CN207000221U - A kind of descending control system, gradient module and electric car - Google Patents
A kind of descending control system, gradient module and electric car Download PDFInfo
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- CN207000221U CN207000221U CN201720355777.9U CN201720355777U CN207000221U CN 207000221 U CN207000221 U CN 207000221U CN 201720355777 U CN201720355777 U CN 201720355777U CN 207000221 U CN207000221 U CN 207000221U
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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 utility model discloses a kind of descending control system of electric car, gradient module and electric car.The descending control system includes signal input module, gradient module, descending supplementary module, stable supplementary module and decoupling module；The first input end of the first output end connection descending supplementary module of the signal input module, the input of second output end stable connection supplementary module, 3rd output end connects the input of gradient module, the output end of the gradient module connects the second input of the descending supplementary module, the input of the output end connection decoupling module of the descending supplementary module, the interaction end of the interaction end connection decoupling module of the stable supplementary module.The utility model realizes active brake by decoupling module, so as to improve the security of vehicle and stability.
Description
Technical field
The utility model belongs to electric car control field, descending control system, slope more particularly, to a kind of electric car
Spend module and electric car.
Background technology
Orthodox car is real by means of engine braking and mechanical active brake system or electronic stability controlling system (ESP)
The now slow drop function in slope, by the default speed upper limit so that driver can control vehicle calmly.But because traditional vehicle is set
Fixed desired speed is fixed value, i.e., is the fixed value on the ramp of different gradient, lacks adaptivity.
The gradient is generally detected by Slope Transducer, Inertial Measurement Unit in electric car, once descending accessory system
(HDC) open, preferentially braked by motor main brake, mechanical active brake system supplymentary, descending miscellaneous function can be realized again
Certain braking energy can be reclaimed.
Meanwhile machine driven system is not fully taking into account vehicle just in addition to transmission efficiency is low, control accuracy is poor yet
In normal descent run and braking procedure, left and right wheelses during due to Ackermann steer angle body roll and left and right coefficient of road adhesion difference
Brake force is uneven, and then the seized potential danger operating mode of traversing sideslip, left and right wheelses occurs, once potential danger operating mode
Occur, mechanical active brake system can not accurately identify danger, can not make the operation for correctly increasing and turning round, subtract torsion, except influenceing
Beyond comfortableness, it is also possible to vehicle rollover, brake side-slipping can be caused, lose the more serious consequence such as steering capability.Such as patent
Document CN104442763 A and CN204323312 U.Existing automobile includes new-energy automobile simultaneously, and descending accessory system is borrowed
Help Inertial Measurement Unit or the Slope Transducer detection gradient, belong to newly-increased structural member, add system cost.And at present
There is EVB (electronic vacuum booster) although product can equally realize active brake, but these products are traditional braking mechanisms
Upgrade version, can not equally avoid the shortcomings that mentioned above.
The electronic stability controlling system of prior art by the increasing to wheel braking moment, subtract to ensure that vehicle does not lose
Surely, wheel is non-slip.When there is unsafe condition in vehicle, if ESP system performs according to the instruction of ESP oneself logical calculateds,
Vehicle is not in danger naturally, once but motor now wheel is continued to brake, be equivalent to ESP instructions and subtract when subtracting moment of torsion
Increasing moment of torsion is excessive when moment of torsion deficiency, increasing moment of torsion, so as to which the operation to vehicle causes certain danger.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of descending control system, its
Purpose is to realize active brake by decoupling module, so as to improve the security of vehicle and stability.
To achieve the above object, according to one side of the present utility model, there is provided a kind of descending control system, including letter
Number input module, gradient module, descending supplementary module, stable supplementary module and decoupling module；
The first input end of the first output end connection descending supplementary module of the signal input module, the second output end connect
The input of stable supplementary module is connect, the 3rd output end connects the input of gradient module, and the output end of the gradient module connects
The second input of the descending supplementary module is connect, the output end of the descending supplementary module connects the input of decoupling module,
The interaction end of the interaction end connection decoupling module of the stable supplementary module；
The signal input module is used to obtain vehicle multidate information, and the gradient module is used for according to vehicle dynamic
Information, obtain current hill grade information；The descending supplementary module is used for according to vehicle multidate information and current hill grade information, obtains
Obtain regenerative braking torque Tm, while according to the vehicle multidate information and current hill grade information, under judging whether vehicle meets
Slope subsidiary conditions, and in the first judged result when being, to obtain descending driving torque Ts, the stable supplementary module is used to judge
Whether vehicle is in the hole, and in the second judged result when being, to obtain stabilized driving torque T w, the coupling module is used
According to the first judged result, the second judged result, regenerative braking torque Tm, descending driving torque Ts and stabilized driving moment of torsion
Tw, obtain current driving torque.
Preferably, the vehicle multidate information includes complete vehicle quality, present speed, pedal aperture and accelerator open degree.
It is described dynamic as it is further preferred that the gradient module includes power unit, resistance unit and angle-unit
First input end of the input of power unit as the gradient module, the first input end of output end connection angle unit, resistance
Second input of the input of power unit as the gradient module, the second input of output end connection angle unit, institute
Threeth input of the 3rd input of angle-unit as the gradient module is stated, output end is defeated as the gradient module
Go out end；
The power unit is used to, according to accelerator open degree and pedal aperture, obtain motor driving force FTAnd brake force Fb,
The resistance unit is used to, according to present speed, obtain rolling resistance FfAnd windage Fw, the angle-unit is for according to electricity
Machine driving force FT, brake force Fb, rolling resistance Ff, windage FwAnd complete vehicle quality m, obtain road grade а.
Preferably, the vehicle multidate information include motor speed, battery dump energy, setting speed, current acceleration,
Gear signal, yaw velocity, side slip angle and wheel slip.
Preferably, the descending control system also includes the first driver and the second driver, the decoupling module
Output end connects the first driver, and the output end of the stable supplementary module connects the second driver；
The current driving torque includes the first driving torque T1 and the second driving torque T2, first driver are used
Driven according to the first driving torque T1, second driver is used to be driven according to the second driving torque T2.
According to one side of the present utility model, a kind of gradient module for above-mentioned descending control system is additionally provided,
Including power unit, resistance unit and angle-unit, the first input of the output end connection angle unit of the power unit
End, the second input of the output end connection angle unit of the resistance unit；
The power unit is used to obtain motor driving force FTAnd brake force Fb, the resistance unit is for being rolled
Resistance FfAnd windage Fw, the angle-unit is for according to motor driving force FT, brake force Fb, rolling resistance Ff, windage FwWith
And complete vehicle quality m, obtain road grade а.
According to one side of the present utility model, a kind of electric car for including above-mentioned descending control system is additionally provided.
According to one side of the present utility model, a kind of control method using above-mentioned descending control system is additionally provided,
Comprise the following steps：
S1. signal input module obtains vehicle multidate information, and the vehicle multidate information includes complete vehicle quality, setting speed
Degree, present speed, current acceleration, pedal aperture, accelerator open degree, gear signal, yaw velocity, side slip angle and car
Wheel slip rate；Gradient module obtains road grade а according to vehicle multidate information；
Descending supplementary module is obtained under current vehicle condition, the maximum drive torque Tm of motor；
Stable supplementary module currently whether there is precarious position according to vehicle multidate information, judgement, be to be converted to actively
Braking mode, into step S2, otherwise into step S3；
S2. stablize supplementary module according to vehicle multidate information, stabilized driving torque T w is obtained, if Tw ＜ Tm, make first
Driving torque T1=Tw, the second driving torque T2=0, into step S5, otherwise the first driving torque T1=Tm, the second driving is turned round
Square T2=Tw-Tm, into step S5；
S3. descending supplementary module judges whether to meet descending subsidiary conditions, be then descending supplementary module according to vehicle dynamic
Information and road grade а, descending driving torque Ts is obtained, into step S4；Otherwise return to step S1；
S4. if descending driving torque Ts ＜ Tm, then coupling module obtains the second driving torque T2=0, and the first driving is turned round
Square T1=Ts, the second driving torque T2=Ts-Tm, the first driving torque T1=Tm is otherwise obtained, into step S5；
S5. decoupling module sends the first driving torque signal T1 and the second driving torque signal T2, the first driver root
Driven according to the first driving torque T1, the stable supplementary module exports the second driving torque signal T2, the second driver according to
Second driving torque T2 drives, return to step S1.
Preferably, acquisition road grade а method is specially in the step S1：Opened according to accelerator open degree and pedal
Degree, obtain motor driving force FTAnd brake force Fb, according to present speed, obtain rolling resistance FfAnd windage Fw, according to motor
Driving force FT, brake force Fb, rolling resistance Ff, windage FwAnd complete vehicle quality m, obtain road grade α=arcsin [(ma-FT+
Ff+Fw+Fb)/mg], wherein, g is acceleration of gravity.
Preferably, judge that the current standard with the presence or absence of precarious position is in the step S1：Wheel slip, which exceedes, to be slided
Shifting rate threshold value, yaw velocity exceed angular speed threshold value or side slip angle exceedes side drift angle threshold value.
As it is further preferred that slip rate threshold value is 8%~12%, angular speed threshold value is the degrees second of 80 degrees seconds~110,
Side drift angle threshold value is the degrees second of 8 degrees seconds~14.
Preferably, the standard for judging whether to meet descending subsidiary conditions in the step S3 is：Road grade а is more than the gradient
Threshold xi, setting speed are standard descending speed, and gear signal is D shelves.
As it is further preferred that the standard descending speed is 8km/h~12km/h, the gradient threshold xi is 4 °~
6°。
In general, by the contemplated above technical scheme of the utility model compared with prior art, shown under having
Beneficial effect.
1st, by increasing decoupling module between motor and stable accessory system, according to currently with the presence or absence of precarious position with
And whether meet descending subsidiary conditions, the first driving torque and the second driving torque are distributed, is solved due to descending supplementary module
Presence so that the stabilized driving torque T w that stable supplementary module is sent can not be performed correctly, and then the danger of vehicle unstability occur
Dangerous situation condition, so as to maintain the control stability and vehicle braking safety of vehicle in motor braking；
2nd, gradient module directly can calculate hill gradient using existing signal input module, extra so as to reduce
The input of Slope Transducer or Inertial Measurement Unit, so as to save cost；
3rd, descending supplementary module can be monolithically integrated in entire car controller (VCU) so that descending auxiliary control (HDC) function
As a part for entire car controller (VCU) module, generation cost has been saved.
Brief description of the drawings
Fig. 1 is the utility model descending control system architecture schematic diagram；
Fig. 2 is the utility model gradient modular structure schematic diagram；
Fig. 3 is the descending control system architecture schematic diagram of embodiment 1；
Fig. 4 is the control method schematic diagram of the descending control system of embodiment 1.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not form conflict each other, can is mutually combined.
Descending accessory system (HDC) general principle is as follows：During automobile downhill, by setting desired speed (volume production at present
Vehicle desired speed is arranged on 8~12km/h or so), the active brake when actual vehicle speed exceedes desired speed, tie up speed
Hold in desired vehicle speed range, driver is freed from frequently stepping in brake pedal, so as to improve driving comfort
Property.
The utility model provides a kind of descending control system for electric car, including signal input module, gradient mould
Block, descending supplementary module, stable supplementary module, decoupling module, the first driver and the second driver, as shown in Figure 1；
The first input end of the first output end connection descending supplementary module of the signal input module, the second output end connect
The input of stable supplementary module is connect, the 3rd output end connects the input of gradient module, and the output end of the gradient module connects
The second input of the descending supplementary module is connect, the output end of the descending supplementary module connects the input of decoupling module,
The interaction end of the interaction end connection decoupling module of the stable supplementary module, the driving of output end connection first of the decoupling module
Device, the output end of the stable supplementary module connect the second driver；Wherein, the first driver is the motor of electric car,
The micropump that the electronic stability controlling system that second driver is usually carries；
Wherein, gradient module directly can calculate current hill grade information using Slope Transducer or Inertial Measurement Unit, but
It can be made up of power unit, resistance unit and angle-unit, directly be calculated and worked as using the output signal of signal input module
Preceding grade information, the first input end of the input of the power unit as the gradient module, output end connection angle list
The first input end of member, the second input of the input of resistance unit as the gradient module, output end connection angle list
Second input of member, the 3rd input of the 3rd input of the angle-unit as the gradient module, output end are made
For the output end of the gradient module.
The control principle of above-mentioned descending control system is as follows：
S1. signal input module obtains vehicle multidate information, and the vehicle multidate information includes motor speed, remaining battery
Electricity, complete vehicle quality, setting speed, present speed, current acceleration, pedal aperture, accelerator open degree, gear signal, yaw angle
Speed, side slip angle and wheel slip；
Power unit obtains motor driving force F according to accelerator open degree and pedal aperture, resistance unitTAnd brake force Fb,
According to present speed, rolling resistance F is obtainedfAnd windage Fw, angle-unit is according to motor driving force FT, brake force Fb, roll resistance
Power Ff, windage FwAnd complete vehicle quality m, obtain road grade α=arcsin [(ma-FT+Ff+Fw+Fb)/mg], wherein, g attaches most importance to
Power acceleration；Final roll attitude module obtains road grade а；
Descending supplementary module obtains maximum drive and turned round according to motor speed, battery dump energy and motor charge efficiency
Square Tm；
Stable supplementary module according to vehicle multidate information (such as wheel slip whether exceed slip rate threshold value 8%~
12%th, whether yaw velocity exceedes the degrees second of the degrees second of angular speed threshold value 80~110 or whether side slip angle exceedes side drift angle
The degrees second of the degrees second of threshold value 8~14), judgement currently whether there is precarious position, be to be converted to active brake pattern, into step
S2, otherwise into step S3；
S2. stablize supplementary module according to vehicle multidate information, stabilized driving torque T w is obtained, if Tw ＜ Tm, make first
Driving torque T1=Tw, the second driving torque T2=0, into step S5, otherwise the first driving torque T1=Tm, the second driving is turned round
Square T2=Tw-Tm, into step S5；
S3. descending supplementary module according to vehicle multidate information (whether such as road grade а is more than 4 °~6 ° of gradient threshold xi, if
Whether constant speed degree is standard descending speed 8km/h~12km/h, and whether gear signal is D shelves) judge whether to meet that descending aids in
Condition, it is that then descending supplementary module according to vehicle multidate information and road grade а, obtains descending driving torque Ts, into step
Rapid S4；Otherwise return to step S1；
S4. if descending driving torque Ts ＜ Tm, then coupling module obtains the second driving torque T2=0, and the first driving is turned round
Square T1=Ts, the second driving torque T2=Ts-Tm, the first driving torque T1=Tm is otherwise obtained, into step S5；
S5. decoupling module sends the first driving torque signal T1 and the second driving torque signal T2, the first driver root
Driven according to the first driving torque T1, the stable supplementary module exports the second driving torque signal T2, the second driver according to
Second driving torque T2 drives, return to step S1.
Embodiment 1
The descending accessory system of embodiment 1 is as shown in figure 3, including signal input module, be integrated in entire car controller
Descending auxiliary control system module, executing agency, the executing agency include electronic stability controlling system, decoupling module and
Motor；
Signal input module main function is as follows：According to the signal of change road grade of collection.Wherein, descending auxiliary control
System (HDC) switching cycle, for opening descending miscellaneous function；Grade information and gear signal are used as descending accessory system
Function enables Rule of judgment；Speed, acceleration, accelerator open degree and brake pedal aperture are used to calculate road grade；Battery management
System module sends battery dump energy (SOC) information, for calculating the regenerative braking torque Tmotor of motor；Slip rate, matter
The activation condition of heart side drift angle, yaw velocity information as electronic stability controlling system.
Descending auxiliary control system module is used for according to signal input module information, calculate desired braking torque Treq with
And the regenerative braking torque Tmotor that motor can be provided under current vehicle speed, meanwhile, when Treq is more than Tmotor, obtain electronics
The braking torque Tesp=Treq-Tmotor provided needed for stabilitrak, above-mentioned torque command are sent out by CAN
Give motor and electronic stability controlling system.
After executing agency completes braking by the torque command received, wherein electronic stability controlling system can gather currently
Running status (slip rate, barycenter lateral deviation, yaw velocity) information of vehicle, and analyze whether vehicle meets active brake condition
(unsafe conditions such as above-mentioned unstability or wheel lock up whether occur), it is to switch to active brake pattern.
The electronic stability system active brake condition is according to slip rate, barycenter lateral deviation, yaw velocity information meter
The braking torque Tesp ' needed for holding intact stability is calculated, and this order is sent to decoupling module.Decoupling module according to work as
Preceding regenerative braking torque Tmotor sizes, required braking torque Tesp ', obtain actual braking torque.Mould is decoupled during this
Block instruction is prior to descending auxiliary control system module instruction.Decoupling module computational algorithm is as follows：It is as electronic stability controls
The braking torque Tesp ' that system (ESP) active activation (switching to active brake pattern) exports afterwards, if driving moment locking,
Tesp ' is equal to 0, and decoupling module, which just directly performs, cancels braking torque instruction, i.e. decoupling module sends 0 moment of torsion to motor and referred to
Order, motor should just cancel braking torque at once；If Tesp '>Tmotor>Tmotor1；The actual braking torque of current motor
Tmotor1 (being less than or equal to Tmotor) is it is necessary to increasing the braking torque of motor to Tmotor, remaining braking torque Tesp1-
Tmotor feeds back to ESP by decoupling module, and ESP is carried out this torque command.If Tmotor>Tesp1>Tmotor1, solution
Coupling module is sent to motor increases moment of torsion to Tesp1, and 0 torque command is sent to ESP；If Tmotor1>Tesp1>0, decoupling module
Sent to motor and be equal to Tesp1 torque commands, send 0 torque command to ESP, as shown in Figure 4.
