AEB(Autonomous Emergency Braking) is a function purposed to
avoid the collision or to reduce the damage against the accident which
can be taken place from the late braking or insufficient braking power
due to the reason of absented mind of the driver.
The sequence of system control is as follows.
| 1. |
Sensing the vehicle driving ahead and data analysis with the
radar sensor of smart cruise control system (SCC) and camera sensor on
the Lane Keeping Assist System (LKAS) (CAN Communication) |
| 2. |
Checking the vehicle for AEB control with analyzed sensing data |
| 3. |
Calculation of proper speed reduction depending on the existence/speed/distance of the car ahead |
| 4. |
Transmitting the calculated "required speed reduction" to the Electronic Stability Control(ESC) (CAN Communication) |
| 5. |
ESC performs the braking control after calculating the
required torque for realizing the "required speed reduction" (CAN
Communication) |
? The time presented in the illustration varies depending on the vehicle speed.
| • |
Step 1: The visual (Display) alarming is made when the collision risk is sensed. |
| • |
Step 2: Voice and haptic (Steering wheel vibration) alarming is made.
The engine torque reduction and automatic braking are made when the collision risk increases. |
| • |
Step 3:Quick braking is performed at the risk of collision
After automatic braking: The braking control is released after keeping the braking power for a certain time. |
|
The braking power differs depending on the level of collision
risk, but the automatic control is released immediatelyupon recognizing
the driver’s behavior for avoidance. |
| 1. |
It does not move to the step 3 alarming condition while driving over 80km/h. |
| - |
Impossible to perform the full auto braking and complete safety belt fastening braking. |
| 2. |
Step 3 is performed after alarming while driving on straight road and on smoothly curved road below 80km/h |
| - |
However, the collision can take place in the medium high speed over 30kmg/h depending on the road surface condition |
| 3. |
Vehicle speed is reduced by performing the automatic braking
after voice alarm while driving on straight road and on smoothly curved
road below 180km/h. |
| 4. |
Avoiding the collision is impossible over 80km/h and the offset shall be less than 50%. |
| 5. |
It does react to the reversely moving vehicle and approaching vehicle. |
|
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Offset : the non-overlapping rate on a line between the vehicle and the one driving ahead
|
Components and Components Location