Patent ID: 6568361
Filing Date: 2003-05-27
Classification: F01L

Abstract:
A valve operating device for an internal combustion engine enabling both valve timing and valve lift characteristic to be varied depending on engine operating conditions, comprising:intake and exhaust camshafts; an eccentric cam fixedly connected to a first one of the intake and exhaust camshafts so that an axis of the eccentric cam is eccentric to an axis of the first camshaft; a rockable cam supported on the first camshaft so that the rockable cam rotates or oscillates about the axis of the first camshaft; a rocker arm oscillatingly supported on an outer periphery of the eccentric cam so that a center of an oscillating motion of the rocker arm revolves around the axis of the first camshaft; and a control shaft that variably controls the center of the oscillating motion of the rocker arm.