CONTROL OF PASSIVE SOOT OXIDATION
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United States of America Patent
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Issued Date -
Jan 22, 2015
app pub date -
Jul 18, 2013
filing date -
Jul 18, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method for controlling passive soot oxidation in a diesel particulate filter that includes sensing the temperature of exhaust gases upstream and downstream of the diesel particulate filter. The sensed temperatures are used by a control unit to predict whether the temperature of the exhaust gas within the diesel particulate is within a predetermined temperature range for passive oxidation of soot in the diesel particulate filter. If the temperatures are below passive oxidation temperatures, an auxiliary component is activated that increases the temperature of exhaust gas delivered to the diesel particulate filter. When the exhaust gas temperature within the DPF is predicted to be within passive oxidation levels but below active regeneration temperatures, the auxiliary component is deactivated.
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