CN105835649B - A kind of hydro pneumatic suspension and its control method with variable volume auxiliary chamber - Google Patents
A kind of hydro pneumatic suspension and its control method with variable volume auxiliary chamber Download PDFInfo
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- CN105835649B CN105835649B CN201610156211.3A CN201610156211A CN105835649B CN 105835649 B CN105835649 B CN 105835649B CN 201610156211 A CN201610156211 A CN 201610156211A CN 105835649 B CN105835649 B CN 105835649B
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- solenoid valve
- auxiliary chamber
- pressure
- resorption
- cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/10—Acceleration; Deceleration
- B60G2400/102—Acceleration; Deceleration vertical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/10—Acceleration; Deceleration
- B60G2400/104—Acceleration; Deceleration lateral or transversal with regard to vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/20—Speed
- B60G2400/204—Vehicle speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/22—Spring constant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention belongs to a kind of hydro pneumatic suspension and its control method with variable volume auxiliary chamber of automotive suspension technical field；Including testing agency, executing agency, auxiliary chamber, additional hydraulic cylinders, hydro pneumatic suspension, fuel tank and electronic control unit, by the detection of the fluid pressure signal to speed, vehicle body normal acceleration, vehicle lateral acceleration, auxiliary chamber cavity of resorption and high pressure oil storage tank, electronic control unit is by controlling executing agency to realize the adjusting of auxiliary chamber hydraulic fluid pressure；Additional hydraulic cylinders utilize energy production high pressure liquid pressure oil during automobile vibration, and to adjust the pressure of nitrogen in auxiliary chamber, so as to adjust the rigidity of hydro pneumatic suspension, additional hydraulic cylinders not only act as the effect of damper, while reduce the waste of the energy；The present invention has wider stiffness tuning scope, simultaneously because throttle orifice has damping action, therefore makes automobile have more preferable ride comfort, is conducive to improve the comfort taken.
Description
Technical field
The invention belongs to automotive suspension apparatus technical field, and in particular to a kind of oil gas with variable volume auxiliary chamber
Suspension and its control method.
Background technology
In recent years, the active hydro pneumatic suspension begun to use on some sedan limousines, active hydro pneumatic suspension are to adjust automatically
The rigidity of suspension spring and the new automobile suspension of height are saved, it has the oil pump that high pressure oil is provided to hydro-pneumatic spring, often
A wheel has the hydro-pneumatic spring that can individually adjust, and is controlled by electronic control system, can improve automobile well
Ride comfort and control stability.At present, hydro pneumatic suspension generally adjusts rigidity, but its using multistage accumulator or additional high-pressure tank
Stiffness tuning is fixed value and adjustable range is smaller.
Auxiliary chamber is generally widely used in air suspension, has the function that to adjust rigidity and damping, variable volume adds gas
The research of room makes the adjustable range of air suspension rigidity broaden, and automobile is preferably adapted to different road excitations, improves
The ride comfort of automobile；A kind of air spring additional air chamber of variable volume of Application No. 201210075510.6, the invention
Auxiliary chamber realizes the change of volume by the reciprocating motion of control piston so that the dischargeable capacity that air spring participates in work changes
Become, so as to change the rigidity of air spring system, to adapt to the various driving cycles of vehicle, it is comprehensive to reach improvement suspension system
The purpose of energy, the piston of the invention must have leakproofness well；A kind of variable capacity of Application No. 201210544878.2
Long-pending air spring additional air chamber, the invention are that central shaft often turns over certain angle by controlling stepper motor to work, and are driven
Different fan-shaped valve blocks closes corresponding fan-shaped pylone, realizes that auxiliary chamber volume quickly changes automatically, obtains air spring
Greater stiffness excursion, but the patent also needs good leakproofness, while stepper motor needs to consume energy.
The content of the invention
Rigidity and damping the purpose of the invention is to realize hydro pneumatic suspension are adjusted, and the one kind provided carries variable capacity
The hydro pneumatic suspension and its control method of product auxiliary chamber, by the damping action of auxiliary chamber adjustable volume and throttle orifice, are realized
The rigidity of hydro pneumatic suspension and damping are adjusted.
The technical scheme is that：A kind of hydro pneumatic suspension with variable volume auxiliary chamber, including testing agency, hold
Row mechanism, auxiliary chamber, additional hydraulic cylinders, high pressure oil storage tank, oil supply system, hydro pneumatic suspension and electronic control unit；
The testing agency includes vehicle speed sensor, body-acceleration sensor, vehicle body lateral acceleration sensor and liquid
Pressure sensor b；The executing agency includes solenoid valve a, solenoid valve c, solenoid valve d and throttle orifice；
The auxiliary chamber is divided for the auxiliary chamber epicoele equipped with high pressure nitrogen and equipped with the attached of high pressure liquid pressure oil by piston a
Aerating room cavity of resorption；The liquid-pressure pick-up b is located at intracavitary under auxiliary chamber；The additional hydraulic cylinders are divided by check valve c
Additional hydraulic cylinders epicoele and additional hydraulic cylinders cavity of resorption；The diameter of additional hydraulic cylinders epicoele is less than additional hydraulic cylinders cavity of resorption；It is described attached
Check valve c is housed between liquid feeding cylinder pressure epicoele and additional hydraulic cylinders cavity of resorption；The additional hydraulic cylinders epicoele by fluid pressure line with
Auxiliary chamber cavity of resorption connects, and additional hydraulic cylinders cavity of resorption is connected by fluid pressure line and high pressure oil storage tank and auxiliary chamber cavity of resorption respectively
It is logical；The solenoid valve a is located on the fluid pressure line between the high pressure oil storage tank and auxiliary chamber cavity of resorption；The solenoid valve c and
Solenoid valve d is sequentially arranged on the fluid pressure line between the additional hydraulic cylinders cavity of resorption and high pressure oil storage tank；The solenoid valve d with it is attached
Fluid pressure line between liquid feeding cylinder pressure cavity of resorption is equipped with check valve b；The high pressure oil storage tank passes through fluid pressure line and oil supply system
Connection；Oil supply system is electrically connected with electronic control unit；
The accumulator epicoele of the hydro pneumatic suspension is connected with auxiliary chamber epicoele by air-pressure duct；The throttle orifice is located at
On air-pressure duct between auxiliary chamber epicoele and accumulator epicoele；
The electronic control unit include input module, computing module, solenoid valve control module, Damper Control module and
Output module forms；The input module is electrically connected and is used for the speed signal for receiving vehicle speed sensor with the testing agency,
The vertical signal for faster of body-acceleration sensor, the transverse acceleration signal and hydraulic pressure of vehicle body lateral acceleration sensor
The fluid pressure signal of sensor b, and computing module is sent to, computing module is according to speed signal, vertical signal for faster and transverse direction
Acceleration signal calculates the rigidity and damping needed for suspension, and the pressure of intracavitary nitrogen on auxiliary chamber is judged according to fluid pressure signal
Whether power meets rigidity requirement, and the result of computing is transmitted to solenoid valve control module and Damper Control module, solenoid valve
Control module and the Damper Control module generate control instruction and control instruction are transmitted to output module respectively, described
Output module is electrically connected with the executing agency, and the instruction that the output module is generated according to solenoid valve control module controls electromagnetism
The switch of valve a, solenoid valve c and solenoid valve d；The instruction that the output module is generated according to Damper Control module controls throttle orifice
Switch.
In such scheme, the oil supply system includes hydraulic pump and fuel tank；The executing agency further includes solenoid valve b；Institute
State testing agency and further include liquid-pressure pick-up a；The electronic control unit further includes hydraulic pump control module；
One end of the hydraulic pump is connected with the high pressure oil storage tank, and the other end is connected with fuel tank；The hydraulic pump and height
The hydraulic pipeline between oil storage tank is pressed to be located at equipped with check valve a, the liquid-pressure pick-up a in high pressure oil storage tank；
The solenoid valve b is located on the fluid pressure line between the high pressure oil storage tank and fuel tank；
The liquid-pressure pick-up a is used for the pressure for detecting hydraulic oil in high pressure oil storage tank；The fluid pressure sensing
Device a is sent to computing module with the input module with being electrically connected and receiving liquid pressure signal, and computing module is according to basis
Fluid pressure signal judges whether the pressure in the high pressure oil storage tank meets the requirements, and the result of computing is transmitted to hydraulic pump
Control module, hydraulic pump control module generation control instruction, and control instruction is transmitted to output module, the output module
According to the switch of instruction control hydraulic pump.
Further, overflow valve is further included；Hydraulic pipeline between one end of the overflow valve and hydraulic pump and check valve a
Connection, the other end are connected with fuel tank.
In such scheme, the solenoid valve a, solenoid valve b and solenoid valve c are 2/2-way solenoid valve.
In such scheme, the solenoid valve d is two-bit triplet solenoid valve.
A kind of control method of the hydro pneumatic suspension with variable volume auxiliary chamber described in basis, comprises the following steps：
S1, the vehicle speed sensor detect the speed signal of vehicle body in real time, and body-acceleration sensor detection automobile hangs down
Straight signal for faster, the transverse acceleration signal of vehicle body lateral acceleration sensor detection automobile, hydraulic pressure sensor b detections are attached
The fluid pressure signal of aerating room cavity of resorption, the input module of the electronic control unit receive the data of detection and are transmitted to computing
Module；
S2, computing module are firm according to needed for speed signal, vertical signal for faster and transverse acceleration signal calculate suspension
Degree and damping, judge whether the pressure of intracavitary nitrogen on auxiliary chamber meets rigidity requirement according to fluid pressure signal, and will fortune
The result of calculation is transmitted to solenoid valve control module and Damper Control module；
S3, when automobile needs less rigidity, Damper Control module generation control instruction, and control instruction is transmitted
To output module, output module control throttle orifice is opened, and auxiliary chamber epicoele is turned on accumulator epicoele, makes gas
Volume becomes larger, and the rigidity of suspension reduces；Simultaneously because in automobile vibration, there is pressure differential between accumulator and auxiliary chamber,
The aperture of electronic control unit control throttle orifice makes to produce suitable damping between auxiliary chamber and accumulator；
S4, when needing to obtain larger rigidity, the instruction control control solenoid valve a of solenoid valve control module generation is powered
Conducting, when solenoid valve c energizations are closed, due to body vibrations, makes piston b move upwards, under high pressure oil storage tank and additional hydraulic cylinders
The oilhole of chamber is closed, and the hydraulic oil of additional hydraulic cylinders cavity of resorption is pressed into additional hydraulic cylinders epicoele；During piston b downlinks, high pressure
Oil storage tank is turned on the oil circuit of additional hydraulic cylinders cavity of resorption, the high-pressure and hydraulic oil stream in high pressure oil storage tank into additional hydraulic cylinders cavity of resorption,
The hydraulic oil of additional hydraulic cylinders cavity of resorption is compensated, the hydraulic oil volume of intracavitary and pressure are consequently increased under auxiliary chamber, add gas
The nitrogen volume reducing of intracavitary, pressure increase, make the rigidity of hydro pneumatic suspension increase on room；
S5, when needing to reduce rigidity, the instruction control solenoid valve a of solenoid valve control module generation is closed, and solenoid valve c is led
Logical, the hydraulic oil of intracavitary can flow to high pressure oil storage tank under auxiliary chamber when solenoid valve d is in left logical, at this time intracavitary under auxiliary chamber
The pressure of hydraulic oil reduces, and the volume increase of intracavitary nitrogen, pressure reduce on auxiliary chamber, and the rigidity of hydro pneumatic suspension reduces.
In such scheme, damping step is further included, the damping step is specially：
In vehicle traveling process, the solenoid valve a, solenoid valve b are initially at closed mode, and solenoid valve c is on shape
State, solenoid valve d are in right logical state；When automobile vibration makes the vehicle body of automobile downward, piston b is moved upwards, additional hydraulic cylinders
Hydraulic oil in cavity of resorption is pressed into additional hydraulic cylinders epicoele, and high pressure oil enters auxiliary chamber cavity of resorption by fluid pressure line；Work as car
When body is upward, piston b is moved downward, and the pressure of additional hydraulic cylinders cavity of resorption reduces, and hydraulic oil returns to attached from additional hydraulic cylinders cavity of resorption
Liquid feeding cylinder pressure epicoele, at this time additional hydraulic cylinders play the role of damper, reduce body vibrations.
In such scheme, fuel feeding step during stiffness tuning is further included；The fuel feeding step is specially：When high pressure oil storage tank
When interior pressure is less than setting value, hydraulic pump control module generation control instruction, and control instruction is transmitted to output module, institute
The output module stated makes the pressure of high pressure oil storage pot liquid reach required value according to instruction control oil supply system work.
In such scheme, oil extraction step during stiffness tuning is further included；The oil extraction step is specially：When high pressure oil storage tank
When the pressure signal of interior liquid-pressure pick-up a is more than setting value, solenoid valve control module generation control instruction, and will control
Instruction is transmitted to output module, when the output module controls the b conductings of control solenoid valve according to instruction, in high pressure oil storage tank
Hydraulic oil flow back into fuel tank.
The beneficial effects of the invention are as follows：Compared with prior art, invention increases an additional hydraulic cylinders, and play
Cushioning effect, improves the damping performance of automobile, is conducive to improve the ride comfort of the comfort taken and automobile；It is attached by increasing
Aerating room and throttle orifice, the rigidity and damp adjustable range for making hydro pneumatic suspension broaden, simultaneously as the volume of auxiliary chamber can
Adjust, make the stiffness tuning scope of hydro pneumatic suspension wider, be conducive to adapt to different road excitations, improve the stability of vehicle body；By
Energy when using body vibrations carries out pressure adjusting, it is not necessary to which extra energy supply, is conducive to the energy saving of automobile, reduces the energy
Waste；Since auxiliary chamber cavity of resorption is hydraulic oil, the upper and lower chamber of auxiliary chamber is set to separate well, it is not necessary to consider
The leakproofness of piston, makes to be simple to manufacture；The electronic control unit realizes on the basis of automotive suspension control unit,
Extra electronic control unit need not be increased, advantageously reduced cost.
Brief description of the drawings
Fig. 1 is the structure diagram of an embodiment of the present invention；
Fig. 2 is the auxiliary chamber and additional hydraulic cylinders structure diagram of an embodiment of the present invention；
Fig. 3 is the electronic control schematic diagram of an embodiment of the present invention；
Fig. 4 is that the hydraulic oil of an embodiment of the present invention circulates route map；
Fig. 5 is running of hydraulic power oil route map during pressure oil into auxiliary chamber of an embodiment of the present invention；
Running of hydraulic power oil route map when Fig. 6 is the auxiliary chamber oil extraction of an embodiment of the present invention.
In figure, 1, electronic control unit；2nd, vehicle speed sensor；3rd, body-acceleration sensor；4th, vehicle body transverse acceleration
Sensor；5th, throttle orifice；6th, hydro pneumatic suspension；601st, accumulator epicoele；602nd, accumulator cavity of resorption；7th, additional hydraulic cylinders；701st, it is living
Fill in push rod；702nd, piston b；703rd, additional hydraulic cylinders cavity of resorption；704th, check valve c；705th, additional hydraulic cylinders epicoele；8th, solenoid valve a；
9th, overflow valve；10th, hydraulic pump；11st, fuel tank；12nd, check valve a；13rd, solenoid valve b；14th, high pressure oil storage tank；15th, fluid pressure passes
Sensor a；16th, check valve b；17th, solenoid valve d；18th, solenoid valve c；19th, liquid-pressure pick-up b；20th, auxiliary chamber；2001st, it is attached
Aerating room epicoele；2002nd, piston a；2003 auxiliary chamber cavity of resorptions.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with the accompanying drawings, but protection scope of the present invention is simultaneously
Not limited to this.
Fig. 1 show a kind of embodiment of the hydro pneumatic suspension of the present invention with variable volume auxiliary chamber, described
Hydro pneumatic suspension with variable volume auxiliary chamber includes testing agency, executing agency, auxiliary chamber 20, additional hydraulic cylinders 7, height
Press oil storage tank 14, oil supply system, hydro pneumatic suspension 6 and electronic control unit 1.
Fig. 2 show auxiliary chamber and additional hydraulic cylinders structure diagram, and the auxiliary chamber 20 is for a2002 points by piston
Auxiliary chamber epicoele 2001 and auxiliary chamber cavity of resorption 2003；High pressure nitrogen is housed, under auxiliary chamber in auxiliary chamber epicoele 2001
Equipped with high-pressure and hydraulic oil in chamber 2003；Liquid-pressure pick-up b19 is equipped with the auxiliary chamber cavity of resorption 2003.
C704 points by check valve of the additional hydraulic cylinders 7 are additional hydraulic cylinders epicoele 705 and additional hydraulic cylinders cavity of resorption 703；
The diameter of additional hydraulic cylinders epicoele 705 is less than additional hydraulic cylinders cavity of resorption 703, additional hydraulic cylinders epicoele 705 is produced high-pressure and hydraulic
Oil；Check valve c704 is housed between the additional hydraulic cylinders epicoele 705 and additional hydraulic cylinders cavity of resorption 703, hydraulic oil is led to
Cross additional hydraulic cylinders cavity of resorption 703 and enter additional hydraulic cylinders epicoele 705, prevent hydraulic oil to be back to additional hydraulic cylinders cavity of resorption 703；Institute
The upper end for stating additional hydraulic cylinders 7 is installed on vehicle body, and the end of piston push rod 701 is installed in vehicle bridge；The additional hydraulic cylinders
Epicoele 705 is connected by fluid pressure line with auxiliary chamber cavity of resorption 2003, additional hydraulic cylinders cavity of resorption 703 respectively by fluid pressure line with
High pressure oil storage tank 14 is connected with auxiliary chamber cavity of resorption 2003.
Fluid pressure line between the high pressure oil storage tank 14 and auxiliary chamber cavity of resorption 2003 is equipped with solenoid valve a8；It is described attached
Solenoid valve c18 and solenoid valve d17 is equipped with fluid pressure line between liquid feeding cylinder pressure cavity of resorption 703 and high pressure oil storage tank 14 successively；Institute
The fluid pressure line stated between solenoid valve d17 and additional hydraulic cylinders cavity of resorption 703 is equipped with check valve b16, and check valve b16 prevents from adding
The hydraulic oil of hydraulic cylinder cavity of resorption 703 enters auxiliary chamber cavity of resorption 2003 by solenoid valve；The high pressure oil storage tank 14 passes through hydraulic pressure
Pipeline is connected with oil supply system.Preferably, the solenoid valve a8 and solenoid valve c18 are 2/2-way solenoid valve；The electromagnetism
Valve d17 is two-bit triplet solenoid valve.The solenoid valve a8 is in normally off, is powered after conducting, the height in high pressure oil storage tank 14
Hydraulic fluid pressure oil is flowed into additional hydraulic cylinders cavity of resorption 703, and the hydraulic oil of additional hydraulic cylinders cavity of resorption 703 passes through check valve during body vibrations
C704 enters additional hydraulic cylinders epicoele 705 and auxiliary chamber cavity of resorption 2003.Solenoid valve c18 is in normally open, is powered after closing,
Hydraulic oil can be stored into additional hydraulic cylinders epicoele 705 and auxiliary chamber cavity of resorption 2003, the hydraulic oil stored with the vibration of vehicle body
Increase, the volume of gas reduces pressure increase in auxiliary chamber epicoele 2001；When solenoid valve d17 is in right logical state, gas is added
The hydraulic oil of room cavity of resorption 2003 flows into additional hydraulic cylinders cavity of resorption 703, auxiliary chamber cavity of resorption when solenoid valve d17 is in left logical state
2003 hydraulic oil flows into high pressure oil storage tank 14.
The oil supply system includes hydraulic pump 10, fuel tank 11 and overflow valve 9；One end of the hydraulic pump 10 and the high pressure
Oil storage tank 14 connects, and the other end is connected with fuel tank 11；Hydraulic pipeline between the hydraulic pump 10 and high pressure oil storage tank 14 is equipped with
Check valve a12, check valve a12 prevent the high-pressure oil flow oil return box 11 in high pressure oil storage tank 14；The fluid pressure senses a15)
It is located in high pressure oil storage tank 14.Fluid pressure line between the high pressure oil storage tank 14 and fuel tank 11 is equipped with the solenoid valve b13,
Preferably, the solenoid valve b13 is 2/2-way solenoid valve.Solenoid valve b13 is in normally off, is powered after conducting, high pressure storage
High-pressure and hydraulic oil stream in oil tank 14 is returned in fuel tank 11.
Hydraulic pipeline connection between one end of the overflow valve 9 and hydraulic pump 10 and check valve a12, the other end and fuel tank
11 connections.When the hydraulic oil between hydraulic pump 10 and check valve a12 is excessive, it is back in fuel tank 11, is played by overflow valve 9
Protective effect to hydraulic pump 10.
The hydro pneumatic suspension 6 includes accumulator, and the accumulator is divided into accumulator epicoele 601 and accumulator cavity of resorption by piston
602；Accumulator epicoele 601 is equipped with high pressure nitrogen, and accumulator cavity of resorption 602 is equipped with high pressure liquid pressure oil.Hydro pneumatic suspension accumulator epicoele
601 are connected by pneumatic circuit with auxiliary chamber epicoele 2001；The throttle orifice 5 is located at auxiliary chamber epicoele 2001 and energy storage
On air-pressure duct between device epicoele 601.On pore size control auxiliary chamber epicoele 2001 and accumulator by adjusting throttle orifice 5
The circulation of gases at high pressure in chamber 601, and play damping action.
