Air spring overpressure diagnosis method, device and equipment and computer readable storage medium

Abstract

The invention discloses an air spring overpressure diagnosis method, device and equipment and a computer readable storage medium, and relates to the technical field of vehicle diagnos.The air spring overpressure diagnosis method includes the steps that in the air inflation process of a target air spring, when it is detected that a first pressure value collected by a pressure sensor in an air spring system is larger than a preset overpressure threshold value, the air inflation action of the target air spring is controlled to be stopped; the pressure release valve is controlled to be in an open state, the pressure release valve is closed after a preset opening duration is continued, and the target air spring distribution valve is controlled to be in an open state to obtain a second pressure value; and if it is detected that the second pressure value is not smaller than a preset first pressure threshold value, it is judged that the target air spring is in an overpressure state, and the first pressure threshold value is smaller than the overpressure threshold value. Therefore, the air spring overpressure diagnosis method and device can effectively eliminate the influence of abnormal working of the air spring distribution valve, the air spring pressure retaining valve and the like on the air spring overpressure diagnosis, so as to realize the accurate diagnosis of the air spring overpressure.

Description

Technical Field

[0001] The present application relates to the field of vehicle diagnosis technology, and in particular to a method, device, equipment and computer-readable storage medium for diagnosing overpressure of an air spring. Background Art

[0002] In order to ensure the normal operation of the air spring system, it is usually necessary to control the pressure of the air spring system within a normal pressure range; if the air spring pressure is too high (that is, the air spring has an overpressure problem), an explosion may occur, endangering personal safety. Therefore, overpressure diagnosis is very necessary.

[0003] In the related art, when realizing the diagnosis of overpressure of the empty spring, once the pressure collected by the pressure sensor reaches the specified pressure threshold during the lifting process of the empty spring, an alarm of overpressure of the empty spring will be directly issued; because this scheme only reports the fault by simply detecting the pressure, and does not consider the influence of abnormal working of the empty spring distribution valve, the empty spring pressure-maintaining valve, etc. on the pressure of the empty spring, there is a possibility of misdiagnosis. Therefore, how to realize accurate diagnosis of overpressure of the empty spring is a problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a method, device, equipment and computer-readable storage medium for diagnosing overpressure of an empty spring, which can solve the technical problem of being unable to accurately diagnose overpressure of an empty spring in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a method for diagnosing an overpressure of an empty spring, the method comprising:

[0006] During the inflation process of the target empty spring, when it is detected that the first pressure value collected by the pressure sensor in the empty spring system is greater than a preset overpressure threshold, the inflation action of the target empty spring is stopped;

[0007] Control the pressure relief valve to be in an open state, close the pressure relief valve after being continuously opened for a preset time, and control the target air spring distribution valve to be in an open state to obtain a second pressure value;

[0008] If it is detected that the second pressure value is not less than a preset first pressure threshold, it is determined that the target empty spring is in an overpressure state, wherein the first pressure threshold is less than the overpressure threshold.

[0009] In combination with the first aspect, in one implementation, after the step of controlling the target empty spring distribution valve to be in an open state to obtain a second pressure value, the method further includes:

[0010] If it is detected that the second pressure value is less than the first pressure threshold, the air pump and the target air spring distribution valve are controlled to be in an open state to inflate the target air spring;

[0011] Obtain a third pressure value within a preset inflation time to determine the fault diagnosis results of the target air spring distribution valve and the target air spring pressure maintaining valve pipeline based on the size relationship between the third pressure value and a preset second pressure threshold, wherein the second pressure threshold is greater than the overpressure threshold.

[0012] In combination with the first aspect, in one implementation, the method of determining the fault diagnosis result of the target air spring distribution valve and the target air spring pressure-maintaining valve pipeline based on the magnitude relationship between the third pressure value and the preset second pressure threshold value includes:

[0013] If the third pressure value is greater than the second pressure threshold, it is determined that the target air spring distribution valve is faulty;

[0014] If the third pressure value is not greater than the second pressure threshold, it is determined that there is a fault in the target air spring pressure-maintaining valve pipeline and the target air spring is in an overpressure state.

