Patent ID: 7464618

Claim:
A hydraulic control apparatus for an automatic dual clutch transmission, which includes first clutch with a first partial transmission and a second clutch with a second partial transmission, as well as a shifting system for engaging/releasing gears of the two partial transmissions, having a control unit which predetermines at least one of controllable pressure and controllable volumetric flow for the actuation of the first and second clutches and for the actuation of the shifting system, and having a switching apparatus that is arranged between the control unit and the clutches and the control unit and the shifting system and can be used to switch the controllable pressure or the controllable volumetric flow onto the clutches or the shifting system, the control unit having a first pressure regulator and a second pressure regulator, and the switching apparatus having a first switching valve and a second switching valve, wherein the first switching valve a) in a first position (A I ) connects the first pressure regulator to the first clutch and disconnects the first pressure regulator from the shifting system, and b) in a second position (B I ) connects the first pressure regulator to the shifting system and disconnects the first pressure regulator from the first clutch; and the second switching valve c) in a first position (A II ) connects the second pressure regulator to the second clutch and disconnects second pressure regulator from the shifting system, and d) in a second position (B II ) connects the second pressure regulator to the shifting system and disconnects second pressure regulator from the second clutch.