FIELD: transport engineering. SUBSTANCE: invention relates to locks of center and interaxle differential of cross-country vehicles, wheel arrangement 4x4. In proposed differential locks adapter device is used consisting of three controlled positive displacement hydraulic drives. First hydraulic drive 1 mechanically couples outlet member 9 of interaxle differential with outlet member 16 of rear axle differential, second hydraulic drive 20 couples outlet member 28 of interaxle differential with outlet member 35 of front axle differential, third hydraulic drive 47 couples housing 39 of interaxle differential with its outlet member 28. First hydraulic drive 1 is controlled by first electromechanical converter by difference in control electric signals generated by control devices 94 and 95 proportionally to actual speeds of rear axle wheels, second hydraulic drive 20 is controlled by second converter by difference in signals generated by devices 101 and 102 proportionally to actual speeds of front axle wheels, third hydraulic drive 47 is controlled by third converter by difference in signals generated by above-mentioned devices proportionally to mean values of actual speeds of wheels of front and rear axles. EFFECT: improved traction and speed characteristics, cross-country capability and reduced fuel consumption. 3 cl, 2 dwg
