FIELD: agriculture; engineering.
SUBSTANCE: driving chassis of the combine harvester vehicle comprises a front part of the driving chassis articulated with a harvester head containing a central section, a left section and a right section. Left actuator is articulated with the central section and with the left section to rotate it relatively to the central section. Right actuator is articulated with the central section and with the right section to rotate it relatively to the central section of the head. Chassis comprises a ground force control circuit including an electronic control unit and a first hydraulic control valve actuated by the electronic control unit. First hydraulic control valve is coupled to the right actuator and is configured to maintain constant pressure at least in the right actuator. Third hydraulic control valve, actuated by the electronic control unit, is coupled to the left actuator and is configured to maintain constant pressure in the left actuator.
EFFECT: invention supports the outer sections of the head and provides the ground force control.
14 cl, 4 dwg
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