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. 07, 2005
Filed:
Jul. 11, 2001
Eberhard Schnaibel, Hemmingen, DE;
Klaus Winkler, Rutesheim, DE;
Eberhard Schnaibel, Hemmingen, DE;
Klaus Winkler, Rutesheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for operating a nitrogen oxide (NOx) storage catalytic converter (). During a first operating phase of the storage catalytic converter (), nitrogen oxides are stored and, during a second operating phase, stored nitrogen oxides are discharged from the converter (). The stored quantity of nitrogen oxides is determined during the first operating phase. In order to be able to determine start and end of the second operating phase as accurately as possible, a quantity, which characterizes the discharge quantity of nitrogen oxides, is determined during the second operating phase and compared to the stored quantity of nitrogen oxides determined during the first operating phase. With the comparison, a plausibility check and a calibration of the output signal of a nitrogen oxide (NOx) sensor () can take place. The nitrogen oxide (NOx) sensor () is disposed downstream of the storage catalytic converter ().