Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D25/00—Fluid-actuated clutches
  • F16D25/12—Details not specific to one of the before-mentioned types
• • 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
  • B60K6/38—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 driveline clutches
  • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• • 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
• • 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
• • 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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D25/00—Fluid-actuated clutches
  • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
  • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
  • F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
  • F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
  • F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
• • 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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D25/00—Fluid-actuated clutches
  • F16D25/10—Clutch systems with a plurality of fluid-actuated clutches
• • 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
  • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
• • 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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D21/00—Systems comprising a plurality of actuated clutches
  • F16D21/02—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways
  • F16D21/06—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways at least two driving shafts or two driven shafts being concentric
  • F16D2021/0661—Hydraulically actuated multiple lamellae clutches
• • 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

Definitions

• the present invention relates to the field of transmissions for motor vehicles. It relates in particular to a torque transmission device intended to be placed in the traction chain of a motor vehicle, between a heat engine and a gearbox.
• the invention relates more specifically to a torque transmission device for a hybrid type motor vehicle in which a rotating electric machine is arranged in the traction chain.
• hybrid type motor vehicles comprising a torque transmission device disposed between an internal combustion engine and a gearbox, a rotary electrical machine as well as a clutch and a drive member. actuation of this clutch for coupling or uncoupling in rotation a crankshaft of the internal combustion engine to a rotor of the rotary electric machine.
• the rotating electric machine can also constitute an electric brake or provide extra energy to the internal combustion engine to assist it or prevent it from stalling.
• the electric machine can act as an alternator.
• the rotating electric machine can also drive the vehicle independently of the internal combustion engine.
• Such a rotary electrical machine can be in line with the torque transmission device, that is to say that the axis of rotation of the rotor of the rotary eclectic machine is coincident with the axis of rotation of the torque transmission device. torque as described in document FR 3 015 380.
• the rotary electric machine can be offset relative to the torque transmission device, that is to say that the axis of rotation of the rotor of the rotary eclectic machine is offset from the axis of rotation of the torque transmission device.
• the architecture of the torque transmission devices is becoming more and more compact and it is sometimes difficult to house all the components.
• it is necessary to position the input clutch and the associated actuating member on the side of the heat engine, which poses a number of problems and in particular the supply of fluid to the clutch and its actuating member.
• the torque transmission device between the heat engine and the electric machine described in the document FR 3 015 380 is not fully satisfactory. Indeed, it includes, on the same radial height, offset axially, the springs of a torsional oscillation damper and the linings of a friction clutch.
• the clutch actuator also offset axially from the friction linings completes the device. This axial succession of elements of the transmission chain does not meet the compactness expectations of the current market.
• the invention aims to improve the existing design by benefiting from a torque transmission device making it possible to reconcile the requirements of axial and / or radial compactness while guaranteeing a good supply of fluid to the clutch.
• a torque transmission device in particular for a motor vehicle, comprising:
• a first torque input element in rotation about an X axis capable of being coupled in rotation to a crankshaft of a heat engine, comprising a rear part and a front part,
• an input clutch selectively and frictionally coupling the torque input and torque output elements
• an actuation system associated with the input clutch comprising a pressure chamber and an axially movable piston, a protective casing arranged to at least partially envelop the torque input element, the torque output element, the input clutch and the actuation system, said casing having an axially extending internal wall around the X axis and comprising a network for the passage of a fluid arranged to supply said actuation system with fluid,
• the protective casing is composed of a radial wall and an internal wall, the internal wall extending axially around the axis X.
• the casing has a general shape substantially in "L" shape, the base of the "L” being located on the side of the axis of rotation X.
• the fluid passage network comprises a first axial portion located in the internal wall and an upstream radial orientation pipe located in the radial wall of the protective casing and connected to the first portion.
• the upstream pipe is formed in an upper portion of the casing, intended to be disposed above the X axis.
• the upstream pipe thus makes it possible to conduct the fluid by gravity or by means of a device ensuring the flow of fluid, such as a pump or an actuator, to the first portion.
• the protective casing can be fixed to the internal combustion engine by means of fixing means, for example of the screw or rivet type.
• the housing protection can be fixed on the casing of the electric motor so as to ensure proper positioning of the clutch.
• the fluid passage network is made of material with the protective casing. Consequently, the fluid passage network follows the shape of the protective casing and has a general shape substantially in an "L” shape, the base of the "L” being situated on the side of the axis of rotation X.
• the rear part of the torque input element formed radially outside and inside said internal wall of the protective casing comprises at least one through hole which allows said fluid to pass through. across said part of the torque input element.
• said element no longer forms an obstacle to the circulation of the fluid from the fluid passage network, this which facilitates the access of the fluid to certain elements arranged in its vicinity, such as a pressure chamber associated with an axially movable piston intended to transmit a force for actuation of the piston towards a multidisc assembly of the clutch inlet, a balancing chamber located opposite the pressure chamber with respect to the piston, and / or a needle bearing disposed between the torque input element and the hub of a shaft full of gearbox speeds.
• the fluid is a cooling and / or lubrication fluid.
• the fluid is oil, such as gearbox oil
• the rear part of the torque input element is composed of a first and second axial portion as well as a radial wall connecting the first axial portion to the second axial portion.
• the input clutch, the first axial portion, the internal wall of the protective casing, and the second axial portion succeed one another radially in approach to the axis X.
• the radial succession is understood in terms of radial distance.
• the various aforementioned elements do not overlap radially, that is to say that they are successively one under the other.
• the device further comprises a rolling member located radially between the internal wall of the protective casing and the torque input element.
• the rolling member supports the torque input element and is composed of an internal ring in contact with the torque input element, in particular the front part of the torque input element and d '' an outer ring in contact with the protective casing, in particular with the internal wall of the protective casing.
• the device further comprises a first output clutch rotating around the axis X, selectively and frictionally coupling a second torque input element capable of being coupled to said first torque output element and a second torque output element capable of being coupled in rotation to a first input shaft of a gearbox.
• the device further comprises a second output clutch rotating around the axis X, selectively and frictionally coupling said second torque input element and a third torque output element capable of being coupled in rotation to a second input shaft of a gearbox, the first and second output clutch being stacked radially.
• the first output clutch is that located radially on the outside, that is to say the furthest from the axis of rotation X of the device.
• the second output clutch is the one located radially inside, that is to say the one closest to the axis of rotation of the device.
• the second torque input element corresponds to the input disc holder of a double clutch mechanism comprising the first and second output clutch.
• the piston of each clutch actuating member can be controlled by an internal position sensor which controls the clutch or by measuring the hydraulic pressure when the clutch is closed or by measuring the volume of fluid injected or by measuring a displacement quantity in the electric motor or by measuring a force quantity or by measuring the current consumed in the electric motor.
• the second torque input element comprises an electrical connection zone capable of being linked in rotation with an electric machine rotating about an axis parallel to the axis of rotation X.
• the electrical connection zone is axially offset from the input clutch and / or the output clutches. The electric machine is then called "off-line”.
• the electrical connection area can be welded, riveted or come in one piece with the second torque input element.
• This arrangement makes it possible to position the electric machine as a function of the space available in the vehicle's traction chain. This arrangement makes it possible in particular not to have to place the electric machine axially following the clutches, which would be negative for the axial compactness. This arrangement makes it possible in particular not to have to place the electric machine radially beyond the clutches, which would be negative for the radial compactness.
• the electrical connection zone of the second torque input element comprises a crown capable of being meshed directly by a pinion of the rotary electric machine.
• the crown has a helical toothing of complementary shape to the pinion of the rotary electric machine.
• a chain or belt can be used to connect the rotating electrical machine to the electrical connection area.
• the second torque input element prefferably defines a rotor support for an electric machine rotating around the axis of rotation.
• the electric machine is then "in-line”.
• the clutches can be of the multi-disc type.
• a multidisk assembly is an assembly comprising at least one friction disc integral in rotation with one of the input and output disc carriers, at least two plates respectively arranged on the side and other of each friction disc, integral in rotation with the other of the inlet and outlet disc holders and friction linings arranged between the plates and a friction disc, the clutches describing a disengaged position and a engaged position in which said plates and the friction disc pinch the friction linings so as to transmit a torque between an input disc holder and an output disc holder.
• the clutch comprises between two and seven friction discs, preferably four friction discs.
• the input and output clutches are wet.
• the clutches being contained in at least one sealed chamber filled with a fluid, in particular oil.
• a wet clutch is a clutch which is suitable for operating in an oil bath.
• the electrical connection zone, the first output clutch and the second output clutch are stacked radially in proximity to the axis X.
• FIG. 1 shows an axial sectional view of one of the torque transmission device according to an embodiment of the invention.
• a torque transmission device 1 comprising:
• the third output element 7 is arranged in parallel with the second output element 6 in the direction of the torque transmission. Each of these elements rotates around an axis of rotation X of the device.
• the second and third output elements 6, 7 comprise output interfaces whose internal periphery is grooved and able to cooperate, respectively with a first and a second gearbox shaft.
• a torsion damper device (not shown) can be positioned between the crankshaft of the heat engine and the torque input element 2.
• the device also comprises an input clutch 10 which selectively and frictionally couples the torque input element 2 and the first torque output element 4 in the direction of the torque transmission.
• the input clutch 10 comprises:
• a multi-disc assembly 13 comprising several friction discs, here three, integral in rotation with the outlet disc holder 12, several plates respectively arranged on either side of each friction disc, integral in rotation with the disc holder inlet 11 and friction linings arranged between the plates and a friction disc, fixed on each side of the friction discs, the clutch 10 describing a disengaged position and a engaged position in which said plates and the friction disc pinch the linings friction so as to transmit a torque between the input disc holder and the output disc holder.
• Each disc holder 1 1, 12 synchronizes in rotation all of the plates and all of the friction discs.
• Each disc holder 11, 12 has a cylindrical skirt on which the plates and the friction discs are mounted.
• the friction discs of the multidisc assembly 13 cooperate with the cylindrical skirt of the outlet disc holder 12 along their radially inner periphery by splines. The friction discs are therefore radially outside the cylindrical skirt.
• the plates of the multidisc assembly 13 cooperate with the cylindrical skirt of the input disc carrier 1 1 along their radially outer periphery by splines. The plates are therefore radially inside the cylindrical skirt.
• the torque input element 2 allows the arrangement of an actuation system 20 associated with the input clutch 10.
• the device 1 also comprises a first output clutch E1 selectively and frictionally coupling the second torque input element 5 and the second torque output element 6.
• the first output clutch E1 comprises :
• a multi-disc assembly 123 comprising several friction discs, here four, integral in rotation with the outlet disc holder 122, several plates respectively arranged on either side of each friction disc, integral in rotation with the disc holder inlet 121 and friction linings arranged between the plates and a friction disc, fixed on each side of the friction discs, the clutch E1 describing a disengaged position and a engaged position in which said plates and the friction disc pinch the linings friction so as to transmit a torque between the input disc holder and the output disc holder.
• the device 1 also comprises a second output clutch E2, selectively and frictionally coupling the second torque input element 5 and the third torque output element 7.
• the first output clutch E2 includes:
• a multi-disc assembly 133 comprising several friction discs, here five.
• the 133 multi-disc assembly has the same technical characteristics as the E1 clutch multi-disc assembly.
• the linings can be fixed to the friction discs, in particular by gluing, in particular by riveting, in particular by overmolding.
• the linings are fixed to the plates.
• Each disc holder 11, 12, 121, 122, 131, 132 can synchronize in rotation all of the plates or all of the friction discs.
• the plates can be secured in rotation to the input disc holder 1 1, 121, 131 and the friction discs can be secured to the outlet disc holder 12, 122, 132.
• the plates can be integral in rotation with the output disc holder 12, 122, 132.
• the discs can be secured in rotation with the input disc holder 1 1, 21, 31.
• the clutches are wet type and have between two and seven friction discs, preferably four friction discs. Such multi-disc clutches make it possible to limit the radial height and limit the axial extent.
• the output clutches E1, E2 can be arranged so as not to be simultaneously in the same clutch configuration. However, they can simultaneously be configured in their disengaged position.
• the device 1 further comprises a protective casing 27 arranged to at least partially envelop the torque input element 2, the torque output element 4 the input clutch 10 and the actuation system 20.
• the casing 27 is composed of a radial wall 26 and an internal wall 28 extending axially around the axis X and has a general shape substantially in "L" shape, the base of the "L” being located on the side of the axis of rotation X.
• the casing comprises a network for the passage of a fluid 80 arranged to supply fluid to said actuation system 20.
• the network for the passage of fluid 80 comprises a first axial portion 81 situated in the wall internal and an upstream pipe 82 of radial orientation situated in the radial wall 26 of the protective casing connected to the first portion 81.
