JPS6449751A - 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
JPS6449751A
JPS6449751A JP20878387A JP20878387A JPS6449751A JP S6449751 A JPS6449751 A JP S6449751A JP 20878387 A JP20878387 A JP 20878387A JP 20878387 A JP20878387 A JP 20878387A JP S6449751 A JPS6449751 A JP S6449751A
Authority
JP
Japan
Prior art keywords
valve
pressure
oil passage
pressure regulating
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
JP20878387A
Other languages
Japanese (ja)
Other versions
JP2625747B2 (en
Inventor
Masami Sugaya
Katsumi Kono
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 JP20878387A priority Critical patent/JP2625747B2/en
Publication of JPS6449751A publication Critical patent/JPS6449751A/en
Application granted granted Critical
Publication of JP2625747B2 publication Critical patent/JP2625747B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Control Of Transmission Device (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)

Abstract

PURPOSE:To reduce a power loss by controlling an oil pressure fed to one of a pair of actuators being related to an engine output condition by means of a first pressure regulating valve, and controlling an oil pressure discharged out of the other being related to a speed ratio and transmission torque by means of a second pressure regulating valve. CONSTITUTION:The pressure of a first oil passage 80 is controlled by a first pressure regulating valve 100 being related to an engine output condition by means or a throttle valve opening detecting valve 180, while controlling the pressure of a second oil passage 82 by a second pressure regulating valve 102 being related to a speed ratio and transmission torque by means of a speed ratio detecting valve 182 and a limit valve 210. And, by turning on or off a first and second solenoid valves 272, 290, a speed change directional selector valve 262 is switched over to feed working fluid in the first oil passage 80 into either of first and second actuators 70, 72 for adjusting the effective diameter of a variable pulley while discharging working fluid out of the other into the second oil passage 82, via a flow switchover valve 264. Thereby, the responsiveness of speed change and drivability can be improved while reducing the power loss of a hydraulic pump.
JP20878387A 1987-08-21 1987-08-21 Hydraulic control device for belt-type continuously variable transmission for vehicles Expired - Fee Related JP2625747B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20878387A JP2625747B2 (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
JP20878387A JP2625747B2 (en) 1987-08-21 1987-08-21 Hydraulic control device for belt-type continuously variable transmission for vehicles

Publications (2)

Publication Number Publication Date
JPS6449751A true JPS6449751A (en) 1989-02-27
JP2625747B2 JP2625747B2 (en) 1997-07-02

Family

ID=16562030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20878387A Expired - Fee Related JP2625747B2 (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) JP2625747B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052247A (en) * 1989-08-09 1991-10-01 Toyota Jidosha Kabushiki Kaisha Hydraulic control apparatus for belt-and-pulley type continuously variable transmission, incorporating fail-safe protective means
US7496441B2 (en) * 1999-04-23 2009-02-24 Clark Equipment Company Features of main control for a power machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052247A (en) * 1989-08-09 1991-10-01 Toyota Jidosha Kabushiki Kaisha Hydraulic control apparatus for belt-and-pulley type continuously variable transmission, incorporating fail-safe protective means
US7496441B2 (en) * 1999-04-23 2009-02-24 Clark Equipment Company Features of main control for a power machine

Also Published As

Publication number Publication date
JP2625747B2 (en) 1997-07-02

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees