FR2505267A1 - Anti-dive shock-absorber for vehicle - contains fluid chamber linked to hydraulic brake circuit to pass extra fluid to main chamber - Google Patents
Anti-dive shock-absorber for vehicle - contains fluid chamber linked to hydraulic brake circuit to pass extra fluid to main chamber Download PDFInfo
- Publication number
- FR2505267A1 FR2505267A1 FR8109263A FR8109263A FR2505267A1 FR 2505267 A1 FR2505267 A1 FR 2505267A1 FR 8109263 A FR8109263 A FR 8109263A FR 8109263 A FR8109263 A FR 8109263A FR 2505267 A1 FR2505267 A1 FR 2505267A1
- Authority
- FR
- France
- Prior art keywords
- chamber
- vehicle
- shock
- braking
- absorber
- 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
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
Abstract
Description
L'invention a pour objet un perfectionnement aux amortisseurs hydrauliques pour la suspension de véhicules automobiles. The invention relates to an improvement in hydraulic shock absorbers for the suspension of motor vehicles.
Un amortisseur hydraulique pour la suspension d'un véhicule automobile doit assurer un amortissement convenable dans les diverses conditions d'utilisation du véhicule. La plupart du temps, ce résultat est obtenu moyennant un compromis entre la souplesse d'amortissement souhaitée pour le confort des occupants du véhicule d'une part, et vautre part la limitation de la déformation de la suspension qui, si elle est excessive, attente à la sécurité. A hydraulic shock absorber for the suspension of a motor vehicle must ensure adequate damping under the various conditions of use of the vehicle. Most of the time, this result is obtained by means of a compromise between the desired damping flexibility for the comfort of the occupants of the vehicle on the one hand, and on the other hand the limitation of the deformation of the suspension which, if excessive, waits security.
I)ans de nombreux véhicules conçus principalement pour le confort des occupants, un freinage brutal entrain un plongeon de la carrosserie du véhicule sous l'effet développé par la masse en mouvement de ladite carrosserie logeant le ou les occupants. I) years of many vehicles designed mainly for the comfort of the occupants, brutal braking leads to a plunge in the vehicle body under the effect developed by the moving mass of said body housing the occupant (s).
L'invention applique l'augmentation de la pression du liquide de freinage qui accompagne un freinage brutal pour raidir le ou les amortisseurs notamment les amortisseurs avant. The invention applies the increase in the pressure of the brake fluid which accompanies brutal braking in order to stiffen the shock absorber or shock absorbers, in particular the front shock absorbers.
Elle vise en particulier une réalisation s'appliquant avantageusement aux amortisseurs du type connu sous le nom de McPherson. It relates in particular to an embodiment which applies advantageously to shock absorbers of the type known under the name of McPherson.
Dans la description qui suit, faite à titre d'exemple, on se réfère au dessin annexé, dans lequel la figure unique représente une coupe axiale d'un amortisseur selon l'invention. In the description which follows, given by way of example, reference is made to the appended drawing, in which the single figure represents an axial section of a shock absorber according to the invention.
Une chemise cylindrique 11 est reliée à la partie non-suspendue du véhicule automobile. Sur cette chemise est fixée, à son extrémité inférieure 12, par exemple par soudure, une tête 13, en forme de calotte sphérique, de la face supérieure plane 14 de laquelle dépend un chapeau cylindro-tronconique 15 percé de lumières 16 mettant en communication la chambre 17 surplombant la face 14 avec un intervalle annulaire 18. A cylindrical jacket 11 is connected to the unsprung part of the motor vehicle. On this jacket is fixed, at its lower end 12, for example by welding, a head 13, in the form of a spherical cap, of the flat upper face 14 on which depends a cylindrical-frustoconical cap 15 pierced with lights 16 connecting the chamber 17 overhanging the face 14 with an annular gap 18.
Celui-ci est limité, d'une part, par la chemise 11 et, d'autre part, par un tube intérieur, ou tube de travail, 19.This is limited, on the one hand, by the jacket 11 and, on the other hand, by an inner tube, or working tube, 19.
Avec la surface cylindrique interne 21 dudit tube coopère à coulissement un piston 22, avec garniture d'étanchéité 23, porté par une tige 24 reliée à la partie suspendue du véhicule. Le piston 22 est traversé par des canaux 61 et 62 débouchant l'un et l'autre sur la face inférieure 63 et la face supérieure 64 dudit piston et dont des parties élargies 65 et 66 logent des ressorts, respectivement 67 et 68, destinés à appliquer sur leur siège, respectivement 69 et 71, d'une manière tarée, des billes 72 et 73. With the internal cylindrical surface 21 of said tube cooperates slidingly a piston 22, with seal 23, carried by a rod 24 connected to the suspended part of the vehicle. The piston 22 is crossed by channels 61 and 62 opening one and the other on the lower face 63 and the upper face 64 of said piston and of which enlarged parts 65 and 66 house springs, respectively 67 and 68, intended for apply on their seats, respectively 69 and 71, in a tared manner, balls 72 and 73.
Le tube 19 présente, hors de sa longueur avec laquelle coopère le piston 22, une nervure 25 faisant saillie dans la chambre 26 intérieure au tube 19. Âu-dessons dudit piston cette nervure sert de butée à une rondelle annulaire 27 sollicitée par un ressort 28 prenant appui par 8 on autre extrémité sur une coupelle 29 reposant sur la face supérieure 31 d'un corps cylindrique 32 dont dépend le chapeau 15 et solidaire par sa face cylindrique externe 33 du tube 19. Le corps 32 est traversé par des forages 34 débouchant sur la face supérieure 31 du corps 32 et sur la face inférieure 36 dudit corps. The tube 19 has, out of its length with which the piston 22 cooperates, a rib 25 projecting into the chamber 26 inside the tube 19. Below said piston, this rib serves as a stop for an annular washer 27 urged by a spring 28 supported by 8 or other end on a cup 29 resting on the upper face 31 of a cylindrical body 32 on which the cap 15 depends and secured by its external cylindrical face 33 of the tube 19. The body 32 is crossed by holes 34 opening on the upper face 31 of the body 32 and on the lower face 36 of said body.
Un passage central 37 met en communication la chambre 26 avec la chambre 17 à travers l'orifice central 30 de la coupelle 29. Avec l'arête 38 d'intersection du débouché du forage central 37 avec la face 36 coopère la surface latérale 39 d'un clapet conique 41 dont la queue cylindrique 42, de plus petit diamètre, sert de guidage à un ressort 43 s'appuyant d'une part sur la surface annulaire 44 du clapet 41 et, d'autre part, sur la face supérieure 45 d'un piston 46 coopérant avec une cheminée 48 que présente axialement la tête 13. La cheminée 48 montre une saillie interne 50 propre k coopérer avec la face supérieure 45 du piston 46. La cheminée 48 se prolonge par un taraudage 49 débouchant sur la face inférieure 51 de la tête 13.Le taraudage 49 sert au raccordement avec une canalisation schématisée en 53 reliée au circuit de freinage du véhicule. Un joint torique 52 assure la séparation entre l'huile que contient l'amortisseur et le liquide du circuit de freinage. A central passage 37 connects the chamber 26 with the chamber 17 through the central orifice 30 of the cup 29. With the edge 38 of intersection of the outlet of the central bore 37 with the face 36 cooperates the lateral surface 39 d '' a conical valve 41 whose cylindrical tail 42, of smaller diameter, serves as a guide for a spring 43 resting on the one hand on the annular surface 44 of the valve 41 and, on the other hand, on the upper face 45 of a piston 46 cooperating with a chimney 48 which the head 13 has axially. The chimney 48 shows an internal projection 50 suitable for cooperating with the upper face 45 of the piston 46. The chimney 48 is extended by a tapping 49 opening onto the face lower 51 of the head 13.The internal thread 49 is used for connection with a pipe shown diagrammatically at 53 connected to the vehicle braking circuit. An O-ring 52 ensures the separation between the oil contained in the shock absorber and the brake circuit fluid.
Aussi longtemps que le liquide de freinage n'est pas mis sous pression, l'amortisseur fonctionne à la manière habituelle : lorsque le piston 22 est sollicité vers le bas, la coupelle 29 est appliquée sur la face supérieure 31 du noyau ou corps 32 et obture les forages 34; l'augmentation de pression du liquide se trouvant dans la chambre 26 repousse le clapet 41, contre l'action du ressort 43, et le liquide circule dans le passage 37, parvient dans la chambre 17, traverse les trous ì 6 pour gagner la chambre annulaire 18. C'est le ressort 43 qui règle la pression du liquide dans la chambre 26 à partir de laquelle s'effectue l'amortissement en compression. As long as the brake fluid is not pressurized, the shock absorber operates in the usual way: when the piston 22 is pressed down, the cup 29 is applied to the upper face 31 of the core or body 32 and closes boreholes 34; the increase in pressure of the liquid in the chamber 26 pushes the valve 41, against the action of the spring 43, and the liquid circulates in the passage 37, reaches the chamber 17, passes through the holes ì 6 to reach the chamber annular 18. It is the spring 43 which regulates the pressure of the liquid in the chamber 26 from which the compression damping takes place.
