WO1999051476A1 - Electronically controlled brake system with a reservoir - Google Patents

Electronically controlled brake system with a reservoir Download PDF

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Publication number
WO1999051476A1
WO1999051476A1 PCT/EP1999/001464 EP9901464W WO9951476A1 WO 1999051476 A1 WO1999051476 A1 WO 1999051476A1 EP 9901464 W EP9901464 W EP 9901464W WO 9951476 A1 WO9951476 A1 WO 9951476A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake system
pump
check valve
suction side
space
Prior art date
Application number
PCT/EP1999/001464
Other languages
German (de)
French (fr)
Inventor
Dieter Dinkel
Axel Hinz
Original Assignee
Continental Teves Ag & Co. Ohg
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 Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Priority to EP99913238A priority Critical patent/EP1066183A1/en
Priority to JP2000542212A priority patent/JP2002510579A/en
Publication of WO1999051476A1 publication Critical patent/WO1999051476A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means

Definitions

  • the invention relates to an electronically controlled brake system with traction control (ASR) and / or electronic stability program (ESP), with an actuation unit, wheel brakes and a control unit between the actuation unit and the wheel brakes, the control unit having at least one pump with a suction side and a pressure side and a ASR or ESP changeover valve between the suction side of the pump and the actuation unit, wherein a memory is arranged between the changeover valve and the suction side of the pump and at least one check valve is provided on the suction side of the pump.
  • ASR electronically controlled brake system with traction control
  • ESP electronic stability program
  • ABS anti-lock braking system
  • ASR slip control of the driven wheels
  • ESP electronic stability program
  • a generic brake system is known for example from German patent application DE 195 19 832 AI.
  • a pulsation damper which serves to avoid large pressure fluctuations and to smooth out pressure peaks that can arise as a result of the brake control and put a heavy load on the brake system and can cause noise, has been integrated into a memory.
  • the invention has for its object to further simplify or improve known brake systems, but in particular to reduce the required volume of the hydraulic or electronic control unit of the brake.
  • At least one of the check valves on the suction side of the pump is additionally formed on the memory.
  • the integration of the check valve in the accumulator eliminates the need to provide a mounting space for the valve elsewhere in the pump housing or at another point in the control unit, the accumulator and valve taken together practically not taking up much more space than a conventional accumulator alone.
  • the combination of these components has the further advantage that a preassembled assembly is created, which is much cheaper in final assembly than two separate assemblies.
  • the damping is only effective in the slip control of the drive wheels and in the automatic vehicle stability control, the volume requirements playing a rather subordinate role.
  • 1 is a schematic circuit diagram of an electronically controlled brake system
  • Fig. 2 shows a section through a first embodiment of a memory in which a check valve is arranged according to the invention
  • Fig. 3 shows a section through a second embodiment of the memory of a brake system according to the invention.
  • FIG. 1 shows an electronic brake system, such as is present in motor vehicles, for example, which in addition to an anti-lock braking system also has a traction control system (ASR) and / or an electronic stability program (ESP).
  • ASR traction control system
  • ESP electronic stability program
  • a control unit 28 is arranged between an actuation unit 26 and the wheel brakes 27, said control unit not comprising lines, valves, 4 -
  • a changeover valve 32 is provided between the suction side 30 of the pump 29 and the actuation unit 26.
  • Several check valves 7, 8, 35 and at least one low-pressure accumulator 34 are arranged on the suction side 30 of the pump 29 in a known manner.
  • a pulsation damper (not shown in FIG. 1) can also be provided between the changeover valve 32 and the suction side 30 of the pump 29.
  • a space 1 for brake fluid is formed in a housing 25, said space sealingly delimiting on one side by a spring-loaded, displaceable piston 2 and on the other side via a channel 9 with the one shown in FIG 1 shown pump 29 is connected.
  • the space 1 can also be connected to the wheel brakes 27 via a second channel 3.
  • the check valve 7 is provided on the accumulator 34, in particular between the space 1 and the channel 3.
  • the check valve 7 can be formed on the piston 2 with particular advantage.
  • This combination of accumulator 34 and valve 7 is preferably designed in such a way that the piston 2 has an externally circumferential groove-like recess 10, into which an annular sleeve 11 with a sealing lip 12 abutting the wall of the space 1 is inserted, which is located between the channels 3 and 9 to the wheel brakes 27 or to the pump 29 acts as a check valve 7 with a pressure maintenance function.
  • a pulsation damper is provided in the memory 34, which comprises an elastic membrane 4, a gas storage space 6, a support disk 16 for holding and clamping the membrane 4 in the piston 2 at the edge, and a bore 17 in the support disk 16.
  • the membrane 4 is provided for damping pressure pulsations between the space 1 for brake fluid and a storage space 15 of the storage 34, which is preferably formed in the piston 2.
  • the preferably designed as a throttle bore 17 between the storage space 15 and the gas storage space 6 serves for ventilation of the gas storage space 6.
  • the support plate 16 serves as an abutment for a spring 18.
  • the storage space 15 serves as a second abutment for the spring 18 Cover 19 which closes on the outside and is fastened in the housing 25 of the store 34 and preferably has an opening 20. Seals or retaining rings 21, 22 can be arranged between the piston 2 and the cover 19 on the one hand and the housing wall 25 on the other hand.
  • the check valve 8 arranged according to the invention on the accumulator 34 is designed differently than the valve 7 in the embodiment according to FIG. 2. It has a channel 13 formed in the piston 1, which provides a possible connection between the channels 3 and 9 of the room 1 to the wheel brakes 27 shown in FIG. 1 or to the suction side 30 of the pump 29 also shown there.
  • a closing member 14 is arranged in the form of a ball, which is biased in the closing direction by means of a spring 23 supported on a fastening disk 24 with a guide. All other details of FIG. 3 correspond to those of the exemplary embodiment according to FIG. 2. In the exemplary embodiment according to FIG. 3, only a second seal 21 is provided.

Abstract

The invention relates to an electronically controlled brake system comprising a traction control system (TCS) and/or an electronic stability program (ESP), an actuating unit (26), wheel brakes (27), and a control unit (28). Said control unit is situated between the actuating unit (26) and the wheel brakes (27). The control unit (28) comprises at least one pump (29) having a suction side (30) and a delivery side (31). The control unit also has a TCS or ESP change-over valve (32) situated between the suction side (30) of the pump (29) and the actuating unit (26). A reservoir (34) is arranged between the change-over valve (32) and the suction side (30) of the pump (29), and at least one check valve (7, 8) is provided on the suction side (30) of the pump (29). In order to further optimize such brake systems, the check valve (7, 8) is provided on the reservoir (34).

Description

Elektronisch geregelte Bremsanlage mit SpeicherElectronically controlled brake system with memory
Die Erfindung betrifft eine elektronisch geregelte Bremsanlage mit Antriebsschlupfregelung (ASR) und/oder elektronischem Stabilitätsprogramm (ESP), mit einer Betätigungseinheit, Radbremsen und einer Regeleinheit zwischen der Betätigungseinheit und den Radbremsen, wobei die Regeleinheit zumindest eine Pumpe mit einer Saugseite und einer Druckseite und ein ASR- bzw. ESP-Umschaltventil zwischen der Saugseite der Pumpe und der Betätigungseinheit aufweist, wobei zwischen dem Umschaltventil und der Saugseite der Pumpe ein Speicher angeordnet ist und auf der Saugseite der Pumpe zumindest ein Rückschlagventil vorgesehen ist.The invention relates to an electronically controlled brake system with traction control (ASR) and / or electronic stability program (ESP), with an actuation unit, wheel brakes and a control unit between the actuation unit and the wheel brakes, the control unit having at least one pump with a suction side and a pressure side and a ASR or ESP changeover valve between the suction side of the pump and the actuation unit, wherein a memory is arranged between the changeover valve and the suction side of the pump and at least one check valve is provided on the suction side of the pump.
