JP2528399Y2 - Electromagnetic fuel injection valve - Google Patents

Electromagnetic fuel injection valve

Info

Publication number
JP2528399Y2
JP2528399Y2 JP1990075457U JP7545790U JP2528399Y2 JP 2528399 Y2 JP2528399 Y2 JP 2528399Y2 JP 1990075457 U JP1990075457 U JP 1990075457U JP 7545790 U JP7545790 U JP 7545790U JP 2528399 Y2 JP2528399 Y2 JP 2528399Y2
Authority
JP
Japan
Prior art keywords
fuel
fuel injection
branch
injection
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.)
Expired - Lifetime
Application number
JP1990075457U
Other languages
Japanese (ja)
Other versions
JPH0432257U (en
Inventor
敏朗 牧村
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.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry 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 Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Priority to JP1990075457U priority Critical patent/JP2528399Y2/en
Publication of JPH0432257U publication Critical patent/JPH0432257U/ja
Application granted granted Critical
Publication of JP2528399Y2 publication Critical patent/JP2528399Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Fuel-Injection Apparatus (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、1気筒当たり吸気バルブを複数個有する多
弁エンジンに用いられる電磁式燃料噴射弁の構造に関す
る。
DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a structure of an electromagnetic fuel injection valve used in a multi-valve engine having a plurality of intake valves per cylinder.

(従来の技術) 従来から、燃料の計量を行う一つの燃料噴射孔の下流
に、該燃料噴射孔からの燃料をエンジンの各吸気通路方
向に分岐させる噴射燃料通路を設けた燃料噴射弁が、先
に本出願人により提案されている(たとえば実願昭60-3
4717号、実願昭60-95151号)。
(Prior Art) Conventionally, a fuel injection valve provided with an injection fuel passage downstream of one fuel injection hole for measuring fuel to branch fuel from the fuel injection hole toward each intake passage of the engine, Has already been proposed by the present applicant (for example,
No. 4717, No. 60-95151).

第6図及び第7図は、上述の電磁式燃料噴射弁の一例
を示している。このような電磁式燃料噴射弁では、噴射
燃料を計量する一つの燃料噴射孔1の下流に、燃料噴射
孔1から噴射された燃料を所定方向に分岐させる燃料分
岐部2が設けられており、燃料分岐部2によって分岐さ
れた燃料は、各噴射燃料通路3を通って吸気弁方向に噴
射されるようになっている。
6 and 7 show an example of the above-described electromagnetic fuel injection valve. In such an electromagnetic fuel injection valve, a fuel branch portion 2 that branches fuel injected from the fuel injection hole 1 in a predetermined direction is provided downstream of one fuel injection hole 1 that measures injected fuel. The fuel branched by the fuel branch 2 is injected in the direction of the intake valve through each injection fuel passage 3.

(考案が解決しようとする課題) しかしながら、上述の電磁式燃料噴射弁に設けた燃料
を分岐する噴射燃料通路は斜めに設けられているため、
エンジン吸気バルブに燃料が到達するときには大きな広
がりになってしまい、吸気管の途中の壁面に燃料が付着
してしまい、燃焼への悪影響、エミッションの悪化、燃
費の悪化等のおそれがある。
(Problems to be Solved by the Invention) However, since the injection fuel passage for branching the fuel provided in the above-mentioned electromagnetic fuel injection valve is provided diagonally,
When the fuel reaches the engine intake valve, the fuel spreads greatly, and the fuel adheres to a wall in the middle of the intake pipe, which may adversely affect combustion, deteriorate emission, deteriorate fuel efficiency, and the like.

本考案は、上記の問題を解決するために、一つの計量
用燃料噴射孔及び複数の分岐用噴射燃料通路を有する電
磁式燃料噴射弁において、噴射される燃料の噴射角度を
小さくすることを目的とする。
An object of the present invention is to reduce the injection angle of injected fuel in an electromagnetic fuel injection valve having one metering fuel injection hole and a plurality of branch injection fuel passages in order to solve the above problem. And

(課題を解決するための手段) 前記課題を解決する本考案の電磁式燃料噴射弁は、燃
料の計量を行う一つの燃料噴射孔の下流に、該燃料噴射
孔から噴射された噴射燃料を分流するために、通路軸線
が所定の開き角αをなすように燃料分岐部によって分岐
されかつその燃料分岐部による通路壁面を分岐斜面とす
る噴射燃料通路を有する電磁式燃料噴射弁において、前
記燃料分岐部の分岐斜面の出口部には、その下流側に延
びる延長線が燃料分岐部の中心線と交差するように傾斜
させた傾斜面を形成したものである。
(Means for Solving the Problems) The electromagnetic fuel injection valve of the present invention for solving the above problems shunts the fuel injected from the fuel injection holes downstream of one fuel injection hole for measuring the fuel. In the electromagnetic fuel injection valve having an injection fuel passage branched by a fuel branch so that a passage axis forms a predetermined opening angle α and a passage wall surface formed by the fuel branch is a branched slope, The outlet of the branch slope of the section is formed with a slope that is inclined such that an extension line extending downstream thereof intersects the center line of the fuel branch.

(作用) 前記手段の電磁式燃料噴射弁によれば、燃料噴射孔か
ら噴射された燃料は、燃料分岐部の分岐斜面によって所
定の開き角αの各噴射燃料通路に分岐され、その各噴射
燃料通路からそれぞれ噴射される。このとき、燃料分岐
部の分岐斜面に沿って流れてきた燃料の壁面流が傾斜面
によって燃料分岐部の中心に向けて折曲されて各燃料噴
射通路から噴射されることにより、燃料の噴射角度が噴
射燃料通路の開き角αより小さくなる。従って、従来の
ものに生じた噴射燃料の吸気管への付着を防止すること
ができる。
(Operation) According to the electromagnetic fuel injection valve of the above means, the fuel injected from the fuel injection hole is branched into the respective injection fuel passages having the predetermined opening angle α by the branch slope of the fuel branch portion. Each is injected from a passage. At this time, the wall flow of the fuel flowing along the branch slope of the fuel branch is bent toward the center of the fuel branch by the slope and is injected from each fuel injection passage, so that the fuel injection angle is increased. Becomes smaller than the opening angle α of the injection fuel passage. Therefore, it is possible to prevent the conventional fuel from sticking to the intake pipe of the injected fuel.

(実施例) 以下に、本考案の電磁式燃料噴射弁の望ましい実施例
を、図面を参照して説明する。
(Embodiment) Hereinafter, a preferred embodiment of the electromagnetic fuel injection valve of the present invention will be described with reference to the drawings.

第1図ないし第3図は、本考案の一実施例に係る電磁
式燃料噴射弁を示している。図において、11は燃料噴射
弁全体を示しており、12は燃料供給通路を示している。
燃料噴射弁11の先端部には、燃料供給通路12からの燃料
を計量する一つの燃料噴射孔13が設けられており、燃料
噴射孔13への燃料を制御するために、バルブ14と円錐面
状の内壁面15によりシール部16が構成されている。
1 to 3 show an electromagnetic fuel injection valve according to an embodiment of the present invention. In the figure, 11 indicates the entire fuel injection valve, and 12 indicates a fuel supply passage.
At the tip of the fuel injection valve 11, one fuel injection hole 13 for measuring the fuel from the fuel supply passage 12 is provided.To control the fuel to the fuel injection hole 13, the valve 14 and the conical surface A sealing portion 16 is formed by the inner wall surface 15 having a shape.

燃料噴射孔13の下流側には、アダプタ17が取り付けら
れている。アダプタ17には、燃料噴射孔13からの燃料を
分流させて出口から噴射する二つの任意形状断面の噴射
燃料通路18a、18bと、この噴射燃料通路18a、18bと燃料
噴射孔13との間に位置する噴射燃料通路の合流部19が設
けられている。この噴射燃料通路18a、18bは、本実施例
では断面円状に形成されており、合流部19からは、その
下流側に位置する断面逆V字状の燃料分岐部20によっ
て、その噴射燃料通路18a、18bの通路軸線21a、21bが所
定の開き角αになるように分岐されている。噴射燃料通
路18a、18bは燃料分岐部20による通路壁面を分岐斜面20
a,20bとしている。
An adapter 17 is attached downstream of the fuel injection hole 13. The adapter 17 has two arbitrarily-shaped injection fuel passages 18a and 18b for diverting the fuel from the fuel injection holes 13 and injecting the fuel from the outlet, and between the injection fuel passages 18a and 18b and the fuel injection holes 13. A converging portion 19 of the located injection fuel passage is provided. In the present embodiment, the injection fuel passages 18a and 18b are formed in a circular cross section. From the junction 19, the injection fuel passage is formed by a fuel branching portion 20 having an inverted V-shaped cross section located downstream thereof. The passage axes 21a and 21b of the passages 18a and 18b are branched so as to have a predetermined opening angle α. The injection fuel passages 18a and 18b are formed by dividing the passage wall surface by the fuel branch portion 20 with the slope 20
a, 20b.

第1図に示すように、前記燃料分岐部20の分岐斜面20
a,20bの出口部には、その下流側に延びる延長線La,Lbが
燃料分岐部20の中心線CLと交差するように傾斜させた傾
斜面23a,23bが形成されている。なお本例の場合、各燃
料噴射通路18a、18bの出口部にその燃料噴射通路18a、1
8bの口径より先端開口側の口径を大きくするテーパ孔を
形成することにより、前記傾斜面23a,23bを形成してい
る。
As shown in FIG. 1, a branch slope 20 of the fuel branch section 20 is formed.
At the outlets of a and 20b, inclined surfaces 23a and 23b are formed so that the extension lines La and Lb extending downstream thereof intersect with the center line CL of the fuel branching portion 20. In the case of this example, the fuel injection passages 18a, 18b are provided at the outlets of the respective fuel injection passages 18a, 18b.
The inclined surfaces 23a and 23b are formed by forming a tapered hole whose diameter on the tip end opening side is larger than the diameter of 8b.

つぎに、上記の電磁式燃料噴射弁における作用につい
て説明する。
Next, the operation of the electromagnetic fuel injection valve will be described.

燃料供給通路12からシール部16を通して送られてきた
燃料は、まず一つの燃料噴射孔13によって設定流量にな
るよう計量される。そして、計量された燃料は、アダプ
タ17の合流部19内に入り、燃料分岐部20の頂部22の位置
より分岐斜面20a,20bによって各噴射燃料通路18a、18b
に分岐された後、その各噴射燃料通路18a、18bからそれ
ぞれ噴射される。
The fuel sent from the fuel supply passage 12 through the seal portion 16 is first measured by one fuel injection hole 13 so as to have a set flow rate. Then, the metered fuel enters the junction 19 of the adapter 17 and branches from the position of the top 22 of the fuel branch 20 to the respective injection fuel passages 18a, 18b by the branch slopes 20a, 20b.
After that, the fuel is injected from each of the injection fuel passages 18a and 18b.

このとき、燃料分岐部20の分岐斜面20a,20bに沿って
流れてきた燃料の壁面流が傾斜面23a,23bによって燃料
分岐部20の中心に向けて折曲されて各燃料噴射通路18
a、18bから噴射されることにより、燃料の噴射角度が噴
射燃料通路18a、18bの開き角度αより小さくなる。
At this time, the wall flow of the fuel flowing along the branch slopes 20a and 20b of the fuel branch 20 is bent toward the center of the fuel branch 20 by the slopes 23a and 23b, and each fuel injection passage 18
The fuel injection angle is smaller than the opening angle α of the fuel injection passages 18a and 18b by being injected from the fuel injection passages a and 18b.

第4図は、本考案の電磁式燃料噴射弁と従来の電磁式
燃料噴射弁との燃料噴霧の噴射状態を示したものであ
る。図中、(イ)は本考案の電磁式燃料噴射弁の噴射状
態を示し、(ロ)は従来の電磁式燃料噴射弁の噴射状態
を示している。図に示すように、本考案の(イ)は、従
来の(ロ)に比べて噴射角度が小さくなっており、噴射
燃料通路18a、18bの開き角度α(第1図参照)よりも小
さい噴射角度で燃料を噴射することができる。従って、
第5図に示されるように、噴射燃料を吸気管25の途中の
壁面に付着しないように吸気バルブ26に到達させること
ができるので、燃料の燃焼を良好とし、エミッション及
び燃費を改善することができる。
FIG. 4 shows the injection state of the fuel spray between the electromagnetic fuel injection valve of the present invention and the conventional electromagnetic fuel injection valve. In the figure, (a) shows the injection state of the electromagnetic fuel injection valve of the present invention, and (b) shows the injection state of the conventional electromagnetic fuel injection valve. As shown in the drawing, the injection angle of (a) of the present invention is smaller than that of the conventional (b), and the injection angle is smaller than the opening angle α of the injection fuel passages 18a and 18b (see FIG. 1). Fuel can be injected at an angle. Therefore,
As shown in FIG. 5, the injected fuel can reach the intake valve 26 so as not to adhere to the wall surface in the middle of the intake pipe 25, so that the fuel combustion can be improved, and the emission and fuel efficiency can be improved. it can.

(考案の効果) 本考案の電磁式燃料噴射弁によれば、燃料分岐部の分
岐斜面に沿って流れてきた燃料の壁面流が傾斜面によっ
て燃料分岐部の中心に向けて折曲されることにより、燃
料の噴射角度を噴射燃料通路の開き角αより小さくする
ことができ、よって従来のものに生じた噴射燃料の吸気
管への付着を防止することで、燃料の燃焼を良好とし、
エミッション及び燃費を改善することができる。
(Effect of the Invention) According to the electromagnetic fuel injection valve of the present invention, the wall flow of the fuel flowing along the branch slope of the fuel branch is bent toward the center of the fuel branch by the slope. Thus, the fuel injection angle can be made smaller than the opening angle α of the injection fuel passage, and thereby preventing the injection fuel from sticking to the intake pipe, which has occurred in the conventional fuel injection system, thereby improving the fuel combustion.
Emission and fuel efficiency can be improved.

また、燃料分岐部の分岐斜面の出口部に傾斜面を形成
したことにより、燃料分岐部の分岐斜面に沿って流れる
燃料の壁面流が傾斜面先端に液滴となって溜まりにく
く、これまた燃料の燃焼を良好とし、エミッション及び
燃費を改善するに有効である。この点について詳述する
と、燃料分岐部の分岐斜面の出口部に燃料噴射弁の中心
軸に対して平行な平行面を形成したもの(例えば実開昭
61-33966号公報における第5図参照)では、燃料分岐部
の分岐斜面と平行面との折れ曲がり具合がなだらかであ
るため、燃料の壁面流が平行面先端に液滴となって溜ま
りやすく、燃料の燃焼に悪影響を及ぼすおそれがある。
これに対し、本願考案のものでは、燃料分岐部の分岐斜
面と傾斜面との折れ曲がり具合が前記平行面に比べて大
きいため、燃料の壁面流が傾斜面先端に液滴となって溜
まりにくくなることから、前記平行面のものに生じた不
具合を改善することができる。
In addition, since the inclined surface is formed at the exit of the branch slope of the fuel branch portion, it is difficult for the wall flow of the fuel flowing along the branch slope of the fuel branch portion to accumulate as droplets at the tip of the slope. Is effective for improving combustion and improving emission and fuel efficiency. To explain this point in detail, a parallel surface parallel to the central axis of the fuel injection valve is formed at the outlet of the branch slope of the fuel branch (for example, the actual
In FIG. 5 of JP-A-61-33966), since the degree of bending between the diverging slope and the parallel surface of the fuel diverging portion is gentle, the wall flow of the fuel is liable to accumulate as droplets at the tip of the parallel surface. May have an adverse effect on the combustion of coal.
On the other hand, in the case of the present invention, since the degree of bending between the branch slope and the inclined surface of the fuel branch portion is larger than that of the parallel surface, the wall flow of the fuel becomes difficult to collect as droplets at the tip of the inclined surface. Therefore, it is possible to improve the problem that occurs in the parallel plane.

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

第1図は本考案の一実施例に係る電磁式燃料噴射弁の先
端部の縦断面図、第2図は第1図の右側面図、第3図は
第1図の電磁式燃料噴射弁の全体図、第4図は本考案の
電磁式燃料噴射弁と従来の電磁式燃料噴射弁との燃料噴
霧の噴射状態を示した説明図、第5図はエンジンの燃料
噴射装置の要部断面図、第6図は従来の電磁式燃料噴射
弁の先端部の縦断面図、第7図は第6図の右側面図であ
る。 11:燃料噴射弁 13:燃料噴射孔 18a、18b:噴射燃料通路 20:燃料分岐部 20a、20b:分岐斜面 21a、21b:通路軸線 23a、23b:傾斜面 α:通路軸線の開き角 CL:燃料分岐部の中心線 La,Lb:傾斜面の延長線
FIG. 1 is a longitudinal sectional view of a tip of an electromagnetic fuel injection valve according to an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is an electromagnetic fuel injection valve of FIG. FIG. 4 is an explanatory view showing an injection state of fuel spray between the electromagnetic fuel injection valve of the present invention and a conventional electromagnetic fuel injection valve, and FIG. 5 is a sectional view of a main part of a fuel injection device of an engine. FIG. 6 is a longitudinal sectional view of the tip of a conventional electromagnetic fuel injection valve, and FIG. 7 is a right side view of FIG. 11: fuel injection valve 13: fuel injection hole 18a, 18b: injection fuel passage 20: fuel branch portion 20a, 20b: branch slope 21a, 21b: passage axis 23a, 23b: slope α: opening angle of passage axis CL: fuel Center line of branch part La, Lb: Extension line of slope

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】燃料の計量を行う一つの燃料噴射孔の下流
に、該燃料噴射孔から噴射された噴射燃料を分流するた
めに、通路軸線が所定の開き角αをなすように燃料分岐
部によって分岐されかつその燃料分岐部による通路壁面
を分岐斜面とする噴射燃料通路を有する電磁式燃料噴射
弁において、前記燃料分岐部の分岐斜面の出口部には、
その下流側に延びる延長線が燃料分岐部の中心線と交差
するように傾斜させた傾斜面を形成したことを特徴とす
る電磁式燃料噴射弁。
1. A fuel branching section, in which a passage axis forms a predetermined opening angle α, downstream of one fuel injection hole for measuring fuel, in order to diverge fuel injected from the fuel injection hole. In an electromagnetic fuel injection valve having an injection fuel passage that is branched by and has a passage wall surface formed by the fuel branch portion as a branch slope, an outlet portion of the branch slope of the fuel branch portion includes:
An electromagnetic fuel injection valve, wherein an inclined surface is formed such that an extension line extending downstream thereof intersects a center line of a fuel branch portion.
JP1990075457U 1990-07-16 1990-07-16 Electromagnetic fuel injection valve Expired - Lifetime JP2528399Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990075457U JP2528399Y2 (en) 1990-07-16 1990-07-16 Electromagnetic fuel injection valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990075457U JP2528399Y2 (en) 1990-07-16 1990-07-16 Electromagnetic fuel injection valve

Publications (2)

Publication Number Publication Date
JPH0432257U JPH0432257U (en) 1992-03-16
JP2528399Y2 true JP2528399Y2 (en) 1997-03-12

Family

ID=31616052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990075457U Expired - Lifetime JP2528399Y2 (en) 1990-07-16 1990-07-16 Electromagnetic fuel injection valve

Country Status (1)

Country Link
JP (1) JP2528399Y2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6133966U (en) * 1984-07-31 1986-03-01 愛三工業株式会社 electromagnetic fuel injector
JPH0227177Y2 (en) * 1984-12-04 1990-07-23
JPS62131969A (en) * 1985-12-02 1987-06-15 Nippon Denso Co Ltd Fuel injection valve

Also Published As

Publication number Publication date
JPH0432257U (en) 1992-03-16

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