Patent ID: 7849836

Claim:
A common rail fuel injector, comprising: an injector body defining a nozzle outlet, a common rail inlet shaped and positioned for connection to a high pressure common rail, a cooling inlet port and a fuel drain port; a leakage path fluidly connecting the common rail inlet port to the fuel drain port; and a cooling path fluidly connecting the cooling inlet port to the fuel drain port=and wherein the cooling path remains open when the common rail fuel injector is in an injection configuration and/or a non-injection configuration; further including a control valve which further includes a valve member slidably disposed within a valve guide; and the leakage path includes a guide clearance defined between an outer surface of the valve member and an inner surface of the valve guide; and an electrical actuator operably coupled to move the valve member between a first position in contact with a seat, and a second position out of contact with the seat.