Exhaust treatment systems for work vehicles

A work vehicle, comprising:

• an engine;
• and
• an exhaust treatment system configured to receive engine exhaust from the engine, the exhaust treatment system comprising:
• a mixing conduit extending between an upstream end and a downstream end along a bulk flow direction, the upstream end of the mixing conduit being configured to receive engine exhaust;
• an injector nozzle configured to inject exhaust reductant into the mixing conduit at a location between the upstream and downstream ends of the mixing conduit;
• a first branch conduit extending between an inlet end and an outlet end, the inlet end of the first branch conduit being fluidly coupled to the mixing conduit upstream relative to the bulk flow direction of a location at which the outlet end of the first branch conduit is fluidly coupled to the mixing conduit, a portion of the engine exhaust flowing through the mixing conduit being directed through the first branch conduit, the outlet end of the first branch conduit being configured to direct the portion of the engine exhaust back into the mixing conduit such that a spiraling flow of the engine exhaust is generated within the mixing conduit;
• and
• a second branch conduit extending between a second inlet end and a second outlet end, the second inlet end of the second branch conduit being fluidly coupled to the mixing conduit upstream relative to the bulk flow direction of a location at which the second outlet end of the second branch conduit is fluidly coupled to the mixing conduit, a second portion of the engine exhaust flowing through the mixing conduit being directed through the second branch conduit, the second outlet end of the second branch conduit being configured to direct the second portion of the engine exhaust back into the mixing conduit to contribute to the spiraling flow of the engine exhaust within the mixing conduit.

An exhaust treatment system for a work vehicle, the system comprising:

• a mixing conduit extending between an upstream end and a downstream end along a bulk flow direction, the upstream end of the mixing conduit being configured to receive engine exhaust;
• an injector nozzle configured to inject exhaust reductant into the mixing conduit at a location between the upstream and downstream ends of the mixing conduit, a spray axis of the injector nozzle being parallel to the bulk flow direction;
• and
• a branch conduit extending between an inlet end and an outlet end, the inlet end of the branch conduit being fluidly coupled to the mixing conduit upstream relative to the bulk flow direction of a location at which the outlet end of the branch conduit is fluidly coupled to the mixing conduit, a portion of the engine exhaust flowing through the mixing conduit being directed through the branch conduit, at least a portion of the outlet end of the branch conduit being oriented tangent to the mixing conduit in a plane perpendicular to the bulk flow direction such that the outlet end of the branch conduit is configured to direct the portion of the engine exhaust back into the mixing conduit such that a spiraling flow of the engine exhaust is generated within the mixing conduit.