CN109228888A - The Dual-motors Driving method of electric vehicle and electric vehicle - Google Patents
The Dual-motors Driving method of electric vehicle and electric vehicle Download PDFInfo
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- CN109228888A CN109228888A CN201811320356.8A CN201811320356A CN109228888A CN 109228888 A CN109228888 A CN 109228888A CN 201811320356 A CN201811320356 A CN 201811320356A CN 109228888 A CN109228888 A CN 109228888A
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- motor
- electric vehicle
- gearbox
- load
- transmission shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
- B60L15/2018—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking for braking on a slope
-
- 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
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/32—Control or regulation of multiple-unit electrically-propelled vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- 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
- Y02T10/64—Electric machine technologies in electromobility
-
- 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
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
Abstract
The invention proposes a kind of Dual-motors Driving methods of electric vehicle and electric vehicle, wherein electric vehicle includes: first motor, on the vehicle body of electric vehicle；Gearbox is sequentially connected positioned at first motor close to one end of the tailstock of electric vehicle, gearbox and first motor, and gearbox is for adjusting transmission ratio；Transmission shaft is connect with gearbox transmission, and first motor is connected by gearbox with transmission shaft, and transmission shaft is used to transmit the power of first motor；Second motor, on the vehicle body of electric vehicle, the second motor is connect with transmission shaft driven, and transmission shaft is also used to transmit the power of the second motor.According to the technical solution of the present invention, the first motor being connected with gearbox and the second motor being connected with transmission shaft are provided on electric vehicle, allow two motors individually to run or be operated together according to different operating conditions, realizes Dynamic Optimum, avoid energy waste；The grade climbing performance of conevying efficiency and vehicle is also improved, and cost is lower.
Description
Technical field
The present invention relates to vehicle technology fields, in particular to a kind of electric vehicle and a kind of bi-motor of electric vehicle
Driving method.
Background technique
Pure electric vehicle expanded letter vehicle mostly uses single motor to replace engine, the i.e. transmission mode of " single motor+gearbox " at present, this
Sample need to configure high-power high torque motor and gearbox, but meet the single motor and gearbox often need of power and torque demand
Customized development is wanted, acquisition cost and maintenance cost are very high；Heavy-duty motor actually uses motor under unloaded or level road operating condition
Power is less than the half of motor rated power, and there are power dissipation phenomenons；In addition, the electronic expanded letter vehicle of single motor mode, in weight
When carrying upward slope or descending, in order to obtain more large torque, vehicle needs reduction of speed torque increase, causes the speed of service very low, seriously affects fortune
Defeated efficiency, and under descending operating condition, by gearbox power and torque limit, braking energy cannot be recycled completely, and recovery efficiency is low.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
In view of this, it is an object of the present invention to provide a kind of electric vehicles.
It is another object of the present invention to provide a kind of Dual-motors Driving methods of electric vehicle.
To achieve the goals above, the technical solution of first aspect present invention provides a kind of electric vehicle, comprising: the first electricity
Machine, on the vehicle body of electric vehicle；Gearbox, positioned at first motor close to one end of the tailstock of electric vehicle, gearbox and first
Motor drive connection, gearbox is for adjusting transmission ratio；Transmission shaft is connect with gearbox transmission, and first motor passes through gearbox
It is connected with transmission shaft, transmission shaft is used to transmit the power of first motor；Second motor, on the vehicle body of electric vehicle, the second electricity
Machine is connect with transmission shaft driven, and transmission shaft is also used to transmit the power of the second motor.
In the technical scheme, by being provided with first motor and the second motor on electric vehicle, convenient for according to vehicle work
The difference of condition provides power using different motors, realizes the purpose of " the small small load of horse traction, the big big load of horse traction ", avoids energy
Source waste；Biggish torque and higher speed can also be provided when vehicle is climbed, improve conevying efficiency.
Specifically, first motor is connect with gearbox, and transmission shaft is connect with gearbox, is conducive to run in first motor
When, after changing deceleration torque increase by gearbox, then by transmission shaft driving speed reducer, low speed and large torque power is improved, makes first
Motor is suitable for low-speed heave-load or the operating condition of light grade；And the second motor is connect with transmission shaft driven, i.e. the second motor moves
Power directly drives speed reducer by transmission shaft without gearbox, high rpm low torque power is provided, so that the second motor
Suitable for high speed is unloaded or the operating condition of underloading, further, under the operating condition of heavily loaded heavy grade, then the can be started simultaneously
One motor and the second motor avoid energy waste to realize the purpose of " the small small load of horse traction, the big big load of horse traction "；It can also
Biggish torque and higher speed are provided in vehicle climbing, improves conevying efficiency.
Optionally, the electric vehicle in the present invention include electronic expanded letter vehicle, it is electric self-unloading car, any one in electronic slag-soil truck
Kind.
In the above-mentioned technical solutions, electric vehicle further include: load cell, on the vehicle body of electric vehicle, load-transducing
Device is used to obtain the load of electric vehicle；Slope Transducer, on the vehicle body of electric vehicle, Slope Transducer is for obtaining electric vehicle
The road grade of traveling；Wherein, first motor is electrically connected with load cell and Slope Transducer respectively, according to load-transducing
The revolving speed of the grade signal adjustment first motor of the load signal and Slope Transducer of device；Second motor respectively with load-transducing
Device and Slope Transducer electrical connection, according to the grade signal of the load signal of load cell and Slope Transducer adjustment the
The revolving speed of two motors.
In the technical scheme, by the way that load cell and Slope Transducer are arranged on electric vehicle, convenient for obtaining vehicle
Loading condition and road gradient situation, thus according to load and the gradient concrete condition, first motor or list is activated individually
Solely the second motor of starting, or start first motor and the second motor simultaneously, to realize " the small small load of horse traction, the big big load of horse traction "
Purpose, avoid energy waste；And biggish torque and higher speed, Lifting Convey efficiency are provided in vehicle climbing；Separately
Outside, it by the setting of load cell and Slope Transducer, is additionally favorable for realizing the automatic Pilot of vehicle, promotes the comfort of driving
And convenience.
It should be pointed out that the revolving speed of adjustment first motor, includes the case where that revolving speed is zero, i.e., first motor is to stop shape
State；The revolving speed of the second motor is adjusted, also includes the case where that revolving speed is zero, is i.e. the second motor is halted state.
In the above-mentioned technical solutions, the second motor is between gearbox and transmission shaft.
In the technical scheme, the second motor is set between gearbox and transmission shaft, is convenient for the second motor and transmission shaft
Coaxially connected, transmission efficiency is high, and compact-sized and simple, is conducive to save space and saves component, reduces cost.
In the above-mentioned technical solutions, electric vehicle further include: jackshaft and rear axle, along electric vehicle headstock to the direction of the tailstock according to
Secondary setting, jackshaft are connected with the middle part of transmission shaft, and rear axle is connected with transmission shaft close to one end of the tailstock, and jackshaft and rear axle are used to incite somebody to action
The power of transmission shaft passes to the wheel of electric vehicle.
In the technical scheme, by being connected in the middle part of jackshaft and transmission shaft, convenient for the power (torque) on transmission shaft is passed
Pass the wheel in the middle part of vehicle；It is connected with transmission shaft close to one end of the tailstock by rear axle, convenient for (turning round the power on transmission shaft
Square) pass to the wheel of vehicle rear.
In the above-mentioned technical solutions, electric vehicle further include: speed reducer is set on rear axle, and speed reducer and transmission shaft driven connect
It connects, speed reducer is used to transmit torque to wheel.
In the technical scheme, by the way that speed reducer, and speed reducer and transmission axis connection are arranged on rear axle, convenient for further
Ground reduction of speed torque increase promotes rear-wheel torque, and then guarantees that vehicle has enough driving forces and climbing capacity；What is needed to pay attention to is that
The load-carrying of general lorry concentrates on rear-wheel, in other words at rear axle position, therefore speed reducer is arranged in rear axle, is more advantageous to vehicle
It is smooth driving and traveling.
In any of the above-described technical solution, gearbox includes two grades of gearboxes, three class gear box, in four-speed gear shift case
Any one.
In the technical scheme, by selecting the gearbox less than five gears, be conducive to reduce gearbox size, reduce speed change
Case the space occupied improves the flexibility of gearbox arrangement, and gear number also helps simplified gearbox designs less than five gears,
Reduce cost.
In any of the above-described technical solution, the second motor is permanent torque motor.
In the technical scheme, by setting permanent torque motor for the second motor, be conducive to when vehicle is climbed, second
Motor is capable of providing constant torque, guarantees the climbing capacity of vehicle, and first motor can then be provided in climbing for vehicle
Acceleration capacity realizes that ramp accelerates, Lifting Convey efficiency.
When two motors are run simultaneously, the deficiency that torque declines after speed improves when can make up single motor operation is realized high
Fast large torque output is suitble to heavy duty upward slope or heavily loaded high-speed working condition, to can not only guarantee the climbing power demand of vehicle, but also can
To promote the conevying efficiency of vehicle.
In any of the above-described technical solution, the rated power of the second motor is less than the rated power of first motor.
In the technical scheme, the rated power of the second motor is set as the rated power less than first motor, favorably
In the scope of application for promoting first motor, simplify the manipulation of vehicle；And second motor be directly connected to transmission shaft, it is powerdriven
It is high-efficient, and the second motor is mainly used for the situation of underloading or zero load, power demand is low, therefore its rated power can be appropriate
Cost is reduced less than the rated power of first motor to save space.
In any of the above-described technical solution, electric vehicle further include: climb and fall detector, on the vehicle body of electric vehicle,
Climb and fall detector is connected with first motor and the second motor, and climb and fall detector is used to obtain the climb and fall state of electric vehicle,
Wherein, when electric vehicle is upward slope state, first motor and/or the second motor are adjusted to drive mode；It is descending in electric vehicle
When state, first motor and/or the second motor are adjusted to braking mode.
In the technical scheme, by the setting of climb and fall detector, be conducive to the climb and fall state according to electric vehicle, and
When adjust the mode of motor, i.e., motor mode is adjusted to drive mode when going up a slope, in order to provide the power of climbing, in descending
When motor mode is adjusted to braking mode, provide brake force, and by climb and fall detector, be also convenient for realizing the automatic of vehicle
Change and drives.
In any of the above-described technical solution, load cell includes any one in pressure sensor and range sensor
Kind.
In the technical scheme, the load cell on electric vehicle uses pressure sensor, convenient for passing through measurement vehicle
Pressure obtains measurement goods weight load；Using range sensor, convenient for obtaining goods at a distance from vehicle body by measuring cargo
The volume of object loads.
The technical solution of second aspect of the present invention provides a kind of Dual-motors Driving method of electric vehicle, is used for above-mentioned first
The electric vehicle of any one of aspect technical solution, comprising: obtain the load of electric vehicle；Judge whether load is greater than default load；
If so, the first motor that starting is connected with gearbox；If it is not, the second motor that starting is connected with transmission shaft.
In the technical scheme, by the load of acquisition electric vehicle, the operating condition of electric vehicle when driving is segmented, this
Sample is convenient for the concrete condition according to operating condition, starts different motors, to provide different power for electric vehicle, realizes " big horse traction
The Dynamic Optimum of big load, the small load of small horse traction ", avoids energy waste, and ensure that the power of vehicle.
Specifically, when loading less than or equal to default load, i.e., vehicle is unloaded or is lightly loaded, and at this moment belongs to " small load ",
Start the second motor being connected with transmission shaft, provided power is supported vehicle operation enough, realized " the small small load of horse traction "
Purpose；Relative to the prior art arrangement using single heavy-duty motor, the energy can be substantially saved in this way, avoids wave
Take；It is greater than default load in load, vehicle operation needs biggish power, starts the first motor being connected with gearbox at this time,
First motor can provide biggish torque by gearbox deceleration torque increase, so as to realize the mesh of " the big big load of horse traction "
, save the energy.
In the above-mentioned technical solutions, when load is greater than default load, the Dual-motors Driving method of electric vehicle further include: obtain
Take the road grade where electric vehicle；Judge whether road grade is greater than the default gradient；If it is not, keeping starting first motor；If
It is to restart the second motor, to increase the torque of electric vehicle.
In the technical scheme, when load is greater than default load, vehicle operation needs biggish power, starts at this time
The first motor that is connected with gearbox provides power, if vehicle driving on level road, power that first motor provides
Vehicle driving can be supported, if the road where vehicle has the gradient, only power provided by the first vehicle can
It can be not enough to that vehicle is supported to raise speed or brake, at this time, it is necessary to consider the second motor of starting to increase torque, therefore, pass through
Road grade is obtained, when road grade is less than or equal to the default gradient, first motor can support vehicle to run, and keep starting the
One motor, to save the energy；When road grade is greater than the default gradient, restart the second motor, to increase electric vehicle
Torque guarantees climbing capacity of the vehicle when going up a slope, and first motor can provide constant rotational speed and come for vehicle acceleration, guarantee fortune
Defeated efficiency；Or stopping power when by starting the second motor guarantee vehicle descending, avoid single motor braking hypodynamic
Situation improves the safety of vehicle driving, and the purpose of " the big big load of horse traction " is furthermore achieved.
In the above-mentioned technical solutions, " first motor that starting is connected with gearbox " specifically includes: being in upper in electric vehicle
When ramp shaped state, start the drive mode of first motor；When electric vehicle is in descending state, start the braking mould of first motor
Formula；" the second motor that starting is connected with transmission shaft " specifically includes: when electric vehicle is in upward slope state, the second motor of starting
Drive mode；When electric vehicle is in descending state, start the braking mode of the second motor；" restarting the second motor " specifically wraps
It includes: when electric vehicle is in upward slope state, starting the drive mode of the second motor；When electric vehicle is in descending state, starting
The braking mode of second motor.
In the technical scheme, vehicle resistance for being subject to when going up a slope is larger, it is desirable to provide and driving force overcomes resistance, because
The drive mode of this starting first motor perhaps starts the drive mode of the second motor or starts first motor and the simultaneously
The drive mode of two motors, to guarantee the climbing capacity of vehicle；And in descending, vehicle, can be certainly under acceleration of gravity effect
Dynamic glide downwards simultaneously accelerate, and need brake force at this time to overcome the influence of acceleration of gravity and reduction of speed, avoid the too fast appearance of speed
Safety accident, therefore start the braking mode of first motor perhaps starts the braking mode of the second motor or starts the simultaneously
The braking mode of one motor and the second motor, to guarantee the stopping power of vehicle.
In the above-mentioned technical solutions, after " restarting the second motor ", further includes:
Keep the gear of the gearbox of electric vehicle constant.
In the technical scheme, by keeping the gear of gearbox constant, gearbox can be caused to avoid shift hunting
Excessive abrasion, protects gearbox, reduces the failure rate of gearbox, extend the service life of gearbox, ensure that vehicle
The rate of attendance.
It is to be appreciated that when load is greater than default load and road grade is greater than the default gradient, if an only electricity
Machine needs reduction of speed downshift when going up a slope to promote torque and then provide more large driving force；Reduction of speed downshift is needed to be promoted when descending
Torque and then the bigger brake force of offer；In the present invention, the second motor is also started, i.e. two motors start simultaneously, Ke Yi
In the case where guaranteeing that the original speed of vehicle is constant, more large torque is exported, so as to keep gearbox gear constant, is avoided frequently
Shift.
In any of the above-described technical solution, the rated power of first motor is greater than the rated power of the second motor.
In the technical scheme, by the way that the rated power of first motor to be set greater than to the rated power of the second motor,
Be conducive to, for different load and the gradient, individually run first motor in the case where segmenting vehicle load and the gradient
With the second motor, or first motor and the second motor are run simultaneously, with the power of realization " big horse traction big carry, the small load of small horse traction "
Optimization, avoids energy waste, and ensure that the power of vehicle.
In addition, as previously mentioned, the second motor is directly connected to transmission shaft, it is powerdriven high-efficient, and the second motor master
It is used for the situation of underloading or zero load, power demand to be low, therefore its rated power can be appropriate specified less than first motor
Power reduces cost to save space.
In any of the above-described technical solution, load includes any one in goods weight or measurement of cargo on electric vehicle
Kind.
In the technical scheme, load includes any one in the goods weight or measurement of cargo on electric vehicle, favorably
The convenience of vehicle control is promoted in the sensor of flexibly selection load measure to adapt to different cargos.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Fig. 1 is the overlooking structure diagram of the electric vehicle of one embodiment of the present of invention；
Fig. 2 is the flow diagram of the driving method of the electric vehicle of one embodiment of the present of invention；
Fig. 3 is the flow diagram of the driving method of the electric vehicle of one embodiment of the present of invention；
Fig. 4 is the power curve schematic diagram of the bi-motor of the electric vehicle of one embodiment of the present of invention.
Wherein, the appended drawing reference in Fig. 1 and the corresponding relationship between component names are as follows:
10 first motors, 12 second motors, 16 gearboxes, 18 transmission shafts, 20 jackshafts, 22 rear axles.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
It is described according to some embodiments of the present invention referring to Fig. 1 to 4 figures.
As shown in Figure 1, a kind of electric vehicle of the one embodiment proposed according to the present invention, comprising: first motor is set to electricity
On the vehicle body of motor-car；Gearbox connects positioned at first motor close to one end of the tailstock of electric vehicle, gearbox and first motor transmission
It connects, gearbox is for adjusting transmission ratio；Transmission shaft is connect with gearbox transmission, and first motor passes through gearbox and transmission shaft phase
Even, transmission shaft is used to transmit the power of first motor；Second motor, on the vehicle body of electric vehicle, the second motor and transmission shaft
Transmission connection, transmission shaft are also used to transmit the power of the second motor.
In this embodiment, by being provided with first motor and the second motor on electric vehicle, convenient for according to vehicle working condition
Difference, power is provided using different motors, realizes the purpose of " the small small load of horse traction, the big big load of horse traction ", avoids the energy
Waste；Biggish torque and higher speed can also be provided when vehicle is climbed, improve conevying efficiency.
Specifically, first motor is connect with gearbox, and transmission shaft is connect with gearbox, is conducive to run in first motor
When, after changing deceleration torque increase by gearbox, then by transmission shaft driving speed reducer, low speed and large torque power is improved, makes first
Motor is suitable for low-speed heave-load or the operating condition of light grade；And the second motor is connect with transmission shaft driven, i.e. the second motor moves
Power directly drives speed reducer by transmission shaft without gearbox, high rpm low torque power is provided, so that the second motor
Suitable for high speed is unloaded or the operating condition of underloading, further, under the operating condition of heavily loaded heavy grade, then the can be started simultaneously
One motor and the second motor avoid energy waste to realize the purpose of " the small small load of horse traction, the big big load of horse traction "；It can also
Biggish torque and higher speed are provided in vehicle climbing, improves conevying efficiency；Certainly, in the enough feelings of rated power
Under condition, the role of first motor and the second motor be can be interchanged, i.e. first motor can be used for unloaded or light duty, and second
Motor can be used for the case where heavily loaded light grade, be conducive in this way when a motor breaks down, another motor still may be used
Guarantee the rate of attendance of vehicle with normal work, promotes the convenience that vehicle uses.
It is to be appreciated that the second motor is connected with transmission shaft, it can separate with first motor, transport each independently in this way
Row, to be run simultaneously using different motors or two motors in vehicle working condition difference, to save the energy
At the same time it can also be ensured that vehicle has power powerful enough；Setting for a heavy-duty motor is used in compared with the existing technology
It sets, two in the application motor can use the standardization motor of smaller power, not need individually to customize, convenient for buying and dimension
Shield, and cost is lower, meanwhile, the gear quantitative requirement of gearbox can also be reduced, so that the knot of gearbox can also be simplified
Structure reduces the cost of gearbox；The setting of two motors, can also be when a motor breaks down, another motor is still
It can guarantee the operation of vehicle, promote the vehicle rate of attendance.
It may also be noted that since the second motor is connected directly with transmission shaft without gearbox, in this way, in heavy duty
Under descending operating condition, when first motor can not be provided enough braking torques by gearbox power and torque limit, the second motor may be used also
Enough braking torques are provided and not will receive the limitation of gearbox, braking energy is can be realized and recycles entirely, improve descending electricity system
Energy recovery efficiency, saves the energy；In the case where bi-motor starts work simultaneously, when vehicle is shifted gears, gearbox
Subsequent second motor is connected with transmission shaft, is not influenced by shift, can realize smooth shift to avoid power interruption；Second electricity
Machine is connected with transmission shaft rather than is connected with gearbox, and setting can also be avoided before gearbox to integrate first motor power and the
The transmission case of two motor powers, saves space and component, reduces costs.
Optionally, the electric vehicle in the present invention includes but is not limited to electronic expanded letter vehicle, electric self-unloading car, in electronic slag-soil truck
Any one.
The connection type of second motor and transmission shaft, shaft and transmission shaft including the second motor are coaxially connected, Huo Zhe
The shaft of two motors is parallel with transmission shaft, and centre passes through the various ways such as the driving members such as gear, belt connection.
In the above-described embodiments, electric vehicle further include: load cell, on the vehicle body of electric vehicle, load cell
For obtaining the load of electric vehicle；Slope Transducer, on the vehicle body of electric vehicle, Slope Transducer is for obtaining electronic garage
The road grade sailed；Wherein, first motor is electrically connected with load cell and Slope Transducer respectively, according to load cell
Load signal and Slope Transducer grade signal adjustment first motor revolving speed；Second motor respectively with load cell
It is electrically connected with Slope Transducer, according to the grade signal of the load signal of load cell and Slope Transducer adjustment second
The revolving speed of motor.
In this embodiment, by the way that load cell and Slope Transducer are arranged on electric vehicle, convenient for obtaining vehicle
The gradient situation of loading condition and road, so that first motor or independent be activated individually according to the concrete condition of load and the gradient
Start the second motor, or start first motor and the second motor simultaneously, to realize " the small small load of horse traction, the big big load of horse traction "
Purpose avoids energy waste；And biggish torque and higher speed, Lifting Convey efficiency are provided in vehicle climbing；In addition,
By the setting of load cell and Slope Transducer, be additionally favorable for realizing the automatic Pilot of vehicle, promoted driving comfort and
Convenience.
