And Side Branch Chamber Patents (Class 181/266)
  • Patent number: 11248511
    Abstract: A sinuous balanced mid-pipe exhaust system has a straight mid-pipe and a sinuous mid-pipe disposed intermediate manifold and muffler. The manifold has a differential bilateral manifold pipe length. The longer manifold pipe connected to the straight mid-pipe and the shorter manifold pipe connected to the sinuous mid-pipe. Sinuous mid-pipe has 2-3 sinusoidal curved segments such that a sinuous gas flow path therethrough substantially equals the straight pipe flow path length and the manifold differential pipe length. The method balances and equalizes gas flows by defining straight gas flow path, having a path length and defining a sinuous gas flow path with at least two sinusoidal segments which is equal to the path length and the differential path length.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: February 15, 2022
    Assignee: Active Automotive Group Inc.
    Inventors: David Hugh, Karl Hugh
  • Patent number: 11242782
    Abstract: A muffler comprises a plurality of tubes disposed within an inner chamber. The holes are at least partially punched through the tubes so that hanging chads extend into the tubes at each hole. The tubes form a serpentine flow-path through the chamber through which exhaust flows. One or more diffusion brackets are also disposed within the chamber and downstream from one or more tube outlets.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: February 8, 2022
    Assignee: R&R Holding & Leasing
    Inventor: Rafael Vargas
  • Patent number: 11174767
    Abstract: An air exhausting device includes an inlet pipe that couples an exhaust pipe of an engine to a muffler, an outlet pipe that is a path to discharge an exhaust gas inside the muffler to outside air, and the muffler divided into a plurality of chambers by separators. The muffler is configured of a first expansion chamber, a second expansion chamber with which the outlet pipe is communicated, and a third expansion chamber. The inlet pipe is communicated with the first expansion chamber. The outlet pipe is communicated with the second expansion chamber. The first expansion chamber is adjacent to and communicated with the second expansion chamber via a first pipe. The second expansion chamber is communicated with the third expansion chamber via a second pipe. The first expansion chamber is communicated with the third expansion chamber via a third pipe.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: November 16, 2021
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Kenta Suzuki
  • Patent number: 11002165
    Abstract: A muffler has a housing enclosing a plurality of chambers. A first flow path extends from an inlet to an outlet passing through a bypass chamber. A flow tube has a plurality of perforations being open to a chamber other than the bypass chamber. A second in flow path passes from the inlet to the outlet without passing through the bypass chamber and passing through the perforations. Exhaust gas is introduced into the muffler via the inlet and discharged therefrom via the outlet. A first portion of the exhaust gas flows from the inlet to the outlet along the first flow path. A second portion of the exhaust gas flows from the inlet to the outlet along the second flow path, the first and second portions mixing at least in the outlet chamber. A semi-closed tube has an open end being open to one of the chambers and a closed end.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: May 11, 2021
    Assignee: BOMBARDIER RECREATIONAL PRODUCTS INC.
    Inventor: Etienne Poulin
  • Patent number: 10907525
    Abstract: A vehicle exhaust device includes a muffler body that has an interior space divided into a plurality of expansion chambers by a partition wall, and an exhaust control valve that switches an exhaust passage in the muffler body. The exhaust passage includes a first exhaust passage and a second exhaust passage. The first exhaust passage connects an upstream end and a downstream end of the muffler body straight. The second exhaust passage passes through the plurality of expansion chambers via a connecting pipe that connects the plurality of expansion chambers. A center of the first exhaust passage is located above a center of the muffler body in a vehicle upper-lower direction, and the second exhaust passage is located below the first exhaust passage.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: February 2, 2021
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Takayoshi Muramatsu
  • Patent number: 10513956
    Abstract: A muffler assembly (10) that includes a first exhaust gas outlet portion (51), and a second exhaust gas outlet portion (52), with a valve (12) being operable to determine the volume of gas leaving through each outlet portions (51, 52) to govern the resistance of exhaust gas flowing through the muffler assembly (10).
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: December 24, 2019
    Inventor: Tarkan Fahri
  • Patent number: 9909472
    Abstract: The present disclosure relates to an engine system comprising an ICE; an exhaust system; and an engine control unit for controlling operation of the engine system between at least a first operating state resulting in a first exhaust temperature range, and a second operating state resulting in a second, higher, exhaust temperature range. The exhaust system comprises a low frequency sound attenuation portion including a first tubing section having a first flow area; a second tubing section, having a second flow area smaller than the first flow area; and a third tubing section having a third flow area greater than the second flow area. The low frequency sound attenuation portion is dimensioned to achieve laminar flow through the third tubing section when the engine system is in the first operating state; and turbulent flow through the third tubing section when the engine system is in the second operating state.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: March 6, 2018
    Assignee: Volvo Car Corporation
    Inventors: Elise Nielsen, Pekka Saviharju
  • Patent number: 9815521
    Abstract: An exhaust system of a saddle-ride type vehicle includes an exhaust pipe portion, a chamber portion, and a silencer. The exhaust pipe portion is coupled to an engine supported by a frame. The exhaust pipe portion is configured to guide exhaust air. The chamber portion is coupled to the exhaust pipe portion. A cross section of the chamber portion is formed larger than the exhaust pipe portion. The silencer is coupled to the chamber portion. The chamber portion includes: a main body portion disposed below the frame, and a fixing bracket projecting upward from the main body portion. The fixing bracket is secured to the frame. The frame and the fixing bracket have a fixed position. The fixed position is positioned above a lower end of the frame.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: November 14, 2017
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Yoshisato Inayama
  • Patent number: 9809195
    Abstract: A vehicle is shown such as a snowmobile, where a frame includes a tunnel and a front frame portion comprised of cast halves. A suspension system is comprised of upper and lower control arms connected to the front frame portion. Some of the frame components are adhesively fixed together. A powertrain is supported by the frame, and is comprised of an engine and a clutch. The clutch includes a clutch guard supporting an oil container. The engine has an exhaust system which extends through the front frame portion. The snowmobile also has a rear snow deflector.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: November 7, 2017
    Assignee: Polaris Industries Inc.
    Inventors: Timothy J. Giese, Darren J. Hedlund, Richard D. Kerner, Eric J. Borud, Cameron D. Fisher
  • Patent number: 8855329
    Abstract: An active noise control (ANC) system may be implemented to both sides of a fan, such that both directions of the noise emitting are treated to reduce the overall noise. The impact on airflow is minimal, and the technique is very effective in a broad range of low frequencies. Passive sound-absorbing materials may be included for attenuation of high frequencies. The resulting quiet fan produces a low level of noise compared to any other device based on fan, which produces the same capacity of airflow. The quiet fan may be incorporated in any mechanical system which requires airflow induction such as: computers, air conditioners, machines, and more.
    Type: Grant
    Filed: January 20, 2008
    Date of Patent: October 7, 2014
    Assignee: Silentium Ltd.
    Inventors: Alon Slapak, Tzvika Fridman, Ofira Rubin
  • Patent number: 8820475
    Abstract: An exhaust muffler for an internal combustion engine including a housing having a sidewall, a first end plate and a second end plate spaced apart and located opposite the first end plate. A plurality of partitions may be disposed within the housing defining a plurality of chambers, including a resonator chamber, a cross-flow chamber, and an outlet chamber. An inlet pipe may be disposed through the housing into the resonator chamber and in fluid communication with the cross-flow chamber, the inlet pipe having a bend in the resonator chamber, wherein the inlet pipe is in fluid communication with the resonator chamber through a resonator aperture located in the bend. A resonator tube may be in fluid communication with the cross-flow chamber and the outlet chamber. An outlet pipe may be disposed through the housing and in fluid communication with the outlet chamber.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: September 2, 2014
    Assignee: Caterpillar Inc.
    Inventor: Rajdeep Pradhan
  • Patent number: 8800713
    Abstract: A muffler for a vehicle exhaust system includes a plastic outer shell that defines an internal cavity. A metal pipe extends through the internal cavity from an inlet to an outlet. A Helmholtz chamber is formed within the plastic outer shell to attenuate a desired frequency.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: August 12, 2014
    Assignee: Faurecia Emissions Control Technologies, USA, LLC
    Inventors: Thorsten Keesser, Robin Willats, Dennis Boennen, Joseph E. Callahan
  • Publication number: 20140151148
    Abstract: An exhaust muffler for an internal combustion engine including a housing having a sidewall, a first end plate and a second end plate spaced apart and located opposite the first end plate. A plurality of partitions may be disposed within the housing defining a plurality of chambers, including a resonator chamber, a cross-flow chamber, and an outlet chamber. An inlet pipe may be disposed through the housing into the resonator chamber and in fluid communication with the cross-flow chamber, the inlet pipe having a bend in the resonator chamber, wherein the inlet pipe is in fluid communication with the resonator chamber through a resonator aperture located in the bend. A resonator tube may be in fluid communication with the cross-flow chamber and the outlet chamber. An outlet pipe may be disposed through the housing and in fluid communication with the outlet chamber.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: Caterpillar Inc.
    Inventor: Rajdeep Pradhan
  • Patent number: 8359836
    Abstract: An internal combustion engine capable of efficiently supplying air to an exhaust path even in a high load state. The internal combustion engine includes a convergent section, a divergent section, and a branch section. The branch section branches a shock wave, propagating in a downstream direction at a higher velocity than exhaust gas flowing into an exhaust path from a combustion chamber when an exhaust valve is opened, from a portion of the exhaust path which is upstream with respect to the divergent section, and propagates the shock wave back to the exhaust path. The exhaust gas is caused to pass the convergent section and to collide against the shock wave between the branch section and the divergent section so as to increase the pressure of the exhaust gas in the convergent section. Such exhaust gas is caused to pass the divergent section to generate a new shock wave.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: January 29, 2013
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yusuke Takahashi, Tsugunori Konakawa
  • Patent number: 8316639
    Abstract: An internal combustion engine capable of improving cleaning efficiency by preventing an increase in the temperature of the exhaust gas to lessen the deterioration of the catalyst. The internal combustion engine includes a convergent section, a divergent section, and a branch section. The branch section branches a shock wave, propagating in a downstream direction at a higher velocity than exhaust gas flowing into an exhaust path from a combustion chamber when an exhaust valve is opened, from a portion of the exhaust path which is upstream with respect to the divergent section, and propagates the shock wave back to the exhaust path. The exhaust gas is caused to pass the convergent section and to collide against the shock wave between the branch section and the divergent section, so as to increase the pressure of the exhaust gas in the convergent section. Such exhaust gas is caused to pass the divergent section to generate a new shock wave and to decrease the temperature of the exhaust gas.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: November 27, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yusuke Takahashi, Tsugunori Konakawa
  • Patent number: 8312713
    Abstract: An internal combustion engine includes a structure that increases the velocity of exhaust gas. The internal combustion engine includes a branch section arranged to branch a shock wave propagating at a higher velocity than exhaust gas and to guide the branched shock wave, and a reflecting section provided in the branch section. The reflecting section is arranged to reflect and return the shock wave back to an exhaust path and cause the shock wave to collide against the exhaust gas, thereby increasing the pressure of the exhaust gas. In accompaniment with the exhaust gas passing a divergent section of a convergent-divergent nozzle, a new shock wave propagating in a downstream direction in the exhaust path is generated, and the temperature and pressure of the exhaust gas are decreased.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: November 20, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yusuke Takahashi, Tsugunori Konakawa
  • Patent number: 8215450
    Abstract: An exhaust muffler device for an internal combustion engine includes an outer housing which defines a sealed chamber and which is connected to opposite inlet and outlet pipes, and an initial expansion subchamber and a pre-outlet subchamber disposed in the sealed chamber. The exhaust gas enters the initial expansion subchamber and mainly flows to a tubular passage in the pre-outlet subchamber to be exhausted through the outlet pipe. Portion of the exhaust gas flows into the sealed chamber and re-enters into a rejoining region of the tubular passage to be entrained in the main stream, thereby attenuating noise of the engine with minimal reduction of engine performance.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: July 10, 2012
    Inventor: Chih-Chien Chien
  • Patent number: 7946382
    Abstract: A method and system for reducing pulsation in lateral piping associated with a gas compressor system. A tunable side branch absorber (TSBA) is installed on the lateral piping. A pulsation sensor is placed in the lateral piping, to measure pulsation within the piping. The sensor output signals are delivered to a controller, which controls actuators that change the acoustic dimensions of the SBA.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: May 24, 2011
    Assignee: Southwest Research Institute
    Inventors: Ralph E. Harris, Christine M. Scrivner, Eugene L. Broerman, III
  • Patent number: 7942239
    Abstract: A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. Further, the inlet being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The muffler further including an outer tank surrounding the passage and a tubular connector having a first end in fluid connection with the passage and a second end in fluid connection with the tank such that the connector produces a fluid connection between the passage and the tank. The connectors having a perforated resistance plate to restrict the fluid flow between said passage and said sound chamber thereby reducing the severity of the sound or fluid pulses entering and exiting said sound chamber, perforations in said perforated plate forming an open portion of said plate and said open portion being less than 60 percent.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: May 17, 2011
    Assignee: TMG Performance Products, LLC
    Inventors: Ronald G. Huff, Keith Skowronski, Mark Bockwich
  • Patent number: 7870930
    Abstract: An exhaust system comprises a muffler and a Helmholtz resonator. The muffler comprises an exhaust inlet aperture for receiving exhaust gas into the muffler, an exhaust outlet aperture for discharging exhaust gas from the muffler, and a resonator aperture. The Helmholtz resonator is at least partially external to the muffler and in acoustic communication with the resonator aperture. An associated method is disclosed.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: January 18, 2011
    Inventor: Joseph Trent Bogard
  • Publication number: 20100270103
    Abstract: A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. Further, the inlet being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The muffler further including an outer tank surrounding the passage and a tubular connector having a first end in fluid connection with the passage and a second end in fluid connection with the tank such that the connector produces a fluid connection between the passage and the tank. The connectors having a perforated resistance plate to restrict the fluid flow between said passage and said sound chamber thereby reducing the severity of the sound or fluid pulses entering and exiting said sound chamber, perforations in said perforated plate forming an open portion of said plate and said open portion being less than 60 percent.
    Type: Application
    Filed: March 1, 2010
    Publication date: October 28, 2010
    Inventors: Ronald G. Huff, Keith Skowronski, Mark Bockwich
  • Patent number: 7798286
    Abstract: A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine. The muffler including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. The inlet of the muffler being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The passage having a first side region and a second side region circumferentially spaced from the first region with a fluid passage in at least one of the first and second side regions. The muffler further including a side attenuation sound chamber adjacent the at least one of the side regions wherein the chamber is circumferentially spaced from the other of the at least one side region.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: September 21, 2010
    Assignee: TMG Performance Products, LLC
    Inventors: Keith Skowronski, Mark Bockwich, Ronald G. Huff
  • Patent number: 7770694
    Abstract: Resonator arrangement in an acoustic muffler for a refrigeration compressor having a shell (1), inside which is mounted an acoustic muffler comprising a hollow body (10) defining at least one dampening chamber (13), which carries a gas inlet duct (20) and a gas outlet duct (30), each presenting a respective length and having a respective wall thickness, at least one of the gas inlet and gas outlet ducts (20, 30) carrying, extending along at least part of its length, a respective plurality of tube type resonant ducts (40), each resonant duct (40) presenting a first end (41), open to the interior of the respective gas duct (20, 30) and a second end (42), opposed to and spaced from the first end (41), each said resonant duct (40) being dimensioned to present a determined length and a determined diameter, which are calculated to define a certain reactive impedance and a certain dissipative impedance for the acoustic muffler, in a determined frequency band.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: August 10, 2010
    Assignee: Whirlpool S.A.
    Inventors: Edmar Baars, Edson Correa Miguel
  • Patent number: 7735604
    Abstract: Silencer of exhaust gases, in particular for motor vehicles, comprising an inlet opening (13) and a cylindrical coat (1) provided with an outlet pipe (29) at its opposing end, said cylindrical coat (1) has an internal division into at least four working sections (5, 6, 7, 8) containing axially arranged elements, especially suppression elements, expansion chambers, a whirl chamber, resonators and twirling, deflecting, and accumulating elements, confined with at least three crosswise arranged partitions (2, 3, 4), while the cylindrical coat (1) opposite to the outlet tube (29) is provided with an inlet section (10) freely encompassing its first working section (5) provided with inlet holes (18) of exhaust gases, said inlet section (10) being attached to the surface of the cylindrical coat (1).
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: June 15, 2010
    Inventors: Eduard Mikes, Zdenek Ekart
  • Patent number: 7690479
    Abstract: A silencer includes a smaller cylindrical member having a planar portion and a larger cylindrical member arranged to closely contact at least a portion of the outer circumferential surface of the smaller cylindrical member. The larger cylindrical member as seen in a direction orthogonal to its axis provides an oblate cross section having a major axis X and a minor axis Y and the smaller cylindrical member is arranged to have the planar portion traversing the major axis X of the larger cylindrical member.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: April 6, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirotoshi Tanaka, Masayuki Yokoi, Fumihiko Mizuno, Hisashi Nishino, Tomoki Mabuchi
  • Patent number: 7584821
    Abstract: An adjustable Helmholtz resonator assembly is provided having an active state and an inactive state. In the active state the Helmholtz resonator assembly is operable to attenuate pressure pulsations within air passing therethrough. In the inactive state the Helmholtz resonator assembly does not attenuate pressure pulsations within air passing therethrough. The Helmholtz resonator assembly is preferably configured to be mounted within an intake system of an internal combustion engine.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: September 8, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Gregory P. Prior, Roxanne M. Bittner
  • Patent number: 7575096
    Abstract: A muffler assembly includes first and second muffler components that are each formed as a single piece. The first muffler component includes a first outlet pipe portion, a first bypass pipe mount portion, and a first resonator shell portion. The second muffler component includes a second output pipe portion, a second bypass pipe mount portion, and a second resonator shell portion. The first and second muffler components are positioned in an overlapping relationship such that respective portions are aligned with each other to form an outlet pipe, a bypass pipe mount, and a resonator shell. A noise attenuation valve assembly is also installed within the first and second muffler components. The bypass pipe mount is positioned at a non-perpendicular orientation relative to the outlet pipe such that a bypass pipe having a straight end mount can be received within the bypass pipe mount to bypass the noise attenuation valve assembly.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: August 18, 2009
    Assignee: EMCON Technologies LLC
    Inventors: Ivan Arbuckle, Robin Willats, Joseph E. Callahan, Anthony Morales
  • Patent number: 7527125
    Abstract: The present invention relates to a muffler for an exhaust system of an internal combustion engine, including a housing having at least one absorption chamber which is filled with an absorbent material that has an absorbent effect for airborne sound, a straight-through pipe that carries exhaust gas during operation of the muffler and passes through the housing, and at least one blind pipe that is connected at one end laterally to the straight-through pipe and is sealed at the other end. The blind pipe has a wall that is acoustically transmissive for airborne sound in an area running in the absorption chamber.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: May 5, 2009
    Assignee: J. Eberspaecher GmbH & Co. KG
    Inventors: Sascha Leng, Marco Jess, Sebastian Hutschenreuther
  • Patent number: 7367424
    Abstract: A muffler system is provided for use with an auxiliary power unit. In one embodiment, and by way of example only, the system includes an outer can, an annular baffle, and a tube. The outer can has a sidewall including a forward end, an aft end, and a cavity extending therebetween. The sidewall is disposed about a first longitudinal axis, and the cavity has a first cross-sectional area and a smaller second cross-sectional area. The annular baffle is coupled to and extends radially inward from the outer can sidewall and has an opening that is disposed about a second longitudinal axis that is non-coincident with the first longitudinal axis. The tube extends through the annular baffle opening and is spaced apart from the annular baffle to define a radial gap therebetween, comprises acoustic material, and has a length and a substantially uniform cross-sectional area along the length.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: May 6, 2008
    Assignee: Honeywell International, Inc.
    Inventors: Daniel V. Brown, Kyle D. Asplund, Joseph W. Michalski, Jr.
  • Patent number: 7364013
    Abstract: The shell main body for a muffler includes an inner shell in a cylindrical shape with a cross-section of an imperfect circle defined by small arc portions alternating with large arc portions; and an outer shell wrapping the inner shell and formed in a cylindrical shape similar to the inner shell. An end portion of the inner shell and an end portion of the outer shell are overlapped in a circumstantial direction of the shell main body to form a shell overlap portion that is capable of discharging vapor in a gap of the large arc portions formed between the inner shell and the outer shell into one of an outside and an inside of the shell main body. This shell overlapping portion is located in one of the small arc portions.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: April 29, 2008
    Assignee: Calsonic Kansei Corporation
    Inventors: Seiichi Nitta, Takao Shibata, Koichi Takahashi
  • Patent number: 7337877
    Abstract: The present invention provides a resonator for attenuating acoustic vibration from an air intake passage. The resonator includes a neck, a resonator chamber, a piston-type member, and an actuator. The neck is attached between the air passage and the resonator chamber. The neck has two overlapping portions allowing the neck to extend within the resonator chamber. The piston-type member is located within the resonator chamber and is translated by the actuator to change the volume of the resonator and the neck length. By changing the volume and neck length of the resonator, the frequency attenuated by the resonator can be adjusted.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: March 4, 2008
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Lakhi N. Goenka, David J. Moenssen, John D. Kostun, Christopher E. Shaw
  • Patent number: 7337876
    Abstract: A suction apparatus is provided with noise reduction means in one or more airflow passages for reducing noise emission from an airflow generator or the like, wherein at least one airflow passage is provided with at least one indentation with a predetermined depth extending substantially perpendicularly to the general direction of the noise in the passage.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: March 4, 2008
    Assignee: Nilfisk-Advance A/S
    Inventor: Peter Nøhr Larsen
  • Patent number: 7334663
    Abstract: A communicating pipe is disposed on an outer periphery of an air intake pipe, and a conduit is formed so as to be parallel to an air intake passage. A plurality of first communicating apertures are disposed through the air intake pipe so as to be arranged in a single row in a conduit direction and communicate between the conduit and the air intake passage. A resonance chamber is mounted to the communicating pipe so as to communicate with a first end of the conduit. A movable member is disposed so as to be movable in the conduit direction by sliding in contact with the inner wall surface of the communicating pipe. A second communicating aperture is disposed through the movable member so as to be placed above the first communicating apertures. A communicating channel length between the air intake passage and the resonance chamber is adjusted by changing a position of overlap of the second communicating aperture relative to the first communicating apertures by moving the movable member in the conduit direction.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: February 26, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tatsuya Nakayama, Mikihiko Suzuki
  • Patent number: 7293628
    Abstract: A cylindrical shell main body constituting a muffler main body is formed of two layers of an inner shell and an outer shell and has a cylindrical shape with a cross section that is not a perfect circle but is defined by alternated small arc portions and large arc portions similarly to an oval, or the like. The outer shell of the shell main body has, in each of their small arc portions, four radially projecting beads continuously extending in a circumferential direction along the small arc portions and being a predetermined distance apart from one another in an axial direction, thereby allowing an upper and lower gaps between the inner shell and the outer shell in the respective large arc portions of the shell main body to communicate with each other through passages formed by the beads.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: November 13, 2007
    Assignee: Calsonic Kansei Corporation
    Inventor: Koichi Takahashi
  • Patent number: 7281605
    Abstract: The invention relates to an exhaust silencer or muffler for an internal combustion engine, in particular a silencer with the damping characteristics of a resonator with the absorptive characteristics of a dissipative silencer. The silencer of the present invention provides an improved silencer or muffler for use with an internal combustion engine that incorporates both a dissipative silencer and a resonator in a single muffler assembly suitable for use with standard automotive construction techniques.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: October 16, 2007
    Assignees: Owens-Corning Fiberglas Technology II, LLC, The Ohio State University Research Foundation
    Inventors: Norman T. Huff, Larry J. Champney, Ahmet Selamet, Iljae Lee
  • Patent number: 7255197
    Abstract: A muffler which reduces noises of a wide frequency band with a simple structure. Sound waves of an intake duct enter into and are received in a resonance box via a branch pipe. At the branch pipe, a movable body slidingly abuts a peripheral portion of an opening of a cut-out portion. Due to the movable body rotating, a range of opening/closing of the cut-out portion is changed, and a length of a neck portion formed by the branch pipe and an arc-shaped plate, and a lateral cross-sectional surface area of a distal end of the neck portion, are changed.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: August 14, 2007
    Assignee: Toyoda Boshoku Corporation
    Inventor: Yukihisa Horiko
  • Patent number: 7117974
    Abstract: An in-line resonator for an air induction system of an internal combustion engine is provided. The system includes a resonator housing, an upstream duct, a downstream duct, a conduit, a partition, and a sleeve. The conduit extends through the resonator housing connecting the upstream duct and the downstream duct. The partition is moveable within the resonator housing and divides the housing into an upstream chamber and a downstream chamber. The downstream chamber, the conduit, and the downstream sleeve cooperate to form a first Helmholtz resonator that is in fluid communication with the downstream duct. The upstream chamber, the conduit, and the upstream sleeve cooperate to form a second Helmholtz resonator that is in fluid communication with the upstream duct. Further, a means is provided to axially move the partition to vary the volume of the chambers concurrently with the length and/or area of the passages.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: October 10, 2006
    Assignee: Visteon Global Technologies, Inc.
    Inventors: David J. Moenssen, John D. Kostun, Christopher E. Shaw, Lakhi N. Goenka
  • Patent number: 7017707
    Abstract: An HQ tube arrangement suitable for packaging within a vehicle may be designed by creating a mathematical model representing a tube arrangement having a first passageway and a second passageway fluidly connected to the first passageway at first and second junctions. The second passageway is divided by the junctions into first, second, and third passages. Lengths are associated with each of the first passageway and the first, second, and third passages. A filter parameter, based upon an average transmission loss for a particular frequency over a standard deviation, is analyzed as a function of the lengths. Lengths are chosen based upon analysis of the filter parameter. Portions of the outer walls of the first and second passageways may be secured to or common to one another so that lengths of the passageways run along side of each other to provide a more compact HQ tube arrangement.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: March 28, 2006
    Assignee: Siemens VDO Automotive Inc.
    Inventors: Zhouxuan Zia, James Kenneth Vanderveen, Ian McLean, Jason Pettipiece, Phillip Edward Arthur Stuart, Robert Franklin Glassford
  • Patent number: 6973959
    Abstract: A heat exchanger for cooling motor vehicle exhaust gases, which heat exchanger is to be fitted into an exhaust line of the vehicle and having at least three tubes in contact by way of their outer walls with cooling air, in which the exhaust gases are brought to circulate.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: December 13, 2005
    Assignee: Peugeot Citroen Automobiles SA
    Inventors: Patrick Claverie, Arnaud Vitel
  • Patent number: 6742623
    Abstract: A muffler for an internal combustion engine is disclosed which is capable of effectively enhancing its muffling effect without any substantial increase in size, weight or manufacturing cost. The exhaust gas ejected from an exhaust port of the internal combustion engine is divided in the muffler into at least two flows. The divided exhaust gas flows are subsequently impinged against each other before the divided exhaust gas flows are finally discharged from a final exhaust port to the external atmosphere. More specifically, this muffler comprises an expansion chamber into which the exhaust gas is to be introduced from the exhaust port, and the expansion chamber is provided with at least two impingement openings for enabling the exhaust gas to be divided into at least two exhaust gas flows which are designed to be subsequently impinged against each other.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: June 1, 2004
    Assignee: Kioritz Corporation
    Inventors: Katsuya Tajima, Sizuo Yamamiya, Fujio Kobayashi
  • Patent number: 6510921
    Abstract: A muffler has an elongated generally cylindrical casing having inlet and outlet ends, an elongated generally frustroconical baffle in the casing adjacent the inlet end with the smaller diameter portion being spaced from the inlet end. The peripheral wall of the baffle has closely spaced perforations over the major portion of its axial length and is spaced from the shell to provide a chamber thereabout. A generally cylindrical baffle has one end extending over the smaller diameter portion of the frustroconical baffle and has its peripheral wall spaced from the casing to provide a chamber thereabout. The peripheral wall of the cylindrical baffle has closely spaced perforations over most of its length. Exhaust gases enter the frustroconical baffle and exit through the perforations therein, move axially in the casing thereabout, and then pass through the apertures into the cylindrical baffle.
    Type: Grant
    Filed: February 19, 2001
    Date of Patent: January 28, 2003
    Assignee: Samson Motorcycle Products, Inc.
    Inventor: Kenneth E. Price
  • Patent number: 6467570
    Abstract: An exhaust processor includes a housing formed to include an interior region and a partition or first spark arrester that partitions the interior region into chambers and includes a wool filter formed to include an opening. The wool filter is positioned to filter unburned carbon particles from combustion product generated by a vehicle engine. The exhaust processor further includes an outer conduit that extends through the opening formed in the wool filter and is formed to include a passage and an inner conduit that extends into the passage and is formed to include an opening through which unburned carbon particles flow from inside the inner conduit to impinge against the outer conduit so that the outer and inner conduits operate as a second spark arrester.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: October 22, 2002
    Assignee: Arvin Technologies, Inc.
    Inventor: Andrew J. Herold
  • Patent number: 5952625
    Abstract: A compact muffler has a straight through inner cylindrical casing surrounded by an outer cylindrical casing defining a closed ended sound attenuating chamber therebetween. Within the outer chamber a plurality of axially extending, radially overlying, cylindrical intermediate casings form a plurality of annular sound attenuating passages. The sound passages are configured to have entrances in fluid communication either with an especially configured slot in the inner casing or between certain passages to define a plurality of discrete sound paths, with each sound path having a set length sufficient to generate a reflection wave for attenuating a sound wave having a frequency correlated to the distance of the sound path.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: September 14, 1999
    Assignee: JB Design, Inc.
    Inventor: Ronald G. Huff
  • Patent number: 5801344
    Abstract: A double throat tuner including a second conduit concentric to a first conduit which connects the gas flow to a first volume tuning chamber having a first effective volume. The radial difference between the first and second conduits and the length of overlap of the first and second conduits in combination with the effective volume of the first tuning chamber attenuates a preselective frequency of sound. This attenuation is for a specific frequency range in addition to the overall attenuation of the complete system including a plurality of conduits serially connected by a respective chamber.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: September 1, 1998
    Assignee: Arvin Industries, Inc.
    Inventor: Andrew J. Herold
  • Patent number: 5670756
    Abstract: A silencer is comprised of an outer sleeve, an inner sleeve having a number of pores, and sound absorbing material including heat-resistant fibers packed between the outer sleeve and the inner sleeve. The sound absorbing material is wound directly around the outside of inner sleeve with two or more turns so that the thickness of wound sound absorbing material around the inner sleeve is greater than dimension of a gap between the inner sleeve and the outer sleeve to give interference between sound absorbing material and the inner and outer sleeves. The sound absorbing material with the inner sleeve is press-fitted into the outer sleeve. According to the present invention, sound absorbing material is prevented from being blown out by exhaust gas flowing through the inside of the inner sleeve so that the silencer is improved in durability.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: September 23, 1997
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Akihiko Ohtaka, Nobuyuki Yoshitoshi, Shigeo Kimura, Taketoshi Houjou, Kazuya Nimiya
  • Patent number: 5502283
    Abstract: A muffler including an offshoot path, one end of which is connected to a middle of a ventilation path so as to diverge from the ventilation path, and another end of which is closed. One portion of the offshoot path and another portion thereof are communicated through a communicating portion. Accordingly, sound waves entering the offshoot path are propagated in a direction of a closed portion, and are also propagated via the communicating portion from the one portion to the other portion.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: March 26, 1996
    Assignees: Toyoda Boshoku Kabushiki Kaisha, Nippondenso Co., Ltd.
    Inventors: Hidehito Ukai, Kazuo Kometani, Kazuyuki Horie, Toshiaki Nakayama
  • Patent number: 5196653
    Abstract: A muffler for an air powered turbine drive includes a cone section made of perforated metal, a plurality of layers of sintered material on the inner surfaces of the cone section, an inner housing section substantially surrounding the cone section, an inner baffle wall between the inner housing section and the inner cone section, and an outer housing section substantially surrounding the inner housing section. Air entering the muffler through the cone section passes outwardly through the walls of the cone section and is then redirected several times before passing outwardly from the outer housing section in order to attenuate the noise in the air leaving the muffler without creating excessive muffler pressure.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: March 23, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Mark J. Kiss
  • Patent number: 5183976
    Abstract: An adjustable sound attenuating device comprised of an elongated outer main shell of a predetermined diameter, with an inlet coupling and an outlet coupling. The device has located within the shell singular or multiple independent baffle components comprised of a solid baffle plate, a perforated baffle plate, an optional perforated baffle plug, and several chambers provided by the baffle components. The solid and perforated baffle plates have a funnel shape to provide for smooth directional flow of exhaust gases. The perforated baffle plate is pierced with a plurality of openings to allow for the flow of the exhaust gases through the chambers. The perforated baffle tube is pierced with inwardly angled louvers spaced equally around the circumference and staggered to follow a spiral path lengthwise around the perimeter of the tube for routing gases through the chambers.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: February 2, 1993
    Inventor: R. J. Plemons, Jr.
  • Patent number: 5183977
    Abstract: A muffler assembly of an internal combustion engine comprises an inner casing in which is defined a first expansion chamber into which is inserted one end of the exhaust pipe having another end connected to an exhaust gas port of the engine, an outer casing disposed outside the inner casing so as to define second and third expansion chambers between the inner and outer casings, a first baffle pipe disposed so as to mutually communicate the first and second expansion chambers, a second baffle pipe disposed so as to mutually communicate the second and third expansion chambers, and a tail pipe member disposed so as to communicate the third expansion chamber and the outside of the outer casing. The inner and outer casings are formed by two plate members, respectively, which are secured together when the muffler assembly is assembled. A sound absorption chamber is formed around the outer periphery of the tail pipe.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: February 2, 1993
    Assignee: Suzuki Kabushiki Kaisha
    Inventor: Yoshihiro Horitani
  • Patent number: 5168132
    Abstract: An exhaust gas muffler comprises a double-walled casing having an inlet end receiving a stream of the exhaust gas and an outlet end for the exhaust gas, the outlet end comprising an outer tube surrounding a perforated inner tube spaced therefrom, and the tubes defining therebetween a perforation resonator chamber succeeded by a whistling sound resonator. The casing includes an outer wall and a corrugated inner wall defining a gap with the outer wall. A heat-resistant and sound-damping intermediate layer is arranged in the gap between the inner and outer walls and braces the inner wall against the outer wall. Transverse partitions divide the casing into a plurality of chambers between the inlet and outlet ends, and tubes connect the chambers and reverse the exhaust gas stream at least twice between the inlet and outlet ends.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: December 1, 1992
    Inventors: Christian Beidl, Albin Sterbenz