WO2023110290A1 - Elektrisches antriebssystem für ein kraftfahrzeug mit zwei elektromotoren und schaltbarer torque-vectoring-funktion - Google Patents
Elektrisches antriebssystem für ein kraftfahrzeug mit zwei elektromotoren und schaltbarer torque-vectoring-funktion Download PDFInfo
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- WO2023110290A1 WO2023110290A1 PCT/EP2022/082500 EP2022082500W WO2023110290A1 WO 2023110290 A1 WO2023110290 A1 WO 2023110290A1 EP 2022082500 W EP2022082500 W EP 2022082500W WO 2023110290 A1 WO2023110290 A1 WO 2023110290A1
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- shaft
- planetary gear
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- differential
- planetary
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of differential gearing provided between independent half axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
- F16H37/0806—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
- F16H2048/364—Differential gearings characterised by intentionally generating speed difference between outputs using electric or hydraulic motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
- F16H2048/368—Differential gearings characterised by intentionally generating speed difference between outputs using additional orbital gears in combination with clutches or brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/201—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with three sets of orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2035—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with two engaging means
Definitions
- the invention relates to an electric drive system for a motor vehicle with two electric motors and a switchable torque vectoring function according to the preamble of patent claim 1.
- US 2015/0 065 282 A1 discloses a drive machine for driving two rotating shafts as known.
- An electric drive system with an electric machine and a planetary gear is known from KR 10 2019 069 157 A.
- the object of the present invention is to create an electric drive system for a motor vehicle so that particularly advantageous drivability and also high energy efficiency can be achieved.
- the invention relates to an electric drive system, also referred to as an electric drive device or designed as an electric drive device, for a motor vehicle, in particular for a motor vehicle.
- the motor vehicle has the electric drive system in its completely manufactured state and can be driven electrically, in particular purely electrically, by means of the electric drive system.
- the motor vehicle For example, in its fully manufactured state, it has at least or exactly two axles, which are arranged one after the other in the longitudinal direction of the vehicle and are therefore arranged one behind the other.
- the respective axle has, for example, at least or exactly two wheels, also referred to as vehicle wheels, with the wheels of the respective axle preferably being arranged on opposite sides in the vehicle transverse direction.
- the wheels are ground contact elements via which the motor vehicle can be or is supported on a ground in the vehicle vertical direction downwards.
- the electric drive system is assigned to at least one of the axles or precisely to one of the axles, so that, for example, the wheels can be driven at least or precisely to one of the axles by means of the electric drive system.
- the wheels that can be driven by the electric drive system are also referred to as drive wheels. If the drive wheels and thus the motor vehicle are driven by the electric drive system, while the motor vehicle is supported on the ground via the wheels in the vehicle vertical direction, the motor vehicle is driven along the ground and the wheels roll off the ground.
- the electric drive system has a first electric machine with a first rotor.
- the first electrical machine has a first stator, by means of which the first rotor can be driven and thereby rotated about a first machine axis of rotation relative to the first stator.
- the electric drive system also has a second electric machine, which has a second rotor.
- the second electrical machine has a second stator, by means of which the second rotor can be driven and thereby rotated about a second machine axis of rotation relative to the second stator.
- the electrical machines are preferably arranged coaxially to one another, the machine axes of rotation coincide.
- the electric drive system also has at least or exactly one planetary gear, which has a first planetary gear set, a second planetary gear set, a first input shaft, a second input shaft, a first output shaft and a second output shaft.
- the first input shaft is designed to introduce first torques emanating from the first electrical machine, in particular from the first rotor, into the planetary gear.
- This can in particular be understood to mean that the first electric machine, in particular via its first rotor, can provide the first torques, which can be introduced into the planetary gear via the first input shaft. In this way, the planetary gear in particular can be driven.
- the second input shaft is designed to to introduce second torques emanating from the second electric machine, in particular from the second rotor, into the planetary gear.
- the second electric machine in particular via its second rotor, can provide the second torques, which can be introduced into the planetary gear via the second input shaft, in particular bypassing the first input shaft.
- the planetary gear can be driven.
- the first torques are introduced into the planetary gear via the first input shaft, bypassing the second input shaft.
- the second electrical machine and the second torques that can be made available or made available by the second electric machine, in particular by the second rotor, do not run or flow, for example, on their way from the second electric machine, in particular from the second rotor, into the planetary gear via the first input shaft, and therefore bypass the second torques the first input shaft, so that, for example, the first input shaft related to a second torque transmission path, via which the second torque provided by the second electric machine, in particular by the second rotor, from the second electric machine, in particular from the second rotor, to the second input shaft can be transmitted and introduced into the planetary gear via the second input shaft, is not arranged in the second torque transmission path or at least not in the second torque transmission path between the second electric machine and the planetary gear.
- the first planetary gear set has a first sum shaft, a first differential shaft and a second differential shaft.
- the first sum shaft, the first differential shaft and the second differential shaft are thus, for example, first transmission elements of the first planetary gear set.
