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 cooling air conduit for transporting a flow of cooling a

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 cooling air conduit for transporting a flow of cooling air; and a gas-to-air heat exchanger disposed in operative association with the recirculation conduit and the cooling air conduit and adapted for cooling the volume of recirculated exhaust gas in the recirculation conduit. The cooling air passing through the gas-to air heat exchanger can be diverted from the pressurized intake air, cooled (ATAAC) air, or even fresh ambient air obtained from a source external to said engine and which optionally may be forcibly directed through the heat exchanger via a blower. The disclosed embodiments disclose EGR systems where the exhaust gases are driven from the exhaust manifold to the intake manifold through different techniques including peak clipping EGR systems, venturi based EGR systems, pumped EGR systems or piston pumped EGR systems.

대표청구항 ▼

[ What is claimed is:] [1.]1. An exhaust gas recirculation system for a compression ignition engine having an intake circuit, an intake manifold, an exhaust circuit and an exhaust manifold, said intake circuit including an intake air pressurizing device, said exhaust gas recirculation system compris

[ What is claimed is:] [1.]1. An exhaust gas recirculation system for a compression ignition engine having an intake circuit, an intake manifold, an exhaust circuit 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 recirculated exhaust gas to said intake circuit;a cooling air conduit for transporting a flow of cooling air used to cool said recirculated exhaust gas, said cooling air conduit is in fluid communication with said exhaust circuit; andan air to EGR heat exchanger disposed in operative association with said exhaust gas recirculation conduit and said cooling air conduit and adapted for cooling said exhaust gas in said exhaust gas recirculation conduit.