CN108730398A - A kind of adjustable air spring of Inside Air Temperature and its control method - Google Patents
A kind of adjustable air spring of Inside Air Temperature and its control method Download PDFInfo
- Publication number
- CN108730398A CN108730398A CN201810711190.6A CN201810711190A CN108730398A CN 108730398 A CN108730398 A CN 108730398A CN 201810711190 A CN201810711190 A CN 201810711190A CN 108730398 A CN108730398 A CN 108730398A
- Authority
- CN
- China
- Prior art keywords
- air spring
- air
- space
- pressure
- tables
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
- F16F9/5123—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity responsive to the static or steady-state load on the damper
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The present invention discloses a kind of adjustable air spring of Inside Air Temperature and its control method, including upper end cover, flexible air bag, buffer, lower platen and pedestal；The upper end Curl Compression of flexible air bag is fixed in the curl space of upper end cover bottom, gas-tight seal between formation upper end cover and flexible air bag, and the lower end of flexible air bag is pressed down the convex surface of plate and the concave surface extruding fixation of pedestal upper end；Buffer is installed on inside flexible air bag；Pedestal is in integrally annular shape, is equipped with external annulus and internal ring wall successively from outside to inside.Air spring has the ability heated to its inner air in the present invention, is effectively improved comprehensive performance of the vehicle under different operating modes, the circuit in control method is simple, and control algolithm is easy to implement, good reliability, of low cost.
Description
Technical field
The invention belongs to vehicle suspension technologies, and in particular to a kind of adjustable air spring of Inside Air Temperature and its control
Method.
Background technology
Since the general travel of vehicle is not absolutely flat, wheel is rushed by the vertical reaction from road surface
Hit, it is this impact on vehicle personnel and article can all cause certain adverse effect.In order to reduce this adverse effect, vapour
Suspension is developed and has been applied on vehicle.Air suspension be one kind using air spring as elastic element, have structure
Simply, the features such as non-linear strong.Air spring is key components in airsuspension system, because the performance of air spring exists
It has been largely fixed the performance of air suspension.Air spring is a kind of rubber or the air bag of cord structure, utilizes air
Compressibility realize similar to spring effect.
Air suspension, medium-sized and heavy goods vehicle are almost assembled on the bullet train of developed country and luxurious city bus
And the installation rate of trailer has also exceeded 80%.The top-of-the-range version of the brands such as limousine such as Lincoln, benz is fitted with performance
Good shock insulation air spring.Traditional air suspension is adjusted air spring inner air amount using air compressor,
To change the rigidity of air spring.But the cost of the air spring air-charging and air-discharging system with air compressor is costly, accounts for
Larger with chassis space, charge and discharge solid/liquid/gas reactions are slow and service life is shorter, and maintenance cost is high.
Optimization problem is that optimal case or ginseng are found in numerous schemes or parameter value in the case where meeting certain condition
Numerical value, so that some or multiple functional parameters are optimal.Vehicle is when driving, flat to the traveling of vehicle when road conditions difference
Pliable and riding stability and safety have different requirements.Therefore, air suspension needs to carry out with the variation of body gesture
Certain stiffness variation, to adapt to requirement of the vehicle to ride performance and safety under the road conditions.Particle cluster algorithm asks excellent
Technology be it is a kind of efficiently, practical, strong robustness parallel, efficient full search algorithm, can effectively solve NP (Non-
Deterministic Polynomial) problem and non-linear, Multiple hump function optimization and multi-objective optimization question, have and obtains
The ability of global optimum and Fast Convergent is very suitable for the non-of the adjustable air spring suspension Vehicular system of Inside Air Temperature
Linear model.
There is presently no related arts to adjust air bullet by actively adjusting air spring Inside Air Temperature
Spring rigidity.
Invention content
Goal of the invention：It is an object of the invention to solve the deficiencies in the prior art, a kind of inner air temperature is provided
Spend adjustable air spring and its control method.
Technical solution：A kind of adjustable air spring of Inside Air Temperature of the present invention, including upper end cover, flexible air
Capsule, buffer, lower platen and pedestal；The upper end Curl Compression of the flexibility air bag is fixed on the curl space of upper end cover bottom
Interior, gas-tight seal between formation upper end cover and flexible air bag, the lower end of flexible air bag is pressed down convex surface and the pedestal of plate
The concave surface of upper end, which squeezes, to be fixed；The buffer is installed on the top of lower platen；The pedestal is in integrally annular shape, from outside to inside
It is equipped with external annulus and internal ring wall successively；Space between the upper end cover, flexible air bag, buffer and lower platen is first empty
Between；Space between external annulus and internal ring wall is second space；The inner space of internal ring wall is third space；The lower platen with
Pedestal upper end is all provided with that there are four shape is identical, direction is identical and position is longitudinally-aligned longitudinal venthole, the longitudinal direction ventholes
It is connected to the first space and second space；The horizontal communication hole there are four equidistantly distributed, the horizontal communication hole are set on internal ring wall
It is connected to second space and third space；Bottom in second space is equidistantly fixed with several four air heaters；First is empty
Between, in second space and third space all filled with pressure-air；Heater connects external power supply by electric wire.
The quantity of above-mentioned air heater can be less or greater than 4, such as 4 heaters of spaced set can be into
Row multi gear position is heated, and it is also more convenient to install positioning.
Above-mentioned longitudinal vent holes and horizontal communication hole are by three space unicom, to make full use of the bottom of air spring
Seat space reduces the volume in the first space, and then reduces air spring entirety occupied space, and heating can be installed in second space
Device avoids and puts it into the first spatial band and carry out insecurity.Briefly, second space and third space collective effect can
Reduce the first space size.
The invention also discloses a kind of control methods of the adjustable air spring of Inside Air Temperature, include the following steps：
(1) Inside Air Temperature adjustable air spring physical property is measured.Use air spring static and dynamic characteristics experimental rig
Air spring physical property is measured, and draws the height-pressure-rigidity table of comparisons, is i.e. H-P-k tables, load-pressure-height control
Table, i.e. F-P-H tables, the height-pressure-volume table of comparisons, i.e. H-P-V tables.
List data acquisition methods：Air spring is fixed to height H by air spring static and dynamic characteristics experimental rig, is connected
Heating system is gradually heated up air spring inner air, boosts to air spring normal work upper limit value Pmax, in the process
It records F, P, V value and corresponding rigidity value k is obtained by rigidity test；By gradually changing H values from small to large, and repeatedly
It carries out above step and obtains multigroup H, P, F, V, k value value, and these data are inserted into H-P-k tables, F-P-H tables and H-P-V tables.This
A little list datas are all written as C language write-in ECU and are inquired for control system.
(2) utilize vehicular speeds sensor, range sensor, temperature sensor, pressure transducer, pressure sensor real-time
Detect Vehicle Speed v, air spring height H, air spring internal and external temperature TiAnd To, air spring outside air pressure
PiAnd Po, load F suffered by air spring.According to the speed limit requirement of China's different brackets road, can be pushed away by Vehicle Speed
The grade of disconnected vehicle institute track：0~15km/h is E grades of road surfaces；15~30km/h is D grades of road surfaces；30~60km/h is C grades
Road surface；60~100km/h is B grades of road surfaces；100km/h or more is A grades of road surfaces.
(3) suspension property optimisation strategy：Vehicle suspension is built under Matlab/Simulink environment with computer first
System dynamics simulation model, and be C language by the model conversation.Write particle cluster algorithm C programmer.The particle cluster algorithm
It is embedded with aforementioned Matlab/Simulink simulation models program in program, and becomes using air spring equivalent stiffness k as design
Amount, with pilot set and root-mean-square value R of the vehicle body junction in time interval Δ tACCIt is minimised as optimization aim；With outstanding
Frame suspension dynamic deflection root mean square Rsws, tyre dynamic load lotus root mean square RDL, pitch angle acceleration-root-mean square Rphi, roll angle acceleration it is equal
Root RzetaIt is constraints in safe range, these safe rangies may be due to the difference that vehicle safety requires
Different and air spring inner air pressure has to be larger than environmental stress Pa, it is less than maximum security clearance pressure Pmax.When operation,
Gained vehicle running surface grade, Vehicle Speed and sprung mass value in (2) are inputed to Matlab/ by particle cluster algorithm
The C programmer of Simulink models.Pass through the global optimum's target gas spring mostly obtained for the iterative calculation of design variable
Rigidity value ke, air spring inner air target, pressure Pe is then inquired according to the H-P-k tables, the F-P-H tables that are obtained in (1)
(when there is no same stiffness value in table using table in immediate rigidity value table look-up).
