CN115723501A

CN115723501A - Air spring assembly and car

Info

Publication number: CN115723501A
Application number: CN202211393125.6A
Authority: CN
Inventors: 贾飞
Original assignee: Beijing Changan Automobile Engineering Technology Research Co Ltd
Current assignee: Beijing Changan Automobile Engineering Technology Research Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-03

Abstract

The invention relates to an air spring assembly and an automobile, wherein the air spring assembly comprises an air spring, an air chamber and an isolation valve, the isolation valve is arranged between an air bag and a rigid air chamber of the air spring, and the isolation valve is used for controlling the connection and disconnection of the air bag and the air chamber; the isolating valve comprises a valve body provided with a valve port and a valve plate used for opening and closing the valve port, when the valve port is opened, the valve port is communicated with the air bag and the air chamber, and when the valve port is closed, the isolating valve separates the air bag and the air chamber. An automobile includes an air spring assembly and a controller for controlling the opening and closing of the isolation valve. The rigidity of the air spring assembly can be changed, so that different requirements of a braking working condition, a steering working condition and a straight-ahead working condition on the rigidity of the air spring are better considered, and the comfort and the maneuverability of the whole vehicle are improved; according to the invention, through reasonably arranging the structures of the air chamber and the isolation valve, the rigidity of the air spring assembly can be rapidly changed, so that the response speed of the air spring assembly can meet the requirements of roll and pitch control.

Description

Air spring assembly and car

Technical Field

The invention relates to an automobile, in particular to an air spring assembly and an automobile.

Background

The air spring is gradually popularized in an automobile suspension system, is arranged between an automobile body and a suspension, has the advantages of adjustable automobile body height, obvious nonlinear rigidity and the like, and improves the maneuverability and the comfort of an automobile.

The air spring in practical application at present usually realizes slow adjustment by inflating and deflating the air bag, and has the following technical problems: because a certain time is needed for inflating the air bag of the air spring by using the inflating device, active control on rapid change processes of steering heeling, braking pitching and the like cannot be realized, the displacement of the automobile body is obviously increased at the initial moment of working conditions of emergency steering, emergency braking and the like, a driver can feel that the support of the suspension is insufficient, and the confidence is reduced.

For example, the air spring for independently adjusting the height and the rigidity disclosed in the patent application with the application number of CN201610230749.4 and the control method thereof, and for example, the system and the method for controlling the vehicle attitude of the electrically controlled air suspension disclosed in the patent application with the application number of CN201810895423.2, both of the two patent applications adjust the rigidity of the air spring in an inflation and deflation manner, so that the problem of slow adjustment of the rigidity of the air spring exists, and the active control of the roll and the pitch of the vehicle is difficult to realize.

In some prior arts, an air chamber and an electromagnetic valve are added on the basis of an existing air spring, the electromagnetic valve is arranged between an air bag and the air chamber of the air spring, and the electromagnetic valve can control the on-off of the air bag and the air chamber. Although the rigidity of the air spring can be adjusted more quickly by additionally arranging the air chamber and the electromagnetic valve, the following technical problems exist in the use process: the sudden change of the stiffness of the air spring brings jitter, which causes adverse effects on the performance and the service life of the air spring; because the electromagnetic valve is adopted to control the on-off of the air bag and the air chamber, the air passage which is communicated with the air bag and the air chamber is longer, the sectional area of the air passage is small, the slender air passage can limit the flow of the gas flowing between the air bag and the air chamber, the damping effect and abnormal sound can be generated when the gas flow rapidly passes through the slender air passage, and the volume ratio of the air chamber and the air bag in the prior art is usually not more than 1/4 due to the limitation of the air passage to the flow of the gas flowing between the air bag and the air chamber, so that the rigidity adjusting amplitude of the existing air spring is smaller.

Disclosure of Invention

It is an object of the present invention to provide an air spring assembly and vehicle that alleviates or eliminates at least one of the above-mentioned problems.

The air spring assembly comprises an air spring, an air chamber and an isolation valve, wherein the isolation valve is arranged between an air bag of the air spring and the air chamber and is used for controlling the connection and disconnection of the air bag and the air chamber; the isolating valve comprises a valve body provided with a valve port and a valve plate used for opening and closing the valve port, when the valve port is opened, the valve port is communicated with the air bag and the air chamber, and when the valve port is closed, the isolating valve separates the air bag and the air chamber.

Optionally, the air chamber is a rigid air chamber.

Optionally, the volume ratio of the air chamber to the air bag is not less than 1/4.

Optionally, a volume ratio of the air chamber and the air bag is not less than 2/3 and not more than 1.

Optionally, the valve plate includes a plurality of movable valve plate units.

Optionally, a linear guide structure is arranged between the valve plate units and the valve body to guide the valve plate units to move linearly along a plurality of radial directions of the valve port respectively.

Optionally, the valve body is provided with a plurality of strip-shaped guide grooves, the length of each strip-shaped guide groove extends along a plurality of radial directions of the valve port, the valve plate units are all provided with guide portions, and the guide portions are matched with the strip-shaped guide grooves respectively to form a plurality of linear guide structures respectively.

Optionally, the isolation valve further comprises a linkage ring, a plurality of pushing structures are arranged between the valve plate units and the linkage ring, and the plurality of pushing structures are used for respectively pushing the valve plate units when the linkage ring rotates, so that the valve plate units respectively linearly move along a plurality of radial directions of the valve port.

Optionally, be provided with many bar promotion grooves on the link ring, many the length in bar promotion groove all follows the gradual inwards or outwards slope of a direction of the circumference of valve port extends, the multi-disc all be provided with cooperation portion on the valve block unit, it is a plurality of cooperation portion respectively with many the cooperation of bar promotion groove is in order to constitute respectively a plurality ofly promote the structure.

Optionally, the valve plate units are sequentially arranged in the circumferential direction of the valve port, one of the two splicing edges between two adjacent valve plate units is provided with a first sealing groove, the other of the two splicing edges between two adjacent valve plate units is provided with a first sealing part, and when the valve port is closed, the first sealing part is embedded with the corresponding first sealing groove to form sealing.

Optionally, the first seal groove is a V-shaped groove, and the first seal portion is provided as a wedge-shaped structure matching the shape of the first seal groove.

Optionally, the air spring assembly further includes a damper, the valve body surrounds the periphery of the damper, and a gap between the valve body and the damper forms the valve port.

Optionally, a sealing ring is sleeved on the shock absorber, a second sealing groove is formed in the outer side face of the sealing ring, second sealing portions are arranged on the edges, close to the sealing ring, of the valve plate units, and when the valve port is closed, the second sealing portions are embedded into the second sealing groove to form sealing.

Optionally, the second sealing groove is a V-shaped groove, and the plurality of second sealing portions are all arranged in a wedge-shaped structure matched with the shape of the second sealing groove.

Optionally, an air chamber shell is fixedly connected to the periphery of the shock absorber, and the air chamber is enclosed by the air chamber shell and the outer wall of the shock absorber.

Optionally, the isolation valve is mounted at an upper end of the plenum housing.

Optionally, a driving motor for driving the isolation valve to open and close is arranged in the air chamber.

The automobile comprises the air spring assembly and a controller for controlling the isolation valve to open and close.

The rigidity of the air spring assembly can be changed, so that different requirements of braking working conditions, steering working conditions and straight-going working conditions on the rigidity of the air spring are better considered, and the comfort and the maneuverability of the whole vehicle are improved; according to the invention, through reasonably arranging the structures of the air chamber and the isolation valve, the rigidity of the air spring assembly can be rapidly changed, so that the response speed of the air spring assembly can meet the requirements of roll and pitch control.

Drawings

FIG. 1 is a schematic diagram of an air spring assembly according to an exemplary embodiment;

FIG. 2 is a schematic diagram of components of an isolation valve according to an embodiment;

FIG. 3 is a cross-sectional view of an isolation valve according to an embodiment;

FIG. 4 is a schematic structural diagram of a base according to an embodiment;

FIG. 5 is a schematic structural diagram of a valve plate unit according to an embodiment;

FIG. 6 is a schematic view of a linkage ring according to one embodiment;

FIG. 7 is a second exemplary illustration of a linkage ring according to the present invention;

FIG. 8 is a schematic closing diagram of an isolation valve according to an embodiment;

FIG. 9 is a schematic diagram of an embodiment of an isolation valve open;

FIG. 10 is a schematic diagram of the structure of the motor assembly and the coupling ring in accordance with an embodiment;

FIG. 11 is a schematic structural view of a seal ring according to an embodiment;

FIG. 12 is a schematic view of the sealing ring and the valve plate unit according to the embodiment;

FIG. 13 is a schematic view of the installation of the motor assembly according to the embodiment;

FIG. 14 is a schematic view of the installation of the seal described in the embodiments.

In the figure: 1-a shock absorber; 2, mounting a base; 3, air bags; 4, an air chamber shell; 5-an isolation valve; 6, a motor component; 7-air sac cavity; 8-air chamber cavity;

51-a pressing ring; 52-a base; 53-valve plate unit; 54-a linkage ring; 55, sealing rings;

41-upper end face; 42-a wire harness via; 43-step surface;

511-pressing ring body; 512-pressing ring inner flange; 513-pressing ring central hole;

521-a strip-shaped guide groove; 522-central hole of base;

531-a guide; 532-mating part; 533-second seal; 534-first sealing part; 535 — a first seal groove;

541-bar pushing groove; 542-inner gear ring; 543-linkage ring central hole;

551-second seal groove;

61-driving motor; 62-gear; 63-mounting a bracket; 64-a wire harness; 65-sealing member.

Detailed Description

The invention will be further explained with reference to the drawings.

An air spring assembly as shown in fig. 1 comprises an air spring, an air chamber and an isolation valve 5, wherein the isolation valve 5 is arranged between an air bag 3 and the air chamber of the air spring, and the isolation valve 5 is used for controlling the on-off of the air bag 3 and the air chamber; the isolation valve 5 includes a valve body provided with a valve port that communicates the airbag 3 and the air chamber when the valve port is opened, and a valve sheet for opening and closing the valve port, and the isolation valve 5 isolates the airbag 3 and the air chamber when the valve port is closed.

By adopting the technical scheme, the air chamber is additionally arranged, and the isolating valve 5 is utilized to control the connection and disconnection of the air bag 3 and the air chamber. When the automobile is in a straight-line running working condition, the control isolation valve 5 is opened, the air bag 3 is communicated with the air chamber, the air bag cavity 7 in the air bag 3 and the air chamber cavity 8 in the air chamber play a role of an air spring together, the air spring is in a low-rigidity state, and the coupling of road vibration and impact to the automobile body can be reduced. When the automobile is in a steering or braking working condition, the control isolation valve 5 is closed, the air chamber is isolated, only the air bag cavity 7 in the air bag 3 plays a role of an air spring, the air spring is in a high-rigidity state, and the side inclination or the longitudinal inclination of the automobile can be reduced. The time of the rolling or pitching process is short, the volume change of the air bag 3 can be regarded as an adiabatic process, according to the gas state equation, when the wheel jumps by the same stroke (namely, the air bag 3 changes by the same volume), the air pressure change range inside the air bag 3 is larger than that when the air bag 3 is communicated with the air chamber, the spring force change range is also larger, and the anti-rolling moment obtained by the same angle of the vehicle body rolling is also larger. During specific design, different rigidity increasing characteristics can be obtained by adjusting the volume ratio of the air chamber to the air bag 3, and the scheme of the low-rigidity passive stabilizer bar and the air spring is realized or the stabilizer bar is completely replaced.

In the technical scheme, the valve plate type isolating valve 5 is adopted to control the on-off of the air bag 3 and the air chamber, a valve port with a large opening size can be realized, the length of the valve port in the airflow flowing direction is small, the quick on-off of the valve port can be realized, the quick and sufficient communication between the air bag 3 and the air chamber can be realized, the valve port can be quickly closed under the steering or braking working condition, the quick adjustment of the rigidity of the air spring assembly is realized, the active control and the instant control of the roll and the pitch of the automobile can be favorably realized, and the response speed of the rigidity adjustment of the air spring assembly can meet the requirements of the roll and pitch control of the automobile. On the other hand, because the opening size of the valve port is larger, the length of the valve port in the airflow flowing direction is very small, when the valve port is opened, airflow can smoothly pass through the valve port, the damping effect and abnormal sound can be prevented, and the improvement of the automobile comfort of the air spring assembly in a low-rigidity state is facilitated.

In some embodiments, the plenum is a rigid gas. After the rigid air chamber is communicated with the air bag 3, the air pressure change amplitude inside the air bag 3 can be reduced; after the rigid air chamber is separated from the air bag 3, the rigid air chamber cannot deform and cannot play a role of an air spring, and only the air bag cavity 7 in the air bag 3 plays a role of the air spring at the moment, namely the rigid air chamber is adopted to facilitate quick and large-amplitude change of the rigidity of the air spring assembly.

In some embodiments, the volume ratio of the air chamber and the air bag 3 is not less than 1/4. By adopting the valve plate type isolation valve 5, the rapid and large-flow gas circulation between the air bag 3 and the air chamber can be realized, and the possibility of arranging the air chamber with larger volume is provided. As a preferred embodiment, through specific experimental verification, by adopting the valve plate type isolation valve provided by the application, the volume ratio of the air chamber and the air bag 3 can be set to be not less than 2/3, and when the volume ratio of the air chamber and the air bag 3 is set to be 2/3, the rigidity of the air spring assembly after the isolation valve is closed can be 1.7 times of the rigidity of the air spring assembly before the isolation valve is closed. In practice, the volume ratio of the air chamber to the air bag 3 is usually set to not more than 1, and when the volume ratio of the air chamber to the air bag 3 is 1, the ratio of the rigidity of the air spring assembly after closing the isolation valve to the rigidity of the air spring assembly before closing the isolation valve is more than 1.7.

In some embodiments, as shown in fig. 2, the valve sheet includes a plurality of movable valve sheet units 53, the valve sheet is formed by using the plurality of valve sheet units 53, and the plurality of valve sheet units 53 respectively move a small distance to control the opening and closing of the valve port, which is beneficial to increasing the response speed of the isolation valve 5 and reducing the volume of the isolation valve 5.

In some embodiments, as shown in fig. 2, 3, 4 and 5, a linear guide structure is disposed between the valve sheet units 53 and the valve body to guide the valve sheet units 53 to move linearly along a plurality of radial directions of the valve port, respectively. Through setting up sharp guide structure, can accurate control multi-disc valve block unit 53's moving path, be favorable to guaranteeing isolation valve 5's performance, also provide the basis for the linkage of multi-disc valve block unit 53.

In some embodiments, as shown in fig. 2, 3, 4 and 5, the valve body is provided with a plurality of bar-shaped guide grooves 521 having lengths extending in a plurality of radial directions of the valve port, respectively, the plurality of valve sheet units 53 are provided with guide portions 531, and the plurality of guide portions 531 cooperate with the plurality of bar-shaped guide grooves 521, respectively, to form a plurality of linear guide structures. As a specific example, the guide part 531 on the valve sheet unit 53 is a rectangular parallelepiped or cubic protrusion provided on the valve sheet unit 53. As a preferred embodiment, a plurality of strip-shaped guide grooves 521 are arranged at equal intervals in the circumferential direction of the valve port.

In some embodiments, as shown in fig. 2, 3, 5, 6 and 7, the isolation valve 5 further includes a linkage ring 54, and pushing structures are disposed between the valve sheet units 53 and the linkage ring 54, and the pushing structures are configured to push the valve sheet units 53 respectively when the linkage ring 54 rotates, so that the valve sheet units 53 respectively move linearly along a plurality of radial directions of the valve port. By providing the coupling ring 54, the plurality of sheet valve units 53 can share one drive motor 61.

