EP3174749A1 - Liaison souple de manchons d'air deformable - Google Patents
Liaison souple de manchons d'air deformableInfo
- Publication number
- EP3174749A1 EP3174749A1 EP15732857.6A EP15732857A EP3174749A1 EP 3174749 A1 EP3174749 A1 EP 3174749A1 EP 15732857 A EP15732857 A EP 15732857A EP 3174749 A1 EP3174749 A1 EP 3174749A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- upstream
- downstream
- air duct
- edge
- 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- Withdrawn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
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/02—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
Definitions
- the present invention relates to an air duct for a motor vehicle.
- the invention relates more particularly to an air duct disposed above a motor vehicle engine block having a tubular portion adapted to deform under impact along an axis orthogonal to the axis of said portion.
- Motor vehicles with a combustion engine comprise an air circuit for the operation of said engine.
- the air is captured from a front face of said vehicle to be conveyed via an air duct to an engine element.
- the engine is arranged in an ever smaller engine compartment and the air duct can be mounted above the engine and below a bodywork element such as a hood and is therefore affected by the different shocks produced on the engine. the hood among which the shocks with the pedestrians.
- Pedestrians have no means of protection and are particularly vulnerable to impact with the front of a vehicle.
- the shield and the bonnet of current motor vehicles have the mission of best dissipating the energy of the shock by their deformation.
- Automakers are aiming to make the front of cars less aggressive in the event of an impact involving an in-depth evolution of motor vehicles.
- the architecture of the front panel is thus modified to take into account new security elements, which will ensure maximum deformation and energy absorption.
- the hood can receive the weight of the pedestrian, so it is modified to ensure greater damping than a normal hood.
- a normal cover where, to ensure rigidity, reinforcements spread over the entire surface, for a modified cover, only the edges of said modified cover are reinforced.
- the perforated central part thus accepts a higher deformation.
- the deformation of the cover must not be impeded by elements disposed under said cover, a portion of the air duct disposed between said cover and the motor.
- air ducts of elastomeric material adapted to simply deform under a transverse force to the axis of the duct.
- these ducts are expensive to manufacture and the deformation of the duct is not controlled, that is to say that the duct under a transverse force to the axis of the duct may for example be moved from its initial position or be crushed in a direction that may damage an engine element.
- the conduit may be formed of different parts which are joined to each other by interlocking or gluing.
- the connection zone between said different parts may thus have a greater stiffness than the stiffness of each of said parts, which is likely to hinder the deformation of the hood during a pedestrian impact.
- said hooking mechanism is complex to allow the release of the air duct, on the other hand, said release then requires the reconnection of said duct and possibly the exchange of the snap mechanism which may have been damaged.
- the object of the invention is to overcome these disadvantages and an object of the invention is a substantially tubular air duct disposed above an engine block and adapted to deform by collapsing, said duct comprising minus two sleeves connected to each other by a connecting means adapted to follow the deformation of said two sleeves.
- the present invention more particularly proposes a substantially tubular motor vehicle engine air duct, disposed above said engine and under the hood, adapted to sag from a position of use to a collapsed position during an impact. applied on the hood, and comprising an upstream sleeve disposed before a downstream sleeve in the direction of flow of air, connected to each other by a fastening system, characterized in that said attachment system comprises a flexible connection from edge to edge between the upstream sleeve and the downstream sleeve, adapted to accompany the deformation of the air duct while maintaining the connection of the upstream sleeve and the downstream sleeve when the hood collapses and presses on the duct air.
- the air duct collapses when the hood collapses and presses on said duct during a pedestrian impact.
- the two upstream and downstream sleeves are joined to each other by a flexible connection from edge to edge.
- the connection of the two sleeves does not lead to an increase in the stiffness of the air duct, particularly at the level of the connection likely to hinder the deformation of the hood.
- said two sleeves remain joined to each other despite the deformation through said flexible connection.
- Said flexible connection is able to accompany the deformation of the air duct during the deformation of the hood following a pedestrian impact.
- the various elements of the air duct therefore remain in the operating position.
- the attachment system comprises deformation zones able to produce a programmed deformation.
- the attachment system comprises deformation zones able to deform according to a defined deformation pattern.
- the deformation is perfectly controlled according to force thresholds and the deformation of the air duct is not likely to have an effect on the other elements of the engine block.
- the flexible connection from edge to edge comprises a succession of connection zones between the sleeves spaced apart by free zones.
- the flexible connection comprises a succession of contact connection zones between the two sleeves spaced by free zones to obtain a limited stiffness of said connection.
- the attachment system comprises at least one upstream contact sidewalk arranged at a radial edge of the upstream sleeve and at least one downstream contact sidewalk arranged at a radial edge of the downstream sleeve, said at least one upstream contact sidewalk being adapted to cooperate with the at least one downstream contact sidewalk to form the flexible connection.
- the attachment system at least one contact sidewalk arranged on a radial end edge of the upstream sleeve and at least one complementary contact sidewalk arranged on a radial end edge of the downstream sleeve, said upstream sidewalks and downstream are able to cooperate together to form the flexible connection between the two sleeves.
- Said sidewalks can be arranged according to a common junction plane of the upstream sleeve and the downstream transverse sleeve to the axis of the upstream and downstream sleeve to form the edge-to-edge connection between the upstream sleeve and the downstream sleeve.
- the upstream sleeve and the downstream sleeve are permanently attached to one another by the contact sidewalks fixed against each other.
- the upstream sleeve and the downstream sleeve are permanently fixed by the contact sidewalks fixed against each other so that said sleeves do not disengage during deformation of the air duct.
- At least one upstream contact sidewalk is disposed at the upper or lower part of the edge of the upstream sleeve and in that the at least one sidewalk of downstream contact is disposed vis-à-vis the at least one upstream contact sidewalk at the upper or lower part of the edge of the downstream sleeve.
- the upstream sleeve and the downstream sleeve are arranged in a motor compartment of the vehicle and each have an upper portion and a lower portion along a vertical axis substantially orthogonal to the plane of the vehicle passing through the axes of rotation of the wheels of the vehicle, said at least one upstream contact curb is then disposed at the upper or lower part of the radial edge of the upstream sleeve and the at least one downstream contact curb is disposed opposite said upstream contact curb so that the stiffness of the connection between the sleeves remains limited so as not to hinder the deformation of the air duct during a pedestrian impact.
- connection between the sleeves is disposed substantially transversely to the deformation axis and is therefore not likely to increase the stiffness of the air duct in the deformation direction.
- the upstream sleeve is secured to the downstream sleeve by a weld.
- the upstream contact sidewalk is fixed against the downstream contact sidewalk by a vibration weld or by welding with a heating blade without adding a fixing product that can increase the stiffness of the air duct, especially at the level of the edge to edge between the two sleeves.
- the attachment system comprises at least one upstream stop surface arranged on the radial end edge of the front sleeve and a downstream abutment surface facing each other arranged on the radial end edge of the downstream sleeve and that said abutment surfaces are separated by an air knife.
- the attachment system comprises at least one upstream stop surface disposed on the front sleeve and a downstream abutment surface vis-à-vis disposed on the downstream sleeve separated from each other by a blade of air to improve the flexibility of the connection between the two sleeves.
- at least one upstream abutment surface is arranged according to the junction plane and juxtaposed with said at least one upstream contact sidewalk to surround an air passage section of the upstream sleeve and in that said at least one downstream abutment surface is arranged according to the junction plane and juxtaposed to said at least one downstream contact sidewalk.
- the at least one upstream abutment surface is arranged according to the transverse junction plane of the upstream sleeve juxtaposed to said at least one upstream contact sidewalk and it is the same for the at least one downstream abutment.
- Said respectively upstream / downstream abutment surface and said respectively upstream / downstream contact sidewalk are contiguous and arranged on the same transverse junction plane respectively upstream / downstream sleeve to ensure on the one hand a minimum air tightness at the level of the flexible connection of the air duct and secondly the connection between the two sleeves of the air duct.
- an abutment surface cooperates with the at least one contact sidewalk to surround an air passage section of the sleeve.
- Said sleeve surrounds an air passage section and the radial end junction edge of said sleeve is formed by a succession of abutment surfaces and contact sidewalks to impart to the connection between the sleeves the flexibility necessary to accompany the deformation of the air duct and not to hinder the deformation of the vehicle hood.
- the upstream sleeve and the downstream sleeve are made of thermoplastic elastomer, surrounding a substantially rectangular air passage section.
- FIG 1 shows a schematic longitudinal sectional view of the front portion of a motor vehicle.
- FIG 2 shows a schematic sectional view of an air duct according to one embodiment.
- FIG. 3 represents a perspective view of a junction end of an upstream sleeve.
- FIG. 4 represents a perspective view of a junction end of a downstream sleeve.
- FIG. 5 represents a longitudinal view of the connection between two sleeves
- a motor vehicle hood comprises an aspect part 13 responsible for defining the exterior of the vehicle.
- the appearance part is a cover 13 which covers a motor compartment 15 in which are arranged all the elements of the motor 30. Said elements are located under a layout surface 14.
- the space between the surface 14 and the cover 13 corresponds a dedicated space required for the bonnet to deform and able to cushion a shock applied to said hood during a pedestrian impact.
- top / top and bottom / bottom are cited to define references as to the final implantation of the various elements and in particular of the duct in the vehicle, respectively a point end end facing the cover 13 and an end point facing the motor 30.
- a substantially tubular air duct 10 is implanted in the engine compartment 15 above the engine 30, said air duct comprises a lower portion 22 generally disposed below the disposition surface 14 and an upper portion 21 projecting into the space dedicated to the amortization of pedestrian shocks. This overflow can then reduce the damping efficiency of the hood during a pedestrian impact.
- the air duct 10 comprises a first upstream sleeve 1 1 and a second downstream sleeve 12 arranged successively in the direction of flow of air; each of the upstream / downstream sleeves 1 1/12 may therefore comprise a lower portion disposed below the layout surface 14 and an upper portion 21 projecting into the space dedicated to the shock absorption pedestrian.
- Said upstream sleeve 1 1 comprises at a junction end 32 a radial edge 31 intended to be joined to a facing radial edge 41 disposed at a junction end 42 of the downstream sleeve 12.
- the two sleeves January 1, 12 are deformable and surround an air passage section 20 which may be substantially rectangular.
- said upstream / downstream sleeve is capable of collapsing so that the upper portion 21 of the sleeve is closer to the lower part of said sleeve.
- the buckling force threshold of the sleeve is of the order of 18 daN applied orthogonally to the upper part of said upstream / downstream sleeve.
- Said air passage section may, however, have a non-rectangular shape without harming the invention.
- the radial edge 31 of the junction of the upstream sleeve 1 1 extends on a junction plane 50 substantially transverse to said upstream sleeve.
- Said connecting edge 31 is substantially rectangular and has an upper side 33 and a lower side 34, said sides being connected to each other by lateral sides 35.
- the radial edge 41 of junction of the downstream sleeve 12 extends over a junction plane 50 substantially transverse to said downstream sleeve. It is complementary to said radial edge 31 of junction of the upstream sleeve 1 1 is disposed opposite said junction edge 31 of the upstream sleeve.
- the two upstream / downstream sleeves 1 1, 12 therefore share the same transverse junction plane 50.
- the junction edges 31 and 41 of the upstream sleeve 1 1 and the downstream sleeve 12 are intended to be fixed to each other for forming a connection 16 from edge to edge between the two sleeves January 1, 12.
- the upstream sleeve 1 1 is shown with the upstream joining edge 31 which comprises at least one contact sidewalk 36s, 36i arranged in the upper or lower part of said joining edge.
- said sidewalk 36s thus extends over the entire upper side 33 and a second contact sidewalk 36i is arranged in the lower part of said edge and extends over the entire lower side 34 of the edge.
- the contact walkways 36s, 36i are connected to each other via at least one abutment surface 37 which extends laterally between the upper side 33 and the lower side 34 of said sleeve edge.
- Said abutment surface can be defined simply by the thickness of a side wall 23 of the sleeve 1 1 by the length of the lateral side 35.
- the downstream sleeve 12 also comprises a downstream connecting edge 41 intended to be disposed facing the upstream joining edge 31 of the upstream sleeve 1 January.
- the downstream junction edge 41 also comprises an upper sidewalk 46s arranged in the upper part and a lower sidewalk 46i in the lower part of the downstream sleeve.
- Said upper sidewalls 46s and lower 46i of the downstream connecting edge 41 of the downstream sleeve 12 are complementary and in facing relation respectively to the upper sidewalks 36s and lower 36i of the upstream sleeve 11.
- the upper 46s and lower 46i sidewalks of the downstream sleeve 12 are also separated by an abutment surface 47 also extending on a lateral side 45 of the edge of the downstream sleeve 12.
- the joining edges 31, 41 of the upstream sleeve 1 1 and the downstream sleeve 12 are joined to each other by the permanent fixing of the upper sidewalks 36s, 46s of said sleeves against each other. other and lower sidewalks 36i, 46i of said sleeves against each other.
