Patent ID: 8028937

Claim:
A fuel injection valve configured for injecting fuel into a combustion chamber of an internal combustion engine, said fuel injection valve comprising a fuel inlet configured to allow fuel to flow into the fuel injection valve, an actuating device configured to be electrically activated and to cooperate via a fuel outlet, the actuating device having a plurality of solenoid arrangements which are configured to be energized, a substantially magnetically soft magnet yoke arrangement which cooperates therewith, and a substantially magnetically soft magnet armature arrangement which cooperates therewith, wherein the magnet yoke arrangement comprises at least two yoke discs adapted to be arranged along an axis of an actuating rod, wherein the at least two yoke discs are separated by at least one spacer which determines a dimension of a cavity between the at least two yoke discs along the axis of the actuating rod, wherein at least one side faces of each yoke disc arranged substantially in a plane that is perpendicular to the axis of the actuating rod and has at least one pole web disposed thereon which, together with the solenoid arrangement, is configured to acts upon the magnet armature arrangement, and wherein each yoke disc comprises at least two partial yokes which contain soft iron and at least partly surround the actuating rod, wherein the actuating rod supports the magnet armature arrangement.