Patent ID: 8739520

Claim:
An air-cooled exhaust gas heat exchanger for a motor vehicle, the exhaust gas heat exchanger comprising: a plurality of flat exhaust gas tubes configured to allow a flow of exhaust gas therethrough; a plurality of ambient air ducts arranged between the flat exhaust gas tubes and configured to allow a flow of ambient air therethrough; first and second collecting tanks configured to receive ends of the flat exhaust gas tubes; and at least one coolant duct arranged upstream of the plurality of flat exhaust gas tubes in a direction of the flow of ambient air; wherein each of the ambient air ducts comprises a plurality of fins, wherein the plurality of flat exhaust gas tubes and the plurality of fins of the ambient air ducts form a fin/tube block, and wherein each of the flat exhaust gas tubes comprises a plurality of turbulence inserts, soldered-in internal fins, or winglets.