Process and device for operating an internal combustion engine with less pollutant emission

US6269631A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Willi Neff · Kelmis, BE
• Klaus Pochner · Gerolzhofen, DE
• Gerhard Lepperhoff · Eschweiler, DE
• Georg Lutkemeyer · Würselen, DE

Key dates

• Filing date: Apr 14, 1999
• Grant date: Aug 7, 2001
• Expiry date: Apr 14, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N3/2882
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process and device for operating an internal combustion engine with less pollutant emission, whose exhaust gas is subjected to an electrical aftertreatment during engine operation to convert pollutants, the emissions of which are measured. To improve a process with the features mentioned initially, so that on the one hand the desired reduction of emissions of the internal combustion engine is achieved during its entire time of operation, but on the other hand so that the design of the electrical system of the internal combustion engine does not have to be unreasonably large and thus costly, the electrical aftertreatment of the exhaust gas occurs only during the portion of the operating time during which emission peaks occur.