EP1982055A1 - Method for producing a frequency spectrum in an exhaust pipe of an internal combustion piston engine - Google Patents

Method for producing a frequency spectrum in an exhaust pipe of an internal combustion piston engine

Info

Publication number
EP1982055A1
EP1982055A1 EP03757989A EP03757989A EP1982055A1 EP 1982055 A1 EP1982055 A1 EP 1982055A1 EP 03757989 A EP03757989 A EP 03757989A EP 03757989 A EP03757989 A EP 03757989A EP 1982055 A1 EP1982055 A1 EP 1982055A1
Authority
EP
European Patent Office
Prior art keywords
exhaust pipe
frequency spectrum
throttle valve
signal generator
producing
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
EP03757989A
Other languages
German (de)
French (fr)
Other versions
EP1982055B1 (en
Inventor
Jörg Hansen
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.)
AKUVIB Engineering and Testing GmbH
Original Assignee
AKUVIB Engineering and Testing 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 AKUVIB Engineering and Testing GmbH filed Critical AKUVIB Engineering and Testing GmbH
Publication of EP1982055A1 publication Critical patent/EP1982055A1/en
Application granted granted Critical
Publication of EP1982055B1 publication Critical patent/EP1982055B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/168—Silencing apparatus characterised by method of silencing by using movable parts for controlling or modifying silencing characteristics only
    • 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
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
    • 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
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
    • 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
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/02—Synthesis of acoustic waves
    • 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
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/10—Tubes having non-circular cross section

Definitions

  • the invention relates to a method for generating a frequency spectrum in an exhaust pipe of a reciprocating piston machine according to the preamble of claim 1 and a device suitable therefor.
  • EP 0 649 494 B1 it is intended to achieve a reduction in the sound level or a change in the timbre by damping with the throttle valve acting as a flow modulator in the exhaust pipe.
  • the vibration of the throttle valve only serves to calm the flow.
  • Increasing the roughness which is synonymous with a sportier sound, is not possible.
  • the invention has for its object to provide a method for generating a frequency spectrum in an exhaust pipe of a reciprocating engine, in which a frequency spectrum in the sense of a sound design is generated by additional sound generation.
  • Another object of the invention is to provide devices suitable for sound design.
  • the drive of the throttle valve is controlled with a signal generator such that the oscillating throttle valve generates the desired frequency spectrum.
  • noise or pressure pulsations and modulations can also be generated and superimposed on the flow in the exhaust pipe.
  • a programming unit can generate and superimpose signal patterns that have no relation to the motor or the flow.
  • the throttle valve is used not only for damping, but also for sound generation or the generation of additional pressure fluctuations.
  • the connected pipelines By suitably dimensioning the connected pipelines, they can be resonated in a targeted manner or used as a resonance body for the desired amplification of certain frequencies.
  • the invention makes it possible to carry out a sound design in the exhaust gas flow of a reciprocating piston engine, whereby reciprocating piston engines are primarily to be understood as internal combustion engines such as gasoline and diesel engines.
  • Figure 1 is a schematic representation of the control of the sound design in one
  • FIG. 2 is an illustration in which the exhaust pipe is segmented.
  • FIG. 1 shows an exhaust pipe 1 with a flange 2 and a resonance pipe 3.
  • a throttle valve 4 with a drive 5 is arranged in the exhaust pipe 1.
  • Sensors 6a, 6b, 6c and 6d are arranged on the exhaust pipe 1 and are connected to a signal generator 8 and a control unit 11 for the drive 5.
  • the signal generator 8 is also connected to a programming unit 9.
  • Engine data sensors 7 are also connected to signal generator 8, as are external sensors 10 from the vehicle interior.

Landscapes

  • 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)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Exhaust Silencers (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a method for producing a frequency spectrum in an internal combustion piston engine, wherein a throttle valve functioning as a flow modulator is displaced in an oscillating manner inside the exhaust pipe, such that the frequency spectrum is modified in the exhaust flow. The drive of the throttle valve is controlled by means of a signal generator such that the oscillating throttle valve produces the desired frequency spectrum.

Description

Verfahren zum Erzeugen eines Frequenzspektrums in einer Auspuffrohrleitung einerMethod for generating a frequency spectrum in an exhaust pipe
Hubkolbenmaschinereciprocating engine
Die Erfindung betrifft ein Verfahren zum Erzeugen eines Frequenzspektrums in einer Aus- puffirohrleitung einer Hubkolbenmaschine gemäß dem Oberbegriff des Anspruchs 1 sowie eine dafür geeignete Vorrichtung.The invention relates to a method for generating a frequency spectrum in an exhaust pipe of a reciprocating piston machine according to the preamble of claim 1 and a device suitable therefor.
Aus der EP 0 649 494 Bl ist es bekannt, durch eine in der Auspuffrohrleitung als Durchflussmodulator fungierende Drosselklappe den Schallpegel bzw. die Klangfarbe der durch den Abgasstrom erzeugt wird, zu verändern. Es wird auch vorgeschlagen, durch Dämpfung eines bevorzugten Frequenzbereiches die Klangfarbe der Auspuffrohrleitung zu verändern. So soll erreicht werden, dass die Auspuffanlage entweder Geräusche von sportlichem Klang oder stärker gedämpfte Geräusche abstrahlt.From EP 0 649 494 B1 it is known to change the sound level or the timbre generated by the exhaust gas flow by means of a throttle valve which acts as a flow modulator in the exhaust pipe. It is also proposed to change the tone color of the exhaust pipe by damping a preferred frequency range. This is to ensure that the exhaust system emits either sounds of a sporty sound or more muffled sounds.
Gemäß der teclinischen Lehre der EP 0 649 494 Bl ist vorgesehen, eine Verminderung der Schallpegel bzw. eine Veränderung der Klangfarbe durch Dämpfung mit der in der Auspuffrohrleitung angeordneten als Durchflussmodulator fungierenden Drosselklappe zu erzielen. Die Schwingung der Drosselklappe dient einzig der Strömungsberuhigung. Somit ist eine Veränderung der Klangfarbe nur in einem sehr begrenzten Umfang möglich. Eine Erhöhung der Rauhigkeit, gleichbedeutend mit einem sportlicheren Klang, ist nicht möglich. Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Erzeugen eines Frequenzspektrums in einer Auspuffrohrleitung einer Hubkolbenmaschine zur Verfügung zu stellen, bei dem durch zusätzliche Schallerzeugung ein Frequenzspektrum im Sinne eines Sounddesigns erzeugt wird. Eine weitere Aufgabe der Erfindung liegt darin, für das Sounddesign geeignete Vorrichtungen zur Verfügung zu stellen.According to the technical teaching of EP 0 649 494 B1, it is intended to achieve a reduction in the sound level or a change in the timbre by damping with the throttle valve acting as a flow modulator in the exhaust pipe. The vibration of the throttle valve only serves to calm the flow. This means that the timbre can only be changed to a very limited extent. Increasing the roughness, which is synonymous with a sportier sound, is not possible. The invention has for its object to provide a method for generating a frequency spectrum in an exhaust pipe of a reciprocating engine, in which a frequency spectrum in the sense of a sound design is generated by additional sound generation. Another object of the invention is to provide devices suitable for sound design.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.
Weiterbildungen erfolgen gemäß den Merkmalen der Unteransprüche.Further developments take place according to the characteristics of the subclaims.
Gemäß der Erfindung wird der Antrieb der Drosselklappe mit einem Signalgenerator derart gesteuert, dass die schwingende Drosselklappe das gewünschte Frequenzspektrum erzeugt. Auf diese Weise können Geräusche bzw. Druckpulsationen und -modulationen zusätzlich erzeugt und der Strömung in der Auspuffrohrleitung überlagert werden.According to the invention, the drive of the throttle valve is controlled with a signal generator such that the oscillating throttle valve generates the desired frequency spectrum. In this way, noise or pressure pulsations and modulations can also be generated and superimposed on the flow in the exhaust pipe.
Es ist auch möglich, über einen Regelkreis das gewünschte Frequenzspektrum zu überwachen und zu regeln.It is also possible to monitor and regulate the desired frequency spectrum via a control loop.
Zusätzlich können über eine Programmiereinheit Signalmuster, die in keiner Beziehung zum Motor bzw. der Strömung stehen, generiert und überlagert werden.In addition, a programming unit can generate and superimpose signal patterns that have no relation to the motor or the flow.
Erfindungsgemäß wird die Drosselklappe nicht nur zur Bedämpfung, sondern auch zur Schallgenerierung bzw. der Erzeugung von zusätzlichen Druckfluktuationen benutzt.According to the invention, the throttle valve is used not only for damping, but also for sound generation or the generation of additional pressure fluctuations.
Durch eine geeignete Dimensionierung der angeschlossenen Rohrleitungen können diese gezielt in Resonanz versetzt werden bzw. als Resonanzkörper zur gewollten Verstärkung bestimmter Frequenzen benutzt werden.By suitably dimensioning the connected pipelines, they can be resonated in a targeted manner or used as a resonance body for the desired amplification of certain frequencies.
Durch die Erfindung ist es möglich, ein Sound-Design im Abgasstrom einer Hubkolbenmaschine vorzunehmen, wobei unter Hubkolbenmaschinen in erster Linie Verbrennungsmaschinen wie Otto- und Dieselmotoren zu verstehen sind.The invention makes it possible to carry out a sound design in the exhaust gas flow of a reciprocating piston engine, whereby reciprocating piston engines are primarily to be understood as internal combustion engines such as gasoline and diesel engines.
Es ist auch möglich, die Auspuffrohrleitung im Bereich der Drosselklappe gemäß der technischen Lehre der DE 100 61 760 Cl als achteckigen Kanal auszuführen. Durch Veränderung der Eingangsimpedanz wird ein Teil der Energie der höheren Moden zurück in die Rohrleitung reflektiert und es verringern sich die dementsprechenden Schalldrücke. Die vorgenannten sowie die beanspruchten und in den Ausführungsbeispielen beschriebenen, erfindungsgemäß zu verwendenden Bauteile unterliegen in ihrer Größe, Formgestaltung, Materialauswahl und technischen Konzeption keinen besonderen Ausnahmebedingungen, so dass die in dem Anwendungsgebiet bekannten Auswahlkriterien uneingeschränkt Anwendung finden können.It is also possible to design the exhaust pipe in the area of the throttle valve in accordance with the technical teaching of DE 100 61 760 Cl as an octagonal channel. By changing the input impedance, part of the energy of the higher modes is reflected back into the pipeline and the corresponding sound pressure is reduced. The size, shape, material selection and technical conception of the above-mentioned components as well as those claimed and described in the exemplary embodiments, which are to be used according to the invention, are not subject to any special exceptional conditions, so that the selection criteria known in the field of application can be used without restriction.
Weitere Einzelheiten, Merkmale und Vorteile des Gegenstandes der Erfindung ergeben sich aus den Unteransprüchen sowie aus der nachfolgenden Beschreibung der zugehörigen Zeichnung, in der - beispielhaft - zwei bevorzugte Ausfuhrungsbeispiele des erfindungsgemäßen Sound-Designs dargestellt sind. In der Zeichnung zeigen:Further details, features and advantages of the subject matter of the invention result from the subclaims and from the following description of the associated drawing, in which - by way of example - two preferred exemplary embodiments of the sound design according to the invention are shown. The drawing shows:
Figur 1 eine schematische Darstellung der Steuerung des Sound-Designs in einerFigure 1 is a schematic representation of the control of the sound design in one
Auspuffrohrleitung mit einer angeflanschten Resonanzrohrleitung undExhaust pipe with a flanged resonance pipe and
Figur 2 eine Darstellung, in der die Auspuffrohrleitung segmentiert ist.Figure 2 is an illustration in which the exhaust pipe is segmented.
In der Figur 1 ist eine Auspuffrohrleitung 1 mit einem Flansch 2 und einer Resonanzrohrleitung 3 dargestellt. In der Auspuffrohrleitung 1 ist eine Drosselklappe 4 mit einem Antrieb 5 angeordnet. An der Auspuffrohrleitung 1 sind Sensoren 6a, 6b, 6c und 6d angeordnet, die mit einem Signalgenerator 8 und einer Steuereinheit 11 für den Antrieb 5 verbunden sind. Der Signalgenerator 8 ist außerdem mit einer Programmiereinheit 9 verbunden. Mit dem Signalgenerator 8 sind außerdem Motordatensensoren 7 (Drehzahl, Geschwindigkeit, Motorordnung etc.) verbunden sowie externe Sensoren 10 aus dem Fahrzeuginnenraum.1 shows an exhaust pipe 1 with a flange 2 and a resonance pipe 3. A throttle valve 4 with a drive 5 is arranged in the exhaust pipe 1. Sensors 6a, 6b, 6c and 6d are arranged on the exhaust pipe 1 and are connected to a signal generator 8 and a control unit 11 for the drive 5. The signal generator 8 is also connected to a programming unit 9. Engine data sensors 7 (speed, speed, engine order, etc.) are also connected to signal generator 8, as are external sensors 10 from the vehicle interior.
Aus der Figur 2 geht hervor, dass eine Auspuffrohrleitung 20 durch ein Blech 21 geteilt bzw. segmentiert wird. Die Iimenseite der Auspuffrohrleitung 20 und das Blech 21 sind mit einer absorbierenden Auskleidung versehen. An der Auspuffrohrleitung 20 sind Sensoren 23a, 23b, 23c, 23d, 23e und 23 f angeordnet. In den durch das Blech 21 in der Auspuffrohrleitung 20 gebildeten Segmenten sind jeweils eine Drosselklappe 24 und 25 mit einer Achse 26 und einem Antrieb 27a und einer Dämpfung 27b angeordnet. Der Antrieb 27a ist mit einer mehrkanaligen Steuereinheit 28 und einem Signalgenerator 29 verbunden. Der Signalgenerator 29 ist mit einer Programmiereinheit 31 verbunden. In den Signalgenerator 29 und in die melrrkanalige Steuereinheit 28 werden die Daten von externen Sensoren 30 und den Sensoren 23a bis 23f geführt. It can be seen from FIG. 2 that an exhaust pipe 20 is divided or segmented by a sheet 21. The inner side of the exhaust pipe 20 and the sheet 21 are provided with an absorbent lining. Sensors 23a, 23b, 23c, 23d, 23e and 23f are arranged on the exhaust pipe 20. In each of the segments formed by the sheet metal 21 in the exhaust pipe 20, a throttle valve 24 and 25 with an axis 26 and a drive 27a and a damping 27b are arranged. The drive 27a is connected to a multi-channel control unit 28 and a signal generator 29. The signal generator 29 is connected to a programming unit 31. In the signal generator 29 and the data from external sensors 30 and sensors 23a to 23f are fed into control channel 28.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Auspuffrohrleitung1 exhaust pipe
2 Flansch2 flange
3 Resonanzrohrleitung3 resonance pipeline
4 Drosselklappe4 throttle valve
5 Antrieb5 drive
6a Sensor6a sensor
6b Sensor6b sensor
6c Sensor6c sensor
6d Sensor6d sensor
7 Motordatensensoren7 engine data sensors
8 Signalgenerator8 signal generator
9 Programmiereinheit9 programming unit
10 Sensor Fahrzeuginnenraum10 Vehicle interior sensor
11 Steuereinheit11 control unit
20 Auspuffrohrleitung20 exhaust pipe
21 Blech21 sheet
22 absorbierende Auskleidung22 absorbent lining
23a Sensor23a sensor
23b Sensor23b sensor
23c Sensor23c sensor
23d Sensor23d sensor
23e Sensor23e sensor
23f Sensor23f sensor
24 Drosselklappe24 throttle valve
25 Drosselklappe25 throttle valve
26 Achse26 axis
27a Antrieb27a drive
27b Dämpfung27b damping
28 mehrkanalige Steuereinheit28 multi-channel control unit
29 Signalgenerator29 signal generator
30 externe Sensoren30 external sensors
31 Prograrnmiereinheit 31 programming unit

Claims

Patentansprüche claims
1. Verfahren zum Erzeugen eines Frequenzspektrums in einer Auspuffrolirleitung einer Hubkolbenmaschine, bei dem in der Auspuffrohrleitung eine als Durchflussmodulator fungierende Drosselklappe derart in Schwingungen versetzt wird, dass das Frequenzspektrum in dem Abgasstrom verändert wird, dadurch gekennzeichnet, dass über einen Signalgenerator der Antrieb der Drosselklappe gezielt derart gesteuert wird, dass die schwingende Drosselklappe das gewünschte Frequenzspektrum erzeugt.1. A method for generating a frequency spectrum in an exhaust pipe of a reciprocating machine, in which a throttle valve acting as a flow modulator is set in vibration in the exhaust pipe in such a way that the frequency spectrum in the exhaust gas flow is changed, characterized in that the drive of the throttle valve is targeted via a signal generator is controlled such that the oscillating throttle valve generates the desired frequency spectrum.
2. Verfahren nach Ansprach 1, dadurch gekennzeichnet, dass über einen Regellcreis das gewünschte Frequenzspektrum überwacht und geregelt wird.2. The method according spoke 1, characterized in that the desired frequency spectrum is monitored and regulated via a control circuit.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mit einer Programmiereinheit Signalmuster erzeugt werden.3. The method according to claim 1 or 2, characterized in that signal patterns are generated with a programming unit.
4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass die Längen der angeschlossenen Rohrleitungen derart dimensioniert werden, dass Resonanzen entstehen.4. The method according to claim 1 to 3, characterized in that the lengths of the connected pipes are dimensioned such that resonances arise.
5. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass an dem Antrieb (5) der Drosselklappe (4) ein Signalgenerator (8) angeordnet ist.5. A device for performing the method according to claim 1, characterized in that a signal generator (8) is arranged on the drive (5) of the throttle valve (4).
6. Vorrichtung nach Ansprach 5, dadurch gekennzeichnet, dass an dem Signalgenerator eine Programmiereinheit (9) vorgesehen ist.6. The device according spoke 5, characterized in that a programming unit (9) is provided on the signal generator.
7. Vorrichtung nach Anspruch 5 und 6, dadurch gekennzeichnet, dass die Auspuffrohrleitung (1) im Bereich der Drosselklappe (4) als achteckiger Kanal ausgebildet ist. 7. The device according to claim 5 and 6, characterized in that the exhaust pipe (1) in the region of the throttle valve (4) is designed as an octagonal channel.
EP03757989A 2002-10-17 2003-10-16 Method for producing a frequency spectrum in an exhaust pipe of an internal combustion piston engine Expired - Lifetime EP1982055B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10248607A DE10248607A1 (en) 2002-10-17 2002-10-17 Method for generating a frequency spectrum in an exhaust pipe of a reciprocating engine
PCT/EP2003/011462 WO2004036001A1 (en) 2002-10-17 2003-10-16 Method for producing a frequency spectrum in an exhaust pipe of an internal combustion piston engine

Publications (2)

Publication Number Publication Date
EP1982055A1 true EP1982055A1 (en) 2008-10-22
EP1982055B1 EP1982055B1 (en) 2009-07-22

Family

ID=32087003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03757989A Expired - Lifetime EP1982055B1 (en) 2002-10-17 2003-10-16 Method for producing a frequency spectrum in an exhaust pipe of an internal combustion piston engine

Country Status (4)

Country Link
EP (1) EP1982055B1 (en)
AT (1) ATE437296T1 (en)
DE (2) DE10248607A1 (en)
WO (1) WO2004036001A1 (en)

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US7155333B1 (en) * 2005-09-02 2006-12-26 Arvin Technologies, Inc. Method and apparatus for controlling sound of an engine by sound frequency analysis
JP4341608B2 (en) * 2005-11-01 2009-10-07 トヨタ自動車株式会社 Engine sound control device
WO2007103215A1 (en) * 2006-03-02 2007-09-13 Pacbrake Company High-performance muffler assembly with multiple modes of operation
DE102006034178A1 (en) * 2006-05-02 2007-11-08 Arvinmeritor Emissions Technologies Gmbh Device for influencing an exhaust gas flow
DE102006035297B4 (en) * 2006-07-31 2012-08-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Exhaust system of an internal combustion engine
JP2009108775A (en) * 2007-10-30 2009-05-21 Toyota Motor Corp Exhaust throttle valve opening control device for internal combustion engine
DE102012017902B4 (en) * 2012-09-11 2023-05-17 Christian Emile Marie Carme Device for influencing the exhaust noise of a motor vehicle
US8905187B2 (en) 2012-09-11 2014-12-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Device and method for manipulating the exhaust outlet noise of a motor vehicle
WO2017201576A1 (en) * 2016-05-27 2017-11-30 Ivex Pty Ltd Control system for a valve

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DE19911338A1 (en) * 1999-03-15 2000-09-21 Volkswagen Ag Internal combustion engine with an exhaust gas control device
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Title
See references of WO2004036001A1 *

Also Published As

Publication number Publication date
DE10248607A1 (en) 2004-05-06
ATE437296T1 (en) 2009-08-15
DE50311740D1 (en) 2009-09-03
WO2004036001A1 (en) 2004-04-29
EP1982055B1 (en) 2009-07-22

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