In some embodiments, as shown in fig. 2, 3, 5, 6 and 7, a plurality of strip-shaped pushing grooves 541 are disposed on the linkage ring 54, lengths of the strip-shaped pushing grooves 541 gradually extend inward along one circumferential direction of the valve port, or lengths of the strip-shaped pushing grooves 541 gradually extend outward along one circumferential direction of the valve port, and engaging portions 532 are disposed on the valve sheet units 53, and the engaging portions 532 are respectively engaged with the strip-shaped pushing grooves 541 to respectively form a plurality of pushing structures. When the linkage ring 54 rotates forwards, the strip-shaped pushing groove 541 can apply pushing force to the matching part 532, the valve sheet unit 53 is pushed to move along one direction of the corresponding strip-shaped guide groove 521, when the linkage ring 54 rotates backwards, the strip-shaped pushing groove 541 can apply pushing force to the matching part 532, the valve sheet unit 53 is pushed to move along the other direction of the corresponding strip-shaped guide groove 521, and therefore the valve sheet unit 53 is controlled to move back and forth along the strip-shaped guide groove 521. As a specific example, the fitting portion 532 is a cylindrical protrusion provided on the valve sheet unit 53. In specific implementation, by reasonably designing the radial span and the circumferential span at the two ends of the strip-shaped pushing groove 541, the required opening and closing speed of the valve sheet unit 53 can be obtained.

In some embodiments, as shown in fig. 5, 8 and 9, the plurality of valve sheet units 53 are sequentially arranged in the circumferential direction of the valve port, one splicing edge of two splicing edges for splicing with each other between two adjacent valve sheet units 53 is provided with a first sealing groove 535, the other splicing edge of two splicing edges for splicing with each other between two adjacent valve sheet units 53 is provided with a first sealing portion 534, and when the valve port is closed, the first sealing portion 534 is embedded with the corresponding first sealing groove 535 to form a seal. The sealing performance between the valve sheet units 53 can be improved by arranging the first sealing portion 534 and the first sealing groove 535, which is beneficial to improving the capability of the valve sheet for separating the air bag 3 and the air chamber when the valve port is closed.

In some embodiments, first seal groove 535 is a V-shaped groove and first seal 534 is provided in a wedge-shaped configuration that matches the shape of first seal groove 535. By properly arranging the shapes of the first sealing groove 535 and the first sealing part 534, when the pressure difference exists between the upper surface and the lower surface of the valve plate, the inclined surface of the first sealing groove 535 and the inclined surface of the first sealing part 534 are pressed tightly, and good sealing can be formed.

In some embodiments, as shown in figures 1, 8 and 9, the air spring assembly further comprises a shock absorber 1, a valve body surrounding the periphery of the shock absorber 1, and a gap between the valve body and the shock absorber 1 forming the valve port. Through setting up shock absorber 1, be favorable to reducing the degree of difficulty of arranging of air chamber. It should be apparent that in other embodiments, the air spring assembly may be provided without shock absorber 1.

In some embodiments, as shown in fig. 8, 9, 11 and 12, the damper 1 is sleeved with a sealing ring 55, an outer side surface of the sealing ring 55 is provided with a second sealing groove 551, edges of the valve plate units 53 close to the sealing ring 55 are provided with second sealing portions 533, and when the valve port is closed, the second sealing portions 533 are embedded in the second sealing groove 551 to form a seal. Through setting up sealing washer 55, can promote the sealing performance between valve plate unit 53 and shock absorber 1 on the one hand, on the other hand, sealing washer 55 can play the effect of buffering to multi-disc valve plate unit 53, is favorable to noise abatement and guarantees valve plate unit 53's life.

In some embodiments, as shown in fig. 8, 9, 11 and 12, second seal groove 551 is a V-shaped groove, and each of the plurality of second seal portions 533 is provided as a wedge-shaped structure matching the shape of second seal groove 551. By reasonably setting the shapes of the second sealing groove 551 and the second sealing portion 533, when the pressure difference exists between the upper and lower surfaces of the valve plate, the inclined surface of the second sealing groove 551 and the inclined surface of the second sealing portion 533 are pressed tightly, so that good sealing can be formed.

In some embodiments, as shown in fig. 1, an air chamber housing 4 is fixedly connected to the periphery of the shock absorber 1, and the air chamber housing 4 and the outer wall of the shock absorber 1 enclose an air chamber. Arranging the air chamber at the periphery of the shock absorber 1 can save space on the one hand and is beneficial to realizing the direct connection of the air chamber and the air bag 3 on the other hand.

In one embodiment, the air chamber housing 4 is made of a rigid material, and the air chamber housing 4 and the shock absorber 1 enclose a rigid air chamber, and the air bag 3 can be supported by the rigid air chamber housing 4.

In a specific embodiment, as shown in fig. 1, the shock absorber 1 includes a shock absorber cylinder, a shock absorber piston rod and an upper mounting seat 2, the upper mounting seat 2 is connected to the upper end of the shock absorber piston rod, the lower end of the air chamber housing 4 is welded to the periphery of the shock absorber cylinder, the upper end of the air bag 3 is connected to the periphery of the upper mounting seat 2, the lower end of the air bag 3 is connected to the periphery of the upper end of the air chamber housing 4, and the lower end of the air bag 3 is directly connected to the upper end of the air chamber housing 4, which is beneficial to increasing the response speed of the air spring assembly for adjusting the stiffness.

In some embodiments, as shown in FIG. 1, an isolation valve 5 is mounted at the upper end of the plenum housing 4. Specifically, as shown in fig. 1 to 12, the isolation valve 5 includes the above valve body, a plurality of valve sheet units 53 and a linkage ring 54, the valve body includes a pressing ring 51 and a base 52, a plurality of strip-shaped guide grooves 521 are all disposed on the base 52, the pressing ring 51 includes a pressing ring body 511 fixedly connected to the periphery of the upper end portion of the air chamber housing 4 and a pressing ring inner flange 512 disposed inside the pressing ring body 511, the connection between the pressing ring body 511 and the air chamber housing 4 may be a threaded connection, an interference fit press fitting, a welding connection, and the like, the base 52 is clamped between the pressing ring inner flange 512 and the upper end surface 41 of the air chamber housing 4, a step surface 43 for supporting the linkage ring 54 is disposed in the air chamber housing 4, the linkage ring 54 is rotatably supported on the step surface 43, and the plurality of valve sheet units 53 are movably clamped between the lower side surface of the base 52 and the upper side surface of the linkage ring 54. As a preferred embodiment, the pressing ring 51, the base 52 and the linkage ring 54 are all in a ring structure, the pressing ring 51 encloses a pressing ring center hole 513, the base 52 encloses a base center hole 522, the linkage ring 54 encloses a linkage ring center hole 543, the pressing ring center hole 513, the base center hole 522 and the linkage ring center hole 543 form a valve port, and the valve sheet units 53 extend into the valve port and are spliced together to close the valve port; the multi-sheet valve sheet unit 53 exits the valve port and can open the valve port. It should be noted that, this application is through the structure, the straight line guide structure and the promotion structure of rationally setting up multi-disc valve block unit 53 for multi-disc valve block unit 53 opens and closes the valve port along a plurality of radial direction rectilinear movement of valve port respectively, guaranteed on the one hand can be quick open and close the valve port, on the other hand provides convenience for setting up seal structure between valve block unit 53, provide convenience for setting up seal structure between valve block unit 53 and shock absorber 1, can prevent to interfere between valve block unit 53 and shock absorber 1.

In some embodiments, as shown in fig. 1 and 13, a driving motor 61 for driving the isolation valve 5 to open and close is arranged in the gas chamber, and the driving motor 61 may be a servo motor. In practical implementation, the driving motor 61 may be fixedly installed in the air chamber 8 through a mounting bracket 63, the mounting bracket 63 may be welded to the damper, the gear 62 is installed on the output shaft of the driving motor 61, an internal gear 542 is provided on the linkage ring 54, as shown in fig. 10, the gear 62 is engaged with the internal gear 542, and the driving motor 61 drives the linkage ring 54 to rotate forward and backward, thereby driving the isolation valve 5 to open and close. As shown in fig. 14, the wiring harness 64 of the driving motor 61 may pass through the air chamber housing 4 through the wiring harness through hole 42 on the air chamber housing 4, a sealing member 65 may be provided on the wiring harness 64 and the wiring harness through hole 42, and the sealing member 65 may be a glue plug. The drive motor 61, the gear 62, the mounting bracket 63, the wire harness 64, and the seal 65 constitute the motor assembly 6.

In some embodiments, the material of gear 62 is nylon to reduce vibration and moment of inertia.

In some embodiments, the material of the valve plate unit 53 is nylon, so as to reduce inertia of the valve plate unit 53 and impact when the valve plate unit 53 is opened and closed, and improve response speed.

In some embodiments, grease is applied to the surfaces of the valve plate unit 53 and the coupling ring 54, so that friction can be reduced and noise can be eliminated.

An automotive vehicle of the present invention includes an air spring assembly according to any of the above and a controller for controlling the opening and closing of the isolation valve 5. The controller is connected with a CAN line of the automobile, automobile operation information is collected through the CAN line of the automobile, the automobile operation information comprises but is not limited to a vehicle speed signal, a steering wheel turning angle signal, a vehicle braking deceleration signal, a vehicle lateral acceleration signal and a brake lamp switch signal, the controller converts a calculation and comparison result into an angular displacement signal on an output shaft of the servo motor to control the rotation of the servo motor through calculation and comparison of all signals and all prestored threshold values, and the opening and closing state of the isolation valve 5 is judged through monitoring the angular signal of the servo motor. Specifically, the controller can acquire the lateral acceleration of the automobile, and the controller can acquire the braking deceleration of the automobile; the controller can respond to the lateral acceleration of the automobile being larger than or equal to a preset lateral acceleration threshold value, and control the isolation valve 5 to be closed so as to disconnect the air bag 3 from the air chamber; the controller can respond to the brake deceleration of the automobile being larger than or equal to a preset brake deceleration threshold value, and control the isolation valve 5 to close so as to disconnect the air bag 3 from the air chamber; after controlling the isolation valve 5 to close, the controller can monitor the steering wheel angle and the stop lamp status of the vehicle, and in response to the steering wheel angle being less than a preset steering wheel angle threshold and the stop lamp status being off, the controller can control the isolation valve 5 to open to communicate the airbag 3 with the air chamber.

In a particular embodiment, a controller includes at least one processor and at least one memory coupled to the at least one processor, the memory having stored therein instructions executable by the at least one processor, the instructions when executed by the at least one processor performing the steps of: acquiring the lateral acceleration of the automobile and the braking deceleration of the automobile; in response to the lateral acceleration of the automobile being greater than or equal to a preset lateral acceleration threshold, controlling the isolation valve 5 to close so as to disconnect the airbag 3 from the air chamber; in response to the brake deceleration of the automobile being greater than or equal to a preset brake deceleration threshold, controlling the isolation valve 5 to close to disconnect the air bag 3 from the air chamber; after the control isolation valve 5 is closed, the steering wheel angle and the stop lamp state of the automobile are monitored, and in response to the steering wheel angle being less than a preset steering wheel angle threshold and the stop lamp state being closed, the control isolation valve 5 is opened to communicate the airbag 3 with the air chamber.

By adopting the scheme, the opening and closing of the isolating valve 5 are both at the beginning and after the end of the roll and pitch of the whole vehicle, so that the pressure difference between the upper surface and the lower surface of the valve plate unit 53 is avoided during the opening and closing, the flexible opening and closing response of the valve plate unit 53 can be ensured, the action is reliable, and convenience is provided for adopting the valve plate type isolating valve 5.

In the description of the specification, references to the description of "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Claims

1. An air spring assembly is characterized by comprising an air spring, an air chamber and an isolation valve, wherein the isolation valve is arranged between an air bag of the air spring and the air chamber and is used for controlling the on-off of the air bag and the air chamber; the isolating valve comprises a valve body provided with a valve port and a valve plate used for opening and closing the valve port, when the valve port is opened, the valve port is communicated with the air bag and the air chamber, and when the valve port is closed, the isolating valve separates the air bag and the air chamber.

2. The air spring assembly of claim 1, wherein said air chamber is a rigid air chamber.

3. The air spring assembly of claim 2, wherein the volume ratio of said air chamber to said air bag is not less than 1/4.

4. The air spring assembly of claim 3, wherein the volume ratio of said air chamber to said air bag is not less than 2/3 and not greater than 1.

5. The air spring assembly of claim 1, wherein said valve member includes a plurality of movable valve member units.

6. The air spring assembly of claim 5, wherein a linear guide structure is disposed between each of the plurality of valve plate units and the valve body to guide each of the plurality of valve plate units to move linearly in a plurality of radial directions of the valve port.

7. The air spring assembly according to claim 6, wherein the valve body is provided with a plurality of strip-shaped guide grooves having lengths extending in a plurality of radial directions of the valve port, and each of the plurality of valve plate units is provided with a guide portion, and the plurality of guide portions are respectively engaged with the plurality of strip-shaped guide grooves to form a plurality of linear guide structures.

8. The air spring assembly according to claim 6, wherein the isolation valve further comprises a linkage ring, and a plurality of pushing structures are disposed between the valve plate units and the linkage ring, and are configured to push the valve plate units respectively when the linkage ring rotates, so that the valve plate units respectively move linearly in a plurality of radial directions of the valve port.

9. The air spring assembly according to claim 8, wherein the linking ring is provided with a plurality of strip-shaped pushing grooves, the lengths of the strip-shaped pushing grooves gradually extend inwards or outwards along one circumferential direction of the valve port, and each of the plurality of valve plate units is provided with an engaging portion, and the engaging portions are respectively engaged with the strip-shaped pushing grooves to respectively form the plurality of pushing structures.

10. The air spring assembly according to claim 5, wherein the valve plate units are sequentially arranged in the circumferential direction of the valve port, one of the two splicing edges between two adjacent valve plate units is provided with a first sealing groove, the other splicing edge between two adjacent valve plate units is provided with a first sealing portion, and when the valve port is closed, the first sealing portion is embedded with the corresponding first sealing groove to form a seal.

11. The air spring assembly of claim 10, wherein said first seal groove is a V-shaped groove and said first seal portion is provided as a wedge shaped structure matching the shape of said first seal groove.

12. The air spring assembly of claim 5 further comprising a damper, said valve body surrounding a periphery of said damper, a gap between said valve body and said damper constituting said valve port.

13. The air spring assembly according to claim 12, wherein a sealing ring is sleeved on the damper, a second sealing groove is formed in an outer side surface of the sealing ring, second sealing portions are respectively formed at edges of the valve plate units close to one side of the sealing ring, and when the valve port is closed, the second sealing portions are respectively embedded into the second sealing groove to form sealing.

14. The air spring assembly of claim 13, wherein said second seal groove is a V-shaped groove, and wherein said second seal portions are each configured as a wedge-shaped structure matching the shape of said second seal groove.

15. The air spring assembly of claim 12 wherein a plenum housing is fixedly attached about the periphery of said shock absorber, said plenum housing and the outer wall of said shock absorber enclosing said plenum.

16. The air spring assembly of claim 15, wherein said isolation valve is mounted to an upper end of said air chamber housing.

17. The air spring assembly of claim 1, wherein a drive motor is disposed within said air chamber for driving said isolation valve open and closed.

18. An automotive vehicle comprising an air spring assembly according to any one of claims 1-17 and a controller for controlling the opening and closing of said isolation valve.