Verfahren zum Steuern des Hydraulikdrucks in automatischen Getrieben

摘要

Line pressure control with a reducing valve (8) controlling pressure from a line (100) of the third/fourth gear clutch to the port (80) of the regulator valve (6) dependant on the pressure signal (96) of the damper clutch solenoid valve (S5). Each friction member can be equipped with a pressure sensor to detect malfunction of valves and to introduce fail safe measures. The feed back of the hydraulic pressure by the pressure sensors to the control unit can be used to improve the shift quality. $$