Patent ID: 7273045

Claim:
A system for an engine having an intake and exhaust manifold, the engine having a compression device coupled with a first portion coupled to the intake and a second portion coupled to the exhaust manifold of the engine, the system comprising: a first exhaust gas recirculation system having a first end coupled to the exhaust manifold upstream of the second portion of the compression device and a second end coupled to the intake manifold downstream of the first portion compression device, said first system also having a first valve that adjusts a first flow amount from the exhaust manifold to the intake manifold; said first system having an exhaust gas recirculation (EGR) cooler between said first valve and said exhaust manifold and a second exhaust gas recirculation system having a first end coupled downstream of the second portion of the compression device and a second end coupled upstream of the first portion of the compression device, said second system also having a second valve that adjusts a second flow amount from the exhaust to the intake, where said first valve only adjusts flow from said first exhaust gas recirculation system.