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Title: High exhaust temperature, zoned, electrically-heated particulate matter filter

A system includes a particulate matter (PM) filter, an electric heater, and a control circuit. The electric heater includes multiple zones, which each correspond to longitudinal zones along a length of the PM filter. A first zone includes multiple discontinuous sub-zones. The control circuit determines whether regeneration is needed based on an estimated level of loading of the PM filter and an exhaust flow rate. In response to a determination that regeneration is needed, the control circuit: controls an operating parameter of an engine to increase an exhaust temperature to a first temperature during a first period; after the first period, activates the first zone; deactivates the first zone in response to a minimum filter face temperature being reached; subsequent to deactivating the first zone, activates a second zone; and deactivates the second zone in response to the minimum filter face temperature being reached.
Authors:
; ;
Publication Date:
OSTI Identifier:
1221378
Report Number(s):
9,140,159
11/950,545
DOE Contract Number:
FC04-03AL67635
Resource Type:
Patent
Resource Relation:
Patent File Date: 2007 Dec 05
Research Org:
Albuquerque Operations Office, Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING