FR2491414A1 - Brake for lorry and trailer - has control piston to act on trailer brakes as function of pressure in one lorry brake circuit - Google Patents

Brake for lorry and trailer - has control piston to act on trailer brakes as function of pressure in one lorry brake circuit Download PDF

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Publication number
FR2491414A1
FR2491414A1 FR8118630A FR8118630A FR2491414A1 FR 2491414 A1 FR2491414 A1 FR 2491414A1 FR 8118630 A FR8118630 A FR 8118630A FR 8118630 A FR8118630 A FR 8118630A FR 2491414 A1 FR2491414 A1 FR 2491414A1
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FR
France
Prior art keywords
trailer
control
pressure
brake
circuit
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Granted
Application number
FR8118630A
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French (fr)
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FR2491414B1 (en
Inventor
Hans-Joachim Kraft
Heinz Leiber
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Robert Bosch GmbH
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Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2491414A1 publication Critical patent/FR2491414A1/en
Application granted granted Critical
Publication of FR2491414B1 publication Critical patent/FR2491414B1/en
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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/141—Systems with distributor valve
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • 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
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means
    • 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
    • B60T8/321—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 deceleration
    • B60T8/323—Systems specially adapted for tractor-trailer combinations

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The brake is for a lorry and trailer with braking on each vehicle and that on the trailer is proportional to the force exerted on the lorry. The lorry has a control piston to control pressure on the trailer. There is a brake circuit for front and rear axles and the control piston is influenced by instantaneous pressure in the rear axle circuit. Alternatively, it can be controlled similarly from the other circuit. The control also functions according to axle load.

Description

La présente invention concerne un équipement de freinage de train routier comportant un véhicule tracteur et une remorque, un équipement de freinage sur chaque véhicule et un dispositif agissant sur le frein de la remorque en fonction de la force de freinage instantanée s'exerçant sur le véhicule tracteur. Un tel équipement de freinage est connu (brevet de la République fédérale d'Allemagne nO 1 127 237). The present invention relates to road train braking equipment comprising a towing vehicle and a trailer, braking equipment on each vehicle and a device acting on the trailer brake as a function of the instantaneous braking force exerted on the vehicle. tractor. Such braking equipment is known (patent of the Federal Republic of Germany No. 1,127,237).

Un freinage à fond présente toujours un risque pour la stabilité de marche de tels trains routiers. Il en est ainsi tant pour une voiture de tourisme avec une remorque, et notamment une caravane, que pour un camion et sa remorque.  Full braking always presents a risk to the running stability of such road trains. This is so both for a passenger car with a trailer, and in particular a caravan, as for a truck and its trailer.

L'expérience a montré que le chargement et le réglage des freins d'un train routier non équipé d'un dispositif antiblocage doivent etre adaptés de façon que l'essieu avant se bloque en premier lors du freinage, afin que le train routier demeure en ligne et que le conducteur perçoive le dépassement de la limite de blocage sur le volant. Experience has shown that the loading and adjustment of the brakes of a road train not fitted with an anti-lock device must be adapted so that the front axle first locks when braking, so that the road train remains in line and that the driver perceives the exceeding of the blocking limit on the steering wheel.

L'augmentation de la pression de freinage doit ensuite bloquer l'essieu arrière du véhicule tracteur, puis la remorque.The increase in brake pressure must then lock the rear axle of the towing vehicle, then the trailer.

Lorsqu'un train routier est équipé d'un dispositif antiblocage, un tel systeme n'est généralement installé qxe sur le véhicule tracteur pour des raisons économiques. Dans le cas d'un train routier ainsi équipé, il peut arriver que les roues de la remorque se bloquent. When a road train is fitted with an anti-lock device, such a system is generally only installed on the towing vehicle for economic reasons. In the case of a road train so equipped, it may happen that the trailer wheels lock up.

Cela est toutefois dangereux dans diverses situations, telles que le freinage dans un virage.This is however dangerous in various situations, such as braking in a corner.

Selon une caractéristique essentielle de l'invention, le véhicule tracteur comporte des moyens de commande (piston de commande) qui permettent d'adapter la pression de freinage de la remorque à la pression de freinage du véhicule tracteur, surveillée par le dispositif antiblocage (appareil de commande). Un équipement de freinage de train routier selon l'invention présente les avantages suivants : la stabilité de marche du train routier est garantie; la remorque est stabilisée; et les coûts necessaires sont maintenus dans des limites raisonnables. Selon une autre caractéristique de l'invention, des moyens simples permettent de brancher d'autres grandeurs auxiliaires pour influencer la pression de freinage de la remorque.  According to an essential characteristic of the invention, the towing vehicle comprises control means (control piston) which make it possible to adapt the braking pressure of the trailer to the braking pressure of the towing vehicle, monitored by the anti-lock device (device control). Road train braking equipment according to the invention has the following advantages: the running stability of the road train is guaranteed; the trailer is stabilized; and the necessary costs are kept within reasonable limits. According to another characteristic of the invention, simple means make it possible to connect other auxiliary quantities to influence the braking pressure of the trailer.

D'autres caracteristiques et avantages de l'invention seront mieux compris a l'aide de la description détaillée ci-dessous de deux exemples de réalisation et du dessin annexé sur lequel la figure 1 représente un systeme de freinage avec un distributeur de commande de remorque à circuit unique; et la figure 2 représente un distributeur de commande de remorque à deux circuits. Other characteristics and advantages of the invention will be better understood with the aid of the detailed description below of two exemplary embodiments and of the appended drawing in which FIG. 1 represents a braking system with a trailer control distributor. single circuit; and Figure 2 shows a two-circuit trailer control distributor.

Un équipement de freinage de véhicule tracteur comporte un amplificateur de freinage 1, auquel est affecté un générateur de fluide sous pression (pompe 2 et accumulateur 3). Le fluide revenant sans pression est recueilli dans un réservoir 4. A braking equipment for a towing vehicle comprises a braking amplifier 1, to which a generator of pressurized fluid is assigned (pump 2 and accumulator 3). The fluid returning without pressure is collected in a tank 4.

La force exercée par le pied du conducteur sur la pédale de frein 5 est transmise à l'amplificateur de freinage 1, d'où partent deux canalisations de freinage 6 et 7, affectées chacune à un circuit de freinage I ou Il. Les deux canalisations de freinage 6 et 7 aboutissent à un appareil de commande antiblocage 8, qui surveille leur débit avec protection antiblocage. Pour ce faire, l'appareil de commande 8 traite de façon connue des signaux délivrés par des capteurs non représentes, montés sur les roues du véhicule. The force exerted by the driver's foot on the brake pedal 5 is transmitted to the braking amplifier 1, from which two brake lines 6 and 7 start, each assigned to a braking circuit I or II. The two brake lines 6 and 7 lead to an anti-lock control device 8, which monitors their flow with anti-lock protection. To do this, the control device 8 processes in a known manner signals delivered by sensors not shown, mounted on the wheels of the vehicle.

Quatre canalisations de freinage 9, 10, 11, 12 relient chacune l'appareil de commande 8 à un frein de roue du véhicule. L'exemple de réalisation représenté est celui d'un système à répartition en diagonale des circuits de freinage, avec alimentation de 1' essieu arrière par les deux circuits de freinage. Une autre répartition des circuits de freinage et une Influence par le circuit I de freinage de l'essieu avant sont toutefois également possibles. Une des canalisations de freinage 9, 10, 11, 12 (la canalisation 12 dans l'exemple de réalisation représenté) est reliée par une canalisation en dérivation 13 a un distributeur de commande de remorque 14 connu. Four brake lines 9, 10, 11, 12 each connect the control unit 8 to a vehicle wheel brake. The exemplary embodiment shown is that of a system with a diagonal distribution of the braking circuits, with the rear axle being supplied by the two braking circuits. A different distribution of the brake circuits and an influence by the brake circuit I of the front axle are however also possible. One of the brake lines 9, 10, 11, 12 (the line 12 in the embodiment shown) is connected by a branch line 13 to a known trailer control distributor 14.

Le distributeur de commande de remorque 14 comporte une chambre de commande 15, a laquelle est reliée la canalisation en dérivation 13 et qui est limitée par un piston de commande 16, faisant partie d'un distributeur de commande 17 et d'un distributeur à tiroir 18. Pour des raisons de sécurité, le distributeur a tiroir 18 ne surveille pas une liaison sous la pression de l'accumulateur, mais une canalisation sous pression 19, passant par l'amplificateur de freinage 1 et qu'il connecte à une canalisation 20 de freinage de la remorque ou - sur sa seconde position (représentée) - verrouille en déchargeant la canalisation 20 de freinage de la remorque sur une canalisation de retour 21.L'application de la pression de l'amplificateur par la canalisation 19 évite que la pression totale de l'accumulateur atteigne la remorque en cas de défaut dans le distributeur de commande 14 de la remorque. The trailer control distributor 14 comprises a control chamber 15, to which the branch pipe 13 is connected and which is limited by a control piston 16, forming part of a control distributor 17 and a drawer distributor 18. For safety reasons, the spool valve 18 does not monitor a connection under the pressure of the accumulator, but a pressure line 19, passing through the braking amplifier 1 and which it connects to a line 20 trailer braking or - in its second position (shown) - locks by unloading the trailer braking line 20 on a return line 21. The application of the pressure of the amplifier by the line 19 prevents the total pressure of the accumulator reaches the trailer in the event of a fault in the control valve 14 of the trailer.

Le distributeur 14 de commande de commande de la remorque étant influencé par la pression du circuit de freinage II, la pression de freinage de la remorque est, lors du freinage, réglée en fonction de la pression de freinage sur l'essieu arrière du véhicule tracteur, surveillée par l'appareil de commande antiblocage 8. Il en résulte l'avantage suivant : un pourcentage elevé des opérations de freinage est assuré par l'équipement selon l'invention, moyennant une adaptation appropriee du frein de la remorque. En d'autres termes, un blocage des roues de la remorque est interdit. Il s'y ajoute l'avantage d'un appareillage réduit, qui est évident. The trailer control control distributor 14 being influenced by the pressure of the braking circuit II, the braking pressure of the trailer is, when braking, adjusted as a function of the braking pressure on the rear axle of the towing vehicle , monitored by the anti-lock control device 8. This results in the following advantage: a high percentage of braking operations is ensured by the equipment according to the invention, with an appropriate adaptation of the trailer brake. In other words, locking of the trailer wheels is prohibited. Added to this is the advantage of reduced equipment, which is obvious.

Le distributeur 14 de commande de la remorque ne comr,lute plus en cas de défaillance du circuit de freinage II. Un tel defaut est supprimé par un modèle de distributeur de commande de la remorque du type représente à la figure 2. Ce distributeur 22 de commande de la remorque comprend un piston de commande 23 supplémentaire, une chambre de commande 24 supplementaire et une canalisation en dérivation 25 supplémentaire, assurant la liaison avec le circuit de freinage I. The trailer control distributor 14 will no longer operate in the event of a brake circuit II failure. Such a defect is eliminated by a model of the trailer control distributor of the type shown in FIG. 2. This trailer control distributor 22 comprises an additional control piston 23, an additional control chamber 24 and a branch pipe. 25 additional, ensuring the connection with the braking circuit I.

En cas de défaillance d'un circuit de freinage (I) et (II), ia pression du circuit de freinage intact peut encore actionner le distributeur 22 de commande de la remorque. Il convient de noter encore que les deux pistons de commande 16 et 23, constituant les moyens de commande, peuvent également etre influencés par des signaux auxiliaires supplémentaires, tels que la décélération du véhicule. In the event of failure of a braking circuit (I) and (II), the pressure of the intact braking circuit can still actuate the distributor 22 for controlling the trailer. It should also be noted that the two control pistons 16 and 23, constituting the control means, can also be influenced by additional auxiliary signals, such as the deceleration of the vehicle.

Le distributeur représenté 14 ou 22 de commande de la remorque peut être intégre avec l'appareil de commande 8 du dispositif antiblocage dans un appareil 26 commun, de façon à donner une unité constructive particulièrement compacte.  The distributor shown 14 or 22 for controlling the trailer can be integrated with the control device 8 of the anti-lock device in a common device 26, so as to give a particularly compact construction unit.

Bien entendu, diverses modifications peuvent être apportées par l'homme de l'art au principe et aux dispositifs qui viennent d'être décrits uniquement à titre d'exemples non limitatifs, sans sortir du cadre de l'invention.  Of course, various modifications can be made by those skilled in the art to the principle and to the devices which have just been described only by way of nonlimiting examples, without departing from the scope of the invention.

Claims (8)

RevendicationsClaims 1. Equipement de freinage de train routier. comportant un véhicule tracteur et une remorque, un équipement de freinage sur chaque véhicule et un dispositif agissant sur le frein de la remorque en fonction de la force de freinage instantanée s'exerçant sur le véhicule tracteur, ledit équipement étant caractérisé en ce que le véhicule tracteur comporte des moyens de commande (piston de commande 16, 23) qui permettent d'adapter la pression de freinage de la remorque à la pression de freinage du véhicule tracteur, surveillée par le dispositif antiblocage (appareil de commande 8).1. Road train braking equipment. comprising a towing vehicle and a trailer, braking equipment on each vehicle and a device acting on the trailer brake as a function of the instantaneous braking force exerted on the towing vehicle, said equipment being characterized in that the vehicle tractor has control means (control piston 16, 23) which make it possible to adapt the brake pressure of the trailer to the brake pressure of the tractor vehicle, monitored by the anti-lock device (control device 8). 2. Equipement de freinage de train routier selon revendication 1, comportant un circuit de freinage (I, II) de chacun des essieux avant et arrière, et caractérisé en ce que les moyens de commande (piston de commande 16) sont influencés par la pression instantanée dans le circuit de freinage (II) de l'essieu arrière.2. Road train braking equipment according to claim 1, comprising a braking circuit (I, II) of each of the front and rear axles, and characterized in that the control means (control piston 16) are influenced by the pressure instant in the brake system (II) of the rear axle. 3. Equipement de freinage de train. routier selon revendication 1, comportant un circuit de freinage pour chacun des essieux avant et arrière, et caractérisé en ce que les moyens de commande (piston de commande 16) sont influencés par la pression instantanee dans le circuit de freinage (I) de l'essieu avant.3. Train braking equipment. road according to claim 1, comprising a braking circuit for each of the front and rear axles, and characterized in that the control means (control piston 16) are influenced by the instantaneous pressure in the braking circuit (I) of the front axle. 4. Equipement de freinage de train routier selon revendication 1, comportant un circuit de freinage pour chacun des essieux avant et arrière, et caractérisé en ce que les moyens de commande (piston de commande 16, 23) sont attaqués par deux circuits et, en cas de défaillance d'un circuit (I, II) peuvent être actionnés par la seule pression du circuit demeuré intact.4. Road train braking equipment according to claim 1, comprising a braking circuit for each of the front and rear axles, and characterized in that the control means (control piston 16, 23) are attacked by two circuits and, in in the event of a circuit failure (I, II) can be actuated by the single pressure of the circuit which remains intact. 5. Equipement de freinage de train routier selon une des revendications 1 et 2, caractérisé en ce que les moyens de commande (piston de commande 16) influencés par la pression du circuit de freinage (II) de l'essieu arrière sont dimensionnés en fonction d'une pression de blocage fonction de la charge d'essieu.5. Road train braking equipment according to one of claims 1 and 2, characterized in that the control means (control piston 16) influenced by the pressure of the brake circuit (II) of the rear axle are dimensioned as a function a blocking pressure depending on the axle load. 6. Equipement de freinage de train routier selon une quelconque des revendications 1 à 5, caractérisé en ce que.. les moyens de commande sont influencés par des signaux auxiliaires supplementaires, tels que la décélération du véhicule. 6. Road train braking equipment according to any one of claims 1 to 5, characterized in that .. the control means are influenced by additional auxiliary signals, such as the deceleration of the vehicle. 7. Equipement de freinage de train routier selon une quelconque des revendications 1 à 6, caractérisé par l'intégration des moyens de commande dans un distributeur de commande de remorque (14, 22).7. Road train braking equipment according to any one of claims 1 to 6, characterized by the integration of the control means in a trailer control distributor (14, 22). 8. Equipement de freinage de train routier selon revendication 7, caracterise par l'intégration du dispositif antiblocage (appareil de commande 8) et du distributeur de commande de la remorque (14, 2 2) dans un appareil commun. 8. Road train braking equipment according to claim 7, characterized by the integration of the anti-lock device (control device 8) and the trailer control distributor (14, 2 2) in a common device.
FR8118630A 1980-10-02 1981-10-02 ROAD TRAIN BRAKING EQUIPMENT Expired FR2491414B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803037229 DE3037229A1 (en) 1980-10-02 1980-10-02 CAR TRAIN BRAKING DEVICE

Publications (2)

Publication Number Publication Date
FR2491414A1 true FR2491414A1 (en) 1982-04-09
FR2491414B1 FR2491414B1 (en) 1985-07-26

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Application Number Title Priority Date Filing Date
FR8118630A Expired FR2491414B1 (en) 1980-10-02 1981-10-02 ROAD TRAIN BRAKING EQUIPMENT

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DE (1) DE3037229A1 (en)
FR (1) FR2491414B1 (en)
SE (1) SE450363B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130848C1 (en) * 1991-09-17 1993-03-18 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109968A (en) * 1977-07-28 1978-08-29 Rollin L. Wood Tractor-trailer brake system with improved means for assuring application of trailer brakes concomitantly with tractor brakes
US4231442A (en) * 1974-06-15 1980-11-04 Mogens Birkeholm Apparatus for braking a train of vehicles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2241704A1 (en) * 1972-08-24 1974-02-28 Westinghouse Bremsen Apparate COMPRESSED BRAKE SYSTEM FOR MOTOR VEHICLES

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231442A (en) * 1974-06-15 1980-11-04 Mogens Birkeholm Apparatus for braking a train of vehicles
US4109968A (en) * 1977-07-28 1978-08-29 Rollin L. Wood Tractor-trailer brake system with improved means for assuring application of trailer brakes concomitantly with tractor brakes

Also Published As

Publication number Publication date
DE3037229A1 (en) 1982-10-21
SE450363B (en) 1987-06-22
SE8105798L (en) 1982-04-03
FR2491414B1 (en) 1985-07-26

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