FR3025579A1 - VEHICLE DIFFERENTIAL, WITH DIFFERENTIAL HOUSING COUPLED TO AN EPICYCLOIDAL TRAIN DRIVEN BY AN ELECTRIC MACHINE - Google Patents

VEHICLE DIFFERENTIAL, WITH DIFFERENTIAL HOUSING COUPLED TO AN EPICYCLOIDAL TRAIN DRIVEN BY AN ELECTRIC MACHINE Download PDF

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Publication number
FR3025579A1
FR3025579A1 FR1458264A FR1458264A FR3025579A1 FR 3025579 A1 FR3025579 A1 FR 3025579A1 FR 1458264 A FR1458264 A FR 1458264A FR 1458264 A FR1458264 A FR 1458264A FR 3025579 A1 FR3025579 A1 FR 3025579A1
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France
Prior art keywords
differential
shaft
coupling means
coupling
vehicle
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Pending
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FR1458264A
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French (fr)
Inventor
Pierre Ploe
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PSA Automobiles SA
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Peugeot Citroen Automobiles SA
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Priority to FR1458264A priority Critical patent/FR3025579A1/en
Publication of FR3025579A1 publication Critical patent/FR3025579A1/en
Pending legal-status Critical Current

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    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B60K6/405—Housings
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4808—Electric machine connected or connectable to gearbox output shaft
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4833—Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

Un différentiel (DF) de véhicule comprend une couronne (CE) engrenant un pignon de couplage (PC) d'un arbre (AS), un axe muni de pignons satellites engrenant deux pignons planétaires (PP1-PP2) fixés à des arbres de transmission (AT1, AT2), un boîtier de différentiel fixé à la couronne (CE), auquel est fixé l'axe et comprenant une partie cylindrique circulaire, creuse pour le passage d'un arbre de transmission (AT1) et comportant des premiers moyens de couplage, un train épicycloïdal (TE) comportant un axe d'entrée (A1) couplé à un axe de sortie (A2) cylindrique circulaire, creux, emmanché sur la partie et comportant des seconds moyens de couplage coopérant avec les premiers moyens de couplage pour un couplage en rotation, et une machine électrique (ME) entraînant en rotation l'axe d'entrée (A1) pour fournir un couple choisi au différentiel (DF) via l'axe de sortie (A2) et le boîtier de différentiel.A vehicle differential (DF) comprises a crown (CE) meshing with a coupling gear (PC) of a shaft (AS), an axis provided with planet gears meshing with two planetary gears (PP1-PP2) fixed to transmission shafts (AT1, AT2), a differential case fixed to the ring gear (CE), to which is fixed the axis and comprising a circular cylindrical portion, hollow for the passage of a transmission shaft (AT1) and comprising first means of coupling, an epicyclic train (TE) comprising an input axis (A1) coupled to a hollow cylindrical circular output axis (A2), fitted on the part and comprising second coupling means cooperating with the first coupling means for a rotation coupling, and an electric machine (ME) rotating the input axis (A1) to provide a torque selected at the differential (DF) via the output shaft (A2) and the differential housing.

Description

1 DIFFÉRENTIEL DE VÉHICULE, À BOÎTIER DE DIFFÉRENTIEL COUPLÉ À UN TRAIN ÉPICYCLOÏDAL ENTRAÎNÉ PAR UNE MACHINE ÉLECTRIQUE L'invention concerne les différentiels qui sont destinés à entraîner en rotation des arbres de transmission de véhicules, éventuellement de type automobile, et plus précisément le couple que de tels différentiels peuvent fournir aux arbres de transmission. Comme le sait l'homme de l'art, de nombreuses pistes sont explorées pour diminuer la consommation de carburant des véhicules à moteur thermique en raison du caractère limité des stocks d'hydrocarbures de la terre et de la pollution induite pour cette consommation. L'une de ces pistes consiste à améliorer le rendement énergétique des groupes motopropulseurs des véhicules, par exemple, en intégrant dans la chaîne de transmission du véhicule au moins un(e) machine (ou moteur), électrique ou hydraulique ou encore à air comprimé, destinée à augmenter le couple qui est fourni par le moteur thermique. Une telle machine peut, par exemple, être additionnelle et dédiée à la fourniture de couple, et dans ce cas elle doit être associée à des moyens de stockage d'énergie. Hélas, l'ajout de machine(s) électrique(s) augmente la complexité, l'encombrement et le coût du groupe motopropulseur et de la chaîne de transmission. En variante, la machine peut être un organe déjà présent dans le véhicule, et qui est adapté pour assurer au moins deux fonctions dont celle de fourniture de couple additionnel. Hélas, cette machine qui n'est rien d'autre que l'alternateur est relativement peu efficace en termes de capacité de traction ou de propulsion. L'invention a donc notamment pour but de proposer une solution alternative offrant une bonne capacité de traction ou de propulsion tout en étant simple, peu encombrante et peu onéreuse, et n'induisant, si possible, que de faibles modifications d'organes appartenant à la chaîne de transmission.TECHNICAL FIELD The invention relates to differentials which are intended to drive in rotation the transmission shafts of vehicles, possibly of the automotive type, and more specifically the torque that can be achieved by means of an electric motor. such differentials can provide the driveshafts. As known to those skilled in the art, many avenues are explored to reduce the fuel consumption of motor vehicles because of the limited nature of the hydrocarbon stocks of the earth and the pollution induced for this consumption. One of these tracks is to improve the energy efficiency of the powertrains of vehicles, for example, by integrating into the transmission chain of the vehicle at least one machine (or motor), electric or hydraulic or compressed air , intended to increase the torque that is provided by the engine. Such a machine may, for example, be additional and dedicated to the supply of torque, and in this case it must be associated with energy storage means. Alas, the addition of electric machine (s) increases the complexity, the size and the cost of the powertrain and the chain of transmission. Alternatively, the machine may be a member already present in the vehicle, and which is adapted to provide at least two functions including the additional torque supply. Unfortunately, this machine is nothing more than the alternator is relatively inefficient in terms of traction or propulsion. The object of the invention is therefore notably to propose an alternative solution offering a good traction or propulsion capacity while being simple, compact and inexpensive, and if possible inducing only slight modifications of organs belonging to the the transmission chain.

