JPS6487953A - Hydraulic speed change control device for automatic transmission - Google Patents
Hydraulic speed change control device for automatic transmissionInfo
- Publication number
- JPS6487953A JPS6487953A JP24627887A JP24627887A JPS6487953A JP S6487953 A JPS6487953 A JP S6487953A JP 24627887 A JP24627887 A JP 24627887A JP 24627887 A JP24627887 A JP 24627887A JP S6487953 A JPS6487953 A JP S6487953A
- Authority
- JP
- Japan
- Prior art keywords
- speed change
- low
- speed
- solenoid valve
- oil
- 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 prevent oil from deteriorating improved in its cooling quality for the inside of an automatic transmission by controlling a solenoid valve in a maximum speed shift and stopping the reduction of output pressure of a regulator valve following a change of throttle opening. CONSTITUTION:In a predetermined range, when a throttle opening is in a predetermined value or less further with a car speed in a maximum speed shift, an electronic control unit 28, being based on signals from a throttle opening sensor 30, car speed sensor 32 and a select range detecting sensor 34, inoperatively controls a solenoid valve 11, stopping a decrease of output pressure and maintaining an output of a regulator valve 4 to a fixed high pressure. While in a low throttle region, when a speed change is performed from a low speed shift to the maximum speed shift, opening the solenoid valve 11 for the fixed time before ending the speed change, an output pressure of oil of the regulator valve 4 is set to a low pressure of oil. In this way, the improvement of cooling quality in the low throttle region and the reduction of speed change shock can be promoted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24627887A JP2799453B2 (en) | 1987-09-30 | 1987-09-30 | Transmission hydraulic control unit for automatic transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24627887A JP2799453B2 (en) | 1987-09-30 | 1987-09-30 | Transmission hydraulic control unit for automatic transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6487953A true JPS6487953A (en) | 1989-04-03 |
JP2799453B2 JP2799453B2 (en) | 1998-09-17 |
Family
ID=17146159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24627887A Expired - Fee Related JP2799453B2 (en) | 1987-09-30 | 1987-09-30 | Transmission hydraulic control unit for automatic transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2799453B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5124923A (en) * | 1989-11-08 | 1992-06-23 | Aisin Seiki Kabushiki Kaisha | Retarding apparatus for automotive vehicles |
US5357444A (en) * | 1990-02-28 | 1994-10-18 | Aisin Seiki Kabushiki Kaisha | Retarding control apparatus which operates on the basis of signals such as a shift lever position signal |
-
1987
- 1987-09-30 JP JP24627887A patent/JP2799453B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5124923A (en) * | 1989-11-08 | 1992-06-23 | Aisin Seiki Kabushiki Kaisha | Retarding apparatus for automotive vehicles |
US5357444A (en) * | 1990-02-28 | 1994-10-18 | Aisin Seiki Kabushiki Kaisha | Retarding control apparatus which operates on the basis of signals such as a shift lever position signal |
US5400251A (en) * | 1990-02-28 | 1995-03-21 | Aisin Seiki Kabushiki Kaisha | Retarding control apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP2799453B2 (en) | 1998-09-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |