Process and system for automatically controlling the fraction of the exhaust gas quantity returned to an internal-combustion engine

US6595191B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Tillmann Braun · Winnenden, DE
• Uwe Gartner · Winnenden, DE

Key dates

• Filing date: Mar 19, 2002
• Grant date: Jul 22, 2003
• Expiry date: Mar 19, 2022

Classification

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

Abstract

A process and system are provided for automatically controlling the fraction of the exhaust gas quantity returned to an internal-combustion engine with respect to the mixture quantity fed on the whole to the internal-combustion engine, which mixture quantity is formed by the returned exhaust gas quantity and a fresh air quantity. The actual fraction of the returned exhaust gas quantity with respect to the mixture quantity fed on the whole to the internal-combustion engine is determined by sensors from measurements of the temperature of the fed fresh air quantity, the temperature of the returned exhaust gas quantity and the temperature of the mixture quantity fed as a whole. This actual fraction of the returned exhaust gas quantity is adapted to a predetermined desired fraction. In the case of a further process, the actual fraction of the returned exhaust gas quantity with respect to the mixture quantity fed on the whole to the internal-combustion engine is determined by at least one sensor from at least one measurement of the temperature of the exhaust gas flowing out of the internal-combustion engine, and this actual fraction of the returned exhaust gas quantity is adapted to a pr…