JPS5744789A - Control method of variable capacity pump - Google Patents
Control method of variable capacity pumpInfo
- Publication number
- JPS5744789A JPS5744789A JP55117706A JP11770680A JPS5744789A JP S5744789 A JPS5744789 A JP S5744789A JP 55117706 A JP55117706 A JP 55117706A JP 11770680 A JP11770680 A JP 11770680A JP S5744789 A JPS5744789 A JP S5744789A
- Authority
- JP
- Japan
- Prior art keywords
- power
- pumps
- flow rate
- pump
- rate value
- 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
Abstract
PURPOSE: To improve the efficiency and operability of the pumps by a method wherein the number adopted at will of the pumps out of a plurality of the variable capacity pumps are controlled by means of pressure or power and the set flow rate value, which is smaller out of the values to be set at the pressure control and at the power control, is used for setting of the flow rate of the remaining pumps.
CONSTITUTION: Discharge flow rates of the variable capacity pumps 1, 2 and 3, all of which are driven by a single prime mover 4, are respectively controlled by actuators 126, 127 and 128 with the outputs of an operating device 125. At first the available power of the pumps 1 and 2 is calculated by subtracting the consumed power of the pump 3 from the output power of the prime mover 4. Said calculated power is input, together with the set flow rate value, to a low selector 138 to output a low set flow rate value signal, with which the pump 1 is controlled. After the pump 2 is controlled in a similar manner as described above about the pump 1, the outputs of an operating unit 153 and a controller 155 are input to a low selector 156 to output a low set flow rate value signal. In such a manner as mentioned above, the pressure and power controls are possible before and after the increase of load.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55117706A JPS5744789A (en) | 1980-08-28 | 1980-08-28 | Control method of variable capacity pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55117706A JPS5744789A (en) | 1980-08-28 | 1980-08-28 | Control method of variable capacity pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5744789A true JPS5744789A (en) | 1982-03-13 |
| JPH0331915B2 JPH0331915B2 (en) | 1991-05-09 |
Family
ID=14718288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55117706A Granted JPS5744789A (en) | 1980-08-28 | 1980-08-28 | Control method of variable capacity pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5744789A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7059125B2 (en) | 2003-09-05 | 2006-06-13 | Kobelco Construction Machinery Co., Ltd. | Hydraulic controller for construction machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53110102A (en) * | 1977-03-09 | 1978-09-26 | Uchida Yuatsu Kiki Kogyo Kk | Method of controlling output of variable pump |
-
1980
- 1980-08-28 JP JP55117706A patent/JPS5744789A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53110102A (en) * | 1977-03-09 | 1978-09-26 | Uchida Yuatsu Kiki Kogyo Kk | Method of controlling output of variable pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7059125B2 (en) | 2003-09-05 | 2006-06-13 | Kobelco Construction Machinery Co., Ltd. | Hydraulic controller for construction machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0331915B2 (en) | 1991-05-09 |
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