EP3126719A1 - Vanne à fixation facilitée d'un ressort de torsion - Google Patents
Vanne à fixation facilitée d'un ressort de torsionInfo
- Publication number
- EP3126719A1 EP3126719A1 EP15717046.5A EP15717046A EP3126719A1 EP 3126719 A1 EP3126719 A1 EP 3126719A1 EP 15717046 A EP15717046 A EP 15717046A EP 3126719 A1 EP3126719 A1 EP 3126719A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control member
- valve
- return spring
- valve according
- toothed sector
- 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- Withdrawn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
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the invention relates to a valve, in particular a valve intended to be implemented in the automotive field.
- the invention more particularly relates to an exhaust gas recirculation valve, or EG valve, of the English "Exhaust Gas Recirculation”.
- the invention also relates to a method of manufacturing such a valve.
- valves comprising a valve opening control member, which rotates against a return spring acting in torsion.
- the return spring removes the control member in the determined position, once the actuation of the control member is completed.
- the return spring also makes it possible to maintain the control member in a determined position in the absence of actuation, despite the vibrations to which the valve can be subjected.
- Such a valve may in particular be of the butterfly type.
- the rotation of the flap or butterfly can be directly controlled by the rotation of the control member.
- the throttle may be integral in rotation with the control member.
- such a valve may be of the valve type moving in translation or in a helical movement, with respect to a valve seat which selectively closes.
- a device is interposed functionally between the control member and the valve stem, which transforms the rotation of the control member in translation, respectively in helical movement, of the valve stem.
- an EGR valve of this type is known from FR-A-2,914,975 or FR-A-2,947,027, in the name of the Applicant.
- EGR recirculation valves
- Figure 1 illustrates an EGR valve according to FR-A-2 947 027.
- the valve 100 comprises a valve 102 which allows the introduction and metering of the exhaust gas into the intake duct of a combustion engine of a motor vehicle.
- the valve 100 comprises an electric motor 104 meshing with a transmission wheel 106.
- the transmission wheel 106 meshes with a control member 108, here a toothed sector wheel.
- a camming cam 110 By means of a camming cam 110, the rotational movements of the toothed sector wheel 108 are converted into reciprocating movement of the valve 102 relative to a valve seat. However, the toothed sector wheel 108 is returned to the closed position of the valve 100 by a return spring 112, acting in torsion.
- this last has a radial projection 114 terminated by a folded tab 116 extending substantially in the direction of the axis A of rotation of the toothed sector wheel 108 and a direction orthoradiale relative to the toothed sector wheel 108.
- the folded leg 116 is pierced by a hole 118 receiving an end 120 of the return spring 112.
- the end 120 of the return spring 112, straight, extends substantially radially outwardly of the toothed sector wheel 108.
- the toothed sector wheel has a complex geometry. The cost of the valve is increased.
- the end of the spring extends radially outwardly of the toothed sector wheel. This increases the size of the valve. This disadvantage is particularly noticeable in the case of an EGR valve intended to be placed in the vicinity of a power unit of a motor vehicle where the space is reduced.
- the invention aims to provide an EGR valve, and more generally, a valve, especially for a motor vehicle, does not have the aforementioned drawbacks.
- the invention aims to propose a valve whose mounting is facilitated without its effectiveness being reduced.
- the valve also has a small footprint compared to the prior art.
- the invention aims a valve including a valve for a motor vehicle, in particular an exhaust gas recirculation valve, comprising a valve opening control member, rotating against the action of the valve.
- a return spring acting in torsion the return spring having a first connecting element adapted to cooperate with a second connecting element of the control member, the first and second connecting elements being shaped so as to be able to connect together the return spring and the control member, by rotation of the control member relative to the return spring from a position where the return spring and the control member are functionally independent.
- Such a valve has a facilitated fixing of the return spring on the control member. Indeed, this fixing is performed from a non-functional position of the return spring, wherein the return spring exerts no force on the control member by a simple rotation of the control member. The rotation of the control member connects the first connecting element of the return spring with the second connecting element of the control member so that the return spring can then perform its function of returning the control member. ordered.
- the valve may have one or more of the following features, taken alone or in combination:
- the first connecting element is a hook of the return spring, open in the circumferential direction of the control member, the hook preferably extending substantially in an orthoradial plane with respect to the control member and / or in which the second connecting element is a bearing surface of the control member;
- the hook is formed by a curved portion, around a radial direction relative to the control member, of the return spring;
- the return spring comprises an end oriented radially inwardly of the control member
- the bearing surface extends substantially in a radial direction relative to the control member
- the control member has at least one radial recess, the bearing surface being formed at an edge of the radial recess;
- control member comprises, at the radially outer end of the bearing surface, a projection extending in the direction of the axis of rotation of the control member and / or in an orthoradial direction relative to to the control member;
- the control member is adapted to be rotated between a position corresponding to the closure of the valve and at least one position corresponding to an opening of the valve;
- the valve comprises a cam with a cam path, a hitch rotatably connected to the control member and guided by the cam path of the cam, a shutter valve of a valve seat and a valve stem integral in translation of the coupling and the shut-off valve;
- the control member is integral in rotation with a shutter of a shutter of a passage in the valve
- the valve further comprises an actuating motor for rotating the control member
- control member is a toothed sector wheel
- the curvature of the bearing surface measured in a radial direction with respect to the control member, is greater than or equal to the curvature of the hook of the return spring, measured in a radial direction relative to the control member; ordered ;
- the diameter of the control member is substantially greater than the diameter of the return spring.
