Method of controlling an electromagnetic fuel injector

Method of controlling an electromagnetic fuel injector (4); the method contemplates the steps of: determining a target quantity (Q INJ-OBJ ) of fuel to inject; determining a hydraulic supply time (T HYD ) as a function of the target quantity (Q INJ-OBJ ) of fuel to inject and using a first injection law (IL1) which provides a hydraulic supply time (T HYD ) as a function of the target quantity (Q INJ-OBJ ) of fuel; determining an estimated closing time (T C_EXT ) as a function of the hydraulic supply time (T HYD ) and using a second injection law (IL2) which provides the estimated closing time (T C_EXT ) as a function of the hydraulic supply time (T HYD ); determining an injection time (T INJ ) as a function of the hydraulic supply time (T HYD ) and of the estimated closing time (T C_EXT ); and piloting the injector (4) using the injection time (T INJ ).