Decomposition Mitigation Assembly for Diesel Exhaust Fluid Deposit Control

The exhaust flow path is segmented into multiple zones using divider walls. The injection flow path divider wall and bypass flow path divider wall create separate channels that guide exhaust flow around and through the DEF injection point, ensuring thorough mixing while preventing wall contact. This segmentation of the flow path resolves the contradiction by structurally enforcing proper mixing without requiring complex injector mechanisms.

The exhaust flow itself acts as an intermediary medium that carries DEF from the injection point throughout the decomposition chamber. By designing the flow paths so that exhaust continuously circulates through the chamber, DEF is naturally dispersed and mixed without requiring additional mechanical mixing devices. This intermediary approach eliminates deposit formation while maintaining simple operation.

The system dynamically manages DEF distribution through controlled exhaust flow patterns. The divider walls create a dynamic circulation pattern where exhaust flow continuously moves DEF away from wall surfaces and redistributes it through the chamber. This dynamic flow management allows higher DEF injection rates for improved NOx reduction while preventing the static conditions that lead to puddling and deposit formation.

The system uses pneumatic principles by leveraging exhaust gas flow to transport and disperse DEF throughout the decomposition chamber. The designed flow paths ensure that exhaust velocity and pressure dynamically carry DEF droplets away from inner walls, preventing accumulation even at high injection rates. This pneumatic transport mechanism resolves the contradiction between productivity and harmful effects.

The solution moves from considering only injector design to incorporating the spatial dimension of the entire decomposition chamber. By designing three-dimensional flow paths with divider walls that create circulation patterns throughout the chamber volume, the system achieves thorough mixing without complex injector internals. This dimensional approach to flow management resolves the contradiction by distributing mixing function across the entire chamber space rather than concentrating complexity in the injector.

The exhaust flow itself performs the mixing function by naturally circulating through the chamber and carrying DEF throughout. The simple injector design injects DEF into the exhaust stream, and the exhaust's own kinetic energy and the chamber's flow path geometry enable self-mixing without additional mechanical components. This self-service approach resolves the contradiction by eliminating complex injector mechanisms while maintaining effective mixing through the exhaust's inherent flow characteristics.