EP1371056B2 - Dispositif de transmission du son pour un vehicule automobile - Google Patents

Dispositif de transmission du son pour un vehicule automobile Download PDF

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Publication number
EP1371056B2
EP1371056B2 EP02724120A EP02724120A EP1371056B2 EP 1371056 B2 EP1371056 B2 EP 1371056B2 EP 02724120 A EP02724120 A EP 02724120A EP 02724120 A EP02724120 A EP 02724120A EP 1371056 B2 EP1371056 B2 EP 1371056B2
Authority
EP
European Patent Office
Prior art keywords
resonator
transmission line
chambers
resonator chambers
sound
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
Application number
EP02724120A
Other languages
German (de)
English (en)
Other versions
EP1371056B1 (fr
EP1371056A1 (fr
Inventor
Reinhard Hoffmann
Kay Brodesser
Udo Lindner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Mahle Filtersysteme GmbH
Original Assignee
Bayerische Motoren Werke AG
Mahle Filtersysteme GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Bayerische Motoren Werke AG, Mahle Filtersysteme GmbH filed Critical Bayerische Motoren Werke AG
Publication of EP1371056A1 publication Critical patent/EP1371056A1/fr
Publication of EP1371056B1 publication Critical patent/EP1371056B1/fr
Application granted granted Critical
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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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes

Definitions

  • the invention relates to a device for targeted sound transmission from an intake tract of an internal combustion engine of a motor vehicle, in particular a passenger car, to an interior of the motor vehicle, having the features of the preamble of claim 1.
  • Such a sound transmission device is for example from the DE 199 22 216 A1 known and has a hollow transmission line, which is connected on the input side communicating with the intake tract of the internal combustion engine and to which a resonator chamber is connected.
  • This resonator chamber is tuned to a specific frequency or to a specific frequency band and is thereby aligned so that it emits a sound supplied via the transmission line to the vehicle interior.
  • the present invention is concerned with the problem of specifying an embodiment for a sound transmission device of the type mentioned, in which the possibility for the targeted generation of a desired sound effect or sound in the vehicle interior is improved.
  • a plurality of parallel-acting resonator chambers are provided, of which at least two differ from each other in terms of their frequency tuning.
  • the invention uses the knowledge that the sound transmission system of the device according to the invention operates with resonances, wherein resonance effects usually occur only in relatively narrow frequency ranges.
  • a plurality of different resonance frequencies can thus be utilized in order to generate the desired noise effect.
  • different frequencies of the sound generated by the internal combustion engine can be purposefully intensified in order to produce the desired sound impression in the vehicle interior.
  • the sound transmission paths from the intake tract to the individual resonator chambers can be formed as ⁇ / 2 resonators or have a section designed as a ⁇ / 2 resonator, with at least two differing from the ⁇ / 2 resonators with respect to their frequency tuning.
  • each resonator chamber is preceded by a ⁇ / 2 resonator, which allows additional frequency amplification to be achieved.
  • each resonator chamber may be associated with a membrane, which is excited to vibrate by the supplied sound.
  • at least one of the membranes in the associated resonator chamber separates an input-side first space from an output-side second space.
  • the first space forms a so-called "Helmholtz resonator" whose characteristics can be influenced by the volume of the second space.
  • At least two of the membranes may differ from one another with regard to their frequency tuning. Accordingly, there are many possibilities for frequency tuning of the individual resonator chambers.
  • switching means may be provided with which the individual resonator chambers can be activated and deactivated.
  • the individual resonator chambers can thereby be activated in succession, so that only one resonator chamber is always activated, while all the others are deactivated. It is also possible to activate several, in particular all, resonator chambers. Different combinations can be switched to generate different sound effects.
  • the switching means for activating or deactivating the individual resonator chambers are preferably actuated in such an internal combustion engine as a function of the respective switching state of the switching suction system. In this way, changes in the sound radiation characteristic of the internal combustion engine can be compensated and / or influenced when the shift intake system is switched such that a desired listening impression is produced in the vehicle interior in each switching state of the shift intake system.
  • an air intake tract 1 of an internal combustion engine 2 has an air filter 3 in which a filter element 4 separates a raw side 5 from a clean side 6.
  • a sound field is formed during the operation of the internal combustion engine 2, whose sound or noise characteristic correlates with a power provided by the internal combustion engine 2, in particular with its rotational speed.
  • the motor vehicle not shown otherwise, which is in particular a passenger car, preferably a sports car, has a in the FIGS. 2 and 3 illustrated sound transmission device 10th
  • an input side 11 of this sound transmission device 10 is preferably connected to the connecting line 7 of the intake tract 1.
  • the input side 11 ' is connected to the clean side 6 of the air filter 3.
  • the input side 11 '" may be connected to the raw side 5 of the air filter 3.
  • the input side 11 '''' upstream of the air filter 3 to connect to the raw side of the intake manifold 1.
  • Corresponding Fig. 2 has the sound transmission device 10 according to the invention, for example, three hollow transmission lines 12, which are connected here relatively close to each other to the connecting line 7. It is also possible that the various transmission lines 12 are connected at different points to the intake tract 1. For this purpose, reference is made to the connection possibilities of the input side 11 to 11 "", listed above by way of example.
  • Each transmission line 12 leads to a resonator chamber 13.
  • Each resonator chamber 13 is separated on the input side via a membrane 14 from the associated transmission line 12 in a gastight manner and connected on the output side to an outlet tube 15.
  • all outlet pipes 15 are connected to a common collector 16, which has a common sound outlet pipe 17 for all resonator chambers 13, which is here equipped with a funnel-shaped outlet 18.
  • This outlet 18 is positioned frontally in front of a partition wall 19, the so-called “bulkhead", which separates an engine compartment 20 from a vehicle interior 21. Accordingly, the sound transmission takes place through this partition 19 therethrough.
  • the individual sound transmission systems are preferably tuned with respect to different frequencies so as to realize a desired broadband effect for the sound transmission device 10. At least two of the resonator chambers 13 are accordingly designed differently with regard to their frequency tuning. For example, they differ in their volume.
  • the individual membranes 14 may be designed differently with respect to their frequency tuning each other. For example, the individual membranes can differ from each other in terms of their diameter. Likewise, different materials, different thicknesses and mass assignments can be selected.
  • the individual transmission lines 12 may differ from each other, for example with respect to their diameter and / or in terms of their length.
  • At least one of the transmission lines 12 is formed as a so-called " ⁇ / 2 resonator". If a plurality of transmission lines 12 are formed as ⁇ / 2 resonators, they may be formed with respect to different resonance frequencies.
  • Fig. 2 shows a preferred embodiment in which the sound transmission device 10 according to the invention comprises switching means 22 with which the individual sound transmission systems or the individual resonator chambers 13 can be activated and deactivated.
  • the switching means 22 in this case have in each transmission line 12 a flap 23 which is pivotally adjustable in each case by way of example about a pivot axis 24 extending perpendicular to the plane of the drawing.
  • actuators 25 are provided, each driving one of the flaps 23 for adjustment.
  • the individual actuators 25 are connected via corresponding control lines 26 with a controller 27 which actuates the individual actuators 25 in response to predetermined parameters.
  • each resonator chamber 13 is connected via a separate connecting line 28 to a common transmission line 29, which in turn is connected with its input side 11 to the intake tract 1, here to the air line 7.
  • the individual connection lines 28 may be connected to the common transmission line 29 at different locations 30 and 31. It is also possible for all connecting lines 28 to branch off from the common transmission line 29 at about the same point.
  • connection lines 28 may differ from one another, preferably with regard to their diameter and / or their length.
  • the connection lines 28 may also be formed as ⁇ / 2 resonator.
  • connection lines 28 or the resonator chambers 13 coupled thereto are designed to be switchable, that is, switching means 22 with flap 23 and actuator 25 are provided.
  • the flaps 23 can be pivoted to the cross section of the transmission line 12 (in the example according to FIG Fig. 2 ) or the connecting line 28 (in the example according to Fig. 3 ) to activate the respective resonator chamber 13 to open and close to deactivate the respective resonator 13. Accordingly, in Fig. 2 the upper and the middle resonator chamber 13 is activated while the lower resonator chamber 13 is deactivated. In contrast, in the embodiment according to Fig. 3 the upper and lower resonator chambers 13 are activated while the central resonator chamber 13 is deactivated.
  • resonator chambers 13 are different from those of Fig. 2 by the arrangement of the membranes 14.
  • the membranes are arranged within the resonator chambers 13, that the membrane 14 there separates an input-side first space 32 from an output-side second space 33.
  • the respective first space 32 forms a so-called "Helmholtz resonator".
  • the individual resonator chambers 13 may be configured differently with respect to their frequency tuning, wherein the individual sound transmission systems with respect to the configuration of the connecting lines 28, and the volumes of the resonator chambers 13 may differ from each other.
  • the membranes 14 may be formed differently.
  • Different frequency responses may also result from variations in the size of the first space 32 and / or the second space 33.
  • a damping body 34 may be used, for example, in the second chamber 33, which is formed for example of an open-cell foam. It is also possible to accommodate such a damping material in the respective outlet tube 15 or in the first space 32 or in the connecting line 28. By way of example, this damping body 34 is in Fig. 3 only used in the lower sound transmission system. Likewise, such or another damping material can also be arranged in the other sound transmission systems.
  • a diaphragm 35 is arranged in the sound outlet tube 17 of the upper sound transmission system whose diaphragm cross-section is smaller than the tube cross-section of the outlet tube 15.
  • each outlet pipe 15 has its own sound outlet 18; these are each positioned near the partition 19. Again, it is possible to arrange the sound exits 18 in or beyond the partition 19.
  • the sound transmission device 10 is designed to amplify different frequencies or frequency bands, there are relatively diverse design options for the generation and modulation of a desired engine sound in the vehicle interior 21.
  • the controller 27 can Actuate switching means 22, for example, depending on the current operating state of the internal combustion engine 2. It is possible to activate or deactivate the resonator chambers 13 individually. In particular, two or more resonator chambers can be activated in parallel. Likewise, all resonator chambers can be activated or deactivated. It is basically possible to design two of several sound transmission systems with respect to the same frequency, wherein in a first operating point only one of these sound transmission systems is active, while in a second operating point both sound transmission systems are activated in parallel in order to reinforce the assigned frequency again.
  • connection lines 28 of the upper and lower sound transmission system are connected to the common transmission line 29 so that they open substantially perpendicularly in this.
  • the connecting line 28 of the central sound transmission system is a coaxial extension of the common transmission line 29. In principle, however, other, in particular any, connection angle are possible.
  • connection lines 28 of the upper and lower sound transmission system can each be formed as a ⁇ / 2 resonator. Due to the aligned arrangement of the connection line 28 of the middle sound transmission system, this connection line 28 together with the common transmission line 29 also form a ⁇ / 2 resonator.
  • the collector 16 may be equipped with a plurality of, here two, common outlet pipes 17 'and 17 ", which differ in terms of their dimensions from one another.
  • Fig. 5 can in accordance with a development of the device 10 Fig. 3 at least one of the resonator chambers 13 with a plurality, here three, outlet tubes 15 ', 15''and15''' be equipped, which differ from each other in terms of their dimensions.
  • the characteristic of the radiated sound can be influenced within a resonator 13.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Exhaust Silencers (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (17)

  1. Dispositif pour la transmission de son rationnelle d'un circuit d'admission (1) d'un moteur à combustion interne (2) d'un véhicule automobile à un habitacle (21) du véhicule automobile,
    - comprenant au moins une conduite de transmission creuse (12 ; 29), qui est reliée de manière communicante au circuit d'admission (1) du côté entrée et à laquelle est raccordée au moins une chambre de résonance (13), qui rayonne le son dans l'habitacle (21) de véhicule automobile,
    - plusieurs chambres de résonance (13) agissant en parallèle sont prévues, dont au moins deux diffèrent l'une de l'autre quant à leur accord de fréquences,
    - les parcours de transmission de son du circuit d'admission (1) aux chambres de résonance (13) sont réalisés en tant que résonateurs λ/2 ou présentent une section réalisée en tant que résonateur λ/2,
    - au moins deux des résonateurs λ/2 différant l'un de l'autre quant à leur accord de fréquences.
  2. Dispositif suivant la revendication 1,
    caractérisé en ce
    que chaque chambre de résonance (13) est raccordée au circuit d'admission (1) par l'intermédiaire d'une conduite de transmission séparée (12).
  3. Dispositif suivant la revendication 1,
    caractérisé en ce
    que toutes les chambres de résonance (13) sont raccordées au circuit d'admission (1) par l'intermédiaire d'une conduite de transmission commune (29) de telle sorte que chaque chambre de résonance (13) est raccordée à la conduite de transmission commune (29) par l'intermédiaire d'une conduite de raccordement (28) séparée.
  4. Dispositif suivant la revendication 3,
    caractérisé en ce
    que les conduites de raccordement (28) sont raccordées en différents endroits (30, 31) à la conduite de transmission commune (29).
  5. Dispositif suivant l'une des les revendications 3 et 4,
    caractérisé en ce
    qu'au moins l'une des conduites de raccordement (28) est réalisée en tant que résonateur λ/2.
  6. Dispositif suivant l'une des revendications 3 et 4,
    caractérisé en ce
    qu'au moins l'une des conduites de raccordement (28) est réalisée avec la conduite de transmission commune (29) en tant que résonateur λ/2.
  7. Dispositif suivant l'une des revendications 1 à 6,
    caractérisé en ce
    qu'une membrane (14) est associée à chaque chambre de résonance (13).
  8. Dispositif suivant la revendication 7,
    caractérisé en ce
    qu'au moins l'une des membranes (14) sépare dans la chambre de résonance correspondante (13) un premier espace (32) du côté entrée d'un second espace (33) du côté sortie.
  9. Dispositif suivant l'une des revendications 7 et 8,
    caractérisé en ce
    qu'au moins deux des membranes (14) diffèrent l'une de l'autre quant à leur accord de fréquences.
  10. Dispositif suivant l'une des revendications 1 à 9,
    caractérisé en ce
    que les chambres de résonance (13) sont raccordées du côté sortie à un collecteur commun (16), par l'intermédiaire duquel les chambres de résonance (13) rayonnent le son dans l'habitacle (21) du véhicule automobile.
  11. Dispositif suivant l'une des revendications 1 à 10,
    caractérisé en ce
    que des moyens de commutation (22) sont prévus, avec lesquels au moins l'une des chambres de résonance (13) peut être activée ou désactivée.
  12. Dispositif suivant la revendication 11,
    caractérisé en ce
    que les moyens de commutation (22) présentent pour la commutation d'une chambre de résonance (13) un clapet (23), qui ouvre la section transversale de la conduite de transmission (12) ou de la conduite de raccordement (28) correspondante pour l'activation et la ferme pour la désactivation.
  13. Dispositif suivant l'une des revendications 11 et 12,
    caractérisé en ce
    que les moyens de commutation (22) connectent, déconnectent et interconnectent les chambres de résonance (13) en fonction de l'état de fonctionnement du moteur à combustion interne (2).
  14. Dispositif suivant l'une des revendications 11 à 13,
    caractérisé en ce
    que les moyens de commutation (22) dans un moteur à combustion interne (2), qui est équipé d'une installation d'admission commutable, connectent, déconnectent et interconnectent les chambres de résonance (13) en fonction de l'état de commutation de l'installation d'admission commutable .
  15. Dispositif suivant l'une des revendications 1 à 14,
    caractérisé en ce
    qu'au moins l'une des chambres de résonance (13) présente du côté sortie plusieurs tubes de sortie (15', 15" , 15"') de dimensions différentes.
  16. Dispositif au moins suivant la revendication 10,
    caractérisé en ce
    que le collecteur (16) présente plusieurs tubes de sortie communs (17', 17") de dimensions différentes.
EP02724120A 2001-03-23 2002-03-22 Dispositif de transmission du son pour un vehicule automobile Expired - Lifetime EP1371056B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10114397 2001-03-23
DE10114397A DE10114397A1 (de) 2001-03-23 2001-03-23 Schallübertragungsvorrichtung für ein Kraftfahrzeug
PCT/DE2002/001045 WO2002077969A1 (fr) 2001-03-23 2002-03-22 Dispositif de transmission de son pour vehicule automobile

Publications (3)

Publication Number Publication Date
EP1371056A1 EP1371056A1 (fr) 2003-12-17
EP1371056B1 EP1371056B1 (fr) 2005-08-03
EP1371056B2 true EP1371056B2 (fr) 2008-06-18

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ID=7678793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02724120A Expired - Lifetime EP1371056B2 (fr) 2001-03-23 2002-03-22 Dispositif de transmission du son pour un vehicule automobile

Country Status (5)

Country Link
US (1) US6848410B2 (fr)
EP (1) EP1371056B2 (fr)
DE (2) DE10114397A1 (fr)
ES (1) ES2246397T3 (fr)
WO (1) WO2002077969A1 (fr)

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Publication number Publication date
EP1371056B1 (fr) 2005-08-03
EP1371056A1 (fr) 2003-12-17
ES2246397T3 (es) 2006-02-16
WO2002077969A1 (fr) 2002-10-03
US20040094112A1 (en) 2004-05-20
US6848410B2 (en) 2005-02-01
DE50203827D1 (de) 2005-09-08
DE10114397A1 (de) 2002-09-26

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