JP2008095675A - 内燃機関の制御装置 - Google Patents
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- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/07—Mixed pressure loops, i.e. wherein recirculated exhaust gas is either taken out upstream of the turbine and reintroduced upstream of the compressor, or is taken out downstream of the turbine and reintroduced downstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
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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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0611—Fuel type, fuel composition or fuel quality
- F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
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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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/403—Multiple injections with pilot injections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/48—EGR valve position sensors
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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/40—Engine management systems
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Abstract
【解決手段】 内燃機関3の気筒#1内の圧力の変化量を圧力変化量DPとして検出する圧力変化量検出手段(筒内圧センサ21)と、検出された圧力変化量DPに応じて、気筒#1内に発生した熱量を熱発生量QHRL,QHRH,QHRDとして算出する熱発生量算出手段(ECU2)と、内燃機関3の負荷(車速VP、エンジン回転数NE、アクセル開度AP)を検出する負荷検出手段(車速センサ21、クランク角センサ22、アクセル開度センサ28)と、算出された熱発生量QHRL,QHRH,QHRDおよび検出された内燃機関の負荷に基づき、燃料のセタン価CETL,CETH,CETDを推定するセタン価推定手段(ECU2)と、を備えている。
【選択図】 図2
Description
dQHRH = k/(k−1)×Pθ×1000×dVθ
+1/(k−1)×DP×1000×Vθ ……(1)
dQHRH:熱発生率(J/deg)
k:混合気の比熱比
Pθ:筒内圧の絶対値(kPa)
dVθ:筒内容積上昇率(m3/deg)
Vθ:筒内容積(m3)
DP:筒内圧変化量(kPa/deg)
ここで、比熱比kは所定値(例えば1.39)に設定されている。また、Pθ、dVθおよびVθは、いずれもクランク角度位置に応じて定まる値であり、DPは筒内圧センサ21による検出値である。
CETD←K・CETDINT+(1−K)・CETD(n−1)……(2)
ここで、K(フィルタ特性)は1.0未満の所定の重み係数である。この式(2)から明らかなように、重み係数Kを用い、今回求めた走行時暫定セタン価CETDINTと走行時セタン価の前回値CETD(n−1)との加重平均を行うことにより、走行時セタン価CETDが算出される。
2 ECU(熱発生量算出手段、セタン価推定手段、熱発生量記憶手段、
暫定決定手段)
3 内燃機関
7 EGR装置(排ガス還流手段)
7b EGR制御弁(排ガス還流量低減手段)
21 筒内圧センサ(圧力変化量検出手段)
22 クランク角センサ(負荷検出手段)
28 アクセル開度センサ(負荷検出手段)
29 車速センサ(負荷検出手段)
#1〜#4 気筒
DP 圧力変化量
VP 車速(内燃機関の負荷)
NE エンジン回転数(内燃機関の負荷)
PMCMD 要求トルク(内燃機関の負荷)
QHRL 熱発生量
QHRH 熱発生量
QHRD 熱発生量
QEGR EGR量(排ガス還流量)
CETL 低負荷時セタン価(燃料の性状)
CETH 中高負荷時セタン価(燃料の性状)
CETD 走行時セタン価(燃料の性状)
CET1〜3 第1〜第3セタン価(所定の性状)
QHRDREF1〜3 参照用熱発生量
CETDINT 走行時暫定セタン価(暫定的に決定した燃料の性状)
NEOut フィルタ値(フィルタリング処理を施した内燃機関の負荷)
PMCMDOut フィルタ値(フィルタリング処理を施した内燃機関の負荷)
K 重み係数(フィルタリング特性)
Claims (6)
- 内燃機関の気筒内の圧力の変化量を圧力変化量として検出する圧力変化量検出手段と、
当該検出された圧力変化量に応じて、前記気筒内に発生した熱量を熱発生量として算出する熱発生量算出手段と、
前記内燃機関の負荷を検出する負荷検出手段と、
前記算出された熱発生量および前記検出された内燃機関の負荷に基づき、燃料の性状を推定する燃料性状推定手段と、
を備えていることを特徴とする内燃機関の制御装置。 - 前記気筒から排出された排ガスの一部を当該気筒に還流させる排ガス還流手段と、
前記燃料性状推定手段により前記燃料の性状を推定するときに、前記内燃機関の負荷に応じて、前記気筒に還流する排ガスの量を低減させる排ガス還流量低減手段と、
をさらに備えていることを特徴とする請求項1に記載の内燃機関の制御装置。 - 互いに異なる所定の性状を有する燃料の燃焼に伴って発生する熱発生量を、前記所定の性状ごとに、前記内燃機関の負荷に応じて、参照用熱発生量としてあらかじめ記憶する熱発生量記憶手段をさらに備え、
前記燃料性状推定手段は、前記検出された内燃機関の負荷に応じて前記熱発生量記憶手段から検索された前記所定の性状ごとの参照用熱発生量と、前記熱発生量算出手段によって算出された熱発生量に応じて、燃料の性状を推定することを特徴とする請求項1に記載の内燃機関の制御装置。 - 前記燃料性状推定手段は、
前記検索された所定の性状ごとの参照用熱発生量と、前記算出された熱発生量に応じて、燃料の性状を暫定的に決定する暫定決定手段を有し、
当該暫定的に決定した燃料の性状にフィルタリング処理を施すことによって、燃料の性状を推定することを特徴とする請求項3に記載の内燃機関の制御装置。 - 前記燃料性状推定手段は、前記検出された内燃機関の負荷にフィルタリング処理を施し、当該フィルタリング処理を施した内燃機関の負荷に基づき、前記複数の参照用熱発生量を検索することを特徴とする請求項3に記載の内燃機関の制御装置。
- 前記負荷検出手段は、前記内燃機関の負荷として、互いに異なる複数の種類の負荷を検出し、
前記燃料性状推定手段は、前記検出された内燃機関の複数の種類の負荷のそれぞれに、互いに同じフィルタリング特性によりフィルタリング処理を施すことを特徴とする請求項5に記載の内燃機関の制御装置。
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JP2006308151A JP4667347B2 (ja) | 2006-09-11 | 2006-11-14 | 内燃機関の制御装置 |
DE602007000293T DE602007000293D1 (de) | 2006-09-11 | 2007-09-04 | Motorsteuerung für einen Verbrennungsmotor |
EP07017314A EP1900926B1 (en) | 2006-09-11 | 2007-09-04 | Control system for internal combustion engine |
US11/898,275 US7673618B2 (en) | 2006-09-11 | 2007-09-11 | Control system for internal combustion engine |
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JP2006245196 | 2006-09-11 | ||
JP2006308151A JP4667347B2 (ja) | 2006-09-11 | 2006-11-14 | 内燃機関の制御装置 |
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JP2008095675A true JP2008095675A (ja) | 2008-04-24 |
JP4667347B2 JP4667347B2 (ja) | 2011-04-13 |
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EP (1) | EP1900926B1 (ja) |
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DE (1) | DE602007000293D1 (ja) |
Cited By (4)
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WO2012108005A1 (ja) * | 2011-02-08 | 2012-08-16 | トヨタ自動車 株式会社 | セタン価推定装置 |
JP2013007301A (ja) * | 2011-06-23 | 2013-01-10 | Toyota Motor Corp | 内燃機関の制御装置 |
JPWO2013018210A1 (ja) * | 2011-08-03 | 2015-03-02 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP2021092200A (ja) * | 2019-12-11 | 2021-06-17 | マツダ株式会社 | エンジンの制御装置 |
Families Citing this family (28)
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JP4539991B2 (ja) * | 2006-06-02 | 2010-09-08 | ヤンマー株式会社 | セタン価検出手段及び該セタン価検出手段を設けるエンジン |
JP4667346B2 (ja) * | 2006-08-25 | 2011-04-13 | 本田技研工業株式会社 | 内燃機関の制御装置 |
JP4611273B2 (ja) * | 2006-10-31 | 2011-01-12 | 本田技研工業株式会社 | 内燃機関の制御装置 |
JP4784868B2 (ja) * | 2007-03-02 | 2011-10-05 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP2008274883A (ja) * | 2007-05-01 | 2008-11-13 | Toyota Motor Corp | 内燃機関の制御装置 |
DE102007048650B4 (de) * | 2007-10-10 | 2011-06-09 | Audi Ag | Verfahren und Vorrichtung zur Optimierung der Verbrennung von Dieselkraftstoffen mit unterschiedlichen Cetanzahlen in einer Diesel-Brennkraftmaschine |
DE102007054650B3 (de) * | 2007-11-15 | 2009-07-09 | Continental Automotive Gmbh | Ermittlung der Kraftstoffqualität bei einer selbstzündenden Brennkraftmaschine |
JP4600484B2 (ja) * | 2008-01-31 | 2010-12-15 | 株式会社デンソー | 燃料性状検出装置およびそれを用いた燃料噴射システム |
DE102008036896A1 (de) | 2008-08-07 | 2010-02-11 | Bayerische Motoren Werke Aktiengesellschaft | Abgasrückführungssystem für eine Verbrennungskraftmaschine |
DE102009000329A1 (de) * | 2008-10-13 | 2010-04-15 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Verbrennungsmotors |
DE102009002597B3 (de) * | 2009-04-23 | 2010-10-21 | Ford Global Technologies, LLC, Dearborn | Verfahren zur Bestimmung der Cetanzahl eines Kraftstoffes im Leerlauf eines Verbrennungsmotors und Motorsteuerung |
US8473180B2 (en) * | 2010-03-10 | 2013-06-25 | GM Global Technology Operations LLC | On-board fuel property detection using pattern recognition and power spectral analysis of cylinder pressure signal |
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Also Published As
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EP1900926A1 (en) | 2008-03-19 |
US20080262699A1 (en) | 2008-10-23 |
JP4667347B2 (ja) | 2011-04-13 |
DE602007000293D1 (de) | 2009-01-08 |
US7673618B2 (en) | 2010-03-09 |
EP1900926B1 (en) | 2008-11-26 |
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