JP2009236114A - Fuel pump for internal combustion engine - Google Patents

Fuel pump for internal combustion engine Download PDF

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Publication number
JP2009236114A
JP2009236114A JP2009066375A JP2009066375A JP2009236114A JP 2009236114 A JP2009236114 A JP 2009236114A JP 2009066375 A JP2009066375 A JP 2009066375A JP 2009066375 A JP2009066375 A JP 2009066375A JP 2009236114 A JP2009236114 A JP 2009236114A
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Prior art keywords
chamber
discharge
suction
pressure chamber
fuel
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JP2009066375A
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Japanese (ja)
Inventor
Dieter Neumann
ディーター・ノイマン
Gerhard Domberger
ゲルハルト・ドンベールゲール
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MAN Energy Solutions SE
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MAN Diesel SE
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Publication of JP2009236114A publication Critical patent/JP2009236114A/en
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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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new type fuel pump for an internal combustion engine having at least one piston (10). <P>SOLUTION: An intake chamber (16) and a high pressure chamber (17) which are capable of communicating with each other through at least one intake hole (18) cooperate with a piston. The piston (10) blocks the intake hole (18) to prevent the fuel from flowing from the intake chamber (16) into the high pressure chamber (17), or opens the intake hole (18) to allow the high pressure chamber (17) to become full of the fuel from the intake chamber (16). The fuel pump includes a discharge chamber (19) which is separated from the intake chamber (16). The discharge chamber (19) can communicate with the high pressure chamber (17) through at least one discharge groove (24) and at least one discharge hole (22), and the piston (10) opens the intake hole (18) to allow the fuel to flow from the intake chamber (16) into the high pressure chamber (17), or opens the discharge hole (22) to allow the fuel to flow out of the pressure chamber (17) to the discharge chamber (19). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、請求項１のおいて書きに記載の内燃機関のための燃料ポンプ、すなわち燃料噴射ポンプに関する。   The present invention relates to a fuel pump for an internal combustion engine as set forth in claim 1, that is, a fuel injection pump.

実践から知られている、傾斜エッジ制御される、内燃機関のためのピストン式高圧燃料噴射ポンプは通常ピストンを有しており、吸入室および高圧室は燃料ポンプのピストンと協働する。燃料ポンプの吸入室および高圧室は通常、少なくとも１つの吸入孔を介して互いに連通されており、燃料ポンプのピストンはある位置においてはそれぞれの吸入孔を塞いで、吸入室から高圧室へ燃料が流入するのを妨げている。ピストンが別の位置にあれば、当該ピストンはそれぞれの吸入孔を開放し、吸入室からの燃料で高圧室が満たされるのを可能にする。燃料は、いわゆる前給送システムを介して燃料ポンプの吸入室内へと達し、燃料ポンプのピストンの位置に応じて吸入室からそれぞれの吸入孔を介して高圧室へと達するが、その際ピストンの位置はカムを介して制御される。   A piston-type high-pressure fuel injection pump for an internal combustion engine, known from practice, with a tilted edge, usually has a piston, the suction chamber and the high-pressure chamber cooperating with the piston of the fuel pump. The suction chamber and the high-pressure chamber of the fuel pump are normally connected to each other via at least one suction hole, and the piston of the fuel pump closes each suction hole at a certain position so that fuel can be transferred from the suction chamber to the high-pressure chamber. Blocking inflow. If the piston is in a different position, it opens its respective suction hole, allowing the high pressure chamber to be filled with fuel from the suction chamber. The fuel reaches the suction chamber of the fuel pump through a so-called pre-feed system, and reaches the high pressure chamber from the suction chamber through the respective suction holes according to the position of the piston of the fuel pump. The position is controlled via a cam.

ピストンがそれぞれの吸入孔を塞いでいる場合には、吸入室から高圧室への燃料の流入は妨げられ、燃料は高圧室において大きく圧縮されるため、内燃機関のシリンダーに一定の圧力で噴射され得る。ピストンがそれぞれの吸入孔を再び開放し始めるとすぐに、噴射段階が終了し、燃料は高圧室から燃料ポンプの吸入室へと逆流する。   When the pistons block the respective suction holes, the flow of fuel from the suction chamber to the high pressure chamber is hindered and the fuel is greatly compressed in the high pressure chamber, so that it is injected at a constant pressure into the cylinder of the internal combustion engine. obtain. As soon as the pistons begin to open their respective suction holes again, the injection phase ends and fuel flows back from the high-pressure chamber to the suction chamber of the fuel pump.

上記のような燃料ポンプのピストンは制御エッジ、すなわち給送開始制御エッジと給送終了制御エッジとを有しており、当該制御エッジは、いわゆる有効ストロークを決定し、それによって燃料ポンプの噴射量を決定する。吸入室を高圧室と連通させているそれぞれの吸入孔は、ピストンの制御エッジによって開閉される。それぞれの吸入孔が閉じているとき、高圧室にある燃料は、上方へ移動するピストンによってそれぞれの吸入孔へと押し戻され、当該逆流はそれぞれの吸入孔において、キャビテーションの泡を生み出す。それから、ポンプピストンの給送終了制御エッジがそれぞれの吸入孔を再び開放すると、それぞれの吸入孔の圧力が大きく上昇し、それによってキャビテーションの泡は内破しかねない。泡の内破により、ピストンの制御エッジ領域や、それぞれの吸入孔内部においてキャビテーション損傷をもたらしかねない。それゆえ、上記のようなキャビテーション損傷に対して耐久性のある燃料ポンプが、必要となる。   The piston of the fuel pump as described above has a control edge, that is, a feed start control edge and a feed end control edge. The control edge determines a so-called effective stroke, and thereby an injection amount of the fuel pump. To decide. Each suction hole that connects the suction chamber to the high pressure chamber is opened and closed by a control edge of the piston. When each suction hole is closed, the fuel in the high pressure chamber is pushed back into the respective suction hole by the upward moving piston, and the backflow creates cavitation bubbles in each suction hole. Then, when the feed end control edge of the pump piston reopens the respective suction holes, the pressure in the respective suction holes is greatly increased, and the cavitation bubbles may be breached. Bubble implosion can cause cavitation damage in the control edge area of the piston and within each suction hole. Therefore, there is a need for a fuel pump that is durable against cavitation damage as described above.

上述のことから、本発明の課題は、新式の燃料ポンプを提供することにある。当該課題は、請求項１に記載の燃料ポンプによって解決される。本発明に係る燃料ポンプは、吸入室から分離された排出室を備えている。当該排出室は、少なくとも１つの排出溝と少なくとも１つの排出孔とを介して高圧室と連通可能であり、排出室と高圧室とは、それぞれのピストンがそれぞれの吸入孔を開放して吸入室から高圧室へ燃料が流入するのを可能にするか、あるいはそれぞれの排出孔を開放して高圧室から排出室へ燃料が流出するのを可能にするよう、連通できるようになっている。   In view of the above, an object of the present invention is to provide a new type fuel pump. This problem is solved by the fuel pump according to claim 1. The fuel pump according to the present invention includes a discharge chamber separated from the suction chamber. The discharge chamber can communicate with the high-pressure chamber via at least one discharge groove and at least one discharge hole. The discharge chamber and the high-pressure chamber have a suction chamber in which each piston opens a respective suction hole. It is possible to communicate with each other to allow fuel to flow into the high pressure chamber or to open the respective discharge holes to allow fuel to flow from the high pressure chamber to the discharge chamber.

本発明に係る燃料ポンプにおいては、高圧室への燃料の流入は、高圧室からの燃料の流出から分離されている。すなわち、燃料ポンプが、少なくとも１つの吸入孔を介して高圧室と連通可能な吸入室に加え、少なくとも１つの排出孔を介して高圧室と連通可能で、かつ吸入室から分離された排出室を備えることにより、燃料の流入と流出とが分離されている。   In the fuel pump according to the present invention, the inflow of fuel into the high pressure chamber is separated from the outflow of fuel from the high pressure chamber. That is, in addition to the suction chamber capable of communicating with the high-pressure chamber via at least one suction hole, the fuel pump can communicate with the high-pressure chamber via at least one discharge hole and separated from the suction chamber. By providing, inflow and outflow of fuel are separated.

上記のように分離されていることにより、それぞれの吸入孔および吸入室において給送終了時に圧力上昇が生じて、当該圧力上昇によってそれぞれの吸入孔内にあるキャビテーションの泡が内破するのを回避することができる。キャビテーション損傷は非常に効果的に回避できる。   By separating as described above, a pressure increase occurs at the end of feeding in each suction hole and suction chamber, and the cavitation bubbles in each suction hole are prevented from being breached by the pressure increase. can do. Cavitation damage can be avoided very effectively.

好適には、吸入室および排出室において異なる高さの圧力が調整可能であり、吸入室では排出室より高い圧力がかかる。それにより、キャビテーションの泡が発生するのを効果的に妨げることができる。さらに、排出室において、あってはならない圧力上昇が起こるのを防ぐことができる。   Preferably, pressures of different heights can be adjusted in the suction chamber and the discharge chamber, with a higher pressure in the suction chamber than in the discharge chamber. Thereby, it is possible to effectively prevent the generation of cavitation bubbles. Furthermore, it is possible to prevent a pressure increase that should not occur in the discharge chamber.

本発明の好ましいさらなる形態は、従属請求項と以下の記載とから明らかとなる。本発明の実施例は図に基づいて詳述されるが、それに限定されるものではない。図に示されるのは、以下である。   Preferred further forms of the invention will become apparent from the dependent claims and the following description. Embodiments of the present invention will be described in detail with reference to the drawings, but are not limited thereto. The following is shown in the figure.

本発明に係る、内燃機関のための燃料ポンプの、概略断面図の抜粋である。2 is an excerpt from a schematic cross-sectional view of a fuel pump for an internal combustion engine according to the present invention.

図１は、本発明に係る燃料ポンプ、すなわち、特にディーゼル内燃機関で使用される、いわゆる傾斜エッジ制御されるピストン式高圧燃料噴射ポンプの概略断面図を示している。   FIG. 1 shows a schematic cross-sectional view of a fuel pump according to the invention, i.e. a so-called inclined edge controlled piston-type high-pressure fuel injection pump used in particular in diesel internal combustion engines.

図１の燃料ポンプは、ポンプシリンダー１１においてガイドされているピストン１０を備えており、ピストン１０はカム１２を介して制御され、ポンプシリンダー１１において上下に移動可能なようになっている。ピストン１０は、そのピストンヘッドの領域において、制御エッジすなわち給送開始制御エッジ１３と給送終了制御エッジ１４とを備えている。   The fuel pump shown in FIG. 1 includes a piston 10 guided in a pump cylinder 11, and the piston 10 is controlled via a cam 12 and can move up and down in the pump cylinder 11. The piston 10 has a control edge, that is, a feed start control edge 13 and a feed end control edge 14 in the area of the piston head.

２つの制御エッジ１３，１４は、共にいわゆる有効ストロークを規定しており、それによって燃料ポンプの噴射量を規定している。燃料ポンプのピストン１０は、ポンプハウジング１５に収められている吸入室１６およびポンプシリンダー１１の高圧室１７と協働し、吸入室１６は少なくとも１つの吸入孔１８を介して高圧室１７と連通可能である。図１には、吸入室１６を高圧室１７と連通可能にする吸入孔１８が、単に１つだけ示されている。上記のような吸入孔は、複数あってもよい。   The two control edges 13 and 14 both define a so-called effective stroke, thereby defining the fuel pump injection amount. The piston 10 of the fuel pump cooperates with a suction chamber 16 housed in a pump housing 15 and a high pressure chamber 17 of the pump cylinder 11, and the suction chamber 16 can communicate with the high pressure chamber 17 through at least one suction hole 18. It is. FIG. 1 shows only one suction hole 18 that allows the suction chamber 16 to communicate with the high-pressure chamber 17. There may be a plurality of suction holes as described above.

本発明に係る燃料ポンプは、吸入室１６に加えて排出室１９を備えている。当該排出室１９は、同様にポンプハウジング１５に収められており、仕切り壁２０を介して吸入室１６から分離されている。ポンプピストン１０の軸方向に見て、吸入室１６は排出室１９から分離されており、すなわち吸入室１６は排出室１９よりも、導管２１に対して近い距離にあるように分離されており、高圧室１７で圧縮された燃料を内燃機関のシリンダーに噴射するため、高圧室１７は導管２１を介して、記載されていない噴射ノズルと連結されている。上記のような導管２１は、複数あってもよい。   The fuel pump according to the present invention includes a discharge chamber 19 in addition to the suction chamber 16. The discharge chamber 19 is similarly housed in the pump housing 15 and separated from the suction chamber 16 via the partition wall 20. When viewed in the axial direction of the pump piston 10, the suction chamber 16 is separated from the discharge chamber 19, that is, the suction chamber 16 is separated from the discharge chamber 19 so as to be closer to the conduit 21. In order to inject the fuel compressed in the high-pressure chamber 17 into the cylinder of the internal combustion engine, the high-pressure chamber 17 is connected via a conduit 21 to an injection nozzle not shown. There may be a plurality of conduits 21 as described above.

排出室１９は、少なくとも１つの排出孔２２と少なくとも１つの排出溝２４とを介して高圧室１７と連通可能であり、それぞれの排出孔２２はそれぞれの吸入孔１８から空間的に分離されており、ピストン１０の軸方向に見て、仕切り壁２３によって互いに分離されるようになっている。排出室１９は、それぞれの排出孔２２とそれぞれの排出溝２４とを介して高圧室１７と連通可能であり、排出室１９と高圧室１７とは、ピストン１０がそれぞれの吸入孔１８を開放して吸入室１６から高圧室１７へ燃料が流入するのを可能にするか、あるいはそれぞれの排出孔２２を開放して高圧室１７からそれぞれの排出溝２４を介して排出室１９へ燃料が流出するのを可能にするよう、連通できるようになっている。   The discharge chamber 19 can communicate with the high-pressure chamber 17 through at least one discharge hole 22 and at least one discharge groove 24, and each discharge hole 22 is spatially separated from each suction hole 18. When viewed in the axial direction of the piston 10, they are separated from each other by the partition wall 23. The discharge chamber 19 can communicate with the high-pressure chamber 17 through the respective discharge holes 22 and the respective discharge grooves 24. The discharge chamber 19 and the high-pressure chamber 17 have the piston 10 that opens the respective suction holes 18. The fuel can flow into the high pressure chamber 17 from the suction chamber 16 or the respective discharge holes 22 are opened and the fuel flows out from the high pressure chamber 17 into the discharge chamber 19 through the respective discharge grooves 24. It is possible to communicate so that it is possible.

それゆえに、吸入室１６がそれぞれの吸入孔１８を介して高圧室１７と連通されるか、あるいは排出室１９がそれぞれの排出孔２２およびそれぞれの排出溝２４を介して高圧室１７と連通されるかのどちらかである。吸入室１６と排出室１９とが同時に、高圧室１７と連通されることは決してない。   Therefore, the suction chamber 16 is communicated with the high-pressure chamber 17 via the respective suction holes 18, or the discharge chamber 19 is communicated with the high-pressure chamber 17 via the respective discharge holes 22 and the respective discharge grooves 24. Either. The suction chamber 16 and the discharge chamber 19 are never in communication with the high-pressure chamber 17 at the same time.

それゆえ本発明の基本思想は、上下に設けられ空間的に互いに分離された孔、すなわち、互いに分離されるとともに離間した空間、つまり吸入室１６あるいは排出室１９に出口を有している、少なくとも１つの吸入孔１８および少なくとも１つの排出孔２２とによって、高圧室１７の燃料充満と、高圧室１７の排出とを空間的に互いに分離することである。   Therefore, the basic idea of the present invention is that holes provided vertically and separated spatially from each other, that is, separated from each other and separated from each other, that is, have an outlet in the suction chamber 16 or the discharge chamber 19, at least By one suction hole 18 and at least one discharge hole 22, the fuel filling of the high pressure chamber 17 and the discharge of the high pressure chamber 17 are spatially separated from each other.

高圧室１７の燃料充満と排出とを空間的に互いに分離することにより、吸入室１６において給送終了時に、排出プロセスによる圧力上昇が生じず、その結果存在しているかもしれないキャビテーションの泡が、それぞれの吸入孔１８において内破できなくなる。給送終了制御エッジ１４がそれぞれの排出孔２２を開放すると、それぞれの導管２１を介して噴射弁へと送られない、高圧室１７の燃料は、それぞれの排出孔２２とそれぞれの排出溝２４とを介して排出室１９へと押しやられ得る。   By separating the fuel filling and discharge of the high-pressure chamber 17 spatially from each other, there is no pressure increase due to the discharge process at the end of feeding in the suction chamber 16, resulting in cavitation bubbles that may be present. The inner hole 18 cannot be breached. When the feed end control edge 14 opens the respective discharge holes 22, the fuel in the high-pressure chamber 17 that is not sent to the injection valve via the respective conduits 21 flows into the respective discharge holes 22 and the respective discharge grooves 24. Can be pushed into the discharge chamber 19 via.

吸入室１６と排出室１９とにおいて異なる高さの圧力を調整することが可能であり、吸入室１６の圧力は典型的に、排出室１９の圧力よりも高い。それによって、一方でキャビテーションの泡の発生を妨げることができ、他方で排出室１９において、あってはならない圧力上昇が生じるのを回避することができる。   Different pressures can be adjusted in the suction chamber 16 and the discharge chamber 19, and the pressure in the suction chamber 16 is typically higher than the pressure in the discharge chamber 19. Thereby, on the one hand, the generation of cavitation bubbles can be prevented, and on the other hand, in the discharge chamber 19 it is possible to avoid a pressure increase which should not be caused.

それぞれの吸入孔１８とそれぞれの排出孔２２との間の軸方向の距離は、一方でピストン１０の制御エッジ１３，１４を介して規定される最大有効ストロークを得ることができ、他方でそれぞれの吸入孔１８とそれぞれの排出孔２２との間の仕切り壁２３が、調節される圧力負荷に耐えるように、算定される。   The axial distance between each suction hole 18 and each discharge hole 22 can on the one hand obtain the maximum effective stroke defined via the control edges 13, 14 of the piston 10, on the other hand The partition walls 23 between the suction holes 18 and the respective discharge holes 22 are calculated so as to withstand the regulated pressure load.

１０ ピストン
１１ ポンプシリンダー
１２ カム
１３ 給送開始制御エッジ
１４ 給送終了制御エッジ
１５ ポンプハウジング
１６ 吸入室
１７ 高圧室
１８ 吸入孔
１９ 排出室
２０ 仕切り壁
２１ 導管
２２ 排出孔
２３ 仕切り壁
２４ 排出溝 DESCRIPTION OF SYMBOLS 10 Piston 11 Pump cylinder 12 Cam 13 Feed start control edge 14 Feed end control edge 15 Pump housing 16 Suction chamber 17 High pressure chamber 18 Suction hole 19 Discharge chamber 20 Partition wall 21 Conduit 22 Discharge hole 23 Partition wall 24 Discharge groove

Claims (6)

少なくとも１つのピストンを有する、内燃機関のための燃料ポンプであって、少なくとも１つの吸入孔を介して互いに連通可能な吸入室と高圧室とは前記それぞれのピストンと協働しており、前記それぞれのピストンが、前記それぞれの吸入孔を塞いで前記吸入室から前記高圧室への燃料流入を妨げるか、あるいは前記それぞれの吸入孔を開放して前記吸入室からの燃料で前記高圧室が満たされるのを可能にしている燃料ポンプにおいて、
前記吸入室（１６）から分離された排出室（１９）であって、少なくとも１つの排出溝（２４）と少なくとも１つの排出孔（２２）とを介して、前記高圧室（１７）と連通可能になっており、前記それぞれのピストン（１０）が、前記それぞれの吸入孔（１８）を開放して前記吸入室（１６）から前記高圧室へ燃料が流入するのを可能にするか、あるいは前記それぞれの排出孔（２２）を開放して前記高圧室（１７）から前記排出室（１９）へ燃料が流出するのを可能にしている排出室（１９）によって特徴付けられる燃料ポンプ。 A fuel pump for an internal combustion engine having at least one piston, wherein a suction chamber and a high-pressure chamber, which can communicate with each other via at least one suction hole, cooperate with the respective pistons, The piston closes the respective suction holes to prevent the fuel from flowing from the suction chamber to the high pressure chamber, or opens the respective suction holes to fill the high pressure chamber with fuel from the suction chamber. In the fuel pump that enables
A discharge chamber (19) separated from the suction chamber (16), which can communicate with the high-pressure chamber (17) via at least one discharge groove (24) and at least one discharge hole (22). The respective pistons (10) open the respective suction holes (18) to allow fuel to flow from the suction chamber (16) into the high pressure chamber, or A fuel pump characterized by a discharge chamber (19) opening each discharge hole (22) to allow fuel to flow from the high pressure chamber (17) to the discharge chamber (19). 前記吸入室（１６）と前記排出室（１９）とが、前記ピストン（１０）の軸方向に互いに平行移動した関係で設けられ、仕切り壁（２０）によって互いに分離されていることを特徴とする請求項１に記載の燃料ポンプ。   The suction chamber (16) and the discharge chamber (19) are provided so as to be parallel to each other in the axial direction of the piston (10), and are separated from each other by a partition wall (20). The fuel pump according to claim 1. 前記吸入室（１６）と前記排出室（１９）とにおいて、異なる高さの圧力が調整可能であることを特徴とする請求項１あるいは請求項２に記載の燃料ポンプ。   3. The fuel pump according to claim 1, wherein pressures of different heights are adjustable in the suction chamber (16) and the discharge chamber (19). 前記それぞれの吸入孔（１８）と前記それぞれの排出孔（２２）とが、前記ピストン（１０）の軸方向に互いに平行移動した関係で設けられ、仕切り壁（２３）によって互いに分離されていることを特徴とする請求項１から請求項３のいずれか一項に記載の燃料ポンプ。   The respective suction holes (18) and the respective discharge holes (22) are provided so as to be translated from each other in the axial direction of the piston (10), and are separated from each other by a partition wall (23). The fuel pump according to any one of claims 1 to 3, wherein: 前記吸入室（１６）が前記それぞれの吸入孔（１８）を介して前記高圧室（１７）と連通可能であり、かつ前記排出室（１９）が前記それぞれの排出溝（２４）と前記それぞれの排出孔（２２）とを介して前記高圧室（１７）と連通可能であって、前記吸入室（１６）か前記排出室（１９）のどちらかが前記高圧室（１７）と連通されており、前記吸入室（１６）と前記排出室（１９）とが同時に前記高圧室（１７）と連通されることは決してないことを特徴とする請求項１から請求項４のいずれか一項に記載の燃料ポンプ。   The suction chamber (16) can communicate with the high-pressure chamber (17) via the respective suction holes (18), and the discharge chamber (19) is connected to the respective discharge grooves (24) and the respective The high-pressure chamber (17) can communicate with the high-pressure chamber (17) through a discharge hole (22), and either the suction chamber (16) or the discharge chamber (19) is in communication with the high-pressure chamber (17). 5. The suction chamber (16) and the discharge chamber (19) are never in communication with the high-pressure chamber (17) at the same time, according to any one of claims 1 to 4. Fuel pump. 前記それぞれの吸入孔（１８）と前記それぞれの排出孔（２２）との間の軸方向の距離は、一方で前記ピストン（１０）の制御エッジ（１３，１４）を介して規定される有効ストロークを得ることができ、他方で前記それぞれの吸入孔（１８）と前記それぞれの排出孔（２２）との間の前記仕切り壁（２３）が、調節される圧力負荷に耐えるように算定されることを特徴とする請求項４あるいは請求項５に記載の燃料ポンプ。   The axial distance between the respective suction holes (18) and the respective discharge holes (22) is, on the one hand, the effective stroke defined via the control edges (13, 14) of the piston (10). While the partition wall (23) between the respective suction hole (18) and the respective discharge hole (22) is calculated to withstand the regulated pressure load. 6. The fuel pump according to claim 4 or 5, wherein:
JP2009066375A 2008-03-26 2009-03-18 Fuel pump for internal combustion engine Withdrawn JP2009236114A (en)

Applications Claiming Priority (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109253004A (en) * 2018-11-15 2019-01-22 珠海安瑾动力科技有限公司 A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757527C (en) * 1939-01-10 1954-03-01 Bosch Gmbh Robert Fuel supply system for an internal combustion engine
CH390619A (en) * 1962-02-01 1965-04-15 Sulzer Ag Fuel injection pump for internal combustion engines
CH546341A (en) * 1971-11-11 1974-02-28 Sulzer Ag FUEL INJECTION PUMP OF A DIESEL ENGINE.
FR2278951A1 (en) * 1974-07-16 1976-02-13 Semt ANTI-EROSION DEVICE OF A SUCTION AND PRESSURE PUMP

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109253004A (en) * 2018-11-15 2019-01-22 珠海安瑾动力科技有限公司 A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly

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DE102008015612A1 (en) 2009-10-01
FI20095250A (en) 2009-09-27

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