JPS6179859A - Electromagnetic fuel injection valve - Google Patents
Electromagnetic fuel injection valveInfo
- Publication number
- JPS6179859A JPS6179859A JP20339084A JP20339084A JPS6179859A JP S6179859 A JPS6179859 A JP S6179859A JP 20339084 A JP20339084 A JP 20339084A JP 20339084 A JP20339084 A JP 20339084A JP S6179859 A JPS6179859 A JP S6179859A
- Authority
- JP
- Japan
- Prior art keywords
- core
- movable core
- spring
- fixed
- iron core
- 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
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、例えば自動車用エンジンの燃料供給装置とし
て使用される電磁式燃料噴射弁に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electromagnetic fuel injection valve used, for example, as a fuel supply device for an automobile engine.
（従来の技術）
従来より、自動車用エンジンの燃料供給装置の一構成部
品として、日本電装公開技報・整理番号３４−１００に
示されるような電磁式燃料噴射弁が用いられている。(Prior Art) Conventionally, an electromagnetic fuel injection valve as shown in Nippon Denso Publications Technical Report No. 34-100 has been used as a component of a fuel supply system for an automobile engine.
この電磁式燃料噴射弁は、ハウジング内部に固定鉄心と
可動コアとがスプリングを挟んで隙間を介し対向して設
けられており、ハウジング内部の固定鉄心と可動コアと
の外周部に位置する電磁コイルに電流パルスが供給され
ることで可動コアと固定鉄心との間に吸引力が生じ、こ
の吸引力がスプリングの力に打ち勝って可動コアが固定
鉄心側に引き寄せられ、そして可動コアと一体に連結さ
れたニードル弁がノズルボディ内を摺動し、ノズルボデ
ィ先端の燃料噴射孔を開き、フィルタを介して、ノズル
ボディの外周部に形成された複数の孔からなる燃料供給
口を通ってノズルボディ内部に流入する燃料を、燃料噴
射孔より噴射するものである。This electromagnetic fuel injection valve has a fixed core and a movable core placed inside the housing, facing each other with a spring in between, and an electromagnetic coil located on the outer periphery of the fixed core and the movable core inside the housing. An attractive force is generated between the movable core and the fixed core by supplying a current pulse to the fixed core, and this attractive force overcomes the force of the spring to draw the movable core toward the fixed core, which then connects the movable core as one unit. The needle valve slides inside the nozzle body, opens the fuel injection hole at the tip of the nozzle body, passes through a filter, and passes through the fuel supply port, which is made up of multiple holes formed on the outer periphery of the nozzle body, to the nozzle body. The fuel flowing inside is injected from the fuel injection hole.
（発明が解決しようとする問題点）
上述した電磁式燃料噴射弁においては、可動コアの内部
の中心部穴にスプリングが位置し、アジャストロッドの
端部とニードル弁の端部とに当接した構成となっており
、可動コアが吸引されて固定鉄心側に移動する時、スプ
リング４の位置ずれにより可動コアの中心部穴の壁面と
スプリングとが接触し、可動コアすなわちニードル弁の
動きを阻害し、毎回の挙動が不安定になるという問題点
があった。(Problems to be Solved by the Invention) In the electromagnetic fuel injection valve described above, the spring is located in the center hole inside the movable core, and the spring is in contact with the end of the adjustment rod and the end of the needle valve. When the movable core is attracted and moves toward the fixed core, the spring 4 comes into contact with the wall surface of the center hole of the movable core due to the misalignment of the spring 4, which obstructs the movement of the movable core, that is, the needle valve. However, there was a problem that the behavior became unstable each time.
従って、本発明の目的とする点は、ニードル弁の毎回の
挙動を安定したものとし、良好な燃料噴射が、常時実行
される電磁的燃料噴射弁を提供することにある。Accordingly, an object of the present invention is to provide an electromagnetic fuel injection valve that makes the behavior of the needle valve stable every time and ensures good fuel injection at all times.
