EP0242797A1 - 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
EP0242797A1
EP0242797A1 EP87105625A EP87105625A EP0242797A1 EP 0242797 A1 EP0242797 A1 EP 0242797A1 EP 87105625 A EP87105625 A EP 87105625A EP 87105625 A EP87105625 A EP 87105625A EP 0242797 A1 EP0242797 A1 EP 0242797A1
Authority
EP
European Patent Office
Prior art keywords
intake
intake silencer
diffusers
internal combustion
diffuser
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.)
Granted
Application number
EP87105625A
Other languages
German (de)
English (en)
Other versions
EP0242797B1 (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, in particular for internal combustion engines, of the type specified in the preamble of the independent claim.
  • Such an intake silencer is known for example from DE-AS 1 027 464.
  • the air drawn in by the internal combustion engine flows through a single diffuser to the damping chamber of the intake silencer.
  • a significant influence on the geometric dimensions of the intake silencer and in particular of the diffuser result from the air expenditure of the internal combustion engine at full load.
  • the acoustic effect of the intake silencer drops in an operating range of the internal combustion engine in which it has a noise level that is significantly above the intake noise.
  • the invention has for its object to improve an intake silencer of the type described in such a way that the acoustic effect of the intake silencer is significantly improved even at low and medium speeds without loss of power and torque of the internal combustion engine.
  • the object is achieved with the invention in that several and different sized diffusers are arranged on the intake silencer.
  • An intake noise damper with a plurality of diffusers which are of different sizes with regard to different diameters accordingly has many and different natural resonances, the smallest natural resonance being determined by the diffuser with the smallest dimensions.
  • an inherent resonance frequency of the intake silencer lying in the low speed range of the internal combustion engine can be achieved in an advantageous manner, so that with the associated, earlier onset damping with the intake silencer, the intake noise can be damped in a desirable manner without a loss of torque or Performance of the internal combustion engine must be accepted.
  • the attenuation of the intake noise achieved according to the invention in parallel operated diffusers of the intake noise damper can be further increased in that at least one diffuser is equipped with a shut-off element which can be controlled as a function of the load and speed.
  • Each diffuser is preferably equipped with a shut-off element, one of the two diffusers having a relatively small flow cross section in order to achieve a favorable torque curve.
  • the above-described embodiment of the invention offers the further advantage of a torque-increasing effect on the internal combustion engine.
  • the invention thus offers the additional advantage of designing one of the two diffusers for an optimal torque curve in the lower and middle speed range of the machine, the other diffuser being able to be designed for performance without accepting acoustic disadvantages in the entire operating range of the internal combustion engine.
  • At least one shut-off device is equipped with a servomotor which can be controlled via a preferably electronic control device.
  • a servomotor 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 a servomotor for a sensitive operation of the flaps.
  • 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.
  • 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.
  • the intake air from the free environment is supplied to the damping chamber 3 via diffusers 6 and 7 of different sizes.
  • the diffusers 6 and 7 are of approximately the same length and have, relative to one another, differently sized flow cross sections.
  • a flow cross section of the diffusers 6 and 7 is understood to mean an average intake cross section A M.
  • an intake silencer with a diffuser In general, in the case of an intake silencer with a diffuser, its length and its mean flow cross section, as well as the volume of the damping chamber of the intake silencer, are essential for the natural resonance frequency f 0 . If two of the aforementioned sizes are kept constant and the distribution of the third size according to different values, the same number of natural resonance frequencies f 0 can be achieved for an intake silencer with the number of divisions according to different values.
  • the intake silencer 1 with the diffusers 6 and 7 of different, average flow cross sections A M6 and A M7 accordingly has two natural resonance frequencies f 06 and f 07 .
  • 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.
  • each diffuser 8.9 of an intake silencer 10 is equipped with a shut-off device 11 or 12, the shut-off devices 11 and 12 being controlled as a function of the load and speed.
  • Each of the shut-off devices 11, 12 is equipped with a servomotor 13, 14 symbolized by dashed lines, 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 diffuser 8 is coordinated for this speed range in its geometric dimensions so that in this speed range rich, a favorable torque curve is achieved 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 in terms of its geometrical dimensions with regard to the torque or with respect to the power in accordance with its area of use.
  • the different geometric dimensions also result in two different natural resonance frequencies f 08 and f 09 1, where f 08 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 also 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 downstream via the intake manifold vacuum of the device 17 embodied 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.

Landscapes

  • 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)
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 true EP0242797A1 (fr) 1987-10-28
EP0242797B1 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 (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811051A1 (de) * 1998-03-13 1999-09-16 Mann & Hummel Filter Luftansaugeinrichtung für einen Verbrennungsmotor
WO2000077387A1 (fr) * 1999-06-09 2000-12-21 Volkswagen Aktiengesellschaft Systeme d'aspiration d'air pour moteur a combustion interne
WO2001031190A1 (fr) * 1999-10-26 2001-05-03 Filterwerk Mann+Hummel Gmbh Systeme d'aspiration pourvu d'un filtre a air
EP1101929A3 (fr) * 1999-11-20 2002-07-10 Filterwerk Mann + Hummel Gmbh Procédé et dispositif pour influencer le bruit dans l'admission d'un moteur à combustion
EP1335124A1 (fr) * 2002-02-09 2003-08-13 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Filtre à air pour un moteur à combustion
US6726737B2 (en) 2000-09-05 2004-04-27 Dr. Ing. H.C.F. Porsche Ag Air filter arrangement for a multi-cylinder combustion engine
US6983820B2 (en) 2001-09-07 2006-01-10 Avon Polymer Products Limited Noise and vibration suppressors

Families Citing this family (4)

* 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
DE19615917A1 (de) * 1996-04-22 1997-10-30 Wolf Woco & Co Franz J Ansaugschalldämpfer und Kraftfahrzeug
DE102007026416B4 (de) * 2007-06-06 2014-09-04 Audi Ag Vorrichtung zur Beeinflussung des Ansauggeräusches einer Brennkraftmaschine
DE102011117639A1 (de) * 2011-11-04 2013-05-08 Audi Ag Kraftwagen mit einer Ansaugvorrichtung für eine Verbrennungskraftmaschine und Verfahren zum Betreiben einer Ansaugvorrichtung

Citations (6)

* 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
US2886129A (en) * 1955-05-26 1959-05-12 Coopers Mech Joints Combined gas filters and silencers
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
FR2385906A1 (fr) * 1977-03-30 1978-10-27 Volkswagenwerk Ag Tuyau d'aspiration d'air de moteur a combustion interne
EP0119634A2 (fr) * 1983-03-22 1984-09-26 Nippondenso Co., Ltd. Résonateur pour moteurs à combustion interne
DE3434476A1 (de) * 1984-09-20 1986-02-27 Bayerische Motoren Werke AG, 8000 München Gemischverdichtende, fremdgezuendete hubkolben-brennkraftmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.

Patent Citations (6)

* 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
US2886129A (en) * 1955-05-26 1959-05-12 Coopers Mech Joints Combined gas filters and silencers
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
FR2385906A1 (fr) * 1977-03-30 1978-10-27 Volkswagenwerk Ag Tuyau d'aspiration d'air de moteur a combustion interne
EP0119634A2 (fr) * 1983-03-22 1984-09-26 Nippondenso Co., Ltd. Résonateur pour moteurs à combustion interne
DE3434476A1 (de) * 1984-09-20 1986-02-27 Bayerische Motoren Werke AG, 8000 München Gemischverdichtende, fremdgezuendete hubkolben-brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTACTS OF JAPAN, Band 10, Nr. 114 (M-473)[2171], 26. April 1986; & JP-A-60 243 362 (NIPPON DENSO K.K.) 03-12-1985 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811051A1 (de) * 1998-03-13 1999-09-16 Mann & Hummel Filter Luftansaugeinrichtung für einen Verbrennungsmotor
WO1999047807A1 (fr) 1998-03-13 1999-09-23 Filterwerk Mann + Hummel Gmbh Dispositif d'aspiration d'air pour moteur a combustion interne
DE19811051B4 (de) * 1998-03-13 2014-01-02 Mann + Hummel Gmbh Luftansaugeinrichtung für einen Verbrennungsmotor
WO2000077387A1 (fr) * 1999-06-09 2000-12-21 Volkswagen Aktiengesellschaft Systeme d'aspiration d'air pour moteur a combustion interne
WO2001031190A1 (fr) * 1999-10-26 2001-05-03 Filterwerk Mann+Hummel Gmbh Systeme d'aspiration pourvu d'un filtre a air
EP1101929A3 (fr) * 1999-11-20 2002-07-10 Filterwerk Mann + Hummel Gmbh Procédé et dispositif pour influencer le bruit dans l'admission d'un moteur à combustion
US6726737B2 (en) 2000-09-05 2004-04-27 Dr. Ing. H.C.F. Porsche Ag Air filter arrangement for a multi-cylinder combustion engine
US6983820B2 (en) 2001-09-07 2006-01-10 Avon Polymer Products Limited Noise and vibration suppressors
EP1335124A1 (fr) * 2002-02-09 2003-08-13 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Filtre à air pour un moteur à combustion
US6824591B2 (en) 2002-02-09 2004-11-30 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Air filter for an internal combustion engine

Also Published As

Publication number Publication date
DE3613828A1 (de) 1987-10-29
ES2019320B3 (es) 1991-06-16
DE3766743D1 (de) 1991-01-31
EP0242797B1 (fr) 1990-12-19

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