System for controlling automatic gearbox reduces drive torque if slipping occurs in frictional clutch as result of insufficient oil pressure until gear stage input/output revolution rates correspond

摘要

The system has a control unit (5) that compares the input and output revolution rates for each selected gear stage and reduces the drive torque if slipping occurs in the frictional clutch (2) as a result of insufficient oil pressure until the input and output revolution rates of the selected gear stage correspond an holds the pressure constant until sufficient oil pressure has built up for torque transfer.