A hydraulically operated automatic gearbox has a two way electromagnetic valve for gear selection controlled by a third which also operates the clutch cylinder

摘要

The main valve (120) has an inlet (138) and an outlet (142) to the selector valves (144,146) and another (148) to the clutch cylinder (22). The selector valves control the transverse (114) and the gear selection (115) valves through ports (176,178) depending on the position of the pistons (164).