CN112406498A - Dual-motor torque vector system, control method and automobile - Google Patents
Dual-motor torque vector system, control method and automobile Download PDFInfo
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- CN112406498A CN112406498A CN202011302893.7A CN202011302893A CN112406498A CN 112406498 A CN112406498 A CN 112406498A CN 202011302893 A CN202011302893 A CN 202011302893A CN 112406498 A CN112406498 A CN 112406498A
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- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 3
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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
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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
- 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
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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
- 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
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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Abstract
The invention provides a dual-motor torque vector system, a control method and an automobile. A dual motor torque vectoring system comprising: the output end of the first double-row planetary mechanism is connected with the left wheel; the output end of the second double-row planetary mechanism is connected with the right wheel; the rotor shaft of the first motor is connected with the input end of the first double-row planetary mechanism through a first clutch; the rotor shaft of the second motor is connected with the input end of the second double-row planetary mechanism through a second clutch; and the rotor shaft of the first motor is connected with the rotor shaft of the second motor and the second clutch through a third clutch. The efficient coaxial double-motor torque vector system has the advantages of simple structure, mature technology and process, high degree of universalization of parts, small system control difficulty and capability of adapting to various working conditions.
Description
Technical Field
The invention belongs to the field of automobiles, relates to a double-motor torque vector control technology of a new energy automobile, and particularly relates to a double-motor torque vector system, a control method thereof and an automobile with the system.
Background
With the rapid development of the automobile industry, the performance requirements of drivers and passengers on vehicles are higher and higher, wherein economy and controllability are two most concerned performance indexes. The vehicle for realizing torque vector control in the market at present only has a Honda SH-AWD structure, and is applied to a rear axle in a four-wheel drive vehicle type. However, because the coaxial single-stage speed reducing mechanism is adopted, the power of the motor is limited, so that the structure cannot be used for two-drive vehicle types; the clutch is directly arranged between the half shaft and the speed reducer, so that the requirements on the strength and the durability of the clutch are very high; the single motor driven vehicle cannot run, and the high-efficiency operation of the motor cannot be guaranteed to influence the system economy; a plurality of defects of the structure limit the application of the structure to two-wheel drive vehicle models and large-scale popularization.
New energy automobiles occupy a larger and larger share of the automobile market, and are bound to become mainstream products of the automobile market in the future. The dual-motor torque vector control system inevitably becomes the mainstream of the new energy automobile market by virtue of the advantages of economy and controllability, and the market prospect is considerable.
Disclosure of Invention
The invention provides a high-efficiency coaxial double-motor torque vector system and a control method thereof, aiming at solving the problems in the prior art, improving the controllability and economy of a new energy automobile and realizing the control of the high-efficiency coaxial double-motor torque vector system.
According to one aspect of the present invention, there is provided a dual motor torque vectoring system comprising:
the output end of the first double-row planetary mechanism is connected with the left wheel;
the output end of the second double-row planetary mechanism is connected with the right wheel;
the rotor shaft of the first motor is connected with the input end of the first double-row planetary mechanism through a first clutch;
the rotor shaft of the second motor is connected with the input end of the second double-row planetary mechanism through a second clutch;
and the rotor shaft of the first motor is connected with the rotor shaft of the second motor and the second clutch through a third clutch.
Further, the first double-row planetary mechanism, the second double-row planetary mechanism, the first motor, the second motor, the first clutch, the second clutch and the third clutch are packaged and arranged inside the electric bridge.
According to another aspect of the present invention, there is provided a control method of a high-efficiency coaxial dual-motor torque vectoring system, including:
acquiring working condition information of a vehicle;
and based on the working condition information, controlling the disconnection or the connection of the first clutch, the second clutch and the third clutch, controlling the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism, controlling the first motor and the second motor to provide drive, and/or controlling the torque and the rotating speed of the first motor and the second motor.
Further, when the vehicle normally runs straight, the first clutch, the second clutch and the third clutch are controlled to be closed;
controlling the first motor or the second motor to drive independently;
and controlling the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism to enable the working points of the torque and the rotating speed of the vehicle running normally to be in accordance with the distribution of the motor efficiency Map of the first motor or the second motor.
Further, when the vehicle normally moves straight and the left wheel and the right wheel need a rotation speed difference, the first motor or the second motor is controlled to be driven independently, or the first motor and the second motor are controlled to drive the vehicle to move together;
controlling the first clutch, the second clutch and the third clutch to close;
controlling the rotation speed of the first double-row planetary mechanism and the second double-row planetary mechanism to be synchronous;
and the pressures of the first clutch and the second clutch are respectively controlled, the torque of the left wheel and the torque of the right wheel are distributed, and the rotating speed difference of the left wheel and the right wheel in the normal straight-going process of the vehicle is realized.
Further, when the vehicle is on a steep slope, is accelerated suddenly or is overtaken at a high speed, the first clutch, the second clutch and the third clutch are controlled to be closed;
controlling the first motor and the second motor to jointly drive the vehicle to run;
and controlling the torque and the rotating speed of the first motor and the second motor, and/or controlling the rotating speed of the first double-row planetary mechanism and the second double-row planetary mechanism to meet the requirement of the vehicle on the torque or the power.
Further, when the vehicle is trapped, the first clutch, the second clutch and the third clutch are controlled to be closed;
controlling the rotation speed of the first double-row planetary mechanism and the second double-row planetary mechanism to be synchronous;
controlling the first motor or the second motor to drive independently, or controlling the first motor and the second motor to drive the vehicle to run together;
and controlling the pressure of the first clutch, the second clutch and the third clutch to realize the distribution of the torque of the left wheel and the right wheel.
Further, when the vehicle slides or is braked in a deceleration way, the first clutch, the second clutch and the third clutch are controlled to be closed;
controlling the first motor or the second motor to provide negative torque, and enabling the first motor or the second motor to work in a high-efficiency area through torque distribution of the first motor and the second motor;
and when the vehicle is braked in an emergency deceleration mode, controlling the first motor and the second motor to simultaneously provide negative torque.
Further, when the vehicle turns, the third clutch is controlled to be disconnected, and the first clutch and the second clutch are controlled to be closed;
the first motor controls the torque of the left wheel through a first double-row planetary mechanism, and the second motor controls the torque of the right wheel through a second double-row planetary mechanism; and/or
And during the turning process, the first motor or the second motor corresponding to the inner wheel with the small turning radius is controlled to provide negative torque.
According to another aspect of the present invention, there is provided an automobile comprising the dual motor torque vectoring system.
The efficient coaxial double-motor torque vector system has the advantages of simple structure, mature technology and process, high degree of universalization of parts, small system control difficulty and capability of adapting to various working conditions.
In addition, according to the invention, the opening or closing of the first clutch, the second clutch and the third clutch can be controlled according to the running condition information of the vehicle, the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism are controlled, the first motor and the second motor are controlled to provide drive, the torque, the rotating speed and the like of the first motor and the second motor are controlled, the efficient coaxial double-motor torque vector control is realized, the power consumption is reduced, and the normal running economy of the vehicle is improved.
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The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 is a schematic diagram of a high efficiency coaxial dual-motor torque vectoring system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a vehicle normally executing a driving function and a control method according to an embodiment of the invention.
FIG. 3 is a schematic diagram of a vehicle energy recovery function and control method according to an embodiment of the invention.
FIG. 4 is a schematic diagram of the torque vectoring function and control method during the turning process of the vehicle according to the embodiment of the invention.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The invention aims to provide the efficient coaxial torque vector system and the control method, which have the advantages of simple structure, mature technology and process, high part generalization degree and small system control difficulty.
The invention provides a high-efficiency coaxial dual-motor torque vector system, which comprises:
the output end of the first double-row planetary mechanism is connected with the left wheel;
the output end of the second double-row planetary mechanism is connected with the right wheel;
the rotor shaft of the first motor is connected with the input end of the first double-row planetary mechanism through a first clutch;
the rotor shaft of the second motor is connected with the input end of the second double-row planetary mechanism through a second clutch;
and the rotor shaft of the first motor is connected with the rotor shaft of the second motor and the second clutch through a third clutch.
Further, the first double-row planetary mechanism, the second double-row planetary mechanism, the first motor, the second motor, the first clutch, the second clutch and the third clutch are packaged and arranged inside the electric bridge.
Specifically, the first and second double row planetary mechanisms have the same structure. Generally, a double row planetary gear mechanism includes a sun gear, a ring gear, a planet carrier with inner and outer planet gears, and the like. In the prior art, various double-row planetary gear mechanisms such as Simpson and Ravigneaux are common.
For example, the sun gears of the front and rear planet rows of the simpson-type planetary gear mechanism are connected as a whole, which is called a common sun gear assembly, the planet carrier of the front planet row and the ring gear of the rear planet row are connected as another whole, which is called a front planet carrier and a rear ring gear assembly, the output shaft is usually connected with the front planet carrier and the rear ring gear assembly, and the rear sun gear and the long planet gears, the planet carrier and the ring gear together form a single planetary gear type planet row.
In addition, the double-row planetary gear train is combined, so that a wider transmission ratio can be obtained, and the requirement on the rotating speed of the driving motor is lowered.
Specifically, a rotor shaft of the first motor is connected with an input end of the first double-row planetary mechanism, a rotor shaft of the second motor is connected with an input end of the second double-row planetary mechanism, and power is output to the left wheel and the right wheel through output ends of the first double-row planetary mechanism and the second double-row planetary mechanism so as to drive the vehicle to run.
In addition, the invention also provides a control method of the high-efficiency coaxial double-motor torque vectoring system, which comprises the following steps: acquiring working condition information of a vehicle;
and based on the working condition information, controlling the disconnection or the connection of the first clutch, the second clutch and the third clutch, controlling the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism, controlling the first motor and the second motor to provide drive, and/or controlling the torque and the rotating speed of the first motor and the second motor.
Specifically, the operating condition information of the vehicle may include: the condition that the vehicle normally travels straight, the condition that the vehicle normally travels straight and the left and right wheels need small difference in rotation speed (such as lane change and concave-convex road surface), the working conditions that the vehicle has high requirements on torque or power when climbing steep slopes, accelerating suddenly, overtaking at high speed and the like, the condition that the vehicle is trapped under severe road conditions, the condition that the vehicle slides or brakes at a reduced speed and various working conditions encountered during the running of the vehicle such as turning of the vehicle.
Preferably, when the vehicle normally travels straight, the first clutch, the second clutch and the third clutch are controlled to be closed, the first motor or the second motor is controlled to realize the independent driving of the vehicle, and the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism are controlled, so that the working points of the torque and the rotating speed of the vehicle in normal running conform to the Map distribution of the motor efficiency, and the motors are ensured to work in respective high-efficiency areas, thereby reducing the power consumption and improving the economy of the vehicle in normal running.
Preferably, when the vehicle normally moves straight and the left and right wheels need a small difference in rotation speed (such as lane change and uneven road surface), the first clutch, the second clutch and the third clutch are controlled to be closed, the first motor drives the vehicle independently (or the second motor drives independently, or the first motor and the second motor drive together), and the torque distribution of the left and right wheels is realized by controlling the pressure of the first clutch and the pressure of the second clutch, so that the requirement of the speed difference of the left and right wheels in the normal straight movement process of the vehicle is further realized.
Preferably, when the vehicle is under working conditions with high requirements on torque or power, such as steep slope climbing, rapid acceleration, high-speed overtaking and the like, the first clutch, the second clutch and the third clutch are controlled to be closed, and the first motor and the second motor are controlled to work cooperatively to drive the vehicle to run together, so that the requirements of the vehicle on dynamic property under extreme working conditions are met. In addition, the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism can be controlled, and the requirements on torque and rotating speed are met.
Preferably, when a vehicle is trapped under a poor road condition, the rotation speeds of the first double-row planetary mechanism and the second double-row planetary mechanism can be controlled to be synchronous, the first clutch, the second clutch and the third clutch are controlled to be closed, limited slip differential-free control over the left wheel and the right wheel is achieved, meanwhile, the compression force of clutch plates of the first clutch, the second clutch and the third clutch is controlled respectively, distribution of torque of the left wheel and the right wheel is achieved, and therefore the trapping removal performance of the vehicle is improved.
Preferably, when the vehicle slides or is braked in a speed reducing way, the first motor and the second motor can provide negative torque for energy recovery, and the motors are still in the high-efficiency region to work when the system recovers energy by reasonably distributing the torque of the first motor and the second motor; during emergency deceleration braking, the two motors can provide large negative torque independently (or simultaneously), and braking energy is recovered as much as possible, so that the driving economy of the vehicle is improved to the maximum extent.
Preferably, when the vehicle turned, first motor and second motor can control the moment of torsion size and the direction of left and right side wheel respectively to realize accurate moment of torsion vector control, promote the manipulation performance of vehicle. In addition, during the turning process, the first motor or the second motor can perform energy recovery by providing negative torque to decelerate the inner wheel, and the running economy of the vehicle is further improved.
To facilitate understanding of the solution of the embodiments of the present invention and the effects thereof, a specific application example is given below. It will be understood by those skilled in the art that this example is merely for the purpose of facilitating an understanding of the present invention and that any specific details thereof are not intended to limit the invention in any way.
Example 1
As shown in fig. 1, the high-efficiency coaxial dual-motor torque vectoring system mechanism of the present embodiment includes a first motor M1, a second motor M2, a first dual-planetary mechanism G1, a second dual-planetary mechanism G2, a third clutch C0, a first clutch C1, and a second clutch C2.
The first electric machine M1, the second electric machine M2, the first double row planetary mechanism G1, the second double row planetary mechanism G2, the third clutch C0, the first clutch C1 and the second clutch C2 are arranged inside the bridge in a packaging manner (the rest of the bridge system is not shown in the figure).
Specifically, the rotor shaft of the first electric machine M1 is connected to the input of the first double planetary gear G1 through a first clutch C1, the rotor shaft of the second electric machine M2 is connected to the input of the second double planetary gear G2 through a second clutch C2, and the rotor shaft of the first electric machine M1 is connected to the rotor shaft of the second electric machine M2 and the second clutch C2 through a third clutch C0. The output end of the first double-row planetary mechanism G1 is connected with the left wheel, and the output end of the second double-row planetary mechanism G2 is connected with the right wheel.
Example 2
Referring now to FIG. 2, an embodiment of a coaxial dual-motor torque vectoring system control method for a vehicle under different operating conditions is described.
As shown in fig. 2, a method for controlling the running of a vehicle driven by a single motor in a high-efficiency coaxial dual-motor torque vectoring system is disclosed, which is suitable for the situation that the vehicle runs straight normally. The third clutch C0 is closed, the first clutch C1 is closed, the second clutch C2 is closed, the first motor M1 participates in driving, the second motor M2 does not work (or the second motor M2 participates in driving, the first motor M1 does not work), power is transmitted to the left wheel and the right wheel through the first double-row planetary mechanism G1 and the second double-row planetary mechanism G2 respectively, and the vehicle is driven to run.
Further, as shown in fig. 2, the present invention is also applicable to a control method when there is a speed difference between the left and right wheels during the straight traveling of the vehicle. The third clutch C0 is closed, the first clutch C1 is closed, the second clutch C2 is closed, the first motor M1 participates in driving, the second motor M2 does not work (or the second motor M2 participates in driving, the first motor M1 does not work, or the first motor M1 and the second motor M2 participate in driving together), distribution of torque transmitted to the left and right wheels is achieved by accurately controlling the pressure of the first clutch C1 and the second clutch C2, and control of speed difference of the left and right wheels in a straight driving process is achieved.
In addition, as shown in fig. 2, the method can also be applied to a control method for driving the vehicle to run by the double motors together when the vehicle is in a working condition with high requirements on torque or power, such as steep slope climbing, rapid acceleration, high-speed overtaking and the like. The third clutch C0 is closed, the first clutch C1 is closed, the second clutch C2 is closed, the first motor M1 and the second motor M2 output power at the same time, and the power is transmitted to the left and right wheels through the first double-row planetary mechanism G1 and the second double-row planetary mechanism G2 to drive the vehicle to run.
Further, as shown in fig. 2, a control method for driving without getting out of trouble with the vehicle may be used. The third clutch C0 is closed, the first clutch C1 is closed, the second clutch C2 is closed, and the first double-row planetary mechanism G1 and the second double-row planetary mechanism G2 are controlled to rotate synchronously. The first motor M1 participates in driving and the second motor M2 does not work (or the second motor M2 participates in driving and the first motor M1 does not work, or the first motor M1 and the second motor M2 participate in driving at the same time), power is transmitted to the wheels through the double-row planetary mechanism, limited slip and no differential speed of the left and right wheels are achieved, and therefore the wheels are helped to get rid of difficulties.
Example 3
As shown in fig. 3, the embodiment is an energy recovery control method for a high-efficiency coaxial dual-motor torque vectoring system, and is suitable for the situations of coasting energy recovery and braking energy recovery.
1) And (3) recovering sliding energy: in the sliding process of the vehicle with the accelerator released by a driver, the third clutch C0 is closed, the first clutch C1 is closed, the second clutch C2 is closed, the magnitude of negative torque provided by the first motor M1 (or the second motor M2) is controlled, and the negative torque is transmitted to the left and right wheels through the first double-row planetary mechanism G1 and the second double-row planetary mechanism G2 respectively, so that the vehicle slides in a decelerating manner, and the first motor M1 or the second motor M2 is ensured to work in a high-efficiency area to generate electricity as far as possible, and therefore the vehicle sliding energy is recovered efficiently.
2) Recovering braking energy: in the process of braking the vehicle by pressing a brake pedal by a driver, the third clutch C0 is closed, the first clutch C1 is closed, the second clutch C2 is closed, and the first motor M1 (or the second motor M2, or the first motor M1 and the second motor M2 jointly) provides negative torque which is transmitted to the left and right wheels through the first double-row planetary mechanism G1 and the second double-row planetary mechanism G2 respectively, so that the vehicle is decelerated and braked, and the braking energy of the vehicle is recovered to the maximum extent on the premise of ensuring the braking performance of the vehicle.
Example 4
As shown in fig. 4, in the present embodiment, a turning driving control method for a high-efficiency coaxial dual-motor torque vectoring system vehicle is provided, where the third clutch C0 is disengaged, the first clutch C1 is engaged, the second clutch C2 is engaged, the first motor M1 controls the torque of the left wheel through the first dual-row planetary mechanism G1, and the second motor M2 controls the torque of the right wheel through the second dual-row planetary mechanism G2, so as to achieve accurate vectoring control of the torque magnitude and direction of the left and right wheels during turning, and improve the driving controllability of the vehicle.
In addition, when the inner side wheel needs negative torque during turning, the first motor M1 corresponding to the inner side wheel with small turning radius can be controlled to provide negative torque to realize energy recovery during turning, and the economical efficiency of vehicle running is further improved.
It will be appreciated by persons skilled in the art that the above description of embodiments of the invention is intended only to illustrate the benefits of embodiments of the invention and is not intended to limit embodiments of the invention to any examples given.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A dual motor torque vectoring system, comprising:
the output end of the first double-row planetary mechanism is connected with the left wheel;
the output end of the second double-row planetary mechanism is connected with the right wheel;
the rotor shaft of the first motor is connected with the input end of the first double-row planetary mechanism through a first clutch;
the rotor shaft of the second motor is connected with the input end of the second double-row planetary mechanism through a second clutch;
and the rotor shaft of the first motor is connected with the rotor shaft of the second motor and the second clutch through a third clutch.
2. The dual motor torque vectoring system of claim 1 wherein the first dual planetary mechanism, the second dual planetary mechanism, the first motor, the second motor, the first clutch, the second clutch and the third clutch are disposed within a bridge package.
3. A control method for the dual motor torque vectoring system of any one of claims 1-2 comprising:
acquiring working condition information of a vehicle;
and based on the working condition information, controlling the disconnection or the connection of the first clutch, the second clutch and the third clutch, controlling the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism, controlling the first motor and the second motor to provide drive, and/or controlling the torque and the rotating speed of the first motor and the second motor.
4. The control method according to claim 3, characterized in that the first clutch, the second clutch, and the third clutch are controlled to be closed when the vehicle is traveling normally straight;
controlling the first motor or the second motor to drive independently;
and controlling the rotating speeds of the first double-row planetary mechanism and the second double-row planetary mechanism to enable the working points of the torque and the rotating speed of the vehicle running normally to be in accordance with the distribution of the motor efficiency Map of the first motor or the second motor.
5. The control method according to claim 3, characterized in that when the vehicle normally moves straight and the left and right wheels need a rotation speed difference, the first motor or the second motor is controlled to be driven independently or the first motor and the second motor are controlled to drive the vehicle to move together;
controlling the first clutch, the second clutch and the third clutch to close;
controlling the rotation speed of the first double-row planetary mechanism and the second double-row planetary mechanism to be synchronous;
and the pressures of the first clutch and the second clutch are respectively controlled, the torque of the left wheel and the torque of the right wheel are distributed, and the rotating speed difference of the left wheel and the right wheel in the normal straight-going process of the vehicle is realized.
6. The control method according to claim 3, characterized in that the first clutch, the second clutch and the third clutch are controlled to be closed when the vehicle is on a steep hill climb, a sudden acceleration or a high speed overtake;
controlling the first motor and the second motor to jointly drive the vehicle to run;
and controlling the torque and the rotating speed of the first motor and the second motor, and/or controlling the rotating speed of the first double-row planetary mechanism and the second double-row planetary mechanism to meet the requirement of the vehicle on the torque or the power.
7. The control method according to claim 3, characterized in that the first clutch, the second clutch, and the third clutch are controlled to be closed when the vehicle is trapped;
controlling the rotation speed of the first double-row planetary mechanism and the second double-row planetary mechanism to be synchronous;
controlling the first motor or the second motor to drive independently, or controlling the first motor and the second motor to drive the vehicle to run together;
and controlling the pressure of the first clutch, the second clutch and the third clutch to realize the distribution of the torque of the left wheel and the right wheel.
8. The control method according to claim 3, characterized in that the first clutch, the second clutch and the third clutch are controlled to be closed when the vehicle is coasting or during deceleration braking;
controlling the first motor or the second motor to provide negative torque, and enabling the first motor or the second motor to work in a high-efficiency area through torque distribution of the first motor and the second motor;
and when the vehicle is braked in an emergency deceleration mode, controlling the first motor and the second motor to simultaneously provide negative torque.
9. The control method according to claim 3, characterized in that when the vehicle turns, the third clutch is controlled to be open, and the first clutch and the second clutch are controlled to be closed;
the first motor controls the torque of the left wheel through a first double-row planetary mechanism, and the second motor controls the torque of the right wheel through a second double-row planetary mechanism; and/or
And during the turning process, the first motor or the second motor corresponding to the inner wheel with the small turning radius is controlled to provide negative torque.
10. An automobile comprising the dual motor torque vectoring system of claim 1 or 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011302893.7A CN112406498A (en) | 2020-11-19 | 2020-11-19 | Dual-motor torque vector system, control method and automobile |
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| CN202011302893.7A CN112406498A (en) | 2020-11-19 | 2020-11-19 | Dual-motor torque vector system, control method and automobile |
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| CN112406498A true CN112406498A (en) | 2021-02-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113103863A (en) * | 2021-04-23 | 2021-07-13 | 北京科技大学 | Double-side double-motor independent drive assembly of all-wheel drive special vehicle based on synchronous clutch |
| DE102022103837B3 (en) | 2022-02-17 | 2023-02-02 | Audi Aktiengesellschaft | Driving device for a vehicle axle |
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