Abstract: A fuel injector for delivering fuel to a combustion chamber having a chamber ceiling, the fuel injector having a primary axis and able to control fuel delivery through a first outlet opening or together through both the first outlet opening and a second outlet opening. The first and second outlet openings are oriented such that, in use, when fuel delivery is permitted through only the first outlet opening, a first spray formation reaches a first target distance below the chamber ceiling at a radial distance from the primary axis. When fuel delivery is permitted through both openings together, respective first and second spray formations merge externally of the injector so as to give rise to a combined spray formation reaching second target distance below the chamber ceiling at the radial distance from the primary nozzle axis, wherein the second target distance is larger than the first target distance.

Abstract: A fuel injector mountable with respect to a combustion chamber for delivering fuel thereto, the combustion chamber comprising a chamber ceiling and a chamber wall, the fuel injector comprising a nozzle body having a primary nozzle axis; a first outlet opening having a first axis; a second outlet opening having a second axis; and means for controlling fuel delivery through the first and second outlet openings. The means for controlling fuel delivery comprises an inner valve needle and an outer valve needle, and is arranged to permit fuel delivery from only the first outlet opening, or through both the first and second outlet openings together. The first and second outlet openings are oriented such that, in use, when fuel delivery is permitted through only said first outlet opening, a first spray formation is injected along the first axis, the first spray formation reaching a first target distance below said chamber ceiling at a radial distance from the primary nozzle axis.

Abstract: A fuel injector comprising a nozzle body, a first outlet opening having an axis, a second outlet opening having an axis, and means for controlling fuel delivery through the first and second outlet openings. The axes of the first and second outlet openings are arranged so as to intersect one another downstream of the outlet openings such that, when fuel is delivered through both the first and second outlet openings, a combined spray formation is formed which is substantially equivalent to a single spray formation having been delivered from a single opening.