Camshaft adjusting system having a second camshaft which is supported on the stator in the axial direction

Abstract

A camshaft adjusting system ( 1 ) for a first camshaft ( 2 ) and a second camshaft ( 3 ) which are arranged concentrically with respect to one another is provided, with the second camshaft ( 3 ) being arranged within the first camshaft ( 2 ). A hydraulic camshaft adjuster ( 4 ) of the vane cell type is set up to adjust the first camshaft ( 2 ), and an electric camshaft adjuster ( 5 ) is set up to adjust the second camshaft ( 3 ). The second camshaft ( 3 ) is supported in the axial direction on a stator ( 6 ) of the hydraulic camshaft adjuster ( 4 ). Further, a camshaft adjusting unit is provided including the camshaft adjusting system ( 1 ) and two camshafts ( 2, 3 ).

1 . A camshaft adjusting system for a first camshaft and a second camshaft which are arranged concentrically with respect to one another, the second camshaft being arranged within the first camshaft, the camshaft adjusting system comprising:
 a hydraulic camshaft adjuster of the vane-cell type configured to adjust the first camshaft, the hydraulic camshaft adjuster including a stator;   an electric camshaft adjuster configured to adjust the second camshaft; and   the stator including a support that is adapted to axially support the second camshaft.   
     
     
         2 . The camshaft adjusting system as claimed in  claim 1 , further comprising a front cover fastened to the stator of the hydraulic camshaft adjuster that closes the hydraulic camshaft adjuster on a side which faces away from the camshafts, the front cover including an internal toothing system that supports a flex pot that is adapted to be connected to the second camshaft and is configured to transmit torque from the electric camshaft adjuster. 
     
     
         3 . The camshaft adjusting system as claimed in  claim 2 , wherein the front cover is an integral constituent part of the stator. 
     
     
         4 . The camshaft adjusting system as claimed in  claim 2 , wherein the front cover is a component that is separate from the stator. 
     
     
         5 . The camshaft adjusting system as claimed in  claim 2 , wherein the front cover is divided into a stop component and a toothing component which is separate from the stop component. 
     
     
         6 . The camshaft adjusting system as claimed in  claim 5 , wherein the stop component has a shoulder which is adapted to prevent an axial movement of at least one of the flex pot or an anti-friction bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster. 
     
     
         7 . The camshaft adjusting system as claimed in  claim 5 , wherein the stop component engages around the front cover. 
     
     
         8 . The camshaft adjusting system as claimed in  claim 7 , wherein a frictionally locking connection is configured between the stop component and the front cover. 
     
     
         9 . The camshaft adjusting system as claimed in  claim 2 , wherein the front cover includes both a stop and a toothing section. 
     
     
         10 . The camshaft adjusting system as claimed in  claim 9 , wherein the stop has a shoulder which is adapted to prevent an axial movement of at least one of the flex pot or an anti-friction bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster. 
     
     
         11 . The camshaft adjusting system as claimed in  claim 2 , further comprising an adapter part configured to conduct oil arranged in an axial direction between a rotor of the hydraulic camshaft adjuster and the flex pot. 
     
     
         12 . The camshaft adjusting system as claimed in  claim 2 , further comprising an intermediate part by which the flex pot is adapted to be connected to the second camshaft. 
     
     
         13 . A camshaft adjusting unit, comprising:
 a first camshaft;   a second camshaft arranged concentrically within the first camshaft; and   a camshaft adjusting system comprising:
 a hydraulic camshaft adjuster of the vane-cell type connected to the first camshaft, the hydraulic camshaft adjuster including a stator; 
 an electric camshaft adjuster that connected to the second camshaft; and 
 the stator including a support that axially supports the second camshaft. 
   
     
     
         14 . The camshaft adjusting unit as claimed in  claim 13 , further comprising a front cover fastened to the stator of the hydraulic camshaft adjuster that closes the hydraulic camshaft adjuster on a side which faces away from the camshafts, the front cover including an internal toothing system that supports a flex pot that is adapted to be connected to the second camshaft and is configured to transmit torque from the electric camshaft adjuster. 
     
     
         15 . The camshaft adjusting unit as claimed in  claim 14 , wherein the front cover is an integral constituent part of the stator. 
     
     
         16 . The camshaft adjusting unit as claimed in  claim 14 , wherein the front cover is a component that is separate from the stator. 
     
     
         17 . The camshaft adjusting unit as claimed in  claim 14 , wherein the front cover is divided into a stop component and a toothing component which is separate from the stop component. 
     
     
         18 . The camshaft adjusting unit as claimed in  claim 17 , wherein the stop component has a shoulder which is adapted to prevent an axial movement of at least one of the flex pot or an anti-friction bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster. 
     
     
         19 . The camshaft adjusting unit as claimed in  claim 17 , wherein the stop component engages around the front cover. 
     
     
         20 . The camshaft adjusting unit as claimed in  claim 19 , wherein a frictionally locking connection is configured between the stop component and the front cover.