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:
May. 10, 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
A method for operating a nitrogen oxide (NOx) storage catalytic converter () of an internal combustion engine () includes storing nitrogen oxides (NOx), which are generated by the engine (), in a first operating phase in the NOx storage catalytic converter (). In a second operating phase, nitrogen oxides stored in the NOx storage catalytic converter () are discharged from the NOx storage catalytic converter (). The start of the second operating phase is determined based on a nitrogen oxide (NOx) fill level (mnosp) of the NOx storage catalytic converter () and the NOx fill level (mnosp) is modeled based on a nitrogen oxide (NOx) storing model (). To be able to precisely and reliably determine the start and the end of the second operating phase, a first value of the nitrogen oxide (NOx) mass flow (msnonk_s) rearward of the NOx storage catalytic converter () is detected and the NOx storing model () is corrected in dependence upon the detected first value.