JPS6469851A - Control device for automatic transmission - Google Patents
Control device for automatic transmissionInfo
- Publication number
- JPS6469851A JPS6469851A JP62228097A JP22809787A JPS6469851A JP S6469851 A JPS6469851 A JP S6469851A JP 62228097 A JP62228097 A JP 62228097A JP 22809787 A JP22809787 A JP 22809787A JP S6469851 A JPS6469851 A JP S6469851A
- Authority
- JP
- Japan
- Prior art keywords
- motion
- pressure regulating
- release
- oil
- speed change
- 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 optimize a timing, by a method wherein, when a speed change step is shifted through the inverse motion of two friction elements to each other, the one friction element is motioned by a switching valve as a servo mechanism for the fastening/release motion of the other and a pressure regulating valve are utilized. CONSTITUTION:During shift down from a forward second step to a first step, the one friction element 13 is motioned to the fastening side through shifting of a switching valve 37 to the oil feed side, and the other friction element 16 performs a release motion through control of an increase of the oil pressure of an oil chamber 42b on the hydraulic release side of a servo mechanism 42 by means of a pressure regulating valve 47. In this case, a timing between the pressure regulating motion of the pressure regulating valve 47 and the shifting motion to the oil feed side of the switching valve 37 is properly controlled according to an oil temperature and a car speed by means of a timing control means 50. Thereby, the excellent fastening/release motions of the two friction elements 13 and 16 are performed therebetween. A speed change shock and a sudden increase of the number of revolutions are prevented from occurring, and smooth speed change is practicable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62228097A JP2708431B2 (en) | 1987-09-11 | 1987-09-11 | Control device for automatic transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62228097A JP2708431B2 (en) | 1987-09-11 | 1987-09-11 | Control device for automatic transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6469851A true JPS6469851A (en) | 1989-03-15 |
JP2708431B2 JP2708431B2 (en) | 1998-02-04 |
Family
ID=16871141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62228097A Expired - Lifetime JP2708431B2 (en) | 1987-09-11 | 1987-09-11 | Control device for automatic transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2708431B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6241454A (en) * | 1985-08-15 | 1987-02-23 | Nissan Motor Co Ltd | Speed change control device for automatic speed change gear |
JPS63128351U (en) * | 1987-02-16 | 1988-08-22 |
-
1987
- 1987-09-11 JP JP62228097A patent/JP2708431B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6241454A (en) * | 1985-08-15 | 1987-02-23 | Nissan Motor Co Ltd | Speed change control device for automatic speed change gear |
JPS63128351U (en) * | 1987-02-16 | 1988-08-22 |
Also Published As
Publication number | Publication date |
---|---|
JP2708431B2 (en) | 1998-02-04 |
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