US20050150222A1 - One piece catalytic converter with integral exhaust manifold - Google Patents

One piece catalytic converter with integral exhaust manifold Download PDF

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Publication number
US20050150222A1
US20050150222A1 US11022067 US2206704A US2005150222A1 US 20050150222 A1 US20050150222 A1 US 20050150222A1 US 11022067 US11022067 US 11022067 US 2206704 A US2206704 A US 2206704A US 2005150222 A1 US2005150222 A1 US 2005150222A1
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Patent type
Prior art keywords
converter
catalytic
exhaust system
system component
catalytic converter
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.)
Abandoned
Application number
US11022067
Inventor
Martin Kalish
Robert Purdy
Clinton McAllister
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WESCAST (USA)
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WESCAST (USA)
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/08Other arrangements or adaptations of exhaust conduits
    • F01N13/10Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/28Construction of catalytic reactors
    • F01N3/2839Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2857Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite

Abstract

The present invention relates to exhaust system assemblies and, more particularly, to a one piece catalytic converter can with an integral exhaust manifold. Disposed within the catalytic converter can are the catalytic conversion components. Coupled to the one piece converter can and integral exhaust manifold is a second end cone to provide a substantially air tight seal to the assembly.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application claims the benefit of U.S. Provisional Application No. 60/533,233, filed on Dec. 30, 2003. The disclosure(s) of the above application(s) is (are) incorporated herein by reference.
  • FIELD OF THE INVENTION
  • 1. Technical Field
  • The present invention relates to catalytic converters and, more particularly to a one piece catalytic converter can with an integral exhaust manifold. Preferably the integral catalytic converter can and exhaust manifold are formed as a unitary casting. While numerous materials may be suitable for casting the one piece catalytic converter and exhaust manifold, cast irons and, preferably SiMo cast irons are preferred.
  • In addition to the one piece catalytic converter with integral exhaust manifold, the present invention also relates to a method of welding an end cone to the one piece catalytic converter and integral exhaust manifold.
  • 2. Discussion of Prior Art
  • Catalytic converter assemblies are typically formed by mechanically fastening stamped or otherwise machined inlet cones, outlet cones and converter housings together to contain the conversion materials. Among the perceived drawbacks to this type of catalytic converter assembly are the costs associated with assembling multiple pieces to arrive at a useful component and the inherent gas leak paths associated with multi-piece components, especially those employing mechanical fasteners to join the pieces.
  • SUMMARY OF THE INVENTION
  • In a first instance, the present invention addresses the above described drawbacks, among others, by providing a catalytic converter assembly employing a one-piece catalytic converter can and integral exhaust manifold to limit the number of overall components in the assembly.
  • In addition to catalytic converter assemblies including a one piece catalytic converter can with integral manifold, the present invention also relates to a method of manufacturing catalytic converter assemblies by welding a second end cone or second end portion of an exhaust manifold to the one piece catalytic converter can and integral exhaust manifold.
  • DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of a catalytic converter assembly employing a one piece catalytic converter can and integral exhaust manifold according to the teachings of the present invention;
  • FIG. 2 is a cross-sectional view of a catalytic converter assembly employing a one piece catalytic converter housing and integral exhaust manifold according to the teachings of the present invention; and
  • FIG. 3 is a magnified sectional view of the inlet cone portion of the assembly.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to FIGS. 1 and 2, shown is a catalytic converter assembly 10 employing a one piece catalytic converter can and integral manifold assembly. The converter can portion is defined by reference numeral 12 and the manifold is defined by reference numeral 14. Generally, the catalytic converter can portion 12 houses the components necessary for converting the exhaust gases prior to discharge from the vehicle to the atmosphere. While not specifically shown, the converter can and/or the manifold portion of the assembly can be provided with various sensors to monitor gas flow through the system.
