JPWO2006025173A1 - Engine phase variable device - Google Patents

Engine phase variable device Download PDF

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JPWO2006025173A1
JPWO2006025173A1 JP2006531469A JP2006531469A JPWO2006025173A1 JP WO2006025173 A1 JPWO2006025173 A1 JP WO2006025173A1 JP 2006531469 A JP2006531469 A JP 2006531469A JP 2006531469 A JP2006531469 A JP 2006531469A JP WO2006025173 A1 JPWO2006025173 A1 JP WO2006025173A1
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Prior art keywords
rotating drum
electromagnetic clutch
engine
phase
intermediate member
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JP2006531469A
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Japanese (ja)
Inventor
博昭 渡辺
博昭 渡辺
本間　弘一
弘一 本間
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Nittan Valve Co Ltd
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Nittan Valve Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34483—Phaser return springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
    • F01L2001/3522—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear with electromagnetic brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

【課題】 自動車用のエンジンの可変位相装置において、摩擦による発熱を生じないようにする。【解決手段】 エンジンのクランクシャフトの回転が伝達されるスプロケット（１２）を有する外筒部（１０）と、外筒部に相対回転可能でエンジンの吸気弁又は排気弁を開閉させるカムシャフト（２）に連結された内筒部（２０）と、外筒部及び内筒部にヘリカルスプラインで噛み合う中間部材（３０）とを備え、中間部材を軸方向に移動させることによって、外筒部と内筒部の間に相対回転を生じさせて、吸気弁又は排気弁の開閉タイミングを変化させる位相可変装置において、中間部材に螺合するとともに永久磁石とされた回転ドラム（４４）と、回転ドラムを制動又は加速する電磁クラッチ（４２）とを有する電磁制御手段（４０ａ）を備える。【選択図】 図１PROBLEM TO BE SOLVED: To prevent heat generation due to friction in a variable phase device of an engine for an automobile. An outer cylinder (10) having a sprocket (12) to which rotation of an engine crankshaft is transmitted, and a camshaft (2) capable of rotating relative to the outer cylinder and opening and closing an intake valve or an exhaust valve of the engine ) And an intermediate member (30) meshed with the outer cylinder part and the inner cylinder part by a helical spline, and by moving the intermediate member in the axial direction, In a phase variable device that changes the opening / closing timing of an intake valve or an exhaust valve by causing relative rotation between cylindrical portions, a rotary drum (44) that is screwed into an intermediate member and is a permanent magnet, and a rotary drum Electromagnetic control means (40a) having an electromagnetic clutch (42) for braking or accelerating is provided. [Selection] Figure 1

Description

本発明は、自動車用エンジンのクランクシャフトの回転をエンジンの吸気弁又は排気弁を開閉させるためのカムシャフトに伝達するとともに、エンジンの負荷や回転数等の運転状態によって吸気弁又は排気弁の開閉タイミングを変化させる自動車用エンジンの位相可変装置に関する。   The present invention transmits the rotation of the crankshaft of an automobile engine to a camshaft for opening and closing the intake valve or exhaust valve of the engine, and opens and closes the intake valve or exhaust valve depending on the operating state such as the engine load and the rotational speed. The present invention relates to a phase varying device for an automobile engine that changes timing.

この種の位相可変装置としては、本出願人らの提案による下記特許文献１に開示されたようなものが知られている。これを図７に示す。   As this type of phase variable device, the one disclosed in the following Patent Document 1 proposed by the present applicants is known. This is shown in FIG.

この位相可変装置は、吸気弁又は排気弁を開閉するため、図示しないエンジンケース（位相可変装置用カバー）に組み付けた形態で用いられ、エンジンのクランクシャフトの駆動力が、図示しないチェーンによって伝達されるスプロケット１２を有する円環状の外筒部１０と、この外筒部１０と同軸に配置されて外筒部１０に対し相対回動可能で、カムシャフト２の一部を構成する従動側の円環状の内筒部２０と、外筒部１０と内筒部２０にそれぞれヘリカルスプライン係合して外筒部１０と内筒部２０間に介装され、軸方向に移動して外筒部１０に対する内筒部２０の位相を変える中間部材３０と、内筒部２０のカムシャフト２の配設された側と反対側に設けられて、中間部材３０を軸方向に移動させる電磁制御手段である電磁ブレーキ４０とを備えている。このカムシャフト２には、吸気弁又は排気弁の一方を開閉するためのカム２ａが設けられる。   This phase variable device is used in a form assembled to an engine case (phase variable device cover) (not shown) to open and close the intake valve or the exhaust valve, and the driving force of the crankshaft of the engine is transmitted by a chain (not shown). An annular outer cylinder portion 10 having a sprocket 12 and a driven-side circle that is arranged coaxially with the outer cylinder portion 10 and is rotatable relative to the outer cylinder portion 10 and constitutes a part of the camshaft 2. The annular inner cylinder part 20, the outer cylinder part 10 and the inner cylinder part 20 are respectively helically spline-engaged and interposed between the outer cylinder part 10 and the inner cylinder part 20, and move in the axial direction to move the outer cylinder part 10. An intermediate member 30 that changes the phase of the inner cylinder part 20 with respect to the inner cylinder part 20, and an electromagnetic control means that is provided on the opposite side of the inner cylinder part 20 from the side where the camshaft 2 is disposed and moves the intermediate member 30 in the axial direction. Electromagnetic brake 4 It is equipped with a door. The camshaft 2 is provided with a cam 2a for opening and closing one of the intake valve and the exhaust valve.

外筒部１０は、内周縁にリング状の凹部１３が設けられたスプロケット１２と、スプロケット１２の側面に密着し、凹部１３と協働してフランジ係合溝１３Ａを画成する内フランジプレート１４と、内フランジプレート１４をスプロケット１２に共締め固定し、中間部材３０とのスプライン係合部１７が内周に形成されたスプラインケース１６とから構成されている。外筒部１０の凹部１３の開口側の大径凹部１３ａ、凹部１３の奧側の小径凹部１３ｂで、両凹部１３ａ，１３ｂ間には、内筒部２０側のフランジ２４の外周縁と正対する段差部１３ｃが設けられている。スプロケット１２と内フランジプレート１４とスプラインケース１６は、締結ねじ１１によって一体化されているので、フランジ係合溝１３Ａと、スプラインケース１６におけるスプライン係合部１７の形成が容易になっている。   The outer cylinder portion 10 includes a sprocket 12 provided with a ring-shaped concave portion 13 on the inner peripheral edge, and an inner flange plate 14 that is in close contact with the side surface of the sprocket 12 and defines a flange engaging groove 13A in cooperation with the concave portion 13. The inner flange plate 14 is fastened together with the sprocket 12 and a spline engaging portion 17 with the intermediate member 30 is formed from a spline case 16 formed on the inner periphery. A large-diameter concave portion 13a on the opening side of the concave portion 13 of the outer cylinder portion 10 and a small-diameter concave portion 13b on the flange side of the concave portion 13 face the outer peripheral edge of the flange 24 on the inner cylindrical portion 20 side between the concave portions 13a and 13b. A step portion 13c is provided. Since the sprocket 12, the inner flange plate 14, and the spline case 16 are integrated by the fastening screw 11, the flange engagement groove 13A and the spline engagement portion 17 in the spline case 16 can be easily formed.