- the second planetary gear set has a second sum shaft, a third differential shaft and a fourth differential shaft.
- the second sum shaft, the third differential shaft and the fourth differential shaft are second transmission elements of the second planetary gear set.
- the respective planetary gear set is also referred to as a planetary gear set.
- Summation shaft and differential shafts of a planetary gear set are characterized in that torques of the summation shaft and torques of one of the differential shafts have different signs, with torques of one differential shaft having the same sign as torques of the other differential shaft.
- the second input shaft is, in particular permanently, non-rotatably connected to the first differential shaft.
- the first output shaft is, in particular permanently, non-rotatably connected to the first sum shaft.
- the second output shaft is, in particular permanently, non-rotatably connected to the second differential shaft.
- the feature that two elements such as the second input shaft and the first differential shaft are connected to one another in a rotationally fixed manner means that the two elements are arranged coaxially with one another and are connected to one another in such a way that they are, in particular, a common element axis of rotation and/or relative to a housing element of the drive system, rotate at the same angular velocity, in particular when the elements or one of the elements and one element are or is driving the other element.
- the term or expression of a non-rotatable connection between two rotatably mounted elements means that the two elements are arranged coaxially to one another and are connected to one another in such a way that they rotate at the same angular velocity.
- the feature that two elements are permanently connected in a rotationally fixed manner means that these elements are not assigned a switching element which switches between a coupled state in which the elements are rotationally fixedly connected to one another and a decoupled state is switchable, in which the switching element allows a relative rotation between the elements taking place in particular around the aforementioned element axis of rotation, but the elements are always or always, that is to say permanently, connected to one another in a rotationally test manner.
- the respective, first transmission element can, for example, rotate about a first planetary gear set axis of rotation of the first planetary gear set relative to the housing device, which, for example, contains the aforementioned housing element is to be rotated.
- the respective second gear element can be rotated about a second planetary gear set axis of rotation relative to the housing device, particularly when the respective second gear element is not rotationally connected to the housing device.
- the planetary gear sets are arranged coaxially with one another, the planetary gear set axes of rotation coincide.
- the planetary gear has a third planetary gear set, which has a third sum shaft, a fifth differential shaft and a sixth differential shaft.
- the previous and following statements can be transferred to the first planetary gear set and to the second planetary gear set and vice versa.
- the third sum shaft, the fifth differential shaft and the sixth differential shaft are third transmission elements of the third planetary gear set.
- first transmission elements of the first planetary gear set and on the second transmission elements of the second planetary gear set can also be easily transferred to the third transmission elements of the third planetary gear set and vice versa, so that, for example, if the respective third transmission element is not rotationally fixed with the housing device is connected, the respective, third transmission element is rotatable about a third planetary gear set axis of rotation relative to the housing device. If the third planetary gear set is arranged coaxially with the first planetary gear set and/or coaxially with the second planetary gear set, the third planetary gear set axis of rotation coincides with the first planetary gear set axis of rotation and/or with the third planetary gear set axis of rotation.
- the first input shaft in particular permanently, is non-rotatably connected to the third sum shaft connected is.
- the third differential shaft is connected, in particular permanently, in a torque-proof manner to the fifth differential shaft.
- the first output shaft is, in particular permanently, non-rotatably connected to the fourth differential shaft.
- a first switching element is provided, which is designed to connect the fourth differential shaft to the sixth differential shaft in a torque-proof manner.
- the fourth differential shaft can be connected to the sixth differential shaft as required or decoupled from the sixth differential shaft, so that particularly advantageous drivability can be achieved.
- the first switching element can be switched between a first coupling state and a first decoupling state.
- the fourth differential shaft is non-rotatably connected to the sixth differential shaft by means of the first switching element, so that, for example, the fourth differential shaft and the sixth differential shaft can be rotated together, in particular about the second or third planetary gear axis of rotation, relative to the housing device.
- the first shifting element allows relative rotations between the fourth differential shaft and the sixth differential shaft, in particular about the second or third planetary gear set axis of rotation.
- a second shifting element is also provided according to the invention, which is designed to connect the third differential shaft to the sixth differential shaft in a torque-proof manner.
- the second switching element can be switched over between a second coupling state and a second decoupling state.
- the third differential shaft is non-rotatably connected to the sixth differential shaft by means of the second switching element, so that, for example, the third differential shaft and the sixth differential shaft can be rotated together or simultaneously, in particular about the second or third planetary gear set axis of rotation, relative to the housing device.
- the second shifting element can be moved in particular around the second or third planetary gear set axis of rotation taking place relative rotations between the third differential shaft and the sixth differential shaft.
- the respective shifting element can be a form-locking shifting element, so that the respective shifting element can be designed, for example, as a form-locking clutch or a claw clutch. Furthermore, it is conceivable that the respective shifting element is a frictional shifting element, so that, for example, the respective shifting element is designed as a friction clutch or multi-plate clutch.
- the first switching element can be moved, in particular relative to the housing device, between at least one first coupling position causing the first coupling state and at least one first uncoupling position causing the first uncoupling state.
- the first switching element can be moved in rotation between the first coupling position and the first decoupling position.
- the second switching element can be moved, in particular relative to the housing device, between at least one second coupling position causing the second coupling state and at least one second uncoupling position causing the second uncoupling state.
- the second switching element can be moved in rotation or in translation between the second coupling position and the second decoupling position.
- the respective switching element can be understood as a component by means of which the fourth differential shaft can be connected in a rotationally fixed manner to the sixth differential shaft or the third differential shaft can be connected in a rotationally fixed manner to the sixth differential shaft.
- a first of the states is, for example, what is known as a torque vectoring state, which is also referred to as a torque distribution state.
- torque vectoring state torques can be distributed to the drive wheels in a particularly advantageous manner by means of the electric machines in order to achieve advantageous drivability.
- a second of the states is, for example, a so-called individual drive state, in which, for example, the drive wheels based on the electrical machines can be driven or are driven by only or exactly one of the electrical machines, while a The drive wheels are not driven by the other electric machine.
- one embodiment of the invention provides for the second differential shaft to be connected in a torque-proof manner to the second sum shaft, in particular permanently.
- the first differential shaft as a first sun gear
- the first sum shaft as a first planet carrier, which is also referred to as the first carrier
- the second Differential shaft is designed as a first ring gear
- ordinal numbers such as “first”, “first”, “second” and “second” etc., referred to as ordinals, do not necessarily indicate a number or quantity of parts to which the ordinal numbers refer, but rather im Rather, within the scope of the present disclosure, the ordinal number words are used in order to be able to use the ordinal number words to unambiguously refer to terms to which the ordinal number words relate.
- the third differential shaft is designed as a second sun gear
- the fourth differential shaft is designed as a second planet carrier, which is also referred to as a second carrier
- the second sum shaft is designed as a second ring gear.
- the first planetary carrier is designed as a single planetary carrier with first planetary gears.
- the first planet wheels are rotatably mounted on the first planet carrier, in particular such that the respective first planet wheel is rotatable about a respective first planet wheel axis of rotation relative to the first planet carrier.
- the first planetary wheel axes of rotation run parallel to one another and are spaced apart from one another.
- first planetary gear axes of rotation in particular around the first planetary gear set axis of rotation, first circumferential direction of the first planetary gear set in pairs evenly or equally spaced from each other.
- first planet gears are constructed identically to one another and are arranged at the same height in particular in the axial direction of the first planetary gear set, beginning in particular at the same, first height and ending at the same, second height, in particular in the axial direction Direction of the first planetary gear considered.
- the second planetary carrier is designed as a double planetary carrier with second planetary gears and third planetary gears.
- the second planet wheels and the third planet wheels are rotatably mounted on the second planet carrier, in particular in such a way that the respective second planet wheel can be rotated about a respective second planet wheel axis of rotation relative to the second planet carrier, and that the respective third planetary gear is rotatable about a respective third planetary gear axis of rotation relative to the second planetary carrier.
- the second planetary gear axes of rotation run parallel to one another and are spaced apart from one another, in particular in the second circumferential direction of the second planetary gear set, which runs in particular around the second planetary gear set axis of rotation, it being particularly conceivable that the second planetary gear set axes of rotation run in pairs in the second circumferential direction of the second planetary gear set are evenly or equally spaced from each other. It is also conceivable that the third planetary gear axes of rotation run parallel to one another and are spaced apart from one another, in particular in the second circumferential direction of the second planetary gear set.
- the third planetary gear axes of rotation are spaced apart from one another in pairs in the second circumferential direction of the second planetary gear set.
- the second planet gears can be structurally identical. It is also conceivable that the third planet gears are structurally identical.
- the third planetary gear rotation axes run parallel to the second planetary gear rotation axes.
- the second planet gears are arranged at the same height in the axial direction of the second planetary gear set, and consequently the second planet gears begin and end at the same heights as viewed in the axial direction of the second planetary gear set.
- the third planet gears are arranged at the same height in the axial direction of the second planetary gear set, so that preferably the third planet gears are in the axial direction of the second planetary gear considered at respective, same levels begin and end.
- the second planet gears are structurally identical, ie identical in terms of their construction.
- the third planet gears can be of the same construction, that is to say they can be identical in terms of their construction.
- the respective, second planetary gear and the respective, third planetary gear differ from one another in terms of their construction.
- the respective, second planetary gear and the respective, third planetary gear viewed in the axial direction of the second planetary gear set, are arranged at the same or different heights, i.e. start at the same height or at a different height and/or on the end at the same level or at a different level.
- the first planetary gears are formed separately from the second planetary gears and separately from the third planetary gears.
- the second planet gears mesh with the second sun gear, it being conceivable that the respective second planet gear meshes with one of the third planet gears and not with the second ring gear.
- the third planetary gears are in mesh with the second ring gear, it being conceivable that the respective third planetary gear is in mesh with none of the second planetary gears and not with the second sun gear.
- a simple planetary gear set with a single planetary carrier that is, for example, when the respective planetary carrier is designed as a single planetary carrier, the planetary carrier or a carrier shaft that is non-rotatably connected to the planetary carrier, in particular permanently, is the sum shaft, so that the ring gear and the sun gear are the differential shafts.
- a planetary gear set with a double planetary carrier would be kinematically equivalent to this, i.e. if the planetary carrier is designed as a double planetary carrier:
- the ring gear is the sum shaft, with the planetary carrier, i.e. the double planetary carrier, and the sun gear being the differential shafts.
- a single planetary carrier can be replaced by a double planetary carrier if, in particular, the carrier and ring gear connections are exchanged at the same time and vice versa, in particular in the sense of kinematic equivalence.
- a further embodiment is characterized in that the fifth differential shaft is designed as a third sun gear, the third sum shaft as a third planet carrier and the sixth differential shaft as a third ring gear.
- the invention can implement an active and needs-based transmission of torque, so that the total torque, also referred to as total torque, of both electrical machines can be transmitted in particular to a wheel axle or to one of the drive wheels.
- total torque also referred to as total torque
- a position of a torque ratio is achieved without additional actuators and only using the two electrical machines.
- a further embodiment is characterized in that the planetary gear, the first rotor and the second rotor are all arranged coaxially with one another, so that, for example, the planetary gear set axes of rotation, the first machine axis of rotation and the second machine axis of rotation all coincide. In this way, a compact design and advantageous drivability can be implemented.
- the first planetary gear set is designed for a stationary transmission of -1.6.
- the first planetary gear set has a stationary transmission of ⁇ 1.6.
- the second planetary gear set is designed for a stationary transmission of -2.6, and therefore has a stationary transmission of +2.6.
- the third planetary gear set is designed for a stationary gear ratio of -4.2, and therefore has a stationary gear ratio of -4.2. As a result, a particularly compact design and particularly advantageous drivability can be achieved.
- the planetary gear is preferably designed as a planetary differential gear, in particular with a torque vectoring function.
- the torque vectoring function is also known as the torque distribution function.
- this can be understood to mean the following:
- the electric drive system and thus the planetary gear are, in particular precisely, one of the axles and thus the wheels of the assigned an axis, so that the drive wheels can be driven by the electric machine via the planetary gear.
- the planetary gear preferably functions or is designed as a planetary differential gear, the planetary gear allows, for example, when the motor vehicle is cornering, different speeds of the drive wheels, in particular such that the drive wheel on the outside of the curve rotates or can rotate at a higher speed than the drive wheel on the inside of the curve.
- a motor vehicle that is preferably designed as a motor vehicle, in particular the aforementioned motor vehicle, the motor vehicle having an electric drive system according to the invention.
- Advantages and advantageous configurations of the electric drive system are to be regarded as advantages and advantageous configurations of the motor vehicle and vice versa.
- the electric drive system can have a first transmission stage, which is also referred to as the first final drive.
- the first transmission stage Based on a first torque flow, along which the third torques can be diverted from the planetary gear via the first output shaft, the first transmission stage is, for example, in the first torque flow and is arranged downstream of the first output shaft, and is therefore connected downstream or downstream of the first output shaft.
- the first output shaft is in the first torque flow and is arranged upstream of the first transmission stage.
- the electric drive system has a second transmission stage, which is also referred to as the second final drive.
- the second transmission stage is in the second torque flow and is arranged downstream of the second output shaft.
- the second transmission stage is arranged in the second torque flow and is connected downstream of the second output shaft.
- the second output shaft is connected downstream.
- the second output shaft is arranged in the second torque flow and is arranged upstream of the second transmission stage.
- the housing can be the aforementioned housing element and/or the aforementioned housing device.
- the respective transmission stage has, for example, at least or exactly two respective gears, which can be designed in particular as spur gears.
- the respective gears of the respective transmission stage are in, in particular direct, engagement with one another, so that, for example, the respective gears of the respective transmission stage form a respective spur gear stage or spur gear pair.
- the planetary gear, the two rotors and the two transmission stages are arranged coaxially with one another. Provision is preferably made for the planetary gear sets to be arranged coaxially with one another, so that the planetary gear set axes of rotation coincide.
- a coaxial arrangement of the rotors, that is to say that the rotors are preferably arranged coaxially with one another, can in particular be understood to mean that the machine axes of rotation coincide.
- the rotors are arranged coaxially to one another and coaxially to the planetary gear sets and thus coaxially to the planetary gear, the machine axes of rotation coincide, the planetary gear set axes of rotation coincide and the respective planetary gear set axis of rotation coincides with the respective machine axis of rotation.
- the respective transmission stage has at least one transmission element, which can be designed, for example, as a gear, in particular as a spur gear.
- the respective transmission element of the respective transmission stage can be rotated relative to the housing, in particular about a transmission element axis of rotation.
- the transmission elements are the transmission stages are arranged coaxially with one another, so that the translation element axes of rotation coincide. If, for example, the transmission stages are arranged coaxially to one another, coaxially to the planetary gear and coaxially to the rotors, the planetary gear set rotational axes, the machine rotational axes and the transmission element rotational axes all coincide, which means that a particularly space-saving design can be achieved.
- the respective transmission stage is designed as a respective, further planetary gear set.
- the first transmission stage is designed as a fourth planetary gear set and the second transmission stage as a fifth planetary gear set, with the fourth planetary gear set being provided in addition to the first, second, third and fifth planetary gear sets.
- the respective, aforementioned transmission element of the respective transmission step is a respective sun gear or a respective ring gear or a respective planet carrier of the respective fourth or fifth planetary gear set.
- a respective input of the respective, further planetary gear set, and therefore of the respective transmission stage is a respective, further sun gear of the respective, further planetary gear set.
- the third torques derived from the planetary gear via the first output shaft and in particular provided by the first output shaft can be introduced via the input, and therefore via the sun gear, of the first gear ratio stage, which is designed as the fourth planetary gear set, into the first gear ratio stage.
- the fourth torques derived from the planetary gear via the second output shaft and in particular provided by the second output shaft can be introduced via the input, and therefore via the sun gear, of the second gear ratio stage designed as the fifth planetary gear set into the second gear ratio stage.
- the respective additional planetary carrier of the respective additional planetary gear set, and therefore of the respective transmission stage is a respective output or output of the respective transmission stage.
- the first transmission stage designed as the fourth planetary gear set, can provide fifth torques via its additional planetary carrier, thus deriving or dissipating fifth torques from itself, with the fifth torques resulting, for example, from the third torques, which, in particular via the additional sun gear of the first translation stage, are or were introduced into the first translation stage.
- the second gear stage designed as the fifth planetary gear set
- the respective additional ring gear of the respective transmission stage designed as the fourth or fifth planetary gear set is fixed to the housing, and is therefore, in particular permanently, non-rotatably connected to the housing, the housing being, for example, the housing element and/or the housing facility is.
- FIG. 1 shows a schematic representation of an electric drive system in a first state
- FIG. 2 shows a schematic representation of the electric drive system in a second state.
- the motor vehicle has the electric drive system 10, by means of which the motor vehicle can be driven, in particular purely electrically.
- the motor vehicle has at least or exactly two axles arranged one after the other in the longitudinal direction of the vehicle and thus one behind the other.
- the respective axle has at least or exactly two wheels, also referred to as vehicle wheels, with the respective wheels of the respective axle being arranged on opposite sides of the motor vehicle in the vehicle transverse direction.
- the drive system 10 is assigned to at least or precisely one of the axles, so that the electric drive system 10 can be used to drive at least or only the wheels of the axle to which the electric drive system 10 is assigned.
- the wheels that can be driven by the electric drive system 10 are also referred to as drive wheels.
- the drive wheels are shown particularly schematically in FIG. 1 and are denoted by 12 and 14 .
- the motor vehicle By driving the drive wheels 12 and 14 electrically, in particular purely, by means of the drive system 10, the motor vehicle can be driven, in particular purely electrically.
- the drive system 10 has a first electric machine 16 which has a first stator 18 and a first rotor 20 .
- the rotor 20 can be driven by the stator 18 and thereby rotated about a first machine axis of rotation relative to the stator 18 .
- the drive system 10 has a housing 22 shown particularly schematically in FIG. 1, which is also referred to as a housing device or housing element.
- the rotor 20 is rotatable about the first machine axis of rotation relative to the stator 18 and relative to the housing 22 .
- the drive system 10 also includes a second electric machine 24 which has a second stator 26 and a second rotor 28 .
- the rotor 28 can be driven by the stator 26 and thereby rotated about a second machine axis of rotation relative to the stator 26 and relative to the housing 22 .
- the electrical machines 16 and 24 and thus their rotors 20 and 28 are preferably arranged coaxially to one another, even if this should be shown differently in FIG. 1 for reasons of space. Since the electrical machines 16 and 24 and thus their rotors 20 and 28 are preferably arranged coaxially to one another, the machine axes of rotation coincide.
- the electric machine 16 can provide first torques via its rotor 20 , which are illustrated by an arrow 21 .
- the second electric machine 24 can provide second torques via its second rotor 28 , which are illustrated by an arrow 29 in FIG. 1 .
- the drive system 10 has a planetary gear 30 which has a first planetary gear set 32 and a second planetary gear set 34 .
- the planetary gear sets 32 and 34 are also referred to simply as planetary sets.
- the planetary gear 30 has a first input shaft 36 and a second input shaft 38 .
- the planetary gear 30 has a first output shaft 40 and a second output shaft 42 .
- the first input shaft 36 is designed to transmit the output from the first electrical machine 16, i.e. from the electrical machine 16 via the rotor 20 and thus from the rotor 20 provided to initiate first torques in the planetary gear 30.
- the second input shaft 38 is designed to introduce the second torques emanating from the second electrical machine 24 , ie the second torques provided by the electrical machine 24 via the rotor 28 and thus by the rotor 28 , into the planetary gear 30 .
- First output shaft 40 is designed to derive from planetary gear 30 third torques that result, for example, from the first torques and/or second torques introduced into planetary gear 30 , the third torques being represented by an arrow 41 in FIG. 1 .
- Second output shaft 42 is designed to derive fourth torques from planetary gear 30, which result, for example, from the first torques and/or second torques introduced into planetary gear 30, the fourth torques being represented by an arrow 43 in FIG .
- the first planetary gear set 32 has a first sum shaft S1, a first differential shaft D1 and a second differential shaft D2.
- the second planetary gear set 34 has a second sum shaft S2, a third differential shaft D3 and a fourth differential shaft D4.
- the second input shaft 38 is, in particular permanently, non-rotatably connected to the first differential shaft D1.
- the first output shaft 40 is, in particular permanently, non-rotatably connected to the first sum shaft S1.
- the first output shaft 40 is, in particular permanently, non-rotatably connected to the fourth differential shaft D4.
- the second output shaft 42 is, in particular permanently, non-rotatably connected to the second differential shaft D2.
- the second output shaft 42 is, in particular permanently, non-rotatably connected to the second sum shaft S2, so that in the embodiment shown in Fig. 1 the second difference shaft D2 with the second sum shaft S2 , In particular permanently, is rotatably connected.
- the planetary gear 30 has a third planetary gearset 44, which is also referred to as the third planetary gearset.
- the third planetary gear set 44 has a third sum shaft S3, a fifth differential shaft D5 and a sixth differential shaft D6.
- the first input shaft 36 is, in particular permanently, non-rotatably connected to the third sum shaft S3.
- the third differential shaft D3 is, in particular permanently, non-rotatably connected to the fifth differential shaft D5.
- the input shaft 36 in particular permanently, rotationally connected to the rotor 20.
- the input shaft 38 is connected to the rotor 28 in a rotationally fixed manner, in particular permanently.
- the electric drive system 10, in particular the planetary gear 30, has a first switching element SE1, which is designed to rotationally connect the fourth differential shaft D4 to the sixth differential shaft D6. Furthermore, the electric drive system 10, in particular the planetary gear 30, has a second shifting element SE2, which is designed to rotationally connect the third differential shaft D3 and thus the fifth differential shaft D5 in the exemplary embodiment shown in FIG. 1 to the sixth differential shaft D6 .
- first state of the electric drive system 10 in particular of the planetary gear 30, the first state being a first switching state, for example.
- the switching element SE1 is closed, while the switching element SE2 is open, so that in the first state the fourth differential shaft D4 is non-rotatably connected to the sixth differential shaft D6 by means of the first switching element SE1, while the third differential shaft D3 is not non-rotatably connected to the sixth Differential shaft D6 is connected, so that, for example, the third differential shaft D3 and the sixth differential shaft D6 can rotate relative to one another, in particular about a first planetary gear set axis of rotation of planetary gear set 32 and/or about a second planetary gear set axis of rotation of second planetary gear set 34 and/or about a third planetary gear set axis of rotation of third Planetary gear set 44.
- the planetary gear sets 32, 34 and 44 are arranged coaxially with one another, so that the said planetary gear set axes of rotation coincide.
- the planetary gear sets 32, 34 and 44 and thus the planetary gear 30 are arranged coaxially with the rotors 20 and 28 so that the planetary gear rotational axes coincide and so that the planetary gear rotational axes coincide with the machine rotational axes, which also coincide.
- the second state is also referred to as the second switching state.
- the switching element SE1 is open, while the second switching element SE2 is closed.
- the third differential shaft D3 and the sixth differential shaft D6 are connected to one another in a torque-proof manner by means of the second switching element SE2, while the fourth differential shaft D4 and the sixth differential shaft D6 are not connected to one another in a rotationally fixed manner, but can rotate relative to one another about the respective planetary gear axis of rotation.
- the first differential shaft D1 is designed as a first sun gear of the first planetary gear set 32 .
- the first sum shaft S1 is designed as a first planet carrier of the first planetary gear set 32, the first planet carrier also being referred to as the first carrier.
- the second differential shaft D2 is designed as a first ring gear of the first planetary gear set 32 .
- the fourth differential shaft D4 is designed as a second planet carrier of the second planetary gear set 34, the second planet carrier also being referred to as the second carrier.
- the second sum shaft S2 is designed as a second ring gear of the second planetary gear set 34 .
- the first planetary carrier is designed as a single planetary carrier with first planetary gears 46 .
- the respective first planet gear 46 is rotatably mounted on the first planet carrier, the respective first planet gear 46 meshing, in particular simultaneously, with the first sun gear and with the first ring gear.
- the second planetary carrier is designed, for example, as a double planetary carrier with second planetary gears 48 and third planetary gears 50, the second planetary gears 48 and the third planetary gears 50 preferably being rotatably mounted on the second planetary carrier, and therefore on the double planetary carrier. It is conceivable that, for example, the second planet gears 48 mesh with the second sun gear, but not mesh with the second ring gear and also not mesh with the third planet gears 50, it being conceivable that the third planet gears 50 mesh with the second ring gear, but not in mesh with the second sun gear and not in mesh with the second planet gears 48 are.
