JPS6435170A - Hydraulic drive device - Google Patents
Hydraulic drive deviceInfo
- Publication number
- JPS6435170A JPS6435170A JP18773787A JP18773787A JPS6435170A JP S6435170 A JPS6435170 A JP S6435170A JP 18773787 A JP18773787 A JP 18773787A JP 18773787 A JP18773787 A JP 18773787A JP S6435170 A JPS6435170 A JP S6435170A
- Authority
- JP
- Japan
- Prior art keywords
- main motor
- rotational speed
- valve
- servorelief
- variable
- 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
- F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
- F16H61/421—Motor capacity control by electro-hydraulic control means, e.g. using solenoid valves
Landscapes
- Control Of Fluid Gearings (AREA)
Abstract
PURPOSE:To prevent the temperature of oil from increasing, by providing a variable servorelief valve on the discharge side of a servopump, and by receiving signals indicating the output rotational speed and inlet pressure of a main motor and a vehicle speed so as to control the relief valve. CONSTITUTION:A variable servorelief valve 30 is disposed on the discharge side of a servopump 22, and a pressure sensor 46 is disposed on the discharge side of a main pump 20. Further, a rotational speed sensor 47 detects the output rotational speed of a main motor 24, and a controller 48 receives both detection signals together with a vehicle speed signal. In this arrangement, when the output rotational speed of the main motor 24 is zero while the inlet pressure of the main motor 24 is high, the controller 48 delivers a control signal to a solenoid 60 which controls the variable servorelief valve so that a high control pressure is obtained corresponding to the tilt moment of the main motor 24.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18773787A JPS6435170A (en) | 1987-07-29 | 1987-07-29 | Hydraulic drive device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18773787A JPS6435170A (en) | 1987-07-29 | 1987-07-29 | Hydraulic drive device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435170A true JPS6435170A (en) | 1989-02-06 |
Family
ID=16211309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18773787A Pending JPS6435170A (en) | 1987-07-29 | 1987-07-29 | Hydraulic drive device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435170A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021181832A (en) * | 2019-03-20 | 2021-11-25 | 株式会社クボタ | Traveling system hydraulic circuit and traveling control method |
-
1987
- 1987-07-29 JP JP18773787A patent/JPS6435170A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021181832A (en) * | 2019-03-20 | 2021-11-25 | 株式会社クボタ | Traveling system hydraulic circuit and traveling control method |
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