The example emissions-control system may further include an insufficiency indicator operatively coupled to the base volume sensor and configured to indicate when the volume of the reductant solution becomes less than the base volume.04-15-2010
20100126146EXHAUST EMISSION PURIFICATION CONTROLLER OF INTERNAL COMBUSTION ENGINE - An ECU performs PM removal control, in which the bed temperature of a DPF is adjusted to a target bed temperature through addition of unburned fuel to exhaust gas. In the PM removal control, the ECU learns a learned value of a fuel addition amount by which the difference between the bed temperature and the target bed temperature of the DPF is corrected. When the determination in step S05-27-2010
20090145115METHOD FOR REGENERATING PARTICULATE FILTER - A particulate filter can be regenerated more efficiently and in shorter time than before.06-11-2009
20090282815PROCEDURE FOR OPERATING A METERING VALVE AND DEVICE FOR IMPLEMENTING THE PROCEDURE - Procedure for operating an electromagnetically operated metering valve, which is impinged with a metering signal, which determines the metering of a reagent or a precursor of a reagent that has to be injected into the exhaust gas area of a combustion engine, is thereby characterized, in that the reagent pressure is detected at an opened metering valve in a default cycle, which indicates the reagent flow and in that the reagent flow is added over the opening time of the valve for determining the actual metering amount.11-19-2009
20090145116Exhaust System of Internal Combustion Engine - In an exhaust system of an internal combustion engine having a plurality of cylinders, a control valve is disposed downstream of a junction point of one of two exhaust passages of the engine, and a control valve and a catalytic converter are disposed downstream of a junction point of the other of the exhaust passages. The control valves of the two exhaust passages are controlled so that exhaust gas of all of the cylinders mainly passages the catalytic converter of the other exhaust passage during startup of the engine.06-11-2009
20110167804Engine Exhaust System and Method of Operation - An exhaust system for a turbocharged internal combustion engine comprises a first exhaust conduit extending between a first engine cylinder and a turbocharger inlet and is configured to conduct exhaust gas therebetween. A second exhaust conduit extends between a second engine cylinder and an in inlet for an exhaust gas recirculation system and is configured to conduct exhaust therebetween. An exhaust gas bypass extends between, and is in fluid communication with, the first and second exhaust conduits and is configured to divert exhaust gas flowing through the second exhaust gas conduit to the first exhaust gas conduit, and the turbocharger inlet, under conditions of varying exhaust gas recirculation demand of the internal combustion engine.07-14-2011
20090288395METHOD FOR OPERATING A REAGENT METERING VALVE AND APPARATUS FOR CARRYING OUT THE METHOD - The invention relates to a method for operating a metering valve arranged in an exhaust gas region of an internal combustion engine for metering a reagent or a precursor of a reagent, comprising a cooling device to prevent excess temperatures. The invention further relates to a device for carrying out the method. During metering breaks of the regular metering process, a targeted predetermined minimum amount is metered for the cooling of the metering valve, if required.11-26-2009
20090288394Integrated engine and exhaust after treatment system and method of operating same - An engine system includes an integrated engine and aftertreatment control system via an electronic aftertreatment controller that is in communication with the electronic engine controller. An aftertreatment control algorithm is operable to generate an exhaust control signal and a reductant dosing control signal. The dosing control signal is used to control a flow rate of a reductant (e.g. urea) injection rate into the exhaust system for facilitating a reduction reaction with NOx in the exhaust flow at a suitable downstream catalyst location. The exhaust control signal is communicated to the electronic engine controller, which responds by altering engine operation to change some aspect of the engine exhaust. In one specific example, an ammonia slip event precondition is detected by the electronic aftertreatment controller, and an exhaust control signal in the form of an increase NOx request is communicated to the engine controller, which responds by altering engine operation to increase NOx output in the hopes of preempting the expected ammonia slip event prior to its actual occurrence to maintain undesirable emissions low at the tailpipe.11-26-2009
20090277159Selective Catalytic Reduction Using Controlled Catalytic Deactivation - An exhaust treatment control system includes a controller configured to determine a value representative of a NO11-12-2009
20090277160EXHAUST GAS CONTROL APPARATUS AND METHOD FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas control apparatus for an internal combustion engine, including a three-way catalyst, a NO11-12-2009
20090282813Thermal Stability for Exhaust Emissions Treatment Materials - A storage vessel for emission control liquids such as aqueous solutions of urea is equipped with phase change materials that are calibrated to help maintain the liquid within a proper temperature range. Multiple phase change materials having phase transition temperatures of fifty to seventy degrees Celsius and seventy to one hundred degrees Celsius provide staged high-temperature stability for the urea solutions. Phase change materials can be included that also provide low temperature stability by changing from liquids to solids when freezing of the aqueous solution is threatened. Containers of phase change materials are applied to the interior or exterior surfaces of the storage vessel. Alternatively the storage vessel is included within and surrounded by a housing that forms an annular space with the storage vessel, and phase change materials are installed within the annular space. A method for using the storage vessel in an emissions control system also is presented.11-19-2009
20090282814METHOD AND DEVICE FOR CLEANING VALVES - The invention relates to a method and a device for the catalytic combustion of fuel which is metered into the exhaust manifold of an internal combustion engine by an injection valve. Preferably, an oxidation catalyst is positioned in the exhaust manifold of the internal combustion engine. The metered fuel is atomized in an exhaust gas flow by the injection valve. An end of the invention valve facing the direction of the exhaust gas flow in an exhaust pipe is continuously or intermittently heated by a heating device. Alternatively, an end of the injection valve which is thermally decoupled from the injection valve is directly heated by the exhaust gas flow.11-19-2009
20090288397EXHAUST GAS PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU controls urea solution addition quantity of the urea solution addition valve based on ammonia adsorption quantity to the SCR catalyst. The ECU calculates the ammonia adsorption quantity in the SCR catalyst based on time-series data of an ammonia balance between ammonia supply to the SCR catalyst accompanying the urea solution addition of the urea solution addition valve and ammonia consumption in the SCR catalyst. The ECU calculates NOx quantity introduced into the SCR catalyst or a parameter correlated with the NOx quantity and performs initialization of the ammonia adsorption quantity at timing decided based on a result of the calculation.11-26-2009
20090288396EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust emission control device is used for an engine and is applied to an exhaust gas purifying system. The system has an NOx catalyst disposed in an exhaust passage of the engine to promote selective purification of NOx in exhaust gas performed by ammonia, which is a reducing agent for reducing NOx, and a reducing agent adding device for adding the reducing agent to an upstream side of the catalyst in a flow direction of exhaust gas. The device includes a catalyst temperature detecting device for detecting temperature of the catalyst, a reaction ratio calculating device for calculating a reaction ratio, which is a ratio of a reaction amount of ammonia to a reaction amount of NOx in the catalyst, based on the temperature of the catalyst, and an ammonia consumed amount calculating device for calculating a consumed amount of ammonia in the catalyst based on the reaction ratio11-26-2009
20090288393EXHAUST GAS PURIFICATION APPARATUS OF INTERNAL COMBUSTION ENGINE - An adding time a of a fuel addition to an exhaust system is limited to a guard value G or less during an adding period A of a concentrated intermittent fuel of a catalyst recovery control. Accordingly, a one-time fuel adding amount from an adding valve 11-26-2009
20110167805METHOD FOR REDUCING UREA DEPOSITS IN AN AFTERTREATMENT SYSTEM - Various systems and methods are described for controlling a diesel aftertreatment system coupled to an exhaust system of an engine which includes a selective catalytic reduction (SCR) catalyst and a diesel particulate filter (PF). In one example, a threshold amount of urea injected to the SCR catalyst is adjusted based on an amount of soot generated by the engine and the total amount of urea injected to the SCR catalyst is limited by the threshold. For example, when the amount of soot generated by the engine is below a first threshold amount, the threshold amount of urea injection is reduced. When the amount of soot generated by the engine is above a second threshold amount, which is greater than the first threshold amount, the threshold amount of urea injection is increased.07-14-2011
20110167803SYSTEM AND METHOD FOR CONTROLLING EXHAUST GAS TEMPERATURE DURING PARTICULATE MATTER FILTER REGENERATION - An engine control system includes an injection determination module, a correction factor determination module, and a regeneration control module. The injection determination module determines a desired amount of hydrocarbons (HC) to inject into exhaust gas produced by an engine based a flow rate of the exhaust gas. The correction factor determination module determines a correction factor for the desired amount of HC based on engine speed and engine load. The regeneration control module controls injection of an adjusted amount of HC into the exhaust gas during regeneration of a particulate matter filter, wherein the adjusted amount of HC is based on the desired amount of HC and the correction factor.07-14-2011
20090165446Control Method of Exhaust Gas Purification System and Exhaust Gas Purification System - In forced regeneration control of an exhaust gas purification device 07-02-2009
20090165444Method of Controlling Exhaust Gas Purification System and Exhaust Gas Purification System - In an exhaust gas purification system provided with an exhaust gas purification device in an exhaust passage of an internal combustion engine, and at the same time, provided with a reductant supply means for supplying a reductant to the upstream side of this exhaust gas purification device, two or more of the oxygen concentration, the CO concentration, and the HC concentration of the exhaust gas detected by an exhaust gas component concentration detecting means are used as control parameters during the reductant supply control when the reductant is supplied into the exhaust gas flowing into the exhaust gas purification device. With this, the supply period and supply amount of the reductant can be optimized, and a decrease of fuel efficiency deterioration and suppression of deterioration of the quality of the components of the exhaust gas flowing into the atmosphere are attempted.07-02-2009
20090007546Exhaust Gas Purifying Apparatus for an Internal Combustion Engine and a Method for Controlling Same Apparatus - An exhaust gas purifying system for an internal combustion engine includes a first exhaust passage (01-08-2009
20100126147MOTOR VEHICLE AND METHOD FOR OPERATING A MOTOR VEHICLE HAVING AN EXHAUST GAS HEATING DEVICE - A method for operating a motor vehicle which has a drive and an exhaust system with at least one controllable heating device to be placed in contact with exhaust gas, includes at least the following steps: 05-27-2010
20100126144Systems And Methods For Estimating Particulate Load In A Particulate Filter - A method for regenerating a particulate filter may comprise determining a temperature, a flow rate, and a total pressure drop of an exhaust gas flowing through a particulate filter, and determining a corrected soot layer permeability. The method may further comprise calculating an estimated soot load of the particulate filter based on the total pressure drop and the corrected soot layer permeability, and causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value.05-27-2010
20100281855MODEL BASED METHOD FOR SELECTIVE CATALYST REDUCER UREA DOSING STRATEGY - A method to control NO11-11-2010
20110197569ON-VEHICLE NITROGEN OXIDE AFTERTREATMENT SYSTEM - An emissions system for reducing nitrogen oxides in engine exhaust includes an emissions catalyst having an inlet adapted to receive an exhaust from the engine. A fuel tank is adapted to provide fuel for combustion within the engine. A first injector is operable to inject fuel into the exhaust upstream of the catalyst. A second injector is operable to inject supplemental reductant from a supplemental reductant tank into the exhaust upstream of the catalyst. A controller is operable to control the first and second injectors and vary the supply of fuel and supplemental reductant into the exhaust to reduce nitrogen oxides within the exhaust.08-18-2011
20080295497Device for the distribution of flowable additives in exhaust gas systems - A device is provided for the distribution of flowable additives in exhaust gas systems of an internal combustion engine, in particular for the distribution of a water/urea mixture in an exhaust gas system of a diesel engine, having an injection device in particular opening into the exhaust tract before a so-called SRC catalytic converter, with a swirl generation device being provided for the improvement of the mixing of the exhaust gas with the additive in the introduction region of the additive in the exhaust tract.12-04-2008
20110197568SYSTEM FOR DISABLING DIESEL PARTICULATE FILTER REGENERATION DURING ELECTRIC OPERATION - A regeneration disable control system (08-18-2011
20080236146Method And Apparatus For Regenerating NOx Adsorbers - In a method of regenerating a NOx adsorber, the NOx adsorber is used to treat exhaust gases created during the combustion of gaseous fuels in general. Methane is introduced into a reformer or exhaust line in which hydrogen generated during reforming is used to regenerate the NOx absorber.10-02-2008
20100101217EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the invention is to recover the capability of an exhaust gas purification apparatus provided in an exhaust passage of an internal combustion engine with improved reliability. According to the invention there are provided recovery control execution unit for executing a recovery control in which the temperature of the exhaust gas purification apparatus is raised by supply of reducing agent to a precatalyst to thereby recover the capability of the exhaust gas purification apparatus and prohibition range setting unit for setting a recovery control prohibition range that is an operation range of the internal combustion engine in which execution of the recovery control by the recovery control execution unit is prohibited. The higher the degree of deterioration of the precatalyst is, the higher the maximum values of the engine torque and the engine revolution number in the recovery control prohibition range are set to be.04-29-2010
20090266057EXHAUST PURIFICATION DEVICE OF AN INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NOX selective reducing catalyst is arranged in the engine exhaust passage, and an NOX storage catalyst able to store NOX contained in the exhaust gas is arranged at the upstream of the NOX selective reducing catalyst. The NOX storage catalyst is fed with mist fuel, and the NOX stored in the NOX storage catalyst and the fed fuel are used to produce an intermediate product comprising bonded molecules comprised of NH2 and a hydrocarbon molecule more than an equivalent ratio with respect to one NOX molecule. These intermediate products are adsorbed at the NOX selective reducing catalyst, whereby the adsorbed intermediate product reduces the NOX in the exhaust gas.10-29-2009
20090266056EXHAUST EMISSION CONTROL DEVICE - Fuel added to exhaust gas is uniformly afforded to catalytic surfaces of a NO10-29-2009
20090165445Exhaust Gas Purification Method and Exhaust Gas Purification System - In an exhaust gas purification system (07-02-2009
20100005787EXHAUST GAS PURIFICATION APPARATUS FOR ENGINE - There is provided an exhaust gas purification apparatus for an engine capable of effectively removing NOx in exhaust gas even when the temperature of exhaust gas is relatively low. The exhaust gas purification apparatus includes a selective reduction catalyst provided in an exhaust pipe, a liquid injection nozzle provided on the upstream side of the selective reduction catalyst, a liquid injecting means capable of injecting a urea-based liquid via the liquid injection nozzle, a controller, and a mixer. The apparatus further includes an ammonia purification catalyst provided on the downstream side of the selective reduction catalyst, a diesel particulate filter provided on the upstream side of the nozzle, an oxidation catalyst provided on the upstream side of the diesel particulate filter, and a temperature sensor for detecting the temperature of the selective reduction catalyst. A fuel injection device is configured so as to be capable of injecting fuel into a cylinder after the top dead center of piston, and when the temperature sensor detects that the selective reduction catalyst has a temperature not higher than a predetermined temperature, the controller controls the fuel injection device so that fuel is injected into the cylinder after the top dead center of piston.01-14-2010
20080276599EXHAUST AIR PURIFIER FOR INTERNAL COMBUSTION ENGINE - There is provided an exhaust air purifier for an internal combustion engine that reduces the frequency of estimation of an amount of accumulated particulate matter, and hence energy consumption involved in the estimation of the amount. Based on a difference ΔP11-13-2008
20080276598Approach for Detecting Reductant Availability and Make-Up - A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system, comprising coordinating a physical condition associated with a reductant storage device, wherein the physical condition may correspond to a measure of liquid stored in the reductant storage device, with a characteristic of a fluid stored in the reductant storage device to determine the availability and make-up of the stored fluid, wherein at least one of the physical condition and the property of the stored fluid is determined by a plurality of sensors; and adjusting engine operation based on said coordinating the condition associated with the reductant storage device with the property of the stored fluid.11-13-2008
20080282680Device for Treating Nitrogen Oxides of Motor Vehicle Exhaust Gases - A propulsion system, for example for a motor vehicle, that includes an internal combustion engine, a catalyst for reducing nitrogen oxides NOx contained in the exhaust faces of the internal combustion engine, a fuel injector arranged upstream of the catalyst, and a mechanism that determines quantity of the nitrogen oxides NOx received from the internal combustion engine. The propulsion system also includes a mechanism that determines a fuel quantity required for attaining a proportion lower or substantially equal to a stoichiometric proportion with respect to the nitrogen oxide NOx quantity, and a mechanism that triggers injection of the required quantity when the ratio therebetween and the nitrogen oxide NOx quantity is less than the triggering threshold.11-20-2008
20080282681EXHAUST EMISSION PURIFYING APPARATUS FOR ENGINE - An exhaust emission purifying apparatus for an engine, which is provided with: an electric pump sucking and supplying a liquid reducing agent by pumping out of a reducing agent tank; a flow control valve controlling flow rate of the liquid reducing agent; and an injection nozzle injection-supplying the liquid reducing agent with the controlled flow rate, to an exhaust emission upstream of NOx reduction catalytic converter. At the engine starting, a highly pressurized air is urged to reversely flow to a reducing agent supply system upstream of the flow control valve. Then it is determined whether or not the reducing agent supply system brings about clogging based on a pressure change produced by the reverse flow. When a number of frequency at which it is consecutively determined as occurrence of clogging reaches a predetermined number or more, it is determined that the clogging is serious, which is unable to be readily mended.11-20-2008
20080282678Electrically heated particulate filter restart strategy - A control system that controls regeneration of a particulate filter is provided. The system generally includes a propagation module that estimates a propagation status of combustion of particulate matter in the particulate filter. A regeneration module controls current to the particulate filter to re-initiate regeneration based on the propagation status.11-20-2008
20080282676COMPACT SYSTEM FOR ADDING HYDROCARBONS TO THE EXHAUST OF AN INTERNAL COMBUSTION ENGINE - A compact system for introducing hydrocarbons in the form of engine fuel into the bearing housing for a turbocharger adjacent the turbine wheel shaft. The hydrocarbons are directed outward by centrifugal force and are vaporized by the heat of the impeller. As a result the hydrocarbons are available substantially immediately after the turbine to interact with a catalyst to increase the temperature of the exhaust stream for regeneration of a diesel particulate filter.11-20-2008
20080307773Exhaust Gas Purification Apparatus Regeneration System of Internal Combustion Engine - There is provided a technology that enables, in an exhaust gas purification apparatus regeneration system of an internal combustion engine, to prevent the remaining fuel quantity from decreasing to an unduly small quantity during execution of regeneration control for regenerating the exhaust gas purification ability of the exhaust gas purification apparatus by supplying fuel to the exhaust gas purification apparatus. The system of the invention has command device capable of being operated by a driver for sending a regeneration execution command to cause regeneration control execution device to execute the regeneration control and notification device for notifying the driver to prompt the driver to send the regeneration execution command to the regeneration control execution device through the command device. Time of notification by said notification device is controlled so that it is prevented that the regeneration execution command is sent to said regeneration control execution device by said command device while notification is given to the driver by said notification device and the quantity of remaining fuel becomes equal to or lower than a specified remaining quantity during execution of the regeneration control executed in response to the regeneration execution command.12-18-2008
20090031709Exhaust Purification Device of Compression Ignition Type Internal Combustion Engine - An internal combustion engine in which an SO02-05-2009
20080271438Engine-Driven Vehicle with Exhaust Emission Control - A method and an arrangement are provided for maintaining the oxidation of NO to NO2 in an oxidation catalytic converter arranged in a vehicle, the vehicle including an internal combustion engine which in operation emits exhaust gases to an exhaust gas after treatment system including the oxidation catalytic converter. A predetermined quantity of hydrocarbon is delivered to the exhaust gas aftertreatment system or the engine over at least one predetermined time interval for the purpose of maintaining the working temperature or regenerating an exhaust gas aftertreatment unit. The quantity of hydrocarbon is delivered to the exhaust gas aftertreatment system or to the engine through an injection with at least one predetermined fragmentation frequency and an injection period in order to maintain an NO2 production in the exhaust gas aftertreatment system that prevailed immediately prior to said time interval for the hydrocarbon injection.11-06-2008
