Patent ID: 7959868
Filing Date: 2011-06-14
Classification: B01D,F01N,F02B,Y02T

Abstract:
1. An exhaust gas purifying apparatus comprising a semi-filter-structured body comprising a plurality of exhaust gas passages, and a filter body provided in the exhaust gas passages, wherein: the exhaust gas passages comprise a filter-conducting portion, which conducts an exhaust gas to the filter body, and a filter-bypassing portion, which bypasses the filter-conducting portion by branching out to an exhaust gas passage adjacent to the filter-conducting portion; a most upstream filter-bypassing portion is provided more upstream than a most upstream filter-conducting portion, and the exhaust gas passage of the most upstream filter-bypassing portion is open at an exhaust gas inlet side of the semi-filter-structured body; the semi-filter-structured body is defined by a thin metal corrugate plate having hill portions and valley portions alternately neighboring each other in a direction crossing an exhaust gas flow direction and a gas transmittable plain plate comprising the filter body, the corrugate plate and the plain plate being alternately stacked; a wall-flow-structured filter catalyst comprising an inlet-side cell clogged on a downstream part thereof; an outlet-side cell neighboring the inlet-side cell and clogged on an upstream part thereof; a cell wall demarcating the inlet-side cell and the outlet-side cell and having a number of pores; a catalyst layer formed on a surface of the cell wall and an inner face of the pores and comprising a catalyst metal and an oxide support; and the wall-flow-structured filter catalyst is disposed more downstream than the semi-filter-structured body.