EP1251282B1 - Système de freinage de véhicule avec un accumulateur hydraulique à gaz - Google Patents

Système de freinage de véhicule avec un accumulateur hydraulique à gaz Download PDF

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Publication number
EP1251282B1
EP1251282B1 EP02016285A EP02016285A EP1251282B1 EP 1251282 B1 EP1251282 B1 EP 1251282B1 EP 02016285 A EP02016285 A EP 02016285A EP 02016285 A EP02016285 A EP 02016285A EP 1251282 B1 EP1251282 B1 EP 1251282B1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure accumulator
gas
gas pressure
fluid
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.)
Expired - Lifetime
Application number
EP02016285A
Other languages
German (de)
English (en)
Other versions
EP1251282A3 (fr
EP1251282A2 (fr
Inventor
Kurt Mohr
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.)
Lucas Varity GmbH
Original Assignee
Lucas Varity 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 Lucas Varity GmbH filed Critical Lucas Varity GmbH
Publication of EP1251282A2 publication Critical patent/EP1251282A2/fr
Publication of EP1251282A3 publication Critical patent/EP1251282A3/fr
Application granted granted Critical
Publication of EP1251282B1 publication Critical patent/EP1251282B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B1/22—Liquid port constructions
    • 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
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • 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
    • F15B2201/30—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
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • 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
    • F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder
    • 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
    • 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
    • F15B2201/415—Gas ports
    • 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
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means

