Steuereinrichtung für ein hydraulisch betätigtes Getriebe eines Kraftfahrzeuges

摘要

A pressure control system is designed to disable action of a duty controlled solenoid while fluid pressure is not supplied. Namely, the pressure control system monitors a fluid pressure in a hydraulic circuit to detect the fluid pressure lower than a predetermined pressure criterion. When the fluid pressure lower than the pressure criterion is detected, the solenoid is disabled.