JPS6449752A - 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
- JPS6449752A JPS6449752A JP20878487A JP20878487A JPS6449752A JP S6449752 A JPS6449752 A JP S6449752A JP 20878487 A JP20878487 A JP 20878487A JP 20878487 A JP20878487 A JP 20878487A JP S6449752 A JPS6449752 A JP S6449752A
- Authority
- JP
- Japan
- Prior art keywords
- oil pressure
- oscillation
- valve
- vehicle
- 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 suppress the oscillation of a vehicle caused by duty ratio control by providing an oil pressure oscillation suppressing means for suppressing the oscillation or oil pressure in one or the other of a pair of hydraulic actuators which are fed with oil pressure via a first pressure regulating valve. CONSTITUTION:As a first solenoid valve 272 is turned on or off, the spool 284 of a speed change directional selector valve 262 is moved up or down by means or a pilot oil pressure Pp, to feed oil pressure Pl1 in a first oil passage 80 by means of a first pressure regulating valve into either of hydraulic actuators 70, 72 for adjusting the effective diameter of a movable pulley, via a flow control valve 264, while discharging working fluid discharged out of the other via a second oil passage 82 and a second pressure regulating valve. The speed change ratio changing speed can be obtained by duty-ratio controlling a second solenoid valve 290 and controlling the position of the spool 294 of a flow control valve 264, and pulsation caused by the duty ratio can be suppressed by means of first and second throttles 282, 304, etc. Thereby, the oscillation of oil pressure caused by the duty ratio control can be suppressed, preventing the oscillation of a vehicle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20878487A JPS6449752A (en) | 1987-08-21 | 1987-08-21 | Control device for oil pressure of belt type continuously variable transmission of vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20878487A JPS6449752A (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 |
---|---|
JPS6449752A true JPS6449752A (en) | 1989-02-27 |
Family
ID=16562047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20878487A Pending JPS6449752A (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) | JPS6449752A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011135659A1 (en) * | 2010-04-26 | 2011-11-03 | トヨタ自動車 株式会社 | Hydraulic control device for continuously variable transmission |
-
1987
- 1987-08-21 JP JP20878487A patent/JPS6449752A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011135659A1 (en) * | 2010-04-26 | 2011-11-03 | トヨタ自動車 株式会社 | Hydraulic control device for continuously variable transmission |
CN102859238A (en) * | 2010-04-26 | 2013-01-02 | 丰田自动车株式会社 | Hydraulic control device for continuously variable transmission |
JP5321736B2 (en) * | 2010-04-26 | 2013-10-23 | トヨタ自動車株式会社 | Hydraulic control device for continuously variable transmission |
CN102859238B (en) * | 2010-04-26 | 2015-01-21 | 丰田自动车株式会社 | Hydraulic control device for continuously variable transmission |
US9303762B2 (en) | 2010-04-26 | 2016-04-05 | Toyota Jidosha Kabushiki Kaisha | Hydraulic pressure controller for continuously variable transmission |
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