Patent ID: 7877987
Filing Date: 2011-02-01
Classification: F01N,F02B,F02D

Abstract:
1. 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; and a hydrocarbon adsorbent coating applied to the PF that releases hydrocarbons into the exhaust to increase a temperature of the combustion of the particulates within the PF, wherein the hydrocarbon adsorbent coating is applied at a first and second densities in a first and second sub-sections of the PF, respectively, and wherein the first density is greater than the second density.