JP2003129920A - Fuel delivery pipe - Google Patents
Fuel delivery pipeInfo
- Publication number
- JP2003129920A JP2003129920A JP2001323352A JP2001323352A JP2003129920A JP 2003129920 A JP2003129920 A JP 2003129920A JP 2001323352 A JP2001323352 A JP 2001323352A JP 2001323352 A JP2001323352 A JP 2001323352A JP 2003129920 A JP2003129920 A JP 2003129920A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- pipe
- arcuate
- communication pipe
- delivery pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子燃料噴射式自
動車用エンジンの燃料加圧ポンプから送給された燃料を
エンジンの各吸気通路あるいは気筒内に直接噴射する燃
料インジェクタ（噴射ノズル）を介して供給するための
フユーエルデリバリパイプの改良に関し、特に燃料通路
を有する連通管の断面構造と外部構造に係るものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injector (injection nozzle) for directly injecting fuel fed from a fuel pressure pump of an electronic fuel injection type automobile engine into each intake passage or cylinder of the engine. TECHNICAL FIELD The present invention relates to an improvement of a fuel delivery pipe for supplying the fuel in particular, and particularly to a cross-sectional structure and an external structure of a communication pipe having a fuel passage.
【０００２】[0002]
【従来の技術】フユーエルデリバリパイプは、ガソリン
エンジンの電子燃料噴射システムに広く使用されてお
り、燃料通路を有する連通管から複数個の円筒状ソケッ
トを介して燃料インジェクタに燃料を送った後、燃料タ
ンク側へと戻るための戻り通路を有するタイプと、戻り
通路を持たないタイプ（リターンレス）とがある。最近
は高温の戻り燃料による蒸散ガス低減対策やコストダウ
ンのため戻り通路を持たないタイプが増加してきたが、
それに伴い、インジェクタから噴射させるために弁を開
閉させるスプールの往復運動に起因する反射波（衝撃
波）や脈動圧による燃料噴射脈動によって、フユーエル
デリバリパイプや関連部品が振動し耳ざわりな異音を発
するという問題が発生していた。加えて、インジェクタ
のスプールの着座に伴う衝撃による異音も発生してい
た。燃料を直接燃焼室内に噴射するいわゆる直噴型のエ
ンジンでは、高圧のサプライポンプが設けられるため、
その大きな脈動を吸収するためにパルセーションダンパ
が設けられており、通常の燃料噴射型（ＭＰＩ）エンジ
ンの場合においても一部で採用されているが、スペース
の制約とコスト高から採用するのは容易でない。Fuel delivery pipes are widely used in electronic fuel injection systems for gasoline engines and, after delivering fuel from a communicating pipe having a fuel passage to a fuel injector through a plurality of cylindrical sockets, There are a type having a return passage for returning to the fuel tank side and a type having no return passage (returnless). Recently, the number of types that do not have a return passage has increased due to measures to reduce transpiration gas by high temperature return fuel and cost reduction,
Along with that, the fuel delivery pulsation due to the reflected wave (shock wave) due to the reciprocating motion of the spool that opens and closes the valve for injecting from the injector and the fuel injection pulsation due to the pulsating pressure vibrates and produces a strange noise. There was a problem. In addition, abnormal noise was also generated due to the impact caused by the sitting of the injector spool. In a so-called direct injection type engine that directly injects fuel into the combustion chamber, a high pressure supply pump is provided,
A pulsation damper is provided to absorb the large pulsation, and it is used in some cases even in the case of a normal fuel injection type (MPI) engine, but it is adopted due to space constraints and high cost. Not easy.
【０００３】そこで本発明者等は、特開２０００−３２
９０３１号「フユーエルデリバリパイプ」に記載したよ
うに、連通管の壁面の一部を可撓性のアブゾーブ面にし
て振動を吸収させる方法として、連通管の断面を偏平形
状にすることを提案した。しかしながら、連通管を偏平
形状にすると、エンジンの周囲にある配管部品等に干渉
したり接触したりするおそれがあり、さらに工具を挿入
したり回転させたりするスペースが確保できないため、
充分な偏平形状を採用しにくいという欠点があることが
判明した。Therefore, the inventors of the present invention have disclosed in Japanese Patent Laid-Open No. 2000-32.
