DE102021200058A1 - Oil filter for a motor vehicle and motor vehicle with such an oil filter - Google Patents

Abstract

The invention relates to an oil filter (2) for a motor vehicle with a frame (4) which surrounds a cavity (6), with a filter element (8) fixed to the frame (4) and which encloses the cavity (6) at least along a circumferential direction, in particular as a whole, through which a fluid can flow in the flow direction from a fluid source to a fluid consumer (10) and through which foreign matter in the fluid can be caught as it flows through, with at least one base unit (12) which can be fixed to the frame (4). and which delimits the cavity (6) on an end face of the filter element (8), with at least one cover unit (14) which can be fixed to the frame (4), which delimits the cavity (6) on an end face remote from the base unit (12). of the filter element (8) and which comprises at least one coupling means (16) through which the cavity (6) is in fluid connection with the fluid consumer (10) or the fluid source, with at least one bypass means (18) which, when the filter element (8) is clogged with foreign substances, can be transferred from a closed functional position to an open functional position, in which a bypass fluid connection (20) can be established between the fluid source and the fluid consumer (10), and with at least one magnet element (22) which is or is arranged on the flow path of the bypass fluid connection (20) passing through the cavity (6). The invention also includes a motor vehicle with such an oil filter (2).

Description

The invention relates to an oil filter for a motor vehicle and a motor vehicle with such an oil filter.

It is known in motor vehicles to use an oil filter to clean oil that is to be supplied to a consumer in order to filter out foreign bodies and thereby increase the consumer's service life.

Due to the increasing deposits of foreign bodies in the filter elements of the oil filters, these can reach a state in which not enough oil can get through the filter elements to supply the consumer with sufficient oil. However, if the consumer is not supplied with sufficient oil, it can suffer damage. The possible damage to the consumer, which can result from an insufficient supply of oil, is greater than the possible damage to the consumer when unfiltered oil is supplied for a short time. Therefore, oil filters are known in which a bypass means is arranged in the oil filter. This bypass means opens automatically as soon as the filter element is clogged and allows the fluid to flow directly from the oil tank towards the consumer without being filtered.

An object of an exemplary embodiment of the invention is to propose an oil filter in which foreign bodies can be removed from the fluid, in particular the oil, even when the oil filter is in bypass mode.

This object is achieved by an oil filter for a motor vehicle with a frame, which surrounds a cavity, with a filter element fixed to the frame, which surrounds the cavity at least along a circumferential direction, in particular in its entirety, through which a fluid flows in the direction of flow from a fluid source to can flow through a fluid consumer and through which foreign matter in the fluid can be caught as it flows through, with at least one base unit that can be fixed to the frame and delimits the cavity on a front side of the filter element, with at least one cover unit that can be fixed to the frame, which cavity on a front side of the filter element facing away from the base unit and which comprises at least one coupling means, through which the cavity is in fluid connection with the fluid consumer or the fluid source, with at least one bypass means, which, when the filter element is clogged with foreign substances, from a closed functional position ng can be converted into an open functional position in which a bypass fluid connection can be produced between the fluid source and the fluid consumer, and with at least one magnetic element which is arranged in or on the flow path of the bypass fluid connection passing through the cavity.

Due to the fact that at least one magnetic element is provided in the oil filter, which is arranged in or on the flow path of the bypass fluid connection passing through the cavity, magnetically active foreign substances in the fluid, in particular metal chips, can be attracted by the magnetic element as it flows past the magnetic element and adhere to it . This makes it possible to clean the fluid at least slightly even in bypass operation of the oil filter, in particular to remove foreign matter from the fluid that could pose an increased risk of damage to the fluid consumer.

The fluid can be oil, for example. The fluid consumer can be an internal combustion engine, for example. The fluid source can be an oil tank of the motor vehicle, for example. The fluid can be operated in circulation, for example, with the fluid flowing from the fluid source to the fluid consumer and from there back to the fluid source.

The at least one magnetic element can be arranged anywhere within the oil filter. In one embodiment of the oil filter it is provided that at least one of the at least one magnetic element is arranged in or on the base unit.

If the at least one magnetic element is arranged in or on the base unit, flow effects of the bypass fluid flow can support the mode of operation of the magnetic element. If, for example, the bypass means is arranged in or on the cover unit, fluid can flow from the outside into the cavity of the oil filter and can first be deflected in the direction of the base unit. Shortly before reaching the base unit, the bypass fluid flow can be diverted again in the direction of the cover unit. By deflecting the flow of the fluid, heavy foreign matter moves towards the base unit due to inertia and centrifugal force.

