JP2008121665A - Fuel supply device and high pressure fuel piping for large-sized diesel engine - Google Patents

Fuel supply device and high pressure fuel piping for large-sized diesel engine Download PDF

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Publication number
JP2008121665A
JP2008121665A JP2007284752A JP2007284752A JP2008121665A JP 2008121665 A JP2008121665 A JP 2008121665A JP 2007284752 A JP2007284752 A JP 2007284752A JP 2007284752 A JP2007284752 A JP 2007284752A JP 2008121665 A JP2008121665 A JP 2008121665A
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pressure
fuel
supply device
fuel supply
high pressure
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Andreas Stichnoth
シュティッヒノート アンドレアス
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MAN Energy Solutions France SAS
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MAN Diesel SA
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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps

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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 shorten a straight terminating part of high pressure piping in a fuel supply device for a large-sized diesel engine equipped with a low pressure region of the fuel supply device and a pump device including at least one high pressure pump for carrying fuel from the low pressure region to a high pressure region of the fuel supply device, wherein high pressure fuel piping extends in the high pressure region between the pump device and a fuel injector added to a cylinder, and at least one curved high pressure fuel piping can be connected to the structural body of the high pressure fuel piping with a connecting member formed at straight terminating ends at both ends thereof through a cylindrical fastening screw having a hollow for passing the high pressure fuel piping, and a male screw at one end. <P>SOLUTION: The hollow (15) of the cylindrical fastening screw (14) of the curved high pressure fuel piping (10) has a spreading part (19) at an end (18) on the opposite side of an end (16) having the male screw (17). Thereby, the straight terminating part of the high pressure piping can be shortened, and a spacial problem can be solved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、請求項１の前文に記載の大形ディーゼルエンジンの燃料供給装置に関する。本発明はまた、請求項５の前文に記載の燃料供給装置の高圧燃料配管にも関する。   The present invention relates to a fuel supply device for a large diesel engine according to the preamble of claim 1. The invention also relates to a high-pressure fuel line for a fuel supply device according to the preamble of claim 5.

特許文献１に、大形ディーゼルエンジン、即ち船舶用多気筒ディーゼルエンジンが開示されている。その各シリンダに、コモンレール式燃料噴射装置として形成された燃料供給装置の燃料噴射器が付属している。内燃機関の各シリンダに各々燃料噴射器を介して燃料が噴射される。コモンレール式燃料噴射装置は、コモンレール式燃料噴射装置の低圧領域から高圧領域に燃料を搬送すべく、複数の高圧ポンプを含むポンプ装置を有している。ポンプ装置と燃料噴射器との間の高圧領域には、常時高圧状態にある蓄圧系が設けられている。常時高圧状態にあり、コモンレールとも呼ばれるこの蓄圧系は、特許文献１では、複数の蓄圧室を有し、同様に常時高圧状態にある高圧燃料配管を介してポンプ装置に接続されている。更に、蓄圧系は、燃料噴射サイクルに関係して一時的に高圧状態になる高圧燃料配管を介して、燃料噴射器に接続されている。   Patent Document 1 discloses a large diesel engine, that is, a marine multi-cylinder diesel engine. A fuel injector of a fuel supply device formed as a common rail fuel injection device is attached to each cylinder. Fuel is injected into each cylinder of the internal combustion engine via a fuel injector. The common rail fuel injection device has a pump device including a plurality of high pressure pumps in order to transport fuel from the low pressure region to the high pressure region of the common rail fuel injection device. In the high pressure region between the pump device and the fuel injector, a pressure accumulating system that is always in a high pressure state is provided. This pressure accumulating system, which is always in a high pressure state and is also called a common rail, has a plurality of pressure accumulating chambers in Patent Document 1, and is connected to a pump device through a high pressure fuel pipe that is also always in a high pressure state. Furthermore, the pressure accumulating system is connected to the fuel injector via a high-pressure fuel pipe that temporarily becomes in a high-pressure state in relation to the fuel injection cycle.

特許文献２で、大形ディーゼルエンジンのコモンレール式燃料噴射装置ないし大形ディーゼルエンジンの通常の燃料供給装置に採用される高圧燃料配管が公知である。   Patent Document 2 discloses a high-pressure fuel pipe employed in a common rail fuel injection device for a large diesel engine or a normal fuel supply device for a large diesel engine.

特許文献２の高圧燃料配管は湾曲した輪郭を有し、高圧燃料配管の両端の直線終端部に各々接続ヘッドないし接続部材が形成されている。高圧燃料配管はその接続部材が、円筒体として形成された筒形締付けねじを介して、燃料供給装置の構成体、例えば燃料ポンプ又は燃料弁に取り付けられる。円筒体として形成された筒形締付けねじは、高圧燃料配管の終端部が通される空洞を備える。その円筒体は片側端に、高圧燃料配管と燃料供給装置の構成体とのねじ継手を形成すべく雄ねじを有している。   The high-pressure fuel pipe of Patent Document 2 has a curved contour, and a connection head or a connection member is formed at each of straight end portions at both ends of the high-pressure fuel pipe. The connecting member of the high-pressure fuel pipe is attached to a component of the fuel supply device, for example, a fuel pump or a fuel valve, via a cylindrical clamping screw formed as a cylindrical body. A cylindrical clamping screw formed as a cylindrical body includes a cavity through which a terminal portion of a high-pressure fuel pipe is passed. The cylindrical body has a male thread at one end so as to form a threaded joint between the high-pressure fuel pipe and the fuel supply device.

高圧燃料配管を燃料供給装置の構成体に組立並びに分解すべく、筒形締付けねじは高圧燃料配管の各接続部材に対し相対移動できねばならず、かくして、例えば接続部材を燃料供給装置の構成体の対応したシール座にきっちりはめ込み、又はそこから引き抜くことができる。そのため高圧燃料配管の直線的終端部は、筒形締付けねじと接続部材との十分な相対変位を可能にするために最低長さを有している。しかし、高圧燃料配管の狭い場所的状況のため、高圧燃料配管の直線的終端部に対し最低長さの確保が困難であり、この直線的終端部が短縮すると、筒形締付けねじと接続部材の十分な相対変位性を保証できない。
独国特許出願公告第１０１５７１３５号明細書 独国特許第３７３９９３７号明細書 In order to assemble and disassemble the high-pressure fuel pipe into the fuel supply device component, the cylindrical clamping screw must be able to move relative to each connection member of the high-pressure fuel pipe, and thus, for example, connect the connection member to the fuel supply device component Can be fitted in or pulled out of the corresponding seal seat. Therefore, the straight end of the high-pressure fuel pipe has a minimum length to allow sufficient relative displacement between the cylindrical clamping screw and the connecting member. However, due to the narrow location of the high-pressure fuel pipe, it is difficult to ensure the minimum length for the straight end of the high-pressure fuel pipe. If this straight end is shortened, the cylindrical clamping screw and connecting member Sufficient relative displacement cannot be guaranteed.
German Patent Application Publication No. 10157135 German Patent No. 3739937

本発明の課題は、上述の問題に鑑み、大形ディーゼルエンジンの新たな燃料供給装置並びにその新たな高圧燃料配管を提供することにある。   In view of the above problems, an object of the present invention is to provide a new fuel supply device for a large diesel engine and a new high-pressure fuel pipe thereof.

この課題は請求項１に記載の燃料供給装置によって解決される。本発明に基づき、湾曲高圧燃料配管の一端或いは両端における筒形締付けねじの空洞は、その雄ねじを有する端部とは反対側の端部に広がり部を備える。   This problem is solved by the fuel supply device according to claim 1. According to the present invention, the cavity of the cylindrical clamping screw at one or both ends of the curved high-pressure fuel pipe has a widened portion at the end opposite to the end having the male screw.

