JP2007064160A - Delivery pipe - Google Patents

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Publication number
JP2007064160A
JP2007064160A JP2005254337A JP2005254337A JP2007064160A JP 2007064160 A JP2007064160 A JP 2007064160A JP 2005254337 A JP2005254337 A JP 2005254337A JP 2005254337 A JP2005254337 A JP 2005254337A JP 2007064160 A JP2007064160 A JP 2007064160A
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Prior art keywords
pipe
damping member
delivery pipe
inner tube
tube
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Hideaki Ito
秀哲 伊藤
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a delivery pipe capable of reducing noise radiated from an inner pipe and an outer pipe. <P>SOLUTION: (1) The delivery pipe 10 includes the outer pipe 20 to which a plurality of injectors are attached, the inner pipe 30 arranged inside of the outer pipe 20 and provided with an open end 32, and an attenuation member 40 arranged between the outer pipe 20 and the inner pipe 30, touching the outer pipe 20 and the inner pipe 30 and attenuating deformation vibration of a wall of the inner tube 30. (2) The inner tube 30 is provided with a flat surface part 31, and the attenuation member 40 abuts on the flat surface part 31. (3) The attenuation member 40 is arranged on only part of a circumference direction of the inner pipe 30. (4) The outer pipe 20 is provided with a plurality of recess parts 22 and is provided with a communication passage 23 establishing communication between the injector and the delivery pipe in the recess part 22. The attenuation member 40 is arranged only in a section where the recess part 22 is provided in a longitudinal direction of the outer pipe 20. (5) The attenuation member 40 is a mesh member. (6) The attenuation member 40 is an elastic member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、自動車用エンジンのデリバリパイプに関する。   The present invention relates to an automobile engine delivery pipe.

多気筒エンジンにおいて安定した燃料噴射を得るためにデリバリパイプ内の燃圧脈動を低減させることが望ましい。特開２００２−３３９８３５号公報は、内管と外管の二重管構造にして燃圧脈動を低減したデリバリパイプを開示している。内管は、扁平パイプであり、内管の壁が燃圧脈動により変形振動することで、内管と外管との間の燃圧脈動を低減している。   In order to obtain stable fuel injection in a multi-cylinder engine, it is desirable to reduce fuel pressure pulsations in the delivery pipe. Japanese Patent Application Laid-Open No. 2002-339835 discloses a delivery pipe that has a double tube structure of an inner tube and an outer tube to reduce fuel pressure pulsation. The inner pipe is a flat pipe, and the wall pressure of the inner pipe is deformed and vibrated by the fuel pressure pulsation, thereby reducing the fuel pressure pulsation between the inner pipe and the outer pipe.

上記公報開示のデリバリパイプはつぎの問題を有する。
内管の壁が変形振動するため内管から音が出る。また、内管の振動が外管に伝わり外管からも音が出る。しかし、上記公報開示のデリバリパイプには、その対策が施されていない。そのため、内管と外管の振動に伴う放射音による騒音が発生するという問題がある。
特開２００２−３３９８３５号公報 特開平９−５３５４１号公報 The delivery pipe disclosed in the above publication has the following problems.
Sound comes out from the inner pipe because the wall of the inner pipe is deformed and vibrated. In addition, the vibration of the inner tube is transmitted to the outer tube, and sound is emitted from the outer tube. However, the delivery pipe disclosed in the above publication does not take such measures. Therefore, there is a problem that noise due to radiated sound accompanying vibration of the inner tube and the outer tube is generated.
JP 2002-339835 A JP-A-9-53541

本発明の目的は、内管と外管から放射される音を従来より低減できるデリバリパイプを提供することにある。   The objective of this invention is providing the delivery pipe which can reduce the sound radiated | emitted from an inner pipe and an outer pipe | tube conventionally.