As described in No. 9031 “Fuel Delivery Pipe”, it was proposed to make the cross-section of the communication pipe a flat shape as a method of absorbing a vibration by making a part of the wall surface of the communication pipe a flexible absorbing surface. . However, if the communication pipe has a flat shape, it may interfere with or come into contact with piping parts and the like around the engine, and since a space for inserting or rotating a tool cannot be secured,
It has been found that there is a drawback that it is difficult to adopt a sufficiently flat shape.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、燃料
インジェクタの開閉に伴って発生する衝撃波や脈動圧を
低減させるために充分な偏平形状を採用しながら、他部
品との干渉を防止し、工具のスペースを確保することを
可能にする新規なフユーエルデリバリパイプの構造を提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to prevent interference with other parts while adopting a flat shape sufficient for reducing shock waves and pulsating pressure generated by opening and closing of a fuel injector. The purpose is to provide a new fuel delivery pipe structure that makes it possible to secure space for tools.
【０００５】[0005]
【課題を解決するための手段】本発明の前述した課題
は、連通管の断面が偏平形状に形成され、かつ連通管の
外壁部が少なくとも１つの平坦状又は円弧状で可撓性の
アブゾーブ面を包含しており、偏平形状の一部にプレス
機械と切断刃による円弧状切断面が形成され、この円弧
状切断面に封止キャップがろう付け又は溶接により固着
されて円弧状凹所を形成しており、これにより、ソケッ
トに流入する燃料の脈動圧と衝撃波をアブゾーブ面の撓
みで低減させると共に円弧状凹所で他部品との干渉を回
避するようになっているフユーエルデリバリパイプによ
って達成される。SUMMARY OF THE INVENTION The above-mentioned problems of the present invention are as follows. The communicating pipe is formed in a flat cross section, and the outer wall portion of the communicating pipe is at least one flat or arc-shaped flexible absorbing surface. The arc-shaped cutting surface formed by the press machine and the cutting blade is formed in a part of the flat shape, and the sealing cap is fixed to the arc-shaped cutting surface by brazing or welding to form the arc-shaped recess. This is achieved by a fuel delivery pipe that reduces the pulsating pressure and shock wave of the fuel flowing into the socket by bending the absorber surface and avoids interference with other parts in the arcuate recess. To be done.
【０００６】本発明において、プレス機械と切断刃によ
る円弧状切断面を形成する方法は、例えば本出願人によ
る特許第３０１０３０７号「フユーエルデリバリパイプ
の製造方法」に記載されているような従来の方法を用い
ることができる。その方法については添付図面の図６を
参照して後述する。In the present invention, a method of forming an arcuate cut surface by a press machine and a cutting blade is a conventional method as described in, for example, Japanese Patent No. 3010307, "Method for manufacturing fuel delivery pipe". Any method can be used. The method will be described later with reference to FIG. 6 of the accompanying drawings.
【０００７】[0007]
【作用】本発明によれば、上述した構造を採用すること
により、アブゾーブ面の撓みによる振動吸収効果と共
に、円弧状凹所で他部品との干渉が回避でき、工具や配
線などを挿入するスペースも確保されることになり、充
分な偏平形状を採用することが可能になる。According to the present invention, by adopting the above-mentioned structure, the vibration absorbing effect due to the bending of the absorber surface can be avoided, and the interference with other parts can be avoided by the arcuate recess, and the space for inserting a tool, wiring, etc. It is also ensured that a sufficient flat shape can be adopted.
【０００８】アブゾーブ面による脈動吸収の理論的な根
拠としては、燃料インジェクタの開閉時に発生する衝撃
波が、ソケットの燃料流入口へと流入あるいは瞬間的な
逆流によって流出する際に、可撓性のアブゾーブ面の撓
みによって衝撃や脈動が吸収されることと、バネ定数の
比較的小さい薄肉の部材が撓んで変形することにより容
積が変化し燃料の圧力変動を吸収するものと理解され
る。The theoretical basis of pulsation absorption by the absorber surface is that the shock absorber generated when the fuel injector is opened and closed flows into the fuel inlet of the socket or flows out by a momentary reverse flow, and thus has a flexible absorber. It is understood that shock and pulsation are absorbed by the bending of the surface, and that the thin member having a relatively small spring constant is bent and deformed to change the volume and absorb the fuel pressure fluctuation.
【０００９】本発明は他の態様として、円弧状凹所の仮
想延長部上に連通管をエンジン本体に固定するための穴
付きブラケットを配置することにより、穴付ブラケット
が他部品に干渉することを防止することができ、加えて
固定用ボルトを締め付ける際の工具のスペースを確保す
ることができる。As another aspect of the present invention, by disposing a bracket with a hole for fixing the communication pipe to the engine body on a virtual extension of the arcuate recess, the bracket with a hole interferes with other parts. Can be prevented, and in addition, a space for a tool when tightening the fixing bolt can be secured.
【００１０】本発明はさらに他の態様として、封止キャ
ップに連通管を固定するための穴付きブラケットを一体
化させて構成することができ、これにより従来の突起物
を削除してフユーエルデリバリパイプ全体をコンパクト
に構成することができ、他部品との干渉をより一層回避
できるようになる。As a further aspect of the present invention, a bracket with a hole for fixing the communication pipe to the sealing cap can be integrally formed, whereby the conventional projection can be eliminated and the fuel delivery can be eliminated. The entire pipe can be made compact, and interference with other parts can be further avoided.
【００１１】本発明において、連通管の外壁部やアブゾ
ーブ面の板厚・縦横の比率・ソケットの燃料流入口と対
向する面との隙間などは、特にエンジンのアイドリング
時において振動や脈動が最も小さい値になるように実験
や解析によって定めることができる。本発明は基本的に
連通管の断面構造と外部構造に係るものであるから、ブ
ラケットの取り付け寸法を維持することにより、従来の
フユーエルデリバリパイプに対して互換性を維持するこ
とができる。本発明の他の特徴及び利点は、添付図面の
実施例を参照した以下の記載により明らかとなろう。In the present invention, the plate thickness of the outer wall of the communicating pipe and the absorbing surface, the ratio of the length to the width, and the clearance between the socket and the surface facing the fuel inlet are the smallest in vibration and pulsation, especially when the engine is idling. The value can be determined by experiments or analysis. Since the present invention basically relates to the cross-sectional structure and the external structure of the communication pipe, the compatibility with the conventional fuel delivery pipe can be maintained by maintaining the mounting dimensions of the bracket. Other features and advantages of the present invention will be apparent from the following description with reference to the embodiments of the accompanying drawings.
【００１２】[0012]
【発明の実施の形態】図１は本発明の第１の態様による
フユーエルデリバリパイプ１０を表しており、図１Ａは
全体の斜視図、図１Ｂはソケット部分の縦断面図を表し
ている。クランク軸方向に沿って延伸する連通管１１の
底面には、噴射ノズルの先端を受け入れるためのソケッ
ト３が、例えば３気筒エンジンであれば３個が所定の間
隔と角度で取り付けられている。連通管１１には、さら
にフユーエルデリバリパイプ１０をエンジン本体に取り
付けるための厚肉で堅固なブラケット４が２個横方向に
架け渡されている。連通管１１の長手方向端部はエンド
キャップ１３，１４で気密に封止されている。1 shows a fuel delivery pipe 10 according to a first embodiment of the present invention, FIG. 1A is an overall perspective view, and FIG. 1B is a vertical sectional view of a socket portion. On the bottom surface of the communication pipe 11 extending along the crankshaft direction, three sockets 3 for receiving the tip of the injection nozzle are attached at a predetermined interval and angle in the case of a three-cylinder engine, for example. Two thick and rigid brackets 4 for horizontally attaching the fuel delivery pipe 10 to the engine body are laterally provided on the communication pipe 11. The longitudinal ends of the communication pipe 11 are hermetically sealed by end caps 13 and 14.
【００１３】連通管１１の側端部にはコネクタ（図示せ
ず）を介して燃料導入管２がろう付けや溶接で固定され
ている。連通管１１のいずれかの端部には燃料タンクに
戻るための戻り管を設けることができるが、リターンレ
スタイプのフユーエルデリバリパイプでは、戻り管は設
けられていない。燃料は矢印の方向へと流れ、ソケット
３から燃料インジェクタ（図示せず）を介して各吸気通
路あるいは気筒内へ直接噴射される。The fuel introducing pipe 2 is fixed to the side end of the communicating pipe 11 by brazing or welding via a connector (not shown). A return pipe for returning to the fuel tank can be provided at either end of the communication pipe 11, but a return pipe is not provided in the returnless type fuel delivery pipe. Fuel flows in the direction of the arrow and is directly injected from the socket 3 into each intake passage or cylinder through a fuel injector (not shown).
【００１４】図１Ａ，Ｂに示すように、この例では連通
管１１は円形断面の低炭素鋼もしくはステンレス鋼パイ
プをつぶして形成した偏平楕円形断面に作られており、
偏平部分の内側下面がソケット３の燃料流入口１３（図
１Ｂ）に対向している。連通管１１の断面寸法は、例え
ば板厚１．２ｍｍの平板で、高さＨを６．４ｍｍ、幅Ｗ
を３２ｍｍに設定することができ、この平板のバネ定数
は約６５ｋｇｆ／ｃｍ 2 ／ｍｍである。本発明に従い、
偏平楕円形断面の連通管１１の外壁部のほぼ全体がアブ
ゾーブ面を提供し、特に燃料流入口１３に対向する平坦
部分１１ａはそのスパンの長さから主アブゾーブ面とし
て作用する。As shown in FIGS. 1A and 1B, communication is performed in this example.
Tube 11 is a low carbon steel or stainless steel pie with circular cross section
It has a flat elliptical cross section formed by crushing
The inner lower surface of the flat portion is the fuel inlet 13 of the socket 3 (see FIG.
1B). The cross-sectional dimension of the communication pipe 11 is, for example,
For example, a flat plate with a plate thickness of 1.2 mm, height H of 6.4 mm, width W
Can be set to 32 mm, and the spring constant of this flat plate
Is about 65 kgf / cm 2 / Mm. According to the invention,
Almost the entire outer wall of the communication pipe 11 having a flat elliptical cross section is
A flat surface that provides a zorb surface, especially facing the fuel inlet 13.
Due to the length of its span, the portion 11a is the main absorber surface.
Works.
【００１５】さらに、図１Ａに示すように本発明の特徴
に従い、連通管１１の偏平形状の一部にプレス機械と切
断刃による円弧状切断面１６が形成され、この円弧状切
断面１６に、これと対応する形状の封止キャップ１８が
突き合わせ溶接の形でろう付け及び又は溶接により固着
されて円弧状凹所２０を形成している。かくして、ソケ
ットに流入する燃料の脈動圧と衝撃波をアブゾーブ面の
撓みで低減させると共に、円弧状凹所で他部品との干渉
を回避し、かつ工具のスペースを確保するようになって
いる。Further, as shown in FIG. 1A, according to the feature of the present invention, an arcuate cutting surface 16 formed by a press machine and a cutting blade is formed in a part of the flat shape of the communicating pipe 11, and the arcuate cutting surface 16 is Corresponding sealing caps 18 are brazed and / or welded together in the form of butt welds to form arcuate recesses 20. Thus, the pulsating pressure and the shock wave of the fuel flowing into the socket are reduced by the bending of the absorber surface, the arcuate recess avoids the interference with other parts, and the space for the tool is secured.
【００１６】図２Ａ，Ｂ，Ｃは、連通管１１に形成され
た円弧状切断面１６と封止キャップ１８の関係を斜視
図、平面図及び断面図で表している。円弧状の切断面と
することにより、アブゾーブ面の撓みに影響を及ぼすこ
とが最小限となり、本発明により振動低減効果と干渉防
止効果の両面を達成することができる。2A, 2B and 2C show a perspective view, a plan view and a sectional view of the relationship between the arcuate cut surface 16 formed on the communicating pipe 11 and the sealing cap 18. The arc-shaped cut surface minimizes the influence on the bending of the absorber surface, and the present invention can achieve both the vibration reduction effect and the interference prevention effect.
【００１７】図６は、連通管に円弧状切断面を形成する
ための連通管Ｒカット装置を表しており、前述したよう
にこの装置は特許第３０１０３０７号に記載されている
装置を参照している。この装置７０は、偏平形状の連通
管１１を両側からクランプする２つ割りの把持機構７４
と、把持機構７４を支持する基礎台７６と、円形棒状体
の先端を斜めに切断した形状の切断刃７８をクランプす
る保持部８０とで構成されている。基礎台７６と保持部
８０はプレス装置に組込まれており、両者の間隔は所定
のサイクルで変化させられる。把持機構７４は、固定チ
ャック８２と可動チャック８４、及び可動チャック８４
を動かすための液圧、空気圧又は機械式作動ユニット８
６とを包含している。固定チャック８２と可動チャック
８４の合せ面９０の位置には、固定チャック側と可動チ
ャック側のそれぞれに円弧状の溝（図示せず）が設けら
れており、これらの溝はチャックが当接した状態で切断
刃７８の外形にほぼ等しい円形となるように形成され
て、ガイドの役目を果たす。かくして、このＲカット装
置を用いれば、連通管の偏平状断面の側面に円弧状凹所
を形成できることになる。FIG. 6 shows a communicating pipe R-cutting device for forming an arcuate cutting surface on the communicating pipe. As described above, this device is referred to the device described in Japanese Patent No. 3010307. There is. This device 70 includes a split gripping mechanism 74 that clamps the flat communication tube 11 from both sides.
A base 76 that supports the gripping mechanism 74, and a holder 80 that clamps a cutting blade 78 having a shape in which the tip of a circular rod is cut obliquely. The base 76 and the holding unit 80 are incorporated in the press device, and the distance between the two is changed in a predetermined cycle. The gripping mechanism 74 includes a fixed chuck 82, a movable chuck 84, and a movable chuck 84.
Hydraulic, pneumatic or mechanical actuation unit 8 for moving
6 and 6 are included. Arc-shaped grooves (not shown) are provided on the fixed chuck side and the movable chuck side, respectively, at the position of the mating surface 90 of the fixed chuck 82 and the movable chuck 84, and these chucks contact the grooves. In this state, the cutting blade 78 is formed into a circular shape that is substantially the same as the outer shape of the cutting blade 78, and serves as a guide. Thus, by using this R-cut device, an arcuate recess can be formed on the side surface of the flat cross section of the communicating pipe.
【００１８】図３Ａ，Ｂ，Ｃは封止キャップの変形例を
表しており、連通管１１に円弧状凹所２０を形成するた
めの封止キャップ２２と連通管１１の関係を斜視図、平
面図及び断面図で表している。図３Ｃに示すように、封
止キャップ２２は円弧状切断面上にオーバーラップする
形で当接され、ろう付け及び又は溶接により連通管１１
に固着されている。FIGS. 3A, 3B and 3C show a modification of the sealing cap. The relationship between the sealing cap 22 and the communicating pipe 11 for forming the arcuate recess 20 in the communicating pipe 11 is shown in a perspective view and a plan view. It is shown in the figure and cross-sectional view. As shown in FIG. 3C, the sealing cap 22 is abutted on the arcuate cut surface in an overlapping manner and is brazed and / or welded to form the communication pipe 11.
Is stuck to.
【００１９】図４Ａ，Ｂ，Ｃ，Ｄは本発明の他の実施例
を表しており、円弧状凹所２０の仮想延長部上に連通管
を固定するための穴付きブラケット３０を配置して、穴
付ブラケット３０が他部品に干渉することを防止し、か
つ工具を用いて固定用ボルト（図示せず）を締め付ける
際に工具が他部品や連通管１１に干渉することを防止す
るようにした例である。FIGS. 4A, 4B, 4C and 4D show another embodiment of the present invention, in which a bracket 30 having a hole for fixing a communicating pipe is arranged on a virtual extension of the arcuate recess 20. To prevent the bracket 30 with holes from interfering with other parts, and also to prevent the tool from interfering with other parts or the communicating pipe 11 when tightening a fixing bolt (not shown) with the tool. It is an example.
【００２０】図５Ａ，Ｂ，Ｃは本発明のさらに他の実施
例を表しており、円弧状切断面１６を封止するための封
止キャップ４０に連通管を固定するための穴付きブラケ
ットを一体化させて構成した例である。こうすると、従
来のフユーエルデリバリパイプで側方に向けて突出して
いた突起物を削除してフユーエルデリバリパイプ全体を
コンパクトに構成することができ、他部品との干渉をよ
り一層回避できるようになる。封止キャップ４０と円弧
状切断面１６とはろう付け及び又は溶接により連通管１
１に固着されるが、前述した例に比べて溶接面積が大き
くなるため、燃料の内圧に耐えなければならない封止キ
ャップの強度が充分確保できるという利点がある。な
お、円弧状切断面１６の輪郭は正確な円弧である必要は
なく、略円弧状であれば種々の形状で良い。5A, 5B and 5C show still another embodiment of the present invention, in which a sealing cap 40 for sealing the arcuate cutting surface 16 is provided with a holed bracket for fixing the communicating pipe. This is an example configured by being integrated. By doing so, it is possible to remove the projections that have protruded to the side with the conventional fuel delivery pipe and make the entire fuel delivery pipe compact, and to further avoid interference with other parts. Become. The sealing cap 40 and the arcuate cut surface 16 are brazed and / or welded to form the communication pipe 1
Although it is fixed to No. 1, since the welding area is larger than that of the above-mentioned example, there is an advantage that the strength of the sealing cap that must withstand the internal pressure of fuel can be sufficiently secured. The contour of the arcuate cutting surface 16 does not have to be a precise arcuate shape, and may be any shape as long as it is substantially arcuate.
【００２１】[0021]
【発明の効果】以上詳細に説明した如く、本発明によれ
ば、燃料インジェクタの開閉時に発生するスプールの着
座に伴う衝撃波・ソケットの燃料流入口へと流入あるい
は瞬間的な逆流によって流出する際に発生する脈動圧な
どが偏平形状の連通管のアブゾーブ面の撓みによって低
減させられると共に、円弧状凹所の存在で他部品との干
渉を回避することができ、工具のスペースが確保される
等、その技術的効果には極めて顕著なものがある。As described above in detail, according to the present invention, the shock wave generated by the seating of the spool when the fuel injector is opened / closed ・ When the shock wave flows into the fuel inlet of the socket or flows out by the instantaneous backflow. Pulsating pressure that occurs is reduced by the bending of the absorber surface of the flat communication tube, and the presence of the arcuate recess can avoid interference with other parts, ensuring a space for tools, etc. The technical effect is extremely remarkable.
【図１】本発明によるフユーエルデリバリパイプ全体の
斜視図とソケット部分の断面図である。FIG. 1 is a perspective view of an entire fuel delivery pipe according to the present invention and a sectional view of a socket portion.
【図２】連通管と封止キャップの関係を表す一部破断斜
視図と平面図及びＰ−Ｐ線に沿う断面図である。FIG. 2 is a partially cutaway perspective view showing a relationship between a communication pipe and a sealing cap, a plan view and a cross-sectional view taken along line P-P.