3025579 2 Elle propose notamment à cet effet un différentiel, destiné à équiper un véhicule, et comprenant une couronne propre à engrener un pignon de couplage d'un arbre pour être entraînée en rotation, un boîtier de différentiel solidarisé fixement à cette couronne, un axe porte satellites solidarisé 5 fixement à ce boîtier de différentiel et auquel sont solidarisés au moins deux pignons satellites engrenant deux pignons planétaires propres à être solidarisés fixement à des premier et second arbres de transmission du véhicule. Ce différentiel se caractérise par le fait : 10 - que son boîtier de différentiel comprend un partie cylindrique circulaire, creuse pour le passage du premier arbre de transmission et comportant une face externe munie de premiers moyens de couplage, et - qu'il comprend également, d'une part, un train épicycloïdal comportant un axe d'entrée couplé à un axe de sortie cylindrique circulaire, creux, 15 emmanché sur la partie cylindrique circulaire et comportant une face interne munie de seconds moyens de couplage propres à coopérer avec les premiers moyens de couplage pour assurer un couplage en rotation, et, d'autre part, une machine électrique propre à entraîner en rotation l'axe d'entrée pour fournir un couple choisi au différentiel via l'axe de sortie du 20 train épicycloïdal et le boîtier de différentiel. Grâce à l'invention, on obtient d'une manière simple et peu onéreuse une « hybridation électrique » de la chaîne de transmission d'un véhicule via la couronne du différentiel. Le différentiel selon l'invention peut comporter d'autres 25 caractéristiques qui peuvent être prises séparément ou en combinaison, et notamment : les premiers moyens de couplage peuvent être agencés sous la forme de cannelures axiales, et les seconds moyens de couplage peuvent être agencés sous la forme de nervures axiales ; 30 - en variante, les premiers moyens de couplage peuvent être agencés sous la forme de nervures axiales, et les seconds moyens de couplage peuvent être agencés sous la forme de cannelures axiales ; 3025579 3 - sa machine électrique peut comprendre un évidement propre à permettre le passage du premier arbre de transmission, et l'axe d'entrée du train épicycloïdal peut être également creux afin de permettre le passage de ce premier arbre de transmission ; 5 le train épicycloïdal peut être de type dit « à couronne fixe » ; le train épicycloïdal peut être double. L'invention propose également un véhicule, éventuellement de type automobile, et comprenant un différentiel du type de celui présenté ci-avant et engrenant un pignon de couplage d'un arbre.In particular, it proposes for this purpose a differential, intended to equip a vehicle, and comprising a crown adapted to engage a coupling pinion of a shaft to be rotated, a differential case secured to said ring, an axle satellite carrier secured to this differential housing and to which are secured at least two planet gears meshing two planetary gears clean to be fixedly secured to the first and second shafts of the vehicle. This differential is characterized by the fact that: - its differential housing comprises a circular cylindrical portion, hollow for the passage of the first transmission shaft and having an outer face provided with first coupling means, and - it also comprises on the one hand, an epicyclic gear train having an input shaft coupled to a hollow cylindrical circular output shaft, fitted on the circular cylindrical portion and having an internal face provided with second coupling means adapted to cooperate with the first means; coupling means for rotational coupling, and secondly, a clean electrical machine for rotating the input shaft to provide a torque selected at the differential via the output shaft of the epicyclic gear train and the housing. of differential. Thanks to the invention, one obtains in a simple and inexpensive way an "electric hybridization" of the transmission chain of a vehicle via the differential ring. The differential according to the invention may comprise other characteristics which may be taken separately or in combination, and in particular: the first coupling means may be arranged in the form of axial splines, and the second coupling means may be arranged under the shape of axial ribs; Alternatively, the first coupling means can be arranged in the form of axial ribs, and the second coupling means can be arranged in the form of axial splines; - its electric machine may include a recess adapted to allow the passage of the first transmission shaft, and the input axis of the epicyclic train may also be hollow to allow the passage of the first transmission shaft; The epicyclic gear train may be of the so-called "fixed ring" type; the epicyclic train can be double. The invention also proposes a vehicle, possibly of automobile type, and comprising a differential of the type of that presented above and meshing with a coupling gear of a shaft.

10 Par exemple, cet arbre peut être un arbre de sortie d'une boîte de vitesses. D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après, et des dessins annexés, sur lesquels : 15 la figure 1 illustre schématiquement et fonctionnellement un exemple de différentiel selon l'invention couplé à deux arbres de transmission et à un arbre de sortie d'une boîte de vitesses, également couplée à un moteur thermique via un embrayage, et la figure 2 illustre schématiquement, dans une vue en coupe, un exemple 20 de réalisation d'un différentiel selon l'invention. L'invention a notamment pour but de proposer un différentiel DF d'hybridation électrique, destiné à équiper un véhicule à moteur(s) thermique(s) MT. Dans ce qui suit, on considère, à titre d'exemple non limitatif, que le 25 véhicule est de type automobile. Il s'agit par exemple d'une voiture. Mais l'invention n'est pas limitée à ce type de véhicule. Elle concerne en effet tout véhicule comprenant au moins un moteur thermique propre à fournir du couple à un différentiel via une boîte de vitesses. Par conséquent, l'invention concerne les véhicules terrestres, les véhicules fluviaux ou maritimes, et les 30 aéronefs. On a schématiquement représenté sur l'unique figure un exemple de réalisation d'un différentiel DF couplé à des premier AT1 et second AT2 3025579 4 arbres de transmission, auxquels sont couplées des roues motrices du véhicule, et à un pignon de couplage PC solidarisé fixement à un arbre AS. Dans cet exemple non limitatif le pignon de couplage PC est solidarisé fixement à une extrémité EA d'un arbre de sortie (ou secondaire) AS d'une 5 boîte de vitesses BV qui comprend également un arbre d'entrée (ou primaire) AE couplé à un moteur thermique MT du véhicule, via un embrayage EM. On considère dans ce qui suit, à titre d'exemple non limitatif, que la boîte de vitesses BV est de type manuel et classique. Mais l'invention n'est pas limitée à ce type de boîte de vitesses. Elle concerne en effet également et 10 notamment les boîtes de robotisées et les boîtes de vitesses automatiques. Le moteur thermique MT comprend un vilebrequin (non représenté) qui définit un arbre moteur AM couplé à l'embrayage EM afin de lui fournir du couple destiné à des roues motrices du véhicule. Par exemple, l'embrayage EM comprend notamment un volant 15 moteur solidarisé fixement à l'arbre moteur AM et un disque d'embrayage solidarisé fixement à l'arbre d'entrée AE de la boîte de vitesses BV. Dans ce qui suit, on considère, à titre d'exemple non limitatif, que l'embrayage EM est de type classique, et donc qu'il est directement contrôlé par le conducteur du véhicule via un organe de commande (comme par 20 exemple la pédale d'embrayage). Mais l'embrayage pourrait être à commande « hybride », c'est-à-dire couplé à son organe de commande via un module d'actionnement électrique. L'arbre d'entrée (ou primaire) AE et l'arbre de sortie (ou secondaire) AS de la boîte de vitesses BV sont destinés à être couplés l'un à l'autre.For example, this shaft may be an output shaft of a gearbox. Other features and advantages of the invention will become apparent upon examination of the following detailed description, and the accompanying drawings, in which: FIG. 1 schematically and functionally illustrates an example of a differential according to the invention coupled with two transmission shafts and to a transmission output shaft, also coupled to a heat engine via a clutch, and Figure 2 schematically illustrates, in a sectional view, an exemplary embodiment of a differential according to the invention. 'invention. The purpose of the invention is notably to propose a differential DF of electrical hybridization, intended to equip a vehicle with thermal motor (s) MT. In what follows, it is considered, by way of non-limiting example, that the vehicle is of automotive type. This is for example a car. But the invention is not limited to this type of vehicle. It relates in fact any vehicle comprising at least a clean engine to provide torque to a differential via a gearbox. Therefore, the invention relates to land vehicles, river or sea vehicles, and aircraft. FIG. 1 shows schematically an exemplary embodiment of a differential DF coupled to first AT1 and second AT2 3025579 4 drive shafts, to which drive wheels of the vehicle are coupled, and to a PC coupling gear fixedly secured. to an AS tree. In this nonlimiting example the coupling pinion PC is fixedly secured to an end EA of an output (or secondary) shaft AS of a gearbox BV which also comprises a coupled input (or primary) shaft AE to an MT engine of the vehicle, via an EM clutch. In the following, by way of nonlimiting example, the gearbox BV is considered to be of manual and conventional type. But the invention is not limited to this type of gearbox. It also concerns, in particular, robot boxes and automatic gearboxes. The thermal engine MT comprises a crankshaft (not shown) which defines an engine shaft AM coupled to the clutch EM to provide torque for the driving wheels of the vehicle. For example, the clutch EM comprises in particular a flywheel 15 fixedly secured to the drive shaft AM and a clutch disc fixedly secured to the input shaft AE of the gearbox BV. In what follows, it is considered, by way of nonlimiting example, that the clutch EM is of conventional type, and therefore it is directly controlled by the driver of the vehicle via a control member (as for example the clutch pedal). But the clutch could be "hybrid" control, that is to say, coupled to its control member via an electrical actuation module. The input shaft (or primary) AE and the output (or secondary) shaft AS of the gearbox BV are intended to be coupled to one another.

25 L'arbre d'entrée AE est destiné à recevoir le couple du moteur thermique MT via l'embrayage EM. L'arbre de sortie AS est destiné à recevoir le couple du moteur thermique MT via l'arbre d'entrée AE afin de le communiquer, ici, au différentiel DF. L'arbre d'entrée AE et l'arbre de sortie AS comprennent chacun des pignons de rapport PRij qui sont destinés à participer ensemble 30 de façon sélective à la définition de différent(e)s rapports (ou vitesses) sélectionnables de la boîte de vitesses BV, et notamment N rapports de marche avant. L'indice i désigne ici les pignons de rapport portés par l'arbre d'entrée AE (i = 1) et les pignons de rapport portés par l'arbre de sortie AS (i = 3025579 5 2). L'indice j désigne ici les différents rapports de marche avant. Par conséquent, j = 1 à N. On notera que dans l'exemple de réalisation illustré non limitativement sur l'unique figure la boîte de vitesses BV comprend six (N = 6) 5 rapports de marche avant. Mais elle pourrait comporter un nombre N plus ou moins important de rapports de marche avant, et par exemple quatre, cinq ou sept. Les arbres d'entrée AE et de sortie AS et leurs pignons de rapport PRij sont logés dans un espace qui est défini par au moins un carter C1, et de la préférence deux (C1 et C1') comme illustré non limitativement sur l'unique figure. Comme illustré partiellement sur les figures 1 et 2, un différentiel DF, selon l'invention, comprend au moins une couronne CE, un boîtier de différentiel BD, un axe porte satellites, au moins deux pignons satellites, deux 15 pignons planétaires PPk (k = 1 ou 2), un train épicycloïdal TE et une machine électrique ME. Le différentiel DF est, par exemple et comme illustré non limitativement sur la figure 1, solidarisé fixement à un carter C2 de l'embrayage EM. La couronne CE est destinée à engrener le pignon de couplage PC.The input shaft AE is intended to receive the torque of the heat engine MT via the clutch EM. The output shaft AS is intended to receive the torque of the heat engine MT via the input shaft AE in order to communicate it, here, to the differential DF. The input shaft AE and the output shaft AS each comprise gearpieces PRij which are intended to participate together selectively in the definition of different selectable ratios (or speeds) of the gearbox. BV speeds, including N forward gears. The index i denotes here the ratio gears carried by the input shaft AE (i = 1) and the ratio gears carried by the output shaft AS (i = 3025579 5 2). The index j here denotes the different forward gears. Therefore, j = 1 to N. It will be noted that in the embodiment shown in the non-limiting example in the single figure the gearbox BV comprises six (N = 6) forward gears. But it could comprise a number N of more or less forward gears, and for example four, five or seven. The AE input and output shafts AS and their gears PRij ratio are housed in a space that is defined by at least one housing C1, and preferably two (C1 and C1 ') as shown in non-limiting manner in the single figure. As partially illustrated in FIGS. 1 and 2, a differential DF, according to the invention, comprises at least one EC ring, a differential box BD, a satellite gate axis, at least two planet gears, two planetary gears PPk (k = 1 or 2), an epicyclic gear train TE and an electric machine ME. The differential DF is, for example and as illustrated without limitation in Figure 1, fixedly secured to a housing C2 of the clutch EM. The EC ring is intended to mesh with the PC coupling pinion.

20 Le boîtier de différentiel BD est solidarisé fixement à la couronne CE afin d'être entraîné en rotation par cette dernière (CE) lorsqu'elle est elle-même entraînée en rotation par le pignon de couplage PC. L'axe porte satellites est solidarisé fixement au boîtier de différentiel BD afin d'être entraîné en rotation par la couronne CE. Les pignons satellites sont solidarisés à l'axe porte 25 satellites et engrènent les deux pignons planétaires PPk auxquels sont solidarisés fixement et respectivement les premier AT1 et second AT2 arbres de transmission. Le boîtier de différentiel BD comprend également une partie cylindrique circulaire PCC qui est creuse afin de permettre le passage du 30 premier arbre de transmission AT1, et qui comporte une face externe munie de premiers moyens de couplage MC1. Le différentiel DF peut, comme illustré sur la figure 2, comprendre un carter de protection CP logeant le pignon de couplage PC, la couronne CE, la 3025579 6 quasi-totalité du boîtier de différentiel BD, l'axe porte satellites, les pignons satellites et les pignons planétaires PPk. Le train épicycloïdal TE comporte un axe d'entrée Al qui est couplé à un axe de sortie A2 cylindrique circulaire, creux, emmanché sur la partie 5 cylindrique circulaire PCC du boîtier de différentiel BD et comportant une face interne munie de seconds moyens de couplage MC2. Ces derniers (MC2) sont agencés de manière à coopérer avec les premiers moyens de couplage MC1 pour assurer un couplage en rotation de l'axe de sortie A2 au boîtier de différentiel BD (via sa partie cylindrique 10 circulaire PCC). Par exemple, les premiers moyens de couplage MC1 peuvent être agencés sous la forme de cannelures (ou rainures) axiales (c'est-à-dire parallèles à l'axe de rotation de l'axe de sortie A2), et les seconds moyens de couplage MC2 peuvent être agencés sous la forme de nervures axiales. Mais 15 dans une variante de réalisation les premiers moyens de couplage MC1 peuvent être agencés sous la forme de nervures axiales, et les seconds moyens de couplage MC2 peuvent être agencés sous la forme de cannelures (ou rainures) axiales. On notera que le train épicycloïdal TE peut être simple, double ou 20 triple. Un train épicycloïdal double est constitué de deux trains épicycloïdaux simples montés en série, et un train épicycloïdal triple est constitué de trois trains épicycloïdaux simples montés en série. De tels trains épicycloïdaux multiples sont couramment utilisés dans les boîtes de vitesses automatiques de véhicule. Il est rappelé qu'un train épicycloïdal TE simple comporte en 25 complément de ses axes d'entrée Al et de sortie A2, une couronne, au moins un pignon satellite engrenant la couronne, un porte satellite(s) solidarisé fixement à l'axe d'entrée Al et auquel est solidarisé fixement chaque pignon satellite, et un pignon planétaire solidarisé fixement à l'axe de sortie A2 et engrenant chaque pignon satellite.The differential gearbox BD is secured to the ring gear CE in order to be rotated by the latter (CE) when it is itself driven in rotation by the coupling pinion PC. The planet gate axle is fixedly secured to the differential gearbox BD in order to be rotated by the EC crown. The satellite gears are secured to the axis carries 25 satellites and meshes the two planetary gears PPk which are fixedly secured and respectively the first AT1 and second AT2 transmission shafts. The differential gearbox BD also includes a circular cylindrical portion PCC which is hollow to allow passage of the first transmission shaft AT1, and which has an outer face provided with first coupling means MC1. The differential DF can, as illustrated in FIG. 2, comprise a protection casing CP housing the PC coupling gear, the CE ring, the almost totality of the differential gearbox BD, the planet carrier shaft, the planet gears. and the planetary gears PPk. The planetary gear train TE comprises an input axis A1 which is coupled to a hollow circular cylindrical output axis A2, fitted on the circular cylindrical portion PCC of the differential housing BD and having an internal face provided with second coupling means MC2. . The latter (MC2) are arranged to cooperate with the first coupling means MC1 to ensure a rotational coupling of the output axis A2 to the differential housing BD (via its cylindrical portion 10 circular PCC). For example, the first coupling means MC1 can be arranged in the form of axial grooves (or grooves) (that is to say parallel to the axis of rotation of the output axis A2), and the second means Coupling MC2 can be arranged in the form of axial ribs. But in an alternative embodiment the first coupling means MC1 can be arranged in the form of axial ribs, and the second coupling means MC2 can be arranged in the form of axial grooves. It will be appreciated that the epicyclic gear train TE may be single, double or triple. A double epicyclic gear train consists of two single epicyclic gear trains connected in series, and a triple epicyclic gear train consists of three single epicyclic gear trains connected in series. Such multiple epicyclic gear trains are commonly used in automatic vehicle transmissions. It will be recalled that a simple epicyclic gear train TE comprises, in addition to its input A1 and output A2 axes, a ring gear, at least one planet pinion meshing with the ring gear, and a satellite carrier (s) secured to the axis A1 input and which is fixedly fixed each pinion satellite, and a sun gear fixedly fixed to the output axis A2 and meshing each pinion satellite.

