US Patent Issued to VOLVO TRUCK on April 29 for "Urea crystal detection by monitoring a ratio between a NOx sensor signal and a equivalence ratio" (Swedish Inventor)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,911, issued on April 29, was assigned to VOLVO TRUCK Corp. (Gothenburg, Sweden).

"Urea crystal detection by monitoring a ratio between a NOx sensor signal and a equivalence ratio" was invented by Jacob Raul Moreno Cruz (Herrljunga, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A computer-implemented method for detecting and reducing the amount of urea crystals in an exhaust aftertreatment system including at least one NOx sensor upstream of a urea injector is provided, The method includes: acquiring measurement values from the NOx-sensor; determining lambda values associated with the measurement values, wherein a lambda value being indicative...