What is the working principle of a brake proportioning valve?

[LePiper]

Brake proportioning valve is a valve that distributes braking force to the four wheels. During vehicle braking, the state where the wheels stop rotating and slide on the ground is called lock-up. If the rear wheels lock up before the front wheels, it can cause fishtailing or even dangerous spin-outs. The brake proportioning valve can regulate the brake fluid based on the vehicle load and road resistance conditions within a very short time, ensuring that the braking force applied to the front and rear brake pads approaches the ideal curve. This helps to some extent in preventing skidding and wheel lock-up, reducing braking distance, and enhancing braking effectiveness. Additional information: When the brake proportioning valve malfunctions, braking effectiveness decreases, braking distance increases, and during emergency braking, the rear wheels will lock up first, causing the rear of the vehicle to become unstable or even leading to rollovers.