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Low exhaust temperature electrically heated particulate matter filter system

United States Patent

February 14, 2012
View the Complete Patent at the US Patent & Trademark Office
A system includes a particulate matter (PM) filter, a sensor, a heating element, and a control module. The PM filter includes with an upstream end that receives exhaust gas, a downstream end and multiple zones. The sensor detects a temperature of the exhaust gas. The control module controls current to the heating element to convection heat one of the zones and initiate a regeneration process. The control module selectively increases current to the heating element relative to a reference regeneration current level when the temperature is less than a predetermined temperature.
Gonze; Eugene V. (Pinckney, MI), Paratore, Jr.; Michael J. (Howell, MI), Bhatia; Garima (Bangalore, IN)
GM Global Technology Operations LLC (Detroit, MI)
12/ 174,069
July 16, 2008
STATEMENT OF GOVERNMENT RIGHTS The 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.