EP0834011B2 - Ansaugschalldämpfer und kraftfahrzeug - Google Patents
Ansaugschalldämpfer und kraftfahrzeug Download PDFInfo
- Publication number
- EP0834011B2 EP0834011B2 EP97920737A EP97920737A EP0834011B2 EP 0834011 B2 EP0834011 B2 EP 0834011B2 EP 97920737 A EP97920737 A EP 97920737A EP 97920737 A EP97920737 A EP 97920737A EP 0834011 B2 EP0834011 B2 EP 0834011B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- intake
- intake pipe
- resonator
- openings
- pipe
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 230000003584 silencer Effects 0.000 title claims description 48
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000006098 acoustic absorber Substances 0.000 claims 1
- 239000003570 air Substances 0.000 description 17
- 238000013016 damping Methods 0.000 description 14
- 230000007423 decrease Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
-
- 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
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
Definitions
- the invention relates to an intake silencer for an internal combustion engine in the preamble of claim 1 mentioned type and a motor vehicle with internal combustion engine and supercharger with one Intake silencer.
- FIG. 1 of this document is a located immediately behind the intake air filter Muffler combination shown in which the intake manifold immediately behind the dust filter cartridge Provide wall openings and with an insulation material is surrounded.
- the intake pipe In the direction of flow behind this Section is the intake pipe with an axial sequence provide rows of holes arranged in a ring. each this row of holes is the one with the intake pipe outside surrounding chamber in connection.
- the pods are each one of the Sound waves from the intake air passing through rows of holes redirected so that the air flow in the intake pipe running in the opposite direction into the surrounding Chamber directed and on its radially aligned Ground to be steered.
- This chamber floor acts as a reflector. This sets them to the entry hole row returning reflected sound waves Acoustic conductance of those formed in the intake pipe Openings effectively so far down that an effectively coupled Intake noise reduction also at clearly frequencies placed in the lower frequency range is achieved.
- German patent DE 743 418 A known prior art thus teaches intake noise damping through resonance coupling to a reflection damper.
- dampers of this kind only suitable for low frequencies, for example for Damping of 2nd order motor pulsations, each have Chamber only a single defined resonance frequency on, that is, no matter how narrowly usable Frequency band, and also require a large one Construction space, both because of the structure of each individual reflector chamber as well because of the large number of the reflector chambers that are used to achieve at least one moderate broadness of the intake silencer required are.
- German patent DE 580 923 A is also used as an intake silencer or bullet silencer Designated exhaust damper for Internal combustion engines known as the single-tube resonance damper is trained.
- the the resonance wavelength Bores defining in the exhaust pipe are due the excess pressure in the exhaust pipe with an outer jacket surround. This coat affects that Damping behavior of the exhaust silencer impairing out.
- Another intake silencer is from the Publication US 4,350,223 A is known.
- This intake silencer is in a flexible, from a corrugated tube existing line used, the one the Ambient air intake opening in the body of the motor vehicle with the intake manifold of the air filter combines.
- This intake silencer dampens the Air noise within the intake area of a narrow frequency band that applies to both Extends sides of the resonance frequency of the resonator.
- a resonator constructed in the same way sees the technical teaching of the German patent application DE 32 34 634 A1, which is directly in the Intake of the filter is integrated.
- Two rows of openings connect the as the intake pipe of the intake silencer serving intake of the filter with the interior of the surrounding resonator. These two rows of openings are arranged so that, based on the specific natural resonance frequency of the intake manifold a ⁇ / 2 and ⁇ / 4 damping cause. This will make the effectiveness of the Dampers improved, but not its frequency range.
- An intake silencer "stuffed” with insulating material comparable design integrated into the Intake manifold of a charge air cooler is from the German Patent specification DE 35 31 353 C2 for an internal combustion engine known with charger.
- the intake silencer of the example above shown prior art show overall the disadvantage, only within a comparative dampen narrow frequency band usable.
- dampers are stuffed with insulation material only suitable for systems with only moderate overpressure exhibit.
