Patent ID: 7971430
Filing Date: 2011-07-05
Classification: F01N,F02B,Y02T

Abstract:
1. A system for treating exhaust gases from an engine, the exhaust gases routed from the engine to atmosphere through an exhaust passage, the system comprising: an injector directing a spray of reductant into the exhaust gases; a first flow combining passage that combines exhaust gases from a plurality of cylinders into an exhaust gas flow; an exhaust separation passage, downstream of the first flow combining passage, that separates the exhaust gas flow into a plurality of separate exhaust gas flows; a plurality of oxidation catalysts, each of which receives one of the pluralities of separate exhaust gas flows; a second, downstream, flow combining passage that receives the plurality of separate exhaust gas flows and combines them into a re-combined exhaust gas flow; a turbocharger that receives the re-combined exhaust gas flow; and a selective catalytic reduction catalyst positioned downstream of the turbocharger.