Patent ID: 7322193

Claim:
An exhaust gas recirculation (EGR) system for an internal combustion engine having a combustion air intake circuit, an exhaust manifold, a turbocharger unit having an exhaust turbine and an inlet air compressor, and an exhaust circuit for communicating engine exhaust to the environment, the EGR system comprising: an air-to-gas EGR cooler; an air supply conduit for supplying inlet air to the EGR cooler; an EGR supply conduit for communicating exhaust from the exhaust circuit to the EGR cooler; an EGR outlet conduit communicating cooled EGR from the EGR cooler to the intake circuit upstream of the compressor; a venturi unit in the exhaust circuit; and an air outlet conduit communicating heated air from the EGR cooler to the venturi unit, flow of exhaust through the exhaust line and the venturi creating a pressure which draws cooling air through the EGR cooler.