FIELD: machine building.
SUBSTANCE: invention relates to hydraulic control system of transmission. System comprises friction clutches (C1, C2, C3), hydraulic control means of friction couplings (C1, C2, C3), hydraulic control means coupled with friction clutches by friction clutch control channels (L1, L2, L3) and friction clutch cooling means. Cooling control unit (5A) is provided to control flow rate of cooling liquid in friction clutches (C1, C2, C3) and automatically adjusts cooling liquid flow rate in compliance with friction coupling operating condition.
EFFECT: simplified design and higher reliability are achieved.
12 cl, 2 dwg
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