Drift driving control method and system of electronic limited slip differential
AssigneeHyundai Wia Corporation
InventorHyeok Hun Song
Life of this patent
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Abstract
A drift driving control method and system of an electronic limited slip differential (e-LSD). The method and the system enable drift driving by controlling an e-LSD differential when drift driving is intended by a driver. Whether or not drift mode conditions are met on the basis of a driver's vehicle operating state and an output value reflecting a driving state of a vehicle is determined. When the drift mode conditions are met, control is performed so that drift driving is performed by causing the vehicle to be oversteered by increasing driving force of a turning outer wheel using the electronic limited slip differential and then maintaining simultaneous slipping of right and left wheels.
Claims11
A drift driving control method of an electronic limited slip differential, the method comprising:
- determining, by a controller, whether or not drift mode conditions are met on the basis of a driver's vehicle operating state or an output value reflecting a driving state of a vehicle;
- and
- when the drift mode conditions are met, controlling, by the controller, drift driving to be performed by causing the vehicle to be oversteered by increasing driving force of a turning outer wheel using the electronic limited slip differential and then maintaining simultaneous slipping of right and left wheels, one of which corresponds to the turning outer wheel,
- wherein a drift mode is categorized as a drift entrance mode and a drift maintaining mode,
- wherein drift entrance torque for causing the oversteering in the vehicle is applied by means of the electronic limited slip differential in the drift entrance mode, and
- drift maintaining torque for maintaining simultaneous slipping of the right and left wheels is applied by means of the electronic limited slip differential in the drift maintaining mode, and
- wherein the drift entrance torque and the drift maintaining torque are applied by limiting gradients thereof.
A drift driving control method of an electronic limited slip differential, the method comprising:
- determining, by a controller, whether or not drift mode conditions are met on the basis of a driver's vehicle operating state or an output value reflecting a driving state of a vehicle;
- and
- when the drift mode conditions are met, controlling, by the controller, drift driving to be performed by causing the vehicle to be oversteered by increasing driving force of a turning outer wheel using the electronic limited slip differential and then maintaining simultaneous slipping of right and left wheels, one of which corresponds to the turning outer wheel,
- wherein a drift mode is categorized as a drift entrance mode and a drift maintaining mode,
- wherein when the drift mode conditions based on a driving mode, a steering state, a brake operating state, an accelerator opening degree, or a difference between an average front wheel speed and an average rear wheel speed of the vehicle are met, the drift entered mode is entered, and
- wherein, when the drift mode conditions based on the difference between the average front wheel speed and the average rear wheel speed and the accelerator opening degree is not met, cancellation of the drift mode is delayed for a predetermined time.
A drift driving control method of an electronic limited slip differential, the method comprising:
- determining, by a controller, whether or not drift mode conditions are met on the basis of a driver's vehicle operating state or an output value reflecting a driving state of a vehicle;
- and
- when the drift mode conditions are met, controlling, by the controller, drift driving to be performed by causing the vehicle to be oversteered by increasing driving force of a turning outer wheel using the electronic limited slip differential and then maintaining simultaneous slipping of right and left wheels, one of which corresponds to the turning outer wheel,
- wherein a drift mode is categorized as a drift entrance mode and a drift maintaining mode,
- wherein drift entrance torque for causing the oversteering in the vehicle is applied by means of the electronic limited slip differential in the drift entrance mode, and
- drift maintaining torque for maintaining simultaneous slipping of the right and left wheels is applied by means of the electronic limited slip differential in the drift maintaining mode, and
- wherein the drift maintaining torque is determined by a maximum value of the driving force input to the electronic limited slip differential and allowable driving force of the turning outer wheel, lateral acceleration, and a yaw rate error.
Dependencies are inferred from the claim text.