CN107472074A - The accelerator pedal parsing control method and system of electric automobile - Google Patents
The accelerator pedal parsing control method and system of electric automobile Download PDFInfo
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- CN107472074A CN107472074A CN201610694063.0A CN201610694063A CN107472074A CN 107472074 A CN107472074 A CN 107472074A CN 201610694063 A CN201610694063 A CN 201610694063A CN 107472074 A CN107472074 A CN 107472074A
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- speed
- electrokinetic cell
- accelerator pedal
- cell soc
- soc
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Classifications
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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
-
- 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
-
- 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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
The present invention proposes the accelerator pedal parsing control method and system of a kind of electric automobile, comprises the following steps：Accelerator pedal depth, speed and the electrokinetic cell SOC of collection vehicle；According to accelerator pedal depth, speed and electrokinetic cell SOC, accelerator pedal depth is obtained by query driven coefficient three-dimensional lookup table, motor drive factor corresponding to speed and electrokinetic cell SOC；And the motor drive factor according to corresponding to accelerator pedal depth, speed and electrokinetic cell SOC determines the target drive torque of vehicle.The method of the present invention can lift VMT Vehicle-Miles of Travel as far as possible while being protected to electrokinetic cell, vehicle is in optimal transport condition all the time.
Description
Technical field
The present invention relates to technical field of vehicle, the accelerator pedal of more particularly to a kind of electric automobile parses control method and is
System.
Background technology
In the control system of electric automobile, parsing to accelerator pedal be typically according to accelerator pedal aperture and speed come
The demand torque of predictive calculation driver, and motor driving vehicle traveling is controlled accordingly.At present, in the market is largely electronic
Automobile employs a variety of driving models to realize drive demand of the driver to vehicle, such as comfort mode, economic model, fortune
Dynamic model formula etc..It is common at present in order to realize driving model different on electric automobile in the control system of electric automobile
Way is under different driving model demands, parses control mode using different accelerator pedals to realize driver to difference
The demand of driving model.However, during normal use, driver does not take into account that the state of charge letter of electrokinetic cell in itself
Breath, when electrokinetic cell SOC is too low, the discharge capability of electrokinetic cell in itself can be restricted, now if driver still enters
Overdischarge phenomenon occurs in the traveling of the bad working environments such as the anxious acceleration of row, climbing, electrokinetic cell, and such a phenomenon can serious curtailment power
The service life of battery.
Based on above mentioned problem, a kind of presently relevant scheme is under different driving models, passes through putting for electrokinetic cell
The anti-output torque for pushing away motor of electric energy power, and then realize the protection to electrokinetic cell.It is specifically described as：Vehicle is stepped on according to fixed
Plate parsing policy resolution draws the target drive torque of motor, vehicle further according to current power battery discharge capability, and
The factors such as the efficiency of consideration motor, the discharging efficiency of electrokinetic cell extrapolate available motor driving torque in real time, are stepped on by basis
The plate motor target drive torque that goes out of parsing policy resolution and the motor driving torque calculated in real time take it is small draw it is final
Motor control torque, and then drive vehicle traveling.Wherein, it is that the moment of torsion of current electric automobile parses controlling party such as shown in Fig. 1
Formula.That is, tabled look-up by the depth of accelerator pedal with speed information and draw drive factor, the external characteristics warp of front and rear motor system
The theoretical maximum driving force for the system that draws is crossed after being superimposed, the target drive torque after pedal parsing is drawn after the two product,
Target drive torque and the actual driving force of current electric system and the motor calculated according to battery system discharge capability
Maximum driving torque take target drive torque of the smaller value as final output more afterwards.
However, the control strategy in such scheme, driver's still unconscious progress when electrokinetic cell SOC is too low
When suddenly giving it the gun, electrokinetic cell can continue to export with the available discharge power of maximum, and battery last is operated in maximum electric discharge work(
During rate, the life-span of electrokinetic cell is still had a certain impact first, and the discharging efficiency of now electrokinetic cell is too low so that
Continual mileage reduce it is a lot, and be unsatisfactory for electrokinetic cell SOC it is too low when, lifting continual mileage as far as possible can go home the need of charging
Ask.
