US20040149515A1 - Muffler - Google Patents

Muffler Download PDF

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Publication number
US20040149515A1
US20040149515A1 US10/760,346 US76034604A US2004149515A1 US 20040149515 A1 US20040149515 A1 US 20040149515A1 US 76034604 A US76034604 A US 76034604A US 2004149515 A1 US2004149515 A1 US 2004149515A1
Authority
US
United States
Prior art keywords
sound
gas
muffler
tube
moisture
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.)
Abandoned
Application number
US10/760,346
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English (en)
Inventor
Youhei Toyoshima
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.)
Marelli Corp
Original Assignee
Calsonic Kansei Corp
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 Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Assigned to CALSONIC KANSEI CORPORATION reassignment CALSONIC KANSEI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TOYOSHIMA, YOUHEI
Publication of US20040149515A1 publication Critical patent/US20040149515A1/en
Abandoned 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus
    • 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
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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 present invention is related to a muffler located at midpoint of a discharge pipe of a fuel cell vehicle in use of a fuel gas.
  • the automotive includes a discharge pipe for discharging of an exhaust gas from a fuel cell.
  • the automotive includes a drain-pipe midstream of the discharge pipe. See Japanese Patent Application Publication Laid-Open No. 2002-96648.
  • An aspect of the invention provides the following muffler.
  • the muffler includes a sound-absorbing structure having a gas introduced from a fuel cell.
  • the muffler includes an outlet defined by the sound-absorbing structure for discharging a drain separated from the gas.
  • the sound-absorbing structure has an action of expansion, interference, sound-absorbing or resonance, with an expansion chamber, sound-absorbing material, a resonance chamber, a flow division arrangement, or a combination of the structures.
  • the sound-absorbing structure may have expansion chambers separated from each other.
  • One of the expansion chambers has an inlet for introducing the gas.
  • the outlet is located at said one of the expansion chambers.
  • the sound-absorbing structure may include a remover configured to remove moisture from the gas.
  • the sound-absorbing structure may have an inlet for introducing the gas from the fuel cell.
  • the remover includes a tube enclosing the inlet and having a first hole through the tube in a radial direction.
  • the remover includes a wall located opposing the inlet and closing off the tube in an axial direction.
  • the tube may be configured in a cylindrical shape.
  • the expansion chambers may include a partition between the expansion chambers.
  • the partition defines a second hole for the expansion chambers to communicate with each other through the second hole.
  • the second hole may be located at a lower half portion of the partition in a vertical direction.
  • the outlet may connect with another tube.
  • FIG. 1 is a schematic view of a discharge system adapted for a fuel cell according to a first embodiment of the invention
  • FIG. 2 is a sectional view of a muffler in FIG. 1;
  • FIG. 3A is a perspective view of a moisture-remover in FIG. 2, as viewed from downstream;
  • FIG. 3B is a perspective view of a moisture-remover in FIG. 2, as viewed from upstream;
  • FIG. 4 is a sectional view of a muffler according to a second embodiment of the invention.
  • FIG. 5 is a sectional view of modified drainage structure of the muffler in FIGS. 2 and 4;
  • FIG. 6 shows a characteristic diagram of sound-damping deterioration level relative to moisture content rate of sound-absorption material with a frequency band of 0.6 to 1.0 kHz in average;
  • FIG. 7 shows a characteristic diagram of sound-damping deterioration level relative to moisture content rate of sound-absorption material with a frequency band of 1.4 to 2.0 kHz in average
  • the horizontal axis indicates moisture content rate of a sound-absorption material
  • the vertical axis indicates sound-pressure level, wherein higher sound-pressure level indicates worse sound-damping deterioration level (insertion-loss deterioration level or lower sound-damping performance).
  • a fuel cell 100 has fuel and air which are introduced therein for an electrochemical reaction that produces electronic power.
  • the fuel cell 100 has upstream and downstream pipes 7 , 8 for discharging an exhaust gas.
  • the fuel cell 100 has mufflers 1 A or 1 B between the discharge pipes 7 , 8 .
  • the mufflers 1 A or 1 B may be positioned upstream of the fuel cell 100 between the fuel cell 100 and a fuel storage or an air storage.
  • a muffler 1 A includes a cylindrical shell 2 , with two circular end plates 3 , 4 closing both ends of the shell 2 .
  • the shell 2 and end plates 3 , 4 define a space hermetically sealed inside of them.
  • the space is separated into four first to fourth expansion chambers 6 a to 6 d of a sound-absorption material by three partitions 5 a, 5 b and 5 c.
  • the end plate 3 of first chamber 6 a has a hole 3 a connected to an inlet 7 a of an upstream discharge pipe 7 .
  • the other end of discharge pipe 7 is connected to a fuel cell 100 (not illustrated in Fig.).
  • An exhaust gas from the fuel cell 100 flows into the first expansion chamber 6 a through discharge pipe 7 .
  • the muffler 1 A includes a downstream discharge pipe 8 with an end that passes through a hole 4 a of the end plate 4 of the fourth expansion chamber 6 d and respective three partitions 5 a to 5 c.
  • the inlet 8 a of discharge pipe 8 is positioned to face the first expansion chamber 6 a.
  • the discharge pipe 8 extends between the second, third, and fourth chambers 6 b, 6 c, and 6 d, with a circumferential wall having a mesh 9 formed with holes.
  • An exhaust gas flows into or out between the second to fourth expansion chambers 6 b to 6 d through mesh 9 .
  • the first expansion chamber 6 a houses a moisture-remover 10 therein.
  • the moisture-remover 10 is located to enclose the inlet 7 a of discharge pipe 7 .
  • the moisture-remover 10 includes acylindrical pipe 11 formed radially with holes 11 a.
  • the moisture-remover 10 includes a hole-free closed plate 12 located to face the inlet 7 a of discharge pipe 7 .
  • the closed plate 12 is fixed to and closes off the circular end of moisture-remover 10 .
  • the shell 2 has an outlet 13 in the first expansion chamber 6 a at the lowermost part in a vertical direction.
  • the outlet 13 may be located at any portions on the shell 2 of the expansion chamber 6 a in a radial or transverse direction of the shell 2 .
  • the outlet 13 may be located to or extend between at least one of first, second, third and fourth expansion chambers 6 a, 6 b, 6 c and 6 d.
  • the outlet 13 may be shaped as a circle, a triangle, a rectangle, a polygon or other configuration.
  • An exhaust gas with moisture flows from a fuel cell 100 into the first expansion chamber 6 a through the discharge pipe 7 .
  • the exhaust gas disperses in a space inside of the first expansion chamber 6 a.
  • the exhaust gas flows into the second to fourth expansion chambers 6 b to 6 d, while dispersing.
  • the exhaust gas collides against the shell 2 or end plates 3 , 4 , of a sound-absorption material, thus being damped.
  • the exhaust gas flowing from discharge pipe 7 into first expansion chamber 6 a, collides against the closed plate 12 , while dispersing. Lower temperaturization during gas dispersion and collision against the closed plate 12 accelerate to condense the moisture in the exhaust gas.
  • the exhaust gas, colliding against closed plate 12 is discharged from the moisture-remover 10 through the holes 11 a of pipe 11 to collide against the inner wall of shell 2 at the first chamber 6 a.
  • the collision accelerates to condense moisture in the exhaust gas.
  • the first expansion chamber 6 a stores drain to be discharged from the outlet 13 .
  • An exhaust gas colliding against the inner wall of shell 2 at the first expansion chamber, flows into discharge pipe 8 through the opening 5 a 1 of partition 5 a.
  • the exhaust gas travels downstream, while flowing into and out of the second to fourth expansion chambers 6 b to 6 d, repeatedly. Finally, the exhaust gas is discharged to outside air through the discharge pipe 8 .
  • the operation reduces moisture content mixed with the exhaust gas in the muffler 1 A, preventing water-jump from discharge pipe 8 .
  • the muffler 1 A does not store a drain therein, and maintains stable sound-damping performance.
  • the moisture-remover 10 in the first expansion chamber 6 a condenses moisture in the exhaust gas. This further reduces moisture content mixed in the exhaust gas, effectively preventing water-jump.
  • An exhaust gas passes through holes 11 a to be arranged in streams, reducing airflow noise and pressure loss of the exhaust gas.
  • the moisture-remover may have another structure other than the aforementioned, which can separate and condense moisture from the exhaust gas.
  • the moisture-remover 10 has the cylindrical pipe 11 , which radially discharges exhaust gas from the holes 11 a of the pipe 11 toward the inner wall of shell 2 at the first expansion chamber 6 a. This smoothes a flow of the exhaust gas and further reduces airflow noise and pressure loss.
  • the pipe 11 may have another shape other than a cylindrical shape.
  • a muffler 1 B according to the second embodiment is described.
  • the muffler 1 B is characterized by communication holes 14 a, 14 b, 14 c formed at respective lower positions of partitions 5 a, 5 b, 5 c.
  • the muffler 1 B includes other constitutions similar to the muffler 1 A.
  • Like members are designated by like reference characters in Figs, with the descriptions omitted.
  • the muffler 1 B reduces moisture content mixed in an exhaust gas, preventing water-jump. Without requiring storing drain inside, the muffler 1 B maintains stable sound-damping performance.
  • a drain stored in the second to fourth expansion chambers 6 b to 6 d flows into the first expansion chamber, and is discharged from the outlet 13 .
  • the muffler 1 B further reduces drain volume, and further maintains stable sound-damping performance.
  • FIG. 5 a modification of the drainage structure is described.
  • the outlet 13 is connected to an end of a small-sized tube 15 .
  • a drain in the first expansion chamber 6 a is discharged from outlet 13 through the tube 15 . It is preferable to use the tube 15 having a smaller size in view of sound-damping performance.
  • the drainage structure reduces noise (pulse-stream noise, airflow noise, whistle noise or the like) from outlet 13 .
  • the tube 15 has an arbitrarily positioned opening at the other end, which facilitates taking measures against water-jump of drain discharged from outlet 13 .
  • the outlet 13 may have an open/close valve or a lid.
  • the structure reduces noise (pulse-stream noise, airflow noise), and, in addition, allows appropriate selection of drainage timing for easy measures against water-jump.
  • the aforementioned first and second embodiments have mufflers 1 A, 1 B separated into the first to fourth expansion chambers 6 a to 6 d inside thereof.
  • the mufflers 1 A, 1 B may be separated into two, three, or five or more chambers, and may be appropriately changed in design in accordance with an object of sound-damping.
  • the discharge pipe includes a muffler midstream thereof.
  • the storing of a drain in the muffler deteriorates sound-damping performance of the muffler.
  • sound absorption material used for the muffler regardless of whether high or low pitched sound, has sound-damping deterioration level which increases rapidly at a moisture content rate over 4%, and is further increased by higher pitched sound, as shown in FIGS. 6 and 7.
  • the moisture content rate (%) represents a value of (a volume of water)/(a volume of filled absorption material).
  • the reason for the rapid increase of sound-damping deterioration level is considered to be that moisture content reduces contact surface area of the sound absorption material.
  • the gas when a gas is introduced from a fuel cell into a sound-absorbing structure or an expansion chamber, the gas is dispersed to accelerate moisture included in the gas to be condensed into a drain.
  • the drain is discharged from an outlet of the sound-absorbing structure or the expansion chamber.
  • a remover separates moisture from the gas. This reduces moisture content mixed in the gas, thus preventing water-jump from a discharge pipe.
  • a gas is introduced into the expansion chamber to collide against a closed wall.
  • the collision allows moisture to be separated from the gas.
  • the gas is discharged from holes of a tube to collide against an inner wall of the expansion chamber.
  • the collision allows moisture in the gas to be condensed and separated therefrom.
  • the operation permits the remover to separate moisture from the gas.
  • the gas is arranged in streams through the holes, thus reducing airflow noise and pressure loss.
  • the gas is discharged radially toward an inner wall of the expansion chamber through the holes. This permits the gas to be smoothly discharged, thus reducing airflow noise and pressure loss.
  • a volume of drain is further reduced in the muffler, which maintains stable sound-damping performance.
  • a tube reduces noise from the outlet. Arbitrary positioning of the other end of the tube facilitates taking measures against water-jump to be discharged from the outlet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Exhaust Silencers (AREA)
US10/760,346 2003-01-22 2004-01-21 Muffler Abandoned US20040149515A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003013544A JP2004225595A (ja) 2003-01-22 2003-01-22 消音器
JP2003-013544 2003-01-22

Publications (1)

Publication Number Publication Date
US20040149515A1 true US20040149515A1 (en) 2004-08-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/760,346 Abandoned US20040149515A1 (en) 2003-01-22 2004-01-21 Muffler

Country Status (3)

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US (1) US20040149515A1 (ja)
EP (1) EP1447534A3 (ja)
JP (1) JP2004225595A (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070178352A1 (en) * 2006-02-02 2007-08-02 In Youl Jeon Fuel cell system with muffler
US20070246295A1 (en) * 2004-09-15 2007-10-25 Shinji Aso Fuel Cell Vehicle and Vehicle
US20080141667A1 (en) * 2006-12-18 2008-06-19 Gm Global Technology Operations, Inc. Fuel-cell exhaust system
US20080185218A1 (en) * 2005-03-24 2008-08-07 Toshiyuki Kondo Noise Eliminator For Fuel Cell
US20090236174A1 (en) * 2006-10-03 2009-09-24 Toyota Jidosha Kabushiki Kaisha Exhaust apparatus of vehicle engine
CN103178279A (zh) * 2011-12-23 2013-06-26 三星电子株式会社 消音器以及包括该消音器的燃料电池系统
US20130175114A1 (en) * 2012-01-11 2013-07-11 Jin-suck HEO Hybrid silencer with gas-liquid separating function in fuel cell system
US10243227B2 (en) * 2016-12-06 2019-03-26 Hyundai Motor Company Apparatus for reducing hydrogen concentration in exhaust gas of an exhaust system for a fuel cell vehicle
CN110500261A (zh) * 2019-07-26 2019-11-26 郑州精益达环保科技有限公司 一种氢燃料电池系统排气消声器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100644969B1 (ko) 2005-10-31 2006-11-14 한국과학기술연구원 소음기능을 가지는 연료전지용 가습장치
JP5214906B2 (ja) * 2007-05-11 2013-06-19 本田技研工業株式会社 燃料電池システム
JP5443693B2 (ja) * 2008-01-22 2014-03-19 本田技研工業株式会社 燃料電池自動車の消音器
CN102278183B (zh) * 2011-07-19 2013-05-29 南京航空航天大学 一种复合式结构的柴油机排气消声器
KR102463703B1 (ko) * 2016-12-15 2022-11-07 현대자동차주식회사 배기유체 중의 물 배출장치 및 연료전지 차량용 소음기
FR3123944A1 (fr) * 2021-06-10 2022-12-16 Novares France Silencieux d'échappement pour une pile à combustible
DE102022112680A1 (de) * 2022-05-20 2023-11-23 Purem GmbH Brennstoffzellen-Abgasanlage

