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
plurality
characterized
pneumatic tires
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 to CH97282A priority Critical patent/CH645854A5/en
Priority to CH972/82-3 priority
Priority to CH430482 priority
Priority to CH4304/82-4820715 priority
Application filed by Perrin Importateur filed Critical Perrin Importateur
Priority claimed from AU11569/83A external-priority patent/AU1156983A/en
Publication of WO1983002921A1 publication Critical patent/WO1983002921A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B11/00Units comprising multiple wheels arranged side by side; Wheels having more than one rim or capable of carrying more than one tyre
    • B60B11/04Wheels with a rim capable of carrying more than one tyre

Abstract

Rapid 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 allows the mounting of a tire (3a, 3b, 3c). The total height / width ratio of the assembly formed using three tires (3a, 3b, 3c) of the normal type corresponds to the height / width ratio of a single tire with a wide section. The invention improves the handling of the vehicle at high speed, especially on slippery roads. In addition, the risk of accident in the event of a puncture or bursting of the tire is reduced and there is no need to change the wheel on site.

Description

 AUTOMOTIVE ROAD VEHICLE

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. 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.

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 . * 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.

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.

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

OVPI even on a road covered with snow or ice.

The invention also aims to reduce the cost price of the tire equipment of a fast automobile.

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.

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.

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.

According to a particular embodiment of the vehicle, all the wheels are each provided with a plurality of pneumatic tires.

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:

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; and

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. 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.

The wheel 9, shown in Figure 2, is, for example, arranged as shown in Figure 4 and described below.

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.

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 . 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

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 '.

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.

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.

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.

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.

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.

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.

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.

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.

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

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. Vehicle according to claim 1, characterized in that all of its wheels are provided with a plurality of pneumatic tires.
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. 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. 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. 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. 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. 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. 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.
WIPO
PCT/CH1983/000012 1982-02-17 1983-02-07 Road motor vehicle WO1983002921A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
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
CH972/82-3 1982-02-17
CH430482 1982-07-15
CH4304/82-4820715 1982-07-15

Applications Claiming Priority (1)

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

Publications (1)

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

Family

ID=25686262

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) FR2521494B3 (en)
IT (1) IT1212978B (en)
WO (1) WO1983002921A1 (en)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 Kaehler Kai 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

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR395286A (en) * 1900-01-01
FR433525A (en) * 1911-08-23 1912-01-09 Josselme Pierre Wheel combined tires for cars, bicycles and other vehicles
US1662208A (en) * 1927-11-01 1928-03-13 Pounds Hoyle Tractor wheel
FR764238A (en) * 1933-11-09 1934-05-17 Michelin & Cie Improvements to vehicle wheels
FR773188A (en) * 1934-05-12 1934-11-13 A hub for dual wheels heavyweight
US2341755A (en) * 1940-10-29 1944-02-15 Charles S Ash Dual wheel assembly
US2410557A (en) * 1943-08-23 1946-11-05 Frank A Watson Automotive vehicle
US2926047A (en) * 1958-11-25 1960-02-23 Theodoric B Edwards Vehicle wheel assembly
US3664709A (en) * 1970-05-06 1972-05-23 J Barr E Lester Dual wheel adaptor system
DE2206991A1 (en) * 1971-02-16 1972-08-31
US3704040A (en) * 1970-08-28 1972-11-28 Peerless Mfg Co Vehicle for traversing rough terrain
US3913981A (en) * 1974-06-06 1975-10-21 Solis Dennis A Dual tire wheel and method of making same
US4124051A (en) * 1976-05-21 1978-11-07 Horton William E Shock absorbing wheel hub
WO1980000235A1 (en) * 1978-07-10 1980-02-21 Ifm Akustikbyran Ab Wheel with several tyres having a reduced noise level

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR395286A (en) * 1900-01-01
FR433525A (en) * 1911-08-23 1912-01-09 Josselme Pierre Wheel combined tires for cars, bicycles and other vehicles
US1662208A (en) * 1927-11-01 1928-03-13 Pounds Hoyle Tractor wheel
FR764238A (en) * 1933-11-09 1934-05-17 Michelin & Cie Improvements to vehicle wheels
FR773188A (en) * 1934-05-12 1934-11-13 A hub for dual wheels heavyweight
US2341755A (en) * 1940-10-29 1944-02-15 Charles S Ash Dual wheel assembly
US2410557A (en) * 1943-08-23 1946-11-05 Frank A Watson Automotive vehicle
US2926047A (en) * 1958-11-25 1960-02-23 Theodoric B Edwards Vehicle wheel assembly
US3664709A (en) * 1970-05-06 1972-05-23 J Barr E Lester Dual wheel adaptor system
US3704040A (en) * 1970-08-28 1972-11-28 Peerless Mfg Co Vehicle for traversing rough terrain
DE2206991A1 (en) * 1971-02-16 1972-08-31
US3913981A (en) * 1974-06-06 1975-10-21 Solis Dennis A Dual tire wheel and method of making same
US4124051A (en) * 1976-05-21 1978-11-07 Horton William E Shock absorbing wheel hub
WO1980000235A1 (en) * 1978-07-10 1980-02-21 Ifm Akustikbyran Ab Wheel with several tyres having a reduced noise level

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
IT1212978B (en) 1989-12-07
FR2521494A1 (en) 1983-08-19
FR2521494B3 (en) 1985-01-04
IT8367165D0 (en) 1983-02-15

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