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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Van Nieuwstadt; Michiel J.
Address:
Ann Arbor, MI
No. of patents:
50
Patents:












Patent Number Title Of Patent Date Issued
8281578 Method for correcting an estimate of NH.sub.3 stored within a selective catalyst reduction syste October 9, 2012
A method for correcting an estimated amount of NH.sub.3 store within a SCR is described. In one example, SCR efficiency is determined from a NOx sensor output and the estimated amount of NH.sub.3 is corrected based on the SCR efficiency. Engine emissions may be reduced via improving the
8272215 Transient compressor surge response for a turbocharged engine September 25, 2012
A method for responding to an existing or incipient surge condition of a turbocharger coupled to an engine of a motor vehicle is provided. The method comprises receiving a signal responsive to an operating condition of the turbocharger and adjusting one or more operating parameters of th
8267065 Method for controlling low temperature combustion September 18, 2012
A method for adjusting fuel injection of an engine is disclosed. In one example, fuel injection timing is adjusted to account for fuels having different cetane numbers. Operation of the engine may be improved especially during conditions where combustion phase may vary.
8209961 Engine-off ammonia vapor management system and method July 3, 2012
A method of managing vapors generated from an ammonia-containing reductant delivery system for a vehicle is described. The method may include storing ammonia containing vapors generated in the reductant delivery system during engine-off and then purging said stored ammonia into an ex
8209110 Calibration scheme for an exhaust gas sensor June 26, 2012
Various systems and methods are described for controlling an engine in a vehicle in response to an equilibrium value of an exhaust gas constituent generated from an exhaust gas sensor. One example method comprises during engine fueling below a threshold amount where at least one intake v
8206204 Control unit heat management June 26, 2012
A method of cooling an engine control unit (ECU) coupled to an engine in a vehicle having a cabin climate control system, comprising operating the vehicle cabin climate control system according to a customer-based climate control setting during a first operating condition, and overri
8200414 Methods and systems for exhaust gas mixing June 12, 2012
A method of operating an engine system is described in which a back-pressure valve of a low pressure EGR system can be modulated at a lower frequency during an EGR operation, and at a higher frequency when additional exhaust gas sensing is requested. Back-pressure valve modulation ca
8151560 System and method for monitoring particulate filter performance April 10, 2012
In an apparatus having an internal combustion engine, an exhaust system for transporting engine exhaust from the engine is described. In one example, a particulate filter disposed in the exhaust system is assessed for degradation. The approach may be particularly useful for an image
8141346 System and method for monitoring reductant quality March 27, 2012
A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system, comprising of correlating a change in a monitored operating condition with a refill event to determine whether a reductant-diluting substance has been added
8136343 System for an engine having a particulate matter sensor March 20, 2012
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
8132404 Ammonia vapor storage and purge system and method March 13, 2012
A method is provided for managing vapor generation in a reductant storage and delivery system. In one example, urea vapors generated from liquid in a storage device are temporarily stored and later purged to the exhaust system of the engine.
8116961 Controlling of a vehicle responsive to reductant conditions February 14, 2012
Controlling a vehicle responsive to reductant conditions is provided. The method for controlling a vehicle having an engine with an exhaust, the exhaust having a reductant injection system including a reductant storage vessel, the engine further having a fuel system including a fuel stor
8051829 Method for controlling low temperature combustion November 8, 2011
A method for adjusting fuel injection of an engine is disclosed. In one example, fuel injection timing is adjusted to account for fuels having different cetane numbers. Operation of the engine may be improved especially during conditions where combustion phase may vary.
8051704 Method for diagnosing fuel injectors November 8, 2011
A fuel injector diagnostic is disclosed. In one example, the diagnostic can determine if that amount of fuel injected or the timing of start of injection is degraded. Thus, the fuel injector diagnostic method can distinguish between different types of injector degradation.
8051645 Determination of diesel particulate filter load under both transient and steady state drive cycl November 8, 2011
Methods for updating the PF soot load of an engine are provided herein. In one example, a soot storage estimate is based on processing operations that occur at different timings. The method can improve soot estimation during some conditions.
8036814 Calibration scheme for an exhaust gas sensor October 11, 2011
Various systems and methods are described for controlling an engine in a vehicle in response to an equilibrium value of an exhaust gas constituent generated from an exhaust gas sensor. One example method comprises during engine fueling below a threshold amount where at least one intake v
8015801 Management of a plurality of reductants for selective catalytic reduction September 13, 2011
A method of operating a reductant delivery and storage system of a vehicle, comprising of storing an ammonia-containing fluid in a first storage device, generating ammonia vapors in the first storage device, storing said generated ammonia vapors in a second storage device, purging sa
7992388 Method for estimating compressor output temperature for a two-stage turbocharger August 9, 2011
A method for estimating the output temperature of the output compressor of a two-stage turbocharger. The method includes: storing a composite relationship relating temperature ratio across a pair of compressors of the two-stage turbocharger as a function of mass flow through such pair
7971426 Reductant injection system diagnostics July 5, 2011
A method is described for controlling operation of a reductant injection system. In one example, a pump of the reductant injection system is operated at a pressure to inject reductant into an exhaust system based on voltage supplied to the pump. The method can allow operation of the
7945377 Methods and systems for exhaust gas mixing May 17, 2011
A method of operating an engine system is described in which a back-pressure valve of a low pressure EGR system can be modulated at a lower frequency during an EGR operation, and at a higher frequency when additional exhaust gas sensing is requested. Back-pressure valve modulation ca
7770384 Ammonia vapor storage and purge system and method August 10, 2010
A method of operating a reductant delivery and storage system of a vehicle, comprising of storing an ammonia-containing fluid in a first storage device, generating ammonia vapors in the first storage device and storing said generated ammonia vapors in a second storage device, purging
7726118 Engine-off ammonia vapor management system and method June 1, 2010
A method of managing vapors generated from an ammonia-containing reductant delivery system for an engine of a vehicle, comprising of during at least a portion of engine-off conditions, storing ammonia containing vapors generated in the reductant delivery system, and after said storing an
7526950 Emission control diagnostic system and method May 5, 2009
A method of diagnosing an emission control system of an internal combustion engine, comprising during degraded performance of the emission control system, dynamically identifying a relationship between a plurality of operating conditions of the emission control system; and correlatin
7493762 System and method for diagnostic of low pressure exhaust gas recirculation system and adapting o February 24, 2009
A system for a diesel engine having an intake manifold and an exhaust manifold comprises a turbocharger between the intake and exhaust manifolds of the engine, a low pressure exhaust gas recirculation system, and a high pressure exhaust gas recirculation system. Further, the system i
7469533 Brake torque load generation process for diesel particulate filter regeneration and SOx removal December 30, 2008
A method of regeneration of an emission control device in a diesel engine of a vehicle having a wheel brake comprises receiving a generation request by an operator of the vehicle; activating the wheel brake; increasing engine torque; and regenerating the emission control device.
7380400 System and method for high pressure and low pressure exhaust gas recirculation control and estim June 3, 2008
A system for a diesel engine having an intake manifold and an exhaust manifold is described. The system may include both a high pressure and low pressure exhaust gas recirculation system, as well as a turbocharger. Further, in one example, the system may include two mass airflow sensors
7367188 System and method for diagnostic of low pressure exhaust gas recirculation system and adapting o May 6, 2008
A system for a diesel engine having an intake manifold and an exhaust manifold, comprises a turbocharger between the intake and exhaust manifolds; a low pressure exhaust gas recirculation system having a first valve coupled thereto for regulating flow; a high pressure exhaust gas rec
7278304 System and method for performing a particulate sensor diagnostic October 9, 2007
An apparatus comprising an internal combustion engine, an exhaust system in communication with the engine, a particulate sensor associated with the exhaust system, and a controller in electrical communication with the particulate sensor, wherein the controller is configured to determine
7240660 Heat management for control unit July 10, 2007
A method of reducing heat generated in a fuel injector driver controlled by an engine control unit (ECU) of a vehicle engine, the injector coupled to the engine, the method comprising of varying a number of fuel injector injections in an engine cycle as a temperature of the ECU varies, w
7137246 Control for diesel engine with particulate filter November 21, 2006
A system and method are described for operating a diesel engine and particulate filter during self-sustained filter regeneration. In particular, a method is described for preventing over-temperature during filter regeneration by limiting excess oxygen supplied to the particulate filt
7093427 Exhaust gas aftertreatment systems August 22, 2006
A method is presented for estimating an amount of ammonia stored in a urea-based SCR catalyst based on a dynamic model of the catalyst. The model takes into account chemical and physical properties of the catalyst, such as catalyst volume, the number of available ammonia storage cite
7031827 Computer algorithm to estimate particulate filter regeneration rates April 18, 2006
A system and method is described for determining degradation of a diesel particulate filter in an engine exhaust system. The method uses information indicative of a regeneration rate, such as regeneration duration. From this, it is possible to determine when particulate filter operat
7000383 Diesel aftertreatment systems February 21, 2006
