| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a variable valve timing valve gear for an onboard internal combustion engine which can protect an actuator from the external force without the need of using a dedicated shielding member and can shield the operation noise of the actuator. <P>SOLUTION: The variable valve timing valve gear includes a variable valve timing driving mechanism (60) for changing valve timing by transmitting drive of an actuator (61) to a slider mechanism (52). An internal combustion engine is suspended on a body frame (2) of a saddle riding type vehicle in a state with the cylinder inclined slightly to the front side. A fuel tank (6) supported by the body frame (2m) in a state astride from above covers the internal combustion engine from above so that a head cover (20) faces the bottom plate of the fuel tank (6). The actuator (61) is supported on the head cover (20) with the upper part covered with the fuel tank (6) to be disposed at a position superimposed with a movable valve camshaft (41) when it is viewed in the cylinder axial direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