Definitions

  • the invention relates to a gas pressure accumulator for a vehicle brake system, the one Housing, whose interior by a metal bellows and on the metal bellows gas-tight mounted disc in a gas-filled gas space and a Fluid space is divided, wherein the fluid space through a supply line, a fluid under pressure can be supplied and removed, and between the fluid space and the supply line Valve arrangement is provided which closes when the pressure in the supply line Minimum value, and opens when the pressure exceeds the minimum value, wherein the metal bellows performs a lifting movement during the supply and removal of the fluid, by means of which the valve arrangement is actuated. Furthermore, the invention relates to a equipped with such a gas pressure accumulator vehicle brake system.
  • the fluid space such gas pressure accumulator is in operation of the vehicle brake system partially or completely filled with brake fluid against the pressure in the gas space to this save.
  • DE 1 232 418 describes a hydro-pneumatic pressure accumulator, which is a cylindrical Housing and projecting into the housing central guide tube comprises.
  • outlet openings allow the Zu- or Discharge of fluid into and out of a fluid space from one of the guide tube surrounding elastic partition as well as a sealing with the elastic Dividing wall connected closing body is limited.
  • the closing body slides under deformation of the Partition with low friction on the guide tube.
  • US 3,939,872 discloses a pressure accumulator comprising a housing, one in the housing arranged metal bellows and connected to the metal bellows cone includes. With a supply of fluid in a formed in the housing and through the cone-bounded chamber is due to the cone connected to a rod shifted the fluid pressure, whereby the metal bellows is compressed. The with the Cone-linked rod is in a from an upper wall of the housing led extending projection.
  • the object of the invention is therefore to provide a compact, safe and reliable Gas pressure accumulator for a vehicle brake system and one with such Gas pressure accumulator equipped vehicle brake system provide.
  • the object is achieved by a gas pressure accumulator of the aforementioned Art solved, having the features of claim 1. Further, the task is by a vehicle brake system equipped with such a gas pressure accumulator solved. Since the metal bellows when supplying and discharging the fluid a lifting movement performs, by means of which the valve assembly is actuated is the completion of the Fluid space directly coupled with the movement of the metal bellows, creating a in Closed safety system is formed.
  • a piston is preferably performed in the hollow cylinder.
  • the hollow cylinder to be guided on a piston. This is a guided movement the piston and the sealing seats formed on the hollow cylinder relative to each other possible and at the same time is a compact design of the gas pressure accumulator achieved.
  • An advantageous embodiment provides that the lifting movement of the metal bellows of Two end stops is limited to defined end positions for the moving components pretend. In the end positions, the valve assembly is at the same time each closed.
  • At least one end stop is advantageous a seal or a sealing seat educated.
  • a redundant seal is formed on the end stop, which allows a particularly good seal.
  • the redundant sealing becomes special Advantageously arranged on the end stop, which is the basic position of the piston limited.
  • the gas pressure accumulator is particularly well sealed when the pressure in the supply line is less than the permissible minimum pressure.
  • the pressure in the Supply line the so-called system pressure of the vehicle brake system, in particular for longer vehicle downtime below this minimum pressure, the so-called Gas pressure, sink.
  • the gas pressure accumulator may also be provided with a valve arrangement which with but at least one redundant seal is provided at an end stop does not have the dual function described above.
  • the piston touches as a closing element in a closing movement first a first sealing seat and seals at this.
  • the piston touches a second sealing seat, which forms an end stop for the closing element, and seals redundantly at this.
  • the first sealing seat may be one of those described above Corresponding sealing surfaces.
  • the piston advantageously arranged at least one seal against at least one Sealing seat can seal.
  • gas pressure accumulator 10 has a cup-shaped Housing 12, which is closed by a cover 14.
  • the interior of the Housing 12 is of a subsequent to the lid 14 metal bellows 16 and a gas-tight attached disc 18 in a gas space 20 and a fluid space 22nd divided.
  • the gas space 20 is filled with a pressurized gas.
  • the lid 14 is pierced by a supply line 24, through which the fluid space 22 a fluid is supplied when the pressure in the supply line 24 increases. The fluid is in the fluid space 22 stored and discharged from this when the pressure in the supply line 24 drops.
  • the housing 12 has a cylindrical outer wall 26 with a longitudinal axis 28.
  • To the outer wall 26 includes a disc-shaped end wall 30, in the coaxial a threaded bore 32 is formed, through which in the gas space 20, the gas with can be supplied to a so-called gas supply pressure.
  • the threaded bore 32 is closed with a screw plug 34 which rests on a sealing washer 36.
  • the lid 14 has a disc-shaped closure portion 38 which by means of a circumferentially formed paragraph 40 in the outer wall 26 of the housing 12 centered and supported on this.
  • the disc-shaped closure portion 38 is connected to the outer wall 26 by a weld 42 gas-tight.
  • Fig. 1 are at the interior of the Housing 12 facing side of the closure portion 38 coaxial with a hollow cylinder 44 and a mandrel 46 integrally formed.
  • a terminal 48 integrally formed by the in essential axially directed bores 50, 52 and 54 with the interior of the Housing 12 is connected.
  • the metal bellows 16 is folded, substantially cylindrical and at its two axial ends through welds 56 and 58 with the closure portion 38 and the disc 18 connected gas-tight.
  • the disc 18 is directed normal to the axis and with a coaxial rod 60 in one piece connected, in which an axial bore 62 is formed, by means of which the rod 60th is guided on the mandrel 46.
  • a piston 64 To the rod 60 integrally connects a piston 64, whose diameter is larger than that of the rod 60.
  • sealing surfaces 66 and 68 are formed, which are axially directed and each form a sealing seat.
  • Axial between the sealing surfaces 66 and 68 is a recess 70 formed on the inner circumference of the hollow cylinder 44, so that its Diameter in this area greater than the diameter of the sealing seats on the Sealing surfaces 66 and 68 is.
  • the piston 64 has a circumferential groove in which a seal 72 in the form of a Sealing ring is inserted or injected.
  • the gasket 72 is formed to be cooperates with the sealing surface 66 or 68 and thereby a valve assembly 74th forms, which can seal two times liquid-tight.
  • Fig. 1 the metal bellows 16 is shown in a position in which almost no fluid is stored in the gas pressure accumulator 10, so the pressure in the fluid space 22 its Minimum value, the gas form has reached.
  • the piston 64 is here almost in a normal position, in which the seal 72 bears against the sealing surface 66 and seals at this.
  • the hollow cylinder 44th and the closure portion 38 of the lid 14 created a so-called vestibule 76, the only connected through the bore 52 to the terminal 48, otherwise but is complete.
  • the valve assembly is thus between the supply line 24 and the fluid space 22 is closed. As from the fluid space 22 no fluid in the vestibule 76 can remain, even with a drop in pressure at port 48 of Pressure in the fluid space 22 constant and limited to the minimum value.
  • the metal bellows 16 is thus safe against damage due to pressure drop protected.
  • the piston 64 with the seal 72 each slide along an axial stroke X 1 and X 2 .
  • the seal remains, while a low pressure equalization between the fluid chamber 22 and the vestibule 76 is possible. In this way, elasticity and thermal expansion can be compensated as described above.
  • a Seal 82 is used, which, together with one on the piston 64 opposite trained sealing seat 84 a redundant sealing of the piston 64 in the Basic position forms.
  • the seal 82 may alternatively be inserted in the piston 64.
  • an end stop 86 is formed inside, against which the Disc 18 in relation to FIG. 1 upper end position of the piston 64 abuts.
  • Fig. 2 shows an embodiment of a gas pressure accumulator 10, which is similar to is shown in Fig. 1 is constructed.
  • this gas pressure accumulator 10 is the Disc 18 integrally connected to the rod 60 and a hollow cylinder 44 '.
  • the Rod 60 is axially slidably guided in a bore 54 'of the mandrel 46 and of a hole 62 'passes, which connects the bore 50 with the vestibule 76.
  • a piston 64' integrally formed at the hollow cylinder 44 'facing the end of the mandrel 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Systems And Boosters (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (8)

  1. Accumulateur hydraulique à gaz (10) pour système de freinage de véhicule, qui comprend un boítier (12) dont l'espace intérieur est partagé en deux par un soufflet métallique (16) et un disque (18) étanche au gaz fixé sur ledit soufflet (16) pour former une chambre à gaz (20) remplie de gaz et une chambre fluidique (22), un fluide sous pression pouvant sortir de la chambre fluidique ou y être amené à l'aide d'une conduite (24), et un clapet (74) étant prévu entre la chambre fluidique (22) et la conduite (24), lequel se ferme lorsque la pression dans la conduite (24) passe en dessous d'une valeur minimale et s'ouvre lorsque ladite pression passe au dessus de ladite valeur minimale, le soufflet métallique (16) effectuant au moment de l'entrée et de la sortie du fluide un mouvement ascendant (X) qui entraíne l'actionnement du clapet (74), le disque (18) étant relié d'un seul tenant à une tige (60, 60') dans laquelle est formé un alésage axial (62, 62'), la tige (60) étant guidée au moyen de l'alésage axial (62) de manière à se déplacer dans le sens axial sur une broche (46), ou la tige (60') étant guidée de manière à se déplacer dans le sens axial à l'intérieur d'un alésage (54') ménagé dans la broche (46), caractérisé en ce qu'un cylindre creux (44, 44') est relié au disque (18) ou au fond (38) du boítier (12), lequel cylindre creux s'étend co-axialement par rapport à la broche (46) et est disposé radialement à l'intérieur du soufflet métallique (16) conçu pour l'essentiel sous la forme d'un cylindre creux.
  2. Accumulateur hydraulique à gaz selon la revendication 1, un piston (64) étant guidé à l'intérieur du cylindre creux (44).
  3. Accumulateur hydraulique à gaz selon la revendication 1, le cylindre creux (44') étant guidé sur un piston (64').
  4. Accumulateur hydraulique à gaz selon l'une des revendications 1 à 3, un raccord (48) étant formé sur la face extérieure du fond (38) et relié par des alésages (50, 52, 54) à l'espace intérieur du boítier (12).
  5. Accumulateur hydraulique à gaz selon la revendication 2 ou 3 et la revendication 4, une préchambre (76) reliée par un alésage (52) audit raccord (48) étant formée entre le piston (64, 64'), le cylindre creux (44, 44') et le fond (38) du boítier (12) ou le disque (18).
  6. Accumulateur hydraulique à gaz selon la revendication 2 ou 3, le piston (64) étant relié d'un seul tenant à la tige (60) et le diamètre du piston (64) étant supérieur au diamètre de la tige (60).
  7. Accumulateur hydraulique à gaz selon la revendication 2 ou 3, le piston (64') étant relié d'un seul tenant à la broche (46) et le diamètre du piston (64') étant supérieur au diamètre de la broche (46).
  8. Système de freinage de véhicule équipé d'un accumulateur hydraulique à gaz (10) selon l'une des revendications précédentes.
EP02016285A 1999-11-11 2000-11-02 Système de freinage de véhicule avec un accumulateur hydraulique à gaz Expired - Lifetime EP1251282B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19954326A DE19954326B4 (de) 1999-11-11 1999-11-11 Fahrzeugbremsanlage mit einem Gasdruckspeicher
DE19954326 1999-11-11
EP00981234A EP1228318B1 (fr) 1999-11-11 2000-11-02 Dispositif de freinage pour vehicule, pourvu d'un reservoir de gaz comprime

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP00981234.8 Division 2000-11-02
EP00981234A Division EP1228318B1 (fr) 1999-11-11 2000-11-02 Dispositif de freinage pour vehicule, pourvu d'un reservoir de gaz comprime

Publications (3)

Publication Number Publication Date
EP1251282A2 EP1251282A2 (fr) 2002-10-23
EP1251282A3 EP1251282A3 (fr) 2003-07-02
EP1251282B1 true EP1251282B1 (fr) 2005-10-26

Family

ID=7928725

Family Applications (2)

Application Number Title Priority Date Filing Date
EP00981234A Expired - Lifetime EP1228318B1 (fr) 1999-11-11 2000-11-02 Dispositif de freinage pour vehicule, pourvu d'un reservoir de gaz comprime
EP02016285A Expired - Lifetime EP1251282B1 (fr) 1999-11-11 2000-11-02 Système de freinage de véhicule avec un accumulateur hydraulique à gaz

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP00981234A Expired - Lifetime EP1228318B1 (fr) 1999-11-11 2000-11-02 Dispositif de freinage pour vehicule, pourvu d'un reservoir de gaz comprime

Country Status (8)

Country Link
US (2) US6616247B2 (fr)
EP (2) EP1228318B1 (fr)
JP (2) JP2003514202A (fr)
AT (2) ATE307979T1 (fr)
AU (1) AU1855301A (fr)
DE (3) DE19954326B4 (fr)
ES (2) ES2206332T3 (fr)
WO (1) WO2001034984A2 (fr)

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JP6803271B2 (ja) * 2017-03-13 2020-12-23 日本発條株式会社 アキュムレータ
JP6975085B2 (ja) * 2018-03-29 2021-12-01 日本発條株式会社 アキュムレータの外殻部材及びその製造方法、並びに、アキュムレータ及びその製造方法
CN112112845B (zh) * 2020-10-10 2022-06-28 浙江奥莱尔液压有限公司 一种胶囊储能器
CN112303041B (zh) * 2020-10-30 2023-03-10 杰锋汽车动力***股份有限公司 波纹管蓄能器结构

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JP2000249101A (ja) * 1999-02-26 2000-09-12 Nhk Spring Co Ltd ダイヤフラムベローズを用いたアキュムレータ装置
DE19924807A1 (de) * 1999-05-29 2000-12-07 Hydac Technology Gmbh Hydropneumatischer Druckspeicher

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EP1228318A2 (fr) 2002-08-07
US20030038532A1 (en) 2003-02-27
EP1251282A3 (fr) 2003-07-02
US6616247B2 (en) 2003-09-09
DE50003583D1 (de) 2003-10-09
JP2003175819A (ja) 2003-06-24
EP1251282A2 (fr) 2002-10-23
US20020180260A1 (en) 2002-12-05
US6666529B2 (en) 2003-12-23
AU1855301A (en) 2001-06-06
DE50011469D1 (de) 2005-12-01
ATE307979T1 (de) 2005-11-15
DE19954326B4 (de) 2006-06-29
DE19954326A1 (de) 2001-05-23
WO2001034984A2 (fr) 2001-05-17
ATE248994T1 (de) 2003-09-15
ES2250552T3 (es) 2006-04-16
JP2003514202A (ja) 2003-04-15
ES2206332T3 (es) 2004-05-16
EP1228318B1 (fr) 2003-09-03
WO2001034984A3 (fr) 2001-10-18

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