Patent ID: 8186605

Claim:
A fluid injector comprising: a valve body having a recess, a valve needle being arranged axially movable in the recess preventing a fluid flow out of an injection nozzle which extends away from the recess in a closing position and enabling the fluid flow of the injection nozzle apart from the closing position and being mechanically coupled to an axial end of a first spring which is preloaded to exert a force on the valve needle towards the injection nozzle, a first armature mechanically coupled to the valve needle, a second armature arranged in the recess axially movable away and towards a protrusion of the valve body, and mechanically coupled to an axial end of a second spring which is preloaded to exert a force on the second armature, the first and second armature being arranged such that from a closing position of the valve needle to a first given position of the valve needle away from the closing position the first armature and the second armature are mechanically decoupled, and from the first given position of the valve needle to a position further away from the closing position, the first armature and the second armature are mechanically coupled, at least one adjusting tube arranged in the recess and configured to preload at least one of the first and second springs by a mechanical coupling, and a solenoid drive being designed and arranged to magnetically actuate the first armature and the second armature to move axially.