Reductant material deposit reduction in exhaust aftertreatment systems

摘要

In one non-limiting embodiment, an apparatus for treating exhaust includes a reductant injector, an aftertreatment component including a NOx reduction catalyst, and a pathway for directing exhaust to the aftertreatment component. The pathway includes a constriction zone within which is positioned a mixing member. The constriction zone begins downstream of the reductant injector and upstream from the aftertreatment component. However, other embodiments, forms and applications are also envisioned.

主权项

1. An apparatus for treating exhaust, comprising:
a reductant injector; an aftertreatment component including a NOx reduction catalyst; and a pathway for directing said exhaust to said aftertreatment component, said pathway including a constriction zone within which is positioned a mixing member, said constriction zone beginning downstream of said reductant injector and upstream of said aftertreatment component, wherein the pathway includes a first surface upstream of and abutting the mixing member obliquely angled relative to a flow direction of said exhaust through said constriction zone and wherein the first surface defines a boundary of the pathway in a direction towards the mixing member.