JP5783202B2 - 内燃機関の異常検出装置 - Google Patents
内燃機関の異常検出装置 Download PDFInfo
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- JP5783202B2 JP5783202B2 JP2013067210A JP2013067210A JP5783202B2 JP 5783202 B2 JP5783202 B2 JP 5783202B2 JP 2013067210 A JP2013067210 A JP 2013067210A JP 2013067210 A JP2013067210 A JP 2013067210A JP 5783202 B2 JP5783202 B2 JP 5783202B2
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- 238000001514 detection method Methods 0.000 title claims description 135
- 230000005856 abnormality Effects 0.000 title claims description 111
- 238000002485 combustion reaction Methods 0.000 title claims description 41
- 239000000446 fuel Substances 0.000 claims description 250
- 239000003054 catalyst Substances 0.000 claims description 117
- 230000007547 defect Effects 0.000 claims description 71
- 239000001301 oxygen Substances 0.000 claims description 67
- 229910052760 oxygen Inorganic materials 0.000 claims description 67
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 66
- 238000011144 upstream manufacturing Methods 0.000 claims description 21
- 238000000746 purification Methods 0.000 claims description 16
- 230000007812 deficiency Effects 0.000 claims description 10
- 238000002347 injection Methods 0.000 description 39
- 239000007924 injection Substances 0.000 description 39
- 239000012041 precatalyst Substances 0.000 description 33
- 238000000034 method Methods 0.000 description 32
- 230000008569 process Effects 0.000 description 31
- 239000007789 gas Substances 0.000 description 19
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- 239000000203 mixture Substances 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 10
- 238000012545 processing Methods 0.000 description 8
- 238000012937 correction Methods 0.000 description 7
- 230000002950 deficient Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000007784 solid electrolyte Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 238000012217 deletion Methods 0.000 description 3
- 230000037430 deletion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
-
- 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
- F02D41/1493—Details
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust 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
- F02D41/14—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
-
- 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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
- G01M15/104—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases using oxygen or lambda-sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2252—Sampling from a flowing stream of gas in a vehicle exhaust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (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)
Description
センサ欠損異常検出手段は、所定回数、下流側センサの出力電圧を取得して、該取得した出力電圧が所定電圧域に含まれる回数に基づいて、該下流側センサの出力の分布を求めることができる。センサ欠損異常検出手段は、空燃比フィードバックストイキ制御が行われているときの下流側センサの出力に基づいて該下流側センサの検出素子の欠損異常を検出することができる。
10 エアフローメータ
15 排気通路
16 触媒浄化装置
17 触媒前センサ(広域空燃比センサ)
18 触媒後センサ(酸素センサ)
20 電子制御ユニット(ECU)
Claims (5)
- 複数の気筒を有する内燃機関の排気通路において排気浄化用触媒の下流側に設けられて排気中の酸素濃度に応じた出力を生じる下流側センサの検出素子の欠損異常を、該下流側センサの出力に基づいて検出するように構成されたセンサ欠損異常検出手段であって、該下流側センサの出力の分布が空燃比が理論空燃比よりもリーンであることを示す領域に偏っていることに基づいて該下流側センサの検出素子に欠損異常があることを検出するセンサ欠損異常検出手段と、
吸入空気量が所定量を越えるとき、前記センサ欠損異常検出手段による前記検出素子の欠損異常の検出を禁止するように構成された禁止手段と、
前記排気浄化用触媒の上流側に設けられた上流側空燃比センサの出力に基づいて気筒間の空燃比ばらつきの度合いを表す値を算出する値算出手段と、
該値算出手段により算出された値と所定値とを比較することにより、気筒間の空燃比ばらつきの度合いが所定レベル以上であることを検出するばらつきレベル検出手段と、
該ばらつきレベル検出手段により気筒間の空燃比ばらつきの度合いが前記所定レベル以上であることが検出されなかったとき、前記禁止手段の作動を禁止する第2禁止手段と
を備えた、内燃機関の異常検出装置。 - 前記センサ欠損異常検出手段は、所定回数、前記下流側センサの出力電圧を取得して、該取得した出力電圧が所定電圧域に含まれる回数に基づいて、該下流側センサの出力の分布を求める、請求項1に記載の内燃機関の異常検出装置。
- 前記センサ欠損異常検出手段は、空燃比フィードバックストイキ制御が行われているときの前記下流側センサの出力に基づいて該下流側センサの検出素子の欠損異常を検出する、請求項1または2に記載の内燃機関の異常検出装置。
- 前記排気浄化用触媒の上流側に設けられた上流側空燃比センサの出力に基づいて気筒間の空燃比ばらつきの度合いを表す値を算出する値算出手段と、
該値算出手段により算出された値に基づいて前記禁止手段における前記所定量を算出する所定量算出手段と
をさらに備えた、請求項1から3のいずれか一項に記載の内燃機関の異常検出装置。 - 前記センサ欠損異常検出手段は、吸入空気量が第1所定量以上のときの前記下流側センサの出力に基づいて該下流側センサの前記検出素子の欠損異常を検出するように構成されていて、該第1所定量は前記所定量よりも少ない、請求項1から4のいずれか一項に記載の内燃機関の異常検出装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013067210A JP5783202B2 (ja) | 2013-03-27 | 2013-03-27 | 内燃機関の異常検出装置 |
US14/216,004 US9341544B2 (en) | 2013-03-27 | 2014-03-17 | Abnormality detecting device of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013067210A JP5783202B2 (ja) | 2013-03-27 | 2013-03-27 | 内燃機関の異常検出装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2014190270A JP2014190270A (ja) | 2014-10-06 |
JP5783202B2 true JP5783202B2 (ja) | 2015-09-24 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2013067210A Expired - Fee Related JP5783202B2 (ja) | 2013-03-27 | 2013-03-27 | 内燃機関の異常検出装置 |
Country Status (2)
Country | Link |
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US (1) | US9341544B2 (ja) |
JP (1) | JP5783202B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5811125B2 (ja) * | 2013-03-27 | 2015-11-11 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP5648706B2 (ja) | 2013-04-19 | 2015-01-07 | トヨタ自動車株式会社 | 内燃機関の空燃比制御装置 |
JP6376169B2 (ja) * | 2016-04-20 | 2018-08-22 | トヨタ自動車株式会社 | ハイブリッド車両 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2827719B2 (ja) * | 1992-07-16 | 1998-11-25 | 三菱自動車工業株式会社 | O2 センサの故障判定方法 |
JP3438298B2 (ja) * | 1994-03-25 | 2003-08-18 | マツダ株式会社 | 空燃比センサの故障検出装置 |
US5845489A (en) * | 1995-11-08 | 1998-12-08 | Denso Corporation | Abnormality detector for air-fuel ratio control system |
US6374818B2 (en) * | 2000-01-31 | 2002-04-23 | Honda Giken Kogyo Kabushiki Kaisha | Apparatus for determining a failure of an oxygen concentration sensor |
JP4682463B2 (ja) | 2001-07-04 | 2011-05-11 | トヨタ自動車株式会社 | 酸素センサの異常診断装置 |
JP3967630B2 (ja) * | 2002-05-16 | 2007-08-29 | 本田技研工業株式会社 | 排ガスセンサの故障を検出する装置 |
KR100435707B1 (ko) * | 2002-05-31 | 2004-06-12 | 현대자동차주식회사 | 차량의 리어 산소센서 고장 판정방법 |
JP4161771B2 (ja) * | 2002-11-27 | 2008-10-08 | トヨタ自動車株式会社 | 酸素センサの異常検出装置 |
JP4135563B2 (ja) * | 2003-06-04 | 2008-08-20 | トヨタ自動車株式会社 | 空燃比センサの異常検出装置 |
JP2005337139A (ja) * | 2004-05-27 | 2005-12-08 | Toyota Motor Corp | 内燃機関の空燃比制御装置 |
JP4779835B2 (ja) | 2006-07-03 | 2011-09-28 | トヨタ自動車株式会社 | 排気ガスセンサの異常診断装置 |
WO2009013600A2 (en) * | 2007-07-24 | 2009-01-29 | Toyota Jidosha Kabushiki Kaisha | Apparatus and method for detecting abnormalair-fuel ratio variation among cylinders of multi-cylinder internal combustion engine |
US7900616B2 (en) * | 2007-12-12 | 2011-03-08 | Denso Corporation | Exhaust gas oxygen sensor monitoring |
JP2009281328A (ja) | 2008-05-23 | 2009-12-03 | Toyota Motor Corp | 多気筒内燃機関の気筒間空燃比ばらつき異常検出装置 |
US8670917B2 (en) * | 2009-10-06 | 2014-03-11 | Toyota Jidosha Kabushiki Kaisha | Air-fuel-ratio imbalance determination apparatus for internal combustion engine |
JP4962656B2 (ja) | 2009-12-09 | 2012-06-27 | トヨタ自動車株式会社 | 内燃機関の空燃比気筒間インバランス判定装置 |
EP2578857A4 (en) | 2010-06-07 | 2018-07-25 | Toyota Jidosha Kabushiki Kaisha | Fuel injection quantity control apparatus |
CN103261604B (zh) * | 2010-12-15 | 2014-11-12 | 丰田自动车株式会社 | 电加热式催化剂的故障检测装置 |
US9261481B2 (en) * | 2013-03-15 | 2016-02-16 | Caterpillar Inc. | Diagnostic system and method for nitrogen oxide sensor |
-
2013
- 2013-03-27 JP JP2013067210A patent/JP5783202B2/ja not_active Expired - Fee Related
-
2014
- 2014-03-17 US US14/216,004 patent/US9341544B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JP2014190270A (ja) | 2014-10-06 |
US20140290348A1 (en) | 2014-10-02 |
US9341544B2 (en) | 2016-05-17 |
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