Abstract: A diffuser nozzle for a gas turbine engine includes a housing disposed about a nozzle axis and extending between a first nozzle end and a second nozzle end. The housing defines a nozzle duct. A plurality of walls is disposed within the nozzle duct. The plurality of walls subdivides the nozzle duct into a plurality of duct sections. The plurality of walls further defines a plurality of axially-extending duct segments of the nozzle duct such that within a first axially-extending duct segment, the duct cross-sectional area of a first duct section of the plurality of duct sections is greater than the duct cross-sectional area of each other duct section and within a second axially-extending duct segment, the duct cross-sectional area of a second duct section of the plurality of duct sections is greater than the duct cross-sectional area of each other duct section.

Abstract: A system and method to improve the efficiency of an internal combustion engine by delivering an air/fuel mixture to the combustion chamber in a pure gaseous state. The system accepts an air/fuel mixture from a carburetor or injector which is placed into a vaporized state before entering an expansion chamber and then the combustion chamber of the engine. An intake track capable of withstanding exhaust gas temperatures of an internal combustion engine is constructed and arranged to cause vaporization of fuel and inhibit the vaporization from condensing.

Abstract: Embodiments of mechanisms for processing a semiconductor wafer are provided. A method for processing a wafer includes providing a wafer process apparatus. The wafer process apparatus includes a chamber and a stage positioned in the chamber for supporting the semiconductor wafer. The method also includes supplying a process gas to the semiconductor wafer via a discharging assembly that is adjacent to the stage. The discharging assembly includes a discharging passage configured without a vertical flow path section.

Abstract: A noise muffler for an air moving device can include a housing with a housing inlet, a housing outlet, and at least a first foam component and a second foam component. The first foam component and the second foam component are placed within a cavity of the housing and define an air passageway. The first foam component and the second foam component redirect air flow through the cavity in three dimensions in order to muffle noise generated by the air moving device.

Abstract: A scroll-type fluid machine includes a fixed scroll, an orbiting scroll, a drive shaft, a cooling fan, and a cooling air duct. In a bent portion, immediately adjacent to the cooling fan, where a direction of the cooling air duct is changed from a direction perpendicular to the drive shaft to a direction of the drive shaft, a part of an outer peripheral wall which is distant from the drive shaft is planar and defines a plane which intersects a plane perpendicular to the drive shaft at an obtuse angle. With this configuration, a main stream of the cooling air is prevented from separating from an inner peripheral wall of the bent portion.

Abstract: A baffle is provided herein. The baffle includes a cylindrical baffle section. The cylindrical baffle section includes one or more holes. The baffle also includes a split line retaining section. The split line retaining section includes one or more mounting bosses. Each of the one or more mounting bosses receives one or more mounting bolts.

Abstract: The present invention relates to a vehicle silencer comprising: a first case provided in a vehicle; a second case coupled to the first case; a resonant chamber positioned between the first case and the second case; and a passing hole formed by penetrating the second case, such that the inside of the second case and the resonant chamber communicate with each other therethrough, wherein the second case includes a first passing member formed such that the thickness thereof gradually decreases toward a first direction.

Abstract: Compressors and methods for operating compressors are provided. In one example, a compressor is provided that comprises a ported shroud including a first port positioned upstream of a leading side of a rotor and a second port positioned downstream of the leading side of the rotor. The compressor also includes a muffler arranged in the ported shroud and comprising a plurality of projections, each of the plurality of projections radially extend from a base of the muffler and include an aperture extending through the base.

Abstract: The present disclosure provides a premixer for at least two gases, comprising: a tubular body having a closed end and an opposite, open end; a first flow passage for receiving a first gas, the first flow passage axially extending through the closed end into the tubular body in a sealable manner; a conical tube arranged in the tubular body, wherein a small end of the conical tube communicates with the first flow passage, and a large end of the conical tube extends toward the open end with an edge thereof being fixed to an inner wall of the tubular body, thereby defining a sealed distribution chamber between the tubular body and the conical tube; and a second flow passage arranged on a side portion of the tubular body for receiving a second gas, wherein the second flow passage communicates with the distribution chamber, so that the second gas can be introduced into said conical tube via the distribution chamber in a substantially radial manner.

Abstract: A silencer includes conduit with a downstream end portion configured from a tubular member which includes a conduit discharge port extending through a silencer main body and discharges exhaust gas to the outside therethrough. The tubular member includes a resonance communication hole communicating with a resonance chamber and an upstream side communication hole and a downstream side communication hole communicating with a second chamber. A barrier wall serving as a throttle portion for throttling an exhaust path at an intermediate location of the tubular member is provided in the inside of the tubular member and between the upstream side communication hole and the downstream side communication hole.

Abstract: A modular silencer for use on a compressor or blower mounted on a vehicle. The compressor has an intake port and an exhaust port, and the silencer has an inlet port in communication with the exhaust port of the compressor. The silencer includes a silencer housing and a resonator assembly removably positioned inside the housing. In one embodiment, the compressor includes a compressor housing and a power input shaft protruding from the compressor housing adjacent the air exhaust port. The silencer housing preferably includes a concave portion that at least partially receives the power input shaft. The silencer housing can also include a groove on the inner surface, and the resonator assembly can be at least partially positioned in the groove. Preferably, the resonator assembly includes a resonator plate, a plurality of resonator pipes extending through the plate, and a reinforcing flange coupled between at least two of the resonator pipes.

Abstract: In a muffler comprising a shell formed by joining a pair of shell halves each including a bottom wall and a side wall and defining an opening opposite to the bottom wall, the shell halves being joined to each other at the openings thereof, the muffler further comprising an inlet pipe for introducing exhaust gas into the shell and an outlet pipe for expelling exhaust gas from inside the shell, a depth of one of the shell halves is greater than a depth of the other shell half, and the inlet pipe and the outlet pipe are connected to the side wall of the one shell half so that the overall plane stiffness of the shell is well balanced and maximized. Therefore, without adding any reinforcement or increasing the wall thickness of the shell, the acoustic emission from the muffler can be minimized.

Abstract: Different inner diameter internal or external pressure drop tubes or orifice plate openings producing different discharge pressure pulse amplitudes are employed in a pump pulsation control reactive discharge dampener. Either both pressure drop tubes/orifice plates may be mounted concurrently on or in the dampener, connected to different discharge pipes used selectively by the operator depending upon the piston or plunger size being employed, or the pressure drop tubes/orifice plates may be interchangeable.

Abstract: A sound attenuator on the intake side of a compressor of an exhaust-gas turbocharger includes a tubular sound attenuator housing, which encases a flow duct between a face-side inlet opening and a rear-side outlet opening. A holding plate is provided in the sound attenuator housing in the flow direction and is perforated in the flow direction. For example, the holding plate can have a multiplicity of holes extending in the flow direction. The sound attenuator on the intake side of the compressor of an exhaust-gas turbocharger has a compact, lightweight and inexpensive structural form. The intake air is subjected to low resistance as it flows through the attenuation elements.

Abstract: A diffuser for a vehicle exhaust system includes a body defined by a tubular portion comprising an outer peripheral wall extending about a central axis and at least one surface that extends at an angle relative to the central axis. A tailpipe connection interface is formed at one end of the tubular portion. In one example, the surface extends at an oblique angle relative to the central axis. In another example, a first plurality of holes is formed within the outer peripheral wall and a second plurality of holes is formed within the surface.

Abstract: A silencer (1) for an exhaust gas installation of an internal combustion engine, particularly of a motor vehicle includes a housing (2), with a circumferential shell (3) closed in the peripheral direction (5) and an end base (6) at each of two longitudinal ends, spaced apart in an axial direction (4). A silencer insert (15) is arranged in the housing (2) and has an inlet pipe (8) for exhaust gas and an outlet pipe (10) for exhaust gas. The shell (3) has, in the peripheral direction (5) has at least one inlet shell-segment (11) and one outlet shell-segment (12). The inlet shell-segment has at least one inlet opening (7), into which such an inlet pipe (8) is inserted from the inside. The outlet shell-segment (12) has at least one outlet opening (9) into which such an outlet pipe (10) is inserted from the inside.

Abstract: A silencing apparatus for a vehicle includes: a muffler (1; 20; 30; 40) having a flattened sectional shape; an inlet pipe (7; 26; 36; 46); an outlet pipe (8; 27; 37; 47); and at least one partition plate (2, 3; 21, 22; 31, 32; 41, 42) that divides the inside of the muffler (1; 20; 30; 40) into a plurality of sound-deadening chambers. Each of the at least one partition plate (2, 3; 21, 22; 31, 32; 41, 42) has at least one communication hole. Within the muffler (1; 20; 30; 40), at least one among an opening of the inlet pipe (7; 26; 36; 46), an opening of the outlet pipe (8; 27; 37; 47), and the at least one communication hole is disposed at a position that is apart by a length equal to a half of the width of the muffler (1; 20; 30; 40) from one end of the muffler (1; 20; 30; 40) in the width direction thereof, and at least one among them is disposed at a position that is apart by a length equal to a quarter of the width from one end of the muffler (1; 20; 30; 40) in the width direction.

Abstract: A muffler includes a shell, baffles, and a plurality of pipes. The shell defines first and second end cavities and a central cavity. The end cavities have larger cross-sectional areas that a cross-sectional area of the central cavity. The baffles cooperate to form multiple chambers within the shell. A first inlet directs a first portion of the exhaust into a first chamber. A second inlet directs a second portion of the exhaust into a second chamber. A first pipe extends through first, third and fourth baffles and includes an inlet in the fourth chamber. The first pipe directs exhaust from the fourth chamber to a first outlet at the first end cavity. A second pipe extends through the second, third and fourth baffles and includes an inlet in the third chamber. The second pipe directs exhaust from the third chamber to a second outlet at the second end cavity.

Abstract: A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of discrete interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows.

Abstract: A muffler for a vehicle is provided, including: a muffler housing having a first housing body and a second housing body that are divided in two parts and form an internal space with an inlet opening and an outlet opening when combined; and an internal structure inserted and forced into the internal space of the muffler housing to be detachable from the muffler housing, and allowing an exhaust gas discharged from an engine to flow into the internal space and to be discharged out of the muffler housing through a predetermined path.

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.

Abstract: A muffler (1) for an exhaust system of an internal combustion engine, especially of a motor vehicle, has a housing (2), which encloses a muffler volume (7) and has at least one flat wall area (6), with at least one inlet tube (3) and with at least one outlet tube (4) and with at least one bracket (5) for fastening the muffler (1) to a holding structure. A lightweight construction is simplified if at least one wall section (11) of such a flat wall area (6) is formed by a flat lightweight panel (12) with sandwich structure.

Abstract: A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of discrete interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows.

Abstract: A muffler for a vehicle is provided, including: a muffler housing having a first housing body and a second housing body that are divided in two parts and form an internal space with an inlet opening and an outlet opening when combined; and an internal structure inserted and forced into the internal space of the muffler housing to be detachable from the muffler housing, and allowing an exhaust gas discharged from an engine to flow into the internal space and to be discharged out of the muffler housing through a predetermined path.

Abstract: The present invention relates to an exhaust gas treatment device for an exhaust system of an internal combustion engine, more preferably of a road vehicle with a housing, in which at least one exhaust gas treatment element is arranged and mounted by means of a bearing mat and with an outlet pipe which is fluidically connected to an outlet chamber formed in the housing. The risk of a contamination of the bearing mat with water can be reduced with a separating bottom which is arranged in the housing and separates the outlet chamber from a collecting chamber. The separating bottom includes several passage openings through which the outlet chamber is fluidically connected to the collecting chamber and which are each enclosed by a collar protruding into the outlet chamber.

Abstract: A horizontally installed muffler may include a housing, first and second tail pipes installed to front and rear ends of the housing through the housing, an introduction chamber formed inside the housing and to which an outlet of the exhaust pipe is connected, a first intermediate pipe fluid-connected to the introduction chamber and having a first discharge hole, a discharge chamber fluid-connected to the introduction chamber through the first discharge hole of the first intermediate pipe, wherein each end of the first and second tail pipes and the first discharge hole are disposed inside the discharge chamber, first and second resonance chambers formed inside the housing, a second intermediate pipe fluid-connected to the first and second resonance chambers through the discharge chamber and the introduction chamber and having an introduction hole disposed inside the introduction chamber and a second discharge hole disposed inside the discharge chamber.

Abstract: A noise reduction device 40, for example for use in a bleed assembly 30 of a gas turbine engine, comprises partitions 50, 52 forming cells 54 having apertures 56, 58, 60 which provide contractions and sudden expansions of flow passing through the device. The apertures 56, 58, 60 are disposed relative to each other so as to force the flow to change direction within the cells 54 to break up jets of gas issuing from the apertures 56, 58, 60. Webs 62, 64, 66 may be provided adjacent the apertures 56, 58, 60 to direct flow and to assist in generating turbulence.

Abstract: A silencing apparatus for a vehicle includes: a muffler (1; 20; 30; 40) having a flattened sectional shape; an inlet pipe (7; 26; 36; 46); an outlet pipe (8; 27; 37; 47); and at least one partition plate (2, 3; 21, 22; 31, 32; 41, 42) that divides the inside of the muffler (1; 20; 30; 40) into a plurality of sound-deadening chambers. Each of the at least one partition plate (2, 3; 21, 22; 31, 32; 41, 42) has at least one communication hole. Within the muffler (1; 20; 30; 40), at least one among an opening of the inlet pipe (7; 26; 36; 46), an opening of the outlet pipe (8; 27; 37; 47), and the at least one communication hole is disposed at a position that is apart by a length equal to a half of the width of the muffler (1; 20; 30; 40) from one end of the muffler (1; 20; 30; 40) in the width direction thereof, and at least one among them is disposed at a position that is apart by a length equal to a quarter of the width from one end of the muffler (1; 20; 30; 40) in the width direction.

Abstract: A muffler comprising an inner pipe having one end connected to an upstream side of an exhaust pipe of an engine exhaust system, and another end connected to a downstream side of the exhaust pipe, an outer pipe covering at least part of the inner pipe, a hole being formed in a pipe wall of the inner pipe, a resonance chamber formed in a space between the inner pipe and the outer pipe, and a connection passage formed on an outer peripheral surface of the inner pipe along an axial direction of the inner pipe. The connection passage comprising a plurality of sections connected in series to form the connection passage as a single continuous passage.

Abstract: A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of discrete interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows.

Abstract: A muffler apparatus for a vehicle may include a muffler housing that has first and fourth chambers formed at front and rear portions therein and second and third chambers formed between the first and fourth chambers in sequence, an exhaust gas intake pipe that may be inserted in the muffler housing through the front portion of the muffler housing, with an end portion thereof being disposed in the third chamber, and exhaust gas discharge pipes that may be connected with the second chamber and discharge an exhaust gas to the outside of the muffler housing.

Abstract: A muffler apparatus for a vehicle may include a muffler housing that has first and fourth chambers formed at front and rear portions therein and second and third chambers formed between the first and fourth chambers in sequence, an exhaust gas intake pipe that may be inserted in the muffler housing through the front portion of the muffler housing, with an end portion thereof being disposed in the third chamber, and exhaust gas discharge pipes that may be connected with the second chamber and discharge an exhaust gas to the outside of the muffler housing.

Abstract: A horizontally installed muffler may include a housing, first and second tail pipes installed to front and rear ends of the housing through the housing, an introduction chamber formed inside the housing and to which an outlet of the exhaust pipe is connected, a first intermediate pipe fluid-connected to the introduction chamber and having a first discharge hole, a discharge chamber fluid-connected to the introduction chamber through the first discharge hole of the first intermediate pipe, wherein each end of the first and second tail pipes and the first discharge hole are disposed inside the discharge chamber, first and second resonance chambers formed inside the housing, a second intermediate pipe fluid-connected to the first and second resonance chambers through the discharge chamber and the introduction chamber and having an introduction hole disposed inside the introduction chamber and a second discharge hole disposed inside the discharge chamber.

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 exhaust muffler for an internal combustion engine, the exhaust muffler including a housing having a first end plate and a second end plate. The second end plate is disposed opposite to the first end plate. The exhaust muffler also includes an inlet pipe connected to the first end plate and an outlet pipe connected to the second end plate of the housing. A plurality of passages are disposed within the housing along a longitudinal axis of the housing, the plurality of passages have different lengths.

Abstract: A muffler (1) for an exhaust system (2) of an internal combustion engine, especially of a motor vehicle, with a muffler housing (3), which encloses a housing interior space (5), and with at least one exhaust gas-carrying hollow body (4) with two half shells in a half shell construction. The hollow body is arranged in the housing interior space (5). The two half shells (14, 15) of the hollow body (4) are fastened to one another in the area of a separating plane (16). The assembly of the muffler (1) or of the hollow body (4) can be simplified if the two half shells (14, 15) are fastened to one another by fastening elements (17, 18), which are formed directly on the half shells (14, 15).

Abstract: A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows.

Abstract: A silencer for a gas turbine includes a first duct portion; a second duct portion connected to the first duct portion, the first and second duct portions forming an elbow region at the connection; and a plurality of elbow shaped vanes provided in the elbow region. The plurality of elbow shaped vanes have equal lengths and are spaced equally apart.

Abstract: The invention relates to an exhaust gas after-treatment device for an internal combustion engine, including a housing into which an exhaust pipe that opens into a mixing chamber penetrates. The mixing chamber is shaped as a pot and reverses a direction of flow of the incoming exhaust gas whereby it returns the exhaust gas radially outside of the exhaust pipe. An open end of the pot-shaped mixing chamber opens into a collecting space which is designed so that it supplies the exhaust gas to at least one downstream SCR catalytic converter.

Abstract: An exhaust component is provided including an inlet portion for accepting an exhaust stream entering therein from an exhaust system, two or more separator components fixed to the inlet portion for separating the exhaust stream into two or more streams at the point of egress from the inlet portion, two or more chambers fixed to the separator components, the chambers for muffling sound of the exhaust stream, two or more collector components fixed to the chambers opposite the separator components for collecting the separated exhaust streams upon egress from the chambers, and one or more outlet portions fixed to the collector components at the end opposite the chambers for carrying separated or merged exhaust streams out of the exhaust component.

Abstract: This silencer (10) for a motor vehicle exhaust line of the type comprising: a casing (12) internally delimiting an exhaust volume; an exhaust gas inlet (16) opening into the exhaust volume; and an exhaust gas outlet pipe (18) communicating with the exhaust volume and having an outlet orifice (30) to the outside of the silencer (10), is characterized in that the outlet pipe (18) comprises a section (32) pressed against the casing (12), the casing (12) having at least one perforation placing the pressed section (32) in communication with the exhaust volume.

Abstract: In a muffler which includes an outer tube which configures an outer wall, an inner tube provided in the outer tube and having punching holes formed therein, and a sound absorbing material filled between the outer tube and the inner tube, and which is attached to an exhaust pipe for exhausting exhaust gas from an engine, the number of punching holes at portions of the inner tube which have a great length to the outer tube is set greater than the number of punching holes at portions of the inner tube which have a small length to the outer tube in comparison with the portions having the great length.

Abstract: A muffler for attenuating acoustic noise in a gas flow that includes a casing having a substantially-rectangular cross-section with an inlet opening in an inlet end and an outlet opening in an outlet end, so that a gas flow containing acoustic noise passes from the inlet opening to the outlet opening. The muffler also includes a V-shaped sound diffuser disposed within the casing and spanning the distance between opposing top and bottom walls of the casing. The sound diffuser comprises a pair of elongate leg plates having base ends attached to the outlet end on opposite sides of the outlet opening, and tip ends merged into an apex that is aligned with the inlet opening. Each leg plate has a plurality of apertures formed therein, and the apex splits the inlet gas flow into two side flows, with each side flow passing through the plurality of apertures in one of the leg plates to reach the outlet opening.

Abstract: A multi-stage low pressure drop muffler for a compressor including a first plate having a hole, a tube attached to the first plate, a plurality of holes disposed around the circumference of the tube, a plurality of tubes extending through a second plate, and an internal ring disposed on the second plate between the center of the second plate and the plurality of tubes. The muffler is designed to muffle a wide range of frequencies, minimize pressure reduction, improve fluid flow, and improve compressor efficiency.

Abstract: Methods, systems, and apparatuses for exhaust silencers for engines, such as microturbines, are described. An exhaust silencer reduces noise produced by an engine. While passing through an exhaust silencer, an exhaust stream from the engine makes one or more turns, thereby reducing turbine noise. An exhaust silencer includes a body, a cavity in the body, a baffle plate that partially divides the central cavity, an inlet port formed in a first surface of the body, and an outlet port formed in a second surface of the body. The inlet port is configured to receive an exhaust stream that flows through the cavity, around the baffle plate. The outlet port is configured to discharge the exhaust stream from the body.

Abstract: This Invention relates to a kind of devices with no emission resulted for treatment of exhaust gas. The Device comprises a vessel having openings that serve only as inlet. At least two exchange sections are provided inside the vessel after inlet of exhaust gas. There is a gas chamber at each connection part between two sequential sections. The gas exchange chamber at the first gas exchange section has a through opening leading to outside atmosphere area, and at each one from the second to the last exchange section, there is a feedback pipe to connect to the inlet of the first stage of exchange section. With this configuration, on entering into the exchange section, exhaust gas will be ejected inwards and causes very strong entrainment, which makes the gas chamber become vacuum and sucks air with oxygen from atmosphere into gas chamber via the through opening to atmosphere.

Abstract: An exhaust-noise attenuation muffler includes two half-shells, each including an inner shell and an outer shell which are made through deep drawing of a sheet metal blank which can have a thickness between 0.3 mm and 0.5 m. The inner shell or the outer shell is provided with an embossment. After placing the inner shells in corresponding ones of the outer shells to form half-shells, two complementing half-shells are joined together.

Abstract: An exhaust component is provided including an inlet portion for accepting an exhaust stream entering therein from an exhaust system, two or more separator components fixed to the inlet portion for separating the exhaust stream into two or more streams at the point of egress from the inlet portion, two or more chambers fixed to the separator components, the chambers for muffling sound of the exhaust stream, two or more collector components fixed to the chambers opposite the separator components for collecting the separated exhaust streams upon egress from the chambers, and one or more outlet portions fixed to the collector components at the end opposite the chambers for carrying separated or merged exhaust streams out of the exhaust component.

Abstract: A muffler unit for a general-purpose engine includes a muffler (40) having a maze of sound-deadening chambers (101, 102, 103) defined therein and an inlet pipe (85) disposed inside the muffler. The inlet pipe has an open end (106) connected to an exhaust port of the engine via an exhaust pipe (43), a closed end (107) opposite to the open end, and perforations (108) provided near the open end and connecting an internal space of the inlet pipe and a first sound-deadening chamber (101). The closed end of the inlet pipe is exposed to the outside air, so that exhaust gasses are cooled when the gasses impinge on the closed end of the inlet pipe.

Abstract: One embodiment of the invention includes a product including a fuel-cell exhaust diffuser; an air funnel; and at least two exhaust tubes attached to the diffuser.