Valve drive train device

Abstract

In a valve drive train device for an internal combustion engine of a motor vehicle including at least one cam element which is mounted in a rotationally and axially displaceable manner and is provided for actuating at least one gas exchange valve, and at least one gate element which has at least one switch gate for valve lift switching, the switch gate being provided for converting a rotational movement of the cam element into an axial displacement movement of the cam element, a support element is connected to the cam element in a rotationally fixed manner and has at least one limiting structure for limiting the axial displacement movement of the cam element and the gate element is mounted in a rotationally fixed manner but is axially movable for the valve lift switching,

What is claimed is: 
     
         1 . A valve drive train device for an internal combustion engine of a motor vehicle, comprising a camshaft with at least one cam element ( 10   a ,  11   a ,  12   a ;  10   b ) which is mounted in a rotationally and axially displaceable manner and is provided for actuating at least one gas exchange valve, and including a gate element ( 13   a ;  13   b ) which has at least one switch gate ( 14   a ,  15   a ,  16   a ;  14   b ) for valve lift switching, the switch gate being formed for converting a rotational movement ( 17   a ) of the at least one cam element ( 10   a ,  11   a ,  12   a ;  10   b ) into an axial displacement movement ( 18   a ) of the at least one cam element ( 10   a ,  11   a ,  12   a ;  10   b ), at least one support element ( 19   a    19   b ) which is connected to the at least one cam element ( 10   a ,  11   a ,  12   a ;  10   b ) in a rotationally fixed manner and has at least one limiting structure ( 20   a ,  21   a ;  20   b ) that is provided for limiting the axial displacement movement ( 18   a ) of the at least one cam element ( 10   a ,  11   a ,  12   a ;  10   b ), the gate element ( 13   a ;  13   b ) being mounted in a rotationally fixed but axially movable manner for controlling the valve lift switching. 
     
     
         2 . The valve drive train device according to  claim 1 , wherein at least one gate engagement element ( 22   a ,  23   a ,  24   a ;  22   b ) is provided for an operative connection with the at least one switch gate ( 14   a ,  15   a ,  16   a ;  14   b ), which gate engagement element is situated so as to be movable at least essentially perpendicularly with respect to a main axis of rotation ( 25   a ) of the support element ( 19   a ;  19   b ). 
     
     
         3 . The valve drive train device according to  claim 2 , wherein the support element ( 19   a ;  19   b ) has at least one opening ( 26   a ,  27   a ;  26   b ) for forming the limiting structure ( 20   a ,  21   a    20   b ), and the gate engagement element ( 22   a ,  23   a ,  24   a ;  22   b ) at least partially passes through the at least one opening ( 26   a ,  27   a ;  26   b ). 
     
     
         4 . The valve drive train device according to  claim 3 , wherein the at least one opening ( 26   a ,  27   a ) has two axial opening ends ( 28   a ,  29   a ,  30   a ,  31   a ) and the gate engagement element ( 22   a ,  23   a ,  24   a ) for limiting the axial displacement movement is provided to abut the respective opening end ( 28   a ,  29   a ,  30   a ,  31   a ) 
     
     
         5 . The valve drive train device according to  claim 2 , wherein the gate engagement element ( 22   a ,  23   a ,  24   a ;  22   b ) is spring-biased so as to be in continuous contact with the gate element ( 13   a ;  13   b ). 
     
     
         6 . The valve drive train device according to  claim 2 , wherein the at least one cam element ( 10   a ,  11   a ,  12   a ;  10   b ) forms a guide structure ( 32   a .  33   a ;  32   b ) for the gate engagement element ( 22   a ,  23   a ,  24   a ;  22   b ), the guide structure being provided for at least partially accommodating the gate engagement element ( 22   a ,  23   a ,  24   a ;  22   b ). 
     
     
         7 . The valve drive train device according to  claim 2 , wherein the gate engagement element ( 22   a ,  23   a ,  24   a ;  22   b ) and the cam element ( 10   a ,  11   a ,  12   a ;  10   b ) are connected to one another in a rotationally fixed manner. 
     
     
         8 . The valve drive train device according to  claim 2 , comprising at least one guide element ( 34   b ) which is provided for at least partially accommodating the at least one gate engagement element ( 22   b ), and which is formed separately from the cam element ( 10   b ) and at least partially extends through the at least one opening ( 26   b ). 
     
     
         9 . The valve drive train device according to  claim 1 , comprising an actuator unit ( 35   a ) which is provided for displacing the gate element ( 13   a ;  13   b ) only axially for the valve lift switching.