System, method, and apparatus for controlling power output distribution in a hybrid power train
First Claim
1. A system, comprising:
- a hybrid power train comprising an internal combustion engine and an electrical system, the electrical system including a first electrical torque provider, a second electrical torque provider, and an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider;
a clutch positioned with the first electrical torque provider and a load on a first side of the clutch and with the internal combustion engine and the second electrical torque provider on a second side of the clutch, wherein the clutch in a closed position provides the hybrid power train in a parallel configuration and wherein the clutch in an open position provides the hybrid power train in a series configuration;
a controller structured to perform operations including;
determining a power surplus value of the electrical system;
determining a machine power demand change value;
in response to the power surplus value of the electrical system being greater than or equal to the machine power demand change value, operating the hybrid power train in the series configuration and operating an optimum cost controller to determine a power division description for the internal combustion engine, the first electrical torque provider, and the second electrical torque provider, wherein the controller is configured to operate the optimum cost controller to;
incrementally change in a first direction a power provided by the engine in a first execution cycle in response to the power division description;
determining whether the power incrementally changed in the first execution cycle improved a power cost value;
in response to an improved power cost value, continue incrementing the power division description in the first direction in a next execution cycle;
in response to a degrading power cost value, switching a direction of the increment of the power division description in the next execution cycle; and
in response to the power surplus value of the electrical system being less than the machine power demand change value, operating the hybrid power train in the parallel configuration and operating a rule-based controller to determine the power division for the internal combustion engine, the first electrical torque provider, and the second electrical torque provider.
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Abstract
A system includes a hybrid power train comprising an internal combustion engine and electrical system, which includes a first and second electrical torque provider, and an electrical energy storage device electrically coupled to first and second electrical torque provider. The system further includes a controller structured to perform operations including determining a power surplus value of the electrical system; determining a machine power demand change value; in response to the power surplus value of the electrical system being greater than or equal to the machine power demand change value, operating an optimum cost controller to determine a power division for the engine, first electrical torque provider, and second electrical torque provider; and in response to the power surplus value of the electrical system being less than the machine power demand change value, operating a rule-based controller to determine the power division for the engine, first, and second electrical torque provider.
143 Citations
30 Claims
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1. A system, comprising:
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a hybrid power train comprising an internal combustion engine and an electrical system, the electrical system including a first electrical torque provider, a second electrical torque provider, and an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider; a clutch positioned with the first electrical torque provider and a load on a first side of the clutch and with the internal combustion engine and the second electrical torque provider on a second side of the clutch, wherein the clutch in a closed position provides the hybrid power train in a parallel configuration and wherein the clutch in an open position provides the hybrid power train in a series configuration; a controller structured to perform operations including; determining a power surplus value of the electrical system; determining a machine power demand change value; in response to the power surplus value of the electrical system being greater than or equal to the machine power demand change value, operating the hybrid power train in the series configuration and operating an optimum cost controller to determine a power division description for the internal combustion engine, the first electrical torque provider, and the second electrical torque provider, wherein the controller is configured to operate the optimum cost controller to; incrementally change in a first direction a power provided by the engine in a first execution cycle in response to the power division description; determining whether the power incrementally changed in the first execution cycle improved a power cost value; in response to an improved power cost value, continue incrementing the power division description in the first direction in a next execution cycle; in response to a degrading power cost value, switching a direction of the increment of the power division description in the next execution cycle; and in response to the power surplus value of the electrical system being less than the machine power demand change value, operating the hybrid power train in the parallel configuration and operating a rule-based controller to determine the power division for the internal combustion engine, the first electrical torque provider, and the second electrical torque provider. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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operating a hybrid power train including an engine, a first electrical torque provider, a second electrical torque provider, and an electrical system comprising a portion of the hybrid power train, and further comprising a clutch positioned with the first electrical torque provider and a load on a first side of the clutch and with the internal combustion engine and the second electrical torque provider on a second side of the clutch, wherein the clutch in a closed position provides the hybrid power train in a parallel configuration and wherein the clutch in an open position provides the hybrid power train in a series configuration; determining a power surplus value of the electrical system; determining a machine power demand change value of the hybrid power train; in response to the power surplus value being greater than or equal to the machine power demand change value, operating the hybrid power train in the series configuration and operating an optimum cost controller to determine a power division description for the hybrid power train in the series configuration, wherein operating the optimum cost controller includes; incrementally changing in a first direction reaction a power provided by the engine in a first execution cycle in response to the power division description; determining whether the power incrementally changed in the first execution cycle improved a power cost value; in response to an improved power cost value, continue incrementing the power division description in the first direction in a next execution cycle; in response to a degrading power cost value, switching a direction of the increment of the power division description in the next execution cycle; and in response to the power surplus value of the electrical system being less than the machine power demand change value, operating the hybrid powertrain in a parallel configuration and operating a rule-based controller to determine the power division for the hybrid power train in the parallel configuration. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification