Entries |
Document | Title | Date |
20080209891 | METHOD OF OPERATING A SYNGAS GENERATOR - A method of operating a syngas generator within a desired temperature range, despite a need for intermittent syngas output, involves switching between operating the syngas generator in a rich mode and a lean mode. Operation of the syngas generator in both the rich mode and the lean mode sustains the operating temperature of the syngas generator within that desired temperature range, particularly for non-catalytic reactors. The method of switching from the lean mode to the rich mode of operation can include decreasing the oxygen-to-carbon ratio of reactants supplied to the syngas generator. The flow rate of one or more of the reactant streams supplied to the syngas generator can be actively controlled in order to switch operation of the syngas generator between the rich and lean modes. | 09-04-2008 |
20080209892 | METHOD FOR THE CLOSED-LOOP CONTROL OF THE REGENERATION OF A PARTICLE FILTER - The invention concerns a method for the closed-loop control of the regeneration of a particle filter in the exhaust gas system of an internal combustion engine, wherein the burn-off of particles in the particle filter during a regeneration process is controlled by a closed-loop control of the oxygen content of the exhaust gas and/or wherein the temperature of the exhaust gas or of at least one component of the exhaust gas aftertreatment system is controlled in a closed loop. Provision is thereby made for the corrective controller actions for the closed-loop control of the oxygen content and/or the temperature of components of the exhaust gas aftertreatment system to take place only during stable combustion conditions of the internal combustion engine. | 09-04-2008 |
20080223021 | Ammonia vapor management system and method - A method of managing vapors generated from an ammonia-containing reductant delivery system for an engine, comprising of storing an ammonia-containing fluid in a first storage device; generating ammonia vapors in the first storage device and storing said generated ammonia vapors in a second storage device; and purging said stored vapors from the second storage device to upstream of a combustion chamber of the engine during a first condition and downstream of the combustion chamber during a second condition. | 09-18-2008 |
20080250773 | Control of filter regeneration - A system comprises an engine including an exhaust system with a particle filter operable to collect particulate matter in exhaust produced by the engine, a sensor arrangement, a controller, and one or more engine control devices. The sensor arrangement provides a first sensor signal representative of oxygen in the exhaust and a second sensor signal representative of a temperature of the particle filter. The controller regulates operation of the particle filter in response to the sensor arrangement. The controller is structured to generate one or more output signals corresponding to a minimum exhaust flow rate as a function of the first and second sensor signals. The control devices are responsive to the one or more output signals to provide the minimum exhaust flow rate to the filter. | 10-16-2008 |
20080276601 | EXHAUST EMISSION PURIFYING APPARATUS FOR ENGINE - An exhaust emission purifying apparatus for an engine in which it is determined that a reducing agent supply system is clogged, which is arranged on the downstream of a pump carrying out suction and pumping of a liquid reducing agent out of a reducing agent tank, when a reduction in a pressure of the liquid reducing agent remaining in the downstream of the pump and also in the upstream of a flow control valve by an amount equal to or more than a first predetermined pressure does not occur until a cumulative injection amount obtained by sequentially integrating an injection amount of the liquid reducing agent computed in real time based on engine operating conditions reaches a predetermined amount after the pump has been temporarily stopped. | 11-13-2008 |
20090019838 | DIESEL PARTICULATE FILTER EXTENDED IDLE REGENERATION - A method of regenerating a diesel particulate filter (DPF) may include operating a vehicle including a diesel engine at an idle condition and applying a load to the diesel engine during the idle condition to increase an exhaust temperature of the diesel engine relative to a nominal idle condition. The increased exhaust temperature may regenerate a diesel particulate filter of the diesel engine during the idle condition. | 01-22-2009 |
20090019839 | Diesel particulate filter regeneration system - A diesel combustion engine comprises multiple particulate filters and corresponding exhaust piping and valving in the exhaust manifold and/or exhaust line, configured to enable regeneration to occur in one of the DPF filters through heating the exhaust from a single cylinder of the engine, while the exhaust from the remaining cylinders is temporarily routed through the other DPF filter during the regeneration event. Flow redirection devices are placed within the DPF filters to direct flow of exhaust gas through the DPF filters during regeneration in a manner to facilitate complete regeneration, including in outer volumes along the interior walls of the DPF filters. | 01-22-2009 |
20090025373 | METHOD AND METERING SYSTEM FOR REDUCING POLLUTANTS IN MOTOR VEHICLE EXHAUST GASES - A method of metering a fluid, pollutant-reducing medium, in particular an aqueous urea solution, into a motor vehicle exhaust system is proposed, in which the fluid medium is delivered to a nozzle module, in particular a nozzle or a valve, and introduced into the exhaust system by the nozzle module. A transport system arranged upstream of the nozzle module is activated with pulse-width modulation. The method and the associated metering system ensure that, in particular, a reducing agent is arranged or metered precisely and in a robust manner relative to degrees of coldness, with the use of few components. | 01-29-2009 |
20090031710 | SCR emissions control system - An emissions control system is disclosed. The emissions control system may have an SCR device that receives a flow of exhaust. The emissions control system may also have an injector that introduces a reduction agent into the flow of exhaust at or upstream of a catalyst within the SCR device. The emissions control system may have a controller in communication with the injector, the controller being configured to calculate a first amount of the reduction agent by using an approximation that at least one of a plurality of SCR reactions must be completed before the remaining SCR reactions commence. The controller may also be configured to adjust the injector according to at least the first amount. | 02-05-2009 |
20090038293 | Exhaust System of Internal Combustion Engine - A first control valve is disposed downstream of a junction point of a first exhaust passage, and a second catalytic converter is disposed downstream of a junction point of the second exhaust passage. The first control valve and the second control valve are controlled so that the exhaust gas of all of the cylinders mainly passes one of the first catalytic converter disposed in the first exhaust passage and the second catalytic converter disposed in the second exhaust passage during a fuel-supply cutoff period. | 02-12-2009 |
20090090098 | Exhaust Gas Purifying Apparatus for Internal Combustion Engine - An exhaust gas purifying apparatus for an internal combustion engine is provided. The apparatus includes a first group of cylinders; a second group of cylinders; an exhaust passage having a first branch passage connected to the first group of cylinders and a second branch passage connected to the second group of cylinders; a communication passage which connects the first branch passage and the second branch passage with each other; an exhaust gas purifying device provided in the exhaust passage and located downstream from a position connected to the communication passage; and an exhaust flow control device for controlling flow of exhaust gas such that exhaust gas emitted from one of the first group of cylinders and the second group of cylinders is introduced into the branch passage connected to the other group of cylinders through the communication passage when a predetermined exhaust flow switching condition is established, wherein a flow-passage cross section of the communication passage is smaller than those of the first branch passage and the second branch passage, and the communication passage is provided with a fuel addition valve for adding fuel to exhaust gas from upstream of the exhaust gas purifying device. | 04-09-2009 |
20090120071 | Hydrocarbon Retaining System for Flex-Fuel Combustion Engine - Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described. | 05-14-2009 |
20090126351 | Exhaust system of internal combustion engine - An exhaust system of an internal combustion engine includes a main catalyst converter, a bypass catalyst converter, a bypass catalyst converter with a smaller volume and a shift valve device. Upstream-side main exhaust passages have a collecting portion connected with a downstream-side main exhaust passage connected with the main catalyst converter. Bypass exhaust passages have the bypass catalyst converter therein, being connected between the shift valve device and the downstream-side main exhaust passage. The shift valve device is disposed at a position from the upstream-side portions of the upstream-side main exhaust passages to a head flange fixable to a cylinder head of the engine to be shiftable between a first shift position where the upstream-side main exhaust passages are closed and the bypass exhaust passages are opened and a second shift position where the upstream-side main exhaust passages are opened. | 05-21-2009 |
