CN1593962A - Vehicle suspension vibration damper with relative velocity self-sensing function - Google Patents
Vehicle suspension vibration damper with relative velocity self-sensing function Download PDFInfo
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- CN1593962A CN1593962A CN 200410040168 CN200410040168A CN1593962A CN 1593962 A CN1593962 A CN 1593962A CN 200410040168 CN200410040168 CN 200410040168 CN 200410040168 A CN200410040168 A CN 200410040168A CN 1593962 A CN1593962 A CN 1593962A
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Abstract
The invention relates to a kind of automobile suspension shock absorber with self sensing function of relative speed . It consists of cylinder block and the liquid in it , dust cap , piston head , piston rod , the magnet exciting coil on the piston head , the induction coil in the piston rod , etc . When load alternating voltage signal in middle frequency to the magnet exciting coil , it will produce same-frequency alternating magnetic field which will form a closed magnetic circuit in the shock absorber and make the induction coil produce a alternating voltage signal in the same frequency . The shock of the automobile will induce the corresponding linear change to the magnetic linkage of induction coil , the voltage signal produced in the two end of the coil will be a double sidebands amplitude-modulated signal among which the range adjusting signal reflects relative speed between automobile body and automobile bridge , thus realize the sensing of the relative speed between the automobile body and automobile bridge , thus make the shock absorber not only get the damping function but also get the self sensing function of relative speed , and further realize the self-adapting damp shock reducing of the automobile suspension system .
Description
Technical field
The present invention relates to a kind of vehicle suspension shock absorber, especially at a kind of shock absorber of the controlled semi-active vehicle suspension system design-calculated of dumping force with relative velocity self-sensing function.
Technical background
Vehicle suspension is meant the general name of all the power transmission connecting devices between vehicle body and the vehicle bridge.The suspension system of vehicle has directly determined the travelling comfort and the road-holding property of vehicle.In recent years, in order to improve the performance of suspension system, improve the travelling comfort and the road-holding property of vehicle, people's research has also been developed multiple semi-active suspension system.The controlled semi-active vehicle suspension system of dumping force mainly is made of parts such as sensor, shock absorber, spring, electronic control package, automatically controlled servovalve, energy storages (comprising fluid reservoir and nitrogen chamber).In the vehicle ' process, electronic control package according to sensor to vehicle body status and pavement conditions send control commands corresponding realizes the dumping force of shock absorber by the mode of operation that changes automatically controlled servovalve corresponding control and adjusting.In the dumping force control system of this closed loop, important input is exactly the speed of relative movement between shock absorber two ends institute bonded assembly vehicle body and the vehicle bridge.
In the controlled semi-active vehicle suspension system of existing dumping force, realize that the mode of the speed of relative movement sensing between vehicle body and the vehicle bridge mainly contains two kinds: adopt the relative position sensor mode and adopt the acceleration pick-up mode.Generally in suspension system, dispose one or more relative position sensors (installing side by side) when adopting the relative position sensor mode with shock absorber, one end of sensor is connected on the vehicle body, the other end is connected on the vehicle bridge, sensor converts the variation of the relative position between vehicle body and the vehicle bridge to electric signal when Vehicular vibration, and this signal promptly obtains relative velocity by differential circuit.Generally in the appropriate location of vehicle body and vehicle bridge one or more acceleration pick-ups are installed respectively when adopting the acceleration pick-up mode, by corresponding two-way acceleration signal being subtracted each other and through follow-up integrating circuit acquisition vehicle body and the speed of relative movement between the vehicle bridge.No matter adopt which kind of sensing mode, the sensor of configuration has not only increased the cost and the structural complexity of whole suspension system separately, and directly be exposed to sensor among the external environment condition and be easy to be subjected to the interference of external environment (as mechanical collision, infiltration oil impregnate etc.) and damage, thereby influence the global reliability and the stability of suspension system, shorten the service life of system.
