CN113123846A

CN113123846A - Blow-by gas filter assembly having shaft with locking insert

Info

Publication number: CN113123846A
Application number: CN201911397613.2A
Authority: CN
Inventors: 乔基奥·基隆迪
Original assignee: SHANGHAI OUFEI FILTER CO Ltd
Current assignee: SHANGHAI OUFEI FILTER CO Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-16

Abstract

The invention relates to a blow-by gas filter assembly (1) fluidly connected to a crankcase ventilation circuit of an internal combustion engine. The filter assembly (1) has an axis (X-X) and comprises a filter group (3), the filter group (3) having a hollow cylindrical shape with a central chamber (300), the central chamber (300) being radially traversable by the blow-by gas, preferably from the outside to the inside. Furthermore, the filtering assembly (1) comprises a support and control member (4) engageable to the filter group (3), the support and control member (4) being adapted to support the filter group (3) in an axial position along an axis X-X and to control the rotation of the filter group (3) about said axis (X-X) to perform the filtering operation. The member (4) and the filter group (3) each comprise a locking crown (510) and a locking ring (310) specially shaped to fit each other. Furthermore, the blow-by gas filter assembly (1) comprises a locking insert (7), the locking insert (7) being radially insertable with respect to the (X-X) axis via a locking crown (510) and a locking ring (310) to perform the mutual locking of the filter group (3) to the member (4).

Description

Blow-by gas filter assembly having shaft with locking insert

Technical Field

The invention relates to a blow-by gas filter assembly.

In particular, the blow-by gas filter assembly of the present invention may be fluidly connected to a crankcase ventilation circuit of an internal combustion engine within a vehicle to receive blow-by gas (from the crankcase) and filter suspended particles contained therein from the blow-by gas.

In particular, "blow-by" means oil and gas that is vented from the crankcase of the internal combustion engine during operation of the internal combustion engine. Specifically, the blow-by gas has a composition similar to that of the exhaust gas, and is produced by combustion of an air/fuel mixture in the combustion chamber. These gases pass by the cylinder and carry with them carbon particles and oil droplets, leaking into the lower part of the crankcase, rather than reaching the waste drain circuit. In the present discussion, for simplicity, blow-by gas is considered to include air and suspended particles; the suspended particles comprise oil droplets and/or carbon particles.

Background

In the prior art, solutions of filter assemblies fluidly connectable to a crankcase and adapted for exhausting suspended particles from blow-by gas are known.

In particular, known solutions of blow-by gas filter assemblies that separate undesired suspended particles from the aforementioned blow-by gas comprise filter groups having such a purpose.

In the prior art, various embodiments of filter assemblies are known comprising a filter group containing a porous type of filter medium, driven in rotation by a specially shaped support and control member, so as to separate the suspended particles from the air by passing through the porous material and by the action of centrifugal force.

In fact, solutions are known in the prior art in which said support and control means comprise a control drive of the mechanical type, for example connected to a rotating element of the vehicle, such as the crankcase of the engine, or of the electrical type, comprising a specific electric motor.

Such embodiments typically have complex shapes, particularly in the connection method between the filter group and the control element. In particular, the coupling of such an embodiment on two components (or groups of components) is complex: this involves in particular complex assembly (disassembly) operations and involves a certain risk of angular displacement in the rotation operations of the filter group.

Disclosure of Invention

Therefore, the need is strongly felt in the aforementioned prior art for a blow-by gas filter assembly having a solution to the aforementioned problems, which is simple in shape and in particular in the way of the mutual coupling of the filter group and the support and control member.

The object of the present invention is to provide a new embodiment of a blow-by gas filter assembly that meets the requirements.

Such object is achieved by a blow-by gas filter assembly as claimed in claim 1. The dependent claims show variants of preferred embodiments which may have further advantageous aspects.

Drawings

In any case, further characteristics and advantages of the invention will be ascertained from the description of preferred embodiments thereof given below, by way of non-limiting example, with reference to the accompanying drawings, in which:

FIG. 1a shows a perspective view of separate parts of a blow-by gas filter assembly according to the present invention, according to a preferred embodiment;

FIG. 1b shows a cross-sectional view of the assembled blow-by gas filter assembly as in FIG. 1 a;

FIG. 2 shows a perspective view of separated parts of some components of the blow-by gas filter assembly in FIG. 1 a;

FIG. 3 shows a longitudinal cross-sectional side view of FIG. 2;

FIG. 3a shows a cross-sectional view of the components of FIG. 3 assembled to each other;

FIG. 4a shows a perspective view of separated parts of a blow-by gas filter assembly according to the present invention according to another preferred embodiment;

FIG. 4b shows a cross-sectional view of the assembled blow-by gas filter assembly as in FIG. 4 a;

FIG. 5 shows a perspective view of separated parts of some components of the blow-by gas filter assembly in FIG. 4 a;

FIG. 6 shows a side view of the longitudinal cross-section of FIG. 5;

fig. 6a shows a cross-sectional view of the components as in fig. 6 assembled to each other.

Detailed Description

Referring to the drawings, reference numeral 1 denotes a blow-by gas filter assembly adapted to perform a filtering/separating action on particles (liquid and/or solid) suspended in a gas flow.

The blowby gas filter assembly 1 may be fluidly connected to a crankcase ventilation circuit of an internal combustion engine of a vehicle to receive blowby gas and filter suspended particulates contained therein from the blowby gas, returning a clean (i.e.: filtered) flow of gas to other vehicle systems, such as, for example: back to the engine intake circuit in communication with the combustion chambers of the internal combustion engine.

Preferably, the blow-by gas filter assembly is directly mountable to a crankcase of an internal combustion engine of a vehicle. In particular, the invention is not limited to this feature; the blow-by gas filter assembly 1 may be configured as a stand-alone device including respective inlet and outlet ports, the inlet port communicating with the crankcase (to receive blow-by gas to be filtered) and the outlet port communicating with the intake circuit (to recirculate the gas stream filtered of solid and liquid particles to the combustion chamber).

According to the invention, the filter assembly 1 comprises an X-X axis about which the following components extend or are positioned.

According to a preferred embodiment, the blow-by gas filter assembly 1 comprises a body 2. As described broadly below and as can be determined from the figures appended below, preferably other components of the system are located in or on said body 2.

Specifically, the main body 2 includes a filter chamber 20, and a blow-by gas filtering/separating operation occurs in the filter chamber 20. The filter chamber 20 is thus fluidly connected to a crankcase ventilation circuit of an internal combustion engine of the vehicle to receive dirty blow-by gas, i.e. blow-by gas comprising suspended particles (solids and/or liquids), and to an engine air intake system to reintroduce clean blow-by gas, i.e. blow-by gas cleaned of suspended particles, into the system.

According to a preferred embodiment, the body 2 comprises respective blow-by gas inlets and outlets.

Preferably, the main body 2 comprises an inlet mouth 21 fluidly connected with the crankcase ventilation circuit of the vehicle to receive the blow-by gas to be filtered. Preferably, the inlet nozzle is configured (made) substantially parallel to an X-X axis spaced therefrom. Preferably, said inlet mouth is configured on a side wall of the body 2. Preferably, said inlet mouth is made on the wall of the body 2 defining the filtering chamber 20.

Furthermore, the body 2 comprises an outlet mouth 22. Preferably, the outlet mouth 22 is configured to be positioned on the X-X axis. Preferably, the outlet mouth 22 is perpendicular to said X-X axis. Preferably, the outlet mouth 22 is coaxial with the X-X axis.

The outlet mouth 22 is delimited laterally, annularly, by an outlet edge 220.

According to a preferred embodiment, from the outlet mouth 22, the body 2 provides an outlet connection which is engaged with an engine intake circuit communicating with the combustion chambers of the internal combustion engine of the vehicle. According to a preferred embodiment, the outlet connection communicates with an outlet opening to the crankcase of the combustion engine, which is configured on a coupling flange of the body 2.

Furthermore, according to a preferred embodiment, the body 2 comprises an assembly opening 25, through which assembly opening 25 the components described below can be inserted into the body 2, preferably into the filter chamber 20. Preferably, the assembly opening 25 is configured in a position opposite the outlet mouth 22. Preferably, the assembly opening 25 is configured along the X-X axis with an extension (orientation) transverse to the X-X axis, preferably a vertical extension.

According to the invention, the blow-by gas filter assembly 1 comprises a filter group 3, particularly suitable for performing said filtering/separating operation of particles suspended in the blow-by gas. The filter group 3 is positionable and operates in a filtering chamber 20.

The filter group 3 extends along an axis X-X, the filter group 3 having a hollow cylindrical shape, in fact comprising a central chamber 300.

The filter group 3 may be radially penetrated by the blow-by gas. Preferably, the filter group 3 may be traversed by the blow-by gas from the outside towards the inside in the radial direction.

Preferably, the inlet mouth faces radially towards the filter group 3. According to a preferred embodiment, the inlet mouth faces radially towards the outer surface of the filter group 3.

Preferably, said outlet mouth 22 faces axially towards the central chamber 300.

In other words, in the filter chamber 20, the filter group 3 determines a dirty side in which blowby gas to be filtered is present and a clean side in which blowby gas has been filtered. Preferably, the outlet mouth 22 is in fluid connection with the clean side.

According to a preferred embodiment, the central chamber 300 of the filter group surrounds the clean side where filtered blow-by gas is present and is in fluid communication with the outlet mouth 22.

According to a preferred embodiment, the filter group 3 comprises a filter medium 30. The filter media 30, which may be radially traversed, comprises a nonwoven fabric pleated in the form of a star or a porous cylindrical membrane.

Furthermore, according to a preferred embodiment, the filter group 3 comprises a first filter plate 31 and a second filter plate 32, which are reciprocally arranged at the ends of the filter medium 30.

Preferably, the filter group 3 comprises a first filter plate 31 and a second plate 32 mutually joined to the ends of the filter medium 30.

Furthermore, according to a preferred embodiment, the filter group 3 comprises a central structure 33, which central structure 33 is housed inside the filter medium 30 and joins the two

filter plates

31, 32, so that the

filter plates

31, 32 are integrally rotatably connected. Preferably, said central structure 33 has one or more through openings (through opening) suitable for allowing the passage of the fluid being filtered.

According to a preferred embodiment, said central structure 33 is configured to be integrally formed with the first filter plate 31. Furthermore, according to a preferred embodiment, the filter group 3 comprises an outer structure 34, the outer structure 34 surrounding the filter medium 30 on the outside and joining the two

filter plates

31, 32. Preferably, the outer structure 34 has a plurality of through openings adapted to allow the passage of the fluid being filtered.

According to a preferred embodiment, said central structure 33 is configured to be integrally formed with the second filter plate 32.

According to a preferred embodiment, said central structure 33 is a tubular body having one or more through openings engaging with the

filter plates

31, 32.

As shown in the figures, the central chamber 300 extends through the

filter plates

31, 32 surrounded by the filter media 30. According to a preferred embodiment, the central chamber 300 extends through respective through

openings

318, 328 configured on the

filter plates

31, 32. Preferably, the

openings

318, 328 are concentric with the X-X axis as is the central chamber 300.

Furthermore, according to the invention, the filtering assembly 1 comprises a support and control member 4 engageable with the filter group 3, the support and control member 4 being suitable for supporting the filter group in an axial position along the X-X axis and for controlling the rotation of the filter group about said X-X axis in order to perform the filtering operation.

In other words, said supporting and control means 4 are a component or group of components adapted to receive or generate a rotating action on the filter group 3 to guide the filter group in rotation.

According to a preferred embodiment, said support and control means 4 comprise a control drive 6, the control drive 6 being operatively connected to the filter group 3 to control the rotation of the filter group about the X-X axis.

Preferably, said control drive 6 is of the electrical or mechanical or electromechanical type.

According to a preferred embodiment, the control drive 6 is connected to an external group included in the vehicle, for example: a camshaft.

According to another preferred embodiment, the control drive 6 comprises an electric motor pack 60, which electric motor pack 60 comprises a rotor 61 and a stator 62. Electromagnetic driving of the stator 62 causes the rotor 61 to rotate about the X-X axis. According to a preferred embodiment, the electric motor group 60 is of the electric type, preferably brushless.

According to a preferred embodiment, the rotor 61 comprises one or more elements of ferromagnetic material arranged in a ring shape.

Furthermore, preferably, the supporting and control means 4 comprise a closing cover 10 tightly fitted on the main body 2. Preferably, the closure cap 10 sealingly engages the body 2 to close a module opening 25 provided on the body. Preferably, the closure lid 10 supports the electric motor group 60. Preferably, the closure cap 10 is mountable to the body 2 along an axial direction. Preferably, the closing cap is fixed to the body 2 by means of a screw with a bushing or a self-tapping screw.

According to a preferred embodiment, the electric motor group 60 comprises an electric board housed on the closure lid 10. Said electric board is electrically connected to the vehicle control unit by means of an electronic connection integrated on the closure cap 10.

According to the invention, the member 4 and the filter group 3 respectively comprise a locking crown 510 and a locking ring 310 specially shaped to fit each other.

Furthermore, again according to the invention, the blow-by gas filter assembly 1 comprises a locking insert 7, the locking insert 7 being radially insertable with respect to the X-X axis via a locking crown 510 and a locking ring 310 to perform the mutual locking of the filter group 3 to the member 4.

In other words, the member 4 and the filter group 3 are mutually rotatably connected by said insert 7.

In other words, the engagement between the locking crown 510 and the locking ring 310 by the insert 7 determines an "integral" coupling between the two components, so that the control member 4 and the filter group 3 are mechanically ("integrally") connected to rotate in unison (or synchronously).

According to a preferred embodiment, the support and control member 4 comprises a shaft 5.

Such a shaft 5 is a hollow body extending along the X-X axis and is specifically designed to be operatively connected to the filter group 3 and to the control drive 6.

Preferably, the shaft 5 is a hollow body constructed as a single part.

According to an alternative embodiment, the shaft is a hollow body consisting of two or more parts mechanically coupled to each other reversibly or irreversibly (for example by welding, mechanical coupling, screws or the like), so as to form a single component whose constituent parts rotate synchronously according to the commands controlling the driver 6.

The shaft 5 in fact comprises a control portion 56 coupled to the control drive 6 and a filter portion 53 coupled to the filter group 3.

The shaft 5 in fact comprises a control portion 56 coupled to the control drive 6 and a filter portion 53 on which the filter group 3 is housed.

Preferably, the rotor 61 is accommodated on the control portion 56. In particular, the rotor 61 and the filter group 3 are respectively integrally mounted on the shaft 5, respectively on the control portion 56 and on the filter portion 53, in such a way that the controlled rotation of the rotor 61 corresponds to the rotation of the shaft 5 and therefore of the filter group 3. In particular, in the present description, "integral" means that the control drive 6 and the filter group 3 are mechanically connected to the shaft 5 so as to rotate in unison (or synchronously).

Thus, according to a preferred embodiment, a locking crown 510 is configured on said shaft 5.

According to a preferred embodiment, the filter group 3 is particularly shaped to house said locking crown 510.

Preferably, the locking crown 510 is positioned radially distal to the X-X axis and the locking ring 310 is positioned in a complementary manner to engage and receive the locking crown 510.

Preferably, therefore, as shown in the figures provided by way of example, the insert 7 passes radially first through the locking ring 310 and then through the locking crown 510.

According to an alternative embodiment, the locking crown 510 is positioned radially distal to the X-X axis, and the locking ring 310 is positioned in a complementary manner to engage said locking crown 510 and to keep said locking crown 510 housed inside.

Thus, preferably, in such a preferred embodiment, the insert 7 radially passes first through the locking crown 310 and then through the locking ring 310.

According to a preferred embodiment, the locking crown 510 includes a crown window 511 and the locking ring 310 includes a ring window 311. The inserts 7 are specially shaped to extend through said windows (positioned in angular alignment with each other).

According to a preferred embodiment, the locking insert 7 is snap-lockable (snap-lockable).

Preferably, the locking insert 7 is snap-lockable to the locking crown 510.

According to a preferred embodiment, the locking insert 7 comprises at least two elastically curved teeth 71, the at least two elastically curved teeth 71 being adapted to engage the crown window wall 511.

