EP1283354A2 - Fuel injection system - Google Patents

Fuel injection system Download PDF

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Publication number
EP1283354A2
EP1283354A2 EP02016623A EP02016623A EP1283354A2 EP 1283354 A2 EP1283354 A2 EP 1283354A2 EP 02016623 A EP02016623 A EP 02016623A EP 02016623 A EP02016623 A EP 02016623A EP 1283354 A2 EP1283354 A2 EP 1283354A2
Authority
EP
European Patent Office
Prior art keywords
fuel
solenoid valve
fuel injection
injector
return
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.)
Withdrawn
Application number
EP02016623A
Other languages
German (de)
French (fr)
Other versions
EP1283354A3 (en
Inventor
Cornelio Leonardi
Rainer Haeberer
Marco Balice
Helmut Clauss
Hans-Peter Schaal
Andreas Rettich
Markus Rueckle
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 EP1283354A2 publication Critical patent/EP1283354A2/en
Publication of EP1283354A3 publication Critical patent/EP1283354A3/en
Withdrawn legal-status Critical Current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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting 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
    • 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 fuel injection device with an injector and a solenoid valve to control the injection process.
  • a solenoid valve to control the injection process.
  • Solenoid valve control solenoid
  • the installation space i.e. 90 ° to the injector, flanged to the injector housing.
  • Venting the armature space of the solenoid valve presents problems.
  • Known fuel injection device is proposed on a End of the solenoid valve facing away from the injector provided. This can lead to installation space problems. Finds an insufficient one Venting, d. H. formation of air bubbles in the anchor space occurs a lack of damping in the absence of fuel. The anchor tilts in such cases to vibrations.
  • FIG. 1 shows the structure of part of a fuel injection device 1 is visible.
  • the general structure of such a fuel injection device 1 is known and is described, for example, in EP 0 907 018 A2. Therefore, Fig. 1 shows only the upper part.
  • a pressure line 2 in a housing 3 of an injector 3 'of the fuel injection device 1 leads to high-pressure fuel to a nozzle space, not shown in FIG. 1.
  • a push rod 4 bears against a nozzle needle, also not shown, in such a way that it can be moved from an open position to a closed position or vice versa.
  • the movement of the nozzle needle is controlled via the pressure ratio in a control space 5 to the nozzle space, since the control space 5 in a valve piece 6 is also filled with fuel under high pressure via a pressure line 7 .
  • the control room 5 can be relieved of pressure to carry out the fuel injection by continuously connecting the control room 5 to a return bore, which is connected to a fuel tank, by means of a solenoid valve 8 arranged at a 90 ° angle to the push rod.
  • the solenoid valve 8 closes an opening in a valve plate 9 via a pressurizable ball 10 .
  • the solenoid valve 8 which is known in its functional design, further comprises an armature guide 11 , an armature pin 12 , an armature plate 13 , a valve spring 14 and an armature plate spring 15 . If the anchor bolt 15 is pulled back when the solenoid valve 8 flows against it (open valve position), the pressure relief of the control room 5 is initiated. This results in the bold or dotted flow guidance within the solenoid valve 8. Air bubble formation in an armature space 16 of the solenoid valve 8 is avoided because the flow guidance entrains air bubbles and leads out of the solenoid valve 8 to the outside.
  • a leakage line 17 for returning fuel from a pressure rod chamber when the nozzle needle is open is connected to a lower flow channel 18 , so that a leakage quantity from the pressure rod region and a control quantity of fuel from the control region are combined at this point.
  • the air bubbles are first forced into an upper flow channel 19 and then into the return bore and thus out of the solenoid valve 8. Fuel is diverted in the solenoid valve 8 and led out again. A flow guidance over flow channels is formed, which avoids a backflow.
  • the input channel is divided into two flow paths S 1 and S 2 in order to lead fuel up to the valve spring 14, preferably to unite there, then again in opposite directions on two further flow paths S 3 and Lead out S 4 in the direction of the inlet channel (valve plate 9) and feed it to the fuel tank again (fuel return indicated by dots).
  • the arrangement of the seals 20, 21, 23, 25 takes into account the pressures applied to the seals 20, 21, 23, 25.
  • Hard metallic seals are proposed for high pressures. Teflon® seals are suggested for seals that are exposed to lower pressures or that have less of a leakage effect.
  • the control room 5 is limited at the top by a hard seal.
  • the seal 23 is pressed upward by the pressure acting on the seal 23, as a result of which the control space 5 is kept as minimal as possible. Via the support ring 24 and the shape of the space around the seal 23, the seal 23 is brought into a defined axial position. Since the pressure difference between the ring channel 22 and the control room 5 is smaller than the pressure difference between the control room 5 and the housing 3, the use of the sealing material Teflon® is justified.
  • a radial fixation between the housing 3 and the valve piece 6 is carried out by means of a metallic pin 26 according to FIG. 2 .
  • a semicircular bore 27, 28 is provided, in the space between which the pin 26 is pressed and thus provides a clear assignment.
  • the arrangement of the fixation on a large diameter makes the assignment insensitive to tolerances.
  • the lugs 30 protrude into the housing 3 and thus prevent the disk 27 from rotating when a locking screw 31 is tightened. A rotation of the valve piece 6 when tightening the screw plug 29 is thus excluded.

