EP1138887B1 - Acoustic transducer for exhaust gas pulsations - Google Patents
Acoustic transducer for exhaust gas pulsations Download PDFInfo
- 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
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- 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
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- 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
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- 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.
Description
Die Erfindung betrifft einen Schallwandler mit einem Abzweigungsglied, das mit einer Abgasanlage einer Brennkraftmaschine, insbesondere eines Kraftfahrzeuges, zur Abzweigung von Abgaspulsationen verbunden ist, und einem Schallwandlerkopf, über den basierend auf den Abgaspulsationen Luftschall zumindest in den Raum der Brennkraftmaschine abstrahlbar ist.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.
Der Charakter eines Kraftfahrzeuges wird durch eine komplexe Mannigfaltigkeit von Wahrnehmungen bestimmt. Manche dieser Wahrnehmungen sind visuell, andere greifbar und schließlich können auch einige hörbar sein. Dabei wird der von einer Brennkraftmaschine abgegebene Schall von einer Mischung seiner Grundfeuerungsfrequenz, höherer Harmonischen dieser Frequenz und Resonanzen aller seiner Komponenten bestimmt. Seit Anfang des letzten Jahrhunderts haben sich Generationen von Kraftfahrzeugentwicklem damit beschäftigt, den von einem Kraftfahrzeug erzeugten, hörbaren Schall durch gezielte Reduktion zu konditionieren, wobei den Entwicklern zum Schalldämpfen im wesentlichen drei nach unterschiedlichen physikalischen Prinzipien wirkende Dämpfertypen zur Verfügung stehen, nämlich Helmholtz-Resonatoren, Dissipationsdämpfer und Absorptionsdämpfer. Beispielsweise aus der DE 196 15 917 A1 ist ein Ansaugschalldämpfer bekannt, während in der nicht vorveröffentlichten DE 199 48 146 ein Abgasschalldämpfer beschrieben ist.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.
Generationen von Brennkraftmaschinen, insbesondere Motoren für Kraftfahrzeuge, mit hohen Leistungsreserven werden zunehmend mit Ladern, wie Turbuladem, mechanischen Ladern oder dergleichen, und/oder Kompressoren ausgestattet. Bei diesen Motoren werden die Mündungsgeräusche und die Körperschallabstrahlung der Ansaugmodule nicht mehr primär durch die Motorordnungen, sondern zunehmend durch subjektiv auffällige, teilweise auch als lästig empfundene Komponenten in im Vergleich zu den Grundfeuerungsfrequenzen deutlich höheren Frequenzbereichen geprägt. Besonders das Fehlen der bei Saugermotoren vorhandenen "brummigen" Motorordnungen im Mündungsgeräusch aufgrund der Tatsache, daß die Lader durch ihre Arbeitsweise die für besagte "brummige" Klänge ursächlichen Pulsationen "zerhacken", führt dazu, daß die akustisch wahrnehmbare Dynamik und Sportlichkeit von Kraftfahrzeugen im wesentlichen verloren geht. Die Motoren mit Ladern klingen zum Teil extrem rauh bzw. werden durch die charakteristischen Geräusche der Lader oder dergleichen geprägt.Generations of internal combustion engines, especially engines for motor vehicles, with high Power reserves are increasing with loaders such as turbulators, mechanical loaders or the like, and / or compressors. With these engines, the muzzle noises and the structure-borne noise radiation of the intake modules is no longer primarily caused by the engine orders, but increasingly by subjectively conspicuous, sometimes also as annoying perceived components in significantly higher compared to the basic firing frequencies Frequency ranges. Especially the lack of those available in naturally aspirated engines "grumbling" engine orders in the muzzle noise due to the fact that the loader "chop" the pulsations that are the cause of the "grumpy" sounds, leads to the acoustically perceptible dynamics and sportiness of motor vehicles is essentially lost. The engines with loaders sometimes sound extreme rough or are characterized by the characteristic noise of the loader or the like.
Im Stand der Technik sind zahlreiche Vorrichtungen bekannt, die zumindest dem Fahrer bzw. den Insassen im Fahrzeug eine zusätzliche akustische Rückmeldung des Motors liefern.Numerous devices are known in the prior art which at least the driver or provide the occupants in the vehicle with additional acoustic feedback from the engine.
Aus der JP 02248610 A ist eine Vorrichtung zum Zuführen von Abgasgeräuschen eines Kraftfahrzeuges zu dem Fahrgastinnenraum desselben bekannt. Dabei kommt ein Resonator in Wirkverbindung mit der Abgasanlage des Kraftfahrzeuges unter Zwischenschaltung einer Membrane zum Einsatz, der die gleiche Resonanzfrequenz wie die Membrane aufweist, um Filtereffekte der Membrane zu vermeiden.JP 02248610 A describes a device for supplying exhaust gas noise Motor vehicle to the passenger interior of the same is known. Here comes 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.
Die DE 197 46 523 A1 offenbart ein Verfahren zur Klangerzeugung in Kraftfahrzeugen. Bei diesem Verfahren wird die Drehzahl bzw. der Lastzustand eines Motors über geeignete Sensoren bestimmt. Zusätzlich werden über im Fahrgastinnenraum angebrachte Mikrofone die dort vorherrschenden Schallsignale zur Bestimmung von Übertragungsfunktionen aufgenommen, Um den Klangeindruck im Fahrgastinnenraum zu verändern, können in Abhängigkeit von den Übertragungsfunktionen bestimmte vom Motor abgestrahlte akustische Oberwellen verschiedener Ordnung oder Teile davon mittels Lautsprechern in den Fahrgastinnenraum abgestrahlt werden. Dazu werden die Signale der Sensoren und Mikrofone mittels eines AD-Wandlers umgewandelt, mittels eine Mikroprozessors analysiert, und das gewünschte Ausgangssignal erzeugt, welches über einen DA-Wandler an die im Fahrgastinnenraum befindlichen Lautsprecher geführt wird. 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. In addition, 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. For this purpose, 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.
Aus der WO 00/04532 ist ein Verfahren und eine Vorrichtung zur Erzeugung von Geräuschen im Innenraum eines Kraftfahrzeugs in Abhängigkeit vom Betriebszustand eines Verbrennungsmotors bekannt. Diese Vorrichtung erfaßt zunächst Druckschwankungen im Ansaugbereich des Motors mittels eines Drucksensors. Das Ausgangssignal des Drucksensors, welches repräsentativ für die Drehzahl und die Last, unter dem der Motor läuft, ist, wird in einer elektronischen Filtereinrichtung aufbereitet, in einem Verstärker verstärkt und über Lautsprecher im Innenraum des Kraftfahrzeugs wiedergegeben. Es wird auch vorgeschlagen, daß der Verstärker und der Filter über eine Modulationseinrichtung gesteuert werden können. Diese Modulationseinrichtung wiederum ist mit Sensoren zur Feststellung einer Gaspedalstellung, einer Fahrzeuggeschwindigkeit bzw. einer Position eines Schalthebels verbunden. Durch dieses Modulationsglied werden Frequenzanteile des über die Lautsprecher wiedergegebenen Signals angehoben bzw. abgesenkt oder eine Frequenzvervielfachung von diesem, im Bezug auf das Eingangssignal, herbeigeführt.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. It is also suggested that 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.
Im Gegensatz zu diesen Vorrichtungen, welche akustische Signale zunächst in elektrische Signale umwandeln und diese weiter verarbeiten, um sie über Lautsprecher dem Fahrgastinnenraum zuzuführen, sind aus dem Stand der Technik auch rein mechanoakustisch arbeitende Vorrichtungen zur Erzeugung einer akustischen Rückmeldung bekannt.In contrast to these devices, which first acoustic signals in electrical Convert signals and process them further to be transmitted to the passenger compartment via loudspeakers from the prior art are also purely mechanoacoustic Devices for generating an acoustic feedback known.
Die DE 44 35 296 A1 offenbart eine Vorrichtung, bei der aus dem Ansaugtrakt einer Brennkraftmaschine eines Kraftfahrzeuges ein Rohrstück abzweigt. Dieses Rohrstück ist mit einer Membrane zur Erzeugung eines gewünschten Geräuschspektrums, insbesondere beim Beschleunigen des Kraftfahrzeuges, versehen. Der Membrane schließt sich auf der Seite, die dem Abzweigrohr abgewandt ist, ein Leitungsrohr an, welches mit zumindest einem akustischen Resonator versehen ist. Dieses Leitungsrohr endet offen im Motorraum. Über die Spannung der Membrane wird die Resonanzfrequenz dieser, und damit die Frequenz der abgegebenen Schallwellen, der jeweiligen Brennkraftmaschine angepaßt.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.
Um dem Fahrer auch bei geräuscharmen Fahrzeugen eine akustische Information über den Betriebszustand des Motors zu geben, wird in der DE 197 04 376 A1 eine Luftfilteranordnung offenbart, welche eine akustische Verbindung zum Innenraum des Kraftfahrzeuges aufweist. Diese Verbindung wird durch eine Leitung, welche rohr- bzw. schlauchartig ausgebildet sein kann und durch eine Membrane in zwei Teile aufgeteilt wird, bereitgestellt. Durch Anpassung der Flexibilität der Membrane und der geometrischen Ausmaße des einen Teilstücks der Leitung, welches als Resonator wirkt, kann das im Inneren des Fahrerraums erzeugte Geräuschspektrum dem Motor angepaßt werden.To provide the driver with acoustic information about the vehicle even in low-noise vehicles To give the operating state of the engine is an air filter arrangement in 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.
Aus der DE 42 33 252 ist eine gattungsgemäße akustische Anzeigevorrichtung zur Erzeugung einer akustischen Rückmeldung für den Fahrzeuglenker bekannt. Diese Anzeigevorrichtung umfaßt einen mechanoakustischen Wandler, welcher in Form einer Membrane an einem freien Ende eines Rohrers, welches sich im Fahrgastinnenraum befindet, ausgeführt sein kann. Das andere Ende des Rohres ist mit der Hauptleitung des Ansaug- oder Auspuffsystems eines Motors verbunden. In diesem Rohr befindet sich ein Drosselorgan, welches motorisch angetrieben und über Fahrpedalbewegungen gesteuert wird. Mit Hilfe dieses Drosselorgans kann die Amplitude des dem Fahrgastinnenraum zugeführtem Rückmeldungssignals während des Betrieb gesteuert werden.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. In 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.
Nachteilig bei den aus dem Stand der Technik bekannten Vorrichtungen ist, daß die Vorrichtungen, bei denen zunächst ein akustisches in ein elektrisches Signal umgewandelt wird, anschließend verarbeitet und dann über Lautsprecher dem Fahrgastinnenraum zugeführt wird, zwar eine Steuerung der Frequenzcharakteristik des Ausgangssignals auch während des Betriebes ermöglichen, aber diese Vorrichtungen technisch sehr aufwendig sind. Somit sind diese Vorrichtungen im Einbau zeit- und kostenintensiv und weisen eine erhöhte Störanfälligkeit auf. Dagegen weisen die bekannten Vorrichtungen, die rein mechanoakustisch ein zusätzliches Schallsignal im Innenraum des Kraftfahrzeugs erzeugen, den Nachteil auf, daß eine Steuerung des Ausgangssignals während des Betriebes nur in der Art möglich ist, daß die Amplitude des Ausgangssignals verändert wird, während die Frequenzcharakteristik während des Betriebes unverändert bleibt.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.
Aus der FR 642008 A ist ein Diebstahlwarnsystem für ein Kraftfahrzeug bekannt, bei dem im Falle eines unautorisierten Startens eines Kraftfahrzeuges Abgasgeräusche verstärkt als Warnsignal aus dem Kraftfahrzeug abgestrahlt werden. Dabei kommt ein Resonanzkörper in Wirkverbindung mit einem Abgassystem zum Einsatz. From FR 642008 A a theft warning system for a motor vehicle is known, 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.
Aufgabe der vorliegenden Erfindung ist es daher, die gattungsgemäße Vorrichtung derart weiterzuentwickeln, daß die Nachteile des Stands der Technik überwunden werden, insbesondere eine konstruktiv einfach gestaltete Vorrichtung zur dynamischen und sportlichen Gestaltung der Akustik einer Brennkraftmaschine bereitgestellt wird, die eine Steuerung der Frequenzcharakteristik auch während des Fahrbetriebes in Abhängigkeit vom jeweiligen Betriebszustand der Brennkraftmaschine ermöglicht.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.
Diese Aufgabe wird eriindungsgemäß gelöst durch ein Modulationsglied, über das die Position des Schallwandlerkopfes variierbar ist und das zwischen dem Abzweigungsglied und dem Schallwandlerkopf angeordnet ist.According to the invention, 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.
Dabei ist erfindungsgemäß vorgesehen, daß das Modulationsglied von dem Fahrer des Kraftfahrzeuges einstellbar und/oder automatisch steuerbar ist.It is provided according to the invention that the modulation element by the driver of the motor vehicle is adjustable and / or automatically controllable.
Erfindungsgemäß ist auch vorgesehen, daß der Schallwandlerkopf als Resonanzkörper ausgebildet ist, vorzugsweise umfassend ein Trägergerüst sowie eine darin eingespannte Membrane.According to the invention, it is also provided that the transducer head is designed as a resonance body is, preferably comprising a support frame and a membrane clamped therein.
Ferner wird mit der Erfindung vorgeschlagen, daß der Schallwandlerkopf zumindest teilweise in den Raum der Brennkraftmaschine und/oder in den Fahrzeuginnenraum plazierbar ist.It is also proposed with the invention that the transducer head at least partially can be placed in the space of the internal combustion engine and / or in the vehicle interior.
Die Frequenzcharakteristik und/oder Amplitude des abgestrahlten Luftschalls kann bzw. können gemäß der Erfindung durch die Ankopplungsstelle des Abzweigungsglieds an die Abgasanlage, wie an einen bestimmten Abgaskrümmerbereich, eine Abgasleitung oder dergleichen, die Plazierung des Schallwandlerkopfes die Einstellung des Modulationsgliedes, die Geometrie und/oder Dimensionierung des Schallwandlers, wie dessen Rohre, des Resonanzkörpers des Schallwandlerkopfes oder dergleichen, und/oder die elastischen Eigenschaften der Membrane des Resonanzkörpers bestimmbar sein.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.
Erfindungsgemäß kann ferner ein Ventil, welches vorzugsweise zwischen dem Modulationsglied und dem Schallwandlerkopf angeordnet ist, zum insbesondere stufenweisen, Zu- bzw. Abschalten des Schallwandlers, vorzugsweise betätigbar von dem Fahrer des Kraftfahrzeuges und/oder automatisch gesteuert in Abhängigkeit von der Drehzahl der Brennkraftmaschine und/oder einem Geräuschpegel, außerhalb und/oder innerhalb des Kraftfahrzeuges, vorgesehen sein.According to the invention, 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.
Bei einer Weiterentwicklung der Erfindung ist das Ventil dabei an eine Audio-Anlage, wie eine Stereoanlage, eine Freisprechanlage oder dergleichen, des Kraftfahrzeuges gekoppelt.In a further development of the invention, the valve is connected to an audio system such as a stereo, a hands-free system or the like, coupled to the motor vehicle.
Ferner werden erfindungsgemäß Ausführungsformen mit zumindest einem Filter und/oder einem Verstärker zur Einstellung, vorzugsweise Regelung, der Frequenzcharakteristik und/oder Amplitude des abgestrahlten Luftschalls vorgeschlagen.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.
Dabei kann vorgesehen sein, daß das Filter und/oder der Verstärker höhere Harmonische der Grundfeuerungsfrequenz der Brennkraftmaschine hervorhebt bzw. hervorheben.It can be provided that the filter and / or the amplifier higher harmonics Highlight or highlight the basic firing frequency of the internal combustion engine.
Auch kann ein Dämpfungsglied zur Aufnahme ausgewählter mechanischer Schwingungen vorgesehen sein.An attenuator can also be used to absorb selected mechanical vibrations be provided.
Erfindungsgemäß kann auch vorgesehen sein, daß das Modulationsglied das Filter, den Verstärker und/oder das Dämpfungsglied umfaßt.According to the invention it can also be provided that the modulation element is the filter, the amplifier and / or includes the attenuator.
Schließlich wird mit der Erfindung wird ferner vorgeschlagen, daß der Schallwandlerkopf, das Ventil und/oder das Modulationsglied jeweils zumindest eine elektrische und/oder elektronische Komponente, vorzugsweise über einen Mikrokontroller steuerbar, umfaßt bzw. umfassen.Finally, 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.
