JPH07247924A - Fuel injection device - Google Patents

Fuel injection device

Info

Publication number
JPH07247924A
JPH07247924A JP6764594A JP6764594A JPH07247924A JP H07247924 A JPH07247924 A JP H07247924A JP 6764594 A JP6764594 A JP 6764594A JP 6764594 A JP6764594 A JP 6764594A JP H07247924 A JPH07247924 A JP H07247924A
Authority
JP
Japan
Prior art keywords
chamber
intake
fuel injection
mounting flange
air
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
JP6764594A
Other languages
Japanese (ja)
Inventor
Kenichi Nomura
健一 野村
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.)
Keihin Corp
Original Assignee
Keihin Seiki Manufacturing Co Ltd
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 Keihin Seiki Manufacturing Co Ltd filed Critical Keihin Seiki Manufacturing Co Ltd
Priority to JP6764594A priority Critical patent/JPH07247924A/en
Publication of JPH07247924A publication Critical patent/JPH07247924A/en
Pending legal-status Critical Current

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  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE:To provide a fuel injection device furnished with an inlet passage, an air chamber and an inlet control passage inexpensively and to improve lubricating function by fuel for a shaft arranged in the inlet control passage. CONSTITUTION:This device is formed divided by a chamber part 1 and an inlet pipe part 7. The chamber part 1 opens 2A toward an inlet pipe installing flange 5 and an inlet control passage 6 opens toward upward on a side wall 4. An installation flange 8 is formed on one side of the inlet pipe part 7 and an installation flange 9 is formed on the other side, and a plural number of inlet passages are provided. An air chamber 11 is formed by connecting the installation flange 8 and the inlet pipe installation flange 5 to each other and blocking the opening 2A. The inlet control passage 6 is controlled to open and close by a throttle valve 83, a fuel injection valve is arranged in the chamber part 1, and fuel injected by a fuel injection valve is injected to the inside of the corresponding inlet passage 10.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、絞り弁にて制御された
空気を吸気路を介して機関へ供給するとともに燃料噴射
弁によって制御された燃料を吸気路内を流れる空気に向
けて噴射供給する燃料噴射装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies air controlled by a throttle valve to an engine via an intake passage, and also supplies fuel controlled by a fuel injection valve toward air flowing in the intake passage. Fuel injection device.

【0002】[0002]

【従来の技術】従来用いられる燃料噴射装置は、図4に
示される。図によって説明すると、燃料噴射装置は、吸
気管60と、エアチャンバー室70と、吸気制御管80
とによって構成され、エアチャンバー室70は図におい
て上方の側壁70Aに開口70Bが穿設された密閉形状
をなし、前記開口70Bには連結管71を介して吸気制
御管80が連結される。この吸気制御管80には吸気制
御通路81が貫通して穿設され、吸気制御通路81の開
口面積は吸気制御管80に回転自在に支持された軸82
に取着された絞り弁83によって制御される。一方、吸
気管60には複数の吸気路60Aが穿設され、この吸気
路60Aの一端はエアチャンバー室70に開口し、他端
は機関Eに向けて開口される。尚、Jは吸気管60の各
吸気路60A内に開口する燃料噴射弁である。
2. Description of the Related Art A conventional fuel injection device is shown in FIG. Referring to the drawings, the fuel injection device includes an intake pipe 60, an air chamber chamber 70, and an intake control pipe 80.
The air chamber 70 has a closed shape in which an opening 70B is formed in an upper side wall 70A in the drawing, and an intake control pipe 80 is connected to the opening 70B through a connecting pipe 71. An intake control passage 81 is bored through the intake control pipe 80, and the opening area of the intake control passage 81 is a shaft 82 rotatably supported by the intake control pipe 80.
It is controlled by the throttle valve 83 attached to the. On the other hand, a plurality of intake passages 60A are formed in the intake pipe 60, one end of the intake passage 60A is opened to the air chamber 70, and the other end is opened toward the engine E. In addition, J is a fuel injection valve which opens in each intake passage 60A of the intake pipe 60.

