JPS6116262A - Mounting construction of injection valve in multi-cylinder fuel-injection engine - Google Patents

Mounting construction of injection valve in multi-cylinder fuel-injection engine

Info

Publication number
JPS6116262A
JPS6116262A JP59138579A JP13857984A JPS6116262A JP S6116262 A JPS6116262 A JP S6116262A JP 59138579 A JP59138579 A JP 59138579A JP 13857984 A JP13857984 A JP 13857984A JP S6116262 A JPS6116262 A JP S6116262A
Authority
JP
Japan
Prior art keywords
stay
branch
mounting
intake manifold
injection valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP59138579A
Other languages
Japanese (ja)
Inventor
Yoshihisa Kaneda
金田　慶久
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP59138579A priority Critical patent/JPS6116262A/en
Publication of JPS6116262A publication Critical patent/JPS6116262A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit

Landscapes

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

Abstract

PURPOSE:To enable the mounting part of a stay to be easily worked without causing the necessity for separately forming a branch part, by providing the stay between the neighboring branch parts of an intake manifold and setting an extension of the center axial line in a mounting bolt hole of the stay to be placed in a specific direction. CONSTITUTION:A engine 1 fixes to its side wall a flange 4 in the downstream end of a branch part 3 in an intake manifold 2 further connects the branch part 3, curing upward its upstream side, with the bottom wall of a surge tank 5. While the engine inserts a nozzle part 6a in the end of a fuel injection valve 6 into a mounting hole part 3a, formed in the vicinity of the downstream end in each branch part 3, further inserts the upper end part of said valve 6 into a fuel supply port 8a in a delivery pipe 8. Here the engine provides between the neighboring branch parts 3 a stay 7, and its mounting bolt hole 7b is formed in such a manner that an extension of its center axial line (a) is provided between the neighboring branch parts 3 further positioned through a part between the surge tank 5 and the flange 4.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、燃料噴射式多気筒エンジンの噴射弁取付構
造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an injection valve mounting structure for a fuel injection multi-cylinder engine.

〔従来技術〕[Prior art]

最近、車両用エンジンにおいては、燃料供給装置として
従来の気化器に代えて燃料噴射弁を採用する傾向にあり
、この燃料噴射弁の取付構造としては従来から種々なも
のが知られている。例えば、燃料噴射式多気筒エンジン
では、吸気マニホールドのブランチ部に設けた取付孔部
に燃料噴射弁の先端を挿入するとともに、燃料噴射弁の
上端をデリバリパイプの燃料供給口部に挿入し、一方ブ
ランチ部に設けたステーに取付ボルトによってデリバリ
パイプを締付固定し、該デリバリパイプによって燃料噴
射弁を吸気マニホールドのブランチ部に押圧固定するよ
うにしたものがある。Recently, there has been a trend in vehicle engines to employ fuel injection valves as fuel supply devices in place of conventional carburetors, and various mounting structures for this fuel injection valve have been known. For example, in a fuel injection multi-cylinder engine, the tip of the fuel injector is inserted into the mounting hole provided in the branch of the intake manifold, and the upper end of the fuel injector is inserted into the fuel supply port of the delivery pipe. There is one in which a delivery pipe is tightened and fixed to a stay provided in a branch part using a mounting bolt, and a fuel injection valve is pressed and fixed to a branch part of an intake manifold by the delivery pipe.

また車両用エンジンにおいては、エンジンの出力アンプ
の観点から、吸気慣性を利用して充填効率の向上を図ろ
うとする工夫が種々行なわれており、そのため最近の吸
気マニホールドのブランチ部はこれを長尺にする傾向に
ある。そしてこの場合、単にブランチ部をエンジンの幅
方向に延長すると、エンジンルームのスペースとの関係
で、レイアウト上の問題が生じることから、ブランチ部
上流側を上方、即ち燃料噴射弁側に湾曲させてサージタ
ンクに接続するようにしている。In addition, in vehicle engines, from the perspective of engine output amplifier, various efforts have been made to utilize intake inertia to improve charging efficiency. There is a tendency to In this case, simply extending the branch part in the width direction of the engine would cause layout problems due to the space in the engine room, so the upstream side of the branch part is curved upward, that is, toward the fuel injection valve side. I am trying to connect it to a surge tank.

しかるに上記噴射弁取付構造を有する燃料噴射式多気筒
エンジンにおいて、上述のように吸気マニホールドのブ
ランチ部上流側を上方に湾曲させるようにすると、加工
工具や組付工具がブランチ部の湾曲部分やサージタンク
と干渉してしまい、ステーのデリバリパイプ取付面や取
付ボルト孔の加工が困難になり、又デリバリパイプの組
付作業が煩雑になるという問題がある。However, in a fuel-injected multi-cylinder engine having the above-mentioned injection valve mounting structure, if the upstream side of the branch part of the intake manifold is curved upward as described above, processing tools and assembly tools can be used to avoid damage to the curved part of the branch part or surge. There is a problem in that it interferes with the tank, making it difficult to process the delivery pipe mounting surface of the stay and the mounting bolt holes, and making the delivery pipe assembly work complicated.

そこで従来の燃料噴射式多気筒エンジンでは、吸気マニ
ホールドのブランチ部上流側を上方に湾曲させる場合に
は、例えば特開昭５６−３４９５４号公報に示されるよ
うに、吸気マニホールドのブランチ部を分割し、ステー
のデリバリパイプ取付面及び取付ボルト孔を加工し、デ
リバリパイプを組付けた後、吸気マニホールドを組立て
るようにしていたが、この方法では、吸気マニホールド
のブランチ部分割面にガスケット（シール）を介在させ
る必要があり、又多数の取付ボルトが必要となることか
ら、部品点数が増加してコストアンプを招き、又組立工
程が増えるという問題が生した。Therefore, in conventional fuel injection multi-cylinder engines, when the upstream side of the branch part of the intake manifold is curved upward, the branch part of the intake manifold is divided, as shown in Japanese Patent Laid-Open No. 56-34954, for example. , the intake manifold was assembled after machining the delivery pipe mounting surface and mounting bolt holes of the stay and assembling the delivery pipe, but with this method, a gasket (seal) was attached to the split surface of the branch part of the intake manifold. Since a large number of mounting bolts are required, the number of parts increases, which increases costs and increases the number of assembly steps.

〔発明の目的〕[Purpose of the invention]

この発明は、かかる問題点に鑑み、吸気マニホールドの
ブランチ部を分割形成することな（、ステーのデリバリ
パイプ取付面及び取付ボルト孔を容易に加工できる燃料
噴射式多気筒エンジンの噴射弁取付構造を提供せんとす
るものである。In view of these problems, the present invention provides an injection valve mounting structure for a fuel injection multi-cylinder engine in which the delivery pipe mounting surface of the stay and the mounting bolt holes can be easily machined without dividing the branch part of the intake manifold. This is what we intend to provide.

〔発明の構成〕[Structure of the invention]

そこでこの発明は、燃料噴射式多気筒エンジンにおいて
、吸気マニホールドの隣接するブランチ部間にステーを
設けるとともに、該ステーの取付ボルト孔の中心軸線の
延長線を上記隣接するブランチ部間でかつサージタンク
とブランチ部下端のフランジとの間を抜けるように設定
したもので、これにより加工工具や組付工具が吸気マニ
ホールドのブランチ部の湾曲部分やサージタンクと干渉
するのを防止するようにしたものである。Therefore, the present invention provides a fuel-injected multi-cylinder engine with a stay between adjacent branch parts of the intake manifold, and an extension of the center axis of the mounting bolt hole of the stay between the adjacent branch parts and a surge tank. and the flange at the lower end of the branch, which prevents processing tools and assembly tools from interfering with the curved part of the branch part of the intake manifold or the surge tank. be.

