9.4. Vacuum amplifier

Operation of the vacuum amplifier 

Fig. 8.2. Vacuum amplifier: A1, A2, A3, A4 and A5 — cavities of the vacuum amplifier; A6 — openings; 1 — the backpressure valve; 2 — the sealing plug; 3 and 16 — pushers; 4 — an adjusting bolt; 5, 10, 17 — pistons; 6 — a cover; 7 and 8 — diaphragms; 9 — a persistent ring; 11 — the case of the amplifier; 12 — the directing rings; 13 — sealing cuffs; 14 — the filter; 15 — the case of valves; 18 — a diaphragm of valves; 19 — the screw; 20 — a jet washer; 21 — a spring; 22 — a connector of pistons

For reduction of the effort enclosed to a brake pedal between it and the main brake cylinder the two-chamber vacuum amplifier (fig. 8.2) working from depression in an inlet pipe of the engine is installed.
The amplifier consists of the case 11, a cover of the case 6, a persistent cover in which pistons 5 and 10 with diaphragms 7 and 8 are installed. On the carving end of a connector of pistons 22 by means of a nut the secondary piston 5 fastens, and to a flange part of a connector the piston 10 and a diaphragm 18 by means of six bolts which are screwed in the case of valves 15 fasten.
In the case of 15 valves two screws 19 fix a pusher 16 with the piston 17 and the filter 14. The jet washer 20 through which on a pusher 3 the total effort from the pusher 16 which is directly connected with a brake pedal and from both pistons of the amplifier is transmitted is installed in the piston 10. The gap between a pusher 3 and primary piston of the main brake cylinder is necessary for providing a disinhibition of system. The gap is provided by means of an adjusting bolt 4. The head of a bolt has to be drowned on 1,35 — 1,65 mm of rather privalochny plane of a cover to which the flange of the main cylinder fastens.