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. 15, 2024
Filed:
Apr. 18, 2023
Applicant:
Paccar Inc, Bellevue, WA (US);
Inventors:
Cynthia Chaffin Webb, Sedro-Woolley, WA (US);
Charles Wayne Reinhardt Swart, Bellingham, WA (US);
Assignee:
PACCAR Inc, Bellevue, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); B01D 53/94 (2006.01); F01N 3/28 (2006.01); F01N 13/00 (2010.01);
U.S. Cl.
CPC ...
F01N 3/208 (2013.01); B01D 53/9431 (2013.01); B01D 53/9495 (2013.01); F01N 3/28 (2013.01); F01N 3/2066 (2013.01); F01N 13/009 (2014.06); F01N 13/0093 (2014.06); F01N 2570/14 (2013.01); F01N 2590/08 (2013.01); F01N 2610/02 (2013.01); F01N 2610/146 (2013.01); F01N 2900/0422 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1602 (2013.01);
Abstract
A heavy duty truck includes a diesel engine that generates an exhaust gas flow and an exhaust after-treatment system for treatment of the exhaust gas flow. The exhaust after-treatment system includes at least one temperature sensor at an underbody SCR system within the exhaust after-treatment system and a DEF injector upstream of a close-coupled SCR system within the exhaust after-treatment system. The DEF injector is operated to inject DEF into the exhaust gas flow at a rate that varies as a function of a temperature measured by the temperature sensor.