Patent ID: 7975566
Filing Date: 2011-07-12
Classification: F16H,Y10T

Abstract:
1. A hydraulic control apparatus for an automatic dual clutch transmission, comprising: a first clutch with a first partial transmission and a second clutch with a second partial transmission, as well as a shifting system for engaging/disengaging gears of the two partial transmissions, a control unit that controls at least one of the parameters controllable pressure and controllable volumetric flow for the actuation of the first and second clutches and for the actuation of the shifting system, a switching apparatus that is arranged between the control unit and the clutches or the shifting system and can be used to switch the at least one of the parameters controllable pressure and controllable volumetric flow between the clutches or the shifting system, the control unit having a first pressure regulator and a second pressure regulator, wherein the shifting apparatus comprises: a first changeover valve that a) in a first position (A b) in a second position (B a second changeover valve that c) in a first position (A d) in a second position (B wherein in the second position (B