EP3105448A1 - Liaison élastomère entre pipe d'électrovanne et conduit d'air plastique - Google Patents
Liaison élastomère entre pipe d'électrovanne et conduit d'air plastiqueInfo
- Publication number
- EP3105448A1 EP3105448A1 EP14827795.7A EP14827795A EP3105448A1 EP 3105448 A1 EP3105448 A1 EP 3105448A1 EP 14827795 A EP14827795 A EP 14827795A EP 3105448 A1 EP3105448 A1 EP 3105448A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- connection system
- retaining means
- protuberance
- annular
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10255—Arrangements of valves; Multi-way valves
Definitions
- the present invention relates to a connection system of automobile engine thermal engine air ducts.
- the invention relates in particular to a flexible and sealed connection of a mechanical means of a motor vehicle fixed in an air duct.
- an air circuit is in place to supply the engine and allow air to be supplied to the passengers of said vehicle directly by an air conditioning circuit.
- fresh air is therefore brought from the front of a motor vehicle to a compression unit of a turbocharger to be compressed and then sent to the engine unit to undergo after mixing with fuel combustion in the cylinders of said engine.
- the exhaust gases are taken up in a manifold and sent to a turbine stage of the turbocharger, then to means of depollution before being rejected externally by the muffler or returned partly to the air intake circuit of the engine.
- a valve is arranged to deflect the exhaust gas from the turbine wheel of the turbocharger to regulate the rotational speed of the turbine, and hence the speed of rotation of the compressor wheel.
- Said valve is a "wastegate" and the gases are taken downstream in the high pressure ducts of the turbine to be sent into the low pressure ducts upstream of said turbine.
- the operation of the wastegate is caused by pressure differences.
- an electromagnetic valve allows the return of a portion of the gas to an air duct or gas generally made of flexible material via a suction duct comprising a end an intake pipe held in said gas conduit, to allow a pressure drop and closure of the wastegate.
- Said pipe is held in position in said orifice, fixed in the longitudinal direction of the pipe but also fixed in rotation about the axis of the pipe. Indeed vibrations and air movements can cause the pipe to rotate around its axis causing stresses and deformations in the elements related to the solenoid valve.
- the pipe may also be removed as a change or maintenance.
- the gas or air duct 1 1 is an elastomeric tube and comprises a boss 52 having an orifice adapted to receive the pipe.
- the intake pipe is pressed into the orifice in the boss, the cylindrical wall of said orifice has a diameter substantially smaller than the diameter of the pipe to ensure the attachment and maintenance of said pipe in the orifice and the Aeraulic sealing of the intake pipe and gas pipe assembly.
- Said pipe does not open into the gas duct in order to avoid additional losses in the flow of said gases.
- the intake pipe has a substantially cylindrical duct comprising a first upper end attached to the solenoid valve 51 connected via the suction duct 17 to a turbocharger chamber 50 upstream of the wastegate according to FIG. 1.
- Said solenoid valve thus makes it possible to returning gases from said chamber to the gas duct 1 1 and lowering the pressure in said chamber to close the wastegate.
- the gas duct may also be plastic and have rigid but substantially thin walls.
- the substantially tubular solenoid valve pipe must, however, be mounted substantially perpendicular to the air duct and the attachment must be sealed to prevent gas leaks, withstand engine vibration and yet be simple and easy.
- connection of the pipe in the plastic conduit must also prevent any rotation of said pipe around its axis of revolution while allowing easy disconnection of the connection.
- the publication FR-A1 2865259 discloses a quick joint connection between two pipes comprising a male end pressed into a socket and a quick disconnect method.
- said fitting is sophisticated, expensive and difficult to implement on a motor vehicle gas conduit. Moreover it does not prevent the rotation of the male end.
- An object of the invention is to overcome these drawbacks and the invention relates to a motor vehicle plastic air intake duct comprising a connection system adapted to receive a cylindrical pipe, said pipe being fixed according to the longitudinal direction and in rotation about the axis of said pipe.
- the invention more particularly proposes a motor vehicle engine air duct comprising a connection system comprising a substantially tubular protuberance which comprises a connecting duct adapted to receive an intake pipe, and opening into the air duct,
- said connecting system comprises a sealed retaining means having a tubular inner wall sunk into the tubular protuberance and adapted to surround and block said pipe and in that said protrusion comprises fastening means for longitudinally locking the retaining means.
- connection system comprises a substantially tubular protuberance having a connecting conduit for receiving an intake pipe and to maintain it fixed by means of a retaining means.
- Said retaining means embedded in the same cylindrical duct is itself fixed longitudinally relative to the protuberance of the connection system.
- the pipe is of simple cylindrical shape. The retaining means ensures the tight connection and the locking of the pipe with the protrusion of the connection system.
