WO1999021744A1 - Device and method for controlling a braking system - Google Patents
Device and method for controlling a braking system Download PDFInfo
- Publication number
- WO1999021744A1 WO1999021744A1 PCT/EP1998/006848 EP9806848W WO9921744A1 WO 1999021744 A1 WO1999021744 A1 WO 1999021744A1 EP 9806848 W EP9806848 W EP 9806848W WO 9921744 A1 WO9921744 A1 WO 9921744A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake pedal
- brake
- signal
- time reference
- wheel
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—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
- B60T8/3255—Systems in which the braking action is dependent on brake pedal data
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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
- B60T8/321—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
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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
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/404—Brake-by-wire or X-by-wire failsafe
Definitions
- the invention relates to a device and a method for controlling a brake system, having a brake pedal, a first brake pedal sensor device for detecting an actuation of the brake pedal and outputting a first brake pedal signal, a second brake pedal sensor device for detecting an actuation of the brake pedal and outputting a second brake pedal signal, and at least one Wheel brake device which is operated in accordance with the first and second brake pedal signals.
- Such a device for controlling or regulating a brake system is known from DE 195 10 525 AI.
- a brake pedal actuation of the driver is detected by two measuring devices which determine different physical variables that characterize the brake pedal actuation. These physical quantities are e.g. the pedal travel, the pedal force, the pedal angle, the pedal pressure and their time derivatives.
- the measuring signals of the measuring devices are each converted by a processing unit into a signal which corresponds to the driver's braking request, ie represents a measure of the desired braking effect.
- data buses in particular event-controlled data buses, is particularly advantageous, since this enables simple input of data from other electronic units of the vehicle into the device for controlling the brake system, so that the entire control device can be easily expanded and modified.
- two parallel data buses are used for reasons of redundancy.
- Figure 1 is a block diagram of an inventive device for controlling a brake system.
- Fig. 2 is a block diagram of a first embodiment of a brake pedal sensor device
- Fig. 3 is a block diagram of a second embodiment of a brake pedal sensor device.
- FIG. 1 A device for controlling a brake system is shown schematically in FIG. 1. This device represents a so-called brake-by-wire system, since the signals or X) ß
- a global clock 12 is connected to the data bus 1, the function of which is explained in more detail below.
- Brake pedal sensor device 3 or 4 is shown in FIG. 2.
- This sensor device has n sensor elements 15, each of which detects an actuation of the brake pedal signal. At least two, preferably three or more sensor elements 15 are provided.
- the sensor elements 15 each have a sensor 16, an A / D converter 17 for digitizing the sensor signal and a counter 18 for generating a time stamp or a time reference.
- the sensor 16 detects a physical variable that characterizes the actuation of the brake pedal. These physical quantities are e.g. the pedal travel, the pedal force, the pedal angle, the pedal pressure and their time derivatives.
- the analog sensor signal is converted by the A / D converter 17 into a digital signal, which in the present exemplary embodiment comprises 12 bits.
- the counter 18 counts with a predetermined cycle, which is preferably a cycle which is uniform in the entire brake system, and outputs a counter value which represents a time signal.
- the counter value comprises 4 bits and is added to the digital sensor signal as a time stamp.
- the resulting value 19 thus forms a digital 16-bit number which contains both the sensed sensor information and information about the time of detection.
- the other sensor elements 15 differ only in the type of sensor 16, preferably other physical quantities with the other sensors 16 for safety reasons 00
- the consolidation device 23 is preferably arranged in the brake pedal sensor device 3, 4, so that only the preprocessed brake request signal is fed into the bus 1 instead of the individual resulting values 19 of the sensor elements 15. As a result, the data transmission capacity of the data bus 1 can be kept small. In the context of the invention, however, it is also possible to provide the consolidation device in the central computer 10 or on each wheel brake device 7.
- FIG. 3 A further, simplified exemplary embodiment of the brake pedal sensor device 3, 4 is shown in FIG. 3.
- This brake pedal sensor device has essentially the same structure as the device shown in FIG. 2, which is why the same parts are provided with the same reference numerals.
- This brake pedal sensor device 3, 4 in turn has n sensors 16, all of which are read out simultaneously at a predetermined cycle.
- a / D converters 17 are controlled by a clock signal, so that they convert the respective analog value present on their input side into a digital value and output it on the output side.
- a counter 18 generates a time stamp with the clock signal.
- the sensor signals of the individual sensors 16 are processed in an evaluation unit 22 by a consolidation device 23 and a voting device 24 to form a braking request signal.
- the time stamp generated by the counter 18 for the further transmission in the data bus 1 is only added to this braking request signal.
- a plurality of the A / D converters 17 can each be replaced by a single A / D converter, which is connected to the associated sensors 16 with a multiplexer for reading out a sensor signal.
- a time stamp is generated at the same time as the sensor signals are read out.
- each sensor signal is individually processed in the evaluation unit and then combined with the corresponding time stamp.
- the sensor signals are evaluated in the evaluation unit according to the following requirements:
- the individual functions can also apply to elements other than the evaluation unit 22, such as the central computer 10 or the wheel brake devices 7.
- the evaluation unit is preferably redundant and fault-tolerant. It can be integrated in the pedal or carried out separately.
- the counters 18 operate in a cycle that is as uniform as possible for the entire device for controlling the brake system, which is predetermined, for example, by one or more quartz crystals. Instead of this "quartz clock", the sampling rate at which the sensors 16 are read out can be used as the clock, the counter value being increased by one for each reading clock.
Abstract
The invention relates to a device for controlling an automotive braking system, comprising a brake pedal (5), a brake pedal sensor device (3,4) to detect actuation of said brake pedal (5) and emission of a brake pedal signal (S1,S2), in addition to at least one wheel braking device (7) which is actuated according to the brake pedal signal (S1,S2). The device is characterised in that it includes a device for generating and adding a time reference to the brake pedal signal. This means that the brake pedal signal can be monitored at any moment with regard to current status and problems can be compensated by delayed data transmission.
Description
Vorrichtung und Verfahren zur Steuerung einer Bremsanlage Device and method for controlling a brake system
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Steuerung einer Bremsanlage, mit einem Bremspedal, einer ersten Bremspedalsensoreinrichtung zum Erfassen einer Betätigung des Bremspedals und Ausgeben eines ersten Bremspedalsignals, einer zweiten Bremspedalsensoreinrichtung zum Erfassen einer Betätigung des Bremspedals und Ausgeben eines zweiten Bremspedalsignals, und zumindest eine Radbremseinrichtung, die nach Maßgabe des ersten und zweiten Bremspedalsignals betätigt wird.The invention relates to a device and a method for controlling a brake system, having a brake pedal, a first brake pedal sensor device for detecting an actuation of the brake pedal and outputting a first brake pedal signal, a second brake pedal sensor device for detecting an actuation of the brake pedal and outputting a second brake pedal signal, and at least one Wheel brake device which is operated in accordance with the first and second brake pedal signals.
Eine solche Vorrichtung zur Steuerung bzw. Regelung einer Bremsanlage ist aus der DE 195 10 525 AI bekannt. Eine Bremspedalbetätigung des Fahrers wird hierbei von zwei Meßeinrichtungen erfaßt, die unterschiedliche, die Bremspedalbetätigung charakterisierende physikalische Größen ermitteln. Diese physikalischen Größen sind z.B. der Pedalweg, die Pedalkraft, der Pedalwinkel, der Pedaldruck und deren zeitliche Ableitungen.Such a device for controlling or regulating a brake system is known from DE 195 10 525 AI. A brake pedal actuation of the driver is detected by two measuring devices which determine different physical variables that characterize the brake pedal actuation. These physical quantities are e.g. the pedal travel, the pedal force, the pedal angle, the pedal pressure and their time derivatives.
Die Meßsignale der Meßeinrichtungen werden von einer Verarbeitungseinheit in jeweils ein Signal umgesetzt, das dem Bremswunsch des Fahrers entspricht, d.h., ein Maß für die erwünschte Bremswirkung darstellt.
The measuring signals of the measuring devices are each converted by a processing unit into a signal which corresponds to the driver's braking request, ie represents a measure of the desired braking effect.
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Signale in der Vorrichtung zur Steuerung der Bremsanlage sichergestellt ist. Dies erfolgt am einfachsten, indem jedes Bremspedalsignal mit einem Zeitstempel eines Zählers versehen wird. Durch das Synchronisieren der Bremspedalsignale an sich ist die Übertragungszeit in den Datenübertragungsmittel bzgl. der zeitlichen Zuordnung der einzelnen Signale unkritisch. Es ist daher nicht notwendig, aufwendige Mittel zur Datenübertragung zu verwenden, die zeitlich synchronisiert die Daten übertragen, sondern es können z.B. zeitlich nicht synchronisierte Datenbusse verwendet werden.Signals in the device for controlling the brake system is ensured. The easiest way to do this is to provide each brake pedal signal with a time stamp from a counter. By synchronizing the brake pedal signals per se, the transmission time in the data transmission means with respect to the time assignment of the individual signals is not critical. It is therefore not necessary to use complex data transmission means which transmit the data synchronized in time, but instead e.g. data buses that are not synchronized in time are used.
Der Einsatz von Datenbussen, insbesondere ereignisgesteuerten Datenbussen, ist besonders vorteilhaft, da dies eine einfache Einspeisung von Daten anderer Elektronikeinheiten des Fahrzeuges in die Vorrichtung zur Steuerung der Bremsanlage ermöglicht, so daß die gesamte Steuervorrichtung einfach erweitert und abgewandelt werden kann.The use of data buses, in particular event-controlled data buses, is particularly advantageous, since this enables simple input of data from other electronic units of the vehicle into the device for controlling the brake system, so that the entire control device can be easily expanded and modified.
Bei einer bevorzugten Ausführungsform werden aus Gründen der Redundanz zwei parallele Datenbusse verwendet.In a preferred embodiment, two parallel data buses are used for reasons of redundancy.
Die Erfindung wird nachfolgend beispielhaft anhand der Zeichnungen näher erläutert. Es zeigen schematisch:The invention is explained in more detail below using the drawings as an example. They show schematically:
Fig. 1 ein Blockschaltbild einer erfindungsgemäßen Vorrichtung zur Steuerung einer Bremsanlage;Figure 1 is a block diagram of an inventive device for controlling a brake system.
Fig. 2 ein Blockschaltbild einer ersten Ausführungsform einer Bremspedalsensoreinrichtung, undFig. 2 is a block diagram of a first embodiment of a brake pedal sensor device, and
Fig. 3 ein Blockschaltbild einer zweiten Ausführungsform einer Bremspedalsensoreinrichtung.Fig. 3 is a block diagram of a second embodiment of a brake pedal sensor device.
Eine Vorrichtung zur Steuerung einer Bremsanlage ist schematisch in Fig. 1 gezeigt. Diese Vorrichtung stellt ein sogenanntes Brake-by-Wire System dar, da die Signale bzw.
X) ßA device for controlling a brake system is shown schematically in FIG. 1. This device represents a so-called brake-by-wire system, since the signals or X) ß
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An den Datenbus 1 ist eine globale Uhr 12 angeschlossen, deren Funktion weiter unten näher erläutert wird.A global clock 12 is connected to the data bus 1, the function of which is explained in more detail below.
