Patent ID: 7306772

Claim:
An exhaust gas purification apparatus for an engine, comprising: a casing that forms a part of an exhaust gas passage of the engine; a substrate, disposed in the casing, that carries a substance to purify exhaust gas; and a supporting mat for supporting the substrate in the casing, the supporting mat being located between the substrate and the casing and having a depression to trap foreign matters, the depression being formed at an upstream-side end face of the supporting mat, wherein the substrate is disposed such that an axis of the substrate is not perpendicular to a vertical direction so that an upstream-side end face of the substrate is inclined relative to a plane perpendicular to the vertical direction, wherein the depression of the supporting mat is located adjacent to a lower-most position of the upstream-side end face of the substrate in a condition where the exhaust gas purifying apparatus is installed to the engine.