Control valve sealing diagnosis method, device, equipment and readable storage medium

Abstract

A method, device, equipment and readable storage medium for diagnosing the sealing property of a control valve relate to the field of vehicle diagnostic technology, including obtaining the target working condition of the air spring system when it is necessary to perform a sealing property test on the target control valve, the target working condition including any one of the air tank air replenishing condition, the air spring inflation condition, the air spring deflation condition and the no-adjustment action condition, and the target control valve including any one of the target pressure relief valve, the target air spring distribution valve and the target air tank distribution valve; determining the target control object based on the target working condition, the target control object including at least one of the air spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve; performing opening and closing control on the target control object and determining the sealing property of the target control valve based on the control result, the control result including at least one of the air spring height reduction value, the air tank pressure value and the pipeline pressure increase value. Through this application, the sealing property test of the pressure relief valve can be effectively realized and the coverage of the diagnostic scenarios can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle diagnosis technology, and in particular to a control valve sealing diagnosis method, device, equipment and readable storage medium. Background Art

[0002] Control valves such as the distribution valve (which includes the air tank distribution valve and the air spring distribution valve) and the pressure relief valve play an important role in the integrated air spring system. The on / off control of the distribution valve connects the air spring (i.e., air spring) to the high-pressure gas of the air tank / air pump to raise the vehicle body. The combined opening and closing control of the distribution valve and the pressure relief valve exhausts the air spring to lower the vehicle body. Therefore, if the air spring distribution valve has a poor sealing performance (such as a loose closure due to abnormal opening), it may cause the vehicle body to rise or lower unexpectedly. If the pressure relief valve is not closed tightly, it may cause abnormal leakage of air from the air spring or air tank, resulting in an abnormally large drop in vehicle height, posing a safety hazard. Therefore, it is very necessary to diagnose the control valve.

[0003] In the related art, only the sealing detection of the empty spring distribution valve under the gas tank air replenishment condition and the gas tank distribution valve under the condition that all valves are not opened are realized, resulting in the problem of a single diagnostic scenario, and the sealing detection of the pressure relief valve is not realized; therefore, how to realize the sealing detection of the pressure relief valve and improve the coverage of the diagnostic scenario is a problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a control valve sealing diagnosis method, device, equipment and readable storage medium, which can effectively realize the sealing detection of the pressure relief valve and improve the coverage of the diagnosis scenario.

[0005] In a first aspect, an embodiment of the present application provides a method for diagnosing the sealing property of a control valve, comprising the following steps:

[0006] When a sealing test is required for the target control valve, the target working condition of the air spring system is obtained, wherein the target working condition includes any one of an air tank air replenishing working condition, an air spring charging working condition, an air spring deflation working condition, and a no-adjustment working condition. The target control valve includes any one of a target pressure relief valve, a target air spring distribution valve, and a target air tank distribution valve.

[0007] Determining a target control object based on the target working condition, the target control object comprising at least one of an air spring distribution valve, an air tank distribution valve, an air pump, and a pressure relief valve;

[0008] The target control object is controlled to be opened and closed, and the sealing performance of the target control valve is determined based on the control result, wherein the control result includes at least one of the lowering value of the empty spring height, the air tank pressure value, and the increasing value of the pipeline pressure.

[0009] In combination with the first aspect, in one embodiment, when the target control valve is a target pressure relief valve, determining the target control object based on the target operating condition includes:

[0010] When the target working condition is a non-adjustment action working condition, the empty spring distribution valve is used as the target control object for the sealing performance detection of the target pressure relief valve;

[0011] When the target working condition is the air tank air supply working condition, the air pump and the air tank distribution valve are used as the target control objects for the target pressure relief valve sealing detection;

[0012] When the target working condition is an empty spring inflation working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target pressure relief valve sealing detection.

[0013] In conjunction with the first aspect, in one embodiment, the performing on-off control on the target control object and determining the sealing performance of the target control valve based on the control result includes:

[0014] When the target control object is the air spring distribution valve and the height difference between two wheels located on the same axis is greater than the height difference threshold, the two air spring distribution valves located on the same axis are controlled to be in an open state to obtain two first air spring height reduction values;

[0015] When the target control objects are the air pump and the air tank distribution valve, the air pump and the air tank distribution valve are controlled to be in an open state to obtain the air tank pressure value;

[0016] When the target control object is the air pump and / or the air tank and the air spring distribution valve, the air pump and / or the air tank and the air spring distribution valve are controlled to be in an open state to obtain a second air spring height reduction value;

[0017] If any one of the following conditions is met: both first empty spring height reduction values ​​are greater than the preset first reduction value threshold, the air tank pressure value is less than the preset pressure threshold, and the second empty spring height reduction value is greater than the preset second reduction value threshold, then it is determined that the target pressure relief valve is in an unclosed state.

[0018] In conjunction with the first aspect, in one embodiment, when the target control valve includes a target air tank distribution valve and a target empty spring distribution valve, determining the target control object based on the target operating condition includes:

[0019] When the target working condition is a no-adjustment action condition, the empty spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve are used as target control objects for the sealing detection of the target air tank distribution valve and the target empty spring distribution valve.

[0020] In conjunction with the first aspect, in one embodiment, the performing on-off control on the target control object and determining the sealing performance of the target control valve based on the control result includes:

[0021] Control the air spring distribution valve, gas tank distribution valve and pressure relief valve to be in the closed state to obtain the pipeline pressure increase value;

[0022] If the pipeline pressure increase value is less than or equal to the preset pressure difference threshold, it is determined that the target gas tank distribution valve and the target air spring distribution valve are both in a closed state;

[0023] If the pipeline pressure increase value is greater than the preset pressure difference threshold, the air tank distribution valve and the air pump are controlled to be in an open state to obtain a first air spring height increase value;

[0024] When the first empty spring height increase value is greater than a preset first increase value threshold, it is determined that the target empty spring distribution valve is in an unsealed state;

[0025] When the first empty spring height increase value is not greater than a preset first increase value threshold, it is determined that the target empty spring distributing valve is in a closed state and the target air tank distributing valve is in an unclosed state.

