Fuel injector

摘要

A fuel injector for use in an internal combustion engine, comprising a nozzle body (40) being provided with a nozzle bore (66) and at least one set of one or more outlets for fluid, an outer valve member (68) received within the nozzle bore (66) and being engageable with a first seating region (100a) of the nozzle body (40) to control the flow of a first fluid from a first delivery chamber (98), the outer valve member (68) being provided with an outer valve bore (74), and an inner valve member (76) received within the outer valve bore (74) and being engageable with a second seating region (100b) of the nozzle body (40) to control the flow of a second fluid from a second delivery chamber (142). In various embodiments, the fuel injector can be arranged to allow the first and second fluids to be injected separately and/or together. In one embodiment, the first and second fluids can be mixed within the injector before injection.