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US 12,241,394 B2Granted
Dual leg aftertreatment system
AssigneeCummins Power Generation Inc.
InventorsAnkit Sakuja, Travis Alva Anderson, Srinivas Chakravarthy Bathula
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Abstract
A method of controlling an exhaust gas aftertreatment system includes receiving a plurality of emissions values from a plurality of sensors disposed in an aftertreatment system, determining a real-time conversion efficiency for one or more legs of the aftertreatment system based on the emissions values, determining a real-time conversion metric for the aftertreatment system based on the real-time conversion efficiency for the one or more legs, comparing the real-time conversion metric to an upper threshold value, and initiating a cleaning operation to clean the aftertreatment system based on a determination that the real-time conversion metric satisfies the upper threshold value.
Claims20
A method of controlling an aftertreatment system, comprising:
- receiving, by a controller, a plurality of emissions values from a plurality of sensors disposed in the aftertreatment system;
- determining, by the controller, a real-time conversion efficiency for each of a first leg and a second leg of the aftertreatment system based on the plurality of emissions values;
- determining, by the controller, a real-time conversion metric for the aftertreatment system based on the real-time conversion efficiency for the first leg and the second leg;
- comparing, by the controller, the real-time conversion metric to an upper threshold value;
- and
- initiating, by the controller, a cleaning operation to clean the aftertreatment system based on a determination that the real-time conversion metric satisfies the upper threshold value.
3 more elements
A method of controlling an aftertreatment system, comprising:
- receiving, by a controller, a plurality of emissions values from a plurality of sensors disposed in the aftertreatment system;
- determining, by the controller, a real-time conversion efficiency for one or more legs of the aftertreatment system based on the plurality of emissions values;
- determining, by the controller, a real-time conversion metric for the aftertreatment system based on the real-time conversion efficiency for the one or more legs;
- comparing, by the controller, the real-time conversion metric to an upper threshold value;
- initiating, by the controller, a cleaning operation to clean the aftertreatment system based on a determination that the real-time conversion metric satisfies the upper threshold value;
- comparing, by the controller, the real-time conversion metric to a lower threshold value;
- updating, by the controller, a counter in response to a determination that the real-time conversion metric satisfies the lower threshold value but does not satisfy the upper threshold value;
- and
- initiating, by the controller, the cleaning operation to clean the aftertreatment system in response to a determination that the counter satisfies a deviation threshold.
6 more elements
A method of controlling an aftertreatment system, comprising:
- receiving, by a controller, a plurality of emissions values from a plurality of sensors disposed in the aftertreatment system, wherein receiving the plurality of emissions values comprises:
- receiving, by the controller, an engine outlet NOx value from an engine outlet nitrogen oxide (NOx) sensor disposed upstream of the aftertreatment system;
- receiving, by the controller, a first system outlet NOx value from a first system outlet NOx sensor disposed in a first leg of the aftertreatment system;
- and
- receiving, by the controller, a second system outlet NOx value from a second system outlet NOx sensor disposed in a second leg of the aftertreatment system;
- determining, by the controller, a real-time conversion efficiency for one or more legs of the aftertreatment system based on the plurality of emissions values;
- determining, by the controller, a real-time conversion metric for the aftertreatment system based on the real-time conversion efficiency for the one or more legs;
- comparing, by the controller, the real-time conversion metric to an upper threshold value;
- and
- initiating, by the controller, a cleaning operation to clean the aftertreatment system based on a determination that the real-time conversion metric satisfies the upper threshold value.
7 more elements
A control system for an aftertreatment system, comprising:
- an engine outlet nitrogen oxide (NOx) sensor;
- a first system outlet NOx sensor configured to be disposed in a first leg of the aftertreatment system;
- a second system outlet NOx sensor configured to be disposed in a second leg of the aftertreatment system;
- a cleaning system configured to clean at least one leg of the aftertreatment system;
- and
- a controller communicably coupled to the engine outlet NOx sensor, the first system outlet NOx sensor, the second system outlet NOx sensor, and the cleaning system, the controller configured to:
- determine a first real-time conversion efficiency for the first leg based on data received from the engine outlet NOx sensor and the first system outlet NOx sensor;
- determine a second real-time conversion efficiency for the second leg based on data received from the engine outlet NOx sensor and the second system outlet NOx sensor;
- determine a real-time conversion metric for the aftertreatment system based on the first real-time conversion efficiency and the second real-time conversion efficiency;
- and
- control the cleaning system to initiate a cleaning operation to clean the aftertreatment system in response to the real-time conversion metric satisfying an upper threshold value.
8 more elements
An engine system comprising:
- an engine;
- an aftertreatment system comprising:
- an inlet pipe coupled to the engine;
- a first leg;
- a second leg;
- and
- a splitter pipe that extends between the inlet pipe and both the first leg and the second leg;
- and
- a control system comprising:
- an engine outlet nitrogen oxide (NOx) sensor disposed in the inlet pipe;
- a first system outlet NOx sensor disposed proximate an outlet of the first leg;
- a second system outlet NOx sensor disposed proximate an outlet of the second leg;
- a cleaning system configured to clean at least one of the first leg or the second leg;
- and
- a controller communicably coupled to the engine outlet NOx sensor, the first system outlet NOx sensor, the second system outlet NOx sensor, and the cleaning system, the controller configured to:
- determine a real-time conversion efficiency for at least one of the first leg or the second leg based on data received from the engine outlet NOx sensor, the first system outlet NOx sensor, and the second system outlet NOx sensor;
- determine a real-time conversion metric for the aftertreatment system based on the real-time conversion efficiency;
- and
- control the cleaning system to initiate a cleaning operation to clean the aftertreatment system in response to the real-time conversion metric satisfying an upper threshold value.
16 more elements
Dependencies are inferred from the claim text.