FIELD: machine building.
SUBSTANCE: disclosed is working machine braking system. System comprises source of pressurized fluid medium, main valve connected to source by fluid medium, proportional control valve connected to source by fluid medium. System also includes fluid medium outlet configured to be connected to trailer brake system via fluid, first passage for fluid medium, selectively connecting source with fluid medium outlet by means of main valve by fluid medium, second passage for fluid medium, selectively connecting source with output of fluid medium by means of proportional fluid control valve. At that, main valve contains preset fixed amplification factor, and proportional control valve contains controlled coefficient. Method of controlling pressurized fluid, braking system for combination of tractor with trailer.
EFFECT: control of amplification factor, increased stability.
20 cl, 5 dwg
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