JP6148306B2 - 自己着火式内燃エンジンの燃料室にガス燃料を噴射するための燃料バルブ及び方法 - Google Patents
自己着火式内燃エンジンの燃料室にガス燃料を噴射するための燃料バルブ及び方法 Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims description 275
- 238000002485 combustion reaction Methods 0.000 title claims description 38
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims description 102
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 123
- 239000003921 oil Substances 0.000 description 21
- 239000000295 fuel oil Substances 0.000 description 16
- 230000002000 scavenging effect Effects 0.000 description 15
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 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
- 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
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0686—Injectors
- F02D19/0689—Injectors for in-cylinder direct injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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- 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
- F02D19/0642—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 at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—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 at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
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- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F02B7/00—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel
- F02B7/06—Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel the fuel in the charge being gaseous
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- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
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- F02D19/066—Retrofit of secondary fuel supply systems; Conversion of engines to operate on multiple fuels
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- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
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- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0686—Injectors
- F02D19/0692—Arrangement of multiple injectors per combustion chamber
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- 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
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0686—Injectors
- F02D19/0694—Injectors operating with a plurality of fuels
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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
- F02D19/10—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 peculiar to compression-ignition engines in which the main fuel is gaseous
- F02D19/105—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 peculiar to compression-ignition engines in which the main fuel is gaseous operating in a special mode, e.g. in a liquid fuel only mode for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
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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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
- F02M47/046—Fluid pressure acting on injection-valve in the period of injection to open it
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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
- F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
- F02M67/14—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type characterised by provisions for injecting different fuels, e.g. main fuel and readily self-igniting starting fuel
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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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
- F02B19/108—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
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- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
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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
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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
