Patent ID: 7422002

Claim:
A method for controlling a fuel injection system for an internal combustion engine in a motor vehicle having a common rail, a high-pressure pump and a flow control valve for controlling a fuel delivery rate of the high-pressure pump to the common rail, comprising the steps of: determining with a detection device a prevailing fuel demand in the common rail as a function of the prevailing driving state of the vehicle; and controlling with a control unit a pulse duty factor of triggering of the flow control valve as a function of the prevailing fuel demand determined in the common rail, wherein the controlling of the pulse duty factor is executed in synchronization with the prevailing fuel demand and independently of a pump lift of the high-pressure pump, wherein the detection device is a pressure sensor, and the prevailing fuel demand in the common rail is determined by comparing a fuel pressure determined by the pressure sensor with a predetermined setpoint pressure, and wherein the pulse duty factor of the triggering of the flow control valve is controlled as a function of the speed of the internal combustion engine.