US 12,372,021 B2Granted

Exhaust mixer assembly

AssigneeCummins Emission Solutions Inc.

InventorsJiantao Zhou, Zhengfu Zhu, Xuesong Li, Jian Yang, Yan Wang

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Abstract

An exhaust mixer assembly includes a mixer housing, an inlet opening, an inlet plate, a support plate, a support plate opening, a conveying tube, an outlet plate, and an outlet plate opening. The mixer housing is coupled to the upstream housing. The inlet plate and the support plate define a first mixing chamber. The inlet opening is configured to receive exhaust from the upstream housing and deliver exhaust to the first mixing chamber. The support plate and the outlet plate define a second mixing chamber. The conveying tube is positioned in the second mixing chamber. The support plate opening is configured to receive treated exhaust from the first mixing chamber and deliver the treated exhaust to the second mixing chamber. The treated exhaust circumferentially flows through the second mixing chamber and through the conveying tube. The conveying tube delivers reductant to the outlet plate opening.

Claims33

Dependent claims

An exhaust mixer assembly comprising:

a mixer housing;
an inlet plate coupled to the mixer housing and comprising a first inlet opening;
a support plate coupled to the mixer housing downstream of the inlet plate, the support plate comprising a support plate opening;
a first inlet tube having an upstream end coupled to the inlet plate and configured to receive exhaust from the first inlet opening, and a downstream end that is closed by a first portion of the support plate, wherein the first inlet tube comprises a first inlet tube lateral opening that extends through a circumferential wall of the first inlet tube, and wherein the first inlet tube is offset from the support plate opening;
an outlet plate coupled to the mixer housing downstream of the support plate, the outlet plate comprising an outlet opening;
and
a conveying tube coupled to the support plate and the outlet plate, the conveying tube comprising a conveying tube lateral opening that extends through a circumferential wall of the conveying tube, wherein the conveying tube is configured to provide exhaust to the outlet opening.

4 more elements

An exhaust mixer assembly comprising:

a mixer housing;
an inlet plate coupled to the mixer housing, the inlet plate comprising:
a first inlet opening positioned on a first side of the inlet plate, and
a second inlet opening positioned on a second side of the inlet plate opposite the first inlet opening;
a support plate coupled to the mixer housing downstream of the inlet plate, the support plate comprising a support plate opening;
a first wall and a second wall extending from the inlet plate to the support plate;
a first chamber inside the first wall and the second wall, upper edges of the first wall and the second wall defining an opening into the first chamber and lower edges of the first wall and the second wall extending to the mixer housing;
a second chamber outside of the first wall and the second wall;
an outlet plate coupled to the mixer housing downstream of the support plate, the outlet plate comprising an outlet opening;
and
a conveying tube coupled to the support plate and the outlet plate, the conveying tube comprising a conveying tube lateral opening that extends through a circumferential wall of the conveying tube, wherein the conveying tube is configured to provide exhaust to the outlet opening.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/911,668Filed 10 Oct 2024
Priority: CN 202311316042.111 Oct 2023
Published: US 2025/0122820 A117 Apr 2025
Granted: 29 Jul 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

F01N 3/2892
Construction of catalytic reactors: exhaust flow directors or the like, e.g. upstream of catalytic device
B01F 23/2132
By spraying or atomising of the liquids: using nozzles
B01F 25/3141
Wherein additional components are introduced at the circumference of the conduit: with additional mixing means other than injector mixers
B01F 25/4231
By means of elements placed in the receptacle for moving or guiding the components: using baffles