JP6573588B2 - Fuel piping assembly, fuel injection valve and fuel supply piping - Google Patents

Fuel piping assembly, fuel injection valve and fuel supply piping

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JP6573588B2
JP6573588B2 JP2016172499A JP2016172499A JP6573588B2 JP 6573588 B2 JP6573588 B2 JP 6573588B2 JP 2016172499 A JP2016172499 A JP 2016172499A JP 2016172499 A JP2016172499 A JP 2016172499A JP 6573588 B2 JP6573588 B2 JP 6573588B2
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injection valve
fuel injection
fuel
valve assembly
assembly
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田原　重則
重則 田原
相馬　正浩
正浩 相馬
希孝 小島
希孝 小島
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Hitachi Astemo Ltd
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Description

本発明は、筒内噴射エンジン等に好適な燃料噴射装置に係り、エンジンに形成された燃料噴射弁装着孔と燃料供給配管側に設けられた燃料噴射弁組付部との間に燃料噴射弁を組み付ける燃料噴射弁の組み付け構造に関する。   The present invention relates to a fuel injection device suitable for an in-cylinder injection engine or the like, and a fuel injection valve between a fuel injection valve mounting hole formed in the engine and a fuel injection valve assembly provided on a fuel supply pipe side. The present invention relates to a fuel injection valve assembly structure.

近年、燃焼室内に燃料であるガソリンを直接噴射する燃料噴射弁を気筒ごとに設けた筒内噴射エンジン（筒内噴射内燃機関）の開発/改良が進められている。筒内噴射エンジンに用いられる燃料噴射弁（インジェクタ）として、例えば米国特許出願公開第２００８／００５３４０９号明細書（特許文献１）には、燃料供給配管からシリンダヘッドを通して燃焼室に燃料を配送する燃料噴射弁が記載されている。この燃料噴射弁は、燃料供給配管から吊り下げられ、シリンダヘッドに設けられた開口（燃料噴射弁装着孔）に燃料噴射ノズル（燃料流れ方向における下流側の端部）が挿入されて、組み付けられている。またこの燃料噴射弁は、基端部（燃料流れ方向における上流側の端部）が燃料供給配管側のインジェクタカップ（燃料噴射弁組付部）に連結され、インジェクタカップの内周面と燃料噴射弁の基端部の内周面との間にＯリングがシール部材として設けられている（段落００２６−００２９及び図４参照）。   In recent years, development / improvement of in-cylinder injection engines (in-cylinder injection internal combustion engines) in which a fuel injection valve for directly injecting gasoline as fuel into a combustion chamber is provided for each cylinder has been promoted. As a fuel injection valve (injector) used for an in-cylinder injection engine, for example, US Patent Application Publication No. 2008/0053409 (Patent Document 1) discloses a fuel that delivers fuel from a fuel supply pipe to a combustion chamber through a cylinder head. An injection valve is described. This fuel injection valve is suspended from the fuel supply pipe, and is assembled by inserting a fuel injection nozzle (downstream end in the fuel flow direction) into an opening (fuel injection valve mounting hole) provided in the cylinder head. ing. The fuel injection valve has a base end (upstream end in the fuel flow direction) connected to an injector cup (fuel injection valve assembly) on the fuel supply piping side, and the inner peripheral surface of the injector cup and the fuel injection An O-ring is provided as a sealing member between the inner peripheral surface of the proximal end portion of the valve (see paragraphs 0026-0029 and FIG. 4).

米国特許出願公開第２００８／００５３４０９号明細書US Patent Application Publication No. 2008/0053409

現状の燃料圧力（以下、燃圧という）の範囲では、燃料噴射弁とインジェクタカップとの間の燃料シールは弾性部材からなるＯリングで実現できている。しかし、今後は、さらなる燃費他の性能の向上のため、燃料噴射弁に供給する燃料圧力が高められる傾向にあり、高耐圧のシール構造が必要になると予想される。この場合、Ｏリングシールでは対応できない可能性がある。また、Ｏリングシールに代えて、図８Ａ及び図８Ｂに示すような、高い燃圧に対応できる半球状の金属シール構造９，１０を採用すると、燃料噴射弁取付孔とインジェクタカップとの寸法ズレにより、燃料噴射弁を曲げてしまうことになり、燃料噴射弁の噴射特性が変化する、または、最悪の場合、燃料噴射弁を壊してしまうという課題がある。また、燃料噴射弁に半球状の金属シール構造を採用する場合、半球状の加工部品の追加が必要であり、コストアップにつながる。   In the current range of fuel pressure (hereinafter referred to as fuel pressure), the fuel seal between the fuel injection valve and the injector cup can be realized by an O-ring made of an elastic member. However, in the future, in order to further improve the fuel efficiency and other performances, the fuel pressure supplied to the fuel injection valve tends to be increased, and it is expected that a high pressure resistant seal structure will be required. In this case, there is a possibility that the O-ring seal cannot cope. In addition, if hemispherical metal seal structures 9 and 10 that can cope with high fuel pressures are employed instead of O-ring seals, as shown in FIGS. 8A and 8B, dimensional displacement between the fuel injection valve mounting hole and the injector cup may occur. Therefore, the fuel injection valve is bent, and the injection characteristic of the fuel injection valve changes, or in the worst case, the fuel injection valve is broken. Further, when a hemispherical metal seal structure is adopted for the fuel injection valve, it is necessary to add hemispherical processed parts, leading to an increase in cost.

本発明は、エンジン側に設けられた燃料噴射弁装着孔と燃料供給配管側の燃料噴射弁組付部との寸法ズレを吸収することができると共に、高い燃圧に対応可能なシール構造を有する燃料噴射弁と燃料供給配管との組み付け構造を提供することを目的とする。   The present invention can absorb a dimensional deviation between a fuel injection valve mounting hole provided on the engine side and a fuel injection valve assembly portion on the fuel supply pipe side, and has a seal structure that can cope with a high fuel pressure. It aims at providing the assembly structure of an injection valve and fuel supply piping.

上記目的を達成するために、本発明の燃料配管アセンブリは、
複数の燃料噴射弁と、前記燃料噴射弁が組み付けられる燃料噴射弁組付部を複数有し燃料が流通する燃料供給配管と、前記燃料噴射弁の中心軸線に沿う方向に前記燃料噴射弁に延設された燃料通路と、前記燃料噴射弁組付部の中心軸線に沿う方向に前記燃料噴射弁組付部に延設された燃料通路と、を備えた燃料配管アセンブリにおいて、
前記燃料噴射弁と前記燃料噴射弁組付部との相互に当接する当接面の少なくともいずれか一方の当接面に凹形状部を有し、
前記燃料噴射弁と前記燃料噴射弁組付部とのうち、前記凹形状部が設けられた当接面を有する方に設けられた前記燃料通路が、前記凹形状部の底面に開口し、
前記凹形状部に、前記凹形状部の内周面及び底面と、前記凹形状部が形成された当接面に当接する他方の当接面とに圧接して、燃料をシールするシール部材を設け、
前記シール部材は、環状の金属製部材で構成されると共に、前記燃料噴射弁の中心軸線に沿う方向の断面が開放部を有するアルファベットのＣの字の形状をしており、
前記Ｃの字の形状の前記開放部は内周側に位置し、前記燃料通路に対向している。
また本発明の燃料噴射弁は、
基端部を燃料供給配管の燃料噴射弁組付部に組み付けられ、先端部をエンジンの燃料噴射弁装着孔に挿入されて組み付けられる燃料噴射弁であって、前記燃料噴射弁の中心軸線に沿う方向に前記燃料噴射弁に延設された燃料通路を有する燃料噴射弁において、
前記燃料噴射弁組付部の端面と当接する当接面に先端部側に向かって窪んだ凹形状部を有し、
前記燃料通路が前記凹形状部の底面に開口し、
前記凹形状部に、前記凹形状部の内周面及び底面と、前記燃料噴射弁組付部の前記端面とに圧接して、燃料をシールするシール部材を設け、
前記シール部材は、環状の金属製部材で構成されると共に、前記燃料噴射弁の中心軸線に沿う方向の断面が開放部を有するアルファベットのＣの字の形状をしており、
前記Ｃの字の形状の前記開放部が内周側に位置している。
また本発明の燃料供給配管は、
燃料噴射弁の基端部が組み付けられる燃料噴射弁組付部を有する燃料供給配管であって、前記燃料噴射弁組付部の中心軸線に沿う方向に前記燃料噴射弁組付部に延設された燃料通路を有する燃料供給配管において、
前記燃料噴射弁の基端部の端面と当接する前記燃料噴射弁組付部の当接面に、前記燃料噴射弁の基端部側とは反対側に向かって窪んだ凹形状部を有し、
前記燃料通路が前記凹形状部の底面に開口し、
前記凹形状部に、前記凹形状部の内周面及び底面と、前記燃料噴射弁の前記基端部の前記端面とに圧接して、燃料をシールするシール部材を設け、
前記シール部材は、環状の金属製部材で構成されると共に、前記燃料噴射弁の中心軸線に沿う方向の断面が開放部を有するアルファベットのＣの字の形状をしており、
前記Ｃの字の形状の前記開放部は内周側に位置し、前記燃料通路に対向している。 In order to achieve the above object, the fuel pipe assembly of the present invention comprises:
A plurality of fuel injection valves; a fuel supply pipe having a plurality of fuel injection valve assembly parts to which the fuel injection valves are assembled; and a fuel supply pipe through which fuel circulates; and extends to the fuel injection valve in a direction along a central axis of the fuel injection valve. A fuel pipe assembly comprising: a fuel passage provided ; and a fuel passage extending to the fuel injection valve assembly in a direction along a central axis of the fuel injection valve assembly;
A concave shape portion on at least one of the contact surfaces of the fuel injection valve and the fuel injection valve assembly portion that contact each other;
Of the fuel injection valve and the fuel injection valve assembly portion, the fuel passage provided on the side having the contact surface provided with the concave shape portion opens to the bottom surface of the concave shape portion,
A seal member that seals the fuel by pressing the concave shape portion against the inner peripheral surface and the bottom surface of the concave shape portion and the other abutting surface that abuts the abutting surface on which the concave shape portion is formed; Provided ,
The seal member is formed of an annular metal member, and the cross section in the direction along the central axis of the fuel injection valve has an alphabet C shape having an open portion,
The open portion of the shape of letter of the C is located on the inner peripheral side, that has to face the fuel passage.
The fuel injection valve of the present invention is
A fuel injection valve having a base end portion assembled to a fuel injection valve assembly portion of a fuel supply pipe and a tip end portion inserted into a fuel injection valve mounting hole of the engine for assembly , which is along the central axis of the fuel injection valve In a fuel injection valve having a fuel passage extending in the direction to the fuel injection valve ,
The contact surface that contacts the end surface of the fuel injection valve assembly portion has a recessed portion that is recessed toward the tip end side;
The fuel passage opens to the bottom surface of the concave portion;
A seal member that seals the fuel is provided in the concave shape portion in pressure contact with the inner peripheral surface and the bottom surface of the concave shape portion and the end surface of the fuel injection valve assembly portion ,
The seal member is formed of an annular metal member, and the cross section in the direction along the central axis of the fuel injection valve has an alphabet C shape having an open portion,
The open portion of the shape of letter of the C is that located on the inner peripheral side.
The fuel supply pipe of the present invention is
A fuel supply pipe having a fuel injection valve assembly portion to which a base end portion of the fuel injection valve is assembled, and extends to the fuel injection valve assembly portion in a direction along a central axis of the fuel injection valve assembly portion. In a fuel supply pipe having a fuel passage
The contact surface of the fuel injection valve assembly that contacts the end surface of the base end portion of the fuel injection valve has a concave portion that is recessed toward the side opposite to the base end side of the fuel injection valve. ,
The fuel passage opens to the bottom surface of the concave portion;
A seal member that seals fuel by providing pressure contact with the inner peripheral surface and the bottom surface of the concave shape portion and the end surface of the base end portion of the fuel injection valve is provided in the concave shape portion ,
The seal member is formed of an annular metal member, and the cross section in the direction along the central axis of the fuel injection valve has an alphabet C shape having an open portion,
The open portion of the shape of letter of the C is located on the inner peripheral side, that has to face the fuel passage.

本発明によれば、燃料供給配管側の燃料噴射弁組付部の軸心とエンジンの燃料噴射弁装着孔の軸心との間にズレ（軸心ズレ）があっても、金属Ｏリングが平面シール構造を実現することにより、燃料噴射弁組付部と燃料噴射弁装着孔との軸心ズレを吸収することができると共に、高い燃圧に対応可能なシール構造を実現することができる。上記した以外の課題、構成及び効果は、以下の実施形態の説明により明らかにされる。   According to the present invention, even if there is a deviation (axial deviation) between the axis of the fuel injection valve assembly on the fuel supply pipe side and the axis of the fuel injection valve mounting hole of the engine, the metal O-ring is By realizing the flat seal structure, it is possible to absorb the axial misalignment between the fuel injection valve assembly portion and the fuel injection valve mounting hole, and it is possible to realize a seal structure that can cope with a high fuel pressure. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

第1実施例（実施例１）に係る燃料配管アセンブリの全体斜視図。1 is an overall perspective view of a fuel pipe assembly according to a first embodiment (embodiment 1). FIG. 第1実施例（実施例１）に係る燃料配管アセンブリのエンジン装着状態を示す全体斜視図。The whole perspective view which shows the engine mounting state of the fuel piping assembly which concerns on 1st Example (Example 1). 第1実施例（実施例１）に係る燃料配管アセンブリの要部斜視図。The principal part perspective view of the fuel piping assembly which concerns on 1st Example (Example 1). 第1実施例（実施例１）に係る燃料配管アセンブリの要部分解立体図。The principal part exploded three-dimensional view of the fuel piping assembly which concerns on 1st Example (Example 1). 第1実施例（実施例１）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面斜視図。The cross-sectional perspective view which expands and shows the fuel-injection-valve assembly part by the side of the fuel supply piping of the fuel piping assembly which concerns on 1st Example (Example 1). 第1実施例（実施例１）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図。Sectional drawing which expands and shows the fuel-injection-valve assembly part by the side of the fuel supply piping of the fuel piping assembly which concerns on 1st Example (Example 1). 第1実施例（実施例１）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図であり、締結ナットの締結が完了する前の状態を示す図である。It is sectional drawing which expands and shows the fuel injection valve assembly part by the side of the fuel supply piping of the fuel piping assembly which concerns on 1st Example (Example 1), and is a figure which shows the state before the fastening of a fastening nut is completed. is there. 第1実施例（実施例１）に係る燃料配管アセンブリのエンジン装着状態を示す、軸心ズレが無い場合の断面図。FIG. 6 is a cross-sectional view showing a state where the fuel pipe assembly according to the first example (Example 1) is mounted on the engine when there is no axial misalignment. 第1実施例（実施例１）に係る燃料配管アセンブリのエンジン装着状態を示す、軸心ズレが有る場合の断面図。FIG. 3 is a cross-sectional view showing an engine mounted state of the fuel pipe assembly according to the first embodiment (first embodiment) when there is an axial misalignment. 第２実施例（実施例２）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図。Sectional drawing which expands and shows the fuel-injection-valve assembly part by the side of the fuel supply piping of the fuel piping assembly which concerns on 2nd Example (Example 2). 本発明との比較例（第１比較例）における燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図。Sectional drawing which expands and shows the fuel-injection-valve assembly part by the side of the fuel supply piping in the comparative example (1st comparative example) with this invention. 本発明との比較例（第２比較例）における燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図。Sectional drawing which expands and shows the fuel-injection-valve assembly part by the side of the fuel supply piping in the comparative example (2nd comparative example) with this invention.

以下、図面を参照して、本発明を適用した筒内噴射エンジン（筒内噴射内燃機関）用の燃料配管アセンブリの一実施例について、詳細に説明する。   Hereinafter, an embodiment of a fuel pipe assembly for a cylinder injection engine (cylinder injection internal combustion engine) to which the present invention is applied will be described in detail with reference to the drawings.

図１は、第1実施例（実施例１）に係る燃料配管アセンブリの全体斜視図である。図２は、第1実施例（実施例１）に係る燃料配管アセンブリのエンジン装着状態を示す全体斜視図である。   FIG. 1 is an overall perspective view of a fuel pipe assembly according to a first embodiment (embodiment 1). FIG. 2 is an overall perspective view showing an engine mounted state of the fuel pipe assembly according to the first embodiment (first embodiment).

以下の説明では、後述する他の実施例も含めて、燃料噴射弁２について、燃料流れ方向における上流側の端部２ｂ（図４参照）を基端部又は基端と呼び、燃料流れ方向における下流側の端部２ａ（図４参照）を先端部又は先端と呼ぶ。燃料噴射弁２の先端部（先端側）２ａには燃料を噴射するノズル部（燃料噴射部）が構成されるため、この先端部をノズル部と呼ぶ場合もある。また燃料噴射弁２の基端部２ｂ側を上端部又は上端、先端部２ａ側を下端部又は下端と呼ぶ場合もあるが、これは図１及び図２に基づいて上下方向を定義したものであり、燃料噴射弁２の実装状態における上下方向とは関係がない。   In the following description, the upstream end 2b (see FIG. 4) in the fuel flow direction of the fuel injection valve 2, including other embodiments described later, is referred to as the base end or the base end, and in the fuel flow direction. The downstream end 2a (see FIG. 4) is referred to as a tip or tip. Since the nozzle part (fuel injection part) which injects fuel is comprised in the front-end | tip part (tip side) 2a of the fuel injection valve 2, this front-end | tip part may be called a nozzle part. In some cases, the base end 2b side of the fuel injection valve 2 is referred to as an upper end or upper end, and the tip end 2a side is referred to as a lower end or lower end, but this defines the vertical direction based on FIGS. Yes, it has nothing to do with the vertical direction in the mounted state of the fuel injection valve 2.

図１及び図２に示すように、本実施例の燃料配管アセンブリ1は、その内部に燃料が流通する燃料供給配管１ａと、燃料供給配管１ａから燃料が供給される燃料噴射弁組付部（インジェクタカップ）４と、燃料噴射弁組付部４に組み付けられる燃料噴射弁２と、を備えて構成される。   As shown in FIGS. 1 and 2, the fuel pipe assembly 1 of this embodiment includes a fuel supply pipe 1 a through which fuel flows and a fuel injection valve assembly portion (to which fuel is supplied from the fuel supply pipe 1 a ( Injector cup) 4 and a fuel injection valve 2 assembled to the fuel injection valve assembly 4.

燃料供給配管１ａには、燃料配管アセンブリ1をエンジン７に取り付ける取付部（固定部）１１が設けられている。本実施例では、取付部１１に設けたボルト挿通孔１１ａに図示しないボルトを挿通し、このボルトをエンジン７の図示しないねじ穴に螺合することにより、燃料配管アセンブリ1をエンジン７に固定する。   The fuel supply pipe 1 a is provided with a mounting portion (fixed portion) 11 for attaching the fuel pipe assembly 1 to the engine 7. In this embodiment, a bolt (not shown) is inserted into a bolt insertion hole 11 a provided in the mounting portion 11, and this bolt is screwed into a screw hole (not shown) of the engine 7, thereby fixing the fuel pipe assembly 1 to the engine 7. .

従来の燃料噴射弁組付部は、燃料噴射弁の基端部が挿入される凹部を有し、カップ形状に形成されていたため、燃料噴射弁組付部をインジェクタカップと呼ぶ場合がある。本実施例では、燃料噴射弁組付部４はカップ形状に形成される必要はないが、従来の呼称に倣って燃料噴射弁組付部４をインジェクタカップと呼ぶ場合もある。   Since the conventional fuel injection valve assembly portion has a recess into which the base end portion of the fuel injection valve is inserted and is formed in a cup shape, the fuel injection valve assembly portion may be called an injector cup. In the present embodiment, the fuel injection valve assembly portion 4 does not need to be formed in a cup shape, but the fuel injection valve assembly portion 4 may be referred to as an injector cup following the conventional name.

燃料噴射弁２は、締結ナット３により、燃料供給配管１ａの燃料噴射弁組付部４に組み付けられる。最終的には、燃料噴射弁２は、先端部がエンジン７に設けられた燃料噴射弁装着孔７ａに挿入され、基端部が燃料噴射弁組付部４に組み付けられることにより、エンジン７及び燃料供給配管１ａに対して固定される。   The fuel injection valve 2 is assembled to the fuel injection valve assembly portion 4 of the fuel supply pipe 1 a by a fastening nut 3. Eventually, the fuel injection valve 2 is inserted into the fuel injection valve mounting hole 7a provided in the engine 7 at the distal end portion and assembled into the fuel injection valve assembly portion 4 at the base end portion. Fixed to the fuel supply pipe 1a.

図３は、第1実施例（実施例１）に係る燃料配管アセンブリの要部斜視図である。図４は、第1実施例（実施例１）に係る燃料配管アセンブリの要部分解立体図である。   FIG. 3 is a perspective view of a main part of the fuel pipe assembly according to the first embodiment (first embodiment). FIG. 4 is an exploded perspective view of a main part of the fuel pipe assembly according to the first embodiment (first embodiment).

燃料供給配管１ａは、長手方向１Ａに沿う直線形状に形成され、長手方向１Ａを横切る断面の中心部に、燃料通路１ａａが形成されている。燃料通路１ａａは長手方向１Ａに沿って延設されている。   The fuel supply pipe 1a is formed in a linear shape along the longitudinal direction 1A, and a fuel passage 1aa is formed at the center of the cross section that crosses the longitudinal direction 1A. The fuel passage 1aa extends along the longitudinal direction 1A.

燃料噴射弁２は、基端部２ｂにフランジ部（拡径部）６が形成されており、フランジ部６の基端側２ｂの端面（上端面）６ｂに先端側２ａに向かって窪んだ凹形状部６ａが形成されている。燃料噴射弁２の凹形状部６ａにはシール部材５が配設される。シール部材５は金属製の環状部材であり、以下、金属Ｏリングと呼ぶ。   The fuel injection valve 2 has a flange portion (expanded diameter portion) 6 formed at the base end portion 2b, and a recess recessed toward the tip end side 2a at the end surface (upper end surface) 6b of the base end side 2b of the flange portion 6. A shape portion 6a is formed. A seal member 5 is disposed in the concave portion 6 a of the fuel injection valve 2. The seal member 5 is a metal annular member, and is hereinafter referred to as a metal O-ring.

燃料噴射弁２の基端部２ｂには、締結ナット３が設けられている。締結ナット３は、燃料噴射弁２を軸として回転可能な状態で、燃料噴射弁２の基端部２ｂに軸支されている。締結ナット３を燃料噴射弁組付部４に締結することにより、燃料噴射弁２が燃料噴射弁組付部４に固定される。   A fastening nut 3 is provided at the base end 2 b of the fuel injection valve 2. The fastening nut 3 is pivotally supported on the base end portion 2b of the fuel injection valve 2 in a state where the fastening nut 3 can rotate about the fuel injection valve 2. The fuel injection valve 2 is fixed to the fuel injection valve assembly portion 4 by fastening the fastening nut 3 to the fuel injection valve assembly portion 4.

なお図４では、燃料噴射弁組付部４の中心軸線４Ａと燃料噴射弁２の中心軸線２Ａとがズレ（軸心ズレ）が無い状態で一致した状態を示している。   FIG. 4 shows a state where the center axis 4A of the fuel injection valve assembly 4 and the center axis 2A of the fuel injection valve 2 coincide with each other without any deviation (axial misalignment).

図５Ａは、第1実施例（実施例１）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面斜視図である。図５Ｂは、第1実施例（実施例１）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図である。図５Ｃは、第1実施例（実施例１）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図であり、締結ナットの締結が完了する前の状態を示す図である。   FIG. 5A is an enlarged cross-sectional perspective view of the fuel injection valve assembly portion on the fuel supply pipe side of the fuel pipe assembly according to the first embodiment (first embodiment). FIG. 5B is an enlarged cross-sectional view of the fuel injection valve assembly portion on the fuel supply pipe side of the fuel pipe assembly according to the first embodiment (first embodiment). FIG. 5C is an enlarged cross-sectional view of the fuel injection valve assembly portion on the fuel supply pipe side of the fuel pipe assembly according to the first embodiment (first embodiment), and shows a state before fastening of the fastening nut is completed. FIG.

燃料噴射弁組付部４は、燃料供給配管１ａの長手方向１Ａを横切る方向４Ａに、燃料供給配管１ａから突出するように設けられている。特に本実施例では、長手方向１Ａと方向４Ａとは直交するように構成されている。燃料噴射弁組付部４は、燃料供給配管１ａと一体に成型されてもよいし、燃料供給配管１ａとは別部材として構成された部品を燃料供給配管１ａに固定したものであってもよい。なお燃料噴射弁組付部４は、燃料供給配管１ａの一部とみなしてもよい。   The fuel injection valve assembly 4 is provided so as to protrude from the fuel supply pipe 1a in a direction 4A across the longitudinal direction 1A of the fuel supply pipe 1a. In particular, in this embodiment, the longitudinal direction 1A and the direction 4A are configured to be orthogonal to each other. The fuel injection valve assembly portion 4 may be formed integrally with the fuel supply pipe 1a, or may be a part configured as a separate member from the fuel supply pipe 1a and fixed to the fuel supply pipe 1a. . The fuel injection valve assembly 4 may be regarded as a part of the fuel supply pipe 1a.

燃料噴射弁組付部４は、燃料噴射弁２が組み付けられる側の端部に、環状の端面４ａを有する。環状の端面４ａの中心側には燃料通路４ｂが開口し、端面４ａは燃料通路４ｂの周囲を囲んでいる。また燃料噴射弁組付部４の外周面には、ねじ溝（雄ねじ）４ｃが螺刻されている。   The fuel injection valve assembly portion 4 has an annular end surface 4a at the end on the side where the fuel injection valve 2 is assembled. A fuel passage 4b is opened on the center side of the annular end surface 4a, and the end surface 4a surrounds the periphery of the fuel passage 4b. A thread groove (male thread) 4c is threaded on the outer peripheral surface of the fuel injection valve assembly 4.

燃料噴射弁２のフランジ部６の上端面６ｂには、内周面６ａａと底面６ａｂとを有する凹形状部６ａが形成されており、凹形状部６ａに金属Ｏリング５が配設されている。底面６ａｂの中央部分には、燃料噴射弁２のノズル部２ａに連通する燃料通路２ｃが開口している。金属Ｏリング５は環状に形成されていることにより、燃料噴射弁組付部４の燃料通路４ｂに供給された燃料は、金属Ｏリング５の中心部を通過して、燃料噴射弁２の燃料通路２ｃに流下することができる。   A concave portion 6a having an inner peripheral surface 6aa and a bottom surface 6ab is formed on the upper end surface 6b of the flange portion 6 of the fuel injection valve 2, and a metal O-ring 5 is disposed on the concave portion 6a. . A fuel passage 2c communicating with the nozzle portion 2a of the fuel injection valve 2 is opened at the center of the bottom surface 6ab. Since the metal O-ring 5 is formed in an annular shape, the fuel supplied to the fuel passage 4b of the fuel injection valve assembly 4 passes through the central portion of the metal O-ring 5 and the fuel of the fuel injection valve 2 It can flow down to the passage 2c.

