Method, device and vehicle for judging whether pressure-maintaining valve is assembled in place

Abstract

The present invention discloses a method, device and vehicle for judging whether a pressure-maintaining valve is in place, and relates to the field of vehicle assembly technology. The judgment method includes the following steps: step S10, responding to a judgment instruction to control the conduction of a pressure relief valve and a distribution valve of any air spring; step S20, obtaining the height value of the air spring, and calculating the height change value of the air spring within a preset first time length; step S30, judging whether the pressure-maintaining valve of the air spring is in place based on the height change value of the air spring within the preset first time length. The present invention adopts the above judgment method to automatically judge whether the pressure-maintaining valve of the air spring is in place, without the need to manually check the air pipe markings to judge whether the pressure-maintaining valve is in place, which can avoid the phenomenon of missed judgment as much as possible, and has a high judgment accuracy rate.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle assembly, and in particular to a method and device for judging whether a pressure-maintaining valve is assembled in place, and a vehicle. Background Art

[0002] The pressure-maintaining valve of the air spring plays an important role similar to a one-way valve during the transportation of the air spring, ensuring a certain air pressure inside the air spring during transportation to prevent the bladder from being folded or punctured by sharp objects. At the same time, there is no need to inflate the air spring again during the production stage. After the pressure-maintaining valve and the air pipe of the vehicle's air suspension system are connected and assembled, it is necessary to check whether the pressure-maintaining valve is properly assembled. After the pressure-maintaining valve and the air pipe are properly assembled, it is equivalent to a two-way valve, which can ensure that the gas is smoothly injected into or discharged from the air spring. Figure 1 However, if the pressure-maintaining valve and the air pipe are not properly assembled, the pressure-maintaining valve can only inflate the air spring in one direction but cannot exhaust the air spring, causing the vehicle height to be unable to be lowered normally. Figure 1 As shown on the left, a properly assembled pressure-maintaining valve and air pipe indicate bidirectional operation, while an improperly assembled pressure-maintaining valve and air pipe indicate unidirectional operation. Proper assembly of the pressure-maintaining valve and air pipe significantly impacts the entire vehicle's air suspension system; improper assembly can cause the vehicle's air suspension system to malfunction.

[0003] Because the pressure-maintaining valve is a mechanical component, its proper assembly cannot be determined through electrical characteristics. Existing technology typically involves manually inspecting the markings on the air pipe to determine if the pressure-maintaining valve is properly assembled. However, manual inspections are prone to haphazardness, leading to missed inspections and low accuracy. Summary of the Invention

[0004] The embodiments of the present invention provide a method, device and vehicle for determining whether a pressure-maintaining valve is in place, so as to solve the technical problems in the related art of manually checking the air pipe markings to determine whether the pressure-maintaining valve is in place, resulting in missed judgments and low judgment accuracy.

[0005] In a first aspect, a method for determining whether a pressure-maintaining valve is properly assembled is provided, comprising the following steps:

[0006] In response to the judgment instruction, the pressure relief valve and the distribution valve of any air spring are controlled to be turned on;

[0007] Obtaining a height value of the air spring and calculating a height change value of the air spring within a preset first time period;

[0008] Whether the pressure-maintaining valve of the air spring is assembled in place is determined according to a height change value of the air spring within a preset first time period.

[0009] In some embodiments, the step of determining whether the pressure-maintaining valve of the air spring is properly assembled based on a height change value of the air spring within a preset first time period includes:

[0010] Determining whether a height change value of the air spring within a preset first time period is greater than a preset first height threshold;

[0011] If yes, determine whether the pressure-maintaining valve of the air spring is properly installed; if not, check whether the pressure relief valve and the distribution valve of the air spring are normal;

[0012] If so, it is determined that the pressure maintaining valve of the air spring is not properly assembled.

[0013] In some embodiments, the step of detecting whether the pressure relief valve and the distribution valve of the air spring are both normal includes:

[0014] Control the pressure relief valve to close and the distribution valve of the air spring to conduct;

[0015] Control the opening of the air pump or the opening of the gas tank and the conduction of the distribution valve of the gas tank;

[0016] Obtaining a height value of the air spring and calculating a height change value of the air spring within a preset second time period;

[0017] Determining whether a height change value of the air spring within a preset second time period is greater than a preset second height threshold;

[0018] If yes, it is determined that the distribution valve of the air spring is normal; if not, it is determined that the distribution valve of the air spring is abnormal.

[0019] In some embodiments, after the step of determining whether the air spring distribution valve is normal, the method further includes:

[0020] The pressure relief valve is controlled to be opened for a preset third time period and then controlled to be closed, and it is determined whether the pressure value in the pipeline is less than a preset pressure threshold value;

[0021] If yes, the pressure relief valve is normal; if no, the pressure relief valve is abnormal.

[0022] In some embodiments, the step of determining whether the height change value of the air spring within the preset second time period is greater than a preset second height threshold includes:

[0023] When the preset second time duration is 5s, the preset second height threshold is not less than 8mm.

[0024] In some embodiments, the step of determining whether the height change value of the air spring within a preset first time period is greater than a preset first height threshold includes:

[0025] When the preset first time duration is 15 seconds, the preset first height threshold is not less than 5 mm.

[0026] In some embodiments, if so, after the step of determining that the pressure-maintaining valve of the air spring is not properly assembled, the method further includes:

[0027] Generate a fault alarm signal and send it to the instrument display for display.

[0028] In some embodiments, after the step of detecting whether the pressure relief valve and the distribution valve of the air spring are both normal, the method further includes:

[0029] If not, replace the pressure relief valve and / or the air spring distribution valve until it is detected that the pressure relief valve and the air spring distribution valve are normal.

[0030] In a second aspect, a device for determining whether a pressure-maintaining valve is properly assembled is provided, comprising a vehicle controller, the vehicle controller comprising:

[0031] A response unit, which is used to control the conduction of the pressure relief valve and the distribution valve of any air spring in response to the judgment instruction;

[0032] a calculation unit, configured to obtain a height value of the air spring and calculate a height change value of the air spring within a preset first time period;

[0033] A judging unit is used to judge whether the pressure-maintaining valve of the air spring is assembled in place according to a height change value of the air spring within a preset first time period.

[0034] According to a third aspect, a vehicle is provided, comprising a device for determining whether the aforementioned pressure-maintaining valve is in place.

[0035] The beneficial effects brought about by the technical solution provided by the present invention include:

[0036] Embodiments of the present invention provide a method, device, and vehicle for determining whether a pressure-maintaining valve is properly installed. The method first controls the conduction of a pressure relief valve and a distribution valve of any air spring in response to a judgment instruction, then obtains the height value of the air spring and calculates the height change of the air spring within a preset first time period. Finally, based on the height change of the air spring within the preset first time period, it determines whether the pressure-maintaining valve of the air spring is properly installed. The present invention can automatically determine whether the pressure-maintaining valve of the air spring is properly installed through a vehicle controller, eliminating the need to manually check the air pipe markings to determine whether the pressure-maintaining valve is properly installed. This method can minimize missed judgments and achieve a high judgment accuracy rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 This is a schematic diagram of the assembly of the pressure-maintaining valve and the air pipe;

[0039] Figure 2 A flow chart of a method for determining whether a pressure-maintaining valve is properly assembled according to an embodiment of the present invention;

[0040] Figure 3 Implementation provided by the embodiment of the present invention Figure 1 A flow chart of step S30;

[0041] Figure 4 A schematic diagram of a vehicle air suspension system provided by an embodiment of the present invention;

[0042] Figure 5 Implementation provided by the embodiment of the present invention Figure 2 A flow chart of step S302;

[0043] Figure 6 Implementation provided by the embodiment of the present invention Figure 2 Another flow chart of step S302;

[0044] Figure 7 Another flow chart of a method for determining whether a pressure-maintaining valve is properly assembled provided by an embodiment of the present invention;

[0045] Figure 8 A schematic structural diagram of a device for determining whether a pressure-maintaining valve is properly assembled, provided by an embodiment of the present invention;

[0046] In the picture:

[0047] 1. Pressure maintaining valve; 2. Air pipe; 3. Air spring; 4. Pressure relief valve; 5. Distribution valve; 6. Air pump; 7. Air storage tank. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0049] An embodiment of the present invention provides a method for determining whether a pressure-maintaining valve is in place, which can solve the technical problems of the prior art of manually checking the trachea markings to determine whether the pressure-maintaining valve is in place, resulting in missed judgments and low judgment accuracy.

[0050] See also Figure 2 As shown, an embodiment of the present invention provides a method for determining whether a pressure-maintaining valve is properly assembled, comprising the following steps:

[0051] Step S10 , in response to the judgment instruction, the pressure relief valve and the distribution valve of any air spring are controlled to be turned on.

[0052] Specifically, the pressure relief valve and the distribution valve of any air spring are connected to the vehicle controller. When the vehicle controller receives an instruction to determine whether the pressure holding valve is assembled in place, it controls the pressure relief valve and the distribution valve of any air spring to be turned on.

[0053] Step S20: obtaining the height value of the air spring and calculating the height change value of the air spring within a preset first time period.

[0054] Specifically, a height sensor is provided at any air spring, which can collect the height value of the corresponding air spring and output the collected height value to the vehicle controller, and then the vehicle controller can calculate the height change value of the air spring within a preset first time length.

[0055] Step S30 , judging whether the pressure-maintaining valve of the air spring is properly assembled based on the height change value of the air spring within a preset first time period.

[0056] Specifically, see Figure 3 As shown, the step of judging whether the pressure-maintaining valve of the air spring is properly assembled based on the height change value of the air spring within a preset first time period includes:

[0057] Step S301: Determine whether a height change value of the air spring within a preset first time period is greater than a preset first height threshold.

[0058] Step S302: If yes, determine whether the pressure-maintaining valve of the air spring is properly assembled; if not, check whether the pressure relief valve and the distribution valve of the air spring are both normal.

[0059] Step S303: If yes, determine that the pressure-maintaining valve of the air spring is not properly assembled.

[0060] Optionally, the preset first time duration is not less than 15 seconds, and the preset first height threshold is not less than 5 mm. Figure 4As shown, taking the leftmost air spring as an example, the preset first time duration is 15 seconds, and the preset first height threshold is 5 mm. When it is necessary to determine whether the pressure-maintaining valve of the leftmost air spring is properly assembled, the vehicle controller responds to the judgment instruction to control the pressure relief valve and the distribution valve of the leftmost air spring to conduct, obtain the height value of the leftmost air spring, and calculate the height change of the leftmost air spring 15 seconds after the pressure relief valve and the distribution valve of the leftmost air spring are conducted: Assuming that the height change value is greater than 5 mm (the height of the leftmost air spring decreases by more than 5 mm), it can be determined that the pressure-maintaining valve of the leftmost air spring is properly assembled; Assuming that the height change value is not greater than 5 mm, the pressure relief valve and the distribution valve of the leftmost air spring are further checked to see if they are both normal. If the pressure relief valve and the distribution valve of the leftmost air spring are both normal, the interference of the abnormality of the pressure relief valve and / or the leftmost air spring on the judgment process is eliminated, and it can be finally determined that the pressure-maintaining valve of the leftmost air spring is not properly assembled.

[0061] The method for determining whether a pressure-maintaining valve is properly installed in an embodiment of the present invention first controls the pressure relief valve and the distribution valve of any air spring in response to a judgment instruction, then obtains the height value of the air spring and calculates the height change value of the air spring within a preset first time period. Finally, based on the height change value of the air spring within the preset first time period, it is determined whether the pressure-maintaining valve of the air spring is properly installed. In other words, the present invention uses the above-mentioned judgment method to automatically determine whether the pressure-maintaining valve of the air spring is properly installed, eliminating the need to manually check the air pipe mark to determine whether the pressure-maintaining valve is properly installed, thereby minimizing the risk of missed judgments and achieving a high judgment accuracy rate.

[0062] As an optional implementation, in one embodiment of the invention, see Figure 5 As shown, the step of detecting whether the pressure relief valve and the distribution valve of the air spring are both normal includes:

[0063] Step S3021, controlling the pressure relief valve to close and the distribution valve of the air spring to open.

[0064] Step S3022, controlling the air pump to start or controlling the air tank to start and the distribution valve of the air tank to turn on.

[0065] Step S3023: Acquire the height value of the air spring and calculate the height change value of the air spring within a preset second time period.

[0066] Step S3024: Determine whether the height change value of the air spring within a preset second time period is greater than a preset second height threshold.

[0067] Step S3025: If yes, determine that the distribution valve of the air spring is normal; if not, determine that the distribution valve of the air spring is abnormal.

