CN109080442A - A kind of extended-range electric vehicle four-wheel drive system and its control method - Google Patents
A kind of extended-range electric vehicle four-wheel drive system and its control method Download PDFInfo
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- CN109080442A CN109080442A CN201810936692.9A CN201810936692A CN109080442A CN 109080442 A CN109080442 A CN 109080442A CN 201810936692 A CN201810936692 A CN 201810936692A CN 109080442 A CN109080442 A CN 109080442A
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The present invention relates to a kind of extended-range electric vehicle four-wheel drive system and its control methods, the system is specifically provided with range extender system, external clutch and rear motor controller, range extender system is connect by external clutch with preposition retarder, rear motor controller is successively connect with rear centrally-mounted driving and postposition retarder, range extender system includes generator, engine controller, engine, engine controller, inscribed clutch and distance increasing unit controller, wherein generator is connect by external clutch with preposition retarder, engine and generator are connected by inscribed clutch, the distance increasing unit controller distance increasing unit controller simultaneously that is connected respectively with engine controller and engine controller connect and is connect with entire car controller and is controlled by it, rear motor controller is connect with entire car controller, power battery is separately connected generator control Device and rear motor controller processed, this system improve the power performance and capacity usage ratio of electric vehicle, also increase continual mileage.
Description
Technical field
The present invention relates to electric vehicle technical fields, and in particular to a kind of extended-range electric vehicle four-wheel drive system and its control
Method.
Background technique
Pure electric vehicle drives wheel in such a way that the electric energy stored in by power battery is supplied to driving motor, possesses
Dynamic performance superiority, zero-emission, free of contamination advantage, have obtained extensive development at present.But since power battery is easy to aging and
Therefore the problems such as power battery capacity is easily decayed under low temperature, has so that the course continuation mileage of pure electric vehicle is significantly restrained
The electric vehicle (i.e. extended-range electric vehicle) of auxiliary power unit comes into being, it both had pure electric vehicle structure it is simple,
The stronger advantage of power, and the shortcomings that compensate for pure electric vehicle insufficient driving range to a certain extent, therefore study and increase journey
Formula electric vehicle becomes one of the important research direction of new-energy automobile research field.
Although common extended-range electric vehicle driving control system and its control strategy can be with reference to including power at this stage
Including battery remaining power (SOC), torque, demand power, speed, oil consumption etc. major parameter implementation pattern switching, but its
While realizing extending driving range, reduce oil consumption, promote driver comfort, the weight to electric vehicle driveability is had ignored
Depending on, in addition when Acceleration of starting mode or superpower acceleration mode continual mileage can be greatly decreased, so extended-range electric vehicle is dynamic
There are also very big room for promotion, extended-range electric vehicle four-wheel drive system layout also needs to be improved power performance, and control strategy is not yet
It is enough complete, it is badly in need of further research and improves.
Summary of the invention
The continual mileage when present invention is directed to poor electrical vehicular power performance existing in the prior art, Acceleration of starting mode
Be greatly decreased, the defects of system control strategy is incomplete, provides a kind of extended-range electric vehicle four-wheel drive system, which passes through
Rationally setting system layout structure the range extender system of specific structure connect with preposition retarder respectively and with control postposition
The rear motor controller of driving motor connects, and efficiently uses range extender system as vehicle and provides necessary power output, and
The switching of operating mode, knot are quickly and efficiently carried out to the reasonable control of range extender system and other systems using entire car controller
Structure is simple, configuration is innovated, it is convenient to control, and substantially increases the power performance and capacity usage ratio of electric vehicle, increases driving
Mileage.The invention also provides a kind of extended-range electric vehicle four-wheel drive system control methods.
Technical scheme is as follows:
A kind of extended-range electric vehicle four-wheel drive system, including entire car controller, power battery, battery management system, postposition
Driving motor, preposition retarder and postposition retarder, the battery management system are separately connected power battery and entire car controller,
The system further includes range extender system, external clutch and rear motor controller, before the range extender system is positioned close to
It the position of bridge and is connect by external clutch with preposition retarder and provides power, the rear motor control for preposition retarder
Device processed successively connect with rear centrally-mounted driving and postposition retarder and then provides power, the range extender system for postposition retarder
Including generator, engine controller, engine, engine controller, inscribed clutch and distance increasing unit controller, the power generation
Machine is connect by external clutch with preposition retarder, and the engine and generator are connected by inscribed clutch, the increasing
Journey device controller is connected in turn with the engine controller of the engine controller of control engine and control generator respectively
It controls the working condition of engine and generator respectively while distance increasing unit controller connect and connects with the entire car controller outward
By the control of entire car controller, the rear motor controller connect with the entire car controller and receives the control of entire car controller
System, the power battery are separately connected engine controller and rear motor controller.
The extended-range electric vehicle four-wheel drive system further includes the data pick-up of the corresponding duty parameter of several acquisitions, each number
It is connected with entire car controller according to sensor, each multinomial duty parameter of data pick-up collection analysis of vehicle control unit controls
Whole system progress operating mode switching is controlled by pattern switching control strategy according to the demand of different operating conditions afterwards and formulates phase
Answer power allocation strategy.
The duty parameter of data pick-up collection analysis includes but is not limited to that electric vehicle current vehicle speed, power battery are current
Residual capacity, gas pedal aperture, brake pedal signal and vehicle slip rate pass through root after the joint matching of every duty parameter
Operating mode switching is carried out according to the demand control whole system of different operating conditions.
The pattern switching control strategy are as follows: the entire car controller controls engine controller by distance increasing unit controller
Control the working condition of engine and generator in turn with engine controller, while the entire car controller passes through battery management
The working condition of centrally-mounted driving after system controls the working condition of power battery and controlled by rear motor controller, into
And it controls whole system and carries out operating mode switching and formulate corresponding power allocation strategy.
Before the operating mode includes but is not limited to stopping for charging mode, most forces fast mode, pure electric 4 wheel driven mode, pure electricity
Drive mode, increases journey drive mode, cruise drive mode, energy recuperation mode at pure electric rear-guard mode.
It is a kind of for controlling the control method of extended-range electric vehicle four-wheel drive system as described above, specifically include following steps
It is rapid:
Step A, advanced action edge battery current remaining capacity value judgement, when it is less than charging limit value, cutting power is defeated
Out, into stopping for charging mode, entire car controller is controlled to transmission control signal inside range extender system via distance increasing unit at this time
Device is sent to engine controller and engine controller, and control generator enters after engine controller receives control signal
Power generation mode, while engine controller receives and controls engine start after controlling signal, the kinetic energy of generation turns through generator
Changing to electric energy is power battery charging；It is greater than charging limit value in power battery current remaining capacity value and is greater than electric energy abundance limit value
When, execute step B；When power battery current remaining capacity value is greater than charging limit value and is less than electric energy abundance limit value, step is executed
Rapid C；
Step B carries out the judgement of gas pedal opening value, when it is greater than pure electric 4 wheel driven limit value, switches to or is maintained at most
Force fast mode, range extender system and power battery are provided which power at this time, and engine controller is received to be controlled by distance increasing unit
The kinetic energy that control engine generates after the control signal that device transmitting comes is transferred to generator through inscribed clutch, and power battery is in electricity
The electric energy exported under the control of pond management system controls generator with after through engine controller and rear motor controller respectively
Centrally-mounted driving enters working condition, and the electric energy for flowing through generator is converted into after kinetic energy to be provided with range extender system internal engine
Kinetic energy combine and be transferred to front-wheel through preposition retarder jointly, centrally-mounted driving is by conversion after another part electric energy then drives
Kinetic energy is transferred to rear-wheel through postposition retarder；When gas pedal opening value is less than pure electric 4 wheel driven limit value, switches to or be maintained at
Pure electricity 4 wheel driven mode, vehicle power is provided by power battery completely at this time, and power battery is defeated under the control of battery management system
Electric energy out controls generator centrally-mounted driving moving conversion with after through engine controller and rear motor controller respectively
It can be transferred to front-wheel through preposition retarder and be transferred to rear-wheel through postposition retarder；
Step C carries out the judgement of gas pedal opening value, when it is greater than front and back and drives limit value, switches to or be maintained at pure electricity
Rear-guard mode, vehicle power is provided by power battery completely at this time, what power battery exported under the control of battery management system
The kinetic energy of conversion is transferred to rear-wheel through postposition retarder by electric energy centrally-mounted driving after the control of rear motor controller；In throttle
When pedal opening value is less than front and back drive limit value, pure electric forerunner's mode is switched to or is maintained at, vehicle power is completely by power at this time
Battery provides, and the electric energy that power battery exports under the control of battery management system will turn through engine controller control generator
The kinetic energy of change is transferred to front-wheel through preposition retarder.
In the step C of the control method, it can be judged with advanced action edge battery current remaining capacity value, in power battery
When current remaining capacity value is greater than increasing degree value, then gas pedal opening value judgement is carried out, executes pure electric rear-guard mode or pure electricity
Forerunner's mode；The size for increasing degree value is between charging limit value and electric energy abundance limit value, in power battery current residual
It when capability value is less than increasing degree value, switches to and increases journey drive mode, pass through engine at this time and power is provided and power battery is mended
Charging energy, battery management system transmit power battery not enough power supply signal to entire car controller, and entire car controller feedback stopping is put
Electricity instruction, distance increasing unit controller after receiving the work order that entire car controller is sent, while control engine controller and
Generator and engine is respectively started in engine controller, and the kinetic energy that engine generates is converted into electric energy through generator, a part
It flows to power battery and carries out power battery charging, centrally-mounted driving opens after another part flows to rear motor controller and then controls
Transmitting kinetic energy is transferred to rear-wheel via postposition retarder and realizes driving after dynamic.
In the step C of the control method, after switching to or being maintained at pure electric forerunner's mode, vehicle slip rate is also carried out
Judgement first switches to pure electric rear-guard mode, if vehicle slip rate is still greater than cunning on this basis when it is greater than slip rate limit value
Shifting rate limit value then further switches to pure electric 4 wheel driven mode；It switching to or is being maintained at pure electric rear-guard mode, increasing journey drive mode
Afterwards, the judgement of vehicle slip rate is also carried out, when it is greater than slip rate limit value, then further switches to pure electric 4 wheel driven mode.
The control method can also include step D, carry out the judgement of electric vehicle current vehicle speed, at it more than or equal to speed
When limit value, cruise drive mode is switched to or kept, provide power by the engine of range extender system at this time and utilizes power generation
Machine realizes that energy is converted into power battery and charges, and engine and generator enter after receiving the signals of corresponding controllers respectively
Working condition, the kinetic energy that engine generates are transferred to generator through inscribed clutch, and being on the one hand converted into electric energy is power battery
On the other hand charging is transferred to front-wheel by machine driving and realizes driving.
In the step D of the control method, it is less than speed limit value in electric vehicle current vehicle speed and is returned more than or equal to energy
When receiving limit value, step E is executed；
Step E switches to or keeps energy recuperation mode, at this point, entire car controller is electric to distance increasing unit controller and postposition
Machine controller sends relevant work instruction, so that the engine controller controls engine inside range extender system is in and closes shape
State, engine controller then control generator and enter power generation mode, and front-wheel kinetic energy is transmitted through preposition retarder and external clutch
Power battery interior is supplemented to through engine controller to generator to be converted into electric energy；Rear-wheel kinetic energy is also through postposition retarder
It flows through rear centrally-mounted driving and is converted into electric energy and be supplemented to power battery interior through rear motor controller again, filled for power battery
Electricity.
Technical effect of the invention is as follows:
The present invention relates to a kind of extended-range electric vehicle four-wheel drive system, by will include generator, engine controller,
Engine, engine controller, inscribed clutch connect the increasing journey using specific structure with distance increasing unit controller and each component
Device system connect with preposition retarder respectively and connect with the rear motor controller of centrally-mounted driving after control, reasonably,
It is innovatively provided with system layout structure, range extender system is efficiently used as vehicle and necessary power output is provided, and increasing
In journey device system, generator is connected to become range extender system by external clutch and preposition retarder and extraneous component transmitting is dynamic
The necessary channel of power and energy, on the one hand pass through engine controller and engine controller controls hair to distance increasing unit controller respectively
The working condition of motivation and generator, another aspect distance increasing unit controller will also receive the control of entire car controller, thus constitute
Multilayer effectively controls, and power battery is separately connected engine controller and rear motor controller can pass electric energy respectively
Bridge and rear axle are respectively formed front energy flow channel and rear portion energy flow channel and front energy flow canal in turn before transporting to
Road and rear portion energy flow channel cooperating recycle entire car controller to distance increasing unit controller, battery management system, postposition
The reasonable control of electric machine controller can quickly and efficiently realize required operating mode under different operating conditions from cooperation
Switching, structure is simple, configuration is innovated, it is convenient to control, and substantially increases the power performance and capacity usage ratio of electric vehicle, simultaneously
Also greatly increase continual mileage.
Further, extended-range electric vehicle four-wheel drive system further includes the data sensor of the corresponding duty parameter of several acquisitions
Device, each data pick-up is connected with entire car controller so that each multinomial work of data pick-up collection analysis of vehicle control unit controls
Whole system is controlled by pattern switching control strategy according to the demand of different operating conditions after condition parameter and carries out operating mode switching simultaneously
Formulate corresponding power allocation strategy, i.e., using entire car controller it is integrated coordinate and optimal control range extender system and power battery and
The power of other systems distributes, and more optimizes the power performance of electric vehicle, it might even be possible to make electric vehicle work most
Good power performance can also extend the service life of electric vehicle and the driving experience of promotion driver by optimizing power performance；
And the duty parameter of data pick-up collection analysis preferably includes electric vehicle current vehicle speed, power battery current residual is held
Amount, gas pedal aperture, brake pedal signal and vehicle slip rate etc. multiple parameters, especially newly introduce vehicle slip rate
Parameter, and the demand control whole system after the joint matching by every duty parameter further according to different operating conditions is needed to carry out work
Operation mode switching, can make switching more accurate, more efficient.
Further, the operating mode of system includes but is not limited to stopping for charging mode, most forces fast mode, pure electric 4 wheel driven
Mode, pure electric rear-guard mode, increases journey drive mode, cruise drive mode, energy recuperation mode, various works at pure electric forerunner's mode
Operation mode is matched with corresponding power allocation strategy, and the preferable power corresponding to current working can be provided for electric vehicle
Output performance, so that the whole work efficiency of electric vehicle and capacity usage ratio are all effectively improved.
The invention further relates to a kind of for controlling the control method of above-mentioned extended-range electric vehicle four-wheel drive system, passes through
Power battery current remaining capacity value is made comparisons with charging limit value and electric energy abundance limit value respectively, realization switches into parking and fills
Power mode or again row judgement further make comparisons gas pedal opening value with pure electric 4 wheel driven limit value, and realization switches into
Most force fast mode or enter pure electric 4 wheel driven mode, gas pedal opening value is further driven into limit value with front and back and is made comparisons,
Realization switches into pure electric rear-guard mode or pure electric forerunner's mode, can also be according to the ratio of design parameter current value and corresponding limit value
Relatively result goes to realize the switching control of multiple-working mode, and reasonably optimizing control method makes the control method more to suit specific feelings
Condition and stronger specific aim is provided with to different operating conditions, is thus truly realized to be controlled according to the actual demand of different operating conditions and increases journey
Generator and engine, power battery and rear centrally-mounted driving in device system respectively enter different working conditions and then control
Entire four-wheel drive system carries out corresponding operating mode switching, in the case where electric vehicle can be allowed to increase journey, so that control work
Pattern switching is more efficiently convenient, while also greatly improving electrical vehicular power performance.
Further, small due to being likely to occur traction in operating conditions such as upward slope, acceleration in electric vehicle driving process
In the driving force the case where, therefore it is likely to occur wheel slip phenomenon, so that vehicular drive capability is limited.In all working mode,
Vehicle 4 wheel driven mode activated performance is most strong, and then to compare forerunner's mode activated performance stronger for vehicle rear-guard mode, thus works as 4 wheel driven
After system (or drive system) has been introduced into certain operating mode (for example having switched or be maintained at pure electric forerunner's mode),
Can also carry out vehicle slip rate judgement, by vehicle slip rate controlled compared with the judgement of slip rate limit value electric vehicle into
Row pattern switching switches into the operating mode for meeting actual condition demand to further realize, in due course switching working mode with
The attachment coefficient for being more conducive to keep vehicle run stability is provided.
Further, can also be carried out in the judgement comparison procedure for carrying out current vehicle speed and speed limit value current vehicle speed with
The judgement of energy regenerating limit value is compared, and can be realized drive system into energy recuperation mode, at this time can be power battery
It charges, can make it possible to measure while promoting drive system power performance to recycle so as to subsequent other work of progress
It is recycled when mode, greatly improves capacity usage ratio.
Detailed description of the invention
A kind of Fig. 1: preferred structure figure of extended-range electric vehicle four-wheel drive system of the present invention.
Fig. 2: the present invention is a kind of for controlling the preferred flow charts of the control method of extended-range electric vehicle four-wheel drive system.
Fig. 3: the power distribution diagram under stopping for charging mode.
Fig. 4: the control strategy figure under stopping for charging mode.
Fig. 5: most force the power distribution diagram under fast mode.
Fig. 6: most force the control strategy figure under fast mode.
Fig. 7: the power distribution diagram under pure electricity 4 wheel driven mode.
Fig. 8: the control strategy figure under pure electricity 4 wheel driven mode.
Fig. 9: the power distribution diagram under pure electricity rear-guard mode.
Figure 10: the control strategy figure under pure electricity rear-guard mode.
Figure 11: the power distribution diagram under pure electricity forerunner's mode.
Figure 12: the control strategy figure under pure electricity forerunner's mode.
Figure 13: increase the power distribution diagram under journey drive mode.
Figure 14: increase the control strategy figure under journey drive mode.
Figure 15: the power distribution diagram under cruise drive mode.
Figure 16: the control strategy figure under cruise drive mode.
Figure 17: the power distribution diagram under energy recuperation mode.
Figure 18: the control strategy figure under energy recuperation mode.
Each label lists as follows in figure:
1- range extender system；The external clutch of 2-；3-preposition retarders；4-power batteries；5- battery management system
System；6- entire car controller；7- rear motor controller；Centrally-mounted driving after 8-；9- postposition retarder；
11-generators；12-engine controllers；13-engines；14-engine controllers；15-inscribed clutches
Device；16-distance increasing unit controllers.
Specific embodiment
The present invention relates to a kind of extended-range electric vehicle four-wheel drive systems, including entire car controller, power battery, cell tube
Reason system, rear centrally-mounted driving, preposition retarder and postposition retarder, battery management system are separately connected power battery and vehicle
Controller, the extended-range electric vehicle four-wheel drive system further include range extender system, external clutch and rear motor controller, and
Range extender system specifically includes generator, engine controller, engine, engine controller, inscribed clutch and distance increasing unit
Range extender system is positioned close to the position of preceding bridge and is connect by external clutch with preposition retarder by controller, the present invention
And then for preposition retarder provide power, by the range extender system of specific structure is connect with preposition retarder respectively and with
The rear motor controller connection of centrally-mounted driving after control, reasonably, is innovatively provided with system layout structure, effective use
Range extender system provides necessary power output for vehicle, and using entire car controller to range extender system and other systems
Rationally control quickly and efficiently carries out the switching of operating mode, and structure is simple, configuration is innovated, it is convenient to control, and can effectively improve
The power performance and capacity usage ratio of electric vehicle, while also greatly increasing continual mileage.
The present invention is described in detail with reference to the accompanying drawing.
The present invention relates to a kind of extended-range electric vehicle four-wheel drive system, preferred structures as shown in Figure 1, specifically in addition to including
Preposition retarder 3, power battery 4, entire car controller 6, connection power battery 4 and entire car controller 6 battery management system 5,
It further include range extender system 1, external clutch 2 and rear motor controller afterwards other than centrally-mounted driving 8 and postposition retarder 9
7, the range extender system 1 is constructed and is positioned close to based on heat engine formula power source the position of preceding bridge and by external clutch 2
Connect with preposition retarder 3 and provide power for preposition retarder 3, rear motor controller 7 successively with rear centrally-mounted driving 8 and
Postposition retarder 9 connects and then provides power for postposition retarder 9, and range extender system 1 further comprises generator 11, power generation
Machine controller 12, engine 13, engine controller 14, inscribed clutch 15 and distance increasing unit controller 16, the generator 11
Range extender system 1 and extraneous component, which are connected to become, by external clutch 2 and preposition retarder 3 transmits the necessary of power and energy
Channel, the engine 13 and generator 11 are connect by inscribed clutch 15, the distance increasing unit controller 16 respectively with control
The engine controller 14 of engine 13, which is connected and then controls respectively with the engine controller 12 of control generator 11, to be started
The working condition of machine 13 and generator 11, while distance increasing unit controller 16 connect and receives whole with the entire car controller 6 outward
The control of vehicle controller 6, rear motor controller 7 connect with the entire car controller 6 and receive the control of entire car controller 6,
Specifically, entire car controller 6 is respectively connected to the distance increasing unit of range extender system 1 by control signal wire (fine line as shown in the figure)
Controller 16, control power battery 4 battery management system 5 and control after centrally-mounted driving 8 rear motor controller 7 into
And realize the control respectively to each component, and the battery management system 5 is acquired again by control signal wire, controls and managed
The status information of power battery 4 is managed, the power battery 4 is separately connected engine controller 12 and rear motor controller 7, has
Body shows as the power battery 4 and is connected to inside range extender system 1 all the way by power power-line (heavy line as shown in the figure)
Engine controller 12 so that be connected to generator 11 simultaneously another way by rear motor controller 7 be connected to postposition driving
Motor 8 is can be transmitted separately to preceding bridge and rear axle for electric energy and then be respectively formed front energy flow channel and rear portion energy stream
Dynamic channel and front energy flow channel and rear portion energy flow channel cooperating, the present invention will be by that will use specific structure
Range extender system 1 connect with preposition retarder 3 respectively and connect with the rear motor controller 7 of centrally-mounted driving 8 after control
Reasonably, it innovatively, is optimally provided with the layout structure and connection type of drive system, range extender system can be efficiently used
1 provides necessary power output for vehicle, and in range extender system 1,16 one side of distance increasing unit controller passes through engine
Controller 14 and engine controller 12 control the working condition of engine 13 and generator 11, another aspect distance increasing unit control respectively
Device 16 processed will also receive the control of entire car controller 6, thus constitute multilayer and effectively control, and recycle 6 pairs of entire car controller increasings
Journey device controller 16, battery management system 5, the reasonable control of rear motor controller 7 and cooperation can be quickly and efficiently
Realize the switching of required operating mode under different operating conditions, this system structure is simple, configuration is innovated, it is convenient to control, and mentions significantly
The high power performance and capacity usage ratio of electric vehicle, while also greatly increasing continual mileage.
Further, extended-range electric vehicle four-wheel drive system further includes the data pick-up of the corresponding duty parameter of several acquisitions
(not shown), each data pick-up are connected with entire car controller 6, and the entire car controller 6 controls each data pick-up
The control of pattern switching control strategy is passed through to the actual demand of power performance according to different operating conditions after the multinomial duty parameter of collection analysis
Whole system processed carries out operating mode switching and formulates corresponding power allocation strategy, i.e., coordinates simultaneously using entire car controller 6 is integrated
Optimal control range extender system 1 and the distribution of power battery 4 and the power of other systems, that is, execution pattern switching control plan
Slightly, in conjunction with attached drawing 1, the pattern switching control strategy is to be controlled using the entire car controller 6 by distance increasing unit controller 16
Engine controller 14 and engine controller 12 processed control engine 13 in turn and generator 11 enters different working conditions,
The working condition of power battery 4 is controlled by battery management system 5 using entire car controller 6 and is led to using entire car controller 6
Later the working condition of centrally-mounted driving 8 after electric machine controller 7 controls is set, and then controls whole system and carries out operating mode switching
And corresponding power allocation strategy is formulated, it can more optimize the power performance of electric vehicle, it might even be possible to make electric vehicle
Work is in best power source performance, additionally it is possible to which by optimizing, power performance reaches the service life for extending electric vehicle and promotion drives
The good result of the driving experience of person；The multinomial duty parameter of data pick-up collection analysis specifically may include electric vehicle
Current vehicle speed, power battery current remaining capacity, gas pedal aperture, brake pedal signal and vehicle slip rate etc. multinomial ginseng
Number, wherein in order to obtain tire maximum longitudinal and additional forces, while keeping biggish lateral adhesion coefficient, need vehicle is sliding
Shifting rate controls near the corresponding slip rate of peak adhesion coefficient, and especially compared to traditional control strategy, the present invention newly draws
Entered vehicle slip rate parameter and carried out Optimization Work pattern switching control strategy so that control switching foundation more it is accurate with can
Lean on, driveability is more promoted, and the present invention needs after the joint matching by every duty parameter further according to different operating conditions
Actual demand come control whole system carry out operating mode switching, switching result can be made more accurate, more efficient.
Further, the operating mode of system includes but is not limited to stopping for charging mode, most forces fast mode, pure electric 4 wheel driven
Mode, pure electric rear-guard mode, increases journey drive mode, cruise drive mode, energy recuperation mode, various works at pure electric forerunner's mode
Operation mode is matched with corresponding power allocation strategy, and the preferable power corresponding to current working can be provided for electric vehicle
Output performance effectively increases the whole work efficiency and capacity usage ratio of electric vehicle.
The invention further relates to a kind of for controlling the control method of above-mentioned extended-range electric vehicle four-wheel drive system, described
Control method includes the corresponding pattern switching control strategy of each operating mode and formulates for each operating mode corresponding
Power allocation strategy is exactly to control engine controller and generator control by distance increasing unit controller using entire car controller
Device and then the working condition for controlling engine and generator, while power is controlled by battery management system using entire car controller
The working condition of battery and after being controlled by rear motor controller centrally-mounted driving working condition, and then control entire system
System carries out operating mode switching and formulates corresponding power allocation strategy, so corresponding power is corresponding under every kind of operating mode
Distribution diagram (it can be appreciated that energy flow route map) and control strategy figure, attached drawing 2 are that corresponding one kind of the present invention is used for
The preferred flow charts for controlling the control method of extended-range electric vehicle four-wheel drive system, in conjunction with shown in attached drawing 2, this method is in acquisition electricity
Motor-car current vehicle speed, power battery current remaining capacity SOC, gas pedal aperture, brake pedal signal and vehicle slip rate
On the basis of specifically includes the following steps:
Step A, the judgement of advanced action edge battery current remaining capacity SOC value, when it is less than charging limit value, specially
When power battery current remaining capacity SOC value < charging limit value S1 (limit value that S1 is the corresponding minimum SOC of stopping for charging mode)
Illustrate that power battery current remaining capacity SOC deficiency needs to charge, power output is cut off, into stopping for charging mode, in conjunction with such as
Attached corresponding power distribution diagram shown in Fig. 3 and control strategy figure as shown in Figure 4, entire car controller 6 is to distance increasing unit system at this time
1 inside of system sends control signal, is sent to engine controller 14 and engine controller 12 via distance increasing unit controller 16, sends out
Control generator 11 enters power generation mode after electric machine controller 12 receives control signal, while engine controller 14 receives
Control engine 13 starts after controlling signal, and the kinetic energy of generation is converted to electric energy through generator 11 as the charging of power battery 4；Dynamic
Power battery current remaining capacity SOC value is greater than charging limit value S1 and (electric energy abundance limit value S2 > fills greater than electric energy abundance limit value S2
Electric limit value S1) when, illustrate power battery at this time can be used to provide driving electric energy it is sufficient, execute step B；It is current in power battery
Residual capacity SOC value is greater than charging limit value S1 and is less than electric energy abundance limit value S2 (electric energy abundance limit value S2 > charging limit value S1)
When, execute step C；
Step B carries out the judgement of gas pedal opening value, at it greater than pure electricity 4 wheel driven limit value K1 (when there are throttle signal)
When, vehicle accelerates demand higher, due to most strong, followed by pure electricity of most forcing fast mode accelerating ability in aforementioned several operating modes
4 wheel driven mode most forces fast mode so switching to or being maintained at this time, in conjunction with corresponding power distribution diagram as shown in Fig. 5
With control strategy figure as shown in FIG. 6, range extender system 1 and power battery 4 are provided which power at this time, are embodied in distance increasing unit
Engine 13 inside system 1 enters working condition and power battery 4 provides power, entire car controller 6 and battery management together
System 5, range extender system 1 and rear motor controller 7 communicate and send corresponding work order, and range extender system 1 provides power
Part: the distance increasing unit controller 16 inside range extender system 1 receives information and then simultaneously to engine controller 14 and generator
Controller 12 send work order, at this time engine controller 14 receive by distance increasing unit controller 16 transmit Lai control signal
Control engine 13 enters operating mode afterwards, and the kinetic energy that engine 13 generates is transferred to generator 11 through inscribed clutch 15；It is dynamic
Power battery 4 provides power section: the electric energy that power battery 4 exports under the control of battery management system 5 is through engine controller
12 and rear motor controller 7 is transferred to generator 11 and rear centrally-mounted driving 8 control generator 11 respectively and postposition driving is electric
Machine 8 enters working condition, and the electric energy that flows through generator 11, which is converted into, to be provided with 1 internal engine 13 of range extender system after kinetic energy
Kinetic energy, which combines, is transferred to front-wheel through preposition retarder 3 jointly, and centrally-mounted driving 8 is by conversion after another part electric energy then drives
Kinetic energy is transferred to rear-wheel through postposition retarder 9, realizes 4 wheel driven and increases engine as a source of power on the basis of 4 wheel driven
And then it realizes output power and reaches maximum and most force fast mode.It is less than pure electric 4 wheel driven limit value K1 in gas pedal opening value
When (when there are throttle signal), operating mode switches to or is maintained at pure electric 4 wheel driven mode, in conjunction with as shown in Fig. 7 corresponding
Power distribution diagram and control strategy figure as shown in Figure 8, vehicle power is provided and distance increasing unit system by power battery 4 completely at this time
Engine 13 inside system 1 does not provide power, entire car controller 6 and battery management system 5, range extender system 1 and rear motor
Controller 7 communicates and sends corresponding work order, and the electric energy that power battery 4 exports under the control of battery management system 5 is through sending out
Electric machine controller 12 and rear motor controller 7 controls generator 11 respectively and rear centrally-mounted driving 8 is premenstrual by the kinetic energy of conversion
It sets retarder 3 to be transferred to front-wheel and be transferred to rear-wheel through postposition retarder 9, it is also understood that transmitting power for power battery
To former and later two electric machine controllers (engine controller 12 and rear motor controller 7), generator 11 and postposition are respectively driven
Driving motor 8 is thus by power simultaneous transmission to front and back wheel wheel (preceding bridge and rear axle)；
Step C carries out the judgement of gas pedal opening value, is greater than front and back at it and drives limit value K2 (K2 < K1, there are throttle letters
Number when) when, pure electric rear-guard mode is switched to or is maintained at, in conjunction with corresponding power distribution diagram as of fig. 9 shown and such as Figure 10
Shown in control strategy figure, vehicle power is provided by power battery 4 completely at this time, and 1 internal engine 13 of range extender system does not mention
For power, 6 one side of entire car controller is communicated with battery management system 5, so that power is exported by power battery 4, on the other hand
It is communicated with rear motor controller 7, the electric energy that power battery 4 exports under the control of battery management system 5 is through rear motor control
The kinetic energy of conversion is transferred to rear-wheel through postposition retarder 9 and realizes driving by centrally-mounted driving 8 after device 7 processed controls；In gas pedal
When opening value is less than front and back drive limit value K2 (K2 < K1, when there are throttle signal), pure electric forerunner's mode is switched to or is maintained at,
In conjunction with corresponding power distribution diagram as shown in Fig. 11 and control strategy figure as shown in figure 12, at this time vehicle power completely by
Power battery 4 provides, and 1 internal engine of range extender system does not provide power, and entire car controller 6 and battery management system 5 communicate
Send work order, control 4 electric power of power battery output, on the other hand, since the characteristics of configuration of the present invention is that front-wheel provides drive
When power, power must drive generator 11 and external 2 knot of clutch by the engine controller 12 inside range extender system 1
Conjunction can just be transmitted to preceding bridge, therefore entire car controller 6 is also communicated with distance increasing unit controller 16 at this time, further to control the generator
Controller 12 works, and the electric energy that power battery 4 exports under the control of battery management system 5 is controlled through engine controller and generated electricity
The kinetic energy of conversion is transferred to front-wheel through preposition retarder by machine, and the power that pure electricity forerunner's mode provides is provided than pure electric rear-guard mode
Power it is small.
To sum up, the controlling party for being used to control above-mentioned extended-range electric vehicle four-wheel drive system including above-mentioned steps A, B, C
Method is mainly the switching for carrying out being gone to realize multiple-working mode according to the current value of design parameter and the comparison result of corresponding limit value
Control, reasonably optimizing control method make control method more suit concrete condition and are provided with stronger needle to different operating conditions
To property, it is thus truly realized the generator and engine, power controlled in range extender system according to the actual demand of different operating conditions
Battery and rear centrally-mounted driving, which respectively enter different working conditions and then control entire four-wheel drive system, carries out corresponding Working mould
Formula switching so that control switching is more efficiently convenient, while also greatly improving electrical vehicular power performance.
When electric energy abundance limit value S2 is not achieved in power battery current remaining capacity SOC, 4 electric energy of power battery is used to provide
Driving force size not as good as aforementioned both of which (most forcing fast mode and pure electric 4 wheel driven mode), then have to take the second best and select pure electricity
Forerunner or pure electric rear-guard mode, wherein the driving force that pure electricity rear-guard mode can be provided is greater than pure electric forerunner's mode.It is right at this time
Power battery current remaining capacity SOC continues to determine, that is to say, that it is further preferred that in embodiment as shown in Figure 2 preferably
Ground can be judged, in power battery current remaining capacity in step C with advanced action edge battery current remaining capacity SOC value
SOC value be greater than increase degree value S3 (it is described increase degree value S3 size between charging limit value S1 and electric energy abundance limit value S2 between, i.e.,
Electric energy abundance limit value S2 > increases degree value S3 > charging limit value S1) when, then gas pedal opening value judgement is carried out, after executing pure electricity
Drive mode or pure electric forerunner's mode drive limit value K2 (K2 < K1, there are throttle signals when gas pedal opening value is greater than front and back
When) when, pure electric rear-guard mode is switched to or is maintained at, (K2 < K1, is being deposited when gas pedal opening value is less than front and back drive limit value K2
In throttle signal) when, switch to or be maintained at pure electric forerunner's mode；It is less than in power battery current remaining capacity SOC value and increases
When degree value S3 (electric energy abundance limit value S2 > increases degree value S3 > charging limit value S1), only it is difficult to provide ideal by power battery
Working effect, so need to switch to or keep at this time to increase journey drive mode, in conjunction with corresponding power as shown in Fig. 13 point
Figure and control strategy figure as shown in figure 14, provide power by engine 13 at this time for electric vehicle while passing through engine
13 pairs of 4 electric energy supplements of power battery, battery management system 5 transmit power battery not enough power supply signal, vehicle to entire car controller 6
6 feedback of controller stops electric discharge instruction, and power battery 4 will enter charged state, and distance increasing unit controller 16 is receiving vehicle
After the work order that controller 6 is sent, while engine controller 12 and engine controller 14 are controlled, generator is respectively started
11 (generator is made to enter power generation mode) and engine 13, the kinetic energy that engine 13 generates are converted into electric energy through generator 11, and one
Part flows to power battery 4 and carries out the charging of power battery 4, and another part flows to rear motor controller 7 and then controls postposition and drives
Transmitting kinetic energy is transferred to rear-wheel via postposition retarder 9 and realizes driving after dynamic motor 8 starts.
Due to being likely to occur traction less than driving force in operating conditions such as upward slope, acceleration in electric vehicle driving process
Situation, therefore it is likely to occur wheel slip phenomenon, so that vehicular drive capability is limited.In all working mode, vehicle 4 wheel driven mould
Formula driveability is most strong, and then to compare forerunner's mode activated performance stronger for vehicle rear-guard mode, thus when four-wheel drive system (or is driven
Dynamic system) have been introduced into certain operating mode (for example having switched or be maintained at pure electric forerunner's mode) after, can also carry out
The judgement of vehicle slip rate, method as shown in Figure 2 are switching to or are being maintained at pure electric forerunner's mould it is further preferred that in step C
After formula, also progress vehicle slip rate judgement then illustrates longitudinal and additional forces, lateral attached at this time when it is greater than slip rate limit value W
Coefficient deviate ideal range, therefore pure electric rear-guard mode is first switched to, if vehicle slip rate is still greater than sliding on this basis
Rate limit value W then further switches to pure electric 4 wheel driven mode；Similarly, it switching to or is being maintained at pure electric rear-guard mode, increasing journey driving
After mode, the judgement of vehicle slip rate is also carried out, when it is greater than slip rate limit value W, then further switches to pure electric 4 wheel driven mode,
By innovatively introducing vehicle slip rate parameter and attachment coefficient, the more accurate comparison of switching can be further realized and sentenced
It is disconnected to provide more efficiently, accurate control foundation in turn for operating mode switching control.
It is also preferable to include step D for method shown in Fig. 2, carry out the judgement of electric vehicle current vehicle speed, at it more than or equal to speed
When limit value U1, cruise drive mode is switched to or keeps, in conjunction with corresponding power distribution diagram as shown in Fig. 15 and such as Figure 16
Shown in control strategy figure, provide power by the engine 13 of range extender system 1 at this time, meanwhile, to improve capacity usage ratio
Realize that energy is converted into power battery 4 and charges using generator 11, engine 13 and generator 11 receive accordingly respectively
Entering working condition after the signal of controller, the kinetic energy that engine 13 generates is transferred to generator 11 through inscribed clutch 15, and one
Aspect is converted into electric energy as the charging of power battery 4, and on the other hand being transferred to front-wheel by machine driving realizes driving, electricity at this time
Motor-car remains biggish travel speed, and the working efficiency of engine is relatively high, and by engine supply generator into
And the operation after energy conversion to power battery charging can greatly improve whole capacity usage ratio, practicability is extremely strong.
Method shown in Fig. 2 it is further preferred that in step D, electric vehicle current vehicle speed be less than speed limit value U1 and
When more than or equal to energy regenerating limit value U2 (energy regenerating limit value U2 < < speed limit value U1), step E can also be performed；
Step E switches to or keeps energy recuperation mode, in conjunction with corresponding power distribution diagram as shown in Fig. 17 and such as
Control strategy figure shown in Figure 18, at this point, entire car controller 6 sends phase to distance increasing unit controller 16 and rear motor controller 7
Work order is answered, so that the engine controller 14 inside range extender system 1 controls engine 13 and is in close state, generator
Controller 12 then controls generator 11 into power generation mode, and front-wheel kinetic energy is transferred to hair through preposition retarder 3 and external clutch 2
Motor 11 is supplemented to inside power battery 4 to be converted into electric energy through engine controller 12；Rear-wheel kinetic energy also slows down through postposition
Device 9 flows through rear centrally-mounted driving 8 (rear motor controller 7 controls it and switchs to power generation mode by drive mode) and is converted into electric energy again
It is supplemented to inside power battery 4 through rear motor controller 7, charges for power battery 4, drive system dynamic property can promoted
It makes it possible to measure to recycle so as to recycling when subsequent other operating modes of progress while energy, greatly improves energy utilization
Rate.
Wheel lock up situation is easy to appear under operating condition of braking, slip rate is more than limit value, wheel attachment coefficient deviation ideal
Region, to influence insensitivity.Therefore also, it is preferred that carrying out slip rate judgement when braking.As shown in Fig. 2, carrying out electric vehicle
When current vehicle speed judges, judge whether it is more than or equal to speed limit value U1, switches to or keep when being judged as YES the case where
Cruise drive mode, i.e. execution step D carry out brake signal (or for brake pedal signal) and sentence when being judged as NO the case where
It is disconnected, and brake signal judgement is also carried out after cruise drive mode.When judgement is there are when brake signal, then electric vehicle is worked as
Preceding speed is compared with energy regenerating limit value U2, that is, judge whether execute step E to switch to or keep energy recuperation mode,
Vehicle slip rate judgement is then carried out when judgement does not execute step E, and under step E energy recuperation mode, it preferably can also be again
The judgement of vehicle slip rate is carried out, when it is greater than slip rate limit value W, then carries out sentencing for power battery current remaining capacity SOC value
It is disconnected, it is greater than in power battery current remaining capacity SOC value and increases degree value S3 (electric energy abundance limit value S2 > increasing degree value S3 > charging
Limit value S1) when, pure electric rear-guard mode is first switched to, if vehicle slip rate is still greater than slip rate limit value W on this basis, into one
Step switches to pure electric 4 wheel driven mode；When power battery current remaining capacity SOC value is less than or equal to increase degree value S3, first switch to
Or keep increasing journey drive mode, and enter increase journey drive mode after can also carry out vehicle slip rate judgement again, be still greater than at it
When slip rate limit value W, then pure electric 4 wheel driven mode is further switched to.
Further, when in step D, it is less than speed limit value U1 in electric vehicle current vehicle speed and is less than energy regenerating and limit
When value U2 (energy regenerating limit value U2 < < speed limit value U1), there are brake signal but not the case where trigger energy take-back model
Under, following steps can also be performed: when vehicle slip rate is greater than slip rate limit value W, the judgement of further progress operating mode, if
Current operation mode is pure electric forerunner's mode, then switches to pure electric rear-guard mode, into pure electric rear-guard mode after further progress
The judgement of vehicle slip rate further switches to pure electric 4 wheel driven mode when vehicle slip rate is still greater than slip rate limit value W；If working as
Preceding operating mode is not pure electric forerunner's mode, continues to carry out current operation mode judgement, if what is further judged is current
Operating mode is pure electric rear-guard mode or increases journey drive mode, then switches to pure electric 4 wheel driven mode.
If not complying with above-mentioned Rule of judgment, electric vehicle current vehicle speed is re-started, power battery current residual is held
The acquisition and acquisition of SOC, gas pedal aperture, brake pedal signal and vehicle slip rate are measured, and then was accordingly judged again
Journey.
It should be pointed out that specific embodiment described above can make those skilled in the art that the present invention be more fully understood
It creates, but do not limit the invention in any way is created.Therefore, although this specification creates the present invention referring to drawings and examples
It makes and has been carried out detailed description, it will be understood by those skilled in the art, however, that still can modify to the invention
Or equivalent replacement, in short, the technical solution and its improvement of all spirit and scope for not departing from the invention, should all contain
It covers in the protection scope of the invention patent.
Claims (10)
1. a kind of extended-range electric vehicle four-wheel drive system, including entire car controller, power battery, battery management system, postposition are driven
Dynamic motor, preposition retarder and postposition retarder, the battery management system are separately connected power battery and entire car controller,
It is characterized in that, further includes range extender system, external clutch and rear motor controller, the range extender system is positioned close to
It the position of preceding bridge and is connect by external clutch with preposition retarder and provides power, the rear motor for preposition retarder
Controller successively connect with rear centrally-mounted driving and postposition retarder and then provides power, the distance increasing unit system for postposition retarder
System includes generator, engine controller, engine, engine controller, inscribed clutch and distance increasing unit controller, the hair
Motor is connect by external clutch with preposition retarder, and the engine and generator are connected by inscribed clutch, described
Distance increasing unit controller is connected with the engine controller of the engine controller of control engine and control generator respectively to be tapped into
And the working condition of engine and generator is controlled respectively distance increasing unit controller is connect simultaneously with the entire car controller outward simultaneously
Receive the control of entire car controller, the rear motor controller connect with the entire car controller and receives entire car controller
Control, the power battery are separately connected engine controller and rear motor controller.
2. extended-range electric vehicle four-wheel drive system according to claim 1, which is characterized in that further include that several acquisitions are corresponding
The data pick-up of duty parameter, each data pick-up are connected with entire car controller, each data of vehicle control unit controls
The entire system of pattern switching control strategy control is passed through according to the demand of different operating conditions after the multinomial duty parameter of sensor collection analysis
System carries out operating mode switching and formulates corresponding power allocation strategy.
3. extended-range electric vehicle four-wheel drive system according to claim 2, which is characterized in that data pick-up collection analysis
Duty parameter include but is not limited to electric vehicle current vehicle speed, power battery current remaining capacity, gas pedal aperture, braking
Pedal signal and vehicle slip rate, by being entirely according to the demand control of different operating conditions after the joint matching of every duty parameter
System carries out operating mode switching.
4. extended-range electric vehicle four-wheel drive system according to claim 3, which is characterized in that the pattern switching controls plan
Slightly: the entire car controller controls engine controller by distance increasing unit controller and engine controller control is started
The working condition of machine and generator, while the entire car controller controls the working condition of power battery by battery management system
And the working condition by centrally-mounted driving after the control of rear motor controller, and then control whole system and carry out operating mode
Switch and formulates corresponding power allocation strategy.
5. the extended-range electric vehicle four-wheel drive system according to one of claim 2 to 4, which is characterized in that the Working mould
Formula includes but is not limited to stopping for charging mode, most forces fast mode, pure electric 4 wheel driven mode, pure electric forerunner's mode, pure electric rear-guard mould
Formula increases journey drive mode, cruise drive mode, energy recuperation mode.
6. it is a kind of for controlling the control method of the extended-range electric vehicle four-wheel drive system as described in one of claim 1 to 5,
It is characterized in that, includes the following steps:
Step A, advanced action edge battery current remaining capacity value judgement cut off power output when it is less than charging limit value, into
Enter stopping for charging mode, entire car controller is sent out to transmission control signal inside range extender system via distance increasing unit controller at this time
It send to engine controller and engine controller, control generator enters power generation after engine controller receives control signal
Mode, at the same engine controller receive control signal after control engine start, the kinetic energy of generation through generator convert to
Electric energy is power battery charging；When power battery current remaining capacity value is greater than charging limit value and is greater than electric energy abundance limit value,
Execute step B；When power battery current remaining capacity value is greater than charging limit value and is less than electric energy abundance limit value, step C is executed；
Step B carries out the judgement of gas pedal opening value, when it is greater than pure electric 4 wheel driven limit value, switches to or is maintained at and most force
Fast mode, range extender system and power battery are provided which power at this time, and engine controller is received to be passed by distance increasing unit controller
Pass come control signal after control engine generate kinetic energy through be inscribed clutch be transferred to generator, power battery is in cell tube
The electric energy exported under the control of reason system controls generator respectively through engine controller and rear motor controller and postposition is driven
Dynamic motor enters working condition, the electric energy for flowing through generator be converted into provided with range extender system internal engine after kinetic energy it is dynamic
It can combine and be transferred to front-wheel through preposition retarder jointly, centrally-mounted driving is by the kinetic energy of conversion after another part electric energy then drives
Rear-wheel is transferred to through postposition retarder；When gas pedal opening value is less than pure electric 4 wheel driven limit value, pure electricity is switched to or is maintained at
4 wheel driven mode, vehicle power is provided by power battery completely at this time, what power battery exported under the control of battery management system
Electric energy through engine controller and rear motor controller control respectively generator and after centrally-mounted driving the kinetic energy of conversion passed through
Preposition retarder is transferred to front-wheel and is transferred to rear-wheel through postposition retarder；
Step C carries out the judgement of gas pedal opening value, when it is greater than front and back and drives limit value, switches to or be maintained at pure electric rear-guard
Mode, vehicle power is provided by power battery completely at this time, the electric energy that power battery exports under the control of battery management system
The kinetic energy of conversion is transferred to rear-wheel through postposition retarder by centrally-mounted driving after the control of rear motor controller；In gas pedal
When opening value is less than front and back drive limit value, pure electric forerunner's mode is switched to or is maintained at, vehicle power is completely by power battery at this time
It provides, the electric energy that power battery exports under the control of battery management system controls generator for conversion through engine controller
Kinetic energy is transferred to front-wheel through preposition retarder.
7. control method according to claim 6, which is characterized in that in step C, advanced action edge battery current residual
Capability value judgement when power battery current remaining capacity value is greater than and increases degree value, then carries out gas pedal opening value judgement, holds
The pure electric rear-guard mode of row or pure electric forerunner's mode；It is described increase degree value size between charging limit value and electric energy abundance limit value it
Between, when power battery current remaining capacity value is less than and increases degree value, switches to and increase journey drive mode, mentioned at this time by engine
For power and to power battery electric energy supplement, battery management system transmits power battery not enough power supply signal to entire car controller,
Entire car controller feedback stops electric discharge instruction, and distance increasing unit controller is after receiving the work order that entire car controller is sent, together
When control engine controller and engine controller, generator and engine is respectively started, the kinetic energy that engine generates is through sending out
Motor is converted into electric energy, and a part flows to power battery and carries out power battery charging, and another part flows to rear motor controller
And then kinetic energy is transmitted after centrally-mounted driving starting after controlling and is transferred to rear-wheel realization driving via postposition retarder.
8. control method according to claim 7, which is characterized in that in step C, before switching to or being maintained at pure electricity
After drive mode, also progress vehicle slip rate judgement first switches to pure electric rear-guard mode when it is greater than slip rate limit value, if
Vehicle slip rate is still greater than slip rate limit value on the basis of this, then further switches to pure electric 4 wheel driven mode；It is switching to or is keeping
After pure electric rear-guard mode, increasing journey drive mode, also carry out the judgement of vehicle slip rate, when it is greater than slip rate limit value, then into
One step switches to pure electric 4 wheel driven mode.
9. the control method according to one of claim 6 to 8, which is characterized in that further include step D, carry out electric vehicle
Current vehicle speed judgement switches to or keeps cruise drive mode when it is more than or equal to speed limit value, passes through distance increasing unit system at this time
The engine of system provides power and realizes that energy is converted into power battery and charges using generator, engine and generator point
Working condition Jie Shou not be entered after the signal of corresponding controllers, the kinetic energy that engine generates is transferred to power generation through inscribed clutch
Machine, being on the one hand converted into electric energy is power battery charging, is on the other hand transferred to front-wheel by machine driving and realizes driving.
10. control method according to claim 9, which is characterized in that in step D, be less than in electric vehicle current vehicle speed
Speed limit value and be more than or equal to energy regenerating limit value when, execute step E；
Step E switches to or keeps energy recuperation mode, at this point, entire car controller is to distance increasing unit controller and rear motor control
Device processed sends relevant work instruction, so that the engine controller controls engine inside range extender system is in close state,
Engine controller then controls generator and enters power generation mode, and front-wheel kinetic energy is transferred to hair through preposition retarder and external clutch
Motor is supplemented to power battery interior through engine controller to be converted into electric energy；Rear-wheel kinetic energy is also flowed through through postposition retarder
Centrally-mounted driving is converted into electric energy and is supplemented to power battery interior through rear motor controller again afterwards, is power battery charging.
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