JP2012172539A - 可変圧縮比機構を備える多気筒内燃機関 - Google Patents
可変圧縮比機構を備える多気筒内燃機関 Download PDFInfo
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- JP2012172539A JP2012172539A JP2011033015A JP2011033015A JP2012172539A JP 2012172539 A JP2012172539 A JP 2012172539A JP 2011033015 A JP2011033015 A JP 2011033015A JP 2011033015 A JP2011033015 A JP 2011033015A JP 2012172539 A JP2012172539 A JP 2012172539A
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- compression ratio
- mechanical compression
- air
- ratio
- cylinder
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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
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/041—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of cylinder or cylinderhead positioning
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0234—Variable control of the intake valves only changing the valve timing only
- F02D13/0238—Variable control of the intake valves only changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0269—Controlling the valves to perform a Miller-Atkinson cycle
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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
- F02D15/00—Varying compression ratio
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
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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
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- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
【解決手段】排気系に配置された空燃比センサは、排気ガス中に気化燃料が含まれるときには、実際の空燃比より大きな空燃比を出力するものであり、空燃比センサの出力空燃比と実際の空燃比との間のずれ量Aは、排気ガス中の気化燃料の濃度が高いほど大きくなり、各気筒の実際の機械圧縮比が均一となっているか否かを判断するときには、吸気量及び燃料噴射量を変化させることなく、目標機械圧縮比を低下させて可変圧縮比機構を制御し、この制御前後における各気筒の排気ガスに対する空燃比センサの出力空燃比の差dAが均一でなければ、各気筒の実際の機械圧縮比は均一となっていないと判断する。
【選択図】図10
Description
2 シリンダブロック
19 排気マニホルド
21 空燃比センサ
A 可変圧縮比機構
Claims (2)
- 機関排気系に配置された空燃比センサを具備し、前記空燃比センサは、排気ガス中に気化燃料が含まれるときには、実際の空燃比より大きな空燃比を出力するものであり、前記空燃比センサの出力空燃比と実際の空燃比との間のずれ量は、排気ガス中の気化燃料の濃度が高いほど大きくなり、各気筒の実際の機械圧縮比が均一となっているか否かを判断するときには、吸気量及び燃料噴射量を変化させることなく目標機械圧縮比を現在の第一目標機械圧縮比から第二目標機械圧縮比へ低下させて可変圧縮比機構を制御し、前記可変圧縮比機構の制御前後おける各気筒の排気ガスに対する前記空燃比センサの出力空燃比の差が均一でなければ、目標機械圧縮比が前記第一目標機械圧縮比のときにおいて、各気筒の実際の機械圧縮比は均一となっていないと判断することを特徴とする可変圧縮比機構を備える多気筒内燃機関。
- 実際の機械圧縮比が高いほど排気ガス中に含まれる気化燃料の濃度が高くなるために、前記空燃比センサの出力空燃比と実際の空燃比との間の前記ずれ量は実際の機械圧縮比毎に異なって設定され、機械圧縮比毎に設定された前記ずれ量において、機械圧縮比を設定値だけ小さく変化させた前後の前記空燃比センサの前記ずれ量の差は、変化前の機械圧縮比毎に異なっており、各気筒の実際の機械圧縮比が均一となっているか否かを判断するときには、目標機械圧縮比を前記第一目標機械圧縮比から前記設定値だけ低い前記第二目標機械圧縮比として前記可変圧縮比機構を制御し、前記可変圧縮比機構の制御前後における各気筒の排気ガスに対する前記空燃比センサの出力空燃比の差に基づき、目標機械圧縮比が前記第一目標機械圧縮比のときの各気筒の実際の機械圧縮比を推定し、推定された各気筒の実際の機械圧縮比が均一となっていないと判断されたときには、推定された実際の機械圧縮比が前記第一目標機械圧縮比と異なる気筒においては、目標機械圧縮比が前記第一目標機械圧縮比のときの排気ガスに対する前記空燃比センサの出力空燃比は実際の機械圧縮比における前記ずれ量を減算して前記第一目標機械圧縮比における前記ずれ量を加算することにより補正されることを特徴とする請求項1に記載の可変圧縮比機構を備える多気筒内燃機関。
Priority Applications (2)
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JP2011033015A JP5585490B2 (ja) | 2011-02-18 | 2011-02-18 | 可変圧縮比機構を備える多気筒内燃機関 |
US13/399,314 US8862368B2 (en) | 2011-02-18 | 2012-02-17 | Control device for multi-cylinder internal combustion engine equipped with variable compression ratio mechanism |
Applications Claiming Priority (1)
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JP2011033015A JP5585490B2 (ja) | 2011-02-18 | 2011-02-18 | 可変圧縮比機構を備える多気筒内燃機関 |
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JP2012172539A true JP2012172539A (ja) | 2012-09-10 |
JP5585490B2 JP5585490B2 (ja) | 2014-09-10 |
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JP2011033015A Expired - Fee Related JP5585490B2 (ja) | 2011-02-18 | 2011-02-18 | 可変圧縮比機構を備える多気筒内燃機関 |
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US (1) | US8862368B2 (ja) |
JP (1) | JP5585490B2 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2767703B1 (en) * | 2011-10-11 | 2017-10-04 | Toyota Jidosha Kabushiki Kaisha | Control device for internal combustion engine |
WO2014070915A1 (en) * | 2012-10-30 | 2014-05-08 | Blackstock Scott | Variable compression ratio engine |
JP5708772B1 (ja) * | 2013-12-10 | 2015-04-30 | トヨタ自動車株式会社 | 内燃機関 |
DE102014018855B4 (de) * | 2014-12-17 | 2020-04-16 | Audi Ag | Verfahren zum Betreiben einer Brennkraftmaschine sowie entsprechende Brennkraftmaschine |
DE102015221809A1 (de) * | 2015-10-12 | 2017-04-13 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Diagnose einer variablen Verstellung eines Verdichtungsverhältnisses in einem Hubkolben-Verbrennungsmotor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009008016A (ja) * | 2007-06-28 | 2009-01-15 | Toyota Motor Corp | 火花点火式内燃機関 |
WO2010095274A1 (ja) * | 2009-02-20 | 2010-08-26 | トヨタ自動車株式会社 | 火花点火式内燃機関 |
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US5377654A (en) * | 1992-11-12 | 1995-01-03 | Ford Motor Company | System using time resolved air/fuel sensor to equalize cylinder to cylinder air/fuel ratios with variable valve control |
JP3608321B2 (ja) | 1996-12-20 | 2005-01-12 | トヨタ自動車株式会社 | 内燃機関の空燃比制御装置 |
US6595187B1 (en) * | 2000-10-12 | 2003-07-22 | Ford Global Technologies, Llc | Control method for internal combustion engine |
JP3852303B2 (ja) | 2001-02-05 | 2006-11-29 | トヨタ自動車株式会社 | 多気筒内燃機関の制御装置 |
JP4244954B2 (ja) | 2001-02-05 | 2009-03-25 | トヨタ自動車株式会社 | 多気筒内燃機関の制御装置 |
JP4314573B2 (ja) * | 2003-07-30 | 2009-08-19 | 株式会社デンソー | 多気筒内燃機関の気筒別空燃比算出装置 |
JP4663557B2 (ja) * | 2006-03-15 | 2011-04-06 | 日立オートモティブシステムズ株式会社 | 内燃機関の制御装置及び制御方法 |
JP4868284B2 (ja) | 2006-12-15 | 2012-02-01 | トヨタ自動車株式会社 | 排気ガス浄化方法およびその装置 |
JP4858618B2 (ja) * | 2008-01-16 | 2012-01-18 | トヨタ自動車株式会社 | 火花点火式内燃機関 |
JP4915370B2 (ja) | 2008-03-13 | 2012-04-11 | トヨタ自動車株式会社 | 可変圧縮比内燃機関の空燃比制御装置 |
US8176888B2 (en) * | 2011-02-14 | 2012-05-15 | Ford Global Technologies, Llc | Method for starting a mixed fuel engine |
JP5500102B2 (ja) * | 2011-02-24 | 2014-05-21 | マツダ株式会社 | 火花点火式ガソリンエンジンの制御装置 |
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2011
- 2011-02-18 JP JP2011033015A patent/JP5585490B2/ja not_active Expired - Fee Related
-
2012
- 2012-02-17 US US13/399,314 patent/US8862368B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009008016A (ja) * | 2007-06-28 | 2009-01-15 | Toyota Motor Corp | 火花点火式内燃機関 |
WO2010095274A1 (ja) * | 2009-02-20 | 2010-08-26 | トヨタ自動車株式会社 | 火花点火式内燃機関 |
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Publication number | Publication date |
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JP5585490B2 (ja) | 2014-09-10 |
US20120215423A1 (en) | 2012-08-23 |
US8862368B2 (en) | 2014-10-14 |
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