US3712416A - Air intake silencer - Google Patents

Air intake silencer Download PDF

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Publication number
US3712416A
US3712416A US00202357A US3712416DA US3712416A US 3712416 A US3712416 A US 3712416A US 00202357 A US00202357 A US 00202357A US 3712416D A US3712416D A US 3712416DA US 3712416 A US3712416 A US 3712416A
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US
United States
Prior art keywords
chamber
housing
pressure waves
air
silencer
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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
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US00202357A
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English (en)
Inventor
I Swanson
W Wagner
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Donaldson Co Inc
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Donaldson Co Inc
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    • 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
    • F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
    • 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
    • F02M35/1244—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound
    • 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
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F02M35/1261—Helmholtz resonators
    • 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
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts

Definitions

  • the silencer contains a tuning chamber which 181/33 HA, 33 L, 35 R, 35 A, 40, 48, 59 is sized for a given engine speed in order to reflect m n k md ea .m m
  • the air intake silencer also conta UNITED STATES PATENTS ing chamber which silences the audible sound waves which are emitted from the engine.
  • a third chamber 0. e me n a m fir. em r e S e C I mm w. 8. ma b ml i a w e a V r. mm p3 .m s, g m m C nnC that, e m m 63 ch ac RAAA 5555 3333 88800 2,869,670 2,954,096 McMullen Everett Addie et al.
  • This invention relates generally to noise silencers for internal combustion engines and more specifically concerns air intake silencers for use with snowmobiles which muffle noises escaping from the air intake system and which also improve the engines performance.
  • a silencer should be provided in the air intake path to muffle noises escaping therethrough.
  • the present invention pertains to an air intake silencer for an internal combustion engine.
  • the silencer provides a path for air to be supplied to the engine while it muffles noises escaping from the engine through the air intake system.
  • the silencer contains three chambers which act to destruct the pressure waves generated by the engine which cause audible noise and which tend to reduce engine performance.
  • the first chamber is a tuning chamber which is sized so as to change the phase of those pressure waves which are reflected back toward the engine. This reflected wave destructively interferes with pressure wavesleaving the engine and properly calibrated increases engine performance.
  • the second chamber acts as a noise silencing chamber and it has a perforated tube through the center thereof, which combination has the effect of changing the phase of sound pressure waves providing for their destructive interference with other sound waves.
  • the third chamber is a balancing chamber of the first two chambers which further changes the phase of pressure waves thus further effecting the engine performance.
  • FIG. 1 is a side elevation view of a snowmobile having the air intake silencer mounted thereon;
  • FIG. 2 is a view taken along line 2.2 of FIG. 1 showing the internal portions of the air-intake silencer;
  • FIG. 3 is a view takenalong line 33 of.FlG. 2.
  • DESCRIPTION OF THE PREFERRED EMBODIMENT Drive sprocket 19 is driven by a two-stroke cycle engine 25 which is mounted in an engine compartment within engine-hood 27.
  • a carburetor 29 is provided for the supply of an air-fuel mixture to the engine crankcase.
  • Air intake silencer 31 is shown attached to carburetor 29 by apparatus which will be described later.
  • Silencer 31 can be built from polyethylene or any other suitable material.
  • the silencer 31 is generally encased by front wall 33, back wall 35 and side walls 37. These walls further define a top portion 39 and a bottom portion 41.
  • bell-shaped air inlet port 43 is provided near the bottom portion 41 of air intake silencer 31 to allow air to flow through the air intake silencer 31 and out an air outlet port 45 to the carburetor 29.
  • a rigid backing plate 47 is attachable to the silencer 31.
  • Backing plate 47 has mounting holes (not shown) for mounting to the silencer 31 and additionally has an air outlet opening 51 and carburetor adapting holes 53.
  • Bolts 55 are insertable through holes 56 in walls 33 and 35 and through the holes (not shown) in backing plate 47 and held therein by nuts 57.
  • An adapter is provided to adapt silencer 31 to carburetor 29.
  • Adapter 59 has a front portion 61, a back portion 63, and structural members 65.
  • the distance between front portion 61 and back portion 63 is shorter than the distance between wall 33 and wall 35 in order that when bolts 67 are inserted through holes 69 in front portion 61, through holes 71 in back portion 63, through holes 53 in backing plate 47, and screwed within carburetor 29,
  • baffle plates 81 and 83 additionally have a hole 85 located therein.
  • Tube 91 Extending through hole 87 in baffle plate 75 and rigidly mounted thereto, and through hole 87 in baffle plate 77, and rigidly mounted thereto, is a perforated tube 91.
  • Tube 91 is generally axial (along line 3-3) with respect to air intake silencer 31 and has a portion 93 extending past baffle plate 77 with a gradually increasing diameter.
  • a tuning chamber 95 is shown in the top portion of air silencer 31 and is generally defined by baffle plate 75, walls 33 and 35 and top portion 39.
  • a second chamber 97 acts as a'silencing chamber. and is generally defined by baffle plate 75, baffle plate 77, walls 33 and 35, and side walls 37.
  • a third chamber 99 acts as a balancing chamber and is generally defined by baffle plat. 77, walls 33 and 35, and bottom portion 41. As shown, balancing chamber 99 is open to the air by way of bell-shaped air intake port 43, and tuning chamber 95 is open to carburetor 29 through opening 15.
  • the mechanics of the resonator are well known in the art, in general, the combination has the effect of changing the phase of pressure waves within the chamber in order that they can destructively interfere with other pressure waves to reduce the amplitude of the resultant pressure wave and thus attenuate the audible noise.
  • the present invention deals with the power loss which is associated with silencing.
  • Power output from the two-stroke cycle engine depends principally upon having an air-fuel mixture which is under high crankcase pressure in order to flow to the cylinder and to push the burned gases out of the cylinder exhaust port.
  • high-amplitude higher than approximately 0.001 psi
  • low-frequency waves -300 cps
  • the restriction When providing a restriction in the air intake path in order to silence the high-frequency, low-amplitude audible waves, the restriction may'reflect back toward the engine crankcase a higher amplitude, low-frequency presthe crankcase and thus further reduce the crankcase pressure at air intake port closing. We found that this destructive interference does occur. Thus, in order to wavesback through the air intake system,- and to the crankcase, which are of different phase than pressure waves emanating'therefrorn' in order to cause their destructive interference. A, pressure-time history is desired which provides peak pressure at airintakeclos I ing. Foran engine ata selected typical speed, the optimal volume andshape of the tuning chamber 95 can bedete'rrhined empirically by measuring engine torque output.
  • baffle-plates 81 and 83 The actual wave reflection is accomplished by the volume defin edrby top; portion 39, baffle-plates 81 and 83, walls and J5, and ,baffle plate ,75.
  • the volume outside of baffle plates 81 and 83 offers very little additional tuning but .is provided tomake silencer 31 more structurally sound and asthetically pleasing.
  • silencing chamber 97 tends to destroy the performance of tuning chamber 95 since silencing chamber 97 reflects some high-amplitude, low-frequency waves which are in phase with the waves emitting from the engine.
  • balancing chamber99 is providedfor further increasing the engine performance. Balancing chamber 99 reflects waves back through the air intake system which arrive in chamber 99 at a later time than at'tuning chamber 95 and when reflect ed are further out of phase than waves reflected from 'tuning chamber 95. These waves destructively interfere with waves emitting from the crankcase and with waves reflected by silencing chamber 97 in order to increase crankcase pressure at air intake port closing thus increasing engine performance.
  • an air intake silencer comprising: 7
  • an air outlet port for the transfer of air out of said d means attaching said housing to said carburetor for the transfer of air from said outlet port to said ,carburetor;
  • a tuning chamber defined by said housing for the reflection of pressure waves of different phase from pressure waves emanating from said twostroke cycle engine through said air outlet port;
  • An air intake silencer for internal combustion engines comprising:
  • first means disposed within said housing for changing the phase of sound pressure waves providing for their destructive interference with other sound pressure waves;
  • second means disposed within said housing for the reflection of pressure waves of different phase from pressure waves emanating from said internal combustion engine through said air outlet port;
  • third means disposed within said housing for the reflection of pressure waves of different phase than said pressure waves reflected by said second means, different in phase from any pressure waves reflected by said first means, and different in phase from pressure waves emanating from said internal combustion engine.
  • said second means includes a tuning chamber defined by said housing;
  • said third means includes a balancing chamber defined by said housing;
  • said first means includes a silencing chamber defined by said housing with a perforated tube mounted therein with one end extending into said tuning chamber and the other end having a gradually increasing diameter and vextending into said silencing chamber.
  • An air intake silencer for internal combustion engines comprising:
  • a casing having walls, a top portion, a bottom portion, and an air inlet port for receiving air into said silencer and an air outlet port for the transfer of air out of said silencer;
  • first and second baffle plates mounted within said casing, said baffle plates having their peripheral edges secured to the interior of said walls and being spaced from each other and from the top and bottom portions of said casing, said first baffle plate associating with said top portion and said walls to define a tuning chamber, said outlet port opening said tuning chamber for the transfer of air out of said silencer, said first baffle plate and said second baffle plate associating with said walls to define a silencing chamber, said second baffle plate associating with said bottom portion and with said walls to define a balancing chamber, said inlet port connecting said balancing chamber to a source of air, each of said baffle plates having an opening therein; and
  • a tube having a top end and a bottom end, said tube being mounted in said opening in said top baffle plate and in said opening in said bottom baffle plate, said top end thereof extending into said tuning chamber, and said bottom end thereof extending into said balancing chamber, said tube having a gradually increasing diameter at the bottom end thereof extending into said balancing chamber, said tube having perforations in the walls thereof communicating with said silencing chamber.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
US00202357A 1971-11-26 1971-11-26 Air intake silencer Expired - Lifetime US3712416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20235771A 1971-11-26 1971-11-26

Publications (1)

Publication Number Publication Date
US3712416A true US3712416A (en) 1973-01-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00202357A Expired - Lifetime US3712416A (en) 1971-11-26 1971-11-26 Air intake silencer

Country Status (7)

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US (1) US3712416A (de)
JP (1) JPS4859209A (de)
AT (1) AT333549B (de)
AU (1) AU4824572A (de)
CA (1) CA964537A (de)
DE (1) DE2247361A1 (de)
IT (1) IT973715B (de)

Cited By (45)

* 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
US4168948A (en) * 1976-04-08 1979-09-25 Kabushiki Kaisha Tomoe Shokai Burner assembly
US4254746A (en) * 1977-05-30 1981-03-10 Honda Giken Kogyo Kabushiki Kaisha Means silencing suction noise in internal combustion engines
US4722709A (en) * 1985-11-19 1988-02-02 Outboard Marine Corporation Marine propulsion device cowl assembly
FR2605271A1 (fr) * 1986-10-17 1988-04-22 Gilardini Spa Groupe d'aspiration de l'air pour vehicules industriels
US4978321A (en) * 1984-03-26 1990-12-18 Ferguson Arthur R Baffled air intake system for outboard motors
US5052353A (en) * 1990-05-18 1991-10-01 Outboard Marine Corporation Marine propulsion device cowl assembly
US5080618A (en) * 1990-05-18 1992-01-14 Outboard Marine Corporation Marine propulsion device cowl assembly
FR2722278A1 (fr) * 1994-07-05 1996-01-12 Necchi Compressori Silencieux pour motocompresseurs d'appareils de refrigeration
US5804777A (en) * 1995-11-02 1998-09-08 Lg Electronics Inc. Suction noise muffler for hermetic compressor
WO1998059166A1 (de) * 1997-06-20 1998-12-30 Filterwerk Mann+Hummel Gmbh Ansaugsystem, insbesondere zur verwendung als ansaugkanal einer verbrennungskraftmaschine
US6155224A (en) * 1998-08-18 2000-12-05 Denso Corporation Noise silencer for vehicle engine intake system
US6196187B1 (en) 1999-07-06 2001-03-06 Ford Global Technologies, Inc. Idle air bypass valve silencer
US6520284B2 (en) * 1999-01-27 2003-02-18 Filterwerk Mann & Hummel Gmbh Air intake device comprising a duct section provided with openings
US20050129534A1 (en) * 2003-12-15 2005-06-16 Samsung Gwang Ju Electronics Co., Ltd. Hermetic compressor
US20060032700A1 (en) * 2004-08-12 2006-02-16 Vizanko James C Noise reduction technique for snowmobiles
US20070000467A1 (en) * 2005-07-01 2007-01-04 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system
US20090065294A1 (en) * 2007-09-07 2009-03-12 Black Rock Systems Llc. Engine silencing and vibration reduction system and method
US20090104050A1 (en) * 2004-11-22 2009-04-23 Akira Inoue Compressor
US20100089355A1 (en) * 2008-10-10 2010-04-15 Polaris Industries Inc. Air intake system for controlling sound emission
CN102269088A (zh) * 2010-06-04 2011-12-07 通用汽车环球科技运作有限责任公司 用于涡轮应用的具有气流旋转和噪音吸收器的进气系统
US20130092472A1 (en) * 2011-10-12 2013-04-18 Ford Global Technologies, Llc Acoustic attenuator for an engine booster
US8613335B2 (en) 2010-08-03 2013-12-24 Polaris Industries Inc. Side-by-side vehicle
US8746719B2 (en) 2010-08-03 2014-06-10 Polaris Industries Inc. Side-by-side vehicle
US20150197149A1 (en) * 2014-01-10 2015-07-16 Polaris Industries Inc. Snowmobile
WO2015105974A3 (en) * 2014-01-10 2015-09-24 Polaris Industries Inc. Snowmobile
US9434244B2 (en) 2006-07-28 2016-09-06 Polaris Industries Inc. Side-by-side ATV
US9506407B2 (en) 2014-01-10 2016-11-29 Polaris Industries Inc. Engine having active exhaust valve position control system and method
US9540072B2 (en) 2012-02-09 2017-01-10 Polaris Industries Inc. Snowmobile
US9649928B2 (en) 2015-06-25 2017-05-16 Polaris Industries Inc. All-terrain vehicle
USD787985S1 (en) 2015-06-24 2017-05-30 Polaris Industries Inc. All-terrain vehicle
US9809195B2 (en) 2008-10-10 2017-11-07 Polaris Industries Inc. Snowmobile
US10358187B2 (en) 2014-01-10 2019-07-23 Polaris Industries Inc. Snowmobile
US10457140B2 (en) 2007-05-16 2019-10-29 Polaris Industries Inc. All terrain vehicle
US10766533B2 (en) 2015-12-10 2020-09-08 Polaris Industries Inc. Utility vehicle
US10793181B2 (en) 2018-02-13 2020-10-06 Polaris Industries Inc. All-terrain vehicle
US10946736B2 (en) 2018-06-05 2021-03-16 Polaris Industries Inc. All-terrain vehicle
US11142286B2 (en) 2006-08-09 2021-10-12 Polaris Industries Inc. Snowmobile
US11255303B2 (en) 2019-01-21 2022-02-22 Toledo Molding & Die, Llc Inline high frequency fiber silencer
US11752860B2 (en) 2015-05-15 2023-09-12 Polaris Industries Inc. Utility vehicle
US12337690B2 (en) 2020-05-15 2025-06-24 Polaris Industries Inc. Off-road vehicle
US12385429B2 (en) 2022-06-13 2025-08-12 Polaris Industries Inc. Powertrain for a utility vehicle
USD1103845S1 (en) 2023-01-20 2025-12-02 Polaris Industries Inc. Grille for an off-road vehicle
US12552246B2 (en) 2023-06-21 2026-02-17 Polaris Industries Inc. Utility vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5439685Y2 (de) * 1974-07-24 1979-11-24

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB610841A (en) * 1946-01-21 1948-10-21 Likuvag A G Improvements in or relating to sound damping and silencing devices for gaseous currents
FR1052144A (fr) * 1952-03-06 1954-01-21 Dispositif pour l'amortissement des sons produits par l'admission d'air dans un moteur
CA522116A (en) * 1956-02-28 M. Walton George Silencer
GB780235A (en) * 1955-02-21 1957-07-31 Gen Motors Ltd Improvements in silencers for the air intakes of carburetters for internal combustion engines
US2869670A (en) * 1956-10-01 1959-01-20 Gen Motors Corp Intake silencer
FR1207490A (fr) * 1958-06-23 1960-02-17 Silencieux d'admission d'air pour machines à aspiration pulsatoire
US2954096A (en) * 1957-09-06 1960-09-27 Gen Motors Corp Air cleaner silencer assembly
US2990907A (en) * 1959-06-11 1961-07-04 Wilhelm S Everett Acoustic filter
US3077731A (en) * 1958-11-24 1963-02-19 Gen Motors Corp Compressor mechanism for internal combustion engines and the like

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA522116A (en) * 1956-02-28 M. Walton George Silencer
GB610841A (en) * 1946-01-21 1948-10-21 Likuvag A G Improvements in or relating to sound damping and silencing devices for gaseous currents
FR1052144A (fr) * 1952-03-06 1954-01-21 Dispositif pour l'amortissement des sons produits par l'admission d'air dans un moteur
GB780235A (en) * 1955-02-21 1957-07-31 Gen Motors Ltd Improvements in silencers for the air intakes of carburetters for internal combustion engines
US2869670A (en) * 1956-10-01 1959-01-20 Gen Motors Corp Intake silencer
US2954096A (en) * 1957-09-06 1960-09-27 Gen Motors Corp Air cleaner silencer assembly
FR1207490A (fr) * 1958-06-23 1960-02-17 Silencieux d'admission d'air pour machines à aspiration pulsatoire
US3077731A (en) * 1958-11-24 1963-02-19 Gen Motors Corp Compressor mechanism for internal combustion engines and the like
US2990907A (en) * 1959-06-11 1961-07-04 Wilhelm S Everett Acoustic filter

Cited By (79)

* 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
US4168948A (en) * 1976-04-08 1979-09-25 Kabushiki Kaisha Tomoe Shokai Burner assembly
US4254746A (en) * 1977-05-30 1981-03-10 Honda Giken Kogyo Kabushiki Kaisha Means silencing suction noise in internal combustion engines
US4978321A (en) * 1984-03-26 1990-12-18 Ferguson Arthur R Baffled air intake system for outboard motors
US4722709A (en) * 1985-11-19 1988-02-02 Outboard Marine Corporation Marine propulsion device cowl assembly
FR2605271A1 (fr) * 1986-10-17 1988-04-22 Gilardini Spa Groupe d'aspiration de l'air pour vehicules industriels
US5080618A (en) * 1990-05-18 1992-01-14 Outboard Marine Corporation Marine propulsion device cowl assembly
US5052353A (en) * 1990-05-18 1991-10-01 Outboard Marine Corporation Marine propulsion device cowl assembly
FR2722278A1 (fr) * 1994-07-05 1996-01-12 Necchi Compressori Silencieux pour motocompresseurs d'appareils de refrigeration
US5804777A (en) * 1995-11-02 1998-09-08 Lg Electronics Inc. Suction noise muffler for hermetic compressor
WO1998059166A1 (de) * 1997-06-20 1998-12-30 Filterwerk Mann+Hummel Gmbh Ansaugsystem, insbesondere zur verwendung als ansaugkanal einer verbrennungskraftmaschine
US6155224A (en) * 1998-08-18 2000-12-05 Denso Corporation Noise silencer for vehicle engine intake system
US6520284B2 (en) * 1999-01-27 2003-02-18 Filterwerk Mann & Hummel Gmbh Air intake device comprising a duct section provided with openings
US6196187B1 (en) 1999-07-06 2001-03-06 Ford Global Technologies, Inc. Idle air bypass valve silencer
US20050129534A1 (en) * 2003-12-15 2005-06-16 Samsung Gwang Ju Electronics Co., Ltd. Hermetic compressor
US20060032700A1 (en) * 2004-08-12 2006-02-16 Vizanko James C Noise reduction technique for snowmobiles
US20090104050A1 (en) * 2004-11-22 2009-04-23 Akira Inoue Compressor
US7686592B2 (en) * 2004-11-22 2010-03-30 Panasonic Corporation Compressor
US7207310B2 (en) 2005-07-01 2007-04-24 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system
US20070000467A1 (en) * 2005-07-01 2007-01-04 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system
US12012000B2 (en) 2006-07-28 2024-06-18 Polaris Industries Inc. Side-by-side ATV
US9434244B2 (en) 2006-07-28 2016-09-06 Polaris Industries Inc. Side-by-side ATV
US11142286B2 (en) 2006-08-09 2021-10-12 Polaris Industries Inc. Snowmobile
US10493846B2 (en) 2007-05-16 2019-12-03 Polaris Industries Inc. All terrain vehicle
US10457140B2 (en) 2007-05-16 2019-10-29 Polaris Industries Inc. All terrain vehicle
US7934582B2 (en) * 2007-09-07 2011-05-03 Go Green APU LLC Engine silencing and vibration reduction system and method
US20090065294A1 (en) * 2007-09-07 2009-03-12 Black Rock Systems Llc. Engine silencing and vibration reduction system and method
US8127877B2 (en) 2008-10-10 2012-03-06 Polaris Industries Inc. Air intake system for controlling sound emission
US11772601B2 (en) 2008-10-10 2023-10-03 Polaris Industries Inc. Vehicle security system
US20100089355A1 (en) * 2008-10-10 2010-04-15 Polaris Industries Inc. Air intake system for controlling sound emission
US9809195B2 (en) 2008-10-10 2017-11-07 Polaris Industries Inc. Snowmobile
CN102269088A (zh) * 2010-06-04 2011-12-07 通用汽车环球科技运作有限责任公司 用于涡轮应用的具有气流旋转和噪音吸收器的进气系统
US20110299981A1 (en) * 2010-06-04 2011-12-08 Gm Global Technology Operations, Inc. Induction System with Air Flow Rotation and Noise Absorber for Turbocharger Applications
US8651800B2 (en) * 2010-06-04 2014-02-18 Gm Global Technology Operations Llp Induction system with air flow rotation and noise absorber for turbocharger applications
US9217501B2 (en) 2010-08-03 2015-12-22 Polaris Industries Inc. Side-by-side vehicle
US8827019B2 (en) 2010-08-03 2014-09-09 Polaris Industries Inc. Side-by-side vehicle
US9211924B2 (en) 2010-08-03 2015-12-15 Polaris Industries Inc. Side-by-side vehicle
