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WO/2024/056780A1 |
A handheld work apparatus comprises an internal combustion engine (A8) and an exhaust silencer (A23). A first silencer compartment (A47) and a second silencer compartment (A48) are formed in the exhaust silencer (A23). The exhaust silenc...
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WO/2024/049593A1 |
This disclosure relates to a refrigerant compressor including a diffuser with one or more quarter wave tubes. The compressor is used in a heating, ventilation, and air conditioning (HVAC) chiller system, for example.
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WO/2024/037333A1 |
An engine noise reduction structure, comprising a housing (1), wherein one end of the housing (1) is connected to a fuel engine gas exhaust pipe (4); at least one gas exhaust port (3) is provided in the housing (1); at least two noise re...
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WO/2024/028826A1 |
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, ...
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WO/2024/019631A1 |
A method for braking a low-overpressure gas flow can be used for braking gas flows containing particles that move coaxially with the gas flow but are not homogeneous therewith, such as inclusions in the form of a solid, liquid, plasma or...
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WO/2023/237819A1 |
The disclosure relates to a pressure controlling structure (1) comprising a first wall (2) extending from an inlet opening (3) at least in a first direction (4) and at least partly defining a first space (5) extending in a direction para...
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WO/2023/213341A1 |
In a sound damping device (100) having an absorption body (110) with an input opening (111) for the input of sound waves to be damped, and an output opening (112) opposite the input opening (111), effective sound absorption over a broad ...
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WO/2023/204826A1 |
An apparatus is disclosed for a firearm suppressor 100. In certain examples, the firearm suppressor 100 includes an outer cylinder 202 defining a longitudinal axis, and an inner cylinder 204 having an inner chamber, where the inner cylin...
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WO/2023/198288A1 |
The invention relates to an exhaust silencer system (6) for an armored multi-purpose vehicle (1), comprising: an exhaust silencer (7); a cooling-air guide housing (21) attached to the exhaust silencer (7); and an electrothermal converter...
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WO/2023/188686A1 |
A ventilation muffler having a ventilation path in which at least a portion of gas flow path sidewalls is composed of a porous acoustic material, wherein the flow resistance of the acoustic material is 1000 Rayl/m or higher, the porosity...
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WO/2023/189504A1 |
There is disclosed in the present invention a saddle-type vehicle that comprises: an exhaust pipe 51 and a catalyst device 53 that extend downward from a unit swing engine P. A downstream-side exhaust gas sensor S1 is disposed in a downs...
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WO/2023/189494A1 |
Disclosed is a saddled vehicle, comprising: a power unit P including an internal combustion engine 20 and a transmission device 60; a fan 56; and an exhaust pipe 51 and a catalytic device 53 that discharge exhaust from an atmosphere open...
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WO/2023/189500A1 |
Provided is a saddle-type vehicle comprising a vehicle body frame F, a unit swing engine P swingably supported by the vehicle body frame F via a link member 11, and an exhaust device 50 equipped with an exhaust pipe 51 and a catalyst dev...
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WO/2023/175302A1 |
A noise attenuator (120), comprising: an inner element that comprises an axially- extending inner wall (122) that encloses a hollow interior, at least a portion of the inner wall (122) being perforated; and an outer wall (136) extending ...
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WO/2023/175300A1 |
A noise attenuator (220), comprising: an inner element that comprises an axially- extending inner wall (222) that encloses a hollow interior, at least a portion of the inner wall (222) being perforated; an outer wall extending around the...
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WO/2023/171849A1 |
A vortex generation device according to an embodiment of the present invention includes: a central part extending in one direction and having a predetermined height; multiple main blades which extend from the central part to the other si...
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WO/2023/158733A1 |
An article comprising a plurality of layers or in form of powder or slurry, the layers comprising: one or more nonwoven layers (16) of powder or slurry; wherein each of the one or more nonwoven layers or powder or slurry has a temperatur...
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WO/2023/145614A1 |
Provided is a butterfly valve with which it is unlikely that exhaust gas hardly leaks to the outside of an exhaust pipe even under high back pressure. This butterfly valve comprises: a valve plate (110) provided inside an exhaust pipe ...
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WO/2023/112178A1 |
A muffler (10) with a check valve is attached to an exhaust port (6) of an evacuation device (1). A downstream check valve (60) of the muffler (10) comprises a spherical valve body (62) inserted into a downstream expansion chamber (16), ...
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WO/2023/104339A1 |
A method of controlling temperature of an engine aftertreatment system includes directing an exhaust heating device in an engine aftertreatment system to apply heat to the engine aftertreatment system; opening at least one of one or more...
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WO/2023/105422A1 |
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 exha...
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WO/2023/082341A1 |
A method for optimizing the opening degree of a tuning valve, comprising the following steps: constructing a muffler simulation model; constructing a back pressure simulation model to obtain a back pressure simulation result; comparing t...
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WO/2023/080864A1 |
The invention, is about broadband (~3 octaves) flow silencers and sound insulation structures, which are used to reduce noise carried by and emitted from fluid flows whilst enabling through-flow with minimal pressure losses in: cooling, ...
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WO/2023/076822A1 |
Examples of the disclosure describe systems and methods for reducing audio effects of fan noise, specifically, for a wearable system. A method wherein operating a fan of a wearable head device; detecting, with a microphone of the wearabl...
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WO/2023/052963A1 |
The muffler (7) comprises an intake pipe (21) for the exhaust gases that separates into a main pipe (27) and a secondary pipe (29). The muffler (7) further comprises a muffler body (31), which delimits an expansion volume (33) and houses...
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WO/2023/026070A1 |
The invention is a circular system with an integrated exhaust- diffuser that reveals an inlay construction of an air passage similar to a tunnel. The present invention through use of aerodynamics, completely releases the exhaust gas and ...
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WO/2023/016695A1 |
Disclosed is a secondary air line (10) for a section (13) of an exhaust tract (17) of an internal combustion engine (19), comprising a main line (14) with main flow axes (151, 152, 153, 154) arranged at an angle to one another and with d...
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WO/2023/285829A1 |
A method of washcoating a porous ceramic substrate, the method comprising: (i) pre-treating the substrate to form a pre-treated substrate;(ii) contacting the pre-treated substrate with a washcoat composition, wherein the washcoat composi...
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WO/2022/240596A1 |
A vehicle exhaust system (100) and method (1000) of minimizing a leaked mass flow comprising an exhaust component (108) defining a central axis (X-X') and having an inner surface (110) and an outer surface (112), such that the inner surf...
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WO/2022/209857A1 |
The present invention makes it possible to easily manufacture: an exhaust muffler device comprising a recessed section; and a saddle-riding vehicle provided with this exhaust muffler device. In the exhaust muffler device, a muffler bod...
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WO/2022/204789A1 |
The dual function exhaust system attachment, which is preferably used with an all-terrain vehicle, includes a muffler, a silencing cap, and a sound-enhancing plug. In a quiet configuration, the silencing cap is mounted to conceal a prima...
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WO/2022/202975A1 |
Provided is: a ventilation-type silencer with a high absorption rate, that suppresses the occurrence of wind noise, and having a high muffling effect in a low-frequency band; and an acoustic impedance structure. In an acoustic impedance ...
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WO/2022/195706A1 |
Provided is a muffler capable of preventing a plate from reaching high temperatures. A muffler according to the present invention is characterized by comprising: a chamber part formed by a hollow cylindrical part and a pair of plates pro...
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WO/2022/184491A1 |
Disclosed is a two-wheeled or three-wheeled vehicle (60) having a rear wheel (62) which can be driven by an internal combustion engine (1) and having a steerable front wheel (64), wherein the internal combustion engine (1) comprises a nu...
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WO/2022/180743A1 |
[Problem] To improve muffling performance of an engine muffler. [Solution] An engine muffler 41 comprises: a muffler body 94 that has a plurality of muffling chambers 111-113; and a plurality of partition walls 95, 96 that partition the ...
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WO/2022/180745A1 |
[Problem] To improve the degree of freedom in setting a muffler while increasing exhaust gas purification performance. [Solution] A general-purpose engine 1 comprises an engine body 3 that rotatably supports a crankshaft 11 and that is p...
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WO/2022/175645A1 |
A method of installing a window assembly into an opening of a building structure. The method including the steps of: detecting ambient noise levels at the opening of the building to identify a noise source; determining an elevation of th...
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WO/2022/155483A1 |
Exemplary air amplifiers utilize a high-pressure stream of gas to accelerate a low-velocity stream of gas to provide a high-velocity, high- volume stream of gas. This high-velocity, high-volume stream of gas generates unwanted noise as t...
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WO/2022/152936A1 |
An air/gas exhaust port protector comprises a body (1) with an inlet portion (9) and a chamber portion (10) that branches of in outlet channels (11). A first transition wall (14) extends between the inlet and chamber portions and compris...
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WO/2022/135146A1 |
Provided are a ventilation sound-diminishing apparatus (9) and a ventilation therapy device. The ventilation sound-diminishing apparatus (9) comprises a sound-diminishing housing (2) having a gas flow channel (1); the flow channel side w...
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WO/2022/129482A1 |
An engine assembly for a vehicle includes an internal combustion engine and an exhaust system. The exhaust system includes a catalytic converter, a main muffler, a hydrocarbon trap, a pre-muffler disposed upstream from the main muffler a...
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WO/2022/120823A1 |
Provided in the present invention is fracturing equipment, which comprises a plunger pump, a main motor, and a noise-reduction apparatus. The plunger pump is used for pressurizing a liquid. The main motor is transmissively connected to t...
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WO/2022/113689A1 |
An exhaust pipe (100) or an automobile muffler (1) has recessed parts (121) formed in a recessed shape on an outer circumferential surface of an outlet end part (110) through which exhaust gas is discharged.
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WO/2022/101044A1 |
Noise reducer (10) comprising a housing (12) having a shell (122), which is elongate along a housing axis and is rotationally symmetrical about the housing axis, and two end walls (123), which are oriented transversely in relation to the...
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WO/2022/100956A1 |
The invention relates to an internal combustion engine (10), comprising an exhaust tract (18) through which exhaust gas can flow from a combustion chamber (16), comprising a secondary air line (20), through which secondary air can flow a...
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WO/2022/092629A1 |
The present invention provides a meta-muffler which is capable of increasing a transmission loss of the noise flowing in a flow tube by maximizing a loss in sound energy of the noise introduced in a resonance chamber due to a stealth win...
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WO/2022/092645A1 |
The present invention provides a meta muffler which can increase the transmission loss of noise flowing inside a flow tube by maximizing the sound energy loss of noise entering a resonance chamber by using a tube connecting the flow tube...
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WO/2022/092630A1 |
The purpose of the present invention is to provide a meta muffler which can increase the transmission loss of noise flowing inside a flow pipe by maximizing the sound energy loss of noise entering a resonance chamber of a meta structure,...
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WO/2022/092646A1 |
The present invention provides a meta-muffler of a fractal structure, which is capable of increasing a transmission loss of the noise flowing in a flow tube by maximizing a loss in sound energy of the noise that is incident in a resonanc...
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WO/2022/083890A1 |
An aftertreatment system support assembly (1) for mounting an aftertreatment system module (5) on an engine. The aftertreatment system support assembly (1) comprises an aftertreatment system module (5) and a bracket (41) configured to be...
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