Patent ID: 8448615

Claim:
An electromagnetic camshaft-adjuster device comprising: a stationary coil unit ( 10 ), formed about a stationary core ( 12 ); an armature unit ( 14 ) having a tappet unit ( 16 ) movable in a longitudinal direction upon energisation of the stationary coil unit, the tappet unit has an engagement end ( 18 ) for camshaft adjustment and a permanent magnet unit end ( 20 ) opposed to the engagement end ( 18 ); the supporting unit is associated with a stationary magnetic field detection means ( 22 ; 38 ) designed for the contactless magnetic interaction with the permanent magnet unit and designed so that, in an energisation and non-energisation state of the stationary coil unit through evaluation of a magnetic field detection signal generated by the magnetic field detection means, an axial position of the armature unit and/or of the adjusting unit can be electronically determined.