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US753845A (en) * 1903-08-07 1904-03-08 Richard W Brockway Gasolene-engine muffler.
US1342464A (en) * 1919-12-02 1920-06-08 Frank P Sawders Muffler
US1821688A (en) * 1929-12-20 1931-09-01 Maxim Silencer Co Silencer
US2059487A (en) * 1932-10-31 1936-11-03 Halsey W Taylor Company Muffler
US2087411A (en) * 1934-01-10 1937-07-20 Frederick L Maytag Means for condensing and refining exhaust gases
US2416452A (en) * 1945-01-25 1947-02-25 Joseph P Marx Muffler
US2498979A (en) * 1943-09-18 1950-02-28 Maxim Silencer Co Water separator silencer
US2721619A (en) * 1951-08-01 1955-10-25 Alpha G Cheairs Waterproof muffler for vertical exhausts
US2732913A (en) * 1956-01-31 Q higgins
US3421315A (en) * 1966-02-01 1969-01-14 Katashi Aoki Exhaust gas purifier for automobile
US3548591A (en) * 1968-09-11 1970-12-22 William H Mckay Smog control device
US3563029A (en) * 1969-03-13 1971-02-16 Dow Chemical Co Muffler for removing particulate lead from exhaust gases of internal combustion engines
US3635309A (en) * 1970-09-30 1972-01-18 Prvni Brnenska Strojirna Steam or gas damper with axial and radial baffle plates
US3698875A (en) * 1970-05-13 1972-10-17 Susumu Yamada Device for cleaning exhaust gas from internal combustion engine
US3999967A (en) * 1974-05-16 1976-12-28 Katashi Aoi Apparatus for purifying exhaust gas
US4072170A (en) * 1975-06-03 1978-02-07 Bertin & Cie Pressure-relieving device for steam generators and the like
US4286976A (en) * 1979-01-29 1981-09-01 Eriksson Gunar Combined sound damper and oil trap for a compressed air apparatus
US4296832A (en) * 1979-11-14 1981-10-27 Nelson Industries, Inc. Exhaust muffler
US4503813A (en) * 1983-07-07 1985-03-12 Combustion Control Developments Ltd. Engine combustion control system and method employing condensation of some exhaust gas
US5808245A (en) * 1995-01-03 1998-09-15 Donaldson Company, Inc. Vertical mount catalytic converter muffler
US6564833B2 (en) * 2000-09-22 2003-05-20 Honda Giken Kogyo Kabushiki Kaisha Gas discharge structure for gaseous fuel
US6868670B1 (en) * 2003-02-28 2005-03-22 Fleetguard, Inc. Compact, reduced backpressure, vertical exhaust water trap assembly
US6968923B2 (en) * 2003-07-30 2005-11-29 Control Components, Inc. Reduced noise valve stack connection

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747347A (en) * 1971-04-12 1973-07-24 S Ciraolo Pollution preventing exhaust device
US6152258A (en) * 1999-09-28 2000-11-28 Brunswick Corporation Exhaust system with silencing and water separation capability

