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
  • F02M35/02—Air cleaners
  • F02M35/024—Air cleaners using filters, e.g. moistened
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/0002—Casings; Housings; Frame constructions
  • B01D46/0004—Details of removable closures, lids, caps or filter heads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
  • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
  • B01D46/2411—Filter cartridges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
  • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
  • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially

Definitions

• Filter device particularly intake air filter device for combustion engines
• the present invention relates to a filter device for filtering a gaseous medium, comprising a filter housing with an inlet opening and an outlet opening for the medium, a tubular filter element enclosed in the housing and disposed between said openings, and a pipe stub coupled to the outlet opening of the housing for coupling to a gas conduit, said pipe stub protruding axially from the outlet opening.
• a common type of air filter for internal combustion en ⁇ gines has a cylindrical filter housing with the outlet opening at one end.
• the pipe stub for connecting the filter to an intake conduit is fixed to the housing end plate and the tubular filter element has one end against the end surface surrounding the outlet with a seal there ⁇ between, which is compressed when the filter body is pressed against the outlet end plate by the other end plate of the housing which serves as a cover when in place.
• a known solution to this problem is to seal the filter element radially.
• the filter element is provided on its inner lateral surface at its outlet end with an inner sealing ring, which seals against a pipe end forming an extension of the outlet stub extending into the filter housing.
• the axial fit between the filter element and the filter housing is thereby not as critical as in axially sealing filters.
• a secondary or safety filter (which will be referred to below as a secondary filter) concentrically inside the tubular main filter.
• a secondary filter prevents particles from getting on to the clean side of the air filter when replacing the primary filter. It also prevents particles, which for some reason have passed by the primary filter, if it is dam ⁇ aged, for example, from being sucked into the engine.
• a so-called center rod is used which extends centrally through the filter and presses one end of the filter against a housing end plate.
• the purpose of the present invention is to provide a simple filter device, consisting of few parts, of the type described by way of the introduction, which removes the problems described above as well as additional problems, particularly in connection with radially sealing filters.
• the pipe stub is detachably joined to the housing and is solidly joined to a secondary filter dis ⁇ posed inside the tubular filter element, in order to be removed from the housing together with the secondary filter.
• the outer surface of the pipe stub can be the surface which is in contact with a sealing ring of a radially sealing primary filter element.
• a sealing ring of a radially sealing primary filter element Such an angular sealing surface extending into the filter housing cannot be made in one piece with the filter housing when blow moulding is employed.
• the design according to the 5 invention is particularly advantageous together with blow moulded plastic housings, but it can of course also be used in housings produced by other methods and in other material ⁇ .
• the design according to the invention also means that no other fastening means are required than a 10 simple rubber sleeve to fix the pipe stub to the housing, as will be described below.
• the reference numeral l in Figure 1 generally designates a filter housing and the reference numeral 2 generally de-
• the housing 1 consists of a cylindrical element 3 of blow moulded plastics material, for example, with end plates 4 and 5, of which end plate 4 forms a cover screwed onto the cylinder 3 and fixed to the filter element, whereas the
• the filter element 2 comprises a pair of perforated coaxial cylinders 8 and 9 with an intermediate filter material 10 of a type which is known per se, e.g. folded
• a pipe stub 11 in plastic or metal is solidly joined to a secondary or safety filter 20 consisting of a perforated tube or a cylindrical net 21, the right end of which is
• the secondary filter can be glued directly to the pipe stub.
• the stub 11 is fixed in the housing opening 6 with the aid of a sleeve 12 of rubber or a material similar to rubber.
• the stub has a portion lla of larger diameter and a portion lib of smaller diameter and a radial wall portion lie forming a transition between the portions lla and lib.
• the sleeve 12 has a thicker portion 12a and a thinner portion 12b. The end of the sleeve 12 extends out to the outer end of the pipe stub 11.
• the thicker portion 12a of the sleeve 12 has a peripheral groove 13, into which an edge portion 14 of the housing wall 5 extends.
• the end 15 of an engine intake conduit is forced over sleeve portion 12b and is held in place by a hose clamp, if the installation permits a relatively rigid intake conduit, the outer portion of the pipe stub can be extended towards the engine so that at least a major por ⁇ tion of the intake conduit 15 is made integral with the pipe stub.
• the right hand end of the filter element 2 in the Figure is covered by a thermoplastic elastomer which forms on one hand a cover without any specified sealing function and on the other hand an annular portion 17 extending over the inner cylinder liner of the filter element and forming a radial seal in contact with the portion lla of the pipe stub.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20376490

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (12)

Citations (3)

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• 1989
  • 1989-07-05 SE SE8902441A patent/SE8902441L/sv not_active Application Discontinuation
• 1990
  • 1990-04-04 US US07/781,211 patent/US5238476A/en not_active Expired - Lifetime
  • 1990-07-04 AU AU60744/90A patent/AU6074490A/en not_active Abandoned
  • 1990-07-04 WO PCT/SE1990/000480 patent/WO1991000424A1/en not_active Application Discontinuation
  • 1990-07-04 EP EP90910964A patent/EP0482062A1/en not_active Withdrawn

Patent Citations (3)

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