【図３】封止キャップの変形例を表す一部破断斜視図と
平面図及びＱ−Ｑ線に沿う断面図である。FIG. 3 is a partially cutaway perspective view showing a modified example of the sealing cap, a plan view, and a cross-sectional view taken along the line QQ.
【図４】他の実施例による連通管と封止キャップの関係
を表す一部破断斜視図と平面図及びＲ−Ｒ線に沿う断面
図である。FIG. 4 is a partially cutaway perspective view showing a relationship between a communication pipe and a sealing cap according to another embodiment, a plan view, and a cross-sectional view taken along line RR.
【図５】さらに他の実施例による連通管と封止キャップ
の関係を表す一部破断斜視図と平面図及びＳ−Ｓ線に沿
う断面図である。FIG. 5 is a partially cutaway perspective view showing a relationship between a communication pipe and a sealing cap according to still another embodiment, a plan view, and a cross-sectional view taken along line SS.
【図６】連通管に円弧状断面を形成するＲカット装置の
縦断面図である。FIG. 6 is a vertical cross-sectional view of an R-cut device that forms an arcuate cross-section in a communication pipe.
２ 燃料導入管 ３ ソケット ４ 固定用ブラケット １０ フユーエルデリバリパイプ １１ 連通管 １１ａ アブゾーブ面 １３ 燃料流入口 １６ 円弧状切断面 １８，２２ 封止キャップ ２０ 円弧状凹所 ３０，４０ 固定用ブラケット 2 Fuel introduction pipe 3 socket 4 Fixing bracket 10 Fuel Delivery Pipe 11 communication pipe 11a Absorbing surface 13 Fuel inlet 16 arc-shaped cut surface 18,22 Sealing cap 20 arc-shaped recess 30, 40 Fixing bracket
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０２Ｍ 55/02 Ｆ０２Ｍ 55/02 ３５０Ｚ Ｂ２１Ｄ 28/28 Ｂ２１Ｄ 28/28 Ｆ０２Ｍ 37/00 Ｆ０２Ｍ 37/00 Ｄ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) F02M 55/02 F02M 55/02 350Z B21D 28/28 B21D 28/28 F02M 37/00 F02M 37/00 D
Claims (3)
連通管と、この連通管の端部又は側部に固定された燃料
導入管と、前記連通管に交差して突設され一部が前記燃
料通路に連通し開放端部が燃料噴射ノズル先端を受け入
れる複数のソケットとを備えて成るフユーエルデリバリ
パイプにおいて、 前記連通管の断面が偏平形状に形成され、かつ前記連通
管の外壁部が少なくとも１つの平坦状又は円弧状で可撓
性のアブゾーブ面を包含しており、 前記偏平形状の一部にプレス機械と切断刃による円弧状
切断面が形成され、 前記円弧状切断面に封止キャップがろう付け又は溶接に
より固着されて円弧状凹所を形成しており、 これにより、ソケットに流入する燃料の脈動圧と衝撃波
をアブゾーブ面の撓みで低減させると共に円弧状凹所で
他部品との干渉を回避するようになっていることを特徴
とするフユーエルデリバリパイプ。1. A communicating pipe having a linearly extending fuel passage therein, a fuel introducing pipe fixed to an end portion or a side portion of the communicating pipe, and a protruding portion partially intersecting with the communicating pipe. In a fuel delivery pipe, which is connected to the fuel passage and has a plurality of sockets whose open end receives a tip of a fuel injection nozzle, a cross section of the communication pipe is formed into a flat shape, and an outer wall portion of the communication pipe is formed. At least one flat or arcuate flexible absorber surface is included, and an arcuate cutting surface formed by a press machine and a cutting blade is formed in a part of the flat shape, and the arcuate cutting surface is sealed. The cap is fixed by brazing or welding to form an arcuate recess, which reduces the pulsating pressure and shock wave of the fuel flowing into the socket due to the bending of the absorber surface, and allows the arcuate recess to separate from other parts. Off Ewell delivery pipe, characterized in that is made as to avoid interference.
を固定するための穴付きブラケットが配置されている請
求項１記載のフユーエルデリバリパイプ。2. The fuel delivery pipe according to claim 1, wherein a bracket with a hole for fixing the communication pipe is arranged on a virtual extension of the arcuate recess.
めの穴付きブラケットが一体化されている請求項１記載
のフユーエルデリバリパイプ。3. The fuel delivery pipe according to claim 1, wherein a bracket with a hole for fixing the communication pipe is integrated with the sealing cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001323352A JP3996369B2 (en) | 2001-10-22 | 2001-10-22 | Fuel delivery pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001323352A JP3996369B2 (en) | 2001-10-22 | 2001-10-22 | Fuel delivery pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003129920A true JP2003129920A (en) | 2003-05-08 |
| JP3996369B2 JP3996369B2 (en) | 2007-10-24 |
Family
ID=19140253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001323352A Expired - Fee Related JP3996369B2 (en) | 2001-10-22 | 2001-10-22 | Fuel delivery pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3996369B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006077716A (en) * | 2004-09-10 | 2006-03-23 | Denso Corp | Method for jointing joint member used accumulator fuel injection system and method for jointing mounting stay |
| JP2006336490A (en) * | 2005-05-31 | 2006-12-14 | Usui Kokusai Sangyo Kaisha Ltd | Fuel delivery pipe and manufacturing method of fuel delivery pipe |
| WO2010001810A1 (en) | 2008-06-30 | 2010-01-07 | 臼井国際産業株式会社 | Fuel rail for high-pressure direct injection internal combustion engine and method of manufacturing the same |
| EP3418550A1 (en) | 2017-06-20 | 2018-12-26 | Hi-Vol Products LLC | Threaded fuel rails |
| US10208723B2 (en) | 2016-05-25 | 2019-02-19 | Hi-Vol Products | Threaded fuel rails |
| CN113385576A (en) * | 2021-08-18 | 2021-09-14 | 南通恒信精工机械有限公司 | Machining of machine parts is with section arc punching machine |
-
2001
- 2001-10-22 JP JP2001323352A patent/JP3996369B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006077716A (en) * | 2004-09-10 | 2006-03-23 | Denso Corp | Method for jointing joint member used accumulator fuel injection system and method for jointing mounting stay |
| JP2006336490A (en) * | 2005-05-31 | 2006-12-14 | Usui Kokusai Sangyo Kaisha Ltd | Fuel delivery pipe and manufacturing method of fuel delivery pipe |
| JP4488517B2 (en) * | 2005-05-31 | 2010-06-23 | 臼井国際産業株式会社 | Fuel delivery pipe and method for manufacturing the same |
| WO2010001810A1 (en) | 2008-06-30 | 2010-01-07 | 臼井国際産業株式会社 | Fuel rail for high-pressure direct injection internal combustion engine and method of manufacturing the same |
| US8596246B2 (en) | 2008-06-30 | 2013-12-03 | Usui Kokusai Sangyo Kaisha Limited | Fuel rail for high-pressure direct-injection internal combustion engines and method for manufacturing thereof |
| US10208723B2 (en) | 2016-05-25 | 2019-02-19 | Hi-Vol Products | Threaded fuel rails |
| EP3418550A1 (en) | 2017-06-20 | 2018-12-26 | Hi-Vol Products LLC | Threaded fuel rails |
| CN113385576A (en) * | 2021-08-18 | 2021-09-14 | 南通恒信精工机械有限公司 | Machining of machine parts is with section arc punching machine |
| CN113385576B (en) * | 2021-08-18 | 2021-10-15 | 南通恒信精工机械有限公司 | Machining of machine parts is with section arc punching machine |
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| Publication number | Publication date |
|---|---|
| JP3996369B2 (en) | 2007-10-24 |
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