EP1138887B1 - Transducteur acoustique pour les pulsations de gaz d'échappement - Google Patents

Transducteur acoustique pour les pulsations de gaz d'échappement Download PDF

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Publication number
EP1138887B1
EP1138887B1 EP01108092A EP01108092A EP1138887B1 EP 1138887 B1 EP1138887 B1 EP 1138887B1 EP 01108092 A EP01108092 A EP 01108092A EP 01108092 A EP01108092 A EP 01108092A EP 1138887 B1 EP1138887 B1 EP 1138887B1
Authority
EP
European Patent Office
Prior art keywords
acoustic transducer
transducer according
motor vehicle
exhaust gas
internal combustion
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
EP01108092A
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German (de)
English (en)
Other versions
EP1138887A3 (fr
EP1138887A2 (fr
Inventor
Anton Dr. Wolf
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.)
Woco Industrietechnik GmbH
Original Assignee
Woco Franz Josef Wolf and Co 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
Application filed by Woco Franz Josef Wolf and Co GmbH filed Critical Woco Franz Josef Wolf and Co GmbH
Publication of EP1138887A2 publication Critical patent/EP1138887A2/fr
Publication of EP1138887A3 publication Critical patent/EP1138887A3/fr
Application granted granted Critical
Publication of EP1138887B1 publication Critical patent/EP1138887B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

  • the invention relates to a sound transducer with a branching element, which has an exhaust system an internal combustion engine, in particular a motor vehicle, for branching of exhaust gas pulsations, and a transducer head, based on the exhaust gas pulsations can radiate airborne sound at least into the space of the internal combustion engine is.
  • the character of a motor vehicle is determined by a complex variety of perceptions certainly. Some of these perceptions are visual, others tangible and after all, some may be audible. This is from an internal combustion engine emitted sound from a mixture of its basic firing frequency, higher harmonics this frequency and resonances of all its components are determined. Since the beginning of In the last century, generations of automotive developers have been concerned the audible sound generated by a motor vehicle through targeted reduction condition, the developers for sound attenuation essentially three after different damper types acting physical principles are available, namely Helmholtz resonators, dissipation dampers and absorption dampers. For example from DE 196 15 917 A1 an intake silencer is known, while in the not previously published DE 199 48 146 describes an exhaust silencer.
  • JP 02248610 A describes a device for supplying exhaust gas noise Motor vehicle to the passenger interior of the same is known.
  • a resonator in operative connection with the exhaust system of the motor vehicle with the interposition of a Membrane, which has the same resonance frequency as the membrane To avoid filter effects of the membrane.
  • DE 197 46 523 A1 discloses a method for producing sound in motor vehicles. at This method uses a suitable sensor to determine the speed or load condition of an engine certainly.
  • the microphones installed in the passenger compartment prevailing sound signals recorded for the determination of transfer functions, To change the sound impression in the passenger compartment, you can add acoustic harmonics emitted by the motor determined by the transfer functions different order or parts thereof using loudspeakers in the passenger compartment be emitted.
  • the signals from the sensors and microphones are recorded using a AD converter, analyzed by means of a microprocessor, and the desired Output signal generated, which via a DA converter to those in the passenger compartment Speaker is guided.
  • WO 00/04532 describes a method and a device for generating noise in the interior of a motor vehicle depending on the operating state of an internal combustion engine known.
  • This device initially detects pressure fluctuations in the intake area the engine by means of a pressure sensor.
  • the output signal of the pressure sensor which representative of the speed and the load under which the engine is running is in an electronic Filter device processed, amplified in an amplifier and via loudspeakers reproduced in the interior of the motor vehicle.
  • the amplifier and the filter can be controlled via a modulation device.
  • This modulation device in turn is one with sensors for determining an accelerator pedal position Vehicle speed or a position of a shift lever connected. Because of this The modulation element becomes frequency components of the signal reproduced via the loudspeakers raised or lowered or a frequency multiplication of this, with respect to the input signal.
  • DE 44 35 296 A1 discloses a device in which the intake tract of an internal combustion engine branches off a pipe section of a motor vehicle.
  • This piece of pipe is with a Membrane to generate a desired noise spectrum, especially when accelerating of the motor vehicle.
  • the membrane closes on the side that a branch pipe facing away from the branch pipe, which pipe with at least one acoustic Resonator is provided.
  • This line pipe ends open in the engine compartment. About the tension the membrane becomes the resonance frequency of this, and thus the frequency of the emitted Sound waves, adapted to the respective internal combustion engine.
  • DE 197 04 376 A1 discloses which has an acoustic connection to the interior of the motor vehicle. This connection is made by a line which is tubular or hose-like can and is divided into two parts by a membrane. By adaptation the flexibility of the membrane and the geometric dimensions of one section of the line, which acts as a resonator, can generate the noise spectrum generated inside the driver's compartment be adapted to the engine.
  • DE 42 33 252 is a generic acoustic display device for generation an acoustic feedback for the vehicle driver known.
  • This display device comprises a mechanoacoustic transducer, which is in the form of a membrane on a free End of a pipe, which is located in the passenger compartment, can be executed.
  • the other end of the pipe is one with the main pipe of the intake or exhaust system Motors connected.
  • this tube there is a throttle element which is driven by a motor and is controlled via accelerator pedal movements. With the help of this throttle organ the amplitude of the feedback signal supplied to the passenger compartment during the Operation can be controlled.
  • a disadvantage of the devices known from the prior art is that the devices in which an acoustic signal is first converted into an electrical signal, then processed and then fed to the passenger compartment via loudspeakers, a control of the frequency characteristic of the output signal even during operation enable, but these devices are technically very complex. So these are Devices in the installation are time-consuming and costly and have an increased susceptibility to faults on. In contrast, the known devices have an additional purely mechano-acoustic Generate sound signal in the interior of the motor vehicle, the disadvantage that a Control of the output signal during operation is only possible in such a way that the Amplitude of the output signal is changed while the frequency characteristic during of the company remains unchanged.
  • a theft warning system for a motor vehicle in which in In the event of an unauthorized starting of a motor vehicle, exhaust noise intensifies as a warning signal be radiated from the motor vehicle.
  • a resonance body comes into active connection with an exhaust system for use.
  • the object of the present invention is therefore the generic device of this type to further develop the disadvantages of the prior art, in particular a structurally simple device for dynamic and sporty design the acoustics of an internal combustion engine is provided, which controls the frequency characteristic also while driving depending on the respective operating status the internal combustion engine.
  • this object is achieved by a modulation element via which the position of the transducer head is variable and that between the branch member and the Sonic transducer head is arranged.
  • the modulation element by the driver of the motor vehicle is adjustable and / or automatically controllable.
  • the transducer head is designed as a resonance body is, preferably comprising a support frame and a membrane clamped therein.
  • the transducer head at least partially can be placed in the space of the internal combustion engine and / or in the vehicle interior.
  • the frequency characteristic and / or amplitude of the radiated airborne sound can or can according to the invention by the coupling point of the branch member to the exhaust system, such as to a specific exhaust manifold area, an exhaust pipe or the like, the placement of the transducer head, the adjustment of the modulation element, the Geometry and / or dimensioning of the sound transducer, such as its tubes, of the resonance body of the transducer head or the like, and / or the elastic properties of the Membrane of the resonance body can be determined.
  • a valve which is preferably located between the modulation element and the transducer head is arranged, in particular for gradual addition or Switching off the sound transducer, preferably actuable by the driver of the motor vehicle and / or automatically controlled depending on the speed of the internal combustion engine and / or a noise level, outside and / or inside the motor vehicle his.
  • valve is connected to an audio system such as a stereo, a hands-free system or the like, coupled to the motor vehicle.
  • an audio system such as a stereo, a hands-free system or the like
  • Embodiments with at least one filter and / or an amplifier for setting, preferably regulating, the frequency characteristic and / or amplitude of the radiated airborne sound is proposed.
  • the filter and / or the amplifier higher harmonics Highlight or highlight the basic firing frequency of the internal combustion engine.
  • An attenuator can also be used to absorb selected mechanical vibrations be provided.
  • the modulation element is the filter, the amplifier and / or includes the attenuator.
  • the invention also proposes that the transducer head, the valve and / or the modulation element each have at least one electrical and / or electronic one Component, preferably controllable via a microcontroller, comprises or comprise.
  • the invention is therefore based on the surprising finding that through the use a modulation element between the branching element and the transducer head additionally, airborne sound in the frequency range, optionally available in the passenger compartment controlled the respective operating state in a simple manner during operation can be.
  • the frequency characteristic can also be connected to the sound transducer different coupling points of the exhaust system and use of further filters and Amplifiers can be adjusted.
  • the sound-emitting component in the form of a resonator-like one Acoustic transducer head with an integrated membrane can be used in many different ways Design as well as from different materials for further adjustment of the volume as well as the sound of a motor vehicle, the size and positioning of the transducer head in the engine compartment and / or in the vehicle interior also for coordination is relevant.
  • An exhaust system 2 is conventionally attached to an engine 1 of a motor vehicle, which in turn exhaust manifold branches 3, 3 ', 3 ", 3"', the number of which depends on the number of Cylinder of the engine 1 depends, and includes an exhaust pipe 4, among other things, as in Figure 1 shown.
  • a sound converter 10 according to the invention is attached to such an exhaust system 2 connectable, namely via a branch pipe, such as that connected to the exhaust pipe 4 and thus with the four exhaust manifold branches 3, 3 ', 3 "and 3"' connected branch pipe 11, the branch pipe 11 'connected to two exhaust manifold branches 3, 3' or the branch pipe 11 ′′ connected to an exhaust manifold branch 3, the branch pipe 11, 11 'or 11 "via a modulation element 12, a valve 13 and a guide tube 14 in turn connected to a transducer head 15 arranged in the motor area is.
  • a branch pipe such as that connected to the exhaust pipe 4 and thus with the four exhaust manifold branches 3, 3 ', 3 "and 3"' connected branch pipe 11, the branch pipe 11 'connected to two exhaust manifold branches 3, 3' or the branch pipe 11 ′′ connected to an exhaust manifold branch 3, the branch pipe 11, 11 'or 11 "via a modulation element 12, a valve 13 and a guide tube 14 in turn connected to a transducer head 15 arranged in
  • the coupling point of the branch pipe 11, 11 'or 11 "of the sound transducer 10 to the Exhaust system 2 determines the basic frequency of the exhaust gas pulsations of the engine 1, which in the Sound converter 10 is coupled.
  • Mechanical can be via the modulation element 12 Partially absorb vibrations, the position of the transducer head 15 in the engine compartment adjust and filter out frequencies in at least a first frequency range and in amplify at least a second frequency range.
  • the valve 13 allows the transducer 10, depending on the driver's wishes and also automatically depending on, for example, the condition of a stereo system, a hands-free system or the like or switch off.
  • the guide tube 14 can also be the frequency characteristic and / or Modulate the amplitude of the vibrations transferred in the transducer 10. Finally allows the configuration of the transducer head 15 as a resonance body further modulation the vibrations and a radiation of the set airborne sound.
  • FIGS. 2a, 2b and 2c show alternative configurations of the transducer head 15 a, 15b and 15c.
  • each transducer head 15a, 15b and 15c comprises a support frame 16a, 16b and 16c, in which a membrane 17a, 17b and 17c is clamped.
  • the material of the membrane 17a, 17b or 17c which is an elastomer, a plastic or Sheet metal can include, and the type of clamping the membrane 17a, 17b and 17c in the Carrier scaffold 16a, 16b and 16c can finally be the airborne sound to be radiated in his Adjust sound and volume.
  • the sound transducer according to the invention can also be electrical and electronic Components for further tuning the frequency characteristic and / or the level of the sound included.
  • the sound transducer according to the invention thus gives the possibility for the first time not only to attenuate certain frequency characteristics from the noise of a vehicle, but specifically desired sounds in a certain area of a vehicle, for example, under the bonnet to emit. It is not just an easy one Transfer of vibrations possible, but also processing them at the same time for setting an individually desired "sound”.
  • This "sound" is special Engine order dependent, including the possibility of suggesting a higher one Number of cylinders by, for example, a four-cylinder engine due to an eight-cylinder engine an emphasis on higher harmonics sounds.

Claims (12)

  1. Transducteur acoustique (10), comportant :
    un organe de ramification (11, 11',11") relié à un système de gaz d'échappement (2) d'un moteur à combustion interne (1), en particulier d'un véhicule automobile, pour évacuer par ramification les pulsations des gaz d'échappement, et
    une tête de transducteur acoustique (15, 15a, 15b, 15c), par l'intermédiaire de laquelle, en se basant sur les pulsations des gaz d'échappement, un bruit d'air peut être irradié au moins dans le compartiment du moteur à combustion interne (1), caractérisé par
    un organe de modulation (12), par l'intermédiaire duquel la position de la tête de transducteur acoustique (15, 15a, 15b, 15c) peut être modifiée et qui est disposé entre l'organe de ramification (11, 11',11") et la tête de transducteur acoustique (15, 15a, 15b, 15c).
  2. Transducteur acoustique selon la revendication 1, caractérisé en ce que l'organe de modulation (12) peut être réglé par le conducteur du véhicule automobile, ou bien être réglé automatiquement.
  3. Transducteur acoustique selon la revendication 1 ou 2, caractérisé en ce que la tête de transducteur acoustique (15, 15a, 15b, 15c) est réalisée sous la forme de corps de résonance, de préférence comprenant un bâti support (16a, 16b, 16c) ainsi qu'une membrane (17a, 17b, 17c) y étant enserrée.
  4. Transducteur acoustique selon l'une des revendications précédentes, caractérisé en ce que la tête de transducteur acoustique (15, 15a, 15b, 15c) est susceptible d'être placée au moins partiellement dans le compartiment du moteur à combustion interne (1) et/ou dans l'habitacle du véhicule.
  5. Transducteur acoustique selon l'une des revendications précédentes, caractérisé en ce que
    la caractéristique en fréquence et/ou l'amplitude du bruit d'air irradié au passage du point d'accouplement de l'organe de ramification (11, 11', 11") au système de gaz d'échappement (2), tel que comme sur une zone de coude de gaz d'échappement (3, 3',3", 3"') déterminée, une conduite de gaz d'échappement (4), ou analogues,
    le placement de la tête de transducteur acoustique (15, 15a, 15b, 15c), le réglage de l'organe de modulation (12), la géométrie et/ou le dimensionnement du transducteur acoustique (10), ainsi que de ses tubes (11, 11',11", 14), du corps de résonance de la tête de transducteur acoustique (15, 15a, 15b, 15c) ou analogues, et/ou les propriétés élastiques de la membrane (17a, 17b, 17c) du corps de résonance est, respectivement sont, déterminable(s).
  6. Transducteur acoustique selon l'une des revendications précédentes, caractérisé par une soupape (13), disposée de préférence entre l'organe de modulation (12) et la tête de transducteur acoustique (15, 15a, 15b, 15c), pour effectuer la mise en service ou hors service, en particulier par degrés, du transducteur acoustique (10), de préférence est actionnable par le conducteur du véhicule automobile et/ou est commandée automatiquement en fonction de la vitesse de rotation du moteur à combustion interne (1) et/ou d'un niveau de bruit, à l'extérieur et/ou à l'intérieur du véhicule automobile.
  7. Transducteur acoustique selon la revendication 6, caractérisé en ce que la soupape (13) est couplée à une installation audio, telle qu'une installation stéréo, une installation à mains libres ou analogues, du véhicule automobile.
  8. Transducteur acoustique selon l'une des revendications précédentes, caractérisé par au moins un filtre et/ou un amplificateur pour le réglage, de préférence la régulation, de la caractéristique en fréquence et/ou de l'amplitude du bruit aérien irradié.
  9. Transducteur acoustique selon la revendication 8, caractérisé en ce que le filtre et/ou l'amplificateur fait ou font ressortir les harmoniques supérieurs de la fréquence de combustion de base du moteur à combustion interne.
  10. Transducteur acoustique selon l'une des revendications précédentes, caractérisé par un organe d'amortissement, devant capter des vibrations mécaniques sélectionnées.
  11. Transducteur acoustique selon l'une des revendications 8 à 10, caractérisé en ce que l'organe de modulation (12) comprend le filtre, l'amplificateur et/ou l'organe d'amortissement.
  12. Transducteur acoustique selon l'une des revendications précédentes, caractérisé en ce que la tête de transducteur acoustique (15, 15a, 15b, 15c), la soupape (13) et/ou l'organe de modulation (12) comprend, respectivement comprennent chacun, au moins un composant électrique et/ou électronique, de préférence pouvant être commandé par l'intermédiaire d'un microcontrôleur.
EP01108092A 2000-03-29 2001-03-29 Transducteur acoustique pour les pulsations de gaz d'échappement Expired - Lifetime EP1138887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10015697 2000-03-29
DE10015697A DE10015697C1 (de) 2000-03-29 2000-03-29 Schallwandler für Abgaspulsationen

Publications (3)

Publication Number Publication Date
EP1138887A2 EP1138887A2 (fr) 2001-10-04
EP1138887A3 EP1138887A3 (fr) 2002-06-19
EP1138887B1 true EP1138887B1 (fr) 2003-10-01

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EP01108092A Expired - Lifetime EP1138887B1 (fr) 2000-03-29 2001-03-29 Transducteur acoustique pour les pulsations de gaz d'échappement

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EP (1) EP1138887B1 (fr)
DE (2) DE10015697C1 (fr)

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DE102012109668A1 (de) 2012-10-11 2014-04-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung zur Geräuschübertragung bei einem Kraftfahrzeug

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ES2405729R1 (es) * 2010-11-30 2013-06-19 Univ Catalunya Politecnica Sistema para modificar la sonoridad de motor endotérmico
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Also Published As

Publication number Publication date
DE50100695D1 (de) 2003-11-06
DE10015697C1 (de) 2001-12-20
EP1138887A3 (fr) 2002-06-19
EP1138887A2 (fr) 2001-10-04

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