なお、外筒部１０には小径スプロケット１２Ａが固着されているが、この小径スプロケット１２Ａは、図示省略するが、吸気弁又は排気弁の他方を開閉するための位相可変装置のスプロケットとチェーンで連結されて、吸気弁と排気弁の両方を開閉制御するためのものである。   Although a small-diameter sprocket 12A is fixed to the outer cylinder portion 10, this small-diameter sprocket 12A is connected to a sprocket of a phase variable device for opening and closing the other of the intake valve and the exhaust valve by a chain, although not shown. Thus, it is for controlling opening and closing of both the intake valve and the exhaust valve.

ところで、中間部材３０の内外周面には雌雄のヘリカルスプライン３２、３３が設けられ、内筒部２０の外周面には雄ヘリカルスプライン２３が設けられ、スプラインケース１６の内周面のスプライン係合部１７には雌ヘリカルスプラインが形成されている。そして、中間部材３０の内外のスプライン３２，３３は逆方向のヘリカルスプラインとされていて、中間部材３０の軸方向への僅かな移動で、外筒部１０に対し内筒部２０の位相を大きく変化させることができるようになっている。中間部材３０の外周面には雄ねじ部３１が形成されている。   By the way, male and female helical splines 32 and 33 are provided on the inner and outer peripheral surfaces of the intermediate member 30, and male helical splines 23 are provided on the outer peripheral surface of the inner cylinder portion 20, and the spline engagement of the inner peripheral surface of the spline case 16 is performed. A female helical spline is formed in the portion 17. The inner and outer splines 32 and 33 of the intermediate member 30 are helical splines in opposite directions, and the phase of the inner cylinder portion 20 is increased with respect to the outer cylinder portion 10 by a slight movement of the intermediate member 30 in the axial direction. It can be changed. A male screw portion 31 is formed on the outer peripheral surface of the intermediate member 30.

電磁ブレーキ４０は、クラッチケース６０内に電磁石（電磁コイル）６２を備え、クラッチケース表面に摩擦材６６を固着した電磁クラッチ４２と、電磁クラッチ４２の摩擦材６６から制動力を受けるため強磁性体からなる回転ドラム４４と、回転ドラム４４と外筒部１０間に軸方向に介装されたねじりコイルばね４６とから構成される。電磁クラッチ４２は、ピン６８がエンジンケースに設けた孔に係合していて、軸方向に移動可能だが回転不能にエンジンケースに支持される。回転ドラム４４は、ベアリング２２によって内筒部２０に回転可能に支承され、中間部材３０の雄ねじ部３１に螺合する雌ねじ部４５が形成されている。回転ドラム４４が外筒部１０に対して相対回転すると、両ねじ部４５，３１の働きによって中間部材３０は軸方向に移動する。   The electromagnetic brake 40 includes an electromagnet (electromagnetic coil) 62 in a clutch case 60, and receives a braking force from the electromagnetic clutch 42 having a friction material 66 fixed to the clutch case surface and the friction material 66 of the electromagnetic clutch 42. And a torsion coil spring 46 interposed between the rotating drum 44 and the outer cylinder portion 10 in the axial direction. The electromagnetic clutch 42 has a pin 68 engaged with a hole provided in the engine case, and is supported by the engine case so that it can move in the axial direction but cannot rotate. The rotating drum 44 is rotatably supported on the inner cylinder portion 20 by the bearing 22, and a female screw portion 45 that is screwed into the male screw portion 31 of the intermediate member 30 is formed. When the rotating drum 44 rotates relative to the outer cylinder portion 10, the intermediate member 30 moves in the axial direction by the action of both screw portions 45 and 31.

電磁クラッチ４２がＯＦＦのときは、回転ドラム４４には制動力が働かないため、回転ドラム４４と外筒部１０とは、ねじりコイルばね４６によって初期位置に固定され、外筒部１０，内筒部２０，中間部材３０および回転ドラム４４は一体に回転し、外筒部１０と内筒部２０には位相差を生じない。すると、内筒部２０はカムシャフト２に連結され、外筒部１０はクランクシャフトに設けられたクランクプーリとチェーンで連結されているので、クランクシャフトの回転に応じて、通常のタイミングで吸気弁又は排気弁を開閉することができる。
電磁クラッチ４２をＯＮにすると、電磁クラッチ４２に設けた摩擦材６６と回転ドラム４４には摩擦による制動力が作用する。制動力が回転ドラム４４に作用すると、回転ドラム４４が外筒部１０に対して回転遅れが生じ、中間部材３０がねじ部３１，４５の働きによって図７で右方向に移動し、中間部材３０の内外ヘリカルスプライン３２，２３によって、内筒部２０が外筒部１０に対し回動して、両者の位相差が変わる。そして、回転ドラム４４は、制動力とねじりコイルばね４６のばね力とがバランスする位置に保持される。電磁クラッチ４２の電磁石に供給する電流を制御すると、内筒部２０と外筒部１０とを所望の位相差に制御できる。これにより、吸気弁又は排気弁の開閉タイミングを適切に変化させることができる。When the electromagnetic clutch 42 is OFF, no braking force is applied to the rotating drum 44, so the rotating drum 44 and the outer cylinder portion 10 are fixed at the initial position by the torsion coil spring 46, and the outer cylinder portion 10 and the inner cylinder 10 are fixed. The portion 20, the intermediate member 30, and the rotary drum 44 rotate integrally, and no phase difference is generated between the outer cylinder portion 10 and the inner cylinder portion 20. Then, since the inner cylinder part 20 is connected to the camshaft 2 and the outer cylinder part 10 is connected to a crank pulley provided on the crankshaft by a chain, the intake valve is operated at a normal timing according to the rotation of the crankshaft. Alternatively, the exhaust valve can be opened and closed.
When the electromagnetic clutch 42 is turned on, a braking force due to friction acts on the friction material 66 and the rotary drum 44 provided in the electromagnetic clutch 42. When the braking force is applied to the rotating drum 44, the rotating drum 44 is delayed in rotation with respect to the outer cylinder portion 10, and the intermediate member 30 moves rightward in FIG. The inner and outer helical splines 32 and 23 cause the inner cylinder part 20 to rotate with respect to the outer cylinder part 10, and the phase difference between the two changes. The rotating drum 44 is held at a position where the braking force and the spring force of the torsion coil spring 46 are balanced. By controlling the current supplied to the electromagnet of the electromagnetic clutch 42, the inner cylinder part 20 and the outer cylinder part 10 can be controlled to a desired phase difference. Thereby, the opening / closing timing of an intake valve or an exhaust valve can be changed appropriately.

再び、電磁クラッチ４２をＯＦＦにすると、制動力が回転ドラム４４に働かなくなり、ねじりコイルばね４６の作用により中間部材３０は、初期位置まで回転し、ねじ部３１，４５の働きによって図７で左方向に初期位置まで移動する。すると、内筒部２０が外筒部１０に対し逆方向に初期位置まで回動して、両者の位相差がなくなり、通常のタイミングで吸気弁又は排気弁を開閉するようになる。   When the electromagnetic clutch 42 is turned off again, the braking force does not act on the rotating drum 44, and the intermediate member 30 rotates to the initial position by the action of the torsion coil spring 46, and the left and right in FIG. Move to the initial position in the direction. Then, the inner cylinder part 20 rotates to the initial position in the opposite direction with respect to the outer cylinder part 10, the phase difference between them disappears, and the intake valve or the exhaust valve is opened and closed at normal timing.

ところで、内筒部２０のフランジ２４と、外筒部１０のフランジ係合溝１３Ａの側面間に摩擦トルク付加部材５１，５５が介装されて、外筒部１０と内筒部２０間の相対摺動部の摩擦トルクを高めるとともに、中間部材３０と外筒部１０および内筒部２０間のヘリカルスプライン係合部２３，３２、３３，１７における歯部同士がぶつかる打音の発生が抑制している。   By the way, the friction torque adding members 51 and 55 are interposed between the flange 24 of the inner cylinder part 20 and the side surface of the flange engaging groove 13A of the outer cylinder part 10, so that the relative relationship between the outer cylinder part 10 and the inner cylinder part 20 is relative. While increasing the friction torque of the sliding portion, the occurrence of a hitting sound that the tooth portions of the helical spline engaging portions 23, 32, 33, 17 between the intermediate member 30, the outer cylindrical portion 10 and the inner cylindrical portion 20 collide with each other is suppressed. ing.

また、この位相可変装置内部には、エンジンオイルが、カムシャフト２の入口７３ａ、カムシャフト２内のオイル通路、出口７３ｂを経て供給される。出口７３ｂから出たエンジンオイルは、電磁クラッチ４２表面に設けた摩擦材６６と回転ドラム４４間の摺動面との間に供給されて、摩擦材６６と回転ドラム４４との摩擦による過熱を防止するようになっている（詳細は下記特許文献１参照）。
特開２００２−３７１８１４号公報 In addition, engine oil is supplied into the phase varying device through an inlet 73a of the camshaft 2, an oil passage in the camshaft 2, and an outlet 73b. The engine oil that has exited from the outlet 73b is supplied between the friction material 66 provided on the surface of the electromagnetic clutch 42 and the sliding surface between the rotary drum 44 and prevents overheating due to friction between the friction material 66 and the rotary drum 44. (For details, refer to Patent Document 1 below).
JP 2002-371814 A

前述したように、前記位相可変装置では、摩擦材６６と回転ドラム４４の相対摺動面では、摩擦熱により摺動面温度が高温となると、エンジンオイル中に分散している酸化防止剤や摩擦調整剤、清浄分散剤等の添加剤の反応物や不溶解分により、一般に多孔質材で構成されている摩擦材の表面が目詰まりし、摩擦材６６と回転ドラム４４に発生する摩擦トルクが低下する可能性があり、摩擦材６６と回転ドラム４４との間にエンジンオイルを流すための冷却機構が必須なものとなる。この冷却機構を構成するために、位相可変装置は、複雑な構造となって、高価になるという問題があった。   As described above, in the phase variable device, when the sliding surface temperature of the friction material 66 and the rotating drum 44 becomes high due to frictional heat, the antioxidant or friction dispersed in the engine oil is increased. The surface of the friction material, which is generally composed of a porous material, is clogged by the reaction product and insoluble matter of additives such as a regulator and a cleaning dispersant, and the friction torque generated in the friction material 66 and the rotary drum 44 is increased. The cooling mechanism for flowing engine oil between the friction material 66 and the rotating drum 44 becomes indispensable. In order to configure this cooling mechanism, the phase variable device has a complicated structure and is expensive.

本発明は、前記問題に鑑みてなされたものであり、自動車用のエンジンの可変位相装置において、摩擦による発熱を生じないようにすることを課題とする。   The present invention has been made in view of the above problems, and an object thereof is to prevent heat generation due to friction in a variable phase device for an automobile engine.

前記課題を達成するために、請求項１に係る発明は、エンジンのクランクシャフトの回転が伝達されるスプロケットを有する外筒部と、該外筒部に相対回転可能でエンジンの吸気弁又は排気弁を開閉させるカムシャフトに連結された内筒部と、前記外筒部及び内筒部にヘリカルスプラインで噛み合う中間部材とを備え、該中間部材を軸方向に移動させることによって、前記外筒部と前記内筒部の間に相対回転を生じさせて、前記吸気弁又は排気弁の開閉タイミングを変化させるエンジンの位相可変装置において、前記中間部材に螺合するとともに永久磁石とされた回転ドラムと、該回転ドラムを制動する電磁クラッチとを有する電磁制御手段を備えたことを特徴とする。   In order to achieve the above object, an invention according to claim 1 is directed to an outer cylinder part having a sprocket to which rotation of a crankshaft of an engine is transmitted, and an intake valve or an exhaust valve of the engine that can rotate relative to the outer cylinder part. An inner cylinder connected to a camshaft that opens and closes, and an intermediate member that meshes with the outer cylinder and the inner cylinder by a helical spline, and by moving the intermediate member in the axial direction, the outer cylinder and In an engine phase variable device that causes relative rotation between the inner cylinder portions to change the opening / closing timing of the intake valve or the exhaust valve, a rotating drum that is screwed into the intermediate member and is a permanent magnet; An electromagnetic control means having an electromagnetic clutch for braking the rotating drum is provided.

請求項２に係る発明は、請求項１に係る発明において、前記回転ドラムには複数の磁極が形成され、前記電磁クラッチにも前記磁極に対応した磁極が形成されるように電磁石を配置し、該電磁石の極性を前記磁極に対して適当な位相で変化させることにより、前記回転ドラムを制動又は加速することを特徴とする。   The invention according to claim 2 is the invention according to claim 1, wherein a plurality of magnetic poles are formed on the rotating drum, and an electromagnet is disposed so that a magnetic pole corresponding to the magnetic pole is also formed on the electromagnetic clutch. The rotating drum is braked or accelerated by changing the polarity of the electromagnet at an appropriate phase with respect to the magnetic pole.

請求項３に係る発明は、請求項１又は２に係る発明において、前記回転ドラムの内方側面に近接させて前記電磁クラッチが配置されたことを特徴とする。   The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the electromagnetic clutch is arranged close to the inner side surface of the rotating drum.

請求項４に係る発明は、請求項１又は２に係る発明において、前記回転ドラムの外周付近のみが磁化され、前記回転ドラムの外周付近に近接させて前記電磁クラッチが配置されたことを特徴とする。   The invention according to claim 4 is characterized in that, in the invention according to claim 1 or 2, only the vicinity of the outer periphery of the rotating drum is magnetized, and the electromagnetic clutch is arranged close to the vicinity of the outer periphery of the rotating drum. To do.

請求項１係る発明の位相可変装置によれば、電磁クラッチの電磁石と永久磁石である回転ドラムとの間の電磁力によって回転ドラムを制動するから、摩擦材が不要になる。また、この可変位相装置は、電磁クラッチの摩擦材と回転ドラムとの接触による摩擦熱によって高温になることがないので、エンジンオイル劣化低減効果がある。また、電磁クラッチと回転ドラムに対する冷却機構が不要となって、構造が簡単となるうえ、故障しにくく、長寿命となる。さらに、この可変位相装置は、冷却用のエンジンオイルを少なくすることができ、しかも摩擦材が不要になることもあって、経済的である。   According to the phase varying device of the first aspect of the invention, since the rotating drum is braked by the electromagnetic force between the electromagnet of the electromagnetic clutch and the rotating drum that is a permanent magnet, the friction material becomes unnecessary. Further, this variable phase device does not become high temperature due to frictional heat caused by contact between the friction material of the electromagnetic clutch and the rotary drum, and therefore has an effect of reducing engine oil deterioration. In addition, a cooling mechanism for the electromagnetic clutch and the rotating drum is not required, and the structure is simple. Furthermore, this variable phase device is economical because it can reduce engine oil for cooling and also eliminate the need for a friction material.

請求項２係る発明によれば、さらに、前記回転ドラムには複数の磁極が形成され、前記電磁クラッチにも前記磁極に対応した磁極が形成されるように電磁石を配置し、電磁石の極性を回転ドラムの磁極に対して適当な位相で変化させると、電磁クラッチと回転ドラムとの間に吸引力又は反発力を自由自在に持続して発生させることができ、回転ドラムの制動又は加速が自由自在となる。したがって、この位相可変装置では、電磁クラッチ４２によって回転ドラム４４の制動と加速の両方できるので、回転ドラム４４を初期位置に戻すねじりコイルばねが必要なくなり、部品点数を減らすことができる。   According to a second aspect of the invention, a plurality of magnetic poles are formed on the rotating drum, and an electromagnet is arranged so that a magnetic pole corresponding to the magnetic pole is also formed on the electromagnetic clutch, and the polarity of the electromagnet is rotated. By changing the magnetic pole of the drum at an appropriate phase, it is possible to freely and continuously generate an attractive force or a repulsive force between the electromagnetic clutch and the rotating drum, and to freely brake or accelerate the rotating drum. It becomes. Therefore, in this phase variable device, both the braking and acceleration of the rotating drum 44 can be performed by the electromagnetic clutch 42, so that a torsion coil spring for returning the rotating drum 44 to the initial position is not necessary, and the number of parts can be reduced.

請求項３係る発明によれば、さらに、回転ドラムの内方側面に近接させて電磁クラッチが配置されたから、従来の回転ドラムの外方側面に近接させて電磁クラッチが配置されたものより、位相可変装置の全長を短くすることができる。また、従来どおりの全長が許される場合は、中間部材の軸方向への移動範囲を広くでき、従来のものより広範囲に位相変更できる。   According to the third aspect of the present invention, since the electromagnetic clutch is disposed close to the inner side surface of the rotating drum, the phase is more than that of the conventional electromagnetic clutch disposed near the outer side surface of the rotating drum. The total length of the variable device can be shortened. Moreover, when the conventional full length is permitted, the movement range of the intermediate member in the axial direction can be widened, and the phase can be changed over a wider range than the conventional one.

請求項４係る発明によれば、さらに、回転ドラムの外周付近のみが磁化され、回転ドラムの外周付近に近接させて電磁クラッチが配置されたから、いっそう位相可変装置の全長を短くすることができる。また、電磁クラッチが回転ドラムの側方にないから、回転ドラムの直径を小さくすることもできて、回転ドラムの慣性モーメントも小さくでき、この位相可変装置の応答性を良くすることができる。さらに、回転ドラムが軸方向へ移動しても、回転ドラムと電磁クラッチとが常に等距離に保たれるため、高精度で安定な位相制御が可能となる。   According to the fourth aspect of the present invention, since only the vicinity of the outer periphery of the rotating drum is magnetized and the electromagnetic clutch is arranged close to the outer periphery of the rotating drum, the total length of the phase variable device can be further shortened. Further, since there is no electromagnetic clutch on the side of the rotating drum, the diameter of the rotating drum can be reduced, the moment of inertia of the rotating drum can be reduced, and the responsiveness of this phase variable device can be improved. Furthermore, even if the rotating drum moves in the axial direction, the rotating drum and the electromagnetic clutch are always kept at an equal distance, and therefore, highly accurate and stable phase control is possible.

次に、本発明の実施の形態を図面に基づいて説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

図１及び図２に、本発明の位相可変装置の電磁ブレーキに係る第１実施例を示す。図１の（Ａ）は、この位相可変装置の縦断面図であり、図１の（Ｂ）は、この位相可変装置の回転ドラム４４の正面図であり、図１の（Ｃ）は、この位相可変装置の電磁クラッチ４２の正面図である。図２は、この電磁クラッチ４２の電磁石６２への電流供給回路を示す図である。   1 and 2 show a first embodiment relating to an electromagnetic brake of a phase varying device of the present invention. 1A is a longitudinal sectional view of the phase varying device, FIG. 1B is a front view of the rotating drum 44 of the phase varying device, and FIG. It is a front view of the electromagnetic clutch 42 of a phase variable apparatus. FIG. 2 is a diagram showing a current supply circuit to the electromagnet 62 of the electromagnetic clutch 42.

本実施例の位相可変装置は、後述する回転ドラム４４及び電磁クラッチ４２とからなる電磁制御手段４０ａと、同じく電磁石６２への電流供給回路以外は、前記従来の位相可変装置と同じである。以下、本実施例については、従来と同じ部分の説明を省略して、電磁制御手段４０ａと電磁石６２への電流供給回路について説明する。   The phase varying device of the present embodiment is the same as the conventional phase varying device except for an electromagnetic control means 40a comprising a rotating drum 44 and an electromagnetic clutch 42, which will be described later, and a current supply circuit to the electromagnet 62. Hereinafter, in the present embodiment, description of the same parts as in the past will be omitted, and a current supply circuit to the electromagnetic control means 40a and the electromagnet 62 will be described.

この位相可変装置の電磁制御手段４０ａでは、図１の（Ｂ）に示したように、回転ドラム４４は、周方向に沿ってＮ極とＳ極が交互に６つの磁極Ｎ、Ｓが現れるように軸方向に向けて強く磁化された永久磁石となっており、また、図１の（Ｃ）に示したように、電磁クラッチ４２は、回転ドラム４４の外方側面に近接して配置され、クラッチケース内に直列接続された３つの電磁石（電磁コイル）６２を周方向に沿って回転ドラム４４の磁極Ｎ、Ｓと対応させた位置に配置している。また、この電磁制御手段４０ａでは、回転ドラム４４を初期位置に付勢するためのねじりコイルバネを備えておらず、さらに、電磁クラッチ４２は、エンジンケース５８に対して軸方向及び径方向移動可能にされておらず、回転ドラム４４に摺接する摩擦材も備えていない。   In the electromagnetic control means 40a of this phase variable device, as shown in FIG. 1B, the rotary drum 44 has six magnetic poles N and S appearing alternately in the circumferential direction in the N and S poles. In addition, as shown in FIG. 1C, the electromagnetic clutch 42 is disposed in the vicinity of the outer side surface of the rotating drum 44, and the permanent magnet is strongly magnetized in the axial direction. Three electromagnets (electromagnetic coils) 62 connected in series in the clutch case are arranged at positions corresponding to the magnetic poles N and S of the rotary drum 44 along the circumferential direction. The electromagnetic control means 40a does not include a torsion coil spring for urging the rotary drum 44 to the initial position, and the electromagnetic clutch 42 is movable in the axial direction and the radial direction with respect to the engine case 58. The friction material that is in sliding contact with the rotating drum 44 is not provided.

電磁石６２への電流供給回路は、図２に示したように、電源Ｖｃｃから電磁石６２に供給される電流を制御する４つの電流制御器（トランジスタ）６４ａ〜６４ｄと、各電流制御器６４ａ〜６４ｄに制御信号を送るコントローラ６５とからなる。コントローラ６５からの制御信号により、互いに対角に位置する一対の電流制御器６４ａ、６４ｄと、互いに対角に位置する別の一対の電流制御器６４ｂ、６４ｃとを交互にＯＮ、ＯＦＦさせることによって、電磁石６２の極性を交互に変えることができる。この際、回転ドラム４４の磁極Ｎ、Ｓに対する電磁石６２の相対位相を図示しない適当な回転検出センサで検出して、電磁石６２に供給する電流の極性切換を回転ドラム４４の回転に同期させるとともに、磁極Ｎ、Ｓに対して適当な位相（位相遅れ又は位相進み）で制御すると、各電磁石６２と回転ドラム４４間に吸引力又は反発力の一方のみが持続して働くようにでき、これにより回転ドラム４４を自由自在に制動又は加速することができる。   As shown in FIG. 2, the current supply circuit to the electromagnet 62 includes four current controllers (transistors) 64a to 64d for controlling the current supplied from the power source Vcc to the electromagnet 62, and the current controllers 64a to 64d. And a controller 65 for sending a control signal. By alternately turning on and off a pair of current controllers 64a and 64d positioned diagonally to each other and another pair of current controllers 64b and 64c positioned diagonally to each other by a control signal from the controller 65 The polarity of the electromagnet 62 can be changed alternately. At this time, the relative phase of the electromagnet 62 with respect to the magnetic poles N and S of the rotating drum 44 is detected by an appropriate rotation detection sensor (not shown), and the polarity switching of the current supplied to the electromagnet 62 is synchronized with the rotation of the rotating drum 44. When the magnetic poles N and S are controlled with an appropriate phase (phase lag or phase advance), only one of the attractive force or the repulsive force can be continuously operated between the electromagnets 62 and the rotating drum 44, thereby rotating. The drum 44 can be freely braked or accelerated.

また、コントローラ６５には、図示しないクランクプーリとカムシャフト２それぞれに設けられた図示しない回転検出センサからの信号が送られてきていて、コントローラ６５は、クランクプーリに対するカムシャフト２の位相を検出している。そして、コントローラ６５は、エンジン回転数やアクセル位置等に応じた指令位相差を算出して、クランクプーリに対するカムシャフト２の位相制御をしている。すなわち、コントローラ６５は、制御信号を各電流制御器６４ａ〜６４ｄへ送って、クランクプーリとカムシャフト２の位相差が指令位相差に等しくなるまで回転ドラム４４を制動又は加速し、クランクプーリとカムシャフト２の位相差を指令位相差に一致させるように制御することができる。ここで用いたクランクプーリに対するカムシャフト２の位相を検出する回転検出センサは、前述した回転ドラム４４の磁極Ｎ、Ｓに対する電磁石６２の位相検出センサとしても使用することができる。   Further, a signal from a rotation detection sensor (not shown) provided to each of the crank pulley (not shown) and the camshaft 2 is sent to the controller 65, and the controller 65 detects the phase of the camshaft 2 with respect to the crank pulley. ing. The controller 65 calculates a command phase difference corresponding to the engine speed, the accelerator position, and the like, and controls the phase of the camshaft 2 with respect to the crank pulley. That is, the controller 65 sends a control signal to each of the current controllers 64a to 64d to brake or accelerate the rotating drum 44 until the phase difference between the crank pulley and the camshaft 2 becomes equal to the command phase difference, and the crank pulley and cam The phase difference of the shaft 2 can be controlled to match the command phase difference. The rotation detection sensor that detects the phase of the camshaft 2 with respect to the crank pulley used here can also be used as the phase detection sensor of the electromagnet 62 with respect to the magnetic poles N and S of the rotary drum 44 described above.

本実施例の位相可変装置によれば、電磁クラッチ４２の電磁石６２と回転ドラム４４との間の吸引力又は反発力によって、回転ドラム４４に制動又は加速を行うため、両者間に摩擦を生じないので、電磁クラッチ４２に摩擦材が不要となる。また、この位相可変装置によれば、電磁制御手段４０ａは、摩擦熱によって高温になることがないので、冷却機構が不要となって、構造も簡単になり、故障しにくく、長寿命となる。そして、冷却用のエンジンオイルを少なくすることができ、しかも摩擦材が不要になることもあって経済的である。さらに、電磁クラッチ４２によって回転ドラム４４の制動と加速の両方できるので、回転ドラム４４を初期位置に戻すねじりコイルばねが必要なくなり、部品点数を減らすことができる。   According to the phase varying device of the present embodiment, since the rotating drum 44 is braked or accelerated by the attractive force or the repulsive force between the electromagnet 62 of the electromagnetic clutch 42 and the rotating drum 44, there is no friction between them. Therefore, a friction material becomes unnecessary for the electromagnetic clutch 42. Further, according to this phase variable device, the electromagnetic control means 40a does not become high temperature due to frictional heat, so a cooling mechanism is unnecessary, the structure is simplified, it is difficult to break down, and the life is long. Further, the engine oil for cooling can be reduced, and the friction material is unnecessary, which is economical. Further, since both the braking and acceleration of the rotating drum 44 can be performed by the electromagnetic clutch 42, a torsion coil spring for returning the rotating drum 44 to the initial position is not necessary, and the number of parts can be reduced.

図３に、本発明の位相可変装置に係る第２実施例を示す。図３の（Ａ）は、この位相可変装置の縦断面図であり、図３の（Ｂ）は、この位相可変装置の回転ドラム４４の正面図であり、図３の（Ｃ）は、この位相可変装置の電磁クラッチ４２の正面図である。   FIG. 3 shows a second embodiment according to the phase varying device of the present invention. 3A is a longitudinal sectional view of the phase varying device, FIG. 3B is a front view of the rotating drum 44 of the phase varying device, and FIG. It is a front view of the electromagnetic clutch 42 of a phase variable apparatus.

この位相可変装置では、図３の（Ａ）に示したように、前記第１実施例とは、電磁クラッチ４２と回転ドラム４４の配置とエンジンケース５８への取付方が相違する。すなわち、電磁クラッチ４２は、回転ドラム４４の内方側面に近接して配置されるとともに、回転ドラム４４の軸部４４ａにベアリング等の軸受４３を介して支持されている。さらに、電磁クラッチ４２に設けたピン４２ａをエンジンケース５８の回り止め溝５８ａに係合させて、電磁クラッチ４２の回転規制が行われている。回り止め溝５８ａとピン４２ａを係合させたため、電磁クラッチ４２は回転ドラム４４との距離を一定に保ったまま軸方向に移動できるようになっている。これ以外は前記第１実施例と同じである。   As shown in FIG. 3A, this phase varying device is different from the first embodiment in the arrangement of the electromagnetic clutch 42 and the rotating drum 44 and the way to attach to the engine case 58. That is, the electromagnetic clutch 42 is disposed close to the inner side surface of the rotating drum 44 and is supported on the shaft portion 44 a of the rotating drum 44 via a bearing 43 such as a bearing. Further, the rotation of the electromagnetic clutch 42 is restricted by engaging a pin 42 a provided on the electromagnetic clutch 42 with a rotation-preventing groove 58 a of the engine case 58. Since the anti-rotation groove 58a and the pin 42a are engaged, the electromagnetic clutch 42 can move in the axial direction while keeping the distance from the rotary drum 44 constant. Other than this, the second embodiment is the same as the first embodiment.

本実施例の位相可変装置によれば、電磁クラッチ４２が回転ドラム４４の内方に配置されるので、前記第１実施例のものより全長を短くすることが可能である。また、電磁クラッチ４２は回転ドラム４４との距離を一定に保っているので、回転ドラム４４へ加える制動力又は加速力が一定に保たれ、高精度で安定した位相制御が可能になる。   According to the phase varying device of the present embodiment, since the electromagnetic clutch 42 is disposed inside the rotary drum 44, the overall length can be made shorter than that of the first embodiment. Further, since the electromagnetic clutch 42 is kept at a constant distance from the rotary drum 44, the braking force or acceleration force applied to the rotary drum 44 is kept constant, and high-precision and stable phase control is possible.

図４に、本発明の位相可変装置に係る第３実施例を示す。図４の（Ａ）は、この位相可変装置の縦断面図であり、図４の（Ｂ）は、この位相可変装置の回転ドラム４４の正面図であり、図４の（Ｃ）は、この位相可変装置の電磁クラッチ４２の正面図である。   FIG. 4 shows a third embodiment according to the phase varying device of the present invention. 4A is a longitudinal sectional view of the phase varying device, FIG. 4B is a front view of the rotating drum 44 of the phase varying device, and FIG. It is a front view of the electromagnetic clutch 42 of a phase variable apparatus.

この位相可変装置では、図４の（Ａ）に示したように、前記第１実施例とは、電磁クラッチ４２を回転ドラム４４の外周に近接して配置し、図４の（Ｂ）に示したように、回転ドラム４４の外周付近のみを磁化させた点で相違し、これ以外は、前記第１実施例と同じである。なお、磁気力の大きさは磁極間の距離の影響が大きいため、回転ドラム４４の外周付近のみを磁化させただけでも、磁極Ｎ、Ｓと電磁石６２との距離が近く充分な磁気力が得られる。   In this phase varying device, as shown in FIG. 4A, in the first embodiment, the electromagnetic clutch 42 is disposed close to the outer periphery of the rotating drum 44, and shown in FIG. As described above, the difference is that only the vicinity of the outer periphery of the rotating drum 44 is magnetized, and the rest is the same as in the first embodiment. Since the magnitude of the magnetic force is greatly influenced by the distance between the magnetic poles, even if only the vicinity of the outer periphery of the rotating drum 44 is magnetized, the distance between the magnetic poles N and S and the electromagnet 62 is close enough to obtain a sufficient magnetic force. It is done.

本実施例の位相可変装置によれば、電磁クラッチ４２を回転ドラム４４の外周側に配置したから、前記第１実施例のものよりも全長を短くすることが可能である。また、電磁クラッチ４２が回転ドラム４４の側方に配置されないから、回転ドラム４４の直径を小さくして、回転ドラム４４の慣性モーメントを小さくし、この位相可変装置の応答性を良くすることができる。さらに、回転ドラム４４が軸方向へ移動しても、回転ドラム４４と電磁クラッチ４２が常に等距離に保たれるため、高精度で安定な位相制御が可能となる。   According to the phase varying device of the present embodiment, since the electromagnetic clutch 42 is disposed on the outer peripheral side of the rotary drum 44, the overall length can be made shorter than that of the first embodiment. Further, since the electromagnetic clutch 42 is not arranged on the side of the rotating drum 44, the diameter of the rotating drum 44 can be reduced, the moment of inertia of the rotating drum 44 can be reduced, and the response of the phase variable device can be improved. . Further, even if the rotary drum 44 moves in the axial direction, the rotary drum 44 and the electromagnetic clutch 42 are always kept at the same distance, so that highly accurate and stable phase control is possible.

ところで、本発明は前記実施例に限るものではない。たとえば、次のように変形可能である。   By the way, the present invention is not limited to the embodiment. For example, it can be modified as follows.

回転ドラム４４と電磁クラッチ４２は、図５及び図６に示したように変形できる。ここで、図５の（Ａ）は、この位相可変装置の回転ドラム４４の正面図であり、図５の（Ｂ）は、図５の（Ａ）のＶ−Ｖ線に沿う断面図であり、図６の（Ａ）は、この位相可変装置の電磁クラッチ４２の正面図であり、図６の（Ｂ）は、電磁クラッチ４２の側面図である。すなわち、回転ドラム４４に形成する磁極Ｎ、Ｓは、前記各実施例のように回転ドラム４４の周方向に沿って交互に設ける必要はなく、図５に示したように、回転ドラム４４の周方向に沿って等間隔に同一極Ｎ（又はＳ）を配置し、磁気クラッチ４２に備える電磁石４２は、その軸方向を前記各実施例のように電磁クラッチ４２の周方向に沿わせる必要はなく、図６に示したように電磁クラッチ４２と直交方向に向けてもよい。   The rotating drum 44 and the electromagnetic clutch 42 can be deformed as shown in FIGS. Here, FIG. 5A is a front view of the rotating drum 44 of the phase varying device, and FIG. 5B is a cross-sectional view taken along the line VV of FIG. 5A. 6A is a front view of the electromagnetic clutch 42 of the phase varying device, and FIG. 6B is a side view of the electromagnetic clutch 42. That is, the magnetic poles N and S formed on the rotating drum 44 do not have to be provided alternately along the circumferential direction of the rotating drum 44 as in the above-described embodiments, and as shown in FIG. The same pole N (or S) is arranged at equal intervals along the direction, and the electromagnet 42 provided in the magnetic clutch 42 does not have to have its axial direction along the circumferential direction of the electromagnetic clutch 42 as in the above embodiments. As shown in FIG. 6, the electromagnetic clutch 42 may be directed in the orthogonal direction.

また、回転ドラム４４に形成する磁極Ｎ、Ｓは、前記各実施例のように６極にする必要なく、２極以上の任意の数でよい。もちろん、電磁クラッチ４２に設ける電磁石６２の極数も、回転ドラム４４に形成した磁極Ｎ、Ｓと同じ数にする必要はなく、電磁石６２によって回転ドラム４４に持続して吸引力又は反発力を与えられるようにすれば、どのような数でどのような配置にしてもよい。   Further, the magnetic poles N and S formed on the rotating drum 44 do not have to be 6 poles as in the above embodiments, and may be any number of 2 poles or more. Of course, the number of poles of the electromagnet 62 provided in the electromagnetic clutch 42 need not be the same as the number of magnetic poles N and S formed on the rotary drum 44, and the attraction force or repulsive force is continuously applied to the rotary drum 44 by the electromagnet 62. As long as it is possible, any number and any arrangement may be used.

さらに、電磁クラッチ４２を回転ドラム４４の内側に配置した前記第２実施例では、電磁クラッチ４２を回転ドラム４４との距離を一定に保ったまま軸方向に移動できるようにしたが、構造を簡単にするためには、電磁クラッチ４２をエンジンケース５８に固着して、軸方向に移動不能にしてもよい。   Further, in the second embodiment in which the electromagnetic clutch 42 is arranged inside the rotary drum 44, the electromagnetic clutch 42 can be moved in the axial direction while keeping the distance from the rotary drum 44 constant, but the structure is simple. In order to achieve this, the electromagnetic clutch 42 may be fixed to the engine case 58 so as not to move in the axial direction.

さらに、前記各実施例では、電磁制御手段４０ａが回転ドラム４４を制動又は加速のいずれも行えるようにしたが、電磁制御手段４０ａは制動のみを行うようにしてもよい。この場合は、回転ドラム４４を初期位置に付勢するためのねじりコイルバネが必須である。該ねじりコイルばねは、電磁クラッチ４２が故障した場合にもエンジン駆動可能にするため、前記第１〜３の各実施例においても弱めのものを備えてもよい。   Further, in each of the embodiments, the electromagnetic control unit 40a can perform either braking or acceleration of the rotating drum 44, but the electromagnetic control unit 40a may perform only braking. In this case, a torsion coil spring for urging the rotary drum 44 to the initial position is essential. The torsion coil spring may be weak in the first to third embodiments so that the engine can be driven even when the electromagnetic clutch 42 fails.

本発明の第１実施例に係る位相可変装置を説明する図である。It is a figure explaining the phase variable apparatus which concerns on 1st Example of this invention. 前記第１実施例に係る位相可変装置の電磁石への電流供給回路を説明する図である。It is a figure explaining the electric current supply circuit to the electromagnet of the phase variable apparatus which concerns on the said 1st Example. 本発明の第２実施例に係る位相可変装置を説明する図である。It is a figure explaining the phase variable apparatus which concerns on 2nd Example of this invention. 本発明の第３実施例に係る位相可変装置を説明する図である。It is a figure explaining the phase variable apparatus which concerns on 3rd Example of this invention. 本発明に係る位相可変装置の回転ドラムの変形例を説明する図である。It is a figure explaining the modification of the rotating drum of the phase variable apparatus which concerns on this invention. 本発明に係る位相可変装置の電磁クラッチの変形例を説明する図である。It is a figure explaining the modification of the electromagnetic clutch of the phase variable apparatus which concerns on this invention. 従来の位相可変装置の縦断面図である。It is a longitudinal cross-sectional view of the conventional phase variable apparatus.

符号の説明Explanation of symbols

２ カムシャフト
１０ 外筒部
１２ スプロケット
２０ 内筒部
３０ 中間部材
４０ａ 電磁制御手段
４２ 電磁クラッチ
４４ 回転ドラム
６２ 電磁石
Ｎ、Ｓ 磁極2 camshaft 10 outer cylinder part 12 sprocket 20 inner cylinder part 30 intermediate member 40a electromagnetic control means 42 electromagnetic clutch 44 rotating drum 62 electromagnet N, S magnetic pole

回転ドラム４４と電磁クラッチ４２は、図５及び図６に示したように変形できる。ここで、図５の（Ａ）は、この位相可変装置の回転ドラム４４の正面図であり、図５の（Ｂ）は、図５の（Ａ）のＶ−Ｖ線に沿う断面図であり、図６の（Ａ）は、この位相可変装置の電磁クラッチ４２の正面図であり、図６の（Ｂ）は、電磁クラッチ４２の側面図である。すなわち、回転ドラム４４に形成する磁極Ｎ、Ｓは、前記各実施例のように回転ドラム４４の周方向に沿って交互に設ける必要はなく、図５に示したように、回転ドラム４４の周方向に沿って等間隔に同一極Ｎ（又はＳ）を配置し、磁気クラッチ４２に備える電磁石６２は、その軸方向を前記各実施例のように電磁クラッチ４２の周方向に沿わせる必要はなく、図６に示したように電磁クラッチ４２と直交方向に向けてもよい。 The rotating drum 44 and the electromagnetic clutch 42 can be deformed as shown in FIGS. Here, FIG. 5A is a front view of the rotating drum 44 of the phase varying device, and FIG. 5B is a cross-sectional view taken along the line VV of FIG. 5A. 6A is a front view of the electromagnetic clutch 42 of the phase varying device, and FIG. 6B is a side view of the electromagnetic clutch 42. That is, the magnetic poles N and S formed on the rotating drum 44 do not have to be provided alternately along the circumferential direction of the rotating drum 44 as in the above-described embodiments, and as shown in FIG. The same pole N (or S) is arranged at equal intervals along the direction, and the electromagnet 62 provided in the magnetic clutch 42 does not have to have its axial direction along the circumferential direction of the electromagnetic clutch 42 as in the above embodiments. As shown in FIG. 6, the electromagnetic clutch 42 may be directed in the orthogonal direction.

Claims (4)

エンジンのクランクシャフトの回転が伝達されるスプロケットを有する外筒部と、該外筒部に相対回転可能でエンジンの吸気弁又は排気弁を開閉させるカムシャフトに連結された内筒部と、前記外筒部及び内筒部にヘリカルスプラインで噛み合う中間部材とを備え、該中間部材を軸方向に移動させることによって、前記外筒部と前記内筒部の間に相対回転を生じさせて、前記吸気弁又は排気弁の開閉タイミングを変化させるエンジンの位相可変装置において、
前記中間部材に螺合するとともに永久磁石とされた回転ドラムと、該回転ドラムを制動する電磁クラッチとを有する電磁制御手段を備えたことを特徴とするエンジンの位相可変装置。An outer cylinder having a sprocket for transmitting rotation of the crankshaft of the engine, an inner cylinder connected to a camshaft capable of rotating relative to the outer cylinder and opening and closing an intake valve or an exhaust valve of the engine; An intermediate member meshing with the cylindrical portion and the inner cylindrical portion by a helical spline, and by moving the intermediate member in the axial direction, a relative rotation is generated between the outer cylindrical portion and the inner cylindrical portion, and the intake air In an engine phase varying device that changes the opening or closing timing of a valve or an exhaust valve,
An engine phase varying device comprising: an electromagnetic control means having a rotating drum that is screwed to the intermediate member and is a permanent magnet; and an electromagnetic clutch that brakes the rotating drum. 前記回転ドラムには複数の磁極が形成され、前記電磁クラッチにも前記磁極に対応した磁極が形成されるように電磁石を配置し、該電磁石の極性を前記回転ドラムの磁極に対して適当な位相で変化させることにより、前記回転ドラムを制動又は加速することを特徴とする請求項１に記載のエンジンの位相可変装置。   A plurality of magnetic poles are formed on the rotating drum, and an electromagnet is disposed in the electromagnetic clutch so that a magnetic pole corresponding to the magnetic pole is formed, and the polarity of the electromagnet is set to an appropriate phase with respect to the magnetic pole of the rotating drum. The engine phase varying device according to claim 1, wherein the rotating drum is braked or accelerated by changing the rotation of the rotating drum. 前記回転ドラムの内方側面に近接させて前記電磁クラッチが配置されたことを特徴とする請求項１又は２に記載のエンジンの位相可変装置。   The engine phase varying device according to claim 1 or 2, wherein the electromagnetic clutch is arranged close to an inner side surface of the rotating drum. 前記回転ドラムの外周付近のみが磁化され、前記回転ドラムの外周付近に近接させて前記電磁クラッチが配置されたことを特徴とする請求項１又は２に記載のエンジンの位相可変装置。   3. The phase varying apparatus for an engine according to claim 1, wherein only the vicinity of the outer periphery of the rotating drum is magnetized, and the electromagnetic clutch is arranged close to the outer periphery of the rotating drum.
JP2006531469A 2004-09-01 2005-08-02 Engine phase variable device Pending JPWO2006025173A1 (en)

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CN1993538A (en) 2007-07-04
WO2006025173A1 (en) 2006-03-09

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