EP1317624B1 - Systeme hydraulique comportant une pompe principale et une pompe de precompression - Google Patents

Systeme hydraulique comportant une pompe principale et une pompe de precompression Download PDF

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Publication number
EP1317624B1
EP1317624B1 EP01956507A EP01956507A EP1317624B1 EP 1317624 B1 EP1317624 B1 EP 1317624B1 EP 01956507 A EP01956507 A EP 01956507A EP 01956507 A EP01956507 A EP 01956507A EP 1317624 B1 EP1317624 B1 EP 1317624B1
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EP
European Patent Office
Prior art keywords
hydraulic system
pump
regulating device
main pump
pressure
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
EP01956507A
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German (de)
English (en)
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EP1317624A1 (fr
Inventor
Ralf Lemmen
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Brueninghaus Hydromatik GmbH
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Publication date
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Publication of EP1317624A1 publication Critical patent/EP1317624A1/fr
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Publication of EP1317624B1 publication Critical patent/EP1317624B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0209—Rotational speed
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/12—Combinations of two or more pumps the pumps being of different types at least one pump being of the rotary-piston positive-displacement type

Definitions

  • the invention relates to a hydraulic system according to the preamble of claim 1.
  • a hydraulic system of this kind is eg in the DE-AS 23 57 739 or DE 34 01 775 C2 or WO 99/61796 described.
  • WO 99/61796 is a hydraulic system with an adjustable main pump and its upstream and connected to it by a connecting line form pressure pump described, wherein in the connecting line an adjustable throttle is arranged, which is adjustable by an electronic control device.
  • the input pressure of the main pump can be changed, whereby influence on the flow rate of the main pump can be taken.
  • this known embodiment is disadvantageous that heat is generated in the functional operation by the throttle, not only as Power loss but also leads to a warming of the hydraulic medium with associated cooling problems.
  • From the GB 2150981A is to remove a method and a device for conveying fluid, wherein a first and a second pump are provided, which convey fluid from a reservoir to a line end.
  • the first pump and the second pump are each adjustable by an adjusting device which can be controlled by a programmable control device. It is the purpose of this prior art hydraulic system to ensure the most even possible discharge of the pumped out of a reservoir liquid at the line end.
  • the invention has the object of providing a hydraulic system of the type described in such a way that a high efficiency of the system can be achieved.
  • the pre-pressure pump has an adjusting device for adjusting the Delivery volume, wherein the pre-pressure pump is controlled or regulated taking into account control or control signals of at least one consumer.
  • This embodiment according to the invention is advantageous with regard to several aspects.
  • the suction pressure of the main pump can be increased or optimized and losses resulting therefrom reduce and thus increase the efficiency and performance of the main pump and the system.
  • a flow resistance and a resulting loss, as in the known system according to WO 99/61796 is present by the adjustable throttle, is omitted in the embodiment of the invention.
  • the pre-pressure pump In the context of the invention, it is possible to perform an adjustment of the pre-pressure pump and a determination or positioning in the set position manually or by means of a control or regulating device. In the first case, it only requires an adjustment mechanism of the pre-pressure pump, which is manually operable. In the second case, the adjustment of the pre-pressure pump is associated with a control or regulating device, which preferably operates automatically.
  • hydraulic system extends from a tank 2, a suction line 3 to the input 4 of a pre-pressure pump 5, the delivery volume is adjustable.
  • the pre-pressure pump 5 has an adjusting device 6, which can be adjusted by a first control or regulating device 7 and in the adjusted or set position.
  • a connecting line 9 extends to the input 11 of a main pump 12, the delivery volume is preferably also adjustable.
  • the main pump 12 has an adjusting device 13, which is adjustable and adjustable by a second control or regulating device 14.
  • the invention is not limited to a particular type of construction or function of the Pumpen'5, 12. This also applies to the adjusting devices 6, 13 and the control and regulating devices 7, 14. These may be of one of the known construction and functional types.
  • the pumps can each be, for example, a vane pump, radial piston pump or preferably axial piston pump.
  • the pumps 5, 12 may be pressure controlled or flow rate controlled or power controlled.
  • the Control devices 7, 14 may have a pressure regulator or flow regulator or power regulator.
  • control or regulating functions are controlled or regulated by the associated control or regulating device 7, 14 taking into account control or regulating signals which are supplied to the control or regulating device 7, 14 by means of control or signal lines.
