Multiple variable valve lift apparatus

摘要

A multiple variable valve lift apparatus may include a camshaft rotating by drive of an engine, at least two cam portions disposed on the camshaft to be movable along an axial direction of the camshaft and to be rotated together with the camshaft, and forming a high cam and a low cam, a valve opening/closing unit operated by one of the high cam or the low cam formed at the cam portion, an operating unit disposed on the camshaft to move together with one of the at least two cam portions, a solenoid selectively moving the operating unit along an axial direction of the camshaft, a interlock unit rotating together with the camshaft, and disposed between one and the other of the cam portions on the camshaft to be movable along an axial direction of the camshaft, and a pin operating unit selectively moving the interlock unit along the camshaft.

主权项

1. A multiple variable valve lift apparatus, comprising:
a camshaft rotating by drive of an engine; at least two cam portions separately disposed on an exterior circumference of the camshaft to be independently movable along an axial direction of the camshaft and rotatably together with the camshaft, and forming a high cam and a low cam; a valve opening/closing unit operated by one of the high cam or the low cam formed at the cam portions; an operating unit disposed on the exterior circumference of the camshaft so as to move together with one of the at least two cam portions; a solenoid selectively moving the operating unit along the axial direction of the camshaft; an interlock unit rotating together with the camshaft, and disposed between one and the other of the cam portions on the exterior circumference of the camshaft to be movable along the axial direction of the camshaft; and a pin operating unit selectively moving the interlock unit along the axial direction of the camshaft, wherein the interlock unit is moved along the axial direction as one of the cam portions moves along the axial direction, and the other of the cam portions is moved along the axial direction of the camshaft as the interlock unit moves along the axial direction, and wherein at least of a gap between the one cam portion and the interlock unit or a gap between the other cam portion and the interlock unit is adapted apart from each other according to relative movement of the one cam portion, the interlock unit, and the other cam portion.