DK179798B1 - A large two-stroke uniflow scavenged gaseous fueled engine - Google Patents

A large two-stroke uniflow scavenged gaseous fueled engine Download PDF

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Publication number
DK179798B1
DK179798B1 DKPA201770703A DKPA201770703A DK179798B1 DK 179798 B1 DK179798 B1 DK 179798B1 DK PA201770703 A DKPA201770703 A DK PA201770703A DK PA201770703 A DKPA201770703 A DK PA201770703A DK 179798 B1 DK179798 B1 DK 179798B1
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DK
Denmark
Prior art keywords
air
fuel
exhaust gas
engine
gaseous fuel
Prior art date
Application number
DKPA201770703A
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English (en)
Inventor
Kjemtrup Niels
Original Assignee
MAN Energy Solutions
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Application filed by MAN Energy Solutions filed Critical MAN Energy Solutions
Priority to DKPA201770703A priority Critical patent/DK179798B1/da
Priority to CN201811082798.3A priority patent/CN109519305B/zh
Priority to CN202111435727.9A priority patent/CN114278467A/zh
Priority to KR1020180111932A priority patent/KR102181690B1/ko
Priority to JP2018174493A priority patent/JP6721647B2/ja
Publication of DK201770703A1 publication Critical patent/DK201770703A1/da
Application granted granted Critical
Publication of DK179798B1 publication Critical patent/DK179798B1/da
Priority to JP2020075440A priority patent/JP7291662B2/ja

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Classifications

    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
    • F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
    • 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
    • F02M23/00—Apparatus for adding secondary air to fuel-air mixture
    • 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
    • F02B13/00—Engines characterised by the introduction of liquid fuel into cylinders by use of auxiliary fluid
    • F02B13/06—Engines having secondary air mixed with fuel in pump, compressed therein without ignition, and fuel-air mixture being injected into air in cylinder
    • 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
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B23/104—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • 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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • 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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—Injectors peculiar thereto
    • 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
    • F02B75/02—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
    • 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
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • 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)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Claims (17)