- For use in a charger intake line are silencers damped with insulation unusable.
- turbochargers are currently used for this purpose are working to this end with rotor speeds to nearly 200 000 min -1. It is understandable that turbochargers with such a high profile of requirements can only remain practically economical with compromises on manufacturing tolerances. This is the reason for the strong acoustic radiation of such turbochargers, namely the typical "turbocharger whistle" in the frequency range of around 2 - 4 kHz. The charging process, even in the intake line, once again produces clearly radiating broadband noises in the frequency band of 4 - 6 kHz, which are referred to as "hissing".
- the object of the invention is accordingly the basis, one that can also be used for other purposes Broadband airborne sound absorbers, but especially an intake silencer for an internal combustion engine to create the smallest possible and flexible adaptable construction volume with flexible adjustment to the specific application requirements for airborne noise evenly over a wide frequency band can effectively dampen.
- Intake silencers will be able to be used in automotive internal combustion engines generated by turbocharger and loudly emitted noise in the To dampen the frequency band of around 2 - 6 kHz so that them both outside and inside the vehicle are practically imperceptible themselves.
- an intake silencer has of the type mentioned in the claim 1 mentioned features.
- the intake silencer according to the invention is accordingly constructed so that the intake air flows through the damper, in one Intake pipe that runs the entire axial length on the the damping is effected by a single, preferably double-shell resonator housing is surrounded.
- the intake pipe in a manner known per se Provide openings that the wall of the intake pipe push through open on both sides and the interior of the Intake pipe with the interior of the in the resonator housing trained resonator chambers connects.
- the wall thickness of the intake pipe is preferably in the range of 0.6 to 5 mm, especially in the Range between 1 to 3 mm inclusive.
- the wall thickness of the intake pipe or the inner wall height the opening in the wall of the intake pipe a matter of coordination between the cross-sectional area the opening, the volume of the connected Resonator chamber and the latitude and frequency range of the resonance absorption band to be set.
- the width of the active resonance absorption frequency band that can be set in this way increases with it decreasing cross-sectional area of the opening.
- the efficiency of the coupling ie the degree of damping that can be achieved must decrease the cross-sectional area of the opening initially between these two limit parameters can be optimized.
- the one punched through the resonator housing Intake pipe around the annulus is through aligned transversely to the axial course of the intake pipe Chamber walls in a sequence in the axial direction successive resonator chambers with each volume divided from each other.
- This Chamber walls are expediently on the resonator housing molded themselves and enclose as Inlet part formed intake pipe.
- the intake pipe is also firmly attached to the this enclosing chamber walls formed and in this form as an insert in the resonator housing be introduced. The only important thing is that the in thus formed resonator chambers hermetically are delimited from each other.
- the damping resonance band assigned to this primarily by dimensioning the chamber volume and by the wall thickness of the intake pipe wall in the area assigned to the respective chamber Match openings.
- the effective Frequency band becomes wider the smaller the Opening area will.
- the amount of damping also decreases, so that a compromise between the required Damping effect and the achievable broadband the damping of each chamber must be adjusted.
- the neighboring chamber so coordinated that the upper one, for example Frequency of the absorption band a chamber and the lower frequency of the absorption band of the neighboring chamber overlap sufficiently wide.
- the upper one for example Frequency of the absorption band a chamber and the lower frequency of the absorption band of the neighboring chamber overlap sufficiently wide.
- successive chambers so that whose volumes decrease steadily from one cell to the next or increases. This is supposed to mean that in a certain direction the resonator chamber volume the one immediately following in axial order Chambers is increasing steadily, from the first to the last chamber, and in reverse Accordingly, the direction decreases steadily.
- chamber to chamber is independent of the Direction in which the intake air the intake silencer flows through. In both cases, one becomes largely achieved the same acoustic damping.
- Intake silencers make that practical a damping frequency band without gaps in the range from 1 - 10 kHz.
- the intake pipe and the resonator of the intake silencer the invention can in principle can be made from any material.
