Patent ID: 7182053
Filing Date: 2007-02-27
Classification: F01L

Abstract:
1. A camshaft adjuster ( 1 ) including a camshaft driven by a crankshaft of an internal combustion engine, an adjustable drive mounted on the camshaft by a mounting screw having a hollow screw shank ( 12 ), an axially displaceable control piston ( 11 ) disposed in said hollow screw shank ( 12 ) for controlling the supply of oil to, and from, the camshaft adjuster ( 1 ), an electromagnetic device ( 5 ) disposed adjacent the control piston ( 11 ) for operating said control piston ( 11 ), said camshaft adjuster ( 1 ) including transmission parts ( 17 , 18 ) which are rotatable in relation to one another for adjustment of the angular position of the camshaft relative to the crankshaft, said control piston ( 11 ) being axially movable by said electromagnetic device so as to additionally act as an oil pump for providing an oil supply to the camshaft adjuster.