Patent ID: 6971377

Claim:
An exhaust gas recirculation cooler comprising: a cooling core comprising a plurality of passages for accommodating the flow of exhaust gas therethrough; an exhaust gas inlet chamber connected to the cooling core for receiving exhaust gas from an internal combustion engine and passing the exhaust gas to the cooling core; an exhaust gas outlet chamber separate from the exhaust gas inlet chamber and connected to the cooling core for receiving exhaust gas from the core; and means connected to the exhaust gas inlet chamber for permitting the controlled passage of exhaust gas from the exhaust gas inlet chamber to the exhaust gas outlet chamber without passing through the cooling core wherein the means comprises an exhaust gas bypass port disposed through a portion of the exhaust gas inlet chamber and a valve assembly connected to the cooler and having a valve member disposed adjacent the exhaust gas bypass part to regulate exhaust gas flow therethrough, wherein the exhaust gas inlet chamber and exhaust gas outlet chamber are on the same side of the cooling core and are separated from one another by a partition, and wherein the exhaust gas bypass port is disposed through the partition to permit the passage of uncooled exhaust gas from the exhaust gas inlet chamber to the exhaust gas outlet chamber.