JP6767271B2 - 低反応性圧縮着火対向ピストンエンジン - Google Patents
低反応性圧縮着火対向ピストンエンジン Download PDFInfo
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- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B7/00—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel
- F02B7/02—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel the fuel in the charge being liquid
- F02B7/04—Methods of operating
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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
- F02B7/00—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel
- F02B7/02—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel the fuel in the charge being liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B7/00—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F01B7/02—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with oppositely reciprocating pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B7/00—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F01B7/02—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with oppositely reciprocating pistons
- F01B7/14—Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with oppositely reciprocating pistons acting on different main shafts
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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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
- F02B23/0624—Swirl flow
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
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- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F02B75/282—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders the pistons having equal strokes
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
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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
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- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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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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- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
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Description
本出願は、本国際出願のために2014年2月12日に出願した米国仮特許出願第61/939,170号に対する優先権を主張するものである。
ストンがTC位置またはその近くの位置にあるときに、対向ピストンの端面間に形成される燃焼室の中の圧縮空気の中に噴射される。他の局面において、噴射は、ポートの閉鎖に次いで、圧縮ストローク中に早めに生じてもよい。空気は、外気が好ましいが、排気ガスや他の希釈剤などの他の成分を含んでも良い。このようないかなる場合においても、空気は、「充填空気(給気)」と呼ばれる。
器163を経由して給気サブシステムに結合される。一部の例において、必ずしも必要なわけではないが、EGR冷却器164が、EGR弁138とEGR混合器163との間に直列でEGRチャネル131に提供される。他の例においては、EGRチャネル131に冷却器が存在しなくてもよい。図2のように、低圧EGRチャネルは同様に構築されてもよい。
80は、噴射器70を通って各シリンダ50に噴射することによって、レールアキュムレータ182hを経由してシリンダに高反応性燃料(「燃料2」)を送達する。この構造体に関して、各シリンダ50は、2つの燃料噴射器68および70を有し、それらは、エンジンの動作条件に応答して成分の量を調節することによって、送達される燃料の反応性を動的に変える能力をECU200に与える。
ができる。可変形状ターボチャージャ(VGT)もまた、所望の組み合わせの吸気マニホルドに対する加圧された空気の与圧と背圧とを得るよう、両者を変更するために使用することができる。3つの空気制御システム、EGR速度、与圧、および空気流が、ECUの指示の下で3つのアクチュエータ(EGR弁、スーパーチャージャ再循環弁、およびVGT)によって制御される。
1つのシリンダ当たりに噴射される燃料の質量:13mg/回転/シリンダ
燃料噴射圧:500バール
噴射1:85度において4mgの毎分換気量(BMinVol)
噴射2:55度において5mgの毎分換気量(BMinVol)
噴射1:15度において4mgの毎分換気量(BMinVol)
この負荷点において燃焼を達成するための空気システム設定点は、
給気圧:1.15バール
充填温度:330K
掃気速度:0.7
内部EGR:35%
外部EGR:30%
燃焼したガスの割合:65%。
閉じ込められた充填の温度:415K
閉じ込められた空気燃料比:30
に設定されてもよい。
これらの条件が、最小容積の2段階後に燃焼質量割合50に到達するような低反応性燃料の添加を可能にし、低速度の圧力上昇を維持し、0.2g/kWh未満のNOxレベルを達成しながら、8段階未満の燃焼持続時間を可能にし、煤の排気をわずかなものにする
ことを可能にする。
Claims (8)
- 2ストロークサイクルの圧縮着火の対向ピストンエンジンを動作させる方法であって、前記対向ピストンエンジンは、長手方向に分離された排気ポート(54)及び吸気ポート(56)を有する少なくとも1つのシリンダ(50)と、前記シリンダのボア(52)に互いに対向して配置された一対のピストン(60、62)と、前記吸気ポートに空気をポンプで送るためのスーパーチャージャ(110)と、前記ピストンの端面間で前記ボアの中に燃料を噴射するための燃料噴射システムと、を備え、当該方法は、
前記スーパーチャージャ内で充填空気を圧縮するステップと、
前記ピストンが前記ボアの各下死点位置から動くと、前記吸気ポートを通って前記ボアの中に、前記スーパーチャージャによって圧縮された充填空気を入れるステップと、
前記充填空気が前記ボアに入れられると、前記充填空気を旋回させるステップと、
前記ピストンが前記ボアの上死点位置に近づくと、前記ピストンの端面間に燃焼室を形成するステップと、
前記燃焼室の中に低反応性燃料の1つまたはそれを超える噴霧パターンを噴射するステップと、を含むことを特徴とする方法。 - 前記低反応性燃料はガソリンである、請求項1に記載の方法。
- 前記1以上の噴霧パターンを噴射するステップは、前記燃焼室の噴射軸に沿って対向する方向で低反応性燃料の対向する噴霧パターンを噴射することを包含する、請求項1に記載の方法。
- 前記低反応性燃料はガソリンである、請求項3に記載の方法。
- 前記1以上の噴霧パターンを噴射するステップは、前記燃焼室の噴射軸に沿って対向する方向で燃料の第1および第2の噴霧パターンを噴射することを包含し、前記第1の噴霧パターンは、低反応性燃料を含み、前記第2の噴霧パターンは、高反応性燃料を含む、請求項1に記載の方法。
- 前記低反応性燃料は、ガソリンであり、前記高反応性燃料は、ディーゼル燃料である、請求項5に記載の方法。
- 前記燃焼室において旋回する充填空気内にタンブルを生成させるステップをさらに包含する、請求項1〜請求項5のいずれか一項に記載の方法。
- エンジン速度に応答して前記エンジンの圧縮比を変えるステップをさらに包含する、請求項1〜請求項5のいずれか一項に記載の方法。
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JP6898346B2 (ja) * | 2015-12-07 | 2021-07-07 | アカーテース パワー,インク. | 高負荷対向ピストンエンジンの空気処理 |
CN109563775B (zh) * | 2016-06-28 | 2021-06-01 | 美国三角鹰发动机有限公司 | 构造成用于在高温燃烧室表面下运行的双循环柴油发动机 |
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US10962350B2 (en) * | 2017-12-14 | 2021-03-30 | Cummins Inc. | Systems and methods for measurement of piston-to-piston clearances in multi-cylinder opposed piston engines |
JP7442779B2 (ja) * | 2019-08-07 | 2024-03-05 | 国立大学法人広島大学 | 対向ピストンエンジン |
US11598259B2 (en) | 2019-08-29 | 2023-03-07 | Achates Power, Inc. | Hybrid drive system with an opposed-piston, internal combustion engine |
JP7266545B2 (ja) * | 2020-03-19 | 2023-04-28 | 三菱重工業株式会社 | 燃料噴射制御装置 |
CN112664333B (zh) * | 2020-04-01 | 2022-09-27 | 长城汽车股份有限公司 | 可变压缩比发动机压缩比控制方法 |
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CN106762098B (zh) | 2020-06-12 |
WO2015123262A1 (en) | 2015-08-20 |
EP3105430A1 (en) | 2016-12-21 |
CN106062336B (zh) | 2019-02-19 |
EP3176401A1 (en) | 2017-06-07 |
EP3105430B1 (en) | 2017-08-16 |
CN106062336A (zh) | 2016-10-26 |
US9995201B2 (en) | 2018-06-12 |
US20160341104A1 (en) | 2016-11-24 |
JP2017101679A (ja) | 2017-06-08 |
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