EP1266135B1 - Electrovanne destinee a commander la soupape d'injection d'un moteur a combustion interne - Google Patents

Electrovanne destinee a commander la soupape d'injection d'un moteur a combustion interne Download PDF

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Publication number
EP1266135B1
EP1266135B1 EP01995615A EP01995615A EP1266135B1 EP 1266135 B1 EP1266135 B1 EP 1266135B1 EP 01995615 A EP01995615 A EP 01995615A EP 01995615 A EP01995615 A EP 01995615A EP 1266135 B1 EP1266135 B1 EP 1266135B1
Authority
EP
European Patent Office
Prior art keywords
armature
armature plate
solenoid valve
plate
actuating element
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
EP01995615A
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German (de)
English (en)
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EP1266135A1 (fr
Inventor
Uwe Grytz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1266135A1 publication Critical patent/EP1266135A1/fr
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Publication of EP1266135B1 publication Critical patent/EP1266135B1/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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed armatures
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
    • F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
    • 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
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to a solenoid valve for controlling a Injection valve of an internal combustion engine according to the generic term of claim 1.
  • Solenoid valve is used to control the fuel pressure in the Control pressure chamber of an injection valve, for example in Injector of a common rail injection system, related. about the fuel pressure in the control pressure chamber becomes the movement of a Valve piston controlled with an injection opening of the injection valve is opened or closed.
  • the known Solenoid valve has one arranged in a housing part Electromagnets, a movable armature and a moved with the anchor, by a closing spring in the closing direction acted upon control valve member with a Valve seat of the solenoid valve interacts and thus the fuel outflow controls from the control pressure chamber.
  • a friend The disadvantage of solenoid valves is the so-called anchor bounce.
  • the armature When the magnet is switched off, the armature becomes and with it the control valve member from the closing spring of the solenoid valve accelerated toward the valve seat to a fuel drain channel from the control pressure chamber.
  • the impact the control valve member on the valve seat can be a disadvantage Swinging and / or bouncing of the control valve member on the valve seat result in the control of the injection process is affected.
  • the armature In the case of DE 197 08 104 A1 known solenoid valve, the armature is therefore in two parts with an anchor bolt and one on the anchor bolt slidably mounted anchor plate executed so that the anchor plate upon impact of the control valve member on the valve seat against the resilience of a return spring advanced. The return spring then conveys the anchor plate in their starting position on a stop part back of the anchor bolt. Thanks to the two-part design of the anchor becomes the effectively braked mass and thus the kinetic energy of the bouncing on the armature hitting the valve seat is reduced, however the anchor plate after closing the solenoid valve on the Swing the
  • the overstroke can be through the front of one of the anchor bolts leading, stationary in the housing of the solenoid valve clamped slider or by a the slider upstream part, for example an annular disc become.
  • a the slider upstream part for example an annular disc become.
  • the solenoid valve according to the invention with the characteristic Features of claim 1 avoids that in the prior art disadvantages.
  • By arranging one on one section of the armature plate facing away from the electromagnet arranged actuator which is relative to that of the electromagnet facing end of the anchor plate in the sliding direction the anchor plate is adjustable is advantageous achieved that the maximum sliding path of the anchor plate on the Anchor bolt can be adjusted in a very simple manner, without parts being replaced or sanded several times have to. A multi-step setting process eliminated.
  • the proposed solution is in particular one automated line production can be used cost-effectively.
  • the damping device can advantageously be a hydraulic one Damping space between one end of the Actuator and one of the front of the actuator facing Face of the stationary in the housing of the solenoid valve fixed part of the damping device is formed become.
  • the actuator can at its the fixed part facing end face an axial through opening Have implementation of the anchor bolt.
  • the actuator on the anchor plate is particularly advantageous to have the actuator on the anchor plate to be arranged adjustable via a thread. Go berserk the actuator with the anchor plate fixed or by turning the anchor plate with the actuator fixed, the maximum Sliding path of the anchor plate on the anchor bolt in easier Way to be set precisely.
  • the actuator is preferably one with an internal thread provided screw member is formed on a penetrated by the anchor bolt and with an external thread provided section of the anchor plate is screwed.
  • the accuracy of the setting results from the Thread.
  • the very flat thread pitch advantageously results in a Self-locking of the thread, so that the actuator in its End position is fixed.
  • the return spring with a End in the housing of the solenoid valve and with its other end supported on the actuator.
  • Fig. 1 shows the upper part of a from the prior art known fuel injection valve 1, which for use is determined in a fuel injection system with a High-pressure fuel storage is equipped by a High pressure feed pump continuously with high pressure fuel is supplied.
  • the fuel injector 1 shown has a valve housing 4 with a longitudinal bore 5 in which a valve piston 6 is arranged with one end on an arranged in a nozzle body, not shown Valve needle acts.
  • the valve needle is in a pressure chamber arranged, via a pressure bore 8 with high pressure standing fuel is supplied.
  • Through one then connected to the pressure chamber Injection opening is used to inject the fuel the combustion chamber of the internal combustion engine.
  • valve piston 6 is on its end facing away from the valve needle in a cylinder bore 11 out, which is introduced into a valve piece 12 which is inserted into the valve housing 4.
  • a control pressure chamber 14 which has a Inlet channel connected to a high-pressure fuel connection is.
  • the inlet channel is essentially made up of three parts. A radially through the wall of the valve piece 12 leading Bore, the inner walls of which are part of their length form an inlet throttle 15, with one the valve piece annular space 16 surrounding the circumference is permanently connected, which annulus in turn via one in the inlet channel inserted fuel filter in constant connection with the high-pressure fuel connection in the valve housing 4 screw-in connector 9 stands.
  • the annular space 16 is sealed to the longitudinal bore 5 via a sealing ring 39.
  • the control pressure chamber 14 Via the inlet throttle 15, the control pressure chamber 14 is in the High fuel pressure prevailing high fuel pressure exposed.
  • a bore extending in the valve piece 12 Coaxial to the valve piston 6 branches out of the Control pressure chamber 14 a bore extending in the valve piece 12 from that provided with a discharge throttle 18
  • Fuel drain channel 17 forms the in a relief chamber 19 opens out with a low-pressure fuel connection 10 is connected, which in turn in no further shown way with a fuel return of the injection valve 1 is connected.
  • the outlet of the fuel drain channel 17 from the valve piece 12 takes place in the area of a conically countersunk part 21 of the outer Face of the valve piece 12.
  • the valve piece 12 is fixed in a flange area 22 via a screw member 23 clamped with the valve housing 4.
  • a valve seat 24 is formed in the conical part 21, with which a control valve member 25 of the injection valve controlling solenoid valve 30 cooperates.
  • the control valve member 25 is in shape with a two-part anchor an anchor bolt 27 and an anchor plate 28 coupled, which armature with an electromagnet 29 of the solenoid valve 30 works together.
  • the solenoid valve 30 includes the electromagnet surrounding housing part 60 that with the valve housing 4 firmly connected via screwable connecting means 7 is.
  • the armature plate 28 under the influence of their inertial mass against the preload a return spring 35 dynamically displaceable on the anchor bolt 27 stored and is at rest by this return spring against one on the anchor bolt in an annular groove 49 fixed stop part 26 pressed.
  • the opening and closing of the injection valve is as follows described controlled by the solenoid valve 30.
  • the Anchor bolt 27 is constantly in through the closing spring 31 Closing direction applied, so that the control valve member 25 when the electromagnet is not energized in the closed position on Valve seat 24 abuts and the control pressure chamber 14 to the relief side 19 is closed so that there over the inlet channel very quickly builds up the high pressure that is also present in the high-pressure fuel reservoir.
  • Over the area the end face 13 generates the pressure in the control pressure chamber 14 a closing force on the valve piston 6 and thus in Connected valve needle that is larger than the other in the opening direction as a result of the pending High pressure forces.
  • control pressure chamber 14 by opening the solenoid valve to the relief side 19 opened, the pressure builds up in the small volume of the Control pressure chamber 14 very quickly, since this via the inlet throttle 15 is decoupled from the high pressure side. Consequently predominates on the valve needle in the opening direction force acting on the valve needle High fuel pressure so that the valve needle is up moves and the at least one injection opening Injection is opened.
  • the solenoid valve closes 30 the fuel drain channel 17, the pressure in the control pressure chamber 14 through the one flowing in via the inlet channel 15 Fuel can be rebuilt so that the original Closing force is applied and the valve needle of the fuel injector closes.
  • a arranged between the anchor plate 28 and the sliding sleeve 34 Over stroke stop related, for example in the form of a formed with a recessed disc part can be.
  • the overstroke can also by the Anchor plate 28 facing end face of the slider is formed become.
  • the spacer 38, the slider 34 and the Overstroke stops are fixed in place in the solenoid valve housing.
  • the overstroke limit limits the maximum possible Displacement of the anchor plate 28 on the anchor bolt 27.
  • Das Raising of the anchor plate 28 is between the overstroke and the anchor plate 28 formed hydraulic Damping space reduced and the anchor plate 28 arrives faster back to their starting position on the stop part 26 back.
  • the setting of the overtravel respectively the maximum sliding path of the anchor plate 28 on the anchor bolt
  • 27 is quite complex and is done by Replacing spacers or grinding the slider.
  • Solenoid valve has an armature plate 28 on its electromagnet 29 facing away from an axially adjustable actuator 50 is arranged.
  • the anchor plate 28 may be relative to the actuator 50 the end face 41 of the armature plate facing the electromagnet 28 can be adjusted in the sliding direction of the anchor plate 28.
  • the Actuator 50 can be a sliding bushing, for example. In is the preferred embodiment shown here the actuator 50, however, on the anchor plate 28 via a thread arranged adjustable and has the sliding sleeve on it 34 facing end face 51 an axial through opening 53 for carrying out the anchor bolt 27.
  • the actuator 50 is provided with an internal thread 46 Screw member formed on one of the anchor bolts 27 penetrated and provided with an external thread 45 Section 42 of the anchor plate 28 is screwed on, which Section 42 a nozzle protruding toward the sliding sleeve 34 the anchor plate 28 forms.
  • Section 42 a nozzle protruding toward the sliding sleeve 34 the anchor plate 28 forms.
  • Actuator shown in an initial position in which it is up is screwed to the stop on the connecting piece 42.
  • For setting the maximum sliding path of the anchor plate 28 is Actuator in the position shown in the right part of FIG. 2 screwed. This can be done so that the Actuator 50 initially so far from the nozzle 42 of the anchor plate 28 is unscrewed until its end face 51st abuts on the end face 52 of the slider 34.
  • the actuator 50 can also be fixed are and the anchor plate 28 are rotated until the correct overtravel is set.
  • Screw thread of the actuator has a small thread pitch on.
  • UV-curable locking agents can be used after setting the overtravel by means of be cured with a UV lamp. As in the right part of Fig. 2 can be seen, forms the end face 51 of the actuator 50 and that facing the end face 51 of the actuator Front 52 of the stationary sliding sleeve 34 between them hydraulic damping chamber through which a reverberation the anchor plate 28 is damped.
  • the return spring 35 is supported with one end on the Flange 32 of the slider 34 and with its other end the side 43 of the anchor plate facing away from the end face 41 28 and surrounds the actuator 50, which is therefore only is difficult to access.
  • a particularly advantageous embodiment in which the actuator 50 is more accessible is shown in Fig. 3.
  • Fig. 3 shows the actuator 50 in a lateral extension of its facing the slider 34 Front 51 on a circumferential collar 55 on which the return spring 35 facing away from the slider 34 End supports.
  • the left side in Fig. 3 shows the Start position, the right side the set end position.
  • the actuator 50 in FIG. 3 not surrounded by the return spring 35 and is therefore for the Adjustment process more accessible. So tools can be on the Sides of the actuator are better positioned.
  • Also in this Embodiment can optionally by rotating the anchor plate with the actuator held or by rotation of the actuator with the anchor plate held in place the maximum Sliding path of the anchor plate 28 on the anchor bolt 27 is precisely adjusted become.

