Exhaust gas flow distribution system

An exhaust after-treatment system, comprising:

• an exhaust passage;
• an exhaust treatment component in communication with the exhaust passage;
• and
• a dispersion device disposed in the exhaust passage at a position upstream of the exhaust treatment device, the dispersion device including a cylindrical mounting ring and a plurality of dispersion members each being operable to direct an exhaust stream flowing through the dispersion device into a plurality of different directions to disperse the exhaust flow over substantially an entire surface of the exhaust treatment component, wherein the cylindrical mounting ring includes a radially-inwardly-extending flange including a plurality of second cut-outs formed therein.

An exhaust after-treatment system, comprising:

• An exhaust passage;
• An exhaust treatment component in communication with the exhaust passage;
• and
• A dispersion device disposed in the exhaust passage at a position upstream of the exhaust treatment device, the dispersion device including a cylindrical mounting ring and a plurality of dispersion members each being operable to direct an exhaust stream flowing through the dispersion device into a plurality of different directions to disperse the exhaust flow over substantially an entire surface of the exhaust treatment component, wherein the exhaust passage includes a depression that radially narrows the exhaust passage, and the cylindrical mounting ring includes an aperture that overlaps the depression.

An exhaust after-treatment system for treating an exhaust produced by an engine, comprising:

• an exhaust passage in communication with the engine;
• an injector for dosing an exhaust treatment fluid into the exhaust passage;
• a mixing device positioned downstream from the injector, the mixing device operable to intermingle the exhaust treatment fluid and the exhaust;
• an exhaust treatment substrate positioned downstream from the mixing device;
• and
• a dispersion device positioned between the mixing device and the exhaust treatment substrate, the dispersion device including a plurality of dispersion members each being operable to direct an exhaust stream flowing through the dispersion device into a plurality of different directions to disperse the exhaust flow over substantially an entire surface of the exhaust treatment substrate, wherein the dispersion device includes a cylindrical mounting ring, and each of the dispersion members extend from the cylindrical mounting ring, wherein the cylindrical mounting ring includes a radially-inwardly-extending flange, and further wherein the radially-inwardly-extending flange includes a plurality of second cut-outs formed therein.

An exhaust after-treatment system for treating an exhaust produced by an engine, comprising:

• an exhaust passage in communication with the engine;
• an injector for dosing an exhaust treatment fluid into the exhaust passage;
• a mixing device positioned downstream from the injector, the mixing device operable to intermingle the exhaust treatment fluid and the exhaust;
• an exhaust treatment substrate positioned downstream from the mixing device;
• and
• a dispersion device positioned between the mixing device and the exhaust treatment substrate, the dispersion device including a plurality of dispersion members each being operable to direct an exhaust stream flowing through the dispersion device into a plurality of different directions to disperse the exhaust flow over substantially an entire surface of the exhaust treatment substrate, wherein the dispersion device includes a cylindrical mounting ring, and each of the dispersion members extend from the cylindrical mounting ring, and further wherein the exhaust passage includes a depression that radially narrows the exhaust passage, and the cylindrical mounting ring includes an aperture that overlaps the depression.

An exhaust after-treatment system, comprising:

• an exhaust passage including a longitudinal axis;
• an exhaust treatment component having an inlet surface with a noncircular cross-sectional shape and being in communication with the exhaust passage, the inlet surface having a centroid offset from the longitudinal axis;
• and
• a dispersion device disposed in the exhaust passage and positioned upstream of the exhaust treatment device, the dispersion device including at least one deflection member operable to direct a portion of an exhaust stream flowing through the exhaust passage toward a portion of the inlet surface furthest from the longitudinal axis to evenly distribute the exhaust flow over the entire inlet surface.