FUEL INJECTION NOZZLE

摘要

A fuel injection nozzle, particularly of a Diesel engine and an inter-cylinder type gasoline engine, for providing a swirl that induces a swirl flow of a fuel inside a nozzle hole (13) to increase spread of atomization, promoting mixing of the fuel with air within a short time to improve combustion performance of the engine, and capable of controlling an atomization distribution direction. Characterized in that a swirl flow is induced inside a nozzle hole (13) itself having a nozzle hole inlet (24), a nozzle hole main portion (23) and a nozzle hole outlet (25), the sectional shape of the nozzle hole inlet (24) or the nozzle hole outlet (25) of the nozzle hole (13) is deviated from the axis of the nozzle hole (13), the sectional area of the nozzle hole inlet (24) of the nozzle hole (13) is set to be smaller than the sectional area of the nozzle hole main portion (23) and an open sectional area of the nozzle hole inlet (24) is deviated from an open section of the nozzle hole main portion (23).