Patent ID: 6454318
Filing Date: 2002-09-24
Classification: F01N

Abstract:
A connection portion of an exhaust pipe, where the connection portion is connectable to an exhaust port side of an engine, the connection portion comprising:an end portion of an exhaust pipe connectable to the exhaust port side of the engine, said end portion of the exhaust pipe having an outer surface and an inner surface; an extension portion extending radially outwardly and integrally formed on an edge of the end portion of the exhaust pipe, said extension portion having an inner end surface and an outer end surface; and a collar fixed to the outer surface of the end portion of said exhaust pipe, said collar having a collar inner surface, an end portion with an edge, and a collar outer surface, wherein the edge of the end portion of said collar is abutted against the inner surface of said extension portion, and at least one of said inner surface and said outer surface of said end portion being integrally secured and crimped together with at least one of said collar inner surface or said collar outer surface.