[WapCar] Brake assist is generally called EBA or BAS/BA, can be divided into mechanical and electronic this two types. Its work princple is that the sensor identifies and judges whether introduce emergency braking procedures by distinguishing the driver's pedaling situation. As a result, the system can immediatly excite the maximum braking pressure to reach the highest possible braking effect to prevent traffic accidents.
Brake assist system
The brake assist system is also called BAS, which is actually slightly modified on the basis of common brake booster. When the brake force is not large, it plays an important role as a booster, as the brake force increases, the pressure of afterburner pressure chamber increases and then ABS is started. It is the predecessor of EBA electronic emergency brake assist device.
Electronic brake assist system
Electronic brake assist system (EBA) uses sensors to sense the strength and speed of driver's stepping on the brake pedal, and then judges driver's intention to brake by using the computer. If it is a very urgent brake, the EBA will instruct brake system to generate higher oil pressure to make ABS work, so that the brake force quickly generates and the brake distance is shortened. But for braking in normal situation, the EBA will not start ABS through judgement.
Working principle
The sensor is used to distinguish the situation of the driver's pedaling, and to identify and judge whether to introduce an emergency braking program. As a result, the system can immediately stimulate the maximum braking pressure to achieve the highest possible braking effect to prevent traffic accidents.
In an emergency situation, most drivers can quickly step on the brake pedal, but it is not strong enough, or when the initial collision subsides, the driver will relax the brake pedal prematurely, and these two points are exactly what the EBA system wants to solve. Once the EBA system detects the sudden increase in the speed of the driver’s stepping on the brake pedal and continues to step on the brake pedal vigorously, it recognizes emergency braking and releases the 18MPa brake fluid pressure stored in the ABS accumulator (under normal conditions, conventional braking can only make the master cylinder brake fluid produce a brake fluid pressure of 2-8MPa), and make it enter the two working chambers of the master cylinder through the working channel of the accumulator in the ABS pressure relief program, and establish the maximum braking force within a few milliseconds. Since the maximum braking force is applied earlier, the EBA system can brake in advance, significantly shortening the braking distance, and can effectively prevent rear-end collisions in stop-and-go traffic conditions.