EP2342447A1 - Egr valve comprising a support plate - Google Patents

Egr valve comprising a support plate

Info

Publication number
EP2342447A1
EP2342447A1 EP09763827A EP09763827A EP2342447A1 EP 2342447 A1 EP2342447 A1 EP 2342447A1 EP 09763827 A EP09763827 A EP 09763827A EP 09763827 A EP09763827 A EP 09763827A EP 2342447 A1 EP2342447 A1 EP 2342447A1
Authority
EP
European Patent Office
Prior art keywords
valve
support plate
valve according
pinion
projecting shaft
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
Application number
EP09763827A
Other languages
German (de)
French (fr)
Other versions
EP2342447B1 (en
Inventor
Laurent Albert
Michael Maitre
Stéphane PEYRAZAT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes de Controle Moteur SAS
Original Assignee
Valeo Systemes de Controle Moteur SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of EP2342447A1 publication Critical patent/EP2342447A1/en
Application granted granted Critical
Publication of EP2342447B1 publication Critical patent/EP2342447B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors

Definitions

  • the invention relates to the field of thermal engines, particularly for motor vehicles. It relates more particularly to an exhaust gas recirculation valve.
  • Exhaust gas recirculation systems are known by the name EGR for "Exhaust Gas Recirculation" and allow to reinject exhaust gases at the intake of a combustion engine to reduce emissions in particular.
  • these systems generally comprise a valve such as that described in EP 1 605 155.
  • the invention aims to simplify and optimize such a recirculation valve.
  • an exhaust gas recirculation valve for an internal combustion engine, comprising: a rotary actuator adapted to drive a pinion in rotation; a valve subassembly comprising an input wheel, a valve, and a motion transformation device adapted to convert the rotation of the input wheel into translation of the valve;
  • a transmission wheel meshing on the one hand with the pinion and on the other hand with the input wheel characterized in that it further comprises a support plate in which is formed a first opening, in which is disposed the rotary actuator, and a second opening in which is disposed the valve subassembly, a projecting shaft being fixed to the support plate and the transmission wheel being mounted to rotation on the salient tree.
  • the body of the valve is then made of the support plate.
  • valve transmission chain ie the actuator, the transmission wheel, and the valve subassembly
  • the support plate which considerably reduces mounting dispersions as well as the uncertainties associated with dimension chains.
  • the use of the support plate also allows a significant reduction in manufacturing costs since the cutting and possibly stamping of a single sheet replaces, with reference to the state of the art, the molding of several parts and their assembly. one against the other.
  • valve according to the invention may further comprise the following preferred features, taken alone or in combination:
  • the valve further comprises a protective cover of the pinion, the input wheel and the transmission wheel, the cover being mounted directly on the support plate; the axes of said openings and the projecting shaft are parallel;
  • said openings are through-vis-à-vis the support plate; said openings are arranged on the other of the salient tree;
  • the axis of rotation of the pinion and the carcass of the engine are coaxial;
  • the motor is sealed on its portion extending from the support plate in the opposite direction to the pinion;
  • the support sheet comprises a first skirt bordering the first opening
  • the support sheet comprises a second skirt bordering the second opening; the support sheet comprises a peripheral collar; the support plate has a perpendicular flange connecting the collar to the rest of the support plate; the support sheet comprises stiffening ribs.
  • Another object of the invention is a method of manufacturing a valve as described above.
  • This process which is particularly advantageous in terms of manufacturing cost, comprises the following steps:
  • FIG. 1 is a perspective view of a recirculation valve according to the invention.
  • FIG. 2 is a side view of the valve of Figure 1, the protective cover is not shown;
  • FIG. 3 is a perspective view of the support plate of the valve of Figures 1 and 2;
  • FIG. 4 is a perspective view of the support plate of a valve according to a second embodiment of the invention.
  • FIG. 5 is a perspective view of the recirculation valve according to the second embodiment of the invention
  • FIG. 6 is a perspective view of the rotary actuator used in the two embodiments of FIGS. 1 to 5.
  • Figure 1 shows a recirculation valve according to the invention. It comprises a rotary actuator consisting of an electric motor 1, a valve 2, and a body which here comprises a support plate 3.
  • This valve is intended to be mounted on a duct, thanks to the fixing lugs 6 connected to the support plate 3, so that the valve 2 can act in a conventional manner against a seat (not shown) for metering the exhaust gas. which are reinjected on admission.
  • valve subassembly 7 adapted to transform a rotational movement of an input wheel 8 into a translational movement of the valve 2.
  • a valve subassembly is conventional (see for example EP 1 605 155 cited above) and will not be described in more detail here.
  • the input wheel 8 is defined only on an angular sector corresponding to the maximum amplitude that is provided for the stroke of the valve 2.
  • a pinion 9 is fixed on the output shaft of the engine 1 and meshes with a first toothed portion 10 of a transmission wheel 11.
  • the transmission wheel 11 also meshes, via a second toothed portion 12, with the wheel of inlet 8 of the valve subassembly 7.
  • the first 10 and second 12 toothed portions are rigidly connected, the transmission wheel 11 being made in one piece or more rigidly connected.
  • the presence of the two toothed portions 10, 12 makes it possible to define a reduction ratio as a function of the engine 1 used, it being understood that, as a variant, not shown, the transmission wheel 10 may comprise only a single toothed portion which meshes with the With the pinion 9 and the input wheel 8, the transmission wheel 10 is rotatably mounted on a shaft 13 projecting transversely to the support plate 3.
  • the support sheet 3 is shown alone in FIG. 3. In the present example, it is a stamped sheet on which is fixed the shaft 13 and in which are formed a first opening 14 intended to house the engine 1 and a second openings 15 for housing the valve subassembly 7.
  • the openings 14, 15 are here disposed on either side of the shaft 13 which is fixed perpendicularly to the sheet 3 by welding, screwing or any other means.
  • Ribs 16 can be formed on the sheet 3 during stamping, in order to stiffen it.
  • a peripheral flange 17 may also be formed on the sheet 3 during stamping.
  • the openings 14, 15 are each surrounded by a skirt 18, 19 protruding perpendicular to the corresponding opening.
  • These skirts are here advantageously formed during the stamping of the support plate 3 and may include diameter shrinkage for reasons of rigidity and to adjust to the diameter of the element intended to take place (motor 1 or together valve 7).
  • the motor 1 and the valve assembly 7 are thus mounted in the corresponding opening 14, 15 so that they are held by tight fitting, welding, screwing or any other known means.
  • the skirts 18, 19 allow a more robust tight assembly of the elements 1, 7 on the sheet 3.
  • the carcass of the . 1, the periphery of the valve assembly I 1 and the shaft 13 are each placed in position directly with respect to the sheet 3.
  • the carcass of the engine 1 determines the position of the axis of rotation of the pinion 9
  • the valve assembly 7 determines the position of the translation axis of the valve 7.
  • the axis of rotation of the pinion 9, the translation axis of the valve 7 and the shaft 13 are all three set each directly in position relative to the same part (the sheet 3) and, being each in the present example, perpendicular to the sheet 3, they are all three parallel to each other to allow safe operation of the gear 9, 11 , 8.
  • the parallelism of these axes then depends only on a reduced dimension chain.
  • FIG. 4 illustrates a variant of the support plate. Elements similar to the embodiment of FIG. 3 are numbered in the same way.
  • the support sheet 3 has a deeper stamping so that the flange 17 is further away from the openings 14, 15 than a perpendicular flange 24 is formed. between the flange 17 and the remainder of the sheet 3.
  • the sheet 3 still gains rigidity.
  • the shaft 13 is further mounted on a base 20 ensuring a good perpendicularity with the sheet, even under stress.
  • FIG. 5 shows this support plate 3 cooperating with the engine 1, the valve assembly 7 and the transmission wheel 11, which are identical to those of FIG. 2.
  • the engine 1 is here mounted in its opening 14, whose skirt 18 is reduced to a reinforcing rib, and held in place by means of a plate 21 welded to the motor 1 on the one hand and welded to the flange 17 on the other hand.
  • Other known fastening means can of course be used.
  • the motor 1 can for example be forced into the opening 14 or welded. A good maintenance of the engine 1 is thus guaranteed so that the axis of rotation of the pinion 9 is perpendicular to the sheet 3.
  • the motor 1 of this FIG. 5 is shown alone in FIG. 6.
  • the plate 21 has a notch 22 so as not to interfere with the transmission wheel 11 (see FIG. 6).
  • the engine 1 further comprises, in the present example, an O-ring 23 which, when the engine 1 is fixed in the opening 14, seals the mounting.
  • the electrical connections (not shown) of the motor 1 are advantageously arranged on the top of the motor, that is to say near the pinion 9, and for example between the carcass and the plate 21. These electrical connections can thus be directly wired to the connector 5 (see Figure 1) from the inside of the cover 4, while the housing of the engine 1 is sealed under the O-ring 23.
  • the valve according to the invention thus eliminates a protective cover arranged around the motor, as is the case in the prior art where this cover is generally made in the form of an aluminum alloy foundry which has the disadvantage of putting in contact Thermal motor casing with hot exhaust gases which leads to a heating of the engine, which is here avoided.
  • the shape of the stamped support sheet may be adapted depending on the elements it supports or its mounting mode on the engine for which it is intended.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

Exhaust gas recirculation valve for an internal combustion engine, comprising: - a rotary actuator (1) designed to turn a pinion (9); - a valve subassembly (7) comprising an input wheel (8), a valve element (2) and a movement conversion device designed to convert the rotation of the input wheel (8) into a translational movement of the valve element (2); - a transmission wheel (11) meshing, on the one hand, with the pinion (9) and, on the other hand, with the input wheel (8). The valve further comprises a support plate (3) in which there are a first opening (14), in which the rotary actuator (1) is located, and a second opening (15) in which the valve subassembly (7) is located, a projecting shaft (13) being attached to the support plate (3), and the transmission wheel (11) being mounted for rotation on the projecting shaft (13).

Description

Vanne EGR comportant une tôle de support EGR valve with support plate
L'invention concerne le domaine des moteurs thermiques notamment pour véhicules automobiles. Elle concerne plus particulièrement une vanne de recirculation de gaz d'échappement.The invention relates to the field of thermal engines, particularly for motor vehicles. It relates more particularly to an exhaust gas recirculation valve.
ARRIERE PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION
Les systèmes de recirculation de gaz d'échappement sont connus sous la dénomination EGR pour « Exhaust Gaz Recirculation » et permettent de réinjecter des gaz d'échappement à l'admission d'un moteur à explosion pour notamment réduire les émissions polluantes.Exhaust gas recirculation systems are known by the name EGR for "Exhaust Gas Recirculation" and allow to reinject exhaust gases at the intake of a combustion engine to reduce emissions in particular.
Pour doser la quantité de gaz cl' échappement à réinjecter, ces systèmes comportent généralement une vanne telle que celle décrite dans le document EP 1 605 155.To measure the amount of exhaust gas to be reinjected, these systems generally comprise a valve such as that described in EP 1 605 155.
OBJET DE L'INVENTIONOBJECT OF THE INVENTION
L'invention a pour but de simplifier et d'optimiser une telle vanne de recirculation.The invention aims to simplify and optimize such a recirculation valve.
BREVE DESCRIPTION DE L'INVENTION A cet effet, l'invention vise une vanne de recirculation de gaz d'échappement pour moteur à combustion interne, comportant : un actionneur rotatif adapté à entraîner en rotation un pignon ; - un sous-ensemble de soupape comportant une roue d'entrée, une soupape, et un dispositif de transformation de mouvement adapté à convertir la rotation de la roue d'entrée en translation de la soupape ;BRIEF DESCRIPTION OF THE INVENTION To this end, the invention provides an exhaust gas recirculation valve for an internal combustion engine, comprising: a rotary actuator adapted to drive a pinion in rotation; a valve subassembly comprising an input wheel, a valve, and a motion transformation device adapted to convert the rotation of the input wheel into translation of the valve;
- une roue de transmission engrenant d'une part avec le pignon et d'autre part avec la roue d'entrée ; caractérisée en ce qu'elle comporte en outre une tôle de support dans laquelle sont pratiquées une première ouverture, dans laquelle est disposé l' actionneur rotatif, et une deuxième ouverture dans laquelle est disposé le sous-ensemble de soupape, un arbre saillant étant fixé à la tôle de support et la roue de transmission étant montée à rotation sur l'arbre saillant.a transmission wheel meshing on the one hand with the pinion and on the other hand with the input wheel; characterized in that it further comprises a support plate in which is formed a first opening, in which is disposed the rotary actuator, and a second opening in which is disposed the valve subassembly, a projecting shaft being fixed to the support plate and the transmission wheel being mounted to rotation on the salient tree.
Il est ainsi possible, dans une telle vanne de recirculation, de se passer de corps de fonderie dans la mesure où la tôle support assure seule la mise en position des organes de la vanne .It is thus possible, in such a recirculation valve, to dispense with foundry bodies insofar as the support plate alone ensures the positioning of the valve members.
Le corps de la vanne est alors constitué de la tôle support .The body of the valve is then made of the support plate.
De plus, les trois principaux éléments de la chaîne de transmission de la vanne (c'est-à-dire l ' actionneur , la roue de transmission, et le sous-ensemble de soupape) sont montés sur un seul et même élément (la tôle support) ce qui permet de réduire considérablement les dispersions de montage ainsi que les incertitudes liées aux chaînes de cote. L'emploi de la tôle support permet également une importante réduction des coûts de fabrication puisque le découpage et éventuellement l'emboutissage d'une simple tôle remplace, en référence à l'état de la technique, le moulage de plusieurs pièces et leur montage les unes par rapport aux autres.In addition, the three main elements of the valve transmission chain (ie the actuator, the transmission wheel, and the valve subassembly) are mounted on one and the same element (the support plate) which considerably reduces mounting dispersions as well as the uncertainties associated with dimension chains. The use of the support plate also allows a significant reduction in manufacturing costs since the cutting and possibly stamping of a single sheet replaces, with reference to the state of the art, the molding of several parts and their assembly. one against the other.
Le moteur, le sous-ensemble de soupape, et l'arbre saillant sont de préférence portés uniquement par la tôle de support, sans contact avec d'autres éléments de support ou de protection. La vanne selon l'invention peut en outre comporter les caractéristiques préférées suivantes, prises seules ou en combinaison :The motor, the valve subassembly, and the projecting shaft are preferably carried only by the support plate, without contact with other support or protection elements. The valve according to the invention may further comprise the following preferred features, taken alone or in combination:
- la vanne comporte en outre un capot de protection du pignon, de la roue d'entrée et de la roue de transmission, ce capot étant monté directement sur la tôle de support ; les axes desdites ouvertures et de l'arbre saillant sont parallèles ;- The valve further comprises a protective cover of the pinion, the input wheel and the transmission wheel, the cover being mounted directly on the support plate; the axes of said openings and the projecting shaft are parallel;
- lesdites ouvertures sont traversantes vis-à-vis de la tôle de support ; lesdites ouvertures sont disposées de part et d'autre de l'arbre saillant ;- said openings are through-vis-à-vis the support plate; said openings are arranged on the other of the salient tree;
- l'axe de rotation du pignon et la carcasse du moteur sont coaxiaux ;the axis of rotation of the pinion and the carcass of the engine are coaxial;
- l'axe de translation de la soupape et le contour de l ' ensemble de soupape sont coaxiaux ;the axis of translation of the valve and the contour of the valve assembly are coaxial;
- le moteur est étanche sur sa portion s 'étendant à partir de la tôle de support dans la direction opposée au pignon ;the motor is sealed on its portion extending from the support plate in the opposite direction to the pinion;
- un joint est disposé entre le moteur et la tôle de support ;a seal is placed between the motor and the support plate;
- la tôle de support comporte une première jupe bordant la première ouverture ;the support sheet comprises a first skirt bordering the first opening;
- la tôle de support comporte une deuxième jupe bordant la deuxième ouverture ; - la tôle de support comporte une collerette périphérique ; la tôle de support comporte un rebord perpendiculaire reliant la collerette au reste de la tôle de support ; - la tôle de support comporte des nervures de rigidification.the support sheet comprises a second skirt bordering the second opening; the support sheet comprises a peripheral collar; the support plate has a perpendicular flange connecting the collar to the rest of the support plate; the support sheet comprises stiffening ribs.
Un autre objet de l'invention vise un procédé de fabrication d'une vanne telle que décrite ci-dessus. Ce procédé, particulièrement avantageux en termes de coût de fabrication, comporte les étapes suivantes :Another object of the invention is a method of manufacturing a valve as described above. This process, which is particularly advantageous in terms of manufacturing cost, comprises the following steps:
- fournir une tôle métallique ;- provide a metal sheet;
- emboutir ladite tôle ;- stamping said sheet;
- pratiquer les ouvertures ;- practice the openings;
- fixer l'arbre saillant ; - fixer le moteur et le sous-ensemble de soupape ; monter la roue de transmission sur l'arbre saillant ; monter un capot directement sur la tôle de support . BREVE DESCRIPTION DES DESSINS- fix the projecting tree; - fix the motor and the valve subassembly; mount the transmission wheel on the projecting shaft; mount a cover directly on the support plate. BRIEF DESCRIPTION OF THE DRAWINGS
L'invention sera mieux comprise à la lumière de la description qui va suivre d'un mode de réalisation préféré et non limitatif, description faite en référence aux dessins annexés, parmi lesquels :The invention will be better understood in the light of following description of a preferred embodiment and not limiting, description made with reference to the accompanying drawings, among which:
- la figure 1 est une vue en perspective d'une vanne de recirculation selon l'invention ;- Figure 1 is a perspective view of a recirculation valve according to the invention;
- la figure 2 est une vue latérale de la vanne de la figure 1 dont le capot de protection n'est pas représenté ;- Figure 2 is a side view of the valve of Figure 1, the protective cover is not shown;
- la figure 3 est une vue en perspective de la tôle de support de la vanne des figures 1 et 2 ;- Figure 3 is a perspective view of the support plate of the valve of Figures 1 and 2;
- la figure 4 est une vue en perspective de la tôle de support d'une vanne selon un deuxième mode de réalisation de l'invention ;- Figure 4 is a perspective view of the support plate of a valve according to a second embodiment of the invention;
- la figure 5 est une vue en perspective de la vanne de recirculation selon le deuxième mode de réalisation de l'invention ; la figure 6 est une vue en perspective de l'actionneur rotatif utilisé dans les deux modes de réalisation des figures 1 à 5. DESCRIPTION DETAILLEE DE L'INVENTIONFIG. 5 is a perspective view of the recirculation valve according to the second embodiment of the invention; FIG. 6 is a perspective view of the rotary actuator used in the two embodiments of FIGS. 1 to 5. DETAILED DESCRIPTION OF THE INVENTION
La figure 1 représente une vanne de recirculation selon l'invention. Elle comporte un actionneur rotatif constitué d'un moteur électrique 1, une soupape 2, et un corps qui comporte ici une tôle de support 3. Un capot de protection 4, réalisé en un polymère résistant à la chaleur, est monté sur la tôle de support 3 pour protéger les organes de la vanne et pour porter le connecteur électrique 5 permettant de câbler le moteur 1 et d'autres éléments éventuels tel qu'un capteur de position de la soupape 2.Figure 1 shows a recirculation valve according to the invention. It comprises a rotary actuator consisting of an electric motor 1, a valve 2, and a body which here comprises a support plate 3. A protective cover 4, made of a heat-resistant polymer, is mounted on the sheet metal. support 3 to protect the valve members and to carry the electrical connector 5 for wiring the motor 1 and other possible elements such as a position sensor of the valve 2.
Cette vanne est destinée à être montée sur un conduit, grâce aux pattes de fixation 6 liées à la tôle de support 3, de sorte que la soupape 2 puisse agir de manière classique contre un siège (non représenté) pour doser les gaz d'échappement qui sont réinjectés à l'admission.This valve is intended to be mounted on a duct, thanks to the fixing lugs 6 connected to the support plate 3, so that the valve 2 can act in a conventional manner against a seat (not shown) for metering the exhaust gas. which are reinjected on admission.
Sur la figure 2, le capot 4 ayant été ôté, les organes internes de la vanne sont visibles. En plus du moteur 1, la vanne comporte un sous-ensemble de soupape 7 adapté à transformer un mouvement de rotation d'une roue d'entrée 8 en un mouvement de translation de la soupape 2. Un tel sous-ensemble de soupape est classique (voir par exemple le document EP 1 605 155 cité plus haut) et ne sera pas décrit plus en détail ici. ^In FIG. 2, the cover 4 having been removed, the internal organs of the valve are visible. In addition to the engine 1, the valve comprises a valve subassembly 7 adapted to transform a rotational movement of an input wheel 8 into a translational movement of the valve 2. Such a valve subassembly is conventional (see for example EP 1 605 155 cited above) and will not be described in more detail here. ^
La roue d'entrée 8 n'est définie que sur un secteur angulaire correspondant à l'amplitude maximale que l'on prévoit pour la course de la soupape 2.The input wheel 8 is defined only on an angular sector corresponding to the maximum amplitude that is provided for the stroke of the valve 2.
Un pignon 9 est fixé sur l'arbre de sortie du moteur 1 et engrène avec une première portion dentée 10 d'une roue de transmission 11. La roue de transmission 11 engrène également, via une deuxième portion dentée 12, avec la roue d'entrée 8 du sous-ensemble de soupape 7.A pinion 9 is fixed on the output shaft of the engine 1 and meshes with a first toothed portion 10 of a transmission wheel 11. The transmission wheel 11 also meshes, via a second toothed portion 12, with the wheel of inlet 8 of the valve subassembly 7.
La première 10 et deuxième 12 portions dentées sont rigidement liées, la roue de transmission 11 étant faite d'une seule pièce ou de plusieurs rigidement liées. La présence des deux portions dentées 10, 12 permet de définir un rapport de réduction en fonction du moteur 1 utilisé, étant entendu que, en variante non représentée, la roue de transmission 10 peut ne comporter qu'une seule portion dentée qui engrène à la fois avec le pignon 9 et la roue d'entrée 8. La roue de transmission 10 est montée à rotation sur un arbre 13 saillant transversalement à la tôle support 3.The first 10 and second 12 toothed portions are rigidly connected, the transmission wheel 11 being made in one piece or more rigidly connected. The presence of the two toothed portions 10, 12 makes it possible to define a reduction ratio as a function of the engine 1 used, it being understood that, as a variant, not shown, the transmission wheel 10 may comprise only a single toothed portion which meshes with the With the pinion 9 and the input wheel 8, the transmission wheel 10 is rotatably mounted on a shaft 13 projecting transversely to the support plate 3.
La tôle support 3 est représentée seule à la figure 3. Il s'agit dans le présent exemple d'une tôle emboutie sur laquelle est fixée l'arbre 13 et dans laquelle sont pratiquées une première ouverture 14 destinée à loger le moteur 1 et une deuxième ouvertures 15 destinée à loger le sous-ensemble de soupape 7. Les ouvertures 14, 15 sont ici disposées de part et d'autre de l'arbre 13 qui est fixé perpendiculairement à la tôle 3 par soudage, vissage ou tout autre moyen.The support sheet 3 is shown alone in FIG. 3. In the present example, it is a stamped sheet on which is fixed the shaft 13 and in which are formed a first opening 14 intended to house the engine 1 and a second openings 15 for housing the valve subassembly 7. The openings 14, 15 are here disposed on either side of the shaft 13 which is fixed perpendicularly to the sheet 3 by welding, screwing or any other means.
Des nervures 16 peuvent être formées sur la tôle 3 lors de l'emboutissage, afin de la rigidifier. Pour les mêmes raisons, une collerette périphérique 17 peut également être formée sur la tôle 3 lors de l'emboutissage.Ribs 16 can be formed on the sheet 3 during stamping, in order to stiffen it. For the same reasons, a peripheral flange 17 may also be formed on the sheet 3 during stamping.
Dans le présent exemple, les ouvertures 14, 15 sont entourées chacune d'une jupe 18, 19 saillant perpendiculairement à l'ouverture correspondante. Ces jupes sont ici avantageusement formées lors de l'emboutissage de la tôle de support 3 et peuvent comporter des rétrécissement de diamètre pour des raisons de rigidité et pour s'ajuster au diamètre de l'élément destiné à y prendre place (moteur 1 ou ensemble de soupape 7) . Le moteur 1 et l'ensemble de soupape 7 sont ainsi montés dans l'ouverture 14, 15 correspondante de sorte qu'ils soient maintenus par montage serré, soudage, vissage ou tout autre moyen connu. Les jupes 18, 19 permettent un montage serré plus robuste des éléments 1, 7 sur la tôle 3.In the present example, the openings 14, 15 are each surrounded by a skirt 18, 19 protruding perpendicular to the corresponding opening. These skirts are here advantageously formed during the stamping of the support plate 3 and may include diameter shrinkage for reasons of rigidity and to adjust to the diameter of the element intended to take place (motor 1 or together valve 7). The motor 1 and the valve assembly 7 are thus mounted in the corresponding opening 14, 15 so that they are held by tight fitting, welding, screwing or any other known means. The skirts 18, 19 allow a more robust tight assembly of the elements 1, 7 on the sheet 3.
La carcasse du . moteur 1, la périphérie de l'ensemble de soupape I1 et l'arbre 13 sont ainsi chacun mis en position directement par rapport à la tôle 3. Or, la carcasse du moteur 1 détermine la position de l'axe de rotation du pignon 9 et l'ensemble de soupape 7 détermine la position de l'axe de translation de la soupape 7. L'axe de rotation du pignon 9, l'axe de translation de la soupape 7 et l'arbre 13 sont donc tous trois mis chacun directement en position par rapport à une même pièce (la tôle 3) et, étant chacun, dans le présent exemple, perpendiculaires à la tôle 3, ils sont tous trois parallèles entre eux pour permettre un fonctionnement sûr de l'engrenage 9, 11, 8. Le parallélisme de ces axes ne dépend alors que d'une chaîne de cote réduite.The carcass of the . 1, the periphery of the valve assembly I 1 and the shaft 13 are each placed in position directly with respect to the sheet 3. Now, the carcass of the engine 1 determines the position of the axis of rotation of the pinion 9 and the valve assembly 7 determines the position of the translation axis of the valve 7. The axis of rotation of the pinion 9, the translation axis of the valve 7 and the shaft 13 are all three set each directly in position relative to the same part (the sheet 3) and, being each in the present example, perpendicular to the sheet 3, they are all three parallel to each other to allow safe operation of the gear 9, 11 , 8. The parallelism of these axes then depends only on a reduced dimension chain.
La figure 4 illustre une variante de la tôle de support. Les éléments similaires à la réalisation de la figure 3 sont numérotés de la même manière. La tôle de support 3 présente, selon cette variante, un embouti plus profond de sorte que la collerette 17 est plus éloignée des ouvertures 14, 15 qu'un rebord 24 perpendiculaire est formé entre la collerette 17 et le reste de la tôle 3. Selon cette variante, la tôle 3 gagne encore en rigidité. L'arbre 13 est de plus monté sur une embase 20 lui assurant une bonne perpendicularité avec la tôle, même sous contrainte. La figure 5 montre cette tôle de support 3 coopérant avec le moteur 1, l'ensemble de soupape 7 et la roue de transmission 11, qui sont identiques- à ceux de la figure 2. Le moteur 1 est ici monté dans son ouverture 14, dont la jupe 18 se réduit à une nervure de renfort, et maintenu en place par l'intermédiaire d'une plaque 21 soudée au moteur 1 d'une part et soudée à la collerette 17 d'autre part. D'autres moyens de fixation connus peuvent bien entendu être utilisés. Le moteur 1 peut par exemple être emmanché en force dans l'ouverture 14, ou encore soudé. Un bon maintien du moteur 1 est ainsi garanti de sorte que l'axe de rotation du pignon 9 soit bien perpendiculaire à la tôle 3.Figure 4 illustrates a variant of the support plate. Elements similar to the embodiment of FIG. 3 are numbered in the same way. In this variant, the support sheet 3 has a deeper stamping so that the flange 17 is further away from the openings 14, 15 than a perpendicular flange 24 is formed. between the flange 17 and the remainder of the sheet 3. According to this variant, the sheet 3 still gains rigidity. The shaft 13 is further mounted on a base 20 ensuring a good perpendicularity with the sheet, even under stress. FIG. 5 shows this support plate 3 cooperating with the engine 1, the valve assembly 7 and the transmission wheel 11, which are identical to those of FIG. 2. The engine 1 is here mounted in its opening 14, whose skirt 18 is reduced to a reinforcing rib, and held in place by means of a plate 21 welded to the motor 1 on the one hand and welded to the flange 17 on the other hand. Other known fastening means can of course be used. The motor 1 can for example be forced into the opening 14 or welded. A good maintenance of the engine 1 is thus guaranteed so that the axis of rotation of the pinion 9 is perpendicular to the sheet 3.
Le moteur 1 de cette figure 5 est représenté seul à la figure 6. La plaque 21 comporte une encoche 22 pour ne pas interférer avec la roue de transmission 11 (voir figure 6) .The motor 1 of this FIG. 5 is shown alone in FIG. 6. The plate 21 has a notch 22 so as not to interfere with the transmission wheel 11 (see FIG. 6).
Le moteur 1 comporte de plus, dans le présent exemple, un joint torique 23 qui, lorsque le moteur 1 est fixé dans l'ouverture 14, assure l'étanchéité du montage. Les connexions électriques (non représentées) du moteur 1 sont avantageusement disposées sur le dessus du moteur, c'est-à-dire à proximité du pignon 9, et par exemple entre la carcasse et la plaque 21. Ces connexions électriques pourront ainsi être directement câblées au connecteur 5 (voir figure 1) par l'intérieur du capot 4, tandis que la carcasse du moteur 1 est étanche sous le joint torique 23. La vanne selon l'invention permet ainsi de s'affranchir d'un capot de protection disposé autour du moteur, comme c'est le cas dans l'art antérieur où ce capot est généralement réalisé sous forme d'une fonderie en alliage d'aluminium qui a pour inconvénient de mettre en contact thermique l'enveloppe du moteur avec les gaz d'échappement chauds ce qui conduit à un échauffement du moteur, qui est donc ici évité.The engine 1 further comprises, in the present example, an O-ring 23 which, when the engine 1 is fixed in the opening 14, seals the mounting. The electrical connections (not shown) of the motor 1 are advantageously arranged on the top of the motor, that is to say near the pinion 9, and for example between the carcass and the plate 21. These electrical connections can thus be directly wired to the connector 5 (see Figure 1) from the inside of the cover 4, while the housing of the engine 1 is sealed under the O-ring 23. The valve according to the invention thus eliminates a protective cover arranged around the motor, as is the case in the prior art where this cover is generally made in the form of an aluminum alloy foundry which has the disadvantage of putting in contact Thermal motor casing with hot exhaust gases which leads to a heating of the engine, which is here avoided.
Des variantes de réalisation de l'invention pourront être envisagées sans sortir du cadre de l'invention. Notamment, la forme de la tôle de support emboutie pourra être adaptée en fonction des éléments qu'elle supporte ou de son mode de montage sur le moteur thermique auquel elle est destinée. Alternative embodiments of the invention may be envisaged without departing from the scope of the invention. In particular, the shape of the stamped support sheet may be adapted depending on the elements it supports or its mounting mode on the engine for which it is intended.

