Air suspension fault diagnosis method, device, equipment and readable storage medium

Abstract

The present application provides an air suspension fault diagnosis method, device, equipment, and readable storage medium. The method includes: during the process of an air pump inflating a target object, monitoring the change of a first target parameter, wherein the first target parameter includes at least the pressure of the air pipeline where the air pump and the target object are located; if the change of the first target parameter meets a first condition, then isolating the air pipeline between the air pump and the target object and monitoring the change of a second target parameter, wherein the second target parameter includes at least the pressure of the air pipeline where the air pump is located; and determining the cause of the abnormal inflation of the target object by the air pump based on the change of the second target parameter. Through the present application, the cause of the abnormal inflation of the target object by the air pump can be accurately diagnosed, thereby reducing the difficulty of maintenance and improving maintenance efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle fault diagnosis, and in particular to an air suspension fault diagnosis method, device, equipment and readable storage medium. Background Art

[0002] With the continuous development of the automotive industry, air suspension systems have been widely used in various types of vehicles. Air suspension has many advantages, such as adjustable vehicle height, improved ride comfort and improved vehicle handling.

[0003] Currently, air suspension fault diagnosis technology has made some progress. Existing techniques typically monitor specific parameters during specific operating processes, diagnosing the presence and cause of a fault based on the specific parameters' performance. However, these diagnostics often yield inaccurate results, significantly hindering maintenance personnel, complicating and time-consuming the repair process. These diagnostics can also lead to incorrect repair decisions, further exacerbating vehicle damage. Summary of the Invention

[0004] The present application provides an air suspension fault diagnosis method, device, equipment and readable storage medium, which can accurately diagnose the cause of abnormal inflation of a target object by an air pump.

[0005] In a first aspect, an embodiment of the present application provides an air suspension fault diagnosis method, the air suspension fault diagnosis method comprising:

[0006] During the process of the air pump inflating the target object, monitoring a change in a first target parameter, wherein the first target parameter at least includes a pressure in an air pipeline where the air pump and the target object are located;

[0007] If the change in the first target parameter meets the first condition, the air pipeline between the air pump and the target object is cut off, and the change in the second target parameter is monitored, wherein the second target parameter at least includes the pressure of the air pipeline where the air pump is located;

[0008] The reason why the air pump inflates the target object abnormally is determined based on the change in the second target parameter.

[0009] Furthermore, in one embodiment, the target object is an air spring, and the first target parameter includes the pressure of the air pump and the air pipeline where the air spring is located and the height of the air spring;

[0010] The step of monitoring the change of the first target parameter includes:

[0011] When the inflation time reaches a first preset time, the pressure of the air pipeline where the air pump and the air spring are located is recorded as a first initial value, and the height of the air spring is recorded as a second initial value;

[0012] The difference between the pressure of the air line where the air pump and the air spring are located and the first initial value is calculated in real time to obtain a first real-time difference, and the difference between the height of the air spring and the second initial value is calculated in real time to obtain a second real-time difference;

[0013] The first condition includes: at each moment within the second preset time period, the absolute value of the first real-time difference is less than the first threshold, and the absolute value of the second real-time difference is less than the second threshold.

[0014] Furthermore, in one embodiment, the second target parameter includes the pressure of the air line where the air pump is located;

[0015] The step of monitoring the change of the second target parameter includes:

[0016] When the air line between the air pump and the air spring is cut off, the pressure of the air line where the air pump is located is recorded as the third initial value;

[0017] Real-time calculation of the difference between the pressure of the air line where the air pump is located and the third initial value to obtain a third real-time difference value;

[0018] The step of determining the reason why the air pump inflates the target object abnormally according to the change of the second target parameter includes:

[0019] If the change in the second target parameter meets the second condition, determining that the air pump and its power supply circuit are broken, the second condition includes: at each moment within the third preset time period, the absolute value of the third real-time difference is less than the third threshold;

[0020] If the change in the second target parameter meets the third condition, it is determined that the air spring or its air pipeline is leaking. The third condition includes: at any time within a third preset time period, the absolute value of the third real-time difference is greater than or equal to a third threshold.

[0021] Furthermore, in one embodiment, the target object is an air tank, and the first target parameter includes the pressure of the air pipeline where the air pump and the air tank are located;

[0022] The step of monitoring the change of the first target parameter includes:

[0023] When the inflation time reaches a fourth preset time, the pressure of the air pipeline where the air pump and the air storage tank are located is recorded as a fourth initial value;

[0024] Real-time calculation of the difference between the pressure of the air pipeline where the air pump and the air storage tank are located and the fourth initial value to obtain a fourth real-time difference value;

[0025] The first condition includes: at each moment within a fifth preset time period, the absolute value of the fourth real-time difference is less than a fourth threshold.

[0026] Furthermore, in one embodiment, the second target parameter includes the pressure of the air line where the air pump is located;

[0027] The step of monitoring the change of the second target parameter includes:

[0028] When the air pipeline between the air pump and the air storage tank is cut off, the pressure of the air pipeline where the air pump is located is recorded as the fifth initial value;

[0029] Real-time calculation of the difference between the pressure of the air line where the air pump is located and the fifth initial value to obtain a fifth real-time difference value;

[0030] The step of determining the reason why the air pump inflates the target object abnormally according to the change of the second target parameter includes:

[0031] If the change in the second target parameter meets the fourth condition, determining that the air pump and its power supply circuit are broken, the fourth condition includes: at each moment within the sixth preset time period, the absolute value of the fifth real-time difference is less than the fifth threshold;

[0032] If the change in the second target parameter meets the fifth condition, it is determined that the air tank or its air pipeline is leaking. The fifth condition includes: at any time within the sixth preset time period, the absolute value of the fifth real-time difference is greater than or equal to the fifth threshold.

[0033] Furthermore, in one embodiment, during the process of the air pump inflating the target object, the pressure of the air pipeline where the air pump and the target object are located is measured by a pressure sensor in the air distribution valve;

[0034] The step of isolating the air line between the air pump and the target object includes:

[0035] Close the valve of the target object in the air distribution valve to measure the pressure of the air line where the air pump is located through the pressure sensor in the air distribution valve.

[0036] Furthermore, in one embodiment, the air suspension fault diagnosis method further includes:

[0037] When the air pump is not inflating any object, monitor the pressure of the air line where the air pump is located;

[0038] If the pressure of the air pipeline where the air pump is located is greater than or equal to the sixth threshold, it is determined that the air pump and its power supply circuit are short-circuited.

[0039] In a second aspect, an embodiment of the present application further provides an air suspension fault diagnosis device, the air suspension fault diagnosis device comprising:

[0040] a first monitoring module, configured to monitor changes in a first target parameter during the process of the air pump inflating the target object, wherein the first target parameter at least includes the pressure of the air pipeline between the air pump and the target object;

[0041] a second monitoring module, configured to, if a change in the first target parameter satisfies a first condition, cut off the air line between the air pump and the target object, and monitor changes in a second target parameter, wherein the second target parameter at least includes a pressure in the air line where the air pump is located;

[0042] The cause determination module is used to determine the cause of abnormal inflation of the target object by the air pump according to the change of the second target parameter.

[0043] In a third aspect, an embodiment of the present application further provides an air suspension fault diagnostic device, which includes a processor, a memory, and an air suspension fault diagnostic program stored in the memory and executable by the processor, wherein when the air suspension fault diagnostic program is executed by the processor, the steps of the above-mentioned air suspension fault diagnostic method are implemented.

[0044] In a fourth aspect, an embodiment of the present application further provides a readable storage medium, on which an air suspension fault diagnosis program is stored, wherein when the air suspension fault diagnosis program is executed by a processor, the steps of the above-mentioned air suspension fault diagnosis method are implemented.

[0045] In this application, while the air pump is inflating a target object, changes in a first target parameter are monitored; if the changes in the first target parameter meet a first condition, the air line between the air pump and the target object is cut off, and changes in a second target parameter are monitored; and based on the changes in the second target parameter, the cause of the air pump's abnormal inflation of the target object is determined. Through this application, the cause of the air pump's abnormal inflation of the target object can be accurately diagnosed, thereby reducing maintenance difficulty and improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the flow of an air suspension fault diagnosis method in one embodiment of the present application;

[0047] Figure 2 This is a schematic structural diagram of an air suspension system in one embodiment of the present application;

[0048] Figure 3 This is a schematic diagram of the functional modules of an air suspension fault diagnosis device in one embodiment of the present application;

[0049] Figure 4 This is a schematic diagram of the hardware structure of the air suspension fault diagnosis device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0052] In a first aspect, an embodiment of the present application provides an air suspension fault diagnosis method.

[0053] Figure 1 A flow chart of an air suspension fault diagnosis method in an embodiment of the present application is shown.

[0054] Reference Figure 1 In one embodiment, the air suspension fault diagnosis method includes the following steps:

[0055] S1. During the process of the air pump inflating the target object, monitor the change of a first target parameter, wherein the first target parameter at least includes the pressure of the air pipeline where the air pump and the target object are located.

[0056] Specifically, in the air suspension system, the air pump does not work when there is sufficient air in the air tank. If the air spring needs to be inflated, the valve of the air tank and the valve of the air spring are opened to connect the air pipeline between the air tank and the air spring, thereby inflating the air spring through the air tank.

[0057] The air pump operates when the air tank does not have sufficient air. The inflated object may be the air spring or the air tank. If the air spring needs to be inflated, the air pump is started, and the air pump valve and the air spring valve are opened, connecting the air line between the air pump and the air spring, allowing the air pump to inflate the air spring. If the air spring does not need to be inflated, the air pump is started, and the air pump valve and the air tank valve are opened, connecting the air line between the air pump and the air tank, allowing the air pump to inflate the air tank.

[0058] During the process of the air pump inflating the target object, if there is no abnormality, the first target parameter will show an expected change.

[0059] For example, when the air pump is inflating the air spring, the pressure in the air line where the air pump and the air spring are located will increase, and the height of the air spring will also increase.

[0060] For example, when the air pump is filling the air tank with air, the pressure of the air line where the air pump and the air tank are located will increase.

[0061] If the first target parameter shows unexpected changes, it indicates that there is an abnormality in the air pump's inflation process. However, under different abnormal reasons, the first target parameter may show the same changes, making it impossible to accurately diagnose the cause of the inflation abnormality based on the changes in the first target parameter.

[0062] For example, when the air pump is inflating the air spring, if the air pump and its power supply line are disconnected, the air pump does not supply high-pressure air to the air pipe between the air pump and the air spring, which may result in no obvious change in the pressure of the air pipe where the air pump and the air spring are located, and no obvious change in the height of the air spring. When the air spring or its air pipe leaks, the high-pressure air supplied by the air pump to the air pipe between the air pump and the air spring leaks, which may also result in no obvious change in the pressure of the air pipe where the air pump and the air spring are located, and no obvious change in the height of the air spring.

[0063] For example, when the air pump is inflating the air tank, if the air pump and its power supply circuit are disconnected, the air pump will not supply high-pressure air to the air pipeline between the air pump and the air tank, which may result in no obvious change in the pressure of the air pipeline between the air pump and the air tank for a period of time. When the air tank or its air pipeline leaks, the high-pressure air supplied by the air pump to the air pipeline between the air pump and the air tank leaks, which may also result in no obvious change in the pressure of the air pipeline between the air pump and the air tank for a period of time.

[0064] S2. If the change in the first target parameter meets the first condition, the air pipeline between the air pump and the target object is cut off, and the change in the second target parameter is monitored, wherein the second target parameter at least includes the pressure of the air pipeline where the air pump is located.

[0065] In this embodiment, the first condition describes the change in the first target parameter when the abnormality is not as expected and there are multiple possible causes. After isolating the air line between the air pump and the target object, the second target parameter will show different changes depending on the cause of the abnormality. Therefore, the cause of the inflation abnormality can be accurately diagnosed based on the change in the second target parameter.

[0066] Optionally, the air line between the air pump and the target object can be isolated by closing one of the valves of the air pump and the target object.

[0067] S3. Determine the reason why the air pump inflates the target object abnormally based on the change in the second target parameter.

[0068] For example, during the process of the air pump inflating the air spring, the pressure in the air pipeline where the air pump and the air spring are located does not change significantly for a period of time, and the height of the air spring does not change significantly. After isolating the air pipeline between the air pump and the air spring, if the pressure in the air pipeline where the air pump is located changes significantly, it means that the air pump and its power supply line are normal, and the cause of the abnormality is leakage of the air spring or its air pipeline. Conversely, if the pressure in the air pipeline where the air pump is located does not change significantly, it means that the air pump and its power supply line are broken.

[0069] For example, during the process of the air pump inflating the air tank, the pressure of the air pipeline where the air pump and the air tank are located does not change significantly for a period of time. After the air pipeline between the air pump and the air tank is isolated, if the pressure in the air pipeline where the air pump is located changes significantly, it means that the air pump and its power supply line are normal, and the abnormality is caused by leakage in the air tank or its air pipeline. Conversely, if the pressure in the air pipeline where the air pump is located does not change significantly, it means that the air pump and its power supply line are broken.

[0070] In this embodiment, while the air pump is inflating a target object, changes in a first target parameter are monitored. If the change in the first target parameter meets a first condition, the air line between the air pump and the target object is cut off, and changes in a second target parameter are monitored. Based on the change in the second target parameter, the cause of the air pump's abnormal inflation of the target object is determined. This embodiment allows accurate diagnosis of the cause of the air pump's abnormal inflation of the target object, thereby reducing maintenance difficulty and improving maintenance efficiency.

[0071] Furthermore, in one embodiment, the target object is an air spring, and the first target parameter includes the pressure of the air pump and the air pipeline where the air spring is located and the height of the air spring;

[0072] The step of monitoring the change of the first target parameter includes:

[0073] When the inflation time reaches a first preset time, the pressure of the air pipeline where the air pump and the air spring are located is recorded as a first initial value, and the height of the air spring is recorded as a second initial value;

[0074] The difference between the pressure of the air line where the air pump and the air spring are located and the first initial value is calculated in real time to obtain a first real-time difference, and the difference between the height of the air spring and the second initial value is calculated in real time to obtain a second real-time difference;

[0075] The first condition includes: at each moment within the second preset time period, the absolute value of the first real-time difference is less than the first threshold, and the absolute value of the second real-time difference is less than the second threshold.

[0076] In this embodiment, when the air pump is inflating the air spring, and the pressure in the air pipeline where the air pump and the air spring are located does not change significantly, and the height of the air spring does not change significantly within a period of time, specific parameter monitoring methods and condition judgment methods are provided to improve the accuracy of fault diagnosis.

[0077] It should be noted that in the short period of time after the valves of the air spring and air pump are just opened, there is usually a pressure difference on both sides of the valve, and the first target parameter measured at this time will fluctuate significantly. The first preset time length is used to ensure that the pressure difference on both sides of the valve has been eliminated, so as to improve the reliability of the first initial value and the second initial value.

[0078] Furthermore, in one embodiment, the second target parameter includes the pressure of the air line where the air pump is located;

[0079] The step of monitoring the change of the second target parameter includes:

[0080] When the air line between the air pump and the air spring is cut off, the pressure of the air line where the air pump is located is recorded as the third initial value;

[0081] Real-time calculation of the difference between the pressure of the air line where the air pump is located and the third initial value to obtain a third real-time difference value;

[0082] The step of determining the reason why the air pump inflates the target object abnormally according to the change of the second target parameter includes:

[0083] If the change in the second target parameter meets the second condition, determining that the air pump and its power supply circuit are broken, the second condition includes: at each moment within the third preset time period, the absolute value of the third real-time difference is less than the third threshold;

[0084] If the change in the second target parameter meets the third condition, it is determined that the air spring or its air pipeline is leaking. The third condition includes: at any time within a third preset time period, the absolute value of the third real-time difference is greater than or equal to a third threshold.

[0085] In this embodiment, after isolating the air pipeline between the air pump and the air spring, the reason for the abnormal inflation of the air spring by the air pump is determined based on the change in the pressure of the air pipeline where the air pump is located. For the cases where the pressure of the air pipeline where the air pump is located changes significantly and the cases where the pressure of the air pipeline where the air pump is located does not change significantly, specific parameter monitoring methods and condition judgment methods are provided to improve the accuracy of fault diagnosis.

[0086] It's important to note that after isolating the air line between the air pump and the air spring, the cause of the abnormal air spring inflation can theoretically be determined based on the pressure change in the air spring's air line. Specifically, if the pressure in the air spring's air line changes significantly, the abnormality is due to a leak in the air spring or its air line, and the air pump and its power supply are normal. Conversely, if the pressure in the air spring's air line remains unchanged, the air pump and its power supply are broken.

[0087] However, considering that in actual situations, the leakage rate of the air spring or its air pipeline is difficult to predict, while the inflation rate of the air pump is known, it would be more accurate to determine the cause of the abnormal inflation of the air spring by the air pump based on the changes in the pressure of the air pipeline where the air pump is located.

[0088] Furthermore, in one embodiment, the target object is an air tank, and the first target parameter includes the pressure of the air pipeline where the air pump and the air tank are located;

[0089] The step of monitoring the change of the first target parameter includes:

[0090] When the inflation time reaches a fourth preset time, the pressure of the air pipeline where the air pump and the air storage tank are located is recorded as a fourth initial value;

[0091] Real-time calculation of the difference between the pressure of the air pipeline where the air pump and the air storage tank are located and the fourth initial value to obtain a fourth real-time difference value;

[0092] The first condition includes: at each moment within a fifth preset time period, the absolute value of the fourth real-time difference is less than a fourth threshold.

[0093] In this embodiment, when the air pump is charging the air tank, if the pressure in the air pipeline where the air pump and the air tank are located does not change significantly for a period of time, a specific parameter monitoring method and condition determination method are provided to improve the accuracy of fault diagnosis.

[0094] Similar to the previous example, in the short period of time after the valves of the gas tank and the air pump are opened, there is usually a pressure difference on both sides of the valves, and the measured first target parameter will fluctuate significantly. The fourth preset time length is used to ensure that the pressure difference on both sides of the valve has been eliminated, so as to improve the reliability of the fourth initial value.

[0095] Furthermore, in one embodiment, the second target parameter includes the pressure of the air line where the air pump is located;

[0096] The step of monitoring the change of the second target parameter includes:

[0097] When the air pipeline between the air pump and the air storage tank is cut off, the pressure of the air pipeline where the air pump is located is recorded as the fifth initial value;

[0098] Real-time calculation of the difference between the pressure of the air line where the air pump is located and the fifth initial value to obtain a fifth real-time difference value;

[0099] The step of determining the reason why the air pump inflates the target object abnormally according to the change of the second target parameter includes:

[0100] If the change in the second target parameter meets the fourth condition, determining that the air pump and its power supply circuit are broken, the fourth condition includes: at each moment within the sixth preset time period, the absolute value of the fifth real-time difference is less than the fifth threshold;

[0101] If the change in the second target parameter meets the fifth condition, it is determined that the air tank or its air pipeline is leaking. The fifth condition includes: at any time within the sixth preset time period, the absolute value of the fifth real-time difference is greater than or equal to the fifth threshold.

[0102] In this embodiment, after isolating the air pipeline between the air pump and the air tank, the cause of the abnormal inflation of the air tank by the air pump is determined based on the change in the pressure of the air pipeline where the air pump is located. For situations where the pressure of the air pipeline where the air pump is located changes significantly and situations where the pressure of the air pipeline where the air pump is located does not change significantly, specific parameter monitoring methods and condition judgment methods are provided to improve the accuracy of fault diagnosis.

[0103] Similar to the previous article, the leakage rate of the air tank or its air pipeline is difficult to predict, but the inflation rate of the air pump is known. It will be more accurate to determine the cause of the abnormal inflation of the air tank by the air pump based on the changes in the pressure of the air pipeline where the air pump is located.

[0104] Figure 2 A structural diagram of an air suspension system in an embodiment of the present application is shown.

[0105] Reference Figure 2 In some air suspension systems, instead of setting up separate pressure sensors for the air pump, air tank, and each air spring, the pressure of the air line where a single object is located and the pressure of the air line where multiple objects are located are measured with the help of pressure sensors in the air distribution valve and different valve opening methods.

[0106] Specifically, when the valve of a specific object (air pump / air tank / left front air spring / right front air spring / left rear air spring / right rear air spring) in the air distribution valve is open and the other valves are closed, the pressure sensor in the air distribution valve measures the pressure in the air line where the object is located. When the valves of multiple objects in the air distribution valve (for example, the air pump and air tank, the air pump and air spring, or the air tank and air spring) are open and the other valves are closed, the pressure sensor in the air distribution valve measures the pressure in the air lines where these objects are located.

[0107] Furthermore, in one embodiment, during the process of the air pump inflating the target object, the pressure of the air pipeline where the air pump and the target object are located is measured by a pressure sensor in the air distribution valve;

[0108] The step of isolating the air line between the air pump and the target object includes:

[0109] Close the valve of the target object in the air distribution valve to measure the pressure of the air line where the air pump is located through the pressure sensor in the air distribution valve.

[0110] In this embodiment, during the process of the air pump inflating the target object, the valves of the air pump and the target object in the air distribution valve are opened, and the other valves are closed. The pressure measured by the pressure sensor in the air distribution valve is the pressure of the air pipeline where the air pump and the target object are located. After the valve of the target object in the air distribution valve is closed, the valve of the air pump in the air distribution valve is opened, and the other valves are closed. The pressure measured by the pressure sensor in the air distribution valve is the pressure of the air pipeline where the air pump is located.

[0111] Furthermore, in one embodiment, the air suspension fault diagnosis method further includes:

[0112] When the air pump is not inflating any object, monitor the pressure of the air line where the air pump is located;

[0113] If the pressure of the air pipeline where the air pump is located is greater than or equal to the sixth threshold, it is determined that the air pump and its power supply circuit are short-circuited.

[0114] In this embodiment, when the air pump is not inflating any object, the pressure of the air pipeline where the air pump is located is monitored to determine whether the air pump and its power supply circuit are short-circuited, thereby improving the comprehensiveness of fault diagnosis.

