FIELD: transport engineering; automatic and semiautomatic gearshift systems. SUBSTANCE: in proposed invention output signals indicating driving shaft speed are compared with product of input signals indicating speed of driven shaft by gear ratio. As a result, control parameters are received indicating value and phase of transmission torque without the use of torque transducer. EFFECT: higher accuracy of taking decision of gearshifting and shifting the gears. 21 cl, 7 dwg
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