Yaw stability control method based on tire pressure

Abstract

The invention discloses a yaw stability control method based on vehicle tire pressure. The method comprises the steps that the theoretical yaw acceleration alpha (k), the actual transverse acceleration alpha act and the movement speed at the vehicle mass center of a vehicle are obtained; a deviation value delta alpha (k) of the current vehicle steering state is obtained based on the theoretical yaw acceleration alpha (k) and the actual transverse acceleration alpha act; acquiring a yaw critical value e based on the movement speed at the vehicle mass center; and the target tire pressure and the tire pressure adjusting inflation and deflation speed are obtained based on the deviation value delta alpha (k) of the current vehicle steering state and the yaw critical value e. According to the invention, the peak transverse adhesion coefficient of the tire and the road surface can be quickly improved, transverse stability control of the vehicle is realized, and the dynamic property of the vehicle is not influenced.

Description

technical field [0001] The invention discloses a yaw stability control method, which belongs to the technical field of vehicle control, and specifically discloses a yaw stability control method based on vehicle tire pressure. Background technique [0002] When an understeer or oversteer problem may occur during the turning process of the vehicle, the existing technical solution is to adjust the motion state of the vehicle by applying a braking torque to the vehicle to generate an additional yaw torque, thereby alleviating this problem. There is following shortcoming in above-mentioned technical scheme: [0003] ①The driver does not actively step on the brake pedal, but the vehicle automatically applies a sudden braking force, which affects the continuity of the vehicle's power output and causes the driver to feel the shock of a sudden change in acceleration; [0004] ②The driver does not actively step on the brake pedal, but the vehicle automatically applies a sudden brakin...

AI Technical Summary

Problems solved by technology

[0003] ①The driver does not actively step on the brake pedal, but the vehicle automatically applies a sudden braking force, which affects the continuity of the vehicle's power output and causes the driver to feel the shock of a sudden change in acceleration;

[0004] ②The driver does not actively step on the brake pedal, but the vehicle automatically applies a sudden braking force, causing the vehicle to suddenly decelerate abnormally. Due to the lack of professional knowledge of the car, ordinary public drivers mistakenly believe that the power system of the car is faulty, causing them to complain Vehicle Powertrain Safety Concerns

[0005] ③This technical solution fails to fully explore and improve the peak lateral adhesion coefficient between the tire and the road surface, and improve the lateral stability of the vehicle

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