Dual leg aftertreatment system
AssigneeCummins Power Generation Inc.
InventorsAnkit Sakuja, Travis Alva Anderson, Srinivas Chakravarthy Bathula
Life of this patent
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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 flow imbalance in an exhaust system, comprising:
- receiving, by a controller, a plurality of emissions values from a plurality of sensors disposed in the exhaust system;
- determining, by the controller, a real-time conversion efficiency for each of a first bank and a second bank of the exhaust system based on the plurality of emissions values;
- determining, by the controller, a real-time conversion metric for the exhaust system based on the real-time conversion efficiency for the first bank and the second bank;
- and
- initiating, by the controller, a cleaning operation to clean at least one of the first bank or the second bank based on a determination that the real-time conversion metric satisfies an upper threshold value.
A control system for controlling flow imbalance in an exhaust system, the control system comprising:
- an engine outlet nitrogen oxide (NOx) sensor;
- a first system outlet NOx sensor configured to be disposed in a first bank of the exhaust system;
- a second system outlet NOx sensor configured to be disposed in a second bank of the exhaust system;
- a cleaning system configured to clean at least one bank of the exhaust 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 bank 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 bank 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 exhaust 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 at least one of the first bank or the second bank in response to the real-time conversion metric satisfying an upper threshold value.
An engine system comprising:
- an engine;
- an exhaust system comprising:
- a first bank;
- a second bank;
- and
- ;
- and
- a control system comprising:
- an engine outlet nitrogen oxide (NOx) sensor disposed at an inlet of at least one of the first bank or the second bank;
- a first system outlet NOx sensor disposed in the first bank or proximate an outlet of the first bank;
- a second system outlet NOx sensor disposed in the second bank or proximate an outlet of the second bank;
- a cleaning system configured to clean at least one of the first bank or the second bank;
- 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 bank or the second bank 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 exhaust system based on the real-time conversion efficiency;
- and
- control the cleaning system to initiate a cleaning operation to clean the at least one of the first bank or the second bank in response to the real-time conversion metric satisfying an upper threshold value.
Dependencies are inferred from the claim text.