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WO1997035753A1 - Pumpless braking pressure regulating system for motor vehicles - Google Patents

Pumpless braking pressure regulating system for motor vehicles Download PDF

Info

Publication number
WO1997035753A1
WO1997035753A1 PCT/EP1997/001455 EP9701455W WO9735753A1 WO 1997035753 A1 WO1997035753 A1 WO 1997035753A1 EP 9701455 W EP9701455 W EP 9701455W WO 9735753 A1 WO9735753 A1 WO 9735753A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure medium
pressure
brake
wheel brakes
control system
Prior art date
Application number
PCT/EP1997/001455
Other languages
German (de)
French (fr)
Inventor
Uwe Greiff
Hans-Dieter Reinartz
Helmut Steffes
Original Assignee
Itt Manufacturing Enterprises, Inc.
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 Itt Manufacturing Enterprises, Inc. filed Critical Itt Manufacturing Enterprises, Inc.
Publication of WO1997035753A1 publication Critical patent/WO1997035753A1/en

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
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means
    • B60T8/268—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means using the valves of an ABS, ASR or ESP system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/343—Systems characterised by their lay-out
    • B60T8/344—Hydraulic systems
    • B60T8/348—4 Channel systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—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
    • B60T8/42—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 having expanding chambers for controlling pressure, i.e. closed systems

Definitions

  • the invention relates to a pumpless brake pressure control system for motor vehicles according to the preamble of claim 1.
  • Such a system is already known from DE 43 34 838 AI.
  • This brake system has front and rear wheel brakes which are connected to a master cylinder in diagonal brake circuit division via corresponding pressure medium connections.
  • Pressure modulation valves are assigned to the wheel brakes, which control the pressure medium connection between the master cylinder and the wheel brakes and between the wheel brakes and a pressure medium accumulator assigned to each brake circuit.
  • the pressure medium reservoir is connected between the pressure modulation valves and the master cylinder to the pressure medium connection of each brake circuit.
  • control and regulating electronics are also provided which, if required, establish or separate the pressure medium connection between the master cylinder and the wheel brakes or directly introduce the pressure medium volume in the wheel brakes into a pressure medium storage device.
  • the pressure medium reservoir thus connected to the outlet side of the pressure modulation valves is thus connected in series between the pressure medium connection leading to the master cylinder.
  • Fig. 1 shows the hydraulic circuit diagram of the brake pressure control system according to the invention
  • FIG. 2 the construction of the pressure medium accumulator according to FIG.
  • FIG. 1 shows the hydraulic circuit diagram for a pumpless brake pressure control system for motor vehicles, the wheel brakes VL, VR, HL, HR of which are connected to a master cylinder 10 in a diagonal brake circuit division. Consequently, one of the two pressure elements leading to the wheel brakes branches in each case. Tel connection to a front wheel and diagonally arranged rear brake. Upstream of each wheel brake VL, HR, HL, VR there is a pressure modulation valve 9 'designed as a 2/2-way valve, which in its electromagnetically non-energized basic position has an unimpeded pressure medium connection between the master cylinder 10 and the wheel brake VL, HR assigned to it , HL, VR manufactures.
  • each wheel brake VL, HR, HL, VR Downstream of each wheel brake VL, HR, HL, VR there is also a pressure modulation valve 9 designed as a 2/2-way valve, which, in its electromagnetically non-energized basic position, connects the pressure medium between each wheel brake VL, HR, HL, VR separates.
  • the pressure medium connection of each brake circuit connected to these pressure modulation valves 9 leads back to the master cylinder 10, with a pressure medium reservoir 7 in a pressure medium branch between a check valve 11 opening in the direction of the master cylinder 10 and the pressure modulation valve 9 on the outlet side associated with the wheel brakes pressure medium connection located downstream of the wheel brakes is connected.
  • the pressure medium accumulator 7 has a sensor 4, the function and construction of which can be seen in the following from FIG. 2.
  • the aforementioned check valve 11 is located downstream of the respective brake circuit diagonal connected to the wheel brakes on the input side, so that there is an unobstructed pressure medium path from the master cylinder 10 for pressurizing the wheel brakes and at the same time an overflow of the pressure medium fluid coming from the master cylinder 10 into the pressure medium reservoir 7 of each Brake circuit diagonal is prevented.
