Vehicle unstability control method, vehicle unstability control device and vehicle

Abstract

The invention discloses a vehicle unstability control method, a vehicle unstability control device and a vehicle. Wheel-side motors are arranged for each wheel in the vehicle. The method comprises thefollowing steps of judging whether the vehicle is in the unstable state or not, wherein the unstable state comprises the understeering state and the oversteering state; when the vehicle is in the understeering state, controlling the vehicle through the wheel-side motors to increase driving force of the wheels at the outer side, reduce driving force of the wheels at the inner side, and increase brake force of the wheels at the inner side; when the vehicle is in the oversteering state, controlling the vehicle through the wheel-side motors to increase the driving force of the wheels at the innerside, reduce the driving force of the wheels at the outer side, and increase the brake force of the wheels at the outer side. Thus, by conducting stepwise control on the wheel-side motors, the brakeforce is gradually strengthened, so that the vehicle more quickly and stably makes turns, the safety and dynamic performance are guaranteed, and the limiting speed, capable of being processed, of thevehicle unstability is higher.

Description

Technical field [0001] The present invention relates to the technical field of automobiles, in particular to a vehicle instability control method, a vehicle instability control device and a vehicle with the device. Background technique [0002] Generally, when a vehicle is turning, two types of instability may occur. One is due to insufficient adhesion of the rear wheels to the ground, and the vehicle flicks its tail, resulting in oversteer; the other is due to insufficient adhesion of the front wheels to the ground and the front of the vehicle is thrown out, causing Understeer. [0003] At present, in the face of the above two instability situations, it is generally to detect the condition of the vehicle based on the signal of the sensor, and then control the torque output of the engine and the brake hydraulic pressure of each wheel according to the condition of the vehicle. When the steering is insufficient, the inner rear wheel Being braked; when oversteer, the outer front whee...

AI Technical Summary

Problems solved by technology

However, when the vehicle is unstable, the unstable state of the vehicle is alleviated by reducing the torque and controlling the braking of the vehicle, so the power loss of the vehicle is very large, and the friction plate is seriously worn.

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