FIELD: mechanical engineering.
SUBSTANCE: invention relates to positive-displacement hydraulic transmissions of road, construction-and-road building, agricultural and other vehicles. Proposed self-propelled vehicle with position-displacement hydraulic transmission contains adjustable hydraulic pump, hydraulic motor, auxiliary hydraulic pump, pressure valve, check valves, delivery valves, hydraulically controlled change-over and overflow valves, two-position electrically-operated distributor and parking brake control hydraulic cylinder. Adjustable hydraulic pump and hydraulic motor are connected by power hydraulic lines and connected mechanically with engine and drive wheels. Starter relay coil of engine starting system is connected through ignition switch contact with plus current conductor, and through parking brake switch, with minus current conductor. Electromagnetic of parking brake distributor is connected with plus current conductor of supply source by means of relay break contacts, input and output of relay coil being connected, respectively, with plus current conductor and with output of starter relay coil.
EFFECT: improved reliability and simplified control of parking brake.
2 dwg
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