Patent ID: 8474424
Filing Date: 2013-07-02
Classification: F01L

Abstract:
1. A valve drive train device, of an internal combustion engine including a camshaft ( 35 a ) with at least one axially displaceable first cam element ( 11 a , 11 b ) having axially overlapping movable first and second cam element sections ( 11 a , 12 a ; 11 b , 12 b ) provided with a shift gate ( 13 a, 13 b ) for sequentially displacing the first cam element section ( 11 a , 11 b ) and the second cam element section ( 12 a , 12 b ) on the camshaft ( 35 a ), and an actuating device ( 10 a , 10 b ) for displacing the axially displaceable cam element sections ( 11 a , 12 a ; 11 b , 12 b ) by means of the shift gate ( 13 a ; 13 b ) to at least three switching positions, the shift gate ( 13 a ; 13 b ) having at least two gate tracks ( 36 a , 37 a ; 36 b , 37 b ), each including four switch segments ( 14 a - 21 a ; 14 b - 21 b ) and the switch segments being assigned to a gate track ( 36 a , 37 a: 36 b , 37 b ) of a switching direction, the gate tracks ( 36 a , 37 a ; 36 b , 37 b ) extending over a rotational angle in excess of 360° and being arranged in each case partially on the first cam element section ( 11 a ; 11 b ) and partially on the second cam element section ( 12 a , 12 b ).