Patent ID: RE42609

Claim:
A system for an engine having an intake manifold coupled to an intake conduit and an exhaust manifold coupled to an exhaust conduit, the system comprising : , the engine having a compression device coupled with a first portion to the engine, and comprising a compressor coupled to into to the intake conduit and a second portion turbine coupled to the exhaust manifold of the engine, the system comprising: into the exhaust conduit and configured to drive the compressor; a combustion chamber communicating with the intake manifold and with the exhaust manifold; a soot filter coupled into the exhaust conduit downstream of the turbine; a fuel injector configured to inject a first pulse of fuel into the combustion chamber during a compression stroke and a second pulse of fuel during an expansion stroke, the compression stroke and the expansion stroke occurring during a first operating condition and in one engine cycle; a first exhaust gas exhaust-gas recirculation system having a first end coupled to the exhaust manifold upstream of the second portion of the compression device turbine and a second end coupled to the intake manifold downstream of the first portion compression device compressor , said first the first exhaust-gas recirculation system also having a first valve that , which adjusts a first flow amount from the exhaust manifold to the intake manifold; and a second exhaust gas exhaust-gas recirculation system having a first end coupled downstream of the second portion of the compression device turbine and the soot filter and a second end coupled to the intake manifold, said first the second exhaust-gas recirculation system also having a second valve that , which adjusts a second flow amount from the exhaust conduit to the intake manifold.