WO1983002921A1 - Road motor vehicle - Google Patents

Road motor vehicle Download PDF

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Publication number
WO1983002921A1
WO1983002921A1 PCT/CH1983/000012 CH8300012W WO8302921A1 WO 1983002921 A1 WO1983002921 A1 WO 1983002921A1 CH 8300012 W CH8300012 W CH 8300012W WO 8302921 A1 WO8302921 A1 WO 8302921A1
Authority
WO
WIPO (PCT)
Prior art keywords
tires
wheels
pneumatic tires
pneumatic
wheel
Prior art date
Application number
PCT/CH1983/000012
Other languages
French (fr)
Inventor
Importateur S.A. Perrin
Jaroslaw Vinceslaw Maria Juhan
Original Assignee
Perrin Importateur
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
Priority claimed from CH97282A external-priority patent/CH645854A5/en
Application filed by Perrin Importateur filed Critical Perrin Importateur
Priority to AU11569/83A priority Critical patent/AU1156983A/en
Publication of WO1983002921A1 publication Critical patent/WO1983002921A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B11/00—Units comprising multiple wheels arranged side by side; Wheels having more than one rim or capable of carrying more than one tyre
    • B60B11/04—Wheels with a rim capable of carrying more than one tyre

Definitions

  • the present invention relates to road motor vehicles, more particularly but not exclusively, fast automobiles, such as limousine coupes for large tourism and sports and racing cars More generally, the invention relates to road motor vehicles capable of reaching a speed of at least 120 km / h, level.
  • the invention relates, more specifically, to the manner in which the pneumatic tires of these vehicles are arranged.
  • the characteristics of the pneumatic tires of the wheels of road motor vehicles play an essential role with regard to the handling of the vehicle and the grip of the wheels.
  • width of the profile of normal type tires is of the order of 0.8.
  • width of the profile of normal type tires is of the order of 0.8.
  • Pneumatic tires with a large cross-section also have the disadvantage of a high cost, as well as that of causing a significant reduction in ride comfort, compared with "normal" tires, the latter being the result of a poor shock absorption produced by irregularities in the road surface, due, in particular, to the fact that the sidewalls of wide-section tires are less high and less deformable than those of normal tires.
  • pneuma ⁇ tick off section, as well as the normal tires tend, at high speeds reached by the fast cars, to warm up to high tempé ⁇ r erasures which may cause sudden destruction of the tire and in any case shortens its life.
  • the object of the invention is to improve the handling of automobiles, in particular fast automobiles, in particular in tight turns taken at high speed, as well as the grip of tires on wet roads or
  • the invention also aims to reduce the cost price of the tire equipment of a fast automobile.
  • the invention aims to improve the driving comfort of fast and sporting cars and to reduce the intensity of heat from tires of cars, in particular sports cars and passenger cars. stroke, in case of prolonged rolling at high speed.
  • the invention aims to limit the risk of accident in the event of a puncture or burst of pneuma ⁇ tick, while avoiding the need to perform a wheel change on the spot in the event of a flat tire.
  • the invention provides a motor vehicle of the type comprising at least two front wheels and two rear wheels for supporting the vehicle body by means of suspension members, front wheels being orientable so as to allow the direction of the vehicle to be modified, this vehicle being characterized in that at least the two front wheels are each provided with a plurality of pneumatic tires.
  • all the wheels are each provided with a plurality of pneumatic tires.
  • Figure 1 is a schematic perspective view of a first embodiment of the vehicle according to the invention.
  • Figure 2 is a schematic perspective view of a part of the vehicle corresponding to the form of execution shown in Figure 1;
  • Figure 3 is a partial view, in section, of a vehicle wheel, according to a second embodiment
  • Figure 4 is a partial view, in section, of a vehicle wheel, in accordance with a third form of execution.
  • Figure 5 is a partial view of a wheel, similar to that shown in Figure 4, provided with a kind of pneumatic tire particularly suitable for use in the context of the invention.
  • the automobile represented in FIG. 1 comprises a bodywork 8, supported by two front wheels 9 and by two rear wheels 10.
  • the front wheels 9 and the rear wheels 10 are each provided with two pneumatic tires 11.
  • FIG. 2 represents a part of the automobile comprising one of the front wheels 9, fitted with two tires 11.
  • the axle of the wheel 9 is connected, in the usual manner, by a suspension triangle comprising two rigid bars 12 and 13 hinged together and a flexible bar 14, to an upright 17 forming part of the chassis of the automobile.
  • two articulated bars 15 and 16 connect the axis of the wheel 9 to the steering mechanism of the automobile (not shown) and make it possible to orient the wheel 9 to steer the automobile.
  • the wheel 9 supports the bodywork via a telescopic damper 20 and a helical spring 21.
  • the motor 18 is supported by the uprights 17 to which it is connected by fastening elements 19.
  • the wheel 9, shown in Figure 2 is, for example, arranged as shown in Figure 4 and described below.
  • the rim 1 of the wheel 6 forms a single piece, for example a molded piece of metal alloy , such as an alloy based on aluminum or magnesium, with the web 5 of the wheel 6 and has three profiles 2a, 2b and 2c on each of which is mounted a respective tire 3a, 3b and 3c.
  • the parts not shown of the wheel 6 are similar to the corresponding parts of the wheels of the usual type.
  • the neighboring tires, 3a and 3b, on the one hand, and 3b and 3c, on the other hand, are separated by spaces 4 and 4 r .
  • the improvement in grip on wet roads can be attributed to. the layer of water is easily "cut" by each tire, thanks to the narrowness
  • the rim of the wheel 6 ' has two profiles 2' a and 2'b, rigidly assembled on a support piece 7, integral with the web 5 'of the wheel 6'.
  • the part 7 and the veil 5 ′ may be, for example, constituted by a single part coming from a light alloy molding.
  • Each of the two profiles 2 'a and 2 r b allows the mounting of a respective pneuma ⁇ tick 3' a and 3 r b.
  • the fixing of the profiles 2 ′ a and 2 ⁇ b on the support piece 7 can be carried out in any suitable manner, for example by welding or by screwing.
  • the wheel runout could have come in one piece with the hub.
  • the wheel could be produced, not only in the form of a flat or openwork sail wheel, but also in the form of a spoke wheel, or also with a star arm, the ends of these arms being bent. to constitute support parts for rim profiles, these parts being similar, in section, to part 7 shown in FIG. 4, or having any other suitable shape.
  • the number of pneumatic tires with which each wheel is provided is not limited to two or three.
  • the front wheels can be provided with a Formula 1 racing car with three or four pneumatic tires and its rear wheels with five pneumatic tires.
  • the width of the rims it is generally of the same order as that of the rims normally used for the same kind of vehicle.
  • the pneumatic tires used in the context of the invention are therefore relatively narrow, their width being, for example, of the order of 10 to 12.5 cm.
  • these pneumatic tires have the advantage of greater flexibility resulting from the fact that their side walls are thinner than those of wide section tires and that their height / width ratio has a value approaching that of unit, these tires have the advantage of a simpler manufacture and, consequently, of a lower price than that of pneumatic tires with large section, in particular special pneumatic tires with extra large section.
  • each of the tires used improves the comfort of the vehicle thanks to better shock absorption resulting from irregularities in the road surface.
  • the handling of the vehicle is also improved, in particular in difficult conditions, in particular in tight turns and on slippery road, in particular in the event of snow or ice.
  • the temperature rises measured at different points of the tire, after prolonged use at high speed and under high mechanical stresses, are markedly reduced thanks to the use of wheels fitted with a plurality of pneumatic tires.
  • valves of each or some of the tires mounted on the same wheel can advantageously be connected to a common valve in order to facilitate the inflation or deflation of the tires, which is particularly practical in the case of automobiles in common use.
  • the invention does not include any limitation as regards the type of tire used.
  • tires having a shape such that their contact surface with the present road, seen in section, a rounded shape rather than a flattened shape has advantages because it makes it possible to reduce the rolling resistance without affecting road holding thanks to the presence of a plurality of tires for each wheel.
  • a pneumatic tire forming part of a plurality of tires mounted on a given wheel has an upper part, intended to come into contact with the road, having a section of general shape approximately triangular.
  • This shape makes it possible to reduce the rolling resistance in a straight line to a minimum, while, in a bend taken at high speed, the pneumatic tire deforms so as to come into contact with the road by one of the lateral faces of its profile. triangular, which allows to obtain a very good grip on the road.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

Fast road motor vehicle of which at least each of the front wheels is provided with a plurality of pneumatic tires. The periphery of the rim (1) has three profiles (2a, 2b, 2c), each of which allowing to mount one pneumatic tire (3a, 3b, 3c). The ratio height/total width of the assembly formed by using three pneumatic tires (3a, 3b, 3c) of a normal type, corresponds to the ratio height/width of a single pneumatic tire having a large cross-section. The invention allows to improve the road holding of the vehicle at high speeds, particularly on a slippery road. Furthermore, the risk of accidents in case of a puncture or the blow out of a tire is reduced and it is not necessary to change the wheel on the spot.

Description

VEHICULE ROUTIER AUTOMOBILE AUTOMOTIVE ROAD VEHICLE
La présente invention concerne les véhicules routiers automobiles, plus particulièrement mais non exclusivement, les automobiles rapides, telles que les coupés limousines de grand tourisme et les voitures de sport et de course Plus généralement, l'invention concerne les véhicules routiers automobiles capables d'atteindre une vitesse d'au moins 120 km/h, en palier.The present invention relates to road motor vehicles, more particularly but not exclusively, fast automobiles, such as limousine coupes for large tourism and sports and racing cars More generally, the invention relates to road motor vehicles capable of reaching a speed of at least 120 km / h, level.
L'invention porte, plus spécifiquement, sur la manière dont sont disposés les bandages pneumatiques de ces véhicules.The invention relates, more specifically, to the manner in which the pneumatic tires of these vehicles are arranged.
Les caractéristiques des bandages pneumatiques des roues des véhicules routiers automobiles jouent un rôle essentiel en ce qui concerne la tenue de route du véhicule et l'adhérence des roues. Dans le cas des automobiles rapides, il est indispensable, pour des raisons de sécurité évidentes, que la tenue de route à grande vitesse soit excellente et que l'adhérence des roues sur le revêtement routier soit très élevée.The characteristics of the pneumatic tires of the wheels of road motor vehicles play an essential role with regard to the handling of the vehicle and the grip of the wheels. In the case of fast cars, it is essential, for obvious safety reasons, that the road handling at high speed is excellent and that the grip of the wheels on the road surface is very high.
On a tendance, à l'heure actuelle, à munir les roues des automobiles rapides de bandages pneumatiques à section large ayant une grande surface de contact avec le sol. De tels pneumatiques présentent 1 'avantage d'avoir une excellente adhérence sur route sèche tout en assurant une remarquable tenue de route, en progrès notable par rapport à celle des pneumatiques à section plus étroite. Le rapport hauteur/largeur du profil des pneumatiques à section large est nettement inférieur à l'unité et il prend, par exemple, une valeur de 0,5 à 0,7 alors que le rapport hauteur/There is a tendency, at present, to provide the wheels of fast automobiles with pneumatic tires with a large cross section having a large surface in contact with the ground. Such tires have the advantage of having excellent grip on dry roads while ensuring remarkable road holding, a notable improvement over that of tires with a narrower section. The height / width ratio of the profile of wide section tires is considerably less than the unit and it takes, for example, a value of 0.5 to 0.7 while the height / width ratio
0-.--PI sfa__ vIFO .* largeur du profil des pneumatiques de type normal est de l'ordre de 0,8. En revanche, il s'est avéré que, sur route mouillée, les pneumatiques à section large sont facilement sujets au phénomène de perte d'adhérence dit d'"aqua- planing" ce qui limite considérablement la vitesse maximale que le véhicule peut atteindre en respectant des limites de sécurité suffisantes dans de telles conditions. On a cherché à atténuer cet inconvénient en conférant aux sculptures de la bande de roulement du pneumatique une forme destinée à favoriser l'élimination de l'eau entre le sol et cette bande ce roulement. Toutefois, les résultats atteints de cette manière ne sont guère satisfaisants et n'ont pas permis de résoudre le problème.0 -.-- PI sfa__ vIFO . * width of the profile of normal type tires is of the order of 0.8. On the other hand, it has been found that, on wet roads, wide section tires are easily subject to the phenomenon of loss of grip known as "aquaplaning" which considerably limits the maximum speed that the vehicle can reach in respecting sufficient safety limits in such conditions. We have sought to mitigate this drawback by giving the tread patterns of the tire a shape intended to promote the elimination of water between the ground and this tread. However, the results achieved in this way are hardly satisfactory and have not solved the problem.
Les bandages pneumatiques à section large présentent, en outre, l'inconvénient d'un coût élevé ainsi que celui d'entraîner une notable diminution du confort de roulement, par rapport au neumatiques "normaux", ce dernier inconvé¬ nient résultant d'un mauvais amortissement des chocs produits par les irrégularités du revêtement routier, en raison, notamment, du fait que les flancs des pneumatiques à section large sont moins hauts et moins déformables que ceux des pneumatiques normaux . D'autre part, les pneuma¬ tiques à section large, aussi bien que les pneumatiques normaux, ont tendance, aux vitesses élevées atteintes par les automobiles rapides, à s'échauffer jusqurà des tempé¬ ratures élevées ce qui risque de provoquer la destruction brusque du pneumatique et abrège de toute façon sa - durée de vie.Pneumatic tires with a large cross-section also have the disadvantage of a high cost, as well as that of causing a significant reduction in ride comfort, compared with "normal" tires, the latter being the result of a poor shock absorption produced by irregularities in the road surface, due, in particular, to the fact that the sidewalls of wide-section tires are less high and less deformable than those of normal tires. On the other hand, pneuma¬ tick off section, as well as the normal tires, tend, at high speeds reached by the fast cars, to warm up to high tempé¬ r erasures which may cause sudden destruction of the tire and in any case shortens its life.
L'invention a pour but d'améliorer la tenue de route des automobiles, en particulier des automobiles rapides, notam¬ ment dans les virages serrés pris à grande vitesse, ainsi que l'adhérence des pneumatiques sur route mouillée ouThe object of the invention is to improve the handling of automobiles, in particular fast automobiles, in particular in tight turns taken at high speed, as well as the grip of tires on wet roads or
O.V.PI même sur une route recouverte de neige ou de verglas.OVPI even on a road covered with snow or ice.
L'invention a également pour but de diminuer le prix de revient de l'équipement en pneumatiques d'une automobile rapide.The invention also aims to reduce the cost price of the tire equipment of a fast automobile.
En outre, l'invention a pour but d'améliorer le confort de roulement des automobiles rapides et sportives et de per¬ mettre de diminuer l'intensité de 1 'échauffe ent des pneumatiques des automobiles, notamment des voitures de sport et des voitures de course, en cas de roulement prolongé à vitesse élevée.In addition, the invention aims to improve the driving comfort of fast and sporting cars and to reduce the intensity of heat from tires of cars, in particular sports cars and passenger cars. stroke, in case of prolonged rolling at high speed.
D'autre part, l'invention a pour but de limiter le risque d'accident en cas de crevaison ou d'éclatement de pneuma¬ tique, tout en permettant d'éviter la nécessité d'effec¬ tuer un changement de roue sur place en cas de crevaison de pneumatique.On the other hand, the invention aims to limit the risk of accident in the event of a puncture or burst of pneuma¬ tick, while avoiding the need to perform a wheel change on the spot in the event of a flat tire.
En vue d'atteindre les objectifs indiqués ci-dessus, l'invention fournit un véhicule automobile du type compre¬ nant au moins deux roues avant et deux roues arrière pour supporter la carrosserie du véhicule par l'intermédiaire d'organes de suspension, les roues avant étant orientables de manière à permettre de modifier la direction du véhicule, ce véhicule étant caractérisé en ce qu'au moins les deux roues avant sont chacune munies d'une pluralité de bandages pneumatiques.In order to achieve the objectives indicated above, the invention provides a motor vehicle of the type comprising at least two front wheels and two rear wheels for supporting the vehicle body by means of suspension members, front wheels being orientable so as to allow the direction of the vehicle to be modified, this vehicle being characterized in that at least the two front wheels are each provided with a plurality of pneumatic tires.
Conformément à une forme d'exécution particulière du véhicule, toutes les roues sont chacune munies d'une pluralité de bandages pneumatiques.According to a particular embodiment of the vehicle, all the wheels are each provided with a plurality of pneumatic tires.
Les objectifs, résultats et avantages de l'invention apparaîtront plus clairement grâce à la description détaillée qui va suivre, donnée à titre d'exemple non limitatif, de formes d'exécution particulières de l'in¬ vention, en se référant aux dessins annexés, dans lesquels :The objectives, results and advantages of the invention will appear more clearly from the description detailed which will follow, given by way of nonlimiting example, of particular embodiments of the invention, with reference to the appended drawings, in which:
La figure 1 est une vue schématique, en perspective, d'une première forme d'exécution du véhicule selon l'invention;Figure 1 is a schematic perspective view of a first embodiment of the vehicle according to the invention;
la figure 2 est une vue schématique, en perspective, d'une partie du véhicule correspondant à la forme d'exé¬ cution représentée à la figure 1;Figure 2 is a schematic perspective view of a part of the vehicle corresponding to the form of execution shown in Figure 1;
la figure 3 est une vue partielle, en coupe, d'une roue du véhicule, selon une deuxième forme d'exécution;Figure 3 is a partial view, in section, of a vehicle wheel, according to a second embodiment;
la figure 4 est une vue partielle, en coupe, d'une roue du véhicule, conformément à une troisième forme d'exécu¬ tion; etFigure 4 is a partial view, in section, of a vehicle wheel, in accordance with a third form of execution; and
la figure 5 est une vue partielle d'une roue, similaire à celle qui est représentée à la figure 4, munie d'un genre de bandage pneumatique convenant particulièrement bien à l'usage dans le cadre de l'invention.Figure 5 is a partial view of a wheel, similar to that shown in Figure 4, provided with a kind of pneumatic tire particularly suitable for use in the context of the invention.
L'automobile représentée à la figure 1 comprend une carrosserie 8 , supportée par deux roues avant 9 et par deux roues arrière 10. Les roues avant 9 et les roues arrière 10 sont-chacune munies de deux bandages pneuma¬ tiques 11.The automobile represented in FIG. 1 comprises a bodywork 8, supported by two front wheels 9 and by two rear wheels 10. The front wheels 9 and the rear wheels 10 are each provided with two pneumatic tires 11.
La figure 2 représente une partie de l'automobile compre¬ nant l'une des roues avant 9, munie de deux pneumatiques 11. L'axe de la roue 9 est relié, de manière usuelle, par un triangle de suspension comprenant deux barres rigides 12 et 13 articulées entre elles et une barre flexible 14, à un montant 17 faisant partie du châssis de l'automobile. D'autre part, deux barres articulées 15 et 16 relient l'axe de la roue 9 au mécanisme de direction de l'automo¬ bile (non représenté) et permettent d'orienter la roue 9 pour diriger l'automobile. La roue 9 supporte la carros¬ serie par l'intermédiaire d'un amortisseur téléscopique 20 et d'un ressort hélicoïdal 21. Le moteur 18 est supporté par les montants 17 auxquels il est relié par des éléments d'attache 19.FIG. 2 represents a part of the automobile comprising one of the front wheels 9, fitted with two tires 11. The axle of the wheel 9 is connected, in the usual manner, by a suspension triangle comprising two rigid bars 12 and 13 hinged together and a flexible bar 14, to an upright 17 forming part of the chassis of the automobile. On the other hand, two articulated bars 15 and 16 connect the axis of the wheel 9 to the steering mechanism of the automobile (not shown) and make it possible to orient the wheel 9 to steer the automobile. The wheel 9 supports the bodywork via a telescopic damper 20 and a helical spring 21. The motor 18 is supported by the uprights 17 to which it is connected by fastening elements 19.
La roue 9, représentée à la figure 2, est, par exemple, agencée de la manière illustrée à la figure 4 et décrite ci-dessous.The wheel 9, shown in Figure 2, is, for example, arranged as shown in Figure 4 and described below.
Conformément à la forme d'exécution de la roue représentée à la figure 3, qui correspond au cas d'une roue munie de trois bandages pneumatiques, la jante 1 de la roue 6 forme une seule pièce, par exemple une pièce moulée en alliage métallique, tel qu'un alliage à base d'aluminium ou de magnésium, avec le voile 5 de la roue 6 et présente trois profils 2a, 2b et 2c sur chacun desquels est monté un pneumatique respectif 3a, 3b et 3c. Les parties non représentées de la roue 6 sont semblables aux parties correspondantes des roues de type habituel.In accordance with the embodiment of the wheel shown in FIG. 3, which corresponds to the case of a wheel provided with three pneumatic tires, the rim 1 of the wheel 6 forms a single piece, for example a molded piece of metal alloy , such as an alloy based on aluminum or magnesium, with the web 5 of the wheel 6 and has three profiles 2a, 2b and 2c on each of which is mounted a respective tire 3a, 3b and 3c. The parts not shown of the wheel 6 are similar to the corresponding parts of the wheels of the usual type.
Les pneumatiques voisins, 3a et 3b, d'une part, et 3b et 3c, d'autre part, sont séparés par des espaces 4 et 4r. Ceci permet à chaque pneumatique de conserver son comporte¬ ment propre, ce qui améliore les propriétés d'adhérence de l'ensemble de la roue, notamment sur route mouillée. L'amélioration de l'adhérence sur route mouillée peut être attribuée au. fait que la couche d'eau est facilement "coupée" par chacun des pneumatiques, grâce à l'étroitesseThe neighboring tires, 3a and 3b, on the one hand, and 3b and 3c, on the other hand, are separated by spaces 4 and 4 r . This allows each tire to keep its own behavior, which improves the grip properties of the entire wheel, especially on wet roads. The improvement in grip on wet roads can be attributed to. the layer of water is easily "cut" by each tire, thanks to the narrowness
OMPI relative de ceux-ci, l'eau ainsi chassée de la surface de contact entre le pneumatique et la route étant aisé¬ ment évacuée par les espaces 4 et 4 ' .WIPO relative of these, the water thus driven from the contact surface between the tire and the road being easily evacuated through the spaces 4 and 4 '.
Dans la forme d'exécution représentée à la figure 4, la jante de la roue 6' présente deux profils 2 'a et 2'b, rigidement assemblés sur une pièce support 7, solidaire du voile 5 ' de la roue 6 ' . La pièce 7 et le voile 5' peuvent être, par exemple, constitués par une seule pièce venue de moulage en alliage léger. Chacun des deux profils 2 'a et 2 rb permet le montage d'un pneuma¬ tique respectif 3 'a et 3 rb. La fixation des profils 2'a et 2 τb sur la pièce de support 7 peut être réalisée de toute manière appropriée, par exemple par soudage ou par vissage.In the embodiment shown in Figure 4, the rim of the wheel 6 'has two profiles 2' a and 2'b, rigidly assembled on a support piece 7, integral with the web 5 'of the wheel 6'. The part 7 and the veil 5 ′ may be, for example, constituted by a single part coming from a light alloy molding. Each of the two profiles 2 'a and 2 r b allows the mounting of a respective pneuma¬ tick 3' a and 3 r b. The fixing of the profiles 2 ′ a and 2 τ b on the support piece 7 can be carried out in any suitable manner, for example by welding or by screwing.
Outre les formes d'exécution représentées aux figures 3 et 4 , de nombreuses autres formes d'exécution de roue munies, chacune, d'une pluralité de bandages pneumatiques peuvent être envisagées dans le cadre de l'invention.In addition to the embodiments shown in FIGS. 3 and 4, numerous other embodiments of the wheel each provided with a plurality of pneumatic tires can be envisaged in the context of the invention.
Par exemple, le voile de la roue pourrait être venu d'une seule pièce avec le moyeu. D'autre part, la roue pourrait être réalisée, non seulement sous forme d'une roue à voile plat ou iajouré, mais également sous forme d'une roue à rayons, ou encore à bras en étoile, les extrémités de ces bras étant coudés pour constituer des pièces support de profils de jantes, ces pièces étant semblables, en coupe, à la pièce 7 représentée à la figure 4, ou ayant toute autre forme appropriée.For example, the wheel runout could have come in one piece with the hub. On the other hand, the wheel could be produced, not only in the form of a flat or openwork sail wheel, but also in the form of a spoke wheel, or also with a star arm, the ends of these arms being bent. to constitute support parts for rim profiles, these parts being similar, in section, to part 7 shown in FIG. 4, or having any other suitable shape.
Bien entendu, le nombre de bandages pneumatiques dont est muni chaque roue n'est pas limité à deux ou trois. En particulier, on peut munir les roues avant d'une voiture de course de formule 1 de trois ou quatre bandages pneumatiques et ses roues arrière de cinq bandages pneumatiques.Of course, the number of pneumatic tires with which each wheel is provided is not limited to two or three. In particular, the front wheels can be provided with a Formula 1 racing car with three or four pneumatic tires and its rear wheels with five pneumatic tires.
En ce qui concerne la largeur des jantes, elle est généra¬ lement du même ordre que celle des jantes normalement utilisées pour le même genre de véhicule. Les bandages pneumatiques utilisés dans le cadre de l'invention sont, par conséquent, relativement étroits, leur largeur étant, par exemple, de l'ordre de 10 à 12,5 cm. Outre le fait que de tels bandages pneumatiques présentent l'avantage d'une plus grande souplesse résultant du fait que leurs parois latérales sont plus minces que celles des pneus à section large et que leur rapport hauteur/largeur a une valeur se rapprochant de l'unité, ces pneumatiques présentent l'avantage d'une fabrication plus simple et, par conséquent, d'un prix inférieur à celui des bandages pneumatiques à section large, notamment des bandages pneumatiques spéciaux à section extra-large.As regards the width of the rims, it is generally of the same order as that of the rims normally used for the same kind of vehicle. The pneumatic tires used in the context of the invention are therefore relatively narrow, their width being, for example, of the order of 10 to 12.5 cm. Besides the fact that such pneumatic tires have the advantage of greater flexibility resulting from the fact that their side walls are thinner than those of wide section tires and that their height / width ratio has a value approaching that of unit, these tires have the advantage of a simpler manufacture and, consequently, of a lower price than that of pneumatic tires with large section, in particular special pneumatic tires with extra large section.
On constate en outre, que la plus grande souplesse de chacun des pneumatiques utilisés améliore le confort du véhicule grâce à un meilleur amortissement des chocs résultant des irrégularités du revêtement routier. La tenue de route du véhicule est également améliorée, en particulier dans des conditions difficiles, notamment dans les virages serrés et sur route glissante, notamment en cas de neige ou de verglas. On a également constaté, dans le cas des voitures de course, que les élévations de température mesurées en différents points du bandage pneu- - matique, après' utilisation prolongée à grande vitesse et sous des contraintes mécaniques élevées, sont nettement réduites grâce à l'utilisation de roues munies d'une pluralité de bandages pneumatiques. Du fait que les pneuma¬ tiques des roues équipées d'un seul bandage pneumatique doivent souvent travailler dans des conditions de tempéra¬ ture proche des limites supérieures admissibles, la limitation de l'élévation de température grâce à l'utili¬ sation d'une pluralité de bandages pneumatiques pour chaque roue apporte d*importants avantages en particulier en augmentant considérablement la durée de vie des pneumatiques et, par conséquent, la sécurité du véhicule.It can also be seen that the greater flexibility of each of the tires used improves the comfort of the vehicle thanks to better shock absorption resulting from irregularities in the road surface. The handling of the vehicle is also improved, in particular in difficult conditions, in particular in tight turns and on slippery road, in particular in the event of snow or ice. It has also been found, in the case of racing cars, that the temperature rises measured at different points of the tire, after prolonged use at high speed and under high mechanical stresses, are markedly reduced thanks to the use of wheels fitted with a plurality of pneumatic tires. Due to the fact that the tires on the wheels fitted with a single pneumatic tire often have to work under conditions of temperature close to the admissible upper limits, the limitation of the rise in temperature thanks to the use of a plurality of pneumatic tires for each wheel brings important advantages in particular by considerably increasing the life of the tires and, consequently, the safety of the vehicle.
L'emploi de plusieurs pneumatiques par roue, au lieu d'un seul, constitue, également, un élément de sécurité du fait que, en cas de crevaison ou d'éclatement de pneumatique, la tenue de route du véhicule n'est pas affectée puis¬ que, dans la presque totalité des cas, au moins un des bandages pneumatiques de la roue affectée reste en état de fonctionnement ce qui permet de se rendre en toute sécurité en un lieu approprié pour effectuer facilement un changement de roue. Ceci permet éventuellement, d'éliminer la néces¬ sité de transporter une roue de secours dans le véhicule.The use of several tires per wheel, instead of just one, also constitutes a safety factor since, in the event of a puncture or bursting of the tire, the road handling of the vehicle is not affected. since, in almost all cases, at least one of the pneumatic tires of the affected wheel remains in working condition which makes it possible to go safely to a suitable place to easily change the wheel. This eventually makes it possible to eliminate the need to transport a spare wheel in the vehicle.
Les valves de chacun ou de certains des pneumatiques montés sur une même roue peuvent être avantageusement reliées à une valve commune afin de faciliter le gonflage ou le dégonflage des pneus, ce qui est particulièrement pratique dans le cas des automobiles d'usage courant.The valves of each or some of the tires mounted on the same wheel can advantageously be connected to a common valve in order to facilitate the inflation or deflation of the tires, which is particularly practical in the case of automobiles in common use.
Bien entendu, l'invention ne comporte aucune limitation en ce qui concerne le genre de pneumatique utilisé. En parti¬ culier, on a constaté que des pneumatiques ayant une forme telle que leur surface de contact avec la route présente, vu en coupe, une forme arrondie plutôt qu'une forme aplatie, présente des avantages car elle permet de réduire la résistance au roulement sans affecter la tenue de route grâce à la présence d'une pluralité de pneumatiques pour chaque roue. Conformément à la forme d'exécution représen¬ tée à la figure 5, un bandage pneumatique faisant partie d'une pluralité de pneumatiques montés sur une roue donnée, présente une partie supérieure, destinée à venir en contact avec la route , ayant une section de forme générale approximativement triangulaire. Cette forme permet de réduire au minimum la résistance au roulement en ligne droite, alors que, dans un virage pris à vitesse élevée, le bandage pneumatique se déforme de façon à venir en contact avec la route par l'une des faces latérales de son profil triangulaire, ce qui permet l'obtention d'une très grande adhérence à la route. Of course, the invention does not include any limitation as regards the type of tire used. In particular, it has been found that tires having a shape such that their contact surface with the present road, seen in section, a rounded shape rather than a flattened shape, has advantages because it makes it possible to reduce the rolling resistance without affecting road holding thanks to the presence of a plurality of tires for each wheel. In accordance with the embodiment shown in FIG. 5, a pneumatic tire forming part of a plurality of tires mounted on a given wheel, has an upper part, intended to come into contact with the road, having a section of general shape approximately triangular. This shape makes it possible to reduce the rolling resistance in a straight line to a minimum, while, in a bend taken at high speed, the pneumatic tire deforms so as to come into contact with the road by one of the lateral faces of its profile. triangular, which allows to obtain a very good grip on the road.

Claims

REVENDICATIONS
1. Véhicule routier automobile comprenant au moins deux roues avant et deux roues arrière, supportant la carros¬ serie du véhicule par 1 'intermédiaire de moyens de suspension, les roues avant étant orientables, caractérisé par le fait qu'au moins chacune des roues avant est munie d'une pluralité de bandages pneumatiques.1. Motor road vehicle comprising at least two front wheels and two rear wheels, supporting the body of the vehicle by means of suspension means, the front wheels being steerable, characterized in that at least each of the front wheels is provided with a plurality of pneumatic tires.
2. Véhicule selon la revendication 1, caractérisé par le fait que toutes ses roues sont munies d'une pluralité de bandages pneumatiques.2. Vehicle according to claim 1, characterized in that all of its wheels are provided with a plurality of pneumatic tires.
3. Véhicule selon la revendication 1 ou la revendication 2, caractérisé par le fait que les roues munies d'une plura¬ lité de bandages pneumatiques comprennent chacune une seule jante présentant une pluralité de profils périphé¬ riques sur chacun desquels est monté un bandage pneuma¬ tique.3. Vehicle according to claim 1 or claim 2, characterized in that the wheels provided with a plurality of pneumatic tires each comprise a single rim having a plurality of peripheral profiles on each of which is mounted a pneumatic tire ¬ tick.
4. Véhicule selon la revendication 1 ou la revendication 2, caractérisé par le fait que les roues munies d'une plurali¬ té de bandages pneumatiques comprennent chacune une pluralité de jantes sur chacune desquelles est monté un bandage pneumatique, toutes les jantes d'une même roue étant rigidement assemblées entre elles.4. Vehicle according to claim 1 or claim 2, characterized in that the wheels provided with a plurality of pneumatic tires each comprise a plurality of rims on each of which is mounted a pneumatic tire, all the rims of a same wheel being rigidly assembled together.
5. Véhicule selon la revendication 1 ou la revendication 2, caractérisé par le fait que le nombre des bandages pneuma¬ tiques montés sur les roues munies d'une pluralité de pneumatiques est un nombre pair.5. Vehicle according to claim 1 or claim 2, characterized in that the number of pneumatic tires mounted on the wheels provided with a plurality of tires is an even number.
6. Véhicule selon la revendication 1 ou la revendication 2, caractérisé par le fait que le nombre des bandages pneumatiques montés sur les roues munies d'une pluralité de pneumatiques est un nombre impair.6. Vehicle according to claim 1 or claim 2, characterized in that the number of tires tires mounted on wheels fitted with a plurality of tires is an odd number.
7. Véhicule selon la revendication 2, caractérisé par le fait que chacune de ses roues avant est munie d'au moins trois bandages pneumatiques et chacune de ses roues arrière est munie d'au moins quatre bandages pneumatiques.7. Vehicle according to claim 2, characterized in that each of its front wheels is provided with at least three pneumatic tires and each of its rear wheels is provided with at least four pneumatic tires.
8. Véhicule selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il est capable d'atteindre, en palier, une vitesse au moins égale à 120 km/h.8. Vehicle according to any one of the preceding claims, characterized in that it is capable of reaching, in level, a speed at least equal to 120 km / h.
9. Véhicule selon la revendication 1 ou la revendication 2, caractérisé par le fait que les bandages pneumatiques de chacune des roues munies d'une pluralité de pneumatiques présentent une partie extérieure, destinée à venir en contact avec la route, ayant une section de forme générale approximativement triangulaire.9. Vehicle according to claim 1 or claim 2, characterized in that the pneumatic tires of each of the wheels provided with a plurality of tires have an outer part, intended to come into contact with the road, having a cross section general approximately triangular.
OMPI WIPO
PCT/CH1983/000012 1982-02-17 1983-02-07 Road motor vehicle WO1983002921A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11569/83A AU1156983A (en) 1982-02-17 1983-02-07 Vehicule routier automobile

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH972/82-3 1982-02-17
CH97282A CH645854A5 (en) 1982-02-17 1982-02-17 Vehicle wheel rim with pneumatic tyres and motor vehicle fitted with wheels comprising such a rim
CH430482 1982-07-15
CH4304/82-4820715 1982-07-15

Publications (1)

Publication Number Publication Date
WO1983002921A1 true WO1983002921A1 (en) 1983-09-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1983/000012 WO1983002921A1 (en) 1982-02-17 1983-02-07 Road motor vehicle

Country Status (3)

Country Link
FR (1) FR2521494A1 (en)
IT (1) IT1212978B (en)
WO (1) WO1983002921A1 (en)

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FR2547246A1 (en) * 1983-06-13 1984-12-14 Jjd Sa Vehicle wheel, comprising at least two tyres mounted on the same rim
US4782876A (en) * 1983-06-13 1988-11-08 Jjd S.A. Vehicle wheel
US4925250A (en) * 1988-10-31 1990-05-15 Michael Sorrentino Dual wheels for a radio controlled toy car
DE10037562A1 (en) * 2000-08-02 2002-02-21 Elisabeth Puchalla Safety wheel system, comprises wheel which can be fitted with one broad or several narrow tires, inflation valve being mounted at hub and connecting tube running from it through one of spokes to outlet in wheel rim

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CH656840A5 (en) * 1983-11-24 1986-07-31 Jjd Sa MOTOR VEHICLE WHEEL.
NL9300729A (en) * 1993-04-28 1994-11-16 Terberg Benschop B V Vehicle for freight transport, and hub element
DE29705883U1 (en) * 1997-04-03 1997-06-26 Kähler, Kai, 20355 Hamburg Vehicle wheel
GB2424858A (en) * 2005-04-07 2006-10-11 Far Great Plastics Ind Co Ltd Wheel assembly with at least two spaced ground contacting portions
WO2011042753A1 (en) * 2009-10-10 2011-04-14 Limani Oudani Wheel and a tire for use with the same

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US1662208A (en) * 1927-11-01 1928-03-13 Pounds Hoyle Tractor wheel
FR764238A (en) * 1933-11-09 1934-05-17 Michelin & Cie Wheel improvements for vehicles
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547246A1 (en) * 1983-06-13 1984-12-14 Jjd Sa Vehicle wheel, comprising at least two tyres mounted on the same rim
US4782876A (en) * 1983-06-13 1988-11-08 Jjd S.A. Vehicle wheel
US4925250A (en) * 1988-10-31 1990-05-15 Michael Sorrentino Dual wheels for a radio controlled toy car
DE10037562A1 (en) * 2000-08-02 2002-02-21 Elisabeth Puchalla Safety wheel system, comprises wheel which can be fitted with one broad or several narrow tires, inflation valve being mounted at hub and connecting tube running from it through one of spokes to outlet in wheel rim

Also Published As

Publication number Publication date
FR2521494B3 (en) 1985-01-04
FR2521494A1 (en) 1983-08-19
IT1212978B (en) 1989-12-07
IT8367165A0 (en) 1983-02-15

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