Torque converter lockup clutch detecting and controlling method for drive train of motor vehicle, involves comparing lateral distribution of gradient difference with detection threshold value

摘要

The method involves determining a pump moment gradient formed from a detected pump moment of a pump wheel (3) and a motor moment gradient formed from a detected motor moment of a driving motor in a predetermined time slot. A lateral distribution of a gradient difference is compared with a detection threshold value, where computation of the gradient difference takes place over a factorizing of gradients dependent on course and thrust operations. An attachment detection signal is outputted during exceeding of the threshold value.