CN103921666A - Electric vehicle power system - Google Patents
Electric vehicle power system Download PDFInfo
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- CN103921666A CN103921666A CN201410129075.XA CN201410129075A CN103921666A CN 103921666 A CN103921666 A CN 103921666A CN 201410129075 A CN201410129075 A CN 201410129075A CN 103921666 A CN103921666 A CN 103921666A
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- gear
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- driving engine
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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
- Y02T10/62—Hybrid vehicles
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Abstract
The invention relates to an electric vehicle power system. An engine of the system is connected with a first motor rotor through an inner shaft, and a second motor rotor is connected with an outer shaft which is connected with a first-level gear pair. The outer shaft is arranged on the periphery of the inner shaft, and each of the outer shaft and the inner shaft can rotate independently. A second motor outputs power to a differential through the outer shaft, the first-level gear pair and a main reduction gear pair. When a shift mechanism is jointed with the first-level gear pair, the engine outputs power to the differential through the first-level gear pair and the main reduction gear pair; when the shift mechanism is jointed with a second-level gear pair, the engine outputs power to the differential through the second-level gear pair and the main reduction gear pair. The differential is connected with wheels through axle shafts. When a power battery is low, a vehicle is driven in tandem at a low speed and is driven in parallel at a high speed, so that high-speed long-distance performance is improved; a first motor and the second motor are in integrated design, the structure is compact.
Description
Technical field
The invention belongs to electronlmobil field, relate to a kind of power system of electric automobile, particularly there are driving engine and two electrical motors and can carry out engine drive and electric motor driven externally rechargeable type power system of electric automobile.
Background technology
In the prior art, be known to following content.
Extended-range electric vehicle is that one is furnished with vehicle mounted dynamic battery and auxiliary power unit (AuxiliaryEnergySupply, AES) pure electrically operated electronlmobil, in the time that electric energy is sufficient, battery provides Vehicle Driving Cycle required all energy, in the time that electric energy is not enough, auxiliary power unit work.
Stroke-increasing electric automobile mode of operation is divided into two stages, and first stage is CD(ChargeDepleting, electric quantity consumption) stage, under this stage, keep pure motor driving, in limited travelled distance, provide energy by battery; Subordinate phase is CS(Charge Sustaining, and electric weight keeps) stage, under this stage, driving engine participation work, realizes the prolongation of car load continual mileage.
There are two kinds of configurations in current stroke-increasing electric automobile, comprises series connection stroke boosting electronlmobil (as AudiA1e-tron) and series-parallel connection stroke-increasing electric automobile (as ChevroletVOLT).In series connection stroke boosting battery-driven car, electrical motor is for driving propulsion source, and driving engine does not directly drive vehicle, and just, in the time that electrokinetic cell electric weight drops to a certain degree, driving engine just can start, and drives electrical generator generating, for drive motor provides energy.Series connection stroke boosting power system of electric automobile is comparatively simple, and cost is lower.In series-parallel connection stroke-increasing electric automobile VOLT, the CS stage, tandem drive when low speed driving, while running at high speed, electrical motor is combined driving Vehicle Driving Cycle with driving engine, and under the CS stage, dynamic property and oil consumption are all better than series connection stroke boosting electronlmobil.
The most of users of China purchase car first, higher to the long-distance performance requriements of high speed.Because current battery energy density is low, pure electric vehicle continual mileage is shorter, can not meet the requirement of high speed long-distance running.
As above-mentioned series connection stroke boosting electronlmobil, conventionally configure low power driving engine and electrical generator, under the CS stage, dynamic property can only meet and goes home to travel.If increase the power of driving engine and electrical generator to improve the long-distance dynamic property of high speed in CS stage, due to energy secondary conversion loss, less economical when high speed long-distance running.So, the long-distance poor performance of series connection stroke boosting electronlmobil high speed.
Series-parallel connection stroke-increasing electric automobile dynamic property and oil consumption under the CS stage are all better than series connection stroke boosting electronlmobil, can meet the requirement of high speed long-distance running, but power system complexity, cost are higher.
Summary of the invention
The technical matters that invention will solve is to provide a kind ofly has the long-distance performance of good high speed, and power system is simpler, lower-cost power system of electric automobile.
In order to solve the problems of the technologies described above, power system of electric automobile of the present invention comprise driving engine, the first electrical motor, the second electrical motor, inner shaft, outer shaft, one grade of gear mesh, second speed gear to, main reduction gear to, gearshift, diff; Described driving engine is connected with the first motor rotor by interior axle, and the second motor rotor is connected with outer shaft, and outer shaft is connected with one grade of gear mesh; The second electrical motor by outer shaft, one grade of gear mesh and main reduction gear to outputing power to diff, in the time that gearshift engages with one grade of gear mesh, driving engine by one grade of gear mesh and main reduction gear to outputing power to diff; When gearshift and second speed gear are when engaging, driving engine by second speed gear to main reduction gear to outputing power to diff; Diff is connected with wheel by semiaxis.
The first described electrical motor and the second motor configurations be in the same side of one grade of gear mesh, and be configured on same axis, can make the structure decrease of side, improves and carry property.
A bumper of described engine power mouth configuration, plays shock absorbing effect.
The present invention also can be according to car load actual arrangement demand, the left side by the second motor arrangement at one grade of gear mesh, and the first electrical motor is between second speed gear pair and driving engine, and the first electrical motor and the second motor configurations are on same axis.Between driving engine and the first electrical motor, configure a bumper, or the first electrical motor and second speed gear between configure a bumper, play shock absorbing effect.
Described gearshift has three operating states, is respectively the second operating state that the first operating state being connected with one of them gear of one grade of gear mesh, one of them gear right with second speed gear be connected, the 3rd operating state not being connected with any gear.
The present invention is by controlling the operating state of gearshift, realize the switching of power system of electric automobile mode of operation, pass through selectively one grade of gear mesh or second speed gear to outputting power, when gearshift is during in the first operating state, driving engine is by one grade of gear mesh, main reduction gear, diff and semiaxis outputting power are to wheel, when gearshift is during in the second operating state, driving engine is by second speed gear pair, main reduction gear, diff and semiaxis outputting power are to wheel, when gearshift is during in the 3rd operating state, driving engine directly outputting power to wheel.
The second described electrical motor peak power is determined by car load dynamic property; it is not only greater than the demand power of hundred kilometers of acceleration of car load; and be greater than the demand power of car load maximum speed; in the time that electrokinetic cell electric weight is sufficient (SOC is 35%～100%); the second electrical motor drives separately Vehicle Driving Cycle; engine shutdown, reduces oil consumption and discharge.
Good effect of the present invention is: the second electrical motor can drive vehicle always, and car load dynamic property demand is met by the second electrical motor, ensures pure electronic performance.By controlling the operating state of gearshift, in the time that electrokinetic cell electric weight is sufficient (SOC is 35%～100%), the second electrical motor drives separately Vehicle Driving Cycle, and engine shutdown reduces oil consumption and discharge.When electrokinetic cell electric weight is not enough (SOC is 25%～35%), when low speed driving, utilize the first electrical motor for power battery charging is to meet vehicle power demand, while running at high speed, driving engine participates in driving the demand of driving power and electronic accessory horsepower to meet vehicle, improve the rate of load condensate of driving engine, thereby improved the fuel economy of car load; The present invention in the time that electrokinetic cell electric weight is not enough, tandem drive vehicle when low speed, parallel drive vehicle when high speed, has improved the long-distance performance of high speed.By one grade of gear mesh or second speed gear, to outputting power, engine operation interval is more flexible, can take into account dynamic property and the economy of vehicle simultaneously.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Fig. 1 is power system of electric automobile embodiment 1 structural representation of the present invention.
Fig. 2 is power system of electric automobile embodiment 2 structural representations of the present invention.
Fig. 3 is power system of electric automobile embodiment 3 structural representations of the present invention.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, power system of electric automobile of the present invention comprise driving engine 1, the first electrical motor, the second electrical motor, interior axle 2, outer shaft 15, one grade of gear mesh, second speed gear to, main reduction gear to, gearshift 4, diff 16, bumper 20; Described driving engine 1 is connected with the first motor rotor 6 by interior axle 2, and the second motor rotor 8 is connected with outer shaft 15, and outer shaft 15 is connected with one grade of gear mesh; Outer shaft 15 is located at the periphery of described interior axle 2, and can independently rotate separately with interior axle 2; The second electrical motor is connected with diff 16 with main reduction gear pair by outer shaft 15, one grade of gear mesh, and in the time that gearshift 4 engages with one grade of gear mesh, driving engine 1 is connected with diff 16 with main reduction gear pair by one grade of gear mesh; When gearshift 4 and second speed gear are when engaging, driving engine 1 by second speed gear to being connected with diff 16 with main reduction gear pair; Diff 16 is connected with wheel 18 by semiaxis 17.Bumper 20 is arranged in engine power mouth, plays shock absorbing effect, cuts down driving engine and is delivered to the first electrical motor, one grade of gear mesh, the right vibrations of second speed gear.
One grade of described gear mesh is often meshed together and forms by low speed gear 5 and low speed gear 11, and outer shaft 15 is connected with low speed gear 5, and low speed gear 11 is connected with gear 13 by transmission shaft 10.
Described second speed gear is to often being meshed together and form by high speed gear 3 and high speed gear 12, and interior axle 2 is connected with high speed gear 3, and high speed gear 12 is connected with gear 13 by transmission shaft 10.
Described main reduction gear is to often being meshed together and form by gear 13, gear 14, and gear 14 is fixed on diff 16.
In the art, one grade is often referred to the relatively low gear of speed, and second gear is often referred to the gear that speed is relatively high.Therefore above-mentioned low speed gear and high speed gear also not refer to proper low speed and high speed, but relative low speed and high speed.
The first described electrical motor and the second motor arrangement are in the left side of described one grade of gear mesh.
The first electrical motor comprises the first motor rotor 6, the first motor stators 7; The second electrical motor comprises the second motor rotor 8, the second motor stators 9.
The second electrical motor is powered by the electrokinetic cell not being shown in figure, in the time that vehicle stop moves, can charge to electrokinetic cell by outside electric power network, in Vehicle Driving Cycle process, in the time that electrokinetic cell electric weight drops to a certain degree, it is power battery charging that driving engine 1 drives the first electrical motor.
The second described electrical motor peak power is determined by car load dynamic property, it is not only greater than the demand power of hundred kilometers of acceleration of car load, and be greater than the demand power of car load maximum speed, concrete watt level by complete vehicle curb weight, hundred kilometers of pick-up times, car load windages, roll the decisions such as resistance.Wherein the demand power of hundred kilometers of acceleration of car load and the demand power of car load maximum speed be those skilled in the art by routine techniques means just confirmable.
Gearshift 4 has three operating states, the 3rd operating state that be respectively the first operating state being connected with low speed gear 5, the second operating state being connected with high speed gear 3, is not connected with any gear.
When gearshift 4 is during in the first operating state, driving engine 1 is by low speed gear 5, low speed gear 11, gear 13, gear 14, diff 16, semiaxis 17 outputting powers are to wheel 18, when gearshift 4 is during in the second operating state, driving engine 1 is by high speed gear 3, high speed gear 12, gear 13, gear 14, diff 16, semiaxis 17 outputting powers are to wheel 18, when gearshift 4 is during in the 3rd operating state, driving engine 1 directly outputting power to wheel 18.
