DE102015009293B4 - Filter system and its use - Google Patents

Abstract

A filter system (100) for filtering a fluid comprising - a filter housing (108) having a lid (110) having an outlet (104) and at least one inlet, - at least one filter element (10) defining the outlet (104) of the Filter system separated from the at least one inlet with respect to a fluid flow, - wherein the outlet (104) with an opening (20) of an end plate (16) of the filter element (10) is tightly connected, - and wherein the filter element (10) in a on slidable closure element (22) for at least dust-tight sealing of the opening (20) arranged in a transport position (26) of the end plate (16) and directed into an inner region (54) of the filter element (10), 22) is displaceable by means of closing the lid (110) from the transport position (26) into an operating position (28), the opening (20) of the filter element (10) releasing the fluid is.

Description

Technical area

The invention relates to a filter system for filtering a fluid, in particular for use as an oil filter or fuel filter of an internal combustion engine, in particular of a motor vehicle.

State of the art

Filter systems that are transported open after manufacture, can be contaminated in the storage after production, during transport, during assembly in an internal combustion engine or a final assembly of vehicles, by dirt particles in the environment, which may then on the clean side of the Filter system and thus could get into the engine. Therefore, usually strict residual dirt requirements apply to filter systems that are mounted in the oil or fuel supply lines of internal combustion engines.

From the WO 2012/104221 A1 a filter system is known in which an element fluid passage is already sealed immediately after the production of the filter element with a sealing plug. In this way prevents the installation of the filter element in the filter housing any metal chips or plastic chips or other types of contamination from the filter housing can get into the interior of the filter element. It is not necessary to lavishly clean the housing parts, in particular the thread of the central cover passage, as is the case with changeover filters known from the prior art. The sealing plug can remain in the element fluid passage, in particular for storage and transport purposes, until the replaceable filter is to be mounted on the filter head. By using a sealing plug, it is also not necessary to completely shrink the replaceable filter for storage or transport purposes, in particular in foil, or to provide it with a cover which extends over the entire cover side of the replaceable filter, as in the case of interchangeable filters known from the prior art the case is to prevent dirt entry. In the replaceable filter according to the invention, only the central element fluid passage is closed by the lid fluid passage with the sealing plug. To install the replaceable filter on the filter head of the plug is pulled out through the central lid fluid passage, so that access to the interior of the filter element is released. The replaceable filter can then be plugged onto the connecting piece. The cover fluid passage has an internal thread and the connecting piece has an external thread, so that the replaceable filter can be screwed onto the connecting piece in a simple and releasable manner.

Out US Pat. No. 6,391,193 B1 For example, an oil filter element is known that has a housing in which two filter elements, a coarse filter and a fine filter, are arranged. On a side facing away from a connecting piece, a relief valve is arranged within the housing, which is to ensure an oil supply to the connected motor (with unfiltered oil) in case of pollution-induced increase in pressure within the filter element.

Further, in WO 2010/117799 A2 a liquid filter described with at least one end-side end plate, wherein the opening of an end plate is closed by a bypass valve, which can be converted by moving in the axial direction of the filter element in an operating position.

In addition, the concerns WO 2012/104221 A1 an exchangeable filter and a filter head, wherein on the replaceable filter, a sealing plug is provided, which can be removed through a central fluid passage before assembly.

Finally, in US 300 050 A discloses a filter unit comprising a cylindrical fabric filter and within which a metal filter arranged concentrically therewith. The flow through the metal filter is opened via a spring-loaded bypass valve as soon as the fabric filter is clogged.

Disclosure of the invention

An object of the invention is therefore to provide a filter system for use of a filter element, which allows a simple and inexpensive way to protect against contamination of an interior of the filter element, in particular the clean side, during transport, storage, installation.

The object is achieved by a filter system for filtering a fluid having the features of independent claim 1.

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

The filter system includes a filter housing having a lid having an outlet and at least one inlet. Furthermore, the filter system comprises at least one filter element which separates the outlet of the filter system from the at least one inlet with respect to a fluid flow, wherein the outlet with an opening of a Endelement of the filter element is tightly connected, and wherein the filter element has a arranged in the end plate and directed into an inner region of the filter element guide device slidable closure element for at least dust-tight closing of the opening in a transport position. In this case, the closure element is displaceable by closing the lid from the transport position to an operating position, wherein the opening of the filter element is released for the outflow of the fluid.

In the filter system according to the invention it is ensured that the clean side of the filter element is protected during transport and storage in any case from possible contamination by the closed closure element in the transport position. Only when mounting the filter element in the filter housing of the filter system, the closure element is brought by an attached on the cover ejection element or valve in an operating position upon closure of the lid of the filter system, wherein the opening of the filter element in the end plate with the outlet of the filter system, so for example with a Valve of the filter system is tightly closed. As a result, no dirt particles can reach the clean side of the filter element. Further, the closure element is arranged in a guide device of the filter element, so that it can be automatically brought into an operating position upon closure of the lid of the filter system, which ensures that the filter element in the installed state in any case is also ready for operation. Also, the closure element can not be lost or get to positions where it could cause malfunction.

Advantageously, the closure element in the transport position can thus close the opening of the filter element tightly. In this way, it is ensured that in automotive technology usually required residual dirt requirements can be met easily, so that the quality of the filtered fluid can also be met as required. In particular, the clean side is usually subject to very demanding residual dirt requirements, since the filtered fluid, such as fuel or oil is directed into an injection system or similar sensitive components of an internal combustion engine, where dirt particles could lead to failure of the system. The closure element may, for example, remain in an operating position in an inner region of the filter element for the closure element in a guide device arranged at the opening of the end plate between the end plate and a central tube. The filter element can be handled in the transport position of the closure element, in which the opening in the end plate is dust-tight, under normal conditions during transport and storage, for example, during maintenance in the field.

Advantageously, the closure element in a transport position can seal the inner region of the filter element in a transport position and release the opening in an operating position. The closure element thereby ensures that dirt particles, for example, during transport and storage even under non-clean room conditions, can not reach the clean side of the filter element and the opening of the clean side is released only after installation in a filter system and connection to an internal combustion engine, where they It is also tightly sealed again by an outlet or a valve. In the operating position, the outlet of the filter element is sealed, especially because no fluid should reach the outside of the filter system.

It is advantageous if, by means of an ejection element arranged on the cover, when the cover is closed, the closure element can be displaced into the operating position, wherein in particular a valve arranged on the cover is designed as an ejection element. In this way, the closure element can automatically be brought into the operating position when closing the lid and the filter element can not accidentally remain closed with the closure element and thus possibly cause malfunction of the internal combustion engine. In particular, it is advantageous if the closure element can be moved with a valve in the operating position. Thus, the clean side of the filter element via the valve can be tightly connected to the outlet.

After installation of the filter element, for example when replacing the filter element for maintenance, it is ensured that the clean side is automatically opened by the ejection element or a valve in the lid of a filter system, and re-connected to an outlet of the filter system. In this way, it is also excluded that a plug used in other applications, for example, due to carelessness remains on the filter element and can lead to malfunction.

As a result, it can not be forgotten during assembly of the filter element to remove the closure element, which can lead to a malfunction during operation of an internal combustion engine. Further, the period of time in which the opening of the filter element is exposed unprotected and possible dirt particles can reach the clean side of the filter element, can be minimized in this way.

Furthermore, it is expedient if the guide device in the interior of the Protrudes filter element. In such an embodiment, the outer space of the filter element for installation in a filter system remains unaffected by the geometry of the guide means and can continue to be used favorably, while the inner region can accommodate the guide device space favorable.

In an advantageous embodiment, the closure element can remain in the operating position in the guide. In this way, the position of the closure element after releasing the opening in the end plate of the filter element is controllable. The closure member can not move freely within the interior of the filter element, and it can not get into places where it could possibly cause malfunction of the engine, for example, by obstructing the flow of filtered fluid. In addition, in this way, the risk that dirt particles can reach the clean side of the filter element, minimized, since the opening in the end plate is open only for the shortest possible time ever for the outside world and can be closed again immediately.

In addition, the filter element may have a filter bellows, which encloses the inner region, and which separates a clean side of the filter element from a raw side (52).

Another advantage is that the closure element can remain captive in the guide device. Thus, the closure element can not get by mistake in areas of an internal combustion engine, where it could cause damage. In addition, it can not be deducted by mistake and leave the opening in the end plate unprotected in the open state.

It is expedient if the closure element is rotationally symmetrical. Usually have connection elements such as valves or exhaust ports on filter systems and internal combustion engines round nozzle. Also, the assembly of the closure element in the manufacture of the filter element is cheaper because it does not have to be paid attention to a precise angular positioning of the closure element in the opening of the end plate.

In an advantageous embodiment, the filter system described can be used as an oil filter or fuel filter, in particular as an oil filter or fuel filter of an internal combustion engine.

list of figures

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.

• 1 einen Längsschnitt eines Filterelements mit einem Verschlusselement in Transportposition;
• 2 einen Längsschnitt eines Filterelements mit einem Verschlusselement in Betriebsposition; und
• 3 einen Längsschnitt eines erfindungsgemäßen Filtersystems mit abgehobenem Deckel nach einem Ausführungsbeispiel der Erfindung.

They show by way of example:

• 1 a longitudinal section of a filter element with a closure element in transport position;
• 2 a longitudinal section of a filter element with a closure element in the operating position; and
• 3 a longitudinal section of a filter system according to the invention with the lid lifted off according to an embodiment of the invention.

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 longitudinal section of a filter element 10 for use in the filter system according to the invention with a closure element 22 in transport position 26 in which the closure element 22 the filter element 10 after production under defined purity conditions concludes. The closure element 22 closes the opening 20 in the end disk 16 of the filter element 10 dustproof. To the filter element 10 to be able to use, must be the closure element 22 be brought into an operating position.

The filter element 10 for filtering a fluid comprises a filter bellows 12 that has an interior area 54 encloses, and which a clean side 50 of the filter element from a raw side 52 separates, one at a front side 15 the filter bellows 12 arranged end plate 16 , where the end disc 16 an opening corresponding to the interior area 20 has, as well as a closure element 22 for at least dust-tight sealing of the opening 20 , Here is the closure element 22 in one at the opening 20 the end plate 16 arranged guide device 24 in a longitudinal axis L in the interior 54 of the filter element 10 slidably arranged. The closure element 20 closes in a transport position 26 the interior 54 of the filter element 10 tight and gives in an operating position 28 the opening 20 free, so that the filtered fluid can drain. The closure element 22 remains in the operating position 28 in the leadership facility 24 , And there is arranged in particular captive. The management device 24 protrudes into the interior 54 into it, so that the outer contour of the filter element remains unaffected. The closure element 22 is favorably rotationally symmetrical, which during assembly of the closure element 22 is beneficial, since so not on a correct angle positioning in the opening 20 must be respected.

The closure element 22 is designed to be with an ejection element 114 to cooperate, the closure element 22 when inserting the filter element 10 in a filter housing 108 automatically in its operating position 28 brings.

The filter bellows 12 rests in the direction of the interior 54 on a central tube 38 having openings for passage of the fluid. The center tube 38 Can be made in one piece with the end plate 16 be educated. The end disc 16 forms the first front side 15 of the filter element 10 and covers the filter bellows 12 frontally.

In 2 on the other hand is a longitudinal section of a filter element 10 for use in the filter system according to the invention with a closure element 22 in its operating position 28 shown. Here is the closure element 22 in the leadership facility 24 down to the interior 54 who is the clean side 50 of the filter element 10 includes, pushed. This is the opening 20 for discharging the filtered fluid from the clean side 50 Approved. The closure element 22 remains in the operating position 28 in the leadership facility 24 and thus can not uncontrollably affect the flow of the filtered fluid, or even clog the outlet. This is the closure element 22 captive in the guide device 24 held.

3 shows a longitudinal section of a filter system 100 with lifted lid 110 according to an embodiment of the invention. The filter system 100 for filtering a fluid which can be used as an oil filter or fuel filter, in particular as an oil filter or fuel filter of an internal combustion engine, comprises a filter housing 108 with a lid 110 which is an outlet 104 and at least one - not shown - inlet has. Furthermore, the filter system comprises a filter element 10 , which with attached lid 110 the outlet 104 the filter system separates from the at least one inlet with respect to a fluid flow, wherein the outlet 104 with an opening 20 an end plate 16 of the filter element 10 is tightly connected, and wherein the filter element 10 one in one at the end disc 16 arranged and in an interior area 54 of the filter element 10 directed management facility 24 sliding closure element 22 for at least dust-tight sealing of the opening 20 in a transport position 26 having. The closure element 22 is by closing the lid 110 from the transport position 26 in an operating position 28 displaceable, wherein in the operating position, the opening 20 of the filter element 10 is released to the outflow of the fluid.

The closure element 22 closes in the transport position 26 the opening 20 of the filter element 10 in the leadership facility 24 about the seals 23 tight. By means of one on the lid 110 arranged ejection element 114 can when closing the lid 110 the closure element 22 in the operating position 28 be moved, in particular one on the lid 110 arranged valve 112 as ejection element 114 is trained. The closure element 22 remains in the operating position 28 in the lead 24 , At the in 3 shown ejection element 114 in the form of a valve 112 is to release the opening 20 the end plate 16 of the filter element 16 the lid 110 with the valve arranged thereon 112 on the end disc 16 lowered. The sleeve encloses 118 the closure element 22 and sits close to the end disk 16 on. Then press on further lowering the lid 110 on the end disc 16 the sleeve 118 the compression spring 120 of the valve 112 together, the valve stem 116 slides into the leadership device 24 and thereby pushes the closure element 22 in the leadership facility 24 in the interior 54 of the filter element 10 into it. The valve stem 116 seals the filter element 10 in the leadership facility 24 over the valve stem 116 attached seals 122 from. With completely lowered lid 110 is the filter housing 108 tightly closed. The closure element 22 remains in the guide device 24 internally 54 of the filter element 10 ,

Claims (7)

A filter system (100) for filtering a fluid, comprising a filter housing (108) having a lid (110) having an outlet (104) and at least one inlet, at least one filter element (10) separating the outlet (104) of the filter system from the at least one inlet for fluid flow, - wherein the outlet (104) is sealed to an opening (20) of an end plate (16) of the filter element (10), - And wherein the filter element (10) arranged in a at the end plate (16) and in an inner region (54) of the filter element (10) directed guide means (24) slidable closure element (22) for at least dust-tight closing of the opening (20) in a transport position (26), - Wherein the closure element (22) by means of closing the lid (110) from the transport position (26) into an operating position (28) is displaceable, wherein the opening (20) of the filter element (10) is released for the outflow of the fluid. Filter system after Claim 1 , wherein by means of an ejection element (114) arranged on the cover (110), the closure element (22) is displaceable into the operating position (28) when closing the lid (110), in particular a valve (112) arranged on the lid (110) Ejection element (114) is formed. Filter system after Claim 1 or 2 , wherein the closure element (22) remains in the operating position (28) in the guide (24). Filter system according to at least one of Claims 1 to 3 , characterized in that the filter element (10) has a filter bellows (12) which encloses the inner region (54) and which separates a clean side (50) of the filter element (10) from a raw side (52). Filter system according to at least one of the preceding claims, wherein the closure element (22) remains captive in the guide means (24). Filter system according to at least one of the preceding claims, wherein the closure element (22) is rotationally symmetrical. Use of the filter system (100) according to any one of the preceding claims as an oil filter or fuel filter.

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