JPS6449755A - 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
JPS6449755A
JPS6449755A JP20878787A JP20878787A JPS6449755A JP S6449755 A JPS6449755 A JP S6449755A JP 20878787 A JP20878787 A JP 20878787A JP 20878787 A JP20878787 A JP 20878787A JP S6449755 A JPS6449755 A JP S6449755A
Authority
JP
Japan
Prior art keywords
valve
pressure
speed ratio
oil pressure
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
Application number
JP20878787A
Other languages
Japanese (ja)
Other versions
JP2687364B2 (en
Inventor
Yoshinobu Soga
Katsumi Kono
Masami Sugaya
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 JP62208787A priority Critical patent/JP2687364B2/en
Priority to EP88113523A priority patent/EP0304085B1/en
Priority to DE88113523T priority patent/DE3885540T2/en
Publication of JPS6449755A publication Critical patent/JPS6449755A/en
Priority to US07/443,845 priority patent/US4967621A/en
Application granted granted Critical
Publication of JP2687364B2 publication Critical patent/JP2687364B2/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 approximate to an ideal curve for suitably maintaining the tensile force of a power transmission belt by providing a limit valve for limiting the rise in speed ratio pressure which is fed from a speed ratio detecting valve into a second pressure regulating valve to a defined value. CONSTITUTION:An oil pressure is fed from a first pressure regulating valve 100 into one of primary side and secondary side hydraulic actuators 70, 72 via a first oil passage 80 and a flow control valve 264 by means of a speed change directional selector valve 262, while working fluid in the other is discharged out into a second oil passage 82 and held at a second line pressure Pl2 by means of a second pressure regulating valve 102. The second pressure regulating valve 102 is controlled by a speed ratio oil pressure Pe from a speed ratio detecting valve 182, and the increase in the speed ratio oil pressure Pe above an upper limit value is prevented by a limit valve 210. Thereby, the second line oil pressure can be approximated to an ideal curve for suitably maintaining the tensile force of a power transmission belt.
JP62208787A 1987-08-21 1987-08-21 Hydraulic control device for belt-type continuously variable transmission for vehicles Expired - Lifetime JP2687364B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62208787A JP2687364B2 (en) 1987-08-21 1987-08-21 Hydraulic control device for belt-type continuously variable transmission 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
DE88113523T DE3885540T2 (en) 1987-08-21 1988-08-19 Hydraulic control device for a continuously variable pulley gear for vehicles.
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
JP62208787A JP2687364B2 (en) 1987-08-21 1987-08-21 Hydraulic control device for belt-type continuously variable transmission for vehicles

Publications (2)

Publication Number Publication Date
JPS6449755A true JPS6449755A (en) 1989-02-27
JP2687364B2 JP2687364B2 (en) 1997-12-08

Family

ID=16562103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62208787A Expired - Lifetime JP2687364B2 (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) JP2687364B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56138556A (en) * 1980-03-28 1981-10-29 Aisin Warner Ltd Hydraulic pressure controlling apparatus for v-belt type stepless transmission for vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56138556A (en) * 1980-03-28 1981-10-29 Aisin Warner Ltd Hydraulic pressure controlling apparatus for v-belt type stepless transmission for vehicle

Also Published As

Publication number Publication date
JP2687364B2 (en) 1997-12-08

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