US3927984A - Catalytic converter bed support means - Google Patents

Catalytic converter bed support means Download PDF

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Publication number
US3927984A
US3927984A US422699A US42269973A US3927984A US 3927984 A US3927984 A US 3927984A US 422699 A US422699 A US 422699A US 42269973 A US42269973 A US 42269973A US 3927984 A US3927984 A US 3927984A
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United States
Prior art keywords
catalyst
retaining
retaining plate
plates
support
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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.)
Expired - Lifetime
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US422699A
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English (en)
Inventor
Frederick J Hartley
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.)
Motors Liquidation Co
Original Assignee
General Motors Corp
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Filing date
Publication date
Application filed by General Motors Corp filed Critical General Motors Corp
Priority to US422699A priority Critical patent/US3927984A/en
Priority to JP14110174A priority patent/JPS5419934B2/ja
Priority to CA215,676A priority patent/CA1005995A/en
Application granted granted Critical
Publication of US3927984A publication Critical patent/US3927984A/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
    • 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
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features having thermal insulation
    • 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

Definitions

  • ABSTRACT A low profile catalytic converter made of sheet metal wherein catalyst material is contained in a space between top and bottom catalyst retaining plates which in turn are located between top and bottom shells to define a structure wherein engine exhaust gases entering at one end of the converter pass through the catalyst material and exit at the opposite end. Sagging of the bottom catalyst retaining plate is avoided by one or more elongated support channels each having a web in face-to-face supporting relation to the bottom shell and upstanding longitudinal sides which fit against and support the bottom catalyst retaining plate at a series of spaced points along their lengths.
  • Each support channel includes a web that is struck upwardly to define a pair of fiat portions that fit against and are welded to the bottom catalyst retaining plate, one of these flat portions has fore and aft rigidity while the other has fore and afi flexibility, so that the welds do not break under the temperature gradients and varying thermal expansion conditions of the converter, when used.
  • the converter as used and disclosed is light enough to be supported by the exhaust system and is designed to resist deformation such as bulging of the outside members as well as bulging of the bottom catalyst retaining plate, which results from the combined effect of the weight of the pellets and the elevated operating temperatures of the converter which temperatures can rise to and above about I600F. It is contemplated that the converter will be filled with a catalyst material formed as beads or slugs, and it is therefore a requirement that the catalyst bed be kept as tightly packed as possible during operation to prevent attrition of the catalyst generally brought about by the breaking up of the pellets from both road vibration and fluidization of the catalyst bed by the exhaust gases flowing therethrough. It is a further requirement that the flow of gases through the catalyst bed be substantially uniformly distributed throughout the bed for maximum catalyst life and optimum conversion. Additionally, the flow of gases through the outlet of the converter must not be impeded to assure maximum flow and preclude any back pressure through the exhaust system.
  • FIG. I is a side elevational view of a catalytic converter with attached exhaust inlet and outlet pipes.
  • FIG. 2 is a horizontal cross sectional view from the bottom of the converter on line 22 of FIG. 1 showing the bottom catalyst retaining plate having the support members positioned thereon.
  • FIG. 3 is a cross sectional view taken along line 3-3 of FIG. 2.
  • FIG. 4 is a cross sectional view taken along line 4-4 of FIG. 1.
  • FIG. 5 is an enlarged portion of FIG. 3 showing the rear channel support tab.
  • FIG. 6 is a view in perspective of a support channel element constructed in accordance with the present invention.
  • FIG. 7 is an enlarged portion of FIG. 3 showing the forward channel support tab.
  • FIG. 8 is a view like FIG. 2 of an alternative embodiment of the present invention.
  • the catalytic converter assembly or housing 10 as shown in FIGS. I 4 includes a dished top housing plate or shell 12 and a bottom dished housing plate or shell 14 having side wall portions 16 and 18, respectively, FIG. 4, with peripheral flange portions 20, 22, respectively, extending outwardly therefrom substantially about the entire periphery in mating relation to each other.
  • an inclined catalyst retaining element 24 which includes a dished top plate 26 that has a top portion 30 located below and spaced from the top housing plate or shell l2 and having a plurality of regularly spaced perforations or louvers 32 therethrough.
  • the louvers are formed by pierced straplike sections of the plate 26 which are bent upwardly as shown to form side-facing openings for gas flow.
  • the dished bottom plate 28 includes a bottom portion 34 spaced from the bottom housing plate or shell 14 that also has a plurality of similar regularly spaced perforations or louvers 36 therethrough.
  • Catalyst retaining element 24 also includes gas impervious sidewall portions 38 and 40, respectively, spaced from the sidewall portions 16 and 18 of the housing 10 and having mating peripheral flange portions 42 and 44 extending therefrom. These flange portions are sandwiched between the peripheral flange portions 20 and 22 of the shells I2 and 14, as shown. Catalyst retaining plates 26 and 28 thus define a catalyst retaining space 46 of substantially uniform depth between plates 26 and 28. As seen in FIG. 3 the distance of plate 26 from the housing plate or shell 12 progressively decreases from left to right so as to form a progressively decreased cross section for incoming exhaust gas flow.
  • the distance between plate 28 and shell 14 progressively increases from left to right so as to provide a progressively increased cross section for outflow of the exhaust gases.
  • the space between catalyst retaining plate 28 and shell 14 should remain as unobstructed to gas flow as possible to provide for an unimpeded outflow of exhaust gas.
  • Space 46 is filled with a desired catalyst material 48 of the pellet type with the catalyst material being tightly packed within the space to provide a compact uniform catalyst bed.
  • the mating peripheral flange portions 42 and 44 of the catalyst element 24 are disposed between the peripheral flange portions and 22 of the housing 10 to form a four layer assembly suitable for edge sealing by means of an external weld 50. in this manner an absolute internal and external seal is provided with the catalyst element 24 mounted and supported within housing 10 and separating an inlet plenum chamber 57 from an outlet plenum chamber 59.
  • the flange portions of housing 10 and catalyst retaining element 24 define an exhaust gas inlet 56 and an exhaust gas outlet 58 in combination with the housing 10.
  • the inlet and outlet are adapted to receive extensions 60, 62, respectively, that can be sealingly joined to the exhaust pipe system of an automobile.
  • connections can be varied, depending on the location of the converter in relation to the exhaust pipe system on the respective automobile on which it is used.
  • a plurality of support studs 100 having shoulders thereon are placed between the top and bottom catalyst retaining plates, with a smaller portion of the studs extending through the top and bottom plates.
  • a plurality of washers 102 are placed over the support studs, and welded in place to retain the high structural integrity that resists deformation and adds strength to the converter.
  • the catalytic converter thus described has an inclined catalyst bed sloping upwardly from the converter inlet 56 to the converter outlet 58 wherein the exhaust gases entering the converter through the inlet 56 pass through the upper catalyst retaining plate 26 down through the catalyst material 48 and out through the lower catalyst retaining plate 28. Due to the heat present in the converter and the weight of the catalyst on the bottom catalyst retaining plate 28, the bottom catalyst retaining plate may tend to sag in the areas between support studs 100. If the bottom retaining plate sags it closes off or impedes the flow of exhaust gases from the converter through the exhaust outlet 58 thereby creating a back pressure in the engine exhaust system.
  • a plurality of channels 72 and 74 are attached to the bottom catalyst retaining plate prior to final assembly by means of welding or the like, which, after assembly, are held away from the bottom shell member a minimum distance so that they will not interfere in assembly and in getting a tight outer seam weld.
  • each of the channels there are two support channels 72 that are identical in configuration and are located approximately midway between support studs 100 and each side of catalyst retaining element 24 on the bottom catalyst retaining plate 28.
  • the support channel includes a main elongated flat web section 73 and two upstanding ribs or side walls 78, 79 on the longitudinal sides thereof.
  • Each of the ribs has a plurality of serrations or cutout sections 80 along the outer edges 76, 77 and a plurality of flat sections 82 that join the cutout or serrated sections along the same outer edges, the flat sections defining a sloping plane in relation to the flat section 73 so as to span the vertical space between the bottom plate 34 and the bottom shell 14 as shown in FIG. 3.
  • the serrations are placed adjacent a row of perforations or louvers 36 and are in alignment with and correspond to the perforations to permit the exhaust gases to flow without blockage out of the perforations and through the channel itself to thereby achieve substantially the same basic flow area as that available without the support channels.
  • the channels are formed and sized so there is very little if any impedance of exhaust gas flow.
  • the flat sections 82 that join the serrations or cutout portions in the channels mate with or seat on the flat sections 84 between the perforations 36 to provide a greater area of support to the bottom catalyst retaining plate. Cutout sections 94 and 96 on channel 72 are larger than the other similar sections because of a manufacturing requirement for die relief.
  • the channel 72 is distorted at these sections during the forming operation when the tabs 90, 92, hereinafter described, are formed, whereby in forming the tabs the forming operation pushes the metal outward at sections 94, 96 to effectively make the support channel thicker in these sections with the result that the channel will not fit flat on the bottom catalyst retaining plate 28 due to the distortion at sections 94, 96 which could then prevent the peripheral flange 22 on bottom shell 14 from being drawn against flange 44 to thereby create an assembly problem.
  • Channels 72 and 74 are tapered at the same angle as the angle of incline of the catalyst bed and are therefore deeper at one end 86 than at the opposite end 88.
  • the support channel also has a pair of struckout portions or tabs 90 and 92 that have bottom webs or legs 91, 93 respectively thereon that are located in the same plane as that of the outer edges 76, 77 of the channel, which tabs are used to locate and secure the support channels on the bottom catalyst retaining plate 28.
  • Tab 90 generally bridge shaped, has a pair of side portions 95 attached to web 91, and ribs 78, 79 to add strength and rigidity to the support channel.
  • Tab 92 is generally formed as an L-shaped member having no side supports and having a web 93 struck upwardly adjacent the upstream end of the converter to define a flat face and a second upstanding web 89 that has longitudinal flexibility.
  • Tab 90 when welded to the bottom catalyst retaining plate will remain rigid and will prevent the support channel from moving while tab 92 having flexibility will permit the support channel to move fore and aft on expansion and contraction relative the bottom catalyst retaining plate due to heating and cooling of the converter.
  • Tab 92 therefore flexes as at 101, H6. 7, which flexure assures that the welds will not break due to the expansion and contraction of the converter assembly.
  • FIGS. 5 and 7. A clearance is provided between the bottom shell 14 and the main flat section 73 of the support channel, to assure that when the outer peripheral flanges 20, 22 of the upper and lower shells, and the flanges 42, 44 of the catalyst retaining means are placed together for welding, these flanges will mate and that there will be no displacement due to the use of the support members 72 on the bottom catalyst retaining plate.
  • the clearance is minimal and will vary due to tolerance stack up, but there should be only enough clearance to allow for the flanges to mate without interference to get a good seam weld. in use, the clearance could disappear and the channel would therefore also be supported by the bottom shell 14.
  • These members of the converter are then welded at 50 to provide an integral internal and external seal as has been previously described.
  • An insulating means 104 is placed on the top, and if desired may be placed on the bottom, of the converter and an outer covering or shell 106 is placed over the insulating material to protect it from the elements.
  • FIG. 8 shows a smaller converter than that shown in FIG. 2 which requires only two long support channels 108 and a shorter support channel 110 adjacent the outlet opening of the converter.
  • the rear tab 92 on the channel is the same as that shown at 92 in FIG. 6 while the front tab 1 11 though formed the same as tab 90 and for the same reasons, is located at the rear edge of the bottom catalyst retaining plate.
  • the support channel 110 is smaller than the center support channel shown on the converter of FIG. 2 since the two support studs are located along the center line and are sufficient to support the center of bottom plate 28 and to retain the upper and lower shells of smaller housing together. I have found it preferable to provide some support at this rearward location since this is the center of the bottom catalyst support retaining member 28 where sagging could occur. No support is needed at the front of bottom catalyst retaining plate at the inlet end since this is a small area and no significant impedance in the exhaust flow would occur due to sag in this area.
  • the support channel 72 defines, along its length, a cross sectional area of increasing size, just as does the space between the bottom catalyst retaining member 28 and the bottom shell 14, FIG. 3. Accordingly, the channel tends to carry substantially the same gas flow as would occur in its absence, and the resistance to gas flow through the converter is not substantially affected by the presence of the channel.
  • the upstanding portion 89, FIG. 6, upon which welding tab 92 is located is at the upstream end of the channel, thus reducing the effect of the obstruction to flow that this upstanding portion necessarily creates. Further, the relieved portions 96 of the channel sides adjacent this upstanding portion 89 permit some lateral gas flow around the upstanding portion 89.
  • the welding tab 90 on the downstream end of the channel is formed of a bridge-like arrangement wherein only the thickness of the support is in the way of gas flow. Also, tab 90 is formed at the downstream end, to provide the maximum support area on the channel, at the widest section on the downstream side of the converter.
  • a low profile catalytic converter assembly for the treatment of exhaust gas of the type having dished top and bottom housing plates with side wall portions and peripheral flange portions extending outwardly therefrom, a dished catalyst retaining element including top and bottom catalyst retaining plates with peripheral flange portions extending between the flange portions of said top and bottom housing plates for support of said retaining element, an exhaust gas inlet at one end of said assembly and an exhaust gas outlet at the other end of said assembly formed between said peripheral flange portions, a compact bed of catalytic material filling said dished catalyst retaining element in the space between said top and bottom catalyst retaining plates, said retaining plates sloping relative to said housing plates so that the flow area between the upper housing plate and the upper retaining plate decreases as the flow distance from said inlet to said outlet decreases, support studs extending between said top and bottom housing plates and through said top and bottom retaining plates and being anchored to the top and bottom housing plates, the improvement comprising a plurality of elongated channel supports secured
  • a dished catalytic retaining element including top and bottom catalyst retaining plates with pe ripheral flange portions extending between the flange portions of said top and bottom housing plates for support of said retaining element, an exhaust gas inlet at one end of said assembly and an exhaust gas outlet at the other end of said assembly formed between said peripheral flange portions, a compact bed of catalytic material filling said dished catalyst-retaining element in the space between said top and bottom catalyst retaining plates, said retaining plates sloping relative to said housing plates so that the flow area between the upper housing plate and the upper retaining plate decreases as the flow distance from said inlet to said outlet increases, said top and bottom catalyst retaining plates having a plurality of perforations therethrough to permit the flow of exhaust gases between said inlet and outlet through the top retaining plate, the catalytic material and the bottom
  • a low profile catalytic converter assembly for the treatment of exhaust gas of the type having top and bottom cuplike housing shells with side wall portions and peripheral flange portions extending outwardly therefrom, an exhaust gas inlet at one end of the said assembly and an exhaust gas outlet at the other end of said assembly formed between said peripheral flange portions, dished upper and lower catalyst retaining plates forming a catalyst retaining element, said retaining plates sloping relative to said housing shells so that the flow area between the top housing shell and the upper retaining plate decreases as the flow distance from said inlet to said outlet increases, said retaining plates further having peripheral flange portions extending therefrom and supported between the flange portions of said top and bottom shells, a bed of catalyst material filling the space between said dished upper and lower catalyst-retaining plates, said top and bottom catalyst-retaining plates having a plurality of perforations therethrough to permit the flow of exhaust gases between said inlet and outlet through the top retaining plate, the catalytic material and the bottom retaining plate, support studs extending between the
  • a low profile catalytic converter assembly for the treatment of exhaust gas of the type having top and bottom cup-like housing shells with side wall portions and peripheral flange portions extending outwardly therefrom, an exhaust gas inlet at one end of the said assembly and an exhaust gas outlet at the other end of said assembly formed between said peripheral flange portions, dished upper and lower catalyst retaining plates forming a catalyst retaining element, said retaining plates sloping relative to said housing shells so that the flow area between the top housing shell and the upper retaining plate decreases as the flow distance from said inlet to said outlet increases, said retaining plates further having peripheral flange portions extending therefrom and supported between the flange portions of said top and bottom shells, a bed of catalyst material filling the space between said dished upper and lower catalyst-retaining plates, said top and bottom catalyst-retaining plates having a plurality of perforations therethrough to permit the flow of exhaust gases between said inlet and outlet through the top retaining plate, the catalytic material and the bottom retaining plate, support studs extending between
  • portion in should read portion having a relatively thin dimension in a longitudinal direction of said support channel to permit movement of said face web portion in n Signed and Scaled this Fourteenth Day Of September 1976 [SEAL] A ttest:

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
US422699A 1973-12-07 1973-12-07 Catalytic converter bed support means Expired - Lifetime US3927984A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US422699A US3927984A (en) 1973-12-07 1973-12-07 Catalytic converter bed support means
JP14110174A JPS5419934B2 (enrdf_load_stackoverflow) 1973-12-07 1974-12-07
CA215,676A CA1005995A (en) 1973-12-07 1974-12-09 Catalytic converter bed support means

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US422699A US3927984A (en) 1973-12-07 1973-12-07 Catalytic converter bed support means

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US3927984A true US3927984A (en) 1975-12-23

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US (1) US3927984A (enrdf_load_stackoverflow)
JP (1) JPS5419934B2 (enrdf_load_stackoverflow)
CA (1) CA1005995A (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049388A (en) * 1976-07-12 1977-09-20 Arvin Industries, Inc. Center air manifold for catalytic converter
US4098580A (en) * 1976-06-10 1978-07-04 Toyota Jidosha Kogyo Kabushiki Kaisha Canister for catalyst converter and manufacturing process therefor
US4105414A (en) * 1975-12-23 1978-08-08 Alfa Romeo S.P.A. Catalytic muffler for internal combustion engines
US4126421A (en) * 1976-11-29 1978-11-21 Toyota Jidosha Kogyo Kabushiki Kaisha Catalytic converter vessel
US4185074A (en) * 1976-04-02 1980-01-22 Nissan Motor Company, Limited Catalytic converter with a catalyst bed supporter
US4235843A (en) * 1978-08-14 1980-11-25 Toyo Kogyo Co., Ltd. Catalytic converter
US4237099A (en) * 1979-04-25 1980-12-02 General Motors Corporation Catalytic converter with dual catalyst pellet beds and plenum therebetween
US4237098A (en) * 1979-04-25 1980-12-02 General Motors Corporation Catalytic converter with housing-bed-plenum reinforcing and spacing means
US4254085A (en) * 1980-03-07 1981-03-03 General Motors Corporation Catalytic converter with dual catalyst pellet beds and reinforced plenum therebetween
US20060172691A1 (en) * 2003-05-30 2006-08-03 Norbert Leonhardt Method for treating the air in a display cabinet and display cabinet for carrying out said method
US20110192140A1 (en) * 2010-02-10 2011-08-11 Keith Olivier Pressure swirl flow injector with reduced flow variability and return flow
US8740113B2 (en) 2010-02-10 2014-06-03 Tenneco Automotive Operating Company, Inc. Pressure swirl flow injector with reduced flow variability and return flow
US8910884B2 (en) 2012-05-10 2014-12-16 Tenneco Automotive Operating Company Inc. Coaxial flow injector
US8973895B2 (en) 2010-02-10 2015-03-10 Tenneco Automotive Operating Company Inc. Electromagnetically controlled injector having flux bridge and flux break
US8978364B2 (en) 2012-05-07 2015-03-17 Tenneco Automotive Operating Company Inc. Reagent injector
US9683472B2 (en) 2010-02-10 2017-06-20 Tenneco Automotive Operating Company Inc. Electromagnetically controlled injector having flux bridge and flux break
US10704444B2 (en) 2018-08-21 2020-07-07 Tenneco Automotive Operating Company Inc. Injector fluid filter with upper and lower lip seal
US12251676B2 (en) 2019-11-13 2025-03-18 Ihi Corporation Jig for inserting filling member into reactor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113443748B (zh) * 2021-07-27 2022-11-15 刘俊 一种污水处理氧化催化装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776875A (en) * 1952-11-03 1957-01-08 Oxycatalyst Inc Catalytic apparatus for exhaust gas treatment
US3766536A (en) * 1971-12-15 1973-10-16 Gen Motors Corp Catalytic converter monitor
US3799748A (en) * 1972-12-01 1974-03-26 Arvin Ind Inc Catalytic converter
US3801287A (en) * 1972-11-16 1974-04-02 Arvin Ind Inc Catalytic converter
US3809539A (en) * 1972-03-13 1974-05-07 Tenneco Inc Downflow catalytic converter for engine exhaust gases
US3852041A (en) * 1971-12-23 1974-12-03 Gen Motors Corp Low profile catalytic converter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234502Y2 (enrdf_load_stackoverflow) * 1971-05-12 1977-08-06
DE2239873B2 (de) * 1971-09-07 1977-06-23 General Motors Corp., Detroit, Mich. (V.St.A.) Katalytischer abgaskonverter fuer brennkraftmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776875A (en) * 1952-11-03 1957-01-08 Oxycatalyst Inc Catalytic apparatus for exhaust gas treatment
US3766536A (en) * 1971-12-15 1973-10-16 Gen Motors Corp Catalytic converter monitor
US3852041A (en) * 1971-12-23 1974-12-03 Gen Motors Corp Low profile catalytic converter
US3809539A (en) * 1972-03-13 1974-05-07 Tenneco Inc Downflow catalytic converter for engine exhaust gases
US3801287A (en) * 1972-11-16 1974-04-02 Arvin Ind Inc Catalytic converter
US3799748A (en) * 1972-12-01 1974-03-26 Arvin Ind Inc Catalytic converter

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105414A (en) * 1975-12-23 1978-08-08 Alfa Romeo S.P.A. Catalytic muffler for internal combustion engines
US4185074A (en) * 1976-04-02 1980-01-22 Nissan Motor Company, Limited Catalytic converter with a catalyst bed supporter
US4098580A (en) * 1976-06-10 1978-07-04 Toyota Jidosha Kogyo Kabushiki Kaisha Canister for catalyst converter and manufacturing process therefor
US4049388A (en) * 1976-07-12 1977-09-20 Arvin Industries, Inc. Center air manifold for catalytic converter
US4126421A (en) * 1976-11-29 1978-11-21 Toyota Jidosha Kogyo Kabushiki Kaisha Catalytic converter vessel
US4235843A (en) * 1978-08-14 1980-11-25 Toyo Kogyo Co., Ltd. Catalytic converter
US4237099A (en) * 1979-04-25 1980-12-02 General Motors Corporation Catalytic converter with dual catalyst pellet beds and plenum therebetween
US4237098A (en) * 1979-04-25 1980-12-02 General Motors Corporation Catalytic converter with housing-bed-plenum reinforcing and spacing means
US4254085A (en) * 1980-03-07 1981-03-03 General Motors Corporation Catalytic converter with dual catalyst pellet beds and reinforced plenum therebetween
US20060172691A1 (en) * 2003-05-30 2006-08-03 Norbert Leonhardt Method for treating the air in a display cabinet and display cabinet for carrying out said method
CN102834598A (zh) * 2010-02-10 2012-12-19 田纳科汽车营运公司 具有减小的流动变化性和回流的压力旋流注射器
US20110192140A1 (en) * 2010-02-10 2011-08-11 Keith Olivier Pressure swirl flow injector with reduced flow variability and return flow
US8740113B2 (en) 2010-02-10 2014-06-03 Tenneco Automotive Operating Company, Inc. Pressure swirl flow injector with reduced flow variability and return flow
WO2011100337A3 (en) * 2010-02-10 2011-12-22 Tenneco Automotive Operating Company Inc. Pressure swirl flow injector with reduced flow variability and return flow
US8973895B2 (en) 2010-02-10 2015-03-10 Tenneco Automotive Operating Company Inc. Electromagnetically controlled injector having flux bridge and flux break
CN102834598B (zh) * 2010-02-10 2015-03-18 田纳科汽车营运公司 一种引导试剂穿过注射器的方法
US8998114B2 (en) 2010-02-10 2015-04-07 Tenneco Automotive Operating Company, Inc. Pressure swirl flow injector with reduced flow variability and return flow
US9683472B2 (en) 2010-02-10 2017-06-20 Tenneco Automotive Operating Company Inc. Electromagnetically controlled injector having flux bridge and flux break
US10465582B2 (en) 2012-05-07 2019-11-05 Tenneco Automotive Operating Company Inc. Reagent injector
US8978364B2 (en) 2012-05-07 2015-03-17 Tenneco Automotive Operating Company Inc. Reagent injector
US8910884B2 (en) 2012-05-10 2014-12-16 Tenneco Automotive Operating Company Inc. Coaxial flow injector
US9759113B2 (en) 2012-05-10 2017-09-12 Tenneco Automotive Operating Company Inc. Coaxial flow injector
US10704444B2 (en) 2018-08-21 2020-07-07 Tenneco Automotive Operating Company Inc. Injector fluid filter with upper and lower lip seal
US12251676B2 (en) 2019-11-13 2025-03-18 Ihi Corporation Jig for inserting filling member into reactor

Also Published As

Publication number Publication date
CA1005995A (en) 1977-03-01
JPS5085713A (enrdf_load_stackoverflow) 1975-07-10
JPS5419934B2 (enrdf_load_stackoverflow) 1979-07-19

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