JPH0224938Y2 - - Google Patents
Info
- Publication number
- JPH0224938Y2 JPH0224938Y2 JP1983181607U JP18160783U JPH0224938Y2 JP H0224938 Y2 JPH0224938 Y2 JP H0224938Y2 JP 1983181607 U JP1983181607 U JP 1983181607U JP 18160783 U JP18160783 U JP 18160783U JP H0224938 Y2 JPH0224938 Y2 JP H0224938Y2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- pipe
- fuel
- holding member
- magnetic material
- 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.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000000696 magnetic material Substances 0.000 claims description 8
- 238000005219 brazing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は内燃機関の電子式燃料噴射制御装置に
供する始動用の電磁式燃料噴射弁の、構造改良に
関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structural improvement of an electromagnetic fuel injection valve for starting used in an electronic fuel injection control device for an internal combustion engine.
従来の電磁式燃料噴射弁を第３図の断面図にて
示す。この種のものとしては実開昭58−81374号
公報等に示されてきており、その作動は、加圧燃
料が燃料入口継手２の中央からプランジヤ５の横
穴５ｂを通る経路で導かれており、コイル７に通
電されると発生した磁束により、保持部材４、プ
ランジヤ５及び燃料入口継手２が励磁され、プラ
ンジヤ５がスプリング６を圧縮して吸引され、燃
料が噴射通路３ａから噴射される。ここで磁性体
の保持部材４とプランジヤ５間のギヤツプGsと
なる非磁性体のパイプ３の板厚が、薄いほど、コ
イルへの最低作動電圧を低くできるプランジヤ５
の吸引力も大きくなる。しかし、ギヤツプGsを
あまりにも薄くしすぎると今度はパイプ３の強度
が不足してしまうという問題がある。
A conventional electromagnetic fuel injection valve is shown in a sectional view in FIG. This type of device has been disclosed in Japanese Utility Model Application Publication No. 58-81374, etc., and its operation is such that pressurized fuel is guided from the center of the fuel inlet joint 2 through the side hole 5b of the plunger 5. When the coil 7 is energized, the magnetic flux generated excites the holding member 4, the plunger 5, and the fuel inlet joint 2, and the plunger 5 compresses the spring 6 to be attracted, and fuel is injected from the injection passage 3a. Here, the thinner the plate thickness of the non-magnetic pipe 3 that forms the gap Gs between the magnetic holding member 4 and the plunger 5, the lower the minimum operating voltage to the coil can be.
The suction power also increases. However, if the gap Gs is made too thin, there is a problem that the strength of the pipe 3 will be insufficient.
本考案は上記問題を解消できる内燃機関の電磁
式燃料噴射弁の提供を目的とするものである。
The object of the present invention is to provide an electromagnetic fuel injection valve for an internal combustion engine that can solve the above problems.
以下本考案を図に示す実施例について説明す
る。第１図及び第２図は本考案の電磁式燃料噴射
弁の一実施例を示す断面図である。１はエンジン
の吸気管への取付板で、表面に取付穴を設けてい
る。この取付板１には磁性材料でできた燃料入口
継手２が熔接され、燃料配管を接続するネジ２ａ
が内面に切つてある。さらに燃料入口継手２の内
奥には燃料中に混在する異物を捕獲するフイルタ
１３が圧入されている。３は燃料通路となる18−
８ステンレス等非磁性体のパイプで噴射通路３ａ
の先にスワールノズル９，１０がかしめ固定され
ている。４はパイプ３の外側にロー付で接合され
た13Crステンレス等磁性材料の保持部材で、プ
ランジヤ５の位置と対応する部分にまで保持部材
４の延長部４ａを配している。プランジヤ５は磁
性材料で形成され、噴射通路３ａ閉時の油密性を
増すようなゴムのキヤツプ５ａを焼付成形し、
又、内部の燃料供給路を通つた燃料を導くための
横穴５ｂを有する。６はプランジヤ５を閉方向に
押圧するスプリング、７はパイプ３の周囲に配さ
れ、端子７ａに通電されるとプランジヤ５を励磁
するコイル、８はコイル７と保持部材４をかしめ
固定するケース、９，１０はスワールノズル、１
１は燃料入口継手２とパイプ３の間にあつて油密
を保つＯリング、１２はコイル７の端子７ａを保
護する樹脂カバーである。
The present invention will be described below with reference to embodiments shown in the drawings. 1 and 2 are cross-sectional views showing one embodiment of the electromagnetic fuel injection valve of the present invention. 1 is a mounting plate for the engine's intake pipe, with mounting holes provided on its surface. A fuel inlet joint 2 made of magnetic material is welded to this mounting plate 1, and a screw 2a for connecting the fuel pipe is welded to the mounting plate 1.
