JPS6444347A - Method of controlling line pressure of continuously variable transmission - Google Patents
Method of controlling line pressure of continuously variable transmissionInfo
- Publication number
- JPS6444347A JPS6444347A JP19941487A JP19941487A JPS6444347A JP S6444347 A JPS6444347 A JP S6444347A JP 19941487 A JP19941487 A JP 19941487A JP 19941487 A JP19941487 A JP 19941487A JP S6444347 A JPS6444347 A JP S6444347A
- Authority
- JP
- Japan
- Prior art keywords
- line pressure
- control valve
- clutch
- pressure control
- pressure
- 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
Landscapes
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Control Of Transmission Device (AREA)
Abstract
PURPOSE:To prevent the line pressure from being excessively increased, by compensating the gear ratio until the time of clutch lock-up if the vehicle operating condition is shifted from a start mode into a drive mode so as control the line pressure so as to decrease the same. CONSTITUTION:A belt drive type continuously variable transmission 2 is composed of a primary pressure control valve 34 as a speed change control valve, a constant pressure control valve 38, a line pressure control valve 44 and a clutch pressure control valve 52 in a hydraulic circuit, and the valves 34, 44, 52 are controlled by a control section 70 through solenoid valves 42, 50, 58, respectively. The clutch pressure control valve 62 is provided so as to control the clutch pressure of a hydraulic clutch 74. In this arrangement, the control section 90 controls the solenoid valve 50 for the line pressure control valve so as to compensate the gear ratio until the time of clutch lock-up when the vehicle operating condition is shifted from a start mode into a drive mode, so as to decrease the line pressure, thereby it is possible to prevent the line pressure from being excessively increased so as to enhance the efficiency of speed change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19941487A JPS6444347A (en) | 1987-08-10 | 1987-08-10 | Method of controlling line pressure of continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19941487A JPS6444347A (en) | 1987-08-10 | 1987-08-10 | Method of controlling line pressure of continuously variable transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6444347A true JPS6444347A (en) | 1989-02-16 |
Family
ID=16407407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19941487A Pending JPS6444347A (en) | 1987-08-10 | 1987-08-10 | Method of controlling line pressure of continuously variable transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6444347A (en) |
-
1987
- 1987-08-10 JP JP19941487A patent/JPS6444347A/en active Pending
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