Electromagnetically actuatable valve, in particular a fuel injection valve

US4436071A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Udo Hafner · Munich, DE
• Harro Herth · Schwieberdingen, DE
• Wolfgang Kienzle · Hemmingen, DE
• Heinrich Knapp · Leonberg, DE
• Rudolf Krauss · Stuttgart, DE
• Manfred Lembke · Gerlingen, DE
• Werner Paschke · Schwieberdingen, DE
• Rudolf Sauer · Memmingen, DE

Key dates

• Filing date: Aug 17, 1982
• Grant date: Mar 13, 1984
• Expiry date: Aug 17, 2002

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M61/188
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An electromagnetically actuatable valve, especially an injection valve for fuel injection systems which supply internal combustion engines with fuel, is proposed in which the fuel injection valve encompasses a valve chamber and a core upon which a magnetic coil is mounted by means of a carrier body. Fuel supply openings discharge into a flow passage provided around the magnetic coil. Vapor bubbles dissolved in the fuel may be flushed out of the flow passage via a first restriction into fuel return openings which communicate with a fuel return line. On the other hand, the fuel may flow from the flow passage into the collecting chamber which houses a valve component and a valve seat. Vapor bubbles which may appear near the valve component may be flushed out via a second restriction which is provided in the interior of a core to reach the fuel return openings. Thus, disturbances with fuel injection, especially during the "hot start" of the internal combustion engine, are avoided.