Vehicle Torque Vector Control for High-Speed Turning Stability
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Solution Overview
Problem
Vehicles struggle to maintain stability and safety during high-speed turns due to skidding, especially under excessive load or adverse weather conditions, limiting the maximum speed for steady turning.
Innovation Solution
A power control method that activates a torque vector control function to determine dynamic load-based torque allocation ratios for each wheel, adjusting these ratios based on wheel speed and steering corrections to optimize turning performance and prevent skidding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle turns at high speed with small turning radius, then the turning performance is improved, but the vehicle stability deteriorates due to skidding
Solution Approach 1:
The patent applies local quality by differentiating torque allocation among individual wheels based on their dynamic load characteristics. Each wheel receives customized torque according to its specific load condition, allowing the vehicle to maintain stability while achieving high-speed turning performance. The inner wheels and outer wheels receive different torque allocations to prevent skidding on each side.
Solution Approach 2:
The patent implements dynamics by continuously adjusting torque allocation ratios in real-time based on changing vehicle conditions including lateral acceleration, wheel speeds, and dynamic loads. The control system dynamically modifies torque distribution to maintain optimal stability throughout the turning maneuver, adapting to the evolving mechanical state of the vehicle.
2Quantity of substance
If the vehicle is excessively loaded, then the cargo capacity is improved, but the turning stability deteriorates and skidding occurs
Solution Approach 1:
The patent applies parameter changes by modifying torque allocation parameters based on the vehicle's loading condition. When excessively loaded, the system adjusts torque distribution to account for increased mass and altered weight distribution, preventing skidding while maintaining the ability to transport heavy cargo. The torque ratios are recalculated to compensate for the reduced safety margin.
Solution Approach 2:
The patent implements preliminary action by calculating and adjusting torque allocation before skidding occurs. The system proactively compensates for the destabilizing effects of excessive loading by pre-adjusting torque distribution based on detected load conditions, preventing skidding rather than reacting after it begins.
3Adaptability or versatility
If the road condition or weather is relatively bad, then the vehicle can operate in adverse environments, but the wheel skidding increases and safety deteriorates
Solution Approach 1:
The patent applies feedback by continuously monitoring wheel speeds, lateral acceleration, and vehicle dynamics, then using this information to adjust torque allocation in real-time. This closed-loop control enables the system to adapt to bad road conditions and weather by responding to actual vehicle behavior, maintaining safety despite environmental challenges.
Solution Approach 2:
The patent implements parameter changes by adjusting torque allocation parameters based on environmental conditions detected through sensor feedback. When operating in adverse environments, the system modifies torque distribution parameters to account for reduced traction, preventing skidding while maintaining the ability to operate in diverse conditions.
4Stability of the object's composition
If torque vector control is activated with dynamic load-based allocation, then the lateral acceleration interval is extended, but the control system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the torque control into discrete wheel-level allocations based on dynamic load characteristics. Each wheel's torque is independently calculated and controlled, allowing precise stability management while using modular calculation methods that manage computational complexity through systematic breakdown of the control problem.
Data Source
AI summary
A vehicle power control method includes: when a torque vector control function is activated, determining a first torque allocation ratio of a corresponding wheel; and determining a first allocation torque of each wheel according to a vehicle required torque and the first torque allocation ratio of the corresponding wheel. When each wheel is driven according to the first allocation torque and a steering wheel rotation angle is set to an angle, mapping a turning radius and a lateral acceleration as a first curve, and an integral of the first curve over a lateral acceleration interval is a first area. When the torque vector control function is inactivated and the steering wheel rotation angle turns according to the angle, mapping a turning radius and a lateral acceleration as a second curve, an integral of the second curve over the lateral acceleration interval is a second area.