Robert Boschgmbh

Christiane Glumann

Ferdinand Reiter

Norbert Keim

Martin Mueller

Christian Preussner

Thomas Sebastian

Andreas Eichendorf

Rainer Norgauer

Gerhard Stokmaier

Ottmar Martin

Bo Yuan

Rainer Schneider

Dietrich Schuldt

A fuel injection valve for fuel injection systems of internal combustion engines includes a core which serves as the internal pole is made of a soft magnetic powder composite material. This powder composite material is an iron powder provided with a polymer additive, where the individual iron particles are coated with an electrically insulating layer. Such a powder composite material ensures a substantial minimization of eddy currents in the magnetic circuit in comparison with materials known previously, such as chromium steel, which are usually used as magnetic materials. The core which is mechanically sensitive and is sensitive to fuel is encapsulated at least with respect to the parts of the injection valve carrying the fuel. A sleeve passes through an internal longitudinal opening in the core which permits fuel flow in its interior and is fixedly attached to a pole part which seals the core toward the bottom. The core and the magnetic coil are thus not exposed to any wetting by fuel. This fuel injection valve is especially suitable for use in fuel injection systems of internal combustion engines with mixture compression and external ignition.

Fuel injection valve

Growing community of inventors

Stuttgart, Germany

Christiane Glumann