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JP2015025436A - Accumulator vessel - Google Patents

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Publication number
JP2015025436A
JP2015025436A JP2013156861A JP2013156861A JP2015025436A JP 2015025436 A JP2015025436 A JP 2015025436A JP 2013156861 A JP2013156861 A JP 2013156861A JP 2013156861 A JP2013156861 A JP 2013156861A JP 2015025436 A JP2015025436 A JP 2015025436A
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Prior art keywords
pressure
chamber
fuel
pressure accumulation
accumulation chamber
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Japanese (ja)
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純平 山本
Junpei Yamamoto
純平 山本
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Denso Corp
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Denso Corp
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Priority to JP2013156861A priority Critical patent/JP2015025436A/en
Priority to DE102014108235.4A priority patent/DE102014108235A1/en
Publication of JP2015025436A publication Critical patent/JP2015025436A/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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

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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

PROBLEM TO BE SOLVED: To provide an accumulator vessel 1 for accumulating a fuel in a high pressure state, capable of reducing pressure pulsation without increasing a volume of an accumulator.SOLUTION: An accumulator vessel 1 includes a first accumulator 2 for accumulating a fuel supplied to a combustion chamber of an internal combustion engine in a high pressure state, and a second accumulator 3 made of a material having elasticity lower than that of the first accumulator, and communicated with the first accumulator 2 to accumulate the fuel in a high pressure state. Thus the second accumulator 3 can be applied as a region of high damper effect, so that pressure pulsation can be reduced without increasing a volume of the accumulator as a whole.

Description

本発明は、燃料を高圧状態で蓄圧する蓄圧容器に関するものであり、圧力脈動を低減するために好適に利用することができる構造に係わる。   The present invention relates to a pressure accumulation container that accumulates fuel in a high pressure state, and relates to a structure that can be suitably used to reduce pressure pulsation.

従来から、内燃機関に燃料を供給する燃料供給装置では、燃料を高圧状態で蓄圧する蓄圧容器と、燃料を高圧化して蓄圧容器に向けて吐出する燃料供給ポンプと、蓄圧容器から燃料の供給を受けて内燃機関に燃料を噴射する複数の燃料噴射弁とを備えるものが周知である。そして、蓄圧容器では、燃料の噴射等に伴い蓄圧室で圧力脈動が発生するので、圧力脈動を低減するために様々な検討が行われている。   Conventionally, in a fuel supply device that supplies fuel to an internal combustion engine, an accumulator that accumulates fuel in a high-pressure state, a fuel supply pump that increases the pressure of the fuel and discharges the fuel toward the accumulator, and a fuel supply from the accumulator It is well known to have a plurality of fuel injection valves that receive and inject fuel into an internal combustion engine. And in a pressure accumulation container, since pressure pulsation generate | occur | produces in a pressure accumulation chamber with fuel injection etc., various examination is performed in order to reduce pressure pulsation.

ところで、蓄圧室の圧力脈動は、蓄圧室の容積を増大することにより低減することができるものの、蓄圧室の容積増大は、エンジンルームにおける蓄圧容器の占有体積が大きくなり、好ましくない。このため、蓄圧室の容積を増大することなく、圧力脈動を低減することができる構造が求められている。
なお、特許文献１には、蓄圧室が大小２つの蓄圧室に分かれ、２つの蓄圧室の間が逆止弁により開閉される構造が開示されている。しかし、特許文献１の構造によれば、圧力脈動を低減することができないと考えられる。 By the way, although the pressure pulsation of the pressure accumulating chamber can be reduced by increasing the volume of the pressure accumulating chamber, the increase in the volume of the pressure accumulating chamber is not preferable because the occupied volume of the pressure accumulating container in the engine room becomes large. For this reason, a structure capable of reducing pressure pulsation without increasing the volume of the pressure accumulating chamber is demanded.
Patent Document 1 discloses a structure in which the pressure accumulating chamber is divided into two large and small pressure accumulating chambers, and the space between the two pressure accumulating chambers is opened and closed by a check valve. However, according to the structure of Patent Document 1, it is considered that pressure pulsation cannot be reduced.

特開２０１１−０３３０３８号公報JP 2011-033038 A

本発明は、上記の問題点を解決するためになされたものであり、その目的は、燃料を高圧状態で蓄圧する蓄圧容器に関し、蓄圧室の容積を増大することなく圧力脈動を低減することができる構造を提供することにある。   The present invention has been made to solve the above-described problems, and an object of the present invention relates to a pressure accumulation container that accumulates fuel in a high pressure state, and can reduce pressure pulsation without increasing the volume of the pressure accumulation chamber. It is to provide a structure that can.

本願発明によれば、蓄圧容器は、内燃機関の燃焼室に供給される燃料を高圧状態で蓄圧する第１蓄圧室と、第１蓄圧室を形成する第１材料よりも弾性が低い第２材料で形成され、第１蓄圧室と連通して燃料を高圧状態で蓄圧する第２蓄圧室とを備える。
これにより、蓄圧室の一部である第２蓄圧室をダンパ効果が高い領域にすることができる。このため、蓄圧室の容積を増大することなく圧力脈動を低減することができる。 According to the present invention, the pressure accumulating container has a first pressure accumulating chamber for accumulating fuel supplied to the combustion chamber of the internal combustion engine in a high pressure state, and a second material having lower elasticity than the first material forming the first pressure accumulating chamber. And a second pressure accumulation chamber that communicates with the first pressure accumulation chamber and accumulates fuel in a high pressure state.
Thereby, the 2nd pressure accumulation chamber which is a part of pressure accumulation chamber can be made into a field with a high damper effect. For this reason, pressure pulsation can be reduced without increasing the volume of the pressure accumulating chamber.

蓄圧容器の全体構成図である（実施例）。It is a whole block diagram of a pressure accumulation container (Example).

以下、発明を実施するための形態を実施例に基づいて説明する。   Hereinafter, modes for carrying out the invention will be described based on examples.

〔実施例の構成〕
実施例の蓄圧容器１を、図面に基づいて説明する。
蓄圧容器１は、燃料を高圧状態で蓄圧するものであり、内燃機関（図示せず。）の燃焼室（図示せず。）に燃料を供給する燃料供給装置の１構成要素である。
燃料供給装置は、例えば、１００ＭＰａを超える高圧に燃料を加圧して燃焼室に供給するものであり、蓄圧容器１、燃料供給ポンプおよび燃料噴射弁（ともに図示せず。）等を備える。 [Configuration of Example]
The pressure accumulation container 1 of an Example is demonstrated based on drawing.
The pressure accumulating container 1 accumulates fuel in a high pressure state, and is one component of a fuel supply device that supplies fuel to a combustion chamber (not shown) of an internal combustion engine (not shown).
The fuel supply device pressurizes fuel to a high pressure exceeding 100 MPa and supplies the fuel to the combustion chamber, for example, and includes a pressure accumulating vessel 1, a fuel supply pump, a fuel injection valve (both not shown), and the like.

なお、燃料供給ポンプは、燃料タンク（図示せず。）から吸引した燃料を高圧化して蓄圧容器１に向けて吐出するものであり、燃料噴射弁は、内燃機関の気筒毎に搭載され、蓄圧容器１から燃料を供給されて燃焼室に噴射するものである。
以下、蓄圧容器１の構成を説明する。 The fuel supply pump increases the pressure of the fuel sucked from a fuel tank (not shown) and discharges the fuel toward the pressure accumulating container 1, and the fuel injection valve is mounted for each cylinder of the internal combustion engine. Fuel is supplied from the container 1 and injected into the combustion chamber.
Hereinafter, the structure of the pressure accumulation container 1 will be described.

蓄圧容器１は、以下に説明する第１蓄圧室２、第２蓄圧室３、流入側流路４および流出側流路５を備える。そして、蓄圧容器１は、第１蓄圧室２、流入側流路４および流出側流路５を有する容器本体６の長手方向一端に、第２蓄圧室３を形成する別部材７を固定することで設けられている。   The pressure accumulation container 1 includes a first pressure accumulation chamber 2, a second pressure accumulation chamber 3, an inflow side flow path 4, and an outflow side flow path 5 described below. And the pressure accumulation container 1 fixes the separate member 7 which forms the 2nd pressure accumulation chamber 3 to the longitudinal direction end of the container main body 6 which has the 1st pressure accumulation chamber 2, the inflow side flow path 4, and the outflow side flow path 5. Is provided.

第１蓄圧室２は、容器本体６と同軸であって容器本体６の長手方向に細長い円筒空間として設けられ、燃料供給ポンプから受け入れて燃料噴射弁に供給する燃料を高圧状態で蓄圧する空間として機能する。また、第１蓄圧室２は、長手方向の両端に設けられた装着穴８に開口する。ここで、長手方向一端の装着穴８には別部材７が装着され、長手方向他端の装着穴８には、例えば、第１蓄圧室２の燃料圧を検出する圧力センサや、第１蓄圧室２から燃料を逃す逃し弁が装着される。なお、容器本体６は、例えば、鉄を素材として設けられる。   The first pressure accumulating chamber 2 is provided as a cylindrical space that is coaxial with the container main body 6 and is elongated in the longitudinal direction of the container main body 6, and accumulates fuel received from the fuel supply pump and supplied to the fuel injection valve in a high pressure state. Function. Moreover, the 1st pressure accumulation chamber 2 opens to the attachment hole 8 provided in the both ends of the longitudinal direction. Here, another member 7 is mounted in the mounting hole 8 at one end in the longitudinal direction. For example, a pressure sensor for detecting the fuel pressure in the first pressure accumulating chamber 2 or a first pressure accumulation is mounted in the mounting hole 8 at the other end in the longitudinal direction. A relief valve for escaping fuel from the chamber 2 is installed. The container body 6 is provided with, for example, iron as a material.

第２蓄圧室３は、カップ状の別部材７を、例えば、ネジ締結により装着穴８に装着することで形成され、第１蓄圧室２と同軸をなして連通する。このため、第２蓄圧室３は、第１蓄圧室２と同様に、燃料供給ポンプから受け入れて燃料噴射弁に供給する燃料を高圧状態で蓄圧する空間として機能する。また、第２蓄圧室３は第１蓄圧室２よりも容積が大きい。   The second pressure accumulating chamber 3 is formed by mounting the cup-shaped separate member 7 in the mounting hole 8 by screw fastening, for example, and communicates coaxially with the first pressure accumulating chamber 2. For this reason, like the 1st pressure accumulation chamber 2, the 2nd pressure accumulation chamber 3 functions as a space which accumulates fuel received from the fuel supply pump and supplied to the fuel injection valve in a high pressure state. Further, the second pressure accumulation chamber 3 has a larger volume than the first pressure accumulation chamber 2.

ここで、別部材７は、容器本体６の素材よりも弾性が低い材料（例えば、β型Ｔｉ合金）を素材として設けられる。また、別部材７の素材として採用されるβ型Ｔｉ合金の弾性に関わる特性はヤング率、引張強さや弾性変形能等であり、例えば、ヤング率が４０ＧＰａであり、引張強さが１０００ＭＰａよりも大きく、弾性変形能が２．５％以下である。   Here, the separate member 7 is provided with a material (for example, a β-type Ti alloy) having lower elasticity than the material of the container body 6 as a material. Further, the properties relating to the elasticity of the β-type Ti alloy employed as the material of the separate member 7 are Young's modulus, tensile strength, elastic deformability, etc., for example, Young's modulus is 40 GPa, and tensile strength is higher than 1000 MPa. The elastic deformation capacity is 2.5% or less.

