EP2529121A1 - Piston accumulator - Google Patents

Piston accumulator

Info

Publication number
EP2529121A1
EP2529121A1 EP10800950A EP10800950A EP2529121A1 EP 2529121 A1 EP2529121 A1 EP 2529121A1 EP 10800950 A EP10800950 A EP 10800950A EP 10800950 A EP10800950 A EP 10800950A EP 2529121 A1 EP2529121 A1 EP 2529121A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
gas
piston
pressure vessel
piston accumulator
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.)
Granted
Application number
EP10800950A
Other languages
German (de)
French (fr)
Other versions
EP2529121B1 (en
Inventor
Ralph Engelberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2529121A1 publication Critical patent/EP2529121A1/en
Application granted granted Critical
Publication of EP2529121B1 publication Critical patent/EP2529121B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • F15B2201/405—Housings

Definitions

  • the present invention relates to a piston accumulator.
  • Piston accumulators are typically used to store large amounts of energy.
  • piston accumulators are used to store energy generated, for example, during braking of the wheels, and to release energy required, for example, when accelerating the vehicle.
  • Such a piston accumulator is described for example in the document DE 10 2006 060 078 A1.
  • the defined in claim 1 piston accumulator offers over conventional solutions has the advantage that the cylinder is under no significant tension, as applied to the inside and outside of the cylinder, the same pressure.
  • the cylinder can be formed from a non-pressure-stable and therefore lightweight material. Due to the fact that the cylinder does not deform, a tight seal is also ensured between the cylinder and the moving piston in this movable. Further, a leak in the cylinder does not leak hydraulic fluid into the environment because the hydraulic fluid is caught by the pressure vessel. Further, escapes in a leak in the pressure vessel only gas, such as nitrogen, which is harmless to the environment.
  • the sole figure of the drawing shows in a longitudinal section a piston accumulator 1 according to a preferred embodiment of the present invention.
  • the piston accumulator 1 has a pressure vessel 2.
  • the pressure vessel 2 may be composed of a base body 3 with a substantially annular cross-section and lids 4, 5, which close the base body 3 at its opposite ends.
  • a cylinder 6 is arranged within the pressure vessel 2.
  • the cylinder 6 preferably extends along the longitudinal axis 7 of the pressure vessel 2.
  • the cylinder 6 may consist of a base body 1 1 having a substantially annular cross-section and the base body 1 1 at its one end 12 closing lid 13 composed.
  • a separating piston 14 is provided movably.
  • the separating piston 14 is, as indicated by the double arrow in the figure, along the longitudinal axis 7 movable.
  • the separating piston 14 separates a hydraulic fluid 15 from a gas 16.
  • the hydraulic fluid 15 is located in a space 17 which is delimited by the main body 1 1, the cover 13 and an end face 18 of the separating piston 14.
  • the hydraulic fluid 15 can be supplied to the space 17 by means of a connection 22 or can be discharged therefrom. This makes it possible to pressurize the piston accumulator 1 with hydraulic fluid 15, for example, to store energy in this. Furthermore, it is possible to discharge hydraulic fluid 15 from the piston accumulator 1 in order thus to supply a load with energy.
  • the gas 16 is located in a space 24 which is bounded by an end face 18 opposite the end face 23 of the separating piston 14 and the base body 1 1.
  • the space 24 is connected to a gap 25 by means of an opening 26, so that the gas 16 can flow between the space 24 and the intermediate space 25.
  • the gap 25 is formed between the cylinder 6 and the pressure vessel 2.
  • the intermediate space 25 may in particular comprise an annular space 27 which surrounds the cylinder 6 along the longitudinal axis 7.
  • the intermediate space 25 may further include spaces 31 and 32 in the region of the covers 4 and 5, respectively.
  • the intermediate space 25 can also be connected by means of a connection 33 to the pressure vessel 2, in particular to the cover 5, with a further, not shown, pressure vessel.
  • this hydraulic fluid 15 is supplied under pressure.
  • This causes the separating piston 14 to move to the right in the figure.
  • the separating piston 14 subsequently compresses the gas 16 present at the end face 23 of the separating piston 14.
  • this not only leads to a compression of the gas 16 in the space 24, but also to a compression of the gas 16 in the intermediate space 25, in particular the annular space 27.
  • This has the effect that on the cylinder 6 throughout the same pressure on the inside and outside is present. Accordingly, the cylinder 6 advantageously does not deform under the action of the hydraulic fluid 15.
  • the intermediate space 25 is advantageously ready to receive a comparatively large amount of gas 16.
  • This comparatively large amount of gas has a positive effect on the charging characteristics of the piston accumulator 1.
  • charging characteristic is meant in the present case the course of the pressure in the hydraulic fluid 15 or in the gas 16 as a function of the charge state, ie the degree of filling of the cylinder 6.
  • the intermediate space 25 it is possible to achieve that the pressure change with which the hydraulic fluid 15 is to be charged in order to further compress the gas 16. to rim, is comparatively small.
  • the gas volume which can be accommodated in the intermediate space 25 is at least 1.5 times, preferably at least 2 times, greater than the gas volume which can be received in the space 24.
  • gas post-switching volume The volume of gas received in the intermediate space 25 is referred to herein as a gas post-switching volume.
  • gas afterglow volume is meant in the present case a gas volume which is dimensioned such that it is suitable for substantially influencing the charging characteristic of the piston accumulator 1.

