| 摘要 |
A rocker arm which supports a free cam follower is rotatably supported by an engine cylinder mounted rocker shaft to lift cylinder valves against valve springs. The rocker arm and the free cam follower are in cooperation with first and second cams on a camshaft. A lever is supported by the rocker arm and has a locked position wherein the lever is in driving engagement with the free cam follower to provide a positive motion connection between the free cam follower and the rocker arm and a released position wherein the lever is out of driving engagement with the free cam follower to provide relative motion of the free cam follower to the rocker arm. A hydraulic piston and a release spring cooperate with each other to shift the lever between the locked position and the released position. For adjusting the shifting operation in timed relationship with motion of the rocker arm, a latch is arranged to restrain motion of the hydraulic piston when the rocker arm is unlifted and until the rocker arm is lifted. <IMAGE> |
