DE102014001608A1 - Air filter element for use as air filter for filtering intake air of internal combustion engine in air filter system, has centering element provided with supporting structure for axially supports element in housing - Google Patents

Abstract

The element has end disks provided with a centering element around a longitudinal axis, where the element is radially centered and concentric to one of the end disks into a housing (108). The centering element is provided with a supporting structure for axially supports the element in the housing. The supporting structure and the centering element form an anti-twist plate. The supporting structure is radially arranged at outside of the centering element. A cyclone separator is provided in a region of an intake (102). A bottom dirt outlet (106) is provided at the housing or a lid (110). An independent claim is also included for an air filter system.

Description

Technical area

The invention relates to an air filter element, in particular for use as an air filter of an internal combustion engine, and a filter system for installing such a filter element.

State of the art

From the WO 2009/047196 A1 a filter element is known in which is ensured by the design of the seals of the filter element with two ring-bead-shaped arrangements and an intermediate sealing groove, on the one hand a sealing effect and on the other hand an axial support of the filter element is achieved in a housing. Especially with the use of plastic for sealing vibration-loaded elements a design is required, which works reliably even with extreme temperature fluctuations.

Next describes the WO 2009/047196 A1 a filter system with a filter element. This filter system is used in particular for filtering the intake air of an internal combustion engine and consists of a housing and a lid for receiving the filter element. The filter system is equipped with two annular grooves, which communicate with the sealing contours of the filter element in the area of the seal.

From the DE 20 2008 018 217 U1 an air filter assembly is known which comprises an air filter housing and an air filter cartridge. The housing seal at the open end of the air filter cartridge has a radially inwardly directed seal. At the closed end of the air filter cartridge is a projection / receiver assembly which prevents rotation of the air filter cartridge in the housing during operation and permits assignment of air cleaner cartridge to air filter type. A counterpart of the assembly is mounted on the second end of the air filter cartridge, the other counterpart is part of a housing cover. The projection / receiver arrangement consists of a coiled ring element, which has alternating convex and concave shaped sections and engages in a counterpart, which is negatively shaped.

Usually, the filter elements are replaced by air filters after a certain period of operation. Depending on the amount of dust, the service life of an air filter can be a few days (construction machinery) up to several months.

Especially with frequent replacement of filter elements, the reliable and reliable sealing of the filter element in a housing is important. The seal should be temperature resistant and vibration test carried out. Even in systems or facilities that are exposed to strong vibrations or vibrations, the sealing of the filter element must be ensured. At the same time, however, the filter element itself should as far as possible have no metallic elements so that it can be easily disposed of thermally.

An object of the invention is to provide a filter element with a reliable seal between the region of the unfiltered and the region of the filtered medium, which ensures safe mountability especially with frequent replacement of the filter element.

Another object of the invention is to provide a filter system for receiving such a replaceable filter element with a reliable seal and secure mountability.

The above objects are achieved according to one aspect of the invention by a filter element, wherein at least one of the end plates has a centering element arranged about the longitudinal axis, whereby the filter element is radially centered when installed in the housing and at the at least one end plate concentric with the centering a Supporting structure is provided for at least axial support of the filter element in the housing, and solved according to a further aspect of the invention of a filter system with such a filter element.

Favorable embodiments and advantages of the invention will become apparent from the other claims, the description and the drawings.

Disclosure of the invention

A filter element is proposed which comprises a filter body in concentric form with a longitudinal axis, a first end disk arranged on one end side and a second end disk arranged on the opposite end side, and a support pipe arranged concentrically between the first and the second end disk about the longitudinal axis.

According to the invention, at least one of the end disks has a centering element arranged about the longitudinal axis, whereby the filter element can be radially centered when installed in the housing, wherein a support structure for at least axial support of the filter element in the housing is provided on the at least one end disk concentric with the centering element. Preferred are Centering and / or support structure made in one piece with and as part of the end plate.

In an alternative embodiment, the centering structure may be designed so that it can take over the axial support function of the support contour.

In a preferred embodiment, the centering element and / or the support structure is arranged radially in the region of the support tube.

The centrally arranged centering element has the advantage that closer tolerances can be taken into account for a central radial guidance of the filter element, in particular in the case of large filter elements, than in the case of a guide arranged on the outer edge of the filter elements. Also, in this separation of centering and support function, the assembly of the filter element in the housing can be very low, since in this way when closing the housing cover only the centering takes place, which is executable with low mounting force, and only then the tension of the filter element in the housing over the support function can be done. In this way, the filter element is already placed in the correct location in the frictional assembly and the situation must not be corrected under tension any longer, which could damage the filter element to sealing and / or centering.

This is for larger and thus heavier filter elements especially for the construction machinery or agricultural machinery advantage and also optimizes the repeated removal and installation of the filter elements in the service. When using such a filter element in the construction machinery or agricultural machinery sector, the filter load with dust and dirt particles is very high, so that the weight of a loaded filter element can increase by a few kilograms. The filter element as well as the associated filter system must be designed to be robust.

It is also about the shape of the centering and its counter-element in the lid of the housing to realize a assignability of the filter element to a filter system, so automatically the right filter element is used for the filter system and no wrong spare part can be installed.

Preferably, the centering element extends axially from the end face of the in particular substantially flat end disk facing away from the interior of the filter element.

In a favorable embodiment, the support structure and / or the centering element can form an anti-twist device of the filter element. Conveniently, both support structure and centering can be made of a flexible plastic, which allows, for example, cut edges of a lid in the plastic and thus allow a firm fixation of the filter element against rotation even with vibrations during operation. By such a rotation, the seals on the filter element and the housing are less stressed and the service life of the filter element can be increased.

Advantageously, the support structure can be arranged so that it can be toothed when installed in the housing with rib-shaped elevations in an inner cover contour of the housing. By such a toothing an anti-rotation of the filter element is provided in the housing, whereby the positional stability of the filter element is strongly promoted in vibration excitation during operation.

Conveniently, the at least one end plate may have a centering ring as a centering element, which cooperates with an installed in a cover of the housing counter element when installed in a housing, whereby the filter element when installed in the housing is radially centered and feasible. The advantage of a centering ring as a centering element lies in the relatively simple production of such a structure, since the corresponding injection molding tool can be kept simple. Further, the filter element can be mounted in the housing without precise rotational positioning, since the arrangement is designed rotationally symmetrically by a centering ring. Especially with heavy filter elements for construction and agricultural machinery is such ease of mounting advantage. The counter element in the lid ensures an accurate radial guidance without much effort.

In an advantageous embodiment, the support structure can be arranged radially outside of the centering. This gives a clear separation of the centering and the support function. The centering can be done by the physical separation without much effort, since the force is applied to the tension for supporting the filter element in the housing at a different location in the end plate, which greatly facilitates the assembly of the filter element.

Advantageously, the at least one end disk support nubs have as supporting structure, which lie in an installation in the housing on an inner cover contour of the housing adjacent in the radial direction inwardly and / or outside and form an axial support on the housing. In contrast to the state of Technology, where supporting nubs are known, which deform axially, these support nubs have the property that the filter element is held firmly in position by the supporting effect in the axial and in the radial direction, even with strong vibrations of the housing. A deliberately strong radial deformation component of the support knobs allows a very good support of the filter element. In addition, due to the radial bending of the support nubs tangential tensile forces that generate greater stiffness and restoring forces. This is for larger and thus heavier filter elements especially for the construction machinery or agricultural machinery advantage and also optimizes the repeated removal and installation of the filter elements in the service.

In a further advantageous embodiment, the at least one end disk support nubs have as centering, which cooperate with a mounted in a cover of the housing counter structure when installed in a housing, whereby the filter element is radially centered and feasible when installed in the housing. In this embodiment, the Abstütznoppen can perform the function of a pre-centering during assembly of the filter element in the housing and cause at relatively little effort in this pre-assembly phase, the filter element is already performed in the correct position before completing the cover. In this way, a seal of the filter element to the housing in the intended position is safer to ensure than when the filter element is performed until the final closing of the lid in position.

Expediently, the support structure can be arranged radially inside the centering element. A guide of the filter element for the pre-centering is easier to accomplish by the greater leverage of a further outward centering and by the further inside support structure more force can be applied in the bracing.

Advantageously, the at least one end plate may have a closed ring as a support structure, which forms an radial and axial support on the housing when fitting in the housing on an inner cover contour of the housing. A closed ring is simple to implement in terms of manufacturing technology, does not require exact rotational positioning of the filter element during assembly in the housing and has a stable structure as a support function in the radial and axial direction without rotational preferred direction.

In an expedient embodiment, the centering element can be arranged so that it can be toothed when installed in the housing with rib-shaped elevations in the inner cover contour of the housing. In this way, a simple rotation of the filter element in the housing can be implemented. The toothing can be done by positive engagement in, for example, a segment-like broken centering or by traction when rib-shaped elevations of the lid cut into the soft elastic material of a centering.

Advantageously, the second end disk, as well as the first end disk, consist of a polyurethane foam or an elastomer. Of course, it is also possible to produce the end plate of several plastic components, so as to ensure optimum deformability over a wide temperature range, as it can occur in practice. So thermoplastic materials are not excluded. Both end plates can be welded or glued to the filter body to effect a stable connection.

Conveniently, the first end plate may have a radial seal with respect to the housing. This has the advantage that in addition to a good seal and thus a safe filter effect, a doppelradiale leadership of the filter element in the housing can be effected by the radial seal and the radial clamping of the support studs in the lid and thus a very stable mounting of the filter element is formed in the housing.

Conveniently, the filter element can be used as an air filter, in particular as an air filter of an internal combustion engine. The safe operation of internal combustion engines is also based on a safe and cheap filtering of the intake air for combustion operation. The filter element described represents an economical possibility for this.

Also advantageous is the use of the filter element as a particle filter, in particular as an oil filter or fuel filter of an internal combustion engine. Again, the safe installation and economic interchangeability of the filter element described are of crucial importance.

According to a further aspect, the invention relates to a filter system with a filter element according to one of the preceding claims, comprising a housing which is constructed essentially concentrically about a longitudinal axis, a lid closing the housing, which is likewise constructed concentrically around the longitudinal axis and on its inside a counter element and / or a lid contour having, which with a Centering of the at least one end plate cooperates, and which has on its inside a lid contour, to which a support structure of the at least one end plate can be applied and supported, arranged on the housing and / or cover inlet for supplying the medium to be filtered, in particular air, wherein the housing an outlet for discharging the filtered medium is provided concentrically to the longitudinal axis, wherein on the housing in the region of the outlet, a sealing contour is provided which corresponds to the radial seal of the first end plate of the filter element, wherein the filter element is interchangeable disposed in the housing of the filter system.

The main advantage of such a filter system lies in the safe and stable installation of the filter element and a very economic interchangeability of the filter element in case of service. Especially with low downtimes, as they can occur in agricultural and construction machinery use, the rapid interchangeability of great importance.

Advantageously, a cyclone separator may be provided in the region of the inlet of the filter system and a dirt outlet may be provided on the housing or on the lid. This cyclone separator consists of a guide geometry, which sets the medium to be filtered into a rotation. By this rotation, the dirt is concentrated in the area of the housing wall and discharged at a suitable location via a dirt outlet. By pre-separation of most of the dirt from the air to be filtered, the service life of the actual filter element can be significantly extended.

According to a further embodiment of the invention, a secondary element may be arranged in the interior of the filter element. The secondary element, which may consist of a supporting structure, which is covered with a permeable filter medium, for example a fleece, has the task of keeping the outlet of the filter system still closed when replacing the filter element so that no dirt enters this area while the filter element is being cleaned or replaced. The secondary element is connected in a preferred embodiment via a screw connection to the housing and provided to the housing with a seal.

Brief description of the drawings

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

They show by way of example:

1 a perspective view of a filter system according to an embodiment of the invention with tangential inlet, centric outlet and bottom dirt outlet;

2 a perspective view of a filter system according to an embodiment of the invention with radial inlet and centric outlet;

3 a longitudinal section through a filter system according to an embodiment of the invention with tangential inlet, centric outlet and bottom-side dirt outlet;

4 a perspective view of a filter element according to an embodiment of the invention with a view of a second end plate with a centering and Abstütznoppen;

5 a perspective view of the housing cover of a filter element according to an embodiment of the invention with rib-shaped elevations in an inner cover contour;

6 a partial longitudinal section of a filter system according to an embodiment of the invention with centering ring and Stütznoppen in the second end plate;

7 a perspective view of a portion of a filter system with a view of a second end plate with a closed ring as a support structure and Abstütznoppen as a centering element according to another embodiment of the invention; and

8th a partial longitudinal section of a filter system according to the embodiment of the invention in 7 ,

Embodiments of the invention

In the figures, the same or similar components are numbered with the same reference numerals. The figures are merely examples and are not intended to be limiting.

1 shows a perspective view of a filter system 100 according to an embodiment of the invention with tangential inlet 102 , centric outlet 104 on a housing front side and bottom-side dirt outlet 106 , Shown is a round filter design, consisting of a housing 108 that exists with a lid 110 , for example, with screw or bayonet lock, is closed.

When used as an air filter system, dust-laden air flows into the inlet 102 , which is arranged tangentially to the internally mounted air filter element, so that the air inside the housing 108 is offset by a filter medium partially enclosing flow protection in a rotational movement. Filter element and Anströmschutz are not shown in the drawing. Due to the cyclone effect caused by the rotational movement of the air, centrifugal forces act on the dust particles of the flowing air, so that they partly deposit on the housing wall and via the dirt outlet 106 from the filter system 100 can flow out. As a result, the filter element is less loaded, the service life of the filter element is increased. The purified air can through the centric outlet 104 out of the case 108 be dissipated.

2 shows a perspective view of a filter system 100 according to an embodiment with cover-side inlet 102 and centric outlet 104 , Shown is also a round filter design, consisting of a housing 108 that exists with a lid 110 is closed. The inlet, through which dust-laden air can enter the housing, is in this case arranged centrally above the internally mounted filter element. The outlet 104 , through which the purified air can flow, is also like in 1 arranged centrally.

Such filter systems as in 1 and 2 are usually used in construction machinery and agricultural machinery. They are characterized by great robustness and have short life due to the high filter load. A filter system 100 with loaded filter element must tolerate a weight gain of 10 kg or more.

In 3 is a longitudinal section through a filter system 100 according to an embodiment with tangential inlet 102 , centric outlet 104 and bottom dirt outlet 106 shown. The housing 108 of the filter system 100 is with a lid 110 locked. A filter element 10 consisting of concentric to a longitudinal axis L arranged support tube 14 and filter body 12 is on two opposite ends 15 . 17 with a first and a second end plate 16 . 18 , which may for example be made of castable polyurethane, in particular polyurethane foam or an elastomer finished. Second end plate 18 and support tube 14 of the filter element 10 can also be made in one piece. The filter body 12 For example, it may be zig-zag folded, annularly closed and, for example, made of paper, made of paper reinforced with plastic fibers and / or consist of a paper with one or more layers of plastic fibers.

The second end disk 18 has a centrally arranged centering element 22 on (in the figure as a centering ring 22a shown), after insertion of the filter element 10 in the case 108 and closing the lid 110 a centrally arranged counter element 24 encloses and so a radial guidance of the filter element 10 when installed in the housing 108 and later in the operation of the filter system 100 causes. The second end disk 18 also has support nubs 20a as a support element 20 on which in the radial direction 38 outside the centering element 22 are arranged circularly about the longitudinal axis L and when installed in the female housing 108 on an inner lid contour 114 of the lid 110 fitting in the radial direction 38 to the inside and / or outside and thereby on the housing 108 support axially. This is the filter element 10 in the case 108 after closing the lid 110 firmly fixed in the radial and axial directions.

At the opposite end 15 of the filter element 10 is at the first end disk 16 , their stability through a reinforcing ring 31 is increased, a radial seal 26 attached, with the help of the filter element 10 about the seal contour 116 on the housing 108 radially supports and seals the unfiltered against the filtered air space. The filter element 10 is thus both axially and twice radially against the housing 108 braced.

Dust-laden air can pass through the inlet 102 in the direction of the arrow 40 inflow, which in this case is shown as a tangential inlet and by means of a cyclone separator 36 caused rotation of the air allows cyclone operation. Particles of dust can be deposited in advance by the rotational movement on the inner housing wall and through the dirt outlet 106 when installing the filter housing 108 in a horizontal position downwards by gravity from the filter system 100 be emptied. The air flows through the filter body during operation after partial separation of the dust particles 12 in the direction of the arrow 42 . 44 inside 50 of the filter element. Dust particles, depending on the filter medium, are suspended in the filter medium above a certain size. Depending on the dust input must therefore the filter element 10 be replaced after a certain life.

About the outlet 104 the filtered air flows in the direction of the arrow 46 from. Internally 50 of the filter element 10 is a secondary element 28 attached, essentially from a supporting structure with a relatively permeable filter medium, such as a nonwoven, and when replacing the filter element 10 in the case 108 to protect the further air duct, for example an internal combustion engine, against penetrating dust particles and other objects remains. The secondary element 28 For example, with a screw on the outlet side of the housing 108 screwed.

The filter element 10 can be used as an air filter, in particular as an air filter of an internal combustion engine. In principle, however, a use as an oil filter or fuel filter in a similar design is conceivable.

4 shows a perspective view of a filter element 10 that comes from a filter body 12 and two end faces 15 . 17 is formed, according to an embodiment of the invention with a view of a second end plate 18 with a centering ring 22a and support nubs 20a , The front side 17 gets through the end disk 18 defined, which for the radial fixation of the filter element 10 in the case 110 a filter system, as in 3 is shown, a centering ring 22a as centering element 22 as well as supporting knobs 20a as a support structure 20 having. So can a counter element 24 a lid 110 , as in 3 shown in the centering ring 22a engage and so the filter element 10 fix radially. The support nubs 20a which, seen radially, outside the centering ring 22a Lie, lie down when closing the case 108 with the lid 110 to an inner lid contour 114 and fix the filter element 10 in the axial direction L.

5 shows a perspective view of the housing cover 110 with rib-shaped elevations 112 a filter element 10 according to an embodiment of the invention, as in 3 shown. Centrally located inside the lid 110 is a counter element 24 in the form of a hollow cylinder to be seen during assembly of the filter element 10 in the case 108 when closing the lid 110 in a centering ring 22a the second end plate 18 intervenes. The support nubs 20a the end plate 18 lie against the inner lid contour 114 and ensure by the teeth with the rib-shaped elevations 112 for a rotationally secure attachment of the filter element 10 in the case 108 ,

6 represents a partial longitudinal section of a filter system 100 according to an embodiment of the invention with centering ring 22a and support nubs 20a in the second end disk. The counter element 24 of the lid 110 engages in the assembly of the lid 110 on the case 108 in the centering ring 22a as centering element 22 the second end plate 18 of the filter element 10 to radially fix it in this way. The support knob 20a as a support structure 20 , is on the drawing in the penetration of the lid 110 and is in the real implementation when putting the lid 110 through the inner lid contour 114 move radially inward or outward and so an axial clamping of the filter element 10 cause in the housing.

7 shows a perspective view of a part of a filter system 100 with a view of a second end plate 18 with closed ring 20b as a support structure 20 and support nubs 22b as centering element 22 according to a further embodiment of the invention. In this embodiment, the second end plate 18 designed so that the Stütznoppen 22b as centering element 22 in the radial direction 38 farther out than the support structure 20 are arranged and when placing the lid 110 on the case 108 a pre-centering of the filter element 10 in the housing over the lid contour 114b cause, so that the filter element is radially centered and feasible when installed in the housing. Here is the centering element 22 arranged so that it fits into the housing when installed 108 with rib-shaped elevations 112 in the inner lid contour 114b of the housing 108 is toothed. Will the lid 110 then finally closed, the closed ring sets 20b to the inner lid contour 114 and thereby causes a radial and axial support and tension of the filter element 10 in the case 108 ,

In 8th is in a partial longitudinal section of a filter system according to the embodiment of the invention in 7 to recognize this process more clearly. The support nubs 22b cause a pre-centering of the filter element 10 because they are far outside on the inner lid contour 114b Fitting itself center, while the closed ring 20b by the concern with the lid contour 114 when closing the lid 110 a stable radial strain of the filter element 10 in the case, with the lid on the closed ring 20b when closing the lid 110 presses and thereby also for a radial and axial clamping for fixing the filter element 10 in the housing ensures.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2009/047196 A1 [0002, 0003]
• DE 202008018217 U1 [0004]

Claims (17)

