Exhaust purification device of internal combustion engine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5450722
SERIAL NO

08196144

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A NO.sub.x absorbent (17) is disposed in an exhaust passage of an internal combustion engine. This NO.sub.x absorbent (17) absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (17) is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (17) becomes rich. When making the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (17) rich to release the NO.sub.x from the NO.sub.x absorbent (17), the degree of richness is made larger and the time the ratio is made rich is made shorter the higher the temperature of the NO.sub.x absorbent (17).

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOYOTA JIDOSHA KABUSHIKI KAISHAAICHI-KEN15124

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iguchi, Satoshi Mishima, JP 63 2134
Katoh, Kenji Sunto, JP 56 1908
Kihara, Tetsuro Susono, JP 12 950
Takeshima, Shinichi Susono, JP 81 2362
Tanaka, Toshiaki Numazu, JP 306 5171

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Mitsubishi Jukogyo Kabushiki Kaisha (1)
* 5343702 Zeolite converter for diesel engine 24 1991
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
* 5211010 Exhaust gas purification system for a diesel engine 24 1991
* 5209061 Exhaust gas purification system for an internal combustion engine 81 1992
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
DENSO CORPORATION (2)
* 6148612 Engine exhaust gas control system having NOx catalyst 39 1998
6244046 Engine exhaust purification system and method having NOx occluding and reducing catalyst 50 1999
 
SOUTHWEST RESEARCH INSTITUTE (1)
6679224 Method and apparatus for operating a diesel engine under stoichiometric or slightly fuel-rich conditions 18 2001
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
* 6519932 Exhaust gas purification apparatus and method for an internal combustion engine 4 1999
* 6763657 Exhaust gas purifying method of internal combustion engine 13 2002
 
FORD GLOBAL TECHNOLOGIES, LLC (37)
6843051 Method and apparatus for controlling lean-burn engine to purge trap of stored NOx 2 2000
6810659 Method for determining emission control system operability 3 2000
6708483 Method and apparatus for controlling lean-burn engine based upon predicted performance impact 3 2000
6629453 Method and apparatus for measuring the performance of an emissions control device 8 2000
6594989 Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine 32 2000
6691507 Closed-loop temperature control for an emission control device 18 2000
6860100 Degradation detection method for an engine having a NOx sensor 6 2001
6694244 Method for quantifying oxygen stored in a vehicle emission control device 15 2001
6691020 Method and system for optimizing purge of exhaust gas constituent stored in an emission control device 2 2001
6650991 Closed-loop method and system for purging a vehicle emission control 2 2001
6615577 Method and system for controlling a regeneration cycle of an emission control device 20 2001
6604504 Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine 7 2001
6553754 Method and system for controlling an emission control device based on depletion of device storage capacity 19 2001
6990799 Method of determining emission control system operability 7 2001
* 2002/0007,628 Method for determining emission control system operability 0 2001
6553757 NOx purge air/fuel ratio selection 9 2001
* 6574953 NOx purge air/fuel ratio selection 2 2001
7168239 Method and system for rapid heating of an emission control device 14 2002
7111450 Method for controlling the temperature of an emission control device 17 2002
7032572 Method for controlling an engine to obtain rapid catalyst heating 12 2002
6925982 Overall scheduling of a lean burn engine system 1 2002
6868827 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 21 2002
6769398 Idle speed control for lean burn engine with variable-displacement-like characteristic 43 2002
6758185 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 26 2002
6745747 Method for air-fuel ratio control of a lean burn engine 24 2002
6735938 Method to control transitions between modes of operation of an engine 61 2002
6736120 Method and system of adaptive learning for engine exhaust gas sensors 18 2002
6736121 Method for air-fuel ratio sensor diagnosis 51 2002
6725830 Method for split ignition timing for idle speed control of an engine 10 2002
6715462 Method to control fuel vapor purging 22 2002
6568177 Method for rapid catalyst heating 88 2002
6874490 Method and system of adaptive learning for engine exhaust gas sensors 17 2004
6955155 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 8 2004
7059112 Degradation detection method for an engine having a NOx sensor 15 2004
7047932 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 4 2004
7069903 Idle speed control for lean burn engine with variable-displacement-like characteristic 13 2004
* 2004/0244,770 Idle speed control for lean burn engine with variable-displacement-like characteristic 1 2004
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
* 5848529 Apparatus and method for purifying exhaust gas in an internal combustion engine 54 1997
* 2011/0088,377 EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE 1 2009
 
FORD GLOBAL TECHNOLOGIES, INC. (27)
* 5894725 Method and apparatus for maintaining catalyst efficiency of a NO.sub.x trap 59 1997
* 5832722 Method and apparatus for maintaining catalyst efficiency of a NO.sub.x trap 94 1997
6539704 Method for improved vehicle performance 4 2000
6499293 Method and system for reducing NOx tailpipe emissions of a lean-burn internal combustion engine 10 2000
6487849 Method and apparatus for controlling lean-burn engine based upon predicted performance impact and trap efficiency 15 2000
6487850 Method for improved engine control 11 2000
6481199 Control for improved vehicle performance 10 2000
6477832 Method for improved performance of a vehicle having an internal combustion engine 13 2000
6438944 Method and apparatus for optimizing purge fuel for purging emissions control device 11 2000
6434930 Method and apparatus for controlling lean operation of an internal combustion engine 3 2000
6427437 Method for improved performance of an engine emission control system 8 2000
6374597 Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent 13 2000
6360530 Method and apparatus for measuring lean-burn engine emissions 7 2000
6327847 Method for improved performance of a vehicle 13 2000
6308515 Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent 15 2000
6308697 Method for improved air-fuel ratio control in engines 12 2000
6370868 Method and system for purge cycle management of a lean NOx trap 20 2000
6389803 Emission control for improved vehicle performance 14 2000
6546718 Method and system for reducing vehicle emissions using a sensor downstream of an emission control device 5 2001
6502387 Method and system for controlling storage and release of exhaust gas constituents in an emission control device 11 2001
6490860 Open-loop method and system for controlling the storage and release cycles of an emission control device 7 2001
6487853 Method and system for reducing lean-burn vehicle emissions using a downstream reductant sensor 7 2001
6467259 Method and system for operating dual-exhaust engine 44 2001
6463733 Method and system for optimizing open-loop fill and purge times for an emission control device 38 2001
6453666 Method and system for reducing vehicle tailpipe emissions when operating lean 3 2001
6490856 Control for improved vehicle performance 9 2002
* 2004/0206,072 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 20 2004
 
HITACHI, LTD. (1)
* 6755015 Apparatus for purifying and controlling exhaust gases 5 2000
* Cited By Examiner