Patent ID: 9556763
Date: 2017-01-31
CPC Classifications: F01L

Claim:
1. A variable valve lift apparatus comprising: an outer body coupled to a cylinder head arranged between a cam and a valve; an inner body inserted in the outer body to move up and down in the outer body according to rotation of the cam; a valve cylinder inserted in the outer body on a lower side of the inner body to have a first side coupled to the inner body and a second side coupled to the valve for moving up and down on an inside of the outer body; a latching member provided either to the outer body or to the inner body to be operated by a hydraulic pressure for selectively coupling to the outer body and the inner body; a hydraulic chamber formed between the outer body and the inner body and moving the inner body as much as a stroke of a lift of the cam with a hydraulic pressure; a latching flow passage formed in the outer body to supply the hydraulic pressure to the latching member; and an oil removal valve provided to drain a fluid from a space formed between the outer body and the valve cylinder or the inner body depending on a shape of the inner body or the valve cylinder at a time the inner body or the valve cylinder moves up and down, wherein the oil removal valve includes: