Method and device for operating an internal combustion engine operating with an excess of air

US6173568A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Jurgen Zurbig · Burgkunstadt, DE
• Rainer Tost · Wendelstein, DE
• Winfried Dolling · Weißenbrunn, DE
• Reinhard Latsch · Leinfelden, DE

Key dates

• Filing date: Sep 16, 1998
• Grant date: Jan 16, 2001
• Expiry date: Sep 16, 2018

Classification

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

Abstract

A bypass leads away from the exhaust pipe and the bypass flow is set with an electrically actuable exhaust gas valve. Under certain operating states of the internal combustion engine, in particular when the load is increasing rapidly or during warmup, a portion or the entire exhaust gas flow is diverted through a combined hydrolysis/adsorption catalytic converter in the bypass line. The NO.sub.x contained in the exhaust gas is adsorbed in a particularly favorable manner.