DIESEL PARTICULATE FILTER FOR VEHICLE WITH IMPROVED EXHAUST GAS PURIFICATION EFFICIENCY BY SECURING CONTACT REACTION CONDITION BETWEEN EXHAUST GAS AND FILTER

摘要

PURPOSE: A DPF(Diesel Particulate Filter) for a vehicle is provided to equalize the inlet velocity distribution of the exhaust gas of an engine by positioning a unit cell with large cell density and small porosity in the center and a unit cell with small cell density and large porosity toward the radial direction in order. CONSTITUTION: In a DPF(10) for a vehicle having a plurality of lattice-shaped cell structures, the cell density of the cell structure divided in the DPF gradually gets smaller from the center to the radial direction and the porosity gets larger gradually. The cell density and porosity of an A area of one cell structure formed in the center of the DPF is 300 and 52%, respectively. The cell density and porosity of a B area of the cell structure composed of at least unit cells(11) is 200 and 52%, respectively. The cell density and porosity of a C area of the cell structure formed in the radial direction of the B area is 100 and 60%, respectively.