Title:
建設機械
Document Type and Number:
Japanese Patent JP6926036
Kind Code:
B2
Abstract:
To provide a construction machine capable of adjusting a speed of a hydraulic actuator.SOLUTION: A controller 41 comprises: a pilot pressure reducing control portion 44 calculating a pressure indication value P2 for reducing a pilot pressure; and a pilot pressure reducing adjustment portion 45 obtaining a correction amount ΔP for adjusting the pressure indication value P2. The pilot pressure reducing adjustment portion 45 determines that a hydraulic actuator starts operation based on an operation amount of an operation device 11, and determines that the hydraulic actuator reaches a terminal position based on a discharge pressure Pm of a hydraulic pump 22. The pilot pressure reducing adjustment portion 45 measures operation time T1 from starting of the operation to reaching to the terminal position of the hydraulic actuator, and obtains the correction amount ΔP reducing a time difference ΔT between the operation time T1 and predetermined reference time T0.SELECTED DRAWING: Figure 6
Inventors:
Daiki Aizawa
Koichi Shibata
Koichi Shibata
Application Number:
JP2018135794A
Publication Date:
August 25, 2021
Filing Date:
July 19, 2018
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
E02F9/20; E02F9/22; F15B11/08
Domestic Patent References:
| JP2010255292A |
Foreign References:
| WO2015137524A1 |
Attorney, Agent or Firm:
Hirowa Patent Office