| 摘要 |
<p>A valve moving mechanism for a four-cycle engine of a vehicle is operatively connected to a crank shaft (c) of the engine and adapted to move intake and exhaust valves (1, 2). A cam shaft (6) of the valve moving mechanism is operatively connected to the crank shaft (c) and cam means including first (3), second (4) and third (5) cams is mounted on the cam shaft (6), the second (4) and third (5) cams having outer profiles different from that of the first cam (3) disposed between the second (4) and third (5) cams. Rocker arm means is mounted to be rotatable on the rocker shaft (11) supported to be rotatable and includes first (7), second (8) and third (9) rocker arms driven in engagement with the first (3), second (4) and third (5) cams, respectively. The rocker arm means is operatively connected to the intake and exhaust valves (1, 2), the first, second and third rocker arms having supporting bases (7a, 8a, 9a) mounted on the rocker shaft (11). Bush means (12, 13) is mounted on the rocker shaft (11) to be selectively in engagement with the first (7), second (8) and third (9) rocker arms and has an axis eccentric with an axis of the rocker shaft (11).</p> |
