Single module integrated aftertreatment module

Patent metadata

Field	Value
Publication number	US-10786783-B2
Application number	US-202016750668-A
Country	US
Kind code	B2
Filing date	Jan 23, 2020
Priority date	Dec 31, 2014
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A selective catalytic reduction system may include a single housing defining a single centerline axis. The selective catalytic reduction system may also include a diesel particulate filter disposed within the single housing and having a DPF center axis aligned with the single centerline axis. The selective catalytic reduction system may also include an SCR catalyst disposed within the single housing and having a center axis aligned with the single centerline axis. In some implementations, the diesel particulate filter may include one or more SiC filters. In some implementations, the SCR catalyst may include one or more extruded SCR catalysts.

First claim

What is claimed is:

1. A system comprising:
a housing having a centerline axis;
a diesel particulate filter disposed within the housing and having a diesel particulate filter center axis aligned with the centerline axis, the diesel particulate filter comprising:
a first filter; and
a second filter separated from the first filter and located downstream of the first filter;

a sensor coupled to the housing between the first filter and the second filter, the sensor configured to detect a characteristic of exhaust gas between the first filter and the second filter;
a selective catalytic reduction catalyst disposed within the housing downstream of the diesel particulate filter and having a center axis aligned with the centerline axis;
a decomposition chamber disposed within the housing downstream of the diesel particulate filter and upstream of the selective catalytic reduction catalyst; and
a reductant delivery system configured to dose reductant into the decomposition chamber.

2. The system of claim 1 , wherein at least one of the first filter or the second filter, comprises a SiC filter.

3. The system of claim 1 , wherein the selective catalytic reduction catalyst comprises one or more extruded SCR catalysts.

4. The system of claim 1 , wherein the housing has a single inlet and a single outlet.

5. The system of claim 1 , wherein the diesel particulate filter is selectively removable from the housing through a service opening.

6. The system of claim 1 , further comprising an exhaust noise attenuation component.

7. The system of claim 1 , wherein a diameter of the decomposition chamber defined by the housing is the same as a diameter of the housing containing the diesel particulate filter.

8. The aftertreatment system of claim 1 , wherein the selective catalytic reduction catalyst comprises a water capable substrate mat.

9. An aftertreatment system configured to receive exhaust gas from an engine, the aftertreatment system comprising:
a housing having a centerline axis;
a diesel particulate filter disposed within the housing and having a diesel particulate filter center axis aligned with the centerline axis;
a selective catalytic reduction catalyst disposed within the housing downstream of the diesel particulate filter and having a center axis aligned with the centerline axis, the selective catalytic reduction catalyst comprising:
a first catalyst member; and
a second catalyst member separated from the first catalyst member and located downstream of the first catalyst member;

a sensor assembly disposed within the housing between the first catalyst member and the second catalyst member, the sensor assembly configured to detect a characteristic of exhaust gas between the first catalyst member and the second catalyst member; and
a decomposition chamber disposed within the housing downstream of the diesel particulate filter and upstream of the selective catalytic reduction catalyst.

10. The aftertreatment system of claim 9 , wherein the diesel particulate filter comprises one or more SiC filters.

11. The aftertreatment system of claim 9 , wherein the selective catalytic reduction catalyst comprises one or more extruded SCR catalysts.

12. The aftertreatment system of claim 9 , wherein the housing has a single inlet and a single outlet.

13. The aftertreatment system of claim 9 , wherein the diesel particulate filter is selectively removeable from the housing through a service opening.

14. The aftertreatment system of claim 9 , further comprising an exhaust noise attenuation component.

15. The aftertreatment system of claim 9 , wherein a diameter of the decomposition chamber defined by the housing is the same as a diameter of a portion of the housing containing the diesel particulate filter.

16. The aftertreatment system of claim 9 , wherein the selective catalytic reduction catalyst comprises a water capable substrate mat.

17. A system comprising:
a housing having a centerline axis and comprising:
a first portion having a first diameter;
a second portion downstream of the first portion and having a second diameter, the second diameter less than the first diameter; and
a third portion downstream of the second portion and having the first diameter;

a diesel particulate filter disposed within the first portion and having a diesel particulate filter center axis aligned with the centerline axis;
a decomposition chamber disposed within the second portion;
a selective catalytic reduction catalyst disposed within the third portion and having a center axis aligned with the centerline axis; and
a reductant delivery system configured to dose reductant into the decomposition chamber.

18. The system of claim 17 , wherein the first diameter is equal to a product of 2.24 and the second diameter.

19. The system of claim 18 , further comprising a sensor assembly configured to detect a characteristic of exhaust gas;
wherein the selective catalytic reduction catalyst comprises:
a first catalyst member; and
a second catalyst member separated from the first catalyst member and located downstream of the first catalyst member; and

wherein the sensor assembly is disposed within the housing between the first catalyst member and the second catalyst member and configured to detect the characteristic between the first catalyst member and the second catalyst member.

20. The system of claim 17 , further comprising a sensor configured to detect a characteristic of exhaust gas;
wherein the diesel particulate filter comprises:
a first filter; and
a second filter separated from the first filter and located downstream of the first filter; and

wherein the sensor is coupled to the housing between the first filter and the second filter and configured to detect the characteristic between the first filter and the second filter.

Assignees

• Cummins Emission Solutions Inc

Inventors

• Zoran Randolph G
• Johnson Ryan M
• Sarcona David M
• Mcdonald Jr A Carl
• Federle Kenneth R
• Buechler John G
• Lubenow Scott

Classifications

• F01B11/002

  one side of the double acting piston motor being always under the influence of the fluid under pressure · CPC title

• F01N11/002

  the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N2900/16

  said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst · CPC title

• F01N9/002

  of filter regeneration · CPC title