FR2665670A1 - DEVICE FOR DAMPING MOTION PHASES. - Google Patents
DEVICE FOR DAMPING MOTION PHASES. Download PDFInfo
- Publication number
- FR2665670A1 FR2665670A1 FR9110068A FR9110068A FR2665670A1 FR 2665670 A1 FR2665670 A1 FR 2665670A1 FR 9110068 A FR9110068 A FR 9110068A FR 9110068 A FR9110068 A FR 9110068A FR 2665670 A1 FR2665670 A1 FR 2665670A1
- Authority
- FR
- France
- Prior art keywords
- damping
- frequency
- suspension
- cylinder
- dynamic wheel
- 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
Links
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
- B60G17/016—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 their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
- B60G17/0165—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 their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
-
- 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
- B60G17/018—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 use of a specific signal treatment or control method
-
- 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
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
-
- 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
- B60G2202/20—Type of damper
- B60G2202/24—Fluid damper
-
- 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
- B60G2400/20—Speed
- B60G2400/206—Body oscillation speed; Body vibration frequency
-
- 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
- B60G2400/80—Exterior conditions
- B60G2400/82—Ground surface
- B60G2400/821—Uneven, rough road sensing affecting vehicle body vibration
-
- 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
- B60G2400/90—Other conditions or factors
- B60G2400/91—Frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/10—Damping action or damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/60—Signal noise suppression; Electronic filtering means
- B60G2600/602—Signal noise suppression; Electronic filtering means high pass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/16—Running
- B60G2800/162—Reducing road induced vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/90—System Controller type
- B60G2800/91—Suspension Control
- B60G2800/916—Body Vibration Control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Tires In General (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Un dispositif d'amortissement pour une suspension de véhicule comprend un élément amortisseur et un élément élastique. Une charge de roue dynamique est réductible par intervention dans l'élément amortisseur (4) au moyen d'une élévation de la raideur passive de l'élément élastique (3), élévation qui s'effectue en fonction de la fréquence, afin de changer les charges de roue dynamiques dans le sens d'une diminution. Le dispositif est applicable en particulier aux véhicules routiers.A damping device for a vehicle suspension comprises a damping element and an elastic element. A dynamic wheel load is reducible by intervention in the damping element (4) by means of an increase in the passive stiffness of the elastic element (3), which increases as a function of the frequency, in order to change dynamic wheel loads in the direction of decrease. The device is applicable in particular to road vehicles.
Description
L'invention part d'un dispositif pour amortir des phases de mouvement deThe invention starts from a device for damping phases of movement of
deux corps ou masses se déplaçant à des vitesses variables l'un par rapport à l'autre et dans leurs positions absolues, en particulier pour amortir des suspensions élastiques de roues de véhicules, comprenant un piston mobile dans un cylindre d'amortissement et partageant l'intérieur de ce cylindre en deux chambres de travail, le cylindre et le piston de l'élément amortisseur ainsi formé étant reliés chacun, ensemble avec un élément élastique monté en parallèle two bodies or masses moving at variable speeds relative to one another and in their absolute positions, in particular for damping elastic suspensions of vehicle wheels, comprising a piston movable in a damping cylinder and sharing the interior of this cylinder in two working chambers, the cylinder and the piston of the damping element thus formed being each connected together with an elastic element mounted in parallel
avec l'élément amortisseur, à l'un des corps ou masses. with the damping element, to one of the bodies or masses.
Un tel dispositif est connu (DE-OS 35 24 862). Such a device is known (DE-OS 35 24 862).
Dans le cas de ce dispositif connu, on inter- In the case of this known device,
vient au moyen d'une commande dans le refoulement volumique du cylindre d'amortissement, de sorte que ce dispositif devient alors ce que l'on appelle un système d'amortissement actif ou semi-actif Cependant, un tel dispositif n'agit pas spécialement dans le domaine de la comes by means of a command in the volume discharge of the damping cylinder, so that this device then becomes what is called an active or semi-active damping system However, such a device does not act specially in the field of
fréquence propre des roues.frequency of the wheels.
L'un des buts de l'invention est de remédier à cet inconvénient A cet effet, selon l'invention, un dispositif comme défini au début est caractérisé en ce qu'une charge de roue dynamique dans le domaine de la fréquence propre de la roue est réductible par une intervention dans l'élément amortisseur au moyen d'une élévation de la raideur passive de l'élément élastique, One of the aims of the invention is to remedy this drawback. For this purpose, according to the invention, a device as defined at the beginning is characterized in that a dynamic wheel load in the field of the natural frequency of the wheel is reducible by an intervention in the damping element by means of an elevation of the passive stiffness of the elastic element,
élévation qui est fonction de la fréquence. elevation that is a function of frequency.
