EP2017440B1 - Herstellungsverfahren eines Schalldämpfers und Vorrichtung zur Herstellung dieses Schalldämpfers - Google Patents

Herstellungsverfahren eines Schalldämpfers und Vorrichtung zur Herstellung dieses Schalldämpfers Download PDF

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Publication number
EP2017440B1
EP2017440B1 EP08159563A EP08159563A EP2017440B1 EP 2017440 B1 EP2017440 B1 EP 2017440B1 EP 08159563 A EP08159563 A EP 08159563A EP 08159563 A EP08159563 A EP 08159563A EP 2017440 B1 EP2017440 B1 EP 2017440B1
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EP
European Patent Office
Prior art keywords
conduit
parison
orifices
moulds
mould
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.)
Not-in-force
Application number
EP08159563A
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English (en)
French (fr)
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EP2017440A1 (de
Inventor
Umberto Cornaglia
Giorgio Rocca
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Officine Metallurgiche G Cornaglia SpA
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Officine Metallurgiche G Cornaglia SpA
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Publication of EP2017440A1 publication Critical patent/EP2017440A1/de
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Not-in-force legal-status Critical Current
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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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
    • 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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air
    • 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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • 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
    • F02M35/1238—Flow throttling or guiding by using secondary connections to the ambient, e.g. covered by a membrane or a porous member
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/165—Marine vessels; Ships; Boats
    • F02M35/167—Marine vessels; Ships; Boats having outboard engines; Jet-skis
    • F02M35/168—Marine vessels; Ships; Boats having outboard engines; Jet-skis with means, e.g. valves, to prevent water entry

Definitions

  • the present invention concerns a method and apparatus for manufacturing silencer device in a single piece with a fluid conduit.
  • the invention concerns a silencer device for intake conduits of air intake systems in internal combustion engines, in particular engines for vehicles and especially motor vehicles.
  • silencer devices In the field of internal combustion engines, for instance engines for vehicles and in particular motor vehicles, silencer devices have been developed aiming at reducing the noise level associated with exhaust gas discharge from and air intake into the engine.
  • Intake silencer generally operates by exploding the principle of destructive interference and, in its simplest form, it consists of an expansion chamber and two hoses with such shapes and sizes that air passes therethrough with minimum noise.
  • modem internal combustion engines especially diesel cycle engines
  • turbocharger In order to reduce the amount of harmful emissions and to increase the delivered power, modem internal combustion engines, especially diesel cycle engines, are generally equipped with a turbocharger and nowadays they are fed with air at higher and higher pressure.
  • Fig. 7 shows a scheme of a conventional intake system for supercharged internal combustion engines.
  • An engine MT is equipped with an exhaust manifold CR for discharging exhaust gases, and an intake manifold CA for air inlet into the combustion chambers.
  • Intake manifold CA receives air from intake system AS that preferably includes a heat exchanger SC, generally of the air-to-air type, known as "intercooler” device, a turbine TR or turbocharger, generally operated by the exhaust gases, and a filter FT, for instance equipped with a cartridge of corrugated paper, which removes particles with too big a size, which could damage the engine, from the inlet air flow.
  • Air arriving at filter FT is taken from the external environment through an intake conduit CS having an intake mouth BS.
  • the intake mouth is to be suitably positioned in order to prevent entrance of foreign bodies.
  • intake conduit CS will have different shapes and will often be winding, whereby application of conventional silencer devices will consequently be difficult.
  • FR 2 867 234 discloses an acoustic attenuation device, particularly for an intake duct of an internal combustion engine. This document discloses the manufacturing of the intake duct by forming apertures on such duct during a blow moulding process.
  • An advantage of the invention is the possibility of equipping any conduit with the silencer device, thereby obtaining an integral body having no connecting joint.
  • the device could be applied only on one or some conduit portions. More particularly, the orifices could be provided only in the conduit portions that are less subject to smearing, whereby the performance of the silencer device is preserved in time.
  • the reduction of the number of components further allows reducing the weight and results in a greater capability of recycling materials.
  • the method according to the invention can be implemented by using the conventional technologies for producing fluid conduits.
  • FIG. 1 the principle on which a silencer device manufactured by the method and apparatus according to the present invention is based is schematically shown.
  • said conduit 11 further has a set of orifices 19 along wall 13 defining conduit 11 itself, said orifices putting the inside of the conduit in communication with the outside.
  • the present invention is based on the discovery that such a physical principle can be advantageously applied to produce silencer devices for conduits along which a fluid, in particular a gaseous fluid, flows, in order to reduce the noise produced by the pressure variations the fluid is subjected to, in particular the variations due to the fluid inflow into the conduit and to the shape of the conduit itself.
  • the silencer device manufactured by the method and apparatus according to the present invention comprises a dissipating element, which has at least two and preferably at least four orifices and is formed or applied at least in correspondence of a portion of the wall defining the conduit, said orifices putting the inside of the conduit in communication with the outside.
  • Said device will preferably be formed directly integrated into the conduit wall, which therefore will have orifices in at least a portion thereof, but it can also be made by applying, for instance in correspondence of a window formed on the conduit wall, a body having orifices.
  • the silencer device thus obtained advantageously allows cutting down the noise propagating along the conduit.
  • Said device can be applied in particular in the conduits of the intake system of internal combustion engines, for instance engines used in vehicles.
  • a generic conduit 211 defined by a wall 213 and having an inlet mouth 215 and an outlet mouth 217, includes said silencer device 221 consisting of an element 223 with a plurality of orifices 219. which is directly formed on wall 213 of conduit 211.
  • silencer device 221 is formed in correspondence of one side of a curved portion of conduit 211, and it can be seen through the section made in the Figure on the opposite side.
  • monolithic conduits of a material homogeneous with the integrated silencer device can be produced, and the device can extend over the whole or part of the surface of the wall defining the conduit.
  • a generic conduit 311 defined by a wall 313 and having an inlet mouth 315 and an outlet mouth 317, includes a silencer device 321 consisting of an element 323 with a plurality of orifices 319, which is applied on wall 313 of conduit 311, for instance by soldering or gluing, in correspondence of a window 325 formed on the wall of said conduit.
  • silencer device 321 is applied in correspondence of one side of a curved portion of conduit 311, corresponding to the front side that can be seen in the Figure.
  • existing conduits can be equipped with the silencer device, which can be a separate body applied to the conduit wall or a hose inserted between two successive sections of the same conduit or of different conduits.
  • FIG. 4 there is shown a generic intake conduit 411 for a turbocharged diesel cycle internal combustion engine for a motor vehicle, which conduit has been equipped with a silencer device 421 manufactured by the method and apparatus according to the invention.
  • Conduit 411 is of the kind associated with the intake system in the initial portion conveying fresh air from the external environment towards the filter.
  • Said conduit 411 is defined by a wall 413 and has an inlet mouth 415 and an outlet mouth 417.
  • Conduit 411 has a winding shape and is equipped with at least one bellows 429 integrated into conduit wall 413.
  • wall 413 of conduit 411 has orifices 419, highlighted in the enlarged portion of Fig. 4 , which are distributed over a portion 423 of wall 413.
  • Said orifices are formed by piercing wall 413 and they have a diameter "d" of about 0.8 mm and a pitch "p" of about 4.0 mm.
  • conduit 411 can advantageously be made of plastics, preferably as an integral piece, and orifices 419 are formed in wall 413 either while conduit 411 is being formed.
  • the silencer device manufactured by the method and apparatus according to the invention is directly formed on the wall of a fluid conduit by piercing, in at least one conduit portion, at least two and preferably at least four circular micro-orifices with a diameter lower than 5.0 mm and preferably ranging from about 0.5 to 1.5 mm, and with a pitch of the order of some millimetres, e.g. ranging from 1 to 10 mm and preferably of about 4.0 mm.
  • the conduit is made of a thermoplastic material, e.g. thermoplastic polyester (TEEE) or rigid-soft polyamide (PA) or polypropylene (GF) and thermoplastic rubber (PPGF + PP/EPDM).
  • TEEE thermoplastic polyester
  • PA rigid-soft polyamide
  • GF polypropylene
  • PPGF + PP/EPDM thermoplastic rubber
  • such materials enable dispensing with the use of non-recyclable materials, such as rubber, while reducing at the same time the weights.
  • the manufacture of the conduit takes place by exploiting the blow-moulding technology, which, among its main advantages, enables manufacturing special products having a complex geometry and combining, in a single piece, characteristics of stiffness, resilience and capability of deformation with high dimensional precision and stability.
  • the parison is then clenched between the half-moulds and compressed air is blown into the clenched parison that expands until taking the shape of the mould cavity.
  • the blow-moulding process comprises therefore the steps of: placing the parison in the half-mould; closing the mould; blowing; removing the formed piece.
  • At least one of half-moulds 551 of a machine for blow-moulding plastics is equipped with a piercing assembly 553.
  • said piercing assembly 553 comprises a support 555 slidable in a seat 556 formed in the half-mould body, thanks to a control unit 557 for instance of pneumatic type.
  • a support 555 has associated therewith needles 559 that, when sliding, jointly with support 555, in corresponding seats 561 formed in the body of half-mould 551, penetrate during blowing into the body of parison 563, a portion of which can be seen, and enable forming corresponding orifices on the wall of the conduit obtained at the end of the blowing step.
  • piercing assembly 553 has nine needles 559 in order to pierce an equal number of holes into parison 563, which holes have axes substantially perpendicular to the wall of the conduit obtained by moulding the parison.
  • piercing assemblies with a different number of needles and/or multiple piercing assemblies in one or both half-moulds, and even with different penetration directions, can be envisaged.
  • the piercing assembly (assemblies) are pneumatically controlled while the parison blowing takes place.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Claims (12)

  1. Herstellungsverfahren eines Schalldämpfers, der einstückig mit einem Rohr ausgebildet ist, in dem ein Fluid strömen kann und das mit einer Vielzahl von Öffnungen versehen ist, über die die Innenseite des Rohrs mit der Außenseite in Verbindung steht, indem die Öffnungen im Rohr während eines Blasformverfahrens gebildet werden;
    das Verfahren ist dadurch gekennzeichnet, dass der Blasformprozess folgende Schritte umfasst:
    - Bereitstellung einer Blasformmaschine, die eine Form mit mindestens zwei Formhälften aufweist;
    - Bereitstellung eines aus Kunststoff zu blasenden Blasrohlings,
    - Platzierung des Blasrohlings in einer der Formhälften;
    - Einklemmen des Blasrohlings zwischen den Formhälften durch Schließen der Form;
    - Einblasen von Druckluft in den in der Form enthaltenen Blasrohling;
    - Bildung der Öffnungen auf dem Rohr durch:
    Bewegen eines Gleitschiebers (555) mittels einer Steuereinheit (557), der zu einer Locheinheit (553) gehört, die in mindestens einer der Formhälften vorgesehen ist, sowie
    Herstellen von mit dem Gleitschieber (555) verbundener Nadeln (559), um mit ihnen in entsprechenden, im Körper mindestens einer der Formhälften ausgebildeten Aufnahmen (561) zu gleiten und die Wandung des Blasrohlings (563) zu durchstoßen, um beim Blasvorgang die Öffnungen zu bilden; sowie
    - Entnehmen des geformten Rohrs aus der Form.
  2. Verfahren nach Anspruch 1, wobei die Öffnungen durch Bewegen einer Vielzahl von Locheinheiten (553) geformt werden.
  3. Verfahren nach Anspruch 2,
    wobei die Locheinheiten (553) in derselben Formhälfte vorgesehen sind.
  4. Verfahren nach Anspruch 2,
    wobei die Locheinheiten (553) in unterschiedlichen Formhälften vorgesehen sind.
  5. Verfahren nach einem der Ansprüche 2 bis 4, wobei die Locheinheit (553) in verschiedene Stoßrichtungen wirken.
  6. Verfahren nach einem der vorhergehenden Ansprüche, wobei der Gleitschieber (555) durch eine pneumatische Steuereinheit (557) bewegt wird.
  7. Vorrichtung zur Herstellung eines Schalldämpfers, der einstückig mit einem Rohr ausgebildet ist, in dem ein Fluid strömen kann und das Rohr mit einer Vielzahl von Öffnungen versehen ist, über die die Innenseite des Rohrs mit der Außenseite in Verbindung steht;
    dadurch gekennzeichnet, dass die Vorrichtung Folgendes umfasst:
    - eine Blasformmaschine mit einer Form, die mindestens zwei Formhälften aufweist, zwischen denen ein Blasrohling einklemmbar ist; der aus Kunststoff besteht und der in der Form mittels Druckluft geblasen werden kann, wobei eine der Formhälften zur Aufnahme des Blasrohlings vorgesehen ist;
    - mindestens eine Locheinheit (553), die mindestens in einer der Formhälften angeordnet ist und einen Gleitschieber (555) mit integrierten Nadeln (559) aufweist; und
    - eine Steuereinheit (557), die zum gemeinsamen Verschieben des Gleitschiebers (555) mit den Nadeln (559) in entsprechende, im Körper mindestens einer der Formhälften ausgebildete Aufnahmen (561) angeordnet ist, damit die Nadeln (559) die Wandung des Blasrohlings durchdringen, um die Öffnungen beim Blasen des Blasrohlings zubilden.
  8. Vorrichtung nach Anspruch 7, dass sie eine Vielzahl von Locheinheiten (553) aufweist.
  9. Vorrichtung nach Anspruch 8, dass die Locheinheiten (553) in derselben Formhälfte vorgesehen sind.
  10. Vorrichtung nach Anspruch 8, dass die Locheinheiten (553) in unterschiedlichen Formhälften vorgesehen sind.
  11. Vorrichtung nach einem der Ansprüche 8 bis 10, dass die Locheinheiten (553) so angeordnet sind, dass sie in verschiedene Stoßrichtungen wirken.
  12. Vorrichtung nach einem der Ansprüche 7 bis 11, dass die Steuereinheit (557) pneumatischer Art ist.
EP08159563A 2007-07-17 2008-07-02 Herstellungsverfahren eines Schalldämpfers und Vorrichtung zur Herstellung dieses Schalldämpfers Not-in-force EP2017440B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000529A ITTO20070529A1 (it) 2007-07-17 2007-07-17 Dispositivo silenziatore per un condotto atto ad essere percorso da un fluido e suo metodo di realizzazione.

Publications (2)

Publication Number Publication Date
EP2017440A1 EP2017440A1 (de) 2009-01-21
EP2017440B1 true EP2017440B1 (de) 2010-02-24

Family

ID=39926451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08159563A Not-in-force EP2017440B1 (de) 2007-07-17 2008-07-02 Herstellungsverfahren eines Schalldämpfers und Vorrichtung zur Herstellung dieses Schalldämpfers

Country Status (5)

Country Link
EP (1) EP2017440B1 (de)
AT (1) ATE458901T1 (de)
DE (1) DE602008000694D1 (de)
ES (1) ES2342133T3 (de)
IT (1) ITTO20070529A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10047650B2 (en) 2014-03-31 2018-08-14 Faurencia Emissions Technologies USA, LLC Vehicle exhaust system with resistive patch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1400167B1 (it) * 2010-05-21 2013-05-17 Fiat Group Automobiles Spa Condotto silenziato per fluidi aeriformi e metodo per il suo ottenimento.
DE102012014620A1 (de) 2012-07-24 2014-01-30 Faurecia Emissions Control Technologies, Germany Gmbh Abgasführendes Bauteil einer Abgasanlage
WO2014126548A1 (en) 2013-02-12 2014-08-21 Faurecia Emissions Control Technologies Vehicle exhaust system with resonance damping
GB2546792A (en) * 2016-01-29 2017-08-02 Dyson Technology Ltd A silencer
CN113847118B (zh) * 2021-09-10 2022-10-18 浙江吉利控股集团有限公司 一种排气消音器总成主动发声的系统及方法

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
DE19629368A1 (de) * 1996-07-20 1998-01-22 Gillet Heinrich Gmbh Vorrichtung zum Unterdrücken des Entstehens von harmonischen Tönen in perforierten Rohren
JPH11280479A (ja) * 1998-03-27 1999-10-12 Calsonic Corp インタークーラ
DE19903165A1 (de) * 1999-01-27 2000-08-03 Mann & Hummel Filter Ansaugvorrichtung mit einem Durchbrüche aufweisenden Leitungsabschnitt
GB2364352A (en) * 2000-07-03 2002-01-23 Draftex Ind Ltd Noise reduction in air conduits; making perforated conduits
FR2814778B1 (fr) * 2000-09-29 2003-01-10 Peugeot Citroen Automobiles Sa Conduit pour le transport de fluide gazeux et dispositif d'admission d'air pour moteur a combustion interne comportant un tel conduit
SE522546C2 (sv) * 2001-02-21 2004-02-17 Volvo Lastvagnar Ab Anordning för dämpning av resonans i en rörledning
FR2867234B1 (fr) * 2004-03-02 2007-11-16 Peugeot Citroen Automobiles Sa Dispositif d'attenuation acoustique d'un conduit de circulation de gaz d'un moteur thermique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10047650B2 (en) 2014-03-31 2018-08-14 Faurencia Emissions Technologies USA, LLC Vehicle exhaust system with resistive patch

Also Published As

Publication number Publication date
ES2342133T3 (es) 2010-07-01
ATE458901T1 (de) 2010-03-15
ITTO20070529A1 (it) 2009-01-18
EP2017440A1 (de) 2009-01-21
DE602008000694D1 (de) 2010-04-08

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