Vehicle stability control method and system

Abstract

The present invention provides a vehicle stability control method and system. The vehicle stability control method includes: when the vehicle stability control system is in an active state, obtaining the lateral offset of the center of mass; when the absolute value of the lateral offset of the center of mass is greater than the first When the threshold is reached, adjust the damping force of the shock absorbers on the left and right sides of the vehicle according to the lateral offset of the center of mass and the current pressure difference between the left and right wheels; when the absolute value of the lateral offset of the center of mass is less than or when it is equal to the first threshold, obtain the steering wheel angle; when the absolute value of the steering wheel angle is greater than the preset angle, adjust the left and right sides of the vehicle according to the steering wheel angle, vehicle speed, and the current pressure difference between the left wheel pressure and the right wheel pressure. The damping force of the shock absorbers on both sides. The invention improves the steering comfort of the vehicle by changing the damping force of the shock absorber at each wheel, ensures stable and comfortable steering driving of the vehicle, and effectively prevents the vehicle from rolling over.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle stability control method and system. Background technique [0002] In the current market, there are mainly two methods for vehicle stability control. One is to install equipment such as anti-roll bars on the vehicle body, and the other is to reduce the vehicle torque and adjust the braking force of the left and right wheels to maintain the stability of the vehicle body. To achieve the purpose of preventing the vehicle from rolling over. However, by reducing the vehicle torque and adjusting the braking force of the left and right wheels, although the instability of the vehicle can be avoided to a certain extent, the dynamic performance of the vehicle is reduced due to the reduction of the torque and the application of the braking force, resulting in the driver's driving The experience is also reduced. However, the method of installing anti-roll bars and other equip...

AI Technical Summary

Problems solved by technology

However, by reducing the vehicle torque and adjusting the braking force of the left and right wheels, although the instability of the vehicle can be avoided to a certain extent, the dynamic performance of the vehicle is reduced due to the reduction of the torque and the application of the braking force, resulting in the driver's driving The experience is also reduced

However, the method of installing anti-roll bars and other equipment on the vehicle body is only applicable to specific environments

[0003] The existing technology basically can only provide certain protection when the vehicle is laterally unstable, but it is impossible to avoid the excessive forward or backward movement of the vehicle's center of mass during rapid acceleration or rapid deceleration, so that it is impossible to avoid the situation where the driver loses balance due to inertia , increasing the risk of accidents

[0004] In the prior art, the judgment of vehicle instability is based on the vehicle acceleration or deceleration sensor to estimate the body posture, which cannot accurately and timely judge the body posture

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