EP2801708A1 - Générateur acoustique d'un système antibruit agissant sur les bruits de gaz d'échappement et/ou les bruits d'admission d'un véhicule automobile - Google Patents

Générateur acoustique d'un système antibruit agissant sur les bruits de gaz d'échappement et/ou les bruits d'admission d'un véhicule automobile Download PDF

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Publication number
EP2801708A1
EP2801708A1 EP20140162199 EP14162199A EP2801708A1 EP 2801708 A1 EP2801708 A1 EP 2801708A1 EP 20140162199 EP20140162199 EP 20140162199 EP 14162199 A EP14162199 A EP 14162199A EP 2801708 A1 EP2801708 A1 EP 2801708A1
Authority
EP
European Patent Office
Prior art keywords
membrane
voice coil
sound generator
housing
permanent magnet
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
EP20140162199
Other languages
German (de)
English (en)
Other versions
EP2801708B1 (fr
Inventor
Jan Krüger
Manfred Nicolai
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.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
Eberspaecher Exhaust Technology GmbH and Co KG
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Filing date
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Publication of EP2801708A1 publication Critical patent/EP2801708A1/fr
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Publication of EP2801708B1 publication Critical patent/EP2801708B1/fr
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—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
    • 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
    • F02M35/12—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
    • 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
    • G10K11/1783—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
    • G10K11/17833—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions by using a self-diagnostic function or a malfunction prevention function, e.g. detecting abnormal output levels
    • 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
    • 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
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
    • 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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or 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
    • 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
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3212—Actuator details, e.g. composition or microstructure

