FR2561591A1 - Height corrector control device for motor vehicle rear axle - Google Patents

Height corrector control device for motor vehicle rear axle Download PDF

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Publication number
FR2561591A1
FR2561591A1 FR8404615A FR8404615A FR2561591A1 FR 2561591 A1 FR2561591 A1 FR 2561591A1 FR 8404615 A FR8404615 A FR 8404615A FR 8404615 A FR8404615 A FR 8404615A FR 2561591 A1 FR2561591 A1 FR 2561591A1
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FR
France
Prior art keywords
control device
bar
corrector
finger
signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR8404615A
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French (fr)
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FR2561591B1 (en
Inventor
Denis Edouard Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
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Automobiles Peugeot SA
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 Automobiles Peugeot SA filed Critical Automobiles Peugeot SA
Priority to FR8404615A priority Critical patent/FR2561591B1/en
Publication of FR2561591A1 publication Critical patent/FR2561591A1/en
Application granted granted Critical
Publication of FR2561591B1 publication Critical patent/FR2561591B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B60G17/01933—Velocity, e.g. relative velocity-displacement sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/18—Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only
    • B60G11/183—Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only arranged in a plane transverse to the longitudinal axis of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B60G21/0551—Mounting means therefor
    • B60G21/0553—Mounting means therefor adjustable

Abstract

The subject of the present invention is a height corrector control device for motor vehicle rear axle equipped with an anti-roll torsion bar connecting the two wheel support arms, comprising means for detecting the pivoting of the mid-point of the bar, elastic means for absorbing the vibrational components of the detected angular signal, means for transmitting the continuous component of the signal, and means for transforming this continuous component into a linear signal acting on the height detector. According to the invention the torsion bar 2 comprises, at its middle, a knurled portion of increased thickness 3 upon which the information is picked up.

Description

Dispositif de commande de correcteur de hauteur pour
essieu arrière de v4aicule automobile.Height corrector control device for
rear axle of automotive vehicle.

La présente invention concerne un dispositif de commande de correcteur de hauteur pour.essieu arrière de véhicule automobile à suspension hydraulique. The present invention relates to a height corrector control device for a rear axle of a motor vehicle with hydraulic suspension.

Les véhicules équipés d'une suspension hydraulique sont gé néralement munis d'un correcteur de hauteur par essieu, capable d'agir sur les vérins de suspension pour corriger la hauteur de la partie suspendue, qui normalement varierait en fonction de la charge du véhicule, de manière à la maintenir approximativement constante quelle que soit la charge. Vehicles fitted with a hydraulic suspension are generally equipped with a height corrector per axle, capable of acting on the suspension cylinders to correct the height of the suspended part, which would normally vary depending on the load of the vehicle, so as to keep it approximately constant whatever the load.

Un correcteur de hauteur comprend en général .un tiroir hydraulique dont la position est liée aux indications d'un détecteur de position , sensible à la hauteur de la partie suspendue la position du tiroir déterminant l'admission d'un liquide sous pression dans les vérins de suspension afin d'effectuer la correction de hauteur.Le correcteur de hauteur est le plus souvent muni de moyens propres à assurer un amortissement temporisé de la variation de hauteur et à coopérer avec des moyens élastiques afin d'éliminer les signaux vibratoires qui correspondent aux sollici- tations permanentes de la route, le correcteur de hauteur n'intervenant ainsi pour corriger la position de la partie suspendue que pour les sollicitations de longue durée (généralement supérieures à 5 secondes) qui correspondent à une modification de charge dans l'habitacle affectant l'ensemble de l'essieu. A height corrector generally comprises a hydraulic drawer, the position of which is linked to the indications of a position detector, sensitive to the height of the suspended part, the position of the drawer determining the admission of a liquid under pressure into the jacks. suspension system in order to carry out the height correction. The height corrector is most often provided with means suitable for ensuring a delayed damping of the height variation and for cooperating with elastic means in order to eliminate the vibrational signals which correspond to the permanent stresses on the road, the height corrector thus intervening to correct the position of the suspended part only for long-term stresses (generally greater than 5 seconds) which correspond to a change in load in the passenger compartment affecting the whole axle.

Les véhicules s u s p e n d u s de la manière définie ci-dessus comportent sur l'essieu arrière une barre anti-roulis reliant les deux bras portant les roues. Vehicles s u s p e n d u s as defined above have an anti-roll bar on the rear axle connecting the two arms carrying the wheels.

La torsion de cette barre s'oppose au roulis des deux roues de l'essieu, mais cette torsion est toujours pratiquement ndgli- gable au point milieu. Ce point milieu est néanmoins soumis comme l'ensemble de la barre à un mouvement de pivotement quand l'es sieu change de hauteur. The torsion of this bar is opposed to the roll of the two wheels of the axle, but this torsion is always practically negligible at the midpoint. This midpoint is nevertheless subject like the whole bar to a pivoting movement when the axle changes height.

On connalt ainsi des dispositifs de commande de correcteur de hauteur pour essieu arrière de vehicule automobile munis d'u- ne barre de torsion anti-roulis reliant les deux bras de support de roue, qui comportent des moyens pour détecter le pivotement du point milieu de la barre des moyens élastiques d'absorption des composantes vibratoires du signal angulaire détecté, des moyens de transmission de la composante continue du signal, et des moyens pour transformer cette composante continue en un signal linéaire agissant sur le détecteur de hauteur. There are thus known height corrector control devices for the rear axle of a motor vehicle provided with an anti-roll torsion bar connecting the two wheel support arms, which include means for detecting the pivoting of the mid-point of the bar of the elastic means for absorbing the vibratory components of the detected angular signal, means for transmitting the continuous component of the signal, and means for transforming this continuous component into a linear signal acting on the height detector.

La prise d'information en point milieu de la barre pose un problème. Il est en effet nécessaire que la position angulaire du détecteur par rapport à la barre soit fixe et ne puisse pas se modifier, par exemple sous l'effet des vibrations. Il est d'autre part nécessaire que la prise d'information n'affaiblisse pas la barre de torsion. Le détecteur ne peut par suite pas entre fixé sur la barre par exemple par une vis traversant cette barre. Getting information in the middle of the bar is a problem. It is indeed necessary that the angular position of the detector relative to the bar is fixed and cannot be modified, for example under the effect of vibrations. It is also necessary that the taking of information does not weaken the torsion bar. The detector cannot consequently be fixed on the bar, for example by a screw passing through this bar.

La présente invention a pour objet un dispositif de commande de correcteur de hauteur du type ci-dessus qui est perfec tionné de manière à satisfaire à ces conditions. The present invention relates to a height corrector control device of the above type which is perfected so as to meet these conditions.

Le dispositif selon l'invention est caractérisé en ce que la barre de torsion comporte en son milieu, une surépaisseur mo letée sur laquelle est effectuée la prise d'information. The device according to the invention is characterized in that the torsion bar comprises in the middle, a knitted allowance on which the information is taken.

On a décrit ci-apres, à titre d'exemple non limitatif, un mode de réalisation du dispositif de commande selon l'invention, avec référence au dessin annexé dans lequel
La Figure 1 est une vue de face du dispositif de commande;
La Figure 2 en est une vue en coupe suivant II-II de la
Figure 1.An embodiment of the control device according to the invention has been described below, by way of non-limiting example, with reference to the appended drawing in which
Figure 1 is a front view of the control device;
Figure 2 is a sectional view along II-II of the
Figure 1.

Au dessin, on voit une traverse d'essieu arrière 1 constituée par un tube à l'intérieur duquel est disposée une barre antiroulis 2. In the drawing, there is seen a rear axle cross member 1 constituted by a tube inside which an anti-roll bar 2 is arranged.

La barre 2 présente en son milieu une surépaisseur moletée 3 sur laquelle est montée une bague 4. Celle-ci comporte un trou taraudé dans lequel est vissé une vis 5 s'engageant par son extrémité dans le moletage de la surépaisseur 3. La traverse 1 est percée d'un trou 6 qui permet le serrage du boulon 5 et est fermé par un bouchon 7. The bar 2 has in the middle a knurled allowance 3 on which is mounted a ring 4. This includes a threaded hole in which is screwed a screw 5 engaging at its end in the knurling of the allowance 3. The crosspiece 1 is pierced with a hole 6 which allows the tightening of the bolt 5 and is closed by a plug 7.

La bague 4 est prolongée d'un côté par une portion cylindrique 4a sur laquelle peut à la fois pivoter et coulisser une deuxième bague 8 immobilisée axialement par un anneau 9 lui-m8me maintenu par un épanoui 4n du prolongement cylindrique 4a de la bague 4. The ring 4 is extended on one side by a cylindrical portion 4a on which can both pivot and slide a second ring 8 immobilized axially by a ring 9 itself held by a breakout 4n of the cylindrical extension 4a of the ring 4.

La bague 4 présente un doigt 4c parallèle à son axe et dirigé du côté du prolongement 4a. De son côté, la bague 8 est solidaire d'un doigt 8a auquel elle est reliée par un flasque 8b et qui est tourné vers la bague 4 et parallèle au doigt 4c. The ring 4 has a finger 4c parallel to its axis and directed towards the side of the extension 4a. For its part, the ring 8 is integral with a finger 8a to which it is connected by a flange 8b and which is turned towards the ring 4 and parallel to the finger 4c.

Un ressort spiral 10 est enroulé sur la bague 8, et interposé entre la bague 4 et le flasque 8b de la bague 8. Ses deux
extrémités 10a et 1Ob se croisent et sont en appui respectivement contre les doigts 4c et 8a, avec un effort de prdcontrainte de l'ordre de 6 à 8 Kgs.A spiral spring 10 is wound on the ring 8, and interposed between the ring 4 and the flange 8b of the ring 8. Its two
ends 10a and 10b intersect and bear respectively against the fingers 4c and 8a, with a prestressing effort of the order of 6 to 8 kg.

Comme on le voit plus particulièrement à la figure 2, la bague 8 est solidaire d'un tube taraudé 11 dans lequel est engagée l'une des extrémités, qui est filetée, d'un pion 12 dont l'autre extrémité 12a est sphérique et constitue la partie interne d'une première rotule 13. Une deuxième rotule 14 dont la partie externe i5a est solidaire de la partie externe 15b de la rotule 13, est prévue de manière que, en position de repos, la ligne des centres des deux rotules 13 et 14 coïncide approximativement avec l'axe du tiroir 15 d'un correcteur de hauteur 16. Le tiroir 15 peut se déplacer dans le sens de la flèche f et est solidaire d'un support 17 sur lequel est fixé un pion 18, l'extrd- mité 18a de celui-ci dtant sphérique et constituant la partie interne de la rotule 14. As can be seen more particularly in FIG. 2, the ring 8 is integral with a threaded tube 11 in which is engaged one of the ends, which is threaded, of a pin 12 whose other end 12a is spherical and constitutes the internal part of a first ball joint 13. A second ball joint 14 whose external part i5a is integral with the external part 15b of the ball joint 13, is provided so that, in the rest position, the line of the centers of the two ball joints 13 and 14 approximately coincides with the axis of the drawer 15 of a height corrector 16. The drawer 15 can move in the direction of the arrow f and is secured to a support 17 on which is fixed a pin 18, l end 18a thereof being spherical and constituting the internal part of the ball 14.

Le pion 12 sort de la traverse 1 par un trou 19 qui est protégé par un pare-poussière 20. The pin 12 comes out of the cross member 1 through a hole 19 which is protected by a dust cover 20.

Quand la barre anti-roulis est sollicitée en vibration et quelle entrain la bague 4 , cette bague entraîne à son tour l'ex trématé îOa ou 1Ob du ressort 10; mais l'autre extrémité 1Ob ou 10a du ressort ne suit que partiellement le mouvement et avec un certain retard. Ainsi, le ressort, en coopération avec l'amortis seur du correcteur 16 absorbe les composantes vibratoires du de- placement angulaire du point milieu de la barre de torsion; le tiroir 15 ne reçoit ainsi que la composante continue du signal et assure la correction de hauteur en fonction de l'angle de pivotement moyen du point milieu de la barre de torsion, c'est-àdire en fonction uniquement de la charge. When the anti-roll bar is requested to vibrate and what causes the ring 4, this ring in turn causes the ex-jibe îOa or 1Ob of the spring 10; but the other end 10b or 10a of the spring only partially follows the movement and with a certain delay. Thus, the spring, in cooperation with the damper of the corrector 16 absorbs the vibratory components of the angular displacement of the midpoint of the torsion bar; drawer 15 thus receives only the continuous component of the signal and provides height correction as a function of the mean pivot angle of the midpoint of the torsion bar, that is to say as a function only of the load.

il va de soi que la présente invention ne doit pas entre considérée comme limitée au mode de réalisation décrit et reperd senté, mais en couvre, au contraire, toutes les variantes.  It goes without saying that the present invention should not be regarded as limited to the embodiment described and felt again, but, on the contrary, covers all the variants thereof.

Claims (6)

REVENDICATIONS 1. - Dispositif de commande de correcteur de hauteur pour essieu arrière de véhicule automobile muni d'une barre de torsion anti-roulis reliant les deux bras du support de roue, comportant des moyens pour détecter le pivotement du point milieu de la barre, des moyens élastiques d'absorption des composantes vibratoires du signal angulaire détecté, des moyens de transmission de la composante continue du signal, et des moyens pour transformer cette composante continue en un signal linéaire agissant sur le détecteur de hauteur, caractérisé en ce que la barre de torsion 2 comporte en son milieu une surépaisseur moletée 3 sur laquelle est effectuée la prise d'information. 1. - Height corrector control device for rear axle of a motor vehicle provided with an anti-roll torsion bar connecting the two arms of the wheel support, comprising means for detecting the pivoting of the center point of the bar, elastic means for absorbing the vibratory components of the detected angular signal, means for transmitting the continuous component of the signal, and means for transforming this continuous component into a linear signal acting on the height detector, characterized in that the bar of torsion 2 has in the middle a knurled allowance 3 on which the information is taken. 2. - Dispositif de commande selon la revendication 1, carac térisd en ce que les moyens de détection comprennent une bague 4 fixée par serrage sur la partie moletée 3 9e la barre 2 et solidaire d'un doigt 4c entrarné en pivotement par le débattement de la suspension. 2. - control device according to claim 1, charac térisd in that the detection means comprise a ring 4 fixed by clamping on the knurled part 3 9e the bar 2 and integral with a finger 4c pivotally pivoted by the movement of suspension. 3. - Dispositif de commande selon la revendication 2, caractérisé en ce'que les moyens de transmission du signal comprennent une bague 8 montée coulissante et pivotante par rapport à la barre de torsion et solidaire d'un doigt 8a disposé parallèle au doigt de détection 4c. 3. - Control device according to claim 2, characterized in that the signal transmission means comprise a ring 8 mounted to slide and pivot relative to the torsion bar and secured to a finger 8a disposed parallel to the detection finger 4c. 4. - Dispositif de commande selon la revendication 3, caractérisé en ce que les moyens élastiques sont constitués par un ressort spiral 10 enroulé coaxialement à la barre de torsion et dont les deux extrémités sont montées croisées de part et d'autre du doigt de détection 4c et du doigt de transmission 8a avec un effort de précontrainte. 4. - Control device according to claim 3, characterized in that the elastic means consist of a spiral spring 10 wound coaxially with the torsion bar and the two ends of which are mounted crossed on either side of the detection finger 4c and the transmission finger 8a with a prestressing force. 5. - Dispositif de commande selon la revendication 3 ou 4, caractérisé en ce que les moyens de transformation du signal angulaire en signal linéaire agissant sur le correcteur, comprennent un ensemble de deux rotules 13 et 14 montées en alignement avec le tiroir 15 du correcteur 16 et dont les parties externes sont solidaires, les parties internes étant raccordées respectivement à la bague de transmission 8 et au tiroir 15 du correcteur 16. 5. - control device according to claim 3 or 4, characterized in that the means for transforming the angular signal into a linear signal acting on the corrector, comprise a set of two ball joints 13 and 14 mounted in alignment with the drawer 15 of the corrector 16 and whose external parts are integral, the internal parts being respectively connected to the transmission ring 8 and to the drawer 15 of the corrector 16. 6. - Dispositif de commande selon l'une des revendications précédentes, caractérisé en ce que la barre anti-roulis 2 et les moyens de détection, de transmission et les moyens élastiques sont situés à l'intérieur d'un tube 1 servant de traverse d'essieu et auquel se raccorde extérieurement le support du correc- teur.  6. - Control device according to one of the preceding claims, characterized in that the anti-roll bar 2 and the detection, transmission and elastic means are located inside a tube 1 serving as a cross axle and to which the corrector support is connected externally.
FR8404615A 1984-03-20 1984-03-20 HEIGHT CORRECTOR CONTROL DEVICE FOR REAR AXLE OF MOTOR VEHICLE Expired FR2561591B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8404615A FR2561591B1 (en) 1984-03-20 1984-03-20 HEIGHT CORRECTOR CONTROL DEVICE FOR REAR AXLE OF MOTOR VEHICLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8404615A FR2561591B1 (en) 1984-03-20 1984-03-20 HEIGHT CORRECTOR CONTROL DEVICE FOR REAR AXLE OF MOTOR VEHICLE

Publications (2)

Publication Number Publication Date
FR2561591A1 true FR2561591A1 (en) 1985-09-27
FR2561591B1 FR2561591B1 (en) 1988-07-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292392A1 (en) * 1987-05-20 1988-11-23 Automobiles Peugeot Axle with a torsion bar suspension and level adjustment
EP0382633A1 (en) * 1989-02-09 1990-08-16 Automobiles Peugeot Hydraulic height-adjusting device
FR2978700A1 (en) * 2011-08-01 2013-02-08 Derisys DEVICE FOR INDICATING THE LOAD OF A MOTOR VEHICLE

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2016753A (en) * 1933-02-24 1935-10-08 Gen Motors Corp Torsional spring system for vehicles
FR1094986A (en) * 1953-11-30 1955-05-25 Citroen Sa Andre Improvement of automatic devices to maintain constant vehicle height above the ground regardless of the load and the flexibility of the suspension
FR1195547A (en) * 1957-05-02 1959-11-18 Gen Motors Corp Fluid suspension for vehicle
FR1221465A (en) * 1958-04-03 1960-06-02 Engineering Res & Applic Ltd Device for adjusting the travel height or ground clearance of elastically suspended parts or frames of a vehicle
FR1539655A (en) * 1967-04-17 1968-09-20 Peugeot Advanced vehicle suspension
DE2419545A1 (en) * 1973-04-25 1974-11-14 Girling Ltd DEAD SPEED DEVICE FOR A VEHICLE LEVEL CONTROL
DE2456424A1 (en) * 1973-02-02 1976-06-16 Volkswagenwerk Ag Self levelling suspension - with single height monitor in centre of control rod linked to wheels of one axle
DE2607952A1 (en) * 1976-02-27 1977-09-01 Volkswagenwerk Ag Height adjustable hydraulic suspension - has hydraulic pressure from dampers used as measure of loading
FR2441504A1 (en) * 1978-11-20 1980-06-13 Nissan Motor AUTOMATIC LEVELING DEVICE FOR A HYDROPNEUMATIC SUSPENSION VEHICLE

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2016753A (en) * 1933-02-24 1935-10-08 Gen Motors Corp Torsional spring system for vehicles
FR1094986A (en) * 1953-11-30 1955-05-25 Citroen Sa Andre Improvement of automatic devices to maintain constant vehicle height above the ground regardless of the load and the flexibility of the suspension
FR1195547A (en) * 1957-05-02 1959-11-18 Gen Motors Corp Fluid suspension for vehicle
FR1221465A (en) * 1958-04-03 1960-06-02 Engineering Res & Applic Ltd Device for adjusting the travel height or ground clearance of elastically suspended parts or frames of a vehicle
FR1539655A (en) * 1967-04-17 1968-09-20 Peugeot Advanced vehicle suspension
DE2456424A1 (en) * 1973-02-02 1976-06-16 Volkswagenwerk Ag Self levelling suspension - with single height monitor in centre of control rod linked to wheels of one axle
DE2419545A1 (en) * 1973-04-25 1974-11-14 Girling Ltd DEAD SPEED DEVICE FOR A VEHICLE LEVEL CONTROL
DE2607952A1 (en) * 1976-02-27 1977-09-01 Volkswagenwerk Ag Height adjustable hydraulic suspension - has hydraulic pressure from dampers used as measure of loading
FR2441504A1 (en) * 1978-11-20 1980-06-13 Nissan Motor AUTOMATIC LEVELING DEVICE FOR A HYDROPNEUMATIC SUSPENSION VEHICLE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292392A1 (en) * 1987-05-20 1988-11-23 Automobiles Peugeot Axle with a torsion bar suspension and level adjustment
FR2615456A1 (en) * 1987-05-20 1988-11-25 Peugeot TORSION BAR SUSPENSION AXLE AND PLATE CORRECTION
EP0382633A1 (en) * 1989-02-09 1990-08-16 Automobiles Peugeot Hydraulic height-adjusting device
FR2978700A1 (en) * 2011-08-01 2013-02-08 Derisys DEVICE FOR INDICATING THE LOAD OF A MOTOR VEHICLE
EP2554409A3 (en) * 2011-08-01 2013-07-10 Derisys Device for indicating the load of a motor vehicle

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