〔実施例〕〔Example〕

以下、本発明の実施例を図について説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第１図及び第２図は本発明の一実施例による燃料噴射式
多気筒エンジンの噴射弁取付構造を示す。1 and 2 show an injection valve mounting structure for a fuel injection multi-cylinder engine according to an embodiment of the present invention.

図において、１はエンジンで、該エンジン１の側壁には
吸気マニホールド２のブランチ部３下流端のフランジ４
が固定され、上記ブランチ部３の上流側は上方に湾曲さ
れてサージタンク５の底壁に連通接続されている。なお
１０はスロットルチャンバである。In the figure, 1 is an engine, and a side wall of the engine 1 has a flange 4 at the downstream end of a branch part 3 of an intake manifold 2.
is fixed, and the upstream side of the branch portion 3 is curved upward and connected to the bottom wall of the surge tank 5. Note that 10 is a throttle chamber.

また上記吸気マニホールド２の各ブランチ部３にはその
下流端付近に取付孔部３ａが形成され、該取付孔部３ａ
には燃料噴射弁６の先端ノズル部６ａが挿入され、該燃
料噴射弁６の上端部はデリバリパイプ８の燃料供給口部
８ａ内に挿入されている。また上記吸気マニホールド２
の隣接するブランチ部３間には該ブランチ部３と一体に
ステー７が形成され、該ステー７にはデリバリパイプ取
付面７ａ及び取付ボルト孔７ｂが形成されている。Further, each branch portion 3 of the intake manifold 2 has a mounting hole 3a formed near its downstream end.
The tip nozzle portion 6a of the fuel injection valve 6 is inserted into the fuel injection valve 6, and the upper end portion of the fuel injection valve 6 is inserted into the fuel supply port portion 8a of the delivery pipe 8. In addition, the above intake manifold 2
A stay 7 is formed integrally with the branch portion 3 between adjacent branch portions 3, and the stay 7 is formed with a delivery pipe mounting surface 7a and a mounting bolt hole 7b.

この取（＝Ｔボルト孔７ｂの中心軸線ａは燃料噴射弁６
の中心軸線すの方向と同一方向に設定され、又上記中心
軸線ａの延長線は上記隣接するブランチ部３間でかつ上
記サージタンク５と上記ブランチ部３下流端のフランジ
４との間を抜けるように設定されている。The center axis a of the T-bolt hole 7b is the center axis of the fuel injection valve 6.
The extension line of the central axis a passes between the adjacent branch parts 3 and between the surge tank 5 and the flange 4 at the downstream end of the branch part 3. It is set as follows.

また上記ステー７の取付面７ａにはデリバリパイプ８の
取付部８ｂが重ねられ、上記ステー７の取付ボルト孔７
ｂには上記取付部８ｂの取ｆ＝ｊ孔を挿通した取付ボル
ト９が炊合され、こうしてデリバリパイプ８はステー７
に締付固定され、又燃料噴射弁６はデリバリパイプ８に
よって吸気マニホールド２のブランチ部３に押圧固定さ
れている。Further, the mounting surface 7a of the stay 7 is overlapped with the mounting portion 8b of the delivery pipe 8, and the mounting bolt hole 7 of the stay 7 is overlapped with the mounting surface 7a of the stay 7.
A mounting bolt 9 inserted through the mounting hole f=j of the mounting portion 8b is screwed into b, and the delivery pipe 8 is thus attached to the stay 7.
Further, the fuel injection valve 6 is pressed and fixed to the branch portion 3 of the intake manifold 2 by a delivery pipe 8.

次に作用効果について説明する。Next, the effects will be explained.

