JPS57163704A - Compound hydraulic closed circuit - Google Patents
Compound hydraulic closed circuitInfo
- Publication number
- JPS57163704A JPS57163704A JP56047291A JP4729181A JPS57163704A JP S57163704 A JPS57163704 A JP S57163704A JP 56047291 A JP56047291 A JP 56047291A JP 4729181 A JP4729181 A JP 4729181A JP S57163704 A JPS57163704 A JP S57163704A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- closed circuit
- relief valve
- controlled closed
- valve
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To eliminate the need for a booster pump by connecting a pipe at the discharge side of a charge pump in a pump-controlled closed circuit to the primary side of a low pressure relief valve and connecting the secondary side of the low pressure relief valve to a pipe at the suction side of a driving pump in a valve-controlled closed circuit. CONSTITUTION:If a load is high in a pump-controlled closed circuit, an oil flows out of a low pressure relief valve 8, passes through pipes 20, 21, opens a relief valve 21 which is disposed in a pipe at the suction side of a driving pump 10 in a valve-controlled closed circuit and cools a hydraulic pump 1. If the load is extremely low, an excess of pressure oil sent from a charge pump 2 is relieved from the low pressure relief valve 8 and cools the pump 1. In the valve- controlled closed circuit, an oil discharged in the pump-controlled closed circuit is constantly fed in the suction side pipe 21 and a relief valve 22 makes a suction pressure of the pump kept over a certain level, thereby producing no cavitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56047291A JPS57163704A (en) | 1981-04-01 | 1981-04-01 | Compound hydraulic closed circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56047291A JPS57163704A (en) | 1981-04-01 | 1981-04-01 | Compound hydraulic closed circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57163704A true JPS57163704A (en) | 1982-10-08 |
Family
ID=12771175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56047291A Pending JPS57163704A (en) | 1981-04-01 | 1981-04-01 | Compound hydraulic closed circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57163704A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4901529A (en) * | 1986-07-23 | 1990-02-20 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
| US4922715A (en) * | 1986-12-09 | 1990-05-08 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
| US4939900A (en) * | 1986-11-19 | 1990-07-10 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
-
1981
- 1981-04-01 JP JP56047291A patent/JPS57163704A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4901529A (en) * | 1986-07-23 | 1990-02-20 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
| US4939900A (en) * | 1986-11-19 | 1990-07-10 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
| US4922715A (en) * | 1986-12-09 | 1990-05-08 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS57154503A (en) | Pressurized fluid feeder | |
| JPS54162353A (en) | Hydraulic circuit for driving cargo handling apparatus | |
| EP0301886A3 (en) | Variable discharge gear pump with energy recovery | |
| JPS56129778A (en) | Pressure transforming device | |
| CA2038112A1 (en) | Charge flow priority circuit | |
| JPS57163704A (en) | Compound hydraulic closed circuit | |
| JPS57163703A (en) | Compound hydraulic closed circuit | |
| JPS5779280A (en) | Pressure liquid supplying apparatus | |
| JPS56124704A (en) | Regenerating circuit in fluidic pressure circuit | |
| JPS5718867A (en) | Pressure control valve | |
| ES8506862A1 (en) | Stroke control valve for a radial piston pump. | |
| JPS5582801A (en) | Hydraulic circuit of hydraulic traveling device | |
| GB2020749A (en) | Positive-displacement pump | |
| JPS57144345A (en) | Pump control type oil-pressure closed circuit | |
| JPS56131893A (en) | Forced supply system for lubricating oil | |
| JPS5718526A (en) | Hydraulic equipment for dump truck or the like | |
| JPS5690101A (en) | Power unit for hydraulic elevator | |
| JPS5527510A (en) | Apparatus for accumulating pressure in accumulator | |
| JPS576101A (en) | Variable crown roll | |
| JPS5692377A (en) | Pump | |
| JPS56150217A (en) | Oil-pressure circuit for back stay for pile driver | |
| FR2439313A1 (en) | deep well pump actuated from surface - has variable cylinder volume in the well connected to hydraulic accumulator and hand pump on surface | |
| JPS57103906A (en) | Pressure controlling device | |
| JPS5560703A (en) | Hydraulic vibrator valve | |
| JPS5587639A (en) | Oil pressure system for car |