Claims

REVENDICATIONS
1. Vanne de recirculation de gaz d'échappement pour moteur à combustion interne, comportant : - un actionneur rotatif (1) adapté à entraîner en rotation un pignon (9) ;An exhaust gas recirculation valve for an internal combustion engine, comprising: - a rotary actuator (1) adapted to drive a pinion (9) in rotation;
- un sous-ensemble de soupape (7) comportant une roue d'entrée (8), une soupape (2), et un dispositif de transformation de mouvement adapté à convertir la rotation de la roue d'entrée (8) en translation de la soupape (2) ;a valve subassembly (7) comprising an input wheel (8), a valve (2), and a motion transformation device adapted to convert the rotation of the input wheel (8) into translation of the valve (2);
- une roue de transmission (11) engrenant d'une part avec le pignon (9) et d'autre part avec la roue d'entrée (8) ; caractérisée en ce qu'elle comporte en outre une tôle de support (3) dans laquelle sont pratiquées une première ouverture (14) , dans laquelle est disposé l'actionneur rotatif (1), et une deuxième ouverture (15) dans laquelle est disposé le sous-ensemble de soupape (7), un arbre saillant (13) étant fixé à la tôle de support (3) et la roue de transmission (11) étant montée à rotation sur l'arbre saillant (13) .- a transmission wheel (11) meshing on the one hand with the pinion (9) and on the other hand with the input wheel (8); characterized in that it further comprises a support plate (3) in which is formed a first opening (14), in which the rotary actuator (1) is arranged, and a second opening (15) in which is disposed the valve sub-assembly (7), a projecting shaft (13) being fixed to the support plate (3) and the transmission wheel (11) rotatably mounted on the projecting shaft (13).
2. Vanne selon la revendication 1, caractérisée en ce qu'elle comporte en outre un capot (4) de protection du pignon (9), de la roue d'entrée (8) et de la roue de transmission (11), ce capot (4) étant monté directement sur la tôle de support (3) .2. Valve according to claim 1, characterized in that it further comprises a cover (4) for protecting the pinion (9), the input wheel (8) and the transmission wheel (11), which hood (4) being mounted directly on the support plate (3).
3. Vanne selon l'une des revendications 1 et 2 , caractérisée en ce que les axes des ouvertures (14, 15) et de l'arbre saillant (13) sont parallèles. 3. Valve according to one of claims 1 and 2, characterized in that the axes of the openings (14, 15) and the projecting shaft (13) are parallel.
4. Vanne selon l'une des revendications 1 à 3, caractérisée en ce que les ouvertures (14, 15) sont traversantes vis-à-vis de la tôle de support (3) .4. Valve according to one of claims 1 to 3, characterized in that the openings (14, 15) are through vis-à-vis the support plate (3).
5. Vanne selon l'une des revendications 1 à 4, caractérisée en ce que les ouvertures (14, 15) sont disposées de part et d'autre de l'arbre saillant (13) .5. Valve according to one of claims 1 to 4, characterized in that the openings (14, 15) are arranged on either side of the projecting shaft (13).
6. Vanne selon l'une des revendications 1 à 5, caractérisée en ce que l'axe de rotation du pignon (9) et la carcasse du moteur (1) sont coaxiaux.Valve according to one of Claims 1 to 5, characterized in that the axis of rotation of the pinion (9) and the casing of the motor (1) are coaxial.
7. Vanne selon l'une des revendications 1 à 6, caractérisée en ce que l'axe de translation de la soupapeValve according to one of Claims 1 to 6, characterized in that the axis of translation of the valve
5 (2) et le contour de l'ensemble de soupape (7) sont coaxiaux.5 (2) and the contour of the valve assembly (7) are coaxial.
8. Vanne selon l'une des revendications 1 à 7, caractérisée en ce que le moteur (1) est étanche sur sa portion s 'étendant à partir de la tôle de support (3) dans8. Valve according to one of claims 1 to 7, characterized in that the motor (1) is sealed on its portion extending from the support plate (3) in
10 la direction opposée au pignon (9) .10 the opposite direction to the pinion (9).
9. Vanne selon l'une des revendications 1 à 8, caractérisée en ce qu'un joint (23) est disposé entre le moteur (1) et la tôle de support (3) .9. Valve according to one of claims 1 to 8, characterized in that a seal (23) is disposed between the motor (1) and the support plate (3).
10. Vanne selon l'une des revendications 1 à 9, 15 caractérisée en ce que la tôle de support (3) comporte une première jupe (18) bordant la première ouverture (14).10. Valve according to one of claims 1 to 9, characterized in that the support plate (3) has a first skirt (18) bordering the first opening (14).
11. Vanne selon l'une des revendications 1 à 10, caractérisée en ce que la tôle de support (3) comporte une deuxième jupe (19) bordant la deuxième ouverture (15) .11. Valve according to one of claims 1 to 10, characterized in that the support plate (3) has a second skirt (19) bordering the second opening (15).
20 12. Vanne selon l'une des revendications 1 à 11, caractérisée en ce que la tôle de support (3) comporte une collerette périphérique (17).12. Valve according to one of claims 1 to 11, characterized in that the support plate (3) comprises a peripheral flange (17).
13. Vanne selon la revendication 12, caractérisée en ce que la tôle de support (3) comporte un rebordValve according to Claim 12, characterized in that the support plate (3) has a flange
•25 perpendiculaire (24) reliant la collerette (17) au reste de la tôle de support (3) . • 25 perpendicular (24) connecting the flange (17) to the rest of the support plate (3).
14. Vanne selon l'une des revendications 1 à 13 , caractérisée en ce que la tôle de support (3) comporte des nervures (16) de rigidification.14. Valve according to one of claims 1 to 13, characterized in that the support plate (3) has ribs (16) for stiffening.
30 15. Procédé de fabrication d'une vanne selon l'une des revendications 1 à 14, caractérisé en ce qu'il comporte les étapes suivantes :15. A method of manufacturing a valve according to one of claims 1 to 14, characterized in that it comprises the following steps:
- fournir une tôle métallique (3) ;- supply a metal sheet (3);
- emboutir ladite tôle (3) ;- stamping said sheet (3);
35 - pratiquer les ouvertures (14, 15) ;- to make the openings (14, 15);
- fixer l'arbre saillant (13) ; fixer le moteur (1) et le sous-ensemble de soupape (7) ;- fix the projecting shaft (13); attaching the motor (1) and the valve subassembly (7);
- monter la roue de transmission (11) sur l'arbre saillant (13) ; - monter un capot (4) directement sur la tôle de support ( 3 ) . - mount the transmission wheel (11) on the projecting shaft (13); - fit a cover (4) directly on the support plate (3).
EP09763827A 2008-10-14 2009-10-07 Egr valve comprising a support plate Not-in-force EP2342447B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0805682A FR2937109B1 (en) 2008-10-14 2008-10-14 EGR VALVE COMPRISING A SUPPORT TOOL
PCT/EP2009/007192 WO2010043328A1 (en) 2008-10-14 2009-10-07 Egr valve comprising a support plate

Publications (2)

Publication Number Publication Date
EP2342447A1 true EP2342447A1 (en) 2011-07-13
EP2342447B1 EP2342447B1 (en) 2012-09-26

Family

ID=40652705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09763827A Not-in-force EP2342447B1 (en) 2008-10-14 2009-10-07 Egr valve comprising a support plate

Country Status (4)

Country Link
EP (1) EP2342447B1 (en)
ES (1) ES2396413T3 (en)
FR (1) FR2937109B1 (en)
WO (1) WO2010043328A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010064233A1 (en) * 2010-12-28 2012-06-28 Continental Automotive Gmbh Exhaust gas turbocharger with water-cooled turbine housing with integrated electric wastegate actuator
DE102011001535A1 (en) * 2011-03-24 2012-09-27 Pierburg Gmbh Automotive exhaust gas recirculation valve assembly
FR3071898B1 (en) * 2017-10-04 2020-07-10 Valeo Systemes De Controle Moteur ACTUATOR AND FLUID CIRCULATION VALVE COMPRISING THE SAME
GB2579354B (en) * 2018-11-23 2022-08-10 Helical Tech Ltd General purpose actuator

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Publication number Priority date Publication date Assignee Title
DE19825727A1 (en) * 1998-06-09 1999-12-16 Mannesmann Vdo Ag Throttle body
US6135415A (en) * 1998-07-30 2000-10-24 Siemens Canada Limited Exhaust gas recirculation assembly
US6935320B2 (en) * 2001-11-08 2005-08-30 Siemens Vdo Automotive Inc. Apparatus and method for exhaust gas flow management of an exhaust gas recirculation system
EP1526271B1 (en) * 2003-10-24 2007-06-13 Cooper-Standard Automotive (Deutschland) GmbH Exhaust gas recirculation valve
US7104523B2 (en) * 2004-06-12 2006-09-12 Borgwarner Inc. Valve having contamination counter-measures
DE102005028374A1 (en) * 2005-06-20 2006-12-21 Robert Bosch Gmbh Adjusting system for IC engine throttles or exhaust system valves comprises drive gear mounted on shaft of electric motor, intermediate gear and driven gear, intermediate gear being fitted with slip clutch

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Title
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Also Published As

Publication number Publication date
FR2937109A1 (en) 2010-04-16
WO2010043328A1 (en) 2010-04-22
FR2937109B1 (en) 2012-12-14
ES2396413T3 (en) 2013-02-21
EP2342447B1 (en) 2012-09-26

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