JPH0342286Y2 - - Google Patents

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Publication number
JPH0342286Y2
JPH0342286Y2 JP1985138975U JP13897585U JPH0342286Y2 JP H0342286 Y2 JPH0342286 Y2 JP H0342286Y2 JP 1985138975 U JP1985138975 U JP 1985138975U JP 13897585 U JP13897585 U JP 13897585U JP H0342286 Y2 JPH0342286 Y2 JP H0342286Y2
Authority
JP
Japan
Prior art keywords
valve body
valve seat
valve
porous layer
seating surface
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
Application number
JP1985138975U
Other languages
Japanese (ja)
Other versions
JPS6246871U (en
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 filed Critical
Priority to JP1985138975U priority Critical patent/JPH0342286Y2/ja
Publication of JPS6246871U publication Critical patent/JPS6246871U/ja
Application granted granted Critical
Publication of JPH0342286Y2 publication Critical patent/JPH0342286Y2/ja
Expired legal-status Critical Current

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Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、パルス巾変調により空気の流量制御
を行うのに好適な電磁弁に関し、特に弁体および
弁座の構造を改良するものである。
[Detailed description of the invention] (Field of industrial application) The present invention relates to a solenoid valve suitable for controlling the flow rate of air by pulse width modulation, and in particular improves the structure of the valve body and valve seat. .

(従来の技術) 一般に、自動車用内燃機関にあつては、吸入混
合気の空燃比制御、排気ガスの還流量制御、ある
いはアイドル回転数制御等の各種運転制御を行う
のに、その駆動手段としてパルス巾変調により制
御される電磁弁が使われている。
(Prior Art) In general, in the case of internal combustion engines for automobiles, the driving means is used to perform various operational controls such as air-fuel ratio control of the intake air-fuel mixture, exhaust gas recirculation amount control, or idle rotation speed control. A solenoid valve controlled by pulse width modulation is used.

このような電磁弁として、特公昭57−27353号
公報に開示されたものがある。
One such solenoid valve is disclosed in Japanese Patent Publication No. 57-27353.

これを第4図に基づいて説明すると、流路5は
気化器の補助エアブリードの一部を構成し、この
流路5の途中に介装された弁座7を弁体1により
開閉することで、内燃機関に吸入される混合気の
空燃比を制御するようになつている。
To explain this based on FIG. 4, the flow path 5 constitutes a part of the auxiliary air bleed of the carburetor, and the valve seat 7 interposed in the middle of this flow path 5 is opened and closed by the valve body 1. It is designed to control the air-fuel ratio of the air-fuel mixture taken into the internal combustion engine.

弁体1と弁座7はコイル2により包囲された鉄
心4と同軸上に配置され、弁体1はダイヤフラム
8を介して軸方向に移動可能に取付けられる一
方、弁座7は筒状に形成され、本体10に圧入固
定されている。
The valve body 1 and the valve seat 7 are arranged coaxially with the iron core 4 surrounded by the coil 2, and the valve body 1 is mounted so as to be movable in the axial direction via the diaphragm 8, while the valve seat 7 is formed in a cylindrical shape. and is press-fitted and fixed to the main body 10.

弁体1はリターンスプリング6により付勢され
て弁座7に着座する一方、コイル2に励磁される
鉄心4により吸着されて弁座7から離れるように
なつており、コイル2に印加されるパルス信号に
応じて弁体1を高速で往復運動させることにより
弁座7に繰り返し着座させ、パルス信号のデユー
テイ比によつてその開弁時間を調節する。
The valve body 1 is urged by a return spring 6 and seats on the valve seat 7, while it is attracted by the iron core 4 excited by the coil 2 and moves away from the valve seat 7, and the pulse applied to the coil 2 The valve body 1 is caused to reciprocate at high speed according to the signal, so as to be repeatedly seated on the valve seat 7, and its opening time is adjusted by the duty ratio of the pulse signal.

(考案が解決しようとする問題点) ところが、車両走行時に、電磁弁に導入される
外気中には、冬期に道路に散布される岩塩あるい
は海水等に含まれる硫酸塩(CaSO4,MgSO4
KzSO4)や、自動車の排気ガスに含まれるガソ
リン、軽油、エンジンオイル、および工場のボイ
ラーの排気ガスに含まれる石炭が重油が存在し、
これら硫酸塩が大気中に含まれるオイル等の有機
物と共に流路5に侵入して、弁体1あるいは弁体
7に付着することがある。
(Problem that the invention aims to solve) However, when the vehicle is running, the outside air introduced into the solenoid valve contains sulfates (CaSO 4 , MgSO 4 ,
KzSO 4 ), gasoline, diesel oil, engine oil contained in automobile exhaust gas, and coal contained in factory boiler exhaust gas, heavy oil exists,
These sulfates may enter the flow path 5 together with organic substances such as oil contained in the atmosphere and may adhere to the valve body 1 or the valve body 7.

このように硫酸塩が電磁弁内に付着した状態
で、大気中の湿度が高くなつたり、雨水等が侵入
すると、水溶性のあるMgSO4が水溶して、これ
がCaSO4と混合して乾燥すると金属との親和性が
強くなり、弁体1と弁座7とが硫酸塩を介して互
いに粘着して、電磁弁の作動不良を来すことがあ
つた。
When sulfate adheres to the inside of the solenoid valve and the atmospheric humidity increases or rainwater enters, the water-soluble MgSO 4 dissolves in water, mixes with CaSO 4 and dries. The affinity with metals became strong, and the valve body 1 and valve seat 7 sometimes stuck to each other via the sulfate, resulting in malfunction of the solenoid valve.

本考案は、上記したように大気中のダストに含
まれる硫酸塩による弁体と弁座間の粘着を回避す
る構造を提供することを目的とする。
The present invention aims to provide a structure that avoids sticking between a valve body and a valve seat due to sulfate contained in dust in the atmosphere as described above.

(問題点を解決するための手段) 本考案は、印加されるパルス信号に応じてコイ
ルに生じる電磁力により高速往復運動する弁体
と、この弁体が繰り返し着座する弁座を備えた電
磁弁において、前記弁体にゴム材を取付けると共
に、前記弁座の金属製着座面に多孔質層を形成
し、この多孔質層にテフロン(商品名)等のフツ
素樹脂を含浸コーテイングする。
(Means for solving the problem) The present invention is a solenoid valve that includes a valve body that reciprocates at high speed due to electromagnetic force generated in a coil in response to an applied pulse signal, and a valve seat on which this valve body repeatedly seats. In this step, a rubber material is attached to the valve body, a porous layer is formed on the metal seating surface of the valve seat, and this porous layer is impregnated and coated with a fluororesin such as Teflon (trade name).

各着座面に形成したテフロン樹脂およびゴム材
は、硫酸塩に対して親和性が少ないため、弁体と
弁座間の粘着を回避できる。
Since the Teflon resin and rubber material formed on each seating surface have a low affinity for sulfates, sticking between the valve body and the valve seat can be avoided.

また、テフロン樹脂は金属表面に形成された多
孔質層に含浸コーテイングするようにしたため、
高速で往復運動を繰り返して互いに衝突する弁体
と弁座においても、金属母材からテフロン樹脂が
剥離することを防止して、十分な耐久性が得られ
るのである。
In addition, since Teflon resin is impregnated and coated on the porous layer formed on the metal surface,
Even when the valve body and valve seat repeatedly move back and forth at high speed and collide with each other, sufficient durability can be achieved by preventing the Teflon resin from peeling off from the metal base material.

(実施例) 以下、本考案の一実施例を添付図面に基づいて
説明する。なお、従来例と同一構成部には同一符
号を付す。
(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings. Note that the same reference numerals are given to the same components as in the conventional example.

第1図に示すように、弁体1の弁座7に着座す
る側面には凹部11を形成し、この凹部11にフ
ツソゴム12を加硫焼き付けして、環状に突出す
る着座面13を形成する。
As shown in FIG. 1, a recess 11 is formed on the side surface of the valve body 1 that is seated on the valve seat 7, and a vulcanized rubber 12 is baked into this recess 11 to form a seating surface 13 that protrudes in an annular shape. .

弁座7はアルミ材により環状に形成し、第2図
に示すように、弁座7の弁体1を着座させる着座
面15にはアルマイト処理を施して、その表面に
多孔質層20を形成し、この多孔質層20にテフ
ロン樹脂21を含浸コーテイングし、さらにこの
テフロン樹脂21の表面を平らに加工する。
The valve seat 7 is formed in an annular shape from an aluminum material, and as shown in FIG. 2, the seating surface 15 of the valve seat 7 on which the valve body 1 is seated is anodized, and a porous layer 20 is formed on the surface. Then, this porous layer 20 is impregnated and coated with Teflon resin 21, and the surface of this Teflon resin 21 is further processed to be flat.

なお、弁座7を鉄により形成した場合は、その
着座面15にニツケルメツキを施して、多孔質層
20を形成する。
In addition, when the valve seat 7 is formed of iron, the seating surface 15 is nickel plated to form the porous layer 20.

このように弁座7の着座面15はテフロン樹脂
21により形成され、かつ弁体1の着座面13は
フツソゴム12により形成されているため、大気
中に含まれる硫酸塩や水分が流路5を通つて電磁
弁内に侵入した場合、水溶乾燥してMgSO4が再
結晶しても、フツソゴム12あるいはテフロン樹
脂21との親和性が少ないため、弁体1と弁座7
とが互いに粘着し合うことを回避できる。
In this way, the seating surface 15 of the valve seat 7 is formed of Teflon resin 21, and the seating surface 13 of the valve body 1 is formed of the rubber 12, so that sulfates and moisture contained in the atmosphere can pass through the flow path 5. If MgSO 4 enters the solenoid valve through the water, even if it dries in water and recrystallizes, it has little affinity with the rubber 12 or the Teflon resin 21, so the valve body 1 and valve seat 7
It is possible to avoid sticking together.

第3図に示す表は、弁体1および弁座7の各着
座面13,15を共にステンレス材とする従来の
構造と、本考案による各着座面13,15をフツ
ソゴム12とテフロン樹脂21とするものについ
て、CaSO4,MgSO4,CaSO4+MgSO4をそれぞ
れ水に混合したものを各着座面13,15に塗布
して、弁体1と弁座7の間に働く粘着力を測定し
た実験結果であるが、従来例に比べて本考案によ
るものは粘着力がほとんど発生しないことが確認
できる。
The table shown in FIG. 3 shows a conventional structure in which the seating surfaces 13 and 15 of the valve body 1 and the valve seat 7 are both made of stainless steel, and a structure in which the seating surfaces 13 and 15 of the present invention are made of soft rubber 12 and Teflon resin 21. An experiment in which a mixture of CaSO 4 , MgSO 4 , and CaSO 4 +MgSO 4 was applied to each seating surface 13 and 15 to measure the adhesive force acting between the valve body 1 and the valve seat 7. As a result, it can be confirmed that the adhesive according to the present invention generates almost no adhesive force compared to the conventional example.

また、フツソゴム12自体も粘着性を有してい
るが、このフツソゴム12による粘着はテフロン
樹脂21に対して軽微であり、弁体1の作動に影
響を与えるものではない。なお、このフツソゴム
12の軽微な粘着力を除くため、フツソゴム12
の表面にもテフロン樹脂をコーテイングするか、
あるいはタルクを被着することも考えられる。
In addition, although the rubber 12 itself has adhesiveness, the adhesiveness of the rubber 12 is slight to the Teflon resin 21 and does not affect the operation of the valve body 1. In addition, in order to remove the slight adhesive force of this soft rubber 12,
Coating the surface with Teflon resin or
Alternatively, it is also possible to apply talc.

また、従来から作動音の低減をはかるために、
弁体あるいは弁座にゴム材を加硫焼き付けして、
ゴム材の粘性によりゴム材の表面にテフロン樹脂
をコーテイングしたものがあるが、これは弁体が
高速で往復運動して弁座に当接する作動が繰り返
されると、ゴム材が柔らかいために、テフロン樹
脂が割れてゴム材から剥離しやすかつた。
In addition, in order to reduce operating noise,
Rubber material is vulcanized and baked on the valve body or valve seat.
Due to the viscosity of the rubber material, some products have Teflon resin coated on the surface of the rubber material. The resin cracked and was easily peeled off from the rubber material.

これに対して、本考案では金属母材の表面に多
孔質層20を形成する処理(ポーラス)を施し、
その上にテフロン樹脂21を含浸コーテイングし
て平らな着座面15を形成するようにしたため、
弁体1と弁座7の当接が繰り返されても、テフロ
ン樹脂21が剥離することを防止できる。
In contrast, in the present invention, a process (porous) is performed to form a porous layer 20 on the surface of the metal base material,
Since a flat seating surface 15 is formed by impregnating and coating Teflon resin 21 on it,
Even if the valve body 1 and the valve seat 7 are brought into contact repeatedly, the Teflon resin 21 can be prevented from peeling off.

(考案の効果) 以上のように本考案は、コイルにより弁体を高
速往復運動させて弁座に繰り返し当接させる電磁
弁において、その弁体にゴム材を取り付けると共
に、金属製弁座に形成した多孔質層にテフロン等
のフツ素樹脂を含浸コーテイングしたので、フツ
素樹脂が弁座の金属母材から剥離するのを防止し
て優れた耐久性が得られると共に、このフツ素樹
脂及びゴム材が大気中のダストに含まれる硫酸塩
に親和性が少ないことから、弁体と弁座が互いに
粘着しあうことを回避して電磁弁の安定した動作
が維持され、ひいては内燃機関の各種運転制御の
信頼性を高められるという効果が得られる。
(Effects of the invention) As described above, the present invention is a solenoid valve in which the valve body is moved back and forth at high speed by a coil and repeatedly contacts the valve seat. The porous layer is impregnated and coated with a fluororesin such as Teflon, which prevents the fluororesin from peeling off from the metal base material of the valve seat and provides excellent durability. Since the material has a low affinity for sulfates contained in dust in the atmosphere, stable operation of the solenoid valve is maintained by preventing the valve body and valve seat from sticking to each other, which in turn improves various operations of the internal combustion engine. This has the effect of increasing the reliability of control.

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

第1図は本考案の一実施例を示す断面図、第2
図は同じく要部拡大図であり、第3図は実験結果
を示す表である。第4図は従来例を示す電磁弁の
断面図である。 1……弁体、5……流路、7……弁体、13…
…着座面、12……フツソゴム、15……着座
面、20……多孔質層、21……テフロン樹脂。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is also an enlarged view of the main part, and FIG. 3 is a table showing the experimental results. FIG. 4 is a sectional view of a conventional solenoid valve. 1... Valve body, 5... Channel, 7... Valve body, 13...
...Seating surface, 12...Futsuso rubber, 15...Seating surface, 20...Porous layer, 21...Teflon resin.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 印加されるパルス信号に応じてコイルに生じる
電磁力により高速往復運動する弁体と、この弁体
が繰り返し着座する弁座を備えた電磁弁におい
て、前記弁体にゴム材を取付けると共に、前記弁
座の金属製着座面に多孔質層を形成し、この多孔
質層にフツ素樹脂を含浸コーテイングしたことを
特徴とする電磁弁。
A solenoid valve includes a valve body that reciprocates at high speed due to an electromagnetic force generated in a coil in response to an applied pulse signal, and a valve seat on which the valve body repeatedly seats. A solenoid valve characterized in that a porous layer is formed on a metal seating surface of a seat, and the porous layer is impregnated and coated with a fluororesin.
JP1985138975U 1985-09-11 1985-09-11 Expired JPH0342286Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985138975U JPH0342286Y2 (en) 1985-09-11 1985-09-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985138975U JPH0342286Y2 (en) 1985-09-11 1985-09-11

Publications (2)

Publication Number Publication Date
JPS6246871U JPS6246871U (en) 1987-03-23
JPH0342286Y2 true JPH0342286Y2 (en) 1991-09-04

Family

ID=31044449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985138975U Expired JPH0342286Y2 (en) 1985-09-11 1985-09-11

Country Status (1)

Country Link
JP (1) JPH0342286Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024135731A1 (en) * 2022-12-23 2024-06-27 株式会社不二工機 Solenoid valve and expansion valve with solenoid valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2730912B2 (en) * 1988-07-06 1998-03-25 三洋電機株式会社 Hot water solenoid valve
JP2006258283A (en) * 2005-02-18 2006-09-28 Denso Corp Fluid control valve and solenoid valve
JP4268604B2 (en) * 2005-08-04 2009-05-27 愛三工業株式会社 solenoid valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737167U (en) * 1980-08-13 1982-02-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024135731A1 (en) * 2022-12-23 2024-06-27 株式会社不二工機 Solenoid valve and expansion valve with solenoid valve

Also Published As

Publication number Publication date
JPS6246871U (en) 1987-03-23

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