Fuel injection valve for internal combustion engines

US5746181A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Friedrich Boecking · Stuttgart, DE
• Stefan Haug · Waldenbuch, DE

Key dates

• Filing date: Nov 12, 1996
• Grant date: May 5, 1998
• Expiry date: Nov 12, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M61/168
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection valve for internal combustion engines, having a pistonlike valve member, which is axially displaceably guided in a valve body that is braced axially by means of an adjusting nut against a valve retaining body. To avoid breakage of the valve body in a region of an inlet opening of an fuel inlet conduit into a pressure chamber on the valve body, which region is subject to very high pressure forces, a stop face formed by the end face toward the combustion chamber, of the adjusting nut and a counterpart stop, that cooperates with the stop face, in the housing of the engine and also the annular shoulder of the adjusting nut that encompasses the valve body and the annular step, cooperating with the annular shoulder, of the valve body are embodied conically.