Thomas W.Nehl, " Vehicle SuspensionDamper with Relative Velocity Sensor Having Controlled Flux Path " (translated name: vehicle suspension damping device by name of applications such as Jeri A.Betts and Larry S.Mihalko with relative velocity sensor of controlled magnetic circuit, US Patent, the patent No.: patent of invention 5252729,1993) discloses a kind of new vehicle suspension shock-absorber of integrated relative velocity sensor.In its disclosed patent, adopt the excitation field of the stationary magnetic field of permanent magnet generation, and utilize the part-structure (comprising the dustproof enclosure) of shock absorber to form closed work magnetic loop as the relative velocity sensor.When this shock absorber is operated in the actual environment, its work magnetic loop is easy to be subjected to the electromagnetic interference effect from vehicle body, road surface and vehicle periphery, the voltage signal of the sign relative velocity of induction coil two ends induction generation is distorted, cause the error of relative velocity sensing to increase.Simultaneously, because the dust boot of shock absorber is enclosed within the outside of cylinder body, and the kind of air-gap design between the dustproof enclosure and the cylinder body is a pith of work magnetic circuit, have only size of gaps to be maintained fixed the constant induced voltage signal that just can make induction coil and vehicle body and become the favorable linearity proportionate relationship with speed of relative movement between the vehicle bridge, but be difficult in the actual vehicle vibration processes guarantee that the size of this air gap immobilizes, thereby the accuracy and the stability decreases that cause relative velocity to be measured.In addition, because therefore the dustproof enclosure of shock absorber will will adopt the metallic material of magnetic conduction as the part of the closed work magnetic circuit of relative velocity sensor, then can't apply for the shock absorber that adopts the dustproof enclosure of other form such as rubber.These are not enough and limitation makes people's such as Thomas patent of invention should use the restriction that is subjected to a certain degree.
Summary of the invention
The invention discloses a kind of vehicle suspension shock absorber with relative velocity self-sensing function, it is integrated magneto-electric relative velocity sensor on the structure of existing vehicle suspension shock absorber, realize real-time, the accurately detection of the speed of relative movement between vehicle body and the vehicle bridge, make the vehicle suspension shock absorber not only have the damping vibration attenuation function, but also have relative velocity self-sensing function, further realize the self-adaptive damping vibration damping purpose of vehicle suspension system.
Purpose of the present invention is realized by following scheme:
A kind of vehicle suspension shock absorber with relative velocity self-sensing function comprises the cylinder body in the fluid pressure type monotubular shock absorber and is contained in the interior liquid of cylinder body, piston rod and connection piston head, upper end cover, bottom end cover and seal ring thereon.The upper end cover of cylinder body has dust boot outward, in order to protect piston rod and to prevent that introduced contaminants from entering cylinder body.Piston head is divided into two epitrochoidal chambers up and down to cylinder body, and liquid flows between two epitrochoidal chambers back and forth by the damping hole of piston head and the dash pot valve of outside and shock absorber cooperating.There is connecting device to be connected on piston rod outer end and the cylinder barrel bottom end cover with the vehicle body or the vehicle bridge of vehicle.The present invention is wound with a magnet coil on piston head, as the excitation coil of relative velocity sensor, the lead-in wire of excitation coil connects outside excitation signal source, i.e. intercarrier signal source.Simultaneously, piston rod is designed to hollow tubular structure, in the piston rod the inside wire winding pole is housed, and on wire winding pole even coiling one magnet coil, induction coil as the relative velocity sensor, the lead-in wire of induction coil connects the outward sign pre-process circuit, and scribbles the insulation glue-line on every side at the outside face and the lead-in wire thereof of above-mentioned excitation coil and induction coil.The bottom end cover of the piston rod of shock absorber, cylinder barrel adopts extremely low permeability magnetic material among the present invention, and the wire winding pole in the piston head, piston rod, the cylinder barrel and the upper end cover of cylinder body all adopt high permeability material.In addition, between cylinder barrel and the piston head, adopt free-running fit between upper end cover and the piston rod.
