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:
Jul. 12, 2011
Filed:
Apr. 25, 2008
Da Yu Wang, Troy, MI (US);
Sheng Yao, Macomb, MI (US);
Da Yu Wang, Troy, MI (US);
Sheng Yao, Macomb, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Systems and methods for determining an NHconcentration in exhaust gases from an engine are provided. In one exemplary embodiment, a method includes generating a first signal from an NHsensor fluidly communicating with the exhaust gases. The method further includes generating a second signal from an air humidity sensor disposed proximate to an air intake manifold of the engine indicating a humidity level. The method further includes determining an air/fuel ratio associated with the engine. The method further includes determining an NHdeviation value in a calibration table based on the second signal and the air/fuel ratio, utilizing a controller. The method further includes determining an NHconcentration value based on the first signal and the NHdeviation value, utilizing the controller. The NHconcentration value is indicative of the NHconcentration in the exhaust gases. The method further includes storing the NHconcentration value in a memory device, utilizing the controller.