Exhaust aftertreatment system including mixer with injector cone

A mixer for an exhaust aftertreatment system comprising:

• a mixer body centered on a mixer body center axis and configured to receive exhaust and a hydrocarbon fluid;
• a first aperture extending through the mixer body, the first aperture configured to facilitate flow of exhaust through the mixer body;
• and
• a first guide plate coupled to the mixer body along a portion of the first aperture and centered on a first guide plate center axis, the first guide plate comprising:
• a first guide plate first flange and a first guide plate second flange that couple a portion of first guide plate to the mixer body,
• a first guide plate panel contiguous with the first guide plate second flange, the first guide plate panel forming a first guide plate flow aperture,
• a first guide plate sidewall contiguous with the first guide plate first flange and the first guide plate panel, the first guide plate sidewall configured to facilitate flow between the first guide plate panel and the mixer body, and
• a first guide plate tab positioned within and along a portion of the second aperture and contiguous with the first guide plate panel, wherein the first guide plate tab couples the first guide plate to the mixer body and is configured to prevent flow of exhaust along an edge of the first guide plate panel.

An aftertreatment system comprising:

• a mixer comprising:
• a mixer body defining a mixer body cavity, the mixer body centered on a mixer body center axis and configured to receive exhaust and a hydrocarbon fluid;
• a first aperture, a second aperture, and a third aperture extending through the mixer body, each of the first aperture, the second aperture, and the third aperture configured to facilitate flow of exhaust through the mixer body;
• an injector plate coupled to the mixer body along a portion of the first aperture and centered on a reference axis, the injector plate defining an injector plate aperture angled at a first opening angle away from the mixer body;
• a first guide plate coupled to the mixer body along a portion of the second aperture adjacent to the injector plate, a portion of the first guide plate angled at a second opening angle from the mixer body defining a first guide plate flow aperture;
• a second guide plate coupled to the mixer body along a portion of the third aperture adjacent to the injector plate opposite the first guide plate, a portion of the second guide plate angled at a third opening angle from the mixer body defining a second guide plate flow aperture;
• and
• an injector cone positioned on the injector plate, the injector cone comprising an injection aperture configured to facilitate flow of the hydrocarbon fluid through the injector cone and the injector plate along an injection axis;
• wherein the first guide plate flow aperture is configured to facilitate the flow of exhaust into the mixer cavity away from the injection axis and the second guide plate flow aperture is configured to facilitate the flow of exhaust into the mixer cavity toward the injection axis to facilitate swirling of exhaust.