Diesel Technology Company

Kenneth R Potter

Robert D Straub

Randall Clare Harkema

Beckie J DeYoung

Stacy Jean Shorey

An electromechanically actuated fuel injector and a solenoid stator assembly for an electromechanically actuated fuel injector are disclosed. The solenoid stator assembly comprises a cup shaped stator core assembly comprised of a plurality of magneto-conductive wire members of a predetermined length arranged in parallel, adjacent and abutting relationship relative to an adjacent wire member. These wire members are bound at one end thereof for some length less than the entire length of the wire members to form a central pole piece, and splayed umbrella like about the central pole piece at the opposite end thereof to form a first pole piece in concentrically spaced relationship relative to said center pole piece. The stator core thereby has a circular top portion and an open end disposed opposite said top portion and facing an armature in the fuel injector. The first pole piece is cylindrical in shape and substantially circular in cross-section extending in a direction perpendicular to said circular top portion, and the center pole piece is concentrically disposed in spaced relationship relative to said cylindrical first pole piece and extends in a direction perpendicular to said cylindrical top portion.

Solenoid stator assembly for an electromechanically actuated fuel

A device is provided for pumping fuel through an internal combustion engine, comprising a pump cylinder and a piston reciprocable within the pump cylinder to define a pump chamber open at one end in which fuel is pressurized during a pump stroke of the piston. A fuel supply means is provided for supplying fuel to the pump chamber. The fuel supply means includes an electromagnetically actuated fuel control valve having an armature secured thereto, with the armature residing in a fuel-filled armature cavity. The armature electromagnetically cycled between a first position closing the fuel control valve and thereby closing the flow of fuel to the pumping chamber and a second position opening the control valve thereby allowing fuel to flow to the pumping chamber. The armature is a flat plate secured to the control valve and constructed with a series of flow through holes and/or slots of prescribed geometry to (i) assist in precluding cavitation errosion of the armature and/or fastener securing it to the control valve by the fuel within the armature cavity, and (ii) to enhance the hysteresis characteristics of the fuel control valve. Various embodiments are provided.

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Kalamazoo, MI, United States of America

Kenneth R Potter