Automobile four-wheel active steering control system

Abstract

The invention discloses an automobile four-wheel active steering control system which comprises a driver preset steering detecting device, an actual steering detecting device and an electronic control unit, wherein the driver preset steering detecting device is used for detecting the preset steering state of the driver in real time; the actual steering detecting device is used for detecting the actual steering state of the automobile in real time; the electronic control unit is used for analyzing and comparing detected signals of the driver preset steering detecting device and the actual steering detecting device and correspondingly controlling a front wheel steering controller and a rear wheel steering controller; and the driver preset steering detecting device and the actual steering detecting device are both connected with the electronic control unit. The automobile four-wheel active steering control system has reasonable design, is easy and convenient to use and operate and can effectively improve the controllability problem of the four-wheel steering automobile during turning, thereby greatly improving the safety of the automobile during meeting, overtaking and curve running.

Description

technical field [0001] The invention relates to the technical field of automobile steering control, in particular to an automobile four-wheel active steering steering control system suitable for automobiles whose front and rear wheels can actively steer, that is, four-wheel steering automobiles. Background technique [0002] The maneuverability of the car refers to the ability of the car to follow the direction given by the driver through the steering gear and the steering wheel, that is, the ability to maintain a straight line or turn according to a given radius curve. Poor or loss of maneuverability will lead to Dangers such as car skidding, sharp rotation or even overturning occur. [0003] During the high-speed steering process of the car, due to the limitation of road surface friction conditions, the driver cannot accurately control the steering of the vehicle or the vehicle cannot respond accurately and quickly to the driver's instructions, resulting in sideslip or dev...

AI Technical Summary

Problems solved by technology

When the lateral force on the front axle is saturated and reaches the friction limit, the vehicle will "drift" and the turning radius will be larger than the driver expects, making it difficult for the vehicle to follow the expected trajectory

When the lateral force on the rear axle is saturated and reaches the friction limit, the vehicle will "spin" phenomenon. At this time, the turning radius is smaller than the driver's expectation, and the vehicle body has a large side slip angle, which will gradually lose stability. It is difficult for the driver to control the vehicle, which is extremely dangerous for vehicles that are not equipped with active steering control systems

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