The content of the invention
It is contemplated that at least solves one of above-mentioned technical problem.
Therefore, it is an object of the present invention to propose that a kind of accelerator pedal of electric automobile parses control method, the party
Method can lift VMT Vehicle-Miles of Travel as far as possible while being protected to electrokinetic cell, make vehicle all the time in optimal
Transport condition.
It is another object of the present invention to the accelerator pedal for proposing a kind of electric automobile to parse control system.
To achieve these goals, the embodiment of first aspect present invention discloses a kind of accelerator pedal solution of electric automobile
Control method is analysed, is comprised the following steps：Accelerator pedal depth, speed and the electrokinetic cell SOC of collection vehicle；According to the acceleration
Tread depths, speed and electrokinetic cell SOC, the accelerator pedal depth, car are obtained by query driven coefficient three-dimensional lookup table
Motor drive factor corresponding to fast and electrokinetic cell SOC；And according to the accelerator pedal depth, speed and electrokinetic cell SOC
Corresponding motor drive factor determines the target drive torque of the vehicle.
The accelerator pedal parsing control method of electric automobile according to embodiments of the present invention, according to accelerator pedal depth, car
Speed and electrokinetic cell SOC, motor drive factor is obtained by query driven coefficient three-dimensional lookup table, and then according to the drive factor
Determine the target drive torque of vehicle.This method can be under same accelerator pedal depth and speed, according to different SOC shapes
State, interpolation draw different pedal parsing torque, so as to limit the discharge power of electrokinetic cell in the source of driving torque, entered
And realize while being protected to electrokinetic cell, VMT Vehicle-Miles of Travel is lifted as far as possible, makes vehicle all the time in optimal
Transport condition.
In addition, the accelerator pedal parsing control method of electric automobile according to the above embodiment of the present invention can also have such as
Additional technical characteristic down：
In some instances, the drive factor three-dimensional lookup table includes first to fourth drive factor three-dimensional lookup table,
It is described that electricity corresponding to the accelerator pedal depth, speed and electrokinetic cell SOC is obtained by query driven coefficient three-dimensional lookup table
Machine drive factor, further comprises：Judge the electrokinetic cell SOC；If it is pre- that the electrokinetic cell SOC is more than or equal to first
If value, then according to the accelerator pedal depth, speed and the electrokinetic cell SOC, by inquiring about first drive factor three
Dimension inquiry table obtains the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；If the power
Battery SOC is more than or equal to and the second preset value and is less than first preset value, then according to the accelerator pedal depth, speed and
The electrokinetic cell SOC, by inquire about the second drive factor three-dimensional lookup table obtain the accelerator pedal depth, speed and
Motor drive factor corresponding to electrokinetic cell SOC；If the electrokinetic cell SOC is more than or equal to the 3rd preset value and is less than institute
The second preset value is stated, then according to the accelerator pedal depth, speed and the electrokinetic cell SOC, is driven by inquiring about the described 3rd
Dynamic coefficient three-dimensional lookup table obtains the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；If
The electrokinetic cell SOC is less than the 3rd preset value, then according to the accelerator pedal depth, speed and the electrokinetic cell
SOC, the accelerator pedal depth, speed and electrokinetic cell SOC are obtained by inquiring about the 4th drive factor three-dimensional lookup table
Corresponding motor drive factor.
In some instances, in addition to：If the electrokinetic cell SOC is more than or equal to the 3rd preset value and less than described
Second preset value, then the max. speed of the vehicle is limited to the first preset vehicle speed.
In some instances, in addition to：If the electrokinetic cell SOC is less than the 3rd preset value, by the car
Max. speed be limited to the second preset vehicle speed, wherein, second preset vehicle speed is less than first preset vehicle speed.
In some instances, first preset value is 50%, and second preset value is 30%, the 3rd preset value
For 20%.
To achieve these goals, the embodiment of second aspect of the present invention discloses a kind of accelerator pedal solution of electric automobile
Control system is analysed, including：Acquisition module, the acquisition module are used for accelerator pedal depth, speed and the power electric of collection vehicle
Pond SOC；Enquiry module, the enquiry module is used for according to the accelerator pedal depth, speed and electrokinetic cell SOC, by looking into
Ask drive factor three-dimensional lookup table and obtain the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；
And torque calculation module, the torque calculation module are used for according to SOC pairs of the accelerator pedal depth, speed and electrokinetic cell
The drive factor answered determines the target drive torque of the vehicle.
