WO2008068590A3 - Hydraulic pressure control apparatus for belt-type continuously variable transmissions - Google Patents

Hydraulic pressure control apparatus for belt-type continuously variable transmissions Download PDF

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Publication number
WO2008068590A3
WO2008068590A3 PCT/IB2007/003751 IB2007003751W WO2008068590A3 WO 2008068590 A3 WO2008068590 A3 WO 2008068590A3 IB 2007003751 W IB2007003751 W IB 2007003751W WO 2008068590 A3 WO2008068590 A3 WO 2008068590A3
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic pressure
belt
pulley
control apparatus
pressure control
Prior art date
Application number
PCT/IB2007/003751
Other languages
French (fr)
Other versions
WO2008068590A2 (en
Inventor
Yoshinobu Soga
Original Assignee
Toyota Motor Co Ltd
Yoshinobu Soga
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 Co Ltd, Yoshinobu Soga filed Critical Toyota Motor Co Ltd
Publication of WO2008068590A2 publication Critical patent/WO2008068590A2/en
Publication of WO2008068590A3 publication Critical patent/WO2008068590A3/en

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
    • F16H61/662—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 with endless flexible members
    • F16H61/66272—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 with endless flexible members characterised by means for controlling the torque transmitting capability of the gearing
    • 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
    • F16H61/662—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 with endless flexible members
    • F16H61/66254—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 with endless flexible members controlling of shifting being influenced by a signal derived from the engine and the main coupling
    • F16H61/66259—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 with endless flexible members controlling of shifting being influenced by a signal derived from the engine and the main coupling using electrical or electronical sensing or control means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

A hydraulic pressure control apparatus (200) for a belt-type CVT includes: line pressure controlling means (L2) for controlling a line pressure so as to substantially equal the higher of a target drive-pulley hydraulic pressure and a target driven-pulley hydraulic pressure, which are set in accordance with the target speed ratio of the belt-type CVT; and hydraulic pressure switching means (L3, IA) for directly applying the line pressure, without reducing it, to a hydraulic chamber of the drive pulley or the driven pulley, where the higher of the target drive-pulley hydraulic pressure and the target driven-pulley hydraulic pressure is to be applied.
PCT/IB2007/003751 2006-12-05 2007-12-04 Hydraulic pressure control apparatus for belt-type continuously variable transmissions WO2008068590A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-327790 2006-12-05
JP2006327790A JP2008138820A (en) 2006-12-05 2006-12-05 Hydraulic control device of belt continuously variable transmission

Publications (2)

Publication Number Publication Date
WO2008068590A2 WO2008068590A2 (en) 2008-06-12
WO2008068590A3 true WO2008068590A3 (en) 2009-06-11

Family

ID=39492674

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/003751 WO2008068590A2 (en) 2006-12-05 2007-12-04 Hydraulic pressure control apparatus for belt-type continuously variable transmissions

Country Status (2)

Country Link
JP (1) JP2008138820A (en)
WO (1) WO2008068590A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1039977C2 (en) * 2012-12-27 2014-06-30 Bosch Gmbh Robert HYDRAULICALLY ACTUATED CONTINUOUSLY VARIABLE TRANSMISSION.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210663A2 (en) * 1985-08-02 1987-02-04 Kabushiki Kaisha Toyota Chuo Kenkyusho Speed ratio control system for a continuously variable transmission
EP0952349A2 (en) * 1998-04-17 1999-10-27 Nissan Motor Co., Ltd. Electric pump control for a continuously variable transmission
US6126138A (en) * 1998-12-30 2000-10-03 Hamilton Sundstrand Corporation Pressure reducing valve and continuously variable transmission with control arrangement using same
DE10017402A1 (en) * 2000-04-07 2001-10-18 Zahnradfabrik Friedrichshafen Device for actuating belt gearbox has mode in pressure in second branch is set by controling pressure valve for first branch, mode in which it sets pressure by controling differential valve
EP1394444A2 (en) * 2002-08-29 2004-03-03 JATCO Ltd V-belt continuously variable transmission
JP2004084749A (en) * 2002-08-26 2004-03-18 Jatco Ltd Control device of continuously variable transmission
US20040059489A1 (en) * 2002-09-23 2004-03-25 Roger Hanggi Method of controlling a cvt speed ratio
US20050059528A1 (en) * 2003-09-11 2005-03-17 Peter Janssen Ratio control system for an automatic transmission in a vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218522A (en) 1992-03-03 1993-06-08 Hughes Aircraft Company D.C. chopper regulating method and apparatus incorporating bilateral regulating voltage path
NL1001756C2 (en) 1995-11-28 1997-05-30 Doornes Transmissie Bv Pulley.
JP2000220697A (en) 1999-02-01 2000-08-08 Toyota Motor Corp Belt for power transmission
JP3775228B2 (en) 2001-02-28 2006-05-17 トヨタ自動車株式会社 Transmission belt manufacturing method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210663A2 (en) * 1985-08-02 1987-02-04 Kabushiki Kaisha Toyota Chuo Kenkyusho Speed ratio control system for a continuously variable transmission
EP0952349A2 (en) * 1998-04-17 1999-10-27 Nissan Motor Co., Ltd. Electric pump control for a continuously variable transmission
US6126138A (en) * 1998-12-30 2000-10-03 Hamilton Sundstrand Corporation Pressure reducing valve and continuously variable transmission with control arrangement using same
DE10017402A1 (en) * 2000-04-07 2001-10-18 Zahnradfabrik Friedrichshafen Device for actuating belt gearbox has mode in pressure in second branch is set by controling pressure valve for first branch, mode in which it sets pressure by controling differential valve
JP2004084749A (en) * 2002-08-26 2004-03-18 Jatco Ltd Control device of continuously variable transmission
EP1394444A2 (en) * 2002-08-29 2004-03-03 JATCO Ltd V-belt continuously variable transmission
US20040059489A1 (en) * 2002-09-23 2004-03-25 Roger Hanggi Method of controlling a cvt speed ratio
US20050059528A1 (en) * 2003-09-11 2005-03-17 Peter Janssen Ratio control system for an automatic transmission in a vehicle

Also Published As

Publication number Publication date
JP2008138820A (en) 2008-06-19
WO2008068590A2 (en) 2008-06-12

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