Braking device for a motor vehicle

Braking device (10) for a motor vehicle, having a fluid path (12) through which a fluid can flow and which has at least two line sections (14, 16), in which at least one pump element (18) for conveying the fluid through the fluid path (12) and at least one valve device (34) is arranged, through which the fluid can flow and which has at least one valve inlet (26) and one valve outlet (28) and which can be moved between at least two valve positions (30, 32), which is fluidically connected to the pump element (18) via the valve inlet (26) by means of a first line section (14) of the line sections (14, 16), with a retarder (38), which has a stator (40) a rotor (42) formed separately from the stator (40) and a retarder inlet (44), via which the retarder (38) is fluidically connected to the valve device (34) via the valve outlet (28) by means of a second line section (16) of the line sections (14, 16), wherein the valve inlet (26) is fluidically connected to the valve outlet (28) in a first of the valve positions (30), whereby the fluid flowing through the first line section (14) can be supplied through the valve device (34) via the second line element (16) to the retarder inlet (44), and in the second valve position (32) the valve inlet (26) is not fluidically connected to the valve outlet (28),

• characterized in that
• at least one coupling element (47), via which the rotor (42) can be coupled to a drive shaft (48) of the motor vehicle and can be decoupled from the drive shaft (48), and a coupling device (50), by means of which the rotor (42) and the drive shaft (48) can be coupled via the coupling element (47) by moving the valve device (34) into the first valve position (30) and can be decoupled by moving the valve device (34) into the second valve position (32).