EP4114677A1 - Systeme de maintien d'un groupe motopropulseur comprenant un elastomere avec nervures annulaires - Google Patents
Systeme de maintien d'un groupe motopropulseur comprenant un elastomere avec nervures annulairesInfo
- Publication number
- EP4114677A1 EP4114677A1 EP21707343.6A EP21707343A EP4114677A1 EP 4114677 A1 EP4114677 A1 EP 4114677A1 EP 21707343 A EP21707343 A EP 21707343A EP 4114677 A1 EP4114677 A1 EP 4114677A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elastomer
- sleeve
- circular groove
- bore
- 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- Withdrawn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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
- B60K5/1208—Resilient supports
- B60K5/1225—Resilient supports comprising resilient rings surrounding a part of the unit
Definitions
- TITLE SYSTEM FOR MAINTAINING A MOTORPROPELLER UNIT INCLUDING AN ELASTOMER WITH ANNULAR RIBS
- the present invention claims the priority of French application No. 2002144 filed on 03.03.2020, the content of which (te ⁇ te, drawings and claims) is incorporated here by reference.
- the present invention relates to a system for maintaining a motor vehicle powertrain, as well as a motor vehicle equipped with such a support system.
- Motor vehicle powertrains comprising a transmission connected to a heat engine, constitute an assembly fixed in the body of the vehicle by various elastic connections in order to filter the vibrations emitted by this engine to avoid transmitting them to the body of the vehicle.
- the various elastic connections must both allow transmission of torque from the power train to the drive wheels, by compensating for the reaction torque that the transmission shafts apply to this group, and filter the various vibrations generated by the heat engine coming in particular from the reciprocating movements of the pistons, and torque oscillations given by each combustion.
- an engine support is generally provided on each side of the powertrain, and a retaining system forming a torque take-up link arranged in a longitudinal plane, preventing rotation of the group. around the axis passing through these two supports.
- three-cylinder heat engines without a balance shaft generate vibrations along the different axes at frequencies lower than those of a four-cylinder, which is more difficult to filter.
- a known type of torque take-up rod presented in particular by document US-A1 -20190054811, comprises a body comprising two bushes each connected to this body by an elastic connection forming an elastomer ring inserted between a bore of the body and the bush.
- a large diameter bore contains a low stiffness ring to filter low frequencies
- a perpendicular small diameter bore contains a high stiffness ring which filters high frequencies.
- An electromagnetic actuator inserted into the body improves the filtration of vibrations.
- the sleeve comprising the elastic connection of high stiffness has on its outer contour a circular groove centered on the transverse median plane, covering approximately half of the length of this sleeve.
- the elastomer ring comprises in the center an internal annular boss which fits into the circular groove of the sleeve, and on each side a hollow forming a crown which extends axially, the bottom of which is substantially aligned with the edge of this throat.
- Each axial hollow is radially bordered by an inner lip resting on the sleeve next to the groove, and an outer lip glued into a sheet cylinder which is fitted into the bore of the torque take-up link.
- the elastomer ring has a high stiffness for translations along the axis of the sleeve and the two axes in a perpendicular median plane.
- the central part of the elastomer between the two axial hollows gives a relatively low torsional stiffness for oscillations around the two axes of the perpendicular mid-plane.
- the torsional stiffness along the two axes of the median perpendicular plane is difficult to adjust by using only the central part of the elastic connection, to ensure the quality of the filtration of the vibrations following these rotations, in particular for certain heat engines.
- One object of the present invention is in particular to avoid these problems of the prior art.
- a system for maintaining a motor vehicle powertrain comprising a body having a bore receiving an axial sleeve held by means of an elastomer, this system being remarkable in that a cylindrical surface of the bore of the body or of the outer contour of the sleeve forming a first element, has a circular groove centered around a transverse median plane, receiving an annular boss of the elastomer, this elastomer comprising axially on each side of the annular boss a hollow detached from the first element, then an annular rib which bears on this first element.
- An advantage of this support system is that the annular boss fitted in the circular groove simultaneously maintains the elastomer on the first element for translations in the three directions, each exhibiting linear stiffness.
- the separate annular ribs bearing on the first element add elastic supports axially distant from the central boss and from the transverse median plane, by providing an elastic torque of angular stiffness for the torsion around the two axes of this median plane.
- these two angular stiffnesses are easily and precisely adjusted. In this way, the stiffness of the oscillations along these two axes can be adapted in particular precisely for heat engines exhibiting a high level of excitation, in order to limit the vibrations transmitted to the vehicle body and to ensure comfort.
- the powertrain support system according to the invention may further include one or more of the following features, which may be combined with one another.
- the circular groove has an axial length less than half of the total length of the elastomer.
- the depth of the circular groove is less than 2mm.
- the annular rib is supported on the first element by a transverse face turned towards the transverse median plane.
- the annular rib advantageously bears on a chamfer of the first element.
- the circular groove is formed in the bore of the body.
- the circular groove is formed on an outer cylindrical surface of the socket.
- the sleeve can be extended on each side after the outer cylindrical surface, by a cylindrical part of smaller diameter.
- the subject of the invention is also a motor vehicle comprising a powertrain equipped with a heat engine maintained by supports and by a retaining system taking up the traction torque, remarkable in that this retaining system comprises any one of the following. previous characteristics.
- the heat engine not comprising a balancing shaft, has three cylinders.
- FIG. 1 presents a holding system according to the invention comprising a link forming the body;
- FIG. 2 is a detailed view of the bore of the connecting rod receiving the socket;
- FIG. 3 is a view of the sleeve fitted with its elastomer
- FIG. 4 is an axial sectional view of the sleeve
- FIG. 5 is an axial sectional view of a sleeve according to a variant.
- FIG. 6 presents a support system according to the invention comprising a support forming the body.
- FIG. 1 shows a retaining system comprising a link comprising a body 2 produced by molding an aluminum alloy, elongated along an axis X, comprising on one side a first elastic connection comprising a sleeve 4 of axis Z 'parallel to the Z axis surrounded by an elastomer of large radius 8 having a low stiffness, and on the other side a second elastic connection comprising a sleeve 10 of axis Y surrounded by an elastomer of small radius 12 having a high stiffness .
- Each transverse end face of the sleeves 4, 10 has radial ridges 6, facilitating hooking onto the yoke receiving it in order to avoid slipping.
- the second elastic connection comprising its sleeve 10 and its elastomer 12, is symmetrical with respect to the median transverse plane XZ.
- Figures 2 and 4 show the bore 20 of the body 2 of the second elastic link, comprising a cylindrical surface with an entry chamfer 18 of approximately 1 mm, comprising a circular inner groove 22 centered on the transverse median plane XZ.
- the circular groove 22 having a depth of less than 2mm, advantageously of approximately 1mm, which extends over an axial length of less than half the length of the bore 20, advantageously over approximately one third of this length.
- the circular groove 22 has edges inclined at approximately 45 ° relative to the transveisal plane.
- Figures 3 and 4 show the metal sleeve 10 having radially inner and outer cylindrical surfaces over their entire length, and on each end face the radial ridges 6.
- Elastomer 12 has a cylindrical inner radial surface bonded to the entire outer surface of bush 10, and an outer radial surface including a central annular boss 24 that fits into circular groove 22.
- Figure 5 shows the bore 20 of the body 2 formed by a cylindrical surface which is continuous over its entire length.
- the elastomer 12 has a cylindrical outer radial surface bonded to the bore of the body 20, and an inner radial surface comprising a central annular boss 24 which fits in the circular groove 22.
- the elastomer 12 has axially on each side of the boss. interior 24 a cylindrical hollow 26 at a distance of approximately 1 to 2mm from the cylindrical exterior surface of the sleeve 32, then an annular rib 28 comprising a face turned towards the median plane XZ, resiliently resting on a chamfer 18 of the edge of this surface cylindrical.
- the sleeve 10 is extended on each side after the cylindrical outer surface 32, by a cylindrical portion of small diameter 34 comprising at its end the radial ridges 6.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Vibration Prevention Devices (AREA)
- Motor Or Generator Frames (AREA)
- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002144A FR3107860B1 (fr) | 2020-03-03 | 2020-03-03 | Systeme de maintien d’un groupe motopropulseur comprenant un elastomere avec nervures annulaires |
| PCT/FR2021/050195 WO2021176154A1 (fr) | 2020-03-03 | 2021-02-03 | Systeme de maintien d'un groupe motopropulseur comprenant un elastomere avec nervures annulaires |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4114677A1 true EP4114677A1 (fr) | 2023-01-11 |
Family
ID=71111550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21707343.6A Withdrawn EP4114677A1 (fr) | 2020-03-03 | 2021-02-03 | Systeme de maintien d'un groupe motopropulseur comprenant un elastomere avec nervures annulaires |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4114677A1 (fr) |
| FR (1) | FR3107860B1 (fr) |
| WO (1) | WO2021176154A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2106541A (en) * | 1934-04-09 | 1938-01-25 | Briggs Mfg Co | Engine mounting |
| CH502176A (de) | 1968-02-19 | 1971-01-31 | Puetzer Kunststofftechnik Gmbh | Verfahren zur Herstellung eines Hohlkörpers aus Kunststoff und nach diesem Verfahren hergestellter Hohlkörper |
| JP2002333045A (ja) * | 2001-05-08 | 2002-11-22 | Toyo Tire & Rubber Co Ltd | 防振ブッシュ |
| JP6570967B2 (ja) | 2015-10-28 | 2019-09-04 | 株式会社ブリヂストン | トルクロッド |
| JP6683754B2 (ja) * | 2018-04-11 | 2020-04-22 | 本田技研工業株式会社 | 駆動源の支持構造 |
-
2020
- 2020-03-03 FR FR2002144A patent/FR3107860B1/fr active Active
-
2021
- 2021-02-03 WO PCT/FR2021/050195 patent/WO2021176154A1/fr not_active Ceased
- 2021-02-03 EP EP21707343.6A patent/EP4114677A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021176154A1 (fr) | 2021-09-10 |
| FR3107860A1 (fr) | 2021-09-10 |
| FR3107860B1 (fr) | 2022-02-11 |
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