EP0242797B1 - Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne - Google Patents

Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne Download PDF

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Publication number
EP0242797B1
EP0242797B1 EP87105625A EP87105625A EP0242797B1 EP 0242797 B1 EP0242797 B1 EP 0242797B1 EP 87105625 A EP87105625 A EP 87105625A EP 87105625 A EP87105625 A EP 87105625A EP 0242797 B1 EP0242797 B1 EP 0242797B1
Authority
EP
European Patent Office
Prior art keywords
intake
shut
intake silencer
flow cross
diffusor
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
Application number
EP87105625A
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German (de)
English (en)
Other versions
EP0242797A1 (fr
Inventor
Quang-Hue Vo
Peter-Josef Esser
Georg Gaede
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0242797A1 publication Critical patent/EP0242797A1/fr
Application granted granted Critical
Publication of EP0242797B1 publication Critical patent/EP0242797B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
    • 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

Definitions

  • the invention relates to an intake silencer, especially for internal combustion engines of the type specified in the preamble of the independent claim.
  • Such an intake silencer is known for example from FR-A-2,385,906 or the corresponding DE 2714100 C2.
  • the air supply comprises two diffusers of different dimensions. It is characteristic here that the two diffusers are connected to one another over their entire length by a gap which is dimensioned for sound absorption by interference.
  • a gap has a disadvantageous effect on the diffuser, which, with a small flow cross section and a relatively large length, serves as an oscillating tube for influencing the torque curve in the lower speed range of the internal combustion engine.
  • the wall parts delimiting the gap between the diffusers arranged diverging from the intake silencer act as sound sources.
  • the invention has for its object to design an intake silencer of the type described in such a way that the measures taken for effective damping of the intake silencer also bring about a torque-increasing effect on the internal combustion engine.
  • the core of the invention is the separate arrangement of the diffusers for mutual acoustic decoupling in combination with associated, alternately controllable shut-off elements. This gives the advantage of designing one of the two diffusers for an optimal torque curve in the lower and middle speed range of the machine and the other diffuser for a favorable power curve, with the two shut-off devices of the respective diffusers achieving correspondingly low natural resonances of the intake silencer.
  • the natural frequency of the intake silencer when air is supplied through the diffuser which acts as an undisturbed oscillating tube with a relatively small flow cross-section, can be reduced to such an extent that effective acoustic damping is advantageously achieved in a frequently used, fuel-efficient speed range of the internal combustion engine, and thus a pronounced one in a vehicle Acoustic annoyance due to the intake noise stops.
  • At least one shut-off device is equipped with a servomotor according to claim 2, which can be controlled via a preferably electronic control device.
  • a servomotor according to claim 2, which can be controlled via a preferably electronic control device.
  • an actuator it is conceivable to mechanically bring both flaps into drive connection with one another.
  • each of the flaps can be equipped with an actuator.
  • An air quantity or air mass signal, a signal derived from the intake manifold vacuum or the intake manifold vacuum directly as well as a signal of the speed of the internal combustion engine can serve as manipulated variables.
  • shut-off devices for controlling air collectors are known, the separately arranged air collectors being connected to combustion chambers of the internal combustion engine via combustion chambers of different dimensions. In contrast to the alternate control according to the invention, however, these shut-off devices are opened and closed one after the other.
  • a schematically and partially sectioned intake silencer 1 comprises a housing 2 which delimits a damping chamber 3.
  • An air filter insert 4 is arranged in the damping chamber 3. Downstream of the air filter insert 4, the intake silencer 1 is in an air-conducting connection via an opening 5 in the housing 2 to the remaining intake system, not shown, of an internal combustion engine.
  • a flow cross section of the diffusers 6 and 7 is understood to mean an average intake cross section AM.
  • the mean flow cross sections A m6 and A M7 are determined from the inflow-side cross sections A 61 and A71 and from the chamber-side cross sections A 62 and A 72 according to the formula
  • the sizes of the different flow cross sections A M6 and A M7 are selected so that the natural resonance frequency f 06 of the diffuser 6 is in a low speed range of the internal combustion engine.
  • the intake noise damper 1 thus achieves damping of the intake noise in a speed range frequently used because of the relatively high torque curve during operation of the internal combustion engine or the vehicle. With the simultaneous or parallel use of both diffusers 6 and 7 over the entire operating range of the internal combustion engine, an earlier damping of the intake noise is achieved compared to an intake damper with only one diffuser.
  • the damping of the intake noise can be shifted to low engine speeds by equipping each diffuser 8, 9 of an intake silencer 10 with a shut-off device 11 or 12, the shut-off devices 11 and 12 being controlled as a function of load and speed.
  • Each of the shut-off devices 11, 12 is equipped with a servomotor 13, 14 which is symbolized by dashed lines and which can be controlled via a preferably electronic control device 15.
  • controllable flaps 11 and 12 it is possible to supply the intake air for the internal combustion engine via one or the other of the diffusers 8 and 9 of different sizes to the internal combustion engine.
  • the flap 11 of the diffuser 8 When the internal combustion engine is operating in the lower speed range, the flap 11 of the diffuser 8 is open, which has a smaller flow cross section relative to the diffuser 9.
  • the geometrical dimensions of the diffuser 8 are coordinated for this speed range in such a way that a favorable torque curve is achieved in this speed range at full load.
  • the flap 12 of the diffuser 9 having a larger flow cross section is opened, while the flap 11 of the diffuser is closed and this diffuser is thus switched off.
  • each of the diffusers 8, 9 can be optimally designed according to its area of use in terms of its geometric dimensions with regard to the torque or with respect to the power. Due to the different geometrical dimensions arising further two different Eigenresonanzfre- Uenzen q f o8 and f oa, where f oa is very small. In this way, a high damping effect is achieved in the intake silencer 10 even at low speeds, and the level of the intake noise is thus kept low.
  • 16 denotes part of an intake system of the internal combustion engine, not shown.
  • a device 17 of a mixture formation system is operatively connected to the part of the intake system 16.
  • the device 17 is an air flow meter, which supplies a signal to the electronic control device 15 via a line 18.
  • This air volume signal on line 18 is processed with a speed signal of the internal combustion engine on line 19 in control device 15 to produce an output signal to an amplifier 20 for controlling one or the other servomotor 13, 14.
  • the device 17 can be a sensor which emits a signal corresponding to the respective intake manifold vacuum to the control device 15 via the line 18, the further signal processing taking place analogously to the control described above.
  • Fig. 3 shows an intake silencer 10 with pneumatic servomotors 21 and 22 for the shut-off devices 11 and 12.
  • the servomotors 21 and 22 are actuated via the intake manifold vacuum downstream of the device 17 designed as a carburetor in part 16 of the intake system of the internal combustion engine, not shown.
  • a controllable valve 26 is arranged between a suction-side vacuum line 23 and control lines 24 and 25 to the servomotors 21 and 22.
  • the valve 26 is controlled by an electronic control device 27, which is supplied with signals about the throttle valve position and the speed of the internal combustion engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Characterised By The Charging Evacuation (AREA)

Claims (2)

1. Silencieux d'aspiration, notamment pour moteurs à combustion interne, avec un carter (2) délimitant une chambre d'amortissement (3) et deux diffuseurs (8, 9) allant en s'élargissant vers la chambre d'amortissement (3) et amenant à la chambre d'amortissement (3) l'air aspiré à partir du libre environnement, un de ces diffuseurs comportant une section transversale moyenne d'écoulement importante par rapport à celle de l'autre diffuseur, les deux diffuseurs étant disposés à une certaine distance l'un de l'autre et débouchant dans la chambre d'amortissement (3) à une certaine distance l'un de l'autre, silencieux d'aspiration caractérisé en ce que les diffuseurs (8, 9) sont découplés acoustiquement l'un de l'autre et ont à peu près les mêmes longueurs, tandis que dans chaque diffuseur (8, 9) est disposé un organe de fermeture (11, 12) et ces organes de fermeture (11, 12) étant susceptibles d'être commandés alternativement en fonction de la charge et de la vitesse de rotation, de sorte que dans la gamme inférieure des vitesses de rotation, le clapet (11) dans le diffuseur (8) s'ouvre avec une section transversale moyenne d'écoulement réduite, et se ferme dans la gamme supérieure des vitesses de rotation, tandis que le clapet (12) dans le diffuseur (9) s'ouvre avec une section transversale moyenne d'écoulement importante dans la gamme supérieure des vitesses de rotation.
2. Silencieux d'aspiration selon la revendication 1, caractérisé en ce qu'au moins un organe de fermeture (11, 12) est en liaison d'entraînement avec un moteur de réglage (13, 14; 21,22), qui est susceptible d'être commandé par l'intermédiaire d'un dispositif de commande (15; 26, 27) électronique et/ou pneumatique.
EP87105625A 1986-04-24 1987-04-15 Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne Expired - Lifetime EP0242797B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863613828 DE3613828A1 (de) 1986-04-24 1986-04-24 Ansauggeraeuschdaempfer, insbesondere fuer brennkraftmaschinen
DE3613828 1986-04-24

Publications (2)

Publication Number Publication Date
EP0242797A1 EP0242797A1 (fr) 1987-10-28
EP0242797B1 true EP0242797B1 (fr) 1990-12-19

Family

ID=6299402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105625A Expired - Lifetime EP0242797B1 (fr) 1986-04-24 1987-04-15 Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0242797B1 (fr)
DE (2) DE3613828A1 (fr)
ES (1) ES2019320B3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615917A1 (de) * 1996-04-22 1997-10-30 Wolf Woco & Co Franz J Ansaugschalldämpfer und Kraftfahrzeug
EP1186768A2 (fr) 2000-09-05 2002-03-13 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Filtre à air pour un moteur à combustion interne à plusieurs cylindres
US6705272B2 (en) 1999-10-26 2004-03-16 Filterwerk Mann & Hummel Gmbh Air intake system with an air filter
DE102007026416B4 (de) * 2007-06-06 2014-09-04 Audi Ag Vorrichtung zur Beeinflussung des Ansauggeräusches einer Brennkraftmaschine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801153A1 (de) * 1987-01-24 1988-08-04 Mann & Hummel Filter Vorrichtung zur daempfung der ansauggeraeusche von brennkraftmaschinen
DE19811051B4 (de) 1998-03-13 2014-01-02 Mann + Hummel Gmbh Luftansaugeinrichtung für einen Verbrennungsmotor
DE19926135A1 (de) * 1999-06-09 2000-12-14 Volkswagen Ag Luftansauganlage für eine Brennkraftmaschine
DE10055399A1 (de) * 1999-11-20 2001-05-23 Mann & Hummel Filter Verfahren und Vorrichtung zur Beeinflussung des Schalls im Ansaugtrakt einer Verbrennungsmotors
EP1291570A3 (fr) 2001-09-07 2004-06-30 Avon Polymer Products Limited Amortisseur de bruit et de vibrations
EP1335124B1 (fr) 2002-02-09 2004-12-29 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Filtre à air pour un moteur à combustion
DE102011117639A1 (de) * 2011-11-04 2013-05-08 Audi Ag Kraftwagen mit einer Ansaugvorrichtung für eine Verbrennungskraftmaschine und Verfahren zum Betreiben einer Ansaugvorrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE734253C (de) * 1939-02-05 1943-04-12 Knecht Alfred Mit einem Geraeuschdaempfer vereinigter Nassluftreiniger
GB789180A (en) * 1955-05-26 1958-01-15 Coopers Mech Joints Improvements in or relating to combined gas filters and silencers
DE1027464B (de) * 1957-03-26 1958-04-03 Alfred Knecht Luftreiniger und Ansauggeraeuschdaempfer
DE1838112U (de) * 1961-06-19 1961-09-21 Bayerische Motoren Werke Ag Ansauggeraeuschdaempfer und luftfilter fuer brennkraftmaschinen.
FR1308738A (fr) * 1961-09-29 1962-11-09 Polycarbure Chambre d'expansion à résonance auto-réglable en fonction de la fréquence des pulsations, aménagée sur le parcours d'écoulement pulsatoire des fluides, et ses applications industrielles
DE2714100C2 (de) * 1977-03-30 1985-05-02 Volkswagenwerk Ag, 3180 Wolfsburg Luftansaugstutzen für eine Brennkraftmaschine
US4546733A (en) * 1983-03-22 1985-10-15 Nippondenso Co., Ltd. Resonator for internal combustion engines
DE3434476A1 (de) * 1984-09-20 1986-02-27 Bayerische Motoren Werke AG, 8000 München Gemischverdichtende, fremdgezuendete hubkolben-brennkraftmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615917A1 (de) * 1996-04-22 1997-10-30 Wolf Woco & Co Franz J Ansaugschalldämpfer und Kraftfahrzeug
US6705272B2 (en) 1999-10-26 2004-03-16 Filterwerk Mann & Hummel Gmbh Air intake system with an air filter
EP1186768A2 (fr) 2000-09-05 2002-03-13 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Filtre à air pour un moteur à combustion interne à plusieurs cylindres
DE10043532A1 (de) * 2000-09-05 2002-03-21 Porsche Ag Luftfiltereinrichtung für eine mehrzylindrige Brennkraftmaschine
US6726737B2 (en) 2000-09-05 2004-04-27 Dr. Ing. H.C.F. Porsche Ag Air filter arrangement for a multi-cylinder combustion engine
DE10043532B4 (de) * 2000-09-05 2010-11-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Luftfiltereinrichtung für eine mehrzylindrige Brennkraftmaschine
DE102007026416B4 (de) * 2007-06-06 2014-09-04 Audi Ag Vorrichtung zur Beeinflussung des Ansauggeräusches einer Brennkraftmaschine

Also Published As

Publication number Publication date
EP0242797A1 (fr) 1987-10-28
DE3613828A1 (de) 1987-10-29
DE3766743D1 (de) 1991-01-31
ES2019320B3 (es) 1991-06-16

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