Internal combustion engine with an exhaust-gas recirculation and method for operating an internal combustion engine

US8091535B2 · kind B2 · utility

Assignee

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Hans-Georg Nitzke · Wettmershagen, DE
• Jörg Larink · Haren (Ems), DE
• Jens Jeschke · Braunschweig, DE
• Thomas Lang · Schwäbisch Hall, DE
• Jürgen Wendt · Wolfsburg, DE
• Achim Freitag · Bitterfeld-Wolfen, DE
• Jörn Müller · Sickte, DE
• Axel Groenendijk · Gifhorn, DE
• Lothar Nee · Wolfsburg, DE
• Uwe Scher · Lehre, DE
• Werner Aberle · Leiferde, DE
• Dieter Mannigel · Braunschweig, DE

Key dates

• Filing date: May 15, 2009
• Grant date: Jan 10, 2012
• Expiry date: Jul 31, 2029

Classification

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

Abstract

An internal combustion engine has a high-pressure exhaust-gas recirculation line and a low-pressure exhaust-gas recirculation line with a low-pressure exhaust-gas recirculation valve. The low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system downstream of a turbine of an exhaust-gas turbocharger and opens into a fresh-air system upstream of a compressor of the exhaust-gas turbocharger. An exhaust-gas flap is disposed in the exhaust-gas system downstream from where the low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system. At least one pressure sensor is disposed in the low-pressure exhaust-gas recirculation line and configured such that the at least one pressure sensor determines a pressure difference in the low-pressure exhaust-gas recirculation line between a point upstream of the low-pressure exhaust-gas recirculation valve and a point downstream of the low-pressure exhaust-gas recirculation valve. A method for operating an internal combustion engine is also provided.