EP0096992A1 - Luftfilterzusammenbauten für Kolbenmaschinen - Google Patents

Luftfilterzusammenbauten für Kolbenmaschinen Download PDF

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Publication number
EP0096992A1
EP0096992A1 EP83303036A EP83303036A EP0096992A1 EP 0096992 A1 EP0096992 A1 EP 0096992A1 EP 83303036 A EP83303036 A EP 83303036A EP 83303036 A EP83303036 A EP 83303036A EP 0096992 A1 EP0096992 A1 EP 0096992A1
Authority
EP
European Patent Office
Prior art keywords
air
filter assembly
air filter
baffle
noise
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.)
Withdrawn
Application number
EP83303036A
Other languages
English (en)
French (fr)
Inventor
Spiridion Azzopardi
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.)
Fram Europe Ltd
Original Assignee
Fram Europe Ltd
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 Fram Europe Ltd filed Critical Fram Europe Ltd
Publication of EP0096992A1 publication Critical patent/EP0096992A1/de
Withdrawn legal-status Critical Current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
    • F02M35/024—Air cleaners using filters, e.g. moistened
    • F02M35/02475—Air cleaners using filters, e.g. moistened characterised by the shape of the filter element
    • F02M35/02483—Cylindrical, conical, oval, spherical or the like filter elements; wounded filter 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
    • F02M35/10—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
    • F02M35/12—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 air filter assemblies for reciprocating machines and relates especially to noise reduction in air filter assemblies for internal combustion engines.
  • Air filter assemblies for internal combustion engines are known in which an air filter housing is provided for mounting immediately above an engine air intake (typically the choke of a carburettor), whereby in operation air is drawn radially inwards through a generally cylindrical pleated paper filter element for cleaning air from a surrounding chamber connected to an inlet tube or duct. It is found that such apparatus is prone to transmit appreciable engine induction noise.
  • engine air intake typically the choke of a carburettor
  • the principle object of the present invention is to provide inexpensive and efficient means for reducing such noise.
  • an air filter assembly for a reciprocating machine including a housing having a chamber for a filter element providing a filtering barrier surrounding an air outlet port and an inlet duct communicating with a region of said chamber outside the filter element, characterised by noise attenuating means located in the air stream from said duct for streamlining and generally directing the air flow in two directions around the filter element but substantially obstructing the direct noise transmission path between the outlet port and said duct.
  • the attenuating means may have thin walls to form a sound absorbing enclosure which may preferably be filled with a sound absorbing material such as expanded polystyrene.
  • a generally flat cylindrical filter housing 1 is provided with a removeable upper end-cover 2 for providing access to the interior in known manner for replacement of a generally cylindrical impregnated pleated paper air filter 9 as seen in Fig. 2.
  • the main air inlet to the filter housing is at 3 via a tube or duct 4 providing access via a tapered portion 17 of the housing to a generally annular region 6 around the outside of the filter element and the outlet to the carburettor is via a port 5 which communicates with a region 7 on the inside of the filter element.
  • a temperature controlled vacuum operated motor 10 is incorporated in the tube or'duct 4 to control the opening and closing of a flap valve (not shown) to permit the entry of warm air at a further port 11, derived from an enclosure (not shown) around the exhaust manifold of the engine.
  • the apparatus may also incorporate means as described in the Specification of copending E. P. O. Patent Application No.82300731.5for preventing problems arising from loss of vacuum at full throttle settings.
  • a noise attenuating means in the form of a generally triangular baffle 12.
  • This is of hollow form filled with a noise absorbent material 13 such as expanded polystyrene.
  • the dimensions of the baffle are so chosen that it streamlines and generally directs the air flow in two directions around the filter element as indicated by the arrows.
  • the baffle 12 introduces negligible reduction of cross-sectional flow area for access of air to the chamber 6 and port 5 but at the same time it substantially obstructs the direct noise transmission path between the outlet port 5 and the duct 4.
  • the face 14 of the baffle 12 which faces the filter element is curved to conform generally with the curvature of the housing 1 whereas the walls 15 and 16 are substantially flat to conform with the adjacent walls of the tube or duct.
  • the precise shape of the baffle may be varied.
  • the sides such as 15 and 16 may require to be curved to correspond with curved adjacent walls of the tube or duct.
  • the face 14 and even the walls 15 and 1'6 may be acoustically formed to improve the sound attenuating quality of the assembly.
  • these faces may be perforated, or given a small sawtooth or corrugated form which does not appreciably detract from the streamline flow of air.
  • the tube or duct 4 may be of generally circular or oval cross-section.
  • the baffle may preferably be designed to be of generally conical shape. Whilst still streamlining and generally directing air flow in two directions around the filter element 9.
  • the baffle shape although not having vertical sides extending between upper and lower faces of the duct would be provided with means for supporting it in the desired position in the flow path and again such as to substantially obstruct the direct noise transmission path between the outlet port 5 and the duct 4.
  • the baffle may be of generally 'V' section. That is it may be provided with walls such as 15 and 16 or a circular conical or elliptical conical surface but having no base surface such as 14. In such a case noise attenuation will occur as a result of internal absorption and reflection within the baffle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP83303036A 1982-06-15 1983-05-25 Luftfilterzusammenbauten für Kolbenmaschinen Withdrawn EP0096992A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8217247 1982-06-15
GB8217247 1982-06-15

Publications (1)

Publication Number Publication Date
EP0096992A1 true EP0096992A1 (de) 1983-12-28

Family

ID=10531034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83303036A Withdrawn EP0096992A1 (de) 1982-06-15 1983-05-25 Luftfilterzusammenbauten für Kolbenmaschinen

Country Status (4)

Country Link
EP (1) EP0096992A1 (de)
BR (1) BR8303145A (de)
ES (1) ES523286A0 (de)
GB (1) GB2121877A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531353A1 (de) * 1985-09-03 1987-03-12 Audi Ag Ladeluftkuehler fuer aufgeladene brennkraftmaschine
WO1996016717A1 (de) * 1994-11-29 1996-06-06 Camfil Gmbh Gasfiltervorrichtung
US5549722A (en) * 1994-12-30 1996-08-27 Dana Corporation Air filter assemblies and a frustoconical air filter element for use with the assemblies

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105257440A (zh) * 2015-09-30 2016-01-20 重庆长安汽车股份有限公司 一种发动机的空滤器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1017065A (fr) * 1950-05-03 1952-12-01 Perfectionnements aux silencieux-filtres à air, plus particulièrement pour moteurs de véhicules automobiles
AT184406B (de) * 1953-07-07 1956-01-25 Alfred Knecht Insbesondere als Ansauggeräuschdämpfer ausgebildeter Luftreiniger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB754496A (en) * 1953-07-07 1956-08-08 Knecht Alfred An improved air-purifier, more particularly for damping the noise at suction
GB756640A (en) * 1954-02-23 1956-09-05 Houdaille Hershey Corp Improvements in or relating to intake silencers for internal combustion engines
GB787534A (en) * 1955-11-16 1957-12-11 Houdaille Industries Inc Improvements in and relating to air cleaner assemblies
GB1060853A (en) * 1966-06-05 1967-03-08 Coopers Mech Joints Improvements in or relating to air filters
FR1525139A (fr) * 1967-02-22 1968-05-17 Tecalemit Filtre à air
DE1576549A1 (de) * 1967-05-30 1970-11-26 Mann & Hummel Filter Ansaugluftfilter fuer Brennkraftmaschinen,Kompressoren und sonstige luftansaugende Maschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1017065A (fr) * 1950-05-03 1952-12-01 Perfectionnements aux silencieux-filtres à air, plus particulièrement pour moteurs de véhicules automobiles
AT184406B (de) * 1953-07-07 1956-01-25 Alfred Knecht Insbesondere als Ansauggeräuschdämpfer ausgebildeter Luftreiniger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531353A1 (de) * 1985-09-03 1987-03-12 Audi Ag Ladeluftkuehler fuer aufgeladene brennkraftmaschine
WO1996016717A1 (de) * 1994-11-29 1996-06-06 Camfil Gmbh Gasfiltervorrichtung
US5549722A (en) * 1994-12-30 1996-08-27 Dana Corporation Air filter assemblies and a frustoconical air filter element for use with the assemblies

Also Published As

Publication number Publication date
GB8314492D0 (en) 1983-06-29
ES8405112A1 (es) 1984-05-16
GB2121877A (en) 1984-01-04
BR8303145A (pt) 1984-01-31
ES523286A0 (es) 1984-05-16

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR IT NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19840909

RIN1 Information on inventor provided before grant (corrected)

Inventor name: AZZOPARDI, SPIRIDION