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US3771969A - Catalytic converter - Google Patents

Catalytic converter Download PDF

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Publication number
US3771969A
US3771969A US00141730A US3771969DA US3771969A US 3771969 A US3771969 A US 3771969A US 00141730 A US00141730 A US 00141730A US 3771969D A US3771969D A US 3771969DA US 3771969 A US3771969 A US 3771969A
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United States
Prior art keywords
shell
chambers
chamber
side walls
pair
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.)
Expired - Lifetime
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US00141730A
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English (en)
Inventor
G Scheitlin
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Meritor Inc
Original Assignee
Arvin Industries Inc
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Filing date
Publication date
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • 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
    • F01N13/009—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 having two or more separate purifying devices arranged in series
    • F01N13/0097—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 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • 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
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
    • 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
    • F01N13/14—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 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
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/04—Filling or emptying a chamber with 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • Each of said chambers ex- UNITED STATES PATENTS tends diametrically across the converter and each is 3,016,108 1/1962 Myddelton 23/288 F UX provided with a pair of opposed faces having openings 3,086,839 4/1963 Bloch 23/288 FX formed therein whereby the exhaust gases will pass 3.0901677 5/1963 scheftlfn et alm 23/288 F successively through said chambers during their move- 3,149,925 9 1964 Scheitlm 23 288 F mm from the inlet to the outlet 3,180,712 4/1965 Hamblin 23/288 F 3,228,746 1/1966 Howke et a1.
  • This invention overcomes the disadvantages of the prior art structures by providing a catalytic converter having a pair of conversion chambers adapted to hold two different catalysts so that the exhaust gases can pass successively through "said chambers and be subjected to the action of the catalysts therein under two different conditions of reaction.
  • a catalytic converter provided with an elongated shell closed at its ends by a'pair of end caps.
  • Inlet and outlet conduits project inwardly through said end caps at the opposite ends of said shell and are supported adjacent their inner ends in a pair of baffle plates which form with said shell and end caps a pair of sound attenuating chambers for reducing the noise level of the exhaust gas stream passing through the converter.
  • First and second conversion chambers adapted to hold catalytic material are mounted in the shell between the inlet and outlet conduits in longitudinally spaced relationship.
  • the chambers extend obliquely across the shell, and each is provided with a pair of opposed perforate faces so that the exhaust gases will pass successively through the chambers during their movement from the inlet conduit to the outlet conduit.
  • a tube connected to a source of pressurized air extends across the shell between -the two conversion chambers.
  • Said tube has a plurality of longitudinally spaced openings for injecting the air into the shell. With the exhaust gases flowing through the shell, the injected air will be swept to and through the second chamber to permit said chamber to operate in an oxidizing atmosphere as contrasted to the non-oxidizing or reducing atmosphere of the first chamber.
  • FIG. 1 is a longitudinal vertical section of a catalytic converter embodying the invention
  • FIG. 2 is a horizontal section taken on the line 2-2 of FIG. ,1;
  • FIG. 3 is an enlargedvertical section taken on the line 3-3 of FIG. 1;
  • FIG. 4 is an enlarged vertical section taken on the line 3-3 of FIG. 1;
  • FIG. 5 is a vertical section similar to FIG. 3, but showing a modified form of the conversion chamber
  • FIG. 6 is a longitudinal vertical section of a modified form of the catalytic converter shown in FIG. 1;
  • FIG. 7 is a horizontal section taken on. the line 7--7 of FIG. 6;
  • FIG. 8 is a vertical section taken on the line 8-8 of FIG. 6;
  • FIG. 9 is a vertical section taken on the line 9-9 of FIG. 6.
  • the converter is housed in an elongated shell construction having inner and outer side walls 10 and 12 disposed in spaced relationship with a layer of thermal insulation 15 interposed therebetween.
  • the sidewalls 10 and 12 for strength and economy of space, are in the form of concentric closed curves, an ellipse as shown.
  • the ends of the shell side walls l0 and l2 abut each other'and are rigidly connected, as by common roll seams 18, to a pair of end caps 20-closing the opposed ends of the shell.
  • A' pair of baffle plates 22 are mounted within the shell slightly inwardly from the end caps 20.