本発明に従い、直線的終端部が通される筒形締付けねじの空洞は、筒形締付けねじの雄ねじ付き端部とは反対側の端部に広がり部を有する。この結果、筒形締付けねじを、該ねじが高圧燃料配管の直線的端部に続く湾曲管部分の上に少なくとも部分的に被さるように変位させ得る。この結果、本発明に基づく燃料供給装置の高圧燃料配管の筒形締付けねじは、従来公知の筒形締付けねじと異なり、高圧燃料配管の湾曲部で変位可能である。このため、高圧燃料配管の直線的端部を短く形成して場所的問題を解消できる。 In accordance with the present invention, the cavity of the cylindrical clamping screw through which the linear termination is passed has an extension at the end opposite the male threaded end of the cylindrical clamping screw. As a result, the cylindrical clamping screw can be displaced so that the screw at least partially covers the curved tube portion that follows the straight end of the high pressure fuel piping. As a result, the cylindrical clamping screw of the high-pressure fuel pipe of the fuel supply apparatus according to the present invention can be displaced at the curved portion of the high-pressure fuel pipe, unlike the conventionally known cylindrical clamping screw. For this reason, the linear problem of a high-pressure fuel piping can be formed short, and a local problem can be eliminated.

本発明では、筒形締付けねじの空洞の広がり部を裁頭円錐状に輪郭付けるとよい。   In this invention, it is good to outline the expansion part of the cavity of a cylindrical clamping screw in the shape of a truncated cone.

本発明に基づく高圧燃料配管は請求項５に規定している。   The high-pressure fuel pipe according to the invention is defined in claim 5.

本発明の有利な実施態様を、従属請求項および以下の説明から明らかにする。以下図を参照して本発明の実施例を詳細に説明するが、本発明はこの実施例に限定されない。   Advantageous embodiments of the invention emerge from the dependent claims and the following description. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiments.

本発明は、大形ディーゼルエンジン、特に船舶用ディーゼルエンジンの燃料供給装置に関する。かかる燃料供給装置は低圧領域と高圧領域を有し、少なくとも１台の高圧ポンプを有するポンプ装置を経て、燃料が燃料供給装置の低圧領域から高圧領域に搬送される。燃料供給装置の高圧領域には、ポンプ装置と大形ディーゼルエンジンのシリンダに付設された燃料噴射器との間を高圧燃料配管が延び、かかる高圧燃料配管は、通常、湾曲した輪郭を有している。   The present invention relates to a fuel supply device for a large diesel engine, particularly a marine diesel engine. Such a fuel supply device has a low pressure region and a high pressure region, and the fuel is conveyed from the low pressure region of the fuel supply device to the high pressure region via a pump device having at least one high pressure pump. In the high-pressure region of the fuel supply device, a high-pressure fuel pipe extends between a pump device and a fuel injector attached to a cylinder of a large diesel engine. The high-pressure fuel pipe usually has a curved contour. Yes.

燃料供給装置を通常の燃料供給装置として形成する場合、高圧燃料配管はポンプ装置とシリンダの燃料噴射器との間を延びる。これに対し燃料供給装置をコモンレール式燃料噴射装置として形成する場合、ポンプ装置とシリンダの燃料噴射器との間の高圧領域に、少なくとも１個の蓄圧室を有する常時高圧状態にある蓄圧系を設け、該蓄圧系を、少なくとも１本の高圧燃料配管を介してポンプ装置に接続し、他の高圧燃料配管を介してシリンダの燃料噴射器に接続する。   When the fuel supply device is formed as a normal fuel supply device, the high-pressure fuel pipe extends between the pump device and the fuel injector of the cylinder. On the other hand, when the fuel supply device is formed as a common rail type fuel injection device, a pressure accumulation system that is always in a high pressure state having at least one pressure accumulation chamber is provided in the high pressure region between the pump device and the fuel injector of the cylinder. The pressure accumulating system is connected to the pump device via at least one high-pressure fuel pipe, and connected to the cylinder fuel injector via another high-pressure fuel pipe.

図１は、本発明に基づく燃料供給装置の高圧燃料配管１０を断面図で概略的に示す。この高圧燃料配管１０は、両端に各々接続部材１１を備える。高圧燃料配管１０は組立状態では、図１に示す接続部材１１を経て、燃料供給装置の構成体のシール座にきっちりはめ込まれ、高圧燃料配管１０の端部は、燃料供給装置に接続部材１１で結合される。   FIG. 1 schematically shows a cross-sectional view of a high-pressure fuel pipe 10 of a fuel supply apparatus according to the present invention. The high-pressure fuel pipe 10 includes connecting members 11 at both ends. In the assembled state, the high-pressure fuel pipe 10 is fitted into the seal seat of the constituent body of the fuel supply apparatus through the connection member 11 shown in FIG. 1, and the end of the high-pressure fuel pipe 10 is connected to the fuel supply apparatus by the connection member 11. Combined.

図１において、接続部材１１は高圧燃料配管１０の直線的端部１２に形成され、この直線的端部１２に、高圧燃料配管１０の湾曲管部分１３が続いている。   In FIG. 1, the connecting member 11 is formed at the straight end 12 of the high-pressure fuel pipe 10, and the curved end 13 of the high-pressure fuel pipe 10 continues to the straight end 12.

既述のように、高圧燃料配管１０は組立状態において接続部材１１で燃料供給装置の構成体のシール座にきっちりはめ込まれ、その際、接続部材１１は筒形締付けねじ１４を介して対応したシール座に固定され、シール座に押し付けられる。図１において、筒形締付けねじ１４は、高圧燃料配管１０の直線的端部が通される空洞１５を備える。筒形締付けねじ１４はその一端１６に雄ねじ１７を有し、組立状態では、該雄ねじ１７は構成体の雌ねじにねじ込まれ、接続部材１１がその構成体のシール座にきっちりはめ込まれる。   As described above, in the assembled state, the high-pressure fuel pipe 10 is fitted into the seal seat of the component of the fuel supply apparatus by the connecting member 11, and at this time, the connecting member 11 is connected to the corresponding seal via the cylindrical clamping screw 14. It is fixed to the seat and pressed against the seal seat. In FIG. 1, a cylindrical clamping screw 14 includes a cavity 15 through which a straight end of a high-pressure fuel pipe 10 is passed. The cylindrical clamping screw 14 has a male screw 17 at one end 16 thereof. In the assembled state, the male screw 17 is screwed into the female screw of the component, and the connecting member 11 is fitted into the seal seat of the component.

本発明に従い、高圧燃料配管１０の直線的端部１２が通される筒形締付けねじ１４の空洞１５は、筒形締付けねじ１４の雄ねじ付き端１６と反対側の端部１８に広がり部１９を備える。図１において空洞１５の広がり部１９は空洞１５の内径を連続して増大し、詳しくは、雄ねじ１７を有する端部１６と反対側の筒形締付けねじ１４の端部１８の方向に向かって増大している。広がり部１９は、好適には裁頭円錐状の輪郭を有する。   In accordance with the present invention, the cavity 15 of the cylindrical clamping screw 14 through which the straight end 12 of the high-pressure fuel pipe 10 is passed has a widened portion 19 at the end 18 opposite to the male threaded end 16 of the cylindrical clamping screw 14. Prepare. In FIG. 1, the expanding portion 19 of the cavity 15 continuously increases the inner diameter of the cavity 15, and in particular, increases toward the end 18 of the cylindrical clamping screw 14 opposite to the end 16 having the male screw 17. is doing. The spreading part 19 preferably has a frustoconical contour.

空洞１５が筒形締付けねじ１４の端部１８の領域に広がり部１９を有することで、筒形締付けねじ１４は、該ねじ１４が高圧燃料配管１０の湾曲管部分１３を少なくとも部分的に取り囲むように変位させ得る。筒形締付けねじ１４が取り囲む湾曲管部分１３の長さだけ、高圧燃料配管１０の直線的端部１２は短縮できる。   The cavity 15 has a broadening 19 in the region of the end 18 of the cylindrical clamping screw 14 so that the cylindrical clamping screw 14 at least partially surrounds the curved tube portion 13 of the high-pressure fuel pipe 10. Can be displaced. The straight end 12 of the high-pressure fuel pipe 10 can be shortened by the length of the curved pipe portion 13 surrounded by the cylindrical clamping screw 14.

この結果、燃料供給装置に使用可能な構造空間を最良に利用でき、高圧燃料配管の組立ないし分解における場所的問題を解消できる。   As a result, the structural space that can be used for the fuel supply device can be best utilized, and the problem of location in the assembly or disassembly of the high-pressure fuel pipe can be solved.

本発明に基づく燃料供給装置の高圧燃料配管の部分断面図。The fragmentary sectional view of the high pressure fuel piping of the fuel supply apparatus based on this invention. 図１における部分Ａの拡大詳細図。FIG. 2 is an enlarged detail view of a portion A in FIG. 1.

符号の説明Explanation of symbols

１０ 高圧燃料配管、１１ 接続部材、１２ 終端部、１３ 湾曲管部分、１４ 筒形締付けねじ、１５ 空洞、１６ 筒形締付けねじの一端、１７ 雄ねじ、１８ 筒形締付けねじの他端 DESCRIPTION OF SYMBOLS 10 High pressure fuel piping, 11 Connection member, 12 Terminal part, 13 Curved pipe part, 14 Cylindrical clamping screw, 15 Cavity, 16 One end of cylindrical clamping screw, 17 Male screw, 18 Other end of cylindrical clamping screw

Claims (7)

燃料供給装置の低圧領域と、該低圧領域から燃料を燃料供給装置の高圧領域に搬送するために少なくとも１台の高圧ポンプを含むポンプ装置とを備え、ポンプ装置とシリンダに付設された燃料噴射器との間の高圧領域内に高圧燃料配管が延び、少なくとも１本の湾曲高圧燃料配管が、その両端における直線的終端部に形成された接続部材で、高圧燃料配管を通すための空洞と片側端における雄ねじとを有する筒形締付けねじを介して、燃料供給装置の構成体に接続される大形ディーゼルエンジンの燃料供給装置において、
湾曲高圧燃料配管（１０）の筒形締付けねじ（１４）の空洞（１５）が、その雄ねじ（１７）付き端部（１６）とは反対側の端部（１８）に広がり部（１９）を有することを特徴とする大形ディーゼルエンジンの燃料供給装置。 A fuel injector provided with a low-pressure region of the fuel supply device and a pump device including at least one high-pressure pump for transporting fuel from the low-pressure region to the high-pressure region of the fuel supply device. A high-pressure fuel pipe extends into the high-pressure region between the two ends, and at least one curved high-pressure fuel pipe is a connecting member formed at a straight end portion at both ends of the high-pressure fuel pipe. In a fuel supply device for a large diesel engine connected to a component of the fuel supply device via a cylindrical fastening screw having a male screw in
The hollow (15) of the cylindrical clamping screw (14) of the curved high-pressure fuel pipe (10) has a widened portion (19) at the end (18) opposite to the end (16) with the male screw (17). A fuel supply apparatus for a large diesel engine, comprising: 空洞（１５）の広がり部（１９）によって、筒形締付けねじ（１２）の空洞（１５）の内径が、その雄ねじ（１７）付き端部（１６）とは反対側の端部（１８）の方向に連続して増大することを特徴とする請求項１記載の燃料供給装置。   Due to the expansive part (19) of the cavity (15), the inner diameter of the cavity (15) of the cylindrical clamping screw (12) is at the end (18) opposite the end (16) with its male thread (17). 2. The fuel supply device according to claim 1, wherein the fuel supply device continuously increases in the direction. 広がり部（１９）が裁頭円錐状に輪郭づけられたことを特徴とする請求項１又は２記載の燃料供給装置。   3. The fuel supply device according to claim 1, wherein the widened portion (19) is contoured in a truncated cone shape. 燃料供給装置がコモンレール式燃料噴射装置として形成され、ポンプ装置とシリンダに付設された燃料噴射器との間の高圧領域に、少なくとも１個の蓄圧室を有し、常時高圧状態にある蓄圧系が設けられ、該蓄圧系が、常時高圧状態にある少なくとも１本の高圧燃料配管を介してポンプ装置に接続され、前記蓄圧系が、燃料噴射サイクルに関係して一時的に高圧状態になる高圧燃料配管を介して燃料噴射器に接続されたことを特徴とする請求項１から３の１つに記載の燃料供給装置。   The fuel supply device is formed as a common rail fuel injection device, and has a pressure accumulation system that has at least one pressure accumulation chamber in a high pressure region between the pump device and the fuel injector attached to the cylinder, and is always in a high pressure state. A high-pressure fuel that is provided and connected to a pump device via at least one high-pressure fuel pipe that is always in a high-pressure state, and the pressure-accumulation system temporarily enters a high-pressure state in relation to a fuel injection cycle 4. The fuel supply device according to claim 1, wherein the fuel supply device is connected to a fuel injector via a pipe. 湾曲した輪郭を有する高圧燃料配管が、その直線的終端部に形成された接続部材で、高圧燃料配管を通すための空洞と、片側端の雄ねじを有する筒形締付けねじを経て燃料供給装置の構成体に接続される大形ディーゼルエンジンの燃料供給装置の高圧燃料配管において、
筒形締付けねじ（１４）の空洞（１５）が、その雄ねじ（１７）付き端部（１６）とは反対側の端部（１８）に広がり部（１９）を有することを特徴とする大形ディーゼルエンジンの燃料供給装置の高圧燃料配管。 A high pressure fuel pipe having a curved contour is a connecting member formed at a linear end portion of the fuel supply apparatus through a hollow for passing the high pressure fuel pipe and a cylindrical clamping screw having a male screw at one end. In the high-pressure fuel piping of the fuel supply device of a large diesel engine connected to the body,
Large size, characterized in that the cavity (15) of the cylindrical clamping screw (14) has a flared portion (19) at the end (18) opposite the end (16) with its male thread (17). High pressure fuel piping for diesel engine fuel supply equipment. 空洞（１５）の広がり部（１９）によって、筒形締付けねじ（１２）の空洞（１５）の内径が、その雄ねじ（１７）付き端部（１６）とは反対側の端部（１８）の方向に連続して増大することを特徴とする請求項５記載の高圧燃料配管。   Due to the expansive part (19) of the cavity (15), the inner diameter of the cavity (15) of the cylindrical clamping screw (12) is at the end (18) opposite the end (16) with its male thread (17). 6. The high-pressure fuel pipe according to claim 5, wherein the high-pressure fuel pipe increases continuously in the direction. 広がり部（１９）が裁頭円錐状に輪郭づけられた請求項５又は６記載の高圧燃料配管。   The high-pressure fuel pipe according to claim 5 or 6, wherein the widened portion (19) is contoured in a truncated cone shape.
JP2007284752A 2006-11-10 2007-11-01 Fuel supply device and high pressure fuel piping for large-sized diesel engine Abandoned JP2008121665A (en)

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DE102006053028A DE102006053028A1 (en) 2006-11-10 2006-11-10 Fuel supply system i.e. common rail fuel supply system for ship-diesel internal-combustion engine, has recess of pressure screws of curved fuel pipe exhibiting expansion at end, which is opposite to end having external thread

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US9523335B2 (en) 2012-05-30 2016-12-20 Caterpillar Motoren Gmbh & Co. Kg Plunger for an internal combustion engine fuel pump

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DE4319269C2 (en) * 1993-06-09 1997-02-27 Juergen Dipl Ing Guido Injection line connection
DE19601496C2 (en) * 1996-01-17 1998-07-30 Man Nutzfahrzeuge Ag Connection of an injection line to a pressure pipe of an injection valve
DE19716513C2 (en) * 1997-04-19 1999-02-11 Mtu Friedrichshafen Gmbh Fuel injection system for an internal combustion engine with a common rail
DE10157135B4 (en) * 2001-11-21 2004-03-11 Man B & W Diesel Ag Fuel supply system in the form of a common rail system of an internal combustion engine with several cylinders

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US9523335B2 (en) 2012-05-30 2016-12-20 Caterpillar Motoren Gmbh & Co. Kg Plunger for an internal combustion engine fuel pump

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