Electrically heated particulate filter with reduced stress
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United States of America Patent
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Mar 5, 2013
Grant Date -
Aug 2, 2012
app pub date -
Dec 14, 2007
filing date -
Aug 14, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system comprises a particulate matter (PM) filter comprising an inlet for receiving exhaust gas. A zoned heater is arranged in the inlet and comprises a resistive heater comprising N zones, where N is an integer greater than one. Each of the N zones comprises M sub-zones, where M is an integer greater than one. A control module selectively activates one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates others of the N zones.
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