JPS54108002A - Input power controlling system for hydraulic pump - Google Patents
Input power controlling system for hydraulic pumpInfo
- Publication number
- JPS54108002A JPS54108002A JP1417478A JP1417478A JPS54108002A JP S54108002 A JPS54108002 A JP S54108002A JP 1417478 A JP1417478 A JP 1417478A JP 1417478 A JP1417478 A JP 1417478A JP S54108002 A JPS54108002 A JP S54108002A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- follow
- hydraulic pump
- pump
- input power
- 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.)
- Granted
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To devise to control the input power in a fixed level by driving a follow- up piston according to the discharge pressure of a hydraulic pump for controlling the inclining angle of a pump casing.
CONSTITUTION: When the discharge pressure of a constant-capacity hydraulic pump 1C is in a constant level, a follow-up piston 12 is driven to a proper position by discharge pressures of variable capacity hydraulic pumps 1A and 1B acting to pistons 13A and 13B as being balanced with springs 15A, 15B, 15C, 16, and 17. At this stage, since these spring powers are properly chosen, the relation between the amount and the pressure of the pump discharge shown a hyperbolic curve, that is, a characteristic curve with a constant power. A pilot piston 23 is shifted by the follow-up piston 12 for changing over the connection of flow passages, and consequently, the inclining angle of a pump casing 26 is changed by a follow-up piston 22.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1417478A JPS54108002A (en) | 1978-02-13 | 1978-02-13 | Input power controlling system for hydraulic pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1417478A JPS54108002A (en) | 1978-02-13 | 1978-02-13 | Input power controlling system for hydraulic pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54108002A true JPS54108002A (en) | 1979-08-24 |
JPS6131319B2 JPS6131319B2 (en) | 1986-07-19 |
Family
ID=11853770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1417478A Granted JPS54108002A (en) | 1978-02-13 | 1978-02-13 | Input power controlling system for hydraulic pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54108002A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4599050A (en) * | 1984-02-08 | 1986-07-08 | Kabushiki Kaisha Komatsu Seisakusho | Device for controlling displacement of variable displacement hydraulic pump |
US4613286A (en) * | 1984-12-31 | 1986-09-23 | Kabushiki Kaisha Komatsu Seisakusho | Constant torque control system for a variable displacement pump or pumps |
JPH0443876A (en) * | 1990-06-08 | 1992-02-13 | Hanix Ind Co Ltd | Output controller in hydraulic device of construction machine |
-
1978
- 1978-02-13 JP JP1417478A patent/JPS54108002A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4599050A (en) * | 1984-02-08 | 1986-07-08 | Kabushiki Kaisha Komatsu Seisakusho | Device for controlling displacement of variable displacement hydraulic pump |
US4613286A (en) * | 1984-12-31 | 1986-09-23 | Kabushiki Kaisha Komatsu Seisakusho | Constant torque control system for a variable displacement pump or pumps |
JPH0443876A (en) * | 1990-06-08 | 1992-02-13 | Hanix Ind Co Ltd | Output controller in hydraulic device of construction machine |
Also Published As
Publication number | Publication date |
---|---|
JPS6131319B2 (en) | 1986-07-19 |
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