US Patent No: 6,467,259

Number of patents in Portfolio can not be more than 2000

Method and system for operating dual-exhaust engine

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Abstract

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An exhaust gas treatment system for an internal combustion engine includes a pair of upstream emission control devices which respectively receive the exhaust gas generated by a respective group of cylinders, and a single, shared downstream emission control device receiving catalyzed exhaust gas from each of the upstream emission control devices. After the downstream device stores a selected constituent gas generated when each cylinder group is operating 'lean,' the downstream device is purged by operating the first cylinder group with a stoichiometric air-fuel mixture while operating the second cylinder group with a rich air-fuel mixture, such that the combined catalyzed exhaust gas flowing through the downstream device during the purge event has an air-fuel ratio slightly rich of stoichiometry. As a result, the invention improves overall vehicle fuel economy because only one of the upstream devices is purged of stored oxygen when purging the downstream device of previously-stored constituent gas.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FORD GLOBAL TECHNOLOGIES, INC.DEARBORN, MI3312

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Farmer, David George Plymouth, MI 32 485
Surnilla, Gopichandra West Bloomfield, MI 530 2139

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (48)
4,964,272 Air-fuel ratio feedback control system including at least downstreamside air-fuel ratio sensor 56 1988
5,088,281 Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensor system 79 1989
5,270,024 Process for reducing nitrogen oxides from exhaust gas 92 1990
5,331,809 Exhaust gas purification system for an internal combustion engine 90 1990
5,189,876 Exhaust gas purification system for an internal combustion engine 96 1991
5,233,830 Exhaust gas purification system for an internal combustion engine 94 1991
5,174,111 Exhaust gas purification system for an internal combustion engine 76 1991
5,165,230 Apparatus for determining deterioration of three-way catalyst of internal combustion engine 67 1991
5,201,802 Exhaust gas purification system for an internal combustion engine 127 1992
5,209,061 Exhaust gas purification system for an internal combustion engine 81 1992
5,412,946 NOx decreasing apparatus for an internal combustion engine 151 1992
5,473,887 Exhaust purification device of internal combustion engine 168 1993
5,402,641 Exhaust gas purification apparatus for an internal combustion engine 127 1993
5,433,074 Exhaust gas purification device for an engine 82 1993
5,412,945 Exhaust purification device of an internal combustion engine 87 1993
5,423,181 Exhaust gas purification device of an engine 69 1993
5,377,484 Device for detecting deterioration of a catalytic converter for an engine 85 1993
5,437,153 Exhaust purification device of internal combustion engine 129 1994
5,450,722 Exhaust purification device of internal combustion engine 68 1994
5,448,887 Exhaust gas purification device for an engine 80 1994
5,473,890 Exhaust purification device of internal combustion engine 108 1994
5,483,795 Exhaust purification device of internal combustion engine 100 1994
5,472,673 Exhaust gas purification device for an engine 103 1994
5,551,231 Engine exhaust gas purification device 97 1994
5,577,382 Exhaust purification device of internal combustion engine 89 1995
5,746,052 Exhaust gas purification device for an engine 86 1995
5,740,669 Exhaust gas purification device for an engine 91 1995
5,732,554 Exhaust gas purification device for an internal combustion engine 104 1996
5,715,679 Exhaust purification device of an engine 83 1996
5,735,119 Exhaust purification device of an engine 78 1996
5,713,199 Device for detecting deterioration of NO.sub.x absorbent 97 1996
5,743,086 Device for judging deterioration of catalyst of engine 27 1996
5,737,917 Device for judging deterioration of catalyst of engine 20 1996
5,974,793 Exhaust gas purification device for an internal combustion engine 105 1997
5,752,492 Apparatus for controlling the air-fuel ratio in an internal combustion engine 66 1997
5,996,338 Exhaust gas purifying device for engine 81 1997
5,934,072 Exhaust gas purifying device for engine 33 1998
5,974,791 Exhaust gas purification device for an internal combustion engine 192 1998
5,974,794 Exhaust gas purification device for an internal combustion engine 40 1998
5,865,027 Device for determining the abnormal degree of deterioration of a catalyst 60 1998
5,979,161 Device for determining the abnormal degree of deterioration of a catalyst 26 1998
6,058,700 Device for purifying exhaust gas of engine 102 1998
6,047,542 Method and device for purifying exhaust gas of engine 56 1998
6,014,859 Device for purifying exhaust gas of engine 114 1998
5,970,707 Exhaust gas purification device for an internal combustion engine 93 1998
6,138,453 Exhaust gas purification device for an internal combustion engine 46 1998
6,205,773 Exhaust gas purification device for an internal combustion engine 42 1999
6,250,074 Air-fuel ratio control apparatus and method of internal combustion engine 15 2000
 
FORD GLOBAL TECHNOLOGIES, INC. (20)
5,359,852 Air fuel ratio feedback control 41 1993
5,419,122 Detection of catalytic converter operability by light-off time determination 81 1993
5,414,994 Method and apparatus to limit a midbed temperature of a catalytic converter 125 1994
5,626,117 Electronic ignition system with modulated cylinder-to-cylinder timing 66 1994
5,452,576 Air/fuel control with on-board emission measurement 96 1994
5,626,014 Catalyst monitor based on a thermal power model 109 1995
5,598,703 Air/fuel control system for an internal combustion engine 62 1995
5,743,084 Method for monitoring the performance of a no.sub.x trap 101 1996
5,771,685 Method for monitoring the performance of a NO.sub.x trap 109 1996
5,722,236 Adaptive exhaust temperature estimation and control 100 1996
5,746,049 Method and apparatus for estimating and controlling no x trap temperature 82 1996
5,832,722 Method and apparatus for maintaining catalyst efficiency of a NO.sub.x trap 93 1997
5,778,666 Method and apparatus for improving engine fuel economy 101 1997
5,974,788 Method and apparatus for desulfating a no.sub.x trap 154 1997
5,983,627 Closed loop control for desulfating a NO.sub.x trap 90 1997
5,910,096 Temperature control system for emission device coupled to direct injection engines 50 1997
5,877,413 Sensor calibration for catalyst deterioration detection 29 1998
6,023,929 Engine with cylinder deactivation 156 1998
6,079,204 Torque control for direct injected engines using a supplemental torque apparatus 52 1998
6,199,373 Method and apparatus for desulfating a NOx trap 40 1999
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (10)
5,325,664 System for determining deterioration of catalysts of internal combustion engines 100 1992
5,544,482 Exhaust gas-purifying system for internal combustion engines 78 1995
5,803,048 System and method for controlling air-fuel ratio in internal combustion engine 64 1995
5,655,363 Air-fuel ratio control system for internal combustion engines 75 1995
5,724,808 Air-fuel ratio control system for internal combustion engines 80 1996
6,012,428 Method for controlling air-fuel ratio in internal combustion engine 67 1997
5,966,930 Catalyst deterioration-determining system for internal combustion engines 45 1997
6,003,308 Air-fuel ratio control system for internal combustion engines 30 1997
6,092,369 Catalyst deterioration-determining system for internal combustion engines using compressed natural gas 27 1998
6,128,899 Exhaust gas purification system for internal combustion engine 39 1999
 
NISSAN MOTOR CO., LTD. (8)
5,009,210 Air/fuel ratio feedback control system for lean combustion engine 66 1987
4,913,122 Air-fuel ratio control system 71 1988
5,729,971 Engine catalyst temperature estimating device and catalyst diagnostic device 36 1996
6,101,809 Exhaust gas purifying system of internal combustion engine 32 1998
6,148,611 Engine air-fuel ratio controller and control method 29 1999
6,237,330 Exhaust purification device for internal combustion engine 92 1999
6,145,305 System and method for diagnosing deterioration of NOx-occluded catalyst 25 1999
6,233,923 Exhaust emission control device of internal combustion engine 25 2000
 
HITACHI, LTD. (6)
5,693,877 Evaluating method for NO.sub.x eliminating catalyst, an evaluating apparatus therefor, and an efficiency controlling method therefor 76 1994
5,802,843 Method and apparatus for diagnosing engine exhaust gas purification system 72 1995
5,617,722 Exhaust control device of internal combustion engine 30 1995
5,867,983 Control system for internal combustion engine with enhancement of purification performance of catalytic converter 32 1996
5,813,387 Change gear control device using acceleration and gear ratio as parameters for automatic transmission in a motor vehicle and the method therefor 21 1996
5,979,404 Output torque control apparatus and method for an internal combustion engine 26 1997
 
ROBERT BOSCH GMBH (6)
5,267,439 Method and arrangement for checking the aging condition of a catalyzer 64 1991
5,335,538 Method and arrangement for determining the storage capacity of a catalytic converter 93 1992
6,119,449 Internal combustion engine and method of operating the same 28 1998
6,216,448 Method of diagnosing an NOX storage catalytic converter during operation of an internal combustion engine 42 1999
6,216,451 Method of diagnosing an NOx storage catalytic converter during operation of an internal combustion engine 32 1999
6,161,428 Method and apparatus for evaluating the conversion capability of a catalytic converter 27 1999
 
Nippondenso Co., Ltd. (5)
4,251,989 Air-fuel ratio control system 95 1979
4,677,955 Method and apparatus for discriminating operativeness/inoperativeness of an air-fuel ratio sensor 26 1985
5,097,700 Apparatus for judging catalyst of catalytic converter in internal combustion engine 76 1991
5,622,047 Method and apparatus for detecting saturation gas amount absorbed by catalytic converter 67 1994
5,806,306 Deterioration monitoring apparatus for an exhaust system of an internal combustion engine 20 1996
 
NGK INSULATORS, LTD. (4)
5,953,907 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means 53 1997
6,012,282 Method for controlling engine exhaust gas system 52 1997
6,026,640 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means 34 1999
6,134,883 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means 68 1999
 
CONTINENTAL AUTOMOTIVE GMBH (3)
5,862,661 Method for monitoring catalytic converter efficiency 27 1997
5,938,715 Method for monitoring the conversion capacity of a catalytic converter 78 1998
6,145,302 Method for monitoring a catalytic converter 47 1998
 
DENSO CORPORATION (3)
6,073,440 System for detecting deterioration of catalyst for purifying exhaust gas 41 1997
6,148,612 Engine exhaust gas control system having NOx catalyst 39 1998
6,244,046 Engine exhaust purification system and method having NOx occluding and reducing catalyst 48 1999
 
ENGELHARD CORPORATION (3)
5,531,972 Staged three-way conversion catalyst and method of using the same 30 1991
5,792,436 Method for using a regenerable catalyzed trap 88 1996
6,105,365 Apparatus, method, and system for concentrating adsorbable pollutants and abatement thereof 96 1997
 
NGK SPARK PLUG CO., LTD. (3)
4,884,066 Deterioration detector system for catalyst in use for emission gas purifier 77 1987
5,357,750 Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor 66 1993
6,214,207 Method and apparatus for measuring oxygen concentration and nitrogen oxide concentration 42 1997
 
CONTINENTAL AUTOMOTIVE SYSTEMS, INC. (2)
5,842,339 Method for monitoring the performance of a catalytic converter 47 1997
5,842,340 Method for controlling the level of oxygen stored by a catalyst within a catalytic converter 127 1997
 
MITSUBISHI JIDOSHA KOGYO K.K. (A.K.A. MITSUBISHI MOTORS CORPORATION) (2)
5,595,060 Apparatus and method for internal-combustion engine control 118 1995
5,657,625 Apparatus and method for internal combustion engine control 159 1995
 
VOLKSWAGEN AG (2)
6,164,064 Method and arrangement for desulfurization of NOx reservoir catalysts 30 1998
5,992,142 No exhaust emission control method and arrangement 82 1999
 
ANR PIPELINE COMPANY (1)
6,189,523 Method and system for controlling an air-to-fuel ratio in a non-stoichiometric power governed gaseous-fueled stationary internal combustion engine 37 1999
 
BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT (1)
4,533,900 Service-interval display for motor vehicles 82 1982
 
DAIMLER AG (1)
5,771,686 Method and apparatus for operating a diesel engine 106 1996
 
DAIMLER-BENZ AKTIENGESELLSCHAFT (1)
4,622,809 Method and apparatus for monitoring and adjusting .lambda.-probe-controlled catalytic exhaust gas emission control systems of internal combustion engines 114 1985
 
ENVIRONTEST SYSTEMS CORP. (1)
5,831,267 Method and apparatus for remote measurement of exhaust gas 66 1997
 
EPIQ SENSOR-NITE N.V. (1)
6,202,406 Method and apparatus for catalyst temperature control 42 1999
 
FREIGHTLINER LLC (1)
6,092,021 Fuel use efficiency system for a vehicle for assisting the driver to improve fuel economy 106 1997
 
GAS TECHNOLOGY INSTITUTE (1)
5,554,269 No.sub.x sensor using electrochemical reactions and differential pulse voltammetry (DPV) 32 1995
 
HITACHI AMERICA, LTD. (1)
5,426,934 Engine and emission monitoring and control system utilizing gas sensors 90 1993
 
HONDA MOTOR CO., LTD. (1)
6,161,378 Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine 50 1998
 
HYUNDAI MOTOR COMPANY (1)
5,929,320 Apparatus and method for judging deterioration of catalysts device and oxygen content sensing device 25 1996
 
ISUZU MOTORS LIMITED (1)
5,410,873 Apparatus for diminishing nitrogen oxides 94 1993
 
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO (1)
5,272,871 Method and apparatus for reducing nitrogen oxides from internal combustion engine 152 1992
 
Kohler Co. (1)
5,222,471 Emission control system for an internal combustion engine 65 1992
 
Nippon Shokubai Kagaku Kogyo Co., Ltd. (1)
4,854,123 Method for removal of nitrogen oxides from exhaust gas of diesel engine 104 1988
 
SUZUKI MOTOR CORPORATION (1)
5,448,886 Catalyst deterioration-determining device for an internal combustion engine 24 1993
 
TJB Engineering, Inc. (1)
6,102,019 Advanced intelligent fuel control system 21 1999
 
Other [Check patent profile for assignment information] (2)
4,186,296 Vehicle energy conservation indicating device and process for use 19 1977
5,569,848 System, method and apparatus for monitoring tire inflation pressure in a vehicle tire and wheel assembly 80 1995

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
FORD GLOBAL TECHNOLOGIES, LLC (33)
7,168,239 Method and system for rapid heating of an emission control device 11 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 21 2002
6,769,398 Idle speed control for lean burn engine with variable-displacement-like characteristic 35 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 51 2002
6,736,121 Method for air-fuel ratio sensor diagnosis 51 2002
6,725,830 Method for split ignition timing for idle speed control of an engine 8 2002
6,868,667 Method for rapid catalyst heating 10 2003
7,367,180 System and method for controlling valve timing of an engine with cylinder deactivation 2 2004
7,159,387 Emission control device 3 2004
7,086,386 Engine system and method accounting for engine misfire 16 2004
7,073,322 System for emission device control with cylinder deactivation 3 2004
7,073,494 System and method for estimating fuel vapor with cylinder deactivation 5 2004
7,069,718 Engine system and method for injector cut-out operation with improved exhaust heating 5 2004
7,044,885 Engine system and method for enabling cylinder deactivation 2 2004
7,028,670 Torque control for engine during cylinder activation or deactivation 11 2004
7,025,039 System and method for controlling valve timing of an engine with cylinder deactivation 7 2004
7,021,046 Engine system and method for efficient emission control device purging 5 2004
7,000,602 Engine system and fuel vapor purging system with cylinder deactivation 12 2004
6,978,204 Engine system and method with cylinder deactivation 21 2004
6,820,597 Engine system and dual fuel vapor purging system with cylinder deactivation 25 2004
6,874,490 Method and system of adaptive learning for engine exhaust gas sensors 14 2004
7,363,915 Method to control transitions between modes of operation of an engine 9 2004
6,955,155 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 7 2004
7,069,903 Idle speed control for lean burn engine with variable-displacement-like characteristic 10 2004
7,249,583 System for controlling valve timing of an engine with cylinder deactivation 21 2005
7,497,074 Emission control device 1 2006
7,797,929 Low temperature emission control 0 2007
7,647,766 System and method for controlling valve timing of an engine with cylinder deactivation 5 2007
7,941,994 Emission control device 2 2008
 
CUMMINS, INC. (5)
7,707,826 System for controlling triggering of adsorber regeneration 7 2006
7,654,076 System for controlling absorber regeneration 2 2006
7,654,079 Diesel oxidation catalyst filter heating system 3 2006
7,594,392 System for controlling adsorber regeneration 4 2006
7,721,535 Method for modifying trigger level for adsorber regeneration 0 2006
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
8,220,250 Internal combustion engine and method of controlling the same 0 2006
8,261,533 Exhaust purification apparatus of internal combustion engine 0 2007
 
DENSO CORPORATION (1)
6,804,953 Air-fuel ratio control system for multi-cylinder engine 2 2002
 
DETROIT DIESEL CORPORATION (1)
6,883,311 Compact dual leg NOx absorber catalyst device and system and method of using the same 17 2003
 
EISAI R&D MANAGEMENT CO., LTD. (1)
7,533,523 Optimized desulfation trigger control for an adsorber 4 2006
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
8,443,587 Method for exhaust aftertreatment in an internal combustion engine 0 2009

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