Patent ID: 8061314
Filing Date: 2011-11-22
Classification: F01L,Y10T

Abstract:
1. An internal combustion engine valve mechanism comprising: a rocker arm that has a bearing section at one end and a rocker roller at the center region; a lash adjuster that has a pivot, which is to be inserted into the bearing section, and supports one end of the rocker arm; a valve disc that contacts with the other end of the rocker arm; and a transmission member that operates periodically in synchronism with the rotation of a camshaft to periodically press the rocker roller; wherein the direction of a roller pressure force applied to the rocker roller from the transmission member varies with a lift amount of the valve disc; wherein the bearing section and the pivot have different curvatures so that the contact between the bearing section and the pivot forms an osculating circle; and wherein an axis of the osculating circle prevailing in a zero lift state is inclined toward a maximum force transmission point, which transmits greater force than any other point on the osculating circle prevailing in a maximum lift state, in relation to an axis of the lash adjuster.