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:
Aug. 15, 2023
Filed:
Feb. 07, 2022
Caterpillar Inc., Peoria, IL (US);
Joshua L. Ratts, East Peoria, IL (US);
Hrishi Lalit Shah, Dunlap, IL (US);
Tyler V. Richards, Parker, CO (US);
Matthew Colin Mowers, Peoria, IL (US);
Sowmya Nagesh, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An aftertreatment system for a diesel engine may include a diesel particulate filter configured for placement in fluid communication with the diesel engine to receive an exhaust flow. The system may also include a selective catalytic reduction system configured for arrangement downstream of the diesel particulate filter and a NOsensor configured to measure a NOconcentration in the exhaust flow entering the selective catalytic reduction system. The system may also include a controller configured to estimate a ratio of NOto NOdownstream of the diesel particulate filter and based on a factor affecting the generation of NOupstream of the selective catalytic reduction system. The controller may also be configured to adjust the measured NOconcentration based on the ratio to provide an estimated actual NOconcentration and dose diesel exhaust fuel into the exhaust flow based on the estimated actual NOconcentration.