EP1162600A2 - Contrôle actif du bruit d'admission dans un moteur d'une voiture - Google Patents

Contrôle actif du bruit d'admission dans un moteur d'une voiture Download PDF

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Publication number
EP1162600A2
EP1162600A2 EP01202131A EP01202131A EP1162600A2 EP 1162600 A2 EP1162600 A2 EP 1162600A2 EP 01202131 A EP01202131 A EP 01202131A EP 01202131 A EP01202131 A EP 01202131A EP 1162600 A2 EP1162600 A2 EP 1162600A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
air induction
speaker
noise
further including
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
EP01202131A
Other languages
German (de)
English (en)
Other versions
EP1162600A3 (fr
EP1162600B1 (fr
Inventor
Richard D. Mcwilliam
Ian R. Mclean
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.)
Continental Tire Canada Inc
Original Assignee
Siemens Canada Ltd
Siemens VDO Automotive Inc
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 Siemens Canada Ltd, Siemens VDO Automotive Inc filed Critical Siemens Canada Ltd
Publication of EP1162600A2 publication Critical patent/EP1162600A2/fr
Publication of EP1162600A3 publication Critical patent/EP1162600A3/fr
Application granted granted Critical
Publication of EP1162600B1 publication Critical patent/EP1162600B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—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
    • 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
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers

Definitions

  • This invention relates to an active control of automotive induction noise and, in particular, to an active dipole inlet using a drone cone speaker driver.
  • Active noise attenuation systems use a speaker to create a sound that attenuates engine noise.
  • the sound created is out of phase with the engine noise and combines with the engine noise to result in its reduction.
  • this sound is generated in proximity to the air induction system.
  • the speaker is placed in the mouth of air intake duct.
  • the present invention seeks to overcome the above mentioned problems.
  • an air induction system comprises an air induction body, a speaker with a first diaphragm disposed about the air induction body, and a second diaphragm spaced from the first diaphragm.
  • a signal, a sound wave is generated from the first diaphragm and transmitted to the second diaphragm.
  • the second diaphragm generates a noise attenuating sound.
  • a flow body may interconnect the first diaphragm to the second diaphragm.
  • a tube may be used as the flow body.
  • seals may interconnect the flow body to the first and second diaphragms, creating an inductive mass. This inductive mass serves to improve speaker response at low frequency ranges.
  • the first diaphragm may be disposed in the air induction body
  • the second diaphragm may be placed about the mouth of the body.
  • the second diaphragm is preferably flexible.
  • An air filter may also be disposed with the air induction body.
  • a control unit In communication with the speaker is a control unit, which serves to control noise attenuation by the invention.
  • the control unit generates a signal for the speaker with the first diaphragm.
  • the signal is then transmitted to the second diaphragm spaced from the first diaphragm.
  • the signal may be transmitted through a flow body. From the second diaphragm, a noise attenuating sound is created to limit engine noise.
  • the invention improves speaker response for noise attenuation systems at a low frequency range without sacrificing speaker response at higher frequencies.
  • Noise attenuation systems are thereby better able to respond to engine noises of low frequency.
  • the improved response is afforded without significant alteration to existing noise attenuation systems. Indeed, the system is easily implemented into existing air induction systems without much additional expense, cost, or labor to install.
  • FIG. 1 shows an embodiment of the invention.
  • the air induction system comprises air induction body 10, speaker 14 with first diaphragm 18, and second diaphragm 22, which is spaced from first diaphragm 18.
  • speaker 14 and first diaphragm 18 are disposed about air induction body 10. While first diaphragm 18 may be of a design well known, second diaphragm 22 is preferably flexible.
  • the air induction system may include flow body 26 interconnecting first diaphragm 18 and second diaphragm 22.
  • the flow body is a tube, although one skilled in the art may employ other forms to perform the same function of creating an inductive mass.
  • Seal 30 and seal 34 may serve to interconnect flow body 26 to first diaphragm 18 and second diaphragm 22, respectively.
  • Mouth 38 an opening as known in the art, may be part of air induction body 10. It is preferable that second diaphragm 22 be disposed about mouth 38 as pictured.
  • air filter 42 may also be disposed in air induction body 10 to filter incoming air in the direction of arrow A, which is in the direction of the vehicle engine.
  • Control unit 46 may be in communication with speaker 14 to thereby control sound output to attenuate engine noise.
  • control unit 46 may generate a signal through speaker 14 and first diaphragm 18.
  • the signal is transmitted to second diaphragm 22.
  • the signal may be transmitted through a sealed flow body such as a tube.
  • second diaphragm 22 generates a noise attenuating sound, which, as known, is generally out of phase with engine noise to thereby cancel sound.
  • the signal is thus transmitted through an inductive mass, which improves speaker response at low frequency ranges.
  • Figure 2 illustrates the benefit of the system. Speaker response is shown over sound frequency.
  • Line 50 illustrates speaker response of prior art systems over a wide frequency range. As shown, speaker response deteriorates at low sound frequencies. With the device of Figure 1, as shown by line 54 (dashed lines), speaker response improves to permit noise attenuation at low frequency ranges without sacrificing speaker response at higher frequency ranges.
  • FIG 3 shows the system in relation to vehicle throttle body 50 and vehicle engine 54. Throttle body 50 and vehicle engine 54 are both shown schematically. The system may be connected to throttle body 50 by means known in the art.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)
EP01202131A 2000-06-06 2001-06-01 Contrôle actif du bruit d'admission dans un moteur d'une voiture Expired - Lifetime EP1162600B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US20975300P 2000-06-06 2000-06-06
US209753P 2000-06-06
US86841401A 2001-05-16 2001-05-16
US868414 2001-05-16

Publications (3)

Publication Number Publication Date
EP1162600A2 true EP1162600A2 (fr) 2001-12-12
EP1162600A3 EP1162600A3 (fr) 2002-10-23
EP1162600B1 EP1162600B1 (fr) 2006-07-26

Family

ID=26904469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202131A Expired - Lifetime EP1162600B1 (fr) 2000-06-06 2001-06-01 Contrôle actif du bruit d'admission dans un moteur d'une voiture

Country Status (2)

Country Link
EP (1) EP1162600B1 (fr)
DE (1) DE60121677T2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10184371B2 (en) 2016-04-20 2019-01-22 General Electric Company Active noise cancelation systems and devices
US10436086B2 (en) 2014-12-19 2019-10-08 General Electric Company Active noise control system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076097A (en) * 1976-08-04 1978-02-28 Thomas Lowe Clarke Augmented passive radiator loudspeaker
US5446790A (en) * 1989-11-24 1995-08-29 Nippondenso Co., Ltd. Intake sound control apparatus
US5446249A (en) * 1993-07-13 1995-08-29 Digisonix, Inc. Dry acoustic system preventing condensation
EP0884471A2 (fr) * 1997-06-10 1998-12-16 Siemens Canada Limited Dispositif actif d'atténuation de bruit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076097A (en) * 1976-08-04 1978-02-28 Thomas Lowe Clarke Augmented passive radiator loudspeaker
US5446790A (en) * 1989-11-24 1995-08-29 Nippondenso Co., Ltd. Intake sound control apparatus
US5446249A (en) * 1993-07-13 1995-08-29 Digisonix, Inc. Dry acoustic system preventing condensation
EP0884471A2 (fr) * 1997-06-10 1998-12-16 Siemens Canada Limited Dispositif actif d'atténuation de bruit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10436086B2 (en) 2014-12-19 2019-10-08 General Electric Company Active noise control system
US10184371B2 (en) 2016-04-20 2019-01-22 General Electric Company Active noise cancelation systems and devices
US10494969B2 (en) 2016-04-20 2019-12-03 General Electric Company Active noise cancelation systems and devices

Also Published As

Publication number Publication date
EP1162600A3 (fr) 2002-10-23
EP1162600B1 (fr) 2006-07-26
DE60121677D1 (de) 2006-09-07
DE60121677T2 (de) 2006-12-07

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