Patent ID: 7721690

Claim:
A valve actuation mechanism, comprising: a first rocker arm, connect to a first valve, capable of being driven to move by a first cam; a second rocker arm, connected to a second valve; a tappet, arranged at a position between the first and the second rocker arms, capable of being driven to move by a second cam; a first connecting unit, capable of selectively enabling the first rocker arm to connect to/separate from the tappet; a second connecting unit, capable of selectively enabling the second rocker arm to connect to/separate from the tappet; and a power transmission unit, arranged on the first rocker arm at a position corresponding to the first cam for enabling power transmitted from the first cam to be received by the first rocker arm, wherein the power transmission unit further comprises: a can, having a throttling hole and a via hole formed thereon while enabling an accommodation space to be formed between the throttling hole and the via hole; a top pin, arranged in the via hole in a manner that an end of the top pin is oriented corresponding to the first cam while enabling the top pin to slide up and down the via hole; and an oil circuit control unit, connected to the throttling hole, capable of selectively performing a task selected from the group consisting of: filling an oil inside the accommodation space and enabling the oil containing in the accommodation space to be released.