[go: up one dir, main page]

DE19715234A1 - Valve for fuel injection system of internal combustion engine - Google Patents

Valve for fuel injection system of internal combustion engine

Info

Publication number
DE19715234A1
DE19715234A1 DE1997115234 DE19715234A DE19715234A1 DE 19715234 A1 DE19715234 A1 DE 19715234A1 DE 1997115234 DE1997115234 DE 1997115234 DE 19715234 A DE19715234 A DE 19715234A DE 19715234 A1 DE19715234 A1 DE 19715234A1
Authority
DE
Germany
Prior art keywords
valve
pressure
fuel injection
line
injection
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Withdrawn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
DE1997115234
Other languages
German (de)
Inventor
Ulrich Dr Ing Augustin
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE1997115234 priority Critical patent/DE19715234A1/en
Publication of DE19715234A1 publication Critical patent/DE19715234A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—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
    • 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
    • F02M63/0012—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
    • 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
    • F02M63/0045—Three-way valves

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)

Abstract

The valve (1) comprises a valve needle (2) and a coaxial actuating piston (3) which is arranged in a stepped hole (7) of a housing (6) and has a necking (5). The valve has a feedline (10), a control chamber (20), as well as a solenoid valve (21) through which the control chamber is connected with a relief line (22). A throttled connecting line (19) is provided as a bypass between the feedline and the relief line. The connecting line has a leakage valve which communicates with the solenoid valve so that during injection, the connecting line can be cuttof. The leakage valve is arranged with a high-pressure valve provided with valve seats (8,28) on either pressure sides. The leakage and high-pressure valve may be formed as a double-acting ball valve (4).

Description

Die Erfindung betrifft ein magnetventilgesteuertes direktein­ spritzendes Kraftstoffeinspritzventil für Speichereinspritzsys­ teme von mehrzylindrigen Brennkraftmaschinen, mit einer in je­ dem Ventilgehäuse zu einer federbelasteten Düsennadel führenden und durch einen Steuerkolben mit Ventilfunktion absperrbaren Zuführleitung, mit einer in einem Federraum sich abstützenden und die Düsennadel auf ihren Nadelsitz drückenden Düsennadelfe­ der, ferner mit einem auf der Rückseite des unter Systemdruck stehenden Steuerkolbens angeordneten Steuerraum sowie einem Ma­ gnetventil, durch das der Steuerraum mit einer Entlastungslei­ tung verbindbar und gleichzeitig zur Einspritzung die Absper­ rung der zur Düsennadel führenden Zuführleitung durch ein am Steuerkolben angeordnetes Hochdruckventil aufhebbar ist, und mit einer gedrosselten Leitungsverbindung als Bypass zwischen der Zuführleitung und der Entlastungsleitung.The invention relates to a solenoid valve controlled direct injecting fuel injector for accumulator injection systems systems of multi-cylinder internal combustion engines, with one in each leading the valve housing to a spring-loaded nozzle needle and lockable by a control piston with valve function Feed line, with a supported in a spring chamber and the nozzle needle pressing the needle needle onto its needle seat the, further with one on the back of the under system pressure standing control piston arranged control room and a Ma solenoid valve through which the control room with a discharge line connectable and at the same time for the injection the shutoff tion of the supply line leading to the nozzle needle by an am Control piston arranged high pressure valve can be canceled, and with a throttled line connection as a bypass between the supply line and the relief line.

Aus der DE 196 12 738 A1 ist eine Kraftstoffeinspritzanlage mit einem derartigen Kraftstoffeinspritzventil bekannt, bei dem der Steuerkolben in Ventilsitzhöhe einen Ringraum begrenzt, über den die zur Düsennadel führende Zuführleitung mit der in die Entlastungsleitung mündenden Leitungsverbindung verbunden ist. Der Steuerkolben ist mit einem eine Ventilsitzfläche bildenden außenbundähnlichen Kragen versehen, der die Hochdruckverbindung zur Düsennadel steuert. From DE 196 12 738 A1 a fuel injection system is included such a fuel injector is known in which the Control piston at valve seat height limits an annulus, over the the supply line leading to the nozzle needle with the in the Relief line opening line connection is connected. The control piston is formed with a valve seat surface collar-like collar that provides the high-pressure connection controls to the nozzle needle.  

Der Erfindung liegt die Aufgabe zugrunde, bei einem Kraftstoff­ einspritzventil der gattungsgemäßen Art Maßnahmen vorzusehen, mit denen eine Reduzierung der Verlustleistung bzw. Strömungs­ verluste während der Einspritzung erreichbar ist.The invention has for its object in a fuel to provide injection valve of the generic type, with which a reduction of the power loss or flow losses can be achieved during the injection.

Zur Lösung der Aufgabe dienen die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale.To solve the problem serve in the characterizing part of the Claim 1 specified features.

In den Unteransprüchen sind nach förderliche Weiterbildungen der Erfindung angegeben.In the subclaims are further training specified the invention.

Durch die besondere Anordnung eines nur in der Einspritzpause wirkenden Leckageventiles ist es möglich, die Verluste im Sy­ stem herabzusetzen, da das Leckageventil die verlusthaltige Verbindung zwischen der zur Düse führenden Zuführleitung und der zur Niederdruckseite hinführenden Entlastungsleitung auf­ hebt. Ein weiterer Vorteil ist auch dadurch gegeben, daß nach der Einspritzung eine Entlastung der Düse spontan und ungedros­ selt erfolgen kann.Due to the special arrangement of only in the injection break acting leakage valve, it is possible to reduce the losses in the sy stem because the leakage valve is the lossy one Connection between the feed line leading to the nozzle and the discharge line leading to the low pressure side lifts. Another advantage is also given by the fact that after the injection a relief of the nozzle spontaneously and undeterred selt can be done.

Durch die baueinheitliche Zusammenfassung von Leckageventil und Hochdruckventil zu einem doppeltwirkenden Ventil, zum Beispiel Kugelventil, ergibt sich ein sehr geringer Bauraumaufwand bzw. eine gedrängte Bauweise.By combining leakage valve and High pressure valve to a double acting valve, for example Ball valve, there is very little space or a compact construction.

Der Gegenstand der Erfindung ist in der Zeichnung anhand eines Ausführungsbeispieles im folgenden näher beschrieben.The object of the invention is in the drawing using a Embodiment described in more detail below.

Ein magnetventilgesteuertes direkteinspritzendes Kraftstoffein­ spritzventil 1 für nach dem Comman Rail-Prinzip arbeitende Speichereinspritzsysteme von mehrzylindrigen Brennkraftmaschi­ nen umfaßt eine federbelastete Düsennadel 2 und einen räumlich von dieser Düsennadel 2 getrennten Steuerkolben 3 mit einem Hochdruckventil 4. A solenoid valve-controlled direct injection fuel injector 1 for working on the comman rail principle memory injection systems of multi-cylinder internal combustion engines NEN comprises a spring-loaded nozzle needle 2 and a spatially separate from this nozzle needle 2 control piston 3 with a high-pressure valve 4th

Der Steuerkolben 3 hat an seinem der Düsennadel 2 zugewandten hochdruckseitigen Ende einen koaxial zum Steuerkolben 3 ange­ ordneten stiftförmigen Ansatz 5, der durchmessermäßig wesent­ lich kleiner ausgeführt ist.The control piston 3 has at its high pressure-side end facing the nozzle needle 2 a coaxial to the control piston 3 arranged pin-shaped extension 5 , which is designed to be significantly smaller in diameter.

Steuerkolben 3 und Ansatz 5, die einteilig oder zweiteilig aus­ gebildet sein können, sind in einer in einem einzigen Gehäuse­ teil 6 des Kraftstoffeinspritzventiles 1 angeordneten Stufen­ bohrung 7 längsverschiebbar geführt und stehen mit dem Hoch­ druckventil 4 in Wirkverbindung.Control piston 3 and approach 5 , which can be formed in one part or two parts, are in a single housing part 6 of the fuel injector 1 arranged step 7 bore 7 and are operatively connected to the high pressure valve 4 .

Zusätzlich zu dem Hochdruckventil 4 ist nach ein Leckageventil vorgesehen, die baueinheitlich zu einem doppeltwirkenden Kugel­ ventil zusammengefaßt sind, das im Strömungswege des zur Düsen­ nadel 2 geleiteten Kraftstoffstromes liegt. Die Kugel 4a des Kugelventiles ist in der dargestellten Lage durch den hoch­ druckbeaufschlagten Steuerkolben 3 mit seinem stiftförmigen An­ satz 5 auf ihren hochdruckseitigen Ventilsitz 8 gepreßt und verschließt einen Leitungsabschnitt 9 einer zur Düsennadel 2 führenden Zuführleitung 10, die in einen die Düsennadel 2 umge­ benden Druckraum 11 mündet.In addition to the high-pressure valve 4 , a leakage valve is provided, which are combined to form a double-acting ball valve, which lies in the flow paths of the needle 2 directed to the fuel flow. The ball 4 a of the ball valve is pressed in the position shown by the highly pressurized control piston 3 with its pin-shaped set 5 on its high-pressure valve seat 8 and closes a line section 9 of a feed line 10 leading to the nozzle needle 2 , which ends in a nozzle needle 2 vice versa Pressure chamber 11 opens.

Die Kugel 4a ist in einer als Ventilraum 12 ausgebildeten zy­ lindrischen Ausnehmung gelagert, die sich von dem oberen Gehäu­ seteil 6 bis zum unteren Gehäuseteil 13 erstreckt, wobei diese Ausnehmung zwischen der obenliegenden Stufenbohrung 7 und einer untenliegenden Stufenbohrung 14 angeordnet ist. Die auf den Ventilsitz 8 gedrückte Kugel 4a verschließt die durchmessermä­ ßig kleinere Bahrung 14a. Die größere Bahrung bildet einen kleinen Druckspeicher 15, in den eine von der Außenwand 16 des unteren Gehäuseteiles 13 ausgehende Zulaufbohrung 17 mündet. Die Zulaufbohrung 17 steht über eine Hochdruckleitung mit einem Verteilerrohr (Rail) - nicht näher dargestellt - in Verbindung. The ball 4 a is mounted in a valve chamber 12 formed zy-cylindrical recess which extends from the upper hous seteil 6 to the lower housing part 13 , this recess being arranged between the overlying stepped bore 7 and an underneath stepped bore 14 . The ball 4 a pressed onto the valve seat 8 closes the smaller diameter bore 14 a. The larger bore forms a small pressure accumulator 15 , into which an inlet bore 17 opening from the outer wall 16 of the lower housing part 13 opens. The inlet bore 17 is connected via a high-pressure line to a distributor pipe (rail) - not shown in detail.

Von der Zulaufbohrung 17 zweigt eine mit einer Drossel 18 ver­ sehene Verbindungsleitung 19 ab, die zu einem Steuerraum 20 auf der Rückseite des Steuerkolbens 3 hinführt. Dieser Steuer­ raum 20 steht unter Systemdruck, solange ein Magnetventil 21 eine mit einer Entlastungsleitung 22 verbindbare und von dem Steuerraum 20 ausgehende Ablaufdrossel 23 geschlossen hält (wie dargestellt).From the inlet bore 17 branches off with a throttle 18 ver seen connecting line 19 which leads to a control chamber 20 on the rear of the control piston 3 . This control room 20 is under system pressure, as long as a solenoid valve 21 holds a connectable to a relief line 22 and outgoing from the control chamber 20 outlet throttle 23 (as shown).

Der stiftförmige Ansatz 5 ist in seinem oberen Bereich von ei­ nem Ringraum 24 umgeben, welcher durch eine Rücklaufleitung 25 mit der Entlastungsleitung 22 ständig verbunden ist.The pin-shaped extension 5 is surrounded in its upper region by egg nem annular space 24 which is continuously connected to the relief line 22 by a return line 25 .

Die Zulaufbohrung 17 ist von der Zuführleitung 10 durch das ge­ schlossen gehaltene Kugelventil abgetrennt, es erfolgt keine Einspritzung, jedoch ist die neben den hochdruckseitigen Ven­ tilsitz 8 in die zylindrische Ausnehmung 12 einmündende Zuführ­ leitung 10 über einen durch die Kugel 4a und der Wandung 12a der Ausnehmung 12 gebildeten Ringspalt 26 sowie über einen wei­ teren Ringspalt 27 am stiftförmigen Ansatz 5 und über den Ring­ raum 24 und die Rücklaufleitung 25 druckentlastet.The inlet bore 17 is separated from the supply line 10 by the closed ball valve GE, there is no injection, but the valve seat 8 opening into the cylindrical recess 12 in addition to the high-pressure side Ven is a supply line 10 via a through the ball 4 a and the wall 12th a of the recess 12 formed annular gap 26 and via a white annular gap 27 on the pin-shaped extension 5 and the annular space 24 and the return line 25 relieved of pressure.

Sobald das Magnetventil 21 aktiviert wird, bewegt sich der Steuerkolben 3 durch die Druckentlastung im Steuerraum 20 nach oben und die Kugel 4a des doppeltwirkende Kugelventiles legt sich an ihren niederdruckseitigen Ventilsitz 28 am oberen Ge­ häuseteil 6 an, verschließt somit die Stufenbohrung 7 und gibt damit lediglich eine Strömungsverbindung von der Zulaufbohrung 17 zur Düsennadel 2 frei. Die Einspritzung erfolgt.As soon as the solenoid valve 21 is activated, the control piston 3 moves upwards through the pressure relief in the control chamber 20 and the ball 4 a of the double-acting ball valve rests on its low-pressure side valve seat 28 on the upper housing part 6 , thus closes the stepped bore 7 and thus gives it only one flow connection from the inlet bore 17 to the nozzle needle 2 is free. The injection takes place.

Während der Einspritzung gibt es somit keinen Bypass von der Zu­ führleitung 10 über den Ventil- und Ringraum zur Entlastungs­ leitung 22.During the injection there is therefore no bypass from the supply line 10 to the valve and annulus to the relief line 22 .

Claims (6)

1. Magnetventilgesteuertes direkteinspritzendes Kraftstoffein­ spritzventil für Speichereinspritzsysteme von mehrzylindrigen Brennkraftmaschinen, mit einer in jedem Ventilgehäuse zu einer federbelasteten Düsennadel führenden und durch einen Steuerkol­ ben mit Ventilfunktion absperrbaren Zuführleitung, mit einer in einem Federraum sich abstützenden und die Düsennadel auf ihren Nadelsitz drückenden Düsennadelfeder, ferner mit einem auf der Rückseite des unter Systemdruck stehenden Steuerkolbens ange­ ordneten Steuerraum sowie einem Magnetventil, durch das der Steuerraum mit einer Entlastungsleitung verbindbar und gleich­ zeitig zur Einspritzung die Absperrung der zur Düsennadel füh­ renden Zuführleitung durch ein am Steuerkolben angeordnetes Hochdruckventil aufhebbar ist, und mit einer gedrosselten Lei­ tungsverbindung als Bypass zwischen der Zuführleitung und der Entlastungsleitung, dadurch gekennzeichnet, daß die Leitungsverbindung ein mit dem Magnetventil (21) in Wirkverbindung stehendes Leckageventil enthält, durch das wäh­ rend der Einspritzung die Leitungsverbindung unterbrechbar ist.1. Solenoid valve-controlled direct-injection fuel injection valve for accumulator injection systems of multi-cylinder internal combustion engines, with a supply line leading to a spring-loaded nozzle needle in each valve housing and which can be shut off by a control piston with valve function, with a nozzle needle spring which is supported in a spring chamber and presses the nozzle needle onto its needle seat, also with a control chamber located on the rear of the control piston under system pressure and a solenoid valve through which the control chamber can be connected to a relief line and, at the same time as the injection, the shut-off of the supply line leading to the nozzle needle can be released by a high-pressure valve arranged on the control piston, and with a throttled valve Lei line connection as a bypass between the feed line and the relief line, characterized in that the line connection with the solenoid valve ( 21 ) in operative connection contains a leakage valve through which the line connection can be interrupted during injection. 2. Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß das Hochdruckventil und das Leckageventil baueinheitlich zusammengefaßt sind und als Baueinheit einander gegenüberlie­ gende hochdruckseitige und niederdruckseitige Ventilsitze (8, 28) aufweisen. 2. Fuel injection valve according to claim 1, characterized in that the high-pressure valve and the leakage valve are combined in a structural unit and have as a unit against each other lying high-pressure and low-pressure valve seats ( 8 , 28 ). 3. Kraftstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß das Hochdruckventil und das Leckageventil ein doppeltwir­ kendes Kugelventil (4) bilden.3. Fuel injection valve according to claim 2, characterized in that the high pressure valve and the leakage valve form a double-acting ball valve ( 4 ). 4. Kraftstoffeinspritzventil nach den Ansprüchen 1 und 3, dadurch gekennzeichnet, daß das Kugelventil (4) in einem Ventilraum (21) einen Ring­ spalt (26) längsverschiebbar geführt ist und daß ein stiftförmi­ ger Ansatz (5) am Steuerkolben (3) bei deaktiviertem Magnetven­ til (21) das Kugelventil (4) auf seinen hochdruckseitigen Ven­ tilsitz (8) drückt.4. Fuel injection valve according to claims 1 and 3, characterized in that the ball valve ( 4 ) in a valve chamber ( 21 ) an annular gap ( 26 ) is guided in a longitudinally displaceable manner and that a stift-shaped approach ( 5 ) on the control piston ( 3 ) when deactivated Solenoid valve ( 21 ) presses the ball valve ( 4 ) onto its high-pressure side valve seat ( 8 ). 5. Kraftstoffeinspritzventil nach Anspruch 4, dadurch gekennzeichnet, daß das Kugelventil (4) bei aktiviertem Magnetventil (21) auf seinem niederdruckseitigen Ventilsitz (28) aufliegt.5. Fuel injection valve according to claim 4, characterized in that the ball valve ( 4 ) rests on its low-pressure valve seat ( 28 ) when the solenoid valve ( 21 ) is activated. 6. Kraftstoffeinspritzventil nach 4, dadurch gekennzeichnet, daß der stiftförmige Ansatz (5) in einem den niederdruckseiti­ gen Ventilsitz (20) bildenden Gehäuseteil (6) unter Bildung ei­ nes Strömungsspaltes (27) längsverschiebbar geführt ist und ge­ meinsam mit dem Steuerkolben (3) einen Ringraum (24) begrenzt, von dem ausgehend die als Bypass in der Einspritzpause wirkende Leitungsverbindung zu der Entlastungsleitung (22) hinführt.6. Fuel injection valve according to 4, characterized in that the pin-shaped projection ( 5 ) in a valve part ( 20 ) forming the low pressure side ( 20 ) forming the housing part ( 6 ) is guided so as to be longitudinally displaceable with formation of a flow gap ( 27 ) and together with the control piston ( 3 ) defines an annular space ( 24 ), from which the line connection acting as a bypass during the injection break leads to the relief line ( 22 ).
DE1997115234 1997-04-12 1997-04-12 Valve for fuel injection system of internal combustion engine Withdrawn DE19715234A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997115234 DE19715234A1 (en) 1997-04-12 1997-04-12 Valve for fuel injection system of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997115234 DE19715234A1 (en) 1997-04-12 1997-04-12 Valve for fuel injection system of internal combustion engine

Publications (1)

Publication Number Publication Date
DE19715234A1 true DE19715234A1 (en) 1998-06-25

Family

ID=7826277

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997115234 Withdrawn DE19715234A1 (en) 1997-04-12 1997-04-12 Valve for fuel injection system of internal combustion engine

Country Status (1)

Country Link
DE (1) DE19715234A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0995898A2 (en) * 1998-10-22 2000-04-26 Lucas Industries Limited Fuel system
WO2001000986A1 (en) * 1999-06-24 2001-01-04 Robert Bosch Gmbh Common rail injector
WO2001029410A1 (en) * 1999-10-21 2001-04-26 Robert Bosch Gmbh High pressure fuel injector with a hydraulically controlled plate cam
EP1036931A3 (en) * 1999-03-16 2001-09-19 Delphi Technologies, Inc. Fuel injector arrangement
WO2001050007A3 (en) * 1999-12-31 2001-12-27 Bosch Gmbh Robert Control valve comprising an actuator guided by a tappet, for an injector in a fuel injection system
DE10031583A1 (en) * 2000-06-29 2002-01-17 Bosch Gmbh Robert High pressure resistant injector with spherical valve element
DE10046662A1 (en) * 2000-09-20 2002-04-04 Bosch Gmbh Robert Control system, for pressurised fluid injection, has pressure valve to generate pressure in dosing valve for supply and two stage return lines.
FR2816367A1 (en) * 2000-11-07 2002-05-10 Bosch Gmbh Robert Injector for injecting high pressure fuel into combustion chamber of IC engine has ball valves with opposing effect on either side of control component
DE10055267A1 (en) * 2000-11-08 2002-05-23 Bosch Gmbh Robert Pressure controlled injector for high injection with slide throttles
DE10056165A1 (en) * 2000-11-13 2002-05-23 Bosch Gmbh Robert Fuel injector, for internal combustion engine, has dual supply to discharge nozzle from valve controlled primary chamber and second chamber, both discharging through output needle nozzle.
WO2002090759A1 (en) * 2001-05-08 2002-11-14 Robert Bosch Gmbh Leak-reduced pressure-controlled fuel injector
WO2003004859A1 (en) 2001-06-29 2003-01-16 Robert Bosch Gmbh Fuel injector comprising a high-pressure resistant optimized control space
WO2003004858A1 (en) 2001-06-29 2003-01-16 Robert Bosch Gmbh Fuel injector having a variable control space pressurization
US6816050B2 (en) 2001-10-22 2004-11-09 Robert Bosch Gmbh Size-reduced magnet coil carrier
DE102011103262A1 (en) 2011-06-01 2012-12-06 Golle Motor Gmbh Injector for diesel and gasoline direct injection systems of combustion engines, comprises control piston, which is directly connected with nozzle needle, where nozzle needle is arranged in control sleeve in longitudinally movable manner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199632A1 (en) * 1985-04-19 1986-10-29 Societe Alsacienne De Constructions Mecaniques De Mulhouse Fuel injection system for diesel engines
DE4341543A1 (en) * 1993-12-07 1995-06-08 Bosch Gmbh Robert Fuel injection device for internal combustion engines
US5526791A (en) * 1995-06-07 1996-06-18 Diesel Technology Company High-pressure electromagnetic fuel injector
DE19612738A1 (en) * 1995-04-05 1996-10-10 Avl Verbrennungskraft Messtech Fuel injection system for IC engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199632A1 (en) * 1985-04-19 1986-10-29 Societe Alsacienne De Constructions Mecaniques De Mulhouse Fuel injection system for diesel engines
DE4341543A1 (en) * 1993-12-07 1995-06-08 Bosch Gmbh Robert Fuel injection device for internal combustion engines
DE19612738A1 (en) * 1995-04-05 1996-10-10 Avl Verbrennungskraft Messtech Fuel injection system for IC engine
US5526791A (en) * 1995-06-07 1996-06-18 Diesel Technology Company High-pressure electromagnetic fuel injector

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6460515B2 (en) 1998-10-22 2002-10-08 Lucas Industries Limited Fuel system
EP0995898A3 (en) * 1998-10-22 2001-08-01 Delphi Technologies, Inc. Fuel system
EP0995898A2 (en) * 1998-10-22 2000-04-26 Lucas Industries Limited Fuel system
EP1036931A3 (en) * 1999-03-16 2001-09-19 Delphi Technologies, Inc. Fuel injector arrangement
US6877483B2 (en) 1999-03-16 2005-04-12 James Martin Anderton Askew Fuel injector arrangement
WO2001000986A1 (en) * 1999-06-24 2001-01-04 Robert Bosch Gmbh Common rail injector
DE19928906A1 (en) * 1999-06-24 2001-01-11 Bosch Gmbh Robert Common rail injector
US6561165B1 (en) 1999-06-24 2003-05-13 Robert Bosch Gmbh Common rail injector
WO2001029410A1 (en) * 1999-10-21 2001-04-26 Robert Bosch Gmbh High pressure fuel injector with a hydraulically controlled plate cam
WO2001050007A3 (en) * 1999-12-31 2001-12-27 Bosch Gmbh Robert Control valve comprising an actuator guided by a tappet, for an injector in a