DE202005020008U1 - Filter element for an engine intake unit of a motor vehicle comprises an adsorbent material for adsorption of moisture and acid gases on their way from the atmosphere into the engine - Google Patents

Abstract

The filter element (20) for an engine intake unit (14) of a motor vehicle (10) comprises an adsorbent material for adsorption of moisture and acid gases on their way from the atmosphere (16) into the engine (12).

Description

The The invention relates to a filter element for an air intake device a vehicle internal combustion engine, with a perfused interior of the Air suction device, in which the filter element is provided, having an adsorbent material, the one the air intake flowing through flow medium contacted, wherein the adsorbent material for adsorbing harmful emissions, as hydrocarbons, provided by the internal combustion engine in the surrounding atmosphere is.

From the EP 1 321 659 A2 An air intake device is known. In this known air intake device, the adsorbent material of a filter element can be used at least in part of the flow cross-section of the flow-through interior of the air intake for at least partial flow through the flow medium. For this purpose, the filter element may be at least partially formed as an inner wall panel of the air intake or as a removable filter element.

in the latter case, the filter element is preferably as an additional filter to a non-adsorptive, usual Intake air filter formed. The adsorbent material may be at least consist essentially of activated carbon.

A similar air intake device of a vehicle internal combustion engine with a space traversed by the air intake in which a filter element is provided which has an adsorbent material which contacts a flow medium flowing through the air intake, the adsorbent material for adsorbing harmful emissions, in particular of hydrocarbons suitable that are generated by the internal combustion engine is out of the EP 1 110 593 A1 known.

These known filter elements for Air aspirators are therefore capable of producing harmful emissions, generated by the internal combustion engine, and by the air intake in the surrounding atmosphere would be delivered with Help of the filter element, which has adsorbing material, to prevent them from entering the surrounding atmosphere.

In Such an air intake of a vehicle internal combustion engine are electronic components, such as air mass sensors or the like, and technical installations, such as turbochargers, etc., arranged, the Moisture or condensed from the moisture when the vehicle is stationary Water and acid gases from the ambient air are exposed. Especially at road junctions, in congestion zones, etc. is the concentration of acidic gases in the Air, i. in the surrounding atmosphere, relatively high. such Acid gases in conjunction with water form acids that are the electronic ones Components, such as air mass sensors, etc., can damage and in extreme cases to a total failure of the electronics of the vehicle internal combustion engine to lead can.

Basically finds An adsorption of various gases takes place only at engine standstill. Once the engine is running, lie on the flowed through Filter element flow rates of about 10 m / sec during the of the driving operation can rise up to 40 m / sec. With such huge flow rates As a result of far too short contact times almost none Adsorption takes place more.

Therefore the invention has the object, a filter element of initially mentioned type for to provide an air intake device by means of which the electronic components and the technical installations in the air intake are arranged, optimally protected become.

These The object is achieved by the Features of claim 1, i. solved by that the adsorbing Material of the filter element not only for adsorption harmful Emissions, such as hydrocarbons produced by the internal combustion engine but at the same time also for the adsorption of moisture and sour gases from the surrounding atmosphere in the flow direction to the internal combustion engine is provided.

The filter element according to the invention is advantageously not only harmful to adsorption Emissions, such as hydrocarbons, suitable by the internal combustion engine and emitted into the surrounding atmosphere, but is also the filter element according to the invention also suitable for this, the electronic components and the technical installations in the air intake device against moisture and acid gases, as they exist in the surrounding atmosphere to protect.

With the aid of the filter element according to the invention prevents condensate and acid gases in the field of electronic components and technical installations mix and get as acids to the electronic components and / or technical installations. It is particularly important here to protect the air mass sensor in the air intake from corrosion, because the air mass sensor in the control loop of the engine management of a vehicle internal combustion engine is an important element, and a corrosion-related off If the air mass sensor fails, the vehicle will fail.

So far the said air mass sensor is exclusively by means of particle filters protected from contamination.

The filter element according to the invention is during a stoppage of the vehicle and when the vehicle and running internal combustion engine, e.g. at intersections, during one Congestion, etc. effective. The filter element adsorbs water very well - and indeed in the range of a relative humidity of 20 to 90%, preferably in the range of 30 to 80%, and more preferably in the range of 50 to 75%. With the aid of the filter element according to the invention is prevented that in the situations mentioned, i. at vehicle standstill and with the vehicle stationary with the internal combustion engine running, air from the surrounding atmosphere correspondingly high humidity through the air intake through to the said sensitive electron components and technical installations. With the aid of the filter element according to the invention Thus, the formation of condensation on the electronic components and / or technical installations prevented.

After this especially at road intersections in agglomerations, the concentration of acidic gases in the ambient air, which reaches the engine compartment, is relatively large, the invention results in the advantage that with the help of the filter element, a concentration of the acidic Gases is prevented.

at switched off internal combustion engine can Hydrocarbons from the combustion engine via open valve positions evaporate and through diffusion over the air suction device, i. the intake tract, in the environment reach. The filter element according to the invention prevents further diffusion into the surrounding atmosphere and works as a barrier layer. This process takes place in particular then, if the combustion engine is still warm and / or if the vehicle stands in the sun and heats up.

is the vehicle in an environment of high air pollution turned off and at the same time prevail high humidities, such as for example during the transitional periods in the spring or late autumn, or in the summer after a heavy rain, moisture and acid gases, after switching off the internal combustion engine in the intake tract are located, or from the outside get into the intake, over diffuse the intake tract in the direction of the internal combustion engine and on Air mass sensor, which is usually downstream to the engine air filter is attached, condense. In this way, can be at the air mass sensor Forming acid droplets. These acid droplets can too cause corrosion and in extreme cases to destroy the air mass sensor.

at running internal combustion engine, the filter element is regenerated, i.e. previously adsorbed hydrocarbons and adsorbed water are reflected by the air stream drawn into the internal combustion engine regenerated. However, any separated acidic gases will be not desorbed again, i. the proportion of adsorbents, the acidic Gases filter out, age over the service life of the filter element. As the concentrations of possibly However, separated acidic gases usually in the lower ppb range lie, the capacity can designed so large the filter element be that for it the entire lifetime of the vehicle is enough.

A Adsorption or filtration of acid gases is with the internal combustion engine running - in consequence the one mentioned above short contact time - negligible. The filter element according to the invention or the filter material of the filter element works practically as a diffusion barrier - and though for Hydrocarbons from the combustion engine in the direction of the atmosphere, and for sour Gases and water vapor from the surrounding atmosphere in the direction of the internal combustion engine.

Prefers it is when the adsorbent in the filter element according to the invention Material on a gas permeable transfer medium the filter element is fixed by means of a binder. The adsorbing Material preferably forms a coating of the gas-permeable carrier medium of Filter element. The gas permeable transfer medium and the binder are expediently until 150 ° C temperature stable.

Prefers is it when the gas-permeable carrier medium of the filter element according to the invention has a 3D structure. This can for example by a be realized reticulated polyurethane foam. As appropriate has it proved here when the PUR foam has a cell density of 10 to 36 ppi (pores / inch) (= 4 to 14 pores / cm), preferably 15 to 20 ppi (= 6 to 8 pores / cm).

It is according to the invention also possible, that the gas permeable transfer medium consists of a spacer knitted fabric. The spacer fabric may be spaced apart, gas permeable Cover layers and the cover layers interconnecting monofilaments exhibit.

According to the invention, it is also possible that the gas-permeable carrier medium consists of rubber hair, that is, of coconut fibers, which surrounds with latex telt are.

Similarly Is it possible, that the gas permeable transfer medium of the filter element according to the invention from a voluminous Fleece exists. This voluminous fleece can be a PES fleece act.

The filter element according to the invention can be composed of individual layers that are different coated, i. with different adsorbing materials are coated, or it may be formed in one layer, wherein the coating of a corresponding mixture of different adsorbing materials.

at has the filter elements according to the invention it proved to be expedient if that for fixing the adsorbent material to the gas-permeable support medium provided binder is an acrylate-based binder.

The adsorbing material of the filter element according to the invention consists preferably from activated carbon powder. The particle size of the activated carbon powder determines the adsorption and desorption behavior of the filter element according to the invention. With the filter element according to the invention In particular, a rapid complete desorption in the backwashing of the Filter element - like they with granulated coal in the desired Dimensions unavailable is reached become.

In addition, can the gas permeable transfer medium of the filter element according to the invention equipped with PCM (Phase Change Materials). Such an extra equipment With PCM, the heat emitted by the engine is absorbed can be, and in this way the temperature of the filter element at least approximately constant and low. This way results an improved adsorption emitted by the internal combustion engine harmful Emissions such as hydrocarbons, because known low temperatures, the adsorption capacity of an adsorbent is higher as at high temperatures.

Is appropriate it, when in the filter elements according to the invention the adsorbent material is a mixture of microporous activated carbon, mesoporous activated carbon and catalytic activated carbon. The microporous activated carbon can be a grain possess, in which the proportion of particles> 71 microns <10%. In the microporous Activated carbon is preferably a water vapor activated coconut activated carbon with an iodine value of 1200 ± 100 mg / g and a pH of 9 to 11. The mesoporous charcoal may have a grain at the proportion of particles is> 75 μm <5%. At mesoporous activated carbon it is expediently an acidic and steam-activated wood activated carbon having an iodine value> 1200 mg / g and a pH of 4 to 6.

The microporous and the mesoporous ones Activated carbon can in a mixing ratio from 0: 100 to 100: 0, preferably 50:50.

at the filter element according to the invention can the adsorbent material is a mixture of activated carbon - for adsorption of hydrocarbons - and Zeolite - to Adsorption of water - be. Similarly Is it possible, that the adsorbent material is a mixture of activated carbon, catalytic activated carbon and zeolite is.

When It has proven advantageous if the filter element is gradient-like is constructed, wherein the surrounding atmosphere facing side of the filter element is equipped with catalytically active activated carbon, which can be removed acidic gases is provided and increased adsorption to water and wherein the engine side facing the Filter element is equipped with activated carbon, which has a pronounced adsorption capacity across from Has hydrocarbons. It can be at the internal combustion engine facing side of the filter element provided activated carbon a Be BWC activated carbon. BWC activated carbon is an activated carbon, which is a very high work capacity for n-butane - measured according to ASTM D 5228-92 - has.

The filter elements according to the invention can be single-layered or re be formed multi-layered of the various activated carbons. At a single-layered design of the filter element is the gas-permeable carrier medium the filter element coated with a corresponding coal mixture. In a multi-layered design of the filter element, any gas-permeable carrier medium layer be coated with the appropriate activated carbon.

Around to prevent adsorbent material coming from the carrier medium and certain circumstances solves, resp. where such a detachment not reliable can be ruled out, to prevent the detached adsorbing Material enters the combustion engine, it may be appropriate if the filter element of a gas-permeable, the adsorbent material restrained wrapping is surrounded. On such a gas-permeable enclosure can be omitted if reliable it is ensured that the adsorbing material with the help of a suitable binder is securely fixed to the support medium, and a detachment adsorbing material is excluded from the gas-permeable carrier medium.

A different possibility is that in the perfused Space of the air intake between the filter element according to the invention and the internal combustion engine, a Partikelabscheideinrichtung provided is.

The filter element according to the invention can be used as a lining of a sewer wall or a suction funnel be formed of the air intake. Likewise, it is e.g. possible, that the filter element is diagonally fixed in a duct wall and flows around on both sides becomes.

It is according to the invention also possible, that the filter element to an in-flow space of the air intake arranged adjacent engine air filter, in the flow direction before or behind this and parallel to this, is provided. In the known Engine air filter is a particulate filter that no Has adsorption properties.

Further Details, features and advantages will be apparent from the following Description in conjunction with the accompanying drawings.

It demonstrate:

1 schematically cut in a side view of a vehicle with an internal combustion engine and an air intake device connected to this, which contains a filter element according to the invention and sensitive electronic components, such as an air mass sensor o. The like.,

2 1 schematically shows an embodiment of the filter element according to the invention for illustrating the three flows through the filter element, namely the flow of harmful emissions, such as hydrocarbons produced by the internal combustion engine, and the air flow coming from the surrounding atmosphere, which contains moisture and acid gases,

3 one of the 2 similar schematic representation of a filter element according to the invention, which is multi-ie double-layered and which is enclosed by a gas-permeable enclosure,

4 a cross-sectional view of an embodiment of the air intake device with a lining of the inner wall of the channel wall filter element,

5 one of the 4 similar sectional view, wherein the filter element is set diagonally in the channel,

6 3 is a schematic sectional view of an intake funnel of the air intake device, wherein a commercially available engine air filter is combined with a filter element according to the invention which is arranged downstream of the engine air filter,

7 one of the 6 similar sectional view, wherein the filter element according to the invention is arranged upstream of the commercial engine air filter,

8th a the 6 and 7 Similar sectional view, wherein the filter element according to the invention arranged on the inside of the intake manifold circumferentially, spaced from the engine air filter, is provided, and

9 a the 6 to 8th Similar sectional view, wherein a Partikelabscheideeinrichtung is provided in the flow direction after the filter element according to the invention to prevent the inventive filter element powdered adsorbent material that dissolves from the gas-permeable support medium of the filter element, penetrates into the engine and damaged it.

1 shows cut away schematically in a side view of a vehicle 10 with an internal combustion engine 12 to which an air intake device 14 connected. The air intake device 14 is with the surrounding atmosphere 16 fluidically connected. In the interior eighteen the air suction device 14 is a filter element 20 arranged, which is equipped with adsorbent material.

In the air intake device 14 There are also electronic components, such as an air mass sensor 22 , Mechanical devices, such as a compressor, a turbocharger o. The like.

2 schematically illustrates an embodiment of the filter element 20 , which is a gas-permeable carrier medium 24 having, by means of a binder 26 adsorbing material 28 is fixed.

The adsorbent material 28 is suitable for adsorbing harmful emissions, such as hydrocarbons, from the combustion engine 12 be generated and by the air intake 14 through into the surrounding atmosphere 16 would emerge. Is in 2 through the arrow 30 indicated. With the help of the adsorbing material 28 of the filter element 20 This will prevent the engine from burning 12 generated harmful emissions, such as CHe, into the surrounding atmosphere 16 exit, ie they are in the filter element 20 adsorbed.

In the filter element according to the invention 20 is the adsorbing material 28 in addition to the adsorption of moisture and acid gases from the surrounding atmosphere 16 intended. Is in 2 through the two to the arrow 30 opposite oriented arrows 32 and 34 illustrated schematically. With the aid of the filter element according to the invention 20 So there is also an adsorption of moisture, which is indicated by the arrow 32 is indicated, and an adsorption of acid gases, which is indicated by the arrow 34 is hinted at from the surrounding atmosphere 16 coming in the filter element 20 be adsorbed, so that, for example, the air mass sensor 22 is protected against moisture, ice formation, corrosion, etc. Of course, this also applies to other electronic components and mechanical devices, as they have been mentioned above by way of example.

3 schematically illustrates an embodiment of the filter element 20 , that - unlike the filter element 20 according to 2 , which is designed in one layer - multilayer or with two layers 38 and 40 is trained. The location 38 is the surrounding atmosphere 16 facing and the location 40 is the internal combustion engine 12 facing. The location 38 is equipped with catalytically active activated carbon, which is intended to remove acidic gases and has an increased adsorption to water. The internal combustion engine 12 facing location 40 of the filter element 20 is equipped with activated carbon, which has a pronounced adsorption capacity against harmful emissions, in particular to hydrocarbons. In this way, so there is a gradient-like structure of the filter element 20 ,

In the filter element 20 according to 2 Such a gradient-like structure is also possible, that is, that of the surrounding atmosphere 16 facing side 42 of the filter element 20 is equipped with catalytically active activated carbon, which is provided for the removal of acidic gases and has an increased adsorption to water, and the internal combustion engine 12 facing side 44 of the filter element 20 is equipped with activated carbon, which has a pronounced adsorption capacity to hydrocarbons. Also in this way is a gradient-like design of the filter element 20 possible, even if this is realized only in one layer, ie with a single gas-permeable carrier medium.

The training according to 3 is different from the one in 2 schematically illustrated embodiment also in that the filter element of a gas-permeable and gas-permeable support medium 24 detached adsorbent material 28 restrained serving 46 surrounded that is enclosed.

4 schematically illustrates a channel wall in a cross-sectional view 48 an air intake device 14 , wherein the channel wall 48 the air suction device 14 with a filter element according to the invention 20 is lined so that edge of a filter zone 50 and inside a free flow cross-section 52 results.

5 illustrates a channel wall 48 an air intake device 14 with a filter element 20 , which is set diagonally in the channel, so that on both sides of the filter element 20 in each case a free flow cross section 52 results.

6 illustrates schematically cut in a sectional view of a suction hopper 54 an air intake device 14 in which a commercial engine air filter 54 is arranged. The engine air filter 54 is a filter element according to the invention 20 assigned in the flow direction of the arrows 32 and 34 as they communicate above 2 have been dealt with, downstream, ie downstream of the engine air filter 54 is arranged. In contrast, illustrates the 7 schematically an embodiment, wherein the filter element according to the invention 20 the engine air filter 54 upstream, ie in the direction of the arrow 32 . 34 upstream of the engine air filter 54 is provided.

8th schematically illustrates an intake funnel 53 with a standard engine air filter 54 and a filter element according to the invention 20 , on the intake funnel 53 , from the engine air filter 54 axially spaced, is arranged.

9 clarified in one of the 6 in principle similar training, a combination of engine air filter 54 and filter element according to the invention 20 , as well as a Partikelabscheideinrichtung 56 , which prevents the filter element 20 dissolved powdered adsorbent in the internal combustion engine 12 of the vehicle 10 reach.

The present invention has the following advantages:
After stopping the engine, residual fuel emissions emitted by the engine are adsorbed by the filter element and prevented from exiting into the surrounding atmosphere. In addition, the electronic components and the technical equipment, such as turbocharger, compressor, air mass sensor, etc., which are located in the air intake, are protected by the filter element from moisture and acid gases. Moisture adsorption is very important because it prevents condensation that could damage sensitive components and components. In addition, it prevents that at low temperatures below 0 ° C, the components and components with Ice would be coated, whereby their function would be limited or prevented. The adsorption of hydrocarbons also serves to improve the ecological balance of the vehicle.

Both Functions, i. the absorption of humidity and acid Gases of the air entering the air intake and the adsorption of hydrocarbons from the internal combustion engine derived residual emissions, must Shutdown of the internal combustion engine in its maximum expression available be. That is why it is imperative that even at very short Routes both the humidity and the residual emissions Completely be delivered.

water and hydrocarbons become in the case of a vehicle standstill emitted and are at a standstill of the filter element according to the invention added. The acid gases do not fall during a standstill but when the internal combustion engine is running on the road and the filter element according to the invention is in driving with respect to Regenerates moisture and hydrocarbons.

The filter element according to the invention is flexible, malleable and compressible, and therefore can be in an advantageous Way are arranged such that it is not necessarily flows through. The filter element according to the invention it also allows parts of the air intake with the To line filter element or as desired another flow around realize. Furthermore, the flexibility of the filter element a self-seal, so that the air intake or filter intake without additional sealing elements executable is. Furthermore be through the filter element according to the invention undesirable Dead volumes that deal with hydrocarbons or with acid gases or water from the humidity can accumulate, avoided.

The filter element according to the invention allows it is, for example, that it is the atmosphere side with a catalytic and moisture adsorbing activated carbon and motor side is equipped with a BWC activated carbon, so is it is possible to install a property gradient that has the important properties the adsorbent even better brings to bear. It is the same possible, apply two different layers with corresponding adsorbents, to the respective desired Property profile on the inflow and outflow side of the filter element to realize.

10

vehicle

12

Internal combustion engine (from 10 )

14

Air intake device (from 10 For 12 )

16

surrounding atmosphere (at 10 )

18

Interior (from 14 )

20

Filter element (in 14 )

22

Air mass sensor (in 14 For 12 )

24

gas-permeable carrier medium (from 20 )

26

Binders (on 24 For 28 )

28

adsorbent material (from 20 )

30

Arrow (at 20 )

32

Arrow (at 20 )

34

Arrow (at 20 )

38

Location (from 20 )

40

Location (from 20 )

42

Side of 20 at 16 )

44

Side of 20 at 12 )

46

Serving (from 20 )

48

Duct wall (from 14 )

50

Filter zone (by 14 )

52

free flow cross section (in 48 )

53

Intake funnel (from 14 )

54

Engine air filter (in 14 )

56

Particle Separator (for 28 )

Claims (33)

Filter element for an air intake device ( 14 ) of a vehicle internal combustion engine ( 12 ), with a flow-through interior of the air intake device ( 14 ), in which the filter element ( 20 ), which is an adsorbent material ( 28 ) having an air intake device ( 14 ) flowing through the flow medium, wherein the adsorbent material ( 28 ) for adsorbing harmful emissions, such as hydrocarbons, from the internal combustion engine ( 12 ) into the surrounding atmosphere ( 16 ), characterized in that the adsorbent material ( 28 ) of the filter element ( 20 ) also for the adsorption of moisture and acid gases from the surrounding atmosphere ( 16 ) in the direction ( 32 . 34 ) to the internal combustion engine ( 12 ) is provided. Filter element according to claim 1, characterized in that the adsorbent material ( 28 ) on a gas-permeable carrier medium ( 24 ) of the filter element ( 20 ) by means of a binder ( 26 ) is fixed. Filter element according to claim 2, characterized in that the gas-permeable carrier medium ( 24 ) is thermally stable up to 150 ° C. Filter element according to claim 2, characterized in that the binder ( 26 ) is thermally stable up to 150 ° C. Filter element according to one of claims 1 to 3, characterized in that the gas-permeable carrier medium ( 24 ) has a 3D structure. Filter element according to claim 5, characterized in that the gas-permeable carrier medium ( 24 ) is formed by a reticulated PU foam. Filter element according to claim 6, characterized that the PUR foam has a cell density of 10 to 35 ppi (4 to 14 Pore / cm), preferably 15 to 20 ppi (6 to 8 pores / cm). Filter element according to claim 5, characterized in that the gas-permeable carrier medium ( 24 ) consists of a spacer knitted fabric. Filter element according to claim 8, characterized in that that the spacer knitted fabric spaced apart, gas-permeable cover layers and the cover layers have interconnecting monofilaments. Filter element according to claim 5, characterized in that the gas-permeable carrier medium ( 24 ) consists of rubber hair. Filter element according to claim 10, characterized in that that the rubber hair is made of coconut fibers coated with latex are. Filter element according to claim 5, characterized in that the gas-permeable carrier medium ( 24 ) consists of a voluminous fleece. Filter element according to claim 12, characterized in that that the voluminous Fleece is a PES fleece. Filter element according to one of claims 2 to 4, characterized in that for fixing the adsorbent material ( 28 ) on the gas-permeable carrier medium ( 24 ) intended binders ( 26 ) is an acrylate-based binder. Filter element according to claim 1, characterized in that that the adsorbent material consists of activated carbon powder. Filter element according to claim 1, characterized in that the gas-permeable carrier medium ( 24 ) is additionally equipped with PCM (Phase Change Materials). Filter element according to claim 1, characterized in that that the adsorbent material is a mixture of microporous activated carbon, mesoporous activated carbon and catalytic activated carbon. Filter element according to claim 17, characterized in that that the microporous Activated carbon a grain in which the proportion of particles is> 71 μm <10%. Filter element according to claim 17 or 18, characterized characterized in that the microporous activated carbon is a water vapor activated Coconut activated carbon with an iodine value of 1200 ± 100 mg / g and a pH of 9 to 11 is. Filter element according to claim 17, characterized in that that the mesoporous Activated carbon a grain in which the proportion of particles is> 75 μm <5%. Filter element according to claim 20, characterized in that that the mesoporous Activated carbon is an acid and steam-activated wood activated carbon having an iodine value of> 1200 mg / g and a pH is 4 to 6. Filter element according to claim 17, characterized in that that the microporous Activated carbon and mesoporous Activated carbon in a mixing ratio of 0: 100 to 100: 0, preferably 50:50. Filter element according to claim 1, characterized in that that the adsorbent material is a mixture of activated carbon and Zeolite is. Filter element according to claim 1, characterized in that that the adsorbent material is a mixture of activated carbon, catalytic Activated carbon and zeolite is. Filter element according to claim 1, characterized in that the filter element ( 20 ) is constructed in a gradient-like manner, whereby the surrounding atmosphere ( 16 ) facing side ( 42 ) of the filter element ( 20 ) is provided with catalytically active activated carbon, which is provided for the removal of acidic gases and has an increased adsorption to water, and wherein the internal combustion engine ( 12 ) facing side ( 44 ) of the filter element ( 20 ) is equipped with activated carbon, which has a pronounced adsorption capacity to hydrocarbons. Filter element according to claim 25, characterized in that the at the the internal combustion engine ( 12 ) facing side ( 44 ) of the filter element ( 20 ) provided activated carbon is a BWC activated carbon. Filter element according to claim 25, characterized in that the filter element ( 20 ) is single-layered and multi-layered with respect to the different activated carbons. Filter element according to claim 25, characterized in that the filter element ( 20 ) is formed multi-layered according to the different activated carbons. Filter element according to one of claims 1 to 28, characterized in that the filter element ( 20 ) of a gas-permeable, the adsorbent material ( 28 ) restrained serving ( 46 ) is enclosed. Filter element according to one of claims 1 to 28, characterized in that in the perfused interior ( eighteen ) of the air intake device ( 14 ) between the filter element ( 20 ) and the internal combustion engine ( 12 ) a particle separator ( 56 ) is provided. Filter element according to one of claims 1 to 30, characterized in that the filter element ( 20 ) as a lining of a channel wall ( 48 ) or an intake funnel ( 53 ) of the air intake device ( 14 ) is trained. Filter element according to one of claims 1 to 30, characterized in that the filter element ( 20 ) in the air intake device ( 14 ) is set diagonally and flows around on both sides. Filter element according to one of claims 1 to 30, characterized in that the filter element ( 20 ) in one in the air intake device ( 14 ) arranged engine air filter ( 54 ) is provided in the flow direction before or behind this and parallel to this.