Patent ID: 8485160

Claim:
A fuel pressure regulation system for an internal combustion engine, comprising: a pressure accumulator which stores fuel under pressure and feeds injectors supplying combustion chambers of the internal combustion engine with fuel, wherein the pressure accumulator has an associated leakage rate dependent at least in part on the pressure of the fuel therein, a high-pressure pump which supplies a fuel mass flow to the pressure accumulator, a first valve for throttling the fuel mass flow, a second valve via which fuel can be discharged from the pressure accumulator, and a control unit for actuating the valves, wherein the control unit is operable: to determine a fuel mass flow required by the pressure accumulator based at least in part on a function of a predefined setpoint pressure in the pressure accumulator, the associated leakage rate, and injection quantities required by the injectors, to split the determined fuel mass flow into a mass flow fraction that is to be supplied via the first valve and a mass flow fraction that is to be discharged via the second valve, and to actuate the valves according to the mass flow fractions.