Compact side inlet and outlet exhaust aftertreatment system

Patent metadata

Field	Value
Publication number	US-10830117-B2
Application number	US-201515539010-A
Country	US
Kind code	B2
Filing date	Dec 22, 2015
Priority date	Dec 31, 2014
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

An exhaust aftertreatment assembly and method of manufacturing and operating an exhaust aftertreatment assembly. An exhaust aftertreatment assembly includes an aftertreatment housing and an inlet conduit coupled to the aftertreatment housing at an inlet port so as to transfer exhaust gas into the aftertreatment housing. An inlet chamber is positioned in the aftertreatment housing. The inlet chamber is fluidly coupled to the inlet port of the aftertreatment housing to receive the exhaust gas from the inlet conduit.

First claim

The invention claimed is:

1. An exhaust aftertreatment assembly, comprising:
an aftertreatment housing including an inlet port and an outlet port, the aftertreatment housing configured to house a plurality of exhaust aftertreatment components;
an inlet chamber coupled to the aftertreatment housing, the inlet chamber fluidly coupled to the inlet port of the aftertreatment housing so as to receive and redirect an exhaust gas flow from the inlet port, and the inlet chamber being defined by a sidewall that is located at a longitudinal end of the aftertreatment assembly so as to form an end face of a longitudinal flow path defined by the aftertreatment assembly;
a plurality of flow redirection fins extending from the sidewall of the inlet chamber into an internal volume defined by the inlet chamber, the plurality of flow redirection fins extending from the sidewall in a plane that is parallel to a longitudinal axis of the aftertreatment housing, the plurality of flow redirection fins configured to redirect the exhaust gas flow entering the inlet chamber from the inlet port to flow parallel to the longitudinal axis of the aftertreatment housing;
a diesel oxidation catalyst positioned in the aftertreatment housing, the diesel oxidation catalyst fluidly coupled to the inlet chamber, the diesel oxidation catalyst having a smaller cross sectional area than the inlet chamber about the longitudinal axis of the aftertreatment housing;
a particulate filter positioned in the aftertreatment housing, the particulate filter fluidly coupled to the diesel oxidation catalyst;
a reductant injection chamber positioned in the aftertreatment housing, the reductant injection chamber fluidly coupled to the diesel oxidation catalyst, the reductant injection chamber including a reductant port configured to receive a reductant injector; and
a selective catalytic reduction component positioned in the aftertreatment housing, the selective catalytic reduction component fluidly coupled to the reductant injection chamber, the selective catalytic reduction component fluidly coupled to the outlet port in the aftertreatment housing.

2. The exhaust aftertreatment assembly of claim 1 , further comprising a baffle plate including a plurality of apertures, the baffle plate positioned between the plurality of flow redirection fins and the diesel oxidation catalyst.

3. The exhaust aftertreatment assembly of claim 1 , further comprising an ammonia oxidation catalyst positioned in the aftertreatment housing, the ammonia oxidation catalyst fluidly coupling the selective catalytic reduction component to the outlet port in the aftertreatment housing.

4. The exhaust aftertreatment assembly of claim 1 , wherein the inlet chamber includes a circular entry opening and a rectangular outlet opening, the circular entry opening in fluid communication with the inlet port of the aftertreatment housing.

5. The exhaust aftertreatment assembly of claim 4 , wherein the rectangular outlet opening of the inlet chamber is connected to the aftertreatment housing orthogonal to the longitudinal axis.

6. The exhaust aftertreatment assembly of claim 3 , wherein the diesel oxidation catalyst and the particular filter are positioned in a first flow channel along the longitudinal axis, and wherein the selective catalytic reduction component and the ammonia oxidation catalyst are in a second flow channel parallel to the first flow channel.

7. The exhaust aftertreatment assembly of claim 1 , wherein the inlet chamber is less than 100 mm in length.

8. The exhaust aftertreatment assembly of claim 1 , wherein the exhaust aftertreatment assembly is configured to receive all of the exhaust gas flow from a vehicle via the inlet port and to expel all of the exhaust gas flow via the outlet port.

9. The exhaust aftertreatment assembly of claim 1 , wherein the particulate filter is a serviceable diesel particulate filter section configured to be separately removed from the exhaust aftertreatment assembly.

10. The exhaust aftertreatment assembly of claim 1 , further comprising a noise attenuation component positioned in the aftertreatment housing.

11. An aftertreatment system, comprising:
an aftertreatment housing including an inlet port and an outlet port, the aftertreatment housing defining a longitudinal axis, the inlet port and the outlet port oriented orthogonal to the longitudinal axis of the aftertreatment housing;
an inlet chamber coupled to the aftertreatment housing, the inlet chamber fluidly coupled to the inlet port of the aftertreatment housing so as to receive and redirect an exhaust gas flow from the inlet port towards the aftertreatment housing along the longitudinal axis thereof, and the inlet chamber being defined by a sidewall that is located at a longitudinal end of the aftertreatment system so as to form an end face of a longitudinal flow path defined by the aftertreatment assembly;
a plurality of flow redirection fins extending from the sidewall of the inlet chamber into an internal volume defined by the inlet chamber, the plurality of flow redirection fins extending from the sidewall in a plane that is parallel to the longitudinal axis of the aftertreatment housing, the plurality of flow redirection fins configured to redirect the exhaust gas flow entering the inlet chamber from the inlet port to flow parallel to the longitudinal axis of the aftertreatment housing;
an outlet chamber coupled to the aftertreatment housing, the outlet chamber fluidly coupled to the outlet port of the aftertreatment housing so as to receive and redirect the exhaust gas flow from the aftertreatment housing in a direction orthogonal to the longitudinal axis of the aftertreatment housing towards the outlet port;
a reductant injection chamber positioned in the aftertreatment housing the reductant injection chamber including a reductant port configured to receive a reductant injector; and
a selective catalytic reduction component positioned in the aftertreatment housing downstream of the reductant injection chamber and fluidly coupled thereto, the selective catalytic reduction component fluidly coupled to the outlet port of the aftertreatment housing.

12. The aftertreatment system of claim 11 , further comprising:
a diesel oxidation catalyst positioned in the aftertreatment housing upstream of the reductant injection chamber and downstream of the inlet chamber and fluidly coupled thereto, the diesel oxidation catalyst having a smaller cross-sectional area than an inlet chamber cross-sectional area of the inlet chamber about the longitudinal axis of the aftertreatment housing.

13. The aftertreatment system of claim 12 , further comprising:
a particulate filter positioned in the aftertreatment housing downstream of the diesel oxidation catalyst and upstream of the reductant injection chamber, and fluidly coupled thereto.

14. The aftertreatment system of claim 13 , further comprising:
an ammonia oxidation catalyst positioned downstream of the selective catalytic reduction component and upstream of the outlet chamber, and fluidly coupled thereto.

15. The aftertreatment system of claim 11 , wherein the plurality of flow redirection fins include flow through apertures structured to permit the exhaust gas flow entering the inlet chamber at the inlet port to traverse across the entirety of inlet chamber.

16. The aftertreatment system of claim 11 , wherein the plurality of flow redirection fins include a plurality of tabs structured for coupling the plurality of flow redirection fins to a top surface of the inlet chamber.

17. The aftertreatment system of claim 11 , w

Assignees

• Cummins Emission Solutions Inc

Inventors

• Zoran Randolph G
• Sarcona David M
• Johnson Ryan M
• Nanduru Enoch

Classifications

• F01N3/2892 Primary

  Exhaust flow directors or the like, e.g. upstream of catalytic device · CPC title

• F01N2610/02

  the substance being ammonia or urea · CPC title

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N3/021

  by means of filters · CPC title