Injector Nozzle

An injector nozzle (1, Fig. 1) of a fuel injector for supplying gaseous fuel to an internal combustion engine, and comprising: a valve needle 4 and a nozzle body 2 provided with a bore (14, Fig. 1) within which the valve needle 4 is moveable, and a valve seat 16 defined at a proximal end of the bore (14, Fig. 1) and transitioning into a sac 25 that defines a sac volume 26; the valve needle 4 is moveable relative to the valve seat 16 to control fuel delivery through a first set of nozzle outlets 27 and a second set of nozzle outlets 28, respectively defining first and second rows of openings 30, 32 in a wall of the sac 25; the valve needle 4 includes a seat region 52 and a fuel guiding region 54 extending proximally from the seat region 52 such that in a non-injecting state, the seat region 52 seats against the valve seat 16 and the fuel guiding region 54 extends into the sac volume 26, and in an injecting state the seat region 52 is unseated from the valve seat 16 and the fuel guiding region 54 interacts with the bore (14, Fig. 1) to guide fuel from the valve seat 16 to at least one of the first and second sets of nozzle outlets 27,28.