CN100421979C - Power coupler for mixed power automobile - Google Patents

Power coupler for mixed power automobile Download PDF

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Publication number
CN100421979C
CN100421979C CNB2007100553067A CN200710055306A CN100421979C CN 100421979 C CN100421979 C CN 100421979C CN B2007100553067 A CNB2007100553067 A CN B2007100553067A CN 200710055306 A CN200710055306 A CN 200710055306A CN 100421979 C CN100421979 C CN 100421979C
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controller
engine
motor
torque
gear
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CN101020410A (en
Inventor
曾小华
王庆年
王伟华
于远彬
宋大凤
靳立强
朱庆林
于永涛
王鹏宇
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Jilin University
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Jilin University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles

Abstract

The power coupler for mixed power automobile adopts a traditional differential, and has the left half axle gear and the right half axle gear connected separately to the generator and the motor, main reducing gear with driving gear fixed onto the output shaft of the engine and driven gear meshed with the driving gear to drive the planet gear via one cross, and the motor connected to the driving axle to drive the wheel for running. On the engine and the chassis, there are one engine controller to control the on-off, rotation speed and torque of the power source, one generator controller, one motor controller, and one overall controller to control the foregoing controllers. The present invention has simplified trial manufacture process, simple structure and capacity of automatic stepless speed changing.

Description

The dynamic coupling device of Hybrid Vehicle
Technical field
The present invention relates in the mixed power automobile driving system to realize a kind of device, more particularly relate to a kind of dynamic coupling device of Hybrid Vehicle power distribution between the propulsion source and control.
Background technology
Energy-conservation and environmental protection is the two principal themes of 21 century development of automobile, electronlmobil is the ideal substitute of traditional oil-burning internal combustion engine automobile, but be subjected to the restriction and the expensive constraint of fuel cell of storage battery energy, hybrid vehicle can be considered a kind of feasible program that comprehensively addresses the above problem.Hybrid vehicle is to provide power by two or more propulsion source, and current commonplace scheme is to adopt driving engine and electrical motor, electrical generator to make up.How realizing the power distribution between hybrid electric vehicle engine and electrical motor, the electrical generator, is one of development hybrid vehicle key issue that must solve.
Hybrid vehicle has multiple propulsion source, and as energy-storage travelling wave tube and driving engine, therefore, its type of drive is also more various.Combination difference according to propulsion source can be divided into Series Hybrid-Power Vehicle (SHV), parallel hybrid electric (PHV) and connection in series-parallel hybrid vehicle (SPHV).
The driving engine and the drive wheel of parallel hybrid electric (PHV) have mechanical connection, but add electrical generator and electrical motor between driving engine and drive wheel.Electrical generator and electrical motor not only can generate electricity but also can be electronic.In PHV, driving engine output drives most of power of automobile, and when desired torque variation was very fast, electrical generator and electrical motor for example, quickened and deceleration as the auxiliary power source of driving engine.Because the mechanical energy of driving engine can directly output to automobile drive axle, the centre does not have the conversion of energy, and system effectiveness is higher, and fuel oil consumption is also less.Series Hybrid-Power Vehicle (SHV) then have second propulsion source (can be engine-driven generator, conversion of solar energy be the solar cell of electric energy, chemical power that oxide is formed system directly changes into the fuel cell of electric energy).Its driving motor is the same with pure electric automobile (PEV), owing to do not have direct mechanical connection between the driving engine of SHV and the drive wheel, relatively is easy to this propulsion source is carried out optimal control, and the result makes driving engine can be stable at efficient district or near the work of Low Emission Zone.Therefore, the discharging of SHV is better than conventional truck and PHV, and with respect to PEV, its frequency from external charging also further reduces.
Series-parallel hybrid vehicle (SPHV) can be further divided into: switch to parallel or in-line switching regulator SPHV and continuous type SPHV according to demand for control, this dual mode has all engaged the advantage of series connection with parallel scheme, therefore, has optimum properties.
What be used for the series-parallel present more employing of dynamic coupling device is complicated sun and planet gear, and also needing of perhaps having installed devices such as change-speed box, power-transfer clutch additional, makes the whole drive unit structure not compact.These mechanisms generally all need bigger repacking or redesign, and the manufacturability of producing is had relatively high expectations, and the trial-production process-cycle is longer; Also relatively complicated to the control of sun and planet gear in addition, be not easy to Project Realization.
Summary of the invention
Technical matters to be solved by this invention is to overcome problems of the prior art, and a kind of traditional automobile dynamic coupling device of diff as hybrid vehicle that utilize is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to be achieved.Described dynamic coupling device is to adopt traditional diff, the left half axle gear of this diff and right axle shaft gear are respectively by a left side, right axle shaft connects electrical generator and electrical motor, the driving gear of main reduction gear is fixedly connected on the output shaft of driving engine, the driving gear of main reduction gear is meshed in both rotation axis coplanes and mutually perpendicular state with the driven gear of main reduction gear, the driven gear of main reduction gear and left half axle gear are same rotation axiss, the driven gear of main reduction gear rotates around the axis of left half axle gear and right axle shaft gear by the planetary wheel that the center cross drive is meshed with left half axle gear and right axle shaft gear, the output shaft of electrical motor connects drive axle by transmission shaft, and drive wheels is travelled.Driving engine, electrical generator and electrical motor are installed in respectively on the chassis of automobile.
On the input shaft in the left side of the electrical motor described in the technical scheme, electric control clutch and electric clipper control brake are installed successively from right to left; The engine controller of switch, load torque and the rotating speed of control driving engine is installed on driving engine, the engine controller and the motor controller of switch, rotating speed and the load torque of control electrical generator and electrical motor is installed on the chassis of automobile; Driving engine is connected with signal wire (SW) with engine controller, and electrical generator, engine controller, the storage battery, motor controller and the electrical motor that are installed on the car chassis are connected with cable successively; United and coordinating and the entire car controller of controlling engine controller, engine controller and motor controller are installed onboard, and entire car controller is connected with signal wire (SW) with engine controller, engine controller and motor controller respectively.The starter that the control driving engine is opened is installed on the chassis of automobile.Self-editing united and coordinating and the computer program device of controlling engine controller, engine controller and motor controller are housed on entire car controller, under the control of entire car controller, make driving engine, electrical generator and electrical motor realize following workflow as traditional diff of power coupling apparatus of hybrid power vehicle:
1. entire car controller is looked into and is got a time step circulating vehicle speed;
2. entire car controller is looked into and is got the current time step circulation speed of a motor vehicle;
3. entire car controller receives when each assembly status signal of front drive system;
4. entire car controller calculates road set torque (or power) demand and speed demand according to the current circulation speed of a motor vehicle and current acceleration;
5. according to the rotating speed of road idling speed demand calculating motor;
6. carry power demand and accumulator electric-quantity state according to the road, calculation engine best operating point rotating speed, torque, entire car controller instructs to the engine controller output state;
7. according to diff rotating speed, torque relational expression:
e=ω gm
T g = T e 2 (formula I)
T I - T m = T e 2
In the formula: ω c, ω g, ω m---be respectively engine speed, generator speed and motor speed;
T e, T g, T m, T I--be respectively engine output torque, generator for electricity generation torque, electric electromechanics dynamic torque and load torque;
Because being calculated by the 6th step, driving engine (9) best operating point rotating speed, torque determine, but the rotating speed of calculating generator and torque, and entire car controller instructs to the engine controller output state;
8. require and the torque of above-mentioned formula I calculating motor according to the road set torque, and the motor speed determined of engagement step 5, entire car controller instructs to the motor controller output state;
9. judge whether circulation finishes, if circulation does not finish, then repeats above-mentioned steps.
