COMMON RAIL INJECTOR HAVING SPIRAL SPRAY NOZZLE

The present disclosure relates to a common rail injector having a swirl spray nozzle which has a tip having an orifice at a lower end portion of a housing. An upper portion of the tip is closed by means of a cup-shaped nozzle portion, the nozzle portion has a cylindrical side wall surface, a flat base which terminates an upper portion of the side wall surface, and one or more nozzle holes which allow the hollow portion and the orifice to communicate with each other, and the nozzle holes are formed in a tangential direction of the orifice so as to inject fuel in a swirl manner.