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Face crack reduction strategy for particulate filters

United States Patent

8,105,417
January 31, 2012
View the Complete Patent at the US Patent & Trademark Office
A system comprises a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion. A control module initiates combustion of PM in the PM filter using a heater and selectively adjusts oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter. A method comprises providing a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion; initiating combustion of PM in the PM filter using a heater; selectively adjusting oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter.
Gonze; Eugene V. (Pinckney, MI), Paratore, Jr.; Michael J. (Howell, MI), Bhatia; Garima (Bangalore, IN)
GM Global Technology Operations LLC (
12/ 019,980
January 25, 2008
STATEMENT OF GOVERNMENT RIGHTS This disclosure was produced pursuant to U.S. Government Contract No. DE-FC-04-03 AL67635 with the Department of Energy (DoE). The U.S. Government has certain rights in this disclosure.