Title:
HYDRAULIC ACTUATOR CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3948122
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To facilitate design of a system conformed to operability by individually controlling a meter-in flow rate flowing to the hydraulic actuator side, a bleed-off flow rate flowing to the tank side, and a meter-out flow rate flowing from the hydraulic actuator to the tank side, according to the manipulated variable.
SOLUTION: A control valve 9 is constituted as a meter-out pressure compensated flow control valve changed only in meter-out opening area according to the lever manipulated variable, while a meter-in line 14 connecting a hydraulic pump 7 to a meter-in port of the valve 9 is provided with a meter-in pressure compensated flow control valve 15, and a bleed-off line 16 connecting a bleed-off port of the valve 9 to a tank T is provided with a bleed-off pressure compensated flow control valve 17. An opening area characteristic is so set that the control valve 15 is increased in the opening area in proportion to the increase of the lever manipulated variable and that the control valve 17 is decreased. With this individual control of each flow rate, a system conformed to operability intended by an operator can be easily designed in a short time without trial-and- error work.
Inventors:
Akira Tsutsui
Application Number:
JP17496498A
Publication Date:
July 25, 2007
Filing Date:
June 22, 1998
Export Citation:
Assignee:
Kobelco Cranes Co., Ltd.
International Classes:
E02F9/20; F15B11/08; (IPC1-7): F15B11/08; E02F9/20
Domestic Patent References:
| JP64028460U | ||||
| JP63318302A | ||||
| JP9088914A | ||||
| JP7139507A | ||||
| JP10147959A | ||||
| JP6123301A | ||||
| JP11107328A |
Attorney, Agent or Firm:
Etsushi Kotani
Takao Ito
Jiro Higuchi
Muramatsu Toshiro
Takao Ito
Jiro Higuchi
Muramatsu Toshiro