Patent ID: 7971433
Filing Date: 2011-07-05
Classification: F01N,Y02A,Y02T

Abstract:
1. A system for treating exhaust gasses from an engine, the exhaust gasses routed from the engine to atmosphere, the system comprising: a helical exhaust passage, the helical exhaust passage having an inlet transition section, an expansion cone, and a plurality of spatially separated exhaust passages there between, where exhaust gas flow is received by the plurality of spatially separated exhaust passages from the inlet transition section and is separated into a plurality of separate exhaust gas flows by the plurality of separated exhaust passages, and where the plurality of separate exhaust gas flows are received by the expansion cone and form a re-combined exhaust gas flow therein, at least one of the plurality of separated exhaust passages including a rearward curved section that curves radially inward and at a rotational angle towards a central longitudinal flow axis to induce a helical flow pattern within the re-combined exhaust gas flow formed inside the expansion cone.