A control for a pressure
fluid supply system is described, in particular for the
high pressure in a
fuel injection system, for example for an internal
combustion Diesel engine, by means of which the pressure in a common high-pressure line supplied by a high-pressure pump, i.e. in the
common rail, to which individual consumers are connected, is controlled in accordance with the instantaneous pressure fluid requirements. For adapting the pressure in the common high-pressure line to the pressure fluid requirements of the consumers, i.e. the injection nozzles, a device for limiting the amounts of fluids conveyed is associated with the high-pressure pump, which has at least on adjusting element which can be changed by means of an adjusting
signal representing the instantaneous pressure
fluid supply situation in the
common rail. To avoid an elaborate
pressure sensor device in the
common rail and for the simultaneous improvement of the
reaction behavior of the control, in particular when reducing the
high pressure in the common rail, the adjusting
signal is derived from the amount of fluid
throughput in the delivery line of a
pressure control valve connected to the common rail. The pre-conveying pressure or the pre-conveying amount available to the high-pressure pump is affected by means of this adjusting
signal in the sense of a regulation of the pressure in the common rail.