【0003】絞り弁83は運転者によって開閉操作され
るもので、絞り弁83によって制御された吸気制御通路
81内を流れる空気は連結管71を介してエアチャンバ
ー室70内に流入し、エアチャンバー室70内の空気は
吸気管60の各吸気路60Aを介して機関Eに向けて供
給される。一方、燃料噴射弁Jからは適正に制御された
燃料が各吸気路60A内に噴射されるもので、これによ
って吸気路60A内を流れる空気に燃料が混合され、も
って燃料と空気とを含む混合気が機関Eに向けて供給さ
れる。
The throttle valve 83 is opened / closed by a driver, and the air flowing in the intake control passage 81 controlled by the throttle valve 83 flows into the air chamber 70 through the connecting pipe 71, and the air chamber The air in the chamber 70 is supplied to the engine E via the intake passages 60A of the intake pipe 60. On the other hand, from the fuel injection valve J, appropriately controlled fuel is injected into each intake passage 60A, whereby the fuel is mixed with the air flowing through the intake passage 60A, and thus the mixture containing the fuel and the air is mixed. Qi is supplied to the engine E.

【0004】[0004]

【発明が解決しようとする課題】かかる従来の燃料噴射
装置によると、エアチャンバー室70が密閉室形状であ
ること、及びエアチャンバー室70の複数方向に開口が
穿設されること、(開口70B及び吸気路60Aが開口
されること)から吸気管60を含むエアチャンバー室7
0の製作が困難なるものであった。例えば金属材料(ア
ルミニウム合金、亜鉛合金等)を用いたダイカスト鋳
造、合成樹脂材料(ナイロン等)を用いた射出成型方法
にあっては、エアチャンバー室70内にアンダーカット
部分があることから成形不能であり、又、砂型を用いた
鋳物製法にあっては、製造可能なるも1個当りの製造に
多大な時間を必要として量産への対応に難点を有し、更
にはエアチャンバー室70内の内壁面を円滑とすること
が困難であって空気流れを阻害するという問題が生ず
る。
According to such a conventional fuel injection device, the air chamber 70 has a closed chamber shape, and the air chamber 70 is provided with openings in a plurality of directions (opening 70B). And the intake passage 60A is opened) to the air chamber 7 including the intake pipe 60.
It was difficult to make 0. For example, in the die casting method using a metal material (aluminum alloy, zinc alloy, etc.) and the injection molding method using a synthetic resin material (nylon, etc.), there is an undercut portion in the air chamber chamber 70, and therefore, molding cannot be performed. In addition, in the casting method using the sand mold, it is possible to manufacture, but it takes a lot of time to manufacture each piece, and there is a difficulty in mass production. Further, in the air chamber 70, There is a problem that it is difficult to smooth the inner wall surface and the air flow is obstructed.

【0005】一方、吸気制御管80とエアチャンバー室
70とを連結管71を用いて連結したことによると、燃
料噴射弁Jの噴孔と絞り弁83を支持する軸82との距
離が離れ、軸82の燃料による潤滑作用が低下するとい
う不具合を有するとともに部品点数、組付け工数、の増
加につながり好ましいものではない。
On the other hand, since the intake control pipe 80 and the air chamber chamber 70 are connected by the connecting pipe 71, the distance between the injection hole of the fuel injection valve J and the shaft 82 supporting the throttle valve 83 is increased, This is not preferable because it has a problem that the lubrication action of the shaft 82 due to the fuel is reduced and increases the number of parts and the number of assembling steps.

【0006】[0006]

【発明の目的】本発明は、かかる課題に鑑み成されたも
ので、吸気路、エアチャンバー室、吸気制御管、よりな
る燃料噴射装置を安価に製作することと、絞り弁を取着
せる軸の燃料による潤滑作用を向上させることを目的と
する。
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is possible to inexpensively manufacture a fuel injection device including an intake passage, an air chamber chamber, an intake control pipe, and a shaft to which a throttle valve can be attached. The purpose is to improve lubrication by fuel.

