Rotating body's i.e. drive pulley, angular position determining system for motor vehicle, has angular position determining device utilizing position signals to know position of body and deactivating usage of signals before pole

摘要

The system has a sensor comprising groups (5, 6) of sensible elements positioned relative to a multi-polar magnetic track (3) so that a reference signal is out of phase relative to position signals. A processing device forms a digital signal comprising an impulse for each period. Angular position determining device detects an irregular pole (4) by analyzing absence of impulse on a signal, detects an occurrence of the signal after the pole, utilizes position signals to know a position of a rotating body relative to the pole and deactivates usage of the signals before the pole.