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CONTROL METHOD OF HYDRAULIC SYSTEM OF WORK MACHINE, HYDRAULIC SYSTEM OF WORK MACHINE, AND WORK MACHINE
PROBLEM TO BE SOLVED: To reliably switch a hydraulic switch valve.SOLUTION: A hydraulic system includes a first measurement portion 321 for measuring a first lapse time at a second position 64b of a direction switch valve 64 having a first position 64a and the second position 64b, a holding portion 324 for holding the second position 64b of the direction switch valve 64 when a pilot pressure reaches a prescribed pressure before the first lapse time reaches a first prescribed time, a first switching portion 325 for switching the direction switch valve 64 from the second position 64b to the first position 64a when the pilot pressure does not reach the prescribed pressure before the first lapse time reaches the first prescribed time, a second measurement portion 327 for measuring a second lapse time at which the pilot pressure is lowered to be less than the prescribed pressure when the holding of the second position 64b by the direction switch valve 64 is detected and the pilot pressure becomes lower than the prescribed pressure, and a second switch portion 329 for switching the direction switch valve 64 from the second position 64b to the first position 64a when the second lapse time reaches a second prescribed time different from the first prescribed time.SELECTED DRAWING: Figure 1
【課題】確実に油圧切換弁を切り換える。【解決手段】第１位置６４ａ及び第２位置６４ｂを有する方向切換弁６４の第２位置６４ｂでの第１経過時間を計測する第１計測部３２１と、第１経過時間が第１所定時間に達する以前にパイロット圧が所定圧力に達していれば方向切換弁６４の第２位置６４ｂを保持する保持部３２４と、第１経過時間が第１所定時間に達する以前にパイロット圧が所定圧力に達していなければ方向切換弁６４を第２位置６４ｂから第１位置６４ａへ切り換える第１切換部３２５と、方向切換弁６４の第２位置６４ｂでの保持が検出され、且つパイロット圧が所定圧力よりも低下したときに、当該パイロット圧が所定圧力未満に低下した第２経過時間を計測する第２計測部３２７と、第２経過時間が第１所定時間とは異なる第２所定時間に達すれば、方向切換弁６４を第２位置６４ｂから第１位置６４ａへ切り換える第２切換部３２９と、を備える。【選択図】図１
CONTROL METHOD OF HYDRAULIC SYSTEM OF WORK MACHINE, HYDRAULIC SYSTEM OF WORK MACHINE, AND WORK MACHINE
PROBLEM TO BE SOLVED: To reliably switch a hydraulic switch valve.SOLUTION: A hydraulic system includes a first measurement portion 321 for measuring a first lapse time at a second position 64b of a direction switch valve 64 having a first position 64a and the second position 64b, a holding portion 324 for holding the second position 64b of the direction switch valve 64 when a pilot pressure reaches a prescribed pressure before the first lapse time reaches a first prescribed time, a first switching portion 325 for switching the direction switch valve 64 from the second position 64b to the first position 64a when the pilot pressure does not reach the prescribed pressure before the first lapse time reaches the first prescribed time, a second measurement portion 327 for measuring a second lapse time at which the pilot pressure is lowered to be less than the prescribed pressure when the holding of the second position 64b by the direction switch valve 64 is detected and the pilot pressure becomes lower than the prescribed pressure, and a second switch portion 329 for switching the direction switch valve 64 from the second position 64b to the first position 64a when the second lapse time reaches a second prescribed time different from the first prescribed time.SELECTED DRAWING: Figure 1
【課題】確実に油圧切換弁を切り換える。【解決手段】第１位置６４ａ及び第２位置６４ｂを有する方向切換弁６４の第２位置６４ｂでの第１経過時間を計測する第１計測部３２１と、第１経過時間が第１所定時間に達する以前にパイロット圧が所定圧力に達していれば方向切換弁６４の第２位置６４ｂを保持する保持部３２４と、第１経過時間が第１所定時間に達する以前にパイロット圧が所定圧力に達していなければ方向切換弁６４を第２位置６４ｂから第１位置６４ａへ切り換える第１切換部３２５と、方向切換弁６４の第２位置６４ｂでの保持が検出され、且つパイロット圧が所定圧力よりも低下したときに、当該パイロット圧が所定圧力未満に低下した第２経過時間を計測する第２計測部３２７と、第２経過時間が第１所定時間とは異なる第２所定時間に達すれば、方向切換弁６４を第２位置６４ｂから第１位置６４ａへ切り換える第２切換部３２９と、を備える。【選択図】図１
CONTROL METHOD OF HYDRAULIC SYSTEM OF WORK MACHINE, HYDRAULIC SYSTEM OF WORK MACHINE, AND WORK 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)
2016-11-10
Patent
Electronic Resource
Japanese
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