JPWO2006137298A1 - Fuel injector positioning structure - Google Patents

Fuel injector positioning structure Download PDF

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Publication number
JPWO2006137298A1
JPWO2006137298A1 JP2007522246A JP2007522246A JPWO2006137298A1 JP WO2006137298 A1 JPWO2006137298 A1 JP WO2006137298A1 JP 2007522246 A JP2007522246 A JP 2007522246A JP 2007522246 A JP2007522246 A JP 2007522246A JP WO2006137298 A1 JPWO2006137298 A1 JP WO2006137298A1
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Prior art keywords
clip
fuel injector
supply pipe
fuel supply
branch pipe
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JP4157909B2 (en
Inventor
良貴 塩澤
良貴 塩澤
光男 海塩
光男 海塩
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Sanoh Industrial Co Ltd
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Sanoh Industrial Co Ltd
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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, e.g. clips
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Abstract

フューエルインジェクタの保持がより確実に行なえ、コンパクトなクリップの使用が可能であり、しかもクリップの型成形が容易なフューエルインジェクタの位置決め構造を提供することを目的とする。そして、この目的を達成するため、本発明は、フューエルインジェクタ１０の中間部周面に凸部１２を形成するとともに、分岐管４の周面を挟持する挟持舌片６，６と、燃料供給管１に当接して、分岐管４の軸心に対する回動を阻止するストッパ手段９と、フューエルインジェクタ１０の凸部１２を分岐管４の軸心方向に嵌合する凹部８を有するクリップ５を備え、クリップ５の挟持舌片６，６を分岐管４の周面に挟持させるとともに、ストッパ手段９を燃料供給管１に係合させ、フューエルインジェクタ１０の凸部１２をクリップ５の凹部８に嵌合させて、フューエルインジェクタ１０の分岐管４の軸心に対する回動方向の位置決めをした。It is an object of the present invention to provide a fuel injector positioning structure that can hold the fuel injector more securely, can use a compact clip, and can easily mold the clip. In order to achieve this object, the present invention forms the convex portion 12 on the peripheral surface of the intermediate portion of the fuel injector 10, the sandwiching tongue pieces 6 and 6 that sandwich the peripheral surface of the branch pipe 4, and the fuel supply pipe 1, a stopper means 9 that prevents rotation of the branch pipe 4 with respect to the axis of the branch pipe 4, and a clip 5 having a recess 8 that fits the convex part 12 of the fuel injector 10 in the axial direction of the branch pipe 4. The clip tongues 6 and 6 are clamped on the peripheral surface of the branch pipe 4, and the stopper means 9 is engaged with the fuel supply pipe 1, and the convex portion 12 of the fuel injector 10 is fitted into the concave portion 8 of the clip 5. In combination, the fuel injector 10 was positioned in the rotational direction with respect to the axis of the branch pipe 4.

Description

本発明は、フューエルインジェクタの位置決め構造に関し、詳しくは、クリップを用いたフューエルインジェクタの回動方向に対する位置決め構造に関するものである。   The present invention relates to a fuel injector positioning structure, and more particularly to a positioning structure for a rotation direction of a fuel injector using a clip.

フューエルインジェクタは、その基端部が燃料供給管に配設された分岐管に挿嵌されて保持される。このようなフューエルインジェクタでは、先端に噴射口が形成され、それらの噴射口から、燃料をインテークマニホールドの吸入管に、所定方向に向けて噴射させる必要があることから、フューエルインジェクタの回動方向に対する位置決めがなされている。
上記フューエルインジェクタの回動方向に対する位置決め構造としては、例えば、日本国特開平８−１００７３４号公報（以下、特許文献１）に記載された技術が存在する。この特許文献１に開示された技術は、円管状の基管に円管状の分岐管を設けた燃料供給管の前記分岐管にフューエルインジェクタを挿嵌し、板状弾性体のクリップの第１の挟持部で前記基管を挟持させ、第２の挟持部でフューエルインジェクタの胴部を挟持させるとともに、前記第２の挟持部に設けた凸部をフューエルインジェクタの胴部に設けた穴に嵌合させている。
ところで、上記特許文献１に開示されているクリップは、一端部で燃料供給管の基管を挟持し、他端部でフューエルインジェクタを挟持するものであるため、分岐管の軸心方向に長くなり、それだけ大型化してしまう。また、このクリップを、板金を折り曲げて挟持片を形成すると、幅方向に広くなって、それだけ大きな材料が必要となり、型によって成形する場合には、少なくとも３つの型が必要となり、コストアップになる。
また、特許文献１に開示された技術においては、フューエルインジェクタを燃料供給管の基管に支持されたクリップに保持させている、即ち、フューエルインジェクタの保持部から燃料供給管の保持部までの距離が長いので、フューエルインジェクタの保持が不確実になる虞がある。
また、近年、自動車のエンジン房内は、部品類が増加する傾向にあり、燃料供給管も他の部品との干渉を避けるために、レイアウト上の自由度が求められている。そのため、特許文献１に記載されているようなパイプをつないだ形状から、プレス加工により成形した２部品をロウ付けし、箱状とした燃料供給管が増えてきている。ところが、プレス成形品を接合した燃料供給管にあっては、その接合時に組付け誤差が生じる場合があり、特許文献１に記載されたクリップのように、燃料供給管自体を挟持する形状のものにあっては、この燃料供給管の組付け誤差に対応し難い。
本発明は、上述した従来のフューエルインジェクタの位置決め構造が有する課題に鑑みて成されたものであって、その目的は、フューエルインジェクタの保持がより確実に行なえ、コンパクトなクリップの使用が可能で、しかもクリップの型成形が容易なフューエルインジェクタの位置決め構造を提供することにある。The base end of the fuel injector is inserted and held in a branch pipe disposed in the fuel supply pipe. In such a fuel injector, since the injection ports are formed at the tips, and it is necessary to inject fuel from the injection ports to the intake pipe of the intake manifold in a predetermined direction, the rotation direction of the fuel injector Positioning has been made.
As a positioning structure with respect to the rotational direction of the fuel injector, for example, there is a technique described in Japanese Patent Laid-Open No. 8-1000073 (hereinafter referred to as Patent Document 1). In the technique disclosed in Patent Document 1, a fuel injector is inserted into the branch pipe of a fuel supply pipe in which a cylindrical branch pipe is provided in a cylindrical base pipe, and a first elastic clip clip is formed. The base tube is sandwiched by the sandwiching portion, the barrel portion of the fuel injector is sandwiched by the second sandwiching portion, and the convex portion provided in the second sandwiching portion is fitted into the hole provided in the barrel portion of the fuel injector. I am letting.
By the way, the clip disclosed in Patent Document 1 has a fuel supply pipe base tube sandwiched at one end and a fuel injector sandwiched at the other end, and therefore becomes longer in the axial direction of the branch pipe. That ’s why it gets bigger. Further, when the clip is bent to form a sandwiching piece, it becomes wider in the width direction, so that a larger material is required. When molding with a mold, at least three molds are required, which increases the cost. .
In the technique disclosed in Patent Document 1, the fuel injector is held by a clip supported by the base pipe of the fuel supply pipe, that is, the distance from the holding section of the fuel injector to the holding section of the fuel supply pipe. However, the fuel injector may be uncertainly held.
In recent years, the number of parts tends to increase in the engine compartment of an automobile, and the fuel supply pipe is also required to have flexibility in layout in order to avoid interference with other parts. For this reason, the number of fuel supply pipes that are box-shaped by brazing two parts molded by pressing from the shape of connecting pipes as described in Patent Document 1 is increasing. However, in a fuel supply pipe joined with a press-formed product, an assembly error may occur at the time of joining, and the fuel supply pipe itself is sandwiched like a clip described in Patent Document 1. In this case, it is difficult to cope with the assembly error of the fuel supply pipe.
The present invention has been made in view of the problems of the above-described conventional fuel injector positioning structure, and its purpose is to hold the fuel injector more reliably and to use a compact clip. In addition, it is an object of the present invention to provide a fuel injector positioning structure in which a clip can be easily molded.

上記した目的を達成するため、本発明に係るフューエルインジェクタの位置決め構造は、燃料供給管に形成した分岐管にフューエルインジェクタを挿嵌して取付けるフューエルインジェクタの位置決め構造において、前記フューエルインジェクタの中間部周面に凸部または凹部の一方を形成するとともに、前記分岐管の周面を挟持する挟持舌片と、前記燃料供給管に係合させて、前記分岐管の軸心に対する回動を阻止するストッパ手段と、前記フューエルインジェクタの凸部または凹部の一方を、前記分岐管の軸心方向に嵌合する凹部または凸部の他方とを有するクリップを備え、前記クリップの挟持舌片を前記分岐管の周面に挟持させるとともに、前記ストッパ手段を前記燃料供給管に係合させ、前記フューエルインジェクタの前記凸部または凹部の一方を前記クリップの凹部または凸部の他方に嵌合させ、前記フューエルインジェクタの前記分岐管の軸心に対する回動方向の位置決めをしたことを特徴とする。
この本発明によれば、クリップの挟持舌片を分岐管に挟持させ、ストッパ手段によって燃料供給管に係合させるだけなので、従来のように燃料供給管を挟持するための挟持片を形成する必要がなく、クリップの分岐管の軸心方向の長さが短くて済み、かつ、幅方向の広さが狭くて済むため、クリップがコンパクトになる。
また、上記本発明によれば、分岐管に保持させたクリップによってフューエルインジェクタの回動が阻止される、即ち、フューエルインジェクタの燃料供給管への保持距離が短いので、フューエルインジェクタが確実に保持される。
更に、上記本発明によれば、プレスによって形成された２部品を互いに組付けて構成される燃料供給管の場合には、燃料供給管に組付け誤差が生じる場合があるが、クリップを分岐管に保持させることとし、燃料供給管を装着したクリップの回動阻止のみに燃料供給管を利用することとした本発明においては、燃料供給管の組付け誤差の影響は少ない。
また、本発明に係るフューエルインジェクタの位置決め構造は、上記発明において、上記ストッパ手段として、上記クリップにストッパ片を配設し、該ストッパ片を上記燃料供給管に当接させることによって、上記クリップの回動を阻止させるようにしたことを特徴とする。
この本発明によれば、ストッパ手段として、クリップにストッパ片を形成するだけでよいので、構成が単純に成り、安価になる。
更に、本発明に係るフューエルインジェクタの位置決め構造は、上記発明において、上記燃料供給管が箱状に形成され、上記ストッパ片を上記燃料供給管の側面に当接させることによって、上記クリップの回動を阻止させるようにしたことを特徴とする。
この本発明によれば、クリップのストッパ片が燃料供給管の平面部で当接するので、より安定した回動防止が行える。
また、本発明に係るフューエルインジェクタの位置決め構造は、上記発明において、上記ストッパ手段として、上記クリップに凸部または凹部を形成するとともに、上記燃料供給管に凹部または凸部を形成し、上記クリップの凸部または凹部を上記燃料供給管の凹部または凸部を係合させることによって、上記クリップの回動を阻止させるようにしたことを特徴とする。
この本発明によれば、クリップを燃料供給管に凹凸によって係合させて、クリップの回動を阻止するので、クリップの取り付けが容易であり、しかも確実に回動を阻止することができる。
また、本発明に係るフューエルインジェクタの位置決め構造は、上記発明において、上記クリップが型成形によって一体成形されていることを特徴とする。
この本発明によれば、２つの割型によってクリップが成形できるので、安価に作成できる。In order to achieve the above-described object, the fuel injector positioning structure according to the present invention is a fuel injector positioning structure in which a fuel injector is inserted and attached to a branch pipe formed in a fuel supply pipe. One of a convex portion and a concave portion is formed on the surface, and a clamping tongue piece for clamping the peripheral surface of the branch pipe, and a stopper that is engaged with the fuel supply pipe to prevent rotation with respect to the axis of the branch pipe And a clip having one of the convex portion or the concave portion of the fuel injector and the other of the concave portion or the convex portion that fits in the axial direction of the branch pipe, and the clamping tongue piece of the clip is attached to the branch pipe The stopper means is engaged with the fuel supply pipe and the convex portion of the fuel injector is held between the peripheral surface and the fuel injector. Is fitted to one of the recesses in the other recesses or protrusions of the clip, characterized in that the positioning in the rotational direction with respect to the axis of the branch pipe of the fuel injector.
According to the present invention, the holding tongue piece of the clip is simply held between the branch pipe and engaged with the fuel supply pipe by the stopper means, so that it is necessary to form a holding piece for holding the fuel supply pipe as in the prior art. The clip can be made compact because the length of the branch pipe in the axial center direction is short and the width in the width direction is narrow.
Further, according to the present invention, the rotation of the fuel injector is prevented by the clip held by the branch pipe, that is, the fuel injector is securely held because the holding distance of the fuel injector to the fuel supply pipe is short. The
Further, according to the present invention, in the case of a fuel supply pipe constructed by assembling two parts formed by pressing, an assembly error may occur in the fuel supply pipe. In the present invention in which the fuel supply pipe is used only to prevent rotation of the clip equipped with the fuel supply pipe, the influence of the assembly error of the fuel supply pipe is small.
In the fuel injector positioning structure according to the present invention, in the above invention, as the stopper means, a stopper piece is disposed on the clip, and the stopper piece is brought into contact with the fuel supply pipe, whereby the clip of the clip is arranged. It is characterized by preventing the rotation.
According to the present invention, since it is only necessary to form the stopper piece on the clip as the stopper means, the configuration is simplified and the cost is reduced.
Further, in the fuel injector positioning structure according to the present invention, in the above invention, the fuel supply pipe is formed in a box shape, and the stopper piece is brought into contact with a side surface of the fuel supply pipe, thereby rotating the clip. It is characterized by preventing the above.
According to the present invention, since the stopper piece of the clip comes into contact with the flat portion of the fuel supply pipe, more stable rotation prevention can be performed.
In the fuel injector positioning structure according to the present invention, in the above invention, as the stopper means, a convex portion or a concave portion is formed in the clip, and a concave portion or a convex portion is formed in the fuel supply pipe. The rotation of the clip is prevented by engaging the convex portion or the concave portion with the concave portion or the convex portion of the fuel supply pipe.
According to the present invention, since the clip is engaged with the fuel supply pipe by the unevenness to prevent the rotation of the clip, the clip can be easily attached and the rotation can be reliably prevented.
The fuel injector positioning structure according to the present invention is characterized in that, in the above invention, the clip is integrally formed by mold forming.
According to the present invention, a clip can be formed by two split molds, so that it can be produced at low cost.

第１図は、本発明に係るフューエルインジェクタの位置決め構造を備えた燃料供給管の斜視図である。第２図は、第１図におけるクリップの拡大斜視図、第３図は、第１図における矢視Ａの部分拡大斜視図、第４図は、第１図における矢視Ａに相当する変形例を示した部分拡大斜視図、第５図は、第１図における矢視Ｂの部分拡大斜視図である。第６図は、本発明に係るフューエルインジェクタの位置決め構造におけるストッパ手段の他の形態を示した部分拡大斜視図である。   FIG. 1 is a perspective view of a fuel supply pipe provided with a fuel injector positioning structure according to the present invention. 2 is an enlarged perspective view of the clip in FIG. 1, FIG. 3 is a partially enlarged perspective view of the arrow A in FIG. 1, and FIG. 4 is a modification corresponding to the arrow A in FIG. FIG. 5 is a partially enlarged perspective view taken along arrow B in FIG. FIG. 6 is a partially enlarged perspective view showing another embodiment of the stopper means in the fuel injector positioning structure according to the present invention.

以下、上記した本発明に係るフューエルインジェクタの位置決め構造の実施の形態を、図面を参照しながら詳細に説明する。
なお、この実施の形態では、燃料供給管を、実際の取付け状態と上下反対の姿勢で図面に描いており、以下の用語の「上下」は、図面に描かれた状態で表現する。
第１図に示す燃料供給管１は、プレスによって形成され、上壁２ａおよびその周縁に下方に向けて形成された側壁２ｂによって構成された長尺の燃料供給管体上部部分２と、同じくプレスによって形成され、底壁３ａおよびその周縁に上方に向けて形成された側壁３ｂによって構成された長尺の燃料供給管体下部部分３とを、互いに嵌合させてロウ付けして一体化されている。
そして、上記燃料供給管１を構成する上部部分２の上壁２ａには、３つの孔（図示せず）が形成され、その孔の周縁に、ラッパ状先端部を有する分岐管４の基端がそれぞれロウ付けされている。
第１図に示すクリップ５は、弾性を有する合成樹脂によって型成形により一体成形されており、第２図に詳細に示すように、上記分岐管４を囲むように円弧状に形成された挟持舌片６，６と、それらの挟持舌片６，６の上縁から半径方向外方に、それぞれ挟持舌片６、６の先端と同じ方向に張り出し、先端が上方へ向けて形成されたフランジ片７，７とを有している。そして、前記フランジ片７，７によって、それらの間に凹部８が画成されている。さらに、このクリップ５は、ストッパ手段９として、前記挟持舌片６，６の基端部から下方へ向けてストッパ片９ａが形成されている。
第１図に示すフューエルインジェクタ１０は、本体の中間部に合成樹脂製の管状体１１を有し、該管状体１１の周面に、外郭が馬蹄形を成すフランジ部１２を備え、該フランジ部１２の側面を成す平面部に略直方形のコネクタ１３を備えている。
このように構成された燃料供給管１、クリップ５およびフューエルインジェクタ１０は、以下のようにして組付けられる。
先ず、燃料供給管１の分岐管４に、クリップ５の挟持舌片６，６を装着する。この状態におけるクリップ５は、挟持舌片６，６によって分岐管４に保持され、第３図に示すように、ストッパ片９ａが燃料供給管１の側壁２ｂに当接することによって、分岐管４の軸心に対する回動方向の移動が阻止される。
なお、ストッパ片９ａが当接する燃料供給管１の側壁２ｂの面が、分岐管４とほぼ同心円状に湾曲している場合には、第４図に示すように、燃料供給管１の側壁３ｂの上端に突起１４を形成し、その突起１４にストッパ片９ａの側端を当接して、クリップ５の分岐管４の軸心に対する回動方向の移動が阻止されるようにすればよい。
次いで、フューエルインジェクタ１０の基端が分岐管４に挿嵌される。この状態におけるフューエルインジェクタ１０は、周面に配設された凸部（フランジ部１２）がクリップ５のフランジ片７，７によって画成される凹部８に落とし込まれ、それによってフューエルインジェクタ１０の分岐管４の軸心に対する回動方向の移動が阻止される。
なお、上記実施の形態では、フューエルインジェクタ１０の凸部として、フランジ部１２を利用しているが、例えば、コネクタ１３等の他の機能部の凸部を利用してもよく、特別に形成してもよい。
また、上記実施の形態では、クリップ５に凹部８を形成し、そこにフューエルインジェクタ１０の凸部（フランジ部１２）を挿嵌させているが、クリップ５に凸部を形成し、フューエルインジェクタ１０に凹部を形成してもよい。
また、上記実施の形態では、ストッパ手段９として、クリップ５にストッパ片９ａを形成し、そのストッパ片９ａを燃料供給管１の側面に当接させることによって、クリップ５の回動を阻止しているが、第６図に示すように、ストッパ手段９として、燃料供給管１の上面２ａに凸部９ｂを形成するとともに、クリップ５の下面に凹部９ｃを形成し、クリップ５の凹部９ｃを燃料供給管１の凸部９ｂに嵌合させることによって、クリップ５の回動を阻止してもよい。Hereinafter, an embodiment of a fuel injector positioning structure according to the present invention will be described in detail with reference to the drawings.
In this embodiment, the fuel supply pipe is drawn on the drawing in a posture opposite to the actual mounting state, and the following terms “up and down” are expressed in the state drawn on the drawing.
A fuel supply pipe 1 shown in FIG. 1 is formed by pressing, and an upper portion 2 of a long fuel supply pipe body constituted by an upper wall 2a and a side wall 2b formed downward on the periphery of the upper wall 2a. Are formed by the bottom wall 3a and the side wall 3b formed upward on the periphery of the bottom wall 3a, and the lower portion 3 of the long fuel supply pipe body is fitted together and brazed to be integrated. Yes.
The upper wall 2a of the upper portion 2 constituting the fuel supply pipe 1 is formed with three holes (not shown), and the base end of the branch pipe 4 having a trumpet-shaped tip at the periphery of the hole. Are brazed.
The clip 5 shown in FIG. 1 is integrally formed by molding with a synthetic resin having elasticity, and, as shown in detail in FIG. 2, a clamping tongue formed in an arc shape so as to surround the branch pipe 4 Flange pieces formed so as to protrude from the upper edges of the pieces 6 and 6 and the pinching tongue pieces 6 and 6 radially outward in the same direction as the tips of the pinching tongue pieces 6 and 6, respectively. 7 and 7. The flange pieces 7 and 7 define a recess 8 between them. Further, the clip 5 is formed with a stopper piece 9a as a stopper means 9 from the base end portion of the clamping tongue pieces 6 and 6 downward.
A fuel injector 10 shown in FIG. 1 has a tubular body 11 made of a synthetic resin at an intermediate portion of a main body, and includes a flange portion 12 whose outer shell forms a horseshoe shape on the peripheral surface of the tubular body 11. A substantially rectangular connector 13 is provided on the flat surface portion forming the side surface.
The fuel supply pipe 1, the clip 5 and the fuel injector 10 thus configured are assembled as follows.
First, the clamping tongue pieces 6 and 6 of the clip 5 are attached to the branch pipe 4 of the fuel supply pipe 1. The clip 5 in this state is held on the branch pipe 4 by the clamping tongue pieces 6 and 6, and the stopper piece 9a abuts against the side wall 2b of the fuel supply pipe 1 as shown in FIG. Movement in the rotational direction relative to the axis is prevented.
If the surface of the side wall 2b of the fuel supply pipe 1 with which the stopper piece 9a abuts is curved substantially concentrically with the branch pipe 4, the side wall 3b of the fuel supply pipe 1 is shown in FIG. A protrusion 14 may be formed at the upper end of the stopper, and the side end of the stopper piece 9a may be brought into contact with the protrusion 14 so that the movement of the clip 5 in the rotational direction relative to the axis of the branch pipe 4 is prevented.
Next, the base end of the fuel injector 10 is inserted into the branch pipe 4. In the fuel injector 10 in this state, the convex portion (flange portion 12) disposed on the peripheral surface is dropped into the concave portion 8 defined by the flange pieces 7, 7 of the clip 5, thereby branching the fuel injector 10. Movement in the rotational direction relative to the axis of the tube 4 is prevented.
In the above-described embodiment, the flange portion 12 is used as the convex portion of the fuel injector 10. However, for example, the convex portion of another functional portion such as the connector 13 may be used, and it is specially formed. May be.
Moreover, in the said embodiment, although the recessed part 8 is formed in the clip 5 and the convex part (flange part 12) of the fuel injector 10 is inserted there, the convex part is formed in the clip 5 and the fuel injector 10 is formed. You may form a recessed part in this.
In the above embodiment, as the stopper means 9, the stopper piece 9 a is formed on the clip 5, and the stopper piece 9 a is brought into contact with the side surface of the fuel supply pipe 1 to prevent the clip 5 from rotating. However, as shown in FIG. 6, as the stopper means 9, a convex portion 9 b is formed on the upper surface 2 a of the fuel supply pipe 1, and a concave portion 9 c is formed on the lower surface of the clip 5. The clip 5 may be prevented from rotating by being fitted to the convex portion 9 b of the supply pipe 1.

以上に説明した本発明に係るフューエルインジェクタの位置決め構造によれば、フューエルインジェクタの保持がより確実に行なえ、コンパクトなクリップの使用が可能であり、しかもクリップの型成形が容易なものとなる。そのため、本発明は、燃料供給管に形成した分岐管にフューエルインジェクタを挿嵌し、クリップでフューエルインジェクタの回動方向に対する位置決めを行う構造において、広く利用することができる。   According to the fuel injector positioning structure according to the present invention described above, the fuel injector can be more reliably held, a compact clip can be used, and the clip can be easily molded. Therefore, the present invention can be widely used in a structure in which a fuel injector is inserted into a branch pipe formed in a fuel supply pipe and the fuel injector is positioned with respect to the rotation direction with a clip.

【０００３】
の位置決め構造は、燃料供給管に形成した分岐管にフューエルインジェクタを挿嵌して取付けるフューエルインジェクタの位置決め構造において、前記フューエルインジェクタの中間部周面に凸部を形成するとともに、前記分岐管の周面を挟持するＣ型円弧状の挟持舌片と、該挟持舌片の上縁左右から外方にそれぞれ挟持舌片の先端と同じ方向に張り出し、それらの間に前記フューエルインジェクタの凸部を嵌合する凹部が画成されたフランジ片と、前記燃料供給管に当接し、前記分岐管の軸心に対する回動を阻止する前記挟持舌片の基端部から下方に向けて形成されたストッパ片とを有する合成樹脂によって型成形により一体成形されたクリップを備え、前記クリップの挟持舌片を前記分岐管の周面に挟持させるとともに、前記クリップのストッパ片を前記燃料供給管に当接させ、前記フューエルインジェクタに形成された凸部を前記クリップのフランジ片間の凹部に嵌合させて、前記フューエルインジェクタの前記分岐管の軸心に対する回動方向の位置決めをしたことを特徴とする。
この本発明によれば、クリップの挟持舌片を分岐管に挟持させ、ストッパ片を燃料供給管に当接させるだけなので、従来のように燃料供給管を挟持するための挟持片を形成する必要がなく、クリップの分岐管の軸心方向の長さが短くて済み、かつ、幅方向の広さが狭くて済むため、クリップがコンパクトになる。
また、上記本発明によれば、分岐管に保持させたクリップによってフューエルインジェクタの回動が阻止される、即ち、フューエルインジェクタの燃料供給管への保持距離が短いので、フューエルインジェクタが確実に保持される。
更に、上記本発明によれば、プレスによって形成された２部品を互いに組付けて構成される燃料供給管の場合には、燃料供給管に組付け誤差が生じる場合があるが、クリップを分岐管に保持させることとし、燃料[0003]
In the positioning structure of the fuel injector, in which the fuel injector is inserted into and attached to the branch pipe formed in the fuel supply pipe, a convex portion is formed on the peripheral surface of the intermediate portion of the fuel injector, and the circumference of the branch pipe is A C-shaped arc-shaped clamping tongue piece for clamping the surface, and the upper edge of the clamping tongue piece outwardly projecting in the same direction as the tip of the clamping tongue piece, and the convex portion of the fuel injector is fitted between them A flange piece having a concavity defined therein, and a stopper piece formed downward from a base end portion of the clamping tongue piece that contacts the fuel supply pipe and prevents rotation with respect to the axis of the branch pipe And a clip integrally formed by molding using a synthetic resin, and the clip holding tongue piece is clamped on the peripheral surface of the branch pipe, and the clip A topper piece is brought into contact with the fuel supply pipe, and a convex part formed on the fuel injector is fitted into a concave part between flange pieces of the clip so that the fuel injector rotates in the direction of the axis of the branch pipe. It is characterized by having been positioned.
According to the present invention, the clip clamping tongue piece is clamped by the branch pipe, and the stopper piece is merely brought into contact with the fuel supply pipe. Therefore, it is necessary to form a clamp piece for clamping the fuel supply pipe as in the conventional case. The clip can be made compact because the length of the branch pipe in the axial center direction is short and the width in the width direction is narrow.
Further, according to the present invention, the rotation of the fuel injector is prevented by the clip held by the branch pipe, that is, the fuel injector is securely held because the holding distance of the fuel injector to the fuel supply pipe is short. The
Further, according to the present invention, in the case of a fuel supply pipe constructed by assembling two parts formed by pressing, an assembly error may occur in the fuel supply pipe. And let the fuel hold

【０００４】
供給管を装着したクリップの回動阻止のみに利用することとした本発明においては、燃料供給管の組付け誤差の影響は少ない。
また、本発明に係るフューエルインジェクタの位置決め構造は、上記発明において、上記フューエルインジェクタの凸部を、外郭が馬蹄形を成すフランジ部としたことを特徴とする。
この本発明によれば、フューエルインジェクタの周面に配設された外郭が馬蹄形を成すフランジ部がクリップのフランジ片間の凹部に嵌合されるため、係合が確実なものとなる。
更に、本発明に係るフューエルインジェクタの位置決め構造は、上記発明において、上記燃料供給管が箱状に形成され、上記ストッパ片を上記燃料供給管の側面に当接させることによって、上記クリップの回動を阻止させるようにしたことを特徴とする。
この本発明によれば、クリップのストッパ片が燃料供給管の平面部で当接するので、より安定した回動防止が行える。[0004]
In the present invention, which is used only for preventing the rotation of the clip equipped with the supply pipe, the influence of the assembly error of the fuel supply pipe is small.
Further, the fuel injector positioning structure according to the present invention is characterized in that, in the above-mentioned invention, the convex portion of the fuel injector is a flange portion whose outer shell forms a horseshoe shape.
According to the present invention, since the outer portion disposed on the peripheral surface of the fuel injector has a horseshoe-shaped flange portion fitted into the recess between the flange pieces of the clip, the engagement is ensured.
Further, in the fuel injector positioning structure according to the present invention, in the above invention, the fuel supply pipe is formed in a box shape, and the stopper piece is brought into contact with a side surface of the fuel supply pipe, thereby rotating the clip. It is characterized by preventing the above.
According to the present invention, since the stopper piece of the clip comes into contact with the flat portion of the fuel supply pipe, more stable rotation prevention can be performed.

