CN111204201A - Power assembly based on double motors are connected in parallel in opposition - Google Patents

Power assembly based on double motors are connected in parallel in opposition Download PDF

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Publication number
CN111204201A
CN111204201A CN202010036947.3A CN202010036947A CN111204201A CN 111204201 A CN111204201 A CN 111204201A CN 202010036947 A CN202010036947 A CN 202010036947A CN 111204201 A CN111204201 A CN 111204201A
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CN
China
Prior art keywords
differential
planetary
planetary gear
gear set
motor
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Application number
CN202010036947.3A
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Chinese (zh)
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CN111204201B (en
Inventor
蔡磊
李明远
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Zhejiang Geely Holding Group Co Ltd
Geely Automobile Research Institute Ningbo Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Geely Automobile Research Institute Ningbo Co Ltd
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Application filed by Zhejiang Geely Holding Group Co Ltd, Geely Automobile Research Institute Ningbo Co Ltd filed Critical Zhejiang Geely Holding Group Co Ltd
Priority to CN202010036947.3A priority Critical patent/CN111204201B/en
Publication of CN111204201A publication Critical patent/CN111204201A/en
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Publication of CN111204201B publication Critical patent/CN111204201B/en
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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
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/121—Power-transmission from drive shaft to hub
    • B60B35/122—Power-transmission from drive shaft to hub using gearings
    • B60B35/125—Power-transmission from drive shaft to hub using gearings of the planetary type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/14—Torque-transmitting axles composite or split, e.g. half- axles; Couplings between axle parts or sections
    • 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
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Retarders (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The invention provides a power assembly based on opposite parallel connection of double motors, and belongs to the field of transmission of electric vehicles. The power assembly includes: a housing; a first motor and a second motor; the first speed reducer sun gear and the second speed reducer sun gear are sleeved on output shafts of the first motor and the second motor; a squirrel cage planet carrier; the large planetary wheel set I and the large planetary wheel set II are respectively fixed on the left side and the right side of the squirrel-cage type planet carrier and are meshed with the first speed reducer sun gear and the second speed reducer sun gear; the small planetary wheel set I and the small planetary wheel set II are fixed on the left side and the right side of the squirrel-cage type planet carrier; the gear ring is meshed with the first small planetary gear set and the second small planetary gear set; the short differential planetary wheel set and the long differential planetary wheel set are fixed on the squirrel-cage planetary carrier; the small differential sun gear is fixedly arranged on the left half shaft and meshed with the short differential planetary gear set; and the large differential sun gear is fixedly arranged on the right half shaft and is meshed with the long differential planetary gear set. The invention can avoid the problem that the double motors and the axle can not be used universally.

Description

Power assembly based on double motors are connected in parallel in opposition
Technical Field
The invention relates to the field of transmission of electric vehicles, in particular to a power assembly based on opposite parallel connection of double motors.
Background
In recent years, new energy automobiles have been developed on a large scale in the global scope, and numerous host plants and component enterprises have launched various electric drive schemes oriented to different market positioning of finished automobiles. The positioning of the whole vehicle in the current market has two main trends: firstly, the practicability and the economy are emphasized, and secondly, the extremely driving performance brought by pursuing electric driving is emphasized. For the latter, the vehicle is generally required to be equipped with four-wheel drive systems with independent front and rear axles, and the driving power and torque of the rear axle must be greater than that of the front axle. For the drive requirements of the rear axle, the drive solutions available on the market today are: i) the parallel shaft type enhanced single motor centralized driving is adopted, such as EVD series of ZF; ii) coaxial enhanced single motor centralized drive, such as E-axe and ZF of schaeffler, the latest proposed coaxial scheme; iii) distributed wheel-rim or hub drives, such as the eTB model car developed by IAA in 2015 ZF; iv) coaxial two-motor distributed drive, such as Schaeffler E-Tron.
The above schemes all have respective limitations. Scheme i) the problem of arrangement interference is often encountered due to large size, and meanwhile, the motor and the front axle cannot be commonly used; scheme ii) also has the cost problem that the front and rear axle motors cannot be shared; scheme iii) the application of the scheme to passenger cars has the problems of increased unsprung mass and motor design, and mass-production car models do not appear; scheme iv) although theoretically, the rear axle torque vector control with the best performance can be realized, the problem that the motor control precision and reliability requirements are improved is also brought.
Disclosure of Invention
The invention aims to provide a power assembly based on opposite parallel connection of double motors, which can avoid the problem that the parallel connection of the double motors can not be commonly used with an axle.
A further object of the present invention is to avoid the risk of accidental yawing of the entire vehicle when a single motor fails.
Another further object of the invention is to save space.
In particular, the invention provides a powertrain based on opposed parallel connection of two motors, arranged at the same axle of a vehicle, said axle comprising a left half-shaft and a right half-shaft, the powertrain comprising:
a housing;
the first motor and the second motor are respectively arranged at the left half shaft and the right half shaft;
the first speed reducer sun gear and the second speed reducer sun gear are respectively sleeved on the output shaft of the first motor and the output shaft of the second motor;
a squirrel cage planet carrier supported at both ends at the housing and configured to be rotatable along an axis of the axle;
the large planetary wheel set I and the large planetary wheel set II are respectively fixed on the left side and the right side of the squirrel-cage planetary carrier and are respectively meshed with the first speed reducer sun gear and the second speed reducer sun gear;
the small planetary wheel set I and the small planetary wheel set II are respectively fixed on the left side and the right side of the squirrel-cage planetary carrier;
a planetary differential, comprising:
the gear ring is fixed at the shell and meshed with the first small planetary gear set and the second small planetary gear set;
the short differential mechanism planetary wheel set and the long differential mechanism planetary wheel set are fixed on the squirrel-cage planetary carrier;
the small differential sun gear is fixedly arranged on the left half shaft and meshed with the short differential planetary gear set;
and the large differential sun gear is fixedly arranged on the right half shaft and is meshed with the long differential planetary gear set.
Optionally, the output shaft of the first motor is coaxially sleeved outside the left half shaft;
and the output shaft of the second motor is coaxially sleeved outside the right half shaft.
Optionally, the first large planetary gear set and the second large planetary gear set each include at least 3 gears uniformly distributed along the circumferential direction.
Optionally, the first planetary gear set and the second planetary gear set each include at least 3 gears uniformly distributed along the circumferential direction.
Optionally, the short differential planetary gear set and the long differential planetary gear set each include at least 3 gears evenly distributed along the circumferential direction.
Optionally, the first large planetary gear set, the first small planetary gear set and the short differential planetary gear set are sequentially arranged from the left side to the center of the vehicle;
the second large planetary gear set, the second small planetary gear set and the planetary gear set of the long differential are sequentially arranged along the right lateral center of the vehicle.
Optionally, the length of the gear of the short differential planetary gear set in the axial direction thereof is smaller than the length of the gear of the long differential planetary gear set in the axial direction thereof.
Optionally, the outer diameter of the small differential sun is smaller than the outer diameter of the large differential sun.
Optionally, the first and second electric machines are arranged symmetrically along a mid-plane of the vehicle;
the first large planetary gear set and the second large planetary gear set are symmetrically arranged along the middle plane of the vehicle;
the first small planetary gear set and the second small planetary gear set are symmetrically arranged along the middle plane of the vehicle;
the small differential sun gear and the large differential sun gear are symmetrically arranged along a middle plane of the vehicle.
Optionally, the left and right sides of the squirrel cage planet carrier are supported at the housing by bearings.
In the structure of the invention, the motors of the front axle and the rear axle, the motor controllers and the planetary speed reducers can completely adopt the same parts, the parts have high universality, and the mass production and development cost can be saved.
Furthermore, the invention can arrange two motors and planetary reduction mechanisms thereof on two sides and realize rigid coupling. Under the arrangement, when the single-side motor fails, the power of the motor on the other side can still be symmetrically transmitted to the wheels on the two sides through the differential mechanism, so that the occurrence of unexpected deflection torque is avoided.
Furthermore, the invention can realize the compact connection of each component and avoid interference, saves the occupied space of the whole mechanism, and well solves the problem of arrangement interference of the parallel shaft type driving system in the prior art.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural diagram of a powertrain based on double-motor opposed parallel connection according to an embodiment of the invention.
Detailed Description
Fig. 1 is a schematic structural diagram of a powertrain based on double-motor opposed parallel connection according to an embodiment of the invention. As shown in fig. 1, the present invention provides a powertrain based on two motors connected in parallel and oppositely arranged, which is disposed at the same axle of a vehicle, and the axle comprises a left half shaft 20 and a right half shaft 30. In one embodiment, the powertrain includes a housing 1, a first electric machine 2, a second electric machine 3, a first reducer sun gear 4, a second reducer sun gear 5, a squirrel cage planet carrier 6, a large planetary gear set one 7, a large planetary gear set two 8, a small planetary gear set one 9, a small planetary gear set two 10, and a planetary differential. The first motor 2 and the second motor 3 are respectively provided at the left half shaft 20 and the right half shaft 30. The first speed reducer sun gear 4 and the second speed reducer sun gear 5 are respectively sleeved on the output shaft of the first motor 2 and the output shaft of the second motor 3. The cage-type carrier 6 is supported at both ends at the housing 1 and is configured to be rotatable along the axis of the axle. The first large planetary gear set 7 and the second large planetary gear set 8 are respectively fixed on the left side and the right side of the squirrel-cage type planet carrier 6 and are respectively meshed with the first speed reducer sun gear 4 and the second speed reducer sun gear 5. The first small planetary wheel set 9 and the second small planetary wheel set 10 are respectively fixed on the left side and the right side of the squirrel-cage type planet carrier 6. The planetary differential is a Schaeffler planetary-row type compact differential, and comprises a ring gear 11, a short differential planetary wheel set 12, a long differential planetary wheel set 13, a small differential sun gear 14 and a large differential sun gear 15. The gear ring 11 is fixed at the shell 1 and is meshed with the first small planetary gear set 9 and the second small planetary gear set 10. The ring gear 11 may be provided with two sets of gear teeth, which are respectively meshed with the first set of planet pinions 9 and the second set of planet pinions 10. The short differential planetary wheel set 12 and the long differential planetary wheel set 13 are both fixed on the squirrel cage planet carrier 6. The small differential sun gear 14 is fixed to the left axle shaft 20 and meshes with the short differential planetary gear set 12. The large differential sun gear 15 is fixed to the right half shaft 30 and meshes with the long differential planetary gear set 13.
Under the normal running condition of the vehicle, the rotors of the first motor 2 and the second motor 3 rotate clockwise and anticlockwise respectively when viewed from the front, and the effect is that the wheels on two sides generate forward driving force simultaneously. The power transmission path is described below, taking the left side as an example: the rotor of the first motor 2 drives the sun gear 4 of the first speed reducer, so that the squirrel-cage planet carrier 6 revolves and further drives the short differential planetary wheel set 12 and the long differential planetary wheel set 13 to revolve. The short differential planetary gear set 12 and the long differential planetary gear set 13 respectively drive the small differential sun gear 14 and the large differential sun gear 15 to rotate, and further drive the left half shaft 20 and the right half shaft 30, so as to drive the left wheel and the right wheel to rotate. The power transmission paths of the second electric machine 3 on the right side are identical and will not be described in detail.
In the above-mentioned structure of this embodiment, the motor controller of front and back axle, planetary reducer can adopt the same part completely, and spare part commonality is high, can practice thrift volume production and development cost.
On one side, when the first motor 2 on the left side is assumed to be out of order and loses power, the power of the second motor 3 on the other side (right side) can independently drive the squirrel-cage planet carrier 6 to rotate, so that the torque transmitted to the left half shaft 20 and the right half shaft 30 is reduced in amount and is still equal, and the risk of causing unexpected yaw torque to the whole vehicle is avoided. That is, in the present embodiment, two motors and their planetary reduction mechanisms can be disposed on two sides and rigidly coupled. Under the arrangement, when the single-side motor fails, the power of the motor on the other side can still be symmetrically transmitted to the wheels on the two sides through the differential mechanism, so that the occurrence of unexpected deflection torque is avoided.
