Patent ID: 7543488

Claim:
An electric servo steering arrangement ( 29 ) for motor vehicles with a rotational angle sensor configuration ( 26 ) for acquisition of a position of a steering movement comprising: a support plate ( 8 ) which has rotational axis (Z) and which rotates relative to the steering movement, with at least one code track ( 4 ) and only one stationary sensor ( 1 ) acting on each code track ( 4 ), wherein the code track ( 4 ) is disposed circularly about the rotational axis (Z) of the support plate ( 8 ) and comprises a plurality of markings ( 41 ) for generating a sequentially changing bit pattern wherein 360° of the circumference of the code track, divided by the number of markings ( 41 ) on the circumference defines a clock angle (β), and wherein the markings ( 41 ), aside from selected predetermined positions around the circumference, change alternately between ‘1’ and ‘0’ in precisely equidistant angular spacings, and wherein in the selected predetermined positions the markings ( 41 ) are arranged in a phase-shifted disposition with respect to the fixed division of the clock angle (β) whereas a ‘1’/‘0’ bit pattern with respect to the clock angle (β) changes to be delayed and that the next following change of the markings is not arranged in a phase-shifted disposition with respect to the fixed division of the clock angle (β) whereby a defined pattern is created with only the one stationary sensor ( 1 ) acting on each code track ( 4 ).