Claims (5)

燃料供給管に形成した分岐管にフューエルインジェクタを挿嵌して取付けるフューエルインジェクタの位置決め構造において、
前記フューエルインジェクタの中間部周面に凸部または凹部の一方を形成するとともに、前記分岐管の周面を挟持する挟持舌片と、前記燃料供給管に係合させて、前記分岐管の軸心に対する回動を阻止するストッパ手段と、前記フューエルインジェクタの凸部または凹部の一方を、前記分岐管の軸心方向に嵌合する凹部または凸部の他方とを有するクリップを備え、前記クリップの挟持舌片を前記分岐管の周面に挟持させるとともに、前記ストッパ手段を前記燃料供給管に係合させ、前記フューエルインジェクタの前記凸部または凹部の一方を前記クリップの凹部または凸部の他方に嵌合させ、前記フューエルインジェクタの前記分岐管の軸心に対する回動方向の位置決めをしたことを特徴とする、フューエルインジェクタの位置決め構造。In a fuel injector positioning structure in which a fuel injector is inserted and attached to a branch pipe formed in a fuel supply pipe,
One of a convex portion or a concave portion is formed on the peripheral surface of the intermediate portion of the fuel injector, and a sandwiching tongue piece for sandwiching the peripheral surface of the branch pipe is engaged with the fuel supply pipe, so that the axis of the branch pipe A clip having stopper means for preventing rotation with respect to the other and one of the convex portion or the concave portion of the fuel injector and the other of the concave portion or the convex portion that fits in the axial direction of the branch pipe. The tongue piece is sandwiched between the peripheral surfaces of the branch pipe, the stopper means is engaged with the fuel supply pipe, and one of the convex portion or the concave portion of the fuel injector is fitted to the other concave portion or the convex portion of the clip. The fuel injector positioning structure is characterized in that the fuel injector is positioned in the rotational direction with respect to the axis of the branch pipe. 前記ストッパ手段として、前記クリップにストッパ片を配設し、該ストッパ片を前記燃料供給管に当接させることによって、前記クリップの回動を阻止させるようにしたことを特徴とする、請求の範囲１に記載のフューエルインジェクタの位置決め構造。 A stopper piece is provided on the clip as the stopper means, and the stopper piece is brought into contact with the fuel supply pipe to prevent the clip from rotating. 2. A fuel injector positioning structure according to 1. 前記燃料供給管が箱状に形成され、前記ストッパ片を前記燃料供給管の側面に当接させることによって、前記クリップの回動を阻止させるようにしたことを特徴とする、請求の範囲２に記載のフューエルインジェクタの位置決め構造。 3. The fuel supply pipe according to claim 2, wherein the fuel supply pipe is formed in a box shape, and the stopper piece is brought into contact with a side surface of the fuel supply pipe to prevent rotation of the clip. The fuel injector positioning structure described. 前記ストッパ手段として、前記クリップに凸部または凹部を形成するとともに、前記燃料供給管に凹部または凸部を形成し、前記クリップの凸部または凹部を前記燃料供給管の凹部または凸部を係合させることによって、前記クリップの回動を阻止させるようにしたことを特徴とする、請求の範囲１に記載のフューエルインジェクタの位置決め構造。 As the stopper means, a convex portion or a concave portion is formed in the clip, a concave portion or a convex portion is formed in the fuel supply pipe, and the convex portion or the concave portion of the clip is engaged with the concave portion or the convex portion of the fuel supply pipe. 2. The fuel injector positioning structure according to claim 1, wherein the clip is prevented from rotating. 前記クリップが型成形によって一体成形されていることを特徴とする、請求の範囲１に記載のフューエルインジェクタの位置決め構造。 2. The fuel injector positioning structure according to claim 1, wherein the clip is integrally formed by molding.
JP2007522246A 2005-06-24 2006-06-07 Fuel injector positioning structure Expired - Fee Related JP4157909B2 (en)

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JP5887154B2 (en) * 2011-03-10 2016-03-16 株式会社オティックス Fuel delivery pipe
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JP2535132Y2 (en) * 1991-02-20 1997-05-07 ダイハツ工業株式会社 Fuel injector mounting device
US5074269A (en) * 1991-04-29 1991-12-24 Chrysler Corporation Anti-rotation fuel injector clip
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