Patent ID: 11879453
Assignee: ROBERT BOSCH GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 4:
5. A method for operating a pump (200) of a delivery unit (110) of a fluid supply system (100), the pump (200) having a pump chamber (210) and an actively controllable inlet valve (211) and an actively controllable outlet valve (212) for the pump chamber (210), the method comprising:
controlling a pressure (p) of a fluid (121), which is to be provided by the pump (200), in a closed-loop fashion on the basis of a manipulated variable (V, f, fw), and
within one full cycle (Z) of the pump (200), activating at least one of the inlet valve (211) and the outlet valve (212) only if fluid is to be delivered, and not activating at least one of the inlet valve (211) and the outlet valve (212) if no fluid is to be delivered,
wherein the pressure (p) of the fluid (121), at least in a part of an available mass flow range of the fluid, is controlled in a closed-loop fashion by means of a first closed-loop control used for a first mass flow range (B1) that is a two-point closed-loop control in which a use (V) of an activation of the inlet valve (211) and of the outlet valve (212) is used as the manipulated variable, and wherein a pump frequency (f) is set to a predetermined value (fmin) greater than zero, and the pressure (p) is controlled in a closed-loop fashion by means of a second closed-loop control used in a second mass flow range (B2) using the pump frequency (f) as another manipulated variable, wherein the second mass flow range (B2) includes higher mass flows than the first mass flow range (B1).