Method for controlling an internal combustion engine

The regulation method has the pump (3) supplying fuel to the common-rail fuel injection system (6,7) provided with a suction throttle and controlled by a pulse-width modulation signal via an electronic control device (4). A critical speed is calculated from the angular spacing between successive fuel injections and the frequency of the pulse-width modulation signal, used for determination of a rev range, the pulse-width modulation frequency set to a first frequency outside this rev range and a second frequency within this rev range.