JPH02119905U

JPH02119905U -

Info

Publication number: JPH02119905U
Application number: JP3007989U
Authority: JP
Priority date: 1989-03-15
Filing date: 1989-03-15
Publication date: 1990-09-27

Description

[Brief explanation of drawings]

第１図はエンジンの低速域に於ける本考案の一
実施例に係る可変バルブ装置の要部拡大図、第２
図は低速用カムと高速用カムの構造説明図、第３
図はスインガーの駆動手段の説明図、第４図は第
１図のＸ方向矢視図、第５図はエンジンの高速域
に於ける可変バルブ装置の要部拡大図、第６図は
エンジンの低高速域に於ける吸排気バルブのバル
ブリフト量やオーバラツプ量、開弁期間の変化を
示す説明図である。１……カムフオロア、３……カムシヤフト、５
……低速用カム、７……高速用カム、９……スイ
ンガー、９ａ……低速用カム用スインガー、９ａ
′，９ｂ′……作用面、９ｂ……高速用カム用ス
インガー、１５……ＣＰＵ、１７……アクチユエ
ータ。 Fig. 1 is an enlarged view of the main parts of a variable valve device according to an embodiment of the present invention in the low speed range of the engine;
The figure is an explanatory diagram of the structure of the low-speed cam and high-speed cam.
The figure is an explanatory diagram of the swinger drive means, Figure 4 is a view taken in the X direction of Figure 1, Figure 5 is an enlarged view of the main parts of the variable valve device in the high speed range of the engine, and Figure 6 is an illustration of the engine. FIG. 3 is an explanatory diagram showing changes in valve lift amount, overlap amount, and valve opening period of intake and exhaust valves in a low-speed range. 1...Cam follower, 3...Camshaft, 5
...Low speed cam, 7...High speed cam, 9...Swinger, 9a...Low speed cam swinger, 9a
', 9b'... Working surface, 9b... Swinger for high speed cam, 15... CPU, 17... Actuator.

Claims

[Scope of utility model registration request]

A cam follower that lifts the valve, a high-speed cam and a low-speed cam that are attached to the camshaft that rotates in synchronization with the engine rotation, and a cam follower that is interposed between the cam follower and the high and low speed cams, and a cam follower for each high speed on the bottom surface. A swinger formed with two working surfaces that contact a cam and a low-speed cam, respectively, and an actuator that moves the swinger depending on the engine speed to bring the respective working surfaces into contact with the high-speed cam or the low-speed cam. and a control means for operating the actuator based on signals from the engine rotation speed and the cam phase detection means.