EP1299622B1 - Druckwellengenerator - Google Patents

Druckwellengenerator Download PDF

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Publication number
EP1299622B1
EP1299622B1 EP01950164A EP01950164A EP1299622B1 EP 1299622 B1 EP1299622 B1 EP 1299622B1 EP 01950164 A EP01950164 A EP 01950164A EP 01950164 A EP01950164 A EP 01950164A EP 1299622 B1 EP1299622 B1 EP 1299622B1
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EP
European Patent Office
Prior art keywords
valves
pulse generator
pressure pulse
pressure
valve
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Expired - Lifetime
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EP01950164A
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English (en)
French (fr)
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EP1299622A1 (de
Inventor
Mats Hedman
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Cargine Engineering AB
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Cargine Engineering AB
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Priority claimed from SE0002597A external-priority patent/SE520993C2/sv
Priority claimed from SE0003473A external-priority patent/SE0003473D0/xx
Application filed by Cargine Engineering AB filed Critical Cargine Engineering AB
Publication of EP1299622A1 publication Critical patent/EP1299622A1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L33/00—Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution
    • F01L33/04—Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution oscillatory
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/031—Electromagnets

Definitions

  • the present invention relates to a pressure pulse generator that comprises a circuit filled with pressure fluid, and at least one communication channel that is connected to the circuit and via which the pressure fluid can flow into and out of the circuit, with a pressure pulse generator element and a method of controlling the pressure pulse generator, as well as use of the pressure pulse generator for operating a valve in an internal combustion engine (see US-A-5058857 ).
  • the invention is applicable to all types of technical areas in which pressure pulses are to be generated. In particular, it is applicable to applications that poses high requirements on the speed with which the pulses can be generated and on the duration period of the individual pulses.
  • Internal combustion engines define such a field in which pressure pulses can be used in order to control and operate the movement of the valves of the combustion engine instead of operating and controlling the valve movements by means of a conventional transmission of the piston movement of the engine to the valves via a cam shaft.
  • An obstacle to the accomplishing of such a pressure pulse generator may be the difficulty to achieve sufficiently rapid opening/closing movement of the valve or valves that is/ are required in such a pressure pulse generator.
  • valves are often replaced by ports in modern two-stroke engine constructions, but that the present invention results in the possibility of using valve technology in two-stroke engines in a way corresponding to that of four-stroke engines.
  • An object of the present invention is to provide a pressure pulse generator that is able to deliver pressure pulses of short duration and of variable length with high time precision and rapidity in order to effect any object.
  • a further object is to provide a method that makes it possible to deliver pressure pulses with high time precision and rapidity.
  • the object of the invention is achieved by means of a pressure pulse generator in accordance with claim 1.
  • valves of the pair of valves are electrically controlled, the opening and closing of the valves can be controlled with high precision.
  • the movements of the valves included in a pair of valves can be co-ordinated in such a way that they occur somewhat displaced in time, whereby reduced opening/closing times can be obtained.
  • valves of the pressure pulse generator are preferably slide valves arranged to be displaced cross-wise a channel in the pressure fluid circuit that they are provided to close or open for passage of the pressure fluid.
  • the valves of the pair of valves are, preferably, electromagnetically controlled, as such valves have the advantage of being able to operate both with high speed and precision.
  • valves of each pair of valves are interconnected by two separate, parallel channels that lead from a first valve of the pair of valves to a second valve of the pair of valves, each valve being arranged to execute a closing or opening of each channel.
  • the valves of the pair of valves are arranged to occupy a first position in which they close a first channel of said channels and open a second one of said channels, and a second position in which they open the first channel and close the second channel.
  • the first valve of each respective pair of valves is arranged to move towards and occupy its first position at the same time as the second valve moves towards and occupies its second position.
  • the channels are branches of a single pressure fluid conduit in the pressure fluid circuit, said branches being arranged upstream and downstream each individual pair of valves.
  • the pressure pulse generator comprises means for controlling the transition of the valves between their first and second positions, said control means being arranged to mutually displace, in time, the transition between the first and second position for the valves of the respective pair of valves.
  • control means comprise an electronic device arranged to control the activation or deactivation of one or more electromagnets for the purpose of affecting and moving the valves of the pair of valves, i.e. the valve bodies (slides), between their closing and opening positions, respectively.
  • control means may be arranged to receive input from, for instance, sensors or the like and adjust the time displacement based on such input.
  • the means may also comprise a program sequence in a computer program for controlling and emitting control signals to the valves of the pressure pulse generator, or, more precisely, to the electromagnets that operate the movements of the valves.
  • the pressure pulse generator also comprises a cylinder unit and a piston that is displaceably arranged in the cylinder unit, said at least one communication channel being connected to the cylinder unit in such a way that the pressure fluid in the circuit can flow into and out of the interior of the cylinder through said communication channel in order to accomplish a displacement of the piston in the cylinder unit.
  • a piston return means for example, compression spring, is preferably provided in order to apply a pressure on the piston in a direction opposite to the one in which the piston is displaced when a pressure pulse is generated as a pressure fluid with a higher pressure is permitted to pass the first, upstream pair of valves.
  • the piston return means is permitted to contribute to a return of the piston to a start position by letting the second, downstream pair of valves be opened for pressure fluid passage during a sequence following the flow sequence described above.
  • the movement of the piston can, in its turn, be used for controlling or operating any mechanical device.
  • the piston is connected to a valve of a combustion engine and the movement of the piston is transmitted to an opening or closing movement of the valve of the combustion engine.
  • the control means mentioned above thereby preferably control the activation and deactivation of said electromagnets based on the position of a crank shaft of the combustion engine.
  • the invention also relates to the initially defined method for controlling a pressure pulse generator, said method being in accordance with claim 12.
  • valves are arranged in pairs and that the opening and closing of the individual valves is performed in accordance with a predetermined sequence may be taken advantage of in order to shorten the time required for the opening and subsequent closing of a pair of valves for the passage of a pulse of the pressure fluid, as in comparison to when only individual valves are arranged instead of said pair of valves.
  • the pair of valves comprise two active valves or valve bodies that are moved in opposite directions in order to simultaneously, during a short moment, permit passage of a pressure fluid through one or more parallel channels that form the portion of the pressure fluid circuit conduit where the valves are arranged.
  • the valves of the first pair of valves are controlled, during a first period, to open for a flow of the pressure fluid in a direction out of the circuit through the communication channel, while at least one of the valves of the second pair of valves is kept closed in order to prevent fluid from passing the second pair of valves.
  • the valves of the second pair of valves are opened for permitting a flow of the pressure fluid back to the circuit via the communication channel and to pass at least one of these valves, while at the same time at least one of the valves of the first pair of valves is kept closed in order to prevent fluid from passing the first pair of valves. In that way, a pressure pulse is permitted to affect any object or any mechanical device to perform a back and forth movement.
  • valves of each pair of valves are connected by two separate, parallel channels that lead from a first valve of the pair of valves to the second valve of the pair of valves, and a first one of the pair of valves is opened for passage of fluid through a first one of these channels and closed for passage of fluid in the second channel while, at the same time, the second valve is opened for fluid passage in the second channel but is kept closed for preventing passage of fluid in the first channel.
  • the change of the positions of the two valves is preferably controlled in such a way that the valves, simultaneously during a short period, hold one of the two channels open for passage of the pressure fluid.
  • the valves preferably electromagnetically controlled slide valves, thereby move in opposite directions, said period can be made very short.
  • the moment at which an electrical signal is given for activation of a first electromagnet, that operates a displacement of the first one of the valves is controlled in relation to the moment at which a second electrical signal is emitted for activation of a second electromagnet that operates a displacement of the second valve, based on the requested length of time of the pressure fluid pulse that is thereby generated via the open channel.
  • Fig. 1 is a schematic cross-section which shows a pressure pulse generator according to the invention, the pressure pulse generator being connected to a valve 1 in a combustion engine.
  • the valve 1 may be an intake or exhaust valve.
  • the valve body itself which is provided to be bearing on a valve seat (not shown) when in its closed position, is connected via a shaft 3 to a piston 4 that is arranged in a second cylinder 5, which, preferably, is arranged outside and adjacent the cylinder 2.
  • the pressure pulse generator comprises a first and a second pressure pulse generator element 6, 7.
  • Each such element 6, 7 comprises a first and a second valve 8, 9 and 10, 11, respectively, and is arranged in a pressure fluid circuit 12.
  • the pressure fluid circuit is constituted by one or more conduits for conducting and transporting a pressure fluid therein.
  • the pressure fluid circuit 12 is generally closed, and a pressure generating member 14 is arranged to generate a pressure of a pressure fluid accommodated in the circuit.
  • the pressure generating member 14 may be a compressor or any other type of pump member suitable for this objective.
  • the pressure fluid is flowing from the high pressure side of the pressure generating member, where pressure P1 exists, to the low pressure side thereof, where pressure P2 exists, and P1>P2.
  • P2 may be atmospheric pressure, and the circuit may, if requested, be open downstream the second pressure pulse generating element 7.
  • the invention also includes the possibility of keeping the circuit 12 open or closed depending on outer factors such as the rpm or load of the combustion engine.
  • the pressure fluid is a gas or a gas mixture.
  • the pressure fluid is at least to a major part comprised by air.
  • the pressure pulse generator thereby defines a pneumatic pressure pulse generator.
  • the circuit 12 Via a communication channel 15, the circuit 12 is connected to a chamber 13 inside the cylinder 5, said chamber being provided on the opposite side of the piston 4 in relation to the shaft 3.
  • the pressure pulse from the circuit that results in pressure fluid being delivered to the chamber 13 will result in a displacement of the piston 4 and, accordingly of the valve 1.
  • Such a pulse is created when the positions of the valves 8, 9 of the first pressure pulse generator element 6 are changed, as will be described more in detail later.
  • Each pressure pulse generator element 6, 7 comprises a first and a second channel 16, 17, said channels being arranged in parallel and formed by a local branching of the main conduit of the circuit 12 at the site of the pressure pulse generating element.
  • Each pair of valves is arranged at the region of the parallel channels 16, 17, and each individual valve is arranged to permit the passage of pressure fluid through one of the channels while at the same time preventing passage through the other one of said channels.
  • the valves or valve bodies 8-11 comprise a magnetic material and are controlled by means of electromagnets that are suggested in Fig. 1 and have been given reference numerals 18-21.
  • the valve bodies are displaceably arranged in a direction cross-wise to the channels 1.
  • they are designed as discs that comprise at least one hole 22 that, in a first position of the valve is positioned in front of and opens for pressure fluid passage in a first channel of said channels 16, 17, and, in a second position, closes for preventing flow through the first channel 16 but being positioned in front of and opening for passage of a pressure fluid in the second of said channels 16, 17.
  • the valves are bistable, which means that they will rest in the first or second position if there is no activation of any of the electromagnets 18-21.
  • One valve or valve body 8-11 of a pair of valves 6, 7 is arranged to move towards and occupy the first position while the other valve moves towards and occupies a second position.
  • a pressure pulse is generated as the positions of the two valves 8, 9 and 10, 11 respectively are changed such that, during a short moment, a passage of fluid is permitted through one of the channels 16, 17.
  • the duration of the pressure pulse can be controlled to be longer than if no simultaneous opening of any one of the channels is performed during the change.
  • the amount of pressure fluid delivered is, apart from the amount due to any simultaneous opening of any channel, also depending on the volume in each channel between the valve bodies.
  • the invention includes a time displacement of the initiation of the movements of the valve bodies 8-11 in order to control the pulse length.
  • the time displacement is based on any suitable operation parameter of the engine, such as the rotational speed of the engine.
  • the volume of the channels is minimised to enable a pressure fluid consumption as low as possible.
  • the pulse lengths can also be varied by means of the inventive pressure pulse generator through a mutual displacement of the moment at which the two valves 8-11 of a pair of valves are activated.
  • the activation is performed by emitting a signal that initiates the magnetising of one of the electromagnets 18-21, thereby accomplishing a displacement of the valve body 8-11.
  • the signal can be emitted from any control means, and, in this case, it is based on the position of a crank case belonging to the combustion engine.
  • a means 23 for returning the piston 4 to its upper position or start position is provided in accordance with the invention.
  • the displacement of the piston 4 requires that the pressure of the pulse of fluid generated through the change of positions of the valve bodies 8, 9 of the first pressure generating element 6 is sufficient in order to make the force that is applied by the pressure fluid on the side of the piston 4 that is directed towards the chamber 13 exceed the force applied by the piston return means 23 on the piston 4 in an opposite direction.
  • the piston return means 23 is, in Fig. 1 , a compression spring but may comprise a gas accommodated in the chamber 24 in the cylinder 5 arranged on the opposite side of the piston 4 with regard to the chamber 13.
  • the cylinder 5 should, in such a case, be connected to a gas container or the like in order to enable a variable pressurising of the gas contained in the cylinder 5.
  • FIG. 4 Another possible solution, schematically shown in Fig. 4 , includes a second pressure pulse generator, generally represented by the reference numeral 25 and corresponding to the first pressure pulse generator that has been described above, and connected to the chamber 24 and provided to generate pressure pulses for returning the piston in connection to the release of the pressure fluid from the first chamber 13 through activation or an opening of the second pair of pressure valves 10, 11.
  • a downstream pair of valves of this second pressure pulse generator is opened for the purpose of releasing the pressure fluid from the chamber 24 while the first pressure pulse generator element 6 is activated for letting in a flow of pressure fluid into the first chamber 13.
  • FIG. 5 and 6 A further embodiment of the invention is shown in Figs. 5 and 6 .
  • This embodiment is a simplification of the embodiment described earlier in the respect that the valve bodies or discs 8, 9 of each pair of valves 6, 7 are interconnected with one single channel 26.
  • the valve bodies 8, 9 are arranged to operate principally in the same way as has been described in the first embodiment, that is, to occupy opposite, closed and opened positions with respect to passage of fluid through the channel 26.
  • This more simple embodiment results in a dissymmetry in pulse lengths. If control signals for position change of the slide valves 8 and 9 are delivered with the same frequency, a dissymmetry that decreases with a decreased distance between the valve bodies 8, 9 is obtained. The resulting difference may be largely compensated by means of measures taken in the program software responsible for the frequency control.
  • the invention includes that the electromagnetic operation of the valve bodies 8-11 can be supplemented with any further operation.
  • a pilot valve may be arranged in order to control a pressure fluid, such as air, to contribute to the operation/position change of the valve bodies between the stabile first and second positions, and also in order to keep the valve bodies in these positions.
  • the pilot valve is then preferably operatively connected to the same control means as those that control the electromagnets 18-21 of the pressure pulse generator.
  • the invention also comprises the possibility of controlling the size of the pressure pulse to control the length of displacement of the valve of a combustion engine based on any operative parameter of the engine, preferably the load of the engine.
  • the invention comprises and also enables transition between two-stroke operation and four-stroke operation of an internal combustion engine during operation thereof through a control of the valve movements by means of the inventive pressure pulse generator and/or one or more of the inventive pressure pulse generator elements.
  • the pressure return means 23 may be arranged on any side of the piston 4, and that the magnet members 18-21 that are used may be of different designs and that the number thereof and the position thereof can differ from what has been shown above without thereby going beyond the invention.
  • the 50% reduction can be achieved by associating each valve body 8, 9 to one electromagnet in order to be activated as a result of an electric signal.
  • the other electromagnet can be replaced by a return spring, for example made of metal or designed as a gas spring.
  • the slide valve is still bistable, as it occupies one of two possible positions in order to enable the generation of pressure pulse when the valve bodies 8, 9 are connected in series as suggested by the invention.
  • the pressure pulse generator and the pressure pulse generator element according to the invention preferably can be used in a fuel injection system, more precisely direct injection systems, and for direct injection of any other fuel, for example water or steam, in engines and other devices.
  • the pressure fluid may, accordingly, be a liquid, such as hydraulic oil or water, as well as air or a gas, depending on the application field.
  • valves in the two pairs of valves, upstream as well as downstream the communication channel are active valves, that is, magnetically activatable valves, and should not be confused with passive valves such as one-way valves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Surgical Instruments (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Claims (17)

  1. Druckimpulsgenerator, der einen Druckfluidkreislauf (12) mit einer Hochdruckseite und einer Niederdruckseite und ein Druckimpulsgeneratorelement (6, 7) aufweist, das im Druckfluidkreislauf (12) angeordnet ist, wobei das Element ein Paar elektrisch gesteuerter Ventile (8,9,10,11) aufweist, das ein erstes Ventil (8,10) und ein zweites Ventil (9,11) aufweist, wobei das erste Ventil (8,10) und das zweite Ventil (9,11) mittels eines einzigen Kanals (26) oder zweier paralleler Kanäle (16,17) verbunden sind, die vom ersten Ventil (8,10) zum zweiten Ventil (9,11) des Ventilpaars führen, und jedes Ventil (8,9,10,11) eingerichtet ist, ein Schließen und Öffnen des Kanals (26) oder jedes Kanals des Kanalpaars (16,17) durchzuführen, wobei die ersten und zweiten Ventile (8,9,10,11) eingerichtet sind, jeweils entgegengesetzte geschlossene und offene Stellungen hinsichtlich des einzelnen Kanals (26) oder jedem des Paares der Kanäle (16,17) einzunehmen und durch eine Änderung der Stellung der Ventile zwischen den offenen und geschlossenen Stellungen einen Druckimpuls im Druckfluidkreislauf (12) zu erzeugen, dadurch gekennzeichnet, daß der Druckimpulsgenerator eine elektronische Vorrichtung aufweist, die eingerichtet ist, die Aktivierung oder Deaktivierung eines oder mehrerer Elektromagnete zum Zweck der Beeinflussung und des Bewegens der Ventile (8,9,10,11) des Ventilpaars zwischen ihren schließenden bzw. öffnenden Stellungen so zu steuern, daß der Moment, an dem ein elektrisches Signal zur Aktivierung eines ersten Elektromagneten abgegeben wird, das eine Verstellung des ersten (8,10) der Ventile (8,9,10,11) bewirkt, in Beziehung zu dem Moment, an dem ein zweites elektrisches Signal zur Aktivierung eines zweiten Elektromagneten abgegeben wird, das eine Verstellung des zweiten Ventils (9, 11) bewirkt, beruhend auf der angeforderten Dauer des Druckfluidimpulses gesteuert wird, der dadurch über den offenen Kanal (26; 16, 17) erzeugt wird.
  2. Druckimpulsgenerator nach Anspruch 1, dadurch gekennzeichnet, daß die Ventile (8,9,10,11) elektromagnetisch gesteuerte Schieber sind.
  3. Druckimpulsgenerator nach einem der Ansprüche 1-2, der aufweist:
    - mindestens einen Verbindungskanal (15), der mit dem Druckfluidkreislauf (12) verbunden ist und durch den das Druckfluid in und aus dem Kreislauf (12) strömen kann, dadurch gekennzeichnet, daß
    - er ein erstes Druckimpulsgeneratorelement (6) und ein zweites Druckimpulsgeneratorelement (7) aufweist, die in Reihe geschaltet sind, und
    - daß das erste Druckimpulsgeneratorelement (6) im Kreislauf (12) stromaufwärts des mindestens einen Verbindungskanals (15) angeordnet ist, und
    - daß das zweite Druckimpulsgeneratorelement (7) im Kreislauf (12) stromabwärts des mindestens einen Verbindungskanals (15) angeordnet ist.
  4. Druckimpulsgenerator nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß jedes der Ventile (8,9,10,11) bistabil ist.
  5. Druckimpulsgenerator nach Anspruch 4, dadurch gekennzeichnet, daß die elektronische Vorrichtung eingerichtet ist, den Übergang der Ventile (8,9,10,11) zwischen ihren ersten und zweiten Stellungen zu steuern und den Moment des Übergangs zwischen den ersten und zweiten Stellungen für die Ventile (8,9,10,11) des jeweiligen Ventilpaars zu verschieben.
  6. Druckimpulsgenerator nach einem der Ansprüche 1-5, dadurch gekennzeichnet, daß er aufweist:
    - eine Zylindereinheit (5) und
    - einen Kolben (4), der verschiebbar in der Zylindereinheit (5) angeordnet ist, wobei der mindestens eine Verbindungskanal (15) in einer solchen Weise mit der Zylindereinheit (5) verbunden ist, daß das Druckfluid im Kreislauf (12) durch den Verbindungskanal (15) in und aus dem Inneren der Zylindereinheit (5) strömen kann, um eine Verstellung des Kolbens (4) in der Zylindereinheit (5) durchzuführen.
  7. Druckimpulsgenerator nach Anspruch 6, dadurch gekennzeichnet, daß der Kolben (4) mit einem Ventil (1) eines Verbrennungsmotors verbunden ist, und daß die Bewegung des Kolbens (4) auf eine Öffnungs- oder Schließbewegung des Ventils (1) des Verbrennungsmotors übertragen wird.
  8. Druckimpulsgenerator nach Anspruch 7 und 8, dadurch gekennzeichnet, daß die elektronische Vorrichtung die Aktivierung und Deaktivierung der Elektromagnete (18-21) beruhend auf der Stellung einer Kurbelwelle des Verbrennungsmotors steuert.
  9. Druckimpulsgenerator nach einem der Ansprüche 1-8, dadurch gekennzeichnet, daß das Druckfluid im Kreislauf (12) ein Gas oder ein Gasgemisch aufweist.
  10. Druckimpulsgenerator nach einem der Ansprüche 1-9, dadurch gekennzeichnet, daß das Druckfluid im Kreislauf (12) Luft aufweist.
  11. Druckimpulsgenerator nach einem der Ansprüche 1-10, dadurch gekennzeichnet, daß der Kreislauf (12) ein im wesentlichen geschlossener Kreislauf ist.
  12. Verfahren zur Steuerung eines Druckimpulsgenerators nach Anspruch 1, der aufweist
    - einen Kreislauf (12), der mit einem Druckfluid gefüllt ist, und
    - mindestens einen Verbindungskanal (15), der mit dem Kreislauf (12) verbunden ist und über den das Druckfluid in und aus dem Kreislauf (12) strömen kann,
    dadurch gekennzeichnet, daß es aufweist:
    - Steuern, mittels elektrischer Signale, der Ventile eines ersten und eines zweiten Druckimpulsgeneratorelements (6, 7), die in Reihe geschaltet sind, gemäß einer bestimmten Abfolge,
    - wobei das erste Druckimpulsgeneratorelement (6) im Kreislauf (12) stromaufwärts des mindestens einen Verbindungskanals (15) angeordnet ist, und
    - wobei das zweite Impulsgeneratorelement (7) im Kreislauf (12) stromabwärts des mindestens einen Verbindungskanals (15) angeordnet ist.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß während einer ersten Periode die Ventile (8,9) des Druckimpulsgeneratorelements (6) so gesteuert werden, daß sie sich für einen Strom des Druckfluids aus dem Kreislauf (12) über den Verbindungskanal (15) öffnen, während gleichzeitig mindestens ein Ventil des zweiten Druckimpulsgeneratorelements (7) geschlossen gehalten wird, um zu verhindern, daß Fluid am zweiten Druckimpulsgeneratorelement (7) vorbeiströmt.
  14. Verfahren nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß während einer zweiten Periode die Ventile des zweiten Ventilpaars (10,11) so gesteuert werden, daß sie sich für einen Strom des Druckfluids in den Kreislauf (12) über den Verbindungskanal (15) und an mindestens einem dieser Ventile vorbei öffnen, während mindestens eines der Ventile des ersten Ventilpaars (8,9) geschlossen gehalten wird, um zu verhindern, daß Fluid am ersten Ventilpaar vorbeiströmt.
  15. Verfahren nach einem der Ansprüche 12-14, dadurch gekennzeichnet, daß die Ventile (8, 9,10,11) jedes Druckimpulsgeneratorelements (6,7) mittels zweier getrennter, paralleler Kanäle (16,17) verbunden sind, die von einem ersten Ventil (8,10) des Ventilpaars zu einem zweiten Ventil (9,11) des Ventilpaars führen, und daß ein erstes Ventil (8,10) des Ventilpaars für einen Fluiddurchgang durch einen ersten Kanal (16) dieser Kanäle offen ist und sich für einen Fluiddurchgang im zweiten Kanal (17) schließt, während gleichzeitig das zweite Ventil (9,11) für einen Fluiddurchgang im zweiten Kanal (17) geöffnet wird und für einen Fluiddurchgang im ersten Kanal (16) geschlossen gehalten wird.
  16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß während der ersten bzw. zweiten Periode die Stellungen der Ventile (8,9,10,11) des Ventilpaars vertauscht werden, und daß die Vertauschung so gesteuert wird, daß sich beide Ventile während mindestens eines Teils der Zeitperiode zum Durchgang von Druckfluid in ein und demselben der Kanäle (16,17) gleichzeitig öffnen werden.
  17. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß die Ventile elektromagnetisch gesteuerte Schieber (8,9, 10,11) aufweisen, und daß im Moment der Vertauschung der jeweiligen Stellungen der Ventile (8,9,10,11) des Ventilpaars der Moment, an dem ein elektrisches Signal zur Aktivierung eines ersten Elektromagneten (18-21) abgegeben wird, das eine Verstellung des ersten der Ventile durchführt, in Beziehung zu dem Moment, an dem ein zweites elektrisches Signal zur Aktivierung des zweiten Elektromagneten abgegeben wird, das eine Verstellung des zweiten Ventils durchführt, beruhend auf der angeforderten Dauer des Druckfluidimpulses gesteuert wird, der dadurch über den offenen Kanal (16 oder 17) erzeugt wird.
EP01950164A 2000-07-10 2001-07-10 Druckwellengenerator Expired - Lifetime EP1299622B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE0002597A SE520993C2 (sv) 2000-07-10 2000-07-10 Tryckpulsgenerator
SE0002597 2000-07-10
SE0003473A SE0003473D0 (sv) 2000-09-28 2000-09-28 Tryckpulsgenerator
SE0003473 2000-09-28
PCT/SE2001/001598 WO2002004790A1 (en) 2000-07-10 2001-07-10 Pressure pulse generator

Publications (2)

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EP1299622A1 EP1299622A1 (de) 2003-04-09
EP1299622B1 true EP1299622B1 (de) 2008-09-03

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EP01950164A Expired - Lifetime EP1299622B1 (de) 2000-07-10 2001-07-10 Druckwellengenerator

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EP (1) EP1299622B1 (de)
AT (1) ATE407283T1 (de)
AU (1) AU2001271190A1 (de)
DE (1) DE60135660D1 (de)
ES (1) ES2311528T3 (de)
WO (1) WO2002004790A1 (de)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102011000412A1 (de) 2011-01-31 2012-08-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolbenmotor
DE102012011583A1 (de) * 2012-06-13 2013-12-19 Robert Bosch Gmbh Vorrichtung und Verfahren zur Druckerzeugung für fließfähige Medien

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SE522163C2 (sv) * 2002-05-30 2004-01-20 Cargine Engineering Ab Metod och anordning för tryckpulsgenerering
SE522165C2 (sv) * 2002-05-30 2004-01-20 Cargine Engineering Ab Metod och anordning för generering av tryckpulser
SE0301457L (sv) * 2003-05-20 2004-11-21 Cargine Engineering Ab Metod och anordning för pneumatisk drivning av ett verktyg
SE527373C2 (sv) * 2004-02-18 2006-02-21 Cargine Engineering Ab Metod för genering av tryckpulser, tryckpulsgenerator och en med en sådan försedd kolvmotor
SE526975C2 (sv) 2004-03-01 2005-11-29 Cargine Engineering Ab Metod för generering av tryckpulser, tryckpulsgenerator och en med en sådan försedd kolvmotor
SE544218C2 (sv) 2011-10-21 2022-03-08 Freevalve Ab Tryckfluidstyrd aktuator
NO334443B1 (no) * 2012-08-22 2014-03-03 Viking Heat Engines As Pulsbredderegulerende ventil
SE544645C2 (en) * 2020-03-02 2022-10-04 Freevalve Ab Actuator and method for operating an actuator

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US5058857A (en) * 1990-02-22 1991-10-22 Mark Hudson Solenoid operated valve assembly
DE19931129A1 (de) * 1998-07-11 2000-01-13 Armin Stelzig Ventilsteuerung bei einem 4-Takt-Verbrennungsmotor

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CA2332943C (en) * 1998-05-22 2008-05-20 Charles L. Gray, Jr. Fast valve and actuator
US6024060A (en) * 1998-06-05 2000-02-15 Buehrle, Ii; Harry W. Internal combustion engine valve operating mechanism
US6044815A (en) * 1998-09-09 2000-04-04 Navistar International Transportation Corp. Hydraulically-assisted engine valve actuator

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US2339353A (en) * 1942-06-16 1944-01-18 William A Ray Fluid control valve
US5058857A (en) * 1990-02-22 1991-10-22 Mark Hudson Solenoid operated valve assembly
DE19931129A1 (de) * 1998-07-11 2000-01-13 Armin Stelzig Ventilsteuerung bei einem 4-Takt-Verbrennungsmotor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011000412A1 (de) 2011-01-31 2012-08-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolbenmotor
DE102012011583A1 (de) * 2012-06-13 2013-12-19 Robert Bosch Gmbh Vorrichtung und Verfahren zur Druckerzeugung für fließfähige Medien

Also Published As

Publication number Publication date
ES2311528T3 (es) 2009-02-16
WO2002004790A1 (en) 2002-01-17
DE60135660D1 (de) 2008-10-16
AU2001271190A1 (en) 2002-01-21
ATE407283T1 (de) 2008-09-15
EP1299622A1 (de) 2003-04-09

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