is cut on the inside. Furthermore, a filter 13 is press-fitted deep inside the fuel inlet joint 2 to capture foreign matter mixed in the fuel. 3 is the fuel passage 18−
8 Injection passage 3a with a pipe made of non-magnetic material such as stainless steel
Swirl nozzles 9 and 10 are caulked and fixed to the tips of the . Reference numeral 4 denotes a holding member made of a magnetic material such as 13Cr stainless steel and joined to the outside of the pipe 3 by brazing. The plunger 5 is made of a magnetic material, and is baked with a rubber cap 5a that increases oil tightness when the injection passage 3a is closed.
It also has a side hole 5b for guiding the fuel through the internal fuel supply path. 6 is a spring that presses the plunger 5 in the closing direction; 7 is a coil that is arranged around the pipe 3 and excites the plunger 5 when the terminal 7a is energized; 8 is a case that caulks and fixes the coil 7 and the holding member 4; 9 and 10 are swirl nozzles, 1
1 is an O-ring that is located between the fuel inlet joint 2 and the pipe 3 to maintain oil tightness, and 12 is a resin cover that protects the terminal 7a of the coil 7.
次に上記構成においてその作用を説明する。エ
ンジンを起動するとき、端子７ａからコイル７に
通電されて磁気が発出する。そして保護部材４、
プランジヤ５及び燃料入口継手２を励磁し、プラ
ンジヤ５がスプリング６の圧力と燃料圧力に打ち
勝つて、噴射通路３ａが開孔することにより、ス
ワールノズル９，１０から燃料が吸気管内へ噴射
される。このプランジヤ５を吸引する吸引力Fe
は次の式にて与えられる。すなわち空気の比透磁
率をμo、保持部材４の断面における対向面積を
Ｓ、電流値とコイル７の巻数の積つまり起磁力を
N1、パイプ３のよる側面のギヤツプをGs、そし
てプランジヤ５と燃料入口継手２間のギヤツプ
Gwとすると
Fe＝μoS（NI）2／２（Gs＋Gw）2
ここで電磁式噴射弁の性能として必要なこと
は、少ないコイル７への通電電流でいかに大きな
吸引力Feを発生できるかということである。こ
の吸引力Feは上式から明らかなようにギヤツプ
の和Gs＋Gwの２乗に反比例することから、本考
案では非磁性体のパイプ３の板厚を薄くするかわ
りに、その外側に磁性体でできた保持部材４の延
長部４ａを接合することによつて、構造強度を失
うことなくギヤツプGsを小さくしている。よつ
て吸引力Feを大きく、かつプランジヤ５の最低
作動電圧を低くすることが可能になる。 Next, the operation of the above configuration will be explained. When starting the engine, the coil 7 is energized from the terminal 7a and generates magnetism. and protective member 4,
The plunger 5 and the fuel inlet joint 2 are energized, the plunger 5 overcomes the pressure of the spring 6 and the fuel pressure, and the injection passage 3a is opened, whereby fuel is injected from the swirl nozzles 9 and 10 into the intake pipe. Suction force Fe that sucks this plunger 5
is given by the following formula. In other words, the relative magnetic permeability of air is μo, the opposing area in the cross section of the holding member 4 is S, and the product of the current value and the number of turns of the coil 7, that is, the magnetomotive force is
N1, the gap on the side where pipe 3 passes is Gs, and the gap between plunger 5 and fuel inlet joint 2.
Assuming Gw, Fe = μoS (NI) 2 / 2 (Gs + Gw) 2What is required for the performance of the electromagnetic injection valve is how large the attraction force Fe can be generated with a small amount of current flowing through the coil 7. be. As is clear from the above equation, this attractive force Fe is inversely proportional to the square of the gap sum Gs + Gw. Therefore, in the present invention, instead of reducing the thickness of the non-magnetic pipe 3, a magnetic material is formed on the outside. By joining the extended portion 4a of the holding member 4, the gap Gs can be reduced without losing structural strength. Therefore, it becomes possible to increase the attraction force Fe and lower the minimum operating voltage of the plunger 5.
なお、パイプ３と保持部材４の接合はロー付以
外に、圧入や溶接あるいは接着剤による接着でも
よい。 Note that the pipe 3 and the holding member 4 may be joined by press fitting, welding, or adhesive bonding other than brazing.
以上述べたように本考案によれば、パイプのプ
ランジヤ側の板厚を電磁コイル側の板厚より薄く
設定するとともに、パイプのプランジヤとの摺動
部の外周面を保持部材の内周面と接合することに
より、構造強度の低下を招くことなく、プランジ
ヤの最低作動電圧を低くし、吸引力を大きくする
ことができるという優れた効果がある。
As described above, according to the present invention, the plate thickness on the plunger side of the pipe is set to be thinner than the plate thickness on the electromagnetic coil side, and the outer circumferential surface of the sliding part of the pipe with the plunger is aligned with the inner circumferential surface of the holding member. Bonding has the excellent effect of lowering the minimum operating voltage of the plunger and increasing the suction force without causing a decrease in structural strength.
第１図及び第２図は本考案の電磁式燃料噴射弁
の一実施例を示す断面図、第３図は従来例の断面
図である。
２……燃料入口継手、３……パイプ、３ａ……
噴射通路、４……保持部材、４ａ……延長部、５
……プランジヤ、６……スプリング、７……コイ
ル。
1 and 2 are cross-sectional views showing one embodiment of the electromagnetic fuel injection valve of the present invention, and FIG. 3 is a cross-sectional view of a conventional example. 2... Fuel inlet joint, 3... Pipe, 3a...
Injection passage, 4... Holding member, 4a... Extension part, 5
...Plunger, 6...Spring, 7...Coil.
Claims (1)
ジヤを摺動可能に収納する非磁性体で形成された
パイプと、このパイプの外周側に配設された電磁
コイルと、前記パイプおよび電磁コイルを保持す
る磁性体で形成された保持部材とを有し、前記電
磁コイルに通電することにより前記プランジヤを
吸引して燃料を噴射する電磁弁燃料噴射弁におい
て、 前記パイプのプランジヤ側の板厚を電磁コイル
側の板厚よりも薄く設定するとともに、前記パイ
プのプランジヤとの摺動部の外周面を前記保持部
材の内周面と接合したことを特徴とする電磁式燃
料噴射弁。[Claims for Utility Model Registration] A plunger made of a magnetic material, a pipe made of a non-magnetic material that slidably accommodates the plunger, and an electromagnetic coil disposed on the outer circumferential side of the pipe, The electromagnetic fuel injection valve includes the pipe and a holding member made of a magnetic material that holds the electromagnetic coil, and injects fuel by attracting the plunger by energizing the electromagnetic coil, the plunger of the pipe The electromagnetic fuel injection is characterized in that the side plate thickness is set thinner than the electromagnetic coil side plate thickness, and the outer circumferential surface of the sliding portion of the pipe with the plunger is joined to the inner circumferential surface of the holding member. valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18160783U JPS6088071U (en) | 1983-11-24 | 1983-11-24 | electromagnetic fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18160783U JPS6088071U (en) | 1983-11-24 | 1983-11-24 | electromagnetic fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6088071U JPS6088071U (en) | 1985-06-17 |
| JPH0224938Y2 true JPH0224938Y2 (en) | 1990-07-09 |
Family
ID=30393494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18160783U Granted JPS6088071U (en) | 1983-11-24 | 1983-11-24 | electromagnetic fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088071U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2660377B2 (en) * | 1993-01-26 | 1997-10-08 | 株式会社ケーヒン | Fuel injection valve |
| JP6115032B2 (en) * | 2012-06-29 | 2017-04-19 | マツダ株式会社 | Direct injection engine fuel injection valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881374U (en) * | 1981-11-30 | 1983-06-02 | 株式会社デンソー | electromagnetic fuel injection valve |
-
1983
- 1983-11-24 JP JP18160783U patent/JPS6088071U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6088071U (en) | 1985-06-17 |
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