ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,149, issued on April 21, was assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit).

"Systems and methods for exhaust gas composition management during stochastic pre-ignition mitigation" was invented by Justin Edward Ketterer (LaSalle, Canada), Ian Alexander May (Rochester Hills, Mich.), Danish Patel (Farmington Hills, Mich.) and Lynn A. Totten (Haslett, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Combustion event data is received from at least one combustion event sensor associated with a plurality of cylinders. Each cylinder includes a combustion chamber, an intake valve, and an exhaust valve. Opening the intake valve allows a flow o...