Air filter element ( 10 ) for the filtration of intake air of internal combustion engines, comprising a filter body ( 12 ) in concentric form with a longitudinal axis (L), a first at an end face ( 15 ) arranged end plate ( 16 ) and a second one at the opposite end ( 17 ) arranged end plate ( 18 ), about the longitudinal axis (L) concentrically between the first and the second end plate ( 16 . 18 ) arranged support tube ( 14 ), wherein at least one of the end discs ( 18 ) arranged around the longitudinal axis (L) centering element ( 22 ), whereby the filter element ( 10 ) when installed in the housing ( 108 ) is radially centered and at the at least one end plate ( 18 ) concentric with the centering element ( 22 ) a support structure ( 20 ) for at least axial support of the filter element ( 10 ) in the housing ( 108 ) is provided. Air filter element according to claim 1, wherein the support structure ( 20 ) and / or the centering element ( 22 ) a rotation of the filter element ( 10 ). Air filter element according to claim 1 or 2, wherein the supporting structure ( 20 ) is arranged so that when installed in the housing ( 108 ) with rib-shaped elevations ( 112 ) in an inner lid contour ( 114 ) of the housing ( 108 ) is toothed. Air filter element according to one of the preceding claims, wherein the at least one end plate ( 18 ) a centering ring ( 22a ) as a centering element ( 22 ), which when installed in a receiving housing ( 108 ) with one in a lid ( 110 ) of the housing ( 108 ) arranged counter element ( 24 ), whereby the filter element ( 10 ) when installed in the housing ( 108 ) is radially centered and feasible. Air filter element according to claim 4, wherein the supporting structure ( 20 ) seen radially outside of the centering element ( 22 . 22a ) is arranged. Air filter element according to claim 4 or 5, wherein the at least one end plate ( 18 ) Support pads ( 20a ) as a supporting structure ( 20 ), which when installed in the housing ( 108 ) on an inner cover contour ( 114 ) of the housing ( 108 ) abutting in the radial direction ( 38 ) to the inside and / or outside and an axial support on the housing ( 108 ) form. Air filter element according to claim 1 or 2, wherein the at least one end plate ( 18 ) Support pads ( 22b ) as a centering element ( 22 ), which when installed in a receiving housing ( 108 ) with one in a lid ( 110 ) of the housing ( 108 ) arranged counter-structure ( 114b ), whereby the filter element ( 10 ) when installed in the housing ( 108 ) is radially centered and feasible. Air filter element according to claim 7, wherein the supporting structure ( 20 ) seen radially within the centering element ( 22 . 22b ) is arranged. Air filter element according to claim 7 or 8, wherein the at least one end plate ( 18 ) a closed ring ( 20b ) as a supporting structure ( 20 ), which when installed in the housing ( 108 ) on an inner cover contour ( 114 ) of the housing ( 108 ) abutting a radial and axial support on the housing ( 108 ). Air filter element according to one of claims 7 to 9, wherein the centering element ( 22 ) is arranged so that when installed in the housing ( 108 ) with rib-shaped elevations ( 112 ) in the inner lid contour ( 114b ) of the housing ( 108 ) is toothed. Air filter element according to one of the preceding claims, wherein the first and / or the second end plate ( 16 . 18 ) consists of a polyurethane foam or an elastomer. Air filter element according to one of the preceding claims, wherein the first end plate ( 16 ) a central outflow opening and a radial seal ( 26 ) for sealing against the housing ( 108 ) having. Air filter element according to one of the preceding claims, wherein the centering element axially from a substantially flat end surface of the end plate on the one by the filter body ( 12 ) enclosed interior facing away from side. Air filter element according to one of the preceding claims, wherein the second end disk ( 18 ) is executed closed and the centering element ( 22 . 22a ) and / or the supporting structure ( 20 ) is arranged on the second end disk. Air filter system ( 100 ) with an air filter element ( 10 ) according to any one of the preceding claims, comprising - a housing ( 108 ), which is constructed essentially concentrically about a longitudinal axis (L), - a housing ( 108 ) closing lid ( 110 ), which is also constructed concentrically about the longitudinal axis (L) and on its inside a counter element ( 24 ) and / or a lid contour ( 114b ), which with a centering element ( 22 . 22a . 22b ) of the at least one end plate ( 18 ) cooperates, and which on its inside a lid contour ( 114 ), to which a support structure ( 20 . 20a . 20b ) of the at least one end plate ( 18 ) can be applied and supported, - one on the housing ( 108 ) and / or lid ( 110 ) inlet ( 102 ) for supplying the medium to be filtered, in particular air, wherein on the housing ( 108 ) concentric with the longitudinal axis (L) an outlet ( 104 ) is provided for the discharge of the filtered medium, wherein the housing ( 108 ) in the area of the outlet ( 104 ) a sealing contour ( 116 ) provided with the radial seal ( 26 ) of the first end plate ( 16 ) of the filter element ( 10 ), wherein the filter element ( 10 ) replaceable in the housing ( 108 ) of the filter system ( 100 ) is arranged. Air filter system ( 100 ) according to claim 15, wherein in the region of the inlet ( 102 ) a cyclone separator ( 36 ) is provided and on the housing ( 108 ) or on the lid ( 110 ) a dirt outlet ( 106 ) is provided. Air filter system ( 100 ) according to claim 15 or 16, wherein inside ( 50 ) of the filter element ( 10 ) a separate from the filter element ( 10 ) replaceable secondary element ( 28 ) is arranged, which when changing the filter element ( 10 ) in the housing ( 108 ) can remain.

Images