Patent ID: 7451729
Filing Date: 2008-11-18
Classification: F01L

Abstract:
1. A variable valve mechanism, comprising: a rotating cam that is provided on a camshaft; a swing arm that contacts with the rotating cam to swing; a drive arm that drives a valve in conjunction with the swing arm; a variable arm that turns the drive arm around a swing axis of the swing arm; an actuator that drives the variable arm; and a cam device that is provided between the swing arm and the drive arm; wherein the variable arm is provided so as to be able to rotate relatively around the swing axis as the swing arm, wherein the cam device changes the initial position of the drive arm with respect to the swing arm accompanying the turning of the drive arm, wherein the variable arm and the swing arm are supported so as to be able to rotate relatively to each other on a support shaft, wherein a control shaft is separate from the support shaft and is linked to the actuator, wherein a control cam that drives the variable arm is provided on the control shaft, and wherein a shim is interposed between the control cam and the variable arm.