JP2015197078A - 内燃機関のegrシステム - Google Patents
内燃機関のegrシステム Download PDFInfo
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- JP2015197078A JP2015197078A JP2014075938A JP2014075938A JP2015197078A JP 2015197078 A JP2015197078 A JP 2015197078A JP 2014075938 A JP2014075938 A JP 2014075938A JP 2014075938 A JP2014075938 A JP 2014075938A JP 2015197078 A JP2015197078 A JP 2015197078A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 170
- 239000000498 cooling water Substances 0.000 claims description 83
- 238000001816 cooling Methods 0.000 claims description 23
- 230000001629 suppression Effects 0.000 claims description 20
- 239000002826 coolant Substances 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 230000003134 recirculating effect Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 130
- 238000000034 method Methods 0.000 description 28
- 230000008569 process Effects 0.000 description 23
- 238000011144 upstream manufacturing Methods 0.000 description 18
- 238000010438 heat treatment Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 241000372132 Hydrometridae Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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
- 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
- F02B29/0437—Liquid cooled heat exchangers
- F02B29/0443—Layout of the coolant or refrigerant circuit
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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
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/04—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only
- F02B47/08—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including exhaust gas
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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
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D23/00—Controlling engines characterised by their being supercharged
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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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
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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
- F02D41/0025—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]
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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
- F02D41/0025—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]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
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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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
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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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0493—Controlling the air charge temperature
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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
- F02D2041/1472—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 a humidity or water content of the exhaust gases
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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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/10393—Sensors for intake systems for characterising a multi-component mixture, e.g. for the composition such as humidity, density or viscosity
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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
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
(1)EGRクーラ38では、高温のEGRガスがエンジン冷却水により冷却される。この場合、EGRガスの冷却の程度はエンジン冷却水の温度に依存し、例えばエンジン10の暖機完了前はエンジン冷却水が低温であるため、EGRガスも同様に低温の状態となる。
(2)吸気管11においてEGR配管36との合流部(図3のガス合流部A)では、EGRガスが新気で冷却される。なお、ガス合流部Aでは、その上流のEGR配管36内の湿度に対して湿度の上昇が生じることも考えられる。
(3)吸気コンプレッサ31の下流側では、過給に伴う圧力の上昇によりEGRガス及び新気の混合ガスの温度が上昇する。
(4)インタークーラ34では、EGRガス及び新気の混合ガスがI/C冷却水により冷却される。
上記実施形態を例えば次のように変更してもよい。
Claims (7)
- 内燃機関(10)に吸入される吸気を過給する過給手段(30)と、
前記内燃機関の吸気通路において前記過給手段の吸気圧縮部(31)よりも下流側に設けられ、吸気を冷却するインタークーラ(34)と、
前記内燃機関から排出される排気の一部をEGRガスとして排気通路から吸気通路に還流させるEGR配管(36)と、
前記EGR配管に設けられるEGR弁(37)と、
