Process for checking a burner system for heating a catalytic converter

US5634330A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Erwin Achleitner · Obertraubling, DE
• Achim Koch · Tegernheim, DE

Key dates

• Filing date: May 30, 1996
• Grant date: Jun 3, 1997
• Expiry date: May 30, 2016

Classification

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

Abstract

In order to diagnose a burner air ratio, a fuel/air mixture of an internal combustion engine is either enriched or diluted during operation of the burner as a function of an instantaneous state of the mixture. Resulting signal levels of lambda probes disposed upstream and downstream of the catalytic converter are evaluated.