WO2012135936A1 - Transmission dotée d'une cvt - Google Patents

Transmission dotée d'une cvt Download PDF

Info

Publication number
WO2012135936A1
WO2012135936A1 PCT/CA2012/000275 CA2012000275W WO2012135936A1 WO 2012135936 A1 WO2012135936 A1 WO 2012135936A1 CA 2012000275 W CA2012000275 W CA 2012000275W WO 2012135936 A1 WO2012135936 A1 WO 2012135936A1
Authority
WO
WIPO (PCT)
Prior art keywords
output
cvt
drivetrain
input
assembly
Prior art date
Application number
PCT/CA2012/000275
Other languages
English (en)
Inventor
Jean-François DIONNE
Jean-Robert Desmeules
François MESSIER
Original Assignee
Transmission Cvtcorp 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
Application filed by Transmission Cvtcorp Inc. filed Critical Transmission Cvtcorp Inc.
Publication of WO2012135936A1 publication Critical patent/WO2012135936A1/fr

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
    • 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
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2005—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with one sets of orbital gears

Definitions

  • the present disclosure generally relates to vehicle drivetrains.
  • the present disclosure is concerned with a drivetrain provided with a Continuously Variable Transmission (CVT).
  • CVT Continuously Variable Transmission
  • CVTs are well known in the art. Toroidal CVTs are also well known and are used when transmission ratios have to be finely adjusted.
  • the ratio range required on a vehicle is often such that it is impossible to completely cover it only using a full toroidal CVT which is generally limited to a maximal ratio range of about 6.
  • Figure 1 is a schematic bloc diagram of a drivetrain including a
  • FIG. 1 is a schematic bloc diagram of the drivetrain of Figure 1 shown in an IVT forward configuration
  • Figure 3 is a schematic bloc diagram of the drivetrain of Figure 1 shown at the maximal speed of the IVT forward configuration
  • Figure 4 is a schematic bloc diagram of the drivetrain of Figure 1 shown in a CVT forward configuration
  • Figure 5 is a schematic bloc diagram of the drivetrain of Figure 1 shown at the maximal speed of the CVT forward configuration.
  • Figure 6 is a schematic bloc diagram of the drivetrain of Figure 1 shown in an CVT reverse configuration.
  • An object is generally to provide an improved drivetrain including a CVT.
  • overdrive when used herein in the context of a CVT, is to be construed herein and in the appended claims as a condition where the CVT ratio is such that the CVT output speed is higher than the CVT input speed.
  • underdrive when used herein in the context of a CVT, is to be construed herein and in the appended claims as a condition where the CVT ratio is such that the CVT output speed is lower than the CVT input speed.
  • driver used herein and in the appended claims, is to be construed as the intervening mechanism by which power is transmitted from a prime mover to a final drive as well as this mechanism plus the prime mover.
  • a drivetrain including:
  • a CVT including an input associated to the output shaft of the prime mover and an output;
  • a power mixing assembly having a first input connected to the output shaft of the prime mover; a second input connected to the output of the CVT and an output;
  • a forward-reverse gear selection assembly having an input and an output defining the output of the drivetrain; the input of the forward-reverse gear selection assembly being connectable to either one of the output of the CVT and the output of the power mixing assembly.
  • the present disclosure is concerned with a drivetrain provided with a CVT that can be used in both CVT and Infinitely Variable Transmission (IVT) configurations and that includes forward and reverse gear configurations. Transitions between the CVT and IVT configurations are seamless to the operator.
  • CVT Infinitely Variable Transmission
  • the drivetrain 10 includes a prime mover 12, for example an engine, provided with an output shaft 14, a clutch 15, a gear set 16 interconnecting, via the clutch 15, the output shaft 14 to the input shaft 18 of a CVT 20, to a secondary shaft 22 and, optionally, to a power take off (PTO) 23.
  • a prime mover 12 for example an engine
  • PTO power take off
  • the dual- cavity toroidal CVT 20 is provided with two interconnected input flanges 24 and 26; an output flange 28 and six rollers 30 (only four shown) provided between the input flanges 24-26 and the output flange 28.
  • the input flanges 24 and 26 are connected to the input shaft 18 and the periphery of the output flange 28 includes teeth (not shown) that are meshed with a gear 44 mounted to a shaft 32.
  • a power mixing mechanism 34 is also part of the drivetrain 10.
  • the power mixing mechanism 34 includes a planetary gear train including a sun gear 36, a ring gear 38, a planet carrier 40 and planet gears 42.
  • the sun gear 36 is connected to the output flange 28 of the CVT
  • the planet carrier 40 is connected to the secondary shaft 22 via a gear 50.
  • the ring gear 38 is connected to a second fixed disk 52 of the clutch 46.
  • a movable disk 54 of the clutch 46 is provided between the fixed disks 48 and 52 and is connected to the input 58 of a Forward-Reverse gear selection assembly 56 and may be connected either to the first fixed disk 48, and thus to the sun gear 36, or to the second fixed disk 52 and thus to the ring gear 38.
  • the Forward-Reverse gear selection assembly 56 includes a forward gear set 60; a reverse gear set 62 and an output shaft 64 that may be associated with either one of the forward gear set 60 via a clutch 66 and the reverse gear set 62 via a clutch 68.
  • clutches 66 and 68 could be regrouped as one clutch similar to clutch 46.
  • FIG. 2 is a schematic bloc diagram of the drivetrain 10 shown in an IVT forward configuration. Accordingly, the movable disk 54 of the clutch 46 is connected with the fixed disk 52 and thus to the ring gear 38. Also, since the drivetrain 10 is in the IVT forward configuration, the clutch 66 is engaged to use the forward gear set 60. [0041]
  • the arrows in the appended figures are intended to illustrate the power flow path in the drivetrain 10 from the prime mover 12 to the final drive 70.
  • the ratios of the various gears of the drivetrain 10 may optionally be so selected that when the drivetrain 10 is in the IVT forward configuration shown in Figure 2, and when the rollers 30 of the CVT 20 are in the overdrive position also illustrated in Figure 2, the speed of the sun gear 36 and the speed of the planet carrier 40 are cancelling each other thus resulting in a zero speed of the ring gear 38. Accordingly, the speed of the output shaft 64 is also zero.
  • Figure 4 is a schematic bloc diagram of the drivetrain 10 shown in a CVT forward configuration.
  • the movable disk 54 is connected to the first fixed disk 48, thereby connecting the output flange 28 of the CVT 20 directly to the input of the Forward- Reverse gear selection assembly 56 without going through the power mixing mechanism 34.
  • the power mixing assembly 34 is not in function and that the entire torque supplied to the output shaft 64 goes through the CVT 20 as shown by the arrows of Figure 4.
  • Figure 5 is a schematic bloc diagram of the drivetrain 10 shown at the maximal speed of the CVT configuration.
  • Figure 6 of the appended drawings illustrates the drivetrain 10 in a CVT reverse configuration. Indeed, the clutch 68 of the Forward-Reverse gear selection assembly 56 is engaged therefore engaging the reverse gear set 62.
  • prime mover 12 has been described herein as an engine, other prime movers, such as for example turbines or electric motors, could be used.
  • the drivetrain is not limited in its application to the details of construction and parts illustrated in the accompanying drawings and described hereinabove.
  • the drivetrain is capable of other embodiments and of being practiced in various ways.
  • the phraseology or terminology used herein is for the purpose of description and not limitation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne une transmission dotée d'une transmission à variation continue (CVT) pouvant être utilisée dans des configurations de CVT et de transmission à variation infinie (IVT) et comprenant un ensemble de sélection de marche avant/arrière. Les transitions entre les configurations se font sans à-coups pour l'opérateur.
PCT/CA2012/000275 2011-04-07 2012-03-26 Transmission dotée d'une cvt WO2012135936A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161472910P 2011-04-07 2011-04-07
US61/472,910 2011-04-07

Publications (1)

Publication Number Publication Date
WO2012135936A1 true WO2012135936A1 (fr) 2012-10-11

Family

ID=46968493

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2012/000275 WO2012135936A1 (fr) 2011-04-07 2012-03-26 Transmission dotée d'une cvt

Country Status (1)

Country Link
WO (1) WO2012135936A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016074071A1 (fr) * 2014-11-10 2016-05-19 Transmission Cvtcorp Inc. Chaîne cinématique comportant une transmission à variation continue
EP3158230A4 (fr) * 2014-06-17 2018-03-07 Dana Limited Transmission hors route multi-mode basée sur un planétaire continument variable comportant une transmission infiniment variable et une transmission continument variable directe
WO2022000085A1 (fr) * 2020-07-02 2022-01-06 Transmission Cvtcorp Inc. Chaîne cinématique configurée pour une transition ivt synchrone à une transmission à variation continue

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092434A (en) * 1991-01-30 1992-03-03 Borg-Warner Automotive, Inc Control strategies for a dual range infinitely variable transmission
US5401221A (en) * 1990-08-17 1995-03-28 Torotrak (Development) Limited Transmission of the toroidal-race, rolling-traction type having a mixer and a reducer epicyclic type gearing with clutches brakes
US6210298B1 (en) * 1997-07-04 2001-04-03 Zf Friedrichshafen Ag Continuously variable transmission
US6436001B1 (en) * 1999-07-27 2002-08-20 Nissan Motor Co., Ltd. Speed change controller for infinite speed ratio transmission
US20040124021A1 (en) * 2002-11-29 2004-07-01 Hisanori Shirai Hybrid-vehicle power train
US20070021259A1 (en) * 2005-07-23 2007-01-25 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Power-branched transmission having a plurality of transmission ratio ranges with continuously variable transmission ratio

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401221A (en) * 1990-08-17 1995-03-28 Torotrak (Development) Limited Transmission of the toroidal-race, rolling-traction type having a mixer and a reducer epicyclic type gearing with clutches brakes
US5092434A (en) * 1991-01-30 1992-03-03 Borg-Warner Automotive, Inc Control strategies for a dual range infinitely variable transmission
US6210298B1 (en) * 1997-07-04 2001-04-03 Zf Friedrichshafen Ag Continuously variable transmission
US6436001B1 (en) * 1999-07-27 2002-08-20 Nissan Motor Co., Ltd. Speed change controller for infinite speed ratio transmission
US20040124021A1 (en) * 2002-11-29 2004-07-01 Hisanori Shirai Hybrid-vehicle power train
US20070021259A1 (en) * 2005-07-23 2007-01-25 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Power-branched transmission having a plurality of transmission ratio ranges with continuously variable transmission ratio

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3158230A4 (fr) * 2014-06-17 2018-03-07 Dana Limited Transmission hors route multi-mode basée sur un planétaire continument variable comportant une transmission infiniment variable et une transmission continument variable directe
US10006529B2 (en) 2014-06-17 2018-06-26 Dana Limited Off-highway continuously variable planetary-based multimode transmission including infinite variable transmission and direct continuously variable transmission
WO2016074071A1 (fr) * 2014-11-10 2016-05-19 Transmission Cvtcorp Inc. Chaîne cinématique comportant une transmission à variation continue
CN107250625A (zh) * 2014-11-10 2017-10-13 传输Cvt股份有限公司 设置有无级变速器的传动系
CN107250625B (zh) * 2014-11-10 2019-11-12 传输Cvt股份有限公司 设置有无级变速器的传动系
US10502268B2 (en) 2014-11-10 2019-12-10 Transmission Cvtcorp Inc. Drivetrain provided with a CVT
WO2022000085A1 (fr) * 2020-07-02 2022-01-06 Transmission Cvtcorp Inc. Chaîne cinématique configurée pour une transition ivt synchrone à une transmission à variation continue
US12055202B2 (en) 2020-07-02 2024-08-06 Transmission Cvtcorp Inc. Drivetrain configured for synchronous IVT to CVT transition

Similar Documents

Publication Publication Date Title
US10088026B2 (en) Ball type CVT with output coupled powerpaths
EP2971864B1 (fr) Architecture de transmission à variation infinie et division de puissance
US20140155220A1 (en) Drivetrain Provided with a CVT
US8888646B2 (en) Two-mode continuously variable transmission
US8376889B2 (en) Transmission producing continuously variable speed ratios
US20170152928A1 (en) 4-mode powersplit transmission based on continuously variable planetary technology
US20110165986A1 (en) Transmission Producing Continuously Speed Ratios
KR20140016813A (ko) 트랜스미션
GB2407853A (en) CVT which provides low speed shuttling for agricultural vehicle
US20110165988A1 (en) Transmission Producing Stepless Variable Speed Ratios
US8961352B2 (en) Drive train provided with a CVT
CN200982392Y (zh) 双变矩器行星齿轮变速机构
WO2012135936A1 (fr) Transmission dotée d'une cvt
US20140045637A1 (en) Drivetrain provided with a cvt
US8961351B2 (en) Continuously variable transmission
US9512911B2 (en) Split power continuously variable transmission architecture incorporating a planetary type ball variator with multiple fixed ranges
US10502268B2 (en) Drivetrain provided with a CVT
US12055202B2 (en) Drivetrain configured for synchronous IVT to CVT transition
EP3174751B1 (fr) Chaîne cinématique pour véhicules tout-terrain équipée d'une transmission à variation continu à double fonction
WO2016061496A1 (fr) Architecture de transmission à variation continue à puissance divisée incorporant un variateur à bille de type planétaire à faible charge du variateur au lancement du véhicule
US20150051042A1 (en) Infinitely Variable Speed Amplifier

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12767606

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12767606

Country of ref document: EP

Kind code of ref document: A1