CN109910627A - A kind of planetary parallel-serial hybrid power automobile brake recovers energy calculation method - Google Patents
A kind of planetary parallel-serial hybrid power automobile brake recovers energy calculation method Download PDFInfo
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Abstract
It recovers energy calculation method the invention discloses a kind of planetary parallel-serial hybrid power automobile brake, this method is primarily based on the brake pedal aperture γ of planetary parallel-serial hybrid power automobile, motor MG2 revolving speed nMG2, automobile speed v and SOC value of battery judge energy recuperation mode locating for current vehicle, secondly mode according to locating for vehicle, calculates separately out Brake energy recovery power initial value of the vehicle under N grades and D grades；The influence of engine braking and motor MG2 temperature change to vehicle braking regenerative power, is provided with reasonable offset and temperature correction factor, obtains Brake energy recovery power actual value of the vehicle under N grades and D grades when then in view of the braking of vehicle band shelves.Present method solves the problems that error is larger in existing calculation method, precision is not high, can be improved the accuracy and reliability of vehicle braking energy regenerative power calculating.
Description
Technical field
The invention belongs to technical field of new energy, in particular to a kind of planetary parallel-serial hybrid power automobile brake returns
Receive energy method computations.
Background technique
Currently, having developed the new-energy automobile of low-carbon environment-friendly under the background that increasingly increases of pressure of the energy and environment
As the focal issue of social concerns, wherein planetary parallel-serial hybrid power automobile due to its fuel economy is good, discharge it is few at
For one of the popular direction of new-energy automobile.To make up planetary parallel-serial hybrid power automobile power cell cruising ability not
It is significant for the mileage travelled for improving vehicle to carry out Brake energy recovery by the way of regenerative braking for foot.Therefore, for
Planetary parallel-serial hybrid power automobile, accurately calculating of how realizing that automobile brake recovers energy are a problem to be solved.
In the prior art, planetary parallel-serial hybrid power automobile brake there is no to recover energy calculation method class patent, tradition
Calculation method do not account for vehicle in braking process motor MG2 temperature change to the influence that recovers energy of braking, gained
As a result larger with true value gap.Therefore, it is necessary to propose that a kind of planetary parallel-serial hybrid power automobile brake recovers energy meter
Calculation method accurately calculates the braking regenerative power that vehicle is under different braking energy recuperation mode.
Summary of the invention
The present invention provides a kind of planetary parallel-serial hybrid power automobile brake and recovers energy calculation method, solves existing planet
Formula parallel-serial hybrid power automobile brake recovers energy the problem that error is larger, precision is not high in calculation method, can be improved vehicle
The accuracy and reliability of Brake energy recovery power calculation.
To achieve the above object, a kind of planetary parallel-serial hybrid power automobile brake according to an embodiment of the present invention recycles energy
Measure calculation method, comprising the following steps:
Step 1, brake pedal aperture γ, motor MG2 revolving speed n are acquired by sensorMG2, automobile speed v and battery
The state informations such as SOC value；
Step 2, according to the brake pedal aperture γ of planetary parallel-serial hybrid power automobile, motor MG2 revolving speed nMG2, automobile
Speed v and SOC value of battery judge energy recuperation mode locating for current vehicle；
Step 2 (a), if meeting Brake energy recovery mode trigger condition, vehicle in formula (1) enters Brake energy recovery
Mode；
In formula (1), γBrk_loFor brake pedal aperture lower limit value, γ under Brake energy recovery modeBrk_hiBraking energy returns
Brake pedal aperture upper limit value, n under receipts modeBrkFor the minimum speed of motor MG2 under Brake energy recovery mode, vBrkFor braking
Minimum speed, soc required by energy recuperation modeBrk_hiFor the upper limit value of battery SOC under Brake energy recovery mode；
Step 2 (b) slides energy recuperation mode trigger condition if meeting in formula (2), vehicle, which enters, slides energy regenerating
Mode；
In formula (2), γSlide_loTo slide brake pedal aperture lower limit value, γ under energy recuperation modeSlide_hiSlide energy
Measure brake pedal aperture upper limit value under take-back model, nSlideFor the minimum speed for sliding motor MG2 under energy recuperation mode,
vSlideFor minimum speed, soc required by Brake energy recovery modeSlide_hiTo slide battery SOC under energy recuperation mode
Upper limit value；
Step 2 (c), if above two mode trigger condition is not satisfied, vehicle enters not take-back model；
Step 3, the mode according to locating for vehicle in step 2 calculates separately braking energy of the vehicle under N grades and D grades and returns
Receive power initial value；
Step 3 (a), vehicle are in Brake energy recovery mode, at the beginning of the Brake energy recovery power under N grades and D grades
Initial value PBrk_reg_N_iniBy brake pedal aperture γ and MG2 revolving speed nMG2By tabling look-up to obtain；
Step 3 (b), vehicle be in slide energy recuperation mode, under N grades and D grades slide energy regenerating power at the beginning of
Initial value PSlide_reg_N_iniIt tables look-up to obtain according to motor MG2 revolving speed and motor MG2 relative speed variation；
Step 3 (c), vehicle are in not take-back model, and the energy regenerating power of vehicle is 0 at this time；
Step 4, the mode according to locating for vehicle in step 2, it is contemplated that gear and motor MG2 temperature change are to regenerative power
It influences, calculates separately Brake energy recovery power actual value of the vehicle under N grades and D grades；
Step 4 (a), vehicle are in Brake energy recovery mode, the Brake energy recovery power as obtained in step 3 (a)
Initial value is multiplied with the modifying factor that motor MG2 temperature is tabled look-up under current time, obtains N grades of lower demand braking regenerative powers
Actual value；That is:
PBrk_reg_N=PBrk_reg_N_ini×δT··················(3)
In formula (3), PBrk_reg_NWhen being in Brake energy recovery mode for vehicle, N grades of lower braking regenerative power actual values,
PBrk_reg_N_iniFor N grades of Brake energy recovery mode lower braking regenerative power initial values；δTFor temperature correction factor；
Vehicle is in Brake energy recovery mode, by the braking regenerative power initial value under N grades add correction amount, then with work as
The modifying factor that preceding moment motor MG2 temperature is tabled look-up is multiplied, and obtains the demand braking regenerative power actual value under D grades；That is:
PBrk_reg_D=(PBrk_reg_N_ini+αBrk)×δT··················(4)
In formula (4), PBrk_reg_DWhen being in Brake energy recovery mode for vehicle, D grades of lower braking regenerative power actual values,
PBrk_reg_N_iniFor N grades of Brake energy recovery mode lower braking regenerative power initial values, αBrkTo be examined under Brake energy recovery mode
The braking power correction amount of engine braking, δ when considering the braking of vehicle band shelvesTFor temperature correction factor；
Step 4 (b), vehicle is in when sliding energy recuperation mode, and driver does not operate brake pedal, and braking is stepped on
Plate aperture γ is 0；Slide energy regenerating power initial value of the vehicle under N grades tables look-up to obtain with current time motor MG2 temperature
Modifying factor be multiplied, obtain N grade lower demands and brake regenerative power actual values；That is:
PSlide_reg_N=PSlide_reg_N_ini×δT···················(5)
In formula (5), PSlide_reg_DIt is in for vehicle when sliding energy recuperation mode, N grade time regenerative power actual values,
PSlide_reg_NTo slide N grades of energy recuperation mode lower braking regenerative power initial values, δTFor temperature correction factor；
Vehicle is in and slides energy recuperation mode, is added by sliding energy regenerating power initial value under N grades according to MG2 revolving speed
And the correction amount that motor MG2 relative speed variation is tabled look-up, then the modifying factor tabled look-up with current time motor MG2 temperature
It is multiplied, obtains the demand braking regenerative power actual value under D grades；That is:
PSlide_reg_D=(PSlide_reg_N_ini+αSlide)×δT················(6)
In formula (6), PSlide_reg_DIt is in for vehicle when sliding energy recuperation mode, D grade time energy regenerating power actual values,
PSlide_reg_N_iniTo slide N grades of energy recuperation mode lower energy regenerating power initial values, αSlideTo slide under energy recuperation mode
Consider the braking power correction amount of engine braking when the braking of vehicle band shelves, δTFor temperature correction factor.
The present invention having the beneficial effect that compared with prior art
It provides a kind of planetary parallel-serial hybrid power automobile brake to recover energy calculation method, it is contemplated that the braking of vehicle band shelves
When the influence to automobile brake regenerative power of engine braking and motor MG2 temperature change, it is mixed to solve existing planetary mixed connection
It closes power vehicle and brakes the problem that error is larger, precision is not high in the calculation method that recovers energy, can be improved vehicle braking energy
The accuracy and reliability that regenerative power calculates.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage combination following accompanying drawings of the invention will be to will become bright in the description of embodiment
It shows and is readily appreciated that, in which:
Fig. 1 is that a kind of planetary parallel-serial hybrid power automobile brake provided by the invention recovers energy calculation method process
Figure；
Fig. 2 is the flow chart provided by the invention for determining planetary parallel-serial hybrid power automobile energy take-back model；
Fig. 3 is planetary parallel-serial hybrid power automobile provided by the invention under Brake energy recovery mode different stalls
Brake regenerative power calculated with actual values flow chart；
Fig. 4 is planetary parallel-serial hybrid power automobile provided by the invention in the case where sliding energy recuperation mode different stalls
Brake regenerative power calculated with actual values flow chart；
A kind of planetary parallel-serial hybrid power automobile automobile configuration schematic diagram that Fig. 5 is applicable in by one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar symbol indicates same or similar physical quantity or the physical quantity with same or like meaning.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " array ", " model
Enclose " it shall be understood in a broad sense, for example, it may be one group of equally spaced number, is also possible to be spaced random number, for the general of this field
For logical technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
It is noted by the basic structure of planetary parallel-serial hybrid power automobile by those skilled in the art, herein
It no longer repeats one by one, only provides the typical configuration schematic diagram of a kind in attached drawing 5.
Below with reference to the accompanying drawings it is returned to describe a kind of planetary parallel-serial hybrid power automobile brake according to an embodiment of the present invention
Energy method computations are received, however, the present invention is not limited to these examples.
Method as shown in Figure 1, to recover energy the side of calculating suitable for planetary parallel-serial hybrid power automobile brake shown in Fig. 5
Method.This method comprises:
Step 1, brake pedal aperture γ, motor MG2 revolving speed n are acquired by sensorMG2, automobile speed v and battery
The state informations such as SOC value；
Step 2, according to the brake pedal aperture γ of planetary parallel-serial hybrid power automobile, motor MG2 revolving speed nMG2, automobile
Speed v and SOC value of battery judge energy recuperation mode locating for current vehicle；
Step 2 (a), if meeting Brake energy recovery mode trigger condition, vehicle in formula (1) enters Brake energy recovery
Mode；
In formula (1), γBrk_loFor brake pedal aperture lower limit value, γ under Brake energy recovery modeBrk_hiBraking energy returns
Brake pedal aperture upper limit value, n under receipts modeBrkFor the minimum speed of motor MG2 under Brake energy recovery mode, vBrkFor braking
Minimum speed, soc required by energy recuperation modeBrk_hiFor the upper limit value of battery SOC under Brake energy recovery mode；
Step 2 (b) slides energy recuperation mode trigger condition if meeting in formula (2), vehicle, which enters, slides energy regenerating
Mode；
In formula (2), γSlide_loTo slide brake pedal aperture lower limit value, γ under energy recuperation modeSlide_hiSlide energy
Measure brake pedal aperture upper limit value under take-back model, nSlideFor the minimum speed for sliding motor MG2 under energy recuperation mode,
vSlideFor minimum speed, soc required by Brake energy recovery modeSlide_hiTo slide battery SOC under energy recuperation mode
Upper limit value；
Step 2 (c), if above two mode trigger condition is not satisfied, vehicle enters not take-back model；
Step 3, the mode according to locating for vehicle in step 2 calculates separately braking energy of the vehicle under N grades and D grades and returns
Receive power initial value；
Step 3 (a), vehicle are in Brake energy recovery mode, at the beginning of the Brake energy recovery power under N grades and D grades
Initial value PBrk_reg_N_iniBy brake pedal aperture γ and MG2 revolving speed nMG2By tabling look-up to obtain；
Step 3 (b), vehicle be in slide energy recuperation mode, under N grades and D grades slide energy regenerating power at the beginning of
Initial value PSlide_reg_N_iniIt tables look-up to obtain according to motor MG2 revolving speed and motor MG2 relative speed variation；
Step 3 (c), vehicle are in not take-back model, and the energy regenerating power of vehicle is 0 at this time；
Step 4, the mode according to locating for vehicle in step 2, it is contemplated that gear and motor MG2 temperature change are to regenerative power
It influences, calculates separately Brake energy recovery power actual value of the vehicle under N grades and D grades；
Step 4 (a), vehicle are in Brake energy recovery mode, the Brake energy recovery power as obtained in step 3 (a)
Initial value is multiplied with the modifying factor that motor MG2 temperature is tabled look-up under current time, obtains N grades of lower demand braking regenerative powers
Actual value；That is:
PBrk_reg_N=PBrk_reg_N_ini×δT·····················(3)
In formula (3), PBrk_reg_NWhen being in Brake energy recovery mode for vehicle, N grades of lower braking regenerative power actual values,
PBrk_reg_N_iniFor N grades of Brake energy recovery mode lower braking regenerative power initial values；δTFor temperature correction factor；
Vehicle is in Brake energy recovery mode, by the braking regenerative power initial value under N grades add correction amount, then with work as
The modifying factor that preceding moment motor MG2 temperature is tabled look-up is multiplied, and obtains the demand braking regenerative power actual value under D grades；That is:
PBrk_reg_D=(PBrk_reg_N_ini+αBrk)×δT················(4)
In formula (4), PBrk_reg_DWhen being in Brake energy recovery mode for vehicle, D grades of lower braking regenerative power actual values,
PBrk_reg_N_iniFor N grades of Brake energy recovery mode lower braking regenerative power initial values, αBrkTo be examined under Brake energy recovery mode
The braking power correction amount of engine braking, δ when considering the braking of vehicle band shelvesTFor temperature correction factor；
Step 4 (b), vehicle is in when sliding energy recuperation mode, and driver does not operate brake pedal, and braking is stepped on
Plate aperture γ is 0；Slide energy regenerating power initial value of the vehicle under N grades tables look-up to obtain with current time motor MG2 temperature
Modifying factor be multiplied, obtain N grade lower demands and brake regenerative power actual values；That is:
PSlide_reg_N=PSlide_reg_N_ini×δT···············(5)
In formula (5), PSlide_reg_DIt is in for vehicle when sliding energy recuperation mode, N grade time regenerative power actual values,
PSlide_reg_NTo slide N grades of energy recuperation mode lower braking regenerative power initial values, δTFor temperature correction factor；
Vehicle is in and slides energy recuperation mode, is added by sliding energy regenerating power initial value under N grades according to MG2 revolving speed
And the correction amount that motor MG2 relative speed variation is tabled look-up, then the modifying factor tabled look-up with current time motor MG2 temperature
It is multiplied, obtains the demand braking regenerative power actual value under D grades；That is:
PSlide_reg_D=(PSlide_reg_N_ini+αSlide)×δT·················(6)
In formula (6), PSlide_reg_DIt is in for vehicle when sliding energy recuperation mode, D grade time energy regenerating power actual values,
PSlide_reg_N_iniTo slide N grades of energy recuperation mode lower energy regenerating power initial values, αSlideTo slide under energy recuperation mode
Consider the braking power correction amount of engine braking when the braking of vehicle band shelves, δTFor temperature correction factor.
It recovers energy calculation method as it can be seen that the present invention provides a kind of planetary parallel-serial hybrid power automobile brake, based on row
Brake pedal aperture γ, the motor MG2 revolving speed n of planetary parallel-serial hybrid power automobileMG2, automobile speed v and SOC value of battery sentence
Energy recuperation mode locating for disconnected current vehicle, then the mode according to locating for vehicle, calculates separately out vehicle at N grades and D grades
Under Brake energy recovery power.The method of the invention is in view of engine braking and motor MG2 when vehicle band shelves are braked
Influence of the temperature change to vehicle braking regenerative power is provided with reasonable correction amount and temperature correction factor, to solve
Existing planetary parallel-serial hybrid power automobile brake recovers energy the problem that error is larger, precision is not high in calculation method, can
Improve the accuracy and reliability that vehicle braking energy regenerative power calculates.
Claims (1)
- The calculation method 1. a kind of planetary parallel-serial hybrid power automobile brake recovers energy, it is characterised in that: the following steps are included:Step 1, brake pedal aperture γ, motor MG2 revolving speed n are acquired by sensorMG2, automobile speed v and SOC value of battery Etc. state informations；Step 2, according to the brake pedal aperture γ of planetary parallel-serial hybrid power automobile, motor MG2 revolving speed nMG2, automobile speed v And SOC value of battery judges energy recuperation mode locating for current vehicle；Step 2 (a), if meeting Brake energy recovery mode trigger condition, vehicle in formula (1) enters Brake energy recovery mould Formula；In formula (1), γBrk_loFor brake pedal aperture lower limit value, γ under Brake energy recovery modeBrk_hiBrake energy recovery mould Brake pedal aperture upper limit value, n under formulaBrkFor the minimum speed of motor MG2 under Brake energy recovery mode, vBrkFor braking energy Minimum speed, soc required by take-back modelBrk_hiFor the upper limit value of battery SOC under Brake energy recovery mode；Step 2 (b) slides energy recuperation mode trigger condition if meeting in formula (2), vehicle, which enters, slides energy regenerating mould Formula；In formula (2), γSlide_loTo slide brake pedal aperture lower limit value, γ under energy recuperation modeSlide_hiSlide energy regenerating Brake pedal aperture upper limit value, n under modeSlideFor the minimum speed for sliding motor MG2 under energy recuperation mode, vSlideFor system Minimum speed, soc required by energy take-back modelSlide_hiFor the upper limit value for sliding battery SOC under energy recuperation mode；Step 2 (c), if above two mode trigger condition is not satisfied, vehicle enters not take-back model；Step 3, the mode according to locating for vehicle in step 2 calculates separately Brake energy recovery function of the vehicle under N grades and D grades Rate initial value；Step 3 (a), vehicle are in Brake energy recovery mode, the Brake energy recovery power initial value under N grades and D grades PBrk_reg_N_iniBy brake pedal aperture γ and MG2 revolving speed nMG2By tabling look-up to obtain；Step 3 (b), vehicle are in and slide energy recuperation mode, slide energy regenerating power initial value under N grades and D grades PSlide_reg_N_iniIt tables look-up to obtain according to motor MG2 revolving speed and motor MG2 relative speed variation；Step 3 (c), vehicle are in not take-back model, and the energy regenerating power of vehicle is 0 at this time；Step 4, the mode according to locating for vehicle in step 2, it is contemplated that the shadow of gear and motor MG2 temperature change to regenerative power It rings, calculates separately Brake energy recovery power actual value of the vehicle under N grades and D grades；Step 4 (a), vehicle are in Brake energy recovery mode, and the Brake energy recovery power as obtained in step 3 (a) is initial Value is multiplied with the modifying factor that motor MG2 temperature is tabled look-up under current time, and it is practical to obtain N grades of lower demand braking regenerative powers Value；That is:PBrk_reg_N=PBrk_reg_N_ini×δT·················(3)In formula (3), PBrk_reg_NWhen being in Brake energy recovery mode for vehicle, N grades of lower braking regenerative power actual values, PBrk_reg_N_iniFor N grades of Brake energy recovery mode lower braking regenerative power initial values；δTFor temperature correction factor；Vehicle is in Brake energy recovery mode, by the braking regenerative power initial value under N grades add correction amount, then with it is current when It carves the modifying factor that motor MG2 temperature is tabled look-up to be multiplied, obtains the demand braking regenerative power actual value under D grades；That is:PBrk_reg_D=(PBrk_reg_N_ini+αBrk)×δT··················(4)In formula (4), PBrk_reg_DWhen being in Brake energy recovery mode for vehicle, D grades of lower braking regenerative power actual values, PBrk_reg_N_iniFor N grades of Brake energy recovery mode lower braking regenerative power initial values, αBrkTo be examined under Brake energy recovery mode The braking power correction amount of engine braking, δ when considering the braking of vehicle band shelvesTFor temperature correction factor；Step 4 (b), vehicle is in when sliding energy recuperation mode, and driver does not operate brake pedal, and brake pedal is opened Spending γ is 0；Slide energy regenerating power initial value of the vehicle under N grades is repaired with what current time motor MG2 temperature was tabled look-up Positive divisor is multiplied, and obtains N grades of lower demand braking regenerative power actual values；That is:PSlide_reg_N=PSlide_reg_N_ini×δT······················(5)In formula (5), PSlide_reg_DIt is in for vehicle when sliding energy recuperation mode, N grade time regenerative power actual values, PSlide_reg_N To slide N grades of energy recuperation mode lower braking regenerative power initial values, δTFor temperature correction factor；Vehicle is in and slides energy recuperation mode, is added by sliding energy regenerating power initial value under N grades according to MG2 revolving speed and electricity The correction amount that machine MG2 relative speed variation is tabled look-up, then the modifying factor phase tabled look-up with current time motor MG2 temperature Multiply, obtains the demand braking regenerative power actual value under D grades；That is:PSlide_reg_D=(PSlide_reg_N_ini+αSlide)×δT·················(6)In formula (6), PSlide_reg_DIt is in for vehicle when sliding energy recuperation mode, D grade time energy regenerating power actual values, PSlide_reg_N_iniTo slide N grades of energy recuperation mode lower energy regenerating power initial values, αSlideTo slide under energy recuperation mode Consider the braking power correction amount of engine braking when the braking of vehicle band shelves, δTFor temperature correction factor.
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| CN113147727A (en) * | 2021-06-04 | 2021-07-23 | 一汽解放青岛汽车有限公司 | Energy recovery control method for hybrid vehicle, and storage medium |
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