CN115465086A - Drive unit and drive device - Google Patents

Drive unit and drive device Download PDF

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Publication number
CN115465086A
CN115465086A CN202210646158.0A CN202210646158A CN115465086A CN 115465086 A CN115465086 A CN 115465086A CN 202210646158 A CN202210646158 A CN 202210646158A CN 115465086 A CN115465086 A CN 115465086A
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CN
China
Prior art keywords
electric rotating
shaft
rotating machine
drive unit
clutch
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Pending
Application number
CN202210646158.0A
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Chinese (zh)
Inventor
洛朗·巴尤
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of CN115465086A publication Critical patent/CN115465086A/en
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    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • 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
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    • 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
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    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B60K6/383—One-way clutches or freewheel devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • 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
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    • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
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    • 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
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    • 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
    • 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
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
    • F16H1/10—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes one of the members being internally toothed
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to a drive unit for a drive train of an electrically drivable motor vehicle, in particular a hybrid motor vehicle, and to a drive arrangement. The drive unit (1) comprises a first electric rotating machine (10) and a second electric rotating machine (20) and a first shaft (40) and a second shaft (41), wherein a rotor (11) of the first electric rotating machine (10) is coupled in a rotationally fixed manner to the first shaft (40), and wherein the drive unit (1) furthermore has a first separating clutch (50), wherein according to the invention it is proposed that the drive unit (1) furthermore has a second clutch (120) by means of which a rotor (21) of the second electric rotating machine (20) can be connected for transmitting torque to the second shaft (41) or to the second shaft (41). With the drive unit and the drive device according to the invention, optimum operation can be ensured in a cost-effective manner and in particular in a space-saving manner.

Description

Drive unit and drive device
Technical Field
The invention relates to a drive unit for a drive train of an electrically drivable motor vehicle, in particular a hybrid motor vehicle, and to a drive device.
Background
From the prior art, drive units are known which are integrated in a drive device or a drive aggregate.
DE 11 2015 006 071 T5 discloses a hybrid vehicle drive system having: a generator capable of generating electric energy using power of the internal combustion engine; an electric motor driven by electric power to drive a wheel; a housing that houses a generator and a motor; and a power control unit for controlling the generator and the motor. The generator and the electric motor are arranged side by side in the housing on the same axis.
WO 2019 101 A1 discloses a drive train for a hybrid vehicle. The powertrain includes a transmission input shaft operatively associated with the first electric machine and the internal combustion engine for transmitting torque via the first sub-powertrain, and operatively associated with the second electric machine for transmitting torque via the second sub-powertrain. The two electric machines are arranged coaxially and axially adjacent to each other.
US 2016/0218584 A1 describes a control unit for controlling a motor, wherein the control unit is mounted at a housing of a drive unit comprising the motor. The drive unit comprises two electric motors which are arranged coaxially and axially adjacent to one another.
EP 1502791 B1 and EP1847411B1 each disclose a hybrid transmission for a hybrid vehicle having a plurality of electric rotating machines. The motors are arranged radially nested. The radially outer electric rotating machine is designed here as an outer rotor.
Furthermore, so-called hybrid transmissions are known, which have two electric machines that can be switched between series operation and parallel operation. In series operation, the internal combustion engine drives the first electric machine, which operates as a generator. The electrical energy generated thereby is used to drive a second electrical machine, the torque of which is transmitted to the wheels of the motor vehicle equipped with the hybrid transmission. In parallel operation, the torque of the connected internal combustion engine is transmitted to the wheels of the motor vehicle equipped with the hybrid transmission, wherein the second electric machine spins idle, supporting the driving operation or also energy recovery.
This conventional concept with two electrical devices nested inside one another is shown in fig. 1:
the internal combustion engine 110 is directly connected via the first transmission stage 70 to the first electric rotating machine 10, which is in this case designed as an inner rotor, which operates as a generator.
The second electric rotating machine 20, which serves as an electric travel drive, is likewise defined here as an inner rotor and the two further transmission stages 71, 72 are connected to the wheel drive shaft 103.
The rotor 11 of the first electric machine 10 is coupled in a rotationally fixed manner to the first shaft 40. The rotor 21 of the second electric machine 20 is coupled in a rotationally fixed manner to a second shaft 41, which extends coaxially with respect to the first shaft 41 on the radial outside thereof. In the torque transmission path between the two electric rotating machines 10, 20, there is a first separator clutch 50, which enables series travel in the open state and parallel travel in the closed state.
A disadvantage of this arrangement is that in parallel operation, the second electric rotating machine 20 is frequently idling, and corresponding resistance forces are generated by induction and must even actively rotate together, for which electrical energy must be expended. Thereby reducing efficiency.
Disclosure of Invention
Starting from this, the invention is based on the object of providing a drive unit and a drive device equipped therewith which ensure efficient operation in a cost-effective design and in a space-saving manner.
The object is achieved by a drive unit according to the invention. Advantageous embodiments of the drive unit are given below.
In addition, a drive device is provided according to the invention, which has a drive unit.
The features of the claims can be combined in any technically meaningful way and in any case, wherein the features set forth in the description below and in the drawings can also be considered, which includes additional embodiments of the invention.
The terms "axially" and "radially" refer throughout the scope of the invention to a rotational axis of the drive unit, which corresponds to a rotational axis of at least one electric rotating machine comprised by the drive unit.
The invention relates to a drive unit for a drive train of an electrically drivable motor vehicle, in particular a hybrid motor vehicle. The drive unit comprises a first electric rotating machine and a second electric rotating machine and a first shaft and a second shaft, wherein the rotor of the first electric rotating machine is coupled in a rotationally fixed manner to the first shaft. The drive unit furthermore has a first clutch by means of which the rotor of the first electric rotating machine can be connected to the second shaft or to the second shaft for torque transmission. According to the invention, the drive unit furthermore has a second clutch, by means of which the rotor of the second electric rotating machine can be connected to the second shaft or to the second shaft for transmitting torque.
By disconnecting the second clutch, the second electric rotating machine can thus be decoupled from the drive axle or wheels of the vehicle in terms of its characteristics as a drive machine. Accordingly, the driving operation can be ensured by means of a pure internal combustion engine drive without having to absorb the efficiency losses caused by the second electric rotating machine.
The second clutch makes it possible to quickly engage the second electric rotating machine into the torque transmission path again by closing, so that the drive unit is placed in the series connection of the electric rotating machines, for example, in order to perform high accelerations.
The first separation clutch is provided in a torque transmission path extending from the first electric rotating machine toward the second shaft, or is provided for opening and closing the torque transmission path. For rotatably supporting the first shaft and/or the second shaft, the drive unit has a central bearing or a central bearing unit, which is formed in one or more parts and by means of which the first shaft and/or the second shaft is supported at the housing of the drive unit.
For example, the first electric rotating machine may be used to transmit torque to the input side of the drive unit, so that starting of an internal combustion engine connected to the input side is possible. Alternatively, one or both electric rotating machines can also provide torque and, together with a connected internal combustion engine, realize hybrid operation of the drive unit.
In particular, the second clutch may be a one-way clutch. By means of the one-way clutch, it is possible to transmit its torque in one direction of rotation of the second electric rotating machine to the second shaft. In the opposite rotational direction, the one-way clutch separates a torque transmission path between the second shaft and the rotor of the second electric rotating machine.
Correspondingly, efficiency losses or so-called drag losses can be reduced in parallel operation. Further, the one-way clutch is a clutch between the second shaft and the rotor of the second electric rotating machine. Furthermore, the one-way clutch enables a rapid coupling of the second electric rotating machine to the drive train, so that a series operation is possible, in particular during acceleration. The rotational speeds of the input side and the output side of the one-way clutch are not required to be synchronized.
In particular, the one-way clutch can be a switchable one-way clutch. Such a switchable one-way clutch is a particularly cost-effective embodiment in order to be able to achieve energy recovery by means of the second electric rotating machine, since the closure of the torque transmission path between the rotor of the second electric rotating machine and the second shaft can thereby be switched.
The switchable one-way clutch can in this case have as an actuating device a magnet or a hydraulic actuator which acts directly on the moving element of the one-way clutch.
In an alternative embodiment, it is provided that the second clutch is a claw clutch.
In the embodiment in which the second clutch is designed as a claw clutch, it is proposed that, when the clutch is closed, the rotational speeds on the input side and on the output side or the first engaging element and the second engaging element of the claw clutch be adapted to one another by means of an adjustment of the rotational speed of the second electric rotating machine, so that the claw clutch is actuated with only a small rotational speed difference.
In this case, the first separating clutch can be designed in particular as a multiplate clutch in the known embodiment.
The second electric rotating machine may be designed as an internal rotor motor, wherein the second clutch is arranged axially inside a space radially delimited by the rotor of the second electric rotating machine, in particular if it is designed as a one-way clutch.
In one embodiment of the drive unit, the drive unit comprises a first housing and a second housing which jointly define a housing interior space in which the two electric rotating machines are arranged and in which the first shaft and the second shaft are arranged at least in regions.
In particular, the second shaft can be mounted on the second housing, wherein the first shaft can be mounted on the first housing and on the second shaft. Further, power electronics for controlling the electric rotating machine may be carried by the second housing.
The rotor of the first electric rotating machine can be directly coupled with the first shaft such that the rotational speeds of the first shaft and the rotor of the first electric rotating machine are equal. In an alternative embodiment, it is provided that the rotor of the first electric rotating machine is coupled indirectly via the first gear stage, so that the torque that can be provided by the rotor of the first electric rotating machine and the corresponding rotational speed are transmitted to the first shaft via the first gear stage.
In an embodiment with an advantageous embodiment, the two shafts are arranged coaxially.
For this purpose, it is proposed, in particular, that the second shaft is designed as a hollow shaft and that the first shaft section extends within the second shaft.
In one embodiment, it is provided that the first electric rotating machine is provided for generator operation. The rotor of the first electric rotating machine can be constructed relatively small so as to have a small moment of inertia.
A second electric rotating machine can be provided for driving the motor in operation. The rotor of the electric rotating machine is relatively large and is capable of generating a correspondingly large torque.
The drive unit can furthermore comprise a first gear stage, wherein the first gear stage is formed by a connecting element of the drive unit, which comprises a gearwheel with an internal toothing, and a first shaft, which has an element with an external toothing, and wherein the toothing of the gearwheel with the internal toothing and the external toothing engage one another in order to transmit a rotary motion from the connecting element to the first shaft. Correspondingly, the drive unit according to the invention is designed as a so-called hybrid transmission. This therefore means that the drive unit has a transmission in addition to the electric rotating machine and the shaft. In particular, the element with the external toothing can be a gearwheel arranged on the first shaft in a rotationally fixed manner.
The drive unit can furthermore have a second gear stage, which is formed by the toothing of the second shaft, in particular its outer toothing, and the first gear wheel meshing with the toothing of the second shaft.
In one embodiment of the drive unit having a transmission, the first gear wheel can be coupled in a rotationally fixed manner to an intermediate shaft of the transmission. The transmission can include a differential in the driven region. In this case, the external toothing of the intermediate shaft can mesh with the input gear of the differential, so that a third transmission ratio step is achieved.
The second shaft thus serves here as a transmission input shaft and is operatively connected to the transmission in such a way that the torque provided by the second shaft or the rotational movement effected by the second shaft can be transmitted to another transmission unit of the motor vehicle via the transmission in an accelerated or decelerated manner or also directly to the drive wheels of the motor vehicle.
Furthermore, according to the invention, a drive device is provided, which has a drive unit according to the invention and an internal combustion engine, wherein a driven element of the internal combustion engine is coupled or can be coupled in a rotationally fixed manner to a rotor of the first electric rotating machine.
In the operation of a motor vehicle, in particular a hybrid vehicle, having a drive arrangement according to the invention, which comprises a drive unit according to the invention and an internal combustion engine, the following driving modes can be implemented, for example:
electric driving and energy recovery:
the first separation clutch is disengaged, whereby the second electric rotating machine is decoupled from the first electric rotating machine and the internal combustion engine. The second clutch is closed. The second electric rotating machine is thus operated solely as a traction machine or as a generator. The internal combustion engine and the first electric rotating machine do not operate.
-series travel and charging:
the first separator-clutch is opened. The internal combustion engine is started by means of the first electric rotating machine, wherein the internal combustion engine is capable of driving the first electric rotating machine such that the first electric rotating machine is operated as a generator in order to charge a battery of the motor vehicle. The second clutch is closed. The second electric rotating machine operates as a traction machine.
Parallel hybrid drive, charging and propulsion:
the first and second separators are closed, whereby the first electric rotating machine, the second electric rotating machine, and the internal combustion engine are coupled to each other. The motor vehicle is driven by means of an internal combustion engine and/or one or two electric rotating machines. The two electric rotating machines can be operated as traction means or as generators.
In a further embodiment, the drive device also comprises at least one wheel drive shaft, at which wheels of the motor vehicle provided with the drive device are to be arranged, and which is connected to a second shaft of the drive unit via a transmission of the drive unit, such that a rotational movement effected by the second shaft can be transmitted via the transmission to the wheel drive shaft and thus to the wheels.
According to one embodiment of the drive device, the drive device can have a damper connected in a rotationally fixed manner to the connecting element of the drive unit and a housing element mechanically connected to the internal combustion engine, wherein the damper is arranged in the housing element.
The housing element is advantageously connected here to the second housing of the drive unit.
A pump actuator of a cooling circuit of the drive unit can be mounted in the housing element.
Furthermore, it can be provided that the intermediate shaft and/or the wheel drive shaft are mounted axially in the housing element on the one hand and in the second housing on the other hand.
Drawings
The invention described above is explained in more detail below in the context of the relevant art with reference to the accompanying drawings, which show preferred embodiments. The invention is not in any way restricted to the purely schematic drawings, in which it is to be noted that the embodiments shown in the figures are not limited to the dimensions shown. Shown in the drawings are:
figure 1 shows a schematic view of a drive device according to the prior art with a drive unit according to the invention,
fig. 2 shows a schematic view of a first embodiment of a drive device according to the invention with a drive unit according to the invention, and
fig. 3 shows a schematic illustration of a second embodiment of a drive device according to the invention with a drive unit according to the invention.
Detailed Description
Fig. 1 has been discussed for purposes of illustrating the prior art.
Fig. 2 shows a schematic illustration of a drive device 100 according to the invention having a first embodiment of a drive unit 1 according to the invention.
The drive unit 1 includes a first electric rotating machine 10, a second electric rotating machine 20, a first shaft 40, and a second shaft 41.
Furthermore, the drive device 100 comprises an internal combustion engine 110 and a vibration damper 101, wherein a driven element 111 of the internal combustion engine 110 is coupled to the vibration damper 101. The vibration damper 101 is furthermore connected to a connecting element 4 of the drive 1, which serves as the input side 2 of the drive 1. The internal combustion engine 110 is thereby coupled to the drive 1 via the vibration damper 110.
The connecting element 4 is coupled to the first shaft 40 in such a way that a first gear stage 70 is formed between the connecting element 4 and the first shaft 40. The connecting element 4 here comprises a toothed wheel 5 with an internal toothing.
The rotor 11 of the first electric rotating machine 10 is connected in a rotationally fixed manner to the first shaft 40, and the rotor 21 of the second electric rotating machine 20 is connected or connectable to the second shaft 41 via a second clutch 120, which is in this case designed as a one-way clutch. The connection of the rotor 11 of the first electric rotating machine 10 with the first shaft 40 is implemented such that the rotor 11 of the first electric rotating machine 10 is directly provided on the first shaft 40.
The rotor 11 of the first electric rotating machine 10 is here arranged radially inside the stator 12 of the first electric rotating machine 10. The rotor 21 of the second electric rotating machine 20 is coupled with the second shaft by the second clutch 120 configured as a one-way clutch. The rotor 21 of the second electric rotating machine 20 is here arranged radially inside the stator 22 of the second electric rotating machine 20.
The first electric rotating machine 10 is disposed axially beside the second electric rotating machine 20. Here, the two electric rotating machines 10 and 20 are configured as inner rotor motors.
The first separating clutch 50 of the drive unit 1 is connected by its input side 51 to the first shaft 40 and by its output side 52 to the second shaft 41. The first disconnect clutch 50 is thus used to transfer torque between the first shaft 40 and the second shaft 41. Correspondingly, the torque transmission path between the rotor 11 of the first electric rotating machine 10 and the rotor 21 of the second electric rotating machine 20 can be opened or closed by means of the first separation clutch 50.
The second shaft 41 is designed as a hollow shaft and the first shaft 40 extends in sections radially inside the second shaft 41. The two shafts 40, 41 thus extend coaxially to each other, wherein the rotors 11, 21 of the two electric rotating machines 10, 20 are arranged coaxially to each other and to the shafts 40, 41.
The second shaft 41 is connected to the countershaft 81 via a second gear stage 71. The intermediate shaft 81 runs parallel to the second shaft 41.
The countershaft 81 is connected via the third gear stage 72 to an input element of a differential 80 of the drive unit 1 for torque transmission. The differential 80 forms the output side 3 of the drive unit 1.
The wheel drive shaft 103, on which the wheels of the motor vehicle provided with the drive 100 are to be arranged, forms the output of the differential 80, so that the rotational movement effected by the second shaft 41 can be transmitted via the second gear stage 71 and the third gear stage 72 and via the differential 80 to the wheel drive shaft 103 and thus to the wheels.
The torque provided by the internal combustion engine 110 is transmitted via the vibration damper 101 and via the first transmission stage 70 to the first shaft 40 of the drive unit 1. If the first separator clutch 50 is disengaged, the torque of the internal combustion engine 110 is transmitted only to the rotor 11 of the first electric rotating machine 10. The first electric rotating machine 10 can be used to charge a battery in generator operation. If the first disconnect clutch 50 is closed, the torque provided by the internal combustion engine 110 is transferred from the first shaft 40 to the second shaft 41. From the second shaft 41, the torque of the internal combustion engine 110 is transmitted via the second gear stage 71 to the countershaft 81 and via the third gear stage 72 to the differential 80. Via the differential 80, the torque reaches the wheels of the motor vehicle provided with the drive 100 by means of the wheel drive shaft 103.
The torque provided by the rotor 11 of the first electric rotating machine 10 can be transmitted to the internal combustion engine 110 via the first transmission stage 70 when the first separating clutch 50 is disengaged. When the first separating clutch 50 is closed, torque is transmitted via the second gear stage 71 and the third gear stage 72 to the differential 80 and thus to the wheel drive shaft 103.
The torque provided by the rotor 21 of the second electric rotating machine 20 is transmitted to the differential 80 via the second clutch 120 and the second transmission stage 71 and the third transmission stage 72 independently of the switching of the first separating clutch 50 and is transmitted to the wheel drive shaft 103.
The second clutch may open or close a torque transmission path between the second shaft 42 and the rotor of the second electric rotating machine 22. In an embodiment as a one-way clutch, the second clutch may close the torque transmission path when the rotor of the second electric rotating machine 20 rotates in a first rotational direction, and may open the torque transmission path when the rotor of the second electric rotating machine 20 rotates in a second, opposite rotational direction. The drive device 100 can be operated correspondingly in a plurality of driving operating modes.
By disengaging the second clutch 120, the second electric rotating machine 20 is decoupled from the operation of the first electric rotating machine 10 and the internal combustion engine 110, so that no energy is required to rotate the rotor 21 of the second electric rotating machine 20.
Fig. 3 shows a schematic illustration of a drive device according to the invention with a drive unit according to the invention in a second embodiment.
In the variant of drive 100 shown here, it is also provided that internal combustion engine 110 is connected to vibration damper 101 in a rotationally fixed manner via a driven element 111. The vibration damper 101 is connected to the input side 2 of the drive unit 1 via a connecting element 4. The connecting element 4 is coupled in a rotationally fixed manner to a rotor 11 of the first electric rotating machine 10.
The rotor 11 of the first electric rotating machine 10 is furthermore connected in a rotationally fixed manner to the outer toothing of the first gear stage 70, so that the torque provided by the rotor 11 of the first electric rotating machine 10 is transmitted via said first gear stage to the first shaft 40 connected in a rotationally fixed manner to the first gear stage 70. The first shaft 40 is connected to an input side 51 of a first splitter-splitter 50. The output 52 of the first separator clutch 50 is coupled to the second shaft 41. Further, a one-way clutch 120, on which the rotor 21 of the second electric rotating machine 20 is seated, is connected to the second shaft 41.
Depending on the direction of rotation, it is therefore possible to transmit torque from the second electric rotating machine 20 to the second shaft 41 via the one-way clutch 120, or, however, to interrupt the torque transmission path between the second shaft 41 and the rotor 21 of the second electric rotating machine 20.
The one-way clutch 120 is here axially placed in a space radially delimited by the rotor 21 of the second electric rotating machine 20.
Second shaft 41 is coupled via a second gear stage 71 and an intermediate shaft 81 and via a third gear stage 72 to differential 80 and thus also to a wheel drive shaft 103 arranged therein.
With the drive unit and the drive device provided with the drive unit proposed here, a device is provided which ensures efficient operation with a cost-effective design and a space-saving construction.
List of reference numerals:
1. drive unit
2. Input side of a drive unit
3. Output side of drive unit
4. Connecting element for a drive unit
5. Gear wheel of a connecting element with an internal toothing
10. First electric rotating machine
11. Rotor of first electric rotating machine
12. Stator of first electric rotating machine
20. Second electric rotating machine
21. Rotor of second electric rotating machine
22. Stator of second electric rotating machine
40. First shaft
41. Second shaft
50. First separation clutch
51. Input side of a first disconnect clutch
52. Output side of the first separating clutch
70. First gear stage
71. Second gear stage
72. Third gear stage
80. Differential mechanism
81. Intermediate shaft
100. Drive device
101. Vibration damper
103. Wheel drive axle
110. Internal combustion engine
111. Driven element of internal combustion engine
120. Second clutch

Claims (10)

1. A drive unit (1) for a drive train of an electrically drivable motor vehicle, having a first electric rotating machine (10) and a second electric rotating machine (20) and a first shaft (40) and a second shaft (41), wherein a rotor (11) of the first electric rotating machine (10) is coupled in a rotationally fixed manner to the first shaft (40), and wherein the drive unit (1) furthermore has a first decoupling clutch (50) by means of which the rotor (11) of the first electric rotating machine (10) can be connected to the second shaft (41) or to the second shaft (41) for transmitting a torque,
it is characterized in that the preparation method is characterized in that,
the drive unit (1) further comprises a second clutch (120) by means of which a rotor (21) of the second electric rotating machine (20) can be connected to the second shaft (41) or to the second shaft (41) for transmitting torque.
2. The drive unit as set forth in claim 1,
it is characterized in that the preparation method is characterized in that,
the second clutch (120) is a one-way clutch.
3. The drive unit as set forth in claim 2,
it is characterized in that the preparation method is characterized in that,
the one-way clutch is a switchable one-way clutch.
4. The drive unit as set forth in claim 3,
it is characterized in that the preparation method is characterized in that,
the switchable one-way clutch has, as an actuating device, a magnet which acts directly on the moving element of the one-way clutch or a hydraulic actuator.
5. The drive unit as set forth in claim 1,
it is characterized in that the preparation method is characterized in that,
the second clutch (120) is a dog clutch.
6. The drive unit (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the second electric rotating machine (20) is configured as an inner rotor motor, wherein the second clutch (120) is disposed axially inside a space radially bounded by a rotor (21) of the second electric rotating machine (20).
7. The drive unit (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the rotor (11) of the first electric rotating machine (10) is coupled with the first shaft (40) directly or indirectly via a first transmission stage (70).
8. The drive unit (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the first electric rotating machine (10) is provided for generator operation.
9. The drive unit (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the second electric rotating machine (20) is provided for driving the motor to operate.
10. A drive arrangement (100) having a drive unit (1) according to one of claims 1 to 9 and an internal combustion engine (110) which is coupled or can be coupled with the rotor (11) of the first electric rotating machine (10) in a rotationally fixed manner by means of a driven element (111) of the internal combustion engine (110).
CN202210646158.0A 2021-06-10 2022-06-09 Drive unit and drive device Pending CN115465086A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021114919.3 2021-06-10
DE102021114919.3A DE102021114919A1 (en) 2021-06-10 2021-06-10 Drive unit and drive arrangement

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Publication Number Publication Date
CN115465086A true CN115465086A (en) 2022-12-13

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CN202210646158.0A Pending CN115465086A (en) 2021-06-10 2022-06-09 Drive unit and drive device

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Publication number Priority date Publication date Assignee Title
JP3641243B2 (en) 2002-02-26 2005-04-20 日産自動車株式会社 Hybrid transmission
JP3823957B2 (en) 2003-07-30 2006-09-20 日産自動車株式会社 Mode change control device for hybrid transmission
JP6573456B2 (en) 2015-01-28 2019-09-11 本田技研工業株式会社 Integrated unit
CN107206884B (en) 2015-01-28 2019-09-06 本田技研工业株式会社 Drive device for hybrid vehicle
KR102478059B1 (en) 2017-11-21 2022-12-16 현대자동차주식회사 Transmission for electric vehicles
DE102017127695A1 (en) 2017-11-23 2019-05-23 Schaeffler Technologies AG & Co. KG Hybrid powertrain with two electric machines and one internal combustion engine
DE102019209939A1 (en) 2019-07-05 2021-01-07 Zf Friedrichshafen Ag Compact hybrid transmission

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