EP3622169B1 - Drive of a pump - Google Patents

Drive of a pump Download PDF

Info

Publication number
EP3622169B1
EP3622169B1 EP18734457.7A EP18734457A EP3622169B1 EP 3622169 B1 EP3622169 B1 EP 3622169B1 EP 18734457 A EP18734457 A EP 18734457A EP 3622169 B1 EP3622169 B1 EP 3622169B1
Authority
EP
European Patent Office
Prior art keywords
linear motors
pump
drive system
linear
drive
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.)
Active
Application number
EP18734457.7A
Other languages
German (de)
French (fr)
Other versions
EP3622169A1 (en
Inventor
Ignacio Diaz Diaz
Markus Knorr
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3622169A1 publication Critical patent/EP3622169A1/en
Application granted granted Critical
Publication of EP3622169B1 publication Critical patent/EP3622169B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F02M59/02—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
    • 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
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • F02B63/041—Linear electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/04—Pumps peculiar thereto
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the 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
    • 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
    • F04B49/06—Control using electricity
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0201—Position of the 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
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0409—Linear speed

Definitions

  • the invention relates to a pump, in particular a fuel pump, with at least one working chamber in which a piston delimits the working chamber in a cylinder by means of a drive system and pressurizes a fluid, in particular fuel, located in the working chamber.
  • the patent specification DE102014202937A1 develops this approach further and describes a pump that has a pump cylinder head with a pump cylinder and a pump plunger that can be moved up and down in a translatory manner in a cylinder guide embedded in the pump cylinder.
  • the pump plunger interacts with a linear drive.
  • the linear drive is mechanically connected to the pump plunger without play.
  • DE 10 2008 036 528 shows a method for operating a multi-pulse piston pump, in which at least two linear motors act as a drive and each linear motor acts on at least one piston and the linear motors are coordinated for pulsation control by means of a control unit.
  • linear motors require robust bearings that can absorb high tightening forces.
  • a linear motor design is only profitable if it is used in a high volume product.
  • the linear motor can also be designed to exceed requested ratings.
  • pump-specific or oversized linear motors are generally very expensive.
  • the invention is based on the object of creating a pump-specific, but nevertheless inexpensive drive for fuel pumps.
  • a pump in particular a fuel pump, with at least one working chamber in which a piston delimits the working chamber in a cylinder by means of a drive system and pressurizes a fluid, in particular fuel, located in the working chamber
  • the drive system at least two linear motors includes, wherein the linear motors (la-le) forming the drive system (3) are connected electrically and / or mechanically in parallel, a piston rod (7) connected to the piston (6) bundling a force, in particular a feed force, of the drive system (3) composed of linear motors .
  • Linear motors are preferably designed as direct drives and are therefore characterized by low noise emissions and a high power density. They enable translatory movements without gears, which is why they are considered to be low-wear and low-maintenance. Eliminating the gearbox also creates the prerequisite for a compact design.
  • the drive system of a pump, in particular a fuel pump, according to the invention comprises at least two linear motors.
  • the linear motors are primarily identical and therefore suitable for series production. This also has the advantage that linear motors can be kept in stock as spare parts and can be quickly exchanged if necessary.
  • the feed force and power can be scaled. In this way, high quantities of a linear motor can be manufactured, whereby various requirements in terms of power and / or feed force can be met.
  • redundancy can also be made possible by installing more linear motors than are actually required.
  • At least 20 linear motors connected electrically and / or mechanically in parallel drive the fuel pump.
  • a particularly safe and reliable operation which also enables a sufficient number of scaling steps, is achieved with a drive system made up of 40 to 50 linear motors.
  • a drive system made up of 40 to 50 linear motors.
  • 128 or more linear motors can also form a drive system.
  • a drive system with a smaller number of linear motors is also possible.
  • a parallel connection of several linear motors also serves to increase the feed force.
  • the linear motors forming the drive system are preferably arranged in parallel on a carrier.
  • Each linear motor advantageously has a mechanical power between 40 kW and 85 kW and provides a feed force of up to 20 kN.
  • the drive system preferably has at least one measuring system, at least one control unit for controlling the linear motors and at least one system for data transmission.
  • the measuring system preferably determines a position and / or speed of the linear motors on their respective travel path. The position and / or speed can also be realized by monitoring the voltage in the linear motor, preferably without an encoder.
  • the drive system advantageously has precisely one control unit.
  • the control unit controls the drive system.
  • the drive system which includes at least two linear motors, acts like just one linear motor.
  • the control unit issues commands to the drive system, in particular with regard to the speed.
  • the control unit realizes the aforementioned scaling by controlling only a certain number of linear motors with a lower power requirement.
  • the data which for example contain information on position and speed, as well as the data which contain commands to the linear motors, are transmitted between the respective linear motor and the measuring system or the control unit by means of a data transmission system.
  • a data transmission system is also advantageously implemented between the measuring system and the control unit.
  • Various bus systems or Industrial Ethernet can be used for data transmission.
  • the invention and the associated elimination of expensive and maintenance-intensive mechanical transmission components such as gear and / or cam disk and / or crankshaft greatly simplify mechanical implementation.
  • assembly and handling are made easier because fewer and smaller parts have to be connected.
  • Linear motors can be kept in stock as spare parts.
  • the pump can continue to be driven - albeit with reduced power - since the other linear motors are not affected by the error that has occurred.
  • the faulty one The linear motor can be exchanged quickly and easily, which has a positive effect on the high machine availability.
  • the invention offers the possibility of implementing a redundancy in the drive system of linear motors by installing a larger number of linear motors than required by inserting at least one redundant linear motor into the drive system according to the invention.
  • linear motors with moving magnets so-called moving magnet linear motors
  • linear motors with moving coils so-called moving coil linear motors
  • linear motors with moving magnets are preferably used, since electrical feed lines for the linear motor do not have to be moved. This offers the advantage that a travel path on which the linear motor moves can be designed in any length.
  • Each linear motor forming the drive system is preferably assigned at least one converter, in particular precisely one converter, which couples the respective linear motor to an electrical power supply network. Among other things, this enables the linear motor to be exchanged quickly and easily in the event of a fault.
  • a piston rod connected to the piston bundles a force, in particular a feed force, which the linear motors apply.
  • the invention offers the advantage that the required high forces can be achieved by means of the drive system in that a piston rod carries the forces of several parallel-connected, bundles small linear motors suitable for series production.
  • the figure shows a drive system 3 made up of five linear motors 1a, 1b, 1c, 1d and 1e, each of which can move back and forth on a route 2a, 2b, 2c, 2d and 2e in order to drive a pump 4, in particular a fuel pump.
  • the linear motors are arranged in parallel and mechanically connected in such a way that the forces of the linear motors 1a to 1e are bundled by means of a piston rod 7.
  • Each linear motor 1a to 1e is coupled to an electrical power supply network 40 by means of a converter 30a, 30b, 30c, 30d and 30e.
  • the linear motors 1a to 1e are connected to the respective associated converter 30a to 30e via electrical power supply lines 31a, 31b, 31c, 31d and 31e.
  • the converters 30a to 30e are connected to the electrical energy supply network 40 via further electrical energy supply lines 32a, 32b, 32c, 32d and 32e.
  • the power of the linear motors 1a to 1e is bundled by means of a piston rod 7.
  • the individual linear motors 1a to 1e advantageously move at the same speed.
  • the piston rod 7 moves a piston 6 which delimits a working space 5 in a cylinder of a pump 4.
  • fuel is drawn into the working chamber 5 through an inlet valve 11, preferably activated by the control unit 21 via a data transmission system 25, by the drive system 3 consisting of linear motors 1a to 1e - and thus each individual linear motor 1a to 1e - receives the command from the control unit 21 to drive to a rear end of the respective travel path 2a to 2e facing away from the pump 4.
  • the working space 5 thereby attains its maximum size and a negative pressure that occurs in the working space 5 draws the fuel in via the inlet valve 11.
  • a measuring system 20 detects when each linear motor 1a to 1e has reached an end position, whereupon the control unit 21 stops the linear motors 1a to 1e.
  • the measuring system 20 is connected to the linear motors 1a to 1e via a data transmission system 26.
  • the measuring system 20 advantageously also detects a speed and position of each linear motor 1a to 1e and can transmit this data to the control unit 21 via a system for data transmission between the control unit and the measuring system 27.
  • the control unit 21 therefore has the possibility of reacting, for example by braking or accelerating the linear motors 1a to 1e.
  • control unit 21 When the linear motors 1a to 1e reach the end position, the control unit 21 preferably closes both the inlet valve 11 and the outlet valve 10. An optional system for data transmission between the control unit 21 and valves 29 is available for this purpose.
  • the drive system 3 made up of linear motors 1a to 1e is caused by the control unit 21 to move in the direction of a front end of the respective travel path 2a to 2e facing the pump. As a result, the fuel in the working chamber 5 is pressurized. If the pressure is high enough, the control unit 21 opens the outlet valve 10. A level of the pressure is advantageously recorded by means of the measuring system 20 via an optional system for data transmission between the measuring system and the valves 28.
  • the control unit 21 and the measuring system 20 can have separate processing units or a common processing unit.
  • the systems for data transmission 25, 26, 27, 28 and 29 can be connected by means of lines or wirelessly.
  • the drive system 3 of linear motors shown by way of example in the figure has only five linear motors 1a to 1e. According to the invention, however, depending on the area of application, a larger or smaller number of linear motors can also form a drive system made up of linear motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Linear Motors (AREA)

Description

Die Erfindung betrifft eine Pumpe, insbesondere Kraftstoffpumpe, mit wenigstens einem Arbeitsraum, in welchem ein Kolben mittels eines Antriebssystems den Arbeitsraum in einem Zylinder begrenzt und ein im Arbeitsraum befindliches Fluid, insbesondere Kraftstoff, mit Druck beaufschlagt.The invention relates to a pump, in particular a fuel pump, with at least one working chamber in which a piston delimits the working chamber in a cylinder by means of a drive system and pressurizes a fluid, in particular fuel, located in the working chamber.

Wechselnde Kraftanforderungen und ein Betrieb unter Dauerlast verlangen nach Pumpen, insbesondere Kraftstoffpumpen, die einerseits widerstandsfähig, andererseits agil sind. Zudem sollen auch Ausfallzeiten möglichst gering gehalten werden, da diese einen hohen Kostenfaktor mit sich bringen. Daher werden Antriebe von Kraftstoffpumpen häufig mit rotatorischen Motoren und mechanischen Übertragungskomponenten - beispielsweise Getriebe und Kurbelwellen - ausgestattet. Besonders die mechanischen Übertragungskomponenten sind aber anfällig für Störungen und wartungsintensiv. Zudem ist ein derartiges System sehr komplex.Changing power requirements and operation under continuous load call for pumps, in particular fuel pumps, that are on the one hand resistant and on the other hand agile. In addition, downtimes should be kept as low as possible, as these entail a high cost factor. For this reason, drives for fuel pumps are often equipped with rotary motors and mechanical transmission components - for example gearboxes and crankshafts. The mechanical transmission components in particular are susceptible to malfunctions and require a lot of maintenance. In addition, such a system is very complex.

Daher hat die Patentschrift DE102007038529A1 eine Kraftstoffhochdruckpumpe mit mindestens einem Arbeitsraum zum Gegenstand, in welchem Kraftstoff mit Hochdruck beaufschlagt wird. Die Kraftstoffhochdruckpumpe ist antriebsmäßig mit einem Linearmotor gekoppelt.Hence the patent specification DE102007038529A1 a high-pressure fuel pump with at least one working chamber in which fuel is subjected to high pressure. The high-pressure fuel pump is drive-coupled to a linear motor.

Die Patentschrift DE102014202937A1 entwickelt diesen Ansatz weiter und beschreibt eine Pumpe, die einen Pumpenzylinderkopf mit einem Pumpenzylinder und einen in einer in den Pumpenzylinder eingelassenen Zylinderführung translatorisch auf und ab bewegbaren Pumpenstößel aufweist. Der Pumpenstößel wirkt antriebsseitig mit einem Linearantrieb zusammen. Der Linearantrieb ist mechanisch spielfrei mit dem Pumpenstößel verbunden.The patent specification DE102014202937A1 develops this approach further and describes a pump that has a pump cylinder head with a pump cylinder and a pump plunger that can be moved up and down in a translatory manner in a cylinder guide embedded in the pump cylinder. On the drive side, the pump plunger interacts with a linear drive. The linear drive is mechanically connected to the pump plunger without play.

DE 10 2008 036 528 zeigt ein Verfahren zum Betrieb einer mehrpulsigen Kolbenpumpe, bei dem zumindest zwei Linearmotoren als Antrieb fungieren und jeder Linearmotor auf zumindest einen Kolben wirkt und die Linearmotoren zur Pulsationskontrolle mittels einer Steuereinheit koordiniert werden. DE 10 2008 036 528 shows a method for operating a multi-pulse piston pump, in which at least two linear motors act as a drive and each linear motor acts on at least one piston and the linear motors are coordinated for pulsation control by means of a control unit.

Wird nur ein einziger konventioneller Linearmotor als Antrieb für eine Pumpe verwendet, muss dieser jedoch speziell für eine Pumpenart entworfen und gebaut werden. Zudem sind für Linearmotoren robuste Lager nötig, die hohe Anzugskräfte aufnehmen können. Eine Konstruktion eines Linearmotors ist nur rentabel, wenn dieser in einem Produkt mit hohen Stückzahlen eingesetzt wird. Der Linearmotor kann auch so ausgelegt werden, dass er angeforderte Nennwerte überschreitet. Pumpenspezifische oder überdimensionierte Linearmotoren sind generell jedoch sehr teuer.If only a single conventional linear motor is used to drive a pump, however, it must be specially designed and built for one type of pump. In addition, linear motors require robust bearings that can absorb high tightening forces. A linear motor design is only profitable if it is used in a high volume product. The linear motor can also be designed to exceed requested ratings. However, pump-specific or oversized linear motors are generally very expensive.

Der Erfindung liegt die Aufgabe zugrunde, einen pumpenspezifischen, aber dennoch günstigen Antrieb für Kraftstoffpumpen zu schaffen.The invention is based on the object of creating a pump-specific, but nevertheless inexpensive drive for fuel pumps.

Die Lösung der Aufgabe gelingt durch eine Pumpe, insbesondere Kraftstoffpumpe, mit wenigstens einem Arbeitsraum, in welchem ein Kolben mittels eines Antriebssystems den Arbeitsraum in einem Zylinder begrenzt und ein im Arbeitsraum befindliches Fluid, insbesondere Kraftstoff, mit Druck beaufschlagt, wobei das Antriebssystem wenigstens zwei Linearmotoren umfasst,
wobei die das Antriebssystem (3) bildenden Linearmotoren (la-le) elektrisch und/oder mechanisch parallel geschaltet sind, wobei eine mit dem Kolben (6) verbundene Kolbenstange (7) eine Kraft, insbesondere Vorschubkraft, des Antriebssystems (3) aus Linearmotoren bündelt.The object is achieved by a pump, in particular a fuel pump, with at least one working chamber in which a piston delimits the working chamber in a cylinder by means of a drive system and pressurizes a fluid, in particular fuel, located in the working chamber, the drive system at least two linear motors includes,
wherein the linear motors (la-le) forming the drive system (3) are connected electrically and / or mechanically in parallel, a piston rod (7) connected to the piston (6) bundling a force, in particular a feed force, of the drive system (3) composed of linear motors .

Linearmotoren werden vorzugsweise als Direktantriebe ausgeführt und zeichnen sich daher durch geringe Geräuschemissionen und eine hohe Leistungsdichte aus. Sie ermöglichen translatoriche Bewegungen ohne Getriebe, weshalb sie als verschleiß- und wartungsarm gelten. Ein Entfall des Getriebes schafft zudem die Voraussetzung für eine kompakte Bauweise.Linear motors are preferably designed as direct drives and are therefore characterized by low noise emissions and a high power density. They enable translatory movements without gears, which is why they are considered to be low-wear and low-maintenance. Eliminating the gearbox also creates the prerequisite for a compact design.

Eine Entwicklung nur eines, insbesondere eines großen, Linearmotors ist sehr teuer. Da sich die Entwicklung und Konstruktion eines Linearmotors erst ab einer gewissen Stückzahl lohnt - man spricht hierbei von einem Serienprodukt -, umfasst das Antriebssystem einer Pumpe, insbesondere einer Kraftstoffpumpe, erfindungsgemäß wenigstens zwei Linearmotoren. Die Linearmotoren sind vornehmlich baugleich und daher serientauglich. Dies bietet zudem den Vorteil, dass Linearmotoren als Ersatzteile auf Lager gehalten und im Bedarfsfall schnell ausgetauscht werden können.Developing only one, in particular a large, linear motor is very expensive. Since the development and construction of a linear motor is only worthwhile from a certain number of items - this is referred to as a series product - the drive system of a pump, in particular a fuel pump, according to the invention comprises at least two linear motors. The linear motors are primarily identical and therefore suitable for series production. This also has the advantage that linear motors can be kept in stock as spare parts and can be quickly exchanged if necessary.

Durch Variation einer Linearmotorenanzahl gelingt eine Skalierung von Vorschubkraft und Leistung. Somit können hohe Stückzahlen eines Linearmotors gefertigt werden, wobei verschiedene Anforderungen an Leistung und/oder Vorschubkraft bedient werden können. Durch die Variation der Linearmotorenanzahl kann zudem eine Redundanz ermöglicht werden, indem mehr Linearmotoren verbaut werden als eigentlich gefordert sind.By varying the number of linear motors, the feed force and power can be scaled. In this way, high quantities of a linear motor can be manufactured, whereby various requirements in terms of power and / or feed force can be met. By varying the number of linear motors, redundancy can also be made possible by installing more linear motors than are actually required.

In einer bevorzugten Ausführungsform der Erfindung treiben wenigstens 20 elektrisch und/oder mechanisch parallel geschaltete Linearmotoren die Kraftstoffpumpe an.In a preferred embodiment of the invention, at least 20 linear motors connected electrically and / or mechanically in parallel drive the fuel pump.

Ein besonders sicherer und zuverlässiger Betrieb, der zudem ein ausreichendes Maß an Skalierungsschritten ermöglicht, wird mit einem Antriebssystem aus 40 bis 50 Linearmotoren erreicht. Jedoch können auch 128 und mehr Linearmotoren ein Antriebssystem bilden.A particularly safe and reliable operation, which also enables a sufficient number of scaling steps, is achieved with a drive system made up of 40 to 50 linear motors. However, 128 or more linear motors can also form a drive system.

Bei kleineren Pumpen ist auch ein Antriebssystem mit einer geringeren Anzahl an Linearmotoren möglich. Eine Parallelschaltung mehrerer Linearmotoren dient auch einer Erhöhung der Vorschubkraft. Um eine Komplexität zu reduzieren, sind die das Antriebssystem bildendenden Linearmotoren vorzugsweise parallel auf einem Träger angeordnet.For smaller pumps, a drive system with a smaller number of linear motors is also possible. A parallel connection of several linear motors also serves to increase the feed force. In order to reduce complexity, the linear motors forming the drive system are preferably arranged in parallel on a carrier.

Vorteilhaft weist ein jeder Linearmotor eine mechanische Leistung zwischen 40 kW und 85 kW auf und stellt eine Vorschubkraft von bis zu 20 kN bereit.Each linear motor advantageously has a mechanical power between 40 kW and 85 kW and provides a feed force of up to 20 kN.

Das Antriebssystem weist vorzugsweise wenigstens ein Messsystem, wenigstens eine Steuereinheit zur Ansteuerung der Linearmotoren und wenigstens ein System zur Datenübertragung auf. Das Messsystem ermittelt vorzugsweise eine Position und/oder Geschwindigkeit der Linearmotoren auf ihrem jeweiligen Fahrweg. Die Position und/oder Geschwindigkeit können auch über eine Spannungsbeobachtung im Linearmotor, vorzugsweise geberlos, realisiert werden.The drive system preferably has at least one measuring system, at least one control unit for controlling the linear motors and at least one system for data transmission. The measuring system preferably determines a position and / or speed of the linear motors on their respective travel path. The position and / or speed can also be realized by monitoring the voltage in the linear motor, preferably without an encoder.

Vorteilhaft weist das Antriebssystem genau eine Steuereinheit auf. Die Steuereinheit steuert das Antriebssystem an. Das Antriebssystem, das wenigstens zwei Linearmotoren umfasst, wirkt hierbei wie nur ein Linearmotor.The drive system advantageously has precisely one control unit. The control unit controls the drive system. The drive system, which includes at least two linear motors, acts like just one linear motor.

Die Steuereinheit erteilt dem Antriebssystem Befehle, insbesondere bezüglich der Geschwindigkeit. Zudem realisiert die Steuereinheit die bereits erwähnte Skalierung, indem sie bei geringerem Kraftbedarf nur eine gewisse Anzahl an Linearmotoren ansteuert. Die Daten, die beispielsweise Informationen zu Position und Geschwindigkeit enthalten, sowie die Daten, die Befehle an die Linearmotoren enthalten, werden mittels eines Systems zur Datenübertragung zwischen dem jeweiligen Linearmotor und dem Messsystem bzw. der Steuereinheit übertragen. Auch zwischen dem Messsystem und der Steuereinheit ist vorteilhaft ein System zur Datenübertragung ausgeführt. Zur Datenübertragung können verschiedene Bussysteme oder auch Industrial Ethernet eingesetzt werden.The control unit issues commands to the drive system, in particular with regard to the speed. In addition, the control unit realizes the aforementioned scaling by controlling only a certain number of linear motors with a lower power requirement. The data, which for example contain information on position and speed, as well as the data which contain commands to the linear motors, are transmitted between the respective linear motor and the measuring system or the control unit by means of a data transmission system. A data transmission system is also advantageously implemented between the measuring system and the control unit. Various bus systems or Industrial Ethernet can be used for data transmission.

Durch die Erfindung und einen damit verbundenen Entfall von teuren und wartungsintensiven mechanischen Übertragungskomponenten wie Getriebe und/oder Nockenscheibe und/oder Kurbelwelle wird eine mechanische Umsetzung stark vereinfacht. Zudem werden eine Montage und ein Handling erleichtert, da weniger sowie auch kleinere Teile angebunden werden müssen. Linearmotoren können als Ersatzteile auf Lager gehalten werden.The invention and the associated elimination of expensive and maintenance-intensive mechanical transmission components such as gear and / or cam disk and / or crankshaft greatly simplify mechanical implementation. In addition, assembly and handling are made easier because fewer and smaller parts have to be connected. Linear motors can be kept in stock as spare parts.

Tritt in einem der das Antriebssystem bildenden Linearmotoren ein Fehler auf, woraufhin dieser nicht länger funktionstüchtig ist, kann die Pumpe weiterhin - wenn auch mit reduzierter Leistung - angetrieben werden, da die anderen Linearmotoren vom aufgetretenen Fehler nicht betroffen sind. Der fehlerbehaftete Linearmotor kann schnell und einfach ausgetauscht werden, was sich in einer hohen Maschinenverfügbarkeit positiv bemerkbar macht.If an error occurs in one of the linear motors forming the drive system, whereupon it is no longer functional, the pump can continue to be driven - albeit with reduced power - since the other linear motors are not affected by the error that has occurred. The faulty one The linear motor can be exchanged quickly and easily, which has a positive effect on the high machine availability.

Zudem bietet die Erfindung die Möglichkeit, durch Verbauen einer größeren Anzahl an Linearmotoren als benötigt eine Redundanz im Antriebssystem aus Linearmotoren zu verwirklichen, indem wenigstens ein redundanter Linearmotor in das erfindungsgemäßen Antriebssystem eingefügt wird.In addition, the invention offers the possibility of implementing a redundancy in the drive system of linear motors by installing a larger number of linear motors than required by inserting at least one redundant linear motor into the drive system according to the invention.

Für die Erfindung eignen sich sowohl Linearmotoren mit bewegtem Magneten, sogenannte Moving-Magnet-Linearmotoren, als auch Linearmotoren mit bewegter Spule, sogenannte Moving-Coil-Linearmotoren. Jedoch werden bevorzugt Linearmotoren mit bewegtem Magneten eingesetzt, da hierbei elektrische Zuführleitungen für den Linearmotor nicht bewegt werden müssen. Dies bietet den Vorteil, dass ein Fahrweg, auf welchem sich der Linearmotor bewegt, in einer beliebigen Länge ausgeführt sein kann.Both linear motors with moving magnets, so-called moving magnet linear motors, and linear motors with moving coils, so-called moving coil linear motors, are suitable for the invention. However, linear motors with moving magnets are preferably used, since electrical feed lines for the linear motor do not have to be moved. This offers the advantage that a travel path on which the linear motor moves can be designed in any length.

Vorzugsweise ist jedem das Antriebssystem bildenden Linearmotor wenigstens ein Umrichter, insbesondere genau ein Umrichter, zugeordnet, der den jeweiligen Linearmotor mit einem elektrischen Energieversorgungsnetz koppelt. Dies ermöglicht unter anderem ein einfaches und schnelles Austauschen des Linearmotors im Fehlerfall.Each linear motor forming the drive system is preferably assigned at least one converter, in particular precisely one converter, which couples the respective linear motor to an electrical power supply network. Among other things, this enables the linear motor to be exchanged quickly and easily in the event of a fault.

Erfindungsgemäss bündelt eine mit dem Kolben verbundene Kolbenstange eine raft, insbesondere eine Vorschubkraft, die die Linearmotoren aufbringen.According to the invention, a piston rod connected to the piston bundles a force, in particular a feed force, which the linear motors apply.

Für den Antrieb einer Pumpe sind hohe Kräfte erforderlich, die nach einer großen Leistung verlangen. Eine Herstellung, ein Transport und eine Installation von als Einzelmotoren ausgeführten Linearmotoren sind sehr teuer und aufwändig. Die Erfindung bietet den Vorteil, dass mittels des Antriebssystems die geforderten hohen Kräfte bewerkstelligt werden können, indem eine Kolbenstange die Kräfte mehrerer parallelgeschalteter, kleiner und serientauglicher Linearmotoren bündelt.To drive a pump, high forces are required, which demand great power. Production, transport and installation of linear motors designed as individual motors are very expensive and complex. The invention offers the advantage that the required high forces can be achieved by means of the drive system in that a piston rod carries the forces of several parallel-connected, bundles small linear motors suitable for series production.

Im Folgenden wird die Erfindung anhand eines Beispiels erläutert, bei dem die Figur ein Antriebssystem zum Antrieb einer Pumpe zeigt.The invention is explained below using an example in which the figure shows a drive system for driving a pump.

Die Figur zeigt ein Antriebssystem 3 aus fünf Linearmotoren 1a, 1b, 1c, 1d und 1e, die auf jeweils einem Fahrweg 2a, 2b, 2c, 2d und 2e vor- und zurückfahren können, um eine Pumpe 4, insbesondere eine Kraftstoffpumpe, anzutreiben. Die Linearmotoren sind parallel angeordnet und mechanisch derart verbunden, dass mittels einer Kolbenstange 7 die Kräfte der Linearmotoren 1a bis 1e gebündelt werden.The figure shows a drive system 3 made up of five linear motors 1a, 1b, 1c, 1d and 1e, each of which can move back and forth on a route 2a, 2b, 2c, 2d and 2e in order to drive a pump 4, in particular a fuel pump. The linear motors are arranged in parallel and mechanically connected in such a way that the forces of the linear motors 1a to 1e are bundled by means of a piston rod 7.

Ein jeder Linearmotor 1a bis 1e ist jeweils mit einem Umrichter 30a, 30b, 30c, 30d und 30e an ein elektrisches Energieversorgungsnetz 40 gekoppelt. Die Linearmotoren 1a bis 1e sind über elektrische Energieversorgungsleitungen 31a, 31b, 31c, 31d und 31e mit dem jeweils zugehörigen Umrichter 30a bis 30e verbunden. Die Umrichter 30a bis 30e sind über weitere elektrische Energieversorgungsleitungen 32a, 32b, 32c, 32d und 32e mit dem elektrischen Energieversorgungsnetz 40 verbunden.Each linear motor 1a to 1e is coupled to an electrical power supply network 40 by means of a converter 30a, 30b, 30c, 30d and 30e. The linear motors 1a to 1e are connected to the respective associated converter 30a to 30e via electrical power supply lines 31a, 31b, 31c, 31d and 31e. The converters 30a to 30e are connected to the electrical energy supply network 40 via further electrical energy supply lines 32a, 32b, 32c, 32d and 32e.

Die Kraft der Linearmotoren 1a bis 1e wird mittels einer Kolbenstange 7 gebündelt. Vorteilhaft bewegen sich die einzelnen Linearmotoren 1a bis 1e mit der gleichen Geschwindigkeit. Die Kolbenstange 7 bewegt auf diese Weise einen Kolben 6, der in einem Zylinder einer Pumpe 4 einen Arbeitsraum 5 begrenzt.The power of the linear motors 1a to 1e is bundled by means of a piston rod 7. The individual linear motors 1a to 1e advantageously move at the same speed. In this way, the piston rod 7 moves a piston 6 which delimits a working space 5 in a cylinder of a pump 4.

Im Arbeitsraum 5 befindliches Fluid, insbesondere Kraftstoff wie Öl oder Gas, wird dadurch mit Druck beaufschlagt. Hierzu wird in einem beispielhaften Ablauf Kraftstoff durch ein vorzugsweise von der Steuereinheit 21 über ein System zur Datenübertragung 25 angesteuertes Einlassventil 11 in den Arbeitsraum 5 eingezogen, indem das Antriebssystem 3 aus Linearmotoren 1a bis 1e - und somit jeder einzelne Linearmotor 1a bis 1e - von der Steuereinheit 21 den Befehl erhält, an ein hinteres, der Pumpe 4 abgewandtes Ende des jeweiligen Fahrwegs 2a bis 2e zu fahren. Der Arbeitsraum 5 erlangt dadurch seine maximale Größe und ein entstehender Unterdruck im Arbeitsraum 5 zieht den Kraftstoff über das Einlassventil 11 ein.Fluid located in the working space 5, in particular fuel such as oil or gas, is thereby subjected to pressure. For this purpose, in an exemplary sequence, fuel is drawn into the working chamber 5 through an inlet valve 11, preferably activated by the control unit 21 via a data transmission system 25, by the drive system 3 consisting of linear motors 1a to 1e - and thus each individual linear motor 1a to 1e - receives the command from the control unit 21 to drive to a rear end of the respective travel path 2a to 2e facing away from the pump 4. The working space 5 thereby attains its maximum size and a negative pressure that occurs in the working space 5 draws the fuel in via the inlet valve 11.

Ein Messsystem 20 erkennt, wann ein jeder Linearmotor 1a bis 1e eine Endposition erreicht hat, woraufhin die Steuereinheit 21 die Linearmotoren 1a bis 1e anhält. Das Messsystem 20 ist über ein System zur Datenübertragung 26 mit den Linearmotoren 1a bis 1e verbunden. Das Messsystem 20 erfasst vorteilhaft zudem eine Geschwindigkeit und Position eines jeden Linearmotors 1a bis 1e und kann diese Daten an die Steuereinheit 21 über ein System zur Datenübertragung zwischen Steuereinheit und Messsystem 27 übermitteln. Die Steuereinheit 21 hat daher die Möglichkeit zu reagieren, indem sie beispielsweise die Linearmotoren 1a bis 1e abbremst oder beschleunigt.A measuring system 20 detects when each linear motor 1a to 1e has reached an end position, whereupon the control unit 21 stops the linear motors 1a to 1e. The measuring system 20 is connected to the linear motors 1a to 1e via a data transmission system 26. The measuring system 20 advantageously also detects a speed and position of each linear motor 1a to 1e and can transmit this data to the control unit 21 via a system for data transmission between the control unit and the measuring system 27. The control unit 21 therefore has the possibility of reacting, for example by braking or accelerating the linear motors 1a to 1e.

Vorzugsweise verschließt die Steuereinheit 21 bei Erreichen der Endposition der Linearmotoren 1a bis 1e sowohl das Einlassventil 11 als auch das Auslassventil 10. Hierzu ist ein optionales System zur Datenübertragung zwischen Steuereinheit 21 und Ventilen 29 verfügbar.When the linear motors 1a to 1e reach the end position, the control unit 21 preferably closes both the inlet valve 11 and the outlet valve 10. An optional system for data transmission between the control unit 21 and valves 29 is available for this purpose.

