Control system for an all-wheel drive electric vehicle
First Claim
1. An electric vehicle drive system comprising:
- first and second electric motors;
a torque split unit configured to receive first input that includes at least a total torque request for the first and second electric motors, and respective first and second maximum torques for the first and second electric motors, the torque split unit configured to process the first input without taking into account wheel slip, and to generate at least respective first and second torque requests for the first and second electric motors; and
a traction and stability control unit configured to receive second input that includes at least the first and second torque requests, the total torque request, and respective first and second slip errors relating to the first and second electric motors, the traction and stability control unit configured to process the second input and to generate respective first and second torque commands for the first and second electric motors.
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Accused Products
Abstract
Electric vehicles and, more particularly, a control system for an all-wheel drive electric vehicle. An electric vehicle drive system comprises: first and second electric motors; a torque split unit configured to receive first input that includes at least a total torque request for the first and second electric motors, and respective first and second maximum torques for the first and second electric motors, the torque split unit configured to process the first input without taking into account wheel slip, and to generate at least respective first and second torque requests for the first and second electric motors; and a traction and stability control unit configured to receive second input that includes at least the first and second torque requests, the total torque request, a computed vehicle speed, and respective first and second slip errors relating to the first and second electric motors, the traction and stability control unit configured to process the second input and to generate respective first and second torque commands for the first and second electric motors.
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Citations
22 Claims
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1. An electric vehicle drive system comprising:
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first and second electric motors; a torque split unit configured to receive first input that includes at least a total torque request for the first and second electric motors, and respective first and second maximum torques for the first and second electric motors, the torque split unit configured to process the first input without taking into account wheel slip, and to generate at least respective first and second torque requests for the first and second electric motors; and a traction and stability control unit configured to receive second input that includes at least the first and second torque requests, the total torque request, and respective first and second slip errors relating to the first and second electric motors, the traction and stability control unit configured to process the second input and to generate respective first and second torque commands for the first and second electric motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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receiving first input that includes at least a total torque request for first and second electric motors of an electric vehicle, and respective first and second maximum torques for the first and second electric motors; generating, based on the first input and without taking into account wheel slip, at least respective first and second torque requests for the first and second electric motors; receiving second input that includes at least respective first and second slip errors relating to the first and second electric motors; generating, based on the second input, respective first and second torque commands for the first and second electric motors; and applying the respective first and second torque commands for the first and second electric motors. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification