METHOD FOR MANAGING ELECTRIC POWER WITHIN A POWERTRAIN SYSTEM
First Claim
1. Method for controlling a powertrain system including a first power actuator, a second power actuator, a transmission device and an energy storage device coupled to one of the first power actuator and the second power actuator, the transmission device operative to transfer power between an output member, and the first and second power actuators, the method comprising:
- monitoring output power of the energy storage device;
providing a short term electric power limit, a long term electric power limit, a preferred electric power limit, and a trigger electric power limit for the operation of the energy storage device, said preferred electric power limit defining a preferred power range;
modifying the preferred electric power limit when the output power of the energy storage device transgresses the trigger electric power limit;
monitoring a power command to the first power actuator;
estimating an output power of the energy storage device for the power command;
determining a power constraint of the first power actuator based on the long term electric power limit when the power of the energy storage device is within the preferred power range; and
determining a power constraint of the first power actuator based on the estimated output power of the energy storage device when the output power of the energy storage device transgresses the preferred electric power limit.
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Accused Products
Abstract
A method for controlling a powertrain system includes monitoring output power of the energy storage device, modifying a preferred electric power limit when the output power of the energy storage device transgresses a trigger power limit, and determining the power constraint of the first power actuator based on the estimated output power of the energy storage device when the output power of the energy storage power transgresses the preferred power limit.
305 Citations
20 Claims
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1. Method for controlling a powertrain system including a first power actuator, a second power actuator, a transmission device and an energy storage device coupled to one of the first power actuator and the second power actuator, the transmission device operative to transfer power between an output member, and the first and second power actuators, the method comprising:
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monitoring output power of the energy storage device; providing a short term electric power limit, a long term electric power limit, a preferred electric power limit, and a trigger electric power limit for the operation of the energy storage device, said preferred electric power limit defining a preferred power range; modifying the preferred electric power limit when the output power of the energy storage device transgresses the trigger electric power limit; monitoring a power command to the first power actuator; estimating an output power of the energy storage device for the power command; determining a power constraint of the first power actuator based on the long term electric power limit when the power of the energy storage device is within the preferred power range; and determining a power constraint of the first power actuator based on the estimated output power of the energy storage device when the output power of the energy storage device transgresses the preferred electric power limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Method for controlling a powertrain system including an engine, an electric machine, a transmission device, and an energy storage device coupled to the electric machine, the transmission device operative to transfer power among an output member, the engine and the electric machine, the method comprising:
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monitoring output power of the energy storage device; providing a short term electric power limit, a long term electric power limit, a preferred electric power limit, and a trigger electric power limit for the energy storage device, said preferred electric power limit defining a preferred power range; modifying the preferred electric power limits when the output power of the energy storage device transgresses the trigger electric power limit; monitoring a power command to the engine; estimating an output power of the energy storage device for the power command; determining a power constraint of the engine based on the long-term electric power limit when the output power of the energy storage device is within the preferred power range; and determining a power constraint of the engine based on the estimated output power of the energy storage device when the output power of the energy storage device transgresses the preferred electric power limit. - View Dependent Claims (15, 16, 17)
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18. Method for controlling a powertrain system including an engine, an electric machine, a transmission device, and an energy storage device coupled to the electric machine, the transmission device operative to transfer power among an output member, the engine and the electric machine, the method comprising:
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monitoring output power of the energy storage device; providing short term electric power limits, long term electric power limits, preferred electric power limits, and trigger electric power limits for the energy storage device, said preferred electric power limits defining a preferred power range; modifying the preferred electric power limits when the output power of the energy storage device transgresses a trigger power limit; monitoring a power request to the electric machine; estimating an output power of the energy storage device for the power command; determining power constraints for constraining power of the electric machine based on the long-term electric power limits when the output power of the energy storage device is within the preferred power range; determining power constraints for constraining power of the electric machine based on the estimated output power of the energy storage device when the output power of the energy storage power transgresses a preferred electric power limit. - View Dependent Claims (19, 20)
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Specification