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:
Apr. 25, 2017
Filed:
Oct. 14, 2009
Applicants:
Kevin Andrew Gady, Ypsilanti, MI (US);
Amin Abboud, Livonia, MI (US);
Inventors:
Kevin Andrew Gady, Ypsilanti, MI (US);
Amin Abboud, Livonia, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); F01N 9/00 (2006.01); F01N 11/00 (2006.01);
U.S. Cl.
CPC ...
F01N 3/208 (2013.01); F01N 9/00 (2013.01); F01N 11/00 (2013.01); F01N 2560/026 (2013.01); F01N 2560/06 (2013.01); F01N 2900/0404 (2013.01); F01N 2900/1616 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract
A system includes a filtering module that filters a first signal that indicates an amount of nitrogen oxides (NOx) in exhaust gas upstream from a catalyst, and that filters a second signal that indicates amounts of NOx and ammonia (NH3) in exhaust gas downstream from the catalyst. A slip determination module determines whether NH3 is present in exhaust gas downstream from the catalyst based on a frequency response of the first and second signals.