EP2321162A1 - Brake system for motor vehicles - Google Patents

Brake system for motor vehicles

Info

Publication number
EP2321162A1
EP2321162A1 EP09780179A EP09780179A EP2321162A1 EP 2321162 A1 EP2321162 A1 EP 2321162A1 EP 09780179 A EP09780179 A EP 09780179A EP 09780179 A EP09780179 A EP 09780179A EP 2321162 A1 EP2321162 A1 EP 2321162A1
Authority
EP
European Patent Office
Prior art keywords
motor
voltage source
brake
brake system
board voltage
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.)
Withdrawn
Application number
EP09780179A
Other languages
German (de)
French (fr)
Inventor
Silke Scharmann
Roland Galbas
Jeannine Daubenschmid
Matthias Schanzenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
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 EP2321162A1 publication Critical patent/EP2321162A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—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
    • B60T8/404—Control of the pump unit
    • B60T8/405—Control of the pump unit involving the start-up phase

Definitions

  • the invention relates to a brake system for motor vehicles, comprising a pump for delivering brake fluid in a brake pressure line, a connectable to an on-board voltage source motor for driving the pump, and a control device for the motor.
  • the brake pressure line of such a brake system serves to provide the necessary brake pressure at the individual wheel cylinders.
  • the brake pressure is usually modulated by means of modulation valves which receive signals from an ABS or ESP control device (antilock brake system or electronic stability program) as a function of the rotational and slip states of the wheels. It is at certain intervals brake pressure from the ABS or ESP control device (antilock brake system or electronic stability program) as a function of the rotational and slip states of the wheels. It is at certain intervals brake pressure from the ABS or ESP control device (antilock brake system or electronic stability program) as a function of the rotational and slip states of the wheels. It is at certain intervals brake pressure from the ABS or ESP control device (antilock brake system or electronic stability program) as a function of the rotational and slip states of the wheels. It is at certain intervals brake pressure from the ABS or ESP control device (antilock brake system or electronic stability program) as a function of the rotational and slip states of the wheels. It is at certain intervals brake pressure from the ABS or
  • Brake pressure line introduced into the wheel cylinder held the brake pressure or brake fluid discharged into a reservoir to reduce the brake pressure.
  • the purpose of the pump is to reclaim the brake fluid from the reservoir into the brake pressure line, so that the brake pressure in the brake pressure line Wheel cylinders can be built at any time when needed.
  • the motor which drives this pump is also controlled by the control device and receives its drive energy from the on-board voltage source of the vehicle.
  • PEB Predictive Emergency Breaking
  • An active braking intervention with strong braking deceleration may, however, only be carried out when other possibilities for avoiding an accident, such as avoidance, are no longer possible.
  • a further requirement is that the assessment of the traffic situation on the basis of the signals of the sensors has a high degree of plausibility, so that it can be assumed with sufficient probability that the traffic situation has been assessed correctly and there is really an acute danger of collision.
  • the initiation and execution of emergency braking usually lasts only a very short period of time. It is therefore essential that in the case of such emergency braking the pressure in the wheel brake cylinders can be built up very quickly. In other words, it is a high pressure build-up dynamics needed so that the brakes can develop their maximum effectiveness with the least possible delay.
  • the pressure is built up using the pump of the ESP unit and / or with the aid of active booster.
  • the object of the invention is to provide a brake system in which by simple means a higher pressure build-up dynamics can be achieved.
  • the nominal voltage which usually coincides with the voltage of the on-board battery of the motor vehicle, can be significantly exceeded in the short term, resulting in a corresponding increase in drive power without the increased voltage to destruction or damage to the engine. Since the high pressure build-up dynamics is only needed in acute emergencies, it can also be justified to increase the voltage to values that would lead to a significant decrease in the service life of the engine during continuous operation.
  • the invention requires only comparatively minor modifications to a conventional brake system, namely essentially only the provision of an energy storage and a corresponding modification of the control device. Expensive aggregates such as active boosters or hydraulic accumulators and the like are not needed. This not only leads to cost savings, but due to the low complexity of the brake system also to a higher reliability.
  • the energy store may be one or more capacitors or auxiliary batteries or combinations of both. In the case of multiple capacitors and / or additional batteries, these can be connected in parallel or in series or form a network of parallel and series circuits.
  • the energy storage device can also be connected in series or in parallel to the on-board voltage source.
  • Fig. 1 is a block diagram of a brake system according to the invention
  • Fig. 2 and 3 alternative electrical circuits for the brake system of Fig. 1;
  • FIG. 4 shows a circuit diagram for a brake system according to a further embodiment
  • FIG. 5 and 6 are circuit diagrams of a brake system according to a further embodiment in different operating states; and Fig. 7 and 8 circuit diagrams for yet another
  • Embodiment of the brake system in different operating states Embodiment of the brake system in different operating states.
  • the brake system shown in Fig. 1 has a brake pressure line 10 which is connected via respective modulation valves 12 to individual wheel brake cylinder 14 of the vehicle (in the drawing, only a single wheel brake cylinder is shown).
  • a surge tank 16 is also connected to the brake pressure line 10 to compensate for pressure fluctuations.
  • the brake pressure line 10 can be connected to the wheel brake cylinder 14 so that brake pressure is built up in the brake cylinder. Likewise, the connection can be separated, so that the brake pressure is maintained in the brake cylinder, or the wheel brake cylinder 14 can be connected to a return line 18, so that brake fluid is discharged through the return line into a sump 20 and thus the brake pressure in the wheel cylinder is reduced.
