JPS57177454A - Control device of oil pressure system - Google Patents
Control device of oil pressure systemInfo
- Publication number
- JPS57177454A JPS57177454A JP56060573A JP6057381A JPS57177454A JP S57177454 A JPS57177454 A JP S57177454A JP 56060573 A JP56060573 A JP 56060573A JP 6057381 A JP6057381 A JP 6057381A JP S57177454 A JPS57177454 A JP S57177454A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- transfer
- control valve
- tank
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
PURPOSE:To eliminate an action delay of a pump by providing a control valve controlling means which lowers the pressure of a main circuit on the high pressure in response to an operation signal so as to make the control valve return when an accelaration operation in action is transferred to a deceleration operation. CONSTITUTION:When an operation lever 10A is returned to a neutral position during an acceleration operation, a pilot pressure signal of a pilot valve 11A is made 0 and a servo valve 6 is moved to a transfer position 6B, then the pressure of a pressure acceptance section 15a of a transfer valve 15 is immediately discharged into a tank 12. On the other hand, since the discarge of the pressure of a pressure acceptance section 15b to the tank 12 is delayed due to a pressure accumulator 19 and a throttle 20, the transfer valve 15 is transferred to a transfer position 15B. Then, the presure of main circuit A or B introduced to a control valve 8 as a transfer pressure is lowered to the tank pressure and the control valve 8 resumes a return position 8B, thus a control actuator 5 moves a thrust volume variable mechanism 4 to the neutral at the miximum action speed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56060573A JPS57177454A (en) | 1981-04-23 | 1981-04-23 | Control device of oil pressure system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56060573A JPS57177454A (en) | 1981-04-23 | 1981-04-23 | Control device of oil pressure system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57177454A true JPS57177454A (en) | 1982-11-01 |
Family
ID=13146130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56060573A Pending JPS57177454A (en) | 1981-04-23 | 1981-04-23 | Control device of oil pressure system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57177454A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008267547A (en) * | 2007-04-24 | 2008-11-06 | Iseki & Co Ltd | Transmission control device of working vehicle |
-
1981
- 1981-04-23 JP JP56060573A patent/JPS57177454A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008267547A (en) * | 2007-04-24 | 2008-11-06 | Iseki & Co Ltd | Transmission control device of working vehicle |
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