Patent ID: 7159390
Filing Date: 2007-01-09
Classification: B01D,F01N

Abstract:
1. An exhaust gas cleaner for an internal combustion engine comprising: a particulate filter, provided midway in an exhaust pipe of the internal combustion engine, for collecting particles in exhaust gas; and a particulate-filter regenerating means for regenerating the particulate filter by burning and removing collected particles at a suitable time; wherein a heat-absorbing area having a heat capacity larger than that of the other portions is provided on an end of an exhaust gas flowing-out side of the particulate filter to absorb and dissipate combustion heat generated from particle combustion, wherein the particulate filter is of a wall flow type and has a monolithic structure having a number of cells sectioned by porous walls; wherein the cells are alternately clogged at an exhaust gas flowing-in side end or the exhaust gas flowing-out side end of the cells, wherein the heat-absorbing area is formed by a deeply clogged structure in which a depth of the clogged sections at the exhaust gas flowing-out side end of the monolithic structure is deeper than that of the clogged sections at the exhaust gas flowing-in side end, wherein on the exhaust gas flowing-out side end, the deeply clogged structure is formed so that deeply clogged sections and normally clogged sections are substantially uniformly arranged.