Fig. 3 show electronic control schematic diagram, and the testing agency includes vehicle speed sensor 2, body-acceleration sensor
3rd, vehicle body lateral acceleration sensor 4, liquid-pressure pick-up a15 and liquid-pressure pick-up b19.The vehicle speed sensor 2
The speed of automobile is predominantly detected, body-acceleration sensor 3 predominantly detects the normal acceleration of vehicle body, and vehicle body transverse acceleration passes
Sensor 4 predominantly detects the transverse acceleration of vehicle body, and hydraulic pressure sensor b19 is used to detect in the auxiliary chamber cavity of resorption 2003
The pressure of hydraulic oil, the liquid-pressure pick-up a15 are used for the pressure for detecting hydraulic oil in high pressure oil storage tank 14.The execution
Mechanism includes solenoid valve a8, solenoid valve b13, solenoid valve c18, solenoid valve d17, throttle orifice 5 and hydraulic pump 10.The electronic control
Unit 1 includes input module, computing module, solenoid valve control module, hydraulic pump control module, Damper Control module and output
Module forms；The input module is electrically connected and is used for the speed signal for receiving vehicle speed sensor 2, car with the testing agency
The vertical signal for faster of body acceleration transducer 3, the transverse acceleration signal and liquid pressure of vehicle body lateral acceleration sensor 4
The fluid pressure signal of force snesor b19 and the liquid-pressure pick-up a15, and be sent to computing module, computing module according to
Speed signal, vertical signal for faster and transverse acceleration signal calculate the rigidity and damping needed for suspension, and computing module is according to liquid
The fluid pressure signal of pressure pressure sensor b19 judges whether the pressure of nitrogen in auxiliary chamber epicoele 2001 meets that rigidity will
Ask, and the result of computing is transmitted to solenoid valve control module, solenoid valve control module generation control instruction, and by control instruction
Output module is transmitted to, the output module is electrically connected with the executing agency, and the output module is controlled according to instruction
The switch of solenoid valve a8, solenoid valve c18 and solenoid valve d17；Computing module is according to the liquid pressure of the liquid-pressure pick-up a15
Force signal judges whether the pressure of hydraulic oil in high pressure oil storage tank 14 meets the requirements, and the result of computing is transmitted to hydraulic pressure
Pump control module, hydraulic pump control module generation control instruction, and control instruction is transmitted to output module, the output mould
Root tuber controls the switch of hydraulic pump 10 according to instruction；Damping of the computing module according to needed for the signal of testing agency calculates suspension,
And result of calculation is transmitted to Damper Control module, the Damper Control module generates control instruction, and by control instruction
Output module is transmitted to, the output module controls the switch of throttle orifice 5 according to instruction.
A kind of control method according to the above-mentioned hydro pneumatic suspension with variable volume auxiliary chamber, comprises the following steps：
S1, the vehicle speed sensor 2 detect the speed signal of vehicle body in real time, and body-acceleration sensor 3 detects automobile
Vertical signal for faster, vehicle body lateral acceleration sensor 4 detect transverse acceleration signal, the hydraulic pressure sensor b19 of automobile
The fluid pressure signal of auxiliary chamber cavity of resorption 2003 is detected, the input module of the electronic control unit 1 receives the data of detection
And it is transmitted to computing module；
S2, computing module are firm according to needed for speed signal, vertical signal for faster and transverse acceleration signal calculate suspension
Degree and damping, judge whether the pressure of nitrogen in auxiliary chamber epicoele 2001 meets rigidity requirement according to fluid pressure signal, and
The result of computing is transmitted to solenoid valve control module and Damper Control module；
S3, when automobile needs less rigidity, Damper Control module generation control instruction, and control instruction is transmitted
To output module, output module control throttle orifice 5 is opened, and auxiliary chamber epicoele 2001 is turned on accumulator epicoele 601,
The volume of gas is set to become larger, the rigidity of suspension reduces；Simultaneously because in automobile vibration, have between accumulator and auxiliary chamber
Pressure differential, the aperture of electronic control unit control throttle orifice 5 make to produce suitable damping between auxiliary chamber and accumulator；
S4, when needing to obtain larger rigidity, solenoid valve control module generation instruction control control solenoid valve a8 lead to
Conduct, when solenoid valve c18 energizations are closed, due to body vibrations, piston b702 is moved upwards, high pressure oil storage tank 14 is with adding
The oilhole of hydraulic cylinder cavity of resorption 703 is closed, and the hydraulic oil of additional hydraulic cylinders cavity of resorption 703 is pressed into additional hydraulic cylinders epicoele 701；
During piston b702 downlinks, high pressure oil storage tank 14 is turned on the oil circuit of additional hydraulic cylinders cavity of resorption 703, the high pressure in high pressure oil storage tank 14
Hydraulic oil flows into additional hydraulic cylinders cavity of resorption 703, the hydraulic oil of compensation additional hydraulic cylinders cavity of resorption 703, in auxiliary chamber cavity of resorption 2003
Hydraulic oil volume and pressure be consequently increased, nitrogen volume reducing in auxiliary chamber epicoele 2001, pressure increase, make oil gas
The rigidity increase of suspension；
S5, when needing to reduce rigidity, the instruction control solenoid valve a8 of solenoid valve control module generation is closed, solenoid valve
C18 is turned on, and hydraulic oil when solenoid valve d17 is in left logical in auxiliary chamber cavity of resorption 2003 can flow to high pressure oil storage tank 14, at this time
The pressure of hydraulic oil reduces in auxiliary chamber cavity of resorption 2003, and the volume increase of nitrogen, pressure reduce in auxiliary chamber epicoele 2001,
The rigidity of hydro pneumatic suspension reduces.
