| 摘要 |
The honeycomb filter includes exhaust gas introduction cells each having an open end at an exhaust gas inlet side and a plugged end at an exhaust gas outlet side and exhaust gas emission cells each having an open end at the exhaust gas outlet side and a plugged end at the exhaust gas inlet side, wherein each exhaust gas emission cell is adjacently surrounded fully by the exhaust gas introduction cells across porous cell walls, the exhaust gas introduction cells including first exhaust gas introduction cells and second exhaust gas introduction cells having a larger cross-sectional area than the first exhaust gas introduction cells in a direction perpendicular to the longitudinal direction of the cells, the cross-sectional area of each exhaust gas emission cell is equal to or larger than that of each second exhaust gas introduction cell, the exhaust gas introduction cell and the exhaust gas emission cell are all polygonal, and a side facing the exhaust gas emission cell among the sides forming the cross-sectional shape of each first exhaust gas introduction cell is longer than a side facing the exhaust gas emission cell among sides forming the cross-sectional shape of each second exhaust gas introduction cell. |
