US Patent No: 5,715,679

Number of patents in Portfolio can not be more than 2000

Exhaust purification device of an engine

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

An exhaust purification device of an engine providing a NO.sub.x absorbent arranged in the exhaust passage. An O.sub.2 sensor generating a current proportional to the air-fuel ratio is arranged in the engine exhaust passage downstream of the NO.sub.x absorbent. The amount of NO.sub.x actually absorbed in the NO.sub.x absorbent at the time of release of the NO.sub.x is calculated on the basis of the output signal of this O.sub.2 sensor. On the basis of this calculated amount of NO.sub.x, correction is made so that the estimated amount of NO.sub.x represents the actual amount of absorption of NO.sub.x. When this corrected estimated amount of NO.sub.x reaches a set value, the action of releasing the NO.sub.x from the NO.sub.x absorbent is carried out.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOYOTA JIDOSHA KABUSHIKI KAISHAAICHI-KEN12954

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asanuma, Takamitsu - 125 1106
Iguchi, Satoshi Mishima, JP 69 1880
Katoh, Kenji - 66 1717
Kihara, Tetsuro Susono, JP 12 915
Takeshima, Shinichi Mishima, JP 97 2090
Tanaka, Toshiaki Kitakyusyu, JP 297 3871

Cited Art

Patent Info (Count) # Cites Year
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (4)
5,473,887 Exhaust purification device of internal combustion engine 154 1993
5,437,153 Exhaust purification device of internal combustion engine 129 1994
5,483,795 Exhaust purification device of internal combustion engine 99 1994
5,577,382 Exhaust purification device of internal combustion engine 89 1995

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
FORD GLOBAL TECHNOLOGIES, LLC (33)
6,843,051 Method and apparatus for controlling lean-burn engine to purge trap of stored NOx 0 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 3 2000
6,594,989 Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine 30 2000
6,691,507 Closed-loop temperature control for an emission control device 10 2000
6,860,100 Degradation detection method for an engine having a NOx sensor 2 2001
6,694,244 Method for quantifying oxygen stored in a vehicle emission control device 5 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 13 2001
6,990,799 Method of determining emission control system operability 7 2001
7,168,239 Method and system for rapid heating of an emission control device 8 2002
7,111,450 Method for controlling the temperature of an emission control device 11 2002
7,032,572 Method for controlling an engine to obtain rapid catalyst heating 5 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 26 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 19 2002
6,735,938 Method to control transitions between modes of operation of an engine 44 2002
6,736,120 Method and system of adaptive learning for engine exhaust gas sensors 10 2002
6,736,121 Method for air-fuel ratio sensor diagnosis 48 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
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 6 2004
7,059,112 Degradation detection method for an engine having a NOx sensor 10 2004
7,047,932 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 2 2004
7,069,903 Idle speed control for lean burn engine with variable-displacement-like characteristic 8 2004
 
FORD GLOBAL TECHNOLOGIES, INC. (27)
5,832,722 Method and apparatus for maintaining catalyst efficiency of a NO.sub.x trap 93 1997
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
6,370,868 Method and system for purge cycle management of a lean NOx trap 20 2000
6,389,803 Emission control for improved vehicle performance 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 31 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
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (4)
6,336,320 Exhaust gas purification device for an internal combustion engine 42 1999
6,289,672 Exhaust gas purification device for an internal combustion engine 29 1999
6,698,188 Emission control apparatus of internal combustion engine 15 2001
7,000,385 Exhaust gas purification apparatus and method for internal combustion engine 3 2003
 
NGK INSULATORS, LTD. (3)
5,953,907 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means 53 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 64 1999
 
NISSAN MOTOR CO., LTD. (3)
6,116,023 Internal combustion engine with NOx absorbent catalyst 11 1998
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
 
DENSO CORPORATION (2)
6,244,046 Engine exhaust purification system and method having NOx occluding and reducing catalyst 47 1999
7,707,823 Exhaust purification device for internal combustion engine 0 2007
 
MITSUBISHI JIDOSHA KOGYO K.K. (A.K.A. MITSUBISHI MOTORS CORPORATION) (2)
6,718,756 Exhaust gas purifier for use in internal combustion engine 9 2000
6,976,356 Exhaust gas purifier for use in internal combustion engine 7 2004
 
UMICORE AG & CO. KG (2)
7,735,312 Method for determining the instant at which a nitrogen oxide storage catalyst is switched from the storage phase to the regeneration phase and for diagnosing the storage properties of this catalyst 0 2005
8,341,938 Method for determining the instant at which a nitrogen oxide storage catalyst is switched from the storage phase to the regeneration phase and for diagnosing the storage properties of this catalyst 0 2010
 
CONTINENTAL AUTOMOTIVE GMBH (1)
6,438,947 Method for adapting a raw NOx concentration value of an internal combustion engine operating with an excess of air 6 2001
 
DAIMLER AG (1)
6,318,075 Method and device for periodically desulphating a nitrogen oxide or sulphur oxide storage vessel with rich/lean engine cylinder distribution 32 2000
 
HITACHI, LTD. (1)
6,755,015 Apparatus for purifying and controlling exhaust gases 4 2000
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
6,223,525 Air-fuel ratio controlling device for an internal combustion engine 6 1999
 
HONDA MOTOR CO., LTD. (1)
8,033,102 Exhaust emission control device for internal combustion engine, method of controlling the exhaust emission control device, and engine control unit 0 2008
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
7,089,730 Exhaust gas purification method for internal combustion engine 1 2002
 
NIPPONDENSO CO., LTD. (1)
5,784,879 Air-fuel ratio control system for internal combustion engine 13 1996