CN111749754B - Exhaust system sound quality adjusting device and method - Google Patents
Exhaust system sound quality adjusting device and method Download PDFInfo
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- CN111749754B CN111749754B CN201910239904.2A CN201910239904A CN111749754B CN 111749754 B CN111749754 B CN 111749754B CN 201910239904 A CN201910239904 A CN 201910239904A CN 111749754 B CN111749754 B CN 111749754B
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Classifications
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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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/20—Silencing apparatus characterised by method of silencing by using movable parts having oscillating or vibrating movement
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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
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides an exhaust system sound quality adjusting device which comprises a sound producing shell, a connecting pipe and a vibrating device, wherein the sound producing shell is arranged on an exhaust tail pipe and internally comprises a containing cavity, the connecting pipe is used for connecting the sound producing shell and the exhaust tail pipe, the vibrating device moves up and down in the containing cavity, the vibrating device comprises a vibrating plate capable of moving up and down and vibrating and an adjusting plate which is telescopically arranged at the opposite end of the same side of the vibrating plate, the vibrating plate is close to the top end of the sound producing shell, the tail end of the adjusting plate abuts against the bottom of the sound producing shell, and a resonant cavity is formed by the vibrating plate, the adjusting plate and the inner wall of the sound producing shell. The invention also relates to a method for adjusting the sound quality of the exhaust system, which can timely and accurately control and adjust the vibration frequency of the vibration cavity by controlling the vibration and the up-and-down movement of the vibration plate, realize the functions of compensating sound and silencing, improve the sound quality of the exhaust system, and solve the problems of suddenly reduced sound pressure, inadequately pleasant sound pressure and the like when the exhaust noise of the fuel vehicle rises along with the rotation speed of the engine.
Description
Technical Field
The invention relates to the field of vehicle bodies, in particular to an exhaust system sound quality adjusting device and method.
Background
Along with the improvement of the living standard of people, the requirements of people on the whole car are changed from original riding instead of walking tools to comfortable household necessities, so that the requirements on the sound quality of the whole car are improved except that the dynamic requirements on the car type are strict, and the noise optimization of the whole car in the running and accelerating processes is particularly important. The exhaust system is used as an important component of the automobile, and the exhaust system discharges exhaust gas and brings combustion noise to the tail of the automobile, so that high-order noise and friction noise with high sound pressure level can be generated at the tail of the automobile, the noise is transmitted to the passenger cabin, and the acoustic cavity mode of the passenger cabin is most likely to be excited to cause the resonance of the acoustic cavity of the passenger cabin, so that the NVH of the whole automobile is seriously affected.
At present, most vehicle models are not provided with exhaust system sound quality adjusting devices, and even if some vehicle models are provided with electromagnetic valves, the electromagnetic valves mainly reduce back pressure and flow noise and cannot compensate sound loss at certain rotating speeds; some vehicle models use front-end exhaust pulsation as excitation and utilize resonant cavity resonance to compensate exhaust sound, but the sound quality compensation device can only compensate sound at touch rotation speed or frequency, can not change along with the change of the rotation speed or frequency to compensate sound at different frequencies, and can not adjust the amplitude of sound, so that sound quality adjustment is limited.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an exhaust system sound quality adjusting apparatus and method capable of improving the noise quality of the entire vehicle.
The invention provides an exhaust system sound quality adjusting device which comprises a sound producing shell, a connecting pipe and a vibrating device, wherein the sound producing shell is arranged on an exhaust tail pipe and internally comprises a containing cavity, the connecting pipe is used for connecting the sound producing shell and the exhaust tail pipe, the vibrating device moves up and down in the containing cavity, the vibrating device comprises a vibrating plate capable of moving up and down and vibrating and an adjusting plate which is telescopically arranged at the opposite end of the same side of the vibrating plate, the vibrating plate is close to the top end of the sound producing shell, the tail end of the adjusting plate is fixedly connected with the bottom of the sound producing shell, and the vibrating plate, the adjusting plate and the inner wall of the sound producing shell jointly form a resonant cavity.
Further, the adjusting plate is driven to stretch up and down when the vibrating plate moves up and down, so that the vibration frequency of the resonant cavity is changed; and the vibrating plate drives the resonant cavity to vibrate when vibrating.
Further, the sound-emitting housing comprises a first housing body and a second housing body, the first housing body comprises a first open end and a first closed end, the second housing body comprises a second open end and a second closed end, and the first open end is assembled at the second open end and forms a closed accommodating cavity together with the first closed end and the second closed end.
Further, the vibration plate is close to the second closed end, the adjusting plate is a bent vibration reed, and the tail end of the adjusting plate is fixedly connected with the first closed end.
Further, in the initial state, the vibration plate is abutted against the inner surface of the second closed end.
Further, a first through hole is formed in the first closed end, one end of the connecting pipe penetrates through the first through hole and is fixedly connected to the inner wall of the first through hole, and the other end of the connecting pipe is connected to the tail pipe.
Further, a second through hole is formed in the second closed end, and the exhaust system sound quality adjusting device further comprises a push rod welded to the vibrating plate and penetrating through the second through hole, and a controller for controlling the push rod to move up and down and vibrate.
Further, the installation hole is arranged on the controller, the push rod is sleeved in the installation hole, and the bottom end of the controller is fixedly connected with the second closed end on the second shell.
Further, the controller is a vibration excitation controller capable of controlling the push rod to move up and down and vibrate in the second through hole according to a frequency control signal corresponding to the noise frequency and the vibration amplitude transmitted by the ECU.
The invention also provides a method for adjusting the sound quality of the exhaust system, which comprises the following steps of adjusting the sound quality of the tail pipe by using the device for adjusting the sound quality of the exhaust system:
the ECU judges whether the tail pipe needs sound compensation or not according to the frequency and amplitude of the noise at the rotating speed;
when the ECU judges that the tail pipe does not need sound compensation, the resonant cavity and the connecting pipe form a muffler, and the controller controls the vibrating plate to move up and down according to a muffling frequency command signal obtained by ECU analysis, so that the muffling frequency of the resonant cavity is changed;
when the ECU judges that the tail pipe needs to be subjected to sound compensation, the ECU transmits a control signal corresponding to the target frequency and the target amplitude of the sound compensation to the controller, the controller controls the push rod to move the vibrating plate up and down to a specific position according to the control signal, the vibration frequency of the resonant cavity is adjusted to a first frequency, the controller further controls the push rod to drive the vibrating plate to vibrate at the first frequency according to the control signal, the resonant cavity resonates to sound, and the sound is transmitted to the tail pipe through the connecting pipe, so that the sound compensation is completed. .
In summary, the sound-producing shell with the accommodating cavity inside is connected to the tail pipe through the connecting pipe, the vibrating plate capable of vibrating and moving up and down and the adjusting plate stretching up and down along with the vibrating plate are distributed in the accommodating cavity, and meanwhile, the vibration frequency of the vibrating cavity is timely and accurately adjusted by controlling the vibration and the moving up and down of the vibrating plate, so that the functions of compensating sound and silencing are achieved, and the sound quality of an exhaust system is improved.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an apparatus and method for adjusting the sound quality of an exhaust system according to the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 4 is a schematic view of the structure of the first closed end of the first housing of the sound housing of FIG. 1;
FIG. 5 is a schematic illustration of the structure of a second closed end of the second housing of the sound housing of FIG. 1;
FIG. 6 is a schematic diagram of the vibrating device of FIG. 1 and a push rod pushing the vibrating device up and down;
fig. 7 is a schematic view of a controller for controlling the up-and-down movement and vibration of the push rod in fig. 1.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description of the present invention is given with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 to 7, the present invention provides an exhaust system sound quality adjusting apparatus including a sound emitting housing 10 mounted on a tail pipe 20 and including a receiving chamber 100 therein, a connection pipe 30 connecting the sound emitting housing 10 and the tail pipe 20, and a vibration device 40 (refer to fig. 1, 2 and 3 with emphasis on) moving up and down in the receiving chamber 100 to adjust an output sound pressure amplitude transmitted to the tail pipe 20.
The vibration device 40 comprises a vibration plate 41 capable of moving up and down (sliding back and forth up and down) and vibrating, and an adjusting plate 42 telescopically arranged at the opposite end of the same side of the vibration plate 41, wherein the vibration plate 41 is close to the top end of the sounding housing 10, the tail end of the adjusting plate 42 is fixedly connected to the bottom of the sounding housing 10, and the vibration plate 41, the adjusting plate 42 and the inner wall of the sounding housing 10 jointly form a resonant cavity 400, so that the smooth change of the vibration frequency of the resonant cavity 400 is ensured. In a preferred embodiment, the adjusting plate 42 is fixedly connected to the vibration plate 41 by welding, riveting or the like.
When the tail pipe 20 does not need sound compensation, the adjusting plate 42 is driven to synchronously extend up and down by the up-and-down movement of the vibrating plate 41, and the vibration frequency of the resonant cavity 400 is changed to change the noise elimination frequency, so that noise is reduced or eliminated; when the tail pipe 20 needs to be compensated, the vibration frequency of the resonant cavity 400 is changed and maintained according to the noise frequency, and the vibration of the vibration plate 41 moves relatively weak up and down relative to the vibration plate 41, so that the vibration of the vibration plate 41 is further controlled to cause the resonance sound of the resonant cavity 400, and the sound compensation of the tail pipe 20 is realized.
Specifically, referring to fig. 4 and 5 together, the sound-emitting housing 10 includes a first housing 11 and a second housing 12, the first housing 11 including a first open end and a first closed end 11a, the second housing 12 including a second open end and a second closed end 12a, the first open end being fitted to the second open end and forming a closed receiving chamber 100 together with the first closed end 11a and the second closed end 12a. In a preferred embodiment, the first housing 11 and the second housing 12 are square box-like structures, and the first housing 11 is a bottom cover welded to the second open end of the second housing 12.
In the present invention, the first closed end 11a is provided with a first through hole 111, and one end of the connection pipe 30 passes through the first through hole 111 and is fixedly connected to the inner wall of the first through hole 111, while the other end is connected to the tail pipe 20.
The second closed end 12a is provided with a second through hole 112; correspondingly, as shown in fig. 3, 6 and 7, the exhaust system sound quality adjusting device further comprises a push rod 51 welded to the vibration plate 41 and penetrating through the second through hole 112, and a controller 52 for controlling the push rod 51 to move up and down and vibrate, wherein the controller 52 controls the push rod 51 to move up and down and vibrate to drive the vibration plate 41 to move up and down (the controller 52 controls the push rod 51 to move up and down to drive the vibration plate 41 to move up and down, and the controller 52 controls the push rod 51 to vibrate to drive the vibration plate 41 to vibrate), so as to drive the resonance of the resonant cavity 400, and the control is accurate and the response is timely. In a preferred embodiment, the push rod 51 is a cylindrical solid rod and is located at the center of the vibration plate 41, and the controller 52 is a vibration excitation controller capable of controlling up-and-down movement and vibration of the push rod 51 in the second through hole 112 according to a frequency control signal corresponding to the frequency of noise and the vibration amplitude transmitted from the ECU.
Further, according to the present invention, the controller 52 is provided with the mounting hole 52a, the push rod 51 is sleeved in the mounting hole 52a, and the bottom end of the controller 52 is fixedly connected (welded) to the second closed end 12a of the second casing 12.
In the invention, the vibration plate 41 is close to the second closed end 12a, the adjusting plate 42 is a curved vibration reed, the tail end of the adjusting plate is fixedly connected (welded) to the first closed end 11a, the volume of the resonant cavity 400 is changed under the action of the telescopic vibration reed and the vibration plate 41 capable of vibrating and moving up and down, the vibration frequency of the resonant cavity 400 is adjusted, the volume change is rapid, the efficiency is high, the sound adjustment and the excitation of the resonant cavity 400 are convenient, and the noise quality of the whole vehicle is improved.
In a preferred embodiment of the present invention, in an initial state when the vibration device 40 and the sound-emitting housing 10 formed by the vibration plate 41 and the adjustment plate 42 are installed, the upper surface of the vibration plate 41 abuts against the inner surface of the second closed end 12a, and at this time, the height of the vibration device 40 is slightly greater than or just equal to the height of the accommodating cavity 100 in the sound-emitting housing 10, so that the adjustable vibration frequency range of the resonant cavity 400 is maximized. Naturally, in other embodiments, the relative positions of the vibration plate 41 and the second closed end 12a can be adjusted as desired.
The invention controls the up-and-down motion and vibration of the push rod 51 through the controller 52 to drive the vibration plate 41 to move up and down and vibrate, and further drive the adjusting plate 42 to stretch up and down along with the vibration plate 41, thereby achieving the purposes of changing the volume of the resonant cavity 400 and changing the vibration frequency of the resonant cavity 400. Specifically, the push rod 51 moves downward, the vibration plate 41 moves downward, the adjustment plate 42 compresses downward, and the vibration frequency of the resonant cavity 100 becomes small; the push rod 51 moves upward, the vibration plate 41 moves upward, the adjustment plate 42 extends upward, and the vibration frequency of the resonance chamber 400 becomes large, that is, the frequency of the resonance chamber 400 is inversely proportional to the volume size.
The present invention also provides a method for adjusting the sound quality of an exhaust system, which includes a method for adjusting the sound quality of a tail pipe 20 by using an exhaust system sound quality adjusting device, specifically comprising the following steps:
the ECU judges whether the tail pipe 20 needs sound compensation according to the frequency and amplitude of the noise at the rotation speed;
when the ECU judges that the tail pipe 20 does not need sound compensation, the resonant cavity 400 and the connecting pipe 30 form a muffler, and the controller 52 controls the vibration plate 41 to move up and down according to the muffling frequency command signal obtained by ECU analysis, so that the muffling frequency of the resonant cavity 400 is changed, and the noise at a specific frequency is reduced;
when the ECU determines that the tailpipe 20 needs to be compensated for sound, the ECU transmits a control signal corresponding to a target frequency and a target amplitude of the sound compensation to the controller 52, and the controller 52 controls the push rod 51 to move the vibration plate 41 up and down to a specific position (at this time, the adjusting plate 42 is compressed to a specific position to ensure that the volume of the resonant cavity 400 is unchanged) according to the control signal, so as to adjust (change) the vibration frequency of the resonant cavity 400 to a first frequency, and simultaneously, the controller 52 further controls the push rod 51 to vibrate according to the control signal, so as to drive the vibration plate 41 to vibrate at the first frequency, at this time, the resonant cavity 400 resonates to sound, and the sound is transmitted to the tailpipe 20 through the connecting pipe 30, so that the sound compensation is completed.
The sound pressure amplitude output by the exhaust system sound quality regulating device to the tail pipe is adjustable, and the sound frequency and amplitude to be compensated can be timely regulated according to the change of the rotating speed and the noise frequency, so that the noise under each rotating speed and the noise frequency can be better compensated, and the working frequency range of the exhaust system sound quality regulating device is greatly improved; it is also possible to reduce noise at a specific frequency by adjusting the mode of the resonant cavity 400 (acoustic cavity) without applying vibration excitation to make it a muffler when the compensation of sound is not required.
The exhaust system sound quality adjusting device and method provided by the invention are used for solving the problems that the sound pressure suddenly drops and is not pleasant enough when the exhaust noise of the fuel vehicle rises along with the rotation speed of the engine, improving the sound quality of the exhaust system and providing better exhaust sound for the whole vehicle.
In summary, the sound-producing housing with the accommodating cavity therein is connected to the tail pipe through the connecting pipe, the vibrating plate capable of vibrating and moving up and down and the adjusting plate stretching up and down along with the vibrating plate are distributed in the accommodating cavity, meanwhile, the up-and-down movement and the vibration of the push rod fixedly connected with the vibrating plate are controlled through the controller, the vibration and the up-and-down movement of the vibrating plate are controlled, and the vibration frequency of the vibrating cavity is timely and accurately adjusted, so that the functions of compensating sound and silencing are realized, and the sound quality of an exhaust system is improved.
The present invention is not limited to the above embodiments, but is capable of modification and variation in all aspects, including those of ordinary skill in the art, without departing from the spirit and scope of the present invention.
Claims (8)
1. The sound quality adjusting device for the exhaust system is characterized by comprising a sound producing shell (10) which is arranged on an exhaust tail pipe (20) and internally comprises a containing cavity (100), a connecting pipe (30) which is used for connecting the sound producing shell (10) and the exhaust tail pipe (20), and a vibrating device (40) which moves up and down in the containing cavity (100), wherein the vibrating device (40) comprises a vibrating plate (41) which can move up and down and vibrate and an adjusting plate (42) which is telescopically arranged at the opposite end of the same side of the vibrating plate (41), the vibrating plate (41) is close to the top end of the sound producing shell (10), the tail end of the adjusting plate (42) is fixedly connected to the bottom of the sound producing shell (10), and the vibrating plate (41), the adjusting plate (42) and the inner wall of the sound producing shell (10) jointly form a resonant cavity (400);
the vibration plate (41) drives the adjusting plate (42) to stretch up and down when moving up and down, so that the vibration frequency of the resonant cavity (400) is changed; the vibrating plate (41) drives the resonant cavity (400) to vibrate when vibrating;
the exhaust system sound quality adjusting device further comprises a push rod (51) and a controller (52) for controlling the push rod (51) to move up and down and vibrate;
the controller (52) can control the push rod (51) to move up and down and vibrate according to frequency control signals corresponding to noise frequency and vibration amplitude transmitted by the ECU, and drives the vibration plate (41) to move up and down and vibrate.
2. The exhaust system sound quality adjustment device according to claim 1, characterized in that the sound emitting housing (10) comprises a first housing (11) and a second housing (12), the first housing (11) comprising a first open end and a first closed end (11 a), the second housing (12) comprising a second open end and a second closed end (12 a), the first open end fitting into the second open end.
3. The exhaust system sound quality adjusting apparatus according to claim 2, wherein the vibration plate (41) is adjacent to the second closed end (12 a), and the adjusting plate (42) is a curved vibration reed and has a distal end fixedly attached to the first closed end (11 a).
4. An exhaust system sound quality adjusting device according to claim 3, wherein in an initial state, the vibration plate (41) abuts against an inner surface of the second closed end (12 a).
5. The exhaust system sound quality adjusting device according to claim 2, wherein the first closed end (11 a) is provided with a first through hole (111), one end of the connecting pipe (30) passes through the first through hole (111) and is fixedly connected to the inner wall of the first through hole (111), and the other end is connected to the tail pipe (20).
6. The exhaust system sound quality adjusting device according to claim 5, wherein a second through hole (112) is provided in the second closed end (12 a), and the push rod (51) passes through the second through hole (112).
7. The exhaust system sound quality adjusting device according to claim 2, wherein the controller (52) is provided with a mounting hole (52 a), the push rod (51) is sleeved in the mounting hole (52 a), and the bottom end of the controller (52) is fixedly connected with the second closed end (12 a) on the second shell (12).
8. A method of adjusting an exhaust system sound quality adjusting device according to any one of claims 1 to 7, comprising the step of adjusting the sound quality of a tail pipe (20) by means of the exhaust system sound quality adjusting device:
the ECU judges whether the tail pipe (20) needs sound compensation or not according to the frequency and the amplitude of the noise at the rotating speed;
when the ECU judges that the tail pipe (20) does not need sound compensation, the resonant cavity (400) and the connecting pipe (30) form a muffler, and the controller (52) controls the vibrating plate (41) to move up and down according to a muffling frequency command signal obtained by ECU analysis, so that the muffling frequency of the resonant cavity (400) is changed;
when the ECU judges that the tail pipe (20) needs to be subjected to sound compensation, the ECU transmits a control signal corresponding to the target frequency and the target amplitude of the sound compensation to the controller (52), the controller (52) controls the push rod (51) to move the vibrating plate (41) up and down to a specific position according to the control signal, the vibration frequency of the resonant cavity (400) is adjusted to be the first frequency, the controller (52) further controls the push rod (51) to drive the vibrating plate (41) to vibrate at the first frequency according to the control signal, the resonant cavity (400) resonates and sounds, and the sound is transmitted to the tail pipe (20) through the connecting pipe (30) to finish the sound compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910239904.2A CN111749754B (en) | 2019-03-27 | 2019-03-27 | Exhaust system sound quality adjusting device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910239904.2A CN111749754B (en) | 2019-03-27 | 2019-03-27 | Exhaust system sound quality adjusting device and method |
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| CN111749754A CN111749754A (en) | 2020-10-09 |
| CN111749754B true CN111749754B (en) | 2023-08-15 |
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| CN201910239904.2A Active CN111749754B (en) | 2019-03-27 | 2019-03-27 | Exhaust system sound quality adjusting device and method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111828129B (en) * | 2019-04-15 | 2021-09-14 | 广州汽车集团股份有限公司 | Exhaust noise adjusting device and method, exhaust noise adjusting system and vehicle |
| CN113183750A (en) * | 2021-04-29 | 2021-07-30 | 东风汽车集团股份有限公司 | Structure for sounding by using automobile exhaust, control method thereof and exhaust system tail pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542263A (en) * | 2003-04-29 | 2004-11-03 | 海因里希・吉勒特有限责任公司 | Muffler with variable acoustic properties |
| DE102006042224B3 (en) * | 2006-09-06 | 2008-01-17 | J. Eberspächer GmbH & Co. KG | Active sound absorber for exhaust-gas system of internal-combustion engine particularly in motor vehicle, has anti sound generator comprises membrane drive, with which anti sound generator is coupled with external wall of sound absorber |
| CN201177562Y (en) * | 2008-03-31 | 2009-01-07 | 重庆长安汽车股份有限公司 | Frequency adjustable type air inlet silencing apparatus test device |
| CN102434337A (en) * | 2011-09-28 | 2012-05-02 | 奇瑞汽车股份有限公司 | Resonance silencer with dynamically adjusted silencing frequency |
| CN103114889A (en) * | 2011-10-14 | 2013-05-22 | J·埃贝斯佩歇合资公司 | Active sound absorbers |
| US9286882B1 (en) * | 2012-03-07 | 2016-03-15 | Great Lakes Sound & Vibration, Inc. | Systems and methods for active exhaust noise cancellation |
| CN209671048U (en) * | 2019-03-27 | 2019-11-22 | 广州汽车集团股份有限公司 | A kind of exhaust system sound quality regulating device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6792907B1 (en) * | 2003-03-04 | 2004-09-21 | Visteon Global Technologies, Inc. | Helmholtz resonator |
-
2019
- 2019-03-27 CN CN201910239904.2A patent/CN111749754B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542263A (en) * | 2003-04-29 | 2004-11-03 | 海因里希・吉勒特有限责任公司 | Muffler with variable acoustic properties |
| DE102006042224B3 (en) * | 2006-09-06 | 2008-01-17 | J. Eberspächer GmbH & Co. KG | Active sound absorber for exhaust-gas system of internal-combustion engine particularly in motor vehicle, has anti sound generator comprises membrane drive, with which anti sound generator is coupled with external wall of sound absorber |
| CN201177562Y (en) * | 2008-03-31 | 2009-01-07 | 重庆长安汽车股份有限公司 | Frequency adjustable type air inlet silencing apparatus test device |
| CN102434337A (en) * | 2011-09-28 | 2012-05-02 | 奇瑞汽车股份有限公司 | Resonance silencer with dynamically adjusted silencing frequency |
| CN103114889A (en) * | 2011-10-14 | 2013-05-22 | J·埃贝斯佩歇合资公司 | Active sound absorbers |
| US9286882B1 (en) * | 2012-03-07 | 2016-03-15 | Great Lakes Sound & Vibration, Inc. | Systems and methods for active exhaust noise cancellation |
| CN209671048U (en) * | 2019-03-27 | 2019-11-22 | 广州汽车集团股份有限公司 | A kind of exhaust system sound quality regulating device |
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| CN111749754A (en) | 2020-10-09 |
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