Patent ID: 8484953

Claim:
An exhaust system that processes exhaust generated by an engine, comprising: a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine; a grid of electrically resistive material that is applied to an exterior upstream surface of the PF and that selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF; a catalyst coating that is applied to the PF and that increases a temperature of the combustion of the particulates within the PF, wherein the catalyst coating is applied with a first thickness in a first sub-section of the PF, the catalyst coating is applied with a second thickness in a second sub-section of the PF, the first thickness is greater than the second thickness; and an electronic circuit that, when an exhaust flow rate is within a desired range, is configured to activate the grid of electrically resistive material for a predetermined period that is less than a regeneration period of the PF.