WO2001038700A1 - Dispositif actif d'attenuation de bruit d'un moteur comportant au moins deux sorties d'echappement - Google Patents
Dispositif actif d'attenuation de bruit d'un moteur comportant au moins deux sorties d'echappement Download PDFInfo
- Publication number
- WO2001038700A1 WO2001038700A1 PCT/FR2000/002830 FR0002830W WO0138700A1 WO 2001038700 A1 WO2001038700 A1 WO 2001038700A1 FR 0002830 W FR0002830 W FR 0002830W WO 0138700 A1 WO0138700 A1 WO 0138700A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- noise
- exhaust
- attenuation device
- exhaust outlets
- multiplexing
- Prior art date
Links
Classifications
-
- 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
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/02—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate silencers in series
-
- 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
- G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
-
- 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
- G10K2210/12822—Exhaust pipes or mufflers
Definitions
- Active engine noise reduction device with at least two exhaust outlets.
- the present invention relates to an active noise attenuation device in an engine exhaust system, of the type comprising at least two exhaust outlets, the device comprising, on the one hand, for each exhaust outlet, a proper transducer for emitting an anti-noise, and, on the other hand, at least one processing chain adapted for the generation of an anti-noise signal and the excitation of the transducers as a function of the signal d 'anti noise.
- Such devices are for example implemented on motor vehicles.
- an active device for attenuating the own noise is installed on the vehicle.
- the vehicle has several exhaust outlets, and for example two exhaust outlets opening at the rear end of the vehicle each on one side of the vehicle, two separate active attenuation devices are provided.
- Each device comprises, as known per se, a transducer, such as a loudspeaker, making it possible to emit, from an electrical signal, a sound wave forming the anti-noise.
- the transducer is located in the vicinity of the associated exhaust outlet.
- Each active attenuation device includes a power amplifier controlled by a computer, as well as a residual noise sensor. The output of the power amplifier is connected to the transducer.
- the noise sensor measures the residual noise, that is to say the noise made up of the difference between the noise to be attenuated and the anti-noise emitted by the transducer.
- a residual signal, representative of the residual noise is sent to the computer which is informed in real time of the amplitude correction, in frequency and phase to be added to the noise canceling.
- the computer has an analog and / or digital output to drive the amplifier.
- the object of the invention is to propose a noise attenuation device that can be implemented at the output of an engine equipped with at least two exhaust lines, the size and the cost of which are reduced.
- the subject of the invention is an active noise attenuation device of the aforementioned type, characterized in that it comprises, for at least two exhaust outlets, a single processing chain, which processing chain comprises at least one processing element common to each of the exhaust outlets.
- the device comprises one or more of the following characteristics:
- each residual noise sensor is connected to the single processing chain;
- Said processing chain comprises a single computer adapted to ensure the generation of an anti-noise signal specific to each exhaust outlet;
- - Said processing chain comprises a single amplifier adapted to ensure the amplification of the anti-noise signal specific to each exhaust outlet;
- the frequency of multiplexing / demultiplexing of the multiplexing and demultiplexing means is at least equal to 10 times the maximum frequency of the anti-noise signals; and - the multiplexing / demultiplexing frequency is at least equal to 10 kHz.
- FIG. 1 is a schematic view of an engine fitted with two exhaust lines and an active noise attenuation device according to the invention.
- the installation shown comprises a combustion engine 10, the outputs of which are connected to an exhaust network 12, as well as an active noise attenuation device 14 according to the invention.
- the exhaust network 12 comprises two separate exhaust lines 16A, 16B connected to the outputs of different cylinders of the engine. These lines are each installed on one side of the vehicle.
- Each exhaust line has two successive silencers 18A, 20A, and 18B, 20B.
- the lines end with exhaust outlets 22A, 22B.
- the active noise attenuation device 14 comprises, associated with each outlet 22A, 22B of the exhaust lines, an electromechanical transducer 24A, 24B adapted for the emission of an anti-noise in the vicinity of the outlet of the line d associated exhaust.
- electromechanical transducer 24A, 24B adapted for the emission of an anti-noise in the vicinity of the outlet of the line d associated exhaust.
- These transducers are for example loudspeakers or piezoelectric transducers.
- a residual noise sensor 26A, 26B is associated with each exhaust line 16A, 16B.
- Each residual noise sensor is installed in the immediate vicinity of the outlet 22A, 22B of the associated exhaust line.
- the sensors 26A, 26B are connected at the input of a chain 28 of generation, for each exhaust line, of an anti-noise signal and of excitation of the associated transducer as a function of the anti-noise signal.
- the transducers 24A, 24B are connected to the output of this chain 28.
- the chain 28 comprises at least one processing element common to the two exhaust lines 16A, 16B.
- the chain 28 comprises at the input a common computer 30 adapted for the shaping of an anti-noise signal.
- This computer 30 has two inputs 32A, 32B adapted to receive each a residual noise signal supplied respectively by the sensors 26A and 26B.
- the computer comprises a single signal processing processor, the calculation speed of which is sufficient, so that it can implement in real time two separate routines for shaping an anti-noise signal, each routine being associated with an exhaust line 16A, 16B.
- the processing processor advantageously comprises a high capacity dynamic memory, in particular greater than 128 kbytes. Its processing speed is advantageously greater than 100 million instructions per second (100 MIPS).
- Each of the anti-noise routines is adapted, as known per se, to produce a signal representative of an anti-noise, this signal being in phase opposition with the noise sound wave which it is desired to cancel, of the same amplitude. and of the same frequency.
- the computer 30 is provided with two separate outputs 34A, 34B respectively associated with the exhaust lines 16A and 16B. It is suitable for supplying, on each of its outputs, an anti-noise signal specific to the associated exhaust line.
- the two outputs 34A, 34B of the computer are connected to the same sequencer 36 of the chain 28.
- This sequencer is suitable for multiplexing the anti-noise signals associated with the two exhaust lines, in order to ensure amplification of a single multiplex signal before attacking, after demultiplexing, the transducers 22A and 22B.
- the multiplexer 36 is connected to the computer 30 for the timing thereof.
- the control frequency of the sequencer 36 is much higher than the frequency of the anti-noise signals.
- the frequency of control of the multiplexing operated by the sequencer 36 is fixed at 20 kHz.
- the single output of the sequencer 36 is connected to the input of a single amplifier 38 making it possible to increase the signal power by a level sufficient to allow the actuation of the transducers 24A, 24B.
- the output of amplifier 38 is connected to a second sequencer 40 common to the two exhaust lines. This sequencer 40 can be integrated into the amplifier. It is suitable for demultiplexing the amplified signal. To this end, the sequencer 40 is connected to the computer 30 in order to ensure the timing thereof.
- the sequencer 40 has two outputs 42A, 42B, each connected respectively to the transducers 24A and 24B. It is suitable for supplying on each of its outputs the component of the amplified signal specific to the channel considered in order to cause the excitation of the corresponding transducer as a function of the amplified anti-noise signal associated with the exhaust line.
- the device operates as follows.
- the residual noise sensor 26A, 26B For each exhaust line 16A, 16B, the residual noise sensor 26A, 26B produces a residual noise signal addressed to the computer 30.
- the latter implements two separate processing routines making it possible to produce on the two separate outputs 34A, 34B anti-noise signals specific to each exhaust line.
- the exhaust network comprises two separate exhaust lines connected to the outputs of each of the cylinders of an engine.
- the invention can be applied to an exhaust system comprising only two separate outlet sections from the same common exhaust section.
- the exhaust system includes an initial exhaust section connected to the cylinder assembly. This initial section is provided with a first exhaust silencer. Downstream of the first exhaust silencer, the exhaust network splits into two separate exhaust sections each provided with a second exhaust silencer. These separate exhaust sections each end with an exhaust outlet in the vicinity of each of which is provided a residual noise sensor and a loudspeaker.
- the exhaust system may include an initial section to which all of the engine cylinders are connected, this common section comprising one or more silencers.
- the last silencer considering the direction of gas flow, is provided with two or more exhaust outlets.
- Each of these exhaust outlets is associated with a residual noise sensor and a loudspeaker.