上記目的を達成する本発明はつぎの通りである。
（１） 複数のインジェクタが取付けられる外管と、
前記外管の内側に配置され開放端を備える内管と、
前記外管と前記内管との間で前記外管と前記内管とに接触して配置され前記内管の壁の変形振動を減衰させる減衰部材と、
を有するデリバリパイプ。
（２） 前記内管は平面部を備えており、前記減衰部材は前記内管の平面部に接触している（１）記載のデリバリパイプ。
（３） 前記減衰部材は前記内管の周方向の一部のみに配置されている（２）記載のデリバリパイプ。
（４） 前記外管は該外管の長手方向に間隔をおいて内側に凹む複数の凹部を備えており該凹部に前記インジェクタとデリバリパイプとを連通する連通路が設けられており、
前記減衰部材は前記外管の長手方向で前記凹部が設けられている部位のみに配置されている、（１）記載のデリバリパイプ。
（５） 前記減衰部材はメッシュ部材である（１）記載のデリバリパイプ。
（６） 前記減衰部材は弾性部材である（１）記載のデリバリパイプ。 The present invention for achieving the above object is as follows.
(1) an outer tube to which a plurality of injectors are attached;
An inner tube disposed inside the outer tube and having an open end;
A damping member disposed between the outer tube and the inner tube in contact with the outer tube and the inner tube to attenuate deformation vibration of the wall of the inner tube;
Having a delivery pipe.
(2) The delivery pipe according to (1), wherein the inner pipe includes a flat portion, and the damping member is in contact with the flat portion of the inner pipe.
(3) The delivery pipe according to (2), wherein the damping member is disposed only in a part of the inner pipe in the circumferential direction.
(4) The outer pipe is provided with a plurality of recesses recessed inwardly at intervals in the longitudinal direction of the outer pipe, and a communication path for communicating the injector and the delivery pipe is provided in the recess.
The delivery pipe according to (1), wherein the damping member is disposed only in a portion where the concave portion is provided in the longitudinal direction of the outer tube.
(5) The delivery pipe according to (1), wherein the damping member is a mesh member.
(6) The delivery pipe according to (1), wherein the damping member is an elastic member.

上記（１）のデリバリパイプでは、内管を備えているので（二重管構造をとっているので）、内管の壁が変形振動することで外管と内管との間の燃圧脈動を低減できる。
また、内管の壁の変形振動を減衰させる減衰部材が設けられているので、減衰部材が設けられていない場合に比べて、早期に内管の壁の変形振動を止めることができる。その結果、減衰部材が設けられていない場合に比べて、内管と外管から放射される音を低減できる。
上記（２）のデリバリパイプでは、平面部が変形振動することで外管と内管との間の燃圧脈動を低減できる。
また、減衰部材が平面部に接触しているので、振幅が大きい部位の振動を減衰させることができる。
上記（３）のデリバリパイプでは、減衰部材が内管の全周にわたって配置されている場合に比べて、コスト削減できる。また、減衰部材が内管の全周にわたって配置されている場合に比べて、減衰部材が外管と内管との間を流れる燃料の流れに及ぼす影響を小さくできる。
上記（４）のデリバリパイプでは、減衰部材が外管の長手方向で凹部が設けられている部位のみに配置されているので、減衰部材が外管の長手方向の全体にわたって配置されている場合に比べて、コスト削減できる。また、減衰部材が外管の長手方向の全体にわたって配置されている場合に比べて、減衰部材が外管と内管との間を流れる燃料の流れに及ぼす影響を小さくできる。
上記（５）のデリバリパイプでは、減衰部材がメッシュ部材であるので、燃料は減衰部材が設けられている部分にも流れる。そのため、減衰部材が外管と内管との間を流れる燃料の流れに及ぼす影響は小さい。
上記（６）のデリバリパイプでは、減衰部材が弾性部材であるので、早期に内管の壁の変形振動を止めることができる。 Since the delivery pipe of (1) has an inner pipe (since it has a double pipe structure), the wall of the inner pipe undergoes deformation vibration to cause fuel pressure pulsation between the outer pipe and the inner pipe. Can be reduced.
Further, since the damping member that attenuates the deformation vibration of the inner pipe wall is provided, the deformation vibration of the inner pipe wall can be stopped earlier than in the case where the damping member is not provided. As a result, the sound radiated from the inner tube and the outer tube can be reduced as compared with the case where the attenuation member is not provided.
In the delivery pipe of the above (2), the fuel pressure pulsation between the outer pipe and the inner pipe can be reduced by the deformation of the plane portion.
In addition, since the damping member is in contact with the flat surface portion, it is possible to attenuate the vibration of a portion having a large amplitude.
In the delivery pipe of the above (3), the cost can be reduced as compared with the case where the damping member is arranged over the entire circumference of the inner pipe. Further, the influence of the damping member on the flow of fuel flowing between the outer pipe and the inner pipe can be reduced as compared with the case where the damping member is arranged over the entire circumference of the inner pipe.
In the delivery pipe of the above (4), since the damping member is disposed only in the portion where the concave portion is provided in the longitudinal direction of the outer tube, the damping member is disposed over the entire longitudinal direction of the outer tube. Compared to cost reduction. Further, the influence of the damping member on the flow of the fuel flowing between the outer tube and the inner tube can be reduced as compared with the case where the damping member is arranged over the entire length of the outer tube.
In the delivery pipe of the above (5), the damping member is a mesh member, so that the fuel flows also to the portion where the damping member is provided. For this reason, the influence of the damping member on the flow of fuel flowing between the outer tube and the inner tube is small.
In the delivery pipe of the above (6), since the damping member is an elastic member, deformation vibration of the wall of the inner pipe can be stopped at an early stage.

