Patent ID: 7631622

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, 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, 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, wherein the cam contact portion is a roller which is provided on a support shaft which is provided rotatably on an arm portion of the rocker member, wherein the acting portion is a protruding portion which protrudes from the shaft portion at an opposite end to the roller across the arm portion, and wherein the protruding portion forms an oil reservoir portion for reserving lubricating oil for supply to a sliding portion between the arm portion and the support shaft.