【0007】[0007]

【課題を解決する為の手段】前記目的は、吸気制御通路
内に絞り弁を備えた吸気制御管と、絞り弁より下流側の
吸気制御通路に接続されたエアチャンバー室と、一端が
エアチャンバー室に開口し、他端が機関に接続された複
数の吸気路と、を備え、吸気制御通路内を流れる空気を
絞り弁にて制御してエアチャンバー室内へ供給し、エア
チャンバー室内の空気を複数の吸気路を介して機関へ供
給するとともに吸気路を流れる空気に、燃料噴射弁より
燃料を噴射供給する燃料噴射装置において、燃料噴射装
置を、チャンバー部と吸気管部とにより区分形成し、チ
ャンバー部には、一側方に底部を有し、底部より他側方
の吸気管取付けフランジに向かって側壁がのび、その側
壁の端部に開口を有する有底筒状のチャンバー凹部と、
側壁に略直交して形成され、下端が側壁に開口するとと
もにその上端が大気に開口する吸気制御通路と、を設
け、吸気管部には、その一端にチャンバー側の取付けフ
ランジを形成し、他端に機関側の取付けフランジを形成
するとともに、一端がチャンバー側の取付けフランジに
開口し、他端が機関側の取付けフランジに開口する複数
の吸気路を穿設し、吸気管部のチャンバー側の取付けフ
ランジ上にチャンバー部の吸気管取付けフランジを接合
することによって、チャンバー凹部の開口を吸気管部の
チャンバー側の取付けフランジにて閉塞してエアチャン
バー室を形成するとともに吸気管部の各吸気路をエアチ
ャンバー室内に開口し、吸気制御通路内には軸に取着さ
れた絞り弁を配置するとともにチャンバー部にはエアチ
ャンバー室を介して各吸気路内に燃料を噴射する複数の
燃料噴射弁を配置したことによって達成される。
The object is to provide an intake control pipe having a throttle valve in the intake control passage, an air chamber chamber connected to the intake control passage downstream of the throttle valve, and one end of the air chamber. A plurality of intake passages that are open to the chamber and the other end of which is connected to the engine, and the air flowing in the intake control passage is controlled by a throttle valve to be supplied to the air chamber interior, In a fuel injection device that supplies fuel to an engine through a plurality of intake passages and injects fuel from a fuel injection valve into air flowing through the intake passages, the fuel injection device is divided into a chamber portion and an intake pipe portion, The chamber portion has a bottom on one side, a side wall extends from the bottom toward the intake pipe mounting flange on the other side, and a bottomed cylindrical chamber recess having an opening at the end of the side wall,
An intake control passage which is formed substantially orthogonal to the side wall and has a lower end opening to the side wall and an upper end opening to the atmosphere; and an intake pipe portion having a chamber side mounting flange formed at one end thereof, and the like. Along with forming a mounting flange on the engine side at one end, a plurality of intake passages with one end opening to the mounting flange on the chamber side and the other end opening to the mounting flange on the engine side are formed. By joining the intake pipe mounting flange of the chamber portion onto the mounting flange, the opening of the chamber recess is closed by the chamber side mounting flange of the intake pipe portion to form the air chamber chamber, and each intake passage of the intake pipe portion is formed. Is opened in the air chamber, and a throttle valve attached to the shaft is arranged in the intake control passage, and the chamber is connected to the air chamber through the air chamber. It is achieved by arranging the plurality of fuel injection valve for injecting fuel into the intake passage.

【0008】[0008]

【作用】燃料噴射装置は、チャンバー部と吸気管部とに
よって分割されて形成され、チャンバー部に形成される
チャンバー凹部は他側方に向かって開口するとともに、
チャンバー凹部の側壁に略直交して吸気制御通路が開口
して穿設され、又吸気管部にあっては吸気路が側方に向
かって開口して穿設されるので、それらのチャンバー
部、吸気管部にアンダーカット部を有するものでなく、
ダイカスト鋳造又は射出成形による成形が可能となった
ものである。又、その組付けは、吸気管部のチャンバー
側の取付けフランジ上にチャンバー部の吸気管取付けフ
ランジを単に接合すれば良いのである。而して燃料噴射
装置を安価に提供できる。更に、絞り弁を取着せる軸は
チャンバー凹部に直接的に開口する吸気制御通路に配置
されるとともに燃料噴射弁をエアチャンバー部に配置
し、エアチャンバー室を介して各吸気路内に向けて燃料
を噴射供給したので軸は燃料噴射弁より噴射される燃料
によって良好な潤滑を得られる。
The fuel injection device is formed by being divided into the chamber portion and the intake pipe portion, and the chamber recess formed in the chamber portion opens toward the other side and
The intake control passage is opened and formed substantially orthogonal to the side wall of the chamber recess, and in the intake pipe portion, the intake passage is opened and opened laterally. The intake pipe section does not have an undercut section,
It is possible to perform molding by die casting or injection molding. Further, the assembling may be performed by simply joining the intake pipe mounting flange of the chamber portion to the chamber side mounting flange of the intake pipe portion. Thus, the fuel injection device can be provided at low cost. Further, the shaft to which the throttle valve can be attached is arranged in the intake control passage which opens directly into the chamber recess, and the fuel injection valve is arranged in the air chamber portion, and the fuel is injected toward each intake passage through the air chamber chamber. Since the fuel is injected and supplied, the shaft can obtain good lubrication by the fuel injected from the fuel injection valve.

【0009】[0009]

【実施例】以下、本発明になる燃料噴射装置の1実施例
を図1、図2、図3によって説明する。図1はその縦断
面図、図2は図1のX−X線による横断面図、図3はチ
ャンバー部の斜視図である。1はチャンバー部であって
以下により形成される。2は一側方(図において左方)
の底部3より側壁4が他側方(図において右側)に向か
ってのび、その他側端に開口2Aを有する有底筒状のチ
ャンバー凹部であり、前記開口2Aの外周部分には、平
坦状をなす吸気管取付けフランジ5が形成される。又、
チャンバー凹部2の側壁4に略直交して吸気制御通路6
の下端が直接的に開口し、吸気制御通路6の上端は上方
へ突出して開口する。更に又、チャンバー凹部2の側壁
4には、燃料噴射弁Jを取りつける為の取りつけ座面4
Aが形成されるもので、この取りつけ座面4Aにはチャ
ンバー凹部2内に開口する孔4Bが穿設される。本例に
あって、燃料噴射弁Jは4個配置されたもので、この為
にチャンバー凹部2には4個の取りつけ座面4Aと孔4
Bが形成された。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fuel injection device according to the present invention will be described below with reference to FIGS. 1, 2 and 3. 1 is a vertical sectional view thereof, FIG. 2 is a horizontal sectional view taken along line XX of FIG. 1, and FIG. 3 is a perspective view of a chamber portion. Reference numeral 1 is a chamber portion, which is formed by the following. 2 is one side (left side in the figure)
Is a bottomed cylindrical chamber recess having a side wall 4 extending from the bottom portion 3 toward the other side (right side in the figure) and having an opening 2A at the other side end, and a flat shape is provided on the outer peripheral portion of the opening 2A. An egg intake pipe mounting flange 5 is formed. or,
The intake control passage 6 is formed substantially perpendicular to the side wall 4 of the chamber recess 2.
Of the intake control passage 6 is directly opened, and the upper end of the intake control passage 6 is opened so as to project upward. Furthermore, the side wall 4 of the chamber recess 2 has a mounting seat surface 4 for mounting the fuel injection valve J.
A is formed, and a hole 4B that opens into the chamber recess 2 is formed in this mounting seat surface 4A. In this example, four fuel injection valves J are arranged, and therefore four mounting seat surfaces 4A and holes 4 are provided in the chamber recess 2.
B was formed.

【0010】そして、かかるチャンバー部1をダイカス
ト鋳造あるいは合成樹脂材料を用いた射出成形によって
成形する際、その外形部分とチャンバー凹部2とは可動
金型及び固定金型によって行なわれ、吸気制御通路6は
図1において上下方向に移動する可動中子によって行な
われる。これらが行なわれることは、前述したチャンバ
ー凹部2及び吸気制御通路6の構造に基づくもので、可
動、固定、金型及び可動中子に対するアンダーカット部
分を有しないからである。
When the chamber 1 is molded by die casting or injection molding using a synthetic resin material, the outer shape of the chamber 1 and the chamber recess 2 are formed by a movable mold and a fixed mold, and the intake control passage 6 is formed. Is performed by a movable core that moves vertically in FIG. The reason why these operations are performed is based on the structures of the chamber recess 2 and the intake control passage 6 described above, and there is no undercut portion for the movable, fixed, mold and movable core.

