JPS63239358A - Electromagnetic fuel injection valve - Google Patents
Electromagnetic fuel injection valveInfo
- Publication number
- JPS63239358A JPS63239358A JP1071988A JP1071988A JPS63239358A JP S63239358 A JPS63239358 A JP S63239358A JP 1071988 A JP1071988 A JP 1071988A JP 1071988 A JP1071988 A JP 1071988A JP S63239358 A JPS63239358 A JP S63239358A
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- guide ring
- iron core
- guide
- 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.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 239000000446 fuel Substances 0.000 title claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000696 magnetic material Substances 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 2
- 241001247986 Calotropis procera Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、Ｗ１電磁燃料噴射弁にかかり、特に自動車用
内燃機関の燃料噴射装置に好適な電磁式燃料噴射弁に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a W1 electromagnetic fuel injection valve, and particularly to an electromagnetic fuel injection valve suitable for a fuel injection device for an internal combustion engine for an automobile.
（従来の技術〕
従来の電磁式燃料噴射弁は特公昭５６−１１０’７１号
公報等で知られ、る様に、一端に弁体が、他端に磁性材
性のアーマチュアが取付けられた可動子を備えている。(Prior Art) A conventional electromagnetic fuel injection valve is known from Japanese Patent Publication No. 56-110'71, etc., and is a movable type fuel injection valve with a valve body attached to one end and a magnetic armature attached to the other end. Have a child.
この可動子を噴射弁の軸心に沿って真直ぐに進退させる
為、可動子の弁体とアーマチュアとを連絡するプランジ
ャには弁体寄りに一つとアーマチュア寄りに一つ、都合
２カ所にガイドを設けている。In order to move this mover forward and backward straight along the axis of the injection valve, the plunger that connects the valve body of the mover and the armature has two guides, one near the valve body and one near the armature. It is set up.
上記従来の技術は２つのガイド間の距離を十分に確保で
きず、２点支持にするにもかかわらず弁体をバルブの軸
心に正確に保持できないという問題があった。The conventional technique described above has the problem that a sufficient distance between the two guides cannot be ensured, and the valve body cannot be accurately held at the axis of the valve even though it is supported at two points.
本発明の目的は上記課題を解消し、ガイド部間の距離を
バルブの全長を長くすることな〈従来より長くできる様
にして、弁体をバルブの軸心に正確に保持することので
きる電磁式燃料噴射弁を提供することにある。The purpose of the present invention is to solve the above-mentioned problems, and to provide an electromagnetic device that can make the distance between the guide parts longer than before without increasing the overall length of the valve, and that can accurately hold the valve body in the axis of the valve. The purpose of the present invention is to provide a type fuel injection valve.
上記目的は、アーマチュア寄りのガイド部をアーマチュ
アとコアとの間に介在させた非磁性材性の摺動部材によ
ってアーマチュアをコアにガイドさせる様に構成するこ
とによって達成される。The above object is achieved by configuring the armature to be guided to the core by a sliding member made of a non-magnetic material and interposed between the armature and the core.
また、上記目的は、アーマチュアとコアとを同軸状態に
保持する保持部材を非磁性材で形成してこの保持部材を
ガイドとして利用することによっても達成できる。Furthermore, the above object can also be achieved by forming a holding member that holds the armature and core in a coaxial state from a non-magnetic material and using this holding member as a guide.
上記の如く構成された本発明の電磁式燃料噴射弁は、可
動子の端部のアーマチュア自身をコアでガイドすること
になるのでバルブ全体の長さを従来と同じ長さにした場
合弁体寄りに形成された一方のガイド部との間の寸法が
十分に長く確保できる。In the electromagnetic fuel injection valve of the present invention configured as described above, the armature itself at the end of the mover is guided by the core, so if the overall length of the valve is the same as the conventional one, the valve body will be closer to the valve body. A sufficiently long dimension can be ensured between the two guide portions and one of the guide portions formed in the first and second guide portions.
その結果可動子の軸心がバルブの軸心に対して正確に一
致した状態で可動子を軸方向に進退させることが可能と
なり、弁体と弁座の片当りや噴射量の特性の再現性が失
なわれるといった従来の問題を排除できる。As a result, it is possible to move the mover forward and backward in the axial direction with the axis of the mover precisely aligned with the axis of the valve, and the uneven contact between the valve body and valve seat and the reproducibility of the injection quantity characteristics are improved. This eliminates the traditional problem of data being lost.
第１図において、中心に燃料通路１ａを形成した固定鉄
心１は、中間外周につば部１ｂを一体に形成し、該つば
部１ｂの外周上部には環状の結合溝１ｃが形成されてい
る。In FIG. 1, a fixed iron core 1 having a fuel passage 1a formed in the center has a flange 1b integrally formed on the intermediate outer periphery, and an annular coupling groove 1c is formed at the upper outer periphery of the flange 1b.
上記結合溝１ｃは図から判るように断面Ｗ字状の凹凸と
なって、そこに外周に位置する筒状のヨーク２の内周部
の一部が局部的に塑性変形されて結合されている。As can be seen from the figure, the coupling groove 1c is uneven with a W-shaped cross section, and a part of the inner circumference of the cylindrical yoke 2 located on the outer circumference is locally plastically deformed and coupled thereto. .
前記固定鉄心１の外周とヨーク２の内周面間には、環状
の励磁コイル１４を巻線した合成樹脂からなる絶縁ボビ
ン１３がＯリングＯｆ ＋ ０２を介して支持固定され
ている。Between the outer periphery of the fixed iron core 1 and the inner periphery of the yoke 2, an insulating bobbin 13 made of synthetic resin and having an annular excitation coil 14 wound thereon is supported and fixed via an O-ring Of+02.
一方前記固定鉄心１の中心には円筒のアジヤスティング
スリーブ１２が固定鉄心１の外周からの加締力により加
締固定されている。On the other hand, a cylindrical adjusting sleeve 12 is crimped and fixed to the center of the fixed iron core 1 by a crimping force applied from the outer periphery of the fixed iron core 1.
前記固定鉄心１の下方先端に配置されるボールバルブ３
は１円筒状のプランジャロッド４の先端に保持され、該
ロッド４は前記固定鉄心１と軸方向に隙間を持って対向
する筒状プランジャ５の内周と圧入により結合されてい
る。６は非磁性体からなるガイドリングで一端外周がプ
ランジャ５と圧入等により結合され、他端外周が前記固
定鉄心の内周にスライド自在に配置されている。Ball valve 3 disposed at the lower tip of the fixed iron core 1
is held at the tip of a cylindrical plunger rod 4, which is press-fitted to the inner periphery of a cylindrical plunger 5 that faces the fixed iron core 1 with a gap in the axial direction. Reference numeral 6 denotes a guide ring made of a non-magnetic material. One end of the outer periphery is connected to the plunger 5 by press fitting or the like, and the other end of the outer periphery is slidably arranged on the inner periphery of the fixed iron core.
１１は前記ガイドリング６の内径部に配置され。11 is disposed on the inner diameter portion of the guide ring 6.
かつ端部をそれぞれプランジャロッド４とアジヤスティ
ングスリーブ１２に係止された膨張形スプリングで、ボ
ールバルブ３を常に閉じる方向に押圧している。The ball valve 3 is constantly pressed in the closing direction by an expansion spring whose end portions are respectively engaged with the plunger rod 4 and the adjusting sleeve 12.
燃料噴射ロアａを有するノズル７はバルブガイド９に同
心的に配置され、かつ外周縁部の材料を局部的にバルブ
ガイド内周部に形成された環状溝９ａに塑性変形させる
ことにより結合固定されている。The nozzle 7 having the fuel injection lower part a is arranged concentrically with the valve guide 9, and is fixedly connected by plastically deforming the material of the outer peripheral edge locally into an annular groove 9a formed in the inner peripheral part of the valve guide. ing.
前記バルブガイド９は、前記ヨーク２の下端面に形成さ
れた円筒状のくぼみ２ａにＣ形ワッシャ１０を介して配
置され、前記ボールバルブ３を保持している。そしてヨ
ーク２への固定は前記同様ヨーク２の外周縁部の材料を
バルブガイド９の外周に形成された環状ｓ９ａに局部的
に塑性変形させることにより結合固定される。The valve guide 9 is disposed in a cylindrical recess 2a formed in the lower end surface of the yoke 2 via a C-shaped washer 10, and holds the ball valve 3. As described above, the valve guide 2 is fixed to the yoke 2 by locally plastically deforming the material of the outer peripheral edge of the yoke 2 to the annular shape s9a formed on the outer periphery of the valve guide 9.
前記固定鉄心１及びヨーク２の上部を被うプラスチック
ジャケット１５Ａはモールド成形され、一端にリード線
ターミナルプラグ１５ａを形成し、かつ上部はゴムブツ
シュ１５Ｂにより保持されている。A plastic jacket 15A covering the fixed core 1 and the upper part of the yoke 2 is molded, and has a lead wire terminal plug 15a formed at one end, and the upper part is held by a rubber bush 15B.
なお、１５Ｃは燃料通路に保持される金属フィルターで
ある。Note that 15C is a metal filter held in the fuel passage.
上記構成において、その組立方法は、まず第２図に示す
ようにヨーク２の内径を案内するセンターガイド１７に
ヨーク２をセットして動かないように固定すると共にヨ
ークの外周を下ダイ２１に固定した外ガイド１８で保持
する。そしてその後励磁コイル１４を絶縁ボビン１３と
共に前記ガイド１７に挿入配置する。In the above configuration, the assembly method is as shown in FIG. It is held by the outer guide 18. Then, the excitation coil 14 and the insulating bobbin 13 are inserted into the guide 17.
その後固定鉄心１をヨーク２に嵌合させるとともに前記
ガイド１７に内径を案内させ、同軸上にセットする。そ
してプレスラム２２に固定プレート２０を介してセット
されたパンチ１６をヨーク２の内径に案内しながら下降
させ、先端の環状の加工歯により、結合部の近傍部に当
る内径縁部を局部的に垂直に押圧する。すると予め固定
鉄心１の外周結合面に形成された結合溝部に固定鉄心の
材料の一部は抑圧方向と直角に塑性流動され１両者間を
塑性変形結合させる。結合後、前記プレスラム２２とパ
ンチ１６を上昇させ、ノックアウトピン２３を作動させ
て組付けられた前記製品を排出する。Thereafter, the fixed iron core 1 is fitted into the yoke 2, and the inner diameter is guided by the guide 17, and the fixed core 1 is set coaxially. Then, the punch 16 set on the press ram 22 via the fixing plate 20 is lowered while being guided to the inner diameter of the yoke 2, and the annular machined teeth at the tip locally verticalize the inner diameter edge near the joint part. to press. Then, a part of the material of the fixed core 1 is plastically flowed perpendicularly to the suppressing direction in the coupling groove portion formed in advance on the outer circumferential coupling surface of the fixed core 1, thereby plastically deforming and coupling the two. After joining, the press ram 22 and punch 16 are raised and the knockout pin 23 is activated to eject the assembled product.
その後、前記製品はアジャストティングスリーブ１２を
固定する。そして、別途組付けられたプランジャロッド
４をスプリング１１、Ｃ形ワッシャ１ｏを介して挿入す
る。その後、更にボールバルブ３を中心部にセットし、
ノズル７を固定したバルブガイド９をヨーク２に挿入配
置し、ヨーク２の内周縁部を前記同様同郡的に垂直に押
圧する。The product then fixes the adjusting sleeve 12. Then, the separately assembled plunger rod 4 is inserted via the spring 11 and C-shaped washer 1o. After that, further set the ball valve 3 in the center,
The valve guide 9 to which the nozzle 7 is fixed is inserted into the yoke 2, and the inner peripheral edge of the yoke 2 is vertically pressed in the same manner as described above.
