Efficiency control device of high power hydraulic transmission system

The utility model discloses an efficiency control device of a high power hydraulic transmission system, which is characterized in that the device consists of an engine, a hydraulic torque converter, a gearbox, a throttle opening sensor, an engine speed sensor, a throttle actuator, a turbine speed sensor, a shifting handle position sensor, a shift control valve, a shift electromagnetic valve, a knife control valve and a controller; both the throttle opening sensor and the engine speed sensor are installed on a throttle pull rod of the engine and a flywheel of the engine respectively, and connected with the controller through wires; the throttle actuator is connected with the throttle pull rod and the controller respectively; the turbine speed sensor is connected with a turbine shaft of the hydraulic torque converter and the controller respectively; the shifting handle position sensor is connected with a shifting handle of the gearbox and the controller respectively; the shift control valve is connected with the gearbox and the shift electromagnetic valve respectively; the shift electromagnetic valve is connected with the controller; and the knife control valve is connected with the controller. The device is adopted to ensure that a bulldozer can continuously conduct bulldozing operation.