（問題を解決するための手段）
上記の問題点を解決するために、本発明においては、ハ
ウジング内部に設けられた固定鉄心と、この固定鉄心と
隙間を介し対向して設けられ、固定鉄心の外周に備えら
れた電磁コイルに電流パルスが供給されることで、固定
鉄心側に吸引される可動コアと、この可動コアと一体的
に連結され可動コアの動きに応じてノズルボディ先端に
形成された燃料噴射穴を開閉するニードル弁と、前記可
動コアの内部の中心部穴に位置し、前記ニードル弁の端
部と前記固定鉄心の内部に設けられたアジヤス１−ロッ
ドの端部とに当接し、常時、固定鉄心と可動コアとを離
間する方向に力を発生するスプリングと、前記アジャス
トロッドの端部より突出し、前記スプリングの変動を案
内するガイドを有するアジャストロッドとから構成され
る電磁式燃料噴射弁としている。(Means for Solving the Problems) In order to solve the above problems, the present invention includes a fixed iron core provided inside the housing, a fixed iron core provided opposite to the fixed iron core with a gap therebetween, and By supplying current pulses to the electromagnetic coil provided on the outer periphery, the movable core is attracted to the fixed core side, and the movable core is integrally connected to the movable core and formed at the tip of the nozzle body according to the movement of the movable core. a needle valve that opens and closes a fuel injection hole; and an azimuth rod located in a central hole inside the movable core, which corresponds to an end of the needle valve and an end of an azimuth rod provided inside the fixed core. An electromagnetic type consisting of a spring that is in contact with the fixed iron core and the movable core and that always generates a force in the direction of separating the fixed core and the movable core, and an adjustment rod that protrudes from the end of the adjustment rod and has a guide that guides the fluctuation of the spring. It is used as a fuel injection valve.
（実施例） 本発明の第１実施例について第１図に基づき説明する。(Example) A first embodiment of the present invention will be described based on FIG.
第１図において、１はハウジングであり、下端にノズル
ボディ２を鮫め１ａにより保持している。In FIG. 1, reference numeral 1 denotes a housing, and a nozzle body 2 is held at the lower end by a shark holder 1a.
ノズルボディ２にはニードル弁３が軸方向へ移動自在に
収容されており、このニードル弁３はノズルボディ２の
弁座４に着座している場合、燃料噴射孔５を閉じている
が、弁座４から離れると燃料噴射孔５を開（。A needle valve 3 is housed in the nozzle body 2 so as to be movable in the axial direction. When the needle valve 3 is seated on the valve seat 4 of the nozzle body 2, the fuel injection hole 5 is closed. When you leave the seat 4, the fuel injection hole 5 opens (.
ハウジング１内にはその中心部に位置して管状の固定鉄
心６が設けられており、この固定鉄心６は上記ハウジン
グｌの上端部１ｂを固定鉄心６のフランジ６ｂに対して
絞めることによりハウジング１に固着されている。なお
、固定鉄心６のフランジ管６ｂの外周とハウジング１と
の間にはＯＵフグ９が配設されており、このＯリング９
により両者間の液密が保持されている。A tubular fixed iron core 6 is provided in the center of the housing 1, and the fixed iron core 6 is attached to the housing 1 by squeezing the upper end 1b of the housing 1 against the flange 6b of the fixed iron core 6. is fixed to. Note that an OU puffer 9 is disposed between the outer periphery of the flange pipe 6b of the fixed iron core 6 and the housing 1, and this O-ring 9
This maintains liquid tightness between the two.
ハウジング１と鉄心６との間に形成された環状空間内に
はスプール７に巻回された電磁コイル８が収容されてお
り、この電磁コイル８はハウジング１と一体になった合
成樹脂製のコネクタ１１に取り付けられている端子１２
に接続されている。An electromagnetic coil 8 wound around a spool 7 is housed in an annular space formed between the housing 1 and the iron core 6, and this electromagnetic coil 8 is connected to a synthetic resin connector integrated with the housing 1. Terminal 12 attached to 11
It is connected to the.
この端子１２はハウジング部６ｂを貫通ずる位置に円筒
部１２ａを有しており、この円筒部１２ａの外周にはフ
ランジ部６ｂを貫通する位置と円筒部１２ａとの間の液
密性を保持する０リング１０が設けられている。また、
この端子１２はコンピュータなどの電子制御装置１３に
接続され、この電子制御装置１３からの電流パルス１３
ａを受は取り、その電流パルス１３ａを電磁コイル８に
伝えている。This terminal 12 has a cylindrical part 12a at a position that passes through the housing part 6b, and the outer periphery of this cylindrical part 12a maintains liquid tightness between the position that passes through the flange part 6b and the cylindrical part 12a. An O ring 10 is provided. Also,
This terminal 12 is connected to an electronic control device 13 such as a computer, and a current pulse 13 from this electronic control device 13 is connected.
