Suzuki Kabushiki Kaisha

Shinji Kaku

Tatsuya Shinkai

A valve actuating mechanism disposed in a four-stroke cycle engine within which exhaust and intake valves are disposed, comprises a rocker shaft rotatably supported upon a cylinder head of an engine unit and having eccentric large-diameter portions formed as bushings upon the rocker shaft, rocker arms including a first rocker arm rotatably mounted directly upon the rocker shaft and second and third rocker arms rotatably mounted upon the bushings with the first rocker arm being interposed therebetween, and a cam assembly including first, second and third cam members which drives the first, second and third rocker arms, respectively. The second and third cams have the same cam profiles and the first cam has a cam profile different from those of the second and third cams. A driving mechanism for rotating the rocker shaft is connected to one end of the rocker shaft and comprises a hydraulic cylinder, a rack connected thereto and a pinion formed upon the one end of the rocker shaft so as to be engaged with the rack from the upper side of the cylinder head. A stopper mechanism for controlling the rotational and sliding position of the rocker shaft is composed of a stopper hole formed within the cylinder head, a stopper screw engaged with the stopper hole and a stopper member disposed upon the other end portion of the rocker shaft.

Growing community of inventors

Higashiwakabayashi, Japan

Shinji Kaku