JPS6487964A - Lockup control device for automatic transmission - Google Patents
Lockup control device for automatic transmissionInfo
- Publication number
- JPS6487964A JPS6487964A JP24740587A JP24740587A JPS6487964A JP S6487964 A JPS6487964 A JP S6487964A JP 24740587 A JP24740587 A JP 24740587A JP 24740587 A JP24740587 A JP 24740587A JP S6487964 A JPS6487964 A JP S6487964A
- Authority
- JP
- Japan
- Prior art keywords
- lockup clutch
- connection force
- condition
- line pressure
- force control
- 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
Abstract
PURPOSE:To reduce a speed change shock by changing a line pressure in a hydraulic control circuit in the decreasing direction when a lockup clutch is placed in a non-opening connection force control condition by a lockup clutch connection force control means. CONSTITUTION:A decision means, which decides a lockup clutch 26 when it is placed in a non-opening connection force control condition by a lockup clutch connection force control means 41, and a line pressure control means 43, which changes a line pressure of a hydraulic control circuit in the decreasing direction when the lockup clutch is placed in the connection force controlled condition being based on this decision means, are provided in a control unit 10. Accordingly, when the lockup clutch 26 is placed in a lockup or slip condition, suppressing the torque doubling action in a turbine low speed region as compared with in the lockup clutch opening condition, because torque applied to a friction element 38 of a speed change mechanism decreases, the line pressure is decreased to a degree matching with the decrease torque. While even a load of an oil pump 32 is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24740587A JPS6487964A (en) | 1987-09-29 | 1987-09-29 | Lockup control device for automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24740587A JPS6487964A (en) | 1987-09-29 | 1987-09-29 | Lockup control device for automatic transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6487964A true JPS6487964A (en) | 1989-04-03 |
Family
ID=17162941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24740587A Pending JPS6487964A (en) | 1987-09-29 | 1987-09-29 | Lockup control device for automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6487964A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309056A (en) * | 1989-05-22 | 1990-12-25 | Toyota Motor Corp | Line oil pressure control method for automatic transmission with lock-up clutch |
| KR100708025B1 (en) * | 1999-04-12 | 2007-04-16 | 마츠시타 덴끼 산교 가부시키가이샤 | Apparatus and method for viterbi decoding |
-
1987
- 1987-09-29 JP JP24740587A patent/JPS6487964A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309056A (en) * | 1989-05-22 | 1990-12-25 | Toyota Motor Corp | Line oil pressure control method for automatic transmission with lock-up clutch |
| KR100708025B1 (en) * | 1999-04-12 | 2007-04-16 | 마츠시타 덴끼 산교 가부시키가이샤 | Apparatus and method for viterbi decoding |
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