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:
Jun. 11, 2019
Filed:
Dec. 29, 2014
Volkswagen Ag, Wolfsburg, DE;
Burkhard Veldten, Wolfsburg, DE;
Maciej Kulaszewski, Braunschweig, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Abstract
The invention relates to a method and to a motor vehicle for diagnosing an exhaust gas catalytic converter (), which is arranged in an exhaust gas tract () of an internal combustion engine () and is suitable for converting at least one exhaust gas component, wherein the exhaust gas tract () has an exhaust gas sensor () arranged upstream of the exhaust gas catalytic converter () and has an exhaust gas recirculation system (), which is designed to remove at least part of the exhaust gas from an exhaust gas duct () of the exhaust gas tract () downstream of the exhaust gas catalytic converter () and to feed the removed exhaust gas to the internal combustion engine (). The method comprises the following steps: measuring a first concentration (NOX) of the exhaust gas component upstream of the exhaust gas catalytic converter () by means of the exhaust gas sensor () during fueled operation of the internal combustion engine (), recirculating at least part of the exhaust gas by means of the exhaust gas recirculation system () during unfueled overrun of the internal combustion engine (), measuring a second concentration (NOX) of the exhaust gas component by means of the exhaust gas sensor () during the unfueled overrun of the internal combustion engine (), and determining a state of the exhaust gas catalytic converter () in dependence on the first and second concentrations (NOX, NOX) of the exhaust gas component.