Patent ID: 8720398
Filing Date: 2014-05-13
Classification: F01L

Abstract:
1. A continuous variable valve lift apparatus comprising: an input cam disposed to an input shaft; a valve elastically supported by a valve spring; a rocker arm of which an end is connected with the valve and the other end is slidably engaged to a rocker ratio change guide; and an elastic member disposed between the other end of the rocker arm and the rocker ratio change guide for supplying a restoring force to the rocker ratio change guide; wherein the rocker ratio change guide is movable along a length direction of the rocker arm; wherein the input cam is engaged to a side of the rocker arm and the rocker arm rotates around the rocker ratio change guide according to a rotation of the input cam so as to open and close the valve; wherein a control portion selectively varies a relative distance between the rocker ratio change guide and the end of the rocker arm; wherein the control portion includes: wherein a rocker arm insert hole is formed to the rocker ratio change guide; wherein an elastic portion insert hole is formed to the other end of the rocker arm and the other end of the rocker arm is slidably inserted into the rocker arm insert hole; and wherein the elastic member is disposed within the elastic portion insert hole and the rocker arm insert hole.