US 2020/0271035 A1 · SYSTEMS AND METHODS FOR MIXING EXHAUST GAS AND REDUCTANT

Abstract

A mixing assembly for an exhaust aftertreatment system includes a mixing body, an upstream plate, a downstream plate, and a swirl plate. The mixing body includes an upstream mixing body opening and a downstream mixing body opening. The upstream mixing body opening is configured to receive exhaust gas. The upstream plate is coupled to the mixing body. The upstream plate includes a plurality of upstream plate openings. Each of the plurality of upstream plate openings is configured to receive a flow percentage that is less than 50% of the total flow of the exhaust gas. The downstream plate is coupled to the mixing body downstream from the upstream plate in a direction of exhaust gas flow. The downstream plate includes a downstream plate opening. The swirl plate is positioned between the upstream plate and the downstream plate and defines a swirl collection region and a swirl concentration region.

Claims20

Dependent claims

A mixing assembly for an exhaust aftertreatment system, the mixing assembly comprising:

a mixing body comprising an upstream mixing body opening and a downstream mixing body opening, the upstream mixing body opening configured to receive exhaust gas;
an upstream plate coupled to the mixing body, the upstream plate comprising a plurality of upstream plate openings, each of the plurality of upstream plate openings configured to receive a flow percentage that is less than 50% of a total flow of the exhaust gas;
a downstream plate coupled to the mixing body downstream from the upstream plate in a direction of exhaust gas flow, the downstream plate comprising a downstream plate opening;
and
a swirl plate positioned between the upstream plate and the downstream plate and defining a swirl collection region and a swirl concentration region contiguous with the swirl collection region, the swirl collection region positioned over the plurality of upstream plate openings and the swirl collection region positioned over the downstream plate opening.

2 more elements

A mixing assembly comprising:

a mixing body comprising an upstream mixing body opening and a downstream mixing body opening, the upstream mixing body opening configured to receive exhaust gas;
an upstream plate coupled to the mixing body, the upstream plate comprising:
a first upstream plate opening that is configured to receive a first flow percentage that is between 20% and 40%, inclusive of the total flow of the exhaust gas;
and
a second upstream plate opening that is configured to receive a second flow percentage that is between 20% and 40%, inclusive of the total flow of the exhaust gas;
and
an injector mount coupled to the mixing body and configured to be coupled to an injector, the injector mount defined by an injector center axis that extends between the first upstream plate opening and the second upstream plate opening.

4 more elements

A mixing assembly comprising:

a mixing body comprising an upstream mixing body opening and a downstream mixing body opening, the upstream mixing body opening configured to receive exhaust gas;
an upstream plate coupled to the mixing body, the upstream plate comprising:
a first upstream plate opening that is configured to receive a first flow percentage that is between 20% and 40%, inclusive of the total flow of the exhaust gas;
and
a second upstream plate opening that is configured to receive a second flow percentage that is between 20% and 40%, inclusive of the total flow of the exhaust gas;
and
a swirl plate coupled to the upstream plate and defining a swirl collection region and a swirl concentration region contiguous with the swirl collection region, the swirl collection region extending across the first upstream plate opening and the second upstream plate opening and the swirl collection region separated from the first upstream plate opening and second upstream plate opening by the swirl plate.

4 more elements

Dependencies are inferred from the claim text.

Systems and methods for mixing exhaust gas and reductant

Life of this patent

Systems and methods for mixing exhaust gas and reductant

Life of this patent

Abstract

Claims20