The current pulse 13a is transmitted to the electromagnetic coil 8.
固定鉄心６の中心部穴６ｃにはアジャストロッド１８が
収容されており、固定鉄心６の上部６ａを絞めることに
より固定鉄心６に固定されている。An adjustment rod 18 is housed in the center hole 6c of the fixed core 6, and is fixed to the fixed core 6 by squeezing the upper part 6a of the fixed core 6.
このアジャストロッド１８のほぼ中央部には２ｉ￥＃部
１８ｂが設けられており、この溝部Ｌ８ｂを固定鉄心６
の中心部穴６ｃの壁面との間に両者間の液密性を保持す
るための０リング１４が設けられている。また、このア
ジャストロッド１８の図中左端部には、アジヤスＩ・ロ
ッド１８の端部より突出し、固定鉄心６と対向して設け
られる可動コア２０の中心部穴２０ａ内に位置するガイ
ドｔＳａが設けられている。A 2i\# section 18b is provided at approximately the center of this adjustment rod 18, and this groove section L8b is connected to the fixed iron core 6.
An O-ring 14 is provided between the center hole 6c and the wall surface of the center hole 6c to maintain liquid tightness between the two. Further, a guide tSa is provided at the left end of the adjustment rod 18 in the figure, which protrudes from the end of the adjuster I rod 18 and is located within the center hole 20a of the movable core 20, which is provided facing the fixed iron core 6. It is being
固定鉄心６と対向して設けられる可動コア２０は、ニー
ドル弁３の頭部２２を可動コア２０の内部に挿入し、可
動コア２０の外周を絞めることにより一体的に連結され
ており、さらに可動コア２０の中実軸方向に中心部穴２
０ａを備えており、ハウジング１内を軸方向へ移動自在
となるように収容されている。The movable core 20 provided facing the fixed iron core 6 is integrally connected by inserting the head 22 of the needle valve 3 into the interior of the movable core 20 and tightening the outer periphery of the movable core 20. Center hole 2 in the direction of the solid axis of the core 20
0a, and is housed so as to be freely movable in the axial direction within the housing 1.
そして、可動ア２０の中心部穴２０中にスプリング１９
が中心部穴２０ａの壁面に対し所定の隙間を介して設け
られており、このスプリング１９の一端は、前記アジャ
ストロッド１８の図中左端部に、他端は可動コア２０と
連結されたニードル弁３の頭２２の端部を当接し、可動
コア２０と固定鉄心６とを離間する方向に常時押圧力を
発生している。さらにこのスプリング１９はその内周側
が前記ガイド１８ａの外周側にごくわずかな隙間を介し
て沿った状態で設けられており、スプリング１９の伸縮
時、ガイド１８ａによりスプリング１９は案内され、ス
プリング１９の位置ずれ、これによる可動コア２０の中
心部穴２０ａとの接触は無い。なお、スプリング１９の
セット荷重は、上記アジャストロッド１８を固定鉄心６
に対して固定される位置を調整することによって設定さ
れる。A spring 19 is inserted into the center hole 20 of the movable arm 20.
is provided with a predetermined gap from the wall surface of the center hole 20a, one end of this spring 19 is connected to the left end of the adjustment rod 18 in the figure, and the other end is connected to the needle valve connected to the movable core 20. The end portion of the head 22 of the movable core 20 and the fixed iron core 6 are brought into contact with each other, and a pressing force is constantly generated in the direction of separating the movable core 20 and the fixed iron core 6. Furthermore, this spring 19 is provided with its inner circumferential side along the outer circumferential side of the guide 18a with a very small gap therebetween, and when the spring 19 expands and contracts, the spring 19 is guided by the guide 18a, and the spring 19 is guided by the guide 18a. There is no positional shift and no contact with the center hole 20a of the movable core 20 due to this. Note that the set load of the spring 19 is determined by the adjustment rod 18
is set by adjusting the fixed position relative to the
可動コア２０と一体的に連結されるニードル弁３にはス
トッパをなすフランジ２７が設けられ、このフランジ２
７の図中左方には各々４面取りされたガイド部２８およ
び２９が形成されている。The needle valve 3 that is integrally connected to the movable core 20 is provided with a flange 27 that serves as a stopper.
