FIELD: machine building.
SUBSTANCE: invention relates to combined transmission device control method. Device comprises drive motor (18), mechanical transmission (16) and hydraulic transmission (20), having pump (24) and n hydraulic engines (26A, 26B). Said pump can be driven by motor drive to feed hydraulic motor fluid. Low-speed amplification phase is carried out, during which, when vehicle is moving by mechanical transmission, preset pressure value is set for pressure difference between power supply and output of hydraulic motors, hydraulic motors are powered by pump, pressure difference is detected between power supply input and output (28A, 28B) of hydraulic motors (26A, 26B) and pump flow rate is controlled so that said difference is substantially equal to said preset pressure value.
EFFECT: higher cross-country capacity.
15 cl, 3 dwg
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