ELECTRIC PROPORTIONAL CONTROL CUT-OFF VALVE OF FAN & BRAKE FOR CONSTRUCTION EQUIPMENT

摘要

PURPOSE: An electric proportional control cut-off valve of a fan-brake for construction equipment and a method for controlling the hydraulic pressure of a fan-brake using the same are provided to stably operate a brake valve by primarily charging an accumulator with hydraulic pressure. CONSTITUTION: A method for controlling the hydraulic pressure of a fan-brake using an electric proportional control cut-off valve of a fan-brake for construction equipment is as follows. An accumulator(20) is charged with hydraulic pressure generated in a hydraulic pump(10). The charging pressure of the accumulator is measured by a pressure sensor(31). The measured pressure is compared with maximum charging pressure set by the accumulator. When the measurement pressure is approached to the maximum charging pressure, the hydraulic pressure supplied to the accumulator is cut off by switching the direction of an electric proportional flow control valve(32) of a cutoff valve.