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 vehicle

Info

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
Application number
JP20878587A
Other languages
Japanese (ja)
Other versions
JP2748368B2 (en
Inventor
Katsumi Kono
Masami Sugaya
Yoshinobu Soga
Susumu Okawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP62208785A priority Critical patent/JP2748368B2/en
Publication of JPS6449753A publication Critical patent/JPS6449753A/en
Application granted granted Critical
Publication of JP2748368B2 publication Critical patent/JP2748368B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
JP62208785A 1987-08-21 1987-08-21 Hydraulic control device for belt-type continuously variable transmission for vehicles Expired - Lifetime JP2748368B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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