As shown in fig. 1, in one embodiment, the output shaft of the first motor 2 is coaxially sleeved outside the left half shaft 20. The output shaft of the second motor 3 is coaxially sleeved outside the right half shaft 30. The arrangement is such that the first reduction gear sun gear 4 and the second reduction gear sun gear 5 are both located in the centre of the axle, i.e. in the centre position of the sun gear train.
In one embodiment, as shown in fig. 1, the large planetary gear set one 7, the small planetary gear set one 9 and the short differential planetary gear set 12 are arranged in sequence from the left side to the center of the vehicle. The second large planetary gear set 8, the second small planetary gear set 10 and the long differential planetary gear set 13 are sequentially arranged along the right lateral center of the vehicle.
In another embodiment, the first electric machine 2 and the second electric machine 3 are arranged symmetrically along the mid-plane of the vehicle. The first large planetary gear set 7 and the second large planetary gear set 8 are symmetrically arranged along the middle plane of the vehicle. The first small planetary gear set 9 and the second small planetary gear set 10 are symmetrically arranged along the middle plane of the vehicle. The small differential sun gear 14 and the large differential sun gear 15 are arranged symmetrically along the mid-plane of the vehicle.
That is, the present embodiment symmetrically arranges the components, so that the mass distribution of the powertrain can be balanced.
Optionally, each of the first large planetary gear set 7 and the second large planetary gear set 8 includes at least 3 gears uniformly distributed along the circumferential direction. Of course, in the case of a margin in the arrangement space, as many gears as possible, for example, 3 or 4 gears, can be arranged, so that the power transmission is more stable and reliable.
Optionally, each of the first and second planetary gear sets 9 and 10 includes at least 3 gears uniformly distributed along the circumferential direction.
Optionally, the short differential planetary gear set 12 and the long differential planetary gear set 13 each comprise at least 3 gears that are circumferentially equispaced.
Also, in the case of a margin in the arrangement space, as many gears as possible, for example, 3 or 4 gears, can be arranged, so that the power transmission is more stable and reliable.
In another embodiment, the length of the gear of the short differential planetary gear set 12 in its axial direction is smaller than the length of the gear of the long differential planetary gear set 13 in its axial direction. The outer diameter of the small differential sun gear 14 is smaller than the outer diameter of the large differential sun gear 15.
The arrangement and the shape of each component are set, so that the components can be compactly connected, interference is avoided, the occupied space of the whole mechanism is saved, and the problem of arrangement interference of a parallel shaft type driving system in the prior art is well solved.
Alternatively, the left and right sides of the squirrel cage planet carrier 6 are supported at the housing 1 by bearings. The housing 1 is enclosed outside the differential and the speed reducer.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A powertrain based on double-motor opposed parallel connection, provided at the same axle of a vehicle, the axle including a left half shaft and a right half shaft, characterized by comprising:
a housing;
the first motor and the second motor are respectively arranged at the left half shaft and the right half shaft;
the first speed reducer sun gear and the second speed reducer sun gear are respectively sleeved on the output shaft of the first motor and the output shaft of the second motor;
a squirrel cage planet carrier supported at both ends at the housing and configured to be rotatable along an axis of the axle;
the large planetary wheel set I and the large planetary wheel set II are respectively fixed on the left side and the right side of the squirrel-cage planetary carrier and are respectively meshed with the first speed reducer sun gear and the second speed reducer sun gear;
the small planetary wheel set I and the small planetary wheel set II are respectively fixed on the left side and the right side of the squirrel-cage planetary carrier;
a planetary differential, comprising:
the gear ring is fixed at the shell and meshed with the first small planetary gear set and the second small planetary gear set;
the short differential mechanism planetary wheel set and the long differential mechanism planetary wheel set are fixed on the squirrel-cage planetary carrier;
the small differential sun gear is fixedly arranged on the left half shaft and meshed with the short differential planetary gear set;
and the large differential sun gear is fixedly arranged on the right half shaft and is meshed with the long differential planetary gear set.
2. The powertrain of claim 1,
an output shaft of the first motor is coaxially sleeved outside the left half shaft;
and the output shaft of the second motor is coaxially sleeved outside the right half shaft.
3. The powertrain of claim 1,
the first large planetary wheel set and the second large planetary wheel set both comprise at least 3 gears which are uniformly distributed along the circumferential direction.
4. The powertrain of claim 1,
the first planetary gear set and the second planetary gear set both comprise at least 3 gears which are uniformly distributed along the circumferential direction.
5. The powertrain of claim 1,
the short differential planetary wheel set and the long differential planetary wheel set respectively comprise at least 3 gears which are uniformly distributed along the circumferential direction.
6. The locomotion assembly of any one of claims 1-5,
the first large planetary gear set, the first small planetary gear set and the short differential planetary gear set are sequentially arranged from the left side to the center of the vehicle;
the second large planetary gear set, the second small planetary gear set and the planetary gear set of the long differential are sequentially arranged along the right lateral center of the vehicle.
7. The powertrain of claim 6,
the length of the gear of the short differential planetary gear set along the axial direction is smaller than that of the gear of the long differential planetary gear set along the axial direction.
8. The powertrain of claim 7,
the outer diameter of the small differential sun gear is smaller than that of the large differential sun gear.
9. The powertrain of claim 6,
the first motor and the second motor are symmetrically arranged along a middle plane of the vehicle;
the first large planetary gear set and the second large planetary gear set are symmetrically arranged along the middle plane of the vehicle;
the first small planetary gear set and the second small planetary gear set are symmetrically arranged along the middle plane of the vehicle;
the small differential sun gear and the large differential sun gear are symmetrically arranged along a middle plane of the vehicle.
10. The powertrain of claim 1,
the left side and the right side of the squirrel-cage planet carrier are supported on the shell through bearings.
CN202010036947.3A 2020-01-14 2020-01-14 Power assembly based on double motors are connected in parallel in opposition Active CN111204201B (en)

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CN111204201B CN111204201B (en) 2021-08-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113306387A (en) * 2021-06-11 2021-08-27 中国船舶重工集团公司第七一三研究所 Current double-flow transmission mechanism

Citations (7)

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Publication number Priority date Publication date Assignee Title
CN203666270U (en) * 2013-12-30 2014-06-25 郑州精益达汽车零部件有限公司 Axle for pure electric bus
CN106555857A (en) * 2015-09-25 2017-04-05 比亚迪股份有限公司 Power-driven system and the vehicle with which
CN108237907A (en) * 2016-12-27 2018-07-03 比亚迪股份有限公司 Power-driven system and vehicle
CN108839548A (en) * 2018-06-29 2018-11-20 北京新能源汽车股份有限公司 Vehicle
CN208306352U (en) * 2018-06-15 2019-01-01 广州市新域动力技术有限公司 The electric drive axle of double electric machine double row planetary gear differential mechanism
CN109203953A (en) * 2018-10-22 2019-01-15 广州市新域动力技术有限公司 Bi-motor pure electric vehicle multimode dynamical system and its driving method
DE102018131494A1 (en) * 2017-12-13 2019-02-21 FEV Europe GmbH Electromotive powertrain and motor vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203666270U (en) * 2013-12-30 2014-06-25 郑州精益达汽车零部件有限公司 Axle for pure electric bus
CN106555857A (en) * 2015-09-25 2017-04-05 比亚迪股份有限公司 Power-driven system and the vehicle with which
CN108237907A (en) * 2016-12-27 2018-07-03 比亚迪股份有限公司 Power-driven system and vehicle
DE102018131494A1 (en) * 2017-12-13 2019-02-21 FEV Europe GmbH Electromotive powertrain and motor vehicle
CN208306352U (en) * 2018-06-15 2019-01-01 广州市新域动力技术有限公司 The electric drive axle of double electric machine double row planetary gear differential mechanism
CN108839548A (en) * 2018-06-29 2018-11-20 北京新能源汽车股份有限公司 Vehicle
CN109203953A (en) * 2018-10-22 2019-01-15 广州市新域动力技术有限公司 Bi-motor pure electric vehicle multimode dynamical system and its driving method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113306387A (en) * 2021-06-11 2021-08-27 中国船舶重工集团公司第七一三研究所 Current double-flow transmission mechanism

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