System and method for reducing nitrogen oxides in the exhaust of an internal combustion engine

US7152394B2 · kind B2 · utility

Assignee

• Nucellsys GmbH · DE

Inventors

• Uwe Benz · Giengen an der Brenz, DE
• Berthold Keppeler · Owen, DE
• Andre Martin · La Chaux-de-Fonds, CH
• Peter Schuerstedt · Wernau, DE
• Detlef Zur Megede · Kirchheim unter Teck, DE

Key dates

• Filing date: Jul 19, 2002
• Grant date: Dec 26, 2006
• Expiry date: Jul 19, 2022

Classification

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

Abstract

In a system and method for the reduction of nitrogen oxides in the exhaust of an internal combustion engine, the exhaust line of the internal combustion engine contains a DeNOx catalytic converter, in which the nitrogen oxides are reduced by means of hydrogen that is produced on-board the vehicle. The DeNOx catalytic converter is incorporated into a temperature-controlled heat exchanger, allowing the DeNOx catalytic converter to be operated within a desired temperature range, thereby improving the level of conversion.