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:
Oct. 18, 2022
Filed:
Oct. 21, 2021
Applicant:
Paccar Inc, Bellevue, WA (US);
Inventors:
Cynthia Chaffin Webb, Sedro-Woolley, WA (US);
Charles Wayne Reinhardt Swart, Bellingham, WA (US);
Maarten Meijer, Anacortes, WA (US);
Varun Ramesh, Bellingham, WA (US);
Assignee:
PACCAR INC, Bellevue, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 3/20 (2006.01); F01N 3/035 (2006.01); F01N 3/029 (2006.01);
U.S. Cl.
CPC ...
F01N 3/2066 (2013.01); F01N 3/0293 (2013.01); F01N 3/035 (2013.01); F01N 3/2006 (2013.01); F01N 2250/02 (2013.01); F01N 2260/04 (2013.01); F01N 2570/14 (2013.01); F01N 2610/03 (2013.01); F01N 2610/1453 (2013.01);
Abstract
The present disclosure describes methods for operating an EAS including a close coupled SCR unit, a downstream SCR unit, a diesel oxidation catalyst unit (DOC) and a diesel particulate filter (DPF). The methods utilize the close coupled SCR unit to manage NOx emissions from the EAS during regeneration of a diesel particulate filter (DPF).