| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fuel-efficient and low cost valve opening/closing device by shifting the opening/closing timing of a plurality of intake/exhaust valves of a cylinder of an internal combustion engine.SOLUTION: The valve opening/closing mechanism comprises: a cam shaft of the internal combustion engine; a plurality of intake valves 55A and 55B for opening/closing an air supply passage 35 communicating the interior of the cylinder 22 with ambient air; a rocker arm drivingly fluctuating by the rotation of the cam shaft; and a valve bridge interposed between the rocker arm and the intake valves and bridges between the plurality of intake valves for opening/closing the plurality of intake valves by a pressing force due to the drivingly fluctuating rocker arm, in which in a valve bridge press position by the rocker arm, the opening/closing timing of the plurality of intake valves is shifted by setting the distances between the press position and the plurality of valves to be non-equidistant.</p> |