In a further embodiment of the oil filter it is provided that at least one of the at least one magnetic element is arranged in or on the cover unit, in particular on the coupling means.

If the magnetic element is arranged in or on the cover unit, in particular on the coupling means, the foreign matter can escape from the fluid from an existing fluid path of the oil filter be drawn out. A particular advantage of this is that the magnetic element in such an arrangement removes magnetic foreign matter from the fluid not only in bypass operation of the oil filter, but also during normal operation of the oil filter.

In addition, it is provided in a further embodiment of the oil filter that at least one of the at least one magnetic element is arranged in or on the bypass means. In such a case, foreign matter can be filtered out as soon as the fluid enters the oil filter.

In a development of the last-mentioned embodiment, it proves to be advantageous if the bypass means comprises at least one valve having a valve disk and/or if at least one of the at least one magnetic element is arranged in or on the valve disk.

If the bypass means comprises at least one valve having a valve plate, the bypass means can be formed easily and inexpensively. In such a case, the valve of the bypass means opens automatically when such a pressure level is reached in the oil filter due to the clogged filter element that the valve of the bypass means opens. As a result, the oil filter can be designed in a technically simple and cost-effective manner. If the valve disk includes the magnetic element, in particular if the valve disk and magnetic element form a common one-piece component, the oil filter can have a reduced number of components and be of compact design.

In principle, the bypass means can be arranged at any point of the oil filter. It has proven to be advantageous if at least one of the at least one bypass means is arranged on or in the base unit and/or the cover unit.

This ensures that the oil filter has a maximum surface area of filter element available and that the bypass means is arranged at a point at which the fluid is not filtered during normal operation of the oil filter.

For servicing and replacing the oil filter, it has proven to be advantageous if it comprises at least one drain means, such as a drain plug, which can be arranged or is arranged in the base unit. In this way, fluid arranged in the cavity can be discharged via the discharge means in a simple manner.

In a further development of the last-mentioned embodiment, it proves to be advantageous if at least one of the at least one magnet element is arranged in or on the discharge means. In such a case, the magnetic element can be arranged in a technically simple component in the oil filter.

In principle, the magnetic element can be of any desired design. For example, it can comprise a current-carrying conductor. The oil filter can be implemented in a technically simple and cost-effective manner if the at least one magnetic element comprises a permanent magnet.

In principle, it is conceivable that only a single magnetic element is arranged in the oil filter. In the case of embodiments of the oil filter, a plurality of magnetic elements can be provided which can be arranged on the different components of the oil filter described above.

Finally, the object is achieved by a motor vehicle with a fluid source, with a fluid consumer and with at least one oil filter arranged between the fluid source and the fluid consumer, with at least one of the aforementioned features.

Further features, details and advantages of the invention result from the appended patent claims, from the drawing and the following description of two preferred embodiments of the oil filter.

• 1 Eine Schnittansicht eines ersten Ausführungsbeispiels eines Ölfilters;
• 2 Eine Schnittansicht eines zweiten Ausführungsbeispiels des Ölfilters.

In the drawing shows:

• 1 A sectional view of a first embodiment of an oil filter;
• 2 A sectional view of a second embodiment of the oil filter.

The figures show different exemplary embodiments of an oil filter for a motor vehicle, which is provided overall with the reference number 2 (not explicitly shown in the figures). The oil filter 2 includes a frame 4 surrounding a cavity 6 . Furthermore, the oil filter 2 comprises a filter element 8 which is fixed to the frame 4 and which completely surrounds the cavity 6 at least along a circumferential direction. A fluid can flow through the filter element 8 in the direction of flow from a fluid source to a fluid consumer 10 (only indicated in the figures). Furthermore, foreign matter in the fluid as it flows through can be caught by the filter element 8 .

The oil filter 2 also includes a base unit 12 which can be fixed to the frame 4 and which delimits the cavity 6 on an end face of the filter element 8 . Opposite the base unit 12, the oil filter 2 comprises a cover unit 14 which is fixed to the frame 4 and which has the cavity 6 on a side of the filter facing away from the base unit 12 lements 8 limited and comprising at least one coupling means 16, through which the cavity 6 is in fluid communication with the fluid consumer 10.

Furthermore, the embodiments of 1 and 2 in each case a bypass means 18 which, when the filter element 8 is clogged with foreign matter, is transferred from a closed functional position to an open functional position in which a bypass fluid connection 20 is established between the fluid source and the fluid consumer 10.

In order to filter out foreign matter from the fluid, the oil filter 2 includes a magnetic element 22 which is arranged in or on the flow path of the bypass fluid connection 20 passing through the cavity 6 .

In addition, both exemplary embodiments include embodiments in which the bypass means 18 is arranged in the cover unit 14 . In addition, the base units 12 of the two exemplary embodiments of the oil filter 2 each include a drain means 24, such as a drain plug.

1 shows a first exemplary embodiment of the oil filter 2. In this case, the magnetic element 22 is arranged on the drain means 24.

2 shows a second exemplary embodiment of the oil filter 2, in which the magnetic element 22 is arranged on the bypass means 18, in particular on a valve plate of a valve of the bypass means 18.

• Bei Erreichen einer bestimmten Zusetzung des Filterelements 8 mit Fremdstoffen, entsteht innerhalb des Ölfilters 2 ein Druckgefälle, das dazu führt, dass das Bypassmittel 18 von einer geschlossenen Funktionsstellung in eine geöffnete Funktionsstellung überführt wird. In dieser kann Fluid der Fluidquelle unmittelbar in den Hohlraum 6 des Ölfilters 2 einströmen, ohne das Filterelement 8 passieren zu müssen.

The mode of operation of the oil filter 2 is briefly described below:

• When a certain clogging of the filter element 8 with foreign matter is reached, a pressure drop occurs within the oil filter 2, which leads to the bypass means 18 being transferred from a closed functional position to an open functional position. In this fluid from the fluid source can flow directly into the cavity 6 of the oil filter 2 without having to pass through the filter element 8 .

When flowing through the cavity 6, the bypass fluid connection 20 passes the area of the base unit 12 and the cover unit 14. By arranging the magnetic element 22 in the base unit 12 and/or in the cover unit 14, magnetically active foreign substances, such as metal filings, can escape from the fluid are attracted by the magnetic elements 22.

The features of the invention disclosed in the above description, in the claims and in the drawing can be essential both individually and in any combination in the implementation of the invention in its various embodiments.

Reference List

2

oil filter

4

frame

6

cavity

8th

filter element

10

fluid consumer

12

ground unit

14

lid unit

16

couplant

18

bypass agent

20

bypass fluid connection

22

magnetic element

24

purgative

Claims (10)

Oil filter (2) for a motor vehicle with a frame (4) which surrounds a cavity (6), with a filter element (8) fixed to the frame (4) and which covers the cavity (6) at least along a circumferential direction, in particular in its entirety surrounds, through which a fluid can flow in the direction of flow from a fluid source to a fluid consumer (10) and through which foreign matter in the fluid can be caught as it flows through, with at least one base unit (12) which can be fixed to the frame (4) and which The cavity (6) is delimited on an end face of the filter element (8), with at least one cover unit (14) which can be fixed to the frame (4) and which closes the cavity (6) on an end face of the filter element (8 ) and which comprises at least one coupling means (16), through which the cavity (6) is in fluid connection with the fluid consumer (10) or the fluid source, with at least one bypass means (18) which, when the filter element (8) is contaminated with foreign substances e.g is set, can be transferred from a closed functional position to an open functional position, in which a bypass fluid connection (20) can be established between the fluid source and the fluid consumer (10), and having at least one magnetic element (22) which is located in or on the cavity (6 ) Passing flow path of the bypass fluid connection (20) is arranged. Oil filter (2) after claim 1 , characterized in that at least one of the at least one magnetic element (22) is arranged in or on the base unit (12). Oil filter (2) after claim 1 or 2 , characterized in that at least one of the at least one magnetic element (22) is arranged in or on the cover unit (14), in particular on the coupling means (16). Oil filter (2) according to at least one of the preceding claims, characterized in that at least one of the at least one magnetic element (22) is arranged in or on the bypass means (18). Oil filter (2) after claim 4 , characterized in that the bypass means (18) comprises at least one valve having a valve disk and/or that at least one of the at least one magnetic element (22) is arranged in or on the valve disk. Oil filter (2) according to at least one of the preceding claims, characterized in that at least one of the at least one bypass means (18) is arranged on or in the base unit (12) and/or the cover unit (14). Oil filter (2) according to at least one of the preceding claims, characterized by at least one drain means (24), such as a drain screw, which can be arranged or is arranged in the base unit (12). Oil filter (2) after claim 7 , characterized in that at least one of the at least one magnetic element (22) is arranged in or on the discharge means (24). Oil filter (2) according to at least one of the preceding claims, characterized in that the at least one magnetic element (22) comprises a permanent magnet. Motor vehicle with a fluid source, with a fluid consumer (10) and with at least one between fluid source and fluid consumer (10) arranged oil filter (2) according to one of Claims 1 until 9 .

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