- the inner tubular wall of the retaining means comprises at least one annular support flap on which the pipe is supported.
- the pipe bears on the at least one annular blister retaining the retaining means and its longitudinal and radial displacement is thereby limited.
- the inner tubular wall of the retaining means is extended at a lower end intended for contact with the gases of the air duct by an annular lip on which the pipe bears.
- the annular lip disposed at the bottom end of the inner tubular portion of the retaining means allows aeraulic sealing of the connection system.
- the pipe is extended at its lower end to be driven into the protuberance by an annular blister adapted to move the annular lip of the retaining means and allow easier extraction of said pipe. Indeed, during the extraction of the pipe, the lower end of the pipe can press on said annular lip which can then deviate to substantially clear the passage.
- the means for fixing the protuberance comprise at least one element of annular shape on which the retaining means bears.
- the protuberance comprises an annular element on which the retaining means bears and which thereby prevents any displacement of said retaining means in the longitudinal direction.
- the annular element comprises an annular hanging bellows extending over a portion of the outer surface of the protuberance.
- the annular swelling extending radially on the outer surface of the protuberance is adapted to block any longitudinal displacement of the retaining means, the retaining means being in abutment on said swelling.
- the annular element comprises an annular wall fixed to an upper end of the tubular protuberance and intended to partially close the connecting duct.
- said annular wall blocks the inner tubular wall of the retaining means which is driven into the connecting pipe.
- connection system comprises a flat and the pipe is secured to a support means which is supported on said flat.
- the flat part prevents any rotational displacement of the support means and the pipe which is integral with said support means.
- the retaining means comprises an outer tubular wall adapted to surround the protuberance.
- the retaining means surrounds the free upper end of the tubular protuberance for easier placement of said means in cooperation with the protuberance.
- the flat is disposed on a portion of the cylindrical surface of the outer wall of the retaining means. Since the retaining means completely surrounds the free end of the substantially cylindrical protuberance, the flat part created on a portion of the cylindrical outer surface of the retaining means is therefore easy to produce.
- the retaining means is made of elastomer.
- the elastomer retaining means is adapted to adhere against the surfaces of the protuberance, which further limits its movements; it also adheres against the cylindrical wall of the pipe to seal and fix the pipe relative to the blister.
- the insertion lengths of the intake pipe and the inner tubular wall of the retaining means are less than the length of the connecting pipe.
- the pipe installed in the connecting pipe does not protrude into the air duct and therefore does not disturb the flow of air in the air duct.
- FIG 1 shows a motor vehicle air duct comprising an elastomeric connection system.
- FIG. 2 represents an air duct connection system.
- FIG. 3 represents a schematic view of a solenoid valve cooperating with a pipe intended to be driven into the air duct.
- FIG 4 shows a sectional view along the plane AA of Figure 2 of the tubular protuberance of the connection system according to a first embodiment.
- FIG 5 shows a schematic sectional view along the plane AA of Figure 2 of a retaining means according to the first embodiment.
- FIG. 6 represents a schematic perspective view of the retaining means according to the first embodiment
- FIG. 7 represents a schematic cross-sectional view of the connection system according to a second embodiment.
- An air duct or gas duct is installed in the engine compartment of a motor vehicle to supply air / gas to said engine. It generally comprises a flexible plastic conduit having extension rings for taking into account the various movements of the air duct due to the different gas flow phases as shown in Figure 1.
- the pipe 1 1 of substantially tubular shape comprises at one end intended to be fixed to a housing, a fastening tip 12 of rigid plastic material which comprises a gas outlet orifice surrounded by a ring 13 having orifices 14 to be traversed by fixing screws shown in Figure 2.
- Said tip 12 has a substantially tubular protuberance 15 extending from an outer wall 25 of the nozzle 12 preferably perpendicular to the axis of the air duct 1 January.
- the protuberance is traversed along the axis of the protrusion by a cylindrical connecting pipe 16 which opens into the air duct as shown in Figures 4 and 7.
- Said endpiece 12 also comprises a connection system 100 intended to connect a chamber of a turbocharger turbine upstream of the regulating valve known by its name in English "wastegate" to the gas duct.
- Said not shown turbine chamber is thus connected via a supply duct 17 extended by an intake pipe 18 controlled by a solenoid valve 19.
- Said pipe is substantially a cylindrical tube intended to be driven into the air duct 1 1 and comprises at an open bottom end intended to be in contact with the gases an annular end blister 20 according to FIG. 3.
- the solenoid valve 19 is secured to an opposite upper end of the intake pipe and comprises a support means. 35 substantially in the form of a flat plate extending parallel to a plane containing the axis L of the pipe 18.
- the protuberance 15 comprises at least one hooked tubular blister 21 extending on the cylindrical outer surface 22 of the protuberance 15.
- Said blister 21 may preferentially have a cross-sectional profile in the form of a hook facing the lower end 44b of the protuberance facing the air duct.
- the protuberance also comprises a key 24 extending radially from the outer cylindrical surface 22, and preferably disposed at the foot 44b of the protrusion and integral with the outer wall 25 of the nozzle 12.
- the protuberance is surrounded by a retaining means 26 which comprises two substantially tubular walls 27e, 27i and coaxial which meet at an upper end 23h opposite the gas duct by a radial ring 27h as shown in FIGS. 4 and 5.
- Said means of retaining is intended to cover the upper end 44h of the protuberance 15 diametrically opposite to the gas duct 1 1.
- the first outer tubular wall 27e has on one part of its outer surface 28 a flat 29 and a notch 30 of complementary shape to the transverse profile of the key 24 of the protuberance.
- the surface of said first outer tubular wall 27e facing the protuberance may preferably comprise a notch 21b substantially complementary to the annular hanging bellows 21 of the protuberance in order to improve the cooperation between said outer tubular wall and the protuberance and locking the retaining means during extraction of the pipe.
- the second inner tubular wall 27i is adapted to be driven into the connecting duct 16 of the protuberance, the diameter of the surface of said second tubular wall 27i opposite the surface of the connecting duct 16 of the protuberance is preferably substantially equal to the diameter of the connecting pipe 16 of the protuberance to the accuracy of manufacture.
- the second inner tubular wall 27i thus surrounds a substantially cylindrical passage duct 31, the diameter of which is slightly greater than the diameter of the pipe 18.
- Said wall comprises at least one annular holding bellows 32 which extends on the inner surface of the second wall facing the axis of the second inner tubular wall 27i, to reduce the diameter of the passage conduit 31 which is then slightly smaller than the diameter of the pipe.
- the second inner tubular wall 27i is extended at its lower end 23b for contact with the gases of the air duct by an annular lip 33 which extends inwardly of the passage duct 31, said lip is intended for contact with the pipe 18 once the pipe engaged in full in the passage duct 31 and in particular with the annular end blister 20 of said pipe.
- the pipe is engaged in such a way that said end blister 20 protrudes from the lip 33.
- the length of the tubular protuberance is such that the length of the connecting pipe 16 is greater than the length of the pipe. 18.
- the pipe can thus not exceed the connecting pipe in the gas pipe 1 1 and thus disrupt the flow of gas.
- a vacuum is thus created at the mouth 34 of the connecting duct in the gas duct to allow suction of the gases from the turbine chamber.
- connection system is in a first step attached to a not shown casing of the turbocharger so that the protuberance 15 is accessible. Fastening screws then pass through the fixing orifices 14 of the nozzle 12 to be driven into fixing holes of said housing.
- the retaining means 26 is then threaded so that the second inner tubular wall 27i is engaged in the connecting duct 16 of the protuberance and the first outer tubular wall 27e surrounds the outer surface of said protuberance 15.
- the first outer wall 27e is fixed in abutment on the at least one hanging bump 21 on the outer surface of the protuberance, and the second tubular wall 27i is also bearing against the surface of the passage duct, which prevents easy removal of said restraint means 26.
- the retaining means is positioned in such a way that the notch 30 on the first outer tubular wall 27e co-operates with the key 24 of the protuberance in order to prevent any rotation of the retaining means around the axis of the tubular walls 27i , 27th.
- the intake pipe 18 is then engaged in the passage duct
- the pipe is then fixed in abutment on the at least one annular blister 32 for maintaining the second inner tubular wall, which prevents any displacement longitudinal of the pipe.
- the pipe axis L coincides with the axes of the outer and inner tubular walls 27e, 27i.
- the means for supporting the solenoid valve is placed in abutment on the flat surface 29 on the first cylindrical wall 27e, which prevents any rotation of the support means and thus of the intake pipe 15.
- the elastomeric retaining means allows the maintenance of the intake pipe while preserving vibrations from the operation of the engine.
- the extraction of the pipe is however easy.
- the annular end blister of the pipe presses on the annular lip 33 of the retaining means and spreads it to increase the passage diameter.
- the pipe is thus removed and the extraction force of said pipe during the passage through the at least one annular swelling is less than the attachment force of the retaining means 26 against the protuberance 15.
- the retaining means thus remains in place surrounding the protuberance.
- the 12 comprises a boss 40 having an opening 41 opening into the gas or air duct 1 1.
- the upper surface 42 of said boss opposite the gas duct is substantially flat and annular.
- connection system comprises a substantially tubular protuberance 15 comprising a connecting pipe 16, and an upper end 44h is extended by an upper annular wall 45 having an inside diameter substantially smaller than the diameter of the connecting pipe 16 and substantially equal to the diameter of the pipe 18.
- Said protrusion comprises on the outer cylindrical surface a flat portion 46 preferably disposed at the upper end 44h of the protuberance.
- a retaining means 26 comprises an inner tubular wall 27i preferably made of elastomer, surrounding a passage duct 31 and shaped to be engaged in the connecting duct 16 of the protuberance tubular 15 according to Figure 7.
- the length of the retaining means is substantially equal to the length of the protuberance.
- the inner tubular wall 27i of the retaining means 26 has on the inner cylindrical surface at least one annular holding bulge 32 which extends radially to reduce the passage diameter of the passage duct 31 to a diameter substantially smaller than the diameter of the pipe. .
- the retaining means 26 is extended at one end by an annular lip 33 which extends radially to reduce the section of the passage duct.
- the inner tubular wall 27i of the retaining means 26 is driven into the connecting duct 16 of the protuberance so that the annular lip 33 is at the opposite end of the upper annular wall 45 of the protuberance.
- the protuberance 15 is then fixed by its lower end 44b against the flat surface 42 of the boss of the nozzle 12, for example by gluing such that the connecting conduit opens through the opening 41 of the boss 40 in the air duct 1 1.
- the length of the connecting pipe then comprises the thickness of the boss 40.
- Said lower end 44b can be extended radially by an annular collar 47 intended to bear against said flat surface 42 of the nozzle to improve the fixing the protuberance against the upper flat surface 42 of the boss 40.
- the intake pipe 18 is then introduced through the passage conduit 31 of the retaining means and its lower end opens out of the annular lip 33 of said retaining means. It is held in position by the at least one annular holding puff 32.
- the length of depression of the pipe is preferably less than the length of the connecting pipe 16 as shown in FIG. 7.
- the axis of the pipe L is coincident with the axis of the inner tubular wall 27i.
- the support means 35 of the solenoid valve integral with the pipe bears against the flat portion 46 of the protuberance 15, which prevents any rotation of said support means 35 and thus of the intake pipe 18.
- the lower end of the pipe When extracting the intake pipe, identical to the previous embodiment, the lower end of the pipe is easily disengaged by removing the annular lip 33 of the retaining means during its sliding upwards. During the longitudinal displacement of the pipe along the axis L, the end blister of the pipe will also press the at least one annular swelling ring 32 to separate and increase the diameter of passage. The retaining means 26 remains in place inside the protuberance.
- connection system which allows the connection of a connecting pipe with a turbine chamber whose opening is controlled by a solenoid valve, with a plastic gas pipe simply and inexpensive.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1451169A FR3017690B1 (fr) | 2014-02-14 | 2014-02-14 | Liaison elastomere entre pipe d'electrovanne et conduit d'air plastique |
| PCT/FR2014/053109 WO2015121545A1 (fr) | 2014-02-14 | 2014-12-02 | Liaison elastomere entre pipe d'electrovanne et conduit d'air plastique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3105448A1 true EP3105448A1 (fr) | 2016-12-21 |
| EP3105448B1 EP3105448B1 (fr) | 2018-02-07 |
Family
ID=50780692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14827795.7A Active EP3105448B1 (fr) | 2014-02-14 | 2014-12-02 | Liaison élastomère entre pipe d'électrovanne et conduit d'air plastique |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3105448B1 (fr) |
| FR (1) | FR3017690B1 (fr) |
| WO (1) | WO2015121545A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2865259B1 (fr) * | 2004-01-20 | 2006-04-21 | Staubli Sa Ets | Raccord rapide et procede de desacouplement des elements male et femelle d'un tel raccord |
| DE102005051946A1 (de) * | 2005-10-19 | 2007-04-26 | Mündener Gummiwerk Gmbh | Im Spritzgießverfahren hergestellter Schlauch für die Führung von Gasen, insbesondere ein Schlauch zwischen Luftfilter und Turbolader eines Fahrzeugs |
| FR2984412B1 (fr) * | 2011-12-20 | 2014-01-24 | Peugeot Citroen Automobiles Sa | Circuit de mise a l'air d'au moins une electrovanne de commande et moteur thermique incorporant un tel circuit |
-
2014
- 2014-02-14 FR FR1451169A patent/FR3017690B1/fr not_active Expired - Fee Related
- 2014-12-02 EP EP14827795.7A patent/EP3105448B1/fr active Active
- 2014-12-02 WO PCT/FR2014/053109 patent/WO2015121545A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3017690B1 (fr) | 2016-02-05 |
| FR3017690A1 (fr) | 2015-08-21 |
| WO2015121545A1 (fr) | 2015-08-20 |
| EP3105448B1 (fr) | 2018-02-07 |
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