Patent ID: 7126238
Filing Date: 2006-10-24
Classification: B60R

Abstract:
1. A device for driving an electric actuator unit, comprising: a driving unit comprising: wherein the first and second polarity control inputs actuate first and second change-over switches, respectively, the first change-over switch connecting, in the signalless state of the associated polarity control input, a first of said at least two voltage outputs to ground via a measuring resistor and to the voltage input in the state in which a signal is supplied; and the second change-over switch connecting, in the signalless state of the associated polarity control input, the second of said at least two voltage outputs to ground, and to the voltage input in the state in which a signal is supplied; wherein the actuator unit comprises a drive motor and at least two voltage inputs which are operatively coupled to said at least two voltage outputs, the drive direction of the drive motor being determined by the polarity of the signal at the at least two voltage inputs and the drive motor being operated in at least one of the drive directions only when the control input is supplied with a predefined control signal; and wherein it is possible to carry out a diagnosis of the system in one position of the first and second change-over switches in which the measuring resistor has current flowing through it when the drive motor is supplied with voltage.