Piston head of the present invention adopts the cylinder I-shape construction, excitation coil evenly is wound in the I-shape groove, there is the pressing line disk of the utmost point low permeability upper end of piston head, have the breach that the lead-in wire that holds excitation coil passes on it, the lower end of piston head is fixedly connected on the piston rod by the packing ring and the jam nut of utmost point low permeability.
Vehicle suspension shock absorber with relative velocity self-sensing function of the present invention, when loading an intermediate frequency alternating voltage signal to excitation coil by outside excitation signal source, the same frequency alternating magnetic field that it produces will form a closed magnetic loop between upper end cover, cylinder barrel, cylinder barrel and the piston of the wire winding pole in piston head, the piston rod, cylinder body and in the air gap between upper end cover and the piston rod, and making induction coil produce together alternating voltage signal frequently, the amplitude of excitation signal directly determines the size of magnetic flow in the magnetic loop.Piston head and piston rod produce the axial relative motion identical with oscillation frequency with respect to cylinder body when Vehicular vibration, owing between the cylinder barrel and piston of shock absorber, adopt free-running fit between upper end cover and the piston rod, make that the air gap between them remains unchanged substantially.Because most magnetic resistance of magnetic loop concentrate on this air gap, air gap is constant substantially when Vehicular vibration makes the magnetic resistance in the magnetic loop remain unchanged substantially, and magnetic resistance remains unchanged substantially and makes the magnetic flow in the magnetic loop remain unchanged substantially.The piston rod of shock absorber with respect to this of cylinder body or advance or go out to axial the motion make the coil turn of induction coil in magnetic loop correspondingly increase or reduce.Because magnetic resistance and magnetic flow remain unchanged substantially in the magnetic loop, the variation of coil turn will cause that magnetic linkage of induction changes thereupon, and the voltage signal of inducting in the two ends that make this coil becomes a both side band amplitude-modulated signal, its am signals is consistent with the Changing Pattern of magnetic linkage, the carrier signal of this amplitude-modulated signal then is original intermediate frequency alternating voltage signal in the induction coil, this amplitude-modulated signal is sent shock absorber as the voltage output signal of induction coil by the lead-in wire of coil, and be sent to the outward sign pre-process circuit and amplify, demodulation, Signal Pretreatment such as filtering obtain and the consistent am signals of induction coil magnetic linkage Changing Pattern.Speed of relative movement between the Changing Pattern of this signal and vehicle body and the vehicle bridge is certain proportionate relationship, and the frequency of signal is consistent with this relative motion frequency, and the amplitude of signal becomes certain linear relationship with this relative motion amplitude.Like this, make the vehicle suspension shock absorber that constitutes thus can realize real-time detection, make shock absorber have relative velocity self-sensing function the speed of relative movement between vehicle body and the vehicle bridge.
Advantage of the present invention:
1. the present invention has simplified the structure of the controlled semi-active vehicle suspension system of dumping force, can reduce system cost.Adopt vehicle suspension shock absorber of the present invention can constitute the controlled semi-active vehicle suspension system of various dumping forces (as the suspension system of motor bike, automobile or train etc.), thereby save the various relative position sensors or the acceleration pick-up that are used to detect relative velocity between vehicle body and the vehicle bridge, improve the integrated level of whole suspension system structure, the reduction system at equipment, accordingly install and safeguard aspect cost.
2. the present invention is integrated with relative velocity sensor and shock absorber, and anti-outside electromagnetic interference ability is strong.In the present invention, the relative velocity sensor adopts has the strong intermediate frequency active sensor principle formation of anti-electromagnetic interference capability, promptly utilize the outside voltage of intermediate frequency signal source that provides on excitation coil, to produce same frequency electromagnetic field, and on the shock absorber inner structure, form the magnetic loop of a closure, in induction coil, will induct and obtain a same frequency voltage output signal that comprises the relative vibration velocity information of vehicle body with vehicle bridge, amplify the electromagnetic interference effect that to eliminate extraneous various frequency ranges by frequency-selecting, make this sensor have very strong anti-outside electromagnetic interference ability carrier signal.Adopt permanent magnet as excitation field in people's such as Thomas the patent thereby effectively overcome, the work magnetic loop of making is easy to be subjected to outside electromagnetic interference and causes induction coil output signal on its dust boot that the phenomenon of distortion takes place, and is beneficial in actual applications and promotes.
