Active suspension air supply system drying capacity control method and active suspension air supply system

Abstract

The invention discloses an active suspension air supply system drying capacity control method and an active suspension air supply system. The active suspension air supply system drying capacity control method comprises the steps that system humidity and parameters related to noise are obtained; judging whether the conditions that the system humidity is greater than a preset first humidity threshold value and the parameters related to the noise meet preset conditions are met at the same time or not; and if yes, back blowing of the drying agent is carried out. By monitoring the system humidity and the parameters related to the noise, when whether the system humidity is larger than the preset first humidity threshold value and the parameters related to the noise meet the preset conditions or not is judged at the same time, back flushing of the drying agent is carried out, moisture in the drying agent is reduced, the noise generated when the drying agent is back flushed can be covered with the noise of the vehicle, and the safety of the vehicle is improved. And the user experience during back flushing of the drying agent by the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle suspensions, and particularly to a method for controlling the drying capacity of an active suspension air supply system and an active suspension air supply system. Background Art

[0002] An active suspension air supply system can actively form compressed air through an air compressor according to road conditions and send the compressed air to an air spring device to adjust the vehicle body height. The air compressor can draw air from the atmosphere, and the air contains water vapor. During the compression process of the air, the water vapor will liquefy. After passing through the desiccant, some moisture will still accumulate inside the system. After the air supply system works for a period of time, the water adsorption capacity of the desiccant reaches the upper limit, the drying function of the desiccant fails, and at the same time, other actuating components may fail, such as corrosion. Therefore, the desiccant usually needs to be regenerated regularly to prevent the drying function of the desiccant from failing.

[0003] Currently, the active suspension air supply system dries the compressed air through a desiccant and back blows the desiccant by exhausting air. For example, the high-pressure gas in the air storage tank or the air spring assembly flows through the desiccant in a reverse path, thereby bringing the moisture in the desiccant to the atmosphere to realize the regeneration of the drying capacity. However, when the desiccant is back blown, the noise generated by the system is relatively large, which will affect the user's riding experience. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for controlling the drying capacity of an active suspension air supply system and an active suspension air supply system, which can reduce the moisture in the desiccant and improve the user experience when the system back blows the desiccant.

[0005] The present invention provides a method for controlling the drying capacity of an active suspension air supply system, including: obtaining the system humidity and a parameter related to noise; determining whether it simultaneously satisfies that the system humidity is greater than a preset first humidity threshold and the parameter related to noise satisfies a preset condition; if so, performing back blowing of the desiccant.

[0006] In one embodiment, the parameter related to noise is one or several of vehicle noise decibels, motor speed, vehicle speed, and torque.

[0007] In one embodiment, the performing back blowing of the desiccant includes: heating the back blown gas or desiccant when performing back blowing of the desiccant.

[0008] In one embodiment, after determining whether it simultaneously satisfies that the system humidity is greater than a preset first humidity threshold and the parameter related to noise satisfies a preset condition, it further includes: if not, if it is monitored that when the vehicle body height decreases or the pressure in the air storage tank is greater than a preset pressure, the system exhausts air and simultaneously performs back blowing of the desiccant.

[0009] The present invention also provides an active suspension air supply system, including a controller for executing the above-mentioned drying capacity control method of the active suspension air supply system.

[0010] In one embodiment, the active suspension air supply system further includes an integrated heating module electrically connected to the controller for heating the back-blowing gas or desiccant when back-blowing the desiccant.

[0011] In one embodiment, the active suspension air supply system includes an air compressor, a distribution valve, an air storage tank, an air spring device and the controller; the air compressor includes a dryer and a motor-driven compressor; the dryer is provided with a desiccant; the distribution valve is respectively connected to the dryer, the air storage tank and the air spring device.

[0012] In one embodiment, the distribution valve is provided with a sensor, and the common air passage of the distribution valve is connected to the sensor for detecting the system humidity.

[0013] In one embodiment, the sensor is further integrated with a pressure detection unit for detecting the system pressure.

[0014] In one embodiment, the active suspension air supply system further includes a noise sensor electrically connected to the controller to provide the vehicle noise decibels.

[0015] The above-mentioned drying capacity control method of the active suspension air supply system and the active suspension air supply system monitor the system humidity and noise-related parameters. When it is judged that both the system humidity is greater than a preset first humidity threshold and the noise-related parameters meet the preset conditions, the desiccant is back-blown to reduce the moisture in the desiccant, and the vehicle noise can cover the noise during the desiccant back-blowing, improving the user experience when the system back-blows the desiccant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following will describe in detail the specific embodiments of the present invention with reference to the drawings.

[0017] Figure 1 It is a flowchart of the drying capacity control method of the active suspension air supply system according to an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the air flow direction during the desiccant back-blowing of the active suspension air supply system according to an embodiment of the present invention.

[0019] Figure 3 It is a specific flowchart of the drying capacity control method of the active suspension air supply system according to an embodiment of the present invention.

[0020] Figure 4 The specific flowchart of the drying capacity control method for the active suspension air supply system according to another embodiment of the present invention.

[0021] Figure 5 The system electrical schematic diagram of the active suspension air supply system according to an embodiment of the present invention.

[0022] Figure 6 The simplified electrical principle diagram of the active suspension air supply system according to an embodiment of the present invention.

[0023] Figure 7 The structural schematic diagram of the distribution valve of the active suspension air supply system according to an embodiment of the present invention.

[0024] Figure 8 The structural schematic diagram of the sensor of the active suspension air supply system according to an embodiment of the present invention.

[0025] Figure 9 The structural schematic diagram of the sensor of the active suspension air supply system according to another embodiment of the present invention. Specific embodiments

[0026] Next, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the description of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0028] Please refer to Figure 1 , Figure 1 The flowchart of the drying capacity control method for the active suspension air supply system according to an embodiment of the present invention. As Figure 1 shown, the embodiment of the present invention provides a drying capacity control method for an active suspension air supply system, including:

[0029] S100. Obtain the system humidity and parameters related to noise.

[0030] The controller (ECU, Electronic Control Unit) is used to obtain the system humidity and parameters related to noise. The parameters related to noise are those that directly or indirectly reflect the magnitude of vehicle noise. For example, it can be the vehicle noise decibel. The larger the vehicle noise decibel, the more directly it reflects the greater the vehicle noise. Another example can be parameters such as vehicle speed. The greater the vehicle speed, the greater the wind noise, tire noise, and engine noise generated by the vehicle, thus indirectly reflecting the greater the vehicle noise. Optionally, the parameters related to noise can be one or several of vehicle noise decibel, motor speed, vehicle speed, and torque. The controller can be connected to sensors to obtain the system humidity and parameters related to noise. For example, the system humidity of the gas in the air supply system can be obtained through a humidity sensor, and another example is that parameters related to noise such as vehicle noise decibel can be obtained through a noise sensor. The controller can also receive vehicle information data in real time through the CAN bus. The vehicle information data includes one or several of parameters related to noise such as motor speed, vehicle speed, and torque. Among them, the vehicle speed can be measured by a vehicle speed sensor or obtained by analyzing information sent from the vehicle instrument panel, body controller, vehicle braking system, automatic transmission controller, GPS, etc.

[0031] S200. Determine whether both the system humidity is greater than a preset first humidity threshold and the parameters related to noise meet the preset conditions.

[0032] The present invention does not limit the order of threshold determination. For example, in the first method (reference can be made to Figure 4 ), first determine whether the parameters related to noise meet the preset conditions. If so, then determine whether the system humidity is greater than the preset first humidity threshold. If so, then both the parameters related to noise meet the preset conditions and the system humidity is greater than the preset first humidity threshold are satisfied; in the second method, first determine whether the system humidity is greater than the preset first humidity threshold. If so, then determine whether the parameters related to noise meet the preset conditions. If so, then both the parameters related to noise meet the preset conditions and the system humidity is greater than the preset first humidity threshold are satisfied; in the third method (reference can be made to Figure 3 ), simultaneously determine whether the system humidity is greater than the preset first humidity threshold and whether the parameters related to noise meet the preset conditions. If both are true, then both the parameters related to noise meet the preset conditions and the system humidity is greater than the preset first humidity threshold are satisfied.

[0033] S300. If so, perform back-blowing of the desiccant.

[0034] If so, when the parameters related to noise satisfy the preset conditions and the system humidity is greater than the preset first humidity threshold, the backflush of the desiccant is started. Among them, the parameters related to noise satisfying the preset conditions can be that one or several of the parameters related to noise meet the preset value requirements, etc. For example, it can be that the vehicle noise decibel is greater than the preset decibel threshold, or it can be that the vehicle speed is greater than the preset vehicle speed threshold, etc., to perform the condition determination of a single parameter, or it can be that the vehicle noise decibel is greater than the preset decibel threshold and the vehicle speed is greater than the preset vehicle speed threshold at the same time, etc., to perform the condition determination of multiple parameters to prevent misjudgment. Among them, the preset decibel threshold, the preset vehicle speed threshold, the preset first humidity threshold, etc. can be set according to the system requirements. The controller monitors the parameters related to noise such as the vehicle speed to judge the magnitude of the interior noise of the vehicle. For example, when the vehicle speed is greater than the preset vehicle speed threshold, the vehicle noise is relatively large, which is mainly due to the following reasons: 1. Wind noise: The faster the vehicle speed, the greater the wind noise. That is, when the vehicle is running, the airflow around the vehicle body is uneven, resulting in noise generated by the friction between the air and the vehicle body; 2. Tire noise: The tire is the part where the vehicle contacts the road surface. The faster the vehicle speed, the greater the noise generated by the friction between the tire and the road surface; 3. Engine noise: The engine is the power source of the vehicle. The faster the vehicle speed, the higher the engine speed and the greater the amount of engine oil used. When the controller judges that the vehicle speed is greater than the preset vehicle speed threshold and the system humidity is greater than the preset first humidity threshold at the same time, the backflush of the desiccant is started, which can realize the regeneration of the drying capacity, avoid situations such as icing, water ingress, and rust, and has higher safety and reliability; at the same time, the vehicle noise can cover the noise during the backflush of the desiccant, improving the user experience when the system backflushes the desiccant.

[0035] In one embodiment, the preset value of the parameter related to noise, such as the size of the preset vehicle speed threshold, can be determined by first testing to obtain the different experience levels of users when the parameter related to noise, such as the vehicle speed, is at different magnitudes when starting the backflush of the desiccant.

[0036] Figure 2 It is a schematic diagram of the air flow direction during the backflush of the desiccant of the active suspension air supply system according to an embodiment of the present invention. As Figure 2 shown, when the desiccant is backflushed, the high-pressure gas in the air storage tank or the air spring assembly can flow through the distribution valve to the desiccant, making the desiccant contact the high-pressure gas, so as to blow out the moisture or other wet gas in the desiccant from the desiccant, and can be discharged to the atmosphere through the air compressor.

[0037] Figure 3Specific flowchart of the drying capacity control method for the active suspension air supply system according to an embodiment of the present invention. It can be understood that this embodiment is only illustrated by taking the parameter related to noise as vehicle speed as an example, and should not be construed as a limitation on the parameter related to noise, that is, the parameter related to noise is one or several of vehicle noise decibels, motor speed, vehicle speed, and torque, all of which fall within the protection scope of the present invention. Figure 3 For the implementation of the drying capacity control method of the active suspension air supply system, reference can be made to Figure 1 the implementation of the embodiment of

[0038] In one embodiment, as Figure 3 shown, the drying capacity control method of the active suspension air supply system further includes: S310, when performing backwashing of the desiccant, heating the backwashed gas or desiccant. Thus, the backwashed gas can more easily release the water contained in the desiccant, improving the regeneration efficiency of the dryer.

[0039] In one embodiment, as Figure 3 shown, the drying capacity control method of the active suspension air supply system further includes: S320, when it is determined that the system humidity is less than a preset second humidity threshold, terminate the backwashing of the desiccant. The second humidity threshold is less than the first humidity threshold and can be set according to system requirements. In other embodiments, the backwashing of the desiccant can be terminated when the backwashing duration reaches a preset time.

[0040] Figure 4 Specific flowchart of the drying capacity control method for the active suspension air supply system according to another embodiment of the present invention. It can be understood that this embodiment is only illustrated by taking the parameter related to noise as vehicle speed as an example, and should not be construed as a limitation on the parameter related to noise, that is, the parameter related to noise is one or several of vehicle noise decibels, motor speed, vehicle speed, and torque, all of which fall within the protection scope of the present invention. Figure 4 For the implementation of the drying capacity control method of the active suspension air supply system, reference can be made to Figure 1 the implementation of the embodiment of

[0041] In one embodiment, as Figure 4As shown, the method for controlling the drying capacity of the active suspension air supply system further includes, after determining whether it simultaneously meets the conditions that the system humidity is greater than the preset first humidity threshold and the parameter related to noise meets the preset conditions: S410, if not, and if it is monitored that when the vehicle body height decreases or the air storage tank pressure is greater than the preset pressure, the system exhausts air and simultaneously back blows the desiccant. Specifically, when the vehicle body height decreases or the air storage tank is greater than the preset pressure and air needs to be exhausted, noise will be generated during the exhaust process. At this time, the control is to turn on the back blowing of the desiccant, and the exhaust noise can cover the noise during the back blowing of the desiccant, improving the user experience when the system back blows the desiccant.

[0042] In one embodiment, when the vehicle body height decreases or the air storage tank is greater than the preset pressure, it is also determined whether the system humidity is greater than the preset first humidity threshold. If so, the system exhausts air and simultaneously back blows the desiccant. This can reduce the moisture in the desiccant, reduce the number of back blows, and prevent excessive back blowing from reducing the service life of the air compressor. The control strategy for the controller to control the back blowing of the desiccant can be as follows: 1. During vehicle driving, the vehicle speed is detected. When the vehicle speed is greater than the preset vehicle speed threshold, for example, 40 km / h, the controller reads the system humidity. When the system humidity is greater than the preset first humidity threshold, the desiccant is back blown through the operation of the air compressor or the exhaust of the air storage tank; 2. When the vehicle speed is less than the preset vehicle speed threshold, for example, 40 km / h, if the vehicle body height is adaptively adjusted and decreased, the airbag exhausts air to the outside of the system. The controller reads the system humidity. When the system humidity is greater than the preset first humidity threshold, the desiccant is back blown by opening the solenoid valve; 3. When the vehicle speed is less than the preset vehicle speed threshold, for example, 40 km / h, if the system detects that the air storage tank pressure is too high, such as greater than the preset pressure, and air needs to be exhausted to the outside of the system, the controller reads the system humidity. When the system humidity is greater than the preset first humidity threshold, the desiccant is back blown by opening the solenoid valve.

[0043] In one embodiment, the method for controlling the drying capacity of the active suspension air supply system further includes: when it is determined that the parameter related to noise does not meet the preset conditions and it is determined that the system humidity is greater than the preset first humidity threshold, the user is prompted through the display panel that the desiccant needs to be back blown, and the music player or the like can be prompted to be turned on, etc., to prompt the back blowing of the desiccant to reduce the moisture in the desiccant and improve the user experience when the system back blows the desiccant.

[0044] In one embodiment, the method for controlling the drying capacity of the active suspension air supply system further includes: when the system back blows the desiccant, it is determined whether the vehicle noise decibel is greater than the preset decibel threshold; if not, the music player or the like can be prompted to be turned on, etc., to reduce the moisture in the desiccant and improve the user experience when the system back blows the desiccant.

[0045] Based on the same inventive concept, an embodiment of the present invention further provides an active suspension air supply system, which includes a controller configured to execute the active suspension air supply system drying capacity control method of the above embodiment.

[0046] For the implementation of this active suspension air supply system, reference can be made to the embodiments of the above active suspension air supply system drying capacity control method, and repeated parts will not be elaborated here.

[0047] Figure 5 It is the system electrical schematic diagram of the active suspension air supply system according to an embodiment of the present invention. Figure 6 It is the simplified electrical principle diagram of the active suspension air supply system according to an embodiment of the present invention.

[0048] In one embodiment, as Figure 5 and Figure 6 shown, the active suspension air supply system includes an air compressor 200, a distribution valve 300, an air storage tank ( Figure 5 and Figure 6 not shown in the figure), an air spring device ( Figure 5 and Figure 6 not shown in the figure), and a controller 100; the air compressor 200 includes a dryer 210 and a motor-driven compressor; the dryer 210 is provided with a desiccant; the distribution valve 300 is respectively connected to the dryer 210, the air storage tank, and the air spring device. The controller 100 is configured to obtain the system humidity and parameters related to noise, and determine whether both the system humidity is greater than a preset first humidity threshold and the parameters related to noise meet the preset conditions; if so, perform backwashing of the desiccant. The parameters related to noise can be one or several of vehicle noise decibels, motor speed, vehicle speed, and torque.

[0049] In one of the embodiments, as Figure 5 and Figure 6 shown, the distribution valve 300 includes a first interface P for air circuit connection, a second interface RES, and a third interface ( Figure 5 for example, there are four, namely FR / RR / FL / RL), the first interface P is connected to the dryer 210, the second interface RES can be provided with an air storage tank switch valve and is connected to the air storage tank, and the third interface can be provided with an air spring switch valve and is connected to the air spring device.

[0050] In one of the embodiments, the air compressor 200 further includes a relay connected to the motor, and the relay is respectively connected to the motor and the controller 100. Then, the controller 100 can control the motor through the relay to make the air compressor 200 work.

[0051] In one embodiment, the active suspension air supply system further includes an integrated heating module. The integrated heating module is electrically connected to the controller and is used to heat the backflushing gas or desiccant when backflushing the desiccant. The integrated heating module is disposed on the equipment of the gas path, for example, disposed on the air compressor 200, to heat the backflushing gas or desiccant. In one of the embodiments, the integrated heating module includes a heating resistance wire, and the heating resistance wire generates heat by being energized, which can be used to heat the flowing air or desiccant. In another of the embodiments, the heat of the integrated heating module comes from the waste heat of the compressor or the motor, which can be used to heat the desiccant. Thus, the integrated heating module can better release the water contained in the desiccant into the flowing air and improve the regeneration efficiency of the desiccant.

[0052] Figure 7 FIG. 4 is a schematic structural diagram of the distribution valve 300 of the active suspension air supply system according to an embodiment of the present invention.

[0053] In one embodiment, as Figure 7 shown, the distribution valve 300 is provided with a sensor 310. The common air passage of the distribution valve 300 is connected to the sensor 310, and the sensor 310 is used to detect the system humidity. That is, the distribution valve 300 can be integrated with the sensor 310 to monitor the system humidity. However, the present invention is not limited to this structural position. For example, the sensor 310 can be disposed on the gas pipeline connected to the distribution valve 300, etc., which also belongs to the protection scope of the present invention.

[0054] In one of the embodiments, the sensor 310 is further integrated with a pressure detection unit to detect the system pressure. The sensor 310 integrated on the distribution valve 300 can be an integration of a humidity sensor and a pressure sensor to monitor the system humidity and pressure. However, the present invention is not limited to this. For example, the sensor 310 on the distribution valve 300 has a humidity sensor and a pressure sensor disposed at two positions respectively.

[0055] In one embodiment, as Figure 7 shown, one end of the sensor 310 is connected to the common air passage of the distribution valve 300, and the other end of the sensor 310 can be connected to the circuit board of the distribution valve 300 to achieve power supply and signal output.

[0056] Figure 8 FIG. 21 is a schematic structural diagram of the sensor 310 of the active suspension air supply system according to another embodiment of the present invention.

[0057] In one embodiment, as Figure 8As shown, the sensor 310 includes a sampling module and a first processing module 311. The sampling module is provided with a pressure unit 312 and a humidity-sensitive resistor. The pressure unit 312 is connected with a power supply interface, a pressure sampling output interface, and a ground interface. The first end of the humidity-sensitive resistor is connected to the PWM input interface, and its second end is connected to the humidity output interface. The first processing module 311 is provided with a PWM1 interface, a PWM2 interface, and an ADC interface. The PWM1 interface is connected to the PWM input interface. The PWM2 interface is connected to the humidity output interface through a preset resistor. The ADC interface is connected to the humidity output interface and can be grounded through a capacitor. A preset resistor is provided between the humidity output interface and the PWM2 interface. Among them, the square wave signals output by the PWM1 interface and the PWM2 interface have opposite phases but the same amplitude and frequency. The ADC interface of the first processing module 311 receives an analog signal for the controller 100 to process to obtain the system humidity.

[0058] Figure 9 It is a schematic structural diagram of the sensor 310 of the active suspension air supply system according to another embodiment of the present invention.

[0059] In one embodiment, as Figure 9 shown, the sensor 310 includes a pressure unit 313 and a second processing module 314 arranged on the same circuit board. The circuit board is provided with a power supply interface, a digital output interface, and a ground interface. The pressure unit 313 is connected to the second processing module 314. The two output ports of the second processing module 314 are respectively connected to the two ends of the resistor string of the humidity-sensitive resistor and the preset resistor. The connection point of the humidity-sensitive resistor and the preset resistor is grounded through a capacitor and is connected to the input end of the second processing module 314. The second processing module 314 is connected to the digital output interface and outputs a digital signal for the controller 100 to process to obtain the system humidity.

[0060] In one embodiment, when the parameters related to noise do not meet the preset conditions, if the vehicle body height decreases or the air storage tank pressure is too high, such as greater than the preset pressure, the system exhausts and simultaneously performs backwashing of the desiccant.

[0061] In one embodiment, when the controller 100 determines that the parameters related to noise do not meet the preset conditions and determines that the system humidity is greater than the preset first humidity threshold, it prompts the user through the display panel that the desiccant needs to be backwashed, and can prompt to turn on the music player, etc., to prompt to start backwashing the desiccant to reduce the moisture in the desiccant and improve the user experience when the system backwashes the desiccant.

[0062] In one embodiment, the active suspension air supply system further includes a noise sensor electrically connected to the controller 100 to provide the vehicle noise decibels. In one of the embodiments, the controller 100 is configured to determine whether the parameters related to noise are satisfied, that is, the vehicle noise decibels are greater than a preset decibel threshold and the system humidity is greater than a preset first humidity threshold; if so, backflush the desiccant. In one of the embodiments, when the system backflushes the desiccant, the controller 100 is configured to determine whether the parameters related to noise are satisfied, that is, the vehicle noise decibels are greater than a preset decibel threshold; if not, it can prompt to turn on a music player or the like to reduce the moisture in the desiccant and improve the user experience when the system backflushes the desiccant.

[0063] The method for controlling the drying capacity of the active suspension air supply system and the active suspension air supply system according to the embodiments of the present invention monitor the system humidity and the parameters related to noise. When it is determined whether both the system humidity is greater than the preset first humidity threshold and the parameters related to noise meet the preset conditions, backflush the desiccant to reduce the moisture in the desiccant, and the vehicle noise can cover the noise during the backflush of the desiccant, improving the user experience when the system backflushes the desiccant.

[0064] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments with equivalent changes within the scope of the technical solution of the invention. However, as long as it does not deviate from the content of the technical solution of the invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for controlling the drying capacity of an active suspension air supply system, characterized in that, it includes: Obtaining the system humidity and parameters related to noise; Judging whether it simultaneously satisfies that the system humidity is greater than a preset first humidity threshold and the parameters related to noise satisfy preset conditions; If so, perform backwashing of the desiccant.

2. The method for controlling the drying capacity of an active suspension air supply system according to claim 1, characterized in that, the parameters related to noise are one or several of vehicle noise decibels, motor speed, vehicle speed, and torque.

3. The method for controlling the drying capacity of an active suspension air supply system according to claim 1, characterized in that, the performing of backwashing the desiccant includes: When performing backwashing of the desiccant, heating the backwashed gas or desiccant.

4. The method for controlling the drying capacity of an active suspension air supply system according to claim 1, characterized in that, after judging whether it simultaneously satisfies that the system humidity is greater than a preset first humidity threshold and the parameters related to noise satisfy preset conditions, it further includes: If not, if it is monitored that when the vehicle body height decreases or the air storage tank pressure is greater than the preset pressure, the system exhausts and simultaneously performs backwashing of the desiccant.

5. An active suspension air supply system, characterized in that, it includes a controller, and the controller is used to execute the method for controlling the drying capacity of an active suspension air supply system according to any one of claims 1 to 4.

6. The active suspension air supply system according to claim 5, characterized in that, it further includes an integrated heating module, and the integrated heating module is electrically connected to the controller to heat the backwashed gas or desiccant when performing backwashing of the desiccant.

7. The active suspension air supply system according to claim 5, characterized in that, the active suspension air supply system includes an air compressor, a distribution valve, an air storage tank, an air spring device, and the controller; the air compressor includes a dryer and a compressor driven by a motor; the dryer is provided with a desiccant; the distribution valve is respectively connected to the dryer, the air storage tank, and the air spring device.

8. The active suspension air supply system according to claim 7, characterized in that, the distribution valve is provided with a sensor, and the common air duct of the distribution valve is connected to the sensor, and the sensor is used to detect the system humidity.

9. The active suspension air supply system according to claim 8, characterized in that, the sensor is further integrated with a pressure detection unit to detect the system pressure.

10. The active suspension air supply system according to claim 5, characterized in that, it further includes a noise sensor, and the noise sensor is electrically connected to the controller to provide vehicle noise decibels.

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