EP2220394A1 - Volant d'inertie pour vehicule automobile avec joints amortissants - Google Patents
Volant d'inertie pour vehicule automobile avec joints amortissantsInfo
- Publication number
- EP2220394A1 EP2220394A1 EP08867630A EP08867630A EP2220394A1 EP 2220394 A1 EP2220394 A1 EP 2220394A1 EP 08867630 A EP08867630 A EP 08867630A EP 08867630 A EP08867630 A EP 08867630A EP 2220394 A1 EP2220394 A1 EP 2220394A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flywheel
- central hub
- axis
- windows
- motor vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000013016 damping Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
- F16F15/3153—Securing inertia members to the shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/1201—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon for damping of axial or radial, i.e. non-torsional vibrations
Definitions
- the present invention relates to a flywheel of an internal combustion engine, intended to be mounted between an internal combustion engine, in particular with several cylinders in line, and a motor vehicle transmission. It also relates to a motor vehicle as such equipped with such a flywheel. Finally, it relates to a method of manufacturing such a flywheel.
- flywheel also called flywheel
- the driving shaft is the crankshaft of an internal combustion engine, and the torque is transmitted to a driven element such as the input shaft of a motor vehicle.
- gearbox for example, usually via at least one clutch and a torsion damper.
- flywheels in particular flexible flywheels, are composed of two elements, including a relatively thick disc, which is capable of coming into frictional contact with an element of inertia.
- a clutch attached to a second, thinner element, for example in the form of a more or less flexible sheet metal disc, being fixed on the output shaft of the engine.
- the flywheel deforms in bending oscillating about axes perpendicular to its axis of rotation, under the excitation of pulses related to each combustion phase and the centrifugal forces of the movable coupling .
- the deformations of the steering wheel excite in return the crankshaft and can have a significant impact on the vibrations of the engine.
- the document FR2895471 describes a flexible flywheel which meets this need by providing a flexible element intended to be fixed to the drive shaft, characterized in that this flexible element comprises radial arms defining a preferred axis of oscillation perpendicular to the axis. rotation of the steering wheel. This construction is very complex.
- the annular mass of a flexible flywheel is generally formed by a cast iron crown fixed by screws or rivets on the outer radial periphery of an annular plate.
- flexible whose radially inner peripheral portion has fixing screw passage holes on the driving shaft, that is to say on the crankshaft of a motor to combustion.
- This solution requires multiple machining operations for fixing holes and screwing, which makes the complex and expensive manufacturing.
- a Bellevelle washer washer is inserted between the sheet and the annular mass, which further increases the cost and the manufacturing time.
- the object of the invention is therefore to provide a flywheel having reduced axial deflections while having flexibility in flexion.
- the object of the invention is also to provide a simple and economical manufacturing method of a flywheel.
- the invention is based on a flywheel for a motor vehicle comprising a central hub adapted to a connection of the flywheel with a driving shaft and a ring of inertia, characterized in that it comprises seals damping elements arranged between the central hub and the inertia ring.
- This flywheel may comprise a flat disc between the central hub and the flywheel ring, the outer face of which is intended to frictionally engage a clutch disc, and the damping seals may be arranged between the central hub and the disc. dish.
- the central hub may include through windows to soften bending, central hub arms being disposed between these through windows and not related to other parts of the flywheel to arrange spaces in which are placed seals damping.
- the central hub may comprise through windows to soften it in flexion, connecting arms of the central hub being arranged between these through windows to jointly secure the central hub to the other parts of the flywheel globally formed in one piece,
- the central hub may comprise four through windows distributed symmetrically on the peripheral portion of the central hub with respect to the x and y axes, the x axis being perpendicular to the plane of symmetry of a driving shaft and the axis y being the axis defined by the intersection of the average plane of the flywheel and the plane of symmetry of a driving shaft, and the flywheel may comprise two damping seals arranged on the y-axis and two link arms arranged on the x axis.
- the central hub may comprise six through windows distributed symmetrically on the peripheral portion of the central hub with respect to the x and y axes, the x axis being perpendicular to the plane of symmetry of a driving shaft and 'axis y being the axis defined by the intersection of the average plane of the flywheel and the plane of symmetry of a driving shaft ' and the flywheel may comprise four damping seals arranged on either side of two windows through-centers centered on the y-axis.
- the invention also relates to a motor vehicle characterized in that it comprises a flywheel as described above.
- the invention also relates to a method of manufacturing a flywheel as described above, characterized in that it comprises the following steps: -moulding in one piece of the flywheel including the molding of a central hub! and a ring of inertia;
- the step of producing damping seals can be obtained by injection of damping material.
- the one-piece molding step of the flywheel may include molding a flat disk between the central hub and the flywheel.
- Figure 1 shows a schematic side view of a flywheel and a crankshaft
- Figure 2 shows a front sectional view along a median plane of a flywheel according to a first embodiment of the invention
- 3 shows a side sectional view along a median plane of a flywheel according to the first embodiment of the invention
- Figure 4 shows a front sectional view along a median plane of a flywheel according to a second embodiment of the invention
- Figure 5 shows a side sectional view along a median plane of a flywheel according to the second embodiment of the invention.
- Figure 1 shows a part of a torque transmission device of an internal combustion engine of a motor vehicle. These measures torque transmission comprises a driving shaft, here a crankshaft 1, and a flywheel 2 for cooperating with a clutch disc (not shown),
- the flywheel 2 comprises a central hub 10, surrounded by a flat disc 20, the outer face 21 is intended to cooperate by friction with the clutch disc, not shown, the flat disc 20 itself being surrounded by a ring of inertia 30.
- the central hub 10 comprises four through windows 11 to soften the bending stiffness of the flywheel. These windows 11 are diametrically opposed and symmetrically arranged with respect to the x and y axes, the x axis being perpendicular to the plane of symmetry of the crankshaft 1 and the axis y being the axis defined by the intersection of the mean plane of the flywheel 2 and the plane of symmetry of the crankshaft 1.
- the motor hub 10 further comprises two arms 12 arranged between windows 11 on its periphery, in its outer radial portion " not directly linked with the rest of the flywheel 2, in particular the flat disk 20.
- the central hub 10 comprises on its periphery two connecting arms 13 also arranged between windows 11, which provide a connection between the central hub 10 and the disk pfat 20. By these two connecting arms 13, the flat disk 20 and the central hub 10 are two indissociable elements, forming a continuous, monolithic structure.
- the central hub 10 comprises a central centering opening 14 and openings 15 for attachment to a drive shaft.
- the ring of inertia 30 has a greater thickness to fulfill its function of annular mass, but comes in the continuity of the flat disc 20, I! there is no real physical distinction between the three elements 10, 20, 30 of the flywheel 2: they are parts of the same part that perform different functions.
- joints damping elements 18 made of a damping material of rubber or elastomer type are arranged between the central hub and the rest of the flywheel, more precisely in the space between the arms 12 of the central hub 10 and the flat disk 20 in this mode of operation. 'execution.
- the invention also relates to the method of manufacturing such a flywheel. Since all of its parts from the central hub 10 to the inertia ring 30 through the flat disk 20 form a single piece, it can easily be obtained by a conventional casting process. Such a method therefore more precisely comprises the following steps:
- the method will include the finishing steps such as machining of the centering hole 14 and the fixing holes 15.
- the flywheel 2 oscillates in flexion resulting in axial dynamic movements of its outer radial periphery, in particular parts of the ring. Inertia 30 and the flat disk 20. Especially when the flywheel 2 comes into bending resonance, its peripheral parts move strongly in the axial direction. As at the same time the central hub 10 remains relatively immobile, damping seals 16, related to both the central hub 10 immobile and axially moving peripheral parts, are stressed in shear. By nature, they thus absorb in such a situation part of the kinetic energy of this displacement and thus fulfill a damping function of the axial dynamic movements of the radial periphery of the flywheel.
- FIGS. 4 and 5 illustrate for this purpose a second embodiment in which the same references are used for the same elements, and in which the flywheel 2 comprises four damping seals 16 arranged on either side of two through windows 11 centered on the y axis, the central hub 10 comprising a total of six windows 11.
- the levels of flexibility around the two preferred axes x and y can be adjusted by acting on the size and shape of the through windows 11
- the two central hub portions 10 and the flat disc 20 may be the same part connected.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Mechanical Operated Clutches (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0708963A FR2925638B1 (fr) | 2007-12-20 | 2007-12-20 | Volant d'inertie pour vehicule automobile avec joints amortissants |
| PCT/EP2008/067829 WO2009083469A1 (fr) | 2007-12-20 | 2008-12-18 | Volant d'inertie pour vehicule automobile avec joints amortissants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2220394A1 true EP2220394A1 (fr) | 2010-08-25 |
Family
ID=39645661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08867630A Withdrawn EP2220394A1 (fr) | 2007-12-20 | 2008-12-18 | Volant d'inertie pour vehicule automobile avec joints amortissants |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2220394A1 (fr) |
| FR (1) | FR2925638B1 (fr) |
| WO (1) | WO2009083469A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11873879B2 (en) * | 2019-03-25 | 2024-01-16 | Aisin Takaoka Co., Ltd. | Flexible flywheel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2558905Y2 (ja) * | 1990-09-10 | 1998-01-14 | 株式会社ユニシアジェックス | フライホィールの取付構造 |
| FR2774440B1 (fr) | 1998-01-30 | 2000-03-03 | Valeo | Embrayage a friction dote d'un volant flexible |
| FR2844566B1 (fr) | 2002-09-13 | 2006-03-17 | Renault Sa | Volant d'inertie souple en tole emboutie pour embrayage de vehicule automobile |
| FR2883943B1 (fr) | 2005-04-04 | 2009-02-13 | Renault Sas | Volant d'inertie moteur ajoure |
| FR2890716B1 (fr) * | 2005-09-09 | 2007-12-07 | Valeo Embrayages | Volant d'inertie flexible, en particulier pour vehicule automobile |
| FR2895479B1 (fr) * | 2005-12-27 | 2012-03-23 | Renault Sas | Volant moteur comportant des moyens d'amortissement des oscillations dudit volant moteur |
| FR2895471B1 (fr) | 2005-12-27 | 2009-05-22 | Renault Sas | Dispositif de transmission de couple comprenant un volant moteur et des moyens d'amortissement des oscillations du volant moteur |
-
2007
- 2007-12-20 FR FR0708963A patent/FR2925638B1/fr not_active Expired - Fee Related
-
2008
- 2008-12-18 WO PCT/EP2008/067829 patent/WO2009083469A1/fr not_active Ceased
- 2008-12-18 EP EP08867630A patent/EP2220394A1/fr not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2009083469A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2925638A1 (fr) | 2009-06-26 |
| FR2925638B1 (fr) | 2012-12-21 |
| WO2009083469A1 (fr) | 2009-07-09 |
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Legal Events
| Date | Code | Title | Description |
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| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20160407 |
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| GRAP | Despatch of communication of intention to grant a patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20180928 |