EP1152132A1 - Système de conduite à convertisseur mécano-électronique donnante un bruit de correction - Google Patents

Système de conduite à convertisseur mécano-électronique donnante un bruit de correction Download PDF

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Publication number
EP1152132A1
EP1152132A1 EP01106988A EP01106988A EP1152132A1 EP 1152132 A1 EP1152132 A1 EP 1152132A1 EP 01106988 A EP01106988 A EP 01106988A EP 01106988 A EP01106988 A EP 01106988A EP 1152132 A1 EP1152132 A1 EP 1152132A1
Authority
EP
European Patent Office
Prior art keywords
noise
intake
drive
line
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.)
Granted
Application number
EP01106988A
Other languages
German (de)
English (en)
Other versions
EP1152132B1 (fr
Inventor
Rolf Dr. Schirmacher
Franc Pricken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP1152132A1 publication Critical patent/EP1152132A1/fr
Application granted granted Critical
Publication of EP1152132B1 publication Critical patent/EP1152132B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 line system for the passage of a gas, in particular a Intake tract of an internal combustion engine, which is an electromagnetic converter Generating a noise influencing the gas flow in the line section, according to the preamble of claim 1.
  • Electromechanical transducers of the type described in the introduction are usually used as loudspeakers executed and are for example in the intake area of internal combustion engines used to generate a correction sound, which is the intake noise is superimposed. This can reduce or even change the level of the intake noise are, which is interpreted as a correction of the intake noise.
  • a device in the intake system or in the exhaust system of an internal combustion engine US 5 119 902 can be used.
  • the disadvantage of using the speakers described is their sensitivity against dirt. Therefore, the drive of this electromagnetic transducer must be encapsulated be, which incurs additional effort.
  • the actuator must also be in shape the loudspeaker diaphragm are acoustically shielded from the engine compartment, since only one acoustic influence within the system limits e.g. B. the intake tract of Internal combustion engine is desired.
  • the shielding also involves additional effort represents and requires installation space that is not available in all cases.
  • the object of the invention is therefore a line system with an electromechanical converter to create a sound that is inexpensive to manufacture and requires little installation space. This object is achieved by the features of patent claims 1, 2 and 7 solved.
  • the invention is characterized in that the drive of the electromechanical Transducer is mounted in the line system in such a way that it is in the line system extracted gas stream is exposed.
  • the gas flow conveyed provides cooling of the drive instead, which prevents excessive heating.
  • the electromechanical The transducer is usually a loudspeaker, the actuator being the loudspeaker membrane is and the drive is carried out by an electrical coil into which a coil body is introduced is.
  • the cooling of the components mentioned enables the selection of a smaller drive for the speaker because of overheating and the resulting failure of the converter can be counteracted in the event of continuous use. Thereby Not only can installation space and weight be saved in an advantageous manner. Another positive effect is the possibility to use cheaper speakers.
  • the drive is accommodated in the line system in this way is that it has a clean side of the line section formed by the filter communicates.
  • the drive can be protected against contamination if it is installed in the pipe system in such a way that it can be connected directly to the pumped gas communicated. This is especially the case when the drive is direct is exposed to the gas flow.
  • the advantage of the clean-sided arrangement is the elimination an encapsulation that protects the sensitive drive from contamination. Consequently can also save space, part weight and costs through this measure become.
  • both sides of the membrane are used to influence the intake noise, can an acoustic tuning according to a further embodiment of the inventive concept through additional channels and / or volumes. In doing so, the Superposition of the air vibrations generated by both sides of the membrane is used. Can be advantageous in frequency ranges that a strong correction by the speaker or other converters need to be amplified by superimposing the emitted Vibrations, weakening can be achieved in other areas.
  • the pipe system in the intake tract of an internal combustion engine When using the pipe system in the intake tract of an internal combustion engine to achieve 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 desired sound does not have to be reduced of the intake noise.
  • the noise can be any noise characteristics within the scope of the performance of the electromechanical transducer approximate. This process is called sound design. It It has been shown that the subjective impression of the intake noise from the Noise characteristics depend as well as on the absolute noise level. A targeted change the intake noise with the help of the device described can be in In many cases, however, it is easier to carry out than a reduction or extinction.
  • the Space for complex conventional acoustic measures such as resonators or Quarter wave tubes can be saved at least partially.
  • the possible structure of the Means of control and adaptation can be used, for example, with the patent application see file number DE 199 49 685.4.
  • the means for Control and adjustment which is implemented, for example, by an electronic control can be equipped with a memory for typical driving conditions. These driving conditions can be stored in the control along with other maps and thus form the parameters for the desired sound to be achieved. Through the store may continue to change the noise characteristics of the internal combustion engine or the intake tract can be compensated for by pollution or aging is effected.
  • the control thus forms a self-learning system, which is advantageous maintain the function without restriction over the operating time of the internal combustion engine can be.
  • FIG. 10 An internal combustion engine 10 is shown schematically in FIG. 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 one is located in the area of a line section 25 in the intake tract Converter 14, which is designed here as a speaker, arranged.
  • a sensor 16 On an intake manifold 15 is a sensor 16, here designed as a microphone, attached.
  • a speed signal D taken from the internal combustion engine 10 is supplied.
  • the Speed signal can e.g. B. measured by a speed sensor 18. That too is Measurement of the throttle valve angle possible with the help of a position sensor 19. This creates another parameter P, which are also processed by the controller can.
  • the controller 17 generates a control signal A tot which is converted by the electromechanical converter 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, for. B. can be measured on the intake manifold 15 by the sensor 16. This results in the actual noise signal I.
  • the electromechanical converter 14 consists of the actuator 26, in the exemplary embodiment designed as a loudspeaker diaphragm, and a drive 27 which is connected by a coil a core is formed.
  • the drive 27 projects into the line section 25 and becomes so acted upon by the intake air for cooling.
  • the membrane side connected to the drive 27 of the actuator 26 forms part of the wall of the line section 25, whereby transmit the membrane vibrations as correction sound 20 directly to the intake air becomes.
  • the diaphragm side facing away from the drive is connected to an additional volume 28, which communicates with the line section 25 via an additional line 29.
  • an additional line 29 By the distance of a line feed 30 from the electromechanical converter 20, the length of the additional line 29 and the size of the additional volume 28 can be acoustic Coordination takes place so that a targeted overlay of the by the additional line 29 the correction noise 20 'fed to the line section 25 and the Correction sound 20 is reached.
  • the controller 17 is constructed as a digital computer.
  • the control signal A tot must therefore be converted by a digital-to-analog converter 24 into an analog signal, with the aid of which the electromechanical converter 14 can be controlled.
  • This embodiment represents the cheapest variant in terms of component complexity, manufacturing costs and the reliability of the device.
  • the construction of the control 17 as an analog computer is equally conceivable.
  • the signals are processed analogously and may have to be converted into analog signals beforehand (depending on whether the sensors deliver digital or analog signals).
  • the control signal A tot which provides an analog control 17, then no longer has to be converted. Possibly. an amplification of the control signal A ges is still necessary. This may be done by an amplifier 23.
  • a memory 31 is assigned to the controller. This is used to save company-dependent Desired noise, which is a map for generating the correction noise 20, 20 'result. Characteristic values can also be stored in the memory can be used for a self-learning function of the control. This will be a the controller responds faster when the operating status changes and a Adaptation of 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 in the air flow and protected against contamination attached is.
  • the filter housing is designed as part of the intake tract 11.
  • the air flows according to the indicated arrows from the intake manifold 15 through the filter 32 to one not shown intake manifold.
  • the electromechanical transducer is in the partition housed between intake manifold and filter housing, so that both sides of the Radiate the generated noise into the intake tract.
  • Radiation directly into the intake manifold instead of being overlaid with the muzzle noise is possible directly.
  • the noise is in the purely housing volume of the air filter emitted. To get to the intake manifold, you have to these air vibrations first pass through the air filter, with the damping effect of the filter medium can be used specifically.
  • FIG. 3 shows a suction pipe 35 with resonance charging.
  • Suction channels 36 go from two resonance chambers 38 separated by an intermediate wall 37.
  • a resonance flap 39 is arranged, which depends on the operating state the internal combustion engine, not shown, can be opened and closed.
  • the electromechanical transducer 14 is accommodated in the intermediate wall 37, wherein one side of the actuator 26 acts on one 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)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
EP01106988A 2000-05-02 2001-03-21 Système de conduite à convertisseur mécano-électronique donnant un bruit de correction Expired - Lifetime EP1152132B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10021031 2000-05-02
DE10021031A DE10021031A1 (de) 2000-05-02 2000-05-02 Leitungssystem mit elektromechanischem Wandler zur Erzeugung eines Korrekturgeräusches

Publications (2)

Publication Number Publication Date
EP1152132A1 true EP1152132A1 (fr) 2001-11-07
EP1152132B1 EP1152132B1 (fr) 2005-07-20

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EP01106988A Expired - Lifetime EP1152132B1 (fr) 2000-05-02 2001-03-21 Système de conduite à convertisseur mécano-électronique donnant un bruit de correction

Country Status (5)

Country Link
EP (1) EP1152132B1 (fr)
JP (1) JP2001317420A (fr)
AT (1) ATE299989T1 (fr)
DE (2) DE10021031A1 (fr)
ES (1) ES2244512T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1193683A2 (fr) * 2000-09-20 2002-04-03 Siemens Automotive Inc. Commande pour l'élimination active du bruit
EP1313090A2 (fr) * 2001-11-15 2003-05-21 Siemens VDO Automotive Inc. Système actif de suppression du bruit avec un résonateur de Helmholtz
EP1717433A2 (fr) * 2005-04-25 2006-11-02 Benteler Automobiltechnik GmbH Silencieux d'admission actif
DE102011000412A1 (de) * 2011-01-31 2012-08-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolbenmotor
EP2138700A3 (fr) * 2008-06-25 2013-01-16 Mahle International GmbH Filtre d'air et dispositif d'air frais équipé de celui-ci
DE10322570B4 (de) * 2003-05-20 2013-04-11 Mahle Filtersysteme Gmbh Schalldämpfungsvorrichtung bei einem Kraftfahrzeug
DE102015106000A1 (de) * 2015-04-20 2016-10-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Schallgenerator für ein Kraftfahrzeug

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030045423A (ko) * 2001-12-04 2003-06-11 현대자동차주식회사 레조네이터를 이용한 압력변동 저감형 차량의 흡기시스템
DE20207299U1 (de) 2002-05-10 2002-09-12 Filterwerk Mann + Hummel GmbH, 71638 Ludwigsburg Vorrichtung zur Beeinflussung des Schalls im Ansaugtrakt eines Verbrennungsmotors
DE202013009278U1 (de) * 2013-10-19 2015-01-21 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Akustische Warnvorrichtung und Kraftfahrzeug mit einerakustischen Warnvorrichtung
DE102015212041A1 (de) * 2015-06-29 2016-12-29 Mahle International Gmbh Gasführende Einrichtung
WO2018234212A1 (fr) 2017-06-23 2018-12-27 Tenneco Gmbh Haut-parleur variable pour un système d'échappement
DE102017113919A1 (de) * 2017-06-23 2018-12-27 Tenneco Gmbh Variabler Lautsprecher für eine Abgasanlage
WO2022172459A1 (fr) * 2021-02-15 2022-08-18 ヤマハ発動機株式会社 Unité moteur

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US5571239A (en) * 1994-11-30 1996-11-05 Nippondenso Co., Ltd. Noise control apparatus for internal combustion engine
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WO2000005489A1 (fr) * 1998-07-22 2000-02-03 Friedmund Nagel Dispositif et procede permettant de reduire les emissions sonores dans le cas de moteurs a combustion interne et de les diagnostiquer
FR2783869A1 (fr) * 1998-09-24 2000-03-31 Ecia Equip Composants Ind Auto Systeme anti-bruit de ligne d'echappement de vehicule automobile

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JPH03222854A (ja) * 1989-11-24 1991-10-01 Nippon Soken Inc 吸気音制御装置
DE19540099A1 (de) * 1994-10-27 1996-05-02 Unisia Jecs Corp Aktive Geräuschreduzierung für ein Fahrzeug
US5571239A (en) * 1994-11-30 1996-11-05 Nippondenso Co., Ltd. Noise control apparatus for internal combustion engine
US5828759A (en) * 1995-11-30 1998-10-27 Siemens Electric Limited System and method for reducing engine noise
WO2000005489A1 (fr) * 1998-07-22 2000-02-03 Friedmund Nagel Dispositif et procede permettant de reduire les emissions sonores dans le cas de moteurs a combustion interne et de les diagnostiquer
FR2783869A1 (fr) * 1998-09-24 2000-03-31 Ecia Equip Composants Ind Auto Systeme anti-bruit de ligne d'echappement de vehicule automobile

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1193683A2 (fr) * 2000-09-20 2002-04-03 Siemens Automotive Inc. Commande pour l'élimination active du bruit
EP1193683A3 (fr) * 2000-09-20 2003-10-01 Siemens Automotive Inc. Commande pour l'élimination active du bruit
EP1313090A2 (fr) * 2001-11-15 2003-05-21 Siemens VDO Automotive Inc. Système actif de suppression du bruit avec un résonateur de Helmholtz
DE10322570B4 (de) * 2003-05-20 2013-04-11 Mahle Filtersysteme Gmbh Schalldämpfungsvorrichtung bei einem Kraftfahrzeug
EP1717433A2 (fr) * 2005-04-25 2006-11-02 Benteler Automobiltechnik GmbH Silencieux d'admission actif
EP1717433A3 (fr) * 2005-04-25 2011-06-22 Benteler Automobiltechnik GmbH Silencieux d'admission actif
EP2138700A3 (fr) * 2008-06-25 2013-01-16 Mahle International GmbH Filtre d'air et dispositif d'air frais équipé de celui-ci
DE102011000412A1 (de) * 2011-01-31 2012-08-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolbenmotor
DE102015106000A1 (de) * 2015-04-20 2016-10-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Schallgenerator für ein Kraftfahrzeug

Also Published As

Publication number Publication date
JP2001317420A (ja) 2001-11-16
DE10021031A1 (de) 2001-11-08
ATE299989T1 (de) 2005-08-15
ES2244512T3 (es) 2005-12-16
EP1152132B1 (fr) 2005-07-20
DE50106755D1 (de) 2005-08-25

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