107results about "Gas chambers" patented technology

A method of designing a silencer by using an acoustic metamaterial according to the present disclosure includes distributing design variables through an experimental design method, performing optimal design on initial design proposals, obtaining an insertion loss of an optimal unit cell, and selecting a unit cell to be used first for effective noise reduction.

A muffler for an exhaust system of an internal combustion engine includes a muffler housing having a peripheral wall elongated along a longitudinal axis of the muffler housing. The peripheral wall has first and second end walls. A muffler insert is surrounded by the peripheral wall and is supported thereon. The muffler insert has a retaining wall extending in a direction of the longitudinal axis. The peripheral wall has a peripheral wall opening and a first exhaust-gas routing pipe has a first end region and is positioned with the first end region thereof engaging in the peripheral wall opening. The first exhaust-gas routing pipe has a second end region and is secured by the second end region thereof to the retaining wall. The first exhaust-gas routing pipe is of multi-part configuration and has a first pipe part and a second pipe part.

An embodiment of an exhaust handling system for a marine vessel includes a cap connected to a top end portion of an exhaust stack of the marine vessel to form an enclosure at least partially surrounding an outlet of an exhaust pipe extending through the exhaust stack. In addition, the exhaust handling system includes a collection pipe in fluid communication with the cap such that the collection pipe is to receive exhaust from the enclosure, and a coupling connected to the collection pipe that is to connect to an exhaust cleaning assembly. The exhaust cleaning system includes a tank to receive the exhaust. The cap at least partially defines a first flow path for the exhaust that extends from the enclosure to the atmosphere. The collection pipe at least partially defines a second flow path for the exhaust that extends from the enclosure to the coupling via the collection pipe.

In the present invention, a plurality of holes (61-68) are provided in a pipe (50) disposed in a chamber communicating with an engine (10), openings (51, 52) at the ends of the pipe are closed, and a space (A4) communicating with the chamber via the plurality of holes (61-68) is formed.

Conveying unit (1) for a liquid additive, comprising a block (2) with channels (3) to which at least one active component (4) for conveying the liquid additive is mounted, wherein at least three channels (3) in the block (2) open into a cylindrical collecting chamber (5), and a deformable sleeve-shaped element (6) is arranged in the collecting chamber (5), wherein the sleeve-shaped element (6) has at least one sealing lip (26) which seals the collecting chamber against the surroundings of the block.

The invention relates to an exhaust muffler for an internal combustion engine used in a vehicle. The exhaust muffler controls a quality of the exhaust noise without substantially increasing the size of the exhaust muffler. Additionally, the exhaust muffler increases the exhaust noise (produces a booming effect) without substantially increasing the size of the exhaust muffler.

An integrated catalyst reformer is described, including a housing which surrounds and defines at least two individualized and adjacent chambers. The first chamber is intended for the catalytic conversion of exhaust gases from the MCI and at least one second chamber intended for reforming fuel, ethanol or others, and the heat generated in the first chamber is transferred to the second chamber by thermal conduction. The first chamber is connected, upstream, to the exhaust manifold of the MCI from the inlet nozzle and is connected to the exhaust of the vehicle from the outlet nozzle, while the plenum of the first chamber is filled with a catalytic mesh. The second chamber includes a plenum filled with a catalytic mesh; an intake nozzle intended to receive both ambient air and the fuel to be reformed; and an exhaust nozzle, connected upstream of the intake manifold, so as to allow the reformed fuel to be aspirated.

An exhaust gas purification device for measuring air / fuel ratio accurately and for enhancing a purification performance without increasing a size of a catalyst. The exhaust gas purification device comprises: header pipes through which exhaust gas flows; a catalytic converter arranged downstream of the header pipes; a diffusion chamber arranged between the header pipe and the catalytic converter; and a receiving surface with which the exhaust gas flowing into the diffusion chamber collides. An orifice is formed in a downstream end plate of the diffusion chamber, and an air / fuel ratio sensor is arranged downstream of the orifice.

