Ceramic honeycomb filter and exhaust gas-cleaning method

Details Ceramic honeycomb filter and exhaust gas-cleaning method Ceramic honeycomb filter and exhaust gas-cleaning method

2006-09-19

2006-09-19

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...

C060S297000, C060S303000, C060S311000, C055S282300, C055S524000, C055SDIG030, C422S177000

Reexamination Certificate

active

07107763

ABSTRACT:
A ceramic honeycomb filter comprising a ceramic honeycomb structure having porous partition walls defining a plurality of flow paths, and plugs disposed inside the flow paths such that an exhaust gas passes through pores of the porous partition walls, thereby removing particulates from the exhaust gas; a catalyst being carried at least partially on the partition walls and/or the plugs; and at least one of plugs on the side of exhaust gas inlets being disposed at a position separate from the inlet-side opening ends of the flow paths. Particulates are removed from the exhaust gas by injecting unburned fuel and/or hydrocarbon in a gaseous state upstream of the inlet-side plugs to maintain at least part of the inlet-side plugs and their downstream regions at a temperature substantially equal to or higher than the lowest activation temperature of the catalyst.

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