| 摘要 |
PROBLEM TO BE SOLVED: To suppress corrosion of an EGR pipe and to perform efficient heat exchange between an EGR gas and a refrigerant.SOLUTION: An EGR gas cooling device includes: an EGR pipe in which an EGR gas circulates; a refrigerant path provided in an outer circumference of the EGR pipe; a plurality of heat exchange bodies which are parallely disposed along a flow direction of the EGR gas in the EGR pipe and which make the EGR gas pass therethrough; and a covering member covering the internal circumferential wall surface of the EGR pipe. Thermal conductivity of the covering member is equal to or above thermal conductivity of the heat exchange bodies. |
