System, method, and apparatus for controlling power output distribution in a hybrid power train
First Claim
1. A method, comprising:
- determining a machine shaft torque demand and a machine shaft speed of a hybrid powertrain for a vehicle, the hybrid powertrain including an internal combustion engine, a first electrical torque provider, and a second electrical torque provider, the hybrid powertrain farther including an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider, and the vehicle further comprising accessories for operating with the vehicle;
based on the machine shaft torque demand and the machine shaft speed, determining a machine power demand for the hybrid powertrain;
determining a baseline power division description for the hybrid powertrain based on a speed of the vehicle and the machine power demand, wherein determining the baseline power division description comprises determining a total electrical contribution, a total engine contribution, and a net power flux to at least one of the electrical power storage device and the accessories, wherein the total electrical contribution, the total engine contribution, and the net power flux combine to provide the machine power demand; and
operating the internal combustion engine, the first electrical torque provider, the second electrical torque provider, the electrical energy storage device and the accessories based on the baseline power division description to provide the machine power demand, wherein operating the internal combustion engine, the first electrical torque provider and the second electrical torque provider includes switching the configuration of the hybrid powertrain into a parallel configuration in response to the machine power demand being greater than a parallel power threshold and switching the hybrid powertrain into a series configuration in response to the machine power demand being negative and the machine shaft speed being below an engine stall threshold value.
1 Assignment
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Accused Products
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.
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Citations
20 Claims
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1. A method, comprising:
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determining a machine shaft torque demand and a machine shaft speed of a hybrid powertrain for a vehicle, the hybrid powertrain including an internal combustion engine, a first electrical torque provider, and a second electrical torque provider, the hybrid powertrain farther including an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider, and the vehicle further comprising accessories for operating with the vehicle; based on the machine shaft torque demand and the machine shaft speed, determining a machine power demand for the hybrid powertrain; determining a baseline power division description for the hybrid powertrain based on a speed of the vehicle and the machine power demand, wherein determining the baseline power division description comprises determining a total electrical contribution, a total engine contribution, and a net power flux to at least one of the electrical power storage device and the accessories, wherein the total electrical contribution, the total engine contribution, and the net power flux combine to provide the machine power demand; and operating the internal combustion engine, the first electrical torque provider, the second electrical torque provider, the electrical energy storage device and the accessories based on the baseline power division description to provide the machine power demand, wherein operating the internal combustion engine, the first electrical torque provider and the second electrical torque provider includes switching the configuration of the hybrid powertrain into a parallel configuration in response to the machine power demand being greater than a parallel power threshold and switching the hybrid powertrain into a series configuration in response to the machine power demand being negative and the machine shaft speed being below an engine stall threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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determining a machine shaft torque demand and a machine shaft speed, of a hybrid powertrain for a vehicle, the hybrid powertrain including an internal combustion engine, a first electrical torque provider, and a second electrical torque provider, the hybrid powertrain further including an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider, the vehicle further comprising accessories for operating with the vehicle; based, on the machine shaft torque demand and the machine shaft speed, determining a machine power demand for the hybrid powertrain; determining a baseline power division description for the hybrid powertrain based on a vehicle speed and the machine power demand, wherein determining the baseline power division description comprises determining a power contribution for each of the internal combustion engine, the first electrical torque provider, the second electrical torque provider, and a net power flux to at least one of the electrical energy storage device and the accessories, wherein the total of the power contributions and the net power flux provide the machine power demand; and operating the internal combustion engine, the first electrical torque provider, the second electrical torque provider, the electrical energy storage device and the accessories based on the baseline power division description to provide the machine power demand, wherein operating the internal combustion engine, the first electrical torque provider and the second electrical torque provider includes switching the configuration of the hybrid powertrain into a parallel configuration in response to the machine power demand being greater than a parallel power threshold and switching the hybrid powertrain into a series configuration in response to the machine power demand being negative and the machine shaft speed being below an engine stall threshold value. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method, comprising:
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determining a machine shaft torque demand and a machine shaft speed of a hybrid powertrain for a vehicle, the hybrid powertrain including an internal combustion engine, a first electrical torque provider, a second electrical torque provider, and an electrical energy storage device connected to the first and second electrical torque providers; based on the machine shaft torque demand and the machine shaft speed, determining a machine power demand for the hybrid powertrain; determining a baseline power division description for the hybrid powertrain based on a speed of the vehicle and the machine power demand; determining a state-of-charge (SOC) deviation for the electrical energy storage device, wherein the electrical energy storage device is electrically coupled to the first electrical torque provider and the second electrical torque provider; determining a net power flux to the electrical energy storage device based on the SOC deviation; adjusting the baseline power division description based on the SOC deviation and the net power flux; and operating the internal combustion engine, the first electrical torque provider, the second electrical torque provider, and the electrical energy storage device based on the adjusted baseline power division description to provide the machine power demand, wherein operating the internal combustion engine, the first electrical torque provider and the second electrical torque provider includes switching the configuration of the hybrid powertrain into a parallel configuration in response to the machine power demand being greater than a parallel power threshold and switching the hybrid powertrain into a series configuration in response to the machine power demand being negative and the machine shaft speed being below an engine stall threshold value. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification