JPS61123807U

JPS61123807U -

Info

Publication number: JPS61123807U
Application number: JP730385U
Authority: JP
Priority date: 1985-01-24
Filing date: 1985-01-24
Publication date: 1986-08-04
Also published as: JPH036802Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る吸排気弁（開弁時）の作
動停止機構をロツク位置（作動位置）で示す図解
図、第２図は第１図の平面図、第３図は閉弁時に
おける第２図の―線断面図、第４図はロツク
解除位置（不作動位置）における第１図と同様の
図、第５図及び第６図は本考案を適用し得る３バ
ルブ式内燃機関の動弁系のレイアウトの一例を示
す平面図及び部分断面図。１１……ロツカアーム、１３Ａ……第１アーム
、１３Ｂ……第２アーム、１５……固定軸、１９
……ロツカシヤフト、２１……バルブステム、２
３……カム、２５……カム軸、４０……凹所。 Fig. 1 is an illustrative diagram showing the operation stop mechanism of the intake and exhaust valve (when the valve is open) according to the present invention in the lock position (operating position), Fig. 2 is a plan view of Fig. 1, and Fig. 3 is when the valve is closed. FIG. 4 is a view similar to FIG. 1 in the unlocked position (inoperative position), and FIGS. 5 and 6 are a three-valve internal combustion engine to which the present invention can be applied. FIG. 3 is a plan view and a partial cross-sectional view showing an example of the layout of a valve train. 11... Rotsuka arm, 13A... First arm, 13B... Second arm, 15... Fixed axis, 19
...Rotsukashaft, 21...Valve stem, 2
3...cam, 25...camshaft, 40...recess.

Claims

[Scope of utility model registration request]

A two-part type rocker arm consisting of two separate arms, a first arm that is pivotally supported by the rocker shaft and a second arm that abuts the valve stem, and a two-part rocker arm that abuts the middle part of the upper surface of the rocker arm. and a cam for causing the rocker shaft to swing about the rock shaft as a fulcrum;
The second arm is connected to the rock shaft by a common fixed shaft extending parallel to the fixed shaft so as to be relatively rotatable about the fixed shaft, so that both arms can be bent between the working position where both arms extend integrally and the fixed shaft about the fixed shaft. In an internal combustion engine intake/exhaust valve actuation/stopping mechanism that can selectively take an inoperative position, the axis of the fixed shaft extends further toward the valve stem than a vertical plane including the vertical line of the cam. A recess is formed on the upper surface of the first arm to avoid contact with the cam, so that the cam contacts only the upper surface of the second arm in either the operating position or the non-operating position. An intake/exhaust valve operation stop mechanism characterized by: