US Patent No: 5,974,788

Number of patents in Portfolio can not be more than 2000

Method and apparatus for desulfating a no.sub.x trap

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Abstract

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A method and apparatus for desulfating a NO.sub.x trap is proposed wherein the SO.sub.x purge temperature is achieved by modulating the amplitude of the A/F of the mixture supplied to the engine thereby storing oxygen in the trap during lean engine cylinder events and generating the required exotherm during rich engine cylinder events.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FORD GLOBAL TECHNOLOGIES, INC.DEARBORN, MI3305

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asik, Joseph R Bloomfield Hills, MI 12 443
Hepburn, Jeffrey S Dearborn, MI 7 384
Meyer, Garth M Dearborn, MI 8 318

Cited Art Landscape

Patent Info (Count) # Cites Year
 
FORD GLOBAL TECHNOLOGIES, INC. (4)
5,771,685 Method for monitoring the performance of a NO.sub.x trap 109 1996
5,746,049 Method and apparatus for estimating and controlling no x trap temperature 82 1996
5,758,493 Method and apparatus for desulfating a NO.sub.x trap 92 1996
5,832,722 Method and apparatus for maintaining catalyst efficiency of a NO.sub.x trap 93 1997

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
FORD GLOBAL TECHNOLOGIES, LLC (41)
6,843,051 Method and apparatus for controlling lean-burn engine to purge trap of stored NOx 1 2000
6,810,659 Method for determining emission control system operability 2 2000
6,708,483 Method and apparatus for controlling lean-burn engine based upon predicted performance impact 3 2000
6,629,453 Method and apparatus for measuring the performance of an emissions control device 4 2000
6,594,989 Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine 32 2000
6,691,507 Closed-loop temperature control for an emission control device 13 2000
6,860,100 Degradation detection method for an engine having a NOx sensor 4 2001
6,694,244 Method for quantifying oxygen stored in a vehicle emission control device 9 2001
6,691,020 Method and system for optimizing purge of exhaust gas constituent stored in an emission control device 2 2001
6,650,991 Closed-loop method and system for purging a vehicle emission control 2 2001
6,615,577 Method and system for controlling a regeneration cycle of an emission control device 20 2001
6,604,504 Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine 6 2001
6,553,754 Method and system for controlling an emission control device based on depletion of device storage capacity 16 2001
6,990,799 Method of determining emission control system operability 7 2001
6,553,757 NOx purge air/fuel ratio selection 7 2001
7,168,239 Method and system for rapid heating of an emission control device 10 2002
7,111,450 Method for controlling the temperature of an emission control device 13 2002
7,032,572 Method for controlling an engine to obtain rapid catalyst heating 6 2002
6,925,982 Overall scheduling of a lean burn engine system 1 2002
6,868,827 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 20 2002
6,769,398 Idle speed control for lean burn engine with variable-displacement-like characteristic 34 2002
6,758,185 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 25 2002
6,745,747 Method for air-fuel ratio control of a lean burn engine 20 2002
6,735,938 Method to control transitions between modes of operation of an engine 49 2002
6,736,120 Method and system of adaptive learning for engine exhaust gas sensors 13 2002
6,736,121 Method for air-fuel ratio sensor diagnosis 49 2002
6,725,830 Method for split ignition timing for idle speed control of an engine 8 2002
6,715,462 Method to control fuel vapor purging 22 2002
6,568,177 Method for rapid catalyst heating 84 2002
7,146,799 Computer controlled engine air-fuel ratio adjustment 2 2003
7,003,944 Computing device to generate even heating in exhaust system 5 2003
6,854,264 Computer controlled engine adjustment based on an exhaust flow 2 2003
6,766,641 Temperature control via computing device 37 2003
7,263,433 Computer device to calculate emission control device functionality 4 2003
7,181,905 Lean-burn engine exhaust air-fuel and temperature management strategy for improved catalyst durability 4 2003
6,874,490 Method and system of adaptive learning for engine exhaust gas sensors 14 2004
6,955,155 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 7 2004
7,059,112 Degradation detection method for an engine having a NOx sensor 12 2004
7,047,932 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 3 2004
7,069,903 Idle speed control for lean burn engine with variable-displacement-like characteristic 10 2004
7,325,394 System and method for desulfating a NOx trap 0 2006
 
