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WO2008126845A1 - 内燃機関の空燃比制御装置 - Google Patents

内燃機関の空燃比制御装置 Download PDF

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Publication number
WO2008126845A1
WO2008126845A1 PCT/JP2008/056953 JP2008056953W WO2008126845A1 WO 2008126845 A1 WO2008126845 A1 WO 2008126845A1 JP 2008056953 W JP2008056953 W JP 2008056953W WO 2008126845 A1 WO2008126845 A1 WO 2008126845A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel ratio
air fuel
subfb
oxs
combustion engine
Prior art date
Application number
PCT/JP2008/056953
Other languages
English (en)
French (fr)
Inventor
Takahiko Fujiwara
Hiroaki Mizoguchi
Norihisa Nakagawa
Taiga Hagimoto
Naoto Kato
Shuntaro Okazaki
Original Assignee
Toyota Jidosha Kabushiki Kaisha
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 Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Priority to US12/448,346 priority Critical patent/US8230846B2/en
Publication of WO2008126845A1 publication Critical patent/WO2008126845A1/ja

Links

Classifications

    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/148—Using a plurality of comparators
    • 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
    • F02D41/0295—Control according to the amount of oxygen that is stored on the exhaust gas treating apparatus
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors

Landscapes

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

Abstract

　内燃機関の空燃比制御装置に関し、触媒の酸素吸蔵能力の低下を抑制して高い浄化性能を維持できるようにする。 　Ｏ2センサ出力oxsが理論空燃比に相当する基準値oxsrefよりも大きく且つ上側閾値oxerefRよりも小さいときには、サブＦＢ反映係数を空燃比のリーン化につながる所定値vdox2に固定する。Ｏ2センサ出力oxsが基準値oxsrefよりも小さく且つ下側閾値oxsrefLよりも大きいときには、サブＦＢ反映係数を空燃比のリッチ化につながる所定値vdox2に固定する。サブＦＢ反映係数は、Ｏ2センサ出力oxsを燃料噴射量の計算に反映させる係数であり、その増減は排気ガスの空燃比に帰結する。
PCT/JP2008/056953 2007-04-09 2008-04-08 内燃機関の空燃比制御装置 WO2008126845A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/448,346 US8230846B2 (en) 2007-04-09 2008-04-08 Air-fuel ratio control device for internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-101768 2007-04-09
JP2007101768A JP4938532B2 (ja) 2007-04-09 2007-04-09 内燃機関の空燃比制御装置

Publications (1)

Publication Number Publication Date
WO2008126845A1 true WO2008126845A1 (ja) 2008-10-23

Family

ID=39863942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/056953 WO2008126845A1 (ja) 2007-04-09 2008-04-08 内燃機関の空燃比制御装置

Country Status (3)

Country Link
US (1) US8230846B2 (ja)
JP (1) JP4938532B2 (ja)
WO (1) WO2008126845A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8712667B2 (en) 2009-05-21 2014-04-29 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control apparatus for an internal combustion engine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5326969B2 (ja) * 2009-09-28 2013-10-30 トヨタ自動車株式会社 内燃機関の燃料供給量制御装置
JP4973807B2 (ja) * 2010-09-24 2012-07-11 トヨタ自動車株式会社 内燃機関の空燃比制御装置
JP2016183607A (ja) * 2015-03-26 2016-10-20 ダイハツ工業株式会社 内燃機関の制御装置
JP2024010970A (ja) * 2022-07-13 2024-01-25 トヨタ自動車株式会社 内燃機関の制御装置及び触媒異常診断方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0533705A (ja) * 1991-07-31 1993-02-09 Nippondenso Co Ltd 内燃機関の制御装置
JP2002317678A (ja) * 2001-02-16 2002-10-31 Toyota Motor Corp 内燃機関の排気系異常検出装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2514608B2 (ja) * 1986-10-08 1996-07-10 三菱電機株式会社 内燃機関の空燃比制御装置
US5315823A (en) 1991-02-12 1994-05-31 Nippondenso Co., Ltd. Control apparatus for speedily warming up catalyst in internal combustion engine
JP3156604B2 (ja) * 1996-02-28 2001-04-16 トヨタ自動車株式会社 内燃機関の空燃比制御装置
JPH10246139A (ja) 1997-03-04 1998-09-14 Unisia Jecs Corp 内燃機関の空燃比制御装置
WO2001063109A2 (en) * 2000-02-25 2001-08-30 Nissan Motor Co., Ltd. Engine exhaust purification arrangement
JP3622661B2 (ja) 2000-10-06 2005-02-23 トヨタ自動車株式会社 内燃機関の空燃比制御装置
JP2003314334A (ja) * 2002-04-23 2003-11-06 Toyota Motor Corp 内燃機関の空燃比制御装置
US7275364B2 (en) * 2003-03-26 2007-10-02 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust emission control device of internal combustion engine
WO2004094800A1 (ja) * 2003-04-22 2004-11-04 Toyota Jidosha Kabushiki Kaisha 内燃機関の空燃比制御装置
JP2005188330A (ja) 2003-12-24 2005-07-14 Toyota Motor Corp 内燃機関の空燃比制御装置
JP2005273636A (ja) * 2004-03-26 2005-10-06 Mitsubishi Electric Corp 酸素センサ劣化診断装置
JP4513714B2 (ja) * 2005-10-21 2010-07-28 トヨタ自動車株式会社 触媒劣化検出方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0533705A (ja) * 1991-07-31 1993-02-09 Nippondenso Co Ltd 内燃機関の制御装置
JP2002317678A (ja) * 2001-02-16 2002-10-31 Toyota Motor Corp 内燃機関の排気系異常検出装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8712667B2 (en) 2009-05-21 2014-04-29 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control apparatus for an internal combustion engine

Also Published As

Publication number Publication date
JP2008255964A (ja) 2008-10-23
US20090314268A1 (en) 2009-12-24
US8230846B2 (en) 2012-07-31
JP4938532B2 (ja) 2012-05-23

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