EP1982055B1 - 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 Download PDF

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Publication number
EP1982055B1
EP1982055B1 EP03757989A EP03757989A EP1982055B1 EP 1982055 B1 EP1982055 B1 EP 1982055B1 EP 03757989 A EP03757989 A EP 03757989A EP 03757989 A EP03757989 A EP 03757989A EP 1982055 B1 EP1982055 B1 EP 1982055B1
Authority
EP
European Patent Office
Prior art keywords
throttle valve
exhaust pipe
frequency spectrum
signal generator
frequencies
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.)
Expired - Lifetime
Application number
EP03757989A
Other languages
German (de)
French (fr)
Other versions
EP1982055A1 (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

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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 engine according to the preamble of claim 1 and a device suitable therefor.
  • EP 0 649 494 B1 is intended to achieve a reduction in the sound level or a change in timbre by damping with the arranged in the exhaust pipe as a flow modulator acting throttle.
  • the vibration of the throttle only serves to calm the flow.
  • a change of timbre is possible only to a very limited extent.
  • An increase in roughness, 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 available, in which by additional sound generation a frequency spectrum in the sense of a sound design is generated. 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 generates the desired frequency spectrum.
  • noise or pressure pulsations and modulations can be additionally generated and superimposed on the flow in the exhaust pipe.
  • signal patterns that are unrelated to the motor or the flow can be generated and superimposed via a programming unit.
  • the throttle valve is used not only for damping, but also for generating sound or the generation of additional pressure fluctuations.
  • FIG. 1 an exhaust pipe 1 with a flange 2 and a resonance pipe 3 is shown.
  • a throttle valve 4 is arranged with a drive 5.
  • sensors 6a, 6b, 6c and 6d are arranged, which 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. With the signal generator 8 also motor data sensors 7 (speed, speed, engine order, etc.) are connected and external sensors 10 from the vehicle interior.
  • an exhaust pipe 20 is divided by a sheet 21 or segmented.
  • the inside 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 the segments formed by the sheet 21 in the exhaust pipe 20 each have a throttle valve 24 and 25 are arranged with an axis 26 and a drive 27a and a damping 27b.
  • 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 in the multi-channel control unit 28, the data is fed from external sensors 30 and the sensors 23a to 23f.

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

Die Erfindung betrifft ein Verfahren zum Erzeugen eines Frequenzspektrums in einer Auspuffrohrleitung 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 engine according to the preamble of claim 1 and a device suitable therefor.

Aus der EP 0 649 494 B1 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 the EP 0 649 494 B1 It is known to change the sound level or the tone color which is produced by the exhaust gas flow by means of a throttle valve acting as a flow modulator in the exhaust pipe. It is also proposed to change the timbre of the exhaust pipe by damping a preferred frequency range. So should be achieved that the exhaust system either sounds of sporty sound or more muffled sounds radiated.

Gemäß der technischen Lehre der EP 0 649 494 B1 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.According to the technical teaching of EP 0 649 494 B1 is intended to achieve a reduction in the sound level or a change in timbre by damping with the arranged in the exhaust pipe as a flow modulator acting throttle. The vibration of the throttle only serves to calm the flow. Thus, a change of timbre is possible only to a very limited extent. An increase in roughness, synonymous with a sportier sound, is not possible.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Erzeugen eines Frequenz- , spektrums in einer Auspuffrohrleitung einer Hubkolbenmaschine zur Verfügung zu stellen, bei dem durch zusätzliche Schallerzeugung ein Frequenzspektrum im Sinne eines Sound-designs erzeugt wird. Eine weitere Aufgabe der Erfindung liegt darin, für das Sounddesign geeignete Vorrichtungen zur Verfügung zu stellen.The invention has for its object to provide a method for generating a frequency spectrum in an exhaust pipe of a reciprocating engine available, in which by additional sound generation a frequency spectrum in the sense of a sound design is generated. 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 solved by the characterizing features of claim 1.

