EP0186754B1 - Filtre à air ouaté pour moteurs à combustion interne - Google Patents

Filtre à air ouaté pour moteurs à combustion interne Download PDF

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Publication number
EP0186754B1
EP0186754B1 EP85114044A EP85114044A EP0186754B1 EP 0186754 B1 EP0186754 B1 EP 0186754B1 EP 85114044 A EP85114044 A EP 85114044A EP 85114044 A EP85114044 A EP 85114044A EP 0186754 B1 EP0186754 B1 EP 0186754B1
Authority
EP
European Patent Office
Prior art keywords
filter
air
air filter
casing
valve element
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
Application number
EP85114044A
Other languages
German (de)
English (en)
Other versions
EP0186754A1 (fr
Inventor
Mauro Bodo
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.)
Lombardini Fabbrica Italiana Motori SpA
Original Assignee
Lombardini Fabbrica Italiana Motori SpA
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 Lombardini Fabbrica Italiana Motori SpA filed Critical Lombardini Fabbrica Italiana Motori SpA
Priority to AT85114044T priority Critical patent/ATE42609T1/de
Publication of EP0186754A1 publication Critical patent/EP0186754A1/fr
Application granted granted Critical
Publication of EP0186754B1 publication Critical patent/EP0186754B1/fr
Expired 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
    • F02M35/14—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
    • F02M35/02—Air cleaners
    • F02M35/026—Air cleaners acting by guiding the air over or through an oil or other liquid bath, e.g. combined with filters
    • 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

Definitions

  • This invention relates to an air filter for internal combustion engines in general, which is provided with a silencer unit for eliminating noise.
  • Normal air filters for internal combustion engines are known to comprise a casing having an inlet port and an outlet port, and housing suitable filter means which are traversed by the air flowing towards the inlet manifold of the engine concerned.
  • This excessive noise is mainly due to the hammering which the intake air stream undergoes when the engine intake valves close.
  • the present patent provides and protects an air filter in which said noise is practically eliminated, by means of a simple and rational design.
  • said valve element comprises an elastically deformable flap either in the form of a single element or comprising a plurality of adjacent coplanar sectors, and is disposed transversely to the passage of the filtered air directed towards the filter discharge port, and is further associated with a perforated transverse baffle, the apertures of which are alternately closed and opened by said flexible flap as stated.
  • stop means arranged to limit the stroke or degree of deformation of the valve element, in order to safeguard its structure.
  • US-A-4.438.828 discloses an air filter comprising a casing having an inlet port and an outlet port between which suitable filter means are interposed and including, downstream of the filter, an elastically deformable reed valve to enable the air to flow only in the direction of the filter outlet port.
  • US-A-4.326.862 discloses a reed valve, comprising elastically deformable flaps, which is disposed transversely to the passage of the filtered air.
  • the provision of the aforesaid silencer unit according to the invention means that that portion of air located between the filter and intake valve is trapped in the filter on termination of each intake stage.
  • the initial maximum or peak value of the hammer is considerably reduced, as are consequently its surging and transient effects on the surrounding metal parts, and prevents the air flowing back from the filter, with almost total elimination of noise.
  • Figure 1 shows a casing comprising an upper half shell 1 provided at its top with a side connector 2 for its connection to the intake manifold of an internal combustion engine, and at its base with a widened mouth 3.
  • An intake cap 4 consisting of a thin hollow structure with a blank upper wall and a perforated lower wall is centrally fixed to the top of said upper half shell 1 (see Figure 1).
  • Said lower half shell 6 has a narrower lower portion forming a container for containing an oil bath indicated diagrammatically by 33 in Figure 1, and an upper wider portion housing a normal filter cartridge 7, consisting essentially of a hollow holder filled with metal wire mesh.
  • the filter cartridge 7 fits practically exactly into the upper part of the lower half shell 6, but from which there emerges an outer circumferential rim 8 fitted with a gasket 9, this latter being clamped into the widened mouth 3 of the upper half shell 1 by means of an outer circumferential rim 10 provided on the mouth of the lower half shell 6.
  • an internal coaxial cup 12 having a depth greater than the level of the oil bath 33, and provided with a circumferential series of equidistant radial holes 13.
  • the lower transverse wall of the filter cartridge 7 is provided with air inlet openings 15, and its upper transverse wall is provided with corresponding discharge openings 16 for the filtered air.
  • a ring-shaped baffle 17 provided with a circumferential series of angularly equidistant apertures 18 is fixed in proximity to the open end of the upper half shell 1.
  • each aperture 18 is shaped as an isosceles trapezium with rounded corners, with its major base facing outwards and with its height disposed radially, but said apertures 18 can obviously be of any other shape, for example circular.
  • one aperture 18 is preferably provided for each discharge opening 16 of the filter cartridge.
  • each aperture 18 there is upperly associated a flap 19 with its upper surface of greater extension than the corresponding aperture 18 ( Figure 2), said flap 19 being constituted by a suitable flexible material, for example a thin metal foil, a rubber-coated fabric or another suitable material, such as a synthetic material.
  • a suitable flexible material for example a thin metal foil, a rubber-coated fabric or another suitable material, such as a synthetic material.
  • a rigid stop member 20 for limiting the degree of deflection of the flaps 19.
  • the member 20 consists essentially of a central flat connection ring from which there branches a series of upwardly bent, concave profiled plates (Figure 1).
  • the plates extend radially and are provided in the same number as the flexible flaps 19, their plan profile being approximately equal to that of these latter.
  • the stop member 20, the flexible flaps 19 and the perforated baffle 17 are fixed together by an inner circumferential set of rivets 21.
  • a compression ring 22 provided lowerly with a shoulder which clamps a seal gasket 23 against the underlying filter cartridge 7.
  • the filter When an engine intake valve opens, the filter is put under vacuum and is traversed in known manner by an air stream which causes the flaps 19 to lift or open (position shown by dashed and dotted lines).

Claims (5)

1. Filtre à air comprenant un boîtier (1, 6) muni d'un orifice d'entrée (4) et d'un orifice de sortie (2) entre lesquels sont interposés des moyens de filtrage convenables (7, 33) et renfermant en aval desdits moyens de filtrage, au moins un élément formant clapet (19) élastiquement déformable associé à un siège de clapet pour permettre l'écoulement de l'air seulement dans la direction de l'orifice de sortie, caractérisé en ce que le siège de clapet divise le boîtier de filtre en deux chambres et le siège de clapet se trouve immédiatement en aval des moyens de filtrage (7, 33).
2. Filtre à air tel que revendiqué à la revendication 1, caractérisé en ce que ledit élément formant clapet et ledit siège de clapet comportent une série de volets (19) minces et souples disposés en correspondance avec des ouvertures (18) prévues dans une cloison (17) sur laquelle ils sont fixés par une de leurs extrémités, leur contour dépassant légèrement au moins celui desdites ouvertures (18).
3. Filtre à air tel que revendiqué dans la revendication 1, caractérisé en ce que ladite cloison perforée (17, 18) est fixée de façon étanche aux surfaces du boîtier (1) qui définissent le passage pour l'air filtré.
4. Filtre à air tel que revendiqué dans la revendication 1 caractérisé en ce qu à l'arrière dudit élément de clapet se trouve un élément de butée pour limiter le déplacement des volets souples (19) lors de leur ouverture, ledit élément comprenant une série de parties profilées (20), une par volet (19), qui sont rabattues vers l'orifice de sortie d'air filtré (2).
5. Filtre à air tel que revendiqué dans la revendication 1, caractérisé en ce que ledit élément de butée (20) et ledit élément de clapet souple (19) sont fixés à ladite cloison perforée (17, 18) pour constituer une unité formant clapet.
EP85114044A 1984-12-04 1985-11-05 Filtre à air ouaté pour moteurs à combustion interne Expired EP0186754B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85114044T ATE42609T1 (de) 1984-12-04 1985-11-05 Gedaempfter luftfilter fuer verbrennungsmotoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT46882/84A IT1181144B (it) 1984-12-04 1984-12-04 Filtro-aria per motori a combustione interna di tipo insonorizzato
IT4688284 1984-12-04

Publications (2)

Publication Number Publication Date
EP0186754A1 EP0186754A1 (fr) 1986-07-09
EP0186754B1 true EP0186754B1 (fr) 1989-04-26

Family

ID=11260157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114044A Expired EP0186754B1 (fr) 1984-12-04 1985-11-05 Filtre à air ouaté pour moteurs à combustion interne

Country Status (5)

Country Link
EP (1) EP0186754B1 (fr)
AT (1) ATE42609T1 (fr)
DE (1) DE3569781D1 (fr)
ES (1) ES291190Y (fr)
IT (1) IT1181144B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19940610A1 (de) * 1999-08-27 2001-03-01 Mann & Hummel Filter Luftfilter
CN103244313B (zh) * 2012-02-02 2016-05-25 张永民 高效节能减排的内燃机空气滤清器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576542A1 (de) * 1966-04-29 1970-04-23 Fispa Spa Dichtungsvorrichtung an OElbad-Luftfiltern
US4326862A (en) * 1980-06-10 1982-04-27 Nagatoshi Suzuki Air cleaner for engines, having back flow gas shut-off function
JPS57188758A (en) * 1981-05-18 1982-11-19 Honda Motor Co Ltd Air cleaner device for motor cycle

Also Published As

Publication number Publication date
ES291190Y (es) 1987-01-16
EP0186754A1 (fr) 1986-07-09
IT1181144B (it) 1987-09-23
IT8446882A1 (it) 1986-06-04
IT8446882A0 (it) 1984-12-04
ATE42609T1 (de) 1989-05-15
ES291190U (es) 1986-05-16
DE3569781D1 (en) 1989-06-01

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