The accelerator pedal parsing control system of electric automobile according to embodiments of the present invention, according to accelerator pedal depth, car
Speed and electrokinetic cell SOC, motor drive factor is obtained by query driven coefficient three-dimensional lookup table, and then according to the drive factor
Determine the target drive torque of vehicle.The system can be under same accelerator pedal depth and speed, according to different SOC shapes
State, interpolation draw different pedal parsing torque, so as to limit the discharge power of electrokinetic cell in the source of driving torque, entered
And realize while being protected to electrokinetic cell, VMT Vehicle-Miles of Travel is lifted as far as possible, makes vehicle all the time in optimal
Transport condition.
In addition, the accelerator pedal parsing control system of electric automobile according to the above embodiment of the present invention can also have such as
Additional technical characteristic down：
In some instances, the drive factor three-dimensional lookup table includes first to fourth drive factor three-dimensional lookup table,
The enquiry module is used for：Judge the electrokinetic cell SOC, and be more than or equal to the first preset value in the electrokinetic cell SOC
When, according to the accelerator pedal depth, speed and the electrokinetic cell SOC, looked into by inquiring about the first drive factor three-dimensional
Inquiry table obtains the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC, and in the power electric
When pond SOC is more than or equal to the second preset value and is less than first preset value, according to the accelerator pedal depth, speed and institute
Electrokinetic cell SOC is stated, the accelerator pedal depth, speed and dynamic are obtained by inquiring about the second drive factor three-dimensional lookup table
Motor drive factor corresponding to power battery SOC, and be more than or equal to the 3rd preset value in the electrokinetic cell SOC and be less than institute
When stating the second preset value, according to the accelerator pedal depth, speed and the electrokinetic cell SOC, driven by inquiring about the described 3rd
Dynamic coefficient three-dimensional lookup table obtains the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC, and
When the electrokinetic cell SOC is less than three preset value, according to the accelerator pedal depth, speed and the electrokinetic cell
SOC, the accelerator pedal depth, speed and electrokinetic cell SOC are obtained by inquiring about the 4th drive factor three-dimensional lookup table
Corresponding motor drive factor.
In some instances, in addition to：Speed control module, the speed control module are used in the electrokinetic cell
When SOC is more than or equal to the 3rd preset value and is less than second preset value, the max. speed of the vehicle is limited to first
Preset vehicle speed.
In some instances, the speed control module is additionally operable to：It is default to be less than the described 3rd in the electrokinetic cell SOC
During value, the max. speed of the vehicle is limited to the second preset vehicle speed, wherein, second preset vehicle speed is less than described first
Preset vehicle speed.
In some instances, first preset value is 50%, and second preset value is 30%, the 3rd preset value
For 20%.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the schematic flow sheet of existing electric automobile torque parsing control method；
Fig. 2 is the flow chart of the accelerator pedal parsing control method of electric automobile according to an embodiment of the invention；
Fig. 3 is the schematic diagram of the first drive factor three-dimensional lookup table according to an embodiment of the invention；
Fig. 4 is the schematic diagram of the second drive factor three-dimensional lookup table according to an embodiment of the invention；
Fig. 5 is the schematic diagram of the 3rd drive factor three-dimensional lookup table according to an embodiment of the invention；
Fig. 6 is the schematic diagram of the 4th drive factor three-dimensional lookup table according to an embodiment of the invention；And
Fig. 7 is the structured flowchart of the accelerator pedal parsing control system of electric automobile according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint are relative
Importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
The accelerator pedal parsing control method of electric automobile according to embodiments of the present invention is described below in conjunction with accompanying drawing and is
System.
Fig. 2 is the flow chart of the accelerator pedal parsing control method of electric automobile according to an embodiment of the invention.Such as
Shown in Fig. 1, this method comprises the following steps：
Step S1：Accelerator pedal depth, speed and the electrokinetic cell SOC of collection vehicle.
Step S2：According to accelerator pedal depth, speed and electrokinetic cell SOC, pass through query driven coefficient three-dimensional lookup table
Obtain accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC.I.e. embodiments of the invention are to drivetrain
Control is optimized in several lookup table modes, except tabling look-up in addition to input for accelerator pedal depth and speed, also add power electric
The judgement of pond SOC states, i.e., SOC states are also served as into the influence factor that drive system tables look-up.
In one embodiment of the invention, drive factor three-dimensional lookup table is for example including first to fourth drive factor three
Tie up inquiry table.Wherein, the schematic diagram of the first drive factor three-dimensional lookup table is as shown in Figure 3；Second drive factor three-dimensional lookup table
Schematic diagram it is as shown in Figure 4；The schematic diagram of 3rd drive factor three-dimensional lookup table is as shown in Figure 5；4th drive factor three-dimensional is looked into
The schematic diagram for asking table is as shown in Figure 6.Based on this, accelerator pedal depth, speed are obtained by query driven coefficient three-dimensional lookup table
And motor drive factor corresponding to electrokinetic cell SOC, further comprise：
First, it is determined that electrokinetic cell SOC.
If electrokinetic cell SOC is more than or equal to the first preset value, according to accelerator pedal depth, speed and electrokinetic cell
SOC, electricity corresponding to accelerator pedal depth, speed and electrokinetic cell SOC is obtained by inquiring about the first drive factor three-dimensional lookup table
Machine drive factor.Wherein, the first preset value is, for example, 50%.In other words, i.e., add when electrokinetic cell SOC states are higher than 50%
Speed pedal parsing control strategy using control mode of tabling look-up as shown in Figure 3, i.e., according to current accelerator pedal depth, speed and
Electrokinetic cell SOC, motor drive factor is inquired about by the first drive factor three-dimensional lookup table.Now electrokinetic cell electricity is sufficient,
Discharge capability is stronger, in order to realize the stronger locomitivity of vehicle, does not consider shadow of the motor working region to economic performance
Ring, it is necessary to the requirement of driving force quick response accelerator pedal, the situation of now drive factor response accelerator pedal can it is radical a lot.
On the other hand, if electrokinetic cell SOC is more than or equal to the second preset value and is less than the first preset value, basis adds
Speed pedal depth, speed and electrokinetic cell SOC, by inquire about the second drive factor three-dimensional lookup table obtain accelerator pedal depth,
Motor drive factor corresponding to speed and electrokinetic cell SOC.Wherein, the second preset value is, for example, 30%.In other words, that is, power is worked as
(30≤SOC between battery SOC state 30% to 50%<50%) when, accelerator pedal parsing control strategy uses as shown in Figure 4
Table look-up control mode, i.e., according to current accelerator pedal depth, speed and electrokinetic cell SOC, it is three-dimensional to pass through the second drive factor
Inquiry table inquires about motor drive factor.Now electrokinetic cell electricity is in normal range (NR), and discharge capability is general, now relatively high
The accelerator pedal parsing situation of SOC states, such a analysis mode more tend to normal mode, can now take into account the motility of vehicle
Energy, the demand in the efficient operation region of motor is taken into account again, now the situation of the corresponding accelerator pedal of drive factor can compare calibration
Often.
On the other hand, if electrokinetic cell SOC is more than or equal to the 3rd preset value and is less than the second preset value, basis adds
Speed pedal depth, speed and electrokinetic cell SOC, by inquire about the 3rd drive factor three-dimensional lookup table obtain accelerator pedal depth,
Motor drive factor corresponding to speed and electrokinetic cell SOC.Wherein, the 3rd preset value is, for example, 20%.
Further, in one embodiment of invention, in addition to：It is pre- that if electrokinetic cell SOC is more than or equal to the 3rd
If being worth and being less than the second preset value, then the max. speed of vehicle is limited to the first preset vehicle speed.Wherein, the first preset vehicle speed example
Such as it is 120km/h.
In other words, i.e., as 20≤SOC<When 30%, now electrokinetic cell SOC states are in relatively low scope, accelerator pedal
Control strategy is parsed using control mode of tabling look-up as shown in Figure 5, i.e., according to current accelerator pedal depth, speed and power electric
Pond SOC, motor drive factor is inquired about by the 3rd drive factor three-dimensional lookup table.Now electrokinetic cell electricity is in relatively low scope
Interior, discharge capability is weaker, and now accelerator pedal parsing situation can be further limited, and such a analysis mode can limit max. speed
(such as speed limit 120km/h), now mainly consider the demand in the efficient operation region of motor, motor is worked all the time
In efficient region, energy expenditure rate is minimum to reach, and now the situation of the corresponding accelerator pedal of drive factor can be relatively slower.
On the other hand, if electrokinetic cell SOC is less than the 3rd preset value, according to accelerator pedal depth, speed and power
Battery SOC, it is corresponding that accelerator pedal depth, speed and electrokinetic cell SOC are obtained by the 4th drive factor three-dimensional lookup table of inquiry
Motor drive factor.
Further, in one embodiment of the invention, if electrokinetic cell SOC is less than the 3rd preset value, by car
Max. speed be limited to the second preset vehicle speed, wherein, the second preset vehicle speed is less than the first preset vehicle speed.Second preset vehicle speed
For example, 80km/h.
In other words, i.e., when SOC states are less than 20%, accelerator pedal parsing control strategy is tabled look-up using as shown in Figure 6
Control mode, i.e., according to current accelerator pedal depth, speed and electrokinetic cell SOC, inquired about by the way that the 4th drive factor is three-dimensional
Table inquires about motor drive factor.Now electrokinetic cell electricity come into it is too low need in chargeable range, discharge capability is very weak, this
When accelerator pedal parsing situation can farthest be limited, such a analysis mode can limit max. speed (such as speed limit 80km/
H), extending driving range, and then enable the vehicle to the place that drives to charging station or can charge as far as possible is now mainly considered
Charged, can now limit driving cycle, vehicle substantially slowly travels in below 80km/h, and now drive factor accordingly adds
The situation of speed pedal can be very slow.
Step S3：Vehicle is determined according to motor drive factor corresponding to accelerator pedal depth, speed and electrokinetic cell SOC
Target drive torque.Specifically, drive factor is multiplied with theoretical maximum driving torque can obtain the target of vehicle traveling demand
Driving torque.
To sum up, the accelerator pedal parsing control method of the electric automobile of the embodiment of the present invention, by controlling accelerator pedal
Parsing, realization are protected to electrokinetic cell to a certain extent, and can be used according to electrokinetic cell SOC states different
Pedal parses control strategy, and then controls vehicle to be in optimal transport condition all the time, i.e., can when electrokinetic cell SOC is higher
There is stronger power performance, when electrokinetic cell SOC is relatively low, motor is operated in efficient region, as electrokinetic cell SOC
Continual mileage is lifted when too low as far as possible.
The accelerator pedal parsing control method of electric automobile according to embodiments of the present invention, according to accelerator pedal depth, car
Speed and electrokinetic cell SOC, motor drive factor is obtained by query driven coefficient three-dimensional lookup table, and then according to the drive factor
Determine the target drive torque of vehicle.This method can be under same accelerator pedal depth and speed, according to different SOC shapes
State, interpolation draw different pedal parsing torque, so as to limit the discharge power of electrokinetic cell in the source of driving torque, entered
And realize while being protected to electrokinetic cell, VMT Vehicle-Miles of Travel is lifted as far as possible, makes vehicle all the time in optimal
Transport condition.
Further embodiment of the present invention additionally provides a kind of accelerator pedal parsing control system of electric automobile.
Fig. 7 is the structured flowchart of the accelerator pedal parsing control system of electric automobile according to an embodiment of the invention.
As shown in fig. 7, the accelerator pedal parsing control system 100 of electric automobile according to an embodiment of the invention, including：Gather mould
Block 110, enquiry module 120 and torque calculation module 130.
Wherein, acquisition module 110 is used for accelerator pedal depth, speed and the electrokinetic cell SOC of collection vehicle.
