Patent ID: 7886529
Filing Date: 2011-02-15
Classification: F01N,F02D,Y02T

Abstract:
1. An exhaust system comprising: a canister that is disposed downstream from an engine; a particulate filter (PF) that is disposed within said canister and that filters particulates within an exhaust from said engine; a reducing catalyst that is disposed on said PF and that promotes reaction of a liquid reductant in said exhaust after reception by said PF; a heating element that comprises N zones, that is disposed within said canister and that heats particulate matter in said PF, where N is an integer greater than 1; and a control module adjusts current to said heating element to heat a first one of said N zones and initiate regeneration of a first portion of said PF corresponding to said first one of said N zones, wherein said control module prevents heating of a second one of said N zones by said heating element while heating said first one of said N zones, wherein a second portion of said PF corresponding to said second one of said N zones reduces nitrogen oxide in the exhaust while said first portion is regenerated.