Control of the regeneration of a particulate filter
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United States of America Patent
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Feb 18, 2014
Grant Date -
Jun 16, 2011
app pub date -
Apr 10, 2009
filing date -
Aug 8, 2008
priority date (Note) -
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Abstract
A method for inducing the regeneration of a particulate filter associated with an exhaust gas emitting engine while being operated in a vehicle in variable driving conditions. The method includes turning on, for a time period, a heating device in physical contact with the filter subject to the following conditions: i) an average pressure of the exhaust gas at the entrance of the filter is greater than a predetermined value; and ii) an instantaneous pressure of the exhaust gas at the entrance of the filter is at a high improbable value. The time period for such heating device to stay turned on is sufficiently long to reach the particulate ignition temperature and for such instantaneous pressure to get from such high improbable value to a significantly lower value. The average pressure is obtained by averaging a plurality of pressure data sensed at the entrance of the filter.
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