DE2345860A1 - Hydraulic brake system with leak detector - monitors reservoir fluid level and pressure and shuts off respective brakes - Google Patents
Hydraulic brake system with leak detector - monitors reservoir fluid level and pressure and shuts off respective brakesInfo
- Publication number
- DE2345860A1 DE2345860A1 DE19732345860 DE2345860A DE2345860A1 DE 2345860 A1 DE2345860 A1 DE 2345860A1 DE 19732345860 DE19732345860 DE 19732345860 DE 2345860 A DE2345860 A DE 2345860A DE 2345860 A1 DE2345860 A1 DE 2345860A1
- Authority
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- Germany
- Prior art keywords
- signal
- shut
- brake system
- hydraulic brake
- valves
- 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.)
- Pending
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Classifications
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- 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
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- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/28—Valves specially adapted therefor
- B60T11/32—Automatic cut-off valves for defective pipes
- B60T11/323—Automatic cut-off valves for defective pipes in 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
- 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
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- 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
- 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
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- 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
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
- B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
- B60T8/17613—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure based on analogue circuits or digital circuits comprised of discrete electronic elements
-
- 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
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
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- 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
- B60T8/885—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 using electrical circuitry
-
- 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
- B60T8/94—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 a fluid pressure regulator
-
- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/403—Brake circuit failure
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
6900 Heidelberg 1
Grenzhöfer Weg J66900 Heidelberg 1
Grenzhöfer Weg J6
Heidelberg, 20. August 1973 G/Pt-Sch/Ba E-301Heidelberg, August 20, 1973 G / Pt-Sch / Ba E-301
Hydraulisches BremssystemHydraulic braking system
(Zusatz zu Patentanmeldung P 20 46 802.4)(Addition to patent application P 20 46 802.4)
Die vorliegende Erfindung betrifft ein hydraulisches Bremssystem mit Antiblockierregler, insbesondere nachThe present invention relates to a hydraulic brake system with an anti-lock regulator, in particular according to
Patent (Patentanmeldung P 20 46 802.4),Patent (patent application P 20 46 802.4),
bei dem in den Leitungen, welche eine Druckquelle mit den Eadbr ems zylindern verbinden, vom Antiblockierregler gesteuerte Absperrventile eingeschaltet sind und bei dem Volumenwächter vorgesehen sind.in the case of the anti-lock regulator in the lines that connect a pressure source to the Eadbr ems cylinders controlled shut-off valves are switched on and are provided for the volume monitor.
Gegenstand des Hauptpatentes ist ein hydraulisches Bremssystem mit Antiblockierregler, bei welchem jedem Absperrventil ein Volumenwächter zugeordnet ist, der das Volumen des zum jeweiligen Radbremszylinder fliessenden Druckmittels erfaßt und bei überschreiten eines "bestimmten Ansprechvolumens ein elektrisches Signal abgibt, welches das Absperrventil bevorzugt geschlossen hält und ein Warnsignal auslöst. Damit wird erreicht,The subject of the main patent is a hydraulic brake system with anti-lock control, in which each A shut-off valve is assigned a volume monitor that controls the volume of the fluid flowing to the respective wheel brake cylinder Detects pressure medium and an electrical signal when a "certain response volume is exceeded releases, which preferably keeps the shut-off valve closed and triggers a warning signal. This achieves
509813/0507509813/0507
daß bei Undichtwerden einer Bremsleitung oder bei einem Defekt in einem Radbremszylinder dennoch eine hohe Restbremswirkung beibehalten wird. Es wird weiterhin erreicht, daß in einem derartigen Falle der Volumenverlust stark begrenzt wird, so daß bei Bremssystemen mit mehreren Bremskreisen das sogenannte "Durchfallen" des Bremspedales weitgehend vermieden wird. In einer bevorzugten Ausbildung des Hauptpatentes besteht der genannte Volumenwächter aus einem Zylinder,welcher durch einen beweglichen Kolben in zwei Kammern geteilt ist, die mit dem Absperrventil bzw. den Radbremszylindern verbunden sind, wobei der Kolben in einer bestimmten Schaltstellung einen elektrischen Kontakt betätigt, welcher vorzugsweise als Reed-Kontakt ausgebildet ist und mittels eines am genannten Kolben angeordneten Permanentmagneten betätigbar ist.that if a brake line leaks or if there is a defect in a wheel brake cylinder, a high residual braking effect is maintained. It is further achieved that in such a case the loss of volume is severely limited, so that in brake systems with several brake circuits the so-called "failing" the brake pedal is largely avoided. In a preferred embodiment of the main patent, there is the called volume monitor consisting of a cylinder, which is divided into two chambers by a movable piston which are connected to the shut-off valve or the wheel brake cylinders, the piston in a certain Switching position actuates an electrical contact, which is preferably designed as a reed contact and by means of a permanent magnet arranged on said piston is actuatable.
Es sind weiterhin Bremssysteme bekannt, bei denen zur Bremsdruckerzeugung eine Pumpe vorgesehen ist, welcher eine Speicherkammer zugeordnet ist. Zur Einsteuerung des Bremsdruckes in die Radbremszylinder sind Steuerventile vorgesehen, welche mittels Signalen entsprechend der Stellung des Bremspedales der Pedalkraft sowie der jeweiligen Fahrzeugverzögerung derart angesteuert werden, daß bei einem bestimmten Maße der Bremspedalbetätigung auch eine bestimmte Fahrzeugverzögerung zustandekommt. Zwischen den genannten Steuerventilen und Radbremszylindern sind weiterhin Ventilanordnungen vorgesehen, welche mittels Signalen eines Antiblockierreglers ansteuerbar sind und die Druckzufuhr zu den Radbremszylindern gegebenenfalls absperren.There are also known brake systems in which a pump is provided for generating brake pressure, which a storage chamber is assigned. To control the brake pressure in the wheel brake cylinder, control valves are provided, which by means of signals accordingly the position of the brake pedal, the pedal force and the respective vehicle deceleration are controlled in such a way that with a certain amount of brake pedal actuation, a certain vehicle deceleration also comes about. Valve arrangements are also provided between the aforementioned control valves and wheel brake cylinders, which can be controlled by means of signals from an anti-lock regulator and the pressure supply to the wheel brake cylinders shut off if necessary.
509813/0507509813/0507
E-301 / 6 E-301/ 6
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, in einem derartigen Bremssystem das Hauptpatent anzuwenden und zwar ohne wesentliche konstruktive Änderungen und mit einem minimalen zusätzlichen Aufwand. Diese Aufgabe wird gemäß den Merkmalen des ersten Patentanspruches gelöst.The present invention is based on the object of using the main patent in such a brake system without any major design changes and with minimal additional effort. These The object is achieved according to the features of the first claim.
Gemäß der Erfindung werden mittels der von der Stellung der beweglichen Speicherkammer abhängigen Signale im Falle eines Lecks in einer Bremsleitung oder Radbremszylinders die vor diesen angeordneten Ventilanordnungen abgesperrt. Die Speicherkammer inclusive der Mittel zur Erzeugung der Signale erfüllt somit auch die Funktion eines Volumenwächters gemäß des Hauptpatentes· Verkleinert sich nämlich das in der Speicherkammer befindliche Volumen unter einen bestimmten Wert, so ist diei, wenn die Pumpe fördert, ein Kriterium für ein Leck in dem Bremssystem. Wird dabei mittels eines, die Stellung des beweglichen Gliedes der Speicherkammer sensierenden Signalgebers, der in bekannter Weise nur einen geringen Mehraufwand erfordert, ein Signal erzeugt, so können damit sehr einfach die Absperrventile angesteuert und ein weiteres Ausfließen von Bremsflüssigkeit verhindert werden.According to the invention, by means of the signals dependent on the position of the movable storage chamber in In the event of a leak in a brake line or wheel brake cylinder, the valve arrangements arranged in front of them locked. The storage chamber including the means for generating the signals thus also fulfills the function of a volume monitor according to the main patent. That is, that which is located in the storage chamber is reduced in size Volume below a certain value, so is the i if the pump delivers, a criterion for a leak in the brake system. This is done by means of one, the position of the movable member of the storage chamber sensing signal transmitter, which in a known manner is only a small Requires additional effort, generates a signal, so the shut-off valves can be controlled and very easily any further leakage of brake fluid can be prevented.
In einer bevorzugten Weiterbildung gemäß des dritten Patentanspruches ist eine Auswerteschaltung vorgesehen, welche mittels logischer Verknüpfungen in einem Testzyklus das Absperrventil betätigt, welches in dem Teil des Bremssystemes mit einem Leck sich befindet. Daher kann mit dem Bremssystem auch weiterhin eine hohe Rest-In a preferred development according to the third claim, an evaluation circuit is provided, which actuates the shut-off valve in a test cycle by means of logical links, which in the part the brake system is leaking. Therefore, with the brake system, a high residual
509813/0507509813/0507
Z J 4 O ö D U E-301 / 4Z J 4 O ö D U E-301/4
-If--If-
bremswirkung erreicht werden. Der elektronische Aufwand für die Auswerteschaltung, welche aus wenigen Gatterkombinationen aufgebaut ist, ist gering.braking effect can be achieved. The electronic effort for the evaluation circuit, which consists of a few Gate combinations is built up is low.
In einer weiteren bevorzugten Ausbildung gemäß den Merkmalen des neunten Patentanspruches ist der Pumpe ein Druckfühler zugeordnet. Mittels des genannten Druckfühlers werden bei Unterschreiten eines vorwählbaren Druckes Signale erzeugt, welche ebenfalls ein Kriterium für ein Leck im Bremssystem darstellen. Diese Signale werden entweder zusätzlich zu den Signalen des Signalgebers oder auch anstelle dieser gegebenenfalls zur Absperrung der genannten Absperrventile verwendet.In a further preferred embodiment according to the features of the ninth claim, the pump a pressure sensor is assigned. By means of the mentioned pressure sensor, if the value falls below a preselectable Pressure generates signals, which are also a criterion for a leak in the brake system. These signals are either in addition to the signals of the signal generator or also instead of them if necessary used to shut off the shut-off valves mentioned.
Es hat sich weiterhin als sehr vorteilhaft erwiesen, den Vorratsbehälter mit einem Füllstandsfühler gemäß des zehnten Patentanspruches zu versehen. Mittels dieses Fühlers können beispielsweise nach jeder Bremsung, wenn also die Füllstandshöhe der Bremsflüssigkeit wieder angestiegen ist, Hilfssignale erzeugt werden, die einen Testzyklus zur Überprüfung des Bremssystemes einleiten. Diese Signale können gegebenenfalls bei Unterschreiten einer bestimmten unteren Füllstandshöhe auch zur Ansteuerung einer Warneinrichtung verwendet werden.It has also proven to be very advantageous to equip the storage container with a level sensor according to FIG of the tenth claim. This sensor can be used, for example, after each braking, if the level of the brake fluid has risen again, auxiliary signals are generated, which initiate a test cycle to check the braking system. These signals can be used if necessary If the fill level falls below a certain level, it is also used to control a warning device will.
In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigt:Exemplary embodiments of the invention are shown in the drawing. It shows:
Fig. 1 - ein hydraulisches Bremssystem mit Pumpe und Speicherkammer sowie elektrischem Signalgeber; Figure 1 - a hydraulic brake system with a pump and reservoir chamber as well as electric signal transmitter.
Fig. 2 - eine Schaltung zur Sensierung eines Leckes in einem Bremssystem gemäß Fig. 1.FIG. 2 shows a circuit for sensing a leak in a brake system according to FIG. 1.
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_g^ E-301 /β _g ^ E-301 / β
In Pig. 1 ist ein hydraulisches Bremssystem mit Antiblockierregier dargestellt, enthaltend eine Pumpe 1 mit einem Antrieb 2, welche die Druckflüssigkeit aus einem Vorratsbehälter 3 ansaugt und über Rückschlagventile 6 in eine Druckleitung 4 einspeist. Die Druckleitung 4 ist mit einer Speicherkammer 5 verbunden. Zur Einsteuerung des Bremsdruckes an die Bremsen ist eine Ventilanordnung 7 vorgesehen, die in ihrer Ruhestellung die Druckleitung 4 sperrt und die Radbremsen der Räder 8 und 9 niit einer Rückführleitung 10 verbindet. In dieser Stellung herrscht somit kein Druck an den Bremsen, während in einer zweiten Stellung, in welcher zusätzlich auch die Rückführleitung 10 abgesperrt ist, der Druck an den Bremsen beibehalten werden kann. In einer dritten Stellung, in welcher die Druckleitung 4 zu den Rädern durchgeschaltet ist, ist ein Druckanstieg möglich. Die Ventilanordnung 7 wird von einem nicht dargestellten Vergleichsglied, welchem ein Signal des vom Bremspedal 11 gesteuerten Gebers und eines Gliedes zur Messung der Fahrzeugverzögerung zugeführt wird, derart gesteuert, daß für ein bestimmtes Maß der Pedalbetätigung der Bremsdruck so eingestellt wird, daß eine bestimmte Fahrzeugverzögerung zustandekommt. Da diese Einsteuerung des Bremsdruckes nicht Gegenstand der Erfindung ist, sei an dieser Stelle nicht weiter darauf eingegangen, über ein der Ventilanordnung 7 nachgeschaltetes Ventil 13 erfolgt die Aufteilung auf zwei Bremskreise. In die genannten Bremskreise sind Druckregelventile 14, 15 für die beiden Räder 18 der Vorderachse sowie ein Druckregelventil 16 für die beiden Räder 19 der Hinterachse des Fahrzeuges nachgeschaltet·In Pig. 1 is a hydraulic braking system with anti-lock control shown, containing a pump 1 with a drive 2, which the pressure fluid from sucks in a reservoir 3 and feeds it into a pressure line 4 via check valves 6. The pressure line 4 is connected to a storage chamber 5. To apply the brake pressure to the brakes is a valve arrangement 7 is provided which, in its rest position, blocks the pressure line 4 and the wheel brakes the wheels 8 and 9 niit a return line 10 connects. In this position there is no pressure on the brakes, while in a second position, in which also the return line 10 is blocked, the pressure at the brakes can be maintained can. In a third position, in which the pressure line 4 is switched through to the wheels, is a Pressure increase possible. The valve arrangement 7 is of a comparator, not shown, which a signal from the transmitter controlled by the brake pedal 11 and a member for measuring the vehicle deceleration is supplied, controlled in such a way that the brake pressure is set for a certain amount of pedal actuation is that a certain vehicle deceleration comes about. Since this control of the brake pressure is not the subject of the invention, it will not be discussed further at this point about one of the Valve arrangement 7 downstream valve 13 is divided into two brake circuits. In the mentioned Brake circuits are pressure control valves 14, 15 for the two Wheels 18 of the front axle and a pressure control valve 16 for the two wheels 19 of the rear axle of the vehicle downstream
Die genannten Ventile 14 bis 16 sollen normalerweise eine ungehinderte Druckzufuhr zu den Radbremsen ermöglichen, in einer zweiten Stellung die Zufuhr von Brems-The valves 14 to 16 mentioned should normally allow an unimpeded supply of pressure to the wheel brakes, in a second position the supply of braking
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r E-301 / <5 r E-301 / <5
flüssigkeit absperren und in einer dritten Stellung unter Beibehaltung der Unterbrechung der Bremsleitung durch Ausfließenlassen von zwischen den Ventilen und der Radbremse eingeschlossener Bremsflüssigkeit zum Vorratsbehälter 3 den Bremsdruck absenken können. Die genannten Ventile 14 bis 16 werden einzeln in bekannter Weise von dem Antiblockierregler entsprechend des Bewegungsverhaltens des zugeordneten Rades gesteuert. Den derart aufgeteilten Bremskreisen sind weiterhin Zylinder-Kolbenanordnungen 17 zugeordnet, die bei Ausfall des bisher beschriebenen Bremssystemes aufgrund des dabei weiter betätigten Bremspedales 11 die übliche Bremsbetätigung noch ermöglichen. Der Speicherkammer 4 ist erfindungsgemäß ein Signalgeber 18 zugeordnet, welcher in Abhängigkeit von der Stellung des Kolbens 14 Signale erzeugen kann, und als analoger oder digitaler Geber ausgebildet sein kann.Shut off the fluid and in a third position while maintaining the interruption of the brake line by allowing brake fluid trapped between the valves and the wheel brake to flow out to the Reservoir 3 can lower the brake pressure. Said valves 14 to 16 are individually known Way controlled by the anti-lock regulator according to the movement behavior of the assigned wheel. The brake circuits divided in this way are also assigned cylinder-piston arrangements 17, which in the event of failure of the previously described brake system due to the continued operation of the brake pedal 11 the usual Still enable brake actuation. According to the invention, a signal transmitter 18 is assigned to the storage chamber 4, which can generate signals depending on the position of the piston 14, and as an analog or digital encoder can be formed.
In Fig. 2 ist eine digitale Schaltung zur Sensierung eines Lecks in dem Bremssystem gemäß Fig. 1 dargestellt, wobei der Signalgeber 18 derart ausgebildet ist, daß er für die linke Endstellung des Kolbens 19 (bei kleinem Volumen in der Speicherkammer) ein Signal gibt. Der Ausgang des Signalgebers 18 ist mit dem Eingang 21 eines UHD-Gatters 23 verbunden. Am Eingang 20 des genannten Gatters liegt bei Betätigen des Bremspedales ein Signal und weiterhin am Eingang 22 ein Signal, wenn die Pumpe 2 in Betrieb ist. Das Gatter 23 ist mit einem UND-Gatter 24 verbunden und zwar einmal direkt und zum anderen über ein Verzögerungsglied 25 auf einen negierten Eingang. Tritt am Gatter 23 ein Signal auf, so erscheint am Ausgang 26 des Gatters 24 solange ein Signal, wie die Verzögerungszeit (beispielsweise 200 ms) des Verzogerungsgliedes 25 ist. Der Ausgang 26 dient zur gemeinsamen Ansteuerung der Absperrventile 14 bis 16 gemäß Fig. 1. Dem Gatter 23 sind zwei bistabileFIG. 2 shows a digital circuit for sensing a leak in the brake system according to FIG. 1, The signal transmitter 18 is designed in such a way that it can be used for the left end position of the piston 19 (with a small Volume in the storage chamber) gives a signal. The output of the signal generator 18 is connected to the input 21 a UHD gate 23 connected. At the input 20 of said gate is when the brake pedal is pressed a signal and also at input 22 a signal when the pump 2 is in operation. The gate 23 is with one AND gate 24 connected, once directly and on the other hand via a delay element 25 to a negated Entry. If a signal occurs at gate 23, a signal appears at output 26 of gate 24 as long as how the delay time (for example 200 ms) of the delay element 25 is. The output 26 is used for the joint control of the shut-off valves 14 to 16 according to FIG. 1. The gate 23 is two bistable
509813/0507509813/0507
E-301 / ψ E-301 / ψ
Kippstufen 28, 29 nachgeschaltet. Der Eingang 21 ist negiert auf ein UND-Gatter 30 geschaltet, mit welchem ebenfalls der Eingang 22 verbunden ist. Ein weiteres UND-Gatter, welches vom Gatter 30 sowie den Ausgang der Kippstufe 28 angesteuert wird, ist mit einem zweiten Eingang der Kippstufe 28 verbunden. Auf ein UND-Gatter 33 ist der Ausgang der Kippstufe 29 direkt und der Ausgang der Kippstufe 28 negiert geführt. Der Ausgang 34 ist sowohl mit den Absperrventilen 14, 15, als auch mit einem UND-Gatter 36 verbunden, an dessen zweiten Eingang über ein Verzögerungsglied 38 (Verzögerungszeit z.B. 100 ms), der Ausgang des Gatters 30 liegt. Das genannte UND-Gatter 36 ist weiterhin über eine Kippstufe 39 und deren Ausgang 40 mit den Absperrventilen 14, 15 der Vorderachse verbunden. Dem Gatter 33 ist ein UND-Gatter 42, ein Verzögerungsglied 43 (Verzögerungszeit z.B. 200 ms) sowie eine bistabile Kippstufe 44 nachgeschaltet, deren Ausgang 45 zum Absperrventil 16 der Hinterachse führt. Zum Nullsetzen der Kippstufen 29» 39» 44 ist ein Eingang 47 vorgesehen, an welchem mit dem Einschalten der Zündung des Fahrzeugmotors kurzzeitig ein Signal ansteht. Über die ODER-Gatter 49, 50 sind die Ausgänge der Gatter 23» 33 sowie der Kippstufe 45 auf einervorzugsweise als Warnlampe 51 ausgebildete Warneinrichtung geführt, welche bei einem Leck im Bremssystem aufleuchtet. Das Gebersignal vom Eingang 21 sowie das negierte Pumpenmotor signal vom Eingang 22 sind über ein UND-Gatter 53 und das ODER-Gatter 50 auf die Warnlampe 51 geführt, so daß bei Ausfall des Pumpenmotors 2 ebenfalls die Warnlampe 51 aufleuchtet.Flip-flops 28, 29 connected downstream. The input 21 is switched negated to an AND gate 30, with which the input 22 is also connected. Another AND gate, which is from gate 30 and the output the flip-flop 28 is controlled is connected to a second input of the flip-flop 28. On an AND gate 33, the output of flip-flop 29 is direct and the output of flip-flop 28 is negated. The exit 34 is connected both to the shut-off valves 14, 15 and to an AND gate 36, at the second of the latter Input via a delay element 38 (delay time e.g. 100 ms), the output of gate 30 is located. Said AND gate 36 is also via a flip-flop 39 and its output 40 with the shut-off valves 14, 15 connected to the front axle. The gate 33 is an AND gate 42, a delay element 43 (delay time e.g. 200 ms) as well as a bistable flip-flop 44 connected downstream, whose output 45 to the shut-off valve 16 of the rear axle leads. An input 47 is provided for setting the flip-flops 29 »39» 44 to zero which briefly receives a signal when the vehicle engine ignition is switched on. About the OR gate 49, 50 are the outputs of the gates 23 »33 and of the flip-flop 45 on a preferably warning lamp 51 trained warning device out, which lights up in the event of a leak in the brake system. The encoder signal from Input 21 and the negated pump motor signal from the input 22 are led via an AND gate 53 and the OR gate 50 to the warning lamp 51, so that if the Pump motor 2 also the warning lamp 51 lights up.
Die Funktionsweise der Auswerteschaltung ist folgende:The function of the evaluation circuit is as follows:
Liegen an den Eingängen 20, 22 Signale an (es wird gebremst, Pumpe arbeitet) und kommt infolge einer Verringerung des Volumens der Speicherkammer 5 mittels des Signalgebers 18 ein Signal an den Eingang 21, soIf there are signals at the inputs 20, 22 (braking, the pump is working) and a decrease occurs of the volume of the storage chamber 5 by means of the signal generator 18 a signal to the input 21, so
509813/0507509813/0507
wird ein Testzyklus eingeleitet und mittels des Gatters 24 werden zunächst sämtliche Absperrventile 14 bis 16 während der Verzögerungszeit von beispielsweise 200 ms abgesperrt. Ändert sich dabei das Signal des Gebers 18 nicht, so muß ein Leck vor den Absperrventilen vorhanden sein, beispielsweise in der Druckleitung 4. In einem derartigen Falle wird das Gebersignal zum Absperren des Steuerventiles 7 verwendet, so daß ein weiterer Druckmittel verlust verhindert wird. Die Bemessung des Fahrzeuges erfolgt dann mittels der Zylinder-Kolbenanordnung 17· Ändert sich hingegen das Signal des Gebers 18, so wird über das.Gatter 31 die Kippstufe 28 auf Null gesetzt und am Ausgang 34 erscheint ein Signal; dies bedeutet, daß ein Leck hinter den Absperrventilen 14 bis liegen muß. Mit diesem Signal werden die Absperrventile 14, 15 der Vorderachse angesteuert. Verschwindet dann das Gebersignal, so wird über das Verzögerungsglied 38 und das Gatter 36 die Kippstufe 39 gesetzt und am Ausgang 40 erscheint ein Signal, mit welchem die Absperrventile 14, 15 auch weiterhin angesteuert werden. Somit wird bei einem Leck hinter den Ventilen 14, 15 ein weiterer Flüssigkeit sverlust vermieden und eine Restbremswirkung gewährleistet. Bleibt hingegen das Gebersignal bestehen (kein Leck hinter den Ventilen 14, 15)» so wird über das Gatter 42 sowie das Verzögerungsglied 43 nach einer Zeit von beispielsweise 200 ms die Kippstufe 44 gesetzt und am Ausgang 45 erscheint ein Signal, mit welchem das Absperrventil 16 betätigt und ein weiteres Ausfließen von Bremsflüssigkeit verhindert wird.a test cycle is initiated and all shut-off valves 14 to 16 are initially activated by means of gate 24 during the delay time of, for example, 200 ms locked. If the signal from the transmitter 18 does not change, there must be a leak in front of the shut-off valves be, for example in the pressure line 4. In such a case, the transmitter signal is used to shut off of the control valve 7 is used, so that a further loss of pressure medium is prevented. The dimensioning of the Vehicle is then carried out by means of the cylinder-piston arrangement 17 If, on the other hand, the signal of the transmitter 18 changes, so the trigger stage 28 is set to zero via the gate 31 and a signal appears at output 34; this means, that there must be a leak behind the shut-off valves 14 to. With this signal, the shut-off valves 14, 15 of the front axle controlled. Then that disappears Encoder signal, the delay element 38 and the gate 36, the flip-flop 39 is set and a signal appears at the output 40, with which the shut-off valves 14, 15 can still be controlled. Thus, at a leak behind the valves 14, 15 another liquid s loss avoided and a residual braking effect guaranteed. If, however, the encoder signal remains (no leak behind valves 14, 15) »so is over the gate 42 and the delay element 43 after a The trigger stage 44 is set for a time of 200 ms, for example and a signal appears at output 45 with which the Shut-off valve 16 is actuated and a further outflow of brake fluid is prevented.
In dem dargestellten Ausführungsbeispiel wurde das zeitlich nacheinander erfolgende Absperren und das logische Abfragen der verschiedenen Stellungsmöglichkeiten des Speicherkammerkolbens bei einem Zweikreis-Bremssystem erläutert. Es liegt im Eahmen der Erfindung auch beiIn the illustrated embodiment, the sequential shut-off and the logical Querying the various possible positions of the storage chamber piston in a two-circuit brake system explained. It is also included within the scope of the invention
/ 9/ 9
509813/0507509813/0507
E-501 / V E-501 / V
Bremssystemen mit anderer Aufteilung oder mit mehr
(z.B. 3) Bremskreisen eine derartige Lecksensierung
vorzunehmen, wobei wesentlich ist, daß in Abhängigkeit der Stellung oder Stellungen eines beweglichen Gliedes
einer Speicherkammer, Signale erzeugt werden, welche
zum Sperren des Absperrventiles führen, welches in der defekten Bremsleitung liegt.Brake systems with a different division or with more
(e.g. 3) brake circuits such a leak detection
to undertake, it being essential that, depending on the position or positions of a movable member of a storage chamber, signals are generated which
lead to the blocking of the shut-off valve, which is located in the defective brake line.
- Patentansprüche -- patent claims -
509813/0507509813/0507
Claims (14)
dadurch gekennzeichnet, daß mittels eines UND-Gatters 24, welchem das Signal des Signalgebers 18 sowohl direkt, als auch über ein Verzögerungsglied 25 negiert zuführbar ist, sämtliche Absperrventile zunächst gleichzeitig betätigbar sind und daß anschließend die Absperrventile mittels Gatter 33»
sowie Verzögerungsgliedern 38, 43 nacheinander betätigbar sind und gegebenenfalls bei Verschwinden
des Signales des Signalgebers 18 mittels Kippstufen 39, 44 auch betätigt bleiben.5 · Hydraulic braking system according to claim. 3 or 4,
characterized in that by means of an AND gate 24, to which the signal of the signal generator 18 can be fed both directly and negated via a delay element 25, all shut-off valves can initially be actuated simultaneously and that then the shut-off valves by means of gate 33 »
and delay elements 38, 43 can be actuated one after the other and, if necessary, when they disappear
of the signal of the signal generator 18 also remain actuated by means of flip-flops 39, 44.
Auswerteschaltung ein Eingangsgatter 23 aufweist,
welches ein von der Betätigung des Bremspedales
abhängiges Signal, ein von der Betätigung der Pumpe abhängiges Signal sowie das Signal vom Signalgeber 18 miteinander verknüpft.6. Hydraulic brake system according to one of the preceding claims, characterized in that the
Evaluation circuit has an input gate 23,
which one of the operation of the brake pedal
dependent signal, a signal dependent on the actuation of the pump and the signal from the signal generator 18 are linked to one another.
eines Absperrventiles betätigbar ist.7. Hydraulic brake system according to one of the preceding claims, characterized in that a warning device, preferably designed as a flat 1, is provided which, when a signal from the signal generator 18 and / or a signal from the evaluation circuit is present, is used for control
a shut-off valve can be actuated.
G/I>t-Sch/Ba E-301Heidelberg, August 20, 1973
G / I> t-Sch / Ba E-301
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732345860 DE2345860A1 (en) | 1970-09-23 | 1973-09-12 | Hydraulic brake system with leak detector - monitors reservoir fluid level and pressure and shuts off respective brakes |
| JP10428974A JPS5610221B2 (en) | 1973-09-12 | 1974-09-10 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702046802 DE2046802A1 (en) | 1970-09-23 | 1970-09-23 | Hydraulic braking system with anti-lock regulator |
| DE19732345860 DE2345860A1 (en) | 1970-09-23 | 1973-09-12 | Hydraulic brake system with leak detector - monitors reservoir fluid level and pressure and shuts off respective brakes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2345860A1 true DE2345860A1 (en) | 1975-03-27 |
Family
ID=25759768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19732345860 Pending DE2345860A1 (en) | 1970-09-23 | 1973-09-12 | Hydraulic brake system with leak detector - monitors reservoir fluid level and pressure and shuts off respective brakes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2345860A1 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2613219A1 (en) * | 1976-03-27 | 1977-10-06 | Bosch Gmbh Robert | HYDRAULIC BRAKE AMPLIFIER |
| FR2393706A1 (en) * | 1977-06-11 | 1979-01-05 | Bosch Gmbh Robert | CENTRAL CONTROL FOR THE ENERGY SUPPLY OF DIFFERENT PARTS OF A VEHICLE |
| DE3010379A1 (en) * | 1979-05-02 | 1980-11-13 | Budd Co | ANTI-BLOCKING SYSTEM FOR VEHICLE BRAKES |
| DE3237959A1 (en) * | 1981-11-14 | 1983-05-26 | Robert Bosch Gmbh, 7000 Stuttgart | Hydraulic dual circuit servo brake device |
| DE3232051A1 (en) * | 1982-08-28 | 1984-03-01 | Alfred Teves Gmbh, 6000 Frankfurt | METHOD FOR MONITORING AND CONTROLLING EXTERNAL ENERGY-SUPPLIED HYDRAULIC BRAKE-SLIP CONTROL SYSTEMS AND DEVICE FOR IMPLEMENTING THE METHOD |
| FR2564400A1 (en) * | 1984-05-15 | 1985-11-22 | Teves Gmbh Alfred | BRAKING SYSTEM FOR MOTOR VEHICLES |
| DE3627809A1 (en) * | 1986-08-16 | 1988-02-18 | Teves Gmbh Alfred | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCKING PROTECTION AND / OR DRIVE SLIP CONTROL |
| FR2603540A1 (en) * | 1986-09-05 | 1988-03-11 | Teves Gmbh Alfred | SLIDING REGULATING HYDRAULIC BRAKING SYSTEM |
| WO1988002710A1 (en) * | 1986-10-14 | 1988-04-21 | Allied Corporation | Anti-lock braking system with failure detection and pressure recovery |
| DE3731603A1 (en) * | 1986-11-06 | 1988-05-19 | Teves Gmbh Alfred | BRAKE SYSTEM |
| US4753492A (en) * | 1983-12-07 | 1988-06-28 | Robert Bosch Gmbh | Monitoring arrangement for anti-skid automotive brake system |
| DE3731408A1 (en) * | 1987-09-18 | 1989-04-06 | Teves Gmbh Alfred | Brake system with slip control |
| US4826255A (en) * | 1986-11-06 | 1989-05-02 | Alfred Teves Gmbh | Anti-lock brake system with variable delivery pump controlled in response to detected position of master cylinder piston and method therefor |
| EP0328082A2 (en) * | 1988-02-09 | 1989-08-16 | Sumitomo Electric Industries Limited | Antilock control device |
| DE3803363A1 (en) * | 1988-02-05 | 1989-08-17 | Teves Gmbh Alfred | PRESSURE-OPERATED BRAKE SYSTEM WITH BLOCK-PROTECTED DRIVE-SLIP CONTROL |
| DE3808523A1 (en) * | 1987-09-19 | 1989-09-28 | Teves Gmbh Alfred | Brake system for motor vehicles with antilock control |
| FR2631913A1 (en) * | 1988-05-28 | 1989-12-01 | Teves Gmbh Alfred | CIRCUIT ARRANGEMENT FOR CONTROLLING A BRAKE SYSTEM WITH PRESSURE REGULATION AND AN AUXILIARY ENERGY SOURCE |
| EP0391353A1 (en) * | 1989-04-03 | 1990-10-10 | Sumitomo Electric Industries, Ltd. | Brake device |
