| 摘要 |
<p>PURPOSE:To burn and regenerate an exhaust gas filter in uniform temp. distribution by making the inner diameter of an inlet side of exhaust gas larger than the inner diameter of an outlet side thereof and making the passage of exhaust gas a tapered shape in the respective cells of a honeycomb structural form. CONSTITUTION:An exhaust gas filter 1 is constituted by alternately providing closed parts 4, 5 in the end parts of the cells of a honeycomb structural form formed with plural cells 2 by porous ceramic. Further the inner diameter of an inlet side of exhaust gas is made larger than the inner diameter of an outlet side thereof and passages 6, 7 of exhaust gas are made to a tapered shape. Therefore in case of collecting soot 8 incorporated in exhaust gas of a diesel engine, the areas of the cell walls 3 of the downstream side are decreased and the amount of soot to be deposited is decreased. As a result, at a time for burning and regenerating the exhaust gas filter 1, the quantity of heat generated by the combustion of soot in the downstream side is made little and thereby the excessive temp. elevation in the downstream side can be prevented.</p> |