3. the relative velocity accuracy of detection height of the integrated relative velocity sensor of shock absorber among the present invention.In the present invention, owing to adopt free-running fit between cylinder barrel and the piston and between cylinder body upper end cover and the piston rod, this gap can remain unchanged in the Vehicular vibration process, make the size of gaps in the work magnetic loop also correspondingly remain unchanged, the relative velocity voltage signal that thereby making inducts on the induction coil obtains is linear with actual vehicle body and the relative vibration velocity between the vehicle bridge, guarantees the velocity pick-up precision.Effectively overcome in people's such as Thomas the patent owing to the work magnetic circuit size of gaps can not be maintained fixed the sensing accuracy decline problem that the transducing signal that occurs and the linear relationship instability of actual relative vibration velocity cause.
4. the present invention can improve the functional reliability and the stability of the controlled semi-active vehicle suspension system of dumping force.The present invention makes the vehicle suspension shock absorber self have the relative velocity sensing function, avoided the relative velocity sensor directly to be exposed among the abominable operate outside environment between vehicle body and the vehicle bridge and the various external environments that are subjected to (as mechanical collision, infiltration oil impregnate etc.) disturb the working sensor performance that causes to descend, thereby improve the anti-external environmental interference ability of relative velocity sensing, the vibration control effect of enhancement controller, guarantee and improve the functional reliability and the stability of suspension system on the whole, prolong the service life of system.
5. the structure and material of the dust boot of disclosed shock absorber can be selected configuration flexibly according to practical situations among the present invention, the material of dust boot can be rubber or metal, thereby overcomes in people's such as Thomas the patent dust boot as the part of work magnetic circuit and essential and material must be the application limitation of metal magnetic conducting material.
Description of drawings
Fig. 1 is the part sectional view of a kind of example structure scheme drawing of the present invention.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is that (main flux of relative velocity autobiography sensor is at a time at the inner formation work of shock absorber magnetic loop scheme drawing during the alternating voltage signal of 1KHz～40KHz) when the excitation coil two ends of giving Fig. 1 embodiment load an intermediate frequency.
The specific embodiment
Describe concrete structure of the present invention in detail below in conjunction with accompanying drawing:
With reference to Fig. 1, Fig. 2, this vehicle suspension shock absorber mainly comprises cylinder body 15 and is contained in the excitation coil 25 on the interior liquid 35 of cylinder body, piston rod 7, piston head 18, dust boot 6, the piston, the parts such as induction coil 10 in the piston rod.The cylinder body of shock absorber mainly is made of the cylinder barrel 16 of high permeability and the bottom end cover 33 of upper end cover 14 and utmost point low permeability, and bottom end cover 33 is provided with connecting device 34, is used to connect vehicle body or vehicle bridge.The piston rod 7 of shock absorber is processed to form by low-permeability material, and the piston rod outer end is provided with suspension ring connecting device 1 and is used to connect vehicle body or vehicle bridge.Piston rod 7 is a hollow tubular structure, and a solid wire winding pole 11 of high magnetic conduction is housed, and is provided with insulating gel envelope 36,37 at the two ends of wire winding pole.Even coiling one magnet coil on the wire winding pole 11, as the induction coil 10 of relative velocity sensor, the lead-in wire 5 of induction coil connects outward sign pre-process circuits 4 by the hollow tubular structure part 8 of piston rod.The piston head 18 of shock absorber is enclosed within the inner one side of piston rod 7, and is fixedly connected on the piston rod by the packing ring 29 and the jam nut 30 of utmost point low permeability.The piston head 18 of shock absorber is the cylinder I-shape construction, be formed with cylinder convex step 27, the piston head 18 with high permeability is at pressing line disk 23, cylinder convex step 27, packing ring 29 and jam nut 30 that utmost point low permeability is housed successively near the less end of piston rod external diameter.Even coiling one magnet coil in the groove of the piston head of cylinder I-shape construction, as the excitation coil 25 of the relative velocity sensor among the present invention, the lead-in wire of excitation coil 2 is connected outside excitation signal source 3 by the hollow tubular structure part 8 of aperture 19 on the breach 21 on the pressing line disk 23, wire casing ditch 20, the piston rod and piston rod.Outside face and lead-in wire thereof at induction coil 10 and excitation coil 25 all scribble insulation glue- line 9,24 on every side.Piston head is divided into epitrochoidal chamber 17 and 31 two parts of following epitrochoidal chamber to cylinder body 15, and two epitrochoidal chambers all are loaded with liquid 35 up and down, and the sidewall of cylinder body lower end is provided with the connecting bore 32 that is used to connect outside automatically controlled dash pot valve, and is provided with cutoff port 22 on piston head.In order to ensure the leak tightness of shock absorber, all adopt O RunddichtringO 13,26 in the junction of piston, piston rod, cylinder body and cylinder barrel.During Vehicular vibration, the vehicle body of vehicle and vehicle bridge generation relative motion make the piston of shock absorber and piston rod produce with motion to axial frequently with respect to cylinder body, the piston of axial motion by the cutoff port on the piston head 22, cylinder side wall connecting bore 32 and the outside automatically controlled dash pot valve (not providing among the figure) that links to each other with connecting bore 32 make between the energy storage (comprising fluid reservoir and nitrogen chamber) that liquid do not provide among epitrochoidal chamber 17 and following epitrochoidal chamber 31 and the figure on cylinder body mobile back and forth, a plurality of cutoff ports 22 on the piston head and automatically controlled dash pot valve realization damping vibration attenuation.Kinematic velocity to axial between the detected piston rod 7 of exterior electronic control package (not providing among the figure) relative velocity autobiography sensor that provide according to the present invention and that existing damper structure is integrated, piston head 18 and the cylinder body 7, the flow of the switching extent control liquid of the automatically controlled dash pot valve that real-time regulated links to each other with connecting bore 32, half active adaptive control of realization suspension damping power.Wherein, contents such as the concrete control apparatus of the concrete structure of shock absorber itself, dumping force and electronic control package can obtain in the correlation technique data of the controlled semi-active vehicle suspension system of existing dumping force (as motor bike, automobile, train etc.), these contents and this shock absorber are used, so do not provide relevant accompanying drawing and detailed elaboration thereof.According to content set forth in the present invention, on the damper structure basis of existing this class suspension system, can realize the present invention at an easy rate simultaneously.
With reference to Fig. 3, (during the alternating voltage signal of 1KHz～40KHz), the same frequency alternating magnetic field that its produces will be at the air gap 28 formation closed magnetic loops 38 between the convex step of upper end cover 14, cylinder barrel 16, cylinder barrel and the piston of the air gap 12 between the convex step 27 of piston head, the upper end cover 14 of wire winding pole 11, piston rod and cylinder body in the piston rod, cylinder body when circuit turn-on, the excitation coil two ends in excitation signal source load an intermediate frequency in the present embodiment.Most magnetic flow in the magnetic field that excitation coil produced form the main flux in this magnetic field by this magnetic circuit, and make induction coil produce together alternating voltage signal frequently, and the amplitude of excitation signal directly determines the size of magnetic flow in the magnetic loop.The leakage magnetic flux that also has hoot at positions such as air gap 12,28, piston rod 7, piston head 18 and cylinder bodies 15 simultaneously and since this leakage magnetic flux compare with the main flux of magnetic loop very little, so ignore.
The principle of work of this shock absorber is as follows:
When Vehicular vibration, piston rod 7, piston head 18 produce the axial relative motion identical with oscillation frequency with respect to cylinder body 15, between the cylinder barrel 16 and piston head 18 of shock absorber, adopt free-running fit between upper end cover 14 and the piston rod 7, make that the air gap 12,28 between them remains unchanged substantially.Because most magnetic resistance of magnetic loop concentrate on these air gaps, air gap is constant substantially when Vehicular vibration makes the magnetic resistance in the magnetic loop remain unchanged substantially, and magneto-resistive remaining unchanged substantially makes the magnetic flow in the magnetic loop remain unchanged substantially.Do in the drawing process at the piston of shock absorber, piston rod stretches out cylinder body gradually, make the coil turn of induction coil 10 in magnetic loop of piston rod the inside correspondingly reduce, because magnetic resistance and magnetic flow remains unchanged substantially in the magnetic loop, the minimizing of induction coil number of turn in magnetic field will cause that its magnetic linkage also reduces thereupon, because electromagnetic induction effect, make that the amplitude of original intermediate frequency alternating voltage signal also begins to reduce gradually thereupon in the induction coil; Equally, do in the compression process at the piston of shock absorber, the coil turn of induction coil 10 in magnetic loop of piston rod the inside correspondingly increases, magnetic resistance and magnetic flow remain unchanged equally in the magnetic loop, magnetic linkage of induction also increases thereupon like this, makes that the amplitude of the intermediate frequency alternating voltage signal of original 1KHz～40KHz begins again to increase in the induction coil; Simultaneously since piston rod stretch out or enter the frequency of the speed of cylinder body much smaller than intercarrier signal, so the induced voltage signal on the induction coil will become a both side band amplitude-modulated signal, the am signals of this amplitude-modulated signal is consistent with the Changing Pattern of magnetic linkage, and the carrier signal of this amplitude-modulated signal then is the intermediate frequency alternating voltage signal of original 1KHz～40KHz.This amplitude-modulated signal is sent shock absorber by the lead-in wire of induction coil, through obtaining and the consistent am signals of induction coil magnetic linkage Changing Pattern behind the pre-process circuits such as exterior signal frequency-selecting amplification, demodulation, filtering.Like this, electronic control package just can in real time, accurately obtain speed of relative movement between vehicle body and the vehicle bridge by analyzing this voltage output signal, make existing vehicle suspension shock absorber, especially the shock absorber of the controlled semi-active vehicle suspension system of dumping force not only has the damping vibration attenuation function, also have the relative velocity self-sensing function between vehicle body and the vehicle bridge, further realize the self-adaptive damping vibration damping of vehicle suspension.
Claims (4)
1. vehicle suspension shock absorber with relative velocity self-sensing function, comprise cylinder body and be contained in the interior liquid of cylinder body, piston rod and connection piston head, upper end cover, bottom end cover and seal ring thereon, the upper end cover of cylinder body has dust boot outward, piston head is divided into two epitrochoidal chambers up and down to cylinder body, liquid by the damping hole on the piston head and and shock absorber bonded assembly dash pot valve between two epitrochoidal chambers, flow back and forth, have connecting device to be connected on piston rod outer end and the cylinder body bottom end cover with the vehicle body or the vehicle bridge of vehicle; It is characterized in that: coiling one magnet coil on the described piston head, as the excitation coil of relative velocity sensor, the lead-in wire of excitation coil connects outside excitation signal source; Piston rod adopts hollow tubular structure, and a wire winding pole is equipped with in the inside, and on wire winding pole even coiling one magnet coil, as the induction coil of relative velocity sensor, the lead-in wire of induction coil connects the outward sign pre-process circuit; Outside face and lead-in wire thereof at excitation coil and induction coil all scribble the insulation glue-line on every side; The piston rod of shock absorber, cylinder body bottom end cover adopt extremely low permeability magnetic material, and wire winding pole, cylinder barrel and upper end cover in the piston head, piston rod all adopt high permeability material; Between cylinder barrel and the piston head, adopt free-running fit between upper end cover and the piston rod.
