FR2659927A1 - DEVICE FOR AUTOMATICALLY ADJUSTING THE BODY OF THE WHEELS OF A VEHICLE. - Google Patents

DEVICE FOR AUTOMATICALLY ADJUSTING THE BODY OF THE WHEELS OF A VEHICLE. Download PDF

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Publication number
FR2659927A1
FR2659927A1 FR9003991A FR9003991A FR2659927A1 FR 2659927 A1 FR2659927 A1 FR 2659927A1 FR 9003991 A FR9003991 A FR 9003991A FR 9003991 A FR9003991 A FR 9003991A FR 2659927 A1 FR2659927 A1 FR 2659927A1
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France
Prior art keywords
wheel
vehicle
rotation
rod
action
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Granted
Application number
FR9003991A
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French (fr)
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FR2659927B1 (en
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Raes Michel
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Individual
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Individual
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Priority to FR9003991A priority Critical patent/FR2659927B1/en
Priority to PCT/FR1991/000234 priority patent/WO1991014609A1/en
Publication of FR2659927A1 publication Critical patent/FR2659927A1/en
Application granted granted Critical
Publication of FR2659927B1 publication Critical patent/FR2659927B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D17/00Means on vehicles for adjusting camber, castor, or toe-in

Abstract

System for the automatic correction of the camber of a wheel of a vehicle in relation to the bends in the road in which, according to the invention, the wheel is subjected at a point below it axis (7; 7) to the action of a push-rod constituted by a rod (5) fixed in rotation and movable axially, by co-operation between a male thread at its end opposite the point of action beneath the wheel and a female thread of an axially fixed stud (1) rotatably driven (at 8) by an electric motor (not shown) fitted on a suspension component of the vehicle coaxially with said rod, the duration and direction of rotation of which is controlled by a microprocessor continuously receiving information from the steering system on the bends negotiated by the vehicle.

Description

La présente invention concerne les dispositifs visant à modifier automatiquement le carrossage des roues d'une automobile en fonction des courbes d'une route. The present invention relates to devices for automatically changing the camber of the wheels of an automobile according to the curves of a road.

II est connu que, dans le but d'améliorer l'adhérence des roues d'une automobile à la route dans les virages, il serait souhaitable de permettre à la bande de roulement des pneumatiques de rester en contact à 100 % avec le sol. Or, en règle général, ce n'est pas le cas, ce que montre l'usure progressive de cette bande de roulement. It is known that, in order to improve the adhesion of the wheels of an automobile to the road when cornering, it would be desirable to allow the tread of the tires to remain in 100% contact with the ground. However, as a general rule, this is not the case, as shown by the progressive wear of this tread.

On a toutefois déjà proposé de remédier à cette insuffisance en modifiant automatiquement le carrossage des roues en fonction des virages. However, it has already been proposed to remedy this insufficiency by automatically modifying the camber of the wheels according to the turns.

Ainsi, le brevet français 2 474 957 vise un dispositif de suspension permettant de "faire varier le carrossage de façon automatique". Ce dispositif consiste à monter la fusée de chaque roue dans un ensemble de tringlerie complexe comportant un moyen détecteur" de la position d'une barre coulissante en fonction du virage. Thus, French patent 2,474,957 is aimed at a suspension device making it possible to "vary the camber automatically". This device consists in mounting the spindle of each wheel in a complex linkage assembly comprising a means "of detecting the position of a sliding bar as a function of the turn.

De même, le brevet français 2 597 032 (Peugeot-Citroen) décrit un dispositif de suspension "à carrossage variable selon les conditions de roulage" et consistant également en une tringlerie complexe. Similarly, French patent 2,597,032 (Peugeot-Citroen) describes a suspension device "with variable camber depending on the driving conditions" and also consisting of a complex linkage.

De même, le brevet français 2 496 563 (BMW) décrit un dispositif de suspension prévoyant toute "variation de carrossage de la roue" et consistant également en une tringlerie complexe. Likewise, French patent 2,496,563 (BMW) describes a suspension device providing for any "variation in the camber of the wheel" and also consisting of a complex linkage.

Enfin, il en est de même pour le brevet français 2 602 466 (Renault). Finally, the same is true for French patent 2,602,466 (Renault).

II ressort donc de ce résumé sommaire de l'état de la technique que ce problème a déjà été soulevé, mais que toutes les solutions proposées pour le résoudre telles qu'elles sont exposées ci-dessus, font intervenir des embiellages et des tringleries complexes, donc exigeant des réglages délicats et fréquents et susceptibles de nombreuses avaries. It therefore emerges from this summary summary of the state of the art that this problem has already been raised, but that all the solutions proposed for solving it as set out above, involve complex linkages and linkages, therefore requiring delicate and frequent adjustments and liable to numerous damages.

L'invention apporte au même problème une solution nouvelle, complètement différente, simple aussi bien dans son principe que dans sa mise en pratique. The invention brings to the same problem a new solution, completely different, simple both in principle and in practice.

Selon l'invention, la roue est soumise en un poir:- situé au-dessous de sor, axe, à l'action d'un poussoir constitué par par une tige fixe en rotation et mobile axialement, par coopération entre un filetage extérieur situé à son extrémité opposé au point d'action sous la roue, et un filetage intérieur d'un goujon fixe axialement mais entraîné en rotation par un moteur électrique, monté sur un élément de la suspension du véhicule et dont la rotation est elle-même commandée en durée et en direction par un microprocesseur recevant à chaque instant du système de direction, les informations sur les courbes négociées par le véhicules. According to the invention, the wheel is subjected to a pear: - located below its axis, to the action of a pusher constituted by a fixed rod in rotation and axially movable, by cooperation between an external thread located at its end opposite the point of action under the wheel, and an internal thread of a stud fixed axially but driven in rotation by an electric motor, mounted on an element of the vehicle suspension and whose rotation is itself controlled in duration and direction by a microprocessor receiving at all times from the steering system, information on the curves negotiated by the vehicle.

Suivant ce système, lors du passage dans une courbe orientée par exemple vers la droite, la manoeuvre correspondante du système de direction sera détectée par le micro processeur qui gérera le moteur en lui envoyant une information qui déterminera sa rotation en durée et en direction, de manière telle que cette rotation, agissant sur le filetage de la tige filetée correspondant à la roue avant gauche, provoquera une poussée axiale de cette tige sur ladite roue avant gauche, lui imprimant un angle de carrossage négatif plus important qu'en ligne droite, ce qui permettra à la bande de roulement de rester en contact avec la route à 100 %. Après le passage de cette courbe, le moteur tournera d'autant, en sens inverse, de sorte que la tige filetée ramènera la roue à son angle de carrossage initial. According to this system, when passing through a curve oriented for example to the right, the corresponding maneuver of the steering system will be detected by the microprocessor which will manage the engine by sending it information which will determine its rotation in duration and direction, from such that this rotation, acting on the thread of the threaded rod corresponding to the left front wheel, will cause an axial thrust of this rod on said left front wheel, giving it a greater negative camber angle than in a straight line, which will allow the tread to stay in contact with the road at 100%. After the passage of this curve, the motor will rotate accordingly, in the opposite direction, so that the threaded rod will bring the wheel back to its initial camber angle.

Si le véhicule négocie une courbe à gauche, c'est le couple moteur/tige filetée agissant sur la roue avant droite, qui interviendra, de façon semblable. If the vehicle negotiates a curve to the left, it is the engine / threaded rod couple acting on the right front wheel, which will intervene, in a similar way.

On va maintenant décrire l'invention en se référant au dessin annexé, sur lequel:
- La figure 1 représente vu de dessus le système selon l'invention, monté sur un triangle, sans le moteur d'entraînement.
We will now describe the invention with reference to the accompanying drawing, in which:
- Figure 1 shows a top view of the system according to the invention, mounted on a triangle, without the drive motor.

- Les figures 2a et 2b représentent en perspective les deux éléments de la figure 1 et,
- La figure 3 montre le point d'accrochage du poussoir du système sur un porte-roue.
- Figures 2a and 2b show in perspective the two elements of Figure 1 and,
- Figure 3 shows the point of attachment of the system pusher on a wheel carrier.

Sur ce dessin, on a désigné par 1 un goujon monté rotatif par deux roulements R1 et R2 sur le triangle 2 de la suspension d'un porte-roue 3 et fixe axialement. In this drawing, there is designated by 1 a stud rotatably mounted by two bearings R1 and R2 on the triangle 2 of the suspension of a wheel carrier 3 and axially fixed.

L'axe extérieur 4 de ce goujon est fileté intérieurement et ce filetage coopère avec une tige poussoir 5 qui lui est coaxiale et dont une extrémité est filetée en 6, tandis que l'autre vient s'accrocher par un cardan 7 à un point 7' du porte-roue 3 situé au dessous de l'axe.The outer axis 4 of this stud is internally threaded and this thread cooperates with a push rod 5 which is coaxial with it and one end of which is threaded at 6, while the other is hooked by a cardan joint 7 to a point 7 'of the wheel carrier 3 located below the axis.

Un moteur électrique (non représenté) de préférence du type pas à pas en raison de se rapidité d'action et de sa précision, est fixé au triangle 2 au dessus du goujon 1, de manière à entraîner ce demier en rotation par un engrenage extérieur 8. An electric motor (not shown) preferably of the stepping type because of its speed of action and its precision, is fixed to the triangle 2 above the stud 1, so as to drive the latter in rotation by an external gear. 8.

Ce moteur est géré en vitesse, durée et direction de rotation, par un microprocesseur (non représenté) commun à toutes les roues équipées de ce dispositif et recevant ces informations du système de direction du véhicule. This engine is managed in speed, duration and direction of rotation, by a microprocessor (not shown) common to all the wheels equipped with this device and receiving this information from the vehicle's steering system.

Le fonctionnement du dispositif est alors le suivant, en supposant que le dessin correspond à la roue avant gauche. The operation of the device is then as follows, assuming that the drawing corresponds to the left front wheel.

Quand la route présentera une courbe vers la droite, le conducteur tournera le volant vers la droite d'un certain angle et pendant un certain temps. Ces informations seront détectées par le micro-processeur qui gèrera le moteur électrique de telle manière que sa rotation entraînera, par l'intermédiaire de l'engrenage 8, celle du goujon 1 d'un angle correspondant. Cette rotation, par coopération entre le filetage intérieur de l'axe 4 et le filetage extérieur 6 du poussoir 5, déterminera un déplacement axial dudit poussoir, qui, par pression du cardan 7 sur le point 7' du porte-roue 3, donnera à la roue un angle de carrossage négatif, correspondant également à la courbe de la route, ce qui permettra à la bande de roulement de demeurer en contact à 100 % avec la route pendant tout le virage. Le virage passé, le retour du volant déterminera le processus inverse et le retour de la roue à son carrossage initial. When the road curves to the right, the driver will turn the steering wheel to the right by a certain angle and for a certain time. This information will be detected by the microprocessor which will manage the electric motor in such a way that its rotation will cause, via the gear 8, that of the stud 1 by a corresponding angle. This rotation, by cooperation between the internal thread of the axis 4 and the external thread 6 of the plunger 5, will determine an axial displacement of said plunger, which, by pressure of the gimbal 7 on the point 7 'of the wheel carrier 3, will give the wheel has a negative camber angle, also corresponding to the curve of the road, which will allow the tread to remain in 100% contact with the road throughout the turn. After the turn, the return of the steering wheel will determine the reverse process and the return of the wheel to its initial camber.

Le dispositif selon l'invention ne comporte donc qu'un nombre minimum d'éléments mobiles, ce qui élimine les inconvénients des systèmes connus. The device according to the invention therefore comprises only a minimum number of mobile elements, which eliminates the drawbacks of known systems.

Bien entendu, ce dispositif s'applique aussi bien au train arrières qu'au train avant et dans le cas de suspension non triangulées, I'ensemble 1-5 peut être fixé sur tout autre élément fixe de la suspension.  Of course, this device applies to the rear axle as well as to the front axle and in the case of non-triangulated suspension, the assembly 1-5 can be fixed to any other fixed element of the suspension.

Claims (2)

REVENDICATIONS 1. Système pour la correction automatique du carrossage d'une roue sur un véhicule en fonction des courbes de la route, caractérisé en ce que selon l'invention, la roue est soumise en un point situé au-dessous de son axe, à l'action d'un poussoir constitué par par une tige fixe en rotation et mobile axialement, par coopération entre un filetage extérieur situé à son extrémité opposé au point d'action sous la roue, et un filetage intérieur d'un goujon fixe axialement mais entraîné en rotation par un moteur électrique, monté sur un élément de la suspension du véhicule coaxialement à ladite tige et dont la rotation est elle-même commandée en durée et en direction par un microprocesseur recevant à chaque instant du système de direction, les informations sur les courbes négociées par le véhicules. 1. System for the automatic correction of the camber of a wheel on a vehicle as a function of the curves of the road, characterized in that according to the invention, the wheel is subjected at a point situated below its axis, to the action of a pusher constituted by a fixed rod in rotation and axially movable, by cooperation between an external thread located at its end opposite the point of action under the wheel, and an internal thread of a stud fixed axially but driven in rotation by an electric motor, mounted on an element of the vehicle suspension coaxial with said rod and the rotation of which is itself controlled in duration and in direction by a microprocessor receiving at all times from the steering system, the information on the curves negotiated by the vehicles. 2. Système selon la revendication 1, caractérisé en ce que, la suspension du véhicule étant triangulée, I'ensemble du moteur électrique et des éléments du commande du système sont montés sur le triangle de chaque roue.  2. System according to claim 1, characterized in that, the suspension of the vehicle being triangulated, the assembly of the electric motor and elements of the control of the system are mounted on the triangle of each wheel.
FR9003991A 1990-03-23 1990-03-23 DEVICE FOR AUTOMATICALLY ADJUSTING THE BODY OF THE WHEELS OF A VEHICLE. Expired - Fee Related FR2659927B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9003991A FR2659927B1 (en) 1990-03-23 1990-03-23 DEVICE FOR AUTOMATICALLY ADJUSTING THE BODY OF THE WHEELS OF A VEHICLE.
PCT/FR1991/000234 WO1991014609A1 (en) 1990-03-23 1991-03-22 Device automatically adjusting vehicle wheel camber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9003991A FR2659927B1 (en) 1990-03-23 1990-03-23 DEVICE FOR AUTOMATICALLY ADJUSTING THE BODY OF THE WHEELS OF A VEHICLE.

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FR2659927A1 true FR2659927A1 (en) 1991-09-27
FR2659927B1 FR2659927B1 (en) 1995-06-30

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FR9003991A Expired - Fee Related FR2659927B1 (en) 1990-03-23 1990-03-23 DEVICE FOR AUTOMATICALLY ADJUSTING THE BODY OF THE WHEELS OF A VEHICLE.

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WO (1) WO1991014609A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760421A1 (en) * 1997-03-10 1998-09-11 Michel Raes Method of adjusting vehicle wheel angle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3139792A1 (en) * 1981-10-07 1983-04-21 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Wheel suspension for a rear axle of motor vehicles
DE3629881A1 (en) * 1985-09-03 1987-03-05 Toyota Motor Co Ltd DEVICE FOR ADJUSTING A TRACKING ANGLE OF A WHEEL
DE3709928A1 (en) * 1987-03-26 1988-10-06 Porsche Ag Individual wheel suspension
GB2203711A (en) * 1987-04-21 1988-10-26 Honda Motor Co Ltd Method of and apparatus for controlling camber of rear wheels of four-wheel-steering vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3139792A1 (en) * 1981-10-07 1983-04-21 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Wheel suspension for a rear axle of motor vehicles
DE3629881A1 (en) * 1985-09-03 1987-03-05 Toyota Motor Co Ltd DEVICE FOR ADJUSTING A TRACKING ANGLE OF A WHEEL
DE3709928A1 (en) * 1987-03-26 1988-10-06 Porsche Ag Individual wheel suspension
GB2203711A (en) * 1987-04-21 1988-10-26 Honda Motor Co Ltd Method of and apparatus for controlling camber of rear wheels of four-wheel-steering vehicles

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Publication number Publication date
FR2659927B1 (en) 1995-06-30
WO1991014609A1 (en) 1991-10-03

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