[0115] Optionally, the sixth threshold is greater than the maximum operating pressure of the entire air suspension system and less than the opening pressure of the mechanical protection valve of the air pump.

[0116] For example, the maximum operating pressure of the entire air suspension system is 18 bar, the opening pressure of the mechanical protection valve of the air pump is 21 bar, and the sixth threshold value can be set to 19 bar.

[0117] In a second aspect, an embodiment of the present application also provides an air suspension fault diagnosis device.

[0118] Figure 3 A schematic diagram of the functional modules of an air suspension fault diagnosis device in one embodiment of the present application is shown.

[0119] Reference Figure 3 In one embodiment, the air suspension fault diagnosis device includes:

[0120] A first monitoring module 10 is configured to monitor changes in a first target parameter during the process of the air pump inflating the target object, wherein the first target parameter at least includes the pressure of the air pipeline between the air pump and the target object;

[0121] The second monitoring module 20 is configured to, if the change in the first target parameter meets the first condition, cut off the air line between the air pump and the target object and monitor the change in the second target parameter, wherein the second target parameter at least includes the pressure of the air line where the air pump is located;

[0122] The cause determination module 30 is configured to determine the cause of abnormal inflation of the target object by the air pump according to the change of the second target parameter.

[0123] Furthermore, in one embodiment, the target object is an air spring, and the first target parameter includes the pressure of the air pump and the air pipeline where the air spring is located and the height of the air spring;

[0124] The first monitoring module 10 is used for:

[0125] When the inflation time reaches a first preset time, the pressure of the air pipeline where the air pump and the air spring are located is recorded as a first initial value, and the height of the air spring is recorded as a second initial value;

[0126] The difference between the pressure of the air line where the air pump and the air spring are located and the first initial value is calculated in real time to obtain a first real-time difference, and the difference between the height of the air spring and the second initial value is calculated in real time to obtain a second real-time difference;

[0127] The first condition includes: at each moment within the second preset time period, the absolute value of the first real-time difference is less than the first threshold, and the absolute value of the second real-time difference is less than the second threshold.

[0128] Furthermore, in one embodiment, the second target parameter includes the pressure of the air line where the air pump is located;

[0129] The second monitoring module 20 is used for:

[0130] When the air line between the air pump and the air spring is cut off, the pressure of the air line where the air pump is located is recorded as the third initial value;

[0131] Real-time calculation of the difference between the pressure of the air line where the air pump is located and the third initial value to obtain a third real-time difference value;

[0132] The cause determination module 30 is used to:

[0133] If the change in the second target parameter meets the second condition, determining that the air pump and its power supply circuit are broken, the second condition includes: at each moment within the third preset time period, the absolute value of the third real-time difference is less than the third threshold;

[0134] If the change in the second target parameter meets the third condition, it is determined that the air spring or its air pipeline is leaking. The third condition includes: at any time within a third preset time period, the absolute value of the third real-time difference is greater than or equal to a third threshold.

[0135] Furthermore, in one embodiment, the target object is an air tank, and the first target parameter includes the pressure of the air pipeline where the air pump and the air tank are located;

[0136] The first monitoring module 10 is used for:

[0137] When the inflation time reaches a fourth preset time, the pressure of the air pipeline where the air pump and the air storage tank are located is recorded as a fourth initial value;

[0138] Real-time calculation of the difference between the pressure of the air pipeline where the air pump and the air storage tank are located and the fourth initial value to obtain a fourth real-time difference value;

[0139] The first condition includes: at each moment within a fifth preset time period, the absolute value of the fourth real-time difference is less than a fourth threshold.

[0140] Furthermore, in one embodiment, the second target parameter includes the pressure of the air line where the air pump is located;

[0141] The second monitoring module 20 is used for:

[0142] When the air pipeline between the air pump and the air storage tank is cut off, the pressure of the air pipeline where the air pump is located is recorded as the fifth initial value;

[0143] Real-time calculation of the difference between the pressure of the air line where the air pump is located and the fifth initial value to obtain a fifth real-time difference value;

[0144] The cause determination module 30 is used to:

[0145] If the change in the second target parameter meets the fourth condition, determining that the air pump and its power supply circuit are broken, the fourth condition includes: at each moment within the sixth preset time period, the absolute value of the fifth real-time difference is less than the fifth threshold;

[0146] If the change in the second target parameter meets the fifth condition, it is determined that the air tank or its air pipeline is leaking. The fifth condition includes: at any time within the sixth preset time period, the absolute value of the fifth real-time difference is greater than or equal to the fifth threshold.

[0147] Furthermore, in one embodiment, the first monitoring module 10 is configured to:

[0148] When the air pump is inflating the target object, the pressure of the air pipeline where the air pump and the target object are located is measured by the pressure sensor in the air distribution valve;

[0149] The second monitoring module 20 is used for:

[0150] Close the valve of the target object in the air distribution valve to measure the pressure of the air line where the air pump is located through the pressure sensor in the air distribution valve.

[0151] Furthermore, in one embodiment, the air suspension fault diagnosis device further includes a third monitoring module;

[0152] The third monitoring module is used to monitor the pressure of the air pipeline where the air pump is located when the air pump is not inflating any object;

[0153] The cause determination module 30 is further configured to determine that the air pump and its power supply circuit are short-circuited if the pressure of the air pipeline where the air pump is located is greater than or equal to a sixth threshold.

[0154] Among them, the functional implementation of each module in the above-mentioned air suspension fault diagnosis device corresponds to the various steps in the above-mentioned air suspension fault diagnosis method embodiment, and their functions and implementation processes are no longer repeated here.

[0155] In a third aspect, an embodiment of the present application provides an air suspension fault diagnosis device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0156] Figure 4 A schematic diagram of the hardware structure of the air suspension fault diagnosis device involved in the embodiment of the present application is shown.

[0157] Reference Figure 4 In an embodiment of the present application, the air suspension fault diagnosis device may include a processor, a memory, a communication interface, and a communication bus.

[0158] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0159] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, which interconnect components within the air suspension fault diagnosis device and connect the device to other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0160] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0161] The processor may be a general-purpose processor that can call an air suspension fault diagnosis program stored in a memory and execute the air suspension fault diagnosis method provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the air suspension fault diagnosis program is called can be referred to in the various embodiments of the air suspension fault diagnosis method of the present application and will not be further described here.

[0162] Those skilled in the art will understand that Figure 4 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0163] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0164] The readable storage medium of the present application stores an air suspension fault diagnosis program, wherein when the air suspension fault diagnosis program is executed by a processor, the steps of the air suspension fault diagnosis method as described above are implemented.

[0165] Among them, the method implemented when the air suspension fault diagnosis program is executed can refer to the various embodiments of the air suspension fault diagnosis method of the present application, and will not be repeated here.

[0166] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0167] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0168] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0169] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0170] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0171] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0172] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for diagnosing air suspension faults, characterized in that: The air suspension fault diagnosis method comprises: During the process of the air pump inflating the air spring, when the inflation time reaches a first preset time, the pressure of the air pipeline where the air pump and the air spring are located is recorded as a first initial value, and the height of the air spring is recorded as a second initial value. The difference between the pressure of the air pipeline where the air pump and the air spring are located and the first initial value is calculated in real time to obtain a first real-time difference value, and the difference between the height of the air spring and the second initial value is calculated in real time to obtain a second real-time difference value; If at each moment within the second preset time period, the absolute value of the first real-time difference is less than the first threshold value, and the absolute value of the second real-time difference is less than the second threshold value, the air line between the air pump and the air spring is cut off, the pressure of the air line where the air pump is located is recorded as the third initial value, and the difference between the pressure of the air line where the air pump is located and the third initial value is calculated in real time to obtain a third real-time difference; If at each moment within the third preset time period, the absolute value of the third real-time difference is less than the third threshold, it is determined that the air pump and its power supply circuit are broken; If at any time within the third preset time period, the absolute value of the third real-time difference is greater than or equal to the third threshold, it is determined that the air spring or its air pipeline is leaking.

2. The air suspension fault diagnosis method according to claim 1, wherein: When the air pump is inflating the air spring, the pressure of the air pipeline where the air pump and the air spring are located is measured by the pressure sensor in the air distribution valve; The step of isolating the air pipeline between the air pump and the air spring comprises: Close the valve of the air spring in the air distribution valve to measure the pressure of the air line where the air pump is located through the pressure sensor in the air distribution valve.

3. The air suspension fault diagnosis method according to claim 1, wherein: The air suspension fault diagnosis method further includes: monitoring the pressure of the air line where the air pump is located when no request for the air pump to inflate any object is detected; If the pressure of the air pipeline where the air pump is located is greater than or equal to the sixth threshold, it is determined that the air pump and its power supply circuit are short-circuited.

4. A method for diagnosing air suspension faults, characterized in that: The air suspension fault diagnosis method comprises: During the process of the air pump inflating the air storage tank, when the inflation time reaches a fourth preset time, the pressure of the air pipeline where the air pump and the air storage tank are located is recorded as a fourth initial value, and the difference between the pressure of the air pipeline where the air pump and the air storage tank are located and the fourth initial value is calculated in real time to obtain a fourth real-time difference value; If at each moment within the fifth preset time period, the absolute value of the fourth real-time difference is less than the fourth threshold, the air line between the air pump and the air tank is cut off, the pressure of the air line where the air pump is located is recorded as the fifth initial value, and the difference between the pressure of the air line where the air pump is located and the fifth initial value is calculated in real time to obtain a fifth real-time difference; If at each moment within the sixth preset time period, the absolute value of the fifth real-time difference is less than the fifth threshold, it is determined that the air pump and its power supply circuit are broken; If at any time within the sixth preset time period, the absolute value of the fifth real-time difference is greater than or equal to the fifth threshold, it is determined that the air tank or its air pipeline is leaking.

5. The air suspension fault diagnosis method according to claim 4, characterized in that: When the air pump is filling the air tank, the pressure of the air pipeline where the air pump and the air tank are located is measured by the pressure sensor in the air distribution valve; The step of isolating the air pipeline between the air pump and the air storage tank includes: Close the valve of the air tank in the air distribution valve to measure the pressure of the air line where the air pump is located through the pressure sensor in the air distribution valve.

6. The air suspension fault diagnosis method according to claim 4, characterized in that: The air suspension fault diagnosis method further includes: monitoring the pressure of the air line where the air pump is located when no request for the air pump to inflate any object is detected; If the pressure of the air pipeline where the air pump is located is greater than or equal to the sixth threshold, it is determined that the air pump and its power supply circuit are short-circuited.

7. An air suspension fault diagnosis device, characterized in that: The air suspension fault diagnosis device comprises: The first monitoring module is configured to, during the process of the air pump inflating the air spring, record the pressure of the air pipeline where the air pump and the air spring are located as a first initial value, record the height of the air spring as a second initial value, calculate in real time the difference between the pressure of the air pipeline where the air pump and the air spring are located and the first initial value to obtain a first real-time difference, and calculate in real time the difference between the height of the air spring and the second initial value to obtain a second real-time difference; a second monitoring module, configured to, if at each moment within a second preset time period, the absolute value of the first real-time difference is less than the first threshold value, and the absolute value of the second real-time difference is less than the second threshold value, cut off the air line between the air pump and the air spring, record the pressure of the air line where the air pump is located as a third initial value, and calculate in real time the difference between the pressure of the air line where the air pump is located and the third initial value to obtain a third real-time difference; The cause determination module is configured to determine that the air pump and its power supply circuit are broken if the absolute value of the third real-time difference is less than a third threshold value at each moment within a third preset time period; and to determine that the air spring or its air pipeline is leaking if the absolute value of the third real-time difference is greater than or equal to the third threshold value at any moment within the third preset time period.

8. An air suspension fault diagnosis device, characterized in that: The air suspension fault diagnosis device comprises: a first monitoring module configured to, during the process of the air pump inflating the air storage tank, record the pressure of the air pipeline where the air pump and the air storage tank are located as a fourth initial value when the inflation time reaches a fourth preset time, and calculate in real time the difference between the pressure of the air pipeline where the air pump and the air storage tank are located and the fourth initial value to obtain a fourth real-time difference value; a second monitoring module, configured to, if at each moment within a fifth preset time period, the absolute value of the fourth real-time difference is less than a fourth threshold, cut off the air line between the air pump and the air storage tank, record the pressure of the air line where the air pump is located as a fifth initial value, and calculate in real time the difference between the pressure of the air line where the air pump is located and the fifth initial value to obtain a fifth real-time difference; The cause determination module is configured to determine that the air pump and its power supply circuit are broken if the absolute value of the fifth real-time difference is less than a fifth threshold value at each moment within a sixth preset time period; and to determine that the air tank or its air pipeline is leaking if the absolute value of the fifth real-time difference is greater than or equal to the fifth threshold value at any moment within the sixth preset time period.

9. An air suspension fault diagnosis device, characterized in that: The air suspension fault diagnosis device includes a processor, a memory, and an air suspension fault diagnosis program stored in the memory and executable by the processor, wherein when the air suspension fault diagnosis program is executed by the processor, the steps of the air suspension fault diagnosis method as described in any one of claims 1 to 6 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores an air suspension fault diagnosis program, wherein when the air suspension fault diagnosis program is executed by the processor, the steps of the air suspension fault diagnosis method according to any one of claims 1 to 6 are implemented.

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