| 摘要 |
Provided is a porous honeycomb filter having a plurality of inlet side flow paths having openings on the inlet side end surface and having sealed parts on the outlet side end surface and a plurality of output side flow paths having openings on the outlet side end surface and having sealed parts on the inlet side end surface. Letting V be the gas flow velocity, in each position on the surface of the inside walls of the inlet side flow paths, in a direction perpendicular to the surface when gas is supplied to the plurality of inlet side flow paths from the inlet side end surface, VAV be the average value for V, VV10 be the value for V/VAV at a position where the cumulative frequency is 10% when V/VAV distribution is arranged in ascending order, and VV90 be the value for V/VAV at a position where cumulative frequency is 90% when the distribution of V/VAV is arranged in ascending order, Equation (1) is satisfied. VV90 − VV10 ≥ 0.4 ... (1) |
