Patent ID: 6875407
Filing Date: 2005-04-05
Classification: B01D,F28D

Abstract:
1. A thermally-activated exhaust treatment device adapted to control exhaust emissions in a vehicle, comprising: an inner housing having a first inlet and a first outlet defining a longitudinal direction and having an exhaust treatment device therein chosen to reduce emissions from exhaust of a combustion engine as the exhaust passes from the first inlet to the first outlet; an outer housing enclosing the inner housing but characteristically not contacting the inner housing, the outer housing including a second inlet and a second outlet that align with the first inlet and the first outlet of the inner housing, the inner and outer housings including walls forming a sealed insulation cavity around the inner housing, the insulation cavity having a vacuum drawn therein; and an intermediate housing positioned adjacent to the inner housing that includes metal phase change material comprising an alloy including Zinc (Zn), Magnesium (Mg), and Aluminum (Al), wherein the metal phase change material includes by weight about 35% to 55% Zn by weight, about 35-55% Mg by weight, about 2%-20% Al by weight, and about 0-15% Si by weight.