WO1998045585A1 - Motor vehicle exhaust pipe attachment - Google Patents

Motor vehicle exhaust pipe attachment Download PDF

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Publication number
WO1998045585A1
WO1998045585A1 PCT/FR1998/000681 FR9800681W WO9845585A1 WO 1998045585 A1 WO1998045585 A1 WO 1998045585A1 FR 9800681 W FR9800681 W FR 9800681W WO 9845585 A1 WO9845585 A1 WO 9845585A1
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WO
WIPO (PCT)
Prior art keywords
spider
exhaust pipe
cross
hanger
branches
Prior art date
Application number
PCT/FR1998/000681
Other languages
French (fr)
Inventor
Pierre Allaire
Sylvain Sauvage
Jean-Pierre Monneau
Original Assignee
Hutchinson
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 Hutchinson filed Critical Hutchinson
Publication of WO1998045585A1 publication Critical patent/WO1998045585A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1822—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration for fixing exhaust pipes or devices to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/035—Noise absorbers in the form of specially adapted hangers or supports

Definitions

  • the present invention relates to a hanger for exhaust pipe of a motor vehicle, comprising an upper frame suitable for being secured to the vehicle body and a lower frame suitable for being secured to an exhaust pipe generally extending in the longitudinal direction X of the vehicle, these two reinforcements being connected to each other by an elastic system.
  • a hanger for exhaust manifold is characterized in that said elastic system comprises a spider of solid elastic material shaped and oriented so that its straight cross section through a transverse plane perpendicular to said longitudinal direction X generally has the shape of a Saint Andrew's cross, the ends of the four branches of which are subject, for two of them to said upper frame, for the other two to said lower frame, said spider being surrounded by at least one flexible ring resistant to traction, limiting its deformations. It was noticed that this form of spider made it possible to obtain a great stability of the elasticity characteristics of the hanger for large variations of the vibration frequencies, which means a rejection of the eigen modes towards the high frequencies. We also obtain the desired stiffness and damping in the Y and Z directions and also the low stiffness in X, which allows the hanger to properly absorb the thermal expansion of the tubing.
  • the flexible ring may limit the deflections only in the direction Z in the descending direction, in which case it will extend in the plane of said spider, or in the directions Z and Y in one or two directions (to the left and / or to the right in transverse direction), in which case it may extend in a plane perpendicular to that of said cross, by surrounding two opposite branches thereof.
  • FIG. 1 is a view of a hanger according to the invention in cross section along the line I-I of Figure 2;
  • FIG. 2 shows this hanger in section along line II-II of Figure 1, the flexible ring surrounding the spider extending in its plane;
  • - Figure 2a is a view similar to that of Figure 2 showing the deformation of the hanger in the axial direction;
  • - Figure 3 is a view of a variant hanger in cross section similar to that of Figure 1, along the line III-III of Figure 4, the flexible ring extending in a plane perpendicular to that of said spider ;
  • FIG. 4 is a side view of the hanger of Figure 3;
  • FIG. 5 is a view of another variant of the hanger, similar to that of Figure 3 but with two flexible rings each extending around two opposite branches of the spider, in planes both practically perpendicular between them and perpendicular to the plane of the cross;
  • FIG. 7 is a diagram showing comparatively the stiffness of known lines and the stiffness of lines according to one invention.
  • Figure 8 shows a variant in a view similar to that of Figure 3.
  • FIG. 9 is a top view of the variant of Figure 8, according to the arrows F.
  • the orientation of the hanger in space has been identified by the representation three axes perpendicular to each other: Z for the vertical direction, Y for the horizontal and transverse direction and X for the horizontal and axial direction (along the vehicle axis).
  • the reference 1 designates the body of the vehicle, 2 its exhaust pipe, 3 the cross in massive elastic material, with damping characteristics, this cross having the shape of a cross of Saint Andrew, shape which appears in the views according to the direction X.
  • the upper frame is constituted by a stirrup 4 which can be screwed at 5 to the body 1 and having a flat bottom 6 terminated by two ends 7 folded downwards, serving for the adhesion of the ends of the two corresponding branches 3a and 3b of the cross 3;
  • the lower frame consists of a flat iron 8 having in cross section a similar trough shape and on the folded ends 9 of which the ends of the two other corresponding branches 3'a and 3'b of the crosspiece 3 can be adhered
  • the spider 3 is surrounded by a single flexible ring resistant to traction.
  • this ring in the embodiment of Figures 1 and 2 this ring, referenced 10, extends in the plane of the spider 3; it is therefore in a vertical and transverse plane relative to the vehicle. It rests on the ends of the branches of the spider by the intermediary of the frames 6 and 8.
  • This flexible ring therefore makes it possible to limit the deflections of the tube 2 downwards, in the direction Z, but allows a large amplitude of the horizontal deflections - rate in direction Y. It also allows deflections in direction X, the cross-member 3 then bending to follow the expansions of the tube 2 under the effect of heat, as visible in FIG. 2a.
  • the flexible ring has been referenced 11 and extends in a plane perpendicular to that of the spider 3, located at 45 ° from the plane vertical passing through the axis of the spider.
  • This ring therefore surrounds two opposite branches 3b, 3'b of the spider, by means of the corresponding folded ends 7 and 9 of the frames 4 and 8.
  • This ring 11 is therefore specially intended to limit the deflections of the pipe 2 vertically towards the bottom and horizontally to the left in Figure 3, but with greater freedom of horizontal movement to the right.
  • the flexible rings can be made of any suitable deformable material, as long as it can have sufficient tensile strength: glass fibers impregnated with epoxy resin or the like can be used, for example.
  • the invention makes it possible to obtain great flexibility in the choice of the elastic characteristics of the hanger, from the same component elements.
  • Figure 7 is shown in solid lines the stiffness (in N / mm) of a hanger according to the invention, depending on the frequency of the vibrations of the tubing (in Hz); in dashed lines the same kind of response has been shown for a known hanger. We see that for the latter the stiffness increases considerably from 420 Hz while at this frequency the stiffness of a hanger according to the invention is still very low.
  • FIGS. 8 and 9 a variant with a single ring 11a has been shown, making it possible to obtain a limitation of the deformations of the cross-member 3 in compression under the effect of forces in the direction Z.
  • the upper reinforcement 4a is folded in V so as to match the upper hollow of the cross 3, and the lower frame 8a is subject to the exhaust pipe 2 by means of a screw 13 with a specific head 13a, suitable for serving as a support for the hollow lower cross 3.

Abstract

The invention concerns a motor vehicle exhaust pipe attachment, comprising a top fitting to be secured to the vehicle body and a bottom fitting to be secured to an exhaust pipe generally extending in the vehicle longitudinal direction X, said two fittings being mutually linked by an elastic system. Said attachment comprises a spider (3) made of massive shaped elastic material and oriented such that its transverse cross section through a transverse plane perpendicular to said longitudinal direction X has globally the shape of a St. Andrew's cross whereof the ends of the four branches are secured, two of them (3a, 3b) to said top fitting (4), and the other two (3'a, 3'b) to said bottom fitting (8), said spider (3) being enclosed by at least a flexible ring (10, 11, 12a, 12b) having tensile strength limiting its deformation.

Description

SUSPENTE POUR TUBULURE D'ECHAPPEMENT DE VEHICULE AUTOMOBILE SUSPENSION FOR MOTOR VEHICLE EXHAUST TUBING
La présente invention concerne une suspente pour tubulure d'échappement de véhicule automobile, comportant une armature supérieure propre à être assujettie à la caisse du véhicule et une armature inférieure propre à être assujettie à une tubulure d'échappement s 'étendant générale- ment dans la direction longitudinale X du véhicule, ces deux armatures étant reliées l'une à l'autre par un système élastique .The present invention relates to a hanger for exhaust pipe of a motor vehicle, comprising an upper frame suitable for being secured to the vehicle body and a lower frame suitable for being secured to an exhaust pipe generally extending in the longitudinal direction X of the vehicle, these two reinforcements being connected to each other by an elastic system.
Considérant la direction longitudinale X précitée, la direction transversale Y et la direction verticale Z, constituant les trois axes d'un système de référence orthonormé, ces suspentes doivent assurer la suspension fiable de la tubulure d'échappement à la caisse du véhicule avec limitation des débattements dans les directions Z et éventuellement Y. Pour limiter la transmission des vibra- tions entre la tubulure d ' échappement et la caisse du véhicule, les caractéristiques d'élasticité et d'amortissement de la suspente devront en outre assurer :Considering the above-mentioned longitudinal direction X, the transverse direction Y and the vertical direction Z, constituting the three axes of an orthonormal reference system, these lines must ensure the reliable suspension of the exhaust manifold to the vehicle body with limitation of travel in the Z and possibly Y directions. To limit the transmission of vibrations between the exhaust manifold and the vehicle body, the elasticity and damping characteristics of the hanger must also ensure:
- une grande souplesse de la suspente dans la direction Z, même sous précharge statique, avec un bon amortissement des vibrations et la rigidification la plus faible possible sous l'effet d'une augmentation de la fréquence de ces vibrations, ceci impliquant le rejet des modes propres à des fréquences élevées, supérieures à 400 Hz; - une faible raideur également dans la direction X pour encaisser les dilatations de la tubulure sans contraintes excessives ; et- great flexibility of the hanger in the Z direction, even under static preload, with good vibration damping and the lowest possible stiffening under the effect of an increase in the frequency of these vibrations, this implies rejection of modes specific to high frequencies, greater than 400 Hz; - a low stiffness also in the direction X to absorb the expansions of the tubing without excessive stresses; and
- une relative rigidité dans la direction Y.- relative rigidity in the Y direction.
Dans l'ensemble, les suspentes actuellement connues répondent à un ou plusieurs de ces critères mais pas à la totalité, et notamment ne permettent pas d'obtenir le rejet des modes propres à des fréquences suffisamment élevées.Overall, the lines currently known meet one or more of these criteria but not all, and in particular do not allow rejection proper modes at sufficiently high frequencies.
Le but de la présente invention est de résoudre ce problème, et à cet effet une suspente pour tubulure d'échappement conforme à la présente invention est caractérisée en ce que ledit système élastique comporte un croisillon de matériau élastique massif conformé et orienté de telle sorte que sa section transversale droite par un plan transversal perpendiculaire à ladite direction longitudinale X présente globalement la forme d ' une croix de Saint André dont les extrémités des quatre branches sont assujetties, pour deux d'entre elles à ladite armature supérieure, pour les deux autres à ladite armature inférieure, ledit croisillon étant entouré par au moins un anneau souple résistant à la traction, limitant ses déformations. On s'est aperçu que cette forme de croisillon permettait d'obtenir une grande stabilité des caractéristiques d'élasticité de la suspente pour de grandes variations des fréquences de vibration, ce qui signifie un rejet des modes propres vers les fréquences élevées . On obtient par ailleurs les rigidités et l'amortissement voulus dans les directions Y et Z et aussi la faible raideur en X, ce qui permet à la suspente de bien encaisser la dilatation thermique de la tubulure.The purpose of the present invention is to solve this problem, and for this purpose a hanger for exhaust manifold according to the present invention is characterized in that said elastic system comprises a spider of solid elastic material shaped and oriented so that its straight cross section through a transverse plane perpendicular to said longitudinal direction X generally has the shape of a Saint Andrew's cross, the ends of the four branches of which are subject, for two of them to said upper frame, for the other two to said lower frame, said spider being surrounded by at least one flexible ring resistant to traction, limiting its deformations. It was noticed that this form of spider made it possible to obtain a great stability of the elasticity characteristics of the hanger for large variations of the vibration frequencies, which means a rejection of the eigen modes towards the high frequencies. We also obtain the desired stiffness and damping in the Y and Z directions and also the low stiffness in X, which allows the hanger to properly absorb the thermal expansion of the tubing.
L'anneau souple, selon sa disposition et son orientation, pourra limiter les débattements seulement selon la direction Z dans le sens descendant, auquel cas il s'étendra dans le plan dudit croisillon, ou selon les directions Z et Y dans un ou deux sens (vers la gauche et/ou vers la droite en direction transversale), auquel cas il pourra s'étendre dans un plan perpendiculaire à celui dudit croisillon, en entourant deux branches opposées de celui-ci.The flexible ring, according to its arrangement and its orientation, may limit the deflections only in the direction Z in the descending direction, in which case it will extend in the plane of said spider, or in the directions Z and Y in one or two directions (to the left and / or to the right in transverse direction), in which case it may extend in a plane perpendicular to that of said cross, by surrounding two opposite branches thereof.
Pour la limitation des déplacements de la tubulure d'échappement à la fois dans les deux sens de la direction transversale, on pourra utiliser deux anneaux souples s ' étendant chacun autour de deux branches opposées du croisillon, dans des plans à la fois pratiquement perpendi- culaires entre eux et perpendiculaires au plan du croisillon.For limiting the displacements of the exhaust pipe both in the two directions of the transverse direction, it is possible to use two flexible rings each extending around two opposite branches of the spider, in planes both practically perpendicular between them and perpendicular to the plane of the cross.
Des modes d'exécution de l'invention sont décrits ci-dessous à titre d'exemples nullement limitatifs avec référence aux figures du dessin ci-annexé dans lequel :Embodiments of the invention are described below by way of non-limiting examples with reference to the figures of the attached drawing in which:
- la figure 1 est une vue d ' une suspente conforme à l'invention en coupe transversale selon la ligne I-I de la figure 2 ;- Figure 1 is a view of a hanger according to the invention in cross section along the line I-I of Figure 2;
- la figure 2 montre cette suspente en coupe selon la ligne II-II de la figure 1, l'anneau souple entourant le croisillon en s ' étendant dans son plan ;- Figure 2 shows this hanger in section along line II-II of Figure 1, the flexible ring surrounding the spider extending in its plane;
- la figure 2a est une vue analogue à celle de la figure 2 montrant la déformation de la suspente en direction axiale ; - la figure 3 est une vue d'une variante de suspente en coupe transversale analogue à celle de la figure 1, selon la ligne III-III de la figure 4, l'anneau souple s ' étendant dans un plan perpendiculaire à celui dudit croisillon ;- Figure 2a is a view similar to that of Figure 2 showing the deformation of the hanger in the axial direction; - Figure 3 is a view of a variant hanger in cross section similar to that of Figure 1, along the line III-III of Figure 4, the flexible ring extending in a plane perpendicular to that of said spider ;
- la figure 4 est une vue de profil de la suspente de la figure 3 ;- Figure 4 is a side view of the hanger of Figure 3;
- la figure 5 est une vue d ' une autre variante de suspente, analogue à celle de la figure 3 mais avec deux anneaux souples s ' étendant chacun autour de deux branches opposées du croisillon, dans des plans à la fois pratique- ment perpendiculaires entre eux et perpendiculaires au plan du croisillon ;- Figure 5 is a view of another variant of the hanger, similar to that of Figure 3 but with two flexible rings each extending around two opposite branches of the spider, in planes both practically perpendicular between them and perpendicular to the plane of the cross;
