General description of the braking system

Brake system with dual-circuit hydraulic drive - a system with a diagonally divided hydraulic drive. Accordingly, a separate brake circuit is installed for the front wheel and the diagonally opposite rear wheel.

The brake master cylinder converts the mechanical force applied to the brake pedal into hydraulic force. Responsible for the rapid decrease in pressure in the system after releasing the pedal.

The brake booster is located on the left in the engine compartment behind the master brake cylinder, connected to the exhaust manifold by a pipeline. When braking, the elastic membrane reacts to the pressure difference between the outside air and the exhaust manifold. As a result of this, the membrane additionally presses on the piston of the brake master cylinder.

Brake fluid in brake pipes and cylinders is a mixture of glycol, polyglycol ether and a couple of other components. It is most often yellowish or colorless, usually poisonous and aggressive towards the paintwork, the liquid does not corrode the metal and rubber parts of the brake system, even at a temperature of -40°C it remains liquid and, despite its fluidity, has a very high boiling point - about +290°С.

Brake fluid is very hygroscopic. If the proportion of water in it is 2.5%, then the boiling point drops to + 150°C. With heavy loads on the brakes, this is very dangerous. Near hot brakes, steam bubbles can form in the hydraulic fluid, which compress and cause the brake pedal to sag (in this situation, sometimes it helps to quickly pump the hydraulic drive).