  • Fig. 1 shows a control or signal line 15, which extends from one of the output 16 of the main pump 12 to a consumer A extending working pressure line 17 to the second control or regulating device 14.
  • This may be, for example, a pressure signal for a pressure regulator or a flow rate signal for a flow regulator or a pressure and flow rate signal for a power regulator.
  • pressure signals or flow rate signals from the priming pump may be supplied to a pressure regulator or flow regulator of the first controller 7, e.g. by a control or signal line 18, which connects the connecting line 9 with the first control or regulating device 7. It is also possible to supply these signals also or only to the pressure regulator or flow regulator or power regulator of the second control device 14, which is illustrated by a connected to the second control device 14 control or signal line branch 18a.
  • the first control or regulating device 7 is operated as a function of the second control or regulating device 14.
  • the first control or regulating device 7 corresponding signals from the second control or regulating device 14 are transmitted, for example, by a signal line connecting them 19.
  • the control or signal line branch 18b omitted.
  • the control signals may also be supplied by the consumer A to the first controller 7 and / or the second controller 14, e.g. by signal lines which connect the consumer A respectively to the first and / or second control or regulating device 7, 14.
  • two consumers B, C e.g. a device are present, from which the control or regulating signals of the one consumer B of the second control or regulating device 14 and the control or regulating signals of the other consumer C of the first control or regulating device 7 are supplied, e.g. by the signal lines 20, 21.
  • the second consumer C may be connected by a connecting line branch 9a to the connecting line 9 and thus fed from it.
  • the priming pump 5 in response to the main pump 12 by the adjusting devices 6, 13 interconnecting mechanical coupling 22 to control or regulate.
  • the coupling 22 may be formed, for example, by a connecting rod 22a, which is pivotally connected to the pivoting devices or with their pivoting levers.
  • both pumps 5, 12 When the pre-pressure pump 5 is adjusted and adjusted by a suitable control or regulating device or coupling as a function of the adjustment of the main pump 12, both pumps 5, 12 always have the same setting or delivery ratio, for example the same Swivel angle. In this case, the pressure in the connecting line 9 and thus the suction pressure of the main pump 12 is always constant. In contrast, in a independent of the main pump 12 control or regulation of the priming pump 5, the pressure in the connecting line 9 and thus also the suction pressure of the main pump 12 depending on the adjustment of the admission pressure pump 5 different.
  • a coupling 22 it is also possible, in the presence of a coupling 22, to realize an adjustment deviating from a synchronous adjustment of the priming pump 5, e.g. a deviating according to a certain characteristic adjustment.
  • This can e.g. by a suggestively illustrated gear 23 or a motor integrated in the mechanical coupling 22 and e.g. may be connected by a control or signal line 24 to the second control or regulating device 14.
  • the gear 23 or the engine can, for. B. be integrated into the mechanical coupling 22 and in the connecting rod 22 a that they their effective length, d. h., increase the distance of the connection or hinge points, in the desired manner or shorten.
  • connection 25 or overflow it is also possible in all embodiments in the further, between the connecting line 9 and the tank 2 to provide a hydraulic compensation connection 25 or overflow, which makes it possible, if the delivery rates of the pump 5, 12 are not the same size, an overflow of the hydraulic Medium to the tank or vice versa. If, for example, the delivery rate of the main pump 12 is smaller than the delivery rate of the admission pressure pump 5, hydraulic fluid can flow to the tank 2 when the admission pressure pump 5 is bypassed. On the other hand, it is also possible to suck hydraulic fluid to the connection line 9, bypassing the admission pressure pump 5, when the delivery rate of the main pump 12 is greater than that of the admission pressure pump 5.
  • two bypasses formed by hydraulic lines and bypassing the admission pressure pump 5 can be provided 26, 27 are formed, which is the connecting line 9 with the tank 2 or with the suction line 3 connect.
  • the bypasses 26, 27 may be connected to the tank 2 or to the suction line 3, which is represented by indicated line branches.
  • admission pressure pump 5 separately from the main pump 12 or to grow it on the main pump 5 or to integrate it into the main adjustment system, e.g. to integrate into the main pump 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne un système hydraulique (1) comportant une pompe principale (12) et une pompe de précompression (5), la sortie de cette dernière (5) étant reliée par une conduite de raccordement (9) à l'entrée (11) de la pompe principale (12). La sortie (16) de la pompe principale (12) peut être reliée par une conduite de travail (17) à un consommateur (A, B). Le débit volumétrique à l'entrée (11) de la pompe principale (12) est variable. L'objectif de l'invention est de permettre l'obtention d'un rendement élevé. A cet effet, la pompe de précompression (5) présente un dispositif de réglage (6) servant à régler son débit.

