ELECTROHYDRAULIC SYSTEM FOR OPERATING CLUTCH(ES) AND GEAR SELECTOR(S) OF MANUAL GEARBOXES HAVING A PISTON-CYLINDER UNIT WITH DUAL-ACTION RECIPROCATING PISTON

摘要

The invention relates to a manual gearbox, a control unit and at least one electric-motor-driven piston-cylinder unit (19) which has a piston (19d) and is connected via hydraulic lines to multiple manual gearbox units (25, 28, 30, 33, 35, 38) of the manual gearbox and shifts them, the manual gearbox units comprising at least two clutch units (25/C1, 28/C2), characterised in that the piston (19d) of the piston-cylinder unit (19) is in the form of a dual-action reciprocating piston, wherein the dual-action reciprocating piston (19d) sealingly separates two working chambers (19a, 19b) from each other, wherein each working chamber (19a, 19b) is connected via a main hydraulic line (HL1, HL2) to one clutch (C1, C2) each, and at least one working chamber (19a, 19b) of the dual-action reciprocating piston can be connected hydraulically via a switch valve (20, 22) to the reservoir (6).