• the upstream pipe 82 is formed in an upper portion of the casing, intended to be disposed above the X axis.
• the upstream pipe 82 thus makes it possible to conduct the fluid by gravity or by means of a device ensuring the flow of the fluid, such as a pump or an actuator, to the first portion 81.
• the torque input element 2 consists of a rear part 2a and a front part 2b.
• the rear part 2a of the torque input element 2 is formed radially outside and inside said internal wall 28.
• the internal wall 28 is surrounded radially on both sides by the rear part 2a.
• the rear part 2a of the torque input element 2 is composed of a first and second axial portion 2ai, 2a3 as well as a radial wall 2a2 connecting the first axial portion to the second axial portion.
• the input clutch 10, the first axial portion 2ai, the internal wall 28 of the protective casing 27, and the second axial portion 2a 3 succeed one another radially in proximity to the axis X.
• c ' is the first axial portion 2ai which is formed radially outside the internal wall 28 and it is the second axial portion 2a3 which is formed radially inside the internal wall 28.
• the casing 27 is sealed by means of a series of seals. More particularly, a seal 29 is arranged radially between the internal wall 28 and the second axial portion 2a 3 . According to another embodiment, the seal 29 can be integrated at bearing 90 or be located in front of the bearing.
• the seals used in the context of the present invention can be dynamic lip seals.
• the casing 27 can be fixed to the internal combustion engine or to the engine of the electric machine by means of fixing means, for example of the visible screw or rivet type.
• the rear part 2a of the torque input element 2 comprises at least one through hole which allows the passage of the cooling and / or lubrication fluid through said rear wall 2a.
• the rear part 2a comprises at least two bores 83 passing radially through the first axial portion 2ai, said portion being located radially outside the internal wall 28 so as to allow the passage of the fluid radially through the first axial portion 2ai.
• the through holes 83 allow the fluid to be brought into the actuation system 20.
• the device further comprises a main hub 50 of axis of rotation X.
• the second torque input element 5 also called input disk holder 5 common to the output clutches E1 and E2 is fixedly fixed by welding to main hub 50.
• the main hub 50 supports the first and second output clutch E1, E2 via the common input disc carrier 5.
• the main hub 50 is therefore coupled in rotation to the torque input element 2
• the torque input element 2 is coupled to an engine shaft driven in rotation by the crankshaft of an engine, as described above, and the clutch 10 is closed, then the main hub 50 is driven by 'a rotation movement similar to that of the motor shaft.
• the first output clutch E1 is arranged radially above the second output clutch E2.
• the input clutch 10, the first clutch E1 and the second clutch E2 are in the open state, also called “normally open”, and are selectively actuated in operation by a control device (not shown) for passing from the open state to the closed state.
• the clutches are each controlled by an actuation system 20, 30, 40 which will be described later.
• Each actuation system 20, 30, 40 is arranged to be able to configure the clutches in any configuration between the clutch configuration and the disengaged configuration.
• control device manages the oil supply.
• the control device is connected to the housing of protection 27 which includes the fluid passage network 80 as well as to the main hub 50 which comprises channels not visible on the section planes of FIG. 1.
• Each actuation system 20, 30, 40 includes:
• a pressure chamber 21, 31, 41 arranged to receive a pressurized fluid
• Each actuation system 20, 30, 40 further comprises an elastic return element 24, 34, 44, arranged to generate an axial force opposing the movement of the piston
• the piston 22 is arranged to transmit a first axial force, exerted parallel to the longitudinal axis X, to the input clutch 10 via an upper part collaborating with the friction elements (flanges 13 and friction discs 14) of said input clutch 10, and of a lower part collaborating with a force generator to configure the input clutch 10 in one of the configurations detailed above.
• the piston 22 includes external supports 61 which extend axially towards the front AV in order to be able to press the end flange 13 of the multidisk assembly 12 of the input clutch 10 against a friction disc 14 on the one hand, and against an external reaction means formed directly in the first torque output element 4 on the other hand.
• the supports 61 are discontinuous.
• the piston 22 is axially movable, here from rear to front between a disengaged position and a engaged position which correspond respectively to the open and closed states of the input clutch 10.
• the piston 22 of the clutch inlet 10 is disposed axially between the pressure chamber 21, located axially at the rear and the balancing chamber 23 located axially at the front.
• the piston 22 takes the form of a corrugated sheet and is curved axially forwards AV at its outer radial end.
• the external supports 61 extend parallel to the longitudinal axis X towards the front AV and through openings arranged through the entry web 15.
• the piston 22 can be obtained by stamping.
• the pressure chamber 21 of the actuation system 20 of the input clutch 10 is arranged to receive a certain volume of hydraulic fluid under pressure in order to generate an axial force on the lower part of the piston 22 and thus to configure the input clutch 10 in one of the configurations described above.
• the pressurized hydraulic fluid is advantageously routed via the fluid passage network 80 (pipes 81 and 82 as shown on the cutting plane) then by at least one bore passing at least in part through the torque input element. 2, in particular the first axial portion 2ai, and opening radially into the pressure chamber 21 at an external face of said axial portion 2ai.
• the pressure chamber 21 which generates the force of the piston 22 of the input clutch 10 is associated with a balancing chamber 23 arranged to receive a certain volume of hydraulic fluid.
• the fluid, of the lubrication or cooling type is advantageously conveyed by means of low pressure fluidic circulation conduits (not shown on the cutting plane) then by at least one bore passing at least partially through the inlet element. of torque 2, in particular the first axial portion 2ai, and opening radially into the balancing chamber 23 at an external face of said axial portion 2ai.
• the hole A leaks from the balancing chamber 23. This leak allows the lubrication of the clutch 10 by means of radial holes arranged on the torque output element (4) (not shown).
• the elastic return element 24 of the actuating system 20 of the input clutch 10 is located radially outside the balancing chamber 23.
• the elastic return element 34 is disposed axially between the input web 15 and the piston 22 of the actuating system 10 of the input clutch.
• the piston 22 has a curved outer radial end defining a bearing surface for exerting the axial force on the multidisc assembly, continuous or discontinuous in the example considered.
• the piston 32 is arranged to transmit an axial force, exerted parallel to the longitudinal axis X, to the first clutch E1 via a first part upper collaborating with the friction elements of said first clutch E1, and its second lower part collaborating with a force generator to configure the first clutch E1 in one of the configurations detailed above.
• the piston 32 includes external supports which extend axially towards the front AV in order to be able to press the end flange of the multidisk assembly of the first clutch E1 against a friction disc on the one hand , and against an external reaction means formed directly in the first torque output element 3 on the other hand.
• the supports are discontinuous.
• the piston 32 is axially movable, here from rear to front between a disengaged position and a engaged position which correspond respectively to the open and closed states of the first clutch E1.
• the piston 32 of the first clutch E1 is disposed axially between the pressure chamber 31, located axially at the rear and the balancing chamber 33 located axially at the front.
• the piston 32 takes the form of a corrugated sheet and is curved axially forwards AV at its outer radial end.
• the external supports extend parallel to the longitudinal axis X towards the front AV and through openings arranged through the common input disc holder 5.
• the piston 32 can be obtained by stamping.
• the pressure chamber 31 of the actuation system 30 is arranged to receive a certain volume of hydraulic fluid under pressure in order to generate an axial force on the second part of the piston 32 and thus to configure the first clutch E1 in one of the configurations previously described.
• the pressurized hydraulic fluid is advantageously conveyed by means of high pressure fluidic circulation conduits (not shown on the cutting plane) passing at least partially through the main hub 50 and opening radially into the pressure chamber 31 at a outer face of said main hub 50.
• the pressure chamber 31 which generates the force of the piston 32 of the first clutch E1 is associated with a balancing chamber 33 arranged to receive a certain volume of hydraulic fluid.
• the fluid, of the lubrication or cooling type is advantageously conveyed by means of low pressure fluidic circulation conduits (not shown on the cutting plane) passing through at least part of the hub. main 50 and opening radially into the balancing chamber 33 at an external face of said main hub 50.
• the elastic return element 34 of the actuation system 30 of the first clutch E1 is located radially outside the balancing chamber 33 of the first clutch E1.
• the elastic return element 34 is disposed axially between the input disc carrier common 5 to the clutches E1, E2 and the piston 32 of the actuation system 30 of the first clutch E1.
• the second clutch E2 and the elastic return element 34 of the actuation system 30 of the first clutch E1 overlap radially.
• the elastic return element 34 of the actuation system 30 of the first clutch E1 is a Belleville washer or is composed of helical springs.
• the elastic return element 34 of the piston 32 is formed by a plurality of helical springs interposed axially between a rear wall of the balancing cover 35 and said piston 32.
• the actuation system 40 is linked to the second clutch E2 by means of a piston 42.
• the piston 42 is arranged to transmit a second axial force, exerted parallel to the longitudinal axis X, to the first second clutch E2 via a first upper part collaborating with the friction elements (flanges and friction discs) of said second clutch E2, and its second lower part collaborating with a force generator to configure the second clutch E2 in one of the configurations detailed above.
• the piston 42 includes external supports which extend axially towards the rear AR. The supports come to bear on the end flange of the multi-disc assembly of the second clutch E2. In the example shown in Figure 1, the supports form a continuous crown.
• the second piston 42 is axially movable, here from front to rear between a disengaged position and a engaged position which correspond respectively to the open and closed states of the second clutch E2.
• the piston 32 of the first clutch E1 and the piston 42 of the second clutch E2 move axially in the opposite direction to pass for example from the disengaged position to the engaged position.
• the pressure chambers 31, 41 of the present invention exert axially opposite actuation forces on said pistons 32, 42.
• the actuation force of the piston 32 is directed axially forward while the force actuating piston 42 is directed axially rearward.
• the piston 42 is controlled to clamp axially, in the engaged position, said multidisk assembly of the second clutch E2 against reaction means.
• the reaction means are formed directly on the front periphery of the common input disc holder 5.
• the elastic return element 44 of the actuation system 40 of the second clutch E2 is formed by a plurality of helical springs interposed axially between a front wall of a balancing cover 45 of the chamber d balancing 43 and said piston 42.
• Holes B and C leak the balancing chambers E1 and E2 in order to lubricate and / or cool them.
• the torque transmission device also comprises three bearings 71, 72, 73.
• a first axial bearing 71 is interposed between the torque input element 2 and the output element 6 in order to withstand the axial forces of the torque input element 2 despite the different rotational speeds which can respectively rotate the input shaft and the first transmission shaft.
• a second axial bearing 72 is axially interposed between the torque output element 6 defining the clutch output disc holder E1 and the torque output element 7 defining the clutch output disc holder E2 in order to be able to transmit an axial load between the two output disc carriers 22, 32 which can rotate at different speeds when the first and second clutches E1, E2 are configured in a different configuration
• a third axial bearing 73 is interposed between the torque output element 7 of the clutch E2 and the main hub 50.
• the bearings 71, 72, 73 are rolling bearings with a first and second disc between which a plurality of rolling bodies is disposed.
• the device further comprises a rolling member 90, preferably a ball bearing, located radially between the internal wall 28 of the protective casing 27 and the torque input element 2, preferably between the internal wall 28 and the second axial portion 2a3, of the rear part 2a.
• a rolling member 90 preferably a ball bearing
• the rolling member 90 supports the torque input element 2 and is composed of an internal ring 90b in contact with the torque input element 2 in particular the front part 2b of the element torque input and an external ring 90a in contact with the protective casing 27, in particular with the internal wall 28 of the protective casing.
• the second torque input element 5 comprises an electrical connection area 65 capable of being linked in rotation with a rotary electrical machine (not shown) around an axis parallel to the axis of rotation.
• the electrical connection area 65 is here axially offset from the clutch 10.
• the electrical connection area 65, the first output clutch E1 and the second output clutch E2 are stacked radially in proximity to the X axis.
• the electric machine is so-called "off-line” because it is not concentric with the drive shaft but on a parallel shaft.
• the electrical connection area 65 is able to cooperate directly with a pinion of the rotary electrical machine.
• the electrical connection area 65 can be produced in the form of a crown capable of being meshed directly by a pinion or indirectly (belt, chain, etc.) of the rotary electrical machine (not visible).
• the crown can have a helical toothing of complementary shape to the pinion of the rotary electric machine.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
• One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67001893

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (16)

• 2018
  • 2018-12-20 FR FR1873598A patent/FR3090768B1/fr not_active Expired - Fee Related
• 2019
  • 2019-12-17 CN CN201980090635.6A patent/CN113366236A/zh active Pending
  • 2019-12-17 EP EP19832332.1A patent/EP3899300A1/de active Pending
  • 2019-12-17 WO PCT/EP2019/085782 patent/WO2020127370A1/fr unknown

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