Patent ID: 8683790

Claim:
A diffuser for aiding in the vaporization and mixing of an injected reactant with the exhaust gas feed stream of an exhaust gas aftertreatment system of an internal combustion engine comprising: a diffuser configured to be disposed within an exhaust gas conduit of the exhaust gas aftertreatment system having an upstream end and a downstream end; an impingement surface located on the diffuser between the upstream end and the downstream end, wherein the diffuser is disposed such that the exhaust gas feed stream flows above and below the diffuser; and a baffle plate disposed adjacent to the downstream end of the diffuser and adjacent to the impingement surface, the baffle plate extending outwardly from the impingement surface at an acute angle relative thereto, to terminate at a baffle plate tip located intermediate of the diffuser and an inner wall of the exhaust gas conduit, and operable to trap a portion of an exhaust gas feed stream, and a reactant resident therein, to increase the vaporization and residence time of the reactant in the exhaust gas feed stream, wherein the diffuser is configured as a flat plate and the baffle plate extends across the downstream end thereof.