Preferably, the elastically yielding teeth 71 are mutually arranged so as to be situated and active in two axially opposite directions to each other. Whereby each tooth operates in a respective direction parallel to the X-X axis.

An exemplary embodiment of an insert of this type is shown in fig. 2, 3 and 3 a.

In other further embodiments, the locking insert 7 is screw-lockable, the locking insert 7 comprising a dedicated threaded insert portion 72 and a locking portion 73 adjacent thereto.

Preferably, the threaded insert portion 72 may be screwed to the threaded wall defining the annular window 311. Preferably, the locking portion 73 axially adjacent the threaded insert portion 72 extends in length through the crown window 311.

According to a preferred embodiment, the insert 7 comprises a shoulder between the threaded insert portion 72 and the locking portion 73. Preferably, the shoulder thereby acts as an end stop for tightening the insert. In other words, preferably, the shoulder defines a fastening stop of the insert and thus an associated fastening torque.

According to some embodiments, the blow-by gas filter assembly 1 comprises a plurality of locking inserts 7, the plurality of locking inserts 7 preferably being positioned at an angular average spacing from each other.

According to a preferred embodiment, the filter group 3 sealingly engages the member 4, preferably the shaft 5, in two distinct axial sealing zones.

Preferably, the two sealing areas are adjacent to the first filter plate 31 and the second filter plate 32.

According to a preferred embodiment, the filter group 3 comprises a second gasket 325 and a first gasket 315 suitable for engaging with the shaft 5.

According to a preferred embodiment, the shaft 5 comprises an air slit 500, axially positioned between the two sealing areas. The air slit 500 is adapted to place the air passageway 50 in fluid communication with the central chamber 300.

According to a preferred embodiment, there are a plurality of slits 500 and they are positioned angularly equidistant from each other.

As shown in the drawings, according to a preferred embodiment, the filter portion 53 comprises an air passage 50 therein, preferably an outlet for filtered blow-by gas, in which said outflow of filtered blow-by gas takes place towards the outlet mouth 22. In other words, the shaft 5 is a hollow body whose cavity at least partially forms the filtered blow-by air passage 50.

In other words, the air passage 50 connects the clean side of the filter group 3 to the outlet mouth 22. In still other words, the blow-by gas that has undergone the filtering operation flows out into the air passage 50.

Preferably, the air channel 50 fluidly connects the central chamber 300 of the filter group 3 to the outlet mouth 22.

According to a preferred embodiment, the filter portion 53 is fluidly connected to the central chamber 300 and the outlet mouth 22 to allow filtered blow-by gas to flow out.

Preferably, the shaft 5 comprises a channel outlet 522, which channel outlet 522 fluidly connects the interior of the air channel 50 and the outlet mouth 22. Preferably, the passage outlet 522 is positioned at an axial end of the shaft 5. Preferably, the passage outlet 522 is positioned at the outlet mouth 22. Preferably, the channel outlet 522 is placed on the shaft 5 at the end of the filter portion 53. Preferably, the passage outlet 522 is positioned on the shaft 5 at an axial end of the filter portion 53 remote from the control portion 56. Preferably, the passage outlet 522 is obtained on the control portion 56. Preferably, the passage outlet 522 is placed on the shaft 5 at an axial end of the control portion 56. Preferably, the passage outlet 522 is positioned on the control portion 56 of the shaft 5 in a central axial position close to the filter group 3.

According to a preferred embodiment, the blow-by gas filter assembly 1 comprises a first support bearing 8 keyed on the shaft 5.

According to a preferred embodiment, the blow-by gas filter assembly 1 comprises a second bearing 9 for support, the second bearing 9 being keyed onto the shaft 5.

Preferably, the shaft 5 is positioned along the X-X axis by means of a first bearing 8 and a second bearing 9. Preferably, the axis 5 is aligned with the X-X axis by means of a first bearing 8 and a second bearing 9.

The present invention is not limited to the shape or type of the first and second bearings. Preferably, the term "bearing" refers to a sliding bearing, a ball bearing or a bushing.

According to a preferred embodiment, the first bearing 8 tightly closes the filter chamber 20. Preferably, the first support bearing 7 engages with an outlet edge 220 defining the outlet mouth 22.

According to a preferred embodiment, the first bearing 8 can be positioned on the filter portion 53 in an axial position close to the filter group 3, remote from the control drive 6.

According to a preferred embodiment, the second bearing 9 may be positioned on the control portion 56.

According to a preferred embodiment, the control portion 56 of the shaft 5 is also hollow.

According to a preferred embodiment, the shaft 5 is made of thermoplastic material obtained by means of a single moulding operation.

Preferably, the shaft 5 is made of polyphenylene sulfide (PPS).

Preferably, the shaft 5 is made of polyphenylene sulfide (PPS) type material.

Preferably, the shaft 5 is made of polyphenylene sulphide (PPS) -type material reinforced with glass fibres (PPS + GF15, PPS + GF30, PPS + GF 40).

Preferably, the shaft 5 is made of a nylon-based material (PA, PA 6, PA 6.6or a mixture thereof).

Preferably, the shaft 5 is made of a nylon-like material (PA + GF, PA 6.6+ GF35, PA 6+ PA 6.6+ GF 35) reinforced with glass fibers.

Preferably, the shaft 5 is made of a material comprising a polyamide-based blend (e.g. PPA).

According to a preferred embodiment, the shaft 5 is made of metal. Preferably, the shaft 5 is made of an aluminum alloy.

Originally, the blow-by gas filter assembly of the present invention broadly meets the objects of the present invention by presenting itself in a simple form and with all of the above required simple assembly and disassembly operations.

Advantageously, the engagement between the member and the filter group is definitive and safe.

Advantageously, the risk of the component and the filter group coming out of engagement with each other, for example due to breakage or malfunction, is substantially eliminated.

Advantageously, the component is a multifunctional part. Advantageously, the blow-by gas flows through the support and control member. Advantageously, the filter group is controlled in rotation by the support and control member.

Advantageously, in a preferred embodiment, the support and control member comprises a shaft that is hollow or at least partially configured in a hollow shape, reducing the weight of the filter assembly, the consumption associated with the operation of the filter assembly, and the mechanical stress on the means provided for keeping the filter assembly rotating.

Advantageously, the filter group is simple and safe to fix/remove from the member, thereby facilitating assembly and maintenance of the filter assembly.

Advantageously, the assembly of the filter group and the control member can be uniquely achieved, ensuring the installation of the original cartridge during the staged maintenance operations of the vehicle.

Advantageously, the engagement between the filter group and the control member is achieved by means of an insert, which thereby transmits a sufficient torque between the control member and the filter group.

Advantageously, the coupling between the filter groups is simple and intuitive and allows to reduce the assembly time of the filter assembly and the number of filter maintenance times.

Advantageously, the respective engagement surfaces provided between the filter group and the control member are formed/integrated only on the respective component, thereby reducing the production costs of the assembly and/or of the filter group.

Advantageously, the insert performs a dual function: locking the mutual axial position between the filter group and the control member, and rotationally coupling the components so that they are mechanically integrated for synchronous rotation.

Advantageously, the engagement between the filter group and the control member is achieved by means of an insert which allows the engagement surface between the filter group and the control member to be simplified, thereby simplifying the relative production equipment (such as the mould), reducing costs.

It will be apparent that modifications may be made to the blow-by gas filter assembly by those skilled in the art to meet contingent requirements, all modifications being included within the scope of protection as defined by the following claims.

List of reference numerals:

1 blow-by gas filter assembly

2 main body

20 Filter Chamber

21 inlet nozzle

22 outlet nozzle

220 outlet edge

25 opening of the assembly

3 Filter group

30 filter media

31 first filter plate

32 second filter plate

310 locking ring

311 ring window

315. 325 gasket

318. 328 through opening

33 center structure

34 outer structure

300 center chamber

4 control member

5 shaft

50 air channel

500 air slit

53 Filter part

56 control part

500 air slit

510 locking crown

511 crown window

6 control drive

60 electric motor group

61 rotor

62 stator

7 locking insert

71 elastically curved teeth

72 threaded insert

73 locking part

8 first bearing

9 second bearing

10 closure cap

The X-X axis of rotation.

Claims

1. A blow-by gas filter assembly (1), the blow-by gas filter assembly (1) being fluidly connectable to a crankcase ventilation circuit of an internal combustion engine for receiving blow-by gas and filtering suspended particles contained therein from the blow-by gas, wherein the filter assembly (1) has a bobbin (X-X) and comprises:

-a filter group (3), said filter group (3) extending along an axis (X-X), being hollow cylindrical in shape, having a central chamber (300), said central chamber (300) being radially passable by a blow-by gas, preferably radially passable from the outside to the inside;

-a support and control member (4), said support and control member (4) being engageable to the filter group (3), being adapted to support the filter group in an axial position along an (X-X) axis and to control the rotation of the filter group about said (X-X) axis to perform a filtering operation;

wherein the member (4) and the filter group (3) respectively comprise a locking crown (510) and a locking ring (310), said locking crown (510) and said locking ring (310) being particularly shaped to fit each other;

wherein the blow-by gas filter assembly (1) comprises a locking insert (7), said locking insert (7) being radially insertable with respect to an (X-X) axis via said locking crown (510) and said locking ring (310) to perform the mutual locking of said filter group (3) to the member (4).

2. The blow-by gas filter assembly (1) according to claim 1, wherein a locking crown (510) is positioned radially away (X-X) from the axis, and a locking ring (310) is positioned in a complementary manner to accommodate the locking crown (510).

3. Blowby gas filter assembly (1) according to any of the preceding claims, wherein said locking crown (510) comprises a crown window (511) and said locking ring (310) comprises a ring window (311), said locking insert (7) extending through said ring window (311).

4. Blow-by gas filter assembly (1) according to any one of the preceding claims, characterized in that the locking insert (7) is snap-lockable to the locking crown (510) and/or in the locking ring (310).

5. Blow-by gas filter assembly (1) according to claims 3 and 4, characterized in that said locking insert (7) comprises at least two elastically curved teeth (71) adapted to engage with the wall of the crown window (511).

6. Blowby gas filter assembly (1) according to any of the preceding claims, wherein said locking insert (7) is screw-lockable, comprising a dedicated threaded insert portion (72) and a locking portion (73) axially adjacent thereto.

7. The blow-by gas filter assembly (1) according to claims 3 and 6, characterized in that the threaded insert portion (72) is screwable to a threaded wall defining the ring window (311), wherein the locking portion (73) extends in length through the crown window (511).

8. Blowby gas filter assembly (1) according to any of the preceding claims, comprising a plurality of locking inserts (7), said plurality of locking inserts (7) preferably being positioned at an angular average spacing from each other.

9. Blowby gas filter assembly (1) according to any one of the preceding claims, wherein said support and control member (4) comprises a shaft (5), said shaft (5) extending along an axis (X-X) within said central cavity (300), wherein said shaft (5) comprises a filter portion (53) and a control portion (56), said filter group (3) being mounted on said filter portion (53), said control portion (56) being engaged with a control drive (7) comprised in said member (4) adapted to produce a rotary control action, wherein said locking crown (510) is obtained on the shaft (5), preferably on the filter portion (53).

10. The blow-by gas filter assembly (1) according to claim 9, wherein the filter group (3) sealingly engages the shaft (5) in two different axial sealing zones, preferably comprising a first sealing gasket (315) and a second sealing gasket (325), wherein the shaft (5) comprises an air slit (500), the air slit (500) axially positioning the air channel (50) and the central chamber (300) between the two sealing zones in fluid communication.

11. Blowby gas filter assembly (1) according to any of the preceding claims, wherein the filter group (3) comprises a filter medium (30), a first filter plate (31) and a second filter plate (32), the first filter plate (31) and the second filter plate (32) each being positioned at an end of the filter medium (30), wherein the locking ring (310) is configured on the first filter plate (31) on the opposite side of the side engaging the filter medium (30).

12. Blow-by gas filter assembly (1) according to any one of the preceding claims, wherein the member (4) further comprises a control drive (6), the control drive (6) being adapted to control the rotation of the filter group (3).

13. Blowby gas filter assembly (1) according to claim 12, wherein the control drive (6) comprises an electric motor pack (60), said electric motor pack (60) comprising a rotor (61) and a stator (62), wherein the rotor (61) is engaged to the control portion (56) of the shaft (5).