| 摘要 |
A valve moving apparatus of an internal combustion engine comprises an engine valve, a valve spring, a spring seat supporting an end of the valve spring and a cam driving the engine valve to open. A valve spring set load changing device in the valve moving apparatus comprises the spring seat including a base seat and a support seat movable relatively to the base seat, an actuator generating drive force in accordance with an operational condition of the engine and a manipulating mechanism transmitting the drive force to the support seat. The actuator and the manipulating mechanism are positioned outside of the spring seat. When the support seat is rotated by a predetermined amount by the drive force transmitted through the manipulating mechanism, the support seat moves also in direction of expansion and contraction of the valve spring to change set load of the valve spring.
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