2. the vehicle suspension shock absorber with relative velocity self-sensing function according to claim 1, it is characterized in that: described piston head adopts the cylinder I-shape construction, excitation coil evenly is wound in the I-shape groove, there is the pressing line disk of the utmost point low permeability upper end of piston head, have the breach that the lead-in wire that holds excitation coil passes through on it, the lower end of piston head is fixedly connected on the piston rod by the packing ring and the jam nut of utmost point low permeability.
3. the vehicle suspension shock absorber with relative velocity self-sensing function according to claim 1 and 2 is characterized in that: load the alternating voltage signal of an intermediate frequency to excitation coil, as the carrier signal of relative velocity sensor.
4. the vehicle suspension shock absorber with relative velocity self-sensing function according to claim 1 and 2 is characterized in that: the wire winding pole two ends are provided with the insulating gel envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401681A CN100344472C (en) | 2004-07-07 | 2004-07-07 | Vehicle suspension vibration damper with relative velocity self-sensing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401681A CN100344472C (en) | 2004-07-07 | 2004-07-07 | Vehicle suspension vibration damper with relative velocity self-sensing function |
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| CN1593962A true CN1593962A (en) | 2005-03-16 |
| CN100344472C CN100344472C (en) | 2007-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100401681A Expired - Fee Related CN100344472C (en) | 2004-07-07 | 2004-07-07 | Vehicle suspension vibration damper with relative velocity self-sensing function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348886C (en) * | 2005-09-15 | 2007-11-14 | 重庆大学 | Self sensing method and system for cylinder inductive magnetic rheology damper integrated relative displacement |
| CN101580064B (en) * | 2009-06-09 | 2012-05-16 | 北京建筑工程学院 | Adaptive control method for controlling vibration of vehicle |
| CN107054253A (en) * | 2016-02-11 | 2017-08-18 | 福特全球技术公司 | Identification, checking and notice that potential chassis is damaged |
| CN109751354A (en) * | 2017-11-02 | 2019-05-14 | 郑州宇通客车股份有限公司 | Air-supported shock absorber and the suspension system using the air-supported shock absorber, vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1209599B (en) * | 1984-11-15 | 1989-08-30 | Siette Spa | LEVEL DETECTION SYSTEM FOR VEHICLES. |
| US4989844A (en) * | 1986-06-23 | 1991-02-05 | Monroe Auto Equipment Company | Vehicle leveling shock absorber assembly |
| US4909536A (en) * | 1988-10-24 | 1990-03-20 | Monroe Auto Equipment | Electronic height sensor |
| US5251729A (en) * | 1991-12-20 | 1993-10-12 | General Motors Corporation | Vehicle suspension damper with relative velocity sensor having controlled flux path |
| CN2708034Y (en) * | 2004-07-07 | 2005-07-06 | 重庆大学 | Vibration damper for vehicle suspension |
-
2004
- 2004-07-07 CN CNB2004100401681A patent/CN100344472C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348886C (en) * | 2005-09-15 | 2007-11-14 | 重庆大学 | Self sensing method and system for cylinder inductive magnetic rheology damper integrated relative displacement |
| CN101580064B (en) * | 2009-06-09 | 2012-05-16 | 北京建筑工程学院 | Adaptive control method for controlling vibration of vehicle |
| CN107054253A (en) * | 2016-02-11 | 2017-08-18 | 福特全球技术公司 | Identification, checking and notice that potential chassis is damaged |
| CN109751354A (en) * | 2017-11-02 | 2019-05-14 | 郑州宇通客车股份有限公司 | Air-supported shock absorber and the suspension system using the air-supported shock absorber, vehicle |
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| CN100344472C (en) | 2007-10-24 |
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Granted publication date: 20071024 Termination date: 20130707 |