EP1099833A2 - Rohrförmiger Katalysatorbau für die Abgasreinigung - Google Patents

Rohrförmiger Katalysatorbau für die Abgasreinigung Download PDF

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Publication number
EP1099833A2
EP1099833A2 EP00123658A EP00123658A EP1099833A2 EP 1099833 A2 EP1099833 A2 EP 1099833A2 EP 00123658 A EP00123658 A EP 00123658A EP 00123658 A EP00123658 A EP 00123658A EP 1099833 A2 EP1099833 A2 EP 1099833A2
Authority
EP
European Patent Office
Prior art keywords
pipe
metallic
exhaust gas
shaped
catalyst
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Withdrawn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
EP00123658A
Other languages
English (en)
French (fr)
Other versions
EP1099833A3 (de
Inventor
Masayusu Sato
Teruhiko Ozawa
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.)
Cataler Corp
Original Assignee
Cataler 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 Cataler Corp filed Critical Cataler Corp
Publication of EP1099833A2 publication Critical patent/EP1099833A2/de
Publication of EP1099833A3 publication Critical patent/EP1099833A3/de
Withdrawn legal-status Critical Current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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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

Definitions

  • This invention relates to a pipe-shaped catalyst construction for exhaust gas purification used to purify an exhausted gas discharged from a motorbike or an automobile.
  • the pipe-shaped catalyst construction used in the motorbike etc. is comprised by supporting or bearing catalyst on an inner peripheral surface of a metallic pipe.
  • the pipe-shaped catalyst construction has simple construction, it can hardly perform the exhaust gas purification sufficiently due to small contacting area of the catalyst with the exhaust gas.
  • the catalyst has been supported on a metal foil or a metal sheet contained within a hollow portion of the pipe to broaden contacting area of the catalyst with the exhaust gas.
  • the former catalyst construction 50 shown in Fig. 5 is comprised of a cylindrical pipe 51, a metallic sheet 54 contained within the pipe 51, and catalysts (only partially shown) coated on an inner peripheral surface of the pipe 51 and an outer and on inner surfaces of the metallic sheet 54.
  • the metallic sheet 54 is continuously formed plural concaved portions 53 circumferentially by plural section V-shaped portions 52 extending outwardly and inwardly in radial direction, to resultantly have a star shape.
  • the pipe 51 and the metallic sheet 54 constructs a pipe-shaped supporting body.
  • the latter catalyst construction 60 shown in Fig. 6 is comprised of a cylindrical pipe 61 made of metal, a metallic film (foil) 62 contained within the pipe 61, and catalysts (only partially shown) 64 supported on the metallic film 62.
  • the metallic film 62 is continuously formed plural concaved portions 63 circumferentially by plural section U-shape portions, constructing a pipe-shaped supporting body together with the pipe 61.
  • a circle defined by connecting opened portions of the section V-shaped portion 52 ie top portions of the concaved portions 53 has smaller diameter, so that the opened portions extend radially near to a central portion of the pipe 51.
  • a rate of a sectional area portion where the metallic sheet 54 does not exist to whole sectional area of the pipe 51 is very small.
  • Increased contacting area of the catalyst 55 on the metallic sheet 54 with the exhaust gas improves the purifying ability of the exhaust gas.
  • the exhaust gas flows faster at a central portion of the pipe 5 with receiving small resistance than at a surrounding portion with receiving larger resistance.
  • temperature of the exhaust gas rises higher at the central portion with radiating smaller heat than the surrounding portion with radiating larger heat. Accordingly, the opened portions of the section V-shaped portion 52 located near to the central portion of the pipe 51 have been exposed in the exhaust gas of high pressure and high temperature. In this way, a part of the metallic sheet 54 may crack and damaged by pressure and heat of the exhaust gas.
  • the metallic film 63 is disposed only at a surrounding portion of a pipe 61, not being disposed at a central portion of the pipe 61. So, the metallic film 63 is hardly damaged by heat and pressure of the exhaust gas flowing at the central portion of the pipe 61.
  • rate of a surrounding sectional area where the metallic film 63 existed to a whole sectional area defined by an inner peripheral surface of the pipe 61 is very small.
  • small contacting area of the catalyst 64 of the metallic film 63 with the exhaust gas hinders sufficient exhaust gas purification.
  • the present invention has ben made in view of the above circumstances and intends to provide a pipe-shaped catalyst construction which has high catalyst ability and which is excellent in high temperature resisting character.
  • the metallic foil etc. is preferably disposed at a surrounding portion of the pipe along an inner surface thereof.
  • the inventor has found out the most suitable rate of the central sectional area portion where the metallic foil etc. is not disposed to the whole sectional area of the pipe.
  • a pipe-shaped catalyst construction for exhaust gas purification is comprised of (a) a pipe-shaped supporting body including a metallic pipe and a cylindrical metallic foil or a metallic sheet contained in the metallic pipe and provided with concaved portions formed continuously in circumferential direction to be concaved inwardly and outwardly in radial direction, and (b) a catalyst material supported at least on the metallic foil or the metallic sheet of the supporting body.
  • the metallic foil or the metallic sheet is disposed along an inner peripheral surface of the metallic pipe except for a central portion of the metallic pipe in section, and rate of a central sectional area portion where the metallic foil or the metallic sheet is not disposed to a whole sectional area of the metallic pipe defined by the inner peripheral surface of the pipe is selected to be 20 % to 60 %.
  • the metallic foil etc. is not disposed at the central portion (a cylindrical space having distance smaller than a predetermined value from a centre) of the pipe to leave a space at the central portion.
  • the metallic foil etc. is disposed at the surrounding portion of the pipe along the inner peripheral surface thereof.
  • the surrounding sectional area has the larger rate (40 % to 80 %) to the whole sectional area of the pipe. Accordingly, the exhaust gas flowing at the surrounding portion of the pipe in relatively low speed is purified by the catalyst supported on the metallic foil etc. effectively, whereby the purifying ability of the catalyst construction is maintained.
  • the catalyst construction can be used to purify the exhaust gas discharged from an internal combustion engine of a motorbike or an automobile.
  • the pipe of the pipe-shaped supporting body can be constructed using a stainless steel.
  • the pipe can have a cylindrical shape, elliptical shape or polygonal shape.
  • the metallic foil or the metallic sheet for the pipe-shaped supporting body various kinds of metals excellent in the heat resisting character can be used.
  • 20Cr-5Al is preferably used.
  • the metallic foil and the metallic foil are distinguished by thickness thereof, but this distinction is not essential since both of them are included in the present invention.
  • Each of concaved portions continuously formed on the metallic foil or the metallic sheet circumferentially can be comprised of, for example, two section U-shaped portions being adjacent and protruding outwardly in radial direction, and a connecting portion connecting them.
  • concaved portion can be formed by two adjacent section V-shaped portions protruding outwardly radially or can be formed by two adjacent section V-shaped portions protruding outwardly in radial direction and a connecting portion connecting them.
  • the rate of the central sectional area portion to the whole sectional area defined by the inner peripheral surface can be selected in a range from 20 % to 60 %, more preferably it can be selected in a range from 31 % to 52 %.
  • a rate of radius of the pipe central portion where the metallic foil etc. is not disposed (distance from a center of the cylindrical space to outer surface thereof) to radius of the pipe can be selected in range from 45 % to 77 %, more preferably it can be selected in range from 55 % to 72 %.
  • the number of the concaved portions of the metallic foil is determined depending on circumferential length of the concave portion. It does not directly affect the rate of the central sectional area portion to the whole sectional area, and therefore can be freely selected.
  • the number of the concaved portions changes size of each concaved portion. However, there is suitable size (height) of the concave portion to increase the purifying efficiency of the exhaust gas, to be explained later.
  • the concaved portions of the metallic foil etc. are joined, at the opened ends (radially outward ends) thereof, to the inner peripheral surface of the pipe.
  • cavities of the concaved portions preferably form together with the pipe flowing paths (cells) allowing the exhaust gas flow at the surrounding portion of the pipe.
  • the cells when the cells are too large due to large height of the concaved portions, the cells tend to be expanded by heat and pressure of the exhaust gas. As a result, the concaved portions may be deformed, or crack may be generated at a part of the concaved portion or at connected part between the concaved portion and the pipe.
  • oxidizing catalyst oxidizes harmful carbon monoxide and hydrocarbon in the exhaust gas to harmless carbon dioxide and steam, respectively.
  • the reducing catalyst reduces harmful nitrogen oxide to nitrogen.
  • the three-way catalyst oxidizes carbon monoxide and hydrocarbon and reduces nitrogen oxide. Using catalyst is selected in view of harmful component(s) required to be purified especially.
  • the catalyst is sufficiently supported at least on the metallic foil or the metallic sheet of the pipe-shaped supporting body, but can be supported on the pipe inner surface as occasion demands.
  • the catalyst can be supported on the inner surface and/or the outer surface of the metallic foil etc.. Supporting the catalyst on broad area of the supporting body surface is preferable to increase the purifying ability of the catalyst.
  • Part or area of the supporting body where the catalyst is supported is determined in view of the rate of the central cross-sections member to the surrounding sectional area, and the number of the concaved portions.
  • the pipe-shaped catalyst construction 10 of the embodiment 1 is shown in Figs. 1 and 2. It is comprised of a pipe-shaped supporting body including a metallic pipe 11 and a metallic foil 12, and a catalyst 19 supported on a surface of the metallic foil 12.
  • the pipe 11 made of a stainless steel has a cylindrical shape of which inner diameter is 25.4 mm, thickness is 1.2 mm and length is 170 mm, respectively. Thus, whole sectional area S1 of the pipe 11 is about 506.5 mm 2 .
  • the metallic foil 12 made of 20Cr-5Al having foil thickness of about 200 ⁇ m is formed plural recessed portion 13 circumferentially and has a cylindrical shape.
  • Each of the concaved portions 13 includes two section U-shaped potions 16 extending outwardly in radial direction and a connecting portion connecting them. All of the section U-shaped portions 14 have same construction, each including a pain of stand-up portions 14a and a top portion 14b connecting them.
  • the stand-up portion 14a has height of about 4 mm, which means distance between the connecting portions 15 opposing in diameter direction, ie diameter of the central portion 16 where the metallic foil 12 is not disposed is of about 17.4 mm. As a result, the rate of central portion diameter to the pipe diameter is of about 69 %.
  • the area of the central portion (central sectional area) S2 is of about 237.7 mm 2 , the rate to the above whole sectional area S1 of the pipe 11 being of about 47 %.
  • the surrounding sectional area portion S3 is of about 268.8 mm 2 , and has the rate to the whole sectional area S1 being of about 53 %.
  • the section U-shaped portion 14 has circumferential length smaller than distance between the adjacent section U-shaped portions 14.
  • the metallic foil 12 is joined to the inner surface of the pipe at the opened ends of each concaved portion 13 (joined portion 17), so that the pipe 11 and the concaved portions 13 form flowing passages 18 each having section trapezoidal shape at the the surrounding portion.
  • the three-way catalysts 19 are coated on inner and outer surfaces of the concaved portions 13, and on inner and outer surfaces of the connecting portions 15.
  • a pipe-shaped catalyst construction of a comparative sample 1 is comprised of a pipe similar to the pipe 11 of the embodiment 1, a metallic foil having concaved portions of which size differs from the metallic foil 12 of the embodiment 1, and a catalyst similar to the catalyst 19 of the embodiment 1.
  • Each of the concaved portions has radial height of about 8 mm, resulting in distance between the connecting portions opposed in diameter direction is of about 9.4 mm.
  • the rate of central portion diameter to the pipe diameter is of about 37 %.
  • the area of the central portion S2 is of about 69.4 mm 2 , the rate to the above whole sectional area S1 of the pipe 11 being of about 14 %.
  • rate of the surrounding sectional area portion S3 to the whole sectional area Sl is of about 86 %.
  • Another points such as the metallic foil material, the number of the concaved portions etc. are similar to the catalyst construction of the embodiment 1.
  • a pipe-shaped catalyst construction of a comparative sample 2 is comprised of a pipe similar to the pipe 11 of the embodiment 1, a metallic foil having concaved portions of which size differs from the metallic foil 12 of the embodiment 1, and a catalyst similar to the catalyst 19 of the embodiment 1.
  • Each of the concaved portions has radial height of about 2 mm, resulting in distance between the connecting portions opposed in diameter direction is of about 21.4 mm.
  • the rate of central portion diameter to the pipe diameter is of about 84 %.
  • the area of the central portion S2 is of about 359.5 mm 2 , the rate to the above whole sectional area S1 of the pipe 11 being of about 71 %. So, rate of the surrounding sectional area portion S3 to the whole sectional area S1 is of about 29 %.
  • Another points such as the metallic foil material, the number of the concaved portions etc. are similar to the catalyst construction of the embodiment 1.
  • HC purifying rate is calculated by dividing ((HC density in exhaust gas not passed thorough catalyst) - (HC density in exhaust gas passed through catalyst)) by (HC density in exhaust gas not passed through catalyst), and multiplying 100.
  • CO purifying rate is calculated by dividing ((CO density in exhaust gas not passed thorough catalyst) - (CO density in exhaust gas passed through catalyst)) by (CO density in exhaust gas not passed through catalyst), and multiplying 100.
  • the Table 2 shows shape stability character of the metallic foil which is judged by observing deformation visually.
  • “cool and heat test” is carried out by repeating heating the catalyst construction at 950 °C in 10 min. and cooling them at room temperature in 10 min. by using a 2-stroke engine.
  • HC purified rate CO purified rate Embodiment 1 45 % 58 % Comparative Sample 1 50 % 65 % Comparative Sample 2 20 % 35 %
  • the catalyst construction of the comparative sample 1 is excellent in both of the HC purifying ability and CO purifying ability, the catalyst construction of the embodiment 1 is secondary excellent, and catalyst construction of the comparative sample 2 is most poor.
  • the exhaust purifying ability depends on the rate of the surrounding sectional area portion where the metallic foil is disposed to the whole sectional area (53 % in the embodiment 1, 86 % in the comparative sample 1, and 29 % in the comparative sample 2).
  • metallic foil deformation after heat-cool test Embodiment 1 no deformation Comparative Sample 1 large deformation, partial crack Comparative Sample 2 no deformation
  • the catalyst construction of the embodiment 1 is excellent in the both aspects. To the contrary, the catalyst construction of the comparative sample 1 excellent in the catalyst ability is poor in the shape stability, while the catalyst construction in the comparative sample 2 excellent in the shape stability is poor in the catalyst ability. Judging them from totally, the catalyst construction of the embodiment 1 is most excellent.
  • size of the central portion is set extremely small by selecting the rate of radius of the central portion to radius of the pipe is 37 %, that is, by selecting the rate of the central sectional area portion to the whole sectional area is 14 %.
  • it has only the HC purifying rate and the CO purifying rate corresponding to about 1.1 times that of the catalyst construction in the embodiment 1.
  • excessive heightening of radial height (4 mm) of the concaved portion 13 does not contribute to purifying ability increase, but deteriorates the shape stability.
  • the concaved portion having height of about 5 mm seems to have the purifying ability of high level by the catalyst, and to maintain shape stability of the concaved portion.
  • the rate of radius of the central portion to radius of the pipe is 61 %, which means the rate of the central sectional area portion to the whole sectional area is 37 %.
  • both of the HC purifying rate and the CO purifying rate have been inferior to that of the catalyst construction 10 of the embodiment 1.
  • decreasing radial height (4 mm) of the concaved portion 13 greatly is not preferable.
  • the concaved portion 13 having radial height down to 3.5 mm seems to perform the equivalent purifying ability to the concaved portion having radial height of 4 mm.
  • the rate of radius of the central portion to radius of the pipe is 72 %, which means g the rate of the central sectional area portion to the whole sectional area is 52 %.
  • Value of the rate of the central portion radius to the pipe radius selected within range of 45 % to 77 %, and the value of the rate of the central sectional area portion to the whole sectional area selected within range of 20 % to 60 %, depend on shape and size of the metallic foil, shape and the number of the concaved portions, and supported area of the catalyst onto the supporting body.
  • the metallic foil 12 does not have any part located radially inside of the connecting portion 13. Therefore, there is no fear the metallic foil 12 is damaged by the exhaust gas of high temperature and high pressure flowing through the central portion of the pipe 11.
  • a pipe-shaped catalyst construction 20 of the embodiment 2 shown in Fig. 3 differs from the catalyst construction 10 of the embodiment 1 in shape of concaved portions of metallic foil.
  • each of concaved portions 23 of metallic foil 22 contained in a pipe 21 is comprised of two adjacent section V-shaped portions formed continuously in circumferential direction.
  • Each of the section V-shaped portions 24 is joined to an outer peripheral surface of a cylindrical portion 25 of the metallic foil at opened ends thereof, and joined to an inner peripheral surface of the pipe 21 at top portion thereof.
  • Sizes of the catalyst construction 20 such as inner diameter of the pipe 21 and radial height of the concaved portion 23 of the metallic foil 22 are selected same as that of the catalyst construction of the embodiment 1. Accordingly, the rate of radius of the central portion to radius of the pipe is 69 %, which means the rate of the central sectional area portion to the whole sectional area is 47 %.
  • the pipe-shaped catalyst construction 20 can render the purifying ability by the catalyst and the shaped stability of the metallic foil 22, same as the above catalyst construction of the embodiment 1.
  • a pipe-shaped catalyst construction 30 of the embodiment 3 shown in Fig. 4 differs from the catalyst construction of the embodiment 1 in shape of concaved portions of metallic foil.
  • each of concaved portions 33 of a metallic foil 32 contained in pipe 31 is comprised of two adjacent section V-shaped portions 34 each protruding outwardly in radial direction, and a connecting portion 35 disposed therebetween to connect them. That is, each section V-shaped portion 34 is comprised of a pair of stand-up portions 34a, so that the concaved portion 33 is defined by the stand-up portion 34a of the section V-shaped portion 34, the connecting portion 35 and the stand-up portion 34a of the adjacent section V-shaped portion 34.
  • Each concaved portion 33 is joined to the inner peripheral surface of the pipe at opened ends thereof, ie at a bottom portion of the section V-shaped portion 34.
  • Sizes of the catalyst construction 30 such as inner diameter of the pipe 31 and radial height of the concaved portion 33 of the metallic foil 32 are selected same as that of the catalyst construction of the embodiment 1. Accordingly, the rate of radius of the central portion to radius of the pipe is 69 %, which means the rate of the central sectional area portion to the whole sectional area is 47 %.
  • the pipe-shaped catalyst construction 30 can render the purifying ability by the catalyst and the shaped stability of the metallic foil 32, same as the above catalyst construction of the embodiment 1.
  • the present invention intends to provide a pipe-shaped catalyst construction 10 which has high catalyst ability and which is excellent in high temperature resisting character, in a pipe-shaped catalyst construction. It is comprised of a pipe-shaped supporting body including a metallic pipe 11 and a cylindrical metallic foil 12 contained therein and provided with plural concaved portions 13 formed circumferentially, and a catalyst material 19 supported on the metallic foil.
  • the metallic foil 12 is disposed along an inner peripheral surface of the pipe 11 except for a central portion of the metallic pipe in section. Also, rate of a central sectional area portion where the metallic foil 2 is not disposed to a whole sectional area of the pipe 11 defined by the inner peripheral surface of the pipe is selected to be 20 % to 60 %.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
EP00123658A 1999-11-09 2000-10-30 Rohrförmiger Katalysatorbau für die Abgasreinigung Withdrawn EP1099833A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31864099 1999-11-09
JP31864099A JP2001129407A (ja) 1999-11-09 1999-11-09 排気ガス浄化用パイプ形状触媒

Publications (2)

Publication Number Publication Date
EP1099833A2 true EP1099833A2 (de) 2001-05-16
EP1099833A3 EP1099833A3 (de) 2004-09-29

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EP00123658A Withdrawn EP1099833A3 (de) 1999-11-09 2000-10-30 Rohrförmiger Katalysatorbau für die Abgasreinigung

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EP (1) EP1099833A3 (de)
JP (1) JP2001129407A (de)
TW (1) TW558594B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009153073A1 (en) * 2008-06-18 2009-12-23 I.C.I. Caldaie S.P.A. Catalytic device
US10247079B2 (en) 2014-03-25 2019-04-02 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification system of internal combustion engine having turbocharger

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7551448B2 (ja) * 2020-10-20 2024-09-17 株式会社三井E&S 高融点配管閉塞物質の生成抑制装置及び方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551624A (en) * 1978-10-05 1980-04-15 Vdo Schindling Travelling speed adjusting device of car
JPS5551624B1 (de) 1970-11-03 1980-12-25
EP0473081A1 (de) * 1990-08-27 1992-03-04 Suzuki Kabushiki Kaisha Abgasreinigungsvorrichtung
US5110561A (en) * 1989-05-08 1992-05-05 Usui Kokusai Sangyo Kabushiki Kaisha Exhaust gas cleaning device
JPH11510872A (ja) 1995-08-16 1999-09-21 エミテツク ゲゼルシヤフト フユア エミツシオンステクノロギー ミツト ベシユレンクテル ハフツング 自動車の排気ガス内の炭化水素を減少するための触媒体

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704689A1 (de) * 1997-02-07 1998-08-13 Emitec Emissionstechnologie Wabenkörper mit im Inneren freiem Querschnittsbereich, insbesondere für Kleinmotoren

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551624B1 (de) 1970-11-03 1980-12-25
JPS5551624A (en) * 1978-10-05 1980-04-15 Vdo Schindling Travelling speed adjusting device of car
US5110561A (en) * 1989-05-08 1992-05-05 Usui Kokusai Sangyo Kabushiki Kaisha Exhaust gas cleaning device
EP0473081A1 (de) * 1990-08-27 1992-03-04 Suzuki Kabushiki Kaisha Abgasreinigungsvorrichtung
JPH11510872A (ja) 1995-08-16 1999-09-21 エミテツク ゲゼルシヤフト フユア エミツシオンステクノロギー ミツト ベシユレンクテル ハフツング 自動車の排気ガス内の炭化水素を減少するための触媒体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009153073A1 (en) * 2008-06-18 2009-12-23 I.C.I. Caldaie S.P.A. Catalytic device
US10247079B2 (en) 2014-03-25 2019-04-02 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification system of internal combustion engine having turbocharger

Also Published As

Publication number Publication date
JP2001129407A (ja) 2001-05-15
EP1099833A3 (de) 2004-09-29
TW558594B (en) 2003-10-21

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