WO2024150118A1 - A cover for a timing driveline of an internal combustion engine - Google Patents
A cover for a timing driveline of an internal combustion engine Download PDFInfo
- Publication number
- WO2024150118A1 WO2024150118A1 PCT/IB2024/050185 IB2024050185W WO2024150118A1 WO 2024150118 A1 WO2024150118 A1 WO 2024150118A1 IB 2024050185 W IB2024050185 W IB 2024050185W WO 2024150118 A1 WO2024150118 A1 WO 2024150118A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cover
- bushing
- coupling profile
- section
- internal combustion
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 25
- 238000010168 coupling process Methods 0.000 claims abstract description 38
- 238000005859 coupling reaction Methods 0.000 claims abstract description 38
- 230000008878 coupling Effects 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 10
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0068—Adaptations for other accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
- F02F2007/0075—Front covers
Definitions
- the present invention relates to internal combustion engines . More speci fically, the invention concerns a cover for the timing driveline ( so-called “timing case” ) of internal combustion engines , especially longitudinal internal combustion engines .
- timing case The covers for the timing driveline ( so-called “timing case” ) of longitudinal internal combustion engines are currently normally used for providing a plurality of fastening points for various engine accessories .
- a typical example for longitudinal engines is the installation of an air-liquid heat exchanger for the delivery flow of a turbocharger, commonly known as WCAC .
- the use of die cast covers is becoming less and less sustainable , as regards both material consumption and the resources required for the production (primarily for the die casting process ) .
- the use of plastic material is an interesting and sustainable solution .
- the use of plastic material turns out to be unfeasible due to the structural strength requirements : the plastic materials which can be used for this sort of application are not adapted to resist the structural stresses imparted by the accessories , even the lighter ones , connected to the cover .
- the present invention aims at solving the technical problems outlined in the foregoing .
- the obj ect of the present invention consists in providing a cover, for the timing driveline of an internal combustion engine , which is made of a plastic material , while ensuring the possibility of using the cover for fastening one or more accessories .
- FIG. 1 is an orthogonal front view of a cover according to the invention
- FIGS. 2 and 3 are sectional views of a detail denoted by pointers I I and I I I in Figure 1 and in Figure 5 , respectively,
- Figures 4 and 5 are views identical to Figure 1 , but with subsequently added components ,
- Figures 6 to 8 are views corresponding to Figures 1 , 4 , 5 , but showing the cover installed on a crankcase of an internal combustion engine .
- Reference number 1 in Figure 1 generally denotes a cover, particularly for a timing driveline of an internal combustion engine E , according to the invention .
- the cover 1 comprises a body 2 made of polymeric material , preferably polypropylene , and at least one fastening assembly 4 .
- the cover 1 is fastened to a crankcase EBK of an internal combustion engine E , wherein the crankcase comprises one or more cylinders and a wall housing a timing driveline of the internal combustion engine E , the wall being covered by the cover 1 .
- the cover 1 may moreover comprise one or more through-holes ( or ports ) 6 , 8 , 10 , 12 , which house portions of a crankcase EBK of the engine E or rotating shafts carried by the crankcase .
- the hole 6 typically receives a rotating shaft of an oil pump .
- each fastening assembly 4 comprises a bushing 14 , having a longitudinal axis X14 and being embedded in the polymeric material of the body 2 of the cover 1 (preferably by means of comoulding) and including a through-hole 16 ( coaxial with axis X14 ) and a fastening element 18 housed in the through-hole 16 of the bushing 14 and passing through said bushing 14 .
- the fastening element 18 comprises a stem 20 , a first coupling profile 22 at a f irst end of said stem 20 , and a second coupling profile 24 at a second end o f the stem 20 , opposite the first end .
- the first coupling profile 22 and the second coupling profile 24 are arranged on opposite sides of the bushing 14 , wherein the term "opposite" refers to the direction identi fied by axis X14 .
- the first coupling profile 22 is configured to engage a support for an accessory of the internal combustion engine E (which may be either a support separated from the accessory or a support integrated with the accessory)
- the second coupling profile 24 is configured to engage the crankcase EBK of the engine E .
- the first coupling profile 22 is a first thread and the second coupling profile 24 is a second thread, so that on the whole the fastening element 20 defines a double screw .
- the fastening element 20 comprises a shoulder 26 , adj acent to the first coupling profile and configured to abut against a first end A14 of the bushing 14 .
- the shoulder 26 is configured as a radially proj ecting collar, preferably having a hexagonal profile for the coupling to a control wrench .
- the fastening element 20 moreover comprises a radially deformable annular element 28 , fitted on the stem 20 at a position between the shoulder 26 and the second coupling profile 24 , and speci fically arranged close to the second coupling profile 24 , the latter proj ecting nearly completely with respect to a second end B14 of the bushing 14 , opposite the end A14 .
- the radially deformable annular element is made of elastomeric material .
- the bushing 14 comprises a first collar 30 at the first end A14 thereof , and a second collar 32 at a second end B14 thereof .
- the first collar 30 and the second collar 32 proj ect radially outwardly from the bushing 14 .
- At least one of the collars 30 , 32 are in contact with the polymeric material of the body 2 of the cover 1 on a respective circumferential peripheral band C30 , C32 extending along the axis X14 , and on a respective inner annular surface R30 , R32 facing the inner annular surface R30 , R32 of the opposite collar .
- the through- hole 16 comprises a first section 34 and a second section 36 , the first section 36 extending from the end A14 to the second section, and the second section extending from the first section to the second end B14 of the bushing 14 .
- the first section 34 has a diameter D34 smaller than a diameter D36 of the second section 36 .
- Both the diameter of the stem 20 and the diameter of the coupling profile 24 (maximum outer diameter ) are less than both the diameter D34 and the diameter D36 , so as to enable insertion .
- the radially deformable annular element 28 has an undeformed outer diameter D28 greater than the diameter D34 of the first section 34 and les s than the diameter D36 of the second section 36 .
- the fastening element 18 through the bushing 14 by imparting the element 28 a radial deformation, so as to pass section 34 .
- the element 28 is free to return to the undeformed shape , so as to form a shoulder which prevents the fastening element 18 from sliding out of the through-hole 16 ( the sliding in the opposite direction is prevented by the shoulder 26 ) .
- the element 18 becomes an element unlosable from the cover 1 , and therefore the latter can be moved within the assembly plant of the engine E with the fastening elements 18 pre-installed thereon .
- cover 1 made of polymeric material enables the integration of sealing elements which are normally configured as separate components in the known covers of die cast metal material .
- the cover 1 comprises a perimeter edge E4 at which a perimeter sealing element S2 is arranged which i s partly embedded in the polymeric material of the body 2 of the cover 1 and partly protrudes therefrom .
- the perimeter sealing element (which is arranged on the face of the cover 1 opposite the face shown in Figure 1 ) is configured as a cord of bi-inj ected elastomeric material , particularly of EPDM rubber .
- annular sealing element R6 which lines the hole 6 and is partially embedded in the polymeric material of the body 2 of the cover 1 , in such a way as to receive an end o f a rotating shaft , particularly a drive shaft of an oi l pump of the internal combustion engine E .
- the annular sealing element is made of co-moulded PTFE .
- Figures 4 , 5 - and therewith Figures 6 , 7 , 8 - show the application of the cover 1 onto the engine E , and speci fically the fastening of an accessory W to the cover 1 .
- the accessory BC shown in the Figures is a mounting bracket for an air-liquid heat exchanger W, which is used as an intercooler in a turbocharged internal combustion engine , the exchanger being normally denoted by the acronym WCAC .
- each coupling profile 24 is received in a seat EBK_S - preferably a threaded hole - present on the crankcase EBK, and i s tightened in such a way as to achieve a seal between the sealing element S2 and the crankcase EBK .
- the bracket BC is fitted onto the coupling pro files 22 , which pas s through corresponding through-holes on the same bracket BC, and then it is tightened onto the cover 1 by means of nuts , which in turn are tightened onto the coupling profiles 22 .
- the coupling profiles 22 , 24 are preferably configured as threads ; however, in alternative embodiments it is possible to configure the coupling profiles as bayonet elements , or as snap-on pins , or generally as quick-coupling j oints .
- An example of such categories of coupling profiles consists in the snap-on pins available from Bollhdf f® and marketed with the commercial name of SNAPLOC® .
- the heat exchanger W is then fastened at mounting seats Wl , W2 , W3 , W4 present on the bracket BC, the latter being by then already secured on the cover 1 by means of the fastening ass e mb lies 4 .
- the cover 1 is fastened to the crankcase and, generally speaking, to auxiliary assemblies of the engine E ( a pump for cooling liquid and/or a pump for lubricating oil and, depending on the needs , also in additional points beside the points corresponding to the fastening assemblies 4 .
- the cover 1 may comprise a plurality of points for the fastening to the crankcase BK1 , BK2 , BK3 , BK4 , BK5 , a plurality of points for the fastening to an oi l pump 0P1 , 0P2 , 0P3 , 0P4 , and a point for the fastening to a pump for cooling liquid WP1 .
- the cover 1 according to the invention, therefore , it becomes possible to use a polymeric material for the production thereo f , without in any way j eopardi zing the possibility of fastening accessories and external components to the cover 1 and to the crankcase EBK . Moreover, it is possible to provide gaskets and sealing elements which are integrated thereto .
- fastening assemblies 4 as depicted in the Figures , i . e . with a double-screw configuration which is unlosable thanks to the combination of the shoulder 26 , the geometry of the hole 16 and the annular element 28 , it is also possible to improve the plant logistics , by providing a cover 1 having the fastening elements pre-installed thereon, therefore reducing the number of components to be handled in the assembly station of the cover 1 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
There is described a cover (1), in particular for a timing driveline of an internal combustion engine (E), comprising a body (2) made of a polymeric material and at least one fastening assembly (4), said at least one fastening assembly (4) comprising a bushing (14) embedded in the polymeric material of the body (2) of the cover (1) and including a through-hole (16), and a fastening element (18) housed in the through-hole (16) of said bushing (14) and passing through said bushing (14), the fastening element (18) comprising a stem (20), a first coupling profile (22) at a first end of said stem (20), and a second coupling profile (24) at a second end of said stem (20), opposite to the first end, the first coupling profile (22) and the second coupling profile (24) being arranged on opposite sides of said bushing ( 14 ), and further wherein the first coupling profile (22) is configured to engage a support (BC) for an accessory (W) of an internal combustion engine (E), and the second coupling profile (24) is configured to engage a crankcase (EBK) of an internal combustion engine (E).
Description
"A cover for a timing driveline of an internal combustion engine"
★ ★ ★ ★
TEXT OF THE DESCRIPTION
Field of the Invention
The present invention relates to internal combustion engines . More speci fically, the invention concerns a cover for the timing driveline ( so-called "timing case" ) of internal combustion engines , especially longitudinal internal combustion engines .
Known Art
The covers for the timing driveline ( so-called "timing case" ) of longitudinal internal combustion engines are currently normally used for providing a plurality of fastening points for various engine accessories . A typical example for longitudinal engines is the installation of an air-liquid heat exchanger for the delivery flow of a turbocharger, commonly known as WCAC .
This generally requires the presence of a cover of a metal material , generally obtained by means of die casting, basically in order to ensure the properties o f structural strength which are necessary to support the various accessories . Moreover, thi s requires the use o f perimeter seals on the cover and the use of gaskets for rotating members ( such as Corteco®) in order e . g . to enable the passage of the crankshaft portion which drives the oil pump .
However, in order to improve the production ef ficiency, to decrease the costs and, especially, to reduce the environmental footprint of vehicle manufacturing, the use of die cast covers is becoming less and less sustainable , as regards both material consumption and the resources required for the production (primarily for the die casting process ) . In
this regard, the use of plastic material is an interesting and sustainable solution . However, the use of plastic material turns out to be unfeasible due to the structural strength requirements : the plastic materials which can be used for this sort of application are not adapted to resist the structural stresses imparted by the accessories , even the lighter ones , connected to the cover .
Obj ect of the Invention
The present invention aims at solving the technical problems outlined in the foregoing . Speci fically, the obj ect of the present invention consists in providing a cover, for the timing driveline of an internal combustion engine , which is made of a plastic material , while ensuring the possibility of using the cover for fastening one or more accessories .
Summary of the Invention
The obj ect of the invention is achieved by means of a cover and an internal combustion engine having the features set forth in the claims that follow, which form an integral part of the technical disclosure provided herein in relation to the invention .
Brief Description of the Figures
The invention will now be described with reference to the annexed Figures , which are provided by way o f non-limiting example only, and wherein :
- Figure 1 is an orthogonal front view of a cover according to the invention,
- Figures 2 and 3 are sectional views of a detail denoted by pointers I I and I I I in Figure 1 and in Figure 5 , respectively,
- Figures 4 and 5 are views identical to Figure 1 , but with subsequently added components ,
- Figures 6 to 8 are views corresponding to Figures 1 , 4 , 5 , but showing the cover installed on a crankcase
of an internal combustion engine .
Detailed Description
Reference number 1 in Figure 1 generally denotes a cover, particularly for a timing driveline of an internal combustion engine E , according to the invention .
Referring to Figures 1 and 8 , the cover 1 comprises a body 2 made of polymeric material , preferably polypropylene , and at least one fastening assembly 4 . The cover 1 is fastened to a crankcase EBK of an internal combustion engine E , wherein the crankcase comprises one or more cylinders and a wall housing a timing driveline of the internal combustion engine E , the wall being covered by the cover 1 .
The cover 1 may moreover comprise one or more through-holes ( or ports ) 6 , 8 , 10 , 12 , which house portions of a crankcase EBK of the engine E or rotating shafts carried by the crankcase . For example , the hole 6 typically receives a rotating shaft of an oil pump .
Referring to Figures 2 and 3 , each fastening assembly 4 comprises a bushing 14 , having a longitudinal axis X14 and being embedded in the polymeric material of the body 2 of the cover 1 (preferably by means of comoulding) and including a through-hole 16 ( coaxial with axis X14 ) and a fastening element 18 housed in the through-hole 16 of the bushing 14 and passing through said bushing 14 .
The fastening element 18 comprises a stem 20 , a first coupling profile 22 at a f irst end of said stem 20 , and a second coupling profile 24 at a second end o f the stem 20 , opposite the first end . As can be seen in Figures 2 and 3 , the first coupling profile 22 and the second coupling profile 24 are arranged on opposite sides of the bushing 14 , wherein the term "opposite" refers to the direction identi fied by axis X14 .
The first coupling profile 22 is configured to
engage a support for an accessory of the internal combustion engine E (which may be either a support separated from the accessory or a support integrated with the accessory) , while the second coupling profile 24 is configured to engage the crankcase EBK of the engine E .
In preferred embodiments , such as depicted in the Figures , the first coupling profile 22 is a first thread and the second coupling profile 24 is a second thread, so that on the whole the fastening element 20 defines a double screw .
The fastening element 20 comprises a shoulder 26 , adj acent to the first coupling profile and configured to abut against a first end A14 of the bushing 14 . The shoulder 26 is configured as a radially proj ecting collar, preferably having a hexagonal profile for the coupling to a control wrench .
The fastening element 20 moreover comprises a radially deformable annular element 28 , fitted on the stem 20 at a position between the shoulder 26 and the second coupling profile 24 , and speci fically arranged close to the second coupling profile 24 , the latter proj ecting nearly completely with respect to a second end B14 of the bushing 14 , opposite the end A14 . Preferably, the radially deformable annular element is made of elastomeric material .
Still referring to Figure 2 , the bushing 14 comprises a first collar 30 at the first end A14 thereof , and a second collar 32 at a second end B14 thereof . The first collar 30 and the second collar 32 proj ect radially outwardly from the bushing 14 .
Referring to Figure 2 , preferably at least one of the collars 30 , 32 , and preferably both, are in contact with the polymeric material of the body 2 of the cover 1 on a respective circumferential peripheral band C30 ,
C32 extending along the axis X14 , and on a respective inner annular surface R30 , R32 facing the inner annular surface R30 , R32 of the opposite collar .
Always referring to the bushing 14 , the through- hole 16 comprises a first section 34 and a second section 36 , the first section 36 extending from the end A14 to the second section, and the second section extending from the first section to the second end B14 of the bushing 14 . The first section 34 has a diameter D34 smaller than a diameter D36 of the second section 36 . Both the diameter of the stem 20 and the diameter of the coupling profile 24 (maximum outer diameter ) are less than both the diameter D34 and the diameter D36 , so as to enable insertion .
In this regard, the radially deformable annular element 28 has an undeformed outer diameter D28 greater than the diameter D34 of the first section 34 and les s than the diameter D36 of the second section 36 . In thi s way, it is possible to insert the fastening element 18 through the bushing 14 by imparting the element 28 a radial deformation, so as to pass section 34 . Once section 34 is passed, the element 28 is free to return to the undeformed shape , so as to form a shoulder which prevents the fastening element 18 from sliding out of the through-hole 16 ( the sliding in the opposite direction is prevented by the shoulder 26 ) . In other words , the element 18 becomes an element unlosable from the cover 1 , and therefore the latter can be moved within the assembly plant of the engine E with the fastening elements 18 pre-installed thereon .
Referring again to Figure 1 , providing a cover 1 made of polymeric material enables the integration of sealing elements which are normally configured as separate components in the known covers of die cast metal material .
The cover 1 comprises a perimeter edge E4 at which a perimeter sealing element S2 is arranged which i s partly embedded in the polymeric material of the body 2 of the cover 1 and partly protrudes therefrom . In detail , the perimeter sealing element (which is arranged on the face of the cover 1 opposite the face shown in Figure 1 ) is configured as a cord of bi-inj ected elastomeric material , particularly of EPDM rubber .
At hole 3 there is moreover arranged, preferably by means of co-moulding, an annular sealing element R6 which lines the hole 6 and is partially embedded in the polymeric material of the body 2 of the cover 1 , in such a way as to receive an end o f a rotating shaft , particularly a drive shaft of an oi l pump of the internal combustion engine E . Preferably, the annular sealing element is made of co-moulded PTFE .
Figures 4 , 5 - and therewith Figures 6 , 7 , 8 - show the application of the cover 1 onto the engine E , and speci fically the fastening of an accessory W to the cover 1 .
The accessory BC shown in the Figures is a mounting bracket for an air-liquid heat exchanger W, which is used as an intercooler in a turbocharged internal combustion engine , the exchanger being normally denoted by the acronym WCAC .
Referring to Figures 4 and 7 , which are di f ferent only in the representation ( or the lack of representation) of engine E , the bracket BC is fastened to the cover 1 by means of the fastening assemblies 4 ( three assemblies in this speci fic solution) . More speci fically, also referring to Figure 3 , each coupling profile 24 is received in a seat EBK_S - preferably a threaded hole - present on the crankcase EBK, and i s tightened in such a way as to achieve a seal between the sealing element S2 and the crankcase EBK . The bracket BC
is fitted onto the coupling pro files 22 , which pas s through corresponding through-holes on the same bracket BC, and then it is tightened onto the cover 1 by means of nuts , which in turn are tightened onto the coupling profiles 22 .
The coupling profiles 22 , 24 are preferably configured as threads ; however, in alternative embodiments it is possible to configure the coupling profiles as bayonet elements , or as snap-on pins , or generally as quick-coupling j oints . An example of such categories of coupling profiles consists in the snap-on pins available from Bollhdf f® and marketed with the commercial name of SNAPLOC® .
Referring to Figures 5 and 8 , the heat exchanger W is then fastened at mounting seats Wl , W2 , W3 , W4 present on the bracket BC, the latter being by then already secured on the cover 1 by means of the fastening ass e mb lies 4 .
Finally, the cover 1 is fastened to the crankcase and, generally speaking, to auxiliary assemblies of the engine E ( a pump for cooling liquid and/or a pump for lubricating oil and, depending on the needs , also in additional points beside the points corresponding to the fastening assemblies 4 . For example , with reference to Figure 1 , the cover 1 may comprise a plurality of points for the fastening to the crankcase BK1 , BK2 , BK3 , BK4 , BK5 , a plurality of points for the fastening to an oi l pump 0P1 , 0P2 , 0P3 , 0P4 , and a point for the fastening to a pump for cooling liquid WP1 .
Thanks to the cover 1 according to the invention, therefore , it becomes possible to use a polymeric material for the production thereo f , without in any way j eopardi zing the possibility of fastening accessories and external components to the cover 1 and to the crankcase EBK . Moreover, it is possible to provide
gaskets and sealing elements which are integrated thereto .
Moreover, thanks to the provision of fastening assemblies 4 as depicted in the Figures , i . e . with a double-screw configuration which is unlosable thanks to the combination of the shoulder 26 , the geometry of the hole 16 and the annular element 28 , it is also possible to improve the plant logistics , by providing a cover 1 having the fastening elements pre-installed thereon, therefore reducing the number of components to be handled in the assembly station of the cover 1 .
Of course , the implementation details and the embodiments may amply vary with respect to what has been described and illustrated, without departing from the scope of the present invention as defined in the annexed claims .
Claims
1. A cover (1) , in particular for a timing driveline of an internal combustion engine (E) , comprising a body (2) made of a polymeric material and at least one fastening assembly (4) , said at least one fastening assembly (4) comprising a bushing (14) embedded in the polymeric material of the body (2) of the cover (1) and including a through-hole (16) , and a fastening element (18) housed in the through-hole (16) of said bushing (14) and passing through said bushing (14) , the fastening element (18) comprising a stem (20) , a first coupling profile (22) at a first end of said stem (20) , and a second coupling profile (24) at a second end of said stem (20) , opposite to the first end, the first coupling profile (22) and the second coupling profile (24) being arranged on opposite sides of said bushing (14) , and further wherein said first coupling profile (22) is configured to engage a support (BC) for an accessory (W) of an internal combustion engine (E) , and said second coupling profile (24) is configured to engage a crankcase (EBK) of an internal combustion engine (E) .
2. The cover (1) according to claim 1, wherein said first coupling profile (22) is a first thread and said second coupling profile (24) is a second thread.
3. The cover (1) according to claim 1 or claim 2, wherein said bushing (14) comprises a first collar (30) at a first end thereof (A14) , and a second collar (32) at a second end thereof (B14) , opposite to the first end, said first collar (30) and said second collar (32) projecting radially outwardly from said bushing (14) .
4. The cover (1) according to claim 3, wherein at least one, and preferably both, of the first collar (30) and the second collar (32) are in contact with the polymeric material of the body (2) of said cover (1) on
a respective circumferential peripheral band (C30, C32) extending along an axis (X14) of said bushing (14) and on a respective inner annular surface (R30, R32) facing the inner annular surface (R32, R30) of the opposite collar (32, 30) .
5. The cover (1) according to any one of the preceding claims, wherein the through-hole (16) of said bushing (14) comprises a first section (34) and a second section (36) , the first section (34) extending from a first end (A14) of said bushing (14) to said second section (36) , said second section (36) extending from said first section (34) to a second end (B14) of said bushing (14) , said first section (34) having a diameter (D34) smaller than a diameter (D36) of said second section (36) , wherein said fastener (18) comprises a shoulder (26) adjacent to said first coupling profile (22) and configured to abut against said first end (A14) of said bushing (14) , and further comprising a radially deformable annular element (28) fitted on said stem (20) at a position between said shoulder (26) and said second coupling profile (24) , and wherein said radially deformable annular element (28) has an undeformed diameter (D28) greater than the diameter (D34) of said first section (34) and less than the diameter (D36) of said second section (36) .
6. The cover (1) according to claim 5, wherein said second coupling profile (24) has a maximum diameter less than the diameter (D34) of said first section (34) of said through-hole (16) of said bushing (14) .
7. Cover (1) according to any one of the preceding claims, comprising a perimeter edge (E4) at which a perimeter sealing element (S2) is arranged, said perimeter sealing element (S2) being partly embedded in the polymeric material of the body (2) of the cover (1)
and partly protruding therefrom.
8. The cover (1) according to any one of the preceding claims, comprising a through hole (6) configured to receive an end of a rotating shaft, particularly a drive shaft of an oil pump of an internal combustion engine, said through hole (6) being lined with an annular sealing element partially embedded in the polymeric material of the body (2) of said cover (1) •
9. The cover (1) according to claim 5, wherein said radially deformable annular element (28) is an annular element of elastomeric material.
10. An Internal combustion engine (E) comprising a crankcase (EBK) including one or more cylinders and a wall housing a timing driveline of said internal combustion engine, the internal combustion engine (E) including a cover (1) according to any one of the preceding claims coupled to the crankcase (EBK) and covering said wall, the crankcase (EBK) including one or more seats (EBK_S) at said wall for the second coupling profile (24) of each fastening element (18) of said cover (1) •
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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IT102023000000177 | 2023-01-10 | ||
IT202300000177 | 2023-01-10 |
Publications (1)
Publication Number | Publication Date |
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WO2024150118A1 true WO2024150118A1 (en) | 2024-07-18 |
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ID=85792266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/IB2024/050185 WO2024150118A1 (en) | 2023-01-10 | 2024-01-09 | A cover for a timing driveline of an internal combustion engine |
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Country | Link |
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WO (1) | WO2024150118A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7040268B1 (en) * | 2004-10-14 | 2006-05-09 | General Motors Corporation | Engine cover brace assembly |
US20150267609A1 (en) * | 2014-03-19 | 2015-09-24 | Ford Global Technologies, Llc | Engine cover integrated captive fastener |
US20200217346A1 (en) * | 2019-01-09 | 2020-07-09 | Illinois Tool Works Inc. | Apparatus for a captured fastener assembly with expanding grommet |
-
2024
- 2024-01-09 WO PCT/IB2024/050185 patent/WO2024150118A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7040268B1 (en) * | 2004-10-14 | 2006-05-09 | General Motors Corporation | Engine cover brace assembly |
US20150267609A1 (en) * | 2014-03-19 | 2015-09-24 | Ford Global Technologies, Llc | Engine cover integrated captive fastener |
US20200217346A1 (en) * | 2019-01-09 | 2020-07-09 | Illinois Tool Works Inc. | Apparatus for a captured fastener assembly with expanding grommet |
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