7.2.4 Pressure regulator
The brake fluid pressure regulator is installed in the brake hydraulic drive system. What is it intended for? The rear wheels shall start braking a moment before the front wheels. This is done in order to prevent the car from skidding if its wheels hit a slippery surface. But the process of car movement is quite complicated, and the car can be loaded with luggage or passengers. This will increase the load on the rear axle. In case if the rear axle becomes heavier, then it will demand more effort to stop it. That's just so that the driver is not burdened with thoughts about the distribution of braking forces between the front and rear axles, in the hydraulic brakes "hit" the regulator.
The pressure regulator adjusts pressure of brake liquid in system of rear brake mechanisms depending on change of loading on back wheels.
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