CN113047986A

CN113047986A - Empty filter casing part, empty filter casing assembly, empty filter and empty system of straining

Info

Publication number: CN113047986A
Application number: CN201911372518.7A
Authority: CN
Inventors: 曹晨吉
Original assignee: Mann and Hummel GmbH
Current assignee: Mann and Hummel GmbH
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2021-06-29

Abstract

The invention discloses an air filter housing part which comprises a first housing part, a second housing part connected to the bottom of the first housing part, and an insertion pipe structure formed by connecting the second housing part and the first housing part and at least partially positioned inside the housing part. The invention also discloses an air filter shell assembly comprising the air filter shell part, an air filter and an air filter system thereof, and the aim of effectively prolonging the equivalent length of the air filter inlet pipe can be fulfilled due to the integrated arrangement of the insert pipe structure, so that the resonance frequency of the air filter can be further reduced under the condition that the average cross section area of the air filter inlet pipe and the volume of the air filter are not changed, and the performances of attenuation of the air filter and reduction of the air inlet noise of an engine are further improved.

Description

Empty filter casing part, empty filter casing assembly, empty filter and empty system of straining

Technical Field

The invention relates to an air filter housing part, which comprises a first housing part, a second housing part connected to the bottom of the first housing part, and an insertion pipe structure formed by connecting the second housing part and the first housing part and having an air outlet positioned inside the housing part. The invention also relates to an air filter shell assembly, an air filter and an air filter system comprising the air filter.

Background

At present, vehicles are increasingly incorporated into the lives of ordinary households. People also pay more attention to noise and vibration quality (NVH) of the whole vehicle. Intake system noise is one of the major sources of noise in a vehicle. The engine intake system mainly comprises an air filter (also called air filter for short) and an intake manifold, wherein the air filter is mainly used for filtering air entering the engine so as to filter impurities in the air, conveying clean air into the intake manifold and distributing the clean air to each cylinder body through the intake manifold. Besides the function of filtering air, the air filter utilizes the suddenly enlarged section of the air filter relative to the air filter air inlet pipe and the air filter air inlet pipe, and simultaneously, the air filter also serves as an acoustic component-expansion cavity to play the roles of attenuating and reducing the air inlet noise of the engine.

The air filter is used as an expansion cavity, the resonance frequency f0 of the air filter is related to the average sectional area Aw of the air filter inlet pipe, the equivalent length la of the air filter inlet pipe, the volume V of the air filter and the sound velocity c, and the calculation formula is as follows:

in order to achieve a good noise attenuation effect, the resonance frequency f0 of the air filter needs to be as low as possible, and it can be seen from the formula that the smaller the average cross-sectional area Aw of the air filter inlet pipe is, the longer the equivalent length la of the air filter inlet pipe is, and the larger the volume V of the air filter is, the lower f0 is. Therefore, in practical applications, the average cross-sectional area Aw of the air intake pipe is reduced as much as possible, the equivalent length la of the air intake pipe is increased, and the volume V of the air cleaner is increased to reduce the resonance frequency f0 as much as possible. However, the average cross-sectional area Aw of the air intake duct is reduced to a limited extent because the flow resistance is increased and surging is caused. The volume V of the air cleaner is limited by the available space of the engine compartment, and cannot be increased at once, and under the condition that the available space of some engine compartments is limited, sufficient volume cannot be ensured. The equivalent length la of the lengthened air filter inlet pipe is limited by the available space of the engine compartment, and the length is limited. The net result is that the resonant frequency f0 of the air cleaner is not low enough to effectively attenuate and reduce engine intake noise.

Disclosure of Invention

The invention aims to provide an air filter shell part which can effectively prolong the equivalent length of an air filter inlet pipe after being molded, effectively reduce the resonance frequency of an air filter under the condition that the average cross section area of the air filter inlet pipe and the volume of the air filter are not changed, improve the attenuation of the air filter and reduce the performance of the air inlet noise of an engine. The invention also aims to provide the air filter shell assembly and the air filter thereof. It is still another object of the present invention to provide an air filter system including the air filter.

The invention discloses an air filter housing part comprising an insertion pipe structure, which is a component of a housing of an air filter.

Furthermore, the insertion tube structure is a straight tube structure extending into the shell part along the air inlet direction.

Further, the first housing part is provided with a first half pipe portion, the second housing part comprises at least a second half pipe portion, and the insert pipe structure comprises at least an insert pipe body portion formed by interconnecting the first half pipe portion of the first housing part and the second half pipe portion of the second housing part.

Further, the first half pipe part is formed by a part of the bottom wall of the first housing member bulging upward, and the second housing member is connected to the bottom of the first housing member.

Further, the insertion tube structure further comprises a tubular connecting part communicated with an external air inlet part, and the tubular connecting part and the insertion tube body part are sequentially arranged along the air inlet direction.

Further, the tubular interface portion is disposed beyond a bottom edge of the first housing piece.

Further, the tubular connecting portion is provided integrally with one of the first half pipe portion and the second half pipe portion, and the tubular connecting portion has an open half pipe portion radially beyond the first half pipe portion or the second half pipe portion provided integrally therewith, and the tubular connecting portion is connected with the other of the first half pipe portion and the second half pipe portion by the half pipe portion.

Furthermore, the end of the half pipe part of the tubular connecting part, which is deviated from the air inlet side, is a first bevel end which is obliquely arranged, and the connecting end of the first half pipe part or the second half pipe part and the half pipe part forms a second bevel end which is adaptive to and connected with the first bevel end.

Further, the half pipe portion is further integrally provided at a first bezel end position with a first flange portion extending outward in the first bezel end inclination direction, and the first half pipe portion or the second half pipe portion is provided at a second bezel end position with a second flange portion extending outward in the second bezel end inclination direction, the first flange portion and the second flange portion being connected to each other.

Further, the first flange and the second flange each extend beyond a bottom edge of the first shell member.

Further, the radial cross-section of the first half pipe portion and the second half pipe portion is semicircular, C-shaped or semi-elliptical.

Furthermore, the second shell part also comprises a cavity part which is connected and arranged at the rear side of the second half pipe part along the air inlet direction and extends towards the direction far away from the bottom of the first shell part, an opening is arranged at the inner end position of the bottom wall of the first shell part close to the first half pipe part, and the cavity part is correspondingly connected to the opening and communicated with the insertion pipe structure and the inside of the first shell part.

Furthermore, an expansion part which protrudes outwards and is used for being matched with the cavity part is formed at the position, corresponding to the cavity part, of the side wall of the first shell part.

Further, the first shell part and/or the second shell part are/is of an injection-molded integrated structure.

Further, the first housing member and the second housing member are connected by vibration friction welding.

The invention also discloses an air filter shell assembly which comprises the air filter shell part and a second air filter shell part, wherein the second air filter shell part is connected with the air filter shell part and is used for forming a cavity for accommodating the filter element.

Further, the second air filter housing portion has an air outlet duct for outflow of air flowing into the interior of the air filter housing portion from the insertion tube structure.

The invention also discloses an air filter, which comprises the air filter shell assembly and a filter element arranged in the air filter shell assembly, wherein the filter element is positioned in a cavity formed by the air filter shell part and the second air filter shell part of the air filter shell assembly.

Further, air entering the interior of the air filter housing portion through the insert tube structure flows out of the air filter from the air outlet tube of the second air filter housing portion after passing through the filter element.

The invention also discloses an air filtering system which comprises the air filter and an air filtering air inlet pipe which is connected with the air filter and used for air to enter the air filter.

Further, the air filter air inlet pipe is communicated with the insert pipe structure of the air filter.

Has the advantages that: the air filter shell part comprises the insertion tube structure which is at least partially positioned in the shell part, the equivalent length of the air filter inlet tube can be effectively prolonged through the insertion tube structure, and the resonance frequency of the air filter can be further reduced under the condition that the average cross section area of the air filter inlet tube and the volume of the air filter are not changed, so that the attenuation of the air filter is improved, and the performance of engine air inlet noise is reduced. And because the insert pipe structure is formed by connecting the first shell piece and the second shell piece, namely the first shell piece and the second shell piece can be manufactured separately and then connected, thereby forming the insert pipe structure, the manufacturing process of the air filter shell part is greatly simplified, and the insert pipe can be reasonably ensured to meet the required design requirements (such as length and the like).

The invention also discloses an air filter shell assembly, an air filter and an air filter system, and the purpose of effectively prolonging the equivalent length of the air filter inlet pipe can be realized due to the existence of the insertion pipe structure, so that the resonance frequency of the air filter can be further reduced under the condition that the average cross section area of the air filter inlet pipe and the volume of the air filter are not changed, and the performances of attenuation of the air filter and reduction of the air inlet noise of an engine are further improved.

Drawings

The invention will be described in more detail below using examples of embodiments shown in the drawings. The attached drawings are as follows:

FIG. 1 is an exploded view of the air filter housing portion of the present invention;

FIG. 2 is a perspective view of the air filter housing portion of the present invention in an assembled condition;

FIG. 3 is a schematic longitudinal sectional view of the air filter according to the present invention;

FIG. 4 is a perspective view of the air filter of the present invention in an assembled state;

fig. 5 is an exploded view of the air filter according to the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiment examples shown in the drawings. In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, cannot be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Fig. 1 is an exploded view of an air cleaner housing according to the present invention, and fig. 2 is a perspective view of the air cleaner housing according to the present invention in an assembled state. As shown in fig. 1 and 2, the air filter housing portion 50 of the present invention, which is used to form the air filter 1 together with the air filter cover 10 and the air filter cartridge 20, includes a first housing member 30 and a second housing member 40, wherein the first housing member 30 has a structure having a bottom wall and a peripheral side wall, the second housing member 40 is connected to the bottom of the first housing member 30, and when the second housing member 40 is connected to the bottom of the first housing member 30, an insert pipe structure partially located inside the housing portion is formed, the insert pipe structure has an air inlet end and an air outlet end, the air inlet end is located on the side wall of the housing portion 50 or the side wall extending out of the housing portion 50 is located outside the housing portion 50 to be connected to an external air filter inlet pipe, so that air passing through the external air filter inlet pipe is introduced into the air filter 1, and the air outlet end of the insert pipe structure is located inside the housing portion 50, just so make the at least partial casing portion 50 inside that is located of intubate structure to can effectually prolong the equivalent length of empty intake pipe of straining, strain the intake pipe average cross section and the unchangeable condition of air cleaner volume under empty, can further reduce air cleaner's resonant frequency, and then improved air cleaner decay, reduced the performance of engine noise of admitting air.

As shown in fig. 1 and 2, the insertion tube structure is a straight tube structure that extends into the housing portion 50 in the air intake direction. This allows the air intake to be carried out smoothly and effectively ensures the extension of the insert tube structure within the housing portion 50 to ensure an extension of the equivalent length of the air filter inlet tube.

And, as shown in fig. 1 and 2, the bottom of the first housing member 30 is provided with a first half pipe portion 301 which is open downwards, and the second housing member 40 at least comprises a second half pipe portion 401 which is open upwards, wherein the radial cross sections of the first half pipe portion 301 and the second half pipe portion 401 are arc-shaped, C-shaped, semicircular or semi-elliptical, as shown in fig. 2, when the second housing member 40 is connected with the first housing member 30, the first half pipe portion and the second half pipe portion form a sealing connection, thereby forming the insertion pipe body portion of the insertion pipe structure. By forming the insert tube structure in this manner, the manufacturing process of the insert tube integrated air filter housing portion 50 or housing is greatly simplified, in which case, the first housing member 30 and the second housing member 40 can each be an injection molded one-piece structure, and the required length of the insert tube can be effectively ensured as required without any restriction in the arrangement or length of the insert tube due to the limitation of manufacturing conditions. According to the embodiment shown in fig. 1 and 2, the first half pipe portion 301 and the second half pipe portion 401 are connected by means of an up-and-down joint. In a further embodiment, the first half pipe portion 301 and the second half pipe portion 401 can be connected in a left-right engagement, in which case the first half pipe portion 301 and the second half pipe portion 401 are relatively left-right open structures.

In addition, as shown in fig. 1 and 2, the first half pipe portion 301 of the first housing member 30 of the air cleaner housing portion 50 is formed by a portion of the bottom wall of the first housing member 30 bulging upward, i.e., the first half pipe portion 301 itself is a portion of the bottom wall of the first housing member 30, which effectively ensures that the first half pipe portion 301 is integrally formed with the first housing member 30. In the embodiment shown in fig. 1 and 2, the second housing piece 40 is connected to the first housing piece 30 from the bottom of the first housing piece 30. In a further embodiment, the second housing part 40 can be connected to the first housing part 30 at the side of the first housing part 30 such that the first half pipe section 301 and the second half pipe section 401 are brought into engagement with each other.

As shown in fig. 1 and 2, the insertion tube structure includes, in order in the air intake direction, a tubular mouthpiece portion 402 and an insertion tube body portion formed by the interconnection of the upper first half tube portion 301 and the second half tube portion 401. Wherein the tubular interface 402 forms the initial inlet duct of the insert tube structure, the inlet of the tubular interface 402 forms the inlet of the insert tube structure, and as shown, the tubular interface 402 is arranged beyond the bottom edge of the first housing part 30 for connection and communication with an external inlet component, such as an air filter inlet duct, for air entering the air filter 1 via the insert tube structure. In addition, as shown in fig. 1 and 2, the tubular connection 402 is of one-piece construction with the second half pipe portion 401, wherein the tubular connection 402 comprises a first half pipe portion directly connected to the second half pipe portion 401, and a second half pipe portion 404 which is open beyond the second half pipe portion 401 in the radial direction, the second half pipe portion 404 being connected at its rear end in the air intake direction to the first half pipe portion 301, as can also be seen in fig. 3 below. In another embodiment, the tubular connection 402 can be formed as a single piece with the first half pipe portion 401, in which case the tubular connection 402 likewise has a half pipe portion that extends beyond the opening of the first half pipe portion 401 and is connected to the second half pipe portion 401.

In the embodiments shown in fig. 1 and fig. 2, and fig. 3 below, the rear end of the half pipe portion of the tubular interface 402 along the air intake direction is formed as a first beveled end 405, the front end of the first half pipe portion 301 or the second half pipe portion 401 along the air intake direction is formed as a second beveled end which is connected with the first beveled end 405 in an adapting manner, the adapting connection means that the first beveled end 405 and the second beveled end are inclined in the same direction to ensure that a connection can be formed therebetween, as shown in the drawings, both the first beveled end 405 and the second beveled end are inclined from bottom to top toward the air intake side of the insert pipe structure, and the first beveled end 405 and the second beveled end form a connecting seam which is inclined from bottom to top toward the air intake side of the insert pipe structure. In this case, the connection of the tubular interface 402 to the first half-pipe portion 401 can be advantageously achieved.

In addition, as shown in fig. 1 and 3, a first flange portion 406 extending outward in the direction of inclination of the first bezel end 405 is integrally provided on the outside of the half pipe portion 404 at the position of the first bezel end, a second flange portion 303 extending outward in the direction of inclination of the second bezel end is provided on the outside of the first half pipe portion 301 or the second half pipe portion 401 at the position of the second bezel end 405, and the first flange portion 406 and the second flange portion 303 are connected to each other. By interconnecting the first flange part 406 continuing to extend from the first beveled end 405 and the second flange part 303 continuing to extend from the second beveled end, and the first flange part 406 and the second flange part 303 are both located outside the bottom edge of the first shell member 30, i.e. the first flange part 406 and the second flange part 303 form a connection outside the bottom edge of the first shell member, tool operation, such as operation of a welding tool, is facilitated, and influence on the sealing performance of the connection between the first shell member 30 and the second shell member 40 caused by inconvenience of using the tool at the bottom of the first shell member 30 is avoided.

In the present embodiment, the first and

second housing members

30 and 40 are connected by welding, and specifically, the first and

second housing members

30 and 40 are connected by welding between the first beveled end of the tubular interface portion 402 and the second beveled end of the first half pipe portion 301, between the second half pipe portion 401 and the first half pipe portion 301, and between the upper edge of the cavity portion 402 and the edge of the opening 302 and the enlarged portion, to form an insertion pipe structure having a good sealing property. Preferably, the welding connection is implemented through a vibration friction welding mode, so that the side face of the insertion tube structure cannot leak air, the sealing effect is good, and the noise reduction effect is good.

In addition, as shown in fig. 1 and fig. 2, the second housing member further includes a cavity portion connected to the second half pipe portion and extending in a direction away from the bottom of the first housing member, the bottom wall of the first housing member is provided with an opening at an inner end position close to the first half pipe portion, and the cavity portion is correspondingly connected to the opening and communicated with the insertion pipe structure and the inside of the first housing member. An expansion part which protrudes outwards and is used for being matched with the cavity part is formed at the position, corresponding to the cavity part, of the side wall of the first shell part. The opening is arranged close to the expansion part, the lower end edge of the expansion part is connected with part of the edge of the cavity part, and other edge parts of the cavity part are connected with the opening. The cavity in the cavity part forms an expansion cavity, and if the air enters from the insertion pipe structure, the air in the expansion cavity can generate resonance for noise attenuation under the transmission of vibration sound waves, so that the noise is reduced to a certain degree. In the present invention, the air intake direction refers to a flow direction of air entering the housing portion through the insertion tube, the front side refers to a position or a direction in which a fluid passes first, and the rear side refers to a position or a direction in which a fluid passes later.

The invention also discloses an air filter shell assembly and an air filter 1 thereof. Fig. 3 is a schematic longitudinal sectional view showing the air filter 1 of the present invention, fig. 4 is a schematic perspective view showing the air filter 1 of the present invention in an assembled state, and fig. 5 is an exploded schematic view showing the air filter 1 of the present invention. As shown in fig. 3 to 5, the air cleaner 1 includes an air cleaner housing assembly and a filter element 20 disposed in the air cleaner housing assembly, and the air cleaner housing assembly includes an air cleaner housing portion 50 and a second air cleaner housing portion 10 connected to an upper portion of a first housing member 30 of the air cleaner housing portion 50, wherein the second air cleaner housing portion may be embodied as an air cleaner cover, the second air cleaner housing portion 10 is connected to the air cleaner housing portion for forming a cavity for accommodating the filter element 20, and the second air cleaner housing portion 10 has an air outlet pipe 60 for allowing air flowing into the inside of the air cleaner housing portion from an insertion pipe structure to flow out, i.e., air flowing into the inside of the air cleaner housing portion through the insertion pipe structure flows out of the air cleaner 1 from the air outlet pipe of the second air cleaner housing portion 10 after passing through the filter element 20. In the air filter housing assembly, the second air filter housing 10 and the air filter housing 50 are connected together by bolts, tapping screws or hinges, i.e., wrenches, to form a three-piece air filter, i.e., three pieces, i.e., the second air filter housing 10 of the air filter, the first housing member 30 of the air filter housing, and the second housing member 40 of the air filter housing.

In addition, as shown in fig. 3, after the second housing member 40 is connected to the bottom of the first housing member 30, an insertion tube structure 501 partially located inside the housing portion is formed, and in addition, the second housing member 40 further includes a tubular interface portion 402 connected to the air inlet side of the second half-tube portion 401 and a cavity portion 403 connected to the air outlet side of the second half-tube portion 401 and extending away from the bottom of the first housing member 30, as shown in fig. 1 and 2, wherein, as shown in fig. 1-3, the tubular interface portion 402 is an annular interface, and the other side of the tubular interface portion facing away from the air inlet side of the tubular interface portion is in fit connection with the air inlet end of the first half-tube portion 301, and the tubular interface portion 402 is disposed beyond the bottom edge of the first housing member 30, which facilitates the connection with the external air filter air inlet tube. In addition, as shown in fig. 1, the bottom wall of the first casing member 30 is provided with an opening 302 at a position near the inner end of the first half pipe 301, and as shown in fig. 3, a cavity portion 403 is connected to the opening 302 in a form-fitting manner and communicates with the air outlet of the insertion pipe structure 501. By providing the opening 302, the inner cavity of the cavity portion 403 forms an expansion cavity structure with noise elimination and reduction functions, so as to further improve the attenuation of the air cleaner and reduce the intake noise of the engine.

The air filter housing 50, the air filter housing assembly and the air filter 1 thereof of the present invention form the insert pipe structure 501 by the connection of the first housing member 30 of the housing portion and the second housing member 40 of the housing portion, so that it is possible to integrate the insert pipe in the air cleaner. The insertion pipe becomes a part structure in the air filter from the physical structure, but the insertion pipe is equivalent to an extension part of the air filter inlet pipe from the acoustic perspective, namely, the equivalent length of the air filter inlet pipe is extended. Under the condition that the average cross-sectional area of the air filtering inlet pipe and the volume of the air filter are not changed, the resonance frequency of the air filter can be further reduced, and therefore the performances of attenuation of the air filter and reduction of the air inlet noise of the engine are improved.

In addition, with the implementation of new energy strategy in China, the market share of new energy automobiles is continuously improved, wherein Hybrid Electric Vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs) have two sets of power systems of engines and motors at the same time, the available space in an engine compartment is smaller than that of the traditional automobile, and the space which belongs to an air filter on the traditional automobile originally is partially occupied by the motors, so that the volume V of the air filter is reduced, the resonance frequency of the air filter is increased, and the performances of reducing the attenuation of the air filter and the intake noise of the engine are reduced. Through integrated insert tube in air cleaner, prolonged the effective length of empty intake pipe of straining, under the limited condition of air cleaner V, also make air cleaner resonance frequency low enough, satisfy the decay, reduce hybrid vehicle and insert the requirement of electric formula hybrid vehicle engine noise of admitting air.

In addition, the invention also discloses an air filter system which comprises the air filter and an air filter air inlet pipe which is connected with the air filter and used for allowing air to enter the air filter. The air inlet pipe is connected with the insert pipe structure of the air filter, the air from the air inlet pipe enters the air filter through the insert pipe structure, and the air entering the inside of the air filter housing part through the insert pipe structure flows through the filter element 20 and then flows out of the air filter from the air outlet pipe 60 of the second air filter housing part 10.

It should be noted that the features of the different exemplary embodiments of the invention may be combined with each other in any way without departing from the scope of protection of the invention, as long as these features are not mutually exclusive.

Claims

1. An air filter housing part comprising an insert tube structure, which is a component of a housing of an air filter (1), characterized in that the air filter housing part comprises a first housing part (30) and a second housing part (40) arranged in connection with the first housing part (30), and further comprises an insert tube structure formed by the second housing part (40) in connection with the first housing part (30) and located at least partially inside the housing part.

2. An air cleaner housing part including an insert tube arrangement according to claim 1 wherein the insert tube arrangement is a straight tube arrangement extending into the housing part in the air intake direction.

3. The air filter housing part comprising an insert tube arrangement according to claim 1, characterized in that the first housing part (30) is provided with a first half tube part (301) and the second housing part (40) comprises at least a second half tube part (401), the insert tube arrangement comprising at least an insert tube body part formed by the mutual connection of the first half tube part (301) of the first housing part (30) and the second half tube part (401) of the second housing part (40).

4. The air filter housing part including an insert pipe structure according to claim 3, wherein the first half pipe portion (301) is formed by a portion of a bottom wall of the first housing member (30) bulging upward, and the second housing member (40) is connectively provided to a bottom of the first housing member (30).

5. An air filter housing part comprising an insert tube structure according to claim 3, characterised in that the insert tube structure further comprises a tubular interface part (402) for communication with an external air inlet part, the tubular interface part (402) and the insert tube body part being arranged in series in the air inlet direction.

6. An air filter housing part comprising an insert tube arrangement according to claim 5, characterized in that the tubular interface portion (402) is arranged beyond a bottom edge of the first housing part (30).

7. An air filter housing part comprising an insert tube arrangement according to claim 5, c h a r a c t e r i z e d in that the tubular interface part (402) is provided integrally with one of the first half tube part (301) and the second half tube part (401), and that the tubular interface part (402) has a half tube part (404) which in its radial direction exceeds the opening of the first half tube part (301) or the second half tube part (401) provided integrally therewith, and that the tubular interface part (402) is connected to the other of the first half tube part (301) and the second half tube part (401) via the half tube part (404).

8. An air filter housing part including an insert tube arrangement according to claim 7, c h a r a c t e r i z e d in that the end of the half tube portion (404) of the tubular interface part (402) facing away from the air inlet side is an obliquely arranged first bevelled opening (405), and that the connecting end of the first half tube portion (301) or the second half tube portion (401) to the half tube portion (404) is a second bevelled opening adapted to and interconnected with the first bevelled opening (405).

9. An air filter housing part including an insert pipe structure according to claim 8, c h a r a c t e r i z e d in that said half pipe portion (404) is further integrally provided at the location of the first bevelled opening (405) with a first flange portion (406) extending outwardly in a direction of inclination of the first bevelled opening (405), said first half pipe portion (301) or said second half pipe portion (401) being provided at the location of the second bevelled opening with a second flange portion (303) extending outwardly in a direction of inclination of the second bevelled opening, said first flange portion (406) and said second flange portion (303) being interconnected.

10. An air filter housing part including an insert tube arrangement according to claim 9, characterized in that the first flange part (406) and the second flange part (303) each extend beyond the bottom edge of the first housing part (30).

11. An air filter housing part including an insert tube structure according to claim 3, C-shaped or semi-elliptical in radial cross-section of the first half tube part (301) and the second half tube part (401).

12. The air filter housing part including an insert pipe structure according to claim 3, wherein the second housing member (40) further includes a cavity part (403) connectively disposed at a rear side of the second half pipe part (401) in an air intake direction and extending away from a bottom of the first housing member (30), the bottom wall of the first housing member (30) is provided with an opening (302) at a position close to an inner end of the first half pipe part (301), and the cavity part (403) is correspondingly connected to the opening (302) and communicates with the insert pipe structure and an inside of the first housing member (30).

13. An air filter housing part including an insert tube structure according to claim 12, characterized in that the side wall of the first housing part (30) is formed with an outwardly protruding receptacle for mating with the cavity part (403) at a position corresponding to the cavity part (403).

14. An air filter housing portion including an insert tube structure according to any one of claims 1-13 wherein: the first housing part (30) and/or the second housing part (40) are of injection-molded one-piece construction.

15. An air filter housing portion including an insert tube structure according to any one of claims 1-13 wherein: the first housing part (30) and the second housing part (40) are connected by means of a vibration friction welding.

16. An air filter housing assembly, characterized by comprising an air filter housing part according to any one of claims 1-15 and a second air filter housing part (10), the second air filter housing part (10) being connected to the air filter housing part for forming a cavity for accommodating a filter element (20).

17. An air filter housing assembly according to claim 16, wherein the second air filter housing part (10) has an air outlet duct (60) for the outflow of air flowing from the insert tube structure into the interior of the air filter housing part.

18. An air filter, characterized by comprising an air filter housing assembly according to claim 16 or 17 and a filter element (20) arranged within the air filter housing assembly, the filter element (20) being located within a cavity formed by an air filter housing part and a second air filter housing part (10) of the air filter housing assembly.

19. An air filter according to claim 18, wherein air entering the interior of the air filter housing portion via the insert tube arrangement passes through the filter element (20) and exits the air filter from the air outlet duct (60) of the second air filter housing portion (10).

20. An air filter system, characterized in that it comprises an air filter according to claim 18 or 19 and an air filter inlet duct connected to the air filter for the entry of air into the air filter.

21. The air filter system according to claim 20, wherein the air filter inlet pipe is in communication with an insert pipe structure of the air filter.