Brake assist control system

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Page 95

Brake assist control system

Service brake

CAUTION

◆ I f sharp metallic friction sound is emitted during braking, the brake linings may be close to the wear limit, and it is recommended to contact the GAC Service Center for inspection and repair in time. ◆ I f the vehicle vibrates or buffets

continuously during braking, it is recommended to contact the GAC Service Center for inspection and repair in time.

NOTE

◆ Under certain driving and weather conditions, squeaks, screams, or other noises may be heard from brakes when the brake pedal is depressed for the first time or lightly stepped on, or braking noise during light or moderate braking, especially for new vehicles (as their brakes have not undergone running-in), which is normal, and does not constitute a failure symptom of braking system nor has effects on the braking safety and performance. ◆ Under normal driving conditions, the dust accumulation due to brake wear will not affect the braking performance. ◆ I f rust and corrosion exist because the brake linings and brake discs are not used or used rarely, noise may be heard from brakes for the first use. This is normal. Safe areas and good road conditions are recommended for braking the vehicle several times to clean the brake linings and brake discs.

Anti-lock braking system (ABS)

ABS prevents wheel lockup when you apply the maximum braking force. Under most of the road conditions, the steering control performance of the vehicle can be improved during emergency braking.

During emergency braking, ABS continuously monitors the speed of each wheel and automatically adjusts brake pressure according to the lockup state.

During operation of ABS, you may perceive sounds or vibration, which indicates that ABS is working and is normal. Don't panic.

WARNING

◆ The driver should always maintain the safety distance from the vehicle ahead and master the dangerous situation during driving. Although ABS can improve the braking distance, it cannot go beyond the physical law, and also cannot prevent the danger due to tire slip (when the water layer between the road surface and the tire prevents direct contact between the tire and road surface).

Electronic brake force distribution (EBD)

During normal braking, the EBD balances the distribution of braking force on front and rear wheels according to the vehicle load, in order to achieve the shortest braking distance under the premise of stable braking. This improves the stability and operability of the vehicle during braking, especially during driving on poor or wet and slippery roads.

Electronic stability program (ESC)

The electronic stability program (ESC) determines the driving intention of the driver according to the steering wheel angle and the vehicle speed, and compares it with the actual driving condition of the vehicle continuously. In case of departure from normal driving route (such as in case of sideslip), ESC makes correction by applying braking force and limiting torque output to the corresponding wheel to ensure the stability of the vehicle.

Page 96

The ESC system is enabled by default after the vehicle is started. For some models, the ESC system can be enabled or disabled on the center console display.

WARNING

◆ The ESC system will work when the vehicle is running, and it should be turned on for driving safety. The ESC function can be disabled under the following special circumstances: - The vehicle is equipped with anti-skid

chains. - The vehicle is running in deep snow or on soft surfaces.

- The vehicle is stuck on a muddy road and needs to be moved back and forth.

Electronic Anti-rollover System

The Electronic Anti-rollover System prevents rollover by active braking interventions at the wheels when a dangerous situation of vehicle rollover is detected, thus reducing the lateral tire forces.

Multi Collision Braking (MCB)

In certain collision scenarios, the system automatically applies the brakes to help prevent or mitigate potential secondary impacts. MCB cannot be deactivated by the user.

When activated, MCB assists in bringing the vehicle to a controlled stop. During this process, the brake lights and hazard warning lights will illuminate, with the hazard lights remaining on after the vehicle comes to a complete standstill. The electric parking brake will then engage automatically for added safety.

If stopping the vehicle is not desired (e. g., for evasive maneuvers), you can override the system by pressing the accelerator pedal.

NOTE:

◆ MCB only functions when the braking

braking system remains operational after the initial collision, providing an additional layer of protection for your journey.

Hill-start Hold Control (HHC)

The hill-start hold control (HHC) is mainly used to help the driver to pull away successfully on a steep slope.

When the vehicle is stationary, the HHC detects whether the vehicle is on a slope through the longitudinal acceleration sensor. Subsequently, when the vehicle goes up the slope from the stationary state (through forward traveling or reversing), the HHC will automatically enter the working state. At start, when the driver releases the brake pedal, the HHC will maintain the previous brake pressure to ensure that the vehicle remains still and gradually reduce the brake pressure with the increase of driving torque to realize the effect that the vehicle does not slide in the opposite direction without application of parking brake, which greatly facilitates vehicle starting and pedal operation.

On the premise of meeting the following conditions, if the driver depresses the brake pedal with the vehicle stopped, the HHC is activated:

◇ The accelerator pedal is not depressed.

◇ The vehicle is stationary.

◇ The EPB is not applied.

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Hill descent control (HDC)

The hill descent control (HDC) system assists the driver in descending slopes at low speeds through active braking. If the HDC system detects wheel slippage, the ESC system actively intervenes to help the driver descend safely and smoothly. The HDC function operates within a speed range of approximately 8-35 km/h. Within this range, you can adjust the speed by pressing or releasing the accelerator or brake pedal. The speed is controlled when the accelerator or brake pedal is released. The hill descent control (HDC) indicator lamp will flash when the HDC system is active. You can enable or disable the HDC system via the central console display. When the vehicle speed is below 35 km/h and HDC is activated, the HDC indicator lamp on the instrument cluster will illuminate. When the vehicle speed exceeds 60 km/ h, the HDC system will deactivate, and the HDC indicator lamp on the instrument cluster will turn off.

Hydraulic brake assist (HBA)

HBA assists the driver in emergency braking. It determines whether full braking is required based on the speed at which the driver depresses the brake pedal. As long as the driver depresses the pedal to the floor all the time, the HBA will automatically increase the braking force to the threshold at which the ABS activates. If the driver releases the brake pedal, the HBA will reduce the braking force to the specified value.

WARNING

◆ The hydraulic brake assist (HBA) system can enhance your driving safety, but it cannot override the laws of physics. Adjust your driving speed according to road conditions and traffic regulations.

Cooperative regenerative brake system (CRBS) The cooperative regenerative brake system (CRBS) combines motor feedback torque and hydraulic braking torque to meet the driver's braking demand. When the driver presses the brake pedal, the motor feedback torque and hydraulic braking torque work together to control the braking request.

WARNING

◆ Always adjust the vehicle speed according to weather, road and traffic conditions. Never risk driving merely by virtue of the additional safety functions provided by the brake assist control systems, so as to prevent accidents.

◆ Electronic stability program (ESC) cannot go beyond the physical limit of road adhesion; be careful during driving on a wet and slippery road or with a trailer coupled.

◆ The driver should adjust the driving style at any time according to the road and traffic conditions.

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CAUTION

◆ Improper operation or modifications (such as modifications to the brake system, wheels, tires and other components) of the vehicle will affect the function of ESC and ABS.

◆ Tires of specified specifications and size must be used. If the tire size is incorrect, or the size of the tires is inconsistent, the ABS may not function.

◆ When the instrument has an alarm related to the HDC system, you need to pay attention to safe driving. If you need to restore the function, you need to stop until the brake temperature cools.

NOTE

◆ In case of failure in ABS, the normal braking system can still work normally, but braking characteristics have changed.

◆ In some special working conditions such as a long slope, the HDC function may be temporarily unavailable due to high brake temperature.

Acoustic vehicle alerting system of electric vehicle running at low speed

During driving at low speed, the acoustic vehicle alerting system sounds the warning chime to warn pedestrians and vehicles to improve driving safety.

Acoustic vehicle alerting system alarm

The system sounds the warning chime when the vehicle runs forward at the speed of not more than 25 km/h. The vehicle also emits a warning sound when reversing.