本構造においては、吸気マニホールド２の隣接するブラ
ンチ部３間にステー７を設けるととも、該ステー７の取
付ボルト孔７ｂをその中心軸線ａの延長線が上記隣接す
るブランチ部３間でかつサージタンク５とブランチ部３
下流端のフランジ４との間を抜けるように形成しており
、従ってステ−７のデリバリパイプ取付面７ａ及び取付
ボルト孔７ｂを加工する場合には、従来のように加工工
具がブランチ部３の湾曲部分やサージタンク４と干渉す
るということはなく、加工を容易に行なうことができる
。In this structure, the stay 7 is provided between the adjacent branch parts 3 of the intake manifold 2, and the mounting bolt hole 7b of the stay 7 has an extension line of the center axis a between the adjacent branch parts 3 and a surge Tank 5 and branch part 3
It is formed so as to pass through between the downstream end flange 4, and therefore, when machining the delivery pipe mounting surface 7a and the mounting bolt hole 7b of the stay 7, the machining tool must be inserted into the branch portion 3 as in the conventional method. There is no interference with the curved portion or the surge tank 4, and processing can be easily performed.

またデリバリパイプ８及び燃料噴射弁６を組付ける場合
には、吸気マニホールド２のブランチ部３の取付孔部３
ａに燃料噴射弁６の先端を挿入するとともに、その上端
をデリバリパイプ８の燃料供給口部８ａに挿入し、ステ
ー７の取付面７ａにデリバリパイプ８の取付部８ｂを重
ねて位置合せをし、取付ボルト９を該取付部８ｂの取付
孔に挿通させてステー７の取付ボルト孔７ｂに暢合さセ
ればよい。その際、取付ボルト９は上記隣接するブラン
チ部３間から締付工具１１を挿入してこれを燃料噴射弁
６の中心軸線すの方向に締付けることができ、又これに
より燃料噴射弁６を確実に押圧固定できる。In addition, when assembling the delivery pipe 8 and the fuel injection valve 6, the mounting hole 3 of the branch part 3 of the intake manifold 2
Insert the tip of the fuel injector 6 into the hole a, and insert its upper end into the fuel supply port 8a of the delivery pipe 8, and align the mounting portion 8b of the delivery pipe 8 so that it overlaps the mounting surface 7a of the stay 7. , the mounting bolt 9 may be inserted into the mounting hole of the mounting portion 8b and fitted into the mounting bolt hole 7b of the stay 7. At that time, the mounting bolt 9 can be tightened in the direction of the center axis of the fuel injection valve 6 by inserting a tightening tool 11 between the adjacent branch parts 3, and thereby the fuel injection valve 6 can be securely tightened. Can be fixed by pressing.

以上のような本実施例の構造では、ステーの加工及びデ
リバリパイプの組付に吸気マニホールドブランチ部の湾
曲部分やサージタンクが邪魔になるということがなく、
その結果ステーの加工及びデリバリパイプの組付を容易
に行なうことができる。With the structure of this embodiment as described above, the curved part of the intake manifold branch part and the surge tank do not get in the way of machining the stay and assembling the delivery pipe.
As a result, machining of the stay and assembly of the delivery pipe can be easily performed.

また本構造では、吸気マニホールドのブランチ部を分割
形成する必要がなく、その結果従来の問題、即ち部品点
数の増加やコストアンプの問題、及び組立工程増加の問
題を全て解消できる。Further, with this structure, there is no need to divide the branch portion of the intake manifold, and as a result, all of the conventional problems, namely, the problem of an increase in the number of parts, the problem of cost increase, and the problem of an increase in assembly steps can be solved.

なお本発明は上記実施例に限定されるものではなく、種
々の変形・変更が可能であり、例えば吸気マニホールド
のブランチ部の側面形状は略り字形状ではなく、略Ｃ字
形状であってもよい。It should be noted that the present invention is not limited to the above-mentioned embodiments, and various modifications and changes are possible. good.

〔発明の効果〕〔Effect of the invention〕

以上のように、本発明によれば、燃料噴射式多気筒エン
ジンにおいて、吸気マニホールドの隣接するブランチ部
間にステーを設けるとともに、該ステーの取付ボルト孔
の中心軸線の延長線を上記隣接するブランチ部間でかつ
サージタンクとブランチ部下端のフランジとの間を抜け
るように設定したので、吸気マニホールドを分割形成す
ることなく、ステーのデリバリパイプ取付面及び取付ボ
ルト孔を容易に加工でき、デリバリパイプの組付を容易
に行なうことができる効果がある。As described above, according to the present invention, in a fuel-injected multi-cylinder engine, a stay is provided between adjacent branch parts of an intake manifold, and an extension of the center axis of the mounting bolt hole of the stay is connected to the adjacent branches. Since it is set to pass between the sections and between the surge tank and the flange at the lower end of the branch, the delivery pipe mounting surface of the stay and the mounting bolt holes can be easily machined without having to separate the intake manifold. This has the effect of making assembly easier.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例による燃料噴射式多気筒エン
ジンの噴射弁取付構造の側面図、第２図は第１図の■−
■線断面図である。 ２・・・吸気マニホールド、３・・・ブランチ部、４・
・・フランジ、５・・・サージタンク、６・・・燃料噴
射弁、７・・・ステー、７ｂ・・・取付ボルト孔、８・
・・デリバリパイプ、９・・・取付ボルト。 特　許　出　願　人　マツダ株式会社 代理人　　　弁理士　早　瀬　憲　− 第１図 ２″４FIG. 1 is a side view of an injector mounting structure for a fuel-injected multi-cylinder engine according to an embodiment of the present invention, and FIG.
■It is a line sectional view. 2... Intake manifold, 3... Branch part, 4...
... Flange, 5... Surge tank, 6... Fuel injection valve, 7... Stay, 7b... Mounting bolt hole, 8...
...Delivery pipe, 9...Mounting bolt. Patent applicant: Mazda Motor Corporation agent, patent attorney Ken Hayase - Figure 1 2″4

Claims (1)

【特許請求の範囲】[Claims] （１）吸気マニホールドの複数の各ブランチ部に燃料噴
射弁を設ける一方、上記ブランチ部上流側を燃料噴射弁
側に湾曲させてサージタンクに接続してなる燃料噴射式
多気筒エンジンにおいて、上記吸気マニホールドの隣接
するブランチ部間にステーを設け、該ステーにボルト孔
をその中心軸線の延長線が上記隣接するブランチ部間で
かつ上記サージタンクと上記ブランチ部下流端のフラン
ジとの間を抜けるように形成し、該ボルト孔に取付ボル
トを螺合させて該ボルトにより上記ステーにデリバリパ
イプを締付固定し、該デリバリパイプにより上記燃料噴
射弁を上記ブランチ部に押圧固定したことを特徴とする
燃料噴射式多気筒エンジンの噴射弁取付構造。(1) In a fuel injection multi-cylinder engine in which a fuel injection valve is provided in each of a plurality of branches of an intake manifold, and the upstream side of the branch part is curved toward the fuel injection valve side and connected to a surge tank, the intake manifold is connected to a surge tank. A stay is provided between adjacent branch parts of the manifold, and a bolt hole is provided in the stay so that an extension of the central axis of the stay passes between the adjacent branch parts and between the surge tank and a flange at the downstream end of the branch part. A mounting bolt is screwed into the bolt hole, a delivery pipe is tightened and fixed to the stay by the bolt, and the fuel injection valve is pressed and fixed to the branch part by the delivery pipe. Injector mounting structure for fuel-injected multi-cylinder engines.
JP59138579A 1984-07-04 1984-07-04 Mounting construction of injection valve in multi-cylinder fuel-injection engine Pending JPS6116262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59138579A JPS6116262A (en) 1984-07-04 1984-07-04 Mounting construction of injection valve in multi-cylinder fuel-injection engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59138579A JPS6116262A (en) 1984-07-04 1984-07-04 Mounting construction of injection valve in multi-cylinder fuel-injection engine

Publications (1)

Publication Number Publication Date
JPS6116262A true JPS6116262A (en) 1986-01-24

Family

ID=15225417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59138579A Pending JPS6116262A (en) 1984-07-04 1984-07-04 Mounting construction of injection valve in multi-cylinder fuel-injection engine

Country Status (1)

Country Link
JP (1) JPS6116262A (en)

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