Weiterbildungen erfolgen gemäß den Merkmalen der Unteransprüche.Further developments take place according to the features 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 generates the desired frequency spectrum. In this way, noise or pressure pulsations and modulations can be additionally 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, signal patterns that are unrelated to the motor or the flow can be generated and superimposed via a programming unit.

Erfindungsgemäß wird die Drosselklappe nicht nur zur Bedämpfung, sondern auch zur Schallgenerierung bzw. der Erzeugung von zusätzlichen Druckfluktuationen benutzt.According to the throttle valve is used not only for damping, but also for generating sound 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 a suitable dimensioning of the connected pipelines, these can be purposefully resonated or used as a resonant body for intentional 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.By the invention it is possible to make a sound design in the exhaust stream of a reciprocating engine, which are to be understood by reciprocating engines primarily combustion engines such as gasoline and diesel engines.

Es ist auch möglich, die Auspuf&ohrleitung im Bereich der Drosselklappe gemäß der technischen Lehre der DE 100 61 760 C1 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.It is also possible, the exhaust pipe in the throttle valve according to the technical teaching of DE 100 61 760 C1 as an octagonal channel. By changing the input impedance, part of the energy of the higher modes is reflected back into the pipe and the corresponding sound pressure decreases.

Die vorgenannten sowie die beanspruchten und in den Ausführungsbeispieien 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.The aforementioned and the claimed and described in the Ausführungsbeispieien, according to the invention to be used components are subject to their size, shape design, choice of materials and technical design no special conditions of exception, so that the well-known in the field of application selection criteria can apply 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 Ausführungsbeispiele des erfindungsgemäßen Sound-Designs dargestellt sind. In der Zeichnung zeigen:

Figur 1
eine schematische Darstellung der Steuerung des Sound-Designs in einer Auspuffrohrleitung mit einer angeflanschten Resonanzrohrleitung und
Figur 2
eine Darstellung, in der die Auspuffrohrleitung segmentiert ist.
Further details, features and advantages of the subject matter of the invention will become apparent from the dependent claims and from the following description of the accompanying drawings, in which - by way of example - two preferred embodiments of the sound design according to the invention are shown. In the drawing show:
FIG. 1
a schematic representation of the control of the sound design in an exhaust pipe with a flanged resonance pipe and
FIG. 2
a representation 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.In the FIG. 1 an exhaust pipe 1 with a flange 2 and a resonance pipe 3 is shown. In the exhaust pipe 1, a throttle valve 4 is arranged with a drive 5. On the exhaust pipe 1 sensors 6a, 6b, 6c and 6d are arranged, which 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. With the signal generator 8 also motor data sensors 7 (speed, speed, engine order, etc.) are connected and 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 Innenseite 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 23f 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 mehrkanalige Steuereinheit 28 werden die Daten von externen Sensoren 30 und den Sensoren 23a bis 23f geführt.From the FIG. 2 It is apparent that an exhaust pipe 20 is divided by a sheet 21 or segmented. The inside of the exhaust pipe 20 and the sheet 21 are provided with an absorbent lining. On the exhaust pipe 20 sensors 23a, 23b, 23c, 23d, 23e and 23f are arranged. In the segments formed by the sheet 21 in the exhaust pipe 20 each have a throttle valve 24 and 25 are arranged with an axis 26 and a drive 27a and a damping 27b. 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 in the multi-channel control unit 28, the data is fed from external sensors 30 and the sensors 23a to 23f.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
AuspuffrohrleitungExhaust Pipe
22
Flanschflange
33
ResonanzrohrleitungResonance pipe
44
Drosselklappethrottle
55
Antriebdrive
6a6a
Sensorsensor
6b6b
Sensorsensor
6c6c
Sensorsensor
6d6d
Sensorsensor
77
MotordatensensorenEngine Data Sensors
88th
Signalgeneratorsignal generator
99
Programmiereinheitprogramming unit
1010
Sensor FahrzeuginnenraumSensor vehicle interior
1111
Steuereinheitcontrol unit
2020
AuspuffrohrleitungExhaust Pipe
2121
BleichPale
2222
absorbierende Auskleidungabsorbent lining
23a23a
Sensorsensor
23b23b
Sensorsensor
23c23c
Sensorsensor
23d23d
Sensorsensor
23e23e
Sensorsensor
23f23f
Sensorsensor
2424
Drosselklappethrottle
2525
Drosselklappethrottle
2626
Achseaxis
27a27a
Antriebdrive
27b27b
Dämpfungdamping
2828
mehrkanalige Steuereinheitmulti-channel control unit
2929
Signalgeneratorsignal generator
3030
externe Sensorenexternal sensors
3131
Programmiereinheitprogramming unit

Claims (7)

  1. Method for generating a range of frequencies in an exhaust conduit from a reciprocating engine whereby a throttle valve operating as a flow modulator in the exhaust conduit is made to oscillate in such a manner that the range of frequencies in the exhaust gas flow is changed, characterised in that a signal generator actuates specifically the throttle valve's drive in such a manner that the oscillating throttle valve generates additional sound for the desired range of frequencies.
  2. Method according to Claim 1, characterised in that a control loop is used to monitor and regulate the range of frequencies.
  3. Method according to Claim 1 or 2, characterised in that signal patterns are generated with a programming unit.
  4. Method according to Claims 1 to 3, characterised in that the lengths of the connected conduits are such that they give rise to resonances.
  5. Device for implementing the method according to Claim 1, characterised in that a signal generator (8) for generating additional sound is arranged at the drive (5) for the throttle valve (4).
  6. Device according to Claim 5, characterised in that the signal generator is fitted with a facility for a programming unit (9).
  7. Device according to Claims 5 and 6, characterised in that the exhaust conduit (1) is designed with eight sides at the throttle valve (4).
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 EP1982055A1 (en) 2008-10-22
EP1982055B1 true 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017902A1 (en) 2012-09-11 2014-03-13 Dr. Ing. H.C. F. Porsche Ag Device for influencing exhaust gas opening noise of motor car, has exhaust valve displaced around exhaust flap base position in angular range actively adjustable according to frequency of exhaust gas opening noise to be amplified
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

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Publication number Priority date Publication date Assignee Title
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
WO2017201576A1 (en) * 2016-05-27 2017-11-30 Ivex Pty Ltd Control system for a valve

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Publication number Priority date Publication date Assignee Title
FR2613089B1 (en) * 1987-03-24 1993-09-03 Centre Nat Rech Scient METHOD AND DEVICE FOR REDUCING FLOW FLUCTUATIONS OF A FLUID FLOW IN A PIPELINE
FR2693505B1 (en) * 1992-07-07 1994-09-09 Centre Ntl Recherche Scient Inlet or exhaust line for alternative machine.
DE4416739C2 (en) * 1994-05-12 1999-06-17 Alpha Technik Gmbh Device for reducing noise in internal combustion engines
DE4439705A1 (en) * 1994-11-05 1996-05-09 Gillet Heinrich Gmbh Pressure pulsation reduction system for automobile exhaust pipe
DE19911338A1 (en) * 1999-03-15 2000-09-21 Volkswagen Ag Internal combustion engine with an exhaust gas control device
DE10055399A1 (en) * 1999-11-20 2001-05-23 Mann & Hummel Filter Controlling sound in air inlet manifold of engine, employs valve closing at least partially, at given periodic intervals when little or no air is transferred

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017902A1 (en) 2012-09-11 2014-03-13 Dr. Ing. H.C. F. Porsche Ag Device for influencing exhaust gas opening noise of motor car, has exhaust valve displaced around exhaust flap base position in angular range actively adjustable according to frequency of exhaust gas opening noise to be amplified
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
DE102012017902B4 (en) 2012-09-11 2023-05-17 Christian Emile Marie Carme Device for influencing the exhaust noise of a motor vehicle

Also Published As

Publication number Publication date
DE10248607A1 (en) 2004-05-06
ATE437296T1 (en) 2009-08-15
EP1982055A1 (en) 2008-10-22
DE50311740D1 (en) 2009-09-03
WO2004036001A1 (en) 2004-04-29

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