JPS641661A - Hydraulic circuit for working vehicle - Google Patents
Hydraulic circuit for working vehicleInfo
- Publication number
- JPS641661A JPS641661A JP62156884A JP15688487A JPS641661A JP S641661 A JPS641661 A JP S641661A JP 62156884 A JP62156884 A JP 62156884A JP 15688487 A JP15688487 A JP 15688487A JP S641661 A JPS641661 A JP S641661A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- valve
- pressure
- line
- speed change
- 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
- 230000006837 decompression Effects 0.000 abstract 2
Landscapes
- Power Steering Mechanism (AREA)
- Fluid-Pressure Circuits (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Abstract
PURPOSE: To prevent output drop of a power steering by suppressing oil pressure charge to the speed change hydraulic system when the power steering system is actuated in the condition that pressure oil is supplied to the speed change hydraulic system.
CONSTITUTION: A pump 24 is connected with No.1 oil line a for supply of oil presssure to the speed change hydraulic system and No.2 oil line b for supply of pressure oil to the PS system in such a way as parallelly No.1 flow line selector valve 31, No.2 oil path selector valve 32, check valve 33, and decompression valve 34 are connected in series in this No.1 oil line a. Downstream of the decompression valve 34 a control valve 22 is connected through a pressure adjusting valve 23. When the PS system is in service, the steering load raises the circuit pressure of No.2 oil line b, and on the basis thereof an opening/ closing valve incorporated in the pilot circuit of No.1 flow line selector valve 31 is closed, and switching of the charge condition into No.1 oil line a is hindered to prevent the PS system output from dropping.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62156884A JPS641661A (en) | 1987-06-24 | 1987-06-24 | Hydraulic circuit for working vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62156884A JPS641661A (en) | 1987-06-24 | 1987-06-24 | Hydraulic circuit for working vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH011661A JPH011661A (en) | 1989-01-06 |
JPS641661A true JPS641661A (en) | 1989-01-06 |
Family
ID=15637497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62156884A Pending JPS641661A (en) | 1987-06-24 | 1987-06-24 | Hydraulic circuit for working vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS641661A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0374922U (en) * | 1989-11-27 | 1991-07-26 |
-
1987
- 1987-06-24 JP JP62156884A patent/JPS641661A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0374922U (en) * | 1989-11-27 | 1991-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0597109A4 (en) | Hydraulically driving system. | |
EP0402474A4 (en) | Service valve circuit in a hydraulic excavator | |
CA2133267A1 (en) | Valve Control Unit for Hydraulic Actuator | |
JPS56138554A (en) | Hydraulic pressure controlling apparatus for automatic transmission for vehicle | |
JPS641661A (en) | Hydraulic circuit for working vehicle | |
JPS5766243A (en) | Liquid pressure circuit for construction machinery | |
JPS56143803A (en) | Fluid controller | |
JPS57201434A (en) | Oil-pressure circuit for hydraulic shovel | |
EP0440801A4 (en) | Hydraulic circuit | |
JPS54156985A (en) | Safety device of hydraulic circuit having a plurality of actuators | |
JPS5659003A (en) | Oil pressure controller | |
JPS5481422A (en) | Injection timing equipment of distributer type fuel injection pump | |
JPS5751577A (en) | Power steering device | |
JPS57186601A (en) | Hydraulic sudden change preventing device of hydraulic driving system | |
JPS54135971A (en) | Impact absorber of oil pressure type stepless change gear | |
JPS56153102A (en) | Decompression circuit for cylinder | |
JPS5740106A (en) | Hydraulic pressure system controller | |
JPS5751006A (en) | Composite control valve for conflluence | |
JPS57107403A (en) | Hydraulic control unit | |
JPS57116908A (en) | Fluid equipment | |
JPS54117904A (en) | Hydraulic device | |
JPS57116903A (en) | Fluid equipment | |
JPS5761121A (en) | Oil pressure circuit for construction machinery | |
JPS5747002A (en) | Flow supplying method by variable discharge pump | |
ES8302222A1 (en) | Hydraulic circuit selector with flow control. |