Patent ID: 7926456

Claim:
A continuously variable valve lift system comprising: an input cam; a drive shaft positioned substantially in parallel with the input cam; a lifter disposed at the drive shaft and pivoting around the drive shaft in response to a rotation of the input cam; an output cam disposed at the drive shaft coaxially with the lifter and pivoting around the drive shaft, the output cam comprising a contact portion and a lift activation portion; a valve unit configured to be opened or closed by the lift activation portion of the output cam; a return spring supplying restoring force to the contact portion of the output cam; and an adjusting unit disposed substantially at the drive shaft and adjusting a distance between the drive shaft and a contact point formed between the adjusting unit and the contact portion of the output cam; wherein the lifter comprises a first hand and a second hand, wherein an angle between the first hand and the second hand is obtuse and a distal end portion of the first hand is substantially above the drive shift; and wherein the adjusting unit comprises: an input shaft comprising a first slot formed along a longitudinal direction thereof and disposed within the drive shaft; a controlling unit connected with the input shaft and selectively rotating the input shaft; at least a moving shaft positioned in the input shaft, a protrusion of the moving shaft movably disposed to the first slot; at least a second slot formed to the drive shaft, the second slot inclining with a predetermined angle with respect to a longitudinal direction of the drive shaft, wherein the protrusion of the moving shaft is inserted through the second slot; at least a side body comprising a mounting portion and a first wedge portion, the side body movable along a longitudinal direction of the drive shaft and including a third slot formed at a circumference of the mounting portion enclosing a portion of the drive shaft, wherein the protrusion of the moving shaft is inserted through the third slot; and an upper body contacting the contact portion of the output cam, the upper body movable from or to the drive shaft according to movement of the side body, wherein the upper body comprises a mounting body and a second wedge portion and a shaft hole is formed at the mounting body in a longitudinal direction of the mounting body.