Patent ID: 7069890

Claim:
A valve train device for an engine adapted to pivot a rocker arm supported on a rocker arm support shaft to drive a valve which opens and closes a valve opening formed in a combustion chamber, the device comprising a valve drive device, a swing member pivotally supported on a swing member support shaft and driven to pivot about the swing member support shaft by the valve drive device, an intermediate rocker member pivotally supported on the rocker arm support shaft, the intermediate rocker member being provided between a swing cam surface formed on the swing member and a rocker face formed on the rocker arm, for transmitting the movement of the swing cam surface generated by the valve drive device to the rocker face, and an intermediate rocker moving mechanism configured to rotate the rocker arm support shaft and thereby move a first contact point between the intermediate rocker member and the swing cam surface and a second contact point between the intermediate rocker member and the rocker face to continuously vary at least one of the valve opening duration and the amount of valve lift.