Multivariable control for an engine
First Claim
1. A method for controlling a diesel engine system, wherein the diesel engine system includes a diesel engine having an intake manifold and an exhaust manifold, a turbine that is variably driven by exhaust gas received from the exhaust manifold wherein the degree the turbine is driven by the exhaust gas is set by a set position of the turbine, the turbine driving a compressor that provides compressed air to the intake manifold, the diesel engine system also includes an adjustable exhaust gas recirculation (EGR) valve that receives exhaust gas via the exhaust manifold and provides a selected amount of the exhaust gas to the intake manifold wherein the selected amount is set by a set position of the EGR valve, the method comprising the steps of:
- providing a multivariable vehicle controller adapted to control the set positions of the turbine and/or the EGR valve using a control algorithm, the vehicle controller configured to provide on-line control of the diesel engine during engine operation;
sensing a current value of one or more parameters related to the composition of the exhaust gas of the diesel engine;
inputting the current value of the one or more sensed parameters and one or more past sensed parameters relating to the composition of the exhaust gas to the multivariable vehicle controller; and
setting a current set position for the turbine and/or a current set position for the EGR valve to effect a future value of at least one of the one or more parameters, wherein the current set position(s) is/are dependent on the one or more sensed parameters inputted to the vehicle controller.
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Accused Products
Abstract
A multivariable controller that models the interaction between groups of sensors and groups of actuators during the operation of an engine. By accounting for the interactive effects that a group of actuators has on a sensor or group of sensors, improved system performance may be achieved. When emission sensors are used, such as NOX and/or PM sensors, the multivariable controller may help control the various engine actuators to reduce emissions of the engine.
299 Citations
34 Claims
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1. A method for controlling a diesel engine system, wherein the diesel engine system includes a diesel engine having an intake manifold and an exhaust manifold, a turbine that is variably driven by exhaust gas received from the exhaust manifold wherein the degree the turbine is driven by the exhaust gas is set by a set position of the turbine, the turbine driving a compressor that provides compressed air to the intake manifold, the diesel engine system also includes an adjustable exhaust gas recirculation (EGR) valve that receives exhaust gas via the exhaust manifold and provides a selected amount of the exhaust gas to the intake manifold wherein the selected amount is set by a set position of the EGR valve, the method comprising the steps of:
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providing a multivariable vehicle controller adapted to control the set positions of the turbine and/or the EGR valve using a control algorithm, the vehicle controller configured to provide on-line control of the diesel engine during engine operation; sensing a current value of one or more parameters related to the composition of the exhaust gas of the diesel engine; inputting the current value of the one or more sensed parameters and one or more past sensed parameters relating to the composition of the exhaust gas to the multivariable vehicle controller; and setting a current set position for the turbine and/or a current set position for the EGR valve to effect a future value of at least one of the one or more parameters, wherein the current set position(s) is/are dependent on the one or more sensed parameters inputted to the vehicle controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for controlling a diesel engine system, wherein the diesel engine system includes a diesel engine having an intake manifold and an exhaust manifold, a turbine that is variably driven by exhaust gas received from the exhaust manifold wherein the degree the turbine is driven by the exhaust gas is set by a set position of the turbine, the turbine driving a compressor that provides compressed air to the intake manifold, the diesel engine system also includes an adjustable exhaust gas recirculation (EGR) valve that receives exhaust gas via the exhaust manifold and provides a selected amount of the exhaust gas to the intake manifold wherein the selected amount is set by a set position of the EGR valve, the method comprising the steps of:
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sensing a current value and one or more past values of one or more parameters related to the composition of the exhaust gas of the diesel engine; and setting a current set position for the EGR valve to effect a future value of at least one of the one or more parameters, wherein the current set position of the EGR valve is set using a multivariable vehicle controller configured to provide on-line control of the diesel engine during engine operation, wherein the vehicle controller receives as inputs the current value and one or more past values of one or more of the sensed parameters. - View Dependent Claims (29, 30)
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31. A method for controlling a diesel engine system, wherein the diesel engine system includes a diesel engine having an intake manifold and an exhaust manifold, a turbine that is variably driven by exhaust gas received from the exhaust manifold wherein the degree the turbine is driven by the exhaust gas is set by a set position of the turbine, the turbine driving a compressor that provides compressed air to the intake manifold, the diesel engine system also includes an adjustable exhaust gas recirculation (EGR) valve that receives exhaust gas via the exhaust manifold and provides a selected amount of the exhaust gas to the intake manifold wherein the selected amount is set by a set position of the EGR valve, the method comprising the steps of:
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sensing a current value and one or more past values of one or more parameters related to the composition of the exhaust gas of the diesel engine; and setting a current set position of the turbine to effect a future value of at least one of the one or more parameters, wherein the current set position of the turbine is set using a multivariable vehicle controller configured to provide on-line control of the diesel engine during engine operation, wherein the vehicle controller receives as inputs the current value and one or more past values of one or more of the sensed parameters.
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32. A method of controlling a diesel engine system, wherein the diesel engine system includes a diesel engine having an intake manifold and an exhaust manifold, a turbine that is variably driven by exhaust gas received from the exhaust manifold wherein the degree the turbine is driven by the exhaust gas is set by a set position of the turbine, the turbine driving a compressor that provides compressed air to the intake manifold, the diesel engine system also includes an adjustable exhaust gas recirculation (EGR) valve that receives exhaust gas via the exhaust manifold and provides a selected amount of the exhaust gas to the intake manifold wherein the selected amount is set by a set position of the EGR valve, the method comprising the steps of:
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sensing two or more parameters related to the operation of the diesel engine, at least one of said two or more parameters relating to the composition of the exhaust gas of the diesel engine; and using a multivariable vehicle controller to set a current set position of the turbine and/or a current set position of the EGR valve to effect a future value of at least one of the one or more sensed parameters, wherein the current set position of the turbine and/or the current set position of the EGR valve is set by the multivariable vehicle controller using as inputs the current value and one or more past values of one or more of the sensed parameters.
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33. A method for controlling a diesel engine system, wherein the diesel engine system includes a diesel engine having an intake manifold and an exhaust manifold, a turbine that is variably driven by exhaust gas received from the exhaust manifold wherein the degree the turbine is driven by the exhaust gas is set by a set position of the turbine, the turbine driving a compressor that provides compressed air to the intake manifold, the diesel engine system also includes an adjustable exhaust gas recirculation (EGR) valve that receives exhaust gas via the exhaust manifold and provides a selected amount of the exhaust gas to the intake manifold wherein the selected amount is set by a set position of the EGR valve, the method comprising the steps of:
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sensing one or more parameters related to the operation of the diesel engine, the one or more parameters not including a fueling rate set point; and using a model predictive vehicle controller to set a current set position for the turbine and a current set position for the EGR valve to effect a future value of at least one of the one or more sensed parameters, wherein the current set position(s) is/are set based on the one or more sensed parameters;
wherein the turbine includes an electric motor assist, wherein the electric motor assist has a speed set position, and wherein the setting step sets a current speed set position for the electric motor assist. - View Dependent Claims (34)
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Specification