Method and device for diagnosing the failure of a fuel delivery device in a fuel system

US6536415B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Joos · Walheim, DE
• Mathias Rollwage · Ditzingen, DE
• Karsten Kroepke · Ludwigsburg, DE
• Jens Wolber · Gerlingen, DE
• Thomas Frenz · Nördlingen, DE
• Manfred Kirschner · Stuttgart, DE
• Klaus-Dieter Hufnagel · Heubach, DE
• Ingo Richter · Markgröningen, DE
• Markus Amler · Rutesheim, DE

Key dates

• Filing date: Mar 5, 2001
• Grant date: Mar 25, 2003
• Expiry date: Mar 5, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method and a device are described for diagnosing a fuel system having a plurality of electric fuel delivery units, which are submerged on the inlet side in a fuel supply contained in a fuel tank, and which, on the outlet side, deliver fuel in a fuel line to an internal combustion engine. The currents of the electric fuel delivery units are measured directly or indirectly in an analysis unit, compared to one another, and a diagnostic signal in digitized form is generated as a function of the result of the comparison.