Air suspension distribution valve fault diagnosis method and system

Abstract

The present application discloses an air suspension distribution valve fault diagnosis method and system, the method comprising the following steps: obtaining the air spring adjustment working condition; when the air spring is inflated or deflated, and the suspension height rises or falls, controlling and monitoring to obtain the suspension height change working condition and the distribution valve pipeline pressure value change working condition; through the obtained suspension height and distribution valve pipeline pressure value change working condition, obtain the distribution valve's unconventional fault working condition. The air suspension distribution valve fault diagnosis method provided by the present application can make up for the fault limitation problem identified by the underlying circuit, so that during the use of the air suspension, the distribution valve can be quickly and accurately identified as blocked and unable to be opened, and the driver can be reminded in time to avoid safety risks.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a method and system for diagnosing a fault of an air suspension distribution valve. Background Art

[0002] As air suspension becomes more and more popular in the automotive industry, the diagnosis of air suspension is also a problem. Conventional faults such as open circuit and short circuit of the current distribution valve can be identified through the underlying circuit, but distribution valve blockage, distribution valve non-response and other faults cannot be identified. The air spring adjustment process is monitored through the application layer. When the air spring is lifted or lowered, the distribution valve, air pump, air relief valve, air tank, etc. need to be opened. By detecting the specific lifting and lowering conditions, the changes in pressure and height are judged to confirm whether there is a distribution valve failure.

[0003] The prior art provides an electronically controlled air suspension fault diagnosis simulation system and method, comprising: a fault control unit, a fault simulation unit and a fault diagnosis unit; the fault control unit comprises: a host computer and a PLC controller, the host computer is used to receive the fault state of the fault diagnosis unit, and send a fault command signal to the PLC controller, the PLC controller is used to receive the fault command signal sent by the host computer and pass it to the fault simulation unit; the fault simulation unit is used to simulate the fault of the suspension system; the fault diagnosis unit comprises: an ECU controller, the ECU controller is connected to the fault simulation unit and the fault control unit, the ECU controller is used to detect the fault state of the fault simulation unit and upload the fault state to the host computer for matching with the fault library; the advantages of the present invention are: the fault command is input by the host computer, and the ECU controller performs fault diagnosis, which basically covers all air suspension system failure modes and is convenient for the software optimization of the electronically controlled air suspension system.

[0004] The prior art provides a control system and control method for an air spring, wherein the control system includes: a signal input module, a main control module and an integrated air source module; the integrated air source module includes an integrated sub-control unit and multiple actuators; the signal input module collects the source signal of the vehicle, and processes the source signal to obtain the vehicle signal; the main control module generates a control instruction according to the vehicle signal and sends it to the integrated air source module; the sub-control unit controls multiple actuators according to the control instruction to control the inflation and deflation of the air spring. In this way, the layout space of the control system can be saved and the assembly process can be simplified by the sub-control unit and multiple actuators integrated in the integrated air source module; the main control module responsible for the overall algorithm under the system architecture and the sub-control unit that executes the action according to the control instruction can cooperate with each other on the basis of their independent operation, so that the functions of the control system are complete and clearly divided.

[0005] However, the above technical contents do not involve the diagnosis of unconventional faults of the air suspension distribution valve. Summary of the invention

[0006] The purpose of this application is to overcome the deficiencies of the above-mentioned background technology and to provide an air suspension distribution valve fault diagnosis method and system.

[0007] In a first aspect, the present application provides a method for diagnosing a fault of an air suspension distribution valve.

[0008] Get the air spring adjustment condition;

[0009] When the air spring is inflated or deflated, and the suspension height rises or falls, the control monitoring obtains the change condition of the suspension height and the change condition of the distribution valve pipeline pressure value;

[0010] By obtaining the change conditions of the suspension height and the distribution valve pipeline pressure value, the unconventional fault condition of the distribution valve is obtained.

[0011] According to the first aspect, in a first possible implementation manner of the first aspect, the air spring adjustment condition includes an inflation / deflation condition of the air spring and a currently acting inflation / deflation component.

[0012] According to the first aspect, in a second possible implementation of the first aspect, when the air spring is inflated or deflated and the suspension height rises or falls, the step of controlling, monitoring and obtaining the suspension height change condition and the distribution valve pipeline pressure value change condition specifically includes the following steps:

[0013] When the air spring is inflated, if the change value of the suspension height is continuously less than the preset change value and the pressure value of the distribution valve pipeline is continuously greater than the upper pressure limit setting value, it is determined that the air suspension distribution valve has an abnormal fault;

[0014] When the air spring is deflated, the suspension height change value is continuously less than the preset change value, and the distribution valve pipeline pressure value is continuously less than the pressure lower limit setting value, it is determined that an abnormal fault exists in the air suspension distribution valve.

[0015] According to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, when the air spring is inflated, the suspension height change value is continuously less than the preset change value, and the distribution valve pipeline pressure value is continuously greater than the pressure upper limit setting value, the step of determining that the air suspension distribution valve has an unconventional fault specifically includes the following steps:

[0016] When the air pump inflates the air spring, if the change value of the suspension height is less than the preset change value and the pressure value of the distribution valve pipeline is greater than the first upper limit pressure setting value, it is determined that the air suspension distribution valve has an unusual fault;

[0017] When the air tank inflates the air spring, the suspension height change value is less than the preset change value, the distribution valve pipeline pressure value is greater than the second upper limit pressure setting value, and this state lasts for a first preset time, it is determined that the air suspension distribution valve has an unusual fault.

[0018] According to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, when the air spring is deflated, the suspension height change value is continuously less than the preset change value, and the distribution valve pipeline pressure value is continuously less than the pressure lower limit setting value, the step of determining that the air suspension distribution valve has an unconventional fault specifically includes the following steps:

[0019] When the air release valve releases air to the air spring, the suspension height change value is less than the preset change value, the distribution valve pipeline pressure value is less than the lower pressure limit setting value, and this state lasts for a second preset time, it is determined that the air suspension distribution valve has an unusual fault.

[0020] According to the first aspect, in a fifth possible implementation of the first aspect, when the air spring is inflated or deflated and the suspension height rises or falls, after the step of controlling and monitoring to obtain the suspension height change condition and the distribution valve pipeline pressure value change condition, the following steps are also included:

[0021] When it is obtained that any of the currently acting inflation and deflation components or the distribution valve is closed, the control exits the monitoring state of the suspension height change condition and the distribution valve pipeline pressure value change condition.

[0022] According to the first aspect, in a sixth possible implementation manner of the first aspect, the non-routine fault of the dispensing valve includes a dispensing valve blockage and a dispensing valve non-response fault.

[0023] In a second aspect, the present application provides an air suspension distribution valve fault diagnosis system, comprising:

[0024] An adjustment condition acquisition module is used to obtain the adjustment condition of the air spring;

[0025] A monitoring module is connected to the adjustment working condition acquisition module for controlling, monitoring and acquiring the working condition of the suspension height change and the working condition of the distribution valve pipeline pressure value change when the air spring is inflated or deflated and the suspension height rises or falls;

[0026] The distribution valve fault diagnosis module is connected to the monitoring module for obtaining the abnormal fault condition of the distribution valve by obtaining the change condition of the rated suspension height and the distribution valve pipeline pressure value.

[0027] According to the second aspect, in a first possible implementation manner of the second aspect, the monitoring module includes:

[0028] The inflation condition monitoring submodule is communicatively connected with the adjustment condition acquisition module, and is used to determine that an unconventional fault exists in the air suspension distribution valve when the suspension height change value is continuously less than the preset change value and the distribution valve pipeline pressure value is continuously greater than the pressure upper limit setting value when the air spring is inflated;

[0029] The deflation condition monitoring submodule is communicatively connected to the adjustment condition acquisition module, and is used to determine that an abnormal fault exists in the air suspension distribution valve when the air spring is deflated, the suspension height change value is continuously less than the preset change value, and the distribution valve pipeline pressure value is continuously less than the pressure lower limit setting value.

[0030] According to a first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the inflation condition monitoring submodule includes:

[0031] a first inflation working condition monitoring unit, which is in communication with the adjustment working condition acquisition module, and is used to determine that an unconventional fault exists in the air suspension distribution valve when the suspension height change value is less than a preset change value and the distribution valve pipeline pressure value is greater than a first upper limit pressure setting value when the air pump inflates the air spring;

[0032] The second inflation condition monitoring unit is communicatively connected to the adjustment condition acquisition module, and is used to determine that an unusual fault exists in the air suspension distribution valve when, when the air tank inflates the air spring, the suspension height change value is less than a preset change value, the distribution valve pipeline pressure value is greater than a second upper limit pressure setting value, and this state lasts for a first preset time.

[0033] Compared with the prior art, the advantages of this application are as follows:

[0034] The air suspension distribution valve fault diagnosis method provided in the present application can make up for the distribution valve fault limitation problem identified by the underlying circuit, so that during the use of the air suspension, the distribution valve blockage and the inability to open faults can be quickly and accurately identified, and the driver can be reminded in time to avoid driving safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A method flow chart of a method for diagnosing a fault of an air suspension distribution valve provided in this application;

[0036] Figure 2 A functional module block diagram of an air suspension distribution valve fault diagnosis system provided in an embodiment of the present application;

[0037] Figure 3 Another method flow chart of the air suspension distribution valve fault diagnosis method provided in the embodiment of the present application;

[0038] Figure 4Another functional module block diagram of the air suspension distribution valve fault diagnosis system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the embodiments described. On the contrary, it is intended to cover changes, modifications and equivalents included in the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can all be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0040] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Note: The example to be introduced below is only a specific example, and is not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequences, etc. Those skilled in the art can apply the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0042] Currently, conventional faults of the air suspension distribution valve can be identified by the underlying circuit, but the underlying circuit cannot identify unconventional faults of the air suspension distribution valve.

[0043] First, please refer to Figure 1 The present application provides a method for diagnosing a fault of an air suspension distribution valve, which specifically comprises the following steps:

[0044] Step S1, when a vehicle height adjustment request instruction is received, obtaining an air spring adjustment condition;

[0045] Step S2, when the air spring is inflated or deflated and the suspension height rises or falls, control monitoring to obtain the suspension height change condition and the distribution valve pipeline pressure value change condition;

[0046] Step S3, obtaining the abnormal fault condition of the distribution valve by obtaining the change condition of the suspension height and the pressure value of the distribution valve pipeline, wherein the abnormal fault of the distribution valve includes the blockage of the distribution valve that cannot be identified by the underlying circuit, the non-response of the distribution valve, etc.

[0047] The air suspension distribution valve fault diagnosis method provided in the present application can make up for the distribution valve fault limitation problem identified by the underlying circuit, so that during the use of the air suspension, the distribution valve blockage and the inability to open faults can be quickly and accurately identified, and the driver can be reminded in time to avoid driving safety risks.

[0048] In one embodiment, the air spring adjustment working condition includes the air spring inflation and deflation working condition and the currently acting inflation and deflation components. The air spring inflation working condition includes inflation of the air spring and deflation of the air spring, and the current inflation and deflation components include an air pump, an air tank or an air deflation valve. More specifically, the air spring adjustment working condition specifically includes the following working conditions:

[0049] 1) The air pump inflates the air spring;

[0050] 2) The air tank inflates the air spring;

[0051] 3) The air relief valve releases air from the air spring.

[0052] In one embodiment, different methods for judging the unconventional faults of the distribution valve are provided for different working conditions of the air spring being inflated or deflated. When the air spring is inflated or deflated and the suspension height rises or falls, the control monitoring step of obtaining the working condition of the suspension height change and the working condition of the distribution valve pipeline pressure value change specifically includes the following steps:

[0053] When the air spring is inflated, if the change value of the suspension height is continuously less than the preset change value and substantially unchanged, and the pressure value of the distribution valve pipeline is continuously greater than the upper pressure limit setting value, it is determined that an abnormal fault exists in the air suspension distribution valve;

[0054] When the air spring is deflated, the suspension height change value is continuously less than the preset change value and basically remains unchanged, and the distribution valve pipeline pressure value is continuously less than the pressure lower limit setting value, it is determined that an abnormal fault exists in the air suspension distribution valve.

[0055] In one embodiment, different methods for judging the abnormal fault of the distribution valve are provided for different currently acting inflation and deflation components when the air spring is inflated. When the suspension height change value is continuously less than the preset change value and the distribution valve pipeline pressure value is continuously greater than the upper pressure limit setting value when the air spring is inflated, the steps for judging that the air suspension distribution valve has an abnormal fault specifically include the following steps:

[0056] When the air pump inflates the air spring, if the change value of the suspension height is less than the preset change value and the pressure value of the distribution valve pipeline is greater than the first upper limit pressure setting value (e.g. 15 bar), it is determined that the air suspension distribution valve has an abnormal fault;

[0057] When the air tank inflates the air spring, when the suspension height change value is less than the preset change value, the distribution valve pipeline pressure value is greater than the second upper limit pressure setting value (for example, 12 bar), and this state lasts for a first preset time, it is determined that the air suspension distribution valve has an abnormal fault.

[0058] In one embodiment, the first upper limit pressure setting value is greater than the second upper limit pressure setting value to accommodate differences in the inflation capacities of the air pump and the air storage tank.

[0059] More specifically, a method for determining an unconventional fault of a distribution valve is provided for when the air spring is deflated. When the air spring is deflated, the change value of the suspension height is continuously less than the preset change value, and the pressure value of the distribution valve pipeline is continuously less than the lower limit setting value of the pressure, the steps of determining that an unconventional fault exists in the air suspension distribution valve specifically include the following steps:

[0060] When the air release valve releases air to the air spring, the suspension height change value is less than the preset change value, the distribution valve pipeline pressure value is less than the lower pressure limit setting value (for example, 1 bar), and this state lasts for a second preset time, it is determined that the air suspension distribution valve has an abnormal fault.

[0061] In one embodiment, when the air spring is inflated or deflated and the suspension height rises or falls, after the step of controlling and monitoring to obtain the suspension height change condition and the distribution valve pipeline pressure value change condition, the following steps are also included:

[0062] When it is obtained that any of the currently functioning inflation and deflation components or the distribution valve is closed, the control exits the monitoring state of the suspension height change condition and the distribution valve pipeline pressure value change condition. Specifically: 1) When the air pump inflates the air spring and the suspension height rises, when the air pump switch signal and the air spring distribution valve switch signal inside the suspension controller are both turned on, the suspension controller enters the monitoring state. At this time, the suspension controller monitors the height value and pressure value. If the height is basically unchanged, and the distribution valve pipeline pressure value rises very quickly and reaches the set upper limit (such as 15bar), the suspension controller determines that the air distribution valve is faulty and reports a distribution valve fault signal. During the monitoring process, if either the air pump or the distribution valve is closed, the monitoring state is exited; 2) When the air tank inflates the air spring and the suspension height rises, when the air tank switch signal and the air spring distribution valve switch signal inside the suspension controller are both turned on, the suspension controller enters the monitoring state. At this time, the suspension controller monitors the height value and pressure value. If the height does not change and the pressure value of the distribution valve pipeline is higher than the set value (such as 12bar) for a period of time, the suspension controller determines that the air distribution valve is faulty and reports a distribution valve fault signal. During the monitoring process, if the air tank or the distribution valve is closed, the monitoring state is exited; 3) When the air release valve releases air to the air spring and the suspension height is reduced, the air release valve switch signal and the air spring distribution valve switch signal inside the suspension controller are both open, and the suspension controller enters the monitoring state. If the suspension height does not change and the pressure value of the distribution valve pipeline is lower than the set value (1bar) for a period of time, the suspension controller determines that the air distribution valve is faulty and reports a distribution valve fault signal. During the monitoring process, if the air release valve or the distribution valve is closed, the monitoring state is exited.

[0063] Second, please refer to Figure 2The present application provides an air suspension distribution valve fault diagnosis system, including an adjustment condition acquisition module 100, a monitoring module 200, and a distribution valve fault diagnosis module 300. The adjustment condition acquisition module 100 is used to obtain the air spring adjustment condition; the monitoring module 200 is connected in communication with the adjustment condition acquisition module, and is used to control and monitor the change condition of the suspension height and the change condition of the distribution valve pipeline pressure value when the air spring is inflated or deflated and the suspension height rises or falls; the distribution valve fault diagnosis module 300 is connected in communication with the monitoring module, and is used to obtain the unconventional fault condition of the distribution valve by obtaining the change condition of the rated suspension height and the distribution valve pipeline pressure value. The air suspension distribution valve fault diagnosis system provided in the present application can make up for the distribution valve fault limitation problem identified by the underlying circuit, so that the air suspension can quickly and accurately identify the distribution valve blockage and the failure to open faults during use, and promptly remind the driver to avoid driving safety risks.

[0064] In one embodiment, if Figure 3 As shown, the adjustment working condition acquisition module is implemented as an air pump switch valve, an air tank switch valve, and an air release valve switch valve. The current specific function of the air spring's filling and deflation components is obtained through the opening and closing states of the corresponding switch valves, thereby obtaining the adjustment working condition of the air spring. The monitoring module is implemented as a left front height sensor, a right front height sensor, a left rear height sensor, a right rear height sensor, and a pressure sensor, thereby obtaining the height change working condition of the suspension and the distribution valve management pressure value change working condition. The distribution valve includes a left front air suspension distribution valve, a right front air suspension distribution valve, a left rear air suspension distribution valve, and a right rear air suspension distribution valve. The distribution valve fault diagnosis module is implemented as a suspension controller.

[0065] In one embodiment, please refer to Figure 4 The monitoring module 200 includes an inflation condition monitoring submodule 210 and a deflation condition monitoring submodule 220. The inflation condition monitoring submodule 210 is communicatively connected with the adjustment condition acquisition module 100, and is used to determine that an air suspension distribution valve has an unconventional fault when the suspension height change value is continuously less than a preset change value and the distribution valve pipeline pressure value is continuously greater than the upper pressure limit setting value when the air spring is inflated; the deflation condition monitoring submodule 220 is communicatively connected with the adjustment condition acquisition module 210, and is used to determine that an air suspension distribution valve has an unconventional fault when the air spring is deflated, the suspension height change value is continuously less than a preset change value and the distribution valve pipeline pressure value is continuously less than the lower pressure limit setting value.

[0066] In one embodiment, the inflation condition monitoring submodule includes a first inflation condition monitoring unit and a second inflation condition monitoring unit. The first inflation condition monitoring unit is communicatively connected to the adjustment condition acquisition module, and is used to determine that an air suspension distribution valve has an unconventional fault when, when the air pump inflates the air spring, the suspension height change value is less than a preset change value, and the distribution valve pipeline pressure value is greater than a first upper limit pressure setting value; the second inflation condition monitoring unit is communicatively connected to the adjustment condition acquisition module, and is used to determine that an air suspension distribution valve has an unconventional fault when, when the air tank inflates the air spring, the suspension height change value is less than a preset change value, and the distribution valve pipeline pressure value is greater than the second upper limit pressure setting value, and this state lasts for a first preset time.

[0067] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0068] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0069] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0070] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0071] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0072] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, servers or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0073] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0074] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0075] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for diagnosing a fault of an air suspension distribution valve, characterized in that: The steps include: Get the air spring adjustment condition; When the air spring is inflated or deflated, and the suspension height rises or falls, the control monitoring obtains the change condition of the suspension height and the change condition of the distribution valve pipeline pressure value; Obtain the unconventional fault condition of the distribution valve by obtaining the change condition of the suspension height and the pressure value of the distribution valve pipeline; When the air spring is inflated or deflated and the suspension height rises or falls, the control monitoring step of obtaining the suspension height change condition and the distribution valve pipeline pressure value change condition specifically includes the following steps: When the air spring is inflated, if the change value of the suspension height is continuously less than the preset change value and the pressure value of the distribution valve pipeline is continuously greater than the upper pressure limit setting value, it is determined that the air suspension distribution valve has an abnormal fault; When the air spring is deflated, the change value of the suspension height is continuously less than the preset change value, and the pressure value of the distribution valve pipeline is continuously less than the lower limit setting value of the pressure, it is determined that the air suspension distribution valve has an abnormal fault; The non-routine faults of the dispensing valve include dispensing valve blockage and dispensing valve non-response faults.

2. The air suspension distribution valve fault diagnosis method according to claim 1, characterized in that: The air spring adjustment working condition includes the inflation and deflation working condition of the air spring and the currently acting inflation and deflation components.

3. The air suspension distribution valve fault diagnosis method according to claim 1, characterized in that: The step of determining that an air suspension distribution valve has an unconventional fault when the suspension height change value is continuously less than a preset change value and the distribution valve pipeline pressure value is continuously greater than the pressure upper limit setting value when the air spring is inflated specifically includes the following steps: When the air pump inflates the air spring, if the change value of the suspension height is less than the preset change value and the pressure value of the distribution valve pipeline is greater than the first upper limit pressure setting value, it is determined that the air suspension distribution valve has an unusual fault; When the air tank inflates the air spring, the suspension height change value is less than the preset change value, the distribution valve pipeline pressure value is greater than the second upper limit pressure setting value, and this state lasts for a first preset time, it is determined that the air suspension distribution valve has an unusual fault.

4. The air suspension distribution valve fault diagnosis method according to claim 1, characterized in that: The step of determining that an air suspension distribution valve has an unconventional fault when the air spring is deflated, the change value of the suspension height is continuously less than the preset change value, and the pressure value of the distribution valve pipeline is continuously less than the lower pressure limit setting value, specifically includes the following steps: When the air release valve releases air to the air spring, the suspension height change value is less than the preset change value, the distribution valve pipeline pressure value is less than the lower pressure limit setting value, and this state lasts for a second preset time, it is determined that the air suspension distribution valve has an unusual fault.

5. The air suspension distribution valve fault diagnosis method according to claim 1, characterized in that: When the air spring is inflated or deflated and the suspension height rises or falls, after the step of controlling and monitoring to obtain the suspension height change condition and the distribution valve pipeline pressure value change condition, the following steps are also included: When it is obtained that any of the currently acting inflation and deflation components or the distribution valve is closed, the control exits the monitoring state of the suspension height change condition and the distribution valve pipeline pressure value change condition.

6. An air suspension distribution valve fault diagnosis system, characterized in that: include: An adjustment condition acquisition module is used to obtain the adjustment condition of the air spring; A monitoring module is connected to the adjustment working condition acquisition module for controlling, monitoring and acquiring the working condition of the suspension height change and the working condition of the distribution valve pipeline pressure value change when the air spring is inflated or deflated and the suspension height rises or falls; A distribution valve fault diagnosis module, which is in communication with the monitoring module and is used to obtain an unconventional fault condition of the distribution valve by obtaining a change condition of the rated suspension height and the distribution valve pipeline pressure value; The monitoring module comprises: The inflation condition monitoring submodule is communicatively connected with the adjustment condition acquisition module, and is used to determine that an unconventional fault exists in the air suspension distribution valve when the suspension height change value is continuously less than the preset change value and the distribution valve pipeline pressure value is continuously greater than the pressure upper limit setting value when the air spring is inflated; The deflation condition monitoring submodule is connected to the regulating condition acquisition module for determining that an abnormal fault exists in the air suspension distribution valve when the air spring is deflated and the suspension height change value is continuously less than a preset change value and the distribution valve pipeline pressure value is continuously less than a pressure lower limit setting value; The non-routine faults of the dispensing valve include dispensing valve blockage and dispensing valve non-response faults.

7. The air suspension distribution valve fault diagnosis system according to claim 6, characterized in that: The inflation condition monitoring submodule includes: a first inflation working condition monitoring unit, which is in communication with the adjustment working condition acquisition module, and is used to determine that an unconventional fault exists in the air suspension distribution valve when the suspension height change value is less than a preset change value and the distribution valve pipeline pressure value is greater than a first upper limit pressure setting value when the air pump inflates the air spring; The second inflation condition monitoring unit is communicatively connected to the adjustment condition acquisition module, and is used to determine that an unusual fault exists in the air suspension distribution valve when, when the air tank inflates the air spring, the suspension height change value is less than a preset change value, the distribution valve pipeline pressure value is greater than a second upper limit pressure setting value, and this state lasts for a first preset time.

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