[0026] In combination with the first aspect, in one embodiment, when the target control valve is a target empty spring distribution valve, determining the target control object based on the target working condition includes:

[0027] When the target working condition is the empty spring charging working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection;

[0028] When the target working condition is the empty spring deflation working condition, the pressure relief valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection.

[0029] In conjunction with the first aspect, in one embodiment, the performing on-off control on the target control object and determining the sealing performance of the target control valve based on the control result includes:

[0030] When the target control object is the air pump and / or the air tank distribution valve and the empty spring distribution valve, the air pump and / or the air tank and the empty spring distribution valve are controlled to be in an open state to obtain a second empty spring height increase value for the two empty springs located on the diagonal line;

[0031] When the target control objects are the pressure relief valve and the air spring distribution valve, the pressure relief valve and the air spring distribution valve are controlled to be in an open state to obtain a third air spring height reduction value of the two air springs located on the diagonal line;

[0032] If the two second empty spring height increase values ​​are both greater than the preset second increase value threshold or the two third empty spring height decrease values ​​are both greater than the preset third decrease value threshold, it is determined that the target empty spring distributing valve is in an unclosed state.

[0033] In a second aspect, an embodiment of the present application provides a control valve sealing diagnosis device, comprising:

[0034] a working condition acquisition module, which is used to acquire the current target working condition of the air spring system when a sealing test is required for the target control valve, wherein the target working condition includes any one of an air tank air replenishing condition, an air spring charging condition, an air spring deflation condition, and a no-adjustment action condition; and the target control valve includes any one of a target pressure relief valve, a target air spring distribution valve, and a target air tank distribution valve;

[0035] an object determination module, configured to determine a target control object based on the target operating condition, the target control object comprising at least one of an air spring distribution valve, an air tank distribution valve, an air pump, and a pressure relief valve;

[0036] A diagnostic control module is used to control the opening and closing of the target control object and determine the sealing performance of the target control valve based on the control result, wherein the control result includes at least one of the reduction value of the empty spring height, the air tank pressure value and the increase value of the pipeline pressure.

[0037] In conjunction with the second aspect, in one embodiment, when the target control valve is a target pressure relief valve, the object determination module is specifically configured to:

[0038] When the target working condition is a non-adjustment action working condition, the empty spring distribution valve is used as the target control object for the sealing performance detection of the target pressure relief valve;

[0039] When the target working condition is the air tank air supply working condition, the air pump and the air tank distribution valve are used as the target control objects for the target pressure relief valve sealing detection;

[0040] When the target working condition is an empty spring inflation working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target pressure relief valve sealing detection.

[0041] In conjunction with the second aspect, in one embodiment, the diagnosis control module is specifically configured to:

[0042] When the target control object is the air spring distribution valve and the height difference between two wheels located on the same axis is greater than the height difference threshold, the two air spring distribution valves located on the same axis are controlled to be in an open state to obtain two first air spring height reduction values;

[0043] When the target control objects are the air pump and the air tank distribution valve, the air pump and the air tank distribution valve are controlled to be in an open state to obtain the air tank pressure value;

[0044] When the target control object is the air pump and / or the air tank and the air spring distribution valve, the air pump and / or the air tank and the air spring distribution valve are controlled to be in an open state to obtain a second air spring height reduction value;

[0045] If any one of the following conditions is met: both first empty spring height reduction values ​​are greater than the preset first reduction value threshold, the air tank pressure value is less than the preset pressure threshold, and the second empty spring height reduction value is greater than the preset second reduction value threshold, then it is determined that the target pressure relief valve is in an unclosed state.

[0046] In conjunction with the second aspect, in one embodiment, when the target control valve includes a target gas tank distribution valve and a target empty spring distribution valve, the object determination module is further configured to:

[0047] When the target working condition is a no-adjustment action condition, the empty spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve are used as target control objects for the sealing detection of the target air tank distribution valve and the target empty spring distribution valve.

[0048] In conjunction with the second aspect, in one embodiment, the diagnosis control module is further configured to:

[0049] Control the air spring distribution valve, gas tank distribution valve and pressure relief valve to be in the closed state to obtain the pipeline pressure increase value;

[0050] If the pipeline pressure increase value is less than or equal to the preset pressure difference threshold, it is determined that the target gas tank distribution valve and the target air spring distribution valve are both in a closed state;

[0051] If the pipeline pressure increase value is greater than the preset pressure difference threshold, the air tank distribution valve and the air pump are controlled to be in an open state to obtain a first air spring height increase value;

[0052] When the first empty spring height increase value is greater than a preset first increase value threshold, it is determined that the target empty spring distribution valve is in an unsealed state;

[0053] When the first empty spring height increase value is not greater than a preset first increase value threshold, it is determined that the target empty spring distributing valve is in a closed state and the target air tank distributing valve is in an unclosed state.

[0054] In conjunction with the second aspect, in one embodiment, when the target control valve is a target empty spring distribution valve, the object determination module is further configured to:

[0055] When the target working condition is the empty spring charging working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection;

[0056] When the target working condition is the empty spring deflation working condition, the pressure relief valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection.

[0057] In conjunction with the second aspect, in one embodiment, the diagnosis control module is further configured to:

[0058] When the target control object is the air pump and / or the air tank distribution valve and the empty spring distribution valve, the air pump and / or the air tank and the empty spring distribution valve are controlled to be in an open state to obtain a second empty spring height increase value for the two empty springs located on the diagonal line;

[0059] When the target control objects are the pressure relief valve and the air spring distribution valve, the pressure relief valve and the air spring distribution valve are controlled to be in an open state to obtain a third air spring height reduction value of the two air springs located on the diagonal line;

[0060] If the two second empty spring height increase values ​​are both greater than the preset second increase value threshold or the two third empty spring height decrease values ​​are both greater than the preset third decrease value threshold, it is determined that the target empty spring distributing valve is in an unclosed state.

[0061] In a third aspect, an embodiment of the present application provides a control valve sealing diagnostic device, which includes a processor, a memory, and a control valve sealing diagnostic program stored in the memory and executable by the processor, wherein when the control valve sealing diagnostic program is executed by the processor, the steps of the control valve sealing diagnostic method as described above are implemented.

[0062] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a control valve sealing diagnostic program is stored, wherein when the control valve sealing diagnostic program is executed by a processor, the steps of the control valve sealing diagnostic method as described above are implemented.

[0063] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0064] By obtaining the target working condition that the air spring system is currently in, the target working condition includes any one of the air tank air replenishing working condition, the air spring inflation working condition, the air spring deflation working condition and the no adjustment action working condition, and based on different working conditions, determining the target control object corresponding to the target pressure relief valve, the target air spring distribution valve or the target air tank distribution valve, the target control object includes at least one of the air spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve; then the target control object is opened and closed, and based on at least one control result among the air spring height reduction value, the air tank pressure value and the pipeline pressure increase value, the target pressure relief valve, the target air spring distribution valve or the target air tank distribution valve is detected for sealing. Through this application, the sealing detection of the pressure relief valve, the air spring distribution valve and the air tank distribution valve under different working conditions can be effectively realized to improve the coverage of the diagnostic scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 This is a flow chart of an embodiment of a method for diagnosing the sealing performance of a control valve according to the present application;

[0066] Figure 2 This is a functional module diagram of an embodiment of a closedness diagnostic device for a control valve of the present application;

[0067] Figure 3 This is a schematic diagram of the hardware structure of the control valve sealing diagnostic equipment involved in the embodiment of the present application. DETAILED DESCRIPTION

[0068] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0070] In a first aspect, an embodiment of the present application provides a method for diagnosing the sealing performance of a control valve.

[0071] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of an embodiment of the control valve sealing diagnosis method of this application. Figure 1 As shown in the figure, the control valve sealing diagnosis method includes:

[0072] Step S10: When it is necessary to perform a sealing test on the target control valve, obtain the current target working condition of the air spring system, the target working condition includes any one of the air tank air replenishing condition, the air spring inflation condition, the air spring deflation condition and the no adjustment action condition, and the target control valve includes any one of the target pressure relief valve, the target air spring distribution valve and the target air tank distribution valve.

[0073] For example, it should be noted that the target control valve in this embodiment refers to a control valve that needs to be tested for sealing (i.e., the object to be tested). For example, if the pressure relief valve needs to be tested for sealing, the pressure relief valve is the target control valve. Similarly, the air spring distribution valve and the air tank distribution valve that need to be tested for sealing can also become target control valves; in addition, the target working condition in this embodiment refers to any one of the air tank air replenishment working condition, air spring inflation working condition, air spring deflation working condition and no adjustment action working condition (i.e., the working condition in which no operation such as air tank replenishment, air spring inflation and deflation is performed) in which the air spring system is currently located.

[0074] Among them, it should be understood that the air tank filling condition refers to controlling the air pump to be in working state to compress the high-pressure gas and transmit it to the air tank distribution valve to realize the inflation of the air tank; the air spring inflation condition refers to controlling the high-pressure gas in the air tank to be transmitted to the air spring distribution valve through the air tank distribution valve, so as to transmit the high-pressure gas to the air spring pressure maintaining valve through the air spring distribution valve, and then inflate the air spring, thereby realizing the lifting of the vehicle body; the air spring deflation condition refers to controlling the high-pressure gas in the air spring to be transmitted to the air spring distribution valve through the air spring pressure maintaining valve, so as to transmit the high-pressure gas to the pressure relief valve through the air spring distribution valve and discharge it into the atmosphere, thereby realizing the lowering of the vehicle body.

[0075] In this embodiment, the air spring system can be initialized first and it can be determined whether there is any fault in the air spring system. If there is a fault, the ASC (Air Suspension Controller) controller will issue a system fault alarm; if there is no fault, it will be determined that the target control valve needs to be tested for closure, and the current target working condition of the air spring system will be obtained at this time.

[0076] Step S20: determining a target control object based on the target working condition, wherein the target control object includes at least one of an air spring distribution valve, an air tank distribution valve, an air pump, and a pressure relief valve.

[0077] Exemplarily, in this embodiment, different target control objects are determined for different working conditions of the air spring system and different objects to be detected, and the target control object includes at least one of the air spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve, so as to construct corresponding detection conditions for different objects to be detected through the opening and closing control of the air spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve.

[0078] Step S30: performing opening and closing control on the target control object, and determining the sealing performance of the target control valve based on the control result, wherein the control result includes at least one of the empty spring height reduction value, the air tank pressure value, and the pipeline pressure increase value.

[0079] For example, in this embodiment, for different objects to be detected, different target control objects are individually or combined for opening and closing control, so that the height of the empty spring, the pressure of the gas tank, or the pipeline pressure changes and the empty spring height reduction value, the gas tank pressure value, or the pipeline pressure increase value are determined to obtain a control result, and then the sealing of the target pressure relief valve, the target empty spring distribution valve, or the target gas tank distribution valve can be detected based on the relationship between the empty spring height reduction value, the gas tank pressure value, or the pipeline pressure increase value and the corresponding threshold values. It can be seen that this embodiment can effectively realize the sealing detection of the pressure relief valve, the empty spring distribution valve, and the gas tank distribution valve under different working conditions to complete the rapid location of the fault, thereby speeding up the after-sales investigation speed, thereby saving after-sales work hours, and also improving the coverage of the diagnosis scene.

[0080] Furthermore, in one embodiment, when the target control valve is a target pressure relief valve, determining the target control object based on the target operating condition includes:

[0081] When the target working condition is a non-adjustment action working condition, the empty spring distribution valve is used as the target control object for the sealing performance detection of the target pressure relief valve;

[0082] When the target working condition is the air tank air supply working condition, the air pump and the air tank distribution valve are used as the target control objects for the target pressure relief valve sealing detection;

[0083] When the target working condition is an empty spring inflation working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target pressure relief valve sealing detection.

[0084] For example, in this embodiment, when the target control valve is a target pressure relief valve, corresponding target control objects are determined for different target operating conditions of the air spring system. Specifically, if the target operating condition is a non-adjustment operating condition, the air spring distribution valve is used as the target control object to detect the sealing of the target pressure relief valve; if the target operating condition is an air tank air replenishment operating condition, the air pump and the air tank distribution valve are used as the target control objects to detect the sealing of the target pressure relief valve; and if the target operating condition is an air spring inflation operating condition, the air pump and the air spring distribution valve, the air tank distribution valve and the air spring distribution valve, or a combination of the air pump, the air spring distribution valve, and the air tank distribution valve are used as the target control objects to detect the sealing of the target pressure relief valve.

[0085] It should be noted that, for the scenario where the target working condition is the empty spring inflation working condition, the specific target control object can be determined according to the real-time pressure in the air tank; for example, assuming that it includes a first pressure value and a second pressure value and the first pressure value is greater than the second pressure value, when the real-time pressure in the air tank is greater than the first pressure value, it means that the current pressure in the air tank is relatively high, and the air spring can be quickly lifted by combining the air tank distribution valve and the empty spring distribution valve, that is, the air tank distribution valve and the empty spring distribution valve are used as target control objects to effectively increase the speed of the air spring lifting, thereby improving the efficiency of the pressure relief valve sealing detection.

[0086] When the real-time pressure in the air tank is less than the first pressure value, it means that the current pressure in the air tank is low and insufficient to support the lifting of the air spring. Therefore, the air pump and the air spring distribution valve are used as target control objects to ensure that the air spring can be lifted normally; and when the real-time pressure in the air tank is between the first pressure value and the second pressure value, the combination of the air pump, the air spring distribution valve and the air tank distribution valve is used as the target control object to ensure that the air spring can be lifted normally while increasing the lifting speed of the air spring to a certain extent.

[0087] Furthermore, in one embodiment, the performing of on-off control on the target control object and determining the sealing performance of the target control valve based on the control result includes:

[0088] When the target control object is the air spring distribution valve and the height difference between two wheels located on the same axis is greater than the height difference threshold, the two air spring distribution valves located on the same axis are controlled to be in an open state to obtain two first air spring height reduction values;

[0089] When the target control objects are the air pump and the air tank distribution valve, the air pump and the air tank distribution valve are controlled to be in an open state to obtain the air tank pressure value;

[0090] When the target control object is the air pump and / or the air tank and the air spring distribution valve, the air pump and / or the air tank and the air spring distribution valve are controlled to be in an open state to obtain a second air spring height reduction value;

[0091] If any one of the following conditions is met: both first empty spring height reduction values ​​are greater than the preset first reduction value threshold, the air tank pressure value is less than the preset pressure threshold, and the second empty spring height reduction value is greater than the preset second reduction value threshold, then it is determined that the target pressure relief valve is in an unclosed state.

[0092] For example, it should be noted that the height difference threshold refers to the threshold used to determine whether the height difference of the empty spring is normal; the first reduction value threshold and the second reduction value threshold both refer to the thresholds used to determine whether the reduction in the height of the empty spring is normal, and the two may be equal or unequal; the pressure threshold refers to the threshold used to determine whether the pressure in the air tank is normal; among them, the specific value settings of the height difference threshold, the first reduction value threshold, the second reduction value threshold and the pressure threshold can be determined by considering the impact of special road conditions and other working conditions on the test results or determined through test calibration, and are not limited here. For example, the height difference threshold is set to 25mm, the first reduction value threshold is set to 8mm, the second reduction value threshold is set to 10mm and the pressure threshold is set to 3bar.

[0093] In this embodiment, when the air spring system is in a non-adjustment working condition, if it is detected that the height difference of at least one pair of coaxial left and right wheels is relatively high (that is, the height difference of the coaxial left and right wheels is greater than 25mm), the ASC system will simultaneously open the corresponding left and right air spring distribution valves to allow the left and right air spring distribution valves to communicate with each other's gases, thereby obtaining the first air spring height reduction value corresponding to the left and right air springs; at this time, if the pressure relief valve is tightly closed, then under normal circumstances, there should be a scenario in which the height of one air spring increases and the height of the other air spring decreases. Based on this, the closing of the target pressure relief valve can be detected by detecting whether the heights of the left and right air springs are both reduced and whether the reduction amount of both is greater than the corresponding first reduction value threshold of 8mm.

[0094] Specifically, if the first empty spring height reduction values ​​corresponding to the left and right empty springs are both greater than 8mm, the target pressure relief valve is determined to be in an unsealed state, and the ASC system will alarm that the target pressure relief valve is not tightly closed; if not, the target pressure relief valve is determined to be in a closed state, and the ASC system will not alarm that the target pressure relief valve is not tightly closed. It should be noted that since the opening size of the pressure relief valve will affect the gas leakage rate, and thus affect the speed of change of the empty spring height, in order to avoid the influence of the pressure relief valve opening on the test results, the closing of the target pressure relief valve can be detected by limiting the time period (for example, within 5 seconds) to whether the empty spring height reduction values ​​of the left and right empty springs are both greater than 8mm, so as to further improve the precision and accuracy of the pressure relief valve closing test.

[0095] When the air spring system is in a separate air tank replenishment condition, the ASC system will open the air pump and the air tank distribution valve at the same time to replenish the air tank through the air pump. At this time, if the pressure relief valve is tightly closed, then under normal circumstances, the pressure in the air tank should increase; based on this, the real-time pressure value in the air tank can be detected by the pressure sensor to obtain the air tank pressure P, and the closing of the target pressure relief valve can be detected by detecting whether the air tank pressure P is less than the corresponding pressure threshold of 3 bar.

[0096] Specifically, if the gas tank pressure P is less than 3 bar, the target pressure relief valve is determined to be in an unsealed state, and the ASC system will issue an alarm indicating that the target pressure relief valve is not tightly closed. If the gas tank pressure P is not less than 3 bar, the target pressure relief valve is determined to be in a closed state, and the ASC system will not issue an alarm indicating that the target pressure relief valve is not tightly closed. It should be noted that the opening of the pressure relief valve affects the rate of gas leakage, and thus the rate of change of the gas tank pressure. To avoid the influence of the pressure relief valve opening on the test results, the test for the sealing of the target pressure relief valve can be limited to whether the gas tank pressure P is less than 3 bar within a preset gas tank refill period (e.g., within 10 seconds), thereby further improving the precision and accuracy of the pressure relief valve sealing test.

[0097] In addition, when the air spring system is in the air spring inflation state, the ASC system will choose to open (1) the air pump and the air spring distribution valve or (2) the air tank distribution valve and the air spring distribution valve or (3) the air pump, the air spring distribution valve and the air tank distribution valve at the same time according to the pressure in the air tank to control the lifting of the air spring. At this time, if the pressure relief valve is tightly closed, then under normal circumstances, the height of the air spring should be increased; based on this, the closing of the target pressure relief valve can be detected by whether the reduction in the air spring height (i.e., the second air spring height reduction value) is greater than the corresponding second reduction value threshold of 10mm.

[0098] Specifically, if the second empty spring height reduction value is greater than 10mm, the target pressure relief valve is determined to be in an unsealed state, and the ASC system will issue an alarm indicating that the target pressure relief valve is not tightly closed. If the second empty spring height reduction value is not greater than 10mm, the target pressure relief valve is determined to be in a closed state, and the ASC system will not issue an alarm indicating that the target pressure relief valve is not tightly closed. It should be noted that since the opening of the pressure relief valve affects the gas leakage rate, and thus the speed of change of the empty spring height, in order to avoid the influence of the pressure relief valve opening on the test results, the closure of the target pressure relief valve can be tested by limiting the time period of the empty spring inflation to whether the empty spring height reduction value is greater than 10mm (e.g., within 5 seconds), thereby further improving the precision and accuracy of the pressure relief valve closure test.

[0099] Furthermore, in one embodiment, when the target control valve includes a target air tank distribution valve and a target empty spring distribution valve, determining the target control object based on the target working condition includes:

[0100] When the target working condition is a no-adjustment action condition, the empty spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve are used as target control objects for the sealing detection of the target air tank distribution valve and the target empty spring distribution valve.

[0101] For example, in this embodiment, when the target control valve is the target air tank distribution valve and the target air spring distribution valve, if the current air spring system is in a working condition where no operations such as air tank air replenishment, air spring inflation and deflation are performed, the air spring distribution valve, air tank distribution valve, air pump and pressure relief valve are used as target control objects to realize the sealing detection of the target air tank distribution valve and the target air spring distribution valve.

[0102] Furthermore, in one embodiment, the performing of on-off control on the target control object and determining the sealing performance of the target control valve based on the control result includes:

[0103] Control the air spring distribution valve, gas tank distribution valve and pressure relief valve to be in the closed state to obtain the pipeline pressure increase value;

[0104] If the pipeline pressure increase value is less than or equal to the preset pressure difference threshold, it is determined that the target gas tank distribution valve and the target air spring distribution valve are both in a closed state;

[0105] If the pipeline pressure increase value is greater than the preset pressure difference threshold, the air tank distribution valve and the air pump are controlled to be in an open state to obtain a first air spring height increase value;

[0106] When the first empty spring height increase value is greater than a preset first increase value threshold, it is determined that the target empty spring distribution valve is in an unsealed state;

[0107] When the first empty spring height increase value is not greater than a preset first increase value threshold, it is determined that the target empty spring distributing valve is in a closed state and the target air tank distributing valve is in an unclosed state.

[0108] For example, it should be noted that the pressure difference threshold refers to the threshold used to determine whether the change in pipeline pressure is normal, and the first rise value threshold refers to the threshold used to determine whether the increase in the height of the empty spring is normal; among them, the specific value settings of the pressure difference threshold and the first rise value threshold can be determined according to actual needs or through experimental calibration, and are not limited here. For example, the pressure difference threshold is set to 4 bar and the first rise value threshold is set to 8 mm.

[0109] In this embodiment, if the air spring system is in a working condition without any adjustment action, the ASC system will close all distribution valves and pressure relief valves including the air spring distribution valve and the air tank distribution valve. At this time, if the air spring distribution valve and the air tank distribution valve are tightly closed, then under normal circumstances, the pressure in the pipeline will not increase; based on this, the real-time pressure value in the pipeline can be detected by a pressure sensor to obtain the pipeline pressure increase value △P. The sealing of the target air spring distribution valve and the target air tank distribution valve can be detected by first checking whether the pipeline pressure increase value △P is greater than the corresponding pressure difference threshold of 4bar.

[0110] Among them, if the pipeline pressure increase value △P is not greater than 4bar, it is determined that the target air spring distribution valve and the target air tank distribution valve are both in a closed state, and the ASC system will not issue an alarm for the target pressure relief valve to be not tightly closed; if the pipeline pressure increase value △P is greater than 4bar, it means that the target air spring distribution valve or the target air tank distribution valve is not tightly closed. At this time, it is necessary to further detect whether the target air spring distribution valve is in an unclosed state or the target air tank distribution valve is in an unclosed state through the opening and closing control of the air pump and the air tank distribution valve, that is, the ASC system will control to open the air pump and the air tank distribution valve, but not to open the air spring distribution valve. At this time, if the air spring distribution valve is tightly closed, then under normal circumstances the air spring height will not increase; based on this, the closing of the target pressure relief valve can continue to be detected by whether the increase in the air spring height (that is, the first air spring height increase value) is greater than the corresponding first increase value threshold of 8mm.

[0111] Specifically, if the first empty spring height increase is greater than 8mm, the target empty spring distribution valve is determined to be in an unsealed state, and the ASC system will alarm that the target empty spring distribution valve has a lax closure problem; and if the second empty spring height decrease is not greater than 8mm, the target gas tank distribution valve is determined to be in an unsealed state, and the ASC system will alarm that the target gas tank distribution valve has a lax closure problem. It should be noted that since the opening size of the empty spring distribution valve and the gas tank distribution valve will affect the gas leakage rate, and thus affect the rate of change of the pipeline pressure and the empty spring height, in order to avoid the influence of the opening size of the empty spring distribution valve and the gas tank distribution valve on the test results, the sealing of the target empty spring distribution valve and the target gas tank distribution valve can be tested by limiting the detection to whether the pipeline pressure increase value △P is greater than 4 bar within a preset static time period (for example, within 20 seconds) and whether the second empty spring height decreases by more than 8mm within a preset gas tank filling time period (for example, within 5 seconds), so as to further improve the precision and accuracy of the sealing detection of the empty spring distribution valve and the gas tank distribution valve.

[0112] Furthermore, in one embodiment, when the target control valve is a target empty spring distribution valve, determining the target control object based on the target working condition includes:

[0113] When the target working condition is the empty spring charging working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection;

[0114] When the target working condition is the empty spring deflation working condition, the pressure relief valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection.

[0115] Exemplarily, in this embodiment, when the target control valve is the target air spring distribution valve, if the current air spring system is in the air spring inflation condition, the air pump and the air spring distribution valve, the air tank distribution valve and the air spring distribution valve, or the combination of the air pump, the air spring distribution valve and the air tank distribution valve are used as target control objects to realize the sealing detection of the target air spring distribution valve; and if the current air spring system is in the air spring deflation condition, the pressure relief valve and the air spring distribution valve are used as target control objects to realize the sealing detection of the target air spring distribution valve.

[0116] Furthermore, in one embodiment, the performing of on-off control on the target control object and determining the sealing performance of the target control valve based on the control result includes:

[0117] When the target control object is the air pump and / or the air tank distribution valve and the empty spring distribution valve, the air pump and / or the air tank and the empty spring distribution valve are controlled to be in an open state to obtain a second empty spring height increase value for the two empty springs located on the diagonal line;

[0118] When the target control objects are the pressure relief valve and the air spring distribution valve, the pressure relief valve and the air spring distribution valve are controlled to be in an open state to obtain a third air spring height reduction value of the two air springs located on the diagonal line;

[0119] If the two second empty spring height increase values ​​are both greater than the preset second increase value threshold or the two third empty spring height decrease values ​​are both greater than the preset third decrease value threshold, it is determined that the target empty spring distributing valve is in an unclosed state.

[0120] For example, it should be noted that the second rising value threshold refers to the threshold used to judge whether the change in the height of the diagonal empty spring is normal, and the third falling value threshold refers to the threshold used to judge whether the change in the height of the diagonal empty spring is normal; wherein, the specific value settings of the first rising value threshold and the third falling value threshold can be determined according to actual needs or through experimental calibration, and are not limited here. For example, the first rising value threshold and the third falling value threshold are both set to 8mm.

[0121] When testing the sealing performance of the target air spring distribution valve, if the air spring system is in the air spring inflation condition, the ASC system will choose to open (1) the air pump and the air spring distribution valve or (2) the air tank distribution valve and the air spring distribution valve or (3) the air pump, the air spring distribution valve and the air tank distribution valve at the same time according to the pressure in the air tank to control the lifting of the air spring. At this time, if the air spring distribution valve is tightly closed, then under normal circumstances, the height of a pair of air springs located on the diagonal line should be one increased and the other decreased; based on this, the sealing performance of the target air spring distribution valve can be tested by whether the increase in the height of the two air springs on the diagonal line (i.e., the second air spring height increase value) is greater than the corresponding second increase value threshold of 8mm.

[0122] Specifically, if the two second air spring height reduction values ​​are both greater than 8mm, the target air spring distribution valve will be judged to be in an unclosed state, and the ASC system will alarm that the target air spring distribution valve is not tightly closed. Otherwise, the target air spring distribution valve will be judged to be in a closed state, and the ASC system will not alarm that the target air spring distribution valve is not tightly closed. It should be noted that since the opening size of the air spring distribution valve will affect the gas leakage rate, and thus affect the speed of change of the air spring height, in order to avoid the influence of the opening size of the air spring distribution valve on the test results, the closing of the target air spring distribution valve can be detected by limiting whether the height increase of the air spring is greater than 8mm within a preset air spring inflation time period (for example, within 5 seconds), so as to further improve the precision and accuracy of the air spring distribution valve closing test.

[0123] When testing the closure of the target air spring distribution valve, if the air spring system is in the air spring deflation condition, the ASC system will open the pressure relief valve and the air spring distribution valve at the same time to control the descent of the air spring. At this time, if the air spring distribution valve is tightly closed, then under normal circumstances, the height of a pair of air springs located on the diagonal should be one lowered and the other raised; based on this, the closure of the target air spring distribution valve can be detected by measuring whether the reduction in the height of the two air springs on the diagonal (i.e., the third air spring height reduction value) is greater than the corresponding third reduction value threshold of 8mm.

[0124] Specifically, if the two third air spring height reduction values ​​are both greater than 8mm, the target air spring distribution valve will be judged to be in an unclosed state, and the ASC system will alarm that the target air spring distribution valve is not tightly closed. Otherwise, the target air spring distribution valve will be judged to be in a closed state, and the ASC system will not alarm that the target air spring distribution valve is not tightly closed. It should be noted that since the opening size of the air spring distribution valve will affect the gas leakage rate, and thus affect the speed of change of the air spring height, in order to avoid the influence of the opening size of the air spring distribution valve on the test results, the closing of the target air spring distribution valve can be detected by limiting whether the air spring height reduction value is greater than 8mm within a preset air spring deflation time period (for example, within 5s), so as to further improve the precision and accuracy of the air spring distribution valve closing test.

[0125] In summary, this embodiment can not only improve the coverage of diagnostic scenarios, but also improve the diagnostic precision and accuracy; in addition, the control logic of the control valve sealing diagnosis involved in this embodiment can be encapsulated in the ASC controller, so that the ASC can intelligently detect whether the control valve has a loose closing fault, so as to avoid manual inspection that consumes a lot of man-hours of disassembly, 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 fault, thereby saving a lot of after-sales man-hours.

[0126] In a second aspect, an embodiment of the present application further provides a control valve sealing diagnosis device.

[0127] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the closedness diagnostic device for a control valve of this application. Figure 2 As shown, the control valve sealing diagnostic device includes:

[0128] a working condition acquisition module, which is used to acquire the current target working condition of the air spring system when a sealing test is required for the target control valve, wherein the target working condition includes any one of an air tank air replenishing condition, an air spring charging condition, an air spring deflation condition, and a no-adjustment action condition; and the target control valve includes any one of a target pressure relief valve, a target air spring distribution valve, and a target air tank distribution valve;

[0129] an object determination module, configured to determine a target control object based on the target operating condition, the target control object comprising at least one of an air spring distribution valve, an air tank distribution valve, an air pump, and a pressure relief valve;

[0130] A diagnostic control module is used to control the opening and closing of the target control object and determine the sealing performance of the target control valve based on the control result, wherein the control result includes at least one of the reduction value of the empty spring height, the air tank pressure value and the increase value of the pipeline pressure.

[0131] Furthermore, in one embodiment, when the target control valve is a target pressure relief valve, the object determination module is specifically configured to:

[0132] When the target working condition is a non-adjustment action working condition, the empty spring distribution valve is used as the target control object for the sealing performance detection of the target pressure relief valve;

[0133] When the target working condition is the air tank air supply working condition, the air pump and the air tank distribution valve are used as the target control objects for the target pressure relief valve sealing detection;

[0134] When the target working condition is an empty spring inflation working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target pressure relief valve sealing detection.

[0135] Furthermore, in one embodiment, the diagnostic control module is specifically configured to:

[0136] When the target control object is the air spring distribution valve and the height difference between two wheels located on the same axis is greater than the height difference threshold, the two air spring distribution valves located on the same axis are controlled to be in an open state to obtain two first air spring height reduction values;

[0137] When the target control objects are the air pump and the air tank distribution valve, the air pump and the air tank distribution valve are controlled to be in an open state to obtain the air tank pressure value;

[0138] When the target control object is the air pump and / or the air tank and the air spring distribution valve, the air pump and / or the air tank and the air spring distribution valve are controlled to be in an open state to obtain a second air spring height reduction value;

[0139] If any one of the following conditions is met: both first empty spring height reduction values ​​are greater than the preset first reduction value threshold, the air tank pressure value is less than the preset pressure threshold, and the second empty spring height reduction value is greater than the preset second reduction value threshold, then it is determined that the target pressure relief valve is in an unclosed state.

[0140] Furthermore, in one embodiment, when the target control valve includes a target air tank distribution valve and a target empty spring distribution valve, the object determination module is further configured to:

[0141] When the target working condition is a no-adjustment action condition, the empty spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve are used as target control objects for the sealing detection of the target air tank distribution valve and the target empty spring distribution valve.

[0142] Furthermore, in one embodiment, the diagnostic control module is further configured to:

[0143] Control the air spring distribution valve, gas tank distribution valve and pressure relief valve to be in the closed state to obtain the pipeline pressure increase value;

[0144] If the pipeline pressure increase value is less than or equal to the preset pressure difference threshold, it is determined that the target gas tank distribution valve and the target air spring distribution valve are both in a closed state;

[0145] If the pipeline pressure increase value is greater than the preset pressure difference threshold, the air tank distribution valve and the air pump are controlled to be in an open state to obtain a first air spring height increase value;

[0146] When the first empty spring height increase value is greater than a preset first increase value threshold, it is determined that the target empty spring distribution valve is in an unsealed state;

[0147] When the first empty spring height increase value is not greater than a preset first increase value threshold, it is determined that the target empty spring distributing valve is in a closed state and the target air tank distributing valve is in an unclosed state.

[0148] Furthermore, in one embodiment, when the target control valve is a target empty spring distribution valve, the object determination module is further configured to:

[0149] When the target working condition is the empty spring charging working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection;

[0150] When the target working condition is the empty spring deflation working condition, the pressure relief valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection.

[0151] Furthermore, in one embodiment, the diagnostic control module is further configured to:

[0152] When the target control object is the air pump and / or the air tank distribution valve and the empty spring distribution valve, the air pump and / or the air tank and the empty spring distribution valve are controlled to be in an open state to obtain a second empty spring height increase value for the two empty springs located on the diagonal line;

[0153] When the target control objects are the pressure relief valve and the air spring distribution valve, the pressure relief valve and the air spring distribution valve are controlled to be in an open state to obtain a third air spring height reduction value of the two air springs located on the diagonal line;

[0154] If the two second empty spring height increase values ​​are both greater than the preset second increase value threshold or the two third empty spring height decrease values ​​are both greater than the preset third decrease value threshold, it is determined that the target empty spring distributing valve is in an unclosed state.

[0155] Among them, the functional implementation of each module in the above-mentioned control valve sealing diagnosis device corresponds to each step in the above-mentioned control valve sealing diagnosis method embodiment, and its functions and implementation processes are no longer repeated here.

[0156] In a third aspect, an embodiment of the present application provides a control valve sealing diagnostic device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0157] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the control valve sealing diagnosis device involved in the embodiment of the present application. In the embodiment of the present application, the control valve sealing diagnosis device may include a processor, a memory, a communication interface and a communication bus.

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

[0159] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, used to interconnect components within the control valve closed diagnostics device, as well as interfaces used to interconnect the control valve closed diagnostics device with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

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

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

[0162] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

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

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

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

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

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

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

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

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

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

[0172] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, 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 the sealing performance of a control valve, characterized in that: The following steps are involved: When a sealing test is required for the target control valve, the target working condition of the air spring system is obtained, wherein the target working condition includes any one of an air tank air replenishing working condition, an air spring charging working condition, an air spring deflation working condition, and a no-adjustment working condition. The target control valve includes any one of a target pressure relief valve, a target air spring distribution valve, and a target air tank distribution valve. Determining a target control object based on the target working condition, the target control object comprising at least one of an air spring distribution valve, an air tank distribution valve, an air pump, and a pressure relief valve; performing on / off control on the target control object and determining the sealing performance of the target control valve based on a control result, wherein the control result includes at least one of a reduced value of an empty spring height, a pressure value of an air storage tank, and an increased value of a pipeline pressure; Wherein, when the target control valve is a target pressure relief valve, determining the target control object based on the target working condition includes: When the target working condition is a non-adjustment action working condition, the empty spring distribution valve is used as the target control object for the sealing performance detection of the target pressure relief valve; When the target working condition is the air tank air supply working condition, the air pump and the air tank distribution valve are used as the target control objects for the target pressure relief valve sealing detection; When the target working condition is an empty spring inflation working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target pressure relief valve sealing detection.

2. The control valve sealing diagnosis method according to claim 1, characterized in that: The performing of opening and closing control on the target control object and determining the sealing performance of the target control valve based on the control result includes: When the target control object is the air spring distribution valve and the height difference between two wheels located on the same axis is greater than the height difference threshold, the two air spring distribution valves located on the same axis are controlled to be in an open state to obtain two first air spring height reduction values; When the target control objects are the air pump and the air tank distribution valve, the air pump and the air tank distribution valve are controlled to be in an open state to obtain the air tank pressure value; When the target control object is the air pump and / or the air tank and the air spring distribution valve, the air pump and / or the air tank and the air spring distribution valve are controlled to be in an open state to obtain a second air spring height reduction value; If any one of the following conditions is met: both first empty spring height reduction values ​​are greater than the preset first reduction value threshold, the air tank pressure value is less than the preset pressure threshold, and the second empty spring height reduction value is greater than the preset second reduction value threshold, then it is determined that the target pressure relief valve is in an unclosed state.

3. The control valve sealing diagnosis method according to claim 1, characterized in that: When the target control valve includes a target air tank distribution valve and a target empty spring distribution valve, determining the target control object based on the target working condition includes: When the target working condition is a no-adjustment action condition, the empty spring distribution valve, the air tank distribution valve, the air pump and the pressure relief valve are used as target control objects for the sealing detection of the target air tank distribution valve and the target empty spring distribution valve.

4. The control valve sealing diagnosis method according to claim 3, characterized in that: The performing of opening and closing control on the target control object and determining the sealing performance of the target control valve based on the control result includes: Control the air spring distribution valve, gas tank distribution valve and pressure relief valve to be in the closed state to obtain the pipeline pressure increase value; If the pipeline pressure increase value is less than or equal to the preset pressure difference threshold, it is determined that the target gas tank distribution valve and the target air spring distribution valve are both in a closed state; If the pipeline pressure increase value is greater than the preset pressure difference threshold, the air tank distribution valve and the air pump are controlled to be in an open state to obtain a first air spring height increase value; When the first empty spring height increase value is greater than a preset first increase value threshold, it is determined that the target empty spring distribution valve is in an unsealed state; When the first empty spring height increase value is not greater than a preset first increase value threshold, it is determined that the target empty spring distributing valve is in a closed state and the target air tank distributing valve is in an unclosed state.

5. The control valve sealing diagnosis method according to claim 1, characterized in that: When the target control valve is a target empty spring distribution valve, determining the target control object based on the target working condition includes: When the target working condition is the empty spring charging working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection; When the target working condition is the empty spring deflation working condition, the pressure relief valve and the empty spring distribution valve are used as target control objects for the target empty spring distribution valve sealing detection.

6. The control valve sealing diagnosis method according to claim 5, characterized in that: The performing of opening and closing control on the target control object and determining the sealing performance of the target control valve based on the control result includes: When the target control object is the air pump and / or the air tank distribution valve and the empty spring distribution valve, the air pump and / or the air tank and the empty spring distribution valve are controlled to be in an open state to obtain a second empty spring height increase value for the two empty springs located on the diagonal line; When the target control objects are the pressure relief valve and the air spring distribution valve, the pressure relief valve and the air spring distribution valve are controlled to be in an open state to obtain a third air spring height reduction value of the two air springs located on the diagonal line; If the two second empty spring height increase values ​​are both greater than the preset second increase value threshold or the two third empty spring height decrease values ​​are both greater than the preset third decrease value threshold, it is determined that the target empty spring distributing valve is in an unclosed state.

7. A control valve sealing diagnostic device, characterized in that: include: a working condition acquisition module, which is used to acquire the current target working condition of the air spring system when a sealing test is required for the target control valve, wherein the target working condition includes any one of an air tank air replenishing condition, an air spring charging condition, an air spring deflation condition, and a no-adjustment action condition; and the target control valve includes any one of a target pressure relief valve, a target air spring distribution valve, and a target air tank distribution valve; an object determination module, configured to determine a target control object based on the target operating condition, the target control object comprising at least one of an air spring distribution valve, an air tank distribution valve, an air pump, and a pressure relief valve; a diagnostic control module configured to perform on-off control of the target control object and determine the sealing performance of the target control valve based on a control result, wherein the control result includes at least one of a reduced value of an empty spring height, a pressure value of an air storage tank, and an increased value of a pipeline pressure; Wherein, when the target control valve is a target pressure relief valve, determining the target control object based on the target working condition includes: When the target working condition is a non-adjustment action working condition, the empty spring distribution valve is used as the target control object for the sealing performance detection of the target pressure relief valve; When the target working condition is the air tank air supply working condition, the air pump and the air tank distribution valve are used as the target control objects for the target pressure relief valve sealing detection; When the target working condition is an empty spring inflation working condition, the air pump and / or the air tank distribution valve and the empty spring distribution valve are used as target control objects for the target pressure relief valve sealing detection.

8. A control valve sealing diagnostic device, characterized in that: The control valve sealing diagnostic device includes a processor, a memory, and a control valve sealing diagnostic program stored in the memory and executable by the processor, wherein when the control valve sealing diagnostic program is executed by the processor, the steps of the control valve sealing diagnostic method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a control valve sealing diagnostic program, wherein when the control valve sealing diagnostic program is executed by a processor, the steps of the control valve sealing diagnostic method according to any one of claims 1 to 6 are implemented.

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