Pressure valve assembly for fuel injection pumps

US4577606A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wilfried Bohringer · Flein, DE
• Franz Eheim
• Wolfgang Fehlmann · Stuttgart, DE
• Helmut Laufer · Gerlingen, DE
• Karl Zibold · Asperg, DE

Key dates

• Filing date: Nov 13, 1984
• Grant date: Mar 25, 1986
• Expiry date: Nov 13, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7774
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a pressure valve inserted in a fuel supply conduit between a fuel injection pump and an injection vavle of the internal combustion chamber and comprising a valve member and a locking member cooperating with the valve member and opening in the direction of the fuel supply, and a back-pressure relief valve including a closing element which closes an axial bore of the locking member, a throttle orifice is provided in the connection between the axial bore of the locking member and an axial recess formed in the connection element connected to the fuel supply conduit leading to the internal combustion engine so that no after-injections occur, and a sufficiently great stable pressure is maintained in the fuel supply system.