JPS62267565A - Structure of fuel injection valve - Google Patents
Structure of fuel injection valveInfo
- Publication number
- JPS62267565A JPS62267565A JP11080686A JP11080686A JPS62267565A JP S62267565 A JPS62267565 A JP S62267565A JP 11080686 A JP11080686 A JP 11080686A JP 11080686 A JP11080686 A JP 11080686A JP S62267565 A JPS62267565 A JP S62267565A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- fuel
- flow path
- injection valve
- fuel flow
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 65
- 238000002347 injection Methods 0.000 title claims abstract description 22
- 239000007924 injection Substances 0.000 title claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 230000007257 malfunction Effects 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野〕
本発明は、内燃機関の燃料供給装置に係り、特に燃料噴
射弁に好適な構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuel supply device for an internal combustion engine, and particularly to a structure suitable for a fuel injection valve.
（従来の技術）
従来の燃料噴射弁のフィルタ固定方法は、実公昭５９−
４１６７０号公報，特開昭５９−５１１５７号公報に記
載のように燃料流路を形成する部材に圧入されて固定さ
れろとなっていた。しかし、該フィルタの圧入時に発生
する異物に起因する燃料漏れ・動作不良の発生の防止と
いう点については、配慮されていなかった。(Prior art) The conventional method of fixing the filter of a fuel injection valve is
As described in Japanese Patent Laid-open No. 41670 and Japanese Patent Application Laid-Open No. 59-51157, it is press-fitted and fixed into a member forming a fuel flow path. However, no consideration has been given to preventing fuel leakage and malfunction caused by foreign matter generated when the filter is press-fitted.
上記従来技術は、燃料流路にフィルタ圧入時に発生する
異物の除去という点について配慮されておらず、該異物
に起因する燃料噴射弁のシート不良・ｌＪＩＪＪｆＦ不
良が発生するという問題があった。The above-mentioned conventional technology does not take into consideration the removal of foreign matter generated when the filter is press-fitted into the fuel flow path, and there is a problem in that seat defects and lJIJJfF defects of the fuel injection valve occur due to the foreign matter.
本発明の目的は、該燃料流路内に該フィルタ圧入時に発
生する異物に起因する該燃料噴射弁の不具合を防止する
ことにある。An object of the present invention is to prevent malfunctions of the fuel injection valve caused by foreign matter generated when the filter is press-fitted into the fuel flow path.
上記目的は、該フィルタを該燃料噴射弁本体に形成され
た燃料流路上流に該燃料流路形成域外に、パリ混入防止
用円周溝を具備したフィルタ固定部を形成し、該固定部
に該フィルタを緩圧人し、且つ，該フィルタ端面を燃料
配管で押すことで該燃料噴射弁が内燃機関に装着された
時の固定強度を確保する構造とすることにより達成され
る。The above object is to form a filter fixing part equipped with a circumferential groove for preventing paris contamination upstream of the fuel flow path formed in the fuel injection valve body and outside the fuel flow path formation area, and to attach the filter to the fuel injection valve body. This is achieved by applying a gentle pressure to the filter and pushing the end face of the filter with a fuel pipe to ensure fixing strength when the fuel injection valve is installed in an internal combustion engine.
［作用〕
該フィルタは、該燃料噴射弁本体に形成された燃料流路
上流に該燃料流路形成域外に形成した該□フィルタ固定
部に緩圧入される。その時１発生するパリは、該フィル
タ瀘網固定部と該フィルタ固定部に具備されたパリ混入
防止用溝で形成される空間中に包囲され、該燃料流路中
に流れ込むことはない。[Operation] The filter is gently press-fitted into the □ filter fixing portion formed upstream of the fuel flow path formed in the fuel injection valve body and outside the fuel flow path formation area. The particles generated at that time are surrounded by the space formed by the filter screen fixing part and the groove for preventing paris from entering the filter, and do not flow into the fuel flow path.
以下、本発明の一実施例を第１図、第２，３図を用いて
説明する。An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.
まず、第１図を用いて燃料噴射弁の構成及び動作原理に
ついて説明する。本燃料噴射弁１は、コイル３．コア４
．ヨーク５．プランジャ６、バルブガイド７、ニードル
８を主構成要素とする。該燃料噴射弁１は、図示しない
コントロールユニットからの０Ｎ−ＯＦＦ信号により、
シート部９の開閉を行うことで燃料噴射を行うものであ
り、該０Ｎ−ＯＦＦ信号は、コネクタ２を経由してコイ
ル３にパルスとして与えられる。該コイル３に電流が流
されると該コア４．該ヨーク５．該プランジヤ６で磁気
回路が形成され、該プランジャ６が図示上方へ吸引され
る。該プランジャ６は、該バルブガイド７内部に摺動自
在に具備された該ニードル８と結合されており、該プラ
ンジャ６が吸引力により移動することにより該シート部
９が開き。First, the configuration and operating principle of the fuel injection valve will be explained using FIG. This fuel injection valve 1 includes a coil 3. core 4
．． York 5. The main components are a plunger 6, a valve guide 7, and a needle 8. The fuel injection valve 1 is activated by an ON-OFF signal from a control unit (not shown).
Fuel injection is performed by opening and closing the seat portion 9, and the ON-OFF signal is given as a pulse to the coil 3 via the connector 2. When a current is passed through the coil 3, the core 4. The yoke5. A magnetic circuit is formed by the plunger 6, and the plunger 6 is attracted upward in the drawing. The plunger 6 is coupled to the needle 8 which is slidably provided inside the valve guide 7, and the seat portion 9 opens when the plunger 6 is moved by suction force.
燃料が噴射される。燃料は、図示しない燃料ポンプ、燃
圧レギュレータで加圧調圧され、該コア４に圧入固定さ
れたフィルタ１３を経て、該燃料噴射弁１内に形成され
た燃料流路１１に流入し、該コア４内部に具備したアジ
ャスタ１０内部、スプリング１２．該プランジャ６内・
外周、該ニードル８と該バルブガイド７で形成される隙
間を経て該シート部９へ供給される。Fuel is injected. The fuel is pressurized and regulated by a fuel pump and a fuel pressure regulator (not shown), passes through a filter 13 that is press-fitted into the core 4, flows into the fuel flow path 11 formed in the fuel injection valve 1, and flows into the core 4. 4. Adjuster 10 provided inside, spring 12. Inside the plunger 6
It is supplied to the seat portion 9 through the outer periphery, a gap formed by the needle 8 and the valve guide 7.
次に、第２図、第３図を用いて本考案の実施例について
説明する。図中、矢印は燃料の流れの方向を示す。第２
図は、従来のフィルタ固定方法を示すもので該コア４端
部に形成される該燃料流路〕１．内に該フィルタ１３の
ボディ１９を圧入することで固定している。第３図に本
考案の実施例を示す。該コア４は、該コア４端部に形成
される該燃料流路１１のさらに上流側にフィルタ固定部
１６を具備し、且つ、該フィルタ固定部１６と該燃料流
路】コ−の間に介在する段部に円周上にパリ混入防止用
Ｉ＃１７を具備する。該フィルタ２０の装着時には、従
来よりも該フィルタボディ２１と該フィルタ固定部１６
の圧入代を小さくした緩圧入とし、装着時に該コア４内
部にに発生する異物。Next, an embodiment of the present invention will be described using FIGS. 2 and 3. In the figure, arrows indicate the direction of fuel flow. Second
The figure shows a conventional filter fixing method, and shows the fuel flow path formed at the end of the core 4]1. The body 19 of the filter 13 is fixed by being press-fitted therein. FIG. 3 shows an embodiment of the present invention. The core 4 is provided with a filter fixing portion 16 further upstream of the fuel flow path 11 formed at the end of the core 4, and a filter fixing portion 16 is provided between the filter fixing portion 16 and the fuel flow path. The intervening stepped portion is provided with I#17 on the circumference to prevent paris from being mixed in. When the filter 20 is installed, the filter body 21 and the filter fixing part 16 are separated from each other more than before.
It is a gentle press-fit with a small press-fit allowance, and foreign matter is generated inside the core 4 during installation.
特にパリの量を少なくする。緩圧入のために発生したパ
リ等の異物は、該パリ混入防止用円周溝１７と該フィル
タボディ２１で形成される空間に包囲され、該フィルタ
ボディ２１と該コア４の段部が接触しているために該燃
料流路１１内へ混入することはない。さらに、実車振動
及び燃料・雰囲気温度交番による該フィルタ２０の抜は
防止。Especially reduce the amount of Paris. Foreign matter such as particles generated due to gentle press-fitting is surrounded by the space formed by the circumferential groove for preventing intrusion of particles 17 and the filter body 21, and the filter body 21 and the stepped portion of the core 4 are in contact with each other. Therefore, it does not mix into the fuel flow path 11. Furthermore, the filter 20 is prevented from being removed due to actual vehicle vibration and fuel/atmosphere temperature alternation.
及び該燃料流路１１内への異物の混入を部上するために
、燃料配管１８で該フィルタ２０の端面を押さえる構造
とした。In order to prevent foreign matter from entering the fuel flow path 11, the end face of the filter 20 is held down by the fuel pipe 18.
本実施例によれば、該フィルタ２０装着時に該燃料流路
１１側に発生する異物の減少及び該燃料流路１１内への
混入の防止に有効で、該異物による燃料漏れ・動作不良
の防止に効果がある。According to this embodiment, when the filter 20 is installed, it is effective to reduce the foreign matter generated on the fuel flow path 11 side and to prevent the foreign matter from entering the fuel flow path 11, and to prevent fuel leakage and malfunction due to the foreign matter. is effective.
第４図は１本考案の他の実施例であり、該コア４端部外
周にパリ混入防止のための段部２２を具備し、該段部２
２を含むフィルタ固定部１６に該フィルタボディ２１を
緩圧入するものであり、該燃料流路１１と該フィルタ固
定部１６が完全に分離した構造としたものである。FIG. 4 shows another embodiment of the present invention, in which a stepped portion 22 is provided on the outer periphery of the end portion of the core 4 to prevent contamination of paris.
The filter body 21 is gently press-fitted into the filter fixing part 16 including the fuel passage 11 and the filter fixing part 16, and the fuel passage 11 and the filter fixing part 16 are completely separated from each other.
本発明によれば、燃料噴射弁へのフィルタ装着時に燃料
噴射弁内に形成された燃料流路内に発生する異物の該燃
料流路への混入を防止できるので該異物に起因する燃料
漏れ・動作不良の防止の効果がある。According to the present invention, it is possible to prevent foreign matter generated in the fuel flow path formed in the fuel injection valve from entering the fuel flow path when a filter is attached to the fuel injection valve. This has the effect of preventing malfunctions.
第１図は、燃料噴射弁の構造図、第２図は、従来のフィ
ルタ固定部断面図、第３図は、本発明の実施例のフィル
タ固定部断面図、第４図は１本発明の他の実施例のフィ
ルタ固定部断面図である。Fig. 1 is a structural diagram of a fuel injection valve, Fig. 2 is a sectional view of a conventional filter fixing part, Fig. 3 is a sectional view of a filter fixing part of an embodiment of the present invention, and Fig. 4 is a sectional view of a conventional filter fixing part. FIG. 7 is a sectional view of a filter fixing part of another embodiment.
Claims (1)
された燃料流路上流に燃料を濾過するためのフイルタを
具備した燃料噴射弁において、該フイルタの固定部分を
該燃料流路に設けないことを特徴とする燃料噴射弁の構
造。1. In a fuel supply device for an internal combustion engine, in a fuel injection valve equipped with a filter for filtering fuel upstream of a fuel flow path formed in a fuel injection valve body, a fixed part of the filter is not provided in the fuel flow path. A fuel injection valve structure featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11080686A JPS62267565A (en) | 1986-05-16 | 1986-05-16 | Structure of fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11080686A JPS62267565A (en) | 1986-05-16 | 1986-05-16 | Structure of fuel injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62267565A true JPS62267565A (en) | 1987-11-20 |
Family
ID=14545127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11080686A Pending JPS62267565A (en) | 1986-05-16 | 1986-05-16 | Structure of fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62267565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007500301A (en) * | 2003-07-30 | 2007-01-11 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Fuel injection valve and method of attaching fuel injection valve |
-
1986
- 1986-05-16 JP JP11080686A patent/JPS62267565A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007500301A (en) * | 2003-07-30 | 2007-01-11 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Fuel injection valve and method of attaching fuel injection valve |
| US7770812B2 (en) | 2003-07-30 | 2010-08-10 | Robert Bosch Gmbh | Fuel injector and method for its installation |
| JP4709753B2 (en) * | 2003-07-30 | 2011-06-22 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Fuel injection valve and method of attaching fuel injection valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7070127B2 (en) | Fuel injection valve with a filter bush | |
| EP0753104B1 (en) | Egr system having fast-acting egr valve | |
| US6036120A (en) | Fuel injector and method | |
| WO1994025748A1 (en) | Filter cartridge mounting for a top-feed fuel injector | |
| US6253789B1 (en) | Valve for metered introduction of volatilized fuel | |
| JPH02221649A (en) | Fuel injection device | |
| US7059548B2 (en) | Fuel injection valve with a damping element | |
| JPS61201879A (en) | Fuel jet valve of electromagnetic operation system | |
| US6446885B1 (en) | Secondary filter assembly for fuel injector | |
| JP2004521252A (en) | Fuel injection valve | |
| JP4080329B2 (en) | Fuel injection valve | |
| JP2757220B2 (en) | Fuel injection device | |
| US5197428A (en) | Fuel injector surrounding intake valve stem | |
| JPS61104156A (en) | Electromagnetic type fuel injection valve | |
| JPS62267565A (en) | Structure of fuel injection valve | |
| US6983900B2 (en) | Fuel injector | |
| JP2004509286A (en) | Fuel injection valve | |
| US6764027B2 (en) | Fuel injection valve | |
| JPS61255263A (en) | Electromagnetic fuel injection valve | |
| US6921036B2 (en) | Fuel injection valve | |
| JPS61108866A (en) | Electromagnet type fuel injection device | |
| JPH01104960A (en) | Adjustment of injection quantity of electromagnetic type fuel injection valve | |
| JPH02190684A (en) | Solenoid valve, especially fuel injection valve for fuel injector | |
| JP4126716B2 (en) | Manufacturing method of fuel injection device | |
| JP4123323B2 (en) | Fuel injection valve |