Patent ID: 6460520
Filing Date: 2002-10-08
Classification: F02M,F28D,F28F

Abstract:
An exhaust gas re-circulation cooler comprising a component for transferring gases between an outlet port and an inlet port of an internal combustion engine said component comprising a substantially tubular outer member having a first end and a second end and an outer tubular wall extending between said first and second ends, said component further comprising at least one substantially tubular inner member housed in said first substantially tubular outer member, said component comprising:said outer tubular wall having at least one corrugated portion; and at least one of said at least one substantially tubular inner member having helical corrugations throughout at least one portion of said at least one substantially tubular inner member enabling turbulent gas flow through said at least one substantially tubular inner member; wherein both said substantially tubular outer member and at least one of said at least one substantially tubular inner member each have at least one bend portion; and said corrugated portion on said substantially tubular outer member providing flexibility of the exhaust gas re-circulation cooler to accommodate thermal expansion and engine vibration.