Drive device for closing parts in motor vehicles

摘要

Drive device for closing parts in motor vehicles, especially sliding roofs, sliding/lifting roofs, and the like, with a drive motor, a sensor for determining the actual rpm of the drive motor and a clamping protection means for disengaging or for reversing the direction of rotation of the drive motor when the danger of clamping of the closing parts arises. The device has a speed controller which delivers an actuating signal which is a function of the deviation of the actual speed from a set speed of the drive motor. The drive device also includes an actuating means for varying the supply voltage delivered to the drive motor depending on the actuating signal of the speed controller, and an evaluation means which triggers the clamping protection means and which determines the existence of incipient clamping based on a signal which is dependent on the actuating signal of the speed controller.