30 Par exemple, le train épicycloïdal TE peut être de type dit « à couronne fixe ». Dans ce cas, sa couronne est fixe dans le véhicule, tandis que ses axes d'entrée Al et de sortie A2 sont entraînés en rotation selon des régimes différents, définis par son rapport de démultiplication. A titre 3025579 7 d'exemple, la couronne du train épicycloïdal TE peut être solidarisée fixement à une paroi de fixation PF du carter de protection CP du différentiel DF (voir figure 2), ainsi qu'éventuellement au carter C2 de l'embrayage EM. Mais d'autres agencements peuvent être envisagés.For example, the epicyclic gear TE may be of the type called "fixed ring". In this case, its crown is fixed in the vehicle, while its input axes A1 and A2 output are rotated at different speeds, defined by its gear ratio. By way of example, the ring gear of the epicyclic gear train TE can be secured to a fixing wall PF of the protective casing CP of the differential DF (see FIG. 2), as well as possibly to the casing C2 of the EM clutch. . But other arrangements can be envisaged.

5 La machine électrique ME est agencée de manière à entraîner en rotation l'axe d'entrée Al pour fournir un couple choisi au différentiel DF via l'axe de sortie A2 et le boîtier de différentiel BD. A titre d'exemple, la machine électrique ME peut être solidarisée fixement à un carter C2 de l'embrayage EM. Mais d'autres agencements peuvent être envisagés.The electric machine ME is arranged to rotate the input axis A1 to provide a torque selected at the differential DF via the output axis A2 and the differential gearbox BD. For example, the electric machine ME can be fixedly secured to a housing C2 of the clutch EM. But other arrangements can be envisaged.

10 On comprendra que lorsque la machine électrique ME est utilisée, elle entraîne en rotation l'axe d'entrée A1, ce qui induit un entraînement en rotation de l'axe de sortie A2, et donc du boîtier de différentiel BD (via sa partie cylindrique circulaire PCC). La rotation du boîtier de différentiel BD provoque alors l'entraînement en rotation des premier AT1 et second AT2 15 arbres de transmission, via l'axe porte satellites, les pignons satellites et les pignons planétaires PPk. Le couple produit par la machine électrique ME est ainsi transféré directement au différentiel DF où il est réparti sensiblement également entre les premier AT1 et second AT2 arbres de transmission, et où il vient compléter le couple « principal » fourni par le moteur thermique MT via 20 les arbres d'entrée AE et de sortie AS. On notera que dans une option on peut avoir un mode de fonctionnement « tout électrique » dans lequel seule la machine électrique ME fournit du couple au différentiel DF. Mais cette option nécessite que l'embrayage EM soit à commande hybride (et donc couplé à son organe de 25 commande (comme par exemple la pédale d'embrayage) via un module d'actionnement électrique), de sorte que l'arbre moteur AM puisse être temporairement découplé de l'arbre d'entrée AE par l'embrayage EM. Le rapport de démultiplication offert par le train épicycloïdal TE est spécifique à la machine électrique ME à laquelle il est couplé et dépendant 30 des performances recherchées. Ici, ce rapport de démultiplication est similaire à celui offert par un 1 er rapport de marche avant. Comme illustré non limitativement sur les figures 1 et 2, il est particulièrement avantageux que la machine électrique ME comprenne un 3025579 8 évidement propre à permettre le passage du premier arbre de transmission AT1, et que l'axe d'entrée Al du train épicycloïdal TE soit également creux afin de permettre le passage du premier arbre de transmission AT1. Ainsi, le premier arbre de transmission AT1 peut avantageusement passer au travers 5 de la machine électrique ME et des axes d'entrée Al et de sortie A2 du train épicycloïdal TE pour être solidarisé au pignon planétaire PP1 associé, ce qui offre une grande compacité et un encombrement minimal. L'invention est avantageuse car elle permet une « hybridation électrique » de la chaine de transmission d'un véhicule via la couronne du la différentiel, simple, peu onéreuse et offrant une bonne capacité de traction ou de propulsion, sans pour autant augmenter significativement la complexité de la chaine de transmission.It will be understood that when the electric machine ME is used, it drives in rotation the input axis A1, which induces a rotational drive of the output axis A2, and therefore the differential housing BD (via its part circular cylindrical PCC). The rotation of the differential housing BD then causes the rotation of the first AT1 and second AT2 15 drive shafts, via the planet gate axis, the planet gears and the planet gears PPk. The torque produced by the electric machine ME is thus transferred directly to the differential DF where it is distributed substantially equally between the first AT1 and second AT2 transmission shafts, and where it completes the "main" torque supplied by the heat engine MT via input AE and output AS trees. It will be noted that in one option it is possible to have an "all electric" operating mode in which only the electric machine ME supplies torque to the differential DF. But this option requires the EM clutch to be hybrid controlled (and thus coupled to its control member (such as the clutch pedal) via an electric actuation module), so that the motor shaft AM can be temporarily decoupled from the input shaft AE by EM clutch. The gear ratio offered by the epicyclic gear TE is specific to the electric machine ME to which it is coupled and depending on the desired performance. Here, this gear ratio is similar to that offered by a 1st forward gear. As illustrated without limitation in FIGS. 1 and 2, it is particularly advantageous for the electric machine ME to comprise a recess 8 1 adapted to permit the passage of the first transmission shaft AT1, and the input axis A1 of the epicyclic gear train TE is also hollow to allow the passage of the first transmission shaft AT1. Thus, the first transmission shaft AT1 can advantageously pass through the electric machine ME and the input A1 and output A2 axes of the epicyclic gear TE to be secured to the associated planetary gear PP1, which provides a great compactness and a minimal footprint. The invention is advantageous because it allows an "electric hybridization" of the chain of transmission of a vehicle via the ring of the differential, simple, inexpensive and offering good traction or propulsion, without significantly increasing the complexity of the chain of transmission.

Claims (9)

REVENDICATIONS1. Différentiel (DF) propre à équiper un véhicule et comprenant une couronne (CE) propre à engrener un pignon de couplage (PC) d'un arbre (AS) pour être entraînée en rotation, un boîtier de différentiel (BD) solidarisé fixement à ladite couronne (CE), un axe solidarisé fixement au boîtier de différentiel (BD) et auquel sont solidarisés au moins deux pignons satellites engrenant deux pignons planétaires (PPk) propres à être solidarisés fixement à des premier (AT1) et second (AT2) arbres de transmission dudit véhicule, caractérisé en ce que ledit boîtier de différentiel (BD) comprend une partie cylindrique circulaire (PCC) creuse pour le passage dudit premier arbre de transmission (AT1) et comportant une face externe munie de premiers moyens de couplage (MC1), et en ce qu'il comprend en outre i) un train épicycloïdal (TE) comportant un axe d'entrée (A1) couplé à un axe de sortie (A2) cylindrique circulaire, creux, emmanché sur ladite partie cylindrique circulaire (PCC) et comportant une face interne munie de seconds moyens de couplage (MC2) propres à coopérer avec lesdits premiers moyens de couplage (MC1) pour assurer un couplage en rotation, et ii) une machine électrique (ME) propre à entraîner en rotation ledit axe d'entrée (A1) pour fournir un couple choisi audit différentiel (DF) via ledit axe de sortie (A2) et ledit boîtier de différentiel (BD).REVENDICATIONS1. Differential (DF) adapted to equip a vehicle and comprising a crown (CE) adapted to mesh a coupling gear (PC) of a shaft (AS) to be rotated, a differential housing (BD) fixedly secured to said corona (CE), an axis secured to the differential housing (BD) and to which are secured at least two planet gears meshing two planetary gears (PPk) adapted to be fixedly secured to first (AT1) and second (AT2) trees of transmission of said vehicle, characterized in that said differential housing (BD) comprises a circular cylindrical portion (PCC) hollow for the passage of said first transmission shaft (AT1) and having an outer face provided with first coupling means (MC1), and in that it further comprises i) an epicyclic gear train (TE) having an input axis (A1) coupled to a hollow cylindrical circular output axis (A2) fitted on said circular cylindrical portion area (PCC) and having an inner face provided with second coupling means (MC2) adapted to cooperate with said first coupling means (MC1) to ensure a coupling in rotation, and ii) an electric machine (ME) suitable for driving in rotating said input axis (A1) to provide a selected torque to said differential (DF) via said output axis (A2) and said differential case (BD). 2. Différentiel selon la revendication 1, caractérisé en ce que lesdits premiers moyens de couplage (MC1) sont agencés sous la forme de cannelures axiales, et lesdits seconds moyens de couplage (MC2) sont agencés sous la forme de nervures axiales.2. Differential according to claim 1, characterized in that said first coupling means (MC1) are arranged in the form of axial grooves, and said second coupling means (MC2) are arranged in the form of axial ribs. 3. Différentiel selon la revendication 1, caractérisé en ce que lesdits premiers moyens de couplage (MC1) sont agencés sous la forme de nervures axiales, et lesdits seconds moyens de couplage (MC2) sont agencés sous la forme de cannelures axiales.3. Differential according to claim 1, characterized in that said first coupling means (MC1) are arranged in the form of axial ribs, and said second coupling means (MC2) are arranged in the form of axial grooves. 4. Différentiel selon l'une des revendications 1 à 3, caractérisé en ce que ladite machine électrique (ME) comprend un évidement propre à permettre le passage dudit premier arbre de transmission (AT1), et ledit axe 3025579 10 d'entrée (A1) du train épicycloïdal (TE) est creux afin de permettre le passage dudit premier arbre de transmission (AT1).4. Differential according to one of claims 1 to 3, characterized in that said electric machine (ME) comprises a recess adapted to allow the passage of said first transmission shaft (AT1), and said input axis (A1) ) of the epicyclic gear (TE) is hollow to allow the passage of said first transmission shaft (AT1). 5. Différentiel selon l'une des revendications 1 à 4, caractérisé en ce que ledit train épicycloïdal (TE) est de type dit « à couronne fixe ». 55. Differential according to one of claims 1 to 4, characterized in that said epicyclic train (TE) is of type called "fixed ring". 5 6. Différentiel selon l'une des revendications 1 à 5, caractérisé en ce que ledit train épicycloïdal (TE) est double.6. Differential according to one of claims 1 to 5, characterized in that said epicyclic gear (TE) is double. 7. Véhicule, caractérisé en ce qu'il comprend un différentiel (DF) selon l'une des revendications précédentes, engrenant un pignon de couplage (PC) d'un arbre (AS). 107. Vehicle, characterized in that it comprises a differential (DF) according to one of the preceding claims, meshing a coupling gear (PC) of a shaft (AS). 10 8. Véhicule selon la revendication 7, caractérisé en ce que ledit arbre (AS) est un arbre de sortie d'une boîte de vitesses (BV).8. Vehicle according to claim 7, characterized in that said shaft (AS) is an output shaft of a gearbox (BV). 9. Véhicule selon l'une des revendications 7 et 8, caractérisé en ce qu'il est de type automobile.9. Vehicle according to one of claims 7 and 8, characterized in that it is automotive type.
FR1458264A 2014-09-04 2014-09-04 VEHICLE DIFFERENTIAL, WITH DIFFERENTIAL HOUSING COUPLED TO AN EPICYCLOIDAL TRAIN DRIVEN BY AN ELECTRIC MACHINE Pending FR3025579A1 (en)

