Method for assessing an injection behaviour of at least one injection valve in an internal combustion engine and operating method for an internal combustion engine

US9458809B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Joos · Walheim, DE
• Werner Hess · Stuttgart, DE
• Andreas Koch · Heiligenhaus, DE
• Ruben Schlueter · Yokohama, JP
• Holger Rapp · Hemmingen, DE
• Haris Hamedovic · Heubach, DE
• Joerg Koenig · Stuttgart, DE
• Harry Friedmann · Renningen, DE
• Achim Hirchenhein · Trier, DE
• Christoph Heisen · Munich, DE
• Christian Reschke · Leonberg, DE
• Stephanie Wirth · Renningen, DE

Key dates

• Filing date: Aug 6, 2012
• Grant date: Oct 4, 2016
• Expiry date: Mar 29, 2033

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 for assessing an injection behavior of at least one injection valve of an internal combustion engine includes putting the internal combustion engine into a special operating mode defined by control parameters and operating the engine in the special operating mode during a diagnostic time period, at least one operating parameter of the internal combustion engine being determined at least during the diagnostic time period, and at least one quantity characterizing the injection behavior of the at least one injection valve being evaluated at least during a segment of the diagnostic time period and being evaluated on the basis of the at least one operating parameter.