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Steering brake stabilization control system of automobile

A technology of stability control and brake controller, which is applied in the direction of brakes, etc., can solve problems such as vehicle danger, entering the opposite driving lane and colliding with the vehicle coming from the opposite direction, and the car deviates from the expected driving lane, so as to reduce traffic accidents, Improved braking safety and reduced braking distance

Inactive Publication Date: 2009-05-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Braking deviation occurs when the car brakes in a straight line because the speed of the ground braking force of the left and right wheels increases inconsistently, which makes the ground braking force of the wheels on both sides unequal, resulting in braking deviation; Strictly speaking, the maximum ground braking force of each wheel is not equal due to the influence of wheel vertical load, side slip angle, body roll, etc. There is a certain difference, which has a certain impact on the braking deviation of the car during the turning braking process; Skidding or turning sharply, the car is prone to deviate from the expected driving lane or even enter the opposite driving lane and collide with the oncoming vehicle, which is extremely dangerous for vehicles without stability control systems

Method used

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  • Steering brake stabilization control system of automobile
  • Steering brake stabilization control system of automobile
  • Steering brake stabilization control system of automobile

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Experimental program
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Effect test

Embodiment 1

[0025] like figure 1 As shown, the present invention includes a lane departure measuring device 1 that detects the amount of lateral path deviation and an electronic device that controls the steering wheel steering controller 8 and each wheel brake controller 9 according to the output signal of the lane departure measuring device 1. control unit7.

[0026] Wherein, the lane departure measuring device 1 includes a lateral displacement sensor 5, and compares the actual lateral deflection displacement value detected by the lateral displacement sensor 5 in real time with the given lateral deflection displacement value given by the driver in real time. And draw the lane departure controller 10 of lateral path deviation amount; Said lane departure controller 10 joins with the vehicle speed sensor 11 that is installed on the car body and the steering wheel angle sensor 12 that real-time detection is carried out to the steering wheel angle angle, and the lane The deviation controller...

Embodiment 2

[0030] like figure 2 As shown, in this embodiment, the present invention also includes a tire parameter measuring device 2, which is a wheel angular velocity sensor 3 and a tire vertical load sensor 4 for real-time detection of four wheel angular velocities and vertical loads respectively. In addition, the electronic control unit 7 is also embedded with a tire lateral force neural network model and a tire longitudinal force neural network model correspondingly established according to the real-time detected signal of the tire parameter measurement device 2, and the two are synthesized into a multi-dimensional space characteristic of the tire force model. The neural network control function module 15 of the curved surface; the fuzzy control function module 14 is based on the signal detected by the lane departure measurement device 1 in real time and in combination with the tire optimal slip rate determined in real time by the multidimensional space characteristic surface of the...

Embodiment 3

[0034] like image 3 As shown, in this embodiment, the lane departure measuring device 1 also includes a vehicle body angle sensor 6 installed at the center of mass of the vehicle body, and the lane departure controller 10 uses the lateral displacement sensor 5 and the vehicle body angle sensor 6 to measure the vehicle body angle in real time. The detection signal is combined and compared with the given lateral deflection displacement value to obtain the lateral path deviation amount. Therefore, when the automobile performs steering braking, the vehicle body rotation angle sensor 6 installed at the center of mass of the vehicle body detects the actual deflection angle of the vehicle body in real time, and simultaneously transmits the detected signal to the lane departure controller 10 synchronously. The deviation controller 10 combines the signals detected by the lateral displacement sensor 5 and the vehicle body angle sensor 6 in real time to determine the actual deflection d...

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Abstract

The invention discloses an automobile steering-braking stability control system, comprising a lane departure measuring device used for measuring the lateral path deviation amount and an electronic control unit used for correspondingly controlling a steering controller of a steering-wheel and braking controllers of each wheel according to the output signal of the lane departure measuring device. The lane departure measuring device comprises a lateral deviation sensor and a lane departure controller used for correspondingly comparing the actual lateral deviation value with a timely lateral deviation value provided by a driver to get the required lateral path deviation amount; a fuzzy control functional module used for correspondingly controlling the steering controller of the steering-wheel and braking controllers of each wheel according to the lateral path deviation signal output by the lane departure measuring device is embedded into the electronic control unit. The structure of the invention is proper and the operation is convenient; the invention can effectively enhance the braking stability of automobiles so as to raise the safety of automobile braking on a long and big downhill turn of a mountain road.

Description

technical field [0001] The invention relates to the technical field of automobile brake control, in particular to an automobile steering brake stability control system. Background technique [0002] The directional stability of the car during braking refers to the ability of the car to brake according to the trajectory given by the driver during the braking process, that is, the ability to maintain straight-line braking or brake according to a given radius curve. During the braking process, the car often has braking deviation, sideslip or loss of steering ability, which will cause the car to lose control and deviate from the original driving direction. The survey shows that the proportion of accidents related to sideslips occupies a large proportion on wet roads and ice and snow roads, and about half of sideslips are caused by braking. [0003] Braking deviation occurs when the car brakes in a straight line because the speed of the ground braking force of the left and right...

Claims

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Application Information

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IPC IPC(8): B60T8/1755B60W30/02B60W30/045
Inventor 魏朗陈涛赵伟邱兆文张 林广宇杜峰赵凯辉
Owner CHANGAN UNIV
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