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:
Mar. 22, 2005
Filed:
Dec. 12, 2003
Thorsten Lange, Braunschweig, DE;
Burkhard Veldten, Edemissen, DE;
Thorsten Lange, Braunschweig, DE;
Burkhard Veldten, Edemissen, DE;
Volkswagen AG, Wolfsburg, DE;
Abstract
For determining the exhaust gas recirculation mass flow and the exhaust gas recirculation rate of an internal combustion engine () dependent on this, it is proposed, while said internal combustion engine () is in operation, to adapt a characteristic curve, determined before said internal combustion engine () is initially started up, representing the cylinder mass flow (dm) supplied to the cylinders of said internal combustion engine (), which is composed of the fresh air mass flow (dm) and the exhaust mass flow recirculated via an exhaust gas recirculation pipe (), to said fresh air mass flow (dm), known for various operating points of said internal combustion engine. The exhaust gas recirculation mass flow (dm) is then determined as a function of said fresh air mass flow (dm), measured at a particular transient operating point of said internal combustion engine, using the adapted characteristic curve of said cylinder mass flow (dm).