JP2006266131A - Retaining member for fuel injection valve - Google Patents

Retaining member for fuel injection valve Download PDF

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Publication number
JP2006266131A
JP2006266131A JP2005083606A JP2005083606A JP2006266131A JP 2006266131 A JP2006266131 A JP 2006266131A JP 2005083606 A JP2005083606 A JP 2005083606A JP 2005083606 A JP2005083606 A JP 2005083606A JP 2006266131 A JP2006266131 A JP 2006266131A
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Prior art keywords
fuel injection
injection valve
fuel
mounting boss
cap
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JP2005083606A
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JP4125731B2 (en
Inventor
Hiroshige Akiyama
裕茂 秋山
Ariteru Fujino
有輝 藤野
Takashi Goto
崇 後藤
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Keihin Corp
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Keihin Corp
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Priority to JP2005083606A priority Critical patent/JP4125731B2/en
Application filed by Keihin Corp filed Critical Keihin Corp
Priority to PCT/JP2006/305209 priority patent/WO2006100995A1/en
Priority to CN2006800093194A priority patent/CN101146993B/en
Priority to ES06729206T priority patent/ES2421918T3/en
Priority to EP06729206.0A priority patent/EP1862667B1/en
Priority to CN201110325259.XA priority patent/CN102410120B/en
Priority to BRPI0607319-0A priority patent/BRPI0607319B1/en
Publication of JP2006266131A publication Critical patent/JP2006266131A/en
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Publication of JP4125731B2 publication Critical patent/JP4125731B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To secure the liquid-tightness of a fitting part between the fuel inlet part and the cap part of a fuel injection valve by preventing the thermal shrinkage of a mounting boss part from affecting the inner peripheral surface of the cap part in forming a retaining member for the fuel injection valve. <P>SOLUTION: This retaining member retains, on a throttle body 1, the fuel injection valve 10 into which a fuel injection part 11 at one end part is inserted into a mounting hole 4 formed in the throttle body 1. The retaining member is formed by integrally forming a fuel joint part 27 and a mounting boss part 26 by using a synthetic resin so that the fuel joint part 27 formed by connecting a fuel feed pipe 33 to the cap part 21 fitted, liquid-tight, to the outer periphery of a fuel inlet part 12 at the other end part of the fuel injection valve 10 can be integrally connected to the mounting boss part 26 integrally connected to the throttle body 1. The mounting boss part 26 is connected to the cap part 21 at the portion thereof axially apart from a fitting surface 22 of the inner periphery of the cap part 21 to the fuel inlet part 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は，吸気路部材に設けられた取り付け孔に一端部の燃料噴射部を挿入した燃料噴射弁を吸気路部材に保持するものであって，燃料噴射弁の他端部の燃料入口部外周に液密に嵌装されるキャップ部に，内部がこのキャップ部内と連通する燃料ジョイント部と，前記吸気路部材に結合される取り付けボス部とが一体に連結されるように，これらを合成樹脂により一体成形してなる，燃料噴射弁用保持部材の改良に関する。   The present invention holds a fuel injection valve in which a fuel injection portion at one end is inserted into an attachment hole provided in an intake passage member, on the intake passage member, and has a fuel inlet portion outer periphery at the other end of the fuel injection valve. The fuel joint portion, which is in fluid communication with the inside of the cap portion, and the mounting boss portion coupled to the intake passage member are integrally connected to the cap portion that is liquid-tightly fitted to the cap portion. It is related with the improvement of the fuel injection valve holding member formed by integral molding.

かゝる燃料噴射弁用保持部材は，下記特許文献１に開示されるように既に知られている。
特開２０００−５４９３７号公報 Such a fuel injection valve holding member is already known as disclosed in Patent Document 1 below.
JP 2000-54937 A

従来のかゝる燃料噴射弁用保持部材では，キャップ部の嵌合面に対応する外周面に取り付けボスが突設されているため，その成形時，取り付けボス部の熱収縮の影響によりキャップ部の嵌合面に歪みが発生する可能性があり，その歪みの発生によれば，燃料噴射弁の燃料入口部とキャップ部との嵌合部の液密性の信頼性が損なわれることになる。   In the conventional fuel injection valve holding member, since the mounting boss protrudes from the outer peripheral surface corresponding to the fitting surface of the cap portion, the cap portion of the cap portion is affected by the heat shrinkage of the mounting boss portion during molding. There is a possibility that the fitting surface may be distorted. If the distortion occurs, the reliability of the liquid tightness of the fitting portion between the fuel inlet portion and the cap portion of the fuel injection valve is impaired.

本発明は，かゝる事情に鑑みてなされたもので，成形時，取り付けボス部の熱収縮がキャップ部の内周面に影響しなようにして，燃料噴射弁の燃料入口部とキャップ部との嵌合部の液密性を確保し得る燃料噴射弁用保持部材を提供することを目的とする。   The present invention has been made in view of such circumstances, and at the time of molding, the heat shrinkage of the mounting boss portion does not affect the inner peripheral surface of the cap portion, so that the fuel inlet portion and the cap portion of the fuel injection valve are provided. It is an object of the present invention to provide a fuel injection valve holding member capable of securing the liquid tightness of the fitting portion.

