| abstract |
A catalyst carrier on which a catalyst is supported, and a honeycomb filter made of a columnar honeycomb fired body in which a large number of cells are arranged in parallel in the longitudinal direction across a cell wall and any one end of the cells is sealed. The exhaust gas purification system is configured such that the catalyst carrier is disposed upstream of the honeycomb filter in the exhaust gas channel, and the catalyst carrier is disposed at a predetermined distance from the honeycomb filter, From the outflow side end surface from which the exhaust gas flows out, a catalyst supporting layer is not formed in a region of 10% of the total length of the honeycomb filter, and in the honeycomb filter, from the inflow side end surface from which the exhaust gas flows in, A catalyst support layer is formed in an area of 25 to 90% of the total length of the honeycomb filter among 90% of the total length of the honeycomb filter. Ri, the thermal conductivity of the area in which the catalyst supporting layer of the honeycomb filter is not formed, being higher than the thermal conductivity of the catalyst supporting layer is formed regions. |