Definitions

  • the invention relates to a sound generator for an anti-sound system for influencing sound waves conducted in exhaust systems of vehicles powered by internal combustion engines (exhaust noise) and / or for influencing sound waves conducted in intake systems of internal combustion engines (intake noise).
  • noises are generated as a result of the successive operating cycles (in particular suction and compression of a fuel-air mixture, working and expelling the combusted fuel-air mixture). These go through as a structure-borne noise the internal combustion engine and are radiated outside the internal combustion engine as airborne sound. On the other hand, the noise as airborne sound, together with the combusted fuel-air mixture, pass through an exhaust system in fluid communication with the internal combustion engine.
  • the noise that passes through the internal combustion engine as structure-borne noise can be well insulated and therefore generally poses no problem with regard to noise protection.
  • the an exhaust system of the internal combustion engine together with the combusted fuel-air mixture as airborne noise passing through are arranged in front of the mouth of the exhaust system arranged muffler, which are possibly downstream of existing catalysts.
  • Such silencers can work, for example, according to the absorption and / or reflection principle. Both modes of operation have the disadvantage that they require a comparatively large volume and set a relatively high resistance to the burned fuel-air mixture, whereby the overall efficiency of the vehicle decreases and fuel consumption increases.
  • Such antisound systems usually use a so-called filtered-mean-time squares (FxLMS) algorithm, which attempts the airborne sound carried in the exhaust system by outputting sound via at least one loudspeaker in fluid communication with the exhaust system Zero (in the case of sound cancellation) or a predetermined threshold (in the case of sound interference) to regulate.
  • FxLMS filtered-mean-time squares
  • the sound waves originating from the loudspeaker must correspond in amplitude and frequency to the sound waves carried in the exhaust system, but have a phase shift of 180 degrees relative thereto , although the sound waves of the airborne sound carried in the exhaust system and the sound waves of the anti-sounding generated by the loudspeaker are in frequency, and they have a phase shift of 180 degrees relative to one another, the sound waves do not correspond in amplitude but only to a weakening of the guided in the exhaust system sound waves of airborne sound.
  • the anti-noise is calculated separately by means of the FxLMS algorithm by determining an appropriate frequency and phase of two mutually shifted by 90 degrees sine waves, and the required amplitudes for these sine waves are calculated.
  • the aim of anti-sound systems is that the sound cancellation or sound influencing at least outside, but possibly also within the exhaust system is audible and measurable.
  • anti-noise is used in this document to distinguish the airborne sound carried in the exhaust system. By itself, Anti-Schall is ordinary airborne sound. It is emphasized that the present invention is not limited to the use of a FxLMS algorithm.
  • the intake system also called the intake system is referred to, includes all combustion air leading components of an internal combustion engine, which are located in front of the combustion chamber or the combustion chamber.
  • FIG. 1 shown in a schematic perspective view of the anti-sound system has a sound generator 3 in the form of a solid housing containing an electrodynamic speaker 2 and is connected via a Y-piece 1 to an exhaust system 4.
  • the Y-piece 1 has at the foot of the "Y" on an orifice 5 to emit exhaust gas guided in the exhaust system 4 to the outside.
  • the thermal load of the recorded in the sound generator 3 speaker 2 is kept low by the guided in the exhaust system 4 exhaust gas. This is necessary because conventional speakers can only work in a range of up to 200 ° C, the temperature of the exhaust gas guided in the exhaust system 4 but can be up to between 400 ° C and 700 ° C.
  • FIG. 2 schematically is a sectional view through the sound generator 3 using the example of a voice coil loudspeaker shown.
  • the loudspeaker 2 has a permanent magnet 21 and a funnel-shaped membrane 22, which are jointly carried by a loudspeaker basket 23.
  • the membrane 22 is radially outwardly connected via an elastic bead (not shown) to the loudspeaker frame 23 and has radially inside a voice coil (not shown), which is guided in bores in the permanent magnet 21.
  • an alternating current to the voice coil is via the voice coil due to the Lorentz force exerted a force on the diaphragm 22, which causes them to vibrate.
  • the loudspeaker basket 23 is supported radially on the outside by a horn 42, which is connected to the Y-piece 1 via a connecting tube 41.
  • the use of the bell mouth 42 is required because the area of the diaphragm 22 of the loudspeaker 2 is greater than the cross-sectional area of the exhaust system 4 in the region of the coupling of the sound. This is necessary to achieve the required sound fluxes.
  • the sound generator has a considerable volume of construction. Such is due to numerous restrictive space conditions in the underbody of a vehicle or in the intake system receiving engine compartment of a vehicle only limited available. Since significant noise flows are required in anti-noise systems for vehicles powered by internal combustion engines, it is also not possible to simply reduce the diameter of the loudspeaker. Rather, it is necessary that the area of the diaphragm of the loudspeaker is greater than or equal to the cross-sectional area of the exhaust system or the intake system in the coupling of the sound. This in turn requires the use of a bell tower as a transition between the diaphragm of the speaker and the connector to the exhaust system or intake.
  • Embodiments of a sound generator for an anti-noise system for influencing sound waves guided in exhaust systems or intake systems of vehicles powered by internal combustion engines have a housing with a connection opening for the fluid connection of an exhaust system, a loudspeaker frame supported by the housing, a membrane supported by the loudspeaker basket, a permanent magnet supported by the speaker basket, and a voice coil carried by a voice coil bobbin.
  • the voice coil is arranged in a magnetic field generated by the permanent magnet and connected to the membrane.
  • the membrane is arranged between the connection opening of the housing and the permanent magnet.
  • the membrane is funnel-shaped and in particular non-developable funnel-shaped (NAWI membrane) or spherical cap, wherein the tip or top surface of the funnel-shaped membrane or the geometric center of the spherical cap membrane facing away from the permanent magnet.
  • the base of the funnel-shaped or kugelkalottenförmigen membrane is thus facing the permanent magnet.
  • a distance of the tip or top surface of the funnel-shaped membrane or the geometric center of the spherical cap membrane from the permanent magnet is further spaced than the respective base surface of the membrane.
  • Non-developable funnel-shaped or spherical cap-shaped membranes are particularly stiff and thus allow a full-surface and uniform movement of the membrane. Alternatively, however, a cone-shaped membrane is possible.
  • the air volume between the membrane and the connection opening can thereby be reduced by between 4% and 6% of the total housing volume in favor of the volume of air located between membrane and housing on the other side of the membrane compared with a conventional construction of a sound generator for an anti-noise system ,
  • the overall volume of the speaker compared to a conventional structure can therefore be reduced by between 4% and 6%, in particular, the depth of the speaker can be reduced ,
  • a horn supported by the housing at the connection opening is furthermore provided, which can be connected via the connection opening to the intake system or exhaust system of a vehicle operated by internal combustion engine.
  • the loudspeaker basket is supported by the housing via the bell.
  • the tip or top surface of the funnel-shaped membrane or the geometric center of the spherical cap-shaped membrane is arranged in the horn.
  • the horn then support the loudspeaker basket radially outward.
  • the horn optionally has the shape of an oblique circular cone whose tip is capped, wherein the top or top surface of the funnel-shaped membrane or the geometric center of the spherical cap membrane a base of the horn penetrates the circular cone described and opens the circular cone at its capped tip into the connection opening of the housing.
  • the tip or top surface of the funnel-shaped membrane is arranged in or passes through a horn and / or the connection opening of the housing.
  • connection of the loudspeaker basket with the membrane attached to it on the housing is airtight.
  • this connection with the housing takes place indirectly via a bell-mouth attached airtight to the housing.
  • the membrane divides an inner volume of the housing into a part separated from the exhaust system or intake system and a part in fluid communication with the exhaust system or intake system via the connection opening.
  • the membrane is airtight. Furthermore, with the exception of the connection opening, the housing is airtight.
  • the two parts of the inner volume of the housing through the membrane (including an existing bead) and the inner wall of the housing and possibly an edge of the speaker basket are hermetically separated from each other.
  • the airtightly separated from the connection opening part of the inner volume of the housing thus forms an air cushion acting on the membrane.
  • the membrane operates on the back side to a closed volume and on the front side via the connection opening on the exhaust system or intake system.
  • This rear closed volume is larger with the same size of the housing compared to conventional sound generators, when the permanent magnet and the voice coil as proposed are arranged inside the volume spanned by the membrane and the loudspeaker frame, so that a ratio of rear volume to front volume increases ,
  • the acoustic performance increases with the same volume of construction as with conventional sound generators, so that, conversely, the same acoustic performance as with conventional sound generators can be achieved with a smaller overall volume.
  • the loudspeaker basket further carries a stop damper made of elastic material, which is arranged between the membrane or a centrally carried by the membrane, the voice coil covering cap and the permanent magnet in particular centrally in the interior of the voice coil bobbin and fixed to the permanent magnet.
  • This damper is dimensioned so that it at deflections of the voice coil and thus the Membrane, which exceed a threshold value, against the membrane and / or centrally disposed in the membrane cap acts.
  • the stop damper also carries a centering device, which is connected to the voice coil bobbin or in the region of the voice coil bobbin with the membrane.
  • the centering device ensures the return of the membrane to the rest position and the centering of the voice coil relative to the permanent magnet.
  • the loudspeaker basket further carries a centering device, which is connected to the voice coil former or in the region of the voice coil carrier with the membrane, thus ensuring the return of the diaphragm to the rest position and the centering of the voice coil with respect to the permanent magnet.
  • the permanent magnet is arranged between the loudspeaker frame and the membrane.
  • the permanent magnet and the voice coil are arranged inside a volume spanned by the diaphragm and the loudspeaker frame. As a result, the depth of the speaker is reduced. This allows the construction volume of the sound generator at the same To reduce sound flow.
  • the membrane is connected to the loudspeaker frame via an airtight bead. This makes it possible to adjust the vibration behavior of the membrane by appropriate choice of material and dimensioning of the bead. Further, bead and membrane are made according to an embodiment of different materials.
  • the loudspeaker basket is made of metal or plastic.
  • the housing of the sound generator is formed of metal or plastic.
  • the housing of the sound generator is formed from two cup-shaped shells, which are soldered, welded, crimped, riveted, glued or screwed together airtight.
  • the membrane is made of metal and in particular of aluminum or titanium or of plastic and in particular of aromatic polyamides.
  • the permanent magnet has rare earths and in particular neodymium and is in particular formed from a neodymium-iron-boron alloy.
  • Embodiments of an anti-noise system for exhaust systems and / or intake systems of an internal combustion engine-operated vehicle have an anti-noise control and at least one sound generator as described above.
  • the voice coil of the at least one sound generator is electrically connected to the anti-ballast control.
  • the antisound controller is designed to generate a control signal and to the voice coil of the to spend at least one sound generator.
  • the control signal is suitable for extinguishing sound inside the exhaust system or intake system at least partially and preferably completely in magnitude and phase when the voice coil is operated with this control signal.
  • Embodiments of a motor vehicle include an internal combustion engine with an engine controller, an intake system and an exhaust system in fluid communication with the internal combustion engine, and the antisound system described above.