Enquiry module 120 is used for according to accelerator pedal depth, speed and electrokinetic cell SOC, passes through query driven coefficient three
Dimension inquiry table obtains accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC.That is embodiments of the invention
Control is optimized to the lookup table mode of drive factor, except tabling look-up in addition to input for accelerator pedal depth and speed, also increased
The judgements of electrokinetic cell SOC states, i.e., SOC states are also served as into the influence factor that drive system tables look-up.
Specifically, drive factor three-dimensional lookup table includes first to fourth drive factor three-dimensional lookup table.Based on this, inquire about
Module 120 is used for：Judge electrokinetic cell SOC, and when electrokinetic cell SOC is more than or equal to the first preset value, stepped on according to acceleration
Plate depth, speed and electrokinetic cell SOC, accelerator pedal depth, speed are obtained by inquiring about the first drive factor three-dimensional lookup table
And motor drive factor corresponding to electrokinetic cell SOC, and it is more than or equal to the second preset value and less than the in electrokinetic cell SOC
During one preset value, according to accelerator pedal depth, speed and electrokinetic cell SOC, by inquiring about the second drive factor three-dimensional lookup table
Obtain accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC, and be more than in electrokinetic cell SOC or
When equal to the 3rd preset value and being less than the second preset value, according to accelerator pedal depth, speed and electrokinetic cell SOC, pass through inquiry
3rd drive factor three-dimensional lookup table obtains accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC, with
And when electrokinetic cell SOC is less than three preset values, according to accelerator pedal depth, speed and electrokinetic cell SOC, pass through inquiry the
Four drive factor three-dimensional lookup tables obtain accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC.Its
In, the first preset value is, for example, 50%, and the second preset value is, for example, 30%, and the 3rd preset value is, for example, 20%.
It is true that torque calculation module 130 is used for the drive factor according to corresponding to accelerator pedal depth, speed and electrokinetic cell SOC
Determine the target drive torque of vehicle.Specifically, drive factor is multiplied with theoretical maximum driving torque can obtain vehicle traveling need
The target drive torque asked.
Further, in one embodiment of the invention, the system 100 also includes speed control module.Speed controls
Module is used for when electrokinetic cell SOC is more than or equal to the 3rd preset value and is less than the second preset value, by the max. speed of vehicle
It is limited to the first preset vehicle speed.Wherein, the first preset vehicle speed is, for example, 120km/h.
Further, speed control module is additionally operable to when electrokinetic cell SOC is less than three preset values, by the highest of vehicle
Speed is limited to the second preset vehicle speed, wherein, the second preset vehicle speed is less than the first preset vehicle speed.Second preset vehicle speed is, for example,
80km/h。
In other words, i.e., according to current accelerator pedal depth, speed and moved when electrokinetic cell SOC states are higher than 50%
Power battery SOC, motor drive factor is inquired about by the first drive factor three-dimensional lookup table.Now electrokinetic cell electricity is sufficient, puts
Electric energy power is stronger, in order to realize the stronger locomitivity of vehicle, does not consider influence of the motor working region to economic performance,
Need the requirement of driving force quick response accelerator pedal, now drive factor response accelerator pedal situation can it is radical a lot.When
(30≤SOC between electrokinetic cell SOC states 30% to 50%<50%) when, according to current accelerator pedal depth, speed and move
Power battery SOC, motor drive factor is inquired about by the second drive factor three-dimensional lookup table.Now electrokinetic cell electricity is in normally
In the range of, discharge capability is general, and now the accelerator pedal parsing situation of relatively high SOC states, such a analysis mode more tend to
Normal mode, can now take into account the exercise performance of vehicle, take into account the demand in the efficient operation region of motor again, now drive
The situation of the corresponding accelerator pedal of coefficient can be relatively more normal.As 20≤SOC<When 30%, now electrokinetic cell SOC states are in relatively low
In the range of, according to current accelerator pedal depth, speed and electrokinetic cell SOC, looked into by the 3rd drive factor three-dimensional lookup table
Ask motor drive factor.Now electrokinetic cell electricity is in relatively low scope, and discharge capability is weaker, now accelerator pedal parsing feelings
Condition can be further limited, and such a analysis mode can limit max. speed (such as speed limit 120km/h), now main to consider driving electricity
The demand in the efficient operation region of machine, makes motor always work in efficient region, minimum to reach energy expenditure rate, now
The situation of the corresponding accelerator pedal of drive factor can be relatively slower.It is deep according to current accelerator pedal when SOC states are less than 20%
Degree, speed and electrokinetic cell SOC, motor drive factor is inquired about by the 4th drive factor three-dimensional lookup table.Now electrokinetic cell
Electricity come into it is too low need in chargeable range, discharge capability is very weak, and now accelerator pedal parsing situation can be maximum
Limited, such a analysis mode can limit max. speed (such as speed limit 80km/h), now main to consider to extend in driving as far as possible
Journey, and then the place for enabling the vehicle to drive to charging station or can charge is charged, and can now limit driving cycle, vehicle
Substantially slowly travelled in below 80km/h, now the situation of the corresponding accelerator pedal of drive factor can be very slow.