Dans le cas d'un mouvement vers le haut du piston 22, la coupelle 29 se soulève contre l'action du ressort 28 et le liquide provenant de l'intervalle annulaire 19 et de la chambre 17 circule à travers les trous d'aspiration 34 pour gagner la chambre 26. In the case of an upward movement of the piston 22, the cup 29 lifts against the action of the spring 28 and the liquid coming from the annular gap 19 and from the chamber 17 circulates through the suction holes 34 to win room 26.
La bille 72 laisse passer l'huile pendant la compression et joue le rôle de clapet anti-retour. Un amortissement du mouvement du piston vers le haut est obtenu par l'action de la bille 73. The ball 72 lets the oil pass during compression and acts as a non-return valve. Damping of the upward movement of the piston is obtained by the action of the ball 73.
En cas de freinage du véhicule, notamment de freinage brutal, causé -par une augmentation de pression du liquide dans le circuit de freinage auquel est reliée la canalisation 53 la pression croit brusquement dans le compartiment 54 en dessous du piston 46 et ce dernier est repoussé, augmentant dautaat la force qui stexerce vers le haut sur le clapet 41; la position limite est celle pour laquelle la face supérieure 45 du piston 46 vient en butée contre l'épaulement 50 de la cheminée 48, et cela malgré l'action antagoniste du ressort 43. In the event of braking of the vehicle, in particular brutal braking, caused by an increase in the pressure of the liquid in the braking circuit to which the pipe 53 is connected, the pressure suddenly increases in the compartment 54 below the piston 46 and the latter is pushed back , increasing dautaat the force which exerts upwards on the valve 41; the limit position is that for which the upper face 45 of the piston 46 abuts against the shoulder 50 of the chimney 48, and this despite the antagonistic action of the spring 43.
Le fonctionnement de l'amortisseur en est modifié car le clapet 41 ne peut maintenant se soulever que si la pression qui s'exerce au-dessus de lui a une valeur telle quelle surmonte celle résultant de l'effet exercé par le ressort 43 en son nouvel état de précontrainte.The operation of the damper is modified because the valve 41 can now be lifted only if the pressure exerted above it has a value such as it overcomes that resulting from the effect exerted by the spring 43 in its new state of prestressing.
Dans cette condition, la carrosserie, qui est liée à la tige de piston 24, ne peut plonger d'une manière excessive sous effet de så masse et les conséquences qui résulteraient d'une telle plongée excessive sont écartées. In this condition, the body, which is linked to the piston rod 24, cannot dive excessively under the effect of mass and the consequences which would result from such excessive diving are ruled out.
Dès que la pédale de frein est relsschée, la pression dans le circuit de freinage diminue, le piston 46 revient à sa position initiale sous ltaction du ressort 43 et l'amortisseur est à nouveau dans sa condition de réglage normal, c'est-k-dire celle qui règne en dehors des périodes de freinage et pour laquelle la souplesse de l'amortissement assure un confort élevé aux occupants du véhicule. As soon as the brake pedal is released, the pressure in the brake circuit decreases, the piston 46 returns to its initial position under the action of the spring 43 and the shock absorber is again in its normal adjustment condition, that is k -to say that which prevails outside the periods of braking and for which the flexibility of the damping ensures a high comfort to the occupants of the vehicle.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8109263A FR2505267A1 (en) | 1981-05-08 | 1981-05-08 | Anti-dive shock-absorber for vehicle - contains fluid chamber linked to hydraulic brake circuit to pass extra fluid to main chamber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8109263A FR2505267A1 (en) | 1981-05-08 | 1981-05-08 | Anti-dive shock-absorber for vehicle - contains fluid chamber linked to hydraulic brake circuit to pass extra fluid to main chamber |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2505267A1 true FR2505267A1 (en) | 1982-11-12 |
FR2505267B1 FR2505267B1 (en) | 1984-08-31 |
Family
ID=9258251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8109263A Granted FR2505267A1 (en) | 1981-05-08 | 1981-05-08 | Anti-dive shock-absorber for vehicle - contains fluid chamber linked to hydraulic brake circuit to pass extra fluid to main chamber |
Country Status (1)
Country | Link |
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FR (1) | FR2505267A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4506751A (en) * | 1982-12-21 | 1985-03-26 | Applied Power Inc. | Tilt cab truck with anti-dive and anti-sway control |
US4572317A (en) * | 1982-11-01 | 1986-02-25 | Honda Giken Kogyo K.K. | Position control system for the body of a vehicle |
EP0475660A2 (en) * | 1990-09-11 | 1992-03-18 | Hyrad Corporation | Quick response adjustable shock absorber & system |
WO2015158675A1 (en) * | 2014-04-16 | 2015-10-22 | BORDIER, Alain | Hydraulic shock absorber with compression filtering |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698068A (en) * | 1950-11-10 | 1954-12-28 | Frank J Hein | Vehicle dive arrester |
DE928933C (en) * | 1954-04-06 | 1955-06-13 | Werner Rappolt | Hydraulically acting stabilizer |
US2718285A (en) * | 1952-12-26 | 1955-09-20 | Jr James A Largay | Remotely adjustable shock absorber |
DE1006277B (en) * | 1956-04-09 | 1957-04-11 | Werner Rappolt | Hydraulically acting stabilizer |
FR2006028A1 (en) * | 1968-04-11 | 1969-12-19 | Koning Arie De | |
DE1455874A1 (en) * | 1965-05-11 | 1970-01-29 | Rheinmetall Gmbh | Hydraulic vibration damper |
FR2024188A1 (en) * | 1968-11-25 | 1970-08-28 | Gen Motors Corp | |
US3537715A (en) * | 1968-02-19 | 1970-11-03 | Robert R Gualdoni | Snubbing means for automotive vehicle |
FR2293327A1 (en) * | 1974-12-04 | 1976-07-02 | Bardot Michel | Automatically stable shock absorber - has hollow piston rod drawing oil into chamber via valve |
DE2915489A1 (en) * | 1978-04-17 | 1979-10-25 | Kayaba Industry Co Ltd | FRONT SHOCK ABSORBER DEVICE FOR WHEELED VEHICLES |
DE2915012A1 (en) * | 1979-04-12 | 1980-11-06 | Volkswagenwerk Ag | Motor vehicle wheel suspension - has front axle shock absorbers and flow restricted by=pass linked to brake line |
-
1981
- 1981-05-08 FR FR8109263A patent/FR2505267A1/en active Granted
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698068A (en) * | 1950-11-10 | 1954-12-28 | Frank J Hein | Vehicle dive arrester |
US2718285A (en) * | 1952-12-26 | 1955-09-20 | Jr James A Largay | Remotely adjustable shock absorber |
DE928933C (en) * | 1954-04-06 | 1955-06-13 | Werner Rappolt | Hydraulically acting stabilizer |
DE1006277B (en) * | 1956-04-09 | 1957-04-11 | Werner Rappolt | Hydraulically acting stabilizer |
DE1455874A1 (en) * | 1965-05-11 | 1970-01-29 | Rheinmetall Gmbh | Hydraulic vibration damper |
US3537715A (en) * | 1968-02-19 | 1970-11-03 | Robert R Gualdoni | Snubbing means for automotive vehicle |
FR2006028A1 (en) * | 1968-04-11 | 1969-12-19 | Koning Arie De | |
FR2024188A1 (en) * | 1968-11-25 | 1970-08-28 | Gen Motors Corp | |
FR2293327A1 (en) * | 1974-12-04 | 1976-07-02 | Bardot Michel | Automatically stable shock absorber - has hollow piston rod drawing oil into chamber via valve |
DE2915489A1 (en) * | 1978-04-17 | 1979-10-25 | Kayaba Industry Co Ltd | FRONT SHOCK ABSORBER DEVICE FOR WHEELED VEHICLES |
DE2915012A1 (en) * | 1979-04-12 | 1980-11-06 | Volkswagenwerk Ag | Motor vehicle wheel suspension - has front axle shock absorbers and flow restricted by=pass linked to brake line |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4572317A (en) * | 1982-11-01 | 1986-02-25 | Honda Giken Kogyo K.K. | Position control system for the body of a vehicle |
US4506751A (en) * | 1982-12-21 | 1985-03-26 | Applied Power Inc. | Tilt cab truck with anti-dive and anti-sway control |
EP0475660A2 (en) * | 1990-09-11 | 1992-03-18 | Hyrad Corporation | Quick response adjustable shock absorber & system |
EP0475660A3 (en) * | 1990-09-11 | 1993-08-04 | Hyrad Corporation | Quick response adjustable shock absorber & system |
WO2015158675A1 (en) * | 2014-04-16 | 2015-10-22 | BORDIER, Alain | Hydraulic shock absorber with compression filtering |
FR3020104A1 (en) * | 2014-04-16 | 2015-10-23 | Jacques Sirven | HYDRAULIC SHOCK ABSORBER WITH COMPRESSION FILTERING |
CN106662192A (en) * | 2014-04-16 | 2017-05-10 | 阿兰.波蒂耶 | Hydraulic shock absorber with compression filtering |
US10288143B2 (en) | 2014-04-16 | 2019-05-14 | Alain BORDIER | Hydraulic shock absorber with compression filtering |
CN106662192B (en) * | 2014-04-16 | 2019-11-01 | 阿兰.波蒂耶 | Hydraulic attenuator with compression filtering |
Also Published As
Publication number | Publication date |
---|---|
FR2505267B1 (en) | 1984-08-31 |
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