DE102014006703B4 - Filter element-additive module of a filter and filter - Google Patents

Abstract

Filter element-additive module (10) of a filter for fluid, in particular oil, fuel, water, urea water solution or air, in particular an internal combustion engine, in particular of a motor vehicle, with at least one filter element (12), the at least one filter medium (16) for filtering the Fluid and at least one additive dispenser for at least one additive for the fluid, wherein the at least one additive dispenser at least one additive container (14) for providing the at least one additive, the at least one additive container (14) at least partially outside the at least a filter element (12) arranged and by means of at least one at least positive and / or non-positive element container connection (15) on the at least one filter element (12) is fixed, wherein the filter element (12) at one of the additive container (14) facing the end an annular connection-side end plate (26), which is adhesively bonded to the filter medium (16), wherein the filter element (12) is a hollow filter element, in particular a round filter element, characterized in that the element-container connection (15) has a snap connection or latching connection (42, 44, 68, 70), wherein the connection-side end plate (26) is formed on its radially inner peripheral side as an element-side connecting piece (30) which extends coaxially into an element interior (22) and its edge facing away from the end plate (26) has a latching receptacle (42). for latching hooks (44) of a container-side connecting piece (40).

Description

Technical area

The invention relates to a filter element-additive module of a filter for fluid, in particular oil, fuel, water, urea water solution or air, in particular an internal combustion engine, in particular of a motor vehicle, with at least one filter element having at least one filter medium for filtering the fluid, and at least an additive dispenser for at least one additive for the fluid.

Furthermore, the invention relates to a filter with at least one filter element-additive module.

State of the art

From the DE 10 2004 001 983 A1 a device for filtering liquid fluids is known. The device comprises a housing, a fluid inlet arranged in the housing and a fluid outlet arranged in the housing. There are means for removing particles from the fluid stream between the fluid inlet and the fluid outlet. In the device, at least one additive for the functional change of the fluid properties is arranged. The additive is arranged and shaped in a colloidally disperse, dimensionally stable, elastic form in the internal volume of the device corresponding to at least one geometric specification by the internal structure of the device and the means for removing the particles.

US 2005/0 194 301 A1 discloses a liquid filter with an additive container for storing and dispensing an additive to the liquid to be filtered, which is arranged upstream of a filter element.

WO 2005/070 528 A1 discloses an additive distribution system which has a container for a liquid additive gel. The container has one or more openings through which one or more components of the gel are delivered to a circulating liquid.

The invention has for its object to design a filter element-additive module and a filter of the type mentioned, in which different additives, including flowable, in particular liquid or powdery or granular additives, simply kept and brought into contact with the fluid can.

Disclosure of the invention

This object is achieved in that the at least one additive dispensing device has at least one additive container for providing the at least one additive, the at least one additive container at least partially disposed outside the at least one filter element and by means of at least one at least positive and / or non-positive element container Connection is attached to the at least one filter element, wherein the element-container connection has a latching or snap connection.

According to the invention, the at least one additive is held in at least one additive container. The at least one additive container can be filled before or after assembly with the at least one filter element with the at least one additive. The at least one additive can be reliably held in the at least one additive container. It can be dispensed as needed to the fluid.

With the at least one additive container also not dimensionally stable, in particular flowable, preferably liquid or powder or granular additives can be used in the filter element-additive module. Flowable additives can more easily mix with the fluid and / or physically and / or chemically react with it. Additionally or alternatively, at least one dimensionally stable additive can be provided with the at least one additive container.

The at least one additive container can advantageously have at least one discharge opening, which can fluidly connect an additive space for the additive with a fluid-carrying space of a filter housing of the filter. In this way, the at least one additive can come into contact with the fluid. The at least one additive can easily dissolve in the fluid and / or react with it. By appropriate specification, in particular size and / or position of the at least one dispensing opening and / or distribution of a plurality of dispensing openings, a dispensing characteristic, in particular a dispensing speed, of the at least one additive can be predetermined, in particular selectively influenced.

Additives may be known to be active ingredients added to the fluid to be treated for the purpose of improving certain properties. The active ingredients may alter the physical and / or chemical properties of the fluid.

The at least one additive that may be disposed in the at least one additive container may be liquid or solid. Advantageously, the at least one additive can be degraded during use, in particular chemically. With the at least one additive, the Obtained properties of the fluid over the service life and / or the properties changed, in particular for the appropriate use to improve.

The at least one additive can be used to alter the fluid so that it acts less aggressively on other materials of the filter, in particular the filter element-additive module, preferably the filter medium. In this way, by the addition of at least one additive, fluids which otherwise have an aggressive effect on the materials of the filter can also be treated with the filter element / additive module. The service life, in particular of the at least one filter element, can be lengthened accordingly if the fluid is treated with at least one additive. The object of the additive may be, in particular, to prevent premature aging of the oil in a motor oil circuit.

Additives are usually supplied in relatively small amounts to the fluid to be treated.

The at least positive and / or non-positive element container connection can be easily closed. Such an element-container connection can advantageously be designed so that it is detachable again. In this way, the at least one additive container can be separated from the at least one filter element, in particular for maintenance purposes. During maintenance, the at least one additive container can be exchanged or filled with additive. The at least one additive container can also be reused. Additionally or alternatively, the at least one filter element can be exchanged.

In addition to the at least positive and / or non-positive element-container connection, the at least one additive container can also be connected in a different manner, in particular materially, preferably by means of gluing, welding or soldering, with the at least one filter element. Such material connections can not usually be separated without destruction.

The at least one additive container is arranged according to the invention at least partially outside the at least one filter element. In this way, freedom of design with regard to the shape and / or size of the at least one additive container can be increased. The at least one additive container can be better flowed, flowed around and / or flowed through by fluid outside the at least one filter element. When using a hollow filter element, a part of the at least one additive container can be arranged to save space in an element interior. According to the invention, in particular in connection with a hollow filter element, a receiving volume and / or a surface of the at least one additive container which can be flowed through by the fluid can be larger than would be possible with an arrangement exclusively within the hollow filter element.

Advantageously, the at least one additive container can be realized in one piece. In this way, an assembly effort when assembling the filter element-additive module can be reduced.

Advantageously, the at least one additive container can be produced at least partially by a casting process, in particular an injection molding process.

Advantageously, the at least one additive container can be made of plastic, metal or another type of material or material mix. Plastic can be easily poured, especially injection molded. Plastic can easily be used to realize even complex shapes. The at least one additive container can be made of plastic with elastic properties. In this way, a tolerance compensation can be effected.

The at least one filter medium can be traversed by the fluid for filtering. The filter medium can be a filter paper, a nonwoven, a meltblown, a foamed filter medium or another type of filter medium suitable for filtering the corresponding fluid or a composition of different filter media. The at least one filter medium may be formed into a filter bellows. It can be folded or unfolded. An inflow side of the filter medium forms a crude fluid side, on which the fluid to be cleaned can enter. An outflow side of the filter medium forms a clean fluid side, at which the purified fluid can escape.

The filter element-additive module can be used in a filter for liquid or gas, in particular oil, fuel, water, urea water solution or air. The filter element-additive module can be used in particular for the purification and treatment of engine oil of an engine oil circuit of an internal combustion engine. However, the invention is not limited to an internal combustion engine of a motor vehicle. Rather, it can also be used outside of an internal combustion engine, in particular in a motor vehicle. In particular, it can also be used for the purification and treatment of gear oil or hydraulic oil or other equipment. The invention can also be used outside the automotive industry, especially in industrial engines, find use. The invention can also be used in commercial vehicles, construction machines or agricultural machines.

The filter element-additive module may also have a plurality of filter elements and / or a plurality of additive containers.

In an advantageous embodiment, the at least one filter element may be a hollow filter element, in particular a round filter element.

A hollow filter element is characterized in that it has at least one element interior. The at least one element interior may be circumferentially surrounded by the at least one filter medium with respect to an element axis. In contrast to a so-called flat filter element, the filter medium is circumferentially closed with respect to the element interior in the hollow filter element. For filtration, the fluid can flow through the filter medium with respect to the element axis from radially outside to radially inside or vice versa. The filter element may have at least one passage, which may be connected to the element interior. Through the at least one passage fluid can get into the element interior or out of this. The filter medium may in particular be zigzag folded or unfolded.

The at least one filter element can advantageously have a round, oval, angular or other cross-section. The at least one filter element may advantageously be cylindrical, conical or otherwise shaped with respect to the element axis. Advantageously, the at least one filter element may be a so-called round filter element, an oval round filter element, a conical round filter element or a conical-oval round filter element.

In a further advantageous embodiment, the at least one filter element and the at least one additive container can be arranged axially one behind the other with respect to an axis of the filter element-additive module.

In this way, the at least one filter element and the at least one additive container can be arranged to save space axially, in particular coaxially. When using a hollow filter element, in particular a round filter element, the at least one additive container can advantageously be fastened to an end face of the at least one filter element.

Advantageously, an element axis of the at least one filter element and / or a container axis of the at least one additive container can extend coaxially or parallel to an axis of the filter element-additive module or form it. Advantageously, the element axis of the at least one filter element and / or the container axis of the at least one additive container and / or the axis of the filter element-additive module may extend parallel or coaxial with an installation axis of the filter element-additive module into a filter housing of the filter. In this way, the filter element-additive module can simply be inserted axially into the filter housing.

The filter element has at least one end body with respect to an axis of the filter element-additive module, in particular an element axis, front and / or rear end face.

With the at least one end body, the at least one filter element can be stabilized. The shape in particular of a folded filter medium can be predetermined and / or held with the at least one end body.

The at least one end body has connection elements. The connecting elements can be used for connecting in particular corresponding passages of the at least one filter element with corresponding connecting elements, in particular connecting pieces, of the filter housing of the filter and / or of the additive container. The connection elements can also serve to connect the at least one filter element to a possible filter head of the filter.

Advantageously, at least one end body may have at least one opening to the element interior of a filter element designed as a hollow filter element.

The end body is an end plate. An end plate can be arranged to save space on an end face of the filter element, in particular of the filter medium. Disc-like end bodies may have a relatively small extent, in particular thickness, in the direction of the axis of the filter element-additive module, in particular the element axis.

The at least one end body is glued to the at least one filter medium.

Advantageously, the at least one end body can be made of plastic and / or metal.

Advantageously, the at least one end body can have at least one receptacle for a possible seal, in particular an O-ring seal. Advantageously, the at least one end body at least one receptacle for a any seal, in particular a molded seal, have. Advantageously, the at least one end body may comprise at least one mounting collar or receiving collar for corresponding element-container connections.

Advantageously, the at least one additive container may be attached to the at least one end body of the at least one filter element. In this way, mechanical forces can be transmitted evenly between the at least one additive container and the at least one filter element.

Advantageously, the at least one filter element at least one support body, in particular a support tube having. On the at least one support body, the filter medium, in particular during flow through the fluid, supported. The at least one support body can advantageously be arranged in the element interior of a filter element designed as a hollow filter element. The at least one support body can advantageously extend coaxially or parallel to the element axis of the at least one filter element.

Advantageously, the at least one support body may extend between two end bodies of the at least one filter element, which are arranged on opposite sides of the filter element. The at least one support body may advantageously be connected to at least one end body of the at least one filter element. In this way, the at least one filter element can be stabilized even better. In particular, mechanical forces which are transmitted by means of the element-container connection from the additive container to the filter element can thus be better compensated. Advantageously, the at least one support body can be connected to both end bodies. Thus, the stability of the at least one filter element can be further increased.

A snap connection or locking connection can be easily closed. Snap connections and snap connections can also be designed so that they can be solved non-destructively again. In this way, the element-container connection can be reused. Thus, the ease of maintenance of the filter element-additive module can be improved.

The snap connection or latching connection can advantageously have at least one latching element, in particular a latching hook. The at least one latching element can be arranged on the at least one additive container or the at least one filter element. It can also be arranged on the at least one additive container and the at least one filter element in each case at least one latching element. The at least one latching element can advantageously cooperate with a corresponding latching receptacle on the corresponding other component. Thus, a stable, positive element-container connection can be realized.

Advantageously, the at least one latching element can latch on the side of the at least one filter element. In this way, only a corresponding locking receptacle is required on the part of the at least one filter element. Such a locking receptacle can be designed simpler and be realized as the corresponding locking element. The at least one latching element can advantageously be fixed, directly or indirectly, to which at least one additive container is connected.

Advantageously, the at least one latching element can latch in the element interior of the possibly at least one hollow filter element. In this way, the at least one locking element can be protected and arranged to save space.

The at least one latching element can advantageously be integrally connected to the at least one additive container. Alternatively or additionally, the at least one additive container may have at least one connecting body, which may comprise the at least one latching element.

The at least one connecting body can advantageously have or be realized as such a cover element of the at least one additive container. With the at least one cover element, a filling opening of an additive space for the additive of the at least one additive container can be closed. The at least one cover element can advantageously be connected to a container pot of the at least one additive container by means of a material-fit and / or positive and / or non-positive lid connection device. The cover connection device can advantageously have at least one connection latching element, in particular a connection latch hook, and / or at least one latching receptacle. Accordingly, the container pot may have at least one connecting detent element and / or at least one detent receptacle. The lid connection means may be part of or separate from the additive container connection.

Alternatively, advantageously at least one end body of the filter element for closing the at least one filling opening of the at least one additive container can be configured. In this case, the additive container connection can also act as a lid connection device.

Advantageously, the at least one additive container, in particular a container pot, can be of annular construction. It may advantageously have a radially inner peripheral wall and a radially outer peripheral wall, between which there is an annular additive space for receiving the at least one additive. The peripheral walls of the annular additive container can be closed on at least one end face, in particular by means of a bottom section. A radially inner container interior, which is surrounded by the radially inner peripheral wall, can serve as a fluid channel for the filter element-additive module. The container interior can advantageously optionally correspond with the element interior of the at least one hollow filter element.

The at least one additive container can advantageously have at least one container connection element, in particular a connection seal unit, for a corresponding filter connection element, in particular a connection piece, a filter housing of the filter or a filter head. The at least one container connection element can establish a fluid connection between the container interior and the filter connection element. Advantageously, the container connection element may have at least one seal, in particular an O-ring seal. The container interior are sealed by means of the at least one seal to the outside.

In a further advantageous embodiment, the at least one additive container can be arranged on the raw fluid side with respect to the at least one filter element.

In this way, the fluid may combine with the additive before it reaches the filter medium. Thus, the properties of the fluid can be changed with the additive upstream of the filter medium. The fluid may be altered with the additive in a manner that less stresses the filter medium. Thus, the service life of the filter medium can be extended using the additive.

Additionally or alternatively, at least one additive container can be arranged on the clean fluid side of the at least one filter element. In this way, the at least one additive can fluidically come into contact with the cleaned fluid only behind the filter medium. In this way it can be prevented that the additive can interact with or filter out through the filter medium before it can interact with the fluid.

In a further advantageous embodiment, at least one additive container can be arranged on one connection side and / or opposite the connection side of the filter element-additive module.

On the connection side of the filter element-additive module is the connection to a corresponding filter connection element, in particular a connecting piece, the filter housing or a filter head. On the connection side, the at least one additive container can be particularly well, in particular unhindered, flowing against, flowing around and / or flowing through fluid.

Additionally or alternatively, at least one additive container may be arranged on the side of the filter element-additive module opposite the connection side. In this way, the filter element-additive module can be constructed simpler. In particular, it is not necessary to provide the at least one additive container to the corresponding filter connection element with a container connection element. On corresponding connecting elements and / or sealing elements can be dispensed with.

In a further advantageous embodiment, at least one seal, in particular an O-ring seal, can be arranged between the at least one filter element and the at least one additive container.

In a further advantageous embodiment, at least one seal, in particular a molded seal, can be arranged between the at least one filter element and the at least one additive container.

Advantageously, the at least one seal can be arranged between an element interior of the filter element and a container interior of the at least one additive container. Thus, the at least one seal can seal the connection area between the element interior and the container interior to the outside.

The container interior and the element interior can advantageously be flowed through on the clean fluid side. By means of the at least one seal, the clean fluid side in the region of the connection between the at least one additive container and the at least one filter element can be sealed to the outside, in particular to the raw fluid side.

In a further advantageous embodiment, the filter element-additive module can be used in a non-destructively disclosed replaceable filter or an openable filter, in particular interchangeable.

Advantageously, the at least one filter-additive module can be arranged in a so-called replaceable filter. In the replaceable filter, the filter housing is not non-destructive obvious. For maintenance purposes, the entire replaceable filter including the filter housing and the entire filter element additive module must be replaced. The replaceable filter is attached to a filter head, which has corresponding connections for fluid inlet and fluid outlet. The filter head can be firmly attached to a frame, in particular an internal combustion engine. The filter head may in particular be part of a motor oil circuit.

Alternatively, the at least one filter element additive module can be arranged in an openable filter housing. The at least one filter element-additive module can be easily removed or replaced for maintenance purposes. So it is possible that only the components are replaced, which must be replaced. All other components, in particular the filter housing, can be reused.

The object is further achieved in the filter according to the invention by the filter element-additive module according to the invention.

The advantages and features identified above in connection with the filter element additive module according to the invention and its advantageous embodiments apply correspondingly and vice versa for the filter according to the invention and its advantageous embodiments.

list of figures

• 1 einen Längsschnitt eines Filterelement-Additiv-Moduls für Motoröl einer Brennkraftmaschine eines Kraftfahrzeugs gemäß einem ersten Ausführungsbeispiel;
• 2 einen Längsschnitt eines Filterelement-Additiv-Moduls gemäß eines zweiten Ausführungsbeispiels.

Further advantages, features and details of the invention will become apparent from the following description, are explained in more detail in the embodiments of the invention with reference to the drawing. The person skilled in the art will expediently also individually consider the features disclosed in the drawing, the description and the claims in combination and combine these into meaningful further combinations. It show schematically

• 1 a longitudinal section of a filter element-additive module for engine oil of an internal combustion engine of a motor vehicle according to a first embodiment;
• 2 a longitudinal section of a filter element-additive module according to a second embodiment.

In the figures, the same components are provided with the same reference numerals.

Embodiment (s) of the invention

In the 1 is a filter element additive module 10 according to a first embodiment of an otherwise not shown filter for engine oil in a longitudinal section. The filter is in one in the 1 not shown engine oil circuit of an internal combustion engine of a motor vehicle. The filter is used to clean the engine oil and add an additive. The additive used causes in the described embodiment that an aging of the engine oil is delayed.

The filter element additive module 10 includes a round filter element 12 and an additive dispenser with an additive container 14 , The round filter element 12 and the additive container 14 are built as a module, that is, they can be preassembled together and in a corresponding, in the 1 not shown, filter housing of the filter can be installed. The round filter element 12 and the additive container 14 are by means of a positive-acting element-container connection 15 connected with each other.

The round filter element 12 includes a filter medium 16 , For example, a filter fabric, which zigzag folded and with respect to an axis 18 circumferentially closed to a filter bellows 20 is shaped.

In the embodiment shown, the axis runs 18 coaxial with an element axis of the round filter element 12 and to a container axis of the additive container 14 , It can therefore also be called a "module axis". In the following, if "axial", "coaxial", "radial", "circumferential" or the like is mentioned, this refers to the axis, unless stated otherwise 18 ,

The filter bellows 20 surrounds radially outside a element interior 22 of the round filter element 12 , At one of the additive container 14 facing away from the bottom end face is a bottom end plate 24 to the filter medium 16 glued. With the bottom end plate 24 is the front of the filter medium 16 tightly closed. The bottom end plate 24 has the shape of an annular disc, which has an opening to the element interior 22 having.

For the invention, the orientation of the filter element-additive module 10 not necessarily essential. Therefore, if "bottom side" is mentioned, this essentially serves the simpler explanation of the illustrated embodiment. Under operating conditions, the filter element-additive module 10 also be arranged obliquely to the horizontal. The bottom end plate 24 can also be located upstairs.

According to the invention, the filter element on the additive container 14 facing connection-side end face an annular connection-side end plate 26 on that tight with the filter medium 16 is glued. The end discs 24 and 26 are each advantageously made of plastic.

Between the end discs 24 and 26 extends in the element interior 22 a coaxial support tube 28 , The support tube 28 is advantageously made of plastic. The support tube 28 is with its ends each with the corresponding end plate 24 and 26 stable connected. The support tube 28 is open at its ends. Its peripheral wall has a plurality of openings, so that the support tube 28 circumferentially permeable to engine oil. Fold edges of the filter medium 16 on the radially inner peripheral side of the filter bellows 20 may be on the radially outer peripheral side of the support tube 28 support.

On its radially inner peripheral side is the connection-side end plate 26 to an element-side connecting piece 30 educated. The element-side connecting piece 30 Coaxially extends into the element interior 22 ,

The element-side connecting piece 30 is graded twice at right angles in the axial direction. The radially adjacent sections between the steps alternately extend circumferentially radially and circumferentially axially.

The first stage, viewed radially from the outside, forms a seal receiver 32 for a coaxial O-ring seal 34 , The O-ring seal 34 lies with its radially outer peripheral side and its end plate 26 facing side each circumferentially connected tightly to the seal receptacle 32 at.

The second stage, viewed radially from the outside, forms a support section 36 for a corresponding mating support section 38 a container-side connection piece 40 ,

One of the end disc 26 facing edge of the element-side connecting piece 30 forms a snap-in receptacle 42 for snap hooks 44 of the container-side connecting piece 40 , The snap-in receptacle 42 and the locking hooks 44 are parts of the element container connection 15 ,

The additive container 14 is constructed coaxially. He has a container pot 46 on with a radially outer peripheral wall 48 and a radially inner peripheral wall 50 , The radially outer peripheral wall 48 and the radially inner peripheral wall 50 are at the the round filter element 12 axially facing end side in one piece via an annular end wall portion 52 connected. The container pot 46 is made in one piece by injection molding of plastic.

On the round filter element 12 axially facing outside is on the end wall portion 52 a coaxial connection sealing unit of no further interest here 54 arranged.

The radially inner peripheral wall 50 surrounds a coaxial container interior 56 , which in each case has an opening at both axial end faces. Through the perimeter walls 48 and 50 and the end wall portion 52 becomes an additive room 58 with limited. The additive room 58 serves to accommodate the additive, which in the 1 for the sake of clarity is not shown.

The radially outer peripheral wall 48 and the end wall section 52 each have a plurality of discharge openings 60 on, over which the additive space 58 is in fluid communication with a surrounding oil-side inlet space of the filter.

On the round filter element 12 facing side goes the radially inner peripheral wall 50 in one piece in a radially and circumferentially extending bottom portion 62 above. The bottom section 62 has a coaxial container-side connection piece 64 on, which is in the container interior 56 extends. The container-side connection piece 64 surrounds a connection opening 66 which the container interior 56 with the element interior 22 combines.

The container interior 56 facing free edge of the container side connecting piece 64 serves as a detent 68 for connection snap hook 70 a coaxial annular lid member 72 of the additive container 14 , The connection ratchet hooks 70 extend parallel to the axis 18 circumferentially evenly distributed radially within the radially inner peripheral side of the container side connecting piece 64 , Corresponding latching lugs are located on the radially outer peripheral sides of the respective Verbindungsrasthaken 70 and engage positively behind the locking receptacle axially 68 , The connection ratchet hooks 70 and the detent receptacle 68 are parts of the element container connection 15 ,

The cover element 72 serves inter alia the closure of the open end of the additive space 58 on the round filter element 12 facing side. The open end of the additive room 58 serves as a filling opening for the additive and is retrofitted with the cover element 72 locked. The cover element 72 has a circumferentially and radially extending annular disk-shaped cover section 74 on. The cover section 74 points to its the additive room 58 facing radially inward and radially outwardly each a coaxial Einsteckkragen 76 on. With the Einsteckkragen 76 is the lid element 72 from the open side into the additive room 58 plugged in and is between the perimeter walls 48 and 50 positioned radially.

The cover element 72 also has a coaxial circular hole which communicates with the connection opening 66 with forms. Radially outside next to the hole are the Verbindungsrasthaken 70 integral with the cover portion 74 connected.

On the container interior 56 axially facing outside is the coaxial container-side connecting piece 40 integral with the cover portion 74 connected. The locking hooks 44 are located on the free edge of the container-side connecting piece 40 which is the container interior 56 axially facing away. They are arranged circumferentially distributed. Latching lugs of the latching hook 44 are located on the radially outer peripheral sides.

In the area of locking arms of the locking hooks 44 are the radially outer peripheral sides relative to the radially outer peripheral side of the container side connecting piece 40 offset radially inward. In this way, the container-side spigot is 40 in the area of the locking hooks 44 stepped radially outside and there forms with its edge the counter support portion 38 ,

For mounting the filter element additive module 10 becomes the round filter element 12 with the filter medium 16 , the end discs 24 and 26 and the support tube 28 preassembled.

The container pot 46 and the lid member 72 of the additive container 14 are each made in one piece by injection molding of plastic. In the still open additive room 48 the additive is filled. The additive room 48 is with the cover element 72 locked. In the process, the connection snap hooks become 70 ahead in the container-side connection piece 64 plugged in and locked there. The Einsteckkragen 76 are doing in the additive room 58 plugged.

The additive container 14 is with the container-side connecting piece 40 advancing in the axial direction with the interposition of the O-ring seal 34 on the connection end plate 26 of the round filter element 12 plugged. In the process, the container-side connecting piece becomes 40 in the element-side connecting piece 30 guided. In the final position, the latching hooks lock 40 form-fitting behind the locking receptacles 42 of the round filter element 12 ,

Finally, the port sealing unit 54 at the end wall portion 52 of the additive container 40 assembled.

The sequence of the assembly steps can be meaningfully changed. For example, the connection sealing unit 54 be assembled at an earlier date.

The pre-assembled filter element additive module 10 is with the round filter element 12 preceded inserted in an axial direction of installation in a housing pot, not shown, of the filter housing of the filter designed as an alternating filter.

The filter pot is placed on the additive container 14 facing side closed with a housing cover, not shown. In the process, a connection piece of the housing cover with the connection sealing unit is made 54 connected. The housing cover also serves as a port, with which the filter can be attached to a corresponding filter head of the engine oil circuit. The filter head has corresponding oil passages for the supply of the engine oil to be treated and discharge of the treated engine oil. The connection piece of the housing cover is connected with the filter mounted to the oil channel for the discharge of the treated engine oil. Furthermore, the housing cover with respect to the axis 18 eccentric inlet openings which are connected to the channel of the filter head for supplying the motor oil to be treated. The inlet openings lead into the inlet space of the filter housing containing the filter element additive module 10 surrounds crude oil side.

