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:
Apr. 21, 2026
Filed:
Sep. 03, 2024
Systems and methods for exhaust gas composition management during stochastic pre-ignition mitigation
GM Global Technology Operations Llc, Detroit, MI (US);
Justin Edward Ketterer, LaSalle, CA;
Ian Alexander May, Rochester Hills, MI (US);
Danish Patel, Farmington Hills, MI (US);
Lynn A. Totten, Haslett, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
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 of air from an intake manifold into the combustion chamber. Opening the exhaust valve allows a flow of air from the combustion chamber to an exhaust manifold. When a determination is made that an SPI event has occurred in at least one of the cylinders based on the combustion event data, a command is issued to a variable valve timing (VVT) system to implement a valve timing overlap for each of the plurality of cylinders, wherein the intake valve and the exhaust valve of the cylinder are simultaneously placed in the open positions during the valve timing overlap.