CN102874107B - A kind of range extended electric vehicle power system adopting dual clutch transmission - Google Patents
A kind of range extended electric vehicle power system adopting dual clutch transmission Download PDFInfo
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- CN102874107B CN102874107B CN201210346093.4A CN201210346093A CN102874107B CN 102874107 B CN102874107 B CN 102874107B CN 201210346093 A CN201210346093 A CN 201210346093A CN 102874107 B CN102874107 B CN 102874107B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Abstract
The present invention relates to a kind of range extended electric vehicle power system adopting dual clutch transmission, it is characterized in that: the bent axle of combustion engine is connected with the first dual clutch transmission housing.The first clutch of the first dual clutch transmission is connected with the second dual clutch transmission second clutch by transmission shaft; The second clutch of the first dual clutch transmission is connected with the first motor rotor; Second motor rotor is connected with the second dual clutch transmission housing by transmission shaft; By controlling separation or the combination of the second dual clutch transmission two power-transfer clutchs, controlling two cover change gear mechanism outputting powers respectively, two gears can be realized.Primarily of the second motor car during low speed driving, avoid low engine speed, underload work, improve car load economy and emission performance; When running at high speed, power system parallel running drives vehicle, and energy transfer efficiency is high, on the basis ensureing car load dynamic property, extends the continual mileage of vehicle further.
Description
Technical field
The present invention relates to a kind of range extended electric vehicle power system adopting dual clutch transmission, particularly there are combustion engine and two electrical motors and the range extended electric vehicle power system of internal combustion engine drive and direct motor drive can be carried out.
Background technology
Become today of China Automobile Industry theme at energy saving standard, hybrid vehicle has become the object of automobile vendor of various countries primary study.Hybrid vehicle (HybridElectricalVehicle is called for short HEV) refers to the automobile simultaneously equipping two kinds of power resources-heat dynamic resources (being produced by traditional spark ignition engine or diesel engine) and electrodynamic source (electrokinetic cell and electrical motor).Hybrid vehicle does not need external charge; take driving engine as the electronlmobil of main power source; by hybrid power functions such as engine idle shutdown, Brake energy recovery, low speed pure motor driving, driving generating, driving power-assisted and driving engine drive separately; make driving engine can according to the actual operating mode flexible modulation of car load; work in the region remaining on Combination property the best, thus reduce oil consumption and discharge.
Compared with hybrid vehicle, pure electric automobile (BatteryElectricvehicle is called for short BEV) relies on electric motor car completely, and its energy source, from electrical network, achieves zero-emission, and efficiency is high, and noise is little.But limit by current driving force battery technology level, its energy density can't meet automobile-used demand, and car load continual mileage is limited, the requirement of user's routine use can not be met.
In order to extend the continual mileage of pure electric automobile, people add a high efficiency internal combustion engine in power system of electric automobile, and when electrokinetic cell voltage reduces, it can drive power electric generators, reaches the object of extending driving range with this.This kind of battery-driven car is called as stroke-increasing electric automobile (Range-extendedElectricVehicle is called for short REEV).According to power system architecture, the stroke-increasing electric automobile existed at present can be divided into series connection stroke boosting electronlmobil and series-parallel connection stroke-increasing electric automobile.It is comparatively large that series connection stroke boosting electronlmobil increases advantage in (comparing with traditional vehicle) at cost, and under electric quantity maintaining stage, dynamic property is difficult to meet vehicle performance requirement, and fuel economy of running at high speed is also poor.Series-parallel connection stroke-increasing electric automobile dynamic property and oil consumption under electric quantity maintaining stage are all better than series connection stroke boosting electronlmobil, but power system is complicated, cost is higher;
There is following problem at present:
(1) because the combustion engine of traditional vehicle (or hybrid vehicle) needs to be operated in bottom gear with full
Foot accelerates demand, and the low and load of its rate of load condensate and rotation speed change soon, affect car load economy;
(2) in existing hybrid power configuration, motor is mainly used to the work area regulating combustion engine, thus make combustion engine as far as possible in the work of Optimum Economic interval, the power driving vehicle to need still provides primarily of combustion engine, therefore the power of combustion engine is very large, affects car load economy and emission performance;
(3) in existing hybrid power configuration, first motorjbrm generally has two kinds, and ISG (IntegratedStarterGenerator) BSG(BeltStarterGenerator), they are directly connected with combustion engine usually, can them be driven to rotate during internal combustion engine always, this not only can produce mechanical friction loss, also can produce electromagnetism loss, affect car load economy;
(4) although pure electric automobile can realize zero consumption of fuel and zero-emission, due to the volume of electrokinetic cell and the restriction of energy density, its continual mileage is very limited;
(5), under increasing journey pattern, there is energy secondary conversion loss, affect car load economy in series connection stroke boosting electronlmobil.
Summary of the invention
The object of the present invention is to provide a kind of range extended electric vehicle power system adopting dual clutch transmission, it adopts the second electrical motor of the combustion engine of a miniwatt grade and a high-power grade.Prevent drive first electrical motor from rotating when internal combustion engine drive, the loss due to friction and the electromagnetism that decrease the first electrical motor lose.By two cover change gear mechanisms for the second electrical motor provides two grades of transmitting ratios, car load dynamic property demand is met by the second electrical motor, reduces the power of combustion engine, improves the rate of load condensate of combustion engine, improves car load economy and emission performance.When electrokinetic cell electricity is not enough, tandem drive vehicle during low speed, by internal combustion engine drive first electrical motor to power battery charging, maintains electric quantity balancing; Parallel drive vehicle during high speed, energy transfer efficiency is high, on the basis ensureing car load dynamic property, extends the continual mileage of vehicle further.
Technical scheme of the present invention is achieved in that a kind of range extended electric vehicle power system adopting dual clutch transmission, be made up of combustion engine, the first electrical motor, the second electrical motor, two dual clutch transmissions and two cover change gear mechanisms, wherein the second dual clutch transmission can be used for shifting gears; It is characterized in that: the bent axle of combustion engine is connected with the first dual clutch transmission housing.The first clutch of the first dual clutch transmission is connected with the second dual clutch transmission second clutch by transmission shaft; The second clutch of the first dual clutch transmission is connected with the first motor rotor; Second motor rotor is connected with the second dual clutch transmission housing by transmission shaft; By controlling separation or the combination of the second dual clutch transmission two power-transfer clutchs, controlling two cover change gear mechanism outputting powers respectively, two gears can be realized.
Described combustion engine is used for meeting the demand of driving power that vehicle high-speed at the uniform velocity travels and electrical accessory consumed power.
The power of the first described electrical motor is used for starting combustion engine, and meets electrokinetic cell SOC balance and electrical accessory electrical energy demands.
The second described motor power (output) is determined by car load dynamic property, and by controlling the second dual clutch transmission and two cover change gear mechanisms, realize two gears, one grade meets max. climb slope requirement, and second gear meets maximum speed requirement.
The second described motor rotor is connected with the second dual clutch transmission housing by transmission shaft, when the first clutch of the second dual clutch transmission combines, second clutch is separated, and power is exported by first stud gear mechanism, and the transmitting ratio of first stud gear mechanism equals 1(second gear); When the first clutch of the second dual clutch transmission is separated, second clutch combines, and power is exported by second stud gear mechanism, and the transmitting ratio of second stud gear mechanism is greater than 1(mono-grade).
The second described electrical motor can by one grade and second gear transmitting ratio outputting power, and combustion engine can only pass through second gear transmitting ratio outputting power.
The first described dual clutch transmission first clutch combines, and carries out transmission of power between combustion engine and the second electrical motor, and the first dual clutch transmission first clutch is separated, and between combustion engine and the second electrical motor, transmission of power disconnects; First dual clutch transmission second clutch combines, transmission of power is carried out between combustion engine and the first electrical motor, first dual clutch transmission second clutch is separated, between combustion engine and the first electrical motor, transmission of power disconnects, also can cancel the first dual clutch transmission second clutch, the first electrical motor becomes to be rigidly connected with the housing of the first dual clutch transmission.
Described power system comprises following mode of operation:
A) when starting combustion engine, the first clutch of the first dual clutch transmission is separated, and the second clutch of the first dual clutch transmission combines, by the first motor starting combustion engine.
B) when vehicle start, the first clutch of the first dual clutch transmission is separated, and between combustion engine and the second electrical motor, transmission of power disconnects, and the independent forward drive of the second electrical motor, power system is with electric-only mode work.
C) low vehicle speeds or the efficiency of internal combustion engine lower time, the first clutch of the first dual clutch transmission is separated, and the second electrical motor drives vehicle separately.According to electrokinetic cell dump energy, in conjunction with the second clutch of the first dual clutch transmission, can be generated electricity by internal combustion engine drive first electrical motor, realize power system with series model work.
D) when vehicle suddenly gives it the gun, the first clutch of the first dual clutch transmission combines, and the second clutch of the first dual clutch transmission is separated, and combustion engine and the second electrical motor drive vehicle simultaneously, and power system is with paralleling model work.
E) when vehicle at the uniform velocity travels and the efficiency of internal combustion engine is higher, the first clutch of the first dual clutch transmission combines, by IC engine-powered vehicles.According to electrokinetic cell dump energy: in conjunction with the second clutch of the first dual clutch transmission, can be generated electricity by internal combustion engine drive first electrical motor, realize electrokinetic cell energy equilibrium; Also the second clutch of separable first dual clutch transmission, the first motor stall, reduces loss due to friction and the electromagnetism loss of the first electrical motor.
F) in car retardation traveling or when braking, the first clutch of the first dual clutch transmission is separated, and disconnect transmission of power between combustion engine and the second electrical motor, the second electrical motor is to power battery charging.
G) when vehicle backing travels, the first clutch of the first dual clutch transmission is separated, and disconnect transmission of power between combustion engine and the second electrical motor, the second electrical motor works independently, and contrarotation drives vehicle.
Described combustion engine, the first dual clutch transmission and the first electrical motor can be cancelled, and power system works as pure electric vehicle power system always under electric-only mode.
Good effect of the present invention adopts two-speed transmission, for the second electrical motor provides two transmitting ratios, reduces vehicle to the second motor torque demand, reduce the second electrical motor volume; First electrical motor, the second electrical motor, two-speed transmission Integration Design, make system architecture compacter, realizes the lightweight of power system; Compare same level hybrid vehicle, power of IC engine is little, improves the rate of load condensate of combustion engine when vehicle travels; When the second clutch of the first dual clutch transmission is separated, prevent from during internal combustion engine drive, driving the first electrical motor to rotate, decrease loss due to friction and the electromagnetism loss of the first electrical motor, thus improve the fuel economy of car load; When cancelling the second clutch of the first dual clutch transmission, power system architecture is compacter, can reduce integral vehicle cost.During low vehicle speeds, power system can be pure electronic or series model work; During high vehicle speeds, power system can be electric-only mode work, also can in conjunction with the first dual clutch transmission first clutch, driving engine is made to participate in vehicular drive, now power system energy transfer efficiency is high, on the basis ensureing car load dynamic property, the continual mileage of vehicle can be extended further.Based on power system of the present invention, combustion engine, the first dual clutch transmission and the first electrical motor can be cancelled, power system works always under electric-only mode, the present invention develops into a kind of pure electric vehicle power system, can realize the dynamical system altogether platform of stroke-increasing electric automobile and pure electric automobile.
Accompanying drawing explanation
Figure 1 shows that range extended electric vehicle power system structural representation.
Figure 2 shows that two kinds of working stages of power system.Wherein SOC is the state-of-charge of electrokinetic cell.SOC is high, illustrates that electrokinetic cell electricity is sufficient; SOC is low, illustrates that electrokinetic cell electricity is not enough.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described: as shown in Figure 1, a kind of range extended electric vehicle power system adopting dual clutch transmission, by combustion engine 1, first dual clutch transmission housing 2, first dual clutch transmission first clutch 3, first dual clutch transmission second clutch 4, second stud gear mechanism 5, first stud gear mechanism 6, second dual clutch transmission housing 7, second dual clutch transmission first clutch 8, second dual clutch transmission second clutch 9, second motor stator 10, second motor rotor 11, transmission shaft 12, second stud gear mechanism 13, first stud gear mechanism 14, power output gear 15, power output gear 16, first motor stator 17, first motor rotor 18 forms.
The bent axle of combustion engine 1 is connected with the first dual clutch transmission housing 2.The first clutch 3 of the first dual clutch transmission is connected with the second dual clutch transmission second clutch 9 by transmission shaft 12.The second clutch 4 of the first dual clutch transmission is connected with the first motor rotor 18.Second motor rotor 11 is connected with the second dual clutch transmission housing 7 by transmission shaft.
