Air suspension system health monitoring method, system, and vehicle

Abstract

The application discloses an air suspension system health monitoring method and system and a vehicle, and relates to the technical field of air suspension systems, in particular to an air suspension system health monitoring method, system and vehicle. The method comprises the following steps: collecting functional signals affecting the opening of a gas storage tank valve and the starting of a compressor during the operation of an air suspension system; calculating the equivalent opening times of the gas storage tank valve according to the functional signals; calculating the equivalent working time of the compressor according to the functional signals; calculating the equivalent opening frequency of the gas storage tank valve according to the equivalent opening times of the gas storage tank valve; calculating the equivalent working proportion of the compressor according to the equivalent working time of the compressor; and judging the air leakage state of the air suspension system according to the equivalent opening frequency of the gas storage tank valve and the equivalent working proportion of the compressor. Through the establishment of a big data model algorithm, the processing and judgment of information, and the working conditions of the gas storage tank valve and the compressor, the health of the air leakage of the air suspension system is detected, and the problem that a vehicle cannot be detected in the micro-leakage and small-leakage stages of the air suspension system is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to an air suspension system health monitoring method, system and vehicle. Background Art

[0002] At present, air suspension systems are widely used in passenger cars. Because the entire system stores high-pressure gas (6~18bar) and there are many connection points in the system, the most common failure of the air suspension system during use is system leakage. Leakage is divided into four levels according to the performance of leakage, namely, micro leakage is not easy for users to detect and can basically be maintained by replenishing air from the air tank; small leakage is not easy for users to detect and can basically be maintained by replenishing air from the compressor; medium leakage is noticeable to users when they pay special attention, such as the car height drops significantly after parking for a period of time; large leakage is obviously noticeable to users, and the air tank and compressor can no longer maintain the car height, and the car body height is obviously abnormal. Moreover, the industry has no effective detection or monitoring measures for system leaks, especially minor leaks, and air suspension system leaks often expand from minor leaks to serious leaks. Therefore, if minor leaks are not repaired or replaced, it is very easy to cause instability to users' travel in the future (for example, suddenly one day the minor leak becomes a major leak, the suspension collapses, and the user cannot use it). In addition, due to minor leaks in the system, the air compressor in the air suspension system will be frequently started to replenish the air suspension system, which will greatly shorten the service life of the compressor and increase the after-sales maintenance and warranty costs of the OEM. Summary of the Invention

[0003] The present invention provides an air suspension system health monitoring method, system and vehicle, which can effectively detect the leakage status of the air suspension system and solve the problem that the vehicle cannot detect the micro-leakage and small leakage stages of the air suspension system.

[0004] According to a first aspect of an embodiment of the present invention, a method for monitoring the health of an air suspension system includes:

[0005] Collect functional signals that affect the opening of the air tank valve and the start of the compressor during the operation of the air suspension system;

[0006] Calculating the equivalent opening times of the gas tank valve according to the functional signal;

[0007] Calculating the equivalent working time of the compressor according to the functional signal;

[0008] The equivalent opening frequency of the gas tank valve is calculated according to the equivalent opening times of the gas tank valve;

[0009] Calculate the equivalent working ratio of the compressor according to the equivalent working time of the compressor;

[0010] determine the air suspension system leakage state according to the equivalent opening frequency of the tank valve and the equivalent working proportion of the compressor.

[0011] According to some embodiments of the present application, the function signals are weighted in the process of calculating the equivalent working time of the compressor and the equivalent opening times of the tank valve.

[0012] According to some embodiments of the present application, the function signals collected in the running of the air suspension system affecting the opening of the tank valve and the starting of the compressor include:

[0013] The signals of the opening times of the tank valve, the conversion times of the driving mode, the triggering times of the speed regulation, the triggering times of the loading mode, the times of the manual adjustment of the vehicle height, the times of the power-on of the whole vehicle, and the working time of the compressor are collected.

[0014] According to some embodiments of the present application, the calculation of the equivalent opening times of the tank valve according to the function signals includes:

[0015] The equivalent opening times of the tank valve are calculated according to the formula: equivalent opening times of the tank valve = opening times of the tank valve - conversion times of the driving mode x r1 - triggering times of the speed regulation x r2 - triggering times of the loading mode x r3 - times of the manual adjustment of the vehicle height x r4 - times of the power-on of the whole vehicle, wherein r1, r2, r3, and r4 are the time weight coefficients affecting the opening times of the tank valve.

[0016] According to some embodiments of the present application, the calculation of the equivalent opening frequency of the tank valve according to the equivalent opening times of the tank valve includes:

[0017] The equivalent opening frequency of the tank valve is calculated according to the formula: equivalent opening frequency of the tank valve = equivalent opening times of the tank valve / the power-on time of the whole vehicle in the set time.

[0018] According to some embodiments of the present application, the determination of the air suspension system leakage state according to the equivalent opening frequency of the tank valve and the equivalent working proportion of the compressor includes:

[0019] In the first preset time period, if the equivalent opening frequency of the tank valve presents data flat or continues to increase and is greater than the first preset threshold value, it is determined that the air suspension system is in a micro-leakage state.

[0020] According to some embodiments of the present application, the calculation of the equivalent working time of the compressor according to the function signals includes:

[0021] The equivalent working time of the compressor is calculated according to the formula: Compressor equivalent working time = Compressor working time - Number of driving mode conversions × t1 - Number of speed adjustment triggers × t2 - Number of loading mode triggers × t3 - Number of vehicle height manual adjustment times × t4, where t1, t2, t3 and t4 are time weight coefficients affecting the compressor working time.

[0022] According to some embodiments of the present invention, calculating the compressor equivalent working ratio based on the compressor equivalent working time includes:

[0023] The compressor equivalent working ratio is calculated according to the formula: compressor equivalent working ratio = compressor working time / vehicle power-on time within the set time.

[0024] According to some embodiments of the present invention, determining the air leakage state of the air suspension system based on the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor further includes:

[0025] If, within a second preset time period, the compressor equivalent work ratio remains flat or continues to increase and is greater than a second preset threshold, it is determined that the air suspension system is in a small leakage state.

[0026] According to some embodiments of the present invention, determining the air leakage state of the air suspension system based on the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor further includes:

[0027] Push air suspension system leakage warning information to the vehicle service monitoring center through the cloud.

[0028] According to a second aspect of an embodiment of the present invention, an air suspension system health monitoring system includes:

[0029] The acquisition module is configured to collect functional signals that affect the opening of the air tank valve and the start-up of the compressor during the operation of the air suspension system;

[0030] The control module is configured to calculate the equivalent number of times the air tank valve is opened based on the functional signal; calculate the equivalent working time of the compressor based on the functional signal; calculate the equivalent opening frequency of the air tank valve based on the equivalent number of times the air tank valve is opened; calculate the equivalent working proportion of the compressor based on the equivalent working time of the compressor; and determine the air leakage status of the air suspension system based on the equivalent opening frequency of the air tank valve and the equivalent working proportion of the compressor.

[0031] According to a third aspect of an embodiment of the present invention, a vehicle includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein the program implements the air suspension system health monitoring method when executed by the processor.

[0032] The air suspension system health monitoring method according to the embodiment of the present invention has at least the following beneficial effects:

[0033] The present invention calculates the equivalent number of openings of the air tank valve and the equivalent working time of the compressor based on various functional signals during the operation of the air suspension system, and obtains the equivalent opening frequency of the air tank valve and the equivalent working time of the compressor through calculation. Thereafter, the air leakage state of the air suspension system is judged according to the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor. Furthermore, the present invention establishes a big data model algorithm, combines the processing and judgment of information, and takes the working conditions of the air tank valve and the compressor as a basis to realize the health detection of air leakage of the air suspension system, thereby solving the problem that the vehicle cannot detect micro-leakage and small leakage of the air suspension system.

[0034] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0036] Figure 1 is a flow chart of the air suspension system health monitoring method of the present invention;

[0037] Figure 2 This is a flow chart of the present invention for monitoring air leakage of an air suspension system by the number of times the air tank valve is opened;

[0038] Figure 3 This is a flow chart of the present invention for monitoring air leakage of an air suspension system by operating a compressor. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship 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.

[0041] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting 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 based on the specific content of the technical solution.

[0043] In the related technology, the industry has no effective detection or monitoring measures for system leakage, especially minor leakage, and the leakage of the air suspension system often expands from minor leakage to serious leakage. Therefore, if it is not repaired or replaced when it is a minor leakage, it is very easy to cause instability to the user's travel in the future. In addition, due to micro-leakage and small leakage in the system, the air compressor in the air suspension system will be frequently started to replenish the air suspension system, which will greatly shorten the service life of the compressor. Therefore, it is currently difficult to judge the micro-leakage and small leakage of the air suspension system, and it is difficult to achieve effective detection of the health of the air suspension system.

[0044] Furthermore, the present invention provides a method for monitoring the health of an air suspension system, which combines information processing and judgment to realize health detection of air leakage in the air suspension system, solving the problem that the vehicle cannot detect micro-leakage and small leakage in the air suspension system.

[0045] Specifically: Figure 1 As shown, the air suspension system health monitoring method of the present invention includes the following steps:

[0046] Step S100: collecting functional signals that affect the opening of the air tank valve and the start-up of the compressor during the operation of the air suspension system;

[0047] Step S200: Calculating the equivalent opening times of the gas tank valve according to the function signal;

[0048] Step S300: Calculating the equivalent working time of the compressor according to the function signal;

[0049] Step S400: Calculating the equivalent opening frequency of the gas tank valve according to the equivalent opening times of the gas tank valve;

[0050] Step S500: Calculating the equivalent working ratio of the compressor according to the equivalent working time of the compressor;

[0051] Step S600: judging the air leakage state of the air suspension system according to the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor.

[0052] In step S100, the functional signals to be collected are: the number of times the gas tank valve is opened, the number of driving mode conversions, the number of speed-dependent adjustment triggering times, the number of loading mode triggering times, the number of vehicle height manual adjustment times, the number of vehicle power-on times, and the operating time of the compressor. This is because each driving mode conversion, speed-dependent adjustment, loading mode, vehicle height manual adjustment and vehicle power-on will trigger the operation of the gas tank valve, and the operation of the gas tank valve will also indirectly affect the start-up of the compressor. Therefore, this embodiment mainly collects the above-mentioned number of times the gas tank valve is opened, the number of driving mode conversions, the number of speed-dependent adjustment triggering times, the number of loading mode triggering times, the number of vehicle height manual adjustment times, the number of vehicle power-on times, and the operating time of the compressor.

[0053] Among them, the number of times the air tank valve is opened is the number of times the air tank valve is opened, the number of driving mode conversions is the number of times the vehicle switches between different driving modes, the number of speed adjustment triggers is the number of times the vehicle triggers the air suspension system to adjust at different speeds, the number of loading mode triggers is the number of times the vehicle triggers the air suspension system to adjust under different loading modes, and the number of manual vehicle height adjustments is the number of times the vehicle chassis height is adjusted, the number of vehicle power-on times is the number of times the vehicle is started and powered on, and the compressor working time is the time the compressor runs.

[0054] Taking into account that each driving mode conversion, speed adjustment, loading mode, manual vehicle height adjustment and vehicle power-on will trigger the gas tank valve to work, and the opening of the gas tank valve in this state is not caused by system leakage, it should be eliminated, and each driving mode conversion, speed adjustment, loading mode, manual vehicle height adjustment and vehicle power-on function triggering has a corresponding weight on the number of times the gas tank valve is opened.

[0055] In step S200, Figure 2 As shown, the equivalent number of times the gas tank valve is opened is calculated in this embodiment according to the formula: Equivalent number of times the gas tank valve is opened = Number of times the gas tank valve is opened - Number of driving mode conversions × r1 - Number of times the speed adjustment is triggered × r2 - Number of times the loading mode is triggered × r3 - Number of times the vehicle height is manually adjusted × r4 - Number of times the vehicle is powered on, to obtain the equivalent number of times the gas tank valve is opened, where r1, r2, r3, and r4 are the weight coefficients of the number of times the gas tank valve is opened.

[0056] Among them, the number of driving mode conversions × r1 is the number of times the vehicle triggers the opening of the gas tank valve when switching between different driving modes, the number of speed adjustment triggers × r2 is the number of times the vehicle triggers the opening of the gas tank valve at different vehicle speeds, the number of loading mode triggers × r3 is the number of times the vehicle triggers the opening of the gas tank valve under different loading modes, and the number of manual vehicle height adjustments × r4 is the number of times the gas tank valve is triggered to open when adjusting the vehicle chassis height.

[0057] Every driving mode change, speed adjustment, loading mode, and manual vehicle height adjustment will indirectly trigger the compressor to work. The compressor operation in this state is not caused by system leakage, so it must be eliminated. In addition, every driving mode change, speed adjustment, loading mode, and manual vehicle height adjustment function triggering has a corresponding weight on the compressor working time.

[0058] In step S300, Figure 3 As shown, for the calculation of the equivalent operating time of the compressor, this embodiment uses the formula: Compressor Equivalent Operating Time = Compressor Operating Time - Number of Driving Mode Conversions × t1 - Number of Speed ​​Adjustment Triggers × t2 - Number of Loading Mode Triggers × t3 - Number of Vehicle Height Manual Adjustments × t4 to calculate the equivalent operating time of the compressor, where t1, t2, t3, and t4 are time weight coefficients affecting the operating time of the compressor.

[0059] Among them, the number of driving mode conversions × t1 is the duration of time when the compressor is triggered when the vehicle switches between different driving modes, the number of speed adjustment triggers × t2 is the duration of time when the compressor is triggered at different vehicle speeds, the number of loading mode triggers × t3 is the duration of time when the compressor is triggered when the vehicle is in different loading modes, and the number of manual vehicle height adjustments × t4 is the duration of time when the compressor is triggered to work when adjusting the vehicle chassis height.

[0060] In step S400, the equivalent opening frequency of the gas tank valve is calculated according to the formula: equivalent opening frequency of the gas tank valve = equivalent number of openings of the gas tank valve / power-on duration of the vehicle within the set time, where the set time is one day. It can be understood that the equivalent opening frequency of the gas tank valve is the frequency of opening the gas tank valve during the power-on duration of the vehicle each day.

[0061] In step S500, the equivalent working ratio of the compressor is calculated according to the formula: compressor equivalent working ratio = compressor working time / vehicle power-on time within the set time, where the set time is also one day. It can be understood that the equivalent working ratio of the compressor is the working ratio of the compressor in the power-on time of the vehicle every day.

[0062] In step S600, after calculating and obtaining the equivalent opening frequency of the air reservoir valve and the equivalent operating ratio of the compressor, in this embodiment, if the equivalent opening frequency of the air reservoir valve remains constant or continuously increases and exceeds a first preset threshold within a first preset time period, it is determined that the air suspension system is in a slight leak state.

[0063] During the second preset time period, if the compressor equivalent working ratio remains flat or continues to increase and is greater than a second preset threshold, it is determined that the air suspension system is in a small leakage state.

[0064] Since the opening of the air tank valve can quickly detect whether there is any leakage in the air suspension system, and the compressor has a certain hysteresis, the monitoring of the equivalent opening frequency of the air tank valve can accurately determine whether the air suspension system is in a micro-leakage state, and the monitoring of the equivalent working ratio of the compressor can determine whether the air suspension system is in a small leakage state.

[0065] The first preset time period and the second preset time period can be set to the same time period. In this embodiment, they are both set to a continuous three-day time period. It can be understood that in this embodiment, whether the system is in a micro-leak state is determined by monitoring the equivalent opening frequency of the gas tank valve for three consecutive days, and whether the system is in a small leakage state is determined by monitoring the equivalent working ratio of the compressor for three consecutive days.

[0066] The setting of the first preset threshold and the second preset threshold is related to the algorithm and actuator performance, and is determined through a calibration process. In addition, by setting the threshold of the equivalent opening frequency of the gas tank valve and the threshold of the equivalent working ratio of the compressor, false alarms can be prevented.

[0067] After determining the leakage state of the air suspension system, the present invention also pushes air suspension system leakage warning information to the vehicle service monitoring center through the cloud.

[0068] The frequency weight coefficient is related to the algorithm and actuator performance, is determined through the calibration process, and is different for different vehicle models.

[0069] The collected functional signals are not limited to the above signals. If there are other functional signals in the air suspension system that affect the opening of the air tank valve and the start-up of the compressor, they also need to be added to the calculation formula of the equivalent opening times of the air tank valve and the equivalent working time of the compressor.

[0070] The present invention also provides an air suspension system health monitoring system, comprising: an acquisition module and a control module. The acquisition module is configured to collect functional signals that affect the opening of the air tank valve and the start-up of the compressor during the operation of the air suspension system; the control module is configured to calculate the equivalent opening times of the air tank valve based on the functional signals; calculate the equivalent operating time of the compressor based on the functional signals; calculate the equivalent opening frequency of the air tank valve based on the equivalent opening times of the air tank valve; calculate the equivalent operating ratio of the compressor based on the equivalent operating time of the compressor; and determine the air leakage status of the air suspension system based on the equivalent opening frequency of the air tank valve and the equivalent operating ratio of the compressor.

[0071] The present invention also provides a vehicle, comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein the program implements the above-mentioned air suspension system health monitoring method when executed by the processor.

[0072] The vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. It can also be a commercial vehicle, such as a van, bus, small truck, or large trailer. It 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.

[0073] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A method for monitoring the health of an air suspension system, characterized in that: include: Collect functional signals that affect the opening of the air tank valve and the start of the compressor during the operation of the air suspension system; Calculating the equivalent opening times of the gas tank valve according to the functional signal; Calculating the equivalent working time of the compressor according to the functional signal; The equivalent opening frequency of the gas tank valve is calculated according to the equivalent opening times of the gas tank valve; Calculate the equivalent working ratio of the compressor according to the equivalent working time of the compressor; Determining the air leakage state of the air suspension system according to the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor; The determining of the air leakage state of the air suspension system according to the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor includes: If, within a first preset time period, the equivalent opening frequency of the air tank valve remains constant or continues to increase and is greater than a first preset threshold, it is determined that the air suspension system is in a slight leakage state.

2. The air suspension system health monitoring method according to claim 1, characterized in that: In the process of calculating the equivalent working time of the compressor and the equivalent opening times of the gas tank valve, weight processing is performed on the functional signal.

3. The air suspension system health monitoring method according to claim 2, characterized in that: The function signal collected during the operation of the air suspension system that affects the opening of the air tank valve and the start-up of the compressor includes: Collect signals of the number of times the gas tank valve is opened, the number of times the driving mode is switched, the number of times the speed adjustment is triggered, the number of times the loading mode is triggered, the number of times the vehicle height is manually adjusted, the number of times the vehicle is powered on, and the operating time of the compressor.

4. The air suspension system health monitoring method according to claim 3, characterized in that: The calculation based on the functional signal to obtain the equivalent opening times of the gas tank valve includes: According to the formula: Equivalent number of times the gas tank valve is opened = Number of times the gas tank valve is opened - Number of driving mode conversions × r1 - Number of speed adjustment triggering times × r2 - Number of loading mode triggering times × r3 - Number of vehicle height manual adjustment times × r4 - Number of vehicle power-on times, the equivalent number of times the gas tank valve is opened is calculated, where r1, r2, r3 and r4 are the number weight coefficients that affect the number of times the gas tank valve is opened.

5. The air suspension system health monitoring method according to claim 4, characterized in that: The equivalent opening frequency of the gas storage tank valve is calculated based on the equivalent opening times of the gas storage tank valve, including: The equivalent opening frequency of the gas tank valve is calculated according to the formula: equivalent opening frequency of the gas tank valve = equivalent opening times of the gas tank valve / power-on time of the vehicle within the set time.

6. The air suspension system health monitoring method according to claim 3, characterized in that: The calculating according to the functional signal to obtain the equivalent working time of the compressor includes: The equivalent working time of the compressor is calculated according to the formula: Compressor equivalent working time = Compressor working time - Number of driving mode conversions × t1 - Number of speed adjustment triggers × t2 - Number of loading mode triggers × t3 - Number of vehicle height manual adjustment times × t4, where t1, t2, t3 and t4 are time weight coefficients affecting the compressor working time.

7. The air suspension system health monitoring method according to claim 6, characterized in that: The calculation of the compressor equivalent working ratio according to the compressor equivalent working time includes: The compressor equivalent working ratio is calculated according to the formula: compressor equivalent working ratio = compressor working time / vehicle power-on time within the set time.

8. The air suspension system health monitoring method according to claim 7, characterized in that: The determining of the air leakage state of the air suspension system according to the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor includes: During the second preset time period, if the compressor equivalent work ratio remains flat or continues to increase and is greater than a second preset threshold T, it is determined that the air suspension system is in a small leakage state.

9. The air suspension system health monitoring method according to claim 1, characterized in that: The determining of the air leakage state of the air suspension system according to the equivalent opening frequency of the air tank valve and the equivalent working ratio of the compressor includes: Push air suspension system leakage warning information to the vehicle service monitoring center through the cloud.

10. An air suspension system health monitoring system, characterized by: include: The acquisition module is configured to collect functional signals that affect the opening of the air tank valve and the start-up of the compressor during the operation of the air suspension system; The control module is configured to calculate the equivalent number of times the air tank valve is opened based on the functional signal; calculate the equivalent working time of the compressor based on the functional signal; calculate the equivalent opening frequency of the air tank valve based on the equivalent opening number of the air tank valve; calculate the equivalent working proportion of the compressor based on the equivalent working time of the compressor; and determine the air leakage status of the air suspension system based on the equivalent opening frequency of the air tank valve and the equivalent working proportion of the compressor.

11. A vehicle, characterized in that: The invention comprises a memory, a processor and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the method for monitoring the health of an air suspension system according to any one of claims 1 to 9 is implemented.

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