A mixer for an exhaust system of an internal combustion engine for mixing exhaust gas and reactant comprises a mixing chamber (18), a reactant delivery arrangement (28) for delivering reactant into the mixing chamber (18) axially between an upstream mixer wall (14) and a downstream mixer wall (16), an inlet opening arrangement (22) in the upstream mixer wall (14), an outlet opening arrangement (34) in the downstream mixer wall (16), and a flow guide arrangement (40) arranged between the upstream mixer wall (14) and the downstream mixer wall (16), wherein the flow guide arrangement (40) provides a first flow path (42) leading from the inlet opening arrangement (22) to the outlet opening arrangement (34) and a second flow path (42') leading from the inlet opening arrangement (22) to the outlet opening arrangement (34). each flow path (42,42') has at least two flow channels (44, 48, 52, 44', 48' 52') leading from the inlet opening arrangement (22) to the outlet opening arrangement (34).

Reducing agent delivery unit (10) comprising: a fluid injection valve (12) having a fluid inlet (30) arranged at a first end of the fluid injection valve (12) for receiving a reducing agent, and having a fluid outlet (32) arranged at a second end of the fluid injection valve (12) for discharging the reducing agent, wherein the fluid injection valve (12) defines a fluid path for the reducing agent from the fluid inlet (30) to the fluid outlet (32), wherein the fluid injection valve (12) comprises: a tubular element (42) having one end disposed at the fluid inlet (30) of the fluid injection valve (12), the tubular element (42) being configured to conduct reducing agent along the fluid path; a filter (204) disposed in the tubular member (42) proximal to the fluid inlet (30) of the fluid injection valve (12); a volume reducing element (208) arranged in the tubular element (42) downstream of the filter (204) with respect to a direction of the reducing agent flow along the fluid path from the fluid inlet (30) to the fluid outlet (32) of the fluid injection valve (12), wherein the volume reducing element (208) contacts an inner surface of the tubular element (42) and comprises a bore (208A) defined by the volume reducing element (208), wherein the bore (208A) defines at least a portion of the fluid path through the fluid injection valve (12), wherein the diameter of the bore is between 12% and 20% of the outer diameter of the volume reducing element (208) and the volume reducing element (208) occupies a volume in the tubular element (42) such that the volume reducing element (208) reduces a volume of the fluid path occupied by the reducing agent in the fluid injection valve (12); and a cap member (206) in which the filter (204) is arranged, the cap member (206) being engaged with and secured to the volume reducing member (208) such that the filter (204), the volume reducing member (208) and the cap member (206) form a single member.

An internal combustion engine 9 comprises at least one piston-cylinder system 13 having an intake port and an exhaust port. An exhaust pipe 17 is connected to the exhaust port 13.5, and a catalytic converter 19 and a muffler 21 are arranged in this order along the exhaust pipe. The catalytic converter 19 is located upstream of the muffler 21 with respect to the exhaust gas flow direction along the exhaust pipe 17. The resonant system 29 is connected to the exhaust pipe 17 and includes a resonant pipe 25 and a resonant cavity 27. A resonant tube 25 fluidly couples the exhaust pipe 17 with the resonant cavity 27, and the resonant tube 25 is connected to the exhaust pipe 17 upstream of the catalytic converter 19 with respect to an exhaust gas flow direction along the exhaust pipe 17. The resonant tube 25 and the exhaust tube 17 are tangent at the connection position thereof.

An exhaust gas cooling device (1) for a hot gas source (8), wherein the exhaust gas cooling device (1) comprises: a housing (3.6) connectable to an exhaust pipe (1.1) of the hot gas source (8) with an axis of symmetry (3.5), a Venturi assembly (5) coupled to the housing (3.6) for introducing exhaust gas (1.2) and ambient air (9), and an exhaust gas / ambient air mixture discharged into the environment (2), wherein the Venturi assembly (5) has a Venturi channel (5.1) which can be fluidically coupled to the exhaust pipe (1.1) and an inlet opening (5.2) for ambient air which is limited by the Venturi channel (5.1) and the exhaust pipe (1.1), the Venturi channel (5.1) serves to guide exhaust gas-ambient air mixture, wherein the Venturi channel (5.1) has an outlet opening (5.3) and the outlet line (2) has an inlet opening (2.1), wherein the outlet opening (5.3) and the inlet opening (2.1) are spaced apart, and wherein the Venturi channel (5.1) and the outlet pipe (2) open into the housing (3.6), characterized by a) that the outlet opening (5.3) of the Venturi channel (5.1) and the inlet opening (2.1) of the outlet line (2) are positioned in alignment, wherein a deflection element (4) is provided between the outlet opening (5.3) and the inlet opening (2.1) which causes a deflection in a direction Rq with a directional component perpendicular to the direction of the gas outlet A of the outlet opening (5.3), or b) that the outlet opening (5.3) of the Venturi channel (5.1) causes a gas outlet A directed radially to the axis of symmetry (3.5), wherein the outlet line (2) with the inlet opening (2.1) causes a gas inlet E directed parallel to the axis of symmetry (3.5).

The present invention relates to exhaust mixers. Methods and systems for mixers are provided. In one example, a system can include a mixer disposed in a passageway, and the mixer is configured to mix two different gases upstream of a device.

To provide an exhaust device capable of improving cleaning performance while suppressing increase of a catalyst loading amount.SOLUTION: An exhaust device ED comprises: an exhaust chamber 32 that forms an expansion space SP in an exhaust passage EP in which exhaust gas G expands; a chamber inlet pipe 30 connected to the exhaust chamber 32, and having a downstream end that opens to the expansion space SP; a first catalyst 40 arranged upstream of the expansion space SP in the exhaust passage EP; and a second catalyst 42 arranged in the chamber inlet pipe 30 and facing the expansion space SP.SELECTED DRAWING: Figure 3

The invention provides an exhaust gas purification device for an internal combustion engine, which can improve the purification performance of exhaust gas without increasing the size of a catalyst, suppress the variation of each cylinder, and appropriately detect the air-fuel ratio. An exhaust purification device (1) for an internal combustion engine is provided with: an exhaust manifold (2) having one or more exhaust flow paths through which exhaust gas discharged from a plurality of cylinders flows; a catalytic converter (3) attached to the downstream side of the exhaust flow path; and a collision diffusion chamber (4) provided between the exhaust gas flow path and the catalytic converter (3) and having a collision surface (4a) in which the main flow of the exhaust gas flowing in through the exhaust gas flow path collides with the inner wall, in which a throttle section (5) having a smaller flow path cross-sectional area than the portion in which the exhaust gas flows in the collision diffusion chamber (4) is formed on the downstream side of the collision diffusion chamber (4), and in which the flow path cross-sectional area of the throttle section (5) is smaller than the flow path cross-sectional area of the exhaust gas flowing in the collision diffusion chamber (4). An air-fuel ratio sensor (7) for detecting the air-fuel ratio of the engine is provided on the downstream side of the throttle section (5).

An exhaust muffler comprises a hollow body and an exhaust pipe disposed at least partially within the hollow body. The hollow body defines a first set of apertures on the hollow body and the exhaust pipe defines a second set of apertures and a third set of apertures on the exhaust pipe. The exhaust pipe has an inner surface and an outer surface. The inner surface defines a primary exhaust gas flow path (P). At least one divider allows the exhaust pipe to pass therethrough, and divides the hollow body into a first chamber and a second chamber. The first chamber defines a reservoir fluidly associated with the primary exhaust gas flow path (P) via the second set of apertures, and to the environment via the first set of apertures. The second chamber is fluidly associated with the primary exhaust gas flow path (P) via the third set of apertures.

[Problem] To provide a sound pressure reducing structure capable of reducing sound pressure near the primary resonance frequency of a pipeline while reducing installation space. [Solution] This sound pressure reducing structure comprises: a pipeline that has a first open end and a second open end in the extending direction; a first λ / 4 resonance pipe and a second λ / 4 resonance pipe that each have a resonance frequency which is higher than the primary resonance frequency of the pipeline and is lower than the secondary resonance frequency of the pipeline; and a connection part that is provided between the first open end and the second open end, connects the first λ / 4 resonance pipe and the second λ / 4 resonance pipe to the pipeline in a manner as to be disposed with a gap therebetween in the extending direction, and satisfies equation (1). The sound pressure reducing structure has: a change position b1 at which an acoustic impedance zb at the primary resonance frequency of the pipeline discontinuously changes along the extending direction; and a position a1 that is the closest to the first open end among a plurality of points of intersection between a differential zb' of the acoustic impedance zb and a differential za' of an acoustic impedance za of the pipeline at the resonance frequencies of the first λ / 4 resonance pipe and the second λ / 4 resonance pipe. The position of the connection part in the extending direction is between the position a1 and the change position b1.

To provide an exhaust gas purification device which can further reduce a PM discharge amount at an initial stage of the start of use.SOLUTION: An exhaust gas purification device 1 includes a first air discharge path 51 and a second air discharge path 52 connected in parallel with each other and connected to an air discharge pipe 18 at a downstream side of a GPF 20B. At an initial state of the GPF 20B, the first air discharge path 51 communicates with a tail pipe 56 via a sub-filter 53 for collecting and removing PM, and after the start of use of the GPF 20B, the sub-filter 53 is clogged by the collected PM to block the communication with the tail pipe 56. At an initial state of the GPF 20B, the second air discharge path 52 is closed by a liquid (water) 57, and after the start of use of the GPF 20B, the sub-filter 53 is clogged by the PM to increase a pressure damage on the sub-filter 53 and increase the discharge pressure, and a discharge of the liquid (water) 57 and / or evaporation of the liquid (water) 57 allows a communication with the tail pipe 56.SELECTED DRAWING: Figure 2

A selective catalytic reduction (SCR) system, comprising a box body, a mixer, a baffle and a carrier, the mixer, the baffle and the carrier being sequentially arranged inside the box body in an airflow direction inside the box body, the baffle being provided with a plurality of through holes, and the distribution density of the through holes and / or the hole area of the through holes being negatively correlated with a distribution uniformity index of NH3 at the baffle. The configuration of the distribution density and the hole area of the through holes can improve the mixing uniformity of ammonia gas, so that a reaction effect of a catalyst and a mixed gas in the carrier is enhanced. The settings of the distribution density and the hole area of the through holes can improve the mixing uniformity of an ammonia gas.

The panel assembly (100) includes a panel member (116), a frame member (118), and at least one first rod member (120) and at least one second rod member (121). The at least one first rod member (120) and the at least one second rod member (121) divide the panel member (116) into a plurality of first regions (161) defining a first height (H4) and a first width (W4). The panel assembly (100) further includes a plurality of support devices (124) for dividing each first region (161) into a plurality of second regions (163). Each support device (124) includes a first support member (162) defining a first length (L2), such that the first width (W4) defined by the first region (161) is greater than the first length (L2). Each support device (124) also includes a second support member (164) defining a second length (L3), such that the first height (H4) defined by the first region (161) is greater than the second length (L3).

The present invention provides an austenitic heat-resistant cast steel which is characterized by containing, on a mass basis, 0.30-0.50% of C, 0.50-2.0% of Si, 0.50-2.0% of Mn, 0.10-0.40% of S, 16.0-21.0% of Cr, 6.0-12.0% of Ni, 0.5-2.0% of Nb and 0.80% or less of Cu, with the balance being made up of Fe and unavoidable impurities.

The present invention relates to an exhaust muffler for an internal combustion engine used in a vehicle. The exhaust muffler controls the quality of exhaust noise without significantly increasing the size of the exhaust muffler. In addition, the exhaust muffler increases exhaust noise (a roar effect is generated) without significantly increasing the size of the exhaust muffler.

A heat-resistant, austenitic cast steel comprising by mass 0.30 to 0.50% of C, 0.50 to 2.0% of Si, 0.50 to 2.0% of Mn, 0.10 to 0.40% of S, 16.0 to 21.0% of Cr, 6.0 to 12.0% of Ni, 0.5 to 2.0% of Nb, and 0.80% or less of Cu, the balance being Fe and inevitable impurities.

The present disclosure provides a muffler with a simple structure and a low cost. The muffler is formed by an exhaust pipe. The exhaust pipe has an extension direction and a radial direction, an exhaust gas is discharged through the exhaust pipe. At least a partial region of an interior of the exhaust pipe is divided into a muffling chamber and an exhaust passage portion by a partition plate arranged along the extension direction. A cross-sectional area of the exhaust passage portion is larger than that of the muffling chamber. At a downstream end portion of the muffling chamber in a flow direction of the exhaust gas, a peripheral wall of the exhaust pipe on the muffler chamber side is engaged with the partition plate, thereby closing a downstream opening of the muffling chamber in the flow direction of the exhaust gas.

To provide an exhaust gas treatment device for an exhaust system of an internal combustion engine.SOLUTION: A treatment device 1 includes: a tubular duct 2 divided by a tubular side wall 4, and including an inlet opening portion 5, an outlet opening portion, and an injection opening portion 7 obtained through the tubular side wall 4 and designed to receive a reducing substance injection device; and a mixing body portion forming a reinforcement passage for an exhaust gas to pass so as to flow from the inlet opening portion 5 to the outlet opening portion. The mixing body portion includes a first base wall facing the outlet opening portion of the tubular duct 2, partially engaged with a cross-section of the tubular duct 2, and having a partially circular shape leaving only a half moon-shaped passage area, and a second base wall facing the inlet opening portion 5 of the tubular duct 2, completely engaged with the cross-section of the tubular duct 2, including a main hole 12 at its center, and having a circular shape.SELECTED DRAWING: Figure 1

A muffler for an exhaust system of an internal combustion engine includes at least one muffler component with a perforation defined by a plurality of through-flow openings in a wall of the muffler component. The through-flow openings can be flowed through in a flow direction in the direction from an upstream side of the wall to a downstream side of the wall. At least in the case of some or all of the through-flow openings of the perforation, a through-flow opening flow cross section decreases in the flow direction in order to provide a through-flow opening flow-guiding surface.

A sound damper for a fuel-cell system includes a tubular sound-damper casing made of plastic material. The casing is elongate in the direction of a sound-damper longitudinal axis. A first sound-damper end piece made of plastic material is fixed to the sound-damper casing at a first axial end of the sound-damper casing. A second sound-damper end piece made of plastic material is fixed to the sound-damper casing at a second axial end of the sound-damper casing. On at least one sound-damper end piece, at least one fastening element is provided for fastening the sound damper to a support structure.

Surface-true transverse silencer (210), comprising: a housing (212) having two side portions (224) and a central portion (222) formed therebetween, the central portion (222) having a height less than the height of one of the side portions (224), wherein the central portion (222) has partition walls (254) dividing the central portion (222) into one or more expansion chambers (256), one or more exhaust tailpipe extensions (260), and a balance pipe, further comprising two spaced-apart inlet openings (238) on one side of the central portion (222) for receiving exhaust gas from an internal combustion engine (10), wherein a first and a second of the partition walls (254) each have a first portion positioned to extend from the side of the central portion (222) adjacent the respective inlet opening (238) in a first direction away from the side, and a second portion positionedthat it extends in a second direction towards the side portion (224) to direct the exhaust gas to each of the respective side portions (224).

The invention relates to an exhaust gas aftertreatment device, wherein the exhaust gas aftertreatment device (A32) comprises a throughflow unit (A33), which is held in a housing (A34) of the exhaust gas aftertreatment device (A32), wherein the throughflow unit (A33) comprises at least one wire body (A36, A40), wherein the wire body (A36, A40) has at least one first region (A37, A41) having a first mean density and at least one second region (A38, A42) having a second mean density, the second mean density being at least 1.5 times the first mean density, and wherein the wire body (A36, A40) is held in a clamped manner on the second region (A38, A42) between at least two clamping portions (A46, A47) of the housing (A34).

In the present disclosure is proposed a novel sound attenuating element for, at least in part, providing adequate or preferably improved sound attenuating properties without excessively impeding flow while being susceptible to automated or machine assisted manufacturing or for providing the public with a useful alternative. The novel sound attenuating element is formed at least in part by an assembly of a plurality of components which are successively connected to each other, which each exhibit a curved shape, and which form at least one non-planar ruled surface when assembled.