Title:
油圧ユニット
Document Type and Number:
Japanese Patent JP7464860
Kind Code:
B2
Abstract:
To provide a hydraulic unit capable of determining leakage of a working fluid in hydraulic cylinders.SOLUTION: A hydraulic unit (1) includes a control portion (20) for controlling a motor (13) in a process with operations of hydraulic cylinders (3A, 3B, 3C). The control portion (20) calculates an integrated value of the product of a pressure of a working fluid discharged by a hydraulic pump (12) and a flow rate of the working fluid discharged by the hydraulic pump (12) and determines occurrence of leakage of the working fluid over a prescribed amount in the hydraulic cylinders (3A, 3B, 3C) when the integrated value is a prescribed threshold value or more.SELECTED DRAWING: Figure 1
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| WO/2015/162229 | CONTROL SYSTEM FOR A HYDRAULIC WORK MACHINE |
| JPS59133808 | DETECTION OF ANOMALY IN SERVO SYSTEM |
Inventors:
Hirokazu Nakamura
Yuya Kishi
Yoo Noguchi
Yuya Kishi
Yoo Noguchi
Application Number:
JP2022054346A
Publication Date:
April 10, 2024
Filing Date:
March 29, 2022
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F15B20/00
Domestic Patent References:
| JP2021046882A | ||||
| JP2017025982A | ||||
| JP61055405A |
Foreign References:
| US20190033162 | ||||
| US20100212306 |
Attorney, Agent or Firm:
Mayumi Kawamoto
Etsuko Isoe
Toshiyuki Yamazaki
Etsuko Isoe
Toshiyuki Yamazaki