JP6141718B2 - High pressure fuel delivery pipe for direct injection engines - Google Patents

High pressure fuel delivery pipe for direct injection engines Download PDF

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JP6141718B2
JP6141718B2 JP2013166629A JP2013166629A JP6141718B2 JP 6141718 B2 JP6141718 B2 JP 6141718B2 JP 2013166629 A JP2013166629 A JP 2013166629A JP 2013166629 A JP2013166629 A JP 2013166629A JP 6141718 B2 JP6141718 B2 JP 6141718B2
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fuel passage
injection valve
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passage pipe
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JP2015034533A (en
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成樹 原田
成樹 原田
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マルヤス工業株式会社
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Description

この発明は、エンジンの燃焼室内に燃料を直接噴射する直噴エンジンに使用する高圧燃料デリバリパイプに関し、より詳しくは、燃料噴射弁を連通保持する噴射弁ソケットの燃料通路管本体への連結構造に関する。   The present invention relates to a high-pressure fuel delivery pipe for use in a direct injection engine that directly injects fuel into a combustion chamber of the engine, and more particularly, to a structure for connecting an injection valve socket for holding a fuel injection valve to a fuel passage pipe body. .

複数気筒の内燃機関で構成された自動車のエンジンにおいては、燃焼室内に燃料を直接噴射する直噴エンジンの場合、エンジンの各気筒の燃焼室に燃料を高圧で供給するためにデリバリパイプが設けられており、そのデリバリパイプは、高圧燃料ポンプから加圧された燃料が供給される燃料通路管本体と、その燃料通路管本体に固着されコントロールユニットにより開閉制御される燃料噴射弁を燃料通路管本体に対して連通させて保持するソケット孔が形成された複数の噴射弁ソケットと、同じく燃料通路管本体に固着されエンジンに取り付けるための取付孔が形成された複数の取付ボスとを備えて構成されている。   In an automobile engine composed of a multi-cylinder internal combustion engine, in the case of a direct injection engine that directly injects fuel into a combustion chamber, a delivery pipe is provided to supply fuel to the combustion chamber of each cylinder of the engine at a high pressure. The delivery pipe includes a fuel passage pipe body to which pressurized fuel is supplied from a high pressure fuel pump, and a fuel injection valve fixed to the fuel passage pipe body and controlled to be opened and closed by a control unit. A plurality of injection valve sockets formed with socket holes that communicate with and hold, and a plurality of mounting bosses that are fixedly attached to the fuel passage pipe body and formed with mounting holes for mounting on the engine. ing.

一般に、直噴エンジンにおいては、デリバリパイプは、燃料通路管本体がエンジンの各気筒の上方にその軸線方向を水平方向に向けて配置されており、その燃料通路管本体の複数箇所の各箇所において1個の噴射弁ソケットと1個の取付ボスが、それぞれソケット孔と取付孔の軸線方向を燃料通路管本体の軸線方向と垂直にして上下方向に向けて燃料通路管本体に固着されて設けられている。   In general, in a direct injection engine, a delivery pipe has a fuel passage pipe body disposed above each cylinder of the engine with its axial direction oriented horizontally, and at each of a plurality of locations of the fuel passage pipe body. One injection valve socket and one mounting boss are fixedly attached to the fuel passage tube main body in the vertical direction with the axial direction of the socket hole and the mounting hole being perpendicular to the axial direction of the fuel passage tube main body. ing.

この種の直噴エンジン用高圧燃料デリバリパイプとしては、例えば、特許文献1(米国公開特許2009/0145504号公報)に開示されたものがある。このデリバリパイプは、水平方向に配置された細長の円筒状の燃料通路管本体の複数箇所の各箇所において、噴射弁ソケット固着用と取付ボス固着用の凹部を燃料通路管本体の外周から軸線を垂直方向とする円柱面状に削成し、当該凹部にそれぞれ軸線を垂直方向とする円筒状の噴射弁ソケットと取付ボスをそれぞれろう付けして、構成されている。   An example of this type of high-pressure fuel delivery pipe for a direct injection engine is disclosed in Patent Document 1 (US Publication No. 2009/0145504). This delivery pipe is provided with a recess for fixing an injection valve socket and a fixing boss at each of a plurality of locations of an elongated cylindrical fuel passage tube body arranged in a horizontal direction, with an axis line extending from the outer periphery of the fuel passage tube body. A cylindrical injection valve socket and a mounting boss, each of which is cut into a vertical cylindrical surface and whose axis is in the vertical direction, are brazed.

米国公開特許2009/0145504号公報US Published Patent No. 2009/0145504

しかし、このような従来技術では、燃料通路管本体にその外周から個々に円柱面状の凹部を削成しなければならず、加工製作に手間が掛かり、また、個々の噴射弁ソケットおよび取付ボスの固着強度は、それぞれの部品単独としての燃料通路管本体に対する固着状態に依存し、生産性および信頼性の面で改善することが望まれる。また、使用年月の経過に伴って固着箇所が腐食しにくい構造が望まれる。   However, in such a conventional technique, it is necessary to cut the cylindrical surface-shaped recesses individually from the outer periphery of the fuel passage pipe body, which takes time and labor for the processing, and the individual injection valve sockets and mounting bosses. The fixing strength depends on the state of fixing to the fuel passage pipe body as each component alone, and it is desired to improve in terms of productivity and reliability. In addition, a structure in which the fixed portion is less likely to corrode with the passage of use is desired.

この発明は、そのような従来技術に対する改善を達成しようというもので、加工製作の手間を減らし、個々の噴射弁ソケットおよび取付ボスの固着強度を十分に確保することを目的とする。   An object of the present invention is to achieve such an improvement over the prior art, and it is an object of the present invention to reduce the labor of manufacturing and secure sufficient fixing strength of individual injection valve sockets and mounting bosses.

上記目的を達成するために、この発明は、高圧燃料ポンプから加圧された燃料が供給される燃料通路管本体と、燃料通路管本体の軸線方向の複数箇所においてその各箇所に固着された1個の噴射弁ソケットと、その同じ各箇所に固着された1個の取付ボスとを備えて構成され、噴射弁ソケットには、コントロールユニットにより開閉制御される燃料噴射弁を燃料通路管本体に対して連通させて保持するソケット孔が形成されており、取付ボスには、エンジンに取り付けるための取付孔が形成されている、直噴エンジン用高圧燃料デリバリパイプであって、燃料通路管本体は、細長の円筒状でその軸線方向を水平方向に向けて配置され、噴射弁ソケットおよび取付ボスが固着される箇所において、円筒状の側面軸線に向かって押しつぶされて垂直な平面状の凹壁部形成されてなり、噴射弁ソケットおよび取付ボスが固着される燃料通路管本体の各箇所において、噴射弁ソケットは、そのソケット孔の軸線方向を燃料通路管本体の軸線方向と垂直に上下方向に向けて燃料通路管本体の凹壁部に固着されており、取付ボスは、その取付孔の軸線方向を燃料通路管本体の軸線方向と垂直に上下方向に向けて噴射弁ソケットと並んで燃料通路管本体の凹壁部に固着されており、取付ボスの燃料通路管本体に固着されている側と反対側の外周面と、噴射弁ソケットの燃料通路管本体に固着されている側と反対側の外周面と、燃料通路管本体の凹壁部とに跨がって把持部材固着されることにより、把持部材によって噴射弁ソケットが取付ボスの外周面から燃料通路管本体の凹壁部に架けて把持されていることを特徴とする直噴エンジン用高圧燃料デリバリパイプ、を提供する。 In order to achieve the above object, the present invention provides a fuel passage pipe body to which pressurized fuel is supplied from a high-pressure fuel pump, and a plurality of points fixed in the axial direction of the fuel passage pipe body. Each of the injection valve sockets and one mounting boss fixed to each of the same sockets. The injection valve socket includes a fuel injection valve that is controlled to be opened and closed by a control unit. A socket hole for communicating and holding is formed, and a mounting boss is formed with a mounting hole for mounting to the engine, a high pressure fuel delivery pipe for a direct injection engine, disposed toward the axial horizontally elongated cylindrical, at a point where the injection valve socket and mounting bosses are fixed, cylindrical sides is grain pushed toward the axis It is formed concave wall portion of the straight planar, at each location in the fuel passage pipe body injector sockets and mounting boss is fixed, the injection valve socket, the axial fuel passage tube body of the socket hole The mounting boss is fixed to the concave wall portion of the fuel passage pipe body in the vertical direction perpendicular to the axial direction, and the mounting boss has the axial direction of the mounting hole directed in the vertical direction perpendicular to the axial direction of the fuel passage pipe body. Nde injector socket and parallel is fixed to the recessed wall portion of the fuel passage pipe main body, the side that is secured to the fuel passage pipe main body of the mounting boss and opposite the outer peripheral surface of the fuel passage pipe main body of the injection valve socket fuel and secured to it are side and opposite the outer peripheral surface of the Rukoto gripping member affixed straddling the concave wall portion of the fuel passage pipe body, injector socket by the gripping member from the outer peripheral surface of the mounting boss bunch over the concave wall of the passage tube body It is to provide a high pressure fuel delivery pipe, for a direct injection engine, characterized in that.

把持部材は、取付ボスから見て噴射弁ソケットと反対側にも延長して燃料通路管本体の外周面に固着すると好都合である。   The gripping member is advantageously extended to the side opposite to the injection valve socket as viewed from the mounting boss and secured to the outer peripheral surface of the fuel passage pipe body.

把持部材は、噴射弁ソケットに固着された箇所を含む部分から上方に延び噴射弁ソケットの上端を跨いで屈曲させた屈曲片部を形成して、その屈曲片部を燃料通路管本体の上面の外周面に固着すると、さらに好都合である。   The grip member extends upward from a portion including the portion fixed to the injection valve socket to form a bent piece portion that is bent over the upper end of the injection valve socket, and the bent piece portion is formed on the upper surface of the fuel passage main body. It is more convenient if it adheres to the outer peripheral surface.

この発明によれば、燃料通路管本体の噴射弁ソケットおよび取付ボスを固着する箇所に垂直な平面状の凹壁部を形成して、その凹壁部に、ソケット孔の軸線方向を燃料通路管本体の軸線方向と垂直に上下方向に向けて噴射弁ソケットを固着し、取付孔の軸線方向を燃料通路管本体の軸線方向と垂直に上下方向に向けて取付ボスを固着するとともに、噴射弁ソケットの燃料通路管本体に固着されている側と反対側の外周面を把持部材の中央部近傍に固着して、当該把持部材を取付ボスの外周面から燃料通路管本体の外周面に架けて渡して固着したので、加工製作の工程が簡単になり、かつ、個々の噴射弁ソケットおよび取付ボスの固着強度を十分に確保することができる。   According to the present invention, the planar concave wall portion perpendicular to the portion where the injection valve socket and the mounting boss of the fuel passage pipe main body are fixed is formed, and the axial direction of the socket hole is defined in the concave wall portion in the fuel passage pipe. The injection valve socket is fixed in the vertical direction perpendicular to the axial direction of the main body, the mounting boss is fixed in the vertical direction perpendicular to the axial direction of the fuel passage pipe main body, and the injection valve socket. The outer peripheral surface opposite to the side fixed to the fuel passage main body is fixed to the vicinity of the center portion of the gripping member, and the gripping member is bridged from the outer peripheral surface of the mounting boss to the outer peripheral surface of the fuel passage main body. Therefore, the process of manufacturing and manufacturing is simplified, and the fixing strength of the individual injection valve sockets and mounting bosses can be sufficiently secured.

また、把持部材の燃料通路管本体の外周面に固着されている端部近傍を、燃料通路管本体の凹壁部に固着すると、その部分が平面同士の固着となり、製造性が良好で、固着強度が向上する。さらに、把持部材に、その中央部から上方に延びて噴射弁ソケットの上端を跨いで屈曲させた屈曲片部を形成して、その屈曲片部を燃料通路管本体の上面の外周面に固着する構造を採ると、エンジン運転時に上向きの強い力が掛かる噴射弁ソケットの燃料通路管本体への固着強度がより一層向上し、また、噴射弁ソケットと燃料通路管本体の固着箇所や燃料通路管本体の上面に腐食性の塩水や塵埃が溜まり難くなり、耐久性も向上する。   In addition, when the vicinity of the end fixed to the outer peripheral surface of the fuel passage tube main body of the gripping member is fixed to the concave wall portion of the fuel passage main body, the portion is fixed to the flat surface, and the productivity is good and the fixing Strength is improved. Further, the grip member is formed with a bent piece extending upward from the central portion thereof and bent over the upper end of the injection valve socket, and the bent piece is fixed to the outer peripheral surface of the upper surface of the fuel passage main body. When the structure is adopted, the strength of fixing the injection valve socket to the fuel passage tube main body, which applies a strong upward force when the engine is operating, is further improved. Corrosive salt water and dust are less likely to accumulate on the upper surface of the surface, improving durability.

この発明による直噴エンジン用高圧燃料デリバリパイプの第一の実施形態の全体構造を示す側面図である。1 is a side view showing an overall structure of a first embodiment of a high-pressure fuel delivery pipe for a direct injection engine according to the present invention. 図1のデリバリパイプの平面図である。It is a top view of the delivery pipe of FIG. 図1のデリバリパイプのIII−III線に沿った断面図である。It is sectional drawing along the III-III line of the delivery pipe of FIG. 図1のデリバリパイプの底面図である。It is a bottom view of the delivery pipe of FIG. 図1のデリバリパイプのV−V線に沿った断面図である。It is sectional drawing along the VV line of the delivery pipe of FIG. 図1のデリバリパイプのVI−VI線に沿った断面図である。It is sectional drawing along the VI-VI line of the delivery pipe of FIG. この発明による直噴エンジン用高圧燃料デリバリパイプの第二の実施形態の全体構造を示す、図1に相当する側面図である。It is a side view equivalent to FIG. 1 which shows the whole structure of 2nd embodiment of the high pressure fuel delivery pipe for direct injection engines by this invention. 図7のデリバリパイプの、図2に相当する平面図である。FIG. 8 is a plan view of the delivery pipe of FIG. 7 corresponding to FIG. 2. 図7のデリバリパイプのIX−IX線に沿った断面図である。It is sectional drawing along the IX-IX line of the delivery pipe of FIG. この発明のデリバリパイプにおける燃料通路管本体の加工形態の変形例を示す断面図である。It is sectional drawing which shows the modification of the processing form of the fuel channel pipe main body in the delivery pipe of this invention.

以下、図面を参照しながら、この発明による直噴エンジン用高圧燃料デリバリパイプの実施形態を説明する。   Hereinafter, embodiments of a high-pressure fuel delivery pipe for a direct injection engine according to the present invention will be described with reference to the drawings.

図1〜3に示す第一の実施形態において、直噴エンジン用高圧燃料デリバリパイプ10は、直列4気筒の直噴型エンジンに用いられるものであり、高圧燃料ポンプから加圧された燃料が供給される燃料通路管本体11の軸線方向の4箇所においてその各箇所に1個の噴射弁ソケット13と1個の取付ボス12が固着されて構成されている。燃料通路管本体11は、押し出し成型された一本の細長い円筒状体をその軸線方向(長手方向)の4箇所でその側面から軸線に向かって押しつぶし加工して垂直な平面状の凹壁部11aを形成してなるもので、その軸線方向を水平方向に向けて配置される燃料通路管本体11に対して、各凹壁部11aの箇所において、1個の取付ボス12および1個の噴射弁ソケット13が各軸線方向を上下方向に向けて並んで固着されている。燃料通路管本体11は、両端が止め栓17で塞がれていて、内部に燃料通路20が形成されている。取付ボス12には、エンジンに取り付けるための取付孔30がその軸線方向を上下方向に向けて形成されており、噴射弁ソケット13には、コントロールユニットにより開閉制御される燃料噴射弁40(図1に二点鎖線で図示)を燃料通路管本体11に対して連通させて保持するソケット孔23がその軸線方向を上下方向に向けて形成されている。   In the first embodiment shown in FIGS. 1 to 3, the high-pressure fuel delivery pipe 10 for a direct-injection engine is used for an in-line four-cylinder direct-injection engine, and is supplied with pressurized fuel from a high-pressure fuel pump. The fuel passage pipe main body 11 is configured such that one injection valve socket 13 and one mounting boss 12 are fixed to each of the four locations in the axial direction of the fuel passage pipe main body 11. The fuel passage tube main body 11 is formed by crushing one extruded cylindrical body at four locations in the axial direction (longitudinal direction) from its side surface toward the axial line, thereby forming a vertical flat concave wall portion 11a. In relation to the fuel passage pipe main body 11 whose axial direction is oriented horizontally, one mounting boss 12 and one injection valve are provided at each concave wall portion 11a. The socket 13 is fixed in a line with each axial direction facing up and down. Both ends of the fuel passage main body 11 are closed with stopper plugs 17, and a fuel passage 20 is formed inside. A mounting hole 30 for mounting to the engine is formed in the mounting boss 12 with its axial direction directed vertically, and a fuel injection valve 40 (FIG. 1) that is controlled to open and close by the control unit. A socket hole 23 for holding the fuel passage tube body 11 in communication with the fuel passage tube main body 11 is formed with its axial direction facing up and down.

取付ボス12と噴射弁ソケット13を平面状の凹壁部11aに固着する構造を採用することにより、燃料通路管本体11の水平方向の円柱状部分に固着する場合に比べて、固着加工工程が簡単で、かつ、より高い固着強度が期待される。   By adopting a structure in which the mounting boss 12 and the injection valve socket 13 are fixed to the planar concave wall portion 11a, the fixing process is performed as compared with the case of fixing to the horizontal cylindrical portion of the fuel passage main body 11. Simple and higher bond strength is expected.

燃料通路管本体11と噴射弁ソケット13の固着箇所では、燃料通路管本体11の凹壁部11aにソケット孔23に連通するための連通孔21が穿設されており、噴射弁ソケット13に燃料通路20に連通するための連通孔22が穿設されており、両者連通孔21、22を整合させることにより燃料通路20がソケット孔23に連通している(図3を参照)。なお、固着する製造工程としては、燃料通路管本体11の凹壁部11aに取付ボス12と噴射弁ソケット13を位置決めして溶接により仮留めした後に、ろう付けにより隙間にろうを流し込んで完全に密着させる。符号18は、燃料ポンプからの高圧燃料の供給を受けるための連結部を示し、符号19は、圧力センサに接続するための連結部を示す。   At the location where the fuel passage pipe main body 11 and the injection valve socket 13 are fixed, a communication hole 21 for communicating with the socket hole 23 is formed in the concave wall portion 11 a of the fuel passage pipe main body 11. A communication hole 22 for communicating with the passage 20 is formed, and the fuel passage 20 communicates with the socket hole 23 by aligning the communication holes 21 and 22 (see FIG. 3). As a manufacturing process to be fixed, the mounting boss 12 and the injection valve socket 13 are positioned on the concave wall portion 11a of the fuel passage main body 11 and temporarily fixed by welding, and then solder is poured into the gap by brazing. Adhere closely. Reference numeral 18 indicates a connecting part for receiving the supply of high-pressure fuel from the fuel pump, and reference numeral 19 indicates a connecting part for connecting to the pressure sensor.

この発明では、さらに把持部材14を設けて、把持部材14により噴射弁ソケット13をその背面側(燃料通路管本体11に固着されている側と反対側)で取付ボス12から燃料通路管本体11に架けて跨いで把持している。つまり、把持部材14の中央部近傍を噴射弁ソケット13の背面側の外周面に固着するとともに、把持部材14の一方の端部近傍14aを取付ボス12の背面側の外周面に固着し、把持部材14の他方の端部近傍14bを燃料通路管本体11の外周面に凹壁部11aの箇所で固着してある。この実施形態では、把持部材14は、その中央部近傍から上方に延び噴射弁ソケット13の上端を跨いで屈曲させた屈曲片部14cを有し、この屈曲片部14cの先端近傍が燃料通路管本体11の上面の外周面に固着されている。図示の例では、屈曲片部14cは、燃料通路管本体11の上面に被さって固着される部分が燃料通路管本体11に沿って図中右方向に延長して広げられている。   In the present invention, a gripping member 14 is further provided, and the fuel valve pipe body 11 from the mounting boss 12 on the back surface side (the side opposite to the side fixed to the fuel path pipe body 11) of the injection valve socket 13 by the gripping member 14. It is straddling over and gripping. That is, the vicinity of the center portion of the gripping member 14 is fixed to the outer peripheral surface on the back side of the injection valve socket 13, and one end portion vicinity 14 a of the gripping member 14 is fixed to the outer peripheral surface of the mounting boss 12 on the rear side. The vicinity 14b of the other end of the member 14 is fixed to the outer peripheral surface of the fuel passage pipe body 11 at the location of the concave wall portion 11a. In this embodiment, the gripping member 14 has a bent piece portion 14c that extends upward from the vicinity of the central portion thereof and is bent across the upper end of the injection valve socket 13, and the vicinity of the distal end of the bent piece portion 14c is a fuel passage pipe. The main body 11 is fixed to the outer peripheral surface of the upper surface. In the example shown in the drawing, the bent piece portion 14c is widened so that the portion that covers and adheres to the upper surface of the fuel passage pipe body 11 extends along the fuel passage pipe body 11 in the right direction in the figure.

このような構造とすることにより、エンジン運転時に上向きの強い力が掛かる噴射弁ソケット13の燃料通路管本体11への固着強度がより一層増すことになり、デリバリパイプの信頼性がより一層向上する。さらに、エンジン内の環境条件としては、デリバリパイプの上面側および取付ボス12や噴射弁ソケット13の固着箇所周辺は、走行中に跳ね上がる泥や雨水、さらには、融氷剤の塩化カルシウムなど腐食性の塵埃が付着することで、腐食のおそれも出てくることから、この実施形態のように噴射弁ソケット13の固着箇所や燃料通路管本体11の上面の一部が上から覆われていると、その分だけ噴射弁ソケット13や燃料通路管本体11、及びその固着箇所が腐食する事態が減少する。   By adopting such a structure, the fixing strength of the injection valve socket 13 to which the strong upward force is applied during engine operation to the fuel passage pipe body 11 is further increased, and the reliability of the delivery pipe is further improved. . Further, as environmental conditions in the engine, the upper surface side of the delivery pipe and the vicinity of the fixing boss 12 and the injection valve socket 13 are corrosive such as mud and rain water splashing during running, and calcium melt as a melting agent. Since the risk of corrosion also arises due to the adhesion of the dust, if the adhering portion of the injection valve socket 13 or a part of the upper surface of the fuel passage main body 11 is covered from above as in this embodiment. Therefore, the situation where the injection valve socket 13, the fuel passage pipe main body 11, and the fixing portion thereof corrode is reduced.

把持部材14について、図5、6を併せて参照しながらさらに説明すると、把持部材14の下端縁は、取付ボス12に固着された側の端部から噴射弁ソケット13の外周を廻った辺りまで、外側に向けて折り曲げてフランジ部14fが形成されており、把持部材14の上端縁は、屈曲片部14cが延び出している箇所の手前までの取付ボス12を覆っている範囲で、外側に向けて折り曲げてフランジ部14eが形成されている。フランジ部14e、14fは、把持部材14の平面部の剛性を持たせる役割をしている。把持部材14の屈曲片部14cが噴射弁ソケット13の上端を跨いで燃料通路管本体11の上面の外周面に固着されている様子が、図6に明確に示されている。把持部材14の屈曲片部14cの先端近傍が燃料通路管本体11の上面の外周面に固着されていることによって、さらに噴射弁ソケット13の燃料通路管本体11に対する固着強度が増大する。また、取付ボス12の側から見ても、把持部材14により噴射弁ソケット13と連結されていることで、取付構造的にも強度が向上している。   The gripping member 14 will be further described with reference to FIGS. 5 and 6. The lower end edge of the gripping member 14 extends from the end on the side fixed to the mounting boss 12 to around the periphery of the injection valve socket 13. The flange portion 14f is formed by bending outward, and the upper end edge of the gripping member 14 is outside as long as it covers the mounting boss 12 up to the point where the bent piece portion 14c extends. The flange part 14e is formed by bending toward it. The flange portions 14e and 14f serve to give the rigidity of the flat portion of the gripping member 14. A state in which the bent piece 14c of the gripping member 14 is fixed to the outer peripheral surface of the upper surface of the fuel passage pipe body 11 across the upper end of the injection valve socket 13 is clearly shown in FIG. Since the vicinity of the tip of the bent piece 14c of the gripping member 14 is fixed to the outer peripheral surface of the upper surface of the fuel passage pipe main body 11, the fixing strength of the injection valve socket 13 to the fuel passage pipe main body 11 is further increased. Further, even when viewed from the mounting boss 12 side, the strength is improved in terms of the mounting structure by being connected to the injection valve socket 13 by the gripping member 14.

次に、上記の第一の実施形態の一部分を変形した第二の実施形態について、図7〜9を参照しながら説明する。この実施形態は、第一の実施形態における把持部材14から屈曲片部14cを省略したもので、図7と図1、図8と図2、図9と図6をそれぞれ比べて分かるように、把持部材15は、噴射弁ソケット13をその背面側で取付ボス12から燃料通路管本体11に架けて跨いで把持している。つまり、把持部材15の中央部近傍を噴射弁ソケット13の背面側の外周面に固着するとともに、把持部材15の一方の端部近傍15aを取付ボス12の背面側の外周面に固着し、把持部材15の他方の端部近傍15bを燃料通路管本体11の外周面に凹壁部11aの箇所で固着してある。この第二の実施形態では、把持部材15は、その上端縁が全長に亘って外側に向けて折り曲げられてフランジ部15eが形成されており、フランジ部15eは、取付ボス12に固着された側の端部から燃料通路管本体11の凹壁部11aに固着された側の端部まで続いている。下端縁も同様に外側に向けて折り曲げられてフランジ部15fが形成されているが、フランジ部15fは、第一の実施形態の場合と同様に、取付ボス12に固着された側の端部から噴射弁ソケット13の外周を廻った辺りまで形成されており、それより先には対応する高さ位置に燃料通路管本体11が存在しないので、延長されていない。   Next, a second embodiment obtained by modifying a part of the first embodiment will be described with reference to FIGS. In this embodiment, the bent piece portion 14c is omitted from the gripping member 14 in the first embodiment, and as can be seen by comparing FIG. 7 and FIG. 1, FIG. 8 and FIG. 2, and FIG. The gripping member 15 grips the injection valve socket 13 across the fuel passage pipe body 11 from the mounting boss 12 on the back side thereof. That is, the vicinity of the center portion of the gripping member 15 is fixed to the outer peripheral surface on the back side of the injection valve socket 13, and one end portion vicinity 15 a of the gripping member 15 is fixed to the outer peripheral surface on the back side of the mounting boss 12. The other end portion 15b of the member 15 is fixed to the outer peripheral surface of the fuel passage main body 11 at the concave wall portion 11a. In the second embodiment, the gripping member 15 has a flange portion 15e formed by bending its upper end edge outward over its entire length, and the flange portion 15e is a side fixed to the mounting boss 12. To the end on the side fixed to the concave wall portion 11a of the fuel passage main body 11. Similarly, the lower end edge is also bent outward to form a flange portion 15f. The flange portion 15f is formed from the end portion on the side fixed to the mounting boss 12 as in the first embodiment. It is formed up to around the outer periphery of the injection valve socket 13, and the fuel passage pipe main body 11 does not exist at a corresponding height before that, so it is not extended.

図7のX−X線に沿った断面は、先に説明した図3と同様な形状を呈し、把持部材15に関する符号が、15,15a、15bとなる以外は、各部を説明する符号は、第一の実施形態の場合と同一である。   The cross-section along the line XX in FIG. 7 has the same shape as that of FIG. 3 described above, and the reference numerals for explaining the respective parts are the same except that the reference numerals for the gripping member 15 are 15, 15a, 15b. This is the same as in the case of the first embodiment.

上記で説明した第一および第二の実施形態では、把持部材14、15を固着した箇所が、噴射弁ソケット13を中に置いて、取付ボス12の背面外周から凹壁部11aまでの範囲であったが、把持部材14、15を取付ボス12から見て噴射弁ソケット13の反対側にも延長して、その延長部分を燃料通路管本体11の外周面に固着する構成とすることもでき、そうすれば、取付ボス12と噴射弁ソケット13両者の燃料通路管本体11への固着強度が向上する。   In the first and second embodiments described above, the location where the gripping members 14 and 15 are fixed is in a range from the rear outer periphery of the mounting boss 12 to the concave wall portion 11a with the injection valve socket 13 placed inside. However, it is also possible to extend the gripping members 14 and 15 to the opposite side of the injection valve socket 13 when viewed from the mounting boss 12 and to fix the extended portion to the outer peripheral surface of the fuel passage main body 11. In this case, the fixing strength of both the mounting boss 12 and the injection valve socket 13 to the fuel passage pipe body 11 is improved.

また、上記で説明した第一および第二の実施形態では、燃料通路管本体11の凹壁部11aは、取付ボス12と噴射弁ソケット13を固着する4箇所のその付近のみを飛び飛びに押しつぶし加工してあるが、図10の断面図に示すように、第1の箇所から第4の箇所までの範囲を一括して押しつぶし加工してもよい。   Further, in the first and second embodiments described above, the concave wall portion 11a of the fuel passage pipe body 11 is crushed only in the vicinity of four places where the mounting boss 12 and the injection valve socket 13 are fixed. However, as shown in the cross-sectional view of FIG. 10, the range from the first location to the fourth location may be crushed together.

以上説明したように、この発明によれば、燃料通路管本体の押しつぶし加工により垂直平面として形成した凹壁部に取付ボスと噴射弁ソケットを固着したので、加工製作が簡単であり、また、把持部材によって噴射弁ソケットを背面から把持して取付ボスと燃料通路管本体に架けて固着したので、噴射弁ソケットおよび取付ボスの燃料通路管本体への固着強度を十分に確保することができる。さらに、把持部材の一部に屈曲片部を設けて、噴射弁ソケットを上から跨いで燃料通路管本体の上面に固着すると、エンジン作動時における噴射弁ソケットの把持強度が増すとともに、固着箇所周辺の腐食のおそれが減少する。   As described above, according to the present invention, the mounting boss and the injection valve socket are fixed to the concave wall portion formed as a vertical flat surface by crushing the fuel passage pipe body, so that the fabrication is simple and the gripping is performed. Since the injection valve socket is gripped from the back surface by the member and secured to the mounting boss and the fuel passage pipe body, the fixing strength of the injection valve socket and the mounting boss to the fuel passage pipe body can be sufficiently secured. In addition, if a bent piece is provided on a part of the gripping member and is fixed to the upper surface of the fuel passage pipe body across the injection valve socket, the gripping strength of the injection valve socket during engine operation increases and the periphery of the fixed part The risk of corrosion is reduced.

10…直噴エンジン用高圧燃料デリバリパイプ、11…燃料通路管本体、11a…凹壁部、12…取付ボス、13…噴射弁ソケット、14…把持部材、14c…屈曲片部、15…把持部材、20…燃料通路、23…ソケット孔、30…取付孔、40…噴射弁。   DESCRIPTION OF SYMBOLS 10 ... High pressure fuel delivery pipe for direct injection engines, 11 ... Fuel passage pipe main body, 11a ... Recessed wall part, 12 ... Mounting boss, 13 ... Injection valve socket, 14 ... Gripping member, 14c ... Bending piece part, 15 ... Gripping member 20 ... Fuel passage, 23 ... Socket hole, 30 ... Mounting hole, 40 ... Injection valve.

Claims (3)

高圧燃料ポンプから加圧された燃料が供給される燃料通路管本体と、前記燃料通路管本体の軸線方向の複数箇所においてその各箇所に固着された1個の噴射弁ソケットと、その同じ各箇所に固着された1個の取付ボスとを備えて構成され、前記噴射弁ソケットには、コントロールユニットにより開閉制御される燃料噴射弁を前記燃料通路管本体に対して連通させて保持するソケット孔が形成されており、前記取付ボスには、エンジンに取り付けるための取付孔が形成されている、直噴エンジン用高圧燃料デリバリパイプであって、
前記燃料通路管本体は、細長の円筒状でその軸線方向を水平方向に向けて配置され、前記噴射弁ソケットおよび前記取付ボスが固着される箇所において、前記円筒状の側面軸線に向かって押しつぶされて垂直な平面状の凹壁部形成されてなり、
前記噴射弁ソケットおよび前記取付ボスが固着される前記燃料通路管本体の各箇所において、
前記噴射弁ソケットは、そのソケット孔の軸線方向を前記燃料通路管本体の軸線方向と垂直に上下方向に向けて前記燃料通路管本体の前記凹壁部に固着されており、
前記取付ボスは、その取付孔の軸線方向を前記燃料通路管本体の軸線方向と垂直に上下方向に向けて前記噴射弁ソケットと並んで前記燃料通路管本体の前記凹壁部に固着されており、
前記取付ボスの前記燃料通路管本体に固着されている側と反対側の外周面と、前記噴射弁ソケットの前記燃料通路管本体に固着されている側と反対側の外周面と、前記燃料通路管本体の前記凹壁部とに跨がって把持部材固着されることにより、前記把持部材によって前記噴射弁ソケットが前記取付ボスの外周面から前記燃料通路管本体の前記凹壁部に架けて把持されている
ことを特徴とする直噴エンジン用高圧燃料デリバリパイプ。
A fuel passage pipe main body to which pressurized fuel is supplied from a high-pressure fuel pump, a single injection valve socket fixed to each of the fuel passage pipe main body at a plurality of positions in the axial direction, and the same respective portions And a socket hole for holding a fuel injection valve controlled to be opened and closed by a control unit in communication with the fuel passage pipe body. A high-pressure fuel delivery pipe for a direct injection engine in which a mounting hole for mounting to the engine is formed in the mounting boss,
The fuel passage tube main body is an elongated cylindrical shape, and its axial direction is disposed horizontally, and the cylindrical side surface is pushed toward the axis at a location where the injection valve socket and the mounting boss are fixed. grain is recessed wall portion of the vertical plane shape is formed,
In each part of the fuel passage pipe main body to which the injection valve socket and the mounting boss are fixed,
The injection valve socket is fixed to the concave wall portion of the fuel passage pipe body with the axial direction of the socket hole directed vertically in the direction perpendicular to the axial direction of the fuel passage pipe body,
The mounting boss is secured in the axial direction of the mounting hole in the recessed wall portion of the fuel passage pipe body Nde said injector sockets and parallel toward the axial direction and perpendicular to the vertical direction of the fuel passage pipe body ,
The outer peripheral surface of the mounting boss opposite to the side fixed to the fuel passage pipe main body, the outer peripheral surface of the injection valve socket opposite to the side fixed to the fuel passage pipe main body, and the fuel passage the Rukoto gripping member affixed straddling said recessed wall portion of the tube body, the injector socket by the gripping members put on the recessed wall portion of the fuel passage pipe main body from the outer circumferential surface of the mounting boss A high-pressure fuel delivery pipe for a direct injection engine characterized by
請求項1に記載の直噴エンジン用高圧燃料デリバリパイプにおいて、
前記把持部材は、前記取付ボスから見て前記噴射弁ソケットと反対側にも延長して前記燃料通路管本体の外周面に固着されている
ことを特徴とする直噴エンジン用高圧燃料デリバリパイプ。
The high pressure fuel delivery pipe for a direct injection engine according to claim 1,
The high-pressure fuel delivery pipe for a direct injection engine, wherein the gripping member extends to the opposite side of the injection valve socket as viewed from the mounting boss and is fixed to the outer peripheral surface of the fuel passage pipe main body.
請求項1または2に記載の直噴エンジン用高圧燃料デリバリパイプにおいて、
前記把持部材は、前記噴射弁ソケットに固着された箇所を含む部分から上方に延び前記噴射弁ソケットの上端を跨いで屈曲させた屈曲片部を有し、前記屈曲片部が前記燃料通路管本体の上面の外周面に固着されている
ことを特徴とする直噴エンジン用高圧燃料デリバリパイプ。
The high-pressure fuel delivery pipe for a direct injection engine according to claim 1 or 2,
The gripping member has a bent piece portion that extends upward from a portion including a portion fixed to the injection valve socket and is bent across the upper end of the injection valve socket, and the bent piece portion is the fuel passage pipe main body. A high-pressure fuel delivery pipe for a direct-injection engine, characterized in that the high-pressure fuel delivery pipe is fixed to the outer peripheral surface of the upper surface of the engine.
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