Vehicle and method for controlling power to wheels in a vehicle
First Claim
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1. A method for controlling power to wheels in a vehicle, the vehicle having an electric storage device for providing power to an electric machine, the method comprising:
- determining a driver power demand for the vehicle;
determining an electrical power loss for the vehicle;
adding the electrical power loss to the driver power demand, thereby generating a first power demand;
determining a second power demand by setting the second power demand equal to the first power demand minus the electrical power loss when the magnitude of the first power demand is not greater than a predetermined value, and setting the second power demand equal to the predetermined value minus the electrical power loss when the magnitude of the first power demand is greater than the predetermined value;
determining a power adjustment based on at least one condition of the electric storage device; and
applying the power adjustment to the second power demand, thereby generating a wheel power request.
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Abstract
A method for controlling power to wheels in a vehicle, the vehicle having an electric storage device for providing power to an electric machine. The method includes determining a first power demand for the vehicle based at least in part on a driver input, determining a second power demand based at least in part on the magnitude of the first power demand, determining a power adjustment based on at least one condition of the battery, and applying the power adjustment to the second power demand, thereby generating a wheel power request.
20 Citations
18 Claims
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1. A method for controlling power to wheels in a vehicle, the vehicle having an electric storage device for providing power to an electric machine, the method comprising:
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determining a driver power demand for the vehicle; determining an electrical power loss for the vehicle; adding the electrical power loss to the driver power demand, thereby generating a first power demand; determining a second power demand by setting the second power demand equal to the first power demand minus the electrical power loss when the magnitude of the first power demand is not greater than a predetermined value, and setting the second power demand equal to the predetermined value minus the electrical power loss when the magnitude of the first power demand is greater than the predetermined value; determining a power adjustment based on at least one condition of the electric storage device; and applying the power adjustment to the second power demand, thereby generating a wheel power request. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for controlling power to wheels in a vehicle, the vehicle having an electric storage device for providing power to an electric machine, the method comprising:
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determining a driver power demand for the vehicle; increasing the driver power demand by an electrical loss for the vehicle, thereby generating a first power demand; applying a limiting function to the first power demand such that the first power demand is not allowed to exceed a predetermined value, thereby generating an intermediate power demand; decreasing the intermediate power demand by the electrical loss, thereby generating a second power demand; determining a power adjustment based on at least one condition of the electric storage device; and applying the power adjustment to the second power demand, thereby generating a wheel power request. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A vehicle, comprising:
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an electric machine configured to supply torque to propel the vehicle; an electric storage device including a battery and capable of supplying power to the electric machine; and a control system including at least one controller configured to; determine a first power demand for the vehicle based at least in part on a driver input, determine a second power demand based at least in part on the magnitude of the first power demand, determine a reference discharge voltage for the battery, receive inputs related to a measured discharge voltage for the battery and a measured current draw for the battery, determine a power adjustment based at least in part on the reference discharge voltage, the measured discharge voltage, and the measured current draw, and apply the power adjustment to the second power demand, thereby generating a wheel power request. - View Dependent Claims (16, 17)
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18. A method for controlling power to wheels in a vehicle, the vehicle having an electric storage device for providing power to an electric machine, the method comprising:
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determining a power demand for the vehicle based at least in part on a driver input; determining a power adjustment based on at least one condition of the electric storage device; and applying the power adjustment to the power demand, thereby generating a wheel power request, wherein determining the power adjustment comprises determining a voltage error defined as a difference between a reference discharge voltage and a measured discharge voltage, determining a voltage adjustment based at least in part on the sign of the voltage error, and determining a power demand modifier defined as a product of the voltage adjustment and a battery current.
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Specification