CA1031981A - Downshift inhibitor for a powershift transmission - Google Patents

Downshift inhibitor for a powershift transmission

Info

Publication number
CA1031981A
CA1031981A CA240,166A CA240166A CA1031981A CA 1031981 A CA1031981 A CA 1031981A CA 240166 A CA240166 A CA 240166A CA 1031981 A CA1031981 A CA 1031981A
Authority
CA
Canada
Prior art keywords
powershift transmission
downshift
inhibitor
downshift inhibitor
powershift
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
CA240,166A
Other languages
English (en)
French (fr)
Inventor
Carl A. Lentz
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Application granted granted Critical
Publication of CA1031981A publication Critical patent/CA1031981A/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
    • F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0262—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 characterised by the signals used the signals being hydraulic
    • F16H61/0274—Control units where shifting is directly initiated by the driver, e.g. semi-automatic transmissions

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Gear-Shifting Mechanisms (AREA)
CA240,166A 1974-12-23 1975-11-21 Downshift inhibitor for a powershift transmission Expired CA1031981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/535,347 US3937107A (en) 1974-12-23 1974-12-23 Downshift inhibitor for a powershift transmission

Publications (1)

Publication Number Publication Date
CA1031981A true CA1031981A (en) 1978-05-30

Family

ID=24133784

Family Applications (1)

Application Number Title Priority Date Filing Date
CA240,166A Expired CA1031981A (en) 1974-12-23 1975-11-21 Downshift inhibitor for a powershift transmission

Country Status (8)

Country Link
US (1) US3937107A (sv)
JP (1) JPS5189067A (sv)
CA (1) CA1031981A (sv)
DE (1) DE2557549A1 (sv)
FR (1) FR2296132A1 (sv)
GB (1) GB1477600A (sv)
IT (1) IT1052608B (sv)
SE (1) SE7514365L (sv)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5174169A (en) * 1974-12-23 1976-06-26 Toyota Motor Co Ltd Jidohensokukino yuatsuseigyosochi
DE2703441A1 (de) * 1977-01-28 1978-08-03 Bosch Gmbh Robert Steuereinrichtung fuer ein automatisches lastschaltgetriebe
US4164876A (en) * 1977-05-09 1979-08-21 Clark Equipment Company Downshift inhibitor circuit
JPS5850327B2 (ja) * 1977-12-02 1983-11-10 旭光学工業株式会社 広角を包括する歪曲収差の小さなズ−ムレンズ
JPS57500309A (sv) * 1980-03-12 1982-02-18
JPS56143848A (en) * 1980-04-10 1981-11-09 Nissan Motor Co Ltd Oil pressure control device for transmission
DE3103838C2 (de) * 1981-02-05 1986-04-24 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Steuereinrichtung für eine Überbrückungskupplung eines hydrokinetischen Drehmomentwandlers
US4495839A (en) * 1981-12-16 1985-01-29 Eaton Corporation Transmission shift valve
US4515255A (en) * 1982-08-06 1985-05-07 Borg-Warner Corporation Hydraulic control system for a clutch and transmission
US4608873A (en) * 1983-04-27 1986-09-02 Clark Equipment Company Elective automatic shift transmission
JPS61119855A (ja) * 1984-11-15 1986-06-07 Aisin Seiki Co Ltd セレクタバルブ
JP2733944B2 (ja) * 1988-02-17 1998-03-30 トヨタ自動車株式会社 車輛用自動変速機の油圧制御装置
JP2733945B2 (ja) * 1988-02-18 1998-03-30 トヨタ自動車株式会社 車輌用自動変速機の後進段成立禁止用油圧制御装置
DE68919149T2 (de) * 1988-08-02 1995-03-30 Toyota Motor Co Ltd Hydraulische Steuerung für automatische Fahrzeuggetriebe mit hochgenauer Rückwärtsgangsperre.
JP2755367B2 (ja) * 1988-09-16 1998-05-20 アイシン・エィ・ダブリュ株式会社 自動変速機における油圧制御装置
YU50490A (sh) * 1989-04-08 1994-01-20 Zahnradfabrik Friedrichshafen Ag. Zaustavljač zavisan od broja obrtaja motora, za sprečavanje nedopuštenih povratnih uključivanja u menjačima motornih vozila
US5305657A (en) * 1992-05-11 1994-04-26 Caterpillar Inc. Method and apparatus for controlling manual downshifting in an automatic transmission
GB2276426B (en) * 1993-03-27 1996-03-13 Acg France Control circuit for a transmission
DE4414141A1 (de) * 1994-04-22 1995-10-26 Zahnradfabrik Friedrichshafen Hydraulische Schalteinrichtung für ein mehrgängiges Fahrzeuggetriebe
JP4577733B2 (ja) * 1997-08-26 2010-11-10 ルーク ゲトリーベ−ジステーメ ゲゼルシャフト ミット ベシュレンクテル ハフツング 圧力媒体装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016769A (en) * 1955-05-18 1962-01-16 Gen Motors Corp Transmission
US3013574A (en) * 1955-12-05 1961-12-19 Gen Motors Corp Control system
US3378119A (en) * 1965-03-10 1968-04-16 Gen Motors Corp Automatic transmission control and brake means
US3459071A (en) * 1968-02-05 1969-08-05 Gen Motors Corp Transmission control
US3691872A (en) * 1971-04-29 1972-09-19 Gen Motors Corp Transmission and controls
US3793906A (en) * 1972-10-10 1974-02-26 Gen Motors Corp Main and bypass gear train transmission

Also Published As

Publication number Publication date
FR2296132B1 (sv) 1978-05-19
JPS5189067A (en) 1976-08-04
FR2296132A1 (fr) 1976-07-23
GB1477600A (en) 1977-06-22
US3937107A (en) 1976-02-10
IT1052608B (it) 1981-07-20
DE2557549A1 (de) 1976-07-01
SE7514365L (sv) 1976-06-28

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