EP0348904B1 - Air filter unit for an industrial vehicle - Google Patents

Air filter unit for an industrial vehicle Download PDF

Info

Publication number
EP0348904B1
EP0348904B1 EP19890111689 EP89111689A EP0348904B1 EP 0348904 B1 EP0348904 B1 EP 0348904B1 EP 19890111689 EP19890111689 EP 19890111689 EP 89111689 A EP89111689 A EP 89111689A EP 0348904 B1 EP0348904 B1 EP 0348904B1
Authority
EP
European Patent Office
Prior art keywords
chamber
compartment
unit
filter
aperture
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
EP19890111689
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0348904A1 (en
Inventor
Giorgio Demichelis
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.)
Iveco SpA
Original Assignee
Iveco Fiat 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 Iveco Fiat SpA filed Critical Iveco Fiat SpA
Publication of EP0348904A1 publication Critical patent/EP0348904A1/en
Application granted granted Critical
Publication of EP0348904B1 publication Critical patent/EP0348904B1/en
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
    • F02M35/14—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
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/088—Water, snow or ice proofing; Separation or drainage of water, snow or ice
    • 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 an industrial vehicle.
  • Industrial vehicles are known to normally comprise a filter unit for the engine intake air consisting of a filter chamber housing a porous means for separating the particles suspended in the air, and means for pretreating the air upstream of the filter chamber to separate water and coarse particles from the air.
  • These pretreatment means generally comprise a vertical intake pipe or "snorkel" provided with an upper air inlet at a large distance from the ground, and means for separating water and powdery particles, such as cyclones and the like.
  • a filter unit known from the document FR-A-2 605 271 is provided with a plurality of cyclones each one including a set of inclined radial leafs to cause an helicoidal movement of the air.
  • the cyclones are arranged in a pretreatment chamber, which is positioned side-by-side with a filter chamber and communicates therewith.
  • Another filter unit known from the document FR-A-2 599 272 is provided with an inner filter chamber coaxial with an outer pretreatment chamber, this latter being divided in two portions by a coaxial annular wall for reducing the acoustic waves.
  • Two different centrifugal units formed of a plurality of helicoidal leafs are provided upstream and downstream of this wall to centrifuge the air.
  • the object of the present invention is to provide an air filter unit for an industrial vehicle which is free of the aforesaid drawbacks of known units.
  • an air filter unit for an industrial vehicle comprising an outer casing defining a pretreatment chamber provided with an upper inlet port and with interception and channeling means arranged substantially to separate the water from the intake air, and a filter chamber housing a hollow cylindrical filter and provided with an upper outlet port communicating with a central cavity of said filter, said pretreatment and filter chambers communicating with each other through a first aperture, said interception and channeling means comprising a first partition disposed vertically inside said pretreatment chamber and defining therein a first compartment communicating with said inlet port and a second compartment communicating with said first aperture, said first and second compartments communicating to each other through another aperture formed between the lower edge of said first partition and a lower wall of said pretreatment chamber, characterised in that said filter chamber is positioned externally to and side-by-side with said pretreatment chamber, said first aperture being provided in a wall of said pretreatment chamber facing said filter chamber; and in that said interception and channeling means also comprise a second partition extending from said facing
  • the reference numeral 1 indicates an air filter unit for an industrial vehicle.
  • the unit 1 comprises an outer casing 2 constructed in several parts conveniently of pressed sheet metal or moulded plastics, to define overall a pretreatment chamber 3 and a filter chamber 4 which are disposed side-by-side and communicate with each other.
  • the chamber 4 is substantially of barrel shape
  • the chamber 3 is of parallelepiped shape with a height less than the chamber 4, and is bounded laterally by three substantially flat walls 5 and by a concave wall 6 which substantially reproduces the profile of a portion 7 of a lateral wall of the chamber 4, which it faces.
  • the intake pipe stub 9 communicates with a zone of the chamber 3 which is external to the chamber 4 and has its mouth cross-section of elongated form in a horizontal and downwardly inclined direction.
  • the delivery pipe stub 10 communicates through a circular aperture 15 with a central zone of the filter chamber 4 which houses a hollow cylindrical filter 16 of conventional type. Said filter 16 therefore defines an axial duct 17 which faces the aperture 15.
  • the chambers 3 and 4 communicate with each other through a horizontal oblong aperture 18 provided in proximity to the upper wall 8.
  • the chamber 3 is divided transversely by a partition 19 which extends downwards from the upper wall 8 of the chamber 3, which is therefore divided into a first compartment 20 communicating with the intake pipe stub 9 and a second compartment 21 communicating with the aperture 18.
  • the partition 19 is provided with a lower rounded edge 24 having a cross-section shaped substantially as a droplet inclined towards the compartment 21, to define with the lower wall 25 of the chamber 3 an aperture 26 giving communication between the first compartment 20 and the second compartment 21.
  • a hollow pipe stub 27 of corresponding section which projects into the second compartment 21 and terminates with an outwardly rounded edge 28.
  • a projection 33 forming a drip ledge described hereinafter projects into the compartment 21 from the upper wall 8 of the casing 2.
  • the operation of the unit 1 is as follows. Air enters the unit 1 through the intake port 14 of the pipe stub 9 and passes into the compartment 20 of the chamber 3.
  • the purpose of the vertical partition 19 is to prevent any direct entry of water into the chamber 4 and to determine, within the chamber 3, a U-shaped path (compartment 20 - aperture 26 - compartment 21) which is able to separate the water droplets by centrifugal action onto the lower wall 25 of the chamber 3.
  • the purpose of the lower rounded edge 24 is to reduce the local pressure drop caused by breaking up the fluid flow.
  • the air then passes into the compartment 21, and most of the droplets which remain after the centrifugal action are entrained upwards by the fluid flow along the wall 6.
  • These droplets are then intercepted by the flow breaker partition 29, from which they precipitate onto the bottom wall 25.
  • the air now almost free of water, proceeds upwards passing beyond the flow breaker wall 29. Any minute droplets still present in suspension tend to concentrate on the upper wall 8, again by centrifugal effect, and to run along it to the drip ledge 33, which concentrates them into droplets of larger mass so that they fall by gravity.
  • the rounded edge 28 of the pipe stub 27 has the double purpose of reducing pressure drop through the mouth and to form a collection channel for conveying downwards by gravity the water which adheres to the outer walls of the pipe stub 27, including by the effect of the drip ledge 33.
  • the substantially “dry” air then passes through the pipe stub 27 and into the chamber 4 in which it is filtered by the filter 16, which retains the suspended impurities, after which it flows through the duct 17 and pipe stub 10 to the vehicle engine.
  • the water which collects on the base wall 25 of the chamber 3 is evacuated through the valves 30, provided for this purpose in the regions of low suction.
  • the shape and arrangement of the internal elements of the chamber 3 ensure almost total separation of the water or mud before the proper filtration. This means that the filter clogging problems are eliminated and that the snorkel can be dispensed with. Said effects combined with particular expedients in the construction of the elements (edge 24 of the partition 19, edge 28 of the pipe stub 27) result in considerable overall reduction of the intake pressure drop.
  • the partitions 29 and 19, conveniently dimensioned in relation to the dimensions of the chamber 3, provide an effective silencing of the engine intake noise.
  • a partition can be placed in the chamber 4 between the pipe stub 27 and that portion of the filter 16 facing it, to prevent rapid clogging of that zone.
  • the unit 1 can comprise a conventional snorkel either in place of the intake pipe stub 9 or connected to it.

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)
  • Air-Conditioning For Vehicles (AREA)
EP19890111689 1988-06-28 1989-06-27 Air filter unit for an industrial vehicle Expired - Lifetime EP0348904B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT5326488U 1988-06-28
IT5326488U IT214604Z2 (it) 1988-06-28 1988-06-28 Gruppo di filtraggio dell aria per un veicolo industriale

Publications (2)

Publication Number Publication Date
EP0348904A1 EP0348904A1 (en) 1990-01-03
EP0348904B1 true EP0348904B1 (en) 1993-03-17

Family

ID=11281326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890111689 Expired - Lifetime EP0348904B1 (en) 1988-06-28 1989-06-27 Air filter unit for an industrial vehicle

Country Status (4)

Country Link
EP (1) EP0348904B1 (it)
DE (1) DE68905389T2 (it)
ES (1) ES2039761T3 (it)
IT (1) IT214604Z2 (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3205670B2 (ja) * 1994-09-27 2001-09-04 日野自動車株式会社 ダクトの入水防止構造
JP3272557B2 (ja) * 1994-12-08 2002-04-08 日野自動車株式会社 ダクトのチャンネルユニット構造
ITTO20030746A1 (it) * 2003-09-25 2005-03-26 Fiat Auto Spa Filtro aria per veicolo a motore.
ATE414221T1 (de) * 2004-04-15 2008-11-15 Kwang Yang Motor Co Luftfilter für brennkraftmaschinen
DE102006041732B4 (de) * 2006-09-01 2016-03-10 Siemens Aktiengesellschaft Vorrichtung zum Filtern eines Luftstromes
DE102007011452A1 (de) 2007-03-06 2008-09-11 Siemens Ag Vorrichtung zur Vorbehandlung von Luft für ein Klimagerät eines Schienenfahrzeuges

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576402A1 (de) * 1967-06-03 1970-03-05 Porsche Kg Ansauganlage fuer Brennkraftmaschinen
DE2005788A1 (de) * 1970-02-09 1971-08-26 Hanomag Henschel Fahrzeugwerke GmbH, 3000 Hannover Linden Luftfilter, insbesondere fur Kraft fahrzeuge, mit einem davorgeschalteten Vorabscheider
DE3014148C2 (de) * 1980-04-12 1985-11-28 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Ölabscheider für Verdichter von Wärmepumpen und Kältemaschinen
JPS6033323Y2 (ja) * 1981-08-26 1985-10-04 川崎重工業株式会社 エアクリ−ナ
IT207796Z2 (it) * 1986-05-27 1988-02-15 Gilardini Spa Filtro aria per veicoli
IT208247Z2 (it) * 1986-10-17 1988-04-22 Gilardini Spa Gruppo di aspirazione dell aria per veicoli industriali

Also Published As

Publication number Publication date
IT8853264V0 (it) 1988-06-28
DE68905389T2 (de) 1993-10-14
EP0348904A1 (en) 1990-01-03
DE68905389D1 (de) 1993-04-22
IT214604Z2 (it) 1990-05-09
ES2039761T3 (es) 1993-10-01

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