  • Each of said baffle plates is provided with a shouldered aperture 24 disposed in axial alignment with a shouldered aperture 26 formed in each of the endcaps 20.
  • the aligned openings 24 and 26 support an inlet conduit 28 atone end of the converter, and the aligned openings 24 and 26 at the opposite end of the converter support an outlet conduit 30.
  • the inlet and outlet conduits are longitudinally misaligned with respect to each other to distribute the weight load of the converter and prevent it from rotating about its center axis when it is mounted on a vehicle.
  • Each of the baffle plates 22 is provided with a plurality of louvered openings 31.
  • the inlet and outlet conduits 28 and 30 terminate inwardly of the baffle plates 22 whereby the spaces between said baffle plates and their adjacent end'caps 20 form a pair of sound attenuating chambers 32 at the opposite ends of the converter; said chambers being acoustically coupled to the gas stream through the baffle plate openings 31, or any convenient resonator throat-formingmembers.”
  • a pair of conversion chamers 33 and 35 are mounted within the'converter in longitudinally spaced relationship.
  • the conversion chambers are adapted to hold catalytic material for removing the noxious pollutants from the exhaust gas stream as it passes through the converter from the inlet conduit 28 to the outlet conduit 30.
  • each chamber may contain a catalyst selected for a particular type of pollutant.
  • chamber 33 may contain a catalyst specific for removing the oxides of nitrogen from the exhaust gas stream
  • the chamber 35 may contain a catalyst for selectively removing the noxious hydrocarbons and carbon monoxide from said stream.
  • the chambers 33 and 35 are identical in their construction and their mounting in the converter, and consequently,- only one such chamber will be described herein. y
  • each of the chambers is formed by an elongated top wall 37 and a bottom wall 38 interconnected by a pair of imperforate rectangular side walls 39.
  • Said top and bottom walls 37 and 38 are each provided with longitudinally extending rows of slots or louvered openings 40 to permit the exhaust gas stream to flow through the chamber.
  • the forward end of the chamber is closed by an end plate 42 comprising an iinperforate end wall 44 extending across the chamber and integral with a forwardly directed peripheral flange 45.
  • the opposite end of the chamber is enclosed by an end plate 46 comprising an imperforate end wall 47 integrally connected to a rearwardly projecting peripheral flange 48.
  • Each of the chambers 33 and 35 extends obliquely across the interior of the shell so that the entire exhaust gas stream must pass successively through them during its passage through the converter.
  • the top and bottom walls 37 and 38 have opposed congruent configurations.
  • the top wall edge adjacent the outlet conduit has an arcuate cross-section corresponding to the curvature of the top portion of the shell wall 10, which arcuate cross-section progressively flattens out toward the edge adjacent the inlet conduit into coplanarity.
  • the bottom wall edge adjacent the inlet conduit has an arcuate cross-section and said bottom wall progressively flattens out into coplanarity at its edge adjacent the outlet conduit.
  • the side and bottom stretches of flange 45 on end plate 42 project outwardly from the end of the chamber and are bent laterally outwardly, into abutting engagement with the shell side wall 10, as at 50, and are rigidly secured threto.
  • the side and top stretches of the flange 48 on end plate 46 project outwardly from the chamber and are bent laterally outwardly into abutting engagement with the shell side wall, as at 52, and are rigidly secured thereto.
  • the end plates 42 and 46 help mount the chambers within the shell and prevent the passage of gas between said chambers and the shell side walls.
  • the top stretch of flange 45 and the bottom stretch of flange 48 do not project beyond their respective ends of the chamber and thereby reduce the amount of turbulence and back pressure within the converter.
  • each of the braces comprises a pair of V-shaped walls 55 having their apex abutting the bottom chamber wall 38 between an adjacent pair of rows of the louvered openings 40 and terminating at their lower ends in laterally projecting fingers 57 rigidly secured to the shell side wall 10. Because of the tilted mounting of the chambers, the brace walls 55 gradually increase in depth from their ends disposed toward the inlet conduit 28 to their ends disposed toward the outlet conduit 30.
  • pluralities of openings 58 are formed in the brace walls 55 to help distribute the gas flow uniformly out of the chambers. While the embodiments shown in FIGS. lshow the braces disposed along only the bottoms of the chambers 33 and 35, it is to be understood, of course, that identical sets of such braces can be interposed between the converter shell and the tops of said chambers.
  • the metal forming the edges of the chamber side walls 39 and the top and bottom walls 37 and 38 is crimped together to form beads 60 projecting obliquely outwardly from the chambers 33 and 35 along their lengths. Said beads are received in inwardly open grooves 62 formed in the shell side wall 10. The metal forming said grooves is crimped over the beads for further rigidly connecting the chambers to the shell and rigidizing the converter assembly.
  • the side walls 39 of the chambers 33 and 35 shown in FIGS. 1-3 are planar, they are spaced from the adjacent portions of the shell side wall'10 and thus provide insulating air spaces along the sides of the chambers. These air spaces are closed by the end plate flange portions 50 and 52, and may be filled with an in sulating material 64.
  • the chambers 33 and 35 are adapted to hold a catalytic material which effects conversion of the noxious pollutants in the exhaust gases into non-noxious components.
  • catalysts may be in the form of pellets inserted into the chambers prior to assembling the end plates thereon.
  • the small size of the slots or louvered openings 40 in the top and bottom walls 37 and 38 prevents the pellets from falling out of the chambers.
  • fill tubes 66 are mounted in the shell side walls 10 and 12 and extend into the adjacent chamber side walls 39, said fill tubes being closable by screw caps 68.
  • a tube 72 extends across the converter shell between the chambers 33 and 35. As shown in FIG. 2, one end of said tube is closed at 73 and is connected to the shell side wall 10. The opposite end of said tube projects outwardly through aligned openings 74 in the side walls 10 and 12 at the opposite side of the shell for connection to a source of pressurized air. A plurality of longitudinally spaced openings 75 are formed in the tube for injecting air into the converter between the two conversion chambers.
  • the injected air With the natural gas flow from the inlet conduit to the outlet conduit, the injected air will be swept along with the gas flow to and through the chamber 35 so that the catalyst therein will be in an oxidizing atmosphere while the catalyst in chamber 33 remains in a non-oxidizing atmosphere.
  • the exhaust gases enter the converter through the inlet conduit 28 and pass into the chamber 33 through its louvered top wall 37.
  • the chamber 33 is filled with a catalyst selective for the oxides of nitrogen. These pollutants are thus removed from the exhaust gas stream as it passes through the chamber 33.
  • the gases exiting chamber 33 through its bottom wall 38 are mixed with the air from the tube 72 and then enter chamber 35 through its louvered top wall 37.
  • the noxious carbon monoxide and hydrocarbon pollutants areremoved from the gases by the catalyst in chamber 35, and said gases exit chamber 35 through its louvered bottom wall 38 for discharge through the outlet conduit 30.
  • its noise level will be attenuated by the attenuating chambers 32.
  • FIG. 5 differs from that shown in FIGS. 14 only in the configuration of the side walls 39' of the conversion chambers.
  • the louvered top and bottom walls 37' and 38' of the chamber are connected to the side walls 39, each of which has an areuate cross-section which abuts the adjacent portion of the shell side wall in face-to-face relationship.
  • This construction eliminates the air spaces along the sides of the conversion chambers and the insulation 64 therein as shown in FIG. 3, as well as the beads and grooves 60 and 62.
  • the converter is housed in an elongated shell having concentric inner and outer side walls 110 and 112 disposed in spaced relationship with a layer of insulation 115 interposed therebetween.
  • the ends of said side walls abut each other and are rigidly connected to each other and to a pair of end caps 120 closing the ends of the shell, as by welding.
  • a pair of baffle plates 122 are mounted within the shell slightly inwardly from the end caps 120. Shouldered apertures 124 are formed in the baffle plates in axial alignment with shouldered apertures 126 in the end caps 120, and an inlet conduit 128 is supportedin one set of said apertures at one end of the converter and an outlet conduit 130 is supported in the other set of said apertures at the opposite end of the converter.
  • conduits 128 and 130 terminate inwardly of the baffle plates 122, and each of said plates has a plurality of louvered openings 131 therein so that the spaces between said plates and the end caps form a pair of sound attenuating chambers 132 acoustically coupled to the gas stream through the plate openings 131, or any other convenient resonator throat-forming members.
  • a pair of conversion chambers 133 and 135 are mounted in the converter in longitudinally spaced relationship with each chamber extending obliquely across the converter shell.
  • the chambers are formed by an elongated top wall 137 and a bottom wall 138 interconnected by a pair of side walls 139 connected to the adjacent portions of the shell side wall 110.
  • the walls 137-139 are generally arched such that the opposed ends of the bottom wall 138 abut and are connected to the bott'om portion of the shell side wall 110 with the center portion of saidbot tom wall having a transition section 140 interposed between the chambers 133 and 135 andspacedwe ll'above the bottom portion of said shell side wall.
  • the ends of the top wall 137 are spaced from the bottom portion of the shell side wall 110, but the transition section 141 of said top wall interposed between the two chambers abuts and is connected to the adjacent top portion of said shell side wall.
  • the remote ends of the chambers 133 and 135 are closed by imperforate end plates 142 and 146 connected to the chamber top, bottom and side walls 137-139.
  • the adjacent ends of said chambers are closed by a second pair of end plates 147 and 148 connected to the chamber walls 137-139 at the remote ends of the transition sections 140 and; 141.
  • a plurality of longitudinally spaced, apertured braces 149 are mounted within and extend across each of the chambers 133 and 135.
  • the top and bottom walls 137 and 138 are provided with pluralities of slots or louvered openings 150.
  • the openings 150 are formed only within the extent of the chambers and are not provided with the extent of 1* lustrated herein have been described as employing two different catalysts in the two conversion chambers, it is the transition sections 140 and 141.
  • all of the gas entering the converter through the inlet 128 passes downwardly through the top wall 137 of chamber 133 and then exits said chamber throughthe bottom wall 138. It then moves upwardly through the bottom wall 138 of chamber and exits saidichamber through the top wall 137 for discharge through the outlet 130.
  • the noise level of the gases passing through the converter will be attenuated by the sound attenuating chambers 132.
  • the transition sections and 141 together with the end plates 147 and 148, form a plenum chamber 152 interposed between the chambers 133 and 135.
  • the chamber 152 has a plurality of openings 153 formed in the transition section 140, and a tube 154 adapted to be connected to a source of pressurized air is mounted in the shell side walls 110 and 112 in open communication with said plenum chamber.
  • the air supplied to the chamber 152 by the tube 154 is discharged through the openings 153 between the outlet of chamber 133 and the inlet of chamber 135.
  • the gas flow through the converter will thus carry the injected air with it so that the chamber 135 can achieve conversion under an oxidizing atmosphere while the chamber 133 can achieve conversion in a reducing atmosphere.
  • the chambers 133 and 135 may hold the same types of catalysts as the chambers 33 and 35 shown in FIGS. 1-4.
  • a fill tube 155 is mounted in the shell side walls 110 and 112 and extends into the adjacent chamber side wall within the extent of each of the chambers 133 and 135.
  • Each of the till tubes 15 is closable by a screw cap 156.
  • the converter is shown in FIGS. 6-9 as having an outer shell and chambers with concentric generally rectangular cross-sections, but it is to be understood, of course, that said shell and chambers can, if it is desired, have any desired cross-sections, such as, for example, the eliptical cross-sections of the embodiment shown in FIGS. 1-5.
  • the air tubes 72 and 152 can be connected to suitable valves to prevent the flow of air therethrough if a non-oxidizing atmosphere is desired.
  • an elongated shell having side walls, end caps closing the ends of said shell, gas inlet and outlet conduits in open communication with the interior of said shell adjacent its opposed ends, and first and second longitudinally spaced conversion chambers mounted in said shell inwardly from the ends thereof and extending obliquely across said shell, each of said chambers being adapted to hold catalytic material for removing noxious pollutants from exhaust gases and having top and bottom perforate walls interconnected by a pair of imperforate side walls and a pair of imperforate end plates, said top wall on said first chamber being in open communication with said inlet conduit and said bottom wall on said first chamber being in open communication with the top wall on said second chamber, saidsecond chamber bottom wall being in open communication with said outlet conduit, said end plates projecting longitudinally out.- wardly from the ends of said chambers and being connected to said shell with the portions of said end plates projecting longitudinally outwardly from saidchambers toward the inlet
  • an elongated shell having side walls, end caps closing the ends of said shell, gas inlet and outlet conduits in open communication with the interior of said shell adjacent its opposed ends, first and second longitudinally spaced conversion chambers mounted in said shell and adapted to hold catalytic material for removing the noxious pollutants from exhaust gases, each of said chambers extending obliquely across said shell, said first chamber having a first perforate wall surface in open communication with said inlet conduit and a second perforate wall surface in open communication with a first perforate wall surface on said second chamber, said second chamber having a second perforate wall surface in open communication with said outlet conduit, and a plurality of longitudinally extending, laterally spaced braces extending between the bottom of each of said chambers and the adjacent shell side wall.
  • each of said braces is generally wedge-shaped and comprises a pair of V-shaped wals abutting at their apex the bottom wall of one of said chambers between the openings therein, and fingers projecting outwardly from said V- shaped walls rigidly connected to the shell inner side wall.
  • each of said chambers has its end disposed toward the inlet conduit interconnected to the bottom of the shell and its end disposed toward the outlet conduit interconond pair of end plates.
  • an elongated shell having side walls, end caps closing the ends of said shell, gas inlet and outlet conduits in open communication with the interior of said shell adjacent its opposed ends, and first and second longitudinally spaced conversion chambers mounted in said shell and adapted to hold catalytic material for removing the noxious pollutants from exhaust gases, said first and second chambers extending obliquely across said shell and comprising a bottom wall connected at its opposed ends to the bottom portion of the shell side walls and having a centrally disposed transition section spaced from said bottom portion, a top wall having a centrally disposed transition section connected to the top portion of said shell side walls and having its opposed ends spaced from said top and bottom portions of said side walls, a pair of side walls interconnecting said top and bottom walls, a first pair of end plates connected to said top, bottom and pair of side walls at the opposed ends thereof, and a second pair of end plates connected to said top, bottom and pair of side walls at the opposed ends of

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (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)
US00141730A 1971-05-10 1971-05-10 Catalytic converter Expired - Lifetime US3771969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14173071A 1971-05-10 1971-05-10

Publications (1)

Publication Number Publication Date
