JPS5471263A - Controlling device in oil pressure driving device - Google Patents
Controlling device in oil pressure driving deviceInfo
- Publication number
- JPS5471263A JPS5471263A JP13787577A JP13787577A JPS5471263A JP S5471263 A JPS5471263 A JP S5471263A JP 13787577 A JP13787577 A JP 13787577A JP 13787577 A JP13787577 A JP 13787577A JP S5471263 A JPS5471263 A JP S5471263A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- engine
- port
- rotational number
- controlling
- 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
- Control Of Fluid Gearings (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
PURPOSE: To provede the subject controlling device wherein a centering spring of an automatic speed change valve operating in relation to the rotational number of an engine is interlocked with a throttle valve, thereby to maintain the rotational number of the engine at a constant value.
CONSTITUTION: The port 17a of an automatic speed change valve 17 of a control circuit A is connected through a stationary orifice 19 to the exhaust side of a controlling valve 15, and the port 17b thereof is communicated with a tank 56. Further, change-over valves 17c and 17d are connected to the forward and rearward parts of the stationary orifice 19 at the exhaust side of a controlling pump 15. The setting of a centering spring 17e of the automatic speed-change valve 17 is interlocked with a throttle valve 24. The port 17e is connected to the port 18a of the POC valve 18, and the ports 18b and 18c are connected to the ports 20a and 20b of the stearing interference valve 20 through pipelines 40 and 41. When the rotational number of the engine is reduced, the supply pressure of the POC valve is reduced, and the load on the engine is decreased, and hence the rotational number of the engine ia restored to the original number.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13787577A JPS5471263A (en) | 1977-11-18 | 1977-11-18 | Controlling device in oil pressure driving device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13787577A JPS5471263A (en) | 1977-11-18 | 1977-11-18 | Controlling device in oil pressure driving device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5471263A true JPS5471263A (en) | 1979-06-07 |
Family
ID=15208732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13787577A Pending JPS5471263A (en) | 1977-11-18 | 1977-11-18 | Controlling device in oil pressure driving device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5471263A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376371A (en) * | 1979-10-09 | 1983-03-15 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic circuit for a hydraulically driven vehicle |
-
1977
- 1977-11-18 JP JP13787577A patent/JPS5471263A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376371A (en) * | 1979-10-09 | 1983-03-15 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic circuit for a hydraulically driven vehicle |
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