- la figure 6 est la vue de profil correspondante ;- Figure 6 is the corresponding side view;
- la figure 7 est un diagramme montrant comparativement la raideur des suspentes connues et la raideur de suspentes conformes à 1 ' invention ;- Figure 7 is a diagram showing comparatively the stiffness of known lines and the stiffness of lines according to one invention;
- la figure 8 montre une variante dans une vue analogue à celle de la figure 3 ; et- Figure 8 shows a variant in a view similar to that of Figure 3; and
- la figure 9 est une vue de dessus de la variante de la figure 8, selon les flèches F. Sur les différentes figures, l'orientation de la suspente dans l'espace a été repérée par la représentation des trois axes perpendiculaires entre eux : Z pour la direction verticale, Y pour la direction horizontale et transversale et X pour la direction horizontale et axiale (selon l'axe du véhicule). La référence 1 désigne la caisse du véhicule, 2 sa tubulure d'échappement, 3 le croisillon en matière élastique massive, à caractéristiques amortissantes, ce croisillon ayant la forme d'une croix de Saint André, forme qui apparaît dans les vues selon la direction X. Dans tous les modes de réalisation, l'armature supérieure est constituée par un étrier 4 pouvant être vissé en 5 à la caisse 1 et présentant un fond plat 6 terminé par deux extrémités 7 pliées vers le bas, servant à 1 ' adhérisation des extrémités des deux branches correspondantes 3a et 3b du croisillon 3; l'armature inférieure est constituée d'un fer plat 8 présentant en coupe transversale une forme en auge analogue et sur les extrémités pliées 9 duquel peuvent être adhéri- sées les extrémités des deux autres branches correspondantes 3'a et 3'b du croisillon 3. Dans les modes de réalisation des figures 1 à 4, le croisillon 3 est entouré par un seul anneau souple résistant à la traction. Dans le mode de réalisation des figures 1 et 2 cet anneau, référencé 10, s'étend dans le plan du croisillon 3 ; il est donc dans un plan vertical et transversal par rapport au véhicule. Il prend appui sur les extrémités des branches du croisillon par 1 ' intermédiaire des armatures 6 et 8. Cet anneau souple permet donc de limiter les débattements de la tubulure 2 vers le bas, dans la direction Z, mais autorise une grande amplitude des débattements horizon- taux dans la direction Y. Il autorise aussi les débattements en direction X, le croisillon 3 fléchissant alors pour suivre les dilatations de la tubulure 2 sous l'effet de la chaleur, comme visible sur la figure 2a.- Figure 9 is a top view of the variant of Figure 8, according to the arrows F. In the various figures, the orientation of the hanger in space has been identified by the representation three axes perpendicular to each other: Z for the vertical direction, Y for the horizontal and transverse direction and X for the horizontal and axial direction (along the vehicle axis). The reference 1 designates the body of the vehicle, 2 its exhaust pipe, 3 the cross in massive elastic material, with damping characteristics, this cross having the shape of a cross of Saint Andrew, shape which appears in the views according to the direction X. In all the embodiments, the upper frame is constituted by a stirrup 4 which can be screwed at 5 to the body 1 and having a flat bottom 6 terminated by two ends 7 folded downwards, serving for the adhesion of the ends of the two corresponding branches 3a and 3b of the cross 3; the lower frame consists of a flat iron 8 having in cross section a similar trough shape and on the folded ends 9 of which the ends of the two other corresponding branches 3'a and 3'b of the crosspiece 3 can be adhered In the embodiments of Figures 1 to 4, the spider 3 is surrounded by a single flexible ring resistant to traction. In the embodiment of Figures 1 and 2 this ring, referenced 10, extends in the plane of the spider 3; it is therefore in a vertical and transverse plane relative to the vehicle. It rests on the ends of the branches of the spider by the intermediary of the frames 6 and 8. This flexible ring therefore makes it possible to limit the deflections of the tube 2 downwards, in the direction Z, but allows a large amplitude of the horizontal deflections - rate in direction Y. It also allows deflections in direction X, the cross-member 3 then bending to follow the expansions of the tube 2 under the effect of heat, as visible in FIG. 2a.
Dans le mode de réalisation des figures 3 et 4, l'anneau souple a été référencé 11 et s'étend dans un plan perpendiculaire à celui du croisillon 3, situé à 45° du plan vertical passant par l'axe du croisillon. Cet anneau entoure donc deux branches opposées 3b, 3'b du croisillon, par 1 ' intermédiaire des extrémités pliées correspondantes 7 et 9 des armatures 4 et 8. Cet anneau 11 est donc spécialement destiné à limiter les débattements de la tubulure 2 verticalement vers le bas et horizontalement vers la gauche de la figure 3, mais avec une plus grande liberté de débattement horizontal vers la droite. Pour limiter les débattements dans ce sens également, on peut utiliser la disposition symétrique sur la même tubulure, ou utiliser la disposition des figures 5 et 6, avec deux anneaux souples 12a, 12b perpendiculaires entre eux en même temps que perpendiculaires au plan du croisillon 3. L ' un de ces anneaux entoure les branches 3a, 3'a, l'autre les branches 3b, 3'b, ceci encore par l'intermédiaire des extrémités des armatures 4 et 8. Les débattements de la tubulure 2 sont ainsi limités vers la gauche et vers la droite dans la direction Y, avec en même temps une limitation des débattements vers le bas.In the embodiment of Figures 3 and 4, the flexible ring has been referenced 11 and extends in a plane perpendicular to that of the spider 3, located at 45 ° from the plane vertical passing through the axis of the spider. This ring therefore surrounds two opposite branches 3b, 3'b of the spider, by means of the corresponding folded ends 7 and 9 of the frames 4 and 8. This ring 11 is therefore specially intended to limit the deflections of the pipe 2 vertically towards the bottom and horizontally to the left in Figure 3, but with greater freedom of horizontal movement to the right. To limit the deflections in this direction also, one can use the symmetrical arrangement on the same tubing, or use the arrangement of Figures 5 and 6, with two flexible rings 12a, 12b perpendicular to each other at the same time as perpendicular to the plane of the cross 3 One of these rings surrounds the branches 3a, 3'a, the other the branches 3b, 3'b, this again by means of the ends of the frames 4 and 8. The deflections of the tube 2 are thus limited to the left and to the right in the Y direction, at the same time limiting the deflections downwards.
Les anneaux souples peuvent être en toute matière déformable appropriée, dès lors qu'elle peut présenter une résistance suffisante à la traction : on peut utiliser par exemple des fibres de verre imprégnées de résine époxy ou analogue .The flexible rings can be made of any suitable deformable material, as long as it can have sufficient tensile strength: glass fibers impregnated with epoxy resin or the like can be used, for example.
Outre les avantages qui ressortent déjà de ce qui précède, l'invention permet d'obtenir une grande souplesse dans le choix des caractéristiques élastiques de la suspente, à partir des mêmes éléments composants. On peut obtenir aussi un effet batteur réglable, pour prolonger en quelque sorte la faible rigidité en fréquence de la suspente, comme cela est visible sur la figure 7, le réglage s 'effectuant par la détermination du poids du ou des anneaux. Sur la figure 7 on a représenté en trait plein la raideur (en N/mm) d'une suspente conforme à l'invention, en fonction de la fréquence des vibrations de la tubulure (en Hz) ; en tirets on a représenté le même genre de réponse pour une suspente connue. On voit que pour cette dernière la raideur augmente considérablement à partir de 420 Hz alors qu'à cette fréquence la raideur d ' une suspente conforme à 1 ' invention est encore très faible.In addition to the advantages which already emerge from the above, the invention makes it possible to obtain great flexibility in the choice of the elastic characteristics of the hanger, from the same component elements. One can also obtain an adjustable beating effect, to extend in a way the low rigidity in frequency of the hanger, as can be seen in FIG. 7, the adjustment being effected by determining the weight of the ring or rings. In Figure 7 is shown in solid lines the stiffness (in N / mm) of a hanger according to the invention, depending on the frequency of the vibrations of the tubing (in Hz); in dashed lines the same kind of response has been shown for a known hanger. We see that for the latter the stiffness increases considerably from 420 Hz while at this frequency the stiffness of a hanger according to the invention is still very low.
Aux figures 8 et 9 on a représenté une variante à anneau unique lia, permettant d'obtenir une limitation des déformations du croisillon 3 en compression sous l'effet des efforts dans la direction Z. A cet effet, l'armature supérieure 4a est pliée en V de sorte à épouser le creux supérieur du croisillon 3, et l'armature inférieure 8a est assujettie à la tubulure d'échappement 2 par l'intermédiaire d'une vis 13 à tête spécifique 13a, propre à servir d'appui au creux inférieur du croisillon 3. In FIGS. 8 and 9 a variant with a single ring 11a has been shown, making it possible to obtain a limitation of the deformations of the cross-member 3 in compression under the effect of forces in the direction Z. For this purpose, the upper reinforcement 4a is folded in V so as to match the upper hollow of the cross 3, and the lower frame 8a is subject to the exhaust pipe 2 by means of a screw 13 with a specific head 13a, suitable for serving as a support for the hollow lower cross 3.

Claims

REVENDICATIONS 1. Suspente pour tubulure d ' échappement de véhicule automobile, comportant une armature supérieure propre à être assujettie à la caisse du véhicule et une armature infé- rieure propre à être assujettie à une tubulure d'échappement s 'étendant généralement dans la direction longitudinale (X) du véhicule, ces deux armatures étant reliées l'une à l'autre par un système élastique, caractérisée en ce que ledit système élastique comporte un croisillon (3) de matériau élastique massif conformé et orienté de telle sorte que sa section transversale droite par un plan transversal perpendiculaire à ladite direction longitudinale (X) présente globalement la forme d'une croix de Saint André dont les extrémités des quatre branches sont assujetties, pour deux d'entre elles (3a, 3b) à ladite armature supérieure (4), pour les deux autres (3'a, 3'b) à ladite armature inférieure (8), ledit croisillon (3) étant entouré par au moins un anneau souple (10, 11, 12a, 12b) résistant à la traction, limitant ses déformations. CLAIMS 1. Hanger for exhaust pipe of a motor vehicle, comprising an upper frame suitable for being secured to the body of the vehicle and a lower frame suitable for being subject to an exhaust pipe generally extending in the longitudinal direction (X) of the vehicle, these two armatures being connected to each other by an elastic system, characterized in that said elastic system comprises a spider (3) of solid elastic material shaped and oriented so that its cross section straight by a transverse plane perpendicular to said longitudinal direction (X) generally has the shape of a cross of Saint Andrew whose ends of the four branches are subject, for two of them (3a, 3b) to said upper frame (4 ), for the other two (3'a, 3'b) to said lower frame (8), said spider (3) being surrounded by at least one flexible ring (10, 11, 12a, 12b) resistant to traction, limiting its deformations.
2. Suspente selon la revendication 1, caractérisée en ce que ledit anneau souple (10) s'étend dans le plan dudit croisillon (3).2. Hanger according to claim 1, characterized in that said flexible ring (10) extends in the plane of said spider (3).
3. Suspente selon la revendication 1, caractérisée en ce que ledit anneau souple (11) s'étend dans un plan perpendiculaire à celui dudit croisillon, en entourant deux branches opposées (3b, 3'b) de celui-ci.3. Hanger according to claim 1, characterized in that said flexible ring (11) extends in a plane perpendicular to that of said spider, surrounding two opposite branches (3b, 3'b) thereof.
4. Suspente selon la revendication 1, caractérisée en ce qu'elle comporte deux anneaux souples (12a, 12b) s ' étendant chacun autour de deux branches (3a, 3'a ; 3b, 3'b) opposées du croisillon, dans des plans à la fois pratiquement perpendiculaires entre eux et perpendiculaires au plan du croisillon (3).4. Hanger according to claim 1, characterized in that it comprises two flexible rings (12a, 12b) each extending around two branches (3a, 3'a; 3b, 3'b) opposite the cross, in planes both practically perpendicular to each other and perpendicular to the plane of the spider (3).
5. Suspente selon l'une quelconque des revendications précédentes, caractérisée en ce que le ou les anneaux souples prennent appui sur lesdites armatures supérieure et inférieure (4, 8). 5. Hanger according to any one of the preceding claims, characterized in that the flexible ring or rings bear on said upper and lower frames (4, 8).
6. Suspente selon 1 ' une quelconque des revendications précédentes, caractérisée en ce que ladite armature supérieure (4a) est pliée en V de sorte à épouser le creux supérieur dudit croisillon (3), et en ce que ladite armature inférieure (8a) est assujettie à ladite tubulure d'échappement (2) par l'intermédiaire d'une vis (13) à tête spécifique (13a), propre à servir d'appui au creux inférieur dudit croisillon (3). 6. Hanger according to any one of the preceding claims, characterized in that said upper frame (4a) is folded in a V so as to match the upper hollow of said spider (3), and in that said lower frame (8a) is secured to said exhaust pipe (2) by means of a screw (13) with a specific head (13a), suitable for serving as a support for the lower recess of said spider (3).
PCT/FR1998/000681 1997-04-04 1998-04-03 Motor vehicle exhaust pipe attachment WO1998045585A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR97/04136 1997-04-04
FR9704136A FR2761730B1 (en) 1997-04-04 1997-04-04 SUSPENSION FOR MOTOR VEHICLE EXHAUST TUBING

Publications (1)

Publication Number Publication Date
WO1998045585A1 true WO1998045585A1 (en) 1998-10-15

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Application Number Title Priority Date Filing Date
PCT/FR1998/000681 WO1998045585A1 (en) 1997-04-04 1998-04-03 Motor vehicle exhaust pipe attachment

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AR (1) AR012343A1 (en)
FR (1) FR2761730B1 (en)
WO (1) WO1998045585A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012203858A1 (en) * 2012-03-13 2013-09-19 Deere & Company Vibration bearing for an exhaust system in a motor vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811371B1 (en) 2000-07-10 2002-09-27 Hutchinson SUSPENSIONS FOR MOTOR VEHICLE EXHAUST LINES, AND VEHICLES EQUIPPED WITH SUCH HANGERS
FR2829972B1 (en) * 2001-09-25 2003-12-12 Renault MOTOR VEHICLE EXHAUST SYSTEM COMPRISING AN INERTIAL BATTERY

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2658358A1 (en) * 1976-12-23 1978-06-29 Volkswagenwerk Ag IC engine exhaust ducting noise insulating suspension - uses flexible, deformable insert embedded in rubber sleeve encompassing rhombic stay
EP0505325A1 (en) * 1991-02-15 1992-09-23 IVECO FIAT S.p.A. An exhaust-pipe mounting for commercial vehicles
EP0509918A1 (en) * 1991-04-18 1992-10-21 Hutchinson Elastic device for the suspension of a vibrating structure from a rigid structure
EP0529250A1 (en) * 1991-08-22 1993-03-03 Ford-Werke Aktiengesellschaft Elastic suspension for the exhaust device of a motor vehicle
DE4417651C1 (en) * 1994-05-20 1995-10-05 Audi Ag Elastic mounting for vehicle exhaust gas system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2658358A1 (en) * 1976-12-23 1978-06-29 Volkswagenwerk Ag IC engine exhaust ducting noise insulating suspension - uses flexible, deformable insert embedded in rubber sleeve encompassing rhombic stay
EP0505325A1 (en) * 1991-02-15 1992-09-23 IVECO FIAT S.p.A. An exhaust-pipe mounting for commercial vehicles
EP0509918A1 (en) * 1991-04-18 1992-10-21 Hutchinson Elastic device for the suspension of a vibrating structure from a rigid structure
EP0529250A1 (en) * 1991-08-22 1993-03-03 Ford-Werke Aktiengesellschaft Elastic suspension for the exhaust device of a motor vehicle
DE4417651C1 (en) * 1994-05-20 1995-10-05 Audi Ag Elastic mounting for vehicle exhaust gas system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012203858A1 (en) * 2012-03-13 2013-09-19 Deere & Company Vibration bearing for an exhaust system in a motor vehicle
US9051990B2 (en) 2012-03-13 2015-06-09 Deere & Company Vibration-absorbing mounting device

Also Published As

Publication number Publication date
AR012343A1 (en) 2000-10-18
FR2761730A1 (en) 1998-10-09
FR2761730B1 (en) 1999-06-25

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