WO1991000424A1 - Filter device, particularly intake air filter device for combustion engines - Google Patents

Filter device, particularly intake air filter device for combustion engines Download PDF

Info

Publication number
WO1991000424A1
WO1991000424A1 PCT/SE1990/000480 SE9000480W WO9100424A1 WO 1991000424 A1 WO1991000424 A1 WO 1991000424A1 SE 9000480 W SE9000480 W SE 9000480W WO 9100424 A1 WO9100424 A1 WO 9100424A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
pipe stub
housing
filter device
outlet opening
Prior art date
Application number
PCT/SE1990/000480
Other languages
French (fr)
Inventor
Per Svensson
Sten Klippare
Original Assignee
Ab Volvo
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 Ab Volvo filed Critical Ab Volvo
Publication of WO1991000424A1 publication Critical patent/WO1991000424A1/en

Links

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.

Abstract

A filter device, especially an intake air filter for internal combustion engines, comprises a cylindrical filter housing (1) with inlet and outlet openings (7, 6) for the medium. In the outlet opening, the pipe stub (11) is fixed with the aid of an elastic sleeve (12). The pipe stub is solidly joined to a secondary or safety filter (20) which extends within a main filter (2), which has a radial seal (17) which seals against a portion (11a) of the pipe stub extending into the housing.

Description

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.
These axially sealing filters have a major disadvantage.
Due to the fact that the filter must be fitted between the housing end plates, special attention must be payed to the axial dimensions of the filter element and the filter housing. Any deviations can result in leakage or damage to the filter element.
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.
SUBSTITUTESHEET Common to the two known filter types described is. how¬ ever, that it is difficult when replacing a filter to prevent dirt on the surface of the used filter or on the inside of the filter housing from getting onto the "clean side" of the new filter.
For axially sealing filters it is known to use a secondary or safety filter (which will be referred to below as a secondary filter) concentrically inside the tubular main filter. Such a 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. In order to fi.x the secondary fi.lter i.n the filter housing, according to one known design, 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.
Such an arrangement places great demands on the rigidity of the housing and cannot be used in an entirely plastic housing.
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.
This is achieved according to the invention by virtue of the fact that 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. 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. This means that 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 materialε. 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 invention will be described in more detail with refer¬ ence to an example shown in the accompanying drawing, 15 which is a longitudinal section through the upper half of an intake filter of an internal combustion engine.
The reference numeral l in Figure 1 generally designates a filter housing and the reference numeral 2 generally de-
20 signates a main filter element enclosed in the housing l. 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
25 end plate 5 is integral with the cylinder 3 and has an outlet opening 6. An inlet pipe 7 opens into the cylinder 3. 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
30 paper or steel wool.
» 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
35 covered with an elastomer, the radially outer portion 22 of which forms a seal against the pipe stub 11. As an alternative, 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.
When replacing the main filter 2, the secondary filter 20 prevents dirt form being sucked into the engine if it should be started without the main filter in connection with service. The same appplies should the main filter be damaged. The invention has been described in the preceding with reference to an example with a radially sealing prim¬ ary filter, but it is obvious that the following patent claims also encompass filters with axially sealed primary filters.

Claims

1. 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 being enclosed in the housing and disposed between said open-
5 ings, 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, characterized in that the pipe stub (11) is detachably joined to the housing (1) and is solidly joined to a secondary filter 10 (20) disposed inside the tubular filter element (2) in order to be removed from the housing together with the secondary filter.
2. Filter device according to Claim 1, characterized in 15 that the end of the secondary or safety filter element
(20) facing the outlet (6) is inserted into and is sealing fixed against a portion (lla) of the pipe stub (11) ex¬ tending into the filter housing, a radial seal (17) on the tubular filter element (2) being in contact with the outer 20 surface of the pipe stub (11).
3. Filter device according to Claim 2, characterized in that said end of the secondary or safety filter (20) is surrounded by a sealing ring (22) force fitted against the
25 inner portion (lla) of the pipe stub and in that the inner end edge (lib) of the pipe stub (11) is folded or bent radially inwards.
*
4. Filter device according to Claim 2, characterized in 30 that said end of the secondary or safety filter element (20) is glued to the pipe stub (11).
5. Filter device according to one of Claims 1-3, char¬ acterized in that a sealing ring (12) is arranged between 35 the edge of the outlet opening (6) and the pipe stub (11).
6. Filter device according to Claim 4, characterized in that the sealing ring (12) has a peripheral groove (13), into which an edge portion (14) around the outlet opening (6) extends, and extends axially over the pipe stub (11) to form a seal against a gas conduit (15) coupled thereto.
PCT/SE1990/000480 1989-07-05 1990-07-04 Filter device, particularly intake air filter device for combustion engines WO1991000424A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902441A SE8902441L (en) 1989-07-05 1989-07-05 FILTERING DEVICE, IN PARTICULAR SUCTION FILTER FOR COMBUSTION ENGINES
SE8902441-8 1989-07-05

Publications (1)

Publication Number Publication Date
WO1991000424A1 true WO1991000424A1 (en) 1991-01-10

Family

ID=20376490

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1990/000480 WO1991000424A1 (en) 1989-07-05 1990-07-04 Filter device, particularly intake air filter device for combustion engines

Country Status (5)

Country Link
US (1) US5238476A (en)
EP (1) EP0482062A1 (en)
AU (1) AU6074490A (en)
SE (1) SE8902441L (en)
WO (1) WO1991000424A1 (en)

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US5704953A (en) * 1996-03-29 1998-01-06 Air Kontrol, Inc. Forced air system air filter
US7537631B2 (en) * 2002-10-28 2009-05-26 Donaldson Company, Inc. Filter cartridges; air cleaners; and methods
DE60316176T2 (en) 2002-10-28 2008-05-29 Donaldson Co., Inc., Minneapolis AIR FILTER; REPLACEABLE FILTER CARTRIDGE; AND METHOD
CN102350151B (en) 2004-08-25 2015-11-25 唐纳森公司 Air filter; Removable filter element and method
US8273143B2 (en) 2006-10-06 2012-09-25 Donaldson Company, Inc. Air cleaner, replaceable filter cartridges, and methods
US8414675B2 (en) 2007-04-03 2013-04-09 Donaldson Company, Inc. Air cleaner; air filter cartridge and method of manufacturing
US8292984B2 (en) 2007-07-20 2012-10-23 Donaldson Company, Inc. Air cleaner arrangments with end support for cartridge; components; and, methods
US8066791B2 (en) 2007-07-20 2011-11-29 Donaldson Company, Inc. Air cleaner arrangements with internal and external support for cartridge; components; and, methods
JP2014507277A (en) 2011-02-25 2014-03-27 ドナルドソン カンパニー，インコーポレイティド Air filter cartridge, components thereof and air cleaner assembly
JP6396272B2 (en) * 2015-09-29 2018-09-26 本田技研工業株式会社 Air cleaner device
EP3401000A1 (en) 2017-05-09 2018-11-14 Donaldson Company, Inc. Adapter and air filter cartridge being adapted for use with such an adapter
EP4342565A1 (en) * 2022-09-20 2024-03-27 MANN+HUMMEL GmbH Gas filter system

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US4491460A (en) * 1983-01-31 1985-01-01 Donaldson Company, Inc. Air cleaner and deflecting intake tube
DE3518076A1 (en) * 1984-05-21 1985-11-21 Honda Giken Kogyo K.K., Tokio/Tokyo AIR FILTER DEVICE FOR INTERNAL COMBUSTION ENGINES

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626008B2 (en) * 1975-06-19 1977-11-17 Donaldson Co. Inc, Minneapolis, Minn. (V.St.A.) AIR CLEANER
US4491460A (en) * 1983-01-31 1985-01-01 Donaldson Company, Inc. Air cleaner and deflecting intake tube
DE3518076A1 (en) * 1984-05-21 1985-11-21 Honda Giken Kogyo K.K., Tokio/Tokyo AIR FILTER DEVICE FOR INTERNAL COMBUSTION ENGINES

Also Published As

Publication number Publication date
AU6074490A (en) 1991-01-17
SE8902441D0 (en) 1989-07-05
EP0482062A1 (en) 1992-04-29
US5238476A (en) 1993-08-24
SE8902441L (en) 1991-01-06

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