FLUID DRIVE DEVICE, AND FLUID CONTROL METHOD IN THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a fluid control method for improving the control accuracy when controlling a driving device by using fluid. SOLUTION: The hydraulic pressure to be supplied to a hydraulic cylinder 1 is controlled by a plurality of solenoid control valves 17 and 18 disposed in parallel in the middle of hydraulic supply pipes 15 and 16 to supply the hydraulic pressure to the hydraulic cylinder 1. The number of the control valves to be opened is determined according to the hydraulic flow required for driving the hydraulic cylinder 1, the continuous opening time to continuously open the control valves is set to be constant, and if an arbitrary control valve is opened over the continuous opening time, and the hydraulic pressure must be successively supplied, a control valve which has been closed is opened. COPYRIGHT: (C)2004,JPO&NCIPI