Exhaust filter element and exhaust gas-treating apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasaaki Yonemura, Takao Kusuda
Life of this patent
Estimating the term…
Abstract
This exhaust filter element has a corrugated honeycomb structure made of the porous fibrous ceramics, of which cells are alternately plugged; and is made of material having a higher dielectric factor at an inflow side or an outer circumference portion than at an inside portion. The filter element can be regenerated by irradiation of micro wave after it is soiled by particulates in an exhausted gas.
Claims15
An exhaust filter element having a ceramic honeycomb structure with layers of elongated cells, the layers extending from an outer portion to an inner portion and the cells extending from an inlet end to an outlet end, adjacent cell ends of the honeycomb structure in alternate layers having plugs therein formed of a plug material, said honeycomb structure being made of a material having a higher dielectric constant at at least a portion of the outer portion than at the inner portion, and the higher dielectric constant being sufficient to cause generation of heat in said honeycomb structure material when irradiated with microwaves.
An exhaust filter element having a ceramic honeycomb structure with layers of elongated cells, the layers extending from an outer portion to an inner portion and the cells extending from an inlet end to an outlet end, adjacent cell ends of the honeycomb structure in alternate layers having plugs therein formed of a plug material, said honeycomb structure having several layers from the outer portion inwardly of the honeycomb structure made of a material having a higher dielectric constant than the layers in the inner portion, and the higher dielectric constant being sufficient to cause generation of heat in said honeycomb structure material when irradiated with microwaves;
- and means for irradiating the exhaust filter element with microwaves.
An exhaust filter element having a ceramic honeycomb structure with layers of elongated cells, the layer extending from the inner portion of said honeycomb structure to an outer portion of said honeycomb structure and the cells extending from an inlet end to an outlet end, adjacent cell ends of the honeycomb structure in alternate layers having plugs therein formed of a plug material, said honeycomb structure being made of a material having a higher dielectric constant at at least a portion of the length of said honeycomb structure at the inlet end than the dielectric constant of the material of the honeycomb structure at the outlet end, and the higher dielectric constant being sufficient to cause generation of heat in said honeycomb structure material when irradiated with microwaves.
Dependencies are inferred from the claim text.