EP1061245A3 - Exhaust gas purifying system of internal combustion engine - Google Patents

Exhaust gas purifying system of internal combustion engine Download PDF

Info

Publication number
EP1061245A3
EP1061245A3 EP00112088A EP00112088A EP1061245A3 EP 1061245 A3 EP1061245 A3 EP 1061245A3 EP 00112088 A EP00112088 A EP 00112088A EP 00112088 A EP00112088 A EP 00112088A EP 1061245 A3 EP1061245 A3 EP 1061245A3
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
nox
catalyst
air
recovering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00112088A
Other languages
German (de)
French (fr)
Other versions
EP1061245A2 (en
EP1061245B1 (en
Inventor
Kaname Naganuma
Akira Tayama
Taro Yokoi
Kouji Ishihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP1061245A2 publication Critical patent/EP1061245A2/en
Publication of EP1061245A3 publication Critical patent/EP1061245A3/en
Application granted granted Critical
Publication of EP1061245B1 publication Critical patent/EP1061245B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0806—NOx storage amount, i.e. amount of NOx stored on NOx trap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0811—NOx storage efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

A catalyst is installed in an exhaust passage of an internal combustion engine. The catalyst is of a type that traps and stores NOx in the exhaust gas when the air/fuel ratio of the exhaust gas is higher than the stoichiometric ratio and reduces the stored NOx with the aid of reducing components in the exhaust gas when the air/fuel ratio of the exhaust gas is equal to or lower than the stoichiometric ratio. A detector detects operation load of the engine. A control unit includes a microprocessor that is programmed to carry out calculating the amount of the stored NOx when the air/fuel ratio of the exhaust gas is higher than the stoichiometric ratio; judging whether or not the catalyst needs recovering of the NOx-storing ability thereof in accordance with the calculated amount of the stored NOx; determining the amount of NOx to be reduced in accordance with the engine load detected by the detector; and carrying out a catalyst recovering control when the need of recovering the NOx-storing ability is judged. The catalyst recovering control is a control to keep the air/fuel ratio of the exhaust gas at a predetermined lower ratio for a predetermined period.
EP20000112088 1999-06-14 2000-06-05 Exhaust gas purifying system of internal combustion engine Expired - Lifetime EP1061245B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16670199A JP3812223B2 (en) 1999-06-14 1999-06-14 Engine exhaust purification system
JP16670199 1999-06-14

Publications (3)

Publication Number Publication Date
EP1061245A2 EP1061245A2 (en) 2000-12-20
EP1061245A3 true EP1061245A3 (en) 2001-11-28
EP1061245B1 EP1061245B1 (en) 2003-09-17

Family

ID=15836162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000112088 Expired - Lifetime EP1061245B1 (en) 1999-06-14 2000-06-05 Exhaust gas purifying system of internal combustion engine

Country Status (3)

Country Link
EP (1) EP1061245B1 (en)
JP (1) JP3812223B2 (en)
DE (1) DE60005251T2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10007048A1 (en) * 2000-02-17 2001-08-23 Volkswagen Ag Determining need for regeneration of nitrogen oxide storage catalyser involves taking power into account, internal combustion engine power, remaining oxides of nitrogen storage capacity
US6629409B2 (en) 2001-06-20 2003-10-07 Ford Global Technologies, Llc System and method for determining set point location for oxidant-based engine air/fuel control strategy
US6497093B1 (en) 2001-06-20 2002-12-24 Ford Global Technologies, Inc. System and method for adjusting air-fuel ratio
US6453661B1 (en) 2001-06-20 2002-09-24 Ford Global Technologies, Inc. System and method for determining target oxygen storage in an automotive catalyst
US6453662B1 (en) 2001-06-20 2002-09-24 Ford Global Technologies, Inc. System and method for estimating oxidant storage of a catalyst
US6993899B2 (en) 2001-06-20 2006-02-07 Ford Global Technologies, Llc System and method for controlling catalyst storage capacity
AUPR812301A0 (en) * 2001-10-08 2001-11-01 Orbital Engine Company (Australia) Proprietary Limited Nox control for an internal combustion engine
DE10241500B4 (en) * 2002-09-07 2004-08-12 Audi Ag Method for operating a nitrogen oxide storage catalytic converter of an internal combustion engine, in particular a motor vehicle
JP2005048673A (en) * 2003-07-29 2005-02-24 Nissan Motor Co Ltd Exhaust emission control device for engine
JP4363433B2 (en) 2006-09-29 2009-11-11 株式会社デンソー Exhaust purification equipment
FR2922945B1 (en) * 2007-10-31 2009-11-27 Peugeot Citroen Automobiles Sa METHOD FOR DETERMINING MAINTENANCE INTERVAL FOR MOTOR VEHICLE.
CN104204434B (en) * 2013-02-20 2016-12-07 丰田自动车株式会社 The emission-control equipment of internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0610725A (en) * 1992-06-25 1994-01-18 Toyota Motor Corp Exhaust emission control device for internal combustion engine
US5564283A (en) * 1993-09-30 1996-10-15 Honda Giken Kogyo Kabushiki Kaisha Exhaust emission control system in internal combustion engine
WO1998055742A1 (en) * 1997-06-03 1998-12-10 Siemens Aktiengesellschaft PROCESS FOR REGENERATING AN NOx ACCUMULATOR CATALYTIC CONVERTER
EP0898067A2 (en) * 1997-08-21 1999-02-24 Nissan Motor Co., Ltd. Exhaust gas purifying system of internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2998481B2 (en) 1993-03-16 2000-01-11 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0610725A (en) * 1992-06-25 1994-01-18 Toyota Motor Corp Exhaust emission control device for internal combustion engine
US5564283A (en) * 1993-09-30 1996-10-15 Honda Giken Kogyo Kabushiki Kaisha Exhaust emission control system in internal combustion engine
WO1998055742A1 (en) * 1997-06-03 1998-12-10 Siemens Aktiengesellschaft PROCESS FOR REGENERATING AN NOx ACCUMULATOR CATALYTIC CONVERTER
EP0898067A2 (en) * 1997-08-21 1999-02-24 Nissan Motor Co., Ltd. Exhaust gas purifying system of internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 212 (M - 1593) 15 April 1994 (1994-04-15) *

Also Published As

Publication number Publication date
JP3812223B2 (en) 2006-08-23
DE60005251D1 (en) 2003-10-23
JP2000356124A (en) 2000-12-26
DE60005251T2 (en) 2004-04-08
EP1061245A2 (en) 2000-12-20
EP1061245B1 (en) 2003-09-17

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