Injector for injecting fuel into internal-combustion engine, has injection hole formation area, where staged section is allocated near injection hole outlet to perimeter section of injection hole outlet at flow end face

摘要

The injector (1) has an injection hole formation area designed with injection holes for fuel injection. A hole axis of every injection hole is open regarding a fuel flow direction in end surface of a flow of the injection hole formation area. A staged section is allocated near an injection hole outlet to a perimeter section of the injection hole outlet at the flow end face, such that the injection hole outlet projects within the area of the injection hole outlet.