WO2012131957A1 - ガスエンジンの燃料ガス供給装置 - Google Patents
ガスエンジンの燃料ガス供給装置 Download PDFInfo
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- WO2012131957A1 WO2012131957A1 PCT/JP2011/058126 JP2011058126W WO2012131957A1 WO 2012131957 A1 WO2012131957 A1 WO 2012131957A1 JP 2011058126 W JP2011058126 W JP 2011058126W WO 2012131957 A1 WO2012131957 A1 WO 2012131957A1
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- WIPO (PCT)
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- fuel gas
- intake valve
- gas injection
- valve rod
- injection hole
- Prior art date
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Classifications
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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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/24—Safety means or accessories, not provided for in preceding sub- groups of this group
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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
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
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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
- F02M21/04—Gas-air mixing apparatus
- F02M21/042—Mixer comprising a plurality of bores or flow passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/02—Formulas
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the present invention relates to a fuel gas supply device that supplies fuel gas of a gas engine into an intake passage.
- an injection nozzle is connected to a gas supply pipe, and fuel gas is injected from the nozzle into an air supply manifold. is there.
- the fuel gas injection nozzle protrudes into the intake manifold, the air flow in the intake manifold is disturbed, and the flow resistance of the intake air tends to increase.
- a gas injection nozzle is provided across the intake pipe as disclosed in, for example, Japanese Patent Laid-Open No. 9-268923 (Patent Document 1).
- the gas injection nozzle becomes a resistance against the flow of the intake air, the amount of pumping work required for intake of fresh air into the cylinder or fresh air containing fuel is increased, and the fuel consumption rate is increased.
- Patent Document 2 Japanese Patent No. 3653301 (Patent Document 2), as shown in the attached FIG. 1 (A) when the intake valve is closed and when the intake valve is opened, 1 is the cylinder head, 2 is the intake passage in the cylinder head 1 3 is an intake valve, and 4 is an intake valve rod of the intake valve 3.
- the intake valve rod 4 is provided with a protrusion 5 having a cylindrical surface 5 a which is larger than the diameter of the intake valve rod 4 and is parallel to the intake valve rod 4 concentric with the intake valve rod 4.
- a cylindrical surface 5 a of the protrusion 5 is slidably fitted to a sleeve 6 fixed to the cylinder head 1 so as to protrude into the intake passage 2 in the cylinder head 1.
- the sleeve 6 is provided with a plurality of fuel gas injection holes 6a.
- the present invention has been made to solve such problems, and the movement of the protrusion of the intake valve rod on the inner peripheral surface of a sleeve that slidably fits the protrusion provided on the intake valve rod.
- the fuel gas injection hole which is positioned within the range and is opened and closed as the intake valve rod moves is formed into an oval shape, thereby extending the injection time of the fuel gas injected into the intake passage and The purpose is to promote the mixing with the supply air flowing through the combustion chamber, improve the combustion efficiency in the combustion chamber, and improve the fuel consumption rate.
- the present invention provides a fuel gas supply device for a gas engine that supplies fuel gas to an intake passage by vertically moving an intake valve rod by opening and closing an intake valve.
- a protrusion formed in a part in the axial direction of the intake valve rod, and having a larger outer diameter than the vicinity thereof;
- a fuel gas injection hole formed in the sleeve in a long oval shape in the axial direction of the sleeve and communicating the inside of the sleeve with the intake passage as the intake valve rod moves downward; It is characterized by providing.
- the upper end edge of the ellipse of the fuel gas injection hole is moved in the fuel gas injection timing advance direction.
- the fuel gas injection hole becomes an ellipse, and the amount of fuel gas injection at the beginning of fuel gas injection is reduced. Therefore, by moving the fuel gas in the fuel gas injection timing advance direction, The fuel gas injection amount is ensured and the stirring of the air and the fuel gas is promoted.
- the ellipse of the fuel gas injection hole has a radius R at an end portion and a center length H (between the ellipse axes) of the radius R at both ends. It is good to make it H.
- the ellipse of the fuel gas injection hole has a ratio R / H between the radius R of the end portion and the center length L (between the ellipse axes) of the radius R of both end portions.
- a range of 0.2 ⁇ R / H ⁇ 1.3 is preferable.
- the ellipse axis L2 of the fuel gas injection hole is inclined with respect to the axis L1 of the sleeve.
- the sliding contact position between the outer peripheral surface of the protruding portion of the intake valve rod and the peripheral edge of the fuel gas injection hole changes in the circumferential direction during operation of the intake valve while the intake valve is operating in the vertical direction. Therefore, damage to the outer peripheral surface and partial increase in wear can be suppressed.
- the projecting portion provided on the intake valve rod is slidably fitted on the inner peripheral surface of the sleeve within the movement range of the projecting portion of the intake valve rod, and opens and closes as the intake valve rod moves.
- FIG. 3 (A) shows the shape figure of the fuel gas injection hole of the sleeve which concerns on this invention
- (B) shows the shape figure of the fuel gas injection hole of a prior art
- (C) shows the Y arrow view of (A).
- (D) shows a Z arrow view of (B).
- the comparison figure of the test result by the shape of the fuel gas injection hole of this invention is shown.
- the F arrow figure of FIG. 3 (A) is shown.
- 1, 1 is a cylinder head
- 2 is an intake passage in the cylinder head
- 3 is an intake valve
- 4 is an intake valve rod of the intake valve 3.
- the intake valve rod 4 is provided with a protrusion 5 having a cylindrical surface 5 a which is larger than the diameter of the intake valve rod 4 and is parallel to the intake valve rod 4 concentric with the intake valve rod 4.
- a cylindrical surface 5 a of the protrusion 5 is slidably fitted to a sleeve 6 (commonly known as a gas valve seat) fixed to the cylinder head 1 so as to protrude into the intake passage 2 in the cylinder head 1.
- the cylinder head 1 is provided with an intake valve 3, FIG. 1A shows the case where the intake valve 3 is closed, and FIG. The fully open case is shown.
- the intake valve rod 4 of the intake valve 3 is shown cut in the middle, but penetrates the cylinder head 1 and is reciprocated vertically by a valve drive device (not shown) to open and close the intake port 9.
- the cylinder head 1 is provided with an exhaust valve (not shown).
- the intake valve 3 and the exhaust valve are reciprocally driven so as to open and close the supply / exhaust port at a predetermined timing by a valve driving device (not shown) mechanically connected to a crankshaft (not shown) by a timing gear or the like.
- the fuel gas injection hole 6 a disposed in the sleeve 6 is disposed within the sliding range of the protruding portion 5 of the intake valve 3.
- the fuel gas injection hole 6 a In the position of the intake valve 3 shown in FIG. 1 (A), the fuel gas injection hole 6 a is closed, and the fuel gas supply path 7 and the intake path 2 are isolated by the protrusion of the intake valve 3.
- FIG. 1B the intake valve 3 is in a fully open state, and the fuel gas supply passage 7 and the intake passage 2 have a gap 8 between the outer periphery of the intake valve rod 4 and the inner periphery of the sleeve 6 and the fuel in the sleeve 6.
- the fuel gas communicated via the gas injection holes 6a is injected radially in the direction from the fuel gas injection holes 6a toward the intake passage 2.
- FIG. 2A shows the relationship between the opening area of the intake / exhaust valve and the opening area of the fuel gas injection hole 6a with respect to time (or crank angle), and FIG. 2B shows the protrusion 5 and the sleeve 6 of the intake valve 3.
- the relative positional relationship of the fuel gas injection hole 6a is shown.
- a portion where the exhaust valve opening area E and the intake valve opening area S overlap is an overlap period in which both the intake and exhaust valves are open.
- B indicates the case of the oval fuel gas injection hole 6a
- C indicates the fuel gas injection start timing of the circular fuel gas injection hole 6b
- B 'and C' indicate the fuel gas injection closing timing, respectively.
- G indicates the opening area of the oval fuel gas injection hole 6a
- J indicates the opening area of the circular fuel gas injection hole 6b.
- the opening area of G (solid line) and the opening area of J (broken line) are substantially the same.
- FIG. 3A shows the shape of the fuel gas injection hole 6a as an embodiment of the present application
- FIG. 3B shows the conventional shape
- the fuel gas injection hole 6 a is formed in an oval shape parallel to the axis of the sleeve 6.
- the oval shape is formed with eight fuel gas injection holes 6a inclined obliquely downward from the inner surface of the sleeve 6 along the outer peripheral surface.
- Eight of the fuel gas injection holes 6 a are arranged at substantially equal intervals along the outer periphery of the sleeve 6.
- the fuel gas injection hole 6b has a circular shape, and the flow resistance of the fuel gas is small, so that the fuel gas is injected in a short time. There is a tendency.
- the opening / closing operation is performed in a period (crank angle) where the opening area J (broken line) of the circular fuel gas injection hole 6b is shorter than the opening area G (solid line) of the oval fuel gas injection hole 6a. It has been broken. Therefore, in the case of the oval fuel gas injection hole 6a, the position where the start end X reaches the start end B of the injection hole 6a is a position that is earlier by n than the opening position of the circular fuel gas injection hole 6b (fuel gas injection Timing advance direction).
- the amount of n may be appropriately determined according to engine specifications. Further, as shown in FIG. 5 (A) as viewed in the direction of arrow F in FIG. 3 (A), the ellipse shape has a sufficient distance R between the centers of the radius R at both ends (between the ellipse axes) H with respect to the radius R at both ends. Is getting bigger.
- the fuel gas injection hole 6a provided in the sleeve 6 has a structure in which an oval open upper and lower end range is disposed within a sliding range of the protruding portion 5 of the intake valve 3 and is opened and closed.
- FIG. 5B when the arrow F in FIG. 3A is shown in FIG.
- the oval axis L2 of the oval fuel gas injection hole 6a is inclined with respect to the axis L1 of the sleeve 6. It may be formed with an angle ⁇ .
- the sliding contact position between the outer peripheral surface 5a of the protrusion 5 of the intake valve rod 4 and the peripheral edge of the fuel gas injection hole 6a changes in the circumferential direction during the operation of the intake valve. Damage to the outer peripheral surface and wear can be suppressed.
- FIG. 4 shows a comparison diagram of the combustion test result according to the shape of the fuel gas injection hole 6a.
- the numerical value of a list shows an example by experiment.
- NO. 1 is a conventional circular shape
- NO. 2 is a first example of the present invention
- NO. 3 is a second example of the present invention
- NO. 4 is NO. This is a case where 2 is made to correspond to the mirror engine.
- NO. 1 the total area of the fuel gas injection holes is 1017 mm 2 , the flow resistance of the fuel gas is small due to the circular shape, and the fuel gas is introduced into the intake passage in a short time, and the combustion chamber It is presumed that the fuel gas could not be sufficiently stirred in No. 10, and there is no problem in practical use, but the combustion evaluation leaves room for improvement.
- the total area of the fuel gas injection holes is NO. Greater than 1.
- the ellipse was used and the radius R was reduced, the fuel gas flow resistance increased, and the injection time was increased, stirring with the intake air progressed, and combustion was substantially satisfactory.
- the total area of the fuel gas injection holes is NO. Less than 1.
- NO. 4 is NO.
- the same shape as in Fig. 2 was applied to the mirror cycle engine, and the case where the opening timing of the intake valve 3 was delayed by m was shown.
- the opening area of the gas injection hole was 973 mm 2 (the shaded portion in FIG. 4 was closed), and the required amount of fuel gas could not be supplied. Accordingly, since the fuel gas injection hole 6a provided in the sleeve 6 is disposed within the sliding range of the protrusion 5 of the intake valve 3 and is opened and closed, the ellipse R and the center length H (long) For the circle axis), the ratio of R / H may be determined based on the sliding range of the protrusion 5 of the intake valve 3.
- the fuel gas injection hole 6a is formed into an oval shape to ensure the introduction time of the fuel gas into the intake pipe 2, thereby promoting the agitation of the air and the fuel gas. Combustion can be obtained, combustion efficiency in the combustion chamber is improved, and fuel consumption rate is improved.
- the fuel gas injection unit for supplying the fuel gas into the intake passage may be prevented from projecting into the intake passage so that the flow resistance of the intake air flowing through the intake passage is reduced.
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Abstract
Description
その場合、吸気マニホールド内に燃料ガスの噴射ノズルが突出しているため、吸気マニホールド内の空気流が乱され、吸気の流通抵抗が大きくなる傾向がある。
また、図2(B)に示すように、前記スリーブ6には複数の燃料ガス噴射孔6aが設けられている。
一方、吸気弁棒4の開時は、突起部5の円筒面5aが燃料ガス噴射孔6aより吸気通路2側に移動するため、燃料ガス通路7からの燃料ガスは燃料ガス噴射孔6aから吸気通路2に噴射されるようになっている技術が開示されている。
前記吸気弁棒の軸方向の一部に形成され、辺りに比べ外径が大きい突出部と、
該突出部が摺動可能に嵌合されるスリーブと、
該スリーブに該スリーブの軸方向に長い長円に形成され、前記吸気弁棒の前記突出部の下方向への移動に伴って前記スリーブの内と前記吸気通路とを連通する燃料ガス噴射孔とを備えることを特徴とする。
但し、この実施形態に記載されている構成部品の寸法、材質、形状、その相対配置などは特に特定的な記載がない限り、この発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。
尚、シリンダヘッド1には、図示しない排気弁が配設されている。吸気弁3及び排気弁は図示しないクランク軸にタイミングギア等により機械的に連結された図示しない弁駆動装置によって、所定のタイミングで給排気ポートを開閉するように往復駆動される。
また、スリーブ6に配設される燃料ガス噴射孔6aは、吸気弁3の突出部5の摺動範囲内に配置されている。
同図1(B)には吸気弁3が全開状態であり、燃料ガス供給路7と吸気通路2とは吸気弁棒4の外周とスリーブ6の内周との隙間8及び、スリーブ6の燃料ガス噴射孔6aを介して連通され燃料ガスが燃料ガス噴射孔6aから吸気通路2に向かう方向に放射状に噴射される。
図2(A)において、排気弁開口面積Eと吸気弁開口面積Sが重なっている部分は吸排気弁が共に開いているオーバラップ期間である。
Bは長円燃料ガス噴射孔6aの場合を、Cが円形燃料ガス噴射孔6bの燃料ガス噴射開始時期を示し、B′、C′は夫々燃料ガス噴射閉止時期を示している。
そして、G(実線)は長円燃料ガス噴射孔6aの開口面積を、J(破線)は円形燃料ガス噴射孔6bの開口面積を示している。G(実線)の開口面積とJ(破線)の開口面積とは略同じになっている。
吸気弁開時期Aは、図2(B)において、吸気弁棒4の突起部5の始端XがA位置にあり、図1における燃料ガス供給路7と吸気通路2とは連通されていない。
即ち、燃料ガス噴射孔6aは閉塞されている。
吸気弁3が下降して始端Xが噴射孔6aの始端Bに達すると、図2(A)のBにおいて燃料ガス噴射孔6aが開き始める。吸気弁3がさらに下降するにしたがって燃料ガス噴射孔開口面積は増大し、吸気弁3が上昇に転じると開口面積は減少に転じ、始端Xが再び燃料ガス噴射孔6aの始端Bに達すると、図2(A)におけるB′で燃料ガス噴射孔6aは閉じられる。
図3(A)に示すように、燃料ガス噴射孔6aはスリーブ6の軸線に平行な長円形状に形成されている。長円形状はスリーブ6の内側面から外周面にしたがって斜め下方に向けて傾斜した燃料ガス噴射孔6aが8個形成されている。燃料ガス噴射孔6aの8個はスリーブ6の外周に沿って略均等間隔に配設されている。
図3(B)に従来の燃料ガス噴射孔形状6bを示すとおり、円形状の燃料ガス噴射孔6bとなっており、燃料ガスの流通抵抗が少ないので、燃料ガスが短い時間に多く噴射される傾向にある。図2(A)に示すように、円形燃料ガス噴射孔6bの開口面積J(破線)は長円燃料ガス噴射孔6aの開口面積G(実線)より短い期間(クランク角度)に開閉操作が行われている。
従って、長円形状の燃料ガス噴射孔6aの場合、始端Xが噴射孔6aの始端Bに達する位置は、円形状の燃料ガス噴射孔6bの開口位置に対しnだけ早くなる位置(燃料ガス噴射タイミング進角方向)に形成されている。nの量はエンジンの仕様によって適宜決定すればよい。
また、図5(A)に図3(A)のF矢視を示すように、長円形状は、両端の半径Rに対し、両端の半径R中心間距離(長円軸間)Hが十分に大きくなっている。
但し、スリーブ6に配設される燃料ガス噴射孔6aは、長円の開口上下端範囲が吸気弁3の突出部5の摺動範囲内に配置されて開閉される構造となっている。
尚、本実施形態では図3(A)のF矢視を図5(B)に示すように、長円形状の燃料ガス噴射孔6aの長円軸線L2をスリーブ6の軸線L1に対し、傾斜角度θを有して形成してもよい。
この場合、吸入弁3の作動中に、吸入弁棒4の突出部5の外周面5aと燃料ガス噴射孔6aの周縁との摺接位置が吸入弁作動中に、周方向に変化するので、該外周面への損傷、摩耗が抑制できる。
尚、一覧表の数値は、実験による一例を示したものである。
図4において、NO.1は従来の円形状、NO.2は本発明の第1例、NO.3は本発明の第2例、NO.4はNO.2をミラーエンジンに対応させた場合である。
NO.1の従来の円形状の場合は、燃料ガス噴射孔総面積が1017mm2となっており、円形状のため燃料ガスの流量抵抗が小さく、短期間に燃料ガスが吸気通路に導入され、燃焼室10内での燃料ガスの攪拌が十分にできなかったと推定され、実用上問題はないが、改善の余地を残した燃焼評価となっている。
NO.2は長円形状になっているが両端の半径Rに対し、両端の半径の中心間距離がRより小さくR/H=1.3で、燃料ガス噴射孔総面積が1188mm2となっており、燃料ガス噴射孔総面積はNO.1より大きい。
しかし、長円にして、半径Rを小さくしたので、燃料ガスの流量抵抗が上昇した分、噴射時間が長くなり、吸気との攪拌が進み、略満足した燃焼になった。
しかし、長円にして、半径Rを小さくしたので、燃料ガスの流量抵抗がNO.2に対しさらに上昇した分、噴射時間をさらに長くしたことにより、吸気との攪拌が十分に進み、満足した燃焼になった。
NO.4はNO.2と同じ形状にして、ミラーサイクルエンジンに適用した内容とした場合を試験したもので、吸気弁3の開時期をmだけ遅くした場合を示したもので、吸気弁開期間が短くなり、燃料ガス噴射孔の開口面積が973mm2(図4の網掛け部分が閉塞)となり必要量の燃料ガスの供給ができなかった。
従って、スリーブ6に配設される燃料ガス噴射孔6aは、吸気弁3の突出部5の摺動範囲内に配置されて開閉される構造なので、長円のRと中心間長さH(長円軸間)は吸気弁3の突出部5の摺動範囲に基づいてR/Hの比率を決めればよい。
2 吸気通路
3 吸気弁
4 吸気弁棒
5 突出部
6 スリーブ
7 燃料ガス通路
8 円筒中空部
9 吸気ポート
10 燃焼室
5a 外周面
6a 燃料ガス噴射孔
Claims (5)
- 吸気弁の開閉による吸気弁棒の上下動により、吸気通路に燃料ガスを供給するガスエンジンの燃料ガス供給装置において、
前記吸気弁棒の軸方向の一部に形成され、辺りに比べ外径が大きい突出部と、
該突出部が摺動可能に嵌合されるスリーブと、
該スリーブに該スリーブの軸方向に長い長円に形成され、前記吸気弁棒の前記突出部の下方向への移動に伴って前記スリーブの内と前記吸気通路とを連通する燃料ガス噴射孔とを備えることを特徴とする燃料ガス供給装置。 - 前記燃料ガス噴射孔の長円上端縁を燃料ガス噴射タイミング進角方向に移動させたことを特徴とする請求項1記載のガスエンジンの燃料ガス供給装置。
- 前記燃料ガス噴射孔の長円は端部の半径Rと、両端部の前記半径Rの中心間長さH(長円軸間)とが半径R<中心間長さHとなるようにしたことを特徴とする請求項1記載のガスエンジンの燃料ガス供給装置。
- 前記燃料ガス噴射孔の長円は端部の半径Rと、両端部の前記半径Rの中心間長さH(長円軸間)との比R/Hが、0.2≦R/H≦1.3の範囲になるようにしたことを特徴とする請求項1記載のガスエンジンの燃料ガス供給装置。
- 前記燃料ガス噴射孔の長円軸線L2は前記スリーブの軸線L1に対し傾斜していることを特徴とする請求項1記載のガスエンジンの燃料ガス供給装置。
Priority Applications (6)
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US14/002,839 US20130333667A1 (en) | 2011-03-30 | 2011-03-30 | Fuel gas supply device for gas engine |
JP2013506958A JP5611449B2 (ja) | 2011-03-30 | 2011-03-30 | ガスエンジンの燃料ガス供給装置 |
PCT/JP2011/058126 WO2012131957A1 (ja) | 2011-03-30 | 2011-03-30 | ガスエンジンの燃料ガス供給装置 |
CN201180069129.2A CN103443409B (zh) | 2011-03-30 | 2011-03-30 | 燃气发动机的可燃气体供给装置 |
EP11862480.8A EP2693006B1 (en) | 2011-03-30 | 2011-03-30 | Fuel gas supply device for gas engine |
KR1020137025170A KR101452149B1 (ko) | 2011-03-30 | 2011-03-30 | 가스 엔진의 연료 가스 공급 장치 |
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EP (1) | EP2693006B1 (ja) |
JP (1) | JP5611449B2 (ja) |
KR (1) | KR101452149B1 (ja) |
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CN102900487A (zh) * | 2012-10-24 | 2013-01-30 | 江苏新能动力科技股份有限公司 | 一种活塞气门装置 |
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EP3181855B1 (en) * | 2015-12-14 | 2018-08-29 | Caterpillar Energy Solutions GmbH | Pre-chamber of an internal combustion engine |
US10787939B1 (en) * | 2019-04-01 | 2020-09-29 | Cyclazoom, LLC | Poppet valve for internal combustion engine |
US11506091B2 (en) | 2021-03-03 | 2022-11-22 | Cyclazoom, LLC | Poppet valve and internal combustion piston engine head including same |
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- 2011-03-30 JP JP2013506958A patent/JP5611449B2/ja active Active
- 2011-03-30 KR KR1020137025170A patent/KR101452149B1/ko active IP Right Grant
- 2011-03-30 WO PCT/JP2011/058126 patent/WO2012131957A1/ja active Application Filing
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EP2693006A4 (en) | 2014-09-10 |
EP2693006B1 (en) | 2016-03-30 |
US20130333667A1 (en) | 2013-12-19 |
CN103443409B (zh) | 2016-09-14 |
EP2693006A1 (en) | 2014-02-05 |
JP5611449B2 (ja) | 2014-10-22 |
KR101452149B1 (ko) | 2014-10-16 |
CN103443409A (zh) | 2013-12-11 |
KR20130125825A (ko) | 2013-11-19 |
JPWO2012131957A1 (ja) | 2014-07-24 |
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