JPS5565755A - Speed change ratio control method and device of stepless speed change gear for automobile - Google Patents

Speed change ratio control method and device of stepless speed change gear for automobile

Info

Publication number
JPS5565755A
JPS5565755A JP14638179A JP14638179A JPS5565755A JP S5565755 A JPS5565755 A JP S5565755A JP 14638179 A JP14638179 A JP 14638179A JP 14638179 A JP14638179 A JP 14638179A JP S5565755 A JPS5565755 A JP S5565755A
Authority
JP
Japan
Prior art keywords
speed change
automobile
control method
ratio control
change gear
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.)
Granted
Application number
JP14638179A
Other languages
English (en)
Other versions
JPH0419410B2 (ja
Inventor
Deurusen Petorusu Hendorik Ban
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.)
Bosch Transmission Technology BV
Original Assignee
Van Doornes Transmissie BV
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 Van Doornes Transmissie BV filed Critical Van Doornes Transmissie BV
Publication of JPS5565755A publication Critical patent/JPS5565755A/ja
Publication of JPH0419410B2 publication Critical patent/JPH0419410B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/66Control 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
    • F16H61/662Control 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
    • F16H61/66254Control 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
    • F16H61/66263Control 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 only hydraulical and mechanical sensing or control means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Transmissions By Endless Flexible Members (AREA)
JP14638179A 1978-11-13 1979-11-12 Speed change ratio control method and device of stepless speed change gear for automobile Granted JPS5565755A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7811192A NL7811192A (nl) 1978-11-13 1978-11-13 Werkwijze en inrichting voor het regelen van een trap- loos variabele transmissie van een motorvoertuig.

Publications (2)

Publication Number Publication Date
JPS5565755A true JPS5565755A (en) 1980-05-17
JPH0419410B2 JPH0419410B2 (ja) 1992-03-30

Family

ID=19831881

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14638179A Granted JPS5565755A (en) 1978-11-13 1979-11-12 Speed change ratio control method and device of stepless speed change gear for automobile

Country Status (9)

Country Link
US (1) US4369675A (ja)
EP (1) EP0011342B1 (ja)
JP (1) JPS5565755A (ja)
AR (1) AR219839A1 (ja)
AT (1) ATE6690T1 (ja)
AU (1) AU532327B2 (ja)
BR (1) BR7907334A (ja)
DE (1) DE2966802D1 (ja)
NL (1) NL7811192A (ja)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161347A (en) * 1981-03-28 1982-10-04 Nissan Motor Co Ltd Hydraulic control unit in v-belt stepless speed change gear
JPS5842862A (ja) * 1981-08-28 1983-03-12 バン・ド−ルネズ・トランズミツシ−・ビ−・ブイ 変速装置
JPS59131063A (ja) * 1982-09-16 1984-07-27 バン・ド−ルネズ・トランズミツシ−・ビ−・ブイ・ 自動車両用変速機
US4512751A (en) * 1981-03-28 1985-04-23 Nissan Motor Company, Limited Method and system for controlling continuously variable v-belt transmission
JPS60104851A (ja) * 1983-11-10 1985-06-10 Mazda Motor Corp 無段変速機の制御装置
US4536171A (en) * 1982-05-14 1985-08-20 Nissan Motor Co., Ltd. Method and apparatus for controlling continuously variable transmission
US4543077A (en) * 1981-03-28 1985-09-24 Nissan Motor Co., Ltd. Method and apparatus for controlling continuously variable V-belt transmission
US4605112A (en) * 1982-10-09 1986-08-12 Fuji Jukogyo Kabushiki Kaisha Control system for an infinitely variable transmission with an electromagnetic powder clutch
US4724724A (en) * 1986-01-08 1988-02-16 Fuji Jukogyo Kabushiki Kaisha System for controlling line pressure of a continuously variable transmission for a motor vehicle
EP0289024A2 (en) * 1987-04-30 1988-11-02 Honda Giken Kogyo Kabushiki Kaisha Belt-and-pulley type continuously variable transmission
US4782934A (en) * 1986-01-07 1988-11-08 Fuji Jukogyo Kabushiki Kaisha Control system for a continuously variable transmission
JPS63280955A (ja) * 1987-05-12 1988-11-17 Honda Motor Co Ltd 無段変速機の変速比制御方法および変速比制御装置
JP2000179664A (ja) * 1998-12-16 2000-06-27 Luk Getriebe Syst Gmbh 自動車

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5747059A (en) * 1980-09-04 1982-03-17 Aisin Warner Ltd Torque ratio detecting mechanism of v belt type stepless transmission gear
US4403974A (en) * 1980-11-07 1983-09-13 General Motors Corporation Position control mechanism for a variable drive ratio pulley system
IT1135352B (it) * 1981-02-06 1986-08-20 Alfa Romeo Spa Cambio di velocita' automatico continuo per autoveicoli
JPS57171154A (en) * 1981-04-11 1982-10-21 Nissan Motor Co Ltd V-belt type stepless speed changer
EP0073475B1 (en) * 1981-08-27 1988-02-03 Nissan Motor Co., Ltd. Control apparatus and method for engine-continuously variable transmission
NL173785C (nl) * 1981-10-05 1984-03-01 Doornes Transmissie Bv Inrichting voor het regelen van een overbrengingsverhouding van een traploos variabele drijfriemoverbrenging.
NL189731C (nl) * 1982-02-08 1993-07-01 Honda Motor Co Ltd Variabele transmissie.
JPS58207561A (ja) * 1982-05-27 1983-12-03 Honda Motor Co Ltd 自動変速プ−リ
US4475416A (en) * 1982-07-27 1984-10-09 Borg-Warner Corporation Continuously variable transmission down shift control
US4501172A (en) * 1982-08-16 1985-02-26 Excelermatic Inc. Hydraulic speed control arrangement for an infinitely variable transmission
JPH066974B2 (ja) * 1982-10-22 1994-01-26 日産自動車株式会社 Vベルト式無段変速機の油圧制御装置
JPS59106754A (ja) * 1982-12-09 1984-06-20 Nissan Motor Co Ltd Vベルト式無段変速機の油圧制御装置
DE3307629A1 (de) * 1983-03-04 1984-09-06 Volkswagenwerk Ag, 3180 Wolfsburg Steuerungseinrichtung
JPS59175664A (ja) * 1983-03-23 1984-10-04 Fuji Heavy Ind Ltd 無段変速機の変速制御装置
JPS6030855A (ja) * 1983-07-30 1985-02-16 Mazda Motor Corp 無段変速機の制御装置
JPS6053256A (ja) * 1983-08-31 1985-03-26 Fuji Heavy Ind Ltd 無段変速機のキックダウン制御装置
JPS6057047A (ja) * 1983-09-09 1985-04-02 Fuji Heavy Ind Ltd 無段変速機の変速特性制御装置
JPS6060361A (ja) * 1983-09-10 1985-04-06 Fuji Heavy Ind Ltd 無段変速機のライン圧制御装置
IT1169852B (it) * 1983-10-17 1987-06-03 Piaggio & C Spa Dispositivo di controllo della regolazione di una trasmissione automatica
DE3340645A1 (de) * 1983-11-10 1985-05-30 Daimler-Benz Ag, 7000 Stuttgart Schalt- und steuervorrichtung fuer ein zum antrieb eines kraftfahrzeuges verwendetes antriebsaggregat mit einem stufenlosen wechselgetriebe
JPS60125447A (ja) * 1983-11-30 1985-07-04 富士重工業株式会社 無段変速機の変速比制御装置
JPS60132161A (ja) * 1983-12-21 1985-07-15 Fuji Heavy Ind Ltd 無段変速機の変速比検出装置
JPS60159454A (ja) * 1984-01-30 1985-08-20 Fuji Heavy Ind Ltd 無段変速機の変速制御装置
JPS60159456A (ja) * 1984-01-30 1985-08-20 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPS60161222A (ja) * 1984-01-31 1985-08-22 Fuji Heavy Ind Ltd 車両用電磁式クラツチの制御装置
NL8400296A (nl) * 1984-02-01 1985-09-02 Doornes Transmissie Bv Traploos variabele overbrenging.
US4551119A (en) * 1984-02-14 1985-11-05 Toyota Jidosha Kabushiki Kaisha Hydraulic apparatus for a continuously variable transmission
JPS60222651A (ja) * 1984-04-20 1985-11-07 Fuji Heavy Ind Ltd 無段変速機の制御装置
US4592457A (en) * 1984-05-16 1986-06-03 Van Doorne's Transmissie B.V. Infinitely variable V-belt transmission for a motor vehicle
JPS6152456A (ja) * 1984-08-17 1986-03-15 Fuji Heavy Ind Ltd 無段変速機の変速制御装置
