JPS5770980A - Variable displacement hydraulic pump - Google Patents
Variable displacement hydraulic pumpInfo
- Publication number
- JPS5770980A JPS5770980A JP55147129A JP14712980A JPS5770980A JP S5770980 A JPS5770980 A JP S5770980A JP 55147129 A JP55147129 A JP 55147129A JP 14712980 A JP14712980 A JP 14712980A JP S5770980 A JPS5770980 A JP S5770980A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- switch over
- discharge conduit
- valves
- engine
- 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)
- Details Of Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To prevent occurance of engine stop, by connecting the discharge conduit of a speed sensing pump to the pressurized chamber of switch over valves, and by connecting the discharge conduit of pump elements to the piston chambers of control valves in way of switch over valves.
CONSTITUTION: A discharge conduit of a speed sensing pump P is connected to pressurized chambers of switch over valves, and the discharge conduits 7 of pump elements A are connected to piston chambers 6a of control pistons 6 provided on the actuating sides of discharging pressure of control valve units B through switch over valve 9. When the driving torque of pump exceeds the engine torque, the piston chamber 6a is communicated with the discharge conduit 7 by the switch over valve 9 in order that the discharging pressure of pump element A is reduced as spools 5 are shifted. Thereby occurrence of engine stop is prevented since the output of the pump elements A can be restrained when the rotational speed of the engine E reaches low speed range.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55147129A JPS5770980A (en) | 1980-10-20 | 1980-10-20 | Variable displacement hydraulic pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55147129A JPS5770980A (en) | 1980-10-20 | 1980-10-20 | Variable displacement hydraulic pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5770980A true JPS5770980A (en) | 1982-05-01 |
Family
ID=15423207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55147129A Pending JPS5770980A (en) | 1980-10-20 | 1980-10-20 | Variable displacement hydraulic pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5770980A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002046649A (en) * | 2000-08-02 | 2002-02-12 | Fuji Heavy Ind Ltd | Cowl panel-front bulkhead structure |
-
1980
- 1980-10-20 JP JP55147129A patent/JPS5770980A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002046649A (en) * | 2000-08-02 | 2002-02-12 | Fuji Heavy Ind Ltd | Cowl panel-front bulkhead structure |
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