Kia Forte: Brake System / Forward Collision-Avoidance Assist (FCA) System

Kia Forte 2019-2020 (BD) Service Manual / Brake System / Forward Collision-Avoidance Assist (FCA) System

Description and operation
Description

FCA 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.

1.

Deactivation condition

Normal deactivation by the driver

FCA OFF

VDC 2 OFF

Deactivation by the driver
When it exceeded the maximum operation speed.
When the shift lever is in R or P
When you pressed the accelerator pedal half way.
When it detected driver's action to avoid a collision such as sudden steering changes.
Deactivation by the system malfunction

Faulty rader / camera / ECU

When the related modules and CAN communication have failures


2.

Limitations

Environmental factor

Inclement weather such as heavy rain or snow obscures the field of view of the radar sensor or camera

The driver's field of view is not well illuminated (either too dark or too much reflection or too much backlight that obscures the field of view

The camera/radar is contaminated.

Limitations in camera and radar detection

The vehicle/pedestrian appears abruptly (beyond field of view).

The vehicle in front is too small to be detected (for example a motorcycle or a bicycle, etc.).

The vehicle in front does not have their rear lights properly turned ON.

The vehicle in front is driving towards your vehicle or reversing.

The pedestrian is not fully detected by the system, for example, if the pedestrian is leaning over or is not fully walking upright.

The pedestrian is wearing clothing that easily blends into the background, making it difficult to be detected by the system.

The outside lighting is too bright (e.g. when driving in bright sunlight or in sun glare) or too dark (e.g. when driving on a dark rural road at night).

The pedestrian is moving very quickly or appears abruptly.


Operation
1.

 Basic specification (front camera applied)

※ The time indicated will be changed according to vehicle speeds.

Step 1 : Issue a visual (display) and vocal alarm when a danger is detected.

Step 2 : Reduce engine torque and activates FCA 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 60km/h - 160km/h or faster, the system does not go to step 3 of emergency braking.

- Full auto braking is not available.

2)

When you drive at 60km/h or faster, the system does not go to step 3 of emergency braking.

- But a collision may occur at depending on the road conditions.

3)

Offset should be less than 50%.

4)

FCA does not work on the vehicles backing up or resisting.

  

Offset : Rate of non-overlapping on the line between the front driving car and my car

1)

Offset 0% :

2)

Offset 100% :

2.

When the Smart Cruise Control is applied at the same time (front radar added)

The time indicated will be changed according to vehicle speeds.

Step 1 : Issue a visual (display) and vocal alarm when a danger is detected.

Step 2 : Reduce engine torque and activates FCA 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 85km/h - 160km/h or faster, the system does not go to step 2 of emergency braking.

- Full auto braking is not available.

2)

When you drive at 85km/h or faster, the system does not go to step 3 of emergency braking.

- But a collision may occur at depending on the road conditions.

- Partial braking may be applied according to the surrounding environment.

- For the vehicle parked in front, full braking is applied at level 3 after the warning only when the vehicle speed is under 75 km/h.

Up to level 2 is performed when the vehicle speed is over 75 km/h.

- For the pedestrian and cyclists, full braking is applied at level 3 after the warning only when the vehicle speed is under 65 km/h.

Up to level 1 is performed when the vehicle speed is over 65 km/h.

3)

Offset should be less than 50%.

4)

FCA does not work on the vehicles backing up or resisting.

  

Offset : Rate of non-overlapping on the line between the front driving car and my car

1)

Offset 0% :

2)

Offset 100% :

Components and components location
Components

The following is the configuration of the FCA system.

[Basic specification (Front camera applied)]

Detection device (camera) that can recognize potential obstacles in the front.

Human-Machine Interface (HMI) to warn driver or change settings.

Braking system to automatically brake the car

[When the Smart Cruise Control is applied at the same time (Front radar added)]

Detection device (radar and camera) that can recognize potential obstacles in the front.

Human-Machine Interface (HMI) to warn driver or change settings.

Braking system to automatically brake the car

FCA, contrary to FCA (Smart Cruise Control), has to work on a stationary car so the system uses the Fusion Target system to combine radar with camera.

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