GB2100372B - Improvements in or relating to steplesslyvariable ratio transmissions - Google Patents

Improvements in or relating to steplesslyvariable ratio transmissions

Info

Publication number
GB2100372B
GB2100372B GB8220153A GB8200153A GB2100372B GB 2100372 B GB2100372 B GB 2100372B GB 8220153 A GB8220153 A GB 8220153A GB 8200153 A GB8200153 A GB 8200153A GB 2100372 B GB2100372 B GB 2100372B
Authority
GB
United Kingdom
Prior art keywords
steplesslyvariable
relating
ratio transmissions
transmissions
ratio
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.)
Expired
Application number
GB8220153A
Other versions
GB2100372A (en
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.)
National Research Development Corp UK
National Research Development Corp of India
Original Assignee
National Research Development Corp UK
National Research Development Corp of India
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 National Research Development Corp UK, National Research Development Corp of India filed Critical National Research Development Corp UK
Priority to GB8220153A priority Critical patent/GB2100372B/en
Priority claimed from GB7921541A external-priority patent/GB2023753B/en
Publication of GB2100372A publication Critical patent/GB2100372A/en
Application granted granted Critical
Publication of GB2100372B publication Critical patent/GB2100372B/en
Expired 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
    • F16H61/664—Friction gearings
    • 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
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • F16H2015/383—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces with two or more sets of toroid gearings arranged in parallel
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H2037/088—Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
    • F16H2037/0886—Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft with switching means, e.g. to change ranges
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H37/086—CVT using two coaxial friction members cooperating with at least one intermediate friction member

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)
GB8220153A 1979-06-20 1979-06-20 Improvements in or relating to steplesslyvariable ratio transmissions Expired GB2100372B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8220153A GB2100372B (en) 1979-06-20 1979-06-20 Improvements in or relating to steplesslyvariable ratio transmissions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8220153A GB2100372B (en) 1979-06-20 1979-06-20 Improvements in or relating to steplesslyvariable ratio transmissions
GB7921541A GB2023753B (en) 1978-06-23 1979-06-20 Control systems for steplessly-varibale ratio transmissions

Publications (2)

Publication Number Publication Date
GB2100372A GB2100372A (en) 1982-12-22
GB2100372B true GB2100372B (en) 1983-06-02

Family

ID=26271908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8220153A Expired GB2100372B (en) 1979-06-20 1979-06-20 Improvements in or relating to steplesslyvariable ratio transmissions

Country Status (1)

Country Link
GB (1) GB2100372B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2717659B2 (en) 1986-12-11 1998-02-18 トロトラック（ディベロップメント）リミテッド transmission

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149866B (en) * 1983-11-17 1987-10-14 Nat Res Dev Continuously-variable ratio transmission
GB8332237D0 (en) * 1983-12-02 1984-01-11 Leyland Vehicles Transmission system
GB8424525D0 (en) * 1984-09-28 1984-11-07 Leyland Vehicles Variable transmission
GB8715952D0 (en) * 1987-07-07 1987-08-12 Perry F G D B Transmissions
GB8720639D0 (en) * 1987-09-02 1987-10-07 Lcvt Ltd Continuously variable transmission
GB8900210D0 (en) * 1989-01-06 1989-03-08 Fellows Thomas G Improvements in or relating to drivelines for wheeled vehicles
GB9018082D0 (en) * 1990-08-17 1990-10-03 Fellows Thomas G Improvements in or relating to transmissions of the toroidal-race,rolling-traction type
AU5124596A (en) * 1995-03-24 1996-10-16 Daewoo Motor Co., Ltd. Infinitely variable speed transmission
US6030310A (en) * 1996-04-19 2000-02-29 Torotrak (Development) Limited Variator control system
GB2312257A (en) * 1996-04-19 1997-10-22 Torotrak Dev Ltd Toroidal race variator control system varies end loading according to net pres sure
US5888160A (en) * 1996-11-13 1999-03-30 Nsk Ltd. Continuously variable transmission
DE19836558C2 (en) * 1997-08-12 2003-03-13 Nsk Ltd Infinitely adjustable toroidal gear system
US5967931A (en) * 1998-02-02 1999-10-19 Ford Global Technologies, Inc. Torodial traction transmission for all wheel vehicles
US6126567A (en) * 1998-04-06 2000-10-03 Ford Global Technologies, Inc. Toroidal traction drive transmission having multiple speed inputs to a planetary gear unit
US5921882A (en) * 1998-04-06 1999-07-13 Ford Global Technologies, Inc. Dual cavity torodial traction drive transmission having multiple speed inputs to a planetary gear unit
DE19858553A1 (en) * 1998-12-18 2000-06-21 Zahnradfabrik Friedrichshafen Infinitely-variable automotive gear reduces the load on the variator through the whole speed range, minimises noise and manufacturing costs
DE10021912A1 (en) * 2000-05-05 2001-11-08 Daimler Chrysler Ag Drive train for motor vehicle has second planet wheel with diameter such that for stepping up of variable speed gear contact point of second planet wheel with driven element corresponds to center of rotation of second planet wheel
GB2369164A (en) 2000-11-16 2002-05-22 Torotrak Dev Ltd Hydraulic control of a continuously-variable ratio transmission
US6866606B2 (en) * 2001-10-25 2005-03-15 Honda Giken Kogyo Kabushiki Kaisha Continuously variable transmission system for vehicles
DE10233091A1 (en) * 2002-07-19 2004-01-29 Daimlerchrysler Ag Change gear with a toroidal continuously variable transmission
GB0317499D0 (en) 2003-07-25 2003-08-27 Torotrak Dev Ltd Hydraulic variator control arrangement
GB2418235A (en) * 2004-09-20 2006-03-22 Torotrak Dev Ltd CVT with a compact variator which transmits less than 100% of engine power
GB0703351D0 (en) 2007-02-21 2007-03-28 Torotrak Dev Ltd Continuously variable transmission
US8968152B2 (en) 2010-03-08 2015-03-03 Transmission Cvtcorp Inc. Transmission arrangement comprising a power mixing mechanism
US11022200B2 (en) 2014-06-06 2021-06-01 Delbert Tesar Simplified parallel eccentric rotary actuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2717659B2 (en) 1986-12-11 1998-02-18 トロトラック（ディベロップメント）リミテッド transmission

Also Published As

Publication number Publication date
GB2100372A (en) 1982-12-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee