Multi-cylinder air-compressing injection-type internal-combustion engine

US6141959A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Steffen Digeser · Fellbach, DE
• Frank Duvinage · Kirchheim unter Teck, DE
• Walter Friess · Stuttgart, DE
• Alexander Funk · Durham, US
• Anton Kerckhoff · Stuttgart, DE
• Bernd Krutzsch · Köngen, DE
• Detlef Scharr · Waiblingen, DE
• Michel Weibl · Stuttgart, DE
• Guenter Wenninger · Stuttgart, DE

Key dates

• Filing date: Jul 16, 1998
• Grant date: Nov 7, 2000
• Expiry date: Jul 16, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A multi-cylinder air-compressing injection-type internal-combustion engine having a nitric oxide adsorber catalyst and an exhaust gas return device. In order to increase the hydrocarbon fraction in the exhaust gas in front of an exhaust gas aftertreatment device during a regeneration phase and to reduce the oxygen content, exhaust gas pipes of the cylinders are divided into at least two flows, which extend separately from one another at least along a distance. An increased hydrocarbon emission is generated exclusively in the cylinders of one of the flows at times. Another of the flows is connected by way of the exhaust gas return device with an air intake pipe of the internal-combustion engine.