Patent ID: 8112990
Filing Date: 2012-02-14
Classification: F01N,Y02T

Abstract:
1. A system comprising: a particulate matter (PM) filter comprises an upstream end that receives exhaust gas, a downstream end and a plurality of zones; a sensor that detects a temperature of said exhaust gas; a heating element; and a control module that controls current to said heating element to convection heat one of said plurality of zones and initiate a regeneration process, wherein said control module selectively increases current to said heating element relative to a reference regeneration current level when said temperature is less than a predetermined temperature, wherein said control module increases said current to said heating element to increase a temperature of a portion of said upstream end to a regeneration temperature level, wherein said regeneration temperature level supports combustion propagation along said PM filter from said upstream end to said downstream end, wherein said regeneration temperature level is greater than a maximum operating temperature of said PM filter, and wherein said maximum operating temperature is greater than or equal to an average overall temperature across said PM filter at which degradation of said PM filter begins.