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. 14, 2022
Filed:
Jul. 26, 2019
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 3/20 (2006.01); F01N 3/035 (2006.01); F02D 41/02 (2006.01); F01N 13/00 (2010.01); B01D 53/94 (2006.01); B01D 46/00 (2022.01);
U.S. Cl.
CPC ...
F01N 3/208 (2013.01); B01D 46/0027 (2013.01); B01D 53/9418 (2013.01); B01D 53/9495 (2013.01); F01N 3/035 (2013.01); F01N 13/0093 (2014.06); F02D 41/029 (2013.01); F01N 2610/02 (2013.01); F01N 2610/146 (2013.01); F01N 2900/0416 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1404 (2013.01);
Abstract
A method of controlling an exhaust system for a diesel engine comprises providing an aftertreatment system comprising a first catalyst and a diesel exhaust fluid injection system, determining a preliminary dose of a diesel exhaust fluid of the diesel exhaust fluid injection system based on an incoming exhaust gas flow and an exhaust gas temperature, determining an NHfactor based on incoming exhaust gas oxygen concentration and the incoming exhaust gas flow temperature, and determining a final dose of diesel exhaust fluid by multiplying the preliminary dose of diesel exhaust fluid by the NHfactor.