FR2601310A1 - Device preventing the wheels of a motor vehicle from locking during braking - Google Patents

Device preventing the wheels of a motor vehicle from locking during braking Download PDF

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Publication number
FR2601310A1
FR2601310A1 FR8610241A FR8610241A FR2601310A1 FR 2601310 A1 FR2601310 A1 FR 2601310A1 FR 8610241 A FR8610241 A FR 8610241A FR 8610241 A FR8610241 A FR 8610241A FR 2601310 A1 FR2601310 A1 FR 2601310A1
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France
Prior art keywords
wheels
motor vehicle
braking
hydraulic pump
brake caliper
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FR8610241A
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French (fr)
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FR2601310B1 (en
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Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4095—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system including wheel driven pumps for detecting a speed condition

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

This simple mechanical device consists of a hydraulic pump (one pump for each of the wheels), admitting, by means of a dispensing piston, the initial braking pressure supplied by the master cylinder, onto either of the two opposed pistons of different diameters of a disk brake floating calliper.

Description

DESCRIPTION
La présente invention concerne un dispositif simple évitant le blocage des roues d'un véhicule lors d'un freinage puissant (P. 1/4).DESCRIPTION
The present invention relates to a simple device preventing the locking of the wheels of a vehicle during powerful braking (P. 1/4).

Sur un véhicule automobile classique, muni de freins à disque, le freinage est obtenu par l'action de serrage de deux patins solidaires du portemoyeu sur un disque solidaire de la roue. On a conventional motor vehicle, fitted with disc brakes, braking is obtained by the clamping action of two pads integral with the hub carrier on a disc integral with the wheel.

Ces deux patins sont plus ou moins appliqués sur le disque par la force hydraulique créée par le conducteur lorsque celui-ci appuie sur. la pédale de frein. These two pads are more or less applied to the disc by the hydraulic force created by the driver when the latter presses. the brake pedal.

Lors d'un freinage puissant, la pression d'application au niveau des patins est telle qu'une ou plusieurs roues se bloquent, notamment lorsque l'adhérence des roues sur le sol est faible, cette adhérence variant suivant l'état du revêtement du sol, l'état des pneus, les conditions atmosphériques, etc
Ce blocage a pour effet d'annuler complétement l'adhérence et donc d'allonger considérablement la longueur de freinage et de déséquilibrer le véhicule.During powerful braking, the application pressure at the pads is such that one or more wheels lock, especially when the grip of the wheels on the ground is weak, this grip varying according to the state of the coating of the soil, tire condition, weather conditions, etc.
This blocking has the effect of completely canceling grip and therefore considerably lengthening the braking length and unbalancing the vehicle.

La solution "humaine" consisterait alors à relacher la pédale de frein pour libérer la ou les roues et redonner ainsi de l'adhérence, puis refreiner. Or, il s'agit d'un réflexe conditionné que n'a pas la majorité des conducteurs. The "human" solution would then consist in releasing the brake pedal to release the wheel (s) and thus restore grip, then brake. However, it is a conditioned reflex that most drivers do not have.

Il existe des systèmes anti-blocage basés sur l'électronique, sophistiqués et donc onéreux. There are sophisticated, and therefore expensive, electronic-based anti-blocking systems.

Le but de la présente invention est la réalisation d'un système simple, mécanique, et d'un prix de revient bas. The object of the present invention is the production of a simple, mechanical system with a low cost price.

Une petite pompe à huile, à engrenage (par ex.) de faible débit, fonctionnant en circuit fermé (P. 2) est entraînée solidairement à la roue (disque de frein, moyeu, etc ...). A small oil pump, with gear (eg) of low flow rate, operating in a closed circuit (P. 2) is driven integrally with the wheel (brake disc, hub, etc.).

Cette pompe agit sur un piston distributeur (P. 1 et 2), ce distributeur admettant la pression de freinage sur l'un ou l'autre des deux pistons opposés de diamètres différents d'un même étrier flottant de disque de frein (P. 4). This pump acts on a distributor piston (P. 1 and 2), this distributor admitting the braking pressure on one or the other of the two opposite pistons of different diameters of the same floating brake disc caliper (P. 4).

Lors d'un freinage "normal", la pompe hydrauligque débite, même à faible vitesse de rotation. During "normal" braking, the hydraulic pump delivers, even at low speed.

Le piston distributeur (P. 3, fig. 3), de par sa.position, permet le passage de la pression de freinage de "a" en "b", c'est-à-dire en direction du gros piston de l'étrier (P. 4). The distributor piston (P. 3, fig. 3), by its position, allows the passage of the braking pressure from "a" to "b", that is to say towards the large piston of the '' caliper (P. 4).

Celui-ci pousse la plaquette correspondante sur le disque.  This pushes the corresponding plate on the disc.

L'étrier flottant se déplace dans le sens V (P. 4, fig. 6). The floating bracket moves in direction V (P. 4, fig. 6).

Le petit piston s'enfonce jusqu'à ce que sa plaquette vienne en butée. The small piston sinks until its plate comes to a stop.

Si la force de freinage est trop importante, la roue se bloque. If the braking force is too great, the wheel locks up.

La pompe ne débite plus. The pump no longer delivers.

Le piston-distributeur (P. 3, fig. 4), poussé par le ressort, se déplace vers la droite. The piston-distributor (P. 3, fig. 4), pushed by the spring, moves to the right.

La pression du maitre-cylindre est alors transmise de "a" en "c", vers le piston de l'etrier (P. 4, fig. 5). The pressure of the master cylinder is then transmitted from "a" to "c", towards the caliper piston (P. 4, fig. 5).

Celui-ci pousse la plaquette correspondante. This pushes the corresponding plate.

L'étrier se déplace dans le sens W (P. 4, fig. 5), tandis que le gros piston se retire et l'huile résiduelle est refoulée de "b" en "d", vers le réservoir de Lookeed. The caliper moves in the W direction (P. 4, fig. 5), while the large piston is withdrawn and the residual oil is pumped from "b" to "d", towards the Lookeed tank.

La force pressante au niveau des plaquettes étant moindre du fait de la surface plus petite du piston, le blocage de la roue cesse, la pompe hydraulique débite à nouveau, le piston distributeur reprend sa position initiale (P. 3, fig. 3).  The pressing force at the pads being less due to the smaller surface of the piston, the blocking of the wheel stops, the hydraulic pump flows again, the distributor piston returns to its initial position (P. 3, fig. 3).

Claims (1)

REVENDICATIONS Revendication 1 Claim 1 Dispositif pour éviter le blocage des roues d'un véhicule automobile lors d'un freinage puissant, caractérisé par l'utilisation d'une petite pompe hydraulique à faible débit, entrainée par le moyeu de chaque roue, et agissant sur un piston distributeur de débit, permettant à la pression initiale de freinage du circuit classique de s'exercer sur l'un ou l'autre des deux pistons opposés de diamètre différent d'un étrier de frein, flottant, modifiant ainsi la force pressante au niveau des plaquettes de frein. Device for preventing the locking of the wheels of a motor vehicle during powerful braking, characterized by the use of a small hydraulic pump with low flow rate, driven by the hub of each wheel, and acting on a flow distributor piston , allowing the initial braking pressure of the conventional circuit to be exerted on one or the other of the two opposite pistons of different diameter of a floating brake caliper, thus modifying the pressing force at the level of the brake pads . Revendication 2 Claim 2 Dispositif selon revendication 1, caractérisé par le fait que la pression initiale est dirigée selon le cas, vers deux circuits différents pour chacune des roues et ce, par un piston distributeur de débit. Device according to claim 1, characterized in that the initial pressure is directed, as the case may be, to two different circuits for each of the wheels and this, by a flow distributor piston. Revendication 3 Claim 3 Dispositif selon revendications 1 et 2, caractérisé par le fait que le piston distributeur est actionné par une pompe hydraulique entraînée par chacune des roues. Device according to claims 1 and 2, characterized in that the distributor piston is actuated by a hydraulic pump driven by each of the wheels. Revendication 4 Claim 4 Dispositif selon revendications 1 et 2, caractérisé par le fait que la pression initiale est dirigée alternativement vers 2 pistons de diamètres différents d'un même étrier de frein. Device according to claims 1 and 2, characterized in that the initial pressure is directed alternately towards 2 pistons of different diameters of the same brake caliper. Revendication 5 Claim 5 Dispositif selon revendications 1, 2 et 4, caractérisé par le fait que l'étrier de frein est "flottant", permettant le contact permanent avec les deux plaquettes de frein et les deux places du disque.  Device according to claims 1, 2 and 4, characterized in that the brake caliper is "floating", allowing permanent contact with the two brake pads and the two places of the disc.
FR8610241A 1986-07-10 1986-07-10 DEVICE AVOIDING THE LOCKING OF THE WHEELS OF A MOTOR VEHICLE DURING BRAKING. Expired FR2601310B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8610241A FR2601310B1 (en) 1986-07-10 1986-07-10 DEVICE AVOIDING THE LOCKING OF THE WHEELS OF A MOTOR VEHICLE DURING BRAKING.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8610241A FR2601310B1 (en) 1986-07-10 1986-07-10 DEVICE AVOIDING THE LOCKING OF THE WHEELS OF A MOTOR VEHICLE DURING BRAKING.

Publications (2)

Publication Number Publication Date
FR2601310A1 true FR2601310A1 (en) 1988-01-15
FR2601310B1 FR2601310B1 (en) 1989-03-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8610241A Expired FR2601310B1 (en) 1986-07-10 1986-07-10 DEVICE AVOIDING THE LOCKING OF THE WHEELS OF A MOTOR VEHICLE DURING BRAKING.

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Country Link
FR (1) FR2601310B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005690A1 (en) * 1989-10-19 1991-05-02 Mario Gigli A self-blocking, hydraulic brake booster
DE4100966A1 (en) * 1991-01-15 1992-07-16 Teves Gmbh Alfred WHEEL BRAKE ASSEMBLY FOR MODULAR BRAKE SYSTEM

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR85797E (en) * 1962-05-11 1965-10-08 Citroen Sa Andre Vehicle wheel slip limiter device during braking
DE2001581A1 (en) * 1969-06-02 1970-12-17 Trw Inc Method and device for programming the wheel braking of a vehicle, and method and device for preventing vehicles from slipping or skidding
US4017126A (en) * 1975-10-28 1977-04-12 Tokico Ltd. Vehicle anti-skid braking device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR85797E (en) * 1962-05-11 1965-10-08 Citroen Sa Andre Vehicle wheel slip limiter device during braking
DE2001581A1 (en) * 1969-06-02 1970-12-17 Trw Inc Method and device for programming the wheel braking of a vehicle, and method and device for preventing vehicles from slipping or skidding
US4017126A (en) * 1975-10-28 1977-04-12 Tokico Ltd. Vehicle anti-skid braking device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005690A1 (en) * 1989-10-19 1991-05-02 Mario Gigli A self-blocking, hydraulic brake booster
DE4100966A1 (en) * 1991-01-15 1992-07-16 Teves Gmbh Alfred WHEEL BRAKE ASSEMBLY FOR MODULAR BRAKE SYSTEM
US5429425A (en) * 1991-01-15 1995-07-04 Alfred Teves Gmbh Wheel brake unit for a modular brake system

Also Published As

Publication number Publication date
FR2601310B1 (en) 1989-03-10

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