JPS6196172A - Electromagnetic operation type fuel injection valve - Google Patents
Electromagnetic operation type fuel injection valveInfo
- Publication number
- JPS6196172A JPS6196172A JP22288885A JP22288885A JPS6196172A JP S6196172 A JPS6196172 A JP S6196172A JP 22288885 A JP22288885 A JP 22288885A JP 22288885 A JP22288885 A JP 22288885A JP S6196172 A JPS6196172 A JP S6196172A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fuel injection
- injection valve
- valve needle
- hardened
- 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
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
- F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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噴射装置のための電磁操作式燃
料噴射弁であって、弁ケーシングと、該弁ケーシングに
固定されたノズル体と、弁ケーシングの内部に配置され
定置の界磁巻線を保軸
持する軟鉄コアと、該コアに対して同〜的にかつ空気ギ
ャップを形成しつつ向い合う可動子とを有し、この可動
子がノズル体の孔内で案内された弁ニードルの、噴射側
と反対側の端部と結合されている形式のものに関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electromagnetically operated fuel injection valve for a fuel injection device of an internal combustion engine, which comprises a valve casing, a nozzle body fixed to the valve casing, and a valve casing. It has a soft iron core that is placed inside the casing and supports a stationary field winding, and a movable element that faces the core in the same way and forms an air gap. It relates to a valve needle which is connected to the end opposite the injection side of the valve needle guided in the bore of the nozzle body.
従来の技術
上記形式を有する公知の燃料噴射弁においては弁ニード
ルと可動子とが別個の部材として製造され、その後で１
つの構成部材に相互結合される。この場合、可動子は軟
鉄製の構成部材でありまた弁ニードルには耐摩耗性の材
料が用いられている。2. Prior Art In known fuel injection valves of the type described above, the valve needle and armature are manufactured as separate parts, which are then assembled into one
interconnected into one component. In this case, the armature is a component made of soft iron and the valve needle is made of a wear-resistant material.
この別個に製造され続いて組合わされる各単一部材にお
ける製造誤差に基づく寸法の狂いを小さなものに抑える
ためには、この可動子と弁ニードルとから成る構成部材
の製造時に多くの経費と綿密な注意を払う必要がある。In order to minimize dimensional deviations due to manufacturing errors in each single component that is manufactured separately and subsequently assembled, a great deal of expense and care must be taken during the manufacturing of the component consisting of the mover and valve needle. It is necessary to pay careful attention.
発明の課題
従って本発明の課題は冒頭に述べた形式の燃料噴射弁に
おいて、高い寸法精確度を有しかつ単純で経済的な方法
を以って製造可能なものを提供することである。OBJECTS OF THE INVENTION It is therefore an object of the invention to provide a fuel injection valve of the type mentioned at the outset, which has a high dimensional accuracy and can be manufactured in a simple and economical manner.
課題を解決するだめの手段
上記の課題は本発明によれば、可動子と弁ニードルとが
１部から成る閉鎖部材であって、その可動子の範囲が軟
化焼なまし処理され、弁ニードルの範囲が少なくとも部
分的に焼入れ処理されていることによって解決された。Means for Solving the Problem According to the invention, the above-mentioned object is achieved by providing a closing member in which the armature and the valve needle are in one part, the region of the armature being subjected to a softening annealing treatment, and the valve needle being softened and annealed. The solution is that the range is at least partially hardened.
実施態様
本発明の有利な１実施゛態様によれば、前記閉鎖部材の
完全焼入れ処理の後に可動子の範囲が軟化焼なまし処理
されてもよい。Embodiment According to an advantageous embodiment of the invention, after the complete hardening of the closing part, the region of the armature may be subjected to a softening annealing.
また別の実施態様によれば、前記閉鎖部材の完全な軟化
焼なましの処理後に弁ニードルの範囲が少なくとも部分
的に表面焼入れ処理されていると有利である。According to a further embodiment, it is advantageous if, after the complete softening annealing of the closure element, the area of the valve needle is at least partially surface hardened.
この際の表面焼入れ処理は、例えば誘導加熱式焼入れ又
はレーず光線式焼入れ等の簡単な方法で可能である。The surface hardening treatment at this time can be performed by a simple method such as induction heating hardening or laser beam hardening.
また焼入れが弁ニードルの表面全体にではなく、摩擦又
は当付けによる摩耗にさらされる部分のみに必要とされ
るので、本発明の１実施態様によれば、弁ニードルの円
筒状の外套面に半径方向突出した案内付加部が配設され
ており、この案内付加部がノズル体の孔の壁部に滑り可
能に接触しており、この際に案内付加部の、前記壁部へ
の接触面が面焼入れ処理されていてもよい。Also, since hardening is not required over the entire surface of the valve needle, but only on those parts exposed to friction or abutment wear, one embodiment of the invention provides a radius A directionally protruding guide extension is provided, which guide extension is in slidable contact with the wall of the hole of the nozzle body, with the contact surface of the guide extension with the wall being It may be surface hardened.
また同じ理由から別の有利な実施態様によれば、弁ニー
ドルの噴射側端部が、表面を焼入れ処理された弁閉鎖部
材として形成され、更にこの際に該弁閉鎖部材の、弁座
に接触する面のみでなく、場合によっては燃料噴射弁の
出口孔を介して貫通突出しているぎンも焼入れ処理する
とよい。これによって燃料流による当該のビンの摩耗が
回避される。For the same reason, a further advantageous embodiment provides that the injection-side end of the valve needle is designed as a valve closing element with a hardened surface, and in this case also comes into contact with the valve seat of the valve closing element. In some cases, it is preferable to harden not only the surface of the fuel injection valve but also the hole that protrudes through the outlet hole of the fuel injection valve. This avoids wear of the bottle in question due to the fuel flow.
更に本発明の有利な実施態様によれば、弁ニードルが行
程制限ストッパを有し、燃料噴射弁の開放行程において
その制限のために前記行程制限ストッパが弁ケーシング
のストッパに当付けられ、この際に行程制限ストッパの
、弁ケーシングのストッパへ当付けられるべきストッパ
面の表面が焼入れ処理されているとよく、これによって
行程制限ストッパにおける摩耗も十分に回避され得る。According to a further advantageous embodiment of the invention, the valve needle has a stroke-limiting stop, which stroke-limiting stop rests against a stop on the valve housing for limiting the opening stroke of the fuel injector; In addition, it is preferable that the surface of the stopper surface of the stroke limiting stopper that is to be brought into contact with the stopper of the valve casing is hardened, so that wear on the stroke limiting stopper can be sufficiently avoided.
実施例
図示の本発明による燃料噴射弁が有する弁ケーシング１
内には、界磁巻線３を有する巻体２が配置されている。Valve casing 1 included in the fuel injection valve according to the present invention illustrated in the drawings
A winding 2 with a field winding 3 is arranged therein.
この巻体２内に、貫通孔５を備えた軟鉄コア４が貫通配
置されており、この軟鉄コア４の、弁ケーシング１から
突出した端部には入口管片６が形成されている。A soft iron core 4 with a through hole 5 is arranged through the winding body 2 , and an inlet tube 6 is formed at the end of the soft iron core 4 that projects from the valve housing 1 .
軟鉄コア４の他方端面は空気ギャップを形成しつつ可動
子７に対して向い合っており、またこの可動子７の、軟
鉄コア４と反対側の面には同軸的に延びる弁ニードル８
が配設されている。The other end face of the soft iron core 4 faces the mover 7 while forming an air gap, and a valve needle 8 coaxially extends on the face of the mover 7 opposite to the soft iron core 4.
is installed.
可動子７と弁ニードル８とは一部分から成る閉鎖部材と
して形成されている。The armature 7 and the valve needle 8 are designed as a one-piece closure.
弁ニードルＢは、弁ケーシング１に同軸的に結合された
ノズル体１０の孔９内に突入している。The valve needle B projects into a bore 9 of a nozzle body 10 which is coaxially connected to the valve housing 1 .
弁ニードル８の自由端部は弁閉鎖部材１１として形成さ
れており、この部材１１ばその円錐状の閉鎖面１９を以
って、孔９の開口部に形成された弁座１２の対応する面
上に載着可能であり延いては弁通路を遮閉可能である。The free end of the valve needle 8 is designed as a valve closing element 11 , which with its conical closing surface 19 closes the corresponding surface of the valve seat 12 formed at the opening of the bore 9 . It can be placed on top and thus close off the valve passage.
孔９の、弁出口を形成する開口部内には、弁ニーＶル８
の自由端部に形成されたピン１３が突入している。弁ニ
ードル８はある所定の値だけ孔９内で軸線方向摺動可能
である。この際に閉じ方向での摺動量は弁座１２への弁
閉鎖部材１１の当接によって制限され、また開き方向で
の摺動量は弁ニードル８に一体成形された行程制限スト
ッパ１４が弁ケーシング１に固定結合されたストッパ１
５に当接することによって制限される。In the opening of the hole 9, which forms the valve outlet, there is a valve knee Vle 8.
A pin 13 formed in the free end of is protruding. The valve needle 8 is axially slidable within the bore 9 by a certain predetermined value. At this time, the amount of sliding in the closing direction is limited by the contact of the valve closing member 11 with the valve seat 12, and the amount of sliding in the opening direction is limited by the stroke limiting stopper 14 integrally molded on the valve needle 8. Stopper 1 fixedly connected to
5.
プレロードをかけられて軟鉄コア４に支持されている圧
縮ばね１６によって、可動子７及び該可動子７と共に弁
ニードル８が閉じ方向で負荷されている。By means of a compression spring 16 which is prestressed and supported on the soft iron core 4, the armature 7 and the valve needle 8 together with it are loaded in the closing direction.
弁ニードル８は孔９よりも小さな直径を有している。従
って弁ニードル８の案内のために、該弁ニードル８の円
筒状の外套壁に半径方向突出した案内付加部１７が配置
されており、この付加部１７が孔９の壁に接触せしめら
れている。Valve needle 8 has a smaller diameter than bore 9. For guiding the valve needle 8, therefore, a radially projecting guide extension 17 is arranged on the cylindrical jacket wall of the valve needle 8, which extension 17 rests against the wall of the bore 9. .
可動子７と弁ニードル８とから成り一体的に形成された
構成部材はまず軟化焼なまし処理され、続いて案内付加
部１７の、孔９の壁に対する接触面１８と、弁閉鎖部材
１１の閉鎖面１９と、ピン１３と、行程制限ストッパ１
４の、ストッパ１５に対するストッパ面２０との各表面
が焼入れ処理される。The integrally formed component consisting of the armature 7 and the valve needle 8 is first subjected to a softening annealing treatment, and then the contact surface 18 of the guide extension 17 against the wall of the bore 9 and the valve closing member 11 are tempered. Closing surface 19, pin 13, and stroke limit stop 1
4, each surface of the stopper surface 20 relative to the stopper 15 is hardened.
別の実施例ではまず閉鎖部材全体が焼入れされ、続いて
可動子７が軟化焼なまし処理されてもよい。In another embodiment, the entire closure member may first be hardened, and then the armature 7 may be subjected to a softening annealing treatment.
発明の効果
本発明によればその１部分から成る構成によって、従来
は可動子と弁ニードルとの相互結合範囲内に生じていた
全ての寸法誤差による狂いが除去されている。またこれ
らの部材を相互結合するだめの作業工程も不要となる。Effects of the Invention Due to the one-part design of the invention, all dimensional deviations that hitherto occurred within the interconnection region of armature and valve needle are eliminated. Further, there is no need for additional work steps for interconnecting these members.
軟化焼なまし処理によって可動子の、電磁弁作動のため
に必要な材料特性が形成され、同時に弁ニードルの焼入
れ処理によってそこに必要とされる耐摩耗性が維持形成
され得る。The softening annealing process creates the material properties of the armature required for the solenoid valve operation, and at the same time the hardening process of the valve needle maintains the required wear resistance therein.
図面は本発明による燃料噴射弁を示す断面図である。 The drawing is a sectional view showing a fuel injection valve according to the present invention.
Claims (6)
噴射弁であって、弁ケーシングと、該弁ケーシングに固
定されたノズル体と、弁ケーシングの内部に配置され定
置の界磁巻線を保持する軟鉄コアと、該コアに対して同
軸的にかつ空気ギャップを形成しつつ向い合う可動子と
を有し、この可動子がノズル体の孔内で案内された弁ニ
ードルの、噴射側と反対側の端部と結合されている形式
のものにおいて、可動子（７）と弁ニードル（８）とが
１部から成る閉鎖部材であって、その可動子（７）の範
囲が軟化焼なまし処理され、弁ニードル（８）の範囲が
少なくとも部分的に焼入れ処理されていることを特徴と
する、電磁操作式の燃料噴射弁。1. An electromagnetically operated fuel injection valve for a fuel injection device of an internal combustion engine, comprising a valve casing, a nozzle body fixed to the valve casing, and a stationary field winding disposed inside the valve casing. A side of a valve needle opposite to the injection side, which has a soft iron core and a movable element facing the core coaxially and with an air gap, the movable element being guided in a hole in a nozzle body. of the type in which the armature (7) and the valve needle (8) are a one-part closure member, the region of the armature (7) being subjected to a softening annealing treatment. An electromagnetically operated fuel injection valve, characterized in that the region of the valve needle (8) is at least partially hardened.
７）の範囲が軟化焼なまし処理されている、特許請求の
範囲第１項記載の燃料噴射弁。2. After complete hardening of the closing member, the mover (
7) The fuel injection valve according to claim 1, wherein the range of 7) is subjected to a softening annealing treatment.
弁ニードル（８）の範囲が少なくとも部分的に表面焼入
れ処理されている、特許請求の範囲第１項記載の燃料噴
射弁。3. After a complete softening annealing treatment of the closure member,
2. The fuel injection valve according to claim 1, wherein the region of the valve needle (8) is at least partially surface hardened.
出した案内付加部（１７）が配設されており、この案内
付加部（１７）がノズル体（１０）の孔（９）の壁部に
滑り可能に接触しており、この際に案内付加部（１７）
の、前記壁部への接触面（１８）が表面焼入れ処理され
ている、特許請求の範囲第３項記載の燃料噴射弁。4. A radially projecting guide addition (17) is arranged on the cylindrical jacket surface of the valve needle (8), and this guide addition (17) is connected to the wall of the hole (9) of the nozzle body (10). At this time, the guide addition part (17)
4. The fuel injection valve according to claim 3, wherein the contact surface (18) to the wall portion is surface hardened.
処理された弁閉鎖部材（１１）として形成されている、
特許請求の範囲第３項記載の燃料噴射弁。5. The injection end of the valve needle (8) is formed as a valve closing member (11) whose surface is hardened.
A fuel injection valve according to claim 3.
有し、燃料噴射弁の開放行程においてその制限のために
前記行程制限ストッパ（１４）が弁ケーシング（１）の
ストッパ（１５）に当付けられ、この際に行程制限スト
ッパ（１４）の、弁ケーシング（１）のストッパ（１５
）へ当付けられるべきストッパ面（２０）の表面が焼入
れ処理されている、特許請求の範囲第３項記載の燃料噴
射弁。6. The valve needle (8) has a stroke-limiting stop (14), said stroke-limiting stop (14) resting against a stop (15) of the valve casing (1) for its limitation during the opening stroke of the fuel injection valve. , at this time, the stroke limiting stopper (14) and the stopper (15) of the valve casing (1)
4. The fuel injection valve according to claim 3, wherein the surface of the stopper surface (20) that is to be brought into contact with the fuel injection valve (20) is hardened.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3437162.1 | 1984-10-10 | ||
| DE19843437162 DE3437162A1 (en) | 1984-10-10 | 1984-10-10 | ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6196172A true JPS6196172A (en) | 1986-05-14 |
Family
ID=6247562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22288885A Pending JPS6196172A (en) | 1984-10-10 | 1985-10-08 | Electromagnetic operation type fuel injection valve |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0177719A1 (en) |
| JP (1) | JPS6196172A (en) |
| DE (1) | DE3437162A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR880005354A (en) * | 1986-10-08 | 1988-06-28 | 나까무라 겐조 | Electronic actuator |
| JP2708470B2 (en) * | 1988-06-08 | 1998-02-04 | 株式会社日立製作所 | Electromagnetic fuel injection valve |
| DE3905992A1 (en) * | 1989-02-25 | 1989-09-21 | Mesenich Gerhard | ELECTROMAGNETIC HIGH PRESSURE INJECTION VALVE |
| JPH10220319A (en) * | 1997-02-06 | 1998-08-18 | Denso Corp | Fuel injection valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1911827A1 (en) * | 1969-03-08 | 1970-09-17 | Bosch Gmbh Robert | magnetic valve |
| US4231525A (en) * | 1979-05-10 | 1980-11-04 | General Motors Corporation | Electromagnetic fuel injector with selectively hardened armature |
| DE2932433A1 (en) * | 1979-08-10 | 1981-02-26 | Bosch Gmbh Robert | Fuel injection needle valve - has needle in titanium or titanium alloy, heat treated in salt bath for improved wear resistance |
| DE3301501A1 (en) * | 1982-01-28 | 1983-08-04 | General Motors Corp., Detroit, Mich. | Electromagnetic fuel injection device |
-
1984
- 1984-10-10 DE DE19843437162 patent/DE3437162A1/en not_active Withdrawn
-
1985
- 1985-08-20 EP EP85110401A patent/EP0177719A1/en not_active Ceased
- 1985-10-08 JP JP22288885A patent/JPS6196172A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0177719A1 (en) | 1986-04-16 |
| DE3437162A1 (en) | 1986-04-17 |
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