ПЛАСТИНЧАТЫЙ ГЛУШИТЕЛЬ ШУМА К КАНАЛЬНЫМ ВЕНТИЛЯТОРАМ

FIELD: acoustics.SUBSTANCE: invention relates to the noise suppression equipment. Muffler contains a housing of square cross-section, rigidly connected with end inlet and outlet nozzles, sound-absorbing plates made of a frame containing perforated sheets, filled with a sound absorber and positioned inside housing with certain spacing and forming therein flat channels, between sound absorber and perforated sheets there is an acoustically transparent material, absorber for sound-absorbing plates is made in the form of two outer perforated walls and an inner, middle wall, made in the form of a membrane resonant plate, between which are layers of sound absorbing material, the frame is made symmetrical with respect to the middle wall, which divides it into two congruent parts, each of which has three layers of sound-absorbing material, and more rigid, first layers are made solid, profiled and fixed respectively on the outer perforated walls, second layers, softer than the first ones, are made intermittent and located with a gap in the focus of the sound reflecting surfaces of the first layers, the second layers have a rotation body shape in the form of cones connected by bases, and the first layers are made of a material with a sound reflecting coefficient greater than its sound absorption coefficient in the form of profiles of conical surfaces that focus the reflected sound on the second layers, and the third sound-absorbing layers are made of foamed sound-absorbing material in the form of a construction sealing foam and are located in gaps and voids formed between the first and second layers, each of the outer perforated walls is rigidly connected to the corresponding second layer by means of vertical fastening elements perpendicular to it, made in the form of plates, one end of which is rigidly fixed to the outer perforated wall, and the second end is made in the form of clamps covering the rods respectively and tightening them with screws, while the rods are made ...

ГЛУШИТЕЛЬ

Abgasanlage für eine Brennkraftmaschine

Die Erfindung betrifft eine Abgasanlage (1) für eine Brennkraftmaschine, mit einer in einen ersten Schalldämpfer (6) einmündenden ersten Abgasleitung (4) und einer strömungstechnisch parallel zu der ersten Abgasleitung (4) vorgesehenen, in einen zweiten Schalldämpfer (7) einmündenden zweiten Abgasleitung (5), wobei die Abgasleitungen (4, 5) stromaufwärts des jeweiligen Schalldämpfers (6, 7) an einem Abzweig (3) an eine gemeinsame Abgaszuführleitung (2) angeschlossen sind. Dabei ist vorgesehen, dass in der ersten Abgasleitung (4) stromaufwärts des ersten Schalldämpfers (6) ein Stellventil (12) angeordnet ist, wobei strömungstechnisch zwischen dem Abzweig (3) und dem Stellventil (12) eine Dämpfungseinrichtung (13) zur Dämpfung von Abgasresonanzschwingungen vorgesehen ist.

Passiver Schalldämpfer mit Helmholtz-Resonator für mehrflutige Abgasanlagen

Ein passiver Schalldämpfer (10) für eine Abgasanlage weist ein gasdichtes Schalldämpfergehäuse (10a), wenigstens drei an dem Schalldämpfergehäuse (10a) ausgebildete Anschlüsse (20a, 20b, 20c, 20d), ein in dem Schalldämpfergehäuse (10a) angeordnetes Mischgehäuse (10c) und wenigstens ein in dem Schalldämpfergehäuse (10a) angeordnetes Resonatorrohr (10d) auf. Das Schalldämpfergehäuse (10a) umschließt ein Innenvolumen, welches ein Helmholtz-Volumen (10e) umfasst. Wenigstens ein Anschluss (20a, 20b) der wenigstens drei Anschlüsse (20a, 20b, 20c, 20d) ist dafür ausgebildet, in der Abgasanlage geführtes Abgas in das Schalldämpfergehäuse (10a) einzuführen. Wenigstens ein anderer Anschluss (30a, 30b) der wenigstens drei Anschlüsse (20a, 20b, 20c, 20d) ist dafür ausgebildet, Abgas aus dem Schalldämpfergehäuse (10a) abzuführen. Das Mischgehäuse (10c) ist in dem Innenvolumen angeordnet und stellt wenigstens eine Mischkammer (10b, 10b') bereit, die eine Fluidverbindung zwischen einigen oder allen der ...

Abgasschalldämpfer

The invention relates to a silencer which is designed, in particular, to be suitable as a terminal silencer. Said silencer is configured as a simple Helmholtz resonator and is characterised in that it has excellent silencing properties provided by a compact construction, it can be constructed in a modular manner and that the acoustic design for silencing the exhaust noise can be fine-tuned. To this end, the pipe (2) that conveys the exhaust gas, which runs continuously through the silencer housing (1), the latter containing several chambers (6), remains practically devoid of dissipation in at least two, preferably three pipe runs with large curvature radii, even in the transition section of the runs. In addition, a high degree of silencing is achieved by the effective cross-sections of the resonance cavities, which are identical for each chamber, whereby said cavities open into each chamber from two or three pipe runs.

VERFAHREN ZUM BEREITSTELLEN EINES LECKFREIEN AKUSTISCHEN VOLUMENS FÜR EIN FAHRZEUGRAHMENELEMENT

Ein Verfahren zum Ausbilden eines akustischen Volumens in einem Fahrzeugbauteil umfasst das Bereitstellen eines Fahrzeugrahmenelements mit einer hohlen Kavität, das Ausbilden einer Innenschale, die vollständig abgedichtet ist und mindestens eine Anschlussstelle aufweist, und das Anordnen der Innenschale innerhalb der hohlen Kavität. Mindestens ein Abgasanlagenbauteil ist zur Bereitstellung mindestens eines akustischen Volumens an der Anschlussstelle mit der Innenschale verbunden.

An exhaust gas silencing system for an internal-combustion engine

... 1,094,211. Exhaust silencers. WALKER MANUFACTURING CO. Oct. 23, 1964 [Oct. 30, 1963], No. 43293/64. Heading F1B. An exhaust silencer system comprises resonant silencing devices 9, 11, tuned to different harmonics. A further silencer 7 for silencing high frequencies is also provided and comprises a number of small chambers (43), (45), (47), (49), (51), Fig. 2 (not shown) formed by pinched in portions (33) of an outer sleeve surrounding a perforated inner pipe (29). The silencer 9 comprises an approximately rectangular cross-section outer casing 71 Fig. 5 (not shown) forming a resonator chamber around the perforated flow pipe 79, the chamber being tuned to the third harmonic of the fundamental frequency in the exhaust pipe. The casing (71) has an inner layer of stainless steel and an outer layer of aluminized steel. The silencer 11, Fig. 7, which is tuned to the fifth harmonic, comprises a flow pipe 123 perforated over the portion 111 and surrounded by a shell 107 to form a first resonant ...

Silencer for internal-combustion engines

... 1,094,212. Exhaust silencers. WALKER MANUFACTURING CO. Oct. 23, 1964 [Oct. 30, 1963], No. 33119/67. Divided out of 1,094,211. Heading F1B. The subject matter is included in that of Specification 1,094,211 but the claims relate to the construction of silencer (9), Fig. 1 (not shown).

VEHICLE ENGINE EXHAUST MUFFLERS

A moulded ceramic or porcelanic body 1 has at least one end cover 3 with an aperture for an exhaust flow pipe 5. The body is covered by insulating rock wool packing 10. Figs. 4 and 5 inside a protective aluminum-plated metal casing (11). The metal casing (11) has end covers (12, 13) made of the same metal, which have edges flanged over end flanges (15) of the body. Both metal covers have holes, each with a neck (16), through which the ends of the exhaust flow pipe 5 project. ...

NOISE ABATING LIQUID-GAS SEPARATOR

IC ENGINE INTAKE AND EXHAUST SILENCERS

... 1437717 Silencing gaseous flow C C WARE 8 May 1973 [22 May 1972] 21866/73 Heading FIB In a silencer 10 the gases flowing through a throat 14, e.g. a Venturi, pass to passages 12 and 13 having relatively diverging axes which may diverge from the longitudinal axis of the throat symmetrically or assymmetrically. Flow modifying means 18, 20 are provided at the throat for affecting the gas flow to the passages 12 and 13. The passage 12 is connected to a damping chamber 17 which may be connected to the flow directing port 18 opposed to the flow directing port 20. The pressures and flows from the ports 18 and 20 determine the flow of gas through the passages 12 and 13. The damping chamber may be defined by a housing (35), Figs. 4 to 8 (not shown), surrounding the throat (45, 51, 61, 71). The flow modifying means may be provided by discontinuities (52, 53), Figs. 5 to 8 in the throat. A baffle (48) may be provided at the outlet of the passage (44) connected to the damping chamber and a further ...

Silencer for gaseous currents

... 403,651. Silencers for gaseous currents. BURGESS LABORATORIES, Inc., C. F., Madison, Wisconsin, U.S.A.-(Assignees of Jack, W. A. ; Madison, Wisconsin, U.S.A.) June 20, 1932, No. 17411. Convention date, June 20, 1931. [Class 7 (ii).] A silencer for gaseous currents comprises a conduit which permits of a substantially unobstructed gas flow and has a wall of soundabsorbing material, and a side branch chamber in communication with said conduit. The branch chamber acts as an acoustic filter and is effective in removing low frequencies, the high frequencies being removed by the absorbing material. A casing 10, Fig. 1, has end openings 11, 12 either of which may be used as inlet and the other as outlet. A duct 13 extends from one of the openings and has a perforated wall surrounded by filling material of the kind mentioned in Specification 312,937, [Class 7 (ii), Internal-combustion engines, Arrangement &c. of], to act as an absorbing medium. Between the filling material and casing is the side ...

An improved exhaust system of a single cylinder foile station in a bwa communication system ur stroke spark ignition engine

Internal combustion engine, vehicle marine vessel,and secondary air supply method for internal comb ustion engine

Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine.

An improved exhaust system of a single cylinder foile station in a bwa communication system ur stroke spark ignition engine

Internal combustion engine, vehicle, marine vessel, and secondary air supply method for internal combustion engine

Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine

An improvement exhaust system of a single cylinderfour stroke spark ignition engine

Quiet and distorting device of the acoustic waves.

Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine

An improved exhaust system of a single cylinder foile station in a bwa communication system ur stroke spark ignition engine

Internal combustion engine, vehicle, marine vessel, and secondary air supply method for internal combustion engine

Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine

Internal combustion engine, vehicle, marine vessel, and secondary air supply method for internal combustion engine

MUFFLER FOR AN EXHAUST SYSTEM

WASTE GAS SYSTEM

MUFFLERS FOR USE WITH ENGINE RETARDERS; AND METHODS

A muffler (1) is described for muffling both positive power and compression brake type engine retarders. The muffler includes an outer shell (3) defining an internal volume (45). A first, inner, perforated wall (57) is spaced from the outer shell and defines a first, annular, volume (55) therebetween. A first volume of packing material (59) is positioned within the annular volume. An inlet tube (6) is oriented within the internal volume. In certain embodiments, the inner perforated wall circumscribes at least a portion of the inlet tube, and extends a distance of at least 25 % of the axial length of the outer wall. Both single and dual muffler systems are described. Methods of use and operation are also provided.

ENGINE EXHAUST MEANS FOR MOTOR PROPELLED BOATS

A motor-propelled boat comprising a boat hull, internal combustion engine means mounted on the boat hull through resilient mounting means and adapted to drive propulsion means, the engine means including body means and exhaust means connected with the body means, the exhaust means including exhaust pipe means rigidly connected with the engine body means and noise attenuating means which includes housing means having one end connected to the exhaust pipe means and substantially totally made of resilient material so that engine vibrations transmitted through the exhaust pipe means are absorbed by the housing means, and perforated pipe means disposed in the housing means and being supported by the housing means, the perforated pipe means being in communication with the exhaust pipe means and having perforations so that resonance chamber means is formed between the housing means and the exhaust pipe means.

SILENCER

MUFFLER

A muffler equipped with an inner pipe and an outer pipe which, along with the inner pipe, forms a double-wall pipe, wherein: a cavity is provided between the inner and outer pipes, the interval between the inner and outer pipes at a first end of the double-wall pipe is sealed, the interval between the inner and outer pipes at a second end of the double-wall pipe is open, and the cavity is connected to the exhaust channel via this opening. The cavity is formed as a result of the inner pipe being shaped in a manner such that a section of the outer-circumferential surface of the inner pipe is positioned to the inner-circumferential side relative to a reference, with the reference being the position of the inner-circumferential surface of the outer pipe.

MUFFLER

A muffler including a double-pipe structure to muffle sounds in two or more frequencies is provided. The muffler includes an inner and outer pipes with a clearance therebetween. The inner pipe includes a first and second outer surfaces, and, at one end, an opening communicating with the outer pipe. The clearance communicates with an exhaust passage via the opening. The second outer surface forms the opening and is situated closer to the center of the inner pipe than the first outer surface is. A space between the inner and outer pipes is closed due to a contact between the first outer surface and an inner-circumferential surface of the outer pipe. A part of the clearance is formed between the first outer surface and the inner-circumferential surface. The outer-circumferential surfaces of the inner pipe include at least one communication hole that communicates the inner pipe with the clearance.

MUFFLER

A muffler comprises a double pipe section formed by inserting an end of a first pipe-like member (10) into a second pipe-like member (20) from an end thereof. The front end section (23) of the second pipe-like member is joined to the outer peripheral surface of the first pipe-like member. The portion of the second pipe-like member which forms the double pipe section is provided with: a first portion (22) which is located close to the front end of the first pipe-like member; and a second portion (21) which is located close to the front end of the second pipe-like member and which has a greater diameter than the first portion. A resonance chamber (31) is formed between the first pipe-like member (10) and the second portion (21). A connection passage (32) which connects an exhaust gas flow passage and the resonance chamber is formed between the first pipe-like member (10) and the first portion (22). A Helmholtz resonance system is formed by the resonance chamber (31) and the connection passage ...

SILENCER WITH A SHUNT RESONATOR

The invention relates to a silencer with a shunt resonator. Said shunt resonator (10) is formed by an outer housing volume which encompasses the sound-conducting channel (1) in a predetermined area. The sound-conducting channel (1) is connected to the shunt resonator (10) by openings (6). The openings in the sound-conducting channel (1) consist of tubular elements (6), preferably in a moulded part (5), extending from the sound-conducting channel (1) into the housing volume of the shunt resonator (10).

Schalldämpfer.

Schalldämpfer.

Schalldämpfer für in Rohrleitungen strömende Gase

Sound absorber for pulsatory gas burner - has branch Helmholtz resonator, annular multi-chamber resonator and absorbent jacket each end

The pulsating burner for a water boiler has a pulsatory reactor vessel (1) with a larger chamber (2) containing the gas burner (6) funnelling down to an outlet tube (4), and both the discharge tube and the air supply tube (5) carrying branch lines (17) leading to a Helm holts resonator designed to reduce the noise of the burner, by absorbing the fundamental frequencies. Preceding the upstream resonator and following the downstream resonator is a further multi-chamber resonator (18) built around the tube, to absorb further residual acoustic energy which was not absorbed by the other resonators, their volumes being less than the other resonators. Beyond these resonators, at the outermost ends of the tubes, is a layer of sound absorbing material (22).

Zyklon-Schalldämpfer mit angeschlossener Resonatorstufe

Silencieux

Schalldämpfer

Resonator

PROCEDURE FOR ADJUSTING A HELMHOLTZ-RESONATORS AS WELL AS HELMHOLTZ-RESONATOR FOR THE EXECUTION OF THE PROCEDURE.

Bei einem Verfahren zum Einstellen eines Helmholtz-Resonators (10), welcher wenigstens ein Resonatorvolumen (11) umfasst, das entlang einer Achse (29) über eine einen akustischen Widerstand aufweisende Verengung (12) an einen zu bedämpfenden Raum (13) angeschlossen ist, wird zur Einstellung des Helmholtz-Resonators (10) der akustische Widerstand der Verengung (12) verändert.

Turbolader mit Schalldämpfer.

Turbolader, mit einer Turbine zur Entspannung eines ersten Mediums und zur Gewinnung von Energie bei der Entspannung des ersten Mediums, und mit einem Verdichter zur Verdichtung eines zweiten Mediums unter Nutzung der in der Turbine gewonnen Energie, wobei mindestens ein strömungsführendes Element des Turboladers mit einem Schalldämpfer (1) versehen ist, wobei der jeweilige Schalldämpfer (1) eine Tragstruktur (3) mit einer Tragwandung (4) und mit an der Tragwandung (4) ausgebildeten Kammern (5) aufweist, wobei die Kammern (5) an einer von einem Strömungskanal (7) des Schalldämpfers (1) abgewandten Seite derselben durch die Tragwandung (4) begrenzt sind, und wobei die Kammern (5) an einer dem Strömungskanal (7) des Schalldämpfers (1) zugewandten Seite derselben von einer Abdeckung (8) begrenzt sind, wobei die Abdeckung (8) mindestens zwei fest miteinander verbundene, gitterförmige Lagen (9, 10, 11) mit unterschiedlichen Maschenweiten aufweist.

Turbocharger.

Turbolader, mit einer Turbine zur Entspannung eines ersten Mediums und zur Gewinnung von Energie bei der Entspannung des ersten Mediums, und mit einem Verdichter zur Verdichtung eines zweiten Mediums unter Nutzung der in der Turbine gewonnen Energie, wobei mindestens ein strömungsführendes Element des Turboladers mit einem Schalldämpfer (1) versehen ist, wobei der jeweilige Schalldämpfer (1) eine Tragstruktur (3) mit einer Tragwandung (4) und mit an der Tragwandung (4) ausgebildeten Kammern (5) aufweist, wobei die Kammern (5) an einer von einem Strömungskanal (7) des Schalldämpfers (1) abgewandten Seite derselben durch die Tragwandung (4) begrenzt sind, und wobei die Kammern (5) an einer dem Strömungskanal (7) des Schalldämpfers (1) zugewandten Seite derselben von einer Abdeckung (8) begrenzt sind, wobei die Abdeckung (8) mindestens zwei fest miteinander verbundene, gitterförmige Lagen (9, 10, 11) mit unterschiedlichen Maschenweiten aufweist.

Kühlgerät mit einem Schalldämpfer im Wärmepumpenkreislauf.

Ein Kühlgerät, insbesondere ein Kühlschrank oder ein Tiefkühlschrank, umfasst einen Nutzraum (7) und eine Wärmepumpe mit einem im Wärmepumpenkreislauf zirkulierenden Kältemittel. Zwischen Kompressor (1) und Verflüssiger (2) ist ein Schalldämpfer (8) angeordnet, welcher als A/4-Resonator ausgestaltet ist.

For vehicle internal combustion engine exhaust system

Silencer

Silencer

Comprising silencer of the resonators of Helmholtz in derivation

Improvements brought to the silencers usually used to deaden the noises of exhaust

ACOUSTIC VOLUME FOR AN EXHAUST LINE OF A MOTOR VEHICLE

L'invention concerne un volume acoustique (2 comportant une chambre close (3) et un col de liaison (4), la chambre close (3) pouvant s'ouvrir à une conduite d'échappement (5) seulement par le col de liaison (4), le volume (5) étant réalisé en tout ou partie en au moins un matériau composite.

Silencer for combustion or spark-ignition engine

MUFFLER

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

ADJUSTABLE DEVICE Of ATTENUATION OF the NOISES EMITTED BY GASES IN CIRCULATION Of an ENGINE OF MOTOR VEHICLE

Muffler for vehicle

Noise damping arrangement for IC engine exhaust gas system

The arrangement comprises at least one pipe (3) which is connected to at least two volumes or openings, e.g. in the form of a noise damper (1) and a channel/pipe outlet (4), in such a way that multiples of waves can arise in the pipe (3) between both volumes/openings. At least one tube is arranged in the pipe, the tube one end comprising an inlet and its other end being wholly or partly closed. The tube inlet is arranged in or near some of the pipe noise pressure areas (P1 max, P2 max) in order to damp at least a noise pressure max.

ANORDNING FOER LJUDDAEMPNING I ETT KANALSYSTEM, I SYNNERHET I ETT AVGASSYSTEM FOER FOERBRAENNINGSMOTORER

EXHAUST SILENCER ARRANGEMENT

The invention concerns an exhaust silencer arrangement with a transverse exhaust silencer (1) in a four-chamber type of construction, in particular for very small passenger-transporting motor vehicles, with a 3-cylinder rear-mounted engine and an exhaust gas turbocharger. The silencer (1) comprises a housing (4) which is composed of two half shells (2, 3) and accommodates a catalyst module (5) in an integrated manner. The catalyst module (5), which does not have its own housing, forms a silencer system partition which divides the silencer (1) into a 3-pot main chamber (6, 7, 8) and an additional chamber (9) which is in particular a resonator chamber and communicates with the main chamber via connection ducts (10) formed in the half-shell housing (4).

STAMPED-FORMED MUFFLER APPARATUS AND ASSEMBLY PROCESS

A muffler (14) is provided for attenuating noise produced by a vehicle engine. The muffler (14) includes a muffler body (10) and a pair of end caps (12). Muffler body (10) is formed from a single sheet (16) of material and includes first and second outer shells (26, 28) and first and second inner plates (30, 32). First and second inner plates (30, 32) are folded relative to one another along a fold line (50). First and second outer shells (26, 28) are folded along respective fold lines (48, 52) relative first and second inner plates (30, 32). After folding, first outer shell (26) and first inner plate (30) cooperate to define a first subchamber (164) therebetween; second outer shell (28) and second inner plate (32) cooperate to define a second subchamber (166) therebetween; and first and second inner plates (30, 32) cooperate to define a baffle (168) defining an exhaust passage (138) extending through muffler body (10).

Muffler

A muffler for an internal combustion engine for effectively damping noise over a wide frequency range, from low frequency noise to high frequency noise. An absorber packed type muffler adapted to absorb noise by a sound absorbing material is inserted in and fixed to a housing which has a bore or bores thereinside, thereby forming one of a pipe inserted type muffler, a resonance type muffler and an interference type muffler to attain combined characteristics of both the types of mufflers.

Exhaust pipe part and exhaust apparatus for internal combustion engine

A tail pipe part includes a tail pipe to constitute part of the tail pipe, and has a hollow member connected with the tail pipe in axial alignment with the tail pipe to be positioned within an area covering a node portion in a sound pressure distribution of an air column resonance caused in the tail pipe, and a short pipe included in the hollow member and having a predetermined length to extend in the axial direction of the tail pipe, the short pipe having an open end at the upstream end thereof and a closed end at the downstream end thereof, the closed end being constituted by a bottom plate positioned at almost the same position as that of the node portion in the sound pressure distribution of a standing wave formed by the air column resonance caused in the tail pipe.

ACOUSTIC RESONATOR

The resonator is configured to attenuate the noise in a duct delimiting an internal channel for the flow of a fluid according to a reference axis, of the type including an annular compartment configured to extend around the channel and provided with at least one orifice forming a neck for communication with the flow channel so as to form a resonance chamber. Accordingly, the compartment has an inner structure with a geometry shaped so as to produce a revolution annular asymmetry of the resonance chamber about the reference axis, adapted to generate a phase shift of an acoustic pressure wave reflected inside the chamber relative to an acoustic pressure wave incident from the main flow.

Multi-cylinder internal combustion engine, vehicle, marine vessel, and exhausting method for multi-cylinder internal combustion engine

A multi-cylinder internal combustion engine capable of decreasing the pressure or temperature of exhaust gas. The internal combustion engine includes at least two cylinders and an exhaust path. The exhaust path includes a convergent-divergent nozzle and an exhaust merging section provided upstream with respect to an upstream end of the divergent section arranged to connect only exhaust ports of combustion chambers for which the opening periods do not overlap. A shock wave propagating in a merging upstream section is branched at a connection section, and the branched shock wave is reflected by an exhaust valve of cylinder and collides against the exhaust gas. In accompaniment with the passage of the exhaust gas having the pressure increased by the shock wave through the convergent-divergent nozzle, a new shock wave propagating in a downstream direction in the exhaust path is generated and also an expansion wave propagating in an upstream direction in the exhaust path is generated. Thus, ...

Exhaust muffler

An exhaust muffler ( 1 ) invention includes an entry chamber ( 9 ), a resonator chamber ( 15 ), and a baffle chamber ( 23 ) positioned in serial order between an exhaust gas inlet ( 3 ) that lets exhaust gas into the entry chamber and an exhaust gas outlet ( 5 ) from the baffle chamber that lets the exhaust gas exit to the exterior. A pass-through tube ( 21 ) provides an exhaust gas passage extending from the first entry chamber, through the resonator chamber and into the baffle chamber; and a baffle system ( 2,4,6, 8, 10, 12 & 14 ) located in the baffle chamber, contains a plurality of baffles positioned between the resonator chamber at one end and said exhaust gas outlet at the other end for reflecting sound admitted into said baffle chamber via said pass-through tube, whereby interference patterns of reflected sound are produced that lessen the intensity of the sound that exits along with exhaust gas from said outlet tube. In accordance with an additional aspect to the invention, the ...

Soundproofing device for transmission

A soundproofing device for a transmission according to the present disclosure is provided to transmit the power of one or more prime movers (for example, internal combustion engine and electric motor). The soundproofing device includes a Helmholtz resonator including: a wall that forms a Helmholtz resonance chamber; and an opening formed in the wall so as to cause the Helmholtz resonance chamber to communicate with the outside of the Helmholtz resonance chamber. The wall includes a transmission case that accommodates the transmission and a housing of a component mounted on the transmission (for example, PCU housing). The Helmholtz resonance chamber is formed between the transmission case and the housing.

ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ, ТРАНСПОРТНОЕ СРЕДСТВО, МОРСКОЕ СУДНО И СПОСОБ ПОДАЧИ ВТОРИЧНОГО ВОЗДУХА ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к многоцилиндровым двигателям внутреннего сгорания, которые могут быть использованы на транспортных средствах, в частности на морских судах. Двигатель внутреннего сгорания содержит камеру сгорания, имеющую выпускное отверстие, выпускной клапан для открытия или закрытия выпускного отверстия, выпускное устройство, имеющее выпускной канал для направления отработанного газа, выпускаемого из камеры сгорания, через выпускное отверстие и систему подачи вторичного воздуха для подачи воздуха в выпускное устройство. Выпускное устройство содержит сужающуюся секцию, имеющую площадь поперечного сечения для потока, меньшую на ее выходном конце, чем на ее входном конце, расширяющуюся секцию, расположенную дальше по потоку относительно сужающейся секции и имеющую площадь поперечного сечения для потока, большую на ее выходном конце, чем на ее входном конце, и ответвленную секцию для ответвления скачка уплотнения, распространяющегося в направлении потока в выпускном канале с более высокой ...

ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ, ТРАНСПОРТНОЕ СРЕДСТВО, МОРСКОЕ СУДНО И СПОСОБ ОЧИСТКИ ОТРАБОТАННОГО ГАЗА ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Двигатель внутреннего сгорания 1 включает в себя сужающуюся, расширяющуюся и ответвленную секции 32, 33 и 21. Ответвленная секция 21 ответвляет скачок 35 уплотнения, распространяющийся в направлении по потоку с более высокой скоростью, чем отработанный газ 36, проходящий к выпускному каналу 16 из камеры сгорания 10, когда открыт выпускной клапан 9, из ближней по потоку относительно расширяющейся секции 33 части выпускного канала 16 и обеспечивает распространение скачка 35 уплотнения назад в выпускной канал 16. Отработанный газ 36 должен проходить сужающуюся секцию 32 и сталкиваться со скачком 35 уплотнения между ответвленной секцией 21 и расширяющейся секцией 33, чтобы таким образом повысить давление отработанного газа 36 в сужающейся секции 32. Отработанный газ 36 должен проходить расширяющуюся секцию 33, чтобы генерировать новый скачок уплотнения и таким образом уменьшить температуру отработанного газа. Катализатор устройства для очистки отработанного газа расположен в части выпускного ...

ДЕМПФЕР ДЛЯ ГАЗОВОЙ ТУРБИНЫ

FIELD: machine building. SUBSTANCE: damper contains a casing, main manhole going from casing, separating plate, internal manhole with first end and second end, and deviating flow element. The separating plate is located in the casing with possibility of the casing division to the first cavity and second cavity. The internal manhole passes through the separating plate to connect the first cavity and the second cavity. The first end of the internal manhole is in the first cavity, and the second end is in the second cavity. The deviating flow element is located proximal to the second end of the internal manhole with possibility to deviate the flow passing through the internal manhole. EFFECT: damper stable operation is ensured. 6 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 558 314 C1 (51) МПК F23M 20/00 (2014.01) F02C 7/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014118926/02, 12.05.2014 (24) Дата начала отсчета срока действия патента: 12.05.2014 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): БОТИН,Мирко Рубен (CH), НУАРЭ,Николя (CH), ШУЕРМАНС,Бруно (CH) 24.05.2013 EP 13169241.0 (45) Опубликовано: 27.07.2015 Бюл. № 21 2 5 5 8 3 1 4 (56) Список документов, цитированных в отчете о поиске: US 2005103018 A1, 19.05.2005. SU 1695060 A1, 30.11.1991. EP 1568869 A1, 31.08.2005 2 5 5 8 3 1 4 R U Стр.: 1 разделительную пластину для соединения первой полости и второй полости. Первый конец внутренней горловины остается в первой полости, а второй конец - во второй полости. Отклоняющий поток элемент расположен проксимально ко второму концу внутренней горловины с возможностью отклонения потока, проходящего через внутреннюю горловину. В результате обеспечивается стабильная работа демпфера. 5 з.п. ф-лы, 5 ил. C 1 C 1 Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) ДЕМПФЕР ДЛЯ ГАЗОВОЙ ТУРБИНЫ (57) Реферат: Изобретение ...

EIN SCHALLDÄMPFER FÜR ANSAUGSYSTEM ODER ABGASSYSTEM

SCHALLDÄMPFER MIT EINEM NEBENSCHLUSSRESONATOR

Abgasvorrichtung für eine Brennkraftmaschine

Die vorliegende Erfindung betrifft eine Abgasvorrichtung (2) für eine Brennkraftmaschine (3), vorzugsweise eines Kraftfahrzeugs (1), der einen Abgasstrang (5) aufweist, der zumindest in einem hinteren Abschnitt X zwei Abgasleitungen (11) aufweist, die jeweils schallübertragend mit zumindest einem zugehörigen akustischen Aktor (12) verbunden sind. Ein verbessertes akustisches Verhalten bzw. eine erhöhte Anzahl der von außen hörbaren Geräuschen ist dadurch gewährleistet, dass die Abgasleitungen (11) ungleich ausgebildet sind und/oder dass die Aktoren (12) individuell ansteuerbar sind. Die Erfindung betrifft zudem ein Verfahren zur Steuerung der Aktoren (12) der Abgasvorrichtung (2) wobei eine Steuereinrichtung (25) die Aktoren (12) individuell ansteuert, womit insbesondere unterschiedliche akustische Signale (23) der jeweiligen Aktoren (12) erzeugt werden können. Schließlich betrifft die Erfindung ein Kraftfahrzeug (1) mit einer derartigen Abgasvorrichtung (2), deren akustische Aktoren (12 ...

Abgasanlage für eine Brennkraftmaschine

Abgasanlage (1) für eine Brennkraftmaschine, mit einer in einen ersten Schalldämpfer (6) einmündenden ersten Abgasleitung (4) und einer strömungstechnisch parallel zu der ersten Abgasleitung (4) vorgesehenen, in einen zweiten Schalldämpfer (7) einmündenden zweiten Abgasleitung (5), wobei die Abgasleitungen (4, 5) stromaufwärts des jeweiligen Schalldämpfers (6, 7) an einem Abzweig (3) an eine gemeinsame Abgaszuführleitung (2) angeschlossen sind, wobei in der ersten Abgasleitung (4) stromaufwärts des ersten Schalldämpfers (6) ein Stellventil (12) angeordnet ist, dadurch gekennzeichnet, dass der Abzweig (3) in einem weiteren Schalldämpfer (10) vorliegt, wobei die gemeinsame Abgaszuführleitung (2) in den weiteren Schalldämpfer (10) einmündet und stromabwärts die beiden Abgasleitungen (4, 5) aus dem weiteren Schalldämpfer (10) ausmünden, und dass strömungstechnisch zwischen dem Abzweig (3) und dem Stellventil (12) eine Dämpfungseinrichtung (13) zur Dämpfung von Abgasresonanzschwingungen vorgesehen ...

IC engine exhaust system - has longitudinal housing without transverse baffles, but gas flow directed to exchange heat with cooler downstream gas

The system is intended for conducting exhaust gas into the open whilst removing environmental pollutants such as noise heat and harmful components and improving engine performance. It comprises a single or double-walled longitudinal housing (56) without transverse partitions which is secured between end covers (60 70) having a baffle (17) to form the necessary chambers and to direct the gas flow (through 10 16). This flow is so directed that a temp drop is achieved by heat exchange with a cooler medium through the wall (51) of the hollow housing profile and/or through the wall into the outlet section (18).

Schalldämpfer und Fahrzeugmotor umfassend einen Schalldämpfer

Die vorliegende Erfindung beschreibt einen Schalldämpfer, der ein Außengehäuse und ein zentrales perforiertes Rohr, durch welches Luft strömt, umfasst. Der Schalldämpfer umfasst ferner eine zusätzliche, zwischen dem zentralen perforierten Rohr und dem Außengehäuse angeordnet perforierte Struktur, und eine erste Kammer ist zwischen dem zentralen perforierten Rohr und der zusätzlichen perforierten Struktur gebildet, und die zusätzliche perforierte Struktur ist derart konfiguriert, dass mindestens eine zweite Kammer gebildet ist, die mindestens teilweise radial außerhalb der ersten Kammer angeordnet ist, wobei die zweite Kammer mit der ersten Kammer durch Perforationen in Verbindung steht. Die vorliegende Erfindung betrifft ferner einen Fahrzeugmotor mit dem Schalldämpfer. Der Schalldämpfer der vorliegenden Erfindung ist von kompakter Struktur und hat eine bessere Breitbandschalldämpfungswirkung.

Sound dampener consists of a pipe with outer casing and inner pipes, intermediate walls, and slits

The damper consists of a pipe with outer casing (1) in one piece and containing one or more constrictions so as to produce one or more intermediate walls (3) of varying widths. An inner pipe (4) is inserted sideways into the outer casing. The slits (5) are positioned so that openings in the outer casing are opposite overlaps in the pipe.

Heat-exchange and noise-reduction panel for a propulsion assembly

Heat-exchange and noise attenuation panel 1 for a propulsion assembly (e.g. aircraft gas turbine engine) comprises a cellular structure 3 comprising longitudinally oriented structural walls 32, covered by a perforated plate 2 comprising a plurality of through openings 21. The cavities 31 between the walls 32 define Helmholtz resonators, the through apertures forming necks 21 of the resonators 31. Fluid circulation means 6 (e.g. for oil coolant / lubricant) comprise channels or grooves 6 (6A, 6B, see figures 6B, 7B, 8) formed at least in part in thickened ends of the walls 32 (e.g. flared wall part or bevel 7) on the same side as the perforated plate 2, and/or at least in part in regions of the perforated plate 2, (2A, 2A). The fluid circulation grooves 6 may be covered with attachment elements - inserts 8 or perforated panels (2A, 2A). Preferably the acoustic attenuation system with integrated fluid circulation channels 6 for heat exchange may have a support 4 (e.g. gas turbine air inlet ...

A SOUND ATTENUATOR

Heat-exchange and noise-reduction panel for a propulsion assembly

Apparatus for modifying acoustic transmission

Silencer for gaseous currents

... 1,089,221. Exhaust silencers. WALKER MANUFACTURING CO. Oct. 22, 1964 [Oct. 24, 1963], No.43118/64. Heading F1B. A silencer comprises a gaseous flow tube 7 surrounded by an elongated shell 3 which contacts the tube at opposite sides 17 to form two resonance chambers 9 connected to the tube through perforations 13. The tube 7 may be offset so that one chamber 9 is bigger than the other. One of the chambers is preferably split up into a series of smaller resonance chambers 19 by pinching in the outer shell at 21. The shell 3 may be formed double-walled by wrapping a sheet upon itself; alternatively the two walls may be formed of separate tubes, the inner being of stainless steel and the outer of aluminized steel. In a modification, Fig. 5 (not shown) the outer shell is of greater height than the tube and is dished inwardly at (111), (113), to grip the tube and thereby form the resonance chambers (103), (105).

Silencer for internal-combustion engines

... 1,094,213. Exhaust silencer. WALKER MANUFACTURING CO. Oct. 23, 1964 [Oct. 30, 1963], No. 33120/67. Divided out of 1,094,211. Heading F1B. The subject matter is identical with that of Specification 1, 094, 211 but the claims relate to the construction of the silencer (11), Fig. 1 (not shown).

DEVICE TO THE REDUCTION OF SOUND EMISSIONS AND PROCEDURE FOR THE PRODUCTION OF SUCH A DEVICE

MUFFLER EMPLOYMENT

REACTOR FOR THE CATALYTIC CLEANING OF INCINERATION GASES

DEVICE AND PROCEDURE FOR THE SOUND PROOFING IN A TRANSPORT SYSTEM FOR GASEOUS MATERIALS AND APPLICATION OF SUCH A DEVICE IN A WASTE GAS SYSTEM OF A SHIP

SILENCER

Silencer and air inlet system comprising silencer

Muffler   For An Exhaust Line Of An Internal Combustion Engine

SILENCER

Silencer for the pulsatory gas flow

Quiet device for pulsatory flow of gases

Exhaust pipe part and exhaust apparatus for internal combustion engine

A tail pipe part includes a tail pipe to constitute part of the tail pipe, and has a hollow member connected with the tail pipe in axial alignment with the tail pipe to be positioned within an area covering a node portion in a sound pressure distribution of an air column resonance caused in the tail pipe, and a short pipe included in the hollow member and having a predetermined length to extend in the axial direction of the tail pipe, the short pipe having an open end at the upstream end thereof and a closed end at the downstream end thereof, the closed end being constituted by a bottom plate positioned at almost the same position as that of the node portion in the sound pressure distribution of a standing wave formed by the air column resonance caused in the tail pipe.

Variable Frequency Helmholtz Resonator

A variable frequency Helmholtz resonant cavity includes a Helmholtz resonant cavity body, two Helmholtz resonant cavity pipes with different cross-sectional areas and lengths and a control valve plate. The Helmholtz resonant cavity body is connected with the main pipe of the intake system via the Helmholtz resonant cavity pipes, and the control valve plate is disposed at the location where the two Helmholtz resonant cavity pipes meet. 1. A variable frequency Helmholtz resonant cavity resonator , comprising:a Helmholtz resonant cavity body enclosing a resonant cavity therein;two Helmholtz resonant cavity pipes;wherein each pipe connected at first end to an automotive intake system,wherein each pipe is connected at an opposing second end to the resonant cavity in the body;wherein a first one of said two Helmholtz resonant cavity pipes has a first length along its length from its first end to its opposing second end;wherein a second one of said two Helmholtz resonant cavity pipes has a second length along its length from its first end to its opposing second end;wherein the first one of said two Helmholtz resonant cavity pipes has an interior air channel with a first cross sectional area;wherein the second one of said two Helmholtz resonant cavity pipes has an interior air channel with a second cross sectional area;wherein said first and second cross sectional areas are different;wherein said first and second lengths are different;a control valve plate arranged at the second ends of the first and second Helmholtz resonant cavity pipes, the control valve plate operable between a first position and a second position;wherein in the first position, the control valve plate closes the air channel of the first Helmholtz resonant cavity pipe and opens the air channel of the second Helmholtz resonant cavity pipe to communicate with the resonant cavity of the Helmholtz resonant cavity body;wherein in the second position, the control valve plate closes the air channel of the ...

Device and method for manipulating the exhaust outlet noise of a motor vehicle

A device for manipulating the exhaust outlet noise of a motor vehicle, having an exhaust flap which can be positioned in an exhaust pipe and which can be displaced in oscillatory fashion about an exhaust flap basic position in a defined angle range about the exhaust flap basic position in order to manipulate the exhaust outlet noise, wherein the exhaust flap basic position can be actively adjusted as a function of an engine rotational speed and/or an engine load, and wherein the angle range can be actively adjusted as a function of a frequency to be eliminated or attenuated, or a frequency to be generated or enhanced, of the exhaust outlet noise.

HELMHOLTZ MUFFLER FOR VEHICLE

A Helmholtz muffler for a vehicle may include a muffler housing having an internal space divided into a plurality of expansion chamber; a resonance chamber formed hermetically in a vehicle body member; and a connection tube configured to be connected to one of the expansion chambers of the muffler housing and to the resonance chamber. 1. A Helmholtz muffler for a vehicle , the muffler comprising:a muffler housing having an internal space divided into a plurality of expansion chamber;a resonance chamber formed hermetically in a vehicle body member; anda connection pipe connected to at least one of the plurality of expansion chambers of the muffler housing and to the resonance chamber.2. The Helmholtz muffler for the vehicle of claim 1 , wherein partitions by which a capacity of the resonance chamber is determined are disposed at a first side and a second side of the resonance chamber claim 1 , respectively claim 1 , and the partitions are integrally secured to the vehicle body member to form the resonance chamber.3. The Helmholtz muffler for the vehicle of claim 1 , wherein the connection pipe is connected to and is in fluidic communication with an expansion chamber to which exhaust gas is lastly discharged from the muffler housing claim 1 , among the plurality of expansion chambers.4. The Helmholtz muffler for the vehicle of claim 1 , wherein the connection pipe is a bellows pipe which is configured to be movable according to movement of the muffler case.5. The Helmholtz muffler for the vehicle of claim 4 , wherein an upper end portion and a lower end portion of the bellows pipe are secured to the resonance chamber in the vehicle body member and the muffler housing claim 4 , respectively.6. The Helmholtz muffler for the vehicle of claim 1 , further including:a first baffle and a second baffle mounted in the muffler housing in a longitudinal direction of the muffler housing and spaced from each other to form a space between a first side wall of the muffler housing ...

ANTI-RESONANCE MUFFLER

An apparatus and method are provided for an anti-resonance muffler to attenuate vehicle exhaust system resonance. The anti-resonance muffler comprises a chamber having a specific volume, a port having a specific volume, an exhaust tube, an outlet and an inlet which is connected to a vehicle exhaust system. The combination of the chamber and port create a Helmholtz resonator device that acts to phase-cancel a narrow range of frequencies that are generated by the vehicle exhaust system. The chamber and port are mounted radially relative to the exhaust tube. 1. An anti-resonance muffler to attenuate vehicle exhaust system resonance , comprising a chamber with a specific volume , a port with a specific volume , an exhaust tube , an outlet and an inlet which is connected to the vehicle exhaust system of interest.2. The anti-resonance muffler of wherein the chamber and port create a Helmholtz resonator.3. The anti-resonance muffler of wherein the chamber and port are mounted radially relative to the exhaust tube.4. The anti-resonance muffler of wherein the chamber and port are in fluid communication with the vehicle exhaust system of interest.5. A method for attenuating vehicle exhaust system resonance claim 1 , comprising:a chamber and port having suitable volumes for use in an anti-resonance muffler;an anti-resonance muffler tuned to a suitable frequency to attenuate vehicle exhaust system resonance;a chamber and port in fluid communication with the vehicle exhaust system of interest;and a chamber and port mounted radially relative to an exhaust tube.6. The method of claim 5 , wherein selecting the tuning frequency of the anti-resonance muffler further comprises accounting for effects due to an operating temperature of the vehicle exhaust system of interest.7. The method of claim 5 , further comprising ensuring an anti-resonance muffler tuned frequency is substantially equal to an excitation frequency of the vehicle exhaust system of interest so as to optimize ...

Exhaust Gas System for an Internal Combustion Engine and Method for Operating the Exhaust Gas System

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. 1. An exhaust gas system for an internal combustion engine having at least a first and a second cylinder , the exhaust gas system comprising:a first exhaust pipe assigned to the first cylinder;a second exhaust pipe assigned to the second cylinder;a first muffler assigned to the first exhaust pipe;a second muffler assigned to the second exhaust pipe;a first muffling pipe branching off from the first exhaust pipe upstream of a first shut-off member;a second muffling pipe branching off from the second exhaust pipe upstream of a second shut-off member, whereinthe first muffling pipe is guided through the first muffler and leads into the second exhaust pipe downstream of the second shut-off member, andthe second muffling pipe is guided through the second muffler and leads into the first exhaust pipe downstream of the first shut-off member.2. The exhaust gas system according to claim 1 , further comprising:a common housing in which the first and second mufflers are arranged.3. The exhaust gas system according to claim 2 , further comprising:a first resonator chamber assigned to the first muffling pipe; anda second resonator chamber assign to the ...

PROPULSION FLOW PATH DUCT SYSTEMS AND METHODS

A flow path duct system for a propulsion system of an aircraft includes a base defining a flow surface. The base has an internal surface and an external surface. A plurality of perforations are formed through the base between the internal surface and the external surface. A plurality of supports define a plurality of cavities. The plurality of supports extend outwardly from the external surface of the of the base. One or more of the plurality of cavities are in fluid communication with the one or more of the plurality of perforations. A backing surface is secured to the plurality of supports. The plurality of supports are disposed between the base and the backing surface. The one or more of the plurality of cavities are in fluid communication with an internal volume defined by the internal surface of the base through the one or more of the plurality of perforations. The base, the plurality of supports, and the backing surface can be integrally formed together as a monolithic, load-bearing structure. 1. A flow path duct system for a propulsion system of an aircraft , the flow path duct system comprising:a base defining a flow surface, wherein the base has an internal surface and an external surface, wherein a plurality of perforations are formed through the base between the internal surface and the external surface;a plurality of supports defining a plurality of cavities, wherein the plurality of supports extend outwardly from the external surface of the of the base, and wherein one or more of the plurality of cavities are in fluid communication with one or more of the plurality of perforations; anda backing surface secured to the plurality of supports,wherein the plurality of supports are disposed between the base and the backing surface, andwherein the one or more of the plurality of cavities are in fluid communication with an internal volume defined by the internal surface of the base through the one or more of the plurality of perforations.2. The flow path duct ...

PNEUMATIC TOOL EXHAUST MUFFLER

A high pass muffler for a pneumatic tool that allows for high pass through of exhaust air. The muffler dampens noise generated by the exhaust air by incorporating channels in walls of the muffler that act as Helmholtz resonators. 1. A high pass muffler disposed in an air exhaust passage of a pneumatic tool , comprising:an outer body including a channel having a terminal end; andan inner body disposed within the outer body and including an aperture located proximate to the terminal end.2. The muffler of claim 1 , wherein the muffler is tuned to resonate at any one of a quarter wavelength claim 1 , a half wavelength claim 1 , or a full wavelength of a target frequency.3. The muffler of claim 2 , wherein the target frequency is in a range from 50 Hz to 10 kHz.4. The muffler of claim 1 , wherein the channel follows a circuitous path.5. The muffler of claim 4 , wherein the circuitous path has angular corners.6. The muffler of claim 1 , wherein the channel follows a curved path.7. The muffler of claim 1 , wherein the inner body is assembled from two halves.8. The muffler of claim 1 , wherein the inner body is interference fit with the outer body.9. The muffler of claim 1 , wherein a cross-section of the aperture has any one of a square claim 1 , round claim 1 , polygon claim 1 , or amorphous shape.10. The muffler of claim 1 , wherein a portion of the muffler protrudes beyond the air exhaust passage.11. The muffler of claim 1 , wherein the outer body has a shape that corresponds to an inner surface of the air exhaust passage.12. The muffler of claim 1 , wherein the outer body is assembled from two halves.13. A pneumatic tool comprising:an air intake passage;an air exhaust passage; anda muffler disposed in the air exhaust passage, the muffler including an outer body including a channel having a terminal end and an inner body coupled to the outer body and including an aperture located proximate to the terminal end.14. The tool of claim 13 , wherein the muffler is tuned to ...

EXHAUST GAS MUFFLER

An exhaust gas muffler of an internal combustion engine, including a muffler housing having an exhaust gas inlet and an exhaust gas outlet and including a first Helmholtz resonator made of a first housing portion that delimits a first Helmholtz volume and includes a first coupling pipe. At least one second Helmholtz resonator is provided made of a second housing portion that delimits a second Helmholtz volume and includes a second coupling pipe via which the second Helmholtz volume can be coupled to an exhaust gas flow A of the exhaust gas inlet. The second coupling pipe is arranged at least partly within the first coupling pipe, and both coupling pipes delimit an annular gap R via which the first Helmholtz volume can be coupled to the exhaust gas flow A. 12. An exhaust gas muffler of an internal combustion engine , comprising: a muffler housing having an exhaust gas inlet and an exhaust gas outlet and comprising a first Helmholtz resonator () , made of a first housing portion that delimits a first Helmholtz volume and comprises a first coupling pipe , wherein at least one second Helmholtz resonator is provided made of a second housing portion that delimits a second Helmholtz volume and comprises a second coupling pipe via which the second Helmholtz volume can be coupled to an exhaust gas flow A of the exhaust gas inlet ,wherein the second coupling pipe is arranged at least partly within the first coupling pipe, and both coupling pipes delimit an annular gap R via which the first Helmholtz volume can be coupled to the exhaust gas flow A.2. The exhaust gas muffler according to claim 1 , wherein the second coupling pipe is passed through the first housing portion and both housing portions or both Helmholtz volumes are arranged one after another in relation to a direction RK of the second coupling pipe.3111. The exhaust gas muffler according to claim 1 , wherein the annular gap R has an inlet opening E with a normal N claim 1 , wherein the normal N with a direction of ...

Heat-exchange and noise-reduction panel for a propulsion assembly

Heat-exchange and noise-reduction panel for a propulsion assembly, in particular for an aircraft, the panel comprising: a perforated plate comprising a plurality of through-openings; a cellular structure comprising longitudinally oriented structural walls covered by said perforated plate and comprising, between said walls, cavities that define Helmholtz resonators, said through-openings forming necks of said resonators; and means for the circulation of fluid, for example oil, at said perforated plate, wherein said fluid circulation means comprise channels that are formed at least in part in thickened ends of said walls on the same side as said perforated plate, and/or at least in part in regions of the perforated plate situated in the longitudinal extension of said thickened ends.

Exhaust Device With Noise Suppression System

An exhaust device includes a housing, first and second pipes, and a spacer. The first and second pipes are at least partially disposed within the housing. The first and second pipes include respective first and second surfaces. A portion of the second pipe is disposed inside the first pipe. The first and second surfaces cooperate to define an annular volume into which the spacer is disposed to prevent direct communication between the first and second pipes. One of the first and second pipes is fluidly connected to an exhaust gas inlet. The other of the first and second pipes is fluidly connected to an exhaust gas outlet. One of the first and second surfaces defines a radial indentation. The other of the first and second surfaces defines a radial protrusion. The spacer is disposed at least partially within the radial indentation and is in direct communication with the radial protrusion.

TUNABLE SOUND ATTENUATING MODULES

Aspects of the present disclosure include a casing comprising an air inlet and an air outlet, a fan configured to move air from the air inlet to the air outlet, and a tunable sound attenuating module having an opening at a first end of the tunable sound attenuating module, a cavity, and a back wall at a second end of the tunable sound attenuating module, wherein: the tunable sound attenuating module is oriented such that the back wall is closer to the fan than the opening, and a length of tunable sound attenuating module is substantially one fourth of the acoustic wavelength of a sound generated by the fan. 1. An air handling unit , comprising:a casing comprising an air inlet and an air outlet;a fan configured to move air from the air inlet to the air outlet; and the first end of the tunable sound attenuating module is opposed to the second end of the tunable sound attenuating module;', 'the tunable sound attenuating module is oriented such that the back wall is closer to the fan than the opening; and', 'a length of the tunable sound attenuating module is substantially one fourth of the acoustic wavelength of a sound generated by the fan., 'a tunable sound attenuating module having an opening at a first end of the tunable sound attenuating module, a cavity, and a back wall at a second end of the tunable sound attenuating module, wherein2. The air handling unit of claim 1 , wherein the tunable sound attenuating module is oriented such that the sound is propagating perpendicular to the opening.3. The air handling unit of claim 1 , further comprising a cooling coil configured to cool the air moved from the air inlet to the air outlet.4. The air handling unit of claim 1 , wherein the tunable sound attenuating module is disposed between the fan and the air outlet.5. The air handling unit of claim 1 , further comprises a second tunable sound attenuating module disposed substantially at the air inlet.6. The air handling unit of claim 1 , further comprises a second tunable ...

METHOD AND APPARATUS TO ENABLE PACKAGE SPACE REDUCTION IN A VEHICLE EXHAUST SYSTEM

A vehicle exhaust system includes a hot end having one or more hot end exhaust components that treat emissions generated by an engine and a cold end that includes at least one cold end component that attenuates noise. At least one acoustic volume is in parallel or serial to the hot end to further attenuate noise. 1. A vehicle exhaust system comprising:a hot end including one or more hot end exhaust components that treat emissions generated by an engine;a cold end that includes at least one cold end component that attenuates noise; andat least one acoustic volume in parallel or serial to the hot end to attenuate noise.2. The vehicle exhaust system according to claim 1 , wherein the hot end components include at least one of a three-way catalyst claim 1 , selective catalytic reduction catalyst claim 1 , oxidation catalyst claim 1 , or particulate filter.3. The vehicle exhaust system according to claim 2 , wherein the at least one acoustic volume is arranged in parallel with exhaust flow and comprises an airtight and sealed cavity.4. The vehicle exhaust system according to claim 2 , wherein the at least one acoustic volume is arranged in parallel with exhaust flow and is located within a catalyst or filter housing.5. The vehicle exhaust system according to claim 2 , wherein the at least one acoustic volume is arranged in parallel with exhaust flow and is located within a vehicle frame component.6. The vehicle exhaust system according to claim 2 , wherein the at least one cold end component comprises at least one of a valve claim 2 , resonance free pipe claim 2 , or active noise cancellation.7. The vehicle exhaust system according to claim 6 , wherein the at least one cold end component comprises only one valve.8. The vehicle exhaust system according to claim 7 , wherein the at least one cold end component additionally comprises the resonance free pipe.9. The vehicle exhaust system according to claim 7 , wherein the at least one acoustic volume in the hot end comprises ...

TUNABLE RESONATOR

The gas turbine engine includes a fluid system fluidly connecting at least two components of the gas turbine engine, and a tunable resonator in fluid flow communication with the fluid system. The tunable resonator has a resonating volume that varies as a function of a volume of an inflatable member located inside the tunable resonator. The inflatable member having a means for varying the volume of the inflatable member, to thereby tune the resonating volume to a selected frequency of pressure fluctuations or acoustic waves within the fluid system. 1. A gas turbine engine comprising , in serial flow communication , a compressor , a combustor , and a turbine , the gas turbine engine further having a fluid system fluidly connecting at least two components of the gas turbine engine and including a tunable resonator in fluid flow communication with the fluid system , the tunable resonator defining an axial direction and a radial direction , the tunable resonator having a resonating volume that varies as a function of a volume of an inflatable member located inside the tunable resonator , the inflatable member having a means for varying the volume , the inflatable member thereby tuning the resonating volume to a selected frequency of pressure fluctuations or acoustic waves within the fluid system.2. The gas turbine engine according to claim 1 , wherein the resonating volume varies inversely to the volume of the inflatable member.3. The gas turbine engine according to claim 1 , wherein the inflatable member comprises two inflatable sub-members claim 1 , the two inflatable sub-members each covering a portion of at least one inner wall of an outer casing of the tunable resonator.4. The gas turbine engine according to claim 1 , wherein the tunable resonator is a Helmholtz resonator claim 1 , a fluid passage of the fluid system being substantially perpendicular to a fluid passage of the tunable resonator.5. The gas turbine engine according to claim 1 , wherein the tunable ...

HELMHOLTZ DAMPER FOR GAS TURBINE WITH COOLING AIR FLOW

A Helmholtz damper for a combustor of a gas turbine includes an enclosure defining a damping volume from which a neck portion extends and which has a flow path (F) for cooling and purging air with an inlet opening and an outlet opening to the enclosure. The outlet opening is formed in the neck portion. A seal is arranged at the neck portion adjacent to the outlet opening for cooling and purging air such that a cooling effect of the seal is provided. 1. A Helmholtz damper for a combustor of a gas turbine comprising an enclosure defining a damping volume from which a neck portion extends and which has a flow path (F) for cooling and purging air with an inlet opening and an outlet opening to said enclosure , wherein said outlet opening is formed in said neck portion , and a seal is arranged at said neck portion adjacent to said outlet opening for cooling and purging air such that a cooling effect of said seal is provided.2. The Helmholtz damper according to claim 1 , further comprising a common supply of cooling and purging air for the damper and said seal.3. The Helmholtz damper according to claim 1 , wherein said seal is an integrated part of said neck portion.4. The Helmholtz damper according to claim 1 , wherein said neck portion has an extended length for the accommodation of said seal and/or fastening means.5. The Helmholtz damper according to claim 1 , wherein said outlet opening is provided with flow guiding means directed to said seal.6. The Helmholtz damper according to claim 1 , wherein said neck portion is provided with fastening means to an interface of a combustor chamber.7. The Helmholtz damper according to claim 1 , wherein said seal is arranged on a circumferential outer side with regard to said enclosure of the damper.8. The Helmholtz damper according to claim 1 , wherein said seal is arranged on a circumferential inner side with regard to said enclosure of the damper.9. The Helmholtz damper according to claim 1 , wherein said seal is segmented along ...

Sound Suppressor

A sound suppressor for use in firearms, internal combustion engines, and numerous other sound-generating devices includes a structure having a plurality of ports, openings, or orifices which function as whistles and which suppress sound from a source of the sound using destructive interference. A combination of varying distances between components is configured for delaying the wave from one port or whistle to the next, so that the whistles are partially out of phase with respect to time, and placing the orifices of the whistles a certain distance apart to compensate for the remaining phase difference in order to create the desired destructive interference.

Muffler for an internal combustion engine

A muffler has a housing enclosing a plurality of chambers. A first flow path extends from an inlet to an outlet passing through a bypass chamber. A flow tube has a plurality of perforations being open to a chamber other than the bypass chamber. A second in flow path passes from the inlet to the outlet without passing through the bypass chamber and passing through the perforations. Exhaust gas is introduced into the muffler via the inlet and discharged therefrom via the outlet. A first portion of the exhaust gas flows from the inlet to the outlet along the first flow path. A second portion of the exhaust gas flows from the inlet to the outlet along the second flow path, the first and second portions mixing at least in the outlet chamber. A semi-closed tube has an open end being open to one of the chambers and a closed end.

Acoustically Tuned Muffler

A muffler may include a shell, first and second baffles, an inlet pipe, first and second outlet pipes, and a communication pipe. The first and second baffles cooperate with the shell to define first, second and third chambers. The first inlet pipe may extend through the shell and may provide exhaust gas to at least one of the first and second chambers. Exhaust gas in the first chamber exits the muffler through the first outlet pipe. Exhaust gas in the second chamber exits the muffler through the second outlet pipe. The communication pipe may include first, second and third openings. The first opening is in communication with the first chamber. The second opening is in communication with the second chamber. The third opening is in communication with the third chamber. The first and second chambers may be in communication with the third chamber through the communication pipe.

RESONATOR, METHOD FOR PRODUCING SUCH A RESONATOR, AND COMBUSTOR ARRANGEMENT EQUIPPED WITH SUCH A RESONATOR

An annular resonator with a multiplicity of perforations for installation into a combustor arrangement of a static gas turbine installation, wherein the resonator is produced from refractory ceramic. A combustor arrangement for a gas turbine installation with a combustor unit, has a combustor, with a transfer line, which is arranged downstream of the combustor unit and which is designed to conduct hot gas generated by the combustor to a turbine, and with at least one resonator. 1. An annular resonator comprising:a multiplicity of perforations for installation in a combustor arrangement of a static gas turbine installation,wherein the resonator is produced from refractory ceramic.2. The resonator as claimed in claim 1 ,wherein said resonator has an outer circumferential surface which tapers conically in an axial direction.3. The resonator as claimed in claim 2 , further comprising:a multiplicity of spring elements acting in a radial direction which is arranged on the outer circumferential surface.4. The resonator as claimed in claim 3 ,wherein the spring elements are leaf springs which extend in an axial direction and are bent radially outward.5. The resonator as claimed in claim 3 ,wherein the spring elements have uniform spacings from one another in the circumferential direction.6. The resonator as claimed in claim 1 ,wherein said resonator is composed of a plurality of ring segments.7. A method for producing a resonator as claimed in claim 1 , the method comprising:forming the annular resonator,wherein as part of the primary forming process of the annular resonator, additively produced mold inserts are used to form the perforations.8. A combustor arrangement for a gas turbine installation claim 1 , comprising:a combustor unit having a combustor,a transition line, which is arranged downstream of the combustor unit and is designed to direct hot gas generated by the combustor to a turbine, and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'at least one resonator ...

EXHAUST-GAS MODULE FOR AN INTERNAL COMBUSTION ENGINE

An exhaust-gas module A for an internal combustion engine, which exhaust-gas module has a base housing having a first side wall, at least one second side wall, an inlet for connection to the internal combustion engine and at least one outlet, wherein the inlet is arranged in the first side wall, and having multiple exhaust-gas purification components which are arranged in the base housing, wherein at least one SCR and/or one DOC are/is provided, wherein the at least one outlet is arranged in the second side wall and serves for the connection of an exhaust tailpipe of the internal combustion engine and/or alternatively for the coupling of an attachment housing, wherein the rest of the base housing, with the exception of the second side wall, is formed without outlets, wherein a connection contour with a circumferential contour U which has a basic shape G is provided for the connection of the attachment housing, wherein the connection contour delimits the second side wall at the edge, wherein at least one of the exhaust-gas purification components DPF, NH3, LNT, HOH is present in the base housing, and/or wherein at least one auxiliary component such as a mixer, an injector or a burner is present in the base housing. 1. An exhaust-gas module A for an internal combustion engine , comprising: a base housing having a first side wall , at least one second side wall , an inlet for connection to the internal combustion engine and at least one outlet , wherein the inlet is arranged in the first side wall , and having multiple exhaust-gas purification components which are arranged in the base housing , wherein at least one SCR and/or one DOC are provided ,{'b': 1', '1, 'wherein the at least one outlet is arranged in the second side wall and serves for the connection of an exhaust tailpipe of the internal combustion engine or alternatively for the coupling of an attachment housing, wherein the rest of the base housing, with the exception of the second side wall, is formed ...

Vehicle wheel

A vehicle wheel ( 1 ) allows a communication hole ( 18 a ) for a first Helmholtz resonator (auxiliary air chamber members ( 10 a, 10 d )) having a lower resonance frequency than that of an air column resonance sound of a tire and a communication hole ( 18 a ) for a second Helmholtz resonator (auxiliary air chamber members ( 10 b, 10 c )) having a higher resonance frequency than that of the air column resonance sound of the tire to be disposed at positions facing each other across a wheel rotation center (Ax).

MUFFLER FOR AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE

A muffler for an exhaust system of an internal combustion engine includes a housing with a circumferential wall. At least one resonator chamber () is defined by the circumferential wall and two base walls (), that are provided in the housing. At least one resonator pipe (), with a first pipe end () and with a second pipe end (), is connected to one of the base walls () in the area of a first opening () in the one of the base walls (). In the alternative or in addition the one of the base walls () traverses an interior space such that the first pipe end () lies outside of the resonator chamber (), with the second pipe end () being fixed to the other base wall (). 1. A muffler for an exhaust system of an internal combustion engine , the muffler comprising:a housing comprised of a circumferential wall;two base walls connected to the circumferential wall, wherein at least one resonator chamber is defined by the circumferential wall and the two base walls and is provided in the housing;at least one resonator pipe with a first pipe end and with a second pipe end, wherein:the resonator pipe is connected to one of the base walls in an area of a first opening in the one of the base walls; orthe one of the base walls traverses an interior space of the housing such that the first pipe end lies outside of the resonator chamber and the second pipe end is fixed to another of the base walls; orthe resonator pipe is connected to one of the base walls in an area of a first opening in the one of the base walls and the one of the base walls traverses an interior space of the housing such that the first pipe end lies outside of the resonator chamber and the second pipe end is fixed to another of the base walls.2. A muffler in accordance with claim 1 , wherein:the second pipe end is in flush contact with the other of the base walls; ora bulge formed on the other of the base walls meshes with the resonator pipe at the second pipe end; orthe second pipe end is in flush contact with the ...

SILENCER INSERT, SILENCER COMPRISING THE SAME AND METHOD FOR MANUFACTURING A SILENCER INSERT

A silencer insert () for a silencer of an exhaust system includes a first and a second partition wall () and a connecting wall () arranged therebetween. The first partition wall () defines a first plane (E), the second partition wall () defines a second plane (E), and the connecting wall () defines a third plane (E). At least one of the first partition wall, the second partition wall, and the connecting wall includes at least one perforated area (). The connecting wall () is formed in one piece with the first partition wall () and the second partition wall (). The first plane encloses with the second plane an angle of not more than 60°, the first plane and the second plane being particularly in parallel. A silencer is provided including a housing () receiving the silencer insert (). A method is provided for manufacturing the silencer insert. 1. A silencer insert for a silencer of an exhaust system , the silencer insert comprising:a first partition wall defining a first plane;a second partition wall defining a second plane, the second plane being different from the first plane;a connecting wall defining a third plane, the third plane being different from the first plane, the third plane being different from the second plane, and the connecting wall being arranged between the first partition wall and the second partition wall, wherein:at least one wall of a wall group consisting of the first partition wall, the second partition wall, and the connecting wall comprises at least one perforated area;the connecting wall is formed in one piece with both, the first partition wall and the second partition wall; andthe first plane and the second plane are parallel or the first plane and the second plane are at an angle relative to each other of not more than 60°.2. The silencer insert according to claim 1 , wherein the third plane and at least one of the first plane and the second plane are at an angle between 20° and 90° relative to each other.3. The silencer insert according ...

Modular acoustic blocks and acoustic liners constructed therefrom

An exhaust processing system that includes: an exhaust passageway for directing exhaust gases, the exhaust passageway having passageway walls that define and enclose the exhaust passageway between an upstream position and a downstream position; and an acoustic liner formed against and covering at least one of the passageway walls of the exhaust passageway. The acoustic liner may include uniformly configured modular acoustic blocks fitted against each other. The modular acoustic blocks each may include interior cavities having different lengths configured to dampen targeted sound frequencies.

EXHAUST MUFFLER

An exhaust muffler for an exhaust system of an internal combustion engine includes a muffler housing () with an outer shell () enclosing a muffler interior (), through which exhaust gas can flow. An inner shell () is arranged in the muffler interior () and covers the outer shell () in at least some areas on an inner side () facing the muffler interior (). 1. An exhaust muffler for an exhaust system of an internal combustion engine , the exhaust muffler comprising a muffler housing , the muffler housing comprising:an outer shell enclosing a muffler interior through which exhaust gas can flow; andan inner shell arranged in the muffler interior and covering the outer shell in at least some areas on an inner side facing the muffler interior.2. The exhaust muffler in accordance with claim 1 , wherein:the outer shell comprises an outer circumferential wall, which is elongated in a direction of a muffler longitudinal axis and encloses same and an end wall connected to each of two axial end areas of the outer circumferential wall; andthe inner shell comprises at least one inner shell part covering the outer circumferential wall on the inner side facing the muffler interior in at least some areas at least in association with the outer circumferential wall.3. The exhaust muffler in accordance with claim 1 , wherein:the outer shell comprises two outer shell parts connected to one another in a connection edge area; andthe inner shell comprises an inner shell part covering the outer shell part on the inner side facing the muffler interior in at least some areas in association with at least one of the outer shell parts.4. The exhaust muffler in accordance with claim 1 , wherein:an intermediate space is formed between the outer shell and the inner shell; andthe inner shell is supported directly at the outer shell in at least one support area.5. The exhaust muffler in accordance with claim 4 , wherein a distance between the outer shell and the inner shell is in the range of 3 mm to ...

NOISE ATTENUATION COMPONENTS

A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit. 1. A reduction device , comprising: an input chamber configured to receive exhaust from a power source,', 'an output chamber downstream of the input chamber,', 'an exhaust channel disposed between the input chamber and the output chamber, the exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and', 'a longitudinal axis extending substantially centrally through the housing;, 'a housing defininga treatment unit disposed in the exhaust channel and along the longitudinal axis, the treatment unit being configured to at least partly remove pollutant species from the exhaust as the exhaust passes through the exhaust channel; and the attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source at a rated load, and', 'the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit., 'an attenuation component disposed in the housing and radially outward of the ...

Acoustically Tuned Muffler

A muffler for receiving exhaust gas from a combustion engine comprises a shell, first and second inlet pipes each having outlets providing exhaust gas to a mixing chamber within the shell, a first chamber and a second chamber positioned within the shell and a pair of communication pipes each including an inlet receiving exhaust gas from the mixing chamber. Each communication pipe includes an outlet providing exhaust to the second chamber. Each of the communication pipes further includes a Helmholtz opening positioned downstream of the mixing chamber. The Helmholtz openings are open to the first chamber. 1. A muffler for receiving exhaust gas from a combustion engine , the muffler comprising:a shell;first and second inlet pipes each having outlets providing exhaust gas to a mixing chamber within the shell;a first chamber and a second chamber positioned within the shell; anda pair of communication pipes each including an inlet receiving exhaust gas from the mixing chamber, each communication pipe including an outlet providing exhaust to the second chamber, each of the communication pipes further including a Helmholtz opening positioned downstream of the mixing chamber, the Helmholtz openings being open to the first chamber.2. The muffler according to claim 1 , wherein the mixing chamber is positioned adjacent to the first chamber and separated from the first chamber by a baffle.3. The muffler according to claim 2 , wherein the mixing chamber is positioned between the mixing chamber and the second chamber.4. The muffler according to claim 1 , wherein at least one of the Helmholtz openings is shaped as a separation between first and second portions of one of the communication pipes.5. The muffler according to claim 4 , wherein the first portion of one of the communication pipes overlaps and is spaced apart from the second portion of one of the communication pipes.6. The muffler according to claim 4 , wherein the first portion of one of the communication pipes is ...

DRONE ELIMINATION MUFFLER

An apparatus and method are provided for a drone elimination muffler to attenuate drone exhibited by engine exhaust systems. The drone elimination muffler comprises a hollow canister having a length and a diameter, and a tuned port comprising a first end connected to the canister and a second end connected to the exhaust system. The canister operates in concert with the tuned port as a dampener configured to substantially attenuate exhaust drone, or resonance, at one or more frequencies of engine operation. A valve is configured to switch the drone elimination muffler between a closed state in which the exhaust system operates without acoustic influence due to the drone elimination muffler, and an open state in which the drone elimination muffler directly influences the acoustic properties of the exhaust system. 1. A drone elimination muffler to attenuate drone exhibited by exhaust systems , comprising:a canister comprising a hollow cylindrical body having a length and a diameter; anda tuned port comprising a first end connected to the canister and a second end connected to the exhaust system, such that the canister and the tuned port operate in concert as a dampener configured to substantially attenuate exhaust drone at one or more frequencies of engine operation.2. The drone elimination muffler of claim 1 , wherein the second end is connected to the exhaust system between a catalytic converter and a muffler claim 1 , such that the tuned port and the canister are in fluid communication with the exhaust system.3. The drone elimination muffler of claim 1 , wherein the second end is connected to the exhaust system at an outlet of the muffler.4. The drone elimination muffler of claim 1 , wherein the tuned port comprises a short claim 1 , side mounted tuned port and a damper clamped within a joint between the canister and the exhaust system.5. The drone elimination muffler of claim 4 , wherein the damper comprises a 40% open perforated stainless steel sheet.6. The drone ...

DRONE ELIMINATION MUFFLER

An apparatus and method are provided for a drone elimination muffler to attenuate drone exhibited by engine exhaust systems. The drone elimination muffler comprises a hollow canister having a length and a diameter, and a tuned port comprising a first end connected to the canister and a second end connected to the exhaust system. The canister operates in concert with the tuned port as a dampener configured to substantially attenuate exhaust drone, or resonance, at one or more frequencies of engine operation. A valve is configured to switch the drone elimination muffler between a closed state in which the exhaust system operates without acoustic influence due to the drone elimination muffler, and an open state in which the drone elimination muffler directly influences the acoustic properties of the exhaust system. 1. A drone elimination muffler to attenuate drone exhibited by exhaust systems , comprising:a canister comprising a hollow cylindrical body having a length and a diameter; anda tuned port comprising a first end connected to the canister and a second end connected to the exhaust system, such that the canister and the tuned port operate in concert as a dampener configured to substantially attenuate exhaust drone at one or more frequencies of engine operation.2. The drone elimination muffler of claim 1 , wherein the second end is connected to the exhaust system between a catalytic converter and a muffler claim 1 , such that the tuned port and the canister are in fluid communication with the exhaust system.3. The drone elimination muffler of claim 1 , wherein the second end is connected to the exhaust system at an outlet of the muffler.4. The drone elimination muffler of claim 1 , wherein the tuned port comprises a short claim 1 , side mounted tuned port and a damper clamped within a joint between the canister and the exhaust system.5. The drone elimination muffler of claim 4 , wherein the damper comprises a 40% open perforated stainless steel sheet.6. The drone ...

MUFFLER

A muffler includes a first chamber, a second chamber, an extender tube, a reverse flow tube, and a separation chamber. The first chamber is coupled to an exhaust inlet of the muffler. The extender tube is coupled to the first chamber and the second chamber. The exhaust gas flows from the first chamber to the second chamber through the extender tube in a first direction. The reverse flow tube coupled to the second chamber. The exhaust gas flows through the second chamber from the extender tube to the reverse flow tube in a second direction different than the first direction. The separation chamber that provides spatial separation between the first and second chamber. 1. A combustion noise suppression device comprising:a first chamber coupled to an engine;a second chamber, wherein the first chamber and the second chamber are shaped for an exhaust to flow from the first chamber to the second chamber; anda third chamber between the first chamber and the second chamber and having at least one dimension selected according to a frequency range of the engine, wherein the at least one dimension causes acoustic pressure cancellation through impedance mismatch.2. The combustion noise suppression device of claim 1 , wherein the at least one dimension of the third chamber is a length of the third chamber.3. The combustion noise suppression device of claim 2 , wherein the length of the third chamber is less than a quarter wavelength of sound waves at the frequency range of the engine.4. The combustion noise suppression device of claim 1 , wherein the third chamber creates an impedance mismatch between the first chamber and the second chamber.5. The combustion noise suppression device of claim 1 , wherein the impedance mismatch attenuates sounds from the frequency range less than a predetermined frequency.6. The combustion noise suppression device of claim 1 , wherein the at least on dimension and the frequency range depends on a volume displacement of the engine.7. The combustion ...

AN ACOUSTIC ATTENUATOR FOR DAMPING PRESSURE VIBRATIONS IN AN EXHAUST SYSTEM OF AN ENGINE, AN ACOUSTIC ATTENUATION SYSTEM USING THE ATTENUATORS, AND METHOD OF DAMPING PRESSURE VIBRATIONS IN AN EXHAUST SYSTEM OF AN ENGINE

An acoustic attenuator for damping pressure vibrations in an exhaust system of an engine, the acoustic attenuator having a body which is provided with a gas inlet and a gas outlet at opposite ends thereof, and a gas passage duct arranged between the inlet and the outlet inside the body, where in the body encloses a first resonator chamber and a second resonator chamber. The body is provided with a common inlet communicating with the first and the second resonator chambers, and the resonator chambers are arranged to extend from the common inlet towards the opposite ends of the body. 1. An acoustic attenuator for damping pressure vibrations in an exhaust system of an engine , the acoustic attenuator comprising:a body which is provided with a gas inlet and a gas outlet at opposite ends thereof, and a gas passage duct arranged between the inlet and the outlet inside the body, wherein the body encloses a first resonator chamber and a second resonator chamber, and wherein the body is provided with:a common inlet communicating with the first and the second resonator chambers, and the first and second resonator chambers are arranged to extend from the common inlet towards opposite ends of the body.2. An acoustic attenuator according to claim 1 , wherein the gas passage duct is a straight gas duct and the resonator chambers are arranged annularly around the duct claim 1 , wherein the attenuator comprises:two longitudinally spaced intermediate walls radially extending from the gas passage duct to a sleeve part of the body and wherein the common inlet is arranged longitudinally between the intermediate walls.3. An acoustic attenuator according to claim 1 , wherein the resonator chambers are connected with the common inlet via ports.4. An acoustic attenuator according to claim 3 , wherein the ports are arranged to claim 3 , and supported by the intermediate walls.5. An acoustic attenuator according to claim 3 , wherein the gas passage duct is directed parallel with a ...

Vacuum Cleaner and Electric Motor Module Thereof

A vacuum clear and an electric motor module () therefor are provided. The electric motor module () includes an outer casing () provided with an air inlet () at a front side thereof and an air outlet () at a rear side thereof; an electric motor assembly () arranged in the outer casing (), and cooperating with the outer casing () to define an air passage in communication with the air inlet () and the air outlet (); and a silencer () arranged at the air inlet (), defining at least one resonant cavity therein, and the at least one resonant cavity having a side wall provided with a throat in communication with the resonant cavity. 1. An electric motor module for a vacuum cleaner , comprising:an outer casing provided with an air inlet at a front side of the outer casing and an air outlet at a rear side of the outer casing;an electric motor assembly arranged in the outer casing, and cooperating with the outer casing to define an air passage in communication with the air inlet and the air outlet; anda silencer arranged at the air inlet, defining at least one resonant cavity in the silencer, and the least one resonant cavity having a side wall provided with a throat in communication with the resonant cavity.2. The electric motor module according to claim 1 , wherein the silencer comprises an annular first silencing component claim 1 , the first silencing component cooperates with the outer casing to define a first resonant cavity claim 1 , one of an inner peripheral wall and an outer peripheral wall of the first silencing component is provided with a first throat in communication with the first resonant cavity.3. The electric motor module according to claim 2 , wherein the silencer further comprises a second silencing component claim 2 , the second silencing component is arranged at an inner side of the first silencing component claim 2 , the second silencing component defines a second resonant cavity therein claim 2 , and the second silencing component is provided with a ...

Mixing Apparatus For An Exhaust Gas Aftertreatment System, Exhaust Gas Aftertreatment System And Internal Combustion Engine

A mixing apparatus for mixing a precursor substance of a reducing agent with exhaust gas, having a housing that provides a mixing chamber and a silencer. The housing inlet side has an inlet connection for exhaust gas and an outlet side having an outlet connection for reducing agent intermixed with the exhaust gas to be discharged. Longitudinal axes of the inlet and outlet connections are offset and parallel relative to one another. An introduction device introduces a precursor substance of the reducing agent and is positioned at the inlet side in a region of the outlet connection longitudinal axis. A length of the housing between the inlet and outlet side at least 1.9 to 7 times a diameter of the inlet connection. A width of the housing is maximally 3 times the diameter of the inlet connection. 1. A mixing apparatus of an SCR exhaust gas aftertreatment system configured to mix a precursor substance of a reducing agent with exhaust gas , comprising: an inlet side;', 'an outlet side opposite the inlet side; and', 'side walls that extend between the inlet side and the outlet side;, 'a housing that provides a mixing chamber and a silencer, the housing havingan inlet connection for a feed line arranged at the inlet side and configured to introduce the exhaust gas into the housing;an outlet connection for a discharge line arranged at the outlet side and configured to discharge the exhaust gas and reducing agent intermixed with the exhaust gas from the housing;wherein a longitudinal axis of the inlet connection and a longitudinal axis outlet connection are offset relative to one another and are one of parallel or perpendicular to one another; andan introduction device configured to introduce the precursor substance of the reducing agent into the exhaust gas, arranged at the inlet side in a region of the longitudinal axis of the outlet connection,wherein a length of the housing between the inlet side and the outlet side of the housing is at least 1.9 times and maximally 7 ...

Motorcycle and Motorcycle Rear Wheel Swingarm with Integrated Resonator

A motorcycle has an engine and an exhaust gas pipe which is connected thereto, as well as a motorcycle rear wheel swingarm. The motorcycle rear wheel swingarm has a closed cavity which is in fluid connection with the exhaust gas pipe by way of a connecting element. 1. A motorcycle , comprising:an engine;an exhaust pipe coupled with the engine;a rear wheel swingarm, whereinthe rear wheel swingarm comprises an enclosed cavity in fluid communication with the exhaust pipe via a connecting element.2. The motorcycle according to claim 1 , wherein the cavity is configured as a Helmholtz resonator.3. The motorcycle according to claim 1 , wherein the rear wheel swingarm has a hollow-chamber profile.4. The motorcycle according to claim 1 , wherein the connecting element is a temperature-resistant hose.5. The motorcycle according to claim 1 , wherein the connecting element is fixed to the cavity and the exhaust pipe via respective connection fittings.6. The motorcycle according to claim 1 , wherein the connecting element is connected to the exhaust pipe upstream of a rear muffler and downstream of a catalytic converter when viewed in an exhaust gas flow direction.7. The motorcycle according to claim 1 , wherein the cavity has a volume of 1 claim 1 ,000-3 claim 1 ,000 cm.8. The motorcycle according to claim 7 , wherein the connecting element has a length of 120-250 mm.9. The motorcycle according to claim 1 , wherein the connecting element has a length of 120-250 mm.10. The motorcycle according to claim 8 , wherein the connecting element has a diameter of 30-40 mm.11. The motorcycle according to claim 1 , wherein the connecting element has a diameter of 30-40 mm.12. A motorcycle component claim 1 , comprising:a rear wheel swingarm, wherein the rear wheel swingarm comprises an integrated cavity configured as a Helmholtz resonator, andthe cavity being configured for a fluid communication with an exhaust pipe. This application is a continuation of PCT International Application No. ...

Compact acoustic resonator for enclosed systems

A noise reduction system includes an enclosed system in which undesirable acoustic noise is generated by one or more associated noise-generating subsystems, and an acoustic resonator mounted on an exterior wall of the enclosed system, with an opening being defined through the exterior wall to allow for the passage of sound pressure waves from within the enclosed system to the acoustic resonator. The acoustic resonator includes a neck connected to the exterior wall at the opening and through which sound pressure waves from the enclosed system travel, at least two branches extending off from the neck, and a resonator connected to a distal end of each of the at least two branches.

Muffler With Internally Supported Tuner

A muffler for receiving exhaust gas from a combustion engine is disclosed. The muffler includes a casing and a pipe. The casing includes a shell coupled to first and second end caps that cooperate to define an internal volume. The pipe is disposed within the internal volume and extends substantially a length of the shell. Each of the first and second end caps includes a circumferentially extending flange engaging an outer surface of the pipe to provide support for the pipe. Each circumferentially extending flange extends at an acute angle relative to a shell axis of the shell. Each circumferentially extending flange is coaxial along a pipe axis of the pipe. 1. A muffler for receiving exhaust gas from a combustion engine , the muffler comprising:a casing including a shell coupled to a first end cap and a second end cap that cooperate to define an internal volume; anda pipe disposed within the internal volume and extending substantially a length of the shell,wherein each of the first and second end caps includes a circumferentially extending flange engaging an outer surface of the pipe to provide support for the pipe, each circumferentially extending flange extending at an acute angle relative to a shell axis of the shell,wherein the circumferentially extending flanges are coaxially aligned along a pipe axis of the pipe.2. The muffler of claim 1 , further comprising a baffle disposed within the shell and cooperating with the shell to define a first chamber and a second chamber claim 1 , wherein a first section of the pipe extends through the first chamber and includes apertures formed along an entire length of the first section.3. The muffler of claim 2 , further comprising a tuner pipe extending from a second section of the pipe that extends through the second chamber claim 2 , wherein the tuner pipe is in fluid communication with the second chamber and an interior volume of the pipe.4. The muffler of claim 1 , wherein the pipe has first and second ends claim 1 , the ...

ACOUSTIC VOLUME IN HOT-END OF EXHAUST SYSTEMS

A vehicle exhaust system includes a component housing defining an internal cavity, a first exhaust gas treatment element positioned within the internal cavity, a second exhaust gas treatment element positioned within the internal cavity and axially spaced from the first exhaust gas treatment element by a gap, and a resonator volume in communication with the internal cavity. 1. A vehicle exhaust system comprising:a component housing defining an internal cavity;a first exhaust gas treatment element positioned within the internal cavity;a second exhaust gas treatment element positioned within the internal cavity and axially spaced from the first exhaust gas treatment element by a gap; anda resonator volume in communication with the internal cavity.2. The vehicle exhaust system according to wherein the resonator volume is formed between an outer surface of the component housing and an inner surface of a resonator housing that at least partially surrounds the component housing claim 1 , and including at least one resonator connection in communication with the resonator volume claim 1 , wherein the resonator connection is located at the gap.3. The vehicle exhaust system according to wherein the resonator volume is formed between an outer surface of the component housing and an inner surface of a resonator housing that at least partially surrounds the component housing claim 1 , and including an inlet cone positioned at one end of the component housing and an outlet cone positioned at an opposite end of the component housing claim 1 , and including at least one resonator connection in communication with the resonator volume claim 1 , and wherein the at least one resonator connection is located at one of the inlet and outlet cones.4. The vehicle exhaust system according to wherein the at least one resonator connection comprises at least a first resonator connection located at the gap and a second resonator connection located at one of the inlet and outlet cones.5. The ...

EXHAUST DEVICE

An exhaust device () for a vehicle is provided. The exhaust device () includes an outer shell (), an inlet () to receive exhaust gases, an outlet (), an inner shell () received within the outer shell (), a pair of partition walls () and a Helmholtz neck (). The inner shell () defines an inner volume (). A plurality of first circumferential openings () extending through the inner shell () fluidly communicates the inlet () with the inner volume (). A plurality of second circumferential openings () extending through the inner shell () fluidly communicates the outlet () with the inner volume (). The pair of partition walls () is disposed between the inner shell () and the outer shell (). The pair of partition walls (), the inner shell () and the outer shell () define a Helmholtz chamber () therebetween. The partition walls () seal the Helmholtz chamber () from the inlet () and the outlet (). The Helmholtz neck () is disposed on the inner shell () or one of the pair of partition walls (). 1. An exhaust device comprising:an outer shell;an inlet extending from the outer shell and receiving exhaust gas;an outlet extending from the outer shell;an inner shell received within the outer shell, the inner shell defining an inner volume, a plurality of first circumferential openings therethrough fluidly communicating the inlet with the inner volume, and a plurality of second circumferential openings therethrough fluidly communicating the outlet with the inner volume;a pair of partition walls disposed between the inner shell and the outer shell, wherein the pair of partition walls, the inner shell and the outer shell define a Helmholtz chamber therebetween, wherein the pair of partition walls seal the Helmholtz chamber from the inlet and the outlet; anda Helmholtz neck disposed on the inner shell or one of the pair of partition walls, the Helmholtz neck fluidly communicating the inner volume with the Helmholtz chamber;wherein the inner shell is radially offset from the outer shell ...

Exhaust System for an Internal Combustion Engine and Method for Operating the Exhaust System

An exhaust system is provided for an internal combustion engine having at least a first and a second cylinder, wherein the first cylinder is assigned a first exhaust gas pipe and the second cylinder is assigned a second exhaust gas pipe. The first exhaust gas pipe is assigned a first muffler, and the second exhaust gas pipe is assigned a second muffler. A first damping pipe branches off from the first exhaust gas pipe upstream of a first shut-off element. The damping pipe firstly opens into a first reflection chamber and is subsequently led through the first muffler and opens into the second exhaust gas manifold downstream of a second shut-off element. A second damping pipe branches off from the second exhaust gas pipe upstream of a second shut-off element. The second damping pipe firstly opens into a second reflection chamber and is subsequently led through the second muffler and opens into the first exhaust gas pipe downstream of the first shut-off element.

SOUND ATTENUATING ENGINE EXHAUST SYSTEM

A sound attenuating engine exhaust system and methods are provided for directing exhaust gases away from an internal combustion engine of a vehicle and attenuating undesirable exhaust sounds during engine operation. The sound attenuating engine exhaust system comprises an exhaust inlet configured to receive exhaust gases from the internal combustion engine. A first resonator coupled with the exhaust inlet is configured to dampen at least one frequency of exhaust sound waves by way of destructive wave interference. The first resonator includes an exhaust outlet for directing the exhaust gases out of the first resonator. A second resonator is coupled with the first resonator and configured to dampen one or more frequencies of exhaust sound waves by way of a combination of destructive wave interference and Helmholtz resonance. Hangers facilitate attaching the sound attenuating engine exhaust system to an undercarriage of the vehicle. 1. A sound attenuating engine exhaust system to convey exhaust gases away from an internal combustion engine of a vehicle , exhaust system comprising:an exhaust inlet configured to receive exhaust gases from the internal combustion engine;a first resonator coupled with the exhaust inlet and configured to dampen at least one frequency of exhaust sound waves;an exhaust outlet for directing the exhaust gases out of the first resonator;a second resonator configured to cooperate with the first resonator to dampen one or more frequencies of exhaust sound waves; anda resonant neck connecting the second resonator with the exhaust outlet and configured to cooperate with the second resonator to dampen the one or more frequencies of exhaust sound waves.2. The exhaust system of claim 1 , wherein the resonant neck comprises a tube-shaped member that is connected to the exhaust outlet at a first end and connected to the second resonator at a second end.3. The exhaust system of claim 1 , wherein the resonant neck puts the second resonator into fluid ...

AN EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION AUTOMOTIVE ENGINE

An exhaust system for an internal combustion automotive engine, comprising: a left exhaust tract connected or to be connected to a left group of cylinder of the internal combustion automotive engine and a right exhaust tract connected or to be connected to a right group of cylinder of the internal combustion automotive engine, the left and right exhaust tracts, each comprising a branching structure defining a tract inlet, at least one exhaust outlet directly or indirectly opening into atmosphere, and an interconnecting outlet interconnecting said left and right exhaust tracts, wherein said interconnecting outlets are interconnected with each other by a common exhaust gas cleaning and/or silencing device downstream said interconnecting outlets such that exhaust gas flows coming from said interconnecting outlets are unified within said common exhaust gas cleaning and/or silencing device. 2. An exhaust system according to claim 1 , wherein said common exhaust gas cleaning and/or silencing device comprises a left and a right interconnecting inlet to which a respective interconnecting pipe is connected and/or said common exhaust gas cleaning and/or silencing device comprises a left returning outlet and a right returning outlet reconnecting the common exhaust gas cleaning and/or silencing device to the respective left and right exhaust tract claim 1 , particularly to said branching structure claim 1 , wherein particularly the common exhaust gas cleaning and/or silencing device is fitted with two internal intersecting pipes connecting the respective left and right interconnecting inlets with the right and left returning outlets of the common exhaust gas cleaning and/or silencing device and/or forming an X-formed intersection.3. An exhaust system according to claim 1 , wherein said common exhaust gas cleaning and/or silencing device comprises a closed housing forming the respective at least two interconnecting inlets and at least two returning outlets for interconnecting ...

EXHAUST GAS SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

An exhaust gas system for an internal combustion engine includes a first exhaust gas line leading into a first muffler; a second exhaust gas line arranged fluidly parallel to the first exhaust gas line and leading into a second muffler, wherein the first and second exhaust gas lines are respectively connected upstream of the first and second muffler at a branch to a common exhaust gas feed line; a control valve arranged in the first exhaust gas line upstream of the first muffler; and a damping device fluidly arranged between the branch and the control valve and adapted for damping exhaust gas resonance vibrations. 110-. (canceled)11. An exhaust gas system for an internal combustion engine comprising:a first exhaust gas line leading into a first muffler;a second exhaust gas line arranged fluidly parallel to the first exhaust gas line and leading into a second muffler, said first and second exhaust gas lines respectively being connected upstream of the first and second muffler at a branch to a common exhaust gas feed line;a control valve arranged in the first exhaust gas line upstream of the first muffler;a damping device fluidly arranged between the branch and the control valve and adapted for damping exhaust gas resonance vibrations, said damping device having a flow connection between the first exhaust gas line and the second exhaust gas line; anda throttle or a cross section adjustment element provided in the flow connection.12. The exhaust gas system of claim 11 , wherein the cross section adjustment element is constructed as a spring-loaded check valve.13. The exhaust gas system of claim 11 , wherein the damping device has a sound absorber.14. The exhaust gas system of claim 13 , wherein the sound absorber is constructed as a resonance absorber.15. The exhaust gas system of claim 11 , wherein the damping device has a flow rectifier.16. The exhaust gas system of claim 15 , wherein the flow rectifier has at least one throttle claim 15 , which leads into an open- ...

EXHAUST SYSTEM HAVING TUNABLE EXHAUST SOUND

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. 1. An exhaust system for a vehicle , the system having a tunable exhaust sound , the system comprising:a resonator having at least two expansion chambers and first and second exhaust conduits passing through said chambers, each of said conduits having a long axis, at least one of said conduits having a band of peripheral perforations, said band being at an angle relative to said long axis;first and second pipes for delivering exhaust gases to said first and second exhaust conduits respectively;first and second mufflers, at least one of said mufflers including an infinitely variable exhaust gas assembly; andfirst and second pipes for delivering exhaust gases from said first and second conduits to said first and second mufflers respectively.2. The exhaust system for a vehicle of claim 1 , wherein said at least two expansion chambers includes a first expansion chamber and a second expansion chamber claim 1 , said band of peripheral perforations being formed on one of said conduits is formed on said first conduit in said first expansion chamber claim 1 , and wherein the other ...

Soundproofing device for transmission

A soundproofing device for a transmission according to the present disclosure is provided to transmit the power of one or more prime movers (for example, internal combustion engine and electric motor). The soundproofing device includes a Helmholtz resonator including: a wall that forms a Helmholtz resonance chamber; and an opening formed in the wall so as to cause the Helmholtz resonance chamber to communicate with the outside of the Helmholtz resonance chamber. The wall includes a transmission case that accommodates the transmission and a housing of a component mounted on the transmission (for example, PCU housing). The Helmholtz resonance chamber is formed between the transmission case and the housing.

IC Power Plant and Methof of Operation

An internal combustion (IC) power plant includes an IC engine and an exhaust system carrying exhaust gasses from the IC engine to an outlet communicating to the atmosphere. 1. An internal combustion (IC) power plant , said IC power plant comprising:an IC engine having a variable-volume combustion chamber producing a flow of combustion gas products, an exhaust port flowing said combustion gas products from said IC engine, and an exhaust valve disposed at said exhaust port and when closed defining at said exhaust port a velocity node of zero velocity for said flow of combustion gas products; anda branched exhaust system conveying said combustion gas products from said exhaust port of said IC engine to atmosphere, said branched exhaust system including a first branch having a length of exhaust conduit at a first end receiving combustion gas products from said exhaust port, and said length of exhaust conduit terminating at a second end conveying said combustion gas products to atmosphere;a second branch of said exhaust system having a respective second length of exhaust conduit communicating with said first branch adjacent to said first end thereof, and receiving combustion gas products from said exhaust port, said second branch and said respective second length of exhaust conduit dead-ending in a resonant chamber of selected resonant frequency; andsaid resonant chamber including structure selected from the group consisting of: a Helmholtz resonator chamber, and a ¼wave resonant pipe;whereby said second branch of said exhaust system both receives combustion gas products from said exhaust port via said first branch, and returns combustion gas products to said first branch according to said selected resonant frequency.2. The IC power plant of wherein said first branch further includes a catalytic converter.3. The IC power plant of wherein said catalytic converter is located along said first branch at the location of a second velocity node.4. The IC power plant of wherein ...

ACOUSTIC VOLUME AND INSULATION IN HOT-END OF EXHAUST SYSTEMS

A vehicle exhaust system includes a component housing defining an internal cavity and at least one exhaust gas treatment element positioned within the internal cavity. A resonator volume is connected in parallel with the internal cavity via at least one resonator element and insulating material is located within the resonator volume. 1. A vehicle exhaust system comprising:a component housing defining an internal cavity;at least one exhaust gas treatment element positioned within the internal cavity;a resonator volume connected in parallel with the internal cavity via at least one resonator element; andinsulating material located within the resonator volume.2. The vehicle exhaust system according to claim 1 , wherein the resonator volume is formed between an outer surface of the component housing and an inner surface of a resonator housing that at least partially surrounds the component housing.3. The vehicle exhaust system according to claim 1 , including an inlet cone positioned at one end of the component housing and an outlet cone positioned at an opposite end of the component housing claim 1 , and wherein the at least one resonator element is located at one of the inlet and outlet cones.4. The vehicle exhaust system according to claim 3 , wherein the at least one resonator element comprises a Helmholtz neck or a perforated portion of at least one of the inlet and outlet cones.5. The vehicle exhaust system according to claim 1 , wherein there is no net flow out of the resonator volume.6. The vehicle exhaust system according to claim 1 , including a second exhaust gas treatment element positioned within the internal cavity and axially spaced from the first exhaust gas treatment element by a gap claim 1 , and wherein the component housing is located in a hot end of the vehicle exhaust system and is immediately downstream of an engine or turbocharger.7. The vehicle exhaust system according to claim 1 , wherein the at least one resonator element comprises at least ...

Exhaust Tube and Tuning Tube Assembly with Whistle Reduction Feature

A vehicle exhaust system component includes an exhaust tube defining an exhaust gas flow path, a side branch tuning tube connected to the exhaust tube at an interface, and a porous structure associated with the exhaust tube to reduce noise generated at the interface. In one example, the porous structure comprises a perforated orifice in the exhaust tube. In another example, the porous structure comprises a mesh screen or mesh sleeve.

MUFFLER

A muffler including a double-pipe structure to muffle sounds in two or more frequencies is provided. The muffler includes an inner and outer pipes with a clearance therebetween. The inner pipe includes a first and second outer surfaces, and, at one end, an opening communicating with the outer pipe. The clearance communicates with an exhaust passage via the opening. The second outer surface forms the opening and is situated closer to the center of the inner pipe than the first outer surface is. A space between the inner and outer pipes is closed due to a contact between the first outer surface and an inner-circumferential surface of the outer pipe. A part of the clearance is formed between the first outer surface and the inner-circumferential surface. The outer-circumferential surfaces of the inner pipe include at least one communication hole that communicates the inner pipe with the clearance. 1. A muffler comprising:an inner pipe having a cylindrical shape; andan outer pipe having a cylindrical shape,the inner pipe being situated in an inner side of the outer pipe and the inner pipe and the outer pipe together forming a double pipe,wherein the double pipe comprises a first double-pipe end and a second double-pipe end,wherein the double pipe is configured to form a first exhaust passage coupling a first flow passage to a second flow passage via the inner pipe such that one of the first double-pipe end or the second double-pipe end is coupled to the first flow passage in an upstream of exhaust flow and the other one of the first double-pipe end or the second double-pipe end is coupled to the second flow passage in a downstream of the exhaust flow,wherein a clearance is provided between the inner pipe and the outer pipe,wherein an opening connecting the inner pipe to the outer pipe is provided at the second double-pipe end,wherein the clearance communicates with the first exhaust passage via the opening,wherein the inner pipe comprises an outer-circumferential surface ...

Turbocharger with a wastegate noise reduction device

The present disclosure provides a turbocharger which reduces noise generated from the wastegate. The turbocharger includes a turbocharger housing, a rotary assembly, and a wastegate door. The turbocharger housing defines a wastegate opening, a resonator proximate to the wastegate opening, a compressor inlet, a compressor outlet, a turbine inlet, and a turbine outlet. The rotary assembly includes a turbine and a compressor attached to one another by a shaft wherein the rotary assembly is disposed in the turbocharger housing. The wastegate door may be moveably affixed to the turbocharger housing.

ACOUSTIC DAMPER FOR GAS TURBINE COMBUSTORS WITH ORTHOGONAL SLOTS

An acoustic damper includes a low porosity layer section and a housing. The low porosity layer section is formed in a liner of a gas turbine combustor and has an arrangement of elongated generally S-shaped slots formed therein. The housing has a plurality of feed apertures. The housing is coupled to the low porosity layer section thereby defining a cavity such that air outside the housing is configured to flow through the apertures and through the elongated generally S-shaped slots in the low porosity layer section, thereby transforming acoustic energy into thermal energy and aiding in providing an acoustic dampening effect for the gas turbine combustor during operation thereof. 1. An acoustic damper system for a gas turbine combustor , the system comprising:a first low porosity layer section formed in a liner of the gas turbine combustor, the first low porosity layer section having a first arrangement of elongated generally S-shaped slots formed therein;a first housing having a first plurality of feed apertures, the first housing being coupled to the first low porosity layer section thereby defining a first cavity, air outside the first housing being configured to flow through at least a portion of the first plurality of feed apertures in the first housing and through at least a portion of the first arrangement of elongated generally S-shaped slots in the first low porosity layer, thereby transforming a first range of frequencies of acoustic energy into thermal energy and aiding in providing an acoustic dampening effect on the first range of frequencies of acoustic energy for the gas turbine combustor during operation thereof;a second low porosity layer section formed in the liner of the gas turbine combustor, the second low porosity layer section having a second arrangement of elongated generally S-shaped slots formed therein; anda second housing having a second plurality of feed apertures, the second housing being coupled to the second low porosity layer section ...

Dual resonator chamber with variable volume

The dual resonator chamber with variable volume includes first and second housings. The second housing is slidably mounted within the first housing such that a second inner neck portion of the second housing is slidably mounted about the first inner neck portion of the first housing and forms a fluid-tight seal therewith. A sliding wall is slidably mounted within the second housing, dividing the interior thereof into upper and lower resonator chambers. At least one first actutator selectively adjusts the height of the sliding wall with respect to the second lower end of the second housing to selectively adjust volumes of the upper and lower resonator chambers. At least one second actuator selectively adjusts the height of the second housing with respect to the first housing to selectively adjust the neck length of the lower resonator chamber.

MUFFLING APPARATUS

An object is to provide a muffling apparatus that can sufficiently reduce noise including a plurality of frequencies, can save space, can easily adjust a frequency to be muffled, and can suppress an increase in the air-flow resistance in a suction passage. A muffling apparatus includes a resonator main body having a predetermined volume, and a communication tube that allows the resonator main body to communicate with a suction passage of an internal combustion engine, wherein the resonator main body includes two or more branch resonant chambers that are branched from the communication tube, and the communication tube includes a connection port connected to the suction passage, and a branch pipe branched to each of the two or more branch resonant chambers. 1. A muffling apparatus comprising:a resonator main body having a predetermined volume; anda communication tube that allows the resonator main body to communicate with a suction passage of an internal combustion engine,wherein the resonator main body includes two or more branch resonant chambers that communicate with the communication tube, andthe communication tube includes a connection port connected to the suction passage, and a branch pipe branched to each of the two or more branch resonant chambers.2. The muffling apparatus according to claim 1 ,wherein an inner diameter and a length of at least one of the communication tube and the branch pipe are adjusted according volumes of the branch resonant chambers to be connected.3. The muffling apparatus according to claim 1 ,wherein the branch resonant chambers and the branch pipe comprise:a first divided body including the connection port, and walls that are arranged vertically from a bottom surface and form side walls of the two or more branch resonant chambers and the branch pipe; anda second divided body that closes ends of the walls, and defines the two or more branch resonant chambers and the branch pipe.4. The muffling apparatus according to claim 3 ,wherein ...

AIRFOIL-MOUNTED RESONATOR

Acoustic treatments for components of gas turbine engines are described. The acoustic treatments include an acoustic resonator having a backing chamber defining a respective volume and a neck arranged relative to the backing chamber and defining an opening, wherein the neck has a length and a cross-sectional area. The acoustic resonator cell satisfies the following relationships: (1) l/L=0.2-0.8, where l is a length of the neck and L is a depth of the backing chamber and (2) a/A=0.02-0.20, where a is a cross-sectional area of the neck and A is a cross-sectional area of the backing chamber.

MOUNTING STRUCTURE OF VARIABLE VALVE FOR DUAL EXHAUST SYSTEM

A mounting structure of a variable valve for a dual exhaust system may include a muffler, at a front end of which is connected a first inlet pipe, and at a rear end of which is connected a first outlet pipe, and a Helmholtz Resonator, at the front end of which is connected a second inlet pipe, and at a rear end of which is connected a second outlet pipe, in which a variable valve which is opened and closed by an Electronic Control Unit (ECU) of a car is disposed on the second outlet pipe connected to the Helmholtz Resonator. 1. A mounting structure of a variable valve for a dual exhaust system comprising:a muffler, at a front end of which is connected a first inlet pipe, and at a rear end of which is connected a first outlet pipe; anda Helmholtz Resonator, at the front end of which is connected a second inlet pipe, and at a rear end of which is connected a second outlet pipe;wherein a variable valve which is opened and closed by an Electronic Control Unit (ECU) of a car is disposed on the second outlet pipe connected to the Helmholtz Resonator.2. The mounting structure of the variable valve for the dual exhaust system of claim 1 , wherein the Helmholtz Resonator is constructed to have relatively small size than the muffler so that the muffler and the Helmholtz Resonator are arranged asymmetrically.3. The mounting structure of the variable valve for the dual exhaust system of claim 1 , wherein the Helmholtz Resonator comprises:a housing, into an inside of which exhaust gas flows and a rear end of which is opened;a first baffle arranged transversely in the housing;a second baffle combined transversely to close the rear end of the housing; anda resonant chamber partitioned by the first baffle and the second baffle.4. The mounting structure of the variable valve for the dual exhaust system of claim 1 , wherein claim 1 , at a time of low load travel of the car claim 1 , the second outlet pipe is closed by the variable valve and the exhaust gas flows in the second inlet ...

MUFFLER

A muffler includes an inner pipe and an outer pipe which, along with the inner pipe, forms a double-wall pipe. A cavity is provided between the inner and outer pipes. A first end of the double-wall pipe is closed between the inner and outer pipes, and a second end of the double-wall pipe has an opening between the inner and outer pipes. The cavity communicates with an exhaust channel via the opening. The cavity is formed as a result of the inner pipe being shaped in a manner such that a portion of an outer-circumferential surface of the inner pipe is positioned on an inner-circumferential side relative to a reference, the reference being a position of an outer-circumferential surface of the outer pipe. 1. A muffler comprising:an inner pipe having a tubular shape, andan outer pipe having a tubular shape, the inner pipe being disposed on an inner-circumferential side of the outer pipe, the outer pipe forming a double-wall pipe with the inner pipe,one of a first end of the double-wall pipe and a second end of the double-wall pipe being continuous to a first channel on an upstream side in an exhaust flow direction, and the other being continuous to a second channel on a downstream side in the exhaust flow direction, thereby forming an exhaust channel coupling the first channel and the second channel via the inner pipe,a cavity being provided between the outer pipe and the inner pipe, the second end having an opening between the inner pipe and the outer pipe, the cavity being configured so as to communicate with the exhaust channel via the opening,the inner pipe having a first range and a second range, an outer side surface of the inner pipe is located at the same position as a reference in the first range, and the outer side surface of the inner pipe is disposed on an inner-circumferential side relative to the reference in the second range, the reference being a position of an inner side surface of the outer pipe,the outer side surface of the inner pipe reaching the ...

ACTIVE HELMHOLTZ RESONATOR WITH ACTUATED MEMBRANE

A vehicle exhaust component includes a body with an open inner cavity providing a fixed volume and a neck having one end associated with the fixed volume and an opposite end associated with an exhaust gas flow path. A flexible membrane separates the fixed volume into a first chamber and a second chamber. An actuator is used to vary a tension of the flexible membrane. 1. A vehicle exhaust component comprising:a body with an open inner cavity providing a fixed volume;a neck having one end associated with the fixed volume and an opposite end associated with an exhaust gas flow path;a flexible membrane separating the fixed volume into a first chamber and a second chamber; andan actuator to vary a tension of the flexible membrane.2. The vehicle exhaust component according to claim 1 , wherein the neck has a fixed length and a fixed diameter.3. The vehicle exhaust component according to claim 1 , wherein the body and neck form a Helmholtz resonator.4. The vehicle exhaust component according to claim 1 , wherein the flexible membrane claim 1 , body claim 1 , and neck cooperate to define a first resonant frequency and a second resonant frequency claim 1 , and wherein the actuator adjusts the tension of an active portion of the flexible member to vary the second resonant frequency.5. The vehicle exhaust component according to claim 1 , wherein the tension is adjusted by the actuator as a function of engine speed.6. The vehicle exhaust component according to claim 1 , wherein the actuator includes a controller and microphone claim 1 , and wherein the tension is adjusted in a closed loop based on input from the microphone.7. The vehicle exhaust component according to claim 1 , wherein the fixed volume has a first cross-sectional shape claim 1 , and wherein an active portion of the flexible membrane has a second cross-sectional shape that is the same as the first cross-sectional shape.8. The vehicle exhaust component according to claim 1 , wherein the actuator comprises a ...

PANEL FOR HEAT EXCHANGE AND IMPROVED NOISE REDUCTION FOR A TURBOMACHINE

A heat exchange and noise reduction panel the panel for an aircraft comprising: an external surface intended to be swept by an airflow and from which fins extend along a first and a second main predetermined direction; cavities forming Helmholtz resonators, linked to the first ends of channels for the passage of air, the second ends of which communicate with said airflow, such that said channels form necks, referred to as Helmholtz resonators, extending substantially along the first direction; and at least one oil flow chamber extending between said external surface and said at least one cavity, and intended to discharge the thermal energy carried by the oil, characterized in that wherein said channels are formed, at least in part, inside said fins. 1. A heat exchange and noise reduction panel for an aircraft turbine engine the panel comprising:an outer surface which is intended for being swept over by an air flow and from which fins extend in a first predetermined main direction and a second predetermined main direction, which directions are preferably substantially perpendicular,recesses which form Helmholtz resonators and are connected to first ends of air-passage channels, second ends of which communicate with said air flow, such that said channels form necks of said Helmholtz resonators that extend substantially in the first direction of the fins,at least one oil circulation chamber which extends between said outer surface and said recesses and is intended for discharging thermal energy from the oil,a stack consisting of said outer surface, said recesses and said at least one chamber extending substantially in the first direction,wherein said channels are formed at least in part inside said fins.2. The heat exchange and noise reduction panel according to claim 1 , wherein the fins are substantially normal or inclined with respect to the outer surface.3. The heat exchange and noise reduction panel according to claim 1 , wherein said channels open onto walls of ...

ACOUSTIC ABSORBER FOR FAN NOISE REDUCTION

A sound suppression assembly is provided for absorbing acoustic energy from an air circulation device. The assembly includes an air circulation device, such as an axial fan, and a plurality of sparsely-arranged two-sided Helmholtz unit cells disposed in a periodic array. Each unit cell includes a lossy resonator and a lossless resonator. The lossy resonator includes a first chamber portion bounded by at least one first boundary wall defining a first chamber volume, and a first neck forming an opening in the first chamber portion. The lossless resonator includes a second chamber portion bounded by at least one second boundary wall defining a second chamber volume, and a second neck forming an opening in the second chamber portion. The unit cells can be positioned in a circular pattern with the first neck of the lossy resonators directed to a source of acoustic energy from the air circulation device. 1. A sound suppression assembly for absorbing acoustic energy from an air circulation device , the sound suppression assembly comprising:an air circulation device;a plurality of sparsely-arranged two-sided Helmholtz unit cells disposed in a periodic array adjacent the air circulation device, [ a first chamber portion bounded by at least one first boundary wall defining a first chamber volume; and', 'a first neck forming an opening in the first chamber portion providing fluid communication between the first chamber portion and an ambient environment; and, 'a lossy resonator having, a second chamber portion bounded by at least one second boundary wall defining a second chamber volume; and', 'a second neck forming an opening in the second chamber portion and providing fluid communication between the second chamber portion and the ambient environment., 'a lossless resonator having], 'wherein each sparsely-arranged two-sided Helmholtz unit cell comprises2. The sound suppression assembly according to claim 1 , wherein the plurality of sparsely-arranged two-sided Helmholtz unit ...

ACOUSTIC ABSORBER WITH INTEGRATED HEAT SINK

A thermal management assembly is provided for both removing heat and absorbing acoustic energy. The thermal management assembly includes a heat sink base component and a plurality of thermally conductive fins disposed in a sparsely-arranged array in thermal communication with the heat sink base component. Each fin defines a two-sided Helmholtz unit cell disposed in a periodic array extending from the heat sink base component. Each unit cell includes a lossy resonator and a lossless resonator. The lossy resonator includes a first chamber portion bounded by at least one first boundary wall defining a first chamber volume, and a first neck forming an opening in the first chamber portion. The lossless resonator includes a second chamber portion bounded by at least one second boundary wall defining a second chamber volume, and a second neck forming an opening in the second chamber portion. 1. A thermal management assembly for removing heat and absorbing acoustic energy , the thermal management assembly comprising:a heat sink base component;a plurality of thermally conductive fins disposed in a sparsely-arranged periodic array in thermal communication with, and extending from, the heat sink base component, each fin defining a two-sided Helmholtz unit cell that comprises: a first chamber portion bounded by at least one first boundary wall defining a first chamber volume; and', 'a first neck forming an opening in the first chamber portion providing fluid communication between the first chamber portion and an ambient environment; and, 'a lossy resonator having a second chamber portion bounded by at least one second boundary wall defining a second chamber volume; and', 'a second neck forming an opening in the second chamber portion and providing fluid communication between the second chamber portion and the ambient environment., 'a lossless resonator having2. The thermal management assembly according to claim 1 , wherein the heat sink base component defines first and second ...

METHOD OF PROVIDING A LEAK FREE ACOUSTIC VOLUME FOR A VEHICLE FRAME MEMBER

A method of forming an acoustic volume in a vehicle component includes providing a vehicle frame member that includes a hollow cavity, forming an internal shell that is completely sealed and which includes at least one connection point, and locating the internal shell within the hollow cavity. At least one exhaust system component is connected to the internal shell at the connection point to provide at least one acoustic volume. 1. A method of forming an acoustic volume in a vehicle component comprising:providing a vehicle frame member that includes a hollow cavity;forming an internal shell that is completely sealed and which includes at least one connection point;locating the internal shell within the hollow cavity; andconnecting at least one exhaust system component to the internal shell at the connection point to provide at least one acoustic volume.2. The method according to including forming the internal shell by blow molding.3. The method according to wherein the internal shell is formed from a plastic or composite material.4. The method according to wherein the connection point comprises at least one opening resulting from a blow molding process.5. The method according to including providing the vehicle frame member as at least first and second outer shells that enclose the hollow cavity claim 2 , attaching the first and second outer shells to each other claim 2 , and blowing molding material into the hollow cavity to form the internal shell.6. The method according to including providing the vehicle frame member as at least first and second outer shells that enclose the hollow cavity and forming the internal shell prior to attaching the first and second outer shells to each other.7. The method according to including forming a plurality of acoustic volumes in the vehicle frame member claim 1 , wherein each acoustic volume has a corresponding internal shell.8. The method according to wherein the vehicle frame member comprises an engine sub-frame that is ...

Muffler

A muffler ( 1 ) for an exhaust system of a vehicle driven by an internal combustion engine, includes a gas-tight housing ( 2 ), a partition wall ( 31 ) inside the housing, an inlet pipe ( 51 ), a first outlet pipe ( 61 ), a switchable second outlet pipe ( 7 ) and a resonator pipe ( 8 ). The a partition wall ( 31 ) divides the housing's interior into a first volume ( 41 ) and a second separate volume ( 42 ). The inlet pipe and the first outlet pipe ( 61 ) and the second outlet pipe and the resonator pipe are in fluid communication with the first volume. The resonator pipe provides fluid communication between the first volume and the second volume. The second outlet pipe passes through the second volume. The second outlet pipe is surrounded, in a circumferential direction, by the resonator pipe in a section in which the second outlet pipe penetrates the partition wall.

MUFFLER

Provided is a muffler having a double pipe portion formed therein in which an end portion of a first tubular member is inserted into a second tubular member from an end portion thereof. A leading end portion of the second tubular member is joined to an outer periphery of the first tubular member. A portion that forms the double pipe portion of the second tubular member comprises a first portion located closer to an end of the first tubular member, and a second portion that is located closer to an end of the second tubular member and that has an enlarged diameter compared with the first portion. A resonance chamber is formed between the first tubular member and the second portion. A communication path that allows communication between an exhaust flow path and the resonance chamber is formed between the first tubular member and the first portion. 1. A muffler comprising:a first tubular member that forms an exhaust flow path of an internal combustion engine; anda second tubular member that is connected to the first tubular member and forms the exhaust flow path together with the first tubular member,wherein a double pipe portion is formed in which an end portion of the first tubular member is inserted into the second tubular member from an end portion thereof,wherein a leading end portion of the second tubular member is joined to an outer periphery of the first tubular member,wherein a portion that forms the double pipe portion of the second tubular member comprises a first portion located closer to an end of the first tubular member, and a second portion that is located closer to an end of the second tubular member and that has an enlarged diameter compared with the first portion,wherein a resonance chamber is formed between the first tubular member and the second portion,wherein a communication path that allows communication between the exhaust flow path and the resonance chamber is formed between the first tubular member and the first portion, andwherein a Helmholtz ...

Road vehicle with an internal combustion engine and provided with an exhaust noise transmission device

Road vehicle having: a passenger compartment; an internal combustion engine provided with at least one exhaust duct, which originates from an exhaust manifold and has at least one exhaust gas treatment device; and an exhaust noise transmission device provided with a transmission duct, which originates from the exhaust duct, and with a symposer device, which is arranged inside the transmission duct, is pneumatically insulating and is acoustically permeable; an inlet of the transmission duct being arranged between the exhaust manifold and the exhaust gas treatment device, hence upstream of the exhaust gas treatment device.

Pump

The pump has a casing accommodating a piston and a driving part. The casing has a first casing member having a driving part retaining portion retaining the driving part, a second casing member fixedly stacked on the first casing member in the reciprocating direction of the piston, and a cylindrical pump chamber peripheral wall member disposed around a head of the piston. The second casing member has an end wall portion extending in a transverse direction substantially perpendicular to the reciprocating direction. A pump chamber, a delivery chamber, and a buffer chamber are defined between the first casing member and the end wall portion of the second casing member. The pump chamber, the delivery chamber, and the buffer chamber are disposed side-by-side in the transverse direction.

Fluid apparatus and buffer tank for use therein

A fluid apparatus includes an air pump and a buffer tank. The buffer tank has an inlet receiving air delivered from the air pump into a storage space, and an outlet discharging the air from the storage space. The storage space contains a discharge flow passage extending from the outlet toward the inlet in the storage space. The discharge flow passage opens toward the inlet. The discharge flow passage has a tapering flow passage portion with a cross-sectional area gradually decreasing toward the outlet. Compressed air delivered from the inlet into the storage space diffuses in the storage space and is introduced into the discharge flow passage from an introduction opening and delivered from the outlet.

MUFFLER COMPRISING A HELMHOLTZ RESONATOR AND A VEHICLE COMPRISING SUCH A MUFFLER

A muffler for a vehicle, where the muffler comprises a partition wall that divides the interior in a first chamber and a second chamber, where an inlet pipe comprising a perforated section arranged in the first chamber and a closed section arranged in the first chamber, where the outlet opening of the inlet pipe is arranged in the second chamber, a first outlet pipe comprising an inlet opening arranged in the first chamber and an outlet opening arranged outside of the muffler, where the muffler comprises a second outlet pipe having an inlet opening arranged in the second chamber, and where the second outlet pipe is provided with an exhaust valve adapted to open or close the exhaust gas flow through the second outlet pipe. The advantage of the invention is that a muffler with an improved low frequency noise attenuation and low backpressure is provided. 1. A muffler for an exhaust gas system of a vehicle comprising an internal combustion engine , the muffler comprising: a gas-tight housing , a partition wall dividing the interior of the housing in a first chamber and a second chamber , an inlet pipe extending through the first chamber and comprising a perforated section arranged in the first chamber and a closed section arranged in the first chamber , where the inlet opening of the inlet pipe is arranged outside of the housing and where the outlet opening of the inlet pipe is arranged in the second chamber , a first outlet pipe comprising an inlet opening arranged in the first chamber and an outlet opening arranged outside of the housing , wherein the muffler comprises a second outlet pipe having an inlet opening arranged in the second chamber and an outlet opening arranged outside of the housing , and wherein the second outlet pipe is provided with a first exhaust valve adapted to open or close the exhaust gas flow through the second outlet pipe.2. The muffler according to claim 1 , wherein the first outlet pipe extends through the second chamber.3. The muffler ...

VEHICLE EXHAUST SYSTEM WITH RESONANCE DAMPING

A vehicle exhaust system includes an exhaust component having an outer surface and an inner surface that defines an internal exhaust component cavity. At least one bleed hole is formed in the exhaust component to reduce a resonance frequency. The bleed hole comprises a discontinuous opening into the exhaust component cavity. 1. A vehicle exhaust system comprising:an exhaust component having an outer surface and an inner surface that defines an internal exhaust component cavity; andat least one bleed hole formed in the exhaust component to reduce a resonance frequency, the at least one bleed hole comprising a discontinuous opening into the internal exhaust component cavity.2. The vehicle exhaust system according to wherein the exhaust component comprises a pipe extending from a first pipe end to a second pipe end.3. The vehicle exhaust system according to wherein the pipe is defined by an overall length claim 2 , and wherein the at least one bleed hole is located at an anti-node position that is approximately 25% of the overall length from either the first or second pipe end.4. The vehicle exhaust system according to wherein the pipe is defined by an overall length claim 2 , and wherein the at least one bleed hole is located at an anti-node position that is approximately 50% of the overall length from either the first or second pipe end.5. The vehicle exhaust system according to wherein the pipe is defined by an overall length claim 2 , and wherein the at least one bleed hole comprises at least two bleed holes including a first bleed hole located at a first anti-node position that is approximately 25% of the overall length from the first pipe end and a second bleed hole located at a second anti-node position that is approximately 25% of the overall length from the second pipe end.6. The vehicle exhaust system according to wherein the discontinuous opening into the exhaust path is provided by a porous member that is associated with the at least one bleed hole.7. The ...

ROAD VEHICLE WITH AN INTERNAL COMBUSTION ENGINE AND PROVIDED WITH A DEVICE FOR THE TRANSMISSION OF THE EXHAUST NOISE

A road vehicle comprising: a passenger compartment; an internal combustion engine; an exhaust system, which releases into the atmosphere the gases generated by the combustion, is connected to the internal combustion engine, and ends with at least one silencer having at least one outlet pipe; and an exhaust noise transmission device, which is provided with a transmission conduit, which originates close to the outlet pipe of the silencer, ends in the area of a wall of the passenger compartment, and is provided, on the inside, with at least one insulating element, which is arranged inside the transmission conduit so as to tightly seal the transmission conduit. 1. A road vehicle comprising:a passenger compartment;an internal combustion engine;an exhaust system, which releases into the atmosphere the gases generated by the combustion, is connected to the internal combustion engine, and ends with at least one silencer provided with at least one outlet pipe, through which the gases generated by the combustion flow out of the exhaust system; andan exhaust noise transmission device, which is provided with a transmission conduit, which originates close to the outlet pipe of the silencer, ends in the area of a wall of the passenger compartment, and is provided, on the inside, with at least one insulating element, which is pneumatically insulating, acoustically permeable, and arranged inside the transmission conduit so as to pneumatically seal the transmission conduit;wherein:a decorative tubular tail pipe coupled to the outlet pipe of the silencer is provided, so that the outlet pipe of the silencer is partially inserted inside the decorative tail pipe and does not touch said decorative tail pipe, i.e. the decorative tail pipe is wider than the outlet pipe and houses, on the inside without mutual contact, one terminal end of said outlet pipe;the decorative tail pipe has, on the side, a “c” from which the transmission conduit originates; andthe opening passing through the side ...

Muffler Assembly Including A Center Muffler And Two Satellite Mufflers

An exhaust assembly includes first and second exhaust devices, and first, second, and third mufflers that are disposed at first, second, third, fourth, and fifth heights, respectively. The first and second heights are greater than the third, fourth, and fifth heights. The first muffler includes a first housing, first and second inlets, and first and second outlets. The first inlet receives exhaust gas from at least one of the first and second exhaust devices. The second inlet receives exhaust gas from at least one of the first and second exhaust devices. The first and second inlets and first and second outlets all fluidly connected. The second muffler includes a second housing, a third inlet that receives exhaust gas from the first outlet, and a third outlet. The third muffler includes a third housing, a fourth inlet that receives exhaust gas from the second outlet, and a fourth outlet.

Muffler Assembly Including A Center Muffler And Two Satellite Mufflers

A muffler assembly includes first, second, and third mufflers. The first muffler includes a first housing and an X-pipe that is at least partially disposed within the first housing. The X-pipe has first and second inlets and first and second outlets that are all fluidly connected to one another. The first and second inlets receive exhaust gas from the engine. The second muffler includes a second housing and a first Y-pipe that is at least partially disposed therein. The first Y-pipe has a third inlet that receives exhaust gas from the first outlet, and third and fourth outlets. The third muffler includes a third housing and a second Y-pipe that is at least partially disposed therein. The second Y-pipe has a fourth inlet that receives exhaust gas from the second outlet, and fifth and sixth outlets. The first, second, and third housings are spaced apart from one another. 1. A muffler assembly for receiving exhaust gas from an engine of a vehicle adapted to travel along a surface , the muffler assembly comprising:a first muffler including a first housing and an X-pipe that is at least partially disposed within the first housing, the X-pipe having a first inlet, a first outlet, a second inlet, and a second outlet, the first and second inlets each being adapted to receive exhaust gas from the engine, each of the first and second inlets and first and second outlets being fluidly connected to one another;a second muffler including a second housing and a first Y-pipe that is at least partially disposed within the second housing, the first Y-pipe having a third inlet that is adapted to receive exhaust gas from the first outlet, a third outlet, and a fourth outlet; anda third muffler including a third housing and a second Y-pipe that is at least partially disposed within the third housing, the second Y-pipe having a fourth inlet that is adapted to receive exhaust gas from the second outlet, a fifth outlet, and a sixth outlet, wherein each of the first housing, the second ...

EXHAUST SYSTEM SUPPORT STRUCTURE

A support member is fixed to an outer circumferential surface of an exhaust pipe with a bracket. The bracket comprises a main body and a flange portion. The main body has a cylindrical shape, whose diameter increases gradually. The flange portion is arranged so as to extend outward from a large-diameter end, which is an end having a larger diameter in the main body. The flange portion is joined to the outer circumferential surface of the exhaust pipe. The support member comprises a rod-like end, which is an end in a rod-like shape. The support member is joined to a rim portion of an opening of a small-diameter end, which is one end having a smaller diameter in the main body, such that the rod-like end is inserted into the opening. 1. An exhaust system support structure comprising:an exhaust pipe forming an exhaust flow passage;a bracket; anda support member fixed to an outer circumferential surface of the exhaust pipe with the bracket,wherein the bracket comprises: a main body having a cylindrical shape, whose diameter increases gradually; and a flange portion arranged so as to extend outwards from a large-diameter end, which is an end having a larger diameter in the main body,wherein the flange portion is joined to the outer circumferential surface of the exhaust pipe,wherein the support member comprises a rod-like end, which is an end in a rod-like shape, the support member being joined to a rim portion of an opening of a small-diameter end, which is one end having a smaller diameter in the main body, such that the rod-like end is inserted into the opening.2. The exhaust system support structure according to claim 1 ,wherein in the support member, an axial circumference of the rod-like end is entirely joined to the main body.3. The exhaust system support structure according to claim 1 ,wherein the flange portion is arranged circularly around a rim portion of the large-diameter end and in the flange portion, a circular circumference is entirely joined to the outer ...

EXHAUST SYSTEM AND MUFFLER

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. 1. A muffler for use with an engine , the muffler comprising:a first tube defining a first inlet and a first outlet spaced apart from the first inlet, wherein the first tube is configured to receive exhaust from the engine at the first inlet;a second tube spaced apart from the first tube, the second tube defining a second inlet and a second outlet spaced apart from the second inlet, wherein the second tube is configured to receive exhaust from the engine at the second inlet;a third tube disposed at least partly around the second tube, the third tube defining a third outlet spaced apart from each of the second inlet and the second outlet, wherein the third outlet is in fluid communication with the second outlet of the second tube; andat least one outlet tube in fluid communication with the first outlet and the third outlet.2. The muffler of claim 1 , further comprising a connecting member configured to connect the second tube to the third tube.3. The muffler of claim 1 , further comprising a housing at least partly enclosing the first tube claim 1 , the second tube and the third tube claim 1 , the housing defining a common chamber in ...

自動車用エンジンのマフラ−

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Muffler for Automobile

본 고안은 자동차용 소음기에 관한 것으로, 좀더 상세히, 자동차용 소음기에 있어서, 흡배출관(102)으로 유입된 배기가스가 흡배출관 출구(102b)로 빠지기 전에 흡배출관구멍(102c)들과 흡음재(105)로 채워진 레조네이터공간(104)의 작용에 의해서 중고주파수의 소음과 유동소음이 감쇠가 이루어지는 것을 특징으로 하는 전부머플러(100)와; 양측에 엔드플레이트(221, 222)가 구비된 후부 머플러본체(201)의 내부에 제1, 제2 격벽(205, 206)이 순차적으로 형성되고, 제1, 제2 격벽(205, 206)에 의해 제1, 제2, 제3 공간(209, 208, 207)이 순차적으로 형성되고, 흡입관(202)은 상기 제1 공간(209)과 제2 공간(208)을 거쳐 구성되고, 제2 공간(208)을 거쳐 구성되는 바이패스튜브(203)는 제1, 제2 격벽(205, 206)에 의해 지지되면서 개방된 바이패스튜브출구(203c)가 상기 제1 공간(209)과 연통되고, 바이패스튜브의 타단(203b)은 막혀있으며, 배출관(204)은 제1, 제2 격벽(205, 206)과 타측 엔드플레이트(222)에 의해 지지되면서 제2 공간(208)과 제3 공간(207)을 거쳐 구성되는 것을 특징으로 하는 후부머플러(200);로 구성되는 자동차용 소음기에 관한 것이다. The present invention relates to an automobile silencer, and more particularly, in an automobile silencer, before the exhaust gas flowing into the suction discharge pipe 102 is discharged to the suction discharge pipe outlet 102b, the suction discharge pipe holes 102c and the sound absorbing material 105 All muffler 100, characterized in that the noise of the high frequency and the flow noise is attenuated by the action of the resonator space 104 filled with; First and second partitions 205 and 206 are sequentially formed in the rear muffler body 201 having end plates 221 and 222 on both sides thereof, and the first and second partitions 205 and 206. The first, second, and third spaces 209, 208, and 207 are sequentially formed, and the suction pipe 202 is configured through the first space 209 and the second space 208, and the second space. The bypass tube 203 formed through the 208 is supported by the first and second partition walls 205 and 206 so that the bypass tube outlet 203c opened in communication with the first space 209, The other end 203b of the bypass tube is blocked, and the discharge pipe 204 is supported by the first and second partitions 205 and 206 and the other end plate 222, and the second space 208 and the third space ( It relates to a vehicle muffler consisting of; rear muffler 200, characterized in that ...

Silencer insertion piece, the silencer including it and method for manufacturing silencer insertion piece

本发明涉及消声器插入件(10)，包括第一和第二分隔壁(11，12)以及布置在其间的连接壁(13)。第一分隔壁(11)限定第一平面(E1)，第二分隔壁(12)限定不同于第一平面(E1)的第二平面(E2)，连接壁(13)限定不同于第一(E1)和第二(E2)平面的第三平面(E3)。由第一分隔壁(11)、第二分隔壁(12)和连接壁(13)组成的组中的至少一个壁包括至少一个穿孔区域(15)。连接壁(13)与第一分隔壁(11)和第二分隔壁(12)两者一体形成。第一平面(E1)与第二平面(E2)成不大于60°的角度，第一平面(E1)与第二平面(E2)尤其是平行的。还涉及包括接纳消声器插入件(10)的壳体(1)的消声器。此外描述了用于制造消声器插入件的方法。

Muffler for Vehicle

본 고안은 자동차용 소음기에 관한 것으로, 좀더 구체적으로, 본 고안은 전부머플러와 후부머플러로 구성된 자동차용 소음기에 있어서, 양단에 엔드플레이트(108, 109)가 구비된 전부머플러 본체(101)의 내부 공간에 격벽1(104)이 구비되고, 일측 엔드플레이트(108)와 격벽1(104)에 의해 공간1(106)이 구비되고, 상기 격벽1(104)과 타측 엔드플레이트(109)에 의해 공간2(106)가 구비되고, 상기 공간2(106)에 흡음재(107)가 구비되는 전부머플러(100)와; 엔드플레이트(208, 209)가 구비된 후부머플러본체(201) 내부에 격벽구멍(205a)이 형성된 제1 격벽(205)이 구비되고, 흡입관 입구(202-In)가 관통되는 일측 엔드플레이트(208)와 제1 격벽(205) 사이에 제1 공간(206)이 구비되고, 상기 제1 격벽(205)과 타측 엔드플레이트(209) 간에 제2 공간(207)이 구비되는 후부머플러(200);를 포함하여 구성되는 것을 특징으로 하는 자동차용 소음기에 관한 것이다.

Muffler

Deafener

一种消音器，其具备壳体、将排气导入壳体内的入口管、以及将排气从壳体内排出的出口管。在出口管的排气流入侧开口部设置有盖部，该盖部配置为对排气流入侧开口部进行封闭。在盖部设置有使排气流入出口管内的排气流入口、对排气流入口进行开闭的阀芯、以及与排气流入口分开形成的至少一个连通孔。阀芯构成为在出口管内能够以阀芯的旋转轴为中心旋转移动。至少一个连通孔相对于排气流入口设置在阀芯的旋转轴侧。

Exhaust device for internal combustion engine

【課題】従来用いられていたサブマフラを廃止して排気騒音を低減することができ、排気装置の重量を低減することができるとともに、排気装置の製造コストを低減することができる内燃機関の排気装置を提供すること。【解決手段】テールパイプ４０の内部に上流開口端４１ａおよび下流開口端４１ｂを有するインナーパイプ４１を設け、インナーパイプ４１の上流開口端４１ａをテールパイプ４０の内部から外方に突出させて共鳴室３８に連通させることにより、この上流開口端４１ａが共鳴室３８を画成するマフラ２７のアウタシェル３１、エンドプレート３２および仕切板３４によって閉塞される。【選択図】図３ An exhaust device for an internal combustion engine that can reduce the exhaust noise by eliminating a conventionally used sub-muffler, can reduce the weight of the exhaust device, and can reduce the manufacturing cost of the exhaust device. To provide. An inner pipe (41) having an upstream opening end (41a) and a downstream opening end (41b) is provided inside the tail pipe (40), and the upstream opening end (41a) of the inner pipe (41) is protruded outward from the inside of the tail pipe (40). The upstream open end 41 a is closed by the outer shell 31, the end plate 32, and the partition plate 34 of the muffler 27 that defines the resonance chamber 38. [Selection] Figure 3

Exhaust system for personal watercraft

Muffler insert, muffler including the same, and method for manufacturing the muffler insert

本发明涉及消声器插入件(10)，包括第一和第二分隔壁(11，12)以及布置在其间的连接壁(13)。第一分隔壁(11)限定第一平面(E1)，第二分隔壁(12)限定不同于第一平面(E1)的第二平面(E2)，连接壁(13)限定不同于第一(E1)和第二(E2)平面的第三平面(E3)。由第一分隔壁(11)、第二分隔壁(12)和连接壁(13)组成的组中的至少一个壁包括至少一个穿孔区域(15)。连接壁(13)与第一分隔壁(11)和第二分隔壁(12)两者一体形成。第一平面(E1)与第二平面(E2)成不大于60°的角度，第一平面(E1)与第二平面(E2)尤其是平行的。还涉及包括接纳消声器插入件(10)的壳体(1)的消声器。此外描述了用于制造消声器插入件的方法。

Silencer

본 발명은 소음기에 관한 것으로, 내부면에 흡음재가 구비된 자켓과 내부관을 갖는 소음기에 있어서, 내부관의 표면에 형성된 천공으로 인한 단면 변화를 통해 중고주파수 소음을 저감시키는 천공관부와, 천공관부의 일단에 연장되어 음파의 위상차의 상쇄를 통해 저주파수 소음을 저감시키는 연장관부와, 천공관부의 타단에 연결되어 헬름홀츠 공명을 통해 저주파수 소음을 저감시키는 공명관부를 포함할 수 있다. The present invention relates to a silencer, in the silencer having a jacket and an inner tube provided with a sound absorbing material on the inner surface, the perforated pipe portion for reducing the high-frequency noise through the cross-sectional change due to the perforations formed on the surface of the inner pipe, the perforated pipe portion It may include an extension tube portion extending to one end of the low-frequency noise through the offset of the phase difference of the sound wave, and a resonance tube portion connected to the other end of the perforated tube portion to reduce the low frequency noise through the Helmholtz resonance.

IMPROVED HEAT EXCHANGE AND NOISE REDUCTION PANEL FOR GAS-TURBINE ENGINE

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2017 111 373 A (51) МПК F28F 3/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2017111373, 23.10.2015 (71) Заявитель(и): САФРАН ЭРКРАФТ ЭНДЖИНЗ (FR) Приоритет(ы): (30) Конвенционный приоритет: 29.10.2014 FR 1460375 34 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.05.2017 FR 2015/052856 (23.10.2015) (87) Публикация заявки PCT: R U Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) УСОВЕРШЕНСТВОВАННАЯ ПАНЕЛЬ ТЕПЛООБМЕНА И УМЕНЬШЕНИЯ ШУМА ДЛЯ ГАЗОТУРБИННОГО ДВИГАТЕЛЯ (57) Формула изобретения 1. Панель (10) теплообмена и уменьшения шума для газотурбинного двигателя, в частности, авиационного газотурбинного двигателя, при этом панель содержит: - наружную поверхность (22), которая предназначена для обдувания воздушным потоком и начиная от которой проходят пластинки (26) в заданных первом и втором главных, предпочтительно по существу перпендикулярных направлениях, - полости (20), образующие резонаторы Гельмгольца, соединенные с первыми концами (30) каналов для прохождения воздуха, вторые концы которых сообщаются с воздушным потоком таким образом, что упомянутые каналы образуют сужения резонаторов Гельмгольца, проходящих по существу в первом направлении пластинок, - по меньшей мере одну масляную камеру (16), расположенную между наружной поверхностью и по меньшей мере одной полостью и предназначенную для удаления тепловой энергии, сообщаемой маслом, при этом набор из наружной поверхности, по меньшей мере одной полости и по меньшей мере одной масляной камеры расположен по существу в первом направлении, отличающаяся тем, что упомянутые каналы по меньшей мере частично выполнены в пластинках. 2. Панель (10) по п. 1, в которой пластинки (26) проходят по существу по нормали Стр.: 1 A 2 0 1 7 1 1 1 3 7 3 A WO 2016/066936 (06.05.2016) 2 0 1 7 1 1 1 3 7 3 (86) Заявка PCT: R U (43) Дата ...

Structure of muffler for automobile

PURPOSE: A structure of a muffler for an automobile is provided to increase maximally an attenuation effect of a noise by mounting a pipe having a longer length than a length of the muffler at an inner of the muffler to introduce a frequency band of the noise into a low frequency region. CONSTITUTION: A first chamber(1), a second chamber(2) and a third chamber(3) are provided into a housing(10) divided by a partition(4). A first pipe(5) is inserted to the first chamber(1). The first pipe(5) is provided with a rapidly conversed pipe(5a) mounting to the first chamber(1) and is installed to extend to the third chamber(3) through the second chamber(2). A second pipe(6) is mounted between the second chamber(2) and the third chamber(3) to communicate each other. A third pipe(7) is mounted to the outside of the housing(10) passing through the second chamber and the third chamber.

Silencer of Absorption-Resonance type

본 발명은 고성능 흡음공명형 소음기에 관한 것으로, 내연기관(발전 기류), 배기가스, 감압변후단. 증기안전밸브 등에 사용되는 소음기로서 간단한 구조로 저중음역의 주파수 성분의 저감에 효과적인 감음성능을 가지도록 하는 데 목적이 있다. The present invention relates to a high performance sound absorption resonance silencer, comprising: an internal combustion engine (power generation airflow), exhaust gas, and a reduced pressure rear end stage. A muffler used in steam safety valves and the like, with a simple structure, the purpose of the present invention is to have a sound attenuation performance that is effective in reducing frequency components in the low and mid range. 이를 위해 본 발명에서는 유체(Steam, 배기가스)가 통과하는 통로의 외부에 길이방향으로 다수개 배열되고, 내부에 관통된 홀을 가지는 중공형의 와셔;와 상기 와셔의 외부를 감싸면서 형성되어 공명음을 저감시키면서 흡음재의 비산을 방지하도록 다수개의 타공이 관통형성된 타공판;와 상기 타공판의 외측에는 형성되어 소음을 흡음하는 흡음재;와 상기 흡음재의 외측을 둘러싼 마감재가 포함되어 형성되는 것을 특징으로 하는 흡음공명형 소음기가 제안된다. To this end, in the present invention, a plurality of hollow washers are arranged in the longitudinal direction outside the passage through which the fluid (Steam, exhaust gas) passes, and has a hole penetrated therein; Perforated plate through which a plurality of perforations are formed to prevent the sound-absorbing material from scattering while reducing the sound; and a sound-absorbing material which is formed on the outside of the perforated plate to absorb noise; and a finishing material surrounding the outside of the sound-absorbing material A resonance silencer is proposed. 와셔, 타공판, 흡음재, 소음기 Washers, Perforated Plates, Sound Absorbers, Silencers

Improved heat exchange and noise reduction panel for gas turbine engine

FIELD: engines and pumps.SUBSTANCE: heat exchange and noise reduction panel for a gas turbine engine, in particular an aircraft gas turbine engine, comprises outer surface (22), which is intended for air flow blowing and starting from which there are plates (26) in predetermined first and second main directions, wherein cavities (20) form Helmholtz resonators and are connected to first ends (30) of air channels, which second ends are connected to said air flow so that said channels form narrowing of said Helmholtz resonators, passing substantially in first direction, at least one oil chamber (16) located between said outer surface and said at least one cavity and configured to remove thermal energy imparted by oil, wherein said channels are at least partially made in said plates.EFFECT: proposed improved heat exchange and noise reduction panel for gas turbine engine.10 cl, 11 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 689 264 C2 (51) МПК F02C 7/24 (2006.01) F28D 9/00 (2006.01) F28F 3/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F02C 7/24 (2019.02); F28D 9/0081 (2019.02); F28F 3/027 (2019.02) (21)(22) Заявка: 2017111373, 23.10.2015 (24) Дата начала отсчета срока действия патента: Дата регистрации: 24.05.2019 29.10.2014 FR 1460375 (43) Дата публикации заявки: 30.11.2018 Бюл. № 34 (56) Список документов, цитированных в отчете о поиске: US 8544531 B2, 01.10.2013. EP (45) Опубликовано: 24.05.2019 Бюл. № 15 1612769 A3, 25.03.2009. EP 1916399 A3, 28.09.2011. RU 2042547 C1, 27.08.1995. RU 2328382 C1, 10.07.2008. RU 71600 U1, 20.03.2008. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.05.2017 (86) Заявка PCT: FR 2015/052856 (23.10.2015) C 2 C 2 (73) Патентообладатель(и): САФРАН ЭРКРАФТ ЭНДЖИНЗ (FR) (87) Публикация заявки PCT: 2 6 8 9 2 6 4 WO 2016/066936 (06.05.2016) R U 2 6 8 9 2 6 4 Приоритет(ы): (30) Конвенционный приоритет: R U 23.10.2015 (72) Автор(ы): ВАИССИ Беллал (FR), ШАЛО ...

Muffler with multi-resonator for construction equipment

본 발명은 다중 공명기 삽입 건설장비용 소음기에 관한 것으로, 그 목적은 엔진의 배기가스 소음을 저감하는 소음기 내부에 다중 공명기를 구비하여 여러 주파수 대역의 소음을 저감시킬 수 있는 다중 공명기 삽입 소음기를 제공하는 데 있다. 본 발명의 구성은 원통형 소음기 케이스(1)와; 상기 케이스(1)의 측방향으로 관통된 다공구조의 배기가스 유입관(2)과; 케이스의 일측단에서 일정 간격만큼 이격되게 설치되어 공간부를 격리시켜 주요 주파수 대역의 소음을 저감시키는 가진 제 1공명기(3)를 형성하는, 목관(13)이 설치된 원판 구조의 제 1배플(4)과; 케이스의 타 측단에서 일정 간격만큼 이격되게 설치되어 공간부를 격리시켜 상기 제 1공명기와 다른 주파수 대역의 소음을 저감시키는 제 2공명기(5)를 형성하는, 목관(15)이 형성된 원판구조의 제 2배플(6)과; 상기 제 1배플(4)과 제 2배플(6)사이에 설치되어 케이스 내부 공간을 격리시키는 제 3배플(11) 및 제 4배플(12)과; 상기 제 3배플(11) 및 제 4배플(12)이 형성하는 공간부 상부에서 케이스를 관통하여 설치된 배기가스 배출구(19)와; 상기 케이스의 길이 방향으로 설치되어 상기 제 1, 2, 3, 4배플(4, 6, 11, 12) 중 어느 하나 이상을 관통하는 양 측단이 막히고 둘레는 다공구조로 이루어진 제 1, 3, 4 다공관(7, 8, 9, 10);을 포함하여 구성된 건설장비용 다중 공명기 삽입 소음기를 발명의 특징으로 한다. The present invention relates to a silencer for a multi-resonator insert construction machine, and an object of the present invention is to provide a multiple resonator silencer capable of reducing noise in various frequency bands by providing a multiple resonator in a silencer for reducing exhaust gas noise of an engine There is. The structure of the present invention comprises a cylindrical silencer case (1); An exhaust gas inflow pipe (2) of a porous structure penetrating in the lateral direction of the case (1); A first baffle 4 of a disk structure provided with a woodpipe 13 which forms an exciting first resonator 3 which is spaced apart from the one end of the case by a predetermined distance to isolate the space and reduce the noise of the main frequency band, and; And a second resonator (5) that is spaced apart from the other end of the case by a predetermined distance to isolate the space and reduce noise of a frequency band different from that of the first resonator, A baffle 6; A third baffle 11 and a fourth baffle 12 installed between the first baffle 4 and the second baffle 6 to isolate the case interior space; An exhaust gas outlet 19 provided above the space formed by the third baffle 11 and the fourth baffle 12 and penetrating the ...

Silencer

소음기가 개시된다. 본 발명의 실시예에 따른 소음기는 소음발생부에 결합되는 중공형 하우징; 및 상기 하우징의 내부에 배치되고, 상기 하우징의 길이방향으로 연장되는 흡음 장치를 포함하고, 상기 흡음 장치는, 상기 하우징의 길이방향으로 상호 결합되고, 소음을 저감시키는 흡음 유니트들을 포함한다. The muffler is started. A silencer according to an embodiment of the present invention includes a hollow housing coupled to a noise generating unit; And a sound-absorbing device disposed inside the housing and extending in the longitudinal direction of the housing, wherein the sound-absorbing device includes sound-absorbing units that are coupled to each other in the longitudinal direction of the housing and reduce noise.

There is the vehicle exhaust system of resisting force sheet

一种车辆排气系统，包括排气部件，排气部件具有外表面和限定排气部件内腔的内表面。至少一个孔形成于排气部件中以从外表面穿过排气部件的壁以延伸至内表面。构件由阻力材料形成并被构造成叠盖所述至少一个孔。至少一个隔离垫片被构造成使所述构件与排气部件的内表面或外表面间隔开以在所述构件与排气部件之间形成开放腔室。在一个示例中，致动器被构造成根据操作特性而覆盖和不覆盖所述构件以改变阻尼。

Muffler

一种用于内燃发动机驱动车辆排气系统的消音器，包括气密性外壳、设置在所述外壳内的至少一个分隔墙、至少一个入口管、至少一个第一出口管、至少一个可切换第二出口管和至少一个共振器管。所述至少一个分隔墙将所述外壳的内部分为第一体积和与所述第一体积分开的第二体积。所述至少一个入口管和至少一个第一出口管和至少一个可切换第二出口管和至少一个共振器管与第一体积流体连通。所述至少一个共振器管还与所述第二体积流体连通，从而提供所述第一体积和第二体积之间的流体连通。所述至少一个第二出口管经过第二体积，且至少在其穿过至少一个分隔墙的部分中，位于在该部分中圆周方向上完全包围第二出口管的至少一个共振器管内。

Intelligent noise elimination system for engineering machinery

本发明提供了应用于工程机械领域的一种用于工程机械的智能消声系统，该系统包括：机箱、进气管、导气管组、出气管、声音检测模块、切换模块和温度调节模块；机箱内设置有五个腔室和多个导管进行连通，使得噪音声波在多个腔室中得到了充分的反弹消除；设置有温度调节模块，当废气的温度过高时也会影响到消音的效率，一般温度越高，需要消音室的腔室的宽度越长，所以为了更有效地在有限的空间内达到最好的消音，设置了温度调节模块对废气和管道内环境的进行降温；水冷组件通过废气的动能带动螺旋桨转动从而带动设置管道中的冷却剂流动带走废气中的热能，从而实现了无源运作的功能。

Patent RU2017111373A3

ВУ” 2017111373” АЗ Дата публикации: 28.03.2019 Форма № 18 ИЗ,ПМ-2011 Федеральная служба по интеллектуальной собственности Федеральное государственное бюджетное учреждение ж 5 «Федеральный институт промышленной собственности» (ФИПС) ОТЧЕТ О ПОИСКЕ 1. . ИДЕНТИФИКАЦИЯ ЗАЯВКИ Регистрационный номер Дата подачи 2017111373/06(020141) 23.10.2015 РСТ/ЕК2015/052856 23.10.2015 Приоритет установлен по дате: [ ] подачи заявки [ ] поступления дополнительных материалов от к ранее поданной заявке № [ ] приоритета по первоначальной заявке № из которой данная заявка выделена [ ] подачи первоначальной заявки № из которой данная заявка выделена [ ] подачи ранее поданной заявки № [Х] подачи первой(ых) заявки(ок) в государстве-участнике Парижской конвенции (31) Номер первой(ых) заявки(ок) (32) Дата подачи первой(ых) заявки(ок) (33) Код страны 1. 1460375 29.10.2014 ЕК Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) УСОВЕРШЕНСТВОВАННАЯ ПАНЕЛЬ ТЕПЛООБМЕНА И УМЕНЬШЕНИЯ ШУМА ДЛЯ ГАЗОТУРБИННОГО ДВИГАТЕЛЯ Заявитель: САФРАН ЭРКРАФТ ЭНДЖИНЗ, ЕК 2. ЕДИНСТВО ИЗОБРЕТЕНИЯ [Х] соблюдено [ ] не соблюдено. Пояснения: см. Примечания 3. ФОРМУЛА ИЗОБРЕТЕНИЯ: [Х] приняты во внимание все пункты (см. Примечания) [ ] приняты во внимание следующие пункты: [ ] принята во внимание измененная формула изобретения (см. Примечания) 4. КЛАССИФИКАЦИЯ ОБЪЕКТА ИЗОБРЕТЕНИЯ (ПОЛЕЗНОЙ МОДЕЛИ) (Указываются индексы МПК и индикатор текущей версии) Е02С 7/24 (2006.01) Е280 9/00 (2006.01) Е25Е 3/02 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) 802С7/00, 7/04, 7/045, 7/12, 7/24, 2821/00, 1/03, 9/00, Е28Е3/00, 3/02 5.2 Другая проверенная документация в той мере, в какой она включена в поисковые подборки: 5.3 Электронные базы данных, использованные при поиске (название базы, и если, возможно, поисковые термины): СТРО, СМТРА, РЕРАТБ пе, О\/Р1, ЕАРАТТУ, Езрасепеф, ]-Р]а{Раь КРК, РАТЕМТЗСОРЕ, Ра еагсв, КОРТО, ИЗРТО 6. ДОКУМЕНТЫ, ...

The plate of heat exchange and improvement noise reduction for turbine

用于尤其是飞行器的涡轮机的热交换和降噪的板(10)，所述板包括：外表面(22)，所述外表面(22)意在被空气流扫过并且散热片(26)从外表面(22)沿着第一和第二主要预定方向延伸；空腔(20)，所述空腔(20)形成亥姆霍兹谐振器、被连接至用于通过空气的通道(30)的第一端，通道(30)的第二端与所述空气流连通，使得所述通道形成被称为亥姆霍兹谐振器的、基本上沿着第一方向延伸的颈部；和至少一个油流动室(16)，所述油流动室(16)在所述外表面和所述至少一个空腔之间延伸并且意在排放由油携带的热能，其特征在于，所述通道至少部分地形成在所述散热片的内部。

Silencer device of adaptable type

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Gas turbine combustion chamber with silencing wall structure

The inner walls (12,17) enclosing the combustion zone (23) are cooled by cooling air supplied from outside. A perforated plate (24) parallel with the inner walls is positioned in part of the outside of the inner walls and is spaced apart from them. The perforated plate with one inner wall (17) which has first openings (27) in it, forms an enclosed damping volume (26). The perforated plate has second openings (25) in it for bringing cool air from outside.

Gas turbine combustion chamber with silencing wall structure

a muffler for a vehicle

본 발명은 배플의 위치 및 공명실의 위치 등을 최적화하여 외부 소음 법규를 만족하면서 스포티 사운드를 구현할 수 있도록 한 자동차용 메인 소음기에 관한 것으로, The present invention relates to a main silencer for a vehicle that can realize a sporty sound while optimizing the position of the baffle and the position of the resonance room, while satisfying the external noise regulations, 종래의 자동차용 메인 소음기는 단순히 파이프 경로 변경 등을 통한 저주파 부밍과 고주파 기류음을 낮추는 것에만 관심을 가지고 있었으며, 아이들(IDLE) 및 저주파 부밍 감소를 위하여 배압 증대를 하게 되고, 이는 출력 저하 등의 악영향을 초래하게 되는 문제가 있었던 바, Conventional automotive main silencers were only concerned with lowering low frequency and high frequency airflow by simply changing pipe paths, and increasing back pressure to reduce idle and low frequency booming. There was a problem that caused adverse effects, 본체와; 본체의 내부에 이격 설치되는 4개의 배플과; 상기 각 배플의 전방과 후방에 마련되는 5개의 챔버와; 본체의 일측 상부에 설치되는 입구파이프와; 본체의 일측 하부 및 타측 중앙에 각각 설치되는 제1출구파이프 및 제2출구파이프;로 이루어지는 것과, 입구파이프의 제5챔버 통과부위에 타공부가 마련되어 제5챔버가 공명실의 역할을 하게 되며, 제2챔버와 제3챔버 사이의 제2배플에 고주파 감소 역할을 수행하는 타공부가 마련되는 것 등을 특징으로 하는 스포티 사운드를 구현하면서도 배압을 저감하여 엔진 출력을 증대할 수 있게 되며, 초기 발진 부밍을 증대할 수 있게 되고, 외부 소음 법규 만족을 위한 2,000RPM ~ 3,000RPM구간 이상 성분 감소할 수 있게 되며, 구조 단순화, 용량 축소, 이중튜브 삭제를 통해 원가 절감을 실현할 수 있게 되는 등의 효과를 얻을 수 있게 된다. A main body; Four baffles spaced apart from the inside of the main body; Five chambers provided at the front and the rear of each baffle; An inlet pipe installed at an upper portion of one side of the main body; The first outlet pipe and the second outlet pipe are respectively installed in the lower side and the other center of the main body; and the perforated part is provided in the passage portion of the fifth chamber of the inlet pipe, the fifth chamber serves as a resonance chamber, It is possible to increase the engine output by reducing the back pressure while implementing sporty sound, which is characterized in that the punching portion for performing a high frequency reduction role is provided in the second baffle between the second chamber and the third chamber. It is possible to increase the booming, ...

Noise silencer

一种消声器，包括具有用于接收气流的入口和用于排出气流的出口的壳体、用于引导壳体中的气流的导流装置和多腔谐振器。导流装置具有带有第一分支出口和第二分支出口的联结部。其中，第一分支出口通向多腔谐振器的谐振器颈部，第二分支出口通向一贯穿管，该贯穿管被设置成从入口到出口至少基本没有中断。