JPS56138560A - Controlling mechanism for clutch connected directly to torque converter of automatic transmission - Google Patents
Controlling mechanism for clutch connected directly to torque converter of automatic transmissionInfo
- Publication number
- JPS56138560A JPS56138560A JP3992180A JP3992180A JPS56138560A JP S56138560 A JPS56138560 A JP S56138560A JP 3992180 A JP3992180 A JP 3992180A JP 3992180 A JP3992180 A JP 3992180A JP S56138560 A JPS56138560 A JP S56138560A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- valve
- spool
- oil passage
- line pressure
- 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
Abstract
PURPOSE: To prevent overheating of work oil, by providing a valve capable of communicating an oil passage connected to an oil source and an oil passage for releasing a direct coupling clutch to each other when a switch valve is locked up due to sticking even after a lockup control valve has ceased to produce an output.
CONSTITUTION: When a spool 701 is moved upward in normal operation of a lockup control valve 70 and a spool 601 is fixed at an upper position due to sticking of a switch valve 60, a fail-safe valve 80 functions of interrupt a line pressure transmitted from an oil passage 91 or 96B to an oil chamber 816 via a three-way check valve 390 and an oil passage 97. Resultantly, the resultant force of a spring 800 and a line pressure supplied to an oil chamber 817 becomes greater than a line pressure supplied to an oil chamber 811 via oil passages 102, 102B, so that a spool 801 is shifted to a lower position. Therefore, a direct coupling clucth 50 is uncoupled and operation of a torque converter can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3992180A JPS56138560A (en) | 1980-03-27 | 1980-03-27 | Controlling mechanism for clutch connected directly to torque converter of automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3992180A JPS56138560A (en) | 1980-03-27 | 1980-03-27 | Controlling mechanism for clutch connected directly to torque converter of automatic transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56138560A true JPS56138560A (en) | 1981-10-29 |
| JPH0141863B2 JPH0141863B2 (en) | 1989-09-07 |
Family
ID=12566393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3992180A Granted JPS56138560A (en) | 1980-03-27 | 1980-03-27 | Controlling mechanism for clutch connected directly to torque converter of automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56138560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60211161A (en) * | 1984-07-13 | 1985-10-23 | Toyota Motor Corp | Hydraulic control unit for automatic transmission |
-
1980
- 1980-03-27 JP JP3992180A patent/JPS56138560A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60211161A (en) * | 1984-07-13 | 1985-10-23 | Toyota Motor Corp | Hydraulic control unit for automatic transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0141863B2 (en) | 1989-09-07 |
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