Arrangement of catalyzed TEG systems
View Patent ↗An exhaust aftertreatment system may include an aftertreatment component and thermoelectric generators. The aftertreatment component is disposed in an exhaust gas passageway. The thermoelectric generators may be disposed in the exhaust gas passageway upstream or downstream of the aftertreatment component. Each of the thermoelectric generators may have a catalytic coating and may include a radially extending fin configured to absorb heat from exhaust gas in the exhaust gas passageway. The fin of at least one of the thermoelectric generators may overlap the fin of at least another one of the thermoelectric generators.
1. An exhaust aftertreatment system comprising:
an aftertreatment component disposed in an exhaust gas passageway; and
thermoelectric generators disposed in the exhaust gas passageway upstream of the aftertreatment component, each of the thermoelectric generators having a catalytic coating and including a radially extending fin configured to absorb heat from exhaust gas in the exhaust gas passageway, the fin of at least one of the thermoelectric generators overlapping the fin of at least another one of the thermoelectric generators, wherein the fin of at least one of the thermoelectric generators is interleaved with the fin of at least another one of the thermoelectric generators.
2. The exhaust aftertreatment system of claim 1 , wherein each of the thermoelectric generators includes a plurality of fins that extend radially outward and extend longitudinally from a first axial end of the thermoelectric generator to a second axial end of the thermoelectric generator.
3. The exhaust aftertreatment system of claim 1 , wherein the fin of the at least one of the thermoelectric generators is disk-shaped.
4. The exhaust aftertreatment system of claim 1 , wherein each thermoelectric generator has a plurality of disk-shaped fins spaced axially apart from each other.
5. The exhaust aftertreatment system of claim 1 , wherein the fin of the at least one of the thermoelectric generators is helically-shaped.
6. The exhaust aftertreatment system of claim 5 , wherein the helically-shaped fin is defined by a rotational axis that is perpendicular to a direction of flow through the exhaust gas passageway.
7. The exhaust aftertreatment system of claim 1 , wherein each of the thermoelectric generators includes a plurality of helical fins.
8. The exhaust aftertreatment system of claim 7 , wherein the plurality of helical fins of each thermoelectric generator are defined by a common rotational axis and are rotationally offset from each other and interleaved with each other.
9. The exhaust aftertreatment system of claim 1 , wherein a catalyst of the catalytic coating is selected from the group consisting of: a three-way catalyst, a platinum-group metal catalyst, a lean NO x trap catalyst, and a hydrocarbon lean NO x catalyst.
10. The exhaust aftertreatment system of claim 1 , wherein the aftertreatment component is selected from the group consisting of: an oxidation catalyst, a particulate filter, and a selective catalytic reduction catalyst.
11. The exhaust aftertreatment system of claim 1 , wherein the thermoelectric generators are disposed upstream of a turbocharger.
12. The exhaust aftertreatment system of claim 11 , wherein the thermoelectric generators are disposed upstream of a particulate filter.
13. The exhaust aftertreatment system of claim 1 , wherein the thermoelectric generators are disposed downstream of a turbocharger and upstream of a particulate filter.
14. The exhaust aftertreatment system of claim 13 , wherein the thermoelectric generators function as an oxidation catalyst.
15. The exhaust aftertreatment system of claim 1 , wherein the thermoelectric generators are disposed downstream of a turbocharger and a particulate filter and upstream of a selective catalytic reduction catalyst.
16. An exhaust aftertreatment system comprising:
an aftertreatment component disposed in an exhaust gas passageway; and
thermoelectric generators disposed in the exhaust gas passageway downstream of the aftertreatment component, each of the thermoelectric generators having a catalytic coating and including a radially extending fin configured to absorb heat from exhaust gas in the exhaust gas passageway, the fin of at least one of the thermoelectric generators overlapping the fin of at least another one of the thermoelectric generators, wherein the fin of at least one of the thermoelectric generators is interleaved with the fin of at least another one of the thermoelectric generators.
17. The exhaust aftertreatment system of claim 16 , wherein each of the thermoelectric generators includes a plurality of fins that extend radially outward and extend longitudinally from a first axial end of the thermoelectric generator to a second axial end of the thermoelectric generator.
18. The exhaust aftertreatment system of claim 16 , wherein the fin of the at least one the thermoelectric generators is disk-shaped.
19. The exhaust aftertreatment system of claim 16 , wherein each thermoelectric generator has a plurality of disk-shaped fins spaced axially apart from each other.
20. The exhaust aftertreatment system of claim 16 , wherein the fin of the at least one the thermoelectric generators is helically-shaped.
21. The exhaust aftertreatment system of claim 20 , wherein the helically-shaped fin is defined by a rotational axis that is perpendicular to a direction of flow through the exhaust gas passageway.
22. The exhaust aftertreatment system of claim 16 , wherein each of the thermoelectric generators includes a plurality of helical fins.
23. The exhaust aftertreatment system of claim 22 , wherein the plurality of helical fins of each thermoelectric generator are defined by a common rotational axis and are rotationally offset from each other and interleaved with each other.
24. The exhaust aftertreatment system of claim 16 , wherein a catalyst of the catalytic coating is selected from the group consisting of: a three-way catalyst, a platinum-group metal catalyst, a lean NO x trap catalyst, and a hydrocarbon lean NO x catalyst.
25. The exhaust aftertreatment system of claim 16 , wherein the aftertreatment component is selected from the group consisting of: an oxidation catalyst and a particulate filter.
26. The exhaust aftertreatment system of claim 16 , wherein the thermoelectric generators are disposed downstream of a turbocharger and a particulate filter.
27. The exhaust aftertreatment system of claim 26 , wherein the thermoelectric generators are disposed upstream of a selective catalytic reduction catalyst.
28. The exhaust aftertreatment system of claim 26 , wherein the catalytic coating is a selective catalytic reduction coating.
29. An exhaust aftertreatment system comprising:
an exhaust gas passageway receiving exhaust gas from a combustion engine; and
a thermoelectric generator system disposed in the exhaust gas passageway and including a plurality of catalyst-coated cartridges each having a fin configured to absorb heat from the exhaust gas in the exhaust gas passageway, at least one of the fins being defined by a rotational axis that is perpendicular to a direction of flow through the exhaust gas passageway, the fin of at least one of the plurality of cartridges overlapping the fin of at least another one of the plurality of cartridges, wherein the fin of at least one of the plurality of cartridges is interleaved with the fin of at least another one of the plurality of cartridges.
30. The exhaust aftertreatment system of claim 29 , wherein each fin has a helical shape extending around a corresponding rotational axis.
31. The exhaust aftertreatment system of claim 29 , wherein each of the plurality of cartridges includes a plurality of helical fins that are interleaved with each other.
32. The exhaust aftertreatment system of claim 31 , wherein the plurality of helical fins of each of the plurality of cartridges are defined by a common rotational axis and are rotationally offset from each other.
33. The exhaust aftertreatment system of claim 32 , wherein the thermoelectric generator system is disposed upstream of a turbocharger.
34. The exhaust aftertreatment system of claim 33 , wherein the thermoelectric generator system is disposed upstream of a particulate filter.
35. The exhaust aftertreatment system of claim 34 , wherein the thermoelectric generator system functions as an oxidation catalyst.
36. The exhaust aftertreatment system of claim 32 , wherein the thermoelectric generator system is disposed downstream of a turbocharger and upstream of a particulate filter.
37. The exhaust aftertreatment system of claim 32 , wherein the thermoelectric generator system is disposed downstream of a turbocharger and a particulate filter and upstream of a selective catalytic reduction catalyst.
38. The exhaust aftertreatment system of claim 29 , wherein the plurality of cartridges are coated with a catalyst selected from the group consisting of: a three-way catalyst, a platinum-group metal catalyst, a lean NO x trap catalyst, a hydrocarbon lean NO x catalyst, and a selective catalytic reduction catalyst.