Patent ID: 6431135
Filing Date: 2002-08-13
Classification: F01L

Abstract:
A valve operating system in an internal combustion engine, comprising a cylindrical swinging support section provided at a base end of a rocker arm and swingably carried on a rocker shaft mounted in a cylindrical head, a plurality of boss portions formed at a tip end of said rocker arm and aligned in a directional parallel to an axis of said rocker shaft, tappet screws being threadedly fitted into said boss portions and capable of being individually put into abutment against upper ends of a plurality of engine valves, and a cam abutment provided on said rocker arm in an intermediate portion between said swinging support section and said boss portions to come into contact with a valve operating cam, wherein said boss portions are interconnected by a connection wall having a plurality of wall portions which intersect each other at right angles in a plane perpendicular to the axis of said rocker shaft.