Patent ID: 7905207

Claim:
A variable valve lift apparatus, comprising: a camshaft including an input cam co-axially mounted thereon; a rocker arm shaft disposed in parallel with the camshaft with a predetermined distance therebetween; a shaft carrier, wherein the camshaft is rotatably coupled to a first side of the shaft carrier and the rocker arm shaft is pivotally coupled to a second side thereof; a rocker arm that is pivotally coupled to the rocker arm shaft and includes a first roller disposed at one end portion of the rocker arm and contacting the input cam; a first link pivotally coupled to the other end portion of the rocker arm; an amplification lever pivotally coupled to one end portion of the first link, wherein one end portion of the amplification lever is coupled to the shaft carrier; a second link, one end portion of which is pivotally coupled to the other end of the amplification lever; an output cam, a first end portion of which is rotatably coupled to the camshaft and a second end portion of which is pivotally coupled to the other end portion of the second link, wherein a profile portion is formed at one side of an exterior circumference of the output cam; a variable driveshaft coupled to the rocker arm shaft and rotating the shaft carrier by a predetermined angle; and a valve that is moved by the profile portion of the output cam according to rotation of the output cam.