To sum up, the accelerator pedal parsing control system of the electric automobile of the embodiment of the present invention, by controlling accelerator pedal
Parsing, realization are protected to electrokinetic cell to a certain extent, and can be used according to electrokinetic cell SOC states different
Pedal parses control strategy, and then controls vehicle to be in optimal transport condition all the time, i.e., can when electrokinetic cell SOC is higher
There is stronger power performance, when electrokinetic cell SOC is relatively low, motor is operated in efficient region, as electrokinetic cell SOC
Continual mileage is lifted when too low as far as possible.
It should be noted that the specific implementation side of the accelerator pedal parsing control system of the electric automobile of the embodiment of the present invention
The specific implementation that formula parses control method with the accelerator pedal of the electric automobile of the embodiment of the present invention is similar, specifically refers to
The description of method part, in order to reduce redundancy, here is omitted.
The accelerator pedal parsing control system of electric automobile according to embodiments of the present invention, according to accelerator pedal depth, car
Speed and electrokinetic cell SOC, motor drive factor is obtained by query driven coefficient three-dimensional lookup table, and then according to the drive factor
Determine the target drive torque of vehicle.The system can be under same accelerator pedal depth and speed, according to different SOC shapes
State, interpolation draw different pedal parsing torque, so as to limit the discharge power of electrokinetic cell in the source of driving torque, entered
And realize while being protected to electrokinetic cell, VMT Vehicle-Miles of Travel is lifted as far as possible, makes vehicle all the time in optimal
Transport condition.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is by claim and its equivalent limits.
Claims (10)
1. the accelerator pedal parsing control method of a kind of electric automobile, it is characterised in that comprise the following steps：
Accelerator pedal depth, speed and the electrokinetic cell SOC of collection vehicle；
According to the accelerator pedal depth, speed and electrokinetic cell SOC, obtained by query driven coefficient three-dimensional lookup table described
Accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；And
The mesh of the vehicle is determined according to motor drive factor corresponding to the accelerator pedal depth, speed and electrokinetic cell SOC
Mark driving torque.
2. the accelerator pedal parsing control method of electric automobile according to claim 1, it is characterised in that the drivetrain
Number three-dimensional lookup table includes first to fourth drive factor three-dimensional lookup table, described to be obtained by query driven coefficient three-dimensional lookup table
To motor drive factor corresponding to the accelerator pedal depth, speed and electrokinetic cell SOC, further comprise：
Judge the electrokinetic cell SOC；
If the electrokinetic cell SOC is more than or equal to the first preset value, according to the accelerator pedal depth, speed and described
Electrokinetic cell SOC, accelerator pedal depth, speed and the power are obtained by inquiring about the first drive factor three-dimensional lookup table
Motor drive factor corresponding to battery SOC；
If the electrokinetic cell SOC is more than or equal to the second preset value and is less than first preset value, added according to described
Speed pedal depth, speed and the electrokinetic cell SOC, described add is obtained by inquiring about the second drive factor three-dimensional lookup table
Speed pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；
If the electrokinetic cell SOC is more than or equal to the 3rd preset value and is less than second preset value, added according to described
Speed pedal depth, speed and the electrokinetic cell SOC, described add is obtained by inquiring about the 3rd drive factor three-dimensional lookup table
Speed pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；
If the electrokinetic cell SOC is less than the 3rd preset value, according to the accelerator pedal depth, speed and described dynamic
Power battery SOC, accelerator pedal depth, speed and the power electric are obtained by inquiring about the 4th drive factor three-dimensional lookup table
Motor drive factor corresponding to the SOC of pond.
3. the accelerator pedal parsing control method of electric automobile according to claim 2, it is characterised in that also include：
If the electrokinetic cell SOC is more than or equal to the 3rd preset value and is less than second preset value, by the vehicle
Max. speed be limited to the first preset vehicle speed.
4. the accelerator pedal parsing control method of electric automobile according to claim 3, it is characterised in that also include：
If the electrokinetic cell SOC is less than the 3rd preset value, it is pre- that the max. speed of the vehicle is limited to second
If speed, wherein, second preset vehicle speed is less than first preset vehicle speed.
5. the accelerator pedal parsing control method according to claim any one of 1-4, it is characterised in that described first is default
It is worth for 50%, second preset value is 30%, and the 3rd preset value is 20%.
A kind of 6. accelerator pedal parsing control system of electric automobile, it is characterised in that including：
Acquisition module, the acquisition module are used for accelerator pedal depth, speed and the electrokinetic cell SOC of collection vehicle；
Enquiry module, the enquiry module are used for according to the accelerator pedal depth, speed and electrokinetic cell SOC, pass through inquiry
Drive factor three-dimensional lookup table obtains the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC；With
And
Torque calculation module, the torque calculation module are used for according to SOC pairs of the accelerator pedal depth, speed and electrokinetic cell
The drive factor answered determines the target drive torque of the vehicle.
7. the accelerator pedal parsing control system of electric automobile according to claim 6, it is characterised in that the drivetrain
Number three-dimensional lookup table includes first to fourth drive factor three-dimensional lookup table, and the enquiry module is used for：
Judge the electrokinetic cell SOC, and when the electrokinetic cell SOC is more than or equal to the first preset value, added according to described
Speed pedal depth, speed and the electrokinetic cell SOC, described add is obtained by inquiring about the first drive factor three-dimensional lookup table
Speed pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC, and be more than or wait in the electrokinetic cell SOC
In the second preset value and when being less than first preset value, according to the accelerator pedal depth, speed and the electrokinetic cell
SOC, the accelerator pedal depth, speed and electrokinetic cell SOC are obtained by inquiring about the second drive factor three-dimensional lookup table
Corresponding motor drive factor, and it is more than or equal to the 3rd preset value and pre- less than described second in the electrokinetic cell SOC
If during value, according to the accelerator pedal depth, speed and the electrokinetic cell SOC, by inquiring about the 3rd drive factor three
Dimension inquiry table obtains the accelerator pedal depth, speed and motor drive factor corresponding to electrokinetic cell SOC, and described dynamic
When power battery SOC is less than three preset value, according to the accelerator pedal depth, speed and the electrokinetic cell SOC, pass through
Inquire about the 4th drive factor three-dimensional lookup table and obtain electricity corresponding to the accelerator pedal depth, speed and electrokinetic cell SOC
Machine drive factor.
8. the accelerator pedal parsing control system of electric automobile according to claim 7, it is characterised in that also include：
Speed control module, the speed control module be used for the electrokinetic cell SOC be more than or equal to the 3rd preset value and
During less than second preset value, the max. speed of the vehicle is limited to the first preset vehicle speed.
9. the accelerator pedal parsing control system of electric automobile according to claim 8, it is characterised in that the speed control
Molding block is additionally operable to：
When the electrokinetic cell SOC is less than three preset value, the max. speed of the vehicle is limited to second and preset
Speed, wherein, second preset vehicle speed is less than first preset vehicle speed.
10. the accelerator pedal parsing control system of the electric automobile according to claim any one of 6-9, it is characterised in that
First preset value is 50%, and second preset value is 30%, and the 3rd preset value is 20%.
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| CN201610694063.0A CN107472074A (en) | 2016-08-19 | 2016-08-19 | The accelerator pedal parsing control method and system of electric automobile |
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| CN201610694063.0A CN107472074A (en) | 2016-08-19 | 2016-08-19 | The accelerator pedal parsing control method and system of electric automobile |
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Application publication date: 20171215 |