締結ナット（締結部材）３は、下端部（燃料噴射弁２側の端部）に、燃料噴射弁２のフランジ部６の下端面（先端２ａ側の面）６ｂと係合する係止部（係合部）３ａを有する。係止部６ｂの中心部には、燃料噴射弁２の基端部２ｂが挿通する貫通孔３ｂが形成されており、貫通孔３ｂの直径（内径）はフランジ部６の直径（外径）よりも小さい。また締結ナット３は、内周面３ｃに、ねじ溝（雌ねじ）３ｄが螺刻されている。なお、燃料噴射弁２のフランジ部６の下端面６ｂは、締結ナット３の係止部３ａと係合する係止部（係合部）を構成する。   The fastening nut (fastening member) 3 has a lower end (end on the fuel injection valve 2 side) engaging with a lower end surface (surface on the front end 2a side) 6b of the flange 6 of the fuel injection valve 2 ( Engaging portion) 3a. A through hole 3b through which the base end 2b of the fuel injection valve 2 is inserted is formed at the center of the locking portion 6b. The diameter (inner diameter) of the through hole 3b is larger than the diameter (outer diameter) of the flange portion 6. Is also small. The fastening nut 3 has a thread groove (female thread) 3d threaded on the inner peripheral surface 3c. Note that the lower end surface 6 b of the flange portion 6 of the fuel injection valve 2 constitutes a locking portion (engaging portion) that engages with the locking portion 3 a of the fastening nut 3.

締結ナット３と燃料噴射弁組付部４とがねじ（雌ねじ）３ｄとねじ（雄ねじ）４ｃとにより螺合されて締結されると、図５Ｂの状態となる。この状態では、燃料噴射弁２のフランジ部６の係止部６ｂと締結ナット３の係止部３ａとが圧接し、燃料噴射弁組付部４の下端面４ａと燃料噴射弁２の基端２ｂ側の端面（フランジ６の上端面）６ｃとが圧接することにより、燃料噴射弁２が中心軸線２Ａの回りに回転しないように、固定される。またこの状態では、金属Ｏリング５は、燃料噴射弁組付部４の下端面４ａと、凹形状部６ａの内周面６ａａと、凹形状部６ａの底面６ａｂと、に面で接触し、燃料をシールする状態となる（図５Ｂ参照）。   When the fastening nut 3 and the fuel injection valve assembly portion 4 are screwed together by a screw (female screw) 3d and a screw (male screw) 4c, the state shown in FIG. 5B is obtained. In this state, the locking portion 6b of the flange portion 6 of the fuel injection valve 2 and the locking portion 3a of the fastening nut 3 are in pressure contact, and the lower end surface 4a of the fuel injection valve assembly portion 4 and the base end of the fuel injection valve 2 The fuel injection valve 2 is fixed so as not to rotate around the central axis 2A by being in pressure contact with the end surface 2b side (upper end surface of the flange 6) 6c. In this state, the metal O-ring 5 is in surface contact with the lower end surface 4a of the fuel injection valve assembly portion 4, the inner peripheral surface 6aa of the concave shape portion 6a, and the bottom surface 6ab of the concave shape portion 6a. The fuel is sealed (see FIG. 5B).

本実施例では、締結ナット３と燃料噴射弁組付部４との締結により、燃料噴射弁２を燃料噴射弁組付部４に対して固定している。この固定力は、燃料噴射弁組付部４の下端面４ａと燃料噴射弁２の端面６ｃとの圧接力によって得られ、燃料噴射弁２の中心軸線２Ａ，４Ａに直交する方向への変位を妨げる構造的な規制部、例えばシール部材等は設けられていない。   In this embodiment, the fuel injection valve 2 is fixed to the fuel injection valve assembly 4 by fastening the fastening nut 3 and the fuel injection valve assembly 4. This fixing force is obtained by the pressure contact force between the lower end surface 4a of the fuel injection valve assembly 4 and the end surface 6c of the fuel injection valve 2, and the displacement in the direction perpendicular to the central axes 2A and 4A of the fuel injection valve 2 is obtained. No obstructive structural restriction, such as a seal member, is provided.

図５Ｃに示すように、締結ナット３の締結が完了する前の状態では、金属Ｏリング５の高さ寸法Ｈは、凹形状部６ａの溝深さ寸法Ｄよりも大きい。また金属Ｏリング５は、中心軸線２Ａ，４Ａに沿う方向の断面がアルファベットのＣの字の形状をしており、Ｃの字の形状の不連続部（切り欠き部）が内周側に位置している。この金属Ｏリング５を凹形状部６ａに配し、締結ナット３を燃料噴射弁組付部４に締結すると、金属Ｏリング５は上面側及び下面側から押圧力を受け、外周側に押し広げられるように変形する。その結果、金属Ｏリング５は、凹形状部６ａの内周面６ａａに押し付けられ、燃料噴射弁組付部４の下端面４ａと凹形状部６ａの底面６ａｂと凹形状部６ａの内周面６ａａとに圧接され、各面４ａ，６ａｂ，６ａａに密接するように変形する。これにより金属Ｏリング５は、燃料供給配管１ａから燃料噴射弁２に供給される燃料をシールする。   As shown in FIG. 5C, the height dimension H of the metal O-ring 5 is larger than the groove depth dimension D of the concave portion 6a in a state before the fastening nut 3 is completely fastened. In addition, the metal O-ring 5 has a cross-section in the direction along the central axes 2A and 4A in the shape of an alphabet C, and a discontinuous portion (notch) of the C-shape is located on the inner peripheral side. doing. When the metal O-ring 5 is arranged in the concave shape portion 6a and the fastening nut 3 is fastened to the fuel injection valve assembly portion 4, the metal O-ring 5 receives a pressing force from the upper surface side and the lower surface side and spreads to the outer peripheral side. To be deformed. As a result, the metal O-ring 5 is pressed against the inner peripheral surface 6aa of the concave portion 6a, and the lower end surface 4a of the fuel injection valve assembly portion 4, the bottom surface 6ab of the concave portion 6a, and the inner peripheral surface of the concave portion 6a. 6aaa, and is deformed so as to be in close contact with each of the surfaces 4a, 6ab, 6aa. Thereby, the metal O-ring 5 seals the fuel supplied to the fuel injection valve 2 from the fuel supply pipe 1a.

なお図５Ｂは、金属Ｏリング５の変形の様子を模式的に表しており、金属Ｏリング５の変形の状態を正確に表現したものではない。従って、金属Ｏリング５における各面４ａ，６ａｂ，６ａａとの接触面は、図５Ｂの状態よりも小さくなったり、大きくなったりする。   Note that FIG. 5B schematically shows the deformation state of the metal O-ring 5, and does not accurately represent the deformation state of the metal O-ring 5. Therefore, the contact surface with each surface 4a, 6ab, 6aa in the metal O-ring 5 becomes smaller or larger than the state of FIG. 5B.

金属Ｏリング５は、内周側（内径側）が開放されており、供給される燃料圧力によって燃料噴射弁組付部４の下端面４ａ、凹形状部６ａの内周面６ａａ及び凹形状部６ａの底面６ａｂのそれぞれに圧接する力を受ける。これにより金属Ｏリング５は、シール性をさらに向上させることができる。   The metal O-ring 5 is open on the inner peripheral side (inner diameter side), and the lower end surface 4a of the fuel injection valve assembly portion 4, the inner peripheral surface 6aa of the concave shape portion 6a, and the concave shape portion by the supplied fuel pressure. A force that presses against each of the bottom surfaces 6ab of 6a is received. Thereby, the metal O-ring 5 can further improve the sealing performance.

なお、燃料噴射弁組付部４の下端面４ａと燃料噴射弁２の基端２ｂ側の端面（フランジ６の上端面）６ｃとは、相互に当接する当接面を構成する。   The lower end surface 4a of the fuel injection valve assembly 4 and the end surface (upper end surface of the flange 6) 6c on the base end 2b side of the fuel injection valve 2 constitute an abutting surface that abuts each other.

図６Ａは、第1実施例（実施例１）に係る燃料配管アセンブリのエンジン装着状態を示す、軸心ズレが無い場合の断面図である。図６Ｂは、第1実施例（実施例１）に係る燃料配管アセンブリのエンジン装着状態を示す、軸心ズレが有る場合の断面図である。   FIG. 6A is a cross-sectional view showing a state where the fuel pipe assembly according to the first embodiment (embodiment 1) is mounted on the engine when there is no axial misalignment. FIG. 6B is a cross-sectional view showing a state where the fuel pipe assembly according to the first embodiment (embodiment 1) is mounted on the engine and having an axial misalignment.

燃料噴射弁２は、上記構造にて燃料供給配管１ａに保持されてエンジン７の複数の燃料噴射弁装着孔７ａに装着される。燃料供給配管１ａの複数の燃料噴射弁組付部４とエンジン7の複数の燃料噴射弁装着孔７ａとは別工程にて製作されるのが一般的である為、対応する燃料噴射弁組付部４と燃料噴射弁装着孔７ａとの間で、軸心ズレが発生する。この場合、燃料噴射弁２のノズル部２ａが挿入されるノズル装着孔（ノズル挿入孔）７ａａの軸心（中心軸線）７Ａと燃料噴射弁組付部４の軸心（中心軸線）４Ａとのズレが特に問題となる。   The fuel injection valve 2 is held by the fuel supply pipe 1 a with the above structure and is mounted in the plurality of fuel injection valve mounting holes 7 a of the engine 7. Since the plurality of fuel injection valve assembly portions 4 of the fuel supply pipe 1a and the plurality of fuel injection valve mounting holes 7a of the engine 7 are generally manufactured in separate processes, the corresponding fuel injection valve assembly is provided. An axial misalignment occurs between the portion 4 and the fuel injection valve mounting hole 7a. In this case, the axis (center axis) 7A of the nozzle mounting hole (nozzle insertion hole) 7aa into which the nozzle portion 2a of the fuel injection valve 2 is inserted and the axis (center axis) 4A of the fuel injection valve assembly 4 are formed. Misalignment is a particular problem.

図６Ａは、ノズル装着孔７ａａの軸心７Ａと燃料噴射弁組付部４の軸心４Ａとの間にズレが無い状態を示しており、組み付けた燃料噴射弁２の中心軸線２Ａは、軸心７Ａ及び軸心４Ａと一直線上に並ぶ。   FIG. 6A shows a state in which there is no deviation between the shaft center 7A of the nozzle mounting hole 7aa and the shaft center 4A of the fuel injection valve assembly 4, and the central axis 2A of the assembled fuel injection valve 2 is It is aligned with the center 7A and the axis 4A.

一方、図６Ｂは、ノズル装着孔７ａａの軸心７Ａと燃料噴射弁組付部４の軸心４Ａとの間にズレ８が有る状態を示しており、燃料噴射弁２に軸心７Ａと軸心４Ａとのズレ８の大きさに応じた荷重がかかる。燃料噴射弁２では、この荷重に対抗することができる高強度材や形状及び構造の採用が不可欠となり、コストアップにつながる。   On the other hand, FIG. 6B shows a state in which there is a deviation 8 between the shaft center 7A of the nozzle mounting hole 7aa and the shaft center 4A of the fuel injection valve assembly 4, and the fuel injection valve 2 has a shaft center 7A and a shaft. A load corresponding to the size of the deviation 8 from the core 4A is applied. In the fuel injection valve 2, it is indispensable to adopt a high-strength material, shape and structure capable of resisting this load, leading to an increase in cost.

しかし、本実施例の構造を採用することで、燃料噴射弁２と燃料噴射弁組付部４とが中心軸線２Ａ，４Ａに垂直な平面で接し、締結ナット３の締結時に燃料噴射弁２は中心軸線２Ａ，４Ａに垂直な方向（横切る方向）に移動（変位）して、軸心７Ａと軸心４Ａとのズレ８を吸収することができる。すなわち、本実施例の燃料配管アセンブリ1では、軸心ズレを補正した上でエンジン７の燃料噴射弁装着孔７ａに燃料噴射弁２を装着することが可能となる。このために、図５Ｂ及び図５Ｃに示すように、燃料噴射弁２のフランジ部６の外周面と締結ナット３の内周面との間には、中心軸線２Ａ，４Ａに垂直な方向における燃料噴射弁２の変位を可能にする隙間Ｓが、フランジ部６の全周に亘って設けられている。 However, by adopting the structure of the present embodiment, the fuel injection valve 2 and the fuel injection valve assembly portion 4 are in contact with each other on a plane perpendicular to the central axis 2A, 4A, and the fuel injection valve 2 is It can move (displace) in a direction (transverse direction) perpendicular to the central axes 2A and 4A to absorb the deviation 8 between the axis 7A and the axis 4A. That is, in the fuel pipe assembly 1 of this embodiment, the fuel injection valve 2 can be mounted in the fuel injection valve mounting hole 7a of the engine 7 after correcting the axial misalignment. For this, as shown in FIG. 5 B and 5C, between the inner peripheral surface of the outer peripheral surface and the fastening nut 3 of the flange portion 6 of the fuel injection valve 2, the central axis 2A, in the direction perpendicular to 4A A gap S that enables displacement of the fuel injection valve 2 is provided over the entire circumference of the flange portion 6.

従って、本実施例では、燃料噴射弁２に作用する中心軸線２Ａを横切る方向の荷重に対抗する高強度材や形状及び構造を採用する必要がなくなるか、高強度材の強度や形状及び構造の変更を軽微に済ませることができる。これにより、燃料配管アセンブリ1の製造コストを抑制することができる。   Therefore, in this embodiment, it is not necessary to employ a high-strength material, shape and structure that resists the load in the direction crossing the central axis 2A acting on the fuel injection valve 2, or the strength, shape and structure of the high-strength material are not required. You can make minor changes. Thereby, the manufacturing cost of the fuel piping assembly 1 can be suppressed.

図７は、第２実施例（実施例２）に係る燃料配管アセンブリの燃料供給配管側の燃料噴射弁組付部を拡大して示す断面図である。   FIG. 7 is an enlarged cross-sectional view of the fuel injection valve assembly portion on the fuel supply pipe side of the fuel pipe assembly according to the second embodiment (second embodiment).

本実施例では、燃料噴射弁２のフランジ部６に設けた凹形状部６ａに代えて、燃料噴射弁組付部４の下端面４ａに、燃料供給配管１ａ側に向かって窪んだ凹形状部４ｄを設ける。凹形状部４ｄは内周面４ｄａと底面４ｄｂとを有する。この凹形状部４ｄに金属Ｏリング５を配設する。   In this embodiment, instead of the concave portion 6a provided on the flange portion 6 of the fuel injection valve 2, a concave portion that is recessed toward the fuel supply pipe 1a side on the lower end surface 4a of the fuel injection valve assembly portion 4 is provided. 4d is provided. The concave shaped portion 4d has an inner peripheral surface 4da and a bottom surface 4db. The metal O-ring 5 is disposed in the concave portion 4d.

凹形状部４ｄの内周面４ｄａ及び底面４ｄｂは、実施例１の凹形状部６ａの内周面６ａａ及び底面６ａｂと同様に機能する。   The inner peripheral surface 4da and the bottom surface 4db of the concave shape portion 4d function in the same manner as the inner peripheral surface 6aa and the bottom surface 6ab of the concave shape portion 6a of the first embodiment.

本実施例は、凹形状部４ｄに係る構成が実施例１と異なっており、その他の構成は実施例１と同様である。従って、本実施例は実施例１と同様の作用効果を奏する。   The present embodiment is different from the first embodiment in the configuration related to the concave portion 4d, and the other configurations are the same as those in the first embodiment. Therefore, the present embodiment has the same effects as the first embodiment.

また、実施例１及び実施例２の変形例として、金属Ｏリング５を配設する凹形状部を、燃料噴射弁組付部４と燃料噴射弁２のフランジ部６との両方に設けることも可能である。   As a modification of the first embodiment and the second embodiment, a concave portion in which the metal O-ring 5 is disposed may be provided in both the fuel injection valve assembly portion 4 and the flange portion 6 of the fuel injection valve 2. Is possible.

本発明に係る実施例１及び実施例２によれば、燃料噴射弁２を燃料供給配管１ａに吊下げて支持する方式の燃料配管アセンブリ1において、燃料供給配管1ａの燃料噴射弁組付部４の軸心ズレとエンジン７の燃料噴射弁装着孔７ａａの軸心ズレとがあっても、Ｃ断面形状の金属Ｏリングは上述した平面シール構造をとる為、燃料噴射弁組付部４と燃料噴射弁２との連結部で、燃料噴射弁組付部４と燃料噴射弁装着孔７ａａとの軸心ズレを吸収することができる。また、シール部材５を配する燃料噴射弁組付部４の下端面４ａ、または燃料噴射弁２の基端部２ｂの端面６ｃは、平面、もしくは、単純な凹形状溝を形成すれば良く、大きな構造の変更を必要としない。従って、燃料噴射弁２は軸心ズレによる過重に対抗する高強度材や形状及び構造を採用する必要がなくなるので、コストダウンにつながる。   According to the first and second embodiments of the present invention, in the fuel pipe assembly 1 in which the fuel injection valve 2 is suspended and supported by the fuel supply pipe 1a, the fuel injection valve assembly 4 of the fuel supply pipe 1a is supported. Even if there is an axial misalignment of the engine 7 and the axial misalignment of the fuel injection valve mounting hole 7aa of the engine 7, the metal O-ring having the C cross-sectional shape has the above-described flat seal structure. The connecting portion with the injection valve 2 can absorb axial misalignment between the fuel injection valve assembly portion 4 and the fuel injection valve mounting hole 7aa. Further, the lower end surface 4a of the fuel injection valve assembly portion 4 for disposing the seal member 5 or the end surface 6c of the base end portion 2b of the fuel injection valve 2 may be a flat surface or a simple concave groove. Does not require major structural changes. Therefore, the fuel injection valve 2 does not need to adopt a high-strength material, shape, and structure that resists overload due to axial misalignment, leading to cost reduction.

本発明は上記実施例に限定されることなく幅広く変形実施することができる。例えば、上記実施例は筒内噴射エンジン（筒内噴射内燃機関）用の燃料配管アセンブリに本発明を適用したものであるが、ポート噴射エンジン用の燃料配管アセンブリに適用してもよいし、ディーゼルエンジン用の燃料噴射アセンブリ等に適用してもよい。また、燃料噴射弁２の吊り下げ部材に形成する係止部や燃料噴射弁２につけられる軸方向変位規制手段および径方向変位規制手段についても、上記実施例の構成に限定されるものではない。   The present invention is not limited to the above embodiments and can be widely modified. For example, in the above embodiment, the present invention is applied to a fuel pipe assembly for a cylinder injection engine (cylinder injection internal combustion engine). However, the present invention may be applied to a fuel pipe assembly for a port injection engine. You may apply to the fuel-injection assembly for engines, etc. Further, the locking portion formed on the suspension member of the fuel injection valve 2 and the axial direction displacement restricting means and the radial direction displacement restricting means attached to the fuel injection valve 2 are not limited to the configuration of the above embodiment.

１…燃料配管アセンブリ、１ａ…燃料供給配管、２…燃料噴射弁、３…締結ナット、４…燃料噴射弁組付部（インジェクタカップ）、４ｄ…凹形状部、５…シール部材（金属Ｏリング）、６…フランジ部、６ａ…凹形状部、７…エンジン、７ａ…燃料噴射弁装着孔、７ｂ…燃料噴射弁２のノズル装着孔、８…軸心ズレ。   DESCRIPTION OF SYMBOLS 1 ... Fuel piping assembly, 1a ... Fuel supply piping, 2 ... Fuel injection valve, 3 ... Fastening nut, 4 ... Fuel injection valve assembly part (injector cup), 4d ... Concave-shaped part, 5 ... Seal member (metal O-ring) ), 6 ... flange portion, 6a ... concave portion, 7 ... engine, 7a ... fuel injection valve mounting hole, 7b ... nozzle mounting hole of fuel injection valve 2, 8 ... axial misalignment.

Claims (4)

複数の燃料噴射弁と、前記燃料噴射弁が組み付けられる燃料噴射弁組付部を複数有し燃料が流通する燃料供給配管と、前記燃料噴射弁の中心軸線に沿う方向に前記燃料噴射弁に延設された燃料通路と、前記燃料噴射弁組付部の中心軸線に沿う方向に前記燃料噴射弁組付部に延設された燃料通路と、を備えた燃料配管アセンブリにおいて、
前記燃料噴射弁と前記燃料噴射弁組付部との相互に当接する当接面の少なくともいずれか一方の当接面に凹形状部を有し、
前記燃料噴射弁と前記燃料噴射弁組付部とのうち、前記凹形状部が設けられた当接面を有する方に設けられた前記燃料通路が、前記凹形状部の底面に開口し、
前記凹形状部に、前記凹形状部の内周面及び底面と、前記凹形状部が形成された当接面に当接する他方の当接面とに圧接して、燃料をシールするシール部材を設け、
前記シール部材は、環状の金属製部材で構成されると共に、前記燃料噴射弁の中心軸線に沿う方向の断面が開放部を有するアルファベットのＣの字の形状をしており、
前記Ｃの字の形状の前記開放部は内周側に位置し、前記燃料通路に対向していることを特徴とする燃料配管アセンブリ。 A plurality of fuel injection valves; a fuel supply pipe having a plurality of fuel injection valve assembly parts to which the fuel injection valves are assembled; and a fuel supply pipe through which fuel circulates; and extends to the fuel injection valve in a direction along a central axis of the fuel injection valve. A fuel pipe assembly comprising: a fuel passage provided ; and a fuel passage extending to the fuel injection valve assembly in a direction along a central axis of the fuel injection valve assembly;
A concave shape portion on at least one of the contact surfaces of the fuel injection valve and the fuel injection valve assembly portion that contact each other;
Of the fuel injection valve and the fuel injection valve assembly portion, the fuel passage provided on the side having the contact surface provided with the concave shape portion opens to the bottom surface of the concave shape portion,
A seal member that seals the fuel by pressing the concave shape portion against the inner peripheral surface and the bottom surface of the concave shape portion and the other abutting surface that abuts the abutting surface on which the concave shape portion is formed; Provided ,
The seal member is formed of an annular metal member, and the cross section in the direction along the central axis of the fuel injection valve has an alphabet C shape having an open portion,
The fuel pipe assembly, wherein the C-shaped opening is located on an inner peripheral side and faces the fuel passage . 請求項１に記載の燃料配管アセンブリにおいて、
前記燃料噴射弁組付部は外周面にねじ溝が形成され、
前記燃料噴射弁の基端部に内周面にねじ溝が形成された締結部材を備え、
前記締結部材が前記燃料噴射弁組付部に締結されることにより、前記燃料噴射弁は前記燃料噴射弁組付部に対して固定され、前記締結部材の前記燃料噴射弁組付部への締結時に前記燃料噴射弁は前記燃料噴射弁組付部の中心軸線に垂直な方向に変位可能に構成されていることを特徴とする燃料配管アセンブリ。 The fuel pipe assembly of claim 1, wherein
The fuel injection valve assembly is formed with a thread groove on the outer peripheral surface,
A fastening member having a thread groove formed on an inner peripheral surface at a base end portion of the fuel injection valve;
When the fastening member is fastened to the fuel injection valve assembly portion, the fuel injection valve is fixed to the fuel injection valve assembly portion, and the fastening member is fastened to the fuel injection valve assembly portion. The fuel pipe assembly is characterized in that the fuel injection valve is sometimes configured to be displaceable in a direction perpendicular to a central axis of the fuel injection valve assembly. 基端部を燃料供給配管の燃料噴射弁組付部に組み付けられ、先端部をエンジンの燃料噴射弁装着孔に挿入されて組み付けられる燃料噴射弁であって、前記燃料噴射弁の中心軸線に沿う方向に前記燃料噴射弁に延設された燃料通路を有する燃料噴射弁において、
前記燃料噴射弁組付部の端面と当接する当接面に先端部側に向かって窪んだ凹形状部を有し、
前記燃料通路が前記凹形状部の底面に開口し、
前記凹形状部に、前記凹形状部の内周面及び底面と、前記燃料噴射弁組付部の前記端面とに圧接して、燃料をシールするシール部材を設け、
前記シール部材は、環状の金属製部材で構成されると共に、前記燃料噴射弁の中心軸線に沿う方向の断面が開放部を有するアルファベットのＣの字の形状をしており、
前記Ｃの字の形状の前記開放部は内周側に位置し、前記燃料通路に対向していることを特徴とする燃料噴射弁。 A fuel injection valve having a base end portion assembled to a fuel injection valve assembly portion of a fuel supply pipe and a tip end portion inserted into a fuel injection valve mounting hole of the engine for assembly , which is along the central axis of the fuel injection valve In a fuel injection valve having a fuel passage extending in the direction to the fuel injection valve ,
The contact surface that contacts the end surface of the fuel injection valve assembly portion has a recessed portion that is recessed toward the tip end side;
The fuel passage opens to the bottom surface of the concave portion;
A seal member that seals the fuel is provided in the concave shape portion in pressure contact with the inner peripheral surface and the bottom surface of the concave shape portion and the end surface of the fuel injection valve assembly portion ,
The seal member is formed of an annular metal member, and the cross section in the direction along the central axis of the fuel injection valve has an alphabet C shape having an open portion,
The fuel injection valve, wherein the C-shaped opening is located on the inner peripheral side and faces the fuel passage . 燃料噴射弁の基端部が組み付けられる燃料噴射弁組付部を有する燃料供給配管であって、前記燃料噴射弁組付部の中心軸線に沿う方向に前記燃料噴射弁組付部に延設された燃料通路を有する燃料供給配管において、
前記燃料噴射弁の基端部の端面と当接する前記燃料噴射弁組付部の当接面に、前記燃料噴射弁の基端部側とは反対側に向かって窪んだ凹形状部を有し、
前記燃料通路が前記凹形状部の底面に開口し、
前記凹形状部に、前記凹形状部の内周面及び底面と、前記燃料噴射弁の前記基端部の前記端面とに圧接して、燃料をシールするシール部材を設け、
前記シール部材は、環状の金属製部材で構成されると共に、前記燃料噴射弁の中心軸線に沿う方向の断面が開放部を有するアルファベットのＣの字の形状をしており、
前記Ｃの字の形状の前記開放部は内周側に位置し、前記燃料通路に対向していることを特徴とする燃料供給配管。 A fuel supply pipe having a fuel injection valve assembly portion to which a base end portion of the fuel injection valve is assembled, and extends to the fuel injection valve assembly portion in a direction along a central axis of the fuel injection valve assembly portion. In a fuel supply pipe having a fuel passage
The contact surface of the fuel injection valve assembly that contacts the end surface of the base end portion of the fuel injection valve has a concave portion that is recessed toward the side opposite to the base end side of the fuel injection valve. ,
The fuel passage opens to the bottom surface of the concave portion;
A seal member that seals fuel by providing pressure contact with the inner peripheral surface and the bottom surface of the concave shape portion and the end surface of the base end portion of the fuel injection valve is provided in the concave shape portion ,
The seal member is formed of an annular metal member, and the cross section in the direction along the central axis of the fuel injection valve has an alphabet C shape having an open portion,
The fuel supply pipe, wherein the C-shaped open portion is located on an inner peripheral side and faces the fuel passage .
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