Exhaust-gas purification system for an internal combustion engine

US6892529B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Frank Duvinage · Kirchheim unter Teck, DE
• Christian Goerigk · Hemmingen, DE
• Thomas Liebscher · Fellbach, DE
• Dieter Mainka · Echterdingen, DE
• Siegfried Mueller-Lunz · Schorndorf, DE
• Arno Nolte · Stuttgart, DE
• Markus Paule · Bad Marienberg, DE

Key dates

• Filing date: Feb 25, 2003
• Grant date: May 17, 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

An Exhaust-gas purification system for an internal combustion engine, which, as seen in the direction of flow of the exhaust gas, has a particle filter, apparatus for providing a reducing agent in the exhaust-gas flow, a catalytic converter for reducing nitrogen oxide which is present in the exhaust gas, and a downstream oxidation catalytic converter. An upstream oxidation catalytic converter is arranged upstream of the particle filter.