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:
Nov. 17, 2015
Filed:
May. 15, 2012
Applicants:
Min Sun, Troy, MI (US);
Kevin L. Perry, Fraser, MI (US);
Inventors:
Min Sun, Troy, MI (US);
Kevin L. Perry, Fraser, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 41/02 (2006.01); F01N 9/00 (2006.01); F01N 3/20 (2006.01); F02D 41/14 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0235 (2013.01); F01N 3/2066 (2013.01); F01N 9/00 (2013.01); F02D 41/1475 (2013.01); F01N 2560/026 (2013.01); F01N 2560/06 (2013.01); F01N 2560/07 (2013.01); F02D 41/1445 (2013.01); F02D 2200/0802 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract
A system according to the principles of the present disclosure includes a storage estimation module and an air/fuel ratio control module. The storage estimation module estimates a first amount of ammonia stored in a first selective catalytic reduction (SCR) catalyst and estimates a second amount of ammonia stored in a second SCR catalyst. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the first amount, the second amount, and a temperature of a substrate disposed in the second SCR catalyst.