Control valve of a camshaft adjuster

Abstract

A control valve ( 1 ) of a camshaft adjuster is provided having a multi-part housing ( 2 ) that is formed as a screw

1 . A control valve of a camshaft adjuster, that carries a flow of hydraulic medium for controlling the camshaft adjuster,
 the control valve comprises: a supply connection (P), several work connections (A, B), and a tank connection (T), a housing formed as a screw with a cylindrical hollow space in which a control piston is guided so that it is movable in an axial direction, the housing formed as a screw has a multiple-part construction including a threaded body and a sleeve, and the threaded body is connected to the sleeve which is arranged peripheral to the threaded body.   
     
     
         2 . The control valve according to  claim 1 , wherein the threaded body has a positive locking element that is held in a complementary receptacle of the sleeve, and a connection between the sleeve and the threaded body is formed by positive locking. 
     
     
         3 . The control valve according to  claim 2 , wherein the complementary receptacle is arranged inside the sleeve. 
     
     
         4 . The control valve according to  claim 2 , wherein the complementary receptacle is arranged outside the sleeve. 
     
     
         5 . The control valve according to  claim 1 , wherein the sleeve includes the cylindrical hollow space having a guide surface that guides the control piston so that it is movable in the axial direction. 
     
     
         6 . The control valve according to  claim 1 , wherein the sleeve is constructed as a deep-drawn part or extruded part. 
     
     
         7 . The control valve according to  claim 1 , wherein the threaded body is constructed as a formed part. 
     
     
         8 . The control valve according to  claim 1 , wherein the threaded body has a central passage opening. 
     
     
         9 . The control valve according to  claim 1 , wherein the threaded body has an external thread that is engageable with an inner thread of a camshaft. 
     
     
         10 . The control valve according to  claim 1 , wherein the sleeve has a screw head on an end side of the sleeve that is formed as flange.