Method for operating a three-way catalyst of an internal combustion engine

US6550236B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Eberhard Schnaibel · Hemmingen, DE
• Andreas Koring · Ludwigsburg, DE
• Holger Bellmann · Ludwigsburg, DE
• Thomas Wahl · Pforzheim, DE
• Andreas Blumenstock · Ludwigsburg, DE
• Klaus Winkler · Rutesheim, DE
• Frank Stanglmeier · Heubach, DE
• Bernd Schumann · Rutesheim, DE

Key dates

• Filing date: Nov 30, 2001
• Grant date: Apr 22, 2003
• Expiry date: Nov 30, 2021

Classification

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

Abstract

An internal combustion engine (1), especially for a motor vehicle, is described, which has a three-way catalytic converter (12″) and a storage catalytic converter (12′) which can be loaded with and unloaded of nitrogen oxides. A diagnosis of the storage catalytic converter (12′) is carried out by a control apparatus (18) below a temperature at which the three-way catalytic converter (12″) does not yet operate.