Patent ID: 7900443
Filing Date: 2011-03-08
Classification: F01N,Y02T

Abstract:
1. An exhaust gas filtering method for an internal combustion engine, the method comprising: (a) positioning a particle filter arrangement along the exhaust gas flow, the particle arrangement comprising: wherein the distributing and deflecting element comprises ducts operable to simultaneously conduct exhaust gases in multiple flow directions, wherein the first, second, and third segments are substantially concentric, the first segment is nested within the second segment, and the second segment is nested within the third segment; (b) receiving the exhaust gases at the inlet of a particle filter arrangement; (c) conducting exhaust gas flow passing from the inlet into the distributing and deflecting element, wherein the distributing and deflecting element distributes the inlet gas flow to the first segment, and wherein the flow direction of the exhaust gases in the first segment is substantially in the direction of the outlet; (d) conducting the exhaust gas flow passing from the first segment into the second segment, wherein the flow direction of the exhaust gases in the second segment is substantially in the direction of the inlet; and (e) conducting the exhaust gas flow passing from the second segment into the distributing and deflecting element, wherein the distributing and deflecting element deflects the second segment gas flow into the third segment, and wherein the flow direction of the exhaust gases in the third segment is substantially in the direction of the outlet.