JP3820619B2 - Fuel distribution pipe - Google Patents

Fuel distribution pipe Download PDF

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Publication number
JP3820619B2
JP3820619B2 JP07615796A JP7615796A JP3820619B2 JP 3820619 B2 JP3820619 B2 JP 3820619B2 JP 07615796 A JP07615796 A JP 07615796A JP 7615796 A JP7615796 A JP 7615796A JP 3820619 B2 JP3820619 B2 JP 3820619B2
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Prior art keywords
fuel
terminal
injector
power receiving
distribution pipe
Prior art date
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JPH09264226A (en
Inventor
正毅 芥川
沢田　　行雄
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Denso Corp
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Denso Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、各気筒のインジェクタに燃料を分配する燃料分配管に関するものである。
【０００２】
【従来の技術】
従来より、各気筒のインジェクタに燃料を分配する燃料分配管として、燃料分配管の外部から各インジェクタ毎に給電線を配線し、インジェクタに設けた受電コネクタに給電線の給電コネクタを接続するものが知られている。このような燃料分配管は、インジェクタおよび給電線の接続部にそれぞれ受電コネクタおよび給電コネクタが必要となるので製造工数が多く、製造コストが高くなるという問題がある。また、各インジェクタ毎に給電線を配線する必要があるので配線作業が煩雑になるという問題がある。
【０００３】
このような燃料分配管の問題を解決するため、特公平３−３９１９４号公報に開示されているものでは、燃料噴射信号を入力する入力コネクタとインジェクタの受電コネクタに接続する給電コネクタとを燃料分配管に設け、入力コネクタと給電コネクタとを接続するリード線を燃料分配管の本体内にインサート成形している。したがって、リード線を配線する必要がなく燃料分配管の燃料供給口にインジェクタの燃料入口を接続する際に給電コネクタとインジェクタの受電コネクタが接続するので燃料分配管へのインジェクタの組付けが容易になる。また、１ケ所の入力コネクタのみに外部から燃料噴射信号入力用コネクタを接続するだけでよいので、配線作業も容易である。
【０００４】
【発明が解決しようとする課題】
しかしながら、特公平３−３９１９４号公報に開示されているような、入力コネクタ、給電コネクタ、リード線等を燃料分配管の本体にインサート成形するものでは、さらに燃料分配管製造工数が増加するとともに製造コストが上昇するという問題がある。また、配線作業を簡素化するとともにしかも製造工数を削減するという両方の課題を解決する燃料分配管は現在のところ提案されていない。
本発明はこのような問題点に鑑みなされたもので、インジェクタと給電線との接続構造を簡素化した低コストの燃料分配管を提供することを目的とする。
【０００５】
本発明の他の目的は、さらに配線作業を簡素化した燃料分配管を提供することにある。
【０００６】
【課題を解決するための手段】
本発明の請求項１記載の燃料分配管によると、燃料導入部に設けた端子接続部において、燃料導入部の外部を通って端子接続部に配線された給電線の給電端子とインジェクタの受電端子とが電気的に接続することによりインジェクタと給電線との接続構造が簡素化されインジェクタおよび給電線のコネクタ部が不要となるので、製造工数が低下するとともに製造コストが低下する。
また、凸部と凹部との係合により端子接続部に受電端子が位置決めされるので、インジェクタと給電線とを容易に電気接続できる。
【０００７】
本発明の請求項２記載の燃料分配管によると、給電端子と受電端子とが直接電気的に接続することにより、端子接続部に受電端子と給電端子との接続を介在する電気導通部材が不要になるので端子接続部の製造工数および製造コストが低減する。
本発明の請求項４記載の燃料分配管によると、インジェクタの受電端子と給電線の給電端子との接続が容易になるとともに、端子接続部の製造も容易である。
【０００８】
本発明の請求項５記載の燃料分配管によると、燃料分配管とインジェクタへの給電部とが一体に成形されているので、燃料分配管と別体に給電端子および受電端子のコネクタを製造する必要がなく製造工数が低下するとともに製造コストが低下する。
【０００９】
本発明の請求項６記載の燃料分配管によると、信号供給源と各給電線とが一つの入力コネクタにより接続できるので配線作業が簡素化できる。
【００１０】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて説明する。
（第１実施例）
本発明の第１実施例を図１、図２および図３に示す。
図１に示すように、燃料分配管１０は、燃料導入部としての筒部１１、燃料供給口１４、端子接続部としてのガイド部１５および位置決めガイドとしての開口部１６からなり、絶縁性および断熱性に優れた合成樹脂あるいは合成樹脂系の材料で一体成形されている。合成樹脂材としては、ナイロン、ポリフェニレンサルファイド等が用いられる。また、複合材料として、前記合成樹脂にガラス繊維や板状のシリカ等の無機充填材を強化材として混合したものを用いてもよい。
【００１１】
図２に示すように、筒部１１は一方を閉塞した円筒状に成形されており、筒部１１に設けられたブラケット部１２により燃料分配管１０はボルト等でエンジンに固定されている。筒部１１の他方の端部には供給管接続部１３が設けられており、この供給管接続部１３と図示しない燃料ポンプとは燃料供給管により接続されている。燃料ポンプから供給される燃料は、燃料供給管、供給管接続部１３を経て筒部１１内の図１に示す供給通路４１に導入される。また、筒部１１内の燃料脈動を抑制するため、図２に示す公知のダンパ６０が筒部１１に取付けられている。
【００１２】
入力用コネクタ３０は、図示しないエンジン制御装置（以下、「エンジン制御装置」をＥＣＵという）からの一本の信号用ケーブルと給電線としてのワイヤハーネス３１とを接続し、入力用コネクタ３０からワイヤハーネス３１を経て図１に示すインジェクタ２０に燃料噴射信号が送出される。
エンジンの各気筒の吸気マニホールドに燃料を噴射するインジェクタ２０は、開口部１６および燃料供給口１４に挿入されており、供給通路４１から各燃料供給口１４内に形成された分配通路４２に分配された燃料が各インジェクタ２０に供給される。燃料供給口１４の内壁とインジェクタ２０の燃料入口２２の外壁とはＯリング５１でシールされている。
【００１３】
筒部１１の各燃料供給口１４近傍には、燃料供給口１４と一部を共有したガイド部１５が一体成形されている。ガイド部１５には貫通孔１５ａが形成されており、ワイヤハーネス３１およびインジェクタ２０を燃料分配管１０に組付ける前の状態では、貫通孔１５ａは中空である。ガイド部１５は、給電端子３２および受電端子２１が貫通孔１５ａにそれぞれ逆方向から挿入される際に給電端子３２および受電端子２１を案内する位置に設けられている。後述する矩形部１６ｂと矩形部２０ｂとの係合により貫通孔１５ａと受電端子２１との相対位置が決まり、また受電端子２１に対応する位置にガイド部１５が設けられているので、インジェクタ２０を開口部１６に合わせて挿入するだけで電気接続をスムーズに行うことが可能になる
ワイヤハーネス３１の電線３１ａの先端およびシール部材５２は給電端子３２によりかしめ固定されている。シール部材５２は円筒状に形成されており、貫通孔１５ａにワイヤハーネス３１を挿入する前の状態で、シール部材５２の外径は貫通孔１５ａの径よりも僅かに大きくなるように設定されている。また、シール部材５３は円板状に形成されており、受電端子２１に挿入されている。
【００１４】
