WO2003044366A1 - Insonorisation destinee a un moteur - Google Patents

Insonorisation destinee a un moteur Download PDF

Info

Publication number
WO2003044366A1
WO2003044366A1 PCT/NL2002/000759 NL0200759W WO03044366A1 WO 2003044366 A1 WO2003044366 A1 WO 2003044366A1 NL 0200759 W NL0200759 W NL 0200759W WO 03044366 A1 WO03044366 A1 WO 03044366A1
Authority
WO
WIPO (PCT)
Prior art keywords
engine
opening
sound insulating
sound
assembly
Prior art date
Application number
PCT/NL2002/000759
Other languages
English (en)
Inventor
Hendrik Johannes Bruin
Original Assignee
Holding H.J. Bruin B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NL1019418A external-priority patent/NL1019418C2/nl
Priority claimed from NL1019419A external-priority patent/NL1019419C2/nl
Application filed by Holding H.J. Bruin B.V. filed Critical Holding H.J. Bruin B.V.
Priority to GB0411924A priority Critical patent/GB2397636B/en
Priority to AU2002349574A priority patent/AU2002349574A1/en
Publication of WO2003044366A1 publication Critical patent/WO2003044366A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/06—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • F04B53/002—Noise damping by encapsulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two

Definitions

  • the invention relates to sound or noise insulation for a combustion engine, particularly a diesel engine, as used in generator sets.
  • the generator sets comprise a large housing in which the driven unit and the driving unit, the engine, have been placed.
  • the engine mostly is a single or twin cylinder engine which causes a loud surging noise.
  • Such generator sets are for instance used in pumping water, in so-called drainage by well points.
  • the inside of the case is lined with a sound insulating layer, such as synthetic foam.
  • a sound insulating layer such as synthetic foam.
  • a thick layer has to be used to that end.
  • this has disadvantageous consequences for the size and the weight of the housing.
  • a generator set comprising a case-shaped housing in which a driven unit and a driving combustion engine, particularly a diesel engine, have been placed, a sound insulating assembly having been arranged at at least one side of the engine which assembly is supported on the engine, comprising a first layer of elastic, sound insulating material abutting the engine and a body having a mass, which body is situated at the side of the insulating layer facing away from the engine and is supported by the first insulating layer.
  • the mass-possessing body in fact a weight-constituting body, here rests on the engine, that means immediately on the sound source, via an elastic, sound insulating layer. Sound muffling here takes place in two steps, the sound vibrations first being muffled in the first insulation layer and the sound vibrations that are transferred through the first insulation layer to the mass body being muffled by bringing the free supported mass body into motion.
  • the sound insulating material here is a synthetic foam having open cells.
  • the mass body extends over the first layer of insulating material, so that the sound muffling capacity is regularly distributed.
  • the mass body is plate shaped, as a result of which the structure height can remain limited.
  • the plate may consists of steel which is a cheap and heavy material.
  • the noise reduction is further increased when a second layer of sound insulating material has been arranged at the side of the mass body facing away from the engine. Any sound vibrations released at the outside of the mass body are then muffled as well. A kind of sandwich structure has been achieved.
  • the sound insulating assembly surrounds the engine as much as possible, at least the area around the head of the engine.
  • the sound insulating assembly is hood-shaped, sound muffling is realised in several directions in a structurally simple manner. It is preferred here that the hood surrounds the head of the engine to various sides: the portion of the engine producing the noise to be muffled is then immediately isolated.
  • the first insulating layer is in surface-to-surface contact with the engine.
  • the invention provides an assembly of a combustion engine, particularly a diesel engine, and a case-shaped housing around it, a sound insulating device having been arranged on the engine in a free supporting manner, comprising a first layer of elastic, sound insulating material abutting on and against the engine with surface-to-surface contact, and a body having a mass and situated at the side of the insulating layer facing away from the engine.
  • the sound insulating device has been provided with portions pendent over the sides of the engine and lying against it, particularly in the shape of a hood.
  • the housing has been provided with a lid above the engine, and the sound insulating device being connected to the lid for moving along with it.
  • the lid When the lid is swivelled open the sound insulating device is therewith lifted along away from the engine.
  • the application furthermore relates to a diesel generator set.
  • Such generator sets are used for many purposes, for instance for drainage by well points for carrying out civil constructional works.
  • the generator set comprises a case which at the inside may be provided with sound muffling material, for reducing the noise coming from the driving combustion engine and possibly the driven machine(s) .
  • a large part of the sound energy produced by the generator set is released at the exhaust side of the engine via the exhaust system.
  • a problem here is that usually single or twin cylinder engines are used, which due to their operating cycle distribution cause a very irregular exhaust gas flow, the noise of which being difficult to absorb. It particularly regards the loud bangs, sound surges, originating from the often used single or twin cylinder engines.
  • the application further provides a generator set device comprising a case-shaped housing in which a driven machine, such as a pump, and a combustion engine for driving the machine have been placed, the engine having an exhaust system, having a first exhaust portion connected to the engine, and a second exhaust portion debouching in the surroundings outside the housing, as well as a resonance box connecting both exhaust portions to each other, which resonance box connects with a first opening to the first exhaust portion and with a second opening connects to the second exhaust portion, the resonance box being provided with separation means for dividing the space between both openings in several channels of different lengths that have been arranged in parallel.
  • a generator set device comprising a case-shaped housing in which a driven machine, such as a pump, and a combustion engine for driving the machine have been placed, the engine having an exhaust system, having a first exhaust portion connected to the engine, and a second exhaust portion debouching in the surroundings outside the housing, as well as a resonance box connecting both exhaust portions to each other, which resonance box connects with a first opening to
  • the duration of the surge is lengthened, but the amplitude is reduced, and thus the noise intensity.
  • the sound in itself is utilised for achieving the noise intensity reduction.
  • Special, expensive measures with respect to the case of the generator set are not necessary. Due to the achieved pressure equalisation the second exhaust portion, such as a sound muffler, is better able to absorb the remaining noise.
  • the separation means are situated at a short distance downstream of the first opening, as a result of which the distribution of the surge takes place within the resonance box, which enhances the noise reduction, reducing the amplitude of the resulting sound waves.
  • the resistance against distribution of the pressure wave over the channel entrances is kept low, which is advantageous for the expansion possibilities of the entering noise surge.
  • the separation means end at a distance from the second opening.
  • the separation means end in an intermediate wall, in which for each channel a separate third opening is present, a common channel having been formed between the third openings and the second opening.
  • the channels then in fact form several separate resonance chambers.
  • the surge distribution is further enhanced when the third openings are situated at different distances from the second opening, in a sequence corresponding to the sequence of the channels formed at the upstream side of the intermediate wall.
  • the longest channels then connect to the longest paths to the second opening.
  • the volume of the channels preferably is as large as possible, for an increased resonance action in the case.
  • the sum of the third openings is as small as possible, preferably smaller than the size of the first opening.
  • the channels are parallel to each other, and preferably separated from each other by longitudinal partitions. In this way a case can be divided in a simple way, and the strength is also increased.
  • the invention further relates to a resonance box suitable and intended for the device according to the invention described above.
  • the resonance box forms a unity with the sound muffler connected behind it.
  • Figure 1 shows a front view, broken away, of a pump generator set having a sound muffling assembly according to the invention
  • Figure 2 shows a detail of the engine of the generator set of figure 1 , having a sound muffling assembly according to the invention
  • Figure 3 shows the generator set of figure 1 , with an opened lid
  • Figure 4 shows a front view, broken away, of a pump generator set having a resonance box according to the invention
  • Figure 5 shows an exemplary embodiment of a resonance box according to the invention.
  • the pump generator set 1 shown as an example in figure 1 comprises a housing 30, placed on a solid basis 20 by means of legs 21 .
  • a pump 2 has been arranged, to which a suction line 4 and a pressure line 3 have been connected.
  • the suction line 4 will in many cases be connected to a system for drainage by well points and the pressure line 3 will be connected to a pipe leading a surface water.
  • the pump 2 is a suction pump, having cylinder 5, in which a piston rod 7 is reciprocally movable.
  • the piston rod 7 is driven by means of drive mechanism 6, which is driven by a single cylinder engine 8, by means of drive 22.
  • the exhaust gases of the engine 8 go to the exhaust pipe 1 9 via muffler 10 where they are released to the surroundings.
  • an hour counter 33 and a cooling air connection 34 are situated at the upper side of the engine.
  • a lid 1 3 is situated above the engine, and at the front of the engine, as shown in figure 3, there is a door 1 1 .
  • a sound muffling assembly 1 2 has been freely supported on the head 9, having filter 32, of the engine 8, which sound muffling assembly is substantially hood-shaped having an upper wall 23 and a circumferential wall 24, in which as can be seen in figures 2 and 3, wall members 24a, 24b, 24c, 24d and 24e can be distinguished.
  • the circumferential wall 24 and the upper wall 23 as well have been formed with a fitting shape to the head 9 and the filter 32 of the engine 8. Only at the front no pendent wall 24 is present as the resonance box 34 has been placed there.
  • hood 1 2 is shown schematically only, like an U-shaped structure.
  • the hood 1 2 has been built up like a sandwich structure, having a layer 14 of synthetic foam having open cells, for instance polyester or polyether foam, a steel plate 1 5 lying on the foam layer 14, and a same synthetic foam layer 1 6 on the steel plate 1 5. Layers 14 and 1 6 have been adhered to the plate 1 5 with a suitable adhesive.
