Mult-mode controls for engines systems including SCR aftertreatment
First Claim
1. A system comprising:
- an internal combustion engine;
an exhaust aftertreatment system including an SCR catalyst structured to receive exhaust produced by the engine; and
a controller in operative communication with the engine and the exhaust aftertreatment system, the controller being structured toselect one of a plurality of SCR catalyst evaluations to provide a first dynamically determined weighting factor, the plurality of SCR catalyst evaluations structured to evaluate operation of the SCR catalyst using at least one of different inputs and different evaluation operations,determine an operating mode of the engine in response to an engine load and an engine speed,select one of a plurality of inputs in response to the operating mode of the engine to provide an interpolation weighting factor, the plurality of inputs including the first dynamically determined weighting factor, one or more predetermined weighting factors and a second dynamically determined weighting factor,utilize the interpolation weighting factor to interpolate between a first set of combustion control data and a second set of combustion control data to determine a set of combustion control values, andcontrol operation of the engine using the set of combustion control values.
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Accused Products
Abstract
An electronic control system is adapted to control a system including an internal combustion engine and an exhaust aftertreatment system including an SCR catalyst. The electronic control system provides a first dynamically determined weighting factor in response to performing a selected one of a plurality of calculations, determines an operating mode of the engine in response to an engine load and an engine speed, selects one of a plurality of inputs in response to the operating mode of the engine to provide an interpolation weighting factor, the plurality of inputs including the first dynamically determined weighting factor and one or more predetermined weighting factors, utilizes the interpolation weighting factor to interpolate between a first set of combustion control data and a second set of combustion control data to determine a set of combustion control values, and controls operation of the engine using the set of combustion control values.
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Citations
20 Claims
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1. A system comprising:
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an internal combustion engine; an exhaust aftertreatment system including an SCR catalyst structured to receive exhaust produced by the engine; and a controller in operative communication with the engine and the exhaust aftertreatment system, the controller being structured to select one of a plurality of SCR catalyst evaluations to provide a first dynamically determined weighting factor, the plurality of SCR catalyst evaluations structured to evaluate operation of the SCR catalyst using at least one of different inputs and different evaluation operations, determine an operating mode of the engine in response to an engine load and an engine speed, select one of a plurality of inputs in response to the operating mode of the engine to provide an interpolation weighting factor, the plurality of inputs including the first dynamically determined weighting factor, one or more predetermined weighting factors and a second dynamically determined weighting factor, utilize the interpolation weighting factor to interpolate between a first set of combustion control data and a second set of combustion control data to determine a set of combustion control values, and control operation of the engine using the set of combustion control values. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of controlling a system including an internal combustion engine, an exhaust aftertreatment system including an SCR catalyst operatively coupled with the engine, and an electronic control system in operative communication with the engine and the exhaust aftertreatment system, the method comprising:
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operating the electronic control system to perform the acts of providing a first dynamically determined weighting factor in response to performing a selected one of a plurality of calculations, the plurality calculations utilizing at least one of different inputs pertaining to operation of the SCR catalyst, and different calculations pertaining to operation of the SCR catalyst, determining an operating mode of the engine in response to an engine load and an engine speed, selecting one of a plurality of inputs in response to the operating mode of the engine to provide an interpolation weighting factor, the plurality of inputs including the first dynamically determined weighting factor, and one or more predetermined weighting factors, utilizing the interpolation weighting factor to interpolate between a first set of combustion control data and a second set of combustion control data to determine a set of combustion control values, and controlling operation of the engine using the set of combustion control values. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electronic control system adapted to control a system including an internal combustion engine and an exhaust aftertreatment system including an SCR catalyst operatively coupled with the engine, the electronic control system comprising:
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a controller; and a non-transitory controller-readable memory structured with instructions executable by the controller to provide a first dynamically determined weighting factor in response to performing a selected one of a plurality of calculations, the plurality calculations utilizing at least one of different inputs pertaining to operation of the SCR catalyst, and different calculations pertaining to operation of the SCR catalyst, determine an operating mode of the engine in response to an engine load and an engine speed, select one of a plurality of inputs in response to the operating mode of the engine to provide an interpolation weighting factor, the plurality of inputs including the first dynamically determined weighting factor and one or more predetermined weighting factors, utilize the interpolation weighting factor to interpolate between a first set of combustion control data and a second set of combustion control data to determine a set of combustion control values, and control operation of the engine using the set of combustion control values. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification