Exhaust gas purification filter
AssigneeDenso Corporation
InventorMikio Ishihara
Life of this patent
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Abstract
An exhaust gas purification filter comprises: a casing; a porous dividing wall which partitions the inside of the casing into a honeycomb shape; and cells enclosed by the dividing wall. A pore path length distribution of the dividing wall, when expressed by a frequency histogram per 10 μm of the pore path length of the dividing wall, has an integrated frequency of at least 58%. The integrated frequency is a maximum value of a value obtained by summing the frequencies of a total of three adjacent levels which include the maximum peak frequency. The dividing wall preferably has a gas permeability coefficient k of at least 0.8×10−12 m2.
Claims3
An exhaust gas purification filter comprising:
- a casing;
- a porous dividing wall which partitions the inside of the casing into a honeycomb shape;
- and cells enclosed by the dividing wall;
- wherein
- a pore path length distribution of the dividing wall, when expressed by a frequency histogram per 10 μm of the pore path length of the dividing wall, has an integrated frequency of at least 58%, the integrated frequency being a maximum value of a value obtained by summing the frequencies of a total of three adjacent levels which include the maximum peak frequency.
Dependencies are inferred from the claim text.