JPS6449753A - 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
- JPS6449753A JPS6449753A JP20878587A JP20878587A JPS6449753A JP S6449753 A JPS6449753 A JP S6449753A JP 20878587 A JP20878587 A JP 20878587A JP 20878587 A JP20878587 A JP 20878587A JP S6449753 A JPS6449753 A JP S6449753A
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- speed change
- oil pressure
- valve
- hydraulic actuator
- 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 Driving Devices And Active Controlling Of Vehicle (AREA)
- Control Of Transmission Device (AREA)
Abstract
PURPOSE:To control the tensile force of a power transmission belt with high accuracy by connecting one of a pair of hydraulic actuators to a second line oil passage by means of a bypass oil passage via a speed change directional selector valve and a throttle. CONSTITUTION:As a first solenoid valve 272 is turned on, the spool 284 of a speed change directional selector valve 262 is moved downward and an oil pressure Pl1 from a first oil passage 80 is fed into a hydraulic actuator 70 through a flow regulating valve 264 which is controlled through the duty ratio control of a second solenoid valve 290. At the same time, working fluid in a hydraulic actuator 72 is discharged out into a second line oil passage 82 via a bypass oil passage 309, a throttle 308, and further, the speed change directional selector valve 262, and held at an oil pressure Pl2 by means of a second pressure regulating valve, varying the effective diameter of a variable pulley to obtain a defined speed change ratio. On the other hand, when the hydraulic actuator 72 becomes a high pressure side, the bypass oil passage 309 is closed. Thereby, the tensile force of a power transmission belt can be controlled with high accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62208785A JP2748368B2 (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 |
---|---|---|---|
JP62208785A JP2748368B2 (en) | 1987-08-21 | 1987-08-21 | Hydraulic control device for belt-type continuously variable transmission for vehicles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6449753A true JPS6449753A (en) | 1989-02-27 |
JP2748368B2 JP2748368B2 (en) | 1998-05-06 |
Family
ID=16562065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62208785A Expired - Lifetime JP2748368B2 (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) | JP2748368B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5999161A (en) * | 1982-11-30 | 1984-06-07 | Aisin Warner Ltd | Regulator valve of hydraulic controller for stepless speed changer |
-
1987
- 1987-08-21 JP JP62208785A patent/JP2748368B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5999161A (en) * | 1982-11-30 | 1984-06-07 | Aisin Warner Ltd | Regulator valve of hydraulic controller for stepless speed changer |
Also Published As
Publication number | Publication date |
---|---|
JP2748368B2 (en) | 1998-05-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080220 Year of fee payment: 10 |