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. 19, 2013
Filed:
Apr. 16, 2009
Tino Arlt, Regensburg, DE;
Thomas Baumann, Regensburg, DE;
Muammer Kilinc, Regensburg, DE;
Tim Walde, Regensburg, DE;
Tino Arlt, Regensburg, DE;
Thomas Baumann, Regensburg, DE;
Muammer Kilinc, Regensburg, DE;
Tim Walde, Regensburg, DE;
Continental Automotive GmbH, Hannover, DE;
Abstract
In a method and a device for the diagnosis of an NOx sensor () for an internal combustion engine, during a homogenous operation of the internal combustion engine, a base diagnostic value (NOx_DIAG_BAS) of the NOx sensor () is determined as a function of a reference value (I_REF) of a measuring signal of the NOx sensor () determined in a new state of the NOx sensor () and a current value (I_AV) of the measuring signal of the NOx sensor (). A time-dependent measuring value sequence (O2_EG_T) of the oxygen content of the exhaust gas in the exhaust gas system () is determined by the exhaust gas probe (). Depending on the measuring value sequence (O2_EG_T) of the oxygen content of the exhaust gas, and the base diagnostic value (NOx_DIAG_BAS) of the NOx sensor (), a corrected diagnostic value (NOx_DIAG_COR) is determined for the NOx sensor ().