A method and a system for improved reductant delivery to an exhaust gas aftertreatment device for a lean burn internal combustion engine exhaust are presented. The system includes a heated evaporator unit into which a mixture of reductant and air in injected, wherein the mixture is v
6993900 Exhaust gas aftertreatment systems February 7, 2006
A method is presented for estimating an amount of ammonia stored in a urea-based SCR catalyst based on a dynamic model of the catalyst. The model takes into account chemical and physical properties of the catalyst, such as catalyst volume, the number of available ammonia storage cite
6983589 Diesel aftertreatment systems January 10, 2006
A method for accurately diagnosing deterioration in an emission control system for a lean burn internal combustion engine is presented. The emission control system includes an Active Lean NOx (ALNC) Catalyst and a system for injecting a hydrocarbon-based reductant into the ALNC thereby
6981368 Exhaust gas aftertreatment systems January 3, 2006
A method is presented for estimating an amount of ammonia stored in a urea-based SCR catalyst based on a dynamic model of the catalyst. The model takes into account chemical and physical properties of the catalyst, such as catalyst volume, the number of available ammonia storage cite
6968680 Diesel engine system for use with emission control device November 29, 2005
An exhaust valve downstream of a diesel engine splits exhaust gasses between two catalysts. In one position, most of the exhaust gasses go to a first catalyst, and the remaining exhaust gasses, along with injected reductant go to a second catalyst. In a second position, most of the e
6947831 Pressure sensor diagnosis via a computer September 20, 2005
A method is described for controlling regeneration of a particulate filter based on at least a sensor, such as a differential pressure sensor. Degradation of the sensor is then detected in a variety of ways. One approach takes advantage of the slowly varying flow resistance of the fi
6895747 Diesel aftertreatment systems May 24, 2005
A method and a system for improving conversion efficiency of a urea-based SCR catalyst coupled downstream of a diesel or other lean burn engine is presented. The system includes an electrically heated vaporizer unit into which a mixture of reductant and air in injected. The mixture is va
6892530 Exhaust gas aftertreatment systems May 17, 2005
A method for improving NOx conversion efficiency of a urea base SCR catalyst is presented. Since efficiency is reduced by the presence of hydrocarbons in the catalyst, the method proposes to regenerate the SCR by maintaining its temperature above the boiling point of hydrocarbons for a
6862879 Diesel aftertreatment system March 8, 2005
A method for improving NOx conversion efficiency of a lean exhaust gas aftertreatment device by determining an accurate amount of reductant required is presented. The method includes calculating a base reductant injection amount based on a steady state amount of NOx in the engine fee
6834498 Diesel aftertreatment systems December 28, 2004
A method and a system for improved reductant delivery to an exhaust gas aftertreatment device for a lean burn internal combustion engine exhaust are presented. The system includes a heated evaporator unit into which a mixture of reductant and air in injected, wherein the mixture is vapor
6732723 Method and system for controlling EGR rate in diesel engines May 11, 2004
A method and system for controlling EGR rats of an internal combustion engine includes measuring a mass airflow passing to the intake throttle and a desired mass airflow. An error signal is produced representative of a difference between the measured mass airflow and the desired mess
6487852 Method and apparatus for controlling reactant injection into an active lean NOx catalyst December 3, 2002
A method and system for determining whether a desired amount of hydrocarbon is actually injected into an engine exhaust to react with NOx in such engine exhaust. The reaction is facilitated with a catalyst downstream of the hydrocarbon injection. The method and system measure a first
6209520 Method and apparatus for cylinder balancing April 3, 2001
An automobile cylinder balancing assembly 10 including a controller 36 which operates under stored program control and which substantially ensures that the torque produced by each of the cylinders 12, 14 is substantially equal, thereby causing the cylinders 12, 14 to be selectively b
6178749 Method of reducing turbo lag in diesel engines having exhaust gas recirculation January 30, 2001
A method of reducing turbo lag in a compression ignition engine having an exhaust gas recirculation system (EGR) and a variable geometry turbocharger (VGT). The method includes the steps of determining an intake manifold pressure and intake manifold mass airflow setpoint, MAP.sub.d and
6128902 Control method and apparatus for turbocharged diesel engines having exhaust gas recirculation October 10, 2000
A method and apparatus of controlling the airflow into a compression ignition engine having an exhaust gas recirculation (EGR) system and a variable geometry turbocharger (VGT). The control strategy includes the steps of measuring the intake manifold pressure and exhaust manifold pre
6095127 Fuel limiting method in diesel engines having exhaust gas recirculation August 1, 2000
A method of controlling the fueling rate of a compression ignition engine having an exhaust gas recirculation system (EGR) and a turbocharger. The method includes the steps of predicting the exhaust gas air/fuel ratio as a function engine operating characteristics and the operator-reques
6067800 Control method for a variable geometry turbocharger in a diesel engine having exhaust gas recirc May 30, 2000
A method of estimating the actuator position of a variable geometry turbocharger (VGT) of a compression ignition engine having an exhaust gas recirculation (EGR) system. The method includes the steps of determining the exhaust manifold temperature (T.sub.2), determining the mass flow rat
6035639 Method of estimating mass airflow in turbocharged engines having exhaust gas recirculation March 14, 2000
A method of estimating the airflow into a compression ignition engine having an exhaust gas recirculation system (EGR) and a variable geometry turbocharger (VGT). The method includes the steps of generating an EGR flow value as a function of the intake manifold pressure (MAP), exhaust










 
 
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