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FR1458264A FR3025579A1 (en) 2014-09-04 2014-09-04 VEHICLE DIFFERENTIAL, WITH DIFFERENTIAL HOUSING COUPLED TO AN EPICYCLOIDAL TRAIN DRIVEN BY AN ELECTRIC MACHINE

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FR1458264A FR3025579A1 (en) 2014-09-04 2014-09-04 VEHICLE DIFFERENTIAL, WITH DIFFERENTIAL HOUSING COUPLED TO AN EPICYCLOIDAL TRAIN DRIVEN BY AN ELECTRIC MACHINE

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002160540A (en) * 2000-11-28 2002-06-04 Aisin Seiki Co Ltd Drive unit for hybrid vehicle
FR2884459A1 (en) * 2005-04-14 2006-10-20 Peugeot Citroen Automobiles Sa HYBRID TRACTION CHAIN AND HYBRID VEHICLE EQUIPPED WITH SUCH A HYBRID TRACTION CHAIN
DE102006034985A1 (en) * 2006-07-28 2008-01-31 Gkn Driveline Deutschland Gmbh Hollow shaft and joint interior part connection arrangement, has external groove formed in area of teeth-free overturn, and axial safety units including snap ring provided in radial surface of interior part which points to shaft end

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002160540A (en) * 2000-11-28 2002-06-04 Aisin Seiki Co Ltd Drive unit for hybrid vehicle
FR2884459A1 (en) * 2005-04-14 2006-10-20 Peugeot Citroen Automobiles Sa HYBRID TRACTION CHAIN AND HYBRID VEHICLE EQUIPPED WITH SUCH A HYBRID TRACTION CHAIN
DE102006034985A1 (en) * 2006-07-28 2008-01-31 Gkn Driveline Deutschland Gmbh Hollow shaft and joint interior part connection arrangement, has external groove formed in area of teeth-free overturn, and axial safety units including snap ring provided in radial surface of interior part which points to shaft end

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