The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2012
Filed:
May. 15, 2009
Hans-georg Nitzke, Wettmershagen, DE;
Jörg Larink, Haren/Ems, DE;
Jens Jeschke, Braunschweig, DE;
Thomas Lang, Wolfsburg, DE;
Jürgen Wendt, Wolfsburg, DE;
Achim Freitag, Wolfenbüttel, DE;
Jörn Müller, Sickte, DE;
Axel Groenendijk, Gifhorn, DE;
Lothar Nee, Wolfsburg, DE;
Uwe Scher, Cremlingen/Destedt, DE;
Werner Aberle, Leiferde, DE;
Dieter Mannigel, Braunschweig, DE;
Hans-Georg Nitzke, Wettmershagen, DE;
Jörg Larink, Haren/Ems, DE;
Jens Jeschke, Braunschweig, DE;
Thomas Lang, Wolfsburg, DE;
Jürgen Wendt, Wolfsburg, DE;
Achim Freitag, Wolfenbüttel, DE;
Jörn Müller, Sickte, DE;
Axel Groenendijk, Gifhorn, DE;
Lothar Nee, Wolfsburg, DE;
Uwe Scher, Cremlingen/Destedt, DE;
Werner Aberle, Leiferde, DE;
Dieter Mannigel, Braunschweig, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
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.