Abstract: A hydraulic pressure supply unit has two exits that are alternately pressurized, a reversible pumping unit including at least two pumps, reversible electric motor that drives all pumps jointly, if necessary with mutually de-locking check valves before the exits, and a supply for hydraulic medium. One pump is a low-pressure pump and one pump is a high-pressure pump, and the pressurized exits of both pumps are placed against the same exit of the pressure supply unit. Both exits of the high-pressure pump can be separated from the low-pressure pump via check valves, and each pump is connected to the supply for hydraulic medium via its own shuttle valve.

Abstract: A hydraulic pressure supply unit has two exits (6, 7) that are alternately pressurized, a reversible pumping unit comprising at least two pumps (9, 10) as well as a reversible electric motor (11) that drives all pumps jointly, if necessary with mutually de-locking check valves (8) before the exits. Furthermore envisioned is a supply for hydraulic medium. One pump is configured as a low-pressure pump (10) and one pump is configured as a high-pressure pump (9), and whereby the pressurized exits of both pumps are placed against the same exit (6, 7) of the pressure supply unit.