US3822763A - Anti-noise rocker arm cover - Google Patents

Anti-noise rocker arm cover Download PDF

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Publication number
US3822763A
US3822763A US00294254A US29425472A US3822763A US 3822763 A US3822763 A US 3822763A US 00294254 A US00294254 A US 00294254A US 29425472 A US29425472 A US 29425472A US 3822763 A US3822763 A US 3822763A
Authority
US
United States
Prior art keywords
cover
pad
noise
rocker arm
engine
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
US00294254A
Other languages
English (en)
Inventor
N Jones
R Treick
R Adams
G Bragg
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor 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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to US00294254A priority Critical patent/US3822763A/en
Priority to CA181,846A priority patent/CA975640A/en
Priority to GB4556373A priority patent/GB1396672A/en
Priority to DE19732349597 priority patent/DE2349597A1/de
Priority to BE136222A priority patent/BE805522A/xx
Priority to FR7335231A priority patent/FR2201717A5/fr
Priority to JP48110898A priority patent/JPS4971336A/ja
Application granted granted Critical
Publication of US3822763A publication Critical patent/US3822763A/en
Priority to JP1982002612U priority patent/JPS57145735U/ja
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation

Definitions

  • Caterpillar Tractor (30., Peoria, 111;
  • a rocker arm cover is attached to an internal combustion engine by circumferentially disposed cap screws which extend through a peripheral flange formed on the cover.
  • An elastomeric gasket is disposed between the flange and the engine to form a static seal thereat.
  • An elastomeric, noise-suppressing pad is bonded to an outer surface of the cover and to a plate, overlying the pad.
  • the pad constitutes a continuous sheet which is substantially coextensive with the top wall of the cover whereas in a second embodiment the pad constitutes an endless strip.
  • An object of this invention is to provide a cover assembly for an engine which substantially suppresses noise levels during engine operation.
  • the cover assembly comprises a cover having a peripheral flange formed thereon and attached to the engine, an elastomeric gasket compressed between the flange and the engine to form a static seal thereat and at least one elastomeric, noise-suppressing pad bonded between the cover and an outer plate.
  • FIG. I is a transverse, cross sectional view of an antinoise rocker arm cover assembly attached to an engine
  • FIG. 2 illustrates a modification of the rocker arm cover.
  • FIG. 1 illustrates a rocker arm cover assembly removably attached to the cylinder head or block of an internal combustion engine 11.
  • the cover completely encloses the rocker arms and attendant mechanisms (not shown) to protect them against damage and to prevent the egress of lubricating oil therefrom.
  • a cover which may constitute die-cast aluminum or the like, comprises vertical sidewalls l2 and a top wall 113.
  • the top wall preferably forms a inverted V-shape to define a longitudinally extending ridge 14 on the cover assembly.
  • An inverted U-shaped flange 15 extends transversely from the sidewalls and circumvents the cover assembly.
  • the flange comprises vertically disposed and parallel inner and outer legs 16 and. 17 which define a continuous channel 18 having an elastomeric gasket l9 disposed therein.
  • a plurality of attaching means, such as cap screws 20, project through the flange and the gasket for compressing the gasket to form a static seal thereat, completely around the cover assembly.
  • the predetermined degree of compression imparted to the gasket by the cap screws is precisely achieved by stop means comprising the extremities of the legs which are drawn into abutting engagement with a top planar surface 21 of the engine.
  • FIG. 1 further illustrates an elastomeric, noisesuppressing pad means 22 bonded to an outer surface of cover 13 by a standard bonding agent.
  • the pad means may comprise a continuous sheet of elastomeric material, such as fifty durometer nitrile rubber.
  • transverse end portions of the pad means terminate closely adjacent to sidewalls 12 of the cover and extend longitudinally thereon substantially the full length of the cover.
  • the first and second wall thicknesses of cover top wall 13 and pad means 22, respectively are substantially equal (e.g., one-eighth of an inch) and the third wall thickness of plate 23 is substantially one-half of each of such first and second thicknesses (e.g., one-sixteenth of an inch).
  • the above first thickness is substantially two times the second wall thickness whereas the second wall thickness is substantially two times the third wall thickness.
  • FIG. 2 illustrates a modification of the FIG. I cover assembly embodiment wherein like numerals are em ployed to depict corresponding structures.
  • the pad means constitutes an endless elastomeric strip 22a extending longitudinally of the cover closely adjacent the sidewalls 12 and extending transversely at opposite ends of the cover in inwardly marginally spaced relation to the plate 23.
  • a substantially enclosed opening 24 is thus defined centrally of the strip which extends substantially the full length of the cover assembly.
  • An engine having an anti-noise cover assembly attached thereto said cover assembly comprising a cover having a peripheral flange formed therearound, said flange forming an inverted U-shape in cross section to comprise vertically disposed and parallel inner and outer legs defining a continuous channel therearound,
  • an elastomeric gasket disposed in said channel be- I tween said flange and said engine
  • elastomeric, noise isolating pad means bonded to an outer surface of a top wall of said cover and having transverse end portions thereof terminating closely adjacent to respective transverse sides of said cover, and
  • cover assembly constitutes a rocker arm cover assembly having said top wall forming an inverted V-shape in transverse cross section to define a longitudinally extending ridge on said cover assembly.
  • first and second wall thicknesses of the top wall of said cover and said pad means, respectively, are substantially equal and wherein a third wall thickness of said plate is substantially one-half of each of said first and second wall thicknesses.
  • a first wall thickness of the top wall of said cover is substantially two times a second wall thickness of said pad means and wherein the second wall thickness is substantially two times a third wall thickness of said plate.
  • said pad means constitutes an endless strip extending in inwardly marginally spaced relation to said plate.
  • An anti-noise cover assembly comprising a cover having a peripheral flange formed therearound, said flange forming an inverted U-shape in cross section to comprise vertically disposed and parallel inner and outer legs defining a continuous channel therearound adapted to retain a gasket therein,
  • elastomeric, noise isolating pad means bonded to an outer surface ofa top wall of said cover and having transverse end portions thereof terminating closely adjacent to respective transverse sides of said cover, and
  • said cover constitutes a rocker arm cover having said top wall forming an inverted V-shape in transverse cross section to define a longitudinally extending ridge on said cover.
  • first and second wall thicknesses of the top wall of said cover and said pad means, respectively, are substantially equal and wherein a third wall thickness of said plate is substantially one-half of each of said first and second wall thicknesses.
  • a first wall thickness of the top wall of said cover is substantially two times a second wall thickness of said pad means and wherein the second wall thickness is substantially two times a third wall thickness of said plate

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Superstructure Of Vehicle (AREA)
  • Gasket Seals (AREA)
US00294254A 1972-10-02 1972-10-02 Anti-noise rocker arm cover Expired - Lifetime US3822763A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00294254A US3822763A (en) 1972-10-02 1972-10-02 Anti-noise rocker arm cover
CA181,846A CA975640A (en) 1972-10-02 1973-09-25 Anti-noise rocker arm cover
GB4556373A GB1396672A (en) 1972-10-02 1973-09-28 Anti-noise rocker arm cover
DE19732349597 DE2349597A1 (de) 1972-10-02 1973-09-29 Motorabdeckung
BE136222A BE805522A (fr) 1972-10-02 1973-10-01 Montage de couvercle pour mecanisme afin de supprimer les bruits
FR7335231A FR2201717A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-10-02 1973-10-02
JP48110898A JPS4971336A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-10-02 1973-10-02
JP1982002612U JPS57145735U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-10-02 1982-01-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00294254A US3822763A (en) 1972-10-02 1972-10-02 Anti-noise rocker arm cover

Publications (1)

Publication Number Publication Date
US3822763A true US3822763A (en) 1974-07-09

Family

ID=23132565

Family Applications (1)

Application Number Title Priority Date Filing Date
US00294254A Expired - Lifetime US3822763A (en) 1972-10-02 1972-10-02 Anti-noise rocker arm cover

Country Status (7)

Country Link
US (1) US3822763A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (2) JPS4971336A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE805522A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA975640A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2349597A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2201717A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1396672A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869859A (en) * 1974-01-17 1975-03-11 Gen Motors Corp Engine and valve cover therefor having integral air gallery
US4019600A (en) * 1975-06-09 1977-04-26 Caterpillar Tractor Co. Anti-noise mounting means for transmissions
US4027644A (en) * 1975-06-26 1977-06-07 Cummins Engine Company, Inc. Isolated engine cover
US4046128A (en) * 1974-10-28 1977-09-06 Fiat Societa Per Azioni Cylinder heads for internal combustion compression-ignition engines
US4066058A (en) * 1976-05-12 1978-01-03 Deere & Company Vibration isolation system
US4202311A (en) * 1977-07-27 1980-05-13 Toyo Kogyo Co., Ltd. Means for resiliently connecting an oil pan to an engine body
US4471731A (en) * 1979-12-18 1984-09-18 Cummins Engine Company, Inc. Rocker housing and rocker cover
US4480609A (en) * 1980-10-23 1984-11-06 Nissan Motor Company, Limited Front cover of automotive engine
US4563965A (en) * 1984-08-02 1986-01-14 Marvel Specialty Company Acoustical shield assembly and mating thread preguide unit
US4959033A (en) * 1989-05-12 1990-09-25 Outboard Marine Corporation Marine propulsion device cover arrangement
US5367993A (en) * 1994-01-21 1994-11-29 Navistar International Transportation Corp. Valve cover joint seal assembly
US6129494A (en) * 1994-12-23 2000-10-10 Schmalbach-Lubeca Ag Compound dip process for metal cans
US20020170775A1 (en) * 2001-04-24 2002-11-21 Stein Hans-Joachim Vom Lid for muffling noises produced by an internal combustion engine, and method for producing such lid
US20040188165A1 (en) * 2003-03-24 2004-09-30 Miller Alan S. Engine cover with internal vibration damping plates
US20050279567A1 (en) * 2004-06-17 2005-12-22 Kyowa Sangyo Co., Ltd. Blocking devices for hollow structures
US20060041227A1 (en) * 2004-08-23 2006-02-23 Kyowa Sangyo Co., Ltd. Devices for blocking spaces defined within hollow structures
US20060169531A1 (en) * 2003-12-23 2006-08-03 Christine Volker Component that absorbs airborne sound
ES2276584A1 (es) * 2004-04-20 2007-06-16 Honda Motor Co., Ltd. Estructura insonorizada en unidad de potencia.
US20070169991A1 (en) * 2003-06-26 2007-07-26 Ulrich Bertsch Device and method for heat and noise insulation of motor vehicles
US20100037848A1 (en) * 2008-08-14 2010-02-18 Ford Global Technologies, Llc Valve cover with decoupled nvh isolation and sealing features
US20100252357A1 (en) * 2005-12-28 2010-10-07 Kashirou Fukami Sound insulation structure of internal combustion engine
US20120037116A1 (en) * 2008-12-30 2012-02-16 Volvo Lastvagnar Ab Engine arrangement comprising a noise shield
CN101302946B (zh) * 2007-05-07 2012-06-13 通用汽车环球科技运作公司 用于内燃机的盖组件
US9091205B2 (en) 2012-04-27 2015-07-28 Ruben Santos Rocker arm accessibility cover assembly
US20170037851A1 (en) * 2014-04-11 2017-02-09 Magna Powertrain Huckeswagen GmbH Motor vehicle vacuum pump having an adhesive
CN112780879A (zh) * 2019-11-08 2021-05-11 山下橡胶株式会社 维护用罩部件

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848503C2 (de) * 1978-11-08 1983-05-05 Alcan Aluminiumwerk Nürnberg GmbH, 6000 Frankfurt Maschinengehäuse mit einem eine relativ geringe Wandstärke aufweisenden Bauteil
DE2928233C2 (de) * 1979-07-12 1984-06-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Vorrichtung zur Dämpfung des von einem Druckbalken eines Druckers ausgehenden Geräusches
DE3028825C2 (de) * 1980-07-30 1984-09-13 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Dämpfungsbelag
JPS5744952U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1980-08-28 1982-03-12
DE3042988A1 (de) * 1980-11-14 1982-07-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Gehaeusedeckel zur abdichtung des steuerraederkastens einer brennkraftmaschine
JPS5922946U (ja) * 1982-07-31 1984-02-13 日野自動車株式会社 シリンダヘツドカバ−
DE19914934C2 (de) * 1999-04-01 2002-02-28 Man Nutzfahrzeuge Ag Geräuschgedämmtes Maschinengehäuse
US20070014418A1 (en) * 2005-07-14 2007-01-18 Eatwell Graham P Vibration excited sound absorber with dynamic tuning
DE202006014707U1 (de) * 2006-09-21 2008-02-14 Mann+Hummel Gmbh Dichtung für eine dichte Verbindung zweier Formteile
DE102007013494A1 (de) * 2007-03-21 2008-09-25 Zf Friedrichshafen Ag Gussgehäuse
FR2934013B1 (fr) * 2008-07-16 2011-12-09 Mann & Hummel Gmbh Procede permettant d'attenuer les bruits generes par une piece du moteur d'un vehicule automobile

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869859A (en) * 1974-01-17 1975-03-11 Gen Motors Corp Engine and valve cover therefor having integral air gallery
US4046128A (en) * 1974-10-28 1977-09-06 Fiat Societa Per Azioni Cylinder heads for internal combustion compression-ignition engines
US4019600A (en) * 1975-06-09 1977-04-26 Caterpillar Tractor Co. Anti-noise mounting means for transmissions
US4027644A (en) * 1975-06-26 1977-06-07 Cummins Engine Company, Inc. Isolated engine cover
US4066058A (en) * 1976-05-12 1978-01-03 Deere & Company Vibration isolation system
US4202311A (en) * 1977-07-27 1980-05-13 Toyo Kogyo Co., Ltd. Means for resiliently connecting an oil pan to an engine body
US4471731A (en) * 1979-12-18 1984-09-18 Cummins Engine Company, Inc. Rocker housing and rocker cover
US4480609A (en) * 1980-10-23 1984-11-06 Nissan Motor Company, Limited Front cover of automotive engine
US4563965A (en) * 1984-08-02 1986-01-14 Marvel Specialty Company Acoustical shield assembly and mating thread preguide unit
US4959033A (en) * 1989-05-12 1990-09-25 Outboard Marine Corporation Marine propulsion device cover arrangement
US5367993A (en) * 1994-01-21 1994-11-29 Navistar International Transportation Corp. Valve cover joint seal assembly
US6129494A (en) * 1994-12-23 2000-10-10 Schmalbach-Lubeca Ag Compound dip process for metal cans
US20020170775A1 (en) * 2001-04-24 2002-11-21 Stein Hans-Joachim Vom Lid for muffling noises produced by an internal combustion engine, and method for producing such lid
US6896098B2 (en) * 2001-04-24 2005-05-24 Ab Skf Lid for muffling noises produced by an internal combustion engine, and method for producing such lid
US20040188165A1 (en) * 2003-03-24 2004-09-30 Miller Alan S. Engine cover with internal vibration damping plates
US6834741B2 (en) * 2003-03-24 2004-12-28 General Motors Corporation Engine cover with internal vibration damping plates
US20070169991A1 (en) * 2003-06-26 2007-07-26 Ulrich Bertsch Device and method for heat and noise insulation of motor vehicles
US20060169531A1 (en) * 2003-12-23 2006-08-03 Christine Volker Component that absorbs airborne sound
ES2276584B1 (es) * 2004-04-20 2008-05-16 Honda Motor Co., Ltd. Estructura insonorizada en unidad de potencia.
ES2276584A1 (es) * 2004-04-20 2007-06-16 Honda Motor Co., Ltd. Estructura insonorizada en unidad de potencia.
US20050279567A1 (en) * 2004-06-17 2005-12-22 Kyowa Sangyo Co., Ltd. Blocking devices for hollow structures
US7422088B2 (en) * 2004-06-17 2008-09-09 Kyowa Sangyo Co., Ltd. Blocking devices for hollow structures
US20060041227A1 (en) * 2004-08-23 2006-02-23 Kyowa Sangyo Co., Ltd. Devices for blocking spaces defined within hollow structures
US20100252357A1 (en) * 2005-12-28 2010-10-07 Kashirou Fukami Sound insulation structure of internal combustion engine
CN101302946B (zh) * 2007-05-07 2012-06-13 通用汽车环球科技运作公司 用于内燃机的盖组件
US8141531B2 (en) * 2008-08-14 2012-03-27 Ford Global Technologies, Llc Valve cover with decoupled NVH isolation and sealing features
US20100037848A1 (en) * 2008-08-14 2010-02-18 Ford Global Technologies, Llc Valve cover with decoupled nvh isolation and sealing features
US20120037116A1 (en) * 2008-12-30 2012-02-16 Volvo Lastvagnar Ab Engine arrangement comprising a noise shield
US8602155B2 (en) * 2008-12-30 2013-12-10 Volvo Lastvagnar Ab Engine arrangement comprising a noise shield
US9091205B2 (en) 2012-04-27 2015-07-28 Ruben Santos Rocker arm accessibility cover assembly
US20170037851A1 (en) * 2014-04-11 2017-02-09 Magna Powertrain Huckeswagen GmbH Motor vehicle vacuum pump having an adhesive
US10094383B2 (en) * 2014-04-11 2018-10-09 Magna Powertrain Bad Homburg GmbH Motor vehicle vacuum pump having an adhesive
CN112780879A (zh) * 2019-11-08 2021-05-11 山下橡胶株式会社 维护用罩部件
US11267413B2 (en) * 2019-11-08 2022-03-08 Yamashita Rubber Co., Ltd. Maintenance cover member

Also Published As

Publication number Publication date
JPS57145735U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1982-09-13
CA975640A (en) 1975-10-07
DE2349597A1 (de) 1974-04-18
BE805522A (fr) 1974-04-01
FR2201717A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-26
JPS4971336A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-10
GB1396672A (en) 1975-06-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515

Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515