  • the at least one sound generator of the anti-ballast system is in fluid communication with the intake system and / or exhaust system.
  • the antisound control of the antisound system is connected to the engine control of the internal combustion engine of the vehicle.
  • FIG. 3 schematically is a sectional view through the sound generator 103 according to a first embodiment of the invention shown.
  • the sound generator 103 has a housing 131, which in its interior receives a modified voice coil speaker 102.
  • the loudspeaker 102 comprises a permanent magnet 121 made of neodymium-iron-boron alloy and a cone-shaped membrane 122 made of plastic, which are commonly carried by a loudspeaker basket 123 made of sheet steel.
  • the conical membrane 122 is connected at its base radially outward via an elastic bead 127 made of plastic with the loudspeaker frame 123.
  • the top surface of the cone-shaped membrane 122 is closed at the center by a cap 124.
  • a voice coil bobbin 125 which carries a voice coil 126, is attached to the diaphragm 122.
  • the voice coil 126 is disposed in a DC magnetic field generated by the permanent magnet 121.
  • the permanent magnet has a corresponding recess.
  • the permanent magnet 121 and the voice coil bobbin 125 are arranged with the voice coil 126 within the spanned by the loudspeaker frame 123 and the membrane 122 volume, so that the permanent magnet 121 is partially disposed within the cone 122 defined by the cone ', whereby a compact volume of the Speaker 102 is reached. Accordingly, the sound generator 103 can be made compact.
  • the top surface of the cone-shaped membrane 122 with the cap 124 is thus facing away from the loudspeaker basket 123 and also the permanent magnet 121, the base surface of the cone-shaped membrane 122 faces the loudspeaker basket 123 and also the permanent magnet 121.
  • the cap 124 comes into abutment against the stop damper 128, so that a vibration of the diaphragm 122 is damped.
  • the loudspeaker basket 123 is radially outwardly connected to an inner wall of the housing 131 of the sound generator 103, and is airtight connected to a horn 142, in which the tip of the membrane 122 projects.
  • the bell mouth 142 is connectable via a connection opening 132 of the sound generator 103 and a connecting pipe 141 with the intake system and / or exhaust system of a vehicle operated by internal combustion engine. Since the connection of the cap 124 to the membrane 122 and the connection of the membrane 122 on the bead 127 on the speaker basket 123 airtight, the speaker 102 so together with the horn 142 divides the internal volume of the sound generator 103 into two hermetically separate parts.
  • the diaphragm 122 of the speaker 102 is disposed in the installed state of the speaker 102 between the connection opening 132 of the sound generator 103 and the permanent magnet 121, and the permanent magnet 121 between the diaphragm 122 and the loudspeaker frame 123 is arranged.
  • the voice coil bobbin 125 with the voice coil 126 and the permanent magnet 121 are hermetically separated from the corrosive exhaust gas by the diaphragm 122.
  • FIG. 4 schematically is a sectional view through the sound generator 103 according to a second embodiment of the invention shown. Since this second embodiment of the above in connection with FIG. 3 is very similar to the embodiment described below, only on Differences received and otherwise referred to the above statements.
  • the second embodiment differs from the first embodiment described above in that the stopper damper 128 further carries a centering device 129 in the form of radially oriented plastic rods, which is connected to the voice coil bobbin 125.
  • Another centering device 143 in the form of a spider is spanned between the loudspeaker frame 123 and the voice coil bobbin 125.
  • the centering devices 129, 143 ensure the return of the diaphragm 122 to the rest position and the centering of the voice coil 126 relative to the permanent magnet 121. It is emphasized that one or both centering devices 129, 143 can be dispensed with.
  • FIG. 5 There is shown schematically an antisound system 7 which uses the sound generator 103 described above.
  • a first sound generator 103 is connected in the region of an orifice 5 via a Y-piece 1 and a connecting pipe 141 to an exhaust system 4 of a vehicle. About the mouth 5 guided exhaust gas is discharged to the outside in the exhaust system 4.
  • a first error microphone 9 is provided in the form of a pressure sensor.
  • the error microphone 9 measures pressure fluctuations and thus sound inside the Y-piece 1 in a section downstream of a region in which the fluid connection between the exhaust system 9 and the sound generator 103 takes place. It is emphasized, however, that the error microphone 9 is only optional.
  • a second sound generator 103 'with a second Speaker 102 ' is connected to an intake system 10 of the vehicle. Upstream of a region in which the fluid connection between the intake system 10 and the sound generator 103 'takes place, a second error microphone 9' is arranged in the intake system 10. Again, it is emphasized that the error microphone 9 'is only optional.
  • the flow direction of the guided in the intake system 10 and the air guided in the exhaust system 4 exhaust gas is shown by arrows.
  • the loudspeakers 102, 102 'of the sound generators 103, 103' and the error microphones 9, 9 ' are electrically connected to an anti-noise controller 8. Further, the anti-noise controller 8 is connected via a CAN bus to a motor controller 61 of an internal combustion engine 6. It is emphasized that the present invention is not limited to a CAN bus.
  • the exhaust system 4 may further comprise at least one arranged between the engine 6 and the Y-piece 1 catalyst (not shown) for cleaning the emitted from the engine 6 and guided in the exhaust system 4 exhaust gas.
  • FIG. 6 schematically a motor vehicle with an internal combustion engine 6, an exhaust system 4 and the above-described anti-noise system 7 is shown.
  • the sound generators and the speakers of the anti-noise system are in FIG. 6 not shown separately.
  • a cone-shaped diaphragm has been used for the speaker as above, the present invention is not limited thereto.
  • a NAWI membrane can be used.
  • a NAWI membrane is understood to mean a membrane whose shape can not be developed into a flat surface.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Exhaust Silencers (AREA)
EP14162199.5A 2013-05-08 2014-03-28 Générateur acoustique d'un système antibruit agissant sur les bruits de gaz d'échappement et/ou les bruits d'admission d'un véhicule automobile Active EP2801708B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013104810.2A DE102013104810A1 (de) 2013-05-08 2013-05-08 Schallerzeuger für ein antischall-system zur beeinflussung von abgasgeräuschen und/oder ansauggeräuschen eines kraftfahrzeugs

Publications (2)

Publication Number Publication Date
EP2801708A1 true EP2801708A1 (fr) 2014-11-12
EP2801708B1 EP2801708B1 (fr) 2016-01-20

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EP14162199.5A Active EP2801708B1 (fr) 2013-05-08 2014-03-28 Générateur acoustique d'un système antibruit agissant sur les bruits de gaz d'échappement et/ou les bruits d'admission d'un véhicule automobile

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Country Link
US (1) US9374632B2 (fr)
EP (1) EP2801708B1 (fr)
CN (1) CN104141521B (fr)
DE (1) DE102013104810A1 (fr)

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JP6177552B2 (ja) * 2013-03-15 2017-08-09 アルパイン株式会社 スピーカ装置
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EP0373188A1 (fr) 1988-02-19 1990-06-20 Noise Cancellation Tech Dispositif de silencieux de gas d'echappement pour moteur a combustion interne.
US5229556A (en) 1990-04-25 1993-07-20 Ford Motor Company Internal ported band pass enclosure for sound cancellation
US5233137A (en) 1990-04-25 1993-08-03 Ford Motor Company Protective anc loudspeaker membrane
US5432857A (en) 1990-04-25 1995-07-11 Ford Motor Company Dual bandpass secondary source
US5619020A (en) 1991-08-29 1997-04-08 Noise Cancellation Technologies, Inc. Muffler
US5343533A (en) 1992-04-06 1994-08-30 Ford Motor Company Transducer flux optimization
US5336856A (en) 1992-07-07 1994-08-09 Arvin Industries, Inc. Electronic muffler assembly with exhaust bypass
EP0674097A1 (fr) 1994-02-22 1995-09-27 ELECTRONIC SOUND ATTENUATION S.p.A. Silencieux actif de gaz d'échappement
US5600106A (en) 1994-05-24 1997-02-04 Noise Cancellation Technologies, Inc. Actively sound reduced muffler having a venturi effect configuration
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EP0916817A2 (fr) 1997-11-18 1999-05-19 LEISTRITZ AG & CO. Abgastechnik Silencieux actif
DE19751596A1 (de) 1997-11-21 1999-06-02 Leistritz Abgastech Aktiver Schalldämpfer
EP1055804A1 (fr) 1999-05-19 2000-11-29 LEISTRITZ AG & CO. Abgastechnik Amortisseur actif de bruit de gaz d'échappement
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US20050152569A1 (en) * 2004-01-14 2005-07-14 Pioneer Corporation And Tohoku Pioneer Corporation Speaker apparatus and method of manufacturing the same
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EP1627996A1 (fr) 2004-08-19 2006-02-22 J. Eberspächer GmbH & Co. KG Silencieux d'échappement actif
DE102006042224B3 (de) 2006-09-06 2008-01-17 J. Eberspächer GmbH & Co. KG Aktiver Schalldämpfer für eine Abgasanlage
EP2108791A1 (fr) 2008-04-09 2009-10-14 J. Eberspächer GmbH & Co. KG Silencieux actif
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DE102009031848A1 (de) 2009-07-03 2011-01-05 J. Eberspächer GmbH & Co. KG Abgasanlage mit aktivem Schalldämpfer
DE102009049280A1 (de) * 2009-10-13 2011-04-14 J. Eberspächer GmbH & Co. KG Aktiver Schalldämpfer

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CN104141521A (zh) 2014-11-12
US9374632B2 (en) 2016-06-21
EP2801708B1 (fr) 2016-01-20
US20140334633A1 (en) 2014-11-13
DE102013104810A1 (de) 2014-11-13

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