Instead of the replaceable filter, the filter element-additive module 10 also be used with a filter with an openable filter housing. The filter element additive module 10 can be removed in particular for maintenance purposes of the filter housing and optionally, even partially, be replaced.

During operation of the engine engine oil flows through the channel of the filter head to the supply line on the side of the additive container 14 in the inlet space of the filter. The flow of the engine oil within the filter is in the 1 indicated by dashed arrows. The engine oil passes over the discharge openings 60 with the additive in the container interior 56 in contact and will be changed accordingly.

The modified with additive engine oil reaches the round filter element 12 , It flows through the filter medium 16 from radially outside to radially inside and flows through the openings of the support tube 28 in the element interior 22 ,

The filtered and modified with additive engine oil passes from the element interior 22 through the connection opening 66 in the container interior 56 , From there, the filtered and modified engine oil leaves the filter element-additive module 10 through the outlet opening on the side of the end wall section 52 and returns via the corresponding oil passage of the filter head back into the engine oil circuit.

In the 2 is a filter element additive module 10 shown according to a second embodiment. Those elements corresponding to those of the first embodiment of the 1 are similar, are provided with the same reference numerals. In contrast to the first embodiment, in the second embodiment, the closure function of the lid member 72 through a connection-side end plate 26 realized which at their the filter medium 16 axially facing away from the Einsteckkragen 76 having. On the connection ratchet hooks 70 and the container-side connecting piece 64 with the snap-in receptacle 68 is omitted in the second embodiment. The container-side connection piece 40 with the locking hooks 44 is integral with the bottom section 62 of the container pot 46 connected.

Further, in the second embodiment, the support tube 28 of the round filter element 12 built up like a rib.

Claims (7)

Filter element-additive module (10) of a filter for fluid, in particular oil, fuel, water, urea water solution or air, in particular an internal combustion engine, in particular of a motor vehicle, with at least one filter element (12), the at least one filter medium (16) for filtering the Fluid and at least one additive dispenser for at least one additive for the fluid, wherein the at least one additive dispenser at least one additive container (14) for providing the at least one additive, the at least one additive container (14) at least partially outside the at least a filter element (12) arranged and by means of at least one at least positive and / or non-positive element container connection (15) on the at least one filter element (12) is fixed, wherein the filter element (12) at one of the additive container (14) facing the end an annular connection-side end plate (26), which is adhesively bonded to the filter medium (16), wherein the filter element (12) is a hollow filter element, in particular a round filter element, characterized in that the element-container connection (15) has a snap connection or latching connection (42, 44, 68, 70), wherein the terminal-side end plate (26) is formed on its radially inner peripheral side as an element-side connecting piece (30) which extends coaxially into an element interior (22) and whose end disc (26) facing away from a detent receptacle (42) for latching hooks (44) of a container-side connecting piece (40). Filter element additive module after Claim 1 , characterized in that the at least one filter element (12) and the at least one additive container (14) with respect to an axis (18) of the filter element-additive module (10) are arranged axially one behind the other. Filter element-additive module according to one of the preceding claims, characterized in that the at least one additive container (14) is arranged on the raw fluid side with respect to the at least one filter element (12). Filter element-additive module according to one of the preceding claims, characterized in that at least one additive container (14) is arranged on a connection side and / or opposite a connection side of the filter element-additive module (10). Filter element-additive module according to one of the preceding claims, characterized in that between the at least one filter element (12) and the at least one additive container (14) at least one seal (34), in particular an O-ring seal, is arranged. Filter element-additive module according to one of the preceding claims, characterized in that the filter element-additive module (10) in a non-destructively disclosed exchange filter or an openable filter, in particular interchangeable, is usable. Filter with at least one filter element-additive module (10) according to one of the preceding claims.

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