CN110466362A - The efficient speed change gear of electric automobile energy saving and its control method - Google Patents
The efficient speed change gear of electric automobile energy saving and its control method Download PDFInfo
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- CN110466362A CN110466362A CN201910784163.6A CN201910784163A CN110466362A CN 110466362 A CN110466362 A CN 110466362A CN 201910784163 A CN201910784163 A CN 201910784163A CN 110466362 A CN110466362 A CN 110466362A
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- Prior art keywords
- gear
- speed change
- energy saving
- electric automobile
- motor
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/32—Control or regulation of multiple-unit electrically-propelled vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/42—Electrical machine applications with use of more than one motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
The efficient speed change gear of electric automobile energy saving of the present invention belongs to transmission technology field；Technical problem to be solved are as follows: a kind of efficient speed change gear of electric automobile energy saving is provided, selects different one or more motors as main driving according to throttle signal and current vehicle condition, energy-saving consumption-reducing, speed change is steady, reduces manufacture difficulty, saves manufacturing cost；The technical solution of use are as follows: the efficient speed change gear of electric automobile energy saving, including transmission shaft, multi-stage gear group and multiple motors, the driven wheel of multi-stage gear group passes through unilateral bearing and is mounted on transmission shaft, and the driving wheel of multi-stage gear group is separately fixed on the output shaft of multiple motors；The present invention is realized to be exported jointly according to the different motors of real-time vehicle condition selection starting or different motor combinations, reduces power and output is lost in vain, realize energy-saving consumption-reducing.
Description
Technical field
The efficient speed change gear of electric automobile energy saving of the present invention and its control method belong to transmission technology field, and in particular to
The speed change gear of electric car.
Background technique
Electric car is using vehicle power supply as power, with the vehicle of motor driven wheels travel, due to effect on environment phase
Smaller to orthodox car, its prospects are considered optimistic wildly, but current techniques are still immature.Electric vehicle industry technology needs higher order
Demand, i.e. raising ride comfort reduce energy consumption, and electric car is enable to surmount the traditional oil consumption automobile of substitution completely in future.And it is electric
Electrical automobile transmission range is more, and power linking is more careful, and ride comfort is naturally better.The shift speed change of conventional electric car,
Mostly it is that two kinds of power drive units is used to realize: 1, transmission shaft is driven with a heavy-duty motor, such driving device lacks
Be trapped in excessively high in motor manufacturing cost, starting current demand is larger, and car body advance in energy consumption it is excessively high；2, with a mid power
Motor cooperation gearbox drive transmission shaft, the defect of this driving device is to increase the cost of gearbox, and energy consumption is still
It is old excessively high.
Summary of the invention
The present invention overcomes the shortcomings of the prior art, technical problem to be solved are as follows: provides a kind of electric car section
Can efficiently speed change gear and its control method, according to throttle signal and current vehicle condition select different one or more motors as
Main driving, energy-saving consumption-reducing, speed change is steady, reduces manufacture difficulty, saves manufacturing cost.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: the efficient speed change gear of electric automobile energy saving,
Including transmission shaft, multiple gear sets and multiple motors, the driven wheel of multiple gear sets passes through unilateral bearing and is mounted on transmission shaft
On, the driving wheel of multiple gear sets is separately fixed on the output shaft of multiple motors.
The transmission ratio of the multiple gear set is identical.
The driven wheel of the multiple gear set pass through unilateral bearing be mounted on transmission shaft and its gear radius on to
Under be sequentially reduced.
The gear radius of the driving wheel of the multiple gear set is sequentially increased from top to bottom.
The gear radius of the driving wheel of the multiple gear set is identical.
The multiple gear set includes the one-stage gear group, secondary gear group and tertiary gear successively installed from top to bottom
Group, one-stage gear group driven wheel, secondary gear group driven wheel and tertiary gear group driven wheel pass through unilateral bearing and are mounted on biography
On moving axis.
Retarder is mounted on the output shaft of the multiple motor, the output end of the transmission shaft is connected with deceleration dress
It sets.
The power of the multiple motor is identical or power is sequentially increased.
The control method of the efficient speed change gear of electric automobile energy saving, includes the following steps:
S1: starting controller；
S2: controller real-time monitoring throttle signal, and according to the starting quantity of the size of throttle signal selection motor, in setting
It is interior that successively the selected motor started of starting, car body start from top to bottom；
S3: controller real-time monitoring automobile driving speed, walking road conditions and throttle signal again；
S4: when controller monitors that throttle signal, controller cooperate current automobile according to the throttle signal size monitored again
Travel speed, walking road conditions calculate the required torque of vehicle and driving power, and according to number of motors is had been turned on, selection is closed
Close or start motor.
Walking road conditions in the S3 and S4 include level walking, ascents and descents.
Compared with the prior art, the invention has the following beneficial effects:
Multiple motors are rotated respectively by multiple gear set drive transmission shafts, it can be achieved that being opened according to real-time vehicle condition selection in the present invention
It moves different motors or different motor combinations exports jointly, reduce power and output is lost in vain, realize energy-saving consumption-reducing, and due to driven
Wheel passes through unilateral bearing with transmission shaft and connect, then the speed change between two gear is surmounted by the variation realization of speed difference
Clutch function, to realize steady speed change, power linking is careful, and car body speed change ride comfort is good, more stable, the no shelves of car body traveling
Position variation pause and transition in rhythm or melody sense, being equivalent to realizes variable speed；Compared with typical high power, using multiple small-powers or middle power motor
It is applied in combination, starting current reduces, and motor manufacturing difficulty reduces, to reduce manufacturing cost.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing；
Fig. 1 is one structural schematic diagram of embodiment of the efficient speed change gear of electric automobile energy saving of the present invention；
Fig. 2 is two structural schematic diagram of embodiment of the efficient speed change gear of electric automobile energy saving of the present invention；
In figure: 1 is transmission shaft, and 2 be gear set, and 3 be motor, and 4 be unilateral bearing, and 21 be driven wheel, and 22 be driving wheel.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the reality in the present invention
Example is applied, technical solution of the present invention is clearly and completely described, it is clear that described embodiment is one of the invention
Divide embodiment, instead of all the embodiments；Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
The efficient speed change gear of electric automobile energy saving of the present invention, including transmission shaft 1, multiple gear sets 2 and multiple motors 3 are more
The driven wheel 21 of a gear set 2 is mounted on transmission shaft 1 by unilateral bearing 4, and the driving wheel 22 of multiple gear sets 2 is solid respectively
It is scheduled on the output shaft of multiple motors 3.The starting of multiple motors 3 is controlled by the controller of automobile with closing.Control
Device actively calculates driving energy needed for vehicle by vehicle condition, and selection starts different motors.
Unilateral bearing is a kind of bearing that can be freely rotated, and lock in one direction in the other directions,
It is freewheel clutch.In the present invention, the installation standard of unilateral bearing is that rotating speed of transmission shaft is higher than unilateral bearing then unilateral bearing
Idle running.For example, when primary motor drives transmission shaft rotation by unilateral bearing, since shaft speed is lower than unilateral bearing,
Unilateral bearing is rotated to locked direction at this time, then primary motor can drive transmission shaft rotation by unilateral bearing；When starting two
Grade motor drives the revolving speed of transmission shaft to be gradually higher than the revolving speed of primary motor, then the revolving speed of unilateral bearing is lower than transmission shaft at this time,
Then it relatively rotates the opposite direction that direction is exactly transmission shaft rotation, and both for direction is freely rotated, unilateral bearing dallies at this time.
It is that the structure being mounted on transmission shaft 1 with driven wheel 21 by unilateral bearing 4 realizes its function in the present invention, it can be with
Understand, can also be fixed on transmission shaft 1 using driven wheel 21 in this configuration, and driving wheel 22 is made to pass through unilateral bearing 4
It is mounted on the output shaft of motor 3, to realize the structure replacement of its function.
The control method of the efficient speed change gear of electric automobile energy saving, includes the following steps:
S1: starting controller；
S2: controller real-time monitoring throttle signal, and according to the starting quantity of the size of throttle signal selection motor 3, it is setting
Successively the selected motor 3 started of starting, car body start from top to bottom in time；
S3: controller real-time monitoring automobile driving speed, walking road conditions and throttle signal again；
S4: when controller monitors that throttle signal, controller cooperate current automobile according to the throttle signal size monitored again
Travel speed, walking road conditions calculate the required torque of vehicle and driving power, and according to number of motors is had been turned on, selection is closed
Close or start motor.
Walking road conditions in the S3 and S4 include level walking, ascents and descents.
The multiple gear set 2 refers at least two gear sets 2 in the present invention, enumerates by taking three gear sets as an example below
The gear set structure of two kinds of different speed ratios is described in detail.
Embodiment one
As shown in Figure 1, the multiple gear set 2 includes one-stage gear group, the secondary gear group and three successively installed from top to bottom
Grade gear set, one-stage gear group driven wheel, secondary gear group driven wheel and tertiary gear group driven wheel are pacified by unilateral bearing
On transmission shaft, the transmission ratio of the multiple gear set 2 is identical, i.e., the speed ratio of multiple gear sets 2 is identical.
The present embodiment is that driving needed for needing controller to be calculated according to throttle signal and road conditions can select electric motor starting quantity,
To overcome car body running resistance, make the more laborsaving convenience of car body walking.For example, an electricity may be selected in car body in level walking
Machine starting, makes its driving that can guarantee that car body at the uniform velocity smoothly drives safely on level land；It, can be under when reaching descending section
Slope speed selects one low-power motor of switching by controller, and car body assigns the potential energy and low-power motor of car body by descending
Driving energy, can be realized car body smooth-ride, energy-saving consumption-reducing；It when needing to accelerate or reach uphill way, steps on the throttle, controls
For device according to road conditions and the size of throttle signal, two to three motors are opened in selection, and the sum of driving energy makes car body steadily fast enough
Accelerated fastly by upward slope section or realization.In the present embodiment, the motor of equal-wattage can be used in three motors, can also be used not
With the motor (i.e. the identical speed ratio of same motor and the identical speed ratio of different motors) of power.The above is only one embodiment of this invention
For example, organization plan and implementation method of the invention includes but is not limited to above description.
Embodiment two
As shown in Fig. 2, the multiple gear set 2 includes one-stage gear group, the secondary gear group and three successively installed from top to bottom
Grade gear set, one-stage gear group driven wheel, secondary gear group driven wheel and tertiary gear group driven wheel are pacified by unilateral bearing
On transmission shaft 1, and its gear radius is sequentially reduced from top to bottom, and 22 radius of driving wheel of three gear sets 2 can be identical,
It can be sequentially increased from top to bottom.
The present embodiment uses three motors, and the speed ratio of three gear sets 2 is different, in automobile initial start, controller root
The motor of starting one-stage gear group is selected according to throttle signal, the motor of one-stage gear group drives transmission shaft 1 by one-stage gear group
Rotation, travels at a slow speed to start automobile；When needing to raise speed, controller according to current vehicle speed and the size of throttle signal,
Torque and driving power needed for calculating vehicle, autonomous selection need motor to be started, such as according to current vehicle speed and throttle signal
Size needs to select the motor in secondary gear group, and at the electric motor starting initial stage of secondary gear group, transmission shaft 1 is still by level-one
The motor of gear set does main driving, when the motor of secondary gear group drives the revolving speed of secondary gear group and one-stage gear group to maintain an equal level
Or when being less than the highest setting speed of one-stage gear group motor, two motors are worked in coordination acting, when secondary gear group drives
When the revolving speed of transmission shaft 1 is more than the highest setting speed of one-stage gear group motor, secondary motor does main driving, and in one-way shaft
Under the action of holding, one-stage gear group then dallies, then its motor is closed to reduce energy consumption；When road conditions, speed and throttle signal again
Secondary change, controller select different motors again according to fact, the course of work with it is similar to the above process.
The scheme that 22 radius of driving wheel in the present embodiment according to three gear sets 2 is sequentially increased from top to bottom, such as Fig. 2
Shown, then the driving and driven gear of one-stage gear group is that small band is big, has large torque, makes the Acceleration of starting of automobile faster；Secondary gear
The driving and driven gear of wheel group is to have middle torque in middle band；The driving and driven gear of tertiary gear group is greatly to have small torsion with small
Square, then can be more energy saving in running at high speed.
The present invention can be monitored in real time by controller and be calculated according to climb and fall road conditions, throttle acceleration and speed demand, choosing
Energy consumption is saved in the motor work for selecting different capacity, and relative to traditional drives, requires to substantially reduce to motor performance, from
And manufacturing cost and production difficulty are reduced, power of motor reduces, and the starting current needed reduces, and extends identical electricity indirectly
The traveling duration and mileage of lower automobile are measured, and speed change transition is steady, comfort is stronger, to improve the market competition of electric car
Power.
The different service conditions of kinds of schemes of the present invention are illustrated below by way of citing, in order to make it easy to understand, below
Citing is explained in detail using three groups of motors and gear set, but its usage mode is not limited to three groups of motors and gear set:
1, speed ratio identical with power motor
Assuming that multiple motors 3 are No.1 motor, No. two motors and No. three motors, three powers of motor are all A, three gear sets 2
Speed ratio be B, then after its starting:
A, starting, controller monitoring throttle signal size, driver step on the gas compared with gently then throttle signal is small, step on the gas heavier then oily
Gate signal is big, controller selection No.1 electric motor starting start to walk, if driver step on the gas it is heavier if throttle signal it is big, controller
Selection No.1 motor and No. two motors are actuated for starting to walk simultaneously or even three motors while start as starting；
B drives at a constant speed, and when running car is at the more section of people, needs to control car body and slowly moves, and controller selects at this time
Starting No.1 motor realization slowly drives at a constant speed, when its die Dorfstrasse when driving, optional No.1 motor and No. two motors are same
Shi Qidong realization is driven at moderate speed, and when it is when running at high speed, optional three motors start simultaneously；
C accelerates, and when automobile is accelerated, driver selects the light and heavy degree stepped on the gas according to present speed, control
Device monitors throttle signal size, selects the motor that should start, such as from promotion is slowly driven at a constant speed to when driving at moderate speed, In
In the case that No.1 motor has been turned on, start No. two motors, reduce motor load, to more easily control drive and improve transmission
The revolving speed of axis realizes that car body accelerates；
D goes up a slope, when encountering upward slope in traveling, if drivers select the weight stepped on the gas according to the gradient at this time to travel at a slow speed
Degree accelerates in advance, in the case where the No.1 motor of script has been turned on, carries out selection starting to No. two motors and No. three motors,
Such as the gradient it is smaller when, gently step on the gas before going up a slope, start No. two motors, No.1 motor and No. two motors do work to car body simultaneously
It mentions to middling speed to pass through slopes；When the gradient is larger, steps on the gas again before going up a slope, starts No. two motors and No. three motors,
Three motors do work simultaneously mentions to high speed to pass through slopes car body.
2, the identical speed ratio of different capacity motor
Assuming that multiple motors 3 be power be C No.1 motor, No. two motors that power is D and power be E No. three motors, and C
< D < E, the speed ratio of three gear sets 2 is F, the user of the design scheme application method and speed ratio identical with power motor
Formula is identical, is based only upon the selection that user carries out power of motor to car body performance requirement, so that running car is more smooth, speed
Gear switch is more quickly and steady.
3, different capacity motor difference speed ratio
Assuming that multiple motors 3 be power be G No.1 motor, No. two motors that power is H and power be I No. three motors, and G
< H < I, the speed ratio of No.1 motor corresponding gear group are J, and the speed ratio of No. two motor corresponding gear groups is K, No. three motor corresponding teeths
The speed ratio of wheel group is L, J > K > L, then after its starting:
A, starting, controller monitoring throttle signal size, driver step on the gas compared with gently then throttle signal is small, step on the gas heavier then oily
Gate signal is big, and when driver steps on the gas lighter when starting, controller selection No.1 electric motor starting is started to walk after starting, because its
Speed ratio is J, and gear set is that small band is big, has large torque, keeps the starting of automobile more stable and quick, then No.1 motor is quick
It is driven at a constant speed after shaft revolving speed is adjusted to appropriate low velocity, starting is completed；When driver steps on the gas heavier when starting, open
Controller equally selects No.1 electric motor starting to start to walk after dynamic, because its speed ratio is J, gear set is that small band is big, has big turn round
Square keeps the starting of automobile more stable and quick, and then No. two electric motor starting cooperation No.1 motors are done work simultaneously by shaft revolving speed
It is adjusted to appropriate middling speed to be driven at a constant speed, starting is completed；
B drives at a constant speed, and when running car is at the more section of people, needs to control car body and slowly moves, and controller selects at this time
Starting No.1 motor realization slowly drives at a constant speed, when its die Dorfstrasse when driving, optional No.1 motor and No. two motors are same
Shi Qidong realization is driven at moderate speed, and when it is when running at high speed, optional No. two motors and No. three motors start realization high speed simultaneously
Traveling；
C accelerates, and when automobile is accelerated, driver selects the light and heavy degree stepped on the gas according to present speed, control
Device monitors throttle signal size, selects the motor that should start, such as from promotion is slowly driven at a constant speed to when driving at moderate speed, can
Selection No. two motors of starting or No. three motors realize that car body accelerates to more easily control drive and improve the revolving speed of transmission shaft, and
Advantage of the present design in car body acceleration be, according to the different current driving speed of aftercarriage is accelerated, after speed change, mainly
Motor except one or two motor of acting can generate idle running phenomenon, and controlling under the requirement for not meeting current vehicle speed
Device processed monitors to close the motor when such case in order to avoid electric energy is lost in vain；
D goes up a slope, when encountering upward slope in traveling, if drivers select the weight stepped on the gas according to the gradient at this time to travel at a slow speed
Degree accelerates in advance, in the case where the No.1 motor of script has been turned on, carries out selection starting to No. two motors and No. three motors,
Such as the gradient it is smaller when, gently step on the gas before going up a slope, start No. two motors, No.1 motor and No. two motors do work to car body simultaneously
It mentions to middling speed to pass through slopes；When the gradient is larger, steps on the gas again before going up a slope, starts No. two motors and No. three motors,
No.1 motor dallies under unilateral bearing effect and is controlled by a controller stalling when speed is higher, and No. two motors and No. three motors are same
When acting car body is mentioned to high speed to pass through slopes.
