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. 12, 2021
Filed:
Oct. 23, 2018
Fev Europe Gmbh, Aachen, DE;
Arun Palaniappan Muthukaruppan, Aachen, DE;
Henning Gero Petry, Aachen, DE;
FEV Europe GmbH, Aachen, DE;
Abstract
Exhaust gas treatment system () for a motor vehicle, comprising a first catalytic converter (-) for selective catalytic reduction; a second catalytic converter (-) for selective catalytic reduction; a first nitrogen oxide sensor (-) upstream of the first catalytic converter (-) for detecting a first nitrogen oxide value (NOx-1); a second nitrogen oxide sensor (-) between the first and the second catalytic converter (--) for detecting a second nitrogen oxide value (NOx-2); a third nitrogen oxide sensor (-) downstream of the second catalytic converter (-) for detecting a third nitrogen oxide value (NOx-3); an electronic evaluation device () for calculating a first efficiency of the first catalytic converter (-) on the basis of the first and the second nitrogen oxide value (NOx-1; NOx-2), a second efficiency of the second catalytic converter (-) on the basis of the second and the third nitrogen oxide value (NOx-2; NOx-3) and a total efficiency of the exhaust gas treatment system () on the basis of the first and the third nitrogen oxide value (NOx-1; NOx-3); and a fault determination unit () for ascertaining a cause of a fault on the basis of an assignment matrix () which assigns a cause of a fault on the basis of the first efficiency, the second efficiency and the total efficiency.