Gas separation: processes – Filtering – With cleaning of filter
Reexamination Certificate
2007-12-19
2011-11-15
Smith, Duane (Department: 1776)
Gas separation: processes
Filtering
With cleaning of filter
C055S282300, C055S523000, C055SDIG010, C055SDIG030, C095S283000
Reexamination Certificate
active
08057581
ABSTRACT:
A system comprises a particulate matter (PM) filter that comprises 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 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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Gonze Eugene V.
Paratore, Jr. Michael J.
GM Global Technology Operations LLC
Orlando Amber
Smith Duane
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