- the suction line and Resonator housing also from the same material be made because the resonator housing shell practical has no radiation. Also don't need any additional damping materials to be used, to emit the noise from the resonator housing to prevent.
- the intake silencer the invention of heat-resistant, preferably fiber-reinforced plastic, hard rubber or made of porous sintered materials or porous materials, mainly made of aluminum.
- each individual resonator chamber For coupling the in each individual resonator chamber available air volume at the Sound pressure in the intake line and for which in the damping adjusting each resonator chamber Natural frequency and the width of their effective frequency band are, as shown, only the cross-sectional area of each opening, the number of Openings per chamber and the wall thickness of the intake pipe determinative.
- the geometric shape of each However, opening is basically without, at least without any noticeable influence on the characteristics of the intake silencer the invention. So they can individual resonator chambers with the inside of the intake pipe connecting openings both round, i.e. strictly speaking, be cylindrical, as well as oval, egg-shaped, be slit-shaped and polygonal. However, all openings of the intake pipe are preferably formed with a circular cross section. Such an embodiment of the intake silencer facilitates its tunability.
- the intake silencer When used in motor vehicles with superchargers the effect is practically flow-free working intake silencer preferably between the charger and the intercooler immediately switched on in the suction line.
- the intake silencer the invention in principle connect as close as possible to the loader's discharge nozzle, in particular to flange directly onto this or the shortest possible acoustically isolating Connect to this, or but, preferably, directly in the pressure port to integrate the turbocharger, for example in the from German patent DE 35 31 353 C2 for known the intake manifold of an intercooler Way.
- the intake silencer 1 shown in FIG. 1 for an internal combustion engine consists of an intake air in the throughflow leading intake pipe 2 and one this with the formation of a closed annulus 2 enclosing double-shell Resonator housing 4, wherein in Fig. 1 the better For the sake of clarity, only one of the two Housing shells that can be assembled to fit exactly are shown is.
- the intake silencer 1 is with an inlet port 5 and an outlet 6 to turn on equipped in the intake line of the internal combustion engine. It is for the purpose of better description the present invention, the inlet port 5 as shown in one piece with the intake pipe, while the outlet nozzle 6 as one piece with the illustrated Resonator housing shell shown connected is. This type of design of the connecting piece is basically interchangeable.
- both connecting pieces i.e. both Inlet connection as well as the outlet connection
- in one piece formed with the resonator housing in preferably the way that one of the two connecting pieces on one of the two resonator housing shells, the other on the other housing shell molded or otherwise formed with this are.
- This causes that in a two-shell design of the intake pipe as an insert in the resonator housing a preliminarily closing and Closing pressure for sealing purposes when closing of the resonator housing by welding, screwing or can be exercised otherwise.
- Each of these openings is circular in cross section trained, and has a wall thickness of Intake pipe 2 in the opening area of 2 mm Diameter of 3 mm.
- the openings 7 are arranged in the intake pipe 2 so that each of the resonator chambers 9 with the Inside the intake pipe 2 is connected, namely with the formation of a small oscillating air mass in the opening in such a way that none of the camera walls bridged, i.e. with one of the neighboring ones Chambers is short-circuited.
- Fig. 1 In the manner shown in Fig. 1 is the intake pipe within the resonator housing 4 with a oval cross-section, one of Inlet nozzle 5 through to outlet nozzle 6 continuously channel-like area of the intake pipe 2 none Has holes 7.
- This serves the purpose of using the intake air carried moisture, for example air humidity or oil dust when condensing in the intake pipe 2 not into the resonator chambers 9 through the To drain openings 7 through, but this Condensate without escaping into the resonator housing from the outlet port 6 of the intake silencer 1 let it run out (it should be noted that at the representation shown in Fig. 1, the spatial position the silencer 1 does not correspond to its installation position. This is after a rotation of that shown in Fig. 1 Intake silencer 1 by 90 ° clockwise obtained around the longitudinal axis of the intake pipe 2).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Compressor (AREA)
Description
- Figur 1
- ein Ausführungsbeispiel der Erfindung in perspektivischer Darstellung und bei abgenommenem Deckel des Resonatorgehäuses.
