Patent ID: 6039673
Filing Date: 2000-03-21
Classification: B60W,F16H,Y10T

Abstract:
A control system for an automatic transmission which includes a hydraulic power transmission connected to an engine, a speed change unit, a clutch which is engaged when a forward driving range is selected, and a brake which is engaged to prevent a vehicle from moving backward and to thereby establish a hill-holding state in the speed change unit, said control system comprising:a stop state detector which determines a vehicle stopped state by detection that the forward driving range has been selected, that an accelerator pedal is released and that a brake pedal is depressed;a clutch disengaging system which provides a neutral control wherein the clutch is almost disengaged;a brake engaging system which initiates a hill-holding control by engaging the brake; anda delay system which delays timing of initiation of the hill-holding control until after initiation of the disengagement of the clutch by the clutch disengaging system, and which initiates said hill holding control responsive to said clutch reaching the state where it is almost disengaged.