Abstract: A muffler includes an elongated muffler shell body with a first muffler end cap mounted on the first end of the muffler shell body in a manner defining a first muffler joint and a second muffler end cap mounted on the second end of the muffler shell body in a manner defining a second muffler joint. A louver and baffle assembly is mounted within an interior of the muffler shell body. The first end of the muffler shell body includes a first shell bead/ridge and the second end of the muffler shell body includes a second shell bead/ridge, and each of the circumferential edges of the first muffler end cap and the second muffler end cap are formed to define cap bead/ridges shaped and dimensioned for engagement with the first shell bead/ridge of the first end of the muffler shell body and the second shell bead/ridge of the second end of the muffler shell body.

Abstract: An adjustable blocking arrangement for electronic hardware or computer racks, for preventing the undesired leakage of air through rack spaces not filled with hardware. An airflow control device is provided comprising a flexible web and a magazine adapted to receive the part of the flexible web that is not deployed. The device is adapted such that a length of the web may be deployed to sealingly block a space in the rack that is not filled with hardware modules, to prevent the flow of air through the space. The device may comprising a detection system adapted to detect the space in the rack that is not filled with hardware modules, and a processing system adapted to receive a signal from the detection system, and as a function of the signal to automatically deploy or retract the flexible web so as to sealingly block the space.

Abstract: An exhaust system component (1) of an exhaust system (2) for an internal combustion engine, especially of a motor vehicle has an inner pipe (3) made of metal, which is exposed to exhaust gas during the operation of the exhaust system (2), a housing (4) made of plastic, which encloses a working space (6), and an outer pipe (5) made of metal. The outer pipe (5) is fastened at a first end area (7) to the inner pipe (3) and is rigidly connected at a second end area (9) to the housing (4) and encloses between these end areas (7, 9) an annular space (10) formed radially between the inner pipe (3) and outer pipe (5).

Abstract: One or more methods for recovering waste heat from a combustion system performing a first operation and a second operation with the waste heat are provided herein. The method can include providing exhaust from a combustion system performing the first operation to an inner housing of a heat recovery silencer. Heat can be transferred from the exhaust to a heat transfer fluid in a heat recovery flow path to form a heated heat transfer fluid. The heat recovery flow path can be formed between the inner housing and an outer housing of the heat recovery silencer to form a heated heat transfer fluid.

Abstract: An air conditioning system of a portable data center includes a shipping container, plural data-processing devices and plural airflow-driving devices. The shipping container includes a partition plate and a bottom plate. The partition plate has plural hollow portions. The data-processing devices are disposed on the partition plate. The airflow-driving devices are disposed under the partition plate and aligned with respective hollow portions for driving and guiding airflow to cool the data processing devices. Each of the airflow-driving devices includes at least one fan and an airflow-blocking structure. The airflow-blocking structure is arranged in an airflow path of a corresponding airflow-driving device. If one of the airflow-driving devices is disabled, the airflow-blocking structure of the disabled airflow-driving device is automatically closed to hinder the airflow path.

Abstract: A container data center includes a movable container, two server systems having a cold aisle and two hot aisles, two fan apparatuses, an exchanger, and an air intake apparatus. The air intake apparatus includes a number of air intake elements each defining an air channel. The fan apparatuses are operable to transfer hot airflow in the hot aisles into the heat exchanger, and then the heat exchanger transforms the hot airflow into cold airflow and transfers the cold airflow into the cold aisle through the air intake apparatus. The air intake elements are connected together and cover the cold aisle. The air intake elements of the air intake apparatus are arranged in a “V” shape along an orientation toward the airflow of the cold aisle.

Abstract: Various embodiments of reduced-size vehicles such as all-terrain vehicles (ATVs) and utility vehicles (UVs) are disclosed herein. In at least some embodiments, the vehicles include frames that are wider near the front and rear sections of the vehicles than within the mid-sections of the vehicles. This, in combination with the use of shock-absorbers that are substantially vertically oriented, allows for the opening-up of large interior cavities within the front and rear sections of the vehicles within which can be positioned large front and rear internal compartments that can provide storage/carrying capacity as well as added buoyancy for the vehicle, among other things. Also, in at least some embodiments, the vehicles can include special cooling and/or exhaust systems having components that are positioned substantially within the mid-sections of the vehicles, thus further increasing the amounts of space available for the cavities/compartments within the front and rear sections of the vehicles.

Abstract: An absorptive muffler assembly includes a first body and a second body surrounding the first body. A resilient mount having at least one resilient portion and at least one support arm supports the first body and isolates the second body from vibrations of the first body.

Abstract: A vehicle that sufficiently insulates heat between plural exhaust pipes connected to an engine. A cover member bridges over and covers the periphery of the exhaust pipes. A thermal insulation member fills in a space on a line connecting centers of the exhaust pipes, and a space in the vicinity of the line.

Abstract: A component for a vehicular exhaust pipe includes an upstream venturi forming portion for creating at least a partial vacuum interior to the component. A downstream diverter housing portion of the component has an inlet coupled to an outlet of the venturi portion. The diverter housing portion includes the diverter element positioned adjacent an output of the diverter housing portion for forcing axially central exhaust flow radially outward toward a wall of the diverter housing. The partial vacuum in the component device causes colder environmental ambient air to enter an inlet of the component. The diverter also creates a mixture of hot exhaust flow with the colder environmental air, resulting in a lower temperature of the exhaust gas exiting the component and substantial elimination of centrally disposed exhaust hot spots.

Abstract: A vehicular exhaust resonator features an exhaust inlet conduit which narrows down in a manner such as to define a venturi effect region. Air entrainment apertures in the housing of the resonator provide fluid communication between outside cooling air and an air inlet chamber in the resonator. A further air inlet aperture in an outlet conduit section of the resonator is in fluid communication with the air inlet chamber. Due to the venturi effect inside the inlet conduit, a pressure drop is created to pull air from the outside into the air inlet chamber and then into an outlet conduit of the resonator for mixing with the exhaust gas to provide cooling thereof.

Abstract: A resilient mount useful in a muffler assembly includes a support arm, a bracket arm and at least one resilient portion. In one example, the resilient portion comprises neoprene to provide a cushion between the support arm and the bracket arm. The resilient mount is for supporting at least one absorptive body within a housing and isolating the housing from vibrations of the absorptive body.

Abstract: A motor chain saw includes a housing with a housing wall, which has an opening for exhaust gases and a hood extending outside the housing through the opening, with a hood opening pointing to one side. Exhaust gases flowing from an interior of the housing in an exhaust jet (S) are guided to the outside through the opening. A fin is arranged on the opening and provides a silencer for exhaust gases directed towards a flow direction of the exhaust jet (S) escaping from the hood.

Abstract: An image forming apparatus includes a fixing device for fixing a toner image formed on a recording material by heat and an outer cover, and the outer cover is configured to be the multi-layer of an intermediate layer having a metal made wall and an acoustic absorption member for absorbing a sound, and the intermediate layer is provided with the outer cover configured to have an heat conductive member higher in heat conductivity than the acoustic absorption member.

Abstract: An integrated heat exchanger and muffler unit (50,120,140) is provided for transferring heat between a first fluid and a second fluid, and for muffling the noise of the first fluid. The unit includes a housing (52) including a first inlet (60) for the first fluid, a first outlet (62) for the first fluid, a second inlet (64) for the second fluid, and a second outlet (66) for the second fluid. The unit (50,120,140) further includes a resonator (76) in the housing (52) and connected between the first inlet and outlet (60,62) to muffle noise in the first fluid, and a heat exchanger core (11,122) in the housing (52) connected to the first and second inlets and outlets to transfer heat between the first and second fluids. In one embodiment, the heat exchanger core surrounds the resonator. In another embodiment, the resonator surrounds the heat exchanger core.

Abstract: To provide a muffler device capable of improving the discharge of exhaust gas, while discharging the exhaust gas in any desired direction. The muffler device is connected to a rear end portion of an exhaust pipe extending from an internal combustion engine of a vehicle. An exhaust outlet opening is provided that opens outwardly and laterally of the vehicle and is disposed at a rear portion of a muffler main body. The muffler main body is provided with a muffler side cover and an end cap as muffler covers. The muffler side cover includes a slit. The slit serves as an air intake guide shaped portion for guiding ambient air so that the ambient air crosses the exhaust outlet.

Abstract: In an exhaust emission control system for an engine, comprising an exhaust emission control catalyst disposed in an exhaust muffler whose inside is divided into a plurality of chambers, at least a portion of the inside of the exhaust muffler is divided into a first chamber for converting mainly NOx in exhaust gas and a second chamber for converting HC and CO in the exhaust gas. The exhaust muffler comprises: a partition wall having a conduit for guiding the exhaust gas from the first chamber to the second chamber; an exhaust gas inlet for introducing the exhaust gas into the first chamber; an external-air suction means for sucking external air into the second chamber; and a discharge pipe for discharging the external air and the exhaust gas flowing through the second chamber.

Abstract: A muffler arrangement includes an exhaust-gas muffler, which is subdivided into an inlet space and an outlet space. An exhaust-gas stub of an internal combustion engine opens into the inlet space. Exhaust gas is conducted from the outlet space into an air channel via an exhaust-gas outlet. The air channel is formed between the housing of the exhaust-gas muffler and an outer cover and extends along a side of the exhaust-gas muffler. A cooling-air component flow is branched from a cooling-air flow of a cooling-air blower and enters at a first end of the air channel. The cooling-air component flow exits again at the second end of the air channel.

Abstract: The invention pertains to a device for reducing the noise level of, and for cooling, a Component (1) with moving parts, such as a hard disk in a PC system. The device comprises a Container (2) in which Component (1) is arrayed and in which Ventilation Openings (4) are provided on opposing sides, through which an air stream can flow for cooling the component. In accordance with the invention, Component (1) is completely surrounded by Sound-muting Material (3) in Container (2) and Channels (5) are configured in Sound-muting Material (3) for adducing and exhausting the cooling air.

Abstract: A marine engine muffler is provided having a silencing element with an inclined surface defining an array of elongate slotted apertures generally disposed in circumferential alignment. The slotted apertures are preferably defined by angled sidewalls such that exhaust gas flowing therethrough is forced to travel in a path that forms a reverse angle relative to the overall exhaust flow path thus conducting exhaust gases and entrained water to reverse direction while flowing through the silencing element. The conical silencing element is specifically sized to avoid resonant vibration within the operational RPM range of the engine and is further sized relative to the combined displacement of the engine and/or cylinder bank in fluid communication therewith to avoid resonant vibrations caused by reflected exhaust gas pressure waves generated by the internal combustion engine.

Abstract: A muffler arrangement includes an exhaust-gas muffler (4), which is subdivided into an inlet space (9) and an outlet space (10). An exhaust-gas stub (3) of an internal combustion engine (1) opens into the inlet space (9). Exhaust gas is conducted from the outlet space (10) into an air channel (15) via an exhaust-gas outlet (12). The air channel (15) is formed between the housing (4c) of the exhaust-gas muffler (4) and an outer cover (16) and extends along a side of the exhaust-gas muffler (4). A cooling-air component flow (18) is branched from a cooling-air flow of a cooling-air blower (5) and enters at a first end (25) of the air channel (15). The cooling-air component flow (18) exits again at the other second end (35) of the air channel (15).

Abstract: An exhaust gas muffler is provided for an internal combustion engine, especially for two-stroke engines of manually guided implements such as power chain saws, brush cutters or the like. The muffler has a housing that includes two shells. One of the shells is provided with at least one outlet opening for exhaust gas. A cover is provided that guides the exhaust gas, and the cover has at least one discharge opening for the discharge of exhaust gas to the surrounding air. An exhaust gas chamber is formed within the cover. A screen element is disposed in the vicinity of the at least one discharge opening such that the exhaust gas stream is guided through the screen element.

Abstract: An exhaust system is provided with a structure that separates water from an exhaust stream and also attenuates the noise of the exhaust system. Water laden exhaust is directed from an inlet conduit through a perforated surface to precipitate water from the water laden exhaust stream. After the water is precipitated out of the exhaust stream, the gaseous portion of the exhaust stream continues from the inlet chamber 24 to an outlet chamber 28 and exits from the housing structure by passing through a first outlet conduit. The precipitated water passes from the housing structure through a second outlet conduit.

Abstract: The present invention relates to a muffler used in a motor vehicle for cooling the engine exhaust gases. The muffler has an internal tubular member defining an internal chamber and a middle tubular member concentric in relation to and supported on the internal tubular member. The internal and middle tubular members form a first ring-shaped chamber adapted to connect to the exhaust pipe. The muffler also has an external tubular member being concentric in relation to and supported on the middle tubular member. The middle tubular member and the external tubular member form a second ring-shaped chamber with a third inlet portion. Hence, engine exhaust gases of the motor vehicle pass through the first ring-shaped chamber and are sufficiently cooled and depressurized by cooling air that passes through the internal and second ring-shaped chambers.

Abstract: A muffler for a two-stroke internal combustion engine has an expansion chamber into which a rush of exhaust gas is introduced from the engine. In the vicinity of an exhaust gas inlet from the engine into the expansion chamber, the muffler has an external air intake for external air to be suctionally introduced into the expansion chamber by the rush of exhaust gas. With the external air introduced, carbon monoxide (CO) emission into the ambient is reduced.

Abstract: A muffler is provided for sound dampening of wet exhaust gases. The muffler comprises a canister, or housing, having an inlet and an outlet. The housing is preferably constructed of a plurality of resealable interlocking sections which can be disengaged from one another to allow opening and closing of the housing to permit exposure of the sound dampening element(s) for inspection and replacement thereof or to allow for removal, servicing and replacement of the sound dampening element(s) which are positioned therein. The sound dampening element(s) can be formed from a foamed, heat resistant moldable material, such as a closed-cell concrete.

Abstract: The cylindrical enclosure 12 of a recuperator 10 as in FIG. 2 contains an annular coaxial heat exchanger 50 full of cooling liquid 22 circulating therethrough. Exhaust gas from an internal combustion engine flows from an inlet end 32 through the heat exchanger 50, first in an axial region 15 via a conduit 14, then back through a surrounding annular region 18, then through tubes 37 to an outlet end 34. The inlet 30 and outlet 31 for the gas are in the side wall 40 of the cylindrical body 12, and the exhaust gas 11 enters and leaves via conduits 14 and 19 that are perpendicular to the side wall 40 at the inlet 30 and at the outlet 31. So the ends 41 and 42 of the body 12 are free of adjacent obstruction, and at least one of them is removable, as in FIG. 4 or FIG. 5 . Thus, the recuperator 10 can be opened and closed to make the interior accessible for inspection, cleaning, or other desired purpose.

Abstract: A lawn mower having a driver's seat mounted on a vehicle body, an engine mounted rearwardly of the driver's seat, a radiator and a radiator fan disposed between the driver's seat and engine, an engine hood for covering the engine and radiator, and a muffler disposed in a space defined by an upper rear surface of the engine and the engine hood. The hood includes a rear wall defining an exhaust grille, and the muffler has an exhaust outlet opening in a direction along cooling air flows from the radiator fan to the exhaust grille. The cooling air flowing rearwardly by action of the radiator fan passes through the radiator and flows out rearwardly of the vehicle body, carrying heat from upper positions of the engine and heat radiating from the muffler. The muffler releases exhaust gas to be entrained by the cooling air flows.

