Closeness diagnostic method, device and equipment for control valve and readable storage medium

Abstract

The invention discloses a method, a device and equipment for diagnosing the sealing performance of a control valve and a readable storage medium, and relates to the technical field of vehicle diagnos.The method comprises the steps that when the sealing performance of a target control valve needs to be detected, the current target working condition of an air spring system is obtained; the target working condition comprises any one of an air storage tank air supply working condition, an air spring inflation working condition, an air spring deflation working condition and a non-adjustment action working condition, and the target control valve comprises any one of a target pressure release valve, a target air spring distribution valve and a target air storage tank distribution valve; determining a target control object based on the target working condition, wherein the target control object comprises at least one of an air spring distribution valve, an air storage tank distribution valve, an air pump and a pressure release valve; and opening and closing control is conducted on the standard control object, and the sealing performance of the target control valve is determined based on a control result, wherein the control result comprises at least one of an air spring height reduction value, an air storage tank pressure value and a pipeline pressure increase value. According to the invention, the closure detection of the pressure release valve can be effectively realized, and the coverage rate of a diagnosis scene is 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 (including the gas tank distribution valve and the air spring distribution valve, etc.) and the pressure relief valve play an important role in the integrated air spring system; among them, the switch control of the distribution valve can realize the connection between the air spring (i.e., air spring) and the high-pressure gas of the gas tank / air pump to raise the vehicle body; and the combined opening control of the distribution valve and the pressure relief valve can realize the exhaust of the air spring to lower the vehicle body. It can be seen that once the air spring distribution valve has a poor sealing problem (such as lax closure due to abnormal opening), it may cause the vehicle body to rise or fall unexpectedly; and if the pressure relief valve is not closed tightly, it may cause abnormal leakage of the air spring or gas tank gas, so that the vehicle body height is abnormally reduced, which poses a safety hazard, so it is very necessary to diagnose the control valve.

[0003] In the related technology, only the closure detection of the empty spring distribution valve under the condition of air tank replenishment and the air tank distribution valve under the condition that all valves are not opened are realized, resulting in the problem of single diagnostic scenario, and the closure detection of the pressure relief valve is not realized; therefore, how to realize the closure 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 control valve sealing diagnosis method, comprising the following steps:

[0006] When it is necessary to perform a sealing test on the target control valve, the target working condition of the air spring system is currently obtained, 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 non-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;

[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 reduced value of the empty spring height, the air tank pressure value, and the increased value of the pipeline pressure.

[0009] In combination with the first aspect, in one implementation, 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 a target control object for the target pressure relief valve sealing detection;

[0011] When the target working condition is the air tank air replenishment 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 combination with the first aspect, in one implementation, the performing of on-off control on the target control object and determining the sealing property 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 of 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 object is 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 pressure value of the air tank;

[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 the target pressure relief valve is determined to be in an unclosed state if the two first empty spring height reduction values ​​are both 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.

[0018] In combination with the first aspect, in one implementation, when the target control valve includes a target gas tank distribution valve and a target empty spring distribution valve, determining the target control object based on the target working condition includes:

[0019] When the target working condition is a non-adjustment action condition, the air 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 air spring distribution valve.

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

[0021] Control the air spring distribution valve, the gas tank distribution valve and the pressure relief valve to be in a 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 unclosed 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 distribution valve is in a closed state and the target gas storage tank distribution valve is in an unclosed state.

[0026] In combination with the first aspect, in one implementation, 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 an empty spring inflation working condition, the air pump and / or 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 an 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 combination with the first aspect, in one implementation, the performing of on-off control on the target control object and determining the sealing property 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 of the two empty springs located on the diagonal line;

[0031] When the target control objects are the pressure relief valve and the empty spring distribution valve, the pressure relief valve and the empty spring distribution valve are controlled to be in an open state, so as to obtain a third empty spring height reduction value of two empty springs located on a 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 distribution 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 it is necessary to perform a sealing test on 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, which is used to determine 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;

[0036] A diagnostic control module is used to perform opening and closing control on 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 gas tank pressure value, and a pipeline pressure increase value.

[0037] In conjunction with the second aspect, in one implementation, 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 a target control object for the target pressure relief valve sealing detection;

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

[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 implementation, the diagnosis control module is specifically configured to:

[0042] When the target control object is the air spring distribution valve and the height difference of 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 object is 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 pressure value of the air tank;

[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 the target pressure relief valve is determined to be in an unclosed state if the two first empty spring height reduction values ​​are both 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.

[0046] In combination with the second aspect, in one implementation, 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 non-adjustment action condition, the air 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 air spring distribution valve.

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

[0049] Control the air spring distribution valve, the gas tank distribution valve and the pressure relief valve to be in a 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 unclosed 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 distribution valve is in a closed state and the target gas storage tank distribution valve is in an unclosed state.

[0054] In combination with the second aspect, in one implementation, 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 an empty spring inflation working condition, the air pump and / or 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 an 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 implementation, 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 of the two empty springs located on the diagonal line;

[0059] When the target control objects are the pressure relief valve and the empty spring distribution valve, the pressure relief valve and the empty spring distribution valve are controlled to be in an open state, so as to obtain a third empty spring height reduction value of two empty springs located on a 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 distribution 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 brought by the technical solution provided in the embodiments of the present application include:

[0064] By obtaining the 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 based on different working conditions, the target control object corresponding to the target pressure relief valve, the target air spring distribution valve or the target air tank distribution valve is determined, 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; then the target control object is opened and closed, and the sealing detection of the target pressure relief valve, the target air spring distribution valve or the target air tank distribution valve is realized based on at least one control result of the air spring height reduction value, the air tank pressure value and the pipeline pressure increase value. 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 scene. 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 of 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 solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

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

[0070] In a first aspect, an embodiment of the present application provides a method for diagnosing the sealing property 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 the present application. Figure 1 As shown, 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 operating condition of the air spring system, the target operating 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 closure (i.e., the object to be tested). For example, if the pressure relief valve needs to be tested for closure, 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 closure can also become target control valves. In addition, the target operating condition in this embodiment refers to any one of the air tank air replenishment condition, air spring inflation condition, air spring deflation condition and no adjustment action condition (i.e., the condition in which no operation such as air tank air 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 a 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 a determination can be made as to whether the air spring system has any faults. If a fault exists, the ASC (Air Suspension Controller) controller will issue a system fault alarm. If no fault exists, it will be determined that a sealing test of the target control valve is required, and the current target operating condition of the air spring system will be obtained.

[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 the present 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 objects include at least one of an air spring distribution valve, an air tank distribution valve, an air pump and a 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] Exemplarily, in this embodiment, for different objects to be detected, different target control objects are individually or combinedly opened and closed, so that the height of the empty spring, the pressure of the gas tank or the pipeline pressure change and the empty spring height reduction value, the gas tank pressure value or the pipeline pressure increase value are determined to obtain the control result, and then the closedness detection of the target pressure relief valve, the target empty spring distribution valve or the target gas tank distribution valve can be realized according to the empty spring height reduction value, the gas tank pressure value or the pipeline pressure increase value and the size relationship between the above three and their corresponding thresholds. It can be seen that through this embodiment, the closedness detection of the pressure relief valve, the empty spring distribution valve and the gas tank distribution valve under different working conditions can be effectively realized to complete the rapid positioning of the fault position, thereby speeding up the after-sales investigation speed, thereby saving after-sales work hours, and also improving the coverage of the diagnosis scene.

[0080] Further, 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 a target control object for the target pressure relief valve sealing detection;

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

[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] Exemplarily, in this embodiment, when the target control valve is a target pressure relief valve, the corresponding target control object will be determined for different target working conditions of the air spring system. Specifically, if the target working condition is a no-adjustment action working condition, the air spring distribution valve is used as the target control object to implement the closure detection of the target pressure relief valve; if the target working condition is a gas tank air replenishment working condition, the air pump and the air tank distribution valve are used as the target control objects to implement the closure detection of the target pressure relief valve; and if the target working condition is an air spring charging working 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 the target control objects to implement the closure detection 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 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 fast lifting of the empty spring can be achieved through the combination of 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 the target control objects to effectively increase the lifting speed of the empty spring, 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 taken 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 taken 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 opening and closing control on the target control object and determining the sealing property 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 of 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 object is 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 pressure value of the air tank;

[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 the target pressure relief valve is determined to be in an unclosed state if the two first empty spring height reduction values ​​are both 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.

[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 gas tank is normal; wherein, the specific value settings of the height difference threshold, the first reduction value threshold, the second reduction value threshold and the pressure threshold may be determined by considering the impact of special road conditions and other working conditions on the detection results or by 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 operation 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 gas of the left and right air spring distribution valves to be interconnected, 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 closure 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 unclosed 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 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, it can be limited to whether the empty spring height reduction values ​​of the left and right empty springs are both greater than 8mm within a preset time period (for example, within 5s) to detect the closure of the target pressure relief valve, so as to further improve the precision and accuracy of the pressure relief valve closure detection.

[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 be increased; 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 closure 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 3bar.

[0096] Specifically, if the gas tank pressure P is less than 3 bar, the target pressure relief valve is determined to be in an unclosed state, and the ASC system will alarm 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 alarm that the target pressure relief valve is not tightly closed. It should be noted that since the opening of the pressure relief valve will affect the gas leakage rate, and thus affect the speed of change of the gas tank pressure, in order to avoid the influence of the pressure relief valve opening on the test results, it can be limited to whether the gas tank pressure P is less than 3 bar within the preset gas tank replenishment time period (for example, within 10 seconds) to detect the closure of the target pressure relief valve, so as to further improve the precision and accuracy of the pressure relief valve closure detection.

[0097] In addition, when 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 pressure relief valve is tightly closed, then under normal circumstances, the height of the air spring should be increased; based on this, the closure 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 10 mm.

[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 unclosed state, and the ASC system will alarm 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 alarm that the target pressure relief valve is not tightly closed. It should be noted that since the opening 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, it can be limited to whether the empty spring height reduction value is greater than 10mm within the preset empty spring inflation time period (for example, within 5s) to detect the closure of the target pressure relief valve, so as to further improve the precision and accuracy of the pressure relief valve closure detection.

[0099] Further, 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 non-adjustment action condition, the air 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 air spring distribution valve.

[0101] Exemplarily, 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 opening and closing control of the target control object and determining the sealing property of the target control valve based on the control result include:

[0103] Control the air spring distribution valve, the gas tank distribution valve and the pressure relief valve to be in a 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 unclosed 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 distribution valve is in a closed state and the target gas storage tank distribution 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 increase value threshold refers to the threshold used to determine whether the increase in the height of the empty spring is normal; wherein, the specific value settings of the pressure difference threshold and the first increase value threshold can be determined according to actual needs or through test calibration, and are not limited here. For example, the pressure difference threshold is set to 4 bar and the first increase 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 the opening of the air pump and the air tank distribution valve, but not 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 value is greater than 8mm, it is determined that the target empty spring distribution valve is in an unclosed state, and the ASC system will alarm that the target empty spring distribution valve has a problem of lax closure; and if the second empty spring height decrease value is not greater than 8mm, it is determined that the target gas tank distribution valve is in an unclosed state, and the ASC system will alarm that the target gas tank distribution valve has a problem of lax closure. 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 change rate of the pipeline pressure and the empty spring height, in order to avoid the influence of the opening of the empty spring distribution valve and the gas tank distribution valve on the detection result, it can be limited to whether the pipeline pressure increase value △P is greater than 4bar within the preset static time period (for example, within 20s) and whether the second empty spring height decrease value is greater than 8mm within the preset gas tank filling time period (for example, within 5s) to detect the sealing of the target empty spring distribution valve and the target gas tank distribution valve, 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] Further, 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 an empty spring inflation working condition, the air pump and / or 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 an 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 closure 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 closure detection of the target air spring distribution valve.

[0116] Furthermore, in one embodiment, the opening and closing control of the target control object and determining the sealing property of the target control valve based on the control result include:

[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 of the two empty springs located on the diagonal line;

[0118] When the target control objects are the pressure relief valve and the empty spring distribution valve, the pressure relief valve and the empty spring distribution valve are controlled to be in an open state, so as to obtain a third empty spring height reduction value of two empty springs located on a 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 distribution 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 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 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 closure 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 closure of the target air spring distribution valve can be detected 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 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 of the air spring distribution valve on the test results, it can be limited to whether the height increase of the air spring is greater than 8mm within the preset air spring inflation time period (for example, within 5s) to detect the closure of the target air spring distribution valve, so as to further improve the precision and accuracy of the air spring distribution valve closure detection.

[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 higher; 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 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 of the air spring distribution valve on the test results, it can be limited to whether the air spring height reduction value is greater than 8mm within the preset air spring deflation time period (for example, within 5s) to detect the closure of the target air spring distribution valve, so as to further improve the precision and accuracy of the air spring distribution valve closure detection.

[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 as to intelligently detect whether the control valve has a loose closing fault, so as to avoid manual inspection and disassembly that takes a lot of man-hours, and 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 also 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 a closedness diagnostic device for a control valve of the present 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 it is necessary to perform a sealing test on 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, which is used to determine 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;

[0130] A diagnostic control module is used to perform opening and closing control on 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 gas tank pressure value, and a pipeline pressure increase value.

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

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

[0133] When the target working condition is the air tank air replenishment 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 used for:

[0136] When the target control object is the air spring distribution valve and the height difference of 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 object is 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 pressure value of the air tank;

[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 the target pressure relief valve is determined to be in an unclosed state if the two first empty spring height reduction values ​​are both 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.

[0140] Furthermore, 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:

[0141] When the target working condition is a non-adjustment action condition, the air 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 air spring distribution valve.

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

[0143] Control the air spring distribution valve, the gas tank distribution valve and the pressure relief valve to be in a 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 unclosed 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 distribution valve is in a closed state and the target gas storage tank distribution valve is in an unclosed state.

[0148] Further, 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 an empty spring inflation working condition, the air pump and / or 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 an 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 diagnosis 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 of the two empty springs located on the diagonal line;

[0153] When the target control objects are the pressure relief valve and the empty spring distribution valve, the pressure relief valve and the empty spring distribution valve are controlled to be in an open state, so as to obtain a third empty spring height reduction value of two empty springs located on a 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 distribution 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 diagnosis 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 The hardware structure diagram of the control valve sealing diagnosis device involved in the embodiment of the present application is shown in FIG. 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, the memory, and the communication interface.

[0159] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces for interconnecting devices within the closed diagnostic device for control valves, and interfaces for interconnecting the closed diagnostic device for control valves with other devices (such as other computing devices or user devices). The physical interface may be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device may be a display, a keyboard, etc.

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

[0162] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[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 only for description 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 "first", "second" and "third" to different types.

[0168] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

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

[0170] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[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 a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

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

Claims

1. A method for diagnosing the sealing performance of a control valve, characterized in that: The following steps are involved: When it is necessary to perform a sealing test on the target control valve, the target working condition of the air spring system is currently obtained, 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 non-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; 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; 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 reduced value of the empty spring height, the air tank pressure value, and the increased value of the pipeline pressure.

2. The control valve sealing diagnosis method according to claim 1, characterized in that: 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 a target control object for the target pressure relief valve sealing detection; When the target working condition is the working condition of replenishing the gas tank, the air pump and the gas tank distribution valve are used as the target control objects for the sealing detection of the target pressure relief valve; 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.

3. The control valve sealing diagnosis method according to claim 2, characterized in that: The 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 includes: When the target control object is the air spring distribution valve and the height difference of 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 object is 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 pressure value of the air tank; 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 the target pressure relief valve is determined to be in an unclosed state if the two first empty spring height reduction values ​​are both 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.

4. 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 air spring distribution valve, determining the target control object based on the target working condition includes: When the target working condition is a non-adjustment action condition, the air 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 air spring distribution valve.

5. The control valve sealing diagnosis method according to claim 4, characterized in that: The 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 includes: Control the air spring distribution valve, the gas tank distribution valve and the pressure relief valve to be in a 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 unclosed 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 distribution valve is in a closed state and the target gas storage tank distribution valve is in an unclosed state.

6. 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 an empty spring inflation working condition, the air pump and / or 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 an 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.

7. The control valve sealing diagnosis method according to claim 6, characterized in that: The 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 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 of the two empty springs located on the diagonal line; When the target control objects are the pressure relief valve and the empty spring distribution valve, the pressure relief valve and the empty spring distribution valve are controlled to be in an open state, so as to obtain a third empty spring height reduction value of two empty springs located on a 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 distribution valve is in an unclosed state.

8. 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 it is necessary to perform a sealing test on 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, which is used to determine 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; A diagnostic control module is used to perform opening and closing control on 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 gas tank pressure value, and a pipeline pressure increase value.

9. 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 as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium 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 according to any one of claims 1 to 7 are implemented.

Images