High exhaust temperature, zoned, electrically-heated particulate matter filter
Patent
·
OSTI ID:1221378
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.
- Research Organization:
- Albuquerque Operations Office, Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC04-03AL67635
- Assignee:
- Gonze, Eugene V. (Pinckney, MI)
- Patent Number(s):
- 9,140,159
- Application Number:
- 11/950,545
- OSTI ID:
- 1221378
- Country of Publication:
- United States
- Language:
- English
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