TWO FLUID HEAT EXCHANGER

摘要

A heat exchanger for utilization in an exhaust gas recirculation system of an automotive internal combustion engine to reduce the temperature level of the exhaust gas from the combustion cycle that is metered from the exhaust manifold and recycled through the combustion cycle. The heat exchanger includes a pair of generally conformably nesting shells providing a relatively narrow chamber or envelope for fluid movement generally encompassing a central chamber in the inner shell for the hot gases; the central chamber having a turbulizer or fin member to enhance movement of heat outwardly from the exhaust gas passing therethrough to the fluid circulating through the outer envelope. The inner chamber may have a central spreader acting to move the exhaust gas outwardly toward the outer wall of the inner shell.