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)

Abstract

The invention relates to a piston accumulator (1) comprising a pressure vessel (2), a cylinder (6) arranged within the pressure vessel (2), an interstice (25) formed between the pressure vessel (2) and the cylinder (6), and a separating piston (14) that can be moved within the cylinder (6). A hydraulic fluid (15) acts on a first side (18) of the separating piston (14), while a gas (16) acts on a second side (23) of the separating piston (14). The gas (16) is fluidically connected to the interstice (25), while the hydraulic fluid (15) is fluidically connected to a connection (22) on the cylinder (6).

Description

Beschreibung  description
Titel title
Kolbenspeicher Stand der Technik  Piston accumulator prior art
Die vorliegende Erfindung betrifft einen Kolbenspeicher. The present invention relates to a piston accumulator.
Kolbenspeicher werden typischerweise dazu verwendet, große Mengen Energie zu speichern. Beispielsweise werden bei Hydraulikhybridfahrzeugen Kolbenspeicher dazu verwendet, Energie, die beispielsweise beim Abbremsen der Räder erzeugt wird, zu speichern und Energie, die beispielsweise beim Beschleunigen des Fahrzeugs benötigt wird, freizusetzen. Ein derartiger Kolbenspeicher ist beispielsweise in der Druckschrift DE 10 2006 060 078 A1 beschrieben. Piston accumulators are typically used to store large amounts of energy. For example, in hydraulic hybrid vehicles, piston accumulators are used to store energy generated, for example, during braking of the wheels, and to release energy required, for example, when accelerating the vehicle. Such a piston accumulator is described for example in the document DE 10 2006 060 078 A1.
Vorteile der Erfindung Advantages of the invention
Der in Anspruch 1 definierte Kolbenspeicher bietet gegenüber herkömmlichen Lösungen den Vorteil, dass der Zylinder unter keiner nennenswerten Spannung steht, da an dem Zylinder innenseitig und außenseitig der gleiche Druck anliegt. Dadurch kann der Zylinder aus einem nicht druckstabilen und dafür leichten Material gebildet werden. Aufgrund des Umstandes, dass sich der Zylinder nicht verformt, wird auch ein dichter Abschluss zwischen dem Zylinder und dem in diesem beweglichen Trennkolben gewährleistet. Ferner führt ein Leck in dem Zylinder nicht zu einem Austreten von Hydraulikflüssigkeit in die Umgebung, da die Hydraulikflüssigkeit von dem Druckbehälter aufgefangen wird. Ferner entweicht bei einem Leck in dem Druckbehälter nur Gas, beispielsweise Stickstoff, was unschädlich für die Umwelt ist. Die in den jeweiligen Unteransprüchen aufgeführten Merkmale beziehen sich auf vorteilhafte Weiterbildungen und Verbesserungen des Gegenstands der Erfindung. The defined in claim 1 piston accumulator offers over conventional solutions has the advantage that the cylinder is under no significant tension, as applied to the inside and outside of the cylinder, the same pressure. As a result, the cylinder can be formed from a non-pressure-stable and therefore lightweight material. Due to the fact that the cylinder does not deform, a tight seal is also ensured between the cylinder and the moving piston in this movable. Further, a leak in the cylinder does not leak hydraulic fluid into the environment because the hydraulic fluid is caught by the pressure vessel. Further, escapes in a leak in the pressure vessel only gas, such as nitrogen, which is harmless to the environment. The features listed in the respective subclaims relate to advantageous developments and improvements of the subject of the invention.
Zeichnungen drawings
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Die einzige Figur der Zeichnung zeigt in einem Längsschnitt einen Kolbenspeicher 1 gemäß einem bevorzugten Ausführungsbeispiel der vorliegenden Erfindung. The sole figure of the drawing shows in a longitudinal section a piston accumulator 1 according to a preferred embodiment of the present invention.
Der Kolbenspeicher 1 weist einen Druckbehälter 2 auf. Der Druckbehälter 2 kann sich aus einem Grundkörper 3 mit einem im Wesentlichen ringförmigen Querschnitt und Deckeln 4, 5 zusammensetzen, welche den Grundkörper 3 an seinen gegenüberliegenden Enden verschließen. Innerhalb des Druckbehälters 2 ist ein Zylinder 6 angeordnet. The piston accumulator 1 has a pressure vessel 2. The pressure vessel 2 may be composed of a base body 3 with a substantially annular cross-section and lids 4, 5, which close the base body 3 at its opposite ends. Within the pressure vessel 2, a cylinder 6 is arranged.
Der Zylinder 6 erstreckt sich vorzugsweise entlang der Längsachse 7 des Druckbehälters 2. Der Zylinder 6 kann sich aus einem Grundkörper 1 1 mit einem im Wesentlichen ringförmigen Querschnitt und einem den Grundkörper 1 1 an seinem einen Ende 12 verschließenden Deckel 13 zusammensetzen. In dem Zylinder 6 ist ein Trennkolben 14 beweglich vorgesehen. Der Trennkolben 14 ist, wie durch den Doppelpfeil in der Figur angedeutet, entlang der Längsachse 7 beweglich. The cylinder 6 preferably extends along the longitudinal axis 7 of the pressure vessel 2. The cylinder 6 may consist of a base body 1 1 having a substantially annular cross-section and the base body 1 1 at its one end 12 closing lid 13 composed. In the cylinder 6, a separating piston 14 is provided movably. The separating piston 14 is, as indicated by the double arrow in the figure, along the longitudinal axis 7 movable.
Der Trennkolben 14 trennt eine Hydraulikflüssigkeit 15 von einem Gas 16. Die Hydraulikflüssigkeit 15 befindet sich in einem Raum 17, welcher von dem Grundkörper 1 1 , dem Deckel 13 und einer Stirnseite 18 des Trennkolbens 14 begrenzt wird. Die Hydraulikflüssigkeit 15 ist mittels eines Anschlusses 22 dem Raum 17 zuführbar bzw. von diesem abführbar. Dadurch ist es möglich, den Kolbenspeicher 1 mit Hydraulikflüssigkeit 15 zu beaufschlagen, um so beispielsweise Energie in diesem zu speichern. Ferner ist es möglich, Hydraulikflüssigkeit 15 aus dem Kolbenspeicher 1 abzuführen, um somit einen Verbraucher mit Energie zu versorgen. Das Gas 16 befindet sich in einem Raum 24, welcher von einer der Stirnseite 18 gegenüberliegenden Stirnseite 23 des Trennkolbens 14 und dem Grundkörper 1 1 begrenzt wird. Der Raum 24 ist mit einem Zwischenraum 25 mittels einer Öffnung 26 verbunden, so dass das Gas 16 zwischen dem Raum 24 und dem Zwi- schenraum 25 fließen kann. Der Zwischenraum 25 wird zwischen dem Zylinder 6 und dem Druckbehälter 2 gebildet. Der Zwischenraum 25 kann insbesondere einen Ringraum 27 umfassen, welcher den Zylinder 6 entlang der Längsachse 7 umgibt. Der Zwischenraum 25 kann ferner Räume 31 und 32 im Bereich der Deckel 4 bzw. 5 umfassen. The separating piston 14 separates a hydraulic fluid 15 from a gas 16. The hydraulic fluid 15 is located in a space 17 which is delimited by the main body 1 1, the cover 13 and an end face 18 of the separating piston 14. The hydraulic fluid 15 can be supplied to the space 17 by means of a connection 22 or can be discharged therefrom. This makes it possible to pressurize the piston accumulator 1 with hydraulic fluid 15, for example, to store energy in this. Furthermore, it is possible to discharge hydraulic fluid 15 from the piston accumulator 1 in order thus to supply a load with energy. The gas 16 is located in a space 24 which is bounded by an end face 18 opposite the end face 23 of the separating piston 14 and the base body 1 1. The space 24 is connected to a gap 25 by means of an opening 26, so that the gas 16 can flow between the space 24 and the intermediate space 25. The gap 25 is formed between the cylinder 6 and the pressure vessel 2. The intermediate space 25 may in particular comprise an annular space 27 which surrounds the cylinder 6 along the longitudinal axis 7. The intermediate space 25 may further include spaces 31 and 32 in the region of the covers 4 and 5, respectively.
Der Zwischenraum 25 kann weiterhin mittels eines Anschlusses 33 an dem Druckbehälter 2, insbesondere an dem Deckel 5, mit einem weiteren, nicht dargestellten Druckbehälter verbunden sein. Nach dieser im Wesentlichen konstruktiven Beschreibung des Kolbenspeichers 1 folgt nun eine Darstellung von dessen Funktionsweise. The intermediate space 25 can also be connected by means of a connection 33 to the pressure vessel 2, in particular to the cover 5, with a further, not shown, pressure vessel. After this essentially constructive description of the piston accumulator 1 is now a representation of its operation.
Soll beispielsweise Energie in dem Kolbenspeicher 1 gespeichert werden, so wird diesem Hydraulikflüssigkeit 15 unter Druck zugeführt. Dies führt dazu, dass sich der Trennkolben 14 in der Figur nach rechts bewegt. Der Trennkolben 14 komprimiert in der Folge das an der Stirnseite 23 des Trennkolbens 14 anstehende Gas 16. Dies führt aber nicht nur zu einer Komprimierung des Gases 16 in dem Raum 24, sondern auch zu einer Komprimierung des Gases 16 in dem Zwischenraum 25, insbesondere in dem Ringraum 27. Dies wiederum hat den Ef- fekt, dass an dem Zylinder 6 durchwegs der gleiche Druck innenseitig und außenseitig ansteht. Demnach verformt sich der Zylinder 6 vorteilhaft nicht unter der Einwirkung der Hydraulikflüssigkeit 15. If, for example, energy is to be stored in the piston accumulator 1, this hydraulic fluid 15 is supplied under pressure. This causes the separating piston 14 to move to the right in the figure. The separating piston 14 subsequently compresses the gas 16 present at the end face 23 of the separating piston 14. However, this not only leads to a compression of the gas 16 in the space 24, but also to a compression of the gas 16 in the intermediate space 25, in particular the annular space 27. This in turn has the effect that on the cylinder 6 throughout the same pressure on the inside and outside is present. Accordingly, the cylinder 6 advantageously does not deform under the action of the hydraulic fluid 15.
Vorteilhaft steht vorliegend neben dem Raum 24 der Zwischenraum 25 zur Auf- nähme einer vergleichsweise großen Gasmenge 16 bereit. Diese vergleichsweise große Gasmenge wirkt sich positiv auf die Ladecharakteristik des Kolbenspeichers 1 aus. Mit "Ladecharakteristik" ist vorliegend der Verlauf des Drucks in der Hydraulikflüssigkeit 15 oder in dem Gas 16 in Abhängigkeit von dem Ladezustand, d. h. von dem Grad der Befüllung des Zylinders 6, gemeint. Mittels des Zwischenraums 25 kann erreicht werden, dass die Druckänderung, mit welcher die Hydraulikflüssigkeit 15 zu beaufschlagen ist, um das Gas 16 weiter zu komp- rimieren, vergleichsweise gering ist. Für eine günstige Ladecharakteristik des Kolbenspeichers 1 ist das in dem Zwischenraum 25 aufnehmbare Gasvolumen wenigstens 1 ,5 mal, vorzugsweise wenigstens 2 mal größer als das in dem Raum 24 aufnehmbare Gasvolumen. In the present case, in addition to the space 24, the intermediate space 25 is advantageously ready to receive a comparatively large amount of gas 16. This comparatively large amount of gas has a positive effect on the charging characteristics of the piston accumulator 1. By "charging characteristic" is meant in the present case the course of the pressure in the hydraulic fluid 15 or in the gas 16 as a function of the charge state, ie the degree of filling of the cylinder 6. By means of the intermediate space 25, it is possible to achieve that the pressure change with which the hydraulic fluid 15 is to be charged in order to further compress the gas 16. to rim, is comparatively small. For a favorable charging characteristic of the piston accumulator 1, the gas volume which can be accommodated in the intermediate space 25 is at least 1.5 times, preferably at least 2 times, greater than the gas volume which can be received in the space 24.
Das in dem Zwischenraum 25 aufgenommene Gasvolumen wird vorliegend als Gasnachschaltevolumen bezeichnet. Mit "Gasnachschaltevolumen" ist vorliegend ein Gasvolumen gemeint, welches derart dimensioniert ist, dass es dazu geeignet ist, die Ladecharakteristik des Kolbenspeichers 1 wesentlich zu beeinflussen. The volume of gas received in the intermediate space 25 is referred to herein as a gas post-switching volume. By "gas afterglow volume" is meant in the present case a gas volume which is dimensioned such that it is suitable for substantially influencing the charging characteristic of the piston accumulator 1.
Mittels des nicht dargestellten Druckbehälters, welcher mittels des Anschlusses 33 mit dem Zwischenraum 25 verbunden ist, lässt sich das Gasnachschaltevolumen noch weiter vergrößern. By means of the pressure vessel, not shown, which is connected by means of the terminal 33 with the gap 25, the gas switching volume can be further increased.
Obwohl die Erfindung anhand von Ausführungsbeispielen vorliegend konkret beschrieben wurde, ist sie darauf nicht beschränkt, sondern auf vielfältige Art und Weise modifizierbar. Although the invention has been described concretely by way of embodiments herein, it is not limited thereto, but modifiable in a variety of ways.

Claims

Ansprüche claims
1 . Kolbenspeicher (1 ), aufweisend: einen Druckbehälter (2); einen Zylinder (6), welcher innerhalb des Druckbehälters (2) angeordnet ist; einen zwischen dem Druckbehälter (2) und dem Zylinder (6) gebildeten Zwischenraum (25); und einen Trennkolben (14), welcher in dem Zylinder (6) beweglich vorgesehen ist; wobei auf eine erste Seite (18) des Trennkolbens (14) eine Hydraulikflüssigkeit (15) und auf eine zweite Seite (23) des Trennkolbens (14) ein Gas (16) wirkt; und wobei das Gas (16) in fluidischer Verbindung mit dem Zwischenraum (25) und die Hydraulikflüssigkeit (15) in fluidischer Verbindung mit einem An- schluss (22) an dem Zylinder (6) stehen. 1 . Piston accumulator (1), comprising: a pressure vessel (2); a cylinder (6) disposed within the pressure vessel (2); a gap (25) formed between the pressure vessel (2) and the cylinder (6); and a separating piston (14) provided movably in the cylinder (6); wherein a hydraulic fluid (15) acts on a first side (18) of the separating piston (14) and a gas (16) acts on a second side (23) of the separating piston (14); and wherein the gas (16) is in fluid communication with the gap (25) and the hydraulic fluid (15) in fluid communication with a port (22) on the cylinder (6).
Kolbenspeicher nach Anspruch 1 , wobei der Zwischenraum (25) ein Gas- nachschaltevolumen aufweist. Piston accumulator according to claim 1, wherein the intermediate space (25) has a gas Nachschaltevolumen.
Kolbenspeicher nach Anspruch 2, wobei das Gasnachschaltevolumen (25) wenigstens 1 ,5 mal, vorzugsweise wenigstens 2 mal, größer ausgebildet ist, als ein maximales Gasvolumen (16) in dem Zylinder (6). Piston accumulator according to claim 2, wherein the Gasnachschaltevolumen (25) at least 1, 5 times, preferably at least 2 times, greater than a maximum gas volume (16) in the cylinder (6).
Kolbenspeicher nach Anspruch 1 , 2 oder 3, wobei der Zwischenraum (25) einen Ringraum (27) umfasst. Piston accumulator according to claim 1, 2 or 3, wherein the intermediate space (25) comprises an annular space (27).
EP10800950.7A 2010-01-26 2010-12-29 Piston type accumulator Not-in-force EP2529121B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010001200 DE102010001200A1 (en) 2010-01-26 2010-01-26 Kobe memory
PCT/EP2010/070866 WO2011091936A1 (en) 2010-01-26 2010-12-29 Piston accumulator

Publications (2)

Publication Number Publication Date
EP2529121A1 true EP2529121A1 (en) 2012-12-05
EP2529121B1 EP2529121B1 (en) 2016-12-21

Family

ID=43806741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10800950.7A Not-in-force EP2529121B1 (en) 2010-01-26 2010-12-29 Piston type accumulator

Country Status (5)

Country Link
US (1) US8899270B2 (en)
EP (1) EP2529121B1 (en)
CN (1) CN102713311B (en)
DE (1) DE102010001200A1 (en)
WO (1) WO2011091936A1 (en)

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DE102011090048A1 (en) 2011-12-28 2013-07-04 Robert Bosch Gmbh Method for determining a position of a piston in a piston accumulator by resistance measurement and suitably designed piston accumulator
DE102012218515A1 (en) 2012-10-11 2014-04-17 Robert Bosch Gmbh Method for determination of current storage filling level of piston pressure accumulator, involves measuring value of current pressure inside piston pressure accumulator
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Also Published As

Publication number Publication date
US8899270B2 (en) 2014-12-02
DE102010001200A1 (en) 2011-07-28
US20130048126A1 (en) 2013-02-28
CN102713311A (en) 2012-10-03
EP2529121B1 (en) 2016-12-21
CN102713311B (en) 2015-09-30
WO2011091936A1 (en) 2011-08-04

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