Method for regenerating particulate filter

Details Method for regenerating particulate filter Method for regenerating particulate filter

2011-08-30

2011-08-30

Tran, Binh Q (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S286000, C060S303000

Reexamination Certificate

active

08006486

ABSTRACT:
A method for forced regeneration of a catalytic regenerative particulate filter is disclosed. An oxidation catalyst is arranged in front of the particulate filter incorporated in the exhaust pipe. When the exhaust temperature measured between the oxidation catalyst and the filter is lower than a first preset temperature and is equal or more than a second preset temperature lower than the first preset temperature, post injection is added at non-ignition timing following the main injection of the fuel near the compression upper dead center to conduct fuel addition. When the exhaust temperature exceeds the first preset temperature, the post injection is stopped and fuel is directly injected into the exhaust pipe upstream of the oxidation catalyst to conduct the fuel addition. Thus, the particulate filter can be regenerated more efficiently and in shorter time.

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