| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a low-priced and reliable ceramic filter to be used for a long time by preventing generation of a crack to be caused by local combustion of PM (particulate matters) deposited in the filter. <P>SOLUTION: On an exhaust-emission inlet surface (gas inlet surface) of the exhaust gas purification filter, holes (through holes) are made for communication between the inlet surface and the outlet surface so as to let out purified exhaust gas. The area of the through holes on the gas-inlet surface is 1-10% of the gas-inlet surface. <P>COPYRIGHT: (C)2004,JPO</p> |
