JPS5732089A - Control unit for engine and pump of construction equipment - Google Patents
Control unit for engine and pump of construction equipmentInfo
- Publication number
- JPS5732089A JPS5732089A JP10621980A JP10621980A JPS5732089A JP S5732089 A JPS5732089 A JP S5732089A JP 10621980 A JP10621980 A JP 10621980A JP 10621980 A JP10621980 A JP 10621980A JP S5732089 A JPS5732089 A JP S5732089A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- pump
- hydraulic pump
- surbo
- control unit
- 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
- High-Pressure Fuel Injection Pump Control (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To conserve energy by reducing a tilted angle of hydraulic pump as well as the revolving number of engine when operating an actuator slowly.
CONSTITUTION: An input control unit 51 is equipped with a piston rod 42 inserted. The piston rod 42 is connected to a rider 47, which controls the angle of inclination of a hydraulic pump, through springs 41 and 43. An oil chamber 39 of a piston 40 is connected to a surbo pump 31 coupled to an engine which drives the hydraulic pump on one hand and is connected to a selector valve 34 connected to a discharge oil channel 52 of the hydraulic pump on the other hand. With this construction, the number of revolution for engine can be reduced when an operation handle is not handled or slightly operated, while the surbo pump 31 can detect the reduced number of revolution for the engine and can reduce the angle of inclination of the hydraulic pump by reducing the discharge pressure of the surbo pump. Therefore, conservation of energy can be accomplished.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10621980A JPS5732089A (en) | 1980-07-31 | 1980-07-31 | Control unit for engine and pump of construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10621980A JPS5732089A (en) | 1980-07-31 | 1980-07-31 | Control unit for engine and pump of construction equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5732089A true JPS5732089A (en) | 1982-02-20 |
Family
ID=14428030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10621980A Pending JPS5732089A (en) | 1980-07-31 | 1980-07-31 | Control unit for engine and pump of construction equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5732089A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01294921A (en) * | 1988-05-23 | 1989-11-28 | Yutani Heavy Ind Ltd | Power control method for construction machine |
| WO1991019100A1 (en) * | 1990-06-06 | 1991-12-12 | Kabushiki Kaisha Komatsu Seisakusho | Device for and method of controlling vehicle for loading work |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141402A (en) * | 1980-04-03 | 1981-11-05 | Hitachi Constr Mach Co Ltd | Control method for hydraulic system |
-
1980
- 1980-07-31 JP JP10621980A patent/JPS5732089A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141402A (en) * | 1980-04-03 | 1981-11-05 | Hitachi Constr Mach Co Ltd | Control method for hydraulic system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01294921A (en) * | 1988-05-23 | 1989-11-28 | Yutani Heavy Ind Ltd | Power control method for construction machine |
| WO1991019100A1 (en) * | 1990-06-06 | 1991-12-12 | Kabushiki Kaisha Komatsu Seisakusho | Device for and method of controlling vehicle for loading work |
| US5295353A (en) * | 1990-06-06 | 1994-03-22 | Kabushiki Kaisha Komatsu Seisakusho | Controlling arrangement for travelling work vehicle |
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