VALVE GEAR OF INTERNAL COMBUSTION ENGINE

摘要

A valve gear of an internal combustion engine, wherein a swing cam performs reciprocating motion by swinging about a swing shaft in a specified range, and a rocker arm performs reciprocating motion by swinging interlockingly with the swing cam in a specified range. A roller for interlocking the swing of the swing cam with the rocker arm is fitted to the rocker arm, and a cam face in contact with the roller is formed on the swing cam. When the roller is positioned at the base circular part of the cam face, a clearance is formed between parts on the downstream side of the contact portion of the roller with the cam face in a force transmitting route. The valve gear comprises a spring member to always bring the roller into contact with the cam face while the swing cam and the rocker arm perform the reciprocating operation