Theory Of Operation

Estimate of clutch wear 

In order to properly command the clutch packs in the most correct manner, the TVM needs to know their wear. To know the wear of clutches, it commands the small electric motors to open and close the clutches. The current drawn by the small electric motors can reach peak currents of approximately 20A.

The process of ascertaining clutch wear takes about 45 seconds.

When the status of ignition and of the motor pass: from "ON" to "OFF" and the values of temperature and battery voltage allow it, the TVM starts the clutch wear estimation procedure and then turns Off. The first 1, 000 adaptations occur after the first switch-off, after which it will carry it out only after the second shutdown.