Abstract: A muffler for muffling engine operating sounds and including a cylindrical shell closed at opposite ends by double-walled closure caps. The space within the shell is partitioned into three axially contiguous chambers. A gas charging pipe projects through one end of the shell and axially within the shell, and has two pairs of facing discharge elbows for discharging gas from the charging pipe at locations in the first of the chambers. A first pair of gas transfer pipes extends from the first chamber into the central chamber to points of opposed gas discharge. A second pair of gas transfer pipes extends from the central chamber into the third or discharge chamber, and from this location, the gas passes out of the muffler via a discharge pipe.

Abstract: A nonmetal heat shield that is removably attachable directly to a muffler shell for preventing inadvertent contact with the hot shell surfaces of the muffler. The heat shield includes a plurality of raised boss portions for attaching the heat shield to the muffler shell. A non-metal spacer is located between the bottom surface of the raised boss portion and the fastening portion of the muffler shell to thermally insulate the heat shield from the muffler sufficiently to inhibit thermal degradation of the heat shield.

Abstract: An improved muffler system for mounting within a restricted engine compartment such as the engine compartment of a small off-road vehicle including a muffler surrounded by a heat shield having a plurality of apertures formed therein for selectively cooling selected certain areas of the engine compartment in conjunction with a venturi which creates a flow of cooling air from outside the engine compartment, over the engine, into the apertures, between the heat shield and the muffler to a point where the exhaust gas and the initially cooler air are mixed and subsequently exited into the atmosphere.

Abstract: A heat exchanger which includes a casing having an outer tube and an inner tube fixed therein. Holes are formed in the inner tubes and face a heat transfer surface of the outer tube. Hot exhaust gas may be passed from an inlet of the outer tube into the inner tube, through the holes in the inner tube to an outlet. Coolant water may be passed through the casing from an inlet port to an outlet port. Baffles and/or twist coils may be provided to improve heat transfer.

Abstract: A method is provided for manufacturing a heat shield for an exhaust system component. The exhaust system component preferably is of tubular nonlinear configuration. The heat shield is formed from a larger pipe having an internal diameter greater than the outer diameter of the exhaust system component. Appropriately dimensioned inwardly directed supports are formed in the larger pipe. The larger pipe then is bent into a nonlinear configuration substantially identical to the configuration of the exhaust system component. The outer pipe then is cut longitudinally in half along its entire length to define a unitary nonlinear heat shield which can be mounted to the exhaust system component. A portion of the remaining half of the larger pipe can be reattached to the heat shield to provide an air gap pipe along a portion of the length of the exhaust system component.

Abstract: A process and an apparatus for forming an air gap pipe are provided. Inner and outer pipes are bent or deformed into comparable configurations such that the inner pipe can be mounted within the outer pipe. The outer pipe then is split longitudinally by a preprogrammed cutting apparatus. The cutting of the outer pipe terminates just short of the complete longitudinal length of the pipe to facilitate rematching later in the process. The cutter includes a follower to trace the actual configuration of the pipe and thereby to offset differences from one pipe to the next. An array of clamps are provided to align the outer pipe halves relative to one another and to facilitate the reattachment.

Abstract: This invention relates to an encased engine generator having an air-cooled engine and a generator housed in a case approximately structured in a rectangular parallelepiped, wherein a fuel tank is provided along the upper surface of the case, an engine having a cooling fan at its side is disposed within the case beneath said fuel tank, a generator interlocked with said engine is disposed at the downstream side of the cooling air from said cooling fan, a silencer is disposed between said fuel tank and generator so that its outer circumference may be cooled by part of said cooling air, and operating parts such as engine operation knob necessary for operation and maintenance are provided on the wall of the case which encloses the remaining cooling air.

Abstract: A heat exchanger also serving for suppressing exhaust gas noise includes a water jacket, a water inlet header and a water outlet header together surrounding the exhaust gas flow space and a plurality heat exchanging water tubes connecting the inlet header and outlet header are provided through the gas flow space and partition walls having gas-passing connection holes is provided to partition the gas flow pass into at least two parts of mutually differing volume.

Abstract: An air gap pipe and a method for forming the same are provided. The air gap pipe includes a non-linear outer pipe and an inner pipe of identical configuration disposed concentrically within the outer pipe. The inner pipe is supported by resilient dimples in the outer pipe. The outer pipe is placed in a condition for receiving the inner pipe by longitudinally cutting the outer pipe in half with a pre-programmed plasma arc or laser cutting apparatus. The two halves of the outer pipe are secured together to provide vents, if necessary, for selective dissipation of heat.

Abstract: The apparatus is enclosed in thermally and acoustically insulating panels supported by a framework. Each panel has a peripheral gasket which seals against adjacent surfaces of the framework to provide improved thermal and acoustic insulation.

Abstract: An exhaust muffler having a protective shield to reduce noise radiation and to decrease the temperature of the exhaust gases being discharged from the muffler. The muffler is composed of an outer body enclosed at its ends by flanges, and an outer insulated shell is spaced outwardly from the body and is connected to the peripheral edges of the flanges. Holes are provided in the flanges which communicate with the space between the shell and the body so that air is drawn by convection through the space between the outer body and the shell. A tubular member is spaced outwardly of the outlet pipe of the muffler and the outer end of the tubular member projects outwardly beyond the outer end of the outlet pipe.

Abstract: A heat recovery muffler comprising an outer body and having an annular heat exchanger disposed within the body and spaced from the ends thereof. The heat exchanger is provided with a central opening and an exhaust gas inlet pipe is located within the central opening and spaced inwardly therefrom to provide an annular passage. The downstream end of the central opening of the heat exchanger is closed off so that the flow of exhaust gas entering the muffler body through the inlet pipe will be reversed and is directed upstream. The heat exchanger is formed with a plurality of tubes that provide communication between opposite ends of the body, and the exhaust gases, after being reversed in flow, then flow downstream through the tubes in heat exchange relation with a cooling medium, such as water, to cool the exhaust gases and heat the cooling medium. The cooled exhaust gases are discharged to the atmosphere through an outlet pipe in the downstream end of the muffler body.

Abstract: A muffler system positioned within the engine housing of the vehicle such as a garden tractor, includes a muffler surrounded by an open ended tubular heat shield having a venturi tube on its outer end which receives and accelerates the exhaust gases to create a flow of cooling air through the engine housing and between the muffler and the tubular heat shield for extracting heat from both the engine housing and the muffler.

Abstract: A noise suppressor for internal combustion engine exhaust, adapted for marine use wherein water coolant is discharged into the chamber of a single-walled riser and partially vaporized by the exhaust gases directed into the dome thereof for downward redirection and discharge from the lower portion of the riser chamber through a muffler element, and preferably through the hull chest and/or cover of a jet pump drive acting as the final noise barrier to atmosphere.

Abstract: A sound-damping housing suitable for use with a piece of sound-generating equipment. The housing has inner and outer housing parts, the former forming a chamber for receiving the piece of sound-generating equipment, with the two housing parts forming between themselves a second chamber for receiving a sound-damping liquid. This second chamber surrounds the receiving chamber, and suitable provision is made for allowing the piece of sound-generating equipment to be inserted into and withdrawn from the receiving chamber. By virtue of this arrangement, the sound-damping housing and the piece of sound-generating equipment may be transported separately from each other. Moreover, the liquid need not be introduced into the sound-damping housing until after the same has been transported to the place where it is to be installed, thus making it easier for the sound-damping housing to be transported.