(4) air spring inner air target, pressure Pe and air spring inner air current pressure are found after ECU is calculated
The difference of Ps is more than preset threshold pressure difference Δ Pc, then basisThe mesh reached needed for heating system is calculated
Mark, that is, make air spring Inside Air Temperature reach target temperature Te and start heating system, and by TeAs heating system
Target.
FormulaIn Ps, Current Temperatures TsIt can directly be measured according to step (2), it is empty inside air spring
Between current volume VsIt can be found according to the H-P-V tables obtained in step (1), VeCan according to the suspension load F that step (2) measure,
The F-P-H tables and H-P-V tables that the air spring inner air target, pressure Pe and step (1) that step (3) optimization obtains are obtained
It finds.
(5) ECU by control the break-make of relay switch control heating system whether open, the heater quantity connected with
And heating time；Fourth gear can be divided into according to the difference of the connection quantity n of heater, respectively：I gears, that is, n=1, II grades i.e. n=
2, III grades i.e. n=3, IV grades i.e. n=4；Each gear corresponds to a temperature gap range respectively, respectively：(ΔTmin< Δs T
≤ΔT1、ΔT1< Δs T≤Δ T2、ΔT2< Δs T≤Δ T3、ΔT3< Δs T≤Δ T4With Δ T > Δs T4)；
Current Temperatures TsWith target temperature TeDifference DELTA T when being in the difference range of a certain set gear, ECU controls
The corresponding heater quantity n of the gear is connected, until temperature and the difference of target temperature are less than Δ T after adjustingmin；
(6) above-mentioned control program is all embedded in ECU hardware, then passes through the inner air described in step (1) to (7)
The control method of temperature adjustable air spring makes spring rate adjust to the state most beneficial for vehicle riding comfort.
Advantageous effect：Compared with prior art, the present invention has the following advantages：
(1) bottom that can install four heaters is used on the adjustable air spring constructions of Inside Air Temperature of the invention
Seat makes the air spring have the ability heated to its inner air, is effectively improved vehicle under different operating modes
Comprehensive performance；
(2) circuit in control method of the invention is simple, and control algolithm is easy to implement, good reliability, of low cost；
(3) it is a kind of efficient, practical, robustness that particle cluster algorithm used by the control method in the present invention, which seeks excellent technology,
Strong parallel, efficient full search algorithm, can effectively solve NP (Non-deterministic Polynomial)
Problem and non-linear, Multiple hump function optimization and multi-objective optimization question have the energy for obtaining global optimum and Fast Convergent
Power is very suitable for the nonlinear model of the adjustable air spring suspension Vehicular system of Inside Air Temperature.
Description of the drawings
Fig. 1 is the adjustable air spring two dimension partial sectional view of Inside Air Temperature of the present invention；
Fig. 2 is the adjustable air spring three-dimensional partial sectional view of Inside Air Temperature of the present invention；
Fig. 3 is the circuit diagram of the adjustable air spring of Inside Air Temperature of the present invention；
Fig. 4 is the control flow chart of the adjustable air spring of Inside Air Temperature of the present invention.
Fig. 5 is that the Inside Air Temperature adjustable air spring suspension of the present invention is imitated with the riding comfort of conventional springs suspension
True comparison diagram.
Specific implementation mode
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
As depicted in figs. 1 and 2, the adjustable air spring 20 of a kind of Inside Air Temperature of the invention, including upper end cover 01,
Flexible air bag 02, buffer 05, lower platen 07 and pedestal 21；The upper end Curl Compression of flexible air bag 02 is fixed on upper end cover
It is gas-tight seal between formation upper end cover 01 and flexible air bag 02 in the curl space of 01 bottom, under flexible air bag 02
The concave surface on the convex surface and 21 upper end of pedestal that end is pressed down plate 07, which squeezes, to be fixed；Buffer 05 is installed on the top of lower platen 07；Bottom
Seat 21 is whole in annular shape, is equipped with external annulus 08 and internal ring wall 12 successively from outside to inside；Upper end cover 01, delays flexible air bag 02
It is the first space 04 to rush the space between device 05 and lower platen 07；Space between external annulus 08 and internal ring wall 12 is second space
09；The inner space of internal ring wall 12 is third space 13；Identical, direction phase that there are four shapes lower platen 07 and 21 upper end of pedestal
Same and longitudinally-aligned position longitudinal venthole 06, longitudinal venthole 06 are connected to the first space 04 and second space 09；Internal ring wall
There are four the horizontal communication holes 11 of equidistantly distributed, horizontal communication hole 11 to be connected to second space 09 and third space 13 on 12；The
Equidistantly there are four air heaters 10 for fixation for bottom in two spaces 09；First space 04, second space 09 and third space
13 all filled with pressure-air 03, and heater connects external power supply (not shown) by electric wire 14.
As shown in Figure 3 and Figure 4, the invention also discloses a kind of controlling parties of the adjustable air spring of Inside Air Temperature
Method includes the following steps：
(1) Inside Air Temperature adjustable air spring physical property is measured.Use air spring static and dynamic characteristics experimental rig
Air spring physical property is measured, and draws the height-pressure-rigidity table of comparisons, is i.e. H-P-k tables, load-pressure-height control
Table, i.e. F-P-H tables, the height-pressure-volume table of comparisons, i.e. H-P-V tables.
List data acquisition methods：Air spring static and dynamic characteristics experimental rig is fixed to height H to air spring, connects
Heating system is gradually heated up air spring inner air, boosts to air spring normal work upper limit value Pmax, in the process
It records F, P, V value and rigidity value k at this time is obtained by rigidity test.By gradually changing H values from small to large, counted
Group H, P, F, V value, and these data are inserted into H-P-k tables, F-P-H tables and H-P-V tables.These list datas are all written as C languages
Speech write-in ECU is inquired for control system.
(2) utilize vehicular speeds sensor, range sensor, temperature sensor, pressure transducer, pressure sensor real-time
Detect Vehicle Speed ν, air spring height H, air spring internal and external temperature TiAnd To, air spring outside air pressure
PiAnd Po, load F suffered by air spring.According to the speed limit requirement of China's different brackets road, can be pushed away by Vehicle Speed
The grade of disconnected vehicle institute track：0~15km/h is E grades of road surfaces；15~30km/h is D grades of road surfaces；30~60km/h is C grades
Road surface；60~100km/h is B grades of road surfaces；100km/h or more is A grades of road surfaces.
(3) suspension property optimisation strategy：Vehicle suspension is built under Matlab/Simulink environment with computer first
System dynamics simulation model, and be C language by the model conversation.Write particle cluster algorithm C programmer.The particle cluster algorithm
It is embedded with aforementioned Matlab/Simulink simulation models program in program, and becomes using air spring equivalent stiffness k as design
Amount, with pilot set and root-mean-square value R of the vehicle body junction in time interval Δ tACCIt is minimised as optimization aim；With outstanding
Frame suspension dynamic deflection root mean square Rsws, tyre dynamic load lotus root mean square RDL, pitch angle acceleration-root-mean square Rphi, roll angle acceleration it is equal
Root RzetaIt is constraints in safe range, these safe rangies may be due to the difference that vehicle safety requires
Different and air spring inner air pressure has to be larger than environmental stress Pa, it is less than maximum security clearance pressure Pmax.When operation,
Gained vehicle running surface grade, Vehicle Speed and sprung mass value in (2) are inputed to Matlab/ by particle cluster algorithm
The C programmer of Simulink models.Pass through the global optimum's target gas spring mostly obtained for the iterative calculation of design variable
Rigidity value ke, air spring inner air target, pressure Pe is then inquired according to the H-P-k tables, the F-P-H tables that are obtained in (1)
(when there is no same stiffness value in table using table in immediate rigidity value table look-up).
(4) air spring inner air target, pressure Pe and air spring inner air current pressure are found after ECU is calculated
The difference of Ps is more than preset threshold pressure difference Δ Pc, then basisThe mesh reached needed for heating system is calculated
Mark, that is, make air spring Inside Air Temperature reach target temperature Te and start heating system, and by TeAs heating system
Target.
FormulaIn air spring inner air current pressure Ps, Current Temperatures TsIt can be according to step
(2) it directly measures, air spring inner space current volume VsIt can be found according to the H-P-V tables obtained in step (1), VeIt can be with
The air spring inner air target, pressure Pe and step that the suspension load F that is measured according to step (2), step (3) optimization obtain
(1) the F-P-H tables and H-P-V tables obtained is found.
(5) ECU by control the break-make of relay switch control heating system whether open, the heater quantity connected with
And heating time；Fourth gear can be divided into according to the difference of the connection quantity n of heater, respectively：I gears, that is, n=1, II grades i.e. n=
2, III grades i.e. n=3, IV grades i.e. n=4；Each gear corresponds to a temperature gap range respectively, respectively：(ΔTmin< Δs T
≤ΔT1、ΔT1< Δs T≤Δ T2、ΔT2< Δs T≤Δ T3、ΔT3< Δs T≤Δ T4With Δ T > Δs T4)；
Current Temperatures TsWith target temperature TeDifference DELTA T when being in the difference range of a certain set gear, ECU controls
The corresponding heater quantity n of the gear is connected, until temperature and the difference of target temperature are less than Δ T after adjustingmin；
(6) above-mentioned control program is all embedded in ECU hardware.Pass through above-mentioned Inside Air Temperature adjustable air spring
Control method can make spring rate adjust to most beneficial for vehicle riding comfort state.
Embodiment：
By taking the vehicle degree of freedom suspension of certain car as an example.The body quality of the suspension is body quality 770kg；Front-wheel
Quality 35kg；Trailing wheel quality 30kg；The equivalent stiffness of forward and backward tire is 138000N/m；The damping of front suspension is 1570N/ (m/
s)；The damping of rear suspension is 1760N/ (m/s)；The rotary inertia of car left and right directions is 235kgm2；Rotation in the front-back direction
Inertia is 830kgm2；Distance of the front axle apart from barycenter is 0.958m；Distance of the rear axle apart from barycenter is 1.377m；Automobile is left
Right both sides are symmetrical, apart from barycenter 0.68m；In particle cluster algorithm program often for population be 100；It is 4 to optimize dimension；Particle generation
Number is 100.
Speed is kept after ramping up 57.6km/h after vehicle launch, is travelled on C grades of road surfaces, ECU passes through speed at this time
Degree judge its travel on C grades of road surfaces, then by this time travel speed and road surface rank be transported to particle group optimizing program.Population
Optimize program by showing that the particle cluster algorithm program that brings into operation at this time finds out left front suspension, left rear suspension, right front overhang after operation
Frame, right rear suspension air spring target rigidity value only be respectively ke1=8969N/m, ke2=8983N/m, ke3=
1.2376N/m ke4=1.2367N/m.Then it is respectively by tabling look-up and being calculated the internal object temperature of four suspensions
Te1, Te2, Te3, Te4.According to target temperature and respective Current Temperatures Ts1, Ts2, Ts3, Ts4Temperature difference determine in each spring
The heater number of connection is respectively N1、N2、N3、N4And it is respectively turned on heating, the heater of each spring is in the spring inner
Temperature disconnects when reaching target temperature.Thus the stiffness tuning of each air spring can be respectively adjusted to ke1,
ke2, ke3, ke4, improve vehicle riding comfort.
Fig. 5 is traditional suspension and the automotive suspension that is equipped with the adjustable air spring of Inside Air Temperature in the present invention is driven
The person's of sailing seat and vehicle body junction acceleration-root-mean square RACCChange curve comparison diagram.According to the simulation result it is found that ensureing to pacify
Under the premise of full property, relative to traditional suspension, half, which actively can heat air suspension, so that vehicle riding comfort is improved
21.94%.
Claims (3)
1. a kind of adjustable air spring of Inside Air Temperature, it is characterised in that：Including upper end cover, flexible air bag, buffer,
Lower platen and pedestal；The upper end Curl Compression of the flexibility air bag is fixed in the curl space of upper end cover bottom, in formation
Gas-tight seal between end cap and flexible air bag, the lower end of flexible air bag is pressed down the concave surface on the convex surface and pedestal upper end of plate
It squeezes and fixes；The buffer is installed on the top of lower platen；The pedestal is in integrally annular shape, is equipped with successively from outside to inside outer
Ring wall and internal ring wall；
Space between the upper end cover, flexible air bag, buffer and lower platen is the first space；The external annulus of pedestal with it is interior
Space between ring wall is second space；The inner space of the internal ring wall of pedestal is third space；
That the lower platen and pedestal upper end are all provided with that there are four shapes is identical, direction is identical and position is longitudinally-aligned longitudinal ventilates
Hole, the longitudinal direction venthole are connected to the first space and second space；The horizontal communication there are four equidistantly distributed is set on internal ring wall
Hole, the horizontal communication hole connection second space and third space；And in first space, second space and third space filled with
Pressure-air；Bottom in the second space of pedestal is equidistantly fixed with several air heaters；Heater is connected by electric wire
External power supply.
2. the adjustable air spring of Inside Air Temperature according to claim 1, it is characterised in that：The air heater
Quantity be 4.
3. a kind of control method of the adjustable air spring of Inside Air Temperature, it is characterised in that：Include the following steps：
(1) Inside Air Temperature adjustable air spring physical property is measured：It is measured using air spring static and dynamic characteristics experimental rig
Air spring physical property, and draw the height-pressure-rigidity table of comparisons i.e. H-P-k tables, the load-pressure-height table of comparisons i.e. F-
P-H tables, height-pressure-the volume table of comparisons, that is, H-P-V tables；
List data acquisition methods：Air spring is fixed to height H by air spring static and dynamic characteristics experimental rig, connects heating
System is gradually heated up air spring inner air, boosts to air spring normal work upper limit value Pmax, record in the process
Lower F, P, V value simultaneously obtains corresponding rigidity value k by rigidity test；By gradually changing H values from small to large, and it is repeated
Above step obtains multigroup H, P, F, V, k value, and these data are inserted H-P-k tables, F-P-H tables and H-P-V tables；These tables
Data are all written as C language write-in ECU and are inquired for control system；
(2) it is examined in real time using vehicular speeds sensor, range sensor, temperature sensor, pressure transducer and pressure sensor
Survey Vehicle Speed ν, air spring height H, air spring internal and external temperature TiAnd To, air spring outside air pressure Pi
And Po, load F suffered by air spring；
According to the speed limit requirement of China's different brackets road, the grade of vehicle institute track is inferred by Vehicle Speed：0
~15km/h is E grades of road surfaces；15~30km/h is D grades of road surfaces；30~60km/h is C grades of road surfaces；60~100km/h is B grades of roads
Face；100km/h or more is A grades of road surfaces；
(3) suspension property optimisation strategy：Vehicle suspension system is built under Matlab/Simulink environment with computer first
Dynamics Simulation Model, and be C language by the model conversation；Particle cluster algorithm C programmer is write, the particle cluster algorithm program
In be embedded with aforementioned Matlab/Simulink simulation models program, and using air spring equivalent stiffness k as design variable, with
Pilot set and root-mean-square value R of the vehicle body junction in time interval Δ tACCIt is minimised as optimization aim；With suspension suspension
Dynamic deflection root mean square Rsws, tyre dynamic load lotus root mean square RDL, pitch angle acceleration-root-mean square Rphi, roll angle acceleration root mean square
RzetaIt is constraints in safe range, air spring inner air pressure has to be larger than environmental stress Pa, it is less than maximum safety
Permit pressure Pmax；
When operation, particle cluster algorithm is by gained vehicle running surface grade, Vehicle Speed and sprung mass value in step (2)
The C programmer of Matlab/Simulink models is inputed to, then the overall situation by mostly being obtained for the iterative calculation of design variable
Optimal objective air spring rigidity value ke, target, pressure is then inquired according to the H-P-k tables, the F-P-H tables that are obtained in step (1)
P；
(4) find air spring inner air target, pressure Pe and air spring inner air current pressure Ps's after ECU is calculated
Difference is more than preset threshold pressure difference Δ Pc, then basisThe target reached needed for heating system is calculated, that is,
So that air spring Inside Air Temperature is reached target temperature Te and start heating system, and by TeWork mesh as heating system
Mark；
FormulaIn, air spring inner air current pressure Ps, Current Temperatures TsIt is directly measured according to step (2),
Air spring inner space current volume VsIt is found according to the H-P-V tables obtained in step (1), air spring inner space is current
Volume VeThe suspension load F that is measured according to step (2), step (3) optimize obtained air spring inner air target, pressure PeWith
The F-P-H tables and H-P-V tables that step (1) obtains are found；
(5) ECU by control the break-make of relay switch control heating system whether open, the heater quantity connected and plus
The hot time；Fourth gear can be divided into according to the difference of the connection quantity n of heater, respectively：I gear, that is, n=1, II grade i.e. n=2, III
Shelves are n=3, IV grade i.e. n=4；Each gear corresponds to a temperature gap range respectively, respectively：ΔTmin<ΔT≤ΔT1、
ΔT1<ΔT≤ΔT2、ΔT2<ΔT≤ΔT3、ΔT3<ΔT≤ΔT4With Δ T>ΔT4；
Current Temperatures TsWith target temperature TeDifference DELTA T when being in the difference range of a certain set gear, ECU controls are connected
The corresponding heater quantity n of the gear, until temperature and the difference of target temperature are less than Δ T after adjustingmin；
(6) above-mentioned control program is all embedded in ECU hardware；Spring rate is adjusted to most advantageous by step (1) to (7)
In the state of vehicle riding comfort.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711190.6A CN108730398B (en) | 2018-07-03 | 2018-07-03 | Air spring with adjustable internal air temperature and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711190.6A CN108730398B (en) | 2018-07-03 | 2018-07-03 | Air spring with adjustable internal air temperature and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108730398A true CN108730398A (en) | 2018-11-02 |
| CN108730398B CN108730398B (en) | 2020-05-19 |
Family
ID=63925725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810711190.6A Active CN108730398B (en) | 2018-07-03 | 2018-07-03 | Air spring with adjustable internal air temperature and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108730398B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109747367A (en) * | 2019-01-16 | 2019-05-14 | 江苏科技大学 | Vehicle air suspension system and control method towards limit driving cycle |
| CN110901329A (en) * | 2019-11-06 | 2020-03-24 | 江苏科技大学 | Air suspension system for vehicle under emergency running condition and control method |
| RU212212U1 (en) * | 2022-03-28 | 2022-07-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | PNEUMATIC ELASTIC ELEMENT |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263317A (en) * | 2005-07-27 | 2008-09-10 | Bfs多样产品有限责任公司 | Multi-component end member assembly and air spring assembly including the same |
| RU2340468C1 (en) * | 2007-05-14 | 2008-12-10 | Государственное образовательное учреждение высшего профессионального образования Волгоградский государственный технический университет (ВолгГТУ) | Pneumatic suspension |
| CN202301709U (en) * | 2011-10-29 | 2012-07-04 | 郑州宇通客车股份有限公司 | Lower base of air spring and air spring assembly provided with lower base |
| CN103244597A (en) * | 2013-04-28 | 2013-08-14 | 江苏科技大学 | Four-gear air spring with adjustable volume and method for controlling four-gear air spring |
| CN207437658U (en) * | 2017-09-18 | 2018-06-01 | 新昌县林昱机械科技有限公司 | A kind of industrial machinery shock-absorption device |
-
2018
- 2018-07-03 CN CN201810711190.6A patent/CN108730398B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263317A (en) * | 2005-07-27 | 2008-09-10 | Bfs多样产品有限责任公司 | Multi-component end member assembly and air spring assembly including the same |
| RU2340468C1 (en) * | 2007-05-14 | 2008-12-10 | Государственное образовательное учреждение высшего профессионального образования Волгоградский государственный технический университет (ВолгГТУ) | Pneumatic suspension |
| CN202301709U (en) * | 2011-10-29 | 2012-07-04 | 郑州宇通客车股份有限公司 | Lower base of air spring and air spring assembly provided with lower base |
| CN103244597A (en) * | 2013-04-28 | 2013-08-14 | 江苏科技大学 | Four-gear air spring with adjustable volume and method for controlling four-gear air spring |
| CN207437658U (en) * | 2017-09-18 | 2018-06-01 | 新昌县林昱机械科技有限公司 | A kind of industrial machinery shock-absorption device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109747367A (en) * | 2019-01-16 | 2019-05-14 | 江苏科技大学 | Vehicle air suspension system and control method towards limit driving cycle |
| CN109747367B (en) * | 2019-01-16 | 2021-12-07 | 江苏科技大学 | Automobile air suspension system for limit driving working condition and control method |
| CN110901329A (en) * | 2019-11-06 | 2020-03-24 | 江苏科技大学 | Air suspension system for vehicle under emergency running condition and control method |
| RU212212U1 (en) * | 2022-03-28 | 2022-07-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | PNEUMATIC ELASTIC ELEMENT |
| RU2781441C1 (en) * | 2022-05-04 | 2022-10-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный аграрный университет" (ФГБОУ ВО Казанский ГАУ) | Spring with variable rigidity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108730398B (en) | 2020-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| De Novellis et al. | Wheel torque distribution criteria for electric vehicles with torque-vectoring differentials | |
| CN106240629B (en) | Prenex optimization system for vehicle | |
| CN103921786B (en) | A kind of nonlinear model predictive control method of electric vehicle process of regenerative braking | |
| CN103630298B (en) | Car mass and centroid position Dynamic Identification system | |
| CN102729760B (en) | Real-time optimal damping control algorithm of automobile semi-active suspension system | |
| CN107499271A (en) | A kind of car anti-rollover control system and method based on electronic control air suspension and electric controlled brake system | |
| Yu et al. | Optimal design and control of 4-IWD electric vehicles based on a 14-DOF vehicle model | |
| CN106043256A (en) | Electric-hydraulic composite braking system for electric automobile and optimization method of electric-hydraulic composite braking system | |
| CN109703375A (en) | Electric car regenerating braking energy coordinates recycling and control method | |
| CN108730398A (en) | A kind of adjustable air spring of Inside Air Temperature and its control method | |
| CN103942392A (en) | Automotive chassis technical parameter robust design method based on full life circle | |
| CN207190988U (en) | A kind of car anti-rollover system based on electronic control air suspension system | |
| CN110001339A (en) | A kind of suspension semi-active control method for vehicle of blowing out | |
| Zhou et al. | Research on regenerative braking control strategy of hybrid electric vehicle | |
| Gang et al. | Vehicle active front steering and yaw moment integrated control | |
| Xu et al. | Hierarchical control of ride height system for electronically controlled air suspension based on variable structure and fuzzy control theory | |
| Senatore | Prediction of mobility, handling, and tractive efficiency of wheeled off-road vehicles | |
| CN210364101U (en) | Semi-active damping adjustable cab suspension system | |
| Yao et al. | Study on a novel dual-mode interconnected suspension | |
| CN107000529A (en) | For running the method for motor vehicle, the method for compensating vehicle roll and motor vehicle | |
| CN113761658A (en) | Optimized matching method for stiffness damping characteristics of vehicle air suspension | |
| Al-Solihat et al. | Influence of tyre pressure on an urban bus transient and steady state handling performance | |
| Galmarini et al. | A quadricycle for urban mobility | |
| Grzegożek et al. | Wheel torque distribution for narrow cars | |
| CN203623312U (en) | Four-airbag rear-bridge air suspension system for buses |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |