JP2014015841A - 多気筒内燃機関の気筒間空燃比ばらつき異常検出装置 - Google Patents
多気筒内燃機関の気筒間空燃比ばらつき異常検出装置 Download PDFInfo
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- JP2014015841A JP2014015841A JP2012151575A JP2012151575A JP2014015841A JP 2014015841 A JP2014015841 A JP 2014015841A JP 2012151575 A JP2012151575 A JP 2012151575A JP 2012151575 A JP2012151575 A JP 2012151575A JP 2014015841 A JP2014015841 A JP 2014015841A
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- 239000000446 fuel Substances 0.000 title claims abstract description 153
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 43
- 230000005856 abnormality Effects 0.000 claims abstract description 106
- 238000001514 detection method Methods 0.000 claims description 25
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 33
- 238000002347 injection Methods 0.000 description 26
- 239000007924 injection Substances 0.000 description 26
- 230000000875 corresponding effect Effects 0.000 description 17
- 238000011144 upstream manufacturing Methods 0.000 description 15
- 239000007789 gas Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 239000012041 precatalyst Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- F02D41/008—Controlling each cylinder individually
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- 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
-
- 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
- F02D41/1497—With detection of the mechanical response of the engine
- F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
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- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
-
- 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
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- 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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
【課題手段】本発明に係る多気筒内燃機関の気筒間空燃比ばらつき異常検出装置は、気筒毎の回転変動を表す第1のパラメータを各気筒について検出し、任意の1気筒に対する第2のパラメータを、当該1気筒を除く残部気筒の第1のパラメータの和として算出し、当該第2のパラメータを各気筒について算出し、これら各気筒の第2のパラメータに基づいて、気筒間空燃比ばらつき異常を検出すると共に気筒間空燃比ばらつき異常が発生している異常気筒を特定する。
【選択図】図8
Description
気筒毎の回転変動を表す第1のパラメータを各気筒について検出し、任意の1気筒に対する第2のパラメータを、当該1気筒を除く残部気筒の第1のパラメータの和として算出し、当該第2のパラメータを各気筒について算出し、これら各気筒の第2のパラメータに基づいて、気筒間空燃比ばらつき異常を検出すると共に気筒間空燃比ばらつき異常が発生している異常気筒を特定する
ことを特徴とする多気筒内燃機関の気筒間空燃比ばらつき異常検出装置が提供される。
5 エアフローメータ
10 スロットルバルブ
11 上流触媒
12 インジェクタ
15 アクセル開度センサ
16 クランク角センサ
17 触媒前センサ
18 触媒後センサ
19 下流触媒
20 電子制御ユニット(ECU)
Claims (6)
- 気筒毎の回転変動を表す第1のパラメータを各気筒について検出し、任意の1気筒に対する第2のパラメータを、当該1気筒を除く残部気筒の第1のパラメータの和として算出し、当該第2のパラメータを各気筒について算出し、これら各気筒の第2のパラメータに基づいて、気筒間空燃比ばらつき異常を検出すると共に気筒間空燃比ばらつき異常が発生している異常気筒を特定する
ことを特徴とする多気筒内燃機関の気筒間空燃比ばらつき異常検出装置。 - 各気筒の第2のパラメータを所定の判定値と比較し、当該判定値に相当する回転変動よりも回転変動が大きくなり、且つ回転が遅くなるような第2のパラメータが存在する場合に、気筒間空燃比ばらつき異常を検出すると共に、当該第2のパラメータに対応する気筒を異常気筒と特定する
ことを特徴とする請求項1に記載の多気筒内燃機関の気筒間空燃比ばらつき異常検出装置。 - 前記気筒間空燃比ばらつき異常が、ある気筒の空燃比が所定の基準空燃比よりもリッチ側にずれるリッチずれ異常に基づくものである
ことを特徴とする請求項1または2に記載の多気筒内燃機関の気筒間空燃比ばらつき異常検出装置。 - 前記判定値を、前記内燃機関の負荷に応じて設定する
ことを特徴とする請求項1〜3のいずれか一項に記載の多気筒内燃機関の気筒間空燃比ばらつき異常検出装置。 - 目標空燃比をストイキとする空燃比フィードバック制御の実行中にばらつき異常検出を実行する
ことを特徴とする請求項1〜4のいずれか一項に記載の多気筒内燃機関の気筒間空燃比ばらつき異常検出装置。 - 前記内燃機関は、少なくとも3つの気筒を備える
ことを特徴とする請求項1〜5のいずれか一項に記載の多気筒内燃機関の気筒間空燃比ばらつき異常検出装置。
Priority Applications (2)
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JP2012151575A JP6160035B2 (ja) | 2012-07-05 | 2012-07-05 | 多気筒内燃機関の気筒間空燃比ばらつき異常検出装置 |
US13/920,191 US20140007856A1 (en) | 2012-07-05 | 2013-06-18 | Inter-cylinder air/fuel ratio variation abnormality detection apparatus and method for multicylinder internal combustion engine |
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JP2012151575A JP6160035B2 (ja) | 2012-07-05 | 2012-07-05 | 多気筒内燃機関の気筒間空燃比ばらつき異常検出装置 |
Publications (2)
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JP2014015841A true JP2014015841A (ja) | 2014-01-30 |
JP6160035B2 JP6160035B2 (ja) | 2017-07-12 |
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JP2012151575A Expired - Fee Related JP6160035B2 (ja) | 2012-07-05 | 2012-07-05 | 多気筒内燃機関の気筒間空燃比ばらつき異常検出装置 |
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US (1) | US20140007856A1 (ja) |
JP (1) | JP6160035B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9732722B1 (en) * | 2015-03-06 | 2017-08-15 | Brunswick Corporation | Methods and systems for cylinder speed increase control to improve combustion uniformity |
JP6624321B1 (ja) * | 2019-03-22 | 2019-12-25 | トヨタ自動車株式会社 | 空燃比センサの異常検出装置、空燃比センサの異常検出システム、データ解析装置、内燃機関の制御装置、および空燃比センサの異常検出方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011220274A (ja) * | 2010-04-13 | 2011-11-04 | Mitsubishi Electric Corp | 内燃機関の異常検出装置 |
JP2012007496A (ja) * | 2010-06-22 | 2012-01-12 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2012031735A (ja) * | 2010-07-28 | 2012-02-16 | Toyota Motor Corp | 多気筒内燃機関の制御装置 |
JP2012047089A (ja) * | 2010-08-26 | 2012-03-08 | Toyota Motor Corp | 空燃比気筒間インバランス判定装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2360365B1 (en) * | 2008-12-05 | 2013-11-13 | Toyota Jidosha Kabushiki Kaisha | Device for judging imbalance of air/fuel ratio among cylinders of multicylinder internal combustion engine |
JP2011027059A (ja) * | 2009-07-28 | 2011-02-10 | Hitachi Automotive Systems Ltd | エンジンの制御装置 |
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2012
- 2012-07-05 JP JP2012151575A patent/JP6160035B2/ja not_active Expired - Fee Related
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2013
- 2013-06-18 US US13/920,191 patent/US20140007856A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011220274A (ja) * | 2010-04-13 | 2011-11-04 | Mitsubishi Electric Corp | 内燃機関の異常検出装置 |
JP2012007496A (ja) * | 2010-06-22 | 2012-01-12 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2012031735A (ja) * | 2010-07-28 | 2012-02-16 | Toyota Motor Corp | 多気筒内燃機関の制御装置 |
JP2012047089A (ja) * | 2010-08-26 | 2012-03-08 | Toyota Motor Corp | 空燃比気筒間インバランス判定装置 |
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JP6160035B2 (ja) | 2017-07-12 |
US20140007856A1 (en) | 2014-01-09 |
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