WO2022233356A1 - Hybrid transmission, and drive train having a hybrid transmission - Google Patents

Hybrid transmission, and drive train having a hybrid transmission Download PDF

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Publication number
WO2022233356A1
WO2022233356A1 PCT/DE2022/100241 DE2022100241W WO2022233356A1 WO 2022233356 A1 WO2022233356 A1 WO 2022233356A1 DE 2022100241 W DE2022100241 W DE 2022100241W WO 2022233356 A1 WO2022233356 A1 WO 2022233356A1
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WO
WIPO (PCT)
Prior art keywords
electric machine
torque
hybrid transmission
transmission
drive train
Prior art date
Application number
PCT/DE2022/100241
Other languages
German (de)
French (fr)
Inventor
Steffen Lehmann
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102022106550.2A external-priority patent/DE102022106550A1/en
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2022233356A1 publication Critical patent/WO2022233356A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • 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
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching 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
    • B60K6/26—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 motors or the generators
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • 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
    • B60K6/26—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 motors or the generators
    • B60K2006/266—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 motors or the generators with two coaxial motors or generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator

Definitions

  • the invention relates to a hybrid transmission for a hybrid vehicle, with a first torque drive train, which has an input shaft that can be connected to an internal combustion engine and a first electric machine/electrical machine/e-machine that can be connected or connected to the input shaft in a torque-transmitting manner, a second torque drive train that has a has a different second electric machine/electrical machine/e-machine than the first electric machine, an output shaft/drive axle which can be connected or connected in a torque-transmitting manner to the first torque drive train and/or to the second torque drive train, the first electric machine and the second electric machine being arranged coaxially are.
  • the invention relates to a drive train with such a hybrid transmission.
  • WO 2019/242 798 A1 discloses a drive unit for a drive train of an electrically drivable motor vehicle, in particular a hybrid motor vehicle, with a first electric machine and a second electric machine and a first shaft and an output shaft, with a rotor of the first electric machine is non-rotatably connected to the first shaft and a rotor of the second electric machine is non-rotatably connected to the output shaft and the drive unit also has a separating clutch with which the rotor of the first electric machine can be connected or connected to the output shaft for torque transmission, wherein the drive unit also has a connection element for connecting an internal combustion engine, the first electrical machine being operable in generator mode and the rated speed n1 of the first electrical machine for the rated speed n2 of the second electrical M machine is in the ratio n1 > 1.2 x n2.
  • Various transmission structures of such a hybrid transmission are also known from patent applications US 2016/02185
  • hybrid transmissions are also referred to as dedicated hybrid transmissions (DHT).
  • DHT dedicated hybrid transmissions
  • the mechanical part of the transmission is simplified, for example by eliminating the reverse gear, and instead at least one electric machine integrated in the transmission is used to provide the full range of functions.
  • Dedicated hybrid transmissions can be derived from known transmission concepts, i.e. double clutch transmissions, torque converter planetary transmissions, continuously variable transmissions (CVT) or automated manual transmissions.
  • the electrical machine becomes part of the transmission, and it can be connected to different transmission shafts.
  • one or more power-split operating states can also be generated in combination with a planetary gear.
  • a serial hybrid mode is understood to mean that the internal combustion engine no longer has a mechanical/torque-transmitting connection to the drive axle/output shaft.
  • the internal combustion engine drives the first electric machine, which mainly functions as a generator, which in turn supplies the second electric machine, which mainly functions as a traction motor/drive motor, with electricity or charges a battery.
  • the drive axle is driven by the second electric machine.
  • a parallel hybrid mode is understood to mean that the internal combustion engine has a mechanical/torque-transmitting connection to the drive axle/output shaft.
  • the second electric machine can run idle, boost or recuperate.
  • a hybrid transmission and a drive train with a hybrid transmission are to be provided, which are designed to save as much space as possible even at high torques and without restricting functionality.
  • this object is achieved in a generic device according to the invention in that rotors of the first electric machine are attached to a first rotor shaft in a torque-proof manner, rotors of the second electric machine are attached to a second rotor shaft in a torque-proof manner, and the second rotor shaft is designed as a hollow shaft, in which is rotatably mounted the first rotor shaft.
  • the second rotor shaft can itself be a hollow shaft in order, for example, to transport coolant or brake fluid within the rotor shaft.
  • the second rotor shaft can also be designed as a solid shaft radially inside the hollow shaft. that at least one of the first electric machine and the second electric machine is designed as an axial flow machine.
  • the magnetic flux in axial flux machines runs parallel to the axis of rotation.
  • Axial flow machines which are also referred to as disc rotor machines, are known, for example, from DE 10 2019 122 314 A1.
  • the first electric machine and the second electric machine can each be designed as an axial flow machine. In this way, the power density can be further increased compared to known hybrid transmissions.
  • one of the first electric machine and the second electric machine can be designed as an axial flux machine and the other of the first electric machine and the second electric machine can be designed as a radial flux machine.
  • the second electric machine can be designed as an axial flow machine, so that high torques can be provided at the output shaft, particularly in the serial hybrid mode.
  • the first electric machine can be designed as an axial flow machine, so that, for example, boosting in the parallel hybrid mode is particularly powerful.
  • the first rotor shaft can reach through the first electric machine axially.
  • the second rotor shaft can reach through the second electric machine axially. Provision is particularly preferably made here for both rotor shafts to reach through the respective electric machine axially, i.e. to be present axially on both sides of the respective rotors of the corresponding electric machine. In this way, corresponding axial points of application on the rotor shafts can be achieved in a favorable manner.
  • first rotor shaft provision can then be made for the first rotor shaft to be positioned axially outside and axially on both sides of the first electric machine or their rotors is mounted.
  • second rotor shaft is mounted axially outside and axially on both sides of the second electric machine or its rotors.
  • the first electric machine and the second electric machine can be arranged axially adjacent. This makes it particularly easy to ensure that the second electric machine is supplied with electricity that was generated by the first electric machine.
  • the first electric machine and the second electric machine can both be arranged on the same axial side of a transmission, preferably on the side of the transmission opposite the internal combustion engine.
  • This can represent a geometry that is favorable in terms of installation space, and the supply lines can also be laid particularly favorably within the transmission.
  • the first electric machine can be coupled or can be coupled to the internal combustion engine and essentially operated by it as a generator, and the second electric machine can essentially function as a drive motor.
  • the first electric machine preferably serves as a generator for supplying the second electric machine with electricity. This means that the first electric machine is preferably electrically connected to the second electric machine.
  • the first electric machine can also serve as a generator for charging a battery.
  • the first electric machine can serve as a drive motor/traction motor, in particular for boosting in the serial hybrid mode.
  • the hybrid transmission can also have a separating clutch, which connects the first torque drive train to the output shaft in a first switching state in a torque-transmitting manner and separates it from the output shaft in a torque-transmitting manner in a second switching state, so that the second electric machine is only coupled to the internal combustion engine in a first switching state the separating clutch is possible.
  • a particularly simple construction of the hybrid transmission can be achieved.
  • This has the advantage that, depending on the switching position of the separating clutch, which is usually located between the internal combustion engine and the drive axle/output shaft or between the first electric machine and the second electric machine, serial driving/serial hybrid mode occurs in the open state and parallel driving in the closed state driving/the parallel hybrid mode is enabled. This makes it easy to switch between serial and parallel hybrid mode.
  • the hybrid transmission can have a torsional vibration damper which is arranged on the input shaft on the same axial side of the transmission as the internal combustion engine.
  • the input shaft has two input shaft sections which can be rotated relative to one another and which are connected to one another via the torsional vibration damper.
  • One of the input shaft sections can be connected to the internal combustion engine and the other of the input shaft sections can be connected or is connected to the first electric machine without translation.
  • the hybrid transmission can have at least one second gear stage, preferably (at least or exactly) the second gear stage and a third gear stage, via which the second electric machine is connected to the output shaft. This has the advantage that the torque and the speed of the second torque drive train can be translated in a suitable manner.
  • the hybrid transmission can have a first translation stage, via which the input shaft is (directly) connected to the first electric machine.
  • the hybrid transmission can have a differential, which in the torque flow between the first torque drive train and the second torque drive train on the one hand and the output shaft on the other hand is arranged.
  • the torque of the torque drive strands can be transmitted to the output shaft or to two output shafts.
  • the object of the invention is also achieved by a drive train for a hybrid vehicle.
  • the drive train has a hybrid transmission according to the invention and an internal combustion engine, which is connected to the input shaft of the hybrid transmission in a torque-transmitting manner.
  • the torsional vibration damper can preferably be arranged axially between the internal combustion engine and the first electric machine (or the second electric machine).
  • the second electric machine can be arranged axially between the first electric machine and the internal combustion engine or the torsional vibration damper.
  • the invention relates to a 2-E machine hybrid transmission which enables serial driving or serial/parallel driving (i.e. switching between serial and parallel) and in which at least one axial flux machine is provided instead of a radial flux machine (which is otherwise commonly used).
  • both electric machines can also be designed as axial flow machines.
  • the axial flow machines can be arranged coaxially or axially parallel.
  • an electric machine especially the first electric machine
  • an electric machine especially the second electric machine
  • the high power density of the axial flow machine enables a more compact design compared to known hybrid transmissions, in which the axial lengths or outer diameters of the electric machines have to be increased as the torque increases.
  • Fig. 1 is a schematic representation of a hybrid transmission according to the invention and a drive train according to the invention with such a hybrid transmission.
  • the figure is only schematic in nature and is only used to understand the invention.
  • the same elements are provided with the same reference numbers.
  • the hybrid transmission 1 shows a flybridge transmission 1 according to the invention for a hybrid vehicle.
  • the hybrid transmission 1 has a first torque drive train, which has an input shaft 3 that can be connected to an internal combustion engine 2 and a first electric machine 4 that can be connected or is connected to the input shaft 3 in a torque-transmitting manner.
  • the hybrid transmission 1 has a second torque drive train, which has a second electric machine 5 that is different from the first electric machine 4 .
  • the hybrid transmission 1 has an output shaft 6 which can be or is connected via a transmission 7 (not described in detail) to the first torque drive train and/or to the second torque drive train in a torque-transmitting manner.
  • At least one of the first electric machine 4 and the second electric machine 5 is designed as an axial flow machine.
  • the magnetic flux in axial flux machines runs parallel to the axis of rotation.
  • both the first electric machine 4 and the second electric machine 5 are each designed as an axial flow machine.
  • only the first electric machine 4 can be configured as an axial flux machine and the second electric machine 5 can be configured as a radial flux machine, or only the second electric machine 5 can be configured as an axial flux machine and the first electric machine 4 can be configured as a radial flux machine, even if this is not shown .
  • the hybrid transmission 1 can have a separating clutch, not shown, in the transmission 7 .
  • the disconnect clutch torque-transmittingly/mechanically connects the first torque drive train to the output shaft 6 in a first shift state/in a closed state and disconnects the first torque drive train in a second shift state/in a nem open state torque-transmitting / mechanically from the output shaft 6.
  • the clutch can be arranged in the torque flow between the internal combustion engine and the output shaft 6 or between the first electric machine 4 and the second electric machine 5. Depending on the switching position of the separating clutch, it is thus possible to switch between a serial hybrid mode, in which the internal combustion engine 2 is mechanically decoupled, and a parallel hybrid mode.
  • first electric machine 4 and the second electric machine 5 can be arranged coaxially.
  • first electric machine 4 and the second electric machine 5 can be arranged axially parallel, even if this is not shown.
  • Rotors 8 of the first electric machine 4 can preferably be mounted in a torque-proof manner on a first rotor shaft 9 .
  • Rotors 10 of the second electric machine 5 can preferably be attached in a torque-proof manner on a second rotor shaft 11 .
  • a stator 17 of the first electric machine 4 is preferably located axially between the rotors 8 of the first electric machine 4.
  • a stator 18 of the second electric machine 5 is preferably located axially between the rotors 10 of the second electric machine 5.
  • one of the first rotor shaft 9 and the second rotor shaft 11 may be designed as a hollow shaft in which the other of the first rotor shaft 9 and the second rotor shaft 11 is rotatably mounted.
  • the second rotor shaft 11 is formed as the hollow shaft in which the first rotor shaft 9 is rotatably mounted. Both rotor shafts 9 and 11 pass through the respective electric machines 4 and 5 in each case axially completely, so that bearing points for the rotor shafts 9,11 can be provided on both sides of the electric machines 4.5.
  • the bearing point of the first rotor shaft 9 axially facing the transmission 7 lies within the second rotor shaft 11 and is not shown.
  • the first electric machine 4 and the second electric machine 5 can be arranged axially adjacent.
  • the first The electric machine 4 is arranged on an axial side of the second electric machine 5 that faces away from the transmission 7 .
  • the first electric machine 4 can function essentially as a generator.
  • the second electric machine 5 can function essentially as a drive motor.
  • the first electric machine 4 is preferably used as a generator to supply the second electric machine 5 with electricity. This means that the first electric machine 4 is preferably electrically connected to the second electric machine 5 .
  • the first electric machine 4 can serve as a generator for charging an accumulator/battery (for the second electric machine 5).
  • the first electric machine 4 can serve as a drive motor/traction motor.
  • the hybrid transmission 1 can have a torsional vibration damper 12 which is arranged on the input shaft 3 .
  • the input shaft 3 has two input shaft sections 13 , 14 which can be rotated relative to one another and which are connected to one another via the torsional vibration damper 12 .
  • a first input shaft section 13 can be connected to the internal combustion engine 2 and a second input shaft section 14 can be connected or connected to the first electric machine 4 .
  • the hybrid transmission 1 (precisely or at least) can have a first transmission stage in the transmission 7, via which the input shaft 3 is (directly) connected to the first electric machine 4. This means that the first transmission stage connects the input shaft 3 and the first rotor shaft 9 in a torque-transmitting/mechanical manner.
  • the hybrid transmission 1 can have at least one second transmission stage, preferably (exactly or at least) two transmission stages, ie the second transmission stage and a third transmission stage, in the transmission 7, via which the second electric machine is connected to the output shaft 6 .
  • the hybrid transmission 1 can have a differential 15 which is arranged in the torque flow between the first torque drive train and the second torque drive train on the one hand and the output shaft 6 on the other hand.
  • the differential transfers the torque from the transmission 7 to the output shaft 6 or the two output shafts 6.
  • the invention also relates to a drive train 16 for a hybrid vehicle, which has the hybrid transmission 1 and the internal combustion engine 2 that can be or is connected to the input shaft 3 of the hybrid transmission 1 in a torque-transmitting manner.
  • the torsional vibration damper 12 can preferably be arranged axially between the internal combustion engine 2 and the first electric machine 4 or the second electric machine 5 .
  • the second electric machine 5 can be arranged axially between the first electric machine 4 and the internal combustion engine 2 or the torsional vibration damper 12 .

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Abstract

The invention relates to a hybrid transmission (1) for a hybrid vehicle, comprising a first torque drive train that includes an input shaft (3) connectable to an internal combustion engine (2) as well as a first electric machine (4) torque-transmittingly connected to the input shaft (3), further comprising a second torque drive train that includes a second electric machine (5), and comprising an output shaft (6) that can be or is torque-transmittingly connected to the first torque drive train and/or the second torque drive train, at least one of the first electric machine (4) and the second electric machine (5) being an axial flux machine. The invention further relates to a drive train (16) for a hybrid vehicle, comprising such a hybrid transmission (1) and an internal combustion engine (2) that is torque-transmittingly connected to the input shaft (3) of the hybrid transmission (1).

Description

Hvbridqetriebe sowie Antriebsstranq mit Hvbridqetriebe Hybrid transmission and drive train with hybrid transmission
Die Erfindung betrifft ein Hybridgetriebe für ein Hybridfahrzeug, mit einem ersten Drehmomentantriebsstrang, der eine mit einer Verbrennungskraftmaschine verbindba re Eingangswelle und eine mit der Eingangswelle drehmomentübertragend verbindba re oder verbundene erste Elektromaschine/elektrische Maschine/E-Maschine auf weist, einem zweiten Drehmomentantriebsstrang, der eine zur ersten Elektromaschine unterschiedliche zweite Elektromaschine/elektrische Maschine/E-Maschine aufweist, einer Abtriebswelle/Antriebsachse, die mit dem ersten Drehmomentantriebsstrang und/oder mit dem zweiten Drehmomentantriebsstrang drehmomentübertragend ver bindbar oder verbunden ist, wobei die erste Elektromaschine und die zweite Elektro maschine koaxial angeordnet sind. Zudem betrifft die Erfindung einen Antriebsstrang mit einem solchen Hybridgetriebe. The invention relates to a hybrid transmission for a hybrid vehicle, with a first torque drive train, which has an input shaft that can be connected to an internal combustion engine and a first electric machine/electrical machine/e-machine that can be connected or connected to the input shaft in a torque-transmitting manner, a second torque drive train that has a has a different second electric machine/electrical machine/e-machine than the first electric machine, an output shaft/drive axle which can be connected or connected in a torque-transmitting manner to the first torque drive train and/or to the second torque drive train, the first electric machine and the second electric machine being arranged coaxially are. In addition, the invention relates to a drive train with such a hybrid transmission.
Aus dem Stand der Technik sind bereits solche Hybridgetriebe mit zwei Elektroma- schinen und einer Verbrennungskraftmaschine bekannt. Zum Beispiel offenbart die WO 2019/242 798 A1 eine Antriebseinheit für einen Antriebsstrang eines elektrisch antreibbaren Kraftfahrzeugs, insbesondere eines Hybridkraftfahrzeuges, mit einer ers ten elektrischen Maschine sowie einer zweiten elektrischen Maschine und einer ersten Welle sowie einer Ausgangswelle, wobei ein Rotor der ersten elektrischen Maschine drehfest mit der ersten Welle verbunden ist und ein Rotor der zweiten elektrischen Maschine drehfest mit der Ausgangswelle verbunden ist und wobei die Antriebseinheit weiterhin eine Trennkupplung aufweist, mit der der Rotor der ersten elektrischen Ma schine zur Drehmomentübertragung mit der Ausgangswelle verbindbar oder verbun den ist, wobei die Antriebseinheit weiterhin ein Anschlusselement zum Anschluss ei ner Verbrennungskraftmaschine aufweist, wobei die erste elektrische Maschine im Generatorbetrieb betreibbar ist und die Benennungsdrehzahl n1 der ersten elektri schen Maschine zur Benennungsdrehzahl n2 der zweite elektrischen Maschine in dem Verhältnis n1 > 1 ,2 x n2 steht. Auch aus den Patentanmeldungen US 2016/0218584 A1 , DE 11 2015 006 071 T5 und WO 2019/101 264 A1 sind verschiedene Getriebestrukturen eines solchen Hyb ridgetriebes bekannt. Such hybrid transmissions with two electric machines and one internal combustion engine are already known from the prior art. For example, WO 2019/242 798 A1 discloses a drive unit for a drive train of an electrically drivable motor vehicle, in particular a hybrid motor vehicle, with a first electric machine and a second electric machine and a first shaft and an output shaft, with a rotor of the first electric machine is non-rotatably connected to the first shaft and a rotor of the second electric machine is non-rotatably connected to the output shaft and the drive unit also has a separating clutch with which the rotor of the first electric machine can be connected or connected to the output shaft for torque transmission, wherein the drive unit also has a connection element for connecting an internal combustion engine, the first electrical machine being operable in generator mode and the rated speed n1 of the first electrical machine for the rated speed n2 of the second electrical M machine is in the ratio n1 > 1.2 x n2. Various transmission structures of such a hybrid transmission are also known from patent applications US 2016/0218584 A1, DE 11 2015 006 071 T5 and WO 2019/101 264 A1.
Solche Hybridgetriebe werden auch als dedizierte Hybridgetriebe („Dedicated Hybrid Transmissions“ (DHT)) bezeichnet. Bei diesen wird der mechanische Getriebeteil ver einfacht, etwa durch Entfall des Rückwärtsgangs, und stattdessen mindestens eine in das Getriebe integrierte elektrische Maschine genutzt, um den vollen Funktionsum fang darzustellen. Dedizierte Hybridgetriebe können aus bekannten Getriebekonzep ten hervorgehen, also aus Doppelkupplungsgetrieben, Wandler-Planetengetrieben, stufenlosen Getrieben (CVT) oder automatisierten Schaltgetrieben. Die elektrische Maschine wird dabei ein Teil des Getriebes, wobei ihre Anbindung auf verschiedenen Getriebewellen erfolgen kann. Neben den parallelen und/oder seriellen Hybridmodi können in Kombination mit einem Planetengetriebe auch ein oder mehrere leistungs verzweigte Betriebszustände erzeugt werden. Such hybrid transmissions are also referred to as dedicated hybrid transmissions (DHT). In these, the mechanical part of the transmission is simplified, for example by eliminating the reverse gear, and instead at least one electric machine integrated in the transmission is used to provide the full range of functions. Dedicated hybrid transmissions can be derived from known transmission concepts, i.e. double clutch transmissions, torque converter planetary transmissions, continuously variable transmissions (CVT) or automated manual transmissions. The electrical machine becomes part of the transmission, and it can be connected to different transmission shafts. In addition to the parallel and/or serial hybrid modes, one or more power-split operating states can also be generated in combination with a planetary gear.
Unter einem seriellen Hybridmodus wird dabei verstanden, dass die Verbrennungs kraftmaschine keine mechanische/drehmomentübertragende Verbindung zu der An triebsachse/Abtriebswelle mehr besitzt. Die Verbrennungskraftmaschine treibt die ers te, hauptsächlich als Generator fungierende Elektromaschine ein, die wiederum die hauptsächliche als Fahrmotor/Antriebsmotor fungierende zweite Elektromaschine mit Strom versorgt oder einen Akku auflädt. Die Antriebsachse wird durch die zweite Elektromaschine angetrieben. Unter einem parallelen Hybridmodus wird dabei ver standen, dass die Verbrennungskraftmaschine eine mechani sche/drehmomentübertragende Verbindung zu der Antriebsachse/Abtriebswelle be sitzt. Die zweite Elektromaschine kann leer mitlaufen, boosten oder rekuperieren. A serial hybrid mode is understood to mean that the internal combustion engine no longer has a mechanical/torque-transmitting connection to the drive axle/output shaft. The internal combustion engine drives the first electric machine, which mainly functions as a generator, which in turn supplies the second electric machine, which mainly functions as a traction motor/drive motor, with electricity or charges a battery. The drive axle is driven by the second electric machine. A parallel hybrid mode is understood to mean that the internal combustion engine has a mechanical/torque-transmitting connection to the drive axle/output shaft. The second electric machine can run idle, boost or recuperate.
Der Stand der Technik hat jedoch immer den Nachteil, dass bei den bisher bekannten Hybridgetriebekonzepten Radialflussmaschinen als Elektromaschine eingesetzt wer den, deren Axiallänge und/oder Außendurchmesser bei zunehmenden Drehmomen ten vergrößert werden müssen. Dies hat wiederum den Nachteil, dass die Hybridge- triebe einen großen Bauraumbedarf haben, wenn sie hohe Drehmomente ermögli chen. However, the prior art always has the disadvantage that in the previously known hybrid transmission concepts, radial flux machines are used as electric machines, the axial length and/or outer diameter of which must be increased with increasing torques. This in turn has the disadvantage that the hybrid drives require a large amount of space if they enable high torques.
Es ist also die Aufgabe der Erfindung, die Nachteile aus dem Stand der Technik zu vermeiden oder wenigstens zu mildern. Insbesondere soll ein Hybridgetriebe sowie ein Antriebsstrang mit einem Hybridgetriebe bereitgestellt werden, das auch bei hohen Drehmomenten und ohne Einschränkung der Funktionalität möglichst bauraumspa rend aufgebaut ist. It is therefore the object of the invention to avoid or at least alleviate the disadvantages of the prior art. In particular, a hybrid transmission and a drive train with a hybrid transmission are to be provided, which are designed to save as much space as possible even at high torques and without restricting functionality.
Die Aufgabe wird durch ein Hybridgetriebe mit den Merkmalen des Patentanspruchs 1 gelöst. The task is solved by a hybrid transmission with the features of patent claim 1 .
Insbesondere wird diese Aufgabe bei einer gattungsgemäßen Vorrichtung erfindungs gemäß dadurch gelöst, dass Rotoren der ersten Elektromaschine auf einer ersten Ro torwelle drehfest angebracht sind, Rotoren der zweiten Elektromaschine auf einer zweiten Rotorwelle drehfest angebracht sind, und die zweite Rotorwelle als eine Hohlwelle ausgebildet ist, in der die erste Rotorwelle drehbar gelagert ist. Durch die Lagerung der beiden Rotorwellen ineinander kann eine besonders bauraumeffiziente Anordnung bereitgestellt werden. Die zweite Rotorwelle kann selber eine Hohlwelle sein, um beispielsweise Kühlmittel oder Bremsflüssigkeit innerhalb der Rotorwelle zu transportieren. Die zweite Rotorwelle kann aber auch als Vollwelle radial innerhalb der Hohlwelle ausgebildet sein. dass wenigstens eine der ersten Elektromaschine und der zweiten Elektromaschine als eine Axialflussmaschine ausgebildet ist. Im Gegensatz zu Radialflussmaschinen verläuft der magnetische Fluss bei Axialflussmaschinen parallel zu der Rotationsach se. In particular, this object is achieved in a generic device according to the invention in that rotors of the first electric machine are attached to a first rotor shaft in a torque-proof manner, rotors of the second electric machine are attached to a second rotor shaft in a torque-proof manner, and the second rotor shaft is designed as a hollow shaft, in which is rotatably mounted the first rotor shaft. By mounting the two rotor shafts in one another, a particularly space-efficient arrangement can be provided. The second rotor shaft can itself be a hollow shaft in order, for example, to transport coolant or brake fluid within the rotor shaft. However, the second rotor shaft can also be designed as a solid shaft radially inside the hollow shaft. that at least one of the first electric machine and the second electric machine is designed as an axial flow machine. In contrast to radial flux machines, the magnetic flux in axial flux machines runs parallel to the axis of rotation.
Dies hat den Vorteil, dass Axialflussmaschinen im Gegensatz zu Radialflussmaschi nen ein geringeres Gewicht und/oder eine höhere Effizienz haben. Durch die hohe Leistungsdichte der Axialflussmaschine wird ein kompakterer Aufbau des gesamten Hybridgetriebes ermöglicht. Axialflussmaschinen, die auch als Scheibenläufermaschi nen bezeichnet werden, sind beispielsweise aus der DE 10 2019 122 314 A1 bekannt. This has the advantage that axial flow machines, in contrast to radial flow machines, are lighter and/or more efficient. Due to the high power density of the axial flow machine, a more compact construction of the whole is possible Hybrid transmission allows. Axial flow machines, which are also referred to as disc rotor machines, are known, for example, from DE 10 2019 122 314 A1.
Vorteilhafte Ausführungsformen sind in den Unteransprüchen beansprucht und wer den nachfolgend näher erläutert. Advantageous embodiments are claimed in the dependent claims and who explained in more detail below.
Gemäß einer bevorzugten Ausführungsform können die erste Elektromaschine und die zweite Elektromaschine jeweils als eine Axialflussmaschine ausgebildet sein. So mit kann die Leistungsdichte gegenüber bekannten Hybridgetrieben weiter gesteigert werden. According to a preferred embodiment, the first electric machine and the second electric machine can each be designed as an axial flow machine. In this way, the power density can be further increased compared to known hybrid transmissions.
Gemäß einer alternativen bevorzugten Ausführungsform kann die eine der ersten Elektromaschine und der zweiten Elektromaschine als eine Axialflussmaschine aus gebildet sein und die andere der ersten Elektromaschine und der zweiten Elektroma schine kann als eine Radialflussmaschine ausgebildet sein. Beispielsweise kann die zweite Elektromaschine als Axialflussmaschine ausgebildet sein, so dass insbesonde re im seriellen Hybridmodus hohe Drehmomente an der Abtriebswelle bereitgestellt werden können. Alternativ kann die erste Elektromaschine als Axialflussmaschine ausgebildet sein, so dass beispielsweise ein Boosten im parallelen Hybridmodus be sonders leistungsstark ist. According to an alternative preferred embodiment, one of the first electric machine and the second electric machine can be designed as an axial flux machine and the other of the first electric machine and the second electric machine can be designed as a radial flux machine. For example, the second electric machine can be designed as an axial flow machine, so that high torques can be provided at the output shaft, particularly in the serial hybrid mode. Alternatively, the first electric machine can be designed as an axial flow machine, so that, for example, boosting in the parallel hybrid mode is particularly powerful.
Gemäß einer bevorzugten Ausführungsform kann die erste Rotorwelle die erste Elekt romaschine axial durchgreifen. Alternativ oder zusätzlich kann auch die zweite Rotor welle die zweite Elektromaschine axial durchgreifen. Besonders bevorzugt ist hierbei vorgesehen, dass beide Rotorwelle die jeweilige Elektromaschine axial durchgreifen, d.h. axial beidseitig der jeweiligen Rotoren der entsprechenden Elektromaschine vor handen sind. Hierdurch könne günstiger Weise entsprechende axiale Angriffspunkte an den Rotorwellen erreicht werden. According to a preferred embodiment, the first rotor shaft can reach through the first electric machine axially. Alternatively or additionally, the second rotor shaft can reach through the second electric machine axially. Provision is particularly preferably made here for both rotor shafts to reach through the respective electric machine axially, i.e. to be present axially on both sides of the respective rotors of the corresponding electric machine. In this way, corresponding axial points of application on the rotor shafts can be achieved in a favorable manner.
In einer besonders günstigen Weiterentwicklung kann dann vorgesehen sein, dass die erste Rotorwelle axial außerhalb und axial beidseitig der ersten Elektromaschine, bzw. ihrer Rotoren gelagert ist. Alternativ oder zusätzlich kann weiter vorgesehen sein, dass dass die zweite Rotorwelle axial außerhalb und axial beidseitig der zweiten Elektromaschine, bzw. ihrer Rotoren gelagert ist. Besonders bevorzugt ist vorgese hen, dass beide Rotorwellen jeweils axial beidseitg ihrer Elektromaschinen, bzw. derer Rotoren beispielsweise gehäusefest gelagert sind. In a particularly favorable further development, provision can then be made for the first rotor shaft to be positioned axially outside and axially on both sides of the first electric machine or their rotors is mounted. Alternatively or additionally, it can further be provided that the second rotor shaft is mounted axially outside and axially on both sides of the second electric machine or its rotors. Provision is particularly preferably made for the two rotor shafts to be mounted axially on both sides of their electric machines or their rotors, for example fixed to the housing.
Gemäß einer bevorzugten Weiterbildung der Ausführungsform können die erste Elekt romaschine und die zweite Elektromaschine axial benachbart angeordnet sein. Dadurch lässt sich die Versorgung der zweiten Elektromaschine mit Strom, der durch die erste Elektromaschine erzeugt wurde, besonders einfach sicherstellen. According to a preferred development of the embodiment, the first electric machine and the second electric machine can be arranged axially adjacent. This makes it particularly easy to ensure that the second electric machine is supplied with electricity that was generated by the first electric machine.
Gemäß einer alternativen bevorzugten Ausführungsform können die erste Elektroma schine und die zweite Elektromaschine beide auf derselben axialen Seite eines Ge triebes, vorzugsweise auf der, der Verbrennungskraftmaschine gegenüberliegenden Seite des Getriebes angeordnet sind. Dies kann ein bauraumgünstige Geometrie dar stellen, auch können hier die Versorgungsleitungen besonders günstig innerhalb des Getriebes gelegt werden. According to an alternative preferred embodiment, the first electric machine and the second electric machine can both be arranged on the same axial side of a transmission, preferably on the side of the transmission opposite the internal combustion engine. This can represent a geometry that is favorable in terms of installation space, and the supply lines can also be laid particularly favorably within the transmission.
Gemäß einer bevorzugten Ausführungsform kann die erste Elektromaschine mit der Verbrennungskraftmaschine gekoppelt oder koppelbar sein und von dieser im We sentlichen als Generator betrieben werden und die zweite Elektromaschine kann im Wesentlichen als ein Antriebsmotor fungieren. Vorzugsweise dient die erste Elektro maschine als Generator zum Versorgen der zweiten Elektromaschine mit Strom. Das heißt, dass die erste Elektromaschine vorzugsweise mit der zweiten Elektromaschine elektrisch verbunden ist. Auch kann die erste Elektromaschine als ein Generator zum Aufladen eines Akkus dienen. Zusätzlich kann die erste Elektromaschine als ein An triebsmotor/Fahrmotor, insbesondere zum Boosten im seriellen Hybridmodus dienen. Das Hybridgetriebe kann weiter eine Trennkupplung aufweisen, die den ersten Dreh momentantriebsstrang in einem ersten Schaltzustand mit der Abtriebswelle drehmo mentübertragend verbindet und in einem zweiten Schaltzustand von der Abtriebswelle drehmomentübertragend trennt, so dass eine Kopplung der zweiten Elektromaschine mit der Verbrennungskraftmaschine ausschließlich bei einem ersten Schaltzustand der Trennkupplung möglich ist. Hierdurch kann eine besonders einfacher Aufbau des Hybridgetriebes erreicht werden. Dies hat den Vorteil, dass je nach Schaltstellung der Trennkupplung, die sich üblicherweise zwischen der Verbrennungskraftmaschine und der Antriebsachse/Abtriebswelle oder zwischen der ersten Elektromaschine und der zweiten Elektromaschine befindet, im offenen Zustand das serielle Fahren/der serielle Hybridmodus und im geschlossenen Zustand das parallele Fahren/der parallele Hyb ridmodus ermöglicht wird. So kann einfach zwischen dem seriellen und dem parallelen Hybridmodus umgeschaltet werden. According to a preferred embodiment, the first electric machine can be coupled or can be coupled to the internal combustion engine and essentially operated by it as a generator, and the second electric machine can essentially function as a drive motor. The first electric machine preferably serves as a generator for supplying the second electric machine with electricity. This means that the first electric machine is preferably electrically connected to the second electric machine. The first electric machine can also serve as a generator for charging a battery. In addition, the first electric machine can serve as a drive motor/traction motor, in particular for boosting in the serial hybrid mode. The hybrid transmission can also have a separating clutch, which connects the first torque drive train to the output shaft in a first switching state in a torque-transmitting manner and separates it from the output shaft in a torque-transmitting manner in a second switching state, so that the second electric machine is only coupled to the internal combustion engine in a first switching state the separating clutch is possible. As a result, a particularly simple construction of the hybrid transmission can be achieved. This has the advantage that, depending on the switching position of the separating clutch, which is usually located between the internal combustion engine and the drive axle/output shaft or between the first electric machine and the second electric machine, serial driving/serial hybrid mode occurs in the open state and parallel driving in the closed state driving/the parallel hybrid mode is enabled. This makes it easy to switch between serial and parallel hybrid mode.
Gemäß einer bevorzugten Ausführungsform kann das Hybridgetriebe einen Torsions schwingungsdämpfer aufweisen, der auf der Eingangswelle auf derselben axialen Sei te des Getriebes wie die Verbrennungskraftmaschine angeordnet ist. Das heißt, dass die Eingangswelle zwei relativ zueinander drehbare Eingangswellenabschnitte auf weist, die über den Torsionsschwingungsdämpfer miteinander verbunden sind. Dabei ist einer der Eingangswellenabschnitte mit der Verbrennungskraftmaschine verbindbar und der andere der Eingangswellenabschnitte übersetzungslos mit der ersten Elekt romaschine verbindbar oder verbunden. Das Hybridgetriebe kann mindestens eine zweite Übersetzungsstufe aufweisen, vorzugsweise (mindestens oder genau) die zweite Übersetzungsstufe und eine dritte Übersetzungsstufe, über welche die zweite Elektromaschine mit der Abtriebswelle verbunden ist. Dies hat den Vorteil, dass das Drehmoment und die Drehzahl des zweiten Drehmomentantriebsstrangs in geeigneter Weise übersetzt werden können. According to a preferred embodiment, the hybrid transmission can have a torsional vibration damper which is arranged on the input shaft on the same axial side of the transmission as the internal combustion engine. This means that the input shaft has two input shaft sections which can be rotated relative to one another and which are connected to one another via the torsional vibration damper. One of the input shaft sections can be connected to the internal combustion engine and the other of the input shaft sections can be connected or is connected to the first electric machine without translation. The hybrid transmission can have at least one second gear stage, preferably (at least or exactly) the second gear stage and a third gear stage, via which the second electric machine is connected to the output shaft. This has the advantage that the torque and the speed of the second torque drive train can be translated in a suitable manner.
Gemäß einer alternativen Ausführungsform kann das Hybridgetriebe eine erste Über setzungsstufe aufweisen, über welche die Eingangswelle (direkt) mit der ersten Elekt romaschine verbunden ist. Dies hat den Vorteil, dass das Drehmoment und die Dreh zahl des ersten Drehmomentantriebsstrangs in geeigneter Weise übersetzt werden können. According to an alternative embodiment, the hybrid transmission can have a first translation stage, via which the input shaft is (directly) connected to the first electric machine. This has the advantage that the torque and the speed of the first torque drive train can be translated in a suitable manner.
Gemäß einer bevorzugten Ausführungsform kann das Hybridgetriebe ein Differenzial aufweisen, das im Drehmomentfluss zwischen dem ersten Drehmomentantriebsstrang und den zweiten Drehmomentantriebsstrang einerseits und der Abtriebswelle ande- rerseits angeordnet ist. Dadurch kann das Drehmoment der Drehmomentantriebs stränge auf die Abtriebswelle bzw. auf zwei Abtriebswellen übertragen. According to a preferred embodiment, the hybrid transmission can have a differential, which in the torque flow between the first torque drive train and the second torque drive train on the one hand and the output shaft on the other hand is arranged. As a result, the torque of the torque drive strands can be transmitted to the output shaft or to two output shafts.
Die Aufgabe der Erfindung wird auch durch einen Antriebsstrang für ein Hybridfahr zeug gelöst. Der Antriebsstrang weist ein erfindungsgemäßes Hybridgetriebe und eine Verbrennungskraftmaschine auf, die mit der Eingangswelle des Hybridgetriebes drehmomentübertragend verbunden ist. Vorzugsweise kann der Torsionsschwin gungsdämpfer axial zwischen der Verbrennungskraftmaschine und der ersten Elekt- romaschine (bzw. der zweiten Elektromaschine) angeordnet sein. Zusätzlich kann die zweite Elektromaschine axial zwischen der ersten Elektromaschine und der Verbren nungskraftmaschine bzw. dem Torsionsschwingungsdämpfer angeordnet sein. The object of the invention is also achieved by a drive train for a hybrid vehicle. The drive train has a hybrid transmission according to the invention and an internal combustion engine, which is connected to the input shaft of the hybrid transmission in a torque-transmitting manner. The torsional vibration damper can preferably be arranged axially between the internal combustion engine and the first electric machine (or the second electric machine). In addition, the second electric machine can be arranged axially between the first electric machine and the internal combustion engine or the torsional vibration damper.
Mit anderen Worten betrifft die Erfindung ein 2-E-Maschinen-Hybridgetriebe, welches serielles Fahren bzw. serielles/paralleles Fahren (d.h. eine Umschaltung zwischen se riell und parallel) ermöglicht und bei dem mindestens eine Axialflussmaschine anstelle einer (sonst üblicherweise verwendeten) Radialflussmaschine vorgesehen ist. Vor zugsweise können auch beide Elektromaschinen als Axialflussmaschinen ausgebildet sein. Dabei können die Axialflussmaschinen koaxial oder achsparallel angeordnet sein. In dem Hybridgetriebe fungiert eine Elektromaschine (insbesondere die erste Elektromaschine) hauptsächlich als Generator und eine Elektromaschine (insbeson dere die zweite Elektromaschine) hauptsächlich als Fahrmotor. Durch die hohe Leis tungsdichte der Axialflussmaschine wird ein kompakterer Aufbau im Vergleich zu be kannten Hybridgetrieben ermöglicht, bei denen mit zunehmenden Drehmomenten die Axiallängen oder Außendurchmesser der Elektromaschinen vergrößert werden müs sen. In other words, the invention relates to a 2-E machine hybrid transmission which enables serial driving or serial/parallel driving (i.e. switching between serial and parallel) and in which at least one axial flux machine is provided instead of a radial flux machine (which is otherwise commonly used). is. Preferably, both electric machines can also be designed as axial flow machines. The axial flow machines can be arranged coaxially or axially parallel. In the hybrid transmission, an electric machine (especially the first electric machine) mainly functions as a generator and an electric machine (especially the second electric machine) mainly functions as a traction motor. The high power density of the axial flow machine enables a more compact design compared to known hybrid transmissions, in which the axial lengths or outer diameters of the electric machines have to be increased as the torque increases.
Die Erfindung wird nachfolgend mit Hilfe einer Zeichnung erläutert. Es zeigt: The invention is explained below with the aid of a drawing. It shows:
Fig. 1 eine schematische Darstellung eines erfindungsgemäßen Hybridgetrie bes und eines erfindungsgemäßen Antriebsstrangs mit einem solchen Hybridgetriebe. Die Figur ist lediglich schematischer Natur und dient ausschließlich dem Verständnis der Erfindung. Die gleichen Elemente sind mit denselben Bezugszeichen versehen. Fig. 1 is a schematic representation of a hybrid transmission according to the invention and a drive train according to the invention with such a hybrid transmission. The figure is only schematic in nature and is only used to understand the invention. The same elements are provided with the same reference numbers.
Fig. 1 zeigt ein erfindungsgemäßes Flybridgetriebe 1 für ein Hybridfahrzeug. Das Hyb ridgetriebe 1 weist einen ersten Drehmomentantriebsstrang, der eine mit einer Ver brennungskraftmaschine 2 verbindbare Eingangswelle 3 und eine mit der Eingangs welle 3 drehmomentübertragend verbindbare oder verbundene erste Elektromaschine 4 aufweist. Das Hybridgetriebe 1 weist einen zweiten Drehmomentantriebsstrang auf, der eine zur ersten Elektromaschine 4 unterschiedliche zweite Elektromaschine 5 aufweist. Das Hybridgetriebe 1 weist eine Abtriebswelle 6 auf, die über ein nicht näher beschriebenes Getriebe 7 mit dem ersten Drehmomentantriebsstrang und/oder mit dem zweiten Drehmomentantriebsstrang drehmomentübertragend verbindbar oder verbunden ist. 1 shows a flybridge transmission 1 according to the invention for a hybrid vehicle. The hybrid transmission 1 has a first torque drive train, which has an input shaft 3 that can be connected to an internal combustion engine 2 and a first electric machine 4 that can be connected or is connected to the input shaft 3 in a torque-transmitting manner. The hybrid transmission 1 has a second torque drive train, which has a second electric machine 5 that is different from the first electric machine 4 . The hybrid transmission 1 has an output shaft 6 which can be or is connected via a transmission 7 (not described in detail) to the first torque drive train and/or to the second torque drive train in a torque-transmitting manner.
Erfindungsgemäß ist wenigstens eine der ersten Elektromaschine 4 und der zweiten Elektromaschine 5 als eine Axialflussmaschine ausgebildet. Im Gegensatz zu Radial flussmaschinen verläuft der magnetische Fluss bei Axialflussmaschinen parallel zu der Rotationsachse. In der dargestellten Ausführungsform sind sowohl die erste Elekt romaschine 4 als auch die zweite Elektromaschine 5 jeweils als eine Axialflussma schine ausgebildet. Alternativ kann auch nur die erste Elektromaschine 4 als eine Axi alflussmaschine und die zweite Elektromaschine 5 als eine Radialflussmaschine aus gebildet sein oder auch nur die zweite Elektromaschine 5 als eine Axialflussmaschine und die erste Elektromaschine 4 als eine Radialflussmaschine ausgebildet sein, auch wenn dies nicht dargestellt ist. According to the invention, at least one of the first electric machine 4 and the second electric machine 5 is designed as an axial flow machine. In contrast to radial flux machines, the magnetic flux in axial flux machines runs parallel to the axis of rotation. In the illustrated embodiment, both the first electric machine 4 and the second electric machine 5 are each designed as an axial flow machine. Alternatively, only the first electric machine 4 can be configured as an axial flux machine and the second electric machine 5 can be configured as a radial flux machine, or only the second electric machine 5 can be configured as an axial flux machine and the first electric machine 4 can be configured as a radial flux machine, even if this is not shown .
In einer bevorzugten Ausführungsform kann das Hybridgetriebe 1 eine nicht darge stellte Trennkupplung in dem Getriebe 7 aufweisen. Die Trennkupplung verbindet den ersten Drehmomentantriebsstrang in einem ersten Schaltzustand/in einem geschlos senen Zustand drehmomentübertragend/mechanisch mit der Abtriebswelle 6 und trennt den ersten Drehmomentantriebsstrang in einem zweiten Schaltzustand/in ei- nem geöffneten Zustand drehmomentübertragend/mechanisch von der Abtriebswelle 6. Die Trennkupplung kann im Drehmomentfluss zwischen der Verbrennungskraftma schine und der Abtriebswelle 6 oder zwischen der ersten Elektromaschine 4 und der zweiten Elektromaschine 5 angeordnet sein. Somit kann je nach Schaltstellung der Trennkupplung zwischen einem seriellen Hybridmodus, in dem die Verbrennungs kraftmaschine 2 mechanisch abgekoppelt ist, und einem parallelen Hybridmodus um geschaltet werden. In a preferred embodiment, the hybrid transmission 1 can have a separating clutch, not shown, in the transmission 7 . The disconnect clutch torque-transmittingly/mechanically connects the first torque drive train to the output shaft 6 in a first shift state/in a closed state and disconnects the first torque drive train in a second shift state/in a nem open state torque-transmitting / mechanically from the output shaft 6. The clutch can be arranged in the torque flow between the internal combustion engine and the output shaft 6 or between the first electric machine 4 and the second electric machine 5. Depending on the switching position of the separating clutch, it is thus possible to switch between a serial hybrid mode, in which the internal combustion engine 2 is mechanically decoupled, and a parallel hybrid mode.
In einer bevorzugten Ausführungsform können die erste Elektromaschine 4 und die zweite Elektromaschine 5 koaxial angeordnet sein. Alternativ können die erste Elekt romaschine 4 und die zweite Elektromaschine 5 achsparallel angeordnet sein, auch wenn dies nicht dargestellt ist. In a preferred embodiment, the first electric machine 4 and the second electric machine 5 can be arranged coaxially. Alternatively, the first electric machine 4 and the second electric machine 5 can be arranged axially parallel, even if this is not shown.
Vorzugsweise können Rotoren 8 der ersten Elektromaschine 4 auf einer ersten Ro torwelle 9 drehfest angebracht sein. Vorzugsweise können Rotoren 10 der zweiten Elektromaschine 5 auf einer zweiten Rotorwelle 11 drehfest angebracht sein. Axial zwischen den Rotoren 8 der ersten Elektromaschine 4 befindet sich vorzugsweise ein Stator 17 der ersten Elektromaschine 4. Axial zwischen den Rotoren 10 der zweiten Elektromaschine 5 befindet sich vorzugsweise ein Stator 18 der zweiten Elektroma schine 5. In einer bevorzugten Ausführungsform kann eine der ersten Rotorwelle 9 und der zweiten Rotorwelle 11 als eine Hohlwelle ausgebildet sein, in der die andere der ersten Rotorwelle 9 und der zweiten Rotorwelle 11 drehbar gelagert ist. In der dargestellten Ausführungsform ist die zweite Rotorwelle 11 als die Hohlwelle ausge bildet, in der die erste Rotorwelle 9 drehbar gelagert ist. Beide Rotorwellen 9 und 11 durchgreifen die jeweiligen Elektromaschinen 4 und 5 jeweils axial vollständig, so dass jeweils beidseitig der Elektromaschinen 4,5 Lagerstellen für die Rotorwellen 9,11 vorgesehen sein können. Die axial dem Getriebe 7 zugewandte Lagerstelle der ersten Rotorwelle 9 liegt dabei innerhalb der zweiten Rotorwelle 11 und ist nicht dargestellt. Rotors 8 of the first electric machine 4 can preferably be mounted in a torque-proof manner on a first rotor shaft 9 . Rotors 10 of the second electric machine 5 can preferably be attached in a torque-proof manner on a second rotor shaft 11 . A stator 17 of the first electric machine 4 is preferably located axially between the rotors 8 of the first electric machine 4. A stator 18 of the second electric machine 5 is preferably located axially between the rotors 10 of the second electric machine 5. In a preferred embodiment, one of the first rotor shaft 9 and the second rotor shaft 11 may be designed as a hollow shaft in which the other of the first rotor shaft 9 and the second rotor shaft 11 is rotatably mounted. In the illustrated embodiment, the second rotor shaft 11 is formed as the hollow shaft in which the first rotor shaft 9 is rotatably mounted. Both rotor shafts 9 and 11 pass through the respective electric machines 4 and 5 in each case axially completely, so that bearing points for the rotor shafts 9,11 can be provided on both sides of the electric machines 4.5. The bearing point of the first rotor shaft 9 axially facing the transmission 7 lies within the second rotor shaft 11 and is not shown.
Vorzugsweise können die erste Elektromaschine 4 und die zweite Elektromaschine 5 axial benachbart angeordnet sein. In der dargestellten Ausführungsform ist die erste Elektromaschine 4 auf einer dem Getriebe 7 abgewandten Axialseite der zweiten Elektromaschine 5 angeordnet. Preferably, the first electric machine 4 and the second electric machine 5 can be arranged axially adjacent. In the illustrated embodiment, the first The electric machine 4 is arranged on an axial side of the second electric machine 5 that faces away from the transmission 7 .
Insbesondere kann die erste Elektromaschine 4 im Wesentlichen als ein Generator fungieren. Die zweite Elektromaschine 5 kann im Wesentlichen als ein Antriebsmotor fungieren. Vorzugsweise dient die erste Elektromaschine 4 als Generator zum Ver sorgen der zweiten Elektromaschine 5 mit Strom. Das heißt, dass die erste Elektro maschine 4 vorzugsweise mit der zweiten Elektromaschine 5 elektrisch verbunden ist. Auch kann die erste Elektromaschine 4 als ein Generator zum Aufladen eines Ak kus/einer Batterie (für die zweite Elektromaschine 5) dienen. Zusätzlich kann die erste Elektromaschine 4 als ein Antriebsmotor/Fahrmotor dienen. In particular, the first electric machine 4 can function essentially as a generator. The second electric machine 5 can function essentially as a drive motor. The first electric machine 4 is preferably used as a generator to supply the second electric machine 5 with electricity. This means that the first electric machine 4 is preferably electrically connected to the second electric machine 5 . Also, the first electric machine 4 can serve as a generator for charging an accumulator/battery (for the second electric machine 5). In addition, the first electric machine 4 can serve as a drive motor/traction motor.
Darüber hinaus kann das Hybridgetriebe 1 einen Torsionsschwingungsdämpfer 12 aufweisen, der auf der Eingangswelle 3 angeordnet ist. Das heißt, dass die Ein gangswelle 3 zwei relativ zueinander drehbare Eingangswellenabschnitte 13, 14 auf weist, die über den Torsionsschwingungsdämpfer 12 miteinander verbunden sind. Dabei ist ein erster Eingangswellenabschnitt 13 mit der Verbrennungskraftmaschine 2 verbindbar und ein zweiter Eingangswellenabschnitt 14 mit der ersten Elektromaschi ne 4 verbindbar oder verbunden. In addition, the hybrid transmission 1 can have a torsional vibration damper 12 which is arranged on the input shaft 3 . This means that the input shaft 3 has two input shaft sections 13 , 14 which can be rotated relative to one another and which are connected to one another via the torsional vibration damper 12 . A first input shaft section 13 can be connected to the internal combustion engine 2 and a second input shaft section 14 can be connected or connected to the first electric machine 4 .
Zudem kann das Hybridgetriebe 1 (genau oder wenigstens) eine erste Übersetzungs stufe in dem Getriebe 7 aufweisen, über welche die Eingangswelle 3 (direkt) mit der ersten Elektromaschine 4 verbunden ist. Das heißt, dass die erste Übersetzungsstufe die Eingangswelle 3 und die erste Rotorwelle 9 drehmomentübertragend/mechanisch verbindet. Alternativ oder zusätzlich kann das Hybridgetriebe 1 wenigstens eine zwei te Übersetzungsstufe, vorzugsweise (genau oder wenigstens) zwei Übersetzungsstu fen, d.h. die zweite Übersetzungsstufe und eine dritte Übersetzungsstufe, in dem Ge triebe 7 aufweisen, über welche die zweite Elektromaschine mit der Abtriebswelle 6 verbunden ist. In einer bevorzugten Ausführungsform kann das Hybridgetriebe 1 ein Differenzial 15 aufweisen, das im Drehmomentfluss zwischen dem ersten Drehmomentantriebsstrang und den zweiten Drehmomentantriebsstrang einerseits und der Abtriebswelle 6 ande rerseits angeordnet ist. In der dargestellten Ausführungsform überträgt das Differenzi- al das Drehmoment von dem Getriebe 7 an die Abtriebswelle 6 bzw. die beiden Ab triebswellen 6. In addition, the hybrid transmission 1 (precisely or at least) can have a first transmission stage in the transmission 7, via which the input shaft 3 is (directly) connected to the first electric machine 4. This means that the first transmission stage connects the input shaft 3 and the first rotor shaft 9 in a torque-transmitting/mechanical manner. Alternatively or additionally, the hybrid transmission 1 can have at least one second transmission stage, preferably (exactly or at least) two transmission stages, ie the second transmission stage and a third transmission stage, in the transmission 7, via which the second electric machine is connected to the output shaft 6 . In a preferred embodiment, the hybrid transmission 1 can have a differential 15 which is arranged in the torque flow between the first torque drive train and the second torque drive train on the one hand and the output shaft 6 on the other hand. In the illustrated embodiment, the differential transfers the torque from the transmission 7 to the output shaft 6 or the two output shafts 6.
Zudem betrifft die Erfindung einen Antriebsstrang 16 für ein Hybridfahrzeug, der das Hybridgetriebe 1 und die mit der Eingangswelle 3 des Hybridgetriebes 1 drehmomen- tübertragend verbindbare oder verbundene Verbrennungskraftmaschine 2 aufweist. Vorzugsweise kann der Torsionsschwingungsdämpfer 12 axial zwischen der Verbren nungskraftmaschine 2 und der ersten Elektromaschine 4 bzw. der zweiten Elektroma- schine 5 angeordnet sein. Zusätzlich kann die zweite Elektromaschine 5 axial zwi schen der ersten Elektromaschine 4 und der Verbrennungskraftmaschine 2 bzw. dem Torsionsschwingungsdämpfer 12 angeordnet sein. The invention also relates to a drive train 16 for a hybrid vehicle, which has the hybrid transmission 1 and the internal combustion engine 2 that can be or is connected to the input shaft 3 of the hybrid transmission 1 in a torque-transmitting manner. The torsional vibration damper 12 can preferably be arranged axially between the internal combustion engine 2 and the first electric machine 4 or the second electric machine 5 . In addition, the second electric machine 5 can be arranged axially between the first electric machine 4 and the internal combustion engine 2 or the torsional vibration damper 12 .
Bezuqszeichenliste Hybridgetriebe Verbrennungskraftmaschine Eingangswelle erste Elektromaschine zweite Elektromaschine Abtriebswelle Getriebe Rotor erste Rotorwelle Rotor zweite Rotorwelle Torsionsschwingungsdämpfer erster Eingangswellenabschnitt zweiter Eingangswellenabschnitt Differenzial Antriebsstrang Stator Stator List of reference symbols Hybrid transmission Internal combustion engine Input shaft First electric machine Second electric machine Output shaft Transmission Rotor First rotor shaft Rotor Second rotor shaft Torsional vibration damper First input shaft section Second input shaft section Differential Drive train Stator Stator

Claims

Patentansprüche patent claims
1. Hybridgetriebe (1 ) für ein Hybridfahrzeug, mit einem ersten Drehmomentan triebsstrang, der eine mit einer Verbrennungskraftmaschine (2) verbindbare Eingangswelle (3) und eine mit der Eingangswelle (3) drehmomentübertragend verbundene erste Elektromaschine (4) aufweist, einem zweiten Drehmoment antriebsstrang, der eine zweite Elektromaschine (5) aufweist, einer Abtriebswel le (6), die mit dem ersten Drehmomentantriebsstrang und/oder mit dem zweiten Drehmomentantriebsstrang drehmomentübertragend verbindbar oder verbun den ist, wobei wenigstens eine der ersten Elektromaschine (4) und der zweiten Elektromaschine (5) als eine Axialflussmaschine ausgebildet ist, und die erste Elektromaschine (4) und die zweite Elektromaschine (5) koaxial angeordnet sind, dadurch gekennzeichnet, dass Rotoren (8) der ersten Elektromaschine (4) auf einer ersten Rotorwelle (9) drehfest angebracht sind, Rotoren (10) der zwei ten Elektromaschine (5) auf einer zweiten Rotorwelle (11 ) drehfest angebracht sind, und die zweite Rotorwelle (11) als eine Hohlwelle ausgebildet ist, in der die erste Rotorwelle (9) drehbar gelagert ist. 1. Hybrid transmission (1) for a hybrid vehicle, with a first torque drive train, which has an input shaft (3) that can be connected to an internal combustion engine (2) and a first electric machine (4) that is connected to the input shaft (3) in a torque-transmitting manner, a second torque drive train , which has a second electric machine (5), an output shaft (6), which can be connected or connected in a torque-transmitting manner to the first torque drive train and/or to the second torque drive train, wherein at least one of the first electric machine (4) and the second electric machine ( 5) is designed as an axial flow machine, and the first electric machine (4) and the second electric machine (5) are arranged coaxially, characterized in that rotors (8) of the first electric machine (4) are non-rotatably mounted on a first rotor shaft (9). , Rotors (10) of the second electric machine (5) are mounted in a torque-proof manner on a second rotor shaft (11), and the second rotor shaft (11) is designed as a hollow shaft in which the first rotor shaft (9) is rotatably mounted.
2. Hybridgetriebe (1) nach Anspruch 1, dadurch gekennzeichnet, dass die erste Elektromaschine (4) und die zweite Elektromaschine (5) jeweils als eine Axial flussmaschine ausgebildet sind. 2. Hybrid transmission (1) according to claim 1, characterized in that the first electric machine (4) and the second electric machine (5) are each designed as an axial flow machine.
3. Hybridgetriebe (1) nach Anspruch 1, dadurch gekennzeichnet, dass die eine der ersten Elektromaschine (4) und der zweiten Elektromaschine (5) als eine Axialflussmaschine ausgebildet ist und die andere der ersten Elektromaschine (4) und der zweiten Elektromaschine (5) als eine Radialflussmaschine ausge bildet ist. 3. Hybrid transmission (1) according to claim 1, characterized in that one of the first electric machine (4) and the second electric machine (5) is designed as an axial flow machine and the other of the first electric machine (4) and the second electric machine (5) is formed out as a radial flux machine.
4. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die erste Rotorwelle (9) die erste Elektromaschine (4) und/oder die zweite Rotorwelle (11) die zweite Elektromaschine (5) axial durchgreift. 4. Hybrid transmission (1) according to any one of claims 1 to 3, characterized in that the first rotor shaft (9), the first electric machine (4) and / or the second Rotor shaft (11) passes through the second electric machine (5) axially.
5. Hybridgetriebe (1 ) nach Anspruch 4, dadurch gekennzeichnet, dass die erste Rotorwelle (9) axial außerhalb und axial beidseitig der ersten Elektromaschine (4) und/oder die zweite Rotorwelle (11) axial außerhalb und axial beidseitig der zweiten Elektromaschine (5) gelagert ist. 5. Hybrid transmission (1) according to claim 4, characterized in that the first rotor shaft (9) is axially outside and axially on both sides of the first electric machine (4) and/or the second rotor shaft (11) is axially outside and axially on both sides of the second electric machine (5 ) is stored.
6. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die erste Elektromaschine (4) und die zweite Elektromaschine (5) beide auf derselben axialen Seite eines Getriebes (7), vorzugsweise auf der, der Ver brennungskraftmaschine (2) gegenüberliegenden Seite des Getriebes (7) an geordnet sind. 6. Hybrid transmission (1) according to any one of claims 1 to 5, characterized in that the first electric machine (4) and the second electric machine (5) both on the same axial side of a transmission (7), preferably on the internal combustion engine Ver ( 2) are arranged on the opposite side of the gearbox (7).
7. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die erste Elektromaschine (4) mit der Verbrennungskraftmaschine (2) ge koppelt oder koppelbar ist und von dieser im Wesentlichen als Generator be trieben ist und die zweite Elektromaschine (5) im Wesentlichen als ein An triebsmotor fungiert, wobei das Hybridgetriebe (1) weiter eine Trennkupplung aufweist, die den ersten Drehmomentantriebsstrang in einem ersten Schaltzu stand mit der Abtriebswelle (6) drehmomentübertragend verbindet und in einem zweiten Schaltzustand von der Abtriebswelle (6) drehmomentübertragend trennt, so dass eine Kopplung der zweiten Elektromaschine (5) mit der Ver brennungskraftmaschine (2) ausschließlich bei einem ersten Schaltzustand der Trennkupplung möglich ist. 7. Hybrid transmission (1) according to one of claims 1 to 6, characterized in that the first electric machine (4) with the internal combustion engine (2) ge couples or can be coupled and is driven by this essentially as a generator and the second electric machine ( 5) essentially functions as a drive motor, with the hybrid transmission (1) further having a disconnect clutch which, in a first switching state, torque-transmittingly connects the first torque drive train to the output shaft (6) and, in a second switching state, torque-transmitting from the output shaft (6). separates, so that a coupling of the second electric machine (5) with the United internal combustion engine (2) is only possible in a first switching state of the separating clutch.
8. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Hybridgetriebe (1) einen Torsionsschwingungsdämpfer (12), der auf der Eingangswelle (3) auf derselben axialen Seite des Getriebes (7) wie die Verbrennungskraftmaschine (2) angeordnet ist umfasst, die Eingangswelle (3) übersetzungslos mit der ersten Elektromaschine (4) verbunden, und die zweite Elektromaschine (5) über eine zweite Übersetzungsstufe mit der Abtriebswelle (6) verbunden ist. 8. Hybrid transmission (1) according to one of Claims 1 to 7, characterized in that the hybrid transmission (1) has a torsional vibration damper (12) which is mounted on the input shaft (3) on the same axial side of the transmission (7) as the internal combustion engine (2nd ) is arranged, the input shaft (3) is connected without translation to the first electric machine (4), and the second The electric machine (5) is connected to the output shaft (6) via a second transmission stage.
9. Antriebsstrang (16) für ein Hybridfahrzeug, mit einem Hybridgetriebe (1) nach einem der Ansprüche 1 bis 8, und einer Verbrennungskraftmaschine (2), die mit der Eingangswelle (3) des Hybridgetriebes (1) drehmomentübertragend ver bunden ist. 9. Drive train (16) for a hybrid vehicle, with a hybrid transmission (1) according to any one of claims 1 to 8, and an internal combustion engine (2) with the input shaft (3) of the hybrid transmission (1) is torque-transmitting a related party.
PCT/DE2022/100241 2021-05-03 2022-03-29 Hybrid transmission, and drive train having a hybrid transmission WO2022233356A1 (en)

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