ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,797, issued on Oct. 21, was assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit).

"Ambient humidity virtual sensor" was invented by Min Sun (Troy, Mich.), David Eugene Edwards (Rochester Hills, Mich.), Cameron Paul Smith (Milford, Mich.) and Rupesh Sonu Kakade (West Bloomfield, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of operating a cooling system of a vehicle includes measuring a refrigerant pressure and a refrigerant temperature of a flow of refrigerant in a refrigerant circuit of the cooling system, estimating a relative humidity of a supply airflow across an evaporator of the refrigerant circuit utilizing the measured r...