これによって、バルブガイド９の外周に形成された結合
溝９ａにヨークの材料の一部が前記抑圧方向と直角に塑
性流動されて１両者間が塑性変形結合される。As a result, a part of the material of the yoke is plastically flowed into the coupling groove 9a formed on the outer periphery of the valve guide 9 perpendicular to the suppressing direction, and the two are plastically deformed and coupled.
上記方法による結合は、ヨーク２と固定鉄心１の内径を
ガイド１７に案内させ、同軸上にセットした状態で行う
、従って、固定鉄心１はガイド周面１７Ａで、ヨーク２
はガイド周面１７Ｂで同心状に位置決めされることにな
り、同軸精度が極めて容易に確実に確保される。−力結
合部分そのものも外部からの大きな加圧力により締付は
固定することなく１局部的塑性変形圧を加えるだけであ
るため製品精度も極めて安定したものとなる。又、前記
塑性変形結合は単純なプレス加工でよいため量産性に向
いた手法となる。The connection by the above method is performed with the inner diameters of the yoke 2 and the fixed core 1 being guided by the guide 17 and set coaxially. Therefore, the fixed core 1 is connected to the guide peripheral surface 17A,
are positioned concentrically on the guide peripheral surface 17B, and coaxial accuracy can be ensured very easily and reliably. - Since the force-connecting part itself is not tightened by a large external pressure, only local plastic deformation pressure is applied, so the product accuracy is extremely stable. Furthermore, since the plastic deformation bonding requires simple press working, it is a method suitable for mass production.
更に、バルブガイドの固定も軸方向からの局部的塑性変
形圧により行なわれるため、上記工程で得た部品の精度
をくるわせることなく、同様に精度を上げて組付けるこ
とが可能となる。Furthermore, since the valve guide is fixed by local plastic deformation pressure from the axial direction, it is possible to assemble the valve guide with increased accuracy without compromising the accuracy of the parts obtained in the above process.
以上説明した本実施例の可動子は、ボールバルブがバル
ブガイドの中心案内孔と、プランジャと固定鉄心との間
に設けたガイドリングとでガイドされるため、噴射弁の
軸芯に対する可動部の倒れがなくなる。また、上記倒れ
が防止できれば、可動部の動きが安定し、噴射量特性の
再現性が向上し、倒れによる偏荷重がなくなることにな
り、ガイド部の異常摩耗もなくなり、耐久性が向上する
。In the movable element of this embodiment described above, the ball valve is guided by the center guide hole of the valve guide and the guide ring provided between the plunger and the fixed core, so that the movable part relative to the axis of the injection valve is No more falling down. Moreover, if the above-mentioned collapse can be prevented, the movement of the movable part will be stabilized, the reproducibility of the injection quantity characteristics will be improved, the unbalanced load due to the collapse will be eliminated, the abnormal wear of the guide part will be eliminated, and the durability will be improved.
尚１本実施例では、プランジャの先端に固定した非磁性
材性のガイドリングを介してコアの内周筒部により可動
子をガイドする様に構成したが、ガイドリングをコアの
外周によってガイドする様にしてもよい。In this embodiment, the mover is guided by the inner cylindrical part of the core via a guide ring made of a non-magnetic material fixed to the tip of the plunger, but the guide ring is guided by the outer periphery of the core. You can also do it like this.
また、ガイドリングは必ずしも筒状である必要はなく、
少なくとも円周上に３点の摺動部を備えてあれば足りる
。Also, the guide ring does not necessarily have to be cylindrical,
It is sufficient to have at least three sliding parts on the circumference.
更にまた、ガイドリングを、プランジャ側に限らず固定
鉄心側に固定してガイドリングでプランジャをガイドし
ても同様の効果が得られる。Furthermore, the same effect can be obtained by fixing the guide ring not only on the plunger side but also on the fixed iron core side and guiding the plunger with the guide ring.
本発明によれば、ガイド部間の距離をバルブの全長を長
くすることなく十分に長くとれるので、可動子の軸方向
の移動をバルブの軸心に正確に一致させることができ、
その結果可動子が傾斜した状態で軸方向に移動すること
によって招起される噴射燃料層の再現性が失われる問題
、弁体の弁座に対する片当り現象が排除でき安定した燃
料噴射機能を得られる効果がある。According to the present invention, since the distance between the guide parts can be made sufficiently long without increasing the overall length of the valve, the axial movement of the movable element can be accurately aligned with the axis of the valve.
As a result, the problem of loss of reproducibility of the injected fuel layer caused by the mover moving in the axial direction in an inclined state, and the uneven contact phenomenon of the valve element against the valve seat can be eliminated, and stable fuel injection function can be achieved. It has the effect of
第１図は１本発明の一実施例になる電磁式燃料噴射弁の
断面図、第２図はヨーク、コアの組立構・造を説明する
為の断面図である。FIG. 1 is a sectional view of an electromagnetic fuel injection valve according to an embodiment of the present invention, and FIG. 2 is a sectional view for explaining the assembly structure of a yoke and a core.
Claims (1)
た可動子と、前記プランジャにその先端が対向する磁性
材性の固定鉄心と、該固定鉄心の回りに配置され、通電
時に前記固定鉄心との間に電磁吸引力を生起せしめる電
磁コイルとを備えてなるものにおいて、前記プランジャ
の内径もしくは該プランジャと対向する側の固定鉄心の
内径部に、前記可動子の軸方向の動きを案内するガイド
リングを固設し、該ガイドリングの他方を対向する部材
の内径部に挿入させていることを特徴とした電磁式燃料
噴射弁。 ２、特許請求の範囲第１項記載のものにおいて、ガイド
リングは非磁性体から構成されていることを特徴とした
電磁式燃料噴射弁。 ３、特許請求の範囲第１項記載のものにおいて、ガイド
リングはその内径部にボールバルブを押圧する膨張スプ
リングを保持していることを特徴とした電磁式燃料噴射
弁。[Scope of Claims] 1. A mover having a valve body at one end and a plunger made of magnetic material at the other end, a fixed iron core made of magnetic material whose tip faces the plunger, and a surrounding area of the fixed iron core. and an electromagnetic coil that is arranged on the inner diameter of the plunger or on the inner diameter of the fixed core on the side facing the plunger, and includes an electromagnetic coil that generates an electromagnetic attraction force between the movable core and the fixed core when energized. An electromagnetic fuel injection valve characterized in that a guide ring is fixedly provided to guide the movement of the child in the axial direction, and the other side of the guide ring is inserted into the inner diameter part of the opposing member. 2. The electromagnetic fuel injection valve according to claim 1, wherein the guide ring is made of a non-magnetic material. 3. The electromagnetic fuel injection valve according to claim 1, wherein the guide ring holds an expansion spring in its inner diameter portion for pressing the ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071988A JPS63239358A (en) | 1988-01-22 | 1988-01-22 | Electromagnetic fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071988A JPS63239358A (en) | 1988-01-22 | 1988-01-22 | Electromagnetic fuel injection valve |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61255712A Division JP2515758B2 (en) | 1986-10-29 | 1986-10-29 | Method of manufacturing electromagnetic fuel injection valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63239358A true JPS63239358A (en) | 1988-10-05 |
Family
ID=11758101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1071988A Withdrawn JPS63239358A (en) | 1988-01-22 | 1988-01-22 | Electromagnetic fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63239358A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100472873B1 (en) * | 1997-01-14 | 2005-04-19 | 로베르트 보쉬 게엠베하 | Electronic metering valve for fuel injectors |
-
1988
- 1988-01-22 JP JP1071988A patent/JPS63239358A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100472873B1 (en) * | 1997-01-14 | 2005-04-19 | 로베르트 보쉬 게엠베하 | Electronic metering valve for fuel injectors |
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