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- Y02T10/00—Road transport of goods or passengers
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Description
Claims (16)
- 大型低速ターボ過給式2ストローク式自己着火型内燃エンジンの燃焼室にガス燃料を噴射するための燃料バルブ(50)であって、前記燃料バルブ(50)は、
後端と前端とを有する細長の燃料バルブ筺体(52)と、
複数のノズル穴(56)を有するノズル(54)と、
を備え、前記複数のノズル穴(56)は、各々、前記ノズル(54)内のサック室(55)に開口し、前記ノズル(54)は、前記燃料バルブ筺体(52)の前記前端部に配置され、基部(51)と、細長のノズル本体とを備え、前記基部(51)において、前記燃料バルブ筺体(52)の前端に接続され、さらに前記ノズル(54)は、前記ノズル穴(56)を有する閉じた先端(59)を有し、前記ノズル穴(56)は前記先端(59)に近接して設けられ、前記サック室(55)は、前記先端(59)から前記基部(51)にかけて拡がっており、
さらに前記燃料バルブ(50)は、
高圧のガス燃料のソース(60)に接続するためのガス燃料吸入口(53)であって、前記燃料バルブ筺体(52)に設けられるガス燃料吸入口(53)と、
前記燃料バルブ筺体(52)の長手方向穴(77)に摺動可能に受容され、閉鎖位置及び開放位置を有する、軸方向に移動可能なバルブニードル(61)と、
を有し、
前記バルブニードル(61)は、前記閉鎖位置においてはバルブシート(69)上に載っており、前記開放位置においては前記バルブシート(69)から上昇しているようにされ、
前記バルブシート(69)は、前記燃料バルブ筺体(52)に設けられており、前記燃料バルブ筺体(52)の燃料チャンバ(58)と、燃料バルブ筺体(52)の吹出口(68)との間に設けられ、
前記燃料チャンバ(58)と前記ガス燃料吸入口(53)との間を流体が行き来できるようにされ、
前記吹出口(68)と前記サック室(55)との間を流体が行き来できるようにされ、
さらに前記燃料バルブ(50)は、
前記バルブニードル(61)を、前記閉鎖位置と前記開放位置との間で制御可能に移動させるアクチュエータシステムと、
高圧の着火液のソース(57)に連結する着火液導入ポート(78,98)と、
前記着火液導入ポート(78,98)を前記燃料チャンバ(58)に接続する着火液供給管(76,99)であって、固定式の流れ制限部を備える着火液供給管(76,99)と、
を備え、
少量の着火液が、前記流れ制限部を通る一定の流れとなるように、前記流れ制限部は、前記着火液導入ポート(78,98)から前記燃料チャンバ(58)への着火液の流れを制限するように設けられ、それによって、前記バルブニードル(61)が前記バルブシート(69)上に載っている時に、前記バルブシート(69)の上方で前記燃料チャンバ(58)に前記着火液が蓄積するようにされる、
燃料バルブ(50)。 - 前記流れ制限部は、口径固定のオリフィス絞りによる流れ制限部(100)である、請求項1に記載の燃料バルブ。
- 前記バルブニードル(61)は、所定のクリアランスをもって前記長手方向穴(77)に摺動可能に受容され、ここで前記クリアランスは、前記長手方向穴(77)の一端で前記燃料チャンバ(58)に開口しており、前記着火液供給管が、前記着火液を前記クリアランスに供給し、前記クリアランスが前記流れ制限部を形成する、請求項1または2に記載の燃料バルブ。
- 前記着火液は、前記クリアランスにおいてシール液の役割を果たす、請求項3に記載の燃料バルブ。
- 前記長手方向穴(77)と前記バルブニードル(61)との間の前記クリアランスに着火液を送給するために、前記着火液供給管(76)は、前記着火液導入ポート(78)を前記長手方向穴(77)に開口するポートに接続している、請求項3または4に記載の燃料バルブ。
- 前記着火液のソース(57)の圧力は、前記ガス燃料のソース(60)の圧力よりも高い、請求項1から5のいずれかに記載の燃料バルブ。
- 前記バルブニードル(61)は、前記燃料バルブ筐体(52)に摺動可能に受容される、軸方向に変位可能なアクチュエーションピストン(64)とつながっており、前記燃料バルブ筐体(52)と共に、アクチュエーションチャンバ(74)を規定し、
前記アクチュエーションチャンバ(74)と制御ポートとの間は流体が行き来できるようにされており、それによって前記アクチュエーションチャンバ(74)は制御油のソース(97)に接続される、
請求項1から6のいずれかに記載の燃料バルブ。 - 前記バルブニードル(61)は、前記長手方向穴(77)から、前記燃料チャンバ(58)へと突き出ており、そのため前記燃料チャンバ(58)は、前記バルブニードルの一部を取り囲むようにされている、請求項1から7のいずれかに記載の燃料バルブ。
- 前記着火液供給管(76)は、前記燃料バルブ筐体(52)内を走り、前記バルブニードル(61)を通って、前記着火液導入ポート(78)を前記クリアランスに流体的に接続する、請求項3から8のいずれかに記載の燃料バルブ。
- 複数のシリンダ(1)と、高圧ガス燃料供給システムと、高圧着火液供給システムと、前記シリンダに設けられる請求項1から9のいずれかに記載の1又は複数の燃料バルブ(50)とを有する、大型低速ターボ過給式2ストローク式自己着火型内燃エンジンであって、前記燃料バルブ(50)は、前記高圧ガス燃料供給システムと前記着火液供給システムとに接続されている、大型低速ターボ過給式2ストローク式自己着火型内燃エンジン。
- 前記燃料チャンバ(58)に蓄積された着火液の補助を受けることにより、かつその他着火装置を用いることなく、噴射されたガス燃料を自己着火させるように構成されている、請求項10に記載のエンジン。
- 前記ガス燃料が前記サック室(55)に侵入するに際し、前記ガス燃料を着火させるように構成される、請求項10又は11に記載のエンジン。
- 前記ガス燃料のソースが、前記ガス燃料を高圧で前記燃料バルブ(50)に送給し、前記着火液のソースは、前記ガス燃料のソースの圧力よりも高い圧力で前記着火液を送給するように構成されている、請求項10から12の何れか1項に記載のエンジン。
- 大型低速ターボ過給式2ストローク式自己着火型内燃エンジンを作動させる方法であって、該方法は、前記エンジンの燃料バルブ(50)に第1高圧の加圧ガス燃料を供給することを含み、
但し、前記燃料バルブは、後端と前端とを有する、細長の燃料バルブ筺体(52)を備え、前記燃料バルブ(50)は、複数のノズル穴(56)を有する中空ノズル(54)を備え、前記複数のノズル穴(56)は、前記中空ノズル(54)の内部(55)を、前記エンジンのシリンダ(1)内の燃焼室に接続し、前記ノズル(54)は、基部(51)と、細長のノズル本体とを備え、前記基部(51)において、前記燃料バルブ筺体(52)の前端に接続され、さらに前記ノズル(54)は、前記ノズル穴(56)を有する閉じた先端(59)を有し、前記ノズル穴(56)は前記先端(59)に近接して設けられ、前記サック室(55)は、前記先端(59)から前記基部(51)にかけて拡がっており、
さらに前記方法は、
前記燃料バルブ(50)に、前記第1高圧よりも高い第2高圧の着火液を供給することと;
前記中空ノズル(54)の上にあるバルブシート(69)であって、その上に燃料チャンバ(58)が配されているバルブシート(69)と協働する可動バルブニードル(61)を用いて、ガス燃料の噴射を制御すること、ただし前記バルブシート(69)は、前記燃料バルブ筺体(52)に設けられており、前記燃料バルブ筺体(52)の燃料チャンバ(58)と、燃料バルブ筺体(52)の吹出口(68)との間に設けられる、前記制御することと;
前記ガス燃料を用いて前記燃料チャンバ(58)を加圧することと;
前記バルブニードル(61)が前記バルブシート(69)上に載っている間に、少量の着火液の連続的な流れを前記燃料チャンバ(58)に送給し、該着火液が、前記バルブシートの上方に蓄積することを可能にすることと;
前記バルブシート(69)から前記軸方向に移動可能なバルブニードル(61)を上昇させることによってガス燃料噴射イベントを開始し、それによって、前記蓄積した着火液を、前記ガス燃料よりも前に前記中空ノズル(54)に侵入させることと;
を含む、方法。 - 前記ガス燃料が前記着火液の補助を受けることにより前記中空ノズル(54)内部で着火する、請求項14に記載の方法。
- 前記中空ノズル(54)が、エンジンサイクル全体を通して300℃を超えた状態で維持される、請求項14又は15に記載の方法。
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