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GB2327990B - Method for determining the fill time of a transmission clutch - Google Patents

Method for determining the fill time of a transmission clutch

Info

Publication number
GB2327990B
GB2327990B GB9824449A GB9824449A GB2327990B GB 2327990 B GB2327990 B GB 2327990B GB 9824449 A GB9824449 A GB 9824449A GB 9824449 A GB9824449 A GB 9824449A GB 2327990 B GB2327990 B GB 2327990B
Authority
GB
United Kingdom
Prior art keywords
speed
torque converter
determining
transmission
friction device
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 - Fee Related
Application number
GB9824449A
Other versions
GB2327990A (en
GB9824449D0 (en
Inventor
Randall M Mitchell
Todd D Creger
James R Talbott
Gregory L Williamson
Richard B League
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.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
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
Priority claimed from US08/421,724 external-priority patent/US5580332A/en
Application filed by Caterpillar Inc filed Critical Caterpillar Inc
Publication of GB9824449D0 publication Critical patent/GB9824449D0/en
Publication of GB2327990A publication Critical patent/GB2327990A/en
Application granted granted Critical
Publication of GB2327990B publication Critical patent/GB2327990B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/46—Inputs being a function of speed dependent on a comparison between speeds
    • F16H2059/465—Detecting slip, e.g. clutch slip ratio
    • F16H2059/467—Detecting slip, e.g. clutch slip ratio of torque converter
    • 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
    • F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

In an automatic transmission which includes a torque converter and a planetary transmission with both direction and speed friction devices (clutches/brakes), the time at which a fluid-operated direction friction device substantially fills with fluid during a shift in which one direction friction device is off-going and another is on-coming is determined by monitoring the input and output speeds of the torque converter. The speed ratio of the torque converter is calculated and compared a reference value. It is determined-that the on-coming direction friction device has filled when the torque converter speed ratio increases relative to the reference value. Also described is a method of determining the filling of a speed clutch by comparing the transmission output speed with an intermediate transmission speed.
GB9824449A 1995-04-13 1996-02-26 Method for determining the fill time of a transmission clutch Expired - Fee Related GB2327990B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/421,724 US5580332A (en) 1995-04-13 1995-04-13 Method for determining the fill time of a transmission clutch
GB9604025A GB2300887B (en) 1995-04-13 1996-02-26 Method for determining the fill time of a transmission clutch

Publications (3)

Publication Number Publication Date
GB9824449D0 GB9824449D0 (en) 1999-01-06
GB2327990A GB2327990A (en) 1999-02-10
GB2327990B true GB2327990B (en) 1999-04-07

Family

ID=26308804

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9824449A Expired - Fee Related GB2327990B (en) 1995-04-13 1996-02-26 Method for determining the fill time of a transmission clutch

Country Status (1)

Country Link
GB (1) GB2327990B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9062760B2 (en) 2011-04-19 2015-06-23 Mazda Motor Corporation Automatic transmission control method and control apparatus, and automatic transmission system
CN102644728B (en) * 2012-04-28 2015-07-29 山推工程机械股份有限公司 Gear-shifting control method, system and the engineering machinery for the work of drawing
CN102635689B (en) * 2012-04-28 2015-07-29 山推工程机械股份有限公司 Gear-shifting control method, system and the engineering machinery for the work of drawing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796490A (en) * 1987-12-22 1989-01-10 General Motors Corporation Event sequenced clutch-to-clutch downshift for an electronically controlled transmission
EP0435372B1 (en) * 1989-12-26 1994-11-09 General Motors Corporation Method of controlling gear change in an automatic transmission

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796490A (en) * 1987-12-22 1989-01-10 General Motors Corporation Event sequenced clutch-to-clutch downshift for an electronically controlled transmission
EP0435372B1 (en) * 1989-12-26 1994-11-09 General Motors Corporation Method of controlling gear change in an automatic transmission

Also Published As

Publication number Publication date
GB2327990A (en) 1999-02-10
GB9824449D0 (en) 1999-01-06

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Legal Events

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

Effective date: 20130226