| 摘要 |
Provided is a valve gear with which it is possible to vary the valve opening characteristics of an engine valve in accordance with the operating state of an engine. A valve gear for an engine includes a cam gear (32) having a gear part (321) and a cam part (322), the valve gear opening and closing an engine valve via a cam follower member (33) that abuts against the outer peripheral surface of the cam part (322). The cam gear (32) is rotatably supported on a first support shaft (11) and is capable of moving over the first support shaft (11). The outer peripheral surface of the cam part (322) has a tapered surface part inclined from one end side toward the other end side in the axial direction of the first support shaft (11) (the rotational axis direction of the cam gear (32)). The valve gear moves the cam gear (32) over the first support shaft (11), thereby varying the abutting position of the outer peripheral surface of the cam part (322) and the cam follower member (33) in the axial direction of the first support shaft (11), and varying the valve opening characteristics of the engine valve. |
