EP1381025A2 - Geräuschdämpfungsvorrichtung mit einem Helmholtz-Resonator bei Anlagen mit pulsierenden Gasströmungen - Google Patents
Geräuschdämpfungsvorrichtung mit einem Helmholtz-Resonator bei Anlagen mit pulsierenden Gasströmungen Download PDFInfo
- Publication number
- EP1381025A2 EP1381025A2 EP03013618A EP03013618A EP1381025A2 EP 1381025 A2 EP1381025 A2 EP 1381025A2 EP 03013618 A EP03013618 A EP 03013618A EP 03013618 A EP03013618 A EP 03013618A EP 1381025 A2 EP1381025 A2 EP 1381025A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- neck
- damping device
- chamber
- noise damping
- gas flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/00013—Reducing thermo-acoustic vibrations by active means
Definitions
- the present invention relates to a noise damping device to reduce muzzle noises in systems with pulsating gas flows, especially one Fresh air intake system or an exhaust system of an internal combustion engine, e.g. in a motor vehicle.
- Such a noise damping device is from the Known from DE 43 05 333 C1 and has a Helmholtz resonator, whose chamber over several identical connecting necks communicates with a gas flow channel in which a pulsating gas, especially to an internal combustion engine fresh air flowing in or from the internal combustion engine exhaust gas flowing out, flows.
- a pulsating gas especially to an internal combustion engine fresh air flowing in or from the internal combustion engine exhaust gas flowing out
- the Connecting necks arranged in register one behind the other either opened with a common switching element one after the other or be closed or with the help of separate Switching elements can be opened or closed individually.
- one of the connecting necks not switchable, so always open and therefore permanently connects the chamber with the gas flow channel.
- Under an open Connecting neck is understood here to be a connecting neck through the pressure waves from the gas flow channel into the Enter the chamber and, if necessary, run back.
- the opened connection necks are thus activated State in which it is the chamber with the gas flow channel connect.
- the difference is with a closed one Connection neck no exchange of sound waves between Chamber and gas flow channel possible, so that the closed Connection neck is deactivated so far and accordingly the chamber does not connect to the gas flow channel.
- the noise reduction device In the known noise reduction device are all Connection necks in terms of neck cross-section and neck length designed identically.
- the frequency of the main noise depends on the speed of the internal combustion engine.
- the noise reduction device of the present kind can by the activation of a corresponding number of connecting necks the resonance frequency of the Helmholtz resonator to the adapt the respective operating states of the internal combustion engine, all the more in a wide range of different operating states always adequate damping of the respective To achieve the main interference frequency.
- the known noise damping device has the disadvantage, however, that the effort to realize them, in particular through the large number of switching elements, is relatively large.
- DE 100 04 991 A1 shows a further noise damping device, a Helmholtz resonator with a variable resonance frequency having. This can be done by a skillful Flow guidance using the neck length of the resonator volume connecting neck connecting the gas flow channel between two lengths can be varied. Depending on the effective neck length a different resonance frequency then results. adversely is also here that those used for flow control Orifices lie in the flow path and thus flowed through become.
- the present invention addresses the problem for a noise damping device of the aforementioned Type to specify an improved embodiment, the particular sufficient in a relatively large frequency range Damping enables and still relatively inexpensive can be produced.
- the invention is based on the general idea of the chamber of the Helmholtz resonator over exactly two or over at least two differently dimensioned connecting necks connect to the gas flow channel, one of which is always active and only the other one can be activated as required and can be deactivated. Due to this design there is only one only switching element required, which is a special enables inexpensive construction.
- the noise damping device according to the invention are only two different ones Resonance frequencies adjustable, but can be adjusted by a suitable Selection of these two resonance frequencies for one adequate damping effect in the relatively broad frequency range can be achieved.
- the cost advantages of the invention outweigh Noise attenuation device.
- the present noise attenuation device requires one significantly reduced installation space.
- the two connecting necks can expediently refer to one another Differentiate neck cross-section and / or neck length from each other.
- By appropriately dimensioning the two Connection necks can be the distance between the two adjustable Resonance frequencies are chosen to be relatively large, whereby the bandwidth of the noise reduction device according to the invention achievable damping effect improved becomes.
- the two connecting necks can be advantageous be coordinated so that the two Resonance frequencies of the Helmholtz resonator about one Are octave apart.
- This embodiment is particularly suitable for an application of the noise damping device in an internal combustion engine.
- Fig. 1 shows a greatly simplified principle representation a noise reduction device according to the invention.
- connection necks 4 and 5 connect the chamber 3 with a gas flow channel 6, in which a pulsating gas flows, which is indicated by arrows 7 is indicated.
- This gas flow channel 6 can with a preferred application of the noise damping device 1 through a fresh air line of a fresh air intake system an internal combustion engine or through an exhaust pipe Exhaust system of an internal combustion engine, especially in one Motor vehicle, be formed. The pulsation of the gas flow arises from the gas exchange processes in the Internal combustion engine.
- the second connecting neck 5 is a switching element 8 assigned, with the help of a communicating Connection between the chamber 3 and the gas flow channel 6 opened and closed by the second connecting neck 5 can be.
- this is Switching element 8 is exemplarily shown as a flap between a closed position shown with a solid line an open position shown with a broken line is adjustable.
- the closed position of the switching element 8 is the second connection neck 5 in one deactivated state.
- An activated state of the second Connection neck 5 results when the switching element is open 8.
- the switching element 8 is, for example, by means of an actuator 9 operable that in turn from a control unit 10 is operated.
- This control unit 10 can at Use of the noise damping device 1 for one Internal combustion engine in an engine control unit of the internal combustion engine integrated in hardware and / or implemented in software his.
- the control unit 10 expediently actuates via the actuator 9, the switching element 8 depending on the Speed and / or the load of the internal combustion engine.
- the two connecting necks 4, 5 are designed differently with regard to the neck length and / or neck cross section.
- a neck length L H1 of the first connection neck 4 is preferably greater than a neck length L H2 of the second connection neck 5.
- a neck cross section S H1 of the first connection neck 4 is smaller than a neck cross section S H2 of the second connection neck 5
- Fig. 1 shows a cross section S K of the gas flow channel 6.
- the different neck lengths L H1 , L H2 are realized in the embodiment shown here in that the second connecting neck 5 extends from the gas flow channel 6, into which it does not protrude, to a wall 11 of the chamber 3.
- the second connection neck 5 opens into the chamber 3 on the wall 11 without projecting into the chamber 3.
- the first connecting neck 4 extends through the wall 11 and thus projects into the chamber 3. The opening of the first connecting neck 4 into the chamber 3 thus takes place at a distance from the wall 11 inside the chamber 3.
- connection necks 4 and 5 are expediently matched to one another with regard to the neck length L H and neck cross section S H such that a first resonance frequency of the Helmholtz resonator 2, which is present when the second connection neck 5 is deactivated, is approximately one octave below a second resonance frequency which is activated when the second connection neck 5 is present. Due to this dimensioning of the connecting necks 4, 5, the noise damping device 1 is adapted in a special way to the requirements of an internal combustion engine.
- the resonance frequencies are advantageously tuned when a ratio of neck length to neck cross section L H / S H is greater for the first connecting neck 4 than for the second connecting neck 5: L H1 / S H1 > L H2 / S H2 ,
- the neck cross section S H2 of the second connecting neck 5 is at least larger than half the cross section S K of the gas flow channel 6: S H2 ⁇ 0.5 x S K ,
- the present noise damping device 1 only has two connecting necks 4, 5, of which only one is a closing element 8 is assigned, whereby the inventive Noise damping device 1 a particularly inexpensive Has structure.
- the connecting necks 4, 5, Through the targeted dimensioning of the connecting necks 4, 5, however, two can be relatively different from each other spaced resonance frequencies are realized that depending on the switching position of the switching element 8 alternately can be activated.
- the noise reduction device 1 is therefore particularly suitable for use in internal combustion engines in motor vehicles.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims (10)
- Geräuschdämpfungsvorrichtung zur Reduktion von Mündungsgeräuschen bei Anlagen mit pulsierenden Gasströmungen, insbesondere bei einer Frischluftansauganlage oder einer Abgasanlage einer Brennkraftmaschine,mit einem Gasströmungskanal (6), in dem ein pulsierendes Gas strömt,mit einem Helmholtz-Resonator (2), dessen Kammer (3) über wenigstens zwei unterschiedlich dimensionierte Verbindungshälse, nämlich über einen ersten Verbindungshals (4) und über einen zweiten Verbindungshals (5), mit dem Gasströmungskanal (6) verbunden ist,wobei die Kammer (3) über den ersten Verbindungshals (4) permanent mit dem Gasströmungskanal (6) kommuniziert, während der zweite Verbindungshals (5) mittels eines Schaltglieds (8) zwischen einem aktivierten Zustand, in dem die Kammer (3) über den zweiten Verbindungshals (5) mit dem Gasströmungskanal (6) kommuniziert, und einem deaktivierten Zustand umschaltbar ist, in dem die Kammer (3) über den zweiten Verbindungshals (5) nicht mit dem Gasströmungskanal (6) kommuniziert.
- Geräuschdämpfungsvorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass die beiden Verbindungshälse (4, 5) hinsichtlich Halsquerschnitt (SH) und/oder Halslänge (LH) unterschiedlich dimensioniert sind. - Geräuschdämpfungsvorrichtung nach Anspruch 2,
dadurch gekennzeichnet, dass der Halsquerschnitt (SH2) des zweiten Verbindungshalses (5) größer ist als der Halsquerschnitt (SH1) des ersten Verbindungshalses (4) . - Geräuschdämpfungsvorrichtung nach Anspruch 2 oder 3,
dadurch gekennzeichnet, dass die Halslänge (LH1) des ersten Verbindungshalses (4) größer ist als die Halslänge (LH2) des zweiten Verbindungshalses (5). - Geräuschdämpfungsvorrichtung nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, dass ein Verhältnis von Halslänge (LH) zu Halsquerschnitt (SH) beim ersten Verbindungshals (4) größer ist als beim zweiten Verbindungshals (5). - Geräuschdämpfungsvorrichtung nach Anspruch 5,
dadurch gekennzeichnet, dass das Verhältnis von Halslänge (LH) zu Halsquerschnitt (SH) beim ersten Verbindungshals (4) mindestens doppelt so groß ist wie beim zweiten Verbindungshals (5). - Geräuschdämpfungsvorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass der Halsquerschnitt (SH2) des zweiten Verbindungshalses (5) größer ist als der halbe Querschnitt (SK) des Gasströmungskanals (6). - Geräuschdämpfungsvorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass die beiden Verbindungshälse (4, 5) so aufeinander abgestimmt sind, dass die Resonanzfrequenz des Helmholtz-Resonators (2) bei aktiviertem zweiten Verbindungshals (5) etwa eine Oktave höher liegt als bei deaktiviertem zweiten Verbindungshals (5). - Geräuschdämpfungsvorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass der zweite Verbindungshals (5) an einer Wand (11) der Kammer (3) in die Kammer (3) einmündet und dass der erste Verbindungshals (4) die Wand (11) durchdringt, in die Kammer (3) hineinragt und in der Kammer (3) in diese einmündet. - Geräuschdämpfungsvorrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass das Schaltglied (8) von einer Steuereinheit (10) in Abhängigkeit von Drehzahl und/oder Last einer Brennkraftmaschine betätigt wird, deren Frischluftansauganlage und/oder deren Abgasanlage mit der Geräuschdämpfungsvorrichtung (1) ausgestattet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10231238 | 2002-07-11 | ||
| DE2002131238 DE10231238B4 (de) | 2002-07-11 | 2002-07-11 | Geräuschdämpfungsvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1381025A2 true EP1381025A2 (de) | 2004-01-14 |
| EP1381025A3 EP1381025A3 (de) | 2004-12-08 |
Family
ID=29723835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03013618A Withdrawn EP1381025A3 (de) | 2002-07-11 | 2003-06-16 | Geräuschdämpfungsvorrichtung mit einem Helmholtz-Resonator bei Anlagen mit pulsierenden Gasströmungen |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1381025A3 (de) |
| DE (1) | DE10231238B4 (de) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472264A (zh) * | 2009-08-03 | 2012-05-23 | 皇家飞利浦电子股份有限公司 | 用于压缩机雾化器系统中的具有可调频率特性的低约束谐振器 |
| EP3434876A1 (de) * | 2017-07-25 | 2019-01-30 | Siemens Aktiengesellschaft | Brennkammervorrichtung und verfahren für den betrieb einer brennkammervorrichtung |
| CN110322868A (zh) * | 2019-06-06 | 2019-10-11 | 江苏科技大学 | 一种主动变频赫姆霍兹共振器及其调频降噪方法 |
| CN110751938A (zh) * | 2019-10-12 | 2020-02-04 | 江苏科技大学 | 一种亥姆霍兹共振器及其工作方法 |
| CN111878406A (zh) * | 2020-08-19 | 2020-11-03 | 珠海格力电器股份有限公司 | 压缩机及空调机组 |
| EP3738494A1 (de) * | 2019-05-14 | 2020-11-18 | Koninklijke Philips N.V. | Rauschverringerungsvorrichtung |
| US20210065672A1 (en) * | 2019-08-30 | 2021-03-04 | Hyundai Motor Company | Variable wheel resonator system for a vehicle |
| EP4675610A1 (de) * | 2024-07-01 | 2026-01-07 | BAE SYSTEMS plc | Akustisches steuermodul |
| WO2026008965A1 (en) * | 2024-07-01 | 2026-01-08 | Bae Systems Plc | Acoustic control module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7690478B2 (en) | 2006-09-15 | 2010-04-06 | Visteon Global Technologies, Inc. | Continuously variable tuned resonator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03963A (ja) * | 1989-05-29 | 1991-01-07 | Honda Motor Co Ltd | 内燃機関の吸気音低減装置 |
| DE4305333C1 (de) * | 1993-02-20 | 1994-07-07 | Fasag Ag Suhr | Geräuschdämpfungsvorrichtung zur Reduktion von Mündungsgeräuschen bei Anlagen mit pulsierenden Gasströmungen |
| DE19618432A1 (de) * | 1996-05-08 | 1997-11-13 | Mann & Hummel Filter | Ansaugvorrichtung für einen Verbrennungsmotor |
| DE10004991A1 (de) * | 2000-02-04 | 2001-08-09 | Volkswagen Ag | Helmholtz-Resonator mit variabler Resonanzfrequenz |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4546733A (en) * | 1983-03-22 | 1985-10-15 | Nippondenso Co., Ltd. | Resonator for internal combustion engines |
| DE19743482A1 (de) * | 1997-10-01 | 1999-04-08 | Mann & Hummel Filter | Schalldämpfer mit einem Nebenschlußresonator |
-
2002
- 2002-07-11 DE DE2002131238 patent/DE10231238B4/de not_active Expired - Fee Related
-
2003
- 2003-06-16 EP EP03013618A patent/EP1381025A3/de not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03963A (ja) * | 1989-05-29 | 1991-01-07 | Honda Motor Co Ltd | 内燃機関の吸気音低減装置 |
| DE4305333C1 (de) * | 1993-02-20 | 1994-07-07 | Fasag Ag Suhr | Geräuschdämpfungsvorrichtung zur Reduktion von Mündungsgeräuschen bei Anlagen mit pulsierenden Gasströmungen |
| DE19618432A1 (de) * | 1996-05-08 | 1997-11-13 | Mann & Hummel Filter | Ansaugvorrichtung für einen Verbrennungsmotor |
| DE10004991A1 (de) * | 2000-02-04 | 2001-08-09 | Volkswagen Ag | Helmholtz-Resonator mit variabler Resonanzfrequenz |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472264A (zh) * | 2009-08-03 | 2012-05-23 | 皇家飞利浦电子股份有限公司 | 用于压缩机雾化器系统中的具有可调频率特性的低约束谐振器 |
| CN102472264B (zh) * | 2009-08-03 | 2016-01-20 | 皇家飞利浦电子股份有限公司 | 用于压缩机雾化器系统中的具有可调频率特性的低约束谐振器 |
| US9790937B2 (en) | 2009-08-03 | 2017-10-17 | Koninklijke Philips N.V. | Low restriction resonator with adjustable frequency characteristics for use in compressor nebulizer systems |
| US11525396B2 (en) | 2017-07-25 | 2022-12-13 | Siemens Energy Global GmbH & Co. KG | Combustor apparatus with bleed arrangement and resonator with cooling flow and method of operating combustor apparatus |
| WO2019020474A1 (en) * | 2017-07-25 | 2019-01-31 | Siemens Aktiengesellschaft | COMBUSTION APPARATUS AND METHOD OF OPERATION |
| EP3434876A1 (de) * | 2017-07-25 | 2019-01-30 | Siemens Aktiengesellschaft | Brennkammervorrichtung und verfahren für den betrieb einer brennkammervorrichtung |
| EP3738494A1 (de) * | 2019-05-14 | 2020-11-18 | Koninklijke Philips N.V. | Rauschverringerungsvorrichtung |
| WO2020229238A1 (en) * | 2019-05-14 | 2020-11-19 | Koninklijke Philips N.V. | Noise reduction device |
| CN113853145A (zh) * | 2019-05-14 | 2021-12-28 | 皇家飞利浦有限公司 | 降噪设备 |
| CN110322868A (zh) * | 2019-06-06 | 2019-10-11 | 江苏科技大学 | 一种主动变频赫姆霍兹共振器及其调频降噪方法 |
| US20210065672A1 (en) * | 2019-08-30 | 2021-03-04 | Hyundai Motor Company | Variable wheel resonator system for a vehicle |
| US11657792B2 (en) * | 2019-08-30 | 2023-05-23 | Hyundai Motor Company | Variable wheel resonator system for a vehicle |
| CN110751938A (zh) * | 2019-10-12 | 2020-02-04 | 江苏科技大学 | 一种亥姆霍兹共振器及其工作方法 |
| CN111878406A (zh) * | 2020-08-19 | 2020-11-03 | 珠海格力电器股份有限公司 | 压缩机及空调机组 |
| EP4675610A1 (de) * | 2024-07-01 | 2026-01-07 | BAE SYSTEMS plc | Akustisches steuermodul |
| WO2026008965A1 (en) * | 2024-07-01 | 2026-01-08 | Bae Systems Plc | Acoustic control module |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10231238A1 (de) | 2004-01-29 |
| DE10231238B4 (de) | 2004-06-03 |
| EP1381025A3 (de) | 2004-12-08 |
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