Patent ID: 8701608

Claim:
A variable valve lift device of an internal combustion engine, comprising a roller-rocker arm lift mechanism, a cam and a roller of the mechanism cooperating with each other to facilitate the control of a valve lift, and further comprising: a driving mechanism, which outputs a straight-line displacement driving force; and the roller-rocker arm lift mechanism further comprising: a second rocker arm, wherein one end of the second rocker arm is connected with an output portion of the driving mechanism through a rotation pin so as to create a straight-line displacement by the driving force of the driving mechanism; the second rocker arm is provided with a slide track in the direction of the straight-line displacement; a rocker-arm pin in the center of valve rocker arms of the roller-rocker arm lift mechanism is arranged in the slide track of the second rocker arm; the rocker-arm pin is slidable in the slide track of the second rocker arm; and wherein the roller-rocker arm lift mechanism further comprises a first rocker arm which has one end hinged to the rocker-arm pin and the other end hinged to a roller pin of the roller, and wherein the roller pin is arranged in the slide track of the second rocker arm after protruding out of the other end of the first rocker arm; and the roller pin is slidable in the slide track of the second rocker arm.