Patent ID: 6347516
Filing Date: 2002-02-19
Classification: F04B

Abstract:
An electrohydraulic pressure supply unit comprising:a speed-controlled electric drive motor (M); a variable displacement pump (1), for which the displacement volume (V) can be changed with an adjustment member (5), and having connecting lines (3) and load connections (4); a device (Q) for determining the delivered volume flow (Qactual) of the pump; a regulating device (Reg) for regulating the drive motor (M) speed, with the input variables provided to the regulating device (Reg) including at least the delivered volume flow (Qactual) and a desired volume flow (Qdesired); a pump adjustment unit (PV) for actuating the adjustment member (5) of the variable displacement pump (1); a pressure gauge (&Dgr;p) for determining the differential pressure (&Dgr;p) across the load connections, and, a control unit (Strg) for actuating the pump adjustment device (PV), with the control unit (Strg) using at least one reference pressure (pref) and the differential pressure (&Dgr;p) as input variables.