Exhaust Aftertreatment System Having Mixer Assembly

摘要

An exhaust aftertreatment system may include an exhaust gas passageway and a mixer assembly. The exhaust gas passageway may receive exhaust gas output from a combustion engine. The mixer assembly may be disposed along the exhaust gas passageway and may receive the exhaust gas. The mixer assembly may include a mixer housing, a mixing bowl and an injector housing. The mixing bowl may be disposed within the mixer housing and may include an outer diametrical surface that engages an inner diametrical surface of a wall of the mixer housing. The injector housing may extend through the wall and into an aperture in the mixing bowl. The aperture may define a flow path through which at least a majority of the exhaust gas entering the mixer assembly flows. The mixing bowl may include an upstream end portion having contours directing the exhaust gas toward the injector housing.

主权项

1. An exhaust aftertreatment system comprising:
an exhaust gas passageway receiving exhaust gas output from a combustion engine; and a mixer assembly disposed along the exhaust gas passageway and receiving the exhaust gas, the mixer assembly including a mixer housing, a mixing bowl and an injector housing, the mixing bowl disposed within the mixer housing and including an outer diametrical surface that engages an inner diametrical surface of a wall of the mixer housing, the injector housing extending through the wall and into an aperture in the mixing bowl, the aperture defining a flow path through which at least a majority of the exhaust gas entering the mixer assembly flows, the mixing bowl including an upstream end portion having contours directing the exhaust gas toward the injector housing.