EP0455622A1 - Intake silencer, in particular for two stroke internal combustion engines - Google Patents

Intake silencer, in particular for two stroke internal combustion engines Download PDF

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Publication number
EP0455622A1
EP0455622A1 EP91890079A EP91890079A EP0455622A1 EP 0455622 A1 EP0455622 A1 EP 0455622A1 EP 91890079 A EP91890079 A EP 91890079A EP 91890079 A EP91890079 A EP 91890079A EP 0455622 A1 EP0455622 A1 EP 0455622A1
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EP
European Patent Office
Prior art keywords
chamber
inlet pipe
intake silencer
connecting pipes
partition
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Legal status (The legal status 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 status listed.)
Granted
Application number
EP91890079A
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German (de)
French (fr)
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EP0455622B1 (en
Inventor
Christian Dipl. Ing. Beidl
Albin Sterbenz
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Individual
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Publication of EP0455622A1 publication Critical patent/EP0455622A1/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/14—Combined air cleaners and silencers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1227—Flow throttling or guiding by using multiple air intake flow paths, e.g. bypass, honeycomb or pipes opening into an expansion chamber
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the invention relates to an intake silencer with an air filter, in particular for two-stroke internal combustion engines, consisting of a rigid housing which is divided by a partition into two chambers which are connected by at least two pipes passing through the partition, the first larger chamber having an inlet pipe and one Has filter insert and the second chamber is provided with an outlet nozzle.
  • Such an intake silencer is already known in practice. It has a simple cylindrical, non-subdivided inlet pipe and there is usually only a single connecting pipe. However, if two or more such connecting pipes are provided, they have the same diameter and the same length. The muffler is only flowed through in one direction.
  • the disadvantage here is that in relation to the pipe length resulting in favorable acoustic values and the pipe diameter, which is also acoustically favorable, there is a high pressure loss, which naturally reduces the engine output. Due to the single connecting pipe or several connecting pipes of the same length, there is a risk of pronounced natural frequencies, which lead to unpleasant noises and a higher sound level. Since the muffler is only flowed through in one direction, the damping is poorer due to the lack of appropriate reflections.
  • the invention is therefore based on the object of providing an intake silencer of the type described at the outset, which ensures good sound absorption even with high engine output.
  • the invention achieves the stated object in that the inlet pipe consists of a diffuser divided into two or more channels of different lengths and that the connecting pipes connecting the two chambers have different diameters and / or lengths in a manner known per se.
  • the inlet pipe is designed as a diffuser, there are lower pressure losses without having to enlarge the diameter and thereby achieve poorer acoustic values.
  • the channels of different lengths in the diffuser make a significant contribution to improving the damping caused by interference. Due to the different dimensions of the connecting pipes, the formation of pronounced natural frequencies is suppressed, which also improves noise reduction.
  • the inlet pipe forming the diffuser is arranged opposite the connecting pipes or these opposite the outlet pipe in the sense of reversing the direction of flow in the first and / or second chamber.
  • an insulating insert which is separated from the housing wall by an air gap is provided in the second chamber. This insulating insert reduces the sound transmission to the housing and thus the sound radiation from the housing surface.
  • Different lengths of the pipes or channels are achieved in the simplest way in that the outlet end of the inlet pipe and at least one of the two ends of the connecting pipes each have an edge which is oblique to the pipe axis.
  • the intake silencer has a rigid housing 1, which is divided into two chambers 1a, 1b by a partition 2.
  • the partition 2 is interrupted by three connecting pipes 3, 4, 5, which lead from the chamber 1a into the chamber 1b.
  • the chamber 1a has an inlet pipe 6 which forms a diffuser which is divided into four channels 8 of different lengths by a cross-shaped insert 7. The different length of these channels 8 will achieved in that the outlet end of the inlet tube 6 has an edge 9 inclined to the tube axis.
  • An air filter 10 is inserted in the chamber 1a.
  • the three connecting pipes 3, 4, 5 have different diameters and, due to their likewise inclined edge 9a, also have different lengths.
  • An outlet connection 11 leads from the chamber 1b to the internal combustion engine.
  • the arrangement of the inlet pipe 6 with respect to the connecting pipes 3, 4, 5 or the latter with respect to the outlet connection 11 is provided such that the direction of flow of the sucked-in air reverses both in the first larger chamber 1a and in the second chamber 1b.
  • an insulation insert 12 is provided which is separated from the housing wall by an air gap in order to reduce the sound transmission to the housing 1 and thus to radiate sound from the housing surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

Ein insbesondere für Zweitakt-Brennkraftmaschinen bestimmter Ansauggeräuschdämpfer mit Luftfilter (10) besteht aus einem durch eine Trennwand (2) in zwei Kammern (1a, 1b) unterteilten steifen Gehäuse (1). In die größere erste Kammer (1a) führt ein Eintrittsrohr (6), die Trennwand (2) ist von wenigstens zwei Verbindungsrohren (3, 4, 5) unterbrochen und die zweite Kammer (1b) weist einen Austrittsstutzen (11) auf. Um auch bei hoher Motorleistung eine gute Schalldämpfung zu erreichen, bildet das Eintrittsrohr (1) einen in zwei oder mehrere Kanäle (8) unterschiedlicher Länge unterteilten Diffusor und die Verbindungsrohre (3, 4, 5) weisen unterschiedliche Durchmesser und/oder Längen auf. <IMAGE>An intake noise damper with an air filter (10), which is particularly intended for two-stroke internal combustion engines, consists of a rigid housing (1) divided into two chambers (1a, 1b) by a partition (2). An inlet pipe (6) leads into the larger first chamber (1a), the partition (2) is interrupted by at least two connecting pipes (3, 4, 5) and the second chamber (1b) has an outlet connection (11). In order to achieve good sound absorption even with high engine output, the inlet pipe (1) forms a diffuser divided into two or more channels (8) of different lengths, and the connecting pipes (3, 4, 5) have different diameters and / or lengths. <IMAGE>

Description

Die Erfindung betrifft einen Ansauggeräuschdämpfer mit Luftfilter, insbesondere für Zweitakt-Brennkraftmaschinen, bestehend aus einem steifen Gehäuse, das durch eine Trennwand in zwei Kammern unterteilt ist, die durch wenigstens zwei die Trennwand durchsetzende Rohre verbunden sind, wobei die erste größere Kammer ein Eintrittsrohr sowie einen Filtereinsatz aufweist und die zweite Kammer mit einem Austrittsstutzen versehen ist.The invention relates to an intake silencer with an air filter, in particular for two-stroke internal combustion engines, consisting of a rigid housing which is divided by a partition into two chambers which are connected by at least two pipes passing through the partition, the first larger chamber having an inlet pipe and one Has filter insert and the second chamber is provided with an outlet nozzle.

Ein derartiger Ansauggeräuschdämpfer ist aus der Praxis bereits bekannt. Dabei besitzt dieser ein einfach zylindrisches nicht unterteiltes Eintrittsrohr, und es ist auch meist nur ein einziges Verbindungsrohr vorhanden. Falls aber zwei oder mehrere solche Verbindungsrohre vorgesehen sind, besitzen diese gleiche Durchmesser und gleiche Längen. Der Geräuschdämpfer wird nur in einer Richtung durchströmt.Such an intake silencer is already known in practice. It has a simple cylindrical, non-subdivided inlet pipe and there is usually only a single connecting pipe. However, if two or more such connecting pipes are provided, they have the same diameter and the same length. The muffler is only flowed through in one direction.

Nachteilig ist hiebei, daß sich im Verhältnis zu der günstige akustische Werte ergebenden Rohrlänge und dem ebenfalls in akustischer Hinsicht günstigen Rohrdurchmesser ein hoher Druckverlust einstellt, der naturgemäß die Motorleistung herabsetzt. Durch das einzige Verbindungsrohr oder mehrere gleich lange Verbindungsrohre besteht die Gefahr ausgeprägter Eigenfrequenzen, die zu unangenehmen Geräuschen und einem höheren Schallpegel führen. Da der Geräuschdämpfer nur in einer Richtung durchströmt wird, kommt es mangels entsprechender Reflexionen zu einer schlechteren Dämpfung.The disadvantage here is that in relation to the pipe length resulting in favorable acoustic values and the pipe diameter, which is also acoustically favorable, there is a high pressure loss, which naturally reduces the engine output. Due to the single connecting pipe or several connecting pipes of the same length, there is a risk of pronounced natural frequencies, which lead to unpleasant noises and a higher sound level. Since the muffler is only flowed through in one direction, the damping is poorer due to the lack of appropriate reflections.

Es ist zwar auch schon bekannt (AT-PS 235 089), zwischen einzelnen Kammern eines Dämpffilters Rohre mit unterschiedlicher Länge und unterschiedlichem Durchmesser vorzusehen, jedoch handelt es sich hiebei um eine ganz andere Konstruktion mit einem Reinluftraum, einer benachbarten Sekundärdämpferkammer, einer Zwischendämpferkammer und einer Primärdämpferkammer. Das Reinluftrohr führt aus der Reinluftkammer unmittelbar zum Auslaß und hat nur Schlitze in der Zwischenkammer und der Primärdämpferkammer, wogegen ein kürzeres Rohr kleineren Durchmessers von der Reinluftkammer nur in die Sekundärdämpferkammer reicht, die keine Austrittsöffnung besitzt. Es liegt also eine vergleichsweise komplizierte Blechausführung vor, bei der sich ganz andere Verhältnisse ergeben.It is also already known (AT-PS 235 089) to provide pipes of different lengths and different diameters between individual chambers of a steam filter, however, it is a completely different construction with a clean air space, an adjacent secondary damper chamber, an intermediate damper chamber and a primary damper chamber. The clean air tube leads directly from the clean air chamber to the outlet and has only slots in the intermediate chamber and the primary damper chamber, whereas a shorter tube of smaller diameter only extends from the clean air chamber into the secondary damper chamber, which has no outlet opening. So there is a comparatively complicated sheet metal design, with completely different conditions.

Somit liegt der Erfindung die Aufgabe zugrunde, einen Ansauggeräuschdämpfer der eingangs geschilderten Art zu schaffen, der eine gute Schalldämpfung auch bei hoher Motorleistung gewährleistet.The invention is therefore based on the object of providing an intake silencer of the type described at the outset, which ensures good sound absorption even with high engine output.

die Erfindung löst die gestellte Aufgabe dadurch, daß das Eintrittsrohr aus einem in zwei oder mehrere Kanäle unterschiedlicher Länge unterteilten Diffusor besteht und daß die die beiden Kammern verbindenden Verbindungsrohre in an sich bekannter Weise unterschiedliche Durchmesser und/oder Längen aufweisen.The invention achieves the stated object in that the inlet pipe consists of a diffuser divided into two or more channels of different lengths and that the connecting pipes connecting the two chambers have different diameters and / or lengths in a manner known per se.

Da das Eintrittsrohr als Diffusor ausgebildet ist, ergeben sich geringere Druckverluste, ohne den Durchmesser vergrössern zu müssen und dadurch schlechtere akustische Werte zu erzielen. Die im Diffusor verhandenen Kanäle unterschiedlicher Länge tragen zur Verbesserung der Dämpfung durch Interferenzerscheinungen wesentlich bei. Durch die verschiedenen Abmessungen der Verbindungsrohre wird die Ausbildung ausgeprägter Eigenfrequenzen unterdrückt, was ebenfalls die Geräuschdämpfung verbessert.Since the inlet pipe is designed as a diffuser, there are lower pressure losses without having to enlarge the diameter and thereby achieve poorer acoustic values. The channels of different lengths in the diffuser make a significant contribution to improving the damping caused by interference. Due to the different dimensions of the connecting pipes, the formation of pronounced natural frequencies is suppressed, which also improves noise reduction.

In weïterer Ausbildung der Erfindung sind das den Diffusor bildende Eintrittsrohr gegenüber den Verbindungsrohren bzw. diese gegenüber dem Austrittsstutzen im Sinne einer Umkehr der Stömungsrichtung in der ersten und/oder zweiten Kammer angeordnet. Dadurch wird eine Verbesserung der Dampfung durch zusätzliche Reflexionen ohne Vergrößerung der querschnitte bzw. Volumina erzielt.In a further embodiment of the invention, the inlet pipe forming the diffuser is arranged opposite the connecting pipes or these opposite the outlet pipe in the sense of reversing the direction of flow in the first and / or second chamber. As a result, the damping is improved by additional reflections without increasing the cross sections or volumes.

Besonders zweckmäßig ist es auch, wenn in der zweiten Kammer ein von der Gehäusewand durch einen Luftspalt getrennter Dämmeinsatz vorgesehen ist. Dieser Dämmeinsatz verringert die Schallübertragung auf das Gehäuse und damit die Schallabstrahlung von der Gehäuseoberfläche.It is also particularly expedient if an insulating insert which is separated from the housing wall by an air gap is provided in the second chamber. This insulating insert reduces the sound transmission to the housing and thus the sound radiation from the housing surface.

Verschiedene Längen der Rohre bzw. Kanäle werden auf die einfachste Weise dadurch erreicht, daß das Austrittsende des Eintrittsrohres und wenigstens eines der beiden Enden der Verbindungsrohre jeweils einen zur Rohrachse schrägen Rand aufweisen.Different lengths of the pipes or channels are achieved in the simplest way in that the outlet end of the inlet pipe and at least one of the two ends of the connecting pipes each have an edge which is oblique to the pipe axis.

In der Zeichnung ist der Erfindungsgegenstand in einem Ausführungsbeispiel dargestellt, und zwar zeigen

  • Fig. 1 einen Ansauggeräuschdämpfer im Längsschnitt nach der Linie I-I der Fig. 2 und
  • Fig. 2 einen zugehörigen Querschnitt nach der Linie IIII der Fig. 1.
In the drawing, the subject of the invention is shown in one embodiment, namely show
  • Fig. 1 shows an intake silencer in longitudinal section along the line II of Fig. 2 and
  • 2 shows an associated cross section along the line IIII of FIG. 1st

Der Ansauggeräuschdämpfer weist ein steifes Gehäuse 1 auf, das durch eine Trennwand 2 in zwei Kammern 1a, 1b, unterteilt ist. Die Trennwand 2 ist durch drei Verbindungsrohre 3, 4, 5, die von der Kammer 1a in die Kammer 1b führen, unterbrochen. Die Kammer 1a weist ein Eintrittsrohr 6 auf, das einen Diffusor bildet, der durch einen kreuzförmigen Einsatz 7 in vier Kanäle 8 unterschiedlicher Länge unterteilt ist. Die unterschiedliche Länge dieser Kanäle 8 wird dadurch erreicht, daß das Austrittsende des Eintrittsrohres 6 einen zur Rohrachse schrägen Rand 9 aufweist. In der Kammer 1a ist ein Luftfilter 10 eingesetzt.The intake silencer has a rigid housing 1, which is divided into two chambers 1a, 1b by a partition 2. The partition 2 is interrupted by three connecting pipes 3, 4, 5, which lead from the chamber 1a into the chamber 1b. The chamber 1a has an inlet pipe 6 which forms a diffuser which is divided into four channels 8 of different lengths by a cross-shaped insert 7. The different length of these channels 8 will achieved in that the outlet end of the inlet tube 6 has an edge 9 inclined to the tube axis. An air filter 10 is inserted in the chamber 1a.

Die drei Verbindungsrohre 3, 4, 5 weisen unterschiedliche Durchmesser und durch ihren ebenfalls schrägen Rand 9a auch unterschiedliche Längen auf. Von der Kammer 1b führt ein Austrittsstutzen 11 zur Brennkraftmaschine. Dabei ist die Anordnung des Einrtittsrohres 6 gegenüber den Verbindungsrohren 3, 4, 5 bzw. der letzteren gegenüber dem Austrittsstutzen 11 so vorgesehen, daß sich die Strömungsrichtung der angesaugten Luft sowohl in der ersten größeren Kammer 1a als auch in der zweiten Kammer 1b umkehrt. In der zweiten Kammer 1b ist zur Verminderung der Schallübertragung auf das Gehäuse 1 und damit zur Schallabstrahlung von der Gehäuseoberfläche ein von der Gehäusewand durch einen Luftspalt getrennter Dämmeinsatz 12 vorgesehen.The three connecting pipes 3, 4, 5 have different diameters and, due to their likewise inclined edge 9a, also have different lengths. An outlet connection 11 leads from the chamber 1b to the internal combustion engine. The arrangement of the inlet pipe 6 with respect to the connecting pipes 3, 4, 5 or the latter with respect to the outlet connection 11 is provided such that the direction of flow of the sucked-in air reverses both in the first larger chamber 1a and in the second chamber 1b. In the second chamber 1b, an insulation insert 12 is provided which is separated from the housing wall by an air gap in order to reduce the sound transmission to the housing 1 and thus to radiate sound from the housing surface.

Claims (4)

Ansauggeräuschdämpfer mit Luftfilter (10), insbesondere für Zweitakt-Brennkraftmaschinen, bestehend aus einem steifen Gehäuse, das durch eine Trennwand (2) in zwei Kammern (1a, 1b) unterteilt ist, die durch wenigstens zwei die Trennwand (2) durchsetzende Rohre (3, 4, 5) verbunden sind, wobei die erste größere Kammer (1a) ein Eintrittsrohr (6) sowie einen Filtereinsatz (10) aufweist und die zweite Kammer (16) mit einem Austrittsstutzen versehen ist, dadurch gekennzeichnet, daß das Eintrittsrohr (6) aus einem in zwei oder mehrere Kanäle (8) unterschiedlicher Länge unterteilten Diffusor besteht und daß die die beiden Kammern (1a, 1b) verbindenden Verbindungsrohre (3, 4, 5) in an sich bekannter Weise unterschiedliche Durchmesser und/oder Längen aufweisen.Intake silencer with air filter (10), in particular for two-stroke internal combustion engines, consisting of a rigid housing which is divided by a partition (2) into two chambers (1a, 1b) which are separated by at least two pipes (3) passing through the partition (2) , 4, 5), the first larger chamber (1a) having an inlet pipe (6) and a filter insert (10) and the second chamber (16) being provided with an outlet connection, characterized in that the inlet pipe (6) consists of a diffuser divided into two or more channels (8) of different lengths and that the connecting pipes (3, 4, 5) connecting the two chambers (1a, 1b) have different diameters and / or lengths in a manner known per se. Ansauggeräuschdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das den Diffusor bildende Eintrittsrohr (6) gegenüber den Verbindungsrohren (3, 4, 5) bzw. diese gegenüber dem Austrittsstutzen (11) im Sinne einer Umkehr der Strömungsrichtung in der ersten (1a) und/oder zweiten Kammer (1b) angeordnet sind.Intake silencer according to claim 1, characterized in that the inlet pipe (6) forming the diffuser opposite the connecting pipes (3, 4, 5) or these opposite the outlet pipe (11) in the sense of a reversal of the flow direction in the first (1a) and / or second chamber (1b) are arranged. Ansauggeräuschdämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in der zweiten Kammer (1b) ein von der Gehäusewand durch einen Luftspalt getrennter Dämmeinsatz (12) vorgesehen ist.Intake silencer according to Claim 1 or 2, characterized in that an insulating insert (12) which is separated from the housing wall by an air gap is provided in the second chamber (1b). Ansauggeräuschdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das Austrittsende des Eintrittsrohres (6) und wenigstens eines der beiden Enden der Verbindungsrohre (3, 4, 5) jeweils einen zur Rohrachse schrägen Rand (9, 9a) aufweisen.Intake silencer according to claim 1, characterized in that the outlet end of the inlet pipe (6) and at least one of the two ends of the connecting pipes (3, 4, 5) each have an edge (9, 9a) which is oblique to the pipe axis.
EP91890079A 1990-04-30 1991-04-17 Intake silencer, in particular for two stroke internal combustion engines Expired - Lifetime EP0455622B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT984/90 1990-04-30
AT0098490A AT396510B (en) 1990-04-30 1990-04-30 SUCTION MUFFLER WITH AIR FILTER, ESPECIALLY FOR TWO-STROKE COMBUSTION ENGINES

Publications (2)

Publication Number Publication Date
EP0455622A1 true EP0455622A1 (en) 1991-11-06
EP0455622B1 EP0455622B1 (en) 1993-06-23

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EP91890079A Expired - Lifetime EP0455622B1 (en) 1990-04-30 1991-04-17 Intake silencer, in particular for two stroke internal combustion engines

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Country Link
US (1) US5164550A (en)
EP (1) EP0455622B1 (en)
JP (1) JPH04228868A (en)
AT (1) AT396510B (en)
DE (1) DE59100163D1 (en)
ES (1) ES2041556T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388408A (en) * 1993-10-01 1995-02-14 Lawrence-Keech Inc. Exhaust system for internal combustion engines
JP2895407B2 (en) * 1994-12-01 1999-05-24 本田技研工業株式会社 Intake silencer
US7441532B2 (en) 2006-02-15 2008-10-28 Briggs & Stratton Corporation Four-stroke internal combustion engine having reduced noise emissions
DE102006060271A1 (en) * 2006-12-20 2008-06-26 Volkswagen Ag Motor vehicle motor air filter housing, in two parts, has dividing walls defining chambers for air inflow/outflow and the filter with resonance chambers formed by reinforcement ribs
US7934582B2 (en) * 2007-09-07 2011-05-03 Go Green APU LLC Engine silencing and vibration reduction system and method
US8087492B2 (en) * 2010-03-08 2012-01-03 Huntair, Inc. Methods and systems for integrating sound attenuation into a filter bank
US8066096B1 (en) * 2010-11-04 2011-11-29 Hamilton Sundstrand Corporation Inlet silencer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT235089B (en) * 1962-05-16 1964-08-10 Knecht Filterwerke Gmbh Damper filter intended in particular for an internal combustion engine
FR2605271A1 (en) * 1986-10-17 1988-04-22 Gilardini Spa AIR SUCTION GROUP FOR INDUSTRIAL VEHICLES
US4790864A (en) * 1987-12-16 1988-12-13 Ford Motor Company Compact engine air/cleaner with integrated components

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782912A (en) * 1987-03-18 1988-11-08 Ford Motor Company Engine air cleaner - noise reducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT235089B (en) * 1962-05-16 1964-08-10 Knecht Filterwerke Gmbh Damper filter intended in particular for an internal combustion engine
FR2605271A1 (en) * 1986-10-17 1988-04-22 Gilardini Spa AIR SUCTION GROUP FOR INDUSTRIAL VEHICLES
US4790864A (en) * 1987-12-16 1988-12-13 Ford Motor Company Compact engine air/cleaner with integrated components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 244 (M-834) 07 Juni 1989,;& JP-A-1 053 055 (HONDA MOTOR CO LTD) 01 März 1989, *

Also Published As

Publication number Publication date
DE59100163D1 (en) 1993-07-29
US5164550A (en) 1992-11-17
ES2041556T3 (en) 1993-11-16
JPH04228868A (en) 1992-08-18
AT396510B (en) 1993-10-25
ATA98490A (en) 1993-01-15
EP0455622B1 (en) 1993-06-23

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