JPS6435172A - Hydraulic control means for automatic transmission - Google Patents
Hydraulic control means for automatic transmissionInfo
- Publication number
- JPS6435172A JPS6435172A JP19139287A JP19139287A JPS6435172A JP S6435172 A JPS6435172 A JP S6435172A JP 19139287 A JP19139287 A JP 19139287A JP 19139287 A JP19139287 A JP 19139287A JP S6435172 A JPS6435172 A JP S6435172A
- Authority
- JP
- Japan
- Prior art keywords
- range
- gear shift
- hydraulic pressure
- frictionally engaging
- condition
- 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 restrain shocks upon gear shift by detecting the condition of engagement of a frictionally engaging element in accordance with the rotational speed of a turbine in a torque converter after the gear shift range is changed over into a travel range from a no travel range so as to regulate the hydraulic pressure. CONSTITUTION:A range change-over means changes over the gear shift range of an automatic transmission into a travel range from a no travel range, and when this condition is detected by the range change-over means, a hydraulic control means feeds hydraulic pressure to frictionally engaging elements such as a clutch, a brake and the like, so that they are gradually shifted into their engagement conditions. In this phase, since the automobile is in a stop condition, the rotational speed of a turbine in a torque converter is lowered, and it comes to zero when the frictionally engaging elements fall in the engagement condition. Accordingly, the hydraulic control means sustains a relatively low hydraulic pressure until the turbine rotational speed detected by a detecting means comes to zero, and when it comes to zero, it is judged that the frictionally engaging element are engaged, and the hydraulic pressure is increased. Thus, it is possible to effectively prevent occurrence of shocks upon gear shift.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19139287A JPS6435172A (en) | 1987-07-30 | 1987-07-30 | Hydraulic control means for automatic transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19139287A JPS6435172A (en) | 1987-07-30 | 1987-07-30 | Hydraulic control means for automatic transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435172A true JPS6435172A (en) | 1989-02-06 |
Family
ID=16273839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19139287A Pending JPS6435172A (en) | 1987-07-30 | 1987-07-30 | Hydraulic control means for automatic transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435172A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04210155A (en) * | 1990-01-11 | 1992-07-31 | General Motors Corp <Gm> | Method of controlling change in automatic transmission of vehicle |
JP2002295657A (en) * | 2001-03-29 | 2002-10-09 | Aisin Aw Co Ltd | Parking managing device for vehicle |
US6971971B2 (en) * | 2002-11-01 | 2005-12-06 | Spicer Off-Highway Belgium N.V. | Method and system for an adaptation of an engagement of an automated clutch |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6185225A (en) * | 1984-10-03 | 1986-04-30 | Nissan Motor Co Ltd | Start control device for automatic transmission loading car with creep prevention unit |
-
1987
- 1987-07-30 JP JP19139287A patent/JPS6435172A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6185225A (en) * | 1984-10-03 | 1986-04-30 | Nissan Motor Co Ltd | Start control device for automatic transmission loading car with creep prevention unit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04210155A (en) * | 1990-01-11 | 1992-07-31 | General Motors Corp <Gm> | Method of controlling change in automatic transmission of vehicle |
JP2002295657A (en) * | 2001-03-29 | 2002-10-09 | Aisin Aw Co Ltd | Parking managing device for vehicle |
US6971971B2 (en) * | 2002-11-01 | 2005-12-06 | Spicer Off-Highway Belgium N.V. | Method and system for an adaptation of an engagement of an automated clutch |
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