Hyundai i-30: Autonomous Emergency Braking (AEB) System / Description and operation

Hyundai i30 (PD) 2018-2024 Service Manual / Brake System / Autonomous Emergency Braking (AEB) System / Description and operation

Description
–
AEB system is designed to help avoid a potential collision or reduce its impact when drivers applies inadequate, delayed or no brakes at all to avoid a collision.
–
The system detects the risk factors on the road by using the frontal impact sensor and warn the driver and activate the emergency brake to prevent collision or reduce collision speed.
Sensor Fusion Type (MFC Camera + AEB Radar)
The following is the system control process
1.
Detect preceding vehicles (pedestrians) and analyze the data (CAN comm.) by using the radar sensor of the Smart Cruise Control System (SCC) and the camera sensor of Lane Departure Warning System (LDWS).
2.
Confirm the object to be protected by AEB system (vehicles and pedestrians) by using the analyzed data.
3.
Calculate the speed reduction depending on the speed, distance, existence or nonexistence of preceding vehicle.
4.
Report the "required speed reduction" to Vehicle Dynamics Control (VDC) (CAN Comm.)
5.
VDC performs automatic control after calculating the required torque to achieve "required speed reduction" (CAN Comm.).
MFC Camera Type
1.
Detect preceding vehicles (pedestrians) and analyze the data (CAN comm.) by using the radar sensor of the Smart Cruise Control System (SCC) and the camera sensor of Lane Departure Warning System (LDWS).
2.
Confirm the object to be protected by AEB system by using the analyzed data.
–
Because performs the AEB system function only with the camera, it works only for the vehicle, not for the pedestrian.
3.
Calculate the speed reduction depending on the speed, distance, existence or nonexistence of preceding vehicle.
4.
Report the "required speed reduction" to Vehicle Dynamics Control (VDC). (CAN Comm.)
5.
VDC performs automatic control after calculating the required torque to achieve "required speed reduction". (CAN Comm.)
Operation
[Sensor Fusion Type (MFC Camera + AEB Radar)]

※ The time indicated will be changed according to vehicle speeds.
1.
Overview of AEB operation
•
Step 1 : Issue a visual (display) and vocal alarm when a danger is detected.
•
Step 2 : Reduce engine torque and activates AEB when there is a high chance of collision.
•
Step 3 : Activate emergency brake when a collision is imminent.
•
After stopping the vehicle : Maintain the braking control for a certain time and then release it.
  
•
Braking power is adjusted depending on the risk levels of collision, but it is released immediately when it detects the driver's action to avoid a collision.
1)
When it exceeded the maximum operation speed.
2)
When it detected driver's action to avoid a collision such as sudden steering changes.
3)
When the shift lever is in R or P
4)
When you pressed the accelerator pedal half way.
  
1)
When you drive at 80km/h or faster, the system does not go to step 3 of emergency braking.
- If the preceding vehicle is a stationary vehicle, it does not advance to the third stage while traveling at 50 kph or more.
2)
While driving at 80km/h or slower on a straight or slightly curved road, the system performs three steps after issuing a warning.
- If the preceding vehicle is a stationary vehicle, it operates at 50 kph or less.
3)
While driving at 80km/h or slower on a straight or slightly curved road, after a visual and vocal warning, AEB is activated to reduce the vehicle speed.
4)
At 80km/h or faster, it's impossible to avoid a collision. Offset should be less than 50%.
5)
AEB does not work on the vehicles backing up or resisting.
6)
At 70km/h or faster, it does not respond to pedestrians.
  
Offset : Rate of non-overlapping on the line between the front driving car and my car
1)
Offset 0% :

2)
Offset 100% :

2.
Operating limit situation
Environmental cause
–
Weather conditions such as snow, rain, and fog
–
Camera and radar contamination
–
Camera can not be recognized by backlight or reflected light
–
Road conditions such as construction section, special structures, etc.
Camera and radar detection performance limits
–
Abruptly interfering vehicle
–
When the width of the front object is narrow
–
Coming up vehicle or backward approach vehicle
–
Pedestrians are pedestrians whose body is obscured or not upright
–
Pedestrians in color similar to the background
–
Illuminance of the pedestrian area is too high or too low to recognize pedestrians
–
A fast-moving pedestrian

[MFC Camera Type]

※ The time indicated will be changed according to vehicle speeds.
1.
Overview of AEB operation
ITEM
Operating overview
Remarks
Range of vehicle speed
 Advance warning
 9 - 100kph (stationary vehicle)
Issue a visual (display) and vocal alarm when a danger is detected.
9 - 175kph (Moving vehicle) (Relative speed 100kph or less)
Pre-braking (Vehicle speed 30kph over)
 30 - 40kph (stationary vehicle)
Reduce engine torque and activates AEB when there is a high chance of collision.
30 - 75kph (Moving vehicle) Relative speed 40kph or less)
emergency braking : (Vehicle speed 30kph or less)
 9 - 40kph (stationary vehicle)
 Activate emergency brake when a collision is imminent.
emergency braking : (Vehicle speed 30kph over)
 9 - 75kph (Moving vehicle) Relative speed 40kph or less)
Detecting distance of camera and radar
5 - 90m
 Daytime
5 - 70m
 Night time
System operation
 System ON/OFF (Default ON) by USM(User Setting Menu) in cluster
 -
Other function
 Ability to adjust sensitivity of advance warning
 -

2.
Operating limit situation
Environmental cause
–
Weather conditions such as snow, rain, and fog
–
Camera and radar contamination
–
Camera can not be recognized by backlight or reflected light
–
Road conditions such as construction section, special structures, etc.
Camera and radar detection performance limits
–
Abruptly interfering vehicle
–
When the width of the front object is narrow
–
Coming up vehicle or backward approach vehicle
–
Pedestrians are pedestrians whose body is obscured or not upright
–
No pedestrians detection

    Autonomous Emergency Braking (AEB) System

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