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Electrically heated DPF start-up strategy

United States Patent

April 10, 2012
View the Complete Patent at the US Patent & Trademark Office
An exhaust system that processes exhaust generated by an engine has a diesel particulate filter (DPF) that is disposed downstream of the engine and that filters particulates in the exhaust. An electrical heater is disposed upstream of the DPF and selectively heats the exhaust to initiate combustion of the particulates. Heat generated by combustion of particulates in the heater induces combustion of particulates within the DPF. A control module selectively enables current flow to the electrical heater for an initial period of a DPF regeneration cycle, and limits exhaust flow while the electrical heater is heating to a predetermined soot combustion temperature.
Gonze; Eugene V. (Pinckney, MI), Paratore, Jr.; Michael J. (Howell, MI), Ament; Frank (Troy, MI)
GM Global Technology Operations LLC (
11/ 890,766
August 7, 2007
STATEMENT OF GOVERNMENT RIGHTS This invention 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 invention.