Air suspension height adjustment method, vehicle and storage medium

Abstract

The application relates to the technical field of automobile driving, and discloses an air suspension height adjusting method, a vehicle and a storage medium, the method comprising the following steps: acquiring driving information in real time, and acquiring a road surface flatness parameter representing the current road surface flatness of the vehicle, wherein the driving information comprises a current vehicle speed; and dynamically adjusting the height of air suspension according to the current vehicle speed and the road surface flatness parameter. It can be seen that in the process of dynamically adjusting the height of air suspension, the current vehicle speed and the road surface flatness of the vehicle are fully considered, and the safety of the vehicle when running on a poor road surface can be greatly improved.

Description

Technical Field

[0001] This invention relates to the field of automotive driving technology, and more particularly to an air suspension height adjustment method, a vehicle, and a storage medium. Background Technology

[0002] During vehicle driving, adjusting the vehicle's suspension height can increase the vehicle's stability or improve its ability to navigate complex road conditions.

[0003] Currently, vehicle suspension is mainly adjusted by the driver actively changing the driving mode or by adjusting the suspension height according to the vehicle's speed. However, when navigating complex road conditions, there is a risk that the driver may not adjust the driving mode in time, resulting in a low suspension height, or the suspension may automatically lower due to excessive speed, posing a risk of impacting the chassis and leading to lower safety during vehicle operation. Summary of the Invention

[0004] This invention provides an air suspension height adjustment method, a vehicle, and a storage medium to address the issue of low safety in existing vehicle suspension height adjustment methods.

[0005] An air suspension height adjustment method, the method comprising:

[0006] Real-time acquisition of driving information and road surface smoothness parameters characterizing the current road surface smoothness of the vehicle, wherein the driving information includes the current vehicle speed;

[0007] The height of the air suspension is dynamically adjusted based on the current vehicle speed and road surface smoothness parameters.

[0008] Preferably, in the above method, the step of dynamically adjusting the height of the air suspension based on the current vehicle speed and road surface smoothness parameters includes:

[0009] If the road surface smoothness parameter is less than the first parameter threshold or greater than the second parameter threshold, the target height level of the air spring is controlled according to the current vehicle speed.

[0010] If the road surface smoothness parameter is between the first parameter threshold and the second parameter threshold, maintain the current target height level of the air spring.

[0011] In the above method, preferably, when the road surface smoothness parameter is less than the first parameter threshold, the step of controlling the target height level of the air spring according to the current vehicle speed includes:

[0012] In the first preset driving mode, the target height level of the air spring is controlled to switch between the corresponding height levels in the first preset driving mode according to the change in the current vehicle speed.

[0013] In the second preset driving mode, the target height level of the air spring is controlled to be the height level corresponding to the second preset driving mode.

[0014] In the above method, preferably, when the road surface smoothness parameter is greater than the second parameter threshold, the step of controlling the target height level of the air spring according to the current vehicle speed includes:

[0015] In the first preset driving mode, based on the change in the current vehicle speed, the target height level of the air spring is controlled to be increased only within the height level range corresponding to the first preset driving mode.

[0016] In the second preset driving mode, the target height level of the air spring is controlled to be the corresponding height level in the second preset driving mode.

[0017] The preferred method described above is:

[0018] The first preset driving mode includes a first driving mode and a second driving mode. The altitude level corresponding to the first driving mode includes a first altitude level, a second altitude level and a third altitude level. The altitude level corresponding to the second driving mode includes a second altitude level and a third altitude level.

[0019] The second preset driving mode includes a third driving mode, and the altitude level corresponding to the third driving mode includes a third altitude level;

[0020] The air spring height corresponding to the first height level is greater than the air spring height corresponding to the second height level, and the air spring height corresponding to the second height level is greater than the air spring height corresponding to the third height level.

[0021] Preferably, in the above method, controlling the target height level of the air spring to switch between the corresponding height levels in the first preset driving mode based on the change in the current vehicle speed includes:

[0022] If the current vehicle speed is less than the first speed threshold, adjust the height level of the air spring to the first height level;

[0023] If the current vehicle speed is greater than a first speed threshold, determine whether the current vehicle speed is less than a second speed threshold; the second speed threshold is greater than the first speed threshold.

[0024] If the current vehicle speed is less than the second speed threshold, adjust the height level of the air spring to the second height level;

[0025] If the current vehicle speed is greater than the second speed threshold, adjust the height level of the air spring to the third height level.

[0026] Preferably, in the above method, controlling the target height level of the air spring to be increased only within the height level range corresponding to the first preset driving mode based on the change in the current vehicle speed includes:

[0027] If the current vehicle speed is less than the first speed threshold, and the current height level of the air spring is the second or third height level, adjust the height level of the air spring to the first height level.

[0028] If the current vehicle speed is greater than the first speed threshold, determine whether the current vehicle speed is less than the second speed threshold;

[0029] If the current vehicle speed is less than the second speed threshold, when the current height level of the air spring is the third height level, adjust the current height level of the air spring to the second height level;

[0030] If the vehicle's current speed is greater than the second speed threshold, maintain the current height level of the air spring.

[0031] Preferably, in the above method, obtaining the road surface smoothness parameters characterizing the current road surface smoothness of the vehicle includes:

[0032] The vehicle's raw acceleration signal is acquired in real time, and the raw acceleration signal is obtained by superimposing acceleration signals of different frequencies;

[0033] Each acceleration signal is preprocessed to obtain the preprocessed values ​​of the road surface smoothness parameters corresponding to each acceleration signal;

[0034] The preprocessed values ​​of the road surface smoothness parameters are subjected to high-frequency signal filtering to obtain the road surface smoothness parameters.

[0035] An air suspension includes a controller and an air spring, the controller controlling the air spring to achieve the air suspension height adjustment method described above.

[0036] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the air suspension height adjustment method described above.

[0037] In summary, this invention discloses an air suspension height adjustment method, a vehicle, and a storage medium. By acquiring driving information, including the vehicle's current speed, and road surface smoothness parameters characterizing the smoothness of the road surface, the method dynamically adjusts the air suspension height based on the current speed and road surface smoothness parameters. Therefore, this invention fully considers both the vehicle's current speed and the road surface smoothness during the dynamic adjustment of the air suspension height, significantly improving vehicle safety when driving on rough roads. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart illustrating the implementation of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0040] Figure 2 This is a partial flowchart of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0041] Figure 3 This is a partial flowchart of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0042] Figure 4 This is a partial flowchart of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0043] Figure 5 This is a partial flowchart of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0044] Figure 6 This is a partial flowchart of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the adjustment logic of an air suspension disclosed in an embodiment of the present invention;

[0046] Figure 8 This is a partial flowchart of an air suspension height adjustment method disclosed in an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of another adjustment logic for an air suspension disclosed in an embodiment of the present invention;

[0048] Figure 10This is a schematic diagram of an air suspension structure disclosed in an embodiment of the present invention;

[0049] Figure 11 This is a schematic diagram of the structure of an air suspension height adjustment device disclosed in an embodiment of the present invention. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0052] It should also be understood that the term “and / or” as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0053] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0054] Furthermore, in the description of this invention and the appended claims, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0055] In this specification, references such as "one embodiment" or "some embodiments" mean that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Thus, the phrase "in one embodiment" appears differently throughout this specification.

[0056] The terms "in some embodiments," "in other embodiments," and "in still other embodiments" do not necessarily refer to the same embodiments, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0057] This invention discloses an air suspension height adjustment method, a vehicle, and a storage medium. By acquiring driving information, including the vehicle's current speed, and road surface smoothness parameters characterizing the smoothness of the road surface, the method dynamically adjusts the air suspension height based on the current speed and road surface smoothness parameters. Therefore, this invention fully considers the vehicle's current speed and road surface smoothness during the dynamic adjustment of the air suspension height, which can greatly improve vehicle safety when driving on poor road conditions. Specific embodiments are described below.

[0058] like Figure 1 The diagram shown is a flowchart of an air suspension height adjustment method disclosed in this invention. This method is applicable to vehicles equipped with air suspension. The method in this embodiment specifically includes the following steps:

[0059] S101: Real-time acquisition of driving information and road surface smoothness parameters that characterize the current road surface smoothness of the vehicle.

[0060] The driving information includes the current vehicle speed. For example, in this embodiment, the current vehicle speed can be obtained through a vehicle speed sensor installed on the vehicle, or it can be calculated using the vehicle's tire rotation speed and tire diameter. This embodiment does not limit the method for obtaining the current vehicle speed.

[0061] Furthermore, in this embodiment, road surface smoothness parameters characterizing the smoothness of the road surface under current driving conditions can be calculated by acquiring the acceleration signal of the air spring position during vehicle operation. Specifically, this can include the following steps: Figure 2 As shown:

[0062] S201: Acquire the vehicle's raw acceleration signal in real time.

[0063] The original acceleration signal is obtained by superimposing acceleration signals of different frequencies.

[0064] Specifically, in this embodiment, an acceleration sensor can be installed below the air springs of the vehicle's air suspension to collect the acceleration signals of the vehicle's tires in real time. During vehicle operation, the tires are affected by the smoothness of the road surface; therefore, the acceleration signals collected by the acceleration sensor reflect the changes in tire height during vehicle operation.

[0065] S202: Preprocess each acceleration signal separately to calculate the preprocessed values ​​of the road surface smoothness parameters corresponding to each acceleration signal.

[0066] In this embodiment, upon receiving the acceleration signal for the target duration, preprocessing is performed on the acceleration signal for that target duration to obtain preprocessed values ​​for road surface smoothness parameters. In other words, after each target duration, preprocessing is performed on each acceleration signal collected within that target duration to obtain preprocessed values ​​for the road surface smoothness parameters corresponding to each acceleration signal.

[0067] Each acceleration signal is preprocessed to calculate the preprocessed values ​​of the road surface smoothness parameters corresponding to each acceleration signal, including:

[0068] Each acceleration signal is sampled to obtain a preset number of acceleration values. Then, based on all the collected acceleration values, the preprocessed values ​​of the road surface smoothness parameters corresponding to each acceleration signal are calculated.

[0069] For example, taking a target duration of 10 seconds as an example, in the time domain, the acceleration signal is sampled once every 1 second to obtain 10 acceleration values. Then, the 10 acceleration values ​​are input into the formula for calculating the preprocessed values ​​of road surface smoothing parameters to obtain the preprocessed values ​​of road surface smoothing parameters.

[0070] The formula for calculating the preprocessed values ​​of road surface smoothing parameters is as follows:

[0071]

[0072] Among them, a1, a2...a i These are i acceleration values, and x is the preprocessed value of the road surface smoothing parameters.

[0073] S203: High-frequency signal filtering is performed on the preprocessed values ​​of road surface smoothness parameters to obtain the road surface smoothness parameters.

[0074] In this specific implementation, a low-pass filter can be used to filter the high-frequency signal of the original acceleration signal to remove the high-frequency acceleration signal. The road surface smoothness index can then be obtained from the preprocessed values ​​of the road surface smoothness parameters. In other words, by filtering the high-frequency acceleration signal from the original acceleration signal, high-frequency filtering of the preprocessed values ​​of the road surface smoothness parameters is achieved. The high-frequency acceleration signal is filtered out by the low-pass filter, meaning the preprocessed values ​​of the road surface smoothness parameters corresponding to the high-frequency acceleration signal are filtered out. The unfiltered preprocessed values ​​of the road surface smoothness parameters are the road surface smoothness parameters.

[0075] It should be noted that in this embodiment, when a road surface smoothness parameter less than the first parameter threshold is obtained once, the subsequent step of adjusting the air suspension height can be performed based on the road surface smoothness parameter; or, when multiple road surface smoothness parameters less than the first parameter threshold are obtained consecutively, the subsequent step of adjusting the air suspension height can be performed based on the road surface smoothness parameter; or, when multiple road surface smoothness parameters greater than the second parameter threshold are obtained consecutively, the subsequent step of adjusting the air suspension height can be performed based on the road surface smoothness parameter. This embodiment does not impose specific limitations on these steps.

[0076] It should be understood that during vehicle operation, the wheel height will rise or fall with changes in road conditions. For example, if there are depressions in the road surface, the tire height will decrease, and if there are bumps in the road surface, the wheel height will increase. Therefore, by using an acceleration sensor installed under the air spring to collect the acceleration signal of the tire height change, the road surface smoothness index of the current road can be calculated based on the collected acceleration signal. This can effectively reflect the road conditions of the current road and provide a reference for subsequent air suspension height adjustment.

[0077] In summary, this embodiment effectively reflects the height change of the vehicle tires by collecting the acceleration signal under the air spring. Therefore, based on the collected acceleration signal, more reliable road surface smoothness parameters can be obtained, which is beneficial to improving the rationality of air suspension height adjustment.