As shown in figure 4, further including damping step, the damping step is specially：
In vehicle traveling process, the solenoid valve a8, solenoid valve b13 are initially at closed mode, and solenoid valve c18 is in and leads
Logical state, solenoid valve d17 are in right logical state；When automobile vibration makes the vehicle body of automobile downward, piston b702 is moved upwards, attached
Hydraulic oil in liquid feeding cylinder pressure cavity of resorption 703 is pressed into additional hydraulic cylinders epicoele 705, and high pressure oil is entered additional by fluid pressure line
Gas chamber cavity of resorption 2003；When vehicle body is upward, piston b702 is moved downward, and the pressure of additional hydraulic cylinders cavity of resorption 703 reduces, hydraulic oil
Additional hydraulic cylinders epicoele 705 is returned to from additional hydraulic cylinders cavity of resorption 703, additional hydraulic cylinders 7 play the role of damper at this time, reduce
Body vibrations.
As shown in figure 5, fuel feeding step when further including stiffness tuning；The fuel feeding step is specially：When high pressure oil storage tank
When pressure in 14 is less than setting value, hydraulic pump control module generation control instruction, and control instruction is transmitted to output module,
The output module makes the pressure of high pressure oil storage pot liquid reach required value according to instruction control oil supply system work.
As shown in fig. 6, oil extraction step when further including stiffness tuning；The oil extraction step is specially：When high pressure oil storage tank
When the pressure signal of liquid-pressure pick-up a15 in 14 is more than setting value, solenoid valve control module generation control instruction, and will
Control instruction is transmitted to output module, when the output module controls the b13 conductings of control solenoid valve according to instruction, high pressure oil storage
Hydraulic oil in tank (14) flow back into fuel tank 11.
The present invention by the damping action of 20 adjustable volume of auxiliary chamber and throttle orifice 5, realize hydro pneumatic suspension rigidity and
Damping is adjusted；The invention mainly comprises testing agency, executing agency, auxiliary chamber 20, additional hydraulic cylinders 7, hydro pneumatic suspension 6, oil
Case 11 and electronic control unit 1, by speed, vehicle body normal acceleration, vehicle lateral acceleration, auxiliary chamber cavity of resorption 2003
And the detection of the fluid pressure signal of high pressure oil storage tank 14, electronic control unit 1 is by controlling executing agency to realize additional gas
The adjusting of 20 hydraulic fluid pressure of room；Energy production high pressure liquid pressure oil when additional hydraulic cylinders 7 are using automobile vibration, it is additional to adjust
The pressure of nitrogen in gas chamber 20, so as to adjust the rigidity of hydro pneumatic suspension, additional hydraulic cylinders 7 not only act as the effect of damper, together
When reduce the waste of the energy；The present invention has wider stiffness tuning scope, simultaneously because throttle orifice 5 has damping action,
Therefore make automobile that there is more preferable ride comfort, be conducive to improve the comfort taken.
The embodiment is preferred embodiment of the invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (9)
1. a kind of hydro pneumatic suspension with variable volume auxiliary chamber, it is characterised in that including testing agency, executing agency, attached
Aerating room (20), additional hydraulic cylinders (7), high pressure oil storage tank (14), oil supply system, hydro pneumatic suspension (6) and electronic control unit
(1)；
The testing agency includes vehicle speed sensor (2), body-acceleration sensor (3), vehicle body lateral acceleration sensor (4)
With liquid-pressure pick-up b (19)；The executing agency includes solenoid valve a (8), solenoid valve c (18), solenoid valve d (17) and section
Discharge orifice (5)；
The auxiliary chamber (20) is divided into auxiliary chamber epicoele (2001) equipped with high pressure nitrogen and equipped with height by piston a (2002)
The auxiliary chamber cavity of resorption (2003) of hydraulic fluid pressure oil；The liquid-pressure pick-up b (19) is located in auxiliary chamber cavity of resorption (2003)；
The additional hydraulic cylinders (7) are divided into additional hydraulic cylinders epicoele (705) and additional hydraulic cylinders cavity of resorption (703) by check valve c (704)；
The diameter of additional hydraulic cylinders epicoele (705) is less than additional hydraulic cylinders cavity of resorption (703)；The additional hydraulic cylinders epicoele (705) and attached
Check valve c (704) is housed between liquid feeding cylinder pressure cavity of resorption (703)；The additional hydraulic cylinders epicoele (705) by fluid pressure line with it is attached
Aerating room cavity of resorption (2003) connects, and additional hydraulic cylinders cavity of resorption (703) is respectively by fluid pressure line and high pressure oil storage tank (14) and attached
Aerating room cavity of resorption (2003) connects；The solenoid valve a (8) is located at the high pressure oil storage tank (14) and auxiliary chamber cavity of resorption (2003)
Between fluid pressure line on；The solenoid valve c (18) and solenoid valve d (17) are sequentially arranged at the additional hydraulic cylinders cavity of resorption (703)
On fluid pressure line between high pressure oil storage tank (14)；Liquid between the solenoid valve d (17) and additional hydraulic cylinders cavity of resorption (703)
Pressure pipe road is equipped with check valve b (16)；The high pressure oil storage tank (14) is connected by fluid pressure line with oil supply system；Oil supply system
It is electrically connected with electronic control unit (1)；
The accumulator epicoele (601) of the hydro pneumatic suspension (6) is connected with auxiliary chamber epicoele (2001) by air-pressure duct；It is described
Throttle orifice (5) is located on the air-pressure duct between auxiliary chamber epicoele (2001) and accumulator epicoele (601)；
The electronic control unit (1) include input module, computing module, solenoid valve control module, Damper Control module and
Output module forms；The input module is electrically connected with the testing agency and the speed for receiving vehicle speed sensor (2) is believed
Number, vertical signal for faster, the transverse acceleration signal of vehicle body lateral acceleration sensor (4) of body-acceleration sensor (3)
With the fluid pressure signal of hydraulic pressure sensor b (19), and computing module is sent to, computing module is according to speed signal, vertical
Signal for faster and transverse acceleration signal calculate rigidity and the damping needed for suspension, judge auxiliary chamber according to fluid pressure signal
Whether the pressure of epicoele (2001) interior nitrogen meets rigidity requirement, and the result of computing is transmitted to solenoid valve control module and resistance
Buddhist nun's device control module, solenoid valve control module and the Damper Control module generate control instruction and by control instructions respectively
Output module is transmitted to, the output module is electrically connected with the executing agency, and the output module is according to solenoid valve control mould
Instruction control solenoid valve a (8), the solenoid valve c (18) of block generation and the switch of solenoid valve d (17)；The output module is according to resistance
The switch of the instruction control throttle orifice (5) of Buddhist nun's device control module generation.