20090173061 | OPTIMIZED REDUCTION OF NOx EMISSIONS FROM DIESEL ENGINES - A system is provided for operating a diesel engine with reduced emissions of NOx. The system comprises a fuel tank adapted to directly or indirectly supply a first premixed fuel stream and a second premixed fuel stream, wherein each fuel stream comprises a primary fuel component and a reductant component. An engine is in fluid communication with the fuel tank, whereby the engine is configured to receive the first premixed fuel stream and create an exhaust stream. The system includes an emission treatment unit to treat the exhaust stream, and a separation unit configured to receive the second premixed fuel stream. The separation unit is also configured to separate the second premixed fuel stream into a first fraction stream and a second fraction stream, and supply the first fraction stream to the exhaust stream. The first fraction stream comprises a higher concentration of the reductant component than the second fraction stream. A temperature sensor measures the temperature of the exhaust stream, whereby the concentration of the reductant component in the exhaust stream is controlled based on the measured temperature of the exhaust stream. The invention further provides a method for operating a diesel engine with reduced emissions of NOx. The method includes supplying a first premixed fuel stream to an engine, wherein the engine is configured to create an exhaust stream. A second premixed fuel stream is supplied to a separation unit, wherein the first and second premixed fuel streams each comprise a reductant component and a primary fuel component. At least a portion of the second premixed fuel stream is separated into a first fraction stream and a second fraction stream via the separation unit, wherein the first fraction stream comprises a higher concentration of the reductant component than the second fraction stream. At least a portion of the first fraction stream is supplied to the exhaust stream. The temperature of the exhaust stream is measured, and the concentration of the reductant component in the exhaust stream is controlled based on the measured temperature. The selective catalytic reduction of NOx present in the exhaust stream is performed. | 07-09-2009 |
20090193793 | EXHAUST EMISSION PURIFYING APPARATUS FOR ENGINE - When a concentration measured by a sensor is lower than a predetermined threshold, it is judged that a liquid is any different type of aqueous solution, and also, it is judged whether or not the different type discrimination is adequate. When the discrimination is adequate, the number of different type discriminating times is counted up based on a predetermined counted value, and when the number thereof is equal to or larger than a determination threshold, the different type discrimination is determined. At this time, at least one of the predetermined counted value and the determination threshold is dynamically set based on a liquid level of a reducing agent tank, so that the counting and/or the different type discriminating determination is performed considering convection which is changed according to a level change to thereby discriminate with high precision whether or not the liquid is the different type of aqueous solution. | 08-06-2009 |
20090241518 | System for detecting sulfuric acid - In one aspect, the present disclosure is directed to a system for reacting with sulfuric acid. The system may include a housing having an inlet and an outlet and may also include a component disposed downstream of the inlet and upstream of the outlet. The component may be configured to restrict a flow of fluid through the housing as a function of sulfuric acid present within the fluid. | 10-01-2009 |
20090241519 | METHOD FOR THE OPERATION OF AN EMISSION CONTROL SYSTEM LOCATED IN AN EXHAUST GAS ZONE OF AN INTERNAL COMBUSTION ENGINE - Disclosed is a method for operating an emission control system that is located in an exhaust gas zone of an internal combustion engine and comprises a catalytic layer causing an oxidation reaction as well as a particle filter in which at least one exhaust gas component is deposited when the internal combustion engine is operated and which is regenerated from said exhaust gas component in predefined operating phases. According to the inventive method, the air throughput through at least one combustion chamber of the internal combustion engine is reduced in the predefined operating phases in which the particle filter is regenerated. | 10-01-2009 |
20090249770 | Exhaust Gas Purifying Apparatus for Internal Combustion Engine - An exhaust gas purifying apparatus for an internal combustion engine includes plural exhaust gas purifying units which are provided on exhaust gas passages connected to plural cylinder groups in the internal combustion engine and purify exhaust gas flowing in the exhaust gas passages, a regeneration determining unit which determines whether or not the plural exhaust gas purifying units should be regenerated, and a regeneration control unit which executes regeneration control for regenerating the exhaust gas purifying units when the regeneration determining unit determines that the exhaust gas purifying units should be regenerated. The regeneration control unit simultaneously executes the regeneration control for the plural exhaust gas purifying units when a change of a combustion mode of the internal combustion engine is involved before and after execution of the regeneration control. Meanwhile, the regeneration control unit independently executes the regeneration control for each of the plural exhaust gas purifying units when the change of the combustion mode is not involved before and after the execution of the regeneration control. | 10-08-2009 |
20090249771 | Exhaust Gas Purification System for a V Type 8-Cylinder Internal Combustion Engine - A technique that suppresses adhesion of fuel added from fuel addition valves to exhaust passages and suppresses fuel from slipping through exhaust gas purification devices is provided. Timing of the addition of fuel is switched into a period in which instantaneous exhaust gas flow rates in the exhaust passages are different, in accordance with engine operating condition. As a result, when operating condition has a high possibility of fuel adhering to the exhaust pipes, fuel is added when the instantaneous exhaust gas flow rates in the exhaust pipes are high, so that fuel can be easily carried to the vicinity of the exhaust gas purification devices. When the operating condition has a high possibility of fuel slipping through the exhaust gas purification devices, fuel is added when the instantaneous exhaust gas flow rates in the exhaust pipes are low, so that the fuel can not be easily entrained in the exhaust gas to slow movement of fuel. | 10-08-2009 |
20090272104 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST USING AMMONIA STORAGE AND SLIP CONTROL - Various embodiments of an apparatus, system, and method are disclosed for reducing NO | 11-05-2009 |
20090288398 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING PARTICULATE ACCUMULATION ON AN ENGINE FILTER DURING ENGINE IDLING - According to one representative embodiment, an apparatus disclosed herein includes a regeneration event timing module, an engine speed module, an exhaust gas temperature module, and a thermal management module. The regeneration event timing module is configured to determine a regeneration event timing strategy for implementation during extended idling of the engine. The regeneration event timing strategy includes a first time period and a second time period following the first time period. The engine speed module is configured to determine a desired engine speed for the second time period and operate the engine at the desired engine speed during the second time period. The desired engine speed is greater than an idling engine speed associated with the first time period. The exhaust gas temperature module is configured to determine a desired particulate matter filter inlet exhaust gas temperature. The desired particulate matter filter inlet exhaust gas temperature corresponds to a particulate matter filter temperature for achieving a noxidation regeneration of particulate matter on the particulate matter filter. The thermal management module is configured to modulate at least one engine system component to achieve the desired particulate matter filter inlet exhaust gas temperature during the second time period. | 11-26-2009 |
20090308057 | EXHAUST LINE OF A DIESEL ENGINE AND DESULFATION METHOD - A method for desulfating an NOx trap of an exhaust line of a diesel engine, the method to extract during the operation of the engine at least one portion of the fixed sulphur compounds in the NOx trap. The method produces a reformate via a reformer device from the fuel of the engine, preheat the NOx trap via injection of the reformate in the flow of exhaust gases, in an injection point located downstream of the engine is upstream of the NOx trap, until a predetermined desulfation temperature is reached in the NOx trap, then bypasses the flow of exhaust gases from a bypass point of the exhaust line located upstream of the injection point, and continues the injection of reformate in the NOx trap to produce the desulfation, the richness of the mixture supplying the diesel engine not being affected in the method. | 12-17-2009 |
20090308058 | DETERIORATION DETERMINATION DEVICE FOR CATALYST, CATALYST DETERIORATION DETERMINING METHOD, AND ENGINE CONTROL UNIT - A deterioration determination device for a catalyst, which is capable of accurately determining deterioration of a catalyst without being influenced by the response delays of outputs from the upstream and downstream oxygen concentration parameter sensors. The deterioration determination device includes upstream and downstream LAF sensors for detecting respective upstream and downstream oxygen concentration parameters. After switching exhaust gases flowing through the former parameter sensor into the catalyst to a reduction atmosphere, an upstream oxygen concentration parameter detected for comparison when a predetermined time period elapses after it exceeds a predetermined value is compared with a downstream oxygen concentration parameter detected for comparison when the predetermined time period elapses after it exceeds the predetermined value. Based results of the comparison, deterioration of the catalyst is determined. | 12-17-2009 |
20090308059 | CATALYST WARMING-UP CONTROL DEVICE - A catalyst is provided in an exhaust passage of an engine and an evaporating section of a heat recovery device is provided upstream of the catalyst in the exhaust passage. An ECU performs an operation for compulsorily oscillating an air-fuel ratio between a lean state and a rich state as compared to a theoretical air-fuel ratio when temperature of the catalyst reaches temperature at which the catalyst has a predetermined purification capacity after the engine is started. The ECU restricts a flow of a working fluid in the heat recovery device until the temperature of the catalyst reaches the temperature at which the catalyst has the predetermined purification capacity after the engine is started. | 12-17-2009 |
20090313974 | CATALYST DETERIORATION-DETERMINATION DEVICE AND METHOD AND ENGINE CONTROL UNIT - A catalyst deterioration-determining device capable of properly performing deterioration determination, while compensating for differences in output characteristics of oxygen concentration parameter sensors disposed upstream and downstream of the catalyst, respectively. After exhaust gases flowing into the catalyst having an oxygen storage capability are switched from oxidation atmosphere to reduction atmosphere, first and second equivalent ratios indicative of oxygen concentrations, detected by first and second LAF sensors disposed upstream and downstream of the catalyst, are integrated to calculate respective first and second reducing agent amount integrated values. The integrated values are corrected by dividing them by respective average values of the first and second equivalent ratios calculated after the lapse of a predetermined time period, such that differences in gains of the first and second LAF sensors are compensated for. Then, the corrected first and second integrated values are compared for catalyst deterioration determination. | 12-24-2009 |
20100011750 | EXHAUST EMISSION PURIFICATION METHOD AND EXHAUST EMISSION PURIFICATION SYSTEM - In an exhaust emission purification method and an exhaust emission purification system where forced regeneration start timing of a DPF for purifying the PM (particulate matters) in exhaust gas is judged based on the comparison of a differential pressure across the DPF with a predetermined differential pressure threshold across the DPF, a differential pressure threshold (ΔPs) across the DPF is set by multiplying a reference differential pressure threshold (ΔPs | 01-21-2010 |
20100031642 | EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, a urea adsorption type selective reduction catalyst is arranged in an engine exhaust passage. By feeding urea from a urea feed valve into the exhaust gas flowing into this selective reduction catalyst, the NOx included in the exhaust gas is reduced in the selective reduction catalyst. TO suppress the generation of hydrogen cyanide, an HC adsorption catalyst for adsorption of the HC in the exhaust gas is arranged in the engine exhaust passage upstream of the selective reduction catalyst. | 02-11-2010 |
20100043407 | ENGINE WITH EXHAUST COOLING AND METHOD - An engine arrangement includes an engine, an exhaust line downstream of the engine, an aftertreatment device in the exhaust line, and a conduit between a source of fluid and a point in the exhaust line upstream of the aftertreatment device. A method is also disclosed. | 02-25-2010 |
20100043408 | METHOD FOR THE CALIBRATION AND MANAGEMENT OF AN EXHAUST LINE COMPRISING A PARTICLE FILTER - The invention relates to a method for the calibration and/or management of an exhaust line of a motor vehicle comprising a particle filter (X), said method comprising an initial step of measuring, over a representative population of the filter, the increase in the loss of load generated by a limited load of soot particles present in a filter, that is the threshold for the triggering of a filter regeneration phase; a step of measuring, in the absence of soot particles, the loss of specific load of the filter (X); and a step of determining, on the basis of the values obtained in steps a) and b), a limited value for the loss of load, that is the threshold for the triggering of a regeneration phase. The invention also relates to a system for managing an exhaust line comprising means for implementing said method. | 02-25-2010 |
20100043409 | Method and system for controlling the operation of a pump - Method for controlling the operation of a pump driven by an electric motor and controlled by a controller, according to which an electronic control module (ECM) sends, to the controller, a PWM (Pulse Width Modulation) control signal having a duty cycle that varies as a function of the desired operating conditions for the pump and according to which the controller acts on the electric motor to apply said operating conditions to the pump. | 02-25-2010 |
20100043410 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An object of the present invention, in an internal combustion engine equipped with a moisture adsorbent and a NOx adsorbent in series in order from the upstream side of an exhaust passage, is to provide an exhaust gas purifying apparatus for the internal combustion engine which can successfully prevent an adsorption capability of NOx from being inhibited by moisture and is capable of maintaining the NOx adsorption capability of the NOx adsorbent adequately. A main exhaust passage | 02-25-2010 |
20100050613 | PROCESS FOR REDUCING NOX EMISSIONS FROM ENGINE EXHAUST USING LNT AND SCR COMPONENTS - A method of reducing NOx in a vehicle exhaust operating by alternating exhaust flow between two lean NOx traps and directing the emerging exhaust to a downstream SCR catalyst system. While exhaust predominantly flows through one of the lean NOx traps, a reductant is provided to the other NOx trap so as to produce ammonia that is also directed to the SCR catalyst system. An exhaust system implementing the method of the invention is also provided. | 03-04-2010 |
20100050614 | System and method for selective catalytic reduction control - A selective catalytic reduction (SCR) catalyst control system and method for an engine is disclosed. Urea injection to an SCR catalyst is determined based on an SCR catalyst model, which determines a value of stored NH | 03-04-2010 |
20100058743 | EXHAUST GAS CLEANING SYSTEM FOR DIESEL ENGINE - Each time a starting process for a diesel engine | 03-11-2010 |
20100064669 | O3 PRODUCTION APPARATUS AND EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to produce O | 03-18-2010 |
20100071352 | VARIABLE EXHAUST GAS DEFLECTOR - A variable exhaust gas flow deflector for an internal combustion engine is disclosed. The deflector can include a blade located at least partially within an exhaust gas flow of the engine, the blade having a first position and a second position. The blade can move between the first position and the second position as a function of at least one parameter and/or condition of the exhaust gas and/or the internal combustion engine. | 03-25-2010 |
20100071353 | Exhaust Tract for an Internal Combustion Engine - An exhaust tract for an internal combustion engine of a motor vehicle includes a first exhaust gas line, which conducts exhaust gases from the internal combustion engine to an exhaust-gas treatment device, and a second exhaust gas line, which forms a bypass line bypassing the exhaust gas treatment device. In order to ensure sufficient treatment of the exhaust gas even in the lean operating mode of an internal combustion engine, at least one first valve and one second valve are provided in series in the bypass line. An exhaust line is provided between the first valve and the second valve to reduce the pressure between the first and second valves. The pressure upstream of the second valve and the pressure downstream of the second valve, or the ambient pressure of the motor vehicle, are determined and negative pressure is applied to the exhaust line such that an exhaust gas flow via the second valve to the outside into the environment of the motor vehicle is prevented. | 03-25-2010 |
20100077735 | EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas control apparatus for an internal combustion engine includes: a catalyst that is provided in an exhaust system of an internal combustion engine; a HC adsorption member that is provided in the exhaust system at a position downstream of the catalyst, and that has a function of adsorbing hydrocarbon in exhaust gas; a secondary air supply device that supplies secondary air to the exhaust system at a portion upstream of the catalyst; a supply prohibition unit that prohibits supply of the secondary air when the internal combustion engine is started; and a supply start time control unit that controls the time when supply of the secondary air is started after the internal combustion engine is started based on the amount of hydrocarbon discharged from the internal combustion engine or a value correlated with the amount of hydrocarbon discharged from the internal combustion engine. | 04-01-2010 |
20100089040 | EXHAUST EMISSION PURIFIER OF INTERNAL COMBUSTION ENGINE - An electronic control unit | 04-15-2010 |
20100089041 | METHOD AND ARRANGEMENT FOR MAINTAINING A DIESEL PARTICULATE FILTER IN A DIESEL ENGINE EXHAUST SYSTEM - A method and apparatus for maintaining a diesel particulate filter (DPF) is provided. A pressure drop across the DPF is measured and an initial estimate of soot loading in the DPF is provided to a recursive filter. Using the recursive filter, the initial estimate of soot loading is updated in view of the measured pressure drop to provide an updated estimate of soot loading in the DPF. Active regeneration of the DPF is triggered when an earliest one of at least one triggering condition occurs, the updated estimate of soot loading reaching a predetermined value being one of the at least one triggering condition. | 04-15-2010 |
20100095655 | ZONED ELECTRICAL HEATER ARRANGED IN SPACED RELATIONSHIP FROM PARTICULATE FILTER - A system comprises a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas and a downstream end. A zoned heater is arranged spaced from the upstream end and comprises N zones, where N is an integer greater than one, wherein each of the N zones comprises M sub-zones, where M is an integer greater than one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones. | 04-22-2010 |
20100095656 | EXHAUST GAS CLEANING SYSTEM FOR CONSTRUCTION MACHINE - Before a large amount of PM is deposited in a filter, an exhaust gas cleaning system for a construction machine regenerates the filter. | 04-22-2010 |
20100107610 | Exhaust System for an Internal Combustion Engine - An exhaust system ( | 05-06-2010 |
20100115927 | EXHAUST 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 desorb predetermined components contained in exhaust gas from adsorption means for adsorbing the components and can successfully purify the desorbed components, even during the stop of the internal combustion engine. A main exhaust passage | 05-13-2010 |
20100115928 | AQUEOUS UREA SOLUTION FEED DEVICE OF AN INTERNAL COMBUSTION ENGINE - An internal combustion engine wherein when an aqueous urea solution should be fed from an aqueous urea solution feed valve ( | 05-13-2010 |
20100126148 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A technique is provided that enables reducer concentrations in exhaust gas flowing into an exhaust purification device on the upstream side and an exhaust purification device on the downstream side provided to an exhaust pipe in series to be controlled separately with a simple configuration. Included are the two exhaust purification devices provided to an exhaust passage in series, a bypass passage that bypasses the exhaust purification device on the upstream side, an exhaust control valve provided to the bypass passage, and reducer supply means provided on the upstream side of a branch portion. A reducer is supplied intermittently from the reducer supply means to periodically change the reducer concentration in the exhaust gas, and the exhaust control valve is opened or closed periodically at a predetermined timing with respect to the change in the reducer concentration. Accordingly, the supplied reducer is distributed to be introduced to the exhaust purification device on the upstream side or to be introduced to the exhaust purification device on the downstream side via the bypass passage. | 05-27-2010 |
