EP1318281A3 - Active silencer for exhaust systems - Google Patents

Active silencer for exhaust systems Download PDF

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Publication number
EP1318281A3
EP1318281A3 EP02018051A EP02018051A EP1318281A3 EP 1318281 A3 EP1318281 A3 EP 1318281A3 EP 02018051 A EP02018051 A EP 02018051A EP 02018051 A EP02018051 A EP 02018051A EP 1318281 A3 EP1318281 A3 EP 1318281A3
Authority
EP
European Patent Office
Prior art keywords
silencer
movable wall
active silencer
exhaust systems
piston
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
EP02018051A
Other languages
German (de)
French (fr)
Other versions
EP1318281A2 (en
EP1318281B1 (en
Inventor
Jan Dr. Krüger
Thomas Rose
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 Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1318281A2 publication Critical patent/EP1318281A2/en
Publication of EP1318281A3 publication Critical patent/EP1318281A3/en
Application granted granted Critical
Publication of EP1318281B1 publication Critical patent/EP1318281B1/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
    • F01N1/06—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

Die vorliegende Erfindung betrifft einen aktiven Schalldämpfer (1) zum Dämpfen von Luftschall, den eine Maschine (3) mit einer rotierenden Antriebswelle (11) in Abhängigkeit ihrer Drehzahl erzeugt. Der Schalldämpfer (1) weist einen Hohlkörper (4) auf, der eine bewegliche Wand (7) zur Erzeugung von Gegenschall enthält und über eine Verbindung (8) mit einer zur Führung des zu dämpfenden Luftschalls geeigneten Leitung (9) akustisch gekoppelt ist. Der Schalldämpfer (1) besitzt außerdem eine Antriebseinrichtung (10) zum Bewegeri der beweglichen Wand (7).The present invention relates to an active silencer (1) for damping airborne sound that a machine (3) with a rotating drive shaft (11) depending on its Speed generated. The silencer (1) has one Hollow body (4) on which a movable wall (7) for generation contains counter-sound and via a connection (8) with a suitable for guiding the airborne sound to be damped Line (9) is acoustically coupled. The silencer (1) also has a drive device (10) for moving the movable wall (7).

Einen besonders robusten Aufbau erhält der Schalldämpfer (1) dadurch, daß die bewegliche Wand durch einen Boden (7) eines Kolbens (5) gebildet ist, wobei der Hohlkörper durch einen Zylinderraum (4) gebildet ist, in dem der Kolben (5) hubverstellbar angeordnet ist.

Figure 00000001
The silencer (1) is particularly robust in that the movable wall is formed by a base (7) of a piston (5), the hollow body being formed by a cylinder space (4) in which the piston (5) can be adjusted in stroke is arranged.
Figure 00000001
EP20020018051 2001-12-04 2002-08-13 Active silencer for exhaust systems Expired - Lifetime EP1318281B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001159487 DE10159487C1 (en) 2001-12-04 2001-12-04 Active sound damping device for automobile engine exhaust has counter sound generated by reciprocation of piston at constant ratio to engine revs
DE10159487 2001-12-04

Publications (3)

Publication Number Publication Date
EP1318281A2 EP1318281A2 (en) 2003-06-11
EP1318281A3 true EP1318281A3 (en) 2004-01-07
EP1318281B1 EP1318281B1 (en) 2005-08-31

Family

ID=7707965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020018051 Expired - Lifetime EP1318281B1 (en) 2001-12-04 2002-08-13 Active silencer for exhaust systems

Country Status (2)

Country Link
EP (1) EP1318281B1 (en)
DE (2) DE10159487C1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005011747B3 (en) * 2005-03-11 2006-06-29 Benteler Automobiltechnik Gmbh Active exhaust gas silencer for motor vehicle has membrane set in flexural oscillations by excitation by converter so that on surface facing exhaust gas flow structure-borne noise tuned to exhaust gas noise is created
DE102005019459B3 (en) * 2005-04-25 2006-07-13 Benteler Automobiltechnik Gmbh Active sound insulator for air intake channel of internal combustion engine equipped with sensor has heat- and damp-proof membrane connected to intake air flow whose surface is moved by sensor-linked converter in bending vibrations

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU850875A1 (en) * 1979-10-01 1981-07-30 За витель Device for reducing noise in air duct
JPH05231122A (en) * 1992-02-26 1993-09-07 Hitachi Zosen Corp Sound pressure generator for suppressing noise in duct
EP0916817A2 (en) * 1997-11-18 1999-05-19 LEISTRITZ AG & CO. Abgastechnik Active silencer
JP2000130145A (en) * 1998-10-29 2000-05-09 Osaka Gas Co Ltd Active silencing device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5319165A (en) 1990-04-25 1994-06-07 Ford Motor Company Dual bandpass secondary source
GB2253076B (en) * 1991-02-21 1994-08-03 Lotus Car Method and apparatus for attenuating acoustic vibrations in a medium
US5336856A (en) 1992-07-07 1994-08-09 Arvin Industries, Inc. Electronic muffler assembly with exhaust bypass
JPH08246969A (en) 1995-03-15 1996-09-24 Unisia Jecs Corp Active noise control device for automobile
DE19751596A1 (en) * 1997-11-21 1999-06-02 Leistritz Abgastech Active noise damper for automobile exhaust

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU850875A1 (en) * 1979-10-01 1981-07-30 За витель Device for reducing noise in air duct
JPH05231122A (en) * 1992-02-26 1993-09-07 Hitachi Zosen Corp Sound pressure generator for suppressing noise in duct
EP0916817A2 (en) * 1997-11-18 1999-05-19 LEISTRITZ AG & CO. Abgastechnik Active silencer
JP2000130145A (en) * 1998-10-29 2000-05-09 Osaka Gas Co Ltd Active silencing device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198220, Derwent World Patents Index; AN 1982-F9196E, XP002260611 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 686 (M - 1529) 15 December 1993 (1993-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 08 6 October 2000 (2000-10-06) *

Also Published As

Publication number Publication date
DE50204073D1 (en) 2005-10-06
EP1318281A2 (en) 2003-06-11
DE10159487C1 (en) 2003-02-20
EP1318281B1 (en) 2005-08-31

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