WO2001021980A1 - Automatic gear-box comprising five forward running ratios - Google Patents

Automatic gear-box comprising five forward running ratios Download PDF

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Publication number
WO2001021980A1
WO2001021980A1 PCT/FR2000/002581 FR0002581W WO0121980A1 WO 2001021980 A1 WO2001021980 A1 WO 2001021980A1 FR 0002581 W FR0002581 W FR 0002581W WO 0121980 A1 WO0121980 A1 WO 0121980A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission
controlled
shaft
upstream
downstream
Prior art date
Application number
PCT/FR2000/002581
Other languages
French (fr)
Inventor
Alain Estibals
Original Assignee
Renault
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 Renault filed Critical Renault
Priority to EP00964310A priority Critical patent/EP1214532A1/en
Publication of WO2001021980A1 publication Critical patent/WO2001021980A1/en

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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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/62—Gearings having three or more central gears
    • F16H3/66—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another
    • 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
    • F16H2200/0008—Transmissions for multiple ratios specially adapted for front-wheel-driven vehicles
    • 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
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0047—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising five forward speeds
    • 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
    • F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears

Definitions

  • the invention relates to an automatic transmission for a motor vehicle
  • the invention relates more particularly to an automatic transmission for a motor vehicle, of the type which comprises from upstream to downstream, a hydraulic torque converter, at least two coaxial upstream and downstream epicyclic trains, and at least one bridge which is intended to drive the wheels of the vehicle, of the type in which at least one element of the planetary trains is connected in rotation to the bridge, at least one element of the planetary trains is rotated to another element of the planetary trains, at least one element of the planetary gear trains is capable of being selectively linked in rotation to a shaft of a turbine of the converter, and at least one element is capable of being selectively linked to a casing of the transmission, in order to establish different ratios of transmission
  • a crown of the upstream epicycloidal tram is linked in rotation to a planet carrier of the downstream epicyclic tram which is linked in rotation to the bridge
  • a crown of the downstream epicyclic train is linked in rotation to the planet carrier of the upstream epicyclic tram
  • a planetary of the upstream epicyclic tram is capable of being rotated at the turbine shaft by means of a first controlled clutch or else is capable of being hoisted to the casing of the transmission via a first controlled brake
  • a planet carrier of the upstream epicyclic tram is capable of being rotated to the turbine shaft of the converter via a second controlled clutch or is capable of to be linked to the transmission housing via a second controlled brake
  • a planetary of the downstream epicyclic tram is likely to be connected to the transmission casing by means of a third controlled brake
  • Such transmission allows in particular, by selectively actuating the first and second clutches and the first, second, and third brakes, to establish at most four different transmission ratios in forward gear and a transmission ratio in reverse gear
  • This arrangement has the disadvantage of limiting the range of reports offered by the transmission to four reports.
  • the invention proposes an automatic transmission comprising a fifth u th direct transmission transmission ratio.
  • the invention provides an automatic transmission of the type described above, characterized in that the bridge is capable of being selectively rotated directly to the turbine shaft of the converter in order to obtain an additional transmission ratio
  • a planetary of the upstream epicyclic idal tram is capable of being rotated to the turbine shaft by means of a first controlled clutch or is capable of being hoisted at the transmission casing by means of a first controlled brake
  • a planet carrier of the upstream epicyclo ida tram is capable of being rotated to the turbine shaft of the converter by means of a second controlled clutch or is likely to be linked to the transmission casing via a second controlled brake
  • a planetarium of the downstream epicycloidal tram is likely to be hoisted to the transmission case via a third controlled brake
  • a crown of the upstream epicycloidal train is linked in rotation to a planet carrier of the downstream epicycloidal tram which is rotated at the bridge, and a crown of the downstream epicycloidal tram is linked in rotation to the planet carrier of the upstream epicycloidal tram,
  • the automatic transmission comprises a bridge lowering shaft, one of which is an upstream gear meshing with a pinion secured to the planet carrier of the downstream epicycioidal tram and one of which is a downstream gear meshing with a drive pinion for the bridge,
  • the bridge lowering shaft comprises an additional pinion which permanently meshes with a idler pinion which is capable of being selectively clutched to the turbine shaft of the converter by means of an additional controlled clutch,
  • the turbine shaft of the converter has an additional pinion which permanently meshes with a fixed pinion of an intermediate descent shaft which is capable of being selectively coupled to the bridge descent shaft via a additional clutch controlled,
  • the clutches and brakes are hydraulically operated, and the additional clutch is supplied with hydraulic fluid by a specific distributor, - the turbine shaft coaxially crosses the two epicyclic trains,
  • the first and second controlled clutches are arranged opposite the converter turbine with respect to the two planetary gear trains and comprise at least one common element
  • the additional controlled clutch is arranged opposite the converter turbine with respect to the two planetary gear trains
  • the first and third controlled brakes are arranged on either side of the two planetary gear trains and of the second controlled brake, the first controlled brake being arranged near the planetary of the upstream epicyclic id tram and the third controlled brake being arranged near of the planetary of the downstream epicyclic tram
  • FIG. 1 is a schematic view of a first embodiment of a transmission according to the invention
  • - Figure 2 is a schematic view of a second embodiment of a transmission according to the invention
  • - Figure 3 is a table representative of the active / mactive state of the clutches and brakes of the transmission in function different transmission relationships that it allows to establish
  • the transmission 1 0 comprises from upstream to downstream, a hydraulic torque converter q which is capable of supplying the transmission 1 0 with a driving power coming from an engine (not shown) of the vehicle and which comprises at at least one turbine wheel 12, at least two coaxial upstream 14 and downstream epicyclic trains 14 and at least one bridge 1 8 which is intended to drive the vehicle wheels 20
  • the hydraulic torque converter, the two upstream planetary gear trains 14 and upstream 16, and the axle 1 8 are rotatably mounted in a casing 19 of the transmission 1 0
  • the turbine wheel 12 is linked in rotation to one end of a turbine shaft 22 which coaxially crosses the two epicyclic upstream 14 and downstream 16 trains, and the other end of which is linked in rotation to an element 24 common to two clutches 26 and 28 controls which are capable of selectively linking elements of the two epicyclic upstream 14 and downstream 16 trains to allow their coupling with the turbine shaft 22
  • the clutches 26 and 28 controlled are hydraulically controlled disc clutches which are controlled by hydraulic clutch distributors (not shown) controlled in opening by a central control unit (not shown) of the transmission but this arrangement is not limiting of the invention and it could be electromagnetic powder clutches or electromechanical clutches which would then be controlled by relays controlled by said central control unit
  • the transmission 10 includes three brakes 30, 32, and 34 controlled which make it possible to selectively join elements of the two epicyclic upstream 14 and downstream 16 trains 16 with the casing 19 of the transmission 10
  • the controlled brake 30 is a hydraulically controlled disc brake and the brakes 32 and 34 controlled are hydraulically controlled band brakes which are controlled by hydraulic brake distributors (not shown ) controlled in opening by the central transmission control unit, but this arrangement is not limitative of the invention, and it could be electromagnetic powder brakes, or electromechanical brakes which would then be controlled by relays controlled by said central control unit
  • at least one element of the planetary trains 14 and 16 is rotated to the bridge 18, at least one element of the planetary trains 14 and 16 is rotated to another element of the planetary trains 14 and 16 at least an element of the planetary gear trains 14 and 16 is capable of being selectively rotated at the shaft 22 of a turbine of the converter, and at least one element of the planetary gear trains 14 and 16 is capable of being selectively connected to the casing 19 transmission 10, to establish different transmission ratios
  • a sun gear 36 of the upstream epicyclic tram 14 is capable of being rotated to the shaft 22 of the turbine by the intermediate of the first clutch 26 controlled or is capable of being connected to the casing 19 of the transmission 10 by means of the first brake 30 controlled
  • a planet carrier 38 of the upstream planetary gear 14 is capable of being linked in rotation to the converter turbine shaft 22 via the second controlled clutch 28, or is capable of being linked to the casing 19 of the transmission 10 via the second controlled brake 32
  • a planetary gear 42 of the epicyclic tram downstream 16 is likely to be linked to the casing 19 of the transmission via the third brake 34 controlled
  • the first controlled clutch 26 and the second controlled clutch 28 are arranged opposite the turbine 12 of the converter with respect to the two planetary gears 14 and 16.
  • the first controlled brake 30 and the third controlled brake 34 are arranged on either side of the two planetary trains 14 and 16 and of the second control brake 32 which is arranged substantially around the two planetary trains 14 and 16, the first control brake being arranged close to the sun gear 36 of the upstream epicycloidal tram 14 and the third controlled brake 36 being arranged close to the sun gear 42 of the downstream epicycloidal tram
  • This arrangement advantageously makes it possible to have a particularly axially compact transmission 10
  • the motive power which selectively travels through the elements of the upstream 14 and downstream epicyclic trams is transmitted to the bridge 18, and therefore to the wheels 20, via a pinion 48 which is carried by the planet carrier 44 of the downstream epicyclic idal tram 16 and which meshes with a shaft 50 of the descent of the meshing bridge
  • the shaft 50 for lowering the bridge which is rotatably mounted in the casing 19 of the transmission, has at one end an upstream pinion 52 which meshes with the pinion 48 secured to the planet carrier 44 of the epicyclic tram .
  • downstream dal 16 and comprises at its opposite end a downstream pinion 54 which meshes with a pinion 56 for driving the bridge 18
  • the transmission 10 makes it possible to establish a reverse gear transmission ratio "AR" by activating only the first clutch 26 and the second brake 32 a first forward gear transmission ratio “R1” by activating only the first clutch 26 and the third brake 34, a second ratio “R2” of forward transmission by activating only the second clutch 28 and the third brake 34, a third ratio “R3” of forward transmission by activating only the first clutch 26 and the second clutch 28, and a fourth "R4" gear ratio front by activating only the second clutch 26 and the first brake 30
  • the bridge 18 is capable of being selectively rotated in a direct manner to the turbine shaft 22 of the converter in order to obtain an additional transmission ratio corresponding to a fifth "direct drive" transmission ratio of the transmission.
  • the transmission 10 comprises means intended to directly drive the shaft 50 for lowering the bridge using the element 24 of the shaft 22 of the turbine which is common to the two clutches 26 and 28
  • the element 24 of the converter turbine shaft 22 comprises an additional pinion 58 which permanently meshes with a fixed pinion 60 of an intermediate shaft 62 of descent which is capable of being selectively coupled to the shaft 50 for lowering the axle by means of an additional clutch 64 controlled
  • the shaft 50 for lowering the bridge comprises an additional pinion 58 which permanently meshes with a idler pinion 60 which is capable of being selectively clutched on the turbine shaft 22 of the converter by means of an additional clutch 64 controlled
  • the additional clutch 64 controlled is in particular carried by the element 24 of the shaft 22 of the turbine and is therefore arranged opposite the turbine 12 of the converter with respect to the two planetary gear trains 14, 16
  • the additional clutch 64 controlled is a hydraulically controlled disc clutch which is controlled by a specific hydraulic distributor In this way, the hydraulic supply of the transmission 10 remains unchanged compared to the prior art corresponding to a transmission with four forward gears.
  • the transmission 10 makes it possible to establish the fifth forward transmission ratio "R5" by activating only the additional clutch 64 Either of the second clutch 28 or the first brake 30 may possibly remain activated
  • the driving power travels directly from the turbine shaft 22 to the bridge 50 without traveling by the planetary gears 14 and 16
  • the transmission 10 according to the invention therefore makes it possible to benefit from an automatic transmission comprising a fifth ratio "R5" of direct intake which is particularly advantageous, in terms of fuel consumption, at high speed, as is the case during a motorway route

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention concerns an automatic gear-box (10) for a motor vehicle, comprising from upstream to downstream, a hydraulic torque converter, two coaxial upstream (14) and downstream (16) planetary gear trains, and at least a bridge (18) designed to drive the vehicle wheels (20), wherein at least an element of the planetary gear trains is linked in rotation to the bridge (18), at least en element of the planetary gear trains (14, 16) is linked in rotation to another element of the planetary gear trains (14, 16), a least an element of the planetary gear trains (14, 16) is capable of being selectively linked in rotation to a shaft (22) of a turbine (12) of the converter, and at least an element is capable of being selectively linked to a housing (19) of the gear-box (10), to set different gear ratios (AR, R1, R2, R3, R4). The invention is characterised in that the bridge (18) is capable of being directly linked in rotation to the shaft (22) of the converter turbine to provide a supplementary gear ratio (R5).

Description

"Transmission automatique comportant cinq rapports de marche avant" "Automatic transmission with five forward gears"
L'invention concerne une transmission automatique pour véhicule automobile L'invention concerne plus particulièrement une transmission automatique pour véhicule automobile, du type qui comporte d'amont en aval, un convertisseur hydraulique de couple, au moins deux trains épicycloïdaux amont et aval coaxiaux, et au moins un pont qui destiné à entraîner des roues du véhicule, du type dans lequel au moins un élément des trains épicycloïdaux est lié en rotation au pont, au moins un élément des trains épicycloïdaux est é en rotation à un autre élément des trains épicycloïdaux, au moins un élément des trains épicycloïdaux est susceptible d'être lié sélectivement en rotation à un arbre d'une turbine du convertisseur, et au moins un élément est susceptible d'être lié sélectivement à un carter de la transmission, pour établir différents rapports de transmissionThe invention relates to an automatic transmission for a motor vehicle The invention relates more particularly to an automatic transmission for a motor vehicle, of the type which comprises from upstream to downstream, a hydraulic torque converter, at least two coaxial upstream and downstream epicyclic trains, and at least one bridge which is intended to drive the wheels of the vehicle, of the type in which at least one element of the planetary trains is connected in rotation to the bridge, at least one element of the planetary trains is rotated to another element of the planetary trains, at least one element of the planetary gear trains is capable of being selectively linked in rotation to a shaft of a turbine of the converter, and at least one element is capable of being selectively linked to a casing of the transmission, in order to establish different ratios of transmission
On connaît de nombreux exemples de transmissions automatiques de ce typeNumerous examples of automatic transmissions of this type are known.
Il peut s'agir par exemple de transmissions automatiques dans lesquelles une couronne du tram épicycloidal amont est liée en rotation à un porte-satellites du tram épicycloidal aval qui est lié en rotation au pont, une couronne du train épicycloidal aval est liée en rotation au porte-satellites du tram épicyclofdal amont, un planétaire du tram épicycloidal amont est susceptible d'être é en rotation à l'arbre de turbine par l'intermédiaire d'un premier embrayage commandé ou bien est susceptible d'être hé au carter de la transmission par l'intermédiaire d'un premier frein commandé, un porte-satellites du tram épicycloidal amont est susceptible d'être hé en rotation à l'arbre de turbine du convertisseur par l'intermédiaire d'un second embrayage commandé ou bien est susceptible d'être lie au carter de la transmission par l'intermédiaire d'un second frein commandé , et un p lanétaire d u tram épicycloidal aval est susceptible d'être é au carter de la transm ission par l'interméd ia ire d 'un troisième frein commandéThese may for example be automatic transmissions in which a crown of the upstream epicycloidal tram is linked in rotation to a planet carrier of the downstream epicyclic tram which is linked in rotation to the bridge, a crown of the downstream epicyclic train is linked in rotation to the planet carrier of the upstream epicyclic tram, a planetary of the upstream epicyclic tram is capable of being rotated at the turbine shaft by means of a first controlled clutch or else is capable of being hoisted to the casing of the transmission via a first controlled brake, a planet carrier of the upstream epicyclic tram is capable of being rotated to the turbine shaft of the converter via a second controlled clutch or is capable of to be linked to the transmission housing via a second controlled brake, and a planetary of the downstream epicyclic tram is likely to be connected to the transmission casing by means of a third controlled brake
U ne telle transmission permet notamment, en actionnant sélectivement les premier et deuxième embrayages et les prem ier, deuxième, et troisième freins, d'établir au plus q uatre rapports d ifférents de transmission en marche avant et u n rapport de transmission en ma rche arrièreSuch transmission allows in particular, by selectively actuating the first and second clutches and the first, second, and third brakes, to establish at most four different transmission ratios in forward gear and a transmission ratio in reverse gear
Cette d isposition présente l'inconvénient de limiter la gamme des rapports proposes par la transmission à q uatre rapportsThis arrangement has the disadvantage of limiting the range of reports offered by the transmission to four reports.
En particu lier cette d isposition ne peut proposer de démultip lication dite "de prise directe", puisq ue le rapport de rang le plus élevé est fonction du rapport entre le nombre de dents des éléments des trains épicycloï daux m is en oeuvreIn particular, this arrangement cannot offer so-called "direct drive" demultip lication, since the highest row ratio is a function of the ratio between the number of teeth of the planetary gear elements used
Pou r remédier à cet inco nvén ient, l'invention propose une transmission automatique comportant un cinq u ième rapport de transmission de prise d irecteTo remedy this drawback, the invention proposes an automatic transmission comprising a fifth u th direct transmission transmission ratio.
Dans ce but l'invention propose une transmission automatiq ue du type décrit précédemment, caractérisée en ce que le pont est susceptible d'être hé sélectivement en rotation d irectement à l'arbre de turbine du convertisseu r pour obtenir un rapport supplémentaire de transmissionFor this purpose the invention provides an automatic transmission of the type described above, characterized in that the bridge is capable of being selectively rotated directly to the turbine shaft of the converter in order to obtain an additional transmission ratio
Selon d'autres caractéristiq ues de l'invention - un planétaire du tram épicyclo idal amont est susceptible d'être hé en rotation à l'arbre de turbine par l'intermédiaire d'un premier embrayage commandé ou bien est susceptible d'être hé au carter de la transmission par l'intermédiaire d'un premier frein commandé, un porte-satellites du tram épicyclo ida l amont est susceptible d'être hé en rotation à l'arbre de turbine d u convertisseur par l'interméd iaire d'un second embrayage commandé ou bien est susceptible d'être lié au carter de la transmission par l'interméd iaire d'un deuxième frein commandé, et un planétai re d u tram epicycloidal aval est susceptible d'être hé au carter de la transmission par l'intermédiaire d'un troisième frein commandéAccording to other features of the invention - a planetary of the upstream epicyclic idal tram is capable of being rotated to the turbine shaft by means of a first controlled clutch or is capable of being hoisted at the transmission casing by means of a first controlled brake, a planet carrier of the upstream epicyclo ida tram is capable of being rotated to the turbine shaft of the converter by means of a second controlled clutch or is likely to be linked to the transmission casing via a second controlled brake, and a planetarium of the downstream epicycloidal tram is likely to be hoisted to the transmission case via a third controlled brake
- une couronne du train epicycloidal amont est liée en rotation à un porte-satellites du tram epicycloidal aval qui est hé en rotation au pont, et une couronne du tram épicycloidal aval est liée en rotation au porte-satellites du tram épicycloidal amont,- a crown of the upstream epicycloidal train is linked in rotation to a planet carrier of the downstream epicycloidal tram which is rotated at the bridge, and a crown of the downstream epicycloidal tram is linked in rotation to the planet carrier of the upstream epicycloidal tram,
- la transmission automatique comporte un arbre de descente de pont dont un pignon amont engrène avec un pignon solidaire du porte-satellites du tram epicycioidal aval et dont un pignon aval engrène avec un pignon d'attaque du pont,- the automatic transmission comprises a bridge lowering shaft, one of which is an upstream gear meshing with a pinion secured to the planet carrier of the downstream epicycioidal tram and one of which is a downstream gear meshing with a drive pinion for the bridge,
- l'arbre de descente de pont comporte un pignon supplémentaire qui engrène en permanence avec un pignon fou qui est susceptible d'être craboté sélectivement sur l'arbre de turbine du convertisseur par l'intermédiaire d'un embrayage supplémentaire commandé,the bridge lowering shaft comprises an additional pinion which permanently meshes with a idler pinion which is capable of being selectively clutched to the turbine shaft of the converter by means of an additional controlled clutch,
- l'arbre de turbine du convertisseur comporte un pignon supplémentaire qui engrène en permanence avec un pignon fixe d'un arbre intermédiaire de descente qui est susceptible d'être accouplé sélectivement à l'arbre de descente de pont par l'intermédiaire d'un embrayage supplémentaire commandé,the turbine shaft of the converter has an additional pinion which permanently meshes with a fixed pinion of an intermediate descent shaft which is capable of being selectively coupled to the bridge descent shaft via a additional clutch controlled,
- les embrayages et les freins sont à commande hydraulique, et l'embrayage supplémentaire est alimenté en fluide hydraulique par un distributeur spécifique, - l'arbre de turbine traverse coaxialement les deux trains épicycloïdaux,- the clutches and brakes are hydraulically operated, and the additional clutch is supplied with hydraulic fluid by a specific distributor, - the turbine shaft coaxially crosses the two epicyclic trains,
- les premier et second embrayages commandés sont agencés à l'opposé de la turbine du convertisseur par rapport aux deux trains épicycloïdaux et comportent au moins un élément commun,the first and second controlled clutches are arranged opposite the converter turbine with respect to the two planetary gear trains and comprise at least one common element,
- l'embrayage supplémentaire commandé est agencé à l'opposé de la turbine du convertisseur par rapport aux deux trains épicycloïdaux, - les premier et troisième freins commandés sont agencés de part et d'autre des deux trains épicycloïdaux et du deuxième frein commandé, le premier frein commandé étant agencé a p roximité d u planétaire d u tram épicyclo idal amont et le troisième frein commandé étant agencé à p roximité du planétaire d u tram épicycloidal aval- the additional controlled clutch is arranged opposite the converter turbine with respect to the two planetary gear trains, - the first and third controlled brakes are arranged on either side of the two planetary gear trains and of the second controlled brake, the first controlled brake being arranged near the planetary of the upstream epicyclic id tram and the third controlled brake being arranged near of the planetary of the downstream epicyclic tram
D'autres caractéristiq ues et avantages de l'invention apparaîtront à la lecture de la description détail lée q ui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesq uelsOther characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which
- la figure 1 est une vue schématiq ue d'un premier mode de réalisation d'une transmission selon l'invention ,FIG. 1 is a schematic view of a first embodiment of a transmission according to the invention,
- la figure 2 est une vue schématique d 'un deuxième mode de réalisation d'une transmission selon l'i nvention , - la figure 3 est un tableau représentatif du l'état actif/mactif des embrayages et des freins de la transmission en fonction des différents rapports de transmission qu'elle permet d'établir- Figure 2 is a schematic view of a second embodiment of a transmission according to the invention, - Figure 3 is a table representative of the active / mactive state of the clutches and brakes of the transmission in function different transmission relationships that it allows to establish
Dans la description qui va suivre, des chiffres de référence identiq ues désignent des pièces identiq ues ou ayant des fonctions similairesIn the following description, identical reference numerals designate parts that are identical or have similar functions
On a représenté schématiquement aux fig ures 1 et 2 une transmission 1 0 réalisée conformément à l'inventionThere is shown schematically in Fig ures 1 and 2 a transmission 1 0 produced according to the invention
De manière connue , la transmission 1 0 comporte d'amont en aval, un convertisseur hydraulique de couple q ui est susceptible de fournir à la transmission 1 0 une pu issance motrice issue d'un moteur (non représenté) d u véhicule et qui comporte au moins un roue 12 de turbine, au moins deux trains épicyclo ïdaux amont 14 et aval 16 coaxiaux, et au moins un pont 1 8 q ui destiné à entraîner des roues 20 d u véhiculeIn known manner, the transmission 1 0 comprises from upstream to downstream, a hydraulic torque converter q which is capable of supplying the transmission 1 0 with a driving power coming from an engine (not shown) of the vehicle and which comprises at at least one turbine wheel 12, at least two coaxial upstream 14 and downstream epicyclic trains 14 and at least one bridge 1 8 which is intended to drive the vehicle wheels 20
Le convertisseur hydrau lique de couple , les deux trains épicyclo ïdaux amont 14 et ava l 16, et le pont 1 8 sont montés à rotation dans un carter 19 de la transmission 1 0 La roue 12 de turbine est liée en rotation à une extrémité d'un arbre 22 de turbine qui traverse coaxialement les deux trains épicycloïdaux amont 14 et aval 16, et dont l'autre extrémité est liée en rotation a un élément 24 commun à deux embrayages 26 et 28 commandes qui sont susceptibles de lier sélectivement des éléments des deux trains épicycloïdaux amont 14 et aval 16 pour permettre leur accouplement avec l'arbre 22 de turbineThe hydraulic torque converter, the two upstream planetary gear trains 14 and upstream 16, and the axle 1 8 are rotatably mounted in a casing 19 of the transmission 1 0 The turbine wheel 12 is linked in rotation to one end of a turbine shaft 22 which coaxially crosses the two epicyclic upstream 14 and downstream 16 trains, and the other end of which is linked in rotation to an element 24 common to two clutches 26 and 28 controls which are capable of selectively linking elements of the two epicyclic upstream 14 and downstream 16 trains to allow their coupling with the turbine shaft 22
Dans le mode de réalisation préféré de l'invention, les embrayages 26 et 28 commandés sont des embrayages à disques à commande hydraulique qui sont commandés par des distributeurs hydrauliques d'embrayage (non représentés) pilotés en ouverture par une unité centrale de contrôle (non représentée) de la transmission mais cette disposition n'est pas limitative de l'invention et il pourrait s'agir d'embrayages électromagnétiques à poudre ou encore d'embrayages électromécaniques qui seraient alors commandés par des relais pilotés par ladite unité centrale de contrôleIn the preferred embodiment of the invention, the clutches 26 and 28 controlled are hydraulically controlled disc clutches which are controlled by hydraulic clutch distributors (not shown) controlled in opening by a central control unit (not shown) of the transmission but this arrangement is not limiting of the invention and it could be electromagnetic powder clutches or electromechanical clutches which would then be controlled by relays controlled by said central control unit
Par ailleurs, la transmission 10 comporte trois freins 30, 32, et 34 commandés qui permettent de solidariser sélectivement des éléments des deux trains épicycloïdaux amont 14 et aval 16 avec le carter 19 de la transmission 10Furthermore, the transmission 10 includes three brakes 30, 32, and 34 controlled which make it possible to selectively join elements of the two epicyclic upstream 14 and downstream 16 trains 16 with the casing 19 of the transmission 10
Dans le mode de réalisation préféré de l'invention, le frein 30 commandé est un frein à disque à commande hydraulique et les freins 32 et 34 commandés sont des freins à bande à commande hydraulique qui sont commandés par des distributeurs hydrauliques de freinage (non représentes) pilotés en ouverture par l'unité centrale de contrôle de la transmission, mais cette disposition n'est pas limitative de l'invention, et il pourrait s'agir de freins électromagnétiques à poudre, ou encore de freins électromécaniques qui seraient alors commandés par des relais pilotés par ladite unité centrale de contrôle D'une façon générale, au moins un élément des trains épicycloïdaux 14 et 16 est hé en rotation au pont 18, au moins un élément des trains épicycloïdaux 14 et 16 est é en rotation a un autre élément des trains épicycloïdaux 14 et 16 au moins un élément des trains épicycloïdaux 14 et 16 est susceptible d'être hé sélectivement en rotation à l'arbre 22 d'une turbine du convertisseur, et au moins un élément des trains épicycloïdaux 14 et 16 est susceptible d'être hé sélectivement au carter 19 de la transmission 10, pour établir différents rapports de transmissionIn the preferred embodiment of the invention, the controlled brake 30 is a hydraulically controlled disc brake and the brakes 32 and 34 controlled are hydraulically controlled band brakes which are controlled by hydraulic brake distributors (not shown ) controlled in opening by the central transmission control unit, but this arrangement is not limitative of the invention, and it could be electromagnetic powder brakes, or electromechanical brakes which would then be controlled by relays controlled by said central control unit In general, at least one element of the planetary trains 14 and 16 is rotated to the bridge 18, at least one element of the planetary trains 14 and 16 is rotated to another element of the planetary trains 14 and 16 at least an element of the planetary gear trains 14 and 16 is capable of being selectively rotated at the shaft 22 of a turbine of the converter, and at least one element of the planetary gear trains 14 and 16 is capable of being selectively connected to the casing 19 transmission 10, to establish different transmission ratios
En particulier, dans la disposition particulière, mais non limitative de l'invention, qui est représentée aux figures 1 et 2 un planétaire 36 du tram épicycloidal amont 14 est susceptible d'être hé en rotation à l'arbre 22 de turbine par l'intermédiaire du premier embrayage 26 commandé ou bien est susceptible d'être é au carter 19 de la transmission 10 par l'intermédiaire du premier frein 30 commandé, un porte-satellites 38 du train épicycloidal amont 14 est susceptible d'être lié en rotation à l'arbre 22 de turbine du convertisseur par l'intermédiaire du second embrayage 28 commandé, ou bien est susceptible d'être lié au carter 19 de la transmission 10 par l'intermédiaire du deuxième frein commandé 32, et un planétaire 42 du tram épicycloïdal aval 16 est susceptible d'être lié au carter 19 de la transmission par l'intermédiaire du troisième frein 34 commandéIn particular, in the particular, but not limiting, arrangement of the invention, which is shown in FIGS. 1 and 2, a sun gear 36 of the upstream epicyclic tram 14 is capable of being rotated to the shaft 22 of the turbine by the intermediate of the first clutch 26 controlled or is capable of being connected to the casing 19 of the transmission 10 by means of the first brake 30 controlled, a planet carrier 38 of the upstream planetary gear 14 is capable of being linked in rotation to the converter turbine shaft 22 via the second controlled clutch 28, or is capable of being linked to the casing 19 of the transmission 10 via the second controlled brake 32, and a planetary gear 42 of the epicyclic tram downstream 16 is likely to be linked to the casing 19 of the transmission via the third brake 34 controlled
Avantageusement, le premier embrayage commandé 26 et le second embrayage commandé 28 sont agencés à l'opposé de la turbine 12 du convertisseur par rapport aux deux trains épicycloïdaux 14 et 16 D'une façon analogue, le premier frein commandé 30 et le troisième frein commandé 34 sont agencés de part et d'autre des deux trains épicycloïdaux 14 et 16 et du deuxième frein commande 32 qui est agencé sensiblement autour des deux trains épicycloïdaux 14 et 16, le premier frein commande étant agencé à proximité du planétaire 36 du tram epicycloidal amont 14 et le troisième frein commandé 36 étant agencé à proximité du planétaire 42 du tram épicycloidal avalAdvantageously, the first controlled clutch 26 and the second controlled clutch 28 are arranged opposite the turbine 12 of the converter with respect to the two planetary gears 14 and 16. Similarly, the first controlled brake 30 and the third controlled brake 34 are arranged on either side of the two planetary trains 14 and 16 and of the second control brake 32 which is arranged substantially around the two planetary trains 14 and 16, the first control brake being arranged close to the sun gear 36 of the upstream epicycloidal tram 14 and the third controlled brake 36 being arranged close to the sun gear 42 of the downstream epicycloidal tram
Cette disposition permet avantageusement de disposer d'une transmission 10 particulièrement compacte axialementThis arrangement advantageously makes it possible to have a particularly axially compact transmission 10
Par ailleurs, une couronne 40 du tram épicycloidal amontIn addition, a ring 40 of the upstream epicyclic tram
14 est liée en rotation à un porte-satellites 44 du tram épicycloidal aval 16 et une couronne 46 du tram épicycloidal aval 16 est liée en rotation au porte-satellites 38 du tram épicycloidal amont 1414 is linked in rotation to a planet carrier 44 of the downstream epicycloidal tram 16 and a ring 46 of the downstream epicyclic tram 16 is linked in rotation to the planet carrier 38 of the upstream epicyclic tram 14
Dans cette configuration, la puissance motrice qui chemine sélectivement dans les éléments des trams épicycloïdaux amont 14 et aval 16 est transmise au pont 18, et donc aux roues 20, par l'intermédiaire d'un pignon 48 qui est porté par le porte-satellites 44 du tram épicyclo idal aval 16 et qui engrène avec un arbre 50 de descente de pont engrenant
Figure imgf000008_0001
In this configuration, the motive power which selectively travels through the elements of the upstream 14 and downstream epicyclic trams is transmitted to the bridge 18, and therefore to the wheels 20, via a pinion 48 which is carried by the planet carrier 44 of the downstream epicyclic idal tram 16 and which meshes with a shaft 50 of the descent of the meshing bridge
Figure imgf000008_0001
A cet effet, l'arbre 50 de descente de pont, qui est monté à rotation dans le carter 19 de la transmission, comporte à une extrémité un pignon amont 52 qui engrène avec le pignon 48 solidaire du porte-satellites 44 du tram épicycloi'dal aval 16, et comporte à son extrémité opposée un pignon aval 54 qui engrène avec un pignon 56 d'attaque du pont 18To this end, the shaft 50 for lowering the bridge, which is rotatably mounted in the casing 19 of the transmission, has at one end an upstream pinion 52 which meshes with the pinion 48 secured to the planet carrier 44 of the epicyclic tram . downstream dal 16, and comprises at its opposite end a downstream pinion 54 which meshes with a pinion 56 for driving the bridge 18
Ainsi, comme l'illustre la figure 3, la transmission 10 permet d'établir un rapport "AR" de transmission de marche arrière en activant seulement le premier embrayage 26 et le deuxième frein 32 un premier rapport "R1" de transmission de marche avant en activant seulement le premier embrayage 26 et le troisième frein 34, un deuxième rapport "R2" de transmission de marche avant en activant seulement le deuxième embrayage 28 et le troisième frein 34, un troisième rapport "R3" de transmission de marche avant en activant seulement le premier embrayage 26 et le second embrayage 28, et un quatrième "R4" rapport de transmission de marche avant en activant seulement le second embrayage 26 et le premier frein 30Thus, as illustrated in FIG. 3, the transmission 10 makes it possible to establish a reverse gear transmission ratio "AR" by activating only the first clutch 26 and the second brake 32 a first forward gear transmission ratio "R1" by activating only the first clutch 26 and the third brake 34, a second ratio "R2" of forward transmission by activating only the second clutch 28 and the third brake 34, a third ratio "R3" of forward transmission by activating only the first clutch 26 and the second clutch 28, and a fourth "R4" gear ratio front by activating only the second clutch 26 and the first brake 30
Conformément à l'invention, le pont 18 est susceptible d'être hé sélectivement en rotation directement à l'arbre 22 de turbine du convertisseur pour obtenir un rapport supplémentaire de transmission correspondant à un cinquième rapport de transmission " de prise directe" de la transmission 10According to the invention, the bridge 18 is capable of being selectively rotated in a direct manner to the turbine shaft 22 of the converter in order to obtain an additional transmission ratio corresponding to a fifth "direct drive" transmission ratio of the transmission. 10
A cet effet, la transmission 10 comporte des moyens destinés à entraîner directement l'arbre 50 de descente de pont à l'aide de l'élément 24 de l'arbre 22 de turbine qui est commun aux deux embrayages 26 et 28To this end, the transmission 10 comprises means intended to directly drive the shaft 50 for lowering the bridge using the element 24 of the shaft 22 of the turbine which is common to the two clutches 26 and 28
Selon le premier mode de réalisation qui est représenté a la figure 1, l'élément 24 de l'arbre 22 de turbine du convertisseur comporte un pignon 58 supplémentaire qui engrène en permanence avec un pignon fixe 60 d'un arbre 62 intermédiaire de descente qui est susceptible d'être accouplé sélectivement à l'arbre 50 de descente de pont par l'intermédiaire d'un embrayage supplémentaire 64 commandéAccording to the first embodiment which is represented in FIG. 1, the element 24 of the converter turbine shaft 22 comprises an additional pinion 58 which permanently meshes with a fixed pinion 60 of an intermediate shaft 62 of descent which is capable of being selectively coupled to the shaft 50 for lowering the axle by means of an additional clutch 64 controlled
Selon le second mode de réalisation de l'invention, l'arbre 50 de descente de pont comporte un pignon supplémentaire 58 qui engrène en permanence avec un pignon fou 60 qui est susceptible d'être craboté sélectivement sur l'arbre 22 de turbine du convertisseur par l'intermédiaire d'un embrayage supplémentaire 64 commandé Dans ce dernier mode de réalisation, l'embrayage supplémentaire 64 commandé est notamment porté par l'élément 24 de l'arbre 22 de turbine et est donc agencé à l'opposé de la turbine 12 du convertisseur par rapport aux deux trains 14, 16 épicycloïdaux De plus, dans les deux modes de réalisation, l'embrayage supplémentaire 64 commandé est un embrayage à disque à commande hydraulique qui est commande par un distributeur hydraulique spécifique De la sorte, l'alimentation hydraulique de la transmission 10 reste inchangée par rapport à l'état antérieur de la technique correspondant a une transmission à quatre rapports de marche avant Ainsi, comme l'illustre la figure 3, la transmission 10 permet d'établir le cinquième rapport "R5" de transmission de marche avant en activant seulement l'embrayage supplémentaire 64 L'un ou l'autre du second embrayage 28 ou du premier frein 30 peut éventuellement rester activé Pour ce rapport de transmission, la puissance motrice chemine directement de l'arbre 22 de turbine au pont 50 sans cheminer par les trains épicycloïdaux 14 et 16According to the second embodiment of the invention, the shaft 50 for lowering the bridge comprises an additional pinion 58 which permanently meshes with a idler pinion 60 which is capable of being selectively clutched on the turbine shaft 22 of the converter by means of an additional clutch 64 controlled In this latter embodiment, the additional clutch 64 controlled is in particular carried by the element 24 of the shaft 22 of the turbine and is therefore arranged opposite the turbine 12 of the converter with respect to the two planetary gear trains 14, 16 In addition, in the two embodiments, the additional clutch 64 controlled is a hydraulically controlled disc clutch which is controlled by a specific hydraulic distributor In this way, the hydraulic supply of the transmission 10 remains unchanged compared to the prior art corresponding to a transmission with four forward gears. Thus, as illustrated in FIG. 3, the transmission 10 makes it possible to establish the fifth forward transmission ratio "R5" by activating only the additional clutch 64 Either of the second clutch 28 or the first brake 30 may possibly remain activated For this transmission ratio, the driving power travels directly from the turbine shaft 22 to the bridge 50 without traveling by the planetary gears 14 and 16
La transmission 10 selon l'invention permet donc de bénéficier d'une transmission automatique comportant un cinquième rapport "R5" de prise directe particulièrement avantageux, en terme de consommation de carburant, à haute vitesse, comme c'est le cas lors d'un parcours autoroutier The transmission 10 according to the invention therefore makes it possible to benefit from an automatic transmission comprising a fifth ratio "R5" of direct intake which is particularly advantageous, in terms of fuel consumption, at high speed, as is the case during a motorway route

Claims

REVENDICATIONS
1 Transmission (10) automatique pour véhicule automobile, du type qui comporte d'amont en aval, un convertisseur hydraulique de couple, au moins deux trains épicycloïdaux amont (14) et aval (16) coaxiaux, et au moins un pont (18) qui destiné à entraîner des roues (20) du véhicule, du type dans lequel au moins un élément des trains épicycloïdaux est é en rotation au pont (18), au moins un élément des trains épicycloïdaux (14, 16) est é en rotation à un autre élément des trains épicycloïdaux (14 16), au moins un élément des trains épicycloïdaux (14, 16) est susceptible d'être lie sélectivement en rotation à un arbre (22) d'une turbine (12) du convertisseur, et au moins un élément est susceptible d'être hé sélectivement a un carter (19) de la transmission (10), pour établir différents rapports (AR, R 1, R2, R3, R4) de transmission, caractérisée en ce que le pont (18) est susceptible d'être lié sélectivement en rotation directement à l'arbre (22) de turbine du convertisseur pour obtenir un rapport (R5) supplémentaire de transmission1 automatic transmission (10) for a motor vehicle, of the type which comprises from upstream to downstream, a hydraulic torque converter, at least two epicyclic upstream (14) and downstream (16) coaxial trains, and at least one bridge (18) which is intended to drive the wheels (20) of the vehicle, of the type in which at least one element of the planetary gear trains is rotated at the bridge (18), at least one element of the planetary gear trains (14, 16) is rotated at another element of the planetary gear trains (14 16), at least one element of the planetary gear trains (14, 16) is capable of being selectively connected in rotation to a shaft (22) of a turbine (12) of the converter, and to the least one element is capable of being selectively connected to a casing (19) of the transmission (10), in order to establish different transmission ratios (AR, R 1, R2, R3, R4), characterized in that the bridge (18 ) is capable of being selectively linked in rotation directly to the shaft (22) d e converter turbine to obtain an additional transmission ratio (R5)
2 Transmission (10) automatique selon la revendication précédente, caractérisée en ce qu'un planétaire (36) du tram épicycloidal amont (14) est susceptible d'être lié en rotation à l'arbre (22) de turbine par l'intermédiaire d'un premier embrayage (26) commandé ou bien est susceptible d'être hé au carter (19) de la transmission (10) par l'intermédiaire d'un premier frein (30) commandé, en ce qu'un porte-satellites (38) du tram épicycloidal amont (14) est susceptible d'être hé en rotation à l'arbre (22) de turbine du convertisseur par l'intermédiaire d'un second embrayage (28) commandé ou bien est susceptible d'être lie au carter (19) de la transmission (10) par l'intermédiaire d'un deuxième frein (32) commandé, et en ce qu'un planétaire (42) du tram epicycloidal aval est susceptible d'être hé au carter (19) de la transmission par l'intermédiaire d'un troisième frein (34) commandé2 automatic transmission (10) according to the preceding claim, characterized in that a planetary (36) of the upstream epicycloidal tram (14) is capable of being linked in rotation to the turbine shaft (22) by means of 'a first clutch (26) controlled or is capable of being hoisted to the casing (19) of the transmission (10) by means of a first brake (30) controlled, in that a planet carrier ( 38) of the upstream epicyclic tram (14) is capable of being rotated to the shaft (22) of the converter turbine by means of a second clutch (28) controlled or is capable of being linked to the casing (19) of the transmission (10) by means of a second brake (32) controlled, and in that a sun gear (42) of the downstream epicycloidal tram is susceptible to be hey to the casing (19) of the transmission via a third brake (34) controlled
3 Transmission (10) automatique selon la revendication précédente, caractérisée en ce qu'une couronne (40) du tram épicycio idal amont (14) est liée en rotation à un porte-satellites (44) du tram épicycloidal aval (16) qui est hé en rotation au pont (18), et en ce qu'une couronne (46) du tram épicycloidal aval (16) est liée en rotation au porte-satellites (38) du train épicycio idal (14) amont 4 Transmission (10) selon la revendication précédente, caractérisée en ce qu'elle comporte un arbre (50) de descente de pont dont un pignon amont (52) engrène avec un pignon (48) solidaire du porte-satellites (44) du tram épicycloidal aval (16) et dont un pignon aval (54) engrène avec un pignon d'attaque (56) du pont (18)3 automatic transmission (10) according to the preceding claim, characterized in that a crown (40) of the upstream epicycio idal tram (14) is linked in rotation to a planet carrier (44) of the downstream epicyclic tram (16) which is hey in rotation at the bridge (18), and in that a crown (46) of the downstream epicyclic tram (16) is linked in rotation to the planet carrier (38) of the epicycio idal train (14) upstream 4 Transmission (10) according to the preceding claim, characterized in that it comprises a shaft (50) for lowering a bridge, one upstream pinion (52) of which meshes with a pinion (48) secured to the planet carrier (44) of the downstream planetary tram (16) and of which a downstream pinion (54) meshes with a drive pinion (56) of the bridge (18)
5 Transmission (10) selon la revendication précédente, caractérisée en ce que l'arbre (50) de descente de pont comporte un pignon (58) supplémentaire qui engrène en permanence avec un pignon fou (60) qui est susceptible d'être craboté sélectivement sur l'arbre (22) de turbine du convertisseur par l'intermédiaire d'un embrayage (64) supplémentaire commandé5 transmission (10) according to the preceding claim, characterized in that the shaft (50) for lowering the bridge comprises an additional pinion (58) which permanently meshes with a idler pinion (60) which is capable of being selectively clutched on the converter turbine shaft (22) via an additional clutch (64) controlled
6 Transmission (10) selon la revendication 4, caractérisée en ce que l'arbre (22) de turbine du convertisseur comporte un pignon (58) supplémentaire qui engrène en permanence avec un pignon fixe (60) d'un arbre intermédiaire (62) de descente qui est susceptible d'être accouple sélectivement à l'arbre (50) de descente de pont par l'intermédiaire d'un embrayage (64) supplémentaire commandé 7 Transmission (10) selon l'une des revendications 5 ou6 transmission (10) according to claim 4, characterized in that the shaft (22) of the converter turbine has an additional pinion (58) which permanently meshes with a fixed pinion (60) of an intermediate shaft (62) lowering which can be selectively coupled to the lowering shaft (50) via a clutch (64) additional controlled 7 Transmission (10) according to one of claims 5 or
6, caractérisée en ce que les embrayages (26, 28, 64) et les freins (30, 32, 34) sont a commande hydraulique, et en ce que l'embrayage (64) supplémentaire est alimenté en fluide hydraulique par un distributeur spécifique 8 Transmission (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'arbre (22) de turbine traverse coaxialement les deux trains (14, 16) épicycloïdaux 9 Transmission (10) selon l'une quelconque des revendications 2 à 8, caractérisée en ce que les premier (26) et second (28) embrayages commandés sont agencés à l'opposé de la turbine (12) du convertisseur par rapport aux deux trains épicycloïdaux (14, 16) et comportent au moins un élément (24) commun6, characterized in that the clutches (26, 28, 64) and the brakes (30, 32, 34) are hydraulically operated, and in that the additional clutch (64) is supplied with hydraulic fluid by a specific distributor 8 transmission (10) according to any one of the preceding claims, characterized in that the turbine shaft (22) coaxially crosses the two planetary gear trains (14, 16) 9 transmission (10) according to any one of the claims 2 to 8, characterized in that the first (26) and second (28) controlled clutches are arranged opposite the turbine (12) of the converter with respect to the two epicyclic trains (14, 16) and comprise at least one element (24) common
10 Transmission (10) selon la revendication 5, caractérisée en ce que l'embrayage supplémentaire (64) commandé est agencé a l'oppose de la turbine (12) du convertisseur par rapport aux deux trains (14, 16) épicycloïdaux10 transmission (10) according to claim 5, characterized in that the additional clutch (64) controlled is arranged opposite the turbine (12) of the converter with respect to the two planetary gear trains (14, 16)
11 Transmission (10) selon l'une quelconque des revendications 2 à 10, caractérisée en ce que les premier (30) et troisième (34) freins commandés sont agencés de part et d'autre des deux trains (14, 16) épicycloïdaux et du deuxième frein (32) commandé, le premier (30) frein commandé étant agencé a proximité du planétaire (36) du tram épicycloidal (14) amont et le troisième frein (34) commandé étant agencé à proximité du planétaire (42) du train épicycloidal (16) aval 11 transmission (10) according to any one of claims 2 to 10, characterized in that the first (30) and third (34) controlled brakes are arranged on either side of the two epicyclic trains (14, 16) and the second controlled brake (32), the first controlled brake (30) being arranged near the sun gear (36) of the epicyclic tram (14) upstream and the third controlled brake (34) being arranged near the sun gear (42) of the train epicycloidal (16) downstream
PCT/FR2000/002581 1999-09-20 2000-09-15 Automatic gear-box comprising five forward running ratios WO2001021980A1 (en)

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FR9911725A FR2798713B1 (en) 1999-09-20 1999-09-20 AUTOMATIC TRANSMISSION HAVING FIVE FORWARD DRIVES
FR99/11725 1999-09-20

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Publication number Priority date Publication date Assignee Title
WO2011017787A1 (en) * 2009-08-14 2011-02-17 Alan Miranda Monteiro De Lima Optimised continuous and reversible automatic transmission

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FR2798713B1 (en) 2001-11-16
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