JPS6449761A - 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
- JPS6449761A JPS6449761A JP20879387A JP20879387A JPS6449761A JP S6449761 A JPS6449761 A JP S6449761A JP 20879387 A JP20879387 A JP 20879387A JP 20879387 A JP20879387 A JP 20879387A JP S6449761 A JPS6449761 A JP S6449761A
- Authority
- JP
- Japan
- Prior art keywords
- line oil
- oil pressure
- oil passage
- pressure
- line
- 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
- 230000005540 biological transmission Effects 0.000 title abstract 4
- 230000001105 regulatory effect Effects 0.000 abstract 8
- 230000001276 controlling effect Effects 0.000 abstract 1
Landscapes
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Control Of Transmission Device (AREA)
Abstract
PURPOSE:To control a second line oil pressure to be the ideal tensile force of a power transmission belt by providing a third line oil passage on the lower course of a first line oil passage and in parallel to a second line oil passage and regulating the oil pressure thereof to be lower than a first line oil pressure by means of a third pressure regulating valve. CONSTITUTION:The oil pressure of a first line oil passage 80 regulated by a first pressure regulating valve 100 and the low oil pressure of a second line oil passage 82 regulated by a second pressure regulating valve 102 are selectively fed into a pair of hydraulic actuators 70, 72 via a speed change directional selector valve 262, to carry out speed change. And, the second line oil passage 82 and a third line oil passage 92 for feeding oil pressure regulated by a third pressure regulating valve 322 into a lock-up control valve 330 are provided in parallel on the lower course of the first line oil passage 80. Thereby, even if the second line oil pressure for controlling the tensile force of a power transmission belt is lowered below the third line oil pressure, the tensile force of the power transmission belt can be ideally controlled without being affected by this, preventing a power loss.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20879387A JPS6449761A (en) | 1987-08-21 | 1987-08-21 | Control device for oil pressure of belt type continuously variable transmission of vehicle |
| DE88113523T DE3885540T2 (en) | 1987-08-21 | 1988-08-19 | Hydraulic control device for a continuously variable pulley gear for vehicles. |
| EP88113523A EP0304085B1 (en) | 1987-08-21 | 1988-08-19 | Hydraulic control device for belt-and-pulley type continuously variable transmission for a vehicle |
| US07/443,845 US4967621A (en) | 1987-08-21 | 1989-12-04 | Hydraulic control device for belt-and-pulley type continuously variable transmission for a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20879387A JPS6449761A (en) | 1987-08-21 | 1987-08-21 | Control device for oil pressure of belt type continuously variable transmission of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6449761A true JPS6449761A (en) | 1989-02-27 |
Family
ID=16562209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20879387A Pending JPS6449761A (en) | 1987-08-21 | 1987-08-21 | Control device for oil pressure of belt type continuously variable transmission of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6449761A (en) |
-
1987
- 1987-08-21 JP JP20879387A patent/JPS6449761A/en active Pending
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