Das Antriebssystem 3 aus Linearmotoren 1a bis 1e wird von der Steuereinheit 21 veranlasst, in Richtung eines vorderen, der Pumpe zugewandten Endes des jeweiligen Fahrwegs 2a bis 2e zu fahren. Dadurch wird der im Arbeitsraum 5 befindliche Kraftstoff mit Druck beaufschlagt. Ist der Druck groß genug, öffnet die Steuereinheit 21 das Auslassventil 10. Vorteilhaft wird eine Höhe des Drucks mittels des Messsystems 20 über ein optionales System zur Datenübertragung zwischen Messsystem und Ventilen 28 erfasst.The drive system 3 made up of linear motors 1a to 1e is caused by the control unit 21 to move in the direction of a front end of the respective travel path 2a to 2e facing the pump. As a result, the fuel in the working chamber 5 is pressurized. If the pressure is high enough, the control unit 21 opens the outlet valve 10. A level of the pressure is advantageously recorded by means of the measuring system 20 via an optional system for data transmission between the measuring system and the valves 28.

Die Steuereinheit 21 und das Messsystem 20 können getrennte Recheneinheiten oder eine gemeinsame Recheneinheit aufweisen. Die Systeme zur Datenübertragung 25, 26, 27, 28 und 29 können mittels Leitungen oder auch drahtlos verbunden sein.The control unit 21 and the measuring system 20 can have separate processing units or a common processing unit. The systems for data transmission 25, 26, 27, 28 and 29 can be connected by means of lines or wirelessly.

Das in der Figur beispielhaft gezeigte Antriebssystem 3 aus Linearmotoren weist nur fünf Linearmotoren 1a bis 1e auf. Erfindungsgemäß kann je nach Anwendungsgebiet jedoch auch eine größere oder kleinere Anzahl an Linearmotoren ein Antriebssystem aus Linearmotoren bilden.The drive system 3 of linear motors shown by way of example in the figure has only five linear motors 1a to 1e. According to the invention, however, depending on the area of application, a larger or smaller number of linear motors can also form a drive system made up of linear motors.

Claims (7)

  1. Pump (4), in particular fuel pump, having at least one working chamber (5), in which a piston (6), by means of a drive system, bounds the working chamber (5) in a cylinder and pressurizes a fluid, in particular fuel, present in the working chamber (5), wherein the drive system (3) comprises at least two linear motors (1a -1e),
    characterised in that the linear motors (la - 1e) forming the drive system (3) are connected electrically and/or mechanically in parallel, wherein a piston rod (7) connected to the piston (6) bundles a force, in particular feed force, of the drive system (3) comprising linear motors (1a - 1e).
  2. Pump (4) according to claim 1, wherein the drive system (3) has at least one measuring system (20), preferably for determining the position and/or speed, at least one control unit (21) for activating the linear motors (la-le) and at least one system for data transmission (25, 26, 27).
  3. Pump (4) according to one of the preceding claims, wherein the linear motors (la-le) forming the drive system (3) are arranged in parallel on a support.
  4. Pump (4) according to one of the preceding claims, wherein the linear motors (la-le) forming the drive system (3) are embodied in each case as linear motors with a moving magnet.
  5. Pump (4) according to one of the preceding claims, wherein at least one converter (30a-30e) is assigned to each linear motor (la -1e) forming the drive system (3).
  6. Pump (4) according to one of the preceding claims, wherein the drive system (3) comprising linear motors (la-le) has at least 20 and at most 128 linear motors.
  7. Pump (4) according to one of the preceding claims, wherein the linear motors forming the drive system (3) comprising linear motors (la-le) are of the same construction.
EP18734457.7A 2017-07-11 2018-06-13 Drive of a pump Active EP3622169B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17180757.1A EP3428441A1 (en) 2017-07-11 2017-07-11 Drive for a pump
PCT/EP2018/065599 WO2019011561A1 (en) 2017-07-11 2018-06-13 Drive of a pump

Publications (2)

Publication Number Publication Date
EP3622169A1 EP3622169A1 (en) 2020-03-18
EP3622169B1 true EP3622169B1 (en) 2021-06-02

Family

ID=59325167

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17180757.1A Withdrawn EP3428441A1 (en) 2017-07-11 2017-07-11 Drive for a pump
EP18734457.7A Active EP3622169B1 (en) 2017-07-11 2018-06-13 Drive of a pump

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17180757.1A Withdrawn EP3428441A1 (en) 2017-07-11 2017-07-11 Drive for a pump

Country Status (4)

Country Link
US (1) US11085409B2 (en)
EP (2) EP3428441A1 (en)
CN (1) CN110869604A (en)
WO (1) WO2019011561A1 (en)

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6295972B1 (en) * 2000-03-30 2001-10-02 Bombardier Motor Corporation Of America Fuel delivery using multiple fluid delivery assemblies per combustion chamber
US20030085308A1 (en) * 2001-11-08 2003-05-08 Parrish Scott E. Two-piece flow-homogenizing fuel injection nozzle and system and method incorporating same
CN2740803Y (en) 2004-10-10 2005-11-16 西南石油学院 Reciprocating pump driven by linear electric motor
US7485977B2 (en) * 2006-01-06 2009-02-03 Aerodyne Research, Inc. Power generating system
US7332825B2 (en) * 2006-01-06 2008-02-19 Aerodyne Research, Inc. System and method for controlling a power generating system
EP1987251B1 (en) 2006-02-02 2017-03-08 LG Electronics, Inc. Control apparatus for linear compressor
DE102007038529A1 (en) 2007-08-16 2009-02-19 Robert Bosch Gmbh High-pressure fuel pump i.e. radial piston pump, for use in internal-combustion engine, has working space in which fuel is loaded with high pressure, where pump is coupled with linear motor that is drivingly coupled with pump piston
DE102008036528A1 (en) * 2008-08-06 2010-02-11 Bentec Gmbh Drilling & Oilfield Systems Method for operating a multi-pulse piston pump, multi-pulse piston pump and production of such
US9574556B1 (en) * 2008-11-20 2017-02-21 Aerodyne Research, Inc. Free piston pump and miniature internal combustion engine
CN102094783B (en) 2010-12-21 2013-07-17 李浩宇 Electric double-liquid chemical grouting pump
CN102587090A (en) 2012-03-22 2012-07-18 无锡小天鹅股份有限公司 Putting device capable of overcoming viscosity change of detergent and control method thereof
CN102953883B (en) * 2012-05-04 2015-02-04 浙江福爱电子有限公司 Energy-storage type high-pressure electronic fuel pump, fuel supply device and application method thereof
DE102012220068A1 (en) * 2012-11-05 2014-05-08 Robert Bosch Gmbh Electromagnetic linear motor pump for reducing agent dosing system for internal combustion engine, has linear motor-driven pumps that are used as feed pump and scavenger pump, and are combined to form a linear motor pump assembly
CN203463248U (en) 2013-08-29 2014-03-05 宝鸡石油机械有限责任公司 Double-acting multi-cylinder mud pump directly driven by linear motors
DE102014202937A1 (en) 2014-02-18 2015-08-20 Robert Bosch Gmbh Pump driven by a linear drive
CN105386956A (en) 2014-09-06 2016-03-09 徐建宁 Free piston hydraulic pump
JP6193291B2 (en) * 2015-04-13 2017-09-06 三井造船株式会社 Fuel supply device
US10550676B2 (en) * 2015-06-01 2020-02-04 Baker Hughes Incorporated Systems and methods for determining proper phase rotation in downhole linear motors
CN106609705A (en) * 2015-10-21 2017-05-03 徐建宁 Magnetic return stroke internal combustion engine
CN106609704A (en) 2015-10-21 2017-05-03 徐建宁 Electro-hydraulic engine
CN105971864B (en) * 2016-07-05 2017-09-12 池泉 Pump group drive system
CN106809705A (en) 2016-12-30 2017-06-09 邵羽骏 A kind of tube rolling device of intelligent power control
CN108971864A (en) 2018-09-13 2018-12-11 南通通达矽钢冲压科技有限公司 A kind of elevator motor punching welding tooling

Also Published As

Publication number Publication date
US11085409B2 (en) 2021-08-10
WO2019011561A1 (en) 2019-01-17
US20200378349A1 (en) 2020-12-03
EP3428441A1 (en) 2019-01-16
EP3622169A1 (en) 2020-03-18
CN110869604A (en) 2020-03-06

Similar Documents

Publication Publication Date Title
EP2503160B1 (en) Hydraulic drive system
EP2267317B1 (en) Hydraulic system
DE102011078241B3 (en) Hydraulic unit, has valve connecting flow-reversible pump with connection line of another flow-reversible pump before switching another valve in load drive state, where hydraulic fluid is not conveyed to piston chamber in load drive state
DE102014218885A1 (en) Hydraulic drive with fast lift and load stroke
DE102016113882A1 (en) Electro-hydrostatic drive system
EP2846942B1 (en) Hydraulic extrusion press and method for operating a hydraulic extrusion press
EP3098457A1 (en) Hydrostatic linear actuator and assembly with hydrostatic linear actuators
DE102018214427A1 (en) Hydraulic system for a double clutch transmission
DE102015212101B4 (en) Hydraulic control for an actuator in a vehicle transmission
EP3622169B1 (en) Drive of a pump
DE102004058261A1 (en) Oil pump, has low pressure oil cycle provided with one of pump stages for cooling of motor vehicle gearbox with cooling oil, where oil from low pressure oil cycle is taken out for prefilling clutch with help of quantity switching mechanism
DE102011118282A1 (en) Hydraulic pump test stand for hydraulic pump, has electronic feedback controller, which adjusts angle of hydraulic motor as control variable considering circuit temperature of hydraulic fluid
DE102021201895A1 (en) Method for operating a variable-speed electro-hydraulic pump, computing unit and variable-speed electro-hydraulic pump
DE102011105923A1 (en) Hydraulic drive system, such as mobile working machines, comprises two hydraulic pumps, where latter hydraulic pump has fluid inlet and fluid outlet, where fluid inlet is connected with customer over return pipeline
DE102010020690A1 (en) Hydraulic drive system, has hydraulic machine operated as pump and motor along rotary direction, and another hydraulic machine operated as motor and pump along two rotary directions
EP3443229B1 (en) Radial forging machine with hydraulic cylinder
WO2005075852A2 (en) Actuator, especially for a chassis
DE102010046217A1 (en) Pressure control with DDU / DVR units using engine cycles
DE102020004389A1 (en) Hydraulic system for a dual clutch transmission
EP3091230B1 (en) Hydrostatic piston machine
DE102019004338A1 (en) HYDRAULLIC CYLINDER DRIVE AND HYDRAULLIC PRESS DRIVE AND HYDRAULIC DRIVE PROCESS
DE112015003700T5 (en) High pressure fuel pump for a fuel system
AT519817A1 (en) hydraulic system
DE102013007668B4 (en) Hydraulic drive system for two cylinders arranged approximately parallel
DE102009026609A1 (en) Control method of a digital hydraulic controller

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20191211

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20210210

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1398665

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210615

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502018005546

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210902

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20210602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210902

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210903

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211004

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502018005546

Country of ref document: DE

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210613

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210613

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

26N No opposition filed

Effective date: 20220303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20220613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20180613

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230619

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230627

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230818

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210602