Electromagnetically actuatable fuel injection valve

US4786030A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Max Greiner · Gerlingen, DE
• Udo Hafner · Munich, DE
• Waldemar Hans · Bamberg, DE
• Heinrich Knapp · Leonberg, DE
• Wolfgang Kramer · Jena, DE
• Rudolf Krauss · Stuttgart, DE
• Ferdinand Reiter · Markgröningen, DE
• Peter Romann · Stuttgart, DE
• Rudolf Sauer · Memmingen, DE

Key dates

• Filing date: Nov 24, 1987
• Grant date: Nov 22, 1988
• Expiry date: Nov 24, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M51/08
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An electromagnetically actuatable fuel injection valve which serves to supply fuel to a mixture-compressing internal combustion engine having externally supplied ignition. The fuel injection valve includes a valve housing with a mouth piece, in which a valve seat body is disposed, included are two magnet coils two cores and one armature, which has a spherical guide section and the later is being connected to a valve needle. The spherical guide section is slidably supported with its circumference in a guide bore of the valve seat body and in its stroke movement away from the core is limited by a tapering stop opening which adjoins the guide bore. Flat faces are provided on the circumference of the spherical guide section, such that they decrease the area of contact between the spherical contact section and the stop opening.