EP1048849B1 - Flüssigkeitshochdruckpumpe - Google Patents

Flüssigkeitshochdruckpumpe Download PDF

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Publication number
EP1048849B1
EP1048849B1 EP00202790A EP00202790A EP1048849B1 EP 1048849 B1 EP1048849 B1 EP 1048849B1 EP 00202790 A EP00202790 A EP 00202790A EP 00202790 A EP00202790 A EP 00202790A EP 1048849 B1 EP1048849 B1 EP 1048849B1
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EP
European Patent Office
Prior art keywords
pump
chamber
membrane
liquid
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00202790A
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English (en)
French (fr)
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EP1048849A1 (de
Inventor
Louis-Claude Porel
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.)
Hydro Leduc SAS
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Hydro Leduc SAS
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Publication date
Priority claimed from FR9607043A external-priority patent/FR2749616B1/fr
Priority claimed from FR9613502A external-priority patent/FR2755472B1/fr
Application filed by Hydro Leduc SAS filed Critical Hydro Leduc SAS
Publication of EP1048849A1 publication Critical patent/EP1048849A1/de
Application granted granted Critical
Publication of EP1048849B1 publication Critical patent/EP1048849B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/243—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movement of cylinders relative to their pistons
    • F02M59/246—Mechanisms therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/08—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/12—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary
    • F02M59/14—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary of elastic-wall type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/243—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movement of cylinders relative to their pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/142—Intermediate liquid-piston between a driving piston and a driven piston

Definitions

  • the free pistons have a defect with regard to the sealing, a defect which is essential in the case where one must have an absolute seal. If we put in place a seal between the free piston and the cylinder in which it moves, it is not possible to obtain a perfect seal. If we remove the seal: or there is has a very thin film of oil between the friction surfaces and therefore micro-leaks: or there is no oil film and the friction surfaces will heat up. In the particular case of high-pressure gasoline injection no leak, also little is it, is not admissible and, of course, any warm-up risk of cause an explosion.
  • the present invention thus relates to a pumping device in which the moving elements, driven by an alternating movement of pumping by the pump hydraulic and ensuring a completely sealed separation between the liquid Hydraulic "motor” and the liquid to be pumped are deformable membranes.
  • German Patent 2,447,741 WANNER a diaphragm pump has been described. which is mechanically linked to a piston which slides inside a piston of hydraulic pump.
  • the disadvantages are the same as for the patent US 4,392,787 cited above.
  • the present invention proposes a device in which which each membrane is free and in which, at the end of each cycle of a piston, the dead chamber, located downstream of the top dead center of this piston (position maximum compression), in which is the liquid in contact with the membrane is put into communication with the reserve of hydraulic fluid; of so that the liquid which is there is pushed back towards this reserve first by the relaxation of the liquid, then by the effect of repression by the membrane which is corum by a spring.
  • the present invention relates to a pump for pump any kind of liquid while printing a pressure of very high discharge, of the type constituted by the association of two pumps: on the one hand, a hydraulic pump; on the other hand, a second pump whose moving means, carrying out the suction and the delivery of the liquid to be pumped, are flexible membranes animated with a reciprocating motion in a more direction in the other by the displacement of the hydraulic fluid pumped and then sucked by the first pump characterized by the fact that the pistons of the first pump are hollow and traversed by the hydraulic fluid which, during the suction phase crosses a lunula or groove dug in the face of the bias or cam plate; the deformable membranes being each controlled by a spring so that that at the end of the compression stroke of each piston, the communication is between the chamber where the hydraulic fluid is pushed back against the membrane and the suction chamber, this liquid being, on the one hand, sucked by the movement of the piston and pushed back by the membrane under the action of its spring,
  • the present invention relates to means for vary the displacement of the first pump and therefore the flow of gasoline to the injection devices.
  • variable inclination bias tray or the arrangement of means in the pistons of the hydraulic pump, having for function to short-circuit all or part of the volume of hydraulic fluid introduced into the bore during the suction phase.
  • each hollow piston of the hydraulic pump is provided with openings that can be obscured in whole or in part by a mobile shirt, all the moving jackets being moved together by a control member subject to the operating conditions of the engine.
  • the device according to the invention comprises a first pump, designated by the general reference I and a second pump, designated by the general reference II.
  • the first pump I is an axial piston pump driven by a movement alternate back-and-forth by a bias tray 1.
  • the bias plate 1 is integral with a drive shaft 2 (driven by any means not shown) carried by bearings 3.
  • a plurality of hollow pistons 4 take support against the oblique face of the plate 1 each by means of a sliding block 5, which is pierced at its center with a bore 6.
  • Each piston 4 is held by a spring 7 against his stud.
  • On the front face 1 is engraved a lunula 8.
  • This room 9 opens, through a plurality of holes 22, through the body 21 of the pump 1, in a tank 11.
  • This tank 11 is constituted by a cylindrical envelope 23 surrounding the body 21.
  • the side of the bias plate 1 oscillates in the chamber 9 so that the pistons 4 are driven reciprocating back and forth: in the direction corresponding to the suction, the pistons 4 are driven by their spring 7; in the other direction which corresponds to the repression under pressure, they are pushed back to against the spring 7 by the bias plate 1.
  • the hydraulic fluid that is in the chamber 9 gets inside the pistons 4 passing through the lunula 8 and the bore 6 of the studs 5.
  • each bore 12 in which slides a hollow piston 4 has at its end a non-return valve ; so that all of said pistons 4 causes a flow under pressure (and even under high pressure since one can exceed 1000 bars with this type of pump).
  • none of the bores 12 in which slide the pistons 4 has a non-return valve.
  • a pump 1 is associated with the pump I immediately downstream thereof.
  • each bore 2 of the pump I corresponds, in the pump II, a chamber or bore 13 divided into two parts 13a and 13b by a flexible membrane 24 biased by a spring 15.
  • the part 13a communicates directly with the end of the bore 12, while the portion 13b is provided with its end opposite the membrane 24 of a suction valve 16 and a valve 17. All valves 17 flow in a common pipe 18.
  • each spring 15 is supported on the rear face of the membrane 24 via a cup 20.
  • the shape of the cup 20 is determined so that the support of the cup 20 on the face rear of the membrane 24 does not cause any deterioration thereof.
  • the displacement of the membrane 24 in the direction of the arrow f2 has the effect to suck the product to be pumped into the part 13b of the bore 13, through the valve anti-return valve 16 and to discharge the hydraulic fluid in the part 13a.
  • Each membrane 24 is subjected on its two front and rear faces and that of uniformly distributed over the entire surface of the membrane, at the same pressure: on one side the pressure of the engine hydraulic fluid, on the other hand the pressure of the liquid discharged. The membrane therefore undergoes no mechanical effort and therefore can not tear.
  • the pump according to the present invention is therefore a diaphragm pump in which each membrane is, in the phase of repression, an equipression of each side which allows to have a pressure of discharge equal to the pressure hydraulic that can provide the first pump I.
  • liquids can no longer be considered as incompressible.
  • the hydraulic fluid pressure is at its maximum.
  • the stud 5 is on the beginning of the lunula 8 the liquid, in detent will push through the piston 4, the passage 6 of the stud 5 and the lunula 8 in the chamber 9; then it will be discharged by the action of the spring 15.
  • the compressed liquid is hot while the liquid in the chamber 9 and the tank is not; he will therefore there must be at each cycle a small exchange of liquid heated by the compression and unheated liquid which will allow to ensure a thermal balance of the first pump 1.
  • the envelope cylindrical 23 of the tank can be provided with cooling fins.
  • the engine oil can advantageously be used as hydraulic fluid itself by directly communicating the chamber 9 with the circuit of motor oil distribution, the temperature of this oil being regulated by the appropriate engine parts.
  • the pump according to the invention can also be used to circulate under pressures the drilling muds.
  • the suction force of the second pump II which is linked to the power of the springs 15, allows a return to the initial position of the membranes 24, because of the communication with the chamber 9.
  • this liquid is gasoline intended to supply an engine
  • it can be interesting to vary the volume of gasoline pumped by the pump It for adapt it to the operating conditions of the engine.
  • the first solution consists in producing the first pump 1, in the form of a variable flow pump using a variable inclination bias 1 tray as this is achieved in some pumps produced by the plaintiff.
  • the device according to this second solution is characterized by the fact that it comprises a double pump such as that described in the patent application 96.07043, but in which each piston of the hydraulic pump is provided with means allowing all or part of the flow pumped by said piston to be canceled.
  • Figures 3 and 4 describe a double pump similar to that of Figures 1 and 2 in which the same elements bear the same references.
  • each hollow piston 4 is traversed by in part by a pipe 30.
  • the pistons 4 are carried by two supports 31 and 32 pierced with holes in which said pistons slide.
  • the orifices pierced in the support 31 are designated by the reference 33, while the orifices pierced in the support 32 constitute the cylinders 12 mentioned above.
  • the thickness of support 32 is larger than the maximum stroke of the pistons 4.
  • the space between the supports 31 and 32 constitutes an annular chamber 35.
  • each piston 4 is partially covered by a shirt 34.
  • These sliding folders are all connected to a connecting rod of control 38 so as to slide all together between two positions extremes, the first being illustrated in Figure 3, the second being illustrated in figure 4.
  • the springs 7 of FIGS. 1 and 2, whose function is to maintain the heads of the pistons resting against their sliding block 5 are replaced by a pusher 7b which acts on a collar 6 which bears on the back of each head of piston 4.
  • the pusher 7b is counterfeit by a spring 7a.
  • the pusher 7b, counteracting the collar 6 of each piston head is traversed by a duct 37 which communicates with each other the two chambers 9 and 35.
  • each volume 13 is divided into two parts 13a, 13b by a membrane 24 pushed back by a spring 15 bearing on the membrane 24 by means of a cup 20.
  • a circular plate 42 is disposed against said portion 41b and is immobilized in position relative thereto by a pin 42a.
  • This plate 42 has as many 43 holes there are bores 12 and rooms 13.
  • the chambers 13 are formed in a part 45 which is screwed to the open end of the part 40b of the housing 40.
  • a membrane 44 which has the form of a disc having the same diameter as the plate 42. The membrane 44 is pinch between the plate 42 of the end of the piece 45.
  • Each piercing 43 communicates with a bore 12 of the pump I and is in front of a volume 13.
  • each chamber 13 is associated a conduit 50 connected to a chamber 51 where the liquid arrives at pump through a pipe 52.
  • the conduit 50 is pierced through the mass of the workpiece 45 and opens at its end opposite the chamber 51 against the membrane 44.
  • the plate 42 which is interposed between the part 41, in which are formed the bores 12 of the pistons 4 and the piece 45, in which the chambers are arranged 13 comprises two housing 53 and 54 connected by a pipe 55.
  • the housing 53 is dug in the face of the part 42 which is in contact with the membrane 44; while the housing 54 is dug in the face that is in contact with the workpiece 41.
  • the housing 54 has a configuration such that it communicates with the bore 12; and the housing 53 reaches the level of the chamber 13.
  • the hydraulic pump I is a swash plate pump or bias plate and the pistons are pistons Axial.

Claims (27)

  1. Pumpe, die es gestattet, jede beliebige Art von Flüssigkeit zu pumpen, indem sie diese gleichzeitig mit einem sehr hohen Förderdruck beaufschlagt, der Art, die durch die Zusammenschaltung zweier Pumpen gebildet ist, nämlich: einerseits einer Hydraulikpumpe (I), die eine Vielzahl von Kolben (4, 104) und eine Taumelscheibe (1) oder Nockenscheibe (101) umfaßt, und andererseits einer zweiten Pumpe (II), deren bewegliche Mittel, welche das Ansaugen und das Fördern der zu pumpenden Flüssigkeit durchführen, elastische Membranen sind, die mit einer abwechselnden Bewegung zunächst in eine Richtung, dann in die andere, mittels Verdrängung der Hydraulikflüssigkeit, die von der ersten Pumpe (I) gepumpt und dann wieder angesaugt wird, bewegt werden, dadurch gekennzeichnet, daß die Kolben (4, 104) der ersten Pumpe (I) hohl sind und die Hydraulikflüssigkeit durch sie hindurchfließt, die während der Ansaugphase durch eine sichelförmige Vertiefung (8, 108) hindurchströmt, die in die Vorderseite der Taumelscheibe (1) oder Nockenscheibe (101) eingelassen ist, wobei die verform bare Membran (24, 44) von einer Feder (15) so gegengespannt wird, daß am Ende des Förderhubes jedes Kolbens (4, 104) die Verbindung zwischen der Kammer (12-13), in der die Hydraulikflüssigkeit gegen die Membran (24, 44) gefördert wird, und der Ansaugkammer (9, 109) hergestellt wird, wobei diese Flüssigkeit dann einerseits durch die Bewegung des Kolbens (4, 104) angesaugt und andererseits über die Membran (24, 44) unter der Wirkung deren Feder (15) gefördert wird, was gleichzeitig einen Austausch zwischen der durch den Druck erwärmten Hydraulikflüssigkeit und der nicht erwärmten Flüssigkeit und eine Rückführung der Membran (24, 44) in ihre Anfangsstellung sicherstellt.
  2. Pumpe nach Anspruch 1, bei der die erste Pumpe (1) oder die Hydraulikpumpe eine Pumpe mit einer Taumelscheibe (1) und mit axial angeordneten Kolben (4) ist, wobei diese axial angeordneten Kolben hohl sind und von Federn (7, 7a) so gegengespannt werden, daß der Kopf (4a) jedes hohlen Kolbens (4) mittels eines Gleitsteins (5), durch den eine Mittelbohrung (6) hindurchläuft, in Anlage gegen die Taumelscheibe (1) kommt, wobei dieser Gleitstein während der Ansaugphase des entsprechenden Kolbens eine in die Vorderseite der Taumelscheibe (1) eingelassene sichelförmige Vertiefung (8) überlappt, so daß während dieser Phase eine direkte Verbindung zwischen der Kammer (9), in der sich die Taumelscheibe (1) bewegt, und der Kammer (13a), in welche die Hydraulikflüssigkeit während der Druckphase gefördert wurde, hergestellt wird.
  3. Pumpe nach Anspruch 1, in der die erste Pumpe (I) oder Hydraulikpumpe eine Pumpe mit radial verlaufenden Kolben (104) ist, die von einer Nockenscheibe (101) angetrieben werden, wobei die radial verlaufenden Kolben (104) hohl sind und von Federn (107) derart gegengespannt werden, daß der Kopf (104a) jedes hohlen Kolbens (104) mittels eines Gleitsteins (105), durch den eine Mittelbohrung (106) hindurchläuft, gegen die Taumelscheibe (101) anliegt, wobei sich dieser Stein und eine in die Oberfläche der Nockenscheibe (101) eingelassene Nut (108) während der Ansaugphase des entsprechenden Kolbens überlappen, so daß während dieser Phase eine direkte Verbindung zwischen der Kammer (109), in der die Nockenscheibe (101) bewegt wird, und der Kammer (13a), in welche die Hydraulikflüssigkeit während der Druckphase gefördert wurde, hergestellt wird.
  4. Pumpe nach Anspruch 2, bei der die zweite Pumpe (II) ebenso viele Kammern oder Bohrungen (13) aufweist wie die zweite Pumpe (I) Bohrungen (12) umfaßt, wobei jede Kammer (13) der zweiten Pumpe (II) direkt mit der entsprechenden Bohrung (12) der ersten Pumpe (I) derart in Verbindung steht, daß jeder Kolben (4, 104) der ersten Pumpe (I) die Hydraulikflüssigkeit zyklisch in die entsprechende Kammer (13) der zweiten Pumpe (II) fördert und ansaugt.
  5. Pumpe nach Anspruch 4, bei der jede Bohrung (13) der zweiten Pumpe (II) durch eine verformbare, von einer Feder (15) gegengespannte Membran (24) in zwei Teile (13a, 13b) unterteilt wird, nämlich das Teil (13a), das mit der entsprechenden Bohrung (12) der ersten Pumpe (I) in Verbindung steht und die von dieser geförderte und wieder angesaugte Hydraulikflüssigkeit aufnimmt, und das andere Teil (13b), das mit Ansaugventilen (16) und Förderventilen (17) versehen ist, die das zu pumpende Produkt ansaugen und fördern.
  6. Pumpe nach Anspruch 5, bei der jede Feder (15) mittels eines Federtellers (20) gegen die Rückseite der entsprechenden elastischen Membran (24) anliegt, wobei der Federteller (20) so ausgebildet ist, daß er keine Beschädigung der Rückseite der Membran (24) verursacht.
  7. Pumpe nach einem der vorhergehenden Ansprüche, bei der die Kammer (9, 109), in der sich die Köpfe (4a, 104a) der Kolben (4, 104) bewegen, mit einem Tank für Hydraulikflüssigkeit verbunden ist.
  8. Pumpe nach Anspruch 7, bei welcher der Tank (11) für Hydraulikflüssigkeit außerhalb der ersten Pumpe (I) liegt und mit letzterer über eine Leitung (10) in Verbindung steht, die in die Kammer (9) mündet.
  9. Pumpe nach Anspruch 7, bei welcher der Tank (11) durch eine zylindrische Hülle (23) gebildet ist, die den Körper (21) der ersten Pumpe umgibt und mit der Kammer (9) über eine Vielzahl von Öffnungen (22) in Verbindung steht.
  10. Pumpe nach Anspruch 2, bei der die einzelnen verformbaren Membranen (24) durch eine einzige Membran (44) ersetzt sind, die zwischen den Bohrungen (12) der Kolben (4) und den Kammern (13) angeordnet ist.
  11. Pumpe nach Anspruch 10, bei der eine kreisförmige Platte (42) zwischen dem Teil (41), in dem die Bohrungen (12) ausgebildet sind, und dem Teil (45), in dem die Kammern (13) ausgebildet sind, angeordnet ist, wobei dieses Teils mittels Bohrungen (43) jede Bohrung (12) mit der ihr entsprechenden Kammer (13) verbindet.
  12. Pumpe nach Anspruch 10, bei der in jeder Kammer (13) eine Feder (15) angeordnet ist, die über einen Teller (20) an der Membran (44) anliegt.
  13. Pumpe nach Anspruch 12, bei der jede Kammer (13) einem Ansaug-Rückschlagventil (16) und einem Förder-Rückschlagventil (17) zugeordnet ist.
  14. Pumpe nach Anspruch 12, bei der jede Kammer (13) nur einem Förder-Rückschlagventil (17) zugeordnet ist, wobei das Ansaug-Rückschtagventit (16) weggelassen ist und seine Funktion durch die Membran (44) selbst erfüllt wird.
  15. Pumpe nach Anspruch 14, bei der die Zuführleitung (50) für die zu pumpende Flüssigkeit gegen die Membran (44) mündet, die während der Förderphase in Anlage gegen die Öffnung dieser Leitung gehalten wird und während der Ansaugphase von dieser beabstandet ist.
  16. Pumpe nach Anspruch 15, bei welcher der Abschnitt der Membran (44), der gegen die Zuführöffnung (50) für die Flüssigkeit zur Anlage kommt, mit einem Verstärkungsteller (57) versehen ist.
  17. Pumpe nach Anspruch 15, bei welcher die Membran (44) während der Ansaugphase an den Boden einer Aufnahme (53) kommt, um einen Durchlaß (56) zur Verbindung zwischen der Zuführleitung (50) für die Flüssigkeit und der Kammer (13) freizugeben.
  18. Pumpe nach Anspruch 17, bei der die Membran (44) durch Formgebung so vorgeformt ist, daß sie während des Ansaugens den Boden der Aufnahme (53) bedeckt, um den Durchlaß (56) freizugeben.
  19. Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie zur Versorgung von Kraftstoff-Einspritzdüsen für Verbrennungsmotoren unter hohem Druck bestimmt ist, wobei die Hydraulikflüssigkeit der ersten Pumpe (I) das Öl des Motors sein kann.
  20. Pumpe nach Anspruch 19, dadurch gekennzeichnet, daß sie Mittel zum Verändern der Fördermenge der Hydraulikpumpe (I) und infolgedessen der Fördermenge der Pumpe (11) umfaßt, um so die Fördermenge von unter Hochdruck in die Einspritzdüsen gepumptem Kraftstoff an die Betriebsbedingungen des Motors anzupassen.
  21. Pumpe nach Anspruch 20, bei der die Taumelscheibe (1) der Hydraulikpumpe (I) eine Platte mit veränderbarer Neigung ist.
  22. Pumpe nach Anspruch 20, dadurch gekennzeichnet, daß jeder Kolben (4) der Hydraulikpumpe (1) mit Öffnungen (36) versehen ist, die ganz oder teilweise von einem beweglichen Mantel (34) verdeckt sein können, wobei alle beweglichen Mäntel (34) zusammen durch ein Steuerorgan (38) verschoben werden, das gemäß den Betriebsbedingungen des Motors angesteuert wird.
  23. Vorrichtung nach Anspruch 22, bei der die Kolben in zwei Trägern (31, 32) gleiten, in die Öffnungen (33, 12) eingebracht sind, wobei diese beiden Träger durch einen ringförmigen Raum voneinander getrennt sind, der eine Kammer (35) bildet, in der sich die Mäntel (34) zwischen zwei Endstellungen verschieben, wobei in der einen Stellung, in der die Öffnungen (36) nicht von den Mänteln (34) verdeckt sind, die gesamte von jedem Kolben (4) geförderte Flüssigkeit durch die Öffnungen (36) der Kolben in die ringförmige Kammer (35) zurückfließt und die Fördermenge der Pumpe (I) gleich Null ist, und in der anderen Stellung, in der alle Öffnungen (36) von den Mänteln (34) verdeckt sind, jeder Kolben (4) die gesamte angesaugte Hydraulikflüssigkeit in das Volumen (13) fördert und die Fördermenge der Pumpe (I) dabei maximal ist.
  24. Vorrichtung nach Anspruch 23, bei der die Mäntel (34) alle Zwischenstellungen einnehmen können, die zwischen den beiden Endstellungen liegen, so daß die Fördermenge der Pumpe (I) für alle Werte reguliert werden kann, die im Bereich von einer Fördermenge gleich Null bis zu einer maximalen Fördermenge liegen.
  25. Vorrichtung nach Anspruch 24, bei der alle Mäntel (34) an ein gemeinsames Steuerorgan (38) gekoppelt sind, das von einer geeigneten Steuervorrichtung angesteuert wird, um die Kraftstoffmenge unter hohem Druck abhängig vom Versorgungsbedarf des Motors zu regulieren, ohne daß unter hohem Druck stehendes Benzin in den Tank zurückgeführt wird.
  26. Anordnung nach Anspruch 25, bei der eine Dämpfungsvorrichtung stromabwärts des Auslasses (29) der zweiten Pumpe (II) und stromaufwärts der Einspritzdüsen angeordnet ist, um die durch die erste Pumpe (I) erzeugte Pulsationswirkung zu beseitigen.
  27. Vorrichtung nach Anspruch 26, bei der die Dämpfungsvorrichtung eine im Vergleich zur Kraftstoffmenge große Volumenkapazität aufweist, die durch jedes geeignete Mittel in der Art eines hydraulischen Akkumulators unter dem Einspritzdruck gehalten wird.
EP00202790A 1996-06-07 1997-05-30 Flüssigkeitshochdruckpumpe Expired - Lifetime EP1048849B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9607043 1996-06-07
FR9607043A FR2749616B1 (fr) 1996-06-07 1996-06-07 Pompe a haute pression pour tous liquides
FR9613502 1996-11-06
FR9613502A FR2755472B1 (fr) 1996-11-06 1996-11-06 Dispositif d'alimentation a haute pression d'injecteurs d'essence pour moteurs a combustion interne
EP97926060A EP0901575B1 (de) 1996-06-07 1997-05-30 Hochdruckpumpe für alle flüssigkeiten

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP97926060A Division EP0901575B1 (de) 1996-06-07 1997-05-30 Hochdruckpumpe für alle flüssigkeiten

Publications (2)

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EP1048849A1 EP1048849A1 (de) 2000-11-02
EP1048849B1 true EP1048849B1 (de) 2005-03-16

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EP00202790A Expired - Lifetime EP1048849B1 (de) 1996-06-07 1997-05-30 Flüssigkeitshochdruckpumpe
EP97926060A Expired - Lifetime EP0901575B1 (de) 1996-06-07 1997-05-30 Hochdruckpumpe für alle flüssigkeiten

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EP97926060A Expired - Lifetime EP0901575B1 (de) 1996-06-07 1997-05-30 Hochdruckpumpe für alle flüssigkeiten

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US (1) US6264437B1 (de)
EP (2) EP1048849B1 (de)
JP (1) JP3990732B2 (de)
DE (1) DE69732802T2 (de)
ES (1) ES2238968T3 (de)
PT (1) PT1048849E (de)
WO (1) WO1997047883A1 (de)

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Also Published As

Publication number Publication date
DE69732802D1 (de) 2005-04-21
DE69732802T2 (de) 2006-04-06
WO1997047883A1 (fr) 1997-12-18
EP0901575B1 (de) 2011-06-01
EP1048849A1 (de) 2000-11-02
ES2238968T3 (es) 2005-09-16
US6264437B1 (en) 2001-07-24
JP2000511989A (ja) 2000-09-12
EP0901575A1 (de) 1999-03-17
JP3990732B2 (ja) 2007-10-17
PT1048849E (pt) 2005-05-31

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