Vehicle ABS control method suitable for various road conditions

A control method and automobile technology, applied in the direction of brakes, etc., can solve the problems of braking distance and directional stability, and achieve the effect of accurate identification

Active Publication Date: 2011-07-13
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The present invention aims at the existing control method based on the auxiliary reference slip rate threshold

Method used

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  • Vehicle ABS control method suitable for various road conditions
  • Vehicle ABS control method suitable for various road conditions
  • Vehicle ABS control method suitable for various road conditions

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Embodiment Construction

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] In the present invention, the ABS ECU main control chip can use Infineon 16-bit single-chip microcomputer XC164CS to process the entire control process, and the structural diagram of the system is as follows figure 1 As shown, the wheel speed sensor collects the wheel speed of the car, and inputs it into the main control unit to estimate the reference speed, calculate the wheel acceleration and reference slip rate, set different thresholds of wheel acceleration and reference slip rate according to different road surfaces, and output through the ABS control unit The solenoid valve control signal is sent to the ABS execution unit to control and adjust the pressure of the brake wheel cylinder to control the vehicle wheels.

[0019] The main control unit mainl...

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Abstract

The invention discloses a vehicle anti-skid brake system (ABS) control method suitable for various road conditions, and relates to the technical field of automobile electronic control. In the method, the ABS control process is divided into a primary control cycle and a conventional control cycle; during the primary control cycle, road surfaces are identified through wheel speed difference; and during the conventional control cycle, the road surfaces are identified through a wheel speed peak slope, a wheel speed reduced value in a depressurization section, and pressurization frequency. For a bisectional road, two front wheels are under corrected low selector control and two back wheels are independently controlled by a control strategy for a corresponding road surface according to the identified road surface; and for a single high adhesion or low adhesion road surface, the front wheels are under pressurization synchronous control, and the back wheels are controlled by a method for a single road surface. The control strategy for the corresponding road surface is adopted according to vehicle adhesion road surfaces. The method can solve the problems of braking direction instability and brake distance when a vehicle brakes on various road surfaces.

Description

technical field [0001] The present invention relates to a control method in an anti-lock braking system (ABS) in an automobile. Background technique [0002] The ABS (Antilock Braking System) braking system, that is, the anti-lock braking system, can automatically adjust the braking force during the braking process of the car, effectively prevent the phenomenon of wheel locking, side slipping, tail flicking, etc., and improve the safety of the car. movement safety. When the car performs emergency braking while driving at high speed, if the front wheels are locked, the car will lose its steering ability; if the rear wheels are locked, the car may have safety accidents such as skidding or tail flicking. In order to solve this problem, domestic and foreign companies and scholars have conducted a lot of research on ABS control methods in recent years. The existing mature method is based on the control method of acceleration and deceleration auxiliary reference slip rate thresho...

Claims

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Application Information

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IPC IPC(8): B60T8/176B60T8/36
Inventor 郑太雄李银国蒋国英马付雷杨勇李炯球马红星
Owner CHONGQING UNIV OF POSTS & TELECOMM
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