  • the hood 1 2 has been formed such in accordance with the head 9 of the engine 8, so that it is freely supported on it.
  • the thickness of the steel plate is several millimetres, for instance 2 to 3 millimetres, or more.
  • the hood 1 2 has been suspended from the lower side of the lid 1 3 of the housing 30 by means of rubber rings 1 7a, 1 7b at the location of suspension points 1 8a, 1 8b.
  • the weight of the plate 1 5 ensures that the foam layer 14 always remains in good contact with the head 9 of the engine 8. Due to its free position, the hood 1 2 does not produce vibrations transferred by contact to the construction parts of the housing 30. The hood 1 2 in fact vibrates freely.
  • a pump generator set 101 shown in figure 4 comprises a housing 130 placed on a solid basis 120 by means of legs 121.
  • a pump 102 has been arranged, to which a suction line 104 extending from a side wall 109 and a pressure line 103 have been connected.
  • the suction line 104 will in many cases be connected to a system of drainage by well points, and the pressure line 103 will be connected to a pipe leading to a surface water.
  • the pump 102 is a piston pump, having cylinder 105, in which a piston rod 107 is reciprocally moveable.
  • the piston rod 107 is driven by means of drive mechanism 106, which is driven by a single cylinder engine 108 by means of drive 122.
  • a first exhaust pipe 119 ensures discharge of combustion gases of the engine 108 and runs to a case 110 in which a resonance box 130 and a sound muffler 131 have been accommodated in series, surrounded by thermal insulation 132, arranged in the right end wall 109 of the housing
  • Exhaust stub 128 extends from the sound muffler 131, which exhaust stub debouches at the outside of the end wall 109.
  • a number of channels 116 are present in the resonance box 130 for forming a connection between inlet opening 112 and exhaust opening 113.
  • the resonance box 130 is shown in broken away isometric view, longitudinal walls 114 and end walls 125 being distinguishable, as well as main walls 123, 124. In between them they define a parallelepiped- shaped space.
  • the inlet opening 112 is situated eccentrically, near a corner in the upper wall 123.
  • a special aspect of the resonance box 130 of figure 5 is that a number of - in this case two- longitudinal partitions 115a, 115b have been arranged, parallel to the longitudinal walls 114, in order to form three channels of equal cross-section 116a, 116b and 116c with them and each other.
  • the partitions 115a, 115b At their upstream end, the partitions 115a, 115b have been turned at a right angle by portions 127a, 127b which extend along with the flow, as considered from inlet opening 112, and reinforce the walls 115a, 115b to prevent material resonances (acoustic feedback).
  • the partitions 115a, 115b end in a transverse wall 118 which is parallel to the end walls 125, and defines a chamber 126 with the downstream end wall 125.
  • the exhaust opening 113 is located in the bottom of the chamber 126, which exhaust opening has a cross-section which is smaller than the cross-section of the inlet opening 112.
  • the exhaust opening 113 is situated near the longitudinal wall 114, near to which the inlet opening 112 is also situated, however in the other main wall.
  • the transverse wall 118 has been provided with three openings 117a, 117b and 117c, the sum of which being smaller than the opening 112. They are situated near the bottom wall 124 and form a passage between the channels 116a, 116b and 116c and the chamber 126.
  • the minimal passage in the openings 117a-c is defined by the maximum allowable counter pressure for the engine which depends on the type of engine, stroke volume, rotational speed and load, as well as the size of the resonance chambers.
  • partitions 1 1 1 5a, 1 1 5b it is achieved that the pressure surges in the exhaust system, as a result of the loud bangs of the engine, which in particular may be case with single cylinder engines, in the path of the inlet opening 1 1 2 to the exhaust opening 1 1 3 in the front chamber 1 35, are as it were cut into three parts, each having to go different path lengths.
  • the first portion of the pressure surge will move in the direction B1 through channel 1 1 6a, a second portion in channel 1 1 6b in direction B2, and a third portion in channel 1 1 6c in the direction B3.
  • the different portions of the pressure surge have traversed different path lengths. In this way a surge shifting is achieved, and the pressure surge is indeed lengthened, but with a lower noise intensity, which is what it is all about.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un ensemble de générateur comprenant un boîtier en forme de boîte dans lequel une unité d'entraînement et un moteur d'entraînement à combustion, notamment un moteur diesel, ont été placés. Cet ensemble comprend également un ensemble d'insonorisation disposé sur au moins un côté du moteur, cet ensemble étant supporté sur le moteur, et comprenant une première couche de matériau élastique d'insonorisation venant en butée avec le moteur, et un corps ayant une masse, ce corps étant situé sur le côté de la couche d'insonorisation opposé au moteur et supporté par la première couche d'insonorisation.
PCT/NL2002/000759 2001-11-23 2002-11-22 Insonorisation destinee a un moteur WO2003044366A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0411924A GB2397636B (en) 2001-11-23 2002-11-22 Sound insulation for engine
AU2002349574A AU2002349574A1 (en) 2001-11-23 2002-11-22 Sound insulation for engine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL1019418A NL1019418C2 (nl) 2001-11-23 2001-11-23 Aggregaat.
NL1019418 2001-11-23
NL1019419A NL1019419C2 (nl) 2001-11-23 2001-11-23 Geluidsisolatie voor motor.
NL1019419 2001-11-23

