Abstract: A housing for an aero-acoustic processing machine having rotational drive apparatus coupled to rotate an air impeller to draw air and material to be processed through an axial inlet system and expel the air and processed material through a transverse outlet. The housing includes an enclosure incorporating at least one layer of noise attenuation materials surrounding the aero-acoustic processing machine, the enclosure having a material inlet port, an air inlet port and an exhaust port for outputting processed product with air. Airflow paths that are required for operation of the aero-acoustic processing machine are provided to enable airflow into the housing whilst significantly reducing noise emission.

Abstract: The description relates to devices and air cooling of devices. One example can include a heat generating component positioned in a housing and a temperature-based gas separation assembly configured to receive ambient air and to separate the ambient air into warmer air that is directed outside the housing and cooler air that is directed inside the housing to cool the heat generating component.

Abstract: A noise reflector configured to reduce engine sound passing below a side member of a vehicle and leaking laterally from the vehicle. The noise reflector is disposed on a lower side of a lower surface of the side member, has a sound reflective surface tilted from a vertical direction to be directed downward as being gradually laterally distant from an engine, and is configured to reflect downward engine sound received by the sound reflective surface and cause the engine sound thus reflected to interfere with engine sound passing below the side member.

Abstract: A composite oil pan for a work vehicle engine and a method of forming the composite engine oil pan include forming a sheet of metal into a first pan and open molding a fiber-reinforced polymer resin onto the first pan forming a second pan. The first pan has a first bottom wall and first peripheral walls extending from edges of the first bottom wall to define a sump, the first peripheral walls terminating in a first peripheral flange. The second pan has a second bottom wall and second peripheral walls abutting the first bottom wall and the first peripheral walls, the second peripheral walls terminating in a second peripheral flange. The first pan defines a thin metal structure with an inner surface extending across the first bottom wall, first peripheral walls and first peripheral flange; the second pan reinforces the first pan without abutting the inner surface.

Abstract: A vehicle includes an internal combustion engine, a supercharger placed behind an internal combustion engine, and a first insulator and a second insulator covering the supercharger. The first insulator is provided between the internal combustion engine and the supercharger and covers the supercharger from its front side. The second insulator covers the supercharger from its upper side, its rear side, and its lower side. An upper edge of the first insulator and an upper edge of the second insulator are positioned above and ahead of the supercharger and define a first opening. The first opening faces forward when the first opening is viewed from an inner region surrounded by the first insulator and the second insulator.

Abstract: A cooling air introduction path is formed in a base of a sound proof case of an engine-driven work machine. The base is divided into upper and lower portions, and a space in the upper portion is divided by a separation wall and arranged below an air discharging chamber. The upper part of one space is covered with a arranging plate, a partition wall is erected on the arranging plate, and a cooling air introduction port is provided between the partition wall and the separation wall to provide an engine chamber and one space are communicated, a hole is provided in the plate below the chamber, and one space and the space in the lower portion are communicated and located below the chamber. A cooling air intake port is provided on lateral walls of the lower portion to communicate the space inside the lower portion with the outside of the machine.

Abstract: Embodiments disclosed herein include a sound attenuating enclosure defining an interior space, formed by a plurality of composite panels. In some embodiments the composite panels include a frame having a plurality of elongate frame members coupled to one another. The frame defines an inner side facing toward the interior space and an outer side facing away from the interior space. Additionally, some embodiments may include an outer skin secured to the outer side of the frame, an inner skin secured to the inner side of the frame, and a foam layer disposed between the outer skin and the inner skin and between at least a pair of the frame members.

Abstract: A genset includes an enclosure and a deflector assembly. The enclosure defines an at least partially enclosed space and a ventilation air opening that fluidly couples the enclosed space with an environment surrounding the enclosure. The deflector assembly includes a deflector disposed within the enclosed space and an angle driver. The angle driver is structured to adjust an angular position of the deflector relative to the ventilation air opening to minimize exported noise.

Abstract: An engine bay structure of a vehicle is provided, which includes a capsule cover surrounding an engine. The capsule cover includes a lid part configured to cover the engine from above and a side wall part configured to cover the engine from outside in a vehicle width direction. The side wall part is divided in a vehicle front-and-rear direction into a plurality of vertical walls extending in an up-and-down direction, and one of the plurality of vertical walls is a specific vertical wall to which an electric component is attached at a side surface part thereof opposite from the engine.

Abstract: There is provided a maintenance cover member including: a cover body for closing an opening of a power train of a vehicle; and a vibration suppressing member attached to a surface of the cover body. There is also provided a maintenance cover member including: a cover body for closing an opening of a power train of a vehicle; and a plurality of vibration suppressing members attached to a surface of the cover body. Adjacent vibration suppressing members are disposed spaced apart from each other.

Abstract: A cascade array includes a first strongback having a first thermoset or thermoplastic composite material. The cascade array further includes a second strongback having a second thermoset or thermoplastic composite material. The cascade array further includes a first vane that is coupled to the first strongback and the second strongback and includes a third thermoset or thermoplastic composite material.

Abstract: Example methods, panels, and systems are disclosed for providing noise insulation. Noise insulation may be provided by an anti-resonant panel that includes a base panel including a base panel core material and two base panel face sheets, where each of the two base panel face sheets is adjacent to an opposite side of the base panel core material. The anti-resonant panel further includes at least one stiffener-member positioned along the base panel in a defined area of the base panel, where the defined area is less than a full area of the base panel. The stiffener-member includes a stiffener-member core material and two stiffener-member face sheets the stiffener-member face sheets adjacent to an opposite side of the stiffener-member core material.

Abstract: A utility vehicle powertrain enclosure includes an engine and a transmission mounted to a carrier under a utility vehicle cargo box and substantially enclosed by the carrier and a plurality of panels. The carrier has a forward end pivotably attached to a frame member of the utility vehicle, and sides flexibly connected to panels alongside the engine, and a rearward end mounted to the utility vehicle with a pair of suspension members.

Abstract: A system is provided for automatically shutting down an engine of a portable or handheld device in response to the engine operating while in an enclosed space, such as a garage, shed, room, etc. to prevent dangers associated with carbon monoxide accumulating in the enclosed space. The engine has an oxygen sensor in its exhaust that is configured to detect the presence or absence of oxygen in the exhaust. A fuel injector injects fuel for combustion within the combustion chamber. The oxygen sensor may be a switch producing an associated frequency indicating the presence or absence of oxygen. This frequency can control the fuel injection duration such that as the frequency of switching decreases, the injector injects less fuel. If the frequency continues to decrease even while injection is reduced, the controller can assume the engine is operating in confined spaces and can shut down the engine.

Abstract: A fiber composite component is provided, particularly for a vehicle structure, having a fiber structure which includes at least one fiber layer, wherein at least one of the at least one fiber layers is formed from a number of pre-formed fiber mats, and a first pre-formed fiber mat has a greater fiber mat thickness than a second pre-formed fiber mat from the number of pre-formed fiber mats of the at least one fiber layer. A method for producing a corresponding fiber composite component is also provided.

Abstract: The invention comprises a transaxle having an electric motor that is controlled by a vehicle user and that drives at least one output axle. The transaxle includes a power generating device that powers the electric motor and a reduction gear train engaged to and driven by the electric motor. The transaxle includes a common housing in which the power generator, the electric motor, and the reduction gear system are each disposed. In dual-axle systems, the transaxle also includes a differential engaged to and driven by the reduction gear system to power a pair of oppositely extending output axles. The differential is also disposed within the common housing.

Abstract: In one aspect of the invention there is provided a method of manufacture of an assembly comprising: forming an assembly by coupling a first component (150) to a second component (110) in spaced apart relationship therewith by means of coupling means (131); providing thermally activated seal means between the components, the first component, second component and seal means being arranged such that a gap exists between the first and second components allowing fluid flow therethrough; and subjecting the assembly to heat thereby to cause the seal means to expand and bridge the gap between the first and second components thereby to form a fluid tight seal between them.

Abstract: An engine is disposed below an operator's seat in such a manner that a flywheel housing is located at the front of a traveling machine body. An exhaust gas purification device is disposed behind the engine and below a radiator. The engine is connected, on the left side thereof, to an air cleaner for taking in fresh air, and is connected, on the right side thereof, to an exhaust pipe which is connected to the air inlet side of the exhaust gas purification device.

Abstract: Idle relief mufflers are configured to discharge exhaust gases from an outboard motor to atmosphere surrounding the outboard motor when an internal combustion engine of the outboard motor is operated at idle and at low speeds. The idle relief mufflers comprise a housing having an open interior, an inlet port configured to convey the exhaust gases to the open interior, and an outlet port configured to discharge the exhaust gases from the open interior. An exhaust grommet is connected to the outlet port. The exhaust grommet comprises a body that is configured to engage with a cowl of the outboard motor and an extension that extends through the outlet port and protrudes into the open interior. The extension and the body together define a through-bore that is configured to convey the exhaust gases from the open interior to the atmosphere.

Abstract: An acoustic damper includes a neck and a damping volume. The neck has a mouth being in fluid connection with a chamber. The chamber is limited by an inner surface of at least one wall. The acoustic damper device includes a recess located between the mouth of the neck and the inner surface of the wall.

Abstract: A sound attenuating trim part, including at least one insulating area with an acoustic mass-spring characteristics having at least a mass layer and a decoupling layer adjacent to the mass layer, whereby the mass layer consists of a porous fibrous layer and a barrier layer, with the barrier layer being located between the porous fibrous layer and the decoupling layer and all layers are laminated together, and whereby the porous fibrous layer at least in the insulating area has adjusted dynamic Young's modulus (Pa) such that the radiation frequency of is at least 3000 (Hz).

Abstract: Device for damping sounds which comprises a casing (11) around one or more sound-generating equipment items, and a sound-damping panel (20) via which air flows out from the casing. The sound-damping panel has a throughflow space (23) between a first wall (21) which faces towards the inside of the casing and a second wall (22) which extends along and at a distance from the first wall. The first wall has a plurality of apertures (24) for air to flow into the throughflow space. Diffusers (25) on the second wall directly opposite each aperture deflect the air which flows towards the second wall into various different directions in the throughflow space. At least some of the internal surfaces of the throughflow space are covered with sound-absorbing material (29). Air flows from the throughflow space to the surroundings via outlet apertures (31) of the sound-damping panel.

Abstract: A structure of a soundproof cover for an engine room is mounted on a body frame at a rear side of the engine room in which an engine is mounted. The structure may include two or more piece members that are detachably coupled to each other and collectively form the soundproof cover in a panel shape. The soundproof cover is to be mounted on the body frame so that one side surface of the soundproof cover is directed toward the engine and the other side surface of the soundproof cover is directed toward an interior of a vehicle.

Abstract: The invention concerns a multilayer composite material comprising at least one core (3) interposed between two external layers (1, 2), wherein: —the core (3) is a layer of thermoviscous fluid at room temperature, said thermoviscous fluid having a dynamic viscosity coefficient greater than 100 Pa·s at room temperature, —each external layer (1, 2) is in a material in the solid state at room temperature, each external layer having a surface mass of less than 8 kg/m2.

Abstract: A general-purpose liquid-cooled engine delivers a coolant cooling an engine body to a radiator and delivers a cooling air to the radiator by use of a cooling fan to cool the coolant. A cover structure of the general-purpose liquid-cooled engine covers the engine body and the radiator. An engine cover is configured so as to allow the cooling air to be delivered to the radiator. A muffler cover covers a muffler disposed adjacent to an external surface of the engine cover. An exterior cover covers an entire engine including the engine cover and the muffler cover.

Abstract: Sound-damping housing for a pump and for a drive motor for said pump, comprising a block-like casing assembled from sound-damping panels and provided with a support construction and a first door opening for successively placing into and removing from the casing the pump and its drive motor on the support construction, and with at least one guide extending over the support construction transversely of the door opening for the purpose of guiding a pump and its drive motor to be placed in the casing.

Abstract: A cover member includes: a cover body that is located such that a reverse surface of the cover body faces an engine; a sticker that has a sticker body and an adhesive layer, the sticker body being formed such that the sticker body covers an aesthetically-designed concave portion that is formed on a top surface of the cover body, the adhesive layer being provided on a reverse-surface side of the sticker body to adhere the sticker body to the cover body; and a communication path that communicates an interior of the aesthetically-designed concave portion with the atmosphere.

Abstract: A high-pressure fuel injection pump, including a sound-damping acoustic cover, is mounted on an engine and is part of a direct-inject fuel system for a vehicle. In an exemplary embodiment, the acoustic cover includes a top portion that fits over the fuel injection pump and a side portion that mechanically engages the fuel injection pump, and at least one of the top or side portions is formed from a sound-damping metal laminate material. Sound and/or vibrations that emanate from the fuel injection pump may be transferred to the acoustic cover and converted into thermal energy by the sound-damping metal laminate material.

Abstract: An on-base enclosure for equipment is disclosed. The on-base enclosure has walls attached to a base for equipment such that the walls are attached to the base at a distance away from the base. By providing the walls away from the base, more room is provided around the equipment within the enclosure.

Abstract: A baffle arrangement for a genset enclosure is disclosed. The genset enclosure may include an opening in a side of the enclosure and a plurality of baffles internally supported in the enclosure between the opening and a radiator portion. The baffles may be positioned in a sound path to reflect a sound transmitted along the sound path. A method for reducing sound in a genset enclosure is also disclosed. The method may include arranging a plurality of baffles within the enclosure between an opening and a radiator portion, the baffles being positioned in a sound path to reflect a sound transmitted along the sound path.

Abstract: Device for damping sounds which comprises a casing (11) around one or more sound-generating equipment items, and a sound-damping panel (20) via which air flows out from the casing. The sound-damping panel has a throughflow space (23) between a first wall (21) which faces towards the inside of the casing and a second wall (22) which extends along and at a distance from the first wall. The first wall has a plurality of apertures (24) for air to flow into the throughflow space. Diffusers (25) on the second wall directly opposite each aperture deflect the air which flows towards the second wall into various different directions in the throughflow space. At least some of the internal surfaces of the throughflow space are covered with sound-absorbing material (29). Air flows from the throughflow space to the surroundings via outlet apertures (31) of the sound-damping panel.

Abstract: An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust.

Abstract: An engine arrangement for a vehicle, such as a commercial vehicle such as a truck, includes subsequently arranged and encompassed in a casing an engine block, an engine transmission and a flywheel. A noise shield patch is arranged at a circumferential section of the casing corresponding to the location of the flywheel and/or the engine transmission overlaying not more than 75% of the circumferential section. The patch is arranged predominantly beneath the casing.

Abstract: A construction machine capable of effectively reducing noise which would intrude into a cab, without deterioration in ride quality, comfort and air-conditioning efficiency in the cab is provided. The construction machine includes a lower propelling body, an upper slewing body including an upper frame, a cab including a floor plate and installed on the upper frame, and a cab noise reduction device. The cab noise reduction device includes: the floor plate; an under-cab member including a cab deck supporting the cab and provided under the cab to define a closed-form under-cab space whose periphery is substantially closed, in cooperation with the floor plate; and a resonator reducing noise in the under-cab space by a resonance effect.

Abstract: A crankcase of an internal combustion engine includes protruding portions formed on an outer surface of the crankcase which are constituted of a pair of left and right wall members, and a vibration isolating rubber is fitted between the wall members. The crankcase configured in this manner prevents the generation of sounds from a protruding portion of the crankcase and is light-weight.

Abstract: An acoustic dampener comprises a first wall, orifice plate, and second wall. The first wall separates a first fluid source from a second fluid source. The first wall has a hole for allowing fluid communication between the first fluid source and a first cavity of the acoustic dampener. The office plate separates the first cavity of the acoustic dampener from a second cavity of the acoustic dampener. The second wall has a hole for allowing fluid communication between the first cavity of the acoustic dampener in the second cavity of the acoustic dampener. The second wall separates the second cavity of the acoustic dampener from the second fluid source. The second wall has a hole for allowing fluid communication between the second cavity of the acoustic dampener and the second fluid source. In one embodiment, the acoustic dampener is formed in a combustion chamber liner of a gas turbine engine.

Abstract: The sound insulation cover includes: a cover member 21 that is externally mounted on an exhaust manifold and that insulates transmission of noises to the outside; and a fixing means 22 that is combined with an opening 21a formed in the cover member 21 in correspondence to a fixing portion 18a of the exhaust manifold and that fixes the cover member 21 to the fixing portion 18a of the exhaust manifold. The fixing means 22 has: a ring-shaped cover holding plate 23 fixed to the cover member 21 along the edge portion of the opening 21a of the cover member 21; and a disk-shaped plate 24 fixed to the fixing portion 18a of the exhaust manifold. The inner peripheral portion of the cover holding plate 23 and the outer peripheral portion of the fixing plate 24 are formed into a ring-shaped depressed-projected fit portion 25.

Abstract: An engine room for construction equipment is provided, which can minimize emission of noise generated in an engine room due to driving of an engine and a ventilating fan to an outside of the engine room by absorbing the noise through a noise trap, and can improve the cooling performance of corresponding components by smoothing inhalation/discharge of an external air to/from the airtight engine room.

Abstract: Wall partitioning between outside and inside of a room has an opening portion closed with a film. Sound insulating plate, comprising a lamination of a sound reflecting plate and a sound absorbing member, is supported in opposed relation to the opening portion and at an interval from the opening portion. Sound transmitted from outside of the room into the room through the film is reflected from the sound reflecting plate and then diffracted via sides of the interval, defined between the sound reflecting plate and the wall, to behind the reflecting plate to reach a human listener. Thus, with a mechanical construction, sound, propagated from outside the room into the room, can be made to be heard as sound of frequency characteristics desired by a human listener present in the room.

Abstract: A ram intake unit mounted on a front portion of a frame structure of a motorcycle includes an acoustic material disposed along an inner wall of a ram air intake duct for absorbing induction noises, which duct forms an induction system through which an incoming wind can be introduced towards a motorcycle combustion engine, and a holder disposed inwardly of the acoustic material for securing the acoustic material to the ram air intake duct.

Abstract: A vehicle interior structure that may realize a more amenable vehicle interior space by making communication between occupants sitting on a pair of vehicle seats easier. The vehicle interior structure includes: a pair of vehicle seats; and a sound-reflecting communication unit for conveying a sound produced from occupants sitting, respectively, on the pair of vehicle seats to the other occupant, while reflecting and converging the sound. The sound-reflecting communication unit forms a concave shape along a virtual ellipse, focuses of which are respectively at positions of heads of the occupants.

Abstract: A polyurethane foam for vehicles is obtained by reaction, foaming, and curing of a polyurethane-foam raw material comprising polyol, polyisocyanate, a blowing agent, and a catalyst, and is used for vehicle parts. The foam raw material comprises expanded graphite and an inorganic compound hydrate. The polyol preferably comprises polymeric polyol in which a polyether polyol is graft-polymerized with a vinyl monomer, polyether polyol having a mass average molecular weight of from 400 to 1,000, in which a polyhydric alcohol is addition-polymerized with an alkylene oxide, and polyether polyol having a mass average molecular weight of from 2,000 to 4,000 in which a polyhydric alcohol is addition-polymerized with an alkylene oxide.

Abstract: A cylinder head cover, a system, and a method are disclosed for sealing a cylinder head and isolating cylinder head vibrations from a cylinder head cover body. An example cylinder head cover may include a bottom carrier having a first end configured to be disposed in sealing engagement with a cylinder head. The bottom carrier may also have a second end. A cover body may be configured to provide a covering surface, and may have a side wall extending toward the cylinder head. A resilient joining element may connect the bottom carrier second end to an edge of the cover body side wall in sealing engagement.

Abstract: The present invention provides novel acoustic bumpers that can dampen vibrations and control noise transmission from an engine front cover, or other component. In one embodiment, the front cover carries a water pump and internal water distribution passages and covers an overhead camshaft drive mechanism and an oil pump mounted on the engine block. Noise control of unsupported cover central portions is provided by acoustic bumpers carried on inside cover bosses and engaging surfaces in accessible locations on the engine block front face or on associated components. The acoustic bumpers may be doughnut shaped annular rings having identical coaxial locating recesses on opposite sides for error-free installation. A central web between the recesses includes an axially located retainer hole. Each bumper may be mounted on a pillar on the inside cover face that includes a fastener receiving blind hole centrally located on a raised circular boss.

Abstract: A wrap-around cover or noise muffler of oil and temperature resistant noise absorbing resilient elastomer covers the front and sides of a front mounted engine oil pump forming a pump and muffler assembly. The muffler absorbs vibrations and reduces the transfer of noise frequencies from the oil pump to an engine front cover that covers the pump. Additionally, the front of the muffler is shaped to fill the gap and engage the front cover in compression between the oil pump and the rear surface of the front cover, thereby damping vibrations of the front cover adjacent to the oil pump and to an accessory drive pulley that rotates ahead of the front cover for driving accessories.

Abstract: To enhance the noise reducing effect of a sound insulation structure which includes a cover member for covering a power unit from the outside so as to reduce the radiant sound generated from the power unit, and a resonator. A sound insulation structure includes an armor cover for covering a left case half and a left cover constituting a side part cover of the power unit from the left side so as to reduce the radiant sound generated from the side part cover and enhance an appearance quality of the power unit, and the resonator capable of resonating at a specified frequency of the radiant sound. The resonator is disposed in a space formed between the side part cover and the armor cover in the state of being out of contact with the armor cover, and is attached to the side part cover in contact with the latter.

Abstract: A passive noise attenuation device and system is provided having a reticulated open-cell porous structure configured to acts as a passive control device in order to mitigate combustion noise and instability problems in combustion systems. A porous inert media structure is placed downstream of the reaction zone of a combustion chamber to dissipate noise and/or instability generated upstream in the flame. The porous inert media also limits and/or disintegrates vortical structures in the flame to produce a homogeneous flow field to facilitate distributed reaction zones.

Abstract: A heat expandable baffle for sealing automotive cavities comprising a carrier plate with an outer perimeter and a strand of a heat expandable material along the major part of the outer perimeter, this strand circumscribing a central section of the carrier plate which is not covered by the heat expandable material, the outer perimeter defining a mean plane limited by the outer perimeter, the central section of the carrier plate being bent away from the mean plane in a way that the point on the central section which has the greatest distance from the mean plane lies at a distance from the mean plane which is at least 5% of the maximum linear length of the carrier plate, and/or the central section having a lumped mass distribution.

Abstract: A material for processing includes an elastically deformable single thin plate comprising a plurality of through-holes. The plate has a first wave-like shape, which is formed in a first direction and, in which troughs and ridges are alternately connected in repetition, and a second wave-like shape which is formed in a second direction crossing the first direction and in which troughs and ridges are alternately connected in repetition. The first wave-like shape has a corrugated shape in which the ridges each include a pair of side parts rising from the corresponding troughs and an apex part connected between the pair of side parts. An apex length of the apex part along the first direction is defined as being longer than an opening length, along the first direction, between base parts of the pair of side parts.

Abstract: An exhaust system for an electric power generation system is disclosed. The exhaust system may include a muffler configured to suppress noise associated with operation of an engine associated with the electric power generation system. The muffler may be configured to be mounted in a roof of a housing configured to contain at least part of the electric power generation system. The muffler may be configured to form an outside surface of the roof. Removal of the engine from the housing may be facilitated by removal of the muffler from the roof, such that the engine can be lifted out of the housing.