14results about "Sound absorption" patented technology

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.

A system for generating power with reduced or negative carbon emissions. The system includes a power plant portion having a power generation unit having an input coupled to a supply of a hydrocarbon fuel and having an energy exchange pathway. The system also includes a direct air capture (DAC) portion having a CO2 adsorption device having a CO2 adsorption material and a blower electrically coupled to the power generation unit, the blower directing a flow of air through the CO2 adsorption device in a carbon capture mode, wherein the CO2 adsorption device is coupled to and in energy communication with the energy exchange pathway for releasing adsorbed CO2 in a carbon release mode.

An exhaust muffler includes a hollow body at least partially housing an exhaust pipe. The exhaust pipe is adapted to allow exhaust gas to flow therethrough. Further, the exhaust pipe defines a plurality of apertures on the exhaust pipe such that exhaust gas flowing through the exhaust pipe can flow out of the exhaust pipe within the hollow body through the plurality of apertures and / or back into the exhaust pipe from the hollow body. The secondary tube is disposed within the hollow body and is filled with a sound absorbing material. At least one baffle is engaged with the exhaust pipe and the secondary pipe to allow at least one of the exhaust pipe and the secondary pipe to pass therethrough.

The invention relates to a method for producing a molded part from glass fiber and / or mineral fiber material with an inorganic binder. The inorganic binder is cured using electromagnetic radiation in order to form the molded part. The tool is designed to be at least partly permeable for the electromagnetic radiation for curing purposes, and the inorganic binder is a binder which can be cured by electromagnetic radiation. The invention further relates to a molded part which can be obtained in the aforementioned manner. Finally, the invention relates to a manufacturing unit for producing a molded part from glass fiber and / or mineral fiber material and an inorganic binder. The manufacturing unit comprises a device for providing a tool for forming the molded part, a device for introducing the glass fiber and / or mineral fiber material and the inorganic binder into the tool, a device for generating electromagnetic radiation to cure the inorganic binder in order to form a molded part, and optionally a device for removing the molded part from the tool.

An exhaust muffler includes 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, wherein the inner surface defines a main exhaust gas flow path (P). At least one divider allows the exhaust pipe to pass therethrough and also divides the hollow body into a first chamber and a second chamber. The first chamber defines a reservoir fluidly associated with the main exhaust gas flow path (P) via the second set of orifices and leading to the environment via the first set of orifices, and the second chamber is fluidly associated with the main exhaust gas flow path (P) via the third set of orifices.

A hand-held work device comprises an internal combustion engine (8) and an exhaust silencer (23). The exhaust silencer (23) includes a first silencer chamber (47) and a second silencer chamber (48). The exhaust silencer (23) includes an exhaust aftertreatment device (26) comprising at least one flow-through unit (31). The flow-through unit (31) is arranged in a flow path from the first silencer chamber (47) to the second silencer chamber (48). The thickness (b) of the flow-through unit (31), measured from an upstream end face (36) to a downstream end face (37) of the flow-through unit (31) in the area through which exhaust gas flows, is at least 10 mm over at least 70% of the cross-section. The exhaust aftertreatment device (26) does not have a catalytically active coating.

Various implementations include a muffler including a shell and a tube assembly. The shell defines a shell cavity and has a shell longitudinal axis, a shell first end, and a shell second end. The shell first end and the shell second end each define a shell opening extending to the shell cavity. The tube assembly is disposed within the shell cavity. The tube assembly includes three or more nested tubes. Each of the three or more nested tubes has a tube longitudinal axis parallel to the shell longitudinal axis, a tube first end, and a tube second end. Each of the three or more nested tubes defines a plurality of perforations. The three or more nested tubes are disposed circumferentially adjacent each other around the shell longitudinal axis such that portions of sides of the three or more nested tubes form an open portion extending along the shell longitudinal axis.

System for interconnecting a urea-based reducing agent injector to an exhaust gas post-treatment device comprising an injector (UJ), a flange (FL) arranged to couple the injector to an exhaust gas line, a gasket (G) arranged between the injector and the flange, wherein the gasket is a sandwich, formed by two external layers (SI, S3) and an intermediate layer (S2) formed by insulating material. The Third layer of the gasket confines an air volume (V) surrounding the injector (UJ).

An apparatus for discharging condensate water from an exhaust system includes a housing configured to be secured to a piping component of the exhaust system and having an inlet in fluid communication with the piping component and an outlet to the atmosphere. An inlet and an outlet are arranged spaced apart from each other, and a discharge element formed of a porous material is arranged in the housing between the inlet and the outlet.

An exhaust muffler includes a hollow body that at least partially houses an exhaust pipe. The exhaust pipe is adapted to allow a flow of exhaust gases therethrough. Further, the exhaust pipe defines a plurality of orifices on the exhaust pipe such that the exhaust gases flowing through the exhaust pipe can flow out of the exhaust pipe within the hollow body and / or flow back into the exhaust pipe from the hollow body through the plurality of orifices. A secondary pipe is disposed within the hollow body and filled with a sound absorbing material. At least one baffle is engaged with the exhaust pipe and the secondary pipe to allow at least one of the exhaust pipe and the secondary pipe to pass therethrough.

Protective device for a vehicle component. Protective device (51) for a vehicle component (81) (100), in particular intended to at least partially cover a vehicle component (81) (100), in particular a catalytic reduction treatment system (5) for an engine (3), the device being characterized in that it comprises a protective cover (52) and an attachment system (60) for an electrical connection cable (82), the attachment system (60) being mechanically linked to the protective cover (52), the attachment system (60) comprising at least one attachment element (61), and in that it comprises a layer (55) of at least one thermally insulating material, intended to be disposed between said vehicle component (81) and said cover (52) and the attachment system (60). Figure for the abstract: 4

Various implementations include a muffler having a shell and a tube assembly. The shell defines a shell cavity and has a shell longitudinal axis, a shell first end, and a shell second end, each of which defines a shell opening extending into the shell cavity. The tube assembly is disposed within the shell cavity. The tube assembly includes three or more nested tubes. Each of the three or more nested tubes has a tube longitudinal axis parallel to the shell longitudinal axis, a tube first end, and a tube second end. Each of the three or more nested tubes defines a plurality of perforations. The three or more nested tubes are disposed circumferentially adjacent to one another around the shell longitudinal axis such that portions of the sides of the three or more nested tubes form openings extending along the shell longitudinal axis.

An exhaust duct assembly for conveying exhaust gases emanating from a combustion zone to atmosphere is disclosed. The assembly includes: an exhaust gas outlet for exhausting exhaust gas into the atmosphere; and an acoustic duct portion located upstream of the exhaust gas outlet, the acoustic duct portion having a peripheral wall defining a through-passage arranged and constructed to promote propagation of sound there-through. The acoustic duct portion has a length in a flow direction that is at least 50% of an average hydraulic diameter of the through-passage.

An exhaust silencer comprising a hollow body and an exhaust pipe, which is at least partially located within the hollow body. The hollow body defines a first set of openings, and the exhaust pipe defines a second and a third set of openings. The exhaust pipe has an inner surface and an outer surface, the inner surface defining a primary exhaust flow path (P). At least one partition allows the exhaust pipe to pass through and also divides the hollow body into a first and a second chamber. The first chamber is a reservoir connected to the primary exhaust flow path (P) via the second set of openings and to the environment via the first set of openings. The second chamber is in fluid communication with the primary exhaust flow path (P) via the third set of openings.