CN107600066B - For the comprehensive shift schedule implementation method of plug-in hybrid-power automobile - Google Patents
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Abstract
One kind being used for the comprehensive shift schedule implementation method of plug-in hybrid-power automobile, through statistics plug-in hybrid-power automobile under particular cycle operating condition after accelerator pedal aperture distribution situation, to plug-in hybrid-power automobile working pattern analysis under different accelerator pedal apertures, the corresponding plug-in hybrid-power automobile operating mode distribution of different accelerator pedal open ranges is determined；The upshift law formulation scheme under each driving mode is determined further according to accelerator pedal statistical law, the specific upshift rule under different mode is calculated, and corresponding upshift rule Map figure is obtained after combined and amendment；It finally determines the downshift law formulation method under different mode, and combines the comprehensive upshift rule of plug-in hybrid-power automobile and downshift rule to obtain comprehensive shift schedule.
Description
Technical field
The present invention relates to electric vehicle transmission control technology fields, particularly a kind of to be used for plug-in hybrid vapour
The comprehensive shift schedule implementation method of vehicle.
Background technique
With energy demand rapid growth and petroleum resources increasingly scarcity between contradictory aggravation, energy-saving and emission-reduction increasingly by
To global concern, plug-in hybrid-power automobile with the features such as its good fuel economy and environment friendly, meets the tendency of and
Out.Plug-in hybrid-power automobile transmission control technology is to reduce fuel consumption, improve driver comfort, reduce shift process
The key technology of middle power interruption, wherein shift schedule is the core technology of transmission control again, designs reasonable shift schedule
Vehicle fuel-economizing potentiality can be sufficiently excavated out, therefore, plug-in hybrid-power automobile shift schedule research becomes plug-in mixing
The hot spot of vehicle technology area research.
Plug-in hybrid electric vehicle power system structure is different from orthodox car, has more one or two than orthodox car
A driving motor, therefore, the formulation of shift schedule are likewise different from orthodox car.The shift schedule of orthodox car is applied to insert
Electric-type hybrid vehicle does not account for the characteristic of motor not only, motor work can not be allowed in high efficient district, while can not play
The fuel-economizing potentiality of plug-in hybrid-power automobile energy management strategies.Accelerator pedal aperture on plug-in hybrid-power automobile is
Through that cannot be applied directly on the throttle opening of engine, meaning has been different from orthodox car, orthodox car based on
The shift schedule of throttle opening design has not been suitable for plug-in hybrid-power automobile.Therefore, it is necessary to propose that one kind is directed to
Plug-in hybrid-power automobile, the shift schedule for considering engine and motor characteristic.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, proposes a kind of comprehensive for plug-in hybrid-power automobile
Shift schedule implementation method.
The present invention is achieved by the following technical solutions:
The present invention passes through statistics plug-in hybrid-power automobile accelerator pedal aperture distribution situation under particular cycle operating condition
Afterwards, to plug-in hybrid-power automobile working pattern analysis under different accelerator pedal apertures, different accelerator pedal apertures are determined
The corresponding plug-in hybrid-power automobile operating mode distribution of range；Each driving mode is determined further according to accelerator pedal statistical law
Under upshift law formulation scheme, be calculated under different mode specific upshift rule, it is combined and amendment after corresponded to
Upshift rule Map figure；Finally determine the downshift law formulation method under different mode, and plug-in hybrid-power automobile is comprehensive
Mould assembly upshift rule and downshift rule combine to obtain comprehensive shift schedule.
The method specifically includes the following steps:
Step 1: statistics plug-in hybrid-power automobile accelerator pedal aperture distribution situation under particular cycle operating condition: root
Demand under the operator demand's torque analytic method and state of cyclic operation of the maximum driving force envelope synthesized with motor according to engine
The calculating of driving power, so that statistical analysis obtains the distribution situation of accelerator pedal aperture.
Step 2: plug-in hybrid-power automobile working pattern analysis under different accelerator pedal apertures: being accelerated by comparison
Pedal opening, state of cyclic operation speed, vehicle demand power, engine driving power and motor driven power, to obtain difference
The operating mode distribution situation of plug-in hybrid-power automobile under accelerator pedal aperture, so that it is determined that different accelerator pedal apertures out
The corresponding plug-in hybrid-power automobile operating mode distribution of range.
Step 3: determining the upshift law formulation scheme under each driving mode according to accelerator pedal statistical law: for tool
There is driving mode to manually select the plug-in hybrid-power automobile of function, driving mode is divided into EV driving mode, Hybrid
Normal driving mode, Hybrid sport driving mode, for the angle of design idea, EV driving mode, Hybrid
Normal driving mode is under the premise of meeting dynamic property, using low oil consumption as the preferable vehicle economy of Targets, Hybrid
Sport driving mode is then using high dynamic property as target.
The EV driving mode includes: with the upshift rule implementation under Hybrid normal driving mode
3.1, when accelerator pedal aperture is less than some aperture, using the economical upshift rule of electric-only mode；
3.2, it is economical with power pattern synthesis upshift using hybrid mode when accelerator pedal aperture is greater than some aperture
Rule.
Upshift rule implementation includes: under the Hybrid sport driving mode
When 3.a, accelerator pedal aperture are less than some aperture, using electric-only mode power type upshift rule；
When 3.b, accelerator pedal aperture are greater than some aperture, using hybrid mode power type upshift rule.
The design of the economical weight transition used with power pattern synthesis upshift rule of hybrid mode in step 3.2
Mode, accelerator pedal aperture is bigger, and power type upshift rule proportion is bigger, and accelerator pedal aperture is smaller, economical upshift
Weight shared by rule is bigger, meets the dynamic property requirement of vehicle traveling in this way.
Step 4: according to engine and electricity in EV driving mode, Hybrid normal, Hybrid sport driving mode
Machine Torque-sharing strategy calculates separately the economical upshift rule of electric-only mode, electric-only mode power type upshift rule, mixing
The economical upshift rule of dynamic mode, hybrid mode power type upshift rule.
Using tractive force as parameter, economical upshift rule is the power type upshift rule with vehicle running efficiency
Parameter.
The electric-only mode power type upshift rule, obtains: in the following manner for electric-only mode, first root
According to the torque distribution principle in vehicle energy management strategies, the output torque of motor and engine is determined.Secondly, to accelerator pedal
Aperture draws out the traction force curve under each accelerator pedal aperture discrete point according to certain intervals discretization.Then selection traction
The intersection point of adjacent two gear is as upshift point on force curve, when no intersection point, it is contemplated that when practical shift, shift front and back motor should be avoided
Speed difference it is excessive, reduce running at high speed for motor, reduce the vibration, impact and noise of resulting power drive system, keep away
Exempt to lose the service life of each component, therefore selects to keep out the 85% of max. speed as upshift point, to calculate pure electric vehicle
Power type upshift rule under mode.
The electric-only mode economical upshift rule, obtains in the following manner: under electric-only mode, only motor
The ratio of one power source, output power of motor and input power is electric efficiency, and commonly using percentage indicates, electric efficiency is anti-
The size of its internal power consumption is reflected, low efficiency illustrates that motor interior loss is big, waste of energy；It is high-efficient to illustrate motor
Internal loss is small, saves electric energy.Therefore, the present invention designs economical upshift rule under electric-only mode using electric efficiency as target
Rule.The target of optimum motor efficiency shift schedule is the gear row for guaranteeing automobile always with motor work in greater efficiency region
It sails.
Firstly, the output torque of motor and engine is determined according to the torque distribution principle in vehicle energy management strategies,
Electric efficiency curve is respectively kept off under each accelerator pedal aperture of electric-only mode secondly, scheming to determine according to electric efficiency Map.Then, it selects
The intersection point of adjacent two gears electric efficiency curve is selected as upshift point, when no intersection point, select the 85% of low gear max. speed as liter
Catch point, thus economical upshift rule under calculated electric-only mode.
The hybrid mode power type upshift rule, obtains: first for hybrid mode in the following manner
Engine is first determined according to the torque distribution principle in vehicle energy management strategies, the torque of motor distributes.Discretization adds first
Speed pedal aperture draws and respectively keeps off traction force curve under each accelerator pedal aperture discrete point.Then select adjacent two gears tractive force bent
The intersection point of line is as upshift point, when no intersection point, selects keep out max. speed 85% as upshift point, so that it is dynamic to calculate mixing
Power type upshift rule under force mode.
The economical upshift rule of the hybrid mode, obtains in the following manner: under hybrid mode, there is hair
Two power sources of motivation and motor when formulating economical shift schedule, are considered as automobile always so that vehicle running efficiency is higher
Region gear traveling.Firstly, according to the torque distribution principle in vehicle energy management strategies, engine, motor are determined
Working condition.The road horsepower of vehicle is special by the structure to hybrid vehicle from engine and two power sources of motor
Analysis of Power Flow under point and hybrid mode, obtains vehicle running efficiency computation model are as follows:In formula, Pm: output power of motor；Pe: engine output；ηit: the effect of each gear transmission ratio
Rate；ηm: the electromotive efficiency of motor；ηbat: the efficiency for charge-discharge of battery；ηe: the efficiency of engine.
Secondly, determining the vehicle efficiency curve respectively kept off under each accelerator pedal aperture according to vehicle running efficiency computation model.
Then, the intersection point of adjacent two gears electric efficiency curve is selected to select the 85% of low gear max. speed when no intersection point as upshift point
As upshift point, to calculate the economical upshift rule of hybrid mode.
The design method of the weight transition refers to: hybrid mode is economical to adopt with power pattern synthesis upshift rule
With the design method of weight transition, accelerator pedal aperture is bigger, and power type upshift rule proportion is bigger, accelerator pedal aperture
Smaller, weight shared by economical upshift rule is bigger.
The economical upshift point with power pattern synthesis upshift rule of hybrid mode in step 3.2 meets:
V=avd+b·ve, in which: v is Overall shift schedule upshift point；A is power type shift schedule weight；Vd is
Power type shift schedule upshift point；B is economical shift schedule weight；veFor economical shift schedule upshift point.
The corresponding table of the accelerator pedal aperture and power type shift schedule weight, economical shift schedule weight, such as table 1
It is shown.
1 accelerator pedal aperture of table-weight corresponds to table
Step 5: by electric-only mode power type upshift rule, the economical upshift rule of electric-only mode, hybrid power mould
Formula power type upshift rule and hybrid mode economical upshift rule, according to the EV driving mode determined in step 3,
Shift schedule under Hybrid normal driving mode and Hybrid sport driving mode determines scheme, and combination obtains each row
The upshift rule Map figure under mode is sailed, unreasonable shifting points are modified and are adjusted after having combined, finally obtained three
Upshift rule Map figure.
Step 6: determining under EV driving mode, Hybrid normal driving mode and Hybrid sport driving mode
Downshift law formulation method finally combines the comprehensive upshift rule of plug-in hybrid-power automobile and downshift rule is integrated
Type shift schedule.
The downshift rule refers to: since downshift point has to be lower than upshift point, and needing certain difference between the two
Away from because if smaller without downshift speed difference or downshift speed difference, it would be possible that the case where will appear circulation shift.In order to avoid
Such case needs to be arranged certain downshift speed difference, i.e. shift delay.Divergence form shift schedule is used in the present invention, is guaranteed
There is good power performance when starting and acceleration, and it is comfortable steady in often travelling, and economy is also preferable.By introducing evaluation system
It counts to evaluate the degree of shift schedule diverging:Wherein: vupiTo rise up into speed when i gear, vdowniFor
Speed when i gear falls into i-1 gear.
Technical effect
Compared with prior art, multi power source torque point under present invention combination plug-in hybrid-power automobile multi-operation mode
With the characteristics of, make the power type different from conventional truck and economical shift schedule, introduce weight factor, comprehensively consider dynamic
The demand of power and economy, has formulated comprehensive shift schedule, and shift schedule proposed by the present invention and former shift schedule emulate
The result shows that vehicle fuel economy maximum improves 21.1% under the premise of guaranteeing dynamic property.Fuel oil is improved to greatest extent
Economy.
Detailed description of the invention
Fig. 1 is plug-in hybrid-power automobile structural schematic diagram in embodiment；
In figure: 1 battery management system, 2 battery pack bodies, 3 electric machine controllers, 4 motor bodies, 5 motor speed sensors,
6 engines, 7 engine speed sensors, 8 engine electric-controlled units, 9 engine flywheels, 10 main clutch, 11 double clutches become
Fast device, 12 shift sensor, 13 vehicle speed sensor, 14 main gearbox assemblies, 15 driver's cabins, 16 accelerator pedal jaw opening sensors, 17
Brake-pressure sensor, 18 entire car controllers, 19 brake monitors, 20 brakes；
Fig. 2 is schematic diagram of the present invention
Fig. 3 is NEDC state of cyclic operation accelerator pedal aperture situation distribution map；
Fig. 4 is power of motor, engine power, vehicle demand power comparison diagram；
Fig. 5 is that pure electric drive draws force curve under different accelerator pedal apertures, and a, b, c, d are respectively that accelerator pedal is in figure
Driving traction force curve under electric-only mode when 100%, 60%, 40% and 20%；
Fig. 6 is electric-only mode power type upshift rule；
Fig. 7 is electric efficiency Map figure；
Fig. 8 is electric-only mode electric efficiency under different accelerator open degrees, and a, b, c, d are respectively that accelerator pedal is in figure
Electric-only mode driving motor efficiency curve when 100%, 60%, 40% and 20%；
Fig. 9 is the economical upshift rule of electric-only mode；
Figure 10 is combination drive mode pulling force curve under different accelerator open degrees, and a, b, c, d are respectively accelerator pedal in figure
Driving traction force curve under combination drive mode when being 100%, 60%, 40% and 20%；
Figure 11 is combination drive mode power type upshift law curve；
Figure 12 is hybrid mode power flow；
Figure 13 is vehicle running efficiency curve under different accelerator open degrees, in which: a, b, c, d are respectively and calculate pedal to open in figure
Vehicle running efficiency curve when degree is 100%, 60%, 40%, 20%；
Figure 14 is the economical upshift law curve of hybrid mode；
Figure 15 is that upshift rule Map schemes under EV driving mode；
Figure 16 is that upshift rule Map schemes under Hybrid normal driving mode；
Figure 17 is that upshift rule Map schemes under Hybrid sport driving mode；
Figure 18 is that shift schedule Map schemes under EV driving mode；
Figure 19 is that shift schedule Map schemes under Hybrid normal driving mode；
Figure 20 is that shift schedule Map schemes under Hybrid sport driving mode；
Specific embodiment
It elaborates by taking NEDC state of cyclic operation as an example to the embodiment of the present invention below, the present embodiment is with skill of the present invention
Implemented under premised on art scheme, the detailed implementation method and specific operation process are given, but protection model of the invention
It encloses and is not limited to the following embodiments.
The present embodiment specifically includes the following steps:
Step 1: accelerator pedal aperture distribution situation under statistics NEDC state of cyclic operation
According to the operator demand's torque analytic method and NEDC of the maximum driving force envelope that engine is synthesized with motor
The calculating of requirement drive power under state of cyclic operation, so that the distribution situation of accelerator pedal aperture is obtained, as shown in figure 3, by system
The distribution situation of meter analysis accelerator pedal aperture concludes that in most cases accelerator pedal aperture is all distributed in 30%
Below.
Step 2: PHEV working pattern analysis under different accelerator pedal apertures
By comparing accelerator pedal aperture, vehicle demand power, engine power, power of motor, as shown in figure 4, motor
The power being operated alone can satisfy the requirement of entire NEDC state of cyclic operation, and in NEDC state of cyclic operation actual emulation process
In, statistics discovery, pure electric drive mode accounts for most times, occurs driving charge mode once in a while, mould is operated alone in engine
Formula, but there is no combination drive mode substantially.
It is main based on the above analysis it can be concluded that 30% accelerator pedal aperture is hereinafter, vehicle demand torque is smaller
It to be electric-only mode, more than 30% accelerator pedal aperture, vehicle demand torque is larger, mainly hybrid mode.
Step 3: the upshift rule scheme under each driving mode is determined according to accelerator pedal statistical law
For manually selecting the PHEV of function with driving mode, driving mode is divided into EV driving mode, Hybrid
Normal driving mode, Hybrid sport driving mode, for the angle of design idea, EV driving mode, Hybrid
Normal driving mode pursues preferable vehicle economy, using low oil consumption as target, Hybrid under the premise of meeting dynamic property
Sport driving mode is then using high dynamic property as target.
Under NEDC state of cyclic operation, because vehicle demand torque is smaller, EV and Hybrid normal driving mode turn
Square allocation strategy is identical, and pursues vehicle economy objectives, therefore can design same shift schedule Map figure.
Based on the above analysis, the upshift rule design under EV and Hybrid normal driving mode is as follows:
3.1, accelerator pedal aperture 30% is hereinafter, using the economical upshift rule of electric-only mode；
3.2,30% or more accelerator pedal aperture, it is economical regular with power pattern synthesis upshift using hybrid mode.
The design of upshift rule is as follows under Hybrid sport driving mode:
3.a, accelerator pedal aperture 30% are hereinafter, using electric-only mode power type upshift rule；
3.b, 30% or more accelerator pedal aperture, using hybrid mode power type upshift rule.
According to electric-only mode in the present embodiment plug-in hybrid-power automobile energy management strategies, hybrid mode
Torque distribution principle, determines the distribution of torque of motor, motor and engine, then separately designs electric-only mode power type and warp
Ji type two parameter shift schedule and hybrid mode power type and economical two parameter shift schedule.Wherein, power type is shifted gears
Rule is using tractive force as parameter, and economical shift schedule is using vehicle running efficiency as parameter.
Step 4: electric-only mode power type upshift rule calculation method
Motor is operated alone under electric-only mode, first according to the torque distribution principle in vehicle energy management strategies, such as
Shown in table 2, the working condition of motor is determined.
2 electric-only mode torque of table distribution
The engine and motor of plug-in hybrid-power automobile in the present embodiment are totally placed in dual-clutch transmission
Before, so when electric-only mode, driving force are as follows:Wherein: TmFor motor output torque；igFor DCT biography
Dynamic ratio；i0For final driver ratio；ηtFor mechanical efficiency of power transmission；R is radius of wheel.
By taking 100%, 60%, 40%, 20% accelerator pedal aperture as an example, respectively gear traction under each accelerator pedal aperture is drawn out
Force curve, as shown in Figure 5.
Then it selects the intersection point of adjacent two gears traction force curve as upshift point, when no intersection point, should theoretically take low gear
Max. speed point, it is contemplated that the speed difference that shift front and back motor should be avoided is excessive when practical shift, reduces electricity as upshift point
Machine runs at high speed, and reduces the vibration, impact and noise of resulting power drive system, avoids the use for losing each component
Service life, therefore select to keep out the 85% of max. speed as upshift point, readily available stable shift process, thus calculated
Power type upshift rule is as shown in Figure 6 under electric-only mode.
Step 5: the economical upshift rule calculation method of electric-only mode
Under electric-only mode, the ratio of only one power source of motor, output power of motor and input power is motor
Efficiency, electric efficiency reflect the size of its internal power consumption.Low efficiency illustrates that motor interior loss is big, waste of energy；
It is high-efficient, illustrate that motor interior loss is small, saves electric energy.Therefore, the present embodiment designs pure electric vehicle using electric efficiency as target
Economical shift schedule.The target of optimum motor efficiency shift schedule is to guarantee automobile always so that motor work is in greater efficiency
The gear in region travels.
It is similar with when formulating power type shift schedule, first according to the torque distribution principle in vehicle energy management strategies,
As shown in table 1, the working condition of motor is determined.
Schemed according to electric efficiency Map, as shown in fig. 7, by taking 100%, 60%, 40%, 20% accelerator pedal aperture as an example, really
Determine under electric-only mode respectively to keep off electric efficiency curve when different accelerator pedal apertures as shown in Figure 8.
Then low gear should theoretically be taken when no intersection point for upshift point by selecting the intersection point of adjacent two gears electric efficiency curve
Max. speed point, it is contemplated that the speed difference that shift front and back motor should be avoided is excessive when practical shift, reduces electricity as upshift point
Machine runs at high speed, and reduces the vibration, impact and noise of resulting power drive system, avoids the use for losing each component
Service life, therefore select the 85% of low gear max. speed as upshift point, readily available stable shift process, calculated pure electricity
The economical upshift rule of dynamic model formula is as shown in Figure 9.
Step 6: hybrid mode power type upshift rule calculation method
For hybrid mode, first according to the torque distribution principle in vehicle energy management strategies, as shown in table 3,
Determine the working condition of engine, motor.
3 hybrid mode torque allocation table of table
Under hybrid mode, driving force are as follows:Wherein: TeFor engine output torque.
Respectively gear traction under each accelerator pedal aperture is drawn out by taking accelerator pedal aperture 100%, 60%, 40%, 20% as an example
Force curve, as shown in Figure 10.
Then selecting the intersection point of adjacent two gears traction force curve theoretically should take low gear most when no intersection point for upshift point
High speed point is as upshift point, it is contemplated that when practical shift, it is excessive to should be avoided shift front and back engine, the speed difference of motor,
Reduce engine, motor runs at high speed, reduce the vibration, impact and noise of resulting power drive system, avoid rolling over
The service life of each component is damaged, therefore selects to keep out the 85% of max. speed as upshift point, it is readily available stable to shift gears
Journey, so that calculated combination drive power type upshift rule is as shown in figure 11.
Step 7: the economical upshift rule calculation method of hybrid mode
Under hybrid mode, there are two power sources of engine and motor, when formulating economical shift schedule, be considered as vapour
Vehicle is travelled with the gear in the higher region of vehicle running efficiency.It is distributed first according to the torque in vehicle energy management strategies former
Then, as shown in table 2, the working condition of engine, motor is determined.Under hybrid mode, the flow direction of power flow such as Figure 12 institute
Show.
The road horsepower of vehicle comes from engine and two power sources of motor, according to the present invention middle plug-in hybrid vapour
The design feature of vehicle and the Analysis of Power Flow under hybrid mode, vehicle running efficiency model are as follows:Wherein: Pm: output power of motor；Pe: engine output；ηit: each gear transmission ratio
Efficiency；ηm: the electromotive efficiency of motor；ηbat: the efficiency for charge-discharge of battery；ηe: the efficiency of engine.
By taking 100%, 60%, 40%, 20% accelerator pedal aperture as an example, according to vehicle running efficiency computation model, thus
Determine the vehicle efficiency curve respectively kept off under each accelerator pedal aperture, as shown in figure 13.
Then low gear should theoretically be taken when no intersection point for upshift point by selecting the intersection point of adjacent two gears electric efficiency curve
Max. speed point, it is contemplated that the speed difference that shift front and back motor should be avoided is excessive when practical shift, reduces electricity as upshift point
Machine runs at high speed, and reduces the vibration, impact and noise of resulting power drive system, avoids the use for losing each component
Service life, therefore the 85% of low gear max. speed is selected as upshift point, thus the economical upshift of calculated hybrid mode
It is regular as shown in figure 14.
Step 8: hybrid mode is economical with power pattern synthesis upshift law formulation method
The design method of the economical weight transition used with power pattern synthesis upshift rule of hybrid mode, accelerates to step on
Plate aperture is bigger, and power type upshift rule proportion is bigger, and accelerator pedal aperture is smaller, weight shared by economical upshift rule
It is bigger.
V=avd+b·ve, in which: v is Overall shift schedule upshift point；A is power type shift schedule weight；vdIt is
Power type shift schedule upshift point；B is economical shift schedule weight；veFor economical shift schedule upshift point.
The corresponding table of accelerator pedal aperture and power type shift schedule weight, economical shift schedule weight is as shown in table 1.
By electric-only mode power type upshift rule, the economical upshift rule of electric-only mode, hybrid mode power
Type upshift rule and the economical upshift rule of hybrid mode, according to EV driving mode determined above, Hybrid normal
Shift schedule under driving mode and Hybrid sport driving mode determines scheme, and combination obtains the upshift under each driving mode
Regular Map figure.After having combined, unreasonable shifting points are modified and are adjusted, finally obtained three upshift rule Map figure
As seen in figs. 15-17.
Step 9: downshift law formulation method under various driving modes
Downshift point has to be lower than upshift point, and needs a certain distance between the two, because if not having downshift speed difference
Or downshift speed difference is smaller, it would be possible that the case where will appear circulation shift.In order to avoid such case, need to be arranged certain
Downshift speed difference, i.e. shift delay.
The concept of divergence form gear shift delay is that gear shift delay increases with the increase of accelerator open degree, is distributed in diverging,
Referred to as increase delay shift schedule.Its feature is: driver can intervene shift, and when fast accelerator releasing can change to high gear in advance, no
Noise is only reduced, and improves fuel economy；The engine speed of upshift is high under large throttle aperture, close to maximum power crawl
Power is good；Shift delay increases, and reduces shift number, improves comfort.However, downshift when large throttle aperture, engine
Revolving speed n must fall too low, shift front and back rotational speed difference is excessive, and the utilization rate of power is poor, so the shift delay of this type is suitable
The car big for stand-by power.Because car often travels under good Highway Conditions, worked mostly with small accelerator open degree,
This shift schedule can guarantee starting and have good power performance when accelerating, and then comfortable steady in often travelling, economy
Also preferably.
For the plug-in hybrid-power automobile in the present embodiment, mostly with the work of small throttle, is shifted gears and advised using divergence form
Rule, can guarantee has good power performance in starting and acceleration, and in often travelling, then comfortable steady, economy is also preferable.
The degree of shift schedule diverging is evaluated by introducing evaluation coefficient.
Wherein: vupiTo rise up into speed when i gear, vdowniSpeed when falling into i-1 gear for i gear.
It is final to determine for EV and Hybrid normal shift schedule, when accelerator pedal aperture is less than or equal to 30%, take
Ai=0.15, when being greater than 30%, take Ai=0.4.For Hybrid sport shift schedule, it is less than or equal in accelerator pedal aperture
When 30%, A is takeni=0.4, when being greater than 30%, take Ai=0.45.
Step 10: upshift rule and downshift rule combine to obtain shift schedule Map under each driving mode and scheme
Shift under the tri- kinds of driving modes of EV driving mode, Hybrid normal, Hybrid sport finally made
Regular Map figure, shown in Figure 18~20.
Step 11: vehicle economy is compared with power index simulation result
Step 1, NEDC state of cyclic operation economic index simulation result
4 electric equilibrium oil consumption simulation result of table
Step 2, power index simulation result are max. speed
5 max. speed simulation result of table
Step 3, power index simulation result are the acceleration time
6 acceleration time of table simulation result
Step 4, power index simulation result are speed of persistently climbing
7 gradient 4% of table is persistently climbed speed simulation result
8 gradient 12% of table is persistently climbed speed simulation result
According to the above simulation result it can be concluded that after using new shift schedule, vehicle dynamic property and economy are all
It is substantially improved, to demonstrate the reasonability of shift schedule formulating method.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (11)
1. one kind is used for the comprehensive shift schedule implementation method of plug-in hybrid-power automobile, which is characterized in that inserted by counting
Electric-type hybrid vehicle is under particular cycle operating condition after accelerator pedal aperture distribution situation, to different accelerator pedal aperture underthrusts
Electric-type hybrid vehicle working pattern analysis determines the corresponding plug-in hybrid vapour of different accelerator pedal open ranges
The distribution of turner operation mode；The upshift law formulation scheme under each driving mode is determined further according to accelerator pedal statistical law, is calculated
The specific upshift rule under different mode is obtained, corresponding upshift rule Map figure is obtained after combined and amendment；It finally determines not
It is combined with the downshift law formulation method under mode, and by the comprehensive upshift rule of plug-in hybrid-power automobile and downshift rule
Obtain comprehensive shift schedule；
It is described be used for the comprehensive shift schedule implementation method of plug-in hybrid-power automobile specifically includes the following steps:
Step 1: statistics plug-in hybrid-power automobile accelerator pedal aperture distribution situation under particular cycle operating condition: according to hair
Requirement drive under the operator demand's torque analytic method and state of cyclic operation of the maximum driving force envelope that motivation is synthesized with motor
The calculating of power, so that statistical analysis obtains the distribution situation of accelerator pedal aperture；
Step 2: plug-in hybrid-power automobile working pattern analysis under different accelerator pedal apertures: by comparing accelerator pedal
Aperture, vehicle demand power, engine driving power and motor driven power, to obtain plug-in under different accelerator pedal apertures
The operating mode distribution situation of formula hybrid vehicle, so that it is determined that different accelerator pedal open ranges are corresponding plug-in mixed out
Close the distribution of power vehicle operating mode；
Step 3: determining the upshift law formulation scheme under each driving mode according to accelerator pedal statistical law: for having row
The mode of sailing manually selects the plug-in hybrid-power automobile of function, and driving mode is divided into EV driving mode, Hybrid normal
Driving mode, Hybrid sport driving mode, for the angle of design idea, EV driving mode, Hybrid normal row
Mode is sailed under the premise of meeting dynamic property, using low oil consumption as the preferable vehicle economy of Targets, Hybrid sport row
Mode is sailed then using high dynamic property as target；
Step 4: being turned according to engine in EV driving mode, Hybrid normal, Hybrid sport driving mode and motor
Square allocation strategy calculates separately the economical upshift rule of electric-only mode, electric-only mode power type upshift rule, hybrid power
The economical upshift rule of mode, hybrid mode power type upshift rule；
Step 5: electric-only mode power type upshift rule, the economical upshift rule of electric-only mode, hybrid mode are moved
Power type upshift rule and the economical upshift rule of hybrid mode, according to EV driving mode, the Hybrid determined in step 3
Shift schedule under normal driving mode and Hybrid sport driving mode determines scheme, and combination obtains under each driving mode
Upshift rule Map figure, unreasonable shifting points are modified and are adjusted after having combined, finally obtained three upshift rules
Map figure；
Step 6: determining the downshift under EV driving mode, Hybrid normal driving mode and Hybrid sport driving mode
Law formulation method finally combines the comprehensive upshift rule of plug-in hybrid-power automobile and downshift rule to obtain comprehensive change
Gear rule.
2. according to the method described in claim 1, it is characterized in that, the EV driving mode and Hybrid normal travel mould
Upshift rule implementation under formula includes:
3.1, when accelerator pedal aperture is less than some aperture, using the economical upshift rule of electric-only mode；
3.2, it when accelerator pedal aperture is greater than some aperture, is advised using hybrid mode is economical with power pattern synthesis upshift
Rule；
Upshift rule implementation includes: under the Hybrid sport driving mode
When 3.a, accelerator pedal aperture are less than some aperture, using electric-only mode power type upshift rule；
When 3.b, accelerator pedal aperture are greater than some aperture, using hybrid mode power type upshift rule.
3. according to the method described in claim 2, it is characterized in that, the hybrid mode in step 3.2 is economical and power type
Comprehensive upshift rule uses the design method of weight transition, i.e. accelerator pedal aperture is bigger, power type upshift rule proportion
Bigger, accelerator pedal aperture is smaller, and weight shared by economical upshift rule is bigger, meets vehicle traveling in this way
Dynamic property requirement.
4. method according to claim 1 or 2 or 3, characterized in that the power type upshift rule is by tractive force in terms of
Index is calculated, economical upshift rule is using vehicle running efficiency as parameter.
5. method according to claim 1 or 2, characterized in that the electric-only mode power type upshift rule passes through
Following manner obtains: for electric-only mode, first according to the torque distribution principle in vehicle energy management strategies, determining motor
With the output torque of engine；Secondly, drawing out each accelerator pedal aperture according to certain intervals discretization to accelerator pedal aperture
Traction force curve under discrete point；Then the intersection point of adjacent two gear on traction force curve is selected to examine as upshift point when no intersection point
When considering practical shift, the speed difference that shift front and back motor should be avoided is excessive, reduces running at high speed for motor, reduces resulting
Vibration, impact and the noise of power drive system avoid the service life for losing each component, therefore max. speed is kept out in selection
85% is used as upshift point, to calculate power type upshift rule under electric-only mode.
6. method according to claim 1 or 2, characterized in that the economical upshift rule of the electric-only mode passes through
Following manner obtains: economical upshift rule, the shift of optimum motor efficiency under using electric efficiency as target design electric-only mode
The target of rule is to guarantee that automobile is always travelled with motor work in the gear in greater efficiency region, i.e., first according to vehicle energy
Torque distribution principle in management strategy, determines the output torque of motor and engine；Secondly scheme to determine according to electric efficiency Map
Electric efficiency curve is respectively kept off under each accelerator pedal aperture of electric-only mode；Then the intersection point of adjacent two gears electric efficiency curve is selected
As upshift point, when no intersection point, the 85% of low gear max. speed is selected as upshift point, thus under calculated electric-only mode
Economical upshift rule.
7. method according to claim 1 or 2, characterized in that the hybrid mode power type upshift rule is led to
It crosses following manner to obtain: for hybrid mode, be determined first according to the torque distribution principle in vehicle energy management strategies
The torque distribution of engine, motor；Discretization accelerator pedal aperture first is drawn respectively to keep off under each accelerator pedal aperture discrete point and be led
Gravitation curve；Then select the intersection point of adjacent two gears traction force curve as upshift point, when no intersection point, max. speed is kept out in selection
85% be used as upshift point, to calculate under hybrid mode power type upshift rule.
8. method according to claim 1 or 2, characterized in that the economical upshift rule of the hybrid mode is led to
It crosses following manner to obtain: under hybrid mode, considering automobile always so that the gear row in the higher region of vehicle running efficiency
It sails, i.e., the working condition of engine, motor is determined according to the torque distribution principle in vehicle energy management strategies first, wherein
The road horsepower of vehicle by the design feature to hybrid vehicle and mixes dynamic from engine and two power sources of motor
Analysis of Power Flow under force mode obtains vehicle running efficiency computation model are as follows:In formula, Pm:
Output power of motor；Pe: engine output；ηit: the efficiency of each gear transmission ratio；ηm: the electromotive efficiency of motor；ηbat: battery
Efficiency for charge-discharge；ηe: the efficiency of engine；
Secondly the vehicle efficiency curve respectively kept off under each accelerator pedal aperture is determined according to vehicle running efficiency computation model；Then,
Select the intersection point of adjacent two gears electric efficiency curve as upshift point, when no intersection point, select the 85% of low gear max. speed as
Upshift point, to calculate the economical upshift rule of hybrid mode.
9. according to the method described in claim 3, it is characterized in that, the design method of the weight transition refers to: hybrid power
The economical design method that weight transition is used with power pattern synthesis upshift rule of mode, accelerator pedal aperture is bigger, power type
Upshift rule proportion is bigger, and accelerator pedal aperture is smaller, and weight shared by economical upshift rule is bigger.
10. method according to claim 1 or 2 or 3, characterized in that the hybrid mode is economical and power
The upshift point of pattern synthesis upshift rule meets: v=avd+b·ve, in which: v is Overall shift schedule upshift point；A is power type
Shift schedule weight；vdFor power type shift schedule upshift point；B is economical shift schedule weight；veFor economical shift schedule
Upshift point.
11. according to the method described in claim 1, it is characterized in that, the downshift rule refers to: using divergence form shift rule
Rule evaluates the degree of shift schedule diverging by introducing evaluation coefficient:Wherein: vupiTo rise up into i
Speed when gear, vdowniSpeed when falling into i-1 gear for i gear.
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