After vehicle starts, according to longitudinal direction of car kinetic theory knowledge, longitudinal stress of the vehicle on parallel to road is public
Formula is as follows：
Ma=FT+mg·sinα-Ff-Fw-Fb (1)
In formula (1)：Items are followed successively by motor driving force F on the right of equationT, vehicle weight along road surface in longitudinal component mg
Sin а, rolling resistance Ff, windage Fw, brake force Fb.Wherein motor driving force FT, brake force FbIt can be stepped on according to accelerator open degree, braking
Plate aperture is calculated in real time；Rolling resistance FfAnd windage FwIt is the function on present speed, can also obtains；And current speed
Degree, acceleration are all that entire car controller provides in real time, therefore road grade α is equal to
α=arcsin [(ma-FT+Ff+Fw+Fb)/mg] (2)
, can be real according to accelerator opening amount signal, GES, brake pedal opening amount signal, gear signal etc. by algorithm above
When calculate the gradient of current road.Eliminate and utilize Inertial Measurement Unit detection road grade.
After vehicle launch, road grade measurement module calculates road grade automatically according to foregoing computational algorithm, works as driving
Member is after starting descending accessory system under adaptive cruise manipulates interface and setting corresponding desired speed, descending accessory system work(
Energy module judges whether to meet descending accessory system condition according to the information of collection, is unsatisfactory for, prompts driver；Meet to start
After condition (gradient is more than threshold value, desired speed is arranged on reasonable interval, gear in D shelves), road grade and request are calculated in real time
Braking torque Treq, tabled look-up according to speed draw motor provide regenerative braking torque Tmotor.Work as Treq<During Tmotor,
Vehicle deceleration is all realized using motor braking power；Such as Treq>Tmotor, preferentially using motor braking, remaining braking torque
There is provided by electronic stability controlling system (ESP).In braking procedure, electronic stability controlling system can detect vehicle in real time and move
State information (wheel slip, side slip angle, yaw velocity), if not being in the presence of wheel lock up or vehicle unstability,
This time flow terminates；It is steady if there is wheel lock up, vehicle unstable phenomenon, electronic stability controlling system active activation, electronics
The torque command of calculating is transferred to decoupling module decoupling by qualitative control system, and final braking torque point is made by decoupling module
Match somebody with somebody.
Technical application of the present utility model is new to have excellent effect as follows：
(1) the descending miscellaneous function system driving model independent as one is incorporated into entire car controller, without list
Only HDC control units, it is cost-effective.
(2) manually opened descending auxiliary function buttons：Cruised in automotive self-adaptive under (ACC) function interface, open descending
Miscellaneous function simultaneously sets desired descending speed, and desired descending speed is a value range, is limited by gradient size.This
Functional switch design is cruised under (ACC) function button in original automotive self-adaptive, is pressed without adding descending auxiliary (HDC) switch
Button, without changing interior structure.
(3) once entire car controller (VCU) receive descending auxiliary (HDC) function open command after, according to grade signal,
Gear signal, battery SOC, complete vehicle fault information etc., judge whether vehicle meets the condition for entering descending auxiliary control model.Sentence
Broken strip part is as follows：(Rule of judgment is as follows：Road slope value is more than threshold value 5, automobile gear level signal is D shelves, desired speed is set in
In the range of corresponding gradient computation of table lookup, while satisfaction can.) it is that descending accessory system (HDC) function enables self-test；
(4) after completing descending auxiliary (HDC) System self-test, in vehicle traveling, when speed exceedes desired speed, meter
In the gradient α generations of calculation, are returned in formula (1), and because driver eliminates brake operating, now brake pedal aperture is now zero, formula (1)
Middle brake force is also zero, and to the state of remaining a constant speed (acceleration is equal to 0), then brake force should press column count formula and calculate, meter
It is as follows to calculate formula
Fb=FT+mg·sinα-Ff-Fw (3)
The braking torque Treq then now asked is equal to brake force FbIt is multiplied by vehicle wheel roll radius.
(5) descending auxiliary control system module goes out electricity according to motor speed, battery SOC, the real-time computation of table lookup of speed information
The regenerative braking torque Tmotor that machine can be provided, works as Treq<During Tmotor, all realize that vehicle subtracts using motor braking power
Speed；Such as Treq>Tmotor, preferentially using motor braking, remaining braking torque is from descending accessory system (HDC) to electronic stability
Property control system (ESP) send and increase torque command, electronic stability controlling system is until speed is stable in desired speed.
(it is one group of speed --- the regenerative braking torque corresponding to moment of torsion calibrated according to vehicle performance, motor performance etc. to table look-up
Tmotor, i.e. speed correspond with motor braking moment of torsion.)
(6) because motor braking and ESP brakings have coupled relation, brake force decoupling module is established therebetween.It is main
Reason is wanted to be (referring to prior art shortcoming first), in vehicle braking procedure, it is possible to occur that wheel lock up, vehicle lose
Steady potential danger may.The criterion of the present embodiment is：When the wheel slip that electronic stability controlling system collects
When exceeding the degrees second of threshold value 100, side slip angle more than threshold value 10%, yaw velocity and exceeding 12 degrees second of threshold value, now electronics
Stabilitrak (ESP) just should be intervened actively, and after electronic stability system active activation, electronic stability system is sent out
The torque command gone out is sent to decoupling module.
Decoupling module computational algorithm is as follows：Torque command after ESP active activations to driving wheel is Tesp1, if driving
Wheel lock up, Tesp1 are equal to 0, and decoupling module, which just directly performs, cancels braking torque instruction, i.e. decoupling module is sent to motor
0 torque command, motor should just cancel braking torque at once；If Tesp1>Tmotor>Tmotor1；The reality of current motor
Braking torque Tmotor1 (being less than or equal to Tmotor, be last moment motor braking moment of torsion, collect in real time) is it is necessary to increasing
The braking torque of motor is added to feed back to ESP by decoupling module to Tmotor, remaining braking torque Tesp1-Tmotor, ESP is just
Perform this torque command.If Tmotor>Tesp1>Tmotor1, decoupling module is sent to motor increases moment of torsion to Tesp1, to
ESP sends 0 torque command；If Tmotor1>Tesp1>0, decoupling module is sent to motor is equal to Tesp1 torque commands, to
ESP sends 0 torque command.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
To limit the utility model, any modification of all made within spirit of the present utility model and principle, equivalent substitution and change
Enter, should be included within the scope of protection of the utility model.
Claims (5)
1. a kind of descending control system, it is characterised in that including signal input module, gradient module, descending supplementary module, stably
Supplementary module and decoupling module；
The first input end of the first output end connection descending supplementary module of the signal input module, the connection of the second output end are steady
Determine the input of supplementary module, the 3rd output end connects the input of gradient module, the output end connection institute of the gradient module
The second input of descending supplementary module is stated, the input of the output end connection decoupling module of the descending supplementary module is described
The interaction end of the interaction end connection decoupling module of stable supplementary module.
2. descending control system as claimed in claim 1, it is characterised in that the gradient module includes power unit, resistance
Unit and angle-unit, the first input end of the input of the power unit as the gradient module, output end connection
The first input end of angle-unit, the second input of the input of resistance unit as the gradient module, output end connection
Second input of angle-unit, the 3rd input of the 3rd input of the angle-unit as the gradient module are defeated
Go out output end of the end as the gradient module.
3. descending control system as claimed in claim 1 or 2, it is characterised in that the descending control system also includes first
Driver and the second driver, the output end of the decoupling module connects the first driver, described to stablize the defeated of supplementary module
Go out the second driver of end connection.
A kind of 4. gradient module for being used for the descending control system as described in any one in claim 1-3, it is characterised in that bag
Include power unit, resistance unit and angle-unit, the first input end of the output end connection angle unit of the power unit,
Second input of the output end connection angle unit of the resistance unit.
A kind of 5. electric car for including the descending control system as described in any one in claim 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720355777.9U CN207000221U (en) | 2017-04-07 | 2017-04-07 | A kind of descending control system, gradient module and electric car |
Applications Claiming Priority (1)
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| CN111038275A (en) * | 2018-10-11 | 2020-04-21 | 郑州宇通客车股份有限公司 | Control method and device for limiting overspeed of pure electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111038275A (en) * | 2018-10-11 | 2020-04-21 | 郑州宇通客车股份有限公司 | Control method and device for limiting overspeed of pure electric vehicle |
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