Patent ID: 7980215

Claim:
A variable valve system for an internal combustion engine, comprising: a valve cam which actuates an engine valve of the internal combustion engine; a transmission mechanism which transmits a valve actuating force of the valve cam to the engine valve and changes a maximum lift amount of the engine valve by being driven by a control member; and a biasing member which generates a biasing force which brings the transmission mechanism into contact with the valve cam, wherein the transmission mechanism comprises: a holder actuated by the control member; and a rocker member oscillatably supported on the holder and disposed in an accommodating space defined by a frame-shaped member of said holder, wherein the rocker member comprises: a cam contact portion which contacts with the valve cam at a cam contact point; an output portion which outputs the actuating force which is inputted from the valve cam into the cam contact portion, to the engine valve; and an acting portion which contacts with the biasing member at a biased contact portion, and wherein the acting portion is provided in the vicinity of the cam contact portion in such a manner that: the biased contact point is situated closer to the cam contact point than a rocking center line of the rocker member, and an acting line of the biasing force is superposed on the cam contact portion as viewed from a direction of the rocking center line.