US3899302A - Catalytic converter housing - Google Patents

Catalytic converter housing Download PDF

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Publication number
US3899302A
US3899302A US418646A US41864673A US3899302A US 3899302 A US3899302 A US 3899302A US 418646 A US418646 A US 418646A US 41864673 A US41864673 A US 41864673A US 3899302 A US3899302 A US 3899302A
Authority
US
United States
Prior art keywords
bed
inlet
cover
housing
pin
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
Application number
US418646A
Other languages
English (en)
Inventor
Melvin H Wagner
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.)
Universal Oil Products Co
Original Assignee
Universal Oil Products Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universal Oil Products Co filed Critical Universal Oil Products Co
Priority to US418646A priority Critical patent/US3899302A/en
Priority to CA213,682A priority patent/CA1012370A/en
Priority to IT54119/74A priority patent/IT1023311B/it
Priority to DE2454704A priority patent/DE2454704C3/de
Priority to SE7414658A priority patent/SE407261B/sv
Priority to FR7438425A priority patent/FR2252486B1/fr
Priority to ES0432175A priority patent/ES432175A1/es
Priority to JP13541474A priority patent/JPS578294B2/ja
Priority to GB50893/74A priority patent/GB1485848A/en
Application granted granted Critical
Publication of US3899302A publication Critical patent/US3899302A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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 ; 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • 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
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus

Definitions

  • AppL 418,646 pin maintains the spacing between the bed and the inlet housing cover and prevents any deformation caused by a sudden increase in inlet gas pressure due U-S- CI- to the presence of excess oxygen and unburned hydro- 8/ FOIN carbons downstream of the exhaust valves.
  • the cata- Of Search F; lyst bed o chamber is defined a pai f facing 423/212, 2 3- dish-shaped members drawn from a perforated metal screen and welded to each other along circumferential References Cited radial flange portions.
  • the anti-backfire pin is centrally mounted for 3,766.536 10/1973 Hile 23/288 F X rocking movement relative to the housing under they- 3,852,041 12/1974 Moore et al 23/288 F Primary Examiner-Joseph Scovronek Assistant Examiner-Michael S. Marcus Attorney, Agent, or Firm.lames R. Hoatson, Jr.; Barry L. Clark; William H. Page, II
  • the pin has spherically dished washers joined to its ends which are held in sliding engagement with embossed areas in the cover members which have a corresponding shape.
  • the floating catalyst bed consists of two symmetrical drawn screen components having a circumferential flange portion which is welded peripherally at the outer extent of the flange so as to comprise an enclosure for containment of the catalyst pellets.
  • the catalyst bed assembly is held in the desired position within the converter body by means of an inlet cover and an outlet cover having flanged portions configured in such manner that the catalyst bed assembly can be placed within the inlet and outlet cover so that the flanged portion of the catalyst bed assembly rests upon the lower cover flange portion, and the inlet cover flanged portion can be placed upon the opposite side of the catalyst bed flanged portion.
  • the inlet cover is additionally flanged in such a manner that the outer periphery of the flanged portion is formed downwardly for a distance equal to the thickness of the two flanges which extend from the catalyst bed assembly.
  • the flanges permit the inlet and outlet cover members to be attached to each other by a conventional welded process with a circumferential weld joining the flanged portion of the outlet cover and the flanged portion of the inlet cover but leaving the flanged portion of the catalyst bed assembly free to move.
  • the downwardly formed flange portion in the inlet cover is formed with a sufficient internal diameter to allow for radial thermal exercising of the catalyst bed.
  • the body covers would act as a restraint to thermal expansion of the catalyst bed components and would cause buckling or some form of deformation as a result of the differential of temperature.
  • the converter assembly also includes an antibackfire pin.
  • This pin is of such construction that when used in cooperation with a series of washers or spacers it provides a uniform desired spacing of the catalyst bed screen components and the inlet and outlet cover components and secures them together.
  • the pin also provides resistance to the pressures of backfires in the exhaust path under all conditions of differential thermal growth between the internal screen components and the external cover components/The differential thermal growth is accommodated by providing a large pin receiving opening in the catalyst bed screen components.
  • a pair of shouldered portions on each end of the anti-backfire pin support a pair of large circular washers which are axially spaced from each other by the thickness of the screen.
  • the washers contact the inside portion of the screen component and the outside portion of the screen component and permit radial relative movement of the screen while sealing against passage of gases around the clearance hole in the screen.
  • the ends of the anti-backfire pin extend outwardly from the bed assembly through an appropriate hole in the inlet and outlet cover.
  • the areas immediately surrounding the holes in the inlet and outlet covers are spherically embossed inwardly in such manner as to accept formed washers of a complementary curved shape.
  • the ends of the anti-backfire pin extend outwardly beyond the outward surface of each curved washer a sufficient distance to permit the pin to be welded to an additional washer which bears against the outward curved surface of the formed washers.
  • This mounting method allows a small amount of rotational or rocking movement of the pin about any transverse axis through its center to accommodate differential thermal growth between the inlet cover portion and the outlet cover portion.
  • FIG. 1 is a side sectional view taken on line 11 of FIG. 2;
  • FIG. 2 is a top plan view of the improved catalytic converter with portions broken away for clarity;
  • FIG. 3 is a fragmentary cross-sectional view taken on line 33 of FIG. 2.
  • the improved catalytic converter indicated generally at includes an inlet cover 12 and an outlet cover 14.
  • An additional cover 16 forms a heat shield on the upper side of the converter to protect portions of the vehicle positioned above it.
  • Engine exhaust gases are directed to the converter by an inlet tube 18 and inlet transition member 20 which are welded to the inlet cover 12.
  • an outlet tube 22 and outlet transition member 24 are welded to the outlet cover 14.
  • a catalyst bed assembly indicated generally at 28 and including a perforated inlet screen member 30 and a perforated outlet screen member 32.
  • the catalyst bed assembly 28 is filled with catalyst pellets 34 through a loading tube 36 which is welded at 38 to screens 30, 32.
  • the loading tube is also welded at 40 to cover members l2, l4 and at 42 to the heat shield 16.
  • the loading tube 36 is closed by means of a closure plug 44.
  • the screens are embossed with ribs 48, respectively.
  • the peripheral edges of the screen members 30,- 32 are provided with flanges 52, 54 respectively which are welded together at their peripheries by weld bead 56.
  • the screen flanges 52, 54 are adapted for radial movement between upper cover radial flange portion 58 and lower cover radial flange portion 60 in response to differential temperature gradients between the covers and the bed assembly 28.
  • the radial flanges 58, 60 are held in a predetermined spacing relative to each other by means of an axial flange 62 formed on the upper cover and a weld bead 64 which attaches it to flange 60.
  • the axial flange 62 has a greater internal diameter than the external diameter of the bed assembly 28 so as to provide a space 66 for expansion of the bed assembly 28. Since the bed assembly covers l2, l4 and heat shield 16 are all welded to the loading tube 36, it is obvious that no relative movement can take place between the bed assembly 28 and the covers 12, 14 in the vicinity of the loading tube 36. Rather, movement takes place away from tube 36.
  • an anti-backfire pin assembly 70 is provided.
  • the assembly 70 comprises a pin 72 having an inner shoulder 74 which bears on an inner screen retaining washer 76.
  • the inlet screen 30 rests on the retaining washer 76 and is spaced from the pin 72 by a space 78 which accommodates thermal expansion of the screen.
  • the pin 72 further includes an intermediate shoulder portion 80 upon which an outer screen retaining washer member 82 is positioned.
  • the washers 76 and 82 provide some strength to the screen 30 in the vicinity of the space 78 while providing a guide for sliding movement.
  • the pin 72 is further reduced in diameter along end portion 84 which is surrounded by flat spacer washers 86.
  • the lower end is identical.
  • the converter 10 has been shown as having a generally circular configuration and right angled embossed ribs 48 for strengthening it will be appreciated that other shapes such as an oblong shape could be used and that the embossed ribs could be formed in other ways depending upon the strength required.
  • the ribs would preferably be arranged parallel to the longitudinal direction of the converter.
  • a converter having 1 pin assembly 70 has been shown it will be appreciated that for larger converters strength requirements might dictate the presence of 2, 4 or more pin assemblies.
  • engine exhaust gases passing into the converter 10 through inlet tube 18 normally pass down through the catalyst 34 and out the outlet tube 22. In doing so they increase in temperature depending upon the amount of combustibles present so that the converter outlet screen 32 could be at a temperature of ]500F or higher as compared to an inlet temperature of perhaps 550F at the inlet cover 12.
  • the converter 10 In order that the converter 10 will last for a long time, preferably 50,000 miles or more, it is constructed of material such as Type 409 stainless steel which will provide the necessary corrosion resistance and high temperature durability.
  • differential temperature expansions during use of the converter are relatively small in magnitude, they are of great significance since the converter temperature is constantly rising and falling as the engine speed and load changes.
  • a catalytic converter assembly comprising a metal housing including a inlet housing cover portion and a metal outlet housing cover portion; a particulate catalyst retaining bed portion including a chamber defined by a pair of facing, dished, perforated metal inlet and outlet members; said pair of dished members having peripheral, joined together, radially extending flange portions; each of said cover portions having peripheral flanges which extend radially beyond, and slidably engage, the flange portions on said dished members; at least one of said cover portions having an axially extending flange portion which is welded to the other cover portion at a location spaced radially outwardly of the flange portions of said dished members; said bed portion being free to 'slideinthe plane of said flange portions in response to temperature differences between the metal housing and the bed portion; at least each other, a portion of said retaining means being shaped in a manner complementary to said concave shaped cover area so as to permit said retaining means to slide relative to said cover
  • a catalytic converter assembly in accordance with claim 1 characterized in that a fitting for adding or removing catalyst particles passes through and is joined to said metal housing and bed portion.

Landscapes

  • 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)
US418646A 1973-11-23 1973-11-23 Catalytic converter housing Expired - Lifetime US3899302A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US418646A US3899302A (en) 1973-11-23 1973-11-23 Catalytic converter housing
CA213,682A CA1012370A (en) 1973-11-23 1974-11-14 Catalytic converter housing
DE2454704A DE2454704C3 (de) 1973-11-23 1974-11-19 Katalytischer Umsetzer
IT54119/74A IT1023311B (it) 1973-11-23 1974-11-19 Custodia per convertitori catalitici particolarmente per bruciare i gas di scarico di autoveicoli
SE7414658A SE407261B (sv) 1973-11-23 1974-11-21 Katalytisk omvandlingsanordning
FR7438425A FR2252486B1 (it) 1973-11-23 1974-11-22
ES0432175A ES432175A1 (es) 1973-11-23 1974-11-22 Perfeccionamientos introducidos en un conjunto convertidor catalitico.
JP13541474A JPS578294B2 (it) 1973-11-23 1974-11-25
GB50893/74A GB1485848A (en) 1973-11-23 1974-11-25 Catalytic converter housing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US418646A US3899302A (en) 1973-11-23 1973-11-23 Catalytic converter housing

Publications (1)

Publication Number Publication Date
US3899302A true US3899302A (en) 1975-08-12

Family

ID=23658987

Family Applications (1)

Application Number Title Priority Date Filing Date
US418646A Expired - Lifetime US3899302A (en) 1973-11-23 1973-11-23 Catalytic converter housing

Country Status (9)

Country Link
US (1) US3899302A (it)
JP (1) JPS578294B2 (it)
CA (1) CA1012370A (it)
DE (1) DE2454704C3 (it)
ES (1) ES432175A1 (it)
FR (1) FR2252486B1 (it)
GB (1) GB1485848A (it)
IT (1) IT1023311B (it)
SE (1) SE407261B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237098A (en) * 1979-04-25 1980-12-02 General Motors Corporation Catalytic converter with housing-bed-plenum reinforcing and spacing means
US20030127923A1 (en) * 2002-01-04 2003-07-10 Siemens Vdo Automotive, Inc. Electric motor with integrated heat shield

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822966Y2 (ja) * 1978-02-14 1983-05-17 カルソニックカンセイ株式会社 消音器兼排気浄化装置
DE2824567A1 (de) * 1978-06-05 1979-12-06 Hoechst Ag Abgaskonverter fuer brennkraftmaschinen
JPS5528783U (it) * 1978-08-16 1980-02-25
JPS619488U (ja) * 1984-06-22 1986-01-20 サンセイアルミ株式会社 可動ガラリ戸の上框の構造
DE102022118914A1 (de) 2022-07-28 2024-02-08 Purem GmbH Abgasführungskomponente für eine Abgasanlage einer Brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828189A (en) * 1954-02-04 1958-03-25 Oxy Catalyst Inc Device for catalytically purifying exhaust gases
US2853367A (en) * 1954-02-10 1958-09-23 Oxy Catalyst Inc Cartridge type catalytic exhaust cleaner
US3600142A (en) * 1969-09-22 1971-08-17 Universal Oil Prod Co Catalytic converter
US3695851A (en) * 1970-10-26 1972-10-03 Universal Oil Prod Co Exhaust gas catalytic converter
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828189A (en) * 1954-02-04 1958-03-25 Oxy Catalyst Inc Device for catalytically purifying exhaust gases
US2853367A (en) * 1954-02-10 1958-09-23 Oxy Catalyst Inc Cartridge type catalytic exhaust cleaner
US3600142A (en) * 1969-09-22 1971-08-17 Universal Oil Prod Co Catalytic converter
US3695851A (en) * 1970-10-26 1972-10-03 Universal Oil Prod Co Exhaust gas catalytic converter
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237098A (en) * 1979-04-25 1980-12-02 General Motors Corporation Catalytic converter with housing-bed-plenum reinforcing and spacing means
US20030127923A1 (en) * 2002-01-04 2003-07-10 Siemens Vdo Automotive, Inc. Electric motor with integrated heat shield
US6674198B2 (en) * 2002-01-04 2004-01-06 Siemens Vdo Automotive Inc. Electric motor with integrated heat shield
US6859992B2 (en) 2002-01-04 2005-03-01 Siemens Vdo Automotive Inc. Method of providing a heat shield in an electric motor

Also Published As

Publication number Publication date
JPS578294B2 (it) 1982-02-16
SE7414658L (it) 1975-05-26
GB1485848A (en) 1977-09-14
DE2454704C3 (de) 1978-09-28
DE2454704B2 (de) 1978-02-09
CA1012370A (en) 1977-06-21
JPS5083619A (it) 1975-07-07
IT1023311B (it) 1978-05-10
DE2454704A1 (de) 1975-05-28
ES432175A1 (es) 1976-09-16
FR2252486B1 (it) 1979-08-10
SE407261B (sv) 1979-03-19
FR2252486A1 (it) 1975-06-20

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