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EP2501905B1 - Dispositif commutable pour l'alimentation en pression - Google Patents

Dispositif commutable pour l'alimentation en pression Download PDF

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Publication number
EP2501905B1
EP2501905B1 EP10779801.9A EP10779801A EP2501905B1 EP 2501905 B1 EP2501905 B1 EP 2501905B1 EP 10779801 A EP10779801 A EP 10779801A EP 2501905 B1 EP2501905 B1 EP 2501905B1
Authority
EP
European Patent Office
Prior art keywords
pressure
switching
supply device
pressure supply
balls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10779801.9A
Other languages
German (de)
English (en)
Other versions
EP2501905A2 (fr
Inventor
Mathias Boegershausen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2501905A2 publication Critical patent/EP2501905A2/fr
Application granted granted Critical
Publication of EP2501905B1 publication Critical patent/EP2501905B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0475—Hollow camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34446—Fluid accumulators for the feeding circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons

Definitions

  • the invention is in the technical field of internal combustion engines and relates to a switchable device for supplying pressure to at least one consumer of an internal combustion engine.
  • German patent application DE 102007056684 A1 the applicant shows a pressure accumulator with its own housing.
  • German Offenlegungsschrift describes DE 10228354 A1 a built-in an internal cavity of a camshaft pressure accumulator, which space can be saved in the internal combustion engine.
  • the object of the present invention is to further develop conventional pressure accumulator for supplying pressure to consumers in an internal combustion engine in an advantageous manner.
  • a switchable device for supplying pressure (switchable pressure accumulator) to at least one consumer of an internal combustion engine.
  • the consumer may in particular be a hydraulic camshaft adjuster for adjusting the phase angle between crankshaft and camshaft.
  • the device is used for example in an electro-hydraulic valve actuating device of the internal combustion engine.
  • the pressure supply device comprises a housing with a cavity.
  • the cavity may, for example, be an internal cavity of a camshaft so that the camshaft forms the housing of the switchable device.
  • a different from the hollow camshaft housing may be provided with a cavity, which is then inserted into an inner cavity of the camshaft.
  • the device for pressure supply further comprises a housing arranged in the cavity displacement element which is displaceable between a first end position and a second end position.
  • the displacement element has a pressure surface which, together with a wall of the housing cavity, at least partially delimits a reservoir which can be connected or connected to the load in a fluid-conducting manner.
  • the storage space can be fluid-conductively connected or connected to a pressure or pressure medium source.
  • the storage space is connected to the lubricating oil circuit of the internal combustion engine, wherein an oil pump serves as a pressure source and oil of the lubricating oil circuit is used as a pressure medium.
  • the displacement element can, for example be formed in the form of a piston with a frontal pressure surface.
  • the device according to the invention further comprises a force accumulator which cooperates with the displacement element so that the displacement element can be displaced from the first end position into the second end position by pressurizing the reservoir against the force of the force accumulator.
  • the energy accumulator is designed for example as a spring element, in particular in the form of a compression spring, wherein any other suitable spring type can be used.
  • the device according to the invention further comprises a locking mechanism, by means of which the displacement element can be releasably locked in the second end position in which the force accumulator is tensioned. In a different position of the displacement element from the second end position, in particular in the first end position, the displacement element can not be locked by the locking mechanism.
  • the device according to the invention comprises an actuated by an actuator switching mechanism with a switching element, which can be brought into at least two switching positions, wherein the switching element cooperates with the locking mechanism, that the displacement element in a first switching position of the switching element from both an unlocked state locked can also be unlocked from a locked state and in a second switching position of the switching element in the unlocked state neither locked nor unlocked in the locked state.
  • the inventive device allows for a comparatively small space requirement, a reliable and secure pressure supply to consumers of an internal combustion engine, which is independent of the pressure in the lubrication circuit of the internal combustion engine available.
  • this comprises a rigidly connected to the housing ball carrier element with a carrier cavity in which the switching element is at least partially accommodated.
  • the ball carrier element has a plurality of openings, in each of which a ball is received radially movable.
  • the balls are applied to an outer circumferential surface formed by the switching element.
  • the device further comprises a locking element rigidly connected to the displacement element, which is provided with a locking portion, which can reach the second end position of the displacement element in engagement with the balls, for example by this engages behind, thereby the displacement element on the housing to lock.
  • the locking element can not engage with the balls, so that the displacement element is not locked.
  • the device further comprises a return element is provided, which is arranged so that the switching element is displaceable relative to the force of the return element by the actuator from the first switching position to the second switching position relative to the ball carrier element.
  • the first return element is formed, for example, as a spring element, in particular in the form of a compression spring, wherein any other suitable spring type can be used.
  • the outer circumferential surface of the switching element is provided with at least one recess associated with the balls, which is formed and arranged so that the balls can be at least partially received in the recess in the second switching position of the switching element, so that the locking portion disengaged arrives with the balls and the locking of the displacement element is released.
  • the balls are not received by the recess of the support surface in the first switching position of the switching element, so that the locking of the displacement element is maintained.
  • a rigidly connected to the ball carrier element fuse element is arranged, which forms a stop for a radially outwardly directed movement of the balls, such that the balls are taken secured against loss in the openings.
  • the securing element this is cup-shaped and applied from one side to the ball carrier element.
  • the securing element and the ball carrier element can be rigidly connected to each other, for example by pressing.
  • the latter is provided with a closing element closing off the cavity to the outside, on which the force accumulator of the displacement element is supported.
  • the closure element can serve in particular for securing the position of the force accumulator.
  • the ball carrier element is rigidly connected to the closure element.
  • the closure element is provided with a passage opening in which a cooperating with the switching element, actuated by the actuator switch body is received displaceably.
  • the storage space can be fluidly connected or connected to the pressure source and possibly the consumer with the interposition of at least one outlet safety device.
  • the leakage protection is designed so that it allows the flow of pressurized pressure medium, whereas it blocks the flow of non-pressurized, only the hydrostatic pressure underlying the pressure medium.
  • the leakage protection can serve as a limitation of the storage space and can in particular form a stop for the displacement element in the first end position.
  • the structure of such leakage protection is known in the art and in the patent literature, for example in the DE 19615076 described.
  • the pressure source via a blocking in the direction of the pressure source check valve with the reservoir space fluidly connected or connected.
  • the invention further extends to an internal combustion engine which is equipped with at least one switchable device as described above for supplying pressure to at least one consumer.
  • Fig. 1 and Fig. 2 considered, wherein an embodiment of the inventive device for supplying pressure to consumers of an internal combustion engine, and the connection of the device to the lubricating oil circuit of an internal combustion engine are illustrated.
  • the device generally designated by the reference numeral 1 can be inserted into a camshaft cavity 5 of a hollow camshaft 6.
  • the camshaft 6 constructed here, for example, which is provided on its outer peripheral surface with a plurality of cams 25, can be rotated about a central axis of rotation 7. Equally, however, it would also be conceivable that the camshaft 6 is produced by forging.
  • the device 1 for supplying pressure to consumers of an internal combustion engine comprises a hollow cylindrical housing 2 ("cartridge"), which is formed in a manner adapted to the camshaft cavity 5, so that the device 1 can be easily integrated into the camshaft 6 by the housing 2 in the camshaft cavity 5 is introduced and firmly connected to the camshaft 6.
  • the housing 2 forms a housing cavity 3, in which a displacement element designed in the form of a piston 4 is received in an axially displaceable manner.
  • a stepped cylinder closure body 7 is pressed, which extends from one end of the housing 2 ago in the housing cavity 3 inside. It may be divided into a larger diameter terminal first section 8 and an adjoining second smaller diameter section 9, thereby forming an annular step 10.
  • a force accumulator serving as energy storage spring (helical compression spring) 11 with its one end, which abuts the piston 4 with its other end.
  • the firmly connected to the housing 2 closure body 7 is provided with a central axial bore 12 in which a shift rod 13 is received axially displaceable.
  • the shift rod 13 can be actuated by an electromagnetic actuator 14, for which purpose a non-illustrated plunger engages a front-side abutment surface of the shift rod 13.
  • the shift rod 12 is part of a switching mechanism for locking and releasing a locking mechanism for the piston 4, which will be explained in more detail below.
  • the piston 4 has an end-face pressure surface 15 which, together with a housing cavity wall 16 of the housing cavity 3, at least partially delimits a reservoir 17 for pressurized oil.
  • a hydraulic camshaft adjuster 18 is fastened, for example by means of a (not shown) central screw on the end face of the camshaft 6.
  • the hydraulic camshaft adjuster 18 comprises a driven part which is drivingly connected to the crankshaft and a camshaft-fixed driven part, as well as a hydraulic actuator connected between driving and driven part, which transmits the torque from the to the driven part and an adjustment and fixation of the Rotary position between these allows.
  • the hydraulic actuator is provided with at least one oppositely acting pressure chamber pair, which is specifically acted upon by pressure oil, to bring about a change in the rotational position between the input and output part by generating a pressure gradient across the two pressure chambers.
  • Hydraulic camshaft adjusters as such are well known to those skilled in the art and for example in the documents DE 202005008264 U1 . EP 1596040 A2 . DE 102005013141 A1 . DE 19908934 A1 and WO 2006/039966 The applicant described in detail, so that it need not be discussed in more detail here.
  • the hydraulic camshaft adjuster 18 and the reservoir 17 are fluidly connected via a pressure line 19 with a formed in the form of an oil pump 20 pressure or pressure medium source.
  • the pressure line 19 is connected to opening into the camshaft cavity 5 radial openings 26 of the camshaft 6.
  • a not-shown control valve for controlling the oil flows is arranged, through which the Druckkammem the camshaft adjuster 18 can be fluidly connected to the oil pump 20 or with the oil tank 21.
  • Such control valves are well known in the art as such and for example in the German patent DE 19727180 C2 , the German patent DE 19616973 C2 , the European patent application EP 1 596 041 A2 and the German Offenlegungsschrift DE 102 39 207 A1 The applicant described in detail, so that it need not be discussed in more detail here.
  • the storage space 17 communicates with the hydraulic camshaft adjuster 18 or its control valve.
  • other consumers are connected to the lubricating oil circuit, such as support members 23 and bearings 24 of the camshaft 6, which must be supplied with pressure oil.
  • a leakage protection for limiting the storage space 17 may be provided, which may serve in particular as a stop for the piston 4.
  • the piston 4 can be displaced axially by pressurizing the storage space 17 against the spring force of the energy storage spring 11 by pressure oil from the oil pump 20 via the pressure line 19 in the storage space 17 is promoted. In this case, the piston 4 is moved from a first end position to a second end position, in which the energy storage spring 11 is stretched or more tensioned in the presence of a bias voltage. About not shown ring seals the reservoir 17 is closed to the outside oil-tight.
  • the locking mechanism comprises a sleeve-shaped ball carrier 31, which is pressed into a cup-shaped end section 27 of the closure body 7 and has a plurality of radial bores 29 distributed in the circumferential direction, in each of which a ball 30 is accommodated.
  • the holes 29 each have a larger diameter than the balls 30, so that they are radially freely movable in the holes 29.
  • the ball carrier 28 is rigidly connected to the closure body 7.
  • a cup-shaped fuse body 31 consisting of a bottom wall 33 and a hollow cylindrical sleeve member 32, pressed.
  • the sleeve part 32 of the securing body 31 is dimensioned such that it partially covers the radial bores 29 with a certain projection, so that only a certain radially outward movement of the balls 30 is made possible. Beyond that, radially outwardly directed movement of the balls 30 is blocked by the sleeve part 32, so that the balls 30 each remain received in the bores 29.
  • switching pin 35 is received axially displaceable.
  • the switching pin 35 has a first end face 36, which is coupled to a front end of the shift rod 35.
  • a return spring 39 is further included, with one end to one of the first end face 37 opposite the second end face 37 of the switch pin 35 and with its other end to an inner surface 38 of Bottom wall 33 of the fuse body 31 is supported.
  • the return spring 39 is formed here, for example, as a helical compression spring, but may also be of any other suitable spring type. The shift pin 35 can thus be moved axially by moving the shift rod 13 by the plunger of the actuator 14 against the spring force of the return spring 39.
  • the plunger acts on the front-side abutment surface of the shift rod 13, wherein the plunger is rigidly secured to a magnet armature of an electromagnet of the actuator 14 and can be moved axially by energizing the magnet armature. If the magnet armature is not energized, the switching pin 35 is reset by the spring force of the return spring 39.
  • An outer circumferential surface 40 of the switching pin 35 is provided with a circumferential annular groove 41, which is assigned to the balls 30 and formed in a fit to the balls 30.
  • the switching pin 35 can be moved back and forth between two end positions by the counteracting forces of actuator 14 and return spring 39. In a first end position without energization of the actuator 14, the balls 30 are outside the annular groove 41. In a second end position with energized actuator 14, the balls 30 can dip into the annular groove 41. Always the balls 30 of the outer circumferential surface 40 of the switch pin 35, so that they are taken in connection with the fuse body 31 secured against loss in their holes 29.
  • a locking body 42 is pressed on the piston 4, a locking body 42 is pressed.
  • the locking body 42 is provided for this purpose with an applied to the cup-shaped piston 4 hollow cylindrical sleeve portion 43 to which a locking portion 44 connects.
  • the sleeve portion 43 serves for axial guidance of the piston 4 within the housing cavity 3.
  • the locking portion 44 tapers stepwise in the direction of the actuator 14 back.
  • a first step 45 tapering towards the actuator 14 forms an annular support surface 47 for the energy storage spring 11.
  • An adjoining, second step 46 tapering towards the actuator 14 forms an annular seating surface 48 for the balls 30.
  • One to the second Level 46 molded Collar 52 which widens radially with respect to the second step 46, forms a contact surface 49 for the balls 30.
  • the shift rod 13 is moved against the force of the return spring 39 by the plunger acting on the face-side abutment surface.
  • the shift pin 35 is brought by the shift rod 13 into a position in which annular groove 41 is radially inwardly of the holes 29 and balls 30, so that the balls 30 can dip into the annular groove 41.
  • the balls 30, urged by the locking portion 44 are pressed into the annular groove 41.
  • the depth of the annular groove 41 is dimensioned such that the piston 4 or the locking portion 44 rigidly connected to the piston 4 can be displaced even further against the spring force of the energy storage spring 11.
  • the balls 30 are completely received within the holes 29 and close at least approximately flush with an outer circumferential surface of the ball carrier 28 from. This situation is in Fig. 3B shown.
  • Second end position An end position (referred to in the introduction as "second end position") of the piston 4 is defined, in which the storage space 17 is filled to the maximum with pressure oil. If the actuator 14 is no longer actuated, that is, the energization of the electromagnet is terminated, the shift pin 35 is axially displaced by the spring force of the return spring 39 relative to the ball carrier 28, wherein the balls 30 are pressed from the annular groove 41 against the seat surface 48 of the locking portion 44 , In this position, the locking portion 43 engages behind the balls 30, so that the piston 4 is axially fixed. This situation is in Fig. 3C shown.
  • the piston 4 can thus be locked against the spring force of the return spring 39 from the first switching position to the second switching position in its second end position only by pressing the plunger to move the switching pin 35. Without displacement of the switching pin 35 in the second switching position, the piston 4 can not be locked.
  • the piston 4 can thus be unlocked by pressing the plunger to move the switch pin 35 against the spring force of the return spring 39 from the first switching position to the second switching position. Without displacement of the switching pin 35 in the second switching position, the piston 4 can not be unlocked.
  • the device according to the invention can thus be biased by a separate housing in a cavity of the camshaft piston by the pressure of the oil pump with the engine running against the energy storage spring up to a specified stroke.
  • the piston engages by a short energizing the radially decoupled actuator, which is mounted outside the camshaft, in a holding mechanism (ball lock).
  • a holding mechanism ball lock
  • the oil pressure in the oil galleries falls to ambient pressure, as does the pressure in the pressure accumulator.
  • the energy remains stored in the energy storage spring.
  • An optional leakage protection means that the "pressure-free" lubricating oil can not run back from the storage room into the oil galleries or via the camshaft bearing points into the cylinder head.
  • a lamellar labyrinth leakage protection for example, a lamellar labyrinth leakage protection, consisting of three sheets, each with a bore in the axial direction on the outer diameter. The sheets are rotated by 120 ° to each other.
  • the pressure accumulator has no pressure loss due to leaks. Elaborate high pressure seals omitted. As a result, the system friction is reduced and stored more usable energy in the energy storage spring.
  • the locking mechanism of the piston can be released.
  • the prestressed energy storage spring For example, the oil from the reservoir is forced back into the oil circuit of the cylinder head and the phaser, provided that the supply oil pressure in the oil galleries is less than the pressure achievable with the accumulator (spring element force multiplied by piston pressure area).
  • a non-return valve in the direction of the oil pump is provided between the oil pump and the consumers, which are to be acted upon by oil pressure from the pressure accumulator.
  • the piston is guided axially in the housing and is supported by a spring element (eg tension or compression spring) on the closure body, which is pressed into the housing.
  • a spring element eg tension or compression spring
  • This has, for example, eight radial bores, in each of which a ball is guided.
  • the shift rod is coupled to the shift pin and mounted axially displaceable in the closure body.
  • the actuator is screwed, for example, in the cylinder head and presses in the energized state on the shift rod against the return spring of the switch pin.
  • the fuse body serves as a captive for the balls.
  • the arrangement in the cavity of the camshaft results in a space advantage over externally arranged camshaft pressure accumulators.
  • the device according to the invention enables a reliable pressure supply to consumers of an internal combustion engine, wherein pressure oil is independent of the engine oil supply (lubricating oil circuit) of the internal combustion engine available through the integrated pressure accumulator in the camshaft.
  • pressure oil is independent of the engine oil supply (lubricating oil circuit) of the internal combustion engine available through the integrated pressure accumulator in the camshaft.
  • consumers can be supplied with pressurized oil even if the engine-side oil supply is insufficient, for example, at engine start and very hot pressure oil in conjunction with a low flow rate of the oil pump (hot idle).
  • an adjustment of the camshaft adjuster in basic position (late, middle, early position) take place, which is particularly suitable in connection with Start / stop systems is.
  • the adjustment speed of the camshaft adjuster can be improved, in particular when the internal combustion engine is idling.
  • the device according to the invention can be realized by relatively few components, which can be saved in industrial mass production assembly and material costs.
  • a particular advantage of the device results from the fact that the piston can be locked or unlocked by briefly energizing the actuator (current pulses). A permanent energization of the actuator in the locked or unlocked state of the piston is not required. This allows a particularly energy-saving operation of the device for pressure supply.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Valve Device For Special Equipments (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Claims (15)

  1. Dispositif commutable (1) pour l'alimentation en pression d'au moins un consommateur d'un moteur à combustion interne, qui comprend :
    un boîtier (2) avec une cavité de boîtier (3),
    un élément de déplacement (4) disposé dans la cavité de boîtier (3), qui peut être déplacé entre une première position d'extrémité et une deuxième position d'extrémité, l'élément de déplacement (4) étant muni d'une surface de pression (15) qui,
    conjointement avec une paroi de cavité de boîtier (16), limite au moins en partie un espace de stockage (17) pouvant être connecté fluidiquement au consommateur, l'espace de stockage (17) pouvant être connecté fluidiquement à une source de pression (20),
    un accumulateur de force (11) coopérant avec l'élément de déplacement (4), l'élément de déplacement (4), par sollicitation par pression de l'espace de stockage (17) à l'encontre de la force de l'accumulateur de force (11), pouvant être déplacé de la première position d'extrémité dans la deuxième position d'extrémité,
    un mécanisme de verrouillage, par le biais duquel l'élément de déplacement (4) peut être verrouillé dans la deuxième position d'extrémité,
    un mécanisme de commutation pouvant être actionné par un actionneur (14), comprenant un élément de commutation (35) pouvant être amené dans au moins deux positions de commutation, lequel coopère avec le mécanisme de verrouillage de telle sorte que l'élément de déplacement (4) puisse être verrouillé ou déverrouillé dans une première position de commutation de l'élément de commutation (35) et, dans une deuxième position de commutation de l'élément de commutation (35), ne puisse pas être verrouillé ou déverrouillé.
  2. Dispositif (1) pour l'alimentation en pression selon la revendication 1, caractérisé par :
    un élément de support de billes (28) connecté rigidement au boîtier (2) comprenant une cavité de support (34) dans laquelle l'élément de commutation (35) est reçu au moins en partie,
    l'élément de support de billes (28) présentant une pluralité d'ouvertures (29) dans lesquelles est à chaque fois reçue une bille (30) de manière mobile radialement, les billes (30) s'appliquant contre une surface d'enveloppe extérieure (40) formée par l'élément de commutation (35),
    un élément de verrouillage (42) connecté à l'élément de déplacement (4), lequel est pourvu d'une portion de verrouillage (44) qui, pour verrouiller l'élément de déplacement (4) dans sa deuxième position d'extrémité, peut parvenir en engagement avec les billes (30),
    l'élément de commutation (35) pouvant être déplacé à l'encontre de la force d'un élément de rappel (39) par l'actionneur (14) de la première position de commutation dans la deuxième position de commutation par rapport à l'élément de support de billes (28), et
    la surface d'enveloppe extérieure (40) de l'élément de commutation (35) étant pourvue d'au moins un évidement (41), de telle sorte que les billes (30) puissent être reçues dans la deuxième position de commutation au moins en partie par l'évidement (41), de telle sorte que la portion de verrouillage (44) parvienne hors d'engagement avec les billes (30).
  3. Dispositif (1) pour l'alimentation en pression selon la revendication 2, caractérisé par un élément de fermeture (7) connecté rigidement au boîtier (2), au niveau duquel s'appuie l'accumulateur de force (11) de l'élément de déplacement (4).
  4. Dispositif (1) pour l'alimentation en pression selon la revendication 3, caractérisé en ce que l'élément de support de billes (28) est connecté rigidement à l'élément de fermeture (7).
  5. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 3 à 4, caractérisé en ce que l'élément de fermeture (7) est pourvu d'une ouverture de passage (12) dans laquelle un corps de commutation (13) pouvant être actionné par l'actionneur (14), coopérant avec l'élément de commutation (35), est reçu de manière déplaçable.
  6. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 2 à 5, caractérisé par un élément de fixation (31) connecté rigidement à l'élément de support de billes (28), lequel forme une butée pour un déplacement des billes (30) orienté radialement vers l'extérieur, de telle sorte que les billes (30) soient reçues de manière imperdable dans les ouvertures (29).
  7. Dispositif (1) pour l'alimentation en pression selon la revendication 6, caractérisé en ce que l'élément de fixation (31) est réalisé en forme de pot et est monté sur l'élément de support de billes (28) depuis un côté.
  8. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'accumulateur de force est réalisé sous forme d'élément de ressort (11).
  9. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 1 à 8, caractérisé par un boîtier (2) pouvant être inséré dans une cavité (5) d'un arbre à cames (6).
  10. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le boîtier (2) est formé par un arbre à cames (6) et la cavité de boîtier (3) est formée par une cavité (5) de l'arbre à cames (6).
  11. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 1 à 10, caractérisé en ce que l'espace de stockage (17) peut être connecté fluidiquement à la source de pression (20) par le biais d'une protection contre les fuites pour fluide sous pression permettant le passage dans le cas d'une sollicitation par pression et empêchant le passage en l'absence de sollicitation par pression.
  12. Dispositif (1) pour l'alimentation en pression selon la revendication 11, caractérisé en ce que la protection contre les fuites sert de limitation pour l'espace de stockage (17).
  13. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la source de pression (20) peut être connectée fluidiquement à l'espace de stockage (17) par le biais d'au moins un clapet anti-retour (22) bloquant le passage dans la direction de la source de pression.
  14. Dispositif (1) pour l'alimentation en pression selon l'une quelconque des revendications 1 à 13, caractérisé en ce que de l'huile provenant du circuit d'huile de lubrification est utilisée en tant que fluide sous pression.
  15. Moteur à combustion interne, comprenant au moins un dispositif commutable (1) pour l'alimentation en pression d'un consommateur selon l'une quelconque des revendications 1 à 14.
EP10779801.9A 2009-11-20 2010-11-17 Dispositif commutable pour l'alimentation en pression Not-in-force EP2501905B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009054055A DE102009054055A1 (de) 2009-11-20 2009-11-20 Schaltbare Vorrichtung zur Druckversorgung
PCT/EP2010/067658 WO2011061217A2 (fr) 2009-11-20 2010-11-17 Dispositif commutable pour l'alimentation en pression

Publications (2)

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EP2501905A2 EP2501905A2 (fr) 2012-09-26
EP2501905B1 true EP2501905B1 (fr) 2014-09-17

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US (1) US8813709B2 (fr)
EP (1) EP2501905B1 (fr)
CN (1) CN102667073B (fr)
DE (1) DE102009054055A1 (fr)
WO (1) WO2011061217A2 (fr)

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DE102011114894B4 (de) * 2010-10-08 2013-05-16 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Druckspeicheranordnung
DE102010063390A1 (de) 2010-12-17 2012-06-21 Schaeffler Technologies Gmbh & Co. Kg Druckspeichereinheit für eine Nockenwelle sowie Nockenwelle mit einer Druckspeichereinheit
DE102012210795B3 (de) * 2012-06-26 2013-09-19 Schaeffler Technologies AG & Co. KG Druckspeicher
DE102013111617B4 (de) 2013-10-22 2021-12-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem solchen Umschaltventil
DE102013111616B4 (de) 2013-10-22 2021-12-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem solchen Umschaltventil
DE102014226150A1 (de) * 2014-12-17 2016-06-23 Zf Friedrichshafen Ag Hydrauliksystem für ein Automatikgetriebe
JP2019529792A (ja) * 2016-09-09 2019-10-17 ジェイピー スコープ インコーポレイテッド 内燃機関の可変変位弁装置

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Publication number Publication date
EP2501905A2 (fr) 2012-09-26
WO2011061217A2 (fr) 2011-05-26
US20120304953A1 (en) 2012-12-06
CN102667073B (zh) 2015-05-06
WO2011061217A3 (fr) 2011-07-21
US8813709B2 (en) 2014-08-26
CN102667073A (zh) 2012-09-12
DE102009054055A1 (de) 2011-05-26

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