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Self-adaptive ABS control method

A control method and self-adaptive technology, applied in the direction of the brake, etc., to achieve good adaptability, reduce gaps and defects, and smooth transition

Active Publication Date: 2008-06-18
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is mainly to overcome the deficiencies of the prior art, provide an adaptive ABS control method, improve the adaptability to road conditions, eliminate hidden dangers and control defects caused by changes in road conditions, and improve the ABS control method. security of control

Method used

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Embodiment Construction

[0021] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0022] The ABS controller in this example is based on the Motorola Freescale 16-bit microcontroller MC68HC12D64 to achieve adaptive control. The main technical problems to be solved are: 1) Improve the reliability of the ABS controller. Changed the traditional ABS in the complicated conditions of smooth road, road obstacles, complex rough road, road switching, etc. due to wrong judgment and wrong control mode selection, resulting in control failure; 2) Improved the adaptability of ABS controller. The situation that traditional ABS is likely to cause incorrect ABS judgment and control failure when the vehicle load distribution changes is changed; 3) The comfort of the ABS controller is improved. The control mode is simplified, making it more comfortable in situations such as switching between roads and complex roads.

[0023] Based on ...

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Abstract

The invention discloses a self-adaptive ABS control method for the real-time monitoring of wheel speed. According to the related parameters collection of wheel speed calculation, the speed, slip ratio and acceleration values are included. The brake valve switching parameters are obtained in accordance with the relevant parameters, so that the four-wheel brake pressure regulation and the anti-lock braking function are achieved. Because the control strategy is used, the control chaos and failure caused by the frequent switching of control modes as a result of the road changing or the objects such as obstacles are avoided. A closed-loop control in the control process is formed with excellent robustness, which is not sensitive for the changes in speed caused by the mutations of road conditions. Therefore the anti-interference performance is excellent with high reliability and good adaptability.

Description

【Technical Field】 [0001] The invention relates to an anti-lock brake system (ABS) control method in an automobile. 【Background technique】 [0002] At present, ABS has become the standard configuration of passenger cars. The existing ABS controller is basically developed by road recognition + mode control in use. The vehicle is analyzed by acceleration, slip rate, acceleration change, and slip rate change. The current road conditions and changes, and then decide the control strategy. There are several risks in this control strategy, which have already appeared in the actual application of ABS: 1) On smooth ice, the acceleration and slip rate rise and change rates are often very different, and subtle changes in road conditions are also easy to cause Huge changes in the wheel motion status can easily lead to errors in judgment and control mode errors. 2) On ordinary roads, such conditions as stones, ridges, pits, etc., are likely to cause changes in the wheel movement, and the speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/174B60T8/176
Inventor 李维宏邹财松邓翔
Owner BYD CO LTD
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