Automobile brake control method for improving lateral stability of turning/braking vehicles

Abstract

The invention relates to a method for improving lateral stability under the condition of turning/braking vehicles, in particular to an automobile brake control method for improving lateral stability of turning/braking vehicles. By an off-line simulation method, from the angle of whole-vehicle dynamics, based on optimization technology, the invention calibrates an optimal target slip-rate working interval of an automobile ABS system comprehensively considering both longitudinal braking performance and lateral braking performance under the turning/braking condition, forms a curved surface from target slip rate to steering angle to initial braking speed, and then supplies the target slip rate for dynamically adjusting wheels inside and outside a bend to an online ABS system. The online ABS system adjusts the pressure of a braking wheel cylinder to reasonably allocate longitudinal force and lateral force that every wheel bears when a vehicle turns/brakes so as to improve the lateral stability of the vehicle. On the basis of the prior ABS system, the method has the advantage of allowing the ABS system to have part of the functions of an ESP system without increasing any cost.

Description

Technical field: [0001] The invention relates to a method for improving the lateral stability of a vehicle under turning braking conditions, in particular to an automobile braking control method for improving the lateral stability of the vehicle turning braking. Background technique: [0002] Safety, environmental protection, and energy saving are the three major themes of the development of the world today, and they are also the development direction of modern automobiles. Among them, in terms of "safety" of the car, the car braking system plays a vital role. In recent years, with the development of expressways, the improvement of vehicle speed, the gradual increase of traffic density and the trend of non-professional drivers, this importance has become more and more obvious. [0003] The braking process of a car is a complex process of strong nonlinearity, and applying the brakes when driving on a curve is a dangerous operation, because when the brakes are applied when dr...

AI Technical Summary

Problems solved by technology

[0005] As we all know, the ABS system only works when the driver brakes. If you want to improve the ABS system to partially replace the role of the ESP system, you need to analyze the proportion of whether the driver brakes in the driving conditions where the ESP works. If In these working conditions, the proportion of braking is low, ABS cannot work, and only the ESP system works, so improving ABS to improve vehicle stability will play a very limited role in improving traffic safety

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