Patent ID: 8763381
Filing Date: 2014-07-01
Classification: F01N,F02B,F02M

Abstract:
1. An emission system for an engine having an intake and an exhaust, comprising an emission control device coupled in the engine exhaust including: an inlet cone configured to receive a first exhaust gas flow; an outlet cone configured to expel the first exhaust gas flow; a housing coupling the inlet and outlet cones, the housing including a plurality of longitudinally positioned catalyst bricks between the inlet cone and the outlet cone, the first exhaust gas flow flowing in parallel through and within the plurality of bricks, an interior of the housing and an exterior of the bricks defining a region within the housing and outside the bricks, the housing further including a plurality of lateral baffles, each baffle having communication holes therein and within the defined region to allow communication within the region; and a housing inlet and a housing outlet in the housing configured to direct a second exhaust gas flow through the defined region, the first exhaust gas flow and second exhaust gas flow maintained separate by the exterior of the bricks; a turbocharger coupled upstream of the emission control device in the engine exhaust, an outlet of the turbocharger leading to the inlet cone of the emission control device; a first exhaust gas recirculation conduit from the engine exhaust upstream of the turbocharger to the housing inlet; and a second exhaust gas recirculation conduit from the housing outlet to the engine intake.