20100126149 | SECONDARY AIR SUPPLY SYSTEM AND SECONDARY AIR SUPPLYING METHOD OF INTERNAL COMBUSTION ENGINE - A secondary air supply system includes a secondary air supply device that supplies secondary air to the upstream side of an exhaust emission control device installed in an exhaust system of an internal combustion engine, and an ECU that estimates the secondary air temperature, and estimates the exhaust gas temperature after supply of secondary air, based on the result of estimation. The ECU starts or inhibits supply of secondary air by the secondary air supply device, depending on the result of estimation of the exhaust gas temperature. It is thus possible to prevent discharge of unburned fuel components, by estimating the exhaust gas temperature after supply of secondary air in view of the secondary air temperature. | 05-27-2010 |
20100132338 | THERMAL MANAGEMENT OF UREA DOSING COMPONENTS IN AN ENGINE EXHAUST AFTER-TREATMENT SYSTEM - Dosing components ( | 06-03-2010 |
20100132339 | EXHAUST GAS SYSTEM - The invention concerns an exhaust gas system ( | 06-03-2010 |
20100139255 | Construction Machine - [PROBLEM] To provide a construction machine capable of performing necessary operation or operations without a difficulty even when a remaining amount of a reducing agent becomes small. | 06-10-2010 |
20100146945 | Exhaust Purification System for Internal Combustion Engine - The present invention provides a technology enabling regeneration of the purification performance of an exhaust purification device more reliably and more efficiently in an exhaust purification system combining a plurality of branch passages bifurcating from an exhaust passage and an exhaust purification device provided in each branch passage. When regenerating the purification performance of a first exhaust purification device provided in a first branch passage, a second valve provided in a second branch passage is set at a predetermined first intermediate opening and a first valve provided in the first branch passage is fully closed. Fuel is then added from a first fuel addition valve provided in the first branch passage. | 06-17-2010 |
20100146946 | DEVICE FOR USE IN EXHAUST AFTERTREATMENT SYSTEM - A device for use in an exhaust aftertreatment system for an internal combustion engine is provided. The device comprises a particulate filter system having a particulate filter (DPF) for the collection of particles from the engine and a heating unit for the intermittent burning of soot at a temperature suitable for soot combustion. The particulate filter system is arranged to switch between an operating mode for the collection of soot and an operating mode for active regeneration. A bypass line extends between the inlet and outlet of the particulate filter system. A valve disposed in the bypass line allows opening or closing of an exhaust gas flow through the bypass line, in dependence on the operating mode of the particulate filter system, by a control member. | 06-17-2010 |
20100154390 | EXHAUST GAS PURIFICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A reducing agent addition valve is arranged in a position in which at least part of a reducing agent added to an exhaust gas in an exhaust passage at a location upstream of a precatalyst reaches the precatalyst in the state of liquid, and the reducing agent is supplied in a more suitable state to an exhaust gas purification device which is arranged in the exhaust passage at a downstream side of the precatalyst. When the addition of the reducing agent is performed by the reducing agent addition valve, the flow rate of the exhaust gas flowing into the precatalyst is decreased so that at least part of the reducing agent, which has reached the precatalyst and has vaporized in the precatalyst, is caused to flow back. | 06-24-2010 |
20100162689 | CONTROL DEVICE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - In a region where the engine load is less than a first predetermined value, only a second exhaust valve that opens and closes a second exhaust passageway that bypasses a turbine of a supercharger is opened. In a region where the engine load is greater than or equal to the first predetermined value and less than a second predetermined value, both the second exhaust valve and a first exhaust valve that opens and closes a first exhaust passageway that leads to the turbine are opened. In a region where the engine load is greater than or equal to the second predetermined value, only the first exhaust valve is opened. A predetermined value for the time of lean combustion is set lower than a predetermined value for the time of stoichiometric combustion. | 07-01-2010 |
20100170228 | METHOD AND APPARATUS FOR TRUCK HEATED DUMP BODY - A control device for a truck dump body heating system includes a valve for controlling an exhaust gas flow to either an exhaust stack or an inlet to the dump body heating conduit. The valve may be manually controlled by the operator to select between the exhaust and heating functions. An override detects whether a diesel particulate filter regeneration is being performed, and responsive thereto, causes the valve to direct exhaust gas to the stack, preventing excessive heating of the dump body. | 07-08-2010 |
20100186387 | Soot Reduction By Combustor Conditioning - A method of affecting soot particulate size in an internal combustion engine exhaust by selectively providing a phosphorous based additive to the engine during combustion. Soot particulate size can be increased or decreased depending on the particular additive provided. Also disclosed in a conditioning effect experienced by using a phosphorous based additive for a period of time. A conditioned engine can also have its exhaust properties affected during the life of its conditioned state. Manipulating particle size during engine operation can employ an oligomeric phosphorous compound. Engine conditioning can employ a monomeric phosphorous containing compound, an oligomeric phosphorous containing compound, a polymeric phosphorous containing compound, or combinations thereof. | 07-29-2010 |
20100192548 | SYSTEM AND METHOD TO REGENERATE A DIESEL PARTICULATE FILTER - An exhaust system for use with a diesel engine includes a diesel particulate filter configured to capture particulate matter exhausted from the diesel engine, a first sensor operable to detect a particulate matter accumulation level within the diesel particulate filter, and a second sensor operable to detect an ambient temperature of an environment surrounding the diesel particulate filter. The exhaust system also includes a control module electrically coupled to the first sensor, the second sensor, and the diesel particulate filter. The control module is operable to adjust a first regeneration threshold based on the detected ambient temperature. The control module is also operable to initiate regeneration of the diesel particulate filter when the detected particulate matter accumulation level reaches the first regeneration threshold. | 08-05-2010 |
20100192549 | METHOD AND SYSTEM FOR CONTROLLING AN ELECTRICALLY HEATED PARTICULATE FILTER - A method and system for controlling a diesel particulate filter includes a particulate matter load determination module determining a particulate matter load in a diesel particulate filter (DPF), a desired oxygen level determination module determining a desired exhaust gas oxygen level based on the particulate matter load, an oxygen comparison module comparing the desired exhaust gas oxygen level and a measured exhaust gas oxygen level and generating a comparison signal and an electric DPF control module controlling an electrically heated catalyst in response to the comparison signal. | 08-05-2010 |
20100192550 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to prevent an excessive temperature rise of a precatalyst in the case where the precatalyst is provided in the exhaust passage upstream of an exhaust gas purification apparatus and has a heat capacity smaller than that of the exhaust gas purification apparatus, and reducing agent is added from a reducing agent addition valve toward an upstream end surface of the precatalyst. According to the present invention, the reducing agent addition valve is located in such a way that the reducing agent added through it reaches the precatalyst in a liquid state. In the case where the level of activity of the precatalyst is higher than a specific level at the time when the addition of reducing agent through the reducing agent addition valve is performed so as to supply the reducing agent to the precatalyst and the exhaust gas purification apparatus, the reducing agent is added more intensively than in the case where the level of activity of the precatalyst is not higher than the specific level. | 08-05-2010 |
20100199644 | Exhaust treatment diagnostic system and method - A method and system for monitoring operation of an exhaust treatment system of a diesel engine includes a dosing system for injecting an injection fluid and a temperature sensor generating temperature signals corresponding to exhaust temperatures. A control module determines a temperature change after an injection of injection fluid based on the temperature signals, compares the temperature change to a threshold, and generates a fault signal in response thereto. | 08-12-2010 |
20100212299 | METHODS FOR DETERMINING WHEN TO REGENERATE EXHAUST GAS PARTICULATE FILTERS - Methods for determining when to regenerate an exhaust gas particulate filter ( | 08-26-2010 |
20100212300 | Exhaust Purification With On-Board Ammonia Production - A method of operating an engine system comprising operating a first cylinder group at a first number of strokes per combustion cycle, operating a second cylinder group at a second number of strokes per combustion cycle, the second number of strokes per cycle being different than the first number of strokes per cycle. | 08-26-2010 |
20100218487 | MODEL-BASED DIAGNOSTICS OF NOX SENSOR MALFUNCTION FOR SELECTIVE CATALYST REDUCTION SYSTEM - Methods and systems for detecting faults with nitrogen oxides sensors used to detect the presence of nitrogen oxides in an exhaust effluent gas stream emitted from a combustion engine during its operation include providing a virtual nitrogen oxides sensor measurement compared with actual nitrogen oxides content measured by nitrogen oxides sensors. | 09-02-2010 |
20100223915 | INTERNAL COMBUSTION ENGINE AND VEHICLE INCORPORATING SAME - An internal combustion engine includes a main enlarged member extended towards a camshaft for forming reed valve chambers. The main enlarged member is integrally provided on a head cover of the engine at a location at which reed valves for controlling supply of secondary air to an exhaust system are disposed. The main enlarged member is extended towards the camshaft for increasing volume of the reed valve chambers while avoiding the increase in size of the head cover. A recessed portion is provided on a cam cap fastened to a cylinder head of the engine. A portion of the main enlarged member is inserted into the recessed portion such that cam cap cooperates with the cylinder head for rotatably supporting the camshaft. | 09-09-2010 |
20100236223 | EXHAUST GAS APPARATUS AND METHOD FOR THE REGENERATION OF A NOX TRAP AND A PARTICLE FILTER - Exhaust gas apparatus for the cleaning of exhaust gas where the exhaust gas apparatus comprises an exhaust conduit section which is formed with at least two separate flow paths. Each flow path is provided with a particle filter for the removal of particulate matter from the exhaust gas, an NOx trap for the removal of NOx from the exhaust gas. The exhaust gas apparatus further comprises at least one cold flame vaporizer in which fuel is partially oxidized in preheated air to form a cold flame gas where the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap, and valve means for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section. Thereby, both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation. There is also provided a method for regenerating cleaning means for exhaust gas where the cleaning means comprises an NOx trap and possibly a particle filter. | 09-23-2010 |
20100251700 | HC-SCR System for Lean Burn Engines - Systems and methods for abating NOx emission in an exhaust stream are provided. Systems comprising hydrocarbon conversion over a partial oxidation catalyst in a slip stream and a hydrocarbon selective catalytic reduction catalyst are described. The emissions treatment system is advantageously used for the treatment of exhaust streams from lean burn engines including diesel engines, lean burn gasoline engines and locomotive engines. | 10-07-2010 |
20100269490 | APPARATUS FOR AND METHOD OF PURIFYING EXHAUST GAS - An exhaust gas pressure P, exhaust gas temperatures T | 10-28-2010 |
20100287912 | PREDICTING ASH LOADING USING AN ELECTRICALLY HEATED PARTICULATE FILTER - A control system includes a heater control module, a measured duration module, and a regeneration volume module. The heater control module selectively initiates a regeneration in a zone of a particulate filter in an exhaust system. The measured duration module measures a duration of the regeneration. The regeneration volume module determines an available volume within the particulate filter to regenerate particulate based on the measured duration of the regeneration. | 11-18-2010 |
20100287913 | INTERNAL COMBUSTION ENGINE EXHAUST GAS CLEANING APPARATUS AND EXHAUST GAS CLEANING METHOD - An internal combustion engine exhaust gas cleaning apparatus is basically provided with a NOx trapping catalytic converter, a sulfur poisoning amount estimating section and a sulfur poisoning removal section. The NOx trapping catalytic converter is arranged in an exhaust passage to trap NOx contained in an exhaust gas flowing through the exhaust passage when an air-fuel ratio of the exhaust gas is lean and to release trapped NOx when an air-fuel ratio of the exhaust gas is rich. The sulfur poisoning amount estimating section estimates an estimated sulfur poisoning amount of sulfur poisoning of the NOx trapping catalytic converter based on a fuel consumption amount and an oil consumption amount. The sulfur poisoning removal section raises a temperature of the NOx trapping catalytic converter to a sulfur poisoning removal temperature based on the estimated sulfur poisoning amount to remove sulfur poisoning from the NOx trapping catalytic converter. | 11-18-2010 |
20100287914 | EXHAUST PURIFYING DEVICE OF INTERNAL COMBUSTION ENGINE - An internal combustion engine in an engine exhaust passage of which an NO | 11-18-2010 |
20100313552 | EXHAUST EMISSION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust emission control apparatus that is used with an internal combustion engine to use both a NOx retention member and a catalyst while avoiding a decrease in the exhaust gas purification capacity. A NOx occlusion reduction type catalyst is placed in an exhaust path of an internal combustion engine. The NOx occlusion reduction type catalyst includes a base material. The base material includes an exhaust inflow cell, which is closed at its downstream side; and an exhaust outflow cell, which is closed at its upstream side and is adjacent to the first cell with the partition wall positioned in between. The exhaust inflow cell is configured so that a NOx retention layer is formed on the inner surface thereof, and the exhaust outflow cell is configured so that a catalyst layer is formed on the inner surface thereof, respectively. | 12-16-2010 |
20100326057 | Exhaust Gas Purification Device - An exhaust gas purification device ( | 12-30-2010 |
20110041481 | Method of controlling nox purification system, and nox purification system - Provided is a method of controlling a NOx purification system configured to reduce NOx contained in an exhaust gas by including an oxidation catalyst device ( | 02-24-2011 |
20110047987 | EXHAUST EMISSION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust emission control system of an internal combustion engine includes: a bypass passage ( | 03-03-2011 |
20110067384 | EXHAUST EMISSION PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an exhaust emission purifying apparatus for an internal combustion engine, for adding a reducing agent for NO | 03-24-2011 |
20110067385 | EXHAUST EMISSION PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an exhaust emission purifying apparatus for an internal combustion engine, for adding a reducing agent for NO | 03-24-2011 |
20110072801 | EXHAUST TREATMENT SYSTEM FOR INTERNAL COMBUSTION ENGINE - Methods and systems are provided for operating an engine including an exhaust treatment system coupled to an engine exhaust, the exhaust treatment system further coupled to an engine intake via an exhaust gas recirculation (EGR) system. One example method comprises, operating in a first mode including routing exhaust gas through the exhaust treatment system to an exhaust tailpipe; operating in a second mode including routing exhaust gas through the exhaust treatment system to an engine intake via the EGR system, and operating in a third mode including routing exhaust gas to an engine intake through the EGR system while bypassing the exhaust treatment system. | 03-31-2011 |
20110072802 | PARTICULATE FILTER REGENERATION IN AN ENGINE - Systems and methods for controlling regeneration of a particulate filter positioned downstream of an engine in a vehicle are provided herein. One exemplary method includes, during combusting engine conditions, directing exhaust from the engine to a three-way catalyst and then to a particulate filter positioned downstream of the three-way catalyst. The method also includes, during non-combusting engine conditions and while the vehicle is in motion, directing fresh ram-air to the particulate filter to regenerate the particulate filter. | 03-31-2011 |
20110072803 | METHOD FOR ADJUSTING BOOST PRESSURE WHILE REGENERATING A PARTICULATE FILTER FOR A DIRECT INJECTION ENGINE - A method for regenerating a particulate filter is disclosed. In one example, oxygen is pumped from the intake system of a direct injection turbocharged gasoline engine to the exhaust system by a compressor. The oxygen is introduced to a particulate filter at a location upstream from the particulate filter and downstream of a three-way catalyst. The oxygen may be regulated in part by adjusting compressor boost pressure in response to a state of particulate filter regeneration. Further, in one embodiment, engine NOx can be controlled by EGR. | 03-31-2011 |
20110072804 | SYSTEM FOR REGENERATING A PARTICULATE FILTER AND CONTROLLING EGR - A system for regenerating a particulate filter is disclosed. In one example, oxygen is pumped from the intake system of a direct injection turbocharged gasoline engine to the exhaust system by a compressor. Simultaneously, exhaust gases may be pumped from the exhaust system to the intake system for the purpose of reducing NOx while regenerating a particulate filter. | 03-31-2011 |
20110079000 | Process for starting an SCR system - Process for starting an SCR system intended for transporting urea from a tank to the exhaust gases of an engine using a feed line, this system comprising a rotary pump controlled by a controller and driven by a brushless direct current (BLDC) motor that comprises a rotor equipped with at least one permanent magnet and with a stator comprising at least 3 electromagnetic coils in which the direct current can flow according to a given sequence to make the rotor rotate, according to which, before starting the pump, a temperature is measured using a sensor and if this temperature is below a setpoint temperature, before making the rotor rotate, the current is passed through at least one of the coils in a way such that it preheats the pump without making the rotor rotate. | 04-07-2011 |
20110083427 | EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine exhaust purification apparatus includes a filter configured to collect particulate matter contained in exhaust gas, a selective catalytic reduction converter provided downstream of the filter to reduce nitrogen oxide contained, an oxidation catalyst converter with an adsorption function provided upstream of the converter to temporarily adsorb the nitrogen oxide contained in the exhaust gas, a burner configured to increase the temperature of the exhaust gas flowing into the filter, the selective catalytic reduction converter, and the oxidation catalyst converter to set the temperature of the filter to at least a predetermined recovery temperature, thus recovering the filter, and an ECU configured to inhibit the burner from being started when the burner is otherwise to be started but if the selective catalytic reduction converter has not been activated. | 04-14-2011 |
20110094209 | METHOD FOR CORRECTING NITROGEN OXIDE EMISSION MODELS - The invention relates to a method for correcting a model for determining the amount of reducing agent to inject for the selective catalytic reduction of nitrogen oxides contained in exhaust gases, which includes the following steps: determining an amount of reducing agent to inject based on the amount of nitrogen oxides emitted and an initial mathematical model; determining, by taking a measurement from the catalyst of the amount and/or nature of the gas, whether or not the reducing reaction is carried out under correct conditions; if an anomaly is detected, adjusting the amount of reducing agent to inject; and if the use of said method leads to a number of repeated adjustments of the same nature greater than a predetermined value N: the mathematical model is corrected, and the initial mathematical model is replaced by the corrected model. | 04-28-2011 |
