JPS61202609U

JPS61202609U -

Info

Publication number: JPS61202609U
Application number: JP8523185U
Authority: JP
Priority date: 1985-06-07
Filing date: 1985-06-07
Publication date: 1986-12-19

Description

[Brief explanation of the drawing]

第１図は本考案の動弁装置の一部切り欠き平面
図でロツカーアームは鎖線で示してあり、第２図
はシリンダヘツドの模式的平面図、第３図は第１
図の―線に沿つたシリンダヘツドの一部の垂
直断面図、第４図はトリツプ機構およびロツカー
アームを示す斜視図、第５図はロツク機構のロー
タを示し、ａはロータの側面をｂはロータの端面
を示し、第６図はロツク機構のラチエツトを表す
図でａはその端面をｂは側面を示し、第７図はロ
ータとラチエツトの相対関係を示す模式図である
。１８……ロツカーアーム、２０……ロツカーア
ームシヤフト、２２……カムシヤフト、４２……
第１カム、４４……第２カム、４６……摺動軸、
７６……油圧ポンプ、７８……油圧アクチユエー
タ、７９……ポンププランジヤ、８０……リター
ンスプリング、８１，８２……ギヤ、８３……フ
エースカム、８６……ポンプ室、９０……プラン
ジヤ、９４……ラチエツト式ロツク機構。 Fig. 1 is a partially cutaway plan view of the valve train of the present invention, in which the rocker arm is indicated by a chain line, Fig. 2 is a schematic plan view of the cylinder head, and Fig. 3 is a schematic plan view of the cylinder head.
4 is a perspective view showing the trip mechanism and rocker arm; FIG. 5 shows the rotor of the locking mechanism; FIG. 6 is a view showing the ratchet of the locking mechanism, where a shows the end face and b shows the side surface, and FIG. 7 is a schematic diagram showing the relative relationship between the rotor and the ratchet. 18...Rotzker arm, 20...Rotzker armshaft, 22...Camshaft, 42...
First cam, 44...second cam, 46...sliding shaft,
76... Hydraulic pump, 78... Hydraulic actuator, 79... Pump plunger, 80... Return spring, 81, 82... Gear, 83... Face cam, 86... Pump chamber, 90... Plunger, 94... Ratchet type lock mechanism.

Claims

[Scope of Claim for Utility Model Registration] A Rocker arm that operatively engages with an intake valve or an exhaust valve is attached to a Rocker arm shaft so as to be swingable and movable in the axial direction, and a camshaft that rotates in synchronization with an engine crankshaft. Two cams with different cam profiles are arranged adjacent to each other,
The rocker arm shaft is formed hollow, and a sliding shaft that interlocks with the rocker arm is installed in the rocker arm shaft so as to be slidable in the axial direction. and a second position in which the rocker arm engages the other cam, the sliding shaft is displaceable to switch the operating mode of the valve, and the sliding shaft is moved into the first position by spring means. A hydraulic actuator is provided, which is aligned with the sliding shaft and drives the sliding shaft toward the second position when switching the valve operation mode, and a ratchet is provided between the hydraulic actuator and the sliding shaft. A hydraulic pump having a plunger driven by a camshaft is provided with a locking mechanism so that the sliding shaft is alternately locked in and released from the second position each time the hydraulic actuator is actuated. In the variable valve operation mode variable valve operating device for an internal combustion engine, the hydraulic pump has a pump chamber connected to a hydraulic actuator, and a discharge port of the hydraulic pump is opened and closed by an electromagnetic on-off valve, wherein the plunger of the hydraulic pump is connected to a camshaft. A variable valve operating mode variable valve operating device characterized in that it is driven by a cam that rotates at a speed lower than that of an articulating camshaft.