Fuel injector with hydraulic pin actuation

The injector (1) has a cylindrical body (2), which houses an injection nozzle (4) regulated by an injection valve (5) provided with a moveable pin (8), a fuel supply line (15), an injection chamber (6) communicating with the supply line (15), housing a lower portion of the pin (8) and delimited below by a valve seat (7) of the injection valve (5), a control chamber (11) communicating with the supply line (15) and housing an upper portion of the pin (8), and a control valve (19), which is capable of putting the control chamber (11) in communication with a drain (18) for the low-pressure fuel and is controlled by an electromagnetic actuator (22) provided with a pair of electromagnets (25) identical with each other and arranged mechanically in series with each other so that their respective thrust forces are added together.