Automatic emergency braking method and device

A technology of automatic emergency braking and road adhesion coefficient, applied in the direction of automatic starting device, etc., can solve the problem of rear-end collision accident, inability to achieve the target deceleration on dry road, etc., to prevent collision accidents and ensure performance.

Active Publication Date: 2015-06-03
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] When it is raining or snowing, the adhesion coefficient of the road surface will be greatly reduced. At this time, if the vehicle brakes suddenly, it is easy to activate the anti-lock braking system. Although the wheels can prev

Method used

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  • Automatic emergency braking method and device
  • Automatic emergency braking method and device

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Embodiment Construction

[0031] figure 1 is a method flowchart of an automatic emergency braking method according to an embodiment of the present invention. Such as figure 1 As shown, an embodiment of the present invention provides an automatic emergency braking method, which at least includes steps S102 to S110.

[0032] Step S102 , setting the corresponding relationship between the road surface adhesion coefficient and the target deceleration, so that the target deceleration obtained through the corresponding relationship under the condition of the road surface adhesion coefficient can avoid the intervention of the anti-lock braking system.

[0033] Step S104, obtaining the current road surface adhesion coefficient from the anti-lock braking system.

[0034] Step S106, searching for a corresponding relationship according to the current road surface adhesion coefficient, and obtaining the current target deceleration.

[0035] Step S108, calculating the collision time according to the speed of the ...

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Abstract

The invention provides an automatic emergency braking method and an automatic emergency braking device. The method comprises the steps that a corresponding relationship of road adhesion coefficient and target deceleration is set, and the target deceleration obtained through the corresponding relationship can avoid the intervention of a deadlock prevention braking system under the condition of the road adhesion coefficient; the current road adhesion coefficient is obtained via the deadlock prevention braking system; the corresponding relationship is searched according to the current road adhesion coefficient, so that the current target deceleration is obtained; the collision time is calculated according to the speed of the vehicle, the speed of a front vehicle, the distance between the two vehicles and the current target deceleration; when the collision time is less than a threshold value, the automatic emergency braking is carried out according to the current target deceleration. The automatic emergency braking method and the automatic emergency braking device aim to ensure the performance of the automatic emergency braking system and prevent the occurrence of collision accidents when the vehicle runs under lower road adhesion coefficient.

Description

technical field [0001] The invention relates to the field of vehicle emergency braking control, in particular to an automatic emergency braking method and device. Background technique [0002] The working principle of the automatic emergency braking system in existing vehicles is: use environmental sensors, millimeter-wave radar or cameras to detect the vehicle in front, and when the controller judges that the two vehicles are about to collide, send a braking command to the anti-lock braking system Apply the brakes. The braking command sent by the controller in the automatic emergency braking system is mainly the target deceleration to avoid collision, and the target deceleration is the same regardless of whether it is sunny, rainy or snowy. The anti-lock braking system can ensure that the wheels are not locked during emergency braking of the vehicle, thereby ensuring the braking performance of the vehicle. [0003] When it is raining or snowing, the adhesion coefficient o...

Claims

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Application Information

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IPC IPC(8): B60T7/12
CPCB60T7/12
Inventor 徐杰李博霍克周大永刘卫国吴成明冯擎峰
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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