-
1973
- 1973-09-12 DE DE19732345860 patent/DE2345860A1/en active Pending
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2613219A1 (en) * | 1976-03-27 | 1977-10-06 | Bosch Gmbh Robert | HYDRAULIC BRAKE AMPLIFIER |
| FR2393706A1 (en) * | 1977-06-11 | 1979-01-05 | Bosch Gmbh Robert | CENTRAL CONTROL FOR THE ENERGY SUPPLY OF DIFFERENT PARTS OF A VEHICLE |
| DE3010379A1 (en) * | 1979-05-02 | 1980-11-13 | Budd Co | ANTI-BLOCKING SYSTEM FOR VEHICLE BRAKES |
| DE3237959A1 (en) * | 1981-11-14 | 1983-05-26 | Robert Bosch Gmbh, 7000 Stuttgart | Hydraulic dual circuit servo brake device |
| DE3232051A1 (en) * | 1982-08-28 | 1984-03-01 | Alfred Teves Gmbh, 6000 Frankfurt | METHOD FOR MONITORING AND CONTROLLING EXTERNAL ENERGY-SUPPLIED HYDRAULIC BRAKE-SLIP CONTROL SYSTEMS AND DEVICE FOR IMPLEMENTING THE METHOD |
| FR2532259A1 (en) * | 1982-08-28 | 1984-03-02 | Teves Gmbh Alfred | METHOD AND DEVICE FOR CONTROLLING AND CONTROLLING HYDRAULIC BRAKE SLIP CONTROL SYSTEMS |
| US4753492A (en) * | 1983-12-07 | 1988-06-28 | Robert Bosch Gmbh | Monitoring arrangement for anti-skid automotive brake system |
| FR2564400A1 (en) * | 1984-05-15 | 1985-11-22 | Teves Gmbh Alfred | BRAKING SYSTEM FOR MOTOR VEHICLES |
| US5066073A (en) * | 1984-05-15 | 1991-11-19 | Alfred Teves Gmbh | Brake system for automotive vehicles |
| DE3627809A1 (en) * | 1986-08-16 | 1988-02-18 | Teves Gmbh Alfred | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCKING PROTECTION AND / OR DRIVE SLIP CONTROL |
| US4804236A (en) * | 1986-08-16 | 1989-02-14 | Alfred Teves Gmbh | Hydraulic brake system with anti-skid control and/or traction slip control |
| US4824182A (en) * | 1986-09-05 | 1989-04-25 | Alfred Teves Gmbh | Anti-lock hydraulic brake system for automotive vehicles |
| DE3630342A1 (en) * | 1986-09-05 | 1988-03-17 | Teves Gmbh Alfred | BLOCK-PROTECTED HYDRAULIC BRAKE SYSTEM FOR MOTOR VEHICLES |
| FR2603540A1 (en) * | 1986-09-05 | 1988-03-11 | Teves Gmbh Alfred | SLIDING REGULATING HYDRAULIC BRAKING SYSTEM |
| WO1988002710A1 (en) * | 1986-10-14 | 1988-04-21 | Allied Corporation | Anti-lock braking system with failure detection and pressure recovery |
| US4826255A (en) * | 1986-11-06 | 1989-05-02 | Alfred Teves Gmbh | Anti-lock brake system with variable delivery pump controlled in response to detected position of master cylinder piston and method therefor |
| DE3731603A1 (en) * | 1986-11-06 | 1988-05-19 | Teves Gmbh Alfred | BRAKE SYSTEM |
| DE3731603C2 (en) * | 1986-11-06 | 2001-11-22 | Continental Teves Ag & Co Ohg | Anti-lock vehicle brake system |
| DE3731408A1 (en) * | 1987-09-18 | 1989-04-06 | Teves Gmbh Alfred | Brake system with slip control |
| DE3808523A1 (en) * | 1987-09-19 | 1989-09-28 | Teves Gmbh Alfred | Brake system for motor vehicles with antilock control |
| DE3803363A1 (en) * | 1988-02-05 | 1989-08-17 | Teves Gmbh Alfred | PRESSURE-OPERATED BRAKE SYSTEM WITH BLOCK-PROTECTED DRIVE-SLIP CONTROL |
| EP0328082A2 (en) * | 1988-02-09 | 1989-08-16 | Sumitomo Electric Industries Limited | Antilock control device |
| EP0328082A3 (en) * | 1988-02-09 | 1991-01-09 | Sumitomo Electric Industries Limited | Antilock control device |
| FR2631913A1 (en) * | 1988-05-28 | 1989-12-01 | Teves Gmbh Alfred | CIRCUIT ARRANGEMENT FOR CONTROLLING A BRAKE SYSTEM WITH PRESSURE REGULATION AND AN AUXILIARY ENERGY SOURCE |
| EP0391353A1 (en) * | 1989-04-03 | 1990-10-10 | Sumitomo Electric Industries, Ltd. | Brake device |
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