Claims (17)

  1. Système hydraulique (1) comprenant une pompe principale (12) et une pompe préliminaire (5), la sortie (8) de la pompe préliminaire (5) étant reliée par une conduite de liaison (9) à l'entrée (11) de la pompe principale (12), la sortie (16) de la pompe principale (12) pouvant être reliée par une conduite de travail (17) à un dispositif utilisateur (A, B), et le flux volumétrique à l'entrée (11) de la pompe principale (12) étant variable,
    caractérisé en ce que
    la pompe préliminaire (5) comprend un dispositif de réglage (6) pour régler son débit de refoulement, et
    en ce que la pompe préliminaire (5) est commandée ou régulée en prenant en compte des signaux de commande ou de régulation d'au moins un dispositif utilisateur (A, B).
  2. Système hydraulique selon la revendication 1,
    caractérisé en ce que la pompe principale (12) également comprend un dispositif de réglage (13) pour régler son débit de refoulement.
  3. Système hydraulique selon la revendication 1 ou 2,
    caractérisé en ce que le dispositif de réglage (6) de la pompe préliminaire (5) et/ou le dispositif de réglage (13) de la pompe principale (12) est/sont commandable(s) ou réglable(s) manuellement respectivement individuellement ou conjointement.
  4. Système hydraulique selon la revendication 1 ou 2,
    caractérisé en ce que le dispositif de réglage (6) de la pompe préliminaire (5) et/ou le dispositif de réglage (13) de la pompe principale (12) sont commandables ou réglables par un dispositif de commande de régulation (14) respectif associé ou par un dispositif de commande ou de régulation (14) commun.
  5. Système hydraulique selon la revendication 4,
    caractérisé en ce que la pompe principale (12) est commandée ou régulée en tenant compte de la pression dans la conduite de travail (17) et/ou de la pression dans la conduite de liaison (9).
  6. Système hydraulique selon la revendication 4 ou 5,
    caractérisé en ce que la pompe préliminaire (5) est commandée ou régulée en tenant compte de la pression dans la conduite de travail (17) et/ou de la pression dans la conduite de liaison (9).
  7. Système hydraulique selon l'une des revendications précédentes,
    caractérisé en ce que la pompe principale (12) est commandée ou régulée en tenant compte de signaux de commande ou de régulation d'au moins un dispositif utilisateur (A, B).
  8. Système hydraulique selon l'une des revendications 4 à 6,
    caractérisé en ce que le premier dispositif de régulation (7) ou le second dispositif de régulation (14) ou le dispositif de régulation commun (14) comprend un régulateur de pression.
  9. Système hydraulique selon l'une des revendications 4 à 6 ou 8,
    caractérisé en ce que le premier dispositif de régulation (7) ou le second dispositif de régulation (14) ou le dispositif de régulation commun (14) comprend un régulateur de débit de refoulement.
  10. Système hydraulique selon l'une des revendications précédentes 4 à 6 ou 8 ou 9,
    caractérisé en ce que le premier dispositif de régulation (7) ou le second dispositif de régulation (14) ou le dispositif de régulation commun (14) comprend un régulateur de puissance.
  11. Système hydraulique selon l'une des revendications précédentes,
    caractérisé en ce que la pompe préliminaire (5) est commandée ou régulée de manière synchrone en fonction de la pompe principale (12).
  12. Système hydraulique selon la revendication 11,
    caractérisé en ce que les dispositifs de réglage (6, 13) de la pompe préliminaire (5) et de la pompe principale (12) sont couplés l'un à l'autre par un couplage (22) de préférence mécanique.
  13. Système hydraulique selon l'une des revendications précédentes,
    caractérisé en ce que la première conduite de liaison (9) comprend une ramification de liaison (9a) pour la liaison avec un second dispositif utilisateur (C).
  14. Système hydraulique selon l'une des revendications 4 à 6, 8, 9 ou 10,
    caractérisé en ce que le dispositif de commande ou de régulation (7) de la pompe préliminaire (5) et/ou le dispositif de commande ou de régulation (14) de la pompe principale (12), ou un dispositif de commande ou de régulation commun (14) tient/tiennent compte de signaux fonctionnels du dispositif utilisateur (A) ou du dispositif utilisateur respectivement associé (B, C).
  15. Système hydraulique selon l'une des revendications précédentes,
    caractérisé en ce qu'il est prévu un dispositif d'égalisation (25) pour le fluide hydraulique entre la conduite de liaison (9) ou la ramification de liaison (9a) et le réservoir (2) ou la conduite d'aspiration (3).
  16. Système hydraulique selon la revendication 15,
    caractérisé en ce que le dispositif d'égalisation (25) est formé par un by-pass (26, 27) qui contourne la pompe préliminaire (5), dans lequel est agencée une valve (28, 29), en particulier une valve antiretour, qui permet un écoulement dans l'une des directions d'écoulement et qui bloque dans l'autre direction d'écoulement.
  17. Système hydraulique selon la revendication 16,
    caractérisé en ce qu'il est prévu deux by-pass (26, 27), dont les soupapes (28, 29) s'ouvrent et se bloquent dans des directions d'écoulement mutuellement opposées.
EP01956507A 2000-09-13 2001-06-29 Systeme hydraulique comportant une pompe principale et une pompe de precompression Expired - Lifetime EP1317624B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10045118 2000-09-13
DE10045118A DE10045118B4 (de) 2000-09-13 2000-09-13 Hydraulisches System mit einer Hauptpumpe und einer Vordruckpumpe
PCT/EP2001/007459 WO2002023041A1 (fr) 2000-09-13 2001-06-29 Systeme hydraulique comportant une pompe principale et une pompe de precompression

Publications (2)

Publication Number Publication Date
EP1317624A1 EP1317624A1 (fr) 2003-06-11
EP1317624B1 true EP1317624B1 (fr) 2008-03-12

Family

ID=7655960

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Application Number Title Priority Date Filing Date
EP01956507A Expired - Lifetime EP1317624B1 (fr) 2000-09-13 2001-06-29 Systeme hydraulique comportant une pompe principale et une pompe de precompression

Country Status (5)

Country Link
US (1) US6997685B2 (fr)
EP (1) EP1317624B1 (fr)
JP (1) JP5016776B2 (fr)
DE (2) DE10045118B4 (fr)
WO (1) WO2002023041A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4585415B2 (ja) * 2005-09-20 2010-11-24 株式会社タクミナ 往復動ポンプユニット、及び往復動ポンプ接続用配管構造体
DE102006014194B4 (de) * 2006-03-28 2021-05-06 Bayerische Motoren Werke Aktiengesellschaft Hydrauliksystem zur Versorgung eines Aktuators in einem Kraftfahrzeug
DE102007032103B4 (de) 2007-05-16 2022-02-24 Robert Bosch Gmbh Pumpeneinheit mit einer Hauptpumpe und einer in ihrem Fördervolumen verstellbaren Ladepumpe
US9163618B2 (en) 2008-06-24 2015-10-20 Agilent Technologies, Inc. Automated conversion between SFC and HPLC
US8215922B2 (en) 2008-06-24 2012-07-10 Aurora Sfc Systems, Inc. Compressible fluid pumping system for dynamically compensating compressible fluids over large pressure ranges
US8454321B2 (en) 2009-05-22 2013-06-04 General Compression, Inc. Methods and devices for optimizing heat transfer within a compression and/or expansion device
EP2433000A2 (fr) * 2009-05-22 2012-03-28 General Compression Inc. Dispositif compresseur/détendeur
SG178980A1 (en) 2009-09-03 2012-04-27 Prad Res & Dev Ltd Pump assembly
WO2011027273A2 (fr) * 2009-09-03 2011-03-10 Schlumberger Canada Limited Corps de pompe
CA2785471A1 (fr) 2009-12-24 2011-06-30 General Compression Inc. Systeme et procedes permettant d'optimiser l'efficacite d'un systeme actionne hydrauliquement system
US8419936B2 (en) * 2010-03-23 2013-04-16 Agilent Technologies, Inc. Low noise back pressure regulator for supercritical fluid chromatography
WO2012078606A1 (fr) 2010-12-07 2012-06-14 General Compression, Inc. Compresseur et/ou dispositif détendeur comprenant un joint de piston rotatif
US8997475B2 (en) 2011-01-10 2015-04-07 General Compression, Inc. Compressor and expander device with pressure vessel divider baffle and piston
WO2012097215A1 (fr) 2011-01-13 2012-07-19 General Compression, Inc. Systèmes, procédés et dispositifs permettant la gestion de l'élimination de chaleur dans un dispositif ou un système de compression et/ou de dilatation
CA2824798A1 (fr) 2011-01-14 2012-07-19 General Compression, Inc. Systeme de stockage et de recuperation d'un gaz comprime et procede de fonctionnement des systemes
DE102011115805B4 (de) 2011-10-12 2021-12-09 Robert Bosch Gmbh Hydraulisches System mit einer Hauptpumpe und mit einer Ladepumpe
US8387375B2 (en) 2011-11-11 2013-03-05 General Compression, Inc. Systems and methods for optimizing thermal efficiency of a compressed air energy storage system
US8522538B2 (en) 2011-11-11 2013-09-03 General Compression, Inc. Systems and methods for compressing and/or expanding a gas utilizing a bi-directional piston and hydraulic actuator
DE102015216958A1 (de) * 2015-09-04 2017-03-09 Albert Ziegler Gmbh Verfahren zum Betreiben einer Feuerlöschpumpe
WO2020217934A1 (fr) 2019-04-25 2020-10-29 株式会社村田製作所 Dispositif de pompe
DE102020205941A1 (de) 2020-05-12 2021-11-18 Mahle International Gmbh Ölpumpsystem und ein Verfahren zum Regeln des Ölpumpsystems

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877091A (en) * 1931-10-19 1932-09-13 Harry F Vickers Variable volume pump
US3431856A (en) * 1967-02-06 1969-03-11 Continental Machines Two-stage pumping apparatus
US4312626A (en) * 1979-03-08 1982-01-26 Texaco Inc. Multi-stage compressor control system and method
GB2150981A (en) * 1983-11-10 1985-07-10 Vs Eng Ltd Apparatus and method for pumping a fluid
DE3401775C2 (de) * 1984-01-19 1996-10-17 Linde Ag Hydrostatische Einrichtung mit einer einstellbaren Pumpe
DE3401759A1 (de) * 1984-01-19 1985-08-01 Linde Ag, 6200 Wiesbaden Hydrostatische einrichtung
US4711616A (en) * 1984-12-13 1987-12-08 Nippondenso Co., Ltd. Control apparatus for a variable displacement pump
JPH089389Y2 (ja) * 1988-07-25 1996-03-21 日産ディーゼル工業株式会社 直噴式ディーゼルエンジンの燃料噴射装置
US5186612A (en) * 1992-01-16 1993-02-16 Caterpillar Inc. Variable pressure inlet system for hydraulic pumps
DE4403618A1 (de) * 1994-02-05 1995-08-10 Uraca Pumpen Kolbenpumpe mit Boosterpumpe
US5482441A (en) * 1994-04-18 1996-01-09 Permar; Clark Liquid flow control system
US5863186A (en) * 1996-10-15 1999-01-26 Green; John S. Method for compressing gases using a multi-stage hydraulically-driven compressor
DE69919658T2 (de) * 1998-05-26 2005-09-15 Caterpillar Inc., Peoria Hydrauliksystem mit einer pumpe mit variabler fördermenge
DE19902292A1 (de) * 1999-01-21 2000-07-27 Mannesmann Rexroth Ag Fördereinheit

Also Published As

Publication number Publication date
WO2002023041A1 (fr) 2002-03-21
US6997685B2 (en) 2006-02-14
DE50113730D1 (de) 2008-04-24
DE10045118B4 (de) 2006-02-09
US20030185687A1 (en) 2003-10-02
DE10045118A1 (de) 2002-03-28
EP1317624A1 (fr) 2003-06-11
JP5016776B2 (ja) 2012-09-05
JP2004509269A (ja) 2004-03-25

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