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:
May. 02, 2017
Filed:
Dec. 20, 2013
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Jason Ronald Smith, Canton, MI (US);
John Paul Bogema, Flat Rock, MI (US);
Peter Mitchell Lyon, Birmingham, MI (US);
John Anthony Mangion, Plymouth, MI (US);
Kevin R. Murphy, Troy, MI (US);
Darrin Blaine Luke, South Lyon, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F02D 41/02 (2006.01); F01N 3/20 (2006.01); F01N 11/00 (2006.01); F02D 41/14 (2006.01); F02D 41/40 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0235 (2013.01); F01N 3/2066 (2013.01); F01N 11/00 (2013.01); F01N 2550/02 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1621 (2013.01); F02D 41/1461 (2013.01); F02D 41/1463 (2013.01); F02D 41/401 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract
Methods and systems are described for an engine with a SCR system including NOx sensors upstream and downstream of catalyst. One method includes monitoring SCR performance via calculating SCR conversion efficiency at different catalyst temperatures. Further, feedgas NOx levels are artificially increased when SCR device temperature is above a threshold to obtain more reliable readings from NOx sensors.