Patent ID: 6981489

Claim:
Method for controlling a fuel injector ( 1 ) for a controlled-ignition internal combustion engine provided with an electrically operated electromagnetic actuator ( 5 ) in such a manner as to open the injector ( 1 ) for a determined injection time (Tj); the method providing that the injector ( 1 ) be operated with a first current waveform (A) if the injection time (Tj) is greater than a predetermined threshold value (Ts), and that the injector ( 1 ) be operated with a second current waveform (B) if the injection time (Tj) is less than the predetermined threshold value (Ts); two current waveforms (A, B) sharing an identical initial part, during which the current (i(t)) passing through the injector ( 1 ) is caused to rise for a first time interval (T 1 ) until it reaches a peak value (Ip), which is maintained for a second time interval (T 2 ; T 5 ) by cyclic switching of the voltage (v(t)) applied to the injector ( 1 ) between two different values (0, Vc); the method being characterized in that the second waveform (B) of the current (i(t)) provides for the current (i(t)) passing through the injector ( 1 ) to be maintained at the peak value (Ip) until the end of the injection time (Tj) and thus rapidly setting the current (i(t)) passing through the injector ( 1 ) itself to zero.