Method of reducing the NO.sub.x emission of a supercharged piston-type internal combustion engine

US5671600A · kind A · utility

Assignee

• FEV Motorentechnik GmbH & Co., KG · DE

Inventors

• Franz Pischinger · Aachen, DE
• Manfred Dürnholz · Oberstenfeld, DE
• Gerhard Lepperhoff · Eschweiler, DE
• Georg Huthwohl · Soest, DE

Key dates

• Filing date: Nov 9, 1995
• Grant date: Sep 30, 1997
• Expiry date: Nov 9, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method of reducing NO.sub.x emissions of a turbo-charged internal combustion engine. The engine has an exhaust conduit guiding an exhaust gas stream, a charge-air intake conduit guiding a charge-air stream and a turbocharger including a turbine disposed in the exhaust conduit and a compressor disposed in the charge-air intake conduit. The method comprises the steps of branching off a partial exhaust gas quantity from the exhaust gas stream upstream of the turbine as viewed in a direction of exhaust gas flow; passing the partial exhaust gas quantity through a particle filter; and introducing the partial exhaust gas quantity into the charge-air stream upstream of the compressor.