Claims (10)
- Ansaugschalldämpfer (1) für eine Brennkraftmaschine, bestehend aus einem die Ansaugluft führenden Ansaugrohr (2) und einem dieses unter Bildung eines geschlossenen Ringraums (3) umschließenden Resonatorgehäuse (4), mit einem Einlaßstutzen (5) und einem Auslaßstutzen (6), mit Öffnungen(7) in der Rohrwand des Ansaugrohres (2), die den Innenraum des Ansaugrohres (2) mit dem Innenraum des Resonatorgehäuses (4) verbinden, mit einer oder einer axialen Folge von mehreren quer zur Längsachse des Ansaugrohres (2) ausgerichteten und dieses umschließenden Kammerwänden (8) im Resonatorgehäuse (4) zum Bilden hermetisch gegeneinander abgegrenzter Resonatorkammern (9) unterschiedlichen Volumens, und mit einer solchen Anordnung der Öffnungen (7) in der Rohrwand des Ansaugrohrs (2), daß jede der Resonatorkammern (9) mit dem Inneren des Ansaugrohres (2) kommuniziert und dabei keine der Kammerwände (8) überbrückt wird,
dadurch gekennzeichnet, daß
die Öffnungen (7) im Ansaugrohr (2) so angeordnet sind, daß, unter Bildung kleiner schwingfähiger und durch Wandreibung gedämpfter Luftmassen in den Öffnungen (7), der im Ansaugrohr (2) auftretende Schalldruck auf jede Resonatorkammer (9) separat einwirken kann, ohne daß eine Kammer (9) zur Nachbarkammer (9) überbrückt wird,
für jede Resonatorkammer (9) über die der Wandhöhe der jeweiligen Öffnungen (7) entsprechende Wandstärke des Ansaugrohres (2) im Bereich der jeweiligen Öffnungen (7) in Abhängigkeit von der Querschnittsfläche der jeweiligen Öffnungen (7) und dem Volumen der an die jeweiligen Öffnungen (7) angeschlossenen Resonatorkammer (9) die Lage und Breite eines Resonanzabsorptionsbandes der angeschlossenen Resonatorkammer (9) abstimmbar sind, wobei die Wandstärke des Ansaugrohrs (2) im Bereich von 0,6 bis 5 mm liegt, und
sich die Resonanzabsorptionsbänder benachbarter Resonatorkammern (9) zum Bereitstellen eines lückenlosen Breitband-Luftschallabsorbers mit einem Dämpfungsfrequenzband im Bereich von 1 bis 10 kHz ausreichend breit überlappen. - Ansaugschalldämpfer nach Anspruch 1,
gekennzeichnet durch
eine kreiszylindrische Form der Öffnungen (7) in der Rohrwand des Ansaugrohres (2). - Ansaugschalldämpfer nach einem der Ansprüche 1 oder 2,
gekennzeichnet durch
eine solche Anordnung der Öffnungen (7) in der Rohrwand des Ansaugrohres (2), daß jede der Resonatorkammern (9) über eine gleiche Anzahl von Öffnungen mit dem Innenraum des Ansaugrohres (2) kommuniziert. - Ansaugschalldämpfer nach einem der Ansprüche 1 bis 3,
gekennzeichnet durch
einen ovalen oder abgeflacht ovalen Querschnitt des Ansaugrohres (2). - Ansaugschalldämpfer nach einem der Ansprüche 1 bis 4, gekennzeichnet durch
einen vom Einlaßstutzen (5) bis zum Auslaßstutzen (6) durchgehend ohne Öffnungen ausgebildeten Wandsektor im Sohlenbereich des Ansaugrohres (2), bezogen auf die bestimmungsgemäße Einbaulage des Ansaugrohres (2) im Ansaugschalldämpfer (1) und des Ansaugschalldämpfers (1) an der Brennkraftmaschine. - Ansaugschalldämpfer nach einem der Ansprüche 1 bis 5,
gekennzeichnet durch
eine zweischalige Ausbildung des Ansaugrohres (2) mit axialer Trennebene sowie auch durch eine zweischalige Ausbildung des Resonatorgehäuses (4) mit axialer Trennebene. - Ansaugschalldämpfer nach einem der Ansprüche 1 bis 6,
gekennzeichnet durch
die Ausbildung des Ansaugrohres (2) als Einlegteil im Resonatorgehäuse (4). - Ansaugschalldämpfer nach einem der Ansprüche 1 bis 7,
gekennzeichnet durch
am Resonatorgehäuse angeformte Einlaßstutzen und Auslaßstutzen (6). - Kraftfahrzeug mit einer Brennkraftmaschine, einem Auflader, einem Ladeluftkühler und einem Ansaugschalldämpfer nach einem der Ansprüche 1 bis 8,
gekennzeichnet durch
einen Anschluß des Ansaugschalldämpfers (1) zwischen dem Lader und dem Ladeluftkühler. - Kraftfahrzeug nach Anspruch 9,
gekennzeichnet durch
den Anschluß des Ansaugschalldämpfers (1) unmittelbar hinter oder an dem oder integriert mit dem Druckstutzen des Laders.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19615917A DE19615917A1 (de) | 1996-04-22 | 1996-04-22 | Ansaugschalldämpfer und Kraftfahrzeug |
DE19615917 | 1996-04-22 | ||
PCT/EP1997/002038 WO1997040271A1 (de) | 1996-04-22 | 1997-04-22 | Ansaugschalldämpfer und kraftfahrzeug |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0834011A1 EP0834011A1 (de) | 1998-04-08 |
EP0834011B1 EP0834011B1 (de) | 2000-05-31 |
EP0834011B2 true EP0834011B2 (de) | 2004-10-27 |
Family
ID=7792036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97920737A Expired - Lifetime EP0834011B2 (de) | 1996-04-22 | 1997-04-22 | Ansaugschalldämpfer und kraftfahrzeug |
Country Status (5)
Country | Link |
---|---|
US (1) | US5979598A (de) |
EP (1) | EP0834011B2 (de) |
DE (2) | DE19615917A1 (de) |
ES (1) | ES2146465T5 (de) |
WO (1) | WO1997040271A1 (de) |
Cited By (3)
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DE102013220686A1 (de) | 2013-10-14 | 2015-04-16 | Mahle International Gmbh | Ansaugschalldämpfer |
DE202014007986U1 (de) * | 2014-10-01 | 2016-01-05 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Schalldämpfer |
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-
1997
- 1997-04-22 US US08/983,024 patent/US5979598A/en not_active Expired - Lifetime
- 1997-04-22 ES ES97920737T patent/ES2146465T5/es not_active Expired - Lifetime
- 1997-04-22 WO PCT/EP1997/002038 patent/WO1997040271A1/de active IP Right Grant
- 1997-04-22 DE DE59701802T patent/DE59701802D1/de not_active Expired - Lifetime
- 1997-04-22 EP EP97920737A patent/EP0834011B2/de not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2161424A1 (de) | 2008-09-04 | 2010-03-10 | WOCO Industrietechnik GmbH | Fluidführungseinrichtung und Schalldämpfer sowie Abgasanlage mit solch einer Fluidführungseinrichtung |
DE102013220686A1 (de) | 2013-10-14 | 2015-04-16 | Mahle International Gmbh | Ansaugschalldämpfer |
DE202014007986U1 (de) * | 2014-10-01 | 2016-01-05 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Schalldämpfer |
Also Published As
Publication number | Publication date |
---|---|
DE19615917A1 (de) | 1997-10-30 |
US5979598A (en) | 1999-11-09 |
DE59701802D1 (de) | 2000-07-06 |
ES2146465T5 (es) | 2005-04-16 |
EP0834011B1 (de) | 2000-05-31 |
ES2146465T3 (es) | 2000-08-01 |
WO1997040271A1 (de) | 1997-10-30 |
EP0834011A1 (de) | 1998-04-08 |
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