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CONTROL METHOD OF HYDRAULIC SYSTEM OF WORKING MACHINE, HYDRAULIC SYSTEM OF WORKING MACHINE, AND WORKING MACHINE
To surely switch a hydraulic selector valve.SOLUTION: A control method of a hydraulic system of a working machine includes: a step for detecting switching of a direction selector valve 64 capable of changing a pilot pressure applied to a hydraulic selector valve 263 switchable to a plurality of switching positions according to the pilot pressure as a pressure of a pilot oil to a first position 64a having a prescribed opening, and a second position 64b having an opening larger than the prescribed opening corresponding to the first position; a step for detecting a rate of change of the pilot pressure; a step for determining whether the direction selector valve is held at the second position or not based on the rate of change of the pilot pressure; and a step for switching the direction selector valve from the second position to the first position when the rate of change is smaller than a predetermined determination value.SELECTED DRAWING: Figure 1
【課題】確実に油圧切換弁を切り換える。【解決手段】作業機の油圧システムの制御方法は、パイロット油の圧力であるパイロット圧に応じて複数の切換位置へ切換可能な油圧切換弁２６３に付加されるパイロット圧を開度の設定によって変更可能な方向切換弁６４が、所定の開度である第１位置６４ａと、第１位置に対応する所定の開度よりも大きい開度である第２位置６４ｂとの切り換わりを検出するステップと、パイロット圧の変化率を検出するステップと、パイロット圧の変化率に基づいて、方向切換弁を第２位置で保持するか否かを判定するステップと、変化率が予め定められた判定値よりも小さいとき、方向切換弁を第２位置から第１位置へ切り換えるステップと、を備えている。【選択図】図１
CONTROL METHOD OF HYDRAULIC SYSTEM OF WORKING MACHINE, HYDRAULIC SYSTEM OF WORKING MACHINE, AND WORKING MACHINE
To surely switch a hydraulic selector valve.SOLUTION: A control method of a hydraulic system of a working machine includes: a step for detecting switching of a direction selector valve 64 capable of changing a pilot pressure applied to a hydraulic selector valve 263 switchable to a plurality of switching positions according to the pilot pressure as a pressure of a pilot oil to a first position 64a having a prescribed opening, and a second position 64b having an opening larger than the prescribed opening corresponding to the first position; a step for detecting a rate of change of the pilot pressure; a step for determining whether the direction selector valve is held at the second position or not based on the rate of change of the pilot pressure; and a step for switching the direction selector valve from the second position to the first position when the rate of change is smaller than a predetermined determination value.SELECTED DRAWING: Figure 1
【課題】確実に油圧切換弁を切り換える。【解決手段】作業機の油圧システムの制御方法は、パイロット油の圧力であるパイロット圧に応じて複数の切換位置へ切換可能な油圧切換弁２６３に付加されるパイロット圧を開度の設定によって変更可能な方向切換弁６４が、所定の開度である第１位置６４ａと、第１位置に対応する所定の開度よりも大きい開度である第２位置６４ｂとの切り換わりを検出するステップと、パイロット圧の変化率を検出するステップと、パイロット圧の変化率に基づいて、方向切換弁を第２位置で保持するか否かを判定するステップと、変化率が予め定められた判定値よりも小さいとき、方向切換弁を第２位置から第１位置へ切り換えるステップと、を備えている。【選択図】図１
CONTROL METHOD OF HYDRAULIC SYSTEM OF WORKING MACHINE, HYDRAULIC SYSTEM OF WORKING MACHINE, AND WORKING MACHINE
作業機の油圧システムの制御方法、作業機の油圧システム及び作業機
ABE TAIKI (author) / FUKUDA YUJI (author) / KONISHI HIRONARI (author) / KINUGAWA RYOSUKE (author)
2019-05-30
Patent
Electronic Resource
Japanese
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