Hydraulic system for actuating at least two operating systems of a motor vehicle

A hydraulic system for actuating at least two operating systems (1, 2, 3) of a motor vehicle, said hydraulic system comprising:

• a first hydraulic medium reservoir (13) configured to store a hydraulic medium;
• a distribution valve (16) connected to said first hydraulic medium reservoir (13) and to the at least two operating systems (1, 2, 3) of the motor vehicle;
• a control unit (26) connected to said distribution valve (16);
• said distribution valve (16) configured to distribute the hydraulic medium from said first hydraulic medium reservoir (13) to the at least two operating systems (1, 2, 3) of the motor vehicle and to control flow of the hydraulic medium to the at least two operating systems (1, 2, 3) of the motor vehicle such that one of the at least two operating systems (1, 2, 3) has priority with regard to supply of the hydraulic medium;
• wherein a first one of said at least two operating systems (1, 2, 3) is a brake device (3), comprising a brake power assist unit (34), a brake valve (40), and a master brake cylinder (41);
• wherein said brake power assist unit (34) is connected via said brake valve (40) to said control unit (26);
• wherein said brake power assist unit (34) comprises a cylinder and a piston (35) slidingly arranged in said cylinder and separating said cylinder into a first pressure chamber (36) and a second pressure chamber (37), wherein said second pressure chamber (37) is connected to said brake valve (40);
• and
• further comprising a second hydraulic medium reservoir (51), wherein said first pressure chamber (36) is connected to said second hydraulic medium reservoir (51).