Device for exhaust-gas purification, and an operating and monitoring for said device

US6935103B2 · kind B2 · utility

Assignees

• Daimlerchrysler AG · US
• Purem Abgassysyteme GmbH & Co. KG · DE

Inventors

• Klaus Binder · Munich, DE
• Peter Ebel · Taufkirchen, DE
• Gerhard Fraenkle · Winnenden, DE
• Alexander Funk · Durham, US
• Klaus-Juergen Marquardt · Winnenden, DE
• Ansgar Schaefer · Ehningen, DE
• Georg Huthwohl · Soest, DE
• Bernd Maurer · Balve, DE

Key dates

• Filing date: Feb 25, 2003
• Grant date: Aug 30, 2005
• Expiry date: Feb 25, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A device for exhaust-gas purification utilizes reduction of nitrogen oxides which are present in the exhaust gas from internal combustion engines by way of gaseous ammonia with an SCR catalytic converter. The functions of the device are monitored with regard to their line paths with connections, valves and sensors by referring to these elements themselves using suitable control circuitry via the evaluation and control unit.