EP1152132B1 - Ducting system with electromechanical converter producing a correction noise - Google Patents

Ducting system with electromechanical converter producing a correction noise Download PDF

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Publication number
EP1152132B1
EP1152132B1 EP01106988A EP01106988A EP1152132B1 EP 1152132 B1 EP1152132 B1 EP 1152132B1 EP 01106988 A EP01106988 A EP 01106988A EP 01106988 A EP01106988 A EP 01106988A EP 1152132 B1 EP1152132 B1 EP 1152132B1
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EP
European Patent Office
Prior art keywords
noise
duct
intake
duct system
driving means
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
EP01106988A
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German (de)
French (fr)
Other versions
EP1152132A1 (en
Inventor
Rolf Dr. Schirmacher
Franc Pricken
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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Publication of EP1152132A1 publication Critical patent/EP1152132A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1244—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound
    • F02M35/125—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound by using active elements, e.g. speakers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/14—Combined air cleaners and silencers
    • 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/112—Ducts
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/128—Vehicles
    • G10K2210/1282—Automobiles
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3031—Hardware, e.g. architecture
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3214—Architectures, e.g. special constructional features or arrangements of features

Definitions

  • the invention relates to a conduit system for the passage of a gas, in particular a Intake tract of an internal combustion engine, the an electromagnetic transducer for Generating a noise which influences the gas flow in the line section, according to the preamble of claim 1.
  • Electromechanical transducers of the type described above are usually as speakers executed and are, for example, in the intake of internal combustion engines used to generate a correction noise, which the intake noise is superimposed.
  • the level of the intake noise can be reduced or changed this being understood as correcting the intake noise.
  • the US 5 119 902 to call in the intake system or in the exhaust system of an internal combustion engine can be used, the US 5 119 902 to call.
  • a disadvantage of the use of the speakers described is their sensitivity against dirt. Therefore, the drive of this electromagnetic converter must be encapsulated which results in additional expense.
  • the actuator must be in shape the speaker diaphragm be acoustically shielded from the engine compartment, as only one acoustic influence within the system limits z.
  • the object of the invention is therefore to provide a conduit system with electromechanical converter to create a sound that is inexpensive to manufacture and requires little space. This object is achieved by the features of claims 1, 2 and 7 solved.
  • the invention is characterized in that the drive of the electromechanical Transducer is mounted in the line system such that this in the line system is subjected to funded gas flow. Due to the pumped gas flow is a cooling of the drive, which prevents excessive heating.
  • the electromechanical Converter is usually a speaker, wherein the actuator is the speaker diaphragm is and the drive is effected by an electric coil, in which a bobbin introduced is.
  • the cooling of the components mentioned allows the choice of a smaller drive for the speaker, because of overheating and consequent failure of the converter can be counteracted by a continuous load. Thereby can be saved advantageously not only installation space and weight. Another positive effect is the ability to use less expensive speakers.
  • the drive accommodated in the line system is that this with a clean side of the line section formed by the filter communicated.
  • the drive can be protected in this way against contamination when installed in the ducting system in such a way that it is directly connected to the subsidized gas communicates. This is especially the case when the drive is direct exposed to the gas stream.
  • the advantage with the pure-side arrangement is the omission an encapsulation that protects the sensitive drive from contamination. Consequently can also be saved by this measure space, component part weight and cost become.
  • both sides of the membrane are used to influence the intake noise, may be an acoustic vote according to another embodiment of the inventive concept done by additional channels and / or volumes. It is targeted the Superposition of the generated by both sides of the membrane air vibrations used.
  • a strong correction by the speaker or other transducers, by superimposing a gain of the emitted Vibrations, in other areas a weakening can be achieved.
  • the means for Control and adaptation realized for example by an electronic control be equipped with a memory for typical driving conditions. These driving conditions can be stored together with other maps in the controller and thus form the parameters for the desired sound to be achieved. Through the store can continue to change the noise characteristics of the engine or the intake tract to be compensated by pollution or aging is effected.
  • the control thus forms a self-learning system, which is advantageous the function over the operating time of the internal combustion engine maintained unrestricted can be.
  • FIG. 1 shows an internal combustion engine 10 is shown schematically. This has an intake tract 11 with a throttle valve 12 and an exhaust system 13. The direction of the intake air and the exhaust gas is indicated by arrows.
  • an electromechanical Transducer 14 which is designed here as a loudspeaker arranged.
  • a sensor 16 designed here as a microphone attached.
  • the one received by the sensor 16 lstge syndromeschsignal I and a removed from the internal combustion engine 10 speed signal D is supplied.
  • the Speed signal can z. B. be measured by a speed sensor 18. Also is the Measurement of the throttle angle by means of a position sensor 19 possible. This generates another parameter P, which are also processed by the controller can.
  • the controller 17 generates a control signal A ges , which is converted by the electromechanical transducer 14 into a correction sound 20, 20 '. This is superimposed on the intake noise 21 of the internal combustion engine, which propagates through the intake tract 11. This results in an actual noise 22, which z. B. can be measured by the sensor 16 at the intake manifold 15. This results in the Istge syndromeschsignal I.
  • the electromechanical transducer 14 consists of the actuator 26, in the embodiment designed as a speaker diaphragm, and a drive 27, which by a coil with a core is formed.
  • the drive 27 projects into the line section 25 and becomes so acted upon for cooling by the intake air.
  • the diaphragm side connected to the drive 27 of the actuator 26 forms part of the wall of the line section 25, whereby the membrane vibrations as correction sound 20 transmitted directly to the intake air becomes.
  • the membrane side facing away from the drive is connected to an additional volume 28, which communicates via an additional line 29 with the line section 25.
  • an additional line 29 and the size of the additional volume 28 may be an acoustic Voting done so that a targeted overlay of the through the additional line 29, the line section 25 supplied correction sound 20 'and the Correction noise 20 is achieved.
  • the controller 17 is constructed as a digital computer.
  • the control signal A ges must therefore be converted by a digital-to-analog converter 24 into an analog signal, by means of which the electromechanical converter 14 can be controlled.
  • This embodiment represents the most favorable variant in terms of the component cost, the manufacturing costs and the reliability of the device. Equally conceivable, however, is the structure of the controller 17 as an analog computer.
  • the signals are processed analogously and may need to be converted into analog signals beforehand (depending on whether the sensors supply digital or analogue signals).
  • the control signal A ges which provides an analog controller 17, then no longer needs to be converted. Possibly. is still a gain of the control signal A ges necessary. This is optionally done by an amplifier 23.
  • the controller is associated with a memory 31. This is used to store operation-dependent Desired sounds that a map to generate the correction noise 20, 20 'result. Furthermore, characteristic values can be stored in the memory be used to a self-learning function of the controller. This will be one Faster response of the controller with changes in operating conditions and a Adapting the operation of the device to age-related changes in the Internal combustion engine 10 and the intake tract 11 possible.
  • a filter 32 is shown, on the clean side 33 in the filter housing 34 of the electromechanical transducer 14 mounted in the air stream and protected from contamination is.
  • the filter housing is designed as part of the intake tract 11.
  • the air is flowing according to the indicated arrows from the intake manifold 15 through the filter 32 to a Suction tube, not shown.
  • the electromechanical transducer is in the partition wall housed between intake manifold and filter housing, so that both sides of the Membrane emit the generated noise in the intake tract.
  • Radiation directly into the intake manifold instead of an overlay with the muzzle noise is directly possible.
  • the noise in the pure-side housing volume emitted by the air filter. In order to get to the intake manifold, must These air vibrations first pass through the air filter, wherein the damping effect the filter medium can be used specifically.
  • FIG. 3 shows a suction tube 35 with resonance charging.
  • Suction channels 36 go of two separated by an intermediate wall 37 resonant chambers 38 from.
  • a resonance flap 39 is arranged, which depends on the operating state the internal combustion engine, not shown, can be opened and closed.
  • Farther is housed in the intermediate wall 37 of the electromechanical transducer 14, wherein each one side of the actuator 26 acts on a respective resonance chamber 38.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

The system has a pipe section (25) with an induction opening and an electromagnetic transducer (14) producing noise to influence the gas flow in the pipe section, especially to correct engine induction noise. The transducer has an actuator for noise generation, especially a membrane, with a drive (27), especially an electric coil (32). The drive is mounted in the pipe system so as to be exposed to the gas flow transported in the pipe system. Independent claims are also included for the following: the use of a pipe system in the induction system of an internal combustion engine.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Leitungssystem zur Durchleitung eines Gases, insbesondere einen Ansaugtrakt einer Brennkraftmaschine, der einen elektromagnetischen Wandler zur Erzeugung eines den Gasstrom im Leitungsabschnitt beeinflussenden Geräusches enthält, nach der Gattung des Patentanspruches 1.The invention relates to a conduit system for the passage of a gas, in particular a Intake tract of an internal combustion engine, the an electromagnetic transducer for Generating a noise which influences the gas flow in the line section, according to the preamble of claim 1.

Elektromechanische Wandler der eingangs beschriebenen Art sind gewöhnlich als Lautsprecher ausgeführt und werden zum Beispiel im Ansaugbereich von Brennkraftmaschinen zur Erzeugung eines Korrekturgeräusches genutzt, welches dem Ansauggeräusch überlagert ist. Damit kann der Pegel des Ansauggeräusches verringert oder auch verändert werden, wobei dies als Korrektur des Ansauggeräusches aufgefasst wird. Als Beispiel für eine solche Vorrichtung, die im Ansaugtrakt oder in der Abgasanlage einer Brennkraftmaschine verwendet werden kann, ist die US 5 119 902 zu nennen.Electromechanical transducers of the type described above are usually as speakers executed and are, for example, in the intake of internal combustion engines used to generate a correction noise, which the intake noise is superimposed. Thus, the level of the intake noise can be reduced or changed this being understood as correcting the intake noise. As an an example for such a device, in the intake system or in the exhaust system of an internal combustion engine can be used, the US 5 119 902 to call.

Nachteilig an der Verwendung der beschriebenen Lautsprecher ist deren Empfindlichkeit gegen Schmutz. Daher muss der Antrieb dieser elektromagnetischen Wandler gekapselt werden, wodurch ein zusätzlicher Aufwand anfällt. Außerdem muss der Aktuator in Form der Lautsprechermembran akustisch vom Motorraum abgeschirmt werden, da nur eine akustische Beeinflussung innerhalb der Systemgrenzen z. B. des Ansaugtraktes der Brennkraftmaschine gewünscht ist. Auch die Abschirmung stellt einen zusätzlichen Aufwand dar und erfordert Bauraum, der nicht in allen Fallen zur Verfügung steht.A disadvantage of the use of the speakers described is their sensitivity against dirt. Therefore, the drive of this electromagnetic converter must be encapsulated which results in additional expense. In addition, the actuator must be in shape the speaker diaphragm be acoustically shielded from the engine compartment, as only one acoustic influence within the system limits z. B. the intake of the Internal combustion engine is desired. The shield is an additional expense and requires space that is not available in all cases.

Aufgabe der Erfindung ist es daher, ein Leitungssystem mit elektromechanischem Wandler zur Erzeugung eines Geräusches zu schaffen, der kostengünstig in der Herstellung ist und wenig Bauraum erfordert. Diese Aufgabe wird durch die Merkmale der Patentansprüche 1, 2 und 7 gelöst. The object of the invention is therefore to provide a conduit system with electromechanical converter to create a sound that is inexpensive to manufacture and requires little space. This object is achieved by the features of claims 1, 2 and 7 solved.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung ist dadurch gekennzeichnet, dass der Antrieb des elektromechanischen Wandlers derart im Leitungssystem angebracht ist, dass dieser dem im Leitungssystem geförderten Gasstrom ausgesetzt ist. Durch den geförderten Gasstrom findet eine Kühlung des Antriebs statt, die eine übermäßige Aufheizung verhindert. Der elektromechanische Wandler ist üblicherweise ein Lautsprecher, wobei der Aktuator die Lautsprechermembran ist und der Antrieb durch eine elektrische Spule erfolgt, in die ein Spulenkörper eingebracht ist. Die Kühlung der genannten Bauteile ermöglicht die Wahl eines kleineren Antriebs für den Lautsprecher, da einer Überhitzung und dem daraus folgenden Versagen des Wandlers bei einer Dauerbeanspruchung entgegengewirkt werden kann. Dadurch kann in vorteilhafter Weise nicht nur Einbauraum und Gewicht gespart werden. Ein weiterer positiver Effekt ist die Möglichkeit, kostengünstigere Lautsprecher einsetzen zu können.The invention is characterized in that the drive of the electromechanical Transducer is mounted in the line system such that this in the line system is subjected to funded gas flow. Due to the pumped gas flow is a cooling of the drive, which prevents excessive heating. The electromechanical Converter is usually a speaker, wherein the actuator is the speaker diaphragm is and the drive is effected by an electric coil, in which a bobbin introduced is. The cooling of the components mentioned allows the choice of a smaller drive for the speaker, because of overheating and consequent failure of the converter can be counteracted by a continuous load. Thereby can be saved advantageously not only installation space and weight. Another positive effect is the ability to use less expensive speakers.

Alternativ kann vorgesehen werden, dass der Antrieb derart im Leitungssystem untergebracht ist, dass dieser mit einer durch den Filter gebildeten Reinseitedes Leitungsabschnitts kommuniziert. Der Antrieb kann auf diese Weise vor einer Verschmutzung geschützt werden, wenn er derart im Leitungssystem angebracht wird, dass er direkt mit dem geförderten Gas kommuniziert. Dies ist insbesondere der Fall, wenn der Antrieb direkt dem Gasstrom ausgesetzt ist. Der Vorteil bei der reinseitigen Anordnung ist der Wegfall einer Kapselung, die den empfindlichen Antrieb vor einer Verschmutzung bewahrt. Somit können auch durch diese Maßnahme Bauraum, Bauteilteilgewicht und Kosten eingespart werden.Alternatively it can be provided that the drive accommodated in the line system is that this with a clean side of the line section formed by the filter communicated. The drive can be protected in this way against contamination when installed in the ducting system in such a way that it is directly connected to the subsidized gas communicates. This is especially the case when the drive is direct exposed to the gas stream. The advantage with the pure-side arrangement is the omission an encapsulation that protects the sensitive drive from contamination. Consequently can also be saved by this measure space, component part weight and cost become.

Selbstverständlich können die Ausführungsformen der eingangs beschriebenen Ansprüche auch miteinander kombiniert werden, was zu einer Kombination der Vorteile führt. Der Hauptvorteil bei den beschriebenen Anordnungskonzepten ergibt sich aus dem Wegfall eines gesonderten Volumens zur Unterbringung des Antriebs für den elektromechanischen Wandler. Vorteilhaft können dabei beide Seiten der verwendeten Membran, die z. B. einen Lautsprecher bilden kann, mit dem Leitungsabschnitt des Systems kommunizieren und so die Geräuschemission beeinflussen. Dadurch lässt sich bei unveränderter Baugröße des Wandlers ein weitaus größerer Einfluss auf die Geräuschemission erzielen. Dieser Optimierungsschritt führt zu einer weiteren Verringerung des benötigten Einbauraumes.Of course, the embodiments of the claims described above be combined with each other, resulting in a combination of benefits. Of the The main advantage of the arrangement concepts described results from the omission a separate volume for housing the drive for the electromechanical Converter. Advantageously, both sides of the membrane used, the z. B. one Speaker can form, communicate with the line section of the system and so on affect the noise emission. This can be with unchanged size of the Converter to achieve a much greater impact on the noise emission. This optimization step leads to a further reduction of the required installation space.

Wenn beide Seiten der Membran zur Beeinflussung des Ansauggeräusches genutzt werden, kann eine akustische Abstimmung gemäß einer weiteren Ausbildung des Erfindungsgedankens durch zusätzliche Kanäle und/oder Volumina erfolgen. Dabei wird gezielt die Überlagerung der durch beide Seiten der Membran erzeugten Luftschwingungen genutzt. Vorteilhaft kann in Frequenzbereichen, die eine starke Korrektur durch den Lautsprecher oder anderen Wandler benötigen, durch Überlagerung eine Verstärkung der emittierten Schwingungen, in anderen Bereichen eine Abschwächung erreicht werden.If both sides of the membrane are used to influence the intake noise, may be an acoustic vote according to another embodiment of the inventive concept done by additional channels and / or volumes. It is targeted the Superposition of the generated by both sides of the membrane air vibrations used. Advantageously, in frequency ranges, a strong correction by the speaker or other transducers, by superimposing a gain of the emitted Vibrations, in other areas a weakening can be achieved.

Bei der Verwendung des Leitungssystems im Ansaugtrakt einer Brennkraftmaschine werden zur Erfüllung der erfindungsgemäßen Aufgabe Mittel einerseits zur Kontrolle der Geräuscherzeugung andererseits zur Anpassung des Ansauggeräusches an das Wunschgeräusch vorgesehen. Das Wunschgeräusch muss nicht notwendig zu einer Verminderung des Ansauggeräusches führen. Mit der beschriebenen Vorrichtung lässt sich das Geräusch im Rahmen der Leistung des elektromechanischen Wandlers an beliebige Geräuschcharakteristiken annähren. Dieser Prozess wird als Sound Design bezeichnet. Es hat sich nämlich gezeigt, dass der subjektive Eindruck des Ansauggeräusches von der Geräuschcharakteristik ebenso abhängt, wie vom absoluten Lärmpegel. Eine gezielte Veränderung des Ansauggeräusches mit Hilfe der beschriebenen Vorrichtung lässt sich in vielen Fällen jedoch leichter durchführen, als eine Verminderung oder Auslöschung. Der Bauraum für aufwendige herkömmliche akustische Maßnahmen wie Resonatoren oder Viertelwellenrohre kann zumindest teilweise eingespart werden. Der mögliche Aufbau der Mittel zur Kontrolle und Anpassung lässt sich beispielsweise der Patentanmeldung mit dem Aktenzeichen DE 199 49 685.4 entnehmen.When using the piping system in the intake tract of an internal combustion engine to fulfill the object of the invention means on the one hand to control the generation of noise on the other hand, to adapt the intake noise to the desired noise intended. The desire sound does not have to be necessary for a reduction lead the intake noise. With the device described can be the noise as part of the performance of the electromechanical transducer to any noise characteristics approximate one. This process is called sound design. It has shown that the subjective impression of the intake noise of the Noise characteristics as well as the absolute noise level. A targeted change the intake noise by means of the device described can be in However, many cases perform easier than a reduction or extinction. Of the Space for complex conventional acoustic measures such as resonators or Quarter wave tubes can be at least partially saved. The possible construction of the Means of control and adaptation can be, for example, the patent application with Refer to the file number DE 199 49 685.4.

Um eine optimale Anpassung des Ansauggeräusches zu erzielen, können die Mittel zur Kontrolle und Anpassung, die zum Beispiel durch eine elektronische Steuerung realisiert sein können, mit einem Speicher für typische Fahrzustände ausgestattet sein. Diese Fahrzustände können zusammen mit weiteren Kennfeldern in der Steuerung abgelegt werden und so die Kenngrößen für das zu erreichende Wunschgeräusch bilden. Durch den Speicher kann weiterhin eine Änderung der Geräuschcharakteristik der Brennkraftmaschine oder des Ansaugtraktes ausgeglichen werden, die durch Verschmutzung oder Alterung bewirkt wird. Die Steuerung bildet damit ein selbstlernendes System, wodurch vorteilhaft die Funktion über die Betriebszeit der Brennkraftmaschine uneingeschränkt aufrechterhalten werden kann.In order to achieve an optimal adaptation of the intake noise, the means for Control and adaptation, realized for example by an electronic control be equipped with a memory for typical driving conditions. These driving conditions can be stored together with other maps in the controller and thus form the parameters for the desired sound to be achieved. Through the store can continue to change the noise characteristics of the engine or the intake tract to be compensated by pollution or aging is effected. The control thus forms a self-learning system, which is advantageous the function over the operating time of the internal combustion engine maintained unrestricted can be.

Insbesondere bei der Verwendung des Leitungssystems als Ansaugtrakt für eine Brennkraftmaschine ergeben sich besonders vorteilhafte Einbauorte für den Antrieb des elektromechanischen Wandlers im Luftfiltergehäuse oder im Saugrohr. Dabei kann der Einbau sowohl auf der Reinseite des Filters, als auch im Ansaugluftstrom erfolgen, mit den bereits diskutierten Vorteilen der Vermeidung von Verschmutzungen und der Kühlung des Antriebs.In particular when using the line system as an intake tract for an internal combustion engine arise particularly advantageous installation locations for the drive of the electromechanical Converter in the air filter housing or in the intake manifold. In this case, the installation both on the clean side of the filter, as well as in the intake air flow, with the already discussed advantages of avoiding contamination and the cooling of the drive.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred embodiments of the invention are excluded from the claims also from the description and the drawing, wherein the individual features in each case alone or in the form of sub-combinations be realized in the embodiment of the invention and in other fields and can represent advantageous as well as protectable versions, for here Protection is claimed.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigen

Figur 1
das Blockschaltbild des erfindungsgemäßen Leitungssystems als Ansaugtrakt einer Brennkraftmaschine
Figur 2
schematisch den Einbau eines Lautsprechers als elektromechanischen Wand- ler in der Reinseite eines Luftfilters und
Figur 3
schematisch den Einbau eines Lautsprechers als elektromechanischen Wandler zwischen den Sammelräumen eines Resonanzsaugrohres.
Further details of the invention are described in the drawing with reference to schematic embodiments. Show here
FIG. 1
the block diagram of the conduit system according to the invention as the intake of an internal combustion engine
FIG. 2
schematically the installation of a loudspeaker as an electromechanical transducer in the clean side of an air filter and
FIG. 3
schematically the installation of a loudspeaker as an electromechanical transducer between the collecting chambers of a resonance intake.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Figur 1 ist eine Brennkraftmaschine 10 schematisch dargestellt. Diese besitzt einen Ansaugtrakt 11 mit einer Drosselklappe 12 und eine Abgasanlage 13. Die Richtung dei Ansaugluft sowie des Abgases ist durch Pfeile angedeutet.1 shows an internal combustion engine 10 is shown schematically. This has an intake tract 11 with a throttle valve 12 and an exhaust system 13. The direction of the intake air and the exhaust gas is indicated by arrows.

Im Ansaugtrakt ist im Bereich eines Leitungsabschnittes 25 ein elektromechanischer Wandler 14, der hier als Lautsprecher ausgeführt ist, angeordnet. An einem Ansaugstutzen 15 ist ein Sensor 16, hier als Mikrofon ausgeführt, angebracht. Weiterhin ist als Mittel 17 zur Kontrolle der Geräuscherzeugung durch einen Aktuator 26 des Wandlers 14 und zur Anpassung des Ansauggeräusches an mindestens ein Wunschgeräusch eine Steuerung vorgesehen, der ein durch den Sensor 16 aufgenommeneslstgeräuschsignal I sowie ein von der Brennkraftmaschine 10 abgenommenes Drehzahlsignal D zugeführt wird. Das Drehzahlsignal kann z. B. durch einen Drehzahlsensor 18 gemessen werden. Auch ist die Messung des Drosselklappenwinkels mit Hilfe eines Lagesensors 19 möglich. Dieser erzeugt einen weiteren Parameter P, der ebenfalls durch die Steuerung verarbeitet werden kann.In the intake tract is in the region of a line section 25 an electromechanical Transducer 14, which is designed here as a loudspeaker arranged. At an intake manifold 15 is a sensor 16, designed here as a microphone attached. Furthermore, as an agent 17 for controlling the generation of noise by an actuator 26 of the converter 14 and to adapt the intake noise to at least one desired sound a controller provided, the one received by the sensor 16 lstgeräuschsignal I and a removed from the internal combustion engine 10 speed signal D is supplied. The Speed signal can z. B. be measured by a speed sensor 18. Also is the Measurement of the throttle angle by means of a position sensor 19 possible. This generates another parameter P, which are also processed by the controller can.

Die Steuerung 17 erzeugt ein Steuersignal Ages, welches von dem elektromechanischen Wandler 14 in ein Korrekturgeräusch 20, 20' umgesetzt wird. Dieses wird dem Ansauggeräusch 21 der Brennkraftmaschine, welches sich durch den Ansaugtrakt 11 ausbreitet, überlagert. Hieraus ergibt sich ein Istgeräusch 22, welches z. B. am Ansaugstutzen 15 durch den Sensor 16 gemessen werden kann. Daraus resultiert das Istgeräuschsignal I.The controller 17 generates a control signal A ges , which is converted by the electromechanical transducer 14 into a correction sound 20, 20 '. This is superimposed on the intake noise 21 of the internal combustion engine, which propagates through the intake tract 11. This results in an actual noise 22, which z. B. can be measured by the sensor 16 at the intake manifold 15. This results in the Istgeräuschsignal I.

Der elektromechanische Wandler 14 besteht aus dem Aktuator 26, im Ausführungsbeispiel als Lautsprechermembran ausgeführt, und einem Antrieb 27, der durch eine Spule mit einem Kern gebildet ist. Der Antrieb 27 ragt in den Leitungsabschnitt 25 hinein und wird so zur Kühlung von der Ansaugluft beaufschlagt. Die mit dem Antrieb 27 verbundene Membranseite des Aktuators 26 bildet einen Teil der Wandung des Leitungsabschnitts 25, wodurch die Membranschwingungen als Korrekturgeräusch 20 direkt auf die Ansaugluftübertragen wird.The electromechanical transducer 14 consists of the actuator 26, in the embodiment designed as a speaker diaphragm, and a drive 27, which by a coil with a core is formed. The drive 27 projects into the line section 25 and becomes so acted upon for cooling by the intake air. The diaphragm side connected to the drive 27 of the actuator 26 forms part of the wall of the line section 25, whereby the membrane vibrations as correction sound 20 transmitted directly to the intake air becomes.

Weiter ist die dem Antrieb abgekehrte Membranseite mit einem Zusatzvolumen 28 verbunden, welches über eine Zusatzleitung 29 mit dem Leitungsabschnitt 25 kommuniziert. Durch den Abstand einer Leitungszuführung 30 von dem elektromechanischen Wandler 20, die Länge der Zusatzleitung 29 und der Größe des Zusatzvolumens 28 kann eineakustische Abstimmung erfolgen, so dass eine gezielte Überlagerung des durch die Zusatzleitung 29 dem Leitungsabschnitt 25 zugeführten Korrekturgeräusches 20' und dem Korrekturgeräusch 20 erreicht wird.Furthermore, the membrane side facing away from the drive is connected to an additional volume 28, which communicates via an additional line 29 with the line section 25. By the distance of a line feed 30 from the electromechanical transducer 20, the length of the additional line 29 and the size of the additional volume 28 may be an acoustic Voting done so that a targeted overlay of the through the additional line 29, the line section 25 supplied correction sound 20 'and the Correction noise 20 is achieved.

Die Steuerung 17 ist als digitaler Rechner aufgebaut. Das SteuersignalAges muss daher durch einen Digital-Analogwandler 24 in ein analoges Signal umgewandelt werden, mit dessen Hilfe der elektromechanische Wandler 14 angesteuert werden kann. Diese Ausführungsform stellt die günstigste Variante hinsichtlich des Komponentenaufwands, der Fertigungskosten und der Zuverlässigkeit der Vorrichtung dar. Genauso denkbar ist jedoch der Aufbau der Steuerung 17 als Analogrechner. Die Signale werden entsprechend analog verarbeitet und müssen evtl. vorher in Analogsignale gewandelt werden (je nachdem, ob die Sensoren digitale oder analoge Signale liefern). Das SteuersignalAges, welches eine analoge Steuerung 17 zur Verfügung stellt, muß dann nicht mehr gewandelt werden. Evtl. ist noch eine Verstärkung des Steuersignals Ages notwendig. Dies geschieht gegebenenfalls durch einen Verstärker 23. The controller 17 is constructed as a digital computer. The control signal A ges must therefore be converted by a digital-to-analog converter 24 into an analog signal, by means of which the electromechanical converter 14 can be controlled. This embodiment represents the most favorable variant in terms of the component cost, the manufacturing costs and the reliability of the device. Equally conceivable, however, is the structure of the controller 17 as an analog computer. The signals are processed analogously and may need to be converted into analog signals beforehand (depending on whether the sensors supply digital or analogue signals). The control signal A ges , which provides an analog controller 17, then no longer needs to be converted. Possibly. is still a gain of the control signal A ges necessary. This is optionally done by an amplifier 23.

Der Steuerung ist ein Speicher 31 zugeordnet. Dieser dient zur Abspeicherung von betriebsabhängigen Wunschgeräuschen, die ein Kennfeld zur Erzeugung des Korrekturgeräusches 20, 20' ergeben. Weiterhin können im Speicher Kennwerte abgelegt werden, die zu einer selbstlernenden Funktion der Steuerung genutzt werden. Damit werden ein schnelleres Ansprechen der Steuerung bei Änderungen der Betriebszustände und eine Anpassung der Arbeitsweise der Vorrichtung an alterungsbedingte Veränderungen der Brennkraftmaschine 10 und des Ansaugtraktes 11 möglich.The controller is associated with a memory 31. This is used to store operation-dependent Desired sounds that a map to generate the correction noise 20, 20 'result. Furthermore, characteristic values can be stored in the memory be used to a self-learning function of the controller. This will be one Faster response of the controller with changes in operating conditions and a Adapting the operation of the device to age-related changes in the Internal combustion engine 10 and the intake tract 11 possible.

In Figur 2 ist ein Filter 32 dargestellt, auf dessen Reinseite 33 im Filtergehäuse 34 der elektromechanische Wandler 14 im Luftstrom und geschützt vor Verschmutzungen angebracht ist. Das Filtergehäuse ist als Teil des Ansaugtraktes 11 ausgeführt. Die Luft strömt entsprechend der angedeuteten Pfeile vom Ansaugstutzen 15 durch den Filter 32 zu einem nicht dargestellten Saugrohr. Der elektromechanische Wandler ist in der Trennwand zwischen Ansaugstutzen und Filtergehäuse untergebracht, so dass beide Seiten der Membran das erzeugte Geräusch in den Ansaugtrakt abstrahlen. Einerseits findet eine Abstrahlung direkt in den Ansaugstutzen statt wobei eine Überlagerung mit dem Mündungsgeräusch direkt möglich ist. Andererseits wird das Geräusch in das reinseitige Gehäusevolumen des Luftfilters abgestrahlt. Um zum Ansaugstutzen zu kommen, müssen diese Luftschwingungen zunächst den Luftfilter durchtreten, wobei der Dämpfungseffekt des Filtermediums gezielt genutzt werden kann.In Figure 2, a filter 32 is shown, on the clean side 33 in the filter housing 34 of the electromechanical transducer 14 mounted in the air stream and protected from contamination is. The filter housing is designed as part of the intake tract 11. The air is flowing according to the indicated arrows from the intake manifold 15 through the filter 32 to a Suction tube, not shown. The electromechanical transducer is in the partition wall housed between intake manifold and filter housing, so that both sides of the Membrane emit the generated noise in the intake tract. On the one hand finds one Radiation directly into the intake manifold instead of an overlay with the muzzle noise is directly possible. On the other hand, the noise in the pure-side housing volume emitted by the air filter. In order to get to the intake manifold, must These air vibrations first pass through the air filter, wherein the damping effect the filter medium can be used specifically.

In Figur 3 ist ein Saugrohr 35 mit Resonanzaufladung dargestellt. Saugkanäle 36 gehen von zwei durch eine Zwischenwand 37 getrennte Resonanzkammern 38 ab. In der Zwischenwand ist eine Resonanzklappe 39 angeordnet, die abhängig vom Betriebszustand der nicht dargestellten Brennkraftmaschine geöffnet und geschlossen werden kann. Weiterhin ist in der Zwischenwand 37 der elektromechanische Wandler 14 untergebracht, wobei je eine Seite des Aktuators 26 auf je eine Resonanzkammer 38 wirkt.FIG. 3 shows a suction tube 35 with resonance charging. Suction channels 36 go of two separated by an intermediate wall 37 resonant chambers 38 from. In the partition a resonance flap 39 is arranged, which depends on the operating state the internal combustion engine, not shown, can be opened and closed. Farther is housed in the intermediate wall 37 of the electromechanical transducer 14, wherein each one side of the actuator 26 acts on a respective resonance chamber 38.

Claims (8)

  1. Duct system for conducting a gas, more especially intake duct of an internal combustion engine, said duct system containing
    a duct portion (25) with an intake opening,
    an electromagnetic transducer (14) for creating a noise which influences the gas flow in the duct portion, more especially to modify the intake noise of the internal combustion engine, which noise can be emitted via the intake opening, wherein the electromechanical transducer is provided with an actuator (26) for creating the noise, more especially a diaphragm, and a driving means (27) for the actuator, more especially an electric coil (32), characterised in that the driving means is mounted in the duct system in such a manner that the said driving means is exposed to the gas flow conveyed in the duct system.
  2. Duct system according to claim 1, characterised in that there is a filter (32) in the duct portion (25) for filtering the conveyed gas and the driving means (27) is accommodated in the duct system (25) in such a manner that the said driving means communicates with a filtered side (33) of the duct portion formed by the filter (32).
  3. Duct system according to one or both of the preceding claims, characterised in that the driving means is accommodated in a filter housing (34) for the said filter (32).
  4. Duct system according to one of both of claims 1 or 2, characterised in that the driving means is accommodated in an intake pipe (35) of an internal combustion engine.
  5. Duct system according to one of the preceding claims, wherein the actuator comprises the diaphragm, characterised in that the two sides of the diaphragm communicate with the duct portion.
  6. Duct system according to one of the preceding claims, characterised in that the electromechanical transducer communicates with the duct portion via an acoustically tuned additional duct (29) and/or additional volume (28).
  7. Use of the duct system according to one of the preceding claims in the intake duct of an internal combustion engine, characterised in that means (17) are provided for controlling the creation of noise by the actuator (26) and for adapting the intake noise to at least a desired noise.
  8. Use of the duct system according to claim 7, characterised in that the means (17) for controlling and adapting contain a memory for the operating conditions of the electromechanical transducer determined in operation.
EP01106988A 2000-05-02 2001-03-21 Ducting system with electromechanical converter producing a correction noise Expired - Lifetime EP1152132B1 (en)

Applications Claiming Priority (2)

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DE10021031A DE10021031A1 (en) 2000-05-02 2000-05-02 Line system with electromechanical transducer for generating a correction noise
DE10021031 2000-05-02

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EP1152132A1 EP1152132A1 (en) 2001-11-07
EP1152132B1 true EP1152132B1 (en) 2005-07-20

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EP1152132A1 (en) 2001-11-07
ES2244512T3 (en) 2005-12-16
DE10021031A1 (en) 2001-11-08
ATE299989T1 (en) 2005-08-15
DE50106755D1 (en) 2005-08-25

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