Motor-controlled windshield wiper system

摘要

In a wiper system using a reversible motor for reciprocating angular movement of a wiper arm, a separate relay and a separate position detecting segment are used for selectively defining a path for regenerative braking. Because the third relay and the third position detecting segment are provided separately from those used for controlling the power supply of the electric motor, and are therefore relatively free from any large time constant, it is possible to start the regenerative braking action at a prescribed angular location without involving any substantial time lag so that the wiper arm can be stopped at a prescribed angular position at each terminal point at high precision at all times.