JP2000104554A - Drive device for intake control valve - Google Patents

Drive device for intake control valve

Info

Publication number
JP2000104554A
JP2000104554A JP10275494A JP27549498A JP2000104554A JP 2000104554 A JP2000104554 A JP 2000104554A JP 10275494 A JP10275494 A JP 10275494A JP 27549498 A JP27549498 A JP 27549498A JP 2000104554 A JP2000104554 A JP 2000104554A
Authority
JP
Japan
Prior art keywords
control valve
intake control
valve
intake
current
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
Application number
JP10275494A
Other languages
Japanese (ja)
Inventor
Tadasuke Sato
忠祐 佐藤
Kazuo Miyasato
和夫 宮里
Yasushi Miura
康 三浦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
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 by Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Priority to JP10275494A priority Critical patent/JP2000104554A/en
Publication of JP2000104554A publication Critical patent/JP2000104554A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Characterised By The Charging Evacuation (AREA)

Abstract

PROBLEM TO BE SOLVED: To save a mounting space and to maintain excellent opening and closing operation of a control valve without being influenced by a backlash in the power transmission route of an actuator. SOLUTION: A drive device to drive the opening and closing of an intake control valve through a valve stem comprises an energizing means (a spring) 40 to energize the intake control valve in a normally closing direction; an electromagnetic drive means (a solenoid actuator) 30 to drive an intake control valve in an opening direction against the energizing means and holding the valve in an opening position through a moving core 34 effecting linear movement toward a fixed core 33 by an electromagnetic force generated by applying an electric current on a solenoid coil 32; and a current control means (a current control circuit) reducing a current applied to the solenoid coil during holding of opening of the intake control valve to a value lower than an current applied to the solenoid coil during drive of opening of the intake control valve.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、車両のエンジンに
空気又は混合気を供給する吸気系に設けられ、エンジン
への供給吸気量等を制御する吸気制御弁の駆動装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for an intake control valve which is provided in an intake system for supplying air or air-fuel mixture to a vehicle engine and controls the amount of intake air supplied to the engine.

【０００２】[0002]

【従来の技術】従来、例えば、エンジンの燃焼室内にス
ワールを生じさせるため、又はエンジンの運転状況に応
じて吸気量を制御するため等の目的でエンジンの気筒毎
に複数の吸気路を設け、これら吸気路の内で対応するも
のを同時に開閉すべく、対応する吸気路に夫々配置され
る吸気制御弁を駆動装置により１本の弁軸を介して駆動
させることは広く知られている。2. Description of the Related Art Conventionally, a plurality of intake passages are provided for each cylinder of an engine for the purpose of, for example, generating a swirl in a combustion chamber of the engine or controlling the amount of intake air in accordance with the operation state of the engine. It is widely known that, in order to open and close corresponding ones of these intake passages at the same time, the intake control valves respectively arranged in the corresponding intake passages are driven by a driving device via one valve shaft.

【０００３】この種の従来の吸気制御弁の駆動装置とし
て、例えば、特公平７−３９８１０号公報に開示される
ものがある。この駆動装置においては、吸気制御弁を閉
弁する側に付勢された弁軸に負圧式アクチュエータのロ
ッドの一端が連結されていて、負圧式アクチュエータ
は、ロッドの他端にその内周縁が固定され、その外周縁
がハウジングに固定されるダイアフラムによりハウジン
グ内に区画形成される負圧室に、吸気マニホルド内の吸
入負圧を蓄えるバキュームタンクからの負圧をエンジン
の運転状態に応じて負圧切替弁により選択的に供給され
ることにより、ロッドを介して弁軸を回転させ、制御弁
を開閉するように構成されている。[0003] An example of such a conventional drive device for an intake control valve is disclosed in Japanese Patent Publication No. 7-39810. In this drive device, one end of a rod of a negative pressure actuator is connected to a valve shaft that is biased to close the intake control valve, and the inner peripheral edge of the negative pressure actuator is fixed to the other end of the rod. A negative pressure from a vacuum tank that stores suction negative pressure in the intake manifold is supplied to a negative pressure chamber defined in the housing by a diaphragm whose outer peripheral edge is fixed to the housing, according to the operating state of the engine. By being selectively supplied by the switching valve, the valve shaft is rotated via the rod and the control valve is opened and closed.

