Fuel injection pump for internal combustion engines

US5782620A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heinz Nothdurft · Stuttgart, DE
• Wolfgang Fehlmann · Stuttgart, DE
• Bernhard Bonse · Stuttgart, DE
• Nestor Rodriguez-Amaya · Stuttgart, DE
• Ewald Eblen · Stuttgart, DE
• Holger Pitsch · Seligenstadt, DE
• Andreas Sterr · Leverkusen, DE
• Walter Fuchs · Stuttgart, DE
• Andreas Dutt · Stuttgart, DE
• Joerg Wolke · Stuttgart, DE

Key dates

• Filing date: Nov 15, 1996
• Grant date: Jul 21, 1998
• Expiry date: Nov 15, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M59/442
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection pump for internal combustion engines which has a moving part supported in a housing bore and on its jacket face on one side, has an exit opening that is under high pressure, and whose bearing is improved by virtue of the fact that on the jacket face of the part or in the wall of the housing bore, at least one pressure compensation is provided. The compensation face is connected to a high pressure source, is disposed on a side of the jacket face of the part which side is remote from the exit opening, and is continuously covered by the wall of the housing bore. As a result, a compensation of the pressure action by means of the pressure field prevailing in the region of the exit opening occurs so that an improved, less damage-prone bearing is produced with a greater high pressure tightness of the moving part.