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Operation of the hydraulic braking system
| Fig. 6.1. Brake components and their location on the vehicle: 1 - the brake pedal; 2 - the stoplight switch; 3 - gidrovakuumny brake booster; 4 - the master cylinder; 5 - unit ABS (Antilock Brake System); 6 - a pressure regulator rear brakes; 7 - the parking brake lever; 8 - Caliper rear wheel; 9 - caliper front wheel; 10 - rear wheel speed sensor; 11 - the gauge of speed of the front wheel; 12 - the brake fluid reservoir
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| Fig. 6.2. The circuit hydraulic braking system: 1 - return valves; 2 - the valve plunger pump; 3 - accumulator; 4 - camera suppressing pulsations in the system; 5 - electric motor with eccentric piston pump; 6 - the brake fluid reservoir; 7 - service brake; 8 - amp; 9 - the master cylinder; 10 - pack abs; 11 - final operated valves; 12 - inlet operated valves; 13 - throttling valve; 14-17 - brakes
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When you press the brake pedal 7 of its key lever releases the brake light switch, which actuating includes bulbs of stoplights and causes the ABS standby status. The movement of the pedal through the rod and the vacuum amplifier 8 is transmitted to the pistons of the master cylinder 9. The central valve in the secondary piston and primary piston sleeve cover message contours tank 6 for brake fluid. This leads to an increase in pressure in the brake circuits. It acts on the pistons, brake cylinders, brake calipers. As a result, the discs are pressed. When the pedal all the items are being returned to its original position. If braking one of the wheels close to the lock (as reported by the speed sensor), the control unit closes the inlet valve 12 of the corresponding circuit, which prevents the further increase in pressure in the circuit independent of pressure increase in the master cylinder. At the same time, starts operating the hydraulic plunger pump 5. If the rotation of the wheel continues to decelerate, the control unit opens the exhaust valve 11, allowing the return of brake fluid in the accumulator 3. This leads to a decrease in pressure in the circuit and allows the wheel to rotate faster. When excessive wheel spin is accelerated (relative to the other wheels) to increase pressure in the control unit closes the exhaust valve 11 and opens the inlet 12. The brake fluid supplied from the master cylinder and via a plunger 5 of supercharger accumulators 3. Damping chamber 4 is smoothed ( inhibit) the pulsation occurring in the system when the pump plunger.
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