Torque distribution device for a motor vehicle having two dual piston hydraulic clutches, and method for operating the torque distribution device

A torque distribution device comprising a rotor support, which is or can be coupled to a shaft that introduces the torque, and two separate clutch devices, which are each in the form of a multi-disc clutch and which can each be actuated separately via an actuation device, wherein each of the clutch devices comprises an external disc pack, which is disposed axially displaceably on the rotor support, and an internal disc pack, which is disposed axially displaceably on a separate internal disc carrier and engaging in the external disc pack, which forms a disc pack with the external disc pack, wherein each of the internal disc carriers are each or can each be coupled to a separate output shaft, wherein each of the actuation devices comprises a primary piston, a secondary piston and a holding element that is stationary with respect to the rotor support, on which the primary piston and the secondary piston are axially displaceably mounted, wherein the primary piston delimits a primary pressure chamber and can be moved against the external disc pack when a pressure medium located in the primary pressure chamber is pressurized, so that the external disc pack moves towards the internal disc pack in such a way that a torque can be transmitted from the shaft to the output shaft and vice versa by means of friction between the external disc pack and the internal disc pack caused by compressive force, wherein the secondary piston delimits a secondary pressure chamber, wherein the secondary piston can be moved counter to the restoring force of a spring element when the or a pressure medium located in the secondary chamber is pressurized, in a direction counter to the pressure-induced actuation movement of the primary piston, and wherein the spring element is coupled to the primary piston in such a way that it moves the primary piston against the external disc pack when the pressure in the secondary pressure chamber is reduced.