Patent ID: 7707997
Filing Date: 2010-05-04
Classification: F02M,F28D,F28F

Abstract:
1. A cooling apparatus of an exhaust gas recirculation system, comprising: a first cooling portion, comprising a first material, that receives recirculation exhaust gas; and a second cooling portion, comprising a second, different material, that receives the recirculation exhaust gas from the first cooling portion and exhausts the recirculation exhaust gas out of the apparatus; wherein the second material comprises a heat-resistant temperature that is lower than a heat-resistant temperature of the first material, and the second material is less dense than the first material; wherein the recirculation exhaust gas flows in a first direction within the first cooling portion, and in a second, substantially opposite direction within the second cooling portion; and wherein the first cooling portion comprises a first coolant passage, and the second cooling portion comprises a second coolant passage, wherein coolant flows through the passages.