[0078] S102: Dynamically adjusts the height of the air suspension based on the current vehicle speed and road surface smoothness parameters.

[0079] It should be understood that road surface smoothness parameters characterize the smoothness of the road surface on which the vehicle is currently driving. When the road surface smoothness parameter is small, it indicates that the smoothness of the road surface on which the vehicle is currently driving is good. When the road surface smoothness parameter is large, it indicates that the smoothness of the road surface on which the vehicle is currently driving is poor. Therefore, the height of the air suspension can be dynamically adjusted by using different adjustment methods according to the magnitude of the road surface smoothness parameter, so as to meet the needs of different road surface smoothness conditions for the air suspension height, thereby improving the driving safety of the vehicle.

[0080] Furthermore, step S102 above can be implemented based on the following steps, such as... Figure 3 As shown:

[0081] S301: If the road surface smoothness parameter is less than the first parameter threshold or greater than the second parameter threshold, control the target height level of the air spring according to the current vehicle speed.

[0082] S302: If the road surface smoothness parameter is between the first parameter threshold and the second parameter threshold, maintain the current target height level of the air spring.

[0083] Specifically, in this embodiment, a first parameter threshold and a second parameter threshold can be preset. Then, based on the first parameter threshold and the second parameter threshold, it is determined whether the height of the air suspension needs to be adjusted. That is, it is necessary to control the target height level of the air spring according to the current vehicle speed. By controlling the target height level of the air spring, the purpose of dynamically adjusting the height of the air suspension can be achieved.

[0084] It should be understood that when the road surface smoothness parameter is less than the first parameter threshold, the road surface smoothness of the vehicle's current driving is relatively good. Adjusting the air suspension height by controlling the target height level of the air spring according to the current vehicle speed helps improve vehicle stability. When the road surface smoothness parameter is greater than the second parameter threshold, the road surface smoothness of the vehicle's current driving is very poor. Adjusting the target height level of the air spring according to the current vehicle speed helps increase the vehicle's chassis height, which can prevent road obstacles from scraping the chassis. When the road surface smoothness parameter is between the first and second parameter thresholds, the road surface smoothness of the vehicle's current driving is poor. Maintaining the current target height level of the air spring, i.e., not adjusting the target height level of the air spring, allows the driver to only feel the bumps of the road surface, avoiding the double bumps caused by changes in road surface and air spring height, which helps improve the driver's driving experience.

[0085] When the road surface smoothness parameter is less than the first parameter threshold, controlling the target height level of the air spring based on the current vehicle speed includes the following steps: Figure 4 As shown:

[0086] S401: In the first preset driving mode, the target height level of the air spring is switched between the corresponding height levels in the first preset driving mode according to the change in the current vehicle speed.

[0087] S402: In the second preset driving mode, the target height level of the air spring is controlled to be the height level corresponding to the second preset driving mode.

[0088] Understandably, the first preset driving mode corresponds to multiple height levels. Therefore, the target height level of the air spring can be switched between the corresponding height levels in the first preset driving mode based on the current vehicle speed. The second preset driving mode, however, corresponds to only one height level. Therefore, in the second preset driving mode, it is only necessary to control the target height level of the air spring to the height level corresponding to the second preset driving mode.

[0089] In this context, each height level corresponding to the first preset driving mode and / or each height level corresponding to the second preset driving mode corresponds to a height of the air spring, i.e., the height of the air spring. In practice, the air spring can be automatically compressed or extended by an air compressor and an exhaust valve, thereby controlling the height level of the air spring.

[0090] It is important to note that when the road surface smoothness parameter is less than the first parameter threshold, it indicates that the road surface condition of the vehicle is currently driving on is good, such as on a highway. Therefore, the air spring can be freely switched between multiple height levels corresponding to the first preset driving mode according to the current vehicle speed. There is no need to consider the risk of obstacles scraping the chassis; the main consideration is vehicle stability. For example, at higher speeds, the height level of the air spring can be reduced to lower the vehicle chassis, which can improve vehicle stability and enhance driving safety.

[0091] When the road surface smoothness parameter is greater than the second parameter threshold, controlling the target height level of the air spring based on the current vehicle speed includes the following steps: Figure 5 As shown:

[0092] S501: In the first preset driving mode, the target height level of the air spring is controlled to be increased only within the height level range corresponding to the first preset driving mode, based on the change in the current vehicle speed.

[0093] S502: In the second preset driving mode, the target height level of the air spring is controlled to be the corresponding height level in the second preset driving mode.

[0094] Understandably, the first preset driving mode corresponds to multiple height levels. Therefore, the target height level of the air spring can be adjusted between the corresponding height levels in the first preset driving mode based on the current vehicle speed. The second preset driving mode, however, corresponds to only one height level. Therefore, in the second preset driving mode, it is only necessary to control the target height level of the air spring to the height level corresponding to the second preset driving mode.

[0095] It's important to note that when the road surface smoothness parameter exceeds the first threshold, it indicates that the road surface condition is poor, such as an uneven surface. Therefore, to prevent the vehicle's chassis from scraping, the air spring height rating must be increased based on vehicle speed, not decreased. Furthermore, due to the poor road conditions, high-speed driving is difficult; therefore, the primary concern should be preventing scraping of the chassis during driving, thus improving vehicle safety.

[0096] Furthermore, the first preset driving mode includes a first driving mode and a second driving mode. The altitude levels corresponding to the first driving mode include a first altitude level, a second altitude level, and a third altitude level, and the altitude levels corresponding to the second driving mode include a second altitude level and a third altitude level.

[0097] The second preset driving mode includes the third driving mode, and the corresponding altitude level under the third driving mode includes the third altitude level.

[0098] Among them, the air spring height corresponding to the first altitude level is greater than the air spring height corresponding to the second altitude level, and the air spring height corresponding to the second altitude level is greater than the air spring height corresponding to the third altitude level.

[0099] It should be understood that when the vehicle's driving mode is the first driving mode, the target height level of the air spring can be dynamically switched between the first, second, and third height levels, or sequentially increased, depending on the current vehicle speed; when the vehicle's driving mode is the second driving mode, the target height level of the air spring can be dynamically switched between the second and third height levels, or sequentially increased, depending on the current vehicle speed; when the vehicle's driving mode is the third driving mode, the target height level of the air spring can only be controlled to the third height level.

[0100] based on Figure 4 In its specific implementation, step S401 can be achieved through the following steps, such as... Figure 6 As shown:

[0101] S601: If the current vehicle speed is less than the first speed threshold, adjust the air spring height level to the first height level.

[0102] Specifically, if the air spring's height rating was at the second or third height rating before adjustment, then the air spring's height rating will be adjusted to the first height rating. If the air spring's height rating was already at the first height rating before adjustment, then no further adjustment will be made, and the process will end.

[0103] S602: If the current vehicle speed is greater than the first speed threshold, determine whether the current vehicle speed is less than the second speed threshold.

[0104] The second speed threshold is greater than the first speed threshold.

[0105] If the vehicle's current speed is less than the second speed threshold, proceed to step S603, which adjusts the air spring height level to the second height level; if the vehicle's current speed is greater than the second speed threshold, proceed to step S604, which adjusts the air spring height level to the third height level.

[0106] S603: Adjust the air spring height rating to the second height rating.

[0107] Specifically, if the air spring's height rating was at the first or third height rating before adjustment, then the air spring's height rating will be adjusted to the second height rating. If the air spring's height rating was already at the second height rating before adjustment, then no further adjustment will be made, and the process will end.

[0108] S604: Adjust the air spring height rating to the third height rating.

[0109] Specifically, if the air spring's height rating was at the second or first height rating before adjustment, then the air spring's height rating will be adjusted to the third height rating. If the air spring's height rating was already at the third height rating before adjustment, then no further adjustment will be made, and the process will end.

[0110] In summary, when the road surface smoothness parameter is less than the first parameter threshold, the air suspension adjustment logic is as follows: Figure 7As shown, where A represents the current vehicle speed, a1 represents the first speed threshold, a2 represents the second speed threshold, and a3 represents the third speed threshold, in the first driving mode, when the current vehicle speed is less than the first speed threshold, the air spring is adjusted from the second height level to the first height level; when the current vehicle speed is greater than the first speed threshold but less than the second speed threshold, the air spring is adjusted from the third height level to the second height level, or vice versa; when the current vehicle speed is greater than the second speed threshold, the air spring is adjusted from the second height level to the third height level; and so on. In the second driving mode, when the current vehicle speed is greater than the first speed threshold but less than the second speed threshold, the air spring is adjusted from the third height level to the second height level; and when the current vehicle speed is greater than the second speed threshold, the air spring is adjusted from the second height level to the third height level. In the second driving mode, since there is only one height level, there is no need to adjust the air spring height level. Additionally, when a user actively switches driving modes, if the height level corresponding to the new driving mode includes the air spring height level of the previous driving mode, then there is no need to switch the height level; if the height level corresponding to the new driving mode does not include the air spring height level of the previous driving mode, then the air spring height level should be switched to the closest height level of the new driving mode.

[0111] based on Figure 5 In its specific implementation, step S701 can be achieved through the following steps, such as... Figure 8 As shown:

[0112] S801: If the current vehicle speed is less than the first speed threshold, and the current height level of the air spring is the second or third height level, adjust the height level of the air spring to the first height level.

[0113] It should be understood that when the road surface smoothness parameter is greater than the second parameter threshold, the current road surface smoothness of the vehicle is poor. In order to avoid scraping the chassis, the vehicle chassis height can only be increased as much as possible. That is, the target height level of the air spring is only increased within the height level range corresponding to the first preset driving mode.

[0114] When the current vehicle speed is less than the first threshold, and the current height level of the air spring is the second or third height level, the height level of the air spring is raised to the first height level.

[0115] S802: If the current vehicle speed is greater than the first speed threshold, determine whether the current vehicle speed is less than the second speed threshold.

[0116] If the vehicle's current speed is less than the second speed threshold, proceed to step S803, which means adjusting the current height level of the air spring to the second height level when the current height level of the air spring is the third height level; if the vehicle's current speed is greater than the second speed threshold, proceed to step S804, which means maintaining the current height level of the air spring.

[0117] S803: When the current height level of the air spring is the third height level, adjust the current height level of the air spring to the second height level.

[0118] When the current vehicle speed is greater than the first speed threshold but less than the second speed threshold, and the current height level of the air spring is the third height level, raise the height level of the air spring to the second height level.

[0119] S804: Maintain the current height rating of the air spring.

[0120] It is understandable that when the vehicle's current speed is less than the first speed threshold, it corresponds to the first height level of the air spring; when the vehicle's current speed is greater than the first speed threshold but less than the second speed threshold, it corresponds to the second height level of the air spring; and when the vehicle's current speed is greater than the second speed threshold, it corresponds to the third height level of the air spring. Therefore, when the vehicle's current speed is greater than the second speed threshold, to adjust the air spring's height level to the third height level, the air spring's height level can only be lowered; there is no way to raise the height level. Therefore, it is sufficient to maintain the current height level of the air spring.

[0121] In summary, when the road surface smoothness parameter is greater than the second parameter threshold, the air suspension adjustment logic is as follows: Figure 9 As shown, where A represents the current vehicle speed, a1 represents the first speed threshold, a2 represents the second speed threshold, and a3 represents the third speed threshold, in the first driving mode, when the current vehicle speed is less than the first speed threshold, the air spring is adjusted from the second height level to the first height level; when the current vehicle speed is greater than the first speed threshold but less than the second speed threshold, the air spring is adjusted from the third height level to the second height level. In the second driving mode, when the current vehicle speed is greater than the first speed threshold but less than the second speed threshold, the air spring is adjusted from the third height level to the second height level. In the second driving mode, since there is only one height level, there is no need to adjust the air spring height level.

[0122] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0123] In one implementation, this invention discloses a vehicle including a controller and an air suspension, the air suspension including air springs, the internal structure of which can be shown in the figure below. Figure 10 As shown, during vehicle operation, the controller controls the air spring to perform the steps of any embodiment of the air suspension height adjustment method described above.

[0124] In one embodiment, an air suspension is provided, including a controller and an air spring, the controller controlling the air spring to perform the following steps:

[0125] Real-time acquisition of driving information and road surface smoothness parameters that characterize the smoothness of the road surface the vehicle is currently driving on. The driving information includes the current vehicle speed.

[0126] The height of the air suspension is dynamically adjusted based on the current vehicle speed and road surface smoothness parameters.

[0127] In one implementation, embodiments of this application disclose a computer-readable storage medium that, when executed by a processor in a computer device, enables the computer device to perform various steps of any embodiment of an air suspension height adjustment method disclosed herein. The computer-readable storage medium may be non-volatile or volatile.

