Upon a drop in pressure in suction pipe 1, the pressure drops in pipeline 4 of supercharger 3 and in bellows 5. Spring 6 moves common bottom 7 of the bellows to the right, shifting valve spool 8, linked to bottom 7, also to the right. Fluid, delivered under pressure to internal groove 9 of the valve, is directed through channel 10 to the right end 11 of the servomotor, moving piston 12 to the left. Pin a, mounted at the end of the rod of piston 12, turns rocker arm 13 about fixed axis A. Motion is transmitted further through connecting rod 14, connected by turning pairs B and C to arm 13 and rocker arm 15, to throttle valve 2. Throttle valve 2 turns about a fixed axis and is rigidly attached to rocker arm 15. This increases the amount of air admitted to supercharger 3 and, consequently, to cylinder 16 of the aircraft engine. When the pressure increases in suction pipe 1, the elements of the regulator operate in the reverse direction. The initial amount of air admitted to the supercharger is regulated by moving joint A with tie-rod 17.
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