POWER HANDLE CONTROL METHOD AND APPARATUS OF WHEEL EXCAVATOR BY PRESSURE SENSOR OF THE STEERING UNIT

摘要

PURPOSE: A power steering-wheel control method and device using the steering-valve pressure of a wheel excavator are provided to reduce steering-wheel operating torque of a driver since a pressure sensor is installed between a steering valve and a steering pump, and a flow rate for the steering valve is controlled depending on the detection value of the pressure sensor. CONSTITUTION: A power steering-wheel control method using the steering-valve pressure of a wheel excavator is as follows. The pilot pressure of a pedal(60) is measured by a first pressure sensor(10). A first predetermined value and the measurement of the first pressure sensor are compared by a controller. If the measurement of the first pressure sensor is less than the first predetermined value, the fluid pressure between a steering pump(40) and a steering valve(30) is measured by a second pressure sensor(20). A second predetermined value and the measurement of the second pressure sensor are compared by a controller(70). If the measurement of the second pressure sensor is more than the second predetermined value, the RPM of the engine is raised to a third predetermined value by the controller, and the fluid pressure, which has been increased by the steering pump, is supplied to the steering valve.