EP2227621A1 - Pot d'échappement - Google Patents

Pot d'échappement

Info

Publication number
EP2227621A1
EP2227621A1 EP09701195A EP09701195A EP2227621A1 EP 2227621 A1 EP2227621 A1 EP 2227621A1 EP 09701195 A EP09701195 A EP 09701195A EP 09701195 A EP09701195 A EP 09701195A EP 2227621 A1 EP2227621 A1 EP 2227621A1
Authority
EP
European Patent Office
Prior art keywords
housing
exhaust
silencer according
reactive part
absorbing
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.)
Withdrawn
Application number
EP09701195A
Other languages
German (de)
English (en)
Inventor
Leif Larson
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
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 Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP2227621A1 publication Critical patent/EP2227621A1/fr
Withdrawn legal-status Critical Current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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/0335—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with exhaust silencers in a single housing
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the gases or successively throttling gas flow
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/086—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling having means to impart whirling motion to the gases
    • F01N1/088—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling having means to impart whirling motion to the gases using vanes arranged on gas flow path or gas flow tubes with tangentially directed apertures
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to an exhaust silencer according to the preamble of Claim 1 , comprising a housing that is to be connected to an exhaust pipe, exhaust gases being arranged to be conveyed through the housing that comprises a reactive part and an absorbing part in the flow direction of the exhaust gases.
  • the purpose of the invention is to provide an improved solution to the above- mentioned problem that is related to the noise suppression of the exhaust gases of large combustion engines, in particular.
  • the purpose of the invention is to provide an exhaust silencer, which eliminates various fre- quencies of acoustic noise in a structurally advantageous manner and as effectively as possible.
  • a further purpose of the invention is to provide a silencer that is also capable of purifying the exhaust gases.
  • the reactive part of the silencer is mainly hollow and comprises, at its inlet, a first exhaust pipe for feeding the exhaust gases to the reactive part and, at its outlet, a second exhaust pipe for conducting the exhaust gases from the reactive part to the absorbing part, both exhaust pipes being arranged to essentially extend inside the reactive part of the housing.
  • the absorbing part comprises an absorbing filling element, which essentially fills the absorbing part of the housing and, at the inlet of the absorbing part, is formed so as to direct the exhaust gases to the space between the filling element and the inner lining of the housing.
  • the structure according to the invention can be used to effectively suppress the low, medium and high frequencies of the exhaust noise of the engine.
  • the solution is also advantageous regarding the total counterpressure caused by the exhaust system.
  • the said first and second exhaust pipes are preferably dimensioned so that they suppress the lowest frequencies of the exhaust noise by utilizing the mutual suppressive interference of sonic waves.
  • the mouths of the said first and second exhaust pipes that are situated opposite each other are also arranged at a distance from each other.
  • the said first exhaust pipe extends inside the reactive part for about one fourth of the total length of the reactive part.
  • the said second exhaust pipe extends inside the reactive part for about a half of the total length of the reactive part.
  • spark quenching means By arranging spark quenching means between the reactive part and the absorbing part, the soot particles in the exhaust gases can effectively be separated be- fore the exhaust gases are released into the environment. In that case, besides purifying the exhaust gases as such, the purpose is also to prevent sparks from escaping out of the exhaust pipe and from possibly causing fire safety risks.
  • the spark quenching means preferably comprise a number of radially extending plate elements, which are formed so as to direct the exhaust gas flow into a rotating movement around the filling element of the absorbing part.
  • the soot particles can effectively be directed onto the inner lining of the housing under the effect of centrifugal force.
  • a soot trap door in the longitudinal direction of the housing, the soot particles can then be recovered and, where necessary, easily removed from the housing.
  • the space between the housing and the filling element can be rendered relatively small compared to the diameter of the filling element.
  • the total cross-sectional area of the space can be kept large enough, so that the ar- rangement does not increase the counterpressure of the exhaust silencer to a considerable extent.
  • the arrangement for its part, also improves the suppression of medium and high-frequency noise.
  • the filling element on the side of the re- active part is preferably sharp-pointed, and most preferably conical.
  • the filling element preferably mainly consists of mineral wool, which is arranged inside a perforated plate, net or the like that is supported on the housing.
  • the housing is preferably situated in the vertical direction, so that the exhaust gases are fed into the housing from below.
  • Fig. 1 shows an embodiment of the exhaust silencer according to the invention as a longitudinal section
  • FIG. 2 shows an axonometric illustration of the silencer of Fig. 1 , with the housing of the silencer cut open and the absorbing material removed.
  • the reference number 1 refers to the housing of the exhaust silencer, which is attached to the exhaust pipe of a combustion engine to direct the exhaust gases through the silencer.
  • the housing 1 comprises a reactive part 2 and an absorbing part 3, which are arranged sequentially in the flow direction. Between these, there are the spark quenching means 4.
  • the reactive part 2 is intended for suppressing low noises and it includes a first exhaust pipe 5, through which the exhaust gases are fed into the housing 1 , and a second exhaust pipe 6, which is arranged at a distance from the first exhaust pipe 5 and through which the exhaust gases are directed, through the spark quenching means 4, to the absorbing part 3, wherein the suppression of medium and high-frequency exhaust noise, in turn, is provided before the ex- haust gases are directed out of the silencer and into the environment.
  • the first exhaust pipe 5 extends inside the reactive part 2 for about one fourth of the total length of the reactive part 2.
  • the second exhaust pipe 6 extends inside the reactive part 2 for about a half of the total length of the reactive part 2.
  • the dimensioning should also take into consideration the sparking frequency of the combustion engine and the diameters of the silencer and the exhaust pipe of the engine, as well as the respective requirements made of noise suppression.
  • the absorbing part 3 contains a filling element 7, which preferably consists of mineral wool and is surrounded by a perforated plate material, wire mesh or the like, which is supported on the housing 1.
  • the filling element 7 is rendered conical, so that the exhaust gases are directed to the space 8 between the inner lining of the housing 1 and the filling element 7 to be further conducted outside.
  • the spark quenching means 4 include a number of radially extending plate elements 9, which are shaped so as to direct the exhaust gas flow into a rotating movement around the filling element 7 of the absorbing part.
  • the rotating movement thus provided is tailor-made to direct the soot particles, which are heavier than the exhaust gases, towards the inner lining of the housing 1 , where they can be easily recovered and removed from the housing through a longitu- dinal soot trap door 10.
  • the exhaust silencer according to the invention preferably has a rotationally symmetrical structure, and it can preferably be situated in the vertical direction, in so far as the application so requires. In this position, the soot door is also easy to open and empty.
  • the structure of the exhaust silencer according to the invention is advantageous regarding the total counterpressure inflicted on the exhaust system. Furthermore, the spark quenching means can easily be integrated into it, directing, for their part, the exhaust gases radially outwards towards the inner lining of the housing.