Publications (1)

Publication Number Publication Date
WO2003044366A1 true WO2003044366A1 (fr) 2003-05-30

Family

ID=26643414

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2002/000759 WO2003044366A1 (fr) 2001-11-23 2002-11-22 Insonorisation destinee a un moteur

Country Status (3)

Country Link
AU (1) AU2002349574A1 (fr)
GB (1) GB2397636B (fr)
WO (1) WO2003044366A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1033012C2 (nl) * 2006-12-07 2008-06-10 B B A Participaties B V Oliecarter voor een dieselmotor, dieselmotor voorzien van een dergelijk oliecarter en gebruik van een dergelijke dieselmotor.
CN103867427A (zh) * 2012-12-14 2014-06-18 倪伟华 一种可方便移动的托泵
CN113787962A (zh) * 2021-09-16 2021-12-14 东风汽车集团股份有限公司 一种主动声浪装置的发声控制方法及系统

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048366A (en) * 1974-07-26 1977-09-13 British Uralite Limited Noise control materials
DE9113113U1 (de) * 1991-10-22 1993-02-25 Robert Bosch Gmbh, 7000 Stuttgart Stromerzeuger mit Lärmschutzvorrichtung
DE4202640A1 (de) * 1992-01-30 1993-08-05 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgeraet
JPH05312036A (ja) * 1992-05-09 1993-11-22 Kubota Corp 防音型エンジン発電機のマフラ装置
US5276291A (en) * 1992-07-10 1994-01-04 Norris Thomas R Acoustic muffler for high volume fluid flow utilizing Heimholtz resonators with low flow resistance path
JPH0874595A (ja) * 1994-09-09 1996-03-19 Denyo Kk 防音型エンジン駆動発電機の組立方法とその装置
JPH09134179A (ja) * 1995-11-07 1997-05-20 Isuzu Motors Ltd 振動・騒音発生源の遮蔽カバー装置
WO1998020237A2 (fr) * 1996-11-04 1998-05-14 Flowmaster, Inc. Silencieux ameliore a serie de cloisons
WO1999058824A1 (fr) * 1998-05-14 1999-11-18 Tom Erik Jacoby Silencieux pour debits de gaz
JP2001152847A (ja) * 1999-11-24 2001-06-05 Matsusaka Engineering:Kk 防音型エンジンポンプ
JP2001182552A (ja) * 1999-10-12 2001-07-06 Tokai Rubber Ind Ltd エンジンカバー

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048366A (en) * 1974-07-26 1977-09-13 British Uralite Limited Noise control materials
DE9113113U1 (de) * 1991-10-22 1993-02-25 Robert Bosch Gmbh, 7000 Stuttgart Stromerzeuger mit Lärmschutzvorrichtung
DE4202640A1 (de) * 1992-01-30 1993-08-05 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgeraet
JPH05312036A (ja) * 1992-05-09 1993-11-22 Kubota Corp 防音型エンジン発電機のマフラ装置
US5276291A (en) * 1992-07-10 1994-01-04 Norris Thomas R Acoustic muffler for high volume fluid flow utilizing Heimholtz resonators with low flow resistance path
JPH0874595A (ja) * 1994-09-09 1996-03-19 Denyo Kk 防音型エンジン駆動発電機の組立方法とその装置
JPH09134179A (ja) * 1995-11-07 1997-05-20 Isuzu Motors Ltd 振動・騒音発生源の遮蔽カバー装置
WO1998020237A2 (fr) * 1996-11-04 1998-05-14 Flowmaster, Inc. Silencieux ameliore a serie de cloisons
WO1999058824A1 (fr) * 1998-05-14 1999-11-18 Tom Erik Jacoby Silencieux pour debits de gaz
JP2001182552A (ja) * 1999-10-12 2001-07-06 Tokai Rubber Ind Ltd エンジンカバー
JP2001152847A (ja) * 1999-11-24 2001-06-05 Matsusaka Engineering:Kk 防音型エンジンポンプ

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 123 (M - 1568) 28 February 1994 (1994-02-28) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 09 30 September 1997 (1997-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 23 10 February 2001 (2001-02-10) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 24 11 May 2001 (2001-05-11) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1033012C2 (nl) * 2006-12-07 2008-06-10 B B A Participaties B V Oliecarter voor een dieselmotor, dieselmotor voorzien van een dergelijk oliecarter en gebruik van een dergelijke dieselmotor.
EP1947302A3 (fr) * 2006-12-07 2011-03-09 B.B.A. Participaties B.V. Carter d' huile pour un moteur diesel, moteur diesel pourvu d' un tel carter d' huile et usage d'un tel moteur diesel
CN103867427A (zh) * 2012-12-14 2014-06-18 倪伟华 一种可方便移动的托泵
CN113787962A (zh) * 2021-09-16 2021-12-14 东风汽车集团股份有限公司 一种主动声浪装置的发声控制方法及系统
CN113787962B (zh) * 2021-09-16 2023-06-27 东风汽车集团股份有限公司 一种主动声浪装置的发声控制方法及系统

Also Published As

Publication number Publication date
GB2397636A (en) 2004-07-28
AU2002349574A1 (en) 2003-06-10
GB2397636B (en) 2005-08-10
GB0411924D0 (en) 2004-06-30

Similar Documents

Publication Publication Date Title
JP3615145B2 (ja) 消音器
EP1304480B1 (fr) Silencieux d'aspiration pour compresseur
CN108915997B (zh) 消声器、压缩机组件及冰箱
JP2008540891A (ja) 冷却コンプレッサ用サクションマフラ
CN113357129B (zh) 一种排气降噪结构、压缩机及制冷设备
JPH06213156A (ja) 密閉型往復動式圧縮機の騒音減少装置
JP2000320479A (ja) 多気筒密閉型圧縮機
JP4232235B2 (ja) マフラー
JPH08105381A (ja) 圧縮機
WO2003044366A1 (fr) Insonorisation destinee a un moteur
CN201037455Y (zh) 一种新型缩腔结构消音器
EP1771660B1 (fr) Compresseur
CN105863784B (zh) 增强型消声器
CN201377405Y (zh) 一种外壳结构改进的冰箱压缩机
RU19555U1 (ru) Глушитель шума
CN210440220U (zh) 压缩机和制冷设备
JP6169035B2 (ja) 燃料電池車の排気音の消音構造
CN208534575U (zh) 一种汽车排气消音器
JP3712664B2 (ja) 防音型発電装置
KR20110136391A (ko) 자동차용 소음기
CN205559037U (zh) 用于消声器的导流罩
JP6742790B2 (ja) 排気消音装置
KR100311132B1 (ko) 내연기관의 레조네이터
CN201037456Y (zh) 一种排气孔为偶极子反相结构的消音器
JPH11311180A (ja) 密閉型電動圧縮機

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

ENP Entry into the national phase

Ref document number: 0411924

Country of ref document: GB

Kind code of ref document: A

Free format text: PCT FILING DATE = 20021122

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP