| 摘要 |
A rocker arm mountable on an engine rocker shaft for transmitting the rotational motion of a cam on a camshaft into the linear motion of a valve lifter. The rocker arm includes a first cam engaging arm mountable on the rocker shaft for pivotal movement about the shaft. A second valve lifter engaging arm is provided that is also mountable on the rocker shaft for pivotal movement about the shaft. Both arms share a common pivoting axis when mounted on the rocker shaft. A coupling system is interposed between the first and second arms to adjust the relative pivotal positions of the arms with respect to each other on the rocker shaft in order to vary the overall rocker arm shape and to releasably lock the first and second arms together for movement as a single unit when following the cam.
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