Exhaust gas aftertreatment system

An exhaust gas aftertreatment system comprising:

• an exhaust gas conduit centered on a conduit center axis;
• a mixer comprising:
• a mixer body, and
• a vane plate having a plurality of vanes, at least one of the vanes being coupled to the mixer body;
• a perforated plate extending across the exhaust gas conduit and disposed downstream of the mixer, the perforated plate comprising a plurality of perforations that are each configured to facilitate passage of exhaust gas through the perforated plate;
• and
• a first flow disrupter projecting from the perforated plate or integrally formed with the perforated plate, the first flow disrupter extending towards the conduit center axis.

An exhaust gas aftertreatment system comprising:

• an exhaust gas conduit centered on a conduit center axis and comprising an inner surface;
• a mixer comprising a mixer outlet disposed along a mixer outlet plane;
• a perforated plate coupled to the exhaust gas conduit and disposed downstream of the mixer, the perforated plate comprising a plurality of perforations that are each configured to facilitate passage of exhaust gas through the perforated plate;
• and
• a flow disrupter disposed downstream of the mixer and circumferentially around the conduit center axis, the flow disrupter extending inwardly from the inner surface, the flow disrupter configured such that:
• 0.10*dc≤Sd≤0.30*dc, where dc is a conduit diameter of the exhaust gas conduit and Sd is a flow disrupter separation along the conduit center axis between the flow disrupter and the mixer outlet plane, and
• 0.05*dc≤hr≤0.30*dc, where hr is a height of the flow disrupter from the exhaust gas conduit to a center point of a downstream edge of the flow disrupter;
• wherein the flow disrupter is:
• coupled to the exhaust gas conduit,
• integrally formed with the exhaust gas conduit,
• coupled to the perforated plate, or
• integrally formed with the perforated plate.

An exhaust gas aftertreatment system comprising:

• an exhaust gas conduit centered on a conduit center axis and comprising an inner surface;
• a mixer comprising:
• a mixer body spaced apart from the inner surface, and
• a vane plate having a plurality of vanes, at least one of the vanes being coupled to the mixer body;
• and
• a plurality of flow disrupters disposed downstream of the mixer, circumferentially around the conduit center axis, and spaced apart from the conduit center axis, each of the flow disrupters extending inwardly from the inner surface and integrally formed with the exhaust gas conduit.