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

Abstract

Electrovanne destinée à commander la soupape d'injection d'un moteur à combustion interne, qui possède un électroaimant (29), un induit mobile doté d'une plaque (28) et d'un axe (27) et un obturateur (25) de vanne pilote se déplaçant avec l'induit et coopérant avec un siège (24) de soupape pour l'ouverture et la fermeture d'un canal d'écoulement (17) de carburant d'une chambre de pression pilote (14) de la soupape d'injection (1). La plaque (28) d'induit est montée coulissante sur l'axe (27) d'induit sous l'effet de sa masse inerte dans la direction de fermeture de l'obturateur (25) de vanne pilote contre la force élastique d'un ressort de rappel (35) agissant sur la plaque (28) d'induit. Selon la présente invention, la plaque d'induit est pourvue d'un élément de réglage qui est placé sur une partie (42) de ladite plaque (28) opposée à l'électroaimant (29) et qui peut être ajusté par rapport à une face (41) de la plaque d'induit orientée vers l'électroaimant, dans la direction de coulissement de la plaque (28) d'induit, ce qui permet de pouvoir ajuster de manière simple la trajectoire de coulissement maximale de la plaque (28) d'induit.

Claims (8)

  1. Electrovanne pour la commande d'un injecteur d'un moteur à combustion interne, comprenant un électro-aimant (29), un induit mobile possédant une plaque d'induit (28) et une tige d'induit (27), et un élément de soupape de commande qui se déplace avec l'induit et qui coopère avec un siège de soupape (24) pour ouvrir et fermer un conduit d'écoulement de carburant (17) d'une chambre de pression de commande (14) de l'injecteur (1), laquelle plaque d'induit (28) est montée mobile en translation à glissement sur la tige d'induit (27) avec effet de sa masse inerte dans le sens de la fermeture de l'élément de soupape de commande (25) à l'encontre de la force de tension d'un ressort de rappel (35) qui agit sur la plaque d'induit (28), et un dispositif d'amortissement hydraulique avec lequel une oscillation après impulsion de la plaque d'induit (28) peut être amortie dans sa translation dynamique sur la tige d'induit (27), lequel dispositif d'amortissement comprend une partie fixe (34) et une partie (50) qui se déplace avec la plaque d'induit (28),
    caractérisée en ce que
    la partie (50) qui se déplace avec la plaque d'induit est formée par un organe de réglage qui est placé sur un segment (42) de la plaque d'induit (28) éloigné de l'électro-aimant (29) et cet organe peut être déplacé par rapport à un côté frontal (41) de la plaque d'induit dirigé vers l'électro-aimant, dans la direction du coulissement de la plaque d'induit (28), pour effectuer le réglage de la course de coulissement maximale de la plaque d'induit (28).
  2. Electrovanne selon la revendication 1,
    caractérisée en ce qu'
    un côté frontal (51) de l'organe de réglage (50), et un côté frontal (52) tourné vers le côté frontal (51) de l'organe de réglage, et appartenant à la partie (34) du dispositif d'amortissement bloquée fixe en position dans le boítier (60) de l'électrovanne (30) forment entre eux une chambre d'amortissement hydraulique.
  3. Electrovanne selon la revendication 1 ou 2,
    caractérisée en ce que
    l'organe de réglage (50) présente, sur son côté frontal (52) tourné vers la partie fixe (34), une ouverture de passage (53) pour le passage de la tige d'induit (27).
  4. Electrovanne selon une des revendications 1 à 3,
    caractérisée en ce que
    l'organe de réglage (50) est relié à la plaque d'induit (28) de façon à pouvoir déplacé au moyen d'un filetage.
  5. Electrovanne selon la revendication 4,
    caractérisée en ce que
    l'organe de réglage (50) est constitué par un élément à pas de vis muni d'un filetage intérieur (46), qui est vissé sur un segment (42) de la plaque d'induit (28) traversé par la tige d'induit (27) et muni d'un filetage extérieur (45).
  6. Electrovanne selon une des revendications 4 ou 5,
    caractérisée en ce que
    le déplacement axial de l'organe de réglage (50) par rapport au côté frontal (41) de la plaque d'induit (28) qui est dirigé vers l'électro-aimant (29) est de préférence inférieur à un demi millimètre par tour complet de l'organe de réglage (50).
  7. Electrovanne selon une des revendications 1 à 6,
    caractérisée en ce que
    l'élément de réglage (50) peut être arrêté dans la position réglée sur la plaque d'induit (28).
  8. Electrovanne selon une des revendications 1 à 7,
    caractérisée en ce que
    le ressort de rappel (35) prend appui dans le boítier (60) de l'électrovanne (60) par une extrémité et contre l'organe de réglage (50) par son autre extrémité (figure 3).
EP01995615A 2001-01-08 2001-12-15 Electrovanne destinee a commander la soupape d'injection d'un moteur a combustion interne Expired - Lifetime EP1266135B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10100422 2001-01-08
DE10100422A DE10100422A1 (de) 2001-01-08 2001-01-08 Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
PCT/DE2001/004752 WO2002053905A1 (fr) 2001-01-08 2001-12-15 Electrovanne destinee a commander la soupape d'injection d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1266135A1 EP1266135A1 (fr) 2002-12-18
EP1266135B1 true EP1266135B1 (fr) 2004-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01995615A Expired - Lifetime EP1266135B1 (fr) 2001-01-08 2001-12-15 Electrovanne destinee a commander la soupape d'injection d'un moteur a combustion interne

Country Status (5)

Country Link
US (1) US6688579B2 (fr)
EP (1) EP1266135B1 (fr)
JP (1) JP4083014B2 (fr)
DE (2) DE10100422A1 (fr)
WO (1) WO2002053905A1 (fr)

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DE10100422A1 (de) 2002-07-11
JP4083014B2 (ja) 2008-04-30
EP1266135A1 (fr) 2002-12-18
US20030178593A1 (en) 2003-09-25
JP2004516425A (ja) 2004-06-03
DE50103110D1 (de) 2004-09-09
US6688579B2 (en) 2004-02-10
WO2002053905A1 (fr) 2002-07-11

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