CN110735689A - Variable expansion ratio silencing postprocessor and vehicle using postprocessor - Google Patents
Variable expansion ratio silencing postprocessor and vehicle using postprocessor Download PDFInfo
- Publication number
- CN110735689A CN110735689A CN201810791985.2A CN201810791985A CN110735689A CN 110735689 A CN110735689 A CN 110735689A CN 201810791985 A CN201810791985 A CN 201810791985A CN 110735689 A CN110735689 A CN 110735689A
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- Prior art keywords
- exhaust
- pipe
- expansion ratio
- pipes
- exhaust pipes
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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
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention relates to kinds of variable expansion ratio silencing postprocessors and a vehicle using the postprocessors, the variable expansion ratio silencing postprocessors comprise a cylinder body with a front cover and a rear cover, an expansion cavity is arranged in the cylinder body, an exhaust pipe communicated with the expansion cavity is arranged on the rear cover, the diameter of the exhaust pipe is smaller than that of the expansion cavity, more than two exhaust pipes are arranged, a control valve used for controlling the opening or closing of at least exhaust pipes to adjust the expansion ratio between the exhaust pipe and the expansion cavity is further arranged on the cylinder body, and the opening and closing quantity of the exhaust pipes can be controlled to enable the silencing postprocessors to balance exhaust noise under various rotating speed working conditions, so that the exhaust noise under various rotating speed working conditions reaches a lower level, and the reduction of the exhaust noise under various rotating speed working conditions is.
Description
Technical Field
The invention relates to kinds of variable expansion ratio silencing after-treatment devices and vehicles using the after-treatment devices.
Background
In recent years, with the improvement of living standard of people, the requirement on the comfort of a passenger car is higher and higher, the passenger car body is longer, the mass is larger, so the passenger car is matched with a diesel engine like , and compared with a gasoline engine or other power sources, the diesel engine has the advantages of high output power and thermal efficiency and has the defect of high low-frequency radiation noise.
In the Chinese patent document with the publication number of CN203035307U, an integrated SCR catalytic conversion muffler for diesel engines is disclosed, which comprises a cylinder body, wherein a front end cover and a rear end cover are fixed at the front end and the rear end of the cylinder body, an air inlet end expansion cavity, a catalytic carrier and a tail end expansion cavity are sequentially and coaxially connected in series along exhaust airflow in the cylinder body, a tail pipe communicated with the tail end expansion cavity is also arranged on the rear end cover, the diameter of the tail pipe is smaller than that of the tail end expansion cavity, a cross-sectional area ratio of is arranged between the tail pipe and the tail end expansion cavity in the muffler, when the tail gas enters the tail pipe through the tail end expansion cavity, exhaust noise can generate a transmission loss of by the arrangement of the cross-sectional area ratio, and the transmission loss is only dependent on the cross-sectional area ratiom=s 2 /s 1 For a circular pipem=D 2 /d 2 ，DAnddrespectively, the diameter of the tail end expansion cavity and the diameter of the exhaust pipe. The transmission loss does not depend on the absolute value of the pipe cross-sectional area but on the ratio of the two pipe cross-sectional areas. The transmission loss has no relation with frequency, and the noise elimination purpose of the silencer is achieved through the arrangement of the ratio of the cross sections. However, this muffler can only perform sound attenuation processing for a case where the exhaust gas flow rate is large under medium and high load conditions, and low-frequency noise generated during exhaust cannot be completely eliminated when the exhaust gas flow rate of the engine is small at low speed or idling. There is no versatility for different speeds.
Disclosure of Invention
The invention aims to provide variable expansion ratio sound attenuation post-processors to solve the problem that a sound absorber in the prior art cannot meet the sound attenuation requirements under different vehicle speed states, and also aims to provide vehicles using the variable expansion ratio sound attenuation post-processors.
In order to achieve the purpose, the technical scheme of the variable expansion ratio silencing post processor is as follows:
the variable expansion ratio silencing postprocessor comprises a cylinder body with a front cover and a rear cover, wherein an expansion cavity is arranged in the cylinder body, an exhaust pipe communicated with the expansion cavity is arranged on the rear cover, the diameter of the exhaust pipe is smaller than that of the expansion cavity, more than two exhaust pipes are arranged, and a control valve used for controlling at least exhaust pipes to be opened or closed so as to adjust the expansion ratio between the exhaust pipe and the expansion cavity is further arranged on the cylinder body.
, in order to ensure the simple and compact structure of the post-processor on the basis of realizing the complete noise elimination control under different working conditions, two exhaust pipes are arranged on the rear end surface of the rear cover side by side at intervals, and the two exhaust pipes extend along the axial extension direction of the cylinder.
, realizing stable direct control, wherein the control valve is in control connection with exhaust pipes.
And , the control valve is normally closed to save energy consumption.
, in order to eliminate the noise of the exhaust with specific frequency, the tube bodies of two adjacent exhaust tubes are connected with a bridge tube for connecting the two exhaust tubes, wherein the end of the bridge tube is positioned in front of the end.
The technical scheme of the vehicle is as follows:
the vehicle comprises a vehicle body and a variable expansion ratio silencing postprocessor arranged on the vehicle body, wherein the variable expansion ratio silencing postprocessor comprises a cylinder body with a front cover and a rear cover, an expansion cavity is arranged in the cylinder body, an exhaust pipe communicated with the expansion cavity is arranged on the rear cover, the diameter of the exhaust pipe is smaller than that of the expansion cavity, the exhaust pipe is more than two, a control valve used for controlling at least exhaust pipes to be opened or closed to adjust the expansion ratio between the exhaust pipe and the expansion cavity is further arranged on the cylinder body, and a control module used for receiving an engine speed signal and connected with the control valve is further arranged on the vehicle body.
, in order to ensure the simple and compact structure of the post-processor on the basis of realizing the complete noise elimination control under different working conditions, two exhaust pipes are arranged on the rear end surface of the rear cover side by side at intervals, and the two exhaust pipes extend along the axial extension direction of the cylinder.
, realizing stable direct control, wherein the control valve is in control connection with exhaust pipes.
And , the control valve is normally closed to save energy consumption.
, in order to eliminate the noise of the exhaust with specific frequency, the tube bodies of two adjacent exhaust tubes are connected with a bridge tube for connecting the two exhaust tubes, wherein the end of the bridge tube is positioned in front of the end.
Compared with the prior art, the variable expansion ratio muffling postprocessor has the advantages that original exhaust pipes are arranged into more than two exhaust pipes, the control valve is adopted to control the opening and closing of at least exhaust pipes, so that the purpose of adjusting the ratio of the cross section of an expansion cavity to the cross section of the exhaust pipes, namely the ratio of the expansion ratio can be achieved by increasing or reducing the opening number of the exhaust pipes, the adjustment of the expansion ratio under different vehicle speeds can be further met, the opening number of the exhaust pipes can be reduced under the working conditions of low speed or idling, a small number of the exhaust pipes or only exhaust pipes are opened, the expansion ratio is large at the moment, the acoustic transmission loss is increased, the large transmission loss can improve the low-frequency muffling capacity of the whole postprocessor, the low-frequency noise of exhaust can be well controlled, the exhaust speed is high under the working conditions of medium speed and high speed, the large friction noise can be caused, the opening number of the exhaust pipes is increased, the large number of the exhaust pipes or all the exhaust pipes are opened, the exhaust pipes can be small, a large amount of exhaust gas can be discharged from the exhaust pipes, the exhaust pipe can be greatly reduced, the exhaust friction noise can be greatly improved, the noise of a comfortable working condition of a passenger can be controlled, and the exhaust pipe can be more easily controlled, the exhaust noise of the exhaust pipe can be reduced, and the exhaust noise of various exhaust pipe can be more balanced noise of a passenger can be achieved, and the exhaust.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a variable expansion ratio muffler post-processor according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a view taken along line A of FIG. 2;
FIG. 4 is a schematic representation of the muffled frequency band before and after use of the post-processor of the present invention;
FIG. 5 is a graph comparing the muffler effect of the aftertreatment device of the present invention with a prior art single port exhaust muffler;
FIG. 6 is a graph comparing the sound damping effect of a single port exhaust of the present invention with that of a prior art after the aftertreatment device incorporates active control.
Description of reference numerals: 1-a cylinder body; 2-an air inlet connecting pipe; 3-a post-processor control module; 4-an exhaust pipe; 5-bridging pipes; 6-air inlet perforated pipe; 7-a catalytic support; 11-an inlet end expansion chamber; 12-a catalytic conversion chamber; 13-caudal expansion of the lumen.
Detailed Description
Embodiments of the present invention are further illustrated in below with reference to the drawings.
The specific embodiment of the variable expansion ratio sound attenuation postprocessor related to the invention is mainly applied to the exhaust sound attenuation of the diesel engine matched with the passenger car at present as shown in fig. 1 to 6, and of course, in other embodiments, the postprocessor can also be applied to other exhaust emission sound attenuation and noise reduction processes according to actual conditions. The post processor comprises a cylinder body 1, wherein a front cover and a rear cover are respectively connected to the front end and the rear end of the cylinder body 1 in the axial direction, so that the cylinder body 1 is integrally formed into a closed cavity structure. Meanwhile, in this embodiment, the cylinder 1 is a cylindrical structure and is a mounting carrier for other components, and in other embodiments, the specific structure of the cylinder 1 is not limited, and those skilled in the art can design arbitrarily according to actual needs.
The barrel 1 is internally provided with three parts which are respectively an air inlet end expansion cavity 11, a catalytic conversion cavity 12 and a tail end expansion cavity 13 along the coaxial series connection of the flowing direction of tail gas airflow, and two adjacent cavities are separated by corresponding partition plate structures.
For the air inlet end expansion cavity 11, the upper end of the side wall of the air inlet end expansion cavity is provided with an inner through hole and an outer through hole, the air inlet perforated pipe 6 penetrates through the through hole, the end of the air inlet perforated pipe 6 extends into the air inlet end expansion cavity 11, the end extends out of the cylinder body 1, the outer side of the cylinder body 1 is provided with an air inlet connecting pipe 2 connected with the air inlet perforated pipe 6, the pipe wall of the air inlet perforated pipe 6 located in the air inlet end expansion cavity 11 is provided with a plurality of small holes for tail gas to pass through, and partial high-frequency noise is eliminated when the tail gas passes through the small holes.
Regarding the catalytic conversion chamber 12, in this embodiment, it is disposed at the rear side of the inlet end expansion chamber 11, the catalytic conversion chamber 12 is provided with the catalytic carrier 7 therein, the catalytic carrier 7 is a honeycomb-shaped porous SCR carrier, the above-mentioned exhaust gas passing through the pores passes through the catalytic carrier 7 after being rectified by the inlet end expansion chamber 11, the harmful gas NOX in the exhaust gas passes through the catalytic carrier 7 and reacts with the catalytic carrier 7 and is reduced to harmless gas, and then enters the tail end expansion chamber 13, wherein the specific structure and working principle of the catalytic carrier 7 are similar to those of the prior art , and are not expanded in detail.
In the embodiment, the rear cover is provided with an exhaust pipe 4 communicated with the tail end expansion chamber 13 in a penetrating way, the tail gas is rectified by the tail end expansion chamber 13 and then is exhausted to the outside through the exhaust pipe 4, and in the process, the diameter of the exhaust pipe 4 is smaller than that of the tail end expansion chamber 13, so that the transmission loss is caused by the generated expansion ratio, and the low-frequency noise determined by can be eliminated.
Meanwhile, tail end silencing cotton is arranged on the side wall of the tail end expansion cavity 13, and when tail gas passes through the tail end silencing cotton, noise generated by the tail gas can be absorbed, so that a fixed noise reduction function is realized.
In order to balance the exhaust noise under various rotating speed working conditions when the exhaust noise of the diesel engine is controlled to different rotating speeds, and to reduce the exhaust noise under various rotating speed working conditions, the exhaust pipe 4 is provided with two exhaust pipes 4, the axes of the two exhaust pipes 4 extend in the front-back direction, the two exhaust pipes are arranged on the rear end surface of the rear cover at intervals in parallel, the diameters of the two corresponding exhaust pipes 4 are smaller than that of the tail end expansion cavity 13, the arrangement of the two exhaust pipes 4 can ensure the simplicity and compactness of the structure of the exhaust processor on the basis of ensuring the implementation of the noise elimination control under different working conditions, meanwhile, the barrel 1 is also provided with control valves for controlling the opening and closing of the two exhaust pipes 4, in the embodiment, the control valves are used for controlling and connecting with a control module on a vehicle body, the control module can receive rotating speed signals of the engine, during the actual working process, the rectified exhaust in the tail end idling expansion cavity 13 has two exhaust modes through the exhaust pipes 4, the exhaust pipes are used for controlling the exhaust flow of the exhaust pipes, and the exhaust pipes are opened and the exhaust pipe can be lifted into an exhaust pipe after the exhaust pipe is lifted from the exhaust pipe 4 under the working condition that the exhaust pipe is lifted by the whole exhaust pipe pressure of the exhaust pipe 364, and the exhaust pipe is increased, and the exhaust pipe pressure of the exhaust pipe is increased, and the exhaust pipe is increased greatly.
In the actual use process of the exhaust working modes of the two exhaust pipes 4, compared with the traditional postprocessor, the diameter of the single exhaust pipe 4 with respect to the single exhaust pipe 4 of the two exhaust ports is reduced, so that the expansion ratio of the single exhaust pipe 4 to the expansion ratio of the single exhaust pipe 4 is greatly increased, the acoustic transmission loss is increased, and the low-frequency noise elimination capability of the whole postprocessor can be improved due to the large transmission loss. Simultaneously under low-speed or idle operating mode, the exhaust noise is very obvious this moment, can reduce exhaust noise by a wide margin through the setting of two blast pipes 4, promotes the interior noise quality of car, brings the more quiet ride experience of driver and crew, makes the ride experience more joyful. As shown in the figure, compared with the single exhaust pipe 4, the TL of the main noise elimination frequency band can be improved by 3dB at the middle and low frequencies of 20-400 Hz by the two exhaust pipes 4. The structure is relatively simple, and the cost is lower. As shown in the figure, the noise silencing effect is compared in the state of single pipe, single pipe opening of the double exhaust pipes 4 and double pipe opening. As shown in the figure, the noise elimination effect graph after the exhaust noise active control system is used for controlling the opening and closing of the control valve can show that the integral noise elimination effect is obviously improved.
Adopt two blast pipes 4 simultaneously to compare in single blast pipe 4 can make tail gas more even pass through catalytic carrier 7 in the course of the work of reality, increase the contact time of tail gas and catalytic carrier 7, improve tail gas catalysis efficiency. Meanwhile, the tail gas passing holes are uniform, the speed of the tail gas passing holes is reduced, the overall speed of the tail gas is reduced, and high-frequency airflow friction sound is eliminated.
The silencer can balance the low-rotation-speed and medium-high-speed exhaust noise by adjusting the trigger rotation speed of the control valve opening while meeting the requirements of air intake and exhaust amount of the engine through the detection and control of the exhaust noise active control system and by tracking the rotation speed and torque information of the engine in real time, so that the exhaust at each rotation speed reaches a lower level, and the aim of reducing the exhaust noise at each rotation speed is fulfilled. According to the specific exhaust noise condition, the low-frequency noise of the exhaust and the air flow friction noise of the tail pipe of the engine can be eliminated in a well balanced manner.
Meanwhile, in the embodiment, the pipe bodies of the two exhaust pipes 4 are further connected with the bridging pipe 5 for communicating the two exhaust pipes 4, the end of the bridging pipe 5 is located at the front side of the other end, so that the bridging pipe 5 is obliquely arranged, the bridging pipe 5 is arranged so that the pipe diameter of the double tail pipes and the opening positions of the bridging pipe 5 on the double tail pipes are reasonably designed under the medium-high speed working condition, and exhaust noise with specific frequency can be self-eliminated by superposing positive and negative phases of sound waves.
In this embodiment, the cylinder 1 is further provided with a post-processor control module 3 for controlling connection with the control valve, and the post-processor control module is configured to receive a signal from the control module to control the opening and closing of the control valve. Since the engine is in a low speed or idle state most of the time, in order to achieve the energy saving effect, in this embodiment, the control valve is a normally closed valve, that is, in the control process, the corresponding exhaust pipe 4 is always kept closed, and when the exhaust pipe 4 needs to be opened, the control valve is opened under the control of the control module.
In other embodiments, more exhaust pipes can be arranged, and the number of the exhaust pipes can be selected arbitrarily according to actual control requirements, and of course, certain distance needs to be ensured between any two adjacent exhaust pipes, so that the silencing effect can be achieved.
In other embodiments, the control valve may be simultaneously disposed on a plurality of on-off valves of each exhaust pipe, and the background control module controls the on-off of different on-off valves to open and close the corresponding number of exhaust pipes.
In other embodiments, the control valve may be a normally open valve.
In other embodiments, no bridging tube may be provided.
The embodiment of the vehicle according to the present invention includes a vehicle body and a variable expansion ratio muffler post-processor provided in the vehicle body, and the structure of the post-processor is similar to the structure of the above-described embodiment of the variable expansion ratio muffler post-processor, and is not expanded in detail.
Claims (10)
1. The variable expansion ratio silencing postprocessor comprises a cylinder body with a front cover and a rear cover, wherein an expansion cavity is arranged in the cylinder body, exhaust pipes communicated with the expansion cavity are arranged on the rear cover, and the diameter of each exhaust pipe is smaller than that of the expansion cavity.
2. The variable expansion ratio acoustic aftertreatment device of claim 1, wherein: the blast pipe has two, and the interval is arranged side by side on the rear end face of back lid, and two blast pipes all extend along the axis extending direction of barrel and arrange.
3. The variable expansion ratio muffler post-processor according to claim 2, wherein the control valve is in control connection with exhaust pipes.
4. The variable expansion ratio acoustic aftertreatment device of claim 3, wherein: the control valve is a normally closed valve.
5. The variable expansion ratio sound attenuation post-processor as claimed in any one of , wherein the tube bodies of two adjacent exhaust tubes are connected with a bridge tube for connecting the two exhaust tubes, wherein the end of the bridge tube is located at the front side of the end.
6. The vehicle comprises a vehicle body and a variable expansion ratio silencing postprocessor arranged on the vehicle body, and is characterized in that the variable expansion ratio silencing postprocessor comprises a cylinder body with a front cover and a rear cover, an expansion cavity is arranged in the cylinder body, an exhaust pipe communicated with the expansion cavity is arranged on the rear cover, the diameter of the exhaust pipe is smaller than that of the expansion cavity, more than two exhaust pipes are arranged, a control valve used for controlling at least exhaust pipes to be opened or closed so as to adjust the expansion ratio between the exhaust pipe and the expansion cavity is further arranged on the cylinder body, and a control module used for receiving an engine speed signal and connected with the control valve is further arranged on the vehicle body.
7. The vehicle according to claim 6, characterized in that: the blast pipe has two, and the interval is arranged side by side on the rear end face of back lid, and two blast pipes all extend along the axis extending direction of barrel and arrange.
8. The vehicle of claim 7, wherein the control valve is in control connection with of the exhaust pipes.
9. The vehicle according to claim 8, characterized in that: the control valve is a normally closed valve.
10. The vehicle according to any one of claims 6 to 9 to , wherein a bridge pipe for connecting the two exhaust pipes is connected to the pipe bodies of the adjacent two exhaust pipes, and wherein a end of the bridge pipe is located on a front side of another end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810791985.2A CN110735689A (en) | 2018-07-18 | 2018-07-18 | Variable expansion ratio silencing postprocessor and vehicle using postprocessor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810791985.2A CN110735689A (en) | 2018-07-18 | 2018-07-18 | Variable expansion ratio silencing postprocessor and vehicle using postprocessor |
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| Publication Number | Publication Date |
|---|---|
| CN110735689A true CN110735689A (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810791985.2A Pending CN110735689A (en) | 2018-07-18 | 2018-07-18 | Variable expansion ratio silencing postprocessor and vehicle using postprocessor |
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| CN (1) | CN110735689A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202021003793U1 (en) | 2021-12-16 | 2022-01-14 | Stefan Burghardt | 360° link control for reflection silencer |
| DE202022000300U1 (en) | 2022-02-05 | 2022-02-18 | Stefan Burghardt | Reflection silencer with 360° link control with slotted holes |
| DE202022000229U1 (en) | 2022-01-28 | 2022-03-08 | Stefan Burghardt | Reflection silencer with 360° link control with slot |
| DE202021003282U1 (en) | 2021-10-21 | 2022-03-14 | Stefan Burghardt | Reflective silencer with 360° scene control |
| CN114718738A (en) * | 2021-01-05 | 2022-07-08 | 广州汽车集团股份有限公司 | Vehicle exhaust pipe valve control method, device, system and equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179784A (en) * | 1994-12-27 | 1996-07-12 | Fujitsu Ten Ltd | Actuator of noise control device |
| EP1722077A2 (en) * | 2005-05-13 | 2006-11-15 | Ricardo Deutschland GmbH | Apparatus to open and close an exhaust gas conduit |
| CN201110227Y (en) * | 2007-10-22 | 2008-09-03 | 比亚迪股份有限公司 | Exhaust pipe for automobile silencer as well as silencer for automobile using said exhaust pipe |
| CN103277171A (en) * | 2013-05-29 | 2013-09-04 | 华环（苏州）汽车科技有限公司 | Novel exhaust muffling structure |
| DE102013219332A1 (en) * | 2013-09-25 | 2015-03-26 | Bayerische Motoren Werke Aktiengesellschaft | Control of exhaust flap actuators |
| CN208633895U (en) * | 2018-07-18 | 2019-03-22 | 郑州宇通客车股份有限公司 | A kind of variable divergence ratio noise elimination preprocessor and the vehicle using the preprocessor |
-
2018
- 2018-07-18 CN CN201810791985.2A patent/CN110735689A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179784A (en) * | 1994-12-27 | 1996-07-12 | Fujitsu Ten Ltd | Actuator of noise control device |
| EP1722077A2 (en) * | 2005-05-13 | 2006-11-15 | Ricardo Deutschland GmbH | Apparatus to open and close an exhaust gas conduit |
| CN201110227Y (en) * | 2007-10-22 | 2008-09-03 | 比亚迪股份有限公司 | Exhaust pipe for automobile silencer as well as silencer for automobile using said exhaust pipe |
| CN103277171A (en) * | 2013-05-29 | 2013-09-04 | 华环（苏州）汽车科技有限公司 | Novel exhaust muffling structure |
| DE102013219332A1 (en) * | 2013-09-25 | 2015-03-26 | Bayerische Motoren Werke Aktiengesellschaft | Control of exhaust flap actuators |
| CN208633895U (en) * | 2018-07-18 | 2019-03-22 | 郑州宇通客车股份有限公司 | A kind of variable divergence ratio noise elimination preprocessor and the vehicle using the preprocessor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718738A (en) * | 2021-01-05 | 2022-07-08 | 广州汽车集团股份有限公司 | Vehicle exhaust pipe valve control method, device, system and equipment |
| CN114718738B (en) * | 2021-01-05 | 2023-04-07 | 广州汽车集团股份有限公司 | Vehicle exhaust pipe valve control method, device, system and equipment |
| DE202021003282U1 (en) | 2021-10-21 | 2022-03-14 | Stefan Burghardt | Reflective silencer with 360° scene control |
| DE202021003793U1 (en) | 2021-12-16 | 2022-01-14 | Stefan Burghardt | 360° link control for reflection silencer |
| DE202022000229U1 (en) | 2022-01-28 | 2022-03-08 | Stefan Burghardt | Reflection silencer with 360° link control with slot |
| DE202022000300U1 (en) | 2022-02-05 | 2022-02-18 | Stefan Burghardt | Reflection silencer with 360° link control with slotted holes |
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