【0011】7は吸気管部であって以下の構成よりな
る。8は一端(図において左方端)に形成されたチャン
バー側の取付けフランジであり、他端(図において右方
端)には機関側の取付けフランジ9が形成される。そし
てチャンバー側の取付けフランジ8から機関側の取付け
フランジ9に向けて複数の吸気路10が穿設される。す
なわち吸気路10の一側方は吸気管取付けフランジ5に
開口し、他側方は機関側の取付けフランジ9に開口す
る。尚、本実施例において、この吸気路10は上下方向
に4個設けたものであるが吸気路10の数、及び配置は
搭載される機関に応じて適宜設計される。
Reference numeral 7 denotes an intake pipe portion having the following structure. Reference numeral 8 denotes a chamber side mounting flange formed at one end (the left end in the drawing), and an engine side mounting flange 9 is formed at the other end (the right end in the drawing). A plurality of intake passages 10 are bored from the chamber-side mounting flange 8 toward the engine-side mounting flange 9. That is, one side of the intake passage 10 is opened to the intake pipe mounting flange 5, and the other side is opened to the engine side mounting flange 9. In the present embodiment, four intake passages 10 are provided in the vertical direction, but the number and arrangement of the intake passages 10 are appropriately designed according to the installed engine.

【0012】そして、かかる吸気管部7をダイカスト鋳
造あるいは合成樹脂材料を用いた射出成形によって成形
する際、その外形部分は可動金型及び固定金型によって
行なわれ、吸気路10は図において左右方向に移動する
可動中子によって行なわれる。これらが行なわれること
は、前述した吸気管部7の構造に基づいて、可動、固
定、金型及び可動中子に対するアンダーカット部分を有
しないからである。以上によってチャンバー部1及び吸
気管部7が格別に用意された。
When the intake pipe portion 7 is formed by die casting or injection molding using a synthetic resin material, its outer shape is formed by a movable mold and a fixed mold, and the intake passage 10 is shown in the left-right direction in the drawing. It is performed by a movable core that moves to. This is done because there is no undercut portion for the movable, fixed, mold and movable core based on the structure of the intake pipe section 7 described above. Through the above steps, the chamber portion 1 and the intake pipe portion 7 were specially prepared.

【0013】そして、チャンバー部1と吸気管部7とは
次の如く組付けられる。チャンバー部1の吸気管取付け
フランジ5上に、吸気管部7のチャンバー側のフランジ
8を配置し、かかる状態において両フランジ5,8を接
合して一体化する。この接合はビスを用いたネジ止め、
接着剤による接着、弾性金属材料よりなるフリップ、孔
と係止突部による嵌合、等いかなる接合方法であっても
よい。以上によると、チャンバー部1の開口2Aは吸気
管部7のチャンバー側の取付けフランジ8によって閉塞
され、これによってチャンバー凹部2は密閉状をなすエ
アチャンバー室11として形成される。そして、吸気管
部7の各吸気路10の一側方(図において左方)はエア
チャンバー室11内に開口し、吸気制御通路6の下方の
開口はエアチャンバー室11内に開口する。
The chamber portion 1 and the intake pipe portion 7 are assembled as follows. On the intake pipe mounting flange 5 of the chamber portion 1, the chamber side flange 8 of the intake pipe portion 7 is arranged, and in such a state, both flanges 5 and 8 are joined and integrated. This joint is screwed using screws,
Any joining method such as adhesion with an adhesive, flipping made of an elastic metal material, fitting with a hole and a locking projection may be used. According to the above, the opening 2A of the chamber portion 1 is closed by the mounting flange 8 on the chamber side of the intake pipe portion 7, whereby the chamber recess 2 is formed as an air chamber chamber 11 having a closed state. Then, one side (the left side in the drawing) of each intake passage 10 of the intake pipe portion 7 opens into the air chamber chamber 11, and the opening below the intake control passage 6 opens into the air chamber chamber 11.

【0014】尚、軸82と絞り弁83は、吸気制御通路
6に配置され、燃料噴射弁Jはチャンバー部1の各取つ
け座面4A上に配置され、燃料噴射弁Jの噴孔(図示せ
ず)は孔4Bを介してエアチャンバー室11内に臨んで
配置される。かかる、軸82、絞り弁83、燃料噴射弁
J、の組付けはチャンバー部1の単品時でも、それらを
組付けた後であってもよい。
The shaft 82 and the throttle valve 83 are arranged in the intake control passage 6, the fuel injection valve J is arranged on each mounting seat surface 4A of the chamber 1, and the injection hole of the fuel injection valve J (see FIG. (Not shown) is arranged to face the inside of the air chamber 11 through the hole 4B. The shaft 82, the throttle valve 83, and the fuel injection valve J may be assembled either when the chamber 1 is used alone or after they are assembled.

【0015】以上の如く組付けられた燃料噴射装置によ
ると、吸気制御通路6内を流れる空気は、絞り弁83に
よってその量が制御されてエアチャンバー室11内に流
入し、エアチャンバー室11内の空気は、各吸気路10
によって分流されて機関に向けて供給され、一方、燃料
噴射弁Jより噴射される燃料は、各吸気路10に臨んだ
エアチャンバー室11内に噴射され、エアチャンバー室
11より各吸気路10内を流れる空気に向けて噴射供給
され、もって機関の運転を満足させる。
According to the fuel injection device assembled as described above, the amount of the air flowing in the intake control passage 6 is controlled by the throttle valve 83 to flow into the air chamber chamber 11, and the inside of the air chamber chamber 11 is controlled. The air of each intake passage 10
The fuel that is split by the fuel injection valve J is injected into the air chambers 11 facing the respective intake passages 10, and the fuel is injected from the air chambers 11 into the respective intake passages 10. It is injected and supplied toward the air flowing through the engine, thus satisfying the operation of the engine.

【0016】[0016]

【発明の効果】以上よりなる本発明の燃料噴射装置によ
ると次の格別なる効果を奏する。 チャンバー部、吸気管部には、ダイカスト鋳造及び
射出成形時において使用される金型及び中子の製作にあ
たって、アンダーカット部を有するものでないので、そ
れらの製造をダイカスト鋳造及び射出成形によって行な
うことが可能となるもので、それらの製造を極めて簡単
にして且つ効率的に行ない得るもので、製造コストを大
きく低減できたものである。 チャンバー部と吸気管部との接合は単に互いに対向
するフランジを重ね、それらを接合すればよく、しかも
それらの接合は通常一般的に行なわれる接合方法を用い
て極めて容易に行なうことができ、さらにはチャンバー
部の吸気管取付けフランジと吸気管部のチャンバー側の
フランジとの一回の接合でよいのでその組付けコストを
安価にできたもので、前記製造コストの低減とあいまっ
て燃料噴射装置を安価に提供できるものである。 軸は、チャンバー部に直接的に配置される吸気制御
通路に何等の連結管を介することなく直接的に配置され
たので、軸は、エアチャンバー室の近傍に配置すること
が可能と成ったものであり、さらには、燃料噴射弁をチ
ャンバー部に配置し、燃料噴射弁より噴射される燃料を
エアチャンバー室内に噴射したので、燃料噴射弁より噴
射された燃料による軸の潤滑が効率的に行なわれるもの
で軸の回転性を長期間に渡って安定して維持することが
できる。特に、海上で使用される船外機用機関に搭載さ
れ、吸気制御通路内を塩分が含まれた空気が流下する海
上使用時における燃料噴射装置において好適である。
According to the fuel injection device of the present invention as described above, the following special effects are obtained. Since the chamber part and the intake pipe part do not have an undercut part when manufacturing a die and a core used at the time of die casting and injection molding, they can be manufactured by die casting and injection molding. What is possible is that these can be manufactured extremely easily and efficiently, and the manufacturing cost can be greatly reduced. The chamber portion and the intake pipe portion may be simply joined by stacking the flanges facing each other and joining them, and further, the joining can be performed very easily by using a generally-used joining method. Since the intake pipe mounting flange of the chamber portion and the chamber side flange of the intake pipe portion may be joined once, the assembly cost can be reduced, and the fuel injection device can be used together with the reduction of the manufacturing cost. It can be provided at a low cost. Since the shaft is directly arranged in the intake control passage which is directly arranged in the chamber portion without any connecting pipe, the shaft can be arranged in the vicinity of the air chamber chamber. Further, since the fuel injection valve is arranged in the chamber portion and the fuel injected from the fuel injection valve is injected into the air chamber chamber, the shaft injected by the fuel injected from the fuel injection valve is efficiently lubricated. The rotatability of the shaft can be maintained stably over a long period of time. In particular, it is suitable for a fuel injection device mounted on an outboard engine used at sea and used at sea when air containing salt flows down in the intake control passage.

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

【図1】本発明になる燃料噴射装置の一実施例を示す縦
断面図。
FIG. 1 is a vertical sectional view showing an embodiment of a fuel injection device according to the present invention.

【図2】図1のX−Xにおける横断面図。FIG. 2 is a cross-sectional view taken along line XX of FIG.

【図3】本発明のチャンバー部の斜視図。FIG. 3 is a perspective view of a chamber portion of the present invention.

【図4】従来の燃料噴射装置の縦断面図。FIG. 4 is a vertical cross-sectional view of a conventional fuel injection device.

【符号の説明】[Explanation of symbols]

1 チャンバー部 2 チャンバー凹部 2A チャンバー凹部の開口 3 底部 4 側壁 5 吸気管取付けフランジ 6 吸気制御通路 7 吸気管部 8 チャンバー側の取付けフランジ 9 機関側の取付けフランジ 10 吸気路 11 エアチャンバー室 82 軸 83 絞り弁 J 燃料噴射弁 DESCRIPTION OF SYMBOLS 1 chamber part 2 chamber recess 2A opening of chamber recess 3 bottom 4 sidewall 5 intake pipe mounting flange 6 intake control passage 7 intake pipe part 8 chamber side mounting flange 9 engine side mounting flange 10 intake passage 11 air chamber chamber 82 shaft 83 Throttle valve J Fuel injection valve

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 F02M 69/04 P F02M 35/10 301 P 301 R 69/00 350 P ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display area F02M 69/04 P F02M 35/10 301 P 301 R 69/00 350 P

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 吸気制御通路内に絞り弁を備えた吸気制
御管と、絞り弁より下流側の吸気制御通路に接続された
エアチャンバー室と、一端がエアチャンバー室に開口
し、他端が機関に接続された複数の吸気路と、を備え、
吸気制御通路内を流れる空気を絞り弁にて制御してエア
チャンバー室内へ供給し、エアチャンバー室内の空気を
複数の吸気路を介して機関へ供給するとともに吸気路を
流れる空気に、燃料噴射弁より燃料を噴射供給する燃料
噴射装置において、燃料噴射装置を、チャンバー部1と
吸気管部7とにより区分形成し、チャンバー部1には、
一側方に底部3を有し、底部3より他側方の吸気管取付
けフランジ5に向かって側壁がのび、その側壁の端部に
開口2Aを有する有底筒状のチャンバー凹部2と、側壁
に略直交して形成され、下端が側壁に開口するとともに
その上端が大気に開口する吸気制御通路と、を設け、吸
気管部7には、その一端にチャンバー側の取付けフラン
ジ8を形成し、他端に機関側の取付けフランジ9を形成
するとともに、一端がチャンバー側の取付けフランジ8
に開口し、他端が機関側の取付けフランジ9に開口する
複数の吸気路10を穿設し、吸気管部7のチャンバー側
の取付けフランジ8上にチャンバー部1の吸気管取付け
フランジ5を接合することによって、チャンバー凹部2
の開口2Aを吸気管部7のチャンバー側の取付けフラン
ジ8にて閉塞してエアチャンバー室11を形成するとと
もに吸気管部7の各吸気路10をエアチャンバー室11
内に開口し、吸気制御通路6内には軸82に取着された
絞り弁83を配置するとともにチャンバー部にはエアチ
ャンバー室を介して各吸気路内に燃料を噴射する複数の
燃料噴射弁を配置したことを特徴とする燃料噴射装置。
1. An intake control pipe having a throttle valve in the intake control passage, an air chamber connected to an intake control passage downstream of the throttle valve, one end of which opens to the air chamber and the other end of which opens. And a plurality of intake passages connected to the engine,
The air that flows in the intake control passage is controlled by the throttle valve to be supplied into the air chamber chamber, and the air in the air chamber chamber is supplied to the engine through a plurality of intake passages and the air flowing through the intake passage to the fuel injection valve. In the fuel injection device for injecting more fuel, the fuel injection device is divided into the chamber portion 1 and the intake pipe portion 7, and the chamber portion 1 includes
A bottomed cylindrical chamber recess 2 having a bottom portion 3 on one side, a side wall extending toward the intake pipe mounting flange 5 on the other side from the bottom portion 3, and an opening 2A at an end portion of the side wall, and a side wall. And an intake control passage whose lower end opens to the side wall and whose upper end opens to the atmosphere. The intake pipe section 7 has a chamber side mounting flange 8 formed at one end thereof. An engine-side mounting flange 9 is formed at the other end, and one end of the chamber-side mounting flange 8 is formed.
A plurality of intake passages 10 are opened, and the other end is opened to a mounting flange 9 on the engine side, and the intake pipe mounting flange 5 of the chamber portion 1 is joined to the chamber side mounting flange 8 of the intake pipe portion 7. The chamber recess 2
2A is closed by a mounting flange 8 on the chamber side of the intake pipe portion 7 to form an air chamber chamber 11, and each intake passage 10 of the intake pipe portion 7 is connected to the air chamber chamber 11
A plurality of fuel injection valves that are open to the inside and that have a throttle valve 83 attached to a shaft 82 in the intake control passage 6 and inject fuel into each intake passage through the air chamber chamber in the chamber portion. A fuel injection device characterized in that.
JP6764594A 1994-03-10 1994-03-10 Fuel injection device Pending JPH07247924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6764594A JPH07247924A (en) 1994-03-10 1994-03-10 Fuel injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6764594A JPH07247924A (en) 1994-03-10 1994-03-10 Fuel injection device

