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Diesel particulate filter (DPF) regeneration by electrical heating of resistive coatings

United States Patent

December 30, 2008
View the Complete Patent at the US Patent & Trademark Office
An exhaust system that processes exhaust generated by an engine includes a diesel particulate filter (DPF) that is disposed downstream of the engine and that filters particulates from the exhaust. An electrical heater is integrally formed in an upstream end of the DPF and selectively heats the exhaust to initiate combustion of the particulates within the exhaust as it passes therethrough. Heat generated by combustion of the particulates induces combustion of particulates within the DPF.
Williamson; Weldon S. (Malibu, CA), Gonze; Eugene V. (Pinckney, MI)
GM Global Technology Operations, Inc. (Detroit, MI)
11/ 233,450
September 22, 2005
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. STATEMENT OF GOVERNMENT SUPPORT The Government of the United States of America has rights in this DE-FC-04-03AL67635 award by the U.S. Department of Energy.