EP1043497B1 - Soupape de commande - Google Patents

Soupape de commande Download PDF

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Publication number
EP1043497B1
EP1043497B1 EP00107266A EP00107266A EP1043497B1 EP 1043497 B1 EP1043497 B1 EP 1043497B1 EP 00107266 A EP00107266 A EP 00107266A EP 00107266 A EP00107266 A EP 00107266A EP 1043497 B1 EP1043497 B1 EP 1043497B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve plate
flow channel
control valve
mouth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00107266A
Other languages
German (de)
English (en)
Other versions
EP1043497A2 (fr
EP1043497A3 (fr
Inventor
Tsutomu Fuseya
Mahoro Fujita
Hermann Breitbach
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.)
Isuzu Motors Ltd
Delphi Technologies Inc
Original Assignee
Isuzu Motors Ltd
Delphi Technologies Inc
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 Isuzu Motors Ltd, Delphi Technologies Inc filed Critical Isuzu Motors Ltd
Publication of EP1043497A2 publication Critical patent/EP1043497A2/fr
Publication of EP1043497A3 publication Critical patent/EP1043497A3/fr
Application granted granted Critical
Publication of EP1043497B1 publication Critical patent/EP1043497B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention relates to a switching valve according to the preamble of claim 1.
  • Such a switching valve is known and is used in particular for actuation of valves, such as injection valves in internal combustion engines, used.
  • the switching valve has one Flow channel on, one end of which with a pressure chamber of the actuating valve can be connected.
  • the other end of the flow channel opens into a work space provided on the switching valve, in which a valve plate for closing the flow channel is arranged.
  • the valve plate can be between a closed position and a release position can be moved back and forth.
  • opening the Flow channel can be the pressure chamber of the valve to be actuated, for example connected to a discharge line or to the environment become.
  • the known switching valve is used in an injection valve in a diesel engine used the injection timing and the injection duration of the to determine the fuel to be injected through the injection valve can.
  • To close the injector of the injector is one provided in a needle guide slidably mounted nozzle needle between the injector and the pressure chamber with which the flow channel of the switching valve is connected, hydraulically clamped is that the nozzle needle keeps the injector closed. By opening the flow channel, this relaxes in the pressure chamber located fluid, so that the nozzle needle releases the injection nozzle. To the closing of the flow channel builds up inside the pressure chamber pressure again through which the nozzle needle returns to its die Injector closing position is moved.
  • a switching valve of the type mentioned in the opening paragraph is in EP-A-0 851 115 described.
  • the closing element is located completely within the through hole of the radially protruding Federal.
  • the valve plate is dimensioned so that it does not radially extends beyond this through opening.
  • valve body is designed such that the valve plate in its Closed position on the protruding from the through opening Closing element is present, which closes the mouth of the flow channel, being simultaneously between the radially through the through opening extending valve plate and the valve body a gap remains.
  • the mouth of the flow channel closed by the separate closing element which between the valve plate and the mouth of the flow channel is. If the valve plate is moved to the release position, this is because Closing element without pretension at the mouth of the flow channel so that the fluid past the closing element from or into the flow channel can flow.
  • the valve plate is returned to its closed position moves, she takes the closing element, which in turn turns on aligns the mouth of the flow channel and closes it as soon as the valve plate has reached its final closed position.
  • the closing element can move relative to the valve plate is an exact one Guiding and positioning of the valve plate relative to the mouth of the Flow channel no longer required, so that both the valve plate as well as the guide for the valve plate can be made less precisely must than with the known switching valves.
  • the Freedom of movement of the closing element relative to the mouth of the flow channel achieved that the closing element by the inflowing or flowing fluid is moved to a position in which it is even rests against the mouth and seals it properly as soon as it is pressed against the mouth by the valve plate and closes it.
  • Valve plate in its closed position on the out of the through opening protruding closing element sealingly abuts when it muzzle closes the flow channel without, however, resting on the valve body, so that there is a gap between the valve plate and the valve body remains, it is ensured that the total closing force the valve plate is only transferred to the closing element, whereby a particularly good sealing effect can be achieved.
  • the fluid from the Gap between the valve plate and the valve body are promoted, which slows down the closing movement of the valve plate and any oscillating movements of the valve plate that occur after the impact on the closing element by springing back of the valve plate arise, be dampened.
  • valve ball As the closing element, due to their spherical shape in any position relative to the mouth of the flow channel at the mouth is linear.
  • the valve plate preferably has a Recess for the closing element on the mouth of the flow channel is aligned.
  • the recess and the mouth Form the recess and / or the mouth conically.
  • the depth of the The mouth is larger than the stroke of the valve plate. So that the closing element, for example a bullet held in the mouth. simultaneously the closing element in the mouth can be parallel to the valve plate move so that it can center in the mouth.
  • the closing element evenly on the wall of the recess created and held in a defined position.
  • a conical recess and one with a conical is suitable Sealing surface provided mouth when using a valve ball as Closing element that is special due to its surface curvature well on the inclined walls of the recess and the mouth snugly.
  • Switch valves are on the inner surface facing the flow channel of the work space provided resilient elements on the valve plate are attached and guide them, so that a displacement of the valve plate is prevented transversely to their direction of movement.
  • the valve plate is preferably in its closed position by a compression spring held and with the help of an actuator in their release position moves, since it is ensured that the switching valve in the event of a failure of the Actuator remains closed.
  • the switching valve according to the invention is the working area by a one or multi-part valve body, a ring adjacent to the valve body and an adjacent ring Disc limited.
  • the figure shows a switching valve 10 in a sectional side view.
  • the switching valve 10 is on a holding body 12 of an injection valve 14 arranged.
  • In the holding body 12 is a extending in the longitudinal direction Through hole 16 formed on the in the figure End face of the holding body 12 shown above ends.
  • a piston 18 is inserted along the through bore 16 can be moved back and forth and with one end (not shown) on the end face of a nozzle needle (not shown) with which the injection nozzle (not shown) of the injection valve 14 can be locked.
  • the switching valve 10 has a cylindrical valve body 20 which is inserted into the through hole 16 of the holding body 12.
  • the inner circumference of the through bore 16 and that of the valve body 20 facing end of the piston 18 form a high pressure chamber 22, the purpose of which will be explained later.
  • the high pressure chamber 22 is under high pressure fuel filled along the nozzle needle and the piston 18 through the through hole 16 into the cavity 22 has arrived.
  • valve body 20 In the valve body 20 is an extending in the longitudinal direction Flow channel 24 formed, which with the high pressure chamber 22 in connection stands and in one on the injection valve 14 facing away from the end face of the valve body 20 shown above conical sealing surface 26 ends.
  • a collar 28 On the top face of the valve body 20 is a collar 28 is formed, which protrudes in the radial direction and in the middle of which is arranged concentrically to the conical sealing surface 26 Through opening 30 is formed.
  • the injector 14 the flat side of the collar 28 facing away lies in turn on a ring 32, which is also arranged concentrically to the conical sealing surface 26.
  • the ring 32 is covered by a circular disk 34, the one has through opening 36 in its center.
  • At the injector 14 facing away from the flat side of the second disc 34 are one annular magnet coil 38 and a hollow cylindrical housing 40 provided, both of which are arranged concentrically around the opening 36.
  • the collar 28, the ring 32 and the disc 34 delimit a working space 42, in which a circular valve plate 44 is received whose valve body 20 facing front one to the conical Sealing surface 26 aligned recess 46 is formed has a frustoconical cross-sectional shape. Furthermore are with connected to the rear of the valve plate 44 a plurality of resilient elements 48, which protrude downward from the disk 34 and the valve plate 44 hold in a defined position concentric to the conical sealing surface 26. Between the recess 46 of the valve plate 44 and the conical Sealing surface 26 is arranged a valve ball 50 with which the flow channel 24 can be closed.
  • the valve plate 44 is driven by the force F of a compression spring (not shown) held in a closed position in which it is under tension the valve ball 50 abuts and against the conical sealing surface 26 presses so that the flow channel 24 is closed in a fluid-tight manner.
  • a compression spring (not shown) held in a closed position in which it is under tension the valve ball 50 abuts and against the conical sealing surface 26 presses so that the flow channel 24 is closed in a fluid-tight manner.
  • To the To open flow channel 24 can be made of a ferromagnetic Material manufactured valve plate 44 using the solenoid 38 against the Force of the compression spring and the resilient elements 48 into a release position in which the valve plate 44 and the valve ball 50 are lifted off the valve body 20.
  • the maximum stroke of the valve plate 44 by the height of the ring 32 in the direction of movement of the valve plate 44 is specified, is dimensioned so that the Valve ball 50 between the recess 46 and the conical sealing surface 26 can move freely, a jumping out of the valve ball 50 from the Recess 46 and the conical sealing surface 26 is prevented.
  • valve plate 44 As long as the valve plate 44 is in its closed position, the Flow channel 24 through the pre-stressed on the conical Sealing surface 26 adjacent valve ball 50 closed. This prevents that the fuel in the high-pressure chamber 22 is about the switching valve 10 can escape, so that the piston 18 in its lowered Position persists. In this position, the piston 18 holds the nozzle needle in a position in which it closes the injection nozzle, whereby the nozzle needle due to the pressure applied to the injection nozzle of the fuel supplied to the injection valve 14 against the piston 18 is biased, that is, hydraulically between the high pressure chamber 22 and the injector is clamped.
  • the solenoid 38 moves the ferromagnetic valve plate 44 against the force of the compression spring in their release position, whereby the valve ball 50 is released becomes. Due to the pressure acting in the high pressure chamber 22, the valve ball 50 lifted off so that the flow channel 24 is no longer closed is and the fuel in the high-pressure chamber 22 through the flow channel 24 flows into the working space 42, from which it escapes into a leak fuel line via the opening 36 in the disk 34. Due to the falling pressure in the high pressure chamber 22, the from the force exerted on the piston 18 on the nozzle needle is so small that the nozzle needle due to the fuel under high pressure at the injection nozzle is raised and the piston 18 in the direction of the switching valve 10 moves. At the same time, the nozzle needle opens the injection nozzle, so that the fuel enters the cylinder of the engine.
  • valve plate 44 As soon as the injection control deactivates the magnet coil 38, the Valve plate 44 by the force of the compression spring and the resilient elements 48 moved back to its closed position, in which the valve ball 50 presses against the conical sealing surface 26, which the flow channel 24th closes again.
  • the movement of the valve plate 44 is characterized by the the gap between the valve plate 44 and the collar 28 of the valve body 20 fuel to be displaced damped the closing movement the valve plate 44 slows down, causing the valve plate to spring back 44 effectively prevented after impacting the valve ball 50 becomes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Multiple-Way Valves (AREA)
  • Sliding Valves (AREA)

Claims (12)

  1. Soupape de commande, notamment pour l'actionnement d'une soupape d'injection dans un moteur à combustion interne, comportant un corps de soupape (20), qui possède un collet (28) qui fait saillie radialement et dans lequel est monté un canal d'écoulement (24), qui débouche par une extrémité dans une chambre de travail (42), le collet (28), qui fait saillie radialement, étant pourvu d'une ouverture de passage (30) agencée d'une manière concentrique pour l'embouchure (26) du canal d'écoulement (24) du corps de soupape (20), et comportant une plaque de soupape (44), qui est logée dans la chambre de travail (42) et est déplaçable entre une position de fermeture et une position de libération, et un élément de fermeture (50), qui est disposé entre la plaque de soupape (44) et l'embouchure (26) du canal d'écoulement (24) et qui ferme ce canal lorsque la plaque de soupape (44) est située dans sa position de fermeture, dans laquelle le corps de soupape (20) est agencé de telle sorte que dans sa position de fermeture, la plaque de soupape (44) est en butée contre l'élément de fermeture (50) qui ferme l'embouchure (26) du canal d'écoulement (24), caractérisée en ce qu'une fente subsiste entre la plaque de soupape (44) qui s'étend radialement au-delà de l'ouverture de passage (30), et le corps de soupape (20) et en ce que dans sa position de fermeture, l'élément de fermeture (50) fait saillie hors de l'ouverture de passage (30).
  2. Soupape de commande selon la revendication 1, caractérisée en ce que l'élément de fermeture est une bille de soupape (50).
  3. Soupape de commande selon la revendication 1 ou 2, caractérisée en ce que la plaque de soupape (44) comporte un évidement (46), qui est retenu par rapport à l'embouchure (26) du canal d'écoulement (5), même lorsque la plaque de soupape (44) est amenée dans sa position de libération, dans l'évidement (46) et l'embouchure (26).
  4. Soupape de commande selon la revendication 3, caractérisée en ce que l'évidement (46) et/ou l'embouchure (26) du canal d'écoulement (24) est ou sont élargi(s) avec une forme conique.
  5. Soupape de commande selon la revendication 3 ou 4, caractérisée en ce que la profondeur de l'évidement (46) est supérieure à la course de la plaque de soupape (44).
  6. Soupape de commutation selon l'une des revendications 1 à 5, caractérisée en ce que sur la surface intérieure, tournée vers le canal d'écoulement (24), de la chambre de travail (42), sont prévus des éléments élastiques (48), qui sont fixés à la plaque de soupape (44) et qui précontraignent mécaniquement cette dernière en direction du canal d'écoulement (24) de telle sorte qu'un décalage de la plaque de soupape (44) transversalement par rapport à sa direction de déplacement est empêché.
  7. Soupape de commande selon l'une des revendications 1 à 6, caractérisée en ce que la plaque de soupape (44) est.retenue par un ressort de pression dans sa position de fermeture et est déplaçable dans sa position de libération à l'aide d'un actionneur (38).
  8. Soupape de commande selon la revendication 7, caractérisée en ce qu'on utilise comme actionneur un aimant commandé électriquement (38) et que la plaque de soupape (44) est formée au moins en partie en un matériau ferromagnétique.
  9. Soupape de commande selon l'une des revendications précédentes, caractérisée par un anneau (32) qui prend appui par l'une de ses faces frontales, contre le collet (28) et contre l'autre face frontale duquel s'applique un disque (34) qui, conjointement avec le collet (28) et l'anneau (32) délimite la chambre de travail (42) de la soupape de commutation (10).
  10. Soupape de commande selon la revendication 8 ou 9, caractérisée en ce que l'aimant (38) est disposé sur la surface du disque (34), qui est tournée à l'opposé de la plaque de soupape (44) et dont l'épaisseur du matériau détermine la fente d'air, lorsque la plaque de soupape (44) est amenée dans sa position de libération.
  11. Soupape d'injection pour l'injection du carburant dans un moteur à combustion interne, notamment dans un moteur diesel, comportant un corps de retenue (12) et un corps, fixé à ce corps, d'un injecteur comportant une aiguille d'injection pour la fermeture de l'injecteur, et qui est déplaçable dans un guide d'aiguille (16) disposé entre le corps de retenue (12) et le corps d'injecteur et définissant un système d'amenée du carburant, et comportant une soupape de commande (10) selon l'une des revendications précédentes, dont le canal d'écoulement (24) est relié au guide d'aiguille (16).
  12. Soupape d'injection selon la revendication 11, caractérisée en que le corps (20) de la soupape de commande (10) ferme une extrémité de la section du guide d'aiguille (16), qui est formée dans le corps de retenue (12), est limite, avec la face frontale de l'aiguille d'injection, qui pénètre dans le corps de retenue (12), une chambre à haute pression (22), qui est reliée au canal d'écoulement (24).
EP00107266A 1999-04-07 2000-04-03 Soupape de commande Expired - Lifetime EP1043497B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19915686A DE19915686A1 (de) 1999-04-07 1999-04-07 Schaltventil
DE19915686 1999-04-07

Publications (3)

Publication Number Publication Date
EP1043497A2 EP1043497A2 (fr) 2000-10-11
EP1043497A3 EP1043497A3 (fr) 2003-04-16
EP1043497B1 true EP1043497B1 (fr) 2004-12-01

Family

ID=7903784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107266A Expired - Lifetime EP1043497B1 (fr) 1999-04-07 2000-04-03 Soupape de commande

Country Status (4)

Country Link
US (1) US6360972B1 (fr)
EP (1) EP1043497B1 (fr)
JP (1) JP3667592B2 (fr)
DE (2) DE19915686A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10161002A1 (de) * 2001-12-12 2003-07-03 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
US7051992B2 (en) * 2003-08-25 2006-05-30 Delphi Technologies, Inc. Tubeless actuator with reduced secondary air gap
DE102004015661B4 (de) * 2004-03-31 2007-08-23 Bosch Rexroth Ag Elektropneumatisches Ventil, insbesondere Vorsteuerventil für ein pneumatisches Wegeventil
WO2006042488A1 (fr) * 2004-10-21 2006-04-27 Robert Bosch Gmbh Injecteur de carburant
DE102006049050A1 (de) * 2006-10-18 2008-04-30 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff
DE102007056913A1 (de) * 2007-11-26 2009-05-28 Robert Bosch Gmbh Einspritzdüse für Kraftstoff mit Kugelventil
DE102015218054A1 (de) * 2015-09-21 2017-03-23 Robert Bosch Gmbh Ventil, insbesondere Saugventil, in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597186B1 (fr) * 1986-04-14 1990-01-12 Europ Propulsion Soupape ou vanne fonctionnant sans frottement
IT1240173B (it) * 1990-04-06 1993-11-27 Weber Srl Dispositivo di iniezione del carburante ad azionamento elettromagnetico per un motore a combustione interna
IT220660Z2 (it) * 1990-10-31 1993-10-08 Elasis Sistema Ricerca Fiat Perfezionamenti al sistema di otturatore per alta pressione in una valvola pilota di un iniettore elettromagnetico per sistemi di iniezione del combustibile di motori a combustione interna
DE4235077A1 (de) * 1992-10-17 1994-04-21 Bosch Gmbh Robert Ventil, insbesondere zum Einbau in ein Aggregat einer hydraulischen Fahrzeugbremsanlage
US5348233A (en) * 1993-03-01 1994-09-20 General Motors Corporation High volume gaseous fuel injector
DE4428385B4 (de) * 1994-08-11 2005-03-17 Robert Bosch Gmbh Ventilkörper
JP3524217B2 (ja) * 1995-06-19 2004-05-10 本田技研工業株式会社 電磁弁
IT1289795B1 (it) * 1996-12-23 1998-10-16 Elasis Sistema Ricerca Fiat Perfezionamenti ad una valvola di dosaggio a comando elettromagnetico, con otturatore a sfera, per un iniettore di combustibile.
IT1296144B1 (it) * 1997-11-18 1999-06-09 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna.
DE19832826C2 (de) * 1998-07-21 2000-08-17 Bosch Gmbh Robert Montageverfahren für Kraftstoff-Einspritzventil und Vorsteuerventil sowie Kraftstoff-Einspritzventil

Also Published As

Publication number Publication date
US6360972B1 (en) 2002-03-26
EP1043497A2 (fr) 2000-10-11
JP3667592B2 (ja) 2005-07-06
DE19915686A1 (de) 2000-10-12
EP1043497A3 (fr) 2003-04-16
JP2000310170A (ja) 2000-11-07
DE50008794D1 (de) 2005-01-05

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