JPH03145562A - Fuel injector - Google Patents

Fuel injector

Info

Publication number
JPH03145562A
JPH03145562A JP28271289A JP28271289A JPH03145562A JP H03145562 A JPH03145562 A JP H03145562A JP 28271289 A JP28271289 A JP 28271289A JP 28271289 A JP28271289 A JP 28271289A JP H03145562 A JPH03145562 A JP H03145562A
Authority
JP
Japan
Prior art keywords
fuel
coil bobbin
injector
iron core
coil
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
JP28271289A
Other languages
Japanese (ja)
Inventor
Hiroshi Masuda
博 増田
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.)
Hitachi Unisia Automotive Ltd
Original Assignee
Japan Electronic Control Systems 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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP28271289A priority Critical patent/JPH03145562A/en
Publication of JPH03145562A publication Critical patent/JPH03145562A/en
Pending legal-status Critical Current

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  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE:To effectively cool a coil bobbin and prevent the occurrence of vapor by providing fuel guide paths in the axial direction between the block section of an injector main body and the collar section of the coil bobbin so that fuel flows in a fuel passage between an iron core section and the coil bobbin. CONSTITUTION:A coil bobbin 14 wound with a coil 15 is arranged in a cylindrical injector main body 1 integrally provided with an iron core section 4 at the center section to constitute an electromagnetic solenoid 13 serving as an electromagnetic actuator. When the coil 15 is excited, a valve body 11 is sucked against a disk spring 12 and dissociated from a valve seat member 8, and fuel is injected through a released injection hole 9. Multiple fuel guide paths 31 for guiding the fuel fed into the injector main body 1 to a fuel passage 18' side between the coil bobbin 14 and the iron core section 4 are radially formed between a block section 3 on one side in the axial direction of the injector main body 1 and the collar section 14B of the coil bobbin 14 in a fuel injector.

Description

【発明の詳細な説明】 【産業上の利用分野〕 本発明は、例えば電子制御式燃料噴射装置等に好適に用
いられるフューエルインジェクタに関する。 【従来の技術】 第3図および第4図に従来技術によるフューエルインジ
ェクタを示す。 図において、1は例えば電磁ステンレス鋼製のインジェ
クタ本体で、該インジェクタ本体lは中空の外筒部2と
、該外筒部2の軸方向一側に形成された閉塞部3と該閉
塞部3の中心から軸方向他側に突出し、外周面4A及び
平坦な先端面4Bとによって円柱状に形成された鉄心部
4とからなリ、外筒部2と鉄心部4との間は環状のコイ
ルボビン収容部5になっている。そして、前記外筒部2
にはコイルボビン収容部5に連通ずる燃料流出入口6,
6が径方向に穿設され、閉塞部3には後述するコイルボ
ビン14のビン支持部14E。 14Eが挿嵌される一対の貫通孔7.7(一方は図示せ
ず)が形成されている。 8は前記インジェクタ本体1の軸方向他側を閉塞するよ
うに外筒部2に嵌着された弁座部材で、該弁座部材8は
板状の基部8Aと、該基部8Aの内面中心に前記鉄心部
4側に突出形成された弁座8Bと、基部8Aの外面外周
側から軸方向に突出形成された円筒状のスカート部8C
とから構成されている。9.9は前記弁座部材8に設け
られた噴射孔で、該噴射孔9,9は弁座8Bに開口する
ように基部8Aの中心に穿設されている。 10は前記弁座部材8の内面に当接した状態でインジェ
クタ本体1の外筒部2内に嵌合された環状平板からなる
シム、11は該シム10の内側に遊嵌した状態で前記弁
座部材8と鉄心部4との間に配設された磁性材からなる
平板状の弁体で、該弁体11には弁座8Bの外周側に開
口する燃料流通穴11A、IIAが形成されている。1
2は皿ばねからなる弁ばねを示し、該弁ばね12は内周
縁が前記弁体11の外周縁に圧接することにより該弁体
11を弁座8Bに着座する方向に常時付勢している。 次に、13は前記弁ばね12のばね力に抗して弁体11
を弁座8Bから離間させるための電磁ソレノイドを示す
。14は前記鉄心部4と共に該電磁ソレノイド13を構
成するコイルボビンで、該コイルボビン14は中空の円
筒部14Aと、該円筒部14Aの外周に軸方向に隔設さ
れた一側鍔部14B、中間鍔部14C及び他側鍔部14
Dと、該一側鍔部14Bの外面に突出形成された一対の
円柱状のビン支持部14E、14Eとから構成されてい
る。15は前記中間鍔部14Gと他側鍔部14Dとの間
に位置して円筒部14Aに巻回された電磁コイルで、該
電磁コイル15は前記一側鍔部14Bから各ビン支持部
14Eにかけて挿設された一対の端子ビン16.16と
接続されている。そして、電磁コイル15の外周側は一
例鍔部14Bから他側鍔部14Dにかけて形成された絶
縁性樹脂からなるモールド層17によって被覆されてい
る。 かくして、電磁ソレノイド13は鉄心部4と、コイルボ
ビン14と、電磁コイル15とから大略構成されるが、
コイルボビン14は鉄心部4に挿嵌した状態でインジェ
クタ本体lのコイルボビン収容部5内に収納されており
、外筒部2とモールド層17との間は燃料通路18とな
り、鉄心部4とコイルボビン14の円筒部14Aとの間
の隙間は燃料流路18′になっている。 なお、燃料流路18′は積極的に燃料流路として形成さ
れるものではなく、電磁ソレノイド13を冷却するため
のもので、鉄心部4にコイルボビン14を挿入しやすい
ように形成したテーバ面、コイルボビン14を成形する
ときの「ひけ」等によって形成されるわずかな環状隙間
からなっている。 19は弁体11の開度を規制するためのストッパプレー
トで、該ストッパプレート19は内周側下面に環状のス
トッパ面19Aが突出形成された環状体からなっており
、鉄心部4の先端外周側に位置して該ストッパ面19A
を弁体11に対向させた状態で外筒部2に嵌合されてい
る。そして、該ストッパプレート19によって弁板11
と鉄心部4の先端面4Bとの間には約70ILmのギャ
ップGが保たれるようになっている。 なお、図中20は燃料流出入口6.6を覆うように外筒
部2外周に嵌合されたフィルタ、21は外筒部2の一端
側に嵌着された蓋体である。 従来技術のフューエルインジェクタは上述の如く構成さ
れるが、次にその作動について説明する。 まず、燃料ポンプからの燃料は燃料ホース(図示せず)
、フィルタ20を介して燃料流出入口6.6から外筒部
2内に所定の燃圧をもって供給され、燃料流路18を通
って弁体11近傍に流入する。そして、図示しないコン
トロールユニットからの噴射信号により、端子ビン16
.16を介して電磁コイル15に給電を行うと、鉄心部
4が励磁されてその先端面4B側に弁体11が弁ばね1
2のばね力に抗して吸引されることになる。か(して、
弁体11は弁座8Bから離座して開弁じ、ストッパプレ
ート19のストッパ面19Aに当接した状態に保持され
、燃料流路18内の燃料は燃料流通穴11A、IIAを
通って各噴射孔9から噴射される。 一方、電磁コイル15に対する給電停止時には電磁コイ
ル15が消磁し、弁ばね12のばね力によって弁体11
は弁座8Aに着座して燃料の噴射が停止される。 [発明が解決しようとする課題] ところで、従来技術によれば、電磁コイル15の巻線に
は黄銅線を用いているが、銅線に比較して発熱量が高い
という特質がある。しかもインジェクタ本体1は比較的
小型でその内部は通気性がないため、電磁コイル15の
発熱に伴ってコイルボビン14は次第に高温状態になっ
ている。 一方、コイルボビン14は一側鍔部14Bを閉塞部3に
当接した状態でコイルボビン収容部5内に挿嵌されてい
るため、インジェクタ本体1内に供給された燃料は鉄心
部4と円筒部14Aとの間の燃料流路18′内に流入し
ても、該燃料流路18′内を円滑に流動できないという
問題がある。 このため、電磁コイル15によって加熱されるコイルボ
ビン14を燃料によって冷却することができないばかり
でなく、逆に当該燃料流路18′内の燃料も加熱されて
ベーパーが発生し易くなり、噴射パルスのデユーティに
対応した噴射量の燃料が噴射されずに空燃比が変化して
しまうという欠点がある。 本発明は上述した従来技術の欠点に鑑みなされたもので
、燃料によってコイルボビン全体を冷却し、ベーパーの
発生を防止できるようにしたフューエルインジェクタを
提供するものである。 〔課題を解決するための手段〕 上述した課題を解決するために構成された本発明の手段
の特徴は、インジェクタ本体の閉塞部と電磁アクチュエ
ータを構成するコイルボビンの鍔部との間には、該イン
ジェクタ本体内に供給される燃料を該コイルボビンと前
記鉄心部との間の燃料流路側に導くための燃料導入路を
設けたことにある。 [作用] 燃料導入路から燃料が供給されることにより、燃料流路
内の燃料はコイルボビンの軸方向一側から弁板側の他側
に流動し、この間にコイルボビンを冷却する。 〔実施例〕 以下、本発明の実施例を第1図および第2図に基づき詳
述する。なお、前述した従来技術の構成要素と同一の構
成要素には同一符号を付し、その説明を省略する。 然るに、図において31,31.・・・はインジェクタ
本体1の閉塞部3とコイルボビン14の一側鍔部14B
との間に位置して該一側御部14Bに放射状に設けられ
た複数の燃料導入路で、該各燃料導入路31は該一側御
部14Bの外面に外周縁から内周縁にかけて径方向に凹
設した溝32によって形成されている。 更に、本実施例によれば、コイルボビン14の円筒部1
4A内周面には鉄心部4の外周面4Aに対面して前記各
燃料導入路31と連通ずる燃料流通溝33.33.・・
・が軸方向に形成され、燃料通路18′の一部を構成し
ている。 本実施例のフューエルインジェクタは上述の如き構成を
有するもので、その基本的作動については従来技術によ
るものと格別差異はない。 然るに、本実施例のコイルボビン14には一側鍔部14
Bの外面に位置して複数の燃料導入%31.31.・・
・を放射状に設けである。従って燃料流出入口6.6を
介してインジェクタ本体1内に供給される燃料は該各燃
料導入路31を介して鉄心部4と円筒部14Aとの間の
燃料流路18′側に円滑に流入できる。しかも、該各燃
料導入路31を設けることによって燃料流路18′の軸
方向両側は解放された状態になるから、燃料は滞留する
ことなく円滑に流動し、コイルボビン14を冷却するこ
とができる。 しかも、本実施例では、鉄心部4とコイルボビン14と
の隙間からなる燃料流路18′に臨んで円筒部14Aの
内周面に軸方向の燃料流通溝33.33.・・・を設け
て燃料流路18′の断面積を拡大したから、鉄心部4と
コイルボビン14との間には従来技術に比較して多量の
燃料を流動させることができ、コイルボビン14を一層
効果的に冷却することができる。 [発明の効果] 取上の如く本発明によれば、インジェクタ本体の閉塞部
とコイルボビンの鍔部との間に径方向に燃料導入路を設
け、鉄心部とコイルボビンとの間の燃料流路内を燃料が
円滑に流動するようにしたから、コイルボビンが高温に
なるのを燃料によって冷却することができ、燃料中にペ
ーパーが発生するのを防止して空燃比を所定の値に維持
することができる。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuel injector suitably used in, for example, an electronically controlled fuel injection device. 2. Description of the Related Art FIGS. 3 and 4 show fuel injectors according to the prior art. In the figure, reference numeral 1 denotes an injector body made of electromagnetic stainless steel, for example, and the injector body l includes a hollow outer cylinder part 2, a closing part 3 formed on one side in the axial direction of the outer cylinder part 2, and a closing part 3 formed on one side of the outer cylinder part 2 in the axial direction. An annular coil bobbin is formed between the outer cylindrical part 2 and the iron core part 4, and is formed into a cylindrical shape by an outer circumferential surface 4A and a flat end surface 4B. It is a storage part 5. Then, the outer cylinder part 2
has a fuel inlet 6 communicating with the coil bobbin housing portion 5;
6 is drilled in the radial direction, and the closing portion 3 includes a bottle support portion 14E for a coil bobbin 14, which will be described later. A pair of through holes 7.7 (one not shown) are formed into which the holes 14E are inserted. Reference numeral 8 denotes a valve seat member fitted into the outer cylinder portion 2 so as to close the other side in the axial direction of the injector main body 1. The valve seat member 8 has a plate-shaped base 8A, and a valve seat member 8 located at the center of the inner surface of the base 8A. A valve seat 8B is formed to protrude toward the iron core portion 4 side, and a cylindrical skirt portion 8C is formed to protrude in the axial direction from the outer peripheral side of the outer surface of the base portion 8A.
It is composed of. Reference numeral 9.9 denotes an injection hole provided in the valve seat member 8, and the injection holes 9, 9 are bored in the center of the base 8A so as to open into the valve seat 8B. Reference numeral 10 denotes a shim consisting of an annular flat plate fitted into the outer cylindrical portion 2 of the injector main body 1 while in contact with the inner surface of the valve seat member 8; A flat valve body made of a magnetic material is disposed between the seat member 8 and the iron core portion 4, and the valve body 11 is formed with fuel flow holes 11A and IIA that open on the outer peripheral side of the valve seat 8B. ing. 1
Reference numeral 2 indicates a valve spring made of a disc spring, and the inner peripheral edge of the valve spring 12 is in pressure contact with the outer peripheral edge of the valve body 11, thereby constantly urging the valve body 11 in a direction to seat it on the valve seat 8B. . Next, the valve element 13 is moved against the spring force of the valve spring 12.
An electromagnetic solenoid for separating the valve from the valve seat 8B is shown. Reference numeral 14 denotes a coil bobbin that constitutes the electromagnetic solenoid 13 together with the iron core portion 4. The coil bobbin 14 includes a hollow cylindrical portion 14A, one side flange portion 14B spaced apart in the axial direction on the outer periphery of the cylindrical portion 14A, and an intermediate flange. Part 14C and other side flange part 14
D, and a pair of cylindrical bottle support parts 14E, 14E projecting from the outer surface of the one side flange part 14B. Reference numeral 15 denotes an electromagnetic coil located between the intermediate flange 14G and the other flange 14D and wound around the cylindrical portion 14A. It is connected to a pair of inserted terminal pins 16.16. The outer peripheral side of the electromagnetic coil 15 is covered with a mold layer 17 made of an insulating resin and formed from the flange 14B to the other flange 14D, for example. Thus, the electromagnetic solenoid 13 is roughly composed of the iron core 4, the coil bobbin 14, and the electromagnetic coil 15.
The coil bobbin 14 is inserted into the iron core part 4 and stored in the coil bobbin accommodating part 5 of the injector main body l, and a fuel passage 18 is formed between the outer cylinder part 2 and the mold layer 17, and the coil bobbin 14 is inserted into the iron core part 4. The gap between the cylindrical portion 14A and the cylindrical portion 14A is a fuel flow path 18'. Note that the fuel flow path 18' is not actively formed as a fuel flow path, but is for cooling the electromagnetic solenoid 13, and has a tapered surface formed to facilitate insertion of the coil bobbin 14 into the iron core 4. It consists of a slight annular gap formed by "sink marks" etc. when forming the coil bobbin 14. Reference numeral 19 denotes a stopper plate for regulating the opening degree of the valve body 11. The stopper plate 19 is an annular body having an annular stopper surface 19A protruding from the lower surface of the inner circumferential side. The stopper surface 19A is located on the side.
is fitted into the outer cylindrical portion 2 in a state where it faces the valve body 11. Then, the stopper plate 19 causes the valve plate 11 to
A gap G of approximately 70 ILm is maintained between the tip face 4B of the iron core portion 4 and the tip face 4B of the iron core portion 4. In addition, in the figure, 20 is a filter fitted to the outer periphery of the outer cylindrical part 2 so as to cover the fuel inlet/outlet 6.6, and 21 is a lid fitted to one end side of the outer cylindrical part 2. The conventional fuel injector is constructed as described above, and its operation will now be described. First, the fuel from the fuel pump is connected to a fuel hose (not shown).
The fuel is supplied at a predetermined pressure into the outer cylindrical portion 2 from the fuel inlet/outlet 6.6 via the filter 20, and flows into the vicinity of the valve body 11 through the fuel passage 18. Then, the terminal bin 16 is activated by an injection signal from a control unit (not shown).
.. When power is supplied to the electromagnetic coil 15 through the electromagnetic coil 16, the iron core 4 is excited, and the valve body 11 is attached to the valve spring 1 on the distal end surface 4B side.
It will be attracted against the spring force of 2. (then,
The valve body 11 is separated from the valve seat 8B and opened, and is held in contact with the stopper surface 19A of the stopper plate 19, and the fuel in the fuel passage 18 passes through the fuel distribution holes 11A and IIA to each injection. It is injected from the hole 9. On the other hand, when the power supply to the electromagnetic coil 15 is stopped, the electromagnetic coil 15 is demagnetized, and the spring force of the valve spring 12 causes the valve body to
is seated on the valve seat 8A, and fuel injection is stopped. [Problems to be Solved by the Invention] According to the prior art, brass wire is used for the winding of the electromagnetic coil 15, but it has a characteristic that it generates a higher amount of heat than copper wire. Moreover, since the injector main body 1 is relatively small and has no ventilation inside, the coil bobbin 14 gradually becomes hotter as the electromagnetic coil 15 generates heat. On the other hand, since the coil bobbin 14 is inserted into the coil bobbin accommodating part 5 with the one side flange part 14B in contact with the closing part 3, the fuel supplied into the injector body 1 is transferred to the iron core part 4 and the cylindrical part 14A. There is a problem in that even if the fuel flows into the fuel passage 18' between the two, it cannot flow smoothly within the fuel passage 18'. For this reason, not only is it impossible to cool the coil bobbin 14 heated by the electromagnetic coil 15 with fuel, but also the fuel in the fuel flow path 18' is heated and vapor is likely to be generated, which reduces the duty of the injection pulse. There is a drawback that the air-fuel ratio changes without injecting an amount of fuel corresponding to the injection amount. The present invention has been made in view of the above-mentioned drawbacks of the prior art, and provides a fuel injector that can cool the entire coil bobbin with fuel and prevent the generation of vapor. [Means for Solving the Problems] A feature of the means of the present invention configured to solve the above-mentioned problems is that there is a gap between the closing part of the injector body and the collar part of the coil bobbin constituting the electromagnetic actuator. A fuel introduction path is provided for guiding the fuel supplied into the injector body to the fuel flow path between the coil bobbin and the iron core. [Operation] By supplying fuel from the fuel introduction passage, the fuel in the fuel flow passage flows from one side of the coil bobbin in the axial direction to the other side of the valve plate, cooling the coil bobbin during this time. [Example] Hereinafter, an example of the present invention will be described in detail based on FIGS. 1 and 2. Note that the same reference numerals are given to the same components as those of the prior art described above, and the explanation thereof will be omitted. However, in the figure, 31, 31. . . . indicates the closing portion 3 of the injector body 1 and the one side collar portion 14B of the coil bobbin 14.
A plurality of fuel introduction passages 31 are provided radially in the one side control part 14B, and each fuel introduction passage 31 extends radially from the outer circumference to the inner circumference on the outer surface of the one side control part 14B. It is formed by a groove 32 recessed in the groove 32 . Furthermore, according to this embodiment, the cylindrical portion 1 of the coil bobbin 14
Fuel circulation grooves 33, 33. 4A are provided on the inner circumferential surface of the iron core portion 4, facing the outer circumferential surface 4A of the iron core portion 4, and communicating with each of the fuel introduction passages 31.・・・
is formed in the axial direction and constitutes a part of the fuel passage 18'. The fuel injector of this embodiment has the configuration described above, and its basic operation is not particularly different from that of the prior art. However, the coil bobbin 14 of this embodiment has one side flange 14.
Multiple fuel introductions located on the outer surface of B%31.31.・・・
- are provided radially. Therefore, the fuel supplied into the injector body 1 through the fuel inlet/outlet 6.6 smoothly flows into the fuel flow path 18' side between the iron core part 4 and the cylindrical part 14A through the fuel introduction passages 31. can. Furthermore, by providing each of the fuel introduction passages 31, both sides of the fuel flow passage 18' in the axial direction are opened, so that the fuel flows smoothly without stagnation, and the coil bobbin 14 can be cooled. Moreover, in this embodiment, axial fuel flow grooves 33, 33. ... is provided to enlarge the cross-sectional area of the fuel flow path 18', a larger amount of fuel can flow between the iron core 4 and the coil bobbin 14 than in the prior art, and the coil bobbin 14 can be Can be effectively cooled. [Effects of the Invention] As mentioned above, according to the present invention, a fuel introduction passage is provided in the radial direction between the closing part of the injector body and the flange of the coil bobbin, and the fuel passage is provided in the fuel flow passage between the iron core part and the coil bobbin. Since the fuel flows smoothly, the high temperature of the coil bobbin can be cooled by the fuel, preventing paper from forming in the fuel and maintaining the air-fuel ratio at a predetermined value. can.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図及び第2図は本発明の実施例に係り、第1図はフ
ューエルインジェクタを第2図中I−I矢示方向の状態
で切断して示す全体構成図、第2図は外周がモールド層
によって被覆されたコイルボビンの外観斜視図、第3図
及び第4図は従来技術に係り、第3図はフューエルイン
ジェクタを第1図と同様の状態で示す全体構成図、第4
図は外周がモールド層によって被覆されたコイルボビン
の外観斜視図である。 1・・・インジェクタ本体、2・・・外筒部、3・・・
閉塞部、4・・・鉄心部、4A・・・外周面、8・・・
弁座部材、9・・・噴射孔、11・・・弁体、12・・
・皿ばね、13・・・電磁アクチュエータ、18.18
’・・・燃料流路、31・・・燃料導入路、32・・・
溝、33・・・燃料流通溝。
1 and 2 relate to an embodiment of the present invention, FIG. 1 is an overall configuration diagram showing the fuel injector cut in the direction of arrow I-I in FIG. 2, and FIG. 2 shows the outer periphery. 3 and 4, which are perspective views of the appearance of a coil bobbin covered with a mold layer, relate to the prior art; FIG.
The figure is an external perspective view of a coil bobbin whose outer periphery is covered with a mold layer. 1... Injector main body, 2... Outer cylinder part, 3...
Closed part, 4... Iron core part, 4A... Outer peripheral surface, 8...
Valve seat member, 9... injection hole, 11... valve body, 12...
・Disc spring, 13...electromagnetic actuator, 18.18
'... Fuel flow path, 31... Fuel introduction path, 32...
Groove, 33...Fuel distribution groove.

Claims (1)

【特許請求の範囲】[Claims] 軸方向一側に閉塞部が設けられた外筒部内を軸方向に鉄
心部が伸びる筒状のインジェクタ本体と、該インジェク
タ本体の先端側を閉塞するように設けられた弁座部材と
、該弁座部材に設けられ、前記インジェクタ本体内の燃
料を噴射する噴射孔と、前記弁座部材の弁座に離着座す
ることにより該噴射孔を開閉する平板状の弁体と、該弁
体を前記弁座に着座するように常時付勢するばねと、コ
イルを巻回してなるコイルボビンを前記インジェクタ本
体内に位置して前記鉄心部に挿嵌し、前記コイルに通電
することによって前記ばねのばね力に抗して弁体を開弁
する電磁アクチュエータと、該電磁アクチュエータによ
り吸引される前記弁体の開度を規制すべく該電磁アクチ
ュエータと弁体との間に配設されたストッパプレートと
から構成してなるフューエルインジェクタにおいて、前
記インジェクタ本体の閉塞部と前記電磁アクチュエータ
を構成するコイルボビンの鍔部との間には、該インジェ
クタ本体内に供給される燃料を該コイルボビンと前記鉄
心部との間の燃料流路側に導くための燃料導入路を設け
たことを特徴とするフューエルインジェクタ。
A cylindrical injector body in which an iron core extends in the axial direction within an outer cylinder part provided with a closing part on one side in the axial direction, a valve seat member provided to close a distal end side of the injector body, and the valve. an injection hole provided in a seat member for injecting fuel in the injector main body; a flat valve body that opens and closes the injection hole by seating on and off the valve seat of the valve seat member; A spring that is always biased to sit on the valve seat and a coil bobbin formed by winding a coil are positioned inside the injector body and inserted into the iron core, and the spring force of the spring is reduced by energizing the coil. An electromagnetic actuator that opens the valve body against the pressure, and a stopper plate disposed between the electromagnetic actuator and the valve body to regulate the degree of opening of the valve body that is attracted by the electromagnetic actuator. In the fuel injector, there is a space between the closing part of the injector main body and the flange part of the coil bobbin constituting the electromagnetic actuator, and the fuel to be supplied into the injector main body is arranged between the coil bobbin and the iron core part. A fuel injector characterized by having a fuel introduction path for guiding fuel to a fuel flow path side.
JP28271289A 1989-10-30 1989-10-30 Fuel injector Pending JPH03145562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28271289A JPH03145562A (en) 1989-10-30 1989-10-30 Fuel injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28271289A JPH03145562A (en) 1989-10-30 1989-10-30 Fuel injector

Publications (1)

Publication Number Publication Date
JPH03145562A true JPH03145562A (en) 1991-06-20

Family

ID=17656067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28271289A Pending JPH03145562A (en) 1989-10-30 1989-10-30 Fuel injector

Country Status (1)

Country Link
JP (1) JPH03145562A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6780556B2 (en) 2001-03-02 2004-08-24 Ricoh Company Limited External additive for electrophotographic toner, method for manufacturing the external additive, electrophotographic toner using the external additive, and image forming apparatus using the electrophotographic toner
JP2011525583A (en) * 2008-06-27 2011-09-22 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 injector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63201365A (en) * 1987-02-13 1988-08-19 フアオ・デー・オー・アードルフ・シントリング・アクチエンゲゼルシヤフト Fuel injection valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63201365A (en) * 1987-02-13 1988-08-19 フアオ・デー・オー・アードルフ・シントリング・アクチエンゲゼルシヤフト Fuel injection valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6780556B2 (en) 2001-03-02 2004-08-24 Ricoh Company Limited External additive for electrophotographic toner, method for manufacturing the external additive, electrophotographic toner using the external additive, and image forming apparatus using the electrophotographic toner
JP2011525583A (en) * 2008-06-27 2011-09-22 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 injector

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