US3771969A true US3771969A (en) 1973-11-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00141730A Expired - Lifetime US3771969A (en) 1971-05-10 1971-05-10 Catalytic converter

Country Status (6)

Country Link
US (1) US3771969A (de)
JP (1) JPS558653B1 (de)
CA (1) CA962461A (de)
DE (1) DE2201998A1 (de)
FR (1) FR2137421B1 (de)
GB (1) GB1334764A (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902853A (en) * 1973-04-06 1975-09-02 Ethyl Corp Exhaust reactor
US4038036A (en) * 1974-09-16 1977-07-26 The Ralph M. Parsons Company Apparatus for the production of sulfur from mixtures of hydrogen sulfide and fixed nitrogen compounds
US4049388A (en) * 1976-07-12 1977-09-20 Arvin Industries, Inc. Center air manifold for catalytic converter
DE3007866A1 (de) * 1979-04-16 1980-10-30 Gen Motors Corp Katalytischer konverter fuer brennkraftmaschinenabgase
US4235843A (en) * 1978-08-14 1980-11-25 Toyo Kogyo Co., Ltd. Catalytic converter
US4256700A (en) * 1979-04-16 1981-03-17 General Motors Corporation Catalytic converter with air tube
US4264561A (en) * 1978-06-05 1981-04-28 Hoechst Aktiengesellschaft Converter for catalytic conversion of exhaust gas from an internal combustion engine
US4501118A (en) * 1983-05-16 1985-02-26 Arvin Industries, Inc. Catalytic converter housing
US4511536A (en) * 1982-07-24 1985-04-16 Toyota Jidosha Kabushiki Kaisha Catalytic converter secondary air supply pipe support
US4536371A (en) * 1983-05-16 1985-08-20 Arvin Industries, Inc. Catalytic converter divider
US4701312A (en) * 1982-09-29 1987-10-20 Kice Warren B Fluidized bed catalytic converter
EP1262643A1 (de) * 2001-05-14 2002-12-04 MAN Nutzfahrzeuge Aktiengesellschaft Fahrzeugabgasanlage mit Katalysatoren in einem Abgasleitungsabschnitt
US20040065079A1 (en) * 2000-11-18 2004-04-08 Guenter Stephani Method and device for aftertreatment exhaust gases from combustion engines
US20070251761A1 (en) * 2006-05-01 2007-11-01 Yamaha Hatsudoki Kabushiki Kaisha Exhaust device and vehicle with exhaust device
US20100050598A1 (en) * 2008-08-27 2010-03-04 Stefano Plati Catalytic Converter Apparatus
US20120119512A1 (en) * 2011-08-25 2012-05-17 General Electric Company Power plant and method of operation
US8347600B2 (en) 2011-08-25 2013-01-08 General Electric Company Power plant and method of operation
US20130086894A1 (en) * 2011-10-07 2013-04-11 Megan Wikaryasz Exhaust treatment device with integral mount
US8453462B2 (en) 2011-08-25 2013-06-04 General Electric Company Method of operating a stoichiometric exhaust gas recirculation power plant
US20130171035A1 (en) * 2012-01-04 2013-07-04 Tenneco Automotive Operating Company Inc. Fully insulated exhaust treatment device
US8713947B2 (en) 2011-08-25 2014-05-06 General Electric Company Power plant with gas separation system
US20140248187A1 (en) * 2011-10-07 2014-09-04 Tenneco Automotive Operating Company Inc. Exhaust Treatment Device With Integral Mount
US9127598B2 (en) 2011-08-25 2015-09-08 General Electric Company Control method for stoichiometric exhaust gas recirculation power plant

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FI98403C (fi) * 1994-07-01 1997-06-10 Waertsilae Diesel Int Menetelmä äänenvaimenninyksikön käyttämiseksi ja järjestelmä menetelmän soveltamiseksi isossa dieselmoottorissa

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US3228746A (en) * 1960-09-29 1966-01-11 Du Pont Method of treating exhaust gases of internal combustion engines
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US3902853A (en) * 1973-04-06 1975-09-02 Ethyl Corp Exhaust reactor
US4038036A (en) * 1974-09-16 1977-07-26 The Ralph M. Parsons Company Apparatus for the production of sulfur from mixtures of hydrogen sulfide and fixed nitrogen compounds
US4049388A (en) * 1976-07-12 1977-09-20 Arvin Industries, Inc. Center air manifold for catalytic converter
US4264561A (en) * 1978-06-05 1981-04-28 Hoechst Aktiengesellschaft Converter for catalytic conversion of exhaust gas from an internal combustion engine
US4235843A (en) * 1978-08-14 1980-11-25 Toyo Kogyo Co., Ltd. Catalytic converter
DE3007866A1 (de) * 1979-04-16 1980-10-30 Gen Motors Corp Katalytischer konverter fuer brennkraftmaschinenabgase
US4238456A (en) * 1979-04-16 1980-12-09 General Motors Corporation Catalytic converter with uniform air distribution and mixing with the exhaust gases
US4256700A (en) * 1979-04-16 1981-03-17 General Motors Corporation Catalytic converter with air tube
US4511536A (en) * 1982-07-24 1985-04-16 Toyota Jidosha Kabushiki Kaisha Catalytic converter secondary air supply pipe support
US4701312A (en) * 1982-09-29 1987-10-20 Kice Warren B Fluidized bed catalytic converter
US4536371A (en) * 1983-05-16 1985-08-20 Arvin Industries, Inc. Catalytic converter divider
US4501118A (en) * 1983-05-16 1985-02-26 Arvin Industries, Inc. Catalytic converter housing
US20040065079A1 (en) * 2000-11-18 2004-04-08 Guenter Stephani Method and device for aftertreatment exhaust gases from combustion engines
US6968681B2 (en) * 2000-11-18 2005-11-29 Glatt Systemtechnik Gmbh Method and device for aftertreatment of exhaust gases from combustion engines
EP1262643A1 (de) * 2001-05-14 2002-12-04 MAN Nutzfahrzeuge Aktiengesellschaft Fahrzeugabgasanlage mit Katalysatoren in einem Abgasleitungsabschnitt
US20070251761A1 (en) * 2006-05-01 2007-11-01 Yamaha Hatsudoki Kabushiki Kaisha Exhaust device and vehicle with exhaust device
US7931120B2 (en) * 2006-05-01 2011-04-26 Yamaha Hatsudoki Kabushiki Kaisha Exhaust device and vehicle with exhaust device
US9101881B2 (en) 2008-08-27 2015-08-11 Vida Holdings Ltd. Catalytic converter apparatus
US20100050598A1 (en) * 2008-08-27 2010-03-04 Stefano Plati Catalytic Converter Apparatus
US9926824B2 (en) 2008-08-27 2018-03-27 Vida Fresh Air Corp. Catalytic converter apparatus
US8309032B2 (en) 2008-08-27 2012-11-13 Vida Holdings Ltd. Catalytic converter apparatus
US9108156B2 (en) 2008-08-27 2015-08-18 Vida Holdings Ltd. Catalytic converter apparatus
US8347600B2 (en) 2011-08-25 2013-01-08 General Electric Company Power plant and method of operation
US8453462B2 (en) 2011-08-25 2013-06-04 General Electric Company Method of operating a stoichiometric exhaust gas recirculation power plant
US8453461B2 (en) * 2011-08-25 2013-06-04 General Electric Company Power plant and method of operation
US20120119512A1 (en) * 2011-08-25 2012-05-17 General Electric Company Power plant and method of operation
US8713947B2 (en) 2011-08-25 2014-05-06 General Electric Company Power plant with gas separation system
CN102953819B (zh) * 2011-08-25 2016-08-03 通用电气公司 动力装置和操作方法
US9127598B2 (en) 2011-08-25 2015-09-08 General Electric Company Control method for stoichiometric exhaust gas recirculation power plant
CN102953819A (zh) * 2011-08-25 2013-03-06 通用电气公司 动力装置和操作方法
US20130086894A1 (en) * 2011-10-07 2013-04-11 Megan Wikaryasz Exhaust treatment device with integral mount
US20150152772A1 (en) * 2011-10-07 2015-06-04 Tenneco Automotive Operating Company Inc. Exhaust Treatment Device With Integral Mount
CN104302879A (zh) * 2011-10-07 2015-01-21 田纳科汽车营运公司 具有一体式安装架的排气处理装置
US20140248187A1 (en) * 2011-10-07 2014-09-04 Tenneco Automotive Operating Company Inc. Exhaust Treatment Device With Integral Mount
US9140174B2 (en) * 2011-10-07 2015-09-22 Tenneco Automotive Operating Company Inc. Exhaust treatment device with integral mount
US9163549B2 (en) * 2011-10-07 2015-10-20 Tenneco Automotive Operating Company Inc. Exhaust treatment device with integral mount
KR101623511B1 (ko) * 2011-10-07 2016-05-23 테네코 오토모티브 오퍼레이팅 컴파니 인코포레이티드 내장 마운트를 갖는 배기 처리 장치
US8721977B2 (en) * 2011-10-07 2014-05-13 Tenneco Automotive Operating Company Inc. Exhaust treatment device with integral mount
CN104302879B (zh) * 2011-10-07 2017-02-15 田纳科汽车营运公司 具有一体式安装架的排气处理装置
US20130171035A1 (en) * 2012-01-04 2013-07-04 Tenneco Automotive Operating Company Inc. Fully insulated exhaust treatment device

Also Published As

Publication number Publication date
FR2137421B1 (de) 1973-06-08
AU3177071A (en) 1973-02-01
FR2137421A1 (de) 1972-12-29
DE2201998A1 (de) 1972-11-16
CA962461A (en) 1975-02-11
JPS558653B1 (de) 1980-03-05
GB1334764A (en) 1973-10-24

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