Patent ID: 9145835
Filing Date: 2015-09-29
Classification: F01L,F02D

Abstract:
1. An internal combustion engine valve drive device for a motor vehicle, having at least one camshaft ( 24 a , 24 b ) which includes at least first and second cam elements ( 12 a , 13 a , 12 b , 13 b ) with gate tracks ( 31 a , 32 a , 33 a , 34 a , 31 b , 32 b , 33 b , 34 b ) for lift switching of valves of the internal combustion engine by converting a rotary motion ( 11 a ; 11 b ) of the cam elements ( 12 a , 13 a ; 12 b , 13 b ) into an axial motion ( 14 a ; 14 b ), each cam element ( 12 a , 13 a ; 12 b , 13 b ) being provided with a first actuator ( 15 a , 17 a ; 15 b , 17 b ) for axially displacing the first cam element ( 12 a , 12 b ; 13 a , 13 b ) in one switching direction ( 16 a ; 16 b ), and a second actuator ( 20 a , 22 a ; 20 b , 22 b ) for axially displacing a second cam element ( 13 a ; 13 b ) in an opposite switching direction ( 21 a , 21 b ), and a control unit ( 18 a ; 18 b ) for controlling an axial displacement of the first and second cam elements ( 12 a , 13 a ; 12 b , 13 b ) in the said one switching direction ( 16 a ; 16 b ), the control unit ( 18 a ; 18 b ) being provided for simultaneously initiating an axial displacement of the first actuators ( 15 a , 17 a ; 15 b , 17 b ) and an axial displacement of the second actuators ( 20 a , 22 a , 20 b , 22 b ).