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:
Jul. 28, 2026
Filed:
Dec. 16, 2024
Caterpillar Inc., Peoria, IL (US);
Sylvain J. Charbonnel, Peoria, IL (US);
Oscar J. Gonzalez Villarreal, San Antonio, TX (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An ammonia to NOx ratio (ANR) control system includes an internal combustion engine configured to combust fuel, a valve configured to provide the fuel to the internal combustion engine, and a selective catalytic reduction (SCR) catalyst connected to the internal combustion engine to receive exhaust generated by combustion of the fuel with the internal combustion engine. The system also includes a reductant injector configured to inject reductant for the SCR catalyst, a sensor connected downstream of the SCR catalyst, and a controller. The controller may be configured to: receive NOx level signals or NHlevel signals from the sensor, generate commands for controlling the reductant injector, and determine, with a perturbation-based control algorithm and based on the NOx or NHlevel signals, commands for controlling the reductant injector.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile