Multi-stage regeneration of particulate filter

Details Multi-stage regeneration of particulate filter Multi-stage regeneration of particulate filter

2011-06-28

2011-06-28

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S297000, C060S301000, C060S303000

Reexamination Certificate

active

07966812

ABSTRACT:
A method of regenerating a particulate filter utilizes two temperature levels, with the first, lower, level removing stored hydrocarbons and urea from an SCR catalyst. The second, higher, level then follows for filter regeneration. Because the regeneration occurs after the SCR catalyst has been purged of hydrocarbons and urea, for example, the temperature experienced by the SCR catalyst during regeneration is reduced. In this way, SCR degradation may be reduced.

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