ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,810, issued on July 28, was assigned to Caterpillar Inc. (Peoria, Ill.).

"System and method for adaptive control of ammonia-NOx ratio" was invented by Sylvain J. Charbonnel (Peoria, Ill.) and Oscar J. Gonzalez Villarreal (San Antonio).

According to the abstract* released by the U.S. Patent & Trademark Office: "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...