The invention has the beneficial effects as follows:
1. utilize the dynamic coupling device of traditional diff, realize hybrid vehicle continuous type connection in series-parallel drive form as Hybrid Vehicle.The present invention is according to the rotating speed differential of orthodox car with the symmetrical expression diff, the principle of torque mean allocation, make its input shaft connect driving engine, two output shafts connect electrical motor and electrical generator respectively, make half torque of engine power output export to generator for electricity generation, second half torque actuated wheel, the continuous type connection in series-parallel drive form of realization hybrid vehicle.Therefore, this diff can be used as the dynamic coupling device of hybrid vehicle, thereby has simplified the brand-new design and the trial-production of power coupling apparatus of hybrid power vehicle greatly, saves time, and saves expense.
2. utilize the dynamic coupling device of this Hybrid Vehicle can realize electrically variable transmission (ECVT) function, and can eliminate change-speed box, make total system obtain simplifying.This device utilizes diff rotating speed, transmission of torque and the relations of distribution, rotating speed, torque by regulator generator can make engine operation at best efficiency point, thoroughly solve conventional engines because the problem of the operation point inefficiency that causes with the mechanical connection of wheel, thereby realized the ECVT function.And the electrical motor that can utilize the high torque (HT) characteristic is realized the increase torque function of traditional change-speed box, can eliminate mechanisms such as change-speed box like this.
3. the dynamic coupling device that utilizes this Hybrid Vehicle can be realized the function of real-time regulated battery SOC (state of charge) in the driving process by rationally controlling generated output power.
4. consult Fig. 6, the deriving device of the another kind of technical scheme of the dynamic coupling device of shown in Figure 6 is Hybrid Vehicle promptly is equipped with electric control clutch and electric clipper control brake on the input shaft in electrical motor left side from right to left successively in the dynamic coupling device of Hybrid Vehicle shown in Figure 1.When driving engine quits work, cut-off clutch can drive car load by electrical motor, can realize the function of pure motor driving, and pure motor driving can be saved fuel oil consumption more, can further improve the efficient of car load.The dynamic coupling device of this Hybrid Vehicle can realize that also tandem drives, it is lower promptly to work as battery SOC, electric control clutch separates, electric clipper control brake engages, driving engine only charges to electrical generator, make battery SOC can be maintained to zone of reasonableness fast, can reduce the battery deep discharge like this, improve the service life of battery.
Description of drawings
Fig. 1 adopts the structural representation of traditional diff as the dynamic coupling device of Hybrid Vehicle;
Fig. 2 adopts the workflow diagram of traditional diff as the dynamic coupling device of Hybrid Vehicle;
Fig. 3 has provided to adopt dynamic coupling device each rotating speed the cycle variation law curve in a typical driving mode of traditional diff as Hybrid Vehicle;
Fig. 4 has provided to adopt the torque variation rule curve of traditional diff as each propulsion source that is connected of dynamic coupling device (electrical generator, electrical motor, driving engine) output of Hybrid Vehicle;
Fig. 5 has provided to adopt traditional diff to concern correlation curve as each rotating speed of dynamic coupling device of Hybrid Vehicle in a typical driving mode;
Fig. 6 has provided to adopt the structural representation of traditional diff as the deriving device of the another kind of technical scheme of the pure motor driving the realized function of the dynamic coupling device of Hybrid Vehicle;
Fig. 7 has provided employing tradition diff shown in Figure 6 is used for the hybrid power driving as the deriving device of the dynamic coupling device of Hybrid Vehicle workflow diagram
Fig. 8 has provided to adopt deriving device each rotating speed the cycle variation law curve in another typical driving mode of traditional diff as the dynamic coupling device of Hybrid Vehicle;
Fig. 9 has provided to adopt the torque variation rule curve of traditional diff as each propulsion source that is connected of deriving device (electrical generator, electrical motor, driving engine) output of the dynamic coupling device of Hybrid Vehicle;
Among the figure: 1. left half axle gear, 2. right axle shaft gear, the 3. driven gear of main reduction gear, 4. planetary wheel, 5. center cross, the 6. driving gear of main reduction gear, 7. electrical generator, 8. electrical motor, 9. driving engine, 10. storage battery, 11. drive axle, 12. wheels, 13. motor controllers, 14. engine controller, 15. starter, 16. entire car controllers (ECU), 17. engine controllers, 18. motor speed (curve), 19. engine speed (curve), 20. generator speeds (curve), 21. electrical motor operation torques (curve), 22. engine operation torque (curve), 23. electrical generator operation torque (curve), 24. generator speeds and motor speed sum (curve), the twice of 25. engine speeds (curve), 26. electric clipper control brake, 27. electric control clutchs.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing:
Consult Fig. 1, the dynamic coupling device of described Hybrid Vehicle is to adopt traditional diff, realizes power distribution and work between the propulsion source (electrical generator 7, electrical motor 8, driving engine 9) in mixed power automobile driving system.The left half axle gear 1 of this diff passes through a left side respectively with right axle shaft gear 2, right axle shaft connects electrical generator 7 and electrical motor 8, the driving gear 6 of main reduction gear is fixedly connected on the output shaft of driving engine 9, the driving gear 6 of main reduction gear is meshed in both rotation axis coplanes and mutually perpendicular state with the driven gear 3 of main reduction gear, the driven gear 3 and the left half axle gear 1 of main reduction gear are same rotation axiss, the rotation axis conllinear of the rotation axis of left half axle gear 1 and right axle shaft gear 2, the driven gear 3 of main reduction gear drives the planetary wheel 4 that is meshed with left half axle gear 1 and right axle shaft gear 2 and rotates around the rotation axis of left half axle gear 1 and right axle shaft gear 2 by center cross 5, the output shaft of electrical motor 8 connects drive axle 11 by transmission shaft, thereby drive wheels 12 is travelled.Driving engine 9, electrical generator 7 are installed in respectively on the chassis of automobile with electrical motor 8.
The engine controller 17 of switch, load torque and the rotating speed of control driving engine 9 is installed on driving engine 9, the engine controller 14 and the motor controller 13 of switch, rotating speed and the load torque of control electrical generator 7 and electrical motor 8 is installed on the chassis of automobile; Driving engine 9 is connected with engine controller 17 usefulness signal wire (SW)s, and electrical generator 7, engine controller 14, the storage battery 10, motor controller 13 and the electrical motor 8 that are installed on the car chassis are connected with cable successively; United and coordinating and the entire car controller (ECU) 16 of controlling engine controller 17, engine controller 14 and motor controller 13 also are installed in addition onboard, entire car controller 16 is accepted the key switch signal, acceleration pedal, brake pedal and gear, the speed of a motor vehicle, car load signal synthesis such as SOC control engine controller 17, engine controller 14 and motor controller 13, and then determine mode of operation between the three big propulsions source, make and satisfy the car load road when carrying power requirement, keep the battery SOC balance and the system that keeps in efficient district's work.Entire car controller 16 is connected with engine controller 17, engine controller 14 and motor controller 13 usefulness signal wire (SW)s respectively.The starter 15 that the control driving engine is opened is installed on the chassis of automobile.Consult Fig. 2, self-editing united and coordinating and the computer program device of controlling engine controller 17, engine controller 14 and motor controller 13 are housed on entire car controller 16, under the control of entire car controller 16, make driving engine, electrical generator and electrical motor realize following workflow as traditional diff of power coupling apparatus of hybrid power vehicle:
1. entire car controller 16 is looked into and is got a time step circulating vehicle speed;
2. entire car controller 16 is looked into and is got the current time step circulation speed of a motor vehicle;
3. entire car controller 16 receives when each assembly status signal of front drive system;
4. entire car controller 16 calculates road set torque (or power) demand and speed demand according to the current circulation speed of a motor vehicle and current acceleration;
5. according to the rotating speed of road idling speed demand calculating motor;
6. carry assembly status signals such as power demand and storage battery 10 state of charge according to the road, calculation engine 9 best operating point rotating speeds, torque, entire car controller 16 instructs to engine controller 17 output states;
7. according to diff rotating speed, torque relational expression:
e=ω gm
T g = T e 2 (formula I)
T L - T m = T e 2
In the formula: ω e, ω g, ω m--be respectively engine speed, generator speed and motor speed;
T e, T g, T m, T L--be respectively engine output torque, generator for electricity generation torque, electric electromechanics dynamic torque and load torque;
Because being calculated by the 6th step, driving engine (9) best operating point rotating speed, torque determine, but the rotating speed of calculating generator 7 and torque, and entire car controller 16 instructs to engine controller 14 output states;
8. require and the torque of above-mentioned formula I calculating motor according to the road set torque, and the motor speed determined of engagement step 5, entire car controller 16 instructs to motor controller 13 output states;
9. judge whether circulation finishes, if circulation does not finish, then repeats above-mentioned steps.
Consult Fig. 6, it is a kind of deriving device of the dynamic coupling device of Hybrid Vehicle shown in Figure 1, promptly on the basis of the dynamic coupling device of Hybrid Vehicle shown in Figure 1, on the input shaft in electrical motor 8 left sides, install electric control clutch 27 and electric clipper control brake 26 from right to left successively additional, when electric clipper control brake 26 separates, when power-transfer clutch 27 engaged, the dynamic coupling device of this Hybrid Vehicle and above-mentioned differential cross pin were identical.But by joint to drg 26, during power-transfer clutch 27 separating controlling, and, when tail-off, utilize the electric energy in the storage battery 10, only drive car load with electrical motor 8, realize pure motor driving; Because pure motor driving can make the SOC of storage battery 10 descend lower, when the SOC of storage battery 10 hanged down, driving engine 9 can participate in work, and electrical generator 7 is charged, the SOC of storage battery 10 can keep in the reasonable scope, and the SOC balance of maintenance storage battery 10 and the system that keeps are in efficient district's work.Consult Fig. 7, under the control of entire car controller 16, the dynamic coupling device of this deriving device makes driving engine 9, electrical generator 7 realize following workflow with electrical motor 8:
1. entire car controller 16 is looked into and is got a time step circulating vehicle speed;
2. entire car controller 16 is looked into and is got the current time step circulation speed of a motor vehicle;
3. entire car controller 16 receives when each assembly status signal of front drive system;
4. entire car controller 16 calculates road set torque (or power) demand and speed demand according to the current circulation speed of a motor vehicle and current acceleration;
5. entire car controller 16 carries power demand according to the speed of a motor vehicle, road and the assembly status signal judges whether pure motor driving;
6. if pure electronic, then cut-off clutch 27, and kill engine 9, electrical generator 7, instruct to motor controller 13 output states;
7. if not pure electronic, calculation engine 9 best operating point rotating speeds, torque, entire car controller 16 instructs to engine electric-controlled device 17 output states;
8. according to the car load rotating speed, calculating motor 9 rotating speeds, and utilize the rotating speed and the torque of diff rotating speed, torque relational expression I calculating generator 7, entire car controller 16 is to engine controller defeated 14 instruction that does well;
9. according to the car load rotating speed, calculating motor 8 rotating speeds and torque, entire car controller 16 instructs to motor controller 13 output states;
10. judge whether circulation finishes, if circulation does not finish, then repeats above-mentioned steps.
Principle of work of the present invention is:
Consult Fig. 1, driving engine 9 is as the major impetus source of hybrid vehicle, when running car, the driving gear 6 that driving engine 9 drives main reduction gear rotates, the driven gear 3 that the driving gear 6 of main reduction gear drives main reduction gear rotates, and the driven gear 3 of main reduction gear drives electrical generator 7 by center cross 5, planetary wheel 4, left half axle gear 1, right axle shaft gear 2 and left and right sides semiaxis and rotates with electrical motor 8.The power that requires during running car is mainly by driving engine 9 outputs, the power of driving engine 9 outputs divides two parts to be input to two mouths of diff by diff, electrical generator 7 generatings of wherein a part of power by being connected with the diff left end are charged to storage battery 10; Another part power then outputs to drive axle 11 by electrical motor 8 rotors and transmission shaft, and then drive wheels is travelled.When this part power of driving engine 9 can not satisfy driving demand (as the brish acceleration situation), then electronic by entire car controller (ECU) 16 control motors 8, satisfy the driving demand to replenish not enough power, at this moment, the electric energy that electrical generator 7 is stored in the storage battery 10 is exported by the motoring condition of electrical motor 8, promptly realizes the driving of uniting of driving engine 9 and electrical motor 8.When braking deceleration, electrical motor 8 also can serve as electricity generate function, the kinetic energy of car load is converted to electric energy stores 10 li of storage batterys.And when the power ratio that requires less (at the uniform velocity travelling as little load), driving engine 9 is adjusted in by entire car controller (ECU) 16 equally and seeks its best efficiency point work on the miniwatt curve.Three propulsions source of this dynamic coupling device institute bonded assembly (driving engine 9, electrical generator 7 and electrical motor 8) all participate in work in vehicle traveling process, and the takeoff output of driving engine 9 all by entire car controller (ECU) 16 controls, makes the best efficiency point on its horsepower curve that remains operating in the different stage size.
Consult Fig. 6, this deriving device is in order to satisfy car load with little load at the uniform velocity travel (desired driving power is very little), and when the electric flux that storage battery 10 stored is relatively sufficient and design-calculated, entire car controller 16 control electric control clutchs 27 separate, electric clipper control brake 26 engages, controlling driving engine 9 simultaneously closes with electrical generator 7, the electric energy that is stored by storage battery 10 comes driving motor 8 to rotate, and then reaching the automobile pure motor driving, entire car controller 16 may command electrical motors 8 are exported the required power demand of car loads.And in other cases, entire car controller 16 control electric clipper control brakes 26 separate, and electric control clutch 27 engages, and its principle of work and above-mentioned discussion are identical.Technical scheme shown in Figure 6 can realize the function of pure motor driving, has better vehicle performance.
Analysis of experiments:
Consult Fig. 3, Fig. 4 and Fig. 5, shown in Fig. 3 and Fig. 4 is the rotating speed that adopts each propulsion source in the entire test that traditional diff carries out as power coupling apparatus of hybrid power vehicle, the test figures curve of torque Changing Pattern.In this process of the test, comprise low speed segment acceleration, average rate, the moderating process of first half, and high regime acceleration, average rate and the moderating process of latter half.No matter in that part, motor speed 18 is followed the Changing Pattern of the speed of a motor vehicle, and driving engine all participates in work, and engine speed 19 all is adjusted to best efficiency point work by entire car controller 16 with engine operation torque 22.From rotation speed change law curve (consulting Fig. 3), engine speed 19 in the acceleration of low speed segment, at the uniform velocity and moderating process, and most of accelerator of high regime, at the uniform velocity process and moderating process, all be controlled in best stabilized speed point work, promptly change and isolate, and, make motor speed 18 follow the speed of a motor vehicle and change by generator speed 20 is controlled with the speed of a motor vehicle.And at the accelerator latter half of high regime, because the bearing power that requires increases, the best efficiency point that entire car controller 16 is regulated driving engines improves to more high-power place, i.e. engine speed 19 corresponding increases are carried the requirement of power to adapt to the road.Because engine speed 19 is controlled in best efficiency point work, its rotating speed and the speed of a motor vehicle are isolated, and have promptly realized similar traditional stepless shift function automatically, make the driving engine stable operation in best efficiency point, and oil consumption can significantly reduce with discharging.In addition, from each propulsion source torque variation rule curve (consulting Fig. 4), no matter in accelerator (is low speed segment, or high regime), engine operation torque 22 increases (its rotating speed is adjusted to stable point) gradually and carries power requirement to adapt to the road, at this moment, because a part of power of engine operation torque 22 outputs gives electrical generator 7 chargings, shown in electrical generator operation torque 23 curves, when engine operation torque 22 is not satisfied the road that requires when carrying power requirement, at this moment, replenish by electrical motor output motor operation torque 21.In the braking deceleration process, electrical motor 8 can also serve as electricity generate function, car load kinetic energy is carried out braking energy reclaim.
Consult Fig. 5, shown in Figure 5 is adopts each rotation speed relation correlation curve in the above-mentioned entire test that traditional diff carries out as power coupling apparatus of hybrid power vehicle.In whole process, three end rotating speeds of traditional diff coupling device satisfy following relation, and the twice 25 of engine speed just in time is generator speed and motor speed sum 24.This relation of traditional diff makes motor speed 18 follow the speed of a motor vehicle and change, and driving engine 9 is controlled in the work of optimum speed point, all regulates by the rotating speed of electrical generator 7 just.
The deriving device analysis of experiments:
Consult Fig. 8 and Fig. 9, Fig. 8 and shown in Figure 9 be rotating speed, the torque Changing Pattern test figures curve that adopts each propulsion source in another process of the test that this deriving device carries out as power coupling apparatus of hybrid power vehicle.In this process of the test, comprise low speed segment acceleration, average rate, the moderating process of first half equally, and high regime acceleration, average rate and the moderating process of latter half.In the accelerator of low speed segment, before accelerating to certain speed of a motor vehicle, entire car controller 16 at first is judged as pure motor driving, and control electric control clutch 27 separates, and electric clipper control brake 26 engages, kill engine simultaneously 9 with electrical generator 7 (this moment, SOC was higher); After accelerating to certain speed of a motor vehicle, entire car controller 16 requires driving engine 9 participation work, and at this moment, electric clipper control brake 26 separates, and electric control clutch 27 engages, and engine speed 19 increases with generator speed 20 thereupon; And in the high regime of latter half, driving engine 9 is worked all the time.This mode more can make car load oil consumption and discharging significantly reduce owing to increased the pure motor driving function more.
Also can find out from the curve of Fig. 9 in addition, when driving engine 9 work, engine operation torque 22 outputs are satisfied following relation with electrical generator operation torque 23: electrical generator 7 generatings are exported in the engine operation torque 22 of half, and electrical motor 8 ends are exported in second half torque, drive car load and travel.This also utilizes traditional diff dynamic transfer characteristics to distribute automatically, if driving engine 9 half torque can be satisfied the torque request of drive system, electrical motor 8 does not participate in work, and electrical generator 7 generatings are in 10 li store electrical energy of storage battery; If can not satisfy the requirement of driving to torque, electrical motor 8 participations drive, and release electrical generator 7 is stored in the electric energy in the storage battery 10, unite to drive the car load acceleration.When glancing impact takes place, electrical motor 8 also has electricity generate function, reclaims braking energy.This drive performance has realized the string and the pattern of typical hybrid power vehicle.By rational control policy, electrical generator 7 is converted to electric energy to half takeoff output of driving engine 9 and stores, braking procedure is by the regenerating braking energy of electrical motor 8 recovery in addition, two-part energy can be provided as next accelerator electrical motor 8 and participate in electrically operated energy, can realize the balance of the SOC of storage battery 10.
The analysis showed that by above-mentioned, can realize the pure electronic of hybrid vehicle with diff as the dynamic coupling device of hybrid vehicle, driving engine 9 work and charging, driving engine 9 is united typical hybrid power vehicle drive patterns such as driving, braking energy recovery with electrical motor 8.And, when making electrical motor 8, can keep driving engine 9 and work in optimum speed, torque point, thereby improve the economic performance of car load greatly along with the speed of a motor vehicle by regulator generator 7 rotating speeds.

Claims (4)

1. the dynamic coupling device of a Hybrid Vehicle, it is characterized in that, described dynamic coupling device is to adopt traditional diff, the left half axle gear of this diff (1) passes through a left side respectively with right axle shaft gear (2), right axle shaft connects electrical generator (7) and electrical motor (8), the driving gear of main reduction gear (6) is fixedly connected on the output shaft of driving engine (9), the driving gear of main reduction gear (6) is meshed in both rotation axis coplanes and mutually perpendicular state with the driven gear (3) of main reduction gear, the driven gear of main reduction gear (3) is same rotation axis with left half axle gear (1), the driven gear of main reduction gear (3) drives the planetary wheel (4) that is meshed with left half axle gear (1) and right axle shaft gear (2) and rotates around the axis of left half axle gear (1) and right axle shaft gear (2) by center cross (5), the output shaft of electrical motor (8) connects drive axle (11) by transmission shaft, and drive wheels (12) is travelled; Driving engine (9), electrical generator (7) are installed in respectively on the chassis of automobile with electrical motor (8).
2. according to the dynamic coupling device of the described Hybrid Vehicle of claim 1, it is characterized in that, electric control clutch (27) and electric clipper control brake (26) are installed on the input shaft in electrical motor (8) left side from right to left successively, and they are connected with signal wire (SW) with entire car controller (16) respectively.
3. according to the dynamic coupling device of claim 1 or 2 described Hybrid Vehicles, it is characterized in that, the engine controller (17) of switch, load torque and the rotating speed of control driving engine (9) is installed on driving engine (9), the engine controller (14) and the motor controller (13) of switch, rotating speed and the load torque of control electrical generator (7) and electrical motor (8) is installed on the chassis of automobile; Driving engine (9) is connected with signal wire (SW) with engine controller (17), and electrical generator (7), engine controller (14), the storage battery (10), motor controller (13) and the electrical motor (8) that are installed on the car chassis are connected with cable successively; United and coordinating and the entire car controller (16) of controlling engine controller (17), engine controller (14) and motor controller (13) are installed onboard, entire car controller (16) is connected with signal wire (SW) with engine controller (17), engine controller (14) and motor controller (13) respectively, and the starter (15) that control driving engine (9) is opened is installed on the chassis of automobile.
4. according to the dynamic coupling device of the described Hybrid Vehicle of claim 3, it is characterized in that, self-editing united and coordinating and the computer program device of controlling engine controller (17), engine controller (14) and motor controller (13) are housed on entire car controller (16), under the control of entire car controller (16), make driving engine (9), electrical generator (7) realize following workflow with electrical motor (8) as traditional diff of power coupling apparatus of hybrid power vehicle:
1) entire car controller (16) is looked into and is got a time step circulating vehicle speed;
2) entire car controller (16) is looked into and is got the current time step circulation speed of a motor vehicle;
3) entire car controller (16) receives when each assembly status signal of front drive system;
4) entire car controller (16) calculates road set torque demand and speed demand according to the current circulation speed of a motor vehicle and current acceleration;
5) according to the rotating speed of road idling speed demand calculating motor;
6) carry power demand and storage battery (10) state of charge according to the road, calculation engine (9) best operating point rotating speed, torque, entire car controller (16) instructs to engine controller (17) output state;
7) according to diff rotating speed, torque relational expression:
e=ω gm
T g = T e 2
T L - T m = T e 2
In the formula: ω e, ω g, ω m---be respectively engine speed, generator speed and motor speed;
T e, T g, T m, T L---be respectively engine output torque, generator for electricity generation torque, electric electromechanics dynamic torque and load torque;
Because driving engine (9) best operating point rotating speed, torque are by the 6th) step calculates and determines, but the rotating speed of calculating generator and torque, entire car controller (16) instructs to engine controller (14) output state;
8) require and the torque of above-mentioned formula calculating motor according to the road set torque, and engagement step 5) definite motor speed, entire car controller (16) instructs to motor controller (13) output state;
9) judge that whether circulation finishes, if circulation does not finish, then repeats above-mentioned steps.
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