JPS5783677A - Variable capacity type hydraulic apparatus - Google Patents
Variable capacity type hydraulic apparatusInfo
- Publication number
- JPS5783677A JPS5783677A JP55159810A JP15981080A JPS5783677A JP S5783677 A JPS5783677 A JP S5783677A JP 55159810 A JP55159810 A JP 55159810A JP 15981080 A JP15981080 A JP 15981080A JP S5783677 A JPS5783677 A JP S5783677A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- control
- plunger
- reduced
- reduced pressure
- 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
- Reciprocating Pumps (AREA)
Abstract
PURPOSE: To enable a long-run control and a constant power control by applying reduced pressure of high pressure side pressure of a hydraulic apparatus upon a control cylinder which adjudts displacement capacity of a swash plate, etc.
CONSTITUTION: A part of deliverd fluid which flows through a delivery passage 17 is taken in a connecting passage 20. After its pressure is reduced to a fixed pressure by a proportional pressure reducing valve 60, it is applied upon a back chamber 14 of a control plunger 14 via a control passage 20a. The control plunger 14 does not operate even when reduced pressure is applied upon the control plunger 14 and a swash plate 6 is kept at the maximum tilt angle. When reduced pressure exceeds a fixed pressure it overcomes pushing pressure of a bias plunger 13 and the control plunger 14 moves. Control pressure is obtained according to the characteristics of reducing valve 60. By increasing its reduced pressure ratio, a control pressure with less initial rise in proportion to the rise of high pressure side pressure and a long-run control conducted.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55159810A JPS5783677A (en) | 1980-11-12 | 1980-11-12 | Variable capacity type hydraulic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55159810A JPS5783677A (en) | 1980-11-12 | 1980-11-12 | Variable capacity type hydraulic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5783677A true JPS5783677A (en) | 1982-05-25 |
Family
ID=15701743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55159810A Pending JPS5783677A (en) | 1980-11-12 | 1980-11-12 | Variable capacity type hydraulic apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5783677A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63306287A (en) * | 1987-06-04 | 1988-12-14 | Kayaba Ind Co Ltd | Horsepower control device for piston pump |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50102904A (en) * | 1974-01-16 | 1975-08-14 | ||
JPS50152303A (en) * | 1974-05-28 | 1975-12-08 |
-
1980
- 1980-11-12 JP JP55159810A patent/JPS5783677A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50102904A (en) * | 1974-01-16 | 1975-08-14 | ||
JPS50152303A (en) * | 1974-05-28 | 1975-12-08 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63306287A (en) * | 1987-06-04 | 1988-12-14 | Kayaba Ind Co Ltd | Horsepower control device for piston pump |
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