20110099985 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An exhaust purification system is provided that can continuously maintain a NOx purification rate to be high while suppressing the occurrence of ammonia slip. The exhaust purification system includes a slip determination portion | 05-05-2011 |
20110120099 | SYSTEMS AND METHODS FOR REDUCING NOx BREAKTHROUGH - An exhaust system includes main line that runs through a three way converter (TWC) and then a lean NO | 05-26-2011 |
20110126524 | ENGINE EXHAUST SYSTEM HAVING A PLURALITY OF DIESEL PARTICULATE FILTERS - An exhaust system for an internal combustion engine comprises a turbocharger, an exhaust pipe, a first diesel particulate filter, a second diesel particulate filter, and a flow control valve. The exhaust pipe has a first portion, a second portion, and a third portion. At least the second portion of the exhaust pipe comprises a plurality of fluid paths. The first diesel particulate filter is coupled to on one of the plurality of fluid paths between the second portion and the third portion of the exhaust pipe. The second diesel particulate filter is coupled to another of the plurality of fluid paths. The flow control valve is disposed within the second portion of the exhaust pipe. The flow control valve is response to an input signal indicative of an operating condition and is configured to control exhaust flow to the first diesel particulate filter and the second diesel particulate filter in response to the input signal. | 06-02-2011 |
20110126525 | NOVEL SCR CATALYSTS AND AFTER-TREATMENT DEVICES FOR DIESEL ENGINE EXHAUST GAS - Disclosed is an SCR catalyst composition having improved NOx conversion and a device for post-treating diesel engine exhaust gas using the same. The SCR catalyst composition can effectively convert NOx generated from an engine into harmless components. The device, which improves the NOx conversion, includes an SCR catalyst module disposed downstream of a diesel engine and having an injector, an oxidation catalyst module disposed downstream of the SCR catalyst module, and a catalyst soot filter module, all of which are successively arranged in series. | 06-02-2011 |
20110138786 | Exhaust-Cleaning Device For Internal Combustion Engines Besides a Vehicle Comprising Such an Exhaust-Cleaning Device and an Extension for Exhaust-Cleaning Devices - An exhaust-cleaning device for internal combustion engines having varying exhaust amount, which is intended to constitute a part of an exhaust system co-operating with an engine includes a main converter and a pre-converter located upstream the main converter, seen in the direction that exhaust fumes are intended to pass the exhaust-cleaning device. The exhaust-cleaning device is distinguished by a bypass arranged in the area of the pre-converter. The bypass includes a first opening upstream the pre-converter, and a second opening downstream the pre-converter and upstream the main converter, so that at least a part of the exhaust fumes passes past the pre-converter without passing therethrough. An extension for an exhaust-cleaning device and a vehicle including such an exhaust-cleaning device are disclosed. | 06-16-2011 |
20110192148 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine is provided. A selective reduction catalyst is disposed in an exhaust passage of the engine for reducing NOx in exhaust gases from the engine under existence of a reducing agent. The reducing agent or a reactant for generating the reducing agent is supplied to the upstream side of the selective reduction catalyst. Occurrence of a reducing-agent slip in which the reducing agent is discharged to the downstream side of the selective reduction catalyst is determined. A storage amount indicative of an amount of the reducing agent stored in the selective reduction catalyst is temporarily reduced from the state where the storage amount is at the maximum, and thereafter the storage amount is increased until the occurrence of the reducing-agent slip is detected. An accuracy of the reducing agent supply is determined according to an occurrence state of the reducing agent slip when the storage amount is changed. | 08-11-2011 |
20110192149 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine is provided. A selective reduction catalyst is disposed in an exhaust passage of the engine for reducing NOx in exhaust gases from the engine under existence of a reducing agent. The reducing agent or a reactant for generating the reducing agent is supplied to the upstream side of the selective reduction catalyst. Occurrence of a reducing-agent slip in which the reducing agent is discharged to the downstream side of the selective reduction catalyst is determined. A storage amount indicative of an amount of the reducing agent stored in the selective reduction catalyst is temporarily reduced from the state where the storage amount is at the maximum, and thereafter the storage amount is increased until the occurrence of the reducing-agent slip is detected. A supply correction amount for correcting an amount of the reducing agent is calculated according to an occurrence state of the reducing agent slip when the storage amount is changed. A basic supply amount of the reducing agent is calculated according to an operating condition of the engine or a NOx concentration on the upstream side of the selective reduction catalyst. A supply amount of the reducing agent is calculated by correcting the basic supply amount using the supply correction amount. | 08-11-2011 |
20110219753 | PARTICULATE FILTER SYSTEM - A device for filtering particulates from an exhaust gas feedstream of an internal combustion engine includes a filter substrate having a multiplicity of alternately closed parallel flow passages having porous walls oriented parallel to a flow axis of the exhaust gas between an inlet and an outlet thereof, wherein subsets of the flow passages are associated with respective ones of a plurality of zones, a flow control valve to control flow of exhaust gas to each of the plurality of zones, a multi-zone heating element including a plurality of individually activated heating elements each corresponding to one of the plurality of zones. | 09-15-2011 |
20110219754 | EXHAUST GAS PURIFICATION APPARATUS OF AN INTERNAL COMBUSTION ENGINE - A gas additive and a liquid additive are supplied efficiently. There are provided a liquid supply device that stores a liquid additive and supplies the liquid additive into an exhaust passage of an internal combustion engine, a gas supply device that stores a gas additive and supplies the gas additive into the exhaust passage, a catalyst that is arranged in the exhaust passage at a downstream side of locations at which the additives are supplied from the liquid supply device and the gas supply device, respectively, with the additives reacting in the catalyst, and an adjustment device that adjusts an amount of the liquid additive to be added from the liquid supply device and an amount of the gas additive to be added by the gas supply device in accordance with a rule defined beforehand. | 09-15-2011 |
20110219755 | EXHAUST-GAS PURIFICATION SYSTEM FOR DIESEL ENGINES - An exhaust gas purification system for diesel engines includes at least one oxidation catalytic converter, a reducing agent injection device and a reduction catalytic converter disposed together in a housing having a first lateral chamber close to a first end side and a second lateral chamber close to a second end side. The reduction catalytic converter is disposed in the first lateral chamber, the oxidation catalytic converter is disposed in an outer annular space of the second lateral chamber and the reducing agent injection device is oriented toward an inner channel of the outer annular space of the second lateral chamber. A flow path for the exhaust gas from at least one exhaust gas inlet toward at least one exhaust gas outlet is provided through the oxidation catalytic converter, the reducing agent injection device and the reduction catalytic converter. | 09-15-2011 |
20110265461 | ABNORMALITY DETECTION APPARATUS FOR EXHAUST GAS PURIFICATION APPARATUS AND ABNORMALITY DETECTION METHOD FOR EXHAUST GAS PURIFICATION APPARATUS - It is determined quickly whether there is a shortage in reducing agent supplied to an NOx selective reduction catalyst. After it is determined that a quantity of reducing agent equal to or larger than a predetermined quantity is absorbed in the NOx selective reduction catalyst on the assumption that there is no abnormality in reducing agent supply unit, the supply of a quantity of reducing agent needed to reduce a quantity of NOx flowing into the NOx selective reduction catalyst is started. A determination of an abnormality in the reducing agent supply unit is made based on the NOx removal rate after the lapse of a predetermined period of time since the start of the supply of reducing agent. The NOx removal rate becomes lower when there is an abnormality in the reducing agent supply unit. | 11-03-2011 |
20110271661 | HEAT EXCHANGER METHOD AND APPARATUS FOR ENGINE EXHAUST GAS RECIRCULATION SYSTEM - A method for operating an internal combustion engine configured to operate lean of stoichiometry includes reducing temperature of a portion of an exhaust gas feedstream recirculated to an intake system of the engine, and reducing mass flowrate of particulate matter and hydrocarbons borne in the recirculated portion of the exhaust gas feedstream upstream of the heat exchanger effective to reduce deposition of particulate matter and hydrocarbons onto and adhesion to surface areas of the heat exchanger. | 11-10-2011 |
20110277453 | METHOD FOR CONTROLLING FRESH AIR INJECTION INTO THE EXHAUST OF AN INTERNAL-COMBUSTION ENGINE, NOTABLY OF A MOTOR VEHICLE - The present invention relates to a method for controlling air injection into the exhaust of an internal-combustion engine running on a cycle during which the expansion phase (D) thereof has a greater stroke than the compression phase (C) thereof and comprising at least one cylinder ( | 11-17-2011 |
