Patent ID: 7322192
Filing Date: 2008-01-29
Classification: F02B,F02M,Y02T

Abstract:
1. An exhaust gas recirculation (EGR) system for an internal combustion engine having a combustion air intake circuit including an air filter, an exhaust circuit for communicating engine exhaust to the environment and a turbocharger unit having an exhaust turbine and an inlet air compressor, the air compressor being connected to the air filter by a compressor inlet line, the EGR system comprising: an air-to-gas EGR cooler; an EGR air inlet line communicating cooling inlet air directly from the air filter to the EGR cooler, the EGR air inlet line being connected to the compressor inlet line upstream of the compressor and downstream of the air filter; an EGR supply line communicating exhaust from the exhaust circuit to the EGR cooler; a venturi unit in the exhaust circuit; and an air outlet line communicating heated air from the EGR cooler to the venturi unit, flow of exhaust through the venturi creating a pressure which draws cooling air through the EGR cooler.