Ventilantrieb für eine Brennkraftmaschine

摘要

In a valve-moving apparatus for an internal combustion engine, lever members (30) are integrally formed with rocker shaft parts (22) and arm parts (33), the lever members are provided with large-diameter parts (10) larger in diameter than support parts, disposed between support parts of the rocker shaft parts (22) supported by support members of the engine and the arm parts; rocker arms (34, 35) driven by cams (14, 15) are rotatably supported on the large-diameter parts (10) ; and change-over mechanisms for selectively engaging the large-diameter parts (10) and the rocker arms (34, 35) are disposed in the large-diameter parts (10), thereby improving rigidity of the large-diameter parts (10) and achieving improved reliability of the change-over mechanisms.