Ausgehend von dem seit langem eingeführten Antiblockiersy- stem (ABS) hat man Bremsanlagen für Kraftfahrzeuge mit weiteren Funktionen ausgestattet, wie beispielsweise der Schlupfregelung der angetriebenen Räder (ASR) und der automatische Fahrstabilitätsregelung bzw. dem elektronischen Stabilitätsprogramm (ESP). Dementsprechend mußten auch die zugehörigen Anlageteile erweitert werden. Dabei ist man bestrebt, den erforderlichen Bauraum nicht unnötig zu vergrößern, d.h. durch Verkleinern der Bauteile und Zusammenfassung von Bauteilen als Bau- bzw. Funktionseinheiten bei den erweiterten Anlagen möglichst nicht mehr Platz zu beanspruchen, als bei einfachen bzw. lediglich mit ABS ausgestatteten Bremsanlagen. - 2 -Starting from the long-established anti-lock braking system (ABS), braking systems for motor vehicles have been equipped with additional functions, such as the slip control of the driven wheels (ASR) and the automatic driving stability control or the electronic stability program (ESP). Accordingly, the associated parts of the system had to be expanded. It is endeavored not to unnecessarily enlarge the required installation space, that is to say, by reducing the size of the components and combining components as structural or functional units in the expanded systems, as little as possible to take up more space than in the case of simple or only ABS-equipped brake systems. - 2 -
Eine gattungsgemäße Bremsanlage ist beispielsweise aus der deutschen Patentanmeldung DE 195 19 832 AI bekannt. Hier ist ein Pulsationsdämpfer , der der Vermeidung von großen Druckschwankungen und der Glättung von Druckspitzen dient, die infolge der Bremsenregelung entstehen können und die Bremsanlage stark belasten sowie Geräusche verursachen können, in einen Speicher integriert worden.A generic brake system is known for example from German patent application DE 195 19 832 AI. Here, a pulsation damper, which serves to avoid large pressure fluctuations and to smooth out pressure peaks that can arise as a result of the brake control and put a heavy load on the brake system and can cause noise, has been integrated into a memory.
Der Erfindung liegt die Aufgabe zugrunde, bekannte Bremsanlagen weiter zu vereinfachen bzw. verbessern, insbesondere aber das erforderliche Bauvolumen der hydraulischen bzw. elektronischen Regeleinheit der Bremse zu verringern.The invention has for its object to further simplify or improve known brake systems, but in particular to reduce the required volume of the hydraulic or electronic control unit of the brake.
Zur Lösung der Aufgabe wird vorgeschlagen, daß bei einer bekannten Bremsanlage zusätzlich zumindest eines der Rückschlagventile auf der Saugseite der Pumpe am Speicher ausgebildet ist.To solve the problem it is proposed that in a known brake system at least one of the check valves on the suction side of the pump is additionally formed on the memory.
Durch die Integration des Rückschlagventils in den Speicher entfällt die Notwendigkeit, für das Ventil anderweitig im Pumpengehäuse bzw. an einer anderen Stelle der Regeleinheit einen Montageraum vorsehen zu müssen, wobei Speicher und Ventil zusammengenommen praktisch nicht viel mehr Platz beanspruchen, als ein herkömmlicher Speicher allein. Die Zusammenfassung dieser Bauteile hat des weiteren den Vorteil, daß eine vormontierbare Baugruppe entsteht, die in der Endmontage wesentlich preisgünstiger ist als zwei gesonderte Baugruppen.The integration of the check valve in the accumulator eliminates the need to provide a mounting space for the valve elsewhere in the pump housing or at another point in the control unit, the accumulator and valve taken together practically not taking up much more space than a conventional accumulator alone. The combination of these components has the further advantage that a preassembled assembly is created, which is much cheaper in final assembly than two separate assemblies.
Wird in den Speicher zusätzlich noch ein Pulsationsdämpfer integriert, so werden die Dauerfestigkeitsanforderungen an das System erheblich reduziert. Die Dämpfung soll nur bei relativ hohen Drücken wirksam sein, gleichzeitig aber möglichst wenig Volumen in Anspruch nehmen. Diese konstruktiv nur sehr schwierig zu verwirklichenden Bedingungen werden bei der gewählten Anordnung jedoch relativ einfach realisierbar, weil 3 -If a pulsation damper is also integrated in the memory, the fatigue strength requirements for the system are significantly reduced. The damping should only be effective at relatively high pressures, but at the same time take up as little volume as possible. These conditions, which are very difficult to achieve in terms of construction, are relatively easy to implement in the chosen arrangement because 3 -
die Dämpfung nur bei der Schlupfregelung der Antriebsräder und bei der automatischen Fahrzeugstabili-tätsregelung wirksam wird, wobei die Volumenanforderungen eine eher untergeordnete Rolle spielen.the damping is only effective in the slip control of the drive wheels and in the automatic vehicle stability control, the volume requirements playing a rather subordinate role.
