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:
Sep. 26, 2006
Filed:
Sep. 16, 2004
Danan Dou, Tulsa, OK (US);
Owen H. Bailey, Lake Orion, MI (US);
Danan Dou, Tulsa, OK (US);
Owen H. Bailey, Lake Orion, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A process for controlling an exhaust system can comprise flowing exhaust gas from the engine past a first oxygen sensor, through a NOadsorber, past a second oxygen sensor, through a catalyst and past a third oxygen sensor, wherein the first oxygen sensor, the second oxygen sensor, and the third oxygen sensor, are in operable communication with an electronic control module, and using a switching delay between the first oxygen sensor and the second oxygen sensor to determine a NOvalue, wherein the NOvalue is selected from the group consisting of a NOregeneration time, a stored NOamount, a NOstorage efficiency, and combinations comprising at least one of the foregoing NOvalues. A desulfurization process can be initiated when the NOvalue is less than or equal to a first selected value. During the desulfurization process, when the third oxygen sensor signals a condition rich of stoichiometry, oxygen can be provided to the catalyst.