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. 07, 2024
Filed:
Aug. 25, 2020
Applicant:
Paccar Inc, Bellevue, WA (US);
Inventors:
Charles Wayne Reinhardt Swart, Bellingham, WA (US);
Cynthia Chaffin Webb, Sedro-Woolley, WA (US);
Maarten Meijer, Anacortes, WA (US);
Varun Ramesh, Bellingham, WA (US);
Assignee:
PACCAR INC, Bellevue, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); F01N 3/10 (2006.01); F01N 11/00 (2006.01);
U.S. Cl.
CPC ...
F01N 3/208 (2013.01); F01N 3/108 (2013.01); F01N 11/002 (2013.01); F01N 2550/05 (2013.01); F01N 2570/14 (2013.01); F01N 2610/02 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1411 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1621 (2013.01);
Abstract
The present disclosure describes methods for evaluating NOx conversion efficiency of a close coupled SCR unit of an EAS including the close coupled SCR unit and a downstream SCR unit. The determined NOx conversion efficiency of the close coupled SCR unit is used to diagnose the close coupled SCR unit and or EAS and to control operation parameters of the EAS and/or internal combustion engine operably connected to the EAS.