Abstract: A ventilation component includes a circumferential wall. At least a part of the circumferential wall is formed by the wall portion, which includes the inner layer and the outer layer. The inner layer contains fibers and has permeability, and the outer layer is provided on the radially outer side of the inner layer and has elasticity. The wall portion forms a vibration system including the inner layer as a mass portion and the outer layer as a spring portion. The vibration system has a partially varying natural frequency.

Abstract: Frequency adjustable quarter-wavelength resonators have a movable end wall defined by a surface of a sphere that is moved within the resonator tube. The sphere can be ferromagnetic, enabling it to be moved by magnetic interactions with moving external magnetic elements, or by a variable external magnetic field, controlled by power modulation to external electromagnets. The resonators can optionally be helical or otherwise curved, and the spherical shape of the structure forming the end wall enables it to navigate curves in the resonator tube.

Abstract: An intake device for an internal combustion engine includes: a main pipe having an upstream end forming a suction port and a downstream end configured to be connected to an intake port of an internal combustion engine main body; a compressor of a supercharger provided in the main pipe; an intercooler provided in the main pipe at a position downstream of the compressor and including a cooling part, an upstream header provided upstream of the cooling part, and a downstream header provided downstream of the cooling part; a throttle valve disposed in the main pipe at a position downstream of the intercooler; a bypass pipe having a first end and a second end, the bypass pipe being connected to a part of the main pipe between the cooling part and the throttle valve; and a catch tank provided in the bypass pipe and configure to catch condensed water.

Abstract: An air intake system includes an air cleaner for housing an air filter element therein above an off road vehicle engine, and a surge tank, which buffers the filtered air, at a location beside the engine. A descending tube from the air cleaner connects into a top cover of the surge tank, and an outlet tube of the air intake system extends horizontally from the top cover of the surge tank for connection into the throttle of the engine. A vapor recovery pipe connect the crankcase of the engine, lower than the outlet tube, back up to the air cleaner upstream of the filter element. The surge tank includes a tank bottom casing removably connected to a tank upper cover, with the descending tube and the outlet tube connecting into the tank upper cover.

Abstract: An intake manifold that allows air to flow through the intake manifold, engine, and exhaust from the engine, until the engine is cooled to a desired temperature.

Abstract: Road vehicle having: a passenger compartment; an internal combustion engine provided with at least one exhaust duct, which originates from an exhaust manifold and has at least one exhaust gas treatment device; and an exhaust noise transmission device provided with a transmission duct, which originates from the exhaust duct, and with a symposer device, which is arranged inside the transmission duct, is pneumatically insulating and is acoustically permeable; an inlet of the transmission duct being arranged between the exhaust manifold and the exhaust gas treatment device, hence upstream of the exhaust gas treatment device.

Abstract: A system for reducing noise associated with a compressor of an engine system comprises an intake manifold and a resonator comprising an outlet. The resonator is coupled to, and is positioned adjacent to, the intake manifold. An outlet pipe is in fluid communication with the outlet and the compressor, and a length of the outlet pipe extends from the outlet to the compressor. Positioning the resonator adjacent to the intake manifold reduces the length of the outlet pipe so as to reduce noise associated with air flowing through the outlet pipe.

Abstract: An introduction pipe has a first communication pipe, which is branched from a first intake passage and is connected to a resonator box, and a second communication pipe, which is branched from a second intake passage and is connected to the first communication pipe. The length of the first communication pipe between the branch point at which the first communication pipe is branched from the first intake passage and the connection point at which the second communication pipe is connected to the first communication pipe is defined as a first length. The length of the second communication pipe between the branch point at which the second communication pipe is branched from the second intake passage and the connection point at which the second communication pipe is connected to the first communication pipe is defined as a second length. The first length is unequal to the second length.

Abstract: A marine drive has a propulsion unit, a supporting cradle, a resilient mount that couples the propulsion unit to the supporting cradle, a sound blocking member that extends across an internal gap between the propulsion unit and the supporting cradle, and a cowling system having upper and lower cowlings that cover at least a portion of the propulsion unit and lower cradle covers that cover at least a portion of the supporting cradle. The upper and lower cowlings are separated from the lower cradle covers by an external gap so that the upper and lower cowlings can move along with the propulsion unit and with respect to the supporting cradle and the cradle covers. The sound blocking member blocks the sound which otherwise would emanate from propulsion unit via the internal gap and then from the marine drive via the external gap.

Abstract: To provide an intake manifold which can reliably prevent the step from being formed in the inner wall surface of the intake passage (15) while having provided therein the fitting holding portion (32) for fitting and holding the flame arrester (25) in the axial direction, the intake manifold (10) includes a base member (21), a cover member (22) and a flame arrester (25) having a flame suppression structure. Between the flame arrester (25) and the radical stepped surface (31b) of the recessed body portion (31) is provided a retaining rectifying member (23) that prevents the flame arrester (25) from coming off with respect to the fitting holding portion (32) and forms a third inner peripheral surface (23a) continuous without a step from an opening portion on the other end side (25b) of the flame arrester (25) to the base side second inner wall surface (31c).

Abstract: An air cleaner for an internal combustion engine is arranged to reduce intake noise. The air cleaner includes an air cleaner element for cleaning an intake air, and an elastic member for reducing intake noise by utilizing an inside space of the air cleaner. An inside space of the elastic member is in communication with the inside space of the air cleaner through a communication passage. Preferably, a surrounding space formed between the elastic member and a case portion for receiving the elastic member is opened to the outside.

Abstract: A system for managing noise, vibration and harshness (NVH) based on floor vibration for a vehicle, may include a vibration sensor, which is disposed on a floor of a vehicle and detects a vibration value; and a control module, which controls an operation of a vibration generating device of the vehicle in response to the vibration value detected by the vibration sensor, wherein when the vibration value detected by the vibration sensor exceeds a predetermined first threshold value, the control module decreases the vibration by adjusting a driving parameter of the vibration generating device of the vehicle.

Abstract: The present disclosure relates to gas turbines and to a damper assembly for a combustion chamber of a gas turbine. A damper assembly as disclosed herein may be adjusted to different frequencies during operation and/or deactivated for different operation regimes.

Abstract: An air intake system includes a plurality of intake runners configured to supply intake air to the engine, and an independent resonator system operably associated with the plurality of intake runners and including a plurality of individual resonator assemblies. Each individual resonator assembly is fluidly coupled to one intake runner of the plurality of intake runners. The plurality of individual resonator assemblies is configured to interact with at least one of sound and pressure waves generated in the engine to reduce engine noise and/or increase engine torque.

Abstract: An intake manifold for an internal combustion engine includes branch pipes, each of which is connected to one of intake ports and has an intake passage, valve cases, each of which is provided to one of the branch pipes and connected to the corresponding intake port, branch pipe bodies, each of which is connected to the upstream end of one of the valve cases, valves, each of which is provided in one of the valve cases to change the cross-sectional area of the intake passage of the corresponding branch pipe, and a coupling portion, which is located between downstream ends of each adjacent pair of the branch pipe bodies to couple the downstream ends to each other.

Abstract: The present disclosure relates to modular filtration cassettes for filtering liquids including, for example, liquids used in semiconductor manufacturing. A filter housing may define a filter cavity comprising an upstream portion and a downstream portion. The filter may further comprise a filter element disposed in the filter cavity. The filter element may at least partially overlap the filter inlet on a first side of the filter element. The filter element may comprise a rectangular pleated filter with a set of pleats having a first set of pleat tips on an upstream side of the filter element and a second set of pleat tips on a downstream side of the pleated filter.

Abstract: A fresh air system for an internal combustion engine may include an inlet section, an air filter and a connecting section fluidly connecting the inlet section to the air filter. The air filter may include a filter element arranged in a filter housing, and a housing cover closing the filter housing and configured to be removable from the filter housing to change the filter element. The connecting section may be movably connected to the inlet section on an inlet side and detachably connected to the housing cover on an outlet side. To change the filter element when the inlet section is connected to the connecting section, the connecting section may be detachable from the housing cover and adjustable relative to the filter housing to such an extent that the housing cover can be removed from the filter housing.

Abstract: An air duct of this disclosure includes: a tubular duct body formed from a non-air-permeable material; and a tubular opening end member formed from an air-permeable material. The opening end member is integrated with an end portion of the duct body so as to extend a duct wall of the duct body. D representing a diameter of the opening end member and L representing a length thereof satisfy a relationship 0.1D?L?1.5D. An air permeability of the air-permeable material is in a range of 0.3 to 100 sec/300 cc.

Abstract: An intake sound introducing apparatus has, for example, a branch pipe, a sound creator, a communication pipe, and a resonator. The branch pipe branches from an intake pipe of the engine. The sound creator includes a vibrator that vibrates with the intake pulsation of the intake sound propagating within the branch pipe. The communication pipe provides communication between the inside of a casing of the sound creator and the inside of the cabin. The resonator is provided in the communication pipe.

Abstract: A resonator for attenuating sound waves produced by an engine is provided. The resonator includes a housing. The housing includes first, second and third portions defining first, second and third working chambers, respectively. The first, second and third portions cooperate to define a substantially T-shaped resonator operable to attenuate sound produced by the engine.

Abstract: A Helmholtz resonator communicates with an interior of an intake passage, which is configured to draw intake air to a combustion chamber of an engine. The Helmholtz resonator has a volume chamber and a communication pipe. The volume chamber forms a resonance chamber. The communication pipe communicates the volume chamber with the intake passage. The communication pipe includes an acoustic stack, which is configured to cause a temperature gradient by utilizing an acoustic energy.

Abstract: A fluid line includes a resonator having an inner part and a blow-molded outer part defining an inner surface. The inner and outer parts are fixedly connected. The inner part is an injection-molded part having first and second radial collars spaced axially apart from each other. The inner part defines a radial circumference with a plurality of orifices formed therein. The inner and outer parts are axially one within the other so that there is no throughflow of secondary air between the first and second radial collars and the inner surface of the outer part. The inner and outer parts have a common end whereat they are airtightly connected to each other. The inner part, the radial collars and the inner surface of the outer part conjointly define two resonant chambers operatively connected to fluid in the fluid line via the orifices.

Abstract: A Helmholtz resonator communicates with an interior of an intake passage, which is configured to draw intake air to a combustion chamber of an engine. The Helmholtz resonator has a volume chamber and a communication pipe. The volume chamber forms a resonance chamber. The communication pipe communicates the volume chamber with the intake passage. The communication pipe includes an acoustic stack, which is configured to cause a temperature gradient by utilizing an acoustic energy.

Abstract: A bottom inner wall of an air cleaner case is provided with a first and second bulging parts and roughly U-shaped in section which have projected surfaces on the inside of the air cleaner case and recessed surfaces on the outside of the air cleaner case. First and second resonators are formed by a structure wherein first and second compartments continuously surrounded by the first and second bulging parts as well as a pair of side inner walls, the bottom inner wall and a partition wall of the air cleaner case are closed with first and second lids provided with communication holes.

Abstract: A control device of a motor vehicle having a noise transmission system and an exhaust system, wherein the noise transmission system has, for manipulating an interior noise of the motor vehicle, at least one intake noise transmission device which can be coupled via a first tubular connecting element to an air intake pipe leading to an internal combustion engine, the first tubular connecting element being assigned a switchable shut-off device, and which can be coupled via a second tubular connecting element to a vehicle interior, wherein the exhaust system has at least one switchable shut-off device for manipulating an exterior noise of the motor vehicle, and wherein the control device manipulates the operation of the noise transmission system and of the exhaust system jointly as a function of an actuation of a common operating element by the driver.

Abstract: A sound transmission system of a motor vehicle, having an intake sound transmission device which can be coupled via a first tubular connecting element to an air intake manifold which leads to an internal combustion engine and via a second tubular connecting element to a vehicle interior, the first tubular connecting element being assigned a first switchable shut-off device, having a resonator device which interacts with the intake sound transmission device and can be coupled via a third tubular connecting element to the air intake manifold which leads to an internal combustion engine, the third tubular connecting element being assigned a second switchable shut-off device.

Abstract: An intake apparatus includes an intake pipe, a resonator and a blowby gas recirculation pipe. The resonator includes a volume portion having a volume chamber therein and a connecting pipe connecting the volume portion and the intake pipe and having a connecting passage connecting the volume chambera and the intake passage. The blowby gas recirculation pipe includes an internal passage therein. The blowby gas recirculation pipe is connected to an axially midway portion of the connecting pipe, and an exit of the internal passage is connected to the connecting passage of the connecting pipe.

Abstract: Methods and apparatuses are provided for an air inlet duct of an internal combustion engine. The air inlet duct includes a tubular housing. An inner wall has a plurality of perforations. The inner wall is disposed within the tubular housing such that the tubular housing includes at least two flow passages. A valve set is associated with a first flow passage of the at least two flow passages. The valve set selectively controls airflow through the first flow passage such that the first flow passage functions in a least one of a pass-through mode and a tuning mode.

Abstract: An active control sound generator apparatus may include a housing disposed at an end of an intake duct in a vehicle, having an intake port at an end, and having a driving unit case thereon, a control actuator disposed at a side in the driving unit case, a valve plate disposed in the intake port and connected to a rotary shaft, wherein the valve plate selectively opens or closes the intake port, a control unit including a position sensing wheel disposed at an end of the rotary shaft of the valve plate, in the driving unit case to measure a rotation amount of the valve plate, and a driving gear assembly engaged with the valve plate and the rotary shaft, in the driving unit case, and reducing and transmitting torque of the control actuator to the rotary shaft.

Abstract: A Helmholtz damper, including an enclosure, a neck extending from the enclosure, and a pipe for inserting into the neck. The portions of the pipe inserted into the neck is adjusted to regulate a resonance frequency of the Helmholtz damper.

Abstract: An internal combustion engine having a plurality of cylinders and an air intake system, with the air intake system formed from at least one distributor pipe, a plurality of intake pipes and at least one plenum, and with the plenum positioned between the distributor pipe and the intake pipes. Here, the combustion air is fed to the air intake system via an air guiding duct which opens out into the distributor pipe, with the charge pressure of the combustion air reduced between the outlet out of the compressor and the inlet into the combustion chamber. A distributor pipe length is dimensioned as a function of an equivalent distributor pipe diameter such that it is possible for a reduction in the charge pressure to be obtained within the air intake system by expansion taking place partially in the plenum in the respective intake pipe and/or within the distributor pipe.

Abstract: An intake tract is provided for combustion air of a vehicle. The intake tract includes, but is not limited to an intake opening and an intake channel. At the end of the intake channel a sound source is arranged, which is sound-dampened by a sound damping device in the intake channel. An air filter is arranged between part regions of the intake channel and downstream of the air filter an air mass sensor is provided in an intake channel section, wherein the intake channel section of the air mass sensor includes, but is not limited to the sound damping device.

Abstract: A supercharger system is disclosed herein having a front end, a rear end, an inlet and an outlet, the system contained within a housing, wherein the supercharger system includes a rotor assembly, and a plurality of intake runners that comprise an interlaced cross-runner pattern, wherein the supercharger system comprises a front drive, front inlet configuration and an inverted orientation.

Abstract: An acoustic damper arrangement for a combustor which has an inner liner configured for use at a first temperature during operation and an outer liner configured for operation at a second temperature lower than the first temperature during operation is disclosed, the acoustic damper arrangement comprising: a plurality of flexible sheets; and at least one hollow body having an interior volume, each of said at least one hollow body being fixed to one of the plurality of flexible sheets, wherein the acoustic damper arrangement is configured to be fixed to both the inner liner and the outer liner such that the interior volume of the at least one hollow body is in communication with a chamber formed by the inner liner, and the plurality of flexible sheets accommodate expansion and contraction of the inner liner relative to the outer liner.

Abstract: A sound transmission system of a motor vehicle, having an intake sound transmission device which can be coupled via a first tubular connecting element to an air intake manifold which leads to an internal combustion engine and via a second tubular connecting element to a vehicle interior, having a resonator device which interacts with the intake sound transmission device and can be coupled via a third tubular connecting element to the air intake manifold which leads to an internal combustion engine.

Abstract: A bottom inner wall of an air cleaner case is provided with a first and second bulging parts and roughly U-shaped in section which have projected surfaces on the inside of the air cleaner case and recessed surfaces on the outside of the air cleaner case. First and second resonators are formed by a structure wherein first and second compartments continuously surrounded by the first and second bulging parts as well as a pair of side inner walls, the bottom inner wall and a partition wall of the air cleaner case are closed with first and second lids provided with communication holes.

Abstract: A mounting device can mount an intake manifold to an engine and includes a bending moment applying device applying a bending moment to the intake manifold as the intake manifold is mounted to the engine.

Abstract: A device for transmitting engine sound into an interior of a motor vehicle includes a sound transmission line having a first end in acoustic communication with an air intake tract and a second end arranged to direct engine sound towards the motor vehicle interior. A sound transmitting porous media is arranged in-line with said sound transmission line and restricts airflow wherein the porous media such that airflow in the sound transmission line is required to pass through said porous media.

Abstract: An intake system is provided for an internal combustion engine, which includes, but is not limited to an air purifier/resonator configuration, in which a resonator element is situated in the purified air area of the intake system as an integral component in the air outlet of the air purifier, coaxially to the air outlet.

Abstract: A resonator has a volume chamber, which is communicated with a surge tank through a communication passage. A primary intake passage communicates between a cylinder of an internal combustion engine and the surge tank. A secondary intake passage communicates between the surge tank and one of the cylinder and the primary intake passage. A passage length of the secondary intake passage is shorter than a passage length of the primary intake passage. A variable intake valve is fixed to a shaft. The variable intake valve opens and closes the secondary intake passage. A resonator valve is fixed to the shaft. The resonator valve opens and closes the communication passage. A drive device rotates the shaft to drive the variable intake valve and the resonator valve.

Abstract: To simplify the attachment of a cover member, an air intake duct 10 includes a duct body 12 having an air flow passage 14 communicating from an inlet port 12a to an outlet port 12b and a vent hole 28 communicating from the air flow passage 14 to the outside, an air permeable cover member 32, and a holding member 34 secured to extend along an outer inner circumferential surface or an inner circumferential surface of the duct body 12 and to hold a portion of the cover member 32 covering the vent hole at a location different from the vent hole 28. The holding member 34 is detachably attached to the duct body 12.

Abstract: A chamber air cleaner apparatus may include a chamber housing mounted through a connector onto an air hose wherein the air hose may be connected to a main air cleaner, an intake duct attached to an outer surface of the chamber housing wherein exterior air may be introduced into the chamber housing through the intake duct, a variable valve pivotally installed in the vicinity of the intake duct and selectively opening according to an air suction pressure applied thereto, and a filter element mounted between the intake duct and the connector within the chamber housing to purify the introduced air through the intake duct.

Abstract: An attenuator for the air inlet tract of an internal combustion engine comprises an unobstructed tube (4) having a surrounding enclosure (9) divided into a primary chamber (11) in fluid communication with the inlet tube, and a secondary chamber (12) in fluid communication with the primary chamber. Two secondary chambers (12, 13) may be provided. The arrangement can be tuned to attenuate a wide range of frequencies.

Abstract: A resonator for a vehicle is provided, including a housing having at least one chamber formed therein. The housing has at least one aperture formed in a wall thereof. The housing is in fluid communication with an air conduit of the vehicle. At least one flexible member is disposed within the chamber of the housing. The flexible member includes an outer portion and an inner extension protruding from the outer portion which vibrates to attenuate low frequency sound energy transmitted from the air conduit.

Abstract: An apparatus and method for customizing the sound emitted from an automotive vehicle during operation. Specifically, the vehicle operator uses a controller to vary the sound emitted from the engine exhaust and intake or engine compartment sounds during vehicle operation. In addition, the operator can control the sound level, sound type and sound aspect in the vehicle interior or passenger compartment and the vehicle exterior. Further, the apparatus uses an active sound control system, such as those using microphones and speakers, to customize and/or tune the sound emanating from the vehicle.

Abstract: A sound transmission system of a motor vehicle, having an intake sound transmission device which can be coupled via a first tubular connecting element to an air intake manifold which leads to an internal combustion engine and via a second tubular connecting element to a vehicle interior, the first tubular connecting element being assigned a first switchable shut-off device, having a resonator device which interacts with the intake sound transmission device and can be coupled via a third tubular connecting element to the air intake manifold which leads to an internal combustion engine, the third tubular connecting element being assigned a second switchable shut-off device.

Abstract: The present disclosure relates to a resonator, and more particularly, to a resonator installed at the rear of a turbo charger of a vehicle and combined with a Helmholtz resonator and a groove type resonator to attenuate both high-frequency noise and low-frequency noise. The resonator installed at the rear of a turbo charger of a vehicle to attenuate an inhaling noise includes: at least one Helmholtz resonator having a cavity in an air introduction path extending into a duct so that the cavity is formed in a radial direction of the duct; and at least one groove type resonator provided at the rear of the Helmholtz resonator and protruding outwards in the radial direction of the duct.

Abstract: A resonator is disclosed which includes: a sleeve insert and an outer duct sealingly coupled to the sleeve insert. The sleeve insert has a wall with a first aperture in the wall at a first axial distance, a second aperture in the wall at a second axial distance, and a rib extending radially outwardly with the rib located between the first and second apertures. The outer duct sealingly couples to the sleeve insert proximate first and second ends of the inner sleeve and at the rib. The sleeve insert and the outer duct are formed of plastic materials which are coupled by welding or via o-rings placed on the sleeve insert. Cavities, in the vicinity of the apertures, are formed in the outer duct. The cavities, which are fluidly coupled to the sleeve insert via the apertures, attenuate noise.

Abstract: An intake sound generation apparatus for an internal combustion engine, including an introduction duct connected to an intake passage of an intake system of the engine, a vibration member including a diaphragm portion which is vibrated by intake pulsation in the intake system, and a bellows portion configured to promote vibration of the diaphragm portion, the vibration member being so disposed as to cover one end of the introduction duct, and a resonance duct having one end connected to the introduction duct through the vibration member and the other end opened to an outside of the intake sound generation apparatus, the resonance duct acting to increase and emit a sound pressure of intake sound produced by vibration of the vibration member. A central axis of at least one of the introduction duct and the resonance duct is located offset relative to a central axis of the vibration member.

Abstract: A variable intake system may include a single plenum that is connected to runners and that has a space formed therein, a first barrier that divides the space inside the plenum into a first space and a second space, a first variable valve that is mounted on the first barrier to connect or isolate the first space and the second space to/from each other, a variable pipe of which one side thereof is connected to the plenum and the other side is closed, a second barrier that divides the variable pipe into at least two spaces, and a second variable valve that is mounted on the second barrier to connect or isolate the at least two spaces to/from each other to improve intake efficiency.