US3811845A - Vehicle exhaust control equipment - Google Patents

Vehicle exhaust control equipment Download PDF

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Publication number
US3811845A
US3811845A US00163939A US16393971A US3811845A US 3811845 A US3811845 A US 3811845A US 00163939 A US00163939 A US 00163939A US 16393971 A US16393971 A US 16393971A US 3811845 A US3811845 A US 3811845A
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United States
Prior art keywords
catalysts
control equipment
casing
catalyst
exhaust
Prior art date
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Expired - Lifetime
Application number
US00163939A
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English (en)
Inventor
H Nakamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Priority claimed from JP3207671A external-priority patent/JPS5214371B1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to US412961A priority Critical patent/US3897366A/en
Application granted granted Critical
Publication of US3811845A publication Critical patent/US3811845A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2846—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for granular supports, e.g. pellets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/864—Removing carbon monoxide or hydrocarbons
    • 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
    • F01N3/2832—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support granular, e.g. pellets
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/08—Granular material
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the present invention relates to generally an atmospheric pollution control equipment and more particularly a vehicle exhaust control equipment.
  • One of the objects of the present invention is to provide an improved vehicle exhaust control equipment of the type using the catalysts to convert the pollutants such as. carbon monoxide, unburnt hydrocabons and nitrogen oxides in the exhaust gases from an automobile engine into harmless gases.
  • Another object of the present invention is to provide an improved vehicle exhaust control equipment which is very effective in eliminating the pollutants in the exhaust gases for the purpose of atmospheric pollution control.
  • Another objectof the presentinvention is to provide an improved vehicle exhaust control equipment which may effectively dissipate the heat produced in the catalytic oxidations so that the'thermal breakdowns of the catalysts may be prevented and the long service life of the equipment may be ensured.
  • Another object of the present invention is to provide an improvedvehicle exhaust control equipment which may be manufactured in a simple manner at less cost.
  • the small catalyst chambers are of box-shaped and disposed on both sides of an exhaust gas introduction passage connected to an inlet of the casing.
  • the equipment has a cylindricalcasing which is di-* vided into more than two small catalyst chambers by a plurality of doughnut-shaped partition walls, and the mesh-like catalystsare wound around the exhaust gas introduction passage.
  • the last of the plurality of partition disks has no center aperture so as 'to close the exhaust gas introduction passage, and the last chamber defined between this last partition disk and the side wall on the side of the discharge end ofthe cylinder is not packed with the mesh-like catalysts and is used as a chamber for discharging the exhaust gases, which have been made in contact with the mesh-like catalysts, into a discharge pipe connected to a muffler or the like.
  • the exhaust gas introduction passage is gradually reduced in cross. section toward the discharge end of the casing.
  • FIG. 1 is a block diagram of a system for cleaning or purifying the exhaust gases from an automobile engine
  • FIG. 2 is a diagrammatic sectional view of the prior art vehicle exhaust control equipment designated by 2 in FIG. 1;
  • FIG. 3a is a diagrammatic longitudinal sectional view of another prior type vehicle exhaust control equipment
  • FIG. 3b is a cross sectional view thereof
  • FIG. 4a is a diagrammatic longitudinal sectional view of a first embodiment of the present invention.
  • FIG. 4b is a perspective view thereof with a top cover removed
  • FIG. 5 is a diagrammatic longitudinal sectional view of a second and fourth embodiments of the present invention.
  • FIG. 6 is a diagrammatic longitudinal view of a third and fifth embodiments of the present invention.
  • FIG. 7a is a diagrammatic longitudinal sectional view of a sixth embodiment of the present invention.
  • FIG. 7b is a perspective view thereof with a part of the casing wall being broken away.
  • FIG. 1 is shown in block diagram the prior art vehicle exhaust control equipment for eliminating or purifying the pollutants included in the vehicle exhaust gases.
  • the exhaust gases from an automobile engine 1 is introduced through an exhaust pipe into an exhaust control equipment 2, where the exhaust gases are purified.
  • the purified gases are introduced into a muffler 3 where the sound of the gases is attenuated and the temperature of the gases is reduced, andthe exhaust gases are finally discharged into the surrounding atmosphere through an exhaust pipe 4.
  • FIG. 2 is shown in section the exhaust control equipment 2 comprising a box-shaped casing 15 with a volume of 4 5 liters and a connecting pipe 11 connected to the manifold of the automobile engine and a connecting pipe 12 connected to the muffler.
  • a pair of spaced-apart perforated metal plates or screens 14 are disposed in the casing 15 to define a space of one or two liters in which the catalysts are packed.
  • the catalysts generally comprise the very porous carriers consisting of the particles of alumina, silica or magnesia which are sintered at elevated temperatures and coated or mixed with platinum and the metal oxides such as copper, nickel, manganese, cobalt and iron oxides.
  • the carriers of these catalysts comprise the mesh fabrics of glass fibers or glass fiber fabrics (to be referred to as heat-resisting glass fiber fabrics hereinafter) of the type in which all of alkalines in glass fibers are eliminated by dipping these glass fibers in a strong acid bath whereby they may become rich with silica and may be rendered heat resistive with an increased activated surface area.
  • platinum or the above described metal oxides To these carriers is applied platinum or the above described metal oxides. Therefore the problem is now how to provide an effective exhaust control equipment with the use of these mesh fabrics of glass fibers or heat-resisting glass fibers.
  • FIGS. 3a and 3b One arrangement of the priorart exhaust control equipment is illustrated in FIGS. 3a and 3b.
  • a perforated pipe 34 with a perforated area being 20-50 percent of the total surface area.
  • One end of the perforated pipe 34 is connected to the feed pipe 32 while the other end is closed by a plug or the like.
  • the mesh-fabric type catalysts 35 of the type described above are wound around the perforated pipe 34 coaxially thereof. The weight of these catalysts is about 400-800 grams.
  • the exhaust gases fed through the feed pipe 32 into the perforated pipe 34 are discharged through the perforations thereof, made into contact with the catalysts 35 and discharged into the discharge pipe 33.
  • the inventors made extensive studies and experiments in order to make full use of the catalysts in the reactions within the casing and also to prevent the temperature of the catalysts from being elevated by the heat dissipated from the exhaust gases, and succeeded in providing an excellent vehicle exhaust control equipment as will be described hereinafter with reference to FIGS. 4-7.
  • FIG. 4 A first embodiment is shown in FIG. 4.
  • a boxshaped casing 43 Within a boxshaped casing 43 are disposed in parallel a plurality of small-sized chambers or units of the mesh-fabric type catalysts 47 of the type described, the adjacent catalyst units 47 being separated from each other by means of partition walls 44. These catalyst units 47 are sandwiched between a pair of perforated metal plates or wire screens 48 and 49.
  • the axis of each of the rolled catalyst units 47 may be in parallel with the direction of the flow of the exhausted gases or the axis of the rolled catalyst unit 47 may be perpendicular to the direction of the exhaust gas flow so that the outer surface of the rolled catalyst unit 47 may be perpendicular to the axis of the passage 45.
  • a number of the rolled catalyst units 47 is dependent upon the types of automotive engines, and is preferably 28.
  • FIG. 5 A second embodiment of the present invention is shown in FIG. 5.
  • a plurality of rolled catalysts units 58 similar to those 47 in the first embodiment described by reference to FIG. 4 are disposed in parallel on each side of an exhaust gas introduction passage 56 in communication with a feed pipe 51 of a box-shaped casing 53.
  • the exhaust gases which have made contact with the catalysts 58 are discharged through the exhaust gas passages 57 into the discharge pipes-52 and 52 which are connected to a single pipe connectedto a muffler.
  • the catalyst units 58 are sandwiched by a pair of perforated metal plates or wire screens 54 and 55 and are separated from each other by partition walls 59.
  • a third embodiment shown in FIG. 6 is similar to the second embodiment described above by reference to FIG. except that the cross sectional area of the central exhaust gas passage is gradually reduced from a feed pipe 61 toward the rear side of a box-shaped casing 63 on the side of its discharge pipes 62 and 62 which are also connected to a single pipe connected to a muffler.
  • the catalyst units 67 are also sandwitched between the perforated metal plates or wire screens 64 and 65 and are separated from each other by the partition walls 68.
  • a fourth embodiment of the present invention will be described by reference to FIG. 5 because its longitudinal sectional view is substantially similar to that of the second embodiment.
  • the fourth embodiment has a cylindrical casing 53 about 230 mm in diameter, and
  • the mesh fabric type catalysts 58 of the type described above are wound around a perforated pipe 54 within the casing 53 connected to the feed pipe 51.
  • the exhausted gases are discharged into the discharge pipes 52 and 52' from the cylindrical casing 53.
  • a fifth embodiment of the present invention will be described by reference to FIG. 6 because its longitudinal sectional view is substantially similar to that of the third embodiment.
  • the third embodiment has a box-shaped casing
  • the fifth embodiment has a cylindrical casing 63.
  • the diameter of the passage is gradually reduced as in the case of the third embodiment.
