JPH05195733A - Solenoid valve - Google Patents

Abstract

PURPOSE:To provide a solenoid valve with which the magnetic resistance in the gap for installation of a moving coil in a valve driving mechanism of moving coil type is decreased. CONSTITUTION:A solenoid valve 1 is coupled below a moving coil 5, which is installed in the gaps between a columnar center magnetic pole and a left and a right magnets 41, 42. A solenoid valve concerned is driven by feeding current to this moving coil 5. In the coil 5, particulates consisting of magnetic substance are included being mixed with a plurality of conductors as winding, and thereby the magnetic resistance in the gaps is decreased to cause increase in the density of the magnetic flux from the magnets.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明はエンジンのシリンダの吸
排気口に設けられ電磁力により開閉駆動される電磁駆動
バルブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetically driven valve which is provided at an intake / exhaust port of a cylinder of an engine and is opened / closed by electromagnetic force.

【０００２】[0002]

【従来の技術】従来からシリンダに配置された吸排気バ
ルブはクランク軸の回転に基づいて駆動されるカムシャ
フトやロッカーアームなどにより機械的に開閉操作され
るが、その開閉の自由度が小さいために電磁力を用い操
作されて自由度を大きくした電磁バルブが種々開発され
ている。2. Description of the Related Art Conventionally, an intake / exhaust valve arranged in a cylinder is mechanically opened / closed by a camshaft, a rocker arm, etc. driven by the rotation of a crankshaft, but the degree of freedom of opening / closing is small. Various electromagnetic valves that have been operated with electromagnetic force and have a large degree of freedom have been developed.

【０００３】この種の電磁バルブの駆動に際しては、例
えば本出願人による提案の特開平３−１０５００６号公
報に示されたバルブのように、バルブステムに磁極を備
え、これを励磁コイルへの通電による固定磁極の磁気力
によって駆動するものがある。When driving an electromagnetic valve of this type, a magnetic pole is provided on a valve stem, and the exciting coil is energized as in the valve disclosed in Japanese Patent Laid-Open No. 3-105006 proposed by the present applicant. There are some driven by the magnetic force of the fixed magnetic pole.

【０００４】また、ダイナミックスピーカのようにセン
タ磁心に遊嵌された可動コイルにバルブステムを接続
し、可動コイルに通電して駆動するボイスコイルモータ
（ＶＣＭ）構造の電磁バルブなどが試みられている。Further, an electromagnetic valve having a voice coil motor (VCM) structure in which a valve stem is connected to a movable coil loosely fitted in a center magnetic core like a dynamic speaker and is energized to drive the movable coil has been tried. ..

【０００５】[0005]

【発明が解決しようとする課題】上述の前者のようにバ
ルブステムに重量のある磁極を複数個取付けたものでは
可動部分の重量が大となって駆動に際して不都合が生
じ、また後者のＶＣＭ構造の駆動機構を用いたものでは
センタ磁極を取巻く空隙に可動コイルを配置するが、可
動コイルの部分は磁気回路上は高い磁気抵抗を示すもの
で、十分な磁束を得るには強い励磁力を必要とするとい
う問題がある。In the case where a plurality of heavy magnetic poles are attached to the valve stem as in the former case described above, the weight of the movable part becomes large, which causes inconvenience during driving, and the latter VCM structure has a problem. In the case of using the drive mechanism, the moving coil is arranged in the air gap surrounding the center magnetic pole, but the moving coil portion has a high magnetic resistance in the magnetic circuit, and a strong excitation force is required to obtain a sufficient magnetic flux. There is a problem of doing.

【０００６】本発明はこのような問題に鑑みてなされた
ものであり、その目的は電磁バルブを駆動する部分に磁
極を設けることなく、また可動コイルの部分の磁気抵抗
を減少させて駆動に要する電力を減じようとする電磁駆
動バルブを提供することにある。The present invention has been made in view of such a problem, and an object thereof is to drive the electromagnetic valve without providing a magnetic pole in a portion for driving the electromagnetic valve and by reducing a magnetic resistance of a portion of a movable coil. It is to provide an electromagnetically driven valve that attempts to reduce power.

【０００７】[0007]

【課題を解決するための手段】上述の目的を達成するた
めに本発明によれば、円柱状の磁極とこれを囲む磁石と
の空隙に遊嵌され電磁バルブが連結された可動コイルに
電流を通じ、前記空隙の磁場との電磁力により駆動され
る電磁バルブにおいて、前記可動コイルに巻線となる導
体のほか、磁性体からなる微粒子を混在させた電磁駆動
バルブが提供される。In order to achieve the above-mentioned object, according to the present invention, an electric current is passed through a movable coil which is loosely fitted in a gap between a cylindrical magnetic pole and a magnet surrounding the magnetic pole and which is connected to an electromagnetic valve. In the electromagnetic valve driven by the electromagnetic force of the magnetic field of the air gap, there is provided an electromagnetically driven valve in which fine particles made of a magnetic material are mixed in the movable coil in addition to a conductor to be a winding.

【０００８】[0008]

【作用】円柱状の磁極とこれを囲む磁石との空隙に配置
する可動コイルに巻線となる導体の他に磁性体からなる
微粒子を混在させて空隙における磁気抵抗を減少させる
ので、空隙における磁束密度が大となって強い駆動力が
得られる。The magnetic resistance in the air gap is reduced by mixing fine particles made of a magnetic material in addition to the conductor forming the winding in the movable coil arranged in the air gap between the columnar magnetic pole and the magnet surrounding the magnetic pole. The density is high and a strong driving force can be obtained.

【０００９】[0009]

【実施例】つぎに本発明の実施例について図面を用いて
詳細に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.

【００１０】図１は本発明にかかる電磁駆動バルブの縦
断面図およびその接断線Ｉ−Ｉに沿った横断面図であ
る。FIG. 1 is a vertical sectional view of an electromagnetically driven valve according to the present invention and a horizontal sectional view taken along the line I--I.

【００１１】同図において、１は電磁バルブでそのステ
ム１１はバルブガイド１２により上下に往復自在に軸承
され、閉弁時にはシリンダの吸気口、または排気口のバ
ルブシート１３に茸弁１４が着座して流路を閉鎖するも
のである。In FIG. 1, reference numeral 1 denotes an electromagnetic valve, the stem 11 of which is vertically reciprocally supported by a valve guide 12, and when the valve is closed, a mushroom valve 14 is seated on a valve seat 13 of an intake port or an exhaust port of a cylinder. To close the flow path.

【００１２】２は外部ヨーク、３はセンタ磁極で、セン
タ磁極３の左右には所定の空隙を隔てて円筒が縦割りさ
れた形状の左磁石４１と右磁石４２とが配置され、これ
らの左右の磁石はそれぞれ外部ヨーク２の左脚部２１と
右脚部２２とに接着され、その着磁方向は例えば図示の
ように左方がＳ極、右方がＮ極とされて、センタ磁極３
を直径方向に横断する磁束を通ずるように構成されてい
る。Reference numeral 2 is an outer yoke, 3 is a center magnetic pole, and a left magnet 41 and a right magnet 42 each having a shape in which a cylinder is longitudinally divided are arranged on the left and right sides of the center magnetic pole 3 with a predetermined gap therebetween. Magnets are respectively bonded to the left leg portion 21 and the right leg portion 22 of the outer yoke 2, and the magnetization directions thereof are, for example, as shown in the figure, the left pole is the S pole and the right pole is the N pole.
Is configured to pass a magnetic flux that diametrically traverses.

【００１３】５は可動コイルで、前述の空隙に配置され
電磁バルブ１のステム１１の上方の保持具１５により取
付けられて電磁バルブ１を上下方向に駆動するもので、
閉弁位置を保持する２条の導電性のスプリング１６，１
７にリード線が接続されて通電が行われる。Reference numeral 5 denotes a movable coil which is arranged in the above-mentioned space and is attached by a holder 15 above the stem 11 of the electromagnetic valve 1 to drive the electromagnetic valve 1 in the vertical direction.
Two conductive springs 16 and 1 for holding the valve closed position
A lead wire is connected to 7 for energization.

【００１４】図２は可動コイルの外形の斜視図、図３は
その巻線部分の断面図であり、複数本の導線が集中巻さ
れた鞍型の２個のコイルが前記の空隙に対応するように
形成されたもので、上段の弧部５１および５２がセンタ
磁極３を通ずる磁束と鎖交するように構成されている。
そして、図３に示す断面図のように、巻回された導線間
には磁性体からなる微粒子５０が混在するように充填さ
れ、例えば軽量の合成樹脂やセラミックスなどが用いら
れて形成されており、したがって、磁石４１，４２によ
りセンタ磁極３を横断する磁束の通ずる空隙は、可動コ
イル５の巻線の導体のスペースに混じった磁性体の微粒
子５０によって、その磁気抵抗が減少するように構成さ
れている。FIG. 2 is a perspective view of the outer shape of the movable coil, and FIG. 3 is a cross-sectional view of the winding portion thereof. The upper arc portions 51 and 52 are configured to interlink with the magnetic flux passing through the center magnetic pole 3.
Then, as shown in the cross-sectional view of FIG. 3, fine particles 50 made of a magnetic material are mixedly filled between the wound conducting wires, and are formed by using, for example, a lightweight synthetic resin or ceramics. Therefore, the magnetic flux passing through the center magnetic pole 3 due to the magnets 41, 42 is configured so that its magnetic resistance is reduced by the fine particles 50 of the magnetic substance mixed in the space of the conductor of the winding of the movable coil 5. ing.

【００１５】つぎに、このように構成された本実施例の
作動を説明すると、可動コイル５の弧部５１，５２の配
置されている空隙は磁石４１，４２の磁力により磁束が
通じており、また可動コイル５には巻線の導体の他、磁
性体の微粒子５０が混じられているため、空隙の磁気抵
抗が減じて磁束密度が大になっている。そして、電磁バ
ルブ１の駆動に際してスプリング１６，１７を介して可
動コイル５に所定の直流を通ずると、弧部５１および５
２を流れる電流と磁気抵抗の少ない空隙の磁束との電磁
力によりフレミング左手の法則にしたがった方向、すな
わち図１の場合では下方向に可動コイル５が駆動されて
電磁バルブ１が開弁されることになる。したがって閉弁
に際しては上記と逆方向の電流を可動コイル５に通電す
ることにより、効率よく上方向に駆動されて閉弁が行わ
れる。Next, the operation of the present embodiment thus constructed will be explained. The magnetic flux of the magnets 41, 42 allows the magnetic flux to pass through the gap in which the arc portions 51, 52 of the movable coil 5 are arranged. In addition to the conductor of the winding, fine particles 50 of a magnetic material are mixed in the movable coil 5, so that the magnetic resistance of the air gap is reduced and the magnetic flux density is increased. Then, when a predetermined direct current is passed through the movable coil 5 via the springs 16 and 17 when driving the electromagnetic valve 1, the arc portions 51 and 5
The electromagnetic valve 1 opens the electromagnetic valve 1 by driving the moving coil 5 in the direction according to Fleming's left-hand rule, that is, in the downward direction in FIG. It will be. Therefore, when closing the valve, a current in the opposite direction to the above is applied to the movable coil 5 so that the moving coil 5 is efficiently driven upward to close the valve.

【００１６】[0016]

【発明の効果】上述の実施例のように本発明によれば、
円柱状のセンタ磁極とこれを挟む磁石との間の空隙に、
鞍型に形成され巻線となる複数の導体の間に磁性体を混
在させた可動コイルを配置したので、空隙の磁気抵抗が
減じて磁石による磁束密度が増加し、通電による可動コ
イルの駆動、すなわち電磁バルブの開閉が駆動電力を増
すことなく効率よく行われる効果が生ずる。According to the present invention as in the above embodiments,
In the gap between the cylindrical center magnetic pole and the magnet that sandwiches it,
Since the movable coil in which a magnetic material is mixed is arranged between a plurality of saddle-shaped winding conductors, the magnetic resistance of the air gap is reduced and the magnetic flux density of the magnet is increased. That is, there is an effect that the electromagnetic valve is efficiently opened and closed without increasing the driving power.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明にかかる電磁駆動バルブの縦断面図およ
びその切断線Ｉ−Ｉに沿った横断面図である。FIG. 1 is a vertical sectional view of an electromagnetically driven valve according to the present invention and a horizontal sectional view taken along the section line I-I.

【図２】本実施例の可動コイルの斜視図である。FIG. 2 is a perspective view of a moving coil of this embodiment.

【図３】可動コイルの断面を示す拡大図である。FIG. 3 is an enlarged view showing a cross section of a movable coil.

【符号の説明】[Explanation of symbols]

１…電磁バルブ ３…センタ磁極 ５…可動コイル ４１，４２…磁石 1 ... Electromagnetic valve 3 ... Center magnetic pole 5 ... Moving coil 41, 42 ... Magnet

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】円柱状の磁極とこれを囲む磁石との空隙に
遊嵌され電磁バルブが連結された可動コイルに電流を通
じ、前記空隙の磁場との電磁力により駆動される電磁バ
ルブにおいて、前記可動コイルに巻線となる導体のほ
か、磁性体からなる微粒子を混在させたことを特徴とす
る電磁駆動バルブ。1. An electromagnetic valve which is driven by an electromagnetic force with a magnetic field of the air gap, by passing an electric current through a movable coil which is loosely fitted in a space between a columnar magnetic pole and a magnet surrounding the magnetic pole and connected to the electromagnetic valve. An electromagnetically driven valve characterized in that, in addition to the conductor used as the winding, fine particles made of magnetic material are mixed in the moving coil.