Der Erfindung liegt somit die überraschende Erkenntnis zugrunde, daß durch die Verwendung eines Modulationsgliedes zwischen dem Abzweigungsglied und dem Schallwandlerkopf der zusätzlich wahlweise im Fahrgastinnenraum ertönende Luftschall in seiner Frequenzcharakteristik während des Betriebes dem jeweiligen Betriebszustand auf einfache Weise gesteuert werden kann. 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.
Die Frequenzcharakteristik kann darüber hinaus durch die Ankopplung des Schallwandlers an unterschiedlichen Ankopplungsstellen der Abgasanlage und Verwendung weiterer Filter und Verstärker angepaßt werden. Aber auch das schallabstrahlende Bauteil in Form eines resonatorähnlichen Schallwandlerkopfes mit integrierter Membrane kann in verschiedenster Bauform sowie aus unterschiedlichsten Materialien zur weiteren Abstimmung der Lautstärke sowie des Klangs eines Kraftfahrzeuges hergestellt sein, wobei die Größe und Positionierung des Schallwandlerkopfes im Motorraum und/oder im Fahrzeuginnenraum ebenfalls zur Abstimmung von Relevanz ist. Selbstverständlich läßt sich auch über die Länge sowie den Durchmesser der weiteren Bestandteile des Schallwandlers, insbesondere der Rohre desselben, die Frequenzcharakteristik und/oder Amplitude des abgestrahlten Luftstrahls weiter variieren.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. But also 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. Of course, you can also about the length and the Diameter of the other components of the sound transducer, in particular the tubes of the same, the frequency characteristic and / or amplitude of the emitted air jet continue to vary.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der einige Ausführungsbeispiele der Erfindung anhand von schematischen Zeichnungen beispielhaft im Einzelnen erläutert sind. Dabei zeigt:
Figur 1- die Ankopplung eines erfindungsgemäßen Schallwandlers an eine Abgasanlage;
- Figuren 2a bis 2c
- unterschiedliche Schallwandlerköpfe, verwendbar mit dem in
Figur 1 gezeigten Schallwandler.
- Figure 1
- the coupling of a sound transducer according to the invention to an exhaust system;
- Figures 2a to 2c
- different transducer heads, usable with the transducer shown in Figure 1.
Herkömmlicherweise ist an einen Motor 1 eines Kraftfahrzeuges eine Abgasanlage 2 angebracht,
die ihrerseits Abgaskrümmerzweige 3, 3', 3", 3"', deren Anzahl von der Anzahl der
Zylinder des Motors 1 abhängt, sowie eine Abgasleitung 4 unter anderem umfaßt, wie in Figur
1 dargestellt. An solch eine Abgasanlage 2 ist ein erfindungsgemäßer Schallwandler 10
ankoppelbar, nämlich über ein Abzweigungsrohr, wie das an die Abgasleitung 4 angeschlossene
und somit mit den vier Abgaskrümmerzweigen 3, 3', 3" und 3"' verbundene Abzweigungsrohr
11, das mit zwei Abgaskrümmerzweigen 3, 3' verbundene Abzweigungsrohr 11'
oder das mit einem Abgaskrümmerzweig 3 verbundene Abzweigungsrohr 11", wobei das Abzweigungsrohr
11, 11' oder 11" über ein Modulationsglied 12, ein Ventil 13 und ein Führungsrohr
14 mit einem im Motorbereich angeordneten Schallwandlerkopf 15 wiederum verbunden
ist.An
Die Ankopplungsstelle des Abzweigungsrohrs 11, 11' oder 11" des Schallwandlers 10 an die
Abgasanlage 2 bestimmt die Grundfrequenz der Abgaspulsationen des Motors 1, die in den
Schallwandler 10 eingekoppelt wird. Über das Modulationsglied 12 lassen sich mechanische
Schwingungen zum Teil aufnehmen, die Position des Schallwandlerkopfes 15 im Motorraum
justieren sowie Frequenzen in zumindest einem ersten Frequenzbereich herausfiltern und in
zumindest einem zweiten Frequenzbereich verstärken. Das Ventil 13 gestattet es, den Schallwandler
10, je nach Wunsch des Fahrers und auch automatisch in Abhängigkeit von, beispielsweise,
dem Zustand einer Stereoanlage, einer Freisprechanlage oder dergleichen, zu-
bzw. abzuschalten. Über die Länge sowie den Durchmesser des Abzweigungsrohrs 11, 11'
oder 11" sowie des Führungsrohrs 14 läßt sich ebenfalls die Frequenzcharakteristik und/oder
Amplitude der im Schallwandler 10 transferierten Schwingungen modulieren. Schließlich
gestattet die Ausgestaltung des Schallwandlerkopfes 15 als Resonanzkörper eine weitere Modulation
der Schwingungen sowie eine Abstrahlung des eingestellten Luftschalls.The coupling point of the
In den Figuren 2a, 2b und 2c sind alternative Ausgestaltungen des Schallwandlerkopfes 15 a,
15b und 15c dargestellt. Demnach umfaßt jeder Schallwandlerkopf 15a, 15b und 15c ein Trägergerüst
16a, 16b und 16c, in das eine Membrane 17a, 17b bzw. 17c eingespannt ist. Durch
die Geometrie des Trägergerüsts 15a, 15b bzw. 15c sowie der Membrane 17a, 17b bzw. 17c,
das Material der Membrane 17a, 17b bzw. 17c, das ein Elastomer, einen Kunststoff oder auch
Blech umfassen kann, und die Art der Einspannung der Membrane 17a, 17b bzw. 17c in dem
Trägergerüst 16a, 16b bzw. 16c läßt sich abschließend der abzustrahlende Luftschall in seinem
Klang sowie seiner Lautstärke einstellen.FIGS. 2a, 2b and 2c show alternative configurations of the
Selbstverständlich kann der erfindungsgemäße Schallwandler auch elektrische sowie elektronische Komponenten zur weiteren Abstimmung der Frequenzcharakteristik und/oder des Pegels des Schalls enthalten.Of course, 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.
Durch den erfindungsgemäßen Schallwandler wird somit erstmals die Möglichkeit gegeben, nicht nur bestimmte Frequenzcharakteristiken aus der Geräuschskulisse eines Fahrzeuges herauszudämpfen, sondern gezielt erwünschte Klänge in einen bestimmten Bereich eines Fahrzeuges, beispielsweise unter die Motorhaube, abzustrahlen. Dabei ist nicht nur eine einfache Transferierung von Schwingungen möglich, sondern auch gleichzeitig eine Bearbeitung derselben zur Einstellung eines individuell erwünschten "Sounds". Dieser "Sound" ist insbesondere motorordnungsabhängig, einschließlich der Möglichkeit der Suggerierung einer höheren Zylinderzahl, indem, beispielsweise, ein Vierzylinder-Motor wie ein Achtzylinder-Motor aufgrund einer Hervorhebung von höheren Harmonischen klingt.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.
Die in der vorstehenden Beschreibung, in den Zeichnungen sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in jeder beliebigen Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.Those disclosed in the foregoing description, in the drawings, and in the claims Features of the invention can be used individually or in any combination essential for the implementation of the invention in its various embodiments his.
Claims (12)
- An acoustic transducer (10) with
a branching element (11, 11', 11") connected to an exhaust gas system (2) of an internal combustion engine (1), particularly of a motor vehicle, for branching off exhaust gas pulsations, and
an acoustic transducer head (15, 15a, 15b, 15c), by way of which air-borne sound can be radiated, based on the exhaust gas pulsations, at least into the area of the internal combustion engine (1),
characterised by
a modulation element (12) by means of which the position of the acoustic transducer head (15, 15a, 15b, 15c) is variable and which is disposed between the branching element (11, 11', 11") and the acoustic transducer head (15, 15a, 15b, 15c). - An acoustic transducer according to claim 1, characterised in that the modulation element (12) is adjustable by the motor vehicle driver and/or automatically controllable.
- An acoustic transducer according to claim 1 or 2, characterised in that the acoustic transducer head (15, 15a, 15b, 15c) is constructed as a resonance element, preferably comprising a carrier framework (16a, 16b, 16c) and a membrane (17a, 17b, 17c) clamped therein.
- An acoustic transducer according to any one of the preceding claims, characterised in that the acoustic transducer head (15, 15a, 15b, 15c) is adapted to be placed at least partially into the area of the internal combustion engine (1) and/or into the vehicle interior.
- An acoustic transducer according to any one of the preceding claims, characterised in that the frequency characteristic and/or the amplitude of the radiated air-borne sound can be determined by the place where the branching element (11, 11', 11") is coupled to the gas exhaust system (2), such as to a specific exhaust gas bend zone (3, 3', 3", 3'''), an exhaust gas pipe (4) or the like,
the placing of the acoustic transducer head (15, 15a, 15b, 15c), the adjustment of the modulation element (12),
the geometry and/or dimensioning of the acoustic transducer (10), such as the pipes (11, 11', 11", 14) thereof, of the resonance element of the acoustic transducer head (15, 15a, 15b, 15c) or the like, and/or
the elastic properties of the membrane (17a, 17b, 17c) of the resonance element. - An acoustic transducer according to any one of the preceding claims, characterised by a valve (13), preferably between the modulation element (12) and the acoustic transducer head (15, 15a, 15b, 15c), particularly for the stage-wise connection and disconnection of the acoustic transducer (10), preferably actuatable by the motor vehicle driver and/or automatically controlled in dependence on the speed of the internal combustion engine (1) and/or a noise level, outside and/or inside the motor vehicle.
- An acoustic transducer according to claim 6, characterised in that the valve (13) is coupled to an audio system, such as a stereo system, a hands-free system, or the like, of the motor vehicle.
- An acoustic transducer according to any one of the preceding claims, characterised by at least one filter and/or amplifier for adjustment, preferably. regulation, of the frequency characteristic and/or amplitude of the radiated air-borne sound.
- An acoustic transducer according to claim 8, characterised in that the filter and/or the amplifier emphasises/emphasise higher harmonics of the basic firing frequency of the internal combustion engine.
- An acoustic transducer according to any one of the preceding claims, characterised by an attenuation element to absorb selected mechanical vibrations.
- An acoustic transducer according to any one of claims 8 to 10, characterised in that the modulation element (12) comprises the filter, the amplifier and/or the attenuation element.
- An acoustic transducer according to any one of the preceding claims, characterised in that the acoustic transducer head (15, 15a, 15b, 15c), the valve (13) and/or the modulation element (12) respectively comprise at least one electric and/or electronic component, preferably controllable via a microcontroller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10015697 | 2000-03-29 | ||
| DE10015697A DE10015697C1 (en) | 2000-03-29 | 2000-03-29 | Sound converter for exhaust gas pulsations |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1138887A2 EP1138887A2 (en) | 2001-10-04 |
| EP1138887A3 EP1138887A3 (en) | 2002-06-19 |
| EP1138887B1 true EP1138887B1 (en) | 2003-10-01 |
Family
ID=7636887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01108092A Expired - Lifetime EP1138887B1 (en) | 2000-03-29 | 2001-03-29 | Acoustic transducer for exhaust gas pulsations |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1138887B1 (en) |
| DE (2) | DE10015697C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012109668A1 (en) | 2012-10-11 | 2014-04-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device for sound transmission in vehicle e.g. motor car, has transfer line that is provided with gastight membrane as sound transmission element to direct mouth region of exhaust system for connecting with inner space of motor car |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10114397A1 (en) * | 2001-03-23 | 2002-09-26 | Mahle Filtersysteme Gmbh | Sound transmission device for motor vehicle has several resonator chambers working in parallel, of which at least two are different from each other in terms of their frequency tuning |
| DE10221447A1 (en) * | 2002-05-15 | 2003-11-27 | Mahle Filtersysteme Gmbh | Sound transducer for a motor vehicle |
| DE10223875A1 (en) * | 2002-05-29 | 2003-12-11 | Daimler Chrysler Ag | Device for noise shaping in a motor vehicle |
| DE10259099A1 (en) * | 2002-12-18 | 2004-07-01 | Mahle Filtersysteme Gmbh | Sound transducer for a motor vehicle |
| DE102005006914B4 (en) | 2005-02-16 | 2008-05-29 | Woco Industrietechnik Gmbh | Device for sound coupling between an intake tract and / or engine compartment and a vehicle interior of a motor vehicle |
| JP2007231931A (en) | 2006-01-31 | 2007-09-13 | Nissan Motor Co Ltd | Intake sound transmission device and intake sound transmission method |
| US7845466B2 (en) | 2007-08-28 | 2010-12-07 | Visteon Global Technologies, Inc. | Sound generator with structurally and acoustically coupled sound radiation panel and method for manufacturing the same |
| ES2405729R1 (en) * | 2010-11-30 | 2013-06-19 | Univ Catalunya Politecnica | System to modify the loudness of endothermic motor |
| CN102840023A (en) * | 2011-06-21 | 2012-12-26 | 祁成 | Automobile exhaust pipe |
| DE102011056615A1 (en) * | 2011-12-19 | 2013-06-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Sound transmission system for motor vehicle, has intake sound transmission unit coupled with air intake pipe leading to internal combustion engine by tubular connecting element and with vehicle interior by another tubular connecting element |
| US9682652B2 (en) * | 2015-10-06 | 2017-06-20 | Honda Motor Co., Ltd. | Vehicle acoustic apparatus, and methods of use and manufacture thereof |
| GB2556046B (en) * | 2016-11-14 | 2019-12-18 | Jaguar Land Rover Ltd | Vehicle exhaust system with sound transmission device |
| IT201700044384A1 (en) * | 2017-04-21 | 2018-10-21 | Ferrari Spa | ROAD VEHICLE WITH AN INTERNAL COMBUSTION ENGINE AND PROVIDED WITH A DISCHARGE NOISE TRANSMISSION DEVICE |
| DE102017222144A1 (en) | 2017-12-07 | 2019-06-13 | Bayerische Motoren Werke Aktiengesellschaft | Device and method for generating a noise in a motor vehicle, and motor vehicle |
| DE102020007483A1 (en) | 2020-12-08 | 2022-06-09 | Mercedes-Benz Group AG | Exhaust system for an internal combustion engine of a motor vehicle |
| GB202111213D0 (en) * | 2021-08-03 | 2021-09-15 | Mclaren Automotive Ltd | Improved sound bypass |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR642008A (en) * | 1927-10-06 | 1928-08-17 | Motor vehicle warning device | |
| JPH02248610A (en) * | 1989-03-22 | 1990-10-04 | Mazda Motor Corp | Engine exhaust sound introduction device |
| DE4233252C1 (en) * | 1992-10-02 | 1993-12-16 | Bayerische Motoren Werke Ag | Acoustic signalling display indicating engine running noise in car - uses signal representing depression of accelerator pedal to control throttle in pneumatic line leading to oscillating membrane |
| DE4435296C2 (en) * | 1994-10-01 | 2002-04-25 | Bayerische Motoren Werke Ag | Motor vehicle with an internal combustion engine |
| DE19615917A1 (en) * | 1996-04-22 | 1997-10-30 | Wolf Woco & Co Franz J | Intake silencer and motor vehicle |
| DE19746523B4 (en) * | 1996-11-02 | 2006-06-08 | Volkswagen Ag | Method for generating sound in motor vehicles and a circuit arrangement for carrying out the method |
| DE19704376A1 (en) * | 1997-02-06 | 1998-08-13 | Knecht Filterwerke Gmbh | Air filter for IC engine |
| DE19831576A1 (en) * | 1998-07-14 | 2000-01-20 | Tuev Automotive Gmbh Unternehm | Procedure for generating from operation of IC engine, corresponding noises in cabin of car has pressure variations detected in fresh air flow passed to engine and converted into signals, made audible via loudspeaker(s) in cabin |
| DE19948146A1 (en) * | 1999-09-28 | 2001-03-29 | Wolf Woco & Co Franz J | Exhaust silencer |
-
2000
- 2000-03-29 DE DE10015697A patent/DE10015697C1/en not_active Expired - Fee Related
-
2001
- 2001-03-29 EP EP01108092A patent/EP1138887B1/en not_active Expired - Lifetime
- 2001-03-29 DE DE50100695T patent/DE50100695D1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012109668A1 (en) | 2012-10-11 | 2014-04-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device for sound transmission in vehicle e.g. motor car, has transfer line that is provided with gastight membrane as sound transmission element to direct mouth region of exhaust system for connecting with inner space of motor car |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1138887A2 (en) | 2001-10-04 |
| DE10015697C1 (en) | 2001-12-20 |
| EP1138887A3 (en) | 2002-06-19 |
| DE50100695D1 (en) | 2003-11-06 |
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