Patent ID: 6725820
Filing Date: 2004-04-27
Classification: F01L

Abstract:
A valve-operating mechanism in an engine, comprising a cam operated in association with a crankshaft, rocker shafts rotatably supported on an engine body, cam followers, each of which is mounted on one of opposite ends of each of said rocker shafts so that tip ends of the cam followers are in slidable contact with the cam, rocker arms, each of which is mounted on the other of opposite ends of the rocker shaft and integrally and coaxially connected to said cam follower via said rocker shaft so that tip ends of the rocker arms are connected to valves mounted in the engine body, and valve springs for biasing said valves in closing directions, whereby said rocker arms are operated in association with the urging of the cam followers by the cam to open said valves against biasing forces of said valve springs,wherein auxiliary springs are connected to said cam followers for biasing and turning said cam followers in the same directions as directions in which said valve springs bias and turn said rocker arms through the valves in a process of closing said valves.