Title:
油圧制御システム
Document Type and Number:
Japanese Patent JP4128482
Kind Code:
B2
Abstract:
A hydraulic control system is presented that includes a hydraulic actuator, an operation command unit that provides a first control operation signal, a directional control valve unit with a directional control valve that supplies pressure oil to the hydraulic actuator based on the first control operation signal, a variable displacement hydraulic pump having a discharge rate that changes in response to the first control operation signal, a differential pressure generating unit that generates a differential pressure between pressure of the hydraulic pump and oil pressure and outputs a second control operation signal indicative of the differential pressure. The hydraulic control system further includes a control quantity correcting unit that corrects the first control operation signal based on the second control operation signal, and a discharge rate control unit that controls the discharge rate of the variable displacement hydraulic pump based on the corrected first control operation signal.
Inventors:
Tetsu Matsumoto
Takashi Shinya
Masayuki Kobayashi
Takashi Shinya
Masayuki Kobayashi
Application Number:
JP2003120801A
Publication Date:
July 30, 2008
Filing Date:
April 24, 2003
Export Citation:
Assignee:
Toshiba Machine Co., Ltd.
International Classes:
F15B11/00; E02F9/22; F16D31/02; G05G9/047
Domestic Patent References:
| JP6264901A | ||||
| JP2000120604A | ||||
| JP8219104A | ||||
| JP8093705A | ||||
| JP10009204A | ||||
| JP7197907A | ||||
| JP8165682A |
Foreign References:
| WO1997003292A1 |
Attorney, Agent or Firm:
Haruo Hamada