Exhaust gas flow distribution system

摘要

An exhaust after-treatment system for treating an exhaust produced by an engine, including 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 irregularly-shaped exhaust treatment substrate positioned downstream from the mixing device; and a dispersion device positioned between the mixing device and the irregularly-shaped exhaust treatment substrate. The dispersion device includes 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 irregularly-shaped exhaust treatment substrate.

主权项

1. An exhaust after-treatment system, comprising:
an exhaust passage having a circular cross-section and 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, wherein the inlet surface of the exhaust treatment component includes a portion positioned further from the longitudinal axis of the exhaust passage than all other portions of the inlet surface; and a dispersion device disposed in the exhaust passage at a position upstream of the exhaust treatment component, the dispersion device including a cylindrical mounting ring and a plurality of deflection members, each deflection member being operable to direct part of an exhaust stream flowing through the exhaust passage in a direction to evenly distribute the exhaust flow over the inlet surface of the exhaust treatment component.