JPH05296012A - Solenoid driving valve - Google Patents
Solenoid driving valveInfo
- Publication number
- JPH05296012A JPH05296012A JP4122564A JP12256492A JPH05296012A JP H05296012 A JPH05296012 A JP H05296012A JP 4122564 A JP4122564 A JP 4122564A JP 12256492 A JP12256492 A JP 12256492A JP H05296012 A JPH05296012 A JP H05296012A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic flux
- movable coil
- current
- magnetic
- permanent magnet
- 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
Landscapes
- Valve Device For Special Equipments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はシリンダの吸排気口に配
置され、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 arranged at an intake / exhaust port of a cylinder and is opened / closed by an 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くタイミングベルトなど
を介し機械的に駆動されて吸排気口の開閉を行っている
が、その開閉の自由度が小さいために電磁力を利用し機
械的の関係を無くした電磁バルブが開発されている。2. Description of the Related Art Conventionally, an intake / exhaust valve arranged in a cylinder is mechanically driven via a timing belt or the like based on the rotation of a crankshaft to open / close an intake / exhaust port. Due to its small size, electromagnetic valves have been developed that utilize electromagnetic force to eliminate mechanical relationships.
【０００３】そして、この種の電磁バルブには、例えば
強力な磁界を有する空隙に可動コイルを配置し、該可動
コイルへの通電を制御して可動コイルを往復作動させ、
吸排気バルブを駆動するボイスコイルモータ型の駆動機
構がある。In this type of electromagnetic valve, for example, a moving coil is arranged in a gap having a strong magnetic field, and the energization of the moving coil is controlled to reciprocate the moving coil.
There is a voice coil motor type drive mechanism that drives intake and exhaust valves.
【０００４】[0004]
【発明が解決しようとする課題】上述のような駆動機構
では、往復の駆動に際し転流により逆起電力を生じ、電
流を断続する部分に火花を生じてブラシなどの寿命の低
下を招くため、界磁による磁束密度に併せ電気中性点を
移動し、良好な転流を得るなどの対策がとられている
が、界磁が永久磁石の場合には起磁力の制御が不能のた
め、このような対策が行えないという問題がある。In the drive mechanism as described above, a counter electromotive force is generated by commutation during reciprocating driving, and sparks are generated at a portion where the current is interrupted, leading to a reduction in the life of the brush or the like. Measures such as moving the electric neutral point to obtain good commutation along with the magnetic flux density due to the field are taken, but when the field is a permanent magnet, the magnetomotive force cannot be controlled. There is a problem that such measures cannot be taken.
【０００５】本発明は上述のような問題に鑑みてなされ
たものであり、その目的は永久磁石の作る磁気回路内に
電磁石を配設し、転流時点の永久磁石による磁束を相殺
制御しようとする電磁駆動バルブを提供するものであ
る。The present invention has been made in view of the above problems, and an object thereof is to arrange an electromagnet in a magnetic circuit formed by a permanent magnet to cancel the magnetic flux generated by the permanent magnet at the time of commutation. The present invention provides an electromagnetically driven valve that operates.
【０００６】[0006]
【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、永久磁石からの磁束が導かれた空
隙に配置され、電磁バルブを連結した可動コイルへの通
電により駆動される電磁駆動バルブにおいて、前記の磁
束を導く磁路に巻回された巻線と、前記可動コイルへの
通電の転流時に永久磁石からの磁束を打消する方向の電
流を前記巻線に通電し空隙の磁束を制御する磁束制御手
段とを設けた電磁駆動バルブが提供される。In order to achieve the above object, according to the present invention, a magnetic coil is arranged in a gap through which a magnetic flux from a permanent magnet is guided, and is driven by energizing a moving coil to which an electromagnetic valve is connected. In the electromagnetically driven valve described above, a winding wound around a magnetic path that guides the magnetic flux and a current in a direction that cancels the magnetic flux from the permanent magnet when commutating the current to the movable coil are applied to the winding. There is provided an electromagnetically driven valve provided with a magnetic flux control means for controlling the magnetic flux in the air gap.
【０００７】[0007]
【作用】永久磁石からの磁束が空隙に導かれる磁路に巻
線を施して電磁石とし、該空隙に配置される可動コイル
への電流の転流時には前記巻線への通電の制御により永
久磁石からの磁束と相殺させるので、転流による逆起電
力が生ずることなく、したがって通電回路の整流子やブ
ラシなどの寿命の低下が防止される。The magnetic path from which the magnetic flux from the permanent magnet is guided to the air gap is wound into an electromagnet, and when the current is commutated to the moving coil disposed in the air gap, the permanent magnet is controlled by controlling the energization of the winding. Since it cancels out with the magnetic flux from, the back electromotive force due to commutation does not occur, and thus the life of the commutator or brush of the energizing circuit is prevented from being shortened.
【０００８】[0008]
【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.
【０００９】図１は本発明にかかる電磁駆動バルブの一
実施例を示す上面図、および断面図であり、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、閉弁時にはバル
ブシート１３に弁部１４が着座して流路を閉鎖する。FIG. 1 is a top view and a sectional view showing an embodiment of an electromagnetically driven valve according to the present invention. In FIG. 1, 1 is an electromagnetic valve, and its stem 11 is vertically reciprocable by a valve guide 12. The valve portion 14 is seated on the valve seat 13 to close the flow path when the valve is closed.
【００１０】２は上界磁部で、吸気側と排気側との上部
の界磁が組合わされており、そのコア部２０は一対の内
磁極２１と一対の永久磁石２２と外磁極２３とにより、
後述する２つの可動コイルの上辺が配置される空隙２４
と空隙２５とが一対の内磁極２１の間に形成されてい
る。そして、永久磁石２２はそれぞれ図示の方向に強力
に着磁されているため、空隙２４と空隙２５とには左か
ら右に向う強い磁束が生じている。Reference numeral 2 denotes an upper magnetic field portion, in which upper and lower magnetic fields of the intake side and the exhaust side are combined, and the core portion 20 thereof includes a pair of inner magnetic poles 21, a pair of permanent magnets 22 and an outer magnetic pole 23. ,
A void 24 in which the upper sides of two moving coils to be described later are arranged
And a gap 25 are formed between the pair of inner magnetic poles 21. Since the permanent magnets 22 are strongly magnetized in the directions shown in the figure, a strong magnetic flux is generated in the gap 24 and the gap 25 from left to right.
【００１１】一対の巻線２６は吸気側に対応する内磁極
２１の磁路の部分に巻回されたもので、該巻線２６への
電流の強さや方向の制御により、例えば空隙２４の磁束
を殆んど０にすることや、また永久磁石による磁束を強
めることが自在に構成されており、また一対の巻線２７
は排気側に対応する内磁極２１の磁路の部分に巻回さ
れ、その通電の制御により空隙２５の磁束を０にした
り、強力にすることができるものである。The pair of windings 26 are wound around the magnetic path portion of the inner magnetic pole 21 corresponding to the intake side, and the magnetic flux in the air gap 24 is controlled by controlling the strength and direction of the current flowing through the winding 26. Is set to almost zero, and the magnetic flux generated by the permanent magnet can be strengthened.
Is wound around the magnetic path of the inner magnetic pole 21 corresponding to the exhaust side, and the magnetic flux in the air gap 25 can be made zero or strong by controlling the energization.
【００１２】つぎに、３は下界磁部で、前記の上界磁部
２に対応して下側に設けられ、コア部３０はコア部２０
とほぼ同様に一対の内磁極３１、一対の永久磁石３２、
外磁極３３、巻線３６などが備えられ、吸気側に対応す
る空隙３４や排気側の空隙に強い磁束を生ずるもので、
また一対の巻線３６などはその通電の制御により空隙３
４などの磁束を前記と同様に自在に制御できるものであ
る。Next, 3 is a lower magnetic field portion, which is provided on the lower side corresponding to the upper magnetic field portion 2, and the core portion 30 is the core portion 20.
And a pair of inner magnetic poles 31, a pair of permanent magnets 32,
An outer magnetic pole 33, a winding 36, etc. are provided to generate a strong magnetic flux in the air gap 34 corresponding to the intake side and the air gap on the exhaust side.
In addition, the pair of windings 36 and the like have a space
The magnetic flux such as 4 can be freely controlled in the same manner as described above.
【００１３】つぎに図２は可動コイルを示す斜視図で、
吸気側の可動コイル４および排気側の可動コイル５とも
に図示のように４角な平板状に集中巻され、その中央の
空間に通電を断続する整流子４１とブラシ４２との一対
の組が設けられている。そして、可動コイルの下端から
は非磁性体の連結フォーク４３が下方に向けて突出され
ており、電磁バルブ１とはステム１１の上方に結合され
たアッパーシート１５に固着され、可動コイルの推力が
電磁バルブ１に伝達される。なお、１６は弾性体からな
るスプリングで、可動コイルや電磁バルブを上方に押上
げて閉弁位置にバイアスするものである。Next, FIG. 2 is a perspective view showing the movable coil.
Both the intake side movable coil 4 and the exhaust side movable coil 5 are concentratedly wound in a rectangular flat plate shape as shown in the figure, and a pair of sets of a commutator 41 and a brush 42 for intermittently energizing the central space are provided. Has been. A non-magnetic connecting fork 43 projects downward from the lower end of the movable coil, and is fixed to the upper seat 15 coupled to the electromagnetic valve 1 above the stem 11 so that the thrust of the movable coil is increased. It is transmitted to the electromagnetic valve 1. Reference numeral 16 denotes a spring made of an elastic body, which pushes up the movable coil or the electromagnetic valve upward to bias the valve to the closed position.
【００１４】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、吸気弁となる電磁バルブ１の開弁に際
し、上界磁部２の空隙２６および下界磁部３の空隙３６
の磁場を駆動初期に強めるために、巻線２６，２６およ
び巻線３６，３６に対し、それぞれ永久磁石２２，３２
の磁束を強める方向の電流を通ずる。Next, the operation of the present embodiment thus constructed will be described. When the electromagnetic valve 1 serving as an intake valve is opened, the air gap 26 of the upper magnetic field portion 2 and the air gap 36 of the lower magnetic field portion 3 are opened.
In order to strengthen the magnetic field of the coils in the initial stage of driving, the windings 26, 26 and the windings 36, 36 have permanent magnets 22, 32 respectively.
The current flows in the direction that strengthens the magnetic flux of.
【００１５】一方、可動コイル４には一対の整流子４１
とブラシ４２とを介して図示の方向の電流を通じ、空隙
２４，３４の磁束との電磁力により下方向の推力を生じ
させて電磁バルブ１を下方に駆動する。そして、電磁バ
ルブ１の下方への移動に従い、整流子４１とブラシ４２
との相対位置がずれて、所定位置に達すると両者間の接
触が離れて電流は断となるが、この断となる以前に巻線
２６，３６には永久磁石２２，３２の磁束を弱めて空隙
２４，３４の磁束を相殺させる方向の電流を供給する。
このため、可動コイル４への電流が断となる際の逆起電
力は発生がなく、したがって整流子４１とブラシ４２と
の間の火花の発生も防止されることになる。On the other hand, the movable coil 4 has a pair of commutators 41.
A current in the illustrated direction is passed through the brush 42 and the brush 42 to generate a downward thrust by the electromagnetic force of the magnetic flux in the air gaps 24, 34 to drive the electromagnetic valve 1 downward. Then, as the electromagnetic valve 1 moves downward, the commutator 41 and the brush 42
When the relative position of the permanent magnets 22 and 32 is displaced and reaches a predetermined position, the contact between the two is separated and the current is cut off. A current is supplied in a direction to cancel the magnetic flux in the air gaps 24 and 34.
Therefore, no counter electromotive force is generated when the current to the movable coil 4 is cut off, and thus sparks between the commutator 41 and the brush 42 are also prevented.
【００１６】なお、上述の説明は吸気側の電磁バルブの
駆動を述べたものであるが、縦断面図における裏側に設
けられた駆動コイル５に連結されたほぼ同様な構成の排
気側の電磁バルブの駆動も上述とほぼ同様に作動するも
ので、電流が断となるときの火花の発生は防止される。Although the above description has described the driving of the intake side electromagnetic valve, the exhaust side electromagnetic valve connected to the driving coil 5 provided on the back side in the longitudinal sectional view has a substantially similar structure. The driving of is also operated in substantially the same manner as described above, and the generation of sparks when the current is cut off is prevented.
【００１７】以上、上述の実施例によって本発明を説明
したが、本発明の主旨の範囲内で種々の変形が可能であ
り、これらの変形を本発明の範囲から排除するものでは
ない。Although the present invention has been described with reference to the above embodiments, various modifications are possible within the scope of the gist of the present invention, and these modifications are not excluded from the scope of the present invention.
【００１８】[0018]
【発明の効果】上述の実施例のように本発明によれば、
永久磁石からの磁束が空隙に導かれる磁路に巻線を設
け、該空隙に配置される可動コイルへの電流の転流時に
は、前記巻線に対して永久磁石の磁束を相殺させる励磁
電流を通電するので、転流による逆起電力が発生せず、
このため可動コイルの通電回路の整流子とブラシとの間
の火花が抑えられて、これらの長寿命が保持される。According to the present invention as in the above embodiments,
A winding is provided in the magnetic path through which the magnetic flux from the permanent magnet is guided to the air gap, and at the time of commutation of the current to the moving coil arranged in the air gap, an exciting current that cancels the magnetic flux of the permanent magnet is applied to the winding. Since it energizes, back electromotive force due to commutation does not occur,
Therefore, sparks between the commutator of the moving circuit of the moving coil and the brush are suppressed, and their long life is maintained.
【００１９】また本発明によれば、電磁バルブの開弁初
期に強力な駆動力を要する場合は、前記の磁路の巻線へ
の通電方向を、永久磁石の磁束を付勢する方向に制御す
ることにより、可動コイルの推力の増大が行えるといる
利点が生ずる。Further, according to the present invention, when a strong driving force is required in the initial stage of opening the electromagnetic valve, the energizing direction to the winding of the magnetic path is controlled to the direction of energizing the magnetic flux of the permanent magnet. By doing so, there is an advantage that the thrust of the movable coil can be increased.
【図１】本発明にかかる電磁駆動バルブの一実施例を示
す上面図および縦断面図である。FIG. 1 is a top view and a vertical sectional view showing an embodiment of an electromagnetically driven valve according to the present invention.
【図２】本実施例における可動コイルを示す斜視図であ
る。FIG. 2 is a perspective view showing a movable coil according to the present embodiment.
１…電磁バルブ ２…上界磁部 ３…下界磁部 ４，５…可動コイル ２１…内磁極 ２２…永久磁石 ２４，２５…空隙 ２６，２７，３６…巻線 ４１…整流子 ４２…ブラシ DESCRIPTION OF SYMBOLS 1 ... Electromagnetic valve 2 ... Upper field part 3 ... Lower field part 4, 5 ... Moving coil 21 ... Inner magnetic pole 22 ... Permanent magnet 24, 25 ... Air gap 26, 27, 36 ... Winding 41 ... Commutator 42 ... Brush
Claims (2)
され、電磁バルブを連結した可動コイルへの通電により
駆動される電磁駆動バルブにおいて、前記の磁束を導く
磁路に巻回された巻線と、前記可動コイルへの通電の転
流時に永久磁石からの磁束を打消する方向の電流を前記
巻線に通電し空隙の磁束を制御する磁束制御手段とを設
けたことを特徴とする電磁駆動バルブ。1. An electromagnetically driven valve, which is arranged in a space through which a magnetic flux from a permanent magnet is guided and is driven by energizing a movable coil connected to the electromagnetic valve, is wound around a magnetic path for guiding the magnetic flux. A winding and a magnetic flux control means for controlling the magnetic flux in the air gap by supplying a current in the direction of canceling the magnetic flux from the permanent magnet during the commutation of the energization to the movable coil to control the magnetic flux in the air gap. Electromagnetically driven valve.
増加時には、永久磁石からの磁束を付勢する方向の電流
を前記巻線に通電することを特徴とする請求項１記載の
電磁駆動バルブ。2. The electromagnetic drive according to claim 1, wherein the magnetic flux control means applies a current in a direction for energizing the magnetic flux from the permanent magnet to the winding when the thrust of the movable coil increases. valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4122564A JPH05296012A (en) | 1992-04-16 | 1992-04-16 | Solenoid driving valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4122564A JPH05296012A (en) | 1992-04-16 | 1992-04-16 | Solenoid driving valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05296012A true JPH05296012A (en) | 1993-11-09 |
Family
ID=14839017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4122564A Pending JPH05296012A (en) | 1992-04-16 | 1992-04-16 | Solenoid driving valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05296012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1251529A1 (en) * | 2001-04-20 | 2002-10-23 | Renault s.a.s. | Linear valve driving device with permanent magnets |
-
1992
- 1992-04-16 JP JP4122564A patent/JPH05296012A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1251529A1 (en) * | 2001-04-20 | 2002-10-23 | Renault s.a.s. | Linear valve driving device with permanent magnets |
| FR2823902A1 (en) * | 2001-04-20 | 2002-10-25 | Renault | DEVICE FOR LINEAR DRIVING OF A VALVE USING PERMANENT MAGNETS |
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