CN112879123A - Exhaust system and method with personalized sound wave acceleration function - Google Patents
Exhaust system and method with personalized sound wave acceleration function Download PDFInfo
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- CN112879123A CN112879123A CN202110112120.0A CN202110112120A CN112879123A CN 112879123 A CN112879123 A CN 112879123A CN 202110112120 A CN202110112120 A CN 202110112120A CN 112879123 A CN112879123 A CN 112879123A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
- F01N1/065—Silencing apparatus characterised by method of silencing by using interference effect by using an active noise source, e.g. speakers
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The application relates to an exhaust system and a method with personalized sound wave acceleration, which belong to the technical field of automobile sound production, wherein the exhaust system comprises: a muffler assembly for coupling to an engine and emitting a raw exhaust sound; the controller is used for acquiring original exhaust sound, performing Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifying or suppressing the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum; and the sound generator is used for receiving the accelerated sound wave frequency spectrum sent by the controller and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound. The exhaust system has the advantages that the exhaust system not only can have the exhaust sound with the original noise reduction effect when the controller is closed, but also can realize the effect of exhausting and accelerating the sound waves of the traditional fuel vehicle when the controller is opened; the controller stores a plurality of acoustic schemes and realizes the switching of different sound wave schemes. The individuation of the exhaust system is that the exhaust system can be opened or closed manually or different sound wave effects can be selected according to the preference.
Description
Technical Field
The application relates to the technical field of automobile sounding, in particular to an exhaust system and method with personalized sound wave acceleration.
Background
With the development of the automobile industry, one of the main functions of an exhaust system of an automobile engine is to eliminate noise for the exhaust system of the automobile. Noise, Vibration and Harshness (Noise, Vibration, Harshness) are a comprehensive measure of the quality of an automobile's manufacture, and generally give the most immediate and surface experience to the automobile user. The traditional acoustic mode of single NVH state can not meet the use requirement of users gradually.
The traditional exhaust silencing is controlled by a silencer, but the silencer can only reduce noise in a passive mode, and cannot meet the requirements of customers on special sound quality, and meanwhile, each set of exhaust system can only have one sound after the structural design is completed, and cannot meet the requirements of individual driving experience of different users. For the user, such a single driving mode will result in a lack of driving pleasure for the user and a poor user engagement, which seriously affects the user experience.
Disclosure of Invention
The embodiment of the application provides an exhaust system and method with personalized sound wave acceleration, and aims to overcome the defects that in the related art, the exhaust system has single exhaust sound and cannot meet the personalized driving experience requirements of different users.
A first aspect of an embodiment of the present application provides an exhaust system with personalized sound wave acceleration, including:
a muffler assembly for coupling to an engine and emitting a raw exhaust sound;
the controller is used for acquiring original exhaust sound, performing Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifying or suppressing the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum;
and the sound generator is used for receiving the accelerated sound wave frequency spectrum sent by the controller and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
In some embodiments: the controller is connected with a whole vehicle CAN network, and the controller acquires original exhaust sound emitted by the muffler assembly of the engine under set rotating speed and load through the whole vehicle CAN network.
In some embodiments: the controller is connected with a finished automobile CAN network, and the controller acquires an engine ignition signal through the finished automobile CAN network and then sends an acceleration sound wave frequency spectrum to the sounder according to the engine at a set rotating speed and under a set load.
In some embodiments: the controller amplifies or suppresses an original sound frequency spectrum to obtain a plurality of accelerated sound wave frequency spectrums and stores the accelerated sound wave frequency spectrums, the controller is connected with a human-computer interaction device, and the human-computer interaction device is in communication connection with the controller through a wireless gateway;
the man-machine interaction device is provided with a selection control for displaying the acceleration sound wave frequency spectrum mode, and the acceleration sound wave frequency spectrum mode selected by the user is sent to the controller.
In some embodiments: the controller is equipped with the master switch of connecting whole car battery, master switch is used for controlling the controller to open or break off, the controller is the driving computer.
In some embodiments: the muffler assembly comprises a front muffler connected with the engine, the front muffler is connected with a rear muffler, the rear muffler is provided with a tail pipe, and the controller acquires the original exhaust sound emitted by the tail pipe.
In some embodiments: the sounder comprises a shell and a sounding horn which is positioned in the shell and used for emitting sound signals corresponding to frequency, amplitude and phase positions, wherein a sound transmission pipe is arranged on the shell, and the sound transmission direction of the sound transmission pipe is the same as that of a tail pipe.
In some embodiments: the number of the sound transmission pipes is the same as that of the tail pipes, and the distance between the sound transmission pipes and the tail pipes is 100-200 mm.
In some embodiments: the front silencer, the rear silencer and the sounder are all provided with rubber cushions, and the front silencer, the rear silencer and the sounder are hung on a vehicle chassis through the rubber cushions.
A second aspect of the embodiments of the present application provides a method for personalized sound wave acceleration, including the following steps:
acquiring original exhaust sound emitted by a silencer assembly connected with an engine by using a controller, and performing Fourier transform to generate an original sound frequency spectrum;
the controller amplifies or inhibits the original sound frequency spectrum to obtain a plurality of accelerated sound wave frequency spectrums;
and receiving the accelerated sound wave frequency spectrum sent by the controller by using a sound generator, and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides an exhaust system and a method with personalized sound wave acceleration, and the exhaust system is provided with a silencer assembly which is used for being connected with an engine and emitting original exhaust sound; the controller is used for acquiring original exhaust sound, performing Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifying or suppressing the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum; and the sound generator is used for receiving the accelerated sound wave frequency spectrum sent by the controller and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
Therefore, the exhaust system of the application is additionally provided with the controller and the sound generator on the basis of the original silencer assembly, the controller firstly obtains original exhaust sound emitted by the original silencer assembly, carries out Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifies or inhibits amplitude of each order of the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum which is favored by user groups. The controller sends the accelerated sound wave frequency spectrum to the sounder, and the sounder sends out sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound according to the accelerated sound wave frequency spectrum. So, the user can select exhaust system's acoustic mode by oneself according to self demand, has improved the degree of participation that the user drove the in-process, has promoted and has driven the enjoyment, and then has improved user experience effectively.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of the present application;
FIG. 2 is a schematic structural view of a muffler assembly and sound generator according to an embodiment of the present application;
fig. 3 is a view of an order slice of the spectrum of the accelerated acoustic waves according to the embodiment of the present application.
Reference numerals:
1. a pre-muffler; 2. a rear muffler; 3. a tail pipe; 4. a sound generator; 5. a sound transmission tube; 6. a rubber cushion.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides an exhaust system and method with personalized sound wave acceleration, and the exhaust system and method can solve the problems that in the related technology, the exhaust sound of the exhaust system is single, and the personalized driving experience requirements of different users cannot be met.
Referring to fig. 1 and 3, in a first aspect, an embodiment of the present application provides an exhaust system with personalized sound wave acceleration, including:
a muffler assembly for attachment to the engine and for emitting the raw exhaust sound produced by the engine. The muffler assembly suppresses the sound pressure amplitude of the original exhaust sound produced by the engine, which fails to meet the sound pressure level required for user driving.
The controller is preferably a traveling computer and is connected with a finished automobile CAN network, and the controller acquires original exhaust sound emitted by the muffler assembly of the engine at a set rotating speed and load through the finished automobile CAN network. And fourier transforming the acquired original exhaust sound to generate an original sound spectrum comprising vibration signals of various orders, e.g., 2, 4, 6 order spectral signals.
After the controller acquires the original sound frequency spectrum, the original sound frequency spectrum needs to be amplified or suppressed according to the preference of a user group to obtain an accelerated sound wave frequency spectrum, the sound pressure amplitudes of the frequency spectrum signals of the 2 nd order, the 4 th order and the 6 th order of the original sound frequency spectrum can be amplified, and the sound pressure levels of the 2.5 th order, the 4.5 th order and the 5 th order near the 4 th order are also amplified in a relatively prominent manner, so that the sound with the frequency characteristics has a good dynamic sound wave effect.
The accelerating sound wave frequency spectrum can be provided with various modes according to actual needs and stored in the controller, the controller is connected with the human-computer interaction device, and the human-computer interaction device is in wireless communication connection with the controller through a wireless gateway. The human-computer interaction device is provided with a selection control for displaying the accelerated sound wave frequency spectrum mode, the accelerated sound wave frequency spectrum mode selected by the user is sent to the controller, and the controller can send out the audio signal of the selected accelerated sound wave frequency spectrum to the sounder 4 according to the selection of the user.
The controller is provided with a main switch connected with a whole vehicle battery, the whole vehicle battery supplies power to the controller through the main switch, when the main switch is turned on and acquires an engine ignition signal through a whole vehicle CAN network, the controller enables the engine ignition signal to the controller, and the controller acquires the acceleration sound wave frequency spectrum sent by the engine to the sounder 4 in a self-adaptive manner in a set rotating speed and load signal and an acceleration sound wave frequency spectrum mode selected by the human-computer interaction device through the whole vehicle CAN network.
And the sounder 4 is used for receiving the accelerated sound wave frequency spectrum sent by the controller, and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
The sound generator 4 and the muffler assembly are physically separated from each other, but acoustically connected to each other, and the sound of the muffler assembly and the sound of the sound generator 4 are spatially superimposed on each other to form the final subjective sound of the human ear. The method specifically comprises the following steps: the sound signal of each order of the original exhaust sound emitted by the sound eliminator assembly is amplified or suppressed to obtain an accelerated sound wave frequency spectrum, and the sound eliminator 4 receives the accelerated sound wave frequency spectrum emitted by the controller and then emits sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound to obtain sound with specific frequency or sound with partial frequency.
The exhaust system of the embodiment of the application not only can have the exhaust sound with the original noise reduction effect when the controller is closed, but also can realize the effect of exhausting and accelerating the sound waves of the traditional fuel vehicle when the controller is opened; the controller stores a plurality of acoustic schemes and realizes the switching of different sound wave schemes. The individuation of the exhaust system is characterized in that the exhaust system can be manually opened or closed, different sound wave effects can be selected according to the preference, and meanwhile, the system can update the sound wave effects through software upgrading of the controller.
In some alternative embodiments: referring to fig. 2, the application embodiment provides an exhaust system with personalized sound wave acceleration, a muffler assembly of the exhaust system comprises a front muffler 1 and a rear muffler 2 which are connected with an engine, the front muffler 1 and the rear muffler 2 are connected with each other, two tail pipes 3 are arranged on the rear muffler 2, and a controller acquires original exhaust sound emitted by the tail pipes 3. The front silencer 1, the rear silencer 2 and the sounder 4 are respectively provided with a rubber cushion 6, and the front silencer 1, the rear silencer 2 and the sounder are hung on a vehicle chassis through the rubber cushions 6.
The controller obtains the original exhaust sound emitted by the tail pipe 3, then performs Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifies or suppresses the sound pressure amplitude of each order of the original sound frequency spectrum under the condition of not changing the rotating speed and the frequency conversion of the original sound frequency spectrum to obtain the accelerated sound wave frequency spectrum required by a customer group, so that the sound signal emitted by the sound generator 4 and emitting the corresponding frequency, amplitude and phase is closer to the sound emitted by the silencer assembly.
In some alternative embodiments: referring to fig. 2, the application embodiment provides an exhaust system with personalized sound wave acceleration, and a sound generator 4 of the exhaust system comprises a shell and a sound horn positioned in the shell and used for generating sound signals with corresponding frequency, amplitude and phase, wherein the sound horn is connected with a controller through a wiring harness. The shell is provided with a sound transmission pipe 5, and the sound transmission direction of the sound transmission pipe 5 is the same as that of the tail pipe 3. The number of the sound transmission pipes 5 and the tail pipes 3 is the same, and the distance between the sound transmission pipes 5 and the tail pipes 3 is 100-200 mm.
In the embodiment of the application, at a position (microphone test position) 1.8m away from the vehicle, a typical sound wave acceleration is defined as that the sound pressure level of the 4 th order noise in a full rotation speed band is outstanding and is greater than 70db (a), the sound pressure levels of the 2 nd order, the 2.5 th order, the 4.5 th order and the 5 th order near the 4 th order are also outstanding relatively and are at least half of the rotation speed above 70db (a) in the full rotation speed band, and the sound with the frequency characteristic has a good dynamic sound wave effect.
A second aspect of the embodiments of the present application provides a method for personalized sound wave acceleration, including the following steps:
And 2, amplifying or inhibiting the original sound frequency spectrum by the controller to obtain various accelerated sound wave frequency spectrums.
And 3, receiving the accelerated sound wave frequency spectrum sent by the controller by using a sound generator, and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
According to the method for personalized sound wave acceleration, the controller is used for obtaining original exhaust sound emitted by the silencer assembly, and Fourier transform is performed to generate an original sound frequency spectrum. The original sound frequency spectrum needs to be amplified or suppressed according to the preference of the user group to obtain an accelerated sound wave frequency spectrum, and the amplitude and the frequency of the accelerated sound wave frequency spectrum can be modulated according to the individuation of the user group.
For example, the sound pressure amplitudes of the 2 nd order, 4 th order and 6 th order frequency spectrum signals of the original sound spectrum can be amplified, and the 2.5 th order, 4.5 th order and 5 th order sound pressure levels near the 4 th order are also amplified in a relatively prominent manner, so that the sound with the frequency characteristic has a good dynamic sound wave effect.
The accelerated sound wave frequency spectrum can be generated into various modes according to actual needs and stored in the controller, the controller can be connected with the human-computer interaction device, and the human-computer interaction device is in wireless communication connection with the controller through a wireless gateway. The human-computer interaction device is provided with a selection control for displaying the accelerated sound wave frequency spectrum mode, the accelerated sound wave frequency spectrum mode selected by the user is sent to the controller, and the controller can send out the selected accelerated sound wave frequency spectrum audio signal to the sounder 4 according to the selection of the user.
According to the method for individually accelerating the sound waves, the sound generator 4 and the silencer assembly are separated from each other in physical space, but are correlated with each other in acoustic space, and the sound of the silencer assembly and the sound of the sound generator 4 are overlapped with each other in space to form the final subjective sound of human ears. The method specifically comprises the following steps: the sound signal of each order of the original exhaust sound emitted by the sound eliminator assembly is amplified or suppressed to obtain an accelerated sound wave frequency spectrum, and the sound eliminator 4 receives the accelerated sound wave frequency spectrum emitted by the controller and then emits sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound to obtain sound with specific frequency or sound with partial frequency.
The exhaust system of the embodiment of the application not only can have the exhaust sound with the original noise reduction effect when the controller is closed, but also can realize the effect of exhausting and accelerating the sound waves of the traditional fuel vehicle when the controller is opened; the controller stores a plurality of acoustic schemes and realizes the switching of different sound wave schemes. The individuation of the exhaust system is characterized in that the exhaust system can be manually opened or closed, different sound wave effects can be selected according to the preference, and meanwhile, the system can update the sound wave effects through software upgrading of the controller.
Principle of operation
The embodiment of the application provides an exhaust system and a method with personalized sound wave acceleration, and the exhaust system is provided with a silencer assembly which is used for being connected with an engine and emitting original exhaust sound; the controller is used for acquiring original exhaust sound, performing Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifying or suppressing the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum; and the sounder 4 is used for receiving the accelerated sound wave frequency spectrum sent by the controller and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
Therefore, the exhaust system of the application is additionally provided with the controller and the sound generator 4 on the basis of the original silencer assembly, the controller firstly obtains original exhaust sound emitted by the original silencer assembly, carries out Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifies or inhibits amplitude of each order of the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum which is favored by a user group. The controller sends the accelerated sound wave frequency spectrum to the sound generator 4, and the sound generator 4 generates sound signals with corresponding frequency, amplitude and phase according to the accelerated sound wave frequency spectrum and superposes the sound signals with original exhaust sound.
So, the user can select exhaust system's multiple acoustic mode by oneself according to self demand, has improved the degree of participation that the user drove the in-process, has promoted and has driven the enjoyment, and then has improved user experience effectively.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, 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 (10)
1. An exhaust system with individualized acoustic wave acceleration, comprising:
a muffler assembly for coupling to an engine and emitting a raw exhaust sound;
the controller is used for acquiring original exhaust sound, performing Fourier transform on the original exhaust sound to generate an original sound frequency spectrum, and amplifying or suppressing the original sound frequency spectrum to obtain an accelerated sound wave frequency spectrum;
and the sound generator (4) is used for receiving the accelerated sound wave frequency spectrum emitted by the controller and emitting sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
2. An exhaust system with individualized acoustic wave acceleration as set forth in claim 1, wherein:
the controller is connected with a whole vehicle CAN network, and the controller acquires original exhaust sound emitted by the muffler assembly of the engine under set rotating speed and load through the whole vehicle CAN network.
3. An exhaust system with individualized acoustic wave acceleration as set forth in claim 1, wherein:
the controller is connected with a whole vehicle CAN network, and the controller acquires an engine ignition signal through the whole vehicle CAN network and then sends an acceleration sound wave frequency spectrum to the sounder (4) according to the engine at a set rotating speed and a set load.
4. An exhaust system with individualized acoustic wave acceleration as set forth in claim 1, wherein:
the controller amplifies or suppresses an original sound frequency spectrum to obtain a plurality of accelerated sound wave frequency spectrums and stores the accelerated sound wave frequency spectrums, the controller is connected with a human-computer interaction device, and the human-computer interaction device is in communication connection with the controller through a wireless gateway;
the man-machine interaction device is provided with a selection control for displaying the acceleration sound wave frequency spectrum mode, and the acceleration sound wave frequency spectrum mode selected by the user is sent to the controller.
5. An exhaust system with individualized acoustic wave acceleration as set forth in claim 1, wherein:
the controller is equipped with the master switch of connecting whole car battery, master switch is used for controlling the controller to open or break off, the controller is the driving computer.
6. An exhaust system with individualized acoustic wave acceleration as set forth in claim 1, wherein:
the muffler assembly comprises a front muffler (1) connected with an engine, the front muffler (1) is connected with a rear muffler (2), the rear muffler (2) is provided with a tail pipe (3), and the controller acquires the original exhaust sound emitted by the tail pipe (3).
7. An exhaust system with individualized acoustic wave acceleration as set forth in claim 6, wherein:
the sounder (4) comprises a shell and a sounding horn which is positioned in the shell and used for emitting sound signals corresponding to frequency, amplitude and phase positions, wherein a sound transmission pipe (5) is arranged on the shell, and the sound transmission direction of the sound transmission pipe (5) is the same as that of the tail pipe (3).
8. An exhaust system with individualized acoustic wave acceleration as set forth in claim 7, wherein:
the number of the sound transmission pipes (5) is the same as that of the tail pipes (3), and the distance between the sound transmission pipes (5) and the tail pipes (3) is 100-200 mm.
9. An exhaust system with individualized acoustic wave acceleration as set forth in claim 6, wherein:
all be equipped with rubber cushion (6) on pre-silencer (1) and back silencer (2) and sounder (4), pre-silencer (1) and back silencer (2) and sounder (4) pass through rubber cushion (6) hang on vehicle chassis.
10. A method with personalized accelerating of sound waves, characterized in that it comprises the following steps:
acquiring original exhaust sound emitted by a silencer assembly connected with an engine by using a controller, and performing Fourier transform to generate an original sound frequency spectrum;
the controller amplifies or inhibits the original sound frequency spectrum to obtain a plurality of accelerated sound wave frequency spectrums;
and receiving the accelerated sound wave frequency spectrum sent by the controller by using a sound generator, and sending sound signals with corresponding frequency, amplitude and phase to be superposed with the original exhaust sound.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116044543A (en) * | 2023-01-17 | 2023-05-02 | 重庆长安汽车股份有限公司 | Exhaust sound quality adjusting system, method and vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044543A (en) * | 2023-01-17 | 2023-05-02 | 重庆长安汽车股份有限公司 | Exhaust sound quality adjusting system, method and vehicle |
| CN116044543B (en) * | 2023-01-17 | 2024-04-09 | 重庆长安汽车股份有限公司 | Exhaust sound quality adjusting system, method and vehicle |
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