Patent ID: 8201530

Claim:
A valve drive for an internal combustion engine including a camshaft comprising cams for actuating gas-exchange valves, at least one axially displaceable cam, which comprises several cam faces, is guided nonrotatably but with freedom of axial movement on the camshaft, a stroke profile, which cooperates with an actuating pin for the axial displacement of the cam or cam piece, is assigned to said at least one axially displaceable cam or an axially displaceable cam piece comprising several cams, and said stroke profile of said axially displaceable cam or said cam piece comprises several stroke curves, a first stroke curve and a second stroke curve of the stroke profile are contoured both in an axial direction and in a radial direction such that a contour in an axial direction of the stroke profile of the cam shaft is responsible for a defined axial displacement of said at least one axially displaceable cam or cam piece and the contour in a radial direction of the stroke profile of the cam shaft prevents the first and second stroke curves from colliding, and either the axially displaceable cam or the cam piece is a sleeve including a single channel in which the actuating pin is positioned, the first stroke curve is a shoulder of the sleeve that extends from one end of the channel toward the second stroke curve, and the second stroke curve is another shoulder of the sleeve that extends from an opposing end of the channel toward the first stroke curve.