FORD GLOBAL TECHNOLOGIES, INC. (28)
6,244,043 Emission control device air/fuel ratio control system 11 1999
6,199,373 Method and apparatus for desulfating a NOx trap 40 1999
6,267,937 Heating of a storage trap 1 1999
6,539,704 Method for improved vehicle performance 4 2000
6,499,293 Method and system for reducing NOx tailpipe emissions of a lean-burn internal combustion engine 9 2000
6,487,849 Method and apparatus for controlling lean-burn engine based upon predicted performance impact and trap efficiency 13 2000
6,487,850 Method for improved engine control 9 2000
6,481,199 Control for improved vehicle performance 10 2000
6,477,832 Method for improved performance of a vehicle having an internal combustion engine 13 2000
6,438,944 Method and apparatus for optimizing purge fuel for purging emissions control device 9 2000
6,434,930 Method and apparatus for controlling lean operation of an internal combustion engine 2 2000
6,427,437 Method for improved performance of an engine emission control system 6 2000
6,374,597 Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent 13 2000
6,360,529 Method and apparatus for enabling lean engine operation upon engine start-up 4 2000
6,360,530 Method and apparatus for measuring lean-burn engine emissions 7 2000
6,327,847 Method for improved performance of a vehicle 13 2000
6,308,515 Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent 15 2000
6,308,697 Method for improved air-fuel ratio control in engines 10 2000
6,418,711 Method and apparatus for estimating lean NOx trap capacity 7 2000
6,546,718 Method and system for reducing vehicle emissions using a sensor downstream of an emission control device 5 2001
6,539,706 Method and system for preconditioning an emission control device for operation about stoichiometry 1 2001
6,502,387 Method and system for controlling storage and release of exhaust gas constituents in an emission control device 11 2001
6,490,860 Open-loop method and system for controlling the storage and release cycles of an emission control device 7 2001
6,487,853 Method and system for reducing lean-burn vehicle emissions using a downstream reductant sensor 7 2001
6,467,259 Method and system for operating dual-exhaust engine 44 2001
6,463,733 Method and system for optimizing open-loop fill and purge times for an emission control device 35 2001
6,453,666 Method and system for reducing vehicle tailpipe emissions when operating lean 3 2001
6,490,856 Control for improved vehicle performance 8 2002
 
HONEYWELL INTERNATIONAL INC. (21)
7,743,606 Exhaust catalyst system 6 2004
7,182,075 EGR system 10 2004
7,467,614 Pedal position and/or pedal change rate for use in control of an engine 10 2004
7,328,577 Multivariable control for an engine 19 2004
7,165,399 Method and system for using a measure of fueling rate in the air side control of an engine 18 2004
7,752,840 Engine exhaust heat exchanger 7 2005
7,275,374 Coordinated multivariable control of fuel and air in engines 15 2005
7,469,177 Distributed control architecture for powertrains 10 2005
7,389,773 Emissions sensors for fuel control in engines 13 2005
7,155,334 Use of sensors in a state observer for a diesel engine 41 2005
7,357,125 Exhaust gas recirculation system 9 2005
7,415,389 Calibration of engine control systems 12 2005
7,591,135 Method and system for using a measure of fueling rate in the air side control of an engine 9 2006
7,878,178 Emissions sensors for fuel control in engines 6 2008
8,620,461 Method and system for updating tuning parameters of a controller 0 2009
8,504,175 Using model predictive control to optimize variable trajectories and system control 1 2010
8,165,786 System for particulate matter sensor signal processing 0 2010
8,109,255 Engine controller 4 2010
RE44452 Pedal position and/or pedal change rate for use in control of an engine 0 2010
8,265,854 Configurable automotive controller 2 2011
8,360,040 Engine controller 3 2012
 
SOUTHWEST RESEARCH INSTITUTE (9)
7,140,874 Method and apparatus for testing catalytic converter durability 9 2002
6,983,645 Method for accelerated aging of catalytic converters incorporating engine cold start simulation 3 2003
7,175,422 Method for accelerated aging of catalytic converters incorporating injection of volatilized lubricant 1 2003
7,299,137 Method for drive cycle simulation using non-engine based test system 3 2004
7,412,335 Component evaluations using non-engine based test system 3 2004
7,212,926 Testing using a non-engine based test system and exhaust product comprising alternative fuel exhaust 1 2004
7,347,086 System and method for burner-based accelerated aging of emissions control device, with engine cycle having cold start and warm up modes 2 2006
7,625,201 Method and apparatus for testing catalytic converter durability 2 2006
7,741,127 Method for producing diesel exhaust with particulate material for testing diesel engine aftertreatment devices 2 2007
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (7)
6,233,925 Exhaust discharge control device for internal combustion engine 37 1999
6,499,294 Exhaust gas purification device for an internal combustion engine 31 1999
7,073,325 Exhaust emission control method and system 2 2003
7,111,456 Exhaust emission control apparatus for internal combustion engine 4 2003
7,047,727 Rapid catalyst warm-up control device for internal combustion engine 1 2004
7,059,120 Device for controlling internal combustion engine 7 2004
7,305,820 Exhaust gas control apparatus for internal combustion engine 2 2004
 
HITACHI, LTD. (4)
6,755,015 Apparatus for purifying and controlling exhaust gases 4 2000
6,957,529 Emission control device for cylinder fuel injection engine 1 2001
6,865,880 Emission control device for cylinder fuel injection engine 5 2002
6,675,574 Control unit for internal combustion engine 1 2002
 
MITSUBISHI JIDOSHA KOGYO K.K. (A.K.A. MITSUBISHI MOTORS CORPORATION) (4)
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6,751,948 Direct injection internal combustion engine and controlling method therefor 10 2001
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NISSAN MOTOR CO., LTD. (4)
6,679,050 Exhaust emission control device for internal combustion engine 35 2000
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6,477,833 Engine exhaust emission control 10 2001
7,036,304 Exhaust gas purifying apparatus and method for internal combustion engine 7 2003
 
CONTINENTAL AUTOMOTIVE GMBH (3)
7,500,354 Method for operating an internal combustion engine that is equipped with a three-way catalytic converter 2 2003
7,962,277 Method and device for operating an internal combustion engine 2 2007
8,082,731 Method and device for operating an internal combustion engine 0 2008
 
CUMMINS, INC. (3)
7,654,076 System for controlling absorber regeneration 2 2006
8,240,129 System and method for diagnosing operation of a NOx adsorber catalyst 0 2006
8,061,124 Dynamic rich time capability for aftertreatment systems 0 2007
 
DAIMLER AG (3)
6,843,052 Exhaust emission control system having a nitrogen oxide adsorber and method for desulfating the nitrogen oxide adsorber 7 2000
6,637,189 Method for the periodically desulfating a nitrogen oxide or sulfur oxide accumulator of an exhaust gas cleaning system 16 2001
6,574,955 Method and apparatus for desulfurizing a nitrogen oxide adsorber 7 2001
 
DELPHI TECHNOLOGIES, INC. (3)
6,803,236 Diagnostic system for monitoring catalyst performance 8 2001
7,111,451 NO.sub.x adsorber diagnostics and automotive exhaust control system utilizing the same 6 2004
6,933,151 Diagnostic system for monitoring catalyst performance 2 2004
 
DENSO CORPORATION (3)
6,244,046 Engine exhaust purification system and method having NOx occluding and reducing catalyst 47 1999
6,311,482 Air-fuel ratio control apparatus for internal combustion engines 14 2000
6,263,668 Engine exhaust gas control system having NOx catalyst 5 2000
 
INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC (3)
7,669,408 LNT desulfation strategy with reformer temperature management 4 2005
7,412,823 LNT desulfation strategy 5 2006
8,356,474 LNT desulfation strategy with reformer temperature management 1 2010
 
ROBERT BOSCH GMBH (3)
6,898,928 Co-ordination of different requirements of the exhaust gas temperature and corresponding heating and cooling measures 5 2001
7,181,907 Method and system for regenerating, particularly desulfating, a storage-type catalytic converter during the purification of exhaust gases 1 2002
6,862,880 Method for operating a catalyst 3 2003
 
UMICORE AG & CO. KG (3)
6,145,303 Process for operating an exhaust gas treatment unit containing a sulfur trap and a nitrogen oxides storage catalyst 22 1999
6,601,381 Process for operating an exhaust gas treatment device for a gasoline engine 2 2001
6,973,775 Method for desulfating a nitrogen oxide storage catalyst 5 2003
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (2)
6,293,092 NOx adsorber system regeneration fuel control 9 1999
6,422,003 NOX catalyst exhaust feedstream control system 11 2000
 
MAZDA MOTOR CORPORATION (2)
6,269,634 Engine control device 22 2000
6,672,052 Exhaust gas purifying apparatus for internal combustion engine 11 2002
 
VOLKSWAGEN AG (2)
6,941,748 Method for desulfurization of an NOx storage accumulator-catalyst arranged in an exhaust system of an internal combustion engine 12 2000
6,530,216 Method for desulfating an NOx accumulator catalytic converter 11 2000
 
CATERPILLAR INC. (1)
7,434,386 System for monitoring exhaust gas concentrations 0 2004
 
DAIMLERCHRYSLER AG (1)
6,408,620 Exhaust-gas cleaning system with nitrogen oxide accumulator catalyst and sulphur oxide trap and operating method therefor 12 2000
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
6,327,849 Exhaust gas purifying apparatus for internal combustion engine and controller for internal combustion engine 8 2000
 
ISUZU MOTORS LIMITED (1)
7,114,328 Control method of exhaust gas purifying system 2 2003
 
JOHNSON MATTHEY PUBLIC LIMITED COMPANY (1)
6,978,601 Regenerating sulphur poisoned diesel catalysts 3 2000
 
REGENTS OF THE UNIVERSITY OF MINNESOTA (1)
7,765,792 System for particulate matter sensor signal processing 12 2005

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