Patent ID: 7380544

Claim:
An integrated exhaust gas recirculation (EGR) cooler with dual coolant loops for cooling recirculation exhaust gas comprising: an exhaust gas inlet for recirculating exhaust gas; an exhaust gas outlet for recirculating exhaust gas; an exhaust gas flow path extending between the exhaust gas inlet and the exhaust gas outlet to direct recirculating exhaust gas from the exhaust gas inlet to the exhaust gas outlet; a first coolant inlet; a first coolant outlet; a first coolant flow path extending between the first coolant inlet and the first coolant outlet to direct a first coolant flow through the EGR cooler in heat exchange relation with the exhaust gas flow path; a second coolant inlet; a second coolant outlet; and a second coolant flow path extending between the second coolant inlet and the second coolant outlet to direct a second coolant flow through the EGR cooler in heat exchange relation with the exhaust gas flow path, wherein at least a portion of one of the first and second coolant flow paths is substantially counter to a flow of exhaust gas along the exhaust flow path.