Landscapes

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

Abstract

L'invention concerne un pot d'échappement de moteur à combustion, qui comprend un corps (1) devant être relié à un tuyau d'échappement par lequel sont dirigés les gaz d'échappement, ledit corps comprenant une partie réactive (2) et une partie d'absorption (3) dans le sens d'écoulement des gaz d'échappement. La partie réactive (2) est principalement creuse et comprend, à son orifice d'entrée, un premier tuyau d'échappement (5) qui amène les gaz d'échappement vers la partie réactive (2), et, à son orifice de sortie, un second tuyau d'échappement (6) qui dirige les gaz d'échappement provenant de la partie réactive (2) vers la partie d'absorption (3), ces deux tuyaux d'échappement (5, 6) étant placés de manière à se déployer essentiellement à l'intérieur de la partie réactive (2) du corps. La partie d'absorption (3) comprend un élément de remplissage (7) absorbant qui remplit essentiellement la partie d'absorption (3) du corps, et est façonnée, à l'orifice d'entrée de la partie d'absorption (3), de manière à diriger les gaz d'échappement vers l'espace (8) compris entre l'élément de remplissage (7) et la garniture intérieure du corps (1).
EP09701195A 2008-01-09 2009-01-02 Pot d'échappement Withdrawn EP2227621A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20085013A FI124220B (fi) 2008-01-09 2008-01-09 Pakokaasuäänenvaimennin
PCT/FI2009/050003 WO2009087270A1 (fr) 2008-01-09 2009-01-02 Pot d'échappement

Publications (1)

Publication Number Publication Date
EP2227621A1 true EP2227621A1 (fr) 2010-09-15

Family

ID=39004313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09701195A Withdrawn EP2227621A1 (fr) 2008-01-09 2009-01-02 Pot d'échappement

Country Status (5)

Country Link
EP (1) EP2227621A1 (fr)
KR (1) KR101483985B1 (fr)
CN (1) CN101918685B (fr)
FI (1) FI124220B (fr)
WO (1) WO2009087270A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200468563Y1 (ko) * 2010-11-03 2013-08-27 대우조선해양 주식회사 선박용 소음저감장치
KR200465750Y1 (ko) * 2011-01-27 2013-03-11 희성촉매 주식회사 Ｄｐｆ가 적용된 집진장치
CN102619591A (zh) * 2012-01-06 2012-08-01 内蒙古农业大学 用于内燃机排气消声器中的气流反相对冲消声单元
US9121319B2 (en) 2012-10-16 2015-09-01 Universal Acoustic & Emission Technologies Low pressure drop, high efficiency spark or particulate arresting devices and methods of use
CN103089373A (zh) * 2013-01-23 2013-05-08 张晓荣 一种兼具火星熄灭功能的消声装置
CN103423127A (zh) * 2013-08-20 2013-12-04 周挺 一种方便型消声装置
CN112177711A (zh) * 2020-09-22 2021-01-05 徐工集团工程机械股份有限公司道路机械分公司 一种消声过滤器及尾气排放装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347754Y2 (fr) * 1975-04-15 1978-11-15
FR2345586A1 (fr) * 1976-03-24 1977-10-21 Nihon Radiator Co Pot d'echappement
US4192402A (en) * 1977-05-27 1980-03-11 Honda Giken Kogyo Kabushiki Kaisha Muffler for internal combustion engines
US4162904A (en) * 1978-04-10 1979-07-31 American Air Filter Company, Inc. Silencer-separator device
WO1997005368A1 (fr) * 1995-06-30 1997-02-13 Antoine Poppe Filtre pour gaz d'echappement de moteur a essence ou de moteur diesel
DK200300343A (da) * 2003-03-05 2004-09-06 Chris Invest As An exhaust system component for a combustion engine exhaust system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009087270A1 *

Also Published As

Publication number Publication date
CN101918685B (zh) 2012-11-21
FI20085013A (fi) 2009-07-10
CN101918685A (zh) 2010-12-15
FI124220B (fi) 2014-05-15
KR20100097728A (ko) 2010-09-03
WO2009087270A1 (fr) 2009-07-16
KR101483985B1 (ko) 2015-01-19
FI20085013A0 (fi) 2008-01-09

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