Patent ID: 8443789

Claim:
An exhaust gas recirculation system in fluid communication with an intake system of an internal combustion engine comprising: an exhaust system having an exhaust manifold in fluid communication with cylinders of the internal combustion engine and configured to remove exhaust therefrom, the exhaust manifold having a single exhaust outlet; an exhaust gas driven turbocharger having a turbine housing including a high pressure turbine inlet in fluid communication with the exhaust manifold and configured to receive exhaust gas from the single exhaust of the exhaust manifold, a low pressure turbine outlet in fluid communication with an exhaust gas conduit of the exhaust system for discharge of exhaust gas from the turbine housing and a compressor housing having a low pressure compressor inlet in communication with ambient and a high pressure compressor outlet in communication with the intake system; an exhaust gas recirculation conduit in fluid communication with the exhaust gas conduit and configured to divert a portion of exhaust gas therefrom; a low pressure exhaust gas recirculation branch extending between and fluidly connecting the exhaust gas recirculation conduit and the intake system to deliver uncompressed exhaust gas thereto; and a high pressure exhaust gas recirculation branch extending between and fluidly connecting the exhaust gas recirculation conduit and the low pressure compressor inlet of the exhaust gas driven turbocharger and configured to deliver exhaust gas to the low pressure compressor inlet for compression in said exhaust gas driven turbocharger and delivery to the intake system.