  • As illustrated, the catalytic conversion components inserted within the converter can portion 12 include a substrate 16 which is held in place by a mounting mat 18. Z-seals (not shown) which are known in the art, may be used in association with the mat to assist in securing the substrate within the converter can. The mounting mat is disposed adjacent the inner wall 34 of the converter can in the gap 36 occurring between the inner wall 20 of the converter can 12 and the outer surface 22 of the substrate 16. By employing a mounting mat in the gap, dimensional variations in converter can, the substrate or mounting mat material can be accommodated with what is considered to be a negligible effect on the overall performance of an exhaust system employing the integral assembly 10. The gap 36 can vary in size but preferably is between 3.5 and 7.5 mm. A properly sized gap allows for adherence to minimize and maximize pressure requirements both during installation of the substrate, which are known to be relatively fragile, and during the systems useful life. Importantly, the gap also allows for the use of a mounting mat made from a hybrid material of ceramics/metal which can be a significant cost savings.
  • The mounting mat 18 holds, cushions and thermally insulates the substrate. Mounting mats can be made of intumescent material such as vermiculite, non-intumescent material such as ceramic fibers, or a combination of intumescent and non-intumescent materials bound by an organic compound by way of non-limiting example. Preferably, the mat is non-intumescent and of a basis weight suitable to optimize the holding force, cushioning and insulation of the substrate.
  • As should be understood in the art, the substrate 16 is the filtering or exhaust gas conversion component of the assembly. While the substrate 16 is shown as a single piece, it should be understood that the substrate may include multiple pieces which is sometimes referred to as a “cascaded” system. The substrate pieces may be made from the same or different materials having varying catalytic properties. Likewise, the substrate pieces may be of the same or varying design. Additionally, sensors (not shown) may be incorporated into the substrate assembly to monitor and control the flow of exhaust gas through the assembly.
  • The integral exhaust manifold portion 14, itself can be described in terms of two distinct sections, namely the transition pipes 38, which are typically mounted to an engine block (not shown) and an inlet cone 40. As should be understood in the art, the inlet cone 40 is shaped internally along wall 42 to accumulate the exhaust gas entering from pipes 38 and to direct the gas flow to and through the substrate. Thus, the inlet cone 40 is narrower along the transition point with the transition pipes and is wider at the transition point with the converter housing.
  • As shown most clearly in FIG. 3, the inner wall 42 of the inlet cone 40 is provided with an annular inwardly projecting portion 44 in proximity to the mat 18 intended to divert exhaust gas away from the mat 18 and through the substrate 16. By providing the annular projection 36, the working life of the mat can be greatly extended.
  • Also depicted in FIGS. 1 and 2 is an outlet cone 24 which is shown as including a flange 46 for connection to a muffler assembly (not shown). It should be noted, however, that assembly 10 has applications for direct attachment to a muffler assembly. The one piece catalytic converter can 12 and integral manifold portion 14 forming assembly 10 when appropriately joined with the outlet cone 24, form a portion of the “hot end” of an exhaust system.
  • Coupling of the outlet cone 24 to the integral manifold assembly may be done mechanically, adhesively and/or via a weld joint 30. A preferred weld joint 30 is depicted whereby the converter can includes a first end 26 having a recess 28 for receiving the leading end 32 of the second cone 24 in a close fit relationship. Once the outlet cone 24 is inserted into the recess of the converter can portion, a circumferential weld can be carried out along the weld joint 30 to seal the assembly. In view of the fact that the outlet cone may be formed of a material other than that which is used to cast the integral assembly 10, care should be taken in selecting the appropriate weld wire material to insure that a secure weld occurs along the joint.
  • Among the numerous advantages of the one piece catalytic converter with integral exhaust manifold is the elimination of multiple coupling joints which in turn limits the number of potential leak paths along the assembly. As the number of coupling joints increases, the cost to assemble also tends to increase. Another advantage of the present invention is that the one piece catalytic converter with integral exhaust manifold can be cast from a suitable alloy such as SiMo cast iron by way of non-limiting example. Thus, it is believed that the embodiments presented herein represent a potential cost savings to the manufacturer.

