Air suspension calibration method and vehicle

Abstract

The invention discloses an air suspension calibration method and a vehicle, and belongs to the technical field of vehicles, the vehicle is calibrated at a preset altitude position, and an ascending fault threshold value, an air supply fault threshold value, a first service life threshold value and a second service life threshold value are used as calibration parameters of an air suspension; the related threshold value of the altitude corresponding to the preset altitude position where the vehicle is located can be obtained, the rising fault threshold value is determined through rising of the rising speed, the air supply fault threshold value is determined through the air supply speed, the first service life threshold value is obtained through prediction of the first working time, and the second service life threshold value is obtained through prediction of the second working time and the distance. The air suspension is calibrated at multiple positions at different altitudes, a set basis can be provided for detection threshold values during operation fault detection of a compressor, an air storage tank and the air suspension, and the calibration effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an air suspension calibration method and a vehicle. Background Art

[0002] When the vehicle's air suspension works in a low-pressure environment at high altitudes, it is prone to false alarms, system component damage, or poor system performance. The fault detection system of the air suspension at high altitudes is affected by the low-pressure environment, resulting in the need to recalibrate the fault detection threshold. However, the existing air suspension calibration method lacks a unified standard, resulting in poor calibration results. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an air suspension calibration method, which calibrates the air suspension at multiple locations at different altitudes, and can provide a basis for setting the detection threshold value when detecting the operating fault of the compressor, the air tank and the air suspension, thereby improving the calibration effect.

[0004] According to an air suspension calibration method of an embodiment of a first aspect of the present invention, the air suspension is used to calibrate an air suspension of a vehicle, wherein the air suspension is connected to a body of the vehicle, and the air suspension includes a compressor and an air tank. The air suspension calibration method includes: moving the vehicle to a preset altitude; Controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body; determining a rising fault threshold of the air suspension according to the rising rate; Controlling the compressor to inflate the air storage tank and obtaining the air filling rate of the air storage tank; Determining a gas replenishment failure threshold of the gas storage tank according to the gas replenishment rate; Changing the load of the vehicle and controlling the compressor to maintain the vehicle body at a preset height, and obtaining a first working time of the compressor; predicting a first life threshold of the compressor according to the first working time; Controlling the vehicle to travel at a preset speed, controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle; predicting a second life threshold of the compressor according to the second working time and the distance; The rising fault threshold, the air supplement fault threshold, the first life threshold and the second life threshold are used as calibration parameters of the air suspension.

[0005] The air suspension calibration method according to the embodiment of the present invention has at least the following beneficial effects: the vehicle is calibrated at a preset altitude, the height of the vehicle body is raised by the air suspension to obtain the ascent rate, the air tank is inflated by the compressor to obtain the air replenishment rate, the first working time of the compressor is obtained by changing the load of the vehicle and maintaining the preset height of the vehicle body by the compressor, and the air suspension is controlled to adjust the vehicle body height during the vehicle driving at a preset speed to obtain the second working time of the compressor; therefore, according to the ascent fault threshold, the air replenishment fault threshold, the first life threshold and the second life threshold as calibration parameters of the air suspension, the relevant thresholds of the altitude corresponding to the preset altitude position of the vehicle can be obtained, the ascent fault threshold is determined by the ascent rate, the air replenishment fault threshold is determined by the air replenishment rate, the first life threshold is obtained by predicting the first working time, and the second life threshold is obtained by predicting the second working time and the distance, and the air suspension is calibrated at multiple locations with different altitudes, which can provide a setting basis for the detection thresholds of the compressor, the air tank and the air suspension during the operation fault detection, thereby improving the calibration effect.

[0006] According to some embodiments of the present invention, changing the load of the vehicle and controlling the compressor to maintain the vehicle body at a preset height, and obtaining the first working time of the compressor includes: Changing the load multiple times so that the vehicle switches between an empty state, a designed load and a fully loaded state; After each change in the load weight, controlling the compressor to adjust the vehicle body back to the preset height, and obtaining a first operation time of each operation of the compressor; The first working time is calculated according to the sum of all the first operating time periods.

[0007] According to some embodiments of the present invention, the multiple changes in the load weight so that the vehicle switches between an unloaded state, a designed load, and a fully loaded state include: configuring the vehicle to be in an unloaded state; adding a first counterweight to the vehicle to transform the vehicle into a design load; Removing the first counterweight to transform the vehicle into the no-load state; adding a second counterweight to the vehicle to convert the vehicle into a fully loaded state; Removing the second counterweight transforms the vehicle into the unloaded state.

[0008] According to some embodiments of the present invention, controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle includes: When the air pressure of the air storage tank is greater than or equal to a first preset air pressure, controlling the compressor to stop inflating the air storage tank; The compressor and the gas storage tank are controlled to adjust the vehicle body so that the vehicle body switches among a first height, a second height, and a third height, wherein the second height is higher than the first height, and the third height is higher than the second height.

[0009] According to some embodiments of the present invention, controlling the compressor and the gas storage tank to adjust the vehicle body so that the vehicle body switches between a first height, a second height, and a third height includes: controlling the vehicle body to switch between the first height and the second height multiple times, and obtaining a second operating time of the compressor after each switching; controlling the vehicle body to switch between the second height and the third height multiple times, and obtaining a third operating time of the compressor after each switching; The obtaining of the second working time of the compressor and the distance traveled by the vehicle comprises: The second working time is calculated according to the sum of all the second operating time periods and all the third operating time periods.

[0010] According to some embodiments of the present invention, controlling the compressor to inflate the air storage tank and obtaining the air replenishment rate of the air storage tank includes: After the air pressure of the air storage tank is adjusted to the second preset air pressure, controlling the compressor to increase the air pressure of the air storage tank to a third preset air pressure; Acquire a first filling rate of the gas storage tank; The step of determining the gas replenishment failure threshold of the gas storage tank according to the gas replenishment rate includes: A first inflation fault threshold is obtained according to the first inflation rate.

[0011] According to some embodiments of the present invention, controlling the compressor to inflate the air storage tank and obtaining the air replenishment rate of the air storage tank includes: After the air pressure of the air storage tank is adjusted to a fourth preset air pressure, the compressor is controlled to increase the air pressure of the air storage tank to a fifth preset air pressure, and the compressor is controlled to stop inflating the air storage tank; Acquire a second filling rate of the gas storage tank; The step of determining the gas replenishment failure threshold of the gas storage tank according to the gas replenishment rate includes: A second gas replenishment fault threshold is obtained according to the second gas filling rate.

[0012] According to some embodiments of the present invention, controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body includes: When the gas pressure of the gas storage tank is less than or equal to a sixth preset gas pressure, controlling the gas storage tank to stop outputting gas to the outside; Controlling the compressor to raise the height of the vehicle body to obtain a first ascending rate of the vehicle body; The determining the rising fault threshold of the air suspension according to the rising rate includes: A first rising fault threshold is obtained according to the first rising rate.

[0013] According to some embodiments of the present invention, controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body includes: When the air pressure of the air storage tank is greater than or equal to a seventh preset air pressure, controlling the compressor to stop charging the air storage tank; Controlling the compressor and the gas storage tank to raise the height of the vehicle body, and obtaining a second ascending rate of the vehicle body; The determining the rising fault threshold of the air suspension according to the rising rate includes: A second rising fault threshold is obtained according to the second rising rate.

[0014] According to the vehicle of the second aspect of the present invention, the vehicle has an air suspension, and the air suspension is calibrated using the air suspension calibration method described in the above embodiment.

[0015] The vehicle according to the embodiment of the present invention has at least the following beneficial effects: based on the rising fault threshold, the air replenishment fault threshold, the first life threshold and the second life threshold as calibration parameters of the air suspension, the relevant thresholds of the altitude corresponding to the preset altitude position of the vehicle can be obtained, the rising fault threshold is determined by the rising rate, the air replenishment fault threshold is determined by the air replenishment rate, the first life threshold is obtained by the first working time prediction, and the second life threshold is obtained by the second working time and distance prediction. The air suspension is calibrated at multiple locations with different altitudes, which can provide a basis for setting the detection thresholds for operating fault detection of the compressor, air tank and air suspension, thereby improving the calibration effect.

[0016] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of an air suspension calibration method according to an embodiment of the present invention; Figure 2 is a flow chart for obtaining the first working time of the compressor in one embodiment of the present invention; Figure 3 is a flow chart of changing the load capacity multiple times in one embodiment of the present invention; Figure 4 is a flow chart of adjusting the vehicle height multiple times in one embodiment of the present invention; Figure 5 is a flow chart for obtaining the second working time of the compressor in one embodiment of the present invention; Figure 6 is a flow chart of obtaining a first filling rate of a gas storage tank in one embodiment of the present invention; Figure 7 is a flow chart of obtaining a second filling rate of a gas storage tank in one embodiment of the present invention; Figure 8 is a flow chart for determining a gas replenishment fault threshold of a gas storage tank in one embodiment of the present invention; Fig. 9 is a flow chart for obtaining a first rising rate of a vehicle body in one embodiment of the present invention; Fig.10 is a flow chart for obtaining a second rising rate of a vehicle body in one embodiment of the present invention; Fig.11 The present invention is a flowchart of determining a rising fault threshold of an air suspension according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as front, rear, top, bottom, axial, and circumferential are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, it should be noted that the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0023] In related technologies, the air suspension will determine the height change of the vehicle body according to different road conditions and the signal from the distance sensor, and then control the compressor and exhaust valve to automatically compress or extend the spring, thereby lowering or raising the ground clearance of the vehicle chassis to increase the stability of the vehicle body or the passability in complex road conditions.

[0024] The air suspension system is more sensitive to the low-pressure environment of the plateau. When the vehicle is driving in the plateau, the air suspension system is prone to false alarms, system component damage or poor system performance. Therefore, calibration and testing in the plateau environment are required. Currently, there is no unified calibration method in the industry, resulting in low calibration efficiency, unsatisfactory calibration results, and even erroneous calibration results.

[0025] At present, the fault diagnosis functions related to the plateau working environment in the air suspension include compressor pressure buildup fault detection, vehicle height rise fault detection and air tank air replenishment fault detection.

[0026] Compressor pressure buildup fault detection: Detect the air pressure output rate during the operation of the compressor. If the air pressure output rate is lower than the set threshold, it is judged that the compressor pressure buildup fault occurs.

[0027] Vehicle height rise fault detection: monitor the height change rate during the vehicle height rise adjustment process. If the height change rate is lower than the set threshold, it is judged that the vehicle height rise fault occurs.

[0028] Gas tank refill fault detection: monitor the rate of change of gas tank air pressure during the gas tank refill process. If the rate of change of air pressure is lower than the set threshold, it is judged that the gas tank refill fault occurs.

[0029] Based on this, an embodiment of the present invention provides an air suspension calibration method, which calibrates the air suspension at multiple locations at different altitudes. It can provide a basis for setting detection thresholds for operating fault detection of compressors, air tanks and air suspensions, thereby improving the calibration effect.

[0030] refer to Figures 1 to 11 An air suspension calibration method according to an embodiment of the present invention is described. The air suspension calibration method is used to calibrate the air suspension of a vehicle. The air suspension is connected to the vehicle body. The air suspension can adjust the height of the vehicle body. The air suspension includes a compressor and an air tank.

[0031] Reference Figure 1 As shown, the air suspension calibration method according to the embodiment of the present invention includes the following steps.

[0032] Step S100, moving the vehicle to a preset altitude.

[0033] The vehicle is transferred to a preset altitude and the relevant parameters of the air suspension are calibrated at the altitude of the preset altitude, so as to accurately test the working conditions of the air suspension in different altitude environments.

[0034] Step S200, controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body.

[0035] When the vehicle is at a preset altitude, start the air suspension to lift the vehicle body to obtain the working condition of the air suspension at that altitude. The lifting rate can be obtained by measuring the change in the vehicle body's height from the ground per unit time; the lifting time and lifting distance taken by the vehicle body to rise to a specified height can also be recorded, and the lifting rate can be calculated by the lifting distance and lifting time.

[0036] Step S300, determining a rising fault threshold of the air suspension according to the rising rate.

[0037] When the air suspension is working at the altitude corresponding to the preset altitude position, the rising rate can be used as the rising fault threshold of the air suspension at the altitude. When the vehicle is at the altitude corresponding to the preset altitude position, the height change rate during the vehicle height rising adjustment process is monitored. If the height change rate is lower than the rising fault threshold, it is determined that the vehicle height rises fault.

[0038] Of course, by repeating the above steps S200 and S300 multiple times, multiple rising rates can be obtained, and then data analysis and sorting can be performed to remove abnormal data, calculate the average value of the multiple rising rates, and use the average value as the rising fault threshold; or after removing abnormal data from multiple rising rates, find the minimum rising rate as the rising fault threshold.

[0039] Step S400, controlling the compressor to inflate the air storage tank and obtaining the air filling rate of the air storage tank.

[0040] When the vehicle is at a preset altitude, start the compressor to fill the air tank with gas, and get the air replenishment rate by measuring the air pressure change in the air tank per unit time. You can also record the initial air pressure of the air tank from the beginning of air replenishment, the final air pressure after the air replenishment is completed, the air replenishment time consumed in the air replenishment process, etc., and calculate the air replenishment rate through the initial air pressure, final air pressure, and air replenishment time.

[0041] Step S500, determining a gas replenishment fault threshold of the gas storage tank according to the gas replenishment rate.

[0042] When the air suspension is working at the altitude corresponding to the preset altitude position, the air filling rate can be used as the air filling fault threshold of the air suspension at the altitude. When the vehicle is at the altitude corresponding to the preset altitude position, the air tank pressure change rate during the air filling process of the air tank is monitored. If the air pressure change rate is lower than the air filling fault threshold, it is determined that the air tank is faulty.

[0043] Of course, by repeating the above steps S400 and S500 multiple times, multiple gas replenishment rates can be obtained, and then data analysis and sorting can be performed to remove abnormal data, calculate the average value of the multiple gas replenishment rates, and use the average value as the gas replenishment fault threshold; or after removing abnormal data from multiple gas replenishment rates, find the minimum gas replenishment rate as the gas replenishment fault threshold.

[0044] Step S600, changing the load of the vehicle and controlling the compressor to maintain the vehicle body at a preset height, and obtaining the first working time of the compressor.

[0045] The air suspension works at the altitude corresponding to the preset altitude position. The air suspension operates in a low-pressure environment. When the air suspension maintains the vehicle body at the preset height, the compressor needs to run for a period of time to maintain the vehicle body at the preset height. It is understandable that due to the difference between the low pressure environment at high altitudes and the normal pressure environment at low altitudes, the compressor operation time will be different when the vehicle's air suspension maintains the vehicle body height at high altitudes and low altitudes.

[0046] Therefore, in this embodiment, the load weight of the vehicle is changed to trigger the compressor to maintain the vehicle body at a preset height, and then the operating time of the compressor is recorded as the first working time. Multiple first working times can be obtained by repeating step S600 multiple times, so as to obtain accurate compressor operating time.

[0047] Step S700: predicting a first life threshold of the compressor according to the first working time.

[0048] When the air suspension maintains the vehicle body at a preset height at the altitude corresponding to the preset altitude position, the first working time can be used as the operating time of the compressor to maintain the vehicle body height each time at the altitude. Then, the vehicle manufacturer can use big data to retrieve the theoretical number of times the air suspension maintains the vehicle body height of the same type of vehicles within the warranty mileage. The theoretical working time can be predicted by multiplying the theoretical number by the first working time. The theoretical working time is used as the first life threshold of the compressor, and then the theoretical working life of the compressor is obtained. The first life threshold is compared with the theoretical working life. Only when the theoretical working life is greater than the first life threshold can it be ensured that the compressor of the air suspension can operate normally within the warranty mileage.

[0049] Of course, by repeating the above steps S600 and S700 multiple times, multiple first working times can be obtained, and then data analysis and sorting can be performed to remove abnormal data, calculate the average value of the multiple first working times, and use the average value to predict the first life threshold; or after removing abnormal data from multiple first working times, find the largest first working time to predict the first life threshold.

[0050] Step S800, controlling the vehicle to travel at a preset speed, controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle.

[0051] The vehicle travels at a preset speed, and the air suspension is set so that the air suspension adjusts the height of the vehicle body during the vehicle travel. The compressor runs for a second working time during the height adjustment of the vehicle body, and the distance traveled by the vehicle in the above process is obtained. The distance can be calculated by multiplying the preset speed by the vehicle travel time, and then the second working time and the distance can be associated. In other words, by simulating complex road conditions, the air suspension is made to continuously adjust the height of the vehicle body during the distance, and the compressor needs to run for the second working time.

[0052] Step S900: predicting a second life threshold of the compressor according to the second working time and distance.

[0053] By obtaining the warranty mileage of the vehicle, the following relationship can be obtained: the ratio of the warranty mileage to the distance should be equal to the ratio of the second life threshold to the second working time. The above relationship assumes that the vehicle keeps the air suspension in a state of adjusting the body height during the entire warranty mileage. The second life threshold is predicted by the above relationship.

[0054] Then obtain the theoretical working life of the compressor, and compare the second life threshold with the theoretical working life. Only when the theoretical working life is greater than the second life threshold can it be ensured that the compressor of the air suspension can operate normally within the warranty mileage.

[0055] Step S1000: using the rising fault threshold, the air filling fault threshold, the first life threshold and the second life threshold as calibration parameters of the air suspension.

[0056] The vehicle is calibrated at a preset altitude, the height of the vehicle body is raised by the air suspension to obtain the ascent rate, the air tank is inflated by the compressor to obtain the air replenishment rate, the load of the vehicle is changed and the preset height of the vehicle body is maintained by the compressor to obtain the first working time of the compressor, and the air suspension is controlled to adjust the height of the vehicle body while the vehicle is traveling at a preset speed to obtain the second working time of the compressor.

[0057] Therefore, based on the rising fault threshold, the air replenishment fault threshold, the first life threshold and the second life threshold as the calibration parameters of the air suspension, the relevant thresholds corresponding to the preset altitude position of the vehicle can be obtained, the rising fault threshold is determined by the rising rate, the air replenishment fault threshold is determined by the air replenishment rate, the first life threshold is obtained by the first working time prediction, and the second life threshold is obtained by the second working time and distance prediction. Calibrating the air suspension at multiple locations with different altitudes can provide a basis for setting the detection thresholds for operating fault detection of the compressor, air tank and air suspension, thereby improving the calibration effect.

[0058] In some embodiments, step S100, moving the vehicle to a preset altitude, includes the following steps.

[0059] Step S110, configuring the preset altitude position to be greater than or equal to 500m altitude.

[0060] The vehicle may be moved to a preset altitude position at an altitude of 500 m and above to calibrate the relevant thresholds for air suspension fault detection at an altitude of 500 m and above.

[0061] In some embodiments, reference Figure 2 As shown, step S600, changing the load weight of the vehicle and controlling the compressor to maintain the vehicle body at a preset height, obtaining the first working time of the compressor, includes the following steps.

[0062] Step S610, changing the load weight multiple times so that the vehicle switches between an empty state, a designed load and a fully loaded state.

[0063] When the air suspension adjusts the height of the vehicle body, the driver is generally allowed to control the height of the vehicle body by operating the vehicle controller. Currently, it is more common to divide the vehicle body height adjustment mode into lower vehicle height, standard vehicle height and higher vehicle height. The driver can adjust the vehicle body to any of the above modes through buttons. In this embodiment, the preset height is a lower vehicle height.

[0064] Of course, the preset height can also be set according to calibration requirements.

[0065] The vehicle applies different pressures to the air suspension under different load conditions, so when the vehicle's load changes, the height of the vehicle body will change, which can further trigger the air suspension to adjust the height of the vehicle body to maintain the original height setting.

[0066] In this embodiment, by changing the load capacity of the vehicle, the vehicle is in an unloaded state when there is no load at all, the vehicle is in a designed load state by increasing the rated weight of the vehicle, and the vehicle is in a fully loaded state by increasing the load until the maximum load capacity is reached.

[0067] Step S620, after each change in the load weight, control the compressor to adjust the vehicle body back to a preset height, and obtain the first operating time of each operation of the compressor.

[0068] When the vehicle load changes, the air suspension adjusts the height of the vehicle body to restore the vehicle body to a preset height. In this embodiment, the air pressure of the air storage tank is adjusted to below the start threshold, so that the vehicle height adjustment process only uses the compressor as the air source, and does not use the air storage tank or the boost mode as the air source. Since the air storage tank does not participate in the vehicle height adjustment process, it can ensure that the compressor can maintain a longer operating time.

[0069] A plurality of first operation durations in the vehicle height adjustment process are obtained.

[0070] Step S630: Calculate the first working time according to the sum of all first operating time periods.

[0071] The first working time is obtained by calculating the sum of multiple first operating time periods. It can be considered that: when the vehicle's air suspension is in the process of maintaining the vehicle body at a preset height, the air tank does not participate in the above-mentioned vehicle height adjustment process, and the compressor operates and maintains the height of the vehicle body throughout the whole process. The operating time of the compressor in the above-mentioned operating process is the first working time.

[0072] Then, the vehicle manufacturer uses big data to retrieve the theoretical number of times the air suspension maintains the body height of the same type of vehicle within the warranty mileage. The theoretical working time can be obtained by multiplying the theoretical number by the first working time. The theoretical working time is used as the first life threshold of the compressor, and then the theoretical working life of the compressor is obtained. The first life threshold is compared with the theoretical working life. Only when the theoretical working life is greater than the first life threshold can it be ensured that the air suspension compressor can operate normally within the warranty mileage. In some embodiments, reference Figure 3 As shown, step S610, changing the load weight multiple times to switch the vehicle between an empty state, a designed load and a fully loaded state, includes the following steps.

[0073] Step S611, configuring the vehicle to be in an unloaded state.

[0074] The vehicle has no additional load and is in an empty state.

[0075] Step S612: adding a first counterweight to the vehicle to convert the vehicle into a designed load.

[0076] Adding a first counterweight to the vehicle causes the vehicle body and air suspension to bear the weight, placing the vehicle at a designed load, thereby causing the air suspension to be squeezed by the added weight, causing the vehicle body to drop, thereby triggering the air suspension to maintain the vehicle body height and controlling the compressor to lift the vehicle body to a preset height.

[0077] Step S613, removing the first counterweight to transform the vehicle into an unloaded state.

[0078] The first counterweight is removed to return the vehicle to an unloaded state. As the air suspension loses pressure, the vehicle body rises, triggering the air suspension to maintain the height of the vehicle body. The exhaust valve is used to exhaust air to lower the vehicle body to a preset height.

[0079] Step S614: adding a second counterweight to the vehicle to transform the vehicle into a fully loaded state.

[0080] Adding a second counterweight to the vehicle causes the vehicle body and air suspension to bear the weight, placing the vehicle in a fully loaded state. The air suspension is then squeezed by the added weight, causing the vehicle body to drop, thereby triggering the air suspension to maintain the vehicle body height and controlling the compressor to lift the vehicle body to a preset height.

[0081] It can be understood that when the vehicle switches from an unloaded state to a fully loaded state, the compressor needs to provide a first air pressure, and the compressor running time is a first time length; when the vehicle switches from an unloaded state to a designed load, the compressor needs to provide a second air pressure, and the compressor running time is a second time length; therefore, the first air pressure will be greater than the second air pressure, and similarly, the first time length will be greater than the second time length.

[0082] By obtaining the first time duration and the second time duration to reasonably evaluate the total operation time of the compressor during the above two switching states, a more stringent vehicle height maintenance situation is simulated to facilitate obtaining a more stringent detection threshold.

[0083] Step S615, removing the second counterweight to transform the vehicle into an unloaded state.

[0084] The second counterweight is removed to return the vehicle to an unloaded state. As the air suspension loses pressure, the vehicle body rises, triggering the air suspension to maintain the height of the vehicle body. The exhaust valve is used to exhaust air to lower the vehicle body to a preset height.

[0085] In some embodiments, reference Figure 4 As shown, step S800, controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle, includes the following steps.

[0086] Step S810: When the air pressure of the air storage tank is greater than or equal to the first preset air pressure, the compressor is controlled to stop inflating the air storage tank.

[0087] During the process of adjusting the vehicle height by the air suspension, the air pressure in the air tank is set to the first preset air pressure to ensure that the air tank is at the maximum working pressure, so that the compressor and the air tank work together to adjust the height of the vehicle body, and the compressor also needs to replenish gas to the air tank so that the air tank is at the maximum working pressure.

[0088] Step S820, controlling the compressor and the air tank to adjust the vehicle body so that the vehicle body switches among a first height, a second height, and a third height, wherein the second height is higher than the first height, and the third height is higher than the second height.

[0089] When the compressor and the air tank adjust the height of the vehicle body, the compressor also needs to replenish the air in the air tank to make it at the maximum working pressure, and then record the running time of the compressor.

[0090] In some embodiments, reference Figure 5 As shown, step S820, controlling the compressor and the air tank to adjust the vehicle body so that the vehicle body switches between the first height, the second height, and the third height, includes the following steps.

[0091] Step S821, controlling the vehicle body to switch between the first height and the second height multiple times, and obtaining the second operating time of the compressor after each switching.

[0092] The vehicle body is switched from the first height to the second height, and then switched from the second height to the first height, and a second operating time of the compressor in the above process is obtained.

[0093] The above process is repeated to obtain a plurality of second operating times of the compressor.

[0094] The above process can simulate more complex road conditions to simulate the vehicle body and air suspension being in a state of height adjustment during driving.

[0095] Step S822, controlling the vehicle body to switch between the second height and the third height multiple times, and obtaining the third operating time of the compressor after each switching.

[0096] The vehicle body is switched from the second height to the third height, and then switched from the third height to the second height, and a third operating time of the compressor in the above process is obtained.

[0097] The above process is repeated to obtain a plurality of third operating times of the compressor.

[0098] The above process can simulate more complex road conditions to simulate the vehicle body and air suspension being in a state of height adjustment during driving.

[0099] Step S800, controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle, also includes the following steps.

[0100] Step S823: Calculate the second working time according to the sum of all the second operating time periods and all the third operating time periods.

[0101] The second working time can be calculated by adding the sum of all second running times to the sum of all third running times.

[0102] By obtaining the warranty mileage of the vehicle, the following relationship can be obtained: the ratio of the warranty mileage to the distance should be equal to the ratio of the second life threshold to the second working time. The above relationship assumes that the air suspension of the vehicle is always in a state of adjusting the body height during the entire warranty mileage. The second life threshold is calculated through the above relationship.

[0103] In some embodiments, reference Figure 6 As shown, step S400, controlling the compressor to inflate the air storage tank and obtaining the air replenishment rate of the air storage tank, includes the following steps.

[0104] Step S410, after adjusting the air pressure of the air storage tank to the second preset air pressure, controlling the compressor to increase the air pressure of the air storage tank to the third preset air pressure.

[0105] The air storage tank can be adjusted to a second preset air pressure by exhausting air or filling the air storage tank with gas through a compressor, and the second preset air pressure is used as the starting air pressure for replenishing the air in the air storage tank.

[0106] The compressor is controlled to fill the gas into the gas tank, thereby increasing the gas pressure of the gas tank, and increasing the gas pressure of the gas tank from the second preset gas pressure to the third preset gas pressure, so as to simulate the process of the compressor replenishing gas to the gas tank.

[0107] Step S420, obtaining a first filling rate of the gas storage tank.

[0108] By recording the air pressure change and the air replenishment time of the air tank during the above process, the first inflation rate can be calculated by dividing the air pressure change by the air replenishment time. In this embodiment, the air pressure change is calculated by subtracting the second preset air pressure from the third preset air pressure, and then the air replenishment time from the second preset air pressure to the third preset air pressure is recorded, and the first inflation rate is calculated by dividing the air pressure change by the air replenishment time.

[0109] Reference Figure 8 As shown, step S500, determining the gas replenishment fault threshold of the gas storage tank according to the gas replenishment rate, includes the following steps.

[0110] Step S510: obtaining a first gas replenishment fault threshold according to a first gas filling rate.

[0111] When the air suspension is working at the altitude corresponding to the preset altitude position, the first inflation rate can be used as the first inflation fault threshold of the air suspension at the altitude. When the vehicle is at the altitude corresponding to the preset altitude position, the rate of change of the air pressure in the air tank during the air filling process of the air tank is monitored, and if the rate of change of the air pressure is lower than the first inflation fault threshold, it is determined that the air tank is at an inflation fault.

[0112] In some embodiments, reference Figure 7As shown, step S400, controlling the compressor to inflate the air storage tank and obtaining the air replenishment rate of the air storage tank, also includes the following steps.

[0113] Step S430, after adjusting the air pressure of the air storage tank to the fourth preset air pressure, controlling the compressor to increase the air pressure of the air storage tank to the fifth preset air pressure, and controlling the compressor to stop inflating the air storage tank.

[0114] The air storage tank can be adjusted to a fourth preset air pressure by exhausting air or by filling the air storage tank with gas through a compressor, and the fourth preset air pressure is used as the starting air pressure for replenishing the air storage tank.

[0115] The compressor is controlled to fill gas into the gas tank to increase the air pressure of the gas tank, so that the air pressure of the gas tank is increased from the fourth preset air pressure to the fifth preset air pressure, so as to simulate the process of the compressor replenishing air to the gas tank until the compressor can no longer continue to fill the gas tank. At this time, the gas tank is at the maximum working air pressure.

[0116] Step S440, obtaining a second filling rate of the gas storage tank.

[0117] By recording the air pressure change and the air replenishment time of the air tank during the above process, the second inflation rate can be calculated by dividing the air pressure change by the air replenishment time. In this embodiment, the air pressure change is calculated by subtracting the fourth preset air pressure from the fifth preset air pressure, and then the air replenishment time from the fourth preset air pressure to the fifth preset air pressure is recorded, and the second inflation rate is calculated by dividing the air pressure change by the air replenishment time.

[0118] Reference Figure 8 As shown, step S500, determining the gas replenishment fault threshold of the gas storage tank according to the gas replenishment rate, includes the following steps.

[0119] Step S520: obtaining a second gas replenishment fault threshold according to the second gas filling rate.

[0120] When the air suspension is working at the altitude corresponding to the preset altitude position, the second inflation rate can be used as the second inflation fault threshold of the air suspension at the altitude. When the vehicle is at the altitude corresponding to the preset altitude position, the rate of change of the air pressure in the air tank during the air filling process of the air tank is monitored, and if the rate of change of the air pressure is lower than the second inflation fault threshold, it is determined that the air tank is failing.

[0121] In some embodiments, reference Fig. 9 As shown, step S200, controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body, includes the following steps.

[0122] Step S210, when the gas pressure of the gas storage tank is less than or equal to the sixth preset pressure, the gas storage tank is controlled to stop outputting gas to the outside.

[0123] The air pressure of the air tank is set to the sixth preset air pressure, which can make the air pressure of the air tank lower than the starting threshold, so that the above-mentioned vehicle height adjustment process only uses the compressor as the air source, and does not use the air tank or the boost mode as the air source. Since the air tank does not participate in the above-mentioned vehicle height adjustment process, Step S220, controlling the compressor to raise the height of the vehicle body, and obtaining a first rising rate of the vehicle body.

[0124] The height of the vehicle body is raised solely by utilizing the compressor, thereby obtaining a first ascending rate.

[0125] Reference Fig.11 As shown, step S300, determining the rising fault threshold of the air suspension according to the rising rate, includes the following steps.

[0126] Step S310: obtaining a first rising fault threshold according to a first rising rate.

[0127] Since the gas tank does not participate in the above vehicle height adjustment process, the first rising rate can be considered as the lower limit of the vehicle height adjustment rate, and therefore the first rising rate can be used as the first rising fault threshold.

[0128] When the air suspension is working at the altitude corresponding to the preset altitude position, the first rising rate can be used as the first rising fault threshold of the air suspension at the altitude. When the vehicle is at the altitude corresponding to the preset altitude position, the height change rate during the vehicle height rising adjustment process is monitored, and if the height change rate is lower than the first rising fault threshold, it is determined that the vehicle height rises fault.

[0129] In some embodiments, reference Fig.10 As shown, step S200, controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body, also includes the following steps.

[0130] Step S230: When the air pressure of the air storage tank is greater than or equal to the seventh preset air pressure, the compressor is controlled to stop charging the air storage tank.

[0131] Before the air suspension raises the vehicle body height, the air pressure in the air tank is set to the seventh preset pressure to ensure that the air tank is at the maximum working pressure, so that the compressor and the air tank work together to adjust the height of the vehicle body.

[0132] Step S240, controlling the compressor and the air tank to raise the height of the vehicle body, and obtaining a second rising rate of the vehicle body.

[0133] The compressor and the air tank are used together to raise the height of the vehicle body, and then the second rising rate is obtained. Since the air tank is at the maximum working pressure, the second rising rate can be considered as the upper limit of the vehicle height adjustment rate. Therefore, the second rising rate can be used as the second rising fault threshold.

[0134] Reference Fig.11 As shown, step S300, determining the rising fault threshold of the air suspension according to the rising rate, includes the following steps.

[0135] Step S320: obtaining a second rising fault threshold according to the second rising rate.

[0136] When the air suspension is working at the altitude corresponding to the preset altitude position, the second rising rate can be used as the second rising fault threshold of the air suspension at the altitude. When the vehicle is at the altitude corresponding to the preset altitude position, the height change rate during the vehicle height rising adjustment process is monitored, and if the height change rate is lower than the second rising fault threshold, it is determined that the vehicle height rises fault.

[0137] Specifically, it can be divided into the following six specific implementation methods.

[0138] Working condition 1: Purpose: To trigger the altitude level control and test the vehicle body ascent speed when only the compressor is used to provide air source. To provide a basis for formulating the compressor pressure build-up fault monitoring threshold.

[0139] Vehicle status: The vehicle is loaded with the preset load and is stationary.

[0140] Test sampling points: 500m to 5000m above sea level, with testing conducted every 500m change in altitude.

[0141] Test method: Step 1: Adjust the air pressure of the air tank to below the starting threshold so that the vehicle height adjustment process only uses the compressor as the air source instead of the air tank or the boost mode as the air source.

[0142] Step 2: Trigger the vehicle height adjustment to make the air suspension system rise according to different adjacent vehicle height levels. During the adjustment process, monitor whether there is a fault trigger.

[0143] Step 3: After the adjustment is completed, adjust the vehicle height increase speed according to the test results.

[0144] Step 4: Set the vehicle height rise fault threshold according to the sorted vehicle height rise adjustment speed.

[0145] Working condition 2: Purpose: Repeatedly trigger the height adjustment from standard vehicle height to higher vehicle height, repeat 10 times, test the vehicle height adjustment speed. Test the system's height increase speed performance indicators.

[0146] Vehicle status: The vehicle is loaded with the preset load and is stationary. The initial air pressure of the gas tank is the maximum working pressure determined by the altitude. The gas tank is not refilled during the vehicle height adjustment process.

[0147] Test sampling points: 500m to 5000m above sea level, with testing conducted every 500m change in altitude.

[0148] Test method: Step 1: Adjust the air pressure in the gas tank to the maximum working pressure.

[0149] Step 2: Trigger the vehicle height adjustment, and make the air suspension system complete 10 height adjustments from the standard vehicle height to a higher vehicle height. During the adjustment process, monitor whether there is any fault triggering.

[0150] Step 3: After the adjustment is completed, adjust the vehicle height increase speed according to the test results.

[0151] Step 4: Set the vehicle height rise fault threshold according to the sorted vehicle height rise adjustment speed.

[0152] Working condition three: Purpose: To test the speed at which the compressor replenishes air to the air tank, with the air tank pressure ranging from 2.5 to 10 bar. To provide a basis for establishing the threshold for monitoring air tank failures.

[0153] Vehicle status: The vehicle is loaded with the preset load and is stationary.

[0154] Test sampling points: 500m to 5000m above sea level, with testing conducted every 500m change in altitude.

[0155] Test method: Step 1: Adjust the air pressure in the gas tank to 2.5 bar.

[0156] Step 2: Trigger the air tank to fill up until the air tank is filled to 10 bar. During the filling process, monitor whether there is any fault triggering.

[0157] Step 3: After the gas filling is completed, sort out the gas filling speed of the gas tank according to the test results.

[0158] Step 4: Set the gas tank refilling fault threshold according to the sorted gas tank refilling speed.

[0159] Working condition 4: Purpose: To test the speed at which the compressor replenishes air to the air tank, with the air tank pressure ranging from 10 bar to the maximum working pressure. This provides a basis for establishing the threshold for monitoring air tank failures.

[0160] Vehicle status: The vehicle is loaded with the preset load and is stationary.

[0161] Test sampling points: 500m to 5000m above sea level, with testing conducted every 500m change in altitude.

[0162] Test method: Step 1: Adjust the gas tank pressure to 10 bar.

[0163] Step 2: Trigger the air tank to fill up until the air tank is filled to the maximum working pressure. During the filling process, monitor whether there is any fault triggering.

[0164] Step 3: After the gas replenishment is completed, sort out the gas tank gas replenishment speed according to the test results.

[0165] Step 4: Set the gas tank refilling fault threshold according to the sorted gas tank refilling speed.

[0166] Working condition five: Purpose: To test the total working time of the compressor during the unit height adjustment cycle process, and provide a basis for analyzing the compressor's endurance life.

[0167] Vehicle status: The vehicle is loaded with the preset load, and the vehicle speed is set according to the speed threshold of the vehicle height adjustment strategy and the speed threshold of the air tank refilling strategy.

[0168] Test sampling points: 500m to 5000m above sea level, with testing conducted every 500m change in altitude.

[0169] Test method: Step 1: Adjust the vehicle height to the standard vehicle height and adjust the gas tank pressure to the maximum working pressure; Step 2: Trigger the vehicle height adjustment action, so that the air suspension system completes the following height adjustments: standard vehicle height, lower vehicle height, standard vehicle height, lower vehicle height, standard vehicle height, lower vehicle height, standard vehicle height, higher vehicle height, standard vehicle height, higher vehicle height, standard vehicle height, very high vehicle height, standard vehicle height. If the air tank refilling action occurs after each vehicle height adjustment, wait for the air tank refilling to be completed; monitor whether there is a fault trigger during the execution of the action.

[0170] Step 3: Trigger the air tank replenishment action to replenish the air in the air tank to the maximum working pressure; monitor whether there is a fault trigger during the execution of the action.

[0171] Step 4: After the test, sort out the total compressor working time according to the test results.

[0172] Step 5: The total working time of the compressor can be compared with the distance traveled by the vehicle, thereby evaluating whether the durability of the compressor meets the warranty mileage of the vehicle.

[0173] By obtaining the warranty mileage of the vehicle, the following relationship can be obtained: the ratio of the warranty mileage to the distance should be equal to the ratio of the life threshold to the total working time. The above relationship assumes that the air suspension of the vehicle is always in a state of adjusting the body height during the entire warranty mileage. The life threshold is calculated through the above relationship.

[0174] Then obtain the durable life of the compressor, and compare the life threshold with the durable life. Only when the durable life is greater than the life threshold can it be ensured that the compressor of the air suspension can operate normally within the warranty mileage.

[0175] Working condition six: Purpose: To test the working time of the compressor when the system is performing vehicle height maintenance adjustment. To provide a basis for analyzing the compressor's durability.

[0176] Vehicle status: The test vehicle is loaded in the empty state, design load and full load state through loading, and the vehicle is stationary.

[0177] Test sampling points: 500m to 5000m above sea level, with testing conducted every 500m change in altitude.

[0178] Test method: Step 1: Make the vehicle unloaded and adjust the vehicle height to a lower vehicle height. Adjust the air pressure in the air tank to below the start threshold so that the vehicle height adjustment process only uses the compressor as the air source, without using the air tank or the boost mode as the air source.

[0179] Step 2: Load the vehicle to the designed load, triggering the system vehicle height maintenance action. Then make the vehicle unloaded, and trigger the system vehicle height maintenance action again; monitor whether there is a fault trigger during the action execution.

[0180] Step 3: Make the vehicle fully loaded by loading, triggering the system vehicle height maintenance action. Then make the vehicle unloaded, and trigger the system vehicle height maintenance action again; monitor whether there is a fault trigger during the action execution.

[0181] Step 4: After the test is completed, the compressor working time during the vehicle height maintenance process is sorted out according to the test results.

[0182] Step 5: The total working time of the compressor can be correlated with the warranty mileage to evaluate whether the durability of the compressor meets the warranty mileage of the vehicle.

[0183] When the air suspension maintains the vehicle body at a preset height at the altitude corresponding to the preset altitude position, the total working time of the compressor can be used as the operating time of the compressor each time to maintain the vehicle body height at the altitude. Then, the vehicle manufacturer can use big data to retrieve the theoretical number of times the air suspension of the same type of vehicles maintains the vehicle body height within the warranty mileage. The theoretical working time can be obtained by multiplying the theoretical number of times by the total working time of the compressor. The theoretical working time is used as the life threshold of the compressor, and the durable life of the compressor is obtained. The life threshold is compared with the durable life. Only when the durable life is greater than the life threshold can it be ensured that the compressor of the air suspension can operate normally within the warranty mileage.

[0184] According to the above calibration method, the plateau calibration method of the air suspension system can be unified, making the test have good reproducibility. Through these standardized calibration tests, the thresholds for fault detection such as compressor pressure buildup failure, vehicle height rise failure, and air tank refill failure can be set based on the standard method. At the same time, the height adjustment performance of the air suspension system can be tested by standardized methods, and the working life of the compressor in plateau environments can be evaluated.

[0185] An embodiment of the present invention further provides a vehicle having an air suspension, wherein the air suspension is calibrated using the air suspension calibration method described in the above embodiment.

[0186] The air suspension of the vehicle is calibrated by the calibration method of the above embodiment, for example, executing the above described Figure 1 Steps S100 to S1000 of the method, Figure 2 Steps S610 to S630 of the method, Figure 3 Steps S611 to S615 of the method, Figure 4 Steps S810 to S820 of the method, Figure 5 Steps S821 to S823 of the method, Figure 6 Steps S410 to S420 of the method, Figure 7 Steps S430 to S440 of the method, Figure 8 Steps S500 to S520 of the method, Fig. 9 Steps S210 to S220 of the method, Fig.10 Steps S230 to S240 of the method, Fig.11 Method steps S300 to S320, etc.

[0187] Alternatively, an embodiment of the present invention further provides a controller, comprising: at least one processor; and a memory storing instructions, which, when executed by at least one processor, executes the air suspension calibration method of the above embodiment to calibrate the air suspension of the vehicle.

[0188] Take the example that the processor and memory in the controller can be connected through a bus. The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk memory, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the control processor, and these remote memories may be connected to the controller via a network.

[0189] The non-transient software program and instructions required to implement the calibration method of the above embodiment are stored in the memory. When executed by the processor, the calibration method of the above embodiment is executed, for example, the calibration method described above is executed. Figure 1 Steps S100 to S1000 of the method, Figure 2 Steps S610 to S630 of the method, Figure 3 Steps S611 to S615 of the method, Figure 4 Steps S810 to S820 of the method, Figure 5 Steps S821 to S823 of the method, Figure 6 Steps S410 to S420 of the method, Figure 7 Steps S430 to S440 of the method, Figure 8 Steps S500 to S520 of the method, Fig. 9 Steps S210 to S220 of the method, Fig.10 Steps S230 to S240 of the method, Fig.11 Method steps S300 to S320, etc.

[0190] The vehicle can be a private car, such as a sedan, SUV, MPV or pickup truck. The vehicle can also be an operating vehicle, such as a van, bus, small truck or large trailer. The vehicle can be a gasoline vehicle or a new energy vehicle. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0191] Since the vehicle adopts all the technical solutions of the vehicle controller of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0192] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A method for calibrating an air suspension, characterized in that: An air suspension for calibrating a vehicle, wherein the air suspension is connected to a body of the vehicle, the air suspension comprises a compressor and an air storage tank, and the air suspension calibration method comprises: moving the vehicle to a preset altitude; Controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body; determining a rising fault threshold of the air suspension according to the rising rate; Controlling the compressor to inflate the air storage tank and obtaining the air filling rate of the air storage tank; Determining a gas replenishment failure threshold of the gas storage tank according to the gas replenishment rate; Changing the load of the vehicle and controlling the compressor to maintain the vehicle body at a preset height, and obtaining a first working time of the compressor; predicting a first life threshold of the compressor according to the first working time; Controlling the vehicle to travel at a preset speed, controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle; predicting a second life threshold of the compressor according to the second working time and the distance; The rising fault threshold, the air supplement fault threshold, the first life threshold and the second life threshold are used as calibration parameters of the air suspension.

2. The air suspension calibration method according to claim 1, characterized in that: The changing the load of the vehicle and controlling the compressor to maintain the vehicle body at a preset height, and obtaining a first working time of the compressor, comprises: Changing the load multiple times so that the vehicle switches between an empty state, a designed load and a fully loaded state; After each change in the load weight, controlling the compressor to adjust the vehicle body back to the preset height, and obtaining a first operation time of each operation of the compressor; The first working time is calculated according to the sum of all the first operating time periods.

3. The air suspension calibration method according to claim 2, characterized in that: The method of changing the load multiple times so that the vehicle switches between an empty state, a designed load and a fully loaded state includes: configuring the vehicle to be in an unloaded state; adding a first counterweight to the vehicle to transform the vehicle into a design load; Removing the first counterweight to transform the vehicle into the no-load state; adding a second counterweight to the vehicle to convert the vehicle into a fully loaded state; Removing the second counterweight transforms the vehicle into the unloaded state.

4. The air suspension calibration method according to claim 1, characterized in that: The controlling the air suspension to adjust the height of the vehicle body and obtaining the second working time of the compressor and the distance traveled by the vehicle includes: When the air pressure of the air storage tank is greater than or equal to a first preset air pressure, controlling the compressor to stop inflating the air storage tank; The compressor and the gas storage tank are controlled to adjust the vehicle body so that the vehicle body switches among a first height, a second height, and a third height, wherein the second height is higher than the first height, and the third height is higher than the second height.

5. The air suspension calibration method according to claim 4, characterized in that: The controlling the compressor and the gas storage tank to adjust the vehicle body so that the vehicle body switches between the first height, the second height, and the third height includes: controlling the vehicle body to switch between the first height and the second height multiple times, and obtaining a second operating time of the compressor after each switching; controlling the vehicle body to switch between the second height and the third height multiple times, and obtaining a third operating time of the compressor after each switching; The obtaining of the second working time of the compressor and the distance traveled by the vehicle comprises: The second working time is calculated according to the sum of all the second operating time periods and all the third operating time periods.

6. The air suspension calibration method according to claim 1, characterized in that: The controlling the compressor to inflate the air storage tank and obtaining the air replenishment rate of the air storage tank comprises: After the air pressure of the air storage tank is adjusted to the second preset air pressure, controlling the compressor to increase the air pressure of the air storage tank to a third preset air pressure; Acquire a first filling rate of the gas storage tank; The step of determining the gas replenishment failure threshold of the gas storage tank according to the gas replenishment rate includes: A first inflation fault threshold is obtained according to the first inflation rate.

7. The air suspension calibration method according to claim 1, characterized in that: The controlling the compressor to inflate the air storage tank and obtaining the air replenishment rate of the air storage tank comprises: After the air pressure of the air storage tank is adjusted to a fourth preset air pressure, the compressor is controlled to increase the air pressure of the air storage tank to a fifth preset air pressure, and the compressor is controlled to stop inflating the air storage tank; Acquire a second filling rate of the gas storage tank; The step of determining the gas replenishment failure threshold of the gas storage tank according to the gas replenishment rate includes: A second gas replenishment fault threshold is obtained according to the second gas filling rate.

8. The air suspension calibration method according to claim 1, characterized in that: The controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body includes: When the gas pressure of the gas storage tank is less than or equal to a sixth preset gas pressure, controlling the gas storage tank to stop outputting gas to the outside; Controlling the compressor to raise the height of the vehicle body to obtain a first ascending rate of the vehicle body; The determining the rising fault threshold of the air suspension according to the rising rate includes: A first rising fault threshold is obtained according to the first rising rate.

9. The air suspension calibration method according to claim 1, characterized in that: The controlling the air suspension to raise the height of the vehicle body and obtaining the rising rate of the vehicle body includes: When the air pressure of the air storage tank is greater than or equal to a seventh preset air pressure, controlling the compressor to stop charging the air storage tank; Controlling the compressor and the gas storage tank to raise the height of the vehicle body, and obtaining a second ascending rate of the vehicle body; The determining the rising fault threshold of the air suspension according to the rising rate includes: A second rising fault threshold is obtained according to the second rising rate.

10. A vehicle, characterized in that: The vehicle has an air suspension, and the air suspension is calibrated using the air suspension calibration method according to any one of claims 1 to 9.

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