Patent ID: 8137428
Filing Date: 2012-03-20
Classification: F01N,Y10S

Abstract:
1. An exhaust gas control apparatus for an engine, comprising: a housing that has an internal space; a purification structural body that is arranged in the housing and that purifies exhaust gas; and a holding member that is arranged, in a compressed state, between the purification structural body and the housing, wherein the purification structural body includes a main body that has an exhaust passage through which the exhaust gas flows and an assisting body that is provided on an outer peripheral face of the main body, the purification structural body is arranged in the housing such that the holding member and the assisting body are engaged with each other when the purification structural body moves in a downstream direction with respect to the housing, and an amount of a clearance left between the assisting body and the holding member is set such that, when the purification structural body moves with respect to the housing in the downstream direction, the assisting body comes into contact with the holding member before the purification structural body comes into contact with the housing.