Internal combustion engine and method of operating same

US6711894B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Ralf Bruenemann · Stuttgart, DE
• Eberhard Holder · Eßlingen, DE
• Roland Kemmler · Stuttgart, DE
• Christoph Koehlen · Wernau, DE
• Martin Matt · Weingarten, DE

Key dates

• Filing date: May 2, 2002
• Grant date: Mar 30, 2004
• Expiry date: May 2, 2022

Classification

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

Abstract

An internal combustion engine has a preparation device for fuel, for the purpose of providing a starting fuel which comprises low-boiling fuel constituents. A catalytic converter is accommodated in an exhaust train of the internal combustion engine. After-treatment of the exhaust gases is carried out by a secondary air device, by means of the combustion being carried out with an excess of starting fuel for rich-burn operation during the cold start and the subsequent warm-up phase. The system is provided for spark-ignition mixture-compressing or spark-ignition direct injection internal combustion engines.