Fuel injection nozzle with an optimized fuel injection hole channel geometry as well as a method for the production of such a fuel injection hole channel geometry

摘要

The invention relates to a fuel injection nozzle for internal combustion engines, comprising a nozzle body (1) and a nozzle needle (3) guided therein. In a conical top area of the nozzle body (1) said nozzle has a spiral spray orifice channel (4). Such a spiral spray orifice channel (4) can be produced by means of a spark-erosion method according to which a correspondingly shaped electrode is advanced inside the nozzle body.