EP1055804B1 - Aktiver Abgasschalldämpfer - Google Patents
Aktiver Abgasschalldämpfer Download PDFInfo
- Publication number
- EP1055804B1 EP1055804B1 EP00110736A EP00110736A EP1055804B1 EP 1055804 B1 EP1055804 B1 EP 1055804B1 EP 00110736 A EP00110736 A EP 00110736A EP 00110736 A EP00110736 A EP 00110736A EP 1055804 B1 EP1055804 B1 EP 1055804B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casing
- exhaust silencer
- silencer according
- loudspeaker
- wall
- 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.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
-
- 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
Definitions
- Active exhaust silencers for the exhaust systems of motor vehicles contain at least one speaker with which an anti-noise phase-shifted to the engine noise is produced.
- To couple the anti-noise and the noise To enable, is a sound coupling parts in the exhaust pipe mostly in the form of a perforation of the pipe wall. The Sound comes from the anti-sound feed point, for example from where the Sound speaker is arranged via a resonance channel to the sound coupling point.
- Such active exhaust silencers are for example in EP 0 916 817 A2, EP 0 674 097 A1 and US 5,600,106.
- Exhaust silencer of the present Art must be built relatively compact so that they are in the underbody area of the vehicle can be accommodated.
- the compact design means that the Loudspeakers close to the exhaust pipe, which is strongly heated by exhaust gases must be arranged and thereby a high thermal Exposed to stress.
- the one described in US 5,600,106 Exhaust muffler is trying this problem to be solved by supplying outside air to the resonance channel becomes. This is achieved in that the resonance channel enclosing housing has an atmosphere opening, about the atmospheric air is sucked in. The suction is through a cross-sectional constriction of the exhaust pipe in the area of Sound coupling parts reached.
- a disadvantage of this configuration is that moisture and dirt in the exhaust silencer can reach.
- Another disadvantage is in that the supplied atmospheric air is the effectiveness check emission control systems.
- an exhaust silencer which has two anti-noise speakers containing first housing and a has a second housing into which the exhaust pipe of an exhaust gas System is introduced and in which there is a sound coupling point located.
- the first housing is with a channel connected to the second housing. The spatial separation between the two housings reduce the thermal load the anti-noise speaker, but requires a lot of installation space.
- the invention is based, an exhaust muffler the task to propose, despite being more compact and simpler The thermal load on the anti-noise loudspeaker is reduced.
- This task is accomplished with an exhaust silencer Features of claim 1 solved.
- This includes a housing that of a sound coupling point in his pipe wall having exhaust pipe is penetrated. There is also an entry point available for anti-noise. The entry point is with the sound coupling point over the one resonance channel forming interior of the housing connected. Are the section containing the entry point and the Section of the resonance channel containing the sound coupling point by a cooling gap through which cooling air flows Cut. In this way, a compact can be made in general Design with sufficient cooling, especially one realize heat-sensitive speaker.
- the speaker can be relatively close to the exhaust pipe in this embodiment or the sound coupling point can be arranged without an impermissibly high thermal load on the loudspeaker would be feared. Between the speaker and the sound coupling point having exhaust pipe section forms the Cooling gap a both mechanical and thermal barrier. While driving or when operating a ventilation system the cooling gap is intensively flowed with cooling air, so that adequate cooling is guaranteed.
- the resonance channel Is U-shaped, the U-legs extend in the longitudinal direction of the exhaust pipe. So is this Arrangement of one of the U-legs penetrated by the exhaust pipe, while the anti-noise is fed into the other U-leg.
- the feed point and the sound coupling point are preferred arranged in the region of the free end of the channel sections.
- the U-legs can due to the existing between them Cooling gap can be arranged very close to each other, so that there is a relatively slim design of the muffler housing can be achieved.
- the housing bordering the resonance channel is preferably formed from two half shells, the Parting plane parallel to the longitudinal direction of the exhaust pipe and runs through the resonance channel.
- the cooling gap is thereby formed by outer wall sections of the half-shells in Direction to the parting line, for example through a deep-drawing process have moved in.
- This configuration is the manufacturing simplified.
- the two half-shells only have to be interposed of the exhaust pipe stacked and together connected, for example welded. Any additional Partitions that are difficult to install to form the resonance channel inside the housing are not necessary.
- sound speakers can be described within the Housing be arranged. however, it is preferred arranged outside the case to its thermal Reduce burden even further.
- the feeding of the anti-noise in the resonance channel takes place via an infeed point forming opening in the upper housing wall.
- the loudspeaker is in a manner known per se in one possible soundproof housing arranged.
- this housing with its bottom on the upper case wall of the first case that fixed between the two housings a cooling gap remains, which is essentially over the entire area of the speaker cabinet or the upper housing wall extends.
- the air-filled cooling gap acts as thermal insulation. This is particularly effective Thermal insulation when the cooling gap opens to the atmosphere and accordingly can be flowed through by cooling air.
- a Another thermal insulation measure is that the sound coupling point connecting and inside the housing arranged section of the exhaust pipe as air gap insulated Double tube is formed. It is particularly advantageous if the double-walled pipe section in the area of the housing interior, in which the two mentioned Pipe sections are connected to each other.
- Electrodynamic loudspeakers are preferably used, wherein additional cooling is achieved by the Speaker magnet with the outer wall of the second housing in There is thermal contact.
- the outer wall of the second housing comes in contact with cooling air and acts like a cooling surface that removes heat from the magnet.
- Another way to use the magnet and of course to cool the voice coil in that the magnet through an opening in the outer wall of the protrudes through the second housing and can therefore be cooled by cooling air is.
- a central through hole is available in the magnet, especially for powerful electrodynamic loudspeakers. Since moisture and dirt can get into the diaphragm rear space via this hole, it is expedient if this opening is closed when the magnets protrude from the housing. However, the opening is preferably connected via a line either to the interior of the second housing with another splash-proof air volume. In this way, ventilation of the membrane rear space enclosed by the loudspeaker basket and the membrane and thus a further cooling possibility for the magnet is created without that dirt and moisture can penetrate through the hole.
- the manufacture and also the assembly of the second, the loudspeaker Receiving housing is simplified if it is made of plastic consists. Such a material is particularly preferred, which has improved sound insulation properties compared to metal.
- Fig. 1 shows a schematic representation of a section of a motor vehicle exhaust system with an active exhaust silencer 1.
- This essentially comprises one Electrodynamic loudspeaker 2, which has an anti-noise via a feed point 3 emits in a resonance channel 4, which to a sound coupling point 5 leads to an exhaust pipe 6.
- the sound generated by speaker 2 is modeled on the noise generated by the vehicle engine and such out of phase that a reduction and / - at the sound coupling point 5 or change in noise.
- the Exhaust muffler 1 includes a first housing 7 that extends from the exhaust pipe 6 is penetrated and a second housing 8 which receives the speaker 2.
- the first housing 7 is essentially U-shaped. Is accordingly the interior enclosed by him or that formed by the interior Resonance channel 4 also U-shaped.
- the U-legs form a first and second first each extending in the longitudinal direction of the exhaust pipe 6 and second channel section 10, 11.
- the first channel section is from the exhaust pipe 6 enforced.
- the sound coupling point formed by a tube wall perforation 12 5 is positioned in the region of the free end 13 of the first channel section 10.
- the second channel section 11 contains the feed point 3 which of an opening arranged in the region of the free end 13 of the channel section 11 14 is formed in the upper wall 15 of the housing 7.
- the facing each other Inner sides of the channel sections 10, 11 do not border with a common one Wall to each other, but each channel section has its own Wall area 16,17, which are spaced from each other, so that in between a cooling gap 18 is present.
- this cooling gap is already at stationary vehicle, part of the heat generated by the exhaust pipe through air cooling dissipated and thus the proportion in the direction of arrow 19 on the second channel section 11 and in particular transmitted to the feed point 3 Reduced heat quantity.
- the second housing 8, in which the loudspeaker 2 is arranged soundproofed, is fixed to the upper wall 15 of the housing 7 in such a way that between the Wall 15 and the bottom 20 of the housing 8 facing it a cooling gap 22nd is available.
- the cooling gap 22 extends essentially over the entire Surface of the wall 15 or the bottom 20 and is only from a sealing ring 23rd interrupted, the opening 14 and an opposite opening 24 in Bottom 20 seals to the outside.
- the sealing ring 23 is also used for mechanical Fixing the housing 8 to the housing 7.
- the two housings 7,8 held together by connecting elements 25, which are between from the side faces of the housings 7,8 radially projecting flanges 26 extend.
- the cooling gap 22 is reduced, especially if it is from Cooling air flows through, the heat transfer from the first housing 7 to the second Housing 8 in which the speaker 2 is arranged. Heat propagation can be reduced via the connecting elements 26 and the sealing ring 23, if materials with poor thermal conductivity are used for these parts.
- the loudspeaker 2 is arranged in the housing 8 in such a way that its thermal load particularly critical magnet 27 through an opening 28 protrudes the housing 8. He is thus in the operation of the vehicle with cooling air flows around and is therefore cooled particularly intensively. Another reduction The thermal load on the magnet can still be achieved that the through hole usually present in more powerful speakers 2 29 in the magnet 27 is used for cooling. That means this Hole is not closed, but remains open to an air exchange with the atmosphere. As can be seen in particular from FIGS. 4 and 5 is the funnel-shaped membrane 31 in a likewise funnel-shaped speaker basket 32 arranged.
- a check valve 36 may be provided is designed, for example, as a flap valve (FIG. 5).
- the check valve can also inside the bore 29 or on the inside of the magnet 27 be arranged.
- the vibrating membrane 31 In connection with the check valve 36, the vibrating membrane 31 generate a directed air flow 39 (Fig.2). There the speaker basket 32 has openings from home, the cycle is the Air flow 39 is not interrupted in this respect. That is the base area of the membrane 31, bellows-shaped fixing element 40 fixing to the loudspeaker basket 32 also does not obstruct the air flow 39 since it is made of a coarse, air permeable Tissue. In the manner described is thus during the Loudspeaker operation within the housing 8 cooled air through which Voice coil 34 receiving gap 35 moves out, causing the magnet 27 and the voice coil 34 are additionally cooled.
- the adjoining the sound coupling point 5 and within the housing 7 arranged section 41 of the exhaust pipe 6 is double-walled, to the heat transfer in which the two channel sections 10 and 11 together to reduce the connecting base area 42 of the resonance channel 4.
- the 6 shows the first housing 7, which is composed of two half-shells 43, 44.
- the parting plane 45 between the half-shells 43, 44 runs parallel to the longitudinal direction of the exhaust pipe 6 and through the resonance chamber 4 or Channel sections 10,11 through.
- the two half-shells 43, 44 are each sheet metal deep-drawn parts, in which the U-shaped resonance channel 4 about half each is preformed.
- the half-shells 43, 44 each have an edge Flange 46 on.
- the flanges 46 are welded together in the assembled state.
- the part of the housing 7 penetrated by the exhaust pipe 6 has an input and outlet opening 47, 48, each of which is penetrated by the exhaust pipe 6 is.
- the cooling gap formed by the inwardly drawn wall areas 15, 16 18 is due to the production in the deep-drawing process by a Web 49 divided into an upper and lower half 18a, 18b.
- the manufacture of the Half-shells 43, 44 can, however, be modified so that this web is omitted.
- the Web 49 can also be subsequently removed if necessary.
- the the Channel section 11 delimiting and a feed point 3 forming opening 14 having part of the housing 6 has a lower overall height than that housing part penetrated by the exhaust pipe 6.
- the upper runs accordingly Wall 15 obliquely with respect to the lower wall 21. For an area of the opening 14 speakers to be arranged thus have a larger installation space Available.
- the second housing 8 is also designed in two parts; it exists from a bottom part 50 and a cover part 51.
- the bottom part 50 is - from the housing 7 viewed from - concave and has an edge Flange 52, which can be fixed to the flange 46 of the half-shell 43.
- the two-part design of the housing 8 can initially be the base part 50, as shown in FIG be fixed to the housing 7.
- the curvature of the bottom part 50 is there such that between the housing 7 or between the half-shell 43 and the Bottom part 50 remains a cooling gap 22 serving for thermal insulation or cooling.
- the end wall pointing in the flow direction 9, that is to say in the direction of travel 53 54 of the bottom part 50 has two opening into the flange 52 at a distance side by side, the supply of cooling air into the cooling gap 22 serving recesses 55.56.
