CN101870264B - Range-extended electric automobile - Google Patents
Range-extended electric automobile Download PDFInfo
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- CN101870264B CN101870264B CN2010102086437A CN201010208643A CN101870264B CN 101870264 B CN101870264 B CN 101870264B CN 2010102086437 A CN2010102086437 A CN 2010102086437A CN 201010208643 A CN201010208643 A CN 201010208643A CN 101870264 B CN101870264 B CN 101870264B
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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 invention discloses a range-extended electric automobile using a micro gas turbine generator set. The electric automobile comprises a power electronic converter, a vehicle-mounted charger, an energy storage device, an energy management unit, an overall controller, an electromotor, a speed changer, a micro gas turbine controller, the micro gas turbine generator set and a fuel tank; and under the control of the overall controller, the fuel tank supplies fuel to the micro gas turbine generator set, and the micro gas turbine generator set generates electricity to increase the running mileage of the vehicle. The ranged-extended pure electric automobile reduces the dependence on a charging foundation facility, can adapt to running of high-speed and suburb road conditions better, improves the adaptability of the vehicle, meanwhile diversifies the energy of the vehicle, is favorable for energy safety, and solves the refrigerating and heating problems of the pure electric automobile.
Description
Technical field
The present invention relates to a kind of range-extended electric automobile, particularly a kind of employing miniature gas turbine is sent out unit increases travelled distance, improves the range-extended electric automobile of vehicle compatibility.
Background technology
Pure electric automobile adopts electrical motor as actuating device; By vehicle-mounted chargeable storage or other energy accumulating devices energy is provided; Have zero-emission, high efficiency, peace and quiet, operate steadily, advantage such as driver behavior is easy, use and maintenance cost is low and required energy source is extensive; Thereby in existing new-energy automobile technology, be regarded as long-run development target or final developing goal.
Closed-center system commonly used on pure electric automobile is battery pack and super capacitor group etc.; Though it is fast that the super capacitor group discharges and recharges speed; But its electric energy can not long term storage; Thereby limited it as the independently use of closed-center system on pure electric automobile, mostly employed closed-center system is battery pack (hereinafter to be referred as battery pack) on the pure electric automobile at present.
In recent years, the appearance of store energy technology rapid development, especially lithium ion battery, it is identical that the driving performance of pure electric automobile can be accomplished with conventional car, but because the energy capacity of battery pack is limited, limited the continual mileage of pure electric automobile.Increase continual mileage, will increase battery capacity, but the increase of battery capacity brings the increase of complete vehicle weight and the rapid increase of integral vehicle cost.Because continual mileage is limited, and the contradiction between continual mileage and integral vehicle cost, the weight, make pure electric automobile to use more among a small circle in the city.And because charging Infrastructure is also unsound, and battery pack super-quick charging power technology still do not obtain breaking through, and restricted promoting the use of and batch manufacturing of pure electric automobile to a great extent.
In addition, on traditional pure electric automobile, all energy all derive from closed-center system; Like list of references: Ai Saini etc. work., modern electro electrical automobile, mixed power electric car and fuel-cell vehicle---groundwork, theory and design. Beijing: China Machine Press, in 2008; Comprise vehicle refrigeration and heating institute energy requirement; And the refrigeration of vehicle and heating, especially the refrigeration power consumption is very big, has therefore produced the traveling comfort of vehicular drive and the contradiction between the continual mileage again.
Summary of the invention
To the problem that prior art exists, the present invention proposes a kind of range-extended electric automobile, through adopting the miniature gas turbine generator set electric energy is provided, and increases travelled distance, improves the comformability of vehicle.This range-extended electric automobile has improved the driving performance of car load, makes the energy diversification more of car load, and make car load more economically, environmental protection.This range-extended electric automobile mainly comprises: converters, onboard charger, closed-center system, energy management unit, entire car controller, electrical motor and change-speed box also comprise: micro-gas-turbine machine controller, miniature gas turbine generator set and Fuel Tank.
Described onboard charger is the closed-center system charging through being connected with external source; Electric energy stored needs to convert required alternating current into through converters and exports to electrical motor in the described closed-center system, and electrical motor drives range-extended electric automobile and goes under the control of entire car controller; Described energy management unit is used for monitoring in real time voltage, electric current, temperature and the information about power of closed-center system, and the information that monitors is sent in the entire car controller; Described entire car controller is controlled electrical motor and change-speed box according to the signal of accelerator pedal sensor and brake pedal sensor, and car load is carried out the control of braking energy removal process; When the electric weight in the closed-center system that entire car controller monitors in energy management unit is crossed when low; Micro-gas-turbine machine controller control miniature gas turbine generator set under the CAN of entire car controller order is started working, and sends the work state information of miniature gas turbine generator set to entire car controller; The miniature gas turbine generator set is converted into electric energy with the chemical power of fuel in the Fuel Tank; When adding the frequency-variable electronic controller between selected miniature gas turbine generator set and the electrical motor; The electric energy of miniature gas turbine generator set output directly exchanges through frequency-variable electronic controller conversion back and outputs to electrical motor; Simultaneously, the unnecessary electric energy of miniature gas turbine generator set output converts direct current (DC) into through converters and is stored in the closed-center system; When not adding the frequency-variable electronic controller between miniature gas turbine generator set and the electrical motor; The electric energy of miniature gas turbine generator set output needs to convert direct current (DC) into through converters and is stored in the closed-center system, and closed-center system converts required ac-powered engine operation into through converters more then; Described change-speed box is used to regulate motor torque-rotary speed property and the car load contradiction between the demand of going, and according to the characteristic of concrete electrical motor, change-speed box can be single grade or multi-speed gear box.
Described converters is connected with electrical motor with closed-center system, entire car controller, miniature gas turbine generator set respectively through wire harness; Closed-center system is connected with onboard charger with energy management unit respectively through wire harness; Onboard charger is connected with electrical network through wire harness; Entire car controller is connected with the micro-gas-turbine machine controller with energy management unit respectively through the CAN line; The miniature gas turbine generator set is connected with converters with the micro-gas-turbine machine controller through wire harness; The miniature gas turbine generator set is connected through pipeline with Fuel Tank; Change-speed box, wheel and diff all adopt common mechanical connection method to be connected.
Range-extended electric automobile provided by the present invention can be realized three kinds of operational modes, is respectively the cruising pattern, increases journey pattern and stopping for charging pattern.
Described cruising pattern is meant: the operational mode that range-extended electric automobile is adopted during cruising in the electric weight scope that closed-center system can provide; Under this operational mode, the electric energy of electrical motor all derives from closed-center system.Entire car controller is according to the signal of accelerator pedal sensor and brake pedal sensor; And export correct current signal and give converters; Through converters the alternating current that the electric energy in the closed-center system is converted into power demand is outputed to electrical motor; And the status information of the electrical motor that feeds back such as the rotating speed through electrical motor and temperature sensor, entire car controller is exported to the current signal of converters and revised in real time.When car retardation or descending, electrical motor is by wheel drive, converts the mechanical energy of vehicle to electric energy, and electric energy charges in the closed-center system after through the converters conversion, carries out braking energy and reclaims.
The described journey pattern that increases is meant: this range-extended electric automobile exceeds the cruising mileage that closed-center system drives, the operational mode that is adopted in the time of perhaps when electric energy stored in the closed-center system drops to setting value A, still need going; This operational mode activates according to the information about power of the closed-center system of energy management unit transmission through entire car controller automatically; Under this operational mode; Entire car controller sends CAN and orders to the micro-gas-turbine machine controller; Micro-gas-turbine machine controller control miniature gas turbine generator set is worked in the minimum load range of fuel oil consumption with constant rotational speed; The work of miniature gas turbine generator set also produces electric energy, and the electric energy process frequency-variable electronic controller conversion back of miniature gas turbine generator set output directly exchanges and outputs to its use of electrical motor confession; When the power of miniature gas turbine generator set output was superfluous, this part electric energy converted direct current (DC) to through converters and charges in the closed-center system.When car retardation or descending, electrical motor is by wheel drive, converts the mechanical energy of vehicle to electric energy, and electric energy charges in the closed-center system after through the converters conversion, carries out braking energy and reclaims.Increase under the journey pattern at this, entire car controller is according to the vehicle ' power demand, dynamically adjusts the workload of miniature gas turbine generator set through the micro-gas-turbine machine controller, to satisfy the needs of vehicle '.When the miniature gas turbine generator set drives the electric energy that the electric energy that charges into more than needed and braking are reclaimed, when making the electric weight of closed-center system reach setting value B, vehicle is got back to the cruising pattern.
Described stopping for charging pattern is meant: the operational mode when range-extended electric automobile remains static, this operational mode is manually activated by chaufeur, through the miniature gas turbine generator set closed-center system is charged.Under this operational mode, the miniature gas turbine generator set starts the back with the constant rotational speed running, in the minimum load area of oil consumption, moves.When the electric weight in the closed-center system reached setting value B, entire car controller was closed the miniature gas turbine generator set through the micro-gas-turbine machine controller, accomplished under the dead ship condition charging to closed-center system; When the electric weight in the closed-center system did not reach setting value B, chaufeur is this pattern of manual-lock at any time.
The invention has the advantages that:
1, range-extended electric automobile provided by the present invention; Adopting the miniature gas turbine generator set is the closed-center system charging; On the travelled distance of closed-center system driven, increased travelled distance, range-extended electric automobile can be adapted at a high speed better and the suburb road conditions are gone;
2, range-extended electric automobile provided by the invention through adopting the miniature gas turbine generator set, has reduced the dependence of common pure electric automobile to charging Infrastructure, has improved the comformability of vehicle, has also solved the refrigeration and the heating problem of pure electric automobile;
3, range-extended electric automobile provided by the invention; Adopt the miniature gas turbine generator set to have fuel tolerance preferably; Can use natural fuels, biogas, acidic gas, gasoline, diesel oil and kerosene etc.; Advantage with energy diversification, its exhaust pollution simultaneously is very low, helps environmental protection;
4, the miniature gas turbine generator set of range-extended electric automobile employing provided by the invention, its load variations is little to the influence of fuel economy, helps the operating mode with constant rotational speed operation expansion pure electric automobile travelled distance;
5, the stopping for charging pattern that has of range-extended electric automobile provided by the invention realizes that zero-emission goes after can making range-extended electric automobile get into the urban district from the suburb;
6, the range-extended electric automobile that proposes of the present invention is accomplished the charging to closed-center system through onboard charger, and through closed-center system or miniature gas turbine generator set to external consumer emergency service.
Description of drawings
Fig. 1: range-extended electric automobile structure principle chart of the present invention;
Fig. 2: range-extended electric automobile of the present invention comprises the structure principle chart of frequency-variable electronic controller.
Among the figure: the 1-converters; The 2-onboard charger; The 3-closed-center system;
The 4-energy management unit; The 5-entire car controller; 6-micro-gas-turbine machine controller;
7-miniature gas turbine generator set; The 8-Fuel Tank; The 9-electrical motor;
The 10-change-speed box; The 11-wheel; The 12-diff;
13-frequency-variable electronic controller.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
The present invention proposes a kind of range-extended electric automobile, and this range-extended electric automobile adopts the miniature gas turbine generator set that electric energy is provided, and increases the travelled distance of vehicle, reduces the dependence of pure electric automobile to charging Infrastructure.This range-extended electric automobile structure is as shown in Figure 1; Comprise converters 1, onboard charger 2, closed-center system 3, energy management unit 4, entire car controller 5, electrical motor 9, change-speed box 10, wheel 11 and diff 12, this range-extended electric automobile also comprises: micro-gas-turbine machine controller 6, miniature gas turbine generator set 7 and Fuel Tank 8.
Described onboard charger 2 is closed-center system 3 chargings through being connected with external source; Electric energy stored needs to convert required alternating current into through converters 1 and exports to electrical motor 9 in the described closed-center system 3, and electrical motor 9 drives range-extended electric automobile work under the control of entire car controller 5; Described energy management unit 4 is used for monitoring in real time voltage, electric current, temperature and the information about power of closed-center system 3, and the information that monitors is sent in the entire car controller 5; Described entire car controller 5 is according to the signal of accelerator pedal sensor and brake pedal sensor; Phase current with electrical motor 9 is that feedback quantity is controlled the torque and the power of electrical motor 9; And when car retardation or descending; The green phase electric current applies negative torque for electrical motor 9 to make it under the driving of wheel 11, converts the mechanical energy of range-extended electric automobile to electric energy, carries out braking energy and reclaims; When the electric weight in the closed-center system 3 that entire car controller 5 monitors in energy management unit 4 is crossed when low; Micro-gas-turbine machine controller 6 control miniature gas turbine generator set 7 under the CAN of entire car controller 5 order is started working, and sends the work state information of gas-turbine powerplant 7 to entire car controller 5; Miniature gas turbine generator set 7 is converted into electric energy with the chemical power of fuel in the Fuel Tank 8; When adding frequency-variable electronic controller 13 between selected miniature gas turbine generator set 7 and the electrical motor 9; As shown in Figure 2; The electric energy of miniature gas turbine generator set 7 outputs directly exchanges through frequency-variable electronic controller 13 conversion backs and outputs to electrical motor 9; Simultaneously, the unnecessary electric energy of miniature gas turbine generator set 7 output converts direct current (DC) into through converters 1 and is stored in the closed-center system 3; When not adding frequency-variable electronic controller 13 between miniature gas turbine generator set 7 and the electrical motor 9; The electric energy of miniature gas turbine generator set 7 outputs needs to convert direct current (DC) into through converters 1 and charges in the closed-center system 3, and closed-center system 3 converts 9 work of required ac-powered motivation into through converters 1 more then; Described change-speed box 10 is used to regulate electrical motor 9 torque-speed characteristics and the car load contradiction between the demand of going, and according to the characteristic of concrete electrical motor 9, change-speed box 10 can be single grade or multi-speed gear box; The realization function and the orthodox car of described wheel 11 and diff 12 are identical;
Described converters 1 is connected with closed-center system 3, entire car controller 5, gas-turbine powerplant 7 and electrical motor 9 respectively through wire harness; Closed-center system 3 is connected with onboard charger 2 with energy management unit 4 respectively through wire harness; Onboard charger 2 is connected with electrical network through wire harness; Entire car controller 5 is connected with micro-gas-turbine machine controller 6 with energy management unit 4 respectively through the CAN line; Gas-turbine powerplant 7 is connected with converters 1 with micro-gas-turbine machine controller 6 through wire harness; Gas-turbine powerplant 7 and Fuel Tank 8 are connected through pipeline; Change-speed box 10, wheel 11 and diff 12 all adopt common mechanical connection method to be connected.
Preferably, electrical motor 9 is a permasyn morot.
Preferably, change-speed box 10 is single gear gearbox.
Range-extended electric automobile provided by the present invention can be realized three kinds of operational modes, is respectively the cruising pattern, increases journey pattern and stopping for charging pattern.
Described cruising pattern is meant: the operational mode that range-extended electric automobile is adopted during cruising in the electric weight scope that 3 of closed-center systems can provide; Under this operational mode, the electric energy of electrical motor 9 all derives from closed-center system 3.Entire car controller 5 is according to the signal of accelerator pedal sensor and brake pedal sensor; And export correct current controling signal and give converters 1; Through converters 1 alternating current that the electric weight in the closed-center system 3 is converted into power demand is outputed to electrical motor 9; And the status information of the electrical motor 9 that feeds back such as the rotating speed through electrical motor 9 and temperature sensor, entire car controller 5 is exported to the current signal of converters 1 and revised in real time.When car retardation or descending, electrical motor 9 is driven by wheel 11, converts the mechanical energy of range-extended electric automobile to electric energy, and electric energy charges in the closed-center system 3 after through converters 1 conversion, carries out braking energy and reclaims.
The described journey pattern that increases is meant: this range-extended electric automobile exceeds the cruising mileage that closed-center system 3 drives, the operational mode that is adopted in the time of perhaps when electric energy stored drops to setting value A in the closed-center system 3, still need going; This operational mode activates according to the information about power of the closed-center system 3 of energy management unit 4 transmissions through entire car controller 5 automatically; Under this operational mode; Entire car controller 5 sends CAN and orders to micro-gas-turbine machine controller 6; Micro-gas-turbine machine controller 6 control miniature gas turbine generator seies 7 are worked in the minimum load range of fuel oil consumption with constant rotational speed; 7 work of miniature gas turbine generator set also produce electric energy, are stored in the use of power supply motivation in the closed-center system 3 after electric energy is changed through converters 1; Perhaps the electric energy of miniature gas turbine generator set 7 outputs directly outputs to electrical motor 9 through interchange after 13 conversions of frequency-variable electronic controller and supplies its use; When the power of miniature gas turbine generator set 7 outputs was superfluous, this part electric energy converted direct current (DC) into through converters 1 and is stored in the closed-center system 3.When car retardation or descending, electrical motor 9 is driven by wheel 11, converts the mechanical energy of range-extended electric automobile to electric energy, and electric energy charges in the closed-center system 3 after through converters 1 conversion, carries out braking energy and reclaims.Increase under the journey pattern at this, entire car controller 5 is according to the vehicle ' power demand, through the workload of micro-gas-turbine machine controller 6 dynamic adjustment miniature gas turbine generator seies 7, to satisfy the needs of vehicle '.Drive the electric energy that the electric energy that charges into and braking are reclaimed when miniature gas turbine generator set 7, when making the electric weight of closed-center system 3 reach setting value B, vehicle is got back to the cruising pattern.
Described setting value A and setting value B are mainly used in protection closed-center system 3, and prolong the service life of closed-center system 3.Wherein setting value A is meant that electric energy in the closed-center system 3 outputs to the electric weight minimum of electrical motor 9 closed-center system 3 when supplying its powered vehicle to go.Dissimilar closed-center system 3 its setting value A are different, are 20% of battery pack state-of-charge SOC like its setting value of ferric phosphate lithium cell group A; Described setting value B is meant that the electric energy in the closed-center system 3 outputs to the electric weight peak of electrical motor 9 closed-center system 3 when supplying its powered vehicle to go; Dissimilar closed-center system 3 its setting value B are different, are 80% of battery pack state-of-charge SOC like its setting value of ferric phosphate lithium cell group B.
Described stopping for charging pattern is meant: the operational mode when range-extended electric automobile remains static; This operational mode is manually activated by chaufeur; Vehicle remains static under this pattern, charges through 7 pairs of closed-center systems 3 of miniature gas turbine generator set.Under this operational mode, miniature gas turbine generator set 7 starts the back with the constant rotational speed running, in the minimum load area of oil consumption, moves.When the electric weight in the closed-center system reached setting value B, entire car controller 5 was closed miniature gas turbine generator set 7 through micro-gas-turbine machine controller 6, accomplished under the dead ship condition charging to closed-center system 3; When the electric weight in the closed-center system 3 did not reach setting value B, chaufeur is this pattern of manual-lock at any time.
Range-extended electric automobile provided by the invention can insert household socket or public electrically-charging equipment with the plug of onboard charger 2, accomplishes closed-center system 3 chargings.When onboard charger 2 with after electrical network is connected; Send link information and give entire car controller 5; Entire car controller 5 control onboard chargers 2 are opened closed-center system 3 chargings; In this process, monitor in real time by voltage, electric current, temperature and the information about power of 4 pairs of closed-center systems 3 of energy management unit, and to information such as entire car controller 5 feedback voltages, electric current, temperature and electric weight; After entire car controller 5 had been full of information from energy management unit 4 acquisition closed-center systems 3, control onboard charger 2 was closed.
Range-extended electric automobile provided by the invention closed-center system 3 capable of using or miniature gas turbine generator set 7 are external consumer emergency service; When external consumer is direct-flow electricity utilization apparatus, by closed-center system 3 power supplies or by miniature gas turbine generator set 7 power supply after converters 1 conversion; When external consumer is AC electric equipment, by 7 power supplies of miniature gas turbine generator set.
Claims (4)
1. range-extended electric automobile; Comprise converters, onboard charger, closed-center system, energy management unit, entire car controller, electrical motor and change-speed box, it is characterized in that: also comprise micro-gas-turbine machine controller, miniature gas turbine generator set and Fuel Tank;
Described Fuel Tank provides fuel for the miniature gas turbine generator set; The micro-gas-turbine machine controller is ordered the work of controlling the miniature gas turbine generator set according to the CAN of entire car controller, and sends the work state information of miniature gas turbine generator set to entire car controller; Electric energy converts alternating current into through converters and exports to electrical motor in the closed-center system, realizes the driving to range-extended electric automobile;
Described onboard charger is the closed-center system charging through being connected with external source; Described energy management unit is used for monitoring in real time voltage, electric current, temperature and the information about power of closed-center system, and all information that will monitor send in the entire car controller; Described entire car controller is controlled electrical motor and change-speed box according to the signal of accelerator pedal sensor and brake pedal sensor;
Between described miniature gas turbine generator set and electrical motor, be provided with the frequency-variable electronic controller, the electric energy that the miniature gas turbine generator set produces is exported to electrical motor after changing through the frequency-variable electronic controller, realizes the driving to range-extended electric automobile; Simultaneously, the unnecessary electric energy that produces of miniature gas turbine generator set converts direct current (DC) into through converters and is stored in the closed-center system;
Described range-extended electric automobile has three kinds of operational modes of realization, is respectively the cruising pattern, increases journey pattern and stopping for charging pattern;
Described cruising pattern is meant: the operational mode that range-extended electric automobile is adopted during cruising in the electric weight scope that closed-center system can provide; Under this operational mode, the electric energy of electrical motor all derives from closed-center system, is used for short distance and goes;
The described journey pattern that increases is meant: this range-extended electric automobile exceeds the cruising mileage that closed-center system drives, perhaps when electric energy stored in the closed-center system drops to setting value A, and the operational mode that is adopted in the time of still need going; This operational mode activates according to the information about power of the closed-center system of energy management unit transmission through entire car controller automatically; Under this operational mode, the work of miniature gas turbine generator set also produces electric energy, and described electric energy is used for the direct motor drive vehicle '; When the electric weight in the closed-center system reached setting value B, vehicle was got back to the cruising pattern; Described setting value A and setting value B are respectively electric energy in the closed-center system and output to electrical motor when supplying its powered vehicle to go, and the minimum of contained electric weight and peak in the closed-center system are used for not limitting mileage to go;
Described stopping for charging pattern is meant: the operational mode when range-extended electric automobile remains static, this operational mode is manually activated by chaufeur, under this pattern, through the miniature gas turbine generator set closed-center system is charged.
2. range-extended electric automobile according to claim 1 is characterized in that: described converters is connected with electrical motor with closed-center system, entire car controller, miniature gas turbine generator set respectively through wire harness; Be connected with onboard charger with energy management unit respectively through wire harness; Entire car controller is connected with converters with energy management unit, micro-gas-turbine machine controller respectively through the CAN line; The miniature gas turbine generator set is connected with micro-gas-turbine machine controller, frequency-variable electronic controller through wire harness; The miniature gas turbine generator set is connected through pipeline with Fuel Tank.
3. range-extended electric automobile according to claim 1; It is characterized in that: when onboard charger and external source are connected to the closed-center system charging; Send link information and give entire car controller; The vehicle control unit controls onboard charger is opened the closed-center system charging, by energy management unit the process of charging of closed-center system monitored in real time, and to entire car controller feedback current, voltage, temperature and information about power; After the information that entire car controller has been full of from energy management unit acquisition closed-center system, the vehicle control unit controls onboard charger is closed.
4. the application of any described range-extended electric automobile of claim of claim 1～3; It is characterized in that: described range-extended electric automobile is external consumer emergency service; When external consumer is direct-flow electricity utilization apparatus, by store electrical energy power supply in the closed-center system or by the power supply after the converters conversion of miniature gas turbine generator set; When external consumer is AC electric equipment, by the miniature gas turbine electric set electric supply.
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| CN1533931A (en) * | 2003-03-27 | 2004-10-06 | 威达能源科技股份有限公司 | Energy source management system of electrically driven vehicle |
| CN2619822Y (en) * | 2003-04-30 | 2004-06-09 | 杭州火烈鸟绿色动力研究所 | Series mixed power electric vehicle |
| CN2797113Y (en) * | 2005-03-31 | 2006-07-19 | 深圳市钜华环保汽车有限公司 | Mixed series type new mixed power bus |
| CN101274594A (en) * | 2007-03-30 | 2008-10-01 | 南车成都机车车辆有限公司 | Hybrid power system for track |
| CN201304906Y (en) * | 2008-11-24 | 2009-09-09 | 王子云 | Hybrid power device of electric automobile |
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