図１〜図４は、本発明実施例のデリバリパイプを示している。
本発明実施例のデリバリパイプ１０は、図１に示すように、複数の図示略のインジェクタが取付けられる外管２０と、外管２０の内側に配置され開放端３２を備える内管３０と、外管２０と内管３０との間で外管２０と内管３０とに接触して配置され内管３０の壁の変形振動を低減させる減衰部材４０と、を有する。デリバリパイプ１０は、外管２０と内管３０の２重管構造をもつ。 1 to 4 show a delivery pipe according to an embodiment of the present invention.
As shown in FIG. 1, the delivery pipe 10 according to the embodiment of the present invention includes an outer tube 20 to which a plurality of unillustrated injectors are attached, an inner tube 30 disposed inside the outer tube 20 and having an open end 32, and an outer tube 20. A damping member 40 disposed between the tube 20 and the inner tube 30 in contact with the outer tube 20 and the inner tube 30 to reduce deformation vibration of the wall of the inner tube 30; The delivery pipe 10 has a double pipe structure of an outer pipe 20 and an inner pipe 30.

外管２０は、内管３０との間に燃料通路を形成する。外管２０は、樹脂製または金属製である。外管２０は、二部品構成であってもよく、三部品以上の複数部品構成であってもよい（図４では、外管２０が二部品構成である場合を示している）。外管２０は、長手方向一端にコネクタ２１を有する。外管２０は、長手方向（デリバリパイプ１０の長手方向）に間隔をおいて気筒数だけの凹部２２が形成されている。
凹部２２は、図４に示すように、外管２０の壁の一部を外管２０の内側に凹まして形成される。凹部２２の最奥部にインジェクタとデリバリパイプ１０とを連通する連通路２３が設けられている。インジェクタは、凹部２２に設けられており、気筒噴射順で燃料を噴射する。燃料は、コネクタ２１から外管２０と内管３０との間に入り、連通路２３から出ていき各気筒のインジェクタから噴射される。 The outer pipe 20 forms a fuel passage with the inner pipe 30. The outer tube 20 is made of resin or metal. The outer pipe 20 may have a two-part configuration, or may have a three-part or more multi-part configuration (FIG. 4 shows a case where the outer pipe 20 has a two-part configuration). The outer tube 20 has a connector 21 at one end in the longitudinal direction. The outer tube 20 is formed with recesses 22 corresponding to the number of cylinders at intervals in the longitudinal direction (longitudinal direction of the delivery pipe 10).
As shown in FIG. 4, the recess 22 is formed by recessing a part of the wall of the outer tube 20 inside the outer tube 20. A communication passage 23 that communicates the injector and the delivery pipe 10 is provided in the innermost part of the recess 22. The injector is provided in the recess 22 and injects fuel in the order of cylinder injection. The fuel enters between the outer tube 20 and the inner tube 30 through the connector 21, exits the communication passage 23, and is injected from the injector of each cylinder.

内管３０は、図１に示すように、外管２０の長手方向と同方向に延びている。内管３０は、樹脂製または金属製である。内管３０は、内管３０の長手方向両端部またはその近傍のみで外管２０に固定して取付けられている。内管３０は、内管３０と外管２０がともに金属製の場合、たとえば、外管２０に溶接される。内管３０内は、外管２０と内管３０との間とは連通していない。内管３０は、図４に示すように、外管２０内で外管２０の中央から一側に片寄っている。
内管３０の板厚は、外管２０の板厚より薄い。内管３０は、扁平パイプであり、内管３０の長手方向と直交する方向に比較的容易に変位可能な平面部３１を２箇所備えている。平面部３１が変位することにより、外管２０と内管３０との間に生じる燃圧脈動を吸収できる。
内管３０の長手方向の少なくとも一端は、図３に示すように、大気に開放する、開放端３２とされている。開放端３２は、内管３０の端面の全体であってもよく、内管３０の端面の一部であってもよい。 As shown in FIG. 1, the inner tube 30 extends in the same direction as the longitudinal direction of the outer tube 20. The inner tube 30 is made of resin or metal. The inner tube 30 is fixedly attached to the outer tube 20 only at or near both ends in the longitudinal direction of the inner tube 30. When the inner tube 30 and the outer tube 20 are both made of metal, the inner tube 30 is welded to the outer tube 20, for example. The inner tube 30 is not in communication with the outer tube 20 and the inner tube 30. As shown in FIG. 4, the inner tube 30 is offset from the center of the outer tube 20 to one side in the outer tube 20.
The plate thickness of the inner tube 30 is thinner than the plate thickness of the outer tube 20. The inner tube 30 is a flat pipe and includes two flat portions 31 that can be displaced relatively easily in a direction orthogonal to the longitudinal direction of the inner tube 30. Displacement of the flat portion 31 can absorb fuel pressure pulsation generated between the outer tube 20 and the inner tube 30.
At least one end in the longitudinal direction of the inner tube 30 is an open end 32 that opens to the atmosphere as shown in FIG. The open end 32 may be the entire end surface of the inner tube 30 or a part of the end surface of the inner tube 30.

減衰部材４０は、図４に示すように、外管２０の内面と内管３０の外面とに接触している。
減衰部材４０は、たとえば、メッシュ部材、弾性変形可能な弾性部材等からなる。以下、本発明実施例では、減衰部材４０がメッシュ部材からなる場合を説明する。
減衰部材４０は、樹脂製または金属製である。減衰部材４０は、細かい網目状とされている。コネクタ２１から外管２０と内管３０との間に入った燃料は、減衰部材４０が配置されている部位を通過可能である。減衰部材４０は、外管２０の内面と内管３０の外面との少なくとも一方に固定して取付けられている。 As shown in FIG. 4, the damping member 40 is in contact with the inner surface of the outer tube 20 and the outer surface of the inner tube 30.
The damping member 40 is made of, for example, a mesh member or an elastic member that can be elastically deformed. Hereinafter, in the embodiment of the present invention, a case where the damping member 40 is made of a mesh member will be described.
The damping member 40 is made of resin or metal. The damping member 40 has a fine mesh shape. The fuel that has entered between the outer tube 20 and the inner tube 30 from the connector 21 can pass through the portion where the damping member 40 is disposed. The damping member 40 is fixedly attached to at least one of the inner surface of the outer tube 20 and the outer surface of the inner tube 30.

減衰部材４０は、デリバリパイプ１０の長手方向（軸方向）の全体にわたって配置されていてもよいが、図１に示すように、デリバリパイプ１０の長手方向で、凹部２２が設けられている部位のみ（凹部２２が設けられている部位とその近傍のみを含む）に配置されていることが望ましい。減衰部材４０が凹部２２部位のみに配置されている場合、各凹部２２部位に配置される減衰部材４０は、一部品構成であってもよく、図４に示すように、複数部品（図４では５部品）構成であってもよい。減衰部材４０は、外管２０の内面と内管３０の外面との間の距離が小とされている部分のみに配置されている。
減衰部材４０は、内管３０の周方向の一部のみに配置されている。減衰部材４０は、断面視で、内管３０の少なくとも平面部３１に接触している。減衰部材４０は、断面視で、平面部３１の全体に接触していることが望ましいが、平面部３１の一部のみに接触していてもよい。 The damping member 40 may be arranged over the entire longitudinal direction (axial direction) of the delivery pipe 10, but as shown in FIG. 1, only the portion where the recess 22 is provided in the longitudinal direction of the delivery pipe 10. It is desirable that it is disposed at (including only the portion where the recess 22 is provided and the vicinity thereof). When the attenuation member 40 is disposed only in the recess 22 site, the attenuation member 40 disposed in each recess 22 site may have a single component configuration, and as shown in FIG. 5 parts) configuration. The damping member 40 is disposed only in a portion where the distance between the inner surface of the outer tube 20 and the outer surface of the inner tube 30 is small.
The damping member 40 is disposed only in a part of the inner tube 30 in the circumferential direction. The damping member 40 is in contact with at least the flat portion 31 of the inner tube 30 in a cross-sectional view. Although it is desirable that the attenuation member 40 is in contact with the entire flat portion 31 in a cross-sectional view, it may be in contact with only a part of the flat portion 31.

つぎに、本発明実施例の作用、効果を説明する。
本発明実施例では、デリバリパイプ１０が内管３０を備えているので（外管２０と内管３０の二重管構造をとっているので）、内管３０の壁が変形振動することで外管２０と内管３０との間の燃圧脈動を低減できる。
また、内管３０の壁の変形振動を減衰させる減衰部材４０が設けられているので、減衰部材４０が設けられていない場合に比べて、早期に内管３０の壁の変形振動を止めることができる。その結果、減衰部材４０が設けられていない場合に比べて、内管３０と外管２０から放射される音を低減できる。
減衰部材４０による減衰効果で内管３０の面振動が低減され、その結果、内管３０および外管２０から放射される音が低減する。 Next, the operation and effect of the embodiment of the present invention will be described.
In the embodiment of the present invention, the delivery pipe 10 includes the inner pipe 30 (since it has a double pipe structure of the outer pipe 20 and the inner pipe 30), so that the wall of the inner pipe 30 deforms and vibrates. The fuel pressure pulsation between the pipe 20 and the inner pipe 30 can be reduced.
Further, since the damping member 40 that attenuates the deformation vibration of the wall of the inner tube 30 is provided, the deformation vibration of the wall of the inner tube 30 can be stopped earlier than in the case where the damping member 40 is not provided. it can. As a result, the sound radiated from the inner tube 30 and the outer tube 20 can be reduced as compared with the case where the attenuation member 40 is not provided.
The surface vibration of the inner tube 30 is reduced by the damping effect of the damping member 40, and as a result, the sound radiated from the inner tube 30 and the outer tube 20 is reduced.

内管３０が平面部３１を備えているので、平面部３１は容易に変形できる。そのため、平面部３１が変形振動することで外管２０と内管３０との間の燃圧脈動を低減できる。
また、減衰部材４０が平面部３１に接触しているので、振幅が大きい部位の振動を減衰させることができる。 Since the inner tube 30 includes the flat portion 31, the flat portion 31 can be easily deformed. Therefore, the fuel pressure pulsation between the outer tube 20 and the inner tube 30 can be reduced by deforming and vibrating the flat portion 31.
In addition, since the damping member 40 is in contact with the flat surface portion 31, it is possible to attenuate the vibration of a portion having a large amplitude.

減衰部材４０が内管３０の周方向の一部のみに配置されているので、減衰部材４０が内管３０の全周にわたって配置されている場合に比べて、配置する（詰める）減衰部材４０の量を少なくできコスト削減できる。また、減衰部材４０が内管３０の全周にわたって配置されている場合に比べて、減衰部材４０が外管２０と内管３０との間を流れる燃料の流れに及ぼす影響を小さくできる。   Since the damping member 40 is arranged only in a part of the inner tube 30 in the circumferential direction, the damping member 40 to be arranged (packed) is compared with the case where the damping member 40 is arranged over the entire circumference of the inner tube 30. The amount can be reduced and the cost can be reduced. In addition, the influence of the damping member 40 on the flow of fuel flowing between the outer tube 20 and the inner tube 30 can be reduced as compared with the case where the damping member 40 is disposed over the entire circumference of the inner tube 30.

減衰部材４０がデリバリパイプ１０の長手方向で凹部２２が設けられている部位のみに配置されている場合、減衰部材４０がデリバリパイプ１０の長手方向全体にわたって配置されている場合に比べて、配置する減衰部材４０の量を少なくできコスト削減できる。また、減衰部材４０がデリバリパイプ１０の長手方向全体にわたって配置されている場合に比べて、減衰部材４０が外管２０と内管３０との間を流れる燃料の流れに及ぼす影響を小さくできる。また、内管３０の振幅は内管３０の長手方向で連通路２３付近で最大になるので、凹部２２部位のみに減衰部材４０を配置することにより効果的に内管３０の変形振動を減衰させることができる。
減衰部材４０がメッシュ部材であるので、減衰部材４０が設けられている部分にも燃料は流れる。そのため、減衰部材が弾性ゴム等の中実の部材である場合に比べて、減衰部材４０が外管２０と内管３０との間を流れる燃料の流れに及ぼす影響は小さい。 When the damping member 40 is disposed only in the portion where the recess 22 is provided in the longitudinal direction of the delivery pipe 10, the damping member 40 is disposed as compared with the case where the damping member 40 is disposed over the entire longitudinal direction of the delivery pipe 10. The amount of the damping member 40 can be reduced and the cost can be reduced. In addition, the influence of the damping member 40 on the flow of the fuel flowing between the outer pipe 20 and the inner pipe 30 can be reduced as compared with the case where the damping member 40 is arranged over the entire longitudinal direction of the delivery pipe 10. Further, since the amplitude of the inner tube 30 is maximized in the longitudinal direction of the inner tube 30 in the vicinity of the communication path 23, the deformation vibration of the inner tube 30 is effectively damped by disposing the damping member 40 only in the recess 22 region. be able to.
Since the damping member 40 is a mesh member, the fuel also flows through the portion where the damping member 40 is provided. Therefore, compared with the case where the damping member is a solid member such as elastic rubber, the influence of the damping member 40 on the flow of fuel flowing between the outer tube 20 and the inner tube 30 is small.

内管３０が開放端３２を備えるので、内外管２０、３０が金属製であり内管３０を外管２０に溶接するとき、内管が閉塞構造をとる場合に比べて、内管３０の内圧が低くなる。そのため、内管が閉塞構造をとる場合に比べて、内管３０が変形・破損することを防止することができる。
減衰部材４０は、外管２０と内管３０との間に配置されるので、減衰部材４０がデリバリパイプ１０の外部にはみ出すことがなく、スペース上有利である。 Since the inner tube 30 includes the open end 32, when the inner and outer tubes 20, 30 are made of metal and the inner tube 30 is welded to the outer tube 20, the inner pressure of the inner tube 30 is larger than when the inner tube has a closed structure. Becomes lower. Therefore, it is possible to prevent the inner tube 30 from being deformed or damaged as compared with the case where the inner tube has a closed structure.
Since the damping member 40 is disposed between the outer tube 20 and the inner tube 30, the damping member 40 does not protrude outside the delivery pipe 10, which is advantageous in terms of space.