  • FIG. 1 corresponds to the normal brake position in which all wheel brakes are hydraulic and free of wheel slippage. are connected to the master cylinder 10.
  • a pressure build-up in the wheel brakes which is unhindered by the pressure modulation valves 9, 9 'is ensured until the pressure modulation valves 9' acting as inlet valves separate the pressure medium connection to the master cylinder 10 by means of the wheel slip values determined from the wheel speeds using control and regulating electronics 12.
  • a constant pre-stressed pressure medium volume thus remains in the wheel brakes, which volume can only relax in the direction of the pressure medium accumulator 7 with the electromagnetically actuated opening of the pressure modulation valve 9, which acts as an outlet valve.
  • the pressure modulation valve 9 assigned to the rear wheel brake is switched to the open position in dependence on a signal from the sensor 4 attached to the pressure medium reservoir 7 by the control and regulating electronics 11, in which a pressure medium connection between the respective rear wheel brake is switched and the pressure medium accumulator 7, while with the help of the control and regulating electronics 11 the pressure modulation valve 9 assigned to the corresponding brake circuit diagonal of the respective front wheel brake remains in the blocking position. From this point in time, only the excess pressure medium volume of the rear wheel brakes is inevitably discharged into the respectively connected pressure medium accumulator 7, which ensures that the rear wheel brakes do not lock and the vehicle thus remains stable. With the help of the control and regulating electronics 11, the degree of filling of the pressure medium store 7 is consequently monitored, evaluated with the aid of the sensor 4 and converted into corresponding control signals for the pressure modulation valves 9, 9 '.
  • the sensor 4 is designed as a position transmitter, for which purpose a reed contact is accommodated in the sensor 4.
  • the sensor 4 is part of a closure body 1, which is inserted into the bore of the pressure medium accumulator 7.
  • the pressure medium store 7 has a piston 6 provided with a magnet 5, which can be displaced along the sensor 4 depending on the degree of filling in the pressure medium store 7.
  • the position of the displacement sensor can be adjusted continuously relative to the piston 6 by means of a threaded piece 3 inserted in the closure body 1.
  • the sensor 4 has a sleeve-shaped housing in which at least one reed contact is accommodated.
  • the sleeve-shaped housing is held at one end in the threaded piece 3, while the opposite end extends into the magnet 5 designed as a ring magnet.
  • the magnet 5 is fastened in a sleeve 2 which is held on the piston 6 under the action of a compression spring 16.
  • the piston 6 In the basic position shown in the illustration, the piston 6 is in abutment against a housing end wall.
  • the housing 13 shown here only in sections preferably accommodates all the other pressure modulation valves 9, 9 'shown in FIG. 1 as well as the check valves 11 with the corresponding associated pressure medium connection channels.
  • the housing bore provided for the pressure medium reservoir 7 receives the essentially sleeve-shaped closure body 1, which is fastened in the housing bore by means of a retaining ring 14.
  • the end of the turn of the compression spring 12 facing away from the piston 6 is supported on an intermediate wall of the sleeve-shaped closure body 1, which is likewise in a coaxial bore. tion receives the threaded piece 3.
  • the reed contact arranged within the sensor 4 is connected to the control and regulating electronics 12 via an electrical connection 15.
  • the outer end section of the closure body 1 is preferably filled with a potting compound 8.
  • a sealing plug or the like can also be used.
  • the construction described has the advantage that the sensor 4 can be precisely adjusted by means of the threaded piece 3. Furthermore, the electrical connection 15 can be passed through the cylindrical threaded piece 3.
  • the sensor 4 is preferably attached to the threaded piece 3 by means of an adhesive connection.
  • the magnet 5 can be held on the sleeve 2 in a relatively simple manner in a positive and / or non-positive manner.
  • a non-contact sensor 4 which in the present example is particularly inexpensively equipped with a reed contact, no forces beyond the action of the compression spring 12 are effective on the piston 6 and the sensor 4 can be wear-free with the magnet 5 work together.
  • the sensor 4 expediently forms a preassembled unit with the closure body 1, which can be fastened in the housing 13 by means of the retaining ring 14.

Landscapes

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

Abstract

A pumpless braking pressure regulating system for motor vehicles with rear and front-wheel brakes (HR, HL, VR, VL) connected to a master cylinder (10) via at least one pressure line, with pressure regulating valves (9, 9') associated with the wheel brakes which control the pressure medium link between the master cylinder (10) and the wheel brakes and between the wheel brakes and at least one pressure medium store (7) which accepts the pressure medium coming from the wheel brakes when the pressure regulating valves (9) are open, control and regulating electronics (12) monitoring actuating the pressure regulating valves (9, 9'). If the pressure medium store (7) is partly filled, the control and regulating electronics (12), depending on a signal from a sensor (4) fitted to the pressure medium store (7), set at least a pressure regulating valve (9) associated with the rear-wheel brakes (HL; HR) to a position in which there is a pressure medium link only between a rear-wheel brake (HR; HL) and the pressure medium store (7).

Description

Pumpenloses Bremsdruckregelsystem für KraftfahrzeugePumpless brake pressure control system for motor vehicles
Die Erfindung betrifft ein pumpenloses Bremsdruckregelsystem für Kraftfahrzeuge nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a pumpless brake pressure control system for motor vehicles according to the preamble of claim 1.
Ein derartiges System ist bereits aus der DE 43 34 838 AI bekannt geworden. Diese Bremsanlage weist Vorderrad- als auch Hinterradbremsen auf, die in Diagonalbremskreisauftei¬ lung über entsprechende Druckmittelverbindungen an einen Hauptzylinder angeschlossen sind. Den Radbremsen sind Druck¬ modulationsventile zugeordnet, welche die Druckmittelverbin¬ dung zwischen dem Hauptzylinder und den Radbremsen sowie zwischen den Radbremsen und einem je Bremskreis zugeordneten Druckmittelspeicher steuern. Der Druckmittelspeicher ist zwischen den Druckmodulationsventilen und dem Hauptzylinder an die Druckmittelverbindung eines jeden Bremskreises an¬ geschlossen. Zur Betätigung der Druckmodulationsventile ist ferner eine Steuer- und Regelelektronik vorgesehen, die bei Bedarf die Druckmittelverbindung zwischen dem Hauptzylinder und den Radbremsen herstellt, trennt oder das in den Rad¬ bremsen befindliche Druckmittelvolumen unmittelbar in einen Druckmittelspeicher einleitet. Der damit an der Auslaßseite der Druckmodulationsventile angeschlossene Druckmittelspei¬ cher befindet sich somit zwischen der zum Hauptzylinder füh¬ renden Druckmittelverbindung in Reiheschaltung. Daraus er¬ gibt sich eine spezielle Konstruktion des Druckmittelspei¬ chers in Form eines Zweikammer-Kolbenspeichers, um in der ersten, kleineren Kammer ausschließlich das von der jeweili- gen Vorderradbremse abgelassene Druckmittelvolumen zwischen- zuspeichern, wobei das jeweils von der Hinterradbremse in die zweite Kammer des Druckmittelspeichers abgelassene Druckmittelvolumen einen Kolben zurückstellt, der in seiner Endstellung beide Kammern voneinander trennt.Such a system is already known from DE 43 34 838 AI. This brake system has front and rear wheel brakes which are connected to a master cylinder in diagonal brake circuit division via corresponding pressure medium connections. Pressure modulation valves are assigned to the wheel brakes, which control the pressure medium connection between the master cylinder and the wheel brakes and between the wheel brakes and a pressure medium accumulator assigned to each brake circuit. The pressure medium reservoir is connected between the pressure modulation valves and the master cylinder to the pressure medium connection of each brake circuit. To actuate the pressure modulation valves, control and regulating electronics are also provided which, if required, establish or separate the pressure medium connection between the master cylinder and the wheel brakes or directly introduce the pressure medium volume in the wheel brakes into a pressure medium storage device. The pressure medium reservoir thus connected to the outlet side of the pressure modulation valves is thus connected in series between the pressure medium connection leading to the master cylinder. This results in a special construction of the pressure medium accumulator in the form of a two-chamber piston accumulator, in order to ensure that only that of the respective store the pressure medium volume drained against the front wheel brake, the pressure medium volume discharged from the rear wheel brake into the second chamber of the pressure medium reservoir resets a piston which, in its end position, separates the two chambers from each other.
Daher ist es die Aufgabe der Erfindung, ein pumpenloses Bremsdruckregelsystem der eingangs genannten Art dahingehend zu verbessern, daß mit relativ kleinem Mitteleinsatz eine schaltungstechnisch und damit baulich vereinfachte Brems¬ anlage geschaffen wird, die sich auch in Hinblick auf den Druckmittelspeicher günstig herstellen läßt.It is therefore the object of the invention to improve a pumpless brake pressure control system of the type mentioned at the outset in such a way that, with a relatively small amount of resources, a brake system which is simplified in terms of circuitry and construction is created, which can also be produced inexpensively with regard to the pressure medium reservoir.
Diese Aufgabe wird erfindungsgemäß für das pumpenlose Brems¬ druckregelsystem der gattungsbildenden Art mit den kenn¬ zeichnenden Merkmalen des Patentanspruchs 1 gelöst.This object is achieved according to the invention for the pumpless brake pressure control system of the generic type with the characterizing features of patent claim 1.
Weitere Merkmale, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich nachfolgend aus der Beschreibung ei¬ nes Ausführungsbeispiels anhand zweier Zeichnungen.Further features, advantages and possible uses of the invention result from the description of an exemplary embodiment with reference to two drawings.
Es zeigen:Show it:
Fig . 1 den Hydraulikschaltplan des erfindungsgemäßen Brems¬ druckregelsystems ,Fig. 1 shows the hydraulic circuit diagram of the brake pressure control system according to the invention,
Fig . 2 die Konstruktion des Druckmittelspeichers nach Fig .Fig. 2 the construction of the pressure medium accumulator according to FIG.
1 .1 .
Die Fig. 1 zeigt den Hydraulikschaltplan für ein pumpenloses Bremsdruckregelsystem für Kraftfahrzeuge, dessen Radbremsen VL, VR, HL, HR in Diagonalbremskreisaufteilung an einem Hauptzylinder 10 angeschlossen sind. Folglich verzweigt je¬ weils eine der beiden zu den Radbremsen führende Druckmit- telverbindung auf eine Vorderrad- und diagonal dazu angeord¬ nete Hinterradbremse. Stromaufwärts zu jeder Radbremse VL, HR, HL, VR befindet sich ein als 2/2-Wegeventil ausgeführtes Druckmodulationsventil 9', das in seiner elektromagnetisch nicht erregten Grundstellung eine ungehinderte Druckmittel¬ verbindung zwischen dem Hauptzylinder 10 und der ihr jeweils zugeordneten Radbremse VL, HR, HL, VR herstellt. Stromab¬ wärts zu jeder Radbremse VL, HR, HL, VR befindet sich gleichfalls ein als 2/2-Wegeventil ausgeführtes Druckmodula¬ tionsventil 9, das in seiner elektromagnetisch nicht erreg¬ ten Grundstellung die Druckmittelverbindung zwischen einer jeden Radbremse VL, HR, HL, VR trennt. Die an diesen Druck¬ modulationsventilen 9 angeschlossene Druckmittelverbindung eines jeden Bremskreises führt zurück zum Hauptzylinder 10, wobei zwischen einem in Richtung des Hauptzylinders 10 öff¬ nenden Rückschlagventils 11 und dem auslaßseitig den Rad¬ bremsen zugeordneten Druckmodulationsventil 9 ein Druckmit¬ telspeicher 7 in einem Druckmittelabzweig der stromabwärts der Radbremsen gelegenen Druckmittelverbindung angeschlossen ist. Der Druckmittelspeicher 7 weist einen Sensor 4 auf, dessen Funktion und Konstruktion im nachfolgenden aus Fig. 2 ersichtlich ist. Das voran erwähnte Rückschlagventil 11 be¬ findet sich stromabwärts zur jeweiligen an den Radbremsen eingangsseitig angeschlossenen Bremskreisdiagonale, so daß einer ungehinderter Druckmittelpfad vom Hauptzylinder 10 zur Druckbeaufschlagung der Radbremsen besteht und gleichzeitig ein Überströmen des vom Hauptzylinder 10 kommenden Druck- mittelfluids in den Druckmittelspeicher 7 einer jeden Brems¬ kreisdiagonale verhindert ist.1 shows the hydraulic circuit diagram for a pumpless brake pressure control system for motor vehicles, the wheel brakes VL, VR, HL, HR of which are connected to a master cylinder 10 in a diagonal brake circuit division. Consequently, one of the two pressure elements leading to the wheel brakes branches in each case. Tel connection to a front wheel and diagonally arranged rear brake. Upstream of each wheel brake VL, HR, HL, VR there is a pressure modulation valve 9 'designed as a 2/2-way valve, which in its electromagnetically non-energized basic position has an unimpeded pressure medium connection between the master cylinder 10 and the wheel brake VL, HR assigned to it , HL, VR manufactures. Downstream of each wheel brake VL, HR, HL, VR there is also a pressure modulation valve 9 designed as a 2/2-way valve, which, in its electromagnetically non-energized basic position, connects the pressure medium between each wheel brake VL, HR, HL, VR separates. The pressure medium connection of each brake circuit connected to these pressure modulation valves 9 leads back to the master cylinder 10, with a pressure medium reservoir 7 in a pressure medium branch between a check valve 11 opening in the direction of the master cylinder 10 and the pressure modulation valve 9 on the outlet side associated with the wheel brakes pressure medium connection located downstream of the wheel brakes is connected. The pressure medium accumulator 7 has a sensor 4, the function and construction of which can be seen in the following from FIG. 2. The aforementioned check valve 11 is located downstream of the respective brake circuit diagonal connected to the wheel brakes on the input side, so that there is an unobstructed pressure medium path from the master cylinder 10 for pressurizing the wheel brakes and at the same time an overflow of the pressure medium fluid coming from the master cylinder 10 into the pressure medium reservoir 7 of each Brake circuit diagonal is prevented.
Nachfolgend soll kurz die Funktionsweise der Bremsanlage beschrieben werden. Die abbildungsgemäße Darstellung nach Fig. 1 entspricht sowohl der bremslöse- als auch radschlupf- freien Normalbremsstellung, in der alle Radbremsen hydrau- lisch mit dem Hauptzylinder 10 verbunden sind. Ein durch die Druckmodulationsventile 9, 9' ungehinderter Druckaufbau in den Radbremsen ist so lange gewährleistet, bis mittels den aus den Raddrehzahlen ermittelten Radschlupfwerten anhand einer Steuer- und Regelelektronik 12 die als Einlaßventile wirksamen Druckmodulationsventile 9' die Druckmittelverbin¬ dung zum Hauptzylinder 10 trennen. Damit verharrt in den Radbremsen ein konstant vorgespanntes Druckmittelvolumen, das sich erst mit dem elektromagnetisch betätigten Öffnen des jeweils als Auslaßventil wirksamen Druckmodulationsven¬ til 9 in Richtung des Druckmittelspeichers 7 entspannen kann. Bei einer Teilbefüllung des Druckmittelspeichers 7 wird in Abhängigkeit eines Signals des am Druckmittelspei¬ cher 7 angebrachten Sensors 4 durch die Steuer- und Regel¬ elektronik 11 jeweils das der Hinterradbremse zugeordnete Druckmodulationsventil 9 in Offenposition geschaltet, in der eine Druckmittelverbindung zwischen der jeweiligen Hinter¬ radbremse und dem Druckmittelspeicher 7 besteht, während mit Hilfe der Steuer- und Regelelektronik 11 gleichzeitig das der entsprechenden Bremskreisdiagonale der jeweiligen Vor¬ derradbremse auslaßseitig zugeordnete Druckmodulationsventil 9 in Sperrstellung verharrt. Ab diesem Zeitpunkt wird zwangsläufig nur noch das überschüssige Druckmittelvolumen der Hinterradbremsen in den jeweils angeschlossenen Druck¬ mittelspeicher 7 abgelassen, womit gewährleistet ist, daß die Hinterradbremsen nicht blockieren und somit das Fahrzeug spurstabil bleibt. Mit Hilfe der Steuer- und Regelelektronik 11 wird folglich der Füllungsgrad des Druckmittelspeichers 7 anhand des Sensors 4 überwacht, ausgewertet und in entspre¬ chende Steuersignale für die Druckmodulationsventile 9,9' umgesetzt.The operation of the brake system is briefly described below. The illustration shown in FIG. 1 corresponds to the normal brake position in which all wheel brakes are hydraulic and free of wheel slippage. are connected to the master cylinder 10. A pressure build-up in the wheel brakes which is unhindered by the pressure modulation valves 9, 9 'is ensured until the pressure modulation valves 9' acting as inlet valves separate the pressure medium connection to the master cylinder 10 by means of the wheel slip values determined from the wheel speeds using control and regulating electronics 12. A constant pre-stressed pressure medium volume thus remains in the wheel brakes, which volume can only relax in the direction of the pressure medium accumulator 7 with the electromagnetically actuated opening of the pressure modulation valve 9, which acts as an outlet valve. When the pressure medium reservoir 7 is partially filled, the pressure modulation valve 9 assigned to the rear wheel brake is switched to the open position in dependence on a signal from the sensor 4 attached to the pressure medium reservoir 7 by the control and regulating electronics 11, in which a pressure medium connection between the respective rear wheel brake is switched and the pressure medium accumulator 7, while with the help of the control and regulating electronics 11 the pressure modulation valve 9 assigned to the corresponding brake circuit diagonal of the respective front wheel brake remains in the blocking position. From this point in time, only the excess pressure medium volume of the rear wheel brakes is inevitably discharged into the respectively connected pressure medium accumulator 7, which ensures that the rear wheel brakes do not lock and the vehicle thus remains stable. With the help of the control and regulating electronics 11, the degree of filling of the pressure medium store 7 is consequently monitored, evaluated with the aid of the sensor 4 and converted into corresponding control signals for the pressure modulation valves 9, 9 '.
Bis zum Schaltpunkt des Reedkontaktes können in den Vorderrad- und Hinterradbremsen gleichermaßen Druck abgebaut werden. Nach erreichen des Schaltpunktes kann nur noch in den Hinterradbremsen weiter Druck abgebaut werden (Sicherheitskonzept).Up to the switching point of the reed contact, pressure can be reduced equally in the front and rear brakes become. After reaching the switching point, pressure can only be reduced in the rear wheel brakes (safety concept).
Die Fig. 2 zeigt den konstruktiven Aufbau des Sensors 4 in erheblich vergrößertem Maßstab. Der Sensor 4 ist als Weg¬ stellungsgeber ausgeführt, wozu im Sensor 4 ein Reed-Kontakt untergebracht ist. Der Sensor 4 ist Bestandteil eines Ver¬ schlußkörpers 1, der in die Bohrung des Druckmittelspeichers 7 eingesetzt ist. Der Druckmittelspeicher 7 weist einen mit einem Magneten 5 versehenen Kolben 6 auf, der in Abhängig¬ keit des Füllungsgrads im Druckmittelspeicher 7 am Sensor 4 entlang verschiebbar ist. Die Position des Wegstellungsge¬ bers ist gegenüber dem Kolben 6 mittels eines im Verschlu߬ körper 1 eingesetzten Gewindestücks 3 stufenlos einstellbar. Der Sensor 4 weist ein hülsenförmiges Gehäuse auf, in dem wenigstens ein Reed-Kontakt untergebracht ist. Das hülsen- förmige Gehäuse wird an seinem einen Ende im Gewindestück 3 gehalten, während das gegenüberliegende Ende sich bis in den als Ringmagneten ausgeführten Magneten 5 erstreckt. Der Ma¬ gnet 5 ist in einer Hülse 2 befestigt, die unter Wirkung einer Druckfeder 16 am Kolben 6 gehalten wird. In der ab¬ bildungsgemäßen Grundstellung befindet sich der Kolben 6 auf Anschlag an einer Gehäusestirnwand. Das hier ausschließlich abschnittsweise gezeigte Gehäuse 13 nimmt vorzugsweise alle übrigen, aus Fig. 1 ersichtlichen Druckmodulationsventile 9,9' als auch die Rückschlagventile 11 mit den entsprechend zugehörigen Druckmittelverbindungskanälen auf. Die für den Druckmittelspeicher 7 vorgesehene Gehäusebohrung nimmt den im wesentlichen hülsenförmigen Verschlußkörper 1 auf, der mittels eines Halterings 14 in der Gehäusebohrung befestigt ist. Das vom Kolben 6 abgewandte Windungsende der Druckfeder 12 stützt sich an einer Zwischenwand des hülsenförmigen Ver¬ schlußkörpers 1 ab, die gleichfalls in einer koaxialen Boh- rung das Gewindestück 3 aufnimmt. Der innerhalb des Sensors 4 angeordnete Reed-Kontakt steht über einen elektrischen Anschluß 15 mit der Steuer- und Regelelektronik 12 in Ver¬ bindung. Um den Sensor 4 vor äußeren Einflüssen, wie Schmutz und Feuchtigkeit zu schützen, ist der äußere Endabschnitt des Verschlußkörpers 1 vorzugsweise mit einer Vergußmasse 8 ausgefüllt. Anstelle der Vergußmasse 8 kann gleichfalls ein Dichtstopfen oder dergleichen verwendet werden. Die be¬ schriebene Konstruktion hat den Vorteil, daß der Sensor 4 mittels des Gewindestücks 3 präzise eingestellt werden kann. Ferner kann durch das zylinderförmige Gewindestück 3 der elektrische Anschluß 15 hindurchgeführt werden. Die Befesti¬ gung des Sensors 4 am Gewindestück 3 erfolgt vorzugsweise mittels einer Klebverbindung. Der Magnet 5 kann auf relativ einfache Weise form- und/oder kraftschlüssig an der Hülse 2 gehalten werden. Durch die Verwendung eines berührungslos arbeitenden Sensors 4, der im vorliegenden Beispiel beson¬ ders kostengünstig mit einem Reed-Kontakt ausgerüstet ist, sind auf den Kolben 6 keine über die Wirkung der Druckfeder 12 hinausgehenden Kräfte wirksam und der Sensor 4 kann mit dem Magneten 5 verschleißfrei zusammenarbeiten. Der Sensor 4 bildet zweckmäßigerweise eine vormontierte Einheit mit dem Verschlußkörper 1, die mittels des Halterings 14 montagegün¬ stig im Gehäuse 13 befestigt werden kann. 2 shows the structural design of the sensor 4 on a considerably enlarged scale. The sensor 4 is designed as a position transmitter, for which purpose a reed contact is accommodated in the sensor 4. The sensor 4 is part of a closure body 1, which is inserted into the bore of the pressure medium accumulator 7. The pressure medium store 7 has a piston 6 provided with a magnet 5, which can be displaced along the sensor 4 depending on the degree of filling in the pressure medium store 7. The position of the displacement sensor can be adjusted continuously relative to the piston 6 by means of a threaded piece 3 inserted in the closure body 1. The sensor 4 has a sleeve-shaped housing in which at least one reed contact is accommodated. The sleeve-shaped housing is held at one end in the threaded piece 3, while the opposite end extends into the magnet 5 designed as a ring magnet. The magnet 5 is fastened in a sleeve 2 which is held on the piston 6 under the action of a compression spring 16. In the basic position shown in the illustration, the piston 6 is in abutment against a housing end wall. The housing 13 shown here only in sections preferably accommodates all the other pressure modulation valves 9, 9 'shown in FIG. 1 as well as the check valves 11 with the corresponding associated pressure medium connection channels. The housing bore provided for the pressure medium reservoir 7 receives the essentially sleeve-shaped closure body 1, which is fastened in the housing bore by means of a retaining ring 14. The end of the turn of the compression spring 12 facing away from the piston 6 is supported on an intermediate wall of the sleeve-shaped closure body 1, which is likewise in a coaxial bore. tion receives the threaded piece 3. The reed contact arranged within the sensor 4 is connected to the control and regulating electronics 12 via an electrical connection 15. In order to protect the sensor 4 from external influences such as dirt and moisture, the outer end section of the closure body 1 is preferably filled with a potting compound 8. Instead of the potting compound 8, a sealing plug or the like can also be used. The construction described has the advantage that the sensor 4 can be precisely adjusted by means of the threaded piece 3. Furthermore, the electrical connection 15 can be passed through the cylindrical threaded piece 3. The sensor 4 is preferably attached to the threaded piece 3 by means of an adhesive connection. The magnet 5 can be held on the sleeve 2 in a relatively simple manner in a positive and / or non-positive manner. By using a non-contact sensor 4, which in the present example is particularly inexpensively equipped with a reed contact, no forces beyond the action of the compression spring 12 are effective on the piston 6 and the sensor 4 can be wear-free with the magnet 5 work together. The sensor 4 expediently forms a preassembled unit with the closure body 1, which can be fastened in the housing 13 by means of the retaining ring 14.
BezugszeichenlisteReference list
1 Verschlußkörper1 closure body
2 Hülse2 sleeve
3 Gewindestück3 threaded piece
4 Sensor4 sensor
5 Magnet5 magnet
6 Kolben6 pistons
7 Druckmittelspeicher7 pressure medium accumulator
8 Vergußmasse8 potting compound
9,9' Druckmodulationsventile9.9 'pressure modulation valves
10 Hauptzylinder10 master cylinders
11 Rückschlagventil11 check valve
12 Steuer- und Regelelektronik12 Control and regulating electronics
13 Gehäuse13 housing
14 Haltering14 retaining ring
15 Anschluß15 connection
16 Druckfeder 16 compression spring

Claims

Patentansprüche claims
1. Pumpenloses Bremsdruckregelsystera für Kraftfahrzeuge, mit über wenigstens eine Druckmittelverbindung an einem Hauptzylinder angeschlossene Hinterrad- und Vorderrad¬ bremsen, mit den Radbremsen zugeordnete Druckmodula¬ tionsventile, welche die Druckmittelverbindung zwischen dem Hauptzylinder und den Radbremsen sowie zwischen den Radbremsen und wenigstens einem Druckmittelspeicher steuern, der das von den Radbremsen kommende Druckmittel bei geöffneten Druckmodulationsventilen aufnimmt, mit einer Steuer- und Regelelektronik zur Überwachung und zur Betätigung der Druckmodulationsventile, dadurch ge¬ kennzeichnet, daß sich der Druckmittelspeicher (7) je¬ weils in einem Nebenanschluß zu einer an der Hinterrad- und Vorderradbremse (HR; HL) angeschlossenen Druckmit¬ telverbindung befindet, die stromabwärts des Druckmit¬ telspeichers (7) ausschließlich mit dem Hauptzylinder (10) verbunden ist, und daß bei einer Teilbefüllung des Druckmittelspeichers (7) in Abhängigkeit eines Signals eines am Druckmittelspeicher (7) angebrachten Sensors (4) die Steuer- und Regelelektronik (11) wenigstens ein den Hinterradbremsen (HL; HR) zugeordnetes Druckmodula¬ tionsventil (9) in eine Position schaltet, in der aus¬ schließlich eine Druckmittelverbindung zwischen einer Hinterradbremse (HR; HL) und dem Druckmittelspeicher (7) besteht.1. Pumpless brake pressure control system for motor vehicles, with rear wheel and front wheel brakes connected via at least one pressure medium connection to a master cylinder, pressure modulation valves associated with the wheel brakes, which control the pressure medium connection between the master cylinder and the wheel brakes and between the wheel brakes and at least one pressure medium accumulator. which receives the pressure medium coming from the wheel brakes when the pressure modulation valves are open, with control and regulating electronics for monitoring and actuating the pressure modulation valves, characterized in that the pressure medium accumulator (7) is in each case in a secondary connection to one on the rear wheel and front wheel brake (HR; HL) connected pressure medium connection, which is connected downstream of the pressure medium accumulator (7) exclusively to the master cylinder (10) and that depending on a partial filling of the pressure medium accumulator (7) it signals a sensor (4) attached to the pressure medium store (7), the control and regulating electronics (11) at least one of the rear wheel brakes (HL; HR) assigned pressure modulation valve (9) switches to a position in which there is exclusively a pressure medium connection between a rear wheel brake (HR; HL) and the pressure medium accumulator (7).
Bremsdruckregelsystem nach Anspruch 1, dadurch gekenn¬ zeichnet, daß der Sensor (4) als Stellungsgeber einer die Teilbefüllung des Druckmittelspeichers (7) sensie- renden Wand, vorzugsweise Membranwand oder Kolbenwand ausgeführt ist. Brake pressure control system according to claim 1, characterized gekenn¬ characterized in that the sensor (4) is designed as a position sensor of the partial filling of the pressure medium reservoir (7) sensing wall, preferably membrane wall or piston wall.
3. Bremsdruckregelsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Stellungsgeber als berührungs¬ loses Meßsystem ausgeführt ist, das vorzugsweise einen Reed-Kontakt aufweist.3. Brake pressure control system according to claim 1 or 2, characterized in that the position transmitter is designed as a contactless measuring system, which preferably has a reed contact.
4. Bremsdruckregelsystem nach Anspruch 3, dadurch gekenn¬ zeichnet, daß der Stellungsgeber Bestandteil eines Ver¬ schlußkörpers (1) ist, der in einem Druckmittelspeicher (7) gehalten ist.4. Brake pressure control system according to claim 3, characterized gekenn¬ characterized in that the position transmitter is part of a Ver¬ closure body (1) which is held in a pressure medium store (7).
5. Bremsdruckregelsystem nach Anspruch 4, dadurch gekenn¬ zeichnet, daß ein Kolben (6) des Druckmittelspeichers (7) einen Magneten (5) aufnimmt, der an einem Reed-Kon¬ takt des Stellungsgebers entlang verschiebbar ist.5. Brake pressure control system according to claim 4, characterized gekenn¬ characterized in that a piston (6) of the pressure medium accumulator (7) receives a magnet (5) which is displaceable along a reed contact of the position transmitter.
6. Bremsdruckregelsystem nach Anspruch 3, dadurch gekenn¬ zeichnet, daß die Position des Stellungsgebers gegenüber einem Kolben (6) des Druckmittelspeichers (7) stufenlos einstellbar ist.6. Brake pressure control system according to claim 3, characterized gekenn¬ characterized in that the position of the position transmitter relative to a piston (6) of the pressure medium accumulator (7) is infinitely adjustable.
7. Bremsdruckregelsystem nach Anspruch 6, dadurch gekenn¬ zeichnet, daß der Stellungsgeber an einem im Verschlu߬ körper (1) eingesetzten Gewindestück (3) angebracht ist. 7. Brake pressure control system according to claim 6, characterized gekenn¬ characterized in that the position transmitter on a body (1) used in the threaded piece (3) is attached.
PCT/EP1997/001455 1996-03-23 1997-03-21 Pumpless braking pressure regulating system for motor vehicles WO1997035753A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19611550.7 1996-03-23
DE1996111550 DE19611550A1 (en) 1996-03-23 1996-03-23 Pumpless brake pressure control system for motor vehicles

Publications (1)

Publication Number Publication Date
WO1997035753A1 true WO1997035753A1 (en) 1997-10-02

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WO (1) WO1997035753A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928117A1 (en) * 2008-03-03 2009-09-04 Peugeot Citroen Automobiles Sa BRAKING SYSTEM FOR IMPLEMENTING A STABILITY AND TRACK CONTROL METHOD
FR2928324A1 (en) * 2008-03-04 2009-09-11 Peugeot Citroen Automobiles Sa Braking system i.e. electronic stability program braking system, for motor vehicle, has braking managing circuit comprising accumulator permitting generation of brake pressure independent of actions of driver on control device
FR2928326A1 (en) * 2008-03-04 2009-09-11 Peugeot Citroen Automobiles Sa Braking system e.g. electronic stability control braking system, for motor vehicle, has traction system for transmitting hydraulic energy from pump to accumulator in order to store energy in accumulator
EP2103493A1 (en) * 2008-03-20 2009-09-23 Peugeot Citroën Automobiles S.A. System for controlling the stability and the trajectory of an automotive vehicle using an active brake booster

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10250552A (en) * 1997-03-13 1998-09-22 Sumitomo Electric Ind Ltd Anti-skid control device
US6341827B1 (en) * 1997-11-27 2002-01-29 Continental Teves Ag & Co., Ohg Brake system with a rear axle anti-locking arrangement
DE102004046940A1 (en) * 2004-02-06 2005-08-25 Continental Teves Ag & Co. Ohg motorcycle brake system
DE102005052167A1 (en) * 2004-11-30 2006-06-01 Continental Teves Ag & Co. Ohg Anti-blocking control method for brake system of especially motorcycle entails building up wheel brake pressure in dependence upon still available brake fluid residual volume and assessment of brake fluid volume still required

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1780654A1 (en) * 1965-05-14 1973-02-08 Graubremse Gmbh CONTROL ARRANGEMENT FOR PRESSURE IN WHEEL BRAKE CYLINDERS
JPH02169359A (en) * 1988-09-15 1990-06-29 Nippondenso Co Ltd Braking pressure controller
DE4334838A1 (en) * 1993-10-13 1995-04-20 Teves Gmbh Alfred Brake system with electronic anti-lock control

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933085A1 (en) * 1979-08-16 1981-02-26 Bosch Gmbh Robert ANTI-BLOCKING CONTROL SYSTEM
DE3109372A1 (en) * 1981-03-12 1982-09-30 Volkswagenwerk Ag, 3180 Wolfsburg "PUMPLESS HYDRAULIC BRAKE SYSTEM FOR MOTOR VEHICLES"
DE3322786A1 (en) * 1983-06-24 1985-01-10 Volkswagenwerk Ag, 3180 Wolfsburg Hydraulic and/or pneumatic braking system for vehicle
US4976501A (en) * 1985-02-19 1990-12-11 Kelsey-Hayes Company Fluid accumulator for use in a vehicle anti-lock brake system
DE3735366A1 (en) * 1987-10-19 1989-05-03 Teves Gmbh Alfred SLIP-CONTROLLED MOTOR VEHICLE BRAKE SYSTEM
DE4232614A1 (en) * 1992-09-29 1994-03-31 Teves Gmbh Alfred Anti-lock hydraulic brake system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1780654A1 (en) * 1965-05-14 1973-02-08 Graubremse Gmbh CONTROL ARRANGEMENT FOR PRESSURE IN WHEEL BRAKE CYLINDERS
JPH02169359A (en) * 1988-09-15 1990-06-29 Nippondenso Co Ltd Braking pressure controller
DE4334838A1 (en) * 1993-10-13 1995-04-20 Teves Gmbh Alfred Brake system with electronic anti-lock control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 428 (M - 1025) 14 September 1990 (1990-09-14) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928117A1 (en) * 2008-03-03 2009-09-04 Peugeot Citroen Automobiles Sa BRAKING SYSTEM FOR IMPLEMENTING A STABILITY AND TRACK CONTROL METHOD
EP2098425A1 (en) * 2008-03-03 2009-09-09 Peugeot Citroën Automobiles S.A. Braking systems allowing the execution of a method for controlling the stability and trajectory
FR2928324A1 (en) * 2008-03-04 2009-09-11 Peugeot Citroen Automobiles Sa Braking system i.e. electronic stability program braking system, for motor vehicle, has braking managing circuit comprising accumulator permitting generation of brake pressure independent of actions of driver on control device
FR2928326A1 (en) * 2008-03-04 2009-09-11 Peugeot Citroen Automobiles Sa Braking system e.g. electronic stability control braking system, for motor vehicle, has traction system for transmitting hydraulic energy from pump to accumulator in order to store energy in accumulator
EP2103493A1 (en) * 2008-03-20 2009-09-23 Peugeot Citroën Automobiles S.A. System for controlling the stability and the trajectory of an automotive vehicle using an active brake booster
FR2928889A1 (en) * 2008-03-20 2009-09-25 Peugeot Citroen Automobiles Sa STABILITY AND TRACK CONTROL SYSTEM OF A MOTOR VEHICLE USING AN ACTIVE SERVOFREIN

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