Patent ID: 7938209

Claim:
A method for adapting torque characteristic in a disengaging clutch arranged in a vehicle hybrid drive train between an internal combustion engine and an electrical machine that is connected to at least one driven vehicle wheel, comprising the following steps: deciding that the internal combustion engine can be disconnected, switching off the internal combustion engine and opening the disengaging clutch, detecting a time gradient of rotational speed of the internal combustion engine with the internal combustion engine switched off and the disengaging clutch opened, partially closing the disengaging clutch as soon as the rotational speed of the internal combustion engine falls below a predetermined value, and detecting the time gradient of the rotational speed of the internal combustion engine with the disengaging clutch partially closed, determining clutch torque transmitted by the disengaging clutch, which is partially closed, by evaluating the time gradient, which was detected, of the rotational speed of the internal combustion engine, and adapting characteristics of the disengaging clutch with aid of the clutch torque transmitted by the disengaging clutch which is partially closed.