Ein erstes Ausführungsbeispiel derA first embodiment of the
Bremspedalsensoreinrichtung 3 bzw. 4 ist in Fig. 2 gezeigt. Diese Sensoreinrichtung weist n Sensorelemente 15 auf, die jeweils eine Betätigung des Bremspedalsignals erfassen. Es sind zumindest zwei, vorzugsweise drei oder mehrere Sensorelemente 15 vorgesehen. Die Sensorelemente 15 besitzen jeweils einen Sensor 16, einen A/D- andler 17 zum Digitalisieren des Sensorsignals und einen Zähler 18 zum Erzeugen eines Zeitstempels bzw. einer Zeitreferenz.Brake pedal sensor device 3 or 4 is shown in FIG. 2. This sensor device has n sensor elements 15, each of which detects an actuation of the brake pedal signal. At least two, preferably three or more sensor elements 15 are provided. The sensor elements 15 each have a sensor 16, an A / D converter 17 for digitizing the sensor signal and a counter 18 for generating a time stamp or a time reference.
Der Sensor 16 erfaßt eine die Bremspedalbetätigung charakterisierende physikalische Größe. Diese physikalischen Größen sind z.B. der Pedalweg, die Pedalkraft, der Pedalwinkel, der Pedaldruck und deren zeitliche Ableitungen. Das analoge Sensorsignal wird vom A/D-Wandler 17 in ein digitales Signal gewandelt, das im vorliegenden Ausführungsbeispiel 12 Bit umfaßt.The sensor 16 detects a physical variable that characterizes the actuation of the brake pedal. These physical quantities are e.g. the pedal travel, the pedal force, the pedal angle, the pedal pressure and their time derivatives. The analog sensor signal is converted by the A / D converter 17 into a digital signal, which in the present exemplary embodiment comprises 12 bits.
Der Zähler 18 zählt mit einem vorbestimmten Takt, der vorzugsweise ein in der gesamten Bremsanlage einheitlicher Takt ist, und gibt einen Zählerwert aus, der ein Zeitsignal darstellt. Der Zählerwert umfaßt im vorliegenden Ausführungsbeispiel 4 Bit und wird dem digitalen Sensorsignal als Zeitstempel hinzugefügt. Der resultierende Wert 19 bildet somit eine digitale 16-Bit-Zahl, die sowohl die erfaßte Sensorinformation als auch Information über den Erfassungszeitpunkt beinhaltet. Die weiteren Sensorlemente 15 unterscheiden sich lediglich in der Art des Sensors 16, wobei vorzugsweise mit den weiteren Sensoren 16 aus Sicherheitsgründen andere physikalische Größen
00The counter 18 counts with a predetermined cycle, which is preferably a cycle which is uniform in the entire brake system, and outputs a counter value which represents a time signal. In the present exemplary embodiment, the counter value comprises 4 bits and is added to the digital sensor signal as a time stamp. The resulting value 19 thus forms a digital 16-bit number which contains both the sensed sensor information and information about the time of detection. The other sensor elements 15 differ only in the type of sensor 16, preferably other physical quantities with the other sensors 16 for safety reasons 00
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Vorzugsweise ist die Konsolidierungsvorrichtung 23 in der Bremspedalsensoreinrichtung 3, 4 angeordnet, so daß in den Bus 1 lediglich das vorverarbeitete Bremswunschsignal anstelle der einzelnen resultierenden Werte 19 der Sensorlemente 15 eingespeist werden. Hierdurch kann die Datenübertragungskapazität des Datenbusses 1 klein gehalten werden. Im Rahmen der Erfindung ist es jedoch auch möglich, die Konsolidierungseinrichtung im Zentralrechner 10 oder an einer jeden Radbremseinrichtung 7 vorzusehen.The consolidation device 23 is preferably arranged in the brake pedal sensor device 3, 4, so that only the preprocessed brake request signal is fed into the bus 1 instead of the individual resulting values 19 of the sensor elements 15. As a result, the data transmission capacity of the data bus 1 can be kept small. In the context of the invention, however, it is also possible to provide the consolidation device in the central computer 10 or on each wheel brake device 7.
Ein weiteres, vereinfachtes Ausführungsbeispiel der Bremspedalsensoreinrichtung 3, 4 ist in Fig. 3 gezeigt. Diese Bremspedalsensoreinrichtung weist im wesentlichen den gleichen Aufbau wie die in Fig. 2 gezeigte Vorrichtung auf, weshalb gleiche Teile mit gleichem Bezugszeichen versehen sind.A further, simplified exemplary embodiment of the brake pedal sensor device 3, 4 is shown in FIG. 3. This brake pedal sensor device has essentially the same structure as the device shown in FIG. 2, which is why the same parts are provided with the same reference numerals.
Diese Bremspedalsensoreinrichtung 3, 4 weist wiederum n Sensoren 16 auf, die alle zu einem vorbestimmten Takt gleichzeitig ausgelesen werden. Beim Auslesen der Sensoren 16 werden A/D-Wandler 17 von einem Taktsignal angesteuert, so daß sie gleichzeitig den jeweiligen an ihrer Eingangsseite anliegenden Analogwert in einen Digitalwert wandeln und an der Ausgangsseite ausgeben. Mit dem Taktsignal erzeugt ein Zähler 18 einen Zeitstempel.This brake pedal sensor device 3, 4 in turn has n sensors 16, all of which are read out simultaneously at a predetermined cycle. When reading out the sensors 16, A / D converters 17 are controlled by a clock signal, so that they convert the respective analog value present on their input side into a digital value and output it on the output side. A counter 18 generates a time stamp with the clock signal.
Die Sensorsignale der einzelnen Sensoren 16 werden, wie beim obigen Ausführungsbeispiel, in einer Auswerteeinheit 22 von einer Konsolidierungseinrichtung 23 und einer Votingeinrichtung 24 zu einem Bremswunschsignal verarbeitet. Erst diesem Bremswunschsignal wird der vom Zähler 18 erzeugte Zeitstempel für die weitere Übertragung im Datenbus 1 hinzugefügt.
Bei diesem Ausführungsbeispiel können bei einer weiteren Vereinfachung mehrere der A/D-Wandler 17 jeweils durch einen einzigen A/D-Wandler ersetzt werden, der den zugeordneten Sensoren 16 mit einem Multiplexer zum Auslesen eines Sensorsignals zugeschaltet wird. Gleichzeitig mit dem Auslesen der Sensorsignale wird ein Zeitstempel erzeugt. Bei dieser Ausführungsform wird jedes Sensorsignal einzeln in der Auswerteeinheit weiterverarbeitet und danach mit dem korrespondierenden Zeitstempel zusammengefügt.As in the above exemplary embodiment, the sensor signals of the individual sensors 16 are processed in an evaluation unit 22 by a consolidation device 23 and a voting device 24 to form a braking request signal. The time stamp generated by the counter 18 for the further transmission in the data bus 1 is only added to this braking request signal. In this exemplary embodiment, in a further simplification, a plurality of the A / D converters 17 can each be replaced by a single A / D converter, which is connected to the associated sensors 16 with a multiplexer for reading out a sensor signal. A time stamp is generated at the same time as the sensor signals are read out. In this embodiment, each sensor signal is individually processed in the evaluation unit and then combined with the corresponding time stamp.
Unabhängig von den oben erläuterten Ausführungsbeispielen erfolgt die Auswertung der Sensorsignale in der Auswerteeinheit nach folgenden Maßgaben:Irrespective of the exemplary embodiments explained above, the sensor signals are evaluated in the evaluation unit according to the following requirements:
Konsolidierung der Sensorsignale, d.h. Verknüpfung derConsolidation of the sensor signals, i.e. Linking the
Sensorsignale zu einem Bremswunschsignal;Sensor signals for a braking request signal;
Durchführung eines Voting, d.h. Lokalisierung undConducting a voting, i.e. Localization and
Maskierung fehlerhafter Sensoren;Masking faulty sensors;
Durchführung von Überwachungsroutinen, bspw. aufExecution of monitoring routines, for example
Grundlage von modellgestützten Fehlererkennungsmethoden der Sensorik und der Mechanik des Pedals;Basis of model-based error detection methods of the sensors and the mechanics of the pedal;
Durchführung von Plausibilitätsabfragen und entsprechenden Reaktionen;Implementation of plausibility queries and corresponding reactions;
Erkennen von Fehlerfällen der Synchronisierung.Detection of synchronization errors.
Die einzelnen Funktionen können auch auf andere Elemente als der Auswerteeinheit 22, wie z.B. dem Zentralrechner 10 oder den Radbremseinrichtungen 7, verteilt sein.The individual functions can also apply to elements other than the evaluation unit 22, such as the central computer 10 or the wheel brake devices 7.
Die Auswerteeinheit ist vorzugsweise redundant und fehlertolerant. Sie kann im Pedal integriert oder separat ausgeführt sein.
Bei den oben erörterten Ausführungsbeispielen arbeiten die Zähler 18 in einem, möglichst für die gesamte Vorrichtung zur Steuerung der Bremsanlage einheitlichen Takt, der bspw. durch einen oder mehrere Schwingquarze vorgegeben wird. Anstelle dieses "Quarztaktes" kann als Takt die Abtastrate, mit welcher die Sensoren 16 ausgelesen werden, verwendet werden, wobei bei jedem Auslesetakt der Zählerwert um eins erhöht wird.
The evaluation unit is preferably redundant and fault-tolerant. It can be integrated in the pedal or carried out separately. In the exemplary embodiments discussed above, the counters 18 operate in a cycle that is as uniform as possible for the entire device for controlling the brake system, which is predetermined, for example, by one or more quartz crystals. Instead of this "quartz clock", the sampling rate at which the sensors 16 are read out can be used as the clock, the counter value being increased by one for each reading clock.
Claims
Patentansprücheclaims
Vorrichtung zur Steuerung einer Bremsanlage eines Fahr zeuges, mit einem Bremspedal (5), einer Bremspedalsensoreinrichtung (3, 4) zumDevice for controlling a brake system of a vehicle, with a brake pedal (5), a brake pedal sensor device (3, 4) for
Erfassen einer Betätigung des Bremspedals (5) undDetecting an operation of the brake pedal (5) and
Ausgeben eines Bremspedalsignals (SI, S2), zumindest einer Radbremseinrichtung (7), die nachOutputting a brake pedal signal (SI, S2), at least one wheel brake device (7), which after
Maßgabe des Bremspedalsignals (SI, S2) betätigt wird, gekennzeichnet durch, eine Einrichtung zum Erzeugen und Hinzufügen einerProvided the brake pedal signal (SI, S2) is operated, characterized by a device for generating and adding a
Zeitreferenz an das Bremspedalsignal (SI, S2).Time reference to the brake pedal signal (SI, S2).
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zumindest zwei Bremspedalsensoreinrichtungen (3, 4; vorgesehen sind, die jeweils ein erstes bzw. zweite Bremssignal (SI, S2) erzeugen.Device according to claim 1, characterized in that at least two brake pedal sensor devices (3, 4; are provided, each of which generates a first or second brake signal (SI, S2).
Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Einrichtung zum Erzeugen und Hinzufügen einer Zeitreferenz derart angeordnet ist, daß beiden Bremspedalsignalen (SI, S2) eine Zeitreferenz hinzugefügt wird.Apparatus according to claim 2, characterized in that the device for generating and adding a time reference is arranged such that a time reference is added to both brake pedal signals (SI, S2).
Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Einrichtung zum Erzeugen und Hinzufügen einer Zeitreferenz derart angeordnet ist, daß die beiden Bremssignale zunächst zu einem Bremswunschsignal verarbeitet werden und diesem Bremswunschsignal eine Zeitreferenz hinzugefügt wird.
Apparatus according to claim 2, characterized in that the device for generating and adding a time reference is arranged such that the two brake signals are first processed into a brake request signal and a time reference is added to this brake request signal.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zumindest ein nicht synchronisierter Datenbus (1) zum Übertragen der Signale zwischen den Bremspedalsensoreinrichtungen (3, 4) und der zumindest einen Radbremseinrichtung (7) vorgesehen ist.5. Device according to one of claims 1 to 4, characterized in that at least one non-synchronized data bus (1) for transmitting the signals between the brake pedal sensor devices (3, 4) and the at least one wheel brake device (7) is provided.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Datenbus (1) ein ereignisgesteuerter Datenbus (1) ist.6. The device according to claim 5, characterized in that the data bus (1) is an event-controlled data bus (1).
7. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß mindestens ein zeitsynchronisierter Datenbus vorgesehen ist.7. Device according to one of claims 1 to 4, characterized in that at least one time-synchronized data bus is provided.
8. Vorrichtung nach Anspruch 5 und/oder 6, dadurch gekennzeichnet, daß die Zeitreferenz ein mittels eines Zählers (18) erzeugter Zeitstempel ist.8. The device according to claim 5 and / or 6, characterized in that the time reference is a time stamp generated by means of a counter (18).
9. Vorrichtung nach einem der Ansprüche 1 bis 8, gekennzeichnet durch einen Zentralrechner (10), der mit der Bremspedalsensoreinrichtung (3, 4) sowie den Radbremseinrichtungen (7) verbunden und mit diesen synchronisiert ist.9. Device according to one of claims 1 to 8, characterized by a central computer (10) which is connected to the brake pedal sensor device (3, 4) and the wheel brake devices (7) and is synchronized with them.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Zentralrechner (10) für das Bremsverhalten der Radbremseinrichtungen (7) charakteristische Bremssollwerte ausgibt, welche z.B. nach Maßgabe der momentanen Fahrgeschwindigkeit, der Fahrsituation, des Fahrbahnzustandes oder dgl. ausgegeben werden.
10. The device according to claim 9, characterized in that the central computer (10) for the braking behavior of the wheel brake devices (7) outputs characteristic braking setpoints, which are output for example in accordance with the current driving speed, the driving situation, the road condition or the like ..
11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Radbremseinrichtungen (7) jeweils einen mit der bzw. den Bremspedalsensoreinrichtungen (3, 4) synchronisierten Radmodulrechner aufweisen.11. The device according to one of claims 1 to 10, characterized in that the wheel brake devices (7) each have a with the or the brake pedal sensor devices (3, 4) synchronized wheel module computer.
12. Vorrichtung nach einem der Ansprüche 1 bis 11, gekennzeichnet durch einen oder mehrere weitere am Fahrzeug verteilt angeordnete Sensoreinrichtungen, wie z.B. eines Radsensors zum Feststellen, ob ein Rad während des Bremsens blockiert ist, wobei die Sensoreinrichtungen derart ausgebildet sind, daß dem erzeugten Sensorsignal jeweils eine Zeitreferenz hinzugefügt wird.12. The device according to one of claims 1 to 11, characterized by one or more further sensor devices arranged distributed on the vehicle, such as e.g. a wheel sensor for determining whether a wheel is blocked during braking, the sensor devices being designed such that a time reference is added to the sensor signal generated in each case.
13. Vorrichtung nach einem der Ansprüche 1 bis 12, gekennzeichnet durch eine globale Uhr (12) zum Synchronisieren der Einrichtungen zum Erzeugen und Hinzufügen der Zeitreferenz.13. Device according to one of claims 1 to 12, characterized by a global clock (12) for synchronizing the means for generating and adding the time reference.
14. Vorrichtung nach Anspruch 13 dadurch gekennzeichnet, daß die globale Uhr (12) fehlertolerant ausgeführt ist.14. The apparatus according to claim 13, characterized in that the global clock (12) is designed to be fault-tolerant.
15. Verfahren zur Steuerung einer Bremsanlage eines Fahrzeuges mit einer Vorrichtung nach den Ansprüchen 1 bis 14, wobei eine Bremspedalsensoreinrichtung eine Betätigung des Bremspedals erfaßt und ein Bremspedalsignal ausgibt, dem Bremspedalsignal eine Zeitreferenz hinzugefügt wird, und eine Radbremseinrichtung nach Maßgabe des Bremspedalsignals angesteuert wird, wobei die Zeitreferenz zur Überprüfung des Bremspedalsignals verwendet wird.
00 T -H15. A method for controlling a brake system of a vehicle with a device according to claims 1 to 14, wherein a brake pedal sensor device detects an actuation of the brake pedal and outputs a brake pedal signal, a time reference is added to the brake pedal signal, and a wheel brake device is controlled in accordance with the brake pedal signal, wherein the time reference is used to check the brake pedal signal. 00 T -H
00 g SO Φ Φ Cn . φ00 g SO Φ Φ Cn. φ
© -P XJ ß 3 £ ß Cn© -P XJ ß 3 £ ß Cn
00 φ 0 cd N N -H ß00 φ 0 cd N N -H ß
OS -P .3 x: XI φ 3OS -P .3 x: XI φ 3
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000517865A JP2001520958A (en) | 1997-10-29 | 1998-10-29 | Control device and method for brake device |
| EP98954460A EP1024983A1 (en) | 1997-10-29 | 1998-10-29 | Device and method for controlling a braking system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19747723.2 | 1997-10-29 | ||
| DE19747723 | 1997-10-29 | ||
| DE19822535.0 | 1998-05-19 | ||
| DE19822535A DE19822535B4 (en) | 1997-10-29 | 1998-05-19 | Device and method for controlling a brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999021744A1 true WO1999021744A1 (en) | 1999-05-06 |
Family
ID=26041172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1998/006848 WO1999021744A1 (en) | 1997-10-29 | 1998-10-29 | Device and method for controlling a braking system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1024983A1 (en) |
| JP (1) | JP2001520958A (en) |
| WO (1) | WO1999021744A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014067874A1 (en) * | 2012-11-01 | 2014-05-08 | Continental Teves Ag & Co. Ohg | Device and method for digitally transmitting a signal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426595A (en) * | 1992-01-07 | 1995-06-20 | Bureau D'etudes Fabrications Instrumentation De Controle | Portable autonomous device for the detection and recording of randomly occurring phenomena of short duration |
| DE19510525A1 (en) * | 1995-03-23 | 1996-09-26 | Bosch Gmbh Robert | Method and device for controlling or regulating the brake system of a vehicle |
| US5594646A (en) * | 1993-12-21 | 1997-01-14 | Aisin Aw Co., Ltd. | Method and apparatus for self-diagnosis for an electronic control system for vehicles |
| DE19617285C1 (en) * | 1996-04-30 | 1997-08-21 | Continental Ag | Operation of electrical brake system of motor vehicle |
-
1998
- 1998-10-29 WO PCT/EP1998/006848 patent/WO1999021744A1/en not_active Application Discontinuation
- 1998-10-29 EP EP98954460A patent/EP1024983A1/en not_active Ceased
- 1998-10-29 JP JP2000517865A patent/JP2001520958A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426595A (en) * | 1992-01-07 | 1995-06-20 | Bureau D'etudes Fabrications Instrumentation De Controle | Portable autonomous device for the detection and recording of randomly occurring phenomena of short duration |
| US5594646A (en) * | 1993-12-21 | 1997-01-14 | Aisin Aw Co., Ltd. | Method and apparatus for self-diagnosis for an electronic control system for vehicles |
| DE19510525A1 (en) * | 1995-03-23 | 1996-09-26 | Bosch Gmbh Robert | Method and device for controlling or regulating the brake system of a vehicle |
| DE19617285C1 (en) * | 1996-04-30 | 1997-08-21 | Continental Ag | Operation of electrical brake system of motor vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014067874A1 (en) * | 2012-11-01 | 2014-05-08 | Continental Teves Ag & Co. Ohg | Device and method for digitally transmitting a signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001520958A (en) | 2001-11-06 |
| EP1024983A1 (en) | 2000-08-09 |
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