ELECTROMAGNETIC FRICTIONALLY ENGAGED CLUTCH AND METHOD FOR OPERATING THE SAME

摘要

The invention relates to an electromagnetic frictionally engaged clutch (l; 20) for arranging inside a drive train connecting a drive motor and a vehicle door or a vehicle flap. The aim of the invention is to ensure that the vehicle door is securely held in each intermediate position, when the clutch (l; 20) is in an idle state, while maintaining the possibility of a manual emergency actuation of said vehicle door. To this end, the rotor part (4) comprises at least one permanent magnet (15) in addition to the electric coil (6), such that when a current does not pass through the coil (6), the armature disk (10) is pressed against the friction lining (2) of the rotor part (4), with a force which is strong enough for the vehicle door or vehicle flap to securely remain in its respective position occupied when the clutch (1; 20) is in an idle state, and for the friction engagement between the armature disk (10) and the friction lining (2) to be overcome when the vehicle door or vehicle flap is subsequently manually actuated.