| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve train structure for an engine capable of reducing the weight and size of the engine, of opening and closing an intake valve and an exhaust valve at accurate timing even when the engine is driven at high speed, and of reducing load resistance when the intake valve and the exhaust valve are opened and closed. SOLUTION: This valve train structure for the engine is provided with pulleys 40a, 40b (rotors) rotating with interlocking with rotation of a crankshaft and having annular cam grooves 43a, 43b formed thereon. Rocker arms 50a, 50b are connected to the intake valve 20 or the exhaust valve 30 at one ends and attached into the cam grooves 43a, 43b at another ends. The rocker arms 50a, 50b are guided by the cam grooves 43a, 43b and are inclined when the pulleys 40a, 40b are rotated to open and close the intake valve 20 and the exhaust valve 30. COPYRIGHT: (C)2009,JPO&INPIT
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