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732913A (en) * 1956-01-31 Q higgins
US753845A (en) * 1903-08-07 1904-03-08 Richard W Brockway Gasolene-engine muffler.
US1342464A (en) * 1919-12-02 1920-06-08 Frank P Sawders Muffler
US1821688A (en) * 1929-12-20 1931-09-01 Maxim Silencer Co Silencer
US2059487A (en) * 1932-10-31 1936-11-03 Halsey W Taylor Company Muffler
US2087411A (en) * 1934-01-10 1937-07-20 Frederick L Maytag Means for condensing and refining exhaust gases
US2498979A (en) * 1943-09-18 1950-02-28 Maxim Silencer Co Water separator silencer
US2416452A (en) * 1945-01-25 1947-02-25 Joseph P Marx Muffler
US2721619A (en) * 1951-08-01 1955-10-25 Alpha G Cheairs Waterproof muffler for vertical exhausts
US3421315A (en) * 1966-02-01 1969-01-14 Katashi Aoki Exhaust gas purifier for automobile
US3548591A (en) * 1968-09-11 1970-12-22 William H Mckay Smog control device
US3563029A (en) * 1969-03-13 1971-02-16 Dow Chemical Co Muffler for removing particulate lead from exhaust gases of internal combustion engines
US3698875A (en) * 1970-05-13 1972-10-17 Susumu Yamada Device for cleaning exhaust gas from internal combustion engine
US3635309A (en) * 1970-09-30 1972-01-18 Prvni Brnenska Strojirna Steam or gas damper with axial and radial baffle plates
US3999967A (en) * 1974-05-16 1976-12-28 Katashi Aoi Apparatus for purifying exhaust gas
US4072170A (en) * 1975-06-03 1978-02-07 Bertin & Cie Pressure-relieving device for steam generators and the like
US4286976A (en) * 1979-01-29 1981-09-01 Eriksson Gunar Combined sound damper and oil trap for a compressed air apparatus
US4296832A (en) * 1979-11-14 1981-10-27 Nelson Industries, Inc. Exhaust muffler
US4503813A (en) * 1983-07-07 1985-03-12 Combustion Control Developments Ltd. Engine combustion control system and method employing condensation of some exhaust gas
US5808245A (en) * 1995-01-03 1998-09-15 Donaldson Company, Inc. Vertical mount catalytic converter muffler
US6564833B2 (en) * 2000-09-22 2003-05-20 Honda Giken Kogyo Kabushiki Kaisha Gas discharge structure for gaseous fuel
US6868670B1 (en) * 2003-02-28 2005-03-22 Fleetguard, Inc. Compact, reduced backpressure, vertical exhaust water trap assembly
US6968923B2 (en) * 2003-07-30 2005-11-29 Control Components, Inc. Reduced noise valve stack connection

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070246295A1 (en) * 2004-09-15 2007-10-25 Shinji Aso Fuel Cell Vehicle and Vehicle
US7743883B2 (en) 2005-03-24 2010-06-29 Toyota Jidosha Kabushiki Kaisha Noise eliminator for fuel cell
US20080185218A1 (en) * 2005-03-24 2008-08-07 Toshiyuki Kondo Noise Eliminator For Fuel Cell
US7484590B2 (en) * 2006-02-02 2009-02-03 Samsung Sdi Co., Ltd. Fuel cell system with muffler
US20070178352A1 (en) * 2006-02-02 2007-08-02 In Youl Jeon Fuel cell system with muffler
US20090236174A1 (en) * 2006-10-03 2009-09-24 Toyota Jidosha Kabushiki Kaisha Exhaust apparatus of vehicle engine
US20080141667A1 (en) * 2006-12-18 2008-06-19 Gm Global Technology Operations, Inc. Fuel-cell exhaust system
US7878298B2 (en) * 2006-12-18 2011-02-01 GM Global Technology Operations LLC Fuel-cell exhaust system
CN103178279A (zh) * 2011-12-23 2013-06-26 三星电子株式会社 消音器以及包括该消音器的燃料电池系统
US20130175114A1 (en) * 2012-01-11 2013-07-11 Jin-suck HEO Hybrid silencer with gas-liquid separating function in fuel cell system
CN103208638A (zh) * 2012-01-11 2013-07-17 三星电子株式会社 在燃料电池系统中提供气液分离功能的混合消音器
US9038772B2 (en) * 2012-01-11 2015-05-26 Samsung Sdi Co., Ltd. Hybrid silencer with gas-liquid separating function in fuel cell system
US10243227B2 (en) * 2016-12-06 2019-03-26 Hyundai Motor Company Apparatus for reducing hydrogen concentration in exhaust gas of an exhaust system for a fuel cell vehicle
CN110500261A (zh) * 2019-07-26 2019-11-26 郑州精益达环保科技有限公司 一种氢燃料电池系统排气消声器

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Publication number Publication date
JP2004225595A (ja) 2004-08-12
EP1447534A3 (en) 2005-07-06
EP1447534A2 (en) 2004-08-18

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