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Variable power distribution for zoned regeneration of an electrically heated particulate filter

United States Patent

8,146,350
April 3, 2012
View the Complete Patent at the US Patent & Trademark Office
A system includes a particulate matter (PM) filter with multiple zones, an electric heater and a control module. The electrical heater includes heater segments, which each correspond with a respective one of the zones. The electrical heater is arranged upstream from and is proximate with the PM filter. The control module selectively applies a first energy level to a first one of the zones via a first one of the heater segments to initiate regeneration in the first zone. The control module also selectively applies a second energy level that is less than the first energy level to a second one of the zones via a second one of the heater segments to initiate regeneration in the second zone.
Bhatia; Garima (Bangalore, IN), Gonze; Eugene V. (Pinckney, MI), Paratore, Jr.; Michael J. (Howell, MI)
GM Global Technology Operations LLC (
12/ 146,827
June 26, 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.