Device and method for controlling wind-induced noise of automobile

Abstract

The technical solution adopted by the present invention is: a device and method for controlling automobile wind vibration noise, including a plurality of elastic airbags, an inflating device and a control system; the elastic airbag is arranged inside the automobile interior panel; the inflating device is arranged between the automobile interior panel and the automobile outer shell sheet metal or between the automobile interior panel and the automobile bottom plate; the control system is used to determine whether wind vibration noise occurs inside the car compartment according to the received vehicle status information; when the control system determines that wind vibration noise occurs inside the car compartment, the control system drives the inflating device to inflate the elastic airbag, so that the volume of the elastic airbag increases and enters the interior of the car compartment to reduce the interior space of the car compartment. The present invention changes the acoustic cavity inside the car by changing the size of the car compartment space, effectively controlling the wind vibration noise without changing the appearance of the car and increasing the aerodynamic resistance of the car when driving.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile noise, and in particular relates to a device and method for controlling automobile wind vibration noise. Background Art

[0002] Wind buffeting noise is generated when the side windows or sunroof of a car are open while driving. The frequency of wind buffeting noise is low but the intensity is high. If the human body is exposed to wind buffeting noise for a long time, it is easy to feel tired and uncomfortable. Therefore, in order to ensure riding comfort, the impact of wind buffeting noise must be considered during the car design stage.

[0003] The mechanism of wind noise generation is similar to the principle of Helmholtz resonator. Helmholtz resonator is a basic acoustic resonance system, the most typical of which is a rigid container with an open short tube.

[0004] like Figure 1 As shown, when the air inside the cavity is forcibly compressed by the external wave P, it will cause the air section A in the short tube to vibrate, and the air in the cavity will produce a restoring force on it, forming a vibration system composed of the air mass of the short tube and the elasticity of the air in the cavity, which will produce a resonance effect on the applied wave.

[0005] When the side windows or sunroof of a car are open, the interior space is similar to a Helmholtz resonator with its basic characteristics.

[0006] Wind buffeting noise is a type of cavity noise. When the side windows or sunroof of a car are opened, a cavity is formed in the car. There is an unstable shear layer at the upstream edge (leading edge) of the cavity opening, causing the vortex to fall off at this position and flow backward with the airflow. The vortex hits the trailing edge of the opening and breaks, generating a pressure wave that propagates in all directions. The pressure wave that travels in the direction reaches the leading edge of the opening, which will cause the vortex to fall off again. The above process will be repeated many times per second, and the shear layer will generate a specific vibration frequency. When this frequency is the same as the natural frequency of the car, resonance will occur, causing wind buffeting noise.

[0007] This resonance is called Helmholtz resonance, and the resonance frequency depends on the vehicle speed, opening shape, cabin space size, etc. There are generally the following ways to change the wind vibration phenomenon: changing the natural frequency of the cabin cavity, reducing or eliminating the pressure wave of the window, changing the window shape, etc. Most of the existing patents destroy the formation of window vortices by adding guide plates, spoilers, jet airflow, etc., thereby controlling wind vibration noise, but it will affect the appearance of the car and increase the aerodynamic resistance of the whole vehicle when driving.

[0008] Prior art 1:

[0009] By adding a guide plate to the B-pillar of the car, the formation of the vortex is destroyed, thereby controlling the wind vibration noise. If the car is in a driving state and the wind vibration noise inside the car exceeds the preset threshold, then according to the wind noise signal of the car window, the drive mechanism drives the transmission telescopic mechanism to drive the pillar exterior panel to rotate around the rotating connection to the optimal opening angle corresponding to the wind noise signal, and the pillar exterior panel rotated to the optimal opening angle guides the incoming airflow in front of the car window away, so as to adjust the wind vibration noise inside the car to the preset threshold. The optimal opening angle of the pillar exterior panel is accurately determined by the wind noise signal, thereby effectively reducing the wind vibration noise of the car window. When the device is working, a large baffle extends outside the car body, which not only affects the appearance of the car, but also increases the aerodynamic resistance.

[0010] Prior art 2:

[0011] Vortex generators are arranged at intervals in the height extension direction of the B-pillar of the automobile. Each vortex generator can be arranged on the B-pillar in a lifting manner, and the lifting of each vortex generator can be independently controlled; when this device is working, some or all of the vortex generators rise from the B-pillar and protrude from the surface of the B-pillar; when this device is not working, each vortex generator is lowered. The vortex generator can prevent the formation of airflow vortices, thereby controlling wind vibration. This method also uses the method of adding a guide device to destroy the formation of vortices. This method affects the appearance of the car. It will also increase wind resistance to a certain extent. Summary of the invention

[0012] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and to provide a device and method for controlling automobile wind buffeting noise. By changing the size of the car compartment space to change the sound cavity inside the car, the wind buffeting noise can be effectively controlled without changing the appearance of the car or increasing the aerodynamic resistance of the car when driving.

[0013] The technical solution adopted by the present invention is: a device for controlling automobile wind-vibration noise, comprising a plurality of elastic airbags, an inflation device and a control system; the elastic airbag is arranged inside the automobile interior panel; the inflation device is arranged between the automobile interior panel and the automobile outer shell or between the automobile interior panel and the automobile bottom plate; the control system is used to determine whether wind-vibration noise occurs inside the vehicle compartment according to the received vehicle status information; when the control system determines that wind-vibration noise occurs inside the vehicle compartment, the control system drives the inflation device to inflate the elastic airbag, so that the volume of the elastic airbag increases and enters the interior of the vehicle compartment to reduce the internal space of the vehicle compartment.

[0014] In the above technical solution, the plurality of elastic airbags are distributed in the front and lower sides of the seats, the ceiling, the B-pillar, the C-pillar, the auxiliary instrument panel and the automobile interior panel behind the rear seats; after the elastic airbags are filled with air, they are located outside the field of vision of the driver's rearview mirror. The elastic airbags of the present invention are distributed in the effectively usable space in the vehicle compartment, and while the space is reasonably utilized, they are ensured not to be in the driver's field of vision, thereby ensuring the safety of the formation process.

[0015] In the above technical solution, when the elastic airbag is not inflated, the airbag is flush with the surface of the automobile interior trim panel at the installation position. The present invention minimizes the space occupied in the vehicle compartment by reasonably setting the installation position of the airbag.

[0016] In the above technical solution, the process of the control system for judging whether wind vibration noise occurs inside the vehicle compartment according to the received vehicle status information includes: the control system obtains the window status signal, the current vehicle speed, and the vehicle interior noise detected in real time by the vehicle-mounted microphone; when the control system judges that the window is open and the current vehicle speed exceeds the vehicle speed threshold, and the frequency of the vehicle interior noise is within the set range and the sound pressure level exceeds the first set threshold, the control system judges that wind vibration noise occurs inside the vehicle compartment. The present invention reasonably sets the set threshold, and only when all conditions are met at the same time, it is judged that wind vibration noise occurs, thereby ensuring the accuracy of the judgment result.

[0017] In the above technical solution, when the control system drives the inflating device to inflate the elastic airbag, when the control system determines that the sound pressure level of the wind vibration noise inside the vehicle compartment is reduced to the first set threshold, the control system controls the inflating device to stop working, and the volume of the elastic airbag remains unchanged. When the present invention determines that the sound pressure level of the wind vibration noise is reduced to a range acceptable to passengers, it stops inflating the elastic airbag, ensuring that the elastic airbag does not occupy too much space inside the vehicle, and achieving a balance between noise reduction and maximization of vehicle interior space.

[0018] In the above technical solution, when the control system determines that the sound pressure level of the wind vibration noise inside the vehicle compartment continuously decreases from the first set threshold to the second set threshold, the control system controls the inflatable device to release the air in the elastic airbag to reduce the volume of the elastic airbag. The size of the elastic airbag of the present invention will be dynamically adjusted according to the size of the wind vibration noise. Within a certain range, a dynamic balance between the noise and the volume of the elastic airbag is achieved.

[0019] The above technical solution also includes a seat pressure sensor, which is arranged under each seat and is used to detect the pressure information of each seat and send the detected pressure information to the control system; the control system determines whether there is a passenger in each seat according to the pressure information; when the control system determines that there is a passenger in a seat, the elastic airbag located in front of the seat will not be inflated. When the seat pressure sensor of the present invention detects that there is someone in the seat, the elastic airbag at that location will not be inflated, thereby ensuring the riding comfort of the passengers.

[0020] In the above technical solution, the inflation device includes a blower and an airflow duct; the number of the blowers is the same as that of the elastic airbags and they are arranged one-to-one with the elastic airbags; the air outlet of the blower is connected to the air inlet of the elastic airbag through the airflow duct; the signal input end of the blower is connected to the signal output end of the control system. The present invention controls the inflation and deflation process of each elastic airbag by controlling the rotation direction of each blower, ensuring that the inflation and deflation process of the elastic airbag is effectively realized and relatively independent, and ensuring that when the seat pressure sensor detects that there is someone on the seat, the elastic airbag at that location will not be inflated.

[0021] In the above technical solution, the elastic airbag is provided with a pressure relief valve for deflation; the signal input end of the pressure relief valve is connected to the signal output end of the control system. The present invention controls the deflation process of each elastic airbag by controlling the pressure relief valve of each elastic airbag, and ensures that the deflation valve is opened or closed according to the state in the vehicle.

[0022] In the above technical solution, the inflation device includes a blower and an airflow duct; there is only one blower; the air outlet of the blower is connected to the air inlet of the elastic airbag through the airflow duct; an air inlet valve is provided at the connection point between the air inlet of the elastic airbag and the airflow duct; the signal input end of the blower is connected to the signal output end of the control system. The present invention effectively optimizes the layout space in the vehicle by providing a blower, and by providing an air inlet valve for each elastic airbag, it ensures that the inflation process of the elastic airbag is effectively implemented and relatively independent, and ensures that when the seat pressure sensor detects that there is someone on the seat, the elastic airbag at that location will not be inflated.

[0023] The present invention also provides a method for controlling automobile wind-vibration noise, comprising the following steps: real-time detection of vehicle status information; judging whether wind-vibration noise occurs inside the vehicle compartment based on the received vehicle status information; when it is judged that wind-vibration noise occurs inside the vehicle compartment, driving an inflation device to inflate an elastic airbag arranged inside the automobile interior trim panel, so that the volume of the elastic airbag increases and enters the interior of the vehicle compartment to reduce the internal space of the vehicle compartment.

[0024] The beneficial effects of the present invention are as follows: the present invention can effectively control wind vibration noise, avoid user complaints, unhappiness, and even irreversible hearing loss, and improve the user's comfort when driving with the window open at low and medium speeds. The present invention provides an elastic airbag in the car whose volume changes with the noise in the car, while ensuring that the noise reduction function is effectively realized without adding devices to the exterior of the car, changing the appearance of the car, and increasing the aerodynamic resistance during driving. The present invention monitors the vehicle's operating status in real time to ensure that when wind vibration noise occurs, the wind vibration noise can be automatically adjusted to a sound pressure level range acceptable to humans, which can reduce the amount of human operation during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the prior art

[0026] Figure 2 This is a schematic diagram of the structure of this specific embodiment 1;

[0027] Figure 3 This is a schematic diagram of the structure of the specific embodiment 2;

[0028] Figure 4 This is a schematic diagram of the structure of this specific embodiment 3;

[0029] Figure 5 It is a schematic diagram of the process of the present invention;

[0030] Figure 6 It is a schematic diagram of the general arrangement of the present invention;

[0031] Figure 7 Schematic diagram of the use effect of the present invention.

[0032] Among them, 1-blower, 2-airflow duct, 3-elastic airbag, 4-pressure relief valve, 5-intake valve, 6-vehicle window. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0034] like Figure 2-3 As shown, the present invention provides a device for controlling wind-vibration noise of an automobile, comprising a plurality of elastic airbags 3, an inflation device and a control system; the elastic airbags 3 are arranged inside the automobile interior panel; the inflation device is arranged between the automobile interior panel and the automobile outer shell or between the automobile interior panel and the automobile bottom plate; the control system is used to determine whether wind-vibration noise occurs inside the vehicle compartment according to the received vehicle status information; when the control system determines that wind-vibration noise occurs inside the vehicle compartment, the control system drives the inflation device to inflate the elastic airbags 3, so that the volume of the elastic airbags 3 increases and enters the interior of the vehicle compartment to reduce the internal space of the vehicle compartment.

[0035] Specifically, the plurality of elastic airbags 3 are distributed in the front and lower sides of the seats, the ceiling, the B-pillar, the C-pillar, the auxiliary instrument panel and the automobile interior panel behind the rear seats (other locations are also feasible if airbags can be installed); after the elastic airbags 3 are filled with air, they are located outside the field of vision of the driver's rearview mirror. The elastic airbags 3 of the present invention are distributed in the effectively usable space in the vehicle compartment, and while the space is reasonably utilized, they are ensured not to be in the driver's field of vision, thereby ensuring the safety of the formation process.

[0036] Specifically, when the elastic airbag 3 is not inflated, the airbag is flush with the surface of the automobile interior trim panel at the installation position. The present invention minimizes the space occupied in the vehicle compartment by reasonably setting the installation position of the airbag.

[0037] The above technical solution also includes a seat pressure sensor, which is arranged under each seat and is used to detect the pressure information of each seat and send the detected pressure information to the control system to determine whether the seat is occupied or whether a heavy object is placed on the seat; the control system determines whether there is a passenger in each seat based on the pressure information; when the control system determines that there is a passenger in a seat, the elastic airbag 3 located in front of the seat is not inflated. When the seat pressure sensor of the present invention detects that there is someone in the seat, the elastic airbag 3 at that location will not be inflated, thereby ensuring the comfort of the passenger.

[0038] like Figure 2 As shown, in the specific embodiment 1 of the present invention, the inflation device includes a blower 1 and an airflow duct 2; the number of the blowers 1 is the same as the elastic airbag 3 and they are arranged one by one with the elastic airbag 3; the air outlet of the blower 1 is connected to the air inlet of the elastic airbag 3 through the airflow duct 2; the signal input end of the blower 1 is connected to the signal output end of the control system. The present invention controls the inflation and deflation process of each elastic airbag 3 by controlling the rotation direction of each blower 1, ensuring that the inflation and deflation process of the elastic airbag 3 is effectively realized and relatively independent, and ensuring that when the seat pressure sensor detects that there is someone on the seat, the elastic airbag 3 at that location will not be inflated.

[0039] like Figure 3 As shown, compared with the specific embodiment 1, the specific embodiment 2 of the present invention is that the elastic airbag 3 is provided with a pressure relief valve 4 for deflation; the signal input end of the pressure relief valve 4 is connected to the signal output end of the control system. The present invention controls the process of deflation of each elastic airbag 3 by controlling the pressure relief valve 4 of each elastic airbag 3, and ensures that the deflation valve is opened or closed according to the state in the vehicle.

[0040] like Figure 4As shown, in the specific embodiment 3 of the present invention, the inflation device includes a blower 1 and an airflow duct 2; there is only one blower 1; the air outlet of the blower 1 is connected to the air inlet of the elastic airbag 3 through the airflow duct 2; an air intake valve 5 is provided at the connection point between the air inlet of the elastic airbag 3 and the airflow duct 2; the signal input end of the blower 1 is connected to the signal output end of the control system. The present invention effectively optimizes the layout space in the vehicle by providing a blower 1, and by providing an air intake valve 5 for each elastic airbag 3, it is ensured that the inflation process of the elastic airbag 3 is effectively realized and relatively independent, and that when the seat pressure sensor detects that there is someone on the seat, the elastic airbag 3 at that location will not be inflated.

[0041] Preferably, the process of the control system for determining whether wind vibration noise occurs inside the vehicle compartment according to the received vehicle status information comprises:

[0042] The control system obtains the window status signal, the current vehicle speed, and the in-car noise detected in real time by the on-board microphone; when the control system determines that the window is open and the current vehicle speed exceeds the vehicle speed threshold, and the frequency of the in-car noise is within the set range and the sound pressure level exceeds the first set threshold, the control system determines that wind vibration noise occurs inside the car. The present invention reasonably sets the set threshold, and only when all conditions are met at the same time, it is judged that wind vibration noise has occurred, thereby ensuring the accuracy of the judgment result. The on-board microphone uses a microphone to monitor whether wind vibration noise occurs in the car and the decibel value of the wind vibration sound pressure; it provides the control system with an input reference of wind vibration noise, which is used to control the volume of the airbag.

[0043] Specifically, in the process of the control system driving the inflation device to inflate the elastic airbag 3, when the control system determines that the sound pressure level of the wind vibration noise inside the car compartment is reduced to the first set threshold, the control system controls the inflation device to stop working, and the volume of the elastic airbag 3 remains unchanged. When the present invention determines that the sound pressure level of the wind vibration noise is reduced to a range acceptable to passengers, it stops inflating the elastic airbag 3 to ensure that the elastic airbag 3 does not occupy too much space in the car, and strikes a balance between noise reduction and maximizing the space in the car. In the process of the control system driving the blower 1 to inflate the airbag, the volume of the elastic airbag 3 gradually increases until the wind vibration noise is reduced to below the sound pressure acceptable to humans, the blower 1 stops working, and the increase in the volume of the airbag stops.

[0044] In the above technical scheme, when the control system determines that the sound pressure level of the wind vibration noise inside the car compartment continues to decrease from the first set threshold to the second set threshold, the control system controls the inflatable device to release the air in the elastic airbag 3 to reduce the volume of the elastic airbag 3. When the state of the window opening changes, the speed of the vehicle changes, and other factors cause the wind vibration to decrease (i.e., below the second set threshold value of the wind vibration noise) or disappear, it is detected by the microphone, and the control system will release the air in the elastic airbag 3 to reduce the volume of the elastic airbag 3 and release the space in the car compartment (increase the volume of the car compartment). The present invention can adjust the volume of the airbag by detecting the size change of the wind vibration noise in the car, thereby changing the modal frequency of the car compartment sound cavity, avoiding the wind vibration excitation frequency and the car compartment air self-vibration frequency, destroying the conditions for resonance, and thus solving the problem of wind vibration noise. The size of the elastic airbag 3 of the present invention will be dynamically adjusted according to the size of the wind vibration noise. Within a certain range, a dynamic balance between noise and the volume of the elastic airbag 3 is achieved.

[0045] like Figure 4 As shown, the present invention also provides a method for controlling automobile wind vibration noise, and the specific process is as follows:

[0046] S1, the control system obtains the window or sunroof opening signal and the current vehicle speed from the vehicle CAN, etc., and obtains information such as whether each seat is occupied from the seat pressure sensor. This is used to determine whether the conditions for wind vibration are met.

[0047] S2, the on-board microphone detects the noise inside the car all the time. When low-frequency wind vibration noise appears, it is detected by the microphone. The frequency of low-frequency wind vibration noise is generally 10-20Hz. This frequency range (10-20Hz) can be obtained through actual vehicle measurement, or by measuring the actual vehicle's cabin volume, window opening area, door glass thickness (airway length), and establishing a simulation model to calculate it.

[0048] S3, using the information obtained in steps S1 and S2 (window status, vehicle speed, wind vibration rhythm, frequency, sound pressure level, etc. measured by the microphone) as a condition for determining whether wind vibration noise occurs. When the window is open and the vehicle speed is above 40 km / h, and the microphone detects the presence of high-intensity low-frequency noise with a frequency of 10-20 Hz in the vehicle, and the sound pressure level of the noise is above 90 dB, the control system determines that wind vibration noise has occurred (i.e., when the above conditions are met at the same time, the control system determines that wind vibration noise has occurred).

[0049] S4, the control system turns on the blower 1 to inflate the elastic airbag 3. The volume of the elastic airbag 3 increases, occupying the space in the car. The volume of the car will decrease. If the seat pressure sensor detects that someone is sitting in a seat, the elastic airbag 3 in front of the seat will not be inflated, and the other elastic airbags 3 will change synchronously.

[0050] S5, as the volume of the elastic airbag 3 increases, when the microphone in the car detects that the sound pressure level of the wind vibration noise drops below 90dB (which can be freely set within a certain range according to human acceptance), the control system controls the blower 1 to stop working, and the volume of the elastic airbag 3 remains unchanged.

[0051] S6, when the microphone in the vehicle detects that the sound pressure level of the wind vibration noise drops below 86dB, the control system starts the pressure relief valve 4 or controls the blower 1 to reverse, releasing the air in the elastic airbag 3 to reduce the volume of the elastic airbag 3. The elastic airbag 3 makes room in the vehicle compartment.

[0052] S7, when the volume of the airbag is reduced, the microphone inside the car still detects the size of the wind vibration noise inside the car in real time. If the sound pressure level of the wind vibration noise reaches 90dB or above during the process of the elastic airbag 3 reducing its volume, the control system controls the pressure relief valve 4 to close or the blower 1 to stop working, and the airbag will stop further reducing.

[0053] S8, if during the volume reduction process of the elastic airbag 3, the control system determines that the situation inside the vehicle meets the judgment condition for the occurrence of wind buffeting noise, step S4 is executed again.

[0054] The control system adjusts the working state of the blower 1 and the air release valve according to the magnitude of the wind vibration noise, and realizes the dynamic adjustment of the elastic airbag 3. Within a certain range, a dynamic balance between the noise and the airbag volume is achieved.

[0055] like Figure 7 As shown, after the elastic airbag 3 is opened, the decibel peak value of the wind vibration noise is significantly reduced compared with before the elastic airbag 3 is opened.

[0056] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A device for controlling wind-induced noise of a car. Features: It comprises a plurality of elastic airbags, an inflating device and a control system; the elastic airbag is arranged inside the automobile interior panel; the inflating device is arranged between the automobile interior panel and the automobile outer shell sheet metal or between the automobile interior panel and the automobile bottom plate; the control system is used to judge whether wind vibration noise occurs inside the vehicle compartment according to the received vehicle status information; when the control system determines that wind vibration noise occurs inside the vehicle compartment, the control system drives the inflating device to inflate the elastic airbag, so that the volume of the elastic airbag increases and enters the interior of the vehicle compartment to reduce the internal space of the vehicle compartment.

2. A device for controlling automobile wind-induced noise according to claim 1, Features: The multiple elastic airbags are distributed on the front and bottom of the seats, the ceiling, the B-pillar, the C-pillar, the auxiliary instrument panel and the automobile interior panels behind the rear seats; when the elastic airbags are inflated, they are located outside the field of vision of the driver's rearview mirror; when the elastic airbags are not inflated, the airbags are flush with the surface of the automobile interior panels at the installation position.

3. A device for controlling automobile wind-induced noise according to claim 1, Features: The process of the control system for determining whether wind buffeting noise occurs inside the vehicle cabin based on the received vehicle status information includes: the control system acquires a vehicle window status signal, a current vehicle speed, and vehicle cabin noise detected in real time by a vehicle-mounted microphone; when the control system determines that the vehicle window is open and the current vehicle speed exceeds a vehicle speed threshold, and at the same time, the frequency of the vehicle cabin noise is within a set range and the sound pressure level exceeds a first set threshold, the control system determines that wind buffeting noise occurs inside the vehicle cabin.

4. The device for controlling automobile wind-induced noise according to claim 1, Features: During the process of the control system driving the inflation device to inflate the elastic airbag, when the control system determines that the sound pressure level of wind-vibration noise inside the vehicle cabin drops to a first set threshold, the control system controls the inflation device to stop working and the volume of the elastic airbag remains unchanged.

5. The device for controlling automobile wind-induced noise according to claim 3, Features: When the control system determines that the sound pressure level of wind-vibration noise inside the vehicle cabin continuously decreases from the first set threshold value to the second set threshold value, the control system controls the inflation device to release the air in the elastic airbag to reduce the volume of the elastic airbag.

6. A device for controlling automobile wind-induced noise according to claim 3, Features: It also includes a seat pressure sensor, which is arranged under each seat and is used to detect the pressure information of each seat and send the detected pressure information to the control system; the control system determines whether there is a passenger in each seat based on the pressure information; when the control system determines that there is a passenger in a seat, the elastic airbag located in front of the seat is not inflated.

7. A device for controlling automobile wind-induced noise according to claim 6, Features: The inflation device includes a blower and an airflow duct; the number of the blowers is the same as that of the elastic airbags and they are arranged one-to-one with the elastic airbags; the air outlet of the blower is connected to the air inlet of the elastic airbag through the airflow duct; the signal input end of the blower is connected to the signal output end of the control system.

8. The device for controlling automobile wind-induced noise according to claim 3, Features: The elastic airbag is provided with a pressure relief valve for deflation; the signal input end of the pressure relief valve is connected to the signal output end of the control system.

9. A device for controlling automobile wind-induced noise according to claim 8, Features: The inflation device includes a blower and an airflow duct; there is only one blower; the air outlet of the blower is connected to the air inlet of the elastic airbag through the airflow duct; an air inlet valve is provided at the connection point between the air inlet of the elastic airbag and the airflow duct; the signal input end of the blower is connected to the signal output end of the control system.

10. A method for controlling wind-induced noise of a vehicle. Features: The following steps are involved: Real-time detection of vehicle status information; judging whether wind buffeting noise occurs inside the vehicle cabin based on the received vehicle status information; when it is judged that wind buffeting noise occurs inside the vehicle cabin, driving the inflation device to inflate the elastic airbag disposed inside the vehicle interior trim panel, so that the volume of the elastic airbag increases and enters the vehicle cabin to reduce the internal space of the vehicle cabin.

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