7, guide portions 28 and 29 each having four chamfers are formed on the left side in the figure.
これらガイド部２８．２９は、ノズルボディ２の摺動孔
３０に対して隙間を介して摺動する。ニードル弁３はス
ペーサ３２の透孔３３中を、隙間を介して貫通されてい
る。また、このニードル弁３が図中右方向に移動（リフ
ト）された場合、上記フランジ２７がスペーサ３２に当
たってそのリフト量が規制される。These guide parts 28 and 29 slide with respect to the sliding hole 30 of the nozzle body 2 through a gap. The needle valve 3 is passed through the through hole 33 of the spacer 32 via a gap. Further, when the needle valve 3 is moved (lifted) to the right in the drawing, the flange 27 hits the spacer 32, and the amount of lift is regulated.
ハウジングｌおよびノズルボディ２の外周には、円筒状
のフィルタ１５が両者を覆うように設けられており、フ
ィルタ１５を介してその内部に流入する所定圧力に調整
された燃料の一部は、電磁コイル８の同図に導びかれ、
電磁コイル８を冷却するように働き、また他の燃料はノ
ズルボディ２の外周部分に形成された複数個の孔からな
る燃料供給口３１を介して７１ズルボデイ２の内辺へと
導びかれている。A cylindrical filter 15 is provided on the outer periphery of the housing l and the nozzle body 2 so as to cover both, and a part of the fuel that has been adjusted to a predetermined pressure and flows into the inside through the filter 15 is electromagnetically Guided by the same diagram of coil 8,
It acts to cool the electromagnetic coil 8, and other fuel is guided to the inner side of the nozzle body 2 through a fuel supply port 31 formed in the outer circumference of the nozzle body 2. There is.
前述した構成の電磁式燃料噴射弁にあっては、フィルタ
１５を通り、一定圧力に加圧された燃料が、ノズルボデ
ィ２に設けた燃料供給口３１と、ガイド部２９と摺動孔
３０との間の隙間を経て、弁座４に至る。In the electromagnetic fuel injection valve having the above-described configuration, the fuel that has passed through the filter 15 and is pressurized to a constant pressure is supplied to the fuel supply port 31 provided in the nozzle body 2, the guide portion 29, and the sliding hole 30. It reaches the valve seat 4 through the gap between.
そして電子制御装置１３から電流パルス１３ａが電磁コ
イル８に供給されていない場合、固定鉄心６が磁化され
ないので可動コア２０がスプリング１９の押圧力を受け
て押し下げられており、ニードル弁３は弁座４に密着し
て燃料噴射孔５を閉じている。Ｊって燃料は噴射されな
い。When the electric current pulse 13a is not supplied from the electronic control device 13 to the electromagnetic coil 8, the fixed core 6 is not magnetized and the movable core 20 is pushed down by the pressing force of the spring 19, and the needle valve 3 is 4 and closes the fuel injection hole 5. J means no fuel is injected.
電子制御装置１３から電磁コイル８へ電流パルス１３ａ
が印加されると、固定鉄心６が磁化され、よって可動コ
ア２０がスプリング１９の付勢力に抗して固定鉄心６に
吸引される。このため可動コア２０に連結されているニ
ードル弁３がリフトされ、よって弁座４から離れるので
燃料噴射孔５が開き、燃料噴射孔５の直前まで達してい
た燃料が噴射される。Current pulse 13a from electronic control device 13 to electromagnetic coil 8
When is applied, the fixed iron core 6 is magnetized, and the movable core 20 is therefore attracted to the fixed iron core 6 against the biasing force of the spring 19. For this reason, the needle valve 3 connected to the movable core 20 is lifted and is therefore separated from the valve seat 4, so that the fuel injection hole 5 is opened and the fuel that has reached just before the fuel injection hole 5 is injected.
電磁コイル８に対する電流パルスＬ３ａの印加が終了す
ると、固定鉄心６の磁化が消滅するため、固定鉄心６に
よる可動コア２０−・の吸引力が無くなり、可動コア２
０がスプリング１９の押圧力を受けて下方へ移動され、
従ってニードル弁３が弁座４に着座するので燃料噴射孔
５を閉じ、もって燃料の噴射を終える。When the application of the current pulse L3a to the electromagnetic coil 8 ends, the magnetization of the fixed iron core 6 disappears, so the attraction force of the fixed iron core 6 to the movable core 20- is lost, and the movable core 2
0 is moved downward under the pressure of the spring 19,
Therefore, since the needle valve 3 is seated on the valve seat 4, the fuel injection hole 5 is closed, thereby completing fuel injection.