上記目的を達成するために，本発明は，吸気路部材に設けられた取り付け孔に一端部の燃料噴射部を挿入した燃料噴射弁を吸気路部材に保持するものであって，燃料噴射弁の他端部の燃料入口部外周に液密に嵌装されるキャップ部に，内部がこのキャップ部内と連通する燃料ジョイント部と，前記吸気路部材に結合される取り付けボス部とが一体に連結されるように，これらを合成樹脂により一体成形してなる，燃料噴射弁用保持部材において，前記取り付けボス部を，前記キャップ部内周の，前記燃料入口部との嵌合面から軸方向に離れた部位でキャップ部に連結したことを第１の特徴とする。   In order to achieve the above object, the present invention holds a fuel injection valve having one end of a fuel injection portion inserted into a mounting hole provided in an intake passage member. A fuel joint portion whose inside communicates with the inside of the cap portion and a mounting boss portion coupled to the intake passage member are integrally connected to a cap portion that is liquid-tightly fitted to the outer periphery of the fuel inlet portion at the other end portion. As described above, in the fuel injection valve holding member formed by integrally molding these with synthetic resin, the mounting boss portion is separated from the fitting surface of the inner periphery of the cap portion with the fuel inlet portion in the axial direction. The first feature is that the portion is connected to the cap portion.

尚，前記吸気路部材は，後述する本発明の実施例中のスロットルボディ１に対応する。   The intake passage member corresponds to a throttle body 1 in an embodiment of the present invention described later.

また本発明は，第１の特徴に加えて，一対の取り付けボス部と一本の燃料ジョイント部とを，キャップ部の周りに分散して配置したことを第２の特徴とする。   In addition to the first feature, the present invention has a second feature that a pair of mounting boss portions and one fuel joint portion are distributed around the cap portion.

さらに本発明は，第１の特徴に加えて，キャップ部及び取り付けボス部間の連結部の剛性を，キャップ部の剛性より弱くしたことを第３の特徴とする。   Furthermore, in addition to the first feature, the third feature of the present invention is that the rigidity of the connecting portion between the cap portion and the mounting boss portion is weaker than the rigidity of the cap portion.

本発明の第１の特徴によれば，取り付けボス部を，キャップ部内周の，燃料入口部との嵌合面から軸方向に離れた部位でキャップ部に連結したので，保持部材の成形時，取り付けボス部に熱収縮が生じることがあっても，その影響が上記嵌合面まで波及することはない。したがって常に歪みのない良好な嵌合面を確保し得るから，この嵌合面と，これにシールリングを介して嵌合する燃料入口部との間を常に良好なシール状態に保持し，高圧燃料のリークを確実に防ぐことができる。   According to the first feature of the present invention, the mounting boss portion is connected to the cap portion at a portion in the axial direction away from the fitting surface with the fuel inlet portion on the inner periphery of the cap portion. Even if heat shrinkage occurs in the mounting boss, the effect does not reach the mating surface. Therefore, since a good fitting surface without distortion can always be secured, a good sealing state is always maintained between this fitting surface and the fuel inlet part fitted to this through a seal ring. Can be surely prevented.

また本発明の第２の特徴によれば，一対の取り付けボス部と一本の燃料ジョイント部とを，キャップ部の周りに分散して配置したので，メンテナンス時，保持部材のスロットルボディへの取り付け状態で燃料ジョイント部に対して燃料供給管を脱着する際，燃料ジョイント部にかかる荷重をキャップ部を介して両取り付けボス部にバランス良く分散させることができ，これにより両取り付けボス部，延いては保持部材の小型，軽量化が可能となる。   According to the second feature of the present invention, since the pair of mounting boss portions and one fuel joint portion are distributed around the cap portion, the holding member is attached to the throttle body during maintenance. When the fuel supply pipe is attached to or detached from the fuel joint part in a state, the load applied to the fuel joint part can be distributed to both attachment boss parts in a well-balanced manner through the cap part. Makes it possible to reduce the size and weight of the holding member.

さらに本発明の第３の特徴によれば，キャップ部及び取り付けボス部間の連結部の剛性を，キャップ部の剛性より弱くしたので，メンテナンス時，燃料ジョイント部への燃料供給管の脱着や受電用カプラへの給電用カプラの脱着を行うとき，キャップ部に大きな荷重が加わった場合，薄肉の連結部が適度に撓むことで，燃料噴射弁１０の燃料入口部とキャップ部との嵌合部に過大な荷重が加わることを防ぐことができ，したがって上記嵌合部の歪みを回避して，燃料のリークを防ぐことができる。   Further, according to the third feature of the present invention, the rigidity of the connecting portion between the cap portion and the mounting boss portion is made weaker than the rigidity of the cap portion. When a power supply coupler is attached to or detached from the coupler, if a large load is applied to the cap part, the thin connecting part bends appropriately, so that the fuel inlet part of the fuel injection valve 10 and the cap part are fitted. Therefore, it is possible to prevent an excessive load from being applied to the portion. Therefore, it is possible to avoid the distortion of the fitting portion and to prevent fuel leakage.

