Assembly for a hydraulic motor-vehicle brake system and brake system having such an assembly

A brake system for a motor vehicle for actuating hydraulically actuable wheel brakes, the brake system comprising:

• a brake master cylinder actuable by means of a brake pedal and having pressure chambers, wherein each pressure chamber is assigned at least one wheel brake;
• a pressure medium reservoir under atmospheric pressure assigned to the brake master cylinder;
• an electrically controllable pressure modulation device for setting wheel-specific brake pressures, having at least one inlet valve and one outlet valve for each wheel brake;
• and
• an electrically controllable pump-valve assembly comprising an assembly for a hydraulic motor-vehicle brake system per pressure chamber, having a first port connected to one of the pressure chambers, a second port connected to the pressure medium reservoir, and an output pressure port connected to the inlet valve assigned to the pressure chamber, the assembly comprising:
• a pump assembly having at least one first suction side connected by way of a line segment to the second port and at least one first pressure side assigned to the first suction side;
• a first hydraulic connection connects the first port and the output pressure port;
• a first valve arranged about the first hydraulic connection, the first valve configured to be open when deenergized and is controllable in an analog manner;
• and
• a second hydraulic connection connects the first port and the second port;
• a second valve arranged about the second hydraulic connection, the second valve configured to be closed when deenergized;
• and
• a third valve arranged between the first pressure side of the pump assembly and the first suction side, the third valve is configured to be open when deenergized and is controllable in an analog manner.