Abstract

The device has an injector (3') and a solenoid valve (8) to control the injection process. The valve interior has a first flow channel to feed fuel through an anchor chamber (16) and at least one second flow channel to return the fuel towards an aperture. The second channel is connected to a fuel return into a fuel tank. The fuel return is located in the injector housing (3). The solenoid valve is positioned at an angle of 90 degrees relative to the injector housing. There is an upper and a lower channel for fuel flow return (S3,4). An injector leakage tube (17) is connected to one of the valve flow channels.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Kraftstoffeinspritzeinrichtung mit einem Injektor und mit einem Magnetventil zur Steuerung des Einspritzvorgangs. Vorzugsweise ist das Magnetventil (Stellmagnet) aus durch den Bauraum bedingten Gründen quer, d.h. 90° zum Injektor, am Injektorgehäuse angeflanscht.The invention relates to a fuel injection device with an injector and a solenoid valve to control the injection process. Preferably that is Solenoid valve (control solenoid) for reasons related to the installation space, i.e. 90 ° to the injector, flanged to the injector housing.

Eine derartige Kraftstoffeinspritzeinrichtung ist beispielsweise durch die EP 0 907 018 A2 bekannt geworden.Such a fuel injection device is described, for example, by EP 0 907 018 A2 became known.

Probleme bereitet die Entlüftung des Ankerraums des Magnetventils. Bei der bekannten Kraftstoffeinspritzeinrichtung wird vorgeschlagen, an einem dem Injektor abgewandten Ende des Magnetventils einen Kraftstoffrücklauf vorzusehen. Dies kann zu Bauraumproblemen führen. Findet eine unzureichende Entlüftung, d. h. eine Bildung von Luftblasen im Ankerraum statt, kommt es zu einer mangelnden Dämpfung bei fehlendem Kraftstoff. Der Anker neigt in derartigen Fällen zu Schwingungen.Venting the armature space of the solenoid valve presents problems. In the Known fuel injection device is proposed on a End of the solenoid valve facing away from the injector provided. This can lead to installation space problems. Finds an insufficient one Venting, d. H. formation of air bubbles in the anchor space occurs a lack of damping in the absence of fuel. The anchor tilts in such cases to vibrations.

Vorteile der ErfindungAdvantages of the invention

Zur Vermeidung dieser Probleme wird eine Kraftstoffeinspritzung gemäß Patentanspruch 1 vorgeschlagen. Durch die Strömungsführung im Magnetventil wird innerhalb der Randbedingungen eine Entlüftung des Ankerraums des Magnetventils, d. h. ein möglichst vollständig nur mit Kraftstoff gefüllter Ankerraum, gewährleistet. Damit verbunden ist eine ausreichende Ankerdämpfung und demzufolge eine gute Injektordynamik und insbesondere eine Realisierung eines geringen Abstands zwischen der Vor- und Haupteinspritzung. Als Folge davon reduziert sich überdies die Rücklaufmenge. To avoid these problems, fuel injection is performed according to Claim 1 proposed. Through the flow in the solenoid valve If the anchor space is vented within the boundary conditions Solenoid valve, d. H. one that is as completely filled with fuel as possible Anchor room, guaranteed. Adequate anchor damping is associated with this and consequently good injector dynamics and in particular a realization a small distance between the pre and main injection. As a result this also reduces the return volume.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung wird anhand schematischer Darstellungen näher erläutert. Es zeigt:

Fig. 1
einen Teil einer Kraftstoffeinspritzeinrichtung mit einem Magnetventil zur Steuerung der Kraftstoffeinspritzung im Längsschnitt;
Fig. 2
einen vergrößerten Ausschnitt eines Querschnitts entlang der Linie II-II in Fig. 1;
Fig. 3
einen vergrößerten Ausschnitt eines Querschnitts entlang der Linie III-III in Fig. 1.
An embodiment of the invention is explained in more detail with reference to schematic representations. It shows:
Fig. 1
part of a fuel injection device with a solenoid valve for controlling the fuel injection in longitudinal section;
Fig. 2
an enlarged section of a cross section along the line II-II in Fig. 1;
Fig. 3
an enlarged section of a cross section along the line III-III in Fig. 1st

Beschreibung des AusführungsbeispielsDescription of the embodiment

Aus der Fig. 1 ist der Aufbau eines Teils einer Kraftstoffeinspritzeinrichtung 1 ersichtlich. Der allgemeine Aufbau einer derartigen Kraftstoffeinspritzeinrichtung 1 ist bekannt und beispielsweise in der EP 0 907 018 A2 beschrieben. Daher zeigt Fig. 1 nur den oberen Teil. Eine Druckleitung 2 in einem Gehäuse 3 eines Injektors 3' der Kraftstoffeinspritzeinrichtung 1 führt unter Hochdruck stehenden Kraftstoff zu einem in der Fig. 1 nicht dargestellten Düsenraum. Eine Druckstange 4 liegt an einer ebenfalls nicht dargestellten Düsennadel derart an, dass diese von einer Offenstellung in eine Schließstellung bzw. umgekehrt bewegt werden kann. Die Bewegung der Düsennadel wird über das Druckverhältnis in einem Kontrollraum 5 zu dem Düsenraum gesteuert, da der Kontrollraum 5 in einem Ventilstück 6 über eine Druckleitung 7 ebenfalls mit unter Hochdruck stehendem Kraftstoff befüllt wird. Der Kontrollraum 5 kann zur Durchführung der Kraftstoffeinspritzung druckentlastet werden, indem der Kontrollraum 5 mit Hilfe eines unter einem 90° Winkel zur Druckstange angeordneten Magnetventils 8 an eine Rücklaufbohrung durchgängig angeschlossen wird, die mit einem Kraftstofftank in Verbindung steht. Das Magnetventil 8 verschließt eine Öffnung in einer Ventilplatte 9 über eine druckbeaufschlagbare Kugel 10. Das in seinem funktionalen Aufbau bekannte Magnetventil 8 umfasst weiterhin eine Ankerführung 11, einen Ankerbolzen 12, eine Ankerplatte 13, eine Ventilfeder 14 und eine Ankerplattenfeder 15. Wird der Ankerbolzen 15 bei Anströmung des Magnetventils 8 zurückgezogen (geöffnete Ventilstellung), so wird die Druckentlastung des Kontrollraum 5 eingeleitet. Dabei kommt es zu der fett bzw. gepunktet eingezeichneten Strömungsführung innerhalb des Magnetventils 8. Eine Luftblasenbildung in einem Ankerraum 16 des Magnetventils 8 wird vermieden, weil die Strömungsführung Luftblasen mitreißt und aus dem Magnetventil 8 nach außen führt. Eine Leckageleitung 17 zur Rückführung von Kraftstoff aus einem Druckstangenraum bei Offenstellung der Düsennadel ist mit einem unteren Strömungskanal 18 verbunden, so dass an dieser Stelle eine Vereinigung einer Leckagemenge aus dem Druckstangenbereich und einer Steuermenge an Kraftstoff aus dem Kontrollbereich stattfindet. Die Luftblasen werden zunächst in einen oberen Strömungskanal 19 und anschließend in die Rücklaufbohrung und somit aus dem Magnetventil 8 gedrängt. Kraftstoff wird im Magnetventil 8 umgeleitet und wieder heraus geführt. Es wird eine Strömungsführung über Strömungskanäle ausgebildet, die einen Rückstau vermeidet. Nach dem Eintritt von Kraftstoff aus dem Kontrollraum 5 in das Magnetventil 8 wird der Eingangskanal in zwei Strömungspfade S 1 und S 2 aufgeteilt, um Kraftstoff bis zur Ventilfeder 14 zu führen, dort vorzugsweise zu vereinigen, anschließend wieder gegenläufig auf zwei weiteren Strömungspfaden S 3 und S 4 in Richtung Eingangskanal (Ventilplatte 9) herauszuführen und dem Kraftstofftank erneut zuzuführen (Kraftstoffrückführung gepunktet angedeutet).From Fig. 1 shows the structure of part of a fuel injection device 1 is visible. The general structure of such a fuel injection device 1 is known and is described, for example, in EP 0 907 018 A2. Therefore, Fig. 1 shows only the upper part. A pressure line 2 in a housing 3 of an injector 3 'of the fuel injection device 1 leads to high-pressure fuel to a nozzle space, not shown in FIG. 1. A push rod 4 bears against a nozzle needle, also not shown, in such a way that it can be moved from an open position to a closed position or vice versa. The movement of the nozzle needle is controlled via the pressure ratio in a control space 5 to the nozzle space, since the control space 5 in a valve piece 6 is also filled with fuel under high pressure via a pressure line 7 . The control room 5 can be relieved of pressure to carry out the fuel injection by continuously connecting the control room 5 to a return bore, which is connected to a fuel tank, by means of a solenoid valve 8 arranged at a 90 ° angle to the push rod. The solenoid valve 8 closes an opening in a valve plate 9 via a pressurizable ball 10 . The solenoid valve 8, which is known in its functional design, further comprises an armature guide 11 , an armature pin 12 , an armature plate 13 , a valve spring 14 and an armature plate spring 15 . If the anchor bolt 15 is pulled back when the solenoid valve 8 flows against it (open valve position), the pressure relief of the control room 5 is initiated. This results in the bold or dotted flow guidance within the solenoid valve 8. Air bubble formation in an armature space 16 of the solenoid valve 8 is avoided because the flow guidance entrains air bubbles and leads out of the solenoid valve 8 to the outside. A leakage line 17 for returning fuel from a pressure rod chamber when the nozzle needle is open is connected to a lower flow channel 18 , so that a leakage quantity from the pressure rod region and a control quantity of fuel from the control region are combined at this point. The air bubbles are first forced into an upper flow channel 19 and then into the return bore and thus out of the solenoid valve 8. Fuel is diverted in the solenoid valve 8 and led out again. A flow guidance over flow channels is formed, which avoids a backflow. After the entry of fuel from the control room 5 into the solenoid valve 8, the input channel is divided into two flow paths S 1 and S 2 in order to lead fuel up to the valve spring 14, preferably to unite there, then again in opposite directions on two further flow paths S 3 and Lead out S 4 in the direction of the inlet channel (valve plate 9) and feed it to the fuel tank again (fuel return indicated by dots).

Zur Abdichtung der Anordnung werden eine harte metallische Dichtung 20 zur Abdichtung zwischen dem Gehäuse 3 und dem Ventilstück 6, eine Hochdruckdichtung 21 aus Teflon® zur Abdichtung zwischen dem Druckstangenraum und einem Ringkanal 22, eine Hochdruckabdichtung 23 aus Teflon® im Zusammenwirken mit einem Stützring 24 zur Abdichtung zwischen dem Kontrollraum 5 und dem Ringkanal 22 und schließlich eine harte metallische Hochdruckdichtung 25 zur Abdichtung zwischen dem Kontrollraum 5 und dem Magnetventil 8 verwendet. Die Anordnung der Dichtungen 20, 21, 23, 25 berücksichtigt die an den Dichtungen 20, 21, 23, 25 anliegenden Drücke. Für große Drücke werden harte metallische Dichtungen vorgeschlagen. Bei Dichtungen, die kleineren Drücken ausgesetzt sind oder bei denen eine geringere Auswirkung einer Undichtheit auftritt, werden Teflon® dichtungen vorgeschlagen. Der Kontrollraum 5 ist nach oben durch eine harte Abdichtung begrenzt. Die Dichtung 23 wird durch den auf die Dichtung 23 wirkenden Druck nach oben gedrückt, wodurch der Kontrollraum 5 möglichst minimal gehalten wird. Über den Stützring 24 und die Formgebung des Raumes um die Dichtung 23 wird die Dichtung 23 in eine definierte axiale Lage gebracht. Da die Druckdifferenz zwischen Ringkanal 22 und Kontrollraum 5 kleiner ist als die Druckdifferenz zwischen Kontrollraum 5 und Gehäuse 3 rechtfertigt sich die Verwendung des Dichtmaterials Teflon®.To seal the arrangement, a hard metallic seal 20 for sealing between the housing 3 and the valve piece 6, a high-pressure seal 21 made of Teflon® for sealing between the push rod chamber and an annular channel 22, a high-pressure seal 23 made of Teflon® in cooperation with a support ring 24 are used Seal between the control room 5 and the annular channel 22 and finally a hard metallic high pressure seal 25 is used for sealing between the control room 5 and the solenoid valve 8. The arrangement of the seals 20, 21, 23, 25 takes into account the pressures applied to the seals 20, 21, 23, 25. Hard metallic seals are proposed for high pressures. Teflon® seals are suggested for seals that are exposed to lower pressures or that have less of a leakage effect. The control room 5 is limited at the top by a hard seal. The seal 23 is pressed upward by the pressure acting on the seal 23, as a result of which the control space 5 is kept as minimal as possible. Via the support ring 24 and the shape of the space around the seal 23, the seal 23 is brought into a defined axial position. Since the pressure difference between the ring channel 22 and the control room 5 is smaller than the pressure difference between the control room 5 and the housing 3, the use of the sealing material Teflon® is justified.

Um eine gezielte radiale Montage des Ventilstücks 6 zu gewährleisten, da sich die Verbindungsbohrungen treffen müssen, wird mittels eines metallischen Stiftes 26 gemäß Fig. 2 eine radiale Fixierung zwischen dem Gehäuse 3 und dem Ventilstück 6 vorgenommen. Sowohl im Gehäuse 3 als auch im Ventilstück 6 ist eine halbkreisförmige Bohrung 27, 28 vorgesehen, in deren Zwischenraum der Stift 26 eingedrückt wird und so eine klare Zuordnung vorgibt. Durch die Anordnung der Fixierung auf großem Durchmesser ist die Zuordnung toleranzunempfindlich. Über dem Verbindungsstück 6 liegt eine Scheibe 29 mit zwei Nasen 30 gemäß Fig. 3, von denen in dem Ausschnitt der Fig. 3 nur eine dargestellt ist. Die Nasen 30 ragen in das Gehäuse 3 hinein und verhindern somit ein Verdrehen der Scheibe 27 beim Anziehen einer Verschlussschraube 31. Ein Verdrehen des Ventilstücks 6 beim Anziehen der Verschlussschraube 29 ist damit ausgeschlossen. In order to ensure a targeted radial assembly of the valve piece 6, since the connecting bores must meet, a radial fixation between the housing 3 and the valve piece 6 is carried out by means of a metallic pin 26 according to FIG. 2 . Both in the housing 3 and in the valve piece 6, a semicircular bore 27, 28 is provided, in the space between which the pin 26 is pressed and thus provides a clear assignment. The arrangement of the fixation on a large diameter makes the assignment insensitive to tolerances. Above the connecting piece 6 there is a washer 29 with two lugs 30 according to FIG. 3 , of which only one is shown in the detail of FIG. 3. The lugs 30 protrude into the housing 3 and thus prevent the disk 27 from rotating when a locking screw 31 is tightened. A rotation of the valve piece 6 when tightening the screw plug 29 is thus excluded.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
KraftstoffeinspritzeinrichtungFuel injection system
22
Druckleitungpressure line
33
Gehäusecasing
3'3 '
Injektorinjector
44
Druckstangepushrod
55
Kontrollraumcontrol room
66
Ventilstückvalve piece
77
Druckleitungpressure line
88th
Magnetventilmagnetic valve
99
Ventilplattevalve plate
1010
KugelBullet
1111
Ankerführungarmature guide
1 21 2
Ankerbolzenanchor bolts
1313
Ankerplatteanchor plate
1414
Ventilfedervalve spring
1 51 5
AnkerplattenfederAnchor plate spring
1616
Ankerraumarmature space
1717
Leckageleitungleakage line
1818
Unterer StrömungskanalLower flow channel
1919
Oberer StrömungskanalUpper flow channel
2020
Dichtungpoetry
2121
Dichtungpoetry
2222
Ringkanalannular channel
2323
Dichtungpoetry
2424
Stützringsupport ring
2525
Dichtungpoetry
2626
Stiftpen
2727
Bohrungdrilling
2828
Bohrungdrilling
2929
Scheibe disc
3030
Nasenose
3131
VerschlussschraubeScrew
S1 S 1
Strömungspfadflow path
S2 S 2
Strömungspfadflow path
S3 S 3
Strömungspfadflow path
S4 S 4
Strömungspfadflow path

Claims (5)

Kraftstoffeinspritzeinrichtung (1) mit einem Injektor (3') und mit einem Magnetventil (8) zur Steuerung des Einspritzvorgangs, das in seinem Innenraum mindestens einen ersten Strömungskanal zur Hindurchführung von Kraftstoff durch einen Ankerraum (16) des Magnetventils (8) und mindestens einen zweiten Strömungskanal zur Rückführung von Kraftstoff aus dem Magnetventil (8) heraus in Richtung Magnetventilöffnung aufweist, wobei der mindestens eine zweite Strömungskanal mit einer Kraftstoffrückführung in einen Kraftstofftank verbunden ist.Fuel injection device (1) with an injector (3 ') and with a Solenoid valve (8) for controlling the injection process in his Interior at least a first flow channel for the passage of Fuel through an armature space (16) of the solenoid valve (8) and at least a second flow channel for returning fuel from the Has solenoid valve (8) towards solenoid valve opening, the at least a second flow channel with a fuel return in a fuel tank is connected. Kraftstoffeinspritzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein oberer und ein unterer Strömungskanal zur Strömungsrückführung (S3, S4) vorgesehen ist.Fuel injection device according to claim 1, characterized in that an upper and a lower flow channel for flow return (S 3 , S 4 ) is provided. Kraftstoffeinspritzeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Kraftstoffrückführung im Injektorgehäuse (3) ausgebildet ist.Fuel injection device according to claim 1 or 2, characterized in that the fuel return is formed in the injector housing (3). Kraftstoffeinspritzeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Magnetventil (8) unter Ausbildung eines 90° Winkel zum Injektorgehäuse (3) angeordnet ist.Fuel injection device according to one of the preceding claims, characterized in that the solenoid valve (8) is arranged to form a 90 ° angle to the injector housing (3). Kraftstoffeinspritzeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Leckageleitung (17) des Injektors (3') mit einem Strömungskanal des Magnetventils (8) verbunden ist.Fuel injection device according to one of the preceding claims, characterized in that a leakage line (17) of the injector (3 ') is connected to a flow channel of the solenoid valve (8).
EP02016623A 2001-08-11 2002-07-25 Fuel injection system Withdrawn EP1283354A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001139680 DE10139680A1 (en) 2001-08-11 2001-08-11 Fuel injection system
DE10139680 2001-08-11

Publications (2)

Publication Number Publication Date
EP1283354A2 true EP1283354A2 (en) 2003-02-12
EP1283354A3 EP1283354A3 (en) 2003-11-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02016623A Withdrawn EP1283354A3 (en) 2001-08-11 2002-07-25 Fuel injection system

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EP (1) EP1283354A3 (en)
JP (1) JP2003113762A (en)
DE (1) DE10139680A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907018A2 (en) 1997-10-02 1999-04-07 ELASIS SISTEMA RICERCA FIAT NEL MEZZOGIORNO Società Consortile per Azioni Electromagnetic fuel injector for internal combustion engines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605166A (en) * 1985-02-21 1986-08-12 Stanadyne, Inc. Accumulator injector
DE59310268D1 (en) * 1992-12-23 2002-04-11 Ganser Hydromag Ag Zuerich Fuel injector
DE19616812B4 (en) * 1995-04-27 2004-09-30 Nippon Soken, Inc., Nishio Fuel injector
JP3446432B2 (en) * 1995-12-05 2003-09-16 株式会社デンソー Fuel injection device
EP0844385B1 (en) * 1996-11-21 2003-03-05 Denso Corporation Accumulator fuel injection apparatus for internal combustion engine
DE19917190A1 (en) * 1999-04-16 2000-10-26 Mtu Friedrichshafen Gmbh Fuel injector for internal combustion engine; has high pressure channel to supply fuel and nozzle needle in guide bore and has high pressure space behind guide bore to receive overflowing fuel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907018A2 (en) 1997-10-02 1999-04-07 ELASIS SISTEMA RICERCA FIAT NEL MEZZOGIORNO Società Consortile per Azioni Electromagnetic fuel injector for internal combustion engines

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EP1283354A3 (en) 2003-11-26
JP2003113762A (en) 2003-04-18
DE10139680A1 (en) 2003-02-27

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