WO2007101696A1 - Reservoir de fluide - Google Patents

Reservoir de fluide Download PDF

Info

Publication number
WO2007101696A1
WO2007101696A1 PCT/EP2007/002032 EP2007002032W WO2007101696A1 WO 2007101696 A1 WO2007101696 A1 WO 2007101696A1 EP 2007002032 W EP2007002032 W EP 2007002032W WO 2007101696 A1 WO2007101696 A1 WO 2007101696A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
reservoir
shut
actuator
fluid reservoir
Prior art date
Application number
PCT/EP2007/002032
Other languages
German (de)
English (en)
Inventor
Dirk Kesselgruber
Original Assignee
Trw Automotive 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 Trw Automotive Gmbh filed Critical Trw Automotive Gmbh
Publication of WO2007101696A1 publication Critical patent/WO2007101696A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/0408—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics details, e.g. antifreeze for suspension fluid, pumps, retarding means per se
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/056—Regulating distributors or valves for hydropneumatic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/413—Hydraulic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/44—Centering or positioning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/02—Supply or exhaust flow rates; Pump operation
    • B60G2500/022—Minimisation of pressure cavitation effects upon demand

Definitions

  • the invention relates to a fluid reservoir, in particular for hydraulic actuators of suspension stabilization systems.
  • Fluid accumulators are known from the prior art and are used in particular in hydraulic circuits for the rapid provision of missing hydraulic fluid or for rapid absorption of excess hydraulic fluid.
  • external activation of an actuator poses a risk of cavitation in a pressure chamber of the actuator.
  • External control in this context means that the actuator does not perform a movement due to an increase or decrease of hydraulic fluid (pressure control), but that hydraulic fluid must be added or removed by an imposed movement.
  • Forced movements for a hydraulic actuator arise when used in a chassis stabilization system, e.g. by road bumps such as potholes, etc., which are followed by the wheel associated with the actuator.
  • DE 101 11 551 A describes a piston-cylinder unit for
  • Chassis stabilization which acts as a damper and hydraulic actuator.
  • DE 101 11 551 A proposes, in general, to connect each actuator working chamber to a so-called minimum pressure supply source, from which hydraulic fluid can be sucked.
  • the object of the invention is therefore to solve the Kavitationsproblem concretely and with little technical effort.
  • a fluid accumulator is provided, in particular for hydraulic actuators of chassis stabilization systems, with a housing which encloses a storage space, and a shut-off element which encloses the storage space - -
  • each fluid chamber has a fluid port and the shut-off between two end positions in the reservoir is movable.
  • the shut-off element can each close a fluid connection at its end positions. In order for the fluid reservoir after the provision of the fluid volume of its fluid chamber prevents further fluid flow and no longer exerts any influence on the hydraulic circuit.
  • a positioning means which acts on the shut-off element in a rest position centrally in the storage space.
  • the positioning means extends through at least one fluid chamber.
  • the position means is supported on the one hand to an axial end of the fluid chamber and the other on the shut-off.
  • the positioning means may be at least one spring. This is particularly advantageous because springs are very inexpensive and durable positioning means.
  • the fluid reservoir is connected in parallel with a hydraulic actuator.
  • FIG. 1 is a section through a fluid reservoir according to the invention
  • FIG. 2 shows a shut-off element of the fluid reservoir from FIG. 1 in detail
  • FIG. 3 is a schematic representation of the fluid reservoir according to the invention, connected in parallel with a hydraulic actuator, in a rest position;
  • Figure 4 is a schematic representation of the fluid storage device according to the invention, connected in parallel with a hydraulic actuator, in a
  • FIG. 5 is a schematic representation of the fluid reservoir according to the invention, connected in parallel with a hydraulic actuator, in a third-party drive.
  • FIG. 1 shows a fluid reservoir according to the invention, in particular for hydraulic actuators of suspension stabilization systems, with a housing 10 which encloses a reservoir 12, a shut-off element 14 which fluid-tightly divides the reservoir 12 into two fluid chambers 16, 18 with variable volume, each fluid chamber 16, 18 has a fluid connection 20, 22 and the shut-off element 14 is movable between two end positions in the storage space.
  • the housing 10 includes a cylindrical side wall 24 and an upper cap 26 and a lower cap 28.
  • the caps 26, 28 are fixed and fluid-tightly connected to the side wall 24.
  • the cover caps 26, 28 each have a central fluid connection 20, 22.
  • the shut-off element 14 is acted upon by a positioning means in a rest position centrally in the storage space 12.
  • the positioning means comprises in Figure 1, two springs 30, each extending through a fluid chamber 16, 18 extend.
  • one end of the springs 30 bears against the shut-off element 14, the other end surrounds the fluid connection 20 or 22 and engages on a recess 32 or 34 of the cover caps 26, 28.
  • the recesses 32, 34 of the caps 26, 28 are each facing the storage space 12 and formed so that they can each receive one of the springs 30 in their compressed state. Consequently, it is possible that in each case an axial end of the shut-off element 14 acts on the edge of the cover caps 26 and 28 and thus an upper and lower end position of the shut-off element 14 is defined.
  • FIG. 2 shows the shut-off element 14 in detail, with an upper axial seal 36, a lower axial seal 37 and a radial seal 38.
  • the radial seal 38 is formed so as to engage the side wall 24 of the Housing 10 slidably abuts. This creates a largely fluid-tight connection with the usual lubrication and leakage losses.
  • the shut-off 14 moves depending on a spring hardness and a possible bias of the springs 30 between the upper and lower end position. In particular, in these end positions, the pressure differences at the fluid connections can be very large. Therefore, the radial seal 38 is supported in the end positions by the axial seal 36 and 37, respectively.
  • the axial seal 36, 37 of the shutoff 14 is pressed by the pressure difference on the edge region of the caps 26, 28 and prevents fluid flow through the fluid reservoir 8 (see in particular Figures 4 and 5).
  • the shut-off element 14 thus closes at its end positions in each case a fluid connection 20, 22nd
  • FIG. 3 shows an actuator 40 in piston-cylinder construction.
  • a piston 42 divides a cylinder 44 into two pressure chambers 46, 48.
  • the fluid reservoir 8 is connected in parallel with the hydraulic actuator. This means that in each case a fluid chamber 16, 18 communicates with a pressure chamber 46, 48 via an upper fluid line 50 and a lower fluid line 52, respectively.
  • Figure 3 shows this parallel circuit in the event that either no pressure, or equal pressure applied to the pressure chambers.
  • the piston 42 and the shut-off element 14 are located in a central rest position in the cylinder 44 or in the storage space 12.
  • the fluid reservoir 8 in FIGS. 3-5 is markedly enlarged in relation to the actuator 40.
  • the fluid reservoir 8 in FIGS. 3-5 is markedly enlarged in relation to the actuator 40.
  • small volume is needed for the prevention of cavitation only one, in relation to the volume of the pressure chambers 46, 48.
  • FIG. 4 shows the parallel connection of the actuator 40 with the fluid reservoir 8 from FIG. 3 during a pressure control.
  • the pressure in the upper fluid line 50 has been increased. This happens, for example, when a coupled to the piston 42 vehicle wheel is to be moved relative to the coupled with the cylinder 44 vehicle body down.
  • the fluid lines are for this purpose coupled to a pressure source, for example a pump (not shown).
  • the high pressure is not only on the Pressure chamber 46 of the actuator 40, but also to the upper fluid chamber 16 of the fluid reservoir 8 at.
  • the shut-off element 14 moves to the lower end position, wherein the fluid of the lower fluid chamber 18 is pushed out of the chamber until the lower axial seal 37 abuts the edge of the lower cap 28 and shuts off a further fluid flow. Due to the small volume of fluid in the fluid chambers 16, 18 in relation to the pressure chambers 46, 48, the response and reaction time of the actuator is at most negligibly increased by the parallel connection of the fluid reservoir.
  • FIG. 5 shows the parallel circuit from FIGS. 3 and 4 in the case of external activation.
  • the piston 42 from a forced movement relative to the cylinder down.
  • This increases the pressure in the lower pressure chamber 48 and reduces the pressure in the upper pressure chamber 46 of the actuator 40 abruptly.
  • the pressure drop in the upper pressure chamber is likely to cause cavitation.
  • the fluid reservoir 8 is connected in parallel with the actuator 40, a higher pressure is present at the lower fluid port 22 than at the upper fluid port 20.
  • the result is a suction at the upper fluid port 20 and at the same time an overpressure at the lower fluid port 22.
  • the shut-off element 14 moves upward and the upper pressure chamber 46 of the actuator 40 to the fluid located in the upper fluid chamber 16 to. Due to the spatial proximity of the fluid chambers 16, 18 and the pressure chambers 46, 48, this happens very quickly, whereby an occurrence of cavitation in the actuator 40 is prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

L'invention concerne un réservoir de fluide (8), notamment pour des actionneurs hydrauliques (40) de systèmes de stabilisation de châssis, qui comprend un boîtier qui entoure une chambre de stockage, et un élément de blocage (14) qui divise la chambre de stockage de manière étanche aux fluides en deux chambres fluidiques (16, 18) de volume variable, chaque chambre fluidique (16, 18) présentant un raccord fluidique et l'élément de blocage (14) pouvant être déplacé entre deux positions extrêmes dans la chambre de stockage.
PCT/EP2007/002032 2006-03-08 2007-03-08 Reservoir de fluide WO2007101696A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006010738.1 2006-03-08
DE200610010738 DE102006010738A1 (de) 2006-03-08 2006-03-08 Fluidspeicher

Publications (1)

Publication Number Publication Date
WO2007101696A1 true WO2007101696A1 (fr) 2007-09-13

Family

ID=38162270

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/002032 WO2007101696A1 (fr) 2006-03-08 2007-03-08 Reservoir de fluide

Country Status (2)

Country Link
DE (1) DE102006010738A1 (fr)
WO (1) WO2007101696A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021097341A1 (fr) 2019-11-13 2021-05-20 ClearMotion, Inc. Tampon hydraulique différentiel
WO2022047373A1 (fr) * 2020-08-31 2022-03-03 ClearMotion, Inc. Tampon pour un dispositif de pompage hydraulique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015211525A1 (de) * 2015-06-23 2016-12-29 Schaeffler Technologies AG & Co. KG Druckschwankungsunempfindliches Hydraulik-Reservoir
DE102022129375A1 (de) 2022-11-07 2024-05-08 Thyssenkrupp Ag Schwingungsdämpfer, Fahrradgabel, Federbein sowie Verwendung eines Schwingungsdämpfers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738455A1 (de) * 1977-08-26 1979-03-01 Daimler Benz Ag Aktive schwingungsdaempfer
EP0346186A1 (fr) * 1988-06-08 1989-12-13 Automobiles Peugeot Dispositif de suspension hydropneumatique perfectionné et véhicule équipé de ce dispositif
JPH02136319A (ja) * 1988-11-18 1990-05-24 Mazda Motor Corp 車両のサスペンション装置
US5024302A (en) * 1985-04-12 1991-06-18 Robert Bosch Gmbh Apparatus for damping courses of motion
EP1152166A1 (fr) * 2000-05-04 2001-11-07 Krupp Bilstein GmbH Amortisseur de chocs avec amortissement dépendant de l'amplitude
DE10111551A1 (de) 2001-03-10 2002-09-12 Bayerische Motoren Werke Ag Aktives Fahrwerksystem eines Fahrzeugs
DE10351353A1 (de) * 2003-07-08 2005-02-10 Thyssenkrupp Bilstein Gmbh Schwingungsdämpfer mit amplitudenabhängiger Dämpfung
EP1533541A1 (fr) * 2003-11-20 2005-05-25 Zf Friedrichshafen Ag Amortisseur de vibrations avec amortissement dépendant de l'amplitude
EP1544498A1 (fr) * 2003-12-20 2005-06-22 DaimlerChrysler AG Dispositif amortisseur pour un véhicule

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US2592613A (en) * 1947-06-07 1952-04-15 Snyder Oil Tool Corp Self-compensating accumulator
JPS6093517U (ja) * 1983-12-01 1985-06-26 株式会社クボタ 移動農機の走行装置
DE4237494A1 (de) * 1992-11-06 1994-05-11 Stabilus Gmbh Gasfeder
DE19633644A1 (de) * 1996-08-21 1998-03-05 Behrens Ag I K C Dämpfungseinrichtung für das hydraulische Antriebssystem einer Stanzmaschine
DE19822092A1 (de) * 1998-05-16 1999-11-18 Zf Luftfahrttechnik Gmbh Druckmittelspeicher
DE10244705B3 (de) * 2002-09-24 2004-01-08 Gesellschaft für technische Entwicklungen mbH Vorrichtung zum Reduzieren und Vergleichmäßigen des Drucks eines viskosen Mediums

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738455A1 (de) * 1977-08-26 1979-03-01 Daimler Benz Ag Aktive schwingungsdaempfer
US5024302A (en) * 1985-04-12 1991-06-18 Robert Bosch Gmbh Apparatus for damping courses of motion
EP0346186A1 (fr) * 1988-06-08 1989-12-13 Automobiles Peugeot Dispositif de suspension hydropneumatique perfectionné et véhicule équipé de ce dispositif
JPH02136319A (ja) * 1988-11-18 1990-05-24 Mazda Motor Corp 車両のサスペンション装置
EP1152166A1 (fr) * 2000-05-04 2001-11-07 Krupp Bilstein GmbH Amortisseur de chocs avec amortissement dépendant de l'amplitude
DE10111551A1 (de) 2001-03-10 2002-09-12 Bayerische Motoren Werke Ag Aktives Fahrwerksystem eines Fahrzeugs
DE10351353A1 (de) * 2003-07-08 2005-02-10 Thyssenkrupp Bilstein Gmbh Schwingungsdämpfer mit amplitudenabhängiger Dämpfung
EP1533541A1 (fr) * 2003-11-20 2005-05-25 Zf Friedrichshafen Ag Amortisseur de vibrations avec amortissement dépendant de l'amplitude
EP1544498A1 (fr) * 2003-12-20 2005-06-22 DaimlerChrysler AG Dispositif amortisseur pour un véhicule

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021097341A1 (fr) 2019-11-13 2021-05-20 ClearMotion, Inc. Tampon hydraulique différentiel
EP4058309A4 (fr) * 2019-11-13 2023-08-16 Clearmotion, Inc. Tampon hydraulique différentiel
WO2022047373A1 (fr) * 2020-08-31 2022-03-03 ClearMotion, Inc. Tampon pour un dispositif de pompage hydraulique

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Publication number Publication date
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