ABS varies according to the control path, and the performance effect is also different.
In general, it can be divided into:
Mode 1:4 Sensor 4 channels
Mode 2:3 Sensor 3 channels
Mode 3:4 Sensor 3 channels
Mode 4:4 Sensor 2 channels
Mode 5:2 Sensor 2 channels
Mode 6: Single sensor single channel
The most commonly used are mode 1 and Mode 3. The control mode of ABS belongs to electro-hydraulic control. That is, the use of computer control of various solenoid valves, to control the purpose of hydraulic oil road. The total control mechanism is the ABS computer.
The computer collects the wheel speed information detected by the sensors on the four wheels for analysis. If the speed of the four wheels is the same, it is proved that the vehicle is in normal braking condition. If the speed of a wheel is detected to be lower than that of other wheels, the computer will make a judgment that the wheel has been hugged and then notify the solenoid valve that controls the wheel to quickly reduce the braking hydraulic pressure until the hold dies and disappears.
This is the total control method of the ABS system. Depending on the ABS approach, there are also significant differences in performance. Most cars are now fitted with an ABS system with a 4 sensor 4-channel approach, which is the most performing abs. 4 channels are said because it has 4 solenoid valves, each of which is responsible for controlling the braking hydraulics of a wheel. And each wheel also has a special sensor to collect data, so can achieve the purpose of automatic power distribution. That is, it is accurate to brake a particular wheel individually. This means that when a wheel or a wheel on one side is exercised on a pavement with a low coefficient of friction, it can still prevent the wheel from being held to death. This excellent performance of the 4-Channel 4 sensor type ABS has been replaced by a noun EBD, its significance has not only to prevent the death, but can dynamically automatically distribute the power.
So we call it the braking power automatic distribution system.