Fuel injector, particularly common rail injector, for injecting fuel into combustion chamber of internal-combustion engine, has injection valve element that is adjusted in axial direction

摘要

The fuel injector (1), particularly common rail injector, has an injection valve element (8) that is adjusted in an axial direction between a closing position and an opening position. The injection valve element is assigned to a controlling chamber. A valve spring has an axial section, where an envelope contour of the valve spring is provided with a tapering diameter.