the given clutch the position xemb of the actual clutch control means is obtained by linear interpolation between the position setpoints of the clutch control means a when the clutch is completely worn and b when the clutch is following the law of intermediate behavior as it has just been defined if xembint cemb t is the actuator position defined by the intermediate law valid at instant t to obtain a maximum transmittable torque cemb xemb 3 cemb is the actuator position defined by the law corresponding to the completely worn clutch from which we can obtain the same torque and xemb cemb t is the position that must be assigned to the actuator at instant t in order to obtain the torque cemb with heating of and wear on the clutch taken into account then we have in light of these different characteristics of the laws of clutch behavior and of the theoretical laws in new cold new warm and worn condition it appears that by comparing the open loop setpoint for maximum torque transmitted by the clutch cemb bo with the closed loop estimate of the torque actually transmitted by the clutch cemb bf we can estimate how the interpolations between the various theoretical laws of clutch behavior must vary over time in particular if the closed.