Overlap zoned electrically heated particulate filter

Details Overlap zoned electrically heated particulate filter Overlap zoned electrically heated particulate filter

2011-07-19

2011-07-19

Griffin, Walter D (Department: 1774)

Gas separation: processes

Filtering

With heating of filter

C055S522000, C055S523000, C055S524000, C422S169000, C422S170000, C422S171000, C422S172000, C422S177000, C422S178000, C422S179000, C422S180000, C422S181000, C422S182000

Reexamination Certificate

active

07981198

ABSTRACT:
A system includes a particulate matter (PM) filter that includes an upstream end for receiving exhaust gas and a downstream end. A zoned heater is arranged spaced from the upstream end and comprises N zones, where N is an integer greater than one, wherein each of the N zones comprises M sub-zones, where M is an integer greater than or equal to one, and wherein the N zones and the M sub-zones are arranged in P layers, where P is an integer greater than one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones.

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