IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
UP-0156167
(2005-06-17)
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| 등록번호 |
US-7698887
(2010-05-20)
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|
발명자
/ 주소 |
- Venghaus, Helmut
- Watts, Lee
- Mayr, Andreas
- Telford, Clive D.
- Ranalli, Marco
- Kroner, Peter
- Herranz, David
- Speer, Gregg
- Schmidt, Stefan
- Walleck, A. Steven
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
0 인용 특허 :
62 |
초록
▼
An apparatus comprises an emissions trap and a loading determination device. The emissions trap is configured to trap emissions present in exhaust gas and comprises a first local region and a second local region. The loading determination device is configured to determine emissions loading of the fi
An apparatus comprises an emissions trap and a loading determination device. The emissions trap is configured to trap emissions present in exhaust gas and comprises a first local region and a second local region. The loading determination device is configured to determine emissions loading of the first local region and emissions loading of the second local region. An associated method is disclosed.
대표청구항
▼
The invention claimed is: 1. A method of controlling a trap regenerator, comprising receiving an electrical resistance measurement of a first local region of an emissions trap that is indicative of emissions loading of the first local region, receiving an electrical resistance measurement of a seco
The invention claimed is: 1. A method of controlling a trap regenerator, comprising receiving an electrical resistance measurement of a first local region of an emissions trap that is indicative of emissions loading of the first local region, receiving an electrical resistance measurement of a second local region of the emissions trap that is indicative of emissions loading of the second local region, generating the electrical resistance measurements of the first and the second local regions by applying a voltage between at least two electrodes that are spaced apart from each other at each of the first and the second local regions, and generating a control signal for the trap regenerator that results in the trap regenerator regenerating the trap in response to determining that received electrical resistance measurements for the first local region and the second local region satisfy predetermined regeneration criteria. 2. The method of claim 1, further comprising generating the control signal to regenerate the emissions trap if the electrical resistance measurements for the first and second local regions satisfy predetermined regeneration criteria. 3. The method of claim 1, wherein the emissions trap is a soot trap comprising the first and second local regions, further comprising generating the electrical resistance measurement for the first local region based upon a soot loading of the first local region of the soot trap, and generating the electrical resistance measurement for the second local region based upon a soot loading of the second local region of the soot trap. 4. The method of claim 1, wherein the emissions trap is a NOx trap comprising the first and second local regions, further comprising generating the electrical resistance measurement for the first local region based upon a NOx loading of the first local region of the NOx trap, and generating the electrical resistance measurement for the second local region based upon a NOx loading of the second local region of the NOx trap. 5. The method of claim 1 including spacing the electrodes apart from each other in a radial direction. 6. The method of claim 1 including spacing the electrodes apart from each other in an axial direction. 7. The method of claim 1 wherein the at least two electrodes comprises at least one external electrode that is external to the emissions trap, a first electrode located at the first local region, and a second electrode located at the second local region. 8. A method of controlling a trap regenerator, comprising receiving an electrical resistance measurement of a first local region of an emissions trap that is indicative of emissions loading of the first local region, generating the electrical resistance measurement of the first local region based upon applying a voltage between a first internal electrode internal to the emissions trap and an external electrode external to the emissions trap, receiving an electrical resistance measurement of a second local region of the emissions trap that is indicative of emissions loading of the second local region, generating the electrical resistance measurement of the second local region based upon applying a voltage between the external electrode and a second internal electrode internal to the emissions trap or between the second internal electrode and a third internal electrode internal to the emissions trap, and generating a control signal for the trap regenerator that results in the trap regenerator regenerating the trap in response to determining that received electrical resistance measurements for the first local region and the second local region satisfy predetermined regeneration criteria. 9. An apparatus, comprising: an emissions trap that is configured to trap emissions present in exhaust gas and that comprises a first local region and a second local region, a determining device to measure an electrical resistance of the first local region and an electrical resistance of the second local region, the determining device including at least two electrodes spaced apart from each other at each of the first and second local regions, and a trap regenerator and a controller that is coupled to the determining device to receive therefrom electrical resistance information about the first and second local regions and that is coupled to the trap regenerator to operate the trap regenerator to regenerate the emissions trap if the electrical resistance information about the first and second local regions satisfies predetermined regeneration criteria. 10. The apparatus of claim 9, wherein the first and second local regions are positioned circumferentially about an axis of the emissions trap relative to one another such that the determining device is configured to determine circumferential distribution of emissions between the first and second local regions. 11. The method of claim 9, wherein the first and second local regions are positioned radially relative to one another with respect to an axis of the emissions trap such that the determining means is configured to determine radial distribution of emissions between the first and second local regions. 12. The method of claim 9, wherein the first and second local regions are positioned axially along an axis of the emissions trap relative to one another such that the determining device is configured to determine axial distribution of emissions between the first and second local regions. 13. The apparatus of claim 9, wherein the at least two electrodes comprises at least one external electrode that is external to the emissions trap, a first internal electrode located at the first local region, and a second internal electrode located at the second local region. 14. An apparatus, comprising: an emissions trap that is configured to trap emissions present in exhaust gas and that comprises a first local region and a second local region, a determining device to measure an electrical resistance of the first local region and an electrical resistance of the second local region wherein the determining device comprises (i) a generally ring-shaped first set of internal electrodes internal to the emissions trap and positioned circumferentially about an axis of the emissions trap relative to one another and (ii) an external electrode configured as a housing surrounding the emissions trap and the first set of internal electrodes, and a trap regenerator and a controller that is coupled to the determining device to receive therefrom electrical resistance information about the first and second local regions and that is coupled to the trap regenerator to operate the trap regenerator to regenerate the emissions trap if the electrical resistance information about the first and second local regions satisfies predetermined regeneration criteria. 15. The apparatus of claim 14, wherein: the determining means comprises a generally ring-shaped second set of internal electrodes internal to the emissions trap and positioned circumferentially about the axis relative to one another, the first and second sets of internal electrodes are positioned axially along the axis relative to one another, and the housing surrounds the second set of internal electrodes. 16. An apparatus, comprising: an emissions trap that is configured to trap emissions present in exhaust gas and that comprises a first local region and a second local region, a determining device to measure an electrical resistance of the first local region and an electrical resistance of the second local region wherein the determining device comprises a first internal electrode internal to the emissions trap, a second internal electrode internal to the emissions trap, and an external electrode external to the emissions trap, and a trap regenerator and a controller that is coupled to the determining device to receive therefrom electrical resistance information about the first and second local regions and that is coupled to the trap regenerator to operate the trap regenerator to regenerate the emissions trap if the electrical resistance information about the first and second local regions satisfies predetermined regeneration criteria. 17. An apparatus, comprising: an emissions trap that is configured to trap emissions present in exhaust gas and that comprises a first local region and a second local region, and a loading determination device configured to determine emissions loading of the first local region and emissions loading of the second local region based upon an electrical resistance measurement of the first local region and an electrical resistance measurement of the second local region, and wherein the load determination device including at least two electrodes that are spaced apart from each other at each of the first and second local regions with a voltage being applied between electrodes to determine the electrical resistance. 18. The apparatus of claim 17, wherein the emissions trap is a soot trap. 19. The apparatus of claim 17, wherein the emissions trap is a NOx trap. 20. The apparatus of claim 17, wherein the at least two electrodes comprises at least one external electrode that is external to the emissions trap, a first internal electrode located at the first local region, and a second internal electrode located at the second local region.
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