Electrically heated particulate filter
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United States of America Patent
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Jan 1, 2013
Grant Date -
Jan 6, 2011
app pub date -
Jul 1, 2009
filing date -
Jul 1, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A control system comprises a particulate matter (PM) filter, an electric heater, a first heating module, and a second heating module. The PM filter includes M zones that filter PM from exhaust gas. The electric heater includes M segments corresponding to the M zones that heat exhaust gas input to selected ones of the M zones when activated. The first heating module activates N of the M segments to heat exhaust gas input to N of the M zones to regenerate the N zones. The second heating module operates in one of a first mode and a second mode to regenerate other ones of the M zones after the N zones are regenerated. The first mode includes adjusting an air-fuel ratio of the exhaust gas. The second mode includes activating other ones of the M segments to heat exhaust gas input to other ones of the M zones.
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