【０００４】[0004]

【発明が解決しようとする課題】限られたスペースであ
るエンジンルーム内にはエンジンに多くの補機類が搭載
され、各補機の搭載スペースは互いに制約を受けるた
め、吸気制御弁の駆動装置においてもその搭載スペース
の省スペース化が要求されている。しかしながら、上記
した従来の装置においては、負圧式アクチュエータ、負
圧切替弁及びバキュームタンクのために所定のスペース
を要し、搭載スペースの省スペース化が困難であるとい
う問題があった。尚、この問題は、近年、普及されつつ
ある直接噴射式エンジンにおいては、吸気マニホルド内
の吸入負圧の低下に伴い、負圧式アクチュエータ及びバ
キュームタンクの容量の増加が必要となることから、よ
り顕著となる。In the engine room, which is a limited space, many engines are mounted on the engine, and the mounting space for each auxiliary is restricted by each other. Also, there is a demand for space saving of the mounting space. However, the above-described conventional apparatus has a problem that a predetermined space is required for the negative pressure type actuator, the negative pressure switching valve, and the vacuum tank, and it is difficult to reduce the mounting space. This problem is more remarkable in the direct injection type engine which has been widely used in recent years, because the capacity of the negative pressure type actuator and the vacuum tank needs to be increased with the decrease of the suction negative pressure in the intake manifold. Becomes

【０００５】上記した問題は、特開平９−２８７４５９
号公報に開示されるように、吸気制御弁の弁軸を電動モ
ータから成る駆動装置により回転駆動することで解決す
ることが可能である。しかしながら、この駆動装置によ
ると、電動モータによるコスト増大が避けられないばか
りでなく、弁軸及び吸気制御弁の回転位置を検出するた
めに位置センサを必要とするため、当該駆動装置のコス
トが更に増大すると共に、エンジンルーム内の熱に対す
る電動モータ及び位置センサの作動信頼性が低いという
問題がある。[0005] The above-mentioned problem is disclosed in Japanese Patent Application Laid-Open No. 9-287559.
As disclosed in Japanese Patent Application Laid-Open Publication No. H11-209, the problem can be solved by rotating the valve shaft of the intake control valve by a driving device including an electric motor. However, according to this drive device, not only the cost increase due to the electric motor is unavoidable, but also a position sensor is required to detect the rotational position of the valve shaft and the intake control valve, so that the cost of the drive device further increases. In addition, there is a problem that the operation reliability of the electric motor and the position sensor against heat in the engine room is low.

【０００６】ゆえに、本発明は、当該吸気制御弁の駆動
装置において、高い作動信頼性を維持しつつ、コストの
低減及び搭載スペースの省スペース化を図ることを、そ
の課題とする。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a drive device for an intake control valve that reduces costs and saves space while maintaining high operation reliability.

【０００７】[0007]

【課題を解決するための手段】上記課題を解決するため
に講じた技術的手段は、１つ又は並列に複数設けられた
吸気路を開閉可能な吸気制御弁の駆動装置を、前記吸気
制御弁を常時閉弁方向に付勢する付勢手段と、ソレノイ
ドコイルに電流を印加することで生じる電磁力により固
定コアに向けて直線運動する可動コアを介して前記吸気
制御弁を前記付勢手段に抗して開弁方向に駆動し開弁位
置に保持可能な電磁駆動手段と、前記吸気制御弁の開弁
保持時の前記ソレノイドコイルへの印加電流を前記吸気
制御弁の開弁駆動時の前記ソレノイドコイルへの印加電
流よりも小さくする電流制御手段とから構成したことで
ある。The technical means taken to solve the above-mentioned problem is that a drive device for an intake control valve capable of opening and closing one or a plurality of intake paths provided in parallel is provided by the intake control valve. The intake control valve to the urging means via a urging means for urging the solenoid valve in a normally closed direction and a movable core linearly moving toward a fixed core by an electromagnetic force generated by applying a current to a solenoid coil. An electromagnetic drive means that can be driven in the valve opening direction and held in the valve opening position, and the current applied to the solenoid coil when the intake control valve is kept open is a voltage applied when the intake control valve is driven to open. And current control means for making the current smaller than the current applied to the solenoid coil.