20120006011 | INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - The present invention relates to an internal combustion engine having an injector which functions as a a positive displacement pump and dispenses an amount of lubricant fixed for each and every operation of the injector. The fluid dispensed could be a lubricant delivered directly to crankshaft bearings, camshaft bearings, tappets or cylinder sleeve. Alternatively the fluid could be fuel, water or urea delivered to an exhaust system upstream of a catalytic converter. The injector can have a one-way valve with a valve element having a domed or conical surface for directing fluid flow across a sharp edge which induces turbulence in the fluid flow. | 01-12-2012 |
20120036841 | FUEL PROCESSOR WITH IMPROVED CARBON MANAGEMENT CONTROL - A method of regenerating a particulate filter which traps particulate matter contained in a product stream of a fuel processor. The method comprises a step which predicts the value of a parameter indicative of carbon accumulation in the particulate filter during operation of the fuel processor. When the predicted value meets or exceeds a first threshold value a regeneration process is initiated. Optionally, after a certain time or when the predicted value meets or falls below a second threshold value, the regeneration process is ceased. | 02-16-2012 |
20120036842 | EXHAUST PURIFICATION DEVICE FOR ENGINE - The present invention provides an exhaust purification device for an engine, comprising: an ammonia supply system including an ammonia supply injector for supplying ammonia to a combustion chamber and a control unit for controlling the ammonia supply injector, and a NOx purification system provided in an exhaust passage and including a Selective Catalytic Reduction catalyst being able to fulfill a function for purifying NOx under the presence of the ammonia. | 02-16-2012 |
20120042636 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - The exhaust purification system of an internal combustion engine is provided with an NO | 02-23-2012 |
20120060482 | PARTICULATE FILTER AND HYDROCARBON ADSORBER BYPASS SYSTEMS - A regeneration system includes a first comparison module that at least one of (i) compares a first temperature of an adsorber to an adsorber release temperature and (ii) compares a second temperature of an engine to a predetermined temperature, and generates a first comparison signal. A second comparison module that compares a particulate matter output of the engine with a predetermined output and generates a second comparison signal. A mode selection module that selects a mode and generates a mode signal based on the first comparison signal and the second comparison signal. A bypass valve control module that adjusts position of a bypass valve to bypass at least one of a particulate matter (PM) filter and the adsorber based on the mode signal. | 03-15-2012 |
20120073270 | EXHAUST SYSTEM AND RETROFITTING METHOD - A method of retrofitting an engine with an exhaust system is disclosed. The method may include placing an exhaust treatment device in an exhaust duct of the engine, and placing an exhaust heater in fluid communication with the exhaust duct of the engine at a location upstream of the exhaust treatment device. The method may further include connecting an air supply passage at a first end to an inlet duct of the engine at a location downstream of a compressor and at a second end to the exhaust heater. The method may additionally include placing a restrictor valve in the inlet duct of the engine at a location downstream of the first end of the air supply passage. | 03-29-2012 |
20120090303 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside of an engine exhaust passage, a hydrocarbon feed valve ( | 04-19-2012 |
20120102927 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine is provided with a first NO | 05-03-2012 |
20120110985 | METHOD AND CONTROL SYSTEM FOR A VALVE - A method of controlling a valve and a control system in a machine having an internal combustion engine, the system including the valve and an associated motor, and a temperature sensor that supplies a temperature signal to a controller in electrical communication with the motor. The controller supplies a closing current to the motor at a temperature signal corresponding to a temperature no greater than a preset temperature parameter, the closing current being at or above a nominal operating current of the motor and being furnished for a preset period of time. | 05-10-2012 |
20120117951 | SELECTIVE CATALYTIC REDUCTION CATALYST AMMONIA STORAGE CONTROL SYSTEMS AND METHODS - A control system for a vehicle includes a location identification module, an adjustment triggering module, and an adjustment module. The location identification module identifies a location where an engine of the vehicle is expected to be shut down and later re-started with at least one temperature within a predetermined range of an ambient temperature at the time of the re-start. The adjustment triggering module generates a triggering signal when a vehicle location provided by a global positioning system (GPS) is less than a predetermined distance from the identified location. The adjustment module selectively one of increases and decreases a rate at which a dosing agent is injected into an exhaust system, upstream of a selective catalytic reduction (SCR) catalyst, when the triggering signal is generated. | 05-17-2012 |
20120124973 | Method for Predicting NOx Amount and Exhaust System Using the Same - A method for predicting a NOx amount, may include determining a reference NOx amount according to a driving condition of an engine, primarily correcting the reference NOx amount according to an exhaust gas recirculation (EGR) ratio, and secondarily correcting the primarily corrected NOx amount according to an environmental factor and the driving condition. | 05-24-2012 |
20120137663 | METHOD FOR PREDICTING NOX LOADING AT DENOX CATALYST AND EXHAUST SYSTEM USING THE SAME - A method is provided for predicting NOx loading at a DeNOx catalyst by which a NOx amount actually stored in the DeNOx catalyst can be precisely predicted and to an exhaust system which controls a regeneration timing of the DeNOx catalyst and amount of a reducing agent which is injected by using the method. The method may include calculating mass flow of NOx stored at the DeNOx catalyst, calculating mass flow of NOx thermally released from the DeNOx catalyst, calculating mass flow of NOx chemically released from the DeNOx catalyst, and calculating NOx amount actually stored at the DeNOx catalyst by using the mass flow of NOx stored at the DeNOx catalyst, the mass flow of NOx thermally released from the DeNOx catalyst, and the mass flow of NOx chemically released from the DeNOx catalyst. | 06-07-2012 |
20120144808 | SCR EXHAUST GAS AFTERTREATMENT DEVICE - An SCR exhaust gas aftertreatment device in which a urea-water solution is injected into an exhaust gas line is provided. At least one component of the device (e.g., a filter element) lies in an area of an internal space, and is bounded by an elastomer membrane that is embedded in a frost equalization foam. This prevents freezing damage even over a very long period of time and a large number of freezing cycles. | 06-14-2012 |
20120174565 | REDUCING AGENT DELIVERY DEVICE WITH COMPENSATION ELEMENT, METHOD FOR COMPENSATING FREEZING OF A REDUCING AGENT IN A DELIVERY DEVICE AND MOTOR VEHICLE HAVING A DELIVERY DEVICE - A delivery device for delivering liquid reducing agent includes a reducing agent tank. At least a delivery unit, at least one first compensation element, a reducing agent line and a metering unit together have an overall volume to be filled with a reducing agent and are configured for delivering, conducting and metering the reducing agent from the reducing agent tank. The at least one first compensation element is configured for reducing the overall volume when a negative pressure occurs in the delivery device. A method for compensating freezing of a reducing agent in a delivery device and a motor vehicle having a delivery device, are also provided. | 07-12-2012 |
20120180460 | Exhaust-Gas Aftertreatment Device - An exhaust-gas aftertreatment device is provided, comprising a control unit for controlling a diaphragm pump that draws a urea/water solution out of a circuit and pumps it, via a pressure filter, to a metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream. The metering unit may also comprise a metering valve, including an atomizing nozzle, a pressure and temperature sensor, a heating means and a return baffle. | 07-19-2012 |
20120180461 | Reductant Storage Sensing System and Method - A catalyst supported on a substrate includes a heater embedded in a sub-region of the substrate to heat a local region of the catalyst. The amount of ammonia stored on the catalyst may be determined and controlled through conductivity measurements in the locally heated portion of the system described. | 07-19-2012 |
20120180462 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine has a selective reduction type NO | 07-19-2012 |
20120186237 | DELIVERY DEVICE AND TANK CONFIGURATION FOR A REDUCING AGENT AND MOTOR VEHICLE HAVING A TANK CONFIGURATION - A delivery device for a reducing agent includes a metallic housing, at least one externally mounted metal suction pipe and an external pressure port. A metallic base plate, at which at least one pump and ducts are provided, is disposed inside the housing. The suction pipe, the housing, the metallic base plate, and the pump are in heat-conducting contact with each other. An elongate heating element is disposed next to the suction pipe. A tank configuration for a reducing agent and a motor vehicle having a tank configuration, are also provided. | 07-26-2012 |
20120240560 | EXHAUST GAS FILTER - Provided is an exhaust gas filter, including: an external case connected with an exhaust pipe; a filtering unit provided in the external case; a filtering path supplying exhaust gas to the filtering unit; and a pressure relief flange provided in the external case to discharge exhaust gas by bypassing the filtering unit. | 09-27-2012 |
20120255286 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An exhaust purification system for an internal combustion engine is provided that can steadily maintain a NOx purification rate of a selective reduction catalyst to be high without allowing the fuel economy or marketability to deteriorate. The exhaust purification system includes a NO | 10-11-2012 |
20120279206 | DEVICE, METHOD, AND SYSTEM FOR EMISSIONS CONTROL - An exhaust gas treatment device includes a first substrate coated with a low temperature catalyst configured to facilitate formation of an oxidizer when an exhaust gas temperature is below a threshold temperature. The device further includes a second substrate coated with a high temperature catalyst and positioned coaxially with the first substrate, the high temperature catalyst configured to facilitate formation of the oxidizer when the exhaust gas temperature is above the threshold temperature. | 11-08-2012 |