本発明の実施の形態を，添付図面に示す本発明の好適な実施例に基づいて以下に説明する。   Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

図１は本発明の第１実施例に係る保持部材を使用して燃料噴射弁をエンジンのスロットルボディに取り付けた状態を示す平面図，図２は図１の２−２線断面図，図３は図１の３矢視図，図４は前記保持部材の底面図，図５は図４の５−５線断面図，図６は図４の６矢視図，図７は本発明の第２実施例を示す断面図である。   1 is a plan view showing a state in which a fuel injection valve is attached to a throttle body of an engine using a holding member according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 4 is a bottom view of the holding member, FIG. 5 is a sectional view taken along line 5-5 in FIG. 4, FIG. 6 is a view taken in the direction of arrow 6 in FIG. 4, and FIG. It is sectional drawing which shows 2 Examples.

図１〜図３において，エンジンの吸気路部材としてのスロットルボディ１は，図示外のエンジンの吸気ポートに連なる吸気道２を有しており，この吸気道２を開閉してエンジンの吸気量を調節するバタフライ型のスロットル弁３の弁軸３ａがスロットルボディ１に回転自在に支承される。このスロットル弁３より下流側のスロットルボディ１の側壁には，図示外の吸気道２に開口する取り付け孔４と，この取り付け孔４の外端周縁から半径方向に広がる取り付け座５とが形成される。   1 to 3, a throttle body 1 as an intake passage member of an engine has an intake passage 2 connected to an intake port of an engine (not shown). The intake passage 2 is opened and closed to reduce the intake amount of the engine. A valve shaft 3 a of the butterfly throttle valve 3 to be adjusted is rotatably supported on the throttle body 1. On the side wall of the throttle body 1 on the downstream side of the throttle valve 3, there are formed a mounting hole 4 that opens to an intake passage 2 (not shown) and a mounting seat 5 that extends in the radial direction from the peripheral edge of the mounting hole 4. The

一方，このスロットルボディ１に取り付けられた電磁式燃料噴射弁１０は，一端部に燃料噴射部１１，他端部に燃料入口部１２を有しており，それらの中間部の外周には，内部のコイル部を埋封するようにモールド成形される合成樹脂製の外皮１３が形成され，この外皮１３には，その一側方に突出する受電用カプラ１４が一体成形される。   On the other hand, an electromagnetic fuel injection valve 10 attached to the throttle body 1 has a fuel injection part 11 at one end and a fuel inlet part 12 at the other end. An outer shell 13 made of synthetic resin is formed so as to be embedded in the coil portion, and a power receiving coupler 14 protruding to one side of the outer shell 13 is integrally formed.

燃料噴射部１１の根元の外周には，シール機能を持つゴム製のクッションリング１５が外皮１３の端面に当接するように装着される。また燃料入口部１２の外周に形成された環状のシール溝１６にはシール部材としてのＯリング１７が装着される。   A rubber cushion ring 15 having a sealing function is attached to the outer periphery of the base of the fuel injection unit 11 so as to contact the end surface of the outer skin 13. An O-ring 17 serving as a seal member is attached to the annular seal groove 16 formed on the outer periphery of the fuel inlet portion 12.

この燃料噴射弁１０の燃料噴射部１１は，スロットルボディ１の前記取り付け孔４に挿入され，クッションリング１５は前記取り付け座５に重ねられる。この燃料噴射弁１０は，クッションリング１５を圧縮するようにして，合成樹脂製の保持部材２０により保持される。   The fuel injection portion 11 of the fuel injection valve 10 is inserted into the mounting hole 4 of the throttle body 1, and the cushion ring 15 is overlapped with the mounting seat 5. The fuel injection valve 10 is held by a synthetic resin holding member 20 so as to compress the cushion ring 15.

この保持部材２０について，図１，図４〜図６を参照しながら説明する。   The holding member 20 will be described with reference to FIGS. 1 and 4 to 6.

保持部材２０は，円筒状のキャップ部２１を主体として備える。このキャップ部２１の内周面は，シリンダ状の嵌合面２２と，この嵌合面２２の入口側に形成されるテーパ状の案内面２３とで構成され，前記燃料噴射弁１０の燃料入口部１２が，この案内面２３を通して嵌合面２２に嵌入され，その嵌合面２２に前記Ｏリング１７が密接するようになっている。   The holding member 20 mainly includes a cylindrical cap portion 21. An inner peripheral surface of the cap portion 21 is composed of a cylindrical fitting surface 22 and a tapered guide surface 23 formed on the inlet side of the fitting surface 22, and a fuel inlet of the fuel injection valve 10. The portion 12 is fitted into the fitting surface 22 through the guide surface 23, and the O-ring 17 is in close contact with the fitting surface 22.

またキャップ部２１の天井部２１ａには，嵌合面２２の内端から半径方向内方に延びるストッパ段部２４と，このストッパ段部２４の中心部に位置して嵌合面２２側に開口する凹部２５とが形成され，そのストッパ段部２４に前記燃料入口部１２の端面が当接して，燃料入口部１２のキャップ部２１への挿入深さが規制されるようになっている。   The ceiling 21 a of the cap 21 has a stopper step 24 extending radially inward from the inner end of the fitting surface 22, and an opening on the fitting surface 22 side located at the center of the stopper step 24. The end portion of the fuel inlet portion 12 is brought into contact with the stopper step portion 24 so that the insertion depth of the fuel inlet portion 12 into the cap portion 21 is regulated.

さらに天井部２１ａには，その外側方に突出する一対の円筒状の取り付けボス部２６，２６と，一本の管状の燃料ジョイント部２７とが一体に形成される。両取り付けボス部２６，２６は，それらの軸線Ａ，Ａがキャップ部２１の軸線Ｂと平行するように配置されると共に，比較的薄い板状連結部２８を介してキャップ部２１の天井部２１ａに連結される。また管状の燃料ジョイント部２７は，その一部が天井部２１ａ上面の膨出部２７ａとなって，天井部２１ａの一側方に突出しており，この燃料ジョイント部２７の内部は，天井部２１ａ内面の前記凹部２５に連通する。上記膨出部２７ａと各取り付けボス部２６との間には，それらを連結するリブ２９，２９が形成される。   Further, a pair of cylindrical mounting boss portions 26, 26 projecting outward from the ceiling portion 21a and a single tubular fuel joint portion 27 are integrally formed. Both mounting bosses 26, 26 are arranged so that their axes A, A are parallel to the axis B of the cap part 21, and the ceiling part 21 a of the cap part 21 via a relatively thin plate-like connecting part 28. Connected to Further, a part of the tubular fuel joint portion 27 is a bulging portion 27a on the upper surface of the ceiling portion 21a and protrudes to one side of the ceiling portion 21a. The inside of the fuel joint portion 27 is the ceiling portion 21a. It communicates with the concave portion 25 on the inner surface. Ribs 29 and 29 are formed between the bulging portion 27a and each mounting boss portion 26 to connect them.

このようにして，一対の取り付けボス部２６，２６は，嵌合面２２から軸方向に離れた部位でキャップ部２１の天井部２１ａに連結される。またこれら取り付けボス部２６，２６は，保持部材２０の平面視で，それらの両軸線Ａ，Ａが，キャップ部２１の軸線Ｂを一頂点とする仮想三角形３０の他の二頂点上に来るように配置される。その際，各取り付けボス部２６の軸線Ａ及びキャップ部２１の軸線Ｂ間の距離は，略等しく設定される。また上記三角形３０の，キャップ部２１の軸線Ｂ側の頂角αは鈍角に設定される。そして燃料ジョイント部２７は，上記頂角αに対する対頂角βの範囲に配置される。また図１に示すように，燃料噴射弁１０に保持部材２０を装着したとき，燃料噴射弁１０は，その受電用カプラ１４が上記対頂角βの範囲に入るように回転方向位置は規制される。   In this way, the pair of attachment boss portions 26, 26 are connected to the ceiling portion 21 a of the cap portion 21 at a portion away from the fitting surface 22 in the axial direction. The mounting boss portions 26 and 26 are arranged such that both the axes A and A are on the other two vertices of the virtual triangle 30 having the axis B of the cap portion 21 as one vertex in a plan view of the holding member 20. Placed in. At that time, the distance between the axis A of each mounting boss portion 26 and the axis B of the cap portion 21 is set substantially equal. The apex angle α of the triangle 30 on the axis B side of the cap portion 21 is set to an obtuse angle. And the fuel joint part 27 is arrange | positioned in the range of the vertical angle (beta) with respect to the said vertical angle (alpha). As shown in FIG. 1, when the holding member 20 is attached to the fuel injection valve 10, the rotational direction position of the fuel injection valve 10 is regulated so that the power receiving coupler 14 falls within the range of the vertical angle β.

上記のようにキャップ部２１，キャップ部２１，取り付けボス部２６，２６及び燃料ジョイント部２７からなる保持部材２０は合成樹脂により一体成形され，各取り付けボス部２６の内周面には金属製のブッシュ３１が圧入もしくはモールド結合される。取り付けボス部２６，２６は，それぞれボルト３５，３５によりスロットルボディ１に固着されるようになっている。またキャップ部２１の外周面には位置決め突起３２が一体に突設され，この位置決め突起３２を基準にして，燃料噴射弁１０の受電用カプラ１４の位置を規制するようになっており，その規制により，燃料ジョイント部２７と受電用カプラ１４とは，それらの中心線Ｃ，Ｄがなす角度θが５０°以上となるように配置される
而して，燃料ジョイント部２７には図示外の燃料ポンプの吐出ポートに連なる燃料供給管３３が接続され，受電用カプラ１４には給電用カプラ３４が接続される。 As described above, the holding member 20 including the cap portion 21, the cap portion 21, the mounting boss portions 26 and 26, and the fuel joint portion 27 is integrally formed of synthetic resin, and the inner peripheral surface of each mounting boss portion 26 is made of metal. The bush 31 is press-fitted or molded. The mounting boss portions 26 and 26 are fixed to the throttle body 1 by bolts 35 and 35, respectively. A positioning projection 32 is integrally formed on the outer peripheral surface of the cap portion 21, and the position of the power receiving coupler 14 of the fuel injection valve 10 is regulated with reference to the positioning projection 32. Thus, the fuel joint portion 27 and the power receiving coupler 14 are arranged so that the angle θ formed by their center lines C and D is 50 ° or more. A fuel supply pipe 33 connected to the discharge port of the pump is connected, and a power feeding coupler 34 is connected to the power receiving coupler 14.

次に，この第１実施例の作用について説明する。   Next, the operation of the first embodiment will be described.

燃料噴射弁１０をスロットルボディ１に取り付けるに当たっては，保持部材２０のキャップ部２１内に，燃料噴射弁１０の燃料入口部１２を，その端面がストッパ段部２４に当接するまで押し込み，Ｏリング１７を嵌合面２２に密接させる。そして，燃料噴射弁１０の受電用カプラ１４と，保持部材２０の取り付けボス部２６，２６との関係位置を前述のように設定した状態で，燃料噴射弁１０の燃料噴射部１１をスロットルボディ１の取り付け孔４に挿入すると共に，クッションリング１５を取り付け座５に載せる。次いで取り付けボス部２６，２６をスロットルボディ１の所定箇所にボルト３５，３５により固着する。   In attaching the fuel injection valve 10 to the throttle body 1, the fuel inlet portion 12 of the fuel injection valve 10 is pushed into the cap portion 21 of the holding member 20 until the end surface thereof abuts against the stopper step portion 24. Is brought into close contact with the fitting surface 22. Then, with the relative position between the power receiving coupler 14 of the fuel injection valve 10 and the mounting boss portions 26 and 26 of the holding member 20 set as described above, the fuel injection portion 11 of the fuel injection valve 10 is connected to the throttle body 1. The cushion ring 15 is placed on the mounting seat 5. Next, the mounting boss portions 26 and 26 are fixed to predetermined portions of the throttle body 1 with bolts 35 and 35.

而して，ボルト３５，３５による取り付けボス部２６，２６のスロットルボディ１に対する緊締力が，キャップ部２１のストッパ段部２４から燃料噴射弁１０を介してクッションリング１５に圧縮力として作用し，その反発力により燃料噴射弁１０は弾性支持されることになる。   Thus, the tightening force of the mounting boss portions 26, 26 to the throttle body 1 by the bolts 35, 35 acts as a compressive force from the stopper step portion 24 of the cap portion 21 to the cushion ring 15 via the fuel injection valve 10. The fuel injection valve 10 is elastically supported by the repulsive force.

エンジンの運転中，図示外の燃料ポンプが吐出する高圧燃料は，燃料供給管３３から保持部材２０の燃料ジョイント部２７を通して燃料噴射弁１０に供給され，そして該弁１０の開弁時に燃料噴射部１１からエンジンの吸気ポートに向けて噴射される。   During operation of the engine, high-pressure fuel discharged from a fuel pump (not shown) is supplied from the fuel supply pipe 33 to the fuel injection valve 10 through the fuel joint portion 27 of the holding member 20, and the fuel injection portion is opened when the valve 10 is opened. 11 is injected toward the intake port of the engine.

ところで，合成樹脂製の保持部材２０では，一対の取り付けボス部２６，２６が，キャップ部２１の，燃料噴射弁１０の燃料入口部１２が嵌合する嵌合面２２から軸方向に離れた部位に連結されるので，保持部材２０の成形時，取り付けボス部２６，２６に熱収縮が生じることがあっても，その影響が上記嵌合面２２まで波及することはなく，したがって常に歪みのない良好な嵌合面２２を確保し得るから，この嵌合面２２と，これにＯリング１７を介して嵌合する燃料入口部１２との間を常に良好なシール状態に保持し，高圧燃料のリークを確実に防ぐことができる。   By the way, in the holding member 20 made of synthetic resin, the pair of mounting boss portions 26, 26 are portions separated from the fitting surface 22 of the cap portion 21 where the fuel inlet portion 12 of the fuel injection valve 10 is fitted in the axial direction. Therefore, even when the mounting boss portions 26 and 26 may be thermally contracted when the holding member 20 is molded, the influence does not reach the fitting surface 22 and therefore is not always distorted. Since a good fitting surface 22 can be secured, a good sealing state is always maintained between the fitting surface 22 and the fuel inlet portion 12 fitted to the fitting surface 22 via the O-ring 17 so that the high-pressure fuel Leakage can be surely prevented.

特に，両取り付けボス部２６，２６は，板状の連結部２８を介してキャップ部２１の天井部２１ａに連結されるので，板状の連結部２８において両取り付けボス部２６，２６の熱収縮の前記嵌合面２２への影響を効果的に遮断することができる。しかも両取り付けボス部２６，２６は，キャップ部２１の天井部２１ａ上面の膨出部２７ａとなった燃料ジョイント部２７の一部にリブ２９，２９を介して連結されるので，両取り付けボス部２６，２６と天井部２１ａとの連結強度を高め，燃料噴射弁１０の保持を強固に行うことができる。   In particular, since both the mounting boss portions 26 and 26 are connected to the ceiling portion 21a of the cap portion 21 via the plate-like connecting portion 28, the heat shrinkage of the both mounting boss portions 26 and 26 at the plate-like connecting portion 28 is achieved. Can be effectively blocked from affecting the fitting surface 22. Moreover, since both the mounting boss portions 26 and 26 are connected to a part of the fuel joint portion 27 which is the bulging portion 27a on the upper surface of the ceiling portion 21a of the cap portion 21 via the ribs 29 and 29, both mounting boss portions are provided. 26, 26 and the ceiling portion 21a can be increased in strength, and the fuel injection valve 10 can be firmly held.

また両取り付けボス部２６，２６は，保持部材２０の平面視で，それらの両軸線Ａ，Ａが，キャップ部２１の軸線Ｂを一頂点とする三角形３０の他の二頂点上に来るように配置され，上記三角形３０の，キャップ部２１の軸線Ｂ側の頂角αに対する対頂角βの範囲に燃料ジョイント部２７が配置されるので，一対の取り付けボス部２６，２６と一本の燃料ジョイント部２７とは，キャップ部２１の周りに分散して配置されることになり，メンテナンス時，保持部材２０のスロットルボディ１への取り付け状態で燃料ジョイント部２７に対して燃料供給管３３を脱着する際，その脱着を他物に干渉されることなく容易に行うことができ，しかも燃料ジョイント部２７にかかる荷重をキャップ部２１を介して両取り付けボス部２６，２６にバランス良く分散，支持させることができる。また燃料噴射弁１０の受電用カプラ１４も，上記対頂角βの範囲に配置されるので，メンテナンス時，燃料噴射弁１０を保持部材２０でスロットルボディ１に保持した状態で受電用カプラ１４に対して給電用カプラ３４を脱着する際，燃料噴射弁１０にかかる荷重をキャップ部２１を介して両取り付けボス部２６，２６にバランス良く分散，支持させることができる。これにより両取り付けボス部２６，２６，延いては保持部材２０の小型，軽量化が可能となる。このような効果は，特に上記頂角αを鈍角に設定することにより，一層顕著となる。   Further, both mounting boss portions 26 and 26 are arranged so that their two axes A and A are on the other two vertices of the triangle 30 having the axis B of the cap portion 21 as one vertex in a plan view of the holding member 20. Since the fuel joint portion 27 is disposed within the range of the vertical angle β of the triangle 30 with respect to the vertical angle α on the axis B side of the cap portion 21, the pair of mounting boss portions 26, 26 and one fuel joint portion are arranged. 27 is distributed around the cap portion 21, and during maintenance, when the fuel supply pipe 33 is attached to and detached from the fuel joint portion 27 with the holding member 20 attached to the throttle body 1. The attachment / detachment can be easily performed without interference with other objects, and the load applied to the fuel joint portion 27 is balanced between the mounting boss portions 26 and 26 via the cap portion 21. Can be well dispersed and supported. Further, since the power receiving coupler 14 of the fuel injection valve 10 is also arranged in the range of the vertical angle β, during maintenance, the fuel injection valve 10 is held on the throttle body 1 by the holding member 20 with respect to the power receiving coupler 14. When the power feeding coupler 34 is attached / detached, the load applied to the fuel injection valve 10 can be dispersed and supported in a balanced manner on both the mounting bosses 26, 26 via the cap part 21. As a result, it is possible to reduce the size and weight of the mounting boss portions 26 and 26 and the holding member 20. Such an effect becomes more prominent by setting the apex angle α to an obtuse angle.

また各取り付けボス部２６の軸線Ａ及びキャップ部２１の軸線Ｂ間の距離が略等しく設定されることで，各取り付けボス部２６は，略同条件でキャップ部２１を安定よく支持することができ，これによっても保持部材２０の小型，軽量化に資することができる。   Further, since the distance between the axis A of each mounting boss portion 26 and the axis B of the cap portion 21 is set substantially equal, each mounting boss portion 26 can stably support the cap portion 21 under substantially the same conditions. This also contributes to reducing the size and weight of the holding member 20.

また保持部材２０の燃料ジョイント部２７と，燃料噴射弁１０の受電用カプラ１４とは，それらの中心線Ｃ，Ｄがなす角度θが５０°以上となるように配置されるので，メンテナンス時，燃料ジョイント部２７への燃料供給管３３の脱着，並びに受電用カプラ１４への給電用カプラ３４の脱着を互いに干渉することなく容易に行うことができ，組立性の向上に寄与し得る。   Further, the fuel joint portion 27 of the holding member 20 and the power receiving coupler 14 of the fuel injection valve 10 are arranged so that the angle θ formed by their center lines C and D is 50 ° or more. The attachment / detachment of the fuel supply pipe 33 to / from the fuel joint portion 27 and the attachment / detachment of the feeding coupler 34 to / from the power receiving coupler 14 can be easily performed without interfering with each other, which can contribute to an improvement in assemblability.

次に，図７に示す本発明の第２実施例について説明する。   Next, a second embodiment of the present invention shown in FIG. 7 will be described.

この第２実施例では，合成樹脂製の保持部材２０において，キャップ部２１の案内面２３開口部周縁に，キャップ部２１より薄肉の連結部２８′を介して一対の取り付けボス２６，２６が連結されると共に，これら取り付けボス部２６，２６は，キャップ部２１の側方に小間隙を存して配置される。その他の構成は，前実施例と同様の構成であるので，図中，前実施例と対応する部分には同一の参照符号を付して，重複する説明を省略する。   In the second embodiment, in the holding member 20 made of synthetic resin, a pair of mounting bosses 26 and 26 are connected to the periphery of the opening of the guide surface 23 of the cap portion 21 via a connecting portion 28 ′ thinner than the cap portion 21. At the same time, the mounting boss portions 26 and 26 are arranged on the side of the cap portion 21 with a small gap. Since other configurations are the same as those of the previous embodiment, the same reference numerals are given to the portions corresponding to those of the previous embodiment in the figure, and redundant description is omitted.

この第２実施例においても，保持部材２０の合成樹脂により成形時には，取り付けボス部２６，２６に熱収縮が生じることがあっても，両取り付けボス部２６，２６の熱収縮がキャップ部２１内の嵌合面２２に影響することを薄肉の連結部２８′により遮断することができ，前実施例と同様に常に歪みのない良好な嵌合面２２を確保し得る。   Also in the second embodiment, even when the mounting boss portions 26 and 26 may be thermally contracted during molding by the synthetic resin of the holding member 20, the thermal contraction of both the mounting boss portions 26 and 26 is caused in the cap portion 21. It is possible to block the influence on the fitting surface 22 by the thin connecting portion 28 ′, and it is possible to always ensure a good fitting surface 22 without distortion as in the previous embodiment.

またキャップ部２１及び取り付けボス部２６，２６間を連結する薄肉の連結部２８′は，キャップ部２１より剛性が弱いので，メンテナンス時，燃料ジョイント部２７への燃料供給管３３の脱着や受電用カプラ１４への給電用カプラ３４の脱着を行うとき，キャップ部２１に大きな荷重が加わると，前記連結部２８′が適度に撓むことで，燃料噴射弁１０の燃料入口部１２とキャップ部２１との嵌合部に過大な荷重が加わることを防ぐことができ，したがって上記嵌合部の歪みを回避して，燃料のリークを防ぐことができる。   Further, the thin connecting portion 28 ′ that connects the cap portion 21 and the mounting boss portions 26, 26 is less rigid than the cap portion 21, so that the fuel supply pipe 33 can be attached to and detached from the fuel joint portion 27 and can receive power during maintenance. When a power supply coupler 34 is attached to or detached from the coupler 14, if a large load is applied to the cap portion 21, the connecting portion 28 ′ is appropriately bent, so that the fuel inlet portion 12 and the cap portion 21 of the fuel injection valve 10 are bent. Therefore, it is possible to prevent an excessive load from being applied to the fitting portion. Therefore, distortion of the fitting portion can be avoided and fuel leakage can be prevented.

以上，本発明の実施例について説明したが，本発明はそれに限定されることなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。   As mentioned above, although the Example of this invention was described, this invention is not limited to it, A various design change is possible in the range which does not deviate from the summary.

本発明の第１実施例に係る保持部材を使用して燃料噴射弁をエンジンのスロットルボディに取り付けた状態を示す平面図。The top view which shows the state which attached the fuel injection valve to the throttle body of the engine using the holding member which concerns on 1st Example of this invention. 図１の２−２線断面図。FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. 図１の３矢視図。FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1. 前記保持部材の底面図。The bottom view of the said holding member. 図４の５−５線断面図。FIG. 5 is a sectional view taken along line 5-5 of FIG. 図４の６矢視図。6 is a view taken in the direction of arrow 6 in FIG. 本発明の第２実施例を示す断面図。Sectional drawing which shows 2nd Example of this invention.

符号の説明Explanation of symbols

１・・・・・吸気路部材（スロットルボディ）
４・・・・・取り付け孔
１０・・・・燃料噴射弁
１１・・・・燃料噴射部
１２・・・・燃料入口部
１４・・・・受電用カプラ
２０・・・・保持部材
２１・・・・キャップ部
２２・・・・嵌合面
２６・・・・取り付けボス部
２７・・・・燃料ジョイント部
２８′・・・薄肉連結部
３３・・・・燃料供給管
３４・・・・給電用カプラ 1 ... Intake channel member (throttle body)
4... Mounting hole 10... Fuel injection valve 11... Fuel injection part 12... Fuel inlet part 14. ··· Cap portion 22 ··· Fitting surface 26 ··· Mounting boss portion 27 ··· Fuel joint portion 28 '··· Thin connection portion 33 ··· Fuel supply pipe 34 ··· Power supply Coupler

Claims (3)

吸気路部材（１）に設けられた取り付け孔（４）に一端部の燃料噴射部（１１）を挿入した燃料噴射弁（１０）を吸気路部材（１）に保持するものであって，燃料噴射弁（１０）の他端部の燃料入口部（１２）外周に液密に嵌装されるキャップ部（２１）に，内部がこのキャップ部（２１）内と連通する燃料ジョイント部（２７）と，前記吸気路部材（１）に結合される取り付けボス部（２６）とが一体に連結されるように，これらを合成樹脂により一体成形してなる，燃料噴射弁用保持部材において，
前記取り付けボス部（２６）を，前記キャップ部（２１）内周の，前記燃料入口部（１２）との嵌合面（２２）から軸方向に離れた部位でキャップ部（２１）に連結したことを特徴とする，燃料噴射弁用保持部材。 A fuel injection valve (10) having a fuel injection part (11) at one end inserted into a mounting hole (4) provided in the intake path member (1) is held by the intake path member (1), A fuel joint portion (27) whose inside communicates with the inside of the cap portion (21) is connected to the outer periphery of the fuel inlet portion (12) at the other end of the injection valve (10) in a liquid-tight manner. And a fuel injection valve holding member formed integrally with a synthetic resin so that a mounting boss portion (26) coupled to the intake passage member (1) is integrally connected,
The mounting boss part (26) is connected to the cap part (21) at a part of the inner periphery of the cap part (21) that is axially separated from the fitting surface (22) with the fuel inlet part (12). A fuel injection valve holding member. 請求項１記載の燃料噴射弁用保持部材において，
一対の取り付けボス部（２６）と一本の燃料ジョイント部（２７）とを，キャップ部（２１）の周りに分散して配置したことを特徴とする，燃料噴射弁用保持部材。 The fuel injection valve holding member according to claim 1,
A holding member for a fuel injection valve, wherein a pair of mounting boss portions (26) and one fuel joint portion (27) are distributed around a cap portion (21). 請求項１記載の燃料噴射弁用保持部材において，
キャップ部（２１）及び取り付けボス部（２６）間の連結部（２８′）の剛性を，キャップ部（２１）の剛性より弱くしたことを特徴とする，燃料噴射弁用保持部材。
The fuel injection valve holding member according to claim 1,
A fuel injection valve holding member characterized in that the rigidity of the connecting portion (28 ') between the cap portion (21) and the mounting boss portion (26) is weaker than the rigidity of the cap portion (21).
JP2005083606A 2005-03-23 2005-03-23 Holding member for fuel injection valve Expired - Fee Related JP4125731B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2005083606A JP4125731B2 (en) 2005-03-23 2005-03-23 Holding member for fuel injection valve
CN2006800093194A CN101146993B (en) 2005-03-23 2006-03-16 Holding member for fuel injection valve
ES06729206T ES2421918T3 (en) 2005-03-23 2006-03-16 Clamping member for fuel injection valve
EP06729206.0A EP1862667B1 (en) 2005-03-23 2006-03-16 Holding member for fuel injection valve
PCT/JP2006/305209 WO2006100995A1 (en) 2005-03-23 2006-03-16 Holding member for fuel injection valve
CN201110325259.XA CN102410120B (en) 2005-03-23 2006-03-16 Holding member for fuel injection valve
BRPI0607319-0A BRPI0607319B1 (en) 2005-03-23 2006-03-16 FIXING MEMBER FOR FUEL INJECTION VALVE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005083606A JP4125731B2 (en) 2005-03-23 2005-03-23 Holding member for fuel injection valve

Publications (2)

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JP2006266131A true JP2006266131A (en) 2006-10-05
JP4125731B2 JP4125731B2 (en) 2008-07-30

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JP2009281237A (en) * 2008-05-21 2009-12-03 Honda Motor Co Ltd Intake structure for straddle type vehicle
WO2010137526A1 (en) * 2009-05-29 2010-12-02 株式会社ケーヒン Fuel injection valve mounting structure
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JP2016070188A (en) * 2014-09-30 2016-05-09 本田技研工業株式会社 Injector assembly body
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