Reactant delivery for engine exhaust gas treatment

摘要

A reactant delivery system (18) for engine exhaust gas treatment may include a tank (48) in which a reactant is received, a pumping device (64), a pressure relief device (84), and a reactant distribution device. The pumping device (64) may have an inlet (74) disposed within the interior of the tank (48) to receive the reactant, and an outlet (76) through which the reactant is discharged. The pressure relief device (84) may have an inlet (86) in fluid communication with the outlet (76) of the pumping device (64), a primary outlet (90) to discharge the reactant under pressure to a downstream location, and a bypass outlet (92) through which at least some of the reactant discharged from the pumping device (64) is selectively discharged. And the reactant distribution device (102) may be in fluid communication with the bypass outlet (12) of the pressure relief device (84) and have a plurality of outlets (114) to distribute the reactant to at least two different locations within the tank (48).