Vehicle stability control method and system for active aerodynamic assist control

Abstract

The invention relates to a vehicle stability control system for active aerodynamic auxiliary control, which adopts an aerodynamic method to generate auxiliary aerodynamic force and yaw moment acting on the vehicle body. When the vehicle speed is greater than or equal to 80Km / h, the stability control system judges the driver's driving intention according to the steering wheel angle, accelerator pedal position, and brake master cylinder pressure input by the driver, and according to the yaw rate, Lateral acceleration, to judge the real driving conditions of the vehicle, the difference in air resistance generated by actively changing the frontal area of ​​the left and right sides of the vehicle by adjusting the opening of the active wind flap directly constitutes the auxiliary aerodynamic yaw moment, and at the same time through the The left and right side drive braking force control of the vehicle is used to control the vehicle so that the driving condition of the vehicle is as close as possible to the driver's driving intention.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a vehicle stability control method and system for active aerodynamic auxiliary control. Background technique [0002] The traditional vehicle stability control system (ESP) mainly works under the extreme conditions of large lateral acceleration and large slip angle, and uses the yaw moment generated by the difference between the braking forces on the left and right sides to prevent uncontrollable sideslip Phenomena, such as the driving out phenomenon in which the path tracking ability is lost due to the side slip of the front axle when driving in a curve, and the sharp rotation phenomenon in which the rear axle loses stability due to the side slip and flick of the rear axle. [0003] ESP mainly controls the movement of the car under extreme conditions, so that the driver can smoothly pass through the dangerous conditions that are difficult to control according to the normal driv...

AI Technical Summary

Problems solved by technology

[0004] The traditional vehicle stability control system mainly realizes the vehicle control by controlling the tire force, which is affected by the vertical load of the tire and the road surface adhesion coefficient. H driving or driving at a speed greater than or equal to 80Km / h under the condition of severe oversteering of the vehicle) may work in a saturated state (that is, the tire force required for stability control exceeds the limit value that the tire can provide), so its control effect needs to be further improved improve

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