A method for operating a drive
train in a motor vehicle with a dual
mass flywheel driven by an
internal combustion engine via a
crankshaft and at least a transmission input shaft of a transmission that can be coupled with an output part of the dual
mass flywheel. Between the input part and output part a
hysteresis-laden damping device is effective, which influences engine torque output from the
internal combustion engine and
load torque transmitted to at least a transmission input shaft through the
hysteresis characteristic. To eliminate the disturbances caused by the dual
mass flywheel a
state model constantly determines rotation speeds of the input part and of the output part and depending on a differential angle determined from the rotation speeds and from the characteristic numbers of the damping device, a characteristic disturbance torque for influencing at least the
load torque is determined in real time.