FILTER FOR PURIFYING EXHAUST GAS

摘要

PURPOSE:To enhance the function of a honeycomb filter to capture particulates in exhaust gas and to reduce pressure drop by nearly uniformly forming heat resistant ceramic layers chiefly on the insides of the pores in the side wall of each cell of the filter. CONSTITUTION:Heat resistant ceramic layers 4A are nearly uniformly formed chiefly on the insides of the pores 3 in the side wall 2 of each cell of a honeycomb filter 1. The function of the filter 1 to capture particles in exhaust gas is enhanced and pressure drop is reduced. The filter 1 has a large catalyst supporting area and can effectively purity exhaust gas.