Un dispositif ainsi réalisé a l'avantage, comparativement a l'état actuel de la technique, qu'il change les charges de roue dynamiques de véhicules routiers en particulier, dans le sens d'une diminution, de manière que la sécurité de marche et la tenue de cap soient améliorées et que, en même temps, les pertes de confort soient plus faibles comparativement à des A device thus produced has the advantage, compared to the current state of the art, that it changes the dynamic wheel loads of road vehicles in particular, in the sense of a decrease, so that the safety of walking and course keeping are improved and that, at the same time, the comfort losses are lower compared to
solutions connues.known solutions.
Il a en outre l'avantage d'être moins bruyant. It has the added advantage of being less noisy.
D'autres caractéristiques et avantages de Other features and benefits of
l'invention ressortiront plus clairement de la descrip- the invention will become clearer from the description of
tion qui va suivre d'un exemple de réalisation non limitatif, ainsi que des dessins annexés, sur lesquels: la figure 1 est un schéma d'un modèle de suspension de véhicule; et les figures 2 à 5 sont des diagrammes de différentes caractéristiques de réponse en fréquence The following is a non-limiting example of embodiment, and the accompanying drawings, in which: FIG. 1 is a diagram of a vehicle suspension model; and Figures 2 to 5 are diagrams of different frequency response characteristics
s'appliquant au modèle selon la figure 1. applying to the model according to Figure 1.
no La figure 1 représente un système de suspen- No. 1 represents a suspension system
sion actif ou semi-actif d'un véhicule, comprenant, entre une masse suspendue 1 du véhicule et une masse 2 d'une roue, un élément élastique 3 et, en parallèle avec ce dernier, un élément amortisseur 4 pour la suspension de la carrosserie du véhicule La masse 2 de la roue s'appuie élastiquement ce qui est symbolisé par un ressort 5 sur une chaussée 6 Les inégalités de la chaussée 6 sont en outre désignées par U, la course de compression élastique de la roue par X r et le mouvement de la carrosserie du véhicule par Xa* Un organe de réglage 7 a pour but de réduire la charge de roue dynamique Pdyn par intervention dans l'élément amortisseur 4 (semi-actif ou entièrement actif) au moyen d'une élévation en fonction de la fréquence de la raideur de l'élément élastique 3 Une active or semi-active transmission of a vehicle, comprising, between a suspension mass 1 of the vehicle and a mass 2 of a wheel, an elastic element 3 and, in parallel with the latter, a damping element 4 for the suspension of the vehicle body The mass 2 of the wheel is resiliently supported what is symbolized by a spring 5 on a roadway 6 The inequalities of the roadway 6 are further denoted by U, the elastic compression stroke of the wheel by X r and the movement of the vehicle body by Xa * An adjusting member 7 is intended to reduce the dynamic wheel load Pdyn by intervention in the damping element 4 (semi-active or fully active) by means of a rise in function of the frequency of the stiffness of the elastic element 3
telle réduction est opérée à l'aide de moyens électro- such reduction shall be effected by means of electronic means
niques et de vannes ou d'organes de réglage à électro- and valves or regulating devices with electro-
aimant par exemple Le but de cette réduction est que la charge de roue dynamique Cr (Xr U) reste aussi petite magnet for example The purpose of this reduction is that the dynamic wheel load Cr (Xr U) remains as small
que possible.as possible.
Les figures 2 et 3 représentent, pour com- mencer, deux premiers diagrammes Sur chacun d'eux, la fréquence est indiquée en Hz en abscisses, tandis que l'amplitude de la caractéristique de réponse en fré-35 quence X a/U est indiquée en ordonnées sur l'un (figure 2) et l'amplitude de la caractéristique de réponse en FIGS. 2 and 3 show, for the first time, two first diagrams. On each of them, the frequency is indicated in Hz as the abscissa, while the amplitude of the frequency response characteristic X a / U is indicated on the ordinate on one (Figure 2) and the amplitude of the response characteristic in
Fréquence Pdyn/U de la raideur de suspension est indi- Pdyn / U frequency of the suspension stiffness is indi-
quée en ordonnées sur l'autre (figure 3) Les deux diagrammes contiennent une courbe en trait plein pour un système passif à ajustement normal, une courbe en traits mixtes pour un système passif à amortissement élevé et une courbe en tireté pour un système passif à haute raideur de suspension On voit, d'après les courbes de fréquence significatives pour le confort et la charge de roue dynamique, que la charge de roue dynamique peut10 être réduite dans le domaine de la fréquence propre de la roue, c'est-à-dire entre 10 et 15 Hz, par élévation de la raideur de suspension passive, sans dégrader de The two diagrams contain a solid line curve for a normal-fit passive system, a dashed line curve for a high-damping passive system, and a dashed curve for a passive passive system. high suspension stiffness It can be seen from the significant frequency curves for comfort and dynamic wheel load that the dynamic wheel load can be reduced in the range of the natural frequency of the wheel, ie between 10 and 15 Hz, by raising the passive suspension stiffness without degrading
façon notable le confort dans ce domaine de fréquences. noticeably the comfort in this frequency range.
Les diagrammes selon les figures 2 et 3 permettent de tirer les conclusions suivantes: Domaine de fréquences amort. élevé The diagrams according to FIGS. 2 and 3 make it possible to draw the following conclusions: damped frequency domain. high
grande raid.great raid.
de suspens.suspense.
standard f < 1 Hz L Hz<f< 5 Hz confort ch.roue dynam. mauvais mauvaise standard f <1 Hz L Hz <f <5 Hz comfort dynam. bad bad
très mauv.very bad
très mauv.very bad
satisfais. satisfais. Hz<f<+l Hz confort ch roue dynam. meet these criteria. meet these criteria. Hz <f <+ l Hz comfort ch dynam.
très mauv.very bad
mauvaise bon bonne satisfais. satisfais. bad good good good. meet these criteria.
très mauv.very bad
très bonne suffisant bonne satisfais. satisfais. confort ch.roue dynam. bon bonne bon bonne bon bonne f > 1 Hz confort ch.roue dynam. Ce tableau montre qu'une grande raideur de suspension dans le domaine de la fréquence propre de la roue réduit la charge de roue dynamique sans dégrader de very good good enough. meet these criteria. comfort dynam. good good good good good good> 1 Hz comfort dynam. This table shows that a high stiffness of suspension in the field of the natural frequency of the wheel reduces the dynamic wheel load without degrading
façon importante le confort dans ce domaine (contraire- important way comfort in this area (contrary-
ment à l'élévation de l'amortissement passif). Afin d'éviter la mauvaise charge de roue dynamique et le mauvais confort dans le domaine de 1 à 5 Hz, il est proposé, conformément à l'invention, d'ap- pliquer une force supplémentaire F R proportionnellement10 à la course de compression de la suspension, course qui increase in the passive depreciation). In order to avoid the bad dynamic wheel load and the poor comfort in the range of 1 to 5 Hz, it is proposed, in accordance with the invention, to apply an additional force FR proportionally to the compression stroke of the suspension, race
est soumise à un filtrage passe-haut. is subject to high-pass filtering.
Les figures 4 et 5 montrent quel effet l'ap- plication d'une telle force produit sur le confort et la charge de roue dynamique.15 L'allure de la courbe pour un système ainsi réglé, à raideur de suspension fonction de la fréquence, est indiquée sur les figures 4 et 5 par une ligne en pointillé Il ressort de la figure 4 que le confort dans le domaine de la fréquence propre de la roue, de 10 à 15 Hz, se dégrade de peu seulement, mais il est à noter que l'isolement de la carrosserie à l'égard des inégalités de la chaussée est bien meilleur qu'avec un système à FIGS. 4 and 5 show the effect of the application of such a force on comfort and dynamic wheel load. The shape of the curve for a system thus adjusted, with suspension stiffness depending on the frequency is shown in Figures 4 and 5 by a dotted line It is apparent from Figure 4 that the comfort in the field of the natural frequency of the wheel, 10 to 15 Hz, degrades only slightly, but it is note that the isolation of the bodywork with respect to the unevenness of the roadway is much better than with a system with
amortissement passif élevé.high depreciation.
La figure 5 montre que l'application de l'invention permet de réduire d'environ 25 % la charge de roue dynamique dans le domaine de la fréquence propre FIG. 5 shows that the application of the invention makes it possible to reduce by approximately 25% the dynamic wheel load in the domain of the natural frequency.
