초록 ▼

Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned w

Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber. The reductant injector is communicable in reductant injecting communication with exhaust gas within the chamber.

대표청구항 ▼

1. A reductant decomposition system, comprising: an exhaust gas chamber comprising an inlet and outlet, the exhaust gas chamber having a non-cylindrical and non-linear shape;a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communicati

1. A reductant decomposition system, comprising: an exhaust gas chamber comprising an inlet and outlet, the exhaust gas chamber having a non-cylindrical and non-linear shape;a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the inlet, the first exhaust gas distribution component being configured to cause swirling exhaust gas flow patterns within the exhaust gas chamber;a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the outlet, the second exhaust gas distribution component being configured to cause a swirling exhaust gas flow pattern within the second exhaust gas distribution component; anda reductant injector coupled to the exhaust gas chamber, the reductant injector being communicable in reductant injecting communication with exhaust gas within the chamber. 2. The reductant decomposition system of claim 1, wherein the inlet and outlet of the exhaust gas chamber are substantially coplanar. 3. The reductant decomposition system of claim 1, wherein the exhaust gas chamber comprises a width and a length, the width being at least 0.25 times the length. 4. The reductant decomposition system of claim 1, wherein a reductant decomposition length of the exhaust aftertreatment system is longer than an axial length between the inlet and outlet of the exhaust gas chamber. 5. The reductant decomposition system of claim 1, wherein the first exhaust gas distribution component comprises a first set of small perforations and a second set of large perforations, and wherein the small perforations of the first set face toward the reductant injector and the large perforations of the second set face away from the reductant injector. 6. The reductant decomposition system of claim 5, wherein the first set of small perforations are configured to produce turbulent exhaust flow and second set of large perforations are configured to produce substantially convective exhaust flow. 7. The reductant decomposition system of claim 1, wherein the first exhaust gas distribution component comprises a perforation tube having a first open end, a second partially closed end, and a sidewall extending between the first open and second closed ends, and wherein the perforation tube comprises a plurality of perforations formed in the sidewall and partially closed end. 8. The reductant decomposition system of claim 7, wherein the plurality of perforations comprise a first set of perforations formed in the second partially closed end, a second set of perforations formed in a first portion of the sidewall, and a third set of perforations formed in a second portion of the sidewall, wherein the first set of perforations define a first percent open area, the second set of perforations define a second percent open area, and the third set of perforations define a third percent open area, and wherein the second percent open area is greater than the first percent open area and the third percent open area is greater than the second percent open area. 9. The reductant decomposition system of claim 1, wherein the second exhaust gas distribution component comprises a plurality of blades and corresponding slots configured to create an exhaust gas vortex within the second exhaust gas distribution component. 10. The reductant decomposition system of claim 9, wherein the second exhaust gas distribution component comprises a contraction tube having an open end, closed end, and a sidewall extending between the open and closed ends, wherein the plurality of blades and slots extend lengthwise along at least a portion of the sidewall. 11. The reductant decomposition system of claim 10, wherein each of the plurality of blades are angled with respect to the sidewall at a location proximate each blade, and wherein each blade extends outwardly from an outer surface of the sidewall and inwardly from an inner surface of the sidewall. 12. The reductant decomposition system of claim 11, wherein the angle formed between each of the plurality of blades and the sidewall at the location proximate each blade is based on a distance between the open end of the contraction tube and an exhaust gas aftertreatment device downstream of the open end of the contraction tube. 13. The reductant decomposition system of claim 1, wherein a height of the exhaust gas chamber proximate the first exhaust gas distribution component is greater than a height of the exhaust gas chamber proximate the second exhaust gas distribution component. 14. An exhaust gas aftertreatment system, comprising: a diesel particulate filter through which exhaust gas flows in a first direction;a selective catalytic reduction catalyst through which exhaust gas flows in a second direction substantially opposite the first direction;a urea decomposition chamber comprising an inlet communicable in exhaust receiving communication with the diesel particulate filter and an outlet communicable in exhaust providing communication with the selective catalytic reduction catalyst, the urea decomposition chamber having a non-cylindrical and non-linear shape, and wherein the urea decomposition chamber facilitates swirling exhaust gas flow patterns within the urea decomposition chamber; anda urea injector coupled to the urea decomposition chamber, the urea injector being communicable in urea injecting communication with exhaust gas in the urea decomposition chamber. 15. The exhaust gas aftertreatment system of claim 14, further comprising an exhaust distribution component positioned within the urea decomposition chamber and communicable in exhaust receiving communication with the inlet of the urea decomposition chamber, the exhaust distribution component comprising a first set of perforations each having a first area and a second set of perforations each having a second area, wherein the first area is substantially larger than the second area. 16. The exhaust gas aftertreatment system of claim 14, further comprising an exhaust distribution component positioned within the urea decomposition chamber and communicable in exhaust providing communication with the outlet of the urea decomposition chamber, the exhaust distribution component comprising a plurality of blades configured to swirl the exhaust within the exhaust distribution component. 17. The exhaust gas aftertreatment system of claim 14, wherein a shape of the urea decomposition chamber is defined by a height, length, and width, the length being greater than the width and height, and the width being greater than the height. 18. The exhaust gas aftertreatment system of claim 14, wherein a cross-sectional shape of the urea decomposition chamber along a plane extending perpendicular to the first and second exhaust flow directions comprises a first curved portion extending about the inlet and a second curved portion extending about the outlet, and wherein exhaust gas from the diesel particulate filter flows from the inlet to the outlet of the urea decomposition chamber. 19. The exhaust gas aftertreatment system of claim 18, wherein the first and second curved portions promote swirling of exhaust gas within the urea decomposition chamber. 20. A reductant decomposition system, comprising: a reductant decomposition chamber comprising an exhaust gas inlet, and an exhaust gas outlet, the reductant decomposition chamber having a non-cylindrical and non-linear shape, and wherein the reductant decomposition chamber facilitates swirling exhaust gas flow patterns within the reductant decomposition chamber; anda reductant injector coupled to the reductant decomposition chamber, the reductant injector being communicable in reductant injecting communication with exhaust gas in the reductant decomposition chamber. 21. The reductant decomposition system of claim 20, wherein exhaust gas flows through the exhaust gas inlet in a first direction and through the exhaust gas outlet in a second direction, and wherein the first direction is substantially opposite the second direction.