Exhaust gas purification filter
AssigneeDenso Corporation
InventorHiroaki KAYAMA
Life of this patent
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Abstract
An exhaust gas purification filter includes a plurality of cells extending in a filter axial direction, a porous partition separating and defining the plurality of cells, and a sealing section sealing the plurality of cells alternately at both filter ends. The partition has a void volume of a reduced dale, Vvv, and a material volume of a reduced peak, Vmp, as volume parameters determined in noncontact surface roughness measurement on a surface of the partition, with their total value being more than 1.3 μm3/μm2 and 1.7 μm3/μm2 or less. The partition has a mean pore size of 12 μm or more and 20 μm or less. The partition also has a porosity of 50% or more and 75% or less.
Claims3
An exhaust gas purification filter comprising:
- a plurality of cells extending in a filter axial direction;
- a porous partition separating and defining the plurality of cells;
- and
- a sealing section sealing the plurality of cells alternately at both filter ends,
- wherein the partition has a void volume of a reduced dale, Vvv, and a material volume of a reduced peak, Vmp, being volume parameters determined in noncontact surface roughness measurement on a surface of the partition, with a total value of the volume Vvv and the volume Vmp being more than 1.3 μm3/μm2 and 1.7 μm3/μm2 or less;
- the partition has a mean pore size of 12 μm or more and 20 μm or less;
- and
- the partition has a porosity of 50% or more and 75% or less.
Dependencies are inferred from the claim text.