この一連のニードル弁３とこれと一体的に連結されてい
る可動コア２０の動作時、可動コア２゜の中心部穴２０
ａ内のスプリング１９は、アジヤス１−ロッド１８のガ
イド１８ａに案内されているのでスプリング１９の位置
ずれが防止され、スプリング１９と可動コア２０の中心
部穴２０ａの壁面との所定の隙間は常に維持されて、中
心部穴２０ａの壁面に接触することは無い。従って、ス
プリング１９は可動部であるニードル弁３および可動コ
ア２０の移動を阻害せず、ニードル弁３の毎回の挙動は
安定したものとなる。When the series of needle valves 3 and the movable core 20 integrally connected thereto operate, the center hole 20 of the movable core 2°
Since the spring 19 in a is guided by the guide 18a of the rod 18, the spring 19 is prevented from shifting, and a predetermined gap between the spring 19 and the wall of the center hole 20a of the movable core 20 is always maintained. It is maintained and does not come into contact with the wall surface of the center hole 20a. Therefore, the spring 19 does not inhibit the movement of the needle valve 3 and the movable core 20, which are movable parts, and the behavior of the needle valve 3 is stable every time.
次に本発明の第２実施例について、第２図により説明す
る。Next, a second embodiment of the present invention will be described with reference to FIG.
前述の第１実施例においてガイド１８ａはアジャストロ
ッド１８の第１図中左方端に設けたが、本実施例ではこ
のガイドＬ８ａをアジャストロッド１８の両端に設けて
左右対称形状とし、組付方向性をなくすことによって組
付性向上を図っている。さらにガイド１８ａに溝部１８
ｃを設けており、これにより噴射弁の噴射量調整時にア
ジャストロッド１８を移動させてスプリング１９のセッ
ト荷重を調整するに当って、アジャストロッド１８の第
２図中右方端の溝部１８ｃを引っ掛り部として引っ張る
ことが可能となり、調整中のアジャストロッド１８と固
定鉄心６の中心部穴６Ｃとの間の液密用ＯリングＬ４の
摺動抵抗によるアジャストロッド１８の図中右方向への
戻り遅れを解消することができ、噴射弁の噴射量調整時
間を短縮できるという他の効果も得られる。In the first embodiment described above, the guide 18a was provided at the left end of the adjustment rod 18 in FIG. The aim is to improve ease of assembly by eliminating the friction. Furthermore, the groove 18 in the guide 18a
c is provided, so that when adjusting the injection amount of the injection valve, when moving the adjustment rod 18 to adjust the set load of the spring 19, it is necessary to pull the groove 18c at the right end of the adjustment rod 18 in FIG. It becomes possible to pull it as a hanging part, and the adjustment rod 18 returns to the right in the figure due to the sliding resistance of the liquid-tight O-ring L4 between the adjustment rod 18 being adjusted and the center hole 6C of the fixed iron core 6. Other effects such as being able to eliminate the delay and shorten the injection amount adjustment time of the injection valve can also be obtained.
なお、池の構成および作動は前述した第１実施例と同様
のものである。Note that the structure and operation of the pond are similar to those in the first embodiment described above.
（発明の効果）
以上述べたように、本発明においては、ハウジング内部
に設けられた固定鉄心と、この固定鉄心と隙間を介し対
向して設けられ、固定鉄心の外周に備えられた電磁コイ
ルに電流パルスが供給されることで固定鉄心側に吸引さ
れる可動コアと、この可動コアと一体的に連結され、可
動コアの動きに応じてノズルボディ先端に形成された燃
料噴射孔を開閉するニードル弁と、前記可動コアの内部
の中心部穴に位置し、前記ニードル弁の端部と前記固定
鉄心の内部に設けられたアジャストロッドの端部とに当
接し、常時、固定鉄心と可動コアとを離間する方向に力
を発生するスプリングと、前記アジャストロッドの端部
より突出し、前記スプリングの変動を案内するガイドを
有するアジャストロッドとから構成される電磁式燃料噴
射弁としたことから、前記スプリングが前記ガイドによ
り案内されて、可動コアの固定鉄心側への吸引、離間動
作中、スプリングは可動コアの中心部での位置ずれが防
止され、中心部穴内での所定の位置を常に維持し続ける
ので、可動コアの中心部穴の壁面とスプリングとが接触
することは無く、中心部穴の壁面とスプリングとの接触
による可動部である可動コア、ニードル弁の動きへの阻
害は解消され、従って、ニードル弁の毎回の挙動は安定
したものとなり、良好な燃料噴射が常時、実行可能とな
るという優れた効果がある。 ゛式燃料
噴射弁の断面図、第２図は本発明の第２実施例の構成の
要部を示す部分断面図である。(Effects of the Invention) As described above, in the present invention, a fixed iron core provided inside a housing, and an electromagnetic coil provided on the outer periphery of the fixed iron core, which is provided facing the fixed iron core with a gap therebetween, are provided. A movable core that is attracted to the fixed iron core side when current pulses are supplied, and a needle that is integrally connected to this movable core and opens and closes the fuel injection hole formed at the tip of the nozzle body according to the movement of the movable core. The valve is located in a central hole inside the movable core, and is in contact with an end of the needle valve and an end of an adjustment rod provided inside the fixed core, so that the fixed core and the movable core are always connected. The electromagnetic fuel injection valve is composed of a spring that generates a force in the direction of separating the springs, and an adjustment rod that protrudes from the end of the adjustment rod and has a guide that guides the fluctuation of the spring. is guided by the guide, and the spring prevents the movable core from shifting its position at the center during the suction and separation operations of the movable core toward the fixed core and always maintains a predetermined position within the center hole. Therefore, the wall surface of the center hole of the movable core and the spring do not come into contact with each other, and the interference with the movement of the movable core and needle valve, which are the movable parts, due to the contact between the wall surface of the center hole and the spring is eliminated. This has the excellent effect that the behavior of the needle valve is stable every time, and good fuel injection can be performed at all times. FIG. 2 is a partial sectional view showing a main part of the structure of a second embodiment of the present invention.
■・・・ハウジング、２・・・ノズルボディ、３・・・
ニードル弁、５・・・燃料噴射孔、６・・・討定鉄心、
８・・・電磁コイル、１８・・・アジャストロッド、１
８ａ・・・ガイド、１９・・・スプリング、２０・・・
可動コア、２０ａ・・・可動コアの中心部穴。■... Housing, 2... Nozzle body, 3...
Needle valve, 5... fuel injection hole, 6... iron core,
8... Electromagnetic coil, 18... Adjustment rod, 1
8a...Guide, 19...Spring, 20...
Movable core, 20a... center hole of the movable core.
Claims (1)
心と隙間を介し対向して設けられ、固定鉄心の外周に備
えられた電磁コイルに電流パルスが供給されることで固
定鉄心側に吸引される可動コアと、 この可動コアと一体的に連結され、可動コアの動きに応
じてノズルボディ先端に形成された燃料噴射孔を開閉す
るニードル弁と、 前記可動コアの内部の中心部穴に位置し、前記ニードル
弁の端部と前記固定鉄心の内部に設けられたアジャスト
ロッドの端部とに当接し、常時、固定鉄心と可動コアと
を離間する方向に力を発生するスプリングと、 前記アジャストロッドの端部より突出し、前記スプリン
グの変動を案内するガイドを有するアジュストロッドと
から構成されることを特徴とする電磁式燃料噴射弁。[Scope of Claims] A fixed iron core is provided inside the housing, and a current pulse is supplied to an electromagnetic coil provided on the outer periphery of the fixed iron core, which is provided facing the fixed iron core with a gap therebetween. a movable core that is attracted to the side; a needle valve that is integrally connected to the movable core and opens and closes a fuel injection hole formed at the tip of the nozzle body according to the movement of the movable core; and an inner center of the movable core. a spring located in the part hole, abutting an end of the needle valve and an end of an adjustment rod provided inside the fixed core, and constantly generating a force in a direction to separate the fixed core and the movable core; and an adjust rod having a guide that protrudes from an end of the adjust rod and guides the fluctuation of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20339084A JPS6179859A (en) | 1984-09-27 | 1984-09-27 | Electromagnetic fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20339084A JPS6179859A (en) | 1984-09-27 | 1984-09-27 | Electromagnetic fuel injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6179859A true JPS6179859A (en) | 1986-04-23 |
Family
ID=16473248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20339084A Pending JPS6179859A (en) | 1984-09-27 | 1984-09-27 | Electromagnetic fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6179859A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63108565U (en) * | 1987-01-07 | 1988-07-13 | ||
| FR2616485A1 (en) * | 1987-06-09 | 1988-12-16 | Weber Srl | ATOMIZATION AND FUEL DOSING VALVE FOR A FUEL INJECTION DEVICE OF AN INTERNAL COMBUSTION ENGINE |
| JPS6441666U (en) * | 1987-09-07 | 1989-03-13 | ||
| JPH01104960A (en) * | 1987-07-21 | 1989-04-21 | Nippon Denso Co Ltd | Adjustment of injection quantity of electromagnetic type fuel injection valve |
| US4971291A (en) * | 1988-06-23 | 1990-11-20 | Weber S.R.L. | Electromagnetic fuel metering and atomizing valve |
| JPH0345464U (en) * | 1989-09-11 | 1991-04-26 | ||
| JP2010174821A (en) * | 2009-01-30 | 2010-08-12 | Denso Corp | Fuel injection valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920522A (en) * | 1972-04-24 | 1974-02-23 |
-
1984
- 1984-09-27 JP JP20339084A patent/JPS6179859A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920522A (en) * | 1972-04-24 | 1974-02-23 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63108565U (en) * | 1987-01-07 | 1988-07-13 | ||
| FR2616485A1 (en) * | 1987-06-09 | 1988-12-16 | Weber Srl | ATOMIZATION AND FUEL DOSING VALVE FOR A FUEL INJECTION DEVICE OF AN INTERNAL COMBUSTION ENGINE |
| JPH01104960A (en) * | 1987-07-21 | 1989-04-21 | Nippon Denso Co Ltd | Adjustment of injection quantity of electromagnetic type fuel injection valve |
| JPS6441666U (en) * | 1987-09-07 | 1989-03-13 | ||
| JPH059497Y2 (en) * | 1987-09-07 | 1993-03-09 | ||
| US4971291A (en) * | 1988-06-23 | 1990-11-20 | Weber S.R.L. | Electromagnetic fuel metering and atomizing valve |
| JPH0345464U (en) * | 1989-09-11 | 1991-04-26 | ||
| JP2010174821A (en) * | 2009-01-30 | 2010-08-12 | Denso Corp | Fuel injection valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3737120B2 (en) | Compact fuel injector mover valve assembly | |
| US5054691A (en) | Fuel oil injector with a floating ball as its valve unit | |
| US7051960B2 (en) | Fuel injection valve | |
| US4647008A (en) | Solenoid valve for hydraulic control | |
| US20070114299A1 (en) | Fuel injector | |
| US20080011886A1 (en) | Electromagnetic Fuel Injection Valve | |
| US7278594B2 (en) | Fuel injector | |
| US4494701A (en) | Fuel injector | |
| JPS61152960A (en) | Electromagnetic fuel injection valve | |
| JPH0531666B2 (en) | ||
| JP2014047662A (en) | Fuel injection valve | |
| JPS6179859A (en) | Electromagnetic fuel injection valve | |
| WO1990004098A1 (en) | Electromagnetic fuel injector in cartridge design | |
| WO1988004727A1 (en) | Fuel injector | |
| JPS6166860A (en) | Solenoid-operated type fuel injection valve | |
| JP2005308159A (en) | Flow characteristic control mechanism of proportional solenoid valve and flow characteristic control method using the same | |
| JP6595701B2 (en) | Fuel injection device | |
| JP6282175B2 (en) | Switchgear | |
| JPS61282686A (en) | Solenoid valve | |
| CN110651116A (en) | Ejector | |
| JPS6111450A (en) | Electromagnetic fuel injection valve | |
| JPH02190684A (en) | Solenoid valve, especially fuel injection valve for fuel injector | |
| JPS61277867A (en) | Electromagnetic type fuel injection valve | |
| JP2022142303A (en) | solenoid valve | |
| JPH01267353A (en) | Electromagnetic type fuel injection valve |