20080264042METHOD AND APPARATUS FOR A NON-CATALYTIC NOx REDUCTION - A method of reducing NOx in exhaust gases generated by an internal combustion engine includes advancing the exhaust gases along an exhaust path to a selective catalytic reduction (SCR) catalyst positioned downstream from the internal combustion engine. The method further includes activating a heat source if the exhaust gases are below a predetermined temperature, such that the exhaust gases along a segment of the exhaust path are heated to a temperature of 700-1000° C. The method further includes injecting a reductant into the segment of the exhaust path upstream of the SCR catalyst to react in the segment with NOx in the exhaust gases. The method further includes deactivating the heat source if the temperature of the exhaust gases at the catalyst rises above the first predetermined temperature. An emission abatement assembly is also disclosed.10-30-2008
20100139251METHOD AND APPARATUS FOR CONTROLLING EXHAUST EMISSIONS IN A SPARK-IGNITION DIRECT-INJECTION ENGINE - Exhaust emissions from a spark-ignition direct-injection engine connected to an oxidation catalytic device and a selective catalyst reduction device having a capacity to store ammonia reductant are controlled. The engine operates in a first combustion mode to generate ammonia reductant, stored on the second aftertreatment device. The engine operates lean of stoichiometry and nitrides of oxygen in the exhaust gas feedstream are reduced on the second aftertreatment device.06-10-2010
20100139252METHOD AND DEVICE FOR PURGING AN INJECTOR IN A FUEL INJECTOR SYSTEM OF USE IN THE REGENERATION OF A PARTICULATE FILTER - A method and a device for purging an injector in a fuel injector system of use in regeneration of a particle filter. The aging of fuel is determined and compared with a fuel aging threshold value, and a purge request is activated if the threshold value is exceeded. On activating the purge request the satisfaction of the conditions of purge activation are verified and, if satisfied, the purge is activated. The purge is continued while the conditions are satisfied until the quantity of fuel purged reaches a quantity of fuel to be purged.06-10-2010
20090188240APPARATUS FOR PURIFICATION OF EXHAUST GAS AND METHOD FOR PURIFICATION OF EXHAUST GAS USING THE SAME - An apparatus for purification of exhaust gas comprises: an exhaust gas pipe (07-30-2009
20090019837EXHAUST PURIFICATION DEVICE FOR ENGINE - An exhaust purification device for an engine comprises a catalytic device for purifying exhaust by using an additive, a deflecting device for allowing the exhaust to flow through and causing the exhaust to be agitated, upstream of the catalytic device, an additive injection device for injecting an additive, downstream of the deflecting device, a temperature detection device for detecting exhaust temperature, downstream of the deflecting device, and a control unit for controlling the additive injection device on the basis of the exhaust temperature detected by the temperature detection device. The temperature detection device has a temperature detection part located within a region where the exhaust having passed through the deflecting device has increased velocity.01-22-2009
20100139253System for Purifying Exhaust Gas - A system for purifying an exhaust gas may include a catalyzed particulate filter trapping particulate matters contained in the exhaust gas, a diesel oxidation catalyst oxidizing carbon monoxide and hydrocarbon in the exhaust gas, a selective catalyst reduction apparatus reducing nitrogen oxide contained in the exhaust gas, a dosing module located upstream of the selective catalyst reduction apparatus and dosing a reducing agent into the exhaust gas, and a control portion controlling an operation of an engine, wherein the catalyzed particulate filter, the diesel oxidation catalyst, the selective catalyst reduction apparatus, and the dosing module are mounted on an exhaust pipe, and the selective catalyst reduction apparatus is mounted downstream of the catalyzed particulate filter and the diesel oxidation catalyst, and wherein the control portion controls flow of the exhaust gas and the engine to raise an exhaust gas temperature if a heating mode enter condition is satisfied.06-10-2010
20100139254METHOD AND ARRANGEMENT FOR MONITORING OF AN INJECTOR - A method and a system are provided for monitoring of the functionality of an After Treatment Injector (ATI) for injection of a fluid in an engine exhaust gas system upstream of an exhaust gas treatment unit. The monitoring is performed by using a pressure sensor which detects the pressure of the fluid delivered to the ATI for a specific condition or injection cycle. The pressure sensor is located downstream of a flow regulator and upstream of the ATI in a conduit for supplying of a substance from a container to the ATI. An ECU is programmed to perform a predetermined sequence of opening and closing commands for the flow regulator and the ATI, furthermore perform a frequency analysis of the measured pressure value in order to monitor the functionality of the flow regulator, the ATI and the pressure sensor. The method and system are adapted to be used in connection with an On Board Diagnosis (OBD) system.06-10-2010
20090178391METHOD AND APPARATUS FOR OPERATING AN EMISSION ABATEMENT ASSEMBLY - According to one aspect of the disclosure, a method of operating an emission abatement system having a selective catalytic reduction (SCR) catalyst includes supplying fuel to a fuel-fired burner positioned upstream of the SCR catalyst to heat exhaust gas being advanced to the SCR catalyst. The method further includes determining a flow rate of fuel being supplied to the burner. The method further includes predicting the amount of fuel to be further supplied to the burner based upon the determined fuel flow rate. The method further includes supplying the predicted amount of fuel to the burner.07-16-2009
20090183494Control Method of Exhaust Gas Purification System and Exhaust Gas Purification System - In forced regeneration control of an exhaust gas purification device 07-23-2009
20090025371Control of an Exhaust Gas Aftertreatment Device in a Hybrid Vehicle - The present invention involves a method for maintaining temperature in an exhaust gas treatment device for an internal combustion engine in a hybrid vehicle. The engine has a crankshaft and at least one cylinder. The hybrid vehicle has a fuel storage device and a fuel supply device. An exhaust gas treatment device is located downstream of the cylinder. The method comprises, in an engine off mode, pumping air to the exhaust gas aftertreatment device controlling the fuel supply device so that fuel is allowed to the exhaust gas aftertreatment device. Air flow to the exhaust gas aftertreatment device can be controlled by a throttle in an inlet duct to the engine and/or the fuel supply device to control the combustion and air-fuel ratio in the exhaust gas treatment device.01-29-2009
20090025370EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An auxiliary agent supply means (01-29-2009
20090183495Method of Purifying Exhaust Gas and Exhaust Gas Purification System - Even in the case of driving for a long time in the low rotation speed driving condition in which the exhaust flow rate is small and an estimation of the PM accumulated amount due to the pressure difference between the front and the back sides of a filter is difficult, the forced regeneration time can be accurately judged, the deterioration of fuel efficiency that is caused by excessive PM trapping can be avoided, and at the same time, thermal runaway that is generated by the excessive accumulated amount of PM and melting damage of the DPF due to this thermal runaway can be prevented. In the exhaust gas purification system 07-23-2009
20090183493Exhaust Purification System of Internal Combustion Engine - When performing temperature elevation control at a first exhaust purification device 07-23-2009
20090139214Exhaust Treatment System Having A Diverter Valve - An exhaust treatment system is provided having a tank configured to store a supply of reductant. The system also has a heat source configured to heat the reductant and a diverter valve configured to regulate the heat source.06-04-2009
20090007545Exhaust Purifier for Internal Combustion Engine - An addition valve is provided upstream of an exhaust gas purifying catalyst (NOx catalyst) in an exhaust pipe and in the vicinity of a water jacket in a cylinder head, in addition to a fuel injection valve injecting fuel for combustion in a combustion chamber. The addition valve injects a reducing agent in an addition amount in accordance with an operation state of an engine. Using an engine coolant temperature correlated to a temperature of the addition valve, a target addition interval of the addition valve is made shorter with increase in the engine coolant temperature, so that the addition amount is increased (step 01-08-2009
20090211235EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine having a particulate filter provided in an exhaust system of the engine. Regeneration control is performed of burning particulates accumulated in the particulate filter. An oxygen concentration in exhaust gases flowing into the particulate filter is detected, and a flow rate of oxygen flowing into the particulate filter is calculated according to the detected oxygen concentration. An inflowing oxygen amount is calculated by integrating the oxygen flow rate when performing regeneration control. It is determined that an abnormality has occurred if the inflowing oxygen amount at a time when regeneration control ends is equal to or less than a predetermined amount.08-27-2009
20100146941METHOD AND ARRANGEMENT FOR MONITORING OF INJECTOR - A method and a system are provided for monitoring of the functionality of an After Treatment Injector (ATI) for injection of a fluid in an engine exhaust gas system upstream of an exhaust gas treatment unit. The monitoring is performed by using a pressure sensor which detects the pressure of the fluid delivered to the ATI for a specific condition or injection cycle. The pressure sensor is located downstream of a flow regulator and upstream of the ATI in a conduit for supplying of a substance from a container to the ATI. An ECU is programmed to perform a predetermined sequence of opening and closing commands for the flow regulator and the ATI in order to monitor the functionality of the flow regulator, the ATI and the pressure sensor. The method and system can be used in connection with an On Board Diagnosis (OBD) system.06-17-2010
20100146939INNER FLAME BURNER FOR REGENERATION OF DIESEL PARTICULATE FILTER - Provided is a burner for regenerating a diesel engine particulate filter. The burner includes: a combustion chamber for receiving exhaust gas from a diesel engine; a carburetor for gasifying liquid fuel; a mixed gas supplying unit for mixing the gasified fuel with an external air, and supplying the mixed gaseous fuel to the combustion chamber; a mixed gas storing chamber disposed in the combustion chamber for receiving the mixed gaseous fuel and instantly storing the received mixed gaseous fuel; an inner flame combustor made of porous material for injecting the mixed gaseous fuel toward the inside of the inner flame combustor, and disposed in the combustion chamber to allow an exhaust gas to flow through the inner flame combustor; an igniter for igniting the mixed gaseous fuel; and a flame sensor for sensing the flame on the inner flame combustor.06-17-2010
20110219752TARGETED PARTICULAR MATTER FILTER REGENERATION SYSTEM - A regeneration system includes a particulate matter (PM) filter. The PM filter has an upstream end that receives an exhaust gas from an engine. An air pump circuit directs ambient air to a first exhaust conduit upstream from the PM filter. A control module determines a current soot loading level of the PM filter. The control module also at least one of operates the engine in a rich mode and activates an air pump of the air pump circuit when the current soot loading level is greater than a predetermined soot loading level.09-15-2011
20080264043EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device has an additive valve and a control unit to decrease nitrogen oxides contained in an exhaust gas by means of a reducing agent. The control unit sets a valve opening period of time and a valve closing period of time alternately elapsing in a repetition cycle. The control unit controls the valve to discharge the agent into the exhaust gas during each valve opening period and to stop discharging the agent during each valve closing period. The control unit sets the valve opening period to be shortened as a flow rate of the exhaust gas is lowered, so that a penetration force of the reducing agent is appropriately set. The control unit sets the repetition cycle at a value depending on the flow rate of the nitrogen oxides to sufficiently deoxidize the nitrogen oxides by means of the agent.10-30-2008
20080264041Method For Introducing A Reagent Medium Into An Exhaust Gas Conduit Of An Internal Combustion Engine, And Apparatus For Carrying Out The Method - A method for introducing a reagent medium into an exhaust gas conduit of an internal combustion engine (10-30-2008
20090049827EMISSION CONTROL SYSTEM IMPLEMENTING REDUCTION AGENT INJECTION - An emissions control system is disclosed. The emissions control system may have a power source that creates a flow of exhaust, an SCR catalyst situated to receive the flow of exhaust, and an injector configured to inject a reduction agent into the flow of exhaust in the presence of the SCR catalyst. The emissions control system may further have a controller configured to calculate a spatially dependent surface coverage of the reduction agent on the SCR catalyst and substantially stop injection of the reduction agent when the spatially dependent surface coverage of the reduction agent exceeds a maximum surface coverage of the reduction agent at one or more spatial locations.02-26-2009
20090049826Exhaust Purification System of Internal Combustion Engine - An NOx adsorbent is arranged in an exhaust passage of an internal combustion engine, a fuel addition valve (02-26-2009
20090100824Urea Supply System for a Waste Gas Cleaning Catalyst and Heating Insert Suitable Therefor - The invention relates to a urea supply system for a waste gas cleaning catalyst of an internal combustion engine, comprising a urea tank for the receiving of urea solution, a connecting line that connects the urea tank with a waste gas cleaning catalyst, a pump in order to pump urea solution via the connecting line from the urea tank to the catalyst, and a heating insert for the defrosting of frozen urea solution. According to the invention it is provided that the return line is configured and arranged in such a manner that, during operation, because of the urea solution discharged from the return line there is prevented the forming of an air gap between the heating insert and the frozen urea solution. The invention relates also to a heating insert for such a urea supply system.04-23-2009
20090100825EXHAUST PURIFICATION APPARATUS FOR ENGINE - An exhaust purification apparatus comprises an ammonia selective reduction-type NOx catalyst that selectively reduces NOx within exhaust gas by using ammonia as a reducing agent, a urea-water supply device that supplies urea-water into the exhaust gas existing upstream of the ammonia selective reduction-type NOx catalyst, and a control unit. The control unit controls the urea-water supply device so that the urea-water is intermittently supplied according to predetermined supply duration time and predetermined supply suspension time when the urea-water is supplied from the urea-water supply device for the purpose of providing ammonia to the ammonia selective reduction-type NOx catalyst.04-23-2009
20090107117Diesel Engine Aftertreatment Control Operation with Waste Heat Recovery - A diesel engine exhaust gas aftertreatment system is described. The system may comprise a heat transfer device comprising a first side and a second side; a heater downstream of the first side of the heat transfer device, a filter downstream of the heater; and, an exhaust path downstream of the filter leading to the second side of the heat transfer device, wherein the exhaust path is isolated from an external surface of the filter to inhibit heat transfer from the heated exhaust gas exiting the filter to the external surface of the filter.04-30-2009
20110219751FUEL DELIVERY SYSTEM FOR SELECTIVELY PROVIDING FUEL TO VARIOUS ENGINE COMPONENTS - A system for providing fuel to an engine fuel delivery system and to an exhaust aftertreatment system associated with an engine. The system includes a fuel source, a pump being operable in a first state to pump fuel from the fuel source to the engine fuel delivery system, and the pump being operable in a second state to pump fuel from the fuel source to the exhaust aftertreatment system, wherein the first state corresponds to a first rotational direction of the pump and the second state corresponds to a second rotational direction of the pump.09-15-2011
20090205321Exhaust system implementing selective catalyst flow control - An exhaust system for use with an engine is disclosed. The exhaust system may have a first treatment device configured to receive a flow of exhaust from the engine and convert a first constituent of the exhaust to a second constituent. The exhaust system may also have a second treatment device located downstream of the first treatment device and configured to reduce the first constituent and the second constituent. The exhaust system may further have a flow regulator configured to selectively vary a rate of exhaust passing through the first treatment device, and a controller configured to operate the flow regulator such that a desired amount of the first constituent and the second constituent is received by the second treatment device.08-20-2009
20090205322Exhaust Gas Aftertreatment System and Exhaust Gas Cleaning Method - An exhaust gas aftertreatment system, and a method for exhaust gas purification, has a first oxidation catalyst device, a NOx catalyst device for removing nitrogen from the exhaust gas, a device for actively increasing an exhaust gas temperature with at least one second oxidation catalyst device, and a device for removing particles. The devices are arranged one behind the other in the flow direction of the exhaust gas of an internal combustion engine, so that the exhaust gas flows through them. A respective operating temperature of the NOx catalyst device and of the device for removing particles can be set independently of an exhaust gas temperature at an outlet of the internal combustion engine.08-20-2009
20090205323Exhaust Gas Purification System For Internal Combustion Engine - An object of the invention is to provide a technique for improving the efficiency of performance regeneration process that is executed on NOx storage reduction catalysts provided in a plurality of branch passages branching from the exhaust passage and reduce emissions of NOx from an internal combustion engine to the atmosphere. When the quantity of NOx discharged from an internal combustion engine and flowing into an exhaust pipe is smaller than a predetermined quantity, fuel serving as reducing agent is added through a fuel addition valve while torque change moderating process is executed (from T08-20-2009
20090211236SYSTEM FOR CONTROLLING THE TEMPERATURE OF A FLUID ADDITIVE IN A MOTOR VEHICLE - The present invention relates to a system for controlling the temperature of a fluid additive for an exhaust system of an internal combustion engine. The system has means for exchanging heat between the additive and a refrigerant circuit of a refrigerant system. The fluid additive is preferably a NO08-27-2009
20090217646System for controlling exhaust aftertreatment - In one aspect, the present disclosure is directed to a method for treating exhaust from an engine. The method may comprise generating a first signal indicative of an engine load and generating a second signal indicative of a pollutant level. The method may further comprise recirculating exhaust based on the first signal and injecting a reductant based on the first signal and the second signal.09-03-2009
20090249766METHOD AND SYSTEM FOR STORING AN ADDITIVE AND INJECTING IT INTO THE EXHAUST GASES OF AN ENGINE - A method for storing an additive and injecting the additive into exhaust gases of an engine supplied with fuel from a fuel tank and returning unused excess hot fuel to the tank via a return line. The method heats the additive using a section of the return line when the additive temperature is below or equal to a threshold value, and short circuits the heating section when the additive temperature exceeds the threshold value. A system for implementing such a method includes an additive heating section including a section of the return line; a temperature sensor; and a device allowing the heating section to be short circuited when the temperature measured by the sensor exceeds the threshold value.10-08-2009
20090249767Exhaust Purification Device of Compression Ignition Type Internal Combustion Engine - An internal combustion engine wherein an SO10-08-2009
20090241516SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN A DIESEL ENGINE EXHAUST LINE - A system for regenerating a catalytic particulate filter located in a diesel engine exhaust line, including an electronic control unit, a controlled fuel injector arranged upstream of the catalytic particulate filer and supplied with fuel by a controlled pump, and a sensor for measuring the fuel supply pressure of the injector. The system further detects a defect in the activating state of the pump based on the fuel supply pressure of the injector.10-01-2009
20090000279ADDITION-AMOUNT CONTROLLER FOR EXHAUST GAS PURIFYING AGENT AND EXHAUST EMISSION CONTROL SYSTEM - In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system of an engine, one mode is executed based on satisfaction of an execution condition for each mode, from among a plurality of control modes. The control modes includes a purification control mode in which an addition amount of NH01-01-2009
20090255233Exhaust purification device and exhaust purification method of internal combustion engine10-15-2009
20090260350ENHANCED AFTERTREATMENT APPARATUS REGENERATION USING SPATIALLY CONTROLLED HYDROGEN-RICH GAS - Regeneration system in which a hydrogen-rich gas from an onboard reformer flows into an aftertreatment unit in a direction opposite to the flow of engine exhaust to regenerate the unit. The aftertreatment unit is segmented with independent regeneration capability for each segment. Regeneration is performed with hydrogen-rich gas produced by an onboard reformer. A hydrogen-rich gas switchbox is used to direct the flow of the reformate to the segment of the aftertreatment unit that is undergoing regeneration.10-22-2009
20100037597EXHAUST EMISSION CONTROL SYSTEM FOR LEAN ENGINES AND METHOD FOR OPERATING THE SYSTEM - An emission control system for the cleaning of the exhaust gases of a lean burn engine with two or more cylinders comprises a first exhaust leg for the exhaust gases of a first group of cylinders and a second exhaust leg for the exhaust gases of a second group of cylinders. A nitrogen oxide storage catalyst is arranged in each exhaust leg. The two exhaust legs are combined downstream of the storage catalysts at a confluence to form a common exhaust leg. The common exhaust leg contains an SCR catalyst. The first and second groups of cylinders are each supplied alternately in periodic intervals with lean and rich air/fuel mixtures. Lean or rich exhaust gases are thus obtained in the combustion in the cylinders and released into the corresponding exhaust legs. Lean and rich exhaust gases are adjusted with respect to one another so as to result in a lean exhaust gas after the combination of the exhaust gases in the common exhaust leg. The regeneration of the storage catalysts may result in the formation of ammonia, which is stored by the SCR catalyst and reacted with nitrogen oxides which pass through the storage catalysts in an unwanted manner during the storage phases.02-18-2010
20080314028Method 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, 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.12-25-2008
20090249769THERMAL CONVERTER DEVICES, SYSTEMS AND CONTROL METHODS - A system is provided for reducing exhaust emissions. The system can comprise a series of chambers, an injector head, and a controller. The controller can maintain desired temperature zones and chemical environments inside the series of chambers, and the chambers and structures inside the system 10-08-2009
20090133387PARTICULATE MATTER TRAP FILTER REGENERATION TEMPERATURE CONTROL FOR INTERNAL COMBUSTION ENGINE - An internal combustion engine (05-28-2009
20100186386EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE AND METHOD OF CONTROLLING THE SAME - A small oxidation catalyst and a fuel supply valve are arranged in an engine exhaust passage. The small oxidation catalyst has a cross-sectional area smaller than a cross-sectional area of the engine exhaust passage, and portion of exhaust gas flowing in the engine exhaust passage flows through the small oxidation catalyst. The fuel supply valve supplies fuel to the small oxidation catalyst. Fuel is intermittently supplied from the fuel supply valve to the small oxidation catalyst to intermittently generate flames downstream of the small oxidation catalyst.07-29-2010
20100154389PROCEDURE FOR REGENERATING AN EXHAUST GAS AFTER TREATMENT SYSTEM - Procedure for regenerating an exhaust gas after treatment system, especially a particle filter, of a combustion engine that is arranged in a motor vehicle, with regeneration cycles that are controlled by a control unit,whereby the control unit is provided with information data regarding the route and whereby the regeneration cycles are controlled with regard to the information data, is thereby characterized, in that the information data that regards the route contains driver specific information data.06-24-2010
20130213017Annular Heat Exchanger - An annular heat exchanger for cooling hot gases comprises an inner shell, an intermediate shell and an outer shell. Where the heat exchanger is integrated with a catalytic converter for treatment of hot exhaust gases in a motor vehicle, the inner shell contains a catalyst for treatment of the exhaust gases. Inner and outer gas flow passages are provided between the shells, and a coolant flow passage is provided, either on the outer surface of the outer shell, or inbetween the intermediate and outer shells. The exhaust gases change direction twice as they pass through the heat exchanger, and the annular structure of the heat exchanger provides a large surface area, and a large flow section, relative to volume, and thereby provides effective heat exchange without significantly increasing space requirements.08-22-2013
20100186384INTEGRATED EXHAUST AND ELECTRICALLY HEATED PARTICULATE FILTER REGENERATION SYSTEMS - A system includes a particulate matter (PM) filter that includes multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post-fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module is configured to operate in a first mode that includes activating the electrical heater to heat exhaust of the engine. The control module is also configured to operate in a second mode that includes activating the post-injection system to heat the exhaust. The control module selectively operates in at least one of the first mode and the second mode.07-29-2010
20100257846Exhaust System with a NOx Sensor - Various systems and methods are described for controlling a NOx sensor coupled to an engine exhaust system in a motor vehicle. One example method comprises generating an offset of the sensor based on an ambient air flow drawn into the exhaust system, the ambient air flow having circumvented cylinders of the engine, and adjusting an output of the sensor based on the generated offset.10-14-2010
20100192547EXHAUST EMISSION CONTROL DEVICE - The invention has an object of exerting favorable NO08-05-2010
20100186383STORED REDUCTANT STATE FOR STARTUP - An engine exhaust aftertreatment system including an catalyst-based device configured to reduce an amount of NOx in exhaust gases produced by an engine using reductant stored in the catalyst-based device. The system includes a controller configured to determine a starting quantity of stored reductant in the catalyst-based device at the start of the engine. The starting quantity is based on a shutdown quantity of stored reductant in the catalyst-based device determined at the shutdown of the engine.07-29-2010
20100186382Emissions system mounting device with reductant mixing - An emissions control system is disclosed. The emissions control system may have a first exhaust treatment device. The emissions control system may also have an end cap defining a mixing chamber connected to an end of the first exhaust treatment device. The mixing chamber may be configured to promote mixing between a flow of exhaust received from the first exhaust treatment device and a reductant. The emissions control system may further have a second exhaust treatment device configured to receive the flow of exhaust and reductant after it passes through the mixing chamber.07-29-2010
20080209890Method of purging fluid injector by heating - A fluid injector for use in an exhaust treatment system is disclosed. The fluid injector may have a nozzle portion, a heater associated with the nozzle portion, and a controller in communication with the heater. The controller may be configured to recognize a condition triggering a purge event of the fluid injector. The controller may also be configured to activate the heater to purge the fluid injector in response to the recognized condition.09-04-2008
20080209889Internal Combustion Engine Featuring Exhaust Gas Aftertreatment and Method For the Operation Thereof - An internal combustion engine with exhaust gas aftertreatment and method for the operation thereof are provided. The internal combustion engine includes at least one first and one second group of one or more combustion chambers, in which the one or more combustion chambers of the first group may be supplied with fuel independently of the one or more combustion chambers of the second group, an exhaust system having a first exhaust branch line which leads away from the first combustion chamber group, and a second exhaust branch line which leads away from the second combustion chamber group, and at least one exhaust gas aftertreatment unit which, at the inlet side, is connected to the first and second exhaust branch lines. Also, a bypass line, which leads away from the second exhaust branch line, for bypassing the exhaust gas aftertreatment unit is provided.09-04-2008
20120137661METHOD FOR PREDICTING REGENERATION OF DENOX CATALYST AND EXHAUST SYSTEM USING THE SAME - A method for predicting regeneration may include calculating total mass flow of reducing agent, calculating mass flow of the reducing agent used in nitrate reduction reaction, mass flow of the reducing agent used in NO2 reduction reaction, and mass flow of the reducing agent which is simply oxidized by using the total mass flow of the reducing agent, calculating mass flow of released NO2 and mass flow of reduced NO2 by using the mass flow of the reducing agent used in the nitrate reduction reaction and the mass flow of the reducing agent used in the NO2 reduction reaction, calculating mass flow of NO2 slipped from DeNOx catalyst, and calculating mass of NO2 and mass of NOx remaining at the DeNOx catalyst after regeneration based on the mass flow of the released NO2, the mass flow of the reduced NO2, and the mass flow of the slipped NO2.06-07-2012
20090077950Exhaust Purification System For Internal Combustion Engine - The exhaust purification system for an internal combustion engine according to the present invention includes fuel supply means for supplying fuel to the NOx storage-reduction catalyst from the upstream side thereof, and SOx poisoning recovery control executing means that uses the fuel supply means to supply fuel to the NOx storage-reduction catalyst thereby executing the SOx poisoning recovery control at a predetermined interval during operation of the internal combustion engine. In addition, according to the present invention, the execution of the SOx poisoning recovery control by the SOx poisoning recovery control executing means is prohibited during a predetermined period DELTA Qfen2 starting from a point in time that the operation of the internal combustion engine is initially started. The predetermined period DELTA Qfen2 is longer than a predetermined interval DELTA Qfen1.03-26-2009
20090077953Device and method of controlling exhaust gas sensor temperature, and recording medium for exhaust gas sensor temperature control program - A control input (DUT) for controlling a heater (03-26-2009
20090077951Method and Device for Operating an Internal Combustion Engine - An internal combustion engine has a NOX storage catalyst. A storage capacity (NOX_STC) of the NOX storage catalyst is determined for the purpose of operating the internal combustion engine. The temperature (TEMP) of the NOX storage catalyst is increased if the storage capacity (NOX_STC) is less than a predefined threshold value.03-26-2009
20100192546Method and Apparatus for Controlling Regeneration of a Particulate Filter - A method of operating an emission abatement assembly includes igniting a fuel-fired burner of the emission abatement assembly to combust soot trapped in a particulate filter of the emission abatement assembly. The method also includes detecting an engine exhaust intake failure of the emission abatement assembly. Furthermore, the method includes extinguishing the fuel-fired burner in response to detecting the engine exhaust intake failure of the emission abatement assembly. An emission abatement system is also disclosed.08-05-2010
20100223913METHOD FOR THREE ZONE DIESEL OXIDATION CATALYST LIGHT OFF CONTROL SYSTEM - A method to regenerate a diesel particulate filter in an exhaust system with a fuel doser for normal and transient vehicle travel. The vehicle may be equipped with an electronically controlled compression ignition engine with an electronic control unit having memory and capable of receiving data signals from remote senor indicative of vehicle operating conditions.09-09-2010
20100050611PROCEDURE FOR OPERATING A COMBUSTION ENGINE WITH A SCR-CATALYZER - A combustion engine has in the exhaust gas area a SCR-catalyzer with a NH03-04-2010
20100212298METHOD OF REGENERATING AN EXHAUST AFTER TREATMENT DEVICE - A method of controlling combustion in an internal combustion engine with exhaust after treatment device is proposed, wherein upon detection of a request for a regeneration event of the exhaust after treatment device, a regeneration combustion mode comprising a pilot injection and a retarded main injection is operated. During the regeneration combustion mode the injection timing of the main injection is controlled so that its retard is not later than a retard threshold that is determined as the maximum timing retard to provide the desired torque, but with an injected fuel quantity not exceeding a maximum fuel quantity given by a stored smoke-limit map.08-26-2010
20100212297Construction Machine - [Problem] To provide a construction machine capable of realizing with fewer components temperature control of a reducing agent in a reducing agent tank without arranging any heat exchanger in the reducing agent tank.08-26-2010
20100146943Exhaust heat recovery device - An exhaust heat recovery device is provided with an evaporation portion for evaporating an operation fluid flowing therein by performing heat exchange with exhaust gas of an engine, a condensation portion for condensing the operation fluid flowing from the evaporation portion by performing heat exchange with coolant of the engine, and a flow adjusting portion for adjusting a flow amount of the operation fluid flowing from the condensation portion to the evaporation portion. A catalyst temperature detector is adapted to detect a temperature of a catalyst for purifying the exhaust gas, and a control unit sets a catalyst heating mode when the detected temperature of the catalyst is lower than a threshold value. Furthermore, the control unit causes the flow adjusting portion to adjust the flow amount of the operation fluid from the condensation portion to the evaporation portion at zero, in the catalyst heating mode.06-17-2010
20100050609System and method for outlet temperature control of an oxidation catalyst - An oxidation catalyst temperature control system and method for an engine having an exhaust means including an oxidation catalyst is provided. A post fuel calculation means calculates a value representing a post quantity of fuel to be introduced to generate an exothermic reaction in the oxidation catalyst based on a pre-determined desired outlet temperature of the oxidation catalyst, the calculation using a steady state model of the oxidation catalyst, the steady state model utilising the exhaust mass flow rate and the inlet temperature of the oxidation catalyst and instruction means to instruct the post quantity of fuel to be introduced to the engine.03-04-2010
20100050607System and method for controlling exhaust stream temperature - Systems and methods are provided for controlling an exhaust stream temperature at a point along an exhaust system. The exhaust system can include an oxidation catalyst, a particulate filter having an outlet, and a fuel injector for injecting fuel into an exhaust stream at a location upstream from the outlet. An adaptive control can be provided to model a portion of the exhaust system. A fuel injection flow rate at which fuel is injected into the exhaust stream by the fuel injector can be calculated based on the adaptive control model. An operation of the fuel injector can be controlled based on the calculated fuel injection flow rate, to control the exhaust stream temperature at point along the exhaust system. A condition of the exhaust stream can also monitored and an error in the adaptive control model can be determined based on the monitored condition. The adaptive control model can also be changed to reduce the error.03-04-2010
20100050605METHODS FOR REDUCING ENGINE EXHAUST EMISSIONS - A method for controlling an internal combustion engine wherein, during an initial, relatively low temperature operating phase of the engine, the engine operates with a modulated air/fuel ratio established independently of the operating condition of the engine and wherein, during a subsequent higher temperature operating phase of the engine, the air/fuel ratio is modulated in as a function of the operating conditions of the engine.03-04-2010
20100257848INTERNAL COMBUSTION ENGINE EXHAUST SYSTEM - An internal combustion engine exhaust system comprises an exhaust gas recirculation pipe which, in use, recirculates engine exhaust gas into the engine air intake. A particulate filter is provided and a burner arrangement is arranged to burn off particulates caught by the filter.10-14-2010
20100242446Controlled catalytic converter heating - The rate at which a catalytic converter for an internal combustion engine heats up to its normal operating temperature range can be increased by applying an electrical load that is powered by the internal combustion engine. Applying the electrical load demands more power from the engine which therefore has to work harder to maintain a given engine speed. The internal combustion engine then generates more heat that can be used to reduce the time to bring the catalytic converter up to its working temperature. The electrical load can be a catalytic converter heater to further reduce the time to bring the catalytic converter up to its working temperature. The result is a reduction in emissions.09-30-2010
20100126145Methods For Estimating Particulate Load In A Particulate Filter, And Related Systems - A method for regenerating a particulate filter may comprise calculating a first estimated soot load of a particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter, and calculating a second estimated soot load of the particulate filter based on a mass balance of soot in the particulate filter. The method may further comprise calculating a hybrid estimated soot load based on the first estimated soot load and the second estimated soot load, wherein calculating the hybrid estimated soot load comprises applying at least one gate so as to weight a relative contribution of each of the first estimated soot load and the second estimated soot load to the hybrid estimated soot load, and causing regeneration of the particulate filter when the hybrid estimated soot load is greater than or equal to a threshold value.05-27-2010
20100242449System and Method for Filtering Diesel Engine Exhaust Particulates - A diesel particulate filtering system that includes a filter configured to capture exhaust particulates from a diesel engine, a regeneration device configured to heat exhaust gases from the diesel engine prior to the exhaust gases reaching the filter, and a controller configured to control operation of the regeneration device, wherein the controller is further configured to turn the regeneration device on when a weighted average of a plurality of normalized parameter values exceeds a threshold value.09-30-2010
20100242447AMMONIA LOAD CONTROL FOR SCR CATALYST PRIOR TO DPF REGENERATION - A method and control system for a selective catalytic reduction (SCR) catalytic converter and a diesel particulate filter (DPF) includes a DPF control module that determines a particulate matter (PM) load progress of the DPF and generates a DPF regeneration request based on the PM load progress. The control system also includes an SCR control module that selectively adjusts an ammonia load of the SCR catalytic converter prior to regeneration of the DPF based on a storage capacity of the SCR catalytic converter and the PM load progress.09-30-2010
20100242445CONTROL APPARATUS AND METHOD FOR AIR-FUEL RATIO SENSOR - The ECU executes a program that includes the steps of: calculating the temperature Texp of the wall surface of the exhaust port and the temperature Tsen of the wall surface of the inner cover covering the zirconia element of the A/F sensor (S09-30-2010
20110056190EXHAUST GAS PURIFICATION APPARATUS OF AN INTERNAL COMBUSTION ENGINE - In an exhaust gas purification apparatus of an internal combustion engine, there is provided a technique capable of suppressing a reduction in exhaust gas purification performance. The apparatus includes: an exhaust gas purification catalyst (03-10-2011
20090107120METHOD AND DEVICE FOR TREATING THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE - A device for treating exhaust gas of an internal combustion engine includes a reducing agent solution evaporator, a hydrolysis catalytic converter connected thereto for hydrolysis of urea to form ammonia and an SCR catalytic converter for selective catalytic reduction of nitrogen oxides. The evaporator includes an evaporator unit providing a gaseous substance mixture including at least one reducing agent precursor and/or reducing agent. The evaporator unit evaporates an aqueous solution including at least one reducing agent precursor. The SCR catalytic converter is in an exhaust line, and the evaporator and the hydrolysis catalytic converter are outside of and can be connected to the exhaust line. A sufficiently large quantity of reducing agent for selective catalytic reduction of nitrogen oxides in the SCR catalytic converter can be provided, while permitting a smaller volume of the hydrolysis catalytic converter than in the prior art, since it is not traversed by exhaust gas.04-30-2009
20090178392Exhaust Gas Purification System for Internal Combustion Engine and Method for Regenerating Purification Ability of Exhaust gas Purification Device - The problem is to regenerate the purification ability of an exhaust gas purification device more reliably or efficiently in an exhaust gas purification system that combines a plurality of branch passages branch off from an exhaust gas passage and exhaust gas purification devices. When the purification ability of an exhaust gas purification device is regenerated, in the branch passage where the exhaust gas purification device is provided whose purification ability is to be regenerated, the opening angle of an exhaust gas flow volume control valve is set to the minimum opening angle that can reliably transport a reducing agent that is added from a reducing agent addition section. While the opening angle is maintained, the reducing agent is added. After the addition of the reducing agent is complete, the opening angle of an exhaust gas flow volume control valve is closed completely.07-16-2009
20100218486EXHAUST GAS PURIFICATION DEVICE - An exhaust gas purification device includes a NO09-02-2010
20090151330DETERMINATION OF DIESEL PARTICULATE FILTER LOAD UNDER BOTH TRANSIENT AND STEADY STATE DRIVE CYCLES - Systems and methods for updating the PF soot load of an engine are provided herein. In one embodiment, the method may include performing regeneration in response to both pressure-based measurements as well as estimated soot loading independent of the pressure-based measurements, where during conditions in which the pressure-based measurements may be inaccurate, the soot load is estimated based on operating conditions and previous pressure-based measurements that occurred during previous conditions in which the pressure-based measurements are more accurate. In this way, more continuous monitoring of particulate filter loading is provided, while taking advantage of pressure-based measurements from the most recent accurate reading, for example, and operating conditions that have transpired since such reading, including transient conditions. Thus, more appropriately timed regeneration may be provided.06-18-2009
20090183497EXHAUST GAS PURIFYING APPARATUS - In a hybrid vehicle equipped with an exhaust gas purifying apparatus, when a gasoline engine stops, an exhaust gas passage is closed by a pair of upstream-side and downstream-side throttle units to form an accommodation space. A pressure reduction unit reduces a pressure of the closed accommodation space where a three way catalyst is placed. The exhaust gas around the three way catalyst in the closed accommodation space does not leak into either an outside atmosphere side or into the gasoline engine side. Reducing the pressure in the closed accommodation space decreases heat conduction through the exhaust gas toward the outside. It is thereby possible to prevent the temperature drop of the three way catalyst and to keep the three way catalyst at a temperature of not less than its activation temperature for a long period of time even if the gasoline engine stops.07-23-2009
20090113878SYSTEM AND METHOD FOR ASSISTING REGENERATION OF A DIESEL ENGINE PARTICULATE FILTER - The invention concerns a system for assisting regeneration of a particulate filter (05-07-2009
20080282677Electially heated particulate filter preparation methods and systems - A control system that controls regeneration of a particulate filter is provided. The system generally includes a fuel control module that controls injection of fuel into exhaust that passes through the particulate filter. A regeneration module controls current to the particulate filter to initiate regeneration after the fuel has been injected into the exhaust.11-20-2008
20090038291Internal Combustion Engine - A post-treatment system comprised of an SO02-12-2009
20090038290EXHAUST GAS PURIFICATION DEVICE - An ECU corrects a fuel addition interval, based on an amount of change between a present backpressure and a basic backpressure obtained when a basic addition interval is set, to reduce the fuel addition interval with an increase in the amount of change in the backpressure (steps ST02-12-2009
20090107122METHOD FOR PURIFICATION OF EXHAUST GAS FROM INTERNAL COMBUSTION ENGINE - Temperature range enabling combustion of high concentration hydrocarbon is enlarged, or high temperature gas is rapidly supplied to a latter part catalyst. Provided is a method for purification of exhaust gas from an internal combustion engine, by using a catalyst for increasing temperature of exhaust gas from an internal combustion engine, wherein hydrocarbon from 1,000 to 40,000 ppm by volume, as converted to methane, to the exhaust gas, is introduced at the upstream side of the catalyst for increasing temperature, along flow of the exhaust gas inside a passage of exhaust gas from the internal combustion engine.04-30-2009
20090107121Exhaust gas control apparatus for internal combustion engine04-30-2009
20090107116EXHAUST GAS TREATMENT04-30-2009
20100293926HYDROCARBON SELECTIVE CATALYTIC REDUCTION FOR NOx CONTROL WITH GASOLINE-FUELED SPARK IGNITION ENGINES USING ENGINE-OUT HYDROCARBONS - A method for controlling hydrocarbon delivery to a hydrocarbon selective catalytic reduction device configured to receive an exhaust gas flow from an internal combustion engine includes monitoring measurable variable terms including factors affecting a conversion efficiency in the hydrocarbon selective catalytic reduction device, determining classifications of the measurable variable terms based upon measurable variable ranges, determining a desired hydrocarbon delivery value range based upon the classifications; and utilizing the desired hydrocarbon delivery value range to control the hydrocarbon delivery to the hydrocarbon selective catalytic reduction device.11-25-2010
20090071130Fuel Addition Control Method Applied to Exhaust Emission Purifier of Internal Combustion Engine and Exhaust Emission Purifier - An exhaust emission purifier able to suppress overheats of an exhaust emission purifying catalyst and execute fuel addition promptly when fuel addition to the exhaust emission purifying catalyst is requested is provided. In the exhaust emission purifier of an internal combustion engine including exhaust emission purifying catalyst of purifying exhaust emission of an internal combustion engine and a fuel addition valve of adding fuel from upstream of the exhaust emission purifying catalyst, cycles are repeated in order that the exhaust emission purifying catalyst is to be regulated at a target temperature, the cycle being a combination of an addition period during which fuel is added from the fuel addition valve and a halt period during which fuel addition is halted, and the fuel addition valve is manipulated such that the halt period is disposed so as to sandwich the addition period in the cycle. The length of the pre-addition halt period disposed before the addition period is varied in accordance with the temperature of the exhaust emission purifying catalyst at the start point of the cycle.03-19-2009
20090071129ELECTRICALLY HEATED PARTICULATE MATTER FILTER SOOT CONTROL SYSTEM - A regeneration system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas and a downstream end. A control module determines a current soot loading level of the PM filter and compares the current soot loading level to a predetermined soot loading level. The control module permits regeneration of the PM filter when the current soot loading level is less than the predetermined soot loading level.03-19-2009
20090071128LOW EXHAUST TEMPERATURE ELECTRICALLY HEATED PARTICULATE MATTER FILTER SYSTEM - A system includes a particulate matter (PM) filter, a sensor, a heating element, and a control module. The PM filter includes with an upstream end that receives exhaust gas, a downstream end and multiple zones. The sensor detects a temperature of the exhaust gas. The control module controls current to the heating element to convection heat one of the zones and initiate a regeneration process. The control module selectively increases current to the heating element relative to a reference regeneration current level when the temperature is less than a predetermined temperature.03-19-2009
20090071125Exhaust Purification Apparatus of Compression Ignition Type Internal Combustion Engine - In an internal combustion engine, an SOx trap catalyst (03-19-2009
20100300075ELECTICALLY HEATED PARTICULATE FILTER INCOMPLETE REGENERATION IDENTIFICATION SYSTEM AND METHOD - A system comprises a regeneration module and a diagnostic module. The regeneration module controls an electric heater to heat exhaust gas produced by an engine. The regeneration module determines when a regeneration cycle of a particulate matter (PM) filter begins by comparing a temperature of the exhaust gas input to the PM filter and a first temperature threshold. The diagnostic module determines a regeneration status by comparing a temperature of the exhaust gas output by the PM filter and a second temperature threshold during a predetermined period after the regeneration cycle begins.12-02-2010
20100300076Process For Controlling The Injection Of Urea In A Selective Catalytic Reduction System - The invention relates to a process for controlling the injection of urea in a selective catalytic reduction, known as CR, system for treating nitrogen oxides, intended to be installed in the exhaust line (12-02-2010
20100300074EXHAUST HYDROCARBON INJECTION CONTROL SYSTEM AND METHOD - A system comprises an injection control module and a fuel film module. The injection control module controls a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas. The fuel film module determines an accumulation rate of fuel on a surface of the exhaust system based on the flow rate of the fuel. The fuel film module determines a release rate of fuel from the surface of the exhaust system based on a flow rate of the exhaust gas. The injection control module adjusts the flow rate of the fuel based on the accumulation rate and the release rate.12-02-2010
20100313551METHOD AND SYSTEM FOR REGENERATING AN EXHAUST GAS PURIFICATION UNIT - A method for regenerating an exhaust gas purification unit arranged in an internal combustion engine system includes setting a predefined minimum engine speed such that the exhaust gas mass flow exceeds a predefined flow value during the regeneration process. An internal combustion engine system including an exhaust gas purification unit adapted to be operated according to the method is also provided.12-16-2010
20110126523EXHAUST EMISSION PURIFIER OF INTERNAL COMBUSTION ENGINE - An object of this invention is to prevent components such as NOx and H2S being emitted when starting a vehicle and improve exhaust emissions by utilizing information of a navigation system. A navigation system mounted in the vehicle is connected to an ECU. The ECU predicts whether a stopping time of the internal combustion engine is near based on the current position and travel history of the vehicle obtained from the navigation system. When a stopping time is near, the ECU executes rich spike control prior to the stopping time to thereby perform a regeneration process of the NOx catalyst. Thus, NOx components or sulfur components remaining in the catalyst can be eliminated before stopping the internal combustion engine. Accordingly, even if warming up is performed when the engine is next started, emission of NOx or hydrogen sulfide can be avoided.06-02-2011
20110000196CONTROL DEVICE OF REDUCING AGENT SUPPLY APPARATUS, REDUCING AGENT COLLECTION METHOD, AND EXHAUST GAS PURIFICATION APPARATUS - A control device of a reducing agent supply apparatus, a reducing agent collection method, and an exhaust gas purification apparatus are provided, which can inhibit a reducing agent from leaking into an exhaust gas passageway, when performing control of collection of the reducing agent inside reducing agent supply paths.01-06-2011
20110000195REDUCED VOLUME ELECTRICALLY HEATED PARTICULATE FILTER - A control system comprises an exhaust treatment system, an electric heating module, and an exhaust heating module. The exhaust treatment system comprises a particulate matter (PM) filter and an electric heater. The PM filter includes M zones that receive exhaust gas of an engine and filter PM from the exhaust gas. The electric heater heats exhaust gas input to N of the M zones, wherein M is an integer greater than one and N is an integer less than M. The electric heating module activates the electric heater to heat exhaust gas input to the N zones to regenerate the N zones. The exhaust heating module heats exhaust gas input to the M zones by controlling an air-fuel ratio of the exhaust gas after the N zones regenerate.01-06-2011
20090183496EXHAUST GAS PURIFYING APPARATUS - A throttle unit placed in an exhaust gas passage controls an opening-ratio of each of first and second valve members to control a gas-flow sectional area of the exhaust gas passage. When the temperature of a three-way catalyst is low, the throttle unit introduces the exhaust gas flow into a part of an outer-periphery of the three-way catalyst. This control can rapidly increase the temperature of the three-way catalyst from an early period of starting an internal combustion engine within a short period of time. The throttle unit increases the gas-flow sectional area of the exhaust gas passage according to increasing the temperature of the three-way catalyst. When the three-way catalyst reaches its activation temperature, the throttle unit instructs the first and second valve members to fully open. This decreases a pressure loss of the exhaust gas because the exhaust gas is supplied into the entire of the three-way catalyst.07-23-2009
20110016851INTERNAL COMBUSTION ENGINE EXHAUST AFTER-TREATMENT SYSTEM AND METHOD - Embodiments described herein relate to internal combustion engine exhaust after-treatment systems and to methods of treating exhaust of an internal combustion engine.01-27-2011
20110030349QUICK-HEATING OF A UREA SUPPLY CONDUIT FOR AN ENGINE EXHAUST AFTER-TREATMENT SYSTEM - A urea supply conduit (02-10-2011
20130152553Selective Catalytic Reduction (SCR) System For NOx Storage - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, a flow-through container of absorbent particles, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, 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 (“NO06-20-2013
20090064666Heatable hose conduit system for an exhaust-gas aftertreatment system of an internal combustion engine - A heatable hose conduit system is provided for an arrangement for the aftertreatment of exhaust gas in an internal combustion engine. The arrangement introduces a liquid reduction agent into the exhaust gas of the engine. The heatable hose conduit system has hose conduits that conduct the liquid reduction agent and are arranged in pairs in close proximity to hose conduits that conduct heating water. At least one end of at least one pair of hose conduits (03-12-2009
20090064665Method of controlling exhaust gas purification system, and exhaust gas prufication system03-12-2009
20090064664Device for Cleaning Exhaust Gas of Internal Combustion Engine - A device for cleaning exhaust gas of an internal combustion engine according to the present invention includes a device (03-12-2009
20110061372INTRUSIVE SCR EFFICENCY TESTING SYSTEMS AND METHODS FOR VEHICLES WITH LOW TEMPERATURE EXHAUST GAS - An exhaust diagnostic system includes an exhaust gas temperature management module that selectively increases a temperature of a selective catalytic reduction (SCR) catalyst to a predetermined testing temperature range using an intrusive exhaust gas temperature management approach. An SCR efficiency testing module estimates an efficiency of the SCR catalyst while the temperature is within the predetermined temperature range.03-17-2011
20090313973PROCEDURE FOR OPERATING A REAGENT METERING DEVICE AND DEVICE FOR IMPLEMENTING THE PROCEDURE - A method of operating a reagent metering device, which contains a metering valve that is controlled by a metering signal, at which the reagent pressure actual value is detected in the reagent path between the metering valve and the injection valve, and at which a metering rate nominal value is specified, and a device for implementing the method. The method includes influencing of the metering signal (s_DV) with the aid of a measure for the detected reagent pressure actual value and with the aid of a stored relation between the measure for the reagent pressure actual value and a metering rate actual value. The method enables an operating of the reagent metering device with only one pressure sensor in the reagent path between the injection valve and the metering valve.12-24-2009
20100132337EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - This invention is intended to ensure that an exhaust gas purification device with an NOx storage reduction catalyst and a particulate filter is able to fully utilize an original NOx storage capability of the NOx storage reduction catalyst. For this end, in addition to the filter 06-03-2010
20100132336EXHAUST GAS PURIFICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A degree of dispersion of a reducing agent added to an exhaust gas flowing into an exhaust gas purification apparatus is controlled. Before addition fuel is added, a valve opening Vd of a flow area changing valve is changed to generate pulsation of the exhaust gas, so that addition valve vicinity exhaust gas pressure Pg varies periodically. Addition timing TMad is controlled to synchronize with extremum arrival timing TMe. High or low dispersion type addition control adds fuel at timing (CP) when the addition valve vicinity exhaust gas pressure Pg becomes a maximum value Pgmax, at timing (TP) when at a minimum value Pgmin, or at both timings (CP, TP).06-03-2010
20090071127FACE CRACK REDUCTION STRATEGY FOR PARTICULATE FILTERS - A system comprises a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion. A control module initiates combustion of PM in the PM filter using a heater and selectively adjusts oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter. A method comprises providing a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion; initiating combustion of PM in the PM filter using a heater; selectively adjusting oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter.03-19-2009
20100199643EXHAUST GAS PURIFICATION SYSTEM - The invention relates to an exhaust gas purification system (08-12-2010
20100192545EXHAUST AFTERTREATMENT SYSTEM - An exhaust aftertreatment system connected to an internal combustion engine operative lean of stoichiometry includes first and second selective catalytic reactor devices. A preferred ratio of hydrocarbon:NOx to achieve a preferred concentration of ammonia immediately downstream of the first selective catalytic reactor device is determined. An ethanol-based reductant is dispensed upstream of the first selective catalytic reactor device.08-05-2010
20090031708Application of Microturbines to Control Emissions From Associated Gas - A system for controlling the emission of associated gas produced from a reservoir. In an embodiment, the system comprises a gas compressor including a gas inlet in fluid communication with an associated gas source and a gas outlet. The gas compressor adjusts the pressure of the associated gas to produce a pressure-regulated associated gas. In addition, the system comprises a gas cleaner including a gas inlet in fluid communication with the outlet of the gas compressor, a fuel gas outlet, and a waste product outlet. The gas cleaner separates at least a portion of the sulfur and the water from the associated gas to produce a fuel gas. Further, the system comprises a gas turbine including a fuel gas inlet in fluid communication with the fuel gas outlet of the gas cleaner and an air inlet. Still further, the system comprises a choke in fluid communication with the air inlet.02-05-2009
20090031707Exhaust gas purification apparatus for internal combustion engine - In an exhaust gas purification apparatus for an internal combustion engine, a technique is provided which makes it possible to recover an exhaust gas purification ability more efficiently than ever. In the exhaust gas purification apparatus for an internal combustion engine which recovers an exhaust gas purification ability of a filter by supplying fuel to the filter that is arranged on an exhaust passage of the internal combustion engine for purifying an exhaust gas, in case where the exhaust gas purification ability of the filter is to be recovered, the supply of fuel is executed so as to make the degree of fuel atomization relatively low, as shown in (b), when the temperature of an exhaust gas flowing into the filter is in a first predetermined range, and when the temperature of the filter is in a second predetermined range, whereas the supply of fuel is executed so as to make the degree of fuel atomization relatively high, as shown in (a), when the temperature of the exhaust gas flowing into the filter is lower than a lower limit temperature of the first predetermined range, or when the temperature of the filter is higher than an upper limit temperature of the second predetermined range.02-05-2009
20110061374EXHAUST GAS TREATMENT SYSTEM - An exhaust gas treatment system includes an exhaust passage through which exhaust gas from an internal combustion engine is allowed to flow, a selective catalytic reduction catalyst provided in the exhaust passage, a mixing chamber provided upstream of the selective catalytic reduction catalyst in the exhaust passage as viewed in the direction of exhaust gas flow, a fuel injection valve for injection of fuel, an air injection valve for injection of air, and a urea water injection valve for injection of urea water. The fuel injection valve, the air injection valve and the urea water injection valve each has an injection port directed to the mixing chamber.03-17-2011
20100186385ELECTRICALLY HEATED PARTICULATE FILTER WITH ZONED EXHAUST FLOW CONTROL - A system includes a particulate matter (PM) filter that includes X zones. An electrical heater includes Y heater segments that are associated with respective ones of the X zones. The electrical heater is arranged upstream from and proximate with the PM filter. A valve assembly includes Z sections that are associated with respective ones of the X zones. A control module adjusts flow through each of the Z sections during regeneration of the PM filter via control of the valve assembly. X, Y and Z are integers.07-29-2010
20110061373VEHICLE RELOCATABLE EXHAUST SYSTEM COMPONENTS - Modification of reductant (e.g., diesel exhaust fluid, DEF) tank location, for example during vehicle up-fitting may result in less than optimal operation of the DEF system due to inaccurate DEF system calibration. In one example approach, the above issue can be at least partially addressed by adjusting control system parameters for system control and diagnostics based on an input indicative of, or any modification to, the DEF tank location. In this way, DEF tank location flexibility is maintained, while also maintaining emission control and diagnostic accuracy.03-17-2011
20100037598METHOD FOR PROVIDING AMMONIA FOR THE SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES AND CORRESPONDING DEVICE - A method and a device for providing ammonia for the selective catalytic reduction of nitrogen oxides in the exhaust system of an internal combustion engine, include the following steps: a) recording at least one actuating variable for influencing the state of the internal combustion engine; b) calculating a possible nitrogen oxide emission of the internal combustion engine on the basis of an evaluation of the at least one measured variable; c) calculating an ammonia quantity which corresponds to the possible nitrogen oxide emission; and d) initiating the provision of the corresponding ammonia quantity by exhaust-gas-external evaporation in an evaporator and exhaust-gas-external hydrolysis of aqueous urea solution, wherein at least one of the following values: i) the heating power of the evaporator or ii) the quantity of aqueous urea solution supplied to the evaporator, is regulated on the basis of the ammonia quantity calculated in step c).02-18-2010
20110247319EXHAUST EMISSION PURIFYING APPARATUS AND LIQUID LEVEL MEASURING DEVICE - The present invention provides an exhaust emission purifying apparatus having a liquid level measuring device in which, when a liquid level (measured liquid level) measured by a liquid level indicator of a sensor is equal to or than a measurable lower limit, the measured liquid level is output. On the other hand, when the measured liquid level is less than the measurable lower limit, the liquid level estimated based on a consumption of a liquid reducing agent or its precursor in a reducing agent tank and a tank cross-sectional area is output. The liquid level of the liquid reducing agent or its precursor is estimated in a range in which the liquid level may not be accurately measured due to the presence of a concentration meter, whereby the liquid level can be measured over a wide range.10-13-2011
20100037596EXHAUST PURIFICATION DEVICE OF COMPRESSION IGNITION TYPE INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO02-18-2010
20090301068EXHAUST-GAS PURIFICATION APPARATUS AND METHOD FOR PURIFYING EXHAUST GAS - A NOx catalyst is provided in an exhaust passage of an internal combustion engine for selectively purifying NOx in exhaust gas with a reducing agent. A charging unit charges the reducing agent at an upstream of the NOx catalyst. A pressurizing unit supplies the reducing agent to the charging unit. An obtaining unit detects or estimates catalyst temperature of the NOx catalyst or temperature information, which is correlated with the catalyst temperature. A particle size control unit changes reducing-agent pressure of reducing agent, which is pressurized by the pressurizing unit and supplied to the charging unit, to control an atomized particle size of the reducing agent, which is atomized from the charging unit and charged into exhaust gas, based on the catalyst temperature or the temperature information.12-10-2009
20100000203EXHAUST EMISSION CONTROL DEVICE - The object of the invention is to improve mountability on a vehicle by realizing a compact arrangement of a particulate filter 01-07-2010
20090217647METHOD AND DEVICE FOR REGENERATING THE PARTICLE FILTER OF AN INTERNAL COMBUSTION ENGINE DURING THE TRANSIENT OPERATING PHASES THEREOF - The invention relates to a method for regenerating a particle filter on the exhaust line of an internal combustion engine, in which fuel is injected into the exhaust tube upstream of an oxidation catalyst which is disposed upstream of the particle filter. The invention is characterised in that during regeneration: the injection of fuel into the exhaust tube is interrupted when the operation of the engine enters a critical zone (S09-03-2009
20090217645METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE TO HEAT UP A SELECTIVE CATALYST REDUCER - In one embodiment, the present invention relates to a method to operate an internal combustion engine equipped with an Electronic Control Unit (ECU) with memory, an exhaust system including a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF), upstream of a Selective Catalyst Reducer (SCR). A doser is in the DPF and actuated by commands from the ECU. The method includes sensors at the DPF and SCR electronically connected to the ECU to transmit data signals indicative of operating conditions at the DPF and SCR. The method includes sensing the temperature at an outlet of the DPF and an inlet at the SCR determining whether that temperature is at least a predetermined temperature for a predetermined period of time, and introducing heat to the SCR to raise its temperature to a predetermined level for a predetermined period of time, such as light off temperature, to operate more efficiently. Heat may be introduced in the exhaust stream by engine thermal management strategies as well.09-03-2009
20100071350INTERNAL COMBUSTION ENGINE EXHAUST SYSTEM EQUIPPED WITH POLLUTION REDUCTION SYSTEMS - Exhaust system for an internal combustion engine (03-25-2010
20100071351EXHAUST EMISSION CONTROL SYSTEM FOR ENGINE AND CONTROL METHOD THEREFOR - An exhaust emission control system, which comprises control means 03-25-2010
20100064668METHOD FOR HEATING A REDUCING AGENT METERING VALVE IN AN SCR SYSTEM FOR EXHAUST GAS AFTER-TREATMENT IN AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for the operation of an electromagnetically controllable reducing agent metering valve that is disposed in the exhaust gas system of an internal combustion engine and that is actuated with a first flow profile (03-18-2010
20100058740Managing Reductant Slip in an Internal Combustion Engine - A method for controlling operation of vehicle system including an internal combustion engine and a catalytic emission control device coupled in an exhaust of the engine, the method including delivering, which may include injecting into the exhaust, reductant to the emission control device responsive to vehicle operating conditions, and increasing emission control device inlet-NOx in response to reductant release from the emission control device.03-11-2010
20100058742EXHAUST EMISSION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - One object of the present invention is to provide an exhaust emission control apparatus for an internal combustion engine that is capable of improving the NOx purification performance.03-11-2010
20100058741EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO03-11-2010
