FR2700302A1 - Transmission device for four-wheel drive vehicles having transverse gearbox, with locking mechanism for central differentials - Google Patents

Transmission device for four-wheel drive vehicles having transverse gearbox, with locking mechanism for central differentials Download PDF

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Publication number
FR2700302A1
FR2700302A1 FR9300123A FR9300123A FR2700302A1 FR 2700302 A1 FR2700302 A1 FR 2700302A1 FR 9300123 A FR9300123 A FR 9300123A FR 9300123 A FR9300123 A FR 9300123A FR 2700302 A1 FR2700302 A1 FR 2700302A1
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FR
France
Prior art keywords
transmission device
differential
housing
central differential
central
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9300123A
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French (fr)
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FR2700302B1 (en
Inventor
Prenel Jean-Marc
Bardot Michel
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.)
Renault SAS
Regie Nationale des Usines Renault
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Renault SAS
Regie Nationale des Usines Renault
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Publication date
Application filed by Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR9300123A priority Critical patent/FR2700302B1/en
Publication of FR2700302A1 publication Critical patent/FR2700302A1/en
Application granted granted Critical
Publication of FR2700302B1 publication Critical patent/FR2700302B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/344—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having a transfer gear
    • 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
    • F16H3/64—Gearings having three or more central gears composed of a number of gear trains, the drive always passing through all the trains, each train having not more than one connection for driving another train
    • 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
    • F16H3/087—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 characterised by the disposition of the gears
    • F16H3/093—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 characterised by the disposition of the gears with two or more countershafts
    • F16H2003/0931—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 characterised by the disposition of the gears with two or more countershafts each countershaft having an output gear meshing with a single common gear on the output shaft

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

The gearbox (3) is mounted with its axis across the vehicle and the central differential (9) is mounted in the gearbox casing. The input gear (8) of the central differential divides the drive between the differential (11) of the transverse front drive shafts on the axis (25) and the rear axle drive gear (19). The output gear (19) is fixed to the star wheel housing (12) of the front differential.The two-position clutch (26) is controlled by the driver and will take the drive from the input gear (8) to the star wheel housing (12) or will take it through the planet wheels and carrier (28, 27) of the central differential. The invention may be used with automatic or manual gearboxes.

Description

DISPOSITIF DE TRANSMISSION MUNI D'UN DOUBLEUR
DE GAMME POUR VEHICULE A OUATRE ROUES
MOTRICES
La présente invention se rapporte au domaine technique des transmissions, et notamment des différentiels utilisés pour l'entraînement des roues motrices d'un véhicule automobile. Elle concerne plus particulièrement un dispositif de transmission muni d'un différentiel central, dont la fonction est d'assurer la répartition du couple entre l'essieu avant et l'essieu arrière d'un véhicule automobile.TRANSMISSION DEVICE PROVIDED WITH A DUPLICATOR
OF RANGE FOR WHEELED VEHICLE
MOTORS
The present invention relates to the technical field of transmissions, and in particular the differentials used for driving the drive wheels of a motor vehicle. It relates more particularly to a transmission device provided with a central differential, the function of which is to ensure the distribution of the torque between the front axle and the rear axle of a motor vehicle.

La publication FR 2593 754 de la demanderesse décrit un dispositif de transmission à quatre roues motrices, muni d'un différentiel central disposé en sortie de la boîte de vitesses, et intégré dans une architecture longitudinale. Selon cette architecture, une première sortie de mouvement du différentiel central entraîne un pignon d'attaque de la couronne de différentiel de l'essieu avant, tandis qu une seconde sortie de mouvement du différentiel central entraîne un arbre de renvoi arrière, coaxial et dans le prolongement dudit pignon d'attaque. Ce dispositif de transmission à quatre roues motrices s'adapte aux conditions d'adhérence de chacune des roues, grâce à la présence, entre les deux sorties de mouvement du différentiel, d'un système visqueux assurant le transfert du couple d'un essieu sur l'autre, en cas de perte d'adhérence.The applicant's publication FR 2593 754 describes a four-wheel drive transmission device, provided with a central differential disposed at the outlet of the gearbox, and integrated in a longitudinal architecture. According to this architecture, a first movement output from the central differential drives a drive pinion of the differential ring gear of the front axle, while a second movement output from the central differential drives a rear shaft, coaxial and in the extension of said drive pinion. This four-wheel drive transmission device adapts to the grip conditions of each wheel, thanks to the presence, between the two differential movement outputs, of a viscous system ensuring the transfer of torque from an axle to the other, in the event of loss of adhesion.

Par la publication FR 2613 015 de la demanderesse, on connaît un dispositif permettant de bénéficier d'un rapport supplémentaire sur une boîte de vitesses mécanique. Le rapport supplémentaire est obtenu par l'association d'un train épicycloidal verrouillable avec un pignon de vitesses de l'arbre primaire de la boîte. Cette disposition, spécifique d'une boîte de vitesses mécanique, implique une modification structurelle importante, excluant son extension à d'autres rapports de la transmission ou son adaptation sur une boîte de vitesses automatique. By the publication FR 2613 015 of the applicant, a device is known which makes it possible to benefit from an additional report on a mechanical gearbox. The additional report is obtained by the association of a lockable planetary gear train with a gear pinion of the primary shaft of the gearbox. This arrangement, specific to a mechanical gearbox, implies a significant structural modification, excluding its extension to other transmission ratios or its adaptation to an automatic gearbox.

La présente invention propose de doubler la gamme des rapports de transmission d'un véhicule à quatre roues motrices.The present invention proposes to double the range of transmission ratios of a four-wheel drive vehicle.

Elle concerne un dispositif de transmission pour véhicule à quatre roues motrices, comportant un différentiel central disposé en sortie du mécanisme de changement de vitesses, et assurant la répartition du couple entre l'essieu avant et l'essieu arrière du véhicule. Ce dispositif est caractérisé en ce que le différentiel central est pourvu d'un mécanisme permettant de doubler la gamme de rapports du mécanisme de changement de vitesses, indépendamment de la structure et du fonctionnement de celui-ci.It relates to a transmission device for a four-wheel drive vehicle, comprising a central differential disposed at the outlet of the gear change mechanism, and ensuring the distribution of the torque between the front axle and the rear axle of the vehicle. This device is characterized in that the central differential is provided with a mechanism making it possible to double the range of ratios of the gear change mechanism, independently of the structure and of the operation thereof.

Selon un mode de réalisation de l'invention, l'élément doubleur de gamme est constitué par un crabot pouvant être déplacé entre deux positions, sous la commande de l'utilisateur.According to one embodiment of the invention, the range doubling element consists of a dog clutch which can be moved between two positions, under the control of the user.

Selon un mode de réalisation de l'invention, le différentiel central comporte, à l'intérieur d'un boîtier, une couronne d'entrée recevant le mouvement du mécanisme de changement de vitesses, et transmettant celui-ci, d'une part au différentiel des roues avant, et d'autre part à une couronne de sortie de mouvement en direction du pont arrière.According to one embodiment of the invention, the central differential comprises, inside a housing, an input ring receiving the movement of the gear change mechanism, and transmitting it, on the one hand to the differential of the front wheels, and on the other hand to a movement output crown towards the rear axle.

Selon un mode de réalisation de l'invention, le différentiel de roues avant est monté à l'intérieur du différentiel central, et la couronne d'entrée est montée autour du boîtier du différentiel de roues avant.According to one embodiment of the invention, the front wheel differential is mounted inside the central differential, and the input ring is mounted around the housing of the front wheel differential.

Selon un mode de réalisation de l'invention, la couronne de sortie du mouvement est solidaire du boîtier de différentiel de roues avant.According to one embodiment of the invention, the output crown of the movement is integral with the front wheel differential housing.

Selon un mode de réalisation de l'invention, le crabot se déplace entre une première position, dans laquelle, il immobilise la couronne d'entrée par rapport au boîtier de différentiel de roues avant, et une seconde position, dans laquelle, il transmet le mouvement de la couronne d'entrée au boîtier de différentiel de roues avant et à la couronne de sortie, par l'intermédiaire du porte-satellite et des satellites du différentiel central.According to one embodiment of the invention, the dog moves between a first position, in which it immobilizes the input crown relative to the front wheel differential housing, and a second position, in which it transmits the movement of the input crown to the front wheel differential housing and to the output crown, via the planet carrier and the satellites of the central differential.

Selon un mode de réalisation de l'invention, le boîtier de différentiel de roues avant et la couronne de sortie tournent à la même vitesse.According to one embodiment of the invention, the front wheel differential housing and the output ring rotate at the same speed.

Selon un mode de réalisation de l'invention, le mécanisme de changement de vitesses est constitué par une boîte de vitesses automatique.According to one embodiment of the invention, the gear change mechanism is constituted by an automatic gearbox.

Selon un mode de réalisation de l'invention, le mécanisme de changement de vitesses est constitué par une boîte de vitesses mécanique.According to one embodiment of the invention, the gear change mechanism is constituted by a mechanical gearbox.

Selon un mode de réalisation de l'invention, le mécanisme de changement de vitesses est disposé transversalement dans le véhicule, le mécanisme de changement de vitesses et le différentiel central étant logés à l'intérieur du même carter de mécanisme.According to one embodiment of the invention, the gear change mechanism is arranged transversely in the vehicle, the gear change mechanism and the central differential being housed inside the same mechanism housing.

La présente invention sera mieux comprise à la lecture de la description suivante d'un mode de réalisation particulier de celle-ci, en liaison avec les dessins annexés, sur lesquels - la figure 1 est un schéma d'architecture simplifié du dispositif de
transmission de l'invention, et - la figure 2 est une coupe du différentiel central de cette
transmission, dont les parties supérieure et inférieure illustrent
respectivement deux positions de fonctionnement.The present invention will be better understood on reading the following description of a particular embodiment thereof, in conjunction with the appended drawings, in which - Figure 1 is a simplified architecture diagram of the device
transmission of the invention, and - Figure 2 is a section through the central differential of this
transmission, the upper and lower parts of which illustrate
respectively two operating positions.

Sur Ia figure 1, on a fait apparaître de façon schématique le volant 1 d'un moteur (non représenté), qui entraîne l'arbre primaire 2 d'une boîte de vitesses mécanique 3, présentant de façon classique, à l'intérieur d'un carter de mécanisme 4, deux arbres secondaires 5, 6, entraînés par I'arbre primaire 2. Chacun des trois arbres 2, 4, 6, supporte respectivement un ensemble de pignons, 2', 4', 6'. L'arbre secondaire 6, présente notamment un pignon de descente 7, sur une première couronne 8 du différentiel central 10, dont le boîtier 9 renferme le différentiel d'entraînement des roues avant, ou différentiel de roues avant 11. Ce dernier comporte de façon classique à l'intérieur d'un boîtier 12, un axe 13, des satellites 14, et deux planétaires de sortie 15, 16, entraînant respectivement deux arbres de sortie 17, 18, en direction des roues avant non représentées.Le différentiel central 10 porte par ailleurs, une seconde couronne ou couronne de sortie 19, en prise avec un pignon intermédiaire 20, lui-même solidaire d'un arbre intermédiaire 21, qui entraîne au moyen d'un renvoi d'angle 22, 23, l'arbre de sortie arrière 24, de la transmission.In FIG. 1, the flywheel 1 of a motor (not shown) is shown schematically, which drives the primary shaft 2 of a mechanical gearbox 3, conventionally presenting, inside d 'a mechanism housing 4, two secondary shafts 5, 6, driven by the primary shaft 2. Each of the three shafts 2, 4, 6, respectively supports a set of pinions, 2', 4 ', 6'. The secondary shaft 6, in particular has a lowering pinion 7, on a first ring 8 of the central differential 10, the housing 9 of which contains the front wheel drive differential, or front wheel differential 11. The latter comprises so conventional inside a housing 12, an axis 13, satellites 14, and two output planets 15, 16, respectively driving two output shafts 17, 18, towards the front wheels not shown. The central differential 10 also carries a second ring or output ring 19, engaged with an intermediate pinion 20, itself secured to an intermediate shaft 21, which drives by means of a bevel gear 22, 23, the shaft rear output 24, transmission.

En se reportant à la figure 2, on reconnait à l'intérieur du boîtier 9 la première couronne 8, et la seconde couronne 19, du différentiel central 10. La partie de la figure s'étendant au dessus de l'axe de symétrie 25, et la partie de la figure s'étendant au dessous de celuici, correspondent respectivement à deux positions de fonctionnement du différentiel central 10. Entre la première et la seconde de ces positions, le crabot 26 s'est déplacé vers la gauche, de façon à craboter la couronne d'entrée 8 sur le boîtier 12 du différentiel de roues avant 11. Dans la partie supérieure de la figure, le mouvement entrant par la couronne 8, est transmis par le crabot 26 au portesatellite 27 du différentiel central 9. I1 transite ensuite par les satellites 28, et ressort du différentiel 9 par la couronne de sortie 19. Celle-ci étant solidaire du boîtier 12, le différentiel central 9 impose à la transmission, une démultiplication, s'appliquant simultanément aux deux essieux, par l'intermédiaire du différentiel de roues avant 11, et de l'arbre de sortie arrière 24. Cette situation correspond à une première gamme de rapports de transmission.Referring to Figure 2, we recognize inside the housing 9 the first ring 8, and the second ring 19, of the central differential 10. The part of the figure extending above the axis of symmetry 25 , and the part of the figure extending below this, correspond respectively to two operating positions of the central differential 10. Between the first and the second of these positions, the dog clutch 26 has moved to the left, so clutching the input ring 8 on the housing 12 of the front wheel differential 11. In the upper part of the figure, the movement entering through the ring 8, is transmitted by the dog clutch 26 to the satellite doors 27 of the central differential 9. I1 then passes through the satellites 28, and emerges from the differential 9 by the output ring 19. The latter being integral with the housing 12, the central differential 9 requires the transmission, a reduction, applying simultaneously to both sieux, via the front wheel differential 11, and the rear output shaft 24. This situation corresponds to a first range of transmission ratios.

Dans sa seconde position de fonctionnement (partie inférieure de la figure), le crabot 26 immobilise la couronne d'entrée, 8 par rapport au boîtier 12 du différentiel de roues avant 11. Celui-ci étant toujours solidaire de la couronne de sortie 19, le différentiel central 9 est bloqué; les satellites 28 ne tournent pas, et le mouvement est transmis aux deux essieux sans être démultiplié à l'intérieur du différentiel 9. Le véhicule bénéficie ainsi d'une seconde gamme de rapports de transmission.In its second operating position (lower part of the figure), the dog clutch 26 immobilizes the input ring gear, 8 relative to the housing 12 of the front wheel differential 11. The latter being always integral with the output ring gear 19, the central differential 9 is blocked; the satellites 28 do not rotate, and the movement is transmitted to the two axles without being multiplied inside the differential 9. The vehicle thus benefits from a second range of transmission ratios.

Dans l'une et l'autre des positions de fonctionnement du différentiel central 10, le mouvement sort de celui-ci par le boîtier du différentiel avant 12 et par la couronne arrière 19. Par ailleurs, le changement de gamme de rapports est sans incidence sur la répartition du couple entre les deux essieux. Selon la géométrie du différentiel, cette répartition pourra être de 50 % pour l'essieu avant et 50 % pour l'essieu arrière, ou être différente. Dans tous les cas, le différentiel sera avantageusement associé à un organe de transfert de couple, tel qu'un système visqueux, intégré par exemple dans la transmission au niveau du pont arrière. Enfin, selon le type de véhicule équipé, le doubleur de gamme proposé par l'invention sera exploité sur tous les rapports, ou seulement sur les rapports inférieurs de la transmission.In both of the operating positions of the central differential 10, the movement exits therefrom by the front differential case 12 and by the rear crown 19. Furthermore, the change of gear range has no effect on the distribution of torque between the two axles. Depending on the geometry of the differential, this distribution may be 50% for the front axle and 50% for the rear axle, or be different. In all cases, the differential will advantageously be associated with a torque transfer member, such as a viscous system, integrated for example in the transmission at the rear axle. Finally, depending on the type of vehicle fitted, the range doubler proposed by the invention will be used on all gears, or only on the lower gears of the transmission.

En conclusion, l'invention permet de doubler la gamme de rapports d'une transmission à quatre roues motrices, indépendamment de la boîte de vitesses de celui-ci. Elle trouve une application privilégiée, mais non exclusive, sur un véhicule à quatre roues motrices toutterrain, muni d'un différentiel centrai, et équipé d'une boîte de vitesses mécanique ou automatique.  In conclusion, the invention makes it possible to double the range of ratios of a four-wheel drive transmission, independently of the gearbox thereof. It finds a preferred, but not exclusive, application on a four-wheel drive all-terrain vehicle, equipped with a central differential, and equipped with a mechanical or automatic gearbox.

Claims (10)

REVENDICATIONS 1) Dispositif de transmission pour véhicule à quatre roues1) Transmission device for four-wheeled vehicle motrices, comportant un différentiel central (10), disposé en driving, comprising a central differential (10), arranged in sortie d'un mécanisme de changement de vitesses (3), et output of a gear change mechanism (3), and assurant la répartition du couple entre l'essieu avant et l'essieu ensuring the distribution of torque between the front axle and the axle arrière du véhicule, caractérisé en ce que le différentiel central rear of the vehicle, characterized in that the central differential (10) est pourvu d'un élément (26) permettant de doubler la (10) is provided with an element (26) making it possible to double the gamme de rapports du mécanisme de changement de vitesses range of gear shifting ratios (3), indépendamment de la structure et du fonctionnement de (3), regardless of the structure and operation of celui-ci. this one. 2) Dispositif de transmission selon la revendication 1, caractérisé2) Transmission device according to claim 1, characterized en ce que l'élément (26) est constitué par un crabot, pouvant in that the element (26) consists of a dog, which can être déplacé entre deux positions, sous la commande de be moved between two positions, under the control of l'utilisateur.  the user. 3) Dispositif de transmission selon les revendications 1 ou 2,3) Transmission device according to claims 1 or 2, caractérisé en ce que le différentiel central (10) comporte, à characterized in that the central differential (10) comprises, at l'intérieur d'un boîtier (9), une couronne d'entrée (8), recevant the interior of a housing (9), an input ring (8), receiving le mouvement du mécanisme de changement de vitesses (3), et the movement of the gear change mechanism (3), and transmettant ce mouvement, d'une part au différentiel des roues transmitting this movement, on the one hand to the wheel differential avant (11) et d'autre part à une couronne de sortie de before (11) and on the other hand to an output crown of mouvement (19), en direction du pont arrière. movement (19), towards the rear axle. 4) Dispositif de transmission selon la revendication 3, caractérisé4) Transmission device according to claim 3, characterized en ce que le différentiel de roues avant (11), est monté à in that the front wheel differential (11) is mounted at l'intérieur du différentiel central (9), et en ce que la couronne inside the central differential (9), and in that the crown d'entrée (8) est montée autour du boîtier (12), du différentiel de input (8) is mounted around the housing (12), the differential roues avant (11). front wheels (11). 5) Dispositif de transmission selon la revendication 4, caractérisé5) Transmission device according to claim 4, characterized en ce que la couronne de sortie (19) est solidaire du boîtier (12) in that the output ring (19) is integral with the housing (12) du différentiel de roues avant (11).  of the front wheel differential (11). 6) Dispositif de transmission selon les revendications 3, 4 ou 5,6) Transmission device according to claims 3, 4 or 5, caractérisé en ce que le crabot (26) se déplace entre une characterized in that the dog clutch (26) moves between a première position dans laquelle, il immobilise la couronne first position in which it immobilizes the crown d'entrée (8), par rapport au boîtier (12) du différentiel de roues input (8), relative to the housing (12) of the wheel differential avant (11), et une seconde position, dans laquelle il transmet le front (11), and a second position, in which it transmits the mouvement de la couronne d'entrée (8) au boîtier (12) et à la movement of the input ring (8) to the housing (12) and to the couronne de sortie (19), par l'intermédiaire du porte-satellite output ring (19), via the planet carrier (27) et des satellites (28) du différentiel central (9). (27) and satellites (28) of the central differential (9). 7) Dispositif de transmission selon l'une des revendications 3 à 6,7) Transmission device according to one of claims 3 to 6, caractérisé en ce que le boîtier (12) et la couronne de sortie characterized in that the housing (12) and the output ring (19) tournent à la même vitesse. (19) rotate at the same speed. 8) Dispositif de transmission selon 1' une quelconque des 8) Transmission device according to any one of revendications précédentes, caractérisé en ce que le mécanisme previous claims, characterized in that the mechanism de changement de vitesses (3) est constitué par une boîte de gear change (3) consists of a gearbox vitesses automatique. automatic gears. 9) Dispositif de transmission selon l'une des revendications 1 à 7,9) Transmission device according to one of claims 1 to 7, caractérisé en ce que le mécanisme de changement de vitesses characterized in that the gear change mechanism (3) est constitué par une boîte de vitesses mécanique. (3) is constituted by a mechanical gearbox. 10) Dispositif de transmission selon l'une quelconque des10) Transmission device according to any one of revendications précédentes, caractérisé en ce que le mécanisme previous claims, characterized in that the mechanism de changement de vitesses (3) est disposé transversalement par gear change (3) is arranged transversely by rapport au véhicule, et en ce que le mécanisme de changement relation to the vehicle, and that the change mechanism de vitesses (3) et le différentiel central (9) sont logés à (3) and the central differential (9) are housed at l'intérieur du même carter de mécanisme (4).  inside the same mechanism housing (4).
FR9300123A 1993-01-08 1993-01-08 Transmission device provided with a range doubler for a four-wheel drive vehicle. Expired - Fee Related FR2700302B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9300123A FR2700302B1 (en) 1993-01-08 1993-01-08 Transmission device provided with a range doubler for a four-wheel drive vehicle.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9300123A FR2700302B1 (en) 1993-01-08 1993-01-08 Transmission device provided with a range doubler for a four-wheel drive vehicle.

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FR2700302A1 true FR2700302A1 (en) 1994-07-13
FR2700302B1 FR2700302B1 (en) 1995-03-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6729991B1 (en) * 1999-12-17 2004-05-04 Bosch Automotive Systems Corporation Combined differential gear device
US6761661B1 (en) * 2000-02-23 2004-07-13 Eduard Korotkov General-purpose mechanical holonomic element for a gear with variable changing of the rotation moment
US6827662B2 (en) 2001-10-23 2004-12-07 Bosch Automotive Systems Corporation Combined differential gear device
WO2019068417A1 (en) 2017-10-03 2019-04-11 Renault S.A.S Gear-splitting differential transmission device and four-wheel drive transmission

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0091406A2 (en) * 1982-04-05 1983-10-12 S.I.R.P. STUDI INDUSTRIALI REALIZZAZIONE PROTOTIPI S.p.A. Motor vehicle transmission system
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FR2593754A1 (en) * 1986-01-31 1987-08-07 Renault FOUR-WHEEL DRIVE TRANSMISSION DEVICE
FR2613015A1 (en) * 1987-03-24 1988-09-30 Renault Device for an additional gear ratio in a mechanical gear box

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FR2532708A3 (en) * 1981-08-24 1984-03-09 Clocheau Michel Automatic transmission for transverse engined vehicles.
EP0091406A2 (en) * 1982-04-05 1983-10-12 S.I.R.P. STUDI INDUSTRIALI REALIZZAZIONE PROTOTIPI S.p.A. Motor vehicle transmission system
JPS59128018A (en) * 1983-01-11 1984-07-24 Toyota Motor Corp 4-wheel driving trans-axle for horizontal engine
GB2142593A (en) * 1983-07-02 1985-01-23 Land Rover Uk Ltd Transmission for a four wheel drive vehicle
DE3612869A1 (en) * 1985-06-07 1986-12-11 Steyr-Daimler-Puch Ag, Wien Shift device for a planetary gearing for all-wheel drive motor vehicles
FR2593754A1 (en) * 1986-01-31 1987-08-07 Renault FOUR-WHEEL DRIVE TRANSMISSION DEVICE
FR2613015A1 (en) * 1987-03-24 1988-09-30 Renault Device for an additional gear ratio in a mechanical gear box

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Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 253 (M-339)(1690) 20 Novembre 1984 & JP-A-59 128 018 ( TOYOTA JIDOSHA K.K. ) 24 Juillet 1984 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6729991B1 (en) * 1999-12-17 2004-05-04 Bosch Automotive Systems Corporation Combined differential gear device
US6761661B1 (en) * 2000-02-23 2004-07-13 Eduard Korotkov General-purpose mechanical holonomic element for a gear with variable changing of the rotation moment
US6827662B2 (en) 2001-10-23 2004-12-07 Bosch Automotive Systems Corporation Combined differential gear device
WO2019068417A1 (en) 2017-10-03 2019-04-11 Renault S.A.S Gear-splitting differential transmission device and four-wheel drive transmission
CN111225815A (en) * 2017-10-03 2020-06-02 雷诺股份公司 Gear separation differential transmission device and four-wheel drive transmission

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