[0015] In combination with the first aspect, in one implementation, after the step of determining that the target empty spring is in an overpressure state, the step further includes:

[0016] Controlling the pressure relief valve and the target empty spring distribution valve to be in an open state to exhaust the target empty spring;

[0017] When the pressure in the target empty spring is reduced to a preset overpressure recovery threshold, the exhaust operation is controlled to be in a stopped state so that the target empty spring is in a non-overpressure state.

[0018] In combination with the first aspect, in one implementation, the method further includes:

[0019] When it is detected that the first pressure value collected by the pressure sensor in the air spring system is not greater than the preset overpressure threshold, the target air spring is controlled to continue to be in an inflated state to achieve a lifting operation of the target air spring.

[0020] In a second aspect, an embodiment of the present application provides an empty spring overpressure diagnostic device, the empty spring overpressure diagnostic device comprising:

[0021] A detection control module is used for controlling the stopping of the inflation action of the target air spring when it is detected that the first pressure value collected by the pressure sensor in the air spring system is greater than a preset overpressure threshold value during the inflation process of the target air spring; controlling the pressure relief valve to be in an open state, closing the pressure relief valve after the preset opening time, and controlling the target air spring distribution valve to be in an open state to obtain a second pressure value;

[0022] An overpressure diagnostic module is used to determine that the target empty spring is in an overpressure state if it is detected that the second pressure value is less than a preset first pressure threshold, wherein the first pressure threshold is less than the overpressure threshold.

[0023] In combination with the second aspect, in one implementation, the detection control module is further configured to control the air pump and the target empty spring distribution valve to be in an open state to inflate the target empty spring if it is detected that the second pressure value is not less than the first pressure threshold;

[0024] The overpressure diagnostic module is also used to obtain a third pressure value within a preset inflation time, so as to determine the fault diagnosis results of the target air spring distribution valve and the target air spring pressure maintaining valve pipeline based on the size relationship between the third pressure value and a preset second pressure threshold, and the second pressure threshold is greater than the overpressure threshold.

[0025] In conjunction with the second aspect, in one implementation, the overvoltage diagnosis module is specifically used to:

[0026] If the third pressure value is greater than the second pressure threshold, it is determined that the target air spring distribution valve is faulty;

[0027] If the third pressure value is not greater than the second pressure threshold, it is determined that there is a fault in the target air spring pressure-maintaining valve pipeline and the target air spring is in an overpressure state.

[0028] In combination with the second aspect, in one implementation, the empty spring overpressure diagnostic device further includes an overpressure recovery module, which is used to:

[0029] Controlling the pressure relief valve and the target empty spring distribution valve to be in an open state to exhaust the target empty spring;

[0030] When the pressure in the target empty spring is reduced to a preset overpressure recovery threshold, the exhaust operation is controlled to be in a stopped state so that the target empty spring is in a non-overpressure state.

[0031] In combination with the second aspect, in one embodiment, the detection control module is also used to: when it is detected that the first pressure value collected by the pressure sensor in the air spring system is not greater than a preset over-pressure threshold, control the target air spring to continue to be inflated state to achieve the lifting operation of the target air spring.

[0032] In the third aspect, an embodiment of the present application provides an air spring overpressure diagnostic device, which includes a processor, a memory, and an air spring overpressure diagnostic program stored in the memory and executable by the processor, wherein when the air spring overpressure diagnostic program is executed by the processor, the steps of the air spring overpressure diagnostic method as described above are implemented.

[0033] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which is stored an empty spring overpressure diagnostic program, wherein when the empty spring overpressure diagnostic program is executed by a processor, the steps of the aforementioned empty spring overpressure diagnostic method are implemented.

[0034] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0035] During the inflation process of the target air spring, when it is detected that the first pressure value collected by the pressure sensor in the air spring system is greater than the over-pressure threshold, the target air spring will not be directly diagnosed as being in an over-pressure state, because the first pressure value is not necessarily the pressure value of the target air spring; at this time, it will be further judged whether the target air spring distribution valve or the target air spring pressure maintaining valve pipeline is installed normally, so as to eliminate the influence of abnormal working of the air spring distribution valve, the air spring pressure maintaining valve, etc. on the air spring pressure, that is, control the stopping of the inflation action of the target air spring and open the pressure relief valve to unload the high-pressure gas in the pipeline, and wait for the pressure relief valve to open for a preset opening time. Then close it again; then control the target empty spring distribution valve to be in an open state, so that the pressure in the pipeline comes from the target empty spring, and the second pressure value obtained at this time is the pressure value of the target empty spring; so when it is detected that the second pressure value is not less than the first pressure threshold (the first pressure threshold is less than the overpressure threshold), it means that the target empty spring distribution valve and the target empty spring pressure-maintaining valve pipeline installation are normal, that is, the first pressure value collected by the pressure sensor is indeed the pressure value of the target empty spring, and because the first pressure value is greater than the overpressure threshold, it can be accurately determined that the target empty spring is in an overpressure state. It can be seen that through this application, the influence of the abnormal working of the empty spring distribution valve and the empty spring pressure-maintaining valve on the overpressure diagnosis of the empty spring can be effectively eliminated, so as to achieve accurate diagnosis of the overpressure of the empty spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flow chart of an embodiment of the method for diagnosing overpressure of an empty spring of the present application;

[0037] Figure 2 This is a functional module diagram of an embodiment of an air spring overpressure diagnostic device of the present application;

[0038] Figure 3 This is a schematic diagram of the hardware structure of the air spring overpressure diagnostic device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0041] In a first aspect, an embodiment of the present application provides a method for diagnosing overpressure of an empty spring.

[0042] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of an embodiment of the method for diagnosing overpressure of an empty spring in the present application. Figure 1 As shown, the air spring overpressure diagnosis method includes:

[0043] Step S10: During the inflation process of the target air spring, when it is detected that the first pressure value collected by the pressure sensor in the air spring system is greater than a preset overpressure threshold, the inflation action of the target air spring is stopped.

[0044] By way of example, it should be understood that the target empty spring refers to an empty spring that requires overpressure diagnosis (i.e., the object to be diagnosed); the overpressure threshold refers to the pressure value used to determine whether the empty spring is overpressure. The specific value setting can be determined according to the actual needs of different vehicle models or through experimental calibration, and is not limited here. For example, the underpressure threshold is set to 13 bar; in addition, it should be noted that the pressure sensor in the air spring system is a common component, so whether it is air spring pressure detection or air tank pressure detection, it is achieved through the pressure sensor after opening the corresponding distribution valve.

[0045] It is understandable that the target air spring inflation refers to controlling the high-pressure gas in the air tank or the air pump to compress the high pressure and transmit it to the target air spring distribution valve through the air tank distribution valve, so as to transmit the high-pressure gas to the target air spring pressure-maintaining valve through the target air spring distribution valve, and then inflate the target air spring to achieve the lifting of the vehicle body. Since overpressure problems are prone to occur during the inflation of the target air spring, which may cause explosions and endanger personal safety, it is very critical to perform overpressure diagnosis during the inflation of the target air spring.

[0046] In this embodiment, the air spring system can be initialized first and a determination can be made as to whether the air spring system has any faults. If a fault exists, the ASC (Air Suspension Controller) controller will issue a system fault alarm. If no fault exists, the pressure sensor will be used to collect pressure during the inflation of the target air spring to obtain a first pressure value. If the first pressure value is greater than the overpressure threshold, it means that the target air spring may have an overpressure problem. However, the air spring pressure may be affected by working abnormalities of the air spring distribution valve, the air spring pressure maintaining valve, etc. Therefore, the first pressure value is not necessarily the true pressure value of the target air spring. Therefore, this embodiment will further determine whether the installation of the target air spring distribution valve or the target air spring pressure maintaining valve pipeline is normal to eliminate the influence of working abnormalities of the air spring distribution valve, the air spring pressure maintaining valve, etc. on the air spring pressure. Among them, first, the inflation action of the target air spring is controlled to be stopped, that is, the inflation of the target air spring is stopped to avoid further increase in pressure, thereby preventing the air spring from exploding.

[0047] Furthermore, in one embodiment, the method further includes: when it is detected that the first pressure value collected by the pressure sensor in the air spring system is not greater than a preset overpressure threshold, controlling the target air spring to continue to be in an inflated state to achieve a lifting operation of the target air spring.

[0048] Exemplarily, in this embodiment, if the pressure value collected by the pressure sensor is not detected to be greater than the over-pressure threshold during the inflation process of the target empty spring, it means that the target empty spring does not have an over-pressure problem at this time. Therefore, the target empty spring will be controlled to continue to be inflated, that is, the inflation and lifting action of the target empty spring will continue to be completed to ensure that the target empty spring can be lifted normally.

[0049] Step S20: Control the pressure relief valve to be in an open state, close the pressure relief valve after being open for a preset time, and control the target air spring distribution valve to be in an open state to obtain a second pressure value.

[0050] For example, it should be noted that the specific value of the preset opening time can be determined according to the actual needs of different vehicle models or through experimental calibration. It is not limited here, as long as the pressure in the pipeline can be completely or substantially relieved after the pressure relief valve is opened for the preset opening time, for example, the preset opening time is set to 3s.

[0051] In this embodiment, in order to eliminate the influence of abnormal working of the air spring distribution valve, the air spring pressure-maintaining valve, etc. on the air spring pressure, the pressure relief valve is controlled to be in an open state and is continuously opened for a preset opening time of 3s to unload the high-pressure gas in the pipeline, and then the pressure relief valve is closed; then the target air spring distribution valve is controlled to be in an open state, and the pressure is continuously collected through the pressure sensor to obtain a second pressure value; it should be understood that if the target air spring distribution valve and the target air spring pressure-maintaining valve pipeline installation are both fault-free at this time (that is, the target air spring distribution valve can be opened normally and the target air spring pressure-maintaining valve pipeline installation is normal), then under normal circumstances, the pressure in the target air spring will be transmitted to the pipeline, that is, the pressure in the pipeline comes from the target air spring, and the second pressure value obtained at this time is the pressure value of the target air spring. In other words, the pipeline pressure collected by the pressure sensor should be relatively large. Therefore, this embodiment can diagnose whether the target air spring distribution valve and the target air spring pressure-maintaining valve pipeline are normal and whether the target air spring does have an overpressure problem by the size of the second pressure value obtained.

[0052] Step S30: If it is detected that the second pressure value is not less than a preset first pressure threshold, it is determined that the target empty spring is in an overpressure state, wherein the first pressure threshold is less than the overpressure threshold.

[0053] For example, it should be noted that the first pressure threshold refers to the threshold used to determine whether the target air spring distribution valve and the target air spring pressure maintaining valve pipelines are installed normally. The specific value setting can be determined according to the actual needs of different vehicle models or through experimental calibration. It is not limited here, as long as the first pressure threshold is less than the overpressure threshold. Of course, in order to further improve the accuracy of diagnosis, it is preferred to control the difference between the first pressure threshold and the overpressure threshold to be as large as possible, such as setting the first pressure threshold to 3 bar.

[0054] In this embodiment, if the second pressure value is not less than the first pressure threshold, it means that the target air spring distribution valve and the target air spring pressure-maintaining valve pipelines are installed normally, so that the pressure in the target air spring can be normally transmitted to the pipeline, which further proves that the first pressure value and the second pressure value are the real pressure values ​​of the target air spring at different stages; and because the first pressure value is greater than the overpressure threshold, it means that the target air spring does have an overpressure problem, so it can be directly determined that the target air spring is in an overpressure state, and the ASC controller will warn that the target air spring is in an overpressure state. It can be seen that this embodiment can effectively eliminate the influence of abnormal working of the air spring distribution valve and the air spring pressure-maintaining valve on the air spring overpressure diagnosis, so as to achieve accurate diagnosis of air spring overpressure.

[0055] Furthermore, in one embodiment, after the step of controlling the target empty spring distribution valve to be in an open state to obtain a second pressure value, the method further includes:

[0056] If it is detected that the second pressure value is less than the first pressure threshold, the air pump and the target air spring distribution valve are controlled to be in an open state to inflate the target air spring;

[0057] Obtain a third pressure value within a preset inflation time to determine the fault diagnosis results of the target air spring distribution valve and the target air spring pressure maintaining valve pipeline based on the size relationship between the third pressure value and a preset second pressure threshold, wherein the second pressure threshold is greater than the overpressure threshold.

[0058] For example, it should be noted that the specific value setting of the preset inflation time can be determined according to the actual needs of different models or through experimental calibration, and is not limited here, as long as the preset inflation time can limit the pressure change after inflation to a short time, such as setting the preset inflation time to 7s; in addition, the second pressure threshold refers to the value used to judge whether the pressure change after inflation in a short time is normal, and its specific value setting can be determined according to the actual needs of different models or through experimental calibration, and is not limited here, as long as the second pressure threshold is greater than the overpressure threshold, such as setting the second pressure threshold to 18bar.

[0059] In this embodiment, if the second pressure value is less than the first pressure threshold, it means that there is an abnormality in the installation of the target air spring distribution valve or the target air spring pressure-maintaining valve pipeline. It should be understood that if the target air spring distribution valve is abnormal, it will lead to the inability to inflate the target air spring. Then the first pressure value collected by the pressure sensor is not the actual pressure value of the target air spring, but the pressure in the pipeline. However, since the pressure relief valve is opened in step S20, the high-pressure gas in the pipeline is discharged into the atmosphere, which causes the pipeline pressure to drop. Therefore, the second pressure value collected by the pressure sensor is the pipeline pressure value, which causes the second pressure value to be less than the first pressure threshold. It should be noted that if the air spring pressure-maintaining valve pipeline is not assembled, it will be a one-way valve, that is, it can only inflate the air spring, and if the air spring pressure-maintaining valve pipeline is assembled, it will be a two-way valve, that is, it can inflate and deflate the air spring; therefore, if the target air spring distribution valve is normal but the target air spring pressure-maintaining valve pipeline is installed abnormally, the pressure in the target air spring will not be discharged into the pipeline, so that the pressure in the pipeline is very low, so the first pressure value collected by the pressure sensor is the actual pressure value of the target air spring and the second pressure value is the pipeline pressure value, resulting in the second pressure value being less than the first pressure threshold.

[0060] Therefore, it is necessary to further diagnose whether the target air spring distribution valve is faulty or the target air spring pressure-maintaining valve pipeline installation is faulty. Specifically, the air pump and the target air spring distribution valve can be controlled to be in an open state to inflate the target air spring for a preset inflation time of 7 seconds, and the corresponding third pressure value is obtained through the pressure sensor, and then based on the magnitude relationship between the third pressure value and the second pressure threshold of 18 bar, it can be determined whether the target air spring distribution valve is faulty or the target air spring pressure-maintaining valve pipeline is faulty.

[0061] Further, in one embodiment, the fault diagnosis result of the target air spring distribution valve and the target air spring pressure-maintaining valve pipeline is determined based on the magnitude relationship between the third pressure value and the preset second pressure threshold, including:

[0062] If the third pressure value is greater than the second pressure threshold, it is determined that the target air spring distribution valve is faulty;

[0063] If the third pressure value is not greater than the second pressure threshold, it is determined that there is a fault in the target air spring pressure-maintaining valve pipeline and the target air spring is in an overpressure state.

[0064] Exemplarily, in this embodiment, if the third pressure value is greater than the second pressure threshold, it proves that the target air spring distribution valve is not opened normally, so that all the gas is blocked in the pipeline, so that the gas pressure can increase rapidly in a short time, so the ASC controller will alarm the target air spring distribution valve failure, but will not report the target air spring overpressure; and if the third pressure value is not greater than the second pressure threshold, it proves that the target air spring distribution valve is opened normally, that is, the target air spring can be inflated normally, but the target air spring pressure cannot be detected separately, indicating that the target air spring pressure maintaining valve is not installed in place, because the target air spring pressure maintaining valve is not installed in place, which will cause the gas to be unable to enter the pressure sensor, and then cause the pressure sensor to be unable to collect the pressure of the target air spring, so it can be determined that the target air spring pressure maintaining valve is not installed in place, so the ASC control will alarm the target air spring overpressure and the target air spring pressure maintaining valve pipeline is not installed in place; at the same time, it can also send a prompt to the instrument so that the staff can promptly check the assembly of the target air spring pressure maintaining valve pipeline.

[0065] Furthermore, in one embodiment, after the step of determining whether the target empty spring is in an overpressure state, the method further includes:

[0066] Controlling the pressure relief valve and the target empty spring distribution valve to be in an open state to exhaust the target empty spring;

[0067] When the pressure in the target empty spring is reduced to a preset overpressure recovery threshold, the exhaust operation is controlled to be in a stopped state so that the target empty spring is in a non-overpressure state.

[0068] For example, it should be noted that the overpressure recovery threshold refers to the value used to determine whether the target air spring pressure has returned to normal. The specific value setting can be determined according to the actual needs of different models or determined through experimental calibration. It is not limited here. For example, the overpressure recovery threshold is set to 10bar. In this embodiment, when the ASC controller alarms that the target air spring is over-pressured, the pressure relief valve and the target air spring distribution valve will be opened to exhaust the target air spring; then the pressure value of the target air spring can be detected every certain period of time (such as 10s). Once it is detected that the pressure in the target air spring is greater than the overpressure recovery threshold of 10bar, it means that the target air spring pressure has returned to normal (that is, it has dropped to the normal range), then the target air spring can be stopped from being exhausted, that is, the pressure relief valve and the target air spring distribution valve are closed. At this time, the target air spring no longer has an under-pressure problem, so the setting of the target air spring over-pressure state can be cancelled.

[0069] It is understandable that, when implementing the air spring overpressure diagnosis traditionally, only the pressure value of the pressure sensor is detected, which cannot rule out the possibility of a distribution valve failure, resulting in possible misdiagnosis, and therefore there is a problem of low diagnostic accuracy; in addition, it can only detect that the pressure value of the pressure sensor is too high, but cannot accurately locate whether it is a distribution valve failure or an abnormal assembly failure of the pressure maintaining valve, and cannot accurately locate whether it is really an air spring overpressure, so there is also a problem of small diagnostic coverage.

[0070] The present embodiment can not only realize accurate diagnosis of overpressure of empty springs to avoid false alarm of overpressure of empty springs, and can timely exhaust air when the empty springs are overpressured to control their pressure within a normal range, but also improve the diagnostic coverage, that is, it can simultaneously correctly diagnose the assembly failure of the distribution valve and the pressure-maintaining valve pipeline, so that workers can quickly locate the cause of the problem and eliminate it in a targeted manner. In addition, the control logic of the overpressure diagnosis of empty springs involved in the present embodiment can be encapsulated in the ASC controller, so that the ASC can intelligently detect whether there is an overpressure problem in the empty spring and whether the related valves are working properly, so as to avoid manual inspection and disassembly that consumes a lot of man-hours, and can quickly locate the cause of the problem, thereby avoiding the problem of repeated disassembly without being able to locate the cause of the failure, thereby saving a lot of after-sales man-hours.

[0071] In a second aspect, an embodiment of the present application also provides an empty spring overpressure diagnostic device.

[0072] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the air spring overpressure diagnostic device of the present application. Figure 2 As shown, the empty spring overpressure diagnostic device includes:

[0073] A detection control module is used for controlling the stopping of the inflation action of the target air spring when it is detected that the first pressure value collected by the pressure sensor in the air spring system is greater than a preset overpressure threshold value during the inflation process of the target air spring; controlling the pressure relief valve to be in an open state, closing the pressure relief valve after the preset opening time, and controlling the target air spring distribution valve to be in an open state to obtain a second pressure value;

[0074] An overpressure diagnostic module is used to determine that the target empty spring is in an overpressure state if it is detected that the second pressure value is less than a preset first pressure threshold, wherein the first pressure threshold is less than the overpressure threshold.

[0075] Furthermore, in one embodiment, the detection control module is also used to control the air pump and the target air spring distribution valve to be in an open state to inflate the target air spring if it is detected that the second pressure value is not less than the first pressure threshold; the overpressure diagnosis module is also used to obtain a third pressure value within a preset inflation time, so as to determine the fault diagnosis result of the target air spring distribution valve and the target air spring pressure maintaining valve pipeline based on the size relationship between the third pressure value and the preset second pressure threshold, and the second pressure threshold is greater than the overpressure threshold.

[0076] Furthermore, in one embodiment, the overvoltage diagnosis module is specifically used for:

[0077] If the third pressure value is greater than the second pressure threshold, it is determined that the target air spring distribution valve is faulty;

[0078] If the third pressure value is not greater than the second pressure threshold, it is determined that there is a fault in the target air spring pressure-maintaining valve pipeline and the target air spring is in an overpressure state.

[0079] Furthermore, in one embodiment, the empty spring overvoltage diagnosis device further includes an overvoltage recovery module, which is used to:

[0080] Controlling the pressure relief valve and the target empty spring distribution valve to be in an open state to exhaust the target empty spring;

[0081] When the pressure in the target empty spring is reduced to a preset overpressure recovery threshold, the exhaust operation is controlled to be in a stopped state so that the target empty spring is in a non-overpressure state.

[0082] Furthermore, in one embodiment, the detection control module is also used to: when it is detected that the first pressure value collected by the pressure sensor in the air spring system is not greater than a preset over-pressure threshold, control the target air spring to continue to be inflated state to achieve the lifting operation of the target air spring.

[0083] Among them, the functional implementation of each module in the above-mentioned air spring overpressure diagnostic device corresponds to the various steps in the above-mentioned air spring overpressure diagnostic method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0084] In a third aspect, an embodiment of the present application provides an air spring overpressure diagnostic device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0085] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the empty spring overpressure diagnosis device involved in the embodiment of the present application. In the embodiment of the present application, the empty spring overpressure diagnosis device may include a processor, a memory, a communication interface and a communication bus.

[0086] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0087] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the air spring overpressure diagnosis device, and the interface used to realize the interconnection of the air spring overpressure diagnosis device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0088] 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.

[0089] The processor may be a general-purpose processor, which may call the empty spring overpressure diagnostic program stored in the memory and execute the empty spring overpressure diagnostic method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the empty spring overpressure diagnostic program is called may refer to the various embodiments of the empty spring overpressure diagnostic method of the present application, which will not be repeated here.

[0090] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0091] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0092] An empty spring overpressure diagnostic program is stored on the readable storage medium of the present application, wherein when the empty spring overpressure diagnostic program is executed by the processor, the steps of the empty spring overpressure diagnostic method as described above are implemented.

[0093] Among them, the method implemented when the empty spring overpressure diagnosis program is executed can refer to the various embodiments of the empty spring overpressure diagnosis method of the present application, and will not be repeated here.

[0094] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0095] 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 "first", "second" and "third" to different types.

[0096] In the description of the embodiments of the present application, "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 the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0097] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “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.

[0098] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0099] 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 a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially 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, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0100] The above are only preferred embodiments of the present application, and are not intended to 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 overpressure of an empty spring, characterized in that: The empty spring overpressure diagnosis method comprises: During the inflation process of the target empty spring, when it is detected that the first pressure value collected by the pressure sensor in the empty spring system is greater than a preset overpressure threshold, the inflation action of the target empty spring is stopped; Control the pressure relief valve to be in an open state, close the pressure relief valve after being continuously opened for a preset time, and control the target air spring distribution valve to be in an open state to obtain a second pressure value; If it is detected that the second pressure value is not less than a preset first pressure threshold, it is determined that the target empty spring is in an overpressure state, wherein the first pressure threshold is less than the overpressure threshold.

2. The method for diagnosing an overpressure of an empty spring as claimed in claim 1, characterized in that: After the step of controlling the target empty spring distribution valve to be in an open state to obtain a second pressure value, the method further includes: If it is detected that the second pressure value is less than the first pressure threshold, the air pump and the target air spring distribution valve are controlled to be in an open state to inflate the target air spring; Obtain a third pressure value within a preset inflation time to determine the fault diagnosis results of the target air spring distribution valve and the target air spring pressure maintaining valve pipeline based on the size relationship between the third pressure value and a preset second pressure threshold, wherein the second pressure threshold is greater than the overpressure threshold.

3. The method for diagnosing overpressure of an empty spring as claimed in claim 2, characterized in that: The method of determining the fault diagnosis results of the target air spring distribution valve and the target air spring pressure-maintaining valve pipeline based on the magnitude relationship between the third pressure value and the preset second pressure threshold value includes: If the third pressure value is greater than the second pressure threshold, it is determined that the target air spring distribution valve is faulty; If the third pressure value is not greater than the second pressure threshold, it is determined that there is a fault in the target air spring pressure-maintaining valve pipeline and the target air spring is in an overpressure state.

4. The method for diagnosing overpressure of an empty spring according to any one of claims 1 to 3, characterized in that: After the step of determining that the target empty spring is in an overpressure state, the method further includes: Controlling the pressure relief valve and the target empty spring distribution valve to be in an open state to exhaust the target empty spring; When the pressure in the target empty spring is reduced to a preset overpressure recovery threshold, the exhaust operation is controlled to be in a stopped state so that the target empty spring is in a non-overpressure state.

5. The method for diagnosing overpressure of an empty spring according to claim 1, characterized in that: The method further comprises: When it is detected that the first pressure value collected by the pressure sensor in the air spring system is not greater than the preset overpressure threshold, the target air spring is controlled to continue to be in an inflated state to achieve a lifting operation of the target air spring.

6. An empty spring overpressure diagnostic device, characterized in that: The empty spring overpressure diagnostic device comprises: A detection control module is used for controlling the stopping of the inflation action of the target air spring when it is detected that the first pressure value collected by the pressure sensor in the air spring system is greater than a preset overpressure threshold value during the inflation process of the target air spring; controlling the pressure relief valve to be in an open state, closing the pressure relief valve after the preset opening time, and controlling the target air spring distribution valve to be in an open state to obtain a second pressure value; An overpressure diagnostic module is used to determine that the target empty spring is in an overpressure state if it is detected that the second pressure value is less than a preset first pressure threshold, wherein the first pressure threshold is less than the overpressure threshold.

7. The empty spring overpressure diagnostic device according to claim 6, characterized in that: The detection control module is further configured to control the air pump and the target empty spring distribution valve to be in an open state to inflate the target empty spring if it is detected that the second pressure value is not less than the first pressure threshold; The overpressure diagnostic module is also used to obtain a third pressure value within a preset inflation time, so as to determine the fault diagnosis results of the target air spring distribution valve and the target air spring pressure maintaining valve pipeline based on the size relationship between the third pressure value and a preset second pressure threshold, and the second pressure threshold is greater than the overpressure threshold.

8. The empty spring overpressure diagnostic device according to claim 7, characterized in that: The overvoltage diagnosis module is specifically used for: If the third pressure value is greater than the second pressure threshold, it is determined that the target air spring distribution valve is faulty; If the third pressure value is not greater than the second pressure threshold, it is determined that there is a fault in the target air spring pressure-maintaining valve pipeline and the target air spring is in an overpressure state.

9. An empty spring overpressure diagnostic device, characterized in that: The air spring overpressure diagnostic device includes a processor, a memory, and an air spring overpressure diagnostic program stored in the memory and executable by the processor, wherein when the air spring overpressure diagnostic program is executed by the processor, the steps of the air spring overpressure diagnostic method as described in any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores an empty spring overpressure diagnostic program, wherein when the empty spring overpressure diagnostic program is executed by a processor, the steps of the empty spring overpressure diagnostic method as described in any one of claims 1 to 5 are implemented.

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