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- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20240052766
- Publication Date: February 15, 2024
- Appl. No: 18/268054
- Application Filed: December 17, 2021
- Assignees: Cummins Inc. (Columbus, IN, US)
- Claim: 1. A system comprising: an aftertreatment system; and a controller coupled to the aftertreatment system, the controller configured to: generate a spatially resolved model of a catalyst of the aftertreatment system, the spatially resolved model dividing the catalyst into one or more portions; and adjust the spatially resolved model based on one or more sensed values from at least one sensor upstream of the one or more portions and at least one sensor downstream of the one or more portions.
- Claim: 2. The system of claim 1, wherein the controller is further configured to: compare one or more modeled values from the spatially resolved model to one or more desired values for the aftertreatment system; and in response to the comparison, command at least one of an engine, a heater, or a doser of the aftertreatment system to achieve the one or more desired values.
- Claim: 3. The system of claim 2, wherein adjusting the spatially resolved model, the controller is further configured to: determining a gradient between the one or more sensed values from the at least one sensor upstream of the one or more portions and the one or more sensed values from the at least one sensor downstream of the one or more portions; and assigning, based on the determined gradient, new modeled values to the one or more portions.
- Claim: 4. The system of claim 1, wherein the controller is further configured to: compare one or more modeled values from the spatially resolved model to one or more desired values for the catalyst; and identify a fault in the aftertreatment system based on a difference between the one or more modeled values and the one or more desired values exceeding an error threshold.
- Claim: 5. The system of claim 1, wherein the catalyst is a Selective Catalytic Reduction (SCR) catalyst.
- Claim: 6. The system of claim 1, wherein the catalyst is a combination of a Selective Catalytic Reduction (SCR) catalyst and an Ammonia Oxidation Catalyst (AMOX).
- Claim: 7. The system of claim 1, wherein the catalyst is a first Selective Catalytic Reduction (SCR) catalyst, wherein the aftertreatment system includes a second SCR catalyst positioned upstream of the first SCR catalyst, and wherein the second SCR catalyst is relatively smaller than the first SCR catalyst.
- Claim: 8. The system of claim 7, further comprising a first reductant doser fluidly coupled to the first SCR catalyst and a second reductant doser fluidly coupled to the second SCR catalyst.
- Claim: 9. The system of claim 8, wherein the controller is further configured to: control a dosing command for the first reductant doser based on one or more modeled values of a spatially resolved modeled for the first SCR catalyst and the second SCR catalyst.
- Claim: 10. The system of claim 9, wherein the one or more modeled values are indicative of an amount of stored ammonia for one or more portions of the first SCR catalyst and the second SCR catalyst, and wherein the dosing command for the first reductant doser is based on a comparison of the one or more modeled values indicative of the amount of stored ammonia of the one or more portions of the first SCR catalyst and the second SCR catalyst to an ammonia storage threshold.
- Claim: 11. The system of claim 8, wherein the controller is further configured to: control a dosing command for the second reductant doser based on one or more modeled values of a spatially resolved modeled for the first SCR catalyst and the second SCR catalyst.
- Claim: 12. The system of claim 11, wherein the one or more modeled values are indicative of an amount of stored ammonia for one or more portions of the first SCR catalyst and the second SCR catalyst, and wherein the dosing command for the second reductant doser is based on a comparison of the one or more modeled values indicative of the amount of stored ammonia of the one or more portions of the first SCR catalyst and the second SCR catalyst to an ammonia storage threshold.
- Claim: 13. A method comprising: generating, by a controller coupled to an aftertreatment system, a spatially resolved model of a catalyst of the aftertreatment system, the spatially resolved model dividing the catalyst into one or more portions; and adjusting, by the controller, the spatially resolved model based on one or more sensed values from at least one sensor upstream of the one or more portions and at least one sensor downstream of the one or more portions.
- Claim: 14. The method of claim 13, further comprising: comparing, by the controller, one or more modeled values from the spatially resolved model to one or more desired values for the aftertreatment system; and in response to the comparison, commanding, by the controller, at least one of an engine, a heater, or a doser of the aftertreatment system to achieve the one or more desired values.
- Claim: 15. The method of claim 14, wherein adjusting the spatially resolved model comprises: determining, by the controller, a gradient between the one or more sensed values from the at least one sensor upstream of the one or more portions and the one or more sensed values from the at least one sensor downstream of the one or more portions; and assigning, by the controller, based on the determined gradient, new modeled values to the one or more portions.
- Claim: 16. The method of claim 13, further comprising: comparing, by the controller, one or more modeled values from the spatially resolved model to one or more desired values for the catalyst; and identifying, by the controller, a fault in the aftertreatment system based on a difference between the one or more modeled values and the one or more desired values exceeding an error threshold.
- Claim: 17. The method of claim 13, wherein the catalyst is a Selective Catalytic Reduction (SCR) catalyst.
- Claim: 18. A system, comprising: a processing circuit comprising at least one processor coupled to a memory, the memory storing instructions therein that, when executed by the at least one processor, cause the processing circuit to: generate a spatially resolved model of a catalyst of an aftertreatment system, the spatially resolved model dividing the catalyst into one or more portions; and adjust the spatially resolved model based on one or more sensed values from at least one sensor upstream of the one or more portions and at least one sensor downstream of the one or more portions.
- Claim: 19. The system of claim 18, wherein the instructions, when executed by the at least one processor, further cause the processing circuit to: compare one or more modeled values from the spatially resolved model to one or more desired values for the aftertreatment system; and in response to the comparison, command at least one of an engine, a heater, or a doser of the aftertreatment system to achieve the one or more desired values.
- Claim: 20. The system of claim 19, wherein the instructions, when executed by the at least one processor, further cause the processing circuit to: determine a gradient between the one or more sensed values from the at least one sensor upstream of the one or more portions and the one or more sensed values from the at least one sensor downstream of the one or more portions; and assign, based on the determined gradient, new modeled values to the one or more portions.
- Current International Class: 01; 01; 01; 01
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