FR2633564A1 - Servo control for the hydraulic suspension of the wheels in vehicles - Google Patents

Servo control for the hydraulic suspension of the wheels in vehicles Download PDF

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Publication number
FR2633564A1
FR2633564A1 FR8808726A FR8808726A FR2633564A1 FR 2633564 A1 FR2633564 A1 FR 2633564A1 FR 8808726 A FR8808726 A FR 8808726A FR 8808726 A FR8808726 A FR 8808726A FR 2633564 A1 FR2633564 A1 FR 2633564A1
Authority
FR
France
Prior art keywords
hydraulic
suspension
wheels
vehicles
servocontrol
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.)
Withdrawn
Application number
FR8808726A
Other languages
French (fr)
Inventor
Stanislaw Pietrzyk
Jan Galinski
Jean-Michel Kraus
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.)
COMMERCE SARL CIE
Original Assignee
COMMERCE SARL CIE
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 COMMERCE SARL CIE filed Critical COMMERCE SARL CIE
Priority to FR8808726A priority Critical patent/FR2633564A1/en
Publication of FR2633564A1 publication Critical patent/FR2633564A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60G21/06—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 fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/81—Interactive suspensions; arrangement affecting more than one suspension unit front and rear unit
    • B60G2204/8102—Interactive suspensions; arrangement affecting more than one suspension unit front and rear unit diagonally arranged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/82—Interactive suspensions; arrangement affecting more than one suspension unit left and right unit on same axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/50—Pressure
    • B60G2400/51—Pressure in suspension unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/30—Height or ground clearance

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention relates to a servocontrol for the hydraulic suspension of the wheels in vehicles, which may be applied to all vehicles equipped with hydraulic spring devices according to French Patent No. 88 08724. The servocontrol is intended to adjust the changes in the characteristics of the suspension of vehicles. This servocontrol makes it possible to change the height of the suspension as well as the stiffness of the suspension of vehicles. In addition, the servocontrol gives rise to the transmission of dynamic loads from one wheel to other wheels of the vehicle. The servocontrol includes four hydraulic spring devices D1, D2, D3 and D4 assembled to the four wheels R1, R2, R3 and R4 of this vehicle. A hydraulic pump P has a hydraulic connection with these devices. There are also hydraulic links 1 and 3 between the hydraulic transmitters 4 and 5 and the hydraulic spring devices. The application of the servocontrol for the hydraulic suspension of the wheels of vehicles enhances the safety and comfort of travelling.

Description

SERYDCOMMÀNDE POUR LA SUSPENSION HYDRAULIQUE
DES ROUES D8NS DES VEHICULES.SERYDCOMMÀNDE FOR HYDRAULIC SUSPENSION
WHEELS D8NS VEHICLES.

r presente invention concerne une servocommande pour la suspensiDn des roues dans des véhicules. The present invention relates to a servo control for suspending wheels in vehicles.

La servocommande est utilisée pour les changements des caractéristiques de la suspension des véhicules, notamment de la hauteur de la suspension, de son rigidite et de la transmission des charges dynamiques d'une roue sur les autres roues du véhicule
La servocommande faisant objet de la presente invention utilise pour la suspension de véhicules le dispositif ressort hydraulique décrit dans la demande de brevet frangais n0 tRO8Z24. Servo control is used for changes in vehicle suspension characteristics, such as suspension height, stiffness, and dynamic wheel load transmission to other vehicle wheels
The servocontrol object of the present invention uses for the suspension of vehicles the hydraulic spring device described in the French patent application No. 0882424.

Jusqu à présent on ne connaissait pas d'équipe ments exclusivement hydrauliques pouvant modifier les caracteristiques de la suspension du véhicule. Up to now no hydraulic equipment has been known which can modify the characteristics of the suspension of the vehicle.

Les seuls dispositifs hydrauliques utilisés dans la suspension des vhi cules ont pour but de régler excl L sivement la hauteur de la suspension. On connaissait aussi des equipements électro-hydrauliques et électromécaniques pour modifier les caractéristiques de la suspension; toutefols leur construction est très compliquée et nécessite l'usage des capteurs de déplacements.The only hydraulic devices used in the suspension of vehicles are to exclude the height of the suspension. Electro-hydraulic and electromechanical equipment were also known to modify the characteristics of the suspension; however, their construction is very complicated and requires the use of displacement sensors.

La servocommande selon la présente invention utilise des dispositifs ressorts hydrauliques appliqués aux roues du véhicule. Chaque dispositif ressort hydraulique possède une connection avec la pompe hydraulique. Cette pompe modifie le volume et la pression du liquide dans ces dispositifs. La modification du volume du liquide conduit au changement de la hauteur de la suspension, de meme le changement de la pression du liquide provoque la modification de la rigidité de la suspension. La connection hydraulique entre tous les dispositifs permet de transmettre les charges dynamiques d'une roue sur les autres.  The servocontrol according to the present invention uses hydraulic spring devices applied to the wheels of the vehicle. Each hydraulic spring device has a connection with the hydraulic pump. This pump alters the volume and pressure of the liquid in these devices. The change in the volume of the liquid leads to a change in the height of the suspension, and the change in the pressure of the liquid causes the suspension rigidity to change. The hydraulic connection between all the devices makes it possible to transmit the dynamic loads of one wheel on the others.

Les dessins suivants illustrent la présente
invention
La figure 1 représente un schéma fonctlonnel
de la servocommande ;
La figure 2 représente l'assemblage du
dispositif sur le véhicule (vue de face) ;
La servocommande représentée sur la figure 1 comporte quatre dispositifs ressorts hydrauliques
(Dl),(D2),(D3? et(D4) assemblés avec les quatre roues du véhicule (R1),(R2),(R3) et(R4). Une pompe hydraulique (P) est connectée å l'ensemble de quatre dispo sitifs (D1)s(D2),(D3) et (D4). Cette connection est constituée des conduits forcés (2).The following drawings illustrate this
invention
Figure 1 represents a functional diagram
servo control;
Figure 2 shows the assembly of
device on the vehicle (front view);
The servocontrol shown in FIG. 1 comprises four hydraulic spring devices
(D1), (D2), (D3 ?, and (D4) assembled with the four wheels of the vehicle (R1), (R2), (R3) and (R4) A hydraulic pump (P) is connected to the assembly of four devices (D1) s (D2), (D3) and (D4) This connection consists of the forced conduits (2).

La servocommande possède deux séries de liaisons hydrauliques. La prrmiére série est formée des conduits forcés (1) entre les dispositifs (D1) et (D3), et ensuite entre les dispositifs (D2) et (D4); lesdits conduits ( étant équipes des transmetteurs hydrauliques t5). La dexiéme série est constituée des conduits forces (3) entre les dispositfs (D1) et (D4), et entre (D2) et (D3j; lestsits conduits (3) étant équipés des transmetteurs hydrauliques (4). The servo control has two sets of hydraulic connections. The first series is formed of the forced conduits (1) between the devices (D1) and (D3), and then between the devices (D2) and (D4); said ducts (being teams of hydraulic transmitters t5). The second series consists of the force ducts (3) between the devices (D1) and (D4), and between (D2) and (D3j, the ducts (3) being equipped with hydraulic transmitters (4).

La servocommande représentée sur la figure 2 montre la fixation du dispositif ressort hydraulique (D1) sur le mécanisme de suspension de roue (kl). The servocontrol shown in FIG. 2 shows the attachment of the hydraulic spring device (D1) to the wheel suspension mechanism (k1).

Le dispositif possède une longueur (d).The device has a length (d).

Pendant le mouvement du véhicule les mécanismes de la suspension des roues (Rl),(R2),(R3) et (R4) sont soumis aux agissements de forces statiques et de forces dynamiques. La servocommande permet de répondre à ces forces en réglant les caractéristiques de la suspension des roues du véhicule. Rinsi, le changement de la hauteur de la suspension est provoqué par la modification du volume de liquide dans les dispositifs ressorts hydrauliques (D1 > F(D2),(D3) et(D4), obtenue par l'action de la pompe hydraulique (P).  During the movement of the vehicle the mechanisms of the suspension of the wheels (R1), (R2), (R3) and (R4) are subjected to the actions of static forces and dynamic forces. The servo control responds to these forces by adjusting the characteristics of the suspension of the vehicle wheels. Thus, the change in the height of the suspension is caused by the change in the volume of liquid in the hydraulic spring devices (D1> F (D2), (D3) and (D4), obtained by the action of the hydraulic pump ( P).

Ce changement de la hauteur de la suspension est linite par la longueur (d) de ces dispositifs.This change in the height of the suspension is linite by the length (d) of these devices.

Le changement de la rigidité de la suspension des roues est effectué par la modification de la pression du liquide dans les dispositifs (D1),(D2),(D3) et (D4) obtenue par l'action de la pompe hydraulique (P) chaque dispositif ayant une longueur (d) constante. The change of the stiffness of the suspension of the wheels is effected by the modification of the pressure of the liquid in the devices (D1), (D2), (D3) and (D4) obtained by the action of the hydraulic pump (P) each device having a constant length (d).

Les forces dynamiques qui agissent par example sur la rou; (R1) ptndont IF mouvement du véhicule changent la pression du liquide dans le dispositif (Dl > . La pression ainsi créée agit ensuite sur les transmetteurs hydrauliques (5) et (4) par l'intermédiaire des conduits forcés (1) et (3). Les impulsions hydrauliques (6) et (7) transmises par les transmetteurs (5) et (4), arrivent jusqu'aux dlsposltfs (D2), (D3) et (D4). Les transmetteurs hydrauliques (41 et (5 > agissent dans les de directions.Les impulsions hydrauligues (6) et (7) sont proportionnelles aux change ments os la pression du liquide dans le dispositif (D1). L'impulsion hydraulique (6) change temporairement la pression dans le dispositif (D3). Le transmetteur (4) change ensuite par la liaison (3) la pression dans le dispositif (D2); enfin l'impulsion hydraulique (7) modifie temporairement la pression dans le dispositif (D4). En résultat, l'action des impulsions hydrauliques (6) et (7) crée les forces dynamiques de réaction qui agissent temporairement sur les roues (R3) (R2) (k4). Dynamic forces acting for example on the rou; (R1) ptndont IF movement of the vehicle change the pressure of the liquid in the device (Dl> .The pressure thus created then acts on the hydraulic transmitters (5) and (4) via the forced ducts (1) and (3) The hydraulic pulses (6) and (7) transmitted by the transmitters (5) and (4) reach the terminals (D2), (D3) and (D4) and the hydraulic transmitters (41 and 5) The hydraulic pulses (6) and (7) are proportional to the changes in the pressure of the liquid in the device (D1) .The hydraulic pulse (6) temporarily changes the pressure in the device (D3). The transmitter (4) then changes the pressure in the device (D2) via the link (3) and the hydraulic pulse (7) temporarily modifies the pressure in the device (D4). (6) and (7) create the dynamic reaction forces acting temporarily on the wheels (R3 ) (R2) (k4).

La création des forces des réactions oynamiques augmente la stabilité du véhicule . Application de la servocommande pour la suspension hydraulique des roues dans les véhicules augmente la sécurité et le comfort de voyage.  The creation of the forces of the magnetic reactions increases the stability of the vehicle. Application of the servo control for the hydraulic suspension of the wheels in the vehicles increases the safety and comfort of travel.

Claims (1)

REVENDICATIONS l)La servocommande pour la suspension hydraulique des roues dans des véhicules comportant des dispositifs ressorts hydrauliques assemblés avec les quatre; roues du véhicule, ainsi qu'une pompe hydraulique, caractbriseP en ce que ladite pompe hydraulique (P) est branchée sur au moins un dispositif ressort hydraulique (Dl), et il existe au moins une liaison hydraulique entre les dispositifs (D1) et (D3) localisés sur la diagonale du véhicule et il existe aussi au moins une liaison hydraulique entre les dispositifs (D1) et (D4) localisés sur la partie latérale du vehicule. (l) Servo control for the hydraulic suspension of wheels in vehicles with hydraulic spring devices assembled with the four; vehicle wheels, and a hydraulic pump, characterized in that said hydraulic pump (P) is connected to at least one hydraulic spring device (D1), and there is at least one hydraulic connection between the devices (D1) and ( D3) located on the diagonal of the vehicle and there is also at least one hydraulic connection between the devices (D1) and (D4) located on the lateral part of the vehicle. 2)La servocommande selon la revendication 1 caractérisée en ce 4us la pompe hydraulique (P) change la pression ou le volume au liquide dans les disposltlfs ressorts hydrauliques (Dl) (D2) (D3) (D4). 2) The servocontrol according to claim 1, characterized in that the hydraulic pump (P) changes the pressure or volume to the liquid in the hydraulic spring devices (D1) (D2) (D3) (D4). 3)La servocommande selon les revendications 1 et 2 cara=térisée en ce que la pompe hydraulique (P) en modifiant la pression du liquide dans au moins un dispositif (D1) change la rigidité de la suspension de la roue (81).  3) The servo control according to claims 1 and 2 cara = terized in that the hydraulic pump (P) by changing the pressure of the liquid in at least one device (D1) changes the stiffness of the suspension of the wheel (81). 4)La servocommande selon les revendications 1 et 2 caractérisée en ce que la pompe hydraulique (P) en modifiant le volume du liquide dans va moins un dispositif (D1) change la longueur (d) de ce dispositif et la hauteur de la suspension du véhicule 4) The servo control according to claims 1 and 2 characterized in that the hydraulic pump (P) by changing the volume of the liquid in va minus a device (D1) changes the length (d) of this device and the height of the suspension of the vehicle 5)La servocommande selon la revendication 1 cara ctérisée en ce que les transmetteurs hydrauliques (4) et (5) sont introduits dans les liaisons hydrauliques entre les dispositifs (Dl > , (D2), (D3) et (D4).  5) The servocontrol according to claim 1, characterized in that the hydraulic transmitters (4) and (5) are introduced into the hydraulic connections between the devices (D1>, (D2), (D3) and (D4).
FR8808726A 1988-06-29 1988-06-29 Servo control for the hydraulic suspension of the wheels in vehicles Withdrawn FR2633564A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8808726A FR2633564A1 (en) 1988-06-29 1988-06-29 Servo control for the hydraulic suspension of the wheels in vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8808726A FR2633564A1 (en) 1988-06-29 1988-06-29 Servo control for the hydraulic suspension of the wheels in vehicles

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FR2633564A1 true FR2633564A1 (en) 1990-01-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7350612B2 (en) * 2002-09-02 2008-04-01 Hultdin System Ab Shock absorbing hydraulic system for all-terrain load-carrying vehicle, and all terrain load-carrying vehicle including such a hydraulic system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1488083A (en) * 1922-01-16 1924-03-25 Edward R Wolf Shock absorbing and distributing mechanism for automobiles and other vehicles
FR1183994A (en) * 1956-10-16 1959-07-16 Daimler Benz Ag Compensating device for vehicle wheel suspensions, in particular of motor cars
US3186730A (en) * 1961-05-11 1965-06-01 James W Angell Fluid suspension system for vehicles
FR1535641A (en) * 1967-06-19 1968-08-09 Ind Dev Company Establishments Vehicle leveling device fitted with hydropneumatic suspension
DE1630751A1 (en) * 1967-12-15 1971-06-09 Langen & Co Hydraulic circuit for vehicles
DE2311233A1 (en) * 1972-03-08 1973-09-13 Automotive Prod Co Ltd VEHICLE SUSPENSION
DE2844413A1 (en) * 1978-10-12 1980-04-30 Daimler Benz Ag Attitude control for car suspension - incorporates displacement monitors on dampers and inertial sensors linked to central control

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1488083A (en) * 1922-01-16 1924-03-25 Edward R Wolf Shock absorbing and distributing mechanism for automobiles and other vehicles
FR1183994A (en) * 1956-10-16 1959-07-16 Daimler Benz Ag Compensating device for vehicle wheel suspensions, in particular of motor cars
US3186730A (en) * 1961-05-11 1965-06-01 James W Angell Fluid suspension system for vehicles
FR1535641A (en) * 1967-06-19 1968-08-09 Ind Dev Company Establishments Vehicle leveling device fitted with hydropneumatic suspension
DE1630751A1 (en) * 1967-12-15 1971-06-09 Langen & Co Hydraulic circuit for vehicles
DE2311233A1 (en) * 1972-03-08 1973-09-13 Automotive Prod Co Ltd VEHICLE SUSPENSION
DE2844413A1 (en) * 1978-10-12 1980-04-30 Daimler Benz Ag Attitude control for car suspension - incorporates displacement monitors on dampers and inertial sensors linked to central control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7350612B2 (en) * 2002-09-02 2008-04-01 Hultdin System Ab Shock absorbing hydraulic system for all-terrain load-carrying vehicle, and all terrain load-carrying vehicle including such a hydraulic system

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