| 摘要 |
The invention relates to valve control means for a push-rod internal combustion engine. With reference to FIG. 8 of the drawings, the valve control means comprises valve means, cam means comprising a camshaft having a first cam member and a second cam member having a different profile from the first cam member, and means for transmitting reciprocating movement to the valve means from the cam means. The means for transmitting reciprocating movement comprises a first cam follower member in engagement with the push-rod and a second cam follower member movable relative to the first cam follower member, and locking means to enable the follower members to be linked to move together. When the cam follower members are not linked the valve means is controlled by the first cam follower member in engagement with and following the profile of the first cam member, and when the cam follower members are linked the valve means is controlled by the second cam follower member in engagement with and following the profile of the second cam member.
|