According to battery charge state (SOC), power system of electric automobile has two working stages: electric quantity consumption (CD) stage and electric weight maintain (CS) stage.When battery electric quantity abundance (SOC is 35%～100%), power system of electric automobile is operated in the CD stage, and in the time that battery electric quantity is reduced to a certain degree (SOC is 25%～35%), power system of electric automobile enters into the CS stage.Under the CD stage, power system of electric automobile is operated in electric-only mode.Under the CS stage, power system of electric automobile has following several mode of operation: low speed series model, high speed traveling power generation mode, the independent drive pattern of high speed engine and high-speed joint drive pattern.Under the CS stage, because driving engine can be participated in driving directly, reduce the quadratic loss of energy, so the long-distance better performances of its high speed.
Under CD stage and CS stage, power system of electric automobile mode of operation sees the following form.
By controlling the operating state of gearshift mechanism 4, realize the switching of described power system of electric automobile mode of operation.Under power system of electric automobile mode of operation and each mode of operation, the mode of operation of dynamic assembly is as described below.
Under low speed or high speed electric-only mode, driving engine 1 quits work, and gearshift 4 is in the 3rd operating state, and the second electrical motor drives separately Vehicle Driving Cycle.
Under low speed series model, driving engine 1 is worked, and gearshift 4 is in the 3rd operating state, and HCU controls the first electrical motor in generating mode of operation, and now the second electrical motor drives separately Vehicle Driving Cycle.
Under high speed traveling power generation mode, driving engine 1 is worked, and gearshift 4 is in the second operating state, and HCU controls the first electrical motor in generating mode of operation, and the second electrical motor quits work, and driving engine 1 drives separately Vehicle Driving Cycle.
Under the independent drive pattern of high speed engine, driving engine 1 is worked, and gearshift 4 is in the second operating state, and HCU controls the first electrical motor in the operation mode of changing a job, and the second electrical motor quits work, and driving engine 1 drives separately Vehicle Driving Cycle.
Under high-speed joint drive pattern, driving engine 1 is worked, and gearshift 4 is as required in the first operating state or the second operating state, and HCU controls the first electrical motor in the operation mode of changing a job, and the second electrical motor and driving engine 1 are combined driving Vehicle Driving Cycle.
Under different working modes, the mode of operation of the each parts of dynamic assembly sees the following form.
Embodiment 2
As shown in Figure 2, power system of electric automobile of the present invention possesses: driving engine 1, interior axle 2, high speed gear 3, gearshift 4, low speed gear 5, the first motor rotors 6, the first motor stator 7, the second motor rotor 8, the second motor stators 9, transmission shaft 10, low speed gear 11, high speed gear 12, gear 13, gear 14, outer shaft 15, diff 16, semiaxis 17, wheel 18, bumper 20.Difference from Example 1 is that the second electrical motor is positioned at the left side of one grade of gear mesh, and the first electrical motor is between second speed gear pair and driving engine, and the first electrical motor and the second motor configurations are on same axis; Bumper 20 be arranged in the first electrical motor and second speed gear between, play shock absorbing effect, cut down driving engine and the first electrical motor and be delivered to the right vibrations of second speed gear, all the other structures are identical with embodiment 1.The mode of operation of power system of electric automobile mode of operation and each assembly parts is identical with embodiment 1.
Embodiment 3
As shown in Figure 3, the difference of the present embodiment and embodiment 2 is, bumper 20 is arranged between driving engine and the first electrical motor, plays shock absorbing effect, cuts down driving engine and be delivered to the vibrations of the first electrical motor.All the other structures are identical with embodiment 2.The mode of operation of power system of electric automobile mode of operation and each assembly parts is identical with embodiment 1.
In addition, the invention is not restricted to the content that represents in above-mentioned embodiment, the suitable distortion that can carry out in the scope that does not depart from the claims in the present invention 1 or amendment all belong to the claimed category of the present invention example.
Claims (7)
1. a power system of electric automobile, it is characterized in that comprising driving engine (1), the first electrical motor, the second electrical motor, interior axle (2), outer shaft (15), one grade of gear mesh, second speed gear to, main reduction gear to, gearshift (4), diff (16); Described driving engine (1) is connected with the first motor rotor (6) by interior axle (2), and the second motor rotor (8) is connected with outer shaft (15); The second electrical motor by outer shaft (15), one grade of gear mesh and main reduction gear to outputing power to diff (16), in the time that gearshift (4) engages with one grade of gear mesh, driving engine (1) by one grade of gear mesh and main reduction gear to outputing power to diff (16); When gearshift (4) and second speed gear are when engaging, driving engine (1) by second speed gear to main reduction gear to outputing power to diff (16); Diff (16) is connected with wheel (18) by semiaxis (17).
2. power system of electric automobile according to claim 1, is characterized in that the first described electrical motor and the second motor configurations are in the same side of one grade of gear mesh, and is configured on same axis.
3. power system of electric automobile according to claim 1 and 2, is characterized in that, at driving engine (1) clutch end bumper of configuration (20).
4. power system of electric automobile according to claim 1, it is characterized in that the left side of the second described motor arrangement at one grade of gear mesh, the first electrical motor is positioned between second speed gear pair and driving engine (1), and the first electrical motor and the second motor configurations are on same axis.
5. power system of electric automobile according to claim 4, is characterized in that, configures a bumper (20) between driving engine (1) and the first electrical motor.
6. power system of electric automobile according to claim 4, is characterized in that, the first electrical motor and second speed gear between configure a bumper (20).
7. power system of electric automobile according to claim 1, is characterized in that the second described electrical motor peak power is not only greater than hundred kilometers of car loads and accelerates demand power but also be greater than maximum speed demand power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129075.XA CN103921666A (en) | 2014-04-01 | 2014-04-01 | Electric vehicle power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129075.XA CN103921666A (en) | 2014-04-01 | 2014-04-01 | Electric vehicle power system |
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| CN103921666A true CN103921666A (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410129075.XA Pending CN103921666A (en) | 2014-04-01 | 2014-04-01 | Electric vehicle power system |
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Cited By (5)
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| CN109311379A (en) * | 2016-06-13 | 2019-02-05 | 三菱自动车工业株式会社 | Variable speed drives Biodge device |
| CN109311378A (en) * | 2016-06-13 | 2019-02-05 | 三菱自动车工业株式会社 | Variable speed drives Biodge device |
| CN110962835A (en) * | 2019-12-24 | 2020-04-07 | 江西麦克斯韦科技有限公司 | Energy management control method for extended range electric automobile |
| WO2021052557A1 (en) * | 2019-09-16 | 2021-03-25 | Gkn Automotive Limited | Hybrid drive arrangement with shift transmission, drivetrain arrangement and method for controlling same |
| CN114364559B (en) * | 2019-09-16 | 2024-08-02 | Gkn汽车有限公司 | Hybrid drive assembly with a gear shift transmission, drive train assembly and method for controlling such a drive train assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109311379A (en) * | 2016-06-13 | 2019-02-05 | 三菱自动车工业株式会社 | Variable speed drives Biodge device |
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| WO2021052557A1 (en) * | 2019-09-16 | 2021-03-25 | Gkn Automotive Limited | Hybrid drive arrangement with shift transmission, drivetrain arrangement and method for controlling same |
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| JP7447240B2 (en) | 2019-09-16 | 2024-03-11 | ジーケーエヌ オートモーティブ リミテッド | Hybrid drive assembly with shift transmission, powertrain assembly and method of controlling powertrain assembly |
| CN114364559B (en) * | 2019-09-16 | 2024-08-02 | Gkn汽车有限公司 | Hybrid drive assembly with a gear shift transmission, drive train assembly and method for controlling such a drive train assembly |
| CN110962835A (en) * | 2019-12-24 | 2020-04-07 | 江西麦克斯韦科技有限公司 | Energy management control method for extended range electric automobile |
| CN110962835B (en) * | 2019-12-24 | 2021-08-06 | 合达信科技集团有限公司 | Energy management control method for extended range electric automobile |
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Application publication date: 20140716 |