| 摘要 |
<p>The present invention provides a honeycomb filter being compact in spite of being used for high emission vehicles, maintaining a high PM capturing efficiency to satisfy severe emission regulations, and reducing the pressure loss. The honeycomb filter of the present invention includes porous cell walls and exhaust gas emission cells each having an plugged end, wherein the honeycomb filter has a ratio of the length to the diameter (length/diameter) of less than 1.0; the exhaust gas introduction cells include first exhaust gas introduction cells and second exhaust gas introduction cells each having a larger cross sectional area than each first exhaust gas introduction cell in a direction perpendicular to the longitudinal direction of the cells; each exhaust gas emission cell has an equal or larger cross sectional area than each second exhaust gas introduction cell in a direction perpendicular to the longitudinal direction of the cells; and the total volume of the exhaust gas introduction cells is larger than the total volume of the exhaust gas emission cells.</p> |