- the recess 56 is dimensioned such that the exhaust pipe 6 or the flange region 57 of the half shell holding it 43 with a radial spacing, so that between the flange region 57 and cooling air can flow into the cooling gap 22 at the edge of the recess 56.
- the sealing ring 26 is inserted (Fig.2).
- the edge of the opening 24 in the bottom part 50 is one from the outer surface of the base part 50 protruding collar 59 formed (Fig.7).
- the collar is the loudspeaker 2 with a molded onto its loudspeaker basket 32 Flange 60 fixed. Stand near the collar 59 from the bottom part 50 pin-shaped fixing elements 61, each having an opening 62 in the flange 60 succeed.
- the cover part 51 which is also concavely curved in relation to the housing 7, is attached.
- the cover part 51 has an edge flange 63, which is on the flange 52 of the bottom part 50 is weldable.
- 53 are pointing in the direction of travel End wall 64 of the cover part 51 recesses 65, 66 available are designed in accordance with the recesses 55, 56 in the base part 50 and cursed with them.
- recesses 67 are present, which correspond to the recesses 58 are designed in the bottom part 50 and are flush with them.
- the ones on the flanges 52 and 53 adjoining wall areas 72 of the cover part 51 and the base part 50 are close to each other, so that the two mentioned Parts formed the speaker 2 receiving interior sealed to the outside is.
- An upper wall area of the cover part 51 is pot-like to a recess 68 retracted, an opening 70 being present in the bottom wall 69 of this depression through which the loudspeaker magnet 27 extends.
- the bottom wall 69 spans a flat surface and lies on one when assembled counter surface 71 (FIG. 8) on the loudspeaker basket 32, which is also flat. Between the bottom wall 69 and the counter surface 71, a sound-absorbing Sealing element be present (not shown).
Description
dass Schmutz und Feuchtigkeit über die Bohrung eindringen können.
- 1
- Abgasschalldämpfer
- 2
- Lautsprecher
- 3
- Einspeisungsstelle
- 4
- Resonanzkanal
- 5
- Schallkopplungsstelle
- 6
- Abgasrohr
- 7
- 1. Gehäuse
- 8
- 2. Gehäuse
- 9
- Strömungsrichtung
- 10
- 1. Kanalabschnitt
- 11
- 2. Kanalabschnitt
- 12
- Perforierung
- 13
- Freiende
- 14
- Öffnung
- 15
- Obere Wand
- 16
- Wandbereich
- 17
- Wandbereich
- 18
- Kühlspalt
- 19
- Pfeil
- 20
- Boden
- 21
- Untere Wand
- 22
- Kühlspalt
- 23
- Dichtring
- 24
- Öffnung
- 25
- Verbindungselement
- 26
- Flansch
- 27
- Magnet
- 28
- Öffnung
- 29
- Durchgangsbohrung
- 31
- Membran
- 32
- Lautsprecherkorb
- 33
- Pfeil
- 34
- Schwingspule
- 35
- Spaltraum
- 36
- Rückschlagventil
- 37
- Leitung
- 38
- Innenraum
- 39
- Luftströmung
- 40
- Fixierelement
- 41
- Abschnitt
- 42
- Basisbereich
- 43
- Halbschale
- 44
- Halbschale
- 45
- Trennebene
- 46
- Flansch
- 47
- Eingangsöffnung
- 48
- Ausgangsöffnung
- 49
- Steg
- 50
- Bodenteil
- 51
- Deckelteil
- 52
- Flansch
- 53
- Fahrtrichtung
- 54
- Stirnwand
- 55
- Ausnehmung
- 56
- Ausnehmung
- 57
- Flanschbereich
- 58
- Ausnehmung
- 59
- Kragen
- 60
- Flansch
- 61
- Fixierelement
- 62
- Öffnung
- 63
- Flansch
- 64
- Stirnwand
- 65
- Ausnehmung
- 66
- Ausnehmung
- 67
- Ausnehmung
- 68
- Vertiefung
- 69
- Bodenwand
- 70
- Öffnung
- 71
- Gegenfläche
- 72
- Wandbereich
Claims (15)
- Aktiver Abgasschalldämpfer mit einem eine Schallkoppelstelle (5) in seiner Rohrwandung aufweisenden ein Gehäuse (7) durchsetzenden Abgasrohr (6), einer Einspeisungsstelle (3) für Antischall und einem diese mit der Schallkopplungsstelle (5) verbindenden, von dem Innenraum des Gehäuses (7) gebildeten Resonanzkanal (4),
dadurch gekennzeichnet, dass der die Einspeisungsstelle (3) enthaltende Abschnitt (11) und der die Schallkoppelstelle (5) enthaltende Abschnitt (10) des Resonanzkanals (4) durch einen von Kühlluft durchströmten Kühlspalt (18) voneinander getrennt sind, wobei die Kanalabschnitte (10,11) sich in Längsrichtung des Abgasrohres (6) erstreckende Schenkel des U-förmig ausgebildeten Resonanzkanals (4) sind. - Abgasschalldämpfer nach Anspruch 1,
dadurch gekennzeichnet, dass die Einspeisungsstelle (3) und die Schallkopplungsstelle (5) jeweils im Bereich des Freiendes (13) der Kanalabschnitte (10,11) angeordnet sind. - Abgasschalldämpfer nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass das Gehäuse (7) aus zwei Halbschalen (43,44) besteht, deren Trennebene (45) parallel zur Längsrichtung des Abgasrohres (6) und durch den Resonanzkanal (4) hindurch verläuft, wobei der Kühlspalt (18) von Wandbereichen (16,17) der Halbschalen (43,44) gebildet ist, die in Richtung auf die Trennebene (45) eingezogen sind. - Abgasschalldämpfer nach einem der Ansprüche 1 bis 3,
gekennzeichnet durch
einen außerhalb des Gehäuses (7) angeordneten Lautsprecher (2), der über eine die Einspeisungsstelle (3) bildende Öffnung (14) in der oberen Gehäusewand (15) mit dem Resonanzkanal (4) in Wirkverbindung steht. - Abgasschalldämpfer nach Anspruch 4,
gekennzeichnet durch,
ein den Lautsprecher (2) aufnehmendes Gehäuse (8), das unter Zwischenlage eines von Kühlluft durchströmbaren Kühlspalt (22) an das vom Abgasrohr (6) durchsetzte Gehäuse (7) grenzt. - Abgasschalldämpfer nach Anspruch 5,
dadurch gekennzeichnet, dass das den Lautsprecher (2) aufnehmende Gehäuse (8) derart auf dem Gehäuse (7) fixiert ist, dass sich der zwischen den beiden Gehäusen vorhandene Kühlspalt (22) im Wesentlichen über den gesamten Bereich des Bodens (20) des Gehäuses (8) bzw. der oberen Gehäusewand (15) des Gehäuses (7) erstreckt. - Abgasschalldämpfer nach Anspruch 6,
dadurch gekennzeichnet, dass der Kühlspalt (22) von Kühlluft durchströmbar ist. - Abgasschalldämpfer nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet, dass der Lautsprecher (2) ein elektrodynamischer Lautsprecher ist. - Abgasschalldämpfer nach Anspruch 8,
dadurch gekennzeichnet, dass der Magnet (27) des Lautsprechers (2) mit der Wand des zweiten Gehäuses in Wärmekontakt steht. - Abgasschalldämpfer nach Anspruch 8,
dadurch gekennzeichnet, dass der Magnet (27) des Lautsprechers (2) durch eine Öffnung (28) in der Wand des zweiten Gehäuses (8) hindurchragt. - Abgasschalldämpfer nach Anspruch 10,
dadurch gekennzeichnet, dass der Magnet (27) eine den Lautsprecherinnenraum mit der Atmosphäre verbindende Durchgangsbohrung (29) aufweist, - Abgasschalldämpfer nach einem der Ansprüche 1 bis 11
dadurch gekennzeichnet, dass der sich an die Schallkopplungsstelle (5) anschliessende, innerhalb des Gehäuses (7) angeordnete Abschnitt (41) des Abgasrohres (6) eine einen Luftspalt einschliessende Doppelwand aufweist. - Abgasschalldämpfer nach Anspruch 12,
gekennzeichnet durch,
ein die Durchgangsbohrung (29) in Ein- oder Ausströmrichtung sperrendes Rückschlagventil (36). - Abgasschalldämpfer nach einem der Ansprüche 11 bis 13,
dadurch gekennzeichnet, dass die Durchgangsohrung (29) über eine Leitung (37) mit einem spritzwassergeschützten Luftvolumen verbunden ist. - Abgasschalldämpfer nach einem der Ansprüche 6 bis 8 und 10 bis 14,
dadurch gekennzeichnet, dass das zweite Gehäuse (8) aus einem Kunststoff besteht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19922897 | 1999-05-19 | ||
DE19922897 | 1999-05-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1055804A1 EP1055804A1 (de) | 2000-11-29 |
EP1055804B1 true EP1055804B1 (de) | 2003-03-12 |
Family
ID=7908472
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110585A Withdrawn EP1059830A3 (de) | 1999-05-19 | 2000-05-18 | Elektrodynamischer Lautsprecher mit einer Regeleinrichtung für einen aktiven Kraftfahrzeug-Schalldämpfer |
EP00110736A Expired - Lifetime EP1055804B1 (de) | 1999-05-19 | 2000-05-19 | Aktiver Abgasschalldämpfer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110585A Withdrawn EP1059830A3 (de) | 1999-05-19 | 2000-05-18 | Elektrodynamischer Lautsprecher mit einer Regeleinrichtung für einen aktiven Kraftfahrzeug-Schalldämpfer |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP1059830A3 (de) |
DE (1) | DE50001427D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006042224B3 (de) * | 2006-09-06 | 2008-01-17 | J. Eberspächer GmbH & Co. KG | Aktiver Schalldämpfer für eine Abgasanlage |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004040421A1 (de) * | 2004-08-19 | 2006-03-09 | J. Eberspächer GmbH & Co. KG | Aktiver Abgasschalldämpfer |
DE102008018085A1 (de) | 2008-04-09 | 2009-10-15 | J. Eberspächer GmbH & Co. KG | Aktiver Schalldämpfer |
DE102009049280B4 (de) | 2009-10-13 | 2016-10-06 | Eberspächer Exhaust Technology GmbH & Co. KG | Aktiver Schalldämpfer |
DE202012012724U1 (de) | 2011-06-01 | 2013-09-11 | Eberspächer Exhaust Technology GmbH & Co. KG | Antischall-System für Abgasanlagen |
DE102011106647A1 (de) | 2011-07-05 | 2013-01-10 | J. Eberspächer GmbH & Co. KG | Antischall-system für abgasanlagen und verfahren zum steuern desselben |
DE102011117495B4 (de) | 2011-11-02 | 2014-08-21 | Eberspächer Exhaust Technology GmbH & Co. KG | Überlastungsschutz für Lautsprecher in Abgasanlagen |
DE102011117807A1 (de) * | 2011-11-07 | 2013-05-08 | Friedrich Boysen Gmbh & Co. Kg | Schalldämpfungseinrichtung |
US9386366B2 (en) | 2011-12-02 | 2016-07-05 | Eberspächer Exhaust Technology GmbH & Co. KG | Active design of exhaust sounds |
DE102011089774B4 (de) * | 2011-12-23 | 2014-03-27 | Eberspächer Exhaust Technology GmbH & Co. KG | Abgasanlage |
DE102012005893A1 (de) * | 2012-03-23 | 2013-09-26 | Audi Ag | Verfahren zum Betreiben einer Lautsprechereinrichtung, Lautsprechereinrichtung sowie Vorrichtung zur Lärmkompensation |
DE102012109872B4 (de) | 2012-10-16 | 2015-08-27 | Eberspächer Exhaust Technology GmbH & Co. KG | Lautsprecher mit verbesserter thermischer Belastbarkeit |
DE102013104307A1 (de) | 2013-04-26 | 2014-10-30 | Eberspächer Exhaust Technology GmbH & Co. KG | System zur Beeinflussung von Abgasgeräuschen und/oder Ansauggeräuschen und/oder Motorgeräuschen |
EP2797075B1 (de) | 2013-04-26 | 2018-09-12 | Eberspächer Exhaust Technology GmbH & Co. KG | System zur Beeinflussung von Abgasgeräuschen, Motorgeräuschen und/oder Ansauggeräuschen |
DE102013208186B4 (de) * | 2013-05-03 | 2016-09-22 | Eberspächer Exhaust Technology GmbH & Co. KG | Schallerzeuger für eine Abgasanlage |
DE102013104810A1 (de) | 2013-05-08 | 2014-11-13 | Eberspächer Exhaust Technology GmbH & Co. KG | Schallerzeuger für ein antischall-system zur beeinflussung von abgasgeräuschen und/oder ansauggeräuschen eines kraftfahrzeugs |
DE102013010609B4 (de) | 2013-06-25 | 2023-07-27 | Purem GmbH | System zur Beeinflussung von Abgasgeräuschen in einer mehrflutigen Abgasanlage und Kraftfahrzeug |
DE102013011937B3 (de) * | 2013-07-17 | 2014-10-09 | Eberspächer Exhaust Technology GmbH & Co. KG | Schallerzeuger für ein Antischall-System zur Beeinflussung von Abgasgeräuschen und/oder Ansauggeräuschen eines Kraftfahrzeugs |
DE102013217849A1 (de) * | 2013-09-06 | 2015-03-12 | Friedrich Boysen Gmbh & Co. Kg | Aktive Schallerzeugungseinrichtung |
EP2915967B1 (de) | 2014-03-04 | 2017-08-02 | Eberspächer Exhaust Technology GmbH & Co. KG | Aktives Design von Auspuffgeräuschen |
DE102015119191A1 (de) | 2015-11-06 | 2017-05-11 | Eberspächer Exhaust Technology GmbH & Co. KG | Schallerzeuger zur Befestigung an einem Fahrzeug zur Beeinflussung von Geräuschen des Fahrzeugs |
US11012788B2 (en) | 2018-03-27 | 2021-05-18 | Sony Corporation | Loudspeaker system |
EP3547713B1 (de) | 2018-03-27 | 2023-11-22 | Sony Group Corporation | Lautsprecher mit einem akustischen wellenleiter und verfahren |
DE102018109529B4 (de) * | 2018-04-20 | 2019-11-28 | Tenneco Gmbh | Halteflansch für Dosierventil |
CN113153493B (zh) * | 2021-04-26 | 2023-03-28 | 吉林大学 | 一种用于内燃机的排气消声器 |
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US3014096A (en) * | 1956-05-29 | 1961-12-19 | Warner W Clements | Sound reproducing means |
US4243839A (en) * | 1977-12-14 | 1981-01-06 | Matsushita Electric Industrial Co., Ltd. | Transducer with flux sensing coils |
GB2083974A (en) * | 1980-09-04 | 1982-03-31 | Rank Organisation The Ltd | Moving coil loudspeaker |
GB2196815B (en) * | 1986-09-25 | 1989-01-11 | David Robin Birt | Motional feedback system for loudspeakers |
US5044464A (en) * | 1990-01-23 | 1991-09-03 | Nelson Industries, Inc. | Active acoustic attenuation mixing chamber |
US5319165A (en) * | 1990-04-25 | 1994-06-07 | Ford Motor Company | Dual bandpass secondary source |
US5229556A (en) * | 1990-04-25 | 1993-07-20 | Ford Motor Company | Internal ported band pass enclosure for sound cancellation |
US5748749A (en) * | 1993-03-24 | 1998-05-05 | Noise Cancellation Technologies, Inc. | Active noise cancelling muffler |
US5541373A (en) * | 1994-09-06 | 1996-07-30 | Digisonix, Inc. | Active exhaust silencer |
-
2000
- 2000-05-18 EP EP00110585A patent/EP1059830A3/de not_active Withdrawn
- 2000-05-19 EP EP00110736A patent/EP1055804B1/de not_active Expired - Lifetime
- 2000-05-19 DE DE50001427T patent/DE50001427D1/de not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006042224B3 (de) * | 2006-09-06 | 2008-01-17 | J. Eberspächer GmbH & Co. KG | Aktiver Schalldämpfer für eine Abgasanlage |
EP1898059A2 (de) | 2006-09-06 | 2008-03-12 | J. Eberspächer GmbH & Co. KG | Aktiver Schalldämpfer für eine Abgasanlage |
Also Published As
Publication number | Publication date |
---|---|
EP1059830A3 (de) | 2003-12-17 |
EP1059830A2 (de) | 2000-12-13 |
EP1055804A1 (de) | 2000-11-29 |
DE50001427D1 (de) | 2003-04-17 |
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