What is the working principle of ABS?

[LeWalker]

The working principle of ABS is: During braking, ABS can quickly determine the wheel lock-up state based on the speed signals from each wheel speed sensor, and then close the normally open input solenoid valve on the wheel that is starting to lock up, keeping the braking force constant. If the wheel continues to lock up, the normally closed output solenoid valve is opened, causing the braking pressure on that wheel to rapidly decrease due to the direct connection to the brake fluid reservoir, preventing the wheel from completely locking up due to excessive braking force. The functions of ABS are: 1. Maximize the effectiveness of the brakes, reducing braking time and distance; 2. Effectively prevent vehicle skidding and fishtailing during emergency braking, ensuring good driving stability; 3. Allow steering during emergency braking, providing good steering control; 4. Avoid severe friction between the tires and the ground, reducing tire wear.