JPS57116956A - Oil pressure control for hydraulic clutch type speed change gear - Google Patents
Oil pressure control for hydraulic clutch type speed change gearInfo
- Publication number
- JPS57116956A JPS57116956A JP223781A JP223781A JPS57116956A JP S57116956 A JPS57116956 A JP S57116956A JP 223781 A JP223781 A JP 223781A JP 223781 A JP223781 A JP 223781A JP S57116956 A JPS57116956 A JP S57116956A
- Authority
- JP
- Japan
- Prior art keywords
- oil pressure
- unloading
- valve
- hydraulic
- hydraulic circuit
- 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
- Gear-Shifting Mechanisms (AREA)
Abstract
PURPOSE: To make the pressure regulating valve to return precisely to its initial condition to assure smooth and accurate speed changing operations by providing two types of hydraulic unloading valve connected to the clutch hydraulic circuit.
CONSTITUTION: No.2 hydraulic unloading valve 21, accompanying the movement of the switch valve 6, unloads the oil pressure in the hydraulic circuit 4. No.1 hydraulic unloading valve 20 tends to move in the nonoperative direction by the oil pressure in the hydraulic circuit 4 and spring 22 and also tends to move in the operative direction by the oil pressure behind the control piston 9 for the pressure regulating valve 7. No.1 unloading valve 20 is brought into the unloading position by the action of No.2 unloading valve 21 and after the unloading action it continues unloading the oil pressure in the hydraulic circuit 4 until the pressure regulating valve 7 returns to its initial condition.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP223781A JPS57116956A (en) | 1981-01-09 | 1981-01-09 | Oil pressure control for hydraulic clutch type speed change gear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP223781A JPS57116956A (en) | 1981-01-09 | 1981-01-09 | Oil pressure control for hydraulic clutch type speed change gear |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57116956A true JPS57116956A (en) | 1982-07-21 |
JPS6137498B2 JPS6137498B2 (en) | 1986-08-23 |
Family
ID=11523740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP223781A Granted JPS57116956A (en) | 1981-01-09 | 1981-01-09 | Oil pressure control for hydraulic clutch type speed change gear |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57116956A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6184420A (en) * | 1984-10-03 | 1986-04-30 | Komatsu Ltd | Clutch hydraulic control device |
-
1981
- 1981-01-09 JP JP223781A patent/JPS57116956A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6184420A (en) * | 1984-10-03 | 1986-04-30 | Komatsu Ltd | Clutch hydraulic control device |
Also Published As
Publication number | Publication date |
---|---|
JPS6137498B2 (en) | 1986-08-23 |
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