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. 12, 2021
Filed:
Dec. 17, 2019
Caterpillar Inc., Peoria, IL (US);
Paul R. Moore, Dunlap, IL (US);
Ling Deng, San Antonio, TX (US);
Wilce Damion Williams, San Antonio, TX (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A system for the treatment of exhaust gases from an internal combustion engine with a combustion chamber includes an upstream DEF injector disposed to introduce DEF to the combustion chamber and a close-coupled SCR catalyst downstream of and in close-coupled relation to the internal combustion engine. Downstream of the close-coupled SCR catalyst may be a primary SCR catalyst and a primary DEF injector. The system may operate to reduce NOin the close-coupled SCR catalyst during low-load conditions of the internal combustion engine and reduce NOin the primary SCR catalyst during loaded conditions.