FR2154235A5 - - Google Patents

Info

Publication number
FR2154235A5
FR2154235A5 FR7233757A FR7233757A FR2154235A5 FR 2154235 A5 FR2154235 A5 FR 2154235A5 FR 7233757 A FR7233757 A FR 7233757A FR 7233757 A FR7233757 A FR 7233757A FR 2154235 A5 FR2154235 A5 FR 2154235A5
Authority
FR
France
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
FR7233757A
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.)
Fiat SpA
Original Assignee
Fiat SpA
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 Fiat SpA filed Critical Fiat SpA
Application granted granted Critical
Publication of FR2154235A5 publication Critical patent/FR2154235A5/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/11—Stepped gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/12—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with means for synchronisation not incorporated in the clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0605—Throttle position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/10—Change speed gearings
    • B60W2710/1005—Transmission ratio engaged
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/12—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with means for synchronisation not incorporated in the clutches
    • F16H2003/123—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with means for synchronisation not incorporated in the clutches using a brake
    • 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
    • F16H61/0403—Synchronisation before shifting
    • F16H2061/0411—Synchronisation before shifting by control of shaft brakes
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F16H2061/305—Accumulators for fluid supply to the servo motors, or control thereof
    • 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
    • F16H61/0403—Synchronisation before shifting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19284—Meshing assisters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19284—Meshing assisters
    • Y10T74/19288—Double clutch and interposed transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Gear-Shifting Mechanisms (AREA)
FR7233757A 1971-09-25 1972-09-22 Expired FR2154235A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT70163/71A IT939884B (it) 1971-09-25 1971-09-25 Cambio a sincronizzazione elettroni ca particolarmente per autoveicoli

Publications (1)

Publication Number Publication Date
FR2154235A5 true FR2154235A5 (fr) 1973-05-04

Family

ID=11313554

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7233757A Expired FR2154235A5 (fr) 1971-09-25 1972-09-22

Country Status (6)

Country Link
US (1) US3834499A (fr)
JP (1) JPS4840124A (fr)
DE (1) DE2246908A1 (fr)
FR (1) FR2154235A5 (fr)
GB (1) GB1368580A (fr)
IT (1) IT939884B (fr)

Cited By (16)

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EP0001298A1 (fr) * 1977-09-19 1979-04-04 Robert Bosch Gmbh Dispositif de changement de vitesse pour une transmission commandée sous charge
FR2458721A1 (fr) * 1979-06-08 1981-01-02 Peugeot Mecanisme de transmission comportant un embrayage et une boite de vitesses a plusieurs rapports
EP0088486A2 (fr) * 1982-02-05 1983-09-14 Automotive Products Public Limited Company Transmission d'un mouvement rotatif
EP0117342A2 (fr) * 1982-12-06 1984-09-05 Eaton Corporation Système de transmission mécanique automatisée
FR2556291A1 (fr) * 1983-12-09 1985-06-14 France Etat Armement Installation de commande a distance d'une boite de vitesses, du type mecanique
WO1986002604A1 (fr) * 1984-10-27 1986-05-09 Zahnradfabrik Friedrichshafen Ag Dispositif de commande pour embrayage a pression
EP0130812B1 (fr) * 1983-06-30 1987-11-04 Isuzu Motors Limited Dispositif de commande du changement de vitesse dans une transmission automatique
EP0134646B1 (fr) * 1983-06-30 1988-10-26 Fujitsu Limited Système de contrôle pour transmission automatique de véhicule
EP0300792A2 (fr) * 1987-07-22 1989-01-25 Isuzu Motors Limited Dispositif de commande pour le changement de vitesse automatique
EP0355070A1 (fr) * 1988-08-18 1990-02-21 Regie Nationale Des Usines Renault Procédé de commande de modulation du couple d'un moteur thermique associé à une boîte de vitesses automatique
EP0367020A1 (fr) * 1988-10-31 1990-05-09 Volkswagen Aktiengesellschaft Procédé de changement de rapport d'une boîte de vitesse
EP0552557A1 (fr) * 1992-01-22 1993-07-28 Eaton Corporation Système et méthode de commande améliorée pour le changement de vitesses d'une transmission intermédiaire fractionnant les vitesses
EP0403127B1 (fr) * 1989-06-12 1994-08-31 Hitachi, Ltd. Dispositif de commande du changement de vitesse automatique pour véhicules et méthode pour commander
EP0686789A1 (fr) * 1994-06-08 1995-12-13 Eaton Corporation Système et procédé pour la réduction de la durée de changement de vitesse dans un ensemble d'entraînement
US5842376A (en) * 1995-06-05 1998-12-01 Eaton Corporation System and method for decreasing ratio changing time by actuating inertia brake while the master clutch is engaged in electronically enhanced powertrain systems
WO2001065143A1 (fr) * 2000-02-29 2001-09-07 Kurrle, Frank Systeme de transmission a rapports multiples

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FR2265568B1 (fr) * 1974-03-26 1978-03-24 Berliet Automobiles
JPS5326884B2 (fr) * 1974-05-10 1978-08-04
US3915271A (en) * 1974-09-25 1975-10-28 Koppers Co Inc Method and apparatus for electronically controlling the engagement of coacting propulsion systems
DE2532008A1 (de) * 1975-07-17 1977-02-03 Berliet Automobiles Automatisch steuerbares fahrzeug-getriebe
JPS52127559A (en) * 1976-04-19 1977-10-26 Nissan Motor Co Ltd Electronic parallel shaft automatic transmission gear box
JPS5345830A (en) * 1976-10-01 1978-04-25 Kanzaki Kokyukoki Mfg Co Ltd Power transmission system for tractor or other
GB1582430A (en) * 1976-12-22 1981-01-07 Secr Defence Variable ratio transmission systems
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NL192800C (nl) * 1978-01-24 1998-02-03 Lahive John Anthony Elektronische stuurinrichting voor een automatisch overbrengingsmechanisme van een voertuig.
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JPS5835826B2 (ja) * 1980-10-30 1983-08-05 ダイハツ工業株式会社 Ｎｃ旋盤の主軸変速装置
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DE3108781A1 (de) * 1981-03-07 1982-09-16 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Hilfskraftbetaetigte getriebesteuerung
DE3137805A1 (de) * 1981-09-23 1983-03-31 Deere & Co., 61265 Moline, Ill. Getriebe zum querstehenden einbau und motorfahrzeug mit eingebautem getriebe
JPS58146748A (ja) * 1982-02-22 1983-09-01 Mazda Motor Corp 複合クラッチ式多段歯車変速機の変速制御方法
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GB8328625D0 (en) * 1983-10-26 1983-11-30 Secr Defence Power transmission
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DE3417504A1 (de) * 1984-05-11 1985-11-14 J.M. Voith Gmbh, 7920 Heidenheim Stufenschaltgetriebe, insbesondere fuer kraftfahrzeuge
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JPH0958303A (ja) * 1994-11-14 1997-03-04 Denso Corp 車両用変速伝動装置
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US7846064B2 (en) * 2004-01-20 2010-12-07 Eaton Corporation Control for an electromagnetic brake for a multiple-ratio power transmission that has a neutral switch for power take-off engagement
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ATE537387T1 (de) * 2007-07-23 2011-12-15 Schaeffler Technologies Gmbh Doppelkupplungsgetriebe mit einer vorrichtung zur ansteuerung einer mehrzahl hydraulischer schaltzylinder
DE102008000637A1 (de) * 2008-03-13 2009-09-17 Zf Friedrichshafen Ag Betätigungsanordnung eines zentralsynchronisierten Doppelkupplungsgetriebe
DE102008001566A1 (de) * 2008-05-06 2009-11-12 Zf Friedrichshafen Ag Verfahren zum Betreiben eines Fahrzeugantriebsstranges
DE102008042385A1 (de) 2008-09-26 2010-04-01 Zf Friedrichshafen Ag Handschaltgetriebe und Verfahren zur Schaltunterstützung eines Handschaltgetriebes
DE102009000254A1 (de) * 2009-01-15 2010-07-29 Zf Friedrichshafen Ag Verfahren zum Betreiben einer Getriebevorrichtung eines Fahrzeugantribsstranges
DE102009000721A1 (de) * 2009-02-09 2010-08-12 Zf Friedrichshafen Ag Ansteuerschaltung für eine Getriebebremse
US8475336B2 (en) * 2009-07-30 2013-07-02 GM Global Technology Operations LLC Hydraulic control system for a dual clutch transmission
US8225687B2 (en) * 2009-09-09 2012-07-24 GM Global Technology Operations LLC Hydraulic control systems for dual clutch transmissions
US8429994B2 (en) 2009-09-09 2013-04-30 GM Global Technology Operations LLC Hydraulic control systems for dual clutch transmissions
US8403792B2 (en) * 2009-10-21 2013-03-26 GM Global Technology Operations LLC Hydraulic control systems for dual clutch transmissions
US8192176B2 (en) * 2009-12-10 2012-06-05 GM Global Technology Operations LLC Hydraulic fluid supply system having active regulator
CN102667241B (zh) * 2009-12-11 2015-11-25 沃尔沃拉斯特瓦格纳公司 用于机动车辆的多离合变速器
US8443687B2 (en) * 2009-12-14 2013-05-21 GM Global Technology Operations LLC Electro-hydraulic control system for a dual clutch transmission
US8887498B2 (en) * 2009-12-18 2014-11-18 Gm Global Technology Operations, Llc Transmission hydraulic control system having an accumulator bypass valve assembly
US8402855B2 (en) * 2010-01-11 2013-03-26 GM Global Technology Operations LLC Hydraulic control systems for dual clutch transmissions
US8567580B2 (en) * 2010-01-22 2013-10-29 GM Global Technology Operations LLC Electro-hydraulic control system for a dual clutch transmission
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EP0001298A1 (fr) * 1977-09-19 1979-04-04 Robert Bosch Gmbh Dispositif de changement de vitesse pour une transmission commandée sous charge
FR2458721A1 (fr) * 1979-06-08 1981-01-02 Peugeot Mecanisme de transmission comportant un embrayage et une boite de vitesses a plusieurs rapports
EP0021877A1 (fr) * 1979-06-08 1981-01-07 Automobiles Peugeot Mécanisme de transmission comportant un embrayage et une boîte de vitesses à plusieurs rapports
EP0088486A2 (fr) * 1982-02-05 1983-09-14 Automotive Products Public Limited Company Transmission d'un mouvement rotatif
EP0088486A3 (fr) * 1982-02-05 1985-05-22 Automotive Products Public Limited Company Transmission d'un mouvement rotatif
EP0117342A2 (fr) * 1982-12-06 1984-09-05 Eaton Corporation Système de transmission mécanique automatisée
EP0117342A3 (en) * 1982-12-06 1985-05-15 Eaton Corporation Automatic mechanical transmission system
EP0130812B1 (fr) * 1983-06-30 1987-11-04 Isuzu Motors Limited Dispositif de commande du changement de vitesse dans une transmission automatique
EP0134646B1 (fr) * 1983-06-30 1988-10-26 Fujitsu Limited Système de contrôle pour transmission automatique de véhicule
FR2556291A1 (fr) * 1983-12-09 1985-06-14 France Etat Armement Installation de commande a distance d'une boite de vitesses, du type mecanique
WO1986002604A1 (fr) * 1984-10-27 1986-05-09 Zahnradfabrik Friedrichshafen Ag Dispositif de commande pour embrayage a pression
US4685548A (en) * 1984-10-27 1987-08-11 Zahnradfabrik Friedrichshafen, Ag Control system for speed synchronized clutch operation during gear shift of engine driven transmission
EP0300792A2 (fr) * 1987-07-22 1989-01-25 Isuzu Motors Limited Dispositif de commande pour le changement de vitesse automatique
EP0300792B1 (fr) * 1987-07-22 1993-10-06 Isuzu Motors Limited Dispositif de commande pour le changement de vitesse automatique
EP0355070A1 (fr) * 1988-08-18 1990-02-21 Regie Nationale Des Usines Renault Procédé de commande de modulation du couple d'un moteur thermique associé à une boîte de vitesses automatique
FR2635597A1 (fr) * 1988-08-18 1990-02-23 Renault Procede de commande de modulation du couple d'un moteur thermique associe a une boite de vitesses automatique
EP0367020A1 (fr) * 1988-10-31 1990-05-09 Volkswagen Aktiengesellschaft Procédé de changement de rapport d'une boîte de vitesse
EP0403127B1 (fr) * 1989-06-12 1994-08-31 Hitachi, Ltd. Dispositif de commande du changement de vitesse automatique pour véhicules et méthode pour commander
EP0552557A1 (fr) * 1992-01-22 1993-07-28 Eaton Corporation Système et méthode de commande améliorée pour le changement de vitesses d'une transmission intermédiaire fractionnant les vitesses
US5329826A (en) * 1992-01-22 1994-07-19 Eaton Corporation Enhanced automated splitter shifting with dual solenoid valves and auto fuel control
EP0686789A1 (fr) * 1994-06-08 1995-12-13 Eaton Corporation Système et procédé pour la réduction de la durée de changement de vitesse dans un ensemble d'entraînement
US5655407A (en) * 1994-06-08 1997-08-12 Eaton Corporation System and method for decreasing ratio changing time in electronically enhanced powertrain systems
USRE38615E1 (en) * 1994-06-08 2004-10-12 Eaton Corporation System and method for decreasing ratio changing time in electronically enhanced powertrain systems
US5842376A (en) * 1995-06-05 1998-12-01 Eaton Corporation System and method for decreasing ratio changing time by actuating inertia brake while the master clutch is engaged in electronically enhanced powertrain systems
WO2001065143A1 (fr) * 2000-02-29 2001-09-07 Kurrle, Frank Systeme de transmission a rapports multiples

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US3834499A (en) 1974-09-10
IT939884B (it) 1973-02-10
DE2246908A1 (de) 1973-04-05
GB1368580A (en) 1974-10-02
JPS4840124A (fr) 1973-06-13

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