ANORDNUNG ZUR UEBERWACHUNG EINER REIBUNGSKUPPLUNG

摘要

To protect an automatic friction clutch of a motor vehicle, it is proposed periodically to calculate data for the instantaneous friction power of the clutch (5) by means of a computing device (23) and to sum them in a plurality of time window memories likewise updated periodically. The time window memories have different time windows and accordingly store a spectrum of averages for the work of friction. The time window memories are each allocated a plurality of limiting values, the magnitude of which is additionally a function of the air temperature of a clutch bell (37) surrounding the clutch (5). A computing device (23) initiates graduated protective measures as a function of the temperature measured by means of a temperature sensor (35) and of the limiting values decisive for this temperature. For safety reasons, none of the protective measures prevents the clutch (5) from operating completely. As the thermal loading on the clutch (5) increases, all that occurs is that the comfort of the clutch is increasingly reduced, active measures which do impair comfort, such as, for example, oscillations of an actuator (19) of the clutch (5) resulting in grabbing of the clutch (5) being brought about when the maximum load limit is approached.