[0068] Optionally, the preset second time duration is 5s, and the preset second height threshold is 8mm. Figure 4 As shown, taking the leftmost air spring as an example, when it is necessary to detect whether the pressure relief valve and the distribution valve of the air spring are normal, the vehicle controller controls the pressure relief valve to close and the distribution valve of the leftmost air spring to be turned on, and then controls the air pump to be turned on or the air tank to be turned on and the distribution valve of the air tank to be turned on, obtains the height value of the air spring, and calculates the height change value of the leftmost air spring 5s after the air pump is turned on or the air tank is controlled to be turned on and the distribution valve of the air tank is turned on. Assuming that the height change value is greater than 8mm (the height increase of the leftmost air spring is greater than 8mm), it can be determined that the distribution valve of the leftmost air spring is normal; otherwise, it can be determined that the distribution valve of the leftmost air spring is abnormal.

[0069] As an optional implementation, in one embodiment of the invention, see Figure 6 As shown, if so, after the step of determining whether the air spring distribution valve is normal, the method includes:

[0070] Step S3026, controlling the pressure relief valve to be open for a preset third time period and then controlling the pressure relief valve to be closed, and determining whether the pressure value in the pipeline is less than a preset pressure threshold;

[0071] Step S3027: If yes, determine that the pressure relief valve is normal; if not, determine that the pressure relief valve is abnormal.

[0072] Optionally, the preset third time duration may be 5s, and the preset pressure threshold may be 2 bar. Figure 4 As shown, the pressure relief valve is controlled to be turned on for 5 seconds and then closed. The pressure sensor P in the pipeline is used to determine whether the pressure value in the pipeline is less than 2 bar. If so, the pressure relief valve is normal; if not, the pressure relief valve is abnormal.

[0073] As an optional implementation, in one embodiment of the invention, see Figure 7 As shown, if so, after the step of determining that the pressure-maintaining valve of the air spring is not properly assembled, the method includes:

[0074] Step S304: Generate a fault alarm signal and send it to the instrument display for display.

[0075] When it is determined that the pressure-maintaining valve of the air spring is not assembled properly, a fault alarm signal is generated and sent to the instrument display for display, which can remind the inspection personnel that there is an assembly fault and prompt the inspection personnel to reassemble it.

[0076] As an optional implementation, in one embodiment of the invention, after the step of detecting whether the pressure relief valve and the distribution valve of the air spring are both normal, the method further includes:

[0077] If not, replace the pressure relief valve and / or the air spring distribution valve until it is detected that the pressure relief valve and the air spring distribution valve are normal.

[0078] Replace the pressure relief valve and / or the distribution valve of the air spring until both are normal, eliminate the interference of the abnormality of the pressure relief valve and / or the leftmost air spring on the judgment process, and then judge again whether the pressure maintaining valve of the air spring is properly assembled.

[0079] See also Figure 8 As shown, an embodiment of the present invention further provides a device for determining whether a pressure-maintaining valve is properly assembled, comprising a vehicle controller, wherein the vehicle controller comprises: a response unit, a calculation unit, and a judgment unit.

[0080] The response unit is used to control the conduction of the pressure relief valve and the distribution valve of any air spring in response to the judgment instruction.

[0081] The calculation unit is used to obtain the height value of the air spring and calculate the height change value of the air spring within a preset first time period.

[0082] Specifically, a height sensor is provided at any air spring, which can collect the height value of the corresponding air spring and output the collected height value to the vehicle controller, and then the vehicle controller can calculate the height change value of the air spring within a preset first time length.

[0083] The judging unit is used to judge whether the pressure-maintaining valve of the air spring is assembled in place according to a height change value of the air spring within a preset first time period.

[0084] Specifically, the judging unit is configured to judge whether the pressure-maintaining valve of the air spring is properly assembled according to a height change value of the air spring within a preset first time period, including:

[0085] Determine whether a height change value of the air spring within a preset first time period is greater than a preset first height threshold.

[0086] If so, determine whether the pressure maintaining valve of the air spring is assembled in place; if not, check whether the pressure relief valve and the distribution valve of the air spring are normal.

[0087] If so, it is determined that the pressure maintaining valve of the air spring is not properly assembled.

[0088] Optionally, the preset first time duration is not less than 15 seconds, and the preset first height threshold is not less than 5 mm. Figure 4As shown, taking the leftmost air spring as an example, the preset first time duration is 15 seconds, and the preset first height threshold is 5 mm. When it is necessary to determine whether the pressure-maintaining valve of the leftmost air spring is properly assembled, the vehicle controller responds to the judgment instruction to control the pressure relief valve and the distribution valve of the leftmost air spring to conduct, obtain the height value of the leftmost air spring, and calculate the height change of the leftmost air spring 15 seconds after the pressure relief valve and the distribution valve of the leftmost air spring are conducted: assuming that the height change value is greater than 5 mm, it can be determined that the pressure-maintaining valve of the leftmost air spring is properly assembled; assuming that the height change value is not greater than 5 mm, the pressure relief valve and the distribution valve of the leftmost air spring are further checked to see if they are both normal. If the pressure relief valve and the distribution valve of the leftmost air spring are both normal, the interference of the abnormality of the pressure relief valve and / or the leftmost air spring in the judgment process is eliminated, and it can be finally determined that the pressure-maintaining valve of the leftmost air spring is not properly assembled.

[0089] The device for determining whether a pressure-maintaining valve is properly assembled in an embodiment of the present invention includes a vehicle controller. The response unit of the vehicle controller first controls the conduction of the pressure relief valve and the distribution valve of any air spring in response to a judgment instruction. The calculation unit of the vehicle controller then obtains the height value of the air spring and calculates the height change value of the air spring within a preset first time period. The judgment unit of the vehicle controller finally determines whether the pressure-maintaining valve of the air spring is properly assembled based on the height change value of the air spring within the preset first time period. That is, the present invention can automatically determine whether the pressure-maintaining valve of the air spring is properly assembled based on the vehicle controller, eliminating the need to manually check the air pipe markings to determine whether the pressure-maintaining valve is properly assembled. This can minimize missed judgments and achieve a high judgment accuracy rate.

[0090] As an optional implementation manner, in one embodiment of the invention, the detecting whether the pressure relief valve and the distribution valve of the air spring are both normal includes:

[0091] The pressure relief valve is controlled to be closed and the distribution valve of the air spring is opened.

[0092] Control the air pump to start or control the air tank to start, and the distribution valve of the air tank to be turned on.

[0093] The height value of the air spring is obtained, and a height change value of the air spring within a preset second time period is calculated.

[0094] Determine whether the height change value of the air spring within a preset second time period is greater than a preset second height threshold.

[0095] If yes, it is determined that the distribution valve of the air spring is normal; if not, it is determined that the distribution valve of the air spring is abnormal.

[0096] Optionally, the preset second time duration is 5s, and the preset second height threshold is 8mm. Figure 4 As shown, taking the leftmost air spring as an example, when it is necessary to detect whether the pressure relief valve and the distribution valve of the air spring are normal, the vehicle controller controls the pressure relief valve to close and the distribution valve of the leftmost air spring to be turned on, and then controls the air pump to be turned on or the air tank to be turned on and the distribution valve of the air tank to be turned on, obtains the height value of the air spring, and calculates the height change value of the leftmost air spring 5s after the air pump is turned on or the air tank is controlled to be turned on and the distribution valve of the air tank is turned on. Assuming that the height change value is greater than 8mm (the height increase of the leftmost air spring is greater than 8mm), it can be determined that the distribution valve of the leftmost air spring is normal; otherwise, it can be determined that the distribution valve of the leftmost air spring is abnormal.

[0097] As an optional implementation, in one embodiment of the invention, if yes, after determining that the distribution valve of the air spring is normal, the method includes:

[0098] The pressure relief valve is controlled to be opened for a preset third time period and then controlled to be closed, and it is determined whether the pressure value in the pipeline is less than a preset pressure threshold value;

[0099] If yes, the pressure relief valve is normal; if no, the pressure relief valve is abnormal.

[0100] Optionally, the preset third time duration may be 5s, and the preset pressure threshold may be 2 bar. Figure 4 As shown, the pressure relief valve is controlled to be turned on for 5 seconds and then closed. The pressure sensor P in the pipeline is used to determine whether the pressure value in the pipeline is less than 2 bar. If so, the pressure relief valve is normal; if not, the pressure relief valve is abnormal.

[0101] As an optional implementation, in one embodiment of the invention, see Figure 7 As shown, if so, after determining that the pressure-maintaining valve of the air spring is not properly assembled, the method includes:

[0102] Generate a fault alarm signal and send it to the instrument display for display.