Claims (16)

  1. 1. An exhaust system component comprising:
    a one piece catalytic converter can with integral exhaust manifold, said converter can including an opening for receiving catalytic conversion components.
  2. 2. The exhaust system component of claim 1, wherein said one piece catalytic converter can with integral exhaust manifold is formed by casting.
  3. 3. The exhaust system component of claim 2, wherein said casting is formed from SiMo iron.
  4. 4. The exhaust system component of claim 1, wherein said integral exhaust manifold includes at least one transition pipe and an inlet cone.
  5. 5. The exhaust component of claim 4, wherein said inlet cone includes an inner wall which is narrower along the transition point with said at least one transition pipe and wider along the transition point with said converter can.
  6. 6. The exhaust component of claim 5 wherein the inner wall of the inlet cone includes an annular inwardly projecting portion in proximity to the transition point with said converter can.
  7. 7. The exhaust system component of claim 1, further comprising a mounting mat disposed adjacent an inner wall of said converter can and a filtering substrate disposed within said mounting mat.
  8. 8. The exhaust system component of claim 7, wherein said filtering substrate includes multiple substrate pieces having varying catalytic properties.
  9. 9. The exhaust system component of claim 7, further comprising a second end cone which is coupled to said converter can.
  10. 10. The exhaust system component of claim 8, wherein said second end cone is coupled to the converter can by welding along a coupling joint.
  11. 11. The exhaust system component of claim 10, wherein said coupling joint includes a recess occurring along the opening of said converter can which receives the leading end of the second end cone in a close fit relationship.
  12. 12. A method of manufacturing an exhaust system assembly comprising the steps of:
    a) providing catalytic conversion components;
    b) providing a one piece catalytic converter can and integral exhaust manifold, said converter can including an opening for receiving said catalytic conversion components and said integral exhaust manifold including a first end cone;
    c) disposing the catalytic converter components within the opening of said catalytic converter can; and
    d) attaching a second end cone to said catalytic converter can to capture the catalytic converter components within said catalytic can.
  13. 13. The method of claim 12, wherein said one piece catalytic can and integral exhaust manifold is formed by casting.
  14. 14. The method of claim 13, wherein said casting is formed from SiMo iron.
  15. 15. The method of claim 12, wherein said second end cone is attached via welding along a coupling joint.
  16. 16. The method of claim 15, wherein said coupling joint includes a recess occurring along the opening of said converter can which receives the leading end of the second end cone in a close fit relationship.
US11022067 2003-12-30 2004-12-23 One piece catalytic converter with integral exhaust manifold Abandoned US20050150222A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US53323303 true 2003-12-30 2003-12-30
US11022067 US20050150222A1 (en) 2003-12-30 2004-12-23 One piece catalytic converter with integral exhaust manifold

Applications Claiming Priority (1)

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US11022067 US20050150222A1 (en) 2003-12-30 2004-12-23 One piece catalytic converter with integral exhaust manifold

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Cited By (38)

* Cited by examiner, † Cited by third party
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US20060076200A1 (en) * 2004-10-08 2006-04-13 Dessouki Omar S Coulomb friction damped disc brake rotors
US20070056815A1 (en) * 2005-09-15 2007-03-15 Hanna Michael D Bi-metal disc brake rotor and method of manufacturing
US20070062768A1 (en) * 2005-09-19 2007-03-22 Hanna Michael D Bi-metal disc brake rotor and method of manufacturing
US20070062664A1 (en) * 2005-09-20 2007-03-22 Schroth James G Method of casting components with inserts for noise reduction
US20070186546A1 (en) * 2006-02-16 2007-08-16 Indmar Products Company Inc. Manifold mounted catalytic converter
US20080099289A1 (en) * 2006-10-30 2008-05-01 Gm Global Technology Operations, Inc. Coulomb damped disc brake rotor and method of manufacturing
US20080185249A1 (en) * 2004-10-08 2008-08-07 Gm Global Technology Operations, Inc. Damped products and methods of making and using the same
US20090020256A1 (en) * 2007-07-20 2009-01-22 Gm Global Technology Operations, Inc. Method of casting damped part with insert
US20090020383A1 (en) * 2006-06-27 2009-01-22 Gm Global Technology Operations, Inc. Damped part
US20090022938A1 (en) * 2007-07-20 2009-01-22 Gm Global Technology Operations, Inc. Method of manufacturing a damped part
US20090035598A1 (en) * 2007-08-03 2009-02-05 Gm Global Technology Operations, Inc. Product with metallic foam and method of manufacturing the same
US20090032674A1 (en) * 2007-08-01 2009-02-05 Gm Global Technology Operations, Inc. Damped product with insert and method of making the same
US20090044923A1 (en) * 2007-08-17 2009-02-19 Gm Global Technology Operations, Inc. Casting Noise-Damped, Vented Brake Rotors With Embedded Inserts
US20090078520A1 (en) * 2007-09-24 2009-03-26 Gm Global Technology Operations, Inc. Insert with tabs and damped products and methods of making the same
US20090107787A1 (en) * 2007-10-29 2009-04-30 Gm Global Technology Operations, Inc. Inserts with holes for damped products and methods of making and using the same
US20090176122A1 (en) * 2008-01-04 2009-07-09 Gm Global Technology Operations, Inc. Method of forming casting with frictional damping insert
US7594568B2 (en) 2005-11-30 2009-09-29 Gm Global Technology Operations, Inc. Rotor assembly and method
US20090260931A1 (en) * 2008-04-18 2009-10-22 Gm Global Technology Operations, Inc. Filler material to dampen vibrating components
US20090269575A1 (en) * 2007-07-20 2009-10-29 Gm Global Technology Operations Inc. Damped product with an insert having a layer including graphite thereon and methods of making and using the same
US20100018819A1 (en) * 2008-07-24 2010-01-28 Gm Global Technology Operations, Inc. Friction damped brake drum
US20100122880A1 (en) * 2008-11-17 2010-05-20 Gm Global Technology Operations, Inc. Surface configurations for damping inserts
US20100140033A1 (en) * 2008-12-05 2010-06-10 Gm Global Technology Operations, Inc. Component with inlay for damping vibrations
US20100258394A1 (en) * 2009-04-08 2010-10-14 Gm Global Technology Operations, Inc. Brake rotor with intermediate portion
US7823763B2 (en) 2007-08-01 2010-11-02 Gm Global Technology Operations, Inc. Friction welding method and products made using the same
US20100276236A1 (en) * 2009-05-01 2010-11-04 Gm Global Technology Operations, Inc. Damped product and method of making the same
US20100282550A1 (en) * 2009-05-07 2010-11-11 Gm Global Technology Operations, Inc. Mode altering insert for vibration reduction in components
US20100294063A1 (en) * 2009-05-22 2010-11-25 Gm Global Technology Operations, Inc. Friction damped gears
US8020300B2 (en) 2007-08-31 2011-09-20 GM Global Technology Operations LLC Cast-in-place torsion joint
US8056233B2 (en) 2006-06-27 2011-11-15 GM Global Technology Operations LLC Method of manufacturing an automotive component member
US8104162B2 (en) 2008-04-18 2012-01-31 GM Global Technology Operations LLC Insert with filler to dampen vibrating components
US8210232B2 (en) 2007-09-20 2012-07-03 GM Global Technology Operations LLC Lightweight brake rotor and components with composite materials
US8714232B2 (en) 2010-09-20 2014-05-06 GM Global Technology Operations LLC Method of making a brake component
US8960382B2 (en) 2008-04-18 2015-02-24 GM Global Technology Operations LLC Chamber with filler material to dampen vibrating components
US20150089932A1 (en) * 2012-03-22 2015-04-02 Isuzu Motors Limited Internal combustion engine
USD731381S1 (en) * 2014-01-07 2015-06-09 Toyota Jidosha Kabushiki Kaisha Exhaust manifold
US9174274B2 (en) 2006-05-25 2015-11-03 GM Global Technology Operations LLC Low mass multi-piece sound dampened article
US9328641B2 (en) 2012-09-21 2016-05-03 Kohler Co. Power management system that includes a wet exhaust system
US9527132B2 (en) 2007-07-20 2016-12-27 GM Global Technology Operations LLC Damped part with insert

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US7975750B2 (en) 2004-10-08 2011-07-12 GM Global Technology Operations LLC Coulomb friction damped disc brake rotors
US20060076200A1 (en) * 2004-10-08 2006-04-13 Dessouki Omar S Coulomb friction damped disc brake rotors
US20080185249A1 (en) * 2004-10-08 2008-08-07 Gm Global Technology Operations, Inc. Damped products and methods of making and using the same
US8163399B2 (en) 2004-10-08 2012-04-24 GM Global Technology Operations LLC Damped products and methods of making and using the same
US7775332B2 (en) 2005-09-15 2010-08-17 Gm Global Technology Operations, Inc. Bi-metal disc brake rotor and method of manufacturing
US20070056815A1 (en) * 2005-09-15 2007-03-15 Hanna Michael D Bi-metal disc brake rotor and method of manufacturing
US20070062768A1 (en) * 2005-09-19 2007-03-22 Hanna Michael D Bi-metal disc brake rotor and method of manufacturing
US7937819B2 (en) 2005-09-19 2011-05-10 GM Global Technology Operations LLC Method of manufacturing a friction damped disc brake rotor
WO2007035206A2 (en) * 2005-09-20 2007-03-29 Gm Global Technology Operations, Inc. Method of casting components with inserts for noise reduction
WO2007035206A3 (en) * 2005-09-20 2007-11-08 Gm Global Tech Operations Inc Method of casting components with inserts for noise reduction
US20070062664A1 (en) * 2005-09-20 2007-03-22 Schroth James G Method of casting components with inserts for noise reduction
US7644750B2 (en) 2005-09-20 2010-01-12 Gm Global Technology Operations, Inc. Method of casting components with inserts for noise reduction
US7594568B2 (en) 2005-11-30 2009-09-29 Gm Global Technology Operations, Inc. Rotor assembly and method
US7788913B2 (en) 2006-02-16 2010-09-07 Indmar Products Company Inc. Manifold mounted catalytic converter
US20070186546A1 (en) * 2006-02-16 2007-08-16 Indmar Products Company Inc. Manifold mounted catalytic converter
US9174274B2 (en) 2006-05-25 2015-11-03 GM Global Technology Operations LLC Low mass multi-piece sound dampened article
US20090020383A1 (en) * 2006-06-27 2009-01-22 Gm Global Technology Operations, Inc. Damped part
US8056233B2 (en) 2006-06-27 2011-11-15 GM Global Technology Operations LLC Method of manufacturing an automotive component member
US8245758B2 (en) 2006-10-30 2012-08-21 GM Global Technology Operations LLC Coulomb damped disc brake rotor and method of manufacturing
US20080099289A1 (en) * 2006-10-30 2008-05-01 Gm Global Technology Operations, Inc. Coulomb damped disc brake rotor and method of manufacturing
US20090269575A1 (en) * 2007-07-20 2009-10-29 Gm Global Technology Operations Inc. Damped product with an insert having a layer including graphite thereon and methods of making and using the same
US9409231B2 (en) 2007-07-20 2016-08-09 GM Global Technology Operations LLC Method of casting damped part with insert
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US20090022938A1 (en) * 2007-07-20 2009-01-22 Gm Global Technology Operations, Inc. Method of manufacturing a damped part
US20090020256A1 (en) * 2007-07-20 2009-01-22 Gm Global Technology Operations, Inc. Method of casting damped part with insert
US9527132B2 (en) 2007-07-20 2016-12-27 GM Global Technology Operations LLC Damped part with insert
US8758902B2 (en) 2007-07-20 2014-06-24 GM Global Technology Operations LLC Damped product with an insert having a layer including graphite thereon and methods of making and using the same
US7938378B2 (en) 2007-08-01 2011-05-10 GM Global Technology Operations LLC Damped product with insert and method of making the same
US20090032674A1 (en) * 2007-08-01 2009-02-05 Gm Global Technology Operations, Inc. Damped product with insert and method of making the same
US7823763B2 (en) 2007-08-01 2010-11-02 Gm Global Technology Operations, Inc. Friction welding method and products made using the same
US20090035598A1 (en) * 2007-08-03 2009-02-05 Gm Global Technology Operations, Inc. Product with metallic foam and method of manufacturing the same
US8118079B2 (en) 2007-08-17 2012-02-21 GM Global Technology Operations LLC Casting noise-damped, vented brake rotors with embedded inserts
US20090044923A1 (en) * 2007-08-17 2009-02-19 Gm Global Technology Operations, Inc. Casting Noise-Damped, Vented Brake Rotors With Embedded Inserts
US8020300B2 (en) 2007-08-31 2011-09-20 GM Global Technology Operations LLC Cast-in-place torsion joint
US8210232B2 (en) 2007-09-20 2012-07-03 GM Global Technology Operations LLC Lightweight brake rotor and components with composite materials
US8962148B2 (en) 2007-09-20 2015-02-24 GM Global Technology Operations LLC Lightweight brake rotor and components with composite materials
US20090078520A1 (en) * 2007-09-24 2009-03-26 Gm Global Technology Operations, Inc. Insert with tabs and damped products and methods of making the same
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US20090107787A1 (en) * 2007-10-29 2009-04-30 Gm Global Technology Operations, Inc. Inserts with holes for damped products and methods of making and using the same
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US8091609B2 (en) 2008-01-04 2012-01-10 GM Global Technology Operations LLC Method of forming casting with frictional damping insert
US20090176122A1 (en) * 2008-01-04 2009-07-09 Gm Global Technology Operations, Inc. Method of forming casting with frictional damping insert
US8960382B2 (en) 2008-04-18 2015-02-24 GM Global Technology Operations LLC Chamber with filler material to dampen vibrating components
US20090260931A1 (en) * 2008-04-18 2009-10-22 Gm Global Technology Operations, Inc. Filler material to dampen vibrating components
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US9163682B2 (en) 2008-07-24 2015-10-20 GM Global Technology Operations LLC Friction damped brake drum
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