Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2006-07-04
2006-07-04
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S295000, C060S311000
Reexamination Certificate
active
07069721
ABSTRACT:
An exhaust emission control system for an internal combustion engine includes a filter that traps particulate matters and ash and a controller that starts a filter recovery process by controlling a temperature of the filter to a target temperature to bring an inside of the filter into an oxidizing atmosphere such that the particulate matter trapped and accumulated on the filter is removed through oxidization when an estimated amount of the particulate matters trapped and accumulated on the filter exceeds a predetermined amount. The target temperature is set based on the estimated amount of the ash trapped and accumulated on the filter. Even if the amount of the accumulated particulate matter per unit volume is increased owing to accumulation of the ash on the filter, and oxidization reaction speed of the particulate matter may be reduced, thus preventing excessive temperature increase in the filter.
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Denion Thomas
Edwards Loren
Toyota Jidosha & Kabushiki Kaisha
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