NL8403461A (nl) * 1984-11-13 1986-06-02 Doornes Transmissie Bv Traploos variabele overbrenging.
JPH0621639B2 (ja) * 1985-03-26 1994-03-23 トヨタ自動車株式会社 ベルト式無段変速機の油圧制御装置
JPS624955A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPS624954A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPS624645A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPS624647A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPS624640A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPS624957A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPS624958A (ja) * 1985-06-29 1987-01-10 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPH0624895B2 (ja) * 1985-08-30 1994-04-06 富士重工業株式会社 無段変速機のライン圧制御装置
JPS6252261A (ja) * 1985-08-30 1987-03-06 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPS6252264A (ja) * 1985-08-30 1987-03-06 Fuji Heavy Ind Ltd 無段変速機の油圧制御装置
JPS6268141A (ja) * 1985-09-20 1987-03-28 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPS6277241A (ja) 1985-09-30 1987-04-09 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPH0657508B2 (ja) * 1985-11-18 1994-08-03 富士重工業株式会社 無段変速機の制御装置
JPS62116320A (ja) * 1985-11-18 1987-05-27 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPS62122836A (ja) * 1985-11-22 1987-06-04 Fuji Heavy Ind Ltd 無段変速機の制御装置
JPS63115937A (ja) * 1986-10-30 1988-05-20 Fuji Heavy Ind Ltd 無段変速機用vベルト
NL8700626A (nl) * 1987-03-17 1988-10-17 Doornes Transmissie Bv Regelinrichting voor een traploos variabele voertuigtransmissie.
JPS63275850A (ja) * 1987-04-30 1988-11-14 Fuji Heavy Ind Ltd 無段変速機の変速制御装置
US4824424A (en) * 1987-08-24 1989-04-25 Fuji Jukogyo Kabushiki Kaisha Belt for a belt drive device
DE3803201A1 (de) * 1988-02-04 1989-08-17 Ford Werke Ag Steuerventilanordnung fuer ein stufenlos regelbares umschlingungsgetriebe
NL8800315A (nl) * 1988-02-10 1989-09-01 Doornes Transmissie Bv Traploos variabele overbrenging.
US5004450A (en) * 1988-11-04 1991-04-02 Fuji Jukogyo Kabushiki Kaisha Belt for a continuously variable transmission
JP2785386B2 (ja) * 1989-09-30 1998-08-13 スズキ株式会社 ミッションのオイル通路
NL9100391A (nl) * 1991-03-05 1992-10-01 Doornes Transmissie Bv Continu variabele transmissie voorzien van een regelbare pomp.
NL9401747A (nl) * 1994-10-21 1996-06-03 Doornes Transmissie Bv Werkwijze en inrichting voor het regelen van de overbrengingsverhouding van een continu variabele transmissie.
DE19546293B4 (de) * 1994-12-15 2009-11-26 Luk Gs Verwaltungs Kg Antriebseinheit mit einem stufenlos einstellbaren Kegelscheibenumschlingungsgetriebe
JP5037954B2 (ja) * 2007-01-15 2012-10-03 ヤマハ発動機株式会社 ベルト式無段変速機および車両
NL1039925C2 (nl) * 2012-12-03 2014-06-04 Gear Chain Ind Bv Stelsel voor het regelen van een continu variabele transmissie.
CN110985624A (zh) * 2019-12-10 2020-04-10 江苏大学 一种基于无级变速机构实现惯质系数连续可调的液力式惯容器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596528A (en) * 1968-12-24 1971-08-03 Reimers Getriebe Ag Infinitely variable cone pulley transmission
US3600961A (en) * 1968-12-24 1971-08-24 Reimers Getriebe Ag Infinitely variable cone pulley transmission
JPS5298861A (en) * 1976-02-09 1977-08-19 Doornes Transmissie Bv Method of controlling stepless variable transmission gear and device therefor

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA599669A (en) * 1960-06-14 M. Rockwood Albert Power transmission control
GB878850A (en) * 1957-05-11 1961-10-04 Zahnradfabrik Friedrichshafen Improvements in and relating to apparatus for the automatic regulation of infinitely variable automobile gears
CH366458A (de) * 1958-01-24 1962-12-31 Doorne Hubertus Josephus Dr Va Motorfahrzeug mit einem Vergasermotor, wobei der Antrieb des Fahrzeuges über ein automatisch gesteuertes, stufenlos verstellbares Keilriemengetriebe erfolgt
DE1165961B (de) * 1958-12-23 1964-03-19 Berlin Luebecker Maschinenfabr Kraftuebertragungsvorrichtung fuer Wickelmaschinen
FR1232550A (fr) * 1959-04-23 1960-10-10 Renault Gouverneur automatique pour transmission à variateur continu
DE1254981C2 (de) * 1960-08-04 1973-03-01 Piv Antrieb Reimers Kg Werner Steuereinrichtung fuer das stufenlos verstellbare Wechselgetriebe eines Antriebsaggregates, insbesondere fuer Kraftfahrzeuge
CH412593A (de) * 1961-08-17 1966-04-30 Doorne S Automobielfabriek N V Kraftfahrzeug mit Vergasermotor und einem Keilriemengetriebe
US3115049A (en) * 1961-12-15 1963-12-24 Ford Motor Co Transmission control system
FR86033E (fr) * 1964-06-29 1965-11-26 Citroen Sa Andre Dispositif de régulation pour la conduite de véhicules automobiles munis de variateurs de vitesse
US3368426A (en) * 1965-03-12 1968-02-13 Reimers Getriebe A G Control mechanism for engine combined with infinitely variable transmission
DE1655558C3 (de) * 1966-10-20 1973-12-20 Volkswagenwerk Ag, 3180 Wolfsburg Hydraulische Steuervorrichtung fur ein Kraftfahrzeug Wechselgetriebe
NL6716741A (ja) * 1967-12-08 1969-06-10
DE1816950C3 (de) * 1968-12-24 1971-06-03 Piv Antrieb Reimers Kg Werner Kegelscheiben-Umschlingungsgetriebe
DE2301776B2 (de) * 1973-01-15 1976-12-02 P.I.V. Antrieb Werner Reimers Kg, 6380 Bad Homburg Steuereinrichtung fuer einen aus einer brennkraftmaschine und motor und einem von dieser angetriebenen stufenlos einstellbarem zugorgangetriebe bestehenden fahrantrieb
DE2322818A1 (de) * 1973-05-05 1974-11-21 Bosch Gmbh Robert Vorrichtung zur erzeugung eines lastund drehzahlabhaengigen schaltdruckes in fahrzeuggetrieben
DE2329364A1 (de) * 1973-06-08 1975-01-02 Bosch Gmbh Robert Automatisches getriebe fuer kraftfahrzeuge
JPS5922105B2 (ja) * 1975-06-30 1984-05-24 隆之 宮尾 無段変速機の制御方法
NL162183C (nl) * 1976-02-09 1980-04-15 Doornes Transmissie Bv Traploos variabele aandrijving.
FR2356851A1 (fr) * 1976-07-02 1978-01-27 Peugeot Perfectionnement a la commande d'une boite de vitesses automatique sur un vehicule automobile
IT1072036B (it) * 1976-11-24 1985-04-10 Sira Circzito di controllo a due andature per variatori automatici di rapporto a cinghia trapezoidale particolarmente per autoveicoli

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596528A (en) * 1968-12-24 1971-08-03 Reimers Getriebe Ag Infinitely variable cone pulley transmission
US3600961A (en) * 1968-12-24 1971-08-24 Reimers Getriebe Ag Infinitely variable cone pulley transmission
JPS5298861A (en) * 1976-02-09 1977-08-19 Doornes Transmissie Bv Method of controlling stepless variable transmission gear and device therefor

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512751A (en) * 1981-03-28 1985-04-23 Nissan Motor Company, Limited Method and system for controlling continuously variable v-belt transmission
US4543077A (en) * 1981-03-28 1985-09-24 Nissan Motor Co., Ltd. Method and apparatus for controlling continuously variable V-belt transmission
JPS57161347A (en) * 1981-03-28 1982-10-04 Nissan Motor Co Ltd Hydraulic control unit in v-belt stepless speed change gear
JPS6342147B2 (ja) * 1981-03-28 1988-08-22 Nissan Motor
JPH0233900B2 (ja) * 1981-08-28 1990-07-31 Doornes Transmissie Bv
JPS5842862A (ja) * 1981-08-28 1983-03-12 バン・ド−ルネズ・トランズミツシ−・ビ−・ブイ 変速装置
US4536171A (en) * 1982-05-14 1985-08-20 Nissan Motor Co., Ltd. Method and apparatus for controlling continuously variable transmission
JPS59131063A (ja) * 1982-09-16 1984-07-27 バン・ド−ルネズ・トランズミツシ−・ビ−・ブイ・ 自動車両用変速機
US4605112A (en) * 1982-10-09 1986-08-12 Fuji Jukogyo Kabushiki Kaisha Control system for an infinitely variable transmission with an electromagnetic powder clutch
JPS60104851A (ja) * 1983-11-10 1985-06-10 Mazda Motor Corp 無段変速機の制御装置
JPH0549858B2 (ja) * 1983-11-10 1993-07-27 Mazda Motor
US4782934A (en) * 1986-01-07 1988-11-08 Fuji Jukogyo Kabushiki Kaisha Control system for a continuously variable transmission
US4724724A (en) * 1986-01-08 1988-02-16 Fuji Jukogyo Kabushiki Kaisha System for controlling line pressure of a continuously variable transmission for a motor vehicle
EP0289024A3 (en) * 1987-04-30 1990-07-11 Honda Giken Kogyo Kabushiki Kaisha Belt-and-pulley type continuously variable transmission
EP0289024A2 (en) * 1987-04-30 1988-11-02 Honda Giken Kogyo Kabushiki Kaisha Belt-and-pulley type continuously variable transmission
US4913686A (en) * 1987-05-12 1990-04-03 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for controlling the transmission ratio of continuously variable transmission
JPS63280955A (ja) * 1987-05-12 1988-11-17 Honda Motor Co Ltd 無段変速機の変速比制御方法および変速比制御装置
JP2000179664A (ja) * 1998-12-16 2000-06-27 Luk Getriebe Syst Gmbh 自動車

Also Published As

Publication number Publication date
AR219839A1 (es) 1980-09-15
BR7907334A (pt) 1980-07-15
EP0011342B1 (en) 1984-03-14
ATE6690T1 (de) 1984-03-15
DE2966802D1 (en) 1984-04-19
AU532327B2 (en) 1983-09-29
AU5235679A (en) 1980-05-22
EP0011342A1 (en) 1980-05-28
US4369675A (en) 1983-01-25
NL7811192A (nl) 1980-05-16
JPH0419410B2 (ja) 1992-03-30

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