JP2009097416A - 予混合圧縮自着火機関 - Google Patents
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- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B11/00—Engines characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition, e.g. in different cylinders
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- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
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- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
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- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0057—Specific combustion modes
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/006—Controlling exhaust gas recirculation [EGR] using internal EGR
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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
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
- F02D41/3035—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the premixed charge compression-ignition mode
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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
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3064—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes
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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
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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
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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
- Y02T10/40—Engine management systems
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- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
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Abstract
【解決手段】制御コンピュータCは、アクセルセンサ40によって検出されたアクセル踏み込み量の情報に基づいて、エンジン負荷Fを把握し、クランク角度検出器41によって検出されたクランク角度情報に基づいて、エンジン回転数Nを算出する。運転状態(F,N)が切り換え準備燃焼領域Rにあるときには、制御コンピュータCは、排気通路22から供給通路27を経由して吸気通路33へ排気ガスを供給して燃焼室112内の温度を低下させるように、流量調整弁28を制御する。
【選択図】図1
Description
図1(a)に示すように、シリンダブロック11に形成された気筒111にはピストン12が往復動可能に収容されている。気筒111内に燃焼室112を区画するピストン12は、コネクティングロッド13を介してクランク軸14に連結されている。ピストン12の往復運動は、コネクティングロッド13を介してクランク軸14の回転運動に変換される。気筒は、クランク軸14の軸方向に複数直列に配設されているが、以下においては気筒111に関してのみ説明する。
制御コンピュータCは、ステップS21において運転状態(F,N)がSI燃焼領域(S,R)内にあるか否かを判断している。運転状態(F,N)がSI燃焼領域(S,R)内にある場合(ステップS21においてYES)、制御コンピュータCは、運転状態(F,N)が切り換え準備燃焼領域R内にあるか否かを判断する(ステップS22)。運転状態(F,N)が切り換え準備燃焼領域R内にない場合(ステップS22においてNO)、制御コンピュータCは、SI燃焼制御を行なう(ステップS23)。
ステップS21においてNOの場合〔運転状態(F,N)がSI燃焼領域内にない場合〕、制御コンピュータCは、外部EGR導入を実行する(ステップS211)。
制御コンピュータCは、運転状態検出手段によって検出されたエンジンの運転状態と、前記運転状態に応じて燃焼領域を特定するための燃焼領域マップM1とに基づいて、圧縮自着火燃焼領域と火花点火燃焼領域とのいずれか一方を特定して燃焼制御を行なう制御手段である。
(1)運転状態(F,N)が火花点火燃焼領域(S,R)内の切り換え準備燃焼領域Rにあると特定された状態では、外部EGRが燃焼室112へ導入される。排気通路22から供給通路27を経由して吸気通路33へ供給された排気ガスは、排気通路22、供給通路27、吸気通路33を通過する間に温度低下しており、温度低下した排気ガスが燃焼室112へ導入される。そのため、火花点火燃焼領域(S,R)から圧縮自着火燃焼領域(H,Q)への切り換え(火花点火燃焼から圧縮自着火燃焼への切り換え)の際には、燃焼室112内の温度(燃焼室壁面の温度)が予め低下され、圧縮自着火燃焼が開始されたときには、燃焼室112内の温度(燃焼室壁面の温度)が低下している。その結果、火花点火燃焼から圧縮自着火燃焼へ切り換わるときに適正な圧縮自着火燃焼へ移行することができ、早すぎる自着火やノッキングが防止される。
図5(a)に示すように、吸気カム軸19の端部側には公知の油圧式の吸気側可変バルブタイミング機構31(以下、吸気側VVT31と記す)が設けられており、排気カム軸20の端部側には公知の油圧式の排気側可変バルブタイミング機構32(以下、排気側VVT32と記す)が設けられている。吸気側VVT31は、クランク軸14の回転駆動力を吸気カム軸19に伝達し、かつ油圧によって吸気カム軸19の回転位相を変更可能な構成となっている。排気側VVT32は、クランク軸14の回転駆動力を排気カム軸20に伝達し、かつ油圧によって排気カム軸20の回転位相を変更可能な構成となっている。
制御コンピュータCは、図5(b)にグラフで示す運転状態(F,N)の燃焼領域マップM2を記憶している。燃焼領域マップM2は、燃焼領域マップM1における一時的EGR実行燃焼領域Qがない点のみ燃焼領域マップM1と異なる。領域(S,R)は、火花点火燃焼領域であり、領域Hは、圧縮自着火燃焼が可能な圧縮自着火燃焼領域である。
(4)火花点火燃焼から圧縮自着火燃焼への切り換えの際には、内部EGRの残留量を減らすことによっても、燃焼室112内の温度を下げることができる。
本発明では以下のような実施形態も可能である。
○内部EGRのみを行ない、運転状態(F,N)が切り換え準備燃焼領域Rにあるときは、内部EGR量を減らすようにしてもよい。
○運転状態(F,N)がHCCI燃焼領域H内であっても、必要に応じて外部EGR導入を行なったり、又は内部EGR量を減らすようにしてもよい。
〔1〕切り換え準備燃焼領域が特定されている間は内部EGR又は外部EGRが継続して実行される請求項1及び請求項2のいずれか1項に記載の予混合圧縮自着火機関。
Claims (2)
- 圧縮自着火燃焼と火花点火燃焼とに切り換え可能な予混合圧縮自着火機関において、
前記予混合圧縮自着火機関の排気経路に排出された排気ガスの一部を吸気経路へ供給し、前記吸気経路へ供給された前記排気ガスと新気とを混合する外部EGR手段と、
エンジンの運転状態を検出する運転状態検出手段と、
前記運転状態検出手段によって検出されたエンジンの運転状態と、前記運転状態に応じて燃焼領域を特定するための燃焼領域マップとに基づいて、圧縮自着火燃焼領域と火花点火燃焼領域とのいずれか一方を特定して燃焼制御を行なう制御手段とを備え、
前記燃焼領域マップは、圧縮自着火燃焼領域と、火花点火燃焼領域と、圧縮自着火燃焼領域と火花点火燃焼領域との間の境界に接し、且つ前記火花点火燃焼領域内にある切り換え準備燃焼領域とを備え、
前記制御手段は、前記切り換え準備燃焼領域が特定された状態では、燃焼室内の温度を低下させるように、内部EGRを減ずる実行制御又は外部EGRの実行制御を行なう予混合圧縮自着火機関。 - 前記燃焼領域マップは、前記境界に接し、且つ圧縮自着火燃焼領域内にある一時的EGR実行燃焼領域を備え、前記制御手段は、火花点火燃焼から圧縮自着火燃焼へ移行した際に前記一時的EGR実行燃焼領域が特定されたときには、燃焼室内の温度を低下させるように、内部EGR又を減ずる実行制御は外部EGRの実行制御を一時的に行なう請求項1に記載の予混合圧縮自着火機関。
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JP2007269413A JP4924353B2 (ja) | 2007-10-16 | 2007-10-16 | 予混合圧縮自着火機関 |
DE102008042872.8A DE102008042872B4 (de) | 2007-10-16 | 2008-10-15 | Kompressionszündungs-Kraftmaschine mit Homogenladung |
US12/288,117 US7818112B2 (en) | 2007-10-16 | 2008-10-15 | Homogeneous charge compression ignition engine |
CN2008101679758A CN101413451B (zh) | 2007-10-16 | 2008-10-16 | 预混合压燃内燃机 |
KR1020080101397A KR101183948B1 (ko) | 2007-10-16 | 2008-10-16 | 예혼합 압축 착화 기관 |
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JP4924353B2 JP4924353B2 (ja) | 2012-04-25 |
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JP (1) | JP4924353B2 (ja) |
KR (1) | KR101183948B1 (ja) |
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Cited By (5)
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JP2013133815A (ja) * | 2011-12-27 | 2013-07-08 | Honda Motor Co Ltd | 圧縮着火内燃機関の制御装置 |
WO2014038108A1 (ja) * | 2012-09-07 | 2014-03-13 | マツダ株式会社 | 火花点火式エンジン |
WO2014089912A1 (zh) * | 2012-12-13 | 2014-06-19 | Zhou Xiangjin | 分别控制各气缸燃烧要素的方法和内燃机 |
JP2014185622A (ja) * | 2013-03-25 | 2014-10-02 | Mazda Motor Corp | 火花点火式エンジンの制御装置 |
JP2015124679A (ja) * | 2013-12-26 | 2015-07-06 | マツダ株式会社 | 直噴エンジンの制御装置 |
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US8276551B2 (en) * | 2008-12-30 | 2012-10-02 | GM Global Technology Operations LLC | HCCI combustion moding state control for fuel economy and seamless transitions |
JP5278604B2 (ja) * | 2010-05-11 | 2013-09-04 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
US8915236B2 (en) * | 2011-03-31 | 2014-12-23 | GM Global Technology Operations LLC | Systems and methods for controlling engine combustion stability |
US9279376B2 (en) * | 2011-06-17 | 2016-03-08 | GM Global Technology Operations LLC | System and method for controlling exhaust gas recirculation |
JP5845817B2 (ja) * | 2011-10-31 | 2016-01-20 | スズキ株式会社 | 内燃機関 |
CN103375242B (zh) * | 2012-04-23 | 2019-11-12 | 北京奋进科技有限公司 | 内燃机混合燃烧控制方法 |
JP5870951B2 (ja) * | 2013-03-25 | 2016-03-01 | マツダ株式会社 | 火花点火式エンジンの制御装置 |
US9453481B2 (en) * | 2013-06-04 | 2016-09-27 | Ford Global Technologies, Llc | System and method for operating an engine |
JP5858971B2 (ja) * | 2013-11-18 | 2016-02-10 | 三菱電機株式会社 | 内燃機関の制御装置およびその方法 |
CN104712445B (zh) * | 2013-12-13 | 2019-09-06 | 周向进 | 单燃料压燃与点燃混合的燃烧控制方法及内燃机 |
KR102261363B1 (ko) * | 2017-05-12 | 2021-06-07 | 현대자동차주식회사 | 저압 egr 시스템의 제어 장치 및 제어 방법 |
KR102310415B1 (ko) | 2017-09-07 | 2021-10-08 | 현대자동차 주식회사 | 다단 가변 밸브 리프트 장치 |
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Also Published As
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KR20090038831A (ko) | 2009-04-21 |
US7818112B2 (en) | 2010-10-19 |
KR101183948B1 (ko) | 2012-09-18 |
JP4924353B2 (ja) | 2012-04-25 |
CN101413451B (zh) | 2012-05-23 |
DE102008042872B4 (de) | 2018-05-17 |
DE102008042872A1 (de) | 2009-04-23 |
CN101413451A (zh) | 2009-04-22 |
US20090125213A1 (en) | 2009-05-14 |
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