Self-adaptive ABS control method

A control method and self-adaptive technology, applied in directions such as brakes, to achieve the effect of high comfort, avoiding control confusion and failure, and strong comfort

Active Publication Date: 2010-02-17
BYD CO LTD
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  • 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

[0020] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] The ABS controller in this example is based on Motorola Freescale 16-bit microcontroller MC68HC12D64 to realize adaptive control. The technical problems mainly solved by it are: 1) The reliability of the ABS controller is improved. It changes the control failure caused by the wrong selection of the control mode caused by the wrong judgment of the traditional ABS in complex situations such as smooth roads, road obstacles, complex rough roads, and road switching; 2) The adaptability of the ABS controller is improved. It changes the situation that the traditional ABS easily leads to misjudgment of the ABS and failure of control when the vehicle load distribution changes; 3) The comfort of the ABS controller is improved. The control mode is simplified, and it is more comfortable when switching between various road surfaces...

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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 ratioand 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-lockbraking 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 braking system (ABS) control method in an automobile. 【Background technique】 [0002] At present, ABS has become the standard configuration of passenger cars. The existing ABS controllers are basically developed using the method of road surface recognition + mode control, and analyze the vehicle through acceleration, slip rate, acceleration change, and slip rate change. The current road conditions and changes, and then determine the control strategy. There are several risks in this control strategy, which have already appeared in the practical application of ABS: 1) On slippery ice surfaces, the acceleration and slip rate recovery change rates are often very different, and subtle changes in road conditions are likely to cause Huge changes in wheel movement conditions can easily lead to wrong judgments and thus wrong control modes. 2) On ordinary roads, if there are stones, ditches, pits, etc. on the road surfac...

Claims

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Application Information

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