JPS6449751A - Control device for oil pressure of belt type continuously variable transmission of vehicle - Google Patents
Control device for oil pressure of belt type continuously variable transmission of vehicleInfo
- Publication number
- JPS6449751A JPS6449751A JP20878387A JP20878387A JPS6449751A JP S6449751 A JPS6449751 A JP S6449751A JP 20878387 A JP20878387 A JP 20878387A JP 20878387 A JP20878387 A JP 20878387A JP S6449751 A JPS6449751 A JP S6449751A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- oil passage
- pressure regulating
- regulating valve
- 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)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
PURPOSE:To reduce a power loss by controlling an oil pressure fed to one of a pair of actuators being related to an engine output condition by means of a first pressure regulating valve, and controlling an oil pressure discharged out of the other being related to a speed ratio and transmission torque by means of a second pressure regulating valve. CONSTITUTION:The pressure of a first oil passage 80 is controlled by a first pressure regulating valve 100 being related to an engine output condition by means or a throttle valve opening detecting valve 180, while controlling the pressure of a second oil passage 82 by a second pressure regulating valve 102 being related to a speed ratio and transmission torque by means of a speed ratio detecting valve 182 and a limit valve 210. And, by turning on or off a first and second solenoid valves 272, 290, a speed change directional selector valve 262 is switched over to feed working fluid in the first oil passage 80 into either of first and second actuators 70, 72 for adjusting the effective diameter of a variable pulley while discharging working fluid out of the other into the second oil passage 82, via a flow switchover valve 264. Thereby, the responsiveness of speed change and drivability can be improved while reducing the power loss of a hydraulic pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20878387A JP2625747B2 (en) | 1987-08-21 | 1987-08-21 | Hydraulic control device for belt-type continuously variable transmission for vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20878387A JP2625747B2 (en) | 1987-08-21 | 1987-08-21 | Hydraulic control device for belt-type continuously variable transmission for vehicles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6449751A true JPS6449751A (en) | 1989-02-27 |
JP2625747B2 JP2625747B2 (en) | 1997-07-02 |
Family
ID=16562030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20878387A Expired - Fee Related JP2625747B2 (en) | 1987-08-21 | 1987-08-21 | Hydraulic control device for belt-type continuously variable transmission for vehicles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2625747B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052247A (en) * | 1989-08-09 | 1991-10-01 | Toyota Jidosha Kabushiki Kaisha | Hydraulic control apparatus for belt-and-pulley type continuously variable transmission, incorporating fail-safe protective means |
US7496441B2 (en) * | 1999-04-23 | 2009-02-24 | Clark Equipment Company | Features of main control for a power machine |
-
1987
- 1987-08-21 JP JP20878387A patent/JP2625747B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052247A (en) * | 1989-08-09 | 1991-10-01 | Toyota Jidosha Kabushiki Kaisha | Hydraulic control apparatus for belt-and-pulley type continuously variable transmission, incorporating fail-safe protective means |
US7496441B2 (en) * | 1999-04-23 | 2009-02-24 | Clark Equipment Company | Features of main control for a power machine |
Also Published As
Publication number | Publication date |
---|---|
JP2625747B2 (en) | 1997-07-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |