WO2015082707A1 - Shut-off valve of a hydraulic accumulator, assembly provided with such a valve, corresponding installation method - Google Patents

Shut-off valve of a hydraulic accumulator, assembly provided with such a valve, corresponding installation method Download PDF

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Publication number
WO2015082707A1
WO2015082707A1 PCT/EP2014/076779 EP2014076779W WO2015082707A1 WO 2015082707 A1 WO2015082707 A1 WO 2015082707A1 EP 2014076779 W EP2014076779 W EP 2014076779W WO 2015082707 A1 WO2015082707 A1 WO 2015082707A1
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WO
WIPO (PCT)
Prior art keywords
valve
control member
hydraulic accumulator
hollow body
stable position
Prior art date
Application number
PCT/EP2014/076779
Other languages
French (fr)
Inventor
Edouard NAULIN
Samir DAHMANY
Quentin Weymuller
Original Assignee
Faurecia Systemes D'echappement
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 Faurecia Systemes D'echappement filed Critical Faurecia Systemes D'echappement
Priority to DE112014005533.6T priority Critical patent/DE112014005533T5/en
Publication of WO2015082707A1 publication Critical patent/WO2015082707A1/en

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Classifications

    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve

Definitions

  • Isolating valve of a hydraulic accumulator together with such a valve, corresponding mounting method
  • the present invention generally relates to hydraulic accumulators.
  • the invention relates, in a first aspect, to an isolation valve of a hydraulic accumulator, of the type comprising:
  • a hollow body comprising a passage duct for a fluid having an inlet and an outlet, the inlet being designed to be connected to an orifice of the hydraulic accumulator;
  • An anti-extrusion valve movable relative to the hollow body between a closed position of the inlet and a release position of the inlet;
  • an isolating member for example a plug valve, at the outlet of the passage duct, in addition to the anti-extrusion valve.
  • accumulators are used on vehicles as energy storage devices. They generally comprise two chambers, one containing a liquid such as an oil, and the other gas.
  • the ball valve placed at the outlet of the chamber containing the oil, makes it possible to allow or prevent the circulation of oil between the accumulator and the rest of the vehicle.
  • the accumulator is filled with oil in the workshop and then mounted in the vehicle.
  • the ball valve is opened during filling and then closed to isolate the chamber containing the oil during the connection of the passage conduit to the vehicle oil circuit.
  • the closure of the ball valve makes it possible in particular to transport the pre-filled accumulator in oil and to draw the passage duct empty for initial filling with oil, once this passage connected to the circuit of the vehicle.
  • the ball valve is then opened again to allow the operation of the accumulator. It then remains normally open continuously, for example until the battery is removed.
  • the invention aims to simplify the connection between the battery and the vehicle and make it less bulky.
  • the invention relates to an isolation valve of a hydraulic accumulator of the aforementioned type, characterized in that said valve comprises a control member connected to the anti-extrusion valve, movable selectively with respect to the hollow body between a first stable position in which the control member blocks the valve in the closed position, and a second stable position in which the valve is free to debate between its closed position and its disengaged position.
  • the anti-extrusion valve acts as an isolation device. This simplifies the connection between the battery and the vehicle and make it less bulky.
  • control member has a cam surface arranged so that, when the control member is placed at an intermediate position between its first and second stable positions, the elastic member moves the control member to the second stable position.
  • the elastic member moves the control member to the first stable position.
  • the valve is always either in its disengaged position or in its closed position.
  • the energy is stored in the accumulator by transferring oil into the chamber of the accumulator, the oil compressing the gas in the other chamber. This energy can then be restored, especially during a start or for a sudden acceleration when more power is needed.
  • the oil must be able to circulate between the accumulator and the vehicle circuit with a minimum of pressure drop.
  • the accumulator When the accumulator is fitted with a state-of-the-art anti-extrusion valve coupled with a plug valve, the operator who installs the accumulator on the vehicle may not fully reopen the ball valve. . This has the effect of creating a significant pressure drop and significantly reduce the performance of the energy recovery system.
  • the valve may further include one or more of the following features, considered individually or in any technically feasible combination: -
  • the valve comprises a shutter and a rod connected to the shutter and cooperating with the control member;
  • the cam surface comprises first and second sections substantially perpendicular to each other, connected by a bend having a small radius of curvature;
  • the control member is a rotary plug engaged in the hollow body, having an axis of rotation substantially perpendicular to a direction of movement of the valve between its closed positions and release;
  • the plug is hollow, the cam surface being formed on a radially inner surface of the plug, the valve having a cam follower cooperating with the cam surface;
  • the control member is a lever sliding against the hollow body through the cam surface
  • a stem of the valve comprises at least one oblong hole elongated parallel to the rod, the lever comprising at least one axis engaged in the oblong hole;
  • the invention relates to an assembly comprising a hydraulic accumulator and an isolation valve of said hydraulic accumulator, having the above characteristics, the hydraulic accumulator comprising a rigid enclosure and an expandable envelope housed in the enclosure rigid, the valve in the disengaged position protruding inside the rigid enclosure through the orifice to prevent the expansive envelope from entering the inlet.
  • the invention relates to a method of mounting on board a vehicle of a hydraulic accumulator equipped with an isolation valve having the above characteristics, the method comprising the following steps:
  • the hydraulic accumulator is filled with fluid in a filling workshop. He boarded the vehicle in a terminal manufacturing plant, away from the manufacturing facility. It is transported from the filling plant to the terminal plant with the control unit in first position.
  • FIG. 1 is a sectional view of the assembly comprising an accumulator and an isolation valve according to a first embodiment of the valve;
  • FIG. 2 is an exploded perspective view of the valve according to the first embodiment
  • FIGS. 3 and 4 are, respectively, sectional views of the valve according to the first embodiment, when the valve is in the open position and when the valve is in the closed position;
  • FIG. 5 and 6 are, respectively, sectional views of the valve according to a second embodiment, when the valve is in the open position and when the valve is in the closed position.
  • valve 1 is mounted on a hydraulic accumulator 3, itself intended to be embedded in a vehicle.
  • This vehicle is for example a motor vehicle, such as a car, a truck, an all-terrain vehicle etc.
  • It is for example integrated in a circuit for recovering the deceleration energy of the vehicle.
  • the hydraulic accumulator 3 comprises a rigid enclosure 5 and an expandable envelope 7 housed in the rigid enclosure 5.
  • the enclosure 5 internally delimits an internal volume divided into two chambers 9, 1 1 by the expandable envelope 7.
  • the first chamber 9 is filled with a fluid, which is here an oil.
  • the second chamber 1 1 is filled with an inert gas, having thermodynamic characteristics compatible with the operation of the accumulator. This gas is here nitrogen, but could also be helium.
  • the isolation valve 1 comprises:
  • a hollow body 15 having a passage conduit 17 having an inlet 19 and an outlet 21, the inlet 19 being provided to be connected to an orifice 23 of the hydraulic accumulator; - An anti-extrusion valve 25 movable relative to the hollow body 15 between a closed position of the inlet 19 and a release position of the inlet 19;
  • the hollow body 15 is for example a solid piece, plastic or metal. It is for example obtained by plastic injection or by machining a metal part.
  • an evacuation valve 31 is connected in shunt to the passage duct 17, so as to allow the duct 17 to be drawn to a vacuum.
  • the valve 31 is rigidly fixed in a recess 33 of the hollow body 15. It communicates on one side with the passage 17. On the other side, it has a coupling that can be coupled with a vacuum pump for example.
  • the valve 1 further comprises a counter-flange 35, for fixing the hollow body 15 to the rigid enclosure 5 of the hydraulic accumulator.
  • the peripheral edge of the orifice 23 is clamped sealingly between the hollow body 15 and the counter-flange 35.
  • the counter-flange 35 is placed inside the first chamber 9.
  • the hollow body 15 has a central recess 36 in which the control member 29 is engaged, and outlet and inlet ducts 37, 38 respectively connecting the central recess 36 one at the exit 21 and the other at the entrance 19.
  • the valve 25 comprises a shutter 39 and a rod 41.
  • the shutter 39 has the general shape of a disc, the rod 41 extending from the center of one of the two large faces of the disc.
  • the shutter 39 is engaged in the first chamber 9 of the hydraulic accumulator, the rod 41 passing successively through the flange 35 and the inlet duct 38, and opening into the central recess 36 of the hollow body.
  • the valve 25 moves between its closed position and its release position in a translation movement in a direction Y, shown in particular in Figures 3 and 4.
  • the counter-flange 35 has first and second large faces 43, 45 opposite to each other, one facing the inside of the first chamber 9 and the other turned towards the hollow body 15. It is traversed by a central orifice 47 in which is engaged the rod 41 of the valve.
  • the central orifice 47 slidably guides the rod 41.
  • the counter flange 35 also has a plurality of peripheral orifices 49 for the passage of the oil.
  • the orifices 47 and 49 completely cross the counter flange.
  • the orifices 49 are distributed on a circle around the central orifice 47.
  • the first large face 43 is shaped to create a sealing seat 51, which surrounds the orifices 49.
  • the shutter 39 bears against the sealing seat 51, shutting both the orifices 49 and the orifice 47.
  • the second large face 45 of the flange carries a central boss 53, through which the orifices 47 and 49 pass.
  • the boss 53 is engaged in the inlet 19 of the duct 17, with the interposition of a seal 55.
  • the spring 27 is a spiral compression spring interposed between the counter-flange 35 and the shutter 39.
  • the control member 29 is a plug of generally cylindrical shape.
  • the control member 29 comprises a drive section 57 engaged in the recess 36 of the hollow body and cooperating with the rod 41, and an actuating section 59 projecting from the hollow body.
  • the control member 29 carries out the drive of the valve 25 by moving in a rotary movement about an axis X substantially perpendicular to the direction Y.
  • the X axis is visible in particular in Figure 2.
  • the recess 36 forms a guide bearing in rotation of the control member 29. It has a generally cylindrical shape and has a diameter slightly greater than that of the section 57.
  • the section 57 is partially hollow, and defines internally a cam surface which cooperates with the valve stem 41 to move it between its driving and disengaging positions. More specifically, the section 57 internally comprises a hollow volume 60 delimited by an inner wall 61 on which is formed the cam surface 62. The section 57 has a circumferential slot 65, opening into the internal volume 60, in which the rod is engaged. 41. The end 67 of the rod 41, opposite the shutter 39, is engaged inside the internal volume 60, and forms a cam follower cooperating with the cam surface 62 for driving the valve 25.
  • the cam surface 62 has first and second sections 69 and 71 substantially perpendicular to each other, connected to one another by a bend 73 having a small radius of curvature.
  • the first stable position of the control member 29 is shown in FIG. 4. In this position, the cam follower 67 cooperates with the section 71 of the cam surface. This section is substantially perpendicular to the direction Y.
  • the section 71 has a slight slope from the elbow 73 to an end 75 of the section 71 opposite the elbow 73. At the end 75, the inner wall 61 of the command makes a bend at substantially 90 °. In the first stable position, the cam follower 67 is wedged at the end 75 of the section 71, against the bend.
  • the control member 29 moves from its first stable position to its second stable position by a rotation of about 90 °, that is, a quarter turn. In this position, it is the section 69 of the cam surface which is substantially perpendicular to the direction of travel Y of the valve and which cooperates with the cam follower 67.
  • the section 69 is relatively more distant from the axis of the cam. X rotation that the section 71, so that in this second stable position the shutter 39 of the valve is not pressed against the sealing seat 51.
  • the section 69 has a flat 76 which abuts the elbow 73. In the second stable position, illustrated in FIG. 3, the cam follower 67 is wedged on the flat 76.
  • valve 25 In this second stable position, the valve 25 is able to be moved from its disengaged position to its closed position, for example under the effect of an overpressure inside the first chamber 9 or by the force of the elastomeric membrane on the valve. In this case, the end 67 of the cam follower rod is detached from the section 69 and sinks into the internal volume 60.
  • the first and second positions of the control member are said to be stable for the following reasons.
  • the cam follower 67 is positioned on the first section 71, at a distance of the end 75. Under the effect of the return force of the spring 27, the cam follower 67 exerts a torque on the control member, which pivots the latter until the cam follower has slipped along the section 71 to the section 69, and more precisely to the flat 76.
  • the elastic member will transmit a force on the Y direction cam follower 67, which by the intermediate of the cam surface will generate a torque on the control member 29 so as to complete the rotational movement.
  • the outlet duct 37 is closed by a solid area of the control member.
  • the ducts 37 and 38 are fluidly in communication with each other, through the slot 65.
  • the control member 29 also comprises a second circumferential slot 79, intended to limit the rotational stroke of the control member relative to the hollow body 15.
  • the valve comprises a screw stopper 81 rigidly fixed to the hollow body 15 and engaged in the second slot 79.
  • the slot 79 extends circumferentially over a quarter turn of the periphery of the control member.
  • the stop screw 81 In the first stable position of the control member, the stop screw 81 abuts at one end of the slot 79. In the second stable position, the stop screw 81 abuts against the other circumferential end. of the second slot 79. This ensures in particular that the cam follower 67 can not escape out of the cam surface.
  • the section 59 for actuating the plug has an imprint designed to receive a tool, for example a key for driving the plug in rotation about the axis X.
  • the valve 25 has an anti-extrusion function vis-à-vis the expansive envelope 7. Indeed, this envelope 7 can not expand until it engages in the inlet 19. If it expands uncontrollably, its end opposite the self-sealing valve 13 comes into contact with the shutter 39, and forces the valve 25 against the sealing seat 51.
  • the filling of the hydraulic accumulator 3 is done in the workshop, that is to say before mounting on board the vehicle.
  • the first chamber 9 is thus placed in communication with the outside of the hydraulic accumulator, through the passage duct 17.
  • the outlet 21 of the passage duct is connected to an oil source, and the first chamber 9 is filled. of oil from the source through the passageway.
  • the control member is placed in its first stable position.
  • the first chamber 9 is isolated from the passage duct. The fluid can no longer escape from the first chamber.
  • the gas is then injected inside the extensible casing 7, via the self-sealing valve 13.
  • the hydraulic accumulator 3, provided with the valve 1, is then mounted on board the vehicle.
  • the expandable envelope 7 is first filled with the gas and the first chamber is then filled with the oil.
  • the outlet 21 of the passage duct is connected to the vehicle oil circuit, for example to the deceleration energy recovery circuit.
  • the vacuum valve 37 is connected to a suction member, for example to a vacuum pump.
  • the suction member is then triggered, so as to evacuate the air from the passage duct 17.
  • the passage duct 17 is then filled with oil, for example from a filling system.
  • control member is placed in its second stable position, thus bringing into communication the first chamber 9 of the hydraulic accumulator and the passage duct 17. If the operator does not perform a complete quarter turn by making passing the control member from its first stable position to its second stable position, this control member does not remain in an intermediate position. On the contrary, the return force of the spring urges the control member in rotation about the X axis, through the cam follower 67 cooperating with the cam surface 62. The control member 29 is forced to continue its rotation to the second stable position. This effect is obtained because of the shape of the cam surface.
  • the isolation valve does not comprise a counter-flange cooperating with the hollow body to clamp the peripheral edge of the orifice of the hydraulic accumulator.
  • the hollow body 15 is attached to one end of the rigid enclosure 5, with the interposition of a seal.
  • the inlet 19 of the passage duct 17 opens directly into the first chamber 9.
  • the sealing seat 51 associated with the valve is formed directly on the hollow body 15.
  • the sealing seat is here annular, and not conical as in the embodiment of Figures 1 to 4.
  • the orifice 47 for guiding the valve in translation is formed directly in the hollow body.
  • the compression spring 27 is interposed either between the counter-flange and the shutter, but between the hollow body and the shutter.
  • control member 29 is no longer a rotary cylindrical plug, but a lever sliding against the hollow body 15 via the cam surface 62.
  • the control member 29 moves between its first and second stable positions in a general rotational movement relative to the hollow body 15, during which the lever rolls against the hollow body 15, with sliding of the cam surface 62 against the outer surface of the hollow body, so that the lever moves parallel to the outer surface.
  • the control member 29 is entirely located outside the hollow body 15. It comprises a cam portion 83, and a gripping portion 85, integral with the cam portion.
  • the outer surface of the cam portion 83 defines the first and second sections 69 and 71, and the elbow 73.
  • the sections 69 and 71 are biased by the spring 27 bearing against a surface of 87 support of the hollow body.
  • the surface 87 extends in a plane substantially perpendicular to the direction of displacement Y of the valve.
  • the cam portion 83 has an axis 89 engaged in oblong holes 91 formed in the stem 41 of the valve.
  • the oblong holes 91 are elongated in the Y direction.
  • the first stable position is illustrated in Figure 6.
  • the second section 71 of the cam surface bears on the surface 87 of the hollow body.
  • the axis 89 is located at one end of the oblong hole 91 opposite the shutter 39.
  • the gripping portion 85 is in the extension of the rod 41.
  • the spacing between the axis 89 and the section 71 is such that the shutter 39 is pressed against the sealing surface, against the restoring force of the spring 27.
  • the second stable position is illustrated in FIG. 5.
  • the first section 69 of the cam surface is pressed against the bearing surface 87.
  • the distance between the axis 89 and the section 69 is less than distance between the axis 89 and the section 71.
  • the axis 89 is located at the end of the oblong holes 91 opposite the shutter 39. The shutter 39 is not pressed against the sealing surface.
  • the grip portion 85 is substantially perpendicular to the rod 41.
  • the isolation valve 1 comprises a locking member 93 of the lever in the second stable position.
  • This body is here a clamp rigidly attached to the hollow body 15.
  • the gripping portion 85 of the lever is snap-fastened with the clip 93 removably in the second stable position.
  • valve 25 In the second stable position, the valve 25 is slidable from its disengaged position to its closed position. This has the effect of causing sliding of the oblong holes 91 with respect to the axis 89.
  • the cam portion 83 has two flanges placed opposite each other, the axis 89 extending from one flange to the other.
  • the rod 41 comprises two flanges vis-à-vis, each flange having an oblong hole.
  • the cam portion 83 is engaged between the two flanges and carries two lugs 89 pointing in opposite directions towards the flanges, and engaged in the oblong holes.
  • the lugs define the axis 89.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

The invention relates to a valve (1) which comprises: a hollow body (15) that comprises a passage conduit (17) for a fluid, having an inlet (19) and an outlet (21); a globe (25) movable relative to the hollow body (15) between an inlet closing position (19) and an inlet opening position (19); and a resilient member (27) returning the globe (25) to the opening position of same. The valve (1) includes a control member (29) linked to the globe (25), selectively movable with respect to the hollow body (15) between a first stable position in which the control member (29) immobilises the globe (25) in the closing position, and a second stable position in which the globe (25) is free to move between the closing position and the opening position of same.

Description

Vanne d'isolement d'un accumulateur hydraulique, ensemble équipé d'une telle vanne, procédé de montage correspondant  Isolating valve of a hydraulic accumulator, together with such a valve, corresponding mounting method
La présente invention concerne en général les accumulateurs hydrauliques. The present invention generally relates to hydraulic accumulators.
Plus précisément, l'invention concerne, selon un premier aspect, une vanne d'isolement d'un accumulateur hydraulique, du type comprenant :  More specifically, the invention relates, in a first aspect, to an isolation valve of a hydraulic accumulator, of the type comprising:
- un corps creux comportant un conduit de passage pour un fluide ayant une entrée et une sortie, l'entrée étant prévue pour être raccordée à un orifice de l'accumulateur hydraulique ;  a hollow body comprising a passage duct for a fluid having an inlet and an outlet, the inlet being designed to be connected to an orifice of the hydraulic accumulator;
- une soupape anti-extrusion mobile par rapport au corps creux entre une position d'obturation de l'entrée et une position de dégagement de l'entrée ; - An anti-extrusion valve movable relative to the hollow body between a closed position of the inlet and a release position of the inlet;
- un organe élastique rappelant la soupape vers sa position de dégagement.  an elastic member reminding the valve towards its release position.
Il est connu d'équiper un accumulateur hydraulique d'une telle vanne. Elle permet d'isoler l'intérieur de l'accumulateur hydraulique du conduit de passage en cas de surpression à l'intérieur de l'accumulateur. Quand l'accumulateur est de type à membrane, la soupape empêche l'extrusion de la membrane sur les bords de l'entrée du conduit de passage.  It is known to equip a hydraulic accumulator of such a valve. It makes it possible to isolate the interior of the hydraulic accumulator from the passage duct in the event of overpressure inside the accumulator. When the accumulator is of membrane type, the valve prevents extrusion of the membrane on the edges of the entrance of the passage duct.
Par ailleurs, il est connu de prévoir un organe d'isolement, par exemple une vanne à boisseau, en sortie du conduit de passage, en plus de la soupape anti-extrusion.  Furthermore, it is known to provide an isolating member, for example a plug valve, at the outlet of the passage duct, in addition to the anti-extrusion valve.
En effet, les accumulateurs sont utilisés à bords de véhicules comme dispositifs de stockage d'énergie. Ils comportent en général deux chambres, l'une contenant un liquide tel qu'une huile, et l'autre du gaz. La vanne à boisseau, placée en sortie de la chambre contenant l'huile, permet d'autoriser ou d'empêcher la circulation d'huile entre l'accumulateur et le reste du véhicule.  Indeed, accumulators are used on vehicles as energy storage devices. They generally comprise two chambers, one containing a liquid such as an oil, and the other gas. The ball valve, placed at the outlet of the chamber containing the oil, makes it possible to allow or prevent the circulation of oil between the accumulator and the rest of the vehicle.
L'accumulateur est rempli d'huile en atelier, puis monté à bord du véhicule. La vanne à boisseau est ouverte pendant le remplissage, puis fermée pour isoler la chambre contenant l'huile pendant le raccordement du conduit de passage au circuit d'huile du véhicule. La fermeture de la vanne à boisseau permet notamment de transporter l'accumulateur pré rempli en huile et de tirer au vide le conduit de passage pour effectuer son remplissage initial par de l'huile, une fois ce passage raccordé au circuit du véhicule. La vanne à boisseau est ensuite de nouveau ouverte pour permettre le fonctionnement de l'accumulateur. Elle reste alors normalement ouverte en permanence, par exemple jusqu'à ce que l'accumulateur soit démonté.  The accumulator is filled with oil in the workshop and then mounted in the vehicle. The ball valve is opened during filling and then closed to isolate the chamber containing the oil during the connection of the passage conduit to the vehicle oil circuit. The closure of the ball valve makes it possible in particular to transport the pre-filled accumulator in oil and to draw the passage duct empty for initial filling with oil, once this passage connected to the circuit of the vehicle. The ball valve is then opened again to allow the operation of the accumulator. It then remains normally open continuously, for example until the battery is removed.
Le fait d'avoir une soupape anti-extrusion plus une vanne à boisseau en sortie de l'accumulateur augmente les coûts et l'encombrement. Dans ce contexte, l'invention vise à simplifier le raccordement entre l'accumulateur et le véhicule et à le rendre moins encombrant. Having an anti-extrusion valve plus a plug valve at the outlet of the accumulator increases costs and bulk. In this context, the invention aims to simplify the connection between the battery and the vehicle and make it less bulky.
A cette fin, l'invention porte sur une vanne d'isolement d'un accumulateur hydraulique du type précité, caractérisée en ce que la dite vanne comprend un organe de commande lié à la soupape anti-extrusion, mobile sélectivement par rapport au corps creux entre une première position stable dans laquelle l'organe de commande bloque la soupape en position d'obturation, et une seconde position stable dans laquelle la soupape est libre de débattre entre sa position d'obturation et sa position de dégagement.  To this end, the invention relates to an isolation valve of a hydraulic accumulator of the aforementioned type, characterized in that said valve comprises a control member connected to the anti-extrusion valve, movable selectively with respect to the hollow body between a first stable position in which the control member blocks the valve in the closed position, and a second stable position in which the valve is free to debate between its closed position and its disengaged position.
Ainsi, la soupape anti-extrusion fait office d'organe d'isolement. Ceci permet de simplifier le raccordement entre l'accumulateur et le véhicule et de le rendre moins encombrant.  Thus, the anti-extrusion valve acts as an isolation device. This simplifies the connection between the battery and the vehicle and make it less bulky.
Avantageusement, l'organe de commande présente une surface de came agencée pour que, quand l'organe de commande est placé à une position intermédiaire entre ses première et seconde positions stables, l'organe élastique déplace l'organe de commande jusqu'à la seconde position stable.  Advantageously, the control member has a cam surface arranged so that, when the control member is placed at an intermediate position between its first and second stable positions, the elastic member moves the control member to the second stable position.
En variante, l'organe élastique déplace l'organe de commande jusqu'à la première position stable.  Alternatively, the elastic member moves the control member to the first stable position.
Ainsi, la valve est toujours soit dans sa position de dégagement soit dans sa position d'obturation.  Thus, the valve is always either in its disengaged position or in its closed position.
Ceci est particulièrement important notamment quand l'accumulateur hydraulique est utilisé pour la récupération de l'énergie de décélération du véhicule. L'énergie est stockée dans l'accumulateur en transférant de l'huile dans la chambre de l'accumulateur, l'huile comprimant le gaz dans l'autre chambre. Cette énergie pourra ensuite être restituée, notamment lors d'un démarrage ou pour une accélération brusque lorsque qu'un surcroît de puissance est nécessaire.  This is particularly important especially when the hydraulic accumulator is used for the recovery of the deceleration energy of the vehicle. The energy is stored in the accumulator by transferring oil into the chamber of the accumulator, the oil compressing the gas in the other chamber. This energy can then be restored, especially during a start or for a sudden acceleration when more power is needed.
Pour le bon fonctionnement du système, l'huile doit pouvoir circuler entre l'accumulateur et le circuit du véhicule avec un minimum de perte de charge. Quand l'accumulateur est équipé d'une soupape anti-extrusion de l'état de la technique doublé d'une vanne à boisseau, il arrive que l'opérateur qui monte l'accumulateur sur le véhicule ne rouvre pas complètement la vanne à boisseau. Ceci a pour effet de créer une perte de charge importante et de réduire considérablement les performances du système de récupération d'énergie.  For the correct operation of the system, the oil must be able to circulate between the accumulator and the vehicle circuit with a minimum of pressure drop. When the accumulator is fitted with a state-of-the-art anti-extrusion valve coupled with a plug valve, the operator who installs the accumulator on the vehicle may not fully reopen the ball valve. . This has the effect of creating a significant pressure drop and significantly reduce the performance of the energy recovery system.
Avec la vanne de l'invention, un tel problème ne peut pas se produire, car l'organe de commande ne peut pas rester en position intermédiaire.  With the valve of the invention, such a problem can not occur because the control member can not remain in the intermediate position.
La vanne peut encore comporter une ou plusieurs des caractéristiques ci-dessous, considérées individuellement ou selon toutes les combinaisons techniquement possibles : - la soupape comporte un obturateur et une tige liée à l'obturateur et coopérant avec l'organe de commande ; The valve may further include one or more of the following features, considered individually or in any technically feasible combination: - The valve comprises a shutter and a rod connected to the shutter and cooperating with the control member;
- la surface de came comporte des premier et second tronçons sensiblement perpendiculaire l'un à l'autre, raccordés par un coude ayant un faible rayon de courbure ;  the cam surface comprises first and second sections substantially perpendicular to each other, connected by a bend having a small radius of curvature;
- l'organe de commande est un boisseau rotatif engagé dans le corps creux, ayant un axe de rotation sensiblement perpendiculaire à une direction de déplacement de la soupape entre ses positions d'obturation et de dégagement ;  - The control member is a rotary plug engaged in the hollow body, having an axis of rotation substantially perpendicular to a direction of movement of the valve between its closed positions and release;
- le boisseau est creux, la surface de came étant ménagé sur une surface radialement interne du boisseau, la soupape comportant un suiveur de came coopérant avec la surface de came ;  - The plug is hollow, the cam surface being formed on a radially inner surface of the plug, the valve having a cam follower cooperating with the cam surface;
- l'organe de commande est un levier glissant contre le corps creux par l'intermédiaire de la surface de came ;  - The control member is a lever sliding against the hollow body through the cam surface;
- une tige de la soupape comporte au moins un trou oblong allongé parallèlement à la tige, le levier comportant au moins un axe engagé dans le trou oblong ;  a stem of the valve comprises at least one oblong hole elongated parallel to the rod, the lever comprising at least one axis engaged in the oblong hole;
- elle comporte un organe de blocage du levier dans la seconde position stable.  - It comprises a locking member of the lever in the second stable position.
Selon un second aspect, l'invention porte sur un ensemble comportant un accumulateur hydraulique et une vanne d'isolement dudit accumulateur hydraulique, présentant les caractéristiques ci-dessus, l'accumulateur hydraulique comportant une enceinte rigide et une enveloppe expansible logée dans l'enceinte rigide, la soupape en position de dégagement faisant saillie à l'intérieur de l'enceinte rigide à travers l'orifice pour empêcher l'enveloppe expansible de pénétrer dans l'entrée. According to a second aspect, the invention relates to an assembly comprising a hydraulic accumulator and an isolation valve of said hydraulic accumulator, having the above characteristics, the hydraulic accumulator comprising a rigid enclosure and an expandable envelope housed in the enclosure rigid, the valve in the disengaged position protruding inside the rigid enclosure through the orifice to prevent the expansive envelope from entering the inlet.
Selon un troisième aspect, l'invention porte sur un procédé de montage à bord d'un véhicule d'un accumulateur hydraulique équipé d'une vanne d'isolement ayant les caractéristiques ci-dessus, le procédé comprenant les étapes suivantes :  According to a third aspect, the invention relates to a method of mounting on board a vehicle of a hydraulic accumulator equipped with an isolation valve having the above characteristics, the method comprising the following steps:
- placer l'organe de commande dans sa seconde position stable ;  placing the control member in its second stable position;
- remplir l'accumulateur hydraulique avec un fluide, à travers le conduit de passage ; - Fill the hydraulic accumulator with a fluid, through the conduit passage;
- placer l'organe de commande dans sa première position stable ; placing the control member in its first stable position;
- monter l'accumulateur hydraulique à bord du véhicule et raccorder la sortie du conduit de passage à un circuit de fluide du véhicule ;  - Mount the hydraulic accumulator on board the vehicle and connect the outlet of the passage duct to a fluid circuit of the vehicle;
- placer l'organe de commande dans sa seconde position stable.  - place the control unit in its second stable position.
Typiquement, l'accumulateur hydraulique est rempli de fluide dans un atelier de remplissage. Il est monté à bord du véhicule dans une usine terminale de fabrication du véhicule, éloignée de l'atelier de fabrication. Il est transporté depuis l'atelier de remplissage jusqu'à l'usine terminale avec l'organe de commande en première position. D'autres avantages et caractéristiques de l'invention ressortiront de la description détaillée qui en est donné ci-dessous, à titre indicatif et nullement limitatif, en référence aux figures annexées, parmi lesquelles : Typically, the hydraulic accumulator is filled with fluid in a filling workshop. He boarded the vehicle in a terminal manufacturing plant, away from the manufacturing facility. It is transported from the filling plant to the terminal plant with the control unit in first position. Other advantages and features of the invention will emerge from the detailed description given below, for information only and in no way limitative, with reference to the appended figures, among which:
- la figure 1 est une vue en coupe de l'ensemble comportant un accumulateur et une vanne d'isolement selon un premier mode de réalisation de la vanne ;  - Figure 1 is a sectional view of the assembly comprising an accumulator and an isolation valve according to a first embodiment of the valve;
- la figure 2 est une vue éclatée et en perspective de la vanne selon le premier mode de réalisation ;  - Figure 2 is an exploded perspective view of the valve according to the first embodiment;
- les figures 3 et 4 sont, respectivement, des vues en coupe de la vanne selon le premier mode de réalisation, lorsque la vanne est en position ouverte et lorsque la vanne est en position fermée ; et  - Figures 3 and 4 are, respectively, sectional views of the valve according to the first embodiment, when the valve is in the open position and when the valve is in the closed position; and
- les figures 5 et 6 sont, respectivement, des vues en coupe de la vanne selon un second mode de réalisation, lorsque la vanne est en position ouverte et lorsque la valve est en position fermée.  - Figures 5 and 6 are, respectively, sectional views of the valve according to a second embodiment, when the valve is in the open position and when the valve is in the closed position.
Comme visible sur la figure 1 , la vanne 1 est montée sur un accumulateur hydraulique 3, destiné lui-même à être embarqué à bord d'un véhicule. Ce véhicule est par exemple un véhicule automobile, tel qu'une voiture, un camion, un véhicule tout terrain etc.  As shown in Figure 1, the valve 1 is mounted on a hydraulic accumulator 3, itself intended to be embedded in a vehicle. This vehicle is for example a motor vehicle, such as a car, a truck, an all-terrain vehicle etc.
Il est par exemple intégré dans un circuit de récupération de l'énergie de décélération de ce véhicule.  It is for example integrated in a circuit for recovering the deceleration energy of the vehicle.
Un tel circuit est décrit par exemple dans la demande de brevet portant le numéro Such a circuit is described for example in the patent application bearing the number
FR 1254170 ou FR 1257783. FR 1254170 or FR 1257783.
L'accumulateur hydraulique 3 comporte une enceinte rigide 5 et une enveloppe expansible 7 logée dans l'enceinte rigide 5. L'enceinte 5 délimite intérieurement un volume interne divisé en deux chambres 9, 1 1 par l'enveloppe expansible 7. La première chambre 9 est remplie par un fluide, qui est ici une huile. La seconde chambre 1 1 est remplie par un gaz inerte, ayant des caractéristiques thermodynamiques compatibles avec le fonctionnement de l'accumulateur. Ce gaz est ici de l'azote, mais pourrait être aussi de l'hélium.  The hydraulic accumulator 3 comprises a rigid enclosure 5 and an expandable envelope 7 housed in the rigid enclosure 5. The enclosure 5 internally delimits an internal volume divided into two chambers 9, 1 1 by the expandable envelope 7. The first chamber 9 is filled with a fluid, which is here an oil. The second chamber 1 1 is filled with an inert gas, having thermodynamic characteristics compatible with the operation of the accumulator. This gas is here nitrogen, but could also be helium.
L'enveloppe expansible 7, dans l'exemple représenté, délimite un volume entièrement fermé correspondant à la seconde chambre 1 1 . Elle est raccordée à l'extérieure de l'accumulateur 3 par le biais d'une valve 13 auto obturante, fixée à l'enceinte rigide 5.  The expandable envelope 7, in the example shown, delimits a fully closed volume corresponding to the second chamber January 1. It is connected to the outside of the battery 3 by means of a self-sealing valve 13 fixed to the rigid enclosure 5.
La vanne d'isolement 1 comporte :  The isolation valve 1 comprises:
- un corps creux 15 comportant un conduit de passage 17 ayant une entrée 19 et une sortie 21 , l'entrée 19 étant prévue pour être raccordée à un orifice 23 de l'accumulateur hydraulique ; - une soupape anti-extrusion 25 mobile par rapport au corps creux 15 entre une position d'obturation de l'entrée 19 et une position de dégagement de l'entrée 19 ; - A hollow body 15 having a passage conduit 17 having an inlet 19 and an outlet 21, the inlet 19 being provided to be connected to an orifice 23 of the hydraulic accumulator; - An anti-extrusion valve 25 movable relative to the hollow body 15 between a closed position of the inlet 19 and a release position of the inlet 19;
- un organe élastique 27 rappelant la soupape 25 vers sa position de dégagement ; - an elastic member 27 biasing the valve 25 to its release position;
- un organe de commande 29 lié à la soupape 25, mobile sélectivement par rapport au corps creux 15 entre une première position stable dans laquelle l'organe de commande 29 bloque la soupape 25 dans sa position d'obturation, et une seconde position stable dans laquelle la soupape 25 est libre de débattre entre sa position d'obturation et sa position de dégagement. - A control member 29 connected to the valve 25, selectively movable relative to the hollow body 15 between a first stable position in which the control member 29 blocks the valve 25 in its closed position, and a second stable position in which the valve 25 is free to debate between its closed position and its release position.
Le corps creux 15 est par exemple une pièce massive, en matière plastique ou en métal. Elle est par exemple obtenue par injection de matière plastique ou par usinage d'une pièce métallique.  The hollow body 15 is for example a solid piece, plastic or metal. It is for example obtained by plastic injection or by machining a metal part.
Comme visible sur la figure 2, une valve de tirage au vide 31 est raccordée en dérivation sur le conduit de passage 17, de manière à permettre le tirage au vide du conduit 17. La valve 31 est rigidement fixée dans un évidement 33 du corps creux 15. Elle communique d'un côté avec le passage 17. De l'autre côté, elle présente un raccord susceptible d'être accouplé avec une pompe à vide par exemple.  As can be seen in FIG. 2, an evacuation valve 31 is connected in shunt to the passage duct 17, so as to allow the duct 17 to be drawn to a vacuum. The valve 31 is rigidly fixed in a recess 33 of the hollow body 15. It communicates on one side with the passage 17. On the other side, it has a coupling that can be coupled with a vacuum pump for example.
La valve 1 comporte encore une contre-bride 35, permettant la fixation du corps creux 15 à l'enceinte rigide 5 de l'accumulateur hydraulique.  The valve 1 further comprises a counter-flange 35, for fixing the hollow body 15 to the rigid enclosure 5 of the hydraulic accumulator.
Comme visible sur la figure 1 , le bord périphérique de l'orifice 23 est pincé de manière étanche entre le corps creux 15 et la contre-bride 35. La contre-bride 35 est placée à l'intérieur de la première chambre 9.  As can be seen in FIG. 1, the peripheral edge of the orifice 23 is clamped sealingly between the hollow body 15 and the counter-flange 35. The counter-flange 35 is placed inside the first chamber 9.
Comme visible sur les figures 2, 3 et 4, le corps creux 15 présente un évidement central 36 dans lequel est engagé l'organe de commande 29, et des conduits 37, 38 de sortie et d'entrée raccordant respectivement l'évidement central 36 l'un à la sortie 21 et l'autre à l'entrée 19.  As can be seen in FIGS. 2, 3 and 4, the hollow body 15 has a central recess 36 in which the control member 29 is engaged, and outlet and inlet ducts 37, 38 respectively connecting the central recess 36 one at the exit 21 and the other at the entrance 19.
La soupape 25 comporte un obturateur 39 et une tige 41 . L'obturateur 39 présente la forme générale d'un disque, la tige 41 s'étendant à partir du centre d'une des deux grandes faces du disque. L'obturateur 39 est engagé dans la première chambre 9 de l'accumulateur hydraulique, la tige 41 traversant successivement la contre-bride 35 et le conduit d'entrée 38, et débouchant dans l'évidement central 36 du corps creux.  The valve 25 comprises a shutter 39 and a rod 41. The shutter 39 has the general shape of a disc, the rod 41 extending from the center of one of the two large faces of the disc. The shutter 39 is engaged in the first chamber 9 of the hydraulic accumulator, the rod 41 passing successively through the flange 35 and the inlet duct 38, and opening into the central recess 36 of the hollow body.
La soupape 25 se déplace entre sa position d'obturation et sa position de dégagement selon un mouvement de translation suivant une direction Y, matérialisée notamment sur les figures 3 et 4.  The valve 25 moves between its closed position and its release position in a translation movement in a direction Y, shown in particular in Figures 3 and 4.
La contre-bride 35 présente des première et seconde grandes faces 43, 45 opposées l'une à l'autre, l'une tournée vers l'intérieur de la première chambre 9 et l'autre tournée vers le corps creux 15. Elle est traversée par un orifice central 47 dans laquelle est engagée la tige 41 de la soupape. L'orifice central 47 guide en coulissement la tige 41 . The counter-flange 35 has first and second large faces 43, 45 opposite to each other, one facing the inside of the first chamber 9 and the other turned towards the hollow body 15. It is traversed by a central orifice 47 in which is engaged the rod 41 of the valve. The central orifice 47 slidably guides the rod 41.
La contre-bride 35 comporte également une pluralité d'orifices périphériques 49 pour le passage de l'huile. Les orifices 47 et 49 traversent entièrement la contre-bride. Les orifices 49 sont répartis sur un cercle, autour de l'orifice central 47.  The counter flange 35 also has a plurality of peripheral orifices 49 for the passage of the oil. The orifices 47 and 49 completely cross the counter flange. The orifices 49 are distributed on a circle around the central orifice 47.
La première grande face 43 est conformée de manière à créer un siège d'étanchéité 51 , qui entoure les orifices 49. Dans la position d'obturation de la soupape 25, l'obturateur 39 vient porter contre le siège d'étanchéité 51 , obturant à la fois les orifices 49 et l'orifice 47.  The first large face 43 is shaped to create a sealing seat 51, which surrounds the orifices 49. In the closed position of the valve 25, the shutter 39 bears against the sealing seat 51, shutting both the orifices 49 and the orifice 47.
La seconde grande face 45 de la bride porte un bossage central 53, traversé par les orifices 47 et 49. Le bossage 53 est engagé dans l'entrée 19 du conduit 17, avec interposition d'un joint d'étanchéité 55.  The second large face 45 of the flange carries a central boss 53, through which the orifices 47 and 49 pass. The boss 53 is engaged in the inlet 19 of the duct 17, with the interposition of a seal 55.
Le ressort 27 est un ressort de compression en spirale, interposé entre la contre- bride 35 et l'obturateur 39.  The spring 27 is a spiral compression spring interposed between the counter-flange 35 and the shutter 39.
L'organe de commande 29 est un boisseau de forme générale cylindrique. L'organe de commande 29 comporte un tronçon d'entraînement 57 engagé dans l'évidement 36 du corps creux et coopérant avec la tige 41 , et un tronçon d'actionnement 59 faisant saillie hors du corps creux.  The control member 29 is a plug of generally cylindrical shape. The control member 29 comprises a drive section 57 engaged in the recess 36 of the hollow body and cooperating with the rod 41, and an actuating section 59 projecting from the hollow body.
L'organe de commande 29 réalise l'entraînement de la soupape 25 en se déplaçant selon un mouvement rotatif autour d'un axe X sensiblement perpendiculaire à la direction Y. L'axe X est visible notamment sur la figure 2. L'évidement 36 forme un palier de guidage en rotation de l'organe de commande 29. Il a une forme générale cylindrique et présente un diamètre très légèrement supérieur à celui du tronçon 57.  The control member 29 carries out the drive of the valve 25 by moving in a rotary movement about an axis X substantially perpendicular to the direction Y. The X axis is visible in particular in Figure 2. The recess 36 forms a guide bearing in rotation of the control member 29. It has a generally cylindrical shape and has a diameter slightly greater than that of the section 57.
Le tronçon 57 est partiellement creux, et délimite intérieurement une surface de came qui coopère avec la tige 41 de la soupape pour déplacer celle-ci entre ses positions d'entraînement et de dégagement. Plus précisément, le tronçon 57 comporte intérieurement un volume creux 60 délimité par une paroi interne 61 sur laquelle est ménagée la surface de came 62. Le tronçon 57 présente une fente circonférentielle 65, débouchant dans le volume interne 60, dans lequel est engagée la tige 41 . L'extrémité 67 de la tige 41 , à l'opposé de l'obturateur 39, est engagée à l'intérieur du volume interne 60, et forme un suiveur de came coopérant avec la surface de came 62 pour l'entraînement de la soupape 25.  The section 57 is partially hollow, and defines internally a cam surface which cooperates with the valve stem 41 to move it between its driving and disengaging positions. More specifically, the section 57 internally comprises a hollow volume 60 delimited by an inner wall 61 on which is formed the cam surface 62. The section 57 has a circumferential slot 65, opening into the internal volume 60, in which the rod is engaged. 41. The end 67 of the rod 41, opposite the shutter 39, is engaged inside the internal volume 60, and forms a cam follower cooperating with the cam surface 62 for driving the valve 25.
La surface de came 62 comporte des premier et second tronçons 69 et 71 sensiblement perpendiculaire l'un à l'autre, raccordé l'un à l'autre par un coude 73 ayant un faible rayon de courbure. La première position stable de l'organe de commande 29 est représentée sur la figure 4. Dans cette position, le suiveur de came 67 coopère avec le tronçon 71 de la surface de came. Ce tronçon est sensiblement perpendiculaire à la direction Y. Le tronçon 71 présente une légère pente depuis le coude 73 jusqu'à une extrémité 75 du tronçon 71 opposée au coude 73. A l'extrémité 75, la paroi interne 61 de l'organe de commande fait un coude à sensiblement 90°. Dans la première posit ion stable, le suiveur de came 67 est calé à l'extrémité 75 du tronçon 71 , contre le coude. The cam surface 62 has first and second sections 69 and 71 substantially perpendicular to each other, connected to one another by a bend 73 having a small radius of curvature. The first stable position of the control member 29 is shown in FIG. 4. In this position, the cam follower 67 cooperates with the section 71 of the cam surface. This section is substantially perpendicular to the direction Y. The section 71 has a slight slope from the elbow 73 to an end 75 of the section 71 opposite the elbow 73. At the end 75, the inner wall 61 of the command makes a bend at substantially 90 °. In the first stable position, the cam follower 67 is wedged at the end 75 of the section 71, against the bend.
L'organe de commande 29 passe de sa première position stable à sa seconde position stable par une rotation d'environ 90° c'e st-à-dire un quart de tour. Dans cette position, c'est le tronçon 69 de la surface de came qui est sensiblement perpendiculaire à la direction de déplacement Y de la soupape et qui coopère avec le suiveur de came 67. Le tronçon 69 est relativement plus écarté de l'axe de rotation X que le tronçon 71 , de telle sorte que dans cette seconde position stable l'obturateur 39 de la soupape n'est pas plaqué contre le siège d'étanchéité 51 . Le tronçon 69 présente un plat 76 qui jouxte le coude 73. Dans la seconde position stable, illustrée sur la figure 3, le suiveur de came 67 est calé sur le plat 76.  The control member 29 moves from its first stable position to its second stable position by a rotation of about 90 °, that is, a quarter turn. In this position, it is the section 69 of the cam surface which is substantially perpendicular to the direction of travel Y of the valve and which cooperates with the cam follower 67. The section 69 is relatively more distant from the axis of the cam. X rotation that the section 71, so that in this second stable position the shutter 39 of the valve is not pressed against the sealing seat 51. The section 69 has a flat 76 which abuts the elbow 73. In the second stable position, illustrated in FIG. 3, the cam follower 67 is wedged on the flat 76.
Dans cette seconde position stable, la soupape 25 est susceptible d'être déplacée à partir de sa position de dégagement vers sa position d'obturation, par exemple sous l'effet d'une surpression à l'intérieure de la première chambre 9 ou par l'effort de la membrane élastomère sur la soupape. Dans ce cas, l'extrémité 67 de la tige formant suiveur de came est décollée du tronçon 69 et s'enfonce dans le volume interne 60.  In this second stable position, the valve 25 is able to be moved from its disengaged position to its closed position, for example under the effect of an overpressure inside the first chamber 9 or by the force of the elastomeric membrane on the valve. In this case, the end 67 of the cam follower rod is detached from the section 69 and sinks into the internal volume 60.
Les première et seconde positions de l'organe de commande sont dites stables pour des raisons suivantes.  The first and second positions of the control member are said to be stable for the following reasons.
Si en déplaçant l'organe de commande de sa seconde position stable à sa première position stable un opérateur interrompt le mouvement avant d'avoir effectué un quart de tour, le suiveur de came 67 vient se positionner sur le premier tronçon 71 , à distance de l'extrémité 75. Sous l'effet de la force de rappel du ressort 27, le suiveur de came 67 exerce un couple sur l'organe de commande, qui fait pivoter celui-ci jusqu'à ce que le suiveur de came ait glissé le long du tronçon 71 jusqu'au tronçon 69, et plus précisément jusqu'au plat 76.  If, by moving the control member from its second stable position to its first stable position, an operator interrupts the movement before having made a quarter turn, the cam follower 67 is positioned on the first section 71, at a distance of the end 75. Under the effect of the return force of the spring 27, the cam follower 67 exerts a torque on the control member, which pivots the latter until the cam follower has slipped along the section 71 to the section 69, and more precisely to the flat 76.
De même, si en passant de la première à la seconde position stable, l'opérateur n'effectue pas un quart de tour complet, l'organe élastique va transmettre un effort sur la direction Y au suiveur de came 67, qui par l'intermédiaire de la surface de came va générer un couple sur l'organe de commande 29 de manière à compléter le mouvement de rotation. Le fait que le coude 73 raccordant les premier et seconds tronçons 69 et 71 l'un à l'autre soit à faible rayon de courbure fait que ce coude est très court et n'offre pas de position stable pour le suiveur de came 67. Celui-ci glisse soit vers le tronçon 69 soit vers le tronçon 71 , sous l'effet de la force de rappel du ressort 27. Similarly, if passing from the first to the second stable position, the operator does not perform a full quarter turn, the elastic member will transmit a force on the Y direction cam follower 67, which by the intermediate of the cam surface will generate a torque on the control member 29 so as to complete the rotational movement. The fact that the elbow 73 connecting the first and second sections 69 and 71 to each other is of small radius of curvature makes this elbow very short and does not provide a stable position for the cam follower 67. This slips either towards the section 69 or towards the section 71, under the effect of the restoring force of the spring 27.
On notera que dans la première position d'obturation, le conduit de sortie 37 est obturé par une zone pleine de l'organe de commande. Au contraire, dans la seconde position stable, les conduits 37 et 38 sont fluidiquement en communication l'un avec l'autre, par le biais de la fente 65.  Note that in the first closed position, the outlet duct 37 is closed by a solid area of the control member. On the contrary, in the second stable position, the ducts 37 and 38 are fluidly in communication with each other, through the slot 65.
Comme visible sur la figure 2, l'organe de commande 29 comporte encore une seconde fente circonférentielle 79, prévue pour limiter la course de rotation de l'organe de commande par rapport au corps creux 15. Pour ce faire, la vanne comporte une vis d'arrêt 81 rigidement fixée au corps creux 15 et engagée dans la seconde fente 79. La fente 79 s'étend circonférentiellement sur un quart de tour de la périphérie de l'organe de commande. Dans la première position stable de l'organe de commande, la vis d'arrêt 81 est en butée à une extrémité de la fente 79. Dans la seconde position stable, la vis d'arrêt 81 est en butée contre l'autre extrémité circonférentielle de la seconde fente 79. Ceci permet de garantir notamment que le suiveur de came 67 ne peut pas s'échapper hors de la surface de came.  As can be seen in FIG. 2, the control member 29 also comprises a second circumferential slot 79, intended to limit the rotational stroke of the control member relative to the hollow body 15. To do this, the valve comprises a screw stopper 81 rigidly fixed to the hollow body 15 and engaged in the second slot 79. The slot 79 extends circumferentially over a quarter turn of the periphery of the control member. In the first stable position of the control member, the stop screw 81 abuts at one end of the slot 79. In the second stable position, the stop screw 81 abuts against the other circumferential end. of the second slot 79. This ensures in particular that the cam follower 67 can not escape out of the cam surface.
Le tronçon 59 d'actionnement du boisseau présente une empreinte prévue pour recevoir un outil, par exemple une clé permettant d'entraîner le boisseau en rotation autour de l'axe X.  The section 59 for actuating the plug has an imprint designed to receive a tool, for example a key for driving the plug in rotation about the axis X.
Comme visible sur la figure 1 , la soupape 25 a une fonction anti extrusion vis-à-vis de l'enveloppe expansible 7. En effet, cette enveloppe 7 ne peut pas s'expanser jusqu'à venir s'engager dans l'entrée 19. Si elle s'expanse de manière incontrôlée, son extrémité opposée à la valve auto obturante 13 vient en contact avec l'obturateur 39, et force la soupape 25 contre le siège d'étanchéité 51 .  As can be seen in FIG. 1, the valve 25 has an anti-extrusion function vis-à-vis the expansive envelope 7. Indeed, this envelope 7 can not expand until it engages in the inlet 19. If it expands uncontrollably, its end opposite the self-sealing valve 13 comes into contact with the shutter 39, and forces the valve 25 against the sealing seat 51.
Le procédé de montage de l'accumulateur hydraulique équipé de la vanne d'isolement selon l'invention représenté sur la figure 1 va maintenant être détaillé.  The method of mounting the hydraulic accumulator equipped with the isolation valve according to the invention shown in Figure 1 will now be detailed.
On considère une situation initiale où l'accumulateur hydraulique est vide, et séparé du véhicule.  An initial situation is considered in which the hydraulic accumulator is empty and separated from the vehicle.
Le remplissage de l'accumulateur hydraulique 3 est fait en atelier, c'est-à-dire avant montage à bord du véhicule. Pour ce faire, on place d'abord l'organe de commande 29 dans la seconde position stable. La première chambre 9 est ainsi mise en communication avec l'extérieur de l'accumulateur hydraulique, à travers le conduit de passage 17. La sortie 21 du conduit de passage est raccordée à une source d'huile, et la première chambre 9 est remplie d'huile à partir de la source à travers le conduit de passage. Une fois la première chambre 9 remplie à une pression appropriée, l'organe de commande est placé dans sa première position stable. Ainsi, la première chambre 9 est isolée du conduit de passage. Le fluide ne peut plus s'échapper de la première chambre. The filling of the hydraulic accumulator 3 is done in the workshop, that is to say before mounting on board the vehicle. To do this, we first place the control member 29 in the second stable position. The first chamber 9 is thus placed in communication with the outside of the hydraulic accumulator, through the passage duct 17. The outlet 21 of the passage duct is connected to an oil source, and the first chamber 9 is filled. of oil from the source through the passageway. A Once the first chamber 9 is filled to an appropriate pressure, the control member is placed in its first stable position. Thus, the first chamber 9 is isolated from the passage duct. The fluid can no longer escape from the first chamber.
Le gaz est ensuite injecté à l'intérieur de l'enveloppe extensible 7, via la valve auto- obturante 13. L'accumulateur hydraulique 3, muni de la valve 1 , est ensuite monté à bord du véhicule. En variante, l'enveloppe extensible 7 est d'abord remplie par le gaz et la première chambre est ensuite remplie par l'huile.  The gas is then injected inside the extensible casing 7, via the self-sealing valve 13. The hydraulic accumulator 3, provided with the valve 1, is then mounted on board the vehicle. Alternatively, the expandable envelope 7 is first filled with the gas and the first chamber is then filled with the oil.
La sortie 21 du conduit de passage est raccordée au circuit d'huile du véhicule, par exemple au circuit de récupération d'énergie de décélération. La valve de tirage au vide 37 est raccordée à un organe d'aspiration, par exemple à une pompe à vide.  The outlet 21 of the passage duct is connected to the vehicle oil circuit, for example to the deceleration energy recovery circuit. The vacuum valve 37 is connected to a suction member, for example to a vacuum pump.
L'organe d'aspiration est ensuite déclenché, de manière à évacuer l'air du conduit de passage 17.  The suction member is then triggered, so as to evacuate the air from the passage duct 17.
Le conduit de passage 17 est ensuite rempli avec de l'huile, par exemple provenant d'un système de remplissage.  The passage duct 17 is then filled with oil, for example from a filling system.
Enfin, l'organe de commande est placé dans sa seconde position stable, mettant ainsi en communication la première chambre 9 de l'accumulateur hydraulique et le conduit de passage 17. Si l'opérateur n'effectue pas un quart de tour complet en faisant passer l'organe de commande de sa première position stable à sa seconde position stable, cet organe de commande ne reste pas dans une position intermédiaire. Au contraire, la force de rappel du ressort sollicite l'organe de commande en rotation autour de l'axe X, par le biais du suiveur de came 67 coopérant avec la surface de came 62. L'organe de commande 29 est forcé de poursuivre sa rotation jusqu'à la seconde position stable. Cet effet est obtenu du fait de la forme de la surface de came.  Finally, the control member is placed in its second stable position, thus bringing into communication the first chamber 9 of the hydraulic accumulator and the passage duct 17. If the operator does not perform a complete quarter turn by making passing the control member from its first stable position to its second stable position, this control member does not remain in an intermediate position. On the contrary, the return force of the spring urges the control member in rotation about the X axis, through the cam follower 67 cooperating with the cam surface 62. The control member 29 is forced to continue its rotation to the second stable position. This effect is obtained because of the shape of the cam surface.
Un second mode de réalisation de l'invention va maintenant être détaillé, en référence aux figures 5 et 6. Seuls les points par lesquels ce second mode de réalisation diffère du premier seront détaillés ci-dessous.  A second embodiment of the invention will now be detailed, with reference to Figures 5 and 6. Only the points by which this second embodiment differs from the first will be detailed below.
Les éléments identiques ou assurant les mêmes fonctions dans les deux modes de réalisation seront désignés par les mêmes références.  Identical elements or providing the same functions in the two embodiments will be designated by the same references.
Dans le second mode de réalisation de l'invention, la vanne d'isolement ne comporte pas de contre-bride coopérant avec le corps creux pour pincer le bord périphérique de l'orifice de l'accumulateur hydraulique. Le corps creux 15 est rapporté sur une extrémité de l'enceinte rigide 5, avec interposition d'un joint d'étanchéité. L'entrée 19 du conduit de passage 17 débouche directement dans la première chambre 9.  In the second embodiment of the invention, the isolation valve does not comprise a counter-flange cooperating with the hollow body to clamp the peripheral edge of the orifice of the hydraulic accumulator. The hollow body 15 is attached to one end of the rigid enclosure 5, with the interposition of a seal. The inlet 19 of the passage duct 17 opens directly into the first chamber 9.
Le siège d'étanchéité 51 associé à la soupape est ménagé directement sur le corps creux 15. Le siège d'étanchéité est ici annulaire, et non conique comme dans le mode de réalisation des figures 1 à 4. L'orifice 47 de guidage en translation de la soupape est ménagé directement dans le corps creux. Le ressort de compression 27 est interposé non plus entre la contre-bride et l'obturateur, mais entre le corps creux et l'obturateur. The sealing seat 51 associated with the valve is formed directly on the hollow body 15. The sealing seat is here annular, and not conical as in the embodiment of Figures 1 to 4. The orifice 47 for guiding the valve in translation is formed directly in the hollow body. The compression spring 27 is interposed either between the counter-flange and the shutter, but between the hollow body and the shutter.
Par ailleurs, l'organe de commande 29 n'est plus un boisseau cylindrique rotatif, mais un levier glissant contre le corps creux 15 par l'intermédiaire de la surface de came 62.  Furthermore, the control member 29 is no longer a rotary cylindrical plug, but a lever sliding against the hollow body 15 via the cam surface 62.
L'organe de commande 29 se déplace entre ses première et seconde positions stables selon un mouvement général de rotation par rapport au corps creux 15, au cours duquel le levier roule contre le corps creux 15, avec glissement de la surface de came 62 contre la surface externe du corps creux, de telle sorte que le levier ne se déplace parallèlement à la surface externe.  The control member 29 moves between its first and second stable positions in a general rotational movement relative to the hollow body 15, during which the lever rolls against the hollow body 15, with sliding of the cam surface 62 against the outer surface of the hollow body, so that the lever moves parallel to the outer surface.
L'organe de commande 29 est entièrement situé à l'extérieur du corps creux 15. Il comporte une partie de came 83, et une partie de préhension 85, solidaire de la partie de came.  The control member 29 is entirely located outside the hollow body 15. It comprises a cam portion 83, and a gripping portion 85, integral with the cam portion.
Comme visible sur les figures 5 et 6, la surface externe de la partie de came 83 définie les premier et second tronçons 69 et 71 , et le coude 73. Les tronçons 69 et 71 sont rappelés par le ressort 27 en appui contre une surface d'appui 87 du corps creux. La surface 87 s'étend dans un plan sensiblement perpendiculaire à la direction de déplacement Y de la soupape. Dans ce but, la partie de came 83 comporte un axe 89 engagé dans des trous oblongs 91 ménagés dans la tige 41 de la soupape. Les trous oblongs 91 sont allongés suivant la direction Y.  As can be seen in FIGS. 5 and 6, the outer surface of the cam portion 83 defines the first and second sections 69 and 71, and the elbow 73. The sections 69 and 71 are biased by the spring 27 bearing against a surface of 87 support of the hollow body. The surface 87 extends in a plane substantially perpendicular to the direction of displacement Y of the valve. For this purpose, the cam portion 83 has an axis 89 engaged in oblong holes 91 formed in the stem 41 of the valve. The oblong holes 91 are elongated in the Y direction.
La première position stable est illustrée sur la figure 6. Dans cette position, le second tronçon 71 de la surface de came est en appui sur la surface 87 du corps creux. L'axe 89 est situé à une extrémité du trou oblong 91 opposée à l'obturateur 39. La partie de préhension 85 se situe dans le prolongement de la tige 41 . L'écartement entre l'axe 89 et le tronçon 71 est tel que l'obturateur 39 est plaqué contre la portée d'étanchéité, à rencontre de la force de rappel du ressort 27.  The first stable position is illustrated in Figure 6. In this position, the second section 71 of the cam surface bears on the surface 87 of the hollow body. The axis 89 is located at one end of the oblong hole 91 opposite the shutter 39. The gripping portion 85 is in the extension of the rod 41. The spacing between the axis 89 and the section 71 is such that the shutter 39 is pressed against the sealing surface, against the restoring force of the spring 27.
La seconde position stable est illustrée sur la figure 5. Dans cette position, le premier tronçon 69 de la surface de came est plaqué contre la surface d'appui 87. L'écartement entre l'axe 89 et le tronçon 69 est inférieur à l'écartement entre l'axe 89 et le tronçon 71 . L'axe 89 est situé à l'extrémité des trous oblongs 91 opposée à l'obturateur 39. L'obturateur 39 n'est pas plaqué contre la portée d'étanchéité.  The second stable position is illustrated in FIG. 5. In this position, the first section 69 of the cam surface is pressed against the bearing surface 87. The distance between the axis 89 and the section 69 is less than distance between the axis 89 and the section 71. The axis 89 is located at the end of the oblong holes 91 opposite the shutter 39. The shutter 39 is not pressed against the sealing surface.
Dans cette position, la partie de préhension 85 est sensiblement perpendiculaire à la tige 41 .  In this position, the grip portion 85 is substantially perpendicular to the rod 41.
II est à noter que la vanne d'isolement 1 comporte un organe de blocage 93 du levier dans la seconde position stable. Cet organe est ici une pince rigidement fixée au corps creux 15. La partie de préhension 85 du levier vient s'encliqueter avec la pince 93, de manière amovible, dans la seconde position stable. It should be noted that the isolation valve 1 comprises a locking member 93 of the lever in the second stable position. This body is here a clamp rigidly attached to the hollow body 15. The gripping portion 85 of the lever is snap-fastened with the clip 93 removably in the second stable position.
Dans la seconde position stable, la soupape 25 est susceptible de coulisser de sa position de dégagement à sa position d'obturation. Ceci a pour effet de provoquer un coulissement des trous oblongs 91 par rapport à l'axe 89.  In the second stable position, the valve 25 is slidable from its disengaged position to its closed position. This has the effect of causing sliding of the oblong holes 91 with respect to the axis 89.
Dans un exemple de réalisation, la partie de came 83 comporte deux flasques placées en vis-à-vis l'une de l'autre, l'axe 89 s'étendant d'une flasque à l'autre. Dans un autre exemple de réalisation, la tige 41 comporte deux flasques en vis-à-vis, chaque flasque comportant un trou oblong. La partie de came 83 est engagée entre les deux flasques et porte deux ergots 89 pointant en sens opposés vers les flasques, et engagés dans les trous oblongs. Les ergots définissent l'axe 89.  In an exemplary embodiment, the cam portion 83 has two flanges placed opposite each other, the axis 89 extending from one flange to the other. In another embodiment, the rod 41 comprises two flanges vis-à-vis, each flange having an oblong hole. The cam portion 83 is engaged between the two flanges and carries two lugs 89 pointing in opposite directions towards the flanges, and engaged in the oblong holes. The lugs define the axis 89.

Claims

REVENDICATIONS
1 . - Vanne d'isolement (1 ) de fermeture d'un accumulateur hydraulique (3), la vanne (1 ) comprenant : 1. - Isolation valve (1) for closing a hydraulic accumulator (3), the valve (1) comprising:
- un corps creux (15) comportant un conduit (17) de passage pour un fluide ayant une entrée (19) et une sortie (21 ), l'entrée (19) étant prévue pour être raccordée à un orifice (23) de l'accumulateur hydraulique (3); a hollow body (15) comprising a passage (17) for a fluid having an inlet (19) and an outlet (21), the inlet (19) being designed to be connected to an orifice (23) of the hydraulic accumulator (3);
- une soupape (25) mobile par rapport au corps creux (15) entre une position d'obturation de l'entrée (19) et une position de dégagement de l'entrée (19);  - a valve (25) movable relative to the hollow body (15) between a closed position of the inlet (19) and a position of disengagement of the inlet (19);
- un organe élastique (27) rappelant la soupape (25) vers sa position de dégagement ; caractérisée en ce que la vanne (1 ) comprend un organe de commande (29) lié à la soupape (25), mobile sélectivement par rapport au corps creux (15) entre une première position stable dans laquelle l'organe de commande (29) bloque la soupape (25) en position d'obturation, et une seconde position stable dans laquelle la soupape (25) est libre de débattre entre sa position d'obturation et sa position de dégagement. an elastic member (27) reminding the valve (25) towards its release position; characterized in that the valve (1) comprises a control member (29) connected to the valve (25), movable selectively relative to the hollow body (15) between a first stable position in which the control member (29) blocks the valve (25) in the closed position, and a second stable position in which the valve (25) is free to debate between its closed position and its disengaged position.
2. - Vanne selon la revendication 1 , caractérisée en ce que l'organe de commande (29) présente une surface de came (62) agencée pour que, quand l'organe de commande (29) est placé à une position intermédiaire entre ses première et seconde positions stables, l'organe élastique (27) déplace l'organe de commande (29) jusqu'à la seconde position stable.  2. - valve according to claim 1, characterized in that the control member (29) has a cam surface (62) arranged so that when the control member (29) is placed at an intermediate position between its first and second stable positions, the elastic member (27) moves the control member (29) to the second stable position.
3. - Vanne selon la revendication 2, caractérisée en ce que la soupape (25) comporte un obturateur (39) et une tige (41 ) liée à l'obturateur (39) et coopérant avec l'organe de commande (29).  3. - Valve according to claim 2, characterized in that the valve (25) comprises a shutter (39) and a rod (41) connected to the shutter (39) and cooperating with the control member (29).
4. - Vanne selon l'une quelconque des revendications 2 ou 3, caractérisée en ce que la surface de came (62) comporte des premier et second tronçons (69,71 ) sensiblement perpendiculaire l'un à l'autre, raccordés par un coude (73) ayant un faible rayon de courbure.  4. - valve according to any one of claims 2 or 3, characterized in that the cam surface (62) comprises first and second sections (69,71) substantially perpendicular to each other, connected by a elbow (73) having a small radius of curvature.
5. - Vanne selon l'une quelconque des revendications 2 à 4, caractérisée en ce que l'organe de commande (29) est un boisseau rotatif engagé dans le corps creux (15), ayant un axe de rotation (X) sensiblement perpendiculaire à une direction (Y) de déplacement de la soupape (25) entre ses positions d'obturation et de dégagement.  5. - valve according to any one of claims 2 to 4, characterized in that the control member (29) is a rotary plug engaged in the hollow body (15), having a substantially perpendicular axis of rotation (X) a direction (Y) of movement of the valve (25) between its closed and disengaged positions.
6. - Vanne selon la revendication 5, caractérisée en ce que le boisseau (29) est creux, la surface de came (62) étant ménagé sur une surface radialement interne du boisseau (29), la soupape (25) comportant un suiveur de came (67) coopérant avec la surface de came (62). 6. - valve according to claim 5, characterized in that the plug (29) is hollow, the cam surface (62) being formed on a radially inner surface of the plug (29), the valve (25) having a follower cam (67) cooperating with the cam surface (62).
7. - Vanne selon l'une quelconque des revendications 2 à 4, caractérisée en ce que l'organe de commande (29) est un levier glissant contre le corps creux (15) par l'intermédiaire de la surface de came (62). 7. - valve according to any one of claims 2 to 4, characterized in that the control member (29) is a lever sliding against the hollow body (15) via the cam surface (62) .
8. - Vanne selon la revendication 7, caractérisée en ce qu'une tige (41 ) de la soupape (25) comporte au moins un trou oblong (91 ) allongé parallèlement à la tige (41 ), le levier comportant au moins un axe (89) engagé dans le trou oblong (91 ).  8. - valve according to claim 7, characterized in that a rod (41) of the valve (25) comprises at least one elongate hole (91) elongate parallel to the rod (41), the lever having at least one axis (89) engaged in the oblong hole (91).
9. - Vanne selon la revendication 7 ou 8, caractérisée en ce qu'elle comporte un organe de blocage (93) du levier dans la seconde position stable.  9. - Valve according to claim 7 or 8, characterized in that it comprises a locking member (93) of the lever in the second stable position.
10. - Ensemble comportant un accumulateur hydraulique (3) et une vanne (1 ) d'isolement dudit accumulateur hydraulique (3) selon l'une quelconque des revendications précédentes, l'accumulateur hydraulique (3) comportant une enceinte rigide (5) et une enveloppe expansible (7) logée dans l'enceinte rigide (5), la soupape (25) en position de dégagement faisant saillie à l'intérieur de l'enceinte rigide(5) à travers l'orifice (23) pour empêcher l'enveloppe expansible (7) de pénétrer dans l'entrée (19).  10. - Set comprising a hydraulic accumulator (3) and a valve (1) for isolating said hydraulic accumulator (3) according to any one of the preceding claims, the hydraulic accumulator (3) comprising a rigid enclosure (5) and an expandable envelope (7) housed in the rigid enclosure (5), the valve (25) in the disengaged position protruding inside the rigid enclosure (5) through the orifice (23) to prevent the expanding envelope (7) to enter the inlet (19).
1 1 .- Procédé de montage à bord d'un véhicule d'un accumulateur hydraulique (3) équipé d'une vanne (1 ) selon l'une quelconque des revendications 1 à 9, le procédé comprenant les étapes suivantes :  1 1 .- A method for mounting a vehicle on a hydraulic accumulator (3) equipped with a valve (1) according to any one of claims 1 to 9, the method comprising the following steps:
- placer l'organe de commande (29) dans sa seconde position stable ;  placing the control member (29) in its second stable position;
- remplir l'accumulateur hydraulique (3)avec un fluide, à travers le conduit de passage (17);  - filling the hydraulic accumulator (3) with a fluid, through the passage conduit (17);
- placer l'organe de commande (29) dans sa première position stable ;  placing the control member (29) in its first stable position;
- monter l'accumulateur hydraulique (3) à bord du véhicule et raccorder la sortie (21 ) du conduit de passage (17) à un circuit de fluide du véhicule ;  - Mount the hydraulic accumulator (3) on board the vehicle and connect the outlet (21) of the passage duct (17) to a fluid circuit of the vehicle;
- placer l'organe de commande (29) dans sa seconde position stable.  - place the control member (29) in its second stable position.
PCT/EP2014/076779 2013-12-06 2014-12-05 Shut-off valve of a hydraulic accumulator, assembly provided with such a valve, corresponding installation method WO2015082707A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014005533.6T DE112014005533T5 (en) 2013-12-06 2014-12-05 Shut-off valve for a hydraulic accumulator, arrangement provided with such a valve, corresponding mounting method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1362270A FR3014523B1 (en) 2013-12-06 2013-12-06 ISOLATION VALVE OF A HYDRAULIC ACCUMULATOR, ASSEMBLY EQUIPPED WITH SUCH VALVE, CORRESPONDING MOUNTING METHOD
FR1362270 2013-12-06

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Publication Number Publication Date
WO2015082707A1 true WO2015082707A1 (en) 2015-06-11

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298183A (en) * 1979-03-13 1981-11-03 Mizue Kawakami Water tap
US4332495A (en) * 1980-04-29 1982-06-01 Europatent S.A. Wooden frames or the like having two frame parts adapted to be connected by a clamping-eccentric connector
GB2188399A (en) * 1986-03-24 1987-09-30 Agrupada Invest Off Valve for coffee makers
WO2003027510A2 (en) * 2001-09-26 2003-04-03 Agostino Ferrari S.P.A. Device and method for detachably connecting abutting structural parts and tie member for use to form said device
DE102004007114A1 (en) * 2004-02-13 2005-08-25 Rheinauer Maschinen & Armaturenbau Faulhaber Und Truttenbach Kg Worm gear, has lines of balls extending along teeth on either side of groove in worm or worm wheel
JP2007314220A (en) * 2006-05-26 2007-12-06 Yoshinobu Toyomura Dispensing cock for drink
DE102011103518A1 (en) * 2011-06-07 2012-12-13 Mtu Friedrichshafen Gmbh Blow-off valve for turbine of exhaust gas turbocharger mounted in internal combustion engine, has cam gear which converts rotational movement of drive element to translational movement of valve plate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298183A (en) * 1979-03-13 1981-11-03 Mizue Kawakami Water tap
US4332495A (en) * 1980-04-29 1982-06-01 Europatent S.A. Wooden frames or the like having two frame parts adapted to be connected by a clamping-eccentric connector
GB2188399A (en) * 1986-03-24 1987-09-30 Agrupada Invest Off Valve for coffee makers
WO2003027510A2 (en) * 2001-09-26 2003-04-03 Agostino Ferrari S.P.A. Device and method for detachably connecting abutting structural parts and tie member for use to form said device
DE102004007114A1 (en) * 2004-02-13 2005-08-25 Rheinauer Maschinen & Armaturenbau Faulhaber Und Truttenbach Kg Worm gear, has lines of balls extending along teeth on either side of groove in worm or worm wheel
JP2007314220A (en) * 2006-05-26 2007-12-06 Yoshinobu Toyomura Dispensing cock for drink
DE102011103518A1 (en) * 2011-06-07 2012-12-13 Mtu Friedrichshafen Gmbh Blow-off valve for turbine of exhaust gas turbocharger mounted in internal combustion engine, has cam gear which converts rotational movement of drive element to translational movement of valve plate

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DE112014005533T5 (en) 2016-08-18
FR3014523B1 (en) 2016-11-04
FR3014523A1 (en) 2015-06-12

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