Patent ID: 8215273

Claim:
Camshaft adjuster for an internal combustion engine, which is attached on one end to a camshaft and which acts as a transmission element from a drive wheel for the rotational drive of the camshaft, the camshaft adjuster comprising an internal wheel locked in rotation to the camshaft, and a coaxial external wheel that can rotate relative to the internal wheel, a control valve is provided coaxial to the internal wheel with a valve slide, which is provided for controlling a fluid for pressurizing pressure spaces arranged between the internal wheel and the external wheel, in order to create an angular adjustment between the internal wheel and the external wheel, the internal wheel has a central valve slide space extending in the axial direction toward the camshaft that directly holds the valve slide so that it can move in the axial direction with a surface of the valve slide in direct contact with the internal wheel, and the internal wheel has at least one control edge, with which the valve slide interacts in a sealing manner to alternately pressurize the pressure spaces between the internal wheel and the external wheel, wherein an electrical central magnet, which is arranged coaxial to the camshaft and which is mounted on a motor-fixed component, is provided for the axial adjustment of the valve slide via a pressure pin which is movable in the axial direction upon excitation of the central magnet and which presses the valve slide in the axial direction against an axial force from a pressure spring arranged on an opposite side of the valve slide from the electrical central magnet.