| 摘要 |
The present invention relates to a multi-variable valve lift apparatus which has a simple structure and can be applied to an engine having a narrow interval between two valves. The multi-variable valve lift apparatus according to an embodiment of the present invention comprises: a cam shaft which is rotated by the driving of an engine; a cam forming unit which is formed in a cylindrical shape having a hollow part where the cam shaft is inserted, is able to move in the axial direction of the cam shaft while rotating with the cam shaft, and forms a zero cam and a normal cam; a valve opening and closing device which is operated by any one between the zero cam and the normal cam formed in the cam forming unit; an operation unit which is arranged in the outer circumference of the cam shaft in order to move with the cam forming unit; and a solenoid which selectively moves the operation unit in the axial direction of the cam shaft. A journal unit can be formed in the cam forming unit to have the same radius as the zero cam so that a cam cap surrounds the outer circumference. |
