JPS5743043A - Hydraulic pressure controller for automatic transmission - Google Patents
Hydraulic pressure controller for automatic transmissionInfo
- Publication number
- JPS5743043A JPS5743043A JP9898581A JP9898581A JPS5743043A JP S5743043 A JPS5743043 A JP S5743043A JP 9898581 A JP9898581 A JP 9898581A JP 9898581 A JP9898581 A JP 9898581A JP S5743043 A JPS5743043 A JP S5743043A
- Authority
- JP
- Japan
- Prior art keywords
- shift down
- speed
- overdrive
- oil
- shift
- 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
- Control Of Transmission Device (AREA)
Abstract
PURPOSE: To attain a positive shift down operation of an auxiliary transmission by communicating an oil hydraulic circuit to which a line pressure is supplied upon a shift down operation with a throttle pressure circuit adapted to act upon an overdrive shift valve by means of a check valve.
CONSTITUTION: When it is desired, during running at the fourth speed, to shift down to the third speed for engine brake and an overdrive change-over switch 500 is turned off, a spool 282 is operated by an elastic force of a spring 283 to close an opening 284 so that a line pressure of an oil passage 102 is supplied into oil chambers 275, 276 of an overdrive shift valve 270 by way of an oil passage 11, a check valve 320, another oil passage 120, further check valves 340, 330, and further oil passages 121, 122 whereupon a spool 271 and a sleeve 272 are held downwardly, thereby releasing a brake 400 and engaging a clutch 370 to effect a shift down operation to the third speed.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9898581A JPS5825902B2 (en) | 1981-06-25 | 1981-06-25 | Automatic transmission hydraulic control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9898581A JPS5825902B2 (en) | 1981-06-25 | 1981-06-25 | Automatic transmission hydraulic control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5743043A true JPS5743043A (en) | 1982-03-10 |
JPS5825902B2 JPS5825902B2 (en) | 1983-05-30 |
Family
ID=14234287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9898581A Expired JPS5825902B2 (en) | 1981-06-25 | 1981-06-25 | Automatic transmission hydraulic control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5825902B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62174601U (en) * | 1986-04-24 | 1987-11-06 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0531443Y2 (en) * | 1987-10-14 | 1993-08-12 |
-
1981
- 1981-06-25 JP JP9898581A patent/JPS5825902B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62174601U (en) * | 1986-04-24 | 1987-11-06 |
Also Published As
Publication number | Publication date |
---|---|
JPS5825902B2 (en) | 1983-05-30 |
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