A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HYDRAULIC DRIVE DEVICE OF HYDRAULIC WORK MACHINE
PROBLEM TO BE SOLVED: To enhance volume efficiency of any variable displacement hydraulic pump among a plurality of variable displacement hydraulic pumps, in specific operation with a small required flow rate of a hydraulic actuator.SOLUTION: A hydraulic drive device of a hydraulic work machine is configured to, when it is determined, based on a signal of a work mode switch 41, that an ECO mode with a small required flow rate of a hydraulic actuator is executed at an operation determination unit, cause a controller 40 to perform control of minimizing tilting of a variable displacement hydraulic pump 12c as a specific hydraulic pump and increasing tilting of the other variable displacement hydraulic pumps 12a, 12b, and also perform specific pump control of keeping directional control valves 23-26 in a neutral state, the directional control valves provided in a center bypass line 28c continuing to a discharge path 27c of the variable displacement hydraulic pump 12c.SELECTED DRAWING: Figure 2
【課題】油圧アクチュエータの要求流量が少ない特定操作時に、複数の可変容量油圧ポンプのうちのいずれかの可変容量油圧ポンプの容積効率を高めることができるようにする。【解決手段】本発明に係る油圧作業機の油圧駆動装置は、制御装置４０が、作業モードスイッチ４１の信号に基づいて操作判断部で油圧アクチュエータの要求流量の少ないＥＣＯモードが実施される状況であると判断されたときに、特定油圧ポンプである可変容量油圧ポンプ１２ｃを最小傾転とし、他の可変容量油圧ポンプ１２ａ，１２ｂの傾転を大きくする制御を行うとともに、可変容量油圧ポンプ１２ｃの吐出路２７ｃに連なるセンタバイパスライン２８ｃに設けられた方向制御弁２３〜２６を中立に保つ特定ポンプ制御を行う構成にしてある。【選択図】図２
HYDRAULIC DRIVE DEVICE OF HYDRAULIC WORK MACHINE
PROBLEM TO BE SOLVED: To enhance volume efficiency of any variable displacement hydraulic pump among a plurality of variable displacement hydraulic pumps, in specific operation with a small required flow rate of a hydraulic actuator.SOLUTION: A hydraulic drive device of a hydraulic work machine is configured to, when it is determined, based on a signal of a work mode switch 41, that an ECO mode with a small required flow rate of a hydraulic actuator is executed at an operation determination unit, cause a controller 40 to perform control of minimizing tilting of a variable displacement hydraulic pump 12c as a specific hydraulic pump and increasing tilting of the other variable displacement hydraulic pumps 12a, 12b, and also perform specific pump control of keeping directional control valves 23-26 in a neutral state, the directional control valves provided in a center bypass line 28c continuing to a discharge path 27c of the variable displacement hydraulic pump 12c.SELECTED DRAWING: Figure 2
【課題】油圧アクチュエータの要求流量が少ない特定操作時に、複数の可変容量油圧ポンプのうちのいずれかの可変容量油圧ポンプの容積効率を高めることができるようにする。【解決手段】本発明に係る油圧作業機の油圧駆動装置は、制御装置４０が、作業モードスイッチ４１の信号に基づいて操作判断部で油圧アクチュエータの要求流量の少ないＥＣＯモードが実施される状況であると判断されたときに、特定油圧ポンプである可変容量油圧ポンプ１２ｃを最小傾転とし、他の可変容量油圧ポンプ１２ａ，１２ｂの傾転を大きくする制御を行うとともに、可変容量油圧ポンプ１２ｃの吐出路２７ｃに連なるセンタバイパスライン２８ｃに設けられた方向制御弁２３〜２６を中立に保つ特定ポンプ制御を行う構成にしてある。【選択図】図２
HYDRAULIC DRIVE DEVICE OF HYDRAULIC WORK MACHINE
油圧作業機の油圧駆動装置
TAKEUCHI HIROKI (author) / ODAKA KATSUAKI (author) / KARASAWA HIDEO (author)
2018-02-22
Patent
Electronic Resource
Japanese
HYDRAULIC DRIVE DEVICE FOR ELECTRIC HYDRAULIC WORK MACHINE
| European Patent Office | 2019
HYDRAULIC DRIVE DEVICE FOR ELECTRIC HYDRAULIC WORK MACHINE
| European Patent Office | 2018