本発明実施例のデリバリパイプの透視平面図である。It is a see-through | perspective plan view of the delivery pipe of this invention Example. 本発明実施例のデリバリパイプの透視正面図である。It is a see-through | perspective front view of the delivery pipe of the Example of this invention. 本発明実施例のデリバリパイプの右側面図である。It is a right view of the delivery pipe of the Example of this invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG.

符号の説明Explanation of symbols

１０ デリバリパイプ
２０ 外管
２１ コネクタ
２２ 凹部
２３ 連通路
３０ 内管
３１ 内管の平面部
３２ 内管の開放端
４０ 減衰部材 DESCRIPTION OF SYMBOLS 10 Delivery pipe 20 Outer tube 21 Connector 22 Recess 23 Communication path 30 Inner tube 31 Flat portion 32 of inner tube Open end 40 of inner tube Damping member

Claims (6)

複数のインジェクタが取付けられる外管と、
前記外管の内側に配置され開放端を備える内管と、
前記外管と前記内管との間で前記外管と前記内管とに接触して配置され前記内管の壁の変形振動を減衰させる減衰部材と、
を有するデリバリパイプ。 An outer tube to which a plurality of injectors are mounted;
An inner tube disposed inside the outer tube and having an open end;
A damping member disposed between the outer tube and the inner tube in contact with the outer tube and the inner tube to attenuate deformation vibration of the wall of the inner tube;
Having a delivery pipe. 前記内管は平面部を備えており、前記減衰部材は前記内管の平面部に接触している請求項１記載のデリバリパイプ。   The delivery pipe according to claim 1, wherein the inner pipe includes a flat portion, and the damping member is in contact with the flat portion of the inner pipe. 前記減衰部材は前記内管の周方向の一部のみに配置されている請求項２記載のデリバリパイプ。   The delivery pipe according to claim 2, wherein the damping member is disposed only in a part of the inner pipe in the circumferential direction. 前記外管は該外管の長手方向に間隔をおいて内側に凹む複数の凹部を備えており該凹部に前記インジェクタとデリバリパイプとを連通する連通路が設けられており、
前記減衰部材は前記外管の長手方向で前記凹部が設けられている部位のみに配置されている、請求項１記載のデリバリパイプ。 The outer tube includes a plurality of recesses recessed inwardly at intervals in the longitudinal direction of the outer tube, and a communication path is provided in the recess for communicating the injector and the delivery pipe.
The delivery pipe according to claim 1, wherein the damping member is disposed only in a portion where the concave portion is provided in the longitudinal direction of the outer tube. 前記減衰部材はメッシュ部材である請求項１記載のデリバリパイプ。   The delivery pipe according to claim 1, wherein the damping member is a mesh member. 前記減衰部材は弾性部材である請求項１記載のデリバリパイプ。   The delivery pipe according to claim 1, wherein the damping member is an elastic member.
JP2005254337A 2005-09-02 2005-09-02 Delivery pipe Pending JP2007064160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005254337A JP2007064160A (en) 2005-09-02 2005-09-02 Delivery pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005254337A JP2007064160A (en) 2005-09-02 2005-09-02 Delivery pipe

Publications (1)

Publication Number Publication Date
JP2007064160A true JP2007064160A (en) 2007-03-15

Family

ID=37926637

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005254337A Pending JP2007064160A (en) 2005-09-02 2005-09-02 Delivery pipe

Country Status (1)

Country Link
JP (1) JP2007064160A (en)

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