2. the hydro pneumatic suspension according to claim 1 with variable volume auxiliary chamber, it is characterised in that the fuel feeding system
System includes hydraulic pump (10) and fuel tank (11)；The executing agency further includes solenoid valve b (13)；The testing agency further includes liquid
Pressure sensor a (15)；The electronic control unit (1) further includes hydraulic pump control module；
One end of the hydraulic pump (10) is connected with the high pressure oil storage tank (14), and the other end is connected with fuel tank (11)；The liquid
Hydraulic pipeline between press pump (10) and high pressure oil storage tank (14) is equipped with check valve a (12), the liquid-pressure pick-up a (15)
It is located in high pressure oil storage tank (14)；
The solenoid valve b (13) is located on the fluid pressure line between the high pressure oil storage tank (14) and fuel tank (11)；
The liquid-pressure pick-up a (15) is used for the pressure for detecting high pressure oil storage tank (14) interior hydraulic oil；The fluid pressure
Sensor a (15) is sent to computing module with the input module with being electrically connected and receiving liquid pressure signal, computing module
According to judging whether the pressure in the high pressure oil storage tank (14) meets the requirements according to fluid pressure signal, and by the result of computing
Hydraulic pump control module, hydraulic pump control module generation control instruction are transmitted to, and control instruction is transmitted to output module, institute
The output module stated controls the switch of hydraulic pump (10) according to instruction.
3. the hydro pneumatic suspension according to claim 2 with variable volume auxiliary chamber, it is characterised in that further include overflow
Valve (9)；One end of the overflow valve (9) is connected with the hydraulic pipeline between hydraulic pump (10) and check valve a (12), the other end with
Fuel tank (11) connects.
4. the hydro pneumatic suspension according to claim 1 with variable volume auxiliary chamber, it is characterised in that the solenoid valve
A (8), solenoid valve b (13) and solenoid valve c (18) are 2/2-way solenoid valve.
5. the hydro pneumatic suspension according to claim 1 with variable volume auxiliary chamber, it is characterised in that the solenoid valve
D (17) is two-bit triplet solenoid valve.
6. a kind of control method of the hydro pneumatic suspension according to claim 1 with variable volume auxiliary chamber, its feature
It is, comprises the following steps：
S1, the vehicle speed sensor (2) detect the speed signal of vehicle body in real time, body-acceleration sensor (3) detection automobile
Transverse acceleration signal, the hydraulic pressure sensor b of vertical signal for faster, vehicle body lateral acceleration sensor (4) detection automobile
(19) the fluid pressure signal of auxiliary chamber cavity of resorption (2003) is detected, the input module of the electronic control unit (1) receives inspection
The data of survey are simultaneously transmitted to computing module；
S2, computing module according to speed signal, vertical signal for faster and transverse acceleration signal calculate suspension needed for rigidity and
Damping, judges whether the pressure of auxiliary chamber epicoele (2001) interior nitrogen meets rigidity requirement according to fluid pressure signal, and will
The result of computing is transmitted to solenoid valve control module and Damper Control module；
S3, when automobile needs less rigidity, Damper Control module generation control instruction, and control instruction being transmitted to defeated
Go out module, output module control throttle orifice (5) is opened, and auxiliary chamber epicoele (2001) is led with accumulator epicoele (601)
It is logical, the volume of gas is become larger, the rigidity of suspension reduces；Simultaneously because in automobile vibration, between accumulator and auxiliary chamber
With pressure differential, the aperture of electronic control unit control throttle orifice (5) makes to produce suitable resistance between auxiliary chamber and accumulator
Buddhist nun；
S4, when needing to obtain larger rigidity, solenoid valve control module generation instruction control control solenoid valve a (8) be powered
Conducting, solenoid valve c (18) is powered when closing, and due to body vibrations, piston b (702) is moved upwards, high pressure oil storage tank (14) with
The oilhole of additional hydraulic cylinders cavity of resorption (703) is closed, and the hydraulic oil of additional hydraulic cylinders cavity of resorption (703) is pressed into additional hydraulic cylinders
Epicoele (701)；During piston b (702) downlink, high pressure oil storage tank (14) is turned on the oil circuit of additional hydraulic cylinders cavity of resorption (703), high pressure
High-pressure and hydraulic oil stream in oil storage tank (14) is into additional hydraulic cylinders cavity of resorption (703), the hydraulic pressure of compensation additional hydraulic cylinders cavity of resorption (703)
Oil, hydraulic oil volume and pressure in auxiliary chamber cavity of resorption (2003) are consequently increased, the nitrogen in auxiliary chamber epicoele (2001)
Air space is reduced, pressure increase, makes the rigidity of hydro pneumatic suspension increase；
S5, when need reduce rigidity when, solenoid valve control module generation instruction control solenoid valve a (8) close, solenoid valve c
(18) turn on, hydraulic oil when solenoid valve d (17) is in left logical in auxiliary chamber cavity of resorption (2003) can flow to high pressure oil storage tank
(14), the pressure of auxiliary chamber cavity of resorption (2003) interior hydraulic oil reduces at this time, the volume of auxiliary chamber epicoele (2001) interior nitrogen
Increase, pressure reduce, and the rigidity of hydro pneumatic suspension reduces.
7. the control method of the hydro pneumatic suspension with variable volume auxiliary chamber according to claim 6, it is characterised in that also
Including damping step, the damping step is specially：
In vehicle traveling process, the solenoid valve a (8), solenoid valve b (13) are initially at closed mode, and solenoid valve c (18) is in
Conducting state, solenoid valve d (17) are in right logical state；When automobile vibration makes the vehicle body of automobile downward, piston b (702) is upward
Move, the hydraulic oil in additional hydraulic cylinders cavity of resorption (703) is pressed into additional hydraulic cylinders epicoele (705), and high pressure oil passes through hydraulic pressure
Pipeline enters auxiliary chamber cavity of resorption (2003)；When vehicle body is upward, piston b (702) is moved downward, additional hydraulic cylinders cavity of resorption
(703) pressure reduces, and hydraulic oil returns to additional hydraulic cylinders epicoele (705) from additional hydraulic cylinders cavity of resorption (703), adds liquid at this time
Cylinder pressure (7) plays the role of damper, reduces body vibrations.
8. the control method of the hydro pneumatic suspension with variable volume auxiliary chamber according to claim 6, it is characterised in that also
Fuel feeding step during including stiffness tuning；The fuel feeding step is specially：When the pressure in high pressure oil storage tank (14) is less than setting
During value, hydraulic pump control module generation control instruction, and control instruction is transmitted to output module, the output module according to
Instruction control oil supply system work, makes the pressure of high pressure oil storage pot liquid reach required value.
9. the control method of the hydro pneumatic suspension with variable volume auxiliary chamber according to claim 6, it is characterised in that also
Oil extraction step during including stiffness tuning；The oil extraction step is specially：When the fluid pressure sensing in high pressure oil storage tank (14)
When the pressure signal of device a (15) is more than setting value, solenoid valve control module generation control instruction, and control instruction is transmitted to defeated
Go out module, when the output module controls control solenoid valve b (13) conductings according to instruction, the hydraulic pressure in high pressure oil storage tank (14)
Oil stream returns to fuel tank (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610156211.3A CN105835649B (en) | 2016-03-18 | 2016-03-18 | A kind of hydro pneumatic suspension and its control method with variable volume auxiliary chamber |
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| CN201610156211.3A CN105835649B (en) | 2016-03-18 | 2016-03-18 | A kind of hydro pneumatic suspension and its control method with variable volume auxiliary chamber |
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| JP6579125B2 (en) * | 2017-02-15 | 2019-09-25 | トヨタ自動車株式会社 | Suspension system |
| CN109466270B (en) * | 2017-10-18 | 2020-07-24 | 北京京西重工有限公司 | Parallel leveling system for vehicle |
| CN109109604A (en) * | 2018-08-31 | 2019-01-01 | 江苏科技大学 | A kind of air spring volume adjustment mechanism and its control method |
| CN109501545B (en) * | 2018-10-31 | 2021-06-22 | 江苏大学 | Air suspension, vehicle with air suspension and method for installing air suspension |
| CN110091888B (en) | 2019-04-19 | 2020-04-28 | 中车青岛四方机车车辆股份有限公司 | Control method and device of anti-snaking shock absorber |
| CN110744980A (en) * | 2019-11-06 | 2020-02-04 | 西安科技大学 | Multi-mode combined energy-feedback type suspension actuator and control method thereof |
| CN111267574B (en) * | 2020-04-03 | 2021-08-17 | 湖南工学院 | Steering and suspension integrated anti-roll structure and control method |
| CN112976979B (en) * | 2021-04-12 | 2022-08-30 | 石河子大学 | Air suspension control method and device of high-ground-clearance spraying machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10337601A1 (en) * | 2003-08-16 | 2005-03-10 | Deere & Co | Hydropneumatic suspension device |
| CN102991296B (en) * | 2011-09-19 | 2015-03-18 | 北汽福田汽车股份有限公司 | Hydro-pneumatic suspension device, hydro-pneumatic suspension frame, underpan and vehicle |
| CN102606663B (en) * | 2012-03-21 | 2014-02-12 | 江苏大学 | Additional air chamber of volume-variable air spring |
| CN104057797B (en) * | 2013-03-22 | 2016-03-30 | 刘胜 | Intelligent hydraulic suspension unit and control method thereof |
| CN105329058B (en) * | 2015-11-19 | 2017-09-05 | 江苏大学 | A kind of energy regenerative type active air suspension system and its control method |
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