Stepless change mixed power electric car drive system
The utility model belongs to field of hybrid electric vehicles, relates in particular to a kind of stepless change mixed power electric car drive system.
The power resources of hybrid vehicle are in combustion engine and drive motor, and the management by closed-center system (storage battery, super capacitor etc.) and control system flow energy realizes best energy distribution, realizes low oil consumption, anti-emission carburetor and the higher dynamic property of car load.
Hybrid vehicle has two power resources, and when startup and low speed driving, hybrid power system only utilizes the power of electrical motor to travel, because at this moment the efficient of driving engine is not high.Engine efficiency is very high when generally travelling, and the power that driving engine produces is not only the propulsive effort of wheel, also is used for simultaneously generating electricity driving electrical motor, and charges a battery.Slowing down or glancing impact, hybrid power system is with the rotational force driving motor generating of wheel, with energy recovery in storage battery.
Owing to there is the power-assisted of electrical motor, guaranteed that automobile has identical tractive performance, reduce the power and the discharge capacity requirement of hybrid electric vehicle engine simultaneously, and then reduced the fuel oil consumption of automobile; Simultaneously, have the recovery function of regeneration and braking energy, further reduced the fuel oil consumption of automobile; Two systems of oil electricity cooperatively interact, and can optimize the operation point of driving engine, make engine operation at the most economical state of fuel oil, and the oil consumption of car load and discharging are significantly reduced.
Possess the hybrid vehicle of pure motorized motions pattern at present owing to will realize generating, drive numerous functions such as start the engine, often adopt two motors, and complicated power coupling mechanism has been arranged, thereby increased cost, cause system complex, take many spaces simultaneously.The technical difficult points of hybrid power is: combustion engine cooperates with electrical motor, how both to have guaranteed identical tractive performance, reduces oil consumption and discharging again, and this also is the ultimate aim of hybrid power.
China's utility application has disclosed a kind of electric automobile without gear case No. 200610034372.1, comprise combustion engine, motor, power-transfer clutch, electrokinetic cell and whole-control system, it is characterized in that: have only a drive motor between combustion engine and transmission shaft, this drive motor also can be operated in generating state.The defective of this scheme is: have only a drive motor between combustion engine and transmission shaft, generating can not exist simultaneously with the driving two states, so combustion engine can not get sufficient utilization, combustion engine can not cooperate flexibly with motor, does not have the tandem working pattern in the hybrid power; When internal combustion engine during at high efficient area, superfluous power can not get the actv. utilization, so fuel economy can not be fine.
The utility model not only has the advantage described in the above-mentioned patent, and has remedied its shortcoming.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiency that above-mentioned prior art exists, and a kind of high efficiency combustion engine master mode is provided, and obtains the mixed power automobile driving system of better fuel economy.
Described stepless change mixed power electric car drive system is made up of combustion engine 1, output shaft 5, electrical generator 2, Automatic Transmission 3, drive motor 4, and wherein electrical generator 2 links to each other the internal-combustion engine drives generator for electricity generation with described combustion engine 1.The input end of Automatic Transmission 3 links to each other with combustion engine 1 machinery, and mouth links to each other with drive motor 4 machineries.Combustion engine 1, Automatic Transmission 3 and drive motor 4 are coaxial linking to each other, and integrated linking together.
If the under power of described combustion engine, described stepless change mixed power electric car drive system provide auxiliary power with driving condition work, for described combustion engine; If the power surplus of described combustion engine, described stepless change mixed power electric car drive system is with the work of electrical generator state, and the electric energy that sends replenishes to closed-center system.
Advantage of the present utility model is that a kind of infinite variable speed mixed power automobile driving system that provides links to each other successively by electrical generator, Automatic Transmission and drive motor are coaxial; Described generating drives integrated drive system and cooperates with combustion engine, changes the original service conditions of combustion engine, makes combustion engine operate in the most economical state of fuel oil all the time; The utility model drives coaxial integrated system by being beneficial to the generating that cooperates with internal combustion engine output shaft, can change the service conditions of combustion engine timely, makes it have better fuel economy.Simultaneously the utility model stepless change mixed power electric car driving system structure simple compact, be easy to control, product is easy to realize.In actual operating mode, this power system has been taken into account low speed, at a high speed, makes driving engine be in high school district all the time and has the characteristics of oil saving and pollution reducing.
Description of drawings
Fig. 1 is the utility model stepless change hybrid vehicle block diagram.
The specific embodiment
As accompanying drawing 1,1st, combustion engine, the 2nd, electrical generator, the 3rd, Automatic Transmission, the 4th, drive motor, the 5th, output shaft, the 6th, wheel.
Stepless change mixed power electric car drive system mainly is made up of combustion engine 1, output shaft 5, electrical generator 2, Automatic Transmission 3, drive motor 4, and wherein electrical generator 2 links to each other the internal-combustion engine drives generator for electricity generation with described combustion engine 1; The input end of Automatic Transmission 3 links to each other with combustion engine 1 machinery, and mouth links to each other with drive motor 4 machineries; Combustion engine 1, Automatic Transmission 3 and drive motor 4 are coaxial linking to each other, and integrated linking together.
When automobile starting, hybrid power system only uses the dynamic start that the electrical motor of energy is provided by storage battery, and at this moment driving engine does not turn round.Because driving engine can not be at low rotating band output high pulling torque, and electrical motor can be sensitive, smooth and easy, start efficiently.
Low speed-when driving at moderate speed, travel by the direct motor drive of efficiently utilizing energy, unsatisfactory in the efficient of low speed-middle speed belt for driving engine, and another side, electrical motor is in low speed-middle speed belt superior performance.Therefore, with low speed-when driving at moderate speed, hybrid power system uses the electric power of storage battery, and driving motor travels.But, when the electric weight of storage battery after a little while, utilize driving engine to drive generator for electricity generation, for electrical motor provides power.
When generally travelling, the driving of low oil consumption uses driving engine as the major impetus source, and hybrid power system adopts driving engine, and it is driven at the speed band that can produce highly efficient power.Power direct drive wheel by driving engine produces is assigned to electrical generator according to driving condition part power.The power that is produced by electrical generator is used for driving motor.Utilize this dual driving system of driving engine and electrical motor, the power that driving engine produces is passed earthward with minimal consumption.When the electric weight of storage battery after a little while, engine output can be enhanced to strengthen electric energy generated, charges a battery.
When at full speed driving (travelling) into, utilize the double dynamical more higher leveled acceleration that obtains, when the powerful acceleration force of needs (as climb very steep slopes and overtake other vehicles), storage battery also provides electric power, strengthens the propulsive effort of electrical motor.By driving engine and double dynamical being used in combination of electrical motor, hybrid power system is achieved the powerful and smooth acceleration capability with high first class engine peer-level.
During deceleration/energy regeneration, the energy recovery during with deceleration is used for utilizing in storage battery again; When stepping on drg and pine tar door, hybrid power system makes the rotational force of wheel drive motor operation, and it is used as electrical generator.Usually the energy that loses as friction heat during deceleration is converted into electric energy at this, is recovered in the storage battery and utilizes.
Power system all stops during parking, and driving engine, electrical motor, electrical generator all shut down automatically.Can not waste energy because of idling.But when the charge volume of storage battery hangs down, driving engine will remain in operation, to charge a battery.In addition sometimes because of with the air conditioning switch interlock, driving engine can still keep the running.