Regulator apparatus for a fuel injection pump

Claim 1

A fuel injection pump for internal combustion engines with a fuel supply quantity regulator apparatus including a pump work chamber and a relief channel therefor, a pump housing, a fuel quantity control element, a rotary magnet system including a rotary magnet shaft having an eccentrically positioned driver disposed in said pump housing as a component part of said quantity control element, which, via said rotary magnet shaft, effects the effective control position of said control element which fixes the beginning or the end of delivery of injection by means of opening said relief channel of the pump work chamber, a return spring secured to said rotary shaft formed by a spiral spring, an inductive transducer coupled to said rotary magnet shaft, said rotary magnet system including a rotary magnet having a U-shaped core (20) including a base and shanks including poles having oppositely disposed circular segmental end faces (50), a magnet coil (21) in the base of said U-shaped core, a rotary armature having oppositely disposed arms having end faces (51) disposed between said core shanks and connected with said rotary magnet shaft, said end faces of said arms of said armature defining together with the end faces of each of said poles for a momentary part of an overlapping of respective end faces a conical air gap (52) which radial width decreases along a circumference defined between the end faces of said arms and poles and wherein said transducer is secured to said core adjacent said coil and positioned relative to said rotary armature for operation by rotation of said rotary armature.