Exhaust treatment device

An exhaust treatment device comprising:

• an outer conduit defining a length between a first end and a second end, the outer conduit including a perimetrical wall defining an interior space and extending along the length from the first end to the second end, a longitudinal axis extending centrally through the interior space from the first end to the second end, the outer conduit having an injector mounting location, the outer conduit having an upstream portion and a downstream portion;
• a divider baffle positioned within the interior space at an intermediate location between the upstream portion and the downstream portion;
• a dosing conduit positioned within the interior space in the upstream portion, the dosing conduit extending between a first duct end and a second duct end at an angle relative to the longitudinal axis, the second duct end connecting to a first fluid pathway of the divider baffle;
• a restrictor arrangement positioned in the downstream portion, the restrictor arrangement restricting exhaust airflow as the exhaust airflow travels through the outer conduit;
• and
• a swirl member positioned between the divider baffle and the restrictor arrangement, the swirl member including a plurality of openings, wherein at least a majority of the plurality of openings are positioned on a first side of a central plane extending though the longitudinal axis.

An exhaust treatment system comprising:

• an outer conduit extending along a longitudinal axis;
• a divider baffle disposed within the outer conduit, the divider baffle separating the outer conduit into an upstream portion and a downstream portion;
• a first fluid pathway extending through the divider baffle between the upstream and downstream portions, the first fluid pathway passing through a first set of turbulence generating members;
• a second fluid pathway extending through the divider baffle between the upstream and downstream portions separate from the first fluid pathway, the second fluid pathway bypassing the turbulence generating members;
• and
• a third fluid pathway extending through the divider baffle between the upstream and downstream portions separate from the first and second fluid pathways, the third fluid pathway passing through a second set of turbulence generating members, the second set being different from the first set, wherein the first, second, and third fluid pathways combine at the downstream portion.