20100064666CARBON DEPOSITION ELIMINATION METHOD - A carbon deposition eliminating method includes the steps of: a) providing an exhaust pipe having a waste gas inlet and an air inlet at one end and an exhaust gas purifier at the other end and a combustion chamber on the middle, b) using a sensor to detect the pressure of the waste gas in the combustion chamber, c) enabling an automatic control system to open the air inlet for guiding outside fresh air into the combustion chamber when the waste gas pressure in the combustion chamber is high, d) starting a flamethrower to heat the combustion chamber to about 350° C.˜600° C., e) enabling the heated high temperature waste gas to pass through the exhaust gas purifier and to carry cumulated carbon away from the exhaust gas purifier, and f) enabling the automatic control system to close the air inlet and to open the waste gas inlet for letting engine exhaust gas to pass through the exhaust pipe when the waste gas pressure in the combustion chamber drops below the predetermined pressure level.03-18-2010
20100064667APPARATUS AND METHOD FOR EXHAUST GAS POSTTREATMENT - The invention relates to an exhaust gas aftertreatment device for an internal combustion engine supercharged in two stages, having an oxidation catalyst, a particle filter, and a metering device for introducing a regeneration agent into an exhaust gas system, and to an associated method for exhaust gas aftertreatment. According to the invention, the metering device is arranged in the exhaust gas system between a high-pressure turbine and a low-pressure turbine which produce two-stage supercharging of the internal combustion engine.03-18-2010
20110083426EMISSION CONTROL SYSTEM WITH HEAT RECOVERY DEVICE - In an emission control system, an absorbent in exhaust-emission passage absorbs a particular component in the emission with a temperature thereof being lower than a first temperature, and desorbs therefrom the absorbed particular component with the temperature thereof being equal to or higher than the first temperature. A catalyst in the exhaust-emission passage converts the particular component desorbed from the absorbent into another component with a temperature thereof being equal to or higher than a second temperature higher than the first temperature. A heat recovery device is disposed in the exhaust-emission passage upstream of the absorbent and recovers heat from the exhaust emission by heat exchange between a heat-transfer medium and the exhaust emission. An adjusting unit adjusts an amount of heat to be recovered by the heat recovery device to thereby adjust a temperature state of the exhaust emission.04-14-2011
20110099984EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust purification apparatus for an internal combustion engine comprises a first oxidation catalyst arranged in an exhaust passage of an engine, a mixer arranged on the downstream side of the first oxidation catalyst, and a second oxidation catalyst arranged on the downstream side of the mixer. A repetitive control is carried out in such a way that a period in which an air-fuel ratio of exhaust gas discharged from an engine body is rich and a period in which the air-fuel ratio is lean are alternately repeated when the temperature of the second oxidation catalyst is to be increased, so that a part of the unburnt fuel contained in a rich exhaust gas discharged from the engine body and a lean exhaust gas discharged from the engine body are mixed in the mixer after passing through the first oxidation catalyst and are subject to oxidization in the second oxidation catalyst.05-05-2011
20080295496INJECTION ANTI-COKING SYSTEM FOR PARTICULATE FILTERS - A system comprising an injector for injecting fuel directly into the exhaust system. A control module supplies fuel using the injector to burn particulate matter in the particulate filter when the control module determines that regeneration is needed. The control module selectively supplies fuel to exercise the injector during periods when the control module determines that regeneration is not needed.12-04-2008
20110072800PARTICULATE FILTER REGENERATION IN AN ENGINE - Systems and methods for controlling regeneration of a particulate filter downstream of an engine having a plurality of cylinders are provided. One exemplary method includes, during first conditions, spinning down the engine to non-combusting engine rest, and regenerating the particulate filter at least during engine rest. The method also includes, during second conditions, regenerating the particulate filter during combustion of at least one cylinder of the engine.03-31-2011
20110072798NOx CONTROL REQUEST FOR NH3 STORAGE CONTROL - An exhaust gas treatment system includes a selective catalytic reduction (SCR) catalyst and a dosing control responsive to exhaust gas operating conditions for controlling the dosing rate of a reductant such as aqueous urea into the exhaust stream. When the dosing control determines that NH03-31-2011
20110072799PARTICULATE FILTER REGENERATION DURING ENGINE SHUTDOWN - Systems and methods for controlling regeneration of a particulate filter downstream of an engine in a vehicle are provided herein. One exemplary method includes, during first engine shutdown conditions, increasing excess oxygen to the particulate filter, and regenerating the particulate filter at least during a portion of engine shutdown. The method further includes during second engine shutdown conditions, decreasing the excess oxygen to the particulate filter at least during a portion of engine shutdown.03-31-2011
20110061371HYDROCARBON AND NOx TRAP - A hydrocarbon and NOx trap and related apparatus and methods for reducing cold-start NOx emissions from an engine are provided. In one embodiment a trap includes a first, topmost layer, exposed to an exhaust gas flow path of exhaust gases from an engine, the first layer comprising a zeolite, a second layer, substantially covered by the top most layer, the second layer comprising a NOx adsorbing material and a monolithic substrate, directly supporting the second layer and indirectly supporting the first layer, the substrate providing a substantially rigid structure of the trap.03-17-2011
20110047985SYSTEM 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.03-03-2011
20110047984EXHAUST SYSTEM - An exhaust system, may include an exhaust line through which exhaust gas passes, a nitrogen oxide purification catalyst that is mounted on the exhaust line to reduce nitrogen oxide of the exhaust gas, an injector that is mounted at an upstream side of the nitrogen oxide purification catalyst to additionally inject fuel such that nitrogen oxide that is trapped in the nitrogen oxide purification catalyst is detached to be reduced thereby, and a control portion that varies an injection pattern of the injector if it is determined that a purification rate of the nitrogen oxide purification catalyst is higher than a first predetermined value.03-03-2011
20110047986Retrofit Aftertreatment System for Treating Diesel Exhaust - An exhaust aftertreatment system for diesel engines includes a filtration station, a NOx reduction station, a temperature sensor, a pressure data generator, a NOx sensor, a reductant dispenser, and a controller. The filtration station filters particulate material from the exhaust. The NOx reduction station reduces NOx concentration in the exhaust. The temperature sensor generates first data that is representative of a temperature of the exhaust. The pressure data generator generates second data that is indicative of a pressure differential across a control volume that is located at the NOx reduction station. The control volume includes at least one catalyzed substrate. The NOx sensor generates third data that is representative of the NOx concentration in the exhaust. The reductant dispenser dispenses reductant into the exhaust. The controller controls a dosing rate of the reductant dispenser. The controller uses the first, second, and third data to determine the dosing rate.03-03-2011
20110047983EXHAUST SYSTEM - An exhaust system may include an exhaust line through which exhaust gas that is formed in an engine is exhausted, a nitrogen oxide purification catalyst that is disposed on the exhaust line to reduce nitrogen oxide that is included in the exhaust gas, an injector to additionally inject fuel into the exhaust line or a cylinder, and a fuel cracking catalyst that is disposed between the injector and the nitrogen oxide purification catalyst to crack the fuel that is injected through the injector, to transform the injected fuel into a high efficiency reducing agent, and to raise the temperature of the latter part thereof through an oxidation reaction.03-03-2011
20110047982CONTROL OF DIESEL PARTICULATE FILTER REGENERATION DURATION - Termination of regeneration of a particulate filter may be based on a variable percent threshold of stored particulate, where the percent threshold of stored particulate depends on a current soot burn rate. In one example approach, a method for controlling regeneration of a diesel particulate filter comprises: terminating regeneration based on a particulate burning rate; wherein the particulate burning rate is based on operating conditions of the diesel particulate filter; the operating conditions including an amount of stored particulate in the diesel particulate filter and a temperature of the diesel particulate filter.03-03-2011
20110030350EXHAUST GAS PURIFYING APPARATUS - An exhaust gas purification apparatus includes an oxidation catalyst provided in a passage through which exhaust gas flows, a urea decomposition accelerator, a selective catalytic reduction catalyst provided downstream of the urea decomposition accelerator and a urea water supplying device for supplying urea water to the urea decomposition accelerator. The urea decomposition accelerator is provided downstream end surface of the oxidation catalyst and has at least one of hydrophilic function and hydrolytic catalytic function.02-10-2011
20100257847EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In the present exhaust purification system of an internal combustion engine, a particulate filter is arranged downstream of an NOx storage/reduction catalyst device and an S trap device is arranged upstream of the NOx storage/reduction catalyst device. A first fuel supplying means for supplying additional fuel for regeneration of the particulate filter to the exhaust system upstream of the S trap device or into the cylinder is provided. An amount of the additional fuel supplied by the first fuel supplying means is controlled to make the S trap device not release SOx. A second fuel supplying means is provided in the exhaust system between the NOx storage/reduction catalyst device and the particulate filter to make up for a deficiency of the additional fuel supplied by the first fuel supplying means in the regeneration treatment of the particulate filter.10-14-2010
20090007548Exhaust Gas Purification System of Internal Combustion Engine - A catalyst suited for reducing NOx in an exhaust gas by ammonia in the presence of excess oxygen is arranged in an engine exhaust passage. An aqueous urea solution is fed from a flow addition valve onto a catalyst, part of the urea fed to the catalyst is stored in the catalyst, and the ammonia generated from the urea stored in the catalyst is used to reduce the NOx in the exhaust gas. At the time of engine startup, at the time of cold operation, and at the time of increase of the HC amount, it is determined that the amount of formaldehyde in the exhaust gas flowing into the catalyst exceeds the allowable amount, and, at this time, the feed of urea to the catalyst is prohibited.01-08-2009
20090007549Method Of Controlling Exhaust Gas Purification System And Exhaust Gas Purification System - In in-cylinder fuel multi-injection conducted during forced regeneration of a DPF (01-08-2009
20090007547Control Method of Exhaust Gas Purification System and Exhaust Gas Purification System - At regeneration control while a vehicle mounting an internal combustion engine (01-08-2009
20100077733EMISSION SYSTEM, APPARATUS, AND METHOD - An emission reduction apparatus is provided that includes a fuel conversion unit configured to convert a first portion of fuel from a fuel tank into a set of reducing agents that includes hydrogen, an exhaust path configured to convey an exhaust stream containing nitrogen oxides away from an engine, a transport system configured to transport each of a second portion of fuel from the fuel tank, the set of reducing agents, and the hydrogen into the exhaust path such that a mixture is formed, and the catalytic material configured to aid in a conversion of at least a portion of the nitrogen oxides in the exhaust stream of the mixture into nitrogen.04-01-2010
20090260349AIR-INJECTION SYSTEM TO IMPROVE EFFECTIVENESS OF SELECTIVE CATALYTIC REDUCTION CATALYST FOR GASOLINE ENGINES - Embodiments are described to improve the durability of a lean NO10-22-2009
20090249768Exhaust Purification System of Internal Combustion Engine - HC feed control for feeding HC into exhaust gas upstream of an SOx trap 10-08-2009
20090000280ADDITION-AMOUNT CONTROLLER FOR EXHAUST GAS PURIFYING AGENT AND EXHAUST EMISSION CONTROL SYSTEM - In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system, a catalyst has properties of storing NH01-01-2009
20090000278ADDITION-AMOUNT CONTROLLER FOR EXHAUST GAS PURIFYING AGENT AND EXHAUST EMISSION CONTROL SYSTEM - In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system of an engine, one mode is executed based on satisfaction of an execution condition for each mode, from among a plurality of control modes. The control modes includes a purification control mode in which an addition amount of NH01-01-2009
20090126350EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device reduces nitrogen oxide in exhaust air from an engine. The device includes an exhaust pipe, a catalyst, a supply device, a NOx detecting device, and a control device. The pipe defines a passage for the exhaust air. The catalyst is disposed in the pipe and promotes reduction reaction of the nitrogen oxide. The supply device supplies an additive agent, which is used for the reaction, to an upstream side of the catalyst in the exhaust air flow direction. The detecting device detects the nitrogen oxide included in the exhaust airs which has passed through the catalyst. The control device controls the supply device. The control device determines a deterioration state of the catalyst based on a result detected by the detecting device and reduces an amount of the additive agent, which is supplied, according to the determined deterioration state.05-21-2009
20080314029Exhaust purification device - An exhaust purification device increases temperature of a particulate filter by at least one of a first temperature increase device and a second temperature increase device to combust and remove particulate matters deposited in a particulate filter. The second temperature increase device increases the temperature of the particulate filter to temperature higher than the temperature achieved by the first temperature increase device. An engine output at the time when the second temperature increase device performs the temperature increase operation is equal to an engine output at the time when the first temperature increase device performs the temperature increase operation. The exhaust purification device sets a ratio between an operation period of the first temperature increase device and an operation period of the second temperature increase device according to estimated temperature of the particulate filter.12-25-2008
20080314027Exhaust Gas Treatment12-25-2008
20080314026Exhaust Gas Purifying System for Internal Combustion Engine and Exhaust Gas Purifying Method - An exhaust gas purifying device that is provided in an exhaust passage of an internal combustion engine and purifies exhaust gas, and a reducing agent injection valve that injects fuel to a position upstream of the exhaust gas purifying device in the exhaust passage are provided. A timing for injecting fuel from the reducing agent injection valve is adjusted to match a timing when exhaust gas discharged on an exhaust stroke of each of cylinders of the internal combustion engine reaches the position to which fuel is injected from the reducing agent injection valve. A single injection amount is changed in accordance with a condition of combustion exhaust gas that is discharged on one exhaust stroke of each of the cylinders and reaches the point to inject fuel.12-25-2008
20090107118Composition 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.04-30-2009
20080295492Injector cleaning system based on pressure decay - An injector cleaning system for use with an exhaust treatment device is disclosed. The injector cleaning system may have a supply of injection fluid and an injector configured to receive and inject the injection fluid. The injector cleaning system may also have a pressure sensor associated with the injector to generate a signal indicative of the pressure of the injection fluid supplied to the injector. The injector cleaning system may further have a controller in communication with the injector and the pressure sensor. The controller may be configured to determine a pressure decay rate of injection fluid supplied to the injector during a normal injection event based on the signal. The controller may be further configured to compare the determined pressure decay rate to an expected pressure decay rate, and supply cleaning fluid to the injector based on the comparison.12-04-2008
20080276600Apparatus for Plasma Reaction and System for Reduction of Particulate Materials in Exhaust Gas Using the Same - A reduction system for particulate materials in exhaust gas, which is connected to a tailpipe of an engine that burns a hydrocarbon-based fuel supplied from a fuel storage tank, and collects and removes particulate materials within the exhaust gas, may include a plasma reactor having a gas inlet and an outlet, and a DPF (diesel particulate filter) trap having a filter. The tailpipe of the engine may communicate with the gas inlet of the plasma reactor, and the outlet of the plasma reactor may communicate with the DPF trap. The exhaust gas exhausted from the engine may be transferred to the DPF trap after being heated while passing through the plasma reactor.11-13-2008
20110041480EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust purification apparatus for internal combustion engine having a selective reduction catalyst that while maintaining a high NOx reduction ratio, inhibits any ammonia discharge downstream of the selective reduction catalyst. In the exhaust purification apparatus (02-24-2011
20110041479EXHAUST GAS PURIFICATION METHOD AND EXHAUST GAS PURIFICATION SYSTEM - Disclosed is an exhaust gas purification method, and also disclosed is an exhaust gas purification system (02-24-2011
20110005207CONTROL DEVICE - A control device applied to a system having an engine configured such that an expansion ratio can be changed is characterized to comprise an expansion ratio acquisition part for acquiring the expansion ratio, and a temperature estimation part for estimating a temperature of an exhaust gas discharged from the engine or a member positioned in a passage for the exhaust gas.01-13-2011
20110005206Apparatus for Maintaining a Urea Solution in a Liquid State for Treatment of Diesel Exhaust - A system for keeping a reservoir solution of urea in a liquid state at normally sub-freezing temperatures comprising a reservoir tank module disposed in a solution storage tank. Solution in the storage tank is heated partially by passage of heat through the walls of the reservoir tank module. Additional heat is derived from waste heat in engine exhaust gas and is added to the system by passing a portion of the exhaust gas stream through a gas/liquid heat exchanger disposed within the solution in the storage tank. The cooled gas is returned to the exhaust system or is sent to the engine intake manifold for EGR.01-13-2011
20100319328FUEL INJECTION CONTROL DEVICE - Provided is a fuel injection control device that affords a wider lower limit range of injection amount by a injector for cylinder outside injection, and that can respond to injection requirements over a wider injection amount range. A fuel injection control device includes: a injector 12-23-2010
20100319326METERING DEVICE FOR LIQUID REDUCING AGENT - The invention relates to a metering device for introducing liquid reducing agent into an exhaust gas pipe. The metering device has a working tank with contents, a delivery unit which is connected to the working tank and the delivery direction of which can be reversed, and a metering valve which is connected to the delivery unit. The metering valve is supplied with contents by the delivery unit and is designed to dispense the tank contents in a discharge direction. The metering valve is designed and connected to the delivery unit in such a way that the delivery unit establishes a negative pressure between the delivery unit and the metering valve when the delivery direction is reversed. The negative pressure causes gas to be drawn off through the metering valve against the discharge direction. The invention also relates to a method for operating a metering device for introducing liquid reducing agent into an exhaust gas tract. The method has the steps of providing a delivery unit that is connected to a metering valve and to a working tank, and discharging liquid reducing agent via a metering valve in a discharge direction. The method further has the step of emptying the metering valve by drawing gas into an emptying flow direction, which is the opposite direction from the discharge direction, achieved by operating the delivery unit in the opposite direction to that of the delivery direction.12-23-2010
20100319323Engine aftertreatment system with exhaust lambda control - An aftertreatment device for reducing nitrogen oxides (NOx), particulate matter (PM), hydrocarbon (HC), and carbon monoxide (CO) generated by a compression-ignition (CI) engine. In this device, lean exhaust air generated in the CI engine is converted to rich exhaust air, and energy used for the conversion is recycled using an energy recovery device. The result rich exhaust air then pass through an oxidation catalyst, where NOx is reduced with CO and HC.12-23-2010
20100319324Exhaust Gas Treatment System Including an HC-SCR and Two-way Catalyst and Method of Using the Same - An exhaust gas treatment system for a diesel engine is disclosed. The exhaust gas treatment system includes a hydrocarbon selective catalytic reduction catalyst (HC-SCR) in fluid communication with a diesel engine to receive an exhaust gas flow therefrom. The system also includes a two-way catalyst in fluid communication with the HC-SCR to receive the exhaust gas flow therefrom, the two-way catalyst comprising a urea selective catalytic reduction catalyst and a diesel particulate filter (DPF).12-23-2010
20100319327EXHAUST GAS PURIFICATION DEVICE AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification device has: a bypass passage (12-23-2010
20100319325DEVICE FOR METERING FUEL INTO THE EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - Proposed is a device for metering fuel into the exhaust system of an internal combustion engine. An injection valve is arranged in the exhaust system and is cooled by a flowing cooling liquid even in its closed state. The injection valve is supplied with fuel via a fuel inflow, from which a first partial flow is injected into the exhaust gas and from which a second partial flow is recirculated via a fuel collecting return line into a fuel storage tank. The fuel inflow is fed from a low-pressure system of an injection system which serves for metering fuel for combustions which take place in a combustion chamber of the internal combustion engine. The device has a damping mechanism, which is hydraulically connected to the fuel inflow, for damping pressure oscillations.12-23-2010
20100313550Device for Purification of Exhaust Gases of an Internal Combustion Engine - The invention relates to a device for purification of exhaust gases for the exhaust gas line of an internal combustion engine, with an exhaust gas channel which is made multi-flow in a specified region and has several component exhaust gas lines, and with a metering device by means of which a specified amount of a reducing agent can be metered into the exhaust gas channel in the region upstream from the catalytic converter arrangement at specified times. According to the invention, a metering channel which branches off from the single metering device is assigned to each of the component exhaust gas lines, and a specified proportion of the amount of metered reducing agent can be supplied to each component exhaust gas line via the metering channels.12-16-2010
20110131958SYSTEM AND METHOD FOR MITIGATING POTENTIAL FOR FORMATION OF UREA DEPOSITS IN AN ENGINE EXHAUST SYSTEM DURING COLD AMBIENT CONDITIONS - A device and method for catalytic reduction of NOx in gaseous products of a combustion process before entry into the atmosphere. The gaseous and particulate products of a combustion process flow radially through a radial flow particulate filter element (06-09-2011
20100115926METHOD OF CONTROLLING NOx PURIFICATION SYSTEM AND NOx PURIFICATION SYSTEM - An NOx purification system having a selective reduction catalyst, adapted so that even when no ammonia or urea is supplied, NOx is converted to ammonia by a first catalyst including a lean NOx catalyst or a ternary catalyst at ammonia formation control and the ammonia is adsorbed by the selective reduction catalyst disposed downstream and so that by the adsorbed ammonia, there is carried out reduction purification of the NOx contained in the exhaust gas when no ammonia formation control is performed by the selective reduction catalyst. At the ammonia formation control, an ammonia adsorption target amount being a target value of ammonia adsorbed by the selective reduction catalyst is computed, and the ammonia formation control is carried out only when a cumulative value of an ammonia formation amount formed by the first catalyst at the ammonia formation control is under the ammonia adsorption target amount. Consequently, ammonia is stably supplied in just proportion to the selective reduction catalyst.05-13-2010
20120144807EXHAUST GAS PURIFICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - The present invention is intended to improve a SOx reduction rate which is a ratio of an amount of SOx reduction with respect to an amount of SOx occlusion in SOx poisoning recovery processing. In the present invention, in the SOx poisoning recovery processing in which the SOx occluded in an NOx storage reduction catalyst is reduced by decreasing the air fuel ratio of an exhaust gas flowing into the NOx storage reduction catalyst to a predetermined air fuel ratio in a repeated manner, the length of a period in which the air fuel ratio of an exhaust gas flowing into the NOx storage reduction catalyst is decreased is made longer in a relatively early time during the processing than in a relatively late time during the processing.06-14-2012
20090301065Exhaust system having exhaust system segment with improved catalyst distribution and method - An exhaust system for an internal combustion engine includes an upstream segment and a downstream segment connecting with the upstream segment. The downstream segment is a NOx reducing segment having an exhaust gas outlet and a reductant inlet disposed between the exhaust gas outlet and an exhaust gas inlet for the downstream segment. The upstream segment further includes a coating having a catalyst configured to increase a ratio of NO12-10-2009
20090301066CONTROL OF SELECTIVE CATALYTIC REDUCTION - A method of controlling a rate of introduction of a NO12-10-2009
20090301064UREA PUMP ASSEMBLY FOR AN EXHAUST GAS TREATMENT SYSTEM - Exemplary embodiments of the present invention are directed towards improved systems and methods for the delivery of urea to an exhaust gas treatment system. In one exemplary embodiment, a urea pump assembly for an exhaust treatment system is provided. The pump assembly includes a housing comprising: a housing chamber, a first fluid inlet and a first fluid outlet, the first fluid inlet being in fluid communication with the first fluid outlet through a first conduit. The housing also comprises a second fluid inlet and a second fluid outlet, the second fluid inlet being in fluid communication with the second fluid outlet through a second flexible conduit. The second flexible conduit is located within a portion of the housing chamber and in thermal communication with the first conduit. The pump assembly also includes a pump located within the housing chamber, the pump being engaged with the second conduit and configured to move fluid between the second fluid inlet and the second fluid outlet.12-10-2009
20090301063EXHAUST GAS PURIFICATION DEVICE - An ECU corrects a fuel addition interval, based on an amount of change between an exhaust gas temperature at present and a basic exhaust gas temperature obtained when a basic addition interval is set, to reduce the fuel addition interval with an increase in the amount of change in the exhaust gas temperature (steps ST12-10-2009
20090293460ENGINE EXHAUST EMISSION PURIFICATION APPARATUS - An engine exhaust emission purification apparatus for reducing and purifying NOx in the exhaust emission by using a liquid reducing agent having a temperature maintenance device for maintaining a temperature of at least a part of a liquid reducing agent supply system configured by an injection nozzle and piping of the injection nozzle at a temperature lower than a boiling point of a solvent of the liquid reducing agent or equal to or higher than a melting point of dissolved matter in which the liquid reducing agent existing in the liquid reducing agent supply system conducts heat exchange with the liquid reducing agent supply system thereby being maintained at a temperature lower than the boiling point of the solvent or equal to or higher than the melting point of the dissolved matter and resultantly, occurrence of precipitation of the dissolved matter due to evaporation of only the solvent in the liquid reducing agent supply system does not occur, and even if precipitation of the dissolved matter occurs, the dissolved matter per se is melt away to prevent an injection hole of the injection nozzle from being clogged.12-03-2009
20090293454EXHAUST EMISSION CONTROL DEVICE - In an exhaust emission control device with NO12-03-2009
20090293459EXHAUST GAS PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU calculates ammonia adsorption quantity of the SCR catalyst and controls urea solution addition quantity, which is added by the urea solution addition valve, based on the ammonia adsorption quantity. The ECU obtains temperature of the SCR catalyst or temperature information correlated with the temperature through measurement or estimation. The ECU switches an execution mode of the urea solution addition control based on the catalyst temperature or the temperature information. Thus, reducing agent addition control can be performed suitably and eventually NOx purification in a NOx catalyst (i.e., SCR catalyst) can be performed suitably.12-03-2009
20090293458EXHAUST GAS POST-PROCESSING APPARATUS AND REGENERATION METHOD THEREOF - An exhaust gas post-processing apparatus may include an exhaust pipe through which exhaust gas passes, a particulate material catalyst (PMC) that is mounted in the exhaust pipe, that collects particulate materials included in the exhaust gas, and that is regenerated by NO2, and a control portion that increases amount of NOx supplied from an engine so as to increase amount of NO2 supplied to the PMC to improve regeneration efficiency of the PMC for a predetermined time period according to driving conditions of a vehicle.12-03-2009
20090293457System and method for controlling NOx reactant supply - A method is provided for a selective catalytic reduction (SCR) system for reducing a pollutant emission level in exhaust gas of an engine on a machine. The method may include providing a plurality of virtual sensors each having a model type, at least one input parameter, and at least one output parameter. The plurality of virtual sensors may include a first virtual sensor for measuring an emission level of a first component the pollutant and a second virtual sensor for measuring an emission level of a second component the pollutant. The method may also include integrating the plurality of virtual sensors into a virtual sensor network; operating the virtual sensor network to provide the first component emission level and the second component emission level; and calculating a ratio between the first component and the second component based on the first component emission level and the second component emission level. Further, the method may include determining a reactant injection rate of a reactant of the SCR system based on the ratio; and controlling the SCR system to apply the reactant at the reactant injection rate to reduce the pollutant emission level to a desired range.12-03-2009
20090293456Exhaust system having regeneration temperature control 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, a particulate filter located within the exhaust passage, and a heating device located to selectively warm the flow of exhaust passing through the particulate filter. The exhaust system may also have a controller in communication with the combustion engine and the heating device. The controller may be configured to continuously determine an amount of particulate matter within the particulate filter, continuously determine a desired regeneration temperature based on the amount of particulate matter, and continuously determine an error value as a function of the desired regeneration temperature and an actual regeneration temperature. The controller may be further configured to determine an amount of particulate matter within the particulate filter, and adjust an amount of warming provided by the heating device based on the error value.12-03-2009
20090293455Exhaust system implementing low-temperature regeneration strategy - An exhaust control system for use with a combustion engine is disclosed. The exhaust control system may have an exhaust passage configured to receive a flow of exhaust from the combustion engine, a particulate filter located within the exhaust passage, and an oxidation catalyst located upstream of the filter. The oxidation catalyst may be configured to promote regeneration of the particulate filter and may have an activation temperature range. The exhaust control system may also have a heating device located to selectively warm the oxidation catalyst to within the activation temperature range, and a controller in communication with the combustion engine and the heating device. The controller may be configured to detect a loading of the particulate filter exceeding a first loaded threshold amount, and to detect a low temperature condition of the combustion engine. The controller may further be configured to activate the heating device to warm the oxidation catalyst when the loading of the particulate filter exceeds the first loaded threshold amount during the low temperature condition and until the loading of the particulate filter is reduced below a second loaded threshold amount.12-03-2009
20110185708Adaptive Desulfation Control Algorithm - The exhaust from a diesel-fueled internal combustion engine is treated by a lean NO08-04-2011
20110258990EXHAUST GAS CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - An exhaust gas control device of an internal combustion engine has an exhaust treatment device that purifies an exhaust gas. The exhaust gas control device is formed such that unburned fuel is supplied into the exhaust gas by a fuel addition valve, and the unburned fuel is ignited by a glow plug, to generate thereby a flame that reaches an upstream end of an exhaust treatment device. The unburned fuel is caused to become adhered to the upstream end of the exhaust treatment device before a generated flame reaches the exhaust treatment device. Then, the unburned fuel adhered to the upstream end of the exhaust treatment device burns by the flame.10-27-2011
20110258989EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust purification apparatus for an internal combustion engine according to the present invention includes a heated gas generation apparatus configured to generate heated gas utilizing exhaust gas flowing through an exhaust passage. The heated gas generation apparatus includes a catalyst configured to provide an oxidation function, a fuel supply nozzle, and a heater. An exhaust purification unit is provided downstream of the heated gas generation apparatus. An incoming gas temperature of the exhaust purification unit is detected and estimated. An actual incoming gas temperature being a detected value and an estimated incoming gas temperature both acquired when at least the fuel supply nozzle is actuated are compared with each other. Based on the result of the comparison, the apparatus detects one of poisoning of the catalyst with HC and degradation of the catalyst. Thus, the heated gas generation apparatus is prevented from discharging HC.10-27-2011
20100031640EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO02-11-2010
20100031641EXHAUST PURIFICATION DEVICE OF AN INTERNAL COMBUSTION ENGINE - An internal combustion engine, in which an NO02-11-2010
20100031637RAPID HEATER FOR EMISSION CONTROL DEVICE - An emission control device having a catalyst matrix, a microwave heater and a microwave energy reflective sleeve which substantially surrounds an outer surface of the matrix is provided. In one example, power is supplied to the microwave generator only as long as the temperature of the catalyst matrix is less than the activation temperature of the emission control reactions. The microwave energy reflective sleeve may reflect and confine substantially all of a microwave energy received from a microwave generator and waveguide, improving the operability of the emission control device and reducing the light-off time of the emission control reactions.02-11-2010
20100018187INTERNAL COMBUSTION ENGINE CONTROL DEVICE - An internal combustion engine control device includes a NOx adsorber catalyst disposed in an exhaust passage, an EGR passage, a reducing agent adding device, a torque fluctuation reducing device, and a fuel injection device. The EGR passage draws a portion of exhaust gas from the exhaust passage downstream of the NOx adsorber catalyst and recirculates the exhaust gas into the intake passage. The reducing agent adding device adds a reducing agent to exhaust gas upstream of the NOx adsorber catalyst to reduce substances adsorbed by the NOx adsorber catalyst. When or after the reducing agent adding device adds the reducing agent, the torque fluctuation reducing device advances the timing of the fuel injection device or carries out a pilot injection to reduce a fluctuation in engine torque. The reducing agent adding device adds less reducing agent while the torque fluctuation reducing device is operating.01-28-2010
20100101215EXHAUST GAS TREATMENT SYSTEM AND METHODS FOR OPERATING THE SAME - An exhaust gas treatment system includes a selective catalytic reduction (SCR) catalyst and a dosing control responsive to exhaust gas operating conditions for controlling the dosing rate of a reductant such as aqueous urea into the exhaust stream. The dosing control is configured to reduce the dosing rate when either a sudden increase in the exhaust mass air flow is detected or when an exhaust gas temperature gradient is in an increasing state. The dosing control is also configured to shut-off dosing when a measured ammonia concentration level exceeds an ammonia slip trip level, provided that the exhaust gas temperature gradient is also in an increasing state.04-29-2010
20090301067REAGENT DOSING SYSTEM AND METHOD OF DOSING REAGENT - A method of dosing a reagent into an exhaust gas stream of an internal combustion engine having an SCR catalyst, the method comprising injecting reagent from a reagent tank into the exhaust gas stream at a position upstream of the SCR catalyst using a reagent injector in accordance with a first dosing schedule in order to remediate a predetermined proportion of NOx in the exhaust gas stream, the first dosing schedule being associated with a first range of engine operating conditions; and injecting reagent from the reagent tank into the exhaust gas stream at a position upstream of the SCR catalyst using a reagent injector in accordance with a second dosing schedule in order to enable heat transfer between the reagent injector and said injected reagent, the second dosing schedule being associated with a second range of engine operating conditions.12-10-2009
20100242448EXHAUST 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 includes a four-way catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom, the four-way catalyst comprising a lean nitrogen oxides (NO09-30-2010
20110000194SELECTIVE CATALYTIC REDUCTION SYSTEM USING ELECTRICALLY HEATED CATALYST - An exhaust system includes N heating elements and a particulate matter (PM) filter. The N heating elements heat N portions of an exhaust gas. At least one of the N heating elements is coated with a first selective catalytic reduction (SCR) catalyst. The PM filter has an inlet that receives the N portions of the exhaust gas heated by the N heating elements. Each of the N portions of the exhaust gas heats a corresponding region of the inlet. N is an integer greater than 1.01-06-2011
20080245058Closed loop control of exhaust system fluid dosing - An exhaust line fuel injection system and associated methods of operation and control are disclosed. The fuel passes through a regulating valve connected to a pressurized fuel source and an outlet connected to an exhaust system fuel supply line. The exhaust system fuel supply line is connected to a nozzle, which generally comprises a check-valve and is configured to inject the fuel into the exhaust line. Using a pressure measuring device, an indication of the exhaust system fuel supply line pressure is obtained. A controller provides control over the flow regulating valve using feedback from the pressure indication and a predetermined relationship between the flow rate through the nozzle and one of the exhaust system fuel supply line pressure and the pressure drop across the nozzle. The method can be implemented with a single pressure measuring device. The same pressure measurements, especially their frequency spectrum, can be used to detect system faults.10-09-2008
20090044518SULPHUR OXIDE (SOX) REMOVAL METHOD AND SYSTEM AND CONTROLLER FOR SAID SYSTEM - This system for the elimination of SOx (Sulphur Oxide) stored in a NOx (02-19-2009
20120036840NOx Storage and Reduction Catalyst, Preparation Method, and NOx Removing System - A catalyst for NOx storage and reduction may include a carrier that contains alkali metal and Al, or alkali earth metal and Al, a NOx storage element of alkali metal, alkali earth metal or rare earth element, and one or more noble metals that are selected from the group consisting of Pt, Pd, Ru, Ag, Au and Rh. The catalyst for NOx storage and reduction shows excellent NOx storage and reduction capability, maintains excellent storage and reduction capability especially before and after deterioration and sulfation, and shows excellent catalytic activity under low temperature environment, while maintaining unusually high hydrophobicity.02-16-2012
20120036839VEHICLE OXIDATION CATALYST EFFICIENCY MODEL FOR ADAPTIVE CONTROL AND DIAGNOSTICS - A vehicle includes a fuel tank, an internal combustion engine, an oxidation catalyst, a regenerable particulate filter in fluid communication with an outlet side of the oxidation catalyst, and a host machine. The host machine calculates an actual hydrocarbon level in the exhaust stream downstream of the particulate filter as a function of an actual energy input value and an actual output value of the oxidation catalyst, and subsequently executes a control action using the actual hydrocarbon level. A method for use aboard the vehicle includes using the host machine to calculate an actual hydrocarbon level in the exhaust stream downstream of the particulate filter, including solving a function of an actual energy input value and an actual energy output value of the oxidation catalyst, and executing a control action aboard the vehicle via the host machine using the actual hydrocarbon level.02-16-2012
20100031639System for Controlling Urea Injection Quantity of Vehicle and Method Thereof - A system for controlling urea injection quantity of a vehicle, may include an SCR device, the SCR device purifying NOx, a pump configured to supply the SCR device with a urea solution of a urea tank through a urea supply line, a dosing injector disposed on the exhaust pipe at upstream side of the SCR device and injecting the urea solution, and a control portion that closes the dosing injector not to exhaust the urea solution that is charged in the urea supply line if operation of the engine is stopped and outside temperature is higher than a predetermined base temperature, and that stops the pump and opens the dosing injector to exhaust the urea solution charged in the urea supply line to the urea tank if operation of the engine is stopped and the outside temperature is equal to or lower than the predetermined base temperature.02-11-2010
20120304627ELECTRONICALLY HEATED HYDROCARBON (HC) ADSORBER - An exhaust gas treatment system is provided, having an internal combustion engine, an exhaust gas conduit, an electrically heated catalyst (“EHC”) device, an oxidization catalyst (“OC”) device, an OC temperature sensor, a hydrocarbon (“HC”) adsorber, and a control module. The hydrocarbon supply is selectively activated for delivery of a hydrocarbon and formation of an exhaust gas and hydrocarbon mixture therein. The EHC device is selectively activated to produce heat and induce oxidization. The OC device is in fluid communication with the exhaust gas conduit and located downstream of the EHC device. The OC temperature sensor is in fluid communication with the exhaust gas conduit and located downstream of the OC device. The HC adsorber is located downstream of the EHC device. The control module is in communication with the hydrocarbon supply, the EHC device, the OC device, the OC temperature sensor, and the HC adsorber.12-06-2012
20120000189ADAPTIVE CONTROL OF SCR UREA INJECTION TO COMPENSATE ERRORS - A method for controlling a selective catalytic reduction injection system having a storage tank, a pump, a delivery line, and an injection nozzle includes monitoring the selective catalytic reduction injection system, determining a selective catalytic reduction injector system effective area ratio, comparing the selective catalytic reduction injector system effective area ratio to a threshold, calculating a compensation factor upon surpassing the threshold, and modifying the commanded injected mass according to the calculated compensation factor.01-05-2012
20090260348Method for Controlling Desulfurization In Exhaust Gas Purification System, and Exhaust Gas Purification System - This invention provides an exhaust gas purification system (10-22-2009
20090000277Exhaust Gas Purification Apparatus For Internal Combustion Engine - A fuel addition valve that adds fuel into the exhaust gas passage of the engine in the form of fine fuel droplets, an upstream NOx adsorption-reduction catalyst, and a downstream NOx adsorption-reduction catalyst are arranged in this order. Platinum Pt and palladium Pd, as noble metal, are supported on the downstream NOx adsorption-reduction NOx catalyst such that the ratio of the mole number of the platinum Pt to the sum of the mole numbers of the platinum Pt and the palladium Pd is approx. 50% to approx. 80%. Only platinum Pt is supported on the upstream NOx adsorption-reduction catalyst. According to this structure, even when liquid fuel is supplied into exhaust gas, NOx can be effectively released from the NOx adsorption-reduction catalyst, and further the amount of NOx that the NOx adsorption-reduction catalyst can adsorb at a low temperature increases.01-01-2009
20110047981CATALYST TEMPERATURE CONTROL SYSTEMS AND METHODS FOR HYBRID VEHICLES - A catalyst temperature control system of the present disclosure includes a vehicle start anticipation module and an electrically heated catalyst (EHC) control module. The vehicle start anticipation module determines whether a vehicle start is anticipated based on at least one of a plurality of vehicle conditions before an ignition switch is turned on. The EHC control module activates an EHC based on the determination.03-03-2011
20120006010INJECTOR CONTROL FOR A SELECTIVE CATALYTIC REDUCTION SYSTEM - Systems and methods are provided for controlling the amount and timing of nitrogen oxides reductant injected during a given injection cycle into an exhaust system of a vehicle as part of a selective catalytic reduction system. The amount of reductant injected is determined by at least one computational model that accounts for the growth of liquid and/or solid reductant film growth on the interior of the exhaust system. The model determines reductant injection characteristics (e.g., amount, timing, etc.) that reduce and/or eliminate reductant films on the interior of the exhaust system. Exemplary inputs into the model include exhaust temperature, exhaust flow, and the amount of reductant injected in a previous injection cycle.01-12-2012
20090165442Method for Controlling Exhaust Gas Purification System - An exhaust gas purification system (07-02-2009
20120055139Sensor for Detecting the Amount of a Reducing Agent and the Amount of a Pollutant in an Exhaust Gas - A system assembly detects the amount of reducing agent and the amount of pollutant in an exhaust gas. The system assembly has a first pollutant sensor, which is cross-sensitive to the reducing agent, and is provided for emitting a first measuring signal proportional to the amount of pollutant in the exhaust gas for use in front of a filtering device for the selective reducing of the reducing agent or the pollutant in the exhaust gas. A second pollutant sensor, which is also cross-sensitive to the reducing agent, emits a second measuring signal proportional to the amount of pollutant in the exhaust gas for use behind the filtering device.03-08-2012
20100326055METHOD AND APPARATUS FOR REGENERATING A CATALYZED DIESEL PARTICULATE FILTER (DPF) VIA ACTIVE NO2-BASED REGENERATION WITH ENHANCED EFFECTIVE NO2 SUPPLY - In a method for regenerating s catalyzed diesel particulate filter (DPF) via active NO2-based regeneration with enhanced effective NO2 supply, a NOx containing gas is introduced into the DPF, and a temperature of at least one of the DPF, the NOx containing gas, and soot in the DPF is controlled while control Sing NOx levels at an inlet of the DflF so that the NOx containing gas reacts with the catalyst to form N 02 molecules that thereafter react with soot particles to form CO, CO2, and NO molecules and a N02 efficiency is greater than 0.52 gC/gNO2 and so that less than two thirds of the soot mass that is removed from the DPF is oxidized by 02 molecules in the gas to form CO and CO2 molecules.12-30-2010
20090077949PROCEDURE FOR OPERATING A REDUCING AGENT METERING VALVE OF A SCR-EXHAUST GAS PURIFYING SYSTEM - A procedure for dosing a reducing agent into the exhaust gas of an combustion engine with a valve is presented, which shows a solenoid and a movable seal body for adjusting a percolation profile, whose value is depending on the current through the solenoid, whereby the valve is triggered by a current profile, which shows two consecutive sectors. The procedure distinguishes itself in that it is checked in the first sector whether the valve is frozen or whether a danger of freezing exists, and that an electric energy that has been fed into the solenoid with the electric current is set in the second sector depending on the result of the checking. Furthermore a controller is introduced, which is customized for controlling the process of such a procedure.03-26-2009
20100024401EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust pipe is provided with a SCR catalyst (NOx catalyst) and an oxidation catalyst. A urea water adding valve and an exhaust gas temperature sensor are provided upstream of the SCR catalyst. A downstream NOx sensor is provided downstream of the SCR catalyst. The oxidation catalyst is provided with a catalyst temperature sensor. An ECU computes a temperature of the oxidation catalyst based on a detection value of the catalyst temperature sensor. Further, the ECU computes a temperature of exhaust gas flowing into the oxidation catalyst based on a detection value of the exhaust gas temperature sensor. The ECU detects ammonia flowing out from the SCR catalyst based on a differential temperature between the temperature of the catalyst and the temperature of the exhaust gas.02-04-2010
20120060480EXHAUST GAS PURIFIYING APPARATUS IN INTERNAL COMBUSTION ENGINE - The present invention provides an exhaust gas purifying apparatus in an internal combustion engine comprising an oxidation accelerator (R03-15-2012
20120060481VEHICLE CONTROL DEVICE - A vehicle control device applied to a vehicle including an internal combustion engine and an electrically heated catalyst which is warmed by applying a current, and includes a catalyst carrier supporting a catalyst and a carrier retention unit that retains the catalyst carrier and has an electrical insulation property. The control unit performs a control of suppressing a supply of an unburned gas from the internal combustion engine to the electrically heated catalyst so that the carrier retention unit is maintained at a lower temperature than the catalyst, when a condition for performing a fuel cut of the internal combustion engine during a deceleration is satisfied. Therefore, it is possible to suppress a rapid cooling of the catalyst, and it becomes possible to maintain a temperature of the carrier retention unit at a lower temperature than a temperature of the catalyst.03-15-2012
20120151901FUEL ADDITION CONTROL METHOD APPLIED TO EXHAUST EMISSION PURIFIER OF INTERNAL COMBUSTION ENGINE AND EXHAUST EMISSION PURIFIER - An exhaust emission purifier is provided and able to suppress overheating of an exhaust emission purifying catalyst and execute fuel addition promptly when fuel addition to the exhaust emission purifying catalyst is requested. In the exhaust emission purifier of an internal combustion engine, exhaust purifying cycles are repeated in order that the exhaust emission purifying catalyst is to be regulated at a target temperature, the cycle being a combination of an addition period during which fuel is added from the fuel addition valve and a halt period during which fuel addition is halted, and the fuel addition valve is manipulated such that the halt period is disposed so as to sandwich the addition period in the cycle.06-21-2012
20080314030Method for Operating a Nitrogen Oxide Storage Catalytic Converter in a Motor Vechicle with Consideration of Regional Fuel Qualities - The fuel qualities for vehicles differ, for example, in Europe on a regional basis. This applies in particular to the sulphur content of the fuel. If vehicles with modern lean engines or with diesel engines which are equipped with nitrogen oxide storage-type catalytic converters in order to reduce the nitrogen oxide content in their exhaust gas pass through regions with a sulphur content in the fuel which is above the sulphur content which is specified for the vehicle, the engine controller will correspondingly frequently initiate desulphurization of the storage-type catalytic converter after the vehicle has been refuelled with this fuel. Any desulphurization entails an increased level of fuel consumption and greater ageing of the catalytic converter. It is proposed to avoid these adverse effects in that in lean motors the engine controller switches to stoichiometric operation in such a case, and in a diesel engine said engine controller prevents the desulphurization. The information about the region in which the vehicle is moving at a particular time can be transmitted to the engine controller by a navigation system.12-25-2008
20090145117Exhaust gas aftertreatment system - Exhaust gas aftertreatment system for internal combustion engines operated with a lean mixture, wherein nitrogen oxides are reduced by an SCR catalyst, and particulates are removed by a particle separator or filter. A thermolysis catalyst is located near the engine in the exhaust gas split stream downstream of the supply point of the reducing agent. At temperatures above 135° C., this thermolysis catalyst vaporizes the water component of the aqueous urea solution. It contains a catalyst material that is thermally stable at exhaust gas temperatures occurring near the engine and preferentially reacts with the urea to form isocyanic acid. A hydrolysis catalyst is located in the exhaust gas stream downstream of the return of the split stream into the main stream of exhaust gas. The hydrolysis catalyst converts the isocyanic acid formed during thermolysis to ammonia and carbon dioxide using water vapor formed in the thermolysis catalyst.06-11-2009
20100095654PROCEDURE FOR OPERATING AN INTERNAL COMBUSTION ENGINE AND DEVICE FOR THE EXECUTION OF THE PROCEDURE - Suggested is a procedure for operating a combustion engine (04-22-2010
20100095653SYSTEM AND METHOD FOR HEATING A REDUCING AGENT ASSOCIATED WITH A REDUCING AGENT DISTRIBUTION SYSTEM - A system for heating a reducing agent associated with a reducing agent distribution system. The system may include a reducing agent containment device, a distribution device connected to the reducing agent containment device, and at least one heating component associated with the reducing agent containment device. A temperature sensor may be configured to determine a temperature of the reducing agent and may be disposed at least partially within the reducing agent containment device. A pressure sensor may be associated with the distribution device and configured to determine a pressure characteristic of the system. A controller may be configured to receive input from the temperature sensor and the pressure sensor and configured to send input to the at least one heating component based on the input received from the temperature sensor and the pressure sensor.04-22-2010
20120137662METHOD FOR PREDICTING SOX STORED AT DENOX CATALYST AND EXHAUST SYSTEM USING THE SAME - A method for predicting sulfur oxides (SOx) stored at a denitrification (DeNOx) catalyst may include calculations of the mass flow of SOx poisoned at the DeNOx catalyst, the mass flow of SOx released from the DeNOx catalyst, and the SOx amount poisoned at the DeNOx catalyst by integrating the value obtained by subtracting the released mass flow of SOx from the poisoned mass flow of SOx. An exhaust system using the method may comprise an engine having a first injector, an exhaust pipe, a second injector mounted at the exhaust pipe and injecting a reducing agent, a DeNOx catalyst mounted at the exhaust pipe and reducing SOx or nitrogen oxides (NOx) or both contained in the exhaust gas by using the reducing agent, and a control portion electrically connected to the system and performing the calculations and controls.06-07-2012
20090133388Exhaust gas purification apparatus and exhaust gas purification method - An exhaust gas purification apparatus which is installed in a flow channel of an exhaust gas discharged from an engine, includes: a first purification device that purifies one component contained in the gas; a heating device that heats the purification device to a predetermined temperature in a period from before the engine is started to a first point in time that is after the engine is started; control device that controls an air-fuel ratio of the gas so as to obtain a air-fuel ratio suitable for purifying the one component in a period from the time when the engine is started to a point in time that is on or after a time at which the purification device is heated to the predetermined temperature; and an adsorption device that communicates with the downstream of the first purification device and adsorbs another component contained in the gas.05-28-2009
20090133386PROCEDURE AND CONTROL UNIT FOR HEATING UP A CATALYST ARRANGED IN THE EXHAUST GAS SYSTEM OF A SUPERCHARGED COMBUSTION ENGINE - Suggested is a procedure for heating up a catalyst in the exhaust gas system of a charged combustion engine by adding air to the exhaust gas system, whereby the added air is taken from a suction system of the combustion engine in the direction of the air current behind a compressor of an exhaust gas turbo charger that is arranged in the suction system. The procedure distinguishes itself thereby that the combustion engine is driven with a direct injection of fuel in its combustion chambers, whereby it is driven after a start-up with an apportionment of a fuel amount, which has to be injected before the beginning of a combustion, into at least two partial injections per ignition, and with a suboptimal ignition angle efficiency. A second independent claim concerns a control unit, which is customized for controlling the course of the procedure.05-28-2009
20120124971EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside an engine exhaust passage, in order from the upstream side, a hydrocarbon feed valve, oxidation catalyst, and exhaust purification catalyst are arranged. A first NO05-24-2012
20120124972EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE AND NOx PURIFICATION CATALYST DETERIORATION DETERMINATION METHOD - An exhaust emission control device includes a NOx purification catalyst, a three-way catalyst provided upstream of the NOx purification catalyst, a first air-fuel ratio sensor provided upstream of the three-way catalyst, a second air-fuel ratio provided downstream of the NOx purification catalyst, a rich spike unit for changing an exhaust gas air-fuel ratio from lean to rich for a predetermined period to reduce and purify NOx adsorbed by the NOx purification catalyst, a first detection unit for detecting a NOx adsorption amount and an oxygen storage amount of the three-way catalyst and the NOx purification catalyst during rich spike, a second detection unit for detecting the oxygen storage amount of the three-way catalyst and the NOx purification catalyst until the output of the second air-fuel sensor becomes lean after the rich spike, and a deterioration determination unit for determining deterioration of the NOx purification catalyst based on a detected value of the first detection unit and that of the second detection unit.05-24-2012
20120124970METHOD FOR PREDICTING NOx AMOUNT AMD EXHAUST SYSTEM USING THE SAME - A method for predicting a NOx amount may include detecting an O2 amount in an intake air, calculating a reference O2 amount in the intake air according to a driving condition of an engine, calculating a reference NOx amount contained in an exhaust gas according to the driving condition of the engine, and primarily correcting the reference NOx amount based on the detected O2 amount in the intake air and the reference O2 amount in the intake air according to the driving condition of the engine.05-24-2012
20100223914Method For Adjusting the Metered Additions of Reducing Agent For Selective Catalytic Reduction - A method for use 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 operating 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, determines, by comparison of a value proportional to the nominal emission or the nominal conversion stored in the control unit of the internal combustion engine for the associated operating point of the internal combustion engine and/or of the exhaust gas post-treatment system with a value proportional to the actual emission or the actual conversion metrologically determined by the control unit.09-09-2010
20100205943ELECTRICALLY HEATED PARTICULATE FILTER ZONE-BASED POST FUEL INJECTION SYSTEM - A system includes a particulate matter (PM) filter with multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module selects one of the zones, adjusts post fuel injection based on the selected one of the zones, and electrically heats the one of the zones via a respective one of the heater segments.08-19-2010
20090126348Metering Valve Assembly and Method for Operating a Metering Valve Assembly - A metering valve assembly having a metering valve for metering an aqueous urea solution for posttreatment of exhaust gases from internal combustion engines, the liquid being capable of being fed in a feeding direction to the metering valve and a mixing chamber being provided, in which the liquid is miscible with a gas in a gas flow. The metering valve is evacuatable contrary to the feeding direction.05-21-2009
20100050612PROCEDURE AND DEVICE FOR THE INCREASE IN VALUE OF ONE DOSE ARRANGEMENT - The invention concerns a procedure for controlling a metering device for metering fuel into the exhaust gas duct of a combustion engine for the regeneration of a particle filter, whereby the metering device supplies the fuel to the exhaust gas duct over a security valve, a first fuel pipe, a metering valve, a second fuel pipe and an injection check valve and whereby the pressure of the fuel is determined between the metering valve and the injection check valve in the second fuel pipe. It is thereby provided that an opening pressure of the injection check valve is determined from the pressure course between the metering valve and the injection check valve.03-04-2010
20090126349EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device reduces nitrogen oxide included in exhaust air from an internal combustion engine. The device includes an exhaust pipe, a catalyst, a supply device, a tank, and a temperature regulating device. The exhaust pipe defines a passage for exhaust air discharged from the engine. The catalyst is disposed in the exhaust pipe. The catalyst is capable of promoting reduction reaction of the nitrogen oxide in exhaust air. The supply device is for supplying a fluid-state additive agent, which is used for the reduction reaction, to an upstream side of the catalyst in a flow direction of exhaust air. The additive agent is stored in the tank. The temperature regulating device is for regulating temperature of the additive agent, which is supplied by the supply device, to be in a predetermined range.05-21-2009
20090107119Method and system of thermal management in an exhaust system - A method for treating a flow of exhaust from an engine includes injecting reductant into the flow of exhaust with an injector disposed upstream from a catalytic device. The injector and the catalytic device are disposed in an exhaust system for the engine. The method also includes passing the flow of exhaust through the catalytic device, sensing a characteristic of at least one of the exhaust system and the engine, monitoring the sensed characteristic to recognize a condition associated with a formation of a decomposition material formed from the reductant, and controlling an operation of at least one of the engine and the exhaust system to increase a temperature in the exhaust system in response to the recognized condition.04-30-2009
20100018188EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device has a particulate filter 01-28-2010
20100011749EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to provide an exhaust gas purifying apparatus for an internal combustion engine which can successfully achieve a good balance between reduction of exhaust emission and removal of particulate matter PM. An upstream side three-way catalyst 01-21-2010
20100011748PARTICULATE FILTER REGENERATION APPARATUS AND METHOD OF OPERATING THE SAME - The particulate filter regeneration apparatus includes a driving function for driving an exhaust pipe injector to inject fuel into an exhaust pipe of an internal combustion engine by energizing an actuator of the exhaust pipe injector in order to regenerate a particulate filter provided in the exhaust pipe for collecting particulate matter contained in exhaust gas of the engine, a shutoff function for shutting off fuel supply to the exhaust pipe injector, and a diagnosis function of performing a diagnostic process in which the fuel shutoff function is caused to shut off fuel supply to the exhaust pipe injector, and the driving function is caused to energize the actuator in a state of fuel supply to the exhaust pipe injector being shut off by the shutoff function in order to make a determination whether the actuator is energized normally by the driving function.01-21-2010
20100011747METHOD FOR MODIFYING AIR PROVIDED FOR REGENERATION - A method for regenerating a filtering device is disclosed. The method may include creating a flow of exhaust with a power source and providing air to a combustion device configured to heat the flow of exhaust. The method may also include determining if a parameter is above a threshold. The parameter may be indicative of an amount of air provided to the combustion device. The method may further include modifying an operating condition of the power source if the parameter is above the threshold, where modifying the operating condition affects the parameter.01-21-2010
20090038292Dosing Pump Assembly - A metering pump assembly for admixing a fluid reduction agent from a supply container and a pressurized air flow into an exhaust gas flow of a combustion engine includes an assembly housing and a pre-mixer at least partially within the housing. A membrane pump within the housing is fluidly connected between the supply container and the pre-mixer. An electric motor generates a rotational output. A transmission converts the rotational output of the electric motor into translatory movement. The translatory movement drives the membrane pump to pump the reduction agent from the supply container into the pre-mixer. The pressurized air flow is in fluid communication with the pre-mixer and mixes with the reduction agent within the pre-mixer to form a reduction agent air mixture. An exit conduit fluidly connects the pre-mixer to the exhaust gas flow. The reduction air mixture is delivered through the exit conduit and into the exhaust gas flow.02-12-2009
20090071131EXHAUST SYSTEM COMPRISING CATALYSED SOOT FILTER - An exhaust system comprises: (a) a catalysed soot filter (CSF); (b) a control unit; (c) means, controllable by the control unit, for increasing a content of combustible hydrocarbon (HC) and/or carbon monoxide (CO) in an exhaust gas flowing into the CSF thereby to combust the HC and/or CO in the CSF, to increase the temperature of the CSF and to combust particulate matter collected thereon; and (d) catalysed sensor means disposed between an engine manifold and the CSF for combusting CO and/or HC in exhaust gas flowing in the exhaust system and inputting the control unit with a datum correlating with an enthalpy of combustion of HC and/or CO in the exhaust gas, whereby the control unit, when in use, controls the combustible HC and/or CO introducing means in response to the datum input thereby to control the rate of contacting the CSF with combustible HC and/or CO.03-19-2009
20120255285ELECTRONICALLY HEATED SELECTIVE CATALYTIC REDUCTION (SCR) DEVICE - An exhaust gas treatment system is provided having an internal combustion engine, an exhaust gas conduit, a passive selective catalyst reduction (SCR) device, a heated SCR device, 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 passive SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The passive SCR includes a passive SCR temperature profile. The heated SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The heated SCR device is located upstream of the passive SCR. The heated SCR is selectively activated to produce heat. The control module is in communication with the heated SCR and the engine and includes a control logic for determining the passive SCR temperature profile.10-11-2012
20090241517Exhaust system implementing temperature-constraining regeneration strategy - An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage, a particulate filter located within the exhaust passage, and a heating device located to selectively heat matter collected within the particulate filter. The exhaust system may also have a controller configured to determine an amount of matter collected within the particulate filter exceeding a threshold amount, and to activate the heating device in a first operating mode to regenerate the particulate filter based on the amount of collected matter. The controller may be further configured to detect a temperature constraining condition of the combustion engine, to determine an amount of oxygen within the flow of exhaust during the temperature constraining condition, and to activate the heating device in a second operating mode to constrain a regeneration temperature of the particulate filter based on the amount of oxygen within the flow of exhaust.10-01-2009
20120227386INTERNAL COMBUSTION ENGINE - An internal combustion engine includes an exhaust treatment apparatus provided in an exhaust passage and a burner apparatus provided upstream of the exhaust treatment apparatus. The burner apparatus includes a fuel addition valve which adds fuel into the exhaust passage, heating means for heating the fuel added by the fuel addition valve, and a small-sized oxidation catalyst provided in the exhaust passage downstream of the heating means. The amount of fuel added by the fuel addition valve per predetermined unit time is controlled to control the position of an ignition point where the added fuel is ignited. Thus, the small-sized oxidation catalyst and the exhaust treatment apparatus can be efficiently warmed up.09-13-2012
20080302090Exhaust purification device of internal combustion engine12-11-2008
20080302088Exhaust Injector Spray Target - A system for treating exhaust gasses from an engine is described. The system includes, the exhaust gasses routed from the engine to atmosphere through an exhaust passage, an injector directing a spray of reductant into exhaust gasses against a flow of exhaust gasses, a spray target, the spray target having a front and rear surface, where the front surface is convex and generally facing a direction opposite of exhaust flow, the spray target positioned in the exhaust passage such that injected reductant impinges on the rear surface of the spray target to increase reductant vaporization, an oxidation catalyst positioned upstream of the injector and upstream of the spray target; and a selective catalytic reduction catalyst positioned downstream of the injector and downstream of the spray target.12-11-2008
20110120098EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A technique is provided that can complete reduction and release of SOx from a storage-reduction type NOx catalyst in a shorter period of time in a SOx regeneration treatment of bringing an air-fuel ratio and temperature in the storage-reduction type NOx catalyst to a state where the reduction and release of the SOx is possible by alternately executing rich burn in which burning in a cylinder of an internal combustion engine is performed at a rich air-fuel ratio and lean burn in which the burning is performed at a lean air-fuel ratio. By supplying fuel to exhaust gas from a fuel addition valve provided to an exhaust pipe during a lean period in which the lean burn is executed, the temperature of the storage-reduction type NOx catalyst is maintained at a temperature that enables the reduction and release of the SOx. During a rich period in which the rich burn is executed, a rich atmosphere of the storage-reduction type NOx catalyst is achieved to cause the reduction and release of the SOx. Further, the SOx is reduced and released from the storage-reduction type NOx catalyst also during the lean period by achieving a rich air-fuel ratio of the exhaust gas by the fuel addition from the fuel addition valve.05-26-2011
20110120097Urea SCR diesel aftertreatment system - A device and method for catalytic reduction of NOx in gaseous products of a combustion process before entry into the atmosphere. The gaseous and particulate products of a combustion process flow radially through a radial flow particulate filter element (05-26-2011
20120079816TURBOCHARGER MIXING MANIFOLD FOR AN EXHAUST AFTERTREATMENT SYSTEM FOR A LOCOMOTIVE HAVING A TWO-STROKE LOCOMOTIVE DIESEL ENGINE - A turbocharger mixing manifold for an exhaust aftertreatment system for a two-stroke locomotive diesel engine providing for a transition of a non-uniform exhaust gas flow field exiting a turbocharger into a regulated, uniform exhaust gas stream with minimal aerodynamic losses and an even distribution (mixing) of hydrocarbons in liquid, gas or burning states in order to ensure optimal performance of the attached exhaust aftertreatment system.04-05-2012
20110265460APPARATUS FOR CONTROLLING SUPPLY POWER TO CONDUCTIVE CARRIER OF CATALYST CONVERTER - In an apparatus for controlling supply power to a conductive porous carrier of a catalyst converter for cleaning an emission, a moisture determiner determines whether moisture is contained in and/or on the conductive porous carrier. A power controller controls supply power to the conductive porous carrier for energization of the conductive porous carrier such that a value of the supply power to the conductive porous carrier when it is determined that the moisture is contained in and/or on the conductive porous carrier is lower than a value of the supply power to the conductive porous carrier when it is determined that the moisture is not contained in and/or on the conductive porous carrier.11-03-2011
20110265459REDUCTANT DOSING MANIFOLD - A reductant dosing manifold is disclosed. The reductant dosing manifold may have a housing with a pump interface configured to directly connect the reductant dosing manifold to a reductant pump, and a reductant supply passage in fluid communication with the pump interface. The housing may also have a reductant outlet port, and a pressurized reductant passage connecting the pump interface to the reductant outlet port.11-03-2011
20120090302EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine is provided with an exhaust treatment device which purifies exhaust, a fuel feed device which is arranged at an upstream side from the exhaust treatment device and which feeds fuel to the engine exhaust passage, an ignition device which causes fuel which is fed from the fuel feed device to ignite, and a flow regulating device which regulates the flow rate of exhaust gas which flows toward the ignition device. The fuel feed device is formed so as to feed liquid fuel. The system has an operating region in which due to the fuel which is fed to the engine exhaust passage burning, backflow of the exhaust gas occurs. Further control is performed to make the flow rate of the exhaust gas increase during the period from when combustion of fuel should be started to when combustion of the fuel ends.04-19-2012
20100199642EXHAUST GAS PURIFYING APPARATUS AND METHOD FOR REGENERATING PARTICULATE FILTER THEREOF - An exhaust gas purifying apparatus includes an exhaust pipe, a first oxidation catalyst, a selective catalytic reduction (SCR) catalyst, a urea water supply system, a particulate filter (PF) and a controller. Exhaust gas discharged from an internal combustion engine flows through the exhaust pipe. The first oxidation catalyst is disposed in the exhaust pipe. The SCR catalyst is disposed in the exhaust pipe downstream of the first oxidation catalyst. The urea water supply system supplies urea water to the SCR catalyst. The PF is disposed in the exhaust pipe downstream of the SCR catalyst. The controller stops supplying the urea water from the urea water supply system during regeneration of the PF, so as to supply the NO08-12-2010
20100199641System For Managing A Reagent Dispensing Device In An Exhaust Line - The invention relates to a system for managing a reagent dispensing device in the exhaust line of an engine, said circuit including a tank (08-12-2010
20100132335SCR EMISSIONS-CONTROL SYSTEM - An emissions-control system of a vehicle is provided, having an LNT disposed in an exhaust system of the vehicle, downstream of the engine, an SCR device disposed downstream of the LNT, and a controller. The controller is operatively coupled to the engine and configured to cause the engine to provide a reducing exhaust to the LNT at least during an enrichment interval, the enrichment interval including an enrichment subinterval beginning after a sensor indicates rich breakthrough, and further configured to adjust the duration and/or the level of enrichment for the enrichment subinterval in response to an ageing of the LNT. In this way, it is possible to modify LNT regeneration based on catalyst performance and thereby generate sufficient ammonia for improved operation of the SCR device.06-03-2010
20100132334METHOD AND DEVICE FOR MONITORING THE REGENERATION OF A POLLUTION-REMOVAL SYSTEM - A method for monitoring regeneration of a pollution-removal system, relying on introduction of fuel into exhaust gases by delayed injections of fuel into certain combustion chambers of an engine and/or direct injections into an exhaust system upstream of a filter depending on an inlet temperature of the system. Introduced fuel delivery is assigned to direct injections into the exhaust system and/or to delayed injections into the combustion chamber according to the value of the wall temperature of the exhaust system.06-03-2010
20110138785THERMAL ENHANCER AND HYDROCARBON DOSER - A catalyst is positioned downstream of a thermal enhancer, such as a fuel-fired burner for example. A doser injects hydrocarbons into the thermal enhancer to maintain exhaust gas temperatures such that the catalyst is in an active condition and to raise exhaust gas temperatures to a level such that a diesel particulate filter can be regenerated.06-16-2011
20110146247METHOD FOR INTRODUCING A REDUCTANT INTO AN EXHAUST STREAM - A method of introducing reductant to an exhaust stream is disclosed. The method may include ordering a first dosing event, supplying a reductant to a dispensing device in response to ordering the first dosing event, dispensing reductant from the dispensing device into the exhaust stream, and forcing reductant from the dispensing device toward a reductant source, wherein sufficient reductant remains in a pumping device and a fluid passage to keep the pumping device primed.06-23-2011
20110146246REGENERATION ASSIST TRANSITION PERIOD - A power system comprising an engine that produces exhaust, a particulate filter that traps soot from the engine, and a controller that switches the power system from a first operation mode into a second operation mode to regenerate the particulate filter wherein a transition between the first operation mode and the second operation mode occurs at a slower rate when an amount of soot in the particulate filter changes relative to a threshold than when a load on the engine changes.06-23-2011
20110146245SULFUR DETECTION ROUTINE - A power system comprising an engine that produces exhaust, an aftertreatment system that treats the exhaust and includes a particulate filter that traps soot from the engine, and a controller configured to perform a sulfur detection routine that conducts a pre-regeneration calibration to achieve a temperature in the aftertreatment system of between 200 and 400 degrees Celsius and following the pre-regeneration calibration conducts a sulfur removal calibration to achieve a temperature in the aftertreatment system of between 300 and 500 degrees Celsius.06-23-2011
20120240559EXHAUST PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - Degradation of ignition means due to combustion of foreign objects attached to the ignition means is suppressed. There are provided a fuel supplying apparatus for supplying fuel into an exhaust passage in an internal combustion engine, a heating apparatus for burning the supplied fuel, and a controller. The controller, in a case where unburned components of an exhaust gas are deposited in the heating apparatus, burns the deposited unburned components by the heating apparatus for removal before increasing a temperature of the exhaust gas by igniting the fuel supplied from the fuel supplying apparatus by the heating apparatus.09-27-2012
20080245059Method For Operation of an Internal Combustion Engine and Device For Carrying Out the Method - A method for operation of an internal combustion engine, comprising an exhaust treatment device in the exhaust system thereof, with application of a reagent under given operating conditions of the internal combustion engine and/or the exhaust treatment device and a device for carrying out the method are disclosed, wherein a correction parameter is determined for a reagent signal, describing the amount of reagent to be introduced into the exhaust system and the correction parameter is determined by means of a comparison of a measure of the actual amount of the reagent in the exhaust system, which should be introduced based on a measure of a pre-determined set amount and the measure of the set amount. The above method permits a particularly exact maintenance of the amount of reagent introduced into the exhaust system in accordance with the pre-determined measure for the set amount.10-09-2008
20110232270FUEL SYSTEM HAVING MULTI-FUNCTIONAL ELECTRIC PUMP - A pump for a fuel system is provided. The pump may have a pumping mechanism and an electric motor connected to drive the pumping mechanism. The pump may also have a low-pressure inlet passage in fluid communication with the pumping mechanism, a pressurized inlet passage in fluid communication with the pumping mechanism, a first outlet passage in fluid communication with the pumping mechanism, and a second outlet passage. The pump may further have a valve movable from a first position at which the second outlet passage is blocked from the pumping mechanism, to a second position at which the second outlet passage is in fluid communication with the pumping mechanism.09-29-2011
20080223020Internal Combustion Engine - An engine exhaust passage has an SO09-18-2008
20080223019SCR COLD START HEATING SYSTEM FOR A DIESEL EXHAUST - An exhaust system includes a heating element that is disposed downstream from an engine and that introduces thermal energy into an exhaust of the engine. A selective catalyst reduction (SCR) unit is disposed downstream from the heating element and filters nitrogen oxides (NOx) within the exhaust. A control module is in communication with and energizes the heating element based on temperature of the SCR unit.09-18-2008
20130167513Diesel Particulate Fllter Having Three Way Catalyst Coating - Apparatuses described herein relate to a diesel particulate filter for use in a diesel engine exhaust system. The diesel particulate filter comprises a particulate filter having a plurality of filter flow channels configured to remove diesel exhaust particulates from a diesel exhaust stream. The plurality of filter flow channels are disposed for contact with the diesel exhaust stream and are coated with a three-way catalyst coating. The three-way catalyst coating may be configured to assist in soot oxidation during regeneration events as well as for the reduction of NO07-04-2013
20080216467Method and Device for Reducing the Nitrogen Oxide Proportion in the Exhaust Gas of an Internal Combustion Engine - A method and device for reducing the nitrogen oxide proportion in exhaust gas of an internal combustion engine, carry out selective catalytic reduction on a reduction catalytic converter, at least discontinuously supplied with reducing agent. A reduction catalytic converter storage capacity for reducing agent and dependence of the storage capacity on temperature of the catalytic converter are considered when determining the reducing agent amount to be supplied. The reducing agent amount to be supplied can be adjusted to future temperature of the reduction catalytic converter and storage capacity at that temperature, for example preventing the reducing agent from desorbing from the catalytic converter when the temperature of the catalytic converter increases, e.g. by regenerating a particle filter. A reduced reducing agent amount is therefore supplied prior to regeneration of the particle filter instead of an amount required for stoichiometrically reacting nitrogen oxides in the exhaust gas without considering storage capacity.09-11-2008
20120247090EXHAUST GAS PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE - The exhaust gas purifying device of an internal combustion engine includes: an electrically heated catalyst which is provided on an exhaust passage of the internal combustion engine, which purifies the exhaust gas drawn to the exhaust passage, and is warmed by electrification; and an electrification characteristic setting unit which set an electrification characteristic indicating a characteristic of an electrification resistance value in the electrically heated catalyst, in accordance with an electrification condition at a time of starting the electrification of the electrically heated catalyst. Thus, various determinations and controls relating to the electrically heated catalyst and using the electrification characteristic can be accurately performed.10-04-2012
20130111886Electronically Heated NOx Adsorber Catalyst - An exhaust gas treatment system for an internal combustion engine is provided, and includes an exhaust gas conduit, an upstream selective catalytic reduction (“SCR”) device, an electrically heated catalyst (“EHC”) device, an oxidation catalyst (“OC”) device, a downstream SCR device, and a control module. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located downstream of the upstream SCR device and is selectively activated to produce heat. The OC device is in fluid communication with the exhaust gas conduit, and is selectively heated by the EHC device. At least one of the EHC device and the OC device have a NO05-09-2013
20110265458HYDROCARBON ENERGY STORAGE AND RELEASE CONTROL SYSTEMS AND METHODS - An exhaust control system comprises an absorption rate estimation module, a desorption rate estimation module, a rate of change module, a release rate estimation module, and a fuel control module. The absorption rate estimation module estimates a hydrocarbon energy absorption rate of a component of an exhaust system. The desorption rate estimation module estimates a hydrocarbon energy desorption rate of the component. The rate of change module that determines a stored energy rate of change based on a difference between the hydrocarbon absorption and desorption rates. The release rate estimation module estimates a hydrocarbon energy release rate for the component based on the stored energy rate of change. The fuel control module controls a rate of fuel injection into the exhaust system upstream of an oxidation catalyst based on the hydrocarbon energy release rate.11-03-2011
20080202103Software, methods and systems including soot loading metrics - One embodiment is a method including a unique soot loading metric. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.08-28-2008
20080202102Device and Method For regenerating a Particulate Filter - The invention relates to a device for the regeneration, temperature loading and/or thermal management of a component, which is assigned to an exhaust gas system, of an internal combustion engine preferably of a vehicle, having, at least one injection valve, which operates preferably in a chatter mode as a function of the pressure of supplied fuel, for injecting fuel for the purpose of regeneration, temperature loading and/or thermal management into the exhaust system of the internal combustion engine. The invention is distinguished by at least one pressure control valve (08-28-2008
20080202101Exhaust treatment system - An exhaust gas treatment system of an internal combustion engine includes a selective catalytic reduction catalyst fluidly connected to the internal combustion engine, a particulate filter fluidly connected downstream of the selective catalytic reduction catalyst, and an induction line configured to direct a portion of a filtered exhaust flow of the internal combustion engine toward an inlet of the engine.08-28-2008
20100307140METHOD TO MONITOR HC-SCR CATALYST NOX REDUCTION PERFORMANCE FOR LEAN EXHAUST APPLICATIONS - A method for initiating a regeneration mode in selective catalytic reduction device utilizing hydrocarbons as a reductant includes monitoring a temperature within the aftertreatment system, monitoring a fuel dosing rate to the selective catalytic reduction device, monitoring an initial conversion efficiency, selecting a determined equation to estimate changes in a conversion efficiency of the selective catalytic reduction device based upon the monitored temperature and the monitored fuel dosing rate, estimating changes in the conversion efficiency based upon the determined equation and the initial conversion efficiency, and initiating a regeneration mode for the selective catalytic reduction device based upon the estimated changes in conversion efficiency.12-09-2010
20100307139REGENERATION SYSTEMS AND METHODS FOR PARTICULATE FILTERS USING VIRTUAL BRICK TEMPERATURE SENSORS - An exhaust control system includes a temperature sensor, a temperature estimation module, and an exhaust condition adjustment module. The temperature sensor measures an outlet temperature of an exhaust gas downstream from an emission reduction device. The temperature estimation module estimates a highest temperature of the emission reduction device. The exhaust condition adjustment module controls operation of the exhaust control system based on the highest temperature of the emission reduction device.12-09-2010
20100307138DIESEL ENGINE EXHAUST PURIFIER - A diesel engine exhaust purifier includes a burner system having a metal barrel mounted in the exhaust pipe of a diesel vehicle and a flame thrower mounted in the metal barrel, pressure sensors mounted in the front and rear ends of the metal barrel, a precious metal catalyzer converter type filter system mounted in the metal barrel for removing solid matters from engine exhaust gas and a microcontroller electrically connected to the power supply system of the diesel vehicle for driving the pump-operated fuel tank of the flame thrower to deliver forced fuel out of a fuel nozzle and an auto igniter to ignite the mist of fuel discharged out of the fuel nozzle for burning out cumulated carbon subject to the detection of the pressure sensors.12-09-2010
20130152554METERING UNIT FOR A REDUCING AGENT, METHOD FOR METERING REDUCING AGENT AND MOTOR VEHICLE HAVING A METERING UNIT - A metering unit for a reducing agent includes an injector for supplying the reducing agent to an exhaust gas treatment device. A temperature sensor is disposed at the injector. A method for metering reducing agent and a motor vehicle having a metering unit are also provided.06-20-2013
20130186074INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine includes: a turbocharger arranged in exhaust passage; EGR passage branching off from the exhaust passage downstream of a turbine of the turbocharger and connected to intake passage; a burner device arranged in the exhaust passage between the turbine and the portion where the EGR passage branches off to increase exhaust temperature; a bypass passage branching off from the exhaust passage between the turbine and the burner device and connected to the EGR passage; and a bypass valve to adjust flow rate of exhaust gas passing through bypass passage. When flow rate of the exhaust gas is increased, the bypass valve is open, and part of the exhaust gas is guided to the bypass passage. The flow rate of the exhaust gas to be supplied to the burner device is reduced, and the ignition performance of the burner device is ensured.07-25-2013
20120017572TEMPERATURE RAISING SYSTEM FOR AN EXHAUST GAS PURIFICATION CATALYST - A technique is provided which is capable of reducing an amount of smoke generated in a temperature raising system in which fuel added to an exhaust gas flowing through an exhaust passage is caused to combust at the time of requesting a temperature rise in an exhaust gas purification catalyst.01-26-2012
20120017571METHOD FOR METERING A REAGENT INTO AN EXHAUST GAS DUCT AND DEVICE FOR CARRYING OUT THE METHOD - The invention proposes a method for metering a reagent, in which the reagent is sprayed into a spray tube (01-26-2012
20100000202Dual catalyst NOx reduction system for exhaust from lean burn internal combustion engines - A method and apparatus for reducing the percentage of nitrogen dioxide and nitrogen monoxide in an exhaust gas stream of an internal combustion engine, comprising the steps of injecting a hydrocarbon compound and optionally hydrogen into the exhaust gas stream; passing the exhaust gas through a first catalyst for selective reduction of a portion of the nitrogen oxides to nitrogen, ammonia, and N-containing species; passing the exhaust gas through a second catalyst for selective reduction of a portion of the nitrogen oxides with ammonia to molecular nitrogen; sensing ammonia concentration in the exhaust gas stream after passage through either or both of the first and second catalysts; and controlling by a controller in a feedback loop the injecting to an amount of hydrocarbon that will produce a predetermined concentration of ammonia and nitrogen oxides at the sensor that will lead to high NOx conversion.01-07-2010
20130199163FUEL INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - In a fuel injection system of an internal combustion engine in which a first fuel, which has a property to inhibit the adsorption of exhaust gas components by an exhaust gas purification catalyst, and the second fuel, which has a property not to inhibit the adsorption of the exhaust gas components by the exhaust gas purification catalyst, are able to be selectively used, the present invention has a task to decrease an amount of consumption of the second fuel in a suitable manner. In order to solve this task, the fuel injection system of an internal combustion engine according the present invention is constructed such that the second fuel is first supplied to the internal combustion engine when the exhaust gas purification catalyst is in a cold state, and a change from the second fuel to the first fuel is then made before the exhaust gas purification catalyst subsequently rises in temperature to an activation temperature thereof.08-08-2013
20130098003METHOD AND DEVICE FOR CONTROLLED DOSING OF A GAS WITH FLUCTUATING SUPPLY PRESSURE - A method for controlled dosing of a gas with fluctuating supply pressure (P04-25-2013

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