EP0473081A1 - Abgasreinigungsvorrichtung - Google Patents

Abgasreinigungsvorrichtung Download PDF

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Publication number
EP0473081A1
EP0473081A1 EP91114196A EP91114196A EP0473081A1 EP 0473081 A1 EP0473081 A1 EP 0473081A1 EP 91114196 A EP91114196 A EP 91114196A EP 91114196 A EP91114196 A EP 91114196A EP 0473081 A1 EP0473081 A1 EP 0473081A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
plate
pipe section
exhaust pipe
disposed
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
EP91114196A
Other languages
English (en)
French (fr)
Other versions
EP0473081B1 (de
Inventor
Taketsugu Kume
Mitsuru Tachikawa
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.)
Suzuki Co Ltd
Suzuki Motor Corp
Original Assignee
Suzuki Co Ltd
Suzuki Motor 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 Suzuki Co Ltd, Suzuki Motor Corp filed Critical Suzuki Co Ltd
Publication of EP0473081A1 publication Critical patent/EP0473081A1/de
Application granted granted Critical
Publication of EP0473081B1 publication Critical patent/EP0473081B1/de
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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction

Definitions

  • the present invention relates to an exhaust gas purifying device mounted to an engine unit of, for example, a motorcycle.
  • an exhaust gas purifying device in which the exhaust gas is purified by carrying out oxidation reaction utilizing catalyst contact reaction between unburnt constituents such as and/or harmful constituents such as carbon monoxide and hydrocarbon contained in the exhaust gas and a catalyst.
  • the catalyst is utilized for increasing temperature of an engine exhaust gas to carry out the oxidation reaction.
  • the exhaust gas is purified by the contact of the exhaust gas to the catalyst disposed in a muffler connected to an exhasut gas tube.
  • the muffler of the motorcycle generally comprises an exhaust pipe section and a muffler section and is provided with a plate member to which a catalyst is applied.
  • the plate member comprises two plates bent in an arcuate manner adjacently to the inner wall of a muffler body and the plates are mounted to the inner wall surface of the muffler body keeping a clearance of 1 to 5 mm with respect to the inner wall surface so that the exhaust gas flowing through the muffler can be brought into contact with the catalyst applied to the plate member.
  • the plates with the catalyst are disposed cylindrically in an assembled state along the inner wall surface of the muffler body adjacently to the inner wall surface thereof and a portion of the exhaust gas to be brought into contact with the catalyst of the plate member has a relatively low temperature in the surrounding portion of a tubular passage. Therefore, it takes much time to increase the temperature to start the catalytic reaction, hence resulting in degradation of an exhaust gas purification performance.
  • a surface temperature of the muffler body increases high because the plates with catalyst are disposed near the surface of the muffler body.
  • An object of the present invention is to substantially eliminate defects or drawbacks encountered in the prior art described above and to provide an exhaust gas purifying device capable of improving a catalytic reaction between the engine exhaust gas and the device to enhance the exhaust gas purifying performance and reducing thermal influence on a muffler as well as improving an engine power.
  • an exhaust gas purifying device in which an exhaust gas from an exhasut port of an engine is purified by a member provided with a catalyst disposed in a cylindrical muffler provided with an exhaust pipe section connected to the engine exhaust gas port, the device being characterized in that a catalyst plate means to which a catalyst is applied is disposed so as to extend throughout a longitudinal direction of the exhaust pipe section at substantially a diametrically central portion in cross section of the exhaust pipe section.
  • the catalyst plate means including at least one plate member of a sandwich structure comprising a central plate and catalyst layers disposed on both side surfaces of the central plate, and coating layers may be further disposed between the central plate and the catalyst layers.
  • the catalyst plate means is composed of one catalyst plate member and is disposed a diametrical portion of the exhaust pipe section or in the diametrically central portion of the exhaust pipe section within a range of 1/3d to 2/3d, wherein a symbol d designates an inner diameter of the exhasut pipe section, from an inner surface thereof.
  • the catalyst plate to which a catalyst is applied is disposed at the diametrically central portion or near of the exhaust gas section of the muffler, and when the exhaust gas flows flom the engine exhaust port into the muffler, a high temperature portion of the exhaust gas contacts the catalyst. Accordingly, the catalytic reaction promptly and positively starts to thereby enhance the exhaust gas purifying performance. Moreover, since the catalyst plate is disposed at substantially the central portion in the muffler, a large distance exsits between it and the inner wall surface of the muffler, so that the increasing of the temperature of the muffler surface can be significantly suppressed, resulting in the improvement of the engine output power.
  • Fig. 10 shows a motorcycle of the type to which the present invention is preferably applicable and the motorcycle 1 is equipped with a muffler 2 which is connected to an exhaust pipe connected to an engine exhaust port.
  • the muffler 2 of the motorcycle 1 generally comprises an exhaust pipe section 3 and a muffler section 4.
  • a silencer 7 is connected to the muffler 2 through an exhaust pipe 6.
  • a pair of semi-circular plates 8 and 8 to which catalyst is applied are disposed and the plates 8 and 8 are bent in an arcuate manner adjacently to the inner wall of a muffler body 5.
  • the plates 8 are mounted to the inner wall surface of the muffler body 5 keeping a clearance of 1 to 5 mm with respect to the inner wall surface so that the exhaust gas flowing through the muffler 2 can be brought into contact with the catalyst applied to the plates 6 and 6.
  • An exhaust gas purifying device of the conventional muffler of the motorcycle is constructed as described above.
  • the conventional exhaust gas purifying device provides problems described hereinbefore.
  • the muffler 10 comprises a muffler body 15 including an exhasut pipe section 11 which is connected to an engine exhaust port of the motorcycle and a muffler section 12 coupled with the exhaust pipe section 11.
  • the muffler section 12 has an expansion chamber formed by swelling a portion of the muffler body 15.
  • An exhaust pipe 13 is connected to the downstream side of the muffler section 12, and a silencer 14 is connected to the exhasut pipe 13.
  • the muffler 10 is referred to a muffler located on the left side of the motorcycle body.
  • Fig. 2 is a cross section of the exhaust pipe section 11 of the muffler 10 representing an exhaust gas purifying device according to one embodiment of the present invention.
  • the muffler body 15 of the muffler 10 is formed of a pair of inner and outer halves 15a and 15b, in which the inner body 15a is to be disposed on the side of a mototcycle body and the outer body 15b is to be disposed on the outside.
  • the inner and outer muffler bodies 15a and 15b each has a semicircular cross section and constitutes a cylindrical pipe as the muffler body 15 when mated with each other.
  • a plate 16 to which a catalyst is applied is disposed in the diameter direction at the central portion of the cross section of the muffler body 15 so that both the side ends of the plate 16 are secured, for example by means of welding, to the joined portions of the inner and outer muffler boies 15a and 15b along the longitucinal directions of the exhaust pipe section 11.
  • the plate 16 will be called a catalyst plate 16 hereinlater for the sake of convenience.
  • Fig. 3 shows another embodiment according to the present invention, in which the catalyst plate 16 is fixedly secured in the vertical direction, as viewed, in the interior of the inner body 15a side.
  • the catalyst plate 16 is disposed at a portion offset from the diameter direction of the muffler body 15 within a range of 1/3d to 2/3d (1/3d ⁇ l ⁇ 2/3d), wherein a symbol d is an inner diameter of the muffler body, and this range will be referred to as a central portion hereinlater offset to the side of the inner wall surface of the inner muffler body 15a in comparison with the location of Fig. 2.
  • Fig. 4 shows a further embodiment according to the present invention, in which the catalyst plate 16 is disposed at the central portion similar to that of Fig. 3, but in the embodiment of Fig. 4, the catalyst plate 16 is provided with a supplementary rib portion 16a at an intermediate portion thereof so as to increase the strength of the catalyst plate 16 as well as to enlarge the surface area of the catalyst.
  • Fig. 5 shows a still further embodiment according to the present invention, in which the catalyst plate 16 of the type shown in Fig. 3 is mounted to each of the inner and outer bodies 15a and 15b in the central portion of the muffler body 15.
  • the catalyst plate 16 of the type shown in Fig. 3 is mounted to each of the inner and outer bodies 15a and 15b in the central portion of the muffler body 15.
  • two catalyst plates are disposed in the central portion, i.e. within the range from 1/3d to 2/3d (d: inner diameter of the muffler body 15), for example, in a centrally symmetrical manner.
  • the total surface area of the catalyst can be increased as well as increasing of the strength.
  • the catalyst plate 16 has a sandwich structure, for example, shown in Fig. 6 as an enlarged fragmental section.
  • the catalyst plate 16 comprises a punched plate 17 arranged centrally of the sandwich structure, coating layers 18 applied on both the sides of the punched plate 17 and catalyst layers 19 applied to the outer surface of the coating layers 18, which are disposed for the purpose of improving a firm connection of the catalyst layers 19 to the outer surfaces of the punched plate 17.
  • the punched plate 17 is utilized for improving the flow of the exhasut gas through punched holes of the plate 17, a blind plate with no holes may be also utilized.
  • the punched plate 17 it is desired to form the punched plate 17 with a stainless steel plate and to form the coating layers 18 by flame coating a ceramic material such as white aluminium material in ceramic state.
  • a ceramic material such as white aluminium material in ceramic state.
  • a catalyst mainly consisting of platinum and rhodium may be preferably utilized.
  • the coating layers 18 may be eliminated.
  • the exhaust gas purifying device of each of the present embodiments will operates as follows.
  • the exhaust gas from the engine exhasut port flowing through the central portion of the exhaust pipe section of the muffler body 15 has a temperature higher than that flowing along the radially peripheral portion thereof.
  • the high-temperature exhaust gas flows through the central portion therein.
  • the catalyst plate is arranged in the central portion of the flow passage, the high-temperature exhaust gas positively comes into contact with the catalyst, i.e. catalyst layers of the catalyst plate, and promptly reacts therewith. Therefore, the catalytic reaction will start promptly and the exhaust gas purification capability can be hence enhanced.
  • Fig. 8 shows a fact that the surface temperature of the muffler body according to the present invention is lower as indicated by the solid line A in comparison with the conventional one indicated by the dotted line B throughout the whole longitudinal length of the muffler 2.
  • the exhaust gas purifying device is equipped for the muffler disposed on the left side of the motorcycle body, but substantially the same device is disposed to the muffler on the right side of the motorcycle body.
  • the catalyst plate when the catalyst plate is arranged in an offset manner such as shown in Fig. 3 or 4, the catalyst plate will be displaced on the side of the inner wall of the inner body half 15a.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
EP91114196A 1990-08-27 1991-08-23 Abgasreinigungsvorrichtung Expired - Lifetime EP0473081B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP222501/90 1990-08-27
JP2222501A JP2952997B2 (ja) 1990-08-27 1990-08-27 排気ガス浄化装置

Publications (2)

Publication Number Publication Date
EP0473081A1 true EP0473081A1 (de) 1992-03-04
EP0473081B1 EP0473081B1 (de) 1994-06-08

Family

ID=16783420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114196A Expired - Lifetime EP0473081B1 (de) 1990-08-27 1991-08-23 Abgasreinigungsvorrichtung

Country Status (4)

Country Link
EP (1) EP0473081B1 (de)
JP (1) JP2952997B2 (de)
KR (1) KR950004354B1 (de)
DE (1) DE69102371T2 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709327A1 (fr) * 1993-08-28 1995-03-03 Stihl Andreas Pot catalytique pour machines-outils guidées manuellement.
EP0699829A3 (de) * 1994-09-05 1996-05-01 Honda Motor Co Ltd Vorrichtung zur Reinigung von Motorabgasen
US5546748A (en) * 1992-11-27 1996-08-20 Sanshin Kogyo Kabushiki Kaisha Exhaust system for outboard motor
WO1997001023A1 (en) * 1995-06-22 1997-01-09 Aktiebolaget Electrolux Muffler with catalytic converter
EP0753651A1 (de) * 1995-07-08 1997-01-15 Adam Opel Ag Abgasanlage einer Mehrzylinder-Brennkraftmaschine
WO1997007327A1 (de) * 1995-08-16 1997-02-27 Emitec Gesellschaft Für Emissionstechnologie Mbh Katalysator zur verringerung von kohlenwasserstoff in abgasen eines kraftfahrzeuges
DE19704689A1 (de) * 1997-02-07 1998-08-13 Emitec Emissionstechnologie Wabenkörper mit im Inneren freiem Querschnittsbereich, insbesondere für Kleinmotoren
US6134885A (en) * 1998-03-16 2000-10-24 Gilbertson; Gary G. Exhaust system tuned for performance with shared wall
EP1099833A2 (de) * 1999-11-09 2001-05-16 Cataler Corporation Rohrförmiger Katalysatorbau für die Abgasreinigung
CN101900630A (zh) * 2010-07-21 2010-12-01 力帆实业(集团)股份有限公司 摩托车消声器振动检具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6034827B2 (ja) * 2014-05-09 2016-11-30 本田技研工業株式会社 鞍乗り型車両の排気装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375449A1 (fr) * 1976-12-24 1978-07-21 Degussa Dispositif pour la purification catalytique des gaz d'echappement
DE2942728A1 (de) * 1979-10-23 1981-05-07 Bremshey Ag, 5650 Solingen Doppelwandige auspuffrohrleitung
FR2633366A1 (fr) * 1988-06-27 1989-12-29 Rosi Ets Tubulure, notamment pour fluides a haute temperature
EP0401195A2 (de) * 1989-06-01 1990-12-05 Franz Dipl.Ing.Dr. Laimböck Auspuffanlage, insbesondere für Zweitakt-Brennkraftmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375449A1 (fr) * 1976-12-24 1978-07-21 Degussa Dispositif pour la purification catalytique des gaz d'echappement
DE2942728A1 (de) * 1979-10-23 1981-05-07 Bremshey Ag, 5650 Solingen Doppelwandige auspuffrohrleitung
FR2633366A1 (fr) * 1988-06-27 1989-12-29 Rosi Ets Tubulure, notamment pour fluides a haute temperature
EP0401195A2 (de) * 1989-06-01 1990-12-05 Franz Dipl.Ing.Dr. Laimböck Auspuffanlage, insbesondere für Zweitakt-Brennkraftmaschinen

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5546748A (en) * 1992-11-27 1996-08-20 Sanshin Kogyo Kabushiki Kaisha Exhaust system for outboard motor
FR2709327A1 (fr) * 1993-08-28 1995-03-03 Stihl Andreas Pot catalytique pour machines-outils guidées manuellement.
US5729972A (en) * 1994-09-05 1998-03-24 Honda Giken Kogyo Kabushiki Kaisha Engine exhaust purifying device
EP0699829A3 (de) * 1994-09-05 1996-05-01 Honda Motor Co Ltd Vorrichtung zur Reinigung von Motorabgasen
WO1997001023A1 (en) * 1995-06-22 1997-01-09 Aktiebolaget Electrolux Muffler with catalytic converter
US6109026A (en) * 1995-06-22 2000-08-29 Aktiebolaget Electrolux Muffler with catalytic converter
EP0753651A1 (de) * 1995-07-08 1997-01-15 Adam Opel Ag Abgasanlage einer Mehrzylinder-Brennkraftmaschine
WO1997007327A1 (de) * 1995-08-16 1997-02-27 Emitec Gesellschaft Für Emissionstechnologie Mbh Katalysator zur verringerung von kohlenwasserstoff in abgasen eines kraftfahrzeuges
DE19704689A1 (de) * 1997-02-07 1998-08-13 Emitec Emissionstechnologie Wabenkörper mit im Inneren freiem Querschnittsbereich, insbesondere für Kleinmotoren
US6485694B1 (en) 1997-02-07 2002-11-26 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Honeycomb body with a cross-sectional region which is bordered in the interior, in particular for small engines
US6134885A (en) * 1998-03-16 2000-10-24 Gilbertson; Gary G. Exhaust system tuned for performance with shared wall
EP1099833A2 (de) * 1999-11-09 2001-05-16 Cataler Corporation Rohrförmiger Katalysatorbau für die Abgasreinigung
CN101900630A (zh) * 2010-07-21 2010-12-01 力帆实业(集团)股份有限公司 摩托车消声器振动检具
CN101900630B (zh) * 2010-07-21 2012-06-20 力帆实业(集团)股份有限公司 摩托车消声器振动检具

Also Published As

Publication number Publication date
JPH04109022A (ja) 1992-04-10
EP0473081B1 (de) 1994-06-08
DE69102371D1 (de) 1994-07-14
KR950004354B1 (ko) 1995-04-28
JP2952997B2 (ja) 1999-09-27
DE69102371T2 (de) 1994-09-29
KR920004698A (ko) 1992-03-28

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