JPS618464A - Electromagnetic fuel injection valve - Google Patents
Electromagnetic fuel injection valveInfo
- Publication number
- JPS618464A JPS618464A JP59129359A JP12935984A JPS618464A JP S618464 A JPS618464 A JP S618464A JP 59129359 A JP59129359 A JP 59129359A JP 12935984 A JP12935984 A JP 12935984A JP S618464 A JPS618464 A JP S618464A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- fuel
- core
- fuel injection
- injection 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.)
- Granted
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
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
- F02M51/0646—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being a short body, e.g. sphere or cube
- F02M51/065—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being a short body, e.g. sphere or cube the valve being spherical or partly spherical
-
- 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
- F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、電磁式燃料噴射弁の改良に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in an electromagnetic fuel injection valve.
電磁式燃料噴射弁の動作は、大略、電磁コイルへの通電
によって可動鉄心を固定鉄心側に吸引し、可動鉄心に取
り付けられている弁体をリフトさせることによシ、燃料
噴射ノズルへの燃料通路を開底、二／ジンに燃料を噴射
するというものである。The operation of an electromagnetic fuel injection valve is generally to draw the movable core toward the fixed core by energizing the electromagnetic coil, and lift the valve body attached to the movable core, thereby injecting fuel into the fuel injection nozzle. The passage is opened at the bottom and fuel is injected into the second engine.
上記した燃料噴射弁の動作を得るため、従来一般にあっ
ては、弁体をニードル弁とし、ノズルボディ内に上記ニ
ードル弁を傾斜しない状態でセットするようにしている
。In order to obtain the above-described operation of the fuel injection valve, conventionally, the valve body is generally a needle valve, and the needle valve is set in the nozzle body in a non-inclined state.
しかしながら、弁体にニードル弁を使用する電磁式燃料
噴射弁にあっては、当該ニードル弁の正常な動作を得る
ために、ニードル弁ならびにこれをガイドするノズルボ
ディに高精度な機械加工が要求され、また閉弁時の燃料
洩れを防止するために、ニードル弁の弁部ならびにこれ
によって開閉される弁座にも高精度な機械加工が要求さ
れる。However, in electromagnetic fuel injection valves that use a needle valve as the valve body, high-precision machining is required for the needle valve and the nozzle body that guides it in order to ensure normal operation of the needle valve. Furthermore, in order to prevent fuel leakage when the valve is closed, highly accurate machining is required for the valve portion of the needle valve and the valve seat that is opened and closed by the needle valve.
さらに、弁体にニードル弁を使用する電磁式燃料噴射弁
にあっては、当該ニードル弁の傾斜を防止する目的で、
ニードル弁の長さを長くする必要があるが、ニードル弁
の長さを長くするということは、可動鉄心を含めた可動
体の重量化にりながシ、可動体の重量化は、燃料噴射量
の直線性を損なう要因となり、電磁式燃料噴射弁のダイ
ナミックレンジの拡大に障害となる。Furthermore, in electromagnetic fuel injection valves that use a needle valve as the valve body, in order to prevent the needle valve from tilting,
It is necessary to increase the length of the needle valve, but increasing the length of the needle valve means increasing the weight of the movable body including the movable iron core, and increasing the weight of the movable body will increase the amount of fuel injection. This impairs the linearity of the electromagnetic fuel injection valve, and becomes an obstacle to expanding the dynamic range of the electromagnetic fuel injection valve.
弁体にニードル弁を使用する電磁式燃料噴射弁に対し、
可動体重量の軽減化を図った電磁式燃料噴射弁（特開昭
５７−１９５８５８号公報）が先に開発されている。そ
の構成を第２図に示す。For electromagnetic fuel injection valves that use a needle valve as the valve body,
An electromagnetic fuel injection valve (Japanese Unexamined Patent Publication No. 195858/1983) was developed earlier, which aims to reduce the movable weight. Its configuration is shown in FIG.
第２図において、燃料噴射弁１は、弁体の外周面を球面
状としたボールパルプ２と、円板状の可動鉄心３とから
なる。磁気回路は、コイル組立体５を含むコア４、ヨー
ク６、ストッパ７、可動鉄心３とによ２て形成される。In FIG. 2, the fuel injection valve 1 consists of a ball pulp 2 whose outer circumferential surface of the valve body is spherical, and a disk-shaped movable iron core 3. The magnetic circuit is formed by a core 4 including a coil assembly 5, a yoke 6, a stopper 7, and a movable iron core 3.
コイル組立体５に電流を印加すると、可動鉄心３は、ス
トッパ７に当るまでコア４の方向に吸引されるものであ
って、このときコア４と可動鉄心３との間には、可動体
の閉弁遅れ時間を決定する成る一定のエアギャップが形
成されている。When a current is applied to the coil assembly 5, the movable core 3 is attracted in the direction of the core 4 until it hits the stopper 7, and at this time, there is a gap between the core 4 and the movable core 3. A constant air gap is formed which determines the valve closing delay time.
燃料は、ヨーク６の側面に設けられている燃料入口通路
８から燃料噴射弁ｌ内に入り、ヨーク６とコイル組立体
５との間に形成された環状隙間を経て可動鉄心３の燃料
入口孔９に至シ、燃料室１０に到達するっその後、燃料
は、バルブシート１１に設けられた燃料通路１２を経て
、ボールパルプ２とバルブシー）１１にｊ−）て形成さ
れている燃料計量部に至り、可動体の開弁動作にもとづ
いて、スワールオリフィス１３に流入する。スワールオ
リフィス１３には、上記燃料計量部で計量された燃料に
旋回を与えるための斜め孔が複数個設けられており、ス
ワールオリフィス１３から流出した燃料旋回流は、燃料
噴射ノズル１４を通ってエンジンに供給される。Fuel enters the fuel injection valve l from a fuel inlet passage 8 provided on the side surface of the yoke 6, passes through an annular gap formed between the yoke 6 and the coil assembly 5, and enters the fuel inlet hole of the movable iron core 3. After reaching the fuel chamber 10, the fuel passes through the fuel passage 12 provided in the valve seat 11 and enters the fuel metering section formed by the ball pulp 2 and the valve seat 11. Then, it flows into the swirl orifice 13 based on the valve opening operation of the movable body. The swirl orifice 13 is provided with a plurality of diagonal holes for swirling the fuel metered by the fuel metering section, and the swirling flow of fuel flowing out from the swirl orifice 13 passes through the fuel injection nozzle 14 to the engine. supplied to
エンジンに供給されない燃料は、ボールパルプ２の燃料
リターン孔１５、リターンスプリング１６、コア４とス
プリングアジャスタ１７との間の環状隙間、コア４に設
けられている燃料出口孔１８、燃料リターン通路１９を
通って燃料出口通路２０からリターンされる。Fuel that is not supplied to the engine is supplied through the fuel return hole 15 of the ball pulp 2, the return spring 16, the annular gap between the core 4 and the spring adjuster 17, the fuel outlet hole 18 provided in the core 4, and the fuel return passage 19. and is returned from the fuel outlet passage 20.
ところで、上記した電磁式燃料噴射弁にあっては、コア
４とヨーク６との加締位置を、ヨーク６とインジェクタ
ホルダ２１との間に介装されているシール部材２２を基
準にして、燃料噴射ノズル１４と反対側に位置せしめる
構造を採用しているため、コア４とコイル組立体５、コ
イル組立体５とヨーク６との間からの燃料洩れを、それ
ぞれ０リング２３と２４で防止するようにしていた。By the way, in the above-mentioned electromagnetic fuel injection valve, the tightening position of the core 4 and the yoke 6 is determined based on the sealing member 22 interposed between the yoke 6 and the injector holder 21. Since a structure is adopted in which the fuel injection nozzle is located on the opposite side from the injection nozzle 14, fuel leakage from between the core 4 and the coil assembly 5, and between the coil assembly 5 and the yoke 6 is prevented by the O-rings 23 and 24, respectively. That's what I was doing.
しかしながら、ヨーク６の上方からコイル組立体５を挿
入し、さらにコア４を組込むに際し、上記一方の０１Ｊ
ング２４はヨーク６と大きな接触面積を有し、他方のＯ
リング２３もコア４と大きな接触面積を有するため、燃
料噴射弁ｌの組立作業時、０リング２３あるいは２４に
傷がつくおそれがあり、斯かる場合、燃料のシール性を
十分に満足することができなくなる。また、ヨーク６に
対してコイル組立体５を組み込んだ後、コア４とヨーク
６とを加締めるに際し、シール部材２２を保持する部位
のヨーク外径が膨らみ、シール部材保持用の溝寸法に狂
いを生じることがある。However, when inserting the coil assembly 5 from above the yoke 6 and further incorporating the core 4, one of the above 01J
The ring 24 has a large contact area with the yoke 6, and the other O
Since the ring 23 also has a large contact area with the core 4, there is a risk that the O-ring 23 or 24 may be damaged during the assembly work of the fuel injector l. become unable. In addition, when the core 4 and the yoke 6 are tightened after the coil assembly 5 is assembled into the yoke 6, the outer diameter of the yoke at the portion that holds the seal member 22 expands, and the groove size for holding the seal member is out of alignment. may occur.
本発明は、以上の点を考慮してなされたものであって、
その目的とするところは、従来よりも燃料シール性にす
ぐれ、しかもコアとヨークとの加締作業に際し、シール
部材を保持する部位のヨーク外径が膨らむことなく、シ
タがってシール部材保持用の溝寸法に狂いを生じること
のない、機器の信頼性、作業性共にすぐれた、改良され
た電磁式燃料噴射弁を提供しようとするものである。The present invention has been made in consideration of the above points, and includes:
The purpose of this is to provide better fuel sealing performance than before, and also to prevent the outer diameter of the yoke in the area that holds the seal member from expanding when tightening the core and yoke, allowing it to be used to hold the seal member. The purpose of the present invention is to provide an improved electromagnetic fuel injection valve that does not cause deviations in groove dimensions and has excellent equipment reliability and workability.
上記目的を達成するため、本発明は、コアとヨークを備
える噴射弁本体の内部に、電磁コイルと固定鉄心とを含
むコイル組立体を取り付け、上記噴射弁本体内に位置す
るコイル組立体の側面に燃料入口通路と燃料出口通路と
を設け、燃料室の先端に燃料噴射ノズルを装着するとと
もに、ヨーク −とインジェクタホルダとの間に
シール部材を介装する構造の電磁式燃料噴射弁において
、上記コアとヨークとの加締位置を、ヨークとインジェ
クタホルダとの間に介装されているシール部材を基準ビ
して、燃料噴射ノズル側に位置せしめてなるととを特徴
とするものである。In order to achieve the above object, the present invention includes a coil assembly including an electromagnetic coil and a fixed iron core installed inside an injection valve body including a core and a yoke, and a side surface of the coil assembly located inside the injection valve body. In an electromagnetic fuel injection valve having a structure in which a fuel inlet passage and a fuel outlet passage are provided in the fuel chamber, a fuel injection nozzle is attached to the tip of the fuel chamber, and a sealing member is interposed between the yoke and the injector holder. The crimping position of the core and yoke is located on the fuel injection nozzle side with reference to a seal member interposed between the yoke and the injector holder.
以下、本発明を、第１図の一実施例にもとづいて説明す
る。The present invention will be explained below based on an embodiment shown in FIG.
第１図において、第２図と同一符号は同一部分を示し、
燃料供給系の構成は第２図の場合と同様であり、本発明
においては、コア４とヨ〜り６との加締位置を、ヨーク
６とインジェクタホルダ２１との間に介装されているシ
ール部材２２を基準にして、燃料噴射ノズル１４側に位
置せしめてなること要旨とするものである。In FIG. 1, the same symbols as in FIG. 2 indicate the same parts,
The configuration of the fuel supply system is the same as that shown in FIG. The gist is that the sealing member 22 is located on the side of the fuel injection nozzle 14 with respect to the sealing member 22.
本発明は以上のごとき構成よりなり、本発明において、
燃料噴射弁１を組み立てるには、まず、コア４とヨーク
６との一体化→ストッパ７の仮組込→コア４の端面とス
トッパ７の端面間のニアギャップ測定→コア４の端面研
磨によるエアギャップの調整→切粉除去→コイル組立体
５の組込がおこなわれるものであって、それ以降は、第
１図に示す電磁式燃料噴射弁の組立工程と同一の手順に
よって組み立てられる。The present invention has the above configuration, and in the present invention,
To assemble the fuel injection valve 1, first, the core 4 and the yoke 6 are integrated → the stopper 7 is temporarily assembled → the near gap measurement between the end face of the core 4 and the end face of the stopper 7 → the end face of the core 4 is polished by air Gap adjustment→removal of chips→installation of the coil assembly 5 are performed, and the subsequent steps are the same as those for assembling the electromagnetic fuel injection valve shown in FIG.
しかして、本発明においては、第１図に示す従来例と異
なり、コア４とヨーク６との加締位置を、ヨーク６とイ
ンジェクタホルダ２１との間に介装されているシール部
材２２を基準にして、燃料噴射ノズル１４側に位置せし
めたことにより、コア４とコイル組立体５との間からの
燃料洩れは、ターミナル２５の外周にほどこしたＯリン
グ２６をもって防止することができ、コイル組立体５と
ヨーク６との間からの燃料洩れは、ヨーク６とインジェ
クタホルダ２１との間に介装されているシール部材２２
に負担させることができ、０リング２６とコア４との接
触面積は小さり、シたかりてターミナル２５と一体に構
成されているコイル組立体５のコア４への組込は容易に
おこなわれるものであるから、燃料噴射弁１の組立作業
時、Ｏリング２６に傷がつく不具合は殆どなくなる。ま
た、上記構成よ）なる本発明によれば、コア４とヨーク
６とを加締める場合、そめ加締部に対してシール部材２
２の保持位置を離れた位置とすることができるため、シ
ール部材２２を保持する部位のヨーク外径が膨らみ、シ
ール部材保持用の溝寸法に狂いを生じるといった問題も
同時に解決される。Therefore, in the present invention, unlike the conventional example shown in FIG. By locating it on the side of the fuel injection nozzle 14, fuel leakage between the core 4 and the coil assembly 5 can be prevented by the O-ring 26 placed around the outer periphery of the terminal 25. Fuel leakage from between the solid body 5 and the yoke 6 is prevented by a sealing member 22 interposed between the yoke 6 and the injector holder 21.
The contact area between the O-ring 26 and the core 4 is small, and therefore the coil assembly 5, which is integrated with the terminal 25, can be easily assembled into the core 4. Therefore, during the assembly work of the fuel injection valve 1, the problem of damage to the O-ring 26 is almost eliminated. Furthermore, according to the present invention having the above configuration, when the core 4 and the yoke 6 are crimped, the sealing member 2 is attached to the side crimped portion.
Since the second holding position can be set at a separate position, the problem that the outer diameter of the yoke at the portion holding the seal member 22 expands and the groove size for holding the seal member becomes irregular is also solved at the same time.
なお、本発明においては、コア４とヨーク６との加締位
置を、ヨーク６とインジェクタホルダ２２１との間に介
装されているシール部材２２を基準にして、燃料噴射ノ
ズル１４側に位置せしめたことにより、コア４の端面と
ストッパ７の端面間のエアギャップ調整に際し、コア４
の端面を研磨することができるものであるが、その際、
研磨加工面の加工変質層が加工代によってばらつくこと
がある。しかしながら、コア４の端面を研磨してエアギ
ャップの調整をおこなう場合は、ストッパ７の端面を研
磨してエアギャップの調整をおこなっていた従来に比べ
、磁路を形成する面積が約１１５程度小さくなるため、
エアギャップ調整時における加工変質層のばらつきは、
従来よりも少なくて済む。In addition, in the present invention, the caulking position of the core 4 and the yoke 6 is located on the fuel injection nozzle 14 side with reference to the seal member 22 interposed between the yoke 6 and the injector holder 221. As a result, when adjusting the air gap between the end face of the core 4 and the end face of the stopper 7, the core 4
It is possible to polish the end face of the
The process-affected layer on the polished surface may vary depending on the processing allowance. However, when adjusting the air gap by polishing the end face of the core 4, the area for forming the magnetic path is approximately 115 smaller than in the past, in which the air gap was adjusted by polishing the end face of the stopper 7. To become
The variation in the processed damaged layer when adjusting the air gap is
It requires less than the conventional method.
以上、本発明によれば、従来よりも燃料シール性にすぐ
ｎ、しかもコアとヨークとの加締作業に際し、シール部
材を保持する部位のヨーク外径が膨らむことなく、シた
がってシール部材保持用の溝寸法に狂いを生じることの
ない、機器の信頼性、作業性共にすぐれた、改良された
電磁式燃料噴射弁を得ることができる。As described above, according to the present invention, the fuel sealing performance is improved better than before, and when the core and the yoke are tightened, the outer diameter of the yoke at the part that holds the seal member does not swell, and therefore the seal member is held. It is possible to obtain an improved electromagnetic fuel injection valve that does not cause deviation in groove dimensions and has excellent equipment reliability and workability.
第１図は本発明に係る電磁式燃料噴射弁の一実施例を示
す内部構造の縦断面図、第２図は従来提案されている電
磁式燃料噴射弁の内部構造を示す縦断面図である。
１・・・燃料噴射弁、２・・・ボールパルプ、３・・・
可動鉄心、４・・・コア、５・・・コイル組立体、６・
・・ヨーク、７・・・ストッパ、８・・・燃料入口通路
、９・・・燃料入口孔、１０・・・燃料室、１１・・・
バルブシート、１２・・・燃料通路、１３・・・スワー
ルオリフィス、１４・・・燃料噴射ノズル、１５・・・
燃料リターン孔、１６・・・リターンスプリング、１７
・・・スプリングアジャスタ、１８・・・燃料出口通路
、１９・・・燃料リターン通路、２０・・・燃料出口通
路、２１・・・インジェクタホルダ、２２・・・シール
部材、２５・・・ターミナル、２６・・・０不 １ 図
不 ２ 図FIG. 1 is a longitudinal sectional view of the internal structure of an embodiment of the electromagnetic fuel injection valve according to the present invention, and FIG. 2 is a longitudinal sectional view of the internal structure of a conventionally proposed electromagnetic fuel injection valve. . 1...Fuel injection valve, 2...Ball pulp, 3...
Movable iron core, 4... Core, 5... Coil assembly, 6.
...Yoke, 7...Stopper, 8...Fuel inlet passage, 9...Fuel inlet hole, 10...Fuel chamber, 11...
Valve seat, 12...Fuel passage, 13...Swirl orifice, 14...Fuel injection nozzle, 15...
Fuel return hole, 16...Return spring, 17
Spring adjuster, 18 Fuel outlet passage, 19 Fuel return passage, 20 Fuel outlet passage, 21 Injector holder, 22 Seal member, 25 Terminal, 26...0 no 1 no figure 2 figure
Claims (1)
コイルと固定鉄心とを含むコイル組立体を取り付け、上
記噴射弁本体内に位置するコイル組立体の側面に燃料入
口通路と燃料出口通路とを設け、燃料室の先端に燃料噴
射ノズルを装着するとともに、ヨークとインジェクタホ
ルダとの間にシール部材を介装する構造の電磁式燃料噴
射弁において、上記コアとヨークとの加締位置を、ヨー
クとインジェクタホルダとの間に介装されているシール
部材を基準にして、燃料噴射ノズル側に位置せしめてな
ることを特徴とする電磁式燃料噴射弁。1. A coil assembly including an electromagnetic coil and a fixed iron core is installed inside an injection valve body including a core and a yoke, and a fuel inlet passage and a fuel outlet passage are provided on the side of the coil assembly located in the injection valve body. In an electromagnetic fuel injection valve having a structure in which a fuel injection nozzle is installed at the tip of the fuel chamber and a sealing member is interposed between the yoke and the injector holder, the tightening position of the core and the yoke is determined. An electromagnetic fuel injection valve, characterized in that it is located on the fuel injection nozzle side with reference to a sealing member interposed between a yoke and an injector holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59129359A JPS618464A (en) | 1984-06-25 | 1984-06-25 | Electromagnetic fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59129359A JPS618464A (en) | 1984-06-25 | 1984-06-25 | Electromagnetic fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS618464A true JPS618464A (en) | 1986-01-16 |
| JPH0256509B2 JPH0256509B2 (en) | 1990-11-30 |
Family
ID=15007640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59129359A Granted JPS618464A (en) | 1984-06-25 | 1984-06-25 | Electromagnetic fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS618464A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195858A (en) * | 1981-05-13 | 1982-12-01 | Bosch Gmbh Robert | Electromagnetic valve |
| JPS58162759A (en) * | 1982-03-05 | 1983-09-27 | ロ−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 | Electromagnetically workable valve |
-
1984
- 1984-06-25 JP JP59129359A patent/JPS618464A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195858A (en) * | 1981-05-13 | 1982-12-01 | Bosch Gmbh Robert | Electromagnetic valve |
| JPS58162759A (en) * | 1982-03-05 | 1983-09-27 | ロ−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 | Electromagnetically workable valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0256509B2 (en) | 1990-11-30 |
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