Valve train for actuating gas exchange valves of an internal combustion engine

Abstract

A valve train for actuating gas exchange valves of an internal combustion engine may include a first camshaft that is received such that it can be rotated in a first shaft axis, and a second camshaft that is received such that it can be rotated in a second shaft axis. At least one of the camshafts may be configured as an adjustable camshaft that comprises an outer shaft in which an inner shaft is received such that it can be rotated. At least one of the camshafts may be drive-connected via a drive means to a crankshaft of the internal combustion engine. A phase shifting member may be provided by way of which the phase position of at least one inner shaft can be changed relative to the phase position of at least one outer shaft of the camshaft. The phase shifting member may comprise an arrangement that is spaced apart from both shaft axes.”

1 .- 11 . (canceled) 
     
     
         12 . A valve train for actuating gas exchange valves of an internal combustion engine, the valve train comprising:
 a first camshaft received such that the first camshaft is rotatable in a first shaft axis;   a second camshaft received such that the second camshaft is rotatable in a second shaft axis, wherein at least one of the first camshaft or the second camshaft is configured as an adjustable camshaft and comprises an outer shaft in which an inner shaft is rotatably received, wherein at least one of the first camshaft or the second camshaft is drive-connected via a drive means to a crankshaft of the internal combustion engine; and   a phase shifting member by way of which a phase position of the inner shaft is changeable relative to a phase position of the outer shaft, wherein the phase shifting member includes an arrangement spaced apart from the first and second shaft axes.   
     
     
         13 . The valve train of  claim 12  wherein the phase shifting member comprises a stator and a rotor, wherein the stator and the rotor are rotatable in a common shifting axis, the common shifting axis being spaced apart from and parallel to the first and second shaft axes. 
     
     
         14 . The valve train of  claim 13  wherein the phase shifting member is operatively connected via a first transmission means to the inner shaft, wherein the first transmission means is connected to the rotor of the phase shifting motor. 
     
     
         15 . The valve train of  claim 12  wherein the phase shifting member is operatively connected via a first transmission means to the inner shaft. 
     
     
         16 . The valve train of  claim 15  wherein the phase shifting member is operatively connected via a second transmission means to the outer shaft of one of the first camshaft or the second camshaft. 
     
     
         17 . The valve train of  claim 16  wherein the second transmission means is connected to a stator of the phase shifting member. 
     
     
         18 . The valve train of  claim 16  wherein the phase shifting member comprises a stator and a rotor, wherein the stator and the rotor are rotatable in a common shifting axis, the common shifting axis being spaced apart from and parallel to the first and second shaft axes, wherein the second transmission means is connected to the stator of the phase shifting member. 
     
     
         19 . The valve train of  claim 18  wherein the second transmission means between the outer shaft of one of the first camshaft or the second camshaft and the phase shifting member is configured as a gearwheel pairing with a first gearwheel and a second gearwheel. 
     
     
         20 . The valve train of  claim 12  wherein the first camshaft is configured as the adjustable camshaft and comprises the outer shaft in which the inner shaft is rotatably received, wherein the second camshaft is configured as an adjustable camshaft and comprises an outer shaft and an inner shaft, wherein a first transmission means couples the inner shaft of the first camshaft to the inner shaft of the second camshaft such that the phase position of the inner shaft of the first camshaft cannot be changed relative to a phase position of the inner shaft of the second camshaft. 
     
     
         21 . The valve train of  claim 20  wherein the outer shafts of the first and second camshafts can be driven jointly by the crankshaft of the internal combustion engine by way of the drive means. 
     
     
         22 . The valve train of  claim 20  wherein the first transmission means between the inner shafts and the phase shifting member is configured as respective gearwheel pairings with a first gearwheel and with a second gearwheel. 
     
     
         23 . The valve train of  claim 12  wherein the phase shifting member comprises a stator and a rotor, wherein the stator and the rotor are rotatable in a common shifting axis, the common shifting axis being spaced apart from and parallel to the first and second shaft axes, wherein the common shifting axis forms a triangular arrangement with the first and second shaft axes.