Abstract: An embodiment of a fuel injector comprising: an injection valve provided with a mobile needle for regulating the fuel flow through an injection nozzle; a supporting body having a tubular shaft and displaying a feeding channel which ends with the injection valve; and an electromagnetic actuator comprising a spring which tends to maintain the needle in a closing position and an electromagnet, which comprises a coil arranged outside the supporting body, a fixed magnetic armature arranged within the supporting body, and a keeper which is arranged within the supporting body, is magnetically attracted by the magnetic armature against the bias of the spring, and is mechanically connected to the needle; the coil displaying a toroidal shape having an internal annular surface, which is directly in contact with an external surface of the supporting body without the interposition of any intermediate element.

Abstract: A fuel injector (1) having an injection valve (7) with a movable pin (15); and an actuator (5) for moving the pin (15) between a closed position and an open position; the actuator (5) has a movable armature (10), and an antirebound device (20) interposed between the movable armature (10) and the pin (15) to connect the movable armature (10) and the pin (15) mechanically; the antirebound device (20) has a deformable elastic plate (32; 45; 48) which is annular in shape, is connected centrally to the pin (15), and is connected laterally to the armature (10) to transmit at least the closing movement of the injection valve (7) from the armature 15 (10) to the pin (15).

Abstract: A fuel injector provided with an injection jet, an injection valve, the latter having a mobile plunger for regulating the flow of fuel through the injection jet, and an electromagnetic actuator, which is capable of displacing the plunger between a closed position and an open position of the injection valve and has a pair of electromagnets, each having a coil, a fixed magnetic armature, and a mobile armature; on the outer surface of a tubular supporting body of the injector, there are produced two annular slots, in each of which there is wound a corresponding coil of an electromagnet.

Abstract: An embodiment of a fuel injector comprising: an injection valve provided with a mobile needle for regulating the fuel flow through an injection nozzle; a supporting body having a tubular shaft and displaying a feeding channel which ends with the injection valve; and an electromagnetic actuator comprising a spring which tends to maintain the needle in a closing position and an electromagnet, which comprises a coil arranged outside the supporting body, a fixed magnetic armature arranged within the supporting body, and a keeper which is arranged within the supporting body, is magnetically attracted by the magnetic armature against the bias of the spring, and is mechanically connected to the needle; the coil displaying a toroidal shape having an internal annular surface, which is directly in contact with an external surface of the supporting body without the interposition of any intermediate element.

Abstract: A fuel injector (1) having an injection valve (7) with a movable pin (15); and an actuator (5) for moving the pin (15) between a closed position and an open position; the actuator (5) has a movable armature (10), and an antirebound device (20) interposed between the movable armature (10) and the pin (15) to connect the movable armature (10) and the pin (15) mechanically; the antirebound device (20) has a deformable elastic plate (32; 45; 48) which is annular in shape, is connected centrally to the pin (15), and is connected laterally to the armature (10) to transmit at least the closing movement of the injection valve (7) from the armature 15 (10) to the pin (15).

Abstract: A fuel injector provided with an injection jet, an injection valve, the latter having a mobile plunger for regulating the flow of fuel through the injection jet, and an electromagnetic actuator, which is capable of displacing the plunger between a closed position and an open position of the injection valve and has a pair of electromagnets, each having a coil, a fixed magnetic armature, and a mobile armature; on the outer surface of a tubular supporting body of the injector, there are produced two annular slots, in each of which there is wound a corresponding coil of an electromagnet.

Abstract: A fuel injector provided with an injection jet, an injection valve, which valve comprises a mobile plunger to control the flow of fuel through the injection jet, and an actuator, which is capable of displacing the plunger between a closed position and an open position of the injection valve; the plunger comprises an elongate rod mechanically connected to the actuator and a sealing head capable of engaging in sealing manner with a valve seat of the injection valve; the rod of the plunger is of high flexibility and exhibits a flexibility parameter of between 1 and 2 N/mm2.