燃料分配管１０にインジェクタ２０およびワイヤハーネス３１を組付けた図１に示す状態では、インジェクタ２０の受電端子２１とワイヤハーネス３１の給電端子３２とがガイド部１５の貫通孔１５ａで電気的に接続している。シール部材５２は弾性力をもってガイド部１５とワイヤハーネス３１との間で圧縮されており、図１に示す貫通孔１５ａの上方から塵や水が端子の電気接続部に進入することを防止している。シール部材５３はガイド部１５の下方端面とインジェクタ２０との間に挟持され弾性力をもって圧縮されているので、開口部１６とインジェクタ２０との間に形成される隙間から端子の電気接続部に塵や水が進入することを防止している。
【００１５】
前述したように燃料分配管１０は絶縁性に優れた合成樹脂等で形成されているため、給電端子３２、受電端子２１、および給電端子３２と受電端子２１との電気接続部に特に絶縁処理を施す必要はない。
図３に示すように、燃料分配管１０の開口部１６とインジェクタ２０とは僅かな隙間で嵌合している。開口部１６と嵌合する部分のインジェクタ２０の断面形状は円形部２０ａおよび凸部としての矩形部２０ｂからなり、開口部１６の断面形状も円形部１６ａおよび凸部としての矩形部１６ｂからなる。したがって、燃料分配管１０にインジェクタ２０を組付けた状態では、図３に示すようにインジェクタ２０の矩形部２０ｂと開口部１６の矩形部１６ｂとが噛み合うことによりインジェクタ２０の回転および軸からのずれが規制されている。これにより、インジェクタ２０から各気筒の吸気マニホールドに噴射される燃料噴射方向が一定するので、エンジンの吸気バルブに向け所望の位置に燃料を噴射することができる。
【００１６】
（第２実施例）
本発明の第２実施例を図４に示す。
第２実施例では、第１実施例の円板状のシール部材５３に代え、円筒状のシール部材５４を用いている。シール部材５４は、インジェクタ７０に設けた円筒状の凸部７１に嵌め込まれ、燃料分配管１０にインジェクタ７０を組付けた状態で、端子接続部としてのガイド部７２の内周壁とインジェクタ７０の外周壁との間で弾性力をもって圧縮されるので、塵や水が端子の電気接続部に進入することを防止する。
【００１７】
以上説明した本発明の上記実施例では、給電線の給電端子およびインジェクタの受電端子が案内され貫通孔で電気的に接続するガイド部を筒部と一体に成形したことにより、給電端子と受電端子との接続用のコネクタを燃料分配管と別体に製造する必要がないので、製造工数が低下するとともに製造コストが低下する。さらに、一体成形された以外の部品、例えば入力用コネクタ３０、ワイヤハーネス３１、給電端子３２、シール部材５２等は標準部品を使用可能であるため、新規に部品を製造する必要がないので製造コストをさらに低下することができる。
【００１８】
また本実施例では、断熱性に優れた合成樹脂あるいは断熱性に優れた合成樹脂の複合材料で燃料分配管を一体成形したことにより、燃料分配管をエンジンの近くに配設しても燃料分配管内の燃料への熱伝導を抑制できるので、燃料分配管内の燃料が気化することを防止できる。したがって、インジェクタに供給する燃料圧力の低下を防止しインジェクタへの燃料供給量を所定量に保持できる。
【００１９】
また本実施例では、複数の燃料供給口を有する燃料分配管を一体成形し、燃料供給口にインジェクタを組付けた状態で吸気マニホールドに組付けることができるので、吸気マニホールドへのインジェクタの組付けが容易になる。
さらにまた、給電線と接続した給電端子を予めガイド部にインサート成形しておき、燃料供給口にインジェクタを組付け、インジェクタの受電端子とガイド部の給電端子とを接続することも可能である。
【００２０】
さらにまた、開口部および開口部と噛み合うインジェクタの形状は、燃料供給口にインジェクタを組付けた後のインジェクタの回転を規制するのであれば、どのような形状を採用することも可能である。
【図面の簡単な説明】
【図１】本発明の第１実施例による燃料分配管を示す図２のＩ−Ｉ線断面図である。
【図２】本発明の第１実施例による燃料分配管を示す平面図である。
【図３】図１のIII −III 線断面図である。
【図４】本発明の第２実施例による燃料分配管を示す断面図である。
【符号の説明】
１０ 燃料分配管
１１ 筒部（燃料導入部）
１２ ブラケット部
１５ ガイド部（端子接続部）
１６ 開口部（位置決めガイド）
２０ インジェクタ
２１ 受電端子
３０ 入力用コネクタ
３１ ワイヤハーネス（給電線）
３２ 給電端子
４１ 共通通路
４２ 分配通路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel distribution pipe that distributes fuel to an injector of each cylinder.
[0002]
[Prior art]
Conventionally, as a fuel distribution pipe for distributing fuel to the injectors of each cylinder, a power supply line is wired for each injector from the outside of the fuel distribution pipe, and a power supply connector of the power supply line is connected to a power reception connector provided in the injector. Are known. Such a fuel distribution pipe has a problem that the number of manufacturing steps is large and the manufacturing cost is high because a power receiving connector and a power feeding connector are required at the connection portion between the injector and the power feeding line, respectively. In addition, since it is necessary to wire the feeder for each injector, there is a problem that the wiring work becomes complicated.
[0003]
In order to solve such a problem of the fuel distribution pipe, in Japanese Patent Publication No. 3-39194, an input connector for inputting a fuel injection signal and a power supply connector for connecting to a power receiving connector of the injector are separated. A lead wire that is provided in the pipe and connects the input connector and the power supply connector is insert-molded in the main body of the fuel distribution pipe. Therefore, it is not necessary to wire the lead wire, and when connecting the fuel inlet of the injector to the fuel supply port of the fuel distribution pipe, the power feeding connector and the power receiving connector of the injector are connected, so the assembly of the injector to the fuel distribution pipe is easy. Become. Further, since it is only necessary to connect the fuel injection signal input connector from the outside to only one input connector, wiring work is also easy.
[0004]
[Problems to be solved by the invention]
However, as disclosed in Japanese Examined Patent Publication No. 3-39194, an input connector, a power supply connector, a lead wire, and the like that are insert-molded into the main body of the fuel distribution pipe are manufactured as the fuel distribution pipe manufacturing man-hour further increases. There is a problem that costs increase. Further, a fuel distribution pipe that solves both the problems of simplifying the wiring work and reducing the number of manufacturing steps has not been proposed at present.
The present invention has been made in view of such problems, and an object of the present invention is to provide a low-cost fuel distribution pipe with a simplified connection structure between an injector and a feeder line.
[0005]
Another object of the present invention is to provide a fuel distribution pipe that further simplifies wiring work.
[0006]
[Means for Solving the Problems]
According to the fuel distribution pipe of the first aspect of the present invention, in the terminal connection portion provided in the fuel introduction portion, the power supply terminal of the power supply line wired to the terminal connection portion through the outside of the fuel introduction portion and the power reception terminal of the injector Are electrically connected to each other, thereby simplifying the connection structure between the injector and the power supply line and eliminating the need for a connector portion of the injector and the power supply line. This reduces the number of manufacturing steps and the manufacturing cost.
In addition, since the power receiving terminal is positioned at the terminal connecting portion by the engagement between the convex portion and the concave portion, the injector and the feeder line can be easily electrically connected.
[0007]
According to the fuel distribution pipe of the second aspect of the present invention, since the power feeding terminal and the power receiving terminal are directly electrically connected, an electrical conduction member for interposing the connection between the power receiving terminal and the power feeding terminal is unnecessary in the terminal connection portion. As a result, the number of manufacturing steps and the manufacturing cost of the terminal connection portion are reduced.
According to the fuel distribution pipe of the fourth aspect of the present invention, it is easy to connect the power receiving terminal of the injector and the power feeding terminal of the power feeding line, and it is easy to manufacture the terminal connecting portion.
[0008]
According to the fuel distribution pipe of the fifth aspect of the present invention, since the fuel distribution pipe and the power feeding portion to the injector are integrally formed, a connector for the power feeding terminal and the power receiving terminal is manufactured separately from the fuel distribution pipe. This is not necessary, and the number of manufacturing steps is reduced and the manufacturing cost is reduced .
[0009]
According to the fuel distribution pipe of the sixth aspect of the present invention, since the signal supply source and each power supply line can be connected by one input connector, the wiring work can be simplified.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
A first embodiment of the present invention is shown in FIGS.
As shown in FIG. 1, the fuel distribution pipe 10 includes a cylindrical portion 11 as a fuel introduction portion, a fuel supply port 14, a guide portion 15 as a terminal connection portion, and an opening portion 16 as a positioning guide. It is integrally molded with a synthetic resin or a synthetic resin-based material having excellent properties. As the synthetic resin material, nylon, polyphenylene sulfide, or the like is used. Moreover, you may use what mixed inorganic fillers, such as glass fiber and plate-like silica, as a reinforcing material to the said synthetic resin as a composite material.
[0011]
As shown in FIG. 2, the cylinder portion 11 is formed in a cylindrical shape with one end closed, and the fuel distribution pipe 10 is fixed to the engine with a bolt or the like by a bracket portion 12 provided on the cylinder portion 11. A supply pipe connecting portion 13 is provided at the other end of the cylindrical portion 11, and the supply pipe connecting portion 13 and a fuel pump (not shown) are connected by a fuel supply pipe. The fuel supplied from the fuel pump is introduced into the supply passage 41 shown in FIG. 1 in the cylindrical portion 11 through the fuel supply pipe and the supply pipe connecting portion 13. Further, a known damper 60 shown in FIG. 2 is attached to the cylindrical portion 11 in order to suppress fuel pulsation in the cylindrical portion 11.
[0012]
The input connector 30 connects a signal cable from an unillustrated engine control device (hereinafter, “engine control device” is referred to as an ECU) and a wire harness 31 as a power supply line. A fuel injection signal is sent to the injector 20 shown in FIG.
The injector 20 for injecting fuel into the intake manifold of each cylinder of the engine is inserted into the opening 16 and the fuel supply port 14 and is distributed from the supply passage 41 to a distribution passage 42 formed in each fuel supply port 14. Fuel is supplied to each injector 20. The inner wall of the fuel supply port 14 and the outer wall of the fuel inlet 22 of the injector 20 are sealed with an O-ring 51.
[0013]
In the vicinity of each fuel supply port 14 of the cylinder portion 11, a guide portion 15 sharing a part with the fuel supply port 14 is integrally formed. A through hole 15 a is formed in the guide portion 15, and the through hole 15 a is hollow before the wire harness 31 and the injector 20 are assembled to the fuel distribution pipe 10. The guide portion 15 is provided at a position for guiding the power feeding terminal 32 and the power receiving terminal 21 when the power feeding terminal 32 and the power receiving terminal 21 are respectively inserted into the through holes 15a from opposite directions. The relative position between the through-hole 15a and the power receiving terminal 21 is determined by the engagement of a rectangular portion 16b and a rectangular portion 20b described later, and the guide portion 15 is provided at a position corresponding to the power receiving terminal 21. The tip of the electric wire 31a of the wire harness 31 and the seal member 52 that can be smoothly connected to each other only by being inserted in accordance with the opening 16 are caulked and fixed by the power supply terminal 32. The seal member 52 is formed in a cylindrical shape, and the outer diameter of the seal member 52 is set to be slightly larger than the diameter of the through hole 15a before the wire harness 31 is inserted into the through hole 15a. Yes. Further, the seal member 53 is formed in a disk shape and is inserted into the power receiving terminal 21.
[0014]
In the state shown in FIG. 1 in which the injector 20 and the wire harness 31 are assembled to the fuel distribution pipe 10, the power receiving terminal 21 of the injector 20 and the power supply terminal 32 of the wire harness 31 are electrically connected through the through hole 15 a of the guide portion 15. is doing. The seal member 52 is compressed between the guide portion 15 and the wire harness 31 with elasticity, and prevents dust and water from entering the electrical connection portion of the terminal from above the through hole 15a shown in FIG. Yes. Since the seal member 53 is sandwiched between the lower end surface of the guide portion 15 and the injector 20 and is compressed with an elastic force, dust is generated from the gap formed between the opening portion 16 and the injector 20 to the electrical connection portion of the terminal. And water is prevented from entering.
[0015]
As described above, since the fuel distribution pipe 10 is formed of synthetic resin or the like having excellent insulating properties, the power supply terminal 32, the power reception terminal 21, and the electrical connection portion between the power supply terminal 32 and the power reception terminal 21 are particularly insulated. There is no need to apply.
As shown in FIG. 3, the opening 16 of the fuel distribution pipe 10 and the injector 20 are fitted in a slight gap. The cross-sectional shape of the injector 20 at the portion that fits into the opening 16 is composed of a circular portion 20a and a rectangular portion 20b as a convex portion, and the cross-sectional shape of the opening 16 is also composed of a circular portion 16a and a rectangular portion 16b as a convex portion. Therefore, in a state where the injector 20 is assembled to the fuel distribution pipe 10, the rotation of the injector 20 and the deviation from the shaft are caused by the engagement of the rectangular portion 20b of the injector 20 and the rectangular portion 16b of the opening 16 as shown in FIG. Is regulated. Thereby, since the fuel injection direction injected from the injector 20 into the intake manifold of each cylinder is constant, fuel can be injected to a desired position toward the intake valve of the engine.
[0016]
(Second embodiment)
A second embodiment of the present invention is shown in FIG.
In the second embodiment, a cylindrical seal member 54 is used instead of the disc-shaped seal member 53 of the first embodiment. The seal member 54 is fitted into a cylindrical convex portion 71 provided on the injector 70, and the inner peripheral wall of the guide portion 72 as a terminal connecting portion and the outer periphery of the injector 70 in a state where the injector 70 is assembled to the fuel distribution pipe 10. Since it is compressed with elasticity between the walls, dust and water are prevented from entering the terminal electrical connection.
[0017]
In the above-described embodiment of the present invention described above, the power feeding terminal and the power receiving terminal are formed by integrally forming the guide portion that guides the power feeding terminal of the power feeding line and the power receiving terminal of the injector and is electrically connected through the through hole. Since it is not necessary to manufacture the connector for connecting to the fuel distribution pipe separately from the fuel distribution pipe, the manufacturing man-hour is reduced and the manufacturing cost is also reduced. Furthermore, since parts other than those integrally molded, for example, the input connector 30, the wire harness 31, the power supply terminal 32, the seal member 52, etc., can be used as standard parts, it is not necessary to newly manufacture parts, so that the manufacturing cost Can be further reduced.
[0018]
Further, in this embodiment, the fuel distribution pipe is integrally formed of a synthetic resin having excellent heat insulation or a composite material of synthetic resin having excellent heat insulation, so that even if the fuel distribution pipe is arranged close to the engine, fuel distribution is possible. Since heat conduction to the fuel in the pipe can be suppressed, vaporization of the fuel in the fuel distribution pipe can be prevented. Accordingly, it is possible to prevent a decrease in fuel pressure supplied to the injector and to keep the fuel supply amount to the injector at a predetermined amount.
[0019]
Further, in this embodiment, a fuel distribution pipe having a plurality of fuel supply ports can be integrally formed and assembled to the intake manifold in a state where the injector is assembled to the fuel supply port, so that the injector is assembled to the intake manifold. Becomes easier.
Furthermore, it is also possible to insert the power feeding terminal connected to the power feeding line into the guide portion in advance, assemble the injector at the fuel supply port, and connect the power receiving terminal of the injector and the power feeding terminal of the guide portion.
[0020]
Furthermore, the opening and the shape of the injector meshing with the opening can be any shape as long as the rotation of the injector after the injector is assembled to the fuel supply port is restricted.
[Brief description of the drawings]
1 is a cross-sectional view taken along line II of FIG. 2 showing a fuel distribution pipe according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a fuel distribution pipe according to a first embodiment of the present invention.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a sectional view showing a fuel distribution pipe according to a second embodiment of the present invention.
[Explanation of symbols]
10 Fuel distribution pipe 11 Tube part (fuel introduction part)
12 Bracket part 15 Guide part (terminal connection part)
16 Opening (positioning guide)
20 Injector 21 Power receiving terminal 30 Input connector 31 Wire harness (feed line)
32 Feeding terminal 41 Common passage 42 Distribution passage

Claims (6)

燃料導入部、およびこの燃料導入部内に導入された燃料を分配する複数の燃料供給口を有し、前記複数の燃料供給口にそれぞれ接続する電磁制御式のインジェクタに前記燃料供給口から燃料を供給する燃料分配管において、
前記インジェクタは、その燃料入口が軸方向一端に設けられ、その燃料入口が前記燃料供給口に接続されており、
前記燃料供給口毎に前記燃料導入部に一体に設けられる端子接続部であって、前記燃料導入部の外部を通って前記端子接続部に配線される給電線の給電端子を案内するとともに、前記燃料供給口に前記インジェクタを接続する際に前記インジェクタとともに同一方向に移動する前記インジェクタの受電端子を案内し、前記給電端子と前記受電端子とが電気的に接続する端子接続部と、
前記受電端子に挿入されるシール部材と、
を備え、
前記インジェクタには径方向に突出する凸部が形成され、前記受電端子は前記凸部の前記燃料入口側の端面から前記移動方向に伸び、前記燃料導入部には前記凸部の側壁をその径方向外側の端面を囲い、前記凸部に係合する凹部が形成され、前記凸部と前記凹部が係合した状態で前記端子接続部は前記受電端子に対応する位置に形成されており、前記凸部と前記凹部が噛み合った状態で前記インジェクタの回転および軸からのずれが規制され、前記受電端子に挿入された前記シール部材は前記凸部と前記凹部の端面との間に挟持されることを特徴とする燃料分配管。A fuel introduction unit and a plurality of fuel supply ports for distributing fuel introduced into the fuel introduction unit, and supplying fuel from the fuel supply port to an electromagnetically controlled injector connected to each of the plurality of fuel supply ports In the fuel distribution pipe
The fuel inlet of the injector is provided at one end in the axial direction, and the fuel inlet is connected to the fuel supply port.
A terminal connection portion provided integrally with the fuel introduction portion for each fuel supply port, and guides a power supply terminal of a power supply line wired to the terminal connection portion through the outside of the fuel introduction portion, and A terminal connection portion for guiding a power receiving terminal of the injector that moves in the same direction as the injector when the injector is connected to a fuel supply port, and the power feeding terminal and the power receiving terminal are electrically connected;
A seal member inserted into the power receiving terminal;
With
The injector is formed with a projecting portion protruding in the radial direction, the power receiving terminal extends from the end surface of the projecting portion on the fuel inlet side in the moving direction, and the fuel introduction portion has a side wall of the projecting portion as its diameter. A concave portion that encloses the outer end surface in the direction and engages with the convex portion, and the terminal connection portion is formed at a position corresponding to the power receiving terminal in a state where the convex portion and the concave portion are engaged, Rotation of the injector and deviation from the shaft are restricted in a state where the convex portion and the concave portion are engaged, and the seal member inserted into the power receiving terminal is sandwiched between the convex portion and the end surface of the concave portion. Fuel distribution pipe characterized by 前記給電端子と前記受電端子とは前記端子接続部内で直接電気的に接続することを特徴とする請求項１記載の燃料分配管。  2. The fuel distribution pipe according to claim 1, wherein the power supply terminal and the power receiving terminal are directly electrically connected within the terminal connection portion. 前記燃料供給口への前記インジェクタの接続方向は、前記給電端子が前記端子接続部に案内される方向と逆方向であることを特徴とする請求項１または２記載の燃料分配管。  3. The fuel distribution pipe according to claim 1, wherein a connection direction of the injector to the fuel supply port is opposite to a direction in which the power supply terminal is guided by the terminal connection portion. 前記端子接続部は、前記給電端子および前記受電端子がそれぞれ逆方向から挿入される貫通孔を有することを特徴とする請求項１、２または３記載の燃料分配管。  4. The fuel distribution pipe according to claim 1, wherein the terminal connection portion has a through hole into which the power feeding terminal and the power receiving terminal are inserted from opposite directions. 5. 燃料導入部、およびこの燃料導入部内に導入された燃料を分配する複数の燃料供給口を有し、前記複数の燃料供給口にそれぞれ接続する電磁制御式のインジェクタに前記燃料供給口から燃料を供給する燃料分配管において、
前記インジェクタは、その燃料入口が軸方向一端に設けられ、その燃料入口が前記燃料供給口に接続されており、
前記インジェクタの受電端子と電気的に接続する給電端子を有し、前記燃料供給口毎に前記燃料導入部に一体に設けられる端子接続部と、
前記燃料導入部の外部を通って前記端子接続部に配線され前記給電端子と電気的に接続されている給電線と、
前記受電端子に挿入されるシール部材と、
を備え、
前記インジェクタには径方向に突出する凸部が形成され、前記受電端子は前記凸部の前記燃料入口側の端面から前記移動方向に伸び、前記燃料導入部には前記凸部の側壁をその径方向外側の端面を囲い、前記凸部に係合する凹部が形成され、前記凸部と前記凹部が係合した状態で前記端子接続部は前記受電端子に対応する位置に形成されており、前記凸部と前記凹部が噛み合った状態で前記インジェクタの回転および軸からのずれが規制され、前記受電端子に挿入された前記シール部材は前記凸部と前記凹部の端面との間に挟持されることを特徴とする燃料分配管。A fuel introduction unit and a plurality of fuel supply ports for distributing fuel introduced into the fuel introduction unit, and supplying fuel from the fuel supply port to an electromagnetically controlled injector connected to each of the plurality of fuel supply ports In the fuel distribution pipe
The fuel inlet of the injector is provided at one end in the axial direction, and the fuel inlet is connected to the fuel supply port.
A power supply terminal electrically connected to a power receiving terminal of the injector, and a terminal connection portion provided integrally with the fuel introduction portion for each fuel supply port;
A feed line that is wired to the terminal connection portion through the outside of the fuel introduction portion and is electrically connected to the feed terminal;
A seal member inserted into the power receiving terminal;
With
The injector is formed with a projecting portion protruding in the radial direction, the power receiving terminal extends from the end surface of the projecting portion on the fuel inlet side in the moving direction, and the fuel introduction portion has a side wall of the projecting portion as its diameter. A concave portion that encloses the outer end surface in the direction and engages with the convex portion, and the terminal connection portion is formed at a position corresponding to the power receiving terminal in a state where the convex portion and the concave portion are engaged, Rotation of the injector and deviation from the shaft are restricted in a state where the convex portion and the concave portion are engaged, and the seal member inserted into the power receiving terminal is sandwiched between the convex portion and the end surface of the concave portion. Fuel distribution pipe characterized by 前記給電線の反給電端子側は一つの入力コネクタに接続されていることを特徴とする請求項１〜５のいずれか一項記載の燃料分配管。  The fuel distribution pipe according to any one of claims 1 to 5, wherein a non-feed terminal side of the feed line is connected to one input connector.
JP07615796A 1996-03-29 1996-03-29 Fuel distribution pipe Expired - Fee Related JP3820619B2 (en)

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JP3820619B2 true JP3820619B2 (en) 2006-09-13

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US6502552B2 (en) 2000-10-25 2003-01-07 Siemens Vdo Automotne Inc. Wiring connection for fuel injectors
JP5083185B2 (en) * 2008-11-28 2012-11-28 株式会社デンソー Injector
JP5452463B2 (en) * 2010-12-24 2014-03-26 株式会社ミツバ Fuel supply device

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