CN102874095A - Range extended electric vehicle power system - Google Patents
Range extended electric vehicle power system Download PDFInfo
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- CN102874095A CN102874095A CN201210346092XA CN201210346092A CN102874095A CN 102874095 A CN102874095 A CN 102874095A CN 201210346092X A CN201210346092X A CN 201210346092XA CN 201210346092 A CN201210346092 A CN 201210346092A CN 102874095 A CN102874095 A CN 102874095A
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Abstract
The invention relates to a range extended electric vehicle power system, which mainly comprises an internal combustion engine, a first motor, a second motor, a double clutch transmission device and a set of change gear mechanism, wherein a crank shaft of the internal combustion engine 1 is connected with a shell 2 of the double clutch transmission device; a first clutch 3 of the double clutch transmission device is connected with a first transmission gear 11 through a transmission shaft 13; a second clutch 4 of the double clutch transmission device is connected with a rotor 7 of the first motor; and a rotor 10 of the second motor is connected with a second transmission gear 8. The series operation mode and the parallel operation mode of the range extended electric vehicle power system can be switched by controlling the combination or separation of the first clutch 3 and the second clutch 4 of the double clutch transmission device. The first transmission gear and the second transmission gear form the change gear mechanism, so that the output torque of the second motor can be increased.
Description
Technical field
The present invention relates to a kind of stroke-increasing electric automobile, particularly have combustion engine and two electrical motors and can carry out the range extended electric vehicle power system of combustion engine and electrical motor parallel drive.
Background technology
Become today of China Automobile Industry theme in energy-conservation and environmental protection, hybrid vehicle has become the object of various countries automobile vendor primary study.Hybrid vehicle (Hybrid Electrical Vehicle is called for short HEV) refers to equip simultaneously the automobile of 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; it is the electronlmobil take driving engine as main power source; by hybrid power functions such as engine idle shutdown, braking energy recovery, low speed pure motor driving, driving generating, driving power-assisted and the independent drivings of driving engine; so that driving engine can be regulated and control flexibly according to the actual operating mode of car load; remain on the interior work in zone of Combination property the best, thereby reduce oil consumption and discharging.
Compare with hybrid vehicle, pure electric automobile (Battery Electric vehicle is called for short BEV) relies on electric direct motor drive vehicle fully, and its energy source has been realized zero-emission from electrical network, and efficiency is high, and noise is little.But be subjected to current driving force battery technology horizontal constraints, its energy density can't satisfy automobile-used demand, and the car load continual mileage is limited, can not satisfy the requirement of user's routine use.
In order to prolong the continual mileage of pure electric automobile, people have increased a high efficiency internal combustion engine in power system of electric automobile, and when the electrokinetic cell lower voltage, it can drive electrical generator power is provided, and reaches the purpose of extending driving range with this.This class battery-driven car is called as stroke-increasing electric automobile (Range-extended Electric Vehicle is called for short REEV).According to the power system structure, the stroke-increasing electric automobile that exists at present can be divided into series connection stroke boosting electronlmobil and series-parallel connection stroke-increasing electric automobile.Series connection stroke boosting electronlmobil advantage aspect cost increase (comparing with traditional vehicle) is larger, and dynamic property is difficult to satisfy the vehicle performance requirement under electric quantity maintaining stage, and the fuel economy of running at high speed is also relatively poor.Series-parallel connection stroke-increasing electric automobile dynamic property and oil consumption under electric quantity maintaining stage all are better than the series connection stroke boosting electronlmobil, but power system is complicated, cost is higher;
(1) because the combustion engine of traditional vehicle (or hybrid vehicle) need to be operated in bottom gear with full
Foot acceleration demand, the low and load of its rate of load condensate and rotation speed change are fast, affect the car load economy;
(2) in existing hybrid power configuration, motor is mainly used to regulate the work area of combustion engine, thereby make combustion engine as far as possible in the interval work of Optimum Economic, the power that driving vehicle needs is still mainly provided by combustion engine, therefore the power of combustion engine is very large, affects car load economy and emission performance;
(3) in existing hybrid power configuration, the first electrical motor form generally has two kinds, BSG(Belt Starter Generator) and ISG (Integrated Starter Generator), they directly link to each other with combustion engine usually, can drive them during internal combustion engine rotates always, this not only can produce mechanical friction loss, also can produce the electromagnetism loss, affects the car load economy;
(4) although pure electric automobile can be realized zero consumption of fuel and zero-emission, because the volume of electrokinetic cell and the restriction of energy density, its continual mileage is very limited;
(5) series connection stroke boosting electronlmobil is increasing under the journey pattern, has energy secondary conversion loss, and fuel economy is low.
Summary of the invention
The object of the present invention is to provide a kind of range extended electric vehicle power system, it adopts the combustion engine of a miniwatt grade and the second electrical motor of a high-power grade.When internal combustion engine drive, prevent from driving the rotation of the first electrical motor, reduced friction and the electromagnetism loss of the first electrical motor.Provide a larger speed ratio by change gear mechanism for the second electrical motor, give full play to motor by the high-performance characteristics of realization of High Speed, car load dynamic property demand is satisfied by the second electrical motor, reduced the power of combustion engine, improve the rate of load condensate of combustion engine, improved the car load fuel consumption and emission.When the electrokinetic cell electric weight was not enough, tandem drive vehicle during low speed to power battery charging, was kept electric quantity balancing by internal combustion engine drive the first electrical motor; Parallel drive vehicle during high speed, energy transfer efficiency is high, on the basis that guarantees vehicle power, has further prolonged the continual mileage of vehicle.
Technical scheme of the present invention is achieved in that a kind of range extended electric vehicle power system, be comprised of combustion engine, the first electrical motor, the second electrical motor, dual clutch transmission and a cover change gear mechanism, wherein change gear mechanism is comprised of the first transmission gear and the second transmission gear; It is characterized in that: the bent axle of combustion engine is connected with the housing of dual clutch transmission, the first clutch of dual clutch transmission is connected with the first transmission gear by transmission shaft, second clutch is connected with the first motor rotor, the second motor rotor is connected with the second transmission gear, increase the torque of the second electrical motor by change gear mechanism, can satisfy the maximum climbable gradient of vehicle requirement.
Described combustion engine is used for satisfying driving power that vehicle high-speed at the uniform velocity travels and the demand of electronic accessory horsepower.
The power of described the first electrical motor is used for cranking internal combustion engine, and satisfies electrokinetic cell SOC balance and electronic annex power requirement.
Described the second motor power (output) is determined by the car load dynamic property, increases torque by change gear mechanism, and the second electrical motor can satisfy the max. climb slope requirement.
Described combustion engine is by the first transmission gear outputting power, and the second electrical motor is by the change gear mechanism outputting power.
Described first clutch combination is carried out transmission of power between combustion engine and the second electrical motor, and first clutch separates, and transmission of power disconnects between combustion engine and the second electrical motor; Described second clutch combination, carry out transmission of power between combustion engine and the first electrical motor, second clutch separates, and transmission of power disconnects between combustion engine and the first electrical motor, also can cancel second clutch, the first electrical motor becomes to be rigidly connected with the housing of dual clutch transmission.
Described power system comprises following mode of operation:
A) when cranking internal combustion engine, first clutch separates, and the second clutch combination is by the first motor starting combustion engine;
B) when vehicle start, separate first clutch, disconnect transmission of power between combustion engine and the second electrical motor, the independent forward drive of the second electrical motor;
C) when low vehicle speeds or the efficiency of internal combustion engine were low, first clutch separated, and the second electrical motor drives separately vehicle.According to the electrokinetic cell dump energy, can in conjunction with second clutch, by the generating of internal combustion engine drive the first electrical motor, realize that power system is with series model work;
D) when vehicle suddenly gives it the gun, the first clutch combination, second clutch separates, and combustion engine and the second electrical motor drive vehicle simultaneously, and power system is with paralleling model work;
E) at the uniform velocity travel and efficiency of internal combustion engine when higher at vehicle, the first clutch combination is by IC engine-powered vehicles.According to the electrokinetic cell dump energy: can in conjunction with second clutch, by the generating of internal combustion engine drive the first electrical motor, realize the electrokinetic cell energy equilibrium; Also separable second clutch, the first electrical motor quits work, and reduces friction and the electromagnetism loss of the first electrical motor;
F) when car retardation travels or brakes, first clutch separates with second clutch, disconnects transmission of power between combustion engine and the second electrical motor, and the second electrical motor is to power battery charging;
G) when vehicle backing travels, first clutch separates with second clutch, disconnects transmission of power between combustion engine and the second electrical motor, and the second electrical motor works independently, and contrarotation drives vehicle.
Described combustion engine, dual clutch transmission and the first electrical motor can be cancelled, and power system is worked under electric-only mode always and is a kind of pure electric vehicle power system.
Good effect of the present invention is to adopt change gear mechanism, reduces vehicle to the second motor torque demand, reduces the second electrical motor volume; The first electrical motor, the second electrical motor, change gear mechanism Integration Design make system architecture compacter, realize the lightweight of power system; Compare the same level hybrid vehicle, power of IC engine is little, the rate of load condensate of combustion engine when having improved Vehicle Driving Cycle; When the second clutch of dual clutch transmission separates, drive the rotation of the first electrical motor when preventing internal combustion engine drive, reduced loss due to friction and the electromagnetism loss of the first electrical motor, thereby improved the fuel economy of car load; During the cancellation second clutch, the power system structure 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 be in conjunction with first clutch, make driving engine participate in vehicular drive, this moment, the power system energy transfer efficiency was high, on the basis that guarantees the car load dynamic property, can further prolong the continual mileage of vehicle.Based on power system of the present invention, can cancel combustion engine, dual clutch transmission and the first electrical motor, power system is worked under electric-only mode always, the present invention develops into a kind of pure electric vehicle power system, and the dynamical system that can realize stroke-increasing electric automobile and pure electric automobile is platform altogether.
Description of drawings
Fig. 1 is depicted as the structural representation of range extended electric vehicle power system.
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 the electrokinetic cell electric weight is sufficient; SOC is low, illustrates that the electrokinetic cell electric weight is not enough.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing: as shown in Figure 1, this range extended electric vehicle power system possesses: combustion engine 1, dual clutch transmission housing 2, first clutch 3, second clutch 4, dual clutch transmission 5, the first motor stators 6, the first motor rotor 7, the second transmission gear 8, the second motor stators 9, the second motor rotors 10, the first transmission gear 11, power output gear 12.
The bent axle of combustion engine 1 is connected with the housing of dual clutch transmission 2.The first clutch 3 of dual clutch transmission is connected with the first transmission gear 11 by transmission shaft 13, and second clutch 4 is connected with the first motor rotor 7.The second motor rotor 10 is connected with the second transmission gear 8.
First clutch 3 combinations are carried out transmission of power between combustion engine 1 and the second motor rotor 10.First clutch 3 separates, and transmission of power disconnects between combustion engine 1 and the second motor rotor 10.
According to power battery charged state SOC, power system has two working stages: electric quantity consumption CD stage and electric weight are kept the CS stage.When the electrokinetic cell electric weight was sufficient, system works was in the CD stage, and when the electrokinetic cell electric weight was reduced to a certain degree, system entered into the CS stage.CD under the stage power system following several mode of operation is arranged: 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.CS under the stage power system following several mode of operation is arranged: 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.
Under the electric-only mode, combustion engine 1 quits work, and first clutch 3 separates, and the first electrical motor quits work, and the second electrical motor drives separately Vehicle Driving Cycle.
Under the series model, combustion engine 1 work, first clutch 3 separates, second clutch 4 combinations, the generating of the first electrical motor, the second electrical motor drives separately Vehicle Driving Cycle.
[under the driving power generation mode, combustion engine 1 work, first clutch 3 combinations, second clutch 4 combinations, the generating of the first electrical motor, the second electrical motor is with turning, and combustion engine 1 drives Vehicle Driving Cycle.
Under the independent drive pattern of combustion engine, combustion engine 1 work, first clutch 3 combinations, second clutch 4 separates, and the first electrical motor quits work, and the second electrical motor is with turning, and combustion engine 1 drives Vehicle Driving Cycle.
Under the associating drive pattern, combustion engine 1 work, first clutch 3 combinations, second clutch 4 separates, and the first electrical motor quits work, and the second electrical motor and combustion engine 1 are united the driving Vehicle Driving Cycle.As shown in the table:
In the concrete driving process of vehicle, the mode of operation of this power system is specific as follows:
A) when cranking internal combustion engine 1, first clutch 3 separates, and second clutch 4 combinations are by the first motor starting combustion engine 1;
B) when vehicle start, separate first clutch 3, disconnect transmission of power between combustion engine 1 and the second electrical motor, the independent forward drive of the second electrical motor;
C) when low vehicle speeds or combustion engine 1 efficient are low, first clutch 3 separates, and the second electrical motor drives separately vehicle.According to the electrokinetic cell dump energy, can drive the generating of the first electrical motor by combustion engine 1 in conjunction with second clutch 4, realize that power system is with series model work;
D) when vehicle suddenly gives it the gun, first clutch 3 combinations, second clutch 4 separates, and combustion engine 1 and the second electrical motor drive vehicle simultaneously, and power system is with paralleling model work;
E) at the uniform velocity travel and combustion engine 1 efficient when higher at vehicle, first clutch 3 combinations drive vehicle by combustion engine 1.According to the electrokinetic cell dump energy: can drive the generating of the first electrical motor by combustion engine 1 in conjunction with second clutch 4, realize the electrokinetic cell energy equilibrium; Also separable second clutch 4, the first electrical motors quit work, and reduce friction and the electromagnetism loss of the first electrical motor;
F) when car retardation travels or brakes, first clutch 3 separates with second clutch 4, disconnects transmission of power between combustion engine 1 and the second electrical motor.Wheel drives the second electrical motor to power battery charging by driving device;
G) when vehicle backing travels, first clutch 3 separates with second clutch 4, disconnects transmission of power between combustion engine 1 and the second electrical motor, and the second electrical motor works independently, and contrarotation drives vehicle.
Claims (8)
1. a range extended electric vehicle power system is comprised of combustion engine, the first electrical motor, the second electrical motor, dual clutch transmission and a cover change gear mechanism, and wherein change gear mechanism is comprised of the first transmission gear and the second transmission gear; It is characterized in that: the bent axle of combustion engine is connected with the housing of dual clutch transmission, the first clutch of dual clutch transmission is connected with the first transmission gear by transmission shaft, second clutch is connected with the first motor rotor, the second motor rotor is connected with the second transmission gear, increase the torque of the second electrical motor by change gear mechanism, can satisfy the maximum climbable gradient of vehicle requirement.
2. range extended electric vehicle power system according to claim 1 is characterized in that described combustion engine is used for satisfying driving power that vehicle high-speed at the uniform velocity travels and the demand of electronic accessory horsepower.
3. range extended electric vehicle power system according to claim 1, the power that it is characterized in that described the first electrical motor are used for cranking internal combustion engine, and satisfy electrokinetic cell SOC balance and electronic annex power requirement.
4. range extended electric vehicle power system according to claim 1 is characterized in that described the second motor power (output) is determined by the car load dynamic property, increases torque by change gear mechanism, and the second electrical motor can satisfy the max. climb slope requirement.
5. range extended electric vehicle power system according to claim 1 is characterized in that described combustion engine by the first transmission gear outputting power, and the second electrical motor is by the change gear mechanism outputting power.
6. range extended electric vehicle power system according to claim 1, it is characterized in that described first clutch combination, carry out transmission of power between combustion engine and the second electrical motor, first clutch separates, and transmission of power disconnects between combustion engine and the second electrical motor; Described second clutch combination, carry out transmission of power between combustion engine and the first electrical motor, second clutch separates, and transmission of power disconnects between combustion engine and the first electrical motor, also can cancel second clutch, the first electrical motor becomes to be rigidly connected with the housing of dual clutch transmission.
7. range extended electric vehicle power system according to claim 1 is characterized in that described power system comprises following mode of operation:
A) when cranking internal combustion engine, first clutch separates, and the second clutch combination is by the first motor starting combustion engine;
B) when vehicle start, separate first clutch, disconnect transmission of power between combustion engine and the second electrical motor, the independent forward drive of the second electrical motor;
C) when low vehicle speeds or the efficiency of internal combustion engine were low, first clutch separated, and the second electrical motor drives separately vehicle, according to the electrokinetic cell dump energy, can be in conjunction with second clutch, the generating of internal combustion engine drive the first electrical motor realizes that power system is with series model work;
D) when vehicle suddenly gives it the gun, the first clutch combination, second clutch separates, and combustion engine and the second electrical motor drive vehicle simultaneously, and power system is with paralleling model work;
E) at the uniform velocity travel and efficiency of internal combustion engine when higher at vehicle, the first clutch combination is by IC engine-powered vehicles; According to the electrokinetic cell dump energy: can in conjunction with second clutch, by the generating of internal combustion engine drive the first electrical motor, realize the electrokinetic cell energy equilibrium; Also separable second clutch, the first electrical motor quits work, and reduces friction and the electromagnetism loss of the first electrical motor;
F) when car retardation travels or brakes, first clutch separates with second clutch, disconnects transmission of power between combustion engine and the second electrical motor, and the second electrical motor is to power battery charging;
G) when vehicle backing travels, first clutch separates with second clutch, disconnects transmission of power between combustion engine and the second electrical motor, and the second electrical motor works independently, and contrarotation drives vehicle.
8. range extended electric vehicle power system according to claim 1, it is characterized in that described combustion engine, dual clutch transmission and the first electrical motor can cancel, power system is worked under electric-only mode always and is a kind of pure electric vehicle power system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210346092.XA CN102874095B (en) | 2012-09-18 | 2012-09-18 | A kind of range extended electric vehicle power system |
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| CN201210346092.XA CN102874095B (en) | 2012-09-18 | 2012-09-18 | A kind of range extended electric vehicle power system |
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| CN102874095A true CN102874095A (en) | 2013-01-16 |
| CN102874095B CN102874095B (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516482A (en) * | 2020-02-24 | 2020-08-11 | 绿传(北京)汽车科技股份有限公司 | Power coupling transmission device, hybrid vehicle and operation method of hybrid vehicle |
| CN112895875A (en) * | 2021-03-12 | 2021-06-04 | 南京巨基汽车电子有限公司 | Range-extending series-parallel hybrid power self-adaptive control system and method |
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| JPH06245319A (en) * | 1993-02-15 | 1994-09-02 | Toyota Motor Corp | Engine driven generator |
| CN101204920A (en) * | 2006-12-19 | 2008-06-25 | 比亚迪股份有限公司 | Mixed motor vehicle driving system |
| CN201291756Y (en) * | 2008-08-28 | 2009-08-19 | 比亚迪股份有限公司 | Hybrid power drive system |
| CN202283871U (en) * | 2011-09-30 | 2012-06-27 | 比亚迪股份有限公司 | Hybrid power system and vehicle having the same |
| CN203032365U (en) * | 2012-09-18 | 2013-07-03 | 中国第一汽车股份有限公司 | Range-extending type electric vehicle power system |
-
2012
- 2012-09-18 CN CN201210346092.XA patent/CN102874095B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06245319A (en) * | 1993-02-15 | 1994-09-02 | Toyota Motor Corp | Engine driven generator |
| CN101204920A (en) * | 2006-12-19 | 2008-06-25 | 比亚迪股份有限公司 | Mixed motor vehicle driving system |
| CN201291756Y (en) * | 2008-08-28 | 2009-08-19 | 比亚迪股份有限公司 | Hybrid power drive system |
| CN202283871U (en) * | 2011-09-30 | 2012-06-27 | 比亚迪股份有限公司 | Hybrid power system and vehicle having the same |
| CN203032365U (en) * | 2012-09-18 | 2013-07-03 | 中国第一汽车股份有限公司 | Range-extending type electric vehicle power system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516482A (en) * | 2020-02-24 | 2020-08-11 | 绿传(北京)汽车科技股份有限公司 | Power coupling transmission device, hybrid vehicle and operation method of hybrid vehicle |
| CN112895875A (en) * | 2021-03-12 | 2021-06-04 | 南京巨基汽车电子有限公司 | Range-extending series-parallel hybrid power self-adaptive control system and method |
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| CN102874095B (en) | 2016-04-20 |
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