EP0163024A1 - Silencieux d'échappement à réflexion - Google Patents

Silencieux d'échappement à réflexion Download PDF

Info

Publication number
EP0163024A1
EP0163024A1 EP85102989A EP85102989A EP0163024A1 EP 0163024 A1 EP0163024 A1 EP 0163024A1 EP 85102989 A EP85102989 A EP 85102989A EP 85102989 A EP85102989 A EP 85102989A EP 0163024 A1 EP0163024 A1 EP 0163024A1
Authority
EP
European Patent Office
Prior art keywords
exhaust
reflection
silencer
pipe
opening
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
EP85102989A
Other languages
German (de)
English (en)
Other versions
EP0163024B1 (fr
Inventor
Alfons Zachmann
Hermann Ermer
Franz Lüftenegger
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.)
Leistritz AG
Original Assignee
Leistritz AG
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 Leistritz AG filed Critical Leistritz AG
Priority to AT85102989T priority Critical patent/ATE38410T1/de
Publication of EP0163024A1 publication Critical patent/EP0163024A1/fr
Application granted granted Critical
Publication of EP0163024B1 publication Critical patent/EP0163024B1/fr
Expired legal-status Critical Current

Links

Images

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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction

Definitions

  • the invention relates to a reflection exhaust silencer, in particular for internal combustion engines in motor vehicles, with exhaust pipes passing through the muffler chambers.
  • the invention is therefore based on the object of providing a reflection-type exhaust silencer in which, by means of suitable constructional measures, such frequency levels which are in the pass band of the individual chambers are sufficiently attenuated.
  • the design according to the invention is intended to produce a kind of Helmholtz resonator, which is tuned in such a way that selective frequency cancellation takes place.
  • the exhaust pipe has at least one lateral opening that is arched over by a sheet metal and that only leaves axial coupling openings free. Due to this relatively large lateral opening, practically no exhaust gas reaches the corresponding chamber directly because of the relatively closely adjacent sheet metal, which also extends axially over the opening edges, but instead only an acoustic coupling takes place through this construction, which is matched in the manner of Helmholtz resonators that a desired frequency range is particularly strongly damped selectively.
  • a blind-ended pipe attachment can be coupled to the outlet-side end of an exhaust pipe, the length of which is an odd multiple of a quarter of the mean sound wavelength to be canceled.
  • the blind end is preferably funnel-shaped or roof-shaped to achieve a favorable sound deflection - there are shifts between the incoming sound wave and the reflected sound wave at the beginning of the tube by odd multiples of half a wavelength, so that the incoming and the superimpose reflected wave in the sense of cancellation.
  • the pipe neck on the exhaust pipe can be a blind piece of the same diameter, a blind piece reduced in diameter by forming or attached by welding.
  • the design assumes that the exhaust pipe is provided with side openings for the gas outlet before the start of the blind piece.
  • the pipe extension is arranged at a distance from the exhaust gas outlet end opening of the coaxial exhaust pipe and is therefore essentially only acoustically coupled to it.
  • the first resonator comprises an opening 9 of the inlet exhaust pipe 6 for the first silencer chamber I, which is arched over by a sheet 10.
  • This sheet 10 is connected along the axial side edges 11 to the exhaust pipe 6, so that only crescent-shaped front opening 12 to muffler chamber I exist.
  • the length of the sheet 10 and its distance and thus also the size of the end openings 12 are chosen so that essentially no exhaust gas outlet through these openings into the silencer chamber I, but that a resonator is formed on the other side, which has a certain predeterminable Selectively damped sound frequency range.
  • the embodiment according to FIG. 3 differs from the embodiment according to FIG. 2 in that the tube extension 13 is not welded directly to the end of the exhaust pipe 6, which of course requires lateral gas outlet openings 16 in the embodiment according to FIGS. 1 and 2. Instead, the exhaust pipe 6 is provided with a front outlet opening 17, which is coaxially opposite the inlet opening 15 of the pipe extension 13. In this embodiment, two partitions 3a and 3b are provided in order to deflect the exhaust gas into the front region of the muffler chamber I.
  • the Helmholtz resonator-type sound attenuation device is again by a Aisle-side opening 9 of the exhaust pipe and a sheet 10 arching over it are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP85102989A 1984-05-09 1985-03-15 Silencieux d'échappement à réflexion Expired EP0163024B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102989T ATE38410T1 (de) 1984-05-09 1985-03-15 Reflexions-abgasschalldaempfer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843417131 DE3417131A1 (de) 1984-05-09 1984-05-09 Reflexions-abgasschalldaempfer
DE3417131 1984-05-09

Publications (2)

Publication Number Publication Date
EP0163024A1 true EP0163024A1 (fr) 1985-12-04
EP0163024B1 EP0163024B1 (fr) 1988-11-02

Family

ID=6235342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102989A Expired EP0163024B1 (fr) 1984-05-09 1985-03-15 Silencieux d'échappement à réflexion

Country Status (3)

