JPS57167501A - Control circuit of fluid - Google Patents
Control circuit of fluidInfo
- Publication number
- JPS57167501A JPS57167501A JP56054123A JP5412381A JPS57167501A JP S57167501 A JPS57167501 A JP S57167501A JP 56054123 A JP56054123 A JP 56054123A JP 5412381 A JP5412381 A JP 5412381A JP S57167501 A JPS57167501 A JP S57167501A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- delivery
- valve
- variable pump
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
PURPOSE: To enable pressure control having a high responsiveness with high efficiency by carrying out flow control in a power matching method and pressure control in a valve control method by making delivery of a variable pump constant.
CONSTITUTION: During flow control, delivery of a variable pump 1 is controlled by a power matching valve 5 which is operated in response to a pressure difference between the front and the rear of a throttle valve 4, and an energy saving effect can be obtained by matching the delivery and discharge pressure with load. During pressure control, the delivery of the variable pump 1 is made constant by a minimum delivery adjusting component 32 and the variable pump 1 is caused to be operated as a stationary pump, and the pressure of a main circuit 3 is controlled by a surge pressure absorption valve 6 the pressure of which is set with a pilot relief valve 9. Then, the pressure control having a high responsiveness of high efficiency can be done.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56054123A JPS57167501A (en) | 1981-04-09 | 1981-04-09 | Control circuit of fluid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56054123A JPS57167501A (en) | 1981-04-09 | 1981-04-09 | Control circuit of fluid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57167501A true JPS57167501A (en) | 1982-10-15 |
Family
ID=12961816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56054123A Pending JPS57167501A (en) | 1981-04-09 | 1981-04-09 | Control circuit of fluid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57167501A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981900U (en) * | 1982-11-26 | 1984-06-02 | エスエムシ−株式会社 | Open/close pressure regulating valve for automatic air filling equipment |
US4949541A (en) * | 1988-02-25 | 1990-08-21 | Riva Calzoni S.P.A. | Apparatus for the feed and the speed and torque control of a hydraulic motor with variable displacement at constant pressure |
US4976106A (en) * | 1988-02-18 | 1990-12-11 | Linde Aktiengesellschaft | Load-sensing variable displacement pump controller with adjustable pressure-compensated flow control valve in feedback path |
US5243820A (en) * | 1990-07-11 | 1993-09-14 | Nippon Air Brake Kabushiki Kaisha | Hydraulic circuit with compensator valve biased with highest pressure acting on actuators |
US5279122A (en) * | 1989-08-16 | 1994-01-18 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic circuit apparatus for supplying fluid under pressure into hydraulic cylinders for work implement |
JPH0665311U (en) * | 1993-02-26 | 1994-09-16 | 株式会社セントラルユニ | Storage and delivery device for goods |
DE102005016181A1 (en) * | 2005-04-08 | 2006-10-12 | Zf Lenksysteme Gmbh | Hydraulic pumping device`s e.g. vane pump, pressuring medium flow controlling device for e.g. passenger car, has discharge valve for pressurizing medium controlled, so that constant medium pressure is made possible in supply line for load |
-
1981
- 1981-04-09 JP JP56054123A patent/JPS57167501A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981900U (en) * | 1982-11-26 | 1984-06-02 | エスエムシ−株式会社 | Open/close pressure regulating valve for automatic air filling equipment |
JPH0142166Y2 (en) * | 1982-11-26 | 1989-12-11 | ||
US4976106A (en) * | 1988-02-18 | 1990-12-11 | Linde Aktiengesellschaft | Load-sensing variable displacement pump controller with adjustable pressure-compensated flow control valve in feedback path |
US4949541A (en) * | 1988-02-25 | 1990-08-21 | Riva Calzoni S.P.A. | Apparatus for the feed and the speed and torque control of a hydraulic motor with variable displacement at constant pressure |
US5279122A (en) * | 1989-08-16 | 1994-01-18 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic circuit apparatus for supplying fluid under pressure into hydraulic cylinders for work implement |
US5243820A (en) * | 1990-07-11 | 1993-09-14 | Nippon Air Brake Kabushiki Kaisha | Hydraulic circuit with compensator valve biased with highest pressure acting on actuators |
JPH0665311U (en) * | 1993-02-26 | 1994-09-16 | 株式会社セントラルユニ | Storage and delivery device for goods |
DE102005016181A1 (en) * | 2005-04-08 | 2006-10-12 | Zf Lenksysteme Gmbh | Hydraulic pumping device`s e.g. vane pump, pressuring medium flow controlling device for e.g. passenger car, has discharge valve for pressurizing medium controlled, so that constant medium pressure is made possible in supply line for load |
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