Camshaft adjusting device

Abstract

A camshaft adjusting device having a vane-type adjuster, which includes a stator which is rotatably drivable by a crankshaft; and a rotor which is rotatably supported in the stator and is connectable to a camshaft, a plurality of radially inwardly projecting projections, which divide an annular space between the stator and the rotor into multiple pressure chambers, being provided on the stator; and a plurality of radially outwardly projecting vanes, which divide the pressure chambers into oppositely acting working chambers, being provided on the rotor; a pressure medium being applicable to the working chambers to optionally adjust the rotor with respect to the stator via a central valve, the central valve being integrally connected to the rotor or to the stator or to a component which is rotatably fixedly connected to one of the two parts.

What is claimed is: 
     
         1 . A camshaft adjusting device having a vane adjuster, the camshaft adjusting device comprising:
 a stator rotatably drivable by a crankshaft;   a rotor rotatably supported in the stator and connectable to a camshaft;   a plurality of radially inwardly projecting projections dividing an annular space between the stator and the rotor into multiple pressure chambers and being provided on the stator;   a plurality of radially outwardly projecting vanes dividing the pressure chambers into oppositely acting working chambers and being provided on the rotor;   a pressure medium being applicable to the working chambers to selectively adjust the rotor with respect to the stator via a central valve, the central valve being integrally connected to the rotor or to the stator or to a component connected in a rotationally fixed manner to the rotor or the stator.   
     
     
         2 . The camshaft adjusting device as recited in  claim 1  wherein the integral connection is a welded connection. 
     
     
         3 . The camshaft adjusting device as recited in  claim 1  wherein the component is a cover of the stator and the central valve is integrally connected to the cover of the stator. 
     
     
         4 . The camshaft adjusting device as recited in  claim 3  wherein the central valve has a radially outwardly projecting radial flange situated on a front side. 
     
     
         5 . The camshaft adjusting device as recited in  claim 4  wherein the central valve is integrally connected to the sealing cover in a radially outer section of the radial flange. 
     
     
         6 . The camshaft adjusting device as recited in  claim 4  wherein the radial flange is dimensioned to overlap a side surface of the rotor. 
     
     
         7 . The camshaft adjusting device as recited in  claim 1  wherein the rotor has a central through-opening, the central valve being situated in the central through-opening. 
     
     
         8 . The camshaft adjusting device as recited in  claim 1  wherein the central valve is integrally connected to the stator or to the component, the component being rotatably fixedly connected to the stator, the camshaft being integrally connected to the rotor or to a further component rotatably fixedly connected to the rotor. 
     
     
         9 . The camshaft adjusting device as recited in  claim 7  wherein the camshaft has a tubular end section extending into the through-opening between the rotor and the central valve, the tubular end section having elongated openings, the pressure medium conducted from the central valve via the elongated opening into the working chambers. 
     
     
         10 . The camshaft adjusting device as recited in  claim 9  wherein the central valve is integrally connected to the stator or to the component, the component being rotatably fixedly connected to the stator, the camshaft being integrally connected to the rotor or to a further component rotatably fixedly connected to the rotor.