[0128] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0129] Real-time acquisition of driving information and road surface smoothness parameters that characterize the smoothness of the road surface the vehicle is currently driving on. The driving information includes the current vehicle speed.

[0130] The height of the air suspension is dynamically adjusted based on the current vehicle speed and road surface smoothness parameters.

[0131] In one implementation, embodiments of the present invention disclose an air suspension height adjustment device, such as... Figure 11 As shown, the device includes:

[0132] The parameter acquisition unit 1101 is used to acquire driving information in real time and acquire road surface smoothness parameters that characterize the smoothness of the road surface where the vehicle is currently driving. The driving information includes the current vehicle speed.

[0133] The dynamic adjustment unit 1102 is used to dynamically adjust the height of the air suspension according to the current vehicle speed and road surface smoothness parameters.

[0134] In one implementation, the dynamic adjustment unit 1102 can be used to:

[0135] If the road surface smoothness parameter is less than the first parameter threshold or greater than the second parameter threshold, the target height level of the air spring is controlled according to the current vehicle speed.

[0136] If the road surface smoothness parameter is between the first parameter threshold and the second parameter threshold, maintain the current target height level of the air spring.

[0137] In one implementation, the dynamic adjustment unit 1102 can be used to:

[0138] In the first preset driving mode, the target height level of the air spring is switched between the corresponding height levels in the first preset driving mode according to the change in the current vehicle speed.

[0139] In the second preset driving mode, the target height level for controlling the air spring is the height level corresponding to the second preset driving mode.

[0140] In one implementation, the dynamic adjustment unit 1102 can be used to:

[0141] In the first preset driving mode, the target height level of the air spring is increased only within the corresponding height level range in the first preset driving mode, based on the change in the current vehicle speed.

[0142] In the second preset driving mode, the target height level of the air spring is the height level corresponding to the second preset driving mode.

[0143] In one implementation,

[0144] The first preset driving mode includes a first driving mode and a second driving mode. The altitude levels corresponding to the first driving mode include a first altitude level, a second altitude level, and a third altitude level. The altitude levels corresponding to the second driving mode include a second altitude level and a third altitude level.

[0145] The second preset driving mode includes the third driving mode, and the corresponding altitude level under the third driving mode includes the third altitude level;

[0146] The air spring height corresponding to the first altitude level is greater than the air spring height corresponding to the second altitude level, and the air spring height corresponding to the second altitude level is greater than the air spring height corresponding to the third altitude level.

[0147] In one implementation, the dynamic adjustment unit 1102 can be used to:

[0148] If the current vehicle speed is less than the first speed threshold, adjust the air spring height level to the first height level.

[0149] If the current vehicle speed is greater than the first speed threshold, determine whether the current vehicle speed is less than the second speed threshold; if the second speed threshold is greater than the first speed threshold.

[0150] If the current vehicle speed is less than the second speed threshold, adjust the air spring height level to the second height level.

[0151] If the current vehicle speed is greater than the second speed threshold, adjust the air spring height level to the third height level.

[0152] In one implementation, the dynamic adjustment unit 1102 can be used to:

[0153] If the current vehicle speed is less than the first speed threshold, and the current height level of the air spring is the second or third height level, adjust the height level of the air spring to the first height level.

[0154] If the current vehicle speed is greater than the first speed threshold, determine whether the current vehicle speed is less than the second speed threshold.

[0155] If the current vehicle speed is less than the second speed threshold, and the current height level of the air spring is the third height level, adjust the current height level of the air spring to the second height level.

[0156] If the vehicle's current speed is greater than the second speed threshold, maintain the current height level of the air springs.

[0157] In one implementation, the parameter acquisition unit 1101 can be used for:

[0158] The vehicle's raw acceleration signal is acquired in real time, and the raw acceleration signal is obtained by superimposing acceleration signals of different frequencies;

[0159] Each acceleration signal is preprocessed to calculate the preprocessed values ​​of the road surface smoothness parameters corresponding to each acceleration signal;

[0160] The preprocessed values ​​of the road surface smoothness parameters are subjected to high-frequency signal filtering to obtain the road surface smoothness parameters.

[0161] For specific limitations regarding the air suspension height adjustment device, please refer to the relevant limitations on the air suspension height adjustment method mentioned above, which will not be repeated here. Each module in the aforementioned air suspension height adjustment device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0162] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0163] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0164] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An air suspension ride height adjustment method, characterized by, The method comprises: obtaining driving information in real time, and obtaining a road flatness parameter representing a current road flatness condition of a vehicle, the driving information comprising a current vehicle speed; dynamically adjusting a height of an air suspension according to the current vehicle speed and the road flatness parameter; the air suspension comprises an air spring, and the dynamically adjusting the height of the air suspension according to the current vehicle speed and the road flatness parameter comprises: controlling a target height level of the air spring according to the current vehicle speed, if the road flatness parameter is less than a first parameter threshold or greater than a second parameter threshold; maintaining a current target height level of the air spring, if the road flatness parameter is between the first parameter threshold and the second parameter threshold.

2. The air ride height adjustment method of claim 1, wherein, the controlling the target height level of the air spring according to the current vehicle speed, if the road flatness parameter is less than the first parameter threshold, comprises: controlling the target height level of the air spring to switch between height levels corresponding to a first preset driving mode according to a magnitude change of the current vehicle speed, in the first preset driving mode; controlling the target height level of the air spring to be a height level corresponding to a second preset driving mode, in the second preset driving mode.

3. The air suspension ride height adjustment method of claim 1 or 2, wherein, the controlling the target height level of the air spring according to the current vehicle speed, if the road flatness parameter is greater than the second parameter threshold, comprises: controlling the target height level of the air spring to only level up within a range of height levels corresponding to a first preset driving mode according to a magnitude change of the current vehicle speed, in the first preset driving mode; controlling the target height level of the air spring to be a height level corresponding to a second preset driving mode, in the second preset driving mode.

4. The air suspension height adjustment method of claim 3, wherein: the first preset driving mode comprises a first driving mode and a second driving mode, the height levels corresponding to the first driving mode comprise a first height level, a second height level and a third height level, and the height levels corresponding to the second driving mode comprise the second height level and the third height level; the second preset driving mode comprises a third driving mode, and the height level corresponding to the third driving mode comprises the third height level; the air spring height corresponding to the first height level is greater than the air spring height corresponding to the second height level, and the air spring height corresponding to the second height level is greater than the air spring height corresponding to the third height level.

5. The air ride height adjustment method of claim 4, wherein, the controlling the target height level of the air spring to switch between the height levels corresponding to the first preset driving mode according to the magnitude change of the current vehicle speed, comprises: adjusting the height level of the air spring to the first height level, if the current vehicle speed is less than a first speed threshold; judging whether the current vehicle speed is less than a second speed threshold, if the current vehicle speed is greater than the first speed threshold, the second speed threshold being greater than the first speed threshold; adjusting the height level of the air spring to the second height level, if the current vehicle speed is less than the second speed threshold. If the current vehicle speed is greater than the second speed threshold, adjusting the height level of the air spring to a third height level.

6. The air ride height adjustment method of claim 4, wherein, The control of the target height level of the air spring according to the magnitude change of the current vehicle speed only performs level promotion within the corresponding height level range in the first preset driving mode, comprising: If the current vehicle speed is less than the first speed threshold, when the current height level of the air spring is the second height level or the third height level, adjusting the height level of the air spring to the first height level; If the current vehicle speed is greater than the first speed threshold, determining whether the current vehicle speed is less than the second speed threshold; If the current vehicle speed is less than the second speed threshold, when the current height level of the air spring is the third height level, adjusting the current height level of the air spring to the second height level; If the current vehicle speed is greater than the second speed threshold, maintaining the current height level of the air spring.

7. The air ride height adjustment method of claim 1, wherein, The road flatness parameter representing the current road flatness of the vehicle is obtained, comprising: Real-time acquisition of the original acceleration signal of the vehicle, the original acceleration signal being obtained by superimposing acceleration signals of different frequencies; Respectively pre-processing each of the acceleration signals to calculate the road flatness parameter pre-processing value corresponding to each of the acceleration signals; High-frequency signal filtering on the road flatness parameter pre-processing value to obtain the road flatness parameter.

8. A vehicle characterized by comprising: The vehicle comprises an air suspension and a controller, the air suspension comprising an air spring, and the controller controls the air spring to realize the air suspension height adjustment method according to any one of claims 1 to 7.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by a processor to realize the air suspension height adjustment method according to any one of claims 1 to 7.

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