Source: https://patents.google.com/patent/EP2620203B1/en
Timestamp: 2020-05-31 08:21:48
Document Index: 427028315

Matched Legal Cases: ['art 12', 'art 12', 'art 12', 'arts 12', 'art 12', 'art 12', 'art 12']

EP2620203B1 - Intake air filter for internal combustion engines - Google Patents
Intake air filter for internal combustion engines Download PDF
EP2620203B1
EP2620203B1 EP13165489.9A EP13165489A EP2620203B1 EP 2620203 B1 EP2620203 B1 EP 2620203B1 EP 13165489 A EP13165489 A EP 13165489A EP 2620203 B1 EP2620203 B1 EP 2620203B1
EP13165489.9A
EP2620203B2 (en
EP2620203A1 (en
Werner Blossey
Joachim Schuldt
2008-11-20 Priority to DE202008015440U priority Critical patent/DE202008015440U1/en
2009-11-16 Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
2009-11-16 Priority to EP09756466.0A priority patent/EP2355916B1/en
2013-07-31 Publication of EP2620203A1 publication Critical patent/EP2620203A1/en
2014-05-07 First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41531873&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2620203(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
2014-06-25 Publication of EP2620203B1 publication Critical patent/EP2620203B1/en
2018-02-21 Publication of EP2620203B2 publication Critical patent/EP2620203B2/en
238000002485 combustion Methods 0 title claims description 7
The invention relates to an intake air filter for internal combustion engines according to the preamble of claim 1.
From the EP 1 201 289 An intake air filter is known, which has a two-part housing with a main filter element and a secondary filter element. On the housing, an inlet for air to be cleaned and a outlet for purified air are arranged. The secondary filter element is connected to the outlet at one end side in such a way that no impurities enter the outlet in the event of a change or absence of the main filter element. At the other end, the secondary element is supported in the axial direction on the main filter element. This can lead to radial relative movements between the main filter element and the secondary filter element. These relative movements, the attachment to the outlet can be loosened or it can cause damage to the filter elements.
The disclosure EP 1216743 A1 discloses a filter system with a housing in which an oval filter element is arranged, and with a pre-separator. Within the main filter element, a secondary filter element is provided, which is mounted by means of a pin in a mating contour of the main element.
From the US 2006/0254229 A1 an air filter with a main filter element and a secondary filter element is known, wherein the secondary filter element has a projection which engages in a corresponding mating contour on an end plate of the main filter element.
The invention has for its object to prevent relative movement between the main filter element and the secondary element.
The intake air filter according to the invention serves to purify air for internal combustion engines. Such intake air filters can be used in stationary or mobile machines, especially in vehicles. The intake air filter has an openable housing with an inlet for air to be cleaned and an outlet through which the purified air from the intake air filter can flow out and reach the internal combustion engine. In advantageous embodiments, the housing is designed in three or more parts in order to realize simple shapes. These parts are then easy to produce, for example in plastic injection molding. The individual parts of the housing may be detachably or non-detachably connected to each other, wherein at least one part is releasably connected to the other parts in order to perform a filter element change can. Advantageous types of connection of the parts are, for example, screw connections, Verklipsungen, welding or gluing, which can be easily and inexpensively generated.
Between the inlet and the outlet there is arranged an annularly closed main filter element which has an arbitrary cross-section, e.g. circular or oval, may have. Furthermore, the main filter element may be cylindrical or conical. The main element has a filter medium, which is suitable for cleaning air. Such filter media may e.g. Cellulosic filter papers, synthetic fiber filter webs or other suitable materials, wherein the filter media may be single or multi-ply, pleated or wound. The main filter element is followed by a secondary element in the flow direction, wherein the secondary element is sealingly connected to the outlet. For this purpose, the secondary element with the outlet, e.g. be screwed, braced or snapped. On the, opposite the outlet arranged end face of the secondary element, a centering device is provided, which fixes the position of the secondary element within the main element in the radial direction by preventing radial movements. For this purpose, the centering device may e.g. are formed by radially outwardly projecting lugs on the outer circumference of the secondary element, which correspond to a corresponding mating contour on the inner circumference of the Hauptfilfierelements. Furthermore, in another embodiment, the centering device can also be arranged centrally in the region of a component central axis.
By manufacturing tolerances or temperature expansions, it may be in the axial direction to length differences of the secondary elements and main filter elements come. To avoid undesirable stresses in the longitudinal direction, the centering device has a length compensation in the axial direction. Thus, on the one hand radial movements, which can lead to an uncontrolled release of the secondary element prevented, and on the other hand axial movements, which can lead to tensions and impairments of the filter elements allowed.
According to an advantageous development of the intake air filter according to the invention, the main filter element has on its end face opposite the outlet over a fluid-tight bottom, which may be formed for example by polyurethane foam. Furthermore, the bottom may consist of a dimensionally stable material such as a metal sheet or a plastic disc and be sealed with an adhesive to the filter medium. Thus, further sealing means for separating the inlet from the outlet can be dispensed with. At the bottom of the centering device is arranged. Here, a part of the centering device integrally formed on the ground or as a separately executed component be releasably or permanently connected to the ground. Detachable connections can be produced, for example, by plugging, clipping or screwing. Undetachable connections between the bottom and the centering device can be formed, for example, by gluing or welding. The arrangement of the centering device on the ground is achieved that the secondary element has two spaced-apart bearings, which optimally support the secondary element and thus prevent unwanted movements. Furthermore, elaborate contours are unnecessary for the storage of the secondary element in the housing.
In a further embodiment of the invention, the secondary element on its end opposite the outlet via a fluid-tight cover, on which a part of the centering device is arranged. This cover may be configured according to the bottom of the main filter element described above. The arrangement of the centering device on the cover correspond to adjacent components and allow simple geometries in the housing.
It is advantageous that the main filter element has a support tube of a dimensionally stable material, in particular a thermoplastic material. The support tube has a plurality of air passages and thus generates no appreciable pressure loss for the air flowing through. Since the support tube is arranged on the outflow side of the filter medium, it can be prevented that the filter medium is deformed by the air flowing through. The fluid-tight bottom is advantageously formed on the support tube, whereby the function of the soil described above is integrated into the support tube required for the filter medium support. Function integration can reduce the number of components. Furthermore, additional connection points between bottom, filter medium and support tube are unnecessary.
A further embodiment of the invention provides that the secondary element has a support body, on which the cover is formed is. The comments on the support tube of the main filter element apply in the same way for the support body of the secondary element.
According to an embodiment not included in the claims, the centering device has a receiving device, which is designed as a receiving crown with distributed webs arranged. The webs of the receiving crown feathers slightly apart during assembly of the counterpart and thus allow a backlash-free storage of the counterpart in the receiving crown.
The centering device has an annular receiving wall as a receiving device. This receiving wall is designed as a rigid element. The corresponding counterpart can be inserted into the receiving wall and enclosed by this on the circumference or attached to the receiving wall and enclose the receiving wall.
The centering device further has a plug-in device designed as a pin, which forms the counterpart of the receiving device. Here, the pin may be designed as a rigid element and used in the receiving crown described above. In other embodiments, the pin may also consist of an elastic material and be designed as a compressible element. Thus, a play-free mounting of the secondary element in the main filter element is possible.
In a particular embodiment, an elastic or compressible ring is arranged on a rigid pin. This ring allows for easy installation as it compresses when inserting the pin into the receptacle becomes. This way, tolerances between the components can be compensated without creating play.
The invention will be explained in more detail with reference to embodiments. Hereby shows:
an intake air filter in section and
a section of the intake air filter in an alternative embodiment not covered by the claims.
In FIG. 1 An intake air filter is shown in section. The intake air filter has an openable housing 10, which consists of a thermoplastic material. In this embodiment, the housing 10 is formed by a lid 11, a middle part 12 and a pot 13. Due to the multi-part design of the housing 11, the items 11, 12, 13 have a simpler geometry and are thus easier and cheaper to produce. The lid 11 is firmly welded to the central part 12 and thus forms a structural unit. The pot 13 is detachably connected to the central part 12, wherein for fastening the parts 12, 13 to each other, for example clamping bracket (not shown) or the like can be used. The middle part 12 has an inlet 14, through which air to be purified flows into the housing 10. The lid 11 has an outlet 15, which is formed nozzle-shaped outwardly protruding on the lid 11. The inner contour of the lid 11 has a cylindrical circumferential Sealing collar 16, on which a main filter element 17 with its frontally arranged first end plate 18 is sealingly attached. The end plate 18 is made of a compressible polyurethane foam, which forms a sealing bead 19 and a disc portion 20. In the axial direction, the sealing bead 19 contacts the end face of the cover 11. In the disk portion 20 projects a pleated, annular closed filter medium 21, which is foamed frontally sealing in the disk portion 20. On the opposite end face of the filter medium 21, a second end plate 22 is disposed of polyurethane foam, which also has a disc portion 20, as described above. At the disc portion 20, a support bead 23 is formed, which may be performed circumferentially or divided into several subsegments annular. The support bead 23 is pressed axially in the housing 10, whereby axial play of the main filter element 17 in the housing 10 is prevented. This support bead 23 protrudes when Top13 is closed into an annular receptacle 24 and thus reduces vibrations of the filter element 17 in the housing 10. Inside the filter medium 21, a support tube 25 is arranged, which has a plurality of window-shaped passages 26. The support tube 25 has at its first end face a slotted end portion 27, which is enclosed by the disc portion 20 frontally. Thus, the main filter element 17 has a sufficient radial elasticity in order to be able to be plugged onto the sealing collar 16. On the opposite Front side, the support tube 25 has a closed, slightly inwardly curved bottom 28. On the inwardly projecting side of the bottom 28 a cup-shaped receiving wall 29 is arranged. In this receiving wall 29 protrudes a pin 30 of a disposed within the main filter element 17 secondary element 31 inside. This secondary element 31 has a support body 32 which, like the support tube 25 of the main filter element 17, has a plurality of rectangular passages 26. The support body 32 also has a fluid-tight cover 33 to which the pin 30 is integrally formed. On the pin 30, a compressible ring 34 is arranged, which serves for vibration reduction between the secondary element 31 and the main filter element 17. Furthermore, the assembly of the centering device, which is formed from the pin 30 and the receiving wall 29, facilitated by the ring 34. The height of the receiving wall 29 and length of the pin 30 is designed such that the main filter element 17 contacts the sealing collar 16 before the pin 30 contacts the receiving wall 29. Only when the main filter element 17 is further inserted, the pin 30 contacts the receiving wall 29. In order to facilitate the assembly can either the pin 30 or the receiving wall 29 an insertion bevel (not shown). Thus, the assembly of the main filter element 17 is facilitated.
On the pin 30 opposite end face of the support body 32, a fastening thread 35 is arranged, which is screwed into a corresponding mating thread 36 on the housing. For sealing between the secondary element 31 and the cover 11, an O-ring 37 is provided, which is supported on a surface of the counter-thread 36. The secondary element 31 furthermore has a filter fleece 38, which covers the region of the passages 26 and is fastened to the support body 32 in the region of the end faces by means of an adhesive 39. As an alternative to the bonding, the filter fleece 38 can also be welded sealingly to the support body 32 or, for example, foamed with PUR foam. Furthermore, the types of attachment of the filter fabric 38 may differ on the two end faces. Here, any combinations of attachment types of different end faces are possible, whereby the filter fabric 38 is welded on one end face, for example, and glued to the other end, for example.
For cleaning the intake air of the internal combustion engine, the unpurified air flows in the direction of arrow into the inlet 14 and distributed around the main filter element 17. By prevailing in the intake air filter pressure conditions, the air passes through the filter medium 21, wherein the particles contained in the air at the Filter medium are deposited. The purified air flows through the passages 26 to the secondary element 31. In the cleaned air, no further particles to be deposited are included, thus the air passes through the filter web 38 and the support body 32 therethrough. From the inner volume of the secondary element 31, the air flows in the direction of the arrow through the outlet 15 out of the intake air filter in the direction of the internal combustion engine.
When changing the main filter element 17, the pot 13 is first separated from the central part 12. The main filter element 17 can then be removed by hand, wherein the pin 30 is pulled out of the receiving wall 29 and the sealing bead 19 is removed from the sealing collar 16. The secondary element 31 remains screwed to the cover 11, thus no impurities can reach the outlet 15. When inserting a new main filter element 17 of the sealing bead 19 is again partially pushed onto the sealing collar 16 before the pin 30 dips into the receiving wall 29. After the main filter element 17 is again completely pushed onto the sealing collar 16 and the pin 30 is centered in the receiving wall 29, the pot 13 can be reconnected to the central part 12.
In FIG. 2 Fig. 3 shows a section of the intake air filter in an alternative embodiment not covered by the claims. Identical components are provided with the same reference numerals. In contrast to FIG. 1 the support body 32 has substantially triangular passages 26 '. Furthermore, no additional ring 34 is disposed on the pin 30 of the support body. Furthermore, the filter fabric 38 is welded without additional components with the support body 32. The main filter element 17 has at its bottom 28 via a receiving crown 40, which is formed from individual webs 41. These webs 41 spring apart from a defined pressure and thus allow the recording of the pin 30. In this case, then slides the hard plastic of the pin 30 on the webs 41, which also consist of a dimensionally stable plastic. For ease of assembly, the pin 30 has an insertion bevel 42, which may be designed as a chamfer or rounding, for example. The support tube 25 of the main filter element 17 has guide ribs 43 in its region near the end face, which effect a coarse centering of the secondary element 31 in the main filter element 17, thus facilitating assembly. The pin 30 has sufficient clearance in the receiving crown 40 in the axial direction, that a length compensation is achieved and so longitudinal tolerances or thermal expansions do not lead to damage of the filter elements 17, 31.
Of course, the individual sub-aspects of the different embodiments can be combined with each other in a suitable manner. Furthermore, a reversal of the geometric arrangement of pin and receptacle is conceivable.
Intake air filter for internal combustion engines, in particular for vehicles, featuring an openable housing (10) with an inlet (14) and an outlet (15), an annularly closed main filter element (17) sealingly disposed between the inlet (14) and the outlet (15) and an annularly closed secondary element (31) which is located downstream of the main filter element (17) in flow direction and sealingly connected with the outlet (15), wherein at the front face opposing the outlet (15) between the secondary element (31) and the main filter element (17) is provided a centering device (29, 30, 40, 41, 42), which is provided for the radial fixing of the position of the secondary element (31) inside of the main filter element (17),
wherein the main filter element (17) has at its front face opposing the outlet (15) a fluid-tight bottom (28) at which one part of the centering device (29, 30, 40, 41, 42) is disposed, wherein the centering device (29, 30, 40, 41, 42) has a reception device (29), which is designed as annular receptacle wall (29), and an insertion device (30), which is designed as tenon (30), wherein a compressible ring (34) is disposed at the tenon (30) in such a way that the ring (34) is compressed when the tenon is inserted into the receptacle.
Intake air filter according to claim 1, characterized in that the secondary element (31) has at its front face opposing the outlet (15) a fluid-tight cover (33), on which one part of the centering device (29, 30, 40, 41, 42) is disposed.
Intake air filter according to claim 1 or 2, characterized in that the main filter element (17) has a support tube (25), to which the bottom (28) is integrally molded.
Intake air filter according to claim 2 or claim 3 referred back to claim 2, characterized in that the secondary element (31) has a support structure (32), to which the cover (33) is integrally molded.
Intake air filter according to one of the above claims, characterized in that the centering device (29, 30, 40, 41, 42) has a length compensation in axial direction.
EP13165489.9A 2008-11-20 2009-11-16 Intake air filter for internal combustion engines Active EP2620203B2 (en)
DE202008015440U DE202008015440U1 (en) 2008-11-20 2008-11-20 Intake air filter for internal combustion engines
EP09756466.0A EP2355916B1 (en) 2008-11-20 2009-11-16 Intake air filter for internal combustion engines
EP09756466.0A Division EP2355916B1 (en) 2008-11-20 2009-11-16 Intake air filter for internal combustion engines
EP09756466.0 Division 2009-11-16
EP2620203A1 EP2620203A1 (en) 2013-07-31
EP2620203B1 true EP2620203B1 (en) 2014-06-25
EP2620203B2 EP2620203B2 (en) 2018-02-21
ID=41531873
EP09756466.0A Active EP2355916B1 (en) 2008-11-20 2009-11-16 Intake air filter for internal combustion engines
EP13165489.9A Active EP2620203B2 (en) 2008-11-20 2009-11-16 Intake air filter for internal combustion engines
US (2) US8758470B2 (en)
EP (2) EP2355916B1 (en)
CN (1) CN102223940B (en)
BR (1) BRPI0921971B1 (en)
DE (1) DE202008015440U1 (en)
WO (1) WO2010057843A1 (en)
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2008-11-20 DE DE202008015440U patent/DE202008015440U1/en not_active Expired - Lifetime
2009-11-16 US US13/130,564 patent/US8758470B2/en active Active
2009-11-16 EP EP09756466.0A patent/EP2355916B1/en active Active
2009-11-16 BR BRPI0921971-4A patent/BRPI0921971B1/en active IP Right Grant
2009-11-16 WO PCT/EP2009/065209 patent/WO2010057843A1/en active Application Filing
2009-11-16 CN CN200980146375.6A patent/CN102223940B/en active IP Right Grant
2009-11-16 EP EP13165489.9A patent/EP2620203B2/en active Active
2014-06-19 US US14/308,904 patent/US9192885B2/en active Active
DE202008015440U1 (en) 2010-04-08
EP2355916B1 (en) 2013-08-07
EP2620203B2 (en) 2018-02-21
EP2620203A1 (en) 2013-07-31
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BRPI0921971B1 (en) 2019-04-02
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Opponent name: DONALDSON COMPANY, INC.
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