Patent ID: 8726861
Filing Date: 2014-05-20
Classification: F01L

Abstract:
1. A variable valve lift apparatus comprising: a camshaft; a plurality of low lift cams which is are connected to the camshaft and rotate; a plurality of high lift cams which are mounted on the camshaft and rotatable with respect to the camshaft, wherein the high lift cams are selectively connected to the camshaft to rotate with the camshaft; a high lift cam connecting portion which selectively connects the high lift cams to the camshaft; and a tappet comprising a low lift cam contact portion contacting the low lift cam and a high lift cam contact portion selectively activating the high lift cam; wherein the high lift cam contact portion includes a slanted portion which is protruded from the low lift cam contact portion and shaped as a curved surface; wherein exterior surfaces of the high lift cams are slanted corresponding to the slanted portion; and wherein a lost motion spring is disposed on the camshaft between the high lift cams mounted on the camshaft for elastically biasing the high lift cams along an axial direction of the camshaft.