Valve actuating method for internal combustion engine with valve operation suspending function

摘要

Method and apparatus for suspending valve actuation for use in an internal combustion engine is disclosed. Each of intake and exhaust valves is normally actuated by a rocker arm operated by a cam in synchronism with an engine operation. The rocker arm is supported at one end by a supporting member held to a cylinder head by means of a retaining member. The supporting member is selectively floatable with respect to the cylinder head to thereby effect suspension of valve operation. The supporting member is then held at a position where sliding contact between the rocker arm and the cam is prevented.