  1. PATENTKRAV
    1. Stor turboladet totaktsforbrændingsmotor med længdeskylning, der omfatter:
    et forbrændingskammer afgrænset af en cylinderforing (1), et stempel (10) og et cylinderdæksel (22), skylleluftåbninger (18), der er anbragt i cylinderforingen (1), mindst én udstødningsventil (4), der er anbragt i cylinderdækslet (22), mindst én brændstofventil (30, 31), der er anbragt i cylinderforingen (1), til indsprøjtning af et gasformigt brændstof i forbrændingskammeret, kendetegnet ved en tilførsel af både gasformigt brændstof (40) under tryk og en tilførsel af luft og/eller udstødningsgas (40) under tryk til en brændstofventil (30, 31), at motoren er udformet til at indsprøjte både det gasformige brændstof og luften og/eller udstødningsgassen samtidigt via den mindst ene brændstofventil (30, 31) ind i forbrændingskammeret for at øge momentum for det stof, der sprøjtes af den mindst ene brændstofventil (30, 31) ind i forbrændingskammeret.
  2. 2. Motor ifølge krav 1, hvor det gasformige brændstof og luften og/eller udstødningsgassen indsprøjtes samtidigt i forbrændingskammeret fra den mindst ene brændstofventil (30) som en blanding.
  3. 3. Motor ifølge krav 2, hvor det gasformige brændstof og luften og/eller udstødningsgassen blandes inde i den mindst ene brændstofventil (30).
  4. 4. Motor ifølge krav 2, hvor det gasformige brændstof og luften og/eller udstødningsgassen blandes på opstrømssiden af den mindst ene brændstofventil (30).
  5. 5. Motor ifølge krav 1 til 4, der omfatter en fælles tilførselsledning (42) til luften og/eller udstødningsgassen og til det gasformige brændstof til den mindst ene brændstofventil (30).
  6. 6. Motor ifølge krav 1, hvor det gasformige brændstof og luften og/eller udstødningsgassen indsprøjtes samtidigt fra dysehuller i en dyse af den mindst ene brændstofventil (30).
  7. 7. Motor ifølge krav 1 til 3, eller 6, der omfatter separate tilførselsledninger (41, 45) til luften og/eller udstødningsgassen fra kilden af luft og/eller udstødningsgassen under tryk (44) til den mindst ene brændstofventil (30, 31), og tilførselsledninger til det gasformige brændstof fra kilden af gasformigt brændstof (40) under tryk til den mindst ene brændstofventil (30, 31).
  8. 8. Motor ifølge et hvilket som helst af de foregående krav, der omfatter en styreenhed, der er konfigureret til at styre mængden af luft og/eller udstødningsgas indsprøjtet samtidigt med det gasformige brændstof.
  9. 9. Motor ifølge et hvilket som helst af de foregående krav, der omfatter en flerhed af den mindst ene brændstofventil (30, 31) periferisk fordelt over cylinderforingens (1) periferi.
  10. 10. Motor ifølge et hvilket som helst af de foregående krav, hvor den mindst ene brændstofventil (30, 31) er forsynet med én eller flere indsprøjtningsdyser (39).
  11. 11. Motor ifølge krav 10, hvor den mindst ene brændstofventil (30) er forsynet med en første indgangsåbning forbundet med kilden af gasformigt brændstof (40) under tryk og med en anden indgangsåbning forbundet med kilden af luft og/eller udstødningsgas (44).
  12. 12. Motor ifølge krav 11, hvor den mindst ene brændstofventil (30) omfatter en anordning (33) til blanding af det gasformige brændstof med luften og/eller udstødningsgassen inde i brændstofventilen (30).
  13. 13. Motor ifølge et hvilket som helst af de foregående krav, hvor den samtidige indsprøjtning af både det gasformige brændstof og luften og/eller udstødningsgassen initieres under stemplets (10) slag mod cylinderdækslet (22), fortrinsvis efter at stemplet (20) har passeret skylleluftåbningerne, og endnu mere fortrinsvis på tidspunktet eller lige før tidspunktet, hvor hver udstødningsventil (4) lukkes.
  14. 14. Motor ifølge et hvilket som helst af de foregående krav, forsynet med et antændelsessystem til initiering af antændelse, fortrinsvis ved eller i nærheden af topdødpunktet.
  15. 15. Motor ifølge et hvilket som helst af de foregående krav hvor motoren er udformet til samtidig indsprøjtning af både det gasformige brændstof og luften og/eller udstødningsgassen under et slag af stemplet (10) mod cylinderdækslet (22).
  16. 16. Fremgangsmåde til reduktion af banken ved forbedring af blandingen af gasformigt brændstof med skylleluft i et forbrændingskammer af en stor turboladet totaktsforbrændingsmotor med længdeskylning, hvilken motor omfatter:
    et forbrændingskammer, der er afgrænset af en cylinderforing (1), et stempel (10) og et cylinderdæksel (22), skylleluftåbninger (18), der er anbragt i cylinderforingen (1), en udstødningsventil (4), der er anbragt i cylinderdækslet (22), kendetegnet ved mindst én brændstofventil (30) anbragt i cylinderforingen (1) til indsprøjtning af et gasformigt brændstof og luft og/eller udstødningsgas ind i forbrændingskammeret, hvilken fremgangsmåde omfatter trinnet med tilførsel af gasformigt brændstof under tryk og luft og/eller udstødningsgas under tryk til en brændstofventil (30, 31), og samtidig indsprøjtning af det gasformige brændstof under tryk og luften og/eller udstødningsgassen under tryk ind i forbrændingskammeret via brændstofventilen (30, 31) under et slag af stemplet (10) mod cylinderdækslet (22) for at øge momentum for det stof, der sprøjtes ind i forbrændingskammeret.
  17. 17. Fremgangsmåde ifølge krav 16, hvor luften og/eller udstødningsgassen kun indsprøjtes, når den høje motorbelastning er høj, fortrinsvis kun når motorbelastningen er mere end 60 % af motorens maksimale 10 kontinuerlige ydelse, og endnu mere fortrinsvis kun når motorbelastningen er mere end 70 % af motorens maksimale kontinuerlige ydelse.
DKPA201770703A 2017-09-19 2017-09-19 A large two-stroke uniflow scavenged gaseous fueled engine DK179798B1 (da)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DKPA201770703A DK179798B1 (da) 2017-09-19 2017-09-19 A large two-stroke uniflow scavenged gaseous fueled engine
CN201811082798.3A CN109519305B (zh) 2017-09-19 2018-09-17 大型二冲程直流扫气式气体燃料发动机
CN202111435727.9A CN114278467A (zh) 2017-09-19 2018-09-17 大型二冲程直流扫气式气体燃料发动机
KR1020180111932A KR102181690B1 (ko) 2017-09-19 2018-09-19 대형 2 행정 단류 소기식 기체 연료 엔진
JP2018174493A JP6721647B2 (ja) 2017-09-19 2018-09-19 大型ユニフロー掃気式２サイクルガス燃料エンジン及び大型ユニフロー掃気式２サイクルガス燃料エンジンの動作方法
JP2020075440A JP7291662B2 (ja) 2017-09-19 2020-04-21 大型ユニフロー掃気式２サイクルガス燃料エンジン及び大型ユニフロー掃気式２サイクルガス燃料エンジンの動作方法

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Application Number Priority Date Filing Date Title
DKPA201770703A DK179798B1 (da) 2017-09-19 2017-09-19 A large two-stroke uniflow scavenged gaseous fueled engine

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DK201770703A1 DK201770703A1 (da) 2019-04-03
DK179798B1 true DK179798B1 (da) 2019-06-26

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KR (1) KR102181690B1 (da)
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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK180308B1 (en) * 2019-06-13 2020-10-28 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland A large two-stroke uniflow scavenged gaseous fueled engine and method for controlling conditions in combustion chamber
DK180290B1 (en) 2019-07-05 2020-10-08 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland A gaseous fuel supply system and a method for operating the gaseous fuel supply system
KR102330222B1 (ko) 2019-07-05 2021-11-23 만 에너지 솔루션즈, 필리알 아프 만 에너지 솔루션즈 에스이, 티스크란드 기체 연료 모드를 갖춘 대형 2행정 단류 소기식 엔진
KR20210005520A (ko) * 2019-07-05 2021-01-14 만 에너지 솔루션즈, 필리알 아프 만 에너지 솔루션즈 에스이, 티스크란드 대형 2행정 단류 소기식 기체 연료 엔진
JP2021014851A (ja) * 2019-07-11 2021-02-12 マン・エナジー・ソリューションズ、フィリアル・エフ・マン・エナジー・ソリューションズ・エスイー、ティスクランド 内燃機関
DK180375B1 (en) * 2019-07-11 2021-02-12 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland Internal combustion engine
JP7329488B2 (ja) * 2019-11-15 2023-08-18 エムエーエヌ・エナジー・ソリューションズ・フィリアル・アフ・エムエーエヌ・エナジー・ソリューションズ・エスイー・ティスクランド クロスヘッド式大型低速ターボ過給２ストロークユニフロー掃気内燃機関及びこれを動作させる方法
KR20220104054A (ko) * 2019-12-06 2022-07-25 만 에너지 솔루션즈, 필리알 아프 만 에너지 솔루션즈 에스이, 티스크란드 내연 엔진
CN111636969B (zh) * 2020-06-05 2021-04-16 吉林大学 一种二冲程双燃料发动机的供油供气控制方法及系统
CN112664361B (zh) 2020-12-24 2022-08-26 天津大学 内燃机清洁燃烧的分层喷射再循环废气系统装置
DK181193B1 (en) * 2021-09-28 2023-04-24 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland A large two-stroke uniflow scavenged engine and method for operating cylinders selectively according to the pre-mix process or the compression-ignition process
DK181214B1 (en) * 2021-10-26 2023-05-09 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland A large two-stroke uniflow scavenged gaseous fueled engine and method for controlling supply of liquid fuel
DK181316B1 (en) 2022-06-29 2023-08-09 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland A large turbocharged two-stroke uniflow crosshead dual fuel internal combustion engine

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH033935A (ja) * 1989-05-30 1991-01-10 Fuji Heavy Ind Ltd ２サイクル直噴エンジンの燃料噴射制御装置
JPH05321793A (ja) * 1992-05-19 1993-12-07 Nippondenso Co Ltd 内燃機関の燃料噴射装置
JPH06101553A (ja) * 1992-09-24 1994-04-12 Mazda Motor Corp エンジンの燃料噴射時期制御装置
JPH08158927A (ja) * 1994-12-08 1996-06-18 Tokyo Gas Co Ltd 内燃機関のノッキング抑制方法及び装置
DK177917B1 (da) * 2001-05-23 2015-01-05 Man Diesel & Turbo Deutschland Cylinder i en totakts længdeskyllet krydshovedmotor og fremgangsmåde til mindskning af NOx-dannelse
JP2004263666A (ja) * 2003-03-04 2004-09-24 Osaka Gas Co Ltd エンジンの運転制御方法及びエンジン
JP2006070849A (ja) * 2004-09-03 2006-03-16 Toyota Motor Corp 内燃機関
US7676321B2 (en) * 2007-08-10 2010-03-09 Ford Global Technologies, Llc Hybrid vehicle propulsion system utilizing knock suppression
CN201090324Y (zh) * 2007-09-17 2008-07-23 上海正峰工业有限公司 一种引擎二次进气结构
US8051830B2 (en) * 2009-08-04 2011-11-08 Taylor Jack R Two-stroke uniflow turbo-compound internal combustion engine
WO2012018071A1 (ja) * 2010-08-05 2012-02-09 株式会社Ihi ２サイクルエンジン
JP5811538B2 (ja) * 2011-01-24 2015-11-11 株式会社Ihi ２サイクルエンジン
JP2012233471A (ja) * 2011-04-21 2012-11-29 Mitsubishi Heavy Ind Ltd 内燃機関及び内燃機関の排ガス再循環方法
JP5395848B2 (ja) * 2011-06-24 2014-01-22 三井造船株式会社 低速２サイクルガスエンジン
KR20130055154A (ko) * 2011-11-18 2013-05-28 현대자동차주식회사 엔진의 제트 이그니션 장치
JP2014047690A (ja) * 2012-08-30 2014-03-17 Hitachi Koki Co Ltd エンジン及びエンジン作業機
JP5811979B2 (ja) * 2012-09-24 2015-11-11 株式会社デンソー 燃料噴射弁
JP6036128B2 (ja) * 2012-10-03 2016-11-30 株式会社Ihi ユニフロー掃気式２サイクルエンジン
CA2798870C (en) * 2012-12-17 2014-07-22 Westport Power Inc. Air-enriched gaseous fuel direct injection for an internal combustion engine
KR102172165B1 (ko) * 2015-06-18 2020-10-30 한국조선해양 주식회사 노킹 제어 시스템이 구비된 엔진 및 엔진의 노킹 제어 방법
CN205013151U (zh) * 2015-09-29 2016-02-03 长城汽车股份有限公司 发动机及具有该发动机的车辆

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Publication number Publication date
CN109519305A (zh) 2019-03-26
KR102181690B1 (ko) 2020-11-24
KR20190032244A (ko) 2019-03-27
CN114278467A (zh) 2022-04-05
JP2020122483A (ja) 2020-08-13
CN109519305B (zh) 2022-03-29
JP2019056375A (ja) 2019-04-11
DK201770703A1 (da) 2019-04-03
JP7291662B2 (ja) 2023-06-15
JP6721647B2 (ja) 2020-07-15

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