Vorrichtung und Verfahren zur Steuerung von Scheibenwischern

摘要

The invention relates to a windscreen-wiping device (10) and method according to which an operating windscreen wiper (12) is accurately positioned in each reverse position (U1, U2), taking into consideration local conditions on the windscreen regarding the extent of wetting after the motor (16) is switched off during braking until the reverse positions (U1, U2) are reached. The device (10) further comprises a pulse generator (22) for generating pulses (I) in accordance with the wiper movement, which pulses are transmitted via a signal input to a control unit (18) for controlling the motor (16). A counter (24, 26) counts the pulses (In) characterizing the overtravel of the wiper (12) until it comes to a halt after the motor has been turned off (16) and before it reaches a reverse position (U1, U2). Before the next reverse position (U1, U2) or parking position (P) is reached, the control unit (18) emits a switching signal (20) for the motor (16) to be turned off and/or for its direction of rotation to be changed, depending on the number of overtravel pulses (In) counted.