US3835956A - Intake silencer for an internal combustion engine - Google Patents

Intake silencer for an internal combustion engine Download PDF

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Publication number
US3835956A
US3835956A US00359303A US35930373A US3835956A US 3835956 A US3835956 A US 3835956A US 00359303 A US00359303 A US 00359303A US 35930373 A US35930373 A US 35930373A US 3835956 A US3835956 A US 3835956A
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US
United States
Prior art keywords
base board
cover
silencer
carburetor
intake
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
US00359303A
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English (en)
Inventor
N Kishira
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Application granted granted Critical
Publication of US3835956A publication Critical patent/US3835956A/en
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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10347—Moulding, casting or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1227—Flow throttling or guiding by using multiple air intake flow paths, e.g. bypass, honeycomb or pipes opening into an expansion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1233—Flow throttling or guiding by using expansion chambers in the air intake flow path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1283—Manufacturing or assembly; Connectors; Fixations

Definitions

  • ABSTRACT Foreign Application Priority Data
  • An intake silencer for an internal combustion engine M 13, 1972 J 47-55724 dy dpdn disposed on the intake side of a carburetor has an ex- 52 us.
  • a 47 R 57 disposed air horns connected to the carburetor and H silencer tubes introducing the external air into the chamber.
  • the base board and silencer tubes are inte-
  • This invention relates to an intake silencer and more particularly to an intake silencer for a small capacity internal combustion engine.
  • the intake side of a carburetor is provided with a device for preventing those portions of such vehicles which are located near the engine from being stained by the so-called blow back of a sucked air-fuelmixture from the engine and also for reducing engine suction noises.
  • a device for preventing those portions of such vehicles which are located near the engine from being stained by the so-called blow back of a sucked air-fuelmixture from the engine and also for reducing engine suction noises.
  • the conventional type of such device is accompanied with various drawbacks, failing fully to meet users demand.
  • a typical type among such devices of the prior art capable of fully attaining the desired effect of silencing engine suction noises and preventing the above-mentioned blow back has the shortcomings that it is not only of complicated structure resulting in high production cost, subject to frequent failures, and difficult to handle, but also has such a great weight that its fitting applies excess stresses to the carburetor and its joint with the engine, often leading to the damage thereof.
  • Another object of the invention is to provide an intake silencer which, when fitted to an internal combustion engine, saves itself and the carburetor from undue stresses caused by the shaking of the engine during its operation.
  • Still another object of the invention is to provide an intake silencer which facilitates the replacement of an air horn undertaken to change engine characteristics.
  • FIG. 1 is a side view, partly in section, of an intake silencer embodying this invention and fitted to a carburetor;
  • FIG. 2 is a cross sectional view along line 22 of FIG. 1;
  • FIG. 3 is an enlarged cross sectional view of the joint of the fitting plate and base board of the intake silencer
  • FIG. 4 is a perspective view of a packing used in the joint of FIG. 3;
  • FIG. 5 is an enlarged cross sectional view of the joint of the base board and its cover of the intake silencer.
  • a referential numeral 11 shows a carburetor connected at one end to the internal combustion engine (not shown) of, for example, a snow vehicle and at the other end provided with an intake port 12. Coaxially to said intake port 12 is detachably fitted a flared air horn or funnel 13 by the later described means.
  • a rectangular fitting plate 15 made of sheet metal.
  • a fitting plate 15 made of sheet metal.
  • the flange 11a of the intake port 12, the fitting plate 15 and the air horn 13 are fixed in place by screws 14 inserted therethrough from the side of the air horn 13.
  • the fitting plate 15 is bored with two openings 15a corresponding to the intake ports 12 of two carburators 11, said openings enabling the intake ports 12 to communicate with the air horns 13.
  • a base board 16 shaped like a shallow pan with a continuous rim 16a and pro vided at the bottom with a rectangular through hole or an opening 17 into which the air horns 13 are inserted.
  • Said base board 16 is fixed to the fitting plate 15 on the peripheral edge of the through hole 17 by screws 18 and nuts 19.
  • an elastic packing 21 for example, a rubber packing shown in FIG. 4.
  • This packing 21 consists of a rectangular rim member 21a whose dimensions are large enough to surround the through hole 17, smaller ring members 21b provided in the same number as the screws 18 (in this embodiment there are used six smaller diameter ring members 21b arranged at nearly equal peripheral distance apart) and cylindrical members 210 (similarly six in this embodiment) which are coaxially inserted into holes 16b so as to connect the rim member 21a to the smaller ring members 21b.
  • cylindrical members 210 Into the cylindrical members 210 are coaxially fitted collars 20 through which the screws 18 project beyond the fitting plate 15 with the projecting portions tightened by nuts 19. As the result, the fitting plate 15 and base board 16 are connected by the elastic packing 21 in airtight and elastic relationship.
  • the base board 16 is provided with a large number of the later described silencer tubes 22 disposed parallel with the air horns 13 and projecting into a later described expansion chamber 24 at right angles to said base board 16.
  • the base board 16 and silencer tubes 22 are integrally molded from synthetic resin.
  • To the peripheral edge of the rim 16a of the base board 16 is detachably fitted a cover 23 shaped like a pot with a continuous side wall 23a and made of synthetic resin.
  • the base board 16 and cover 23 define an expansion chamber 24.
  • the air horns 13 also project into the expansion chamber 24 with a considerable space allowed, as apparent from FIG. 1, between the inner wall of the expansion chamber 24 and the projecting end of each air horn 13.
  • the cover 23 is detachably fitted to the base board 16, for example, in the following manner.
  • a pair of engagement grooves 31 (FIG. 5).
  • an outwardly extending fixing projection 25 On that side of the rim 16a of the base board 16 which is disposed opposite to said engagement grooves 31 is provided an outwardly extending fixing projection 25.
  • a metal collar 26 Into the end face of the projection 25 is forcefully inserted a metal collar 26, in the inner wall of which there is cut out a female screw.
  • a pair of engagement projections 28 engageable with said grooves 31.
  • the cover 23 can be easily fixed to the base board 16 by fitting the engagement projections 28 of the cover 23 into the engagement grooves 31 of the base board 16, and connecting the projection 29 of the cover 23 to the fixing projection 25 of the base board 16.
  • the peripheral edge of the side wall 23a is detachably fitted with the peripheral edge of the rim 16a.
  • the base board 16 and silencer tubes 22 are integrally molded from synthetic resin. Therefore, this assembly is of simple structure and sufficiently small weight to prevent the other parts of the engine from being subjected to a heavy load and in consequence causes little damage thereto.
  • the base board 16 may be formed of synthetic resin.
  • the base board 16 or cover 23 may consist of a suitable material, for example, metal or 1.
  • An intake silencer for an internal combustion engine disposed on the side of an intake port of a carburetor comprising a base board fixed to the peripheral portion of said intake port of the carburetor; a cover, the peripheral edge of said cover being detachably fitted with the peripheral edge of said base board; an expansion chamber defined by said base board and cover; and a plurality of silencer tubes fixed to at least one of said base board and cover and having openings at each end thereof, the openings at one end being openin said expansion chamber, the openings at .theother end being open in the external air, said plurality of silencer tubes and said one of said base board and cover being integrally molded from synthetic resin, whereby the external air conducted into said expansion chamber is sucked in said intake port of the carburetor during the operation of the engine.
  • An intake silencer according to claim 2, wherein the engagement means comprises a groove and projection assembly formed on the mutually facing walls of the base board and cover which is disposed on one side of the peripheral edge of said base board and coverand a screw provided on the opposite side of said assembly to join the base board and cover.
  • An intake silencer according to claim 2, further comprising a fitting plate fixed to the peripheral portion of said intake port of the carburetor, said plate being bored with an opening corresponding to said intake port of the carburetor, the base board being also bored with an opening closed by said fitting plate, and the base board being apartly joined with an elastic packing interposed therebetween.
  • An intake silencer comprising a fitting plate disposed on that side of a carburetor body on which there is formed an intakeport, through which an air horn is pressed at one end against the body; screws for joining together the air horn, fitting plate and carburetor body; a base board shaped like a shallow pan, bored with an opening for receiving the air horn and provided with a plurality of silencer tubes molded from synthetic resin integrally with said base board; an elastic packing having a rim member interposed between the peripheral edge of the opening of the base board and the peripheral edge of the fitting plate; screws for joining together the whole peripheral length thereof a peripheral edge of the pan-shaped base board and defining an expansion chamber with the fitting plate and base board; and means for detachably fitting the peripheral edge of the the elastic packing, fitting plate and base board; a pot- 5 cover to that of the base board.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust Silencers (AREA)
US00359303A 1972-05-13 1973-05-11 Intake silencer for an internal combustion engine Expired - Lifetime US3835956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972055724U JPS4912309U (enrdf_load_stackoverflow) 1972-05-13 1972-05-13

Publications (1)

Publication Number Publication Date
US3835956A true US3835956A (en) 1974-09-17

Family

ID=13006795

Family Applications (1)

Application Number Title Priority Date Filing Date
US00359303A Expired - Lifetime US3835956A (en) 1972-05-13 1973-05-11 Intake silencer for an internal combustion engine

Country Status (2)

Country Link
US (1) US3835956A (enrdf_load_stackoverflow)
JP (1) JPS4912309U (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966014A (en) * 1973-11-22 1976-06-29 Bombardier Limited Air intake silencer
FR2393163A1 (fr) * 1977-05-30 1978-12-29 Honda Motor Co Ltd Appareil servant a supprimer les bruits d'aspiration d'un moteur a combustion interne
US4136756A (en) * 1975-04-19 1979-01-30 Kawasaki Jukogyo Kabushiki Kaisha Suction air muffler for a motorcycle
US4497287A (en) * 1981-05-14 1985-02-05 Klockner-Humboldt-Deutz Aktiengesellschaft Intake system with oscillator tubes
US4569415A (en) * 1984-08-09 1986-02-11 Outboard Marine Corporation Air silencer for an internal combustion engine
US4620607A (en) * 1984-08-09 1986-11-04 Outboard Marine Corporation Air silencer for an internal combustion engine
US4930472A (en) * 1988-05-23 1990-06-05 Suzuki Jidosha Kogyo Kabushiki Kaisha Vehicle air cleaner
US5016728A (en) * 1990-03-12 1991-05-21 Arctco, Inc. Air intake noise suppressor
US5146052A (en) * 1989-05-24 1992-09-08 Friedrich Boysen Gmbh & Co. Kg Muffler for internal-combustion engine exhaust gases and method of assembly thereof
AT395465B (de) * 1988-04-18 1993-01-25 Pischinger Rudolf Dipl Ing Dr Ansaugvorrichtung mit vergaser fuer brennkraftmaschinen
US5424494A (en) * 1992-12-10 1995-06-13 Siemens Automotive Limited Noise-attenuating internal combustion engine air intake system
US5516990A (en) * 1994-06-07 1996-05-14 Outboard Marine Corporation Engine incoming air silencer and mounting arrangement therefore
US5947082A (en) * 1997-11-05 1999-09-07 Ford Global Technologies, Inc. Idle air bypass valve silencer
US20060032700A1 (en) * 2004-08-12 2006-02-16 Vizanko James C Noise reduction technique for snowmobiles
EP1645748A1 (de) * 2004-10-09 2006-04-12 DaimlerChrysler AG Ansaugsystem für eine Brennkraftmaschine
US20070000467A1 (en) * 2005-07-01 2007-01-04 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system
USRE40621E1 (en) 1997-10-06 2009-01-13 Ford Global Technologies, Llc Flow improvement vanes in the intake system of an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149836A (en) * 1935-11-04 1939-03-07 Gen Motors Corp Intake silencer
US2954096A (en) * 1957-09-06 1960-09-27 Gen Motors Corp Air cleaner silencer assembly
US3293830A (en) * 1964-07-14 1966-12-27 Ford Motor Co Flame retarding induction system for an internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5110912Y2 (enrdf_load_stackoverflow) * 1971-03-20 1976-03-24

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149836A (en) * 1935-11-04 1939-03-07 Gen Motors Corp Intake silencer
US2954096A (en) * 1957-09-06 1960-09-27 Gen Motors Corp Air cleaner silencer assembly
US3293830A (en) * 1964-07-14 1966-12-27 Ford Motor Co Flame retarding induction system for an internal combustion engine

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966014A (en) * 1973-11-22 1976-06-29 Bombardier Limited Air intake silencer
US4136756A (en) * 1975-04-19 1979-01-30 Kawasaki Jukogyo Kabushiki Kaisha Suction air muffler for a motorcycle
FR2393163A1 (fr) * 1977-05-30 1978-12-29 Honda Motor Co Ltd Appareil servant a supprimer les bruits d'aspiration d'un moteur a combustion interne
US4497287A (en) * 1981-05-14 1985-02-05 Klockner-Humboldt-Deutz Aktiengesellschaft Intake system with oscillator tubes
US4569415A (en) * 1984-08-09 1986-02-11 Outboard Marine Corporation Air silencer for an internal combustion engine
US4620607A (en) * 1984-08-09 1986-11-04 Outboard Marine Corporation Air silencer for an internal combustion engine
AT395465B (de) * 1988-04-18 1993-01-25 Pischinger Rudolf Dipl Ing Dr Ansaugvorrichtung mit vergaser fuer brennkraftmaschinen
US4930472A (en) * 1988-05-23 1990-06-05 Suzuki Jidosha Kogyo Kabushiki Kaisha Vehicle air cleaner
US5146052A (en) * 1989-05-24 1992-09-08 Friedrich Boysen Gmbh & Co. Kg Muffler for internal-combustion engine exhaust gases and method of assembly thereof
US5016728A (en) * 1990-03-12 1991-05-21 Arctco, Inc. Air intake noise suppressor
US5424494A (en) * 1992-12-10 1995-06-13 Siemens Automotive Limited Noise-attenuating internal combustion engine air intake system
US5516990A (en) * 1994-06-07 1996-05-14 Outboard Marine Corporation Engine incoming air silencer and mounting arrangement therefore
USRE40621E1 (en) 1997-10-06 2009-01-13 Ford Global Technologies, Llc Flow improvement vanes in the intake system of an internal combustion engine
US5947082A (en) * 1997-11-05 1999-09-07 Ford Global Technologies, Inc. Idle air bypass valve silencer
US20060032700A1 (en) * 2004-08-12 2006-02-16 Vizanko James C Noise reduction technique for snowmobiles
EP1645748A1 (de) * 2004-10-09 2006-04-12 DaimlerChrysler AG Ansaugsystem für eine Brennkraftmaschine
US20060075988A1 (en) * 2004-10-09 2006-04-13 Thomas Howe Intake system for an internal combustion engine
US20070000467A1 (en) * 2005-07-01 2007-01-04 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system
US7207310B2 (en) 2005-07-01 2007-04-24 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system

Also Published As

Publication number Publication date
JPS4912309U (enrdf_load_stackoverflow) 1974-02-01

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