Method for detecting the state of a catalytic converter system

US6901742B1 · kind B1 · utility

Assignee

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Axel Lang · Wolfenbüttel, DE
• Axel Wachtendorf · Klein Denkte, DE
• Uwe Kammann · Warberg, DE
• Harald Loeck · Wolfsburg, DE
• Rudolf Krebs · Wendeburg, DE
• Michael Daetz · Wolfsburg, DE
• Frank Wittig · Friedrichsthal, DE
• Axel Konig · Wemmel, BE

Key dates

• Filing date: Jun 23, 2000
• Grant date: Jun 7, 2005
• Expiry date: Aug 17, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for detecting a state of a catalyst system installed in an exhaust gas channel of an internal combustion engine of a motor vehicle, through which catalyst system exhaust gas from the internal combustion engine flows so that the exhaust gas can be purified, the process including the steps of: detecting at least one operating parameter of the catalyst system over a predetermined time period, determining a total energy output of the internal combustion engine within the predetermined time period, and calculating a characteristic value (k) based on a ratio of the at least one operating parameter to the total energy output.