Hydraulic control unit and hydraulic motor vehicle brake system

The invention relates to a hydraulic control unit and a hydraulic motor vehicle brake system. The invention relates to a hydraulic control unit (4, 19, 29, 32, 36, 38), in particular an electro-hydraulic control unit, for a vehicle, comprising a hydraulic fluid reservoir (1) having a hydraulic fluid storage space (7), an air space (8) and a piston (5), in particular an electro-hydraulic pressure generator, which can draw hydraulic fluid out of the hydraulic fluid storage space, the invention relates to a hydraulic control unit (4, 19, 29, 32, 36, 38) for a hydraulic motor vehicle brake system, comprising a piston which is accommodated in a hydraulic fluid reservoir (1) in a displaceable manner, in particular in a sliding manner, and which separates a hydraulic fluid reservoir space (7) and an air space (8) from one another, the air space (8) being connectable and/or connected to an interior space (23, 25) of the hydraulic control unit (4, 19, 29, 32, 36, 38) and the hydraulic motor vehicle brake system. 本申请涉及