Method for the operation of an internal combustion engine comprising an emission control system that includes an SCR catalyst

US8498798B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Thomas Koch · Remchingen, DE
• Alexander Massner · Eßlingen, DE
• Anke Traebert · Stuttgart, DE

Key dates

• Filing date: Jan 26, 2010
• Grant date: Jul 30, 2013
• Expiry date: Jul 27, 2030

Classification

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

Abstract

A method for operating an internal combustion engine comprising an exhaust gas cleaning system that includes a SCR catalyst. In conjunction with a cold start and/or a warm-up of the internal combustion engine, the internal combustion engine is operated using a cold start engine operation method having predefineable values for predefineable operating parameters of the internal combustion engine. An amount of nitrogen oxides stored in the SCR catalyst is estimated, and the cold start engine operation method is activated when the estimation indicates that the nitrogen oxide storage amount exceeds a predefineable nitrogen oxide storage amount limit value.