The regulator is mounted on the body bracket and connected to the rear axle beam via torsion lever 4 and rod 7. The other end of the torsion lever acts on piston 10 (Fig. 140).
Fluid enters cavity A from the master cylinder, and from cavity B it exits into the wheel cylinders of the rear brake drive.
The force P acting on the piston from the torsion lever increases as the body approaches the axle beam and decreases as the body moves away from the rear axle beam.
Before the pressure regulator starts to operate, piston 10 rests against plug 6 under the action of force P and spring 9. In this case, gaps are formed through which cavities A and B communicate, i.e. the pressure in them will be the same and equal to the pressure in the brake hydraulic drive.
When the brakes are applied, the rear of the car rises by inertia and, consequently, the pressure on the piston from the side of lever 1 decreases. The force of the fluid pressure on the upper end of the piston with a larger surface area at some point exceeds the force of the fluid pressure acting on the piston from below, and the piston will move down until it stops at seal 7.
[The information can be read on the website: VAZbook.ru]
Cavities A and B are separated, and different pressures are created in them: in cavity A the pressure is PA will be equal to the pressure in the main cylinder, and in cavity B the pressure PB will be less than PA by a value that determines the equilibrium of the piston under the action of pressure PA and RB, springs 9 and the force of the torsion lever. Thus, partial or complete separation of the cavities and piston 10 regulates the braking torque on the rear wheels.