Fuel injector

A fuel injector for delivering gaseous fuel to an internal combustion engine, the fuel injector comprising:

• a nozzle body provided with a nozzle bore;
• a first valve needle received within the nozzle bore and engageable with a first valve seat to control gaseous fuel delivery through at least one outlet of an injection nozzle at a first injection rate;
• a first actuator arrangement for controlling movement of the first valve needle, the first actuator arrangement comprising a first coil which is mounted concentrically on an associated first solenoid body of the first actuator arrangement and further comprising a first armature which is mounted radially inward of the first coil;
• a second valve needle which is engageable with a second valve seat to control gaseous fuel delivery through the at least one outlet of the injection nozzle at a second injection rate;
• and
• a second actuator arrangement for controlling movement of the second valve needle, the second actuator arrangement comprising a second coil which is mounted concentrically on an associated second solenoid body of the second actuator arrangement and further comprising a second armature which is mounted radially inward of the second coil;
• wherein the second valve seat is defined by an upper end surface of the first valve needle, the first valve needle defining an internal flow path for gaseous fuel flow when the second valve needle is lifted from the second valve seat and the first valve needle is lifted from the first valve seat.