US8746719B2 (en) 2010-08-03 2014-06-10 Polaris Industries Inc. Side-by-side vehicle
US9365251B2 (en) 2010-08-03 2016-06-14 Polaris Industries Inc. Side-by-side vehicle
US8827020B2 (en) 2010-08-03 2014-09-09 Polaris Industries Inc. Side-by-side vehicle
US12194845B2 (en) 2010-08-03 2025-01-14 Polaris Industries Inc. Side-by-side vehicle
US10369886B2 (en) 2010-08-03 2019-08-06 Polaris Industries Inc. Side-by-side vehicle
US20170106747A1 (en) * 2010-08-03 2017-04-20 Polaris Industries Inc. Side-by-side vehicle
US8613336B2 (en) 2010-08-03 2013-12-24 Polaris Industries Inc. Side-by-side vehicle
US11840142B2 (en) 2010-08-03 2023-12-12 Polaris Industries Inc. Side-by-side vehicle
US10981448B2 (en) 2010-08-03 2021-04-20 Polaris Industries Inc. Side-by-side vehicle
US8613335B2 (en) 2010-08-03 2013-12-24 Polaris Industries Inc. Side-by-side vehicle
US11390161B2 (en) 2010-08-03 2022-07-19 Polaris Industries Inc. Side-by-side vehicle
US9969259B2 (en) * 2010-08-03 2018-05-15 Polaris Industries Inc. Side-by-side vehicle
US9951728B2 (en) 2011-10-12 2018-04-24 Ford Global Technologies, Llc Acoustic attenuator for an engine booster
US20130092472A1 (en) * 2011-10-12 2013-04-18 Ford Global Technologies, Llc Acoustic attenuator for an engine booster
US9097220B2 (en) * 2011-10-12 2015-08-04 Ford Global Technologies, Llc Acoustic attenuator for an engine booster
US11505263B2 (en) 2012-02-09 2022-11-22 Polaris Industries Inc. Snowmobile
US9540072B2 (en) 2012-02-09 2017-01-10 Polaris Industries Inc. Snowmobile
US12286175B2 (en) 2012-02-09 2025-04-29 Polaris Industries Inc. Snowmobile
US11753114B2 (en) 2014-01-10 2023-09-12 Polaris Industries Inc. Snowmobile
WO2015105974A3 (en) * 2014-01-10 2015-09-24 Polaris Industries Inc. Snowmobile
US12296920B2 (en) 2014-01-10 2025-05-13 Polaris Industries Inc. Snowmobile
US20150197149A1 (en) * 2014-01-10 2015-07-16 Polaris Industries Inc. Snowmobile
US9506407B2 (en) 2014-01-10 2016-11-29 Polaris Industries Inc. Engine having active exhaust valve position control system and method
US10358187B2 (en) 2014-01-10 2019-07-23 Polaris Industries Inc. Snowmobile
US9845004B2 (en) * 2014-01-10 2017-12-19 Polaris Industries Inc. Snowmobile
US11286019B2 (en) 2014-01-10 2022-03-29 Polaris Industries Inc. Snowmobile
US11752860B2 (en) 2015-05-15 2023-09-12 Polaris Industries Inc. Utility vehicle
USD832149S1 (en) 2015-06-24 2018-10-30 Polaris Industries Inc. All-terrain vehicle
USD787985S1 (en) 2015-06-24 2017-05-30 Polaris Industries Inc. All-terrain vehicle
US9944177B2 (en) 2015-06-25 2018-04-17 Polaris Industries Inc. All-terrain vehicle
US9649928B2 (en) 2015-06-25 2017-05-16 Polaris Industries Inc. All-terrain vehicle
US10766533B2 (en) 2015-12-10 2020-09-08 Polaris Industries Inc. Utility vehicle
US10926799B2 (en) 2015-12-10 2021-02-23 Polaris Industries Inc. Utility vehicle
US12409882B2 (en) 2018-02-13 2025-09-09 Polaris Industries Inc. All-terrain vehicle
US10793181B2 (en) 2018-02-13 2020-10-06 Polaris Industries Inc. All-terrain vehicle
US10946736B2 (en) 2018-06-05 2021-03-16 Polaris Industries Inc. All-terrain vehicle
US11255303B2 (en) 2019-01-21 2022-02-22 Toledo Molding & Die, Llc Inline high frequency fiber silencer
US12337690B2 (en) 2020-05-15 2025-06-24 Polaris Industries Inc. Off-road vehicle
US12385429B2 (en) 2022-06-13 2025-08-12 Polaris Industries Inc. Powertrain for a utility vehicle
USD1103845S1 (en) 2023-01-20 2025-12-02 Polaris Industries Inc. Grille for an off-road vehicle
US12552246B2 (en) 2023-06-21 2026-02-17 Polaris Industries Inc. Utility vehicle

Also Published As

Publication number Publication date
CA964537A (en) 1975-03-18
ATA888972A (de) 1976-03-15
IT973715B (it) 1974-06-10
AT333549B (de) 1976-11-25
DE2247361A1 (de) 1973-05-30
AU4824572A (en) 1974-05-02
JPS4859209A (de) 1973-08-20

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