Dabei ist es ohne weiteres möglich, die Anordnung des Speichers bzw. Pulsationsdämpfers zwischen dem elektrischen Umschaltventil und der Saugseite der Pumpe beizubehalten und die damit verbundenen Vorteile zu realisieren. Bei Normalbremsung und bei der ABS-Funktion muß von der Betätigungseinheit dann kein zusätzliches Volumen mehr bereitgestellt werden, d.h. das sogenannte "weiche Pedal" wird vermieden.It is easily possible to maintain the arrangement of the accumulator or pulsation damper between the electrical changeover valve and the suction side of the pump and to realize the associated advantages. With normal braking and with the ABS function, the actuating unit no longer has to provide any additional volume, i.e. the so-called "soft pedal" is avoided.
Zweckmäßige Aus- und Weiterbildungen des Erfindungsgedankens sind in den Unteransprüchen beschrieben. Weitere Einzelheiten werden anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Es zeigenAppropriate training and further developments of the inventive concept are described in the subclaims. Further details are explained in more detail using the exemplary embodiments shown in the figures. Show it
Fig. 1 einen schematischen Schaltplan einer elektronisch geregelten Bremsanlage,1 is a schematic circuit diagram of an electronically controlled brake system,
Fig. 2 einen Schnitt durch eine erste Ausführungsform eines Speichers, in dem erfindungsgemäß ein Rückschlagventil angeordnet ist undFig. 2 shows a section through a first embodiment of a memory in which a check valve is arranged according to the invention and
Fig. 3 einen Schnitt durch eine zweite Ausführungsform des Speichers einer erfindungsgemäßen Bremsanlage.Fig. 3 shows a section through a second embodiment of the memory of a brake system according to the invention.
In Fig. 1 ist eine elektronische Bremsanlage gezeigt, wie sie beispielsweise in Kraftfahrzeugen vorhanden ist, die neben einem Antiblockiersystem auch eine Antriebsschlupfregelung (ASR) und/oder ein elektronisches Stabilitätsprogramm (ESP) aufweisen. Bei derartigen Bremsanlagen ist zwischen einer Betätigungseinheit 26 und den Radbremsen 27 eine Regeleinheit 28 angeordnet, die nicht näher bezeichnete Leitungen, Venti- 4 -1 shows an electronic brake system, such as is present in motor vehicles, for example, which in addition to an anti-lock braking system also has a traction control system (ASR) and / or an electronic stability program (ESP). In brake systems of this type, a control unit 28 is arranged between an actuation unit 26 and the wheel brakes 27, said control unit not comprising lines, valves, 4 -
le, Filter und Speicher sowie zumindest eine von einem Motor angetriebene Pumpe 29 mit einer Saugseite 30 und einer Druckseite 31 umfaßt. Beispielsweise in der DE 195 19 832 AI ist eine derartige Bremsanlage näher beschrieben.le, filter and memory and at least one motor-driven pump 29 having a suction side 30 and a pressure side 31. Such a brake system is described in more detail, for example, in DE 195 19 832 AI.
Insbesondere bei einer Bremsanlage mit Antriebsschlupfregelung ist zwischen der Saugseite 30 der Pumpe 29 und der Betätigungseinheit 26 ein Umschaltventil 32 vorgesehen. Auf der Saugseite 30 der Pumpe 29 sind in bekannter Weise mehrere Rückschlagventile 7, 8, 35 sowie zumindest ein Niederdruckspeicher 34 angeordnet. Zur Dämpfung von Druckpulsationen und somit zur Geräuschminderung kann des weiteren zwischen dem Umschaltventil 32 und der Saugseite 30 der Pumpe 29 ein in Fig. 1 nicht dargestellter Pulsationsdämpfer vorgesehen sein.In particular in a brake system with traction control system, a changeover valve 32 is provided between the suction side 30 of the pump 29 and the actuation unit 26. Several check valves 7, 8, 35 and at least one low-pressure accumulator 34 are arranged on the suction side 30 of the pump 29 in a known manner. To dampen pressure pulsations and thus to reduce noise, a pulsation damper (not shown in FIG. 1) can also be provided between the changeover valve 32 and the suction side 30 of the pump 29.
Bei dem in Figur 2 näher dargestellten Speicher 34 ist in einem Gehäuse 25 ein Raum 1 für Bremsflüssigkeit ausgebildet, der auf der einen Seite von einem federbelasteten, verschieb- lichen Kolben 2 abdichtend begrenzt und auf der anderen Seite über einen Kanal 9 mit der in Fig. 1 dargestellten Pumpe 29 verbunden ist. Der Raum 1 ist des weiteren über einen zweiten Kanal 3 mit den Radbremsen 27 verbindbar.In the accumulator 34 shown in more detail in FIG. 2, a space 1 for brake fluid is formed in a housing 25, said space sealingly delimiting on one side by a spring-loaded, displaceable piston 2 and on the other side via a channel 9 with the one shown in FIG 1 shown pump 29 is connected. The space 1 can also be connected to the wheel brakes 27 via a second channel 3.
Erfindungsgemäß ist das Rückschlagventil 7 am Speicher 34, insbesondere zwischen dem Raum 1 und dem Kanal 3, vorgesehen. Dabei kann das Rückschlagventil 7 mit besonderem Vorteil am Kolben 2 ausgebildet sein. Diese Zusammenfassung von Speicher 34 und Ventil 7 ist vorzugsweise derart ausgebildet, daß der Kolben 2 eine außen umlaufende nutartige Ausnehmung 10 aufweist, in die eine ringförmige Manschette 11 mit einer an der Wandung des Raums 1 anliegenden Dichtlippe 12 eingesetzt ist, die zwischen den Kanälen 3 und 9 zu den Radbremsen 27 bzw. zur Pumpe 29 als Rückschlagventil 7 mit Druckhaltefunktion wirkt. - 5 -According to the invention, the check valve 7 is provided on the accumulator 34, in particular between the space 1 and the channel 3. The check valve 7 can be formed on the piston 2 with particular advantage. This combination of accumulator 34 and valve 7 is preferably designed in such a way that the piston 2 has an externally circumferential groove-like recess 10, into which an annular sleeve 11 with a sealing lip 12 abutting the wall of the space 1 is inserted, which is located between the channels 3 and 9 to the wheel brakes 27 or to the pump 29 acts as a check valve 7 with a pressure maintenance function. - 5 -
Außerdem ist im Speicher 34 ein Pulsationsdämpfer vorgesehen, der eine elastische Membran 4, einen Gasspeicherraum 6, eine Stützscheibe 16 zur Halterung und randseitigen Einspannung der Membran 4 im Kolben 2 sowie eine Bohrung 17 in der Stützscheibe 16 umfaßt. Dabei ist die Membran 4 zur Dämpfung von Druckpulsationen zwischen dem Raum 1 für Bremsflüssigkeit und einem vorzugsweise im Kolben 2 ausgebildeten Speicherraum 15 des Speichers 34 vorgesehen. Die vorzugsweise als Drosselbohrung ausgebildete Bohrung 17 zwischen dem Speicherraum 15 und dem Gasspeicherraum 6 dient zur Be- und Entlüftung des Gasspeicherraums 6. Außerdem dient die Stützscheibe 16 als Widerlager für eine Feder 18. Als zweites Widerlager für die Feder 18 dient ein den Speicherraum 15 nach außen abschließender und im Gehäuse 25 des Speichers 34 befestigter Deckel 19, der vorzugsweise eine Öffnung 20 aufweist. Zwischen Kolben 2 und Deckel 19 einerseits sowie der Gehäusewandung 25 andererseits können Dichtungen bzw. Sicherungsringe 21, 22 angeordnet sein.In addition, a pulsation damper is provided in the memory 34, which comprises an elastic membrane 4, a gas storage space 6, a support disk 16 for holding and clamping the membrane 4 in the piston 2 at the edge, and a bore 17 in the support disk 16. The membrane 4 is provided for damping pressure pulsations between the space 1 for brake fluid and a storage space 15 of the storage 34, which is preferably formed in the piston 2. The preferably designed as a throttle bore 17 between the storage space 15 and the gas storage space 6 serves for ventilation of the gas storage space 6. In addition, the support plate 16 serves as an abutment for a spring 18. The storage space 15 serves as a second abutment for the spring 18 Cover 19 which closes on the outside and is fastened in the housing 25 of the store 34 and preferably has an opening 20. Seals or retaining rings 21, 22 can be arranged between the piston 2 and the cover 19 on the one hand and the housing wall 25 on the other hand.
Bei der Ausführungsform gemäß Figur 3 ist lediglich das erfindungsgemäß am Speicher 34 angeordnete Rückschlagventil 8 anders ausgebildet als das Ventil 7 bei der Ausführungsform gemäß Figur 2. Es weist hier einen im Kolben 1 ausgebildeten Kanal 13 auf, der eine mögliche Verbindung zwischen den Kanälen 3 und 9 des Raums 1 zu den in Fig. 1 dargestellten Radbremsen 27 bzw. zur dort ebenfalls gezeigten Saugseite 30 der Pumpe 29 bildet. Im Kanal 13 ist ein Schließglied 14 in Form einer Kugel angeordnet, die mittels einer auf einer Befestigungsscheibe 24 mit Führung abgestützten Feder 23 in Schließrichtung vorgespannt ist. Alle übrigen Einzelheiten von Fig. 3 entsprechen denen des Ausführungsbeispiels gemäß Figur 2. Im Ausführungsbeispiel gemäß Fig. 3 ist lediglich noch eine zweite Dichtung 21 vorgesehen. In the embodiment according to FIG. 3, only the check valve 8 arranged according to the invention on the accumulator 34 is designed differently than the valve 7 in the embodiment according to FIG. 2. It has a channel 13 formed in the piston 1, which provides a possible connection between the channels 3 and 9 of the room 1 to the wheel brakes 27 shown in FIG. 1 or to the suction side 30 of the pump 29 also shown there. In the channel 13, a closing member 14 is arranged in the form of a ball, which is biased in the closing direction by means of a spring 23 supported on a fastening disk 24 with a guide. All other details of FIG. 3 correspond to those of the exemplary embodiment according to FIG. 2. In the exemplary embodiment according to FIG. 3, only a second seal 21 is provided.

Claims

- 6 -Patentansprüche : - 6 patent claims:
1. Elektronisch geregelte Bremsanlage mit Antriebsschlupfregelung (ASR) und/oder elektronischem Stabilitätsprogramm (ESP), mit einer Betätigungseinheit (26), Radbremsen (27) und einer Regeleinheit (28) zwischen der Betätigungseinheit (26) und den Radbremsen (27), wobei die Regeleinheit (28) zumindest eine Pumpe (29) mit einer Saugseite (30) und einer Druckseite (31) und ein ASR- bzw. ESP-Umschaltventil (32) zwischen der Saugseite (30) der Pumpe (29) und der Betätigungseinheit (26) aufweist, wobei zwischen dem Umschaltventil (32) und der Saugseite1. Electronically controlled brake system with traction control (ASR) and / or electronic stability program (ESP), with an actuation unit (26), wheel brakes (27) and a control unit (28) between the actuation unit (26) and the wheel brakes (27), wherein the control unit (28) has at least one pump (29) with a suction side (30) and a pressure side (31) and an ASR or ESP changeover valve (32) between the suction side (30) of the pump (29) and the actuation unit ( 26), wherein between the changeover valve (32) and the suction side
(30) der Pumpe (29) ein Speicher (34) angeordnet ist und auf der Saugseite (30) der Pumpe (29) zumindest ein Rückschlagventil (7, 8, 35) vorgesehen ist, dadurch gekennzeichnet, daß das Rückschlagventil (7, 8) am Speicher (34) vorgesehen ist.(30) of the pump (29) there is a store (34) and at least one check valve (7, 8, 35) is provided on the suction side (30) of the pump (29), characterized in that the check valve (7, 8 ) is provided on the memory (34).
2. Bremsanlage nach Anspruch 1, dadurch gekennzeichnet, daß der Speicher (34) einen Raum (1) für Bremsflüssigkeit und einen Speicherraum (15) aufweist, wobei die Räume (1, 15) mittels eines Kolbens (2) getrennt sind und das Rückschlagventil (7, 8) am Kolben (2) ausgebildet ist.2. Brake system according to claim 1, characterized in that the memory (34) has a space (1) for brake fluid and a storage space (15), the spaces (1, 15) being separated by means of a piston (2) and the check valve (7, 8) on the piston (2) is formed.
3. Bremsanlage nach Anspruch 2, dadurch gekennzeichnet, daß der Raum (1) über das Rückschlagventil (7, 8) und einen Kanal (3) mit den Radbremsen (27) verbindbar ist.3. Brake system according to claim 2, characterized in that the space (1) via the check valve (7, 8) and a channel (3) with the wheel brakes (27) can be connected.