20130025266 | STRATIFIED PARTICULATE FILTER REGENERATION SYSTEM - An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a hydrocarbon supply, a particulate filter (“PF”), at least one sensor, a first temperature sensor, a second temperature sensor, and a control module. The PF is in fluid communication with the exhaust gas conduit and has a filter structure for removal of particulates in the exhaust gas. The filter structure has an innermost region and an outermost region. The PF is selectively regenerated during operation of the internal combustion engine. The PF has a stratified temperature structure that causes the particulates trapped at the innermost region of the PF burn off before the particulates trapped in the outermost region of the PF during regeneration. The control module has a memory with an infinite stage temperature control curve stored thereon. | 01-31-2013 |
20130055701 | REDUCTANT DELIVERY APPARATUS WITH PURGING MEANS - A dosing apparatus with purging means for delivering reductant into an exhaust gas treatment system of an internal combustion engine. The apparatus includes a first Venturi T connector with two high pressure ports and a low pressure port, and a purge control valve for switching from normal dosing to purging by controlling flow through the two high pressure ports. The apparatus may also include a second Venturi T connector and a reductant supply chamber for purging reductant residue in its pump and reductant passage lines. The apparatus may further include a purging controller that triggers a purging event according to engine oil or coolant temperature and controls the purging process after a dosing process completes. | 03-07-2013 |
20130074479 | UREA HEATING SYSTEM AND HEATING METHOD THEREOF - A urea solution heating device prevents freezing of a urea solution by using exhaust gas of an engine. More particularly, a urea solution heating device may use a pressure difference between an exhaust gas pipe and a muffler to bypass the exhaust gas to exchange heat between the exhaust gas and the urea solution. The urea solution heating device may include an exhaust gas pipe, a muffler, a first bypass pipe diverged from the exhaust gas pipe, a urea solution tank to which the bypassed exhaust gas is supplied, a second bypass pipe connected to the muffler, and a heat exchanger, wherein the exhaust gas sequentially flows through the first bypass line, the heat exchanger, and the second bypass line by a pressure difference between the exhaust gas pipe and the muffler. An urea solution heating method is also described. | 03-28-2013 |
20130160432 | LIMITING NOX EMISSIONS - Apparatus for controlling an internal combustion engine limits emission of undesirable compounds of nitrogen and oxygen and provides increased transient power. | 06-27-2013 |
20130255234 | METHOD FOR OPERATING A REDUCING AGENT TANK AND MOTOR VEHICLE IN WHICH THE METHOD IS CARRIED OUT - A method for operating a tank for reducing agent, in particular aqueous urea solution, having a sensor with a first electrical contact and a second electrical contact, includes initially determining a conductance value for liquid reducing agent, a conductance value for frozen reducing agent and a conductance value for air in steps a. | 10-03-2013 |
20130255235 | METHOD FOR OPERATING AN EXHAUST-GAS TREATMENT DEVICE AND MOTOR VEHICLE HAVING THE DEVICE - A method for operating an exhaust gas treatment device having at least one heater and at least one supply device for a reducing agent includes initially carrying out a test in order to determine if the reducing agent is to be supplied, and subsequently implementing different heating strategies in each case. In the event that the reducing agent is to be supplied, the exhaust gas treatment device is heated with the heater until a first threshold temperature is reached, if a first temperature lies below the first threshold temperature. In the case when no reducing agent is to be fed, the exhaust gas treatment device is heated with the heater until a second threshold temperature is reached, if a second temperature lies below the second threshold temperature. A motor vehicle having the device is also provided. | 10-03-2013 |
20130291523 | Cooling System for Diesel Emissions Fluid Injector - A diesel emission fluid (DEF) injection system for a machine is disclosed. The machine includes a fan or a source of flowing air, as well as a first portion of an exhaust system coupled to an exhaust after-treatment device and a second portion of the exhaust system disposed below the exhaust after-treatment device. The DEF injection system includes a DEF line in selective communication with the first portion of the exhaust system as well as electrical components such as an electrically activated valve for injecting the DEF into the first portion of the exhaust system. To maintain the electrical components at acceptably low temperatures, a heat shield is disposed between the electrical components and the second portion of the exhaust system and an air duct is provided that communicates air from the fan or source of flowing air towards the electrical components for forced air cooling. | 11-07-2013 |
20140033687 | FUEL INJECTION CONTROL SYSTEM OF AN INTERNAL COMBUSTION ENGINE - The present invention has its object to provide a technique which can eliminate HC poisoning of an exhaust gas purification catalyst in a suitable manner in a fuel injection control system of an internal combustion engine which can use a liquid fuel and a gas fuel. In order to achieve this object, the present invention is constructed such that in the fuel injection control system of an internal combustion engine capable of using a liquid fuel and a gas fuel, when HC poisoning of the exhaust gas purification catalyst has occurred, HC poisoning is intended to be eliminated by causing the internal combustion engine to operate by the use of the gas fuel if the temperature of the exhaust gas purification catalyst is less than a specified value, whereas the elimination of HC poisoning is intended by causing the internal combustion engine to operate by the use of the liquid fuel if the temperature of an exhaust gas purification device is not less than the specified value. | 02-06-2014 |
20140182274 | UREA-WATER ADDITION CONTROL UNIT - A control portion sets a total injection amount of a urea water injected from an injector to an exhaust gas, and controls to open or close the injector based on the injection amount. An injection-amount correcting portion estimates an injection characteristic of the injector from an injection-amount difference between the total injection amount and a decreased amount of the urea water in a tank, and corrects a command value of a control signal outputted to the injector based on the injection characteristic. Therefore, the injection amount is corrected by considering the individual differences or the age-related deterioration. | 07-03-2014 |
20140311135 | INTERNAL COMBUSTION ENGINE - The internal combustion engine has an upstream side NO | 10-23-2014 |
20150033713 | DEVICE FOR SUPPLYING A LIQUID ADDITIVE AND MOTOR VEHICLE HAVING THE DEVICE - A device for supplying a liquid additive for a motor vehicle includes a tank for storing the liquid additive and a delivery unit for delivering the liquid additive out of the tank. A sensor emits and receives waves and is configured to measure a fill level of the liquid additive in the tank by way of a propagation time measurement of the waves along a measurement path to a liquid surface in the tank and back to the sensor. The measurement path runs at least partially through a measurement duct. At least one back-flushing line ends in the measurement duct so that flushing of the measurement duct to the tank can be performed, in such a way that the measurement duct is kept clean and/or is cleaned. A motor vehicle having the device is also provided. | 02-05-2015 |
20150113964 | SYSTEMS AND METHODS FOR CONTROL OF ENGINE NOX EMISSIONS USING LIQUID AND DRY REDUCTANT SOURCES - Reductant delivery systems are disclosed that include a dry reductant source and a liquid reductant source which are operable to selectively provide gaseous reductant and liquid reductant to an exhaust aftertreatment system for treatment and reduction of NOx emissions. The gaseous reductant is provided to the exhaust aftertreatment system for treatment of NOx emissions under a first temperature condition associated with the exhaust system and the liquid reductant for treatment of NOx emissions under a second temperature condition associated with the exhaust system. | 04-30-2015 |
20150128576 | EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification system includes a previous-stage oxidation catalyst device, an ammonia-based solution feeder, a Diesel Particulate Filter (DPF) device, a turbine of a turbocharger, and a NOx selective reduction catalyst device in the exhaust system of an internal combustion engine in this order from an exhaust port side. The NH | 05-14-2015 |
20160069235 | UREA COMMON RAIL - An exhaust after-treatment system includes an exhaust treatment component, a tank for holding an exhaust treatment fluid, and an exhaust treatment fluid dosing system. The dosing system includes a fluid distributor providing exhaust treatment fluid under pressure to a plurality of dosing modules that dose exhaust treatment fluid into the exhaust stream and a return for returning unused exhaust treatment fluid to the tank. A valve is positioned between the fluid distributor and the return and is configured to allow a flow of exhaust treatment fluid from the return to the fluid distributor before being returned to the tank during a purge operation. A controller is configured to open the valve and allow communication between the return and the fluid distributor during the purge operation such that unused exhaust treatment fluid drains during the purge operation. | 03-10-2016 |
20160076422 | NH3 Flow Measurement - A flow manifold system for injecting a first gas into a second gas, such as, for example, a system for injecting ammonia gas into the exhaust gas of an internal combustion engine. The first gas may be supplied to the system by one or more cartridges. The system may also include a control valve that is configured to control the delivery of the first gas to the least one critical flow orifice. The critical flow orifice is configured to allow for a relatively constant volumetric flow of the first gas through the critical flow orifice when the first gas attains a critical flow. Such critical flow may allow for an accurate estimation of the flow of the first gas through the critical orifice, and subsequently to the second gas, without the use of a flow sensor. | 03-17-2016 |
20180023441 | EXHAUST GAS CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE | 01-25-2018 |