US3925026A - Spring loaded catalytic converter with externally mounted spring - Google Patents

Spring loaded catalytic converter with externally mounted spring Download PDF

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Publication number
US3925026A
US3925026A US498261A US49826174A US3925026A US 3925026 A US3925026 A US 3925026A US 498261 A US498261 A US 498261A US 49826174 A US49826174 A US 49826174A US 3925026 A US3925026 A US 3925026A
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Prior art keywords
catalyst element
flow
housing
spring
bearing member
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Expired - Lifetime
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US498261A
Inventor
Martin L Bray
Edward N Cole
Jr James A Haggart
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Motors Liquidation Co
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Motors Liquidation Co
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Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Priority to US498261A priority Critical patent/US3925026A/en
Priority to CA231,938A priority patent/CA1030778A/en
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Publication of US3925026A publication Critical patent/US3925026A/en
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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
    • F01N3/2875—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using elastic means, e.g. spring leaves, for retaining catalyst body in the 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion

Definitions

  • ABSTRACT In a catalytic converter having a casing with an inlet and outlet for exhaust gas flow and a peripheral catalyst element seat at one end, a monolithic catalystelement within the casing against the seat and a flow reversing baffle having a peripheral rim engaging the end of the catalyst opposite the seat, a load bearing member has a peripheral rim engaging the peripheral rim of the baffle and a central finger projecting outward through an opening in the casing into a ported retainer cup fixed to the outside of the casing; and a conical spring is compressed inside the cup with the large diameter end abutting the cup and the small diameter end engaging the finger to exert force through the load bearing member to hold the catalyst member firmly against the seat, the ported retainer cup allowing atmospheric air circulation over the spring for cooling.
  • This invention relates to catalytic converters for internal combustion engine exhaust systems and particularly to such converters having monolithic catalyst elements within a casing. It is desirable to hold such monolithic catalyst elements firmly in place within their casings to prevent chipping and breakage of the element during shock or vibration. However, it is advisable to plan for different rates of thermal expansion between the ceramic based catalyst element and the metal casmg.
  • One method of holding the catalyst element firmly within the casing while allowing for different thermal expansion between the element and the casing is to spring load the catalyst element within the casing with a spring stronger than any shock to which the converter is likely to be subjected.
  • the high temperatures usually maintained in the operation of such catalytic converters require special alloy springs to maintain their force characteristics; and this adds to the cost of such converters.
  • This invention provides for a spring loaded monolithic catalytic converter with the spring maintained outside the converter casing and exposed to atmospheric air for cooling.
  • This invention shows means whereby such a spring can exert a force on the catalytic element within the casing and discloses a converter with a high strength spring of a design especially suited to maintaining a compact outer size for the converter. Further details and advantages of this invention will be apparent from the drawing and following description of the preferred embodiment.
  • a combustion engine exhaust system includes a catalytic converter 10, an exhaust passage 12 for carrying exhaust gases to catalytic converter and another exhaust passage 14 for carrying exhaust gases from catalytic converter 10.
  • Exhaust gas passages 12 and 14 might be defined by an engine mounted exhaust manifold such as that partially shown at 16.
  • Catalytic converter 10 comprises a casing including a generally cylindrical shell 18 which is open at the axial end 20 nearest manifold 16 and has a small axially central opening 22 at the other axial end 24.
  • Retaining ring 26 is fixed around end 20 of shell 18 by welding or similar means.
  • the casing further comprises an annular end member 28 having a peripheral rim formed into a catalyst element seat 30 and pressed into open end 20 of shell 18.
  • the radially inner portion 32 of annular end member 28 fits around, and is sealingly fixed to, an inlet conduit 34 which is aligned axially with respect to cylindrical shell 18 and extends axially toward the other end 24 of shell 18.
  • Annular end member 28 also includes one or more outlet openings 36 therethrough.
  • Catalytic converter 10 is mounted directly on manifold 16, with the open end of shell 18 sealed with an O- ring 38 on an outer circular mounting seat 40 and inlet conduit 34 sealed by an O-ring 42 to an inner mounting 2 flange 44. With converter 10 thus mounted, inlet conduit 34 opens to exhaust passage 12; and outlet openings 36 open to exhaust passage 14. A plurality of clamps 46, bolted to manifold 16 by bolts 48, engage retaining ring 26 and maintain converter 10 in place.
  • a monolithic catalyst element 50 has one axial end 52 abutting catalyst seat 30 and a central axial opening 54 through which inlet conduit 34 extends. At the other end 56 of catalyst element 50, a 7
  • baffle 58 has a peripheral rim 60 which sealingly engages catalyst element 50 at its outer diameter.
  • a load bearing member 62 is disposed within shell 18 just beyond baffle 58.
  • Load bearing member 62 has a peripheral rim 64 which bears against peripheral rim 60 of baffle 58, a reinforcing disk 66 welded to the axial center thereof and a finger 68 fixed to the axial center of load bearing member 62 and reinforcing disk 66 and projecting outward through opening 22 in shell 18.
  • a ported retaining cup 70 having ports 72 therein is welded to end 24 of shell 18. Finger 68 thus projects into the volume enclosed by retaining cup 70.
  • a sealing washer 74 surrounds finger 68 in opening 22 and prevents exhaust to the atmosphere of any exhaust gases that may have escaped around baffle 58. Sealing washer 74 allows axial freedom of movement for finger 68 and thus for load bearing member 62.
  • a conical spring 76 within ported retaining cup 70, has a large diameter end 78 adjacent cup 70 and a small diameter end 80 engaging finger 68 by means of an adapter 82. Spring 76 is compressed within cup 70 and thus exerts an axial force through finger 68, load bearing member 62 and peripheral rim 60 of baffle 58 to hold catalyst element 50 firmly against catalyst element seat 30.
  • exhaust gases enter catalytic converter 10 from exhaust passage 12 through inlet conduit 34 and fiow toward the other end of converter '10, where flow reversing baffle 58 forces them to fiow back through catalyst element 50 and outlet openings 36 to exhaust passage 14.
  • Flow reversing baffle 58 thus prevents contact between the hot exhaust gases and load bearing member 62.
  • Spring 76 being outside shell 18 in ported retaining cup 70, is removed from the hot area of the converter 10 and exposed to atmospheric air circulating through ports 72 for cooling. The temperature of spring 76 is thus reduced to the point where less expensive spring steel may be used.
  • the conical design of spring 76 allows the coils to nest within each other upon compression so that the axial length of the spring is reduced to the maximum extent for compactness of the catalytic converter 10 and consequent maximum freedom of placement of catalytic converter 10 within a crowded vehicle engine compartment.
  • a catalytic converter for an engine exhaust system comprising, in combination: a generally cylindrical housing having an axially central inlet and an outlet at one end thereof for exhaust gas flow, a peripheral catalyst element seat at the one end thereof and an axially central opening at the other end thereof; a generally cylindrical monolithic catalyst element having one axial end positioned against the catalyst element seat, another axial end and a central axial opening therethrough extending between the axial ends and aligned with the housing inlet for conducting exhaust gases from the one axial end to the other; a flow-reversing baffle having a circumferential rim in sealing contact with the other axial end of the catalyst element, the baffle being effective to direct exhaust gas flow from the catalyst element opening radially outward and back through the catalyst element to the outlet; ported spring retaining means fixed to the other end of the housing outside the housing opening; spring means positioned in the spring retaining means for cooling by atmospheric air; and a load-bearing member positioned between the flow-reversing baffle and the other end of the housing,

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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)

Abstract

In a catalytic converter having a casing with an inlet and outlet for exhaust gas flow and a peripheral catalyst element seat at one end, a monolithic catalyst element within the casing against the seat and a flow reversing baffle having a peripheral rim engaging the end of the catalyst opposite the seat, a load bearing member has a peripheral rim engaging the peripheral rim of the baffle and a central finger projecting outward through an opening in the casing into a ported retainer cup fixed to the outside of the casing; and a conical spring is compressed inside the cup with the large diameter end abutting the cup and the small diameter end engaging the finger to exert force through the load bearing member to hold the catalyst member firmly against the seat, the ported retainer cup allowing atmospheric air circulation over the spring for cooling.

Description

Bray et al.
United States Patent 1 1 Dec.9,1975
Cole, Bloomfield Hills; James A. Haggart, Jr., Davison, all of Mich.
[73] Assignee:
[22] Filed:
General Motors Corporation,
Detroit, Mich.
Aug. 20, 1974 21 Appl. No.2 498,261
[52] US. Cl. 23/288 FC; 23/288 F [51] Int. Cl? B01J 8/00; F01N 3/15 [58] Field of Search..... 23/288 F, 288 FC; 138/108,
References Cited 1 UNITED STATES PATENTS Spackman 210/168 lnnes et a1. 23/288 F UX Ridgway..... 23/288 FC ux Thomas 23/288 FC Innes 23/288 F Hardis0n.... 23/288 FB X Lang et a1 23/288 FC UX Berger et a1 23/288 F VII/lil/I/II/I/III 3,801,289 4/1974 Wiley 23/288 FC 3,823,555 7/1974 23/288 FA UX 3,824,788 7/1974 Cole et a1 23/288 FC UX 3,838,977 10/1974 Warren 23/288 F Primary'ExaminerBarry S. Richman Attorney, Agent, or Firm-Robert M. Sigler [57] ABSTRACT In a catalytic converter having a casing with an inlet and outlet for exhaust gas flow and a peripheral catalyst element seat at one end, a monolithic catalystelement within the casing against the seat and a flow reversing baffle having a peripheral rim engaging the end of the catalyst opposite the seat, a load bearing member has a peripheral rim engaging the peripheral rim of the baffle and a central finger projecting outward through an opening in the casing into a ported retainer cup fixed to the outside of the casing; and a conical spring is compressed inside the cup with the large diameter end abutting the cup and the small diameter end engaging the finger to exert force through the load bearing member to hold the catalyst member firmly against the seat, the ported retainer cup allowing atmospheric air circulation over the spring for cooling.
1 Claim, 1 Drawing Figure VIIIIIIIIIII 15,
Dec. 9, 1975 SPRING LOADED CATALYTIC CONVERTER WITH EXTERNALLY MOUNTED SPRING BACKGROUND OF THE INVENTION This invention relates to catalytic converters for internal combustion engine exhaust systems and particularly to such converters having monolithic catalyst elements within a casing. It is desirable to hold such monolithic catalyst elements firmly in place within their casings to prevent chipping and breakage of the element during shock or vibration. However, it is advisable to plan for different rates of thermal expansion between the ceramic based catalyst element and the metal casmg.
One method of holding the catalyst element firmly within the casing while allowing for different thermal expansion between the element and the casing is to spring load the catalyst element within the casing with a spring stronger than any shock to which the converter is likely to be subjected. However, the high temperatures usually maintained in the operation of such catalytic converters require special alloy springs to maintain their force characteristics; and this adds to the cost of such converters.
SUMMARY OF THE INVENTION This invention provides for a spring loaded monolithic catalytic converter with the spring maintained outside the converter casing and exposed to atmospheric air for cooling. This invention shows means whereby such a spring can exert a force on the catalytic element within the casing and discloses a converter with a high strength spring of a design especially suited to maintaining a compact outer size for the converter. Further details and advantages of this invention will be apparent from the drawing and following description of the preferred embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the FIGURE, a combustion engine exhaust system includes a catalytic converter 10, an exhaust passage 12 for carrying exhaust gases to catalytic converter and another exhaust passage 14 for carrying exhaust gases from catalytic converter 10. Exhaust gas passages 12 and 14 might be defined by an engine mounted exhaust manifold such as that partially shown at 16.
Catalytic converter 10 comprises a casing including a generally cylindrical shell 18 which is open at the axial end 20 nearest manifold 16 and has a small axially central opening 22 at the other axial end 24. Retaining ring 26 is fixed around end 20 of shell 18 by welding or similar means.
The casing further comprises an annular end member 28 having a peripheral rim formed into a catalyst element seat 30 and pressed into open end 20 of shell 18. The radially inner portion 32 of annular end member 28 fits around, and is sealingly fixed to, an inlet conduit 34 which is aligned axially with respect to cylindrical shell 18 and extends axially toward the other end 24 of shell 18. Annular end member 28 also includes one or more outlet openings 36 therethrough.
Catalytic converter 10 is mounted directly on manifold 16, with the open end of shell 18 sealed with an O- ring 38 on an outer circular mounting seat 40 and inlet conduit 34 sealed by an O-ring 42 to an inner mounting 2 flange 44. With converter 10 thus mounted, inlet conduit 34 opens to exhaust passage 12; and outlet openings 36 open to exhaust passage 14. A plurality of clamps 46, bolted to manifold 16 by bolts 48, engage retaining ring 26 and maintain converter 10 in place.
Within shell 18, a monolithic catalyst element 50 has one axial end 52 abutting catalyst seat 30 and a central axial opening 54 through which inlet conduit 34 extends. At the other end 56 of catalyst element 50, a 7
flow reversing baffle 58 has a peripheral rim 60 which sealingly engages catalyst element 50 at its outer diameter. A load bearing member 62 is disposed within shell 18 just beyond baffle 58. Load bearing member 62 has a peripheral rim 64 which bears against peripheral rim 60 of baffle 58, a reinforcing disk 66 welded to the axial center thereof and a finger 68 fixed to the axial center of load bearing member 62 and reinforcing disk 66 and projecting outward through opening 22 in shell 18.
A ported retaining cup 70 having ports 72 therein is welded to end 24 of shell 18. Finger 68 thus projects into the volume enclosed by retaining cup 70. A sealing washer 74 surrounds finger 68 in opening 22 and prevents exhaust to the atmosphere of any exhaust gases that may have escaped around baffle 58. Sealing washer 74 allows axial freedom of movement for finger 68 and thus for load bearing member 62.
A conical spring 76, within ported retaining cup 70, has a large diameter end 78 adjacent cup 70 and a small diameter end 80 engaging finger 68 by means of an adapter 82. Spring 76 is compressed within cup 70 and thus exerts an axial force through finger 68, load bearing member 62 and peripheral rim 60 of baffle 58 to hold catalyst element 50 firmly against catalyst element seat 30.
In operation, exhaust gases enter catalytic converter 10 from exhaust passage 12 through inlet conduit 34 and fiow toward the other end of converter '10, where flow reversing baffle 58 forces them to fiow back through catalyst element 50 and outlet openings 36 to exhaust passage 14. Flow reversing baffle 58 thus prevents contact between the hot exhaust gases and load bearing member 62.
Spring 76, being outside shell 18 in ported retaining cup 70, is removed from the hot area of the converter 10 and exposed to atmospheric air circulating through ports 72 for cooling. The temperature of spring 76 is thus reduced to the point where less expensive spring steel may be used. The conical design of spring 76 allows the coils to nest within each other upon compression so that the axial length of the spring is reduced to the maximum extent for compactness of the catalytic converter 10 and consequent maximum freedom of placement of catalytic converter 10 within a crowded vehicle engine compartment.
The embodiment as described is only a preferred embodiment of this invention. Since equivalent embodiments will occur to those skilled in the art, this invention should be limited only by the claims which follow.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A catalytic converter for an engine exhaust system comprising, in combination: a generally cylindrical housing having an axially central inlet and an outlet at one end thereof for exhaust gas flow, a peripheral catalyst element seat at the one end thereof and an axially central opening at the other end thereof; a generally cylindrical monolithic catalyst element having one axial end positioned against the catalyst element seat, another axial end and a central axial opening therethrough extending between the axial ends and aligned with the housing inlet for conducting exhaust gases from the one axial end to the other; a flow-reversing baffle having a circumferential rim in sealing contact with the other axial end of the catalyst element, the baffle being effective to direct exhaust gas flow from the catalyst element opening radially outward and back through the catalyst element to the outlet; ported spring retaining means fixed to the other end of the housing outside the housing opening; spring means positioned in the spring retaining means for cooling by atmospheric air; and a load-bearing member positioned between the flow-reversing baffle and the other end of the housing, the load-bearing member having a peripheral rim positioned against the peripheral rim of the flow-reversing baffle and a centrally positioned finger projecting out of the housing in slidable sealing engagement with the housing through the housing opening into engagement with the spring means, whereby the force of the spring means is transmitted through the peripheral rims of the load-bearing member and flow-reversing baffle to the catalyst element to retain it firmly against the catalyst element seat, the load-bearing member being otherwise spaced from the flow-reversing baffle for minimum thermal contact therewith, whereby the flow-reversing baffle protects the loadbearing member from the hot exhaust gases.

Claims (1)

1. A CATALYTIC CONVETER FOR AN ENGINE EXHAUST SYSTEM COMPRISING, IN COMBINATION: A GENERALLY CYLINDRICAL HOUSING HAVING AN AXIALLY CENTRAL INLET AND AN OUTLET AT ONE END THEREOF FOR EXHAUST GAS FLOW, A PERIPHERAL CATALYST ELEMENT SEAT AT THE ONE END THEREOF AND AN AXIALLY CENTRAL OPENING AT THE OTHER END THEREOF:: A GENERALLY CYLINDRICAL MONOLITHIC CATALYST ELEMENT HAVING ONE AXIAL END POSITIONED AGAINST THE CATALYST ELEMENT SEAT, ANOTHER AXIAL END AND A CENTRAL AXIAL OPENING THERETHROUGH EXTENDING BETWEEN THE AXIAL ENDS AND ALIGNED WITH THE HOUSING INLET FOR CONDUCTING EXHAUST GASES FROM THE ONE AXIAL END TO THE OTHER; A FLOW-REVERSING BAFFLE HAVING A CIRCUMFERENTIAL RIM IN SEALING CONTACT WITH THE OTHER AXIAL END OF THE CATALYST ELEMENT, THE BAFFLE BEING EFFECTIVE TO DIRECT EXHAUST GAS FLOW FROM THE CATALYST ELEMENT OPENING RADICALLY OUTWARD AND BACK THROUGH THE CATALYST ELEMENT TO THE OUTLET; PORTED SPRING RETAINING MEANS FIXED TO THE OTHER END OF THE HOUSING OUTSIDE THE HOUSING OPENING; SPRING MEANS POSITIONED IN THE SPRING RETAINING MEANS FOR COOLING BY ATMOSPHERIC AIR; AND A LOAD-BEARING MEMBER POSITIONED BETWEEN THE FLOW-REVERSING BAFFLE AND THE OTHER END OF THE HOUSING, THE LOAD-BEARING MEMBER HAVING A PERIPHERAL RIM POSITIONED AGAINST THE PERIPHERAL RIM OF THE FLOW-REVERSING BAFFLE AND A CENTRALLY POSITIONED FINGER PROJECTING OUT OF THE HOUSING IN SLIDABLE SEALING ENGAGEMENT WITH THE HOUSING THROUGH THE HOUSING OPENING INTO ENGAGEMENT WITH THE SPRING MEANS, WHEREBY THE FORCE OF THE SPRING MEANS IS TRANSMITTED THROUGH THE PERIPHERAL RIMS OF THE LOAD-BEARING MEMBER AND FLOW-REVERSING BAFFLE TO THE CATALYST ELEMENT TO RETAIN IT FIRMLY AGAINST THE CATALYST ELEMENT SEAT, THE LOAD-BEARING MEMBER BEING OTHERWISE SPACED FROM THE FLOW-REVERSING BAFFLE FOR MINIMUM THERMAL CONTACT THEREWITH, WHEREBY THE FLOW-REVERSING BAFFLE PROTECTS THE LOAD-BEARING MEMBER FROM THE HOT-EXHAUST GASES.
US498261A 1974-08-20 1974-08-20 Spring loaded catalytic converter with externally mounted spring Expired - Lifetime US3925026A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3107897A1 (en) * 1980-03-03 1982-04-01 Nissan Motor Co., Ltd., Yokohama, Kanagawa Exhaust system of a multicylinder internal combustion engine
US10151230B2 (en) 2015-05-08 2018-12-11 Corning Incorporated Housing, fluid stream treatment article, exhaust system and methods of manufacturing
US10465585B2 (en) 2015-03-23 2019-11-05 Corning Incorporated Exhaust gas treatment article and methods of manufacturing same
US10513977B2 (en) 2018-03-06 2019-12-24 Hamilton Sundstrand Corporation Adjustable snap action passive inline air valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927658A3 (en) * 2008-02-15 2009-08-21 Renault Sas Exhaust gas treating device for particle filter in internal combustion engine of motor vehicle, has case receiving ceramic body for treating exhaust gas, and maintaining unit maintaining ceramic body in translation inside case