4. Bremsanlage nach Anspruch 2, dadurch gekennzeichnet, daß der Raum (1) über einen Kanal (9) mit der Pumpe (29) verbunden ist. - 7 -4. Brake system according to claim 2, characterized in that the space (1) via a channel (9) with the pump (29) is connected. - 7 -
5. Bremsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als Rückschlagventil (7) eine ringförmige Manschette (11) mit einer Dichtlippe (12) vorgesehen ist, die in einer außen umlaufenden, nutartigen Ausnehmung (10) des Kolbens (2) angeordnet ist.5. Brake system according to one of the preceding claims, characterized in that an annular sleeve (11) with a sealing lip (12) is provided as a check valve (7), which is arranged in an outer circumferential, groove-like recess (10) of the piston (2) is.
6. Bremsanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zwischen dem Raum (1) und dem Kanal6. Brake system according to one of claims 1 to 4, characterized in that between the space (1) and the channel
(3) im Kolben (2) ein Kanal (13) vorgesehen ist, in dem als Rückschlagventil (8) ein federbelastetes Schließglied (14) vorgesehen ist.(3) a channel (13) is provided in the piston (2), in which a spring-loaded closing element (14) is provided as a check valve (8).
7. Bremsanlage nach Anspruch 2, dadurch gekennzeichnet, daß im Speicher (34) ein Pulsationsdämpfer (4, 6, 16, 17) vorgesehen ist.7. Brake system according to claim 2, characterized in that a pulsation damper (4, 6, 16, 17) is provided in the memory (34).
8. Bremsanlage nach Anspruch 7, dadurch gekennzeichnet, daß der Pulsationsdämpfer eine elastische Membran (4), eine Stützscheibe (16), die im Kolben (2) randseitig eingefaßt ist, und einen Gasspeicherraum (6) zwischen Membran8. Brake system according to claim 7, characterized in that the pulsation damper has an elastic membrane (4), a support disc (16) which is edged in the piston (2) on the edge, and a gas storage space (6) between the membrane
(4) und Stützscheibe (16) umfaßt.(4) and support disc (16).
9. Bremsanlage nach Anspruch 8, dadurch gekennzeichnet, daß die Stützscheibe (16) eine Bohrung (17) aufweist, mittels derer Speicherraum (15) und Gasspeicherraum (6) verbunden sind.9. Brake system according to claim 8, characterized in that the support disc (16) has a bore (17) by means of which the storage space (15) and gas storage space (6) are connected.
10. Bremsanlage nach Anspruch 8, dadurch gekennzeichnet, daß die Stützscheibe (16) als Widerlager für eine Feder (18) ausgebildet ist.10. Brake system according to claim 8, characterized in that the support disc (16) is designed as an abutment for a spring (18).
11. Bremsanlage nach einem der Anspruch 10, dadurch gekennzeichnet, daß als zweites Widerlager für die Feder (18) ein den zylindrischen Speicherraum (15) nach außen abschließender, im Speicher (34) befestigter Deckel (19) vorgesehen ist.11. Brake system according to one of claim 10, characterized in that as a second abutment for the spring (18) a cylindrical storage space (15) to the outside, in the storage (34) attached cover (19) is provided.
12. Bremsanlage nach Anspruch 11, dadurch gekennzeichnet, daß der Deckel (19) eine Öffnung (20) aufweist. 12. Brake system according to claim 11, characterized in that the cover (19) has an opening (20).
PCT/EP1999/001464 1998-04-02 1999-03-08 Electronically controlled brake system with a reservoir WO1999051476A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99913238A EP1066183A1 (en) 1998-04-02 1999-03-08 Electronically controlled brake system with a reservoir
JP2000542212A JP2002510579A (en) 1998-04-02 1999-03-08 Electronically controlled brake system with accumulator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19814835.6 1998-04-02
DE1998114835 DE19814835A1 (en) 1998-04-02 1998-04-02 Electronically controlled brake system with memory

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JP (1) JP2002510579A (en)
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JP5558175B2 (en) * 2010-04-05 2014-07-23 ボッシュ株式会社 Vehicle brake device
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JP6521589B2 (en) * 2014-08-07 2019-05-29 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Vehicle brake system
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EP1066183A1 (en) 2001-01-10
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