- the residual noise sensors and the speakers are connected to a single common processing chain.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU77985/00A AU7798500A (en) | 1999-11-25 | 2000-10-11 | Active device for reducing engine noise comprising at least two exhaust outlets |
DE10085230T DE10085230B3 (de) | 1999-11-25 | 2000-10-11 | Vorrichtung zur aktiven Verringerung des Geräusches eines Motors mit wenigstens zwei Auspuff-Auslässen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/14858 | 1999-11-25 | ||
FR9914858A FR2801634B1 (fr) | 1999-11-25 | 1999-11-25 | Dispositif actif d'attenuation de bruit d'un moteur comportant au moins deux sorties d'echappement |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001038700A1 true WO2001038700A1 (fr) | 2001-05-31 |
Family
ID=9552547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/002830 WO2001038700A1 (fr) | 1999-11-25 | 2000-10-11 | Dispositif actif d'attenuation de bruit d'un moteur comportant au moins deux sorties d'echappement |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU7798500A (fr) |
DE (1) | DE10085230B3 (fr) |
FR (1) | FR2801634B1 (fr) |
WO (1) | WO2001038700A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104251150A (zh) * | 2013-06-25 | 2014-12-31 | 埃贝施佩歇尔排气技术有限及两合公司 | 用于影响多流排放系统中的排放噪声的系统 |
CN108729982A (zh) * | 2018-02-28 | 2018-11-02 | 成英 | 用于车辆消声的综合测试冷却系统 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012200712B4 (de) | 2012-01-19 | 2015-07-09 | Eberspächer Exhaust Technology GmbH & Co. KG | Abgasvorrichtung für eine Brennkraftmaschine |
CN111051661A (zh) | 2017-08-31 | 2020-04-21 | 佛吉亚排放控制技术德国有限公司 | 排气系统及设有该排气系统的机动车辆 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0481450A1 (fr) * | 1990-10-19 | 1992-04-22 | HEINRICH GILLET GmbH & CO. KG | Dispositif de silencieux pour moteur à combustion interne |
NL9201278A (nl) * | 1992-03-10 | 1993-10-01 | Jacobus Lambertus Van Merkstei | Systeem voor het onderdrukken van geluid. |
US5691893A (en) * | 1992-10-21 | 1997-11-25 | Lotus Cars Limited | Adaptive control system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5848168A (en) * | 1996-11-04 | 1998-12-08 | Tenneco Automotive Inc. | Active noise conditioning system |
-
1999
- 1999-11-25 FR FR9914858A patent/FR2801634B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-11 DE DE10085230T patent/DE10085230B3/de not_active Expired - Fee Related
- 2000-10-11 AU AU77985/00A patent/AU7798500A/en not_active Abandoned
- 2000-10-11 WO PCT/FR2000/002830 patent/WO2001038700A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0481450A1 (fr) * | 1990-10-19 | 1992-04-22 | HEINRICH GILLET GmbH & CO. KG | Dispositif de silencieux pour moteur à combustion interne |
NL9201278A (nl) * | 1992-03-10 | 1993-10-01 | Jacobus Lambertus Van Merkstei | Systeem voor het onderdrukken van geluid. |
US5691893A (en) * | 1992-10-21 | 1997-11-25 | Lotus Cars Limited | Adaptive control system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104251150A (zh) * | 2013-06-25 | 2014-12-31 | 埃贝施佩歇尔排气技术有限及两合公司 | 用于影响多流排放系统中的排放噪声的系统 |
US9706295B2 (en) | 2013-06-25 | 2017-07-11 | Eberspächer Exhaust Technology GmbH & Co. KG | System for influencing exhaust noise in a multi-flow exhaust system |
CN108729982A (zh) * | 2018-02-28 | 2018-11-02 | 成英 | 用于车辆消声的综合测试冷却系统 |
Also Published As
Publication number | Publication date |
---|---|
AU7798500A (en) | 2001-06-04 |
FR2801634B1 (fr) | 2002-04-05 |
DE10085230B3 (de) | 2012-03-01 |
FR2801634A1 (fr) | 2001-06-01 |
DE10085230T1 (de) | 2003-04-24 |
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