  • Each catalyst unit 67 and each partition wall are both in the form of a doughnut.
  • the space of the catalyst unit is increased as it approaches toward the discharge end of the casing, but the purpose of the gradually reduced-diameter passage at the center of the casing is to prevent the exhaust gases deflected at the rear end of the passage from entering in large quantity into the last catalyst unit or units as compared with the exhaust gases which enter into the preceding units.
  • the density of the catalysts in the last unit or units is preferably reduced.
  • the ratio of the weight of the catalysts in the first unit to that of the last unit is preferably 1.45:1 while in the fifth embodiment where six disk-shaped catalyst units are disposed, the ratio is preferably 1.35:].
  • a cylindrical casing 73 has a feed pipe 71 and a discharge pipe 72, and mesh-fabric type catalysts 77 of the type described above are wound around a perforated pipe 78 in the casing 73 and are separated from each other by partition disks 70.
  • the last partition disk 74 closes the perforated pipe 78 so that the exhausted gases will be prevented from directly passing into the discharge pipe 72 without passing through the catalyst units 77.
  • Another perforated pipe 75' is disposed between the last partition disk 74 and the discharge pipe 72 so that the exhaust gases which passed through the catalyst units 77 may enter into the perforated pipe 75 before they are discharged into the discharge pipe 72.
  • the weight of the catalysts in each unit is grams so that the total weight of the catalysts in four units is 480 grams.
  • the exhaust gases introduced into the perforated pipe 78 through the feed pipe 71 are made to pass through the catalyst units 77 and then discharged into a muffler through the perforated pipe 75 and the discharge pipe 72.
  • an air pump or air blower which is driven by the automobile engine or the battery to feed the air into the exhaust control equipment in order to oxide CO, HC and the like in the exhaust gases which are not completely burnt in the engine, because such an air pump or blower is well known in the art and is required not only 2.
  • the partition walls or disks By use of the partition walls or disks, the uniform temperature rise in the equipment may be attained. Furthermore, the temperature rise may be minimized. The reason is that the partition walls or disks are made in the vehicle exhaust gas control equipment of the 5 of metal and are placed adjacent to the heating catapresent invention but also in other prior art equiplysts so that the heat dissipation by the metal partition ments.
  • the exhaust gas art to provide, depending upon the characteristics of passage is gradually reduced in diameter from the feedthe catalysts used, heat dissipating means when the exing end toward the discharge end so that the volumes haust control equipment is used under some special e of the exhaust gases introduced into individual catalyst vironmental conditions or when the heat resistivity of units or chambers may be uniformly distributed.
  • the catalysts is low. fore the temperature rises in the catalyst units may be The following advantages ar accrued fr th pr made uniform and the local thermal breakdowns of the ent invention: catalysts may be effectively prevented. l.
  • a plurality of small-sized catalyst units are disposed the f Y fifth and SiXth embodiment, h y in parallel so that the cleaning or purification effect e g are p y so that the fabrleatleh may be much improved as compared with the prior art be mphfied at ess cost.
  • exhaust eohtro] equipment In which the catalysts of the present invention will become e Welght are PhleecI ehe pesltloht Thls advahtage more apparent from the data given in Table 11 below.
  • the cataone space as compared with the exhaust control equ1plysts used are as f ll mentof the presentmventlon in wh ch these catalystS Carriers: mesh-fabrics of heat-resisting glass fibers are l "h uhlts each cohtammg 60400 grams
  • Catalysts metal oxides whose major portions are coahd dlsposed patahet other words, y the Pttmhel 4O balt oxides and copper oxides and which contain as arrangement of the small-sized catalyst units, the clea auxiliary catalysts small quantities of chromium oxing or purification effect may be much improved while ides, aluminum oxides, magnesium Oxides and the exhaust control equipment may be made compact phosphorus in size.
  • the types and weights of the catalysts are of course selected depending upon the types of the automobiles and that the catalysts may be of the type in which platinum or metal oxides are applied as the catalyst layers upon the surfaces of the fabrics woven from the heat-resisting glass fibers. It is also understood that the gradual reduction in diameter of the perforated pipe 78 in the sixth embodiment is also within the scope of the present invention.
  • the vehicle exhaust control equipment in accordance with the present invention may be fabricated at less cost and has an excellent exhaust gas cleaning or purification effect, and is very effective as an anti-atmospheric-pollution control equipment.
  • a vehicle exhaust control device capable of dissipating the heat produced during catalytic oxidation of exhaust gases without thermal breakdown comprising in combination an outer casing having gaseous feed means and discharge means,

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Exhaust Silencers (AREA)
  • Catalysts (AREA)
US00163939A 1970-07-30 1971-07-19 Vehicle exhaust control equipment Expired - Lifetime US3811845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US412961A US3897366A (en) 1970-07-30 1973-11-05 Automotive exhaust gas catalyst

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6714770 1970-07-30
JP6714670 1970-07-30
JP3207671A JPS5214371B1 (fr) 1971-05-12 1971-05-12

Publications (1)

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US3811845A true US3811845A (en) 1974-05-21

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US00163939A Expired - Lifetime US3811845A (en) 1970-07-30 1971-07-19 Vehicle exhaust control equipment

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US (1) US3811845A (fr)
CA (1) CA945767A (fr)
DE (1) DE2137818C3 (fr)
FR (1) FR2099370A5 (fr)
GB (1) GB1355685A (fr)
NL (1) NL150193B (fr)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996016A (en) * 1975-12-29 1976-12-07 Uop Inc. Variable capacity catalytic converter
US4039291A (en) * 1974-03-27 1977-08-02 Regie Nationale Des Usines Renault Internal combustion engine catalytic anti-pollution reactor
US4175107A (en) * 1974-09-03 1979-11-20 Matsushita Electric Industrial Co., Ltd. Catalytic exhaust gas purifying device
WO1980000125A1 (fr) * 1978-05-26 1980-02-07 Caterpillar Tractor Co Reacteur catalytique a multi etage
US4220625A (en) * 1976-10-20 1980-09-02 Matsushita Electric Industrial Co., Ltd. Exhaust gas control equipment
EP0044398A1 (fr) * 1980-07-19 1982-01-27 KNECHT Filterwerke GmbH Filtre des gaz d'échappement d'un moteur à combustion
US4794226A (en) * 1983-05-26 1988-12-27 Metcal, Inc. Self-regulating porous heater device
US4894074A (en) * 1987-11-18 1990-01-16 Swiss Aluminium Ltd. Filter for cleaning exhaust gases of diesel engines
DE3823550A1 (de) * 1988-07-12 1990-01-18 Bayerische Motoren Werke Ag Fahrzeug-abgasanlage mit einem katalysatorkoerper
DE3831468A1 (de) * 1988-09-16 1990-03-22 Messerschmitt Boelkow Blohm Segelyacht
US4913712A (en) * 1987-11-18 1990-04-03 Swiss Aluminium Ltd. Filter for cleaning exhaust gases of diesel engines
US5073625A (en) * 1983-05-26 1991-12-17 Metcal, Inc. Self-regulating porous heating device
GB2249039A (en) * 1990-10-23 1992-04-29 Kevin John Rushbrook Exhaust gas treatment
US5141714A (en) * 1989-08-01 1992-08-25 Kabushiki Kaisha Riken Exhaust gas cleaner
US5223009A (en) * 1991-09-11 1993-06-29 Mercedes-Benz A.G. Exhaust gas equipment for an internal combustion engine
US5279630A (en) * 1992-01-03 1994-01-18 Ernst-Apparatebau Gmbh & Co. Soot filter for diesel engines
US5531968A (en) * 1993-06-04 1996-07-02 Scambia Industrial Developments Ag Catalytic converter for the catalytic treatment of exhaust gas
US5567392A (en) * 1993-06-28 1996-10-22 Mannesmann Aktiengesellschaft Device for the purification of contaminated exhaust air through heterogeneous catalysis
US5575980A (en) * 1995-08-14 1996-11-19 General Motors Corporation Valved radial flow catalytic converter
US5902558A (en) * 1994-09-26 1999-05-11 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Diskwise-constructed honeycomb body, in particular catalyst carrier body and apparatus for catalytic conversion of exhaust gases
US6089346A (en) * 1999-06-02 2000-07-18 3M Innovative Properties Company Muffler with acoustic barrier material for limited clearance pneumatic device applications
US6093015A (en) * 1999-01-11 2000-07-25 D-M-E Company Mold core positioning device
US6202785B1 (en) 1999-06-02 2001-03-20 3M Innovative Properties Company Muffler with acoustic absorption insert for limited clearance pneumatic device applications
US6250075B1 (en) * 1998-06-30 2001-06-26 Shin-Daiwa Kogyo Co., Ltd. Engine muffler
US20020094312A1 (en) * 2001-01-12 2002-07-18 Hanus Gary J. Electrically-heated chemical process reactor
US20070119433A1 (en) * 2005-11-30 2007-05-31 Popik Janusz Device for exhaust gas purification for spark-ignited engines
US20100148121A1 (en) * 2008-12-17 2010-06-17 Uop Llc Reactor employing catalysts upon or within a cloth-like material
US20100150805A1 (en) * 2008-12-17 2010-06-17 Uop Llc Highly stable and refractory materials used as catalyst supports
US8883108B2 (en) 2008-12-17 2014-11-11 Uop Llc Catalyst supports
US20220010716A1 (en) * 2016-08-19 2022-01-13 Kohler Co. System and method for low co emission engine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744020A1 (de) * 1987-12-24 1989-07-06 Sotralentz Sa Vorrichtung fuer die katalytische behandlung der verbrennungsabgase eines kraftfahrzeugmotors und verfahren zur herstellung einer katalysatorpatrone fuer eine solche vorrichtung
DE4322037A1 (de) * 1993-07-02 1995-01-26 Bischoff Erhardt Gmbh Co Kg Katalysator für Verbrennungsmotore
US5388407A (en) * 1994-07-05 1995-02-14 Ford Motor Company Exhaust manifold catalyst and muffler for automotive engine
DE4431134C2 (de) * 1994-09-01 1997-03-06 Himmelsbach Johann Vorrichtung zur Verbesserung der Temperaturbeständigkeit von Katalysatoren für Verbrennungskraftmaschinen

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039291A (en) * 1974-03-27 1977-08-02 Regie Nationale Des Usines Renault Internal combustion engine catalytic anti-pollution reactor
US4175107A (en) * 1974-09-03 1979-11-20 Matsushita Electric Industrial Co., Ltd. Catalytic exhaust gas purifying device
US3996016A (en) * 1975-12-29 1976-12-07 Uop Inc. Variable capacity catalytic converter
US4220625A (en) * 1976-10-20 1980-09-02 Matsushita Electric Industrial Co., Ltd. Exhaust gas control equipment
WO1980000125A1 (fr) * 1978-05-26 1980-02-07 Caterpillar Tractor Co Reacteur catalytique a multi etage
US4196170A (en) * 1978-05-26 1980-04-01 Caterpillar Tractor Co. Multistage catalytic reactor having a pressure responsive gas flow control valve therein
EP0044398A1 (fr) * 1980-07-19 1982-01-27 KNECHT Filterwerke GmbH Filtre des gaz d'échappement d'un moteur à combustion
US4466817A (en) * 1980-07-19 1984-08-21 Knecht Filterwerke Gmbh Exhaust gas separator
US4794226A (en) * 1983-05-26 1988-12-27 Metcal, Inc. Self-regulating porous heater device
US5073625A (en) * 1983-05-26 1991-12-17 Metcal, Inc. Self-regulating porous heating device
US4894074A (en) * 1987-11-18 1990-01-16 Swiss Aluminium Ltd. Filter for cleaning exhaust gases of diesel engines
US4913712A (en) * 1987-11-18 1990-04-03 Swiss Aluminium Ltd. Filter for cleaning exhaust gases of diesel engines
US4924570A (en) * 1987-11-18 1990-05-15 Swiss Aluminium Ltd. Filter for cleaning exhaust gases of diesel engines
DE3823550A1 (de) * 1988-07-12 1990-01-18 Bayerische Motoren Werke Ag Fahrzeug-abgasanlage mit einem katalysatorkoerper
DE3831468A1 (de) * 1988-09-16 1990-03-22 Messerschmitt Boelkow Blohm Segelyacht
US5141714A (en) * 1989-08-01 1992-08-25 Kabushiki Kaisha Riken Exhaust gas cleaner
GB2249039A (en) * 1990-10-23 1992-04-29 Kevin John Rushbrook Exhaust gas treatment
GB2249039B (en) * 1990-10-23 1995-01-11 Kevin John Rushbrook Serviceable waste exhaust gas convertor
US5223009A (en) * 1991-09-11 1993-06-29 Mercedes-Benz A.G. Exhaust gas equipment for an internal combustion engine
US5279630A (en) * 1992-01-03 1994-01-18 Ernst-Apparatebau Gmbh & Co. Soot filter for diesel engines
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Also Published As

Publication number Publication date
NL150193B (nl) 1976-07-15
GB1355685A (en) 1974-06-05
NL7110466A (fr) 1972-02-01
DE2137818A1 (de) 1972-02-03
FR2099370A5 (fr) 1972-03-10
DE2137818C3 (de) 1980-06-19
DE2137818B2 (de) 1979-10-11
CA945767A (en) 1974-04-23

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