Mountable retarder on the output shaft of multiple motors 3, the output end of transmission shaft 1 can also connect deceleration in the present invention
Device realizes the matching of motor speed and speed parameter.
The present invention is directed to the friction speed of car body, road conditions and speed change are realized by the cooperation of multiple motors and gear set
Demand, can not only meet the needs of existing all automobiles, and can further be promoted and motor will not be significantly increased
Cost, for example, existing electric motor of automobile maximum power be 240kw, then the present invention in three motors can be used respectively 80kw,
The motor of 100kw, 120kw, a combination thereof performance adapts to the demand of existing car body, and performance is more preferable, however motor cost and manufacture
Difficulty but significantly reduces；And if the motor of 80kw, 120kw, 240kw is respectively adopted in three motors in the present invention, group
It closes performance and is then far longer than existing car body, be conducive to the further promotion of automotive performance, however it promotes difficulty compared to motor
The promotion difficulty of power then can be neglected.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. the efficient speed change gear of electric automobile energy saving, it is characterised in that: including transmission shaft (1), multiple gear sets (2) and multiple electricity
Machine (3), the driven wheel (21) of multiple gear sets (2) are mounted on transmission shaft (1) by unilateral bearing (4), multiple gear sets
(2) driving wheel (22) is separately fixed on the output shaft of multiple motors (3).
2. the efficient speed change gear of electric automobile energy saving according to claim 1, it is characterised in that: the multiple gear set
(2) transmission ratio is identical.
3. the efficient speed change gear of electric automobile energy saving according to claim 1, it is characterised in that: the multiple gear set
(2) driven wheel (21) is mounted on transmission shaft (1) by unilateral bearing (4) and its gear radius successively subtracts from top to bottom
It is small.
4. the efficient speed change gear of electric automobile energy saving according to claim 3, it is characterised in that: the multiple gear set
(2) gear radius of driving wheel (22) is sequentially increased from top to bottom.
5. the efficient speed change gear of electric automobile energy saving according to claim 3, it is characterised in that: the multiple gear set
(2) gear radius of driving wheel (22) is identical.
6. the efficient speed change gear of electric automobile energy saving described in -5 any one according to claim 1, it is characterised in that: described more
A gear set (2) includes the one-stage gear group, secondary gear group and tertiary gear group successively installed from top to bottom, one-stage gear group
Driven wheel, secondary gear group driven wheel and tertiary gear group driven wheel pass through unilateral bearing and are mounted on transmission shaft.
7. the efficient speed change gear of electric automobile energy saving described in -5 any one according to claim 1, it is characterised in that: described more
Retarder is mounted on the output shaft of a motor (3), the output end of the transmission shaft (1) is connected with deceleration device.
8. the efficient speed change gear of electric automobile energy saving described in -5 any one according to claim 1, it is characterised in that: described more
The power of a motor (3) is identical or power is sequentially increased.
9. the control method of the efficient speed change gear of electric automobile energy saving as described in claim 1, which is characterized in that including as follows
Step:
S1: starting controller；
S2: controller real-time monitoring throttle signal, and according to the starting quantity of the size of throttle signal selection motor (3), it is setting
Successively the selected motor (3) started of starting, car body start from top to bottom in fixing time；
S3: controller real-time monitoring automobile driving speed, walking road conditions and throttle signal again；
S4: when controller monitors that throttle signal, controller cooperate current automobile according to the throttle signal size monitored again
Travel speed, walking road conditions calculate the required torque of vehicle and driving power, and according to number of motors is had been turned on, selection is closed
Close or start motor.
10. the control method of the efficient speed change gear of electric automobile energy saving according to claim 9, it is characterised in that: described
Walking road conditions in S3 and S4 include level walking, ascents and descents.
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Application publication date: 20191119 |