Service brake system It is designed to reduce the speed of the vehicle up to its complete stop and briefly hold the vehicle in a stationary state.
The service brake system is dual-circuit, diagonal, hydraulically driven, consists of a master brake cylinder with a vacuum booster, four wheel brakes with a fluid pressure regulator in the rear brakes. The brake mechanisms of the front wheels are disc, ventilated, the rear wheels are drum.
Working brake system: 1 - brake mechanism of the front left wheel; 2, 6, 12, 17 - brake hoses; 3, 7, 11, 18 - brake pipes; 4 - main brake cylinder; 5 - brake mechanism of the front right wheel; 8 - reservoir of the main brake cylinder; 9 - vacuum amplifier; 10 - brake pedal; 13 - brake mechanism of the rear right wheel; 14 - fluid pressure regulator in the brake mechanisms of the rear wheels; 15 - lever of the fluid pressure regulator in the brake mechanisms of the rear wheels; 16 - rear left wheel brake
Each of the contours of the car includes the brake mechanisms of two wheels (one front and one rear), located on the car diagonally. So, one circuit includes the brake mechanisms of the front right and rear left wheels, and the second circuit includes the brake mechanisms of the front left and rear right wheels. If one of the circuits fails, the second circuit, albeit with less efficiency, will ensure the car stops.
The pressure regulator limits the flow of fluid to the rear brake mechanisms when the rear axle is not sufficiently loaded, thereby preventing the rear wheels from locking and the rear axle of the vehicle skidding during heavy braking. The regulator housing has a control hole closed with a plastic plug.
Leakage of fluid from this hole indicates leaks in the regulator rings.
To reduce the effort applied by the driver to the brake pedal, a vacuum booster is built into the system, which works by using the vacuum formed in the inlet pipeline of a running engine.
Warning! Do not turn off the engine until the vehicle has come to a complete stop.
A reservoir with brake fluid is installed on the body of the master brake cylinder. A sensor is installed in the lid of the tank. In the event of a dangerous drop in the liquid level in the tank, the sensor turns on a warning lamp on the instrument panel.