초록 ▼

An exhaust gas recirculation (EGR) system for a turbo-charged internal combustion engine is provided. The EGR system includes a recirculation conduit for recirculating a volume of exhaust gas from the exhaust manifold to the intake manifold; a bypass conduit for diverting a flow of intake air around

An exhaust gas recirculation (EGR) system for a turbo-charged internal combustion engine is provided. The EGR system includes a recirculation conduit for recirculating a volume of exhaust gas from the exhaust manifold to the intake manifold; a bypass conduit for diverting a flow of intake air around the engine; and an EGR cooler disposed in operative association with the recirculation conduit and the bypass conduit and adapted for cooling the volume of recirculated exhaust gas in the recirculation conduit. The exhaust gas recirculation cooler or heat exchanger is also adapted for concurrently heating the intake air in the bypass conduit. The heated intake air together with the exhaust gas remaining in the exhaust manifold is used to drive the turbocharger. The disclosed embodiment of the exhaust gas recirculation system also includes an air-to-air after-cooler used to cool the compressed intake air. The cool, compressed air is then diverted to the exhaust gas recirculation cooler to cool the recirculated exhaust gas.

대표청구항 ▼

[ What is claimed is:] [1.] An exhaust gas recirculation system in an internal combustion engine having an intake circuit, an intake manifold and an exhaust manifold, said intake circuit including an intake air pressurizing device, said exhaust gas recirculation system comprising:an exhaust gas reci

[ What is claimed is:] [1.] An exhaust gas recirculation system in an internal combustion engine having an intake circuit, an intake manifold and an exhaust manifold, said intake circuit including an intake air pressurizing device, said exhaust gas recirculation system comprising:an exhaust gas recirculation conduit for diverting a flow of exhaust gas to said intake manifold;an intake air bypass conduit in fluid communication with said intake circuit for permitting a flow of intake air from said intake circuit; andan exhaust gas recirculation cooler disposed in operative association with said exhaust gas recirculation conduit and said intake air bypass conduit and adapted for cooling said exhaust gas in said exhaust gas recirculation conduit.