Rotor of a camshaft adjuster, camshaft adjuster with such a rotor, and method for producing a rotor

Abstract

A camshaft adjuster ( 1 ) with a rotor ( 2 ) and a stator ( 3 ). The rotor ( 2 ) has a connecting region ( 7 ) for fixing a camshaft in a non-rotatable manner, and the rotor ( 2 ) is at least partly made of a sinter material and has an oxide layer ( 11 ) which is produced by supplying steam during the production process.—A method for producing a rotor ( 2 ) for a camshaft adjuster ( 1 ), said rotor ( 2 ) being at least partly made of a sinter material, wherein at least one sinter material application area ( 7 ) which is provided for applying a camshaft is supplied with steam.

What is claimed is: 
     
         1 - 10 . (canceled) 
     
     
         11 . A camshaft adjuster comprising:
 a rotor; and   a stator;   the rotor having a connecting area for the rotationally fixed fastening of a camshaft, the rotor being made of a sintered material at least in some sections, the rotor having an oxide layer created by water vapor application during production.   
     
     
         12 . The camshaft adjuster as recited in  claim 11  wherein the oxide layer is a friction-increasing oxide layer present on the surface of the connecting area. 
     
     
         13 . The camshaft adjuster as recited in  claim 11  wherein the oxide layer is formed from a section of a front face of the rotor facing the camshaft. 
     
     
         14 . The camshaft adjuster as recited in  claim 13  wherein the section having the oxide layer is a surface of a bottom of a central recess in the rotor running transversely to an axis of rotation of the rotor. 
     
     
         15 . The camshaft adjuster as recited in  claim 14  wherein the section having the oxide layer is the surface of the bottom of the central recess in the rotor running orthogonally to the axis of rotation of the rotor. 
     
     
         16 . The camshaft adjuster as recited in  claim 14  wherein the bottom forms a stop for the camshaft acting in the longitudinal direction of the rotor. 
     
     
         17 . The camshaft adjuster as recited in  claim 11  wherein the rotor is strengthened by water vapor induction in at least some areas. 
     
     
         18 . The camshaft adjuster as recited in  claim 11  wherein the rotor is produced from a sintered material or is prepared for a screw connection with the camshaft. 
     
     
         19 . The camshaft adjuster as recited in  claim 11  wherein the rotor is produced from the sintered material, the sintered material being metallic. 
     
     
         20 . The camshaft adjuster as recited in  claim 11  wherein the stator has the oxide layer, the oxide layer being a friction-increasing oxide layer on at least one or both front faces due to water vapor application. 
     
     
         21 . A method for producing a rotor for a camshaft adjuster, the rotor being made of sintered material at least in some sections, the method comprising treating with water vapor at least one use area of the sintered material for use with a camshaft. 
     
     
         22 . The method as recited in  claim 21  wherein an oxide layer created by the treating with water vapor is left on the surface of the rotor, so that the oxide layer is connected to the camshaft in a force-locking manner in the installed state of the rotor inside a stator.