流入側流路４は、燃料供給ポンプから燃料を受け入れる流路であり、流出側流路５は、複数の燃料噴射弁に燃料を供給する流路であり、燃料噴射弁ごとに設けられる。そして、流入側流路４および全ての流出側流路５は、容器本体６に設けられて第１蓄圧室２に接続するとともに、第１蓄圧室２を介して第２蓄圧室３に連通する。また、流入側流路４および全ての流出側流路５は、第１蓄圧室２の長手方向に一端側に向って並んでおり、オリフィス９を介して第１蓄圧室２に接続する。   The inflow side flow path 4 is a flow path for receiving fuel from the fuel supply pump, and the outflow side flow path 5 is a flow path for supplying fuel to a plurality of fuel injection valves, and is provided for each fuel injection valve. The inflow side flow path 4 and all the outflow side flow paths 5 are provided in the container body 6 and connected to the first pressure accumulation chamber 2, and communicate with the second pressure accumulation chamber 3 through the first pressure accumulation chamber 2. . Further, the inflow side flow path 4 and all the outflow side flow paths 5 are arranged in the longitudinal direction of the first pressure accumulation chamber 2 toward one end side, and are connected to the first pressure accumulation chamber 2 through the orifice 9.

なお、容器本体６には、燃料供給ポンプの吐出側、およびそれぞれの燃料噴射弁の流入側に通じる配管を締結するための締結部１０が、第１蓄圧室２の長手方向に並んで設けられている。そして、流入側流路４および全ての流出側流路５は、締結部１０を貫通して外部に開口している。また、第１蓄圧室２の軸を挟んで締結部１０の反対側には、蓄圧容器１を取り付けるためのブラケット１１が設けられている。   The container body 6 is provided with a fastening portion 10 arranged in the longitudinal direction of the first pressure accumulating chamber 2 for fastening piping leading to the discharge side of the fuel supply pump and the inflow side of each fuel injection valve. ing. And the inflow side flow path 4 and all the outflow side flow paths 5 penetrate the fastening part 10, and are opened outside. Further, a bracket 11 for attaching the pressure accumulating container 1 is provided on the opposite side of the fastening portion 10 across the axis of the first pressure accumulating chamber 2.

〔実施例の効果〕
実施例の蓄圧容器１は、内燃機関の燃焼室に供給される燃料を高圧状態で蓄圧する第１蓄圧室２と、第１蓄圧室２を形成する材料よりも弾性が低い材料で形成され、第１蓄圧室２と連通して燃料を高圧状態で蓄圧する第２蓄圧室３とを備える。
これにより、第２蓄圧室３をダンパ効果が高い領域にすることができる。このため、蓄圧室全体の容積を増大することなく圧力脈動を低減することができる。
また、ダンパ効果が高い第２蓄圧室３の方が第１蓄圧室２よりも容積が大きいので、圧力脈動の抑制効果を高めることができる。 [Effects of Examples]
The pressure accumulation container 1 of the embodiment is formed of a first pressure accumulation chamber 2 that accumulates fuel supplied to the combustion chamber of the internal combustion engine in a high-pressure state, and a material that is less elastic than the material that forms the first pressure accumulation chamber 2, A second pressure accumulation chamber 3 is provided which communicates with the first pressure accumulation chamber 2 and accumulates fuel in a high pressure state.
Thereby, the 2nd accumulator 3 can be made into a field with a high damper effect. For this reason, pressure pulsation can be reduced without increasing the volume of the entire pressure accumulating chamber.
Moreover, since the volume of the 2nd pressure accumulation chamber 3 with a high damper effect is larger than the 1st pressure accumulation chamber 2, the suppression effect of a pressure pulsation can be heightened.

また、第２蓄圧室３は、流入側、流出側流路４、５が長手方向に並ぶ容器本体６の長手方向一端に別部材７を装着することで形成される。これにより、燃料噴射弁や燃料供給ポンプから伝わる燃料圧の変動は、第１蓄圧室２を介して第２蓄圧室３に伝わる。このため、第２蓄圧室３の燃料圧は、第１蓄圧室２の燃料圧に比べて燃料噴射弁や燃料供給ポンプから伝わる変動の影響を受けにくい。この結果、第２蓄圧室３の燃料圧を安定させて第２蓄圧室３のダンパ効果を高めることができる。   The second pressure accumulating chamber 3 is formed by attaching another member 7 to one end in the longitudinal direction of the container body 6 in which the inflow side and outflow side flow paths 4 and 5 are arranged in the longitudinal direction. Thereby, the fluctuation of the fuel pressure transmitted from the fuel injection valve or the fuel supply pump is transmitted to the second pressure accumulation chamber 3 via the first pressure accumulation chamber 2. For this reason, the fuel pressure in the second pressure accumulating chamber 3 is less susceptible to fluctuations transmitted from the fuel injection valve and the fuel supply pump than the fuel pressure in the first pressure accumulating chamber 2. As a result, the fuel pressure in the second pressure accumulation chamber 3 can be stabilized and the damper effect of the second pressure accumulation chamber 3 can be enhanced.

なお、従来の蓄圧容器は、容器本体６と同様の態様をとるものが多いので、流入側流路４および全ての流出側流路５を容器本体６の側に設けて第１蓄圧室２に接続させることで、従来の蓄圧容器の製造工程をさほど改変することなく、第２蓄圧室３を追加することができる。   Since many conventional pressure accumulating containers take the same form as the container main body 6, the inflow side flow path 4 and all the outflow side flow paths 5 are provided on the container main body 6 side in the first pressure accumulation chamber 2. By making the connection, the second pressure accumulating chamber 3 can be added without significantly modifying the manufacturing process of the conventional pressure accumulating container.

〔変形例〕
蓄圧容器１の態様は実施例に限定されず、種々の変形例を考えることができる。
例えば、実施例の蓄圧容器１は、容器本体６の長手方向一端に別部材７を装着することで形成されて、第１、第２蓄圧室２、３は同軸をなしていたが、例えば、容器本体６の長手方向中央で、第２蓄圧室３を第１蓄圧室２に接続させ、第１、第２蓄圧室２、３の軸を直交させてもよい。 [Modification]
The aspect of the pressure accumulating container 1 is not limited to the embodiment, and various modifications can be considered.
For example, the pressure accumulating container 1 of the embodiment is formed by attaching another member 7 to one end in the longitudinal direction of the container main body 6, and the first and second pressure accumulating chambers 2 and 3 are coaxial, The second pressure accumulation chamber 3 may be connected to the first pressure accumulation chamber 2 at the center of the container body 6 in the longitudinal direction, and the axes of the first and second pressure accumulation chambers 2 and 3 may be orthogonal to each other.

１ 蓄圧容器 ２ 第１蓄圧室 ３ 第２蓄圧室 ４ 流入側流路 ５ 流出側流路 DESCRIPTION OF SYMBOLS 1 Pressure accumulation container 2 1st pressure accumulation chamber 3 2nd pressure accumulation chamber 4 Inflow side flow path 5 Outflow side flow path

Claims (4)

内燃機関の燃焼室に供給される燃料を高圧状態で蓄圧する第１蓄圧室（２）と、
この第１蓄圧室（２）を形成する第１材料よりも弾性が低い第２材料で形成され、前記第１蓄圧室（２）と連通して燃料を高圧状態で蓄圧する第２蓄圧室（３）とを備える蓄圧容器（１）。 A first pressure accumulation chamber (2) for accumulating fuel supplied to the combustion chamber of the internal combustion engine in a high pressure state;
A second pressure accumulating chamber (2) that is formed of a second material having lower elasticity than the first material forming the first pressure accumulating chamber (2) and accumulates fuel in a high pressure state in communication with the first pressure accumulating chamber (2). 3) a pressure accumulating vessel (1). 請求項１に記載の蓄圧容器（１）において、
前記第２蓄圧室（３）は、前記第１蓄圧室（２）よりも容積が大きいことを特徴とする蓄圧容器（１）。 The pressure-accumulation container (1) according to claim 1,
The pressure accumulation container (1), wherein the second pressure accumulation chamber (3) has a larger volume than the first pressure accumulation chamber (2). 請求項１または請求項２に記載の蓄圧容器（１）において、
燃料を高圧化して吐出する燃料供給ポンプから燃料を受け入れる流入側流路（４）と、
前記内燃機関に燃料を噴射して供給する複数の燃料噴射弁に燃料を供給する複数の流出側流路（５）とを備え、
前記流入側流路（４）および全ての前記流出側流路（５）は、前記第１材料で形成されて前記第１蓄圧室（２）に接続するとともに、前記第１蓄圧室（２）を介して前記第２蓄圧室（３）に連通することを特徴とする蓄圧容器（１）。 In the pressure-accumulation container (1) according to claim 1 or 2,
An inflow channel (4) for receiving fuel from a fuel supply pump that discharges the fuel at a high pressure;
A plurality of outflow passages (5) for supplying fuel to a plurality of fuel injection valves for injecting and supplying fuel to the internal combustion engine;
The inflow side flow path (4) and all the outflow side flow paths (5) are formed of the first material and connected to the first pressure accumulation chamber (2), and the first pressure accumulation chamber (2). The pressure accumulating vessel (1) is characterized in that it communicates with the second pressure accumulating chamber (3). 請求項１ないし請求項３の内のいずれか１つに記載の蓄圧容器（１）において、
前記内燃機関に燃料を噴射して供給する複数の燃料噴射弁に燃料を供給する複数の流出側流路（５）を備え、
全ての前記流出側流路（５）は、前記第１材料で形成されて前記第１蓄圧室（２）の長手方向に並んで前記第１蓄圧室（２）に接続するとともに、前記第１蓄圧室（２）を介して前記第２蓄圧室（３）に連通し、
前記第２蓄圧室（３）は、前記第１蓄圧室（２）の長手方向の端で前記第１蓄圧室（２）と連通することを特徴とする蓄圧容器（１）。 In the pressure-accumulation container (1) according to any one of claims 1 to 3,
A plurality of outflow passages (5) for supplying fuel to a plurality of fuel injection valves for injecting and supplying fuel to the internal combustion engine;
All the outflow side flow paths (5) are formed of the first material and are connected to the first pressure accumulation chamber (2) side by side in the longitudinal direction of the first pressure accumulation chamber (2). Communicating with the second pressure accumulation chamber (3) via the pressure accumulation chamber (2);
The pressure accumulation container (1), wherein the second pressure accumulation chamber (3) communicates with the first pressure accumulation chamber (2) at a longitudinal end of the first pressure accumulation chamber (2).
JP2013156861A 2013-07-29 2013-07-29 Accumulator vessel Pending JP2015025436A (en)

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JPH0637558U (en) * 1992-10-15 1994-05-20 株式会社京浜精機製作所 Pulsating pressure attenuator in fuel system of fuel injector
JPH08284778A (en) * 1995-04-13 1996-10-29 Mitsubishi Motors Corp Fuel feeder
JPH09310661A (en) * 1996-05-20 1997-12-02 Denso Corp Fuel supply device for direct injection type gasoline engine
JP4226732B2 (en) * 1999-07-12 2009-02-18 株式会社オティックス Common rail
JP2003003926A (en) * 2001-06-25 2003-01-08 Piolax Inc Fuel delivery pipe with pulsation damper
JP2005530080A (en) * 2002-05-07 2005-10-06 シーメンス　アクチエンゲゼルシヤフト Fuel distribution piping for automotive fuel injection devices, especially for common rail systems
JP2005120982A (en) * 2003-10-20 2005-05-12 Otics Corp Delivery pipe
JP2006258066A (en) * 2005-03-18 2006-09-28 Aisin Seiki Co Ltd Fuel supply device for internal combustion engine
JP2007146725A (en) * 2005-11-25 2007-06-14 Denso Corp Common rail
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