- the permanent attachment makes it possible to preserve the connection 16 between the upstream sleeve 1 1 and the downstream sleeve 12 even in the event of deformation of said sleeves.
- Said permanent fixing may be performed by a vibration welding or by welding with a heating blade between said contact sidewalks. Said welding thus makes it possible not to introduce additional fastening component such as an adhesive which is likely to increase the stiffness of the connection 16 between the two upstream sleeves January 1 and downstream 12. The two sleeves are thus joined end to end for substantially form the air duct having a continuity of material by the contact sidewalks.
- the abutment surfaces 37, 47 are arranged in such a way that once the upstream sleeve 11 is connected with the downstream sleeve 12, said abutment surfaces 36 of the upstream sleeve 11 are separated from said abutment surfaces 46 of the downstream sleeve 12 by an air knife 23 as shown in Figure 5.
- the two sleeves 1 1, 12 may then deform substantially different from each other during the collapse of the air duct 10.
- the air knife 23 also improves the acoustics of the engine.
- the upstream / downstream sleeve 1 1/12 is likely to sag or flare up and the air gap is likely to widen to allow then an additional air intake without consequence for the
- the stiffness along the sagging axis of the link 16 at the abutment surfaces is almost zero.
- the collapse of the sleeves is not thwarted by the link 16 which has a stiffness substantially less than the stiffness of said upstream / downstream sleeve 1 1, 12 or zero along the axis of sag.
- the connection 16 between the two sleeves is therefore flexible and is able to follow the deformations in sagging of said sleeves.
- the upstream sleeves 11 and downstream 12 are derived from molding.
- the upstream sleeve is made of elastomeric thermoplastic material such as PP-EPDM or santoprene according to grade 103-40.
- the downstream sleeve may comprise a thermoplastic lower part such as PP-TD20 and a deformable elastomeric thermoplastic upper part similar to the upstream sleeve.
- Lower santoprene grades such as 101-80 result in over-flexible parts that can flow under their own weight or temperature conditions resulting in improper air duct deformations and reduced efficiency of said duct.
- the air duct 20 comprises an upstream sleeve 11 and a downstream sleeve 12 connected to each other by a flexible and permanent edge-to-edge connection 16, said connection being suitable to accompany the deformations of said ducts during a rectangular pedestrian impact, said connection has a stiffness substantially lower than the stiffness of the sleeves along the sagging axis so as not to hinder the sagging of said sleeves.
- the flexible connection may also comprise a succession of flexible connection zones spaced apart by free zones constituted by the abutment surfaces.
- the sleeves can be deformed in a programmed or partial manner.
- the sleeve may comprise two side walls connected by an upper wall capable of receiving a support of the hood during a pedestrian impact, said side walls having different thicknesses to control the deformation of said walls.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1457496A FR3024405B1 (fr) | 2014-08-01 | 2014-08-01 | Liaison souple de manchons d'air deformable |
PCT/FR2015/051543 WO2016016525A1 (fr) | 2014-08-01 | 2015-06-11 | Liaison souple de manchons d'air deformable |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3174749A1 true EP3174749A1 (fr) | 2017-06-07 |
Family
ID=51862446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15732857.6A Withdrawn EP3174749A1 (fr) | 2014-08-01 | 2015-06-11 | Liaison souple de manchons d'air deformable |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3174749A1 (fr) |
FR (1) | FR3024405B1 (fr) |
WO (1) | WO2016016525A1 (fr) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004032597A1 (de) * | 2004-07-06 | 2006-02-16 | Volkswagen Ag | Karosseriehaube |
JP4581612B2 (ja) * | 2004-10-08 | 2010-11-17 | マツダ株式会社 | 車両のインタークーラ冷却用ダクトの支持構造 |
DE102004054274A1 (de) * | 2004-11-09 | 2006-05-11 | Mann + Hummel Gmbh | Ansaugsystem für die Brennkraftmaschine eines Fahrzeuges |
-
2014
- 2014-08-01 FR FR1457496A patent/FR3024405B1/fr active Active
-
2015
- 2015-06-11 EP EP15732857.6A patent/EP3174749A1/fr not_active Withdrawn
- 2015-06-11 WO PCT/FR2015/051543 patent/WO2016016525A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
FR3024405B1 (fr) | 2019-08-02 |
WO2016016525A1 (fr) | 2016-02-04 |
FR3024405A1 (fr) | 2016-02-05 |
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