FIELD: mechanical engineering; internal combustion engines; valve control system. SUBSTANCE: timing gear valve hydraulic control system of internal combustion engine has service tank, pump, pressure regulator, accumulator, distributor with controlled valves at oil inlet and outlet, control system with pickup unit and valve hydraulic drive mechanisms. Proposed system is simple in design and provides optimization of timing phases at any duty. EFFECT: improved efficiency of operation, enlarged operating capabilities of internal combustion engine. 4 cl, 2 dwg
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