numerals not all important elements are illustrated and certain elements are illustrated which are not absolutely necessary for the present invention fig1 shows a first specific embodiment of a hydraulic camshaft adjuster 1 this camshaft adjuster 1 is of the vane type and uses a hydraulic medium such as oil a hydraulic conducting system 2 is present which could also be referred to as an oil conducting system it includes a first hydraulic medium line 3 a second hydraulic medium line 4 and a third hydraulic medium line 5 camshaft adjuster 1 has as usual a stator 6 and a rotor 7 a hydraulic medium supply and or hydraulic medium discharge device 8 is connected to one end of first second third hydraulic medium lines 3 through 5 hydraulic medium supply and or hydraulic medium discharge device 8 includes an oil supply device 9 and an oil discharge device 10 a hydraulic valve 11 is connected between hydraulic medium conducting system 2 and hydraulic medium supply and or hydraulic medium discharge device 8 hydraulic valve 11 is situated between a spring element 12 and an electromagnet 13 electromagnet 13 is supplied with variable current via an engine control unit whereby the hydraulic valve or a piston in hydraulic valve 11 is movable chambers 14 divided by vanes 15 are provided between stator 6 and rotor 7 an advance chamber 16 is present on the one side of each vane 15.