- the second sun gear meshes with the second planetary gears 48, and the third planetary gears 50 mesh with the second ring gear, with, for example, the planetary gears 48 and 50 meshing with one another or the planetary gears 48 and 50 not meshing with one another.
- the second planetary gears 48 do not mesh with the second ring gear
- the third planetary gears 50 do not mesh with the second sun gear.
- the first planetary gears 46 are formed separately from the second planetary gears 48 and separately from the third planetary gears 50 .
- the fifth differential shaft D5 is designed as a third sun gear of the third planetary gear set 44 .
- the third sum shaft S3 is designed as a third planetary carrier of the third planetary gearset 44
- the sixth differential shaft D6 is designed as a third ring gear of the third planetary gearset 44
- the third planetary carrier is preferably designed as a single planetary carrier with fourth planetary gears 52, which are rotatably mounted on the third planetary carrier. It is preferably provided that the respective, third planet gear 52, in particular at the same time, meshes with the third ring gear and with the third sun gear of the third planetary gear set 44, and is therefore in engagement.
- the respective output shaft 40 or 42 is also referred to as the output shaft.
- the respective drive wheel 12 or 14 can be driven by the respective output shaft, that is to say by the output shaft 40 or 42, respectively.
- Electric drive system 10 preferably has a first transmission stage, not shown in the figures, which is in the first torque flow and is downstream in relation to a first torque flow, along which the third torques can be dissipated from planetary gear 30 via first output shaft 40 the first output shaft 40 is arranged.
- a first side shaft (not shown in the figures) is arranged, which is arranged in the first torque flow and thereby downstream of the first transmission stage.
- the first side shaft can be driven by the first output shaft 40 via the first transmission stage, it being possible for the drive wheel 12 to be driven by the first side shaft and thus by the first transmission stage via the first side shaft.
- the drive system 10 can also have a second transmission stage, not shown in the figures, which, based on a second torque flow, along which the fourth torques can be dissipated from the planetary gear 30 via the second output shaft 42, in the second torque flow and thereby downstream of the second output shaft 42 is arranged.
- a second side shaft is arranged in the second torque flow downstream of the second transmission stage, with the drive wheel 14 being able to be driven by the second transmission stage via the second side shaft.
- the second side shaft can be driven by the second output shaft 42 via the second gear ratio.
- the first side shaft can be driven by the output shaft 40 via the first gear ratio.
- the respective translation stage is also referred to as a final drive (FD).
- the first transmission stage is preferably a fourth planetary gear set, it being conceivable for the second transmission stage to be a fifth planetary gear set.
- the fourth planetary gear set and the fifth planetary gear set are structurally identical, ie identical or the same in terms of their construction and thus in particular in terms of their translation.
- the transmission stages, the planetary gear sets 32, 34 and 44 and the rotors 20 and 28 are arranged coaxially with one another. Furthermore, it is preferably provided that the transmission stages are arranged in the housing 22 . It is therefore very preferably provided that the planetary gear sets 32, 34 and 44 and the rotors 20 and 28 and also the transmission stages are arranged in the common housing 22.
- a pure differential operation can be implemented, for example, with the switching element SE1 being closed and the switching element SE2 being open.
- the first electric machine 16 feeds in the respective first torque, in particular the planetary gear 30, via the third planetary gear set 44 and ultimately via the second sun gear and the second planetary carrier, with the electric machine 24 rotating, so to speak, idle here, for example.
- the first planetary gear set 32 is also not involved here, so to speak, since the first sun gear in particular rotates idle. Via the first output shaft, i.e.
- the respective third torque in particular as half of the first torque generated or provided by the electric machine 16 goes to one of the drive wheels 12 and 14, in particular to the drive wheel 12, and via the second output shaft, consequently via the second output shaft 42 and thus via the first ring gear, the fourth torque is applied in particular as the other half of the first torque provided by the electric machine 16 and introduced in particular into the planetary gear 30 the other of the drive wheels 12 and 14, in particular to the drive wheel 14.
- active torque vectoring ie an active torque distribution function
- switching element SE1 being open and switching element SE2 being closed.
- the third planetary gear set 44 is blocked because by means of the Switching element SE2, the third ring gear is connected to the third sun gear.
- the electric machine 16 feeds its entire, respective, first torque to the second sun gear or via the second sun gear, in particular into the planetary gear 30 .
- the electric machine 24 feeds its respective, second torque to the first sun wheel or via the first sun wheel, in particular into the planetary gear 30 .
- the third planetary gear set 44 is used so that, starting with a simple transmission and in particular the planetary gear 30, only two shifting elements, namely the shifting elements SE1 and SE2, are required to, in addition to the second state, i.e. in addition to the active Torque vectoring, also to be able to realize the first state and thus the pure differential operation, wherein the pure differential operation is also referred to as one-EM driving operation, in which or in which a half division, i.e. a 50:50 division, of the in the planetary gear 30 fed, in particular first, torque can be realized or realized.
- the same effect could also be realized without the third planetary gear set 44, but four or five shifting elements would then be needed in order to achieve a large number of shaft shifts in order to realize single-EM driving operation.
- the electric drive system 10 saves components and thus weight, costs and installation space, while at the same time a particularly advantageous drivability can be achieved.
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202280080469.3A CN118355212A (zh) | 2021-12-13 | 2022-11-18 | 具有两个电动机和可切换的扭矩矢量化功能的机动车用电驱动系统 |
| US18/718,954 US12247650B1 (en) | 2021-12-13 | 2022-11-18 | Electric drive system for a motor vehicle with two electric motors and a switchable torque vectoring function |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021006118.7 | 2021-12-13 | ||
| DE102021006118.7A DE102021006118B3 (de) | 2021-12-13 | 2021-12-13 | Elektrisches Antriebssystem für ein Kraftfahrzeug mit zwei Elektromotoren und schaltbarer Torque- Vectoring-Funktion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023110290A1 true WO2023110290A1 (de) | 2023-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/082500 Ceased WO2023110290A1 (de) | 2021-12-13 | 2022-11-18 | Elektrisches antriebssystem für ein kraftfahrzeug mit zwei elektromotoren und schaltbarer torque-vectoring-funktion |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12247650B1 (de) |
| CN (1) | CN118355212A (de) |
| DE (1) | DE102021006118B3 (de) |
| WO (1) | WO2023110290A1 (de) |
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| KR20250084641A (ko) * | 2023-12-04 | 2025-06-11 | 현대자동차주식회사 | 전기자동차용 구동장치 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8012057B2 (en) | 2004-05-14 | 2011-09-06 | Audi Ag | Drive device for motor vehicles |
| US20150065282A1 (en) | 2012-03-27 | 2015-03-05 | Honda Motor Co., Ltd. | Power plant |
| US20180208048A1 (en) * | 2015-09-09 | 2018-07-26 | Aisin Seiki Kabushiki Kaisha | Torque vectoring device |
| DE102017109762A1 (de) * | 2017-05-08 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Elektrische Achsantriebsvorrichtung mit Torque-Vectoring-Einheit |
| KR20190069157A (ko) | 2017-12-11 | 2019-06-19 | 현대자동차주식회사 | 토크 벡터링 장치 |
| US20210207697A1 (en) | 2020-01-08 | 2021-07-08 | Hyundai Motor Company | Torque vectoring apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7396305B2 (en) * | 2006-02-21 | 2008-07-08 | Gm Global Technology Operations, Inc. | Electrically variable transmission having three planetary gear sets, a stationary member and three fixed interconnections |
| US7374506B2 (en) * | 2006-05-25 | 2008-05-20 | Gm Global Technology Operations, Inc. | Electrically variable transmission having three planetary gear sets, a stationary member, three fixed interconnections and clutched input |
| DE102012016508B4 (de) | 2012-08-20 | 2022-03-03 | Mahle International Gmbh | Verteilergetriebe für Kraftfahrzeuge mit einer Torque Vectoring Aktorik |
| KR20170026348A (ko) * | 2014-05-06 | 2017-03-08 | 보그워너 토크트랜스퍼 시스템즈 아베 | 토크 벡터링 장치 |
-
2021
- 2021-12-13 DE DE102021006118.7A patent/DE102021006118B3/de active Active
-
2022
- 2022-11-18 CN CN202280080469.3A patent/CN118355212A/zh active Pending
- 2022-11-18 WO PCT/EP2022/082500 patent/WO2023110290A1/de not_active Ceased
- 2022-11-18 US US18/718,954 patent/US12247650B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8012057B2 (en) | 2004-05-14 | 2011-09-06 | Audi Ag | Drive device for motor vehicles |
| US20150065282A1 (en) | 2012-03-27 | 2015-03-05 | Honda Motor Co., Ltd. | Power plant |
| US20180208048A1 (en) * | 2015-09-09 | 2018-07-26 | Aisin Seiki Kabushiki Kaisha | Torque vectoring device |
| DE102017109762A1 (de) * | 2017-05-08 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Elektrische Achsantriebsvorrichtung mit Torque-Vectoring-Einheit |
| KR20190069157A (ko) | 2017-12-11 | 2019-06-19 | 현대자동차주식회사 | 토크 벡터링 장치 |
| US20210207697A1 (en) | 2020-01-08 | 2021-07-08 | Hyundai Motor Company | Torque vectoring apparatus |
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| Title |
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| "Die Umlaufgetriebe", 31 December 1998, SPRINGER VERLAG, ISBN: 978-3-642-63698-1, article MÜLLER HERBERT W.: "Die Umlaufgetriebe", XP055827790 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250067329A1 (en) | 2025-02-27 |
| US12247650B1 (en) | 2025-03-11 |
| DE102021006118B3 (de) | 2023-03-16 |
| CN118355212A (zh) | 2024-07-16 |
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