WO2003100765A1 - Device for modulating noise in a motor vehicle - Google Patents

Device for modulating noise in a motor vehicle Download PDF

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Publication number
WO2003100765A1
WO2003100765A1 PCT/EP2003/003480 EP0303480W WO03100765A1 WO 2003100765 A1 WO2003100765 A1 WO 2003100765A1 EP 0303480 W EP0303480 W EP 0303480W WO 03100765 A1 WO03100765 A1 WO 03100765A1
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WO
WIPO (PCT)
Prior art keywords
interior
motor vehicle
hollow body
sound
deflecting
Prior art date
Application number
PCT/EP2003/003480
Other languages
German (de)
French (fr)
Inventor
Marcus Hofmann
Roudolf Starobinski
Original Assignee
Daimlerchrysler Ag
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
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to EP03720416A priority Critical patent/EP1508138A1/en
Priority to JP2004508332A priority patent/JP2005527863A/en
Publication of WO2003100765A1 publication Critical patent/WO2003100765A1/en
Priority to US10/998,358 priority patent/US20050121255A1/en

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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 noise design in a motor vehicle according to the kind defined in the preamble of claim 1.
  • a generic device is known from DE 44 35 296 AI. Such devices are intended to provide the driver of the motor vehicle, particularly when accelerating, with increased transmission of the noises generated by the internal combustion engine, on the one hand to enable a more intense driving experience and on the other hand to pass on more information about the load state of the internal combustion engine.
  • the deflection element according to the invention By means of the deflection element according to the invention between the output line and the interior cladding element, the sound waves generated by the sound transmission device and introduced via the output line are deflected in the direction of the interior, thereby increasing the sound effect.
  • This amplified sound effect leads to an 'acting on the deflecting force which then stimulates due to the connection of the deflection element with the interior trim element, the latter to oscillations or vibrations and thus provides for further amplification of the sound effect.
  • the interior of the motor vehicle can be insulated considerably better to protect it from disturbing external noise, without withholding acoustic information about the load state of the internal combustion engine from the driver.
  • a decoupling of the output line from the deflecting element and a possibility thereby given to amplify the vibrations of the interior trim element caused by the sound can be achieved if, in an advantageous development of the invention, between the output line and the deflecting element is arranged a flexible connecting element.
  • the deflection element has a hollow body. This represents an additional possibility for influencing the sound frequencies emitted into the interior, the volume of the hollow body being able to be varied in this connection.
  • FIG. 1 shows a first embodiment of the device according to the invention
  • FIG. 2 shows a first development of the device from FIG. 1;
  • FIG. 3 shows a second development of the device from FIG. 1;
  • FIG. 4 shows a third development of the device from FIG. 1;
  • FIG. 5 shows a development of the device from FIG. 4.
  • FIG. 6 shows a fourth development of the device from FIG. 1.
  • FIG. 1 shows a gas-carrying line 1 of an internal combustion engine 2, which is only indicated, for example an exhaust gas line or an intake line.
  • an input line 3 leads to a device 4 for making noise in the motor vehicle, not shown in its entirety, in which the internal combustion engine 2 is arranged in a manner known per se.
  • the device 4 the basic structure and mode of operation of which may be known, for example, from DE 100 42 012 AI, has a hollow body 5, inside which a sound transmission device, which in the present case is designed as an oscillatable membrane 6, is arranged, which transmits the hollow body 5 into two rooms , namely an entrance room 7 and an exit room 8.
  • the input space 7 is connected to the input line 3 and the output space 8 to an output line 9, which leads into an interior 10 of the motor vehicle.
  • the output line 9 is connected via a deflection element 11 to an inner lining element 12, a flexible connecting element 13 being arranged between the output line 9 and the deflection element 11.
  • the deflecting element 11 is attached essentially rigidly to the interior trim element 12.
  • the interior trim element 12 is part of an entire interior trim 14 which at least partially lines the interior 10 in a manner not shown, but can also be part of a dashboard (not shown).
  • the deflecting element 11 which is made of plastic, for example, deflects the sound waves arriving via the output line 9, which leads to an acoustic flow and thus to an intensification of the sound effect in the interior 10 leads.
  • the deflection element 11 has an angle of substantially 90 ° to this, which has proven to be the most suitable for the amplification of the sound waves, which is explained in more detail below. In special installation cases, an angle of the deflecting element 11 different from 90 ° is of course also conceivable.
  • the interior trim element 12 Due to the reaction force or counterforce generated on the deflection element 11 due to the described acoustic flow and indicated by an arrow, the same applies a force to the interior trim element 12, which in turn causes it to oscillate or vibrate and thus generate its own sound. These vibrations of the interior trim element 12 further amplify the acoustic information described for the driver with regard to the load state of the internal combustion engine 2.
  • the interior trim element 12 is decoupled from the interior trim 14 in order to prevent the entire interior trim 14 from vibrating and the interior trim element 12 an independent possibility to provide vibration radiation. This makes it possible to equip the interior trim element 12 with a special geometry in order to achieve a further possibility for influencing the sound generation. However, this special geometry of the interior trim element 12 will not be discussed in more detail below.
  • FIG. 2 shows a development of the device 4 from FIG. 1.
  • an absorption material 15 is arranged at the exit of the device 4, that is to say at the transition of the deflecting element 11 into the interior 10, which influences the sound radiation into the interior 10.
  • the absorption material 15 can have an acoustic resistance of, for example, 40 rails. The acoustic resistance generated results in a further force which acts on the interior trim element 12.
  • FIG. 3 A further embodiment of the device 4 from FIG. 1 is shown in FIG. 3.
  • a constriction element 16 is arranged at the exit or transition into the interior 10, which can be connected to the interior trim element 12 or the deflection element 11 and extends into the interior 10 ,
  • the constriction element 16 By means of the constriction element 16, the flow velocity from the deflection element 11 into the interior 10 is increased and thus an increase in the acoustic flow described above is achieved, which leads to a higher resultant force on the deflection element 11 and thus also to greater vibration excitation of the interior trim element 12.
  • the deflection element 11 has a hollow body 17, which is connected via line elements 17a and 17b on the one hand via the flexible connecting element 13 to the outlet line 9 and on the other hand to the interior trim element 12.
  • a further influence on the sound waves generated or transmitted by the sound transmission device or membrane 6 is achieved by the hollow body 17, this influence of course being dependent on the shape and in particular on the volume of the hollow body 17 and can be determined by changing these sizes.
  • the hollow body 17 is connected to the interior trim element 12 by means of a rigid, rod-shaped connecting element 18.
  • FIG. 5 shows a development of the embodiment according to FIG. 4, in which case the hollow body 17 has two volumes, namely a first volume 19 and a second volume 20.
  • the first volume 19 is connected to the outlet line 9 via the line element 17a and the flexible connecting element 13 and the second volume 20 is connected to the interior trim element 12 via the line element 17b.
  • a further line element 17c is provided to connect the first volume 19 to the second volume 20.
  • the hollow body 17 is connected to the interior trim element 12 via the rigid connection element 18, for which purpose the connection element 18 runs from the interior trim element 12 to the first volume 19.
  • FIG. 6 shows a further embodiment of the device 4, which in this case has a widening element 21 at the exit into the interior 10, which, in contrast to the constriction element 16 according to FIG. 3, ensures a reduction in the reaction force on the deflection element 11 and thus likewise serves to influence the sound radiation in the interior 10.
  • FIGS. 1 to 6 All of the embodiments shown in FIGS. 1 to 6 can be combined with one another in any manner, provided that they are not obviously mutually exclusive.
  • the absorption material 15 can be provided in all embodiments and the decoupling of the interior trim element 12 from the interior trim 14 is also conceivable.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)

Abstract

Disclosed is a device for modulating noise in a motor vehicle, comprising a hollow body which is separated into at least two chambers by means of at least one sound-transmitting device. One chamber is connected to a gas-containing part of an internal combustion engine that is arranged in the motor vehicle while the other chamber is acoustically coupled to an interior space of the motor vehicle via an output pipe. Said output pipe is connected to an interior lining element via an essentially hollow redirecting element. Said redirecting element is configured in a rigid manner such that the redirecting element is able to transmit to the interior lining element force which is applied thereupon as a result of sound being reflected into the interior space.

Description

Vorrichtung zur Geräuschgestaltung bei einem Kraftfahrzeug Device for designing noise in a motor vehicle
Die Erfindung betrifft eine Vorrichtung zur Geräuschgestaltung bei einem Kraftfahrzeug nach der im Oberbegriff von Anspruch 1 näher definierten Art .The invention relates to a device for noise design in a motor vehicle according to the kind defined in the preamble of claim 1.
Eine gattungsgemäße Vorrichtung ist aus der DE 44 35 296 AI bekannt. Mit solchen Vorrichtungen sollen dem Fahrer des Kraftfahrzeugs insbesondere beim Beschleunigen die von der Brennkraftmaschine erzeugten Geräusche verstärkt übermittelt werden, um zum einen ein intensiveres Fahrerlebnis zu ermöglichen und zum anderen mehr Informationen über den Lastzustand der Brennkraftmaschine weiterzugeben.A generic device is known from DE 44 35 296 AI. Such devices are intended to provide the driver of the motor vehicle, particularly when accelerating, with increased transmission of the noises generated by the internal combustion engine, on the one hand to enable a more intense driving experience and on the other hand to pass on more information about the load state of the internal combustion engine.
Die Nachteile dieser bekannten Vorrichtung liegen jedoch in ihrem verhältnismäßig geringen Wirkungsgrad sowie dem sehr starren Übertragungsverhalten.However, the disadvantages of this known device are its relatively low efficiency and the very rigid transmission behavior.
In der DE 100 42 012 AI wurde versucht, diesen Wirkungsgrad der gesamten Vorrichtung zu verbessern. Allerdings wird auch dort noch keine optimale Lösung angeboten, insbesondere im Hinblick auf ein flexibleres Übertragungsverhalten.DE 100 42 012 AI tried to improve this efficiency of the entire device. However, an optimal solution is not yet offered there either, particularly with regard to more flexible transmission behavior.
Es ist daher Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur Geräuschgestaltung bei einem Kraftfahrzeug zu schaffen, mittels der eine Verbesserung des Übertragungsverhaltens der von der Brennkraftmaschine erzeugten Geräusche in den Innenraum des Kraftfahrzeugs erreichbar ist.It is therefore an object of the present invention to provide a device for designing noise in a motor vehicle create, by means of which an improvement in the transmission behavior of the noise generated by the internal combustion engine can be achieved in the interior of the motor vehicle.
Erfindungsgemäß wird diese Aufgabe durch die in Anspruch 1 genannten Merkmale gelöst .According to the invention, this object is achieved by the features mentioned in claim 1.
Durch das erfindungsgemäße Umlenkelement zwischen der Ausgangsleitung und dem Innenverkleidungselement werden die von der Schallübertragungseinrichtung erzeugten und über die Ausgangsleitung eingeleiteten Schallwellen in Richtung des Innenraums umgelenkt, wodurch eine Verstärkung der Schallwirkung erzielt wird. Diese verstärkte Schallwirkung führt zu einer auf das Umlenkelement ' wirkenden Kraft, die dann, aufgrund der Verbindung des Umlenkelements mit dem Innenverkleidungselement das letztere zu Schwingungen bzw. Vibrationen anregt und auf diese Weise für eine weitere Verstärkung der Schallwirkung sorgt.By means of the deflection element according to the invention between the output line and the interior cladding element, the sound waves generated by the sound transmission device and introduced via the output line are deflected in the direction of the interior, thereby increasing the sound effect. This amplified sound effect leads to an 'acting on the deflecting force which then stimulates due to the connection of the deflection element with the interior trim element, the latter to oscillations or vibrations and thus provides for further amplification of the sound effect.
Zu der Veränderung der Schallabstrahlung kommt also noch die vorteilhafte Wirkung der erzeugten Vibrationen des Innenver- kleidungselements, so daß mit der erfindungsgmäßen Vorrichtung insgesamt eine erheblich verbesserte Beeinflussung des Innenraumgeräusches möglich ist, wodurch dem Fahrer ermöglicht wird, den Lastzustand der Brennkraftmaschine akustisch wahrzunehmen.In addition to the change in the sound radiation, there is also the advantageous effect of the vibrations generated by the interior trim element, so that overall a considerably improved influence on the interior noise is possible with the device according to the invention, which enables the driver to perceive the load state of the internal combustion engine acoustically.
Der Innenraum des Kraftfahrzeugs kann dadurch zum Schutz vor störenden Außengeräuschen erheblich besser isoliert werden, ohne dem Fahrer akustische Informationen über den Lastzustand der Brennkraftmaschine vorzuenthalten.As a result, the interior of the motor vehicle can be insulated considerably better to protect it from disturbing external noise, without withholding acoustic information about the load state of the internal combustion engine from the driver.
Ein Abkoppeln der Ausgangsleitung von dem Umlenkelement und eine hierdurch gegebene Möglichkeit zur Verstärkung der durch den Schall hervorgerufenen Vibrationen des Innenverkleidungs- elements läßt sich erreichen, wenn in einer vorteilhaften Weiterbildung der Erfindung zwischen der Ausgangsleitung und dem Umlenk- element ein flexibles Verbindungselement angeordnet ist .A decoupling of the output line from the deflecting element and a possibility thereby given to amplify the vibrations of the interior trim element caused by the sound can be achieved if, in an advantageous development of the invention, between the output line and the deflecting element is arranged a flexible connecting element.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung kann vorgesehen sein, daß das Umlenkelement einen Hohlkörper aufweist. Dies stellt eine zusätzliche Möglichkeit zur Beeinflussung der in den Innenraum abgestrahlten Schallfrequenzen dar, wobei in diesem Zusammenhang das Volumen des Hohlkörpers variiert werden kann.In a further advantageous embodiment of the invention it can be provided that the deflection element has a hollow body. This represents an additional possibility for influencing the sound frequencies emitted into the interior, the volume of the hollow body being able to be varied in this connection.
Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den restlichen Unteransprüchen sowie aus den nachfolgend anhand der Zeichnung prinzipmäßig dargestellten Ausführungsbeispielen.Further advantageous refinements and developments of the invention result from the remaining subclaims and from the exemplary embodiments illustrated in principle below with reference to the drawing.
Es zeigt:It shows:
Fig. 1 eine erste Ausführungsform der erfindungsgemäßen Vorrichtung;1 shows a first embodiment of the device according to the invention;
Fig. 2 eine erste Weiterbildung der Vorrichtung aus Fig. 1;FIG. 2 shows a first development of the device from FIG. 1;
Fig. 3 eine zweite Weiterbildung der Vorrichtung aus Fig. 1;FIG. 3 shows a second development of the device from FIG. 1;
Fig. 4 eine dritte Weiterbildung der Vorrichtung aus Fig. 1;FIG. 4 shows a third development of the device from FIG. 1;
Fig. 5 eine Weiterbildung der Vorrichtung aus Fig. 4; und5 shows a development of the device from FIG. 4; and
Fig. 6 eine vierte Weiterbildung der Vorrichtung aus Fig. 1.6 shows a fourth development of the device from FIG. 1.
Fig. 1 zeigt eine gasführende Leitung 1 einer lediglich angedeuteten Brennkraftmaschine 2, also beispielsweise eine Abgasleitung oder eine Ansaugleitung. Von der gasführenden Leitung 1 führt eine Eingangsleitung 3 zu einer Vorrichtung 4 zur Geräuschgestaltung in dem in seiner Gesamtheit nicht dargestellten Kraftfahrzeug, in welchem die Brennkraftmaschine 2 in an sich bekannter Weise angeordnet ist. Die Vorrichtung 4, deren prinzipieller Aufbau und Wirkungsweise beispielsweise aus der DE 100 42 012 AI bekannt sein können, weist einen Hohlkörper 5 auf, in dessen Innerem eine im vorliegenden Falls als schwingfähige Membran 6 ausgebildete Schallübertragungseinrichtung angeordnet ist, die den Hohlkörper 5 in zwei Räume, nämlich einen Eingangsraum 7 und einen Ausgangsraum 8 teilt. Hiervon ist der Eingangsraum 7 mit der Eingangsleitung 3 und der Ausgangsraum 8 mit einer Ausgangsleitung 9 verbunden, die in einen Innenraum 10 des Kraftfahrzeugs führt.1 shows a gas-carrying line 1 of an internal combustion engine 2, which is only indicated, for example an exhaust gas line or an intake line. From the gas-carrying line 1, an input line 3 leads to a device 4 for making noise in the motor vehicle, not shown in its entirety, in which the internal combustion engine 2 is arranged in a manner known per se. The device 4, the basic structure and mode of operation of which may be known, for example, from DE 100 42 012 AI, has a hollow body 5, inside which a sound transmission device, which in the present case is designed as an oscillatable membrane 6, is arranged, which transmits the hollow body 5 into two rooms , namely an entrance room 7 and an exit room 8. Of this, the input space 7 is connected to the input line 3 and the output space 8 to an output line 9, which leads into an interior 10 of the motor vehicle.
Durch Schwingungen bzw. Schallwellen innerhalb der gasführenden Leitung 1, welche über die Eingangsleitung 3 in den Hohlkörper 5 eingeleitet werden, wird die Membran 6 zu Schwingungen angeregt, welche wiederum über die Ausgangsleitung 9 als Schallwellen in den Innenraum 10 eingeleitet werden. Auf diese Weise wird ein in dem Innenraum 10 sich befindlicher Fahrer des Kraftfahrzeugs akustisch über den Lastzustand der Brennkraftmaschine 2 informiert .Vibrations or sound waves within the gas-carrying line 1, which are introduced into the hollow body 5 via the input line 3, excite the membrane 6, which in turn are introduced into the interior 10 as sound waves via the output line 9. In this way, a driver of the motor vehicle located in the interior 10 is acoustically informed about the load state of the internal combustion engine 2.
Die Ausgangsleitung 9 ist über ein Umlenkelement 11 mit einem Innenverkleidungselement 12 verbunden, wobei zwischen der Ausgangsleitung 9 und dem Umlenkelement 11 ein flexibles Verbindungselement 13 angeordnet ist . Auf der dem flexiblen Verbindungselement 13 gegenüberliegenden Seite ist das Umlenkelement 11 im wesentlichen starr an dem Innenverkleidungselement 12 angebracht. Das Innenverkleidungselement 12 ist Teil einer gesamten Innenverkleidung 14, die den Innenraum 10 in nicht dargestellter Weise wenigstens teilweise auskleidet, kann jedoch auch Teil eines nicht dargestellten Armaturenbretts sein.The output line 9 is connected via a deflection element 11 to an inner lining element 12, a flexible connecting element 13 being arranged between the output line 9 and the deflection element 11. On the side opposite the flexible connecting element 13, the deflecting element 11 is attached essentially rigidly to the interior trim element 12. The interior trim element 12 is part of an entire interior trim 14 which at least partially lines the interior 10 in a manner not shown, but can also be part of a dashboard (not shown).
Durch das beispielsweise aus Kunststoff bestehende Umlenkelement 11 werden die über die Ausgangsleitung 9 ankommenden Schallwellen umgelenkt, was zu einer akustischen Strömung und damit zu einer Verstärkung der Schallwirkung in dem Innenraum 10 führt. Im vorliegenden Fall weist das Umlenkelement 11 hierzu einen Winkel von im wesentlichen 90° auf, der sich als am geeignetsten für die nachfolgend näher erläuterte Verstärkung der Schallwellen erwiesen hat. In besonderen Einbaufällen ist selbstverständlich auch ein von 90° verschiedener Winkel des Umlenkelements 11 denkbar.The deflecting element 11, which is made of plastic, for example, deflects the sound waves arriving via the output line 9, which leads to an acoustic flow and thus to an intensification of the sound effect in the interior 10 leads. In the present case, the deflection element 11 has an angle of substantially 90 ° to this, which has proven to be the most suitable for the amplification of the sound waves, which is explained in more detail below. In special installation cases, an angle of the deflecting element 11 different from 90 ° is of course also conceivable.
Durch die aufgrund der beschriebenen akustischen Strömung erzeugte und mit einem Pfeil angedeutete Reaktionskraft bzw. Gegenkraft auf das Umlenkelement 11 bringt dasselbe eine Kraft auf das Innenverkleidungselement 12 auf, was dieses wiederum zu Schwingungen bzw. Vibrationen und damit zu einer eigenen Schallerzeugung bewegt . Diese Vibrationen des Innenverkleidungselements 12 verstärken noch die beschriebenen akustischen Informationen für den Fahrer bezüglich des Lastzustandes der Brennkraftmaschine 2. Im vorliegenden Fall ist das Innenverkleidungselement 12 von der Innenverkleidung 14 abgekoppelt, um ein Vibrieren der gesamten Innenverkleidung 14 zu verhindern und dem Innenverkleidungselement 12 eine eigenständige Möglichkeit zur Schwin- gungsabstrahlung zu bieten. Dadurch ist es möglich, das Innenverkleidungselement 12 mit einer besonderen Geometrie auszustatten, um eine weitere Möglichkeit zur Beeinflussung der Schallerzeugung zu erreichen. Auf diese spezielle Geometrie des Innenverkleidungselements 12 soll im folgenden jedoch nicht näher eingegangen werden.Due to the reaction force or counterforce generated on the deflection element 11 due to the described acoustic flow and indicated by an arrow, the same applies a force to the interior trim element 12, which in turn causes it to oscillate or vibrate and thus generate its own sound. These vibrations of the interior trim element 12 further amplify the acoustic information described for the driver with regard to the load state of the internal combustion engine 2. In the present case, the interior trim element 12 is decoupled from the interior trim 14 in order to prevent the entire interior trim 14 from vibrating and the interior trim element 12 an independent possibility to provide vibration radiation. This makes it possible to equip the interior trim element 12 with a special geometry in order to achieve a further possibility for influencing the sound generation. However, this special geometry of the interior trim element 12 will not be discussed in more detail below.
Fig. 2 zeigt eine Weiterbildung der Vorrichtung 4 aus Fig. 1. Hierbei ist am Ausgang der Vorrichtung 4, also am Übergang des Umlenkelements 11 in den Innenraum 10, ein Absorptionsmaterial 15 angeordnet, welches die Schallabstrahlung in den Innenraum 10 beeinflußt. Das Absorptionsmaterial 15 kann einen akustischen Widerstand von beispielsweise 40 Rail aufweisen. Durch den erzeugten akustischen Widerstand ergibt sich eine weitere Kraft, die auf das Innenverkleidungselement 12 wirkt . Eine weitere Ausgestaltung der Vorrichtung 4 aus Fig. 1 zeigt Fig. 3. Hierbei ist am Ausgang bzw. Übergang in den Innenraum 10 ein Verengungselement 16 angeordnet, welches mit dem Innenverkleidungselement 12 oder dem Umlenkelement 11 verbunden sein kann und sich in den Innenraum 10 erstreckt. Durch das Verengungselement 16 wird die Strömungsgeschwindigkeit aus dem Umlenkelement 11 in den Innenraum 10 erhöht und damit eine Verstärkung der oben beschriebenen akustischen Strömung erreicht, was zu einer höheren resultierenden Kraft an dem Umlenkelement 11 und somit auch zu einer stärkeren Schwingungsanregung des Innenverkleidungselements 12 führt.FIG. 2 shows a development of the device 4 from FIG. 1. Here, an absorption material 15 is arranged at the exit of the device 4, that is to say at the transition of the deflecting element 11 into the interior 10, which influences the sound radiation into the interior 10. The absorption material 15 can have an acoustic resistance of, for example, 40 rails. The acoustic resistance generated results in a further force which acts on the interior trim element 12. A further embodiment of the device 4 from FIG. 1 is shown in FIG. 3. A constriction element 16 is arranged at the exit or transition into the interior 10, which can be connected to the interior trim element 12 or the deflection element 11 and extends into the interior 10 , By means of the constriction element 16, the flow velocity from the deflection element 11 into the interior 10 is increased and thus an increase in the acoustic flow described above is achieved, which leads to a higher resultant force on the deflection element 11 and thus also to greater vibration excitation of the interior trim element 12.
In Fig. 4 ist eine weitere Ausführung der Vorrichtung 4 dargestellt, wobei in diesem Fall das Umlenkelement 11 einen Hohlkörper 17 aufweist, der über Leitungselemente 17a und 17b einerseits über das flexible Verbindungselement 13 mit der Ausgangsleitung 9 und andererseits mit dem Innenverkleidungselement 12 verbunden ist. Durch den Hohlkörper 17 wird eine weitere Beeinflussung der von der Schallübertragungseinrichtung bzw. Membran 6 erzeugten bzw. weitergeleiteten Schallwellen erreicht, wobei diese Beeinflussung selbstverständlich von der Form und insbesondere von dem Volumen des Hohlkörpers 17 abhängig ist und durch Veränderung dieser Größen festgelegt werden kann. Um auch in diesem Fall eine Schwingungsanregung des Innenverkleidungselements 12 zu erreichen, ist der Hohlkörper 17 mittels eines starren, stabförmigen Verbindungselements 18 mit dem Innenverkleidungselement 12 verbunden.4 shows a further embodiment of the device 4, in which case the deflection element 11 has a hollow body 17, which is connected via line elements 17a and 17b on the one hand via the flexible connecting element 13 to the outlet line 9 and on the other hand to the interior trim element 12. A further influence on the sound waves generated or transmitted by the sound transmission device or membrane 6 is achieved by the hollow body 17, this influence of course being dependent on the shape and in particular on the volume of the hollow body 17 and can be determined by changing these sizes. In order to achieve vibration excitation of the interior trim element 12 in this case as well, the hollow body 17 is connected to the interior trim element 12 by means of a rigid, rod-shaped connecting element 18.
Fig. 5 zeigt eine Weiterbildung der Ausführungsform gemäß Fig. 4, wobei in diesem Fall der Hohlkörper 17 zwei Volumina, nämlich ein erstes Volumen 19 und ein zweites Volumen 20 aufweist. Hierbei ist das erste Volumen 19 über das Leitungselement 17a und das flexible Verbindungselement 13 mit der Ausgangsleitung 9 und das zweite Volumen 20 über das Leitungs- element 17b mit dem Innenverkleidungselement 12 verbunden. Zur Verbindung des ersten Volumens 19 mit dem zweiten Volumen 20 ist ein weiteres Leitungselement 17c vorgesehen. Auch in diesem Fall ist der Hohlkörper 17 über das starre Verbindungselement 18 mit dem Innenverkleidungselement 12 verbunden, wozu das Verbindungselement 18 von dem Innenverkleidungselement 12 zu dem ersten Volumen 19 verläuft.FIG. 5 shows a development of the embodiment according to FIG. 4, in which case the hollow body 17 has two volumes, namely a first volume 19 and a second volume 20. Here, the first volume 19 is connected to the outlet line 9 via the line element 17a and the flexible connecting element 13 and the second volume 20 is connected to the interior trim element 12 via the line element 17b. To connect the first volume 19 to the second volume 20, a further line element 17c is provided. In this case too, the hollow body 17 is connected to the interior trim element 12 via the rigid connection element 18, for which purpose the connection element 18 runs from the interior trim element 12 to the first volume 19.
Fig. 6 zeigt eine weitere Ausfuhrungsform der Vorrichtung 4, welche in diesem Fall am Ausgang in den Innenraum 10 ein Verbreiterungselement 21 aufweist, das im Gegensatz zu dem Verengungselement 16 gemäß Fig. 3 für eine Verringerung der Reaktionskraft auf das Umlenkelement 11 sorgt und somit ebenfalls zu einer Beeinflussung der Schallabstrahlung in den Innenraum 10 dient.FIG. 6 shows a further embodiment of the device 4, which in this case has a widening element 21 at the exit into the interior 10, which, in contrast to the constriction element 16 according to FIG. 3, ensures a reduction in the reaction force on the deflection element 11 and thus likewise serves to influence the sound radiation in the interior 10.
Sämtliche in den Figuren 1 bis 6 dargestellten Ausführungsformen können in beliebiger Weise miteinander kombiniert werden, falls sie sich nicht in offensichtlicher Weise gegenseitig ausschließen. So kann beispielsweise das Absorptionsmaterial 15 in sämtlichen Ausfuhrungsformen vorgesehen sein und es ist auch jeweils die Abkopplung des Innenverkleidungselements 12 von der Innenverkleidung 14 denkbar. All of the embodiments shown in FIGS. 1 to 6 can be combined with one another in any manner, provided that they are not obviously mutually exclusive. For example, the absorption material 15 can be provided in all embodiments and the decoupling of the interior trim element 12 from the interior trim 14 is also conceivable.

Claims

Patentansprüche claims
1. Vorrichtung zur Geräuschgestaltung bei einem Kraftfahrzeug, mit einem Hohlkörper, welcher durch wenigstens eine Schallübertragungseinrichtung in wenigstens zwei Räume geteilt ist, wobei ein Raum mit einem gasführenden Teil einer in dem Kraft ahrzeug angeordneten Brennkraftmaschine in Verbindung steht, und wobei der andere Raum an einen Innenraum des Kraftfahrzeugs über eine Ausgangsleitung akustisch angekoppelt ist, dadurch gekennze ichnet , daß die Ausgangsleitung (9) über ein im wesentlich hohl ausgebildetes Umlenkelement (11) mit einem Innenverkleidungselement (12) verbunden ist, wobei das Umlenkelement (11) derart starr ausgebildet ist, daß es in der Lage ist, aufgrund der Schallabstrahlung in den Innenraum (10) auf dasselbe aufgebrachte Kräfte auf das Innenverkleidungselement (12) zu übertragen.1. A device for noise control in a motor vehicle, with a hollow body which is divided by at least one sound transmission device into at least two rooms, one room being connected to a gas-carrying part of an internal combustion engine arranged in the motor vehicle, and the other room being connected to one The interior of the motor vehicle is acoustically coupled via an output line, characterized in that the output line (9) is connected to an interior trim element (12) via an essentially hollow deflection element (11), the deflection element (11) being of such a rigid design, that it is able, due to the sound radiation in the interior (10) to transmit the same forces applied to the interior trim element (12).
2. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß zwischen der Ausgangsleitung (9) und dem Umlenkelement (11) ein flexibles Verbindungselement (13) angeordnet ist .2. Device according to claim 1, that a flexible connection element (13) is arranged between the output line (9) and the deflecting element (11).
3. Vorrichtung nach Anspruch 1 oder 2 , d a d u r c h g e k e n n z e i c h n e t , daß am Übergang des Umlenkelements (11) in den Innenraum (10) ein Absorptionsmaterial (15) angeordnet ist.3. Apparatus according to claim 1 or 2, characterized in that at the transition of the deflecting element (11) into the interior (10) an absorption material (15) is arranged.
4. Vorrichtung nach einem der Ansprüche 1, 2 oder 3, da du r c h g e k e nn z e i c hn e t , daß am Übergang von dem Umlenkelement (11) in den Innenraum (10) ein Verengungselement (16) angeordnet ist.4. Device according to one of claims 1, 2 or 3, since you r c h g e k e nn z e i c hn e t that a constriction element (16) is arranged at the transition from the deflecting element (11) into the interior (10).
5. Vorrichtung nach einem der Ansprüche 1, 2 oder 3, dadur c h g e k e nn z e i c hn e t , daß am Übergang von dem Umlenkelement (11) in den Innenraum (10) ein Verbreiterungselement (21) angeordnet ist.5. Device according to one of claims 1, 2 or 3, so that a widening element (21) is arranged at the transition from the deflecting element (11) into the interior (10).
6. Vorrichtung nach einem der Ansprüche 1 bis 5, da du r c h g e k e nn z e i c hn e t , daß das Umlenkelement (11) einen Winkel von wenigstens annähernd 90° aufweist.6. Device according to one of claims 1 to 5, since you r c h g e k e nn z e i c hn e t that the deflecting element (11) has an angle of at least approximately 90 °.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadu r c h g e ke nn z e i c hn e t , daß das Innenverkleidungselement (12) von einer den Innenraum (10) wenigstens teilweise auskleidenden Innenverkleidung (14) oder einem in dem Innenraum (10) angeordneten Armaturenbrett akustisch abgekoppelt ist.7. Device according to one of claims 1 to 6, dadu rchge ke nn zeic hn et that the interior lining element (12) of an interior lining (14) at least partially lining the interior (10) or a dashboard arranged in the interior (10) acoustically is uncoupled.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, da du r c h g e ke nn z e i c hn e t , daß das Umlenkelement (11) einen Hohlkörper (17) aufweist.8. Device according to one of claims 1 to 7, since you r c h g e ke nn z e i c hn e t that the deflecting element (11) has a hollow body (17).
9. Vorrichtung nach Anspruch 8, dadurch gekennze i chnet , daß der Hohlkörper (17) zwei separate, miteinander verbundenen Volumina (19,20) aufweist.9. The device according to claim 8, characterized in that the hollow body (17) has two separate, interconnected volumes (19, 20).
10. Vorrichtung nach Anspruch 8 oder 9, dadur c h g e kenn z e i chn e t , daß der Hohlkörper (17) über wenigstens ein starres Verbindungselement (18) mit dem Innenverkleidungselement (12) verbunden ist. 10. The device according to claim 8 or 9, characterized by the fact that the hollow body (17) has at least one rigid connecting element (18) with the inner lining element (12). connected is.
PCT/EP2003/003480 2002-05-29 2003-04-03 Device for modulating noise in a motor vehicle WO2003100765A1 (en)

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EP03720416A EP1508138A1 (en) 2002-05-29 2003-04-03 Device for modulating noise in a motor vehicle
JP2004508332A JP2005527863A (en) 2002-05-29 2003-04-03 Device for correcting sounds in automobiles
US10/998,358 US20050121255A1 (en) 2002-05-29 2004-11-27 Device for establishing noise in a motor vehicle

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DE10223872.3 2002-05-29
DE2002123872 DE10223872A1 (en) 2002-05-29 2002-05-29 Device for noise shaping in a motor vehicle

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JP2005527863A (en) 2005-09-15
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