EP0965748A1 - Fuel gauging and pressurizing system for automotive vehicle fuel tank and tank so equipped - Google Patents

Fuel gauging and pressurizing system for automotive vehicle fuel tank and tank so equipped Download PDF

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Publication number
EP0965748A1
EP0965748A1 EP99401451A EP99401451A EP0965748A1 EP 0965748 A1 EP0965748 A1 EP 0965748A1 EP 99401451 A EP99401451 A EP 99401451A EP 99401451 A EP99401451 A EP 99401451A EP 0965748 A1 EP0965748 A1 EP 0965748A1
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EP
European Patent Office
Prior art keywords
assembly
gauging
base
guide
tank
Prior art date
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Granted
Application number
EP99401451A
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German (de)
French (fr)
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EP0965748B1 (en
Inventor
Frédéric Tissot
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Marwal Systems SAS
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Marwal Systems SAS
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Publication of EP0965748A1 publication Critical patent/EP0965748A1/en
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    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/103—Mounting pumps on fuel tanks

Definitions

  • the present invention relates to the field of sets of gauging and drawing fuel from a vehicle tank automobile.
  • the present invention relates to means support of a fuel gauging and drawing assembly with respect to to a base intended to be fixed to a wall of the tank.
  • FIGS. 1 and 2 the means for translational guidance and for stress on the gauging and drawing assembly 20, are referenced 40.
  • the Applicant has found that this provision does not not always satisfactory, especially when the support base 30 is not fixed on a horizontal upper wall of the tank, but on an inclined wall. Indeed in this case the set of gauging and drawing 20 may not be properly pressed against the bottom 12 of the tank, as seen for example in Figure 2. Also in this case the point of contact on the bottom 12 of the tank depends both on the relative inclination, itself fluctuating, between the support wall of the base 30 and the bottom 12 of the tank, and the indexing of the base 30 on its support wall, that is to say of the angular position of this base 30 relative to its support wall around the axis of translation of the assembly of gauging and drawing.
  • the present invention now aims to propose again means with higher performance than the devices known prior.
  • the object of the present invention is in particular to provide means allowing reliable gauging and drawing whatever the inclination of the tank support wall which carries the base of this gauging and drawing assembly, and whatever the deformations from the bottom of the tank.
  • a fuel gauging and drawing system comprising a support base intended to be fixed on a tank wall and a gauging and drawing assembly mounted to displacement on the base support and biased towards the bottom of the tank, relative to this base, characterized in that the connecting means between the support base and the set of gauging and drawing includes at least two guide assemblies allowing one a translation and a relative swiveling and the other a translation and a displacement in a plane passing through the axis of associated translation.
  • the above-mentioned deflection plan also passes through the axis of translation of the first guide assembly.
  • the present invention also relates to the tanks thus equipped.
  • the gauging assembly and drawing 120 comprises a pump and a level detection means fuel in the tank, for example float operated, while that the support base 130 comprises a plate 132 adapted to be fixed tightly on a wall of the tank and which is crossed on the one hand by pipes connected to the pump and on the other hand by connections connected to the level detection means.
  • the support base 130 is provided with two chambers 140, 150 which open on its lower surface, in direction of the whole 120.
  • One 150 of the two chambers has a circular cross section of revolution and constant over its entire length.
  • the other chamber 140 has an oblong section and constant over its entire length.
  • this chamber 140 is delimited by two circular sectors 141, 142 interconnected by two flats 143, 144 parallel to each other.
  • these two flats 143, 144 are parallel to the plane defined by the axes 145, 155 of the two chambers 140, 150.
  • the drawing assembly 120 is in turn provided at its top with two drums 122 and 124 adapted to be engaged respectively in the rooms 140 and 150.
  • each of the drums 122, 124 is provided with a protrusion 123, 125 in the form of a spherical cap, near its upper end.
  • the cross section of the drums 122, 124 is less than that of the rooms 140, 150.
  • the outgrowth 125 has a diameter complementary to the diameter of chamber 150.
  • the projection 125 and the barrel 124 associated are susceptible of translation inside the chamber 150 along the axis of this, in a generally vertical direction and / or of a swiveling by relation to this around the center of the outgrowth 125.
  • the outgrowth 123 has a diameter complementary to the distance separating the two flats 143 and 144.
  • the protrusion 123 and the barrel 122 associates are susceptible of translation inside the chamber 140 and / or a deflection relative thereto transversely to the axis 145 and parallel to the flats 143, 144. Therefore the defined cooperation between the ball joint 123 and the chamber 140 ensures indexing of the assembly 120 relative to the base 130.
  • This guide structure allows a precise guidance of the assembly 120 allowing permanent support of this the latter by its lower surface, on the bottom of the tank, whatever the deformations of this bottom (rotation and / or translation) and / or its inclination relative to the wall of the tank which carries the base 130, as we have shown schematically in Figure 6.
  • drums 122, 124 are hollow and receive descending columns 146, 156 secured to the bottom of the rooms 140, 150 and centered on them.
  • These columns 146, 156 serve as central support for spiral springs 147, 157 interposed between the base 130 and the assembly 120, to request this last towards the bottom of the tank.
  • the springs 147, 157 are supported respectively on the bottom of chambers 140, 150 and on recesses 148, 158 formed inside the barrels 122, 124.
  • FIG. 5 illustrates an alternative embodiment according to which the columns 146, 156 integral with the base 130 and serving to guide the springs 147, 157 are replaced by risers 1460, 1560 integral with the top of the barrels 122, 124, and emerging beyond the spherical protuberances 123, 125, to ensure the same function of spring guide 147, 157.
  • the above-mentioned columns 146, 156 and 1460, 1560 are tapered, tapered away from their support, so as not to disturb the aforementioned relative displacement between the base 130 and the assembly 120.
  • the device according to the present invention offers in particular the following advantages.
  • the device according to the present invention makes it possible to maintain an indexing of the assembly 120 relative to the support base 130.
  • the present invention makes it possible to precisely control the path of the gauging float and avoid any collision of this float with the tank walls. This is especially important with tanks exploited nowadays because these tanks often have forms complexes adapted to best occupy the space available in vehicle infrastructure.
  • the present invention also makes it possible to facilitate the mounting of gauging and drawing devices, since it allows mounting separately and successively the gauging and drawing assembly 120 and the base 130.
  • the ball joint 123 and the chamber 140 associated could be replaced by a straight central guide 1400 integral with one of the assembly 120 or the base 130 and defining the direction of travel allowed and two lateral bearing surfaces 1230, for example in the form of spherical caps integral with each other the base 130 or of the assembly 120 and resting on said guide 1400, as shown schematically in Figure 7.
  • the management of authorized travel may not be parallel to the plane defined by the axes rooms 140, 150, but inclined relative to this plane.
  • At least one of the guide assemblies can define a hydraulic connection between the gauging assembly 120 and the support base 130.
  • This hydraulic connection is preferably defined by the assembly of guide which ensures translation and relative swiveling.
  • a hollow tube 156 secured to the support base 130 and which plunges into a tank 124 integral with the gauging assembly 120.
  • the internal volume of tubing 156 communicates with the internal volume of the fut 124.
  • the geometry of the upper end of fut 124 is suitable for ensure translation and relative swiveling relative to the pipe 156.
  • It sealing means are also provided, such as an O-ring 170, preferably with radial compression, between tubing 156 and was 124. This seal 170 is preferably provided as close as possible to the swiveling center.
  • Such a hydraulic connection can be used for example for deliver fuel from a pump located in a tank to injectors or to a carburetor.

Abstract

The fuel metering and drawing system comprises a support base (130) fixed on the fuel tank wall and a metering and drawing set (120), comprising a pump and a fuel level detector, mounted on the support base and moved relative to it to the bottom of the tank. The support base and the gauging system are connected by two sets of guides. The first comprises a ball joint (125) engaged in a circular section chamber (150) enabling a translation and relative ball jointing. The second guide set comprises a structure (123) fixed to the base engaged in an oblong section chamber (140) enabling a translation and a clearance along a plane passing through the associated translation axis.

Description

La présente invention concerne le domaine des ensembles de jaugeage et de puisage de carburant dans un réservoir de véhicule automobile.The present invention relates to the field of sets of gauging and drawing fuel from a vehicle tank automobile.

Plus précisément encore la présente invention concerne des moyens support d'un ensemble de jaugeage et de puisage de carburant par rapport à une embase destinée à être fixée sur une paroi du réservoir.Even more precisely, the present invention relates to means support of a fuel gauging and drawing assembly with respect to to a base intended to be fixed to a wall of the tank.

On a illustré schématiquement sur les figures 1 et 2 annexées des systèmes de jaugeage et de puisage de carburant conformes à des dispositions classiques conformes à l'état de la technique.Illustrated schematically in Figures 1 and 2 appended fuel gauging and fuel draw-off systems conventional arrangements in accordance with the state of the art.

La plupart des réservoirs 10 de carburant pour véhicules automobiles sont de nos jours réalisés en matière plastique. De ce fait on constate fréquemment que le fond 12 de ces réservoirs peut se déformer et se déplacer typiquement de plusieurs mm, sous l'effet du poids du carburant et d'effets thermiques. C'est pour cela que les systèmes 20 de jaugeage et de puisage sont généralement montés à translation par rapport à l'embase 30 fixée sur la paroi du réservoir 10 et sont sollicités vers le fond 12 dudit réservoir, comme on l'a schématisé sur les figures 1 et 2. Cette disposition a pour but principal de permettre au dispositif de jaugeage 20 de prendre référence par rapport au fond 12 du réservoir, quelle que soit la déformation de celui-ci.Most 10 motor vehicle fuel tanks are nowadays made of plastic. Therefore we see frequently that the bottom 12 of these tanks can deform and become typically move several mm, due to the weight of the fuel and thermal effects. This is why the gauging systems 20 and are generally mounted in translation relative to the base 30 fixed to the wall of the tank 10 and are biased towards the bottom 12 of said tank, as shown schematically in Figures 1 and 2. This arrangement main purpose is to allow the gauging device 20 to take reference relative to the bottom 12 of the tank, whatever the deformation of it.

Sur les figures 1 et 2 les moyens de guidage à translation et de sollicitation de l'ensemble de jaugeage et de puisage 20, sont référencés 40.In FIGS. 1 and 2, the means for translational guidance and for stress on the gauging and drawing assembly 20, are referenced 40.

Cependant la Demanderesse a constaté que cette disposition ne donne pas toujours satisfaction, notamment lorsque l'embase support 30 n'est pas fixée sur une paroi supérieure horizontale du réservoir, mais sur une paroi inclinée. En effet dans ce cas l'ensemble de jaugeage et de puisage 20 peut ne pas être plaqué correctement contre le fond 12 du réservoir, comme on le voit par exemple sur la figure 2. De plus dans ce cas le point de contact sur le fond 12 du réservoir dépend à la fois de l'inclinaison relative, elle même fluctuante, entre la paroi support de l'embase 30 et le fond 12 du réservoir, et de l'indexation de l'embase 30 sur sa paroi support, c'est à dire de la position angulaire de cette embase 30 par rapport à sa paroi support autour de l'axe de translation de l'ensemble de jaugeage et de puisage.However, the Applicant has found that this provision does not not always satisfactory, especially when the support base 30 is not fixed on a horizontal upper wall of the tank, but on an inclined wall. Indeed in this case the set of gauging and drawing 20 may not be properly pressed against the bottom 12 of the tank, as seen for example in Figure 2. Also in this case the point of contact on the bottom 12 of the tank depends both on the relative inclination, itself fluctuating, between the support wall of the base 30 and the bottom 12 of the tank, and the indexing of the base 30 on its support wall, that is to say of the angular position of this base 30 relative to its support wall around the axis of translation of the assembly of gauging and drawing.

La présente invention a maintenant pour but de proposer de nouveau moyens présentant des performances supérieures à celles des dispositifs antérieurs connus.The present invention now aims to propose again means with higher performance than the devices known prior.

La présente invention a en particulier pour but de proposer des moyens permettant un jaugeage et un puisage fiables quelle que soit l'inclinaison de la paroi support du réservoir qui porte l'embase de cet ensemble de jaugeage et de puisage, et quelles que soient les déformations du fond du réservoir.The object of the present invention is in particular to provide means allowing reliable gauging and drawing whatever the inclination of the tank support wall which carries the base of this gauging and drawing assembly, and whatever the deformations from the bottom of the tank.

Ces buts sont atteints dans le cadre de la présente invention grâce à un système de jaugeage et de puisage de carburant comprenant une embase support destinée à être fixée sur une paroi de réservoir et un ensemble de jaugeage et de puisage monté à déplacement sur l'embase support et sollicité vers le fond du réservoir, par rapport à cette embase, caractérisé par le fait que les moyens de liaison entre l'embase support et l'ensemble de jaugeage et de puisage comprennent au moins deux ensembles de guidage autorisant l'un une translation et un rotulage relatif et l'autre une translation et un débattement selon un plan passant pas l'axe de translation associé.These aims are achieved in the context of the present invention thanks to a fuel gauging and drawing system comprising a support base intended to be fixed on a tank wall and a gauging and drawing assembly mounted to displacement on the base support and biased towards the bottom of the tank, relative to this base, characterized in that the connecting means between the support base and the set of gauging and drawing includes at least two guide assemblies allowing one a translation and a relative swiveling and the other a translation and a displacement in a plane passing through the axis of associated translation.

De préférence le plan de débattement précité passe également par l'axe de translation du premier ensemble de guidage.Preferably the above-mentioned deflection plan also passes through the axis of translation of the first guide assembly.

La présente invention concerne également les réservoirs ainsi équipés.The present invention also relates to the tanks thus equipped.

D'autres caractéristiques, buts et avantages de la présente invention apparaítront à la lecture de la description détaillée qui va suivre, et en regard des dessins annexés, donnés à titre d'exemples non limitatifs et sur lesquels :

  • les figures 1 et 2 précédemment décrites illustrent des dispositifs conformes à l'état de la technique,
  • la figure 3 représente une vue schématique en coupe verticale d'un dispositif conforme à la présente invention,
  • la figure 4 représente une vue schématique en coupe horizontale des moyens de guidage conforme à la figure 3,
  • la figure 5 représente une vue schématique en coupe verticale d'une variante de dispositif conforme à la présente invention,
  • la figure 6 illustre schématiquement un dispositif conforme à la présente invention implanté dans un réservoir de carburant,
  • la figure 7 représente schématiquement un dispositif conforme à une autre variante de la présente invention, et
  • la figure 8 illustre une vue schématique en coupe verticale, d'un dispositif conforme à une autre variante de réalisation de la présente invention.
Other characteristics, aims and advantages of the present invention will appear on reading the detailed description which follows, and with reference to the appended drawings, given by way of nonlimiting examples and in which:
  • FIGS. 1 and 2 previously described illustrate devices according to the state of the art,
  • FIG. 3 represents a schematic view in vertical section of a device according to the present invention,
  • FIG. 4 represents a schematic view in horizontal section of the guide means according to FIG. 3,
  • FIG. 5 represents a schematic view in vertical section of a variant of the device according to the present invention,
  • FIG. 6 schematically illustrates a device in accordance with the present invention installed in a fuel tank,
  • FIG. 7 schematically represents a device according to another variant of the present invention, and
  • FIG. 8 illustrates a schematic view in vertical section, of a device according to another alternative embodiment of the present invention.

On aperçoit sur la figure 3 annexée un dispositif conforme à la présente invention comprenant un ensemble de jaugeage et de puisage 120 et une embase support 130. Ceux-ci peuvent faire l'objet de nombreux modes de réalisation connus en soi. Ils ne seront donc pas décrits dans le détail par la suite.We can see in Figure 3 attached a device according to this invention comprising a gauging and drawing assembly 120 and a support base 130. These can be the subject of numerous modes of realization known per se. They will therefore not be described in detail by the after.

On notera simplement que pour l'essentiel, l'ensemble de jaugeage et de puisage 120 comprend une pompe et un moyen de détection du niveau de carburant dans le réservoir, par exemple à commande par flotteur, tandis que l'embase support 130 comprend un plateau 132 adapté pour être fixé de manière étanche sur une paroi du réservoir et qui est traversé d'une part par des tubulures liées à la pompe et d'autre part par des liaisons reliées au moyen de détection de niveau.It will simply be noted that for the most part, the gauging assembly and drawing 120 comprises a pump and a level detection means fuel in the tank, for example float operated, while that the support base 130 comprises a plate 132 adapted to be fixed tightly on a wall of the tank and which is crossed on the one hand by pipes connected to the pump and on the other hand by connections connected to the level detection means.

On va dans la suite de la description décrire uniquement les moyens de guidage spécifiques, conformes à la présente invention, définis entre l'embase support 130 et l'ensemble de jaugeage et de puisage 120.We will in the following description describe only the means of specific guidance, in accordance with the present invention, defined between the support base 130 and the gauging and drawing assembly 120.

Comme on le voit sur la figure 3, l'embase support 130 est munie de deux chambres 140, 150 qui débouchent sur sa surface inférieure, en direction de l'ensemble 120.As can be seen in FIG. 3, the support base 130 is provided with two chambers 140, 150 which open on its lower surface, in direction of the whole 120.

Ces deux chambres 140 et 150 sont centrées sur des axes parallèles 145, 155. These two chambers 140 and 150 are centered on parallel axes 145, 155.

L'une 150 des deux chambres possède une section droite circulaire de révolution et constante sur toute sa longueur.One 150 of the two chambers has a circular cross section of revolution and constant over its entire length.

L'autre chambre 140 possède par contre une section oblongue et constante sur toute sa longueur.The other chamber 140, on the other hand, has an oblong section and constant over its entire length.

Comme on l'a illustré sur la figure 4 de préférence la section droite de cette chambre 140 est délimitée par deux secteurs circulaires 141, 142 reliés entre eux par deux méplats 143, 144 parallèles entre eux. De préférence ces deux méplats 143, 144 sont parallèles au plan défini par les axes 145, 155 des deux chambres 140, 150.As illustrated in FIG. 4, preferably the cross section of this chamber 140 is delimited by two circular sectors 141, 142 interconnected by two flats 143, 144 parallel to each other. Of preferably these two flats 143, 144 are parallel to the plane defined by the axes 145, 155 of the two chambers 140, 150.

L'ensemble de puisage 120 est quant à lui muni à son sommet de deux fûts 122 et 124 adaptés pour être engagés respectivement dans les chambres 140 et 150.The drawing assembly 120 is in turn provided at its top with two drums 122 and 124 adapted to be engaged respectively in the rooms 140 and 150.

Comme on le voit sur la figure 3, de préférence chacun des fûts 122, 124 est muni d'une excroissance 123, 125 en forme de calotte sphérique, au voisinage de son extrémité supérieure.As can be seen in FIG. 3, preferably each of the drums 122, 124 is provided with a protrusion 123, 125 in the form of a spherical cap, near its upper end.

La section droite des fûts 122, 124 est quant à elle inférieure à celle des chambres 140, 150.The cross section of the drums 122, 124 is less than that of the rooms 140, 150.

L'excroissance 125 possède un diamètre complémentaire du diamètre de la chambre 150. Ainsi l'excroissance 125 et le fût 124 associés sont susceptibles d'une translation à l'intérieur de la chambre 150 selon l'axe de celle-ci, dans une direction généralement verticale et/ou d'un rotulage par rapport à celle-ci autour du centre de l'excroissance 125.The outgrowth 125 has a diameter complementary to the diameter of chamber 150. Thus the projection 125 and the barrel 124 associated are susceptible of translation inside the chamber 150 along the axis of this, in a generally vertical direction and / or of a swiveling by relation to this around the center of the outgrowth 125.

L'excroissance 123 possède un diamètre complémentaire de la distance séparant les deux méplats 143 et 144. Ainsi l'excroissance 123 et le fût 122 associés sont susceptibles d'une translation à l'intérieur de la chambre 140 et/ou d'un débattement par rapport à celle-ci transversalement à l'axe 145 et parallèlement aux méplats 143, 144. De ce fait la coopération définie entre le rotule 123 et la chambre 140 assure une indexation de l'ensemble 120 par rapport à l'embase 130.The outgrowth 123 has a diameter complementary to the distance separating the two flats 143 and 144. Thus the protrusion 123 and the barrel 122 associates are susceptible of translation inside the chamber 140 and / or a deflection relative thereto transversely to the axis 145 and parallel to the flats 143, 144. Therefore the defined cooperation between the ball joint 123 and the chamber 140 ensures indexing of the assembly 120 relative to the base 130.

Cette structure de guidage conforme à la présente invention permet un guidage précis de l'ensemble 120 autorisant un appui permanent de ce dernier par sa surface inférieure, sur le fond du réservoir, quelles que soient les déformations de ce fond (rotation et/ou translation) et/ou son inclinaison par rapport à la paroi du réservoir qui porte l'embase 130, comme on l'a schématisé sur la figure 6.This guide structure according to the present invention allows a precise guidance of the assembly 120 allowing permanent support of this the latter by its lower surface, on the bottom of the tank, whatever the deformations of this bottom (rotation and / or translation) and / or its inclination relative to the wall of the tank which carries the base 130, as we have shown schematically in Figure 6.

On notera par ailleurs que de préférence les fûts 122, 124 sont creux et reçoivent des colonnes descendantes 146, 156 solidaires du fond des chambres 140, 150 et centrées sur celles-ci.It should also be noted that preferably the drums 122, 124 are hollow and receive descending columns 146, 156 secured to the bottom of the rooms 140, 150 and centered on them.

Ces colonnes 146, 156 servent de support central à des ressorts spiraux 147, 157 intercalés entre l'embase 130 et l'ensemble 120, pour solliciter ce dernier vers le fond du réservoir.These columns 146, 156 serve as central support for spiral springs 147, 157 interposed between the base 130 and the assembly 120, to request this last towards the bottom of the tank.

Plus précisément encore, les ressorts 147, 157 prennent appui respectivement sur le fond des chambres 140, 150 et sur des décrochements 148, 158 formés à l'intérieur des fûts 122, 124.More precisely still, the springs 147, 157 are supported respectively on the bottom of chambers 140, 150 and on recesses 148, 158 formed inside the barrels 122, 124.

On a illustré sur la figure 5 une variante de réalisation selon laquelle les colonnes 146, 156 solidaires de l'embase 130 et servant à guider les ressorts 147, 157 sont remplacées par des colonnes montantes 1460, 1560 solidaires du sommet des fûts 122, 124, et émergeant au delà des excroissances sphériques 123, 125, pour assurer la même fonction de guidage des ressorts 147, 157.FIG. 5 illustrates an alternative embodiment according to which the columns 146, 156 integral with the base 130 and serving to guide the springs 147, 157 are replaced by risers 1460, 1560 integral with the top of the barrels 122, 124, and emerging beyond the spherical protuberances 123, 125, to ensure the same function of spring guide 147, 157.

De préférence les colonnes 146, 156 et 1460, 1560 précitées sont tronconiques, effilées en éloignement de leur support, pour ne pas perturber le déplacement relatif précité entre l'embase 130 et l'ensemble 120.Preferably the above-mentioned columns 146, 156 and 1460, 1560 are tapered, tapered away from their support, so as not to disturb the aforementioned relative displacement between the base 130 and the assembly 120.

Le dispositif conforme à la présente invention offre en particulier les avantages suivants.The device according to the present invention offers in particular the following advantages.

Il permet de compenser tous les défauts du réservoir, en particulier toutes les déformations du fond de celui-ci, en garantissant que l'ensemble 120 repose en permanence sur ce fond.It compensates for all tank faults, in particular all the deformations of the bottom of it, ensuring that the whole 120 rests permanently on this background.

De plus le dispositif conforme à la présente invention permet de maintenir une indexation de l'ensemble 120 par rapport à l'embase support 130. Ainsi la présente invention permet de contrôler avec précision le trajet du flotteur de jaugeage et d'éviter toute collision de ce flotteur avec les parois du réservoir. Ceci est particulièrement important avec les réservoirs exploités de nos jours du fait que ces réservoirs ont souvent des formes complexes adaptées pour occuper au mieux la place disponible dans l'infrastructure du véhicule. In addition, the device according to the present invention makes it possible to maintain an indexing of the assembly 120 relative to the support base 130. Thus the present invention makes it possible to precisely control the path of the gauging float and avoid any collision of this float with the tank walls. This is especially important with tanks exploited nowadays because these tanks often have forms complexes adapted to best occupy the space available in vehicle infrastructure.

La présente invention permet également de faciliter le montage des dispositifs de jaugeage et de puisage, puisqu'elle permet de monter séparément et successivement l'ensemble de jaugeage et de puisage 120 et l'embase 130.The present invention also makes it possible to facilitate the mounting of gauging and drawing devices, since it allows mounting separately and successively the gauging and drawing assembly 120 and the base 130.

On notera qu'il est important dans le cadre de la présente invention, qu'il n'existe pratiquement pas de jeu entre la rotule sphérique 125 et la paroi de la chambre 150 d'une part et entre la rotule sphérique 123 et les méplats 143, 144 d'autre part. Ce jeu est typiquement inférieur à 0,25mm dans le cadre de la présente invention.Note that it is important in the context of the present invention, that there is practically no clearance between the ball joint 125 and the wall of the chamber 150 on the one hand and between the spherical ball joint 123 and the flats 143, 144 on the other hand. This clearance is typically less than 0.25mm in the part of the present invention.

Bien entendu la présente invention n'est pas limitée aux modes de réalisation particuliers qui viennent d'être décrits, mais s'étend à toutes variantes conformes à son esprit.Of course, the present invention is not limited to the modes of particular achievements which have just been described, but extends to all variants according to his spirit.

Ainsi par exemple selon une variante de réalisation, on peut envisager d'inverser la disposition des moyens de guidage, en prévoyant par exemple l'une au moins des rotules 123 et/ou 125 sur l'embase 130 et la chambre complémentaire 140, 150 sur l'ensemble de jaugeage et de puisage 120.Thus, for example according to an alternative embodiment, one can envisage to reverse the arrangement of the guide means, by providing for example at least one of the ball joints 123 and / or 125 on the base 130 and the chamber complementary 140, 150 on the gauging and drawing assembly 120.

Selon une autre variante de réalisation, la rotule 123 et la chambre 140 associée, pourrait être remplacée par un guide centrale rectiligne 1400 solidaire de l'un de l'ensemble 120 ou de l'embase 130 et définissant la direction de débattement autorisé et deux portées d'appui latérales 1230, par exemple en forme de calottes de sphériques solidaires de l'autre de l'embase 130 ou de l'ensemble 120 et reposant sur ledit guide 1400, comme on l'a schématisé sur la figure 7.According to another alternative embodiment, the ball joint 123 and the chamber 140 associated, could be replaced by a straight central guide 1400 integral with one of the assembly 120 or the base 130 and defining the direction of travel allowed and two lateral bearing surfaces 1230, for example in the form of spherical caps integral with each other the base 130 or of the assembly 120 and resting on said guide 1400, as shown schematically in Figure 7.

Selon encore une autre variante de réalisation, la direction de débattement autorisé, définie par exemple par les méplats 143, 144 parallèles entre eux, peut ne pas être parallèle au plan défini par les axes des chambres 140, 150, mais inclinée par rapport à ce plan.According to yet another alternative embodiment, the management of authorized travel, defined for example by flats 143, 144 parallel to each other, may not be parallel to the plane defined by the axes rooms 140, 150, but inclined relative to this plane.

Selon encore une autre variante de réalisation, comme illustré sur la figure 8 annexée, l'un au moins des ensembles de guidage peut définir une liaison hydraulique entre l'ensemble de jaugeage 120 et l'embase support 130. Cette liaison hydraulique est de préférence définie par l'ensemble de guidage qui assure la translation et le rotulage relatif. On aperçoit ainsi sur la figure 8, une tubulure creuse 156 solidaire de l'embase support 130 et qui plonge dans un fut 124 solidaire de l'ensemble de jaugeage 120. Ainsi le volume interne de la tubulure 156 communique avec le volume interne du fut 124. La géométrie de l'extrémité supérieure du fut 124 est adaptée pour assurer une translation et un rotulage relatif par rapport à la tubulure 156. Il est par ailleurs prévu des moyens d'étanchéité, tels qu'un joint torique 170, de préférence à compression radiale, entre la tubulure 156 et le fut 124. Ce joint 170 est de préférence prévu au plus prêt du centre de rotulage.According to yet another alternative embodiment, as illustrated in the Figure 8 attached, at least one of the guide assemblies can define a hydraulic connection between the gauging assembly 120 and the support base 130. This hydraulic connection is preferably defined by the assembly of guide which ensures translation and relative swiveling. We can thus see on Figure 8, a hollow tube 156 secured to the support base 130 and which plunges into a tank 124 integral with the gauging assembly 120. Thus the internal volume of tubing 156 communicates with the internal volume of the fut 124. The geometry of the upper end of fut 124 is suitable for ensure translation and relative swiveling relative to the pipe 156. It sealing means are also provided, such as an O-ring 170, preferably with radial compression, between tubing 156 and was 124. This seal 170 is preferably provided as close as possible to the swiveling center.

Une telle liaison hydraulique peut être utilisée par exemple pour acheminer du carburant à partir d'une pompe située dans un réservoir vers des injecteurs ou vers un carburateur.Such a hydraulic connection can be used for example for deliver fuel from a pump located in a tank to injectors or to a carburetor.

Claims (15)

Système de jaugeage et de puisage de carburant pour réservoir de véhicule automobile, comprenant une embase support (130) destinée à être fixée sur une paroi de réservoir et un ensemble (120) de jaugeage et de puisage monté à déplacement sur l'embase support (130) et sollicité vers le fond du réservoir, par rapport à cette embase, caractérisé par le fait que les moyens de liaison entre l'embase support (130) et l'ensemble (120) de jaugeage et de puisage comprennent au moins deux ensembles de guidage autorisant l'un (125, 150) une translation et un rotulage relatif et l'autre (123, 140) une translation et un débattement selon un plan passant pas l'axe de translation associé (144).Fuel tank gauging and drawing system of a motor vehicle, comprising a support base (130) intended for be fixed on a tank wall and a gauging assembly (120) and of draw-off mounted on the support base (130) and biased towards the bottom of the tank, relative to this base, characterized by the fact that the connecting means between the support base (130) and the assembly (120) gauging and drawing include at least two sets of guide authorizing one (125, 150) a translation and a relative swiveling and the other (123, 140) a translation and a displacement according to a passing plane not the associated translation axis (144). Système selon la revendication 1, caractérisé par le fait que le plan de débattement passe également par l'axe de translation (155) du premier ensemble de guidage (125, 150).System according to claim 1, characterized in that the travel plane also passes through the translation axis (155) of the first guide assembly (125, 150). Système selon l'une des revendications 1 ou 2 , caractérisé par le fait que le premier ensemble de guidage (125, 150) comprend une rotule sphérique (125) solidaire de l'un de l'ensemble de jaugeage et de puisage (120) ou de l'embase (130), engagée dans une chambre (150) de section circulaire complémentaire formée dans l'autre de l'embase (130) ou de l'ensemble de jaugeage et de puisage (120).System according to one of claims 1 or 2, characterized by causes the first guide assembly (125, 150) to include a ball joint spherical (125) integral with one of the gauging and drawing-off assembly (120) or the base (130), engaged in a section chamber (150) complementary circular formed in the other of the base (130) or the gauging and drawing assembly (120). Système selon l'une des revendications 1 à 3, caractérisé par le fait que le second ensemble de guidage (123, 140) comprend une structure (123) solidaire de l'un de l'ensemble de jaugeage et de puisage (120) ou de l'embase (130), engagée dans une chambre (140) de section oblongue formée dans l'autre de l'embase (130) ou de l'ensemble de jaugeage et de puisage (120).System according to one of Claims 1 to 3, characterized by the that the second guide assembly (123, 140) includes a structure (123) integral with one of the gauging and drawing assembly (120) or the base (130), engaged in a chamber (140) of oblong section formed in the other of the base (130) or of the gauging and drawing (120). Système selon la revendication 4 , caractérisé par le fait que ladite structure est formée d'une rotule sphérique (123) adaptée pour être susceptible de débattement dans la chambre associée (140).System according to claim 4, characterized in that the said structure is formed by a spherical ball joint (123) adapted to be susceptible of travel in the associated chamber (140). Système selon l'une des revendications 4 ou 5 , caractérisé par le fait que la section droite de la chambre (140) du second ensemble de guidage est délimitée par deux secteurs circulaires (141, 142) reliés entre eux par deux méplats (143, 144) parallèles entre eux.System according to one of claims 4 or 5, characterized by causes the cross section of the chamber (140) of the second set of guide is delimited by two circular sectors (141, 142) connected between them by two flats (143, 144) parallel to each other. Système selon la revendication 6, caractérisé par le fait que les deux méplats (143, 144) sont parallèles au plan défini par les axes (145, 155) des deux chambres (140, 150).System according to claim 6, characterized in that the two flats (143, 144) are parallel to the plane defined by the axes (145, 155) of the two chambers (140, 150). Système selon l'une des revendications 1 à 3, caractérisé par le fait que le second ensemble de guidage (123, 140) comprend un guide centrale rectiligne (1400) solidaire de l'un de l'ensemble (120) ou de l'embase (130) et définissant la direction de débattement autorisé et deux portées d'appui latérales (1230), par exemple en forme de calottes de sphériques solidaires de l'autre de l'embase (130) ou de l'ensemble (120) et reposant sur ledit guide (1400).System according to one of Claims 1 to 3, characterized by the causes the second guide assembly (123, 140) to include a guide rectilinear central unit (1400) integral with one of the assembly (120) or the base (130) and defining the direction of authorized clearance and two lateral bearing surfaces (1230), for example in the form of caps spherical integral with the other of the base (130) or of the assembly (120) and resting on said guide (1400). Système selon l'une des revendications 1 à 8, caractérisé par le fait qu'il comprend en outre des moyens élastiques (147, 157) intercalés entre l'embase (130) et l'ensemble (120), pour solliciter ce dernier vers le fond du réservoir.System according to one of Claims 1 to 8, characterized by the fact that it further comprises elastic means (147, 157) interposed between the base (130) and the assembly (120), to urge the latter towards the tank bottom. Système selon l'une des revendications 1 à 9, caractérisé par le fait que le jeu au niveau des deux ensembles de guidage (123, 140 ; 125, 150) est inférieur à 0,25mm.System according to one of Claims 1 to 9, characterized by the that the clearance at the two guide assemblies (123, 140; 125, 150) is less than 0.25mm. Système selon l'une des revendications 1 à 10, caractérisé par le fait que l'un au moins des ensembles de guidage (124, 156) définit une liaison hydraulique.System according to one of claims 1 to 10, characterized by the that at least one of the guide assemblies (124, 156) defines a hydraulic connection. Système selon la revendication 11, caractérisé par le fait que la liaison hydraulique est formée par l'ensemble de guidage (124, 156) qui assure la translation et le rotulage.System according to claim 11, characterized in that the hydraulic connection is formed by the guide assembly (124, 156) which provides translation and swiveling. Système selon l'une des revendications 11 ou 12, caractérisé par le fait qu'il est prévu des moyens d'étanchéité (170) entre deux tronçons de conduit (124, 156) formant un ensemble de guidage et définissant une liaison hydraulique.System according to one of claims 11 or 12, characterized by the fact that sealing means (170) are provided between two sections of conduit (124, 156) forming a guide assembly and defining a hydraulic connection. Système selon la revendication 13, caractérisé par le fait que les moyens d'étanchéité (170) sont placés à proximité du centre de rotulage. System according to claim 13, characterized in that the sealing means (170) are placed near the center of swiveling. Réservoir de carburant pour véhicule automobile, caractérisé par le fait qu'il comprend un système de jaugeage et de puisage conforme à l'une des revendications 1 à 14.Fuel tank for a motor vehicle, characterized by the fact that it includes a gauging and drawing system in accordance with one of claims 1 to 14.
EP19990401451 1998-06-16 1999-06-14 Fuel gauging and drawing system for automotive vehicle fuel tank and tank equipped therewith Expired - Lifetime EP0965748B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9807575 1998-06-16
FR9807575A FR2779773B1 (en) 1998-06-16 1998-06-16 FUEL GAUGE AND PUMP SYSTEM FOR MOTOR VEHICLE RESERVOIR AND RESERVOIR THUS EQUIPPED

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EP0965748A1 true EP0965748A1 (en) 1999-12-22
EP0965748B1 EP0965748B1 (en) 2003-01-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009040181A1 (en) * 2007-09-21 2009-04-02 Robert Bosch Gmbh Fuel delivery module
DE10228760B4 (en) 2001-06-29 2019-05-16 Denso Corporation Fuel supply device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750081A1 (en) * 1977-11-09 1979-05-10 Rau Swf Autozubehoer Fuel pump for motor vehicle - is fitted inside tank suspended from tank closure
EP0297256A2 (en) * 1987-07-03 1989-01-04 Pierburg Gmbh Fuel supply device
EP0459556A1 (en) * 1990-06-01 1991-12-04 General Motors Corporation Modular fuel delivery apparatus
EP0705971A1 (en) * 1994-10-04 1996-04-10 Robert Bosch Gmbh Device for feeding fuel from a fuel tank of a motor vehicle to its internal combustion engine
US5522425A (en) * 1993-10-28 1996-06-04 Bayerische Motoren Werke Ag Delivery unit with fuel tank level transmitter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750081A1 (en) * 1977-11-09 1979-05-10 Rau Swf Autozubehoer Fuel pump for motor vehicle - is fitted inside tank suspended from tank closure
EP0297256A2 (en) * 1987-07-03 1989-01-04 Pierburg Gmbh Fuel supply device
EP0459556A1 (en) * 1990-06-01 1991-12-04 General Motors Corporation Modular fuel delivery apparatus
US5522425A (en) * 1993-10-28 1996-06-04 Bayerische Motoren Werke Ag Delivery unit with fuel tank level transmitter
EP0705971A1 (en) * 1994-10-04 1996-04-10 Robert Bosch Gmbh Device for feeding fuel from a fuel tank of a motor vehicle to its internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10228760B4 (en) 2001-06-29 2019-05-16 Denso Corporation Fuel supply device
WO2009040181A1 (en) * 2007-09-21 2009-04-02 Robert Bosch Gmbh Fuel delivery module
US8353422B2 (en) 2007-09-21 2013-01-15 Robert Bosch Gmbh Fuel delivery module

Also Published As

Publication number Publication date
EP0965748B1 (en) 2003-01-29
DE69905097D1 (en) 2003-03-06
FR2779773A1 (en) 1999-12-17
DE69905097T2 (en) 2003-10-09
FR2779773B1 (en) 2000-09-01

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