What is the difference between ABS/EBS/AEBS?

ABS: ABS is an anti-lock braking system. When the vehicle brakes, the system can automatically control the braking force of the brakes to prevent the wheels from being locked and to keep them in a rolling and sliding state, thereby ensuring that the adhesion between the wheels and the ground is at the maximum.

EBS: EBS stands for Electronic Braking System. It can be seen as an upgraded version of ABS, which replaces the original purely mechanical control with an electronic control system. EBS not only improves performance, but also comprehensively expands functionality. 

AEBS: Automatic Emergency Braking System. This system detects targets through sensors such as radar and cameras. When it determines that there is a risk of collision between the vehicle and the vehicle in front, it will issue an early warning and automatically brake.

Through the principles of the above three systems, it is not difficult to see that ABS/EBS/AEBS are all key technologies in automobile braking systems. They play an important role in improving vehicle safety and driving stability. There are similarities and differences between them.

Similarity 1: These three systems have a common goal, which is to brake the vehicle and improve driving safety.

Similarity 2: ECU is at the core. In all three systems, the electronic control unit (ECU) plays a vital role. The ECU is responsible for receiving signals from sensors, performing complex calculations and processing, and issuing control instructions to adjust the working state of the brake system.

Similarity 3: Assisting the driver. All three systems assist the driver to some extent. ABS improves the driver's ability to control the vehicle by preventing the wheels from locking; EBS shortens the vehicle's braking reaction time by calculating and transmitting electrical signals, thereby shortening the braking distance and improving braking safety; AEBS can automatically intervene in braking in an emergency, reducing the burden on the driver.

In short, the similarities between ABS, EBS and AEBS reflect the commonality and trend of the development of automobile braking system technology, but they have their own different technical characteristics.

● ABS technical features: The ABS system uses wheel speed sensors to detect the rotation speed of the wheels in real time. When a wheel is about to lock, the ABS system will quickly reduce the braking force to allow the wheel to resume rolling, and then increase the braking force again, and so on, until the vehicle stops completely.

ABS systems are classified according to channels, including one-channel, two-channel, three-channel and four-channel types. Different types differ in control accuracy and effect.

It is important to note that the purpose of the ABS system is to provide better vehicle control and stability in emergency braking situations. Although the ABS system cannot directly shorten the braking distance, it does improve the safety performance of the car.

● EBS technical features: The EBS system mainly prevents wheel lock by quickly and continuously adjusting the brake pressure, and EBS introduces an electronic control system to replace the traditional mechanical system.

In simple terms, the EBS system collects information such as brake signals and wheel speed through sensors, and then processes and calculates them through the electronic control unit (ECU), and controls and adjusts the brake pressure through the rapid transmission of electrical signals, thereby achieving better braking effects. At the same time, the EBS electronic brake control system is also the hardware foundation for realizing L2\L3 and even higher levels of assisted driving in the future.

At the same time, the EBS system also has functions such as anti-tilt control, deceleration control, braking force distribution, main suspension consistency control, auxiliary brake integration, friction pad wear control, and brake temperature monitoring. In addition, unlike ABS, the EBS system can achieve faster braking response time and shorter braking distance, making braking safer and more efficient.

● AEBS technical features: The working principle of AEBS is generally divided into three parts in the industry: "perception", "decision-making" and "execution".

Perception means "seeing or detecting", which is mainly achieved through sensors such as radar and cameras to observe road conditions at any time and detect pedestrians, non-motor vehicles, and static or dynamic vehicles. 

Decision-making is to make corresponding instructions based on the relevant situations perceived by the vehicle. The ECU is used to judge the information obtained by the sensor, such as the distance between us and the vehicle in front, at what distance to start reminding the driver, whether braking measures are needed, etc.

Execution is to take action based on the decision information provided by the ECU, give the vehicle sound and light warnings, or directly brake and slow down the vehicle.

It should be noted that due to the influence of external factors such as road conditions, tire tread depth, cargo loading conditions, main suspension matching, vehicle condition, etc., the AEBS system cannot 100% avoid collision accidents within the set emergency braking range.