Publications (1)

Publication Number Publication Date
JPH07247924A true JPH07247924A (en) 1995-09-26

Family

ID=13350967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6764594A Pending JPH07247924A (en) 1994-03-10 1994-03-10 Fuel injection device

Country Status (1)

Country Link
JP (1) JPH07247924A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045236A1 (en) 2003-11-07 2005-05-19 Yamaha Hatsudoki Kabushiki Kaisha Fuel supply device, vehicle, and fuel supply device assembling method
JP2006207405A (en) * 2005-01-26 2006-08-10 Honda Motor Co Ltd Intake device for multicylinder engine
US7216627B2 (en) 2005-03-18 2007-05-15 Toyota Jidosha Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7281517B2 (en) 2005-03-18 2007-10-16 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7296558B2 (en) 2005-03-18 2007-11-20 Yamaha Hatsudoki Kabushiki Kaisha Dual-injector fuel injection engine
US7299784B2 (en) 2005-03-18 2007-11-27 Toyota Jidosha Kabushiki Kaisha Internal combustion engine
US7637242B2 (en) 2004-03-22 2009-12-29 Yamaha Motor Co., Ltd. Fuel supply system and vehicle
JP2010518306A (en) * 2007-02-08 2010-05-27 カスチリョーニ クラウディオ Intake device for motorcycle engine
DE102004013309B4 (en) * 2004-03-17 2015-09-24 Mahle Filtersysteme Gmbh Intake system for an internal combustion engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045236A1 (en) 2003-11-07 2005-05-19 Yamaha Hatsudoki Kabushiki Kaisha Fuel supply device, vehicle, and fuel supply device assembling method
DE102004013309B4 (en) * 2004-03-17 2015-09-24 Mahle Filtersysteme Gmbh Intake system for an internal combustion engine
US7637242B2 (en) 2004-03-22 2009-12-29 Yamaha Motor Co., Ltd. Fuel supply system and vehicle
JP2006207405A (en) * 2005-01-26 2006-08-10 Honda Motor Co Ltd Intake device for multicylinder engine
US7216627B2 (en) 2005-03-18 2007-05-15 Toyota Jidosha Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7281517B2 (en) 2005-03-18 2007-10-16 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine provided with double system of fuel injection
US7296558B2 (en) 2005-03-18 2007-11-20 Yamaha Hatsudoki Kabushiki Kaisha Dual-injector fuel injection engine
US7299784B2 (en) 2005-03-18 2007-11-27 Toyota Jidosha Kabushiki Kaisha Internal combustion engine
JP2010518306A (en) * 2007-02-08 2010-05-27 カスチリョーニ クラウディオ Intake device for motorcycle engine

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