Patent ID: 6832584
Filing Date: 2004-12-21
Classification: F01L

Abstract:
A valve system for an internal combustion engine, comprising:a first rocker arm supported by a first rocker shaft and driven by a first cam, the first rocker arm having an end thereof connected to one of an intake valve and an exhaust valve; a second rocker arm supported by the first rocker shaft such that said second rocker arm rocks when driven by a second cam having a different cam profile from that of the first cam, the second rocker arm being disposed adjacent to said first rocker arm; a connection switching mechanism that switches a state of said first rocker arm between a state of being connected to said second rocker arm and a state of being disconnected from said second rocker arm; a forcing member that forces said second rocker arm toward the second cam while said second rocker arm is rocking in such a manner as to follow a rotating movement of the second cam; a supporting member rotatably supported on a support shaft provided in vicinity of a cylinder head to support said forcing member; and a locking structure that inhibits said supporting member from rotating about the support shaft.