Patent ID: 9556760
Date: 2017-01-31
CPC Classifications: F01L

Claim:
1. A variable valve actuating mechanism comprising; a camshaft having two concentric cam lobes that may be rotated relative to one another; a summation lever engaging with both of the two concentric cam lobes; a valve actuating rocker pivotally connected by a pivot shaft to the summation lever and engaging with a hydraulic lash adjuster at a first end and with a valve at a second end; and a shim surface movable with a pivot axis of the pivot shaft connecting the summation lever to the valve actuating rocker for limiting expansion of the hydraulic lash adjuster to control clearance in a rocker system including the valve actuating rocker, wherein in order to reduce friction, the shim surface abuts with a stationary stop surface that forms part of a camshaft support bearing: wherein the stationary stop surface is an outer bearing race of a rolling element bearing, a bearing bush or a split bearing shell and the shim surface is on a separate shim component mounted on the pivot shaft connecting the summation lever to the valve actuating rocker.