【０００８】上記した手段によれば、エンジンの運転状
態に応じてソレノイドコイルに電流を印加することで生
じる電磁力によって、可動コアを介して吸気制御弁が付
勢手段に抗して開弁駆動される。この電磁力は可動コア
と固定コアとの間の距離の２乗に反比例することから、
吸気制御弁の開弁保持時における電磁力は開弁駆動時に
おける電磁力に比し大きくなって過剰となるが、この過
剰分の電磁力は電流制御手段により吸気制御弁の開弁保
持時にソレノイドコイルへの印加電流を小さくすること
で消失される。この結果、吸気制御弁の開弁保持時には
必要最小限の電流がソレノイドコイルへ印加され、開弁
駆動時にのみ大きな電流がソレノイドコイルへ印加され
ることで、大電流が長時間に亘り印加されることによる
ソレノイドコイルの耐久性の低下が防止され、電磁駆動
手段の作動信頼性が保たれる。According to the above means, the electromagnetic force generated by applying a current to the solenoid coil in accordance with the operating state of the engine causes the intake control valve to open the valve via the movable core against the urging means. Is done. Since this electromagnetic force is inversely proportional to the square of the distance between the movable core and the fixed core,
The electromagnetic force when the intake control valve is held open is greater than the electromagnetic force when the intake control valve is driven to open, and becomes excessive, but the excess electromagnetic force is supplied to the solenoid by the current control means when the intake control valve is held open. It is eliminated by reducing the current applied to the coil. As a result, a minimum necessary current is applied to the solenoid coil when the intake control valve is held open, and a large current is applied to the solenoid coil only when the valve is opened, so that a large current is applied for a long time. As a result, the durability of the solenoid coil is prevented from deteriorating, and the operation reliability of the electromagnetic drive means is maintained.

【０００９】上記した手段において、前記電磁駆動手段
は、その一端側面に凸状又は凹状の第１円錐面部を有
し、前記ソレノイドコイルが巻回された非磁性体製のボ
ビン内に固設される磁性体からなる円筒状の固定コア
と、該固定コアの一端側面に対向して軸方向に移動可能
に配設され、前記固定コアの一端側面に対向する側に前
記第１円錐面部に対応する凹状又は凸状の第２円錐面部
を有する磁性体からなる可動コアと、前記ボビンの外周
に軸方向に延在するように配設される磁性体からなるヨ
ークと、その一端が前記可動コアに固定され、その他端
が前記固定コアの内孔を軸方向に移動可能に貫通してリ
ンクを介して前記吸気制御弁の弁軸に固定されるシャフ
トとから構成するのが望ましい。In the above means, the electromagnetic driving means has a convex or concave first conical surface on one side surface thereof, and is fixed to a non-magnetic bobbin around which the solenoid coil is wound. A cylindrical fixed core made of a magnetic material, and disposed axially movably opposite one end side surface of the fixed core and corresponding to the first conical surface portion on a side opposing one end side surface of the fixed core. A movable core made of a magnetic material having a concave or convex second conical surface portion, a yoke made of a magnetic material arranged to extend in the axial direction on the outer periphery of the bobbin, and one end of the yoke made of the movable core. And a shaft whose other end penetrates the inner hole of the fixed core movably in the axial direction and is fixed to the valve shaft of the intake control valve via a link.

【００１０】[0010]

【発明の実施の形態】以下、本発明に従った吸気制御弁
の駆動装置の一実施形態を図面に基づき、説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a drive device for an intake control valve according to the present invention will be described below with reference to the drawings.

【００１１】図１において、図示しないシリンダヘッド
に結合される吸気マニホルド１０のシリンダヘッドに結
合される側端部に一体的に設けられるボデイ１１には、
エンジンの各気筒毎にシリンダヘッドに形成された図示
しないスワールポートに連通される第１吸気路１２ａ、
１３ａ、１４ａ、１５ａと、各気筒毎にシリンダヘッド
に形成された図示しないストレートポートに連通される
第２吸気路１２ｂ，１３ｂ、１４ｂ，１５ｂとが交互に
同一軸線上に設けられている。尚、ボデイ１１は吸気マ
ニホルド１０と別体に設けられていても良い。In FIG. 1, a body 11 integrally provided at an end of an intake manifold 10 connected to a cylinder head (not shown) is connected to a cylinder head.
A first intake passage 12a that communicates with a swirl port (not shown) formed in a cylinder head for each cylinder of the engine;
13a, 14a, 15a and second intake paths 12b, 13b, 14b, 15b communicating with straight ports (not shown) formed in the cylinder head for each cylinder are alternately provided on the same axis. The body 11 may be provided separately from the intake manifold 10.

【００１２】ボデイ１１には、第１吸気路１２ａ、１３
ａ、１４ａ、１５ａ及び第２吸気路１２ｂ、１３ｂ、１
４ｂ、１５ｂの軸心を径方向に貫通する支持孔１１ａが
形成されていて、該支持孔１１ａ内に１本の弁軸２０が
回転可能に支承されている。第２吸気路１２ｂ、１３
ｂ、１４ｂ、１５ｂを貫通する弁軸２０の部位には、弁
軸２０の回転に応じて第２吸気路１２ｂ、１３ｂ、１４
ｂ、１５ｂを開閉する円板状の吸気制御弁２１が取り付
けられている。弁軸２０の一端は、支持孔１１ａの一端
開口部に形成される環状溝に取付けられるシール部材２
２に気密的に摺接している。また弁軸２０の他端２３
は、支持孔１１ａの他端開口部に形成される環状溝に取
付けられるシール部材２２に気密的に摺接していると共
に、支持孔１１ａの他端から外方に突出している。The body 11 includes first intake passages 12a and 13
a, 14a, 15a and the second intake paths 12b, 13b, 1
A support hole 11a penetrating the shaft centers of 4b and 15b in the radial direction is formed, and one valve shaft 20 is rotatably supported in the support hole 11a. Second intake path 12b, 13
b, 14b, and 15b, the second intake passages 12b, 13b, and 14 are provided in accordance with the rotation of the valve shaft 20.
A disk-shaped intake control valve 21 for opening and closing b and 15b is attached. One end of the valve shaft 20 has a seal member 2 attached to an annular groove formed at one end opening of the support hole 11a.
2 in airtight sliding contact. The other end 23 of the valve shaft 20
Is in airtight sliding contact with a seal member 22 attached to an annular groove formed at the other end opening of the support hole 11a, and protrudes outward from the other end of the support hole 11a.

【００１３】弁軸２０の他端２３には、リンク２４を介
してソレノイドアクチュエータ（電磁駆動手段）３０の
シャフト３５が連結されている。ソレノイドアクチュエ
ータ３０は、図２に示すように、ソレノイドコイル３２
が巻回された樹脂性のボビン３１と、その一端側面に凸
状の第１円錐面部３３ａを有し、ボビン３１内に固設さ
れる磁性体からなる円筒状の固定コア３３と、該固定コ
ア３３の一端側面に対向して軸方向に移動可能に配設さ
れ、固定コア３３の一端側面に対向する側に第１円錐面
部３３ａに対応する凹状の第２円錐面部３４ａを有する
磁性体からなる可動コア３４と、前記ボビン３１の外周
に軸方向に延在するように配設される磁性体からなるヨ
ーク３９と、ボビン３１の両端に夫々ヨーク３９により
かしめ固定される磁性体からなるサイドヨーク３７、３
８と、サイドヨーク３８と共にボビン３１の一端にヨー
ク３９によりかしめ固定され、可動コア３４の固定コア
３３から離間する側への移動を規制するカップ状のカバ
ー３６と、その一端が可動コア３４に固定され、その他
端が固定コア３３の内孔３３ｂを軸方向に移動可能に貫
通してリンク２４を介して弁軸２０の他端２３に固定さ
れるシャフト３５と、固定コア３３と可動コア３４との
間に介装され可動コア３４を固定コア３３から離間する
側に常時付勢するスプリング４０とから構成されてい
る。これにより、ソレノイドコイル３２へ電流が印加さ
れていない状態では、ソレノイドアクチュエータ３０は
図２に示す状態にあり、吸気制御弁２１は図１に示す閉
弁状態にある。ソレノイドコイル３２へコネクタ４１を
介して電流が印加されると、ソレノイドコイル３２の回
りに固定コア３３、サイドヨーク３７、ヨーク３９、サ
イドヨーク３８及び可動コア３４によって形成される磁
気回路により生じる電磁力により可動コア３４が固定コ
ア３３に向けてスプリング４０の付勢力に抗して移動し
て、シャフト３５及びリンク２４を介して弁軸２０が回
動されて吸気制御弁２１が開弁される。A shaft 35 of a solenoid actuator (electromagnetic driving means) 30 is connected to the other end 23 of the valve shaft 20 via a link 24. As shown in FIG. 2, the solenoid actuator 30 includes a solenoid coil 32.
Is wound, and a cylindrical fixed core 33 made of a magnetic material and fixed in the bobbin 31 and having a first conical surface portion 33a that is convex on one end side thereof, A magnetic body that is disposed movably in the axial direction facing one end side surface of the core 33 and has a concave second conical surface portion 34a corresponding to the first conical surface portion 33a on the side facing the one end side surface of the fixed core 33 A movable core 34, a yoke 39 made of a magnetic material arranged to extend in the axial direction on the outer periphery of the bobbin 31, and a side made of a magnetic material caulked and fixed to both ends of the bobbin 31 by the yokes 39, respectively. Yokes 37, 3
8, a cup-shaped cover 36 fixed to one end of the bobbin 31 together with the side yoke 38 by a yoke 39 to restrict the movement of the movable core 34 to the side away from the fixed core 33, and one end of the cover 36 to the movable core 34. A shaft 35 fixed at the other end and axially movable through an inner hole 33b of the fixed core 33 and fixed to the other end 23 of the valve shaft 20 via a link 24; a fixed core 33 and a movable core 34; And a spring 40 which constantly urges the movable core 34 to the side away from the fixed core 33. Thus, when no current is applied to the solenoid coil 32, the solenoid actuator 30 is in the state shown in FIG. 2, and the intake control valve 21 is in the closed state shown in FIG. When a current is applied to the solenoid coil 32 via the connector 41, an electromagnetic force generated by a magnetic circuit formed by the fixed core 33, the side yoke 37, the yoke 39, the side yoke 38, and the movable core 34 around the solenoid coil 32. As a result, the movable core 34 moves toward the fixed core 33 against the urging force of the spring 40, the valve shaft 20 is rotated via the shaft 35 and the link 24, and the intake control valve 21 is opened.

【００１４】ソレノイドコイル３２へは周知の駆動回路
４２を介して電流制御回路５０から印加電流が供給され
るようになっている。電流制御回路５０は、図３に示す
ように、エンジンの運転状態に応じて制御装置６０から
送られる所定のＯＮ時間ｔ１を有するＯＮ・ＯＦＦ信号
５１をｔ１よりも短い所定のＯＮ時間ｔ０の信号に変換
するタイマ回路５２と、ＯＮ・ＯＦＦ信号５１の生成と
同時に制御装置６０により起動されて所定デューティＡ
％のデューティ信号を発生するデューティ発振器５４
と、タイマ回路５２の出力信号とデューティ発振器５４
の出力信号が入力されるＯＲ回路５３と、ＯＲ回路５３
の出力信号とＯＮ・ＯＦＦ信号５１とが入力されるＡＮ
Ｄ回路５５とから構成されている。これにより、図３に
示すように、駆動回路４２への電流制御回路５０からの
入力信号は、ｔ０時間のＯＮ信号の後（ｔ１−ｔ０）時
間の所定デューティＡ％のデューティ信号が続く信号と
なる。ここで、ＯＮ・ＯＦＦ信号５１は、エンジンの運
転状態に応じて吸気制御弁２１を所定時間ｔ１だけ開弁
させるための信号である。また、タイマ回路５２による
所定のＯＮ時間ｔ０はＯＮ・ＯＦＦ信号５１のソレノイ
ドコイル３２への印加により吸気制御弁２１が閉弁状態
から開弁状態になる所要時間に設定され、所定デューテ
ィＡ％は吸気制御弁２１を開弁状態に保持する、即ち、
ソレノイドアクチュエータ３０の可動コア３４を固定コ
ア３３側に吸引された状態に保持するのに要する最小電
流値になるように設定されている。尚、図３に示される
各信号波形は、各回路の出力信号を示す。An applied current is supplied to the solenoid coil 32 from a current control circuit 50 via a known drive circuit 42. As shown in FIG. 3, the current control circuit 50 sends an ON / OFF signal 51 having a predetermined ON time t1 sent from the control device 60 according to the operating state of the engine to a signal of a predetermined ON time t0 shorter than t1. And a predetermined duty A which is started by the control device 60 at the same time when the ON / OFF signal 51 is generated.
Duty oscillator 54 for generating a% duty signal
And the output signal of the timer circuit 52 and the duty oscillator 54
Circuit 53 to which the output signal of
To which the output signal of the switch and the ON / OFF signal 51 are inputted.
And a D circuit 55. Accordingly, as shown in FIG. 3, the input signal from the current control circuit 50 to the drive circuit 42 is a signal in which a duty signal of a predetermined duty A% continues for a time (t1−t0) after an ON signal for a time t0. Become. Here, the ON / OFF signal 51 is a signal for opening the intake control valve 21 for a predetermined time t1 according to the operating state of the engine. The predetermined ON time t0 by the timer circuit 52 is set to a time required for the intake control valve 21 to be changed from the closed state to the open state by applying the ON / OFF signal 51 to the solenoid coil 32. The intake control valve 21 is kept open, that is,
The current is set to a minimum current value required to hold the movable core 34 of the solenoid actuator 30 in a state of being attracted to the fixed core 33 side. Each signal waveform shown in FIG. 3 indicates an output signal of each circuit.

【００１５】以上の構成において、エンジンの低、中速
域ではソレノイドアクチュエータ３０のソレノイドコイ
ル３２に電流が印加されず、ソレノイドアクチュエータ
３０は図２に示す状態にあるため、吸気制御弁２１は閉
弁状態にある。これにより、図示しないエンジンの燃焼
室に第１吸気路１２ａ、１３ａ、１４ａ、１５ａを介し
て吸気がなされる。In the above configuration, no current is applied to the solenoid coil 32 of the solenoid actuator 30 in the low and medium speed ranges of the engine, and the solenoid actuator 30 is in the state shown in FIG. 2, so that the intake control valve 21 is closed. In state. As a result, intake air is taken into the combustion chamber of the engine (not shown) through the first intake passages 12a, 13a, 14a, and 15a.

【００１６】エンジンの高速域では、制御装置６０によ
りＯＮ・ＯＦＦ信号５１が電流制御回路５０のタイマ回
路５２に送られると共に、制御装置６０によりデューテ
ィ発振器５４が起動される。上記したように、ＯＮ・Ｏ
ＦＦ信号５１は、電流制御回路５０のタイマ回路５２、
ＯＲ回路５３及びＡＮＤ回路５５により、ｔ０時間のＯ
Ｎ信号の後、（ｔ１−ｔ０）時間の所定デューティＡ％
のデューティ信号が続く出力信号に変換されて駆動回路
４２を介してソレノイドアクチュエータ３０のソレノイ
ドコイル３２に印加される。これにより、電磁力により
可動コア３４が固定コア３３に向けて移動し、シャフト
３５、リンク２４及び弁軸２０を介して制御弁２１が開
弁されて図示しないエンジンの燃焼室に第１吸気路１２
ａ、１３ａ、１４ａ、１５ａ及び第２吸気路１２ｂ，１
３ｂ、１４ｂ，１５ｂを介して吸気がなされる。In the high speed range of the engine, an ON / OFF signal 51 is sent to a timer circuit 52 of a current control circuit 50 by a control device 60, and a duty oscillator 54 is started by the control device 60. As mentioned above, ON / O
The FF signal 51 is a timer circuit 52 of the current control circuit 50,
By the OR circuit 53 and the AND circuit 55, O
After the N signal, a predetermined duty A% of the time (t1-t0)
The duty signal is converted into a subsequent output signal and applied to the solenoid coil 32 of the solenoid actuator 30 via the drive circuit 42. As a result, the movable core 34 moves toward the fixed core 33 due to the electromagnetic force, and the control valve 21 is opened via the shaft 35, the link 24, and the valve shaft 20, and the first intake passage is inserted into the combustion chamber of the engine (not shown). 12
a, 13a, 14a, 15a and the second intake path 12b, 1
Intake is performed through 3b, 14b, and 15b.

【００１７】以上のように、本実施形態においては、ソ
レノイドアクチュエータ３０により吸気制御弁２１の開
閉が制御されるので、負圧式アクチュエータにより吸気
制御弁を開閉制御する従来の駆動装置に比し、駆動装置
の小型化を図れ搭載スペースの省スペース化を図ること
ができる。また、電動モータから成る従来の駆動装置に
比し、構成の簡素化を図ることができ、吸気制御弁の駆
動装置のコストを低減することができる。As described above, in the present embodiment, the opening and closing of the intake control valve 21 is controlled by the solenoid actuator 30. The size of the device can be reduced, and the mounting space can be saved. Further, the structure can be simplified as compared with a conventional driving device including an electric motor, and the cost of the driving device for the intake control valve can be reduced.

【００１８】また、本実施形態においては、図４に示す
ように、吸気制御弁２１が閉弁状態から開弁状態になる
のに要する時間ｔ０の間のみ、大電流（２Ａ程度）が印
加され、開弁状態での保持状態の（ｔ１−ｔ０）時間は
所定デューティＡ％の小電流（０．５Ａ程度）が印加さ
れる。ソレノイドアクチュエータ３０の可動コア３４を
固定コア３３に向けて移動させるための電磁力は、可動
コア３４と固定コア３３との間の距離の２乗に反比例す
ることから、可動コア３４が固定コア３３に向けて移動
した状態である吸気制御弁２１の開弁保持時における電
磁力は開弁駆動時（図２に示す状態）における電磁力に
比し大きくなって過剰となるが、上記したようにこの過
剰分の電磁力は電流制御回路５０により吸気制御弁２１
の開弁保持時にソレノイドコイル３２への印加電流を小
さくすることで消失される。この結果、吸気制御弁２１
の開弁保持時には必要最小限の電流がソレノイドコイル
３２へ印加され、開弁駆動時にのみ大きな電流がソレノ
イドコイル３２へ印加されることで、大電流が長時間に
亘り印加されることによるソレノイドコイル３２の耐久
性の低下が防止され、ソレノイドアクチュエータ３０の
作動信頼性を良好に保つことができる。In this embodiment, as shown in FIG. 4, a large current (about 2 A) is applied only during a time t0 required for the intake control valve 21 to change from the closed state to the open state. A small current (approximately 0.5 A) with a predetermined duty A% is applied during the time (t1-t0) in the holding state in the valve open state. The electromagnetic force for moving the movable core 34 of the solenoid actuator 30 toward the fixed core 33 is inversely proportional to the square of the distance between the movable core 34 and the fixed core 33. The electromagnetic force when the intake control valve 21 is held open while moving toward the position becomes larger than the electromagnetic force during the valve opening drive (the state shown in FIG. 2) and becomes excessive. This excess electromagnetic force is supplied to the intake control valve 21 by the current control circuit 50.
When the current is applied to the solenoid coil 32 at the time of holding the valve open, the current disappears. As a result, the intake control valve 21
The minimum necessary current is applied to the solenoid coil 32 when the valve is held open, and a large current is applied to the solenoid coil 32 only when the valve is opened, so that a large current is applied for a long time. The durability of the solenoid actuator 30 can be kept low, and the operating reliability of the solenoid actuator 30 can be kept good.

【００１９】[0019]

【発明の効果】以上の如く、本発明によれば、エンジン
の運転状態に応じて電磁駆動手段のソレノイドコイルに
電流を印加することで生じる電磁力によって、可動コア
を介して吸気制御弁を付勢手段に抗して開弁駆動するの
で、負圧式アクチュエータや電動モータから成る従来の
駆動装置に比し、駆動装置の小型化を図れて搭載スペー
スの省スペース化を図ることができると共に、駆動装置
の構成の簡素化を図れて駆動装置のコストを低減するこ
とができる。As described above, according to the present invention, the intake control valve is provided via the movable core by the electromagnetic force generated by applying a current to the solenoid coil of the electromagnetic drive means according to the operating state of the engine. Since the valve is driven to open against the urging means, it is possible to reduce the size of the driving device and to save the mounting space as compared with the conventional driving device including a negative pressure actuator and an electric motor, The configuration of the device can be simplified, and the cost of the drive device can be reduced.

【００２０】また、電磁駆動手段に生じる電磁力は可動
コアと固定コアとの間の距離の２乗に反比例することか
ら、吸気制御弁の開弁保持時における電磁力は開弁駆動
時における電磁力に比し大きくなって過剰となるが、こ
の過剰分の電磁力を電流制御手段により吸気制御弁の開
弁保持時にソレノイドコイルへの印加電流を小さくする
ことで消失することができる。この結果、吸気制御弁の
開弁保持時には必要最小限の電流がソレノイドコイルへ
印加され、開弁駆動時にのみ大きな電流がソレノイドコ
イルへ印加されることで、大電流が長時間に亘り印加さ
れることによるソレノイドコイルの耐久性の低下が防止
され、電磁駆動手段の作動信頼性を良好に保つことがで
きる。Since the electromagnetic force generated in the electromagnetic drive means is inversely proportional to the square of the distance between the movable core and the fixed core, the electromagnetic force when the intake control valve is kept open is the electromagnetic force when the intake control valve is opened. However, the excess electromagnetic force can be eliminated by reducing the current applied to the solenoid coil when the intake control valve is kept open by the current control means. As a result, a minimum necessary current is applied to the solenoid coil when the intake control valve is held open, and a large current is applied to the solenoid coil only when the valve is opened, so that a large current is applied for a long time. As a result, the durability of the solenoid coil is prevented from deteriorating, and the operation reliability of the electromagnetic drive means can be kept good.

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

【図１】本発明に従った吸気制御弁の駆動装置の一実施
形態を示す全体構成図である。FIG. 1 is an overall configuration diagram showing an embodiment of a drive device for an intake control valve according to the present invention.

【図２】図１のソレノイドアクチュエータの断面図であ
る。FIG. 2 is a sectional view of the solenoid actuator of FIG. 1;

【図３】図１の電流制御回路の回路図である。FIG. 3 is a circuit diagram of the current control circuit of FIG. 1;

【図４】図１の吸気制御弁の位置と電流制御回路による
印加電流との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the position of the intake control valve in FIG. 1 and the current applied by the current control circuit.

【符号の説明】[Explanation of symbols]

１０ 吸気マニホルド １１ ボデイ １２ａ、１３ａ、１４ａ、１５ａ 第１吸気路 １２ｂ、１３ｂ、１４ｂ、１５ｂ 第２吸気路 ２０ 弁軸 ２１ 制御弁 ３０ ソレノイドアクチュエータ（電磁駆動手段） ３１ ボビン ３２ ソレノイドコイル ３３ 固定コア ３４ 可動コア ３５ シャフト ３９ ヨーク ４０ スプリング（付勢手段） ５０ 電流制御回路（電流制御手段） Reference Signs List 10 intake manifold 11 body 12a, 13a, 14a, 15a first intake path 12b, 13b, 14b, 15b second intake path 20 valve shaft 21 control valve 30 solenoid actuator (electromagnetic drive means) 31 bobbin 32 solenoid coil 33 fixed core 34 Movable core 35 Shaft 39 Yoke 40 Spring (biasing means) 50 Current control circuit (Current control means)

───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3G031 AA02 AB05 AC01 AD03 AD08 BA02 BA11 BA15 BB09 DA30 DA32 DA38 EA03 HA10 HA12 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3G031 AA02 AB05 AC01 AD03 AD08 BA02 BA11 BA15 BB09 DA30 DA32 DA38 EA03 HA10 HA12

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 １つ又は並列に複数設けられた吸気路を
開閉可能な吸気制御弁の駆動装置であって、前記吸気制
御弁を常時閉弁方向に付勢する付勢手段と、ソレノイド
コイルに電流を印加することで生じる電磁力により固定
コアに向けて直線運動する可動コアを介して前記吸気制
御弁を前記付勢手段に抗して開弁方向に駆動し開弁位置
に保持可能な電磁駆動手段と、前記吸気制御弁の開弁保
持時の前記ソレノイドコイルへの印加電流を前記吸気制
御弁の開弁駆動時の前記ソレノイドコイルへの印加電流
よりも小さくする電流制御手段とを備えてなる吸気制御
弁の駆動装置。1. A driving device for an intake control valve capable of opening and closing one or a plurality of intake passages provided in parallel, comprising: urging means for urging the intake control valve in a normally closing direction; The intake control valve can be driven in the valve-opening direction against the urging means via a movable core that linearly moves toward the fixed core by an electromagnetic force generated by applying a current to the valve, and can be held at the valve-opening position. Electromagnetic drive means, and current control means for making the applied current to the solenoid coil when the intake control valve is kept open smaller than the applied current to the solenoid coil when the intake control valve is driven to open. A drive device for the intake control valve. 【請求項２】 前記電磁駆動手段は、その一端側面に凸
状又は凹状の第１円錐面部を有し、前記ソレノイドコイ
ルが巻回された非磁性体製のボビン内に固設される磁性
体からなる円筒状の前記固定コアと、該固定コアの一端
側面に対向して軸方向に移動可能に配設され、前記固定
コアの一端側面に対向する側に前記第１円錐面部に対応
する凹状又は凸状の第２円錐面部を有する磁性体からな
る可動コアと、前記ボビンの外周に軸方向に延在するよ
うに配設される磁性体からなるヨークと、その一端が前
記可動コアに固定され、その他端が前記固定コアの内孔
を軸方向に移動可能に貫通してリンクを介して前記吸気
制御弁の弁軸に固定されるシャフトとからなることを特
徴とする請求項１に記載の吸気制御弁の駆動装置。2. A magnetic body fixed to a non-magnetic bobbin around which said solenoid coil is wound, said electromagnetic drive means having a first or second conical surface on one side surface thereof. A cylindrical fixed core comprising: a fixed core, which is disposed movably in the axial direction so as to face one end side surface of the fixed core, and has a concave shape corresponding to the first conical surface portion on a side facing one end side surface of the fixed core. Alternatively, a movable core made of a magnetic material having a convex second conical surface portion, a yoke made of a magnetic material arranged to extend in the axial direction on the outer periphery of the bobbin, and one end fixed to the movable core 2. The shaft according to claim 1, wherein the other end comprises a shaft which penetrates through an inner hole of the fixed core so as to be movable in an axial direction and is fixed to a valve shaft of the intake control valve via a link. Drive device for intake control valve.
JP10275494A 1998-09-29 1998-09-29 Drive device for intake control valve Pending JP2000104554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10275494A JP2000104554A (en) 1998-09-29 1998-09-29 Drive device for intake control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10275494A JP2000104554A (en) 1998-09-29 1998-09-29 Drive device for intake control valve

Publications (1)

Publication Number Publication Date
JP2000104554A true JP2000104554A (en) 2000-04-11

Family

ID=17556292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10275494A Pending JP2000104554A (en) 1998-09-29 1998-09-29 Drive device for intake control valve

Country Status (1)

Country Link
JP (1) JP2000104554A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101671950B1 (en) * 2015-05-22 2016-11-16 주식회사 인팩 Solenoid Actuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101671950B1 (en) * 2015-05-22 2016-11-16 주식회사 인팩 Solenoid Actuator

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