Patent ID: 8561396
Filing Date: 2013-10-22
Classification: B01D,F01N,Y02T

Abstract:
1. An exhaust gas purification apparatus, comprising a first exhaust gas treatment member supporting at least one of an oxidation catalyst, a three-way catalyst, or a NOx storage reduction catalyst, which is used for purifying exhaust gas from an internal combustion engine; a second exhaust gas treatment member having a hydrocarbon storing function, the second exhaust gas treatment member being disposed on a downstream side of the first exhaust gas treatment member; a connecting passage located between the first exhaust gas treatment member and the second exhaust gas treatment member, wherein said connecting passage causes the exhaust gas entering an upstream side of said connecting passage to move in a same direction into the second exhaust gas treatment member that is different than a direction of the exhaust gas flowing from an upstream side to the downstream side of said first exhaust gas treatment member; and a heat dissipating unit between the first exhaust gas treatment member and the second exhaust gas treatment member, wherein the heat dissipating unit lowers a temperature of the exhaust gas flowing into the second exhaust gas treatment member, wherein an upstream side of the heat dissipating unit is a heat insulating structure, and wherein a further upstream side of the heat dissipating unit a heat retaining structure.