前記EGR配管に設けられるEGRクーラ(38)と、
を備える内燃機関のEGRシステムであって、
前記EGRクーラ内においてEGRガスの冷却によって凝縮水が発生するか否かを判定する第1判定手段(51)と、
前記吸気通路において新気とEGRガスの合流部分で凝縮水が発生するか否かを判定する第2判定手段(51)と、
前記インタークーラ内において吸気の冷却によって凝縮水が発生するか否かを判定する第3判定手段(51)と、
前記各判定手段のいずれかにより凝縮水が発生するとの判定がなされた場合に、それら各判定手段のいずれで凝縮水発生が判定されたかに応じて、各々対応する凝縮水抑制の対策を実施する凝縮水抑制手段(51)と、
を備えることを特徴とする内燃機関のEGRシステム。 - 前記凝縮水抑制手段は、
前記第1判定手段により前記EGRクーラでの凝縮水発生の旨が判定された場合に、前記EGRクーラでの凝縮水対策としてEGRを停止する一方、前記第2判定手段及び前記第3判定手段の各判定結果にかかわらず、前記合流部分での凝縮水対策及び前記インタークーラでの凝縮水対策を実施せず、
前記第1判定手段により前記EGRクーラでの凝縮水発生の旨が判定されていない場合に、前記第2判定手段及び前記第3判定手段の各判定結果に基づいて、前記合流部分での凝縮水対策及び前記インタークーラでの凝縮水対策の一方又は両方を実施する請求項1に記載の内燃機関のEGRシステム。 - 前記凝縮水抑制手段により前記合流部分での凝縮水対策が実施されている状態下で、当該合流部分での凝縮水発生を再判定する手段と、前記凝縮水抑制手段により前記インタークーラでの凝縮水対策が実施されている状態下で、当該インタークーラでの凝縮水発生を再判定する手段との少なくともいずれかを有する再判定手段(51)と、
前記再判定手段により凝縮水が発生するとの判定がなされた場合に、前記EGR弁を通過するEGRガス量を減らすEGR低減処理を実施する二次対策手段(51)と、
を備える請求項2に記載の内燃機関のEGRシステム。 - 前記EGRクーラは、前記内燃機関を冷却するエンジン冷却水を流通させて、該エンジン冷却水との熱交換によりEGRガスを冷却するものであり、
前記第1判定手段は、前記エンジン冷却水の温度を一判定パラメータとして用いて前記EGRクーラでの凝縮水発生を判定し、
前記第2判定手段は、外気温を一判定パラメータとして用いて前記合流部分における凝縮水発生を判定し、
前記第3判定手段は、前記吸気圧縮部の下流側における湿度を一判定パラメータとして前記インタークーラでの凝縮水発生を判定する請求項1乃至3のいずれか1項に記載の内燃機関のEGRシステム。 - 前記凝縮水抑制手段は、前記合流部分での凝縮水対策として、前記EGRクーラでのEGRガスの冷却の度合いを低下させる手段、及び新気の温度を上昇させる手段の少なくともいずれかを有している請求項1乃至4のいずれか1項に記載の内燃機関のEGRシステム。
- 前記凝縮水抑制手段は、前記インタークーラでの凝縮水対策として、前記インタークーラでの前記吸気の冷却の度合いを低下させる手段を有している請求項1乃至5のいずれか1項に記載の内燃機関のEGRシステム。
- 前記インタークーラは、当該インタークーラにI/C冷却水を流通させて、該I/C冷却水との熱交換により吸気を冷却するものであり、
前記I/C冷却水は、前記内燃機関を冷却するエンジン冷却水の循環経路とは別の循環経路を流れ、かつエンジン冷却水よりも低温の状態で保持されるものであり、
前記凝縮水抑制手段は、前記インタークーラでの凝縮水対策として、前記インタークーラに流入する前記I/C冷却水を、前記エンジン冷却水よりも高温とならない範囲で昇温させる請求項6に記載の内燃機関のEGRシステム。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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JP2014075938A JP6364895B2 (ja) | 2014-04-02 | 2014-04-02 | 内燃機関のegrシステム |
EP17175048.2A EP3244055B1 (en) | 2014-04-02 | 2015-03-27 | Egr system for internal-combustion engine |
EP15772852.8A EP3130790B1 (en) | 2014-04-02 | 2015-03-27 | Egr system of internal-combustion engine |
CN201580017471.6A CN106164460B (zh) | 2014-04-02 | 2015-03-27 | 内燃机的egr系统 |
PCT/JP2015/001769 WO2015151484A1 (ja) | 2014-04-02 | 2015-03-27 | 内燃機関のegrシステム |
CN201810958506.1A CN108979840B (zh) | 2014-04-02 | 2015-03-27 | 内燃机的egr系统 |
US15/300,902 US10107235B2 (en) | 2014-04-02 | 2015-03-27 | EGR system for internal-combustion engine |
US15/959,400 US10473063B2 (en) | 2014-04-02 | 2018-04-23 | EGR system for internal-combustion engine |
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JP2014075938A JP6364895B2 (ja) | 2014-04-02 | 2014-04-02 | 内燃機関のegrシステム |
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EP (2) | EP3244055B1 (ja) |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016006310A (ja) * | 2014-06-20 | 2016-01-14 | トヨタ自動車株式会社 | 内燃機関の制御システム |
JP2017160799A (ja) * | 2016-03-07 | 2017-09-14 | 川崎重工業株式会社 | エンジンシステム及び制御方法 |
JP2018071391A (ja) * | 2016-10-26 | 2018-05-10 | いすゞ自動車株式会社 | 内燃機関及び内燃機関の制御方法 |
US10247118B2 (en) | 2016-03-22 | 2019-04-02 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for internal combustion engine |
KR101989180B1 (ko) * | 2017-12-08 | 2019-06-13 | 현대오트론 주식회사 | 배기가스 환류시스템용 흡기 다기관의 온도 제어 장치 및 방법 |
JP2020012449A (ja) * | 2018-07-20 | 2020-01-23 | 三菱自動車工業株式会社 | 排気還流ガスの還流機構 |
JP2021032195A (ja) * | 2019-08-28 | 2021-03-01 | 日産自動車株式会社 | エンジンシステムの制御方法及びエンジンシステムの制御装置 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6364895B2 (ja) | 2014-04-02 | 2018-08-01 | 株式会社デンソー | 内燃機関のegrシステム |
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US10473063B2 (en) | 2019-11-12 |
US10107235B2 (en) | 2018-10-23 |
US20170022940A1 (en) | 2017-01-26 |
EP3130790A1 (en) | 2017-02-15 |
EP3244055B1 (en) | 2020-09-16 |
CN106164460B (zh) | 2019-06-21 |
CN108979840B (zh) | 2020-09-22 |
WO2015151484A1 (ja) | 2015-10-08 |
EP3130790A4 (en) | 2017-04-12 |
JP6364895B2 (ja) | 2018-08-01 |
EP3130790B1 (en) | 2019-09-04 |
CN108979840A (zh) | 2018-12-11 |
CN106164460A (zh) | 2016-11-23 |
EP3244055A1 (en) | 2017-11-15 |
US20180238275A1 (en) | 2018-08-23 |
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