JPS6449759A - 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
JPS6449759A
JPS6449759A JP20879187A JP20879187A JPS6449759A JP S6449759 A JPS6449759 A JP S6449759A JP 20879187 A JP20879187 A JP 20879187A JP 20879187 A JP20879187 A JP 20879187A JP S6449759 A JPS6449759 A JP S6449759A
Authority
JP
Japan
Prior art keywords
oil pressure
continuously variable
variable transmission
speed ratio
target value
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
Application number
JP20879187A
Other languages
Japanese (ja)
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 JP20879187A priority Critical patent/JPS6449759A/en
Priority to US07/232,666 priority patent/US4867732A/en
Publication of JPS6449759A publication Critical patent/JPS6449759A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
    • F16H2061/6604—Special control features generally applicable to continuously variable gearings
    • F16H2061/6608—Control of clutches, or brakes for forward-reverse shift

Abstract

PURPOSE:To prevent oil pressure in a hydraulic actuator from improperly rising by restricting a driving signal for driving a speed change control valve by a restricting means before change in the speed ratio of a continuously variable transmission is mechanically restricted. CONSTITUTION:An electronic control device 350 receives the signals of the rotation sensors 352, 354, 356 of an engine, an input shaft, an output shaft, a throttle valve opening sensor 358, etc., calculates an actual speed ratio or the target value of the rotating speed of an input shaft 30 from a predetermined relation, and carries out the on/off control of the solenoid valves 272, 290 of an oil pressure controlling circuit so as to make an actual value agree with the target value, to control the oil pressure fed into hydraulic actuators 70, 72. Here, before the speed ratio of a belt type continuously variable transmission 16 reaches the mechanical upper-limit or lower-limit value, the determined target value is limited to the upper-limit value or the lower-limit value in the range of its change. Thereby, oil pressure in hydraulic actuators can be prevented from rising more than necessary, improving the durability of a power transmission belt while reducing the power loss of an oil pump.
JP20879187A 1987-08-21 1987-08-21 Control device for oil pressure of belt type continuously variable transmission of vehicle Pending JPS6449759A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP20879187A JPS6449759A (en) 1987-08-21 1987-08-21 Control device for oil pressure of belt type continuously variable transmission of vehicle
US07/232,666 US4867732A (en) 1987-08-21 1988-08-16 Control device for belt-and-pulley type continuously variable transmission for a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20879187A JPS6449759A (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
JPS6449759A true JPS6449759A (en) 1989-02-27

Family

ID=16562173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20879187A Pending JPS6449759A (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) JPS6449759A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06185605A (en) * 1992-12-17 1994-07-08 Toyota Motor Corp Oil pressure controlling device of vehicular belt-type continuously variable transmission
JP2007071301A (en) * 2005-09-07 2007-03-22 Jatco Ltd Oil pressure controller for belt type continuously variable transmission for vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217051A (en) * 1983-05-23 1984-12-07 Toyota Motor Corp Control for stepless speed change gear for car

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217051A (en) * 1983-05-23 1984-12-07 Toyota Motor Corp Control for stepless speed change gear for car

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06185605A (en) * 1992-12-17 1994-07-08 Toyota Motor Corp Oil pressure controlling device of vehicular belt-type continuously variable transmission
JP2007071301A (en) * 2005-09-07 2007-03-22 Jatco Ltd Oil pressure controller for belt type continuously variable transmission for vehicle

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