CN103660913B - A kind of single-axle parallel hybrid passenger vehicle energy distributing method - Google Patents
A kind of single-axle parallel hybrid passenger vehicle energy distributing method Download PDFInfo
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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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
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Abstract
The present invention has disclosed a kind of single-axle parallel hybrid passenger vehicle energy distributing method, formulates one group of road condition according to the speed of a motor vehicle-time history statistical information of urban bus, and formulates corresponding a set of optimal control parameter for each road condition; In Vehicle Driving Cycle process, automatically gather the parameter of travelling and judge corresponding road condition, and take corresponding optimal control parameter and energy distribution pattern by entire car controller, moment of torsion output and the energy of optimizing and revising vehicular electric machine and engine reclaim. The present invention can reasonably distribute operating in the city bus single shaft hybrid power passenger car energy, in the situation that carrying AMT gearbox, not only meet the dynamic property of car load, the more important thing is and effectively reduced the consumption of fuel oil and the discharge of pollutant, improved fuel economy.
Description
Technical field
The present invention relates to a kind of energy distributing method of automobile, relate in particular to a kind of single-axle parallel hybrid passenger vehicle energy distributing method, belong to the technical field of hybrid vehicle.
Background technology
Along with the early warning of energy scarcity strengthens gradually, and the immense pressure brought of more and more huger urban transportation fuel consume. New-energy automobile including hybrid power has become the key object of every country research. Hybrid power passenger car, due to good fuel consumption and emission, has very large application space and development potentiality within a period in future. Hybrid vehicle, refers to the vehicle that vehicle drive train is constituted jointly by two or more single drivetrains that can turn round simultaneously, and the road horsepower of vehicle is provided separately or jointly by single drivetrain according to actual vehicle running state. The features such as energy-conservation, the low emission of motor vehicle driven by mixed power have caused the very big concern of motor-dom and have become automotive research and an emphasis of exploitation.
The car load energy management control strategy of hybrid power is to determine whether hybrid power passenger car has a key factor of good fuel consumption and emission. How traffic operating mode for big and medium-sized cities complexity is exported by the moment of torsion of control strategy reasonable distribution motor and engine, becomes the target of design single shaft hybrid power whole passenger vehicle energy distributing method design.
Summary of the invention
In view of the defect of above-mentioned prior art and the existence of application present situation, the object of the invention is to propose a kind of in Vehicle Driving Cycle engineering, can be according to the collection to Vehicle Driving Cycle parameter, automatically select corresponding road condition, thereby take the single shaft hybrid power passenger car energy distributing method of corresponding energy management strategy, to solve the poor problem of current single-axle parallel hybrid passenger vehicle car load energy distribution strategy adaptability for working condition.
An above-mentioned object of the present invention is to provide a kind of single-axle parallel hybrid passenger vehicle energy distributing method, comprises the following steps:
I, formulate one group of road condition according to the speed of a motor vehicle-time history statistical information of urban bus, and formulate corresponding a set of optimal control parameter for each road condition;
II, automatically gather the parameter of travelling judge corresponding road condition in Vehicle Driving Cycle process, and take corresponding optimal control parameter and energy distribution pattern by entire car controller, moment of torsion output and the energy of optimizing and revising vehicular electric machine and engine reclaim.
Further, aforesaid single-axle parallel hybrid passenger vehicle energy distributing method, described energy distribution pattern comprises:
Shutdown mode, hybrid power passenger car is in the time stopping, and engine shutdown, to cancel idling operation, carries out power-on self-test initialization before vehicle launch, detects the original state of vehicle, normally starts automobile and enters drive pattern;
Drive pattern, comprises, low load region: electrokinetic cell electric weight SOC is greater than battery and demarcates electric weight lower limit SOClow, and vehicle traction moment of torsion is less than the peak torque that motor can provide, and vehicle adopts pure motorized motions, and by entire car controller, HCU controls, cut-off clutch, tail-off, electrokinetic cell is powered to motor; Electrokinetic cell electric weight SOC is less than battery and demarcates electric weight lower limit SOClow, vehicle is carried out pure motor driven, in conjunction with clutch, and the charging of the every trade of going forward side by side car;
Optimize district: when vehicle traction moment of torsion is greater than engine high-efficiency rate district minimum torque curve values, and while being less than or equal to high efficient area Optimum Economic torque curve value, HCU controls by entire car controller, and in conjunction with clutch, ato unit, carries out engine and drive separately; The current electric quantity of electrokinetic cell is lower than the lower limit of demarcating electric weight, driven by engine motor, the charge mode of driving a vehicle; When vehicle traction moment of torsion is greater than high efficient area Optimum Economic torque curve, and while being less than or equal to the highest torque curve value in engine high-efficiency rate district, engine torque is controlled to Optimum Economic curve place, all the other moments of torsion are provided by motor, and vehicle is carried out associating driving;
High load region: in the time that vehicle traction moment of torsion is greater than the highest torque curve value in engine high-efficiency rate district,, meet under the prerequisite of demarcating variable at electrokinetic cell in conjunction with clutch by entire car controller HCU, motor provides peak torque, all the other are provided by engine, and vehicle is carried out pure motor driven;
Braking mode, vehicle traction moment of torsion makes zero, and adopts brake measure to reduce hybrid power passenger car kinetic energy;
And limp-home mode, control system fault, entire car controller HCU control engine enters failure operation pattern, and vehicle continues safe operation and carries out troubleshooting until reach home. .
Further, aforesaid single-axle parallel hybrid passenger vehicle energy distributing method, described braking mode is pure mechanical braking: when the current electric quantity of power cell of vehicle equals to demarcate the higher limit of electric weight, vehicle carries out pure mechanical braking, and kinetic energy is all converted to thermal energy consumption.
Further, aforesaid single-axle parallel hybrid passenger vehicle energy distributing method, described braking mode is regenerative braking: the current electric quantity of power cell of vehicle is less than the higher limit of demarcating electric weight, vehicle is according to severity of braking, reasonable distribution motor regenerative braking moment and mechanical braking moment, now motor becomes engine, and electrokinetic cell is in charged state.
Further, aforesaid single-axle parallel hybrid passenger vehicle energy distributing method, the establishing method of the real-time energy distribution of described car load comprises the following steps:
I, vehicle connect electricity and initialize detection, judge car load situation; In instrument, point out DTC, carry out trouble of shutdown processing, instrument shows normal, and vehicle enters drive pattern or braking mode;
II, vehicle enter start-up mode, system automatic decision electrokinetic cell electric weight SOC; Electrokinetic cell electric weight SOC is less than battery and demarcates electric weight lower limit SOClow, carry out motor driven, meanwhile, entire car controller sends request motor negative torque signal to electric machine controller, sends charging signals to battery controller, enters driving charge mode; System judges that electrokinetic cell electric weight SOC is greater than battery and demarcates electric weight lower limit SOClow, carry out pure motorized motions;
III, vehicle, travelling in engineering, by entire car controller, carry out the collection of the speed of a motor vehicle, tach signal; analytic signal data; carry out road condition selection, enter car load energy distribution controlled state, in the time that vehicle is met long-time red light or stopped; enter shutdown mode; now tail-off, while again starting, vehicle directly enters drive pattern; vehicle, in the time slowing down, enters braking mode.
It compares to the present invention the outstanding beneficial effect that prior art has and is:
The energy distributing method of single-axle parallel hybrid passenger vehicle provided by the invention, by the analysis of the speed of a motor vehicle-time history statistical information to urban bus, to the collection of the parameter of travelling, intelligent selection road condition, determine corresponding control parameter, thereby carry out the energy distribution of car load. This kind of energy distributing method, in ensureing to realize the various mode of operation switchover operations of single-axle parallel hybrid passenger vehicle, integrated vehicle control tactics when travelling has better adapted to traffic operating mode at that time, has further improved the fuel consumption and emission of car load. The present invention all improves significantly for adaptability for working condition, car load fuel economy and the emission performance of city hybrid power passenger car, has significant technique effect.
Brief description of the drawings
Fig. 1 is FB(flow block) of the present invention.
Fig. 2 is the flow chart of drive pattern of the present invention.
Fig. 3 is the flow chart of braking mode of the present invention.
Detailed description of the invention
The invention provides a kind of single-axle parallel hybrid passenger vehicle energy distributing method, as shown in Figure 1, Figure 2 and Figure 3: for the poor feature of current single-axle parallel hybrid passenger vehicle car load energy distribution strategy adaptability for working condition, according to the speed of a motor vehicle-time history statistical information of urban bus, formulate road condition system. Vehicle, travelling in engineering, according to the collection to Vehicle Driving Cycle parameter, is selected corresponding road condition automatically, thereby takes corresponding energy management strategy.
To different road conditions and car load situation, set the real-time energy distributing method of car load:
Vehicle powers on and initializes detection, judges that whether the situation of car load is normal. If point out DTC in instrument, carry out trouble of shutdown processing. If normal, vehicle enters drive pattern or braking mode.
Further, vehicle enters start-up mode, and the electric weight of system automatic decision electrokinetic cell is demarcated electric weight lower limit SOC if electrokinetic cell electric weight SOC is less than batterylow, carrying out motor driven, entire car controller HCU controls Clutch Control, in conjunction with clutch, carries out motor driven. Meanwhile, entire car controller HCU sends request motor negative torque signal to electric machine controller, sends charging signals to battery controller, enters driving charge mode, now, and vehicle start success.
Further, vehicle is travelling in engineering, by entire car controller HCU, carry out the collection of the signals such as the speed of a motor vehicle, rotating speed, analyze these signals, carry out road condition selection, meanwhile, due to the corresponding one group of car load control parameter of each operating mode, enter afterwards car load energy distribution controlled state. In the time that vehicle runs into long red light or stops, vehicle enters shutdown mode, now tail-off. By the time, while again starting, vehicle just directly enters drive pattern.
Further, vehicle enters drive pattern low load region, and system judges that electrokinetic cell electric weight SOC is greater than battery and demarcates electric weight lower limit SOClow, carry out motorized motions. Now entire car controller sends cut-off command to engine controller, and cut-off clutch sends motor positive-torque signal to electric machine controller, carries out electric-only mode.
Further, along with the raising of the speed of a motor vehicle, vehicle enters drive pattern and optimizes district. When driving in the time that vehicle traction torque T D is greater than engine high-efficiency rate district minimum torque curve values T1 and be less than or equal to high efficient area Optimum Economic torque curve value Topt, entire car controller sends to engine controller the signal of piloting engine, in conjunction with clutch, carry out engine to electric machine controller transmission disable motor and drive separately. If the current electric quantity of electrokinetic cell is lower than the lower limit of demarcating electric weight, actuating motor, gives negative torque, the charge mode of driving a vehicle. In the time that vehicle traction torque T D is greater than high efficient area Optimum Economic torque curve value Topt and is less than or equal to engine high-efficiency rate district the highest torque curve value T2, now entire car controller passes through to engine control transmitted signal, engine torque is controlled to Optimum Economic curve values Topt place, all the other moments of torsion provide by motor, and now vehicle is carried out associating driving.
Further, Vehicle Driving Cycle enters drive pattern high load region. Vehicle traction torque T D is greater than engine high-efficiency rate district the highest torque curve value T2, and entire car controller sends request motor to electric machine controller peak torque signal is provided, and all the other moments of torsion are all provided by engine. Now, vehicle is carried out associating driving.
Vehicle, in the time slowing down, enter braking mode, as shown in Figure 3. First entire car controller, according to the brake pedal signal receiving, determines whether brake hard. If brake hard, carries out pure mechanical braking pattern. If not brake hard, judges whether electrokinetic cell electric weight reaches battery and demarcate electric weight higher limit SOChighIf, do not reach, carry out braking energy take-back model. Vehicle control unit controls cut-off clutch, starts to ask motor negative torque signal to electric machine controller, and now vehicle carries out braking energy recovery, and electrokinetic cell starts charging.
When in the process that vehicle is driving, braking, if break down, vehicle enters limp-home mode. Now, vehicle control unit controls engine enters failure operation pattern, can ensure that vehicle continues safe operation a period of time, reaches home and carries out troubleshooting.
Use energy distributing method of the present invention, first will investigate and set up road condition system, make the control parameter of different road condition systems. In Vehicle Driving Cycle process, the Real-time Collection parameter of travelling, road condition is selected automatically, utilize the change of controlling parameter to carry out corresponding energy management control strategy, the moment of torsion output of motor and engine is controlled to optimum state, final optimization pass the fuel consumption and emission of hybrid power car load. Vehicle adopts single shaft parallel architecture, on power transmission chain, be followed successively by engine, clutch, motor and mechanical automatic gearbox, motor is connected by electric machine controller with electrokinetic cell, battery controller control electrokinetic cell, all parts control module is realized intercommunication mutually by CAN bus with entire car controller HCU. The single-axle parallel hybrid passenger vehicle of this structure can be realized pure motor driving, pure motor driven, combination drive, driving charging and braking energy and reclaim five kinds of mode of operations.
The energy distributing method of single-axle parallel hybrid passenger vehicle provided by the invention, by the analysis of the speed of a motor vehicle-time history statistical information to urban bus, to the collection of the parameter of travelling, intelligent selection road condition, determine corresponding control parameter, thereby carry out the energy distribution of car load. This kind of energy distributing method, in ensureing to realize the various mode of operation switchover operations of single-axle parallel hybrid passenger vehicle, integrated vehicle control tactics when travelling has better adapted to traffic operating mode at that time, has further improved the fuel consumption and emission of car load. The present invention all improves significantly for adaptability for working condition, car load fuel economy and the emission performance of city hybrid power passenger car, has significant technique effect.
In addition to the implementation, the present invention can also have other embodiments. All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1. a single-axle parallel hybrid passenger vehicle energy distributing method, is characterized in that comprising the following steps:
I, formulate one group of road condition according to the speed of a motor vehicle-time history statistical information of urban bus, and formulate corresponding a set of optimal control parameter for each road condition;
II, automatically gather the parameter of travelling judge corresponding road condition in Vehicle Driving Cycle process, and take corresponding optimal control parameter and energy distribution pattern by entire car controller, moment of torsion output and the energy of optimizing and revising vehicular electric machine and engine reclaim;
Described energy distribution pattern comprises:
Shutdown mode, hybrid power passenger car is in the time stopping, and engine shutdown, to cancel idling operation, carries out power-on self-test initialization before vehicle launch, detects the original state of vehicle, normally starts automobile and enters drive pattern;
Drive pattern, comprises, low load region: electrokinetic cell electric weight SOC is greater than battery and demarcates electric weight lower limit SOClow, and vehicle traction moment of torsion is less than the peak torque that motor can provide, and vehicle adopts pure motorized motions, and by entire car controller, HCU controls, cut-off clutch, tail-off, electrokinetic cell is powered to motor; Electrokinetic cell electric weight SOC is less than battery and demarcates electric weight lower limit SOClow, vehicle is carried out pure motor driven, in conjunction with clutch, and the charging of the every trade of going forward side by side car;
Optimize district: when vehicle traction moment of torsion is greater than engine high-efficiency rate district minimum torque curve values, and while being less than or equal to high efficient area Optimum Economic torque curve value, HCU controls by entire car controller, and in conjunction with clutch, ato unit, carries out engine and drive separately; The current electric quantity of electrokinetic cell is lower than the lower limit of demarcating electric weight, driven by engine motor, the charge mode of driving a vehicle; When vehicle traction moment of torsion is greater than high efficient area Optimum Economic torque curve, and while being less than or equal to the highest torque curve value in engine high-efficiency rate district, engine torque is controlled to Optimum Economic curve place, all the other moments of torsion are provided by motor, and vehicle is carried out associating driving;
High load region: in the time that vehicle traction moment of torsion is greater than the highest torque curve value in engine high-efficiency rate district,, meet under the prerequisite of demarcating variable at electrokinetic cell in conjunction with clutch by entire car controller HCU, motor provides peak torque, all the other are provided by engine, and vehicle is carried out associating driving;
Braking mode, vehicle traction moment of torsion makes zero, and adopts brake measure to reduce hybrid power passenger car kinetic energy;
And limp-home mode, control system fault, entire car controller HCU control engine enters failure operation pattern, and vehicle continues safe operation and carries out troubleshooting until reach home.
2. single-axle parallel hybrid passenger vehicle energy distributing method according to claim 1, is characterized in that: described braking mode is
Pure mechanical braking: when the current electric quantity of power cell of vehicle equals to demarcate the higher limit of electric weight, vehicle carries out pure mechanical braking, and kinetic energy is all converted to thermal energy consumption.
3. single-axle parallel hybrid passenger vehicle energy distributing method according to claim 1, it is characterized in that: described braking mode is regenerative braking: the current electric quantity of power cell of vehicle is less than the higher limit of demarcating electric weight, vehicle is according to severity of braking, reasonable distribution motor regenerative braking moment and mechanical braking moment, now motor becomes engine, and electrokinetic cell is in charged state.
4. single-axle parallel hybrid passenger vehicle energy distributing method according to claim 1, is characterized in that: the establishing method of the real-time energy distribution of described car load comprises the following steps:
I, vehicle connect electricity and initialize detection, judge car load situation; In instrument, point out DTC, carry out trouble of shutdown processing, instrument shows normal, and vehicle enters drive pattern or braking mode;
II, vehicle enter start-up mode, system automatic decision electrokinetic cell electric weight SOC; Electrokinetic cell electric weight SOC is less than battery and demarcates electric weight lower limit SOClow, carry out motor driven, meanwhile, entire car controller sends request motor negative torque signal to electric machine controller, sends charging signals to battery controller, enters driving charge mode; System judges that electrokinetic cell electric weight SOC is greater than battery and demarcates electric weight lower limit SOClow, carry out pure motorized motions;
III, vehicle, travelling in engineering, by entire car controller, carry out the collection of the speed of a motor vehicle, tach signal; analytic signal data; carry out road condition selection, enter car load energy distribution controlled state, in the time that vehicle is met long-time red light or stopped; enter shutdown mode; now tail-off, while again starting, vehicle directly enters drive pattern; vehicle, in the time slowing down, enters braking mode.
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| CN104773158B (en) * | 2015-04-07 | 2018-06-15 | 安徽易佳斯动力科技有限公司 | For the control method of the multi power source power assembly of vehicle |
| CN104890669B (en) * | 2015-06-10 | 2017-12-12 | 安徽工业大学 | A kind of hybrid power automobile power assembly control method |
| CN106945503A (en) * | 2017-04-27 | 2017-07-14 | 南京锐意泰克汽车科技有限公司 | A kind of tandem plug-in mixed power automobile driving system and its driving method |
| CN111038488B (en) * | 2018-10-12 | 2021-05-14 | 郑州宇通客车股份有限公司 | Energy optimization control method and device for hybrid electric vehicle |
| CN109177968B (en) * | 2018-11-06 | 2020-02-07 | 吉林大学 | Drive mode control method of power split type hybrid electric vehicle |
| CN111645666B (en) * | 2019-09-20 | 2021-07-23 | 长城汽车股份有限公司 | Torque control method and control device for engine |
| CN111890947B (en) * | 2020-07-17 | 2022-01-25 | 北京国家新能源汽车技术创新中心有限公司 | Brake control method of pure electric vehicle in automatic driving mode |
| CN112224372B (en) * | 2020-09-16 | 2022-06-21 | 中船动力研究院有限公司 | Hybrid electric propulsion system and starting method thereof |
| CN112721934A (en) * | 2021-02-01 | 2021-04-30 | 集瑞联合重工有限公司 | Vehicle power mode adjusting method, device and system |
| CN113335083A (en) * | 2021-07-21 | 2021-09-03 | 东蒲联合科技(福建)有限责任公司 | Energy allocation method for range-extended electric cold-chain logistics vehicle and logistics vehicle |
| CN113415163A (en) * | 2021-07-30 | 2021-09-21 | 东风商用车有限公司 | Low-voltage power supply system of hybrid electric vehicle, control method and hybrid electric vehicle |
| CN113978447B (en) * | 2021-10-27 | 2024-01-09 | 岚图汽车科技有限公司 | Torque control method and related equipment |
| CN117681856B (en) * | 2024-02-04 | 2024-05-07 | 西南交通大学 | Energy management control method based on whole vehicle torque demand and electric quantity state |
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