METHOD FOR VOLUMETRIC FLOW BASED PUMP-SYNCHRONOUS, IN PARTICULAR CYLINDER-SELECTIVE RAIL PRESSURE CONTROL FOR A FUEL SUPPLY SYSTEM OF A COMBUSTION ENGINE WITH CURRENT DETECTION AND CURRENT REGULATION OF THE ACTUATORS OF THE RAIL PRESSURE CONTROL

The invention relates to a method for controlling a rail pressure (p7) produced by a high-pressure pump (1) in a fuel accumulator (4) for a fuel supply system (100) of an internal combustion engine, wherein a crankshaft-angle-related or camshaft-angle-related fixed angular difference of the internal combustion engine between an upper dead center position of a cylinder piston of a cylinder of the internal combustion engine and an upper dead center position of the pump piston of the high-pressure pump (1) of the fuel supply system (100) is taken into account in the metering of the delivery volume of the high-pressure pump (1). [0002] It is provided that, recurring pump-synchronously for each segment corresponding to one revolution of a crankshaft and thus the movement of the pump piston of the high-pressure pump (1) from the upper dead center position of the pump piston to the next upper dead center position, a discretization of a control deviation (Δp) of the rail pressure (p7) in the fuel accumulator (4) is performed and, proceeding from the discrete control deviation (Δp), a volume-related discrete volume control difference (ΔV), in particular a volume-related discrete cylinder-selective volume control difference (ΔV), is calculated.