de la roue, de 10 à 15 Hz, sans qu'il y ait des dégra- dations notables, comparativement à un système conven- tionnel, en d'autres domaines de fréquences. of the wheel, from 10 to 15 Hz, without there being noticeable degradation, compared to a conventional system, in other frequency domains.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904024966 DE4024966A1 (en) | 1990-08-07 | 1990-08-07 | Wheel suspension with piston and spring in parallel - has system for increasing passive stiffness of spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2665670A1 true FR2665670A1 (en) | 1992-02-14 |
| FR2665670B1 FR2665670B1 (en) | 1993-07-09 |
Family
ID=6411758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9110068A Expired - Fee Related FR2665670B1 (en) | 1990-08-07 | 1991-08-07 | DEVICE FOR DAMPING MOVEMENT PHASES. |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH04230410A (en) |
| DE (1) | DE4024966A1 (en) |
| FR (1) | FR2665670B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1271171B (en) * | 1993-04-08 | 1997-05-27 | Fichtel & Sachs Ag | SHOCK ABSORBER OPERATING SELECTIVELY IN THE FREQUENCY |
| DE4327358C2 (en) * | 1993-04-08 | 1995-04-13 | Fichtel & Sachs Ag | Frequency-selective vibration damper |
| DE19904530A1 (en) * | 1999-02-04 | 2000-08-10 | Bayerische Motoren Werke Ag | Impact absorber for vehicle bumper etc. has differential cylinder connected to pressure system for applying variable force with controllable force-distance characteristic |
| DE19915635B4 (en) * | 1999-04-07 | 2009-04-02 | Volkswagen Ag | Vibration system for the damping and / or eradication of the vibrations of a motor vehicle axle |
| JP4573102B2 (en) * | 2004-11-10 | 2010-11-04 | 清水建設株式会社 | Ultrasonic motor and variable stiffness spring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151421A2 (en) * | 1984-01-20 | 1985-08-14 | Nissan Motor Co., Ltd. | Automotive suspension control system with road-condition-dependent damping characteristics |
| FR2562844A1 (en) * | 1984-04-14 | 1985-10-18 | Bosch Gmbh Robert | DEVICE FOR CONTROLLING THE DURATION OF THE SUSPENSION OF A VEHICLE |
| EP0197316A2 (en) * | 1985-04-12 | 1986-10-15 | Robert Bosch Gmbh | Device for damping motions |
| DE3518503C1 (en) * | 1985-05-23 | 1986-10-23 | Daimler-Benz Ag, 7000 Stuttgart | Device for computer-aided, road-dependent control of dampers of a vehicle suspension |
| DE3633159A1 (en) * | 1985-10-12 | 1987-04-16 | Volkswagen Ag | Method and circuit arrangement for the adaptive regulation and/or control of chassis parameters of a road vehicle |
| JPS62198513A (en) * | 1986-02-25 | 1987-09-02 | Atsugi Motor Parts Co Ltd | Damping force control device for hydraulic buffer |
| US4733875A (en) * | 1985-04-22 | 1988-03-29 | Nec Home Electronics Ltd. | Vehicle height control apparatus |
| DE3640152A1 (en) * | 1985-12-04 | 1988-11-24 | Volkswagen Ag | Wheel suspension for a vehicle with a frequency-controlled damper |
-
1990
- 1990-08-07 DE DE19904024966 patent/DE4024966A1/en not_active Withdrawn
-
1991
- 1991-08-02 JP JP19381591A patent/JPH04230410A/en active Pending
- 1991-08-07 FR FR9110068A patent/FR2665670B1/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151421A2 (en) * | 1984-01-20 | 1985-08-14 | Nissan Motor Co., Ltd. | Automotive suspension control system with road-condition-dependent damping characteristics |
| FR2562844A1 (en) * | 1984-04-14 | 1985-10-18 | Bosch Gmbh Robert | DEVICE FOR CONTROLLING THE DURATION OF THE SUSPENSION OF A VEHICLE |
| EP0197316A2 (en) * | 1985-04-12 | 1986-10-15 | Robert Bosch Gmbh | Device for damping motions |
| US4733875A (en) * | 1985-04-22 | 1988-03-29 | Nec Home Electronics Ltd. | Vehicle height control apparatus |
| DE3518503C1 (en) * | 1985-05-23 | 1986-10-23 | Daimler-Benz Ag, 7000 Stuttgart | Device for computer-aided, road-dependent control of dampers of a vehicle suspension |
| DE3633159A1 (en) * | 1985-10-12 | 1987-04-16 | Volkswagen Ag | Method and circuit arrangement for the adaptive regulation and/or control of chassis parameters of a road vehicle |
| DE3640152A1 (en) * | 1985-12-04 | 1988-11-24 | Volkswagen Ag | Wheel suspension for a vehicle with a frequency-controlled damper |
| JPS62198513A (en) * | 1986-02-25 | 1987-09-02 | Atsugi Motor Parts Co Ltd | Damping force control device for hydraulic buffer |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 12, no. 52 (M-668)(2899) 17 Février 1988 & JP-A-62 198 513 ( ATSUGI ) 2 Septembre 1987 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2665670B1 (en) | 1993-07-09 |
| JPH04230410A (en) | 1992-08-19 |
| DE4024966A1 (en) | 1992-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |