EP0915254A2 - Injector controlled by a magnetic valve for an accumulator system of a multicylinder internal combustion engine - Google Patents

Injector controlled by a magnetic valve for an accumulator system of a multicylinder internal combustion engine Download PDF

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Publication number
EP0915254A2
EP0915254A2 EP98119433A EP98119433A EP0915254A2 EP 0915254 A2 EP0915254 A2 EP 0915254A2 EP 98119433 A EP98119433 A EP 98119433A EP 98119433 A EP98119433 A EP 98119433A EP 0915254 A2 EP0915254 A2 EP 0915254A2
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EP
European Patent Office
Prior art keywords
control piston
housing part
chamber
valve element
nozzle
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Withdrawn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
EP98119433A
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German (de)
French (fr)
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EP0915254A3 (en
Inventor
Ulrich Dr. Augustin
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Daimler AG
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DaimlerChrysler AG
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Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0915254A2 publication Critical patent/EP0915254A2/en
Publication of EP0915254A3 publication Critical patent/EP0915254A3/en
Withdrawn legal-status Critical Current

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    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid pressure

Definitions

  • the invention relates to a solenoid-controlled injector for a storage injection system of a multi-cylinder internal combustion engine, consisting of a multi-part injector housing with a spring-loaded nozzle body, with a control piston under system pressure in one Housing part and a valve element to shut off a supply line leading to the nozzle needle, further with one of the control piston on its side facing away from the nozzle needle limited control room, which on the one hand with the supply line via a line arrangement integrated in the control piston and valve element constantly communicates and on the other hand connectable to a relief line by means of a solenoid valve and with a nozzle spring chamber on the back of the nozzle needle.
  • Such an injector is known from DE 196 12 738 A1.
  • This injector has a control piston with an integrated valve element and is in an upper case and a lower one Part of the injector housing led.
  • the valve element is formed by a conical outer collar on the control piston, whose conical seat surface with a valve seat on a lower one Housing part interacts.
  • the feed line runs through the special valve arrangement partially in the lower housing part and partially in the upper housing part.
  • the invention has for its object measures on the generic Provide injector through the without interference a slim design of the injector with simple means an improvement of the internal seal is possible.
  • a solenoid-controlled injector 1 for a not shown Accumulator injection system of a multi-cylinder internal combustion engine consists essentially of one in the nozzle body 2 guided spring-loaded nozzle needle 3, the height of their Pressure shoulder 3a is surrounded by a pressure chamber 4, from a Control piston 5 in an upper housing part 6 of the injector housing 7 and a valve element cooperating with the control piston 5 8 in a lower housing part 9 and from a Head end of the injector 1 arranged solenoid valve 10.
  • the valve element 8 is designed as a servo valve piston one connected to the storage system and to the pressure chamber of the Nozzle needle 3 leading supply line 11 controls.
  • the feed line 11 consists of an outer circumference of the lower housing part 9 outgoing radial line section 11a and one this line section 11a and the servo valve element surrounding annular chamber 30 connecting central line section 11b and one leading away from the annular chamber 30 oblique line section 11c in the lower housing part 9.
  • the line section adjoins the line section 11c 21a in the pressure plate 21 and in the pressure chamber 4 opening pipe section 2a in the nozzle body 2.
  • the diameter of the servo valve piston is smaller than the control piston. Both pistons are one each Through hole 8a and 5a passes through, which are coaxial with each other lie so that regardless of the position of the Servo valve piston including the closed position of this Servo valve piston a constant flow connection from the Supply line 11 a to a delimited by the control piston 5 Control room 12 results.
  • Control piston 5 and servo valve piston 8 are by small bumps 13,14 formed on the end faces of the two pistons.
  • the humps 13,14 are at the level of the parting plane A of the control piston and Servo valve pistons and are smaller in diameter than the servo valve piston 8.
  • Both humps 13, 14 and the upper housing part 6 delimit an annular space 15 through a line connection on the one hand with a solenoid valve chamber 16 and on the other hand communicates with a nozzle spring chamber 17.
  • the line connection consists of a radial groove 18, that on the nozzle-side end face of the upper housing part 6 is incorporated, from a flat 19 on the outer circumference of the upper housing part 6 and a connecting hole 20 in the lower Housing part 9 of the servo valve piston together. It results there is a leakage connection on the one hand from the annular space 15 the groove 18 and flat 19 in the solenoid valve chamber 16 and others from the groove 18 via the connecting bore 20 in the Nozzle spring chamber 17.
  • the nozzle spring chamber 17 is located in a between the nozzle body 2 and lower housing part 9 lying pressure plate 21. Nozzle body 2 and pressure plate 21 are through an adapter sleeve 22 clamped to the lower housing part 9. Furthermore, the solenoid valve 10 and the upper housing part 6 by another Clamping sleeve 23 clamped to the lower housing part 9.
  • the control room 12 also contains a longitudinally displaceable plate 24 with a solenoid valve-side through channel 24a and one into this central small throttle 25, the opposite an inlet throttle 26 in the through hole 5a of the Control piston 5 and an outlet throttle 27 between the control chamber 12 and valve ball 28 of the solenoid valve 10 a smaller one Passage cross section.
  • the arrangement of this tile 24 with defined throttle 25 minimizes leakage.
  • the lower housing part 9 also contains a designated 31 Locking piston connected by a throttle connection 32 to the feed line 11 is connected.
  • a throttle connection 32 to the feed line 11 is connected.

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  • 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)

Abstract

A control piston is held under system pressure in a housing part and a valve component cuts off a feed conduit leading to the nozzle needle. A control chamber is limited by the control piston on its side turned away form the nozzle needle. The control chamber is in permanent connection with the feed conduit via a conduit arrangement integrated in the control piston and valve component. The control chamber is also connected by a magnet valve with an unloading conduit and with a nozzle spring chamber on the rear side of the nozzle needle. The control piston (5) and the smaller diameter valve component (8) form two separated parts in two different housing parts (6,9). The upper housing part (6) accommodating the control piston (5) contains no feed conduit.

Description

Die Erfindung betrifft einen magnetventilgesteuerten Injektor für ein Speichereinspritzsystem einer mehrzylindrigen Brennkraftmaschine, bestehend aus einem mehrteiligen Injektorgehäuse mit einem eine federbelastete.Düsennadel aufweisenden Düsenkörper, mit einem unter Systemdruck stehenden Steuerkolben in einem Gehäuseteil sowie einem Ventilelement zur Absperrung einer zur Düsennadel führenden Zuführleitung, ferner mit einem von dem Steuerkolben auf seiner der Düsennadel abgewandten Seite begrenzten Steuerraum, welcher einerseits mit der Zuführleitung über eine im Steuerkolben und Ventilelement integrierte Leitungsanordnung ständig in Verbindung steht und andererseits durch ein Magnetventil mit einer Entlastungsleitung verbindbar ist, und mit einem Düsenfederraum auf der Rückseite der Düsennadel.The invention relates to a solenoid-controlled injector for a storage injection system of a multi-cylinder internal combustion engine, consisting of a multi-part injector housing with a spring-loaded nozzle body, with a control piston under system pressure in one Housing part and a valve element to shut off a supply line leading to the nozzle needle, further with one of the control piston on its side facing away from the nozzle needle limited control room, which on the one hand with the supply line via a line arrangement integrated in the control piston and valve element constantly communicates and on the other hand connectable to a relief line by means of a solenoid valve and with a nozzle spring chamber on the back of the nozzle needle.

Ein derartiger Injektor ist aus der DE 196 12 738 A1 bekannt. Dieser Injektor hat einen Steuerkolben mit integriertem Ventilelement und ist in einem oberen Gehäuseteil und einem unteren Gehäuseteil des Injektorgehäuses geführt. Das Ventilelement ist durch einen kegelförmigen Außenbund am Steuerkolben gebildet, dessen Kegelsitzfläche mit einem Ventilsitz an einem unteren Gehäuseteil zusammenwirkt. Die Zuführleitung verläuft durch die besondere Ventilanordnung teilweise in dem unteren Gehäuseteil und teilweise in dem oberen Gehäuseteil. Such an injector is known from DE 196 12 738 A1. This injector has a control piston with an integrated valve element and is in an upper case and a lower one Part of the injector housing led. The valve element is formed by a conical outer collar on the control piston, whose conical seat surface with a valve seat on a lower one Housing part interacts. The feed line runs through the special valve arrangement partially in the lower housing part and partially in the upper housing part.

Der Erfindung liegt die Aufgabe zugrunde, Maßnahmen am gattungsgemäßen Injektor vorzusehen, durch die ohne Beeinträchtigung einer schlanken Bauweise des Injektors mit einfachen Mitteln eine Verbesserung der internen Abdichtung möglich ist.The invention has for its object measures on the generic Provide injector through the without interference a slim design of the injector with simple means an improvement of the internal seal is possible.

Zur Lösung der Aufgabe dienen die im Kennzeichen des Patentanspruch 1 angegebenen Merkmale.To solve the problem serve in the characterizing part of the claim 1 specified characteristics.

In den Unteransprüchen sind noch förderliche Weiterbildungen der Erfindung angegeben.In the subclaims there are still further training opportunities specified the invention.

Durch die Trennung der Komponenten von Steuerkolben und Ventilelement ergibt sich eine Vereinfachung der Bearbeitung der Komponentenführungen, ferner ist durch den Verlauf der Zuführleitung lediglich in dem das Ventilelement aufnehmenden unteren Gehäuseteil keine hochdruckdichte Trennfläche zwischen dem oberen und unteren Gehäuseteil mehr erforderlich, da das obere Gehäuseteil mit seinem Steuerkolben zuführleitungsfrei ist. Auf Feinstbearbeitungen kann verzichtet werden. Es müssen nur noch die Trennflächen wie bei konventionellen Düsenhaltern hochdruckdicht sein.By separating the components from the control piston and valve element this simplifies the processing of the Component guides, further is through the course of the feed line only in the lower receiving the valve element Housing part no high-pressure-tight interface between the upper and lower part of the housing required more because the upper part of the housing is free of supply lines with its control piston. On Fine machining can be omitted. It just has to the separating surfaces are pressure-tight as with conventional nozzle holders be.

Der Gegenstand der Erfindung ist in der Zeichnung dargestellt und wird anhand eines Ausführungsbeispieles im folgenden näher beschrieben.The object of the invention is shown in the drawing and will be explained in more detail below using an exemplary embodiment described.

Ein magnetventilgesteuerter Injektor 1 für ein nicht näher dargestelltes Speichereinspritzsystem einer mehrzylindrigen Brennkraftmaschine besteht im wesentlichen aus einer im Düsenkörper 2 geführten federbelasteten Düsennadel 3, die in Höhe ihrer Druckschulter 3a von einem Druckraum 4 umgeben ist, aus einem Steuerkolben 5 in einem oberen Gehäuseteil 6 des Injektorgehäuses 7 und einem mit dem Steuerkolben 5 zusammenwirkenden Ventilelement 8 in einem unteren Gehäuseteil 9 sowie aus einem am Kopfende des Injektors 1 angeordneten Magnetventil 10. A solenoid-controlled injector 1 for a not shown Accumulator injection system of a multi-cylinder internal combustion engine consists essentially of one in the nozzle body 2 guided spring-loaded nozzle needle 3, the height of their Pressure shoulder 3a is surrounded by a pressure chamber 4, from a Control piston 5 in an upper housing part 6 of the injector housing 7 and a valve element cooperating with the control piston 5 8 in a lower housing part 9 and from a Head end of the injector 1 arranged solenoid valve 10.

Das Ventilelement 8 ist als Servoventilkolben ausgebildet, der eine mit dem Speichersystem verbundene und zu dem Druckraum der Düsennnadel 3 hinführende Zuführleitung 11 steuert. Die Zuführleitung 11 besteht aus einem vom Außenumfang des unteren Gehäuseteiles 9 ausgehenden radialen Leitungsabschnitt 11a und einem diesen Leitungsabschnitt 11a und eine das Servoventilelement umgebende Ringkammer 30 verbindenden zentralen Leitungsabschnitt 11b sowie einen von der Ringkammer 30 wegführenden schräg verlaufenden Leitungsabschnitt 11c im unteren Gehäuseteil 9. An den Leitungsabschnitt 11c schließen sich der Leitungsabschnitt 21a in der Druckplatte 21 und der in den Druckraum 4 mündende Leitungsabschnitt 2a in dem Düsenkörper 2 an.The valve element 8 is designed as a servo valve piston one connected to the storage system and to the pressure chamber of the Nozzle needle 3 leading supply line 11 controls. The feed line 11 consists of an outer circumference of the lower housing part 9 outgoing radial line section 11a and one this line section 11a and the servo valve element surrounding annular chamber 30 connecting central line section 11b and one leading away from the annular chamber 30 oblique line section 11c in the lower housing part 9. The line section adjoins the line section 11c 21a in the pressure plate 21 and in the pressure chamber 4 opening pipe section 2a in the nozzle body 2.

Der Servoventilkolben ist im Durchmesser kleiner ausgebildet als der Steuerkolben. Beide Kolben sind von jeweils einer Durchgangsbohrung 8a und 5a durchsetzt, die koaxial zueinander liegen, so daß sich unabhängig von der jeweiligen Stellung des Servoventilkolbens einschließlich der Schließstellung dieses Servoventilkolbens eine ständige Strömungsverbindung von der Zuführleitung 11a zu einem von dem Steuerkolben 5 begrenzten Steuerraum 12 ergibt.The diameter of the servo valve piston is smaller than the control piston. Both pistons are one each Through hole 8a and 5a passes through, which are coaxial with each other lie so that regardless of the position of the Servo valve piston including the closed position of this Servo valve piston a constant flow connection from the Supply line 11 a to a delimited by the control piston 5 Control room 12 results.

Die einander zugewandten Anlageflächen bzw. Dichtflächen von Steuerkolben 5 und Servoventilkolben 8 sind durch kleine Höcker 13,14 auf den Stirnflächen der beiden Kolben gebildet. Die Höcker 13,14 liegen in Höhe der Trennebene A von Steuerkolben und Servoventilkolben und sind im Durchmesser kleiner als der Servoventilkolben 8. Beide Höcker 13,14 und das obere Gehäuseteil 6 begrenzen einen Ringraum 15, der durch eine Leitungsverbindung einerseits mit einem Magnetventilraum 16 und andererseits mit einem Düsenfederraum 17 in Verbindung steht.The mutually facing contact surfaces or sealing surfaces of Control piston 5 and servo valve piston 8 are by small bumps 13,14 formed on the end faces of the two pistons. The humps 13,14 are at the level of the parting plane A of the control piston and Servo valve pistons and are smaller in diameter than the servo valve piston 8. Both humps 13, 14 and the upper housing part 6 delimit an annular space 15 through a line connection on the one hand with a solenoid valve chamber 16 and on the other hand communicates with a nozzle spring chamber 17.

Die Leitungsverbindung setzt sich aus einer radialen Nut 18, die an der düsenseitigen Stirnfläche des oberen Gehäuseteiles 6 eingearbeitet ist, aus einer Anflächung 19 am Außenumfang des oberen Gehäuseteiles 6 und einer Verbindungsbohrung 20 im unteren Gehäuseteil 9 des Servoventilkolbens zusammen. Es ergibt sich eine Leckageverbindung zum einen von dem Ringraum 15 über die Nut 18 und Anflächung 19 in den Magnetventilraum 16 und zum anderen von der Nut 18 über die Verbindungsbohrung 20 in den Düsenfederraum 17.The line connection consists of a radial groove 18, that on the nozzle-side end face of the upper housing part 6 is incorporated, from a flat 19 on the outer circumference of the upper housing part 6 and a connecting hole 20 in the lower Housing part 9 of the servo valve piston together. It results there is a leakage connection on the one hand from the annular space 15 the groove 18 and flat 19 in the solenoid valve chamber 16 and others from the groove 18 via the connecting bore 20 in the Nozzle spring chamber 17.

Der Düsenfederraum 17 befindet sich in einer zwischen Düsenkörper 2 und unterem Gehäuseteil 9 liegenden Druckplatte 21. Düsenkörper 2 und Druckplatte 21 sind durch eine Spannhülse 22 mit dem unteren Gehäuseteil 9 verspannt. Ferner sind das Magnetventil 10 und der obere Gehäuseteil 6 durch eine weitere Spannhülse 23 mit dem unteren Gehäuseteil 9 verspannt.The nozzle spring chamber 17 is located in a between the nozzle body 2 and lower housing part 9 lying pressure plate 21. Nozzle body 2 and pressure plate 21 are through an adapter sleeve 22 clamped to the lower housing part 9. Furthermore, the solenoid valve 10 and the upper housing part 6 by another Clamping sleeve 23 clamped to the lower housing part 9.

Der Steuerraum 12 enthält noch ein längsverschiebliches Plättchen 24 mit einer magnetventilseitigen Durchgangsrinne 24a und einer in diese mündenden zentralen kleinen Drossel 25, die gegenüber einer Zulaufdrossel 26 in der Durchgangsbohrung 5a des Steuerkolbens 5 und einer Ablaufdrossel 27 zwischen Steuerraum 12 und Ventilkugel 28 des Magnetventiles 10 einen kleineren Durchlaßquerschnitt aufweist. Die Anordnung dieses Plättchens 24 mit definierter Drossel 25 minimiert auftretende Leckagemengen.The control room 12 also contains a longitudinally displaceable plate 24 with a solenoid valve-side through channel 24a and one into this central small throttle 25, the opposite an inlet throttle 26 in the through hole 5a of the Control piston 5 and an outlet throttle 27 between the control chamber 12 and valve ball 28 of the solenoid valve 10 a smaller one Passage cross section. The arrangement of this tile 24 with defined throttle 25 minimizes leakage.

Der untere Gehäuseteil 9 enthält noch einen mit 31 bezeichneten Schließkolben , der durch eine Drosselverbindung 32 mit der Zuführleitung 11 verbunden ist. Im Falle einer Funktionsstörung des Injektors 1 bewirkt der Schließkolben 31 über eine im Düsenfederraum 17 angeordnete Hubstange 33 das Schließen der Düsennadel 2.The lower housing part 9 also contains a designated 31 Locking piston connected by a throttle connection 32 to the feed line 11 is connected. In the event of a malfunction of the injector 1 causes the closing piston 31 via a in the nozzle spring chamber 17 arranged lifting rod 33 closing the nozzle needle 2nd

Claims (6)

Magnetventilgesteuerter Injektor für ein Speichereinspritzsystem einer mehrzylindrigen Brennkraftmaschine, bestehend aus einem mehrteiligen Injektorgehäuse mit einem eine federbelastete Düsennadel aufweisenden Düsenkörper, mit einem unter Systemdruck stehenden Steuerkolben in einem Gehäuseteil sowie einem Ventilelement zur Absperrung einer zur Düsennadel führenden Zuführleitung, ferner mit einem von dem Steuerkolben auf seiner der Düsennadel abgewandten Seite begrenzten Steuerraum, welcher einerseits mit der Zuführleitung über eine im Steuerkolben und Ventilelement integrierte Leitungsanordnung ständig in Verbindung steht und andererseits durch ein Magnetventil mit einer Entlastungsleitung verbindbar ist, und mit einem Düsenfederraum auf der Rückseite der Düsennadel,
dadurch gekennzeichnet,
daß der Steuerkolben (5) und das durchmessermäßig kleinere Ventilelement (8) zwei getrennte Bauteile in zwei verschiedenen Gehäuseteilen (6;9) des Injektorgehäuses (7) bilden, wobei das den Steuerkolben (5) aufnehmende obenliegende Gehäuseteil (6) zuleitungsfrei ausgebildet ist.Solenoid valve-controlled injector for a storage injection system of a multi-cylinder internal combustion engine, consisting of a multi-part injector housing with a nozzle body having a spring-loaded nozzle needle, with a control piston under system pressure in a housing part and a valve element for shutting off a supply line leading to the nozzle needle, and also with one from the control piston on it the control chamber facing away from the nozzle needle, which on the one hand is continuously connected to the supply line via a line arrangement integrated in the control piston and valve element and on the other hand can be connected to a relief line by means of a solenoid valve, and with a nozzle spring chamber on the back of the nozzle needle,
characterized,
that the control piston (5) and the smaller-diameter valve element (8) form two separate components in two different housing parts (6; 9) of the injector housing (7), the overhead housing part (6) receiving the control piston (5) being designed without a supply line. Injektor nach Anspruch 1,
dadurch gekennzeichnet,
daß die einander zugewandten Anlageflächen von Steuerkolben und Ventilelement durch kleine Höcker (13;14) auf der Stirnfläche der beiden Bauteile gebildet sind und daß im Steuerkolben (5) und Ventilelement (8) zentral verlaufende und die Höcker (13;14) durchsetzende Durchgangsbohrungen (5a;8a) als Strömungsverbindung von der Zuführleitung (11) zum Steuerraum (12) vorgesehen sind. Injector according to claim 1,
characterized,
that the mutually facing contact surfaces of the control piston and valve element are formed by small bumps (13; 14) on the end face of the two components and that in the control piston (5) and valve element (8) centrally extending through holes (13; 14) penetrating through bores ( 5a; 8a) are provided as a flow connection from the feed line (11) to the control chamber (12). Injektor nach Anspruch 2,
dadurch gekennzeichnet,
daß die Höcker (13;14) gemeinsam einen Ringraum (15) bilden, der durch eine Leitungsverbindung einerseits mit dem Düsenfederraum (17) und andererseits mit einem Magnetventilraum (16) in Verbindung steht.Injector according to claim 2,
characterized,
that the bumps (13; 14) together form an annular space (15) which is connected by a line connection on the one hand to the nozzle spring space (17) and on the other hand to a solenoid valve space (16). Injektor nach Anspruch 3,
dadurch gekennzeichnet,
daß die Leitungsverbindung zum Magnetventilraum (16) hin sich aus einer von dem Ringraum (15) wegführenden Nut (18) im Gehäuseteil (6) des Steuerkolbens (5) und einer außenwandigen Anflächung (19) dieses Gehäuseteiles (6) sowie zum Düsenfederraum (17) hin aus einer von der Nut (18) abzweigenden Verbindungsbohrung (20) im Gehäuseteil (9) des Ventilelementes (8) zusammensetzt.Injector according to claim 3,
characterized,
that the line connection to the solenoid valve chamber (16) consists of a groove (18) leading away from the annular chamber (15) in the housing part (6) of the control piston (5) and an outer-walled surface (19) of this housing part (6) and to the nozzle spring chamber (17 ) composed of a connecting bore (20) branching off from the groove (18) in the housing part (9) of the valve element (8). Injektor nach Anspruch 1,
dadurch gekennzeichnet,
daß an dem mehrteiligen Injektorgehäuse (7) zum einen der Düsenkörper (2) und eine den Düsenfederraum (17) aufnehmende Druckplatte (21) durch eine Spannhülse (22) mit dem das Ventilelement (8) tragenden Gehäuseteil (9) verspannt sind und zum anderen das Magnetventil (10) und das den Steuerkolben (5) aufnehmende Gehäuseteil (6) über eine weitere Spannhülse (23) mit dem das Ventilelement (8) enthaltende Gehäuseteil (9) verschraubt sind.Injector according to claim 1,
characterized,
that on the multi-part injector housing (7) on the one hand the nozzle body (2) and a pressure plate (21) accommodating the nozzle spring chamber (17) are clamped by a clamping sleeve (22) with the housing part (9) carrying the valve element (8) and on the other the solenoid valve (10) and the housing part (6) receiving the control piston (5) are screwed via a further clamping sleeve (23) to the housing part (9) containing the valve element (8). Injektor nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß im Steuerraum ein Plättchen mit einer zentral liegenden und als Drossel wirkenden Durchgangsbohrung geführt ist, die lediglich bei geöffnetem Magnetventil wirksam ist.Injector according to one of the preceding claims,
characterized,
that a plate is guided in the control chamber with a central through hole acting as a throttle, which is only effective when the solenoid valve is open.
EP98119433A 1997-11-06 1998-10-15 Injector controlled by a magnetic valve for an accumulator system of a multicylinder internal combustion engine Withdrawn EP0915254A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19748999A DE19748999C2 (en) 1997-11-06 1997-11-06 Solenoid valve controlled injector for a storage system of a multi-cylinder internal combustion engine
DE19748999 1997-11-06

Publications (2)

Publication Number Publication Date
EP0915254A2 true EP0915254A2 (en) 1999-05-12
EP0915254A3 EP0915254A3 (en) 2002-07-17

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EP98119433A Withdrawn EP0915254A3 (en) 1997-11-06 1998-10-15 Injector controlled by a magnetic valve for an accumulator system of a multicylinder internal combustion engine

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US (1) US6027047A (en)
EP (1) EP0915254A3 (en)
DE (1) DE19748999C2 (en)

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DE19748999A1 (en) 1999-05-27
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DE19748999C2 (en) 2002-11-07

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