Country Link
EP (1) EP0163024B1 (fr)
AT (1) ATE38410T1 (fr)
DE (1) DE3417131A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802308A1 (fr) * 1996-04-18 1997-10-22 HEINRICH GILLET GMBH & CO. KG Silencieux

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101283242B1 (ko) 2010-10-08 2013-07-11 현대자동차주식회사 차량용 소음기
DE102015118573A1 (de) * 2015-10-30 2017-05-04 Eberspächer Exhaust Technology GmbH & Co. KG Schalldämpfer für eine Abgasanlage einer Brennkraftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1074562A (en) * 1963-06-25 1967-07-05 Walker Mfg Co Silencers for gases
US3402785A (en) * 1965-10-23 1968-09-24 Walker Mfg Co Muffler with resonance chambers for high and low frequencies
FR2283312A1 (fr) * 1974-08-28 1976-03-26 Yamaha Motor Co Ltd Appareil et dispositif d'amortissement des bruits, notamment a l'echappement des moteurs a combustion interne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949974C (de) * 1953-04-14 1956-09-27 Friedrich Boysen Schalldaempfer fuer pulsierende Stroemungen, insbesondere fuer den Auspuff von Kraftfahrzeug-Brennkraftmaschinen
US2922485A (en) * 1955-09-19 1960-01-26 Gen Motors Corp Muffler
DE1787803U (de) * 1959-01-29 1959-04-30 Schuenemann & Co Rohrfoermiger schalldaempfer.
DE2856889A1 (de) * 1978-12-30 1980-11-20 Zeuna Staerker Kg Schalldaempfer in der abgasleitung eines verbrennungsmotors, insbesondere an einem kraftfahrzeug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1074562A (en) * 1963-06-25 1967-07-05 Walker Mfg Co Silencers for gases
US3402785A (en) * 1965-10-23 1968-09-24 Walker Mfg Co Muffler with resonance chambers for high and low frequencies
FR2283312A1 (fr) * 1974-08-28 1976-03-26 Yamaha Motor Co Ltd Appareil et dispositif d'amortissement des bruits, notamment a l'echappement des moteurs a combustion interne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802308A1 (fr) * 1996-04-18 1997-10-22 HEINRICH GILLET GMBH & CO. KG Silencieux

Also Published As

Publication number Publication date
EP0163024B1 (fr) 1988-11-02
DE3417131A1 (de) 1985-11-21
ATE38410T1 (de) 1988-11-15
DE3417131C2 (fr) 1988-11-24

Similar Documents

Publication Publication Date Title
DE102009000645B3 (de) Schalldämpfer mit mindestens einem mittels helikaler Einbauten aufgebauten Helmholtz-Resonator
EP1959106B2 (fr) Silencieux pour un système d'échappement
EP0506686A1 (fr) Conduite de gaz d'echappement avec un support de catalyseur recevant un ecoulement helicoidal.
EP0713046B1 (fr) Dispositif de silencieux pour tuyaux
DE2908506C2 (de) Schalldämpfer für Verbrennungskraftmaschinen
DE19743446C2 (de) Abgasanlage für eine Brennkraftmaschine
DE2706957C2 (de) Abgasschalldämpfer
EP0274659B1 (fr) Silencieux à absorption/réflexion
DE2206875A1 (de) Schalldaempfer
EP0455622B1 (fr) Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne à deux temps
EP0163024B1 (fr) Silencieux d'échappement à réflexion
DE7307335U (de) Abgasschalldaempfer fuer zweitakt- motore
DE2816159C2 (de) Reflexions-Schalldämpfer für Brennkraftmaschinen
DE2714100A1 (de) Luftansaugrohr fuer eine brennkraftmaschine
EP1798390B1 (fr) Système d'échappement pour moteurs à combustion interne
DE6608356U (de) Abgasanlage mit schalldaempfer.
DE1426198A1 (de) Schalldaempfer
DE2257852C2 (de) Abgasschalldämpfer für mehrzylindrige Brennkraftmaschinen
DE964915C (de) Schalldaempfer fuer Brennkraftmaschinen
DE10103739B4 (de) Schalldämpfer
DE1576754A1 (de) Abgasschalldaempfer,insbesondere fuer Kreiskolbenmotoren
DE2711191C2 (de) Abgasschalldämpfer
DE19948146A1 (de) Abgasschalldämpfer
EP0705961B1 (fr) Silencieux de gaz d'échappement
DE2741716C2 (de) Absorptions-Nachschalldämpfer für Brennkraftmaschinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE FR

17P Request for examination filed

Effective date: 19860104

17Q First examination report despatched

Effective date: 19860731

D17Q First examination report despatched (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LEISTRITZ AKTIENGESELLSCHAFT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE FR

REF Corresponds to:

Ref document number: 38410

Country of ref document: AT

Date of ref document: 19881115

Kind code of ref document: T

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19890116

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19890127

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19890131

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19900315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19900331

BERE Be: lapsed

Owner name: LEISTRITZ A.G.

Effective date: 19900331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19901130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST