Noise reduction method and device of air suspension, storage medium and electronic device

Abstract

The invention provides a noise reduction method and device for an air suspension, a storage medium and an electronic device.The method comprises the steps that before a compressor of the air suspension of a vehicle is started, a control instruction for the air suspension is detected, and the initial load air pressure of the air suspension is obtained; according to the control instruction, the type of the working condition to be entered by the air suspension is determined; the working voltage with the optimal noise is searched for according to the initial load air pressure and the working condition type; and in the starting process of the compressor, the compressor is controlled to operate based on the working voltage. According to the embodiment, noise generated when the compressor of the vehicle air suspension works is reduced, noise interference in a vehicle is further reduced, the technical problem that in the related technology, noise is large when the vehicle air suspension works is solved, and the riding experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a noise reduction method and device of an air suspension, a storage medium and an electronic device. BACKGROUND

[0002] In the related art, as the application of air suspensions of vehicles is increasingly popular, consumers' cognition and requirements for air suspension systems are gradually increasing, and the requirements for the NVH (Noise, Vibration, Harshness) performance of air suspension systems are increasingly high. The working noise of an air suspension system is mainly the noise generated when the compressor is working, especially when the vehicle is stationary, without road noise and wind noise, this noise is more prominent and not easy to accept.

[0003] Because the noise frequency of the compressor is relatively wide, even if the traditional engineering optimization methods such as adding acoustic wrapping and secondary suspension vibration isolation are used for attenuation and isolation, the noise is still obvious in the vehicle, mainly in the form of low-frequency pressure, which makes people very uncomfortable. The traditional working logic and protection logic of the air suspension system are constant in voltage or current when the compressor starts, which makes it difficult to greatly improve and optimize the noise.

[0004] In view of the above problems in the related art, there is no efficient and accurate solution. SUMMARY

[0005] The present application provides a noise reduction method and device of an air suspension, a storage medium and an electronic device to solve the technical problems in the related art.

[0006] According to one embodiment of the present application, a noise reduction method of an air suspension is provided, comprising: detecting a control instruction for the air suspension and obtaining an initial load air pressure of the air suspension before starting a compressor of the air suspension of a vehicle; determining a working condition type to be entered by the air suspension according to the control instruction; looking up an optimal working voltage for noise according to the initial load air pressure and the working condition type; and controlling the compressor to operate based on the working voltage during the starting process of the compressor.

[0007] Optionally, determining the working condition type to be entered by the air suspension according to the control instruction comprises: analyzing a demand type of the control instruction; if the demand type is a demand for air supplement, determining that the working condition type to be entered by the air suspension is an air supplement condition; and if the demand type is a demand for height adjustment, determining that the working condition type to be entered by the air suspension is a height change condition.

[0008] Optionally, the searching for the working voltage optimal for noise according to the initial load air pressure and the working condition type comprises: if the working condition type is the air supplementing working condition, searching for a first working voltage most matched with the initial load air pressure in a first mapping table, wherein the first mapping table is used to store the working voltage optimal for noise when the air suspension is supplemented by the compressor under a plurality of groups of initial load air pressures.

[0009] Optionally, the searching for the working voltage optimal for noise according to the initial load air pressure and the working condition type comprises: if the working condition type is the height changing working condition, analyzing the target air suspension height after adjustment according to the control instruction, and collecting the initial air suspension height of the air suspension and the real-time wheel height of the vehicle; determining the height changing working condition of the air suspension according to the target air suspension height and the initial air suspension height, and determining the starting load air pressure of the compressor in the starting process according to the real-time wheel height and the initial load air pressure, wherein the height changing working condition is used to represent the height changing trend of the air suspension after starting; searching for a second working voltage most matched in a second mapping table according to the height changing working condition and the starting load air pressure, wherein the second mapping table is used to store the working voltage optimal for noise when the air suspension is height adjusted by the compressor under a plurality of groups of starting load air pressure states under a plurality of groups of height changing working conditions.

[0010] Optionally, the determining the starting load air pressure of the compressor in the starting process according to the real-time wheel height and the initial load air pressure comprises: determining the length changing amount of the air spring of the air suspension according to the vertical displacement amount of the real-time wheel height; converting the length changing amount into the air spring volume changing amount; and calculating the starting load air pressure of the air suspension in real time according to the air spring volume changing amount and the initial load air pressure.

[0011] Optionally, before the determining the starting load air pressure of the compressor in the starting process according to the real-time wheel height, the method further comprises: determining the equipment air supply type of the compressor, wherein the equipment air supply type comprises an open type compressor and a closed type compressor, the open type compressor is started only when the air suspension is raised, and the closed type compressor is started when the air suspension is raised and lowered; if the compressor is the open type compressor and the height changing working condition is raised, or the compressor is the closed type compressor, it is determined that the compressor will be started; if the compressor is the open type compressor and the height changing working condition is lowered, it is determined that the compressor will not be started.

[0012] Optionally, determining the height change working condition of the air suspension according to the target suspension height and the initial suspension height comprises: obtaining an in-vehicle mass load of the vehicle; searching for a load air pressure range matching the in-vehicle mass load; identifying an initial height working condition of the vehicle according to the initial load air pressure and the load air pressure range, and identifying a target height working condition of the vehicle according to the initial suspension height and the target suspension height; and determining the height change working condition of the air suspension according to the initial height working condition and the target height working condition.

[0013] According to another embodiment of the present application, a noise reduction device for an air suspension is provided, comprising: an obtaining module, configured to detect a control instruction for an air suspension of a vehicle before a compressor of the air suspension is started, and obtain an initial load air pressure of the air suspension; a determining module, configured to determine a working condition type to be entered by the air suspension according to the control instruction; a searching module, configured to search for a noise-optimal working voltage according to the initial load air pressure and the working condition type; and a control module, configured to control the compressor to operate based on the working voltage during the starting of the compressor.

[0014] Optionally, the determining module comprises: an analyzing unit, configured to analyze a demand type of the control instruction; a determining unit, configured to determine that the working condition type to be entered by the air suspension is a gas supplement working condition if the demand type is a gas supplement demand; and determine that the working condition type to be entered by the air suspension is a height change working condition if the demand type is a height adjustment demand.

[0015] Optionally, the searching module comprises: a first searching unit, configured to search for a first working voltage most matching the initial load air pressure in a first mapping table if the working condition type is the gas supplement working condition, wherein the first mapping table is configured to store working voltages optimal for noise when the compressor supplements the air suspension under a plurality of groups of initial load air pressures.

[0016] Optionally, the searching module comprises: a processing unit, configured to, if the working condition type is a height change working condition, parse the target suspension height of the air suspension after adjustment according to the control instruction, and collect the initial suspension height of the air suspension and the real-time wheel height of the vehicle; a first determining unit, configured to determine the height change working condition of the air suspension according to the target suspension height and the initial suspension height, and determine the starting load air pressure of the compressor in the starting process according to the real-time wheel height and the initial load air pressure, wherein the height change working condition is used to represent the height change trend of the air suspension after starting; and a second searching unit, configured to search for the most matched second working voltage in a second mapping table according to the height change working condition and the starting load air pressure, wherein the second mapping table is used to store the working voltage that is optimal for noise when the air suspension is adjusted in height by the compressor under a plurality of groups of starting load air pressure states in a plurality of groups of height change working conditions.

[0017] Optionally, the first determining unit comprises: a determining sub-unit, configured to determine the length change amount of the air spring of the air suspension according to the vertical displacement amount of the real-time wheel height; a conversion sub-unit, configured to convert the length change amount into an air spring volume change amount; and a calculation sub-unit, configured to calculate the starting load air pressure of the air suspension in real time according to the air spring volume change amount and the initial load air pressure.

[0018] Optionally, the searching module further comprises: a second determining unit, configured to determine the device air supply type of the compressor before the first determining unit determines the starting load air pressure of the compressor in the starting process according to the real-time wheel height, wherein the device air supply type comprises an open-type compressor and a closed-type compressor, the open-type compressor is started only when the air suspension is raised, and the closed-type compressor is started when the air suspension is raised and lowered; and a third determining unit, configured to determine that the compressor will be started if the compressor is the open-type compressor and the height change working condition is raised, or the compressor is the closed-type compressor, and determine that the compressor will not be started if the compressor is the open-type compressor and the height change working condition is lowered.

[0019] Optionally, the first determining unit comprises: an acquisition sub-unit, configured to acquire the in-vehicle mass load of the vehicle; a searching sub-unit, configured to search for a load air pressure range matched with the in-vehicle mass load; an identification sub-unit, configured to identify the initial height working condition of the vehicle according to the initial load air pressure and the load air pressure range, and identify the target height working condition of the vehicle according to the initial suspension height and the target suspension height; and a determining sub-unit, configured to determine the height change working condition of the air suspension according to the initial height working condition and the target height working condition.

[0020] According to another aspect of the embodiments of the present application, a storage medium is also provided, which includes a stored program, and the program performs the steps described above when executed.

[0021] According to another aspect of the embodiments of the present application, an electronic device is also provided, which includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete the communication among each other through the communication bus; and the memory is configured to store a computer program; and the processor is configured to execute the steps in the above method by running the program stored in the memory.

[0022] The embodiments of the present application also provide a computer program product including instructions, which, when executed on a computer, cause the computer to perform the steps in the above method.

[0023] The beneficial effects of the present application are as follows:

[0024] 1. The noise generated by the compressor of the air suspension of the vehicle is reduced, and thus the noise interference in the vehicle is reduced, the technical problem of large noise of the air suspension of the vehicle in the related art is solved, and the user's riding experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate the illustrative embodiments of the application and the explanation of the application, and do not constitute an improper limitation of the application. In the drawings:

[0026] Figure 1 is a hardware structure block diagram of a vehicle according to an embodiment of the present application;

[0027] Figure 2 is a flowchart of a noise reduction method of an air suspension according to an embodiment of the present application;

[0028] Figure 3 is a working noise control principle diagram of an air suspension in an embodiment of the present application;

[0029] Figure 4 is a structure block diagram of a noise reduction device of an air suspension according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0032] Embodiment 1

[0033] The method embodiments provided by the embodiment of the present application can be executed in a car, a car suspension, an air suspension or similar processing devices. Taking the running on a car as an example, Figure 1 is a hardware structure block diagram of a car of an embodiment of the present application. As shown in Figure 1 , the car can include one or more (only one is shown in Figure 1 ) processor 102 (the processor 102 can include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above-mentioned car can also include a transmission device 106 for communication function and an input and output device 108. Those skilled in the art can understand that Figure 1 The structure shown is only schematic, which does not limit the structure of the above-mentioned car. For example, the car can also include more or less components than Figure 1 shown, or have a different configuration from Figure 1 shown.

[0034] The memory 104 can be used to store the vehicle program, such as the software program of the application software and the module, for example, the vehicle program corresponding to the noise reduction method of the air suspension of a vehicle in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the vehicle program stored in the memory 104, that is, implements the above-mentioned method. The memory 104 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include a memory remotely arranged with respect to the processor 102, and these remote memories can be connected to the vehicle through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0035] The transmission device 106 is used to receive or send data via a network. The specific examples of the above-mentioned network can include a wireless network provided by a communication provider of the vehicle. In one example, the transmission device 106 includes a network adapter (NIC) which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module which is used to communicate with the Internet in a wireless manner.

[0036] In the embodiment, a noise reduction method of an air suspension is provided, Figure 2 is a flow chart of the noise reduction method of the air suspension according to the embodiment of the present application, as shown in Figure 2 The flow chart includes the following steps:

[0037] In step S201, before starting the compressor of the air suspension of the vehicle, a control instruction for the air suspension is detected, and an initial load air pressure of the air suspension is obtained.

[0038] Optionally, the air chamber of the air suspension includes an air tank and an air spring, and the initial load air pressure of the air suspension includes an initial load air pressure of the air tank and an initial load air pressure of the air spring.

[0039] In step S202, the type of working condition to be entered by the air suspension is determined according to the control instruction.

[0040] Optionally, the type of working condition includes a gas supplementing working condition (supplementing gas to the air tank of the air suspension) and a height changing working condition (adjusting the height of the air spring (air spring) of the air suspension).

[0041] In step S203, the working voltage with the optimal noise is searched according to the initial load air pressure and the type of working condition.

[0042] The noise-optimal working voltage of the embodiment is the working voltage with the minimum sound pressure level, better sound quality and the optimal comprehensive evaluation of the noise in the whole working process.

[0043] In step S204, the working voltage is used to control the compressor during the starting process of the compressor.

[0044] The power management of the compressor receives the input signal of the noise-optimal working voltage at the starting moment of the compressor, and the power management outputs the noise-optimal working voltage, and the compressor operates.

[0045] According to the control instruction, the type of the working condition to be entered by the air suspension is determined; and according to the initial load air pressure and the type of the working condition, the noise-optimal working voltage is searched. During the starting process of the compressor, the working voltage is used to control the operation of the compressor. The noise-optimal working voltage at the starting moment of the air suspension is searched according to the initial load air pressure and the type of the working condition, and then the working voltage of the compressor of the air suspension is controlled, so that the noise generated by the compressor of the air suspension of the vehicle is reduced, the noise interference in the vehicle is reduced, the technical problem of large noise generated by the air suspension of the vehicle in the related art is solved, and the user experience of riding is improved.

[0046] In one embodiment of the embodiment, according to the control instruction, the type of the working condition to be entered by the air suspension includes: analyzing the demand type of the control instruction; if the demand type is air supplement demand, it is determined that the type of the working condition to be entered by the air suspension is air supplement working condition; and if the demand type is height adjustment demand, it is determined that the type of the working condition to be entered by the air suspension is height change working condition.

[0047] The type of the working condition of the control instruction input by the controller is received, and it is judged whether the system air supplement demand or the system height adjustment demand. Because the starting demand of the compressor has air suspension system air supplement and system height adjustment, the system air supplement is air charging from the atmosphere to the air tank, and the height adjustment can be divided into two kinds of height increase and height decrease. The type of the working condition to be entered by the air suspension is determined, and the subsequent control action is executed.

[0048] In one implementation scenario, according to the initial load air pressure and the type of the working condition, the noise-optimal working voltage is searched, including: if the type of the working condition is air supplement working condition, a first working voltage most matched with the initial load air pressure (the initial load air pressure in the air tank) is searched in a first mapping table, wherein the first mapping table is used to store the noise-optimal working voltage of the compressor when air supplement is performed on the air suspension under a plurality of groups of initial load air pressures.

[0049] Optionally, the working voltage can be a constant value or a voltage curve (dynamic voltage varying with air supplement time). As the air supplement time increases, the real-time load air pressure in the air suspension gas tank also increases, and the corresponding noise-optimal working voltage also changes.

[0050] In another implementation scenario, the searching for the noise-optimal working voltage according to the initial load air pressure and the working condition type includes: if the working condition type is a height change working condition, resolving the target suspension height of the air suspension according to the control instruction, and collecting the initial suspension height of the air suspension and the real-time wheel height of the vehicle; determining the height change working condition of the air suspension according to the target suspension height and the initial suspension height, and determining the starting load air pressure (load air pressure in the air spring) of the compressor in the starting process according to the real-time wheel height and the initial load air pressure, wherein the height change working condition is used to represent the height change trend of the air suspension after starting; searching for the second working voltage that is the most matched in a second mapping table according to the height change working condition and the starting load air pressure, wherein the second mapping table is used to store the noise-optimal working voltage of the air suspension when the height of the air suspension is adjusted under a plurality of starting load air pressure states of the compressor under a plurality of height change working conditions.

[0051] The height mode of the target suspension height and the initial suspension height can be set to 3 and 5. If the height mode is divided into 3, it is divided into high, medium and low; if it is divided into 5, it is very high, relatively high, medium, relatively low and extremely low, and the actual setting defined by the air suspension function of the specific vehicle type is used as the criterion; the height change working condition is the change trend when the two height modes are switched.

[0052] The required target suspension height is the adjusted suspension height, which is suitable for the height adjustment requirement execution, and if it is an air supplement requirement, it is not necessary to read. The pressure sensor data is read to obtain the initial load air pressure of the air spring and the gas tank, the wheel height sensor data is read to obtain the height difference of the compressor in the starting process, and the air spring volume change is calculated. According to the read information, the starting time of the compressor and the load air pressure of the compressor at the halfway starting time are calculated. In combination with the air pressure measurement table of the air spring and the gas tank under different vehicle loads in each height mode, the noise-optimal working voltage evaluation table corresponding to different initial load air pressures of the compressor starting under the height mode change working condition of each height mode is evaluated, and the noise-optimal working voltage is supplied to the power supply strategy calibration on the power management.

[0053] In the embodiment, according to the control strategy of the air suspension, the compressor includes multiple device air supply types, and before determining the starting load air pressure of the compressor in the starting process according to the real-time wheel height, the device air supply type of the compressor is further determined, wherein the device air supply type includes an open compressor and a closed compressor, the open compressor is started only when the air suspension is raised, and the closed compressor is started when the air suspension is raised and lowered; if the compressor is the open compressor and the height change condition is raised, or the compressor is the closed compressor, it is determined that the compressor will be started; if the compressor is the open compressor and the height change condition is lowered, it is determined that the compressor will not be started.

[0054] The compressor of the embodiment has two working modes of full starting and mid-process starting. In the height adjustment strategy, the strategy of the open air supply system of the open compressor is to adjust the compressor to start alone or to start together with the gas storage tank according to different valve values of the actual pressure of the gas storage tank when adjusting from a low mode to a high mode, but the compressor will not start when adjusting from the high mode to the low mode, and only the exhaust valve is opened to exhaust the gas to the atmosphere. However, for the closed air supply system of the closed compressor, the compressor transports the gas between the air spring and the gas storage tank. One strategy is that the compressor is started throughout the adjustment process, and another strategy is to preferentially use the pressure difference between the gas storage tank and the air spring to adjust, so that the compressor is not started throughout the adjustment process. When the pressure difference is insufficient, the compressor is started in the process.

[0055] Based on the logic of preferentially using the pressure difference to adjust the height, in a certain height mode change condition, the starting time of the compressor is determined by reading the air pressure values of the air spring and the gas storage tank and according to the calibration strategy of the software logic, and the load air pressure of the compressor at the starting time is calculated according to the change of the volume of the air spring.

[0056] In one example, determining the starting load air pressure of the compressor in the starting process according to the real-time wheel height and the initial load air pressure includes: determining the length change amount of the air spring of the air suspension according to the vertical displacement amount of the real-time wheel height; converting the length change amount into the volume change amount of the air spring; and calculating the starting load air pressure of the air suspension in real time according to the volume change amount of the air spring and the initial load air pressure.

[0057] In this example, the wheel height sensor signal is the measured vertical displacement of the wheel center point relative to the vehicle body, which can reflect the change in suspension travel. Combined with the suspension kinematics model, it can be converted into the distance change between the air spring mounting points, which can reflect the physical length change of the air spring. Combined with the piston section and air bag shape in the air spring, the "air spring volume-travel characteristic curve" can be obtained, which represents the volume of the air spring at each suspension travel. By fitting a function relationship through this curve, the volume change AV is obtained, and then by applying the ideal gas state equation (gas density is known, gas chamber size is known), the air pressure value of the starting load air spring can be obtained.

[0058] Alternatively, a pressure sensor can also be provided in the air spring to monitor the starting load air pressure of the compressor during startup.

[0059] In this embodiment, determining the height change condition of the air suspension according to the target suspension height and the initial suspension height includes: obtaining the in-vehicle mass load of the vehicle; finding a load air pressure range matching the in-vehicle mass load; identifying the initial height condition of the vehicle according to the initial load air pressure and the load air pressure range, and identifying the target height condition of the vehicle according to the initial suspension height and the target suspension height; and determining the height change condition of the air suspension according to the initial height condition and the target height condition.

[0060] Alternatively, the height condition (height mode) of this embodiment can be high, medium, and low, and based on different combinations of the initial height condition and the target height condition, the height change condition can be low to medium, low to high, medium to high, high to medium, high to low, medium to low, etc. Finding a load air pressure range matching the in-vehicle mass load includes: determining the load type to which the in-vehicle mass load belongs, wherein the load type includes full load (only one driver in the vehicle), half load, and full load; and finding a load air pressure range matching the load type. The load air pressure range includes multiple sub-ranges, each corresponding to a height condition.

[0061] At different height modes, the air pressure value in the air spring will change with the mass load of the in-vehicle personnel or cargo. By measuring the air pressure values of the air spring and the air tank under different in-vehicle mass loads (such as full load, half load, and full load) and mass distribution, the load air pressure range under different loads at this height mode is obtained, and this load air pressure range is used as the air pressure range for evaluating the optimal working voltage of the noise, for example: the load air pressure (unit: bar) ranges of full load, half load, and full load are 7.4-8.4, 8.4-9.6, and 9.6-10.5, respectively. If the initial load air pressure is 8.4, when the in-vehicle mass load is full load, the initial height condition is high, and if the initial load air pressure is 8.4, when the in-vehicle mass load is half load, the initial height condition is low.

[0062] The embodiment provides a control method for optimizing working noise of an air suspension system, and the method is realized by adding a calibration and output of different compressor working voltages to a compressor power supply strategy through air suspension power management. Before starting of the compressor, the working voltage calibration strategy obtained by combining test data is used to adjust the working voltage in advance to the working voltage most favorable to NVH performance under the current working mode and load air pressure after calculation and evaluation of the compressor starting demand and vehicle sensor information. The sound pressure level and sound quality of the working noise of the compressor are greatly improved.

[0063] Figure 3 It is a working noise control principle diagram of the air suspension in the embodiment, and the method for optimizing working noise by adding a calibration to the compressor power supply strategy to the power management, and the method comprises the following steps: receiving a demand mode input by a controller, and judging whether it is a system air supplement demand or a system height adjustment demand; reading a current vehicle height mode, a target height mode of the demand, wheel height sensor data and initial load air pressure of the air spring and the gas tank; calculating the compressor starting time and the load air pressure at the compressor starting time according to the read information; combining the measured air pressure table of the air spring and the gas tank under different vehicle loads in each height mode to evaluate the noise optimal working voltage evaluation table corresponding to different initial load air pressures at the compressor starting time under the height mode change working condition, and calibrate the noise optimal working voltage supply strategy to the power management; sending the height mode change working condition, the compressor starting time and the load air pressure to the power management for matching; receiving the input signals of the compressor starting time and the noise optimal working voltage by the power management; outputting the noise optimal working voltage by the power supply, and starting the compressor.

[0064] The working noise of the compressor of the air suspension mainly includes the sound pressure level and the sound quality. The sound pressure level mainly corresponds to the reference spectrum and the loudness, and the sound quality is more inclined to correspond to the subjective feelings such as the reference tone, the timbre and the stability. When the compressor runs stably, excluding the interference noise such as the button in the vehicle in the first few seconds, the sound pressure level shows an increasing trend with the increase of the load air pressure, but the overall change is not large. The different initial load air pressures at the compressor starting time also have an influence on the sound quality. Therefore, the working noise optimization strategy mainly optimizes the sound pressure level of the stable running of the compressor, and considers the sound quality performance, and calibrates the working voltage with the optimal noise comprehensive evaluation in the whole working process. The sound pressure level amplitude of the compressor under different working voltages gradually decreases, and the noise performance of the low-frequency ear problem is obviously improved. Therefore, the working noise performance can be greatly improved by identifying the adjustment demand, collecting and calculating the load air pressure at the compressor starting time, and starting the compressor with the noise optimal working voltage corresponding to the load air pressure.

[0065] The control adjustment strategy method is to identify the control instruction of the controller when the compressor starts, read the current suspension height, the target suspension height required, the wheel height sensor data, the initial load air pressure of the air spring and the gas tank, obtain the height mode change working condition, and calculate the compressor starting time and the load air pressure when the compressor starts. The power management is calibrated for the power strategy under different load air pressures in different height mode changes and air supplement working conditions according to the test data and evaluation calibration conclusion of the noise optimal working voltage under different load air pressures. The compressor starting time and the load air pressure are sent to the power management, and the power management outputs according to the noise optimal working voltage calibration strategy, so that the noise level is optimal when the compressor starts.

[0066] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be realized by means of software and necessary general hardware platform, and of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes a plurality of instructions for making a terminal device (which can be a mobile phone, computer, server, or network device) execute the method described in each embodiment of the present application.

[0067] Embodiment 2

[0068] In this embodiment, a noise reduction device for an air suspension is also provided, which is used to implement the above embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and contemplated.

[0069] Figure 4 is a structural block diagram of a noise reduction device for an air suspension according to an embodiment of the present application, as shown in Figure 4 The device comprises:

[0070] The acquisition module 41 is configured to detect a control instruction for an air suspension of a vehicle and acquire an initial load air pressure of the air suspension before a compressor of the air suspension starts.

[0071] The determination module 42 is configured to determine a working condition type to be entered by the air suspension according to the control instruction.

[0072] The lookup module 43 is configured to look up a noise-optimal working voltage according to the initial load air pressure and the working condition type.

[0073] The control module 44 is configured to control the compressor to operate based on the working voltage during a starting process of the compressor.

[0074] Optionally, the determination module comprises: an analysis unit, configured to analyze a demand type of the control instruction; and a determination unit, configured to determine that the working condition type to be entered by the air suspension is a gas supplement working condition if the demand type is a gas supplement demand; and determine that the working condition type to be entered by the air suspension is a height change working condition if the demand type is a height adjustment demand.

[0075] Optionally, the searching module comprises: a first searching unit, configured to search, in a first mapping table, a first working voltage that is most matched with the initial load air pressure if the working condition type is the gas supplement working condition, wherein the first mapping table is configured to store a working voltage that is optimal for noise when the compressor supplements the air suspension under a plurality of groups of initial load air pressures.

[0076] Optionally, the searching module comprises: a processing unit, configured to, if the working condition type is the height change working condition, analyze the air suspension at an adjusted target suspension height according to the control instruction, and collect an initial suspension height of the air suspension and a real-time wheel height of the vehicle; a first determination unit, configured to determine a height change working condition of the air suspension according to the target suspension height and the initial suspension height, and determine a starting load air pressure of the compressor in the starting process according to the real-time wheel height and the initial load air pressure, wherein the height change working condition is configured to represent a height change trend of the air suspension after starting; and a second searching unit, configured to search, in a second mapping table, a second working voltage that is most matched with the height change working condition and the starting load air pressure, wherein the second mapping table is configured to store a working voltage that is optimal for noise when the compressor adjusts the height of the air suspension under a plurality of groups of height change working conditions and a plurality of groups of starting load air pressures.

[0077] Optionally, the first determination unit comprises: a determination sub-unit, configured to determine a length change amount of an air spring of the air suspension according to a vertical displacement amount of the real-time wheel height; a conversion sub-unit, configured to convert the length change amount into an air spring volume change amount; and a calculation sub-unit, configured to calculate the starting load air pressure of the air suspension in real time according to the air spring volume change amount and the initial load air pressure.

[0078] Optionally, the searching module further comprises: a second determining unit, configured to determine a device air supply type of the compressor before the first determining unit determines the starting load air pressure of the compressor in the starting process according to the real-time wheel height, wherein the device air supply type comprises an open-type compressor and a closed-type compressor, the open-type compressor is started only when the air suspension is raised, and the closed-type compressor is started when the air suspension is raised or lowered; and a third determining unit, configured to determine that the compressor will be started if the compressor is the open-type compressor and the height change condition is raised, or the compressor is the closed-type compressor; and determine that the compressor will not be started if the compressor is the open-type compressor and the height change condition is lowered.

[0079] Optionally, the first determining unit comprises: an obtaining sub-unit, configured to obtain an in-vehicle mass load of the vehicle; a searching sub-unit, configured to search for a load air pressure range matched with the in-vehicle mass load; an identifying sub-unit, configured to identify an initial height condition of the vehicle according to the initial load air pressure and the load air pressure range, and identify a target height condition of the vehicle according to the initial suspension height and the target suspension height; and a determining sub-unit, configured to determine a height change condition of the air suspension according to the initial height condition and the target height condition.

[0080] It should be noted that the above various modules can be implemented by software or hardware, and for the latter, the following implementation manners can be used, but are not limited thereto: all the above modules are located in the same processor; or the above various modules are located in different processors in any combination.

[0081] Embodiment 3

[0082] The embodiments of the present application also provide a storage medium, which stores a computer program, and the computer program is arranged to execute the steps in any of the above method embodiments when running.

[0083] Optionally, in the present embodiment, the above storage medium can be arranged to store a computer program for executing the following steps:

[0084] S1, before a compressor of an air suspension of a vehicle is started, detecting a control instruction for the air suspension, and obtaining an initial load air pressure of the air suspension;

[0085] S2, determining a working condition type to be entered by the air suspension according to the control instruction;

[0086] S3, searching for a noise-optimal working voltage according to the initial load air pressure and the working condition type;

[0087] S4, during the starting process of the compressor, controlling the compressor to run based on the working voltage.

[0088] Optionally, in the embodiment, the storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various storage media that can store computer programs.

[0089] The embodiment of the application further provides an electronic device including a memory and a processor, the memory stores a computer program, and the processor is configured to execute the computer program to perform the steps in any of the method embodiments.

[0090] Optionally, the electronic device can further include a transmission device and an input / output device, wherein the transmission device is connected with the processor, and the input / output device is connected with the processor.

[0091] Optionally, in the embodiment, the processor can be configured to perform the following steps through the computer program:

[0092] S1, before starting a compressor of an air suspension of a vehicle, detecting a control instruction for the air suspension, and acquiring an initial load air pressure of the air suspension;

[0093] S2, determining a working condition type to be entered by the air suspension according to the control instruction;

[0094] S3, searching for a noise-optimal working voltage according to the initial load air pressure and the working condition type;

[0095] S4, during the starting process of the compressor, controlling the compressor to run based on the working voltage.

[0096] Optionally, specific examples in the embodiment can refer to the examples described in the above embodiments and optional implementation manners, and the embodiment will not be described here again.

[0097] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the modules can be selected to achieve the purpose of the embodiment.

[0098] Those skilled in the art can clearly understand the implementation of the embodiments by the description of the above embodiments. The embodiments can be implemented by means of software plus a general hardware platform, and of course, can also be implemented by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, and the computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0099] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically indicated as such. It is also to be understood that additional or alternative steps can be employed.

[0100] The above description is merely that of specific embodiments of the present application, and thus is not intended to limit the present application. From the above description, one skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A noise reduction method for an air suspension, characterized in that: include: Before a compressor of an air suspension of a vehicle is started, detecting a control instruction for the air suspension and obtaining an initial load air pressure of the air suspension; determining a type of operating condition to be entered by the air suspension according to the control instruction; Finding an operating voltage with optimal noise according to the initial load gas pressure and the operating condition type; During the startup of the compressor, the operation of the compressor is controlled based on the operating voltage.

2. The method according to claim 1, characterized in that Determining the type of operating condition to be entered by the air suspension according to the control instruction includes: Analyzing the requirement type of the control instruction; If the demand type is an air supply demand, it is determined that the operating condition type to be entered by the air suspension is an air supply condition; if the demand type is a height adjustment demand, it is determined that the operating condition type to be entered by the air suspension is a height change condition.

3. The method according to claim 1, characterized in that Finding the noise-optimized operating voltage according to the initial load gas pressure and the operating condition type includes: If the operating condition type is an air supply operating condition, a first operating voltage that best matches the initial load air pressure is searched in a first mapping table, wherein the first mapping table is used to store the operating voltage with optimal noise when the compressor supplies air to the air suspension under multiple sets of initial load air pressures.

4. The method according to claim 1, wherein Finding the noise-optimized operating voltage according to the initial load gas pressure and the operating condition type includes: If the operating condition type is a height change operating condition, analyzing the target suspension height of the air suspension after adjustment according to the control instruction, and collecting the initial suspension height of the air suspension and the real-time wheel height of the vehicle; determining a height variation operating condition of the air suspension according to the target suspension height and the initial suspension height, and determining a starting load pressure of the compressor during startup according to the real-time wheel height and the initial load pressure, wherein the height variation operating condition is used to characterize a height variation trend of the air suspension after startup; The best-matching second operating voltage is searched for in a second mapping table according to the height change operating condition and the starting load air pressure, wherein the second mapping table is used to store the operating voltage with optimal noise when the compressor adjusts the height of the air suspension under multiple sets of height change operating conditions and multiple sets of starting load air pressure states.

5. The method according to claim 4, characterized in that Determining the starting load air pressure of the compressor during the starting process according to the real-time wheel height and the initial load air pressure includes: determining a length change of an air spring of the air suspension according to the vertical displacement of the real-time wheel height; Converting the length change into an empty spring volume change; The starting load pressure of the air suspension is calculated in real time according to the change in the empty spring volume and the initial load pressure.

6. The method according to claim 4, characterized in that Before determining the starting load air pressure of the compressor during the starting process according to the real-time wheel height, the method further includes: Determining an equipment air supply type of the compressor, wherein the equipment air supply type includes an open compressor and a closed compressor, the open compressor being activated only when the air suspension is raised, and the closed compressor being activated both when the air suspension is raised and lowered; If the compressor is an open compressor and the altitude change condition is increasing, or the compressor is a closed compressor, it is determined that the compressor will start; if the compressor is an open compressor and the altitude change condition is decreasing, it is determined that the compressor will not start.

7. The method according to claim 4, characterized in that Determining the height change condition of the air suspension according to the target suspension height and the initial suspension height includes: Obtaining the vehicle's internal mass load; Finding a load air pressure range that matches the mass load in the vehicle; identifying an initial height condition of the vehicle based on the initial load air pressure and the load air pressure range, and identifying a target height condition of the vehicle based on the initial suspension height and a target suspension height; A height change operating condition of the air suspension is determined according to the initial height operating condition and the target height operating condition.

8. A noise reduction device for an air suspension, characterized in that: include: an acquisition module, configured to detect a control instruction for the air suspension and acquire an initial load air pressure of the air suspension before a compressor of the air suspension of the vehicle is started; a determination module, configured to determine a type of operating condition to be entered by the air suspension according to the control instruction; A search module, configured to search for an operating voltage with optimal noise according to the initial load gas pressure and the operating condition type; A control module is used to control the operation of the compressor based on the working voltage during the startup of the compressor.

9. A storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the method according to any one of claims 1 to 7 when executed.

10. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to perform the method according to any one of claims 1 to 7.

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