Abstract: A muffler for use with an engine is provided. The muffler includes a first tube defining a first inlet and a first outlet spaced apart from the first inlet. The first tube is configured to receive exhaust at the first inlet. The muffler includes a second tube spaced apart from the first tube. The second tube defines a second inlet and a second outlet spaced apart from the second inlet. The second tube is configured to receive exhaust at the second inlet. The muffler includes a third tube disposed at least partly around the second tube. The third tube defines a third outlet spaced apart from each of the second inlet and the second outlet. The third outlet is in fluid communication with the second outlet of the second tube. The muffler also includes at least one outlet tube in fluid communication with the first outlet and the third outlet.

Abstract: A muffler system with a muffler in one aspect of the present disclosure includes an outer wall, and a first separator and a second separator that partition a muffling space. An attachment member is arranged on an outer surface of the outer wall, and a muffler pipe to communicate with the muffling space is arranged to pass through an attachment member hole in the attachment member. The outer surface of the outer wall includes a first area and a second area. The first area is located between a first end of the muffling space and the first separator, and the second area is located between a second end of the muffling space and the second separator. The attachment member is welded to the first and second areas of the outer surface of the outer wall.

Abstract: The disclosed inventive concept provides a further achievement in efforts to produce a tunable exhaust sound for a vehicle. The system provides a tunable exhaust system including a tunable resonator and a pair of tunable mufflers. The tunable resonator includes a housing including first, second and third expansion chambers. A pair of bank-by-bank exhaust conduits extends through the housing. At least one of the conduits includes a band of peripheral perforations within the first expansion chamber. The band is formed at an angle relative to the long axis of the conduit on which it is formed. The mufflers include inlet and outlet pipes. At least one of the outlet pipes includes a variable exhaust gas flow assembly. The variable exhaust gas flow assembly includes a vane shaft, an exhaust gas regulating vane attached to the vane shaft, and a vane actuator for regulating the position of the vane shaft.

Abstract: A scrubber system for cleaning exhaust gas from different engines. The scrubber system includes a scrubber, such as a wet scrubber, for removing a constituent from the gas and a housing having an inlet for receiving the gases into the scrubber and an outlet for discharging cleaned gas. An exhaust mixer has plural inlets for receiving exhaust gas from the different engines and an outlet for discharging the gases into the scrubber through the inlet. The exhaust mixer mixes the exhaust gases into a combined flow stream exiting the exhaust mixer outlet. The scrubber system can clean exhaust gases from different engines by connecting exhaust pipes from each engine to a respective inlet, mixing the exhaust gases in the mixer, and directing the mixed gases into the scrubber, which cleans and discharges the cleaned, mixed gases. The scrubber system can be provided to a marine vessel.

Abstract: An exhaust gas sensor mounting structure includes: an exhaust pipe attached to a vehicle engine; a catalyst unit which cleans exhaust gas of the engine; a silencer connected to a downstream portion of the exhaust pipe; and an exhaust gas sensor which detects a prescribed component of the exhaust gas; at least part of the catalyst unit is located in the silencer; at least part of a pipe that is connected to a downstream end portion of the catalyst unit extends alongside an outer surface of the silencer; and the exhaust gas sensor is attached so as to penetrate through an outer wall of the silencer and a wall of the pipe.

Abstract: An engine system for a working machine includes an engine disposed in a main body of the working machine, an exhaust manifold coupled to the engine, a tail pipe, an exhaust-gas purification device disposed in the main body and including an exhaust-gas inlet-side housing. The exhaust-gas inlet-side housing includes an exhaust-gas inlet coupled to the exhaust manifold, and an exhaust-gas outlet-side housing including an exhaust-gas outlet coupled to the tail pipe. The exhaust-gas purification device is configured to purify exhaust gas discharged from the engine and to cause the purified exhaust gas to be discharged from the tail pipe to an outside of the engine system. The engine system is configured such that a silencer housing is disposable in the exhaust-gas inlet-side housing, the exhaust-gas outlet-side housing, or both, to attenuate exhaust sound of the engine.

Abstract: An exhaust system for the engine includes two exhaust pipes for discharging therethrough exhaust gases from the engine, a muffler for silencing the exhaust gases, an introducing pipe for introducing the exhaust gases into the muffler and a collecting duct for merging the exhaust gases from the two exhaust pipes together and then to introduce them into the introducing pipe. The collecting duct has a single outlet opening within an interior of the introducing pipe, which single outlet opening has a first passage area that is chosen to be smaller than the sum of respective second passage areas of discharge openings of the exhaust pipes and also to be smaller than a third passage area of the introducing pipe.

Abstract: An exhaust gas system is provided for an internal combustion engine having at least a first and a second cylinder. A first exhaust gas pipe is associated with the first cylinder and a second exhaust gas pipe is associated with the second cylinder. A first muffler is associated with the first exhaust gas pipe and a second muffler is associated with the second exhaust gas pipe. A first muffling pipe branches off from the first exhaust gas pipe upstream of a first shut-off element, and is fed through the first muffler and leads into the second exhaust gas pipe downstream of a second shut-off element. A second muffling pipe branches off from the second exhaust gas pipe upstream of the second shut-off element, and is fed through the second muffler and leads into the first exhaust gas pipe downstream of the first shut-off element.

Abstract: An exhaust muffler to be attached to an engine body includes a casing that includes: a rear member facing the engine body and a front member opposing to the rear member while maintaining a gap between the front member and the rear member, the gap forming a path in which exhaust gas discharged from the engine body flows; at least one guiding member that is disposed in the gap of the casing, extends from the rear member to the front member, and has a through-hole into which a fastening member that fastens the casing to the engine body is inserted; and a catalyst holding member that holds a catalyst that purifies the exhaust gas and is accommodated in the gap of the casing while being supported by the at least one guiding member.

Abstract: An exhaust system for an internal combustion engine, configured to enhance a silencing effect while being miniaturized. The exhaust system includes a muffler body configured in such a manner that a first expansion chamber and a second expansion chamber separated from each other are partitioned therein. A plurality of exhaust pipes extend from an internal combustion engine and are connected to the first expansion chamber. A communication pipe is configured to be connected to the first expansion chamber and the second expansion chamber, to merge exhaust gas from the plurality of exhaust pipes, and to introduce the merged exhaust gas into the second expansion chamber.

Abstract: A muffler (1) for an exhaust system of a motor vehicle internal combustion engine has a housing (2), with an exhaust gas inlet (4) and an exhaust gas outlet (5), including a circumferentially extending jacket (16) and end panels (14, 15) each axial ends. A chamber (18) in the housing interior (3), through which exhaust gas flows during operation, is axially limited by intermediate panels (20, 21) at axial ends. The thermal load on the jacket (16) is reduced with an insulating shell (29), arranged in the housing interior, extending in the circumferential direction (17) along the jacket (16). The two intermediate panels (20, 21) are supported on the insulating shell (29), each with an outer panel edge (30, 31). The insulating shell (29) is supported radially on the jacket (16) with a shell edge (33). An insulating gap (35) is formed radially between the jacket and the insulating shell.

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: The invention relates to a method for damping thermo-acoustic oscillations via a resonator having a resonator volume with thermo-acoustic oscillations induced in a cavity inclined to thermo-acoustic oscillations, and at least some of the thermo-acoustic oscillations being output from the cavity and being input into the resonator volume, with damping oscillations produced in the resonator volume, which are matched to the thermo-acoustic oscillations, with at least some of the damping oscillations being input into the cavity such that the damping oscillations and the thermo-acoustic oscillations overlap in an overlap area, and the oscillations being largely cancelled out. The invention relates to an apparatus for damping thermo-acoustic oscillations in a cavity, comprising a resonator with a resonator volume and a cavity. The invention also relates to a combustion chamber together with a method and an apparatus according to the invention, and to a gas turbine having a combustion chamber.

Abstract: A performance-enhancing crossover muffler for internal combustion engines includes an enclosed case having an inside, and two inlet pipes located inside the case having respective inlet ends extending through a frontside of the case for connection with two outside engine exhaust manifolds, and respective interior ends which merge together to define a merge entry. The muffler also includes one or more outlet pipes located inside the case with outlet end extending through a backside of the case for connection with an outside tailpipe, an interior end defining a merge exit, and one or more apertures in the outlet pipe communicating with the inside of the case. The muffler further includes a piping merge zone between the merge entry and the merge exit for commingling exhaust flows from the two engine exhaust manifolds. The two inlet pipes and the piping merge zone are without communication with the inside of the case.

Abstract: Embodiments in accordance with the present disclosure may provide a conformal transverse muffler including an enclosure shaped to fit around a bottom and a side of a feature of a vehicle. The enclosure may include a mid section fittable below the feature, and two side sections fittable in opposite locations only radially outside of a circumference of the spare tire well. The side sections may be thicker than the mid section and may have a vertical center above a vertical center of the mid section.

Abstract: An exhaust system includes an exhaust pipe. The exhaust pipe includes an outer pipe and an inner pipe. A first through-hole and a second through-hole are provided in a peripheral surface of the outer pipe and a peripheral surface of the inner pipe, respectively, to receive an exhaust gas detector. Third through-holes are provided in the peripheral surface of the outer pipe, at a different position than that of the first through-hole. Since the third through-holes are provided in the outer pipe, a liquid can be drained promptly from a space between the outer pipe and inner pipe. Exhaust gas can be prevented from being discharged to the atmosphere by sealing the third through-holes.

Abstract: A sound attenuating heat exchanger for an internal combustion engine includes a housing, a barrier wall and a fin. The housing includes an exhaust inlet, an exhaust outlet, a coolant inlet and a coolant outlet. The exhaust inlet is connected to the exhaust outlet by an exhaust flow passage. The coolant inlet is connected to the coolant outlet by a coolant flow passage. The barrier wall fluidly separates the exhaust flow passage from the coolant flow passage. The fin extends from the barrier wall into the exhaust flow passage, and includes a resonator adapted to attenuate sound waves traveling through exhaust gas within the exhaust flow passage. The barrier wall and the fins are adapted to exchange heat energy between the exhaust gas flowing through the exhaust flow passage and coolant flowing through the coolant flow passage.

Abstract: An air-cooled general-purpose engine includes: a cooling fan fixed to one end portion, protruding outward from one end wall of an engine main body, of a crankshaft; and a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan. The air-cooled general-purpose engine includes: an oil pump which pumps up an oil from an oil reservoir; and an oil-supply path which is formed in the one end wall, facing the cooling-air path, of the engine main body, and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, and a jet for jetting the oil is provided in an opening of the oil-supply path, the opening being open to the valve operating chamber.

Abstract: One or more methods for generating electricity using waste heat are provided herein. The method can include providing an exhaust gas to a first silencing chamber within an inner housing of a heat recovery silencer, flowing the exhaust gas from the first silencing chamber to a second silencing chamber within the inner housing, flowing the exhaust gas from the second silencing chamber to a third silencing chamber within the inner housing and imparting a spiral flow path to the exhaust gas as the exhaust gas enters the third silencing chamber.

Abstract: In a exhaust device for an vehicle internal combustion engine, an exhaust pipe (20) of an engine (11) branches at a branching point (B) into a downstream-side first branch pipe (32) and a downstream-side second branch pipe (33). A first silencer (36) is attached to the first branch pipe (32), and a second silencer (37) is attached to the second branch pipe (33). The first branch pipe (32) and the second branch pipe (33) are different in at least one of bending rigidity and mass so that when the first branch pipe (32) and the second branch pipe (33) are vibrated in a specific vibration frequency range, vibrations of the two branch pipes (32, 33) cancel out each other at the branching point (B).

Abstract: An exhaust system for an internal combustion engine, having a first exhaust tract assigned to a first group of cylinders of the internal combustion engine, and having a second exhaust tract assigned to a second group of cylinders of the internal combustion engine, each exhaust tract comprising an exhaust gas purification device, a first silencer arranged on the outlet side of the respective exhaust gas purification device, and a second silencer arranged on the outlet side of the respective first silencer. Each exhaust tract includes a bypass line, it being possible for exhaust gas to be diverted via each bypass line, starting from the respective first silencer, bypassing the second silencers, and the bypass lines and hence the first silencers of both exhaust tracts being connected to one another by a mixing line.

Abstract: A muffler having an inlet and an outlet, through which exhaust gas flows; a tubular main body; a heat exchanger inside the main body; a noise-deadening first conduit, which extends at least partly inside the main body, from a fork region located directly downstream from the inlet, to a converging region directly upstream from the outlet; a second conduit, which extends through the heat exchanger and at least partly inside the main body, from the fork region to the converging region and parallel to the first conduit; and a regulating valve located outside the main body, to selectively direct exhaust gas flow along the first conduit or the second conduit.

Abstract: An aftertreatment module for use with an engine is disclosed. The aftertreatment module may have a first chamber with an inlet, and at least one catalyst substrate disposed in the first chamber in a flow path through the inlet and having a flow direction from an inlet face to an outlet face in general alignment with the flow path. The aftertreatment module may also have a second chamber with at least one outlet in general alignment with the flow direction through the inlet. The aftertreatment module may further have at least one noise attenuation passage fluidly connecting the first chamber with the second chamber. The at least one noise attenuation passage may be oriented generally orthogonal to the inlet and the at least one outlet and be located between the inlet and the outlet face of the at least one catalyst substrate.

Abstract: A resonator for a dual-flow exhaust system of an engine is provided. The resonator includes a housing defining an enclosure and a baffle spanning the housing and separating a first and second expansion chamber of the enclosure, the baffle including at least one opening. The resonator further includes a first and a second exhaust conduit extending through the baffle and housing, each conduit in fluidic communication with a separate cylinder bank and including a perforated portion fluidly coupled to the enclosure, each perforated portion positioned in separate expansion chambers.

Abstract: A Y-pipe splitter for use on race cars, such as stock cars which race on oval tracks and sports cars which race on road course tracks, mounts to the lower frame or chassis of the car, and routes exhaust gasses from a Y-pipe assembly to a pair of tail pipes extending to the side of the car while providing improved ground clearance. The Y-pipe splitter includes first and second splitter tail pipe sections of a generally flattened oval cross-section with a longitudinally beveled inlet portions connectable to an outlet of the Y-pipe assembly and an outlet portion connectable to one of the tail pipes. The beveled inlet portions of the splitter tail pipe sections are affixed together along a respective edge of each thereof so as to merge together with respective centerlines thereof at an oblique angle to a single inlet opening which is connectable to the outlet opening of the Y-pipe assembly by affixing thereto.

Abstract: An exhaust-pipe structure for a saddle-ride type vehicle includes expansion paths each having a capacity appropriate for the output capacity of a corresponding cylinder. A front exhaust pipe and a rear exhaust pipe extend from a front cylinder and a rear cylinder constituting a V-type engine, respectively. A silencer is connected to rear end portions of the front and rear exhaust pipes. As expansion chambers, the silencer is provided with a lower first chamber led from the front cylinder and an upper first chamber led from the rear cylinder. A protruding space protruding from the lower first chamber is formed so that the capacity of the lower first chamber led from the front cylinder is larger than the capacity of the upper first chamber led from the rear cylinder.

Abstract: A silencer for an internal combustion engine includes a silencer housing formed by a pair of clamped housing members each having a substantially identical configuration relative to one another. The silencer housing has an intake port formed at a first end and an exhaust port formed at a second, opposite end. At least one separator is received in the silencer housing between and spaced apart from the first end and the second end. The at least one separator extends transversely across the silencer housing relative to a longitudinal length of the silencer housing.

Abstract: A customizable integrated modular exhaust system is provided having a hollow shell muffler body formed from two symmetrical stamp formed shell members that sealably attach to a tailpipe that transverses the hollow shell, and extends through each end of the hollow shell. Exhaust gases are delivered to the muffler body from an engine, by at least one inlet tube communicably attached to the muffler body and connected to the engine via a flange. The muffler body may have various internal configurations, including a disc baffle or catalytic converter configuration.

Abstract: The invention relates to a sound absorber for an exhaust system having a Y-shaped feed piece arranged upstream from the sound absorber, combining two exhaust gas-carrying lines to form a single line entering into the sound absorber whereby the Y-shaped feed piece and the sound absorber are assembled from a common bottom shell and a common top shell. The invention also relates to an exhaust system equipped with the sound absorber.

Abstract: A variable muffler corresponds to a muffler of an internal combustion engine including a variable valve that controls the flow of exhaust gas. The variable muffler includes a muffler body forming a muffler chamber, an inlet pipe with an opening at the muffler chamber to direct the flow of exhaust gas from the opening towards the muffler chamber, and a muffler-in pipe arranged in the muffler chamber. The muffler-in pipe includes an opening facing the opening at the muffler chamber, and into which the exhaust gas output from the opening flows in a predetermined direction. The muffler-in pipe further includes a slope inclining vertically downwards towards the opening, and extending in a direction different from the predetermined direction. By such a configuration, a muffler of an internal combustion engine having proper driving of the valve ensured can be provided.

Abstract: An exhaust muffler is provided for a turbine engine with at least first and second exhaust outlets. The exhaust muffler includes a first arm configured to be coupled to the first exhaust outlet of the turbine engine. The first arm includes an outer surface, and an inner surface that defines a first exhaust cavity. The first arm further includes a plurality of perforations extending between the inner and outer surfaces. The exhaust muffler further includes a second arm coupled to the first arm and configured to be coupled to the second exhaust outlet of the turbine engine. The second arm includes an outer surface, and an inner surface that defines a second exhaust cavity. The second arm also includes a plurality of perforations extending between the inner and outer surfaces.

Abstract: A muffler includes a case divided into three chambers by two baffles. The first chamber is closest to, and the third chamber is farthest from, the exhaust pipe. An inlet pipe has a first end connected to the exhaust pipe, and a second end in fluid communication with the third chamber. An outlet pipe expels exhaust and water from the first chamber to the exterior. A connecting pipe provides fluid communication between the first and third chambers. The second end of the inlet pipe is above the bottom interior surface of the outlet pipe. The inlet pipe may have holes in the second chamber, above the bottom interior surface of the outlet pipe. The connecting pipe may have holes in the second chamber. The baffles may have holes for the water to flow from the second and third chambers to the first chamber. Also, an exhaust apparatus utilizing the muffler.

Abstract: An air induction housing having a perforated wall which provides a first intake noise attenuation modality and further having a sound attenuation chamber interfaced with the perforated wall which provides a second intake noise attenuation modality. Multiply apertured tubes of the sound attenuation chamber provide a Helmholtz resonator, wherein the tubes are superposed the wall perforations so that, attendant to the noise attenuation, ample air entry into the air induction housing is provided. The size, number and arrangement of the perforations is selected such that ample airflow is provided and audibility of intake noise is minimized in conjunction with the corresponding tubes of the sound attenuation chamber.

Abstract: A silencer includes a smaller cylindrical member having a planar portion and a larger cylindrical member arranged to closely contact at least a portion of the outer circumferential surface of the smaller cylindrical member. The larger cylindrical member as seen in a direction orthogonal to its axis provides an oblate cross section having a major axis X and a minor axis Y and the smaller cylindrical member is arranged to have the planar portion traversing the major axis X of the larger cylindrical member.

Abstract: A discharge muffler (20) in an HVAC&R system (100) includes a plurality of tubes (34, 38, 42) of predetermined length that are disposed at a predetermined spacing in substantially mutual axial alignment by a plate (30). The tubes (34, 38, 42) are secured adjacent to a compressor discharge (24) to minimize pressure reduction, improve flow characteristics and improve efficiency of the HVAC&R system (100).

Abstract: An exhaust system (1) is provided for an internal combustion engine (4), especially in a motor vehicle, with two separate exhaust gas lines (2, 3) with a first sound transmission feature (7), which couples the two exhaust gas lines (2, 3) with one another, and with a control (9) for activating and deactivating the first sound transmission connection (7) as a function of at least one operating parameter of the internal combustion engine (4).

Abstract: An exhaust system for an internal combustion engine having two banks of cylinders by which pulses of exhaust gas are alternately directed to a diverter subassembly. The diverter subassembly, which is located in the muffler, includes a perforated gas decelerator chamber which divides each pulse of exhaust gas between two exhaust outlets and causes a low pressure wave to occur in the exhaust system to enhance scavenging of a subsequent pulse of exhaust gas and thereby improve engine performance and mileage. The muffler further includes one or more cores and may or may not include a dead air space chamber to provide attenuation and tonal balance to the exiting exhaust gas.

Abstract: In a device for noise configuration in a motor vehicle which has an internal combustion engine with at least two gas conduits connected to different cylinders of the engine, the gas conduits are interconnected by means of a cross-flow section formed by a housing which encloses the gas conduits and which has at least two chambers in each of which one of the gas conduits is disposed, each of the gas conduits being in communication with the respective chamber by which it is enclosed by means of a respective cross-flow opening and the two chambers being in communication with one another by means of at least one cross-flow opening which is remote from the cross-flow openings of the gas conduits so as to provide for a phase shift of the sound waves of the gas flowing through the housing.

Abstract: A muffler having a baffle with angled plates includes a one piece baffle, a container and two end caps. The one piece baffle has at least three different configurations. The baffle preferably has two, three or four plates, namely “V”, “Z” or “W” shapes. Each one piece baffle configuration includes openings to allow exhaust flow therethrough. Each one piece baffle configuration is retained in the container. The container is terminated with end caps on each end thereof. At least one inlet tube and at least one outlet tube are attached to a perimeter of the container. In a second embodiment, the container and baffle are formed from a single piece of material. In a third and fourth embodiment, the inlet and outlet tubes are inserted through plates of the baffle. In a fifth embodiment, balanced tubes and chambers are added. In a sixth embodiment, a corrugated baffle is used.

Abstract: A tuned exhaust system for small two cylinder engines, the exhaust system including a pair of exhaust passage through which exhaust gasses pass. The exhaust passages are dimensioned to providing a tuning effect to the exhaust gasses for enhanced engine performance. The exhaust passages are not straight and elongated, but rather are sprialed, scrolled, coiled, or otherwise folded upon themselves at least twice. In this manner, the exhaust passages may be housed at least in part within a muffler having a significantly reduced overall size or profile, such that the muffler may be used in small engines.

Abstract: A muffler assembly for an internal combustion engine of a portable handheld work apparatus such as a motor-driven chain saw, cutoff machine or the like includes an exhaust-gas muffler (1) which has a muffler housing (10). The muffler housing (10) is formed essentially from two half shells (24, 25) connected substantially fluid-tight to each other. The interior space of the muffler housing (10) includes at least two chambers (2, 3) which are partitioned from each other by a partition wall (4). A catalytic converter (5) is mounted in the partition wall (4). In the interior space of the muffler housing (10), an exhaust-gas inlet (6) opens which is connected to an exhaust-gas stub (9) of the cylinder (8) of the engine. The exhaust-gas muffler has an exhaust-gas outlet (7) which conducts exhaust gas from the interior space.

Abstract: A fan shroud includes a fan shroud portion having a surface including an aperture. A cooling fan is supported proximate to the aperture for permitting air flow through the fan shroud from the environment to the engine compartment. An air intake portion is supported on the fan shroud portion. The air intake portion and the fan shroud portion together define at least a portion of an air passageway having an inlet for receiving ambient air and an outlet for connection to an engine throttle. The fan shroud portion and air intake portion may respectively include first and second circumferential portions that define the air passageway.

Abstract: A device for noise structuring in a motor vehicle has a plurality of gas-carrying lines connected to an internal combustion engine. At least two of the gas-carrying lines are acoustically linked together by at least one connection.

Abstract: A muffler for quieting the operation of a pneumatic tool. In one embodiment the muffler (630) is disposed within a volume defined by a peripheral wall (612) that receives an exhaust stream. An upper plate (631) having several open tubes (632) is disposed in the volume. Each tube is has an intermediate blocking plate (634). A plurality of sound-deadening panels (636) is disposed below the upper plate. The panels have apertures that slidably engage the tubes. A lower plate (650) is disposed below the tubes. The lower plate includes a plurality of apertures (657). One or more diffuser panels (652, 654) is disposed beneath the lower plate. An external exhaust vent (670) closes the volume. In operation, the exhaust enters the volume, is directed through the tubes, then into the sound-deadening panels, back into the tubes, and through the diffuser panels.

Abstract: An exhaust that has two isolated baffle systems in one container. This allows the exhaust from one manifold to be muffled and exhausted independently of the other manifold's exhaust. Moreover, the muffler is the same size as existing mufflers, so that it fits into the space of the prior art mufflers. Using two independent muffler elements (baffles and outer covering cans) eliminates all of the problems discussed above and increases the engine horsepower without reducing efficiency. An outer shroud covers the two muffler elements and is also designed to act as a heat exchanger. Fresh air can be pulled through the muffler to be heated for cabin heat and for carburetor heat. The shroud has space around the muffler cans, through which the fresh air passes. Inlet and outlet ports are provided to allow hoses to be connected as needed.

Abstract: The device for producing an overtone-rich, sporty exhaust sound of the exhaust system of a four-cylinder engine includes exhaust pipes with four manifold pipes, at least one front pipe and a tail pipe. The length and/or cross-section of at least one exhaust pipe differ from the length and/or cross-section of the other exhaust pipes. At least some of the exhaust pipes lead into a first, second and/or third collecting point.

Abstract: An exhaust system having an exhaust manifold that comprises a plurality of single-shell discrete exhaust pipes connected to an engine, a double-shell collective chambered pipe joined to the discrete exhaust pipes and comprising an internal pipe shell into which exhaust gas streams passing through the discrete exhaust pipes are introduced and merge together and an external pipe shell surrounding the internal pipe shell, and a spherical joint connecting the collective chambered pipe to the exhaust pipe. The discrete exhaust pipe has a bent portion and a straight portion continuously extending from the bent portion to the collective chambered pipe. The bent portions of the respective discrete exhaust pipes are oriented toward a center of a straight row of cylinders so as to lay the straight portions of the discrete exhaust pipes nearly parallel to one another.

Abstract: The present invention provides a sound attenuator for pneumatic exhaust that includes a body having an open end and an inner cavity defined by an inner wall, an inlet port provided in the body adapted to establish fluid communication between a source of pneumatic exhaust and the inner cavity, a cap releasably connected to the body to cover the open end, at least one exit port in fluid communication with the inner cavity, a plurality of baffles arranged within the inner cavity so as to define a series of sequential closed chambers between the inlet port and the exit port, and a deflector proximal to the exit port, the deflector redirecting the flow of pneumatic exhaust at least 90° and cooperating with an exterior surface of the body to define an expansion zone. Each of the baffles has a periphery in contact with the inner wall and is adapted to flex under a predetermined pneumatic pressure load to permit the pneumatic exhaust to flow between the periphery and the inner wall of the body.

Abstract: An engine including a silencer in the exhaust passage thereof, wherein an exhaust gas flow passage pipe is arranged in the silencer body and a particulate filter is arranged inside the exhaust gas flow passage pipe. A first exhaust gas inflow-outflow opening and a second exhaust gas inflow-outflow opening of the exhaust gas passage pipe and an exhaust gas inflow opening to the silencer body are arranged at one end of the silencer body. The exhaust gas is selectively supplied to the first exhaust gas inflow-outflow opening, second exhaust gas inflow-outflow opening, and exhaust gas inflowing opening.

Abstract: Systems and apparatus for degrading and cleaning combustion products of carbon-containing fuels such as fossil fuels. The systems and apparatus utilize catalytically reactive particles that are at least partially suspended by moving gases within a reaction chamber and maintained at a temperature sufficient to cause the suspended media particles, typically silica sand, silica gel, or alumina, to become catalytically reactive in the presence of moisture. Typically, the reaction chamber is maintained at a temperature in a range from about 30° C. to about 500° C. Moisture may be provided by the waste exhaust, although additional moisture may be introduced into the reaction chamber in order to maintain reactivity of the catalytically reactive particles. The systems and apparatus can be adapted to be used in combination with diesel engines or other internal combustion engines and industrial burners. The exhaust gases containing the incomplete combustion products can be further pressurized as needed.