  • a pump 22 is driven by an electric motor 24 and serves to reclaim the brake fluid from the reservoir 20 in the brake pressure line 10, so that in this brake pressure line always the necessary pressure is maintained.
  • the pump 22 is operated only at intervals, during a braking operation introduced into the wheel brake fluid or after a Braking to replace the drained via the return line 18 brake fluid.
  • An electronic control device 26 includes in the example shown, an electronic driving stabilization and anti-lock braking system (ESP / ABS) 28, which controls the modulation valves 12 based on the signals from wheel speed sensors and other sensors, not shown.
  • ESP / ABS electronic driving stabilization and anti-lock braking system
  • To the control device 26 further includes a switch 30 which is controlled by the ESP / ABS system 28 and serves to connect the motor 24 to an on-board voltage source 32 (the vehicle battery) to put the pump 22 into operation (switch position "b"). in Fig. 1) or to disconnect the motor from the on-board voltage source and thus to switch off the pump (switch position "a").
  • the brake system is activated by the driver of the vehicle via the brake pedal.
  • the brake pressure line 10 is connected in a known manner to a brake cylinder or brake booster, not shown here.
  • the control device 26 is supplemented by a so-called PEB system 34 (Predictive Emergency Breaking), which is able to automatically trigger an emergency braking in certain traffic situations which are detected by a sensor, not shown.
  • PEB system 34 Predictive Emergency Breaking
  • the PEB system issues a command to the ESP / ABS system 28, which then activates the pump 22 and opens the modulation valves 12 to pressurize the wheel brake cylinders 14. Since the braking force should be effective as soon as possible in an emergency situation, it is important that the wheel brake cylinder 14 can be filled very quickly with brake fluid and thus the brake pressure can be built up very quickly. This is the normal performance of the motor 24 and the pump 22 often insufficient. For this reason, the brake system described here additionally has an electrical energy store, which is formed in FIG. 1 by an additional battery 36.
  • the already mentioned switch 30 has a third switching position "c", in which it connects the motor 24 with the auxiliary battery 36. Therefore, when the PEB system 34 issues the command for emergency braking, the ESP / ABS system 28 sets the switch 30 to the switch position "c" so that the motor 24 is powered from the auxiliary battery 36. In the example shown here, the motor is then disconnected from the regular vehicle battery, that is, the onboard voltage source 32. However, the auxiliary battery 36 has a higher voltage, so that the motor 24 is applied to a higher voltage, for example, 18 V instead of the usual 12 V, and accordingly drives the pump 22 with higher power. In this way, the pressure in the wheel brake cylinder 14 can be built up with considerably higher dynamics.
  • Fig. 2 shows a circuit for a modified
  • Fig. 3 shows an example in which during the emergency braking operation, in the position "c" of the switch 30, the on-board voltage source 32 and the auxiliary battery 36 are connected in series.
  • the output voltage of the auxiliary battery 36 may be lower or higher than that of the on-board voltage source.
  • FIGS. 4 to 8 show embodiments in which the energy store is not formed by an additional battery but by a capacitor 38, preferably a double-layer capacitor (DLC).
  • a capacitor 38 preferably a double-layer capacitor (DLC).
  • the motor 24 is connected via the switch 30 either to the on-board voltage source 32 (switch position "b") or to the capacitor 38 (switch position "c").
  • the switch-off position "a” is here for the sake of simplicity not shown.
  • the switch 30 in this case has two mutually coupled switching elements 30 (a) and 30 (b).
  • the on-board voltage source 32 is formed as usual by the vehicle battery, which is charged by means of an alternator 40 of the vehicle.
  • the capacitor 38 is connected to the on-board voltage source 32 via the switching element 30 (b) and a DC / DC converter 42, which converts the output voltage of the vehicle battery into a higher charging voltage of the capacitor 38.
  • the switch 30 is switched to position "c"
  • the capacitor 38 discharges, so that a higher operating voltage is available for the motor 24.
  • the capacitance of the capacitor 38 should be so high that the voltage of this capacitor, while discharging via the motor 24, does not decrease too much over the duration of the emergency braking operation, or at any rate decreases more significantly only when the full brake pressure is built up.
  • FIG 5 and 6 show an embodiment in which the capacitor 38 is connected in series with the on-board voltage source 32 during the emergency braking operation and in which no DC / DC converter is required.
  • the switch 30 in this case has three mutually coupled switching elements 30 (a), 30 (b) and 30 (c).
  • the switch is in the switching position "b", in which the motor 24 via the switching member 30 (a) is connected only to the on-board voltage source 32.
  • the capacitor 38 is connected in this switching position via the switching element 30b parallel to the motor 24 to the on-board voltage source 32, and its other electrode is grounded via the switching member 30 (c), so that the capacitor is charged to the voltage of the on-board voltage source 32 and then held at this voltage.
  • the switching member 30 (b) When switching to the switching position "c" shown in FIG. 6, the switching member 30 (b) is opened, and the switching member 30 (c) no longer connects the capacitor 38 to ground, but to the on-board voltage source 32, so that the Potential of the capacitor 38 is raised in total by the voltage of the on-board voltage source 32.
  • the switching element 30 (a) By way of the switching element 30 (a), therefore, the motor 24 now has twice the output voltage of the on-board voltage source 32.
  • the current flowing through the motor 24 is the discharge current of the capacitor 38. Therefore, also here, the capacitor should have a relatively high capacity.
  • FIG. 7 and 8 show an example in which the on-board voltage source 32 and the capacitor 38 are also connected in series during the emergency braking operation, but in which the charging voltage of the capacitor 38 can be additionally increased by means of the DC / DC converter 42.
  • the motor 24 is connected via the switching element 30 (a) only to the on-board voltage source 32, while the capacitor 38 is earthed via the switching element 30 (c) and via the DC / DC converter 42 and that the switching element 30 (b) is charged.
  • the capacitor 38 discharges via the switching element 30 (a), while its potential is raised by the switching element 30 (c) to the output voltage of the on-board voltage source 32.

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

Abstract

Brake system for motor vehicles, with a pump (22) for conveying brake fluid to a brake pressure line (10), a motor (24) that can be connected to an on-board voltage source (32) for driving the pump (22), and a control device (26) for the motor, characterized in that in addition to the on-board voltage source (32) an electric energy storage medium (36; 38) is provided and that the control device (26) is designed to connect the motor (24) temporarily to the energy storage medium (36; 38). The energy storage medium can be an additional battery (36) or a capacitor (38).

Description

Beschreibungdescription
Titeltitle
Bremsanlaαe für KraftfahrzeugeBrake system for motor vehicles
Stand der TechnikState of the art
Die Erfindung betrifft eine Bremsanlage für Kraftfahrzeuge, mit einer Pumpe zum Fördern von Bremsflüssigkeit in eine Bremsdruckleitung, einem an eine Bordspannungsquelle anschließbaren Motor zum Antrieb der Pumpe, und einer Steuereinrichtung für den Motor.The invention relates to a brake system for motor vehicles, comprising a pump for delivering brake fluid in a brake pressure line, a connectable to an on-board voltage source motor for driving the pump, and a control device for the motor.
Die Bremsdruckleitung einer solchen Bremsanlage dient dazu, an den einzelnen Radzylindern den nötigen Bremsdruck bereitzustellen. An den Radzylindern wird der Bremsdruck zumeist mit Hilfe von Modulationsventilen, die Signale von einer ABS- oder ESP-Steuereinrichtung (Antiblockiersystem bzw. elektronisches Stabilitätsprogramm) erhalten, in Abhängigkeit von den Dreh- und Schlupfzuständen der Räder moduliert. Dabei wird in bestimmten Intervallen Bremsdruck aus derThe brake pressure line of such a brake system serves to provide the necessary brake pressure at the individual wheel cylinders. At the wheel cylinders, the brake pressure is usually modulated by means of modulation valves which receive signals from an ABS or ESP control device (antilock brake system or electronic stability program) as a function of the rotational and slip states of the wheels. It is at certain intervals brake pressure from the
Bremsdruckleitung in die Radzylinder eingeleitet, der Bremsdruck gehalten oder Bremsflüssigkeit in einen Sammelbehälter abgelassen, um den Bremsdruck abzubauen. Die Pumpe hat den Zweck, die Bremsflüssigkeit aus dem Sammelbehälter in die Bremsdruckleitung zurückzufordern, damit der Bremsdruck in den Radzylindern jederzeit bei Bedarf aufgebaut werden kann. Der Motor, der diese Pumpe antreibt, wird ebenfalls von der Steuereinrichtung gesteuert und erhält seine Antriebsenergie von der Bordspannungsquelle des Fahrzeugs.Brake pressure line introduced into the wheel cylinder, held the brake pressure or brake fluid discharged into a reservoir to reduce the brake pressure. The purpose of the pump is to reclaim the brake fluid from the reservoir into the brake pressure line, so that the brake pressure in the brake pressure line Wheel cylinders can be built at any time when needed. The motor which drives this pump is also controlled by the control device and receives its drive energy from the on-board voltage source of the vehicle.
Kraftfahrzeuge werden heute zunehmend mit aktiven Sicherheitssystemen ausgerüstet, die mit einer geeigneten Sensorik, beispielsweise mit Radarsensoren, das Verkehrsumfeld überwachen und erforderlichenfalls aktiv in die Fahrzeugführung eingreifen, um eine bevorstehende Kollision möglichst noch abzuwenden oder zumindest die Folgen der Kollision zu mildern. Ein Beispiel eines solchen Sicherheitssystems ist ein sogenannten PEB-System (Predictive Emergency Breaking) , mit dem eine aktive Notbremsung eingeleitet werden kann, wenn von der Sensorik eine unmittelbare Kollisionsgefahr erkannt wird.Motor vehicles are now increasingly equipped with active safety systems that monitor the traffic environment with an appropriate sensor, for example with radar sensors, and if necessary actively intervene in the vehicle to avert an impending collision as possible or at least to mitigate the consequences of the collision. An example of such a safety system is a so-called PEB system (Predictive Emergency Breaking), with which an active emergency braking can be initiated if an immediate danger of collision is detected by the sensor system.
Ein aktiver Bremseingriff mit starker Bremsverzögerung (aktive Notbremsung) darf jedoch erst dann durchgeführt werden, wenn andere Möglichkeiten zur Unfallvermeidung, wie etwa ein Ausweichen, nicht mehr möglich sind. Eine weitere Voraussetzung ist, daß die Bewertung der Verkehrssituation anhand der Signale der Sensorik eine hohe Plausibilität hat, so daß mit hinreichend hoher Wahrscheinlichkeit davon ausgegangen werden kann, daß die Verkehrssituation zutreffend bewertet wurde und wirklich akute Kollisionsgefahr besteht. Unter diesen Bedingungen bleibt zur Einleitung und Ausführung der Notbremsung zumeist nur eine sehr kurze Zeitspanne. Es ist deshalb wesentlich, daß im Falle einer solchen Notbremsung der Druck in den Radbremszylindern sehr schnell aufgebaut werden kann. Mit anderen Worten, es wird eine hohe Druckaufbaudynamik benötigt, damit die Bremsen mit möglichst geringer Verzögerung ihre maximale Wirksamkeit entfalten können. Zur Verbesserung der Druckaufbaudynamik bzw. zur Verkürzung der sogenannten Schwellzeiten in Notbremssituationen werden bisher hydraulische Verfahren eingesetzt, insbesondere eine sogenannte Bremsvorbefüllung . Dabei wird schon zu einem Zeitpunkt, an dem die Einleitung einer Notbremsung wahrscheinlich ist, aber die letzte Entscheidung noch nicht getroffen ist, vorbeugend der Bremsdruck erhöht, jedoch nur bis zu der Schwelle, bei der tatsächlich eine Bremsverzögerung einsetzt. Wenn dann wirklich eine Notbremsung ausgelöst werden muß, kann dann der maximale Bremsdruck schneller erreicht werden.An active braking intervention with strong braking deceleration (active emergency braking) may, however, only be carried out when other possibilities for avoiding an accident, such as avoidance, are no longer possible. A further requirement is that the assessment of the traffic situation on the basis of the signals of the sensors has a high degree of plausibility, so that it can be assumed with sufficient probability that the traffic situation has been assessed correctly and there is really an acute danger of collision. Under these conditions, the initiation and execution of emergency braking usually lasts only a very short period of time. It is therefore essential that in the case of such emergency braking the pressure in the wheel brake cylinders can be built up very quickly. In other words, it is a high pressure build-up dynamics needed so that the brakes can develop their maximum effectiveness with the least possible delay. To improve the pressure build-up dynamics or to shorten the so-called swelling times in emergency braking situations, hydraulic methods have hitherto been used, in particular a so-called brake pre-filling. It is already at a time when the initiation of emergency braking is likely, but the last decision has not been made, preventively increases the brake pressure, but only up to the threshold at which actually sets a braking deceleration. If then really emergency braking must be triggered, then the maximum brake pressure can be reached faster.
Der Druckaufbau erfolgt mit Hilfe der Pumpe des ESP-Aggregats und/oder mit Hilfe aktiver Booster.The pressure is built up using the pump of the ESP unit and / or with the aid of active booster.
Mit diesen Maßnahmen läßt sich jedoch nur eine begrenzte Druckaufbaudynamik erreichen. Bessere Resultate erreicht man durch den Einsatz von Systemen, bei denen zusätzlicher Bremsdruck mit Hilfe von hydraulischen Druckspeichern bereitgestellt werden kann.tSolche Systems sind jedoch sehr teuer und technisch sehr anspruchsvoll.With these measures, however, only a limited pressure build-up dynamics can be achieved. Better results can be achieved by using systems that can provide additional brake pressure with the aid of hydraulic accumulators. However, such systems are very expensive and technically very demanding.
Offenbarung der ErfindungDisclosure of the invention
Aufgabe der Erfindung ist es, eine Bremsanlage zu schaffen, bei der mit einfachen Mitteln eine höhere Druckaufbaudynamik erreicht werden kann.The object of the invention is to provide a brake system in which by simple means a higher pressure build-up dynamics can be achieved.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zusätzlich zu der Bordspannungsquelle ein elektrischer Energiespeicher vorgesehen ist und daß die Steuereinrichtung dazu ausgebildet ist, den Motor zeitweise an den Energiespeicher anzuschließen . - A -This object is achieved in that in addition to the on-board voltage source, an electrical energy storage is provided and that the control device is adapted to temporarily connect the motor to the energy storage. - A -
Bei der erfindungsgemäßen Bremsanlage wird somit eine höhere Druckaufbaudynamik dadurch erreicht, daß der die Pumpe antreibenden Motor im Bedarfsfall an einen Energiespeicher angeschlossen wird, so daß eine höhere Betriebsspannung für den Motor zur Verfügung steht und damit die Pumpenförderleistung erhöht wird.In the brake system according to the invention thus a higher pressure build-up dynamics is achieved in that the motor driving the pump is connected to an energy storage when needed, so that a higher operating voltage for the motor is available and thus the pump delivery rate is increased.
Insbesondere wird dabei der Umstand ausgenutzt, daß bei einem elektrischen Antriebsmotor für eine Pumpe die Nennspannung, die üblicherweise mit der Spannung der Bordbatterie des Kraftfahrzeugs übereinstimmt, kurzfristig deutlich überschritten werden kann, was zu einer entsprechenden Steigerung der Antriebsleistung führt, ohne daß die erhöhte Spannung zu einer Zerstörung oder Beschädigung des Motors führt. Da die hohe Druckaufbaudynamik nur in akuten Notsituationen benötigt wird, kann es dabei auch gerechtfertigt sein, die Spannung auf Werte zu erhöhen, die bei Dauerbetrieb zu einer deutlichen Abnahme der Lebensdauer des Motors führen würden.In particular, the fact is exploited that in an electric drive motor for a pump, the nominal voltage, which usually coincides with the voltage of the on-board battery of the motor vehicle, can be significantly exceeded in the short term, resulting in a corresponding increase in drive power without the increased voltage to destruction or damage to the engine. Since the high pressure build-up dynamics is only needed in acute emergencies, it can also be justified to increase the voltage to values that would lead to a significant decrease in the service life of the engine during continuous operation.
Die Erfindung erfordert nur vergleichsweise geringe Modifikationen an einer herkömmlichen Bremsanlage, nämlich im wesentlichen nur die Bereitstellung eines Energiespeichers sowie eine entsprechende Modifikation der Steuereinrichtung. Kostspielige Aggregate wie aktive Booster oder hydraulische Speicher und dergleichen werden nicht benötigt. Dies führt nicht nur zu Kosteneinsparungen, sondern aufgrund der geringen Komplexität der Bremsanlage auch zu einer höheren Funktionssicherheit .The invention requires only comparatively minor modifications to a conventional brake system, namely essentially only the provision of an energy storage and a corresponding modification of the control device. Expensive aggregates such as active boosters or hydraulic accumulators and the like are not needed. This not only leads to cost savings, but due to the low complexity of the brake system also to a higher reliability.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben. Bei dem Energiespeicher kann es sich um einen oder mehrere Kondensatoren oder Zusatzbatterien oder Kombinationen von beidem handeln. Im Fall mehrerer Kondensatoren und/oder Zusatzbatterien können diese parallel oder in Serie geschaltet oder auch ein Netzwerk aus Parallel- und Serienschaltungen bilden. Der Energiespeicher kann außerdem wahlweise in Reihe oder parallel zu der Bordspannungsquelle geschaltet sein.Advantageous embodiments of the invention are specified in the subclaims. The energy store may be one or more capacitors or auxiliary batteries or combinations of both. In the case of multiple capacitors and / or additional batteries, these can be connected in parallel or in series or form a network of parallel and series circuits. The energy storage device can also be connected in series or in parallel to the on-board voltage source.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert .Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Es zeigen:Show it:
Fig. 1 ein Blockdiagramm einer erfindungsgemäßen Bremsanlage;Fig. 1 is a block diagram of a brake system according to the invention;
Fig. 2 und 3 alternative elektrische Schaltungen für die Bremsanlage nach Fig. 1;Fig. 2 and 3 alternative electrical circuits for the brake system of Fig. 1;
Fig. 4 eine Schaltskizze für eine Bremsanlage gemäß einem weiteren Ausführungsbeispiel;4 shows a circuit diagram for a brake system according to a further embodiment;
Fig. 5 und 6 Schaltskizzen einer Bremsanlage gemäß einem weiteren Ausführungsbeispiel in unterschiedlichen Betriebszuständen; und Fig. 7 und 8 Schaltskizzen für noch ein weiteres5 and 6 are circuit diagrams of a brake system according to a further embodiment in different operating states; and Fig. 7 and 8 circuit diagrams for yet another
Ausführungsbeispiel der Bremsanlage in unterschiedlichen Betriebszuständen .Embodiment of the brake system in different operating states.
Ausführungsformen der ErfindungEmbodiments of the invention
Die in Fig. 1 gezeigte Bremsanlage weist eine Bremsdruckleitung 10 auf, die über jeweilige Modulationsventile 12 an einzelne Radbremszylinder 14 des Fahrzeugs angeschlossen ist (in der Zeichnung ist nur ein einzelner Radbremszylinder gezeigt) .The brake system shown in Fig. 1 has a brake pressure line 10 which is connected via respective modulation valves 12 to individual wheel brake cylinder 14 of the vehicle (in the drawing, only a single wheel brake cylinder is shown).
Im gezeigten Beispiel ist an die Bremsdruckleitung 10 außerdem ein Ausgleichsbehälter 16 zum Ausgleich von Druckschwankungen angeschlossen .In the example shown, a surge tank 16 is also connected to the brake pressure line 10 to compensate for pressure fluctuations.
Über das Modulationsventil 12 kann die Bremsdruckleitung 10 mit dem Radbremszylinder 14 verbunden werden, so daß Bremsdruck im Bremszylinder aufgebaut wird. Ebenso kann die Verbindung getrennt werden, so daß der Bremsdruck im Bremszylinder gehalten wird, oder der Radbremszylinder 14 kann mit einer Rücklaufleitung 18 verbunden werden, so daß Bremsflüssigkeit über die Rücklaufleitung in einen Sammelbehälter 20 abgelassen wird und somit der Bremsdruck im Radzylinder abgebaut wird.About the modulation valve 12, the brake pressure line 10 can be connected to the wheel brake cylinder 14 so that brake pressure is built up in the brake cylinder. Likewise, the connection can be separated, so that the brake pressure is maintained in the brake cylinder, or the wheel brake cylinder 14 can be connected to a return line 18, so that brake fluid is discharged through the return line into a sump 20 and thus the brake pressure in the wheel cylinder is reduced.
Eine Pumpe 22 wird durch einen elektrischen Motor 24 angetrieben und dient dazu, die Bremsflüssigkeit aus dem Sammelbehälter 20 in die Bremsdruckleitung 10 zurückzufordern, so daß in dieser Bremsdruckleitung stets der nötige Druck aufrechterhalten wird. In der Praxis wird die Pumpe 22 nur intervallweise betrieben, um während eines Bremsvorgangs die in die Radbremszylinder eingeleitete Flüssigkeit oder nach einem Bremsvorgang die über die Rücklaufleitung 18 abgelassene Bremsflüssigkeit zu ersetzen.A pump 22 is driven by an electric motor 24 and serves to reclaim the brake fluid from the reservoir 20 in the brake pressure line 10, so that in this brake pressure line always the necessary pressure is maintained. In practice, the pump 22 is operated only at intervals, during a braking operation introduced into the wheel brake fluid or after a Braking to replace the drained via the return line 18 brake fluid.
Eine elektronische Steuereinrichtung 26 umfaßt im gezeigten Beispiel ein elektronisches Fahrstabilisierungs- und Antiblockiersystem (ESP/ABS) 28, das anhand der Signale von nicht gezeigten Raddrehzahlfühlern und anderen Meßaufnehmern die Modulationsventile 12 ansteuert. Zu der Steuereinrichtung 26 gehört weiterhin ein Schalter 30, der vom ESP/ABS-System 28 gesteuert wird und dazu dient, den Motor 24 an eine Bordspannungsquelle 32 (die Fahrzeugbatterie) anzuschließen, um die Pumpe 22 in Betrieb zu setzen (Schaltstellung "b" in Fig. 1) oder den Motor von der Bordspannungsquelle zu trennen und damit die Pumpe abzuschalten (Schaltstellung "a") .An electronic control device 26 includes in the example shown, an electronic driving stabilization and anti-lock braking system (ESP / ABS) 28, which controls the modulation valves 12 based on the signals from wheel speed sensors and other sensors, not shown. To the control device 26 further includes a switch 30 which is controlled by the ESP / ABS system 28 and serves to connect the motor 24 to an on-board voltage source 32 (the vehicle battery) to put the pump 22 into operation (switch position "b"). in Fig. 1) or to disconnect the motor from the on-board voltage source and thus to switch off the pump (switch position "a").
Im Normalfall wird die Bremsanlage vom Fahrer des Fahrzeugs über das Bremspedal aktiviert. Dazu ist die Bremsdruckleitung 10 in bekannter Weise an einen hier nicht gezeigten Bremszylinder oder Bremskraftverstärker angeschlossen.Normally, the brake system is activated by the driver of the vehicle via the brake pedal. For this purpose, the brake pressure line 10 is connected in a known manner to a brake cylinder or brake booster, not shown here.
Im hier gezeigten Beispiel ist die Steuereinrichtung 26 jedoch um ein sogenanntes PEB-System 34 (Predictive Emergency Breaking) ergänzt, das in der Lage ist, in bestimmten Verkehrssituationen, die von einer nicht gezeigten Sensorik erkannt werden, automatisch eine Notbremsung auszulösen. Dazu gibt das PEB- System einen Befehl an das ESP/ABS-System 28, das daraufhin die Pumpe 22 aktiviert und die Modulationsventile 12 öffnet, um die Radbremszylinder 14 mit Druck zu beaufschlagen. Da in einer Notsituation die Bremskraft möglichst rasch wirksam werden sollte, ist es wichtig, daß die Radbremszylinder 14 sehr schnell mit Bremsflüssigkeit gefüllt werden können und somit der Bremsdruck sehr rasch aufgebaut werden kann. Dazu wird die normale Leistung des Motors 24 und der Pumpe 22 oft nicht ausreichen. Aus diesem Grund weist die hier beschriebene Bremsanlage zusätzlich einen elektrischen Energiespeicher auf, der in Fig. 1 durch eine Zusatzbatterie 36 gebildet wird.In the example shown here, however, the control device 26 is supplemented by a so-called PEB system 34 (Predictive Emergency Breaking), which is able to automatically trigger an emergency braking in certain traffic situations which are detected by a sensor, not shown. To do this, the PEB system issues a command to the ESP / ABS system 28, which then activates the pump 22 and opens the modulation valves 12 to pressurize the wheel brake cylinders 14. Since the braking force should be effective as soon as possible in an emergency situation, it is important that the wheel brake cylinder 14 can be filled very quickly with brake fluid and thus the brake pressure can be built up very quickly. This is the normal performance of the motor 24 and the pump 22 often insufficient. For this reason, the brake system described here additionally has an electrical energy store, which is formed in FIG. 1 by an additional battery 36.
