| 摘要 |
PURPOSE:To feed pressure oil, prevented from mutual interference, to plural actuators, by a method wherein plural switching valves, connected in parallel to plural pumps, are switched according to the order of priority previously determined, the switching order thereof being set depending on a control amount of each control lever. CONSTITUTION:4-5 each of switching valves 1A-1-4F-1 are connected in parallel to pumps 1-4. The plural switching valves are connected in parallel to each actuator, and after control signals for control levers 5a-5f are fed to a controller 6, and are compared and computed based on a previously set sequence, a control signal is fed to each switching valve. The switching order of priority of the switching valves 1A-1-4F-1 prevailing when one or 2 or more of the control levers 5a-5f are simultaneously controlled and the switching order depending on a control amount of the control lever are controlled. Thus, even if there is a difference between the loads on actuators, desired pressure oil can be fed without the occurrence of a mutual interference phenomenon. |
