FR2564794A1 - BRAKE PRESSURE ADJUSTMENT SYSTEM FOR PREVENTING WHEEL LOCKING WHEN BRAKING A MOTOR VEHICLE - Google Patents
BRAKE PRESSURE ADJUSTMENT SYSTEM FOR PREVENTING WHEEL LOCKING WHEN BRAKING A MOTOR VEHICLE Download PDFInfo
- Publication number
- FR2564794A1 FR2564794A1 FR8507854A FR8507854A FR2564794A1 FR 2564794 A1 FR2564794 A1 FR 2564794A1 FR 8507854 A FR8507854 A FR 8507854A FR 8507854 A FR8507854 A FR 8507854A FR 2564794 A1 FR2564794 A1 FR 2564794A1
- Authority
- FR
- France
- Prior art keywords
- pressure
- braking
- valve
- brake
- wheels
- 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
- 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
- B60T8/343—Systems characterised by their lay-out
- B60T8/344—Hydraulic systems
-
- 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
- B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/92—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action
- B60T8/96—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action on speed responsive control means
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
CE SYSTEME EST CAPABLE DE REGLER LA PRESSION SEPAREMENT SUR TOUTES LES ROUES 1, 2 D'UN VEHICULE ET D'ARRETER LA REGULATION EN CAS DE DEFAILLANCE DU REGULATEUR. DANS CE CAS, L'ELECTROVANNE 3 DE REGLAGE DE PRESSION POUR L'UNE DES ROUES ARRIERE 1 DU VEHICULE EST AMENEE A UNE POSITION 1 OU LE CYLINDRE DE FREIN DE CETTE ROUE ARRIERE NE PEUT PAS RECEVOIR DE PRESSION DE FREINAGE.THIS SYSTEM IS CAPABLE OF ADJUSTING PRESSURE SEPARATELY ON ALL WHEELS 1, 2 OF A VEHICLE AND STOPPING REGULATION IF THE REGULATOR FAILS. IN THIS CASE, THE PRESSURE ADJUSTMENT SOLENOID VALVE 3 FOR ONE OF THE REAR WHEELS 1 OF THE VEHICLE IS TAKEN TO A POSITION 1 OR THE BRAKE CYLINDER OF THIS REAR WHEEL CANNOT RECEIVE BRAKING PRESSURE.
Description
L'invention concerne un système de régLage antiblocage pour des roues d'unThe invention relates to an anti-lock adjustment system for wheels of a
véhicule automobile, comprenant des capteurs pour détecter le comportement en rotation de roues du véhicule, un montage d'exploitation pour exploiter les signaux fournis par les capteurs et pour engendrer des signaux de réglage de la pression de freinage, des soupapes ou des organes analogues conjugués aux différentes roues et auxquelles sont appliqués ces signaux de réglage en vue de la variation de la pression de freinage, ainsi qu'un dispositif de surveillance qui arrête le motor vehicle, comprising sensors for detecting the rotation behavior of vehicle wheels, an operating assembly for exploiting the signals supplied by the sensors and for generating signals for adjusting the brake pressure, valves or the like to the different wheels and to which these adjustment signals are applied with a view to varying the braking pressure, as well as a monitoring device which stops the
système de réglage antiblocage en cas de dérangement. anti-lock adjustment system in the event of a fault.
Un tel système est connu, par exemple par la demande Such a system is known, for example by request
de brevet allemand DE-OS 31 26 102.German patent DE-OS 31 26 102.
Les systèmes de réglage antiblocage actuellement Anti-lock adjustment systems currently
connus arrêtent la fonction antiblocage en cas de dérangement. known stop the anti-lock function in the event of a fault.
C'est le système de freinage normal qui agit dans ce cas. En raison de la tenue de route nécessaire s'il se produit un dérangement, de nombreux véhicules, en particulier ceux qui sont à traction avant, sont équipés d'un réducteur de pression de freinage pour l'essieu arrière. Etant donné que, au cas o le système antiblocage est arrêté, les roues de l'essieu avant deviennent instables avant les roues de l'essieu arrière, le conducteur n'augmente généralement pas la pression de freinage s'il se produit un blocage sur l'essieu avant, de sorte que les roues de l'essieu arrière, qui ne sont pas bloquées, assurent alors la tenue de route. En beaucoup de paysp The normal braking system acts in this case. Due to the handling requirements in the event of a fault, many vehicles, especially those with front-wheel drive, are fitted with a brake pressure reducer for the rear axle. Since, in the event that the anti-lock system is switched off, the wheels of the front axle become unstable before the wheels of the rear axle, the driver does not generally increase the braking pressure if a blockage occurs the front axle, so that the wheels of the rear axle, which are not locked, then provide road holding. In many countries
le législateur a prescrit que les freins soient conçus en consé- legislators have prescribed that brakes be designed
quence. L'invention vise à éviter les inconvénients de cet quence. The invention aims to avoid the drawbacks of this
état de la technique.state of the art.
Selon l'invention, un système de réglage comme défini ci-dessus est caractérisé en ce que la soupape conjuguée à l'une des roues arrière et/ou le montage d'exploitation est ou sont conçu(s) de manière que cette roue arrière ne puisse pas recevoir de pression de freinage lorsque le système de réglage According to the invention, an adjustment system as defined above is characterized in that the valve combined with one of the rear wheels and / or the operating assembly is or are designed so that this rear wheel cannot receive brake pressure when the adjustment system
antiblocage est arrêté.anti-lock is stopped.
L'utilisation selon l'invention d'une roue arrière The use according to the invention of a rear wheel
non freinée, ce qui est réalisé par exemple par une soupape anti- unbraked, which is achieved, for example, by a check valve
blocage fermée en l'absence de courant dans un circuit d'essieu arrière, les circuits de freinage étant de préférence à répartition diagonale, empêche, en cas de dérangement du régulateur anti- blocage, que la roue arrière reçoit une pression de freinage. Le blocage de cette roue est par conséquent exclu. Dans le cas d'une répartition diagonale des circuits de freinage, c'est-à-dire lorsque chacun des circuits de freinage alimente des cylindres de frein de roue disposés en diagonale sur le véhicule, ce qui est une disposition qui est particulièrement avantageuse pour la mise en oeuvre de Locking closed in the absence of current in a rear axle circuit, the braking circuits preferably being diagonally distributed, prevents the rear wheel from receiving brake pressure in the event of an anti-lockout regulator fault. The blocking of this wheel is therefore excluded. In the case of a diagonal distribution of the braking circuits, that is to say when each of the braking circuits supplies wheel brake cylinders arranged diagonally on the vehicle, which is an arrangement which is particularly advantageous for the implementation of
l'invention, une roue arrière ne freine donc pas en cas de déran- the invention, a rear wheel therefore does not brake in the event of
gement, ce qui se traduit par une faible réduction de L'action de freinage au profit de la tenue de route. Compte tenue de la grande sûreté des systèmes antiblocage, cette réduction du freinage est admissible. D'ailleurs, on produit depuis longtemps déjà des véhicules avec une répartition des circuits de freinage dans laquelle chacun des circuits agit sur deux roues avant et une roue arrière et avec laquelle on obtient également le même effet de gement, which results in a small reduction in the braking action in favor of handling. Given the great safety of anti-lock systems, this reduction in braking is admissible. Besides, vehicles have long been produced with a distribution of the braking circuits in which each of the circuits acts on two front wheels and one rear wheel and with which the same effect is also obtained.
freinage en cas de dérangement.braking in the event of a fault.
Selon le mode de réalisation préféré de L'invention, la soupape ou l'organe analogue pour la roue arrière mentionnée, il s'agit en particulier d'une électrovanne, est enclenchée à travers le montage d'exploitation, de sorte qu'elle reste excitée pendant toute la durée de marche, ou seulement pendant le freinage, de sorte que le véhicule dispose de toute sa capacité de freinage. Une telle commande de la soupape pour la roue arrière mentionnée permet de supprimer le réducteur de pressionpour l'essieu arrière; ceci représente un avantage considérable, surtout lorsqu'it s'agit de véhicules avec une répartition diagonale des circuits de freinage According to the preferred embodiment of the invention, the valve or the like for the rear wheel mentioned, in particular it is a solenoid valve, is engaged through the operating assembly, so that it remains energized during the whole driving time, or only during braking, so that the vehicle has its full braking capacity. Such a valve control for the aforementioned rear wheel eliminates the pressure reducer for the rear axle; this is a considerable advantage, especially when it comes to vehicles with a diagonal distribution of the braking circuits
et avec deux réducteurs de pression. and with two pressure reducers.
D'autres caractéristiques et avantages de l'invention Other characteristics and advantages of the invention
ressortiront plus clairement de la description qui va suivre d'un will emerge more clearly from the following description of a
exemple de réalisation non limitatif, ainsi que du dessin annexé, sur lequel: - la figure 1 représente schématiquement un mode de réalisation de l'invention; et - la figure 2 représente une variante pour la soupape non-limiting example of embodiment, as well as of the appended drawing, in which: - Figure 1 schematically represents an embodiment of the invention; and - Figure 2 shows a variant for the valve
de la roue arrière non freinée en cas de dérangement. of the rear wheel not braked in the event of a fault.
La figure I représente les deux roues 1, 2 d'un essieu arrière aux cylindres de frein desquelles sont raccordés deux circuits de freinage I et II. Les canalisations de frein menant aux roues 1 et 2 contiennent des électrovannes 3 et 4 à trois positions. Le circuit de frein II contient une électrovanne habituelle qui laisse passer le fluide de freinage en l'absence Figure I shows the two wheels 1, 2 of a rear axle to the brake cylinders of which are connected two braking circuits I and II. The brake lines leading to wheels 1 and 2 contain three-position solenoid valves 3 and 4. The brake circuit II contains a usual solenoid valve which lets the brake fluid through in the absence
de courant, c'est-à-dire lorsqu'elle n'est pas excitée électriquement. current, that is to say when it is not electrically excited.
Par contre, l'électrovanne 3 comprise dans le circuit de frein I estfermée en l'absence de courant. L'orifice de raccordement de l'électrovanne menant au cylindre de frein de roue RZ communique alors avec un retour R dans lequel ne règne pas de pression. La deuxième position de l'électrovanne 3 sert au maintien d'une pression On the other hand, the solenoid valve 3 included in the brake circuit I is closed in the absence of current. The connection port of the solenoid valve leading to the wheel brake cylinder RZ then communicates with a return R in which there is no pressure. The second position of the solenoid valve 3 is used to maintain a pressure
constante dans le frein de roue. La troisième position de l'électro- constant in the wheel brake. The third position of electro-
vanne établit le libre passage du fluide depuis le maître-cylindre 5 jusqu'au cylindre de frein de roue, le retour étant fermé. Cette électrovanne 3 est commandée par un montage d'exploitation (appareil de commande) 4 et est excitée pendant la marche normale. Pour réduire la consommation de courant électrique, l'enclenchement de l'électrovanne à la troisième position - en l'absence de fonction antiblocage - est réalisable également à travers l'interrupteur d'éclairage stop BS. Lors du fonctionnement du système antiblocage, les électrovannes sont commutées entre leurs positions 1 à 3 en vue de la réduction de la pression, de l'établissement de la pression et du maintien de la pression à une valeur constante. En cas d'arrêt du système antiblocage, les électrovannes 3 et 4 prennent la position 1, o la roue 2 peut être freinée, mais la roue 1 ne peut valve establishes the free passage of the fluid from the master cylinder 5 to the wheel brake cylinder, the return being closed. This solenoid valve 3 is controlled by an operating assembly (control device) 4 and is energized during normal operation. To reduce the consumption of electric current, the solenoid valve can be switched on in the third position - in the absence of an anti-blocking function - by means of the stop light switch BS. During the operation of the anti-lock system, the solenoid valves are switched between their positions 1 to 3 in order to reduce the pressure, build up the pressure and maintain the pressure at a constant value. If the anti-lock system stops, the solenoid valves 3 and 4 assume position 1, where wheel 2 can be braked, but wheel 1 cannot
pas être freinée.not be braked.
La figure 2 représente, à la placé de l'électrovanne 3 à trois positions, une configuration formée de deux électrovannes 6 et 7 à deux positions, qui correspondent également à l'état de la technique. Dans cette configuration, l'électrovanne 7 est normalement enclenchée par Le montage d'exploitation 4 (position 2). En cas de dérangement, la liaison entre Le maitre-cyLindre de frein 5 et le cylindre de frein de la roue 1 est coupée (position 1). Le cylindre de frein de roue est alors relié au retour R. La fonction antiblocage est réalisée par l'excitation combinée des deux éLectrovannes 6 et 7: électrovanne position n Etablissement de la pression 6 1 FIG. 2 represents, at the position of the three-position solenoid valve 3, a configuration formed by two two-position solenoid valves 6 and 7, which also correspond to the state of the art. In this configuration, the solenoid valve 7 is normally engaged by the operating assembly 4 (position 2). In the event of a fault, the connection between the brake master cylinder 5 and the brake cylinder of wheel 1 is cut (position 1). The wheel brake cylinder is then connected to the return R. The anti-lock function is achieved by the combined excitation of the two solenoid valves 6 and 7: solenoid valve position n Pressure build-up 6 1
? 2? 2
Maintien constant 6 2Constant hold 6 2
7 27 2
Réduction de la pression 6 I ou 2Pressure reduction 6 I or 2
7 17 1
Les roues avant, inutiles pour l'explication de l'invention, de même que leurs capteurs et dispositifs de réglage de la pression de freinage, ne sont pas représentés sur le dessin The front wheels, unnecessary for the explanation of the invention, as well as their braking pressure sensors and adjustment devices, are not shown in the drawing
pour simplifier.to simplify.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843419717 DE3419717A1 (en) | 1984-05-26 | 1984-05-26 | ANTI-BLOCKING CONTROL SYSTEM |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2564794A1 true FR2564794A1 (en) | 1985-11-29 |
FR2564794B1 FR2564794B1 (en) | 1989-01-20 |
Family
ID=6236938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8507854A Expired FR2564794B1 (en) | 1984-05-26 | 1985-05-24 | BRAKE PRESSURE ADJUSTMENT SYSTEM FOR PREVENTING WHEEL LOCKING WHEN BRAKING A MOTOR VEHICLE |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE3419717A1 (en) |
FR (1) | FR2564794B1 (en) |
GB (1) | GB2159222B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4240493A1 (en) * | 1992-12-02 | 1994-06-09 | Teves Gmbh Alfred | Brake system with ABS and EBV |
DE4330121B4 (en) * | 1993-09-06 | 2005-06-09 | Bayerische Motoren Werke Ag | Anti-lock control system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1598328A (en) * | 1967-12-08 | 1970-07-06 | ||
DE2918772A1 (en) * | 1979-05-10 | 1980-11-20 | Bosch Gmbh Robert | MULTI-CIRCLE PRESSURE BRAKE SYSTEM |
DE3126102A1 (en) * | 1981-07-02 | 1983-01-20 | Robert Bosch Gmbh, 7000 Stuttgart | ANTI-BLOCKING CONTROL SYSTEM |
DE3150218A1 (en) * | 1981-12-18 | 1983-07-21 | Alfred Teves Gmbh, 6000 Frankfurt | HYDRAULIC MULTI-CIRCUIT BRAKE SYSTEM |
DE3247496A1 (en) * | 1982-12-22 | 1984-06-28 | Alfred Teves Gmbh, 6000 Frankfurt | HYDRAULIC TWO-CIRCUIT BRAKE SYSTEM |
-
1984
- 1984-05-26 DE DE19843419717 patent/DE3419717A1/en active Granted
-
1985
- 1985-04-26 GB GB08510658A patent/GB2159222B/en not_active Expired
- 1985-05-24 FR FR8507854A patent/FR2564794B1/en not_active Expired
Non-Patent Citations (2)
Title |
---|
AUTOMOTIVE ENGINEERING, vol. 91, no. 3, mars 1983, pages 60-62, Dallas, Texas, US; J. YAMAGUCHI: "Honda offers four-wheel anti-skid brakes" * |
BOSCH TECHNISCHE BERICHTE, vol. 7, no. 2, 1980, pages 65-94, Stuttgart, DE; H. LEIBER: "Antiblockiersystem (ABS) f}r Personenkraftwagen" * |
Also Published As
Publication number | Publication date |
---|---|
FR2564794B1 (en) | 1989-01-20 |
DE3419717A1 (en) | 1985-11-28 |
GB2159222A (en) | 1985-11-27 |
GB2159222B (en) | 1987-08-19 |
DE3419717C2 (en) | 1993-02-11 |
GB8510658D0 (en) | 1985-06-05 |
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