Isolierung für eine Komponente einer Abgasanlage

摘要

An insulator disposed in opposition to an exhaust manifold of an internal combustion engine with spacing therebetween is constituted as follows. A metal base having heat resistance is provided, a surface covering layer obtained by surface treatment is not provided on a first region of an outer surface of the base, the outer surface being on the side that is not in opposition to the exhaust manifold, and a surface covering layer obtained by the surface treatment is provided on a second region. The first region of the outer surface of the base is a region in opposition to peripheral components disposed in the vicinity of the outer surface of the base. In this case, the material of the base is aluminum or an aluminum alloy, and the surface treatment performed on the outer surface of the base is black alumite treatment.