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. 14, 2017
Filed:
Nov. 21, 2013
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Burkhard Veldten, Edemissen, DE;
Maciej Kulaszewski, Braunschweig, DE;
VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg, DE;
Abstract
A method for diagnosing an exhaust-gas catalytic converter () arranged in an exhaust-gas system () of an internal combustion engine () for the catalytic conversion of at least one exhaust-gas component from the internal combustion engine (), which has an exhaust-gas recirculation means with which a partial stream of the exhaust gas can be drawn off downstream of the catalytic converter () and fed into the combustion air of the internal combustion engine (), involves determining the current raw emission (NOraw) of the internal combustion engine () in of the exhaust-gas component; measuring the current concentration of the exhaust-gas component (NOmeas) in the exhaust gas upstream of the catalytic converter (); and determining a diagnostic value for the catalytic converter () in terms of the conversion of the exhaust-gas component as a function of the modelled raw emission (NOraw) from the internal combustion engine () and the measured concentration of the exhaust-gas component (NOmeas). The invention further relates to a diagnostic device configured to perform the method and a motor vehicle having such a device.