First dual clutch transmission second clutch 4 combines, and carries out transmission of power between combustion engine 1 and the first motor rotor 18; Second clutch 4 is separated, and between combustion engine 1 and the first motor rotor 18, transmission of power disconnects.
First dual clutch transmission first clutch 3 combines, and carries out transmission of power between combustion engine 1 and the second motor rotor 11; First clutch 3 is separated, and between combustion engine 1 and the second motor rotor 11, transmission of power disconnects.
Second dual clutch transmission first clutch 8 combines, and second clutch 9 is separated, and power is exported by first stud gear mechanism 6, for the second electrical motor provides the transmitting ratio (second gear) equaling 1.
Second dual clutch transmission second clutch 9 combines, and first clutch 8 is separated, and power is exported by second stud gear mechanism 5, for the second electrical motor provides the transmitting ratio (a grade) being greater than 1.
As shown in Figure 2, according to power battery charged state (SOC), power system has two working stages: electric quantity consumption (CD) stage and electricity maintain (CS) stage.When electrokinetic cell electricity is sufficient, power system operational is in the CD stage, and when electrokinetic cell electricity is reduced to a certain degree, power system enters into the CS stage.Under the CD stage, power system has following several mode of operation: low speed electric-only mode, high speed electric-only mode, the independent drive pattern of high-speed internal combustion engine and high-speed joint drive pattern.Under the CS stage, power system has following several mode of operation: low speed series model, high speed traveling power generation mode, the independent drive pattern of high-speed internal combustion engine and high-speed joint drive pattern, as shown in the table.
Under electric-only mode, combustion engine 1 quits work, and the first dual clutch transmission first clutch 3 is separated, the first motor stall, and the second electrical motor drives separately vehicle to travel.
Under series model, combustion engine 1 works, and the first dual clutch transmission first clutch 3 is separated, and the first dual clutch transmission second clutch 4 combines, and the first electrical motor generating, the second electrical motor drives separately vehicle to travel.
Under driving power generation mode, combustion engine 1 works, and the first dual clutch transmission first clutch 3 combines, and the first dual clutch transmission second clutch 4 combines, and the first electrical motor generating, the second electrical motor is with turning, and combustion engine 1 drives vehicle to travel.
Under the independent drive pattern of combustion engine, combustion engine 1 works, and the first dual clutch transmission first clutch 3 combines, first dual clutch transmission second clutch 4 is separated, first motor stall, the second electrical motor is with turning, and combustion engine (1) drives vehicle to travel.
Under associating drive pattern, combustion engine 1 works, and the first dual clutch transmission first clutch 3 combines, and the first dual clutch transmission second clutch 4 is separated, the first motor stall, and the second electrical motor and combustion engine 1 are combined driving vehicle and travelled.
In the concrete driving process of vehicle, the mode of operation of this power system is specific as follows:
A) when starting combustion engine 1, the first clutch 3 of the first dual clutch transmission is separated, and the second clutch 4 of the first dual clutch transmission combines, by the first motor starting combustion engine 1.
B) when vehicle start, the first clutch 3 of the first dual clutch transmission is separated, and between combustion engine 1 and the second electrical motor, transmission of power disconnects, and the independent forward drive of the second electrical motor, power system is with electric-only mode work.
C) low vehicle speeds or combustion engine 1 efficiency lower time, the first clutch 3 of the first dual clutch transmission is separated, and the second electrical motor drives vehicle separately.According to electrokinetic cell dump energy, in conjunction with the second clutch 4 of the first dual clutch transmission, the first electrical motor can be driven to generate electricity by combustion engine 1, realizes power system with series model work.
D) when vehicle suddenly gives it the gun, the first clutch 3 of the first dual clutch transmission combines, and the second clutch 4 of the first dual clutch transmission is separated, and combustion engine 1 and the second electrical motor drive vehicle simultaneously, and power system is with paralleling model work.
E) when vehicle at the uniform velocity travels and combustion engine 1 efficiency is higher, the first clutch 3 of the first dual clutch transmission combines, and drives vehicle by combustion engine 1.According to electrokinetic cell dump energy: in conjunction with the second clutch 4 of the first dual clutch transmission, the first electrical motor can be driven to generate electricity by combustion engine 1, realize electrokinetic cell energy equilibrium; Also second clutch 4, first motor stall of separable first dual clutch transmission, reduces loss due to friction and the electromagnetism loss of the first electrical motor.
F) to travel or when braking, the first clutch 3 of the first dual clutch transmission is separated at car retardation, disconnect transmission of power between combustion engine 1 and the second electrical motor, the second electrical motor is to power battery charging.
G) when vehicle backing travels, the first clutch 3 of the first dual clutch transmission is separated, and disconnect transmission of power between combustion engine 1 and the second electrical motor, the second electrical motor works independently, and contrarotation drives vehicle.
Claims (3)
1.
adopt a range extended electric vehicle power system for dual clutch transmission, be made up of combustion engine, the first electrical motor, the second electrical motor, two dual clutch transmissions and two cover change gear mechanisms, wherein the second dual clutch transmission is used for shifting gears; It is characterized in that: the bent axle of combustion engine is connected with the first dual clutch transmission housing, the first clutch of the first dual clutch transmission is connected with the second dual clutch transmission second clutch by the first transmission shaft; The second clutch of the first dual clutch transmission is connected with the first motor rotor; Second motor rotor is connected with the second dual clutch transmission housing by second driving shaft; By controlling separation or the combination of the second dual clutch transmission two power-transfer clutchs, control two cover change gear mechanism outputting powers respectively, realize two gears, the second described electrical motor is selectively by one grade or second gear transmitting ratio outputting power, and combustion engine can only pass through second gear transmitting ratio outputting power.
2. a kind of range extended electric vehicle power system adopting dual clutch transmission according to claim 1, is characterized in that described combustion engine is used for meeting the demand of driving power that vehicle high-speed at the uniform velocity travels and electrical accessory consumed power.
3. a kind of range extended electric vehicle power system adopting dual clutch transmission according to claim 1, it is characterized in that the second described motor power (output) is determined by car load dynamic property, by controlling the second dual clutch transmission and two cover change gear mechanisms, realize two gears, one grade meets max. climb slope requirement, and second gear meets maximum speed requirement.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103358920A (en) * | 2013-07-02 | 2013-10-23 | 常州昊康新能源科技有限公司 | Extended-range type driving system of electrombile |
| CN106915245B (en) * | 2015-12-25 | 2020-08-07 | 比亚迪股份有限公司 | Power driving system and vehicle with same |
| CN106915246B (en) * | 2015-12-25 | 2020-08-07 | 比亚迪股份有限公司 | Power driving system and vehicle with same |
| CN106915240B (en) * | 2015-12-25 | 2020-08-07 | 比亚迪股份有限公司 | Power driving system and vehicle with same |
| CN107234964B (en) * | 2016-03-29 | 2020-03-13 | 上海中科深江电动车辆有限公司 | Hybrid power device |
| CN109986955B (en) * | 2017-12-29 | 2022-05-13 | 比亚迪股份有限公司 | Power driving system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203032381U (en) * | 2012-09-18 | 2013-07-03 | 中国第一汽车股份有限公司 | Range extended electric vehicle (REEV) power system provided with dual clutch transmission device |
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| CN101204925A (en) * | 2006-12-19 | 2008-06-25 | 比亚迪股份有限公司 | Electric motor vehicle driving system |
| CN101659203A (en) * | 2008-08-28 | 2010-03-03 | 比亚迪股份有限公司 | Hybrid power driving system and driving method thereof |
| CN201291754Y (en) * | 2008-09-27 | 2009-08-19 | 比亚迪股份有限公司 | Hybrid power drive system |
| CN101920652B (en) * | 2009-06-17 | 2014-06-25 | 上海捷能汽车技术有限公司 | Series/parallel double-motor and multi-clutch hybrid drive unit for vehicle |
| JP2011025911A (en) * | 2009-06-24 | 2011-02-10 | Honda Motor Co Ltd | Automatic transmission for hybrid vehicle |
| CN102259584B (en) * | 2010-05-31 | 2014-07-02 | 比亚迪股份有限公司 | Hybrid power driven system and vehicle comprising same |
| CN102490586B (en) * | 2011-11-25 | 2014-07-30 | 天津中德传动有限公司 | Energy-saving environmental-friendly hybrid power transmission mechanism |
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| CN203032381U (en) * | 2012-09-18 | 2013-07-03 | 中国第一汽车股份有限公司 | Range extended electric vehicle (REEV) power system provided with dual clutch transmission device |
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