- the invention relates to a method of manufacturing a valve as described above in all its combinations comprising the steps of:
- FIG. 1 shows in perspective, a partially cutaway view of an exemplary EG valve according to the prior art
- FIG. 2 and 3 show schematically in perspective, a motion transformation device for an EGR valve, respectively exploded and assembled view;
- FIG. 6 to 8 show a top view of a detail of the motion transformation device of Figure 3 during three successive steps of assembly of the motion transformation device.
- valve for example an EGR valve for a motor vehicle, a portion of which is illustrated in FIGS. 2 and 3.
- This valve comprises a valve 12 which allows the introduction and dosing of a fluid, here the exhaust gas, in a pipe, here the intake.
- the valve is of the type comprising a control member 14 rotating against a return spring 16 acting in torsion.
- the valve first comprises a valve body forming a conduit for the exhaust gas to be recirculated.
- the valve body may also form a conduit for cooling water circulation of the valve.
- the body may have valve mounting holes to a power unit of a motor vehicle.
- Such fixing holes may in particular be made in flanges or flanges surrounding the outlets of the cooling water circulation duct, thus making it possible to integrate the cooling water circulation duct of the valve into the circulation duct of the duct. engine cooling water on which the valve is attached.
- Such fixing holes may also be made in flanges or flanges surrounding the outlets of an exhaust gas recirculation duct.
- the valve also includes a motor that can be mounted in a housing formed by the valve body.
- the engine meshes with a transmission wheel.
- the transmission wheel meshes with turn the control member 14, here a toothed sector wheel.
- the motor is thus adapted to rotate the toothed sector wheel 14.
- reciprocating movement here is meant a movement comprising a translation along an axis, possibly combined with a rotation with respect to this same axis.
- the movement-transforming device 18 comprises, inside a support member formed by the valve body, a cam-shaped cam 22 (or cylindrical cam), a cooperating bar 24 (or coupling). with the cam path 22 of the cylindrical cam 20, the bar 24 being fixed to the end of a rod 26 secured to the valve 12. To guide the rod 26 in the valve body, it can be provided one or more bearings between the rod 26 and the valve body.
- the cam path 22 is here formed of two identical tracks, on either side of a tubular wall of the cylindrical cam 20.
- the bar 24 is provided at each of its ends with a roller 28 cooperating with the path of cam so that when the toothed sector wheel 14 is rotated, the latter in turn drives the bar 24 in rotation causing, due to the travel of the rollers 28 in the cam path 22, the translation, or all of the less the reciprocation of the valve 12.
- the valve 12, the rod 26 and the bar 24 are integral in translation axis A of displacement of the valve 12, this translation responding to the rotation of the wheel sector toothed 14 around this same axis A.
- a bearing 30, here a ball bearing to allow the rotation of the toothed sector wheel 14 with respect to the cylindrical cam 20.
- the toothed sector wheel 14 is integral in rotation with a skirt 32 designed to cooperate with the bar 24.
- This skirt 32 comprises two symmetrical longitudinal walls and extending substantially parallel to the direction A of rotation of the wheel. toothed sector 14 and translation of the valve 12.
- the two longitudinal walls define between them a housing for the bar 24.
- the bar 24 is disposed in the housing so that the toothed sector wheel 14 is able to drive in rotation the bar 24 via the longitudinal walls of the skirt 32, and that the bar 24 is free to slide in the housing in the direction of translation of the valve 12.
- the rotation of the toothed sector wheel 14 causes the rotation of the bar 24, the rollers 28 of which then roll on the cam path 22 of the fixed cylindrical cam 20, which jointly causes a movement of the valve 12 in the direction of the axis A, of the displacement of the valve 12 and of the rotation of the toothed sector wheel 14, between a position of the valve 12 corresponding to a closure of the valve and at least one valve position corresponding to a valve opening, it being understood that at each position of the valve 12 corresponds a single angular position distinct from the toothed sector wheel 14.
- the toothed sector wheel 14 is connected to the support member by means of a return spring 16 acting in torsion.
- the opening of the valve 10 is controlled by the rotation of the toothed sector wheel 14, control member, itself caused by the rotation of the motor, actuating member, against a restoring force exerted on the toothed sector wheel 14 by the return spring 16.
- the return spring 16 is here a helical spring A axis corresponding to the axis of rotation of the toothed sector wheel 14.
- the return spring 16 is connected at one end to the support member and, at the other end, the toothed sector wheel 14, such that the rotation of the toothed sector wheel 14 controlling the opening of the valve causes a twisting of the return spring 16.
- the return spring 16 may be connected to the support member in that one of its ends, bent in the opposite direction from the rest of the helical winding of the return spring 16, is received in a hole in the support member or cooperates with a abutment formed for this purpose by the return spring 16.
- the return spring 16 is here received in a substantially cylindrical housing delimited by the support member, the cylindrical cam 22 and the toothed sector wheel 14.
- the return spring 16 exerts a return force reminding the toothed sector wheel 14 in its position corresponding to the closed position of the valve.
- This position of the toothed sector wheel 14 corresponding to the closing of the valve may correspond to a prestressed state of the return spring 16.
- the return spring 16 exerts a force on the toothed sector wheel 14 tending to rotate it.
- the rotation of the toothed sector wheel 14 beyond the position corresponding to the closure of the valve is prevented by the fact that the valve 12 is abutting against a valve seat.
- the axis A of rotation of the toothed sector wheel 14 makes it possible to define, for any considered point of the toothed sector wheel or the movement transformation device 18:
- the toothed sector wheel 14 has a radial recess 34.
- the toothed sector wheel 14 has a radius smaller than another angular sector. defined, in particular to the angular sector on which are formed meshing teeth of the toothed sector.
- the radial recess 34 extends between two substantially radial edges 36, 38.
- the first radial edge 36 delimits the toothed sector of the toothed sector wheel 14.
- the second radial edge 38 is formed at a rounded area 40 of the toothed sector wheel 14 (or bearing surface).
- the rounding of the second radial edge 38 is essentially defined with respect to a radial axis with respect to the toothed sector wheel 14.
- the toothed sector wheel 14 comprises a projection 42.
- the projection 42 extends here both in the direction of the axis A of rotation of the toothed sector wheel 14 and in a orthoradial direction. In other words, the projection 42 forms a bead (or fin) at the radially outer end of the second radial edge 38.
- the projection projects from the bearing surface 40, at the same time:
- the projection 42 extends:
- the end 44 of the return spring 16, intended to cooperate with the toothed sector wheel 14, extends radially inwardly of the return spring 16.
- the return spring 16 has a bend 46 at which the return spring 16 is bent or bent about an axis parallel to the axis A of rotation of the toothed sector wheel 14.
- the bend 46 preferably forms, in a plane normal to the axis A of rotation of the toothed sector wheel, an obtuse angle not flat.
- the angle a may thus be greater than 100 °, preferably greater than 120 °, and / or less than 170 °, preferably less than 160 °.
- An acute angle tends to prevent slippage of the end of the spring on the toothed sector wheel, while an angle too flat does not provide a significant gain in maintaining the position of the end of the spring. spring.
- the latter has a hook 48.
- the hook 48 is open in the circumferential direction of the toothed sector wheel 14.
- this hook 48 is made by a portion of the return spring 16 which is curved about a radial axis relative to the toothed sector wheel 14 (or the return spring 16).
- the hook 48 is thus similar to a straight ring on the side of the return spring 16.
- the hook 48 is formed by a portion of the return spring 16 such that the bend 46 is located along the return spring 16 between the hook 48 and the end 44 of the return spring 16 which is closest to the hook.
- the curvature (that is to say the inverse of the radius of curvature) of the portion of the return spring 16 forming the hook 48 may be less than the curvature of the bearing zone 40, at the level of the second radial edge 38, the two curvatures being measured around a substantially radial axis relative to the toothed sector wheel 14. This indeed allows a facilitated insertion of the toothed sector wheel 14 into the opening of the hook 48.
- the curvature of the hook 48 may initially be greater than or equal to the curvature of the bearing zone to obtain a clipping effect of the return spring 16 on the toothed sector wheel 14.
- the hook 48 and the toothed sector wheel 14, in particular the bearing zone 40 are shaped so as to be able to connect the return spring 16 and the spring 16 together.
- functionally independent means that the return spring does not exert torsional return force on the toothed sector wheel 14.
- a first step (FIG 6), the various elements constituting the device for transforming movements 18 are assembled.
- the return spring 16 is arranged in such a way that the opening of the hook 48 is substantially opposite the bearing zone 40.
- the initial radius of the return spring 16, before it is stressed in torsion is substantially greater than the radius of the toothed sector wheel 14, at the level of the second lateral edge 38.
- the opening of the hook 48 is oriented towards this second lateral edge 38 and at least part of the end 44 of the return spring 16 is received at the right (in the direction of the axis A of rotation of the toothed sector wheel 14) of the radial recess 34. This is achieved here because the end 34 extends radially inwardly with respect to the helical winding of the return spring 16.
- the assembly of the various elements constituting the device of transformation of movements 18 can be carried out so that the hook 48 of the return spring 16 is not, at first, received at the right of the radial recess 34.
- the hook can in particular be received under the toothed sector wheel 14. It It is then appropriate to rotate the toothed sector wheel 14, in the opposite direction to the direction of the return force of the return spring to return to the configuration of Figure 6.
- the rotation of the toothed sector wheel 14 can be performed using the actuating motor of the valve or, preferably, by a motor external to the valve on the assembly line.
- the diameter of the return spring 16 is smaller than the diameter of the toothed sector wheel 14.
- a receiving groove of the end 44 may be provided in the toothed sector wheel 14.
- the end 44 of the return spring 16 may not extend radially inwards, even if this solution has the advantage of limiting the overall size of the valve 10, the return spring 16 not protruding radially inwards. relative to the toothed sector wheel 14.
- the presence of a bend 46 is in any case preferred to ensure good stability of the connection between the return spring 16 and the toothed sector wheel 14.
- the diameter of the return spring 16 can, before the connection of the return spring 16 with the toothed sector wheel 14, be smaller than the diameter of the toothed sector wheel 14 at the of the second lateral edge 38.
- the hook 48 can thus be received in the radial recess 34 of the toothed sector wheel 14.
- the opening of the hook 48 can then be arranged opposite the bearing surface 40.
- the bearing zone is here formed at a radial lateral edge of a radial recess in the toothed sector wheel.
- support zone can be imagined by those skilled in the art.
- the hook 48 also, which is here formed by a curved portion of the return spring 16, can take many other forms. It can thus, for example, be made by folding, in particular. In this case, the hook 48 has at least one angle.
- first and second connecting elements may be magnets respectively fixed to the return spring and to the control member.
- the spring comprises a radial strand which cooperates with a housing "V" in the toothed sector wheel.
- valve valve and device for transforming the rotational movements of a control member in and out of the valve.
- the valve may be of the butterfly type, the control member then preferably being integral in rotation with the butterfly (or flap).
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1452878A FR3019255B1 (fr) | 2014-04-01 | 2014-04-01 | Vanne a fixation facilitee d'un ressort de torsion |
PCT/FR2015/050823 WO2015150686A1 (fr) | 2014-04-01 | 2015-03-31 | Vanne à fixation facilitée d'un ressort de torsion |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3126719A1 true EP3126719A1 (fr) | 2017-02-08 |
Family
ID=50933377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15717046.5A Withdrawn EP3126719A1 (fr) | 2014-04-01 | 2015-03-31 | Vanne à fixation facilitée d'un ressort de torsion |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3126719A1 (fr) |
FR (1) | FR3019255B1 (fr) |
WO (1) | WO2015150686A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3049673B1 (fr) * | 2016-03-30 | 2018-11-23 | Faurecia Systemes D'echappement | Vanne de ligne d'echappement et procede de montage correspondant |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10252424A1 (de) * | 2002-11-12 | 2004-05-27 | Robert Bosch Gmbh | Drehfeder |
JP2006022660A (ja) * | 2004-07-06 | 2006-01-26 | Denso Corp | 内燃機関用吸気制御装置 |
FR2914975B1 (fr) | 2007-04-16 | 2009-05-29 | Valeo Sys Controle Moteur Sas | Dispositif de transformation d'un mouvement de pivotement d'un pignon en un mouvement de translation d'un coulisseau et vanne comportant un tel dispositif |
FR2947027B1 (fr) * | 2009-06-17 | 2011-07-15 | Valeo Sys Controle Moteur Sas | Dispositif de transformation de mouvement et vanne comportant un tel dispositif |
FR2979410B1 (fr) * | 2011-08-23 | 2013-08-23 | Valeo Sys Controle Moteur Sas | Vanne, notamment pour circuit d'admission de moteur d'automobile, comportant un moyen d'entrainement en retour d'un volet obturateur en cas de defaillance du moyen de rappel |
US8746210B2 (en) * | 2012-04-26 | 2014-06-10 | Delphi Technologies, Inc. | Throttle return spring with eccentric locator coils |
-
2014
- 2014-04-01 FR FR1452878A patent/FR3019255B1/fr active Active
-
2015
- 2015-03-31 WO PCT/FR2015/050823 patent/WO2015150686A1/fr active Application Filing
- 2015-03-31 EP EP15717046.5A patent/EP3126719A1/fr not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015150686A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR3019255B1 (fr) | 2017-06-16 |
FR3019255A1 (fr) | 2015-10-02 |
WO2015150686A1 (fr) | 2015-10-08 |
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