It should be pointed out that the revolving speed of adjustment first motor, includes the case where that revolving speed is zero, i.e., first motor is to stop shape
State；The revolving speed of the second motor is adjusted, also includes the case where that revolving speed is zero, is i.e. the second motor is halted state.
In the above-described embodiments, the second motor is between gearbox and transmission shaft, in this way convenient for the second motor and transmission
Axis is coaxially connected, and transmission efficiency is high, and compact-sized and simple, is conducive to save space and saves component, reduces cost.
In the above-described embodiments, electric vehicle further include: jackshaft and rear axle, along electric vehicle headstock to the direction of the tailstock successively
Setting, jackshaft are connected with the middle part of transmission shaft, and rear axle is connected with transmission shaft close to one end of the tailstock, and jackshaft and rear axle will be for that will pass
The power of moving axis passes to the wheel of electric vehicle.
In this embodiment, by being connected in the middle part of jackshaft and transmission shaft, convenient for the power (torque) on transmission shaft is transmitted
To the wheel in the middle part of vehicle；It is connected with transmission shaft close to one end of the tailstock by rear axle, convenient for (turning round the power on transmission shaft
Square) pass to the wheel of vehicle rear.
In the above-described embodiments, electric vehicle further include: speed reducer is set on rear axle, and speed reducer is connect with transmission shaft driven,
Speed reducer is used to transmit torque to wheel.
In this embodiment, by the way that speed reducer, and speed reducer and transmission axis connection are arranged on rear axle, convenient for further
Reduction of speed torque increase promotes rear-wheel torque, and then guarantees that vehicle has enough driving forces and climbing capacity；What is needed to pay attention to is that one
As the load-carrying of lorry concentrate on rear-wheel, in other words at rear axle position, therefore speed reducer is set in rear axle, is more advantageous to vehicle
It is smooth driving and traveling.
In any of the above-described embodiment, gearbox includes two grades of gearboxes, three class gear box, appointing in four-speed gear shift case
It anticipates one kind.
In this embodiment, by selecting the gearbox less than five gears, be conducive to reduce gearbox size, reduce gearbox
The space occupied improves the flexibility of gearbox arrangement, and gear number also helps simplified gearbox designs less than five gears, drops
Low cost.
It should be pointed out that gear number can be selected since the lower motor of rated power can be selected in the application
Gearbox less than five gears can not then make this selection if it is heavy-duty motor.
In any of the above-described embodiment, the second motor is permanent torque motor, is conducive in this way when vehicle is climbed, second
Motor is capable of providing constant torque, guarantees the climbing capacity of vehicle, and first motor can then be provided in climbing for vehicle
Acceleration capacity realizes that ramp accelerates, Lifting Convey efficiency.
When two motors are run simultaneously, the deficiency that torque declines after speed improves when can make up single motor operation is realized high
Fast large torque output is suitble to heavy duty upward slope or heavily loaded high-speed working condition, to can not only guarantee the climbing power demand of vehicle, but also can
To promote the conevying efficiency of vehicle.
In any of the above-described embodiment, the rated power of the second motor is less than the rated power of first motor.
In this embodiment, the rated power of the second motor is set as the rated power less than first motor, be conducive to
The scope of application of first motor is promoted, the manipulation of vehicle is simplified；And second motor be directly connected to transmission shaft, powerdriven effect
Rate is high, and the second motor is mainly used for the situation of underloading or zero load, and power demand is low, therefore its rated power can be with appropriate small
Cost is reduced in the rated power of first motor to save space.
In any of the above-described embodiment, electric vehicle further include: climb and fall detector, on the vehicle body of electric vehicle, on
Descending detector is connected with first motor and the second motor, and climb and fall detector is used to obtain the climb and fall state of electric vehicle,
In, when electric vehicle is upward slope state, first motor and/or the second motor are adjusted to drive mode；It is lower ramp shaped in electric vehicle
When state, first motor and/or the second motor are adjusted to braking mode.
In this embodiment, by the setting of climb and fall detector, be conducive to the climb and fall state according to electric vehicle, in time
The mode of motor is adjusted, i.e., motor mode is adjusted to drive mode when going up a slope, in order to provide the power of climbing, in descending
Motor mode is adjusted to braking mode, provides brake force, and by climb and fall detector, is also convenient for realizing the automation of vehicle
It drives.
In any of the above-described embodiment, load cell includes any one in pressure sensor and range sensor
Kind.
In this embodiment, the load cell on electric vehicle uses pressure sensor, convenient for passing through the pressure of measurement vehicle
Power obtains measurement goods weight load；Using range sensor, convenient for obtaining cargo at a distance from vehicle body by measuring cargo
Volume load.
The electronic expanded letter vehicle of a specific embodiment according to the present invention, using Dual-motors Driving, in original first motor
On the basis of adding gearbox, second motor is installed between gearbox and transmission shaft as auxiliary.Two motors are respectively by two
Platform Frequency Converter Control, according to different operating conditions, first motor and the second motor can isolated operation, can also two motors run simultaneously, i.e.,
It is greater than default load in load, and when road grade is greater than the default gradient, is run using bi-motor, realizes low cost, efficiently
The operation of rate, high climbable gradient.
The first motor being arranged on electronic expanded letter vehicle and the second motor, are all made of standard electromotor, can be directly using batch
The matured product of production, convenient for purchase and maintenance, acquisition cost is at low cost compared with the single motor for needing to customize research and development；Bi-motor mode
It is lower compared with more gear case costs of single motor model selection using few gear gearbox (such as two gears, three gears or four gears).
Single motor independent operating when the electronic expanded letter vehicle of bi-motor can realize unloaded or low-load, light grade is high load, big
Bi-motor is run simultaneously when the gradient, the Dynamic Optimum of " big horse traction big carry, the small load of small horse traction " to realize.
In this embodiment, the second motor isolated operation directly drives rear axle speed-reducing machine by transmission shaft, provides height
Rpm low torque power is suitble to high speed unloaded or the operating condition of underloading；First motor isolated operation, after gearbox deceleration torque increase,
Main gear reducer is driven by transmission shaft again, low speed and large torque power is provided, is suitble to the operating condition of low-speed heave-load or light grade；And it weighs
When load, the operating condition of heavy grade, then two motors are run simultaneously, and the speed-raising of the torques such as realization, uniform velocity propose torsion and propose torsion simultaneously,
To improve climbing capacity and conevying efficiency.
Fig. 4 shows the power graph of the bi-motor operation of the electronic expanded letter vehicle in this specific embodiment, such as Fig. 4 institute
To show, first motor can not just raise speed again after reaching maximum power, and under bi-motor operational mode, the second motor can provide constant
Torque, first motor provide acceleration capacity, realize that ramp accelerates, Lifting Convey efficiency.
Specifically, such as on first motor level road vehicle driving is driven, when switching to upward slope operation by level road, first motor
Grade climbing performance can only be provided by reduction of speed, and start the second motor at this time, can by first motor provide constant rotational speed, second
Motor exports large torque, realizes that reduction of speed, such two motor are not run simultaneously for climbing, when can make up first motor (single motor) operation
The deficiency that torque declines after speed improves realizes the output of high speed large torque, and suitable heavy duty is gone up a slope or heavily loaded high-speed working condition, can meet
The raising of vehicle climbing power demand and conevying efficiency.
Further, the electronic expanded letter vehicle of Dual-motors Driving, under heavy loads under the operating condition of slope, when first motor is by gearbox power
When can not provide enough braking torques with torque limit, foot is can also be provided due to being directly connected to transmission shaft in the second motor
It reaches braking torque and is not limited by gearbox, realize that braking energy recycles entirely；In addition, bi-motor is run simultaneously, when gearbox changes
When gear, subsequent second motor of gearbox stills provide power, avoids power interruption, realizes smooth shift, improves vehicle row
The stability sailed.
By using the electric vehicle of the bi-motor in the present invention, power of motor waste is avoided, realize " big horse traction is big to be carried,
The Dynamic Optimum of the small small load of horse traction ", improves electrical machinery life；Directly it is connected with transmission shaft by the second motor, improves descending
When braking energy recovery efficiency；Bi-motor is run simultaneously, also improves the speed of service, improves carload freight efficiency；The present invention
Bi-motor electric vehicle, also reduce the overall cost of motor and gearbox, thereby reduce complete machine acquisition cost, improve
The convenience of maintenance.
As shown in Fig. 2, the Dual-motors Driving method of the electric vehicle of the one embodiment proposed according to the present invention, including it is following
Step:
Step 100: obtaining the load of electric vehicle；
It is only to start an electricity convenient for determination to understand the payload size of electric vehicle by obtaining the load of electric vehicle
Machine is to save the energy, or starts two motors simultaneously and guarantee torque.
Step 102: judging whether load is greater than default load；
By comparing and judge whether load is greater than default load, the load convenient for determining vehicle is unloaded or underloading, also
It is heavy duty or fully loaded, to be conducive to that different motors is selected to work, guarantees the conevying efficiency of vehicle, and save the energy.
Step 104: if so, the first motor that starting is connected with gearbox；
When load is greater than default load, illustrate that vehicle is in heavy duty or fully loaded state, vehicle load is larger at this time, needs
The power wanted is larger, therefore the first motor that starting is connected with gearbox, can be in this way vehicle by gearbox reduction of speed torque increase
Biggish power is provided.
Optionally, if the rated power of the second motor is sufficiently large, the second motor substitution first motor also can be used and come
Drive vehicle.
Step 106: if it is not, the second motor that starting is connected with transmission shaft.
Load is less than or equal to default load, illustrates that vehicle is in unloaded or underloading state, at this point, vehicle load is small,
Required power is also small, therefore either level road, upward slope, descending, can only start the second motor being connected with transmission shaft,
Directly to transmit power to vehicle, energy consumption is reduced；It is of course also possible to only start first motor.
It is to be appreciated that being the payload size first obtained in the present embodiment, restart first motor or the second motor；
In other some embodiments, it is also possible to first start a motor, situations such as further according to payload size, road grade etc.,
To determine whether starting two motors simultaneously, i.e., being for the sequence between the acquisition of operating condition and judgement, with electric motor starting can be with
Exchange, in other words, acquisition and judgement for operating condition, be continue along with driving, and to operating condition carry out continue acquisition, and
Only operating condition is not judged once, persistent collection with judge operating condition, and be adjusted at any time according to operating condition.
As shown in figure 3, the Dual-motors Driving method of the electric vehicle of another embodiment proposed according to the present invention, including under
Column step:
Step 20: obtaining the load of electric vehicle；
Step 21: judging whether load is greater than default load；
Step 22: if load is greater than default load, starting the first motor being connected with gearbox；
When load is greater than default load, illustrate that vehicle is in heavy duty or fully loaded state, vehicle load is larger at this time, needs
The power wanted is larger, therefore the first motor that starting is connected with gearbox, can be in this way vehicle by gearbox reduction of speed torque increase
Biggish power is provided.
Step 23: obtaining the climb and fall state of electric vehicle；
By obtaining the climb and fall state of electric vehicle, convenient for determining that the specific mode after electric motor starting is specifically being gone up a slope
When, vehicle is needed motor using drive mode to overcome resistance by resistance；When descending, effect of the vehicle in weight acceleration
Under, speed can gradually be accelerated, it is therefore desirable to which brake force slows down the speed of vehicle, avoids that safety accident occurs, therefore in descending
When, using the braking mode of motor.
Step 230: if upward slope, then starting the drive mode of first motor；
Step 231: obtaining the road grade where electric vehicle；
Road grade is different, also different for the power demand of vehicle, especially vehicle load and when all larger gradient, more
It is to need biggish power, therefore by the road grade where acquisition electric vehicle, be conducive to segment vehicle working condition, and according to tool
Body situation uses single motor operation to save the energy or bi-motor operation, to guarantee the climbing energy of conevying efficiency and vehicle
Power.
Step 232: judging whether road grade is greater than the default gradient；
Step 233: if road grade is greater than the default gradient, restarting the drive mode of the second motor；
Road grade is greater than the default gradient, and is heavy duty or goes up a slope in the case where fully loaded, needs vehicle to have at this time larger
Climbing capacity then need reduction of speed torque increase if it is being still single motor operation, in the present embodiment, by restarting the
Two motors can make vehicle in the case where keeping speed constant, still can export biggish torque, guarantee climbing capacity,
It realizes the purpose of " the big big load of horse traction ", and due to not needing shift reduction of speed, also avoids gearbox caused by shift hunting
Abrasion, reduces the failure rate of gearbox, extends the service life of gearbox.
Step 234: if road grade is not greater than the default gradient, keeping the drive mode of first motor；
Road grade is not more than the default gradient, illustrates that road is in level road or the lesser situation of the gradient, required dynamic
Power (torque) is also little, therefore can only start a motor, to save the energy, realizes the purpose of " the small small load of horse traction ".
Step 240: if descending, then starting the braking mode of first motor；
Braking mode by starting first motor avoids the speed in descending convenient for overcoming the influence of acceleration of gravity
It is too fast to cause safety accident.
Step 241: obtaining the road grade where electric vehicle；
Step 242: judging whether road grade is greater than the default gradient；
Step 243: if road grade is greater than the default gradient, restarting the braking mode of the second motor；
In descending, road grade is greater than the default gradient, and vehicle is in heavy duty or full load condition, the shadow of weight acceleration
Sound is larger, by starting the braking mode of first motor and the second motor simultaneously, can increase the torque of vehicle output, to be
Vehicle provides enough brake force, avoids speed too fast, ensure that the safety of vehicle driving.
Step 244: if road grade is not greater than the default gradient, keeping the braking mode of first motor；
Road grade is less than or equal to the default gradient, i.e. road is level road or light grade situation, and required power is smaller, therefore
The braking mode of starting first motor is kept, i.e., only starts a motor job and is saved with the purpose of realization " the small small load of horse traction "
The energy.
Step 26: if load is not greater than default load, starting the second motor being connected with transmission shaft；
Since load is no more than default load, that is, smaller or unloaded, required power very little is loaded, therefore can star straight
Vehicle power demand can be met by connecing the second motor being connected with transmission shaft, and save the energy.
It is to be appreciated that the rated power of the second motor is less than first motor, further to save the energy and purchase cost.
Step 27: obtaining the climb and fall state of electric vehicle；
Step 270: if upward slope, then starting the drive mode of the second motor；
Step 271: if descending, then starting the braking mode of the second motor.
It should be pointed out that under unloaded or light condition, since vehicle load is small, power needed for the traveling of vehicle is also very
It is small, therefore the gradient of the road travelled without the concern for vehicle, only enable a motor.
In the Dual-motors Driving method of the electric vehicle of a specific embodiment according to the present invention, motor corresponding with operating condition
Working condition, motor mode are as shown in the table:
| Operating condition | Electric machine operation state | Motor mode |
| Unloaded or underloading+level road | First motor or the second motor | Driving |
| Heavily loaded or fully loaded+level road | First motor or the second motor | Driving |
| Unloaded or underloading+upper clivia | First motor or the second motor | Driving |
| Fully loaded or heavy duty+Shang great Po | First motor and the second motor | Driving |
| Unloaded or underloading+lower clivia | First motor or the second motor | Braking |
| Fully loaded or heavy duty+Xia great Po | First motor and the second motor | Braking |
In upper table, unloaded or underloading refers to that load is less than or equal to default load；Fully loaded or heavy duty refers to that load is big
In default load；Upper clivia, lower clivia, level road each mean that road grade is less than the default gradient；Shang great Po, Xia great Po are each meant
The road gradient is greater than the default gradient.
By upper table it is apparent that by entire car controller to load and gradient real-time measurement and calculating, dynamic is selected
Select that a motor works independently or two motors work at the same time, i.e., be greater than default load in load, and road grade be greater than it is pre-
If when the gradient, first motor and the second motor start simultaneously, to guarantee vehicle in the case where not slowing down, still be able to output compared with
Big torque, so that there is enough brake force when providing stronger climbing capacity or descending for vehicle, and rest working conditions
Under, all only with a motor operation, to avoid the waste of the energy.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, according to the technical solution of the present invention, in electric vehicle
It is upper to be provided with the first motor being connected with gearbox and the second motor being connected with transmission shaft, allow two motors according to not
Same operating condition individually runs or is operated together, and realizes the Dynamic Optimum purpose of " the small small load of horse traction, the big big load of horse traction ", keeps away
Energy waste is exempted from；Can also vehicle climb when in not reduction of speed under the premise of biggish torque is provided, improve conevying efficiency
With the grade climbing performance of vehicle, and cost is lower.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (16)
1. a kind of electric vehicle characterized by comprising
First motor, on the vehicle body of the electric vehicle；
Gearbox, positioned at the first motor close to one end of the tailstock of the electric vehicle, the gearbox and first electricity
Machine transmission connection, the gearbox is for adjusting transmission ratio；
Transmission shaft is connect with the gearbox transmission, and the first motor is connected by the gearbox with the transmission shaft, institute
Transmission shaft is stated for transmitting the power of the first motor；
Second motor, on the vehicle body of the electric vehicle, second motor is connect with the transmission shaft driven, the transmission
Axis is also used to transmit the power of second motor.
2. electric vehicle according to claim 1, which is characterized in that further include:
Load cell, on the vehicle body of the electric vehicle, the load cell is used to obtain the load of the electric vehicle；
Slope Transducer, on the vehicle body of the electric vehicle, the Slope Transducer is used to obtain the electric vehicle traveling
Road grade；
Wherein, the first motor is electrically connected with the load cell and the Slope Transducer respectively, according to described negative
The load signal of set sensor and the grade signal of the Slope Transducer adjust the revolving speed of the first motor；Described second
Motor is electrically connected with the load cell and the Slope Transducer respectively, according to the load signal of the load cell
And the grade signal of the Slope Transducer adjusts the revolving speed of second motor.
3. electric vehicle according to claim 1, which is characterized in that
Second motor is between the gearbox and the transmission shaft.
4. electric vehicle according to claim 1, which is characterized in that further include:
Jackshaft and rear axle, the headstock along the electric vehicle are set gradually to the direction of the tailstock, the jackshaft and the transmission shaft
Middle part is connected, and the rear axle is connected with the transmission shaft close to one end of the tailstock, and the jackshaft and the rear axle are used to incite somebody to action
The power of the transmission shaft passes to the wheel of the electric vehicle.
5. electric vehicle according to claim 4, which is characterized in that further include:
Speed reducer is set on the rear axle, and the speed reducer is connect with the transmission shaft driven, and the speed reducer is used for described
Wheel transmits torque.
6. electric vehicle according to any one of claims 1-5, which is characterized in that
The gearbox includes two grades of gearboxes, three class gear box, any one in four-speed gear shift case.
7. electric vehicle according to any one of claims 1-5, which is characterized in that
Second motor is permanent torque motor.
8. electric vehicle according to any one of claims 1-5, which is characterized in that
The rated power of second motor is less than the rated power of the first motor.
9. electric vehicle according to any one of claims 1-5, which is characterized in that further include:
Climb and fall detector, on the vehicle body of the electric vehicle, the climb and fall detector and the first motor and described
Second motor is connected, and the climb and fall detector is used to obtain the climb and fall state of the electric vehicle,
Wherein, when the electric vehicle is upward slope state, the first motor and/or second motor are adjusted to driving mould
Formula；When the electric vehicle is descending state, the first motor and/or second motor are adjusted to braking mode.
10. the electric vehicle according to any one of claim 2-5, which is characterized in that
The load cell includes any one in pressure sensor and range sensor.
11. a kind of Dual-motors Driving method of electric vehicle is used for electric vehicle of any of claims 1-10, feature
It is, comprising:
Obtain the load of electric vehicle；
Judge whether the load is greater than default load；
If so, the first motor that starting is connected with gearbox；
If it is not, the second motor that starting is connected with transmission shaft.
12. the Dual-motors Driving method of electric vehicle according to claim 11, which is characterized in that
When the load is greater than the default load, further includes:
Obtain the road grade where the electric vehicle；
Judge whether the road grade is greater than the default gradient；
If it is not, keeping starting the first motor；
If so, restarting second motor, to increase the torque of the electric vehicle.
13. the Dual-motors Driving method of electric vehicle according to claim 12, which is characterized in that " starting and the speed change
The connected first motor of case " specifically includes:
When the electric vehicle is in upward slope state, start the drive mode of the first motor；
When the electric vehicle is in descending state, start the braking mode of the first motor；
" second motor that starting is connected with transmission shaft " specifically includes:
When the electric vehicle is in upward slope state, start the drive mode of second motor；
When the electric vehicle is in descending state, start the braking mode of second motor；
" the restarting second motor " specifically includes:
When the electric vehicle is in upward slope state, start the drive mode of second motor；
When the electric vehicle is in descending state, start the braking mode of second motor.
14. the Dual-motors Driving method of electric vehicle according to claim 12, which is characterized in that " restart institute described
State the second motor " after, further includes:
Keep the gear of the gearbox of the electric vehicle constant.
15. the Dual-motors Driving method of electric vehicle described in any one of 0-14 according to claim 1, which is characterized in that
The rated power of the first motor is greater than the rated power of second motor.
16. the Dual-motors Driving method of electric vehicle described in any one of 0-14 according to claim 1, which is characterized in that
The load includes any one in goods weight or measurement of cargo on the electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320356.8A CN109228888A (en) | 2018-11-07 | 2018-11-07 | The Dual-motors Driving method of electric vehicle and electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320356.8A CN109228888A (en) | 2018-11-07 | 2018-11-07 | The Dual-motors Driving method of electric vehicle and electric vehicle |
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| CN109228888A true CN109228888A (en) | 2019-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572442A (en) * | 2020-12-22 | 2021-03-30 | 南京航空航天大学 | Dual-motor coupling driving device of pure electric vehicle and slope-stopping control method of dual-motor coupling driving device |
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