Der bereits erwähnte Schalter 30 hat eine dritte Schaltstellung "c", in der er den Motor 24 mit der Zusatzbatterie 36 verbindet. Wenn das PEB-System 34 den Befehl für eine Notbremsung gibt, stellt daher das ESP/ABS-System 28 den Schalter 30 in die Schaltstellung "c", so daß der Motor 24 aus der Zusatzbatterie 36 gespeist wird. In dem hier gezeigten Beispiel ist der Motor dann von der regulären Fahrzeugbatterie, also der Bordspannungsquelle 32 getrennt. Die Zusatzbatterie 36 hat jedoch eine höhere Spannung, so daß der Motor 24 mit einer höheren Spannung beaufschlagt wird, beispielsweise mit 18 V statt mit den üblichen 12 V, und dementsprechend die Pumpe 22 mit höherer Leistung antreibt. Auf diese Weise kann der Druck in dem Radbremszylinder 14 mit beträchtlich höherer Dynamik aufgebaut werden.The already mentioned switch 30 has a third switching position "c", in which it connects the motor 24 with the auxiliary battery 36. Therefore, when the PEB system 34 issues the command for emergency braking, the ESP / ABS system 28 sets the switch 30 to the switch position "c" so that the motor 24 is powered from the auxiliary battery 36. In the example shown here, the motor is then disconnected from the regular vehicle battery, that is, the onboard voltage source 32. However, the auxiliary battery 36 has a higher voltage, so that the motor 24 is applied to a higher voltage, for example, 18 V instead of the usual 12 V, and accordingly drives the pump 22 with higher power. In this way, the pressure in the wheel brake cylinder 14 can be built up with considerably higher dynamics.
Da der Notbremsvorgang im allgemeinen nur wenige Sekunden dauern wird, kann alsbald in die Schaltstellung "b" oder "a" zurückgeschaltet werden, so daß trotz der erhöhten Spannung keine Schädigung des Motors 24 eintritt.Since the emergency braking process will generally take only a few seconds, can be switched back into the switching position "b" or "a" soon, so that despite the increased voltage no damage to the motor 24 occurs.
Da bei dem in Fig. 1 gezeigten Ausführungsbeispiel der Motor 24 entweder nur aus der Bordspannungsquelle 32 oder nur aus der Zusatzbatterie 36 gespeist wird, kann die Spannung der Zusatzbatterie 36 höher gewählt werden als die der Bordspannungsquelle. Außerdem ist bei dieser Anlage die Spannungsversorgung des Motors 24 während des Notbremsvorgangs unabhängig von etwaigen Schwankungen der Bordnetzspannung. Fig. 2 zeigt eine Schaltung für eine modifizierteSince in the embodiment shown in Fig. 1, the motor 24 is fed either only from the on-board voltage source 32 or only from the auxiliary battery 36, the voltage of the auxiliary battery 36 can be selected higher than that of the on-board voltage source. In addition, in this system, the power supply of the motor 24 during the emergency braking process regardless of any fluctuations in the vehicle electrical system voltage. Fig. 2 shows a circuit for a modified
Ausführungsform, bei der während des NotbremsVorgangs, wenn sich der Schalter 30 in der hier dargestellten Schaltstellung "c" befindet, die Bordspannungsquelle 32 und die Zusatzbatterie 36 parallel zueinander geschaltet sind. In diesem Fall sollte zwar die Ausgangsspannung der Zusatzbatterie 36 nicht höher sein als die der Bordspannungsquelle, doch wird durch die Parallelschaltung der Innenwiderstand der Spannungsversorgung als ganzes gesenkt, so daß sich bei gegebenem Stromfluß durch den Motor 24, insbesondere bei niedrigem Ladezustand der Fahrzeugbatterie, ein höherer Spannungsabfall am Motor ergibt.Embodiment in which during the emergency braking operation, when the switch 30 is in the switching position "c" shown here, the on-board voltage source 32 and the auxiliary battery 36 are connected in parallel with each other. In this case, although the output voltage of the auxiliary battery 36 should not be higher than that of the on-board voltage source, but is reduced by the parallel circuit, the internal resistance of the power supply as a whole, so that at given current flow through the motor 24, especially at low state of charge of the vehicle battery, a higher voltage drop at the motor results.
Fig. 3 zeigt ein Beispiel, bei dem während des NotbremsVorgangs, in der Stellung "c" des Schalters 30, die Bordspannungsquelle 32 und die Zusatzbatterie 36 in Serie geschaltet sind. In diesem Fall kann die Ausgangsspannung der Zusatzbatterie 36 niedriger oder höher sein als die der Bordspannungsquelle .Fig. 3 shows an example in which during the emergency braking operation, in the position "c" of the switch 30, the on-board voltage source 32 and the auxiliary battery 36 are connected in series. In this case, the output voltage of the auxiliary battery 36 may be lower or higher than that of the on-board voltage source.
In Fig. 2 und 3 ist in der Schaltstellung "b" der Motor 24 nur mit der Bordspannungsquelle 32 verbunden, und in der Schaltstellung "a" ist der Motor 24 ganz abgeschaltet.In Fig. 2 and 3, in the switching position "b" of the motor 24 is connected only to the on-board voltage source 32, and in the switching position "a", the motor 24 is completely switched off.
In Fig. 4 bis 8 sind Ausführungsformen dargestellt, bei denen der Energiespeicher nicht durch eine Zusatzbatterie, sondern durch einen Kondensator 38 gebildet wird, vorzugsweise einen Doppelschichtkondensator (DLC; Double Layer Capacitor) .FIGS. 4 to 8 show embodiments in which the energy store is not formed by an additional battery but by a capacitor 38, preferably a double-layer capacitor (DLC).
In dem in Fig. 4 gezeigten Beispiel ist der Motor 24 über den Schalter 30 entweder mit der Bordspannungsquelle 32 verbunden (Schaltstellung "b") oder mit dem Kondensator 38 (Schaltstellung "c") . Die Ausschaltstellung "a" ist hier der Einfachheit halber nicht dargestellt. Der Schalter 30 hat in diesem Fall zwei miteinander gekoppelte Schaltglieder 30 (a) und 30 (b) .In the example shown in FIG. 4, the motor 24 is connected via the switch 30 either to the on-board voltage source 32 (switch position "b") or to the capacitor 38 (switch position "c"). The switch-off position "a" is here for the sake of simplicity not shown. The switch 30 in this case has two mutually coupled switching elements 30 (a) and 30 (b).
Die Bordspannungsquelle 32 wird wie üblich durch die Fahrzeugbatterie gebildet, die mit Hilfe einer Lichtmaschine 40 des Fahrzeugs aufgeladen wird. In der Schaltstellung "b" ist der Kondensator 38 ist mit der Bordspannungsquelle 32 über das Schaltglied 30 (b) und einen DC/DC-Wandler 42 verbunden, der die Ausgangsspannung der Fahrzeugbatterie in eine höhere Ladespannung des Kondensators 38 umsetzt. Wenn bei einem Notbremsvorgang der Schalter 30 auf die Stellung "c" umgeschaltet wird, so entlädt sich der Kondensator 38, so daß eine höhere Betriebsspannung für den Motor 24 zur Verfügung steht. Die Kapazität des Kondensators 38 sollte so groß sein, daß die Spannung dieses Kondensators, während er sich über den Motor 24 entlädt, über die Dauer des Notbremsvorgangs nicht zu stark abnimmt oder jedenfalls erst dann deutlicher abnimmt, wenn der volle Bremsdruck aufgebaut ist.The on-board voltage source 32 is formed as usual by the vehicle battery, which is charged by means of an alternator 40 of the vehicle. In the switching position "b", the capacitor 38 is connected to the on-board voltage source 32 via the switching element 30 (b) and a DC / DC converter 42, which converts the output voltage of the vehicle battery into a higher charging voltage of the capacitor 38. If, in an emergency braking operation, the switch 30 is switched to position "c", the capacitor 38 discharges, so that a higher operating voltage is available for the motor 24. The capacitance of the capacitor 38 should be so high that the voltage of this capacitor, while discharging via the motor 24, does not decrease too much over the duration of the emergency braking operation, or at any rate decreases more significantly only when the full brake pressure is built up.
Fig. 5 und 6 zeigen eine Ausführungsform, bei der der Kondensator 38 während des Notbremsvorgangs in Reihe mit der Bordspannungsquelle 32 geschaltet ist und bei der kein DC/DC- Wandler benötigt wird. Der Schalter 30 hat in diesem Fall drei miteinander gekoppelte Schaltglieder 30 (a) , 30 (b) und 30 (c) .5 and 6 show an embodiment in which the capacitor 38 is connected in series with the on-board voltage source 32 during the emergency braking operation and in which no DC / DC converter is required. The switch 30 in this case has three mutually coupled switching elements 30 (a), 30 (b) and 30 (c).
In Fig. 5 befindet sich der Schalter in der Schaltstellung "b", in der der Motor 24 über das Schaltglied 30 (a) nur mit der Bordspannungsquelle 32 verbunden ist. Der Kondensator 38 ist in dieser Schaltstellung über das Schaltglied 30b parallel zum Motor 24 mit der Bordspannungsquelle 32 verbunden, und seine andere Elektrode ist über das Schaltglied 30 (c) geerdet, so daß der Kondensator auf die Spannung der Bordspannungsquelle 32 aufgeladen und dann auf dieser Spannung gehalten wird.In Fig. 5, the switch is in the switching position "b", in which the motor 24 via the switching member 30 (a) is connected only to the on-board voltage source 32. The capacitor 38 is connected in this switching position via the switching element 30b parallel to the motor 24 to the on-board voltage source 32, and its other electrode is grounded via the switching member 30 (c), so that the capacitor is charged to the voltage of the on-board voltage source 32 and then held at this voltage.
Wenn in die in Fig. 6 gezeigte Schaltstellung "c" umgeschaltet wird, so ist das Schaltglied 30 (b) geöffnet, und das Schaltglied 30 (c) verbindet den Kondensator 38 nicht mehr mit Masse, sondern mit der Bordspannungsquelle 32, so daß das Potential des Kondensators 38 insgesamt um die Spannung der Bordspannungsquelle 32 angehoben wird. Über das Schaltglied 30 (a) liegt deshalb am Motor 24 nun das Zweifache der Ausgangsspannung der Bordspannungsquelle 32 an. Der durch den Motor 24 fließende Strom ist der Entladestrom des Kondensators 38. Deshalb sollte auch hier der Kondensator eine relativ hohe Kapazität haben.When switching to the switching position "c" shown in FIG. 6, the switching member 30 (b) is opened, and the switching member 30 (c) no longer connects the capacitor 38 to ground, but to the on-board voltage source 32, so that the Potential of the capacitor 38 is raised in total by the voltage of the on-board voltage source 32. By way of the switching element 30 (a), therefore, the motor 24 now has twice the output voltage of the on-board voltage source 32. The current flowing through the motor 24 is the discharge current of the capacitor 38. Therefore, also here, the capacitor should have a relatively high capacity.
Fig. 7 und 8 zeigen ein Beispiel, bei dem die Bordspannungsquelle 32 und der Kondensator 38 während des Notbremsvorgangs ebenfalls in Reihe geschaltet sind, bei dem jedoch die Ladespannung des Kondensators 38 mit Hilfe des DC/DC- Wandlers 42 zusätzlich erhöht werden kann. In der in Fig. 7 gezeigten Schaltstellung "b" ist der Motor 24 über das Schaltglied 30 (a) nur mit der Bordspannungsquelle 32 verbunden, während der Kondensator 38 über das Schaltglied 30 (c) geerdet ist und über den DC/DC-Wandler 42 und das das Schaltglied 30 (b) aufgeladen wird.7 and 8 show an example in which the on-board voltage source 32 and the capacitor 38 are also connected in series during the emergency braking operation, but in which the charging voltage of the capacitor 38 can be additionally increased by means of the DC / DC converter 42. In the switching position "b" shown in FIG. 7, the motor 24 is connected via the switching element 30 (a) only to the on-board voltage source 32, while the capacitor 38 is earthed via the switching element 30 (c) and via the DC / DC converter 42 and that the switching element 30 (b) is charged.
In der Schaltstellung "c" gemäß Fig. 8 entlädt sich der Kondensator 38 über das Schaltglied 30 (a) , während sein Potential durch das Schaltglied 30 (c) auf die Ausgangsspannung der Bordspannungsquelle 32 angehoben wird. In the switching position "c" shown in FIG. 8, the capacitor 38 discharges via the switching element 30 (a), while its potential is raised by the switching element 30 (c) to the output voltage of the on-board voltage source 32.

Claims

Ansprüche claims
1. Bremsanlage für Kraftfahrzeuge, mit einer Pumpe (22) zum Fördern von Bremsflüssigkeit in eine Bremsdruckleitung (10), einem an eine Bordspannungsquelle (32) anschließbaren Motor (24) zum Antrieb der Pumpe (22), und einer Steuereinrichtung (26) für den Motor, dadurch gekennzeichnet, daß zusätzlich zu der Bordspannungsquelle (32) ein elektrischer Energiespeicher (36; 38) vorgesehen ist und daß die Steuereinrichtung (26) dazu ausgebildet ist, den Motor (24) zeitweise an den Energiespeicher (36; 38) anzuschließen.A brake system for motor vehicles, comprising a pump (22) for delivering brake fluid into a brake pressure line (10), a motor (24) connectable to an on-board voltage source (32) for driving the pump (22), and a control device (26) the motor, characterized in that in addition to the on-board voltage source (32) an electrical energy store (36; 38) is provided and that the control device (26) is adapted to temporarily connect the motor (24) to the energy store (36; 38) ,
2. Bremsanlage nach Anspruch 1, dadurch gekennzeichnet, daß der Energiespeicher eine Zusatzbatterie (36) aufweist.2. Brake system according to claim 1, characterized in that the energy store has an additional battery (36).
3. Bremsanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Energiespeicher mindestens einen energiespeichernden Kondensator (38) aufweist.3. Brake system according to claim 1 or 2, characterized in that the energy store has at least one energy-storing capacitor (38).
4. Bremsanlage nach Anspruch 3, dadurch gekennzeichnet, daß der Kondensator (38) über einen Wandler (42) mit der Bordspannungsquelle (32) verbunden und durch den Wandler auf eine Spannung aufladbar ist, die höher ist als die der Bordspannungsquelle (32) . 4. Brake system according to claim 3, characterized in that the capacitor (38) via a converter (42) to the on-board voltage source (32) and can be charged by the converter to a voltage which is higher than that of the on-board voltage source (32).
5. Bremsanlage nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Steuereinrichtung (26) dazu ausgebildet ist, den Motor (24) wechselweise an die Bordspannungsquelle (32) und den Energiespeicher (36; 38) anzuschließen .5. Brake system according to one of the preceding claims, characterized in that the control device (26) is adapted to connect the motor (24) alternately to the on-board voltage source (32) and the energy store (36, 38).
6. Bremsanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Steuereinrichtung (26) dazu ausgebildet ist, die Bordspannungsquelle (32) und den Energiespeicher (36) parallel mit dem Motor (24) zu verbinden .6. Brake system according to one of claims 1 to 4, characterized in that the control device (26) is adapted to connect the on-board voltage source (32) and the energy store (36) in parallel with the motor (24).
7. Bremsanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Steuereinrichtung (26) dazu ausgebildet ist, die Bordspannungsquelle (32) und den Energiespeicher (36; 38) in Reihe mit dem Motor (24) zu verbinden .7. Brake system according to one of claims 1 to 4, characterized in that the control device (26) is adapted to connect the on-board voltage source (32) and the energy store (36, 38) in series with the motor (24).
8. Bremsanlage nach einem der vorstehenden Ansprüche, gekennzeichnet durch ein aktives Sicherheitssystem (34), das dazu ausgebildet ist, abhängig von der Verkehrssituation einen Befehl zur automatischen Auslösung einer Notbremsung zu geben, und daß die Steuereinrichtung8. Brake system according to one of the preceding claims, characterized by an active safety system (34) which is adapted to give, depending on the traffic situation, a command for the automatic release of emergency braking, and in that the control device
(26) dazu ausgebildet ist, den Motor (24) während der Notbremsung mit dem Energiespeicher (36; 38) zu verbinden. (26) is adapted to connect the motor (24) during the emergency braking with the energy storage device (36, 38).
EP09780179A 2008-08-25 2009-07-06 Brake system for motor vehicles Withdrawn EP2321162A1 (en)

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009046339A1 (en) * 2009-11-03 2011-05-05 Robert Bosch Gmbh Method for carrying out an emergency braking operation in a vehicle
DE102011015692A1 (en) * 2011-03-31 2012-10-04 Volkswagen Aktiengesellschaft Device and method for generating a brake pressure in a motor vehicle
DE102011075345A1 (en) * 2011-05-05 2012-11-08 Robert Bosch Gmbh Method for carrying out an emergency braking operation in a vehicle
DE102012202467A1 (en) * 2012-02-17 2013-08-22 Continental Teves Ag & Co. Ohg Method for controlling a brake system, brake system and use
CN108708636B (en) * 2012-12-24 2021-05-14 麦格纳覆盖件有限公司 Collision management system and method in an electronic latch of a motor vehicle closing device
DE102014206136A1 (en) 2014-04-01 2015-11-12 Continental Teves Ag & Co. Ohg Method and electrical system for increasing a pressure build-up dynamics of a motor vehicle brake system
JP6413756B2 (en) * 2014-12-24 2018-10-31 株式会社アドヴィックス Motor drive control device
JP6468007B2 (en) * 2015-03-13 2019-02-13 株式会社アドヴィックス Vehicle occupant protection device
FR3050416B1 (en) * 2016-04-21 2018-05-11 Peugeot Citroen Automobiles Sa VEHICLE CONTROL ASSIST FUNCTION COMPRISING PUMP ENGINE POWER SUPPLY WITH INDUCTANCE
US10343660B2 (en) * 2016-06-16 2019-07-09 GM Global Technology Operations LLC Vehicle brake control system including eBoost regulated voltage control
IT202000026864A1 (en) * 2020-11-10 2022-05-10 Mecc 42 S R L BRAKE-BY-WIRE TYPE BRAKING SYSTEM FOR VEHICLES

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1518774A1 (en) * 2003-06-26 2005-03-30 Matsushita Electric Industrial Co., Ltd. Vehicle power source device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975578U (en) * 1982-11-12 1984-05-22 三菱電機株式会社 Control device for vehicle pump equipment
JPS61150858A (en) * 1984-12-25 1986-07-09 Nippon Denso Co Ltd Motor drive device for driving antiskid actuator
DE3502100C2 (en) * 1985-01-23 1996-04-11 Wabco Gmbh Pressure brake system for motor vehicles
DE3813174A1 (en) * 1988-04-20 1989-11-02 Teves Gmbh Alfred Brake pressure control device
DE4037142A1 (en) * 1990-11-22 1992-05-27 Bosch Gmbh Robert ELECTRICALLY OPERATED HYDROPUMP
JP3249564B2 (en) * 1992-01-13 2002-01-21 ボッシュ ブレーキ システム株式会社 Pump motor supply voltage control device and pump motor supply voltage control method in anti-skid brake control device
DE19622754A1 (en) * 1996-06-07 1997-12-11 Bosch Gmbh Robert Method and circuit for controlling a pump motor of a vehicle control system
DE19914404C2 (en) * 1999-03-30 2001-05-17 Bosch Gmbh Robert Method and device for controlling a pump of a brake system
JP3478193B2 (en) * 1999-05-24 2003-12-15 トヨタ自動車株式会社 Power monitoring device
JP3391324B2 (en) * 1999-12-27 2003-03-31 トヨタ自動車株式会社 Brake fluid pressure control device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1518774A1 (en) * 2003-06-26 2005-03-30 Matsushita Electric Industrial Co., Ltd. Vehicle power source device

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