[0103] When it is determined that the pressure-maintaining valve of the air spring is not assembled properly, a fault alarm signal is generated and sent to the instrument display for display, which can remind the inspection personnel that there is an assembly fault and prompt the inspection personnel to reassemble it.

[0104] As an optional implementation, in one embodiment of the invention, if not, after detecting whether the pressure relief valve and the distribution valve of the air spring are both normal, the method further includes:

[0105] If not, replace the pressure relief valve and / or the air spring distribution valve until it is detected that the pressure relief valve and the air spring distribution valve are normal.

[0106] Replace the pressure relief valve and / or the distribution valve of the air spring until both are normal, eliminate the interference of the abnormality of the pressure relief valve and / or the leftmost air spring on the judgment process, and then judge again whether the pressure maintaining valve of the air spring is properly assembled.

[0107] An embodiment of the present invention further provides a vehicle, comprising a device for determining whether the aforementioned pressure-maintaining valve is properly assembled.

[0108] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0109] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0110] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be construed in the widest possible manner consistent with the principles and novel features of the present invention.

Claims

1. A method for determining whether a pressure-maintaining valve is properly assembled, characterized in that: The following steps are involved: In response to the judgment instruction, the pressure relief valve and the distribution valve of any air spring are controlled to be turned on; Obtaining a height value of the air spring and calculating a height change value of the air spring within a preset first time period; Determining whether a height change value of the air spring within a preset first time period is greater than a preset first height threshold; If yes, determine whether the pressure-maintaining valve of the air spring is properly installed; if not, check whether the pressure relief valve and the distribution valve of the air spring are normal; If so, it is determined that the pressure-maintaining valve of the air spring is not properly assembled; If not, the step of detecting whether the pressure relief valve and the distribution valve of the air spring are both normal includes: Control the pressure relief valve to close and the distribution valve of the air spring to conduct; Control the opening of the air pump or the opening of the gas tank and the conduction of the distribution valve of the gas tank; Obtaining a height value of the air spring and calculating a height change value of the air spring within a preset second time period; Determining whether a height change value of the air spring within a preset second time period is greater than a preset second height threshold; If yes, it is determined that the distribution valve of the air spring is normal; if no, it is determined that the distribution valve of the air spring is abnormal; If so, after the step of determining that the distribution valve of the air spring is normal, the method further comprises: The pressure relief valve is controlled to be opened for a preset third time period and then controlled to be closed, and it is determined whether the pressure value in the pipeline is less than a preset pressure threshold value; If yes, the pressure relief valve is normal; if no, the pressure relief valve is abnormal.

2. The method for determining whether the pressure-maintaining valve is properly assembled according to claim 1, characterized in that: The step of determining whether the height change value of the air spring within the preset second time period is greater than the preset second height threshold comprises: When the preset second time duration is 5s, the preset second height threshold is not less than 8mm.

3. The method for determining whether the pressure-maintaining valve is properly assembled according to claim 1, characterized in that: The step of determining whether the height change value of the air spring within a preset first time period is greater than a preset first height threshold comprises: When the preset first time duration is 15 seconds, the preset first height threshold is not less than 5 mm.

4. The method for determining whether a pressure-maintaining valve is properly assembled according to claim 1, wherein: If so, after the step of determining that the pressure-maintaining valve of the air spring is not properly assembled, the following steps are included: Generate a fault alarm signal and send it to the instrument display for display.

5. The method for determining whether a pressure-maintaining valve is properly assembled according to claim 1, wherein: If not, after the step of detecting whether the pressure relief valve and the distribution valve of the air spring are both normal, the method further includes: If not, replace the pressure relief valve and / or the air spring distribution valve until it is detected that the pressure relief valve and the air spring distribution valve are normal.

6. A device for determining whether a pressure-maintaining valve is properly assembled, characterized in that: A vehicle controller is included, the vehicle controller is used to execute the method for determining whether the pressure-maintaining valve is assembled in place according to claim 1, and the vehicle controller includes: A response unit, which is used to control the conduction of the pressure relief valve and the distribution valve of any air spring in response to the judgment instruction; a calculation unit, configured to obtain a height value of the air spring and calculate a height change value of the air spring within a preset first time period; A judging unit is used to judge whether the pressure-maintaining valve of the air spring is assembled in place according to a height change value of the air spring within a preset first time period.

7. A vehicle, characterized in that: The device comprises the device for judging whether the pressure-maintaining valve is assembled in place as described in claim 6.

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