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844611A (en) * 1930-02-10 1932-02-09 Stewart Warner Corp Oil filter
US3094394A (en) * 1960-07-22 1963-06-18 American Cyanamid Co Catalytic muffler
US3211534A (en) * 1963-12-19 1965-10-12 Trw Inc Exhaust control apparatus
US3445196A (en) * 1966-06-06 1969-05-20 Nelson Muffler Corp Exhaust muffler with removable catalytic unit
US3449086A (en) * 1964-09-22 1969-06-10 American Cyanamid Co Catalytic muffler
US3544264A (en) * 1968-09-25 1970-12-01 Universal Oil Prod Co Method and means for two-stage catalytic treating of engine exhaust gases
US3730691A (en) * 1971-04-26 1973-05-01 Ford Motor Co Multiple bed catalytic converter
US3775064A (en) * 1970-09-19 1973-11-27 H Berger Apparatus for detoxifying exhaust emissions of an internal-combustion engine
US3801289A (en) * 1972-05-19 1974-04-02 Corning Glass Works Catalytic converter
US3823555A (en) * 1972-04-26 1974-07-16 Gen Motors Corp Internal combustion engine and method of operation for exhaust emission control
US3824788A (en) * 1972-04-26 1974-07-23 Gen Motors Corp Internal combustion engine and method of operation for exhaust emission control
US3838977A (en) * 1972-02-24 1974-10-01 Ethyl Corp Catalytic muffler

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844611A (en) * 1930-02-10 1932-02-09 Stewart Warner Corp Oil filter
US3094394A (en) * 1960-07-22 1963-06-18 American Cyanamid Co Catalytic muffler
US3211534A (en) * 1963-12-19 1965-10-12 Trw Inc Exhaust control apparatus
US3449086A (en) * 1964-09-22 1969-06-10 American Cyanamid Co Catalytic muffler
US3445196A (en) * 1966-06-06 1969-05-20 Nelson Muffler Corp Exhaust muffler with removable catalytic unit
US3544264A (en) * 1968-09-25 1970-12-01 Universal Oil Prod Co Method and means for two-stage catalytic treating of engine exhaust gases
US3775064A (en) * 1970-09-19 1973-11-27 H Berger Apparatus for detoxifying exhaust emissions of an internal-combustion engine
US3730691A (en) * 1971-04-26 1973-05-01 Ford Motor Co Multiple bed catalytic converter
US3838977A (en) * 1972-02-24 1974-10-01 Ethyl Corp Catalytic muffler
US3823555A (en) * 1972-04-26 1974-07-16 Gen Motors Corp Internal combustion engine and method of operation for exhaust emission control
US3824788A (en) * 1972-04-26 1974-07-23 Gen Motors Corp Internal combustion engine and method of operation for exhaust emission control
US3801289A (en) * 1972-05-19 1974-04-02 Corning Glass Works Catalytic converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3107897A1 (en) * 1980-03-03 1982-04-01 Nissan Motor Co., Ltd., Yokohama, Kanagawa Exhaust system of a multicylinder internal combustion engine
US10465585B2 (en) 2015-03-23 2019-11-05 Corning Incorporated Exhaust gas treatment article and methods of manufacturing same
US10151230B2 (en) 2015-05-08 2018-12-11 Corning Incorporated Housing, fluid stream treatment article, exhaust system and methods of manufacturing
US10513977B2 (en) 2018-03-06 2019-12-24 Hamilton Sundstrand Corporation Adjustable snap action passive inline air valve

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