JPS6410828A - Fluid pressure circuit of working vehicle - Google Patents
Fluid pressure circuit of working vehicleInfo
- Publication number
- JPS6410828A JPS6410828A JP16739687A JP16739687A JPS6410828A JP S6410828 A JPS6410828 A JP S6410828A JP 16739687 A JP16739687 A JP 16739687A JP 16739687 A JP16739687 A JP 16739687A JP S6410828 A JPS6410828 A JP S6410828A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- relief
- fluid pressure
- center bypass
- 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
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To prevent damage to the operating system by lowering the fluid pressure of the operating system without lowering of the drive speed of the traveling system by a method in which a center bypass is closed and the fluid pressure rises, the set relief pressure of a relief valve is reduced. CONSTITUTION:A relief pressure automatic altering device A by which the set relief pressure of a relief valve 11 is reduced only when the fluid pressure rises with the rise of fluid pressure between an operation valve V1 for traveling and an operation valve V2 for operation in a center bypass 11 is provided. In connection with the rise of pressure of fluid in the upstream path 11a of the operation valve V2 of the center bypass 11 due to the close of the center bypass 11 when operating the valve V2 for the boom during operation, the set pressure of the relief valve 14 is more reduced than traveling period by the automatic relief pressure altering device A.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16739687A JPH0663266B2 (en) | 1987-07-03 | 1987-07-03 | Hydraulic circuit of work vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16739687A JPH0663266B2 (en) | 1987-07-03 | 1987-07-03 | Hydraulic circuit of work vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6410828A true JPS6410828A (en) | 1989-01-13 |
JPH0663266B2 JPH0663266B2 (en) | 1994-08-22 |
Family
ID=15848923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16739687A Expired - Lifetime JPH0663266B2 (en) | 1987-07-03 | 1987-07-03 | Hydraulic circuit of work vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0663266B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20160119486A (en) * | 2015-04-06 | 2016-10-14 | 두산인프라코어 주식회사 | Hydraulic brake system |
-
1987
- 1987-07-03 JP JP16739687A patent/JPH0663266B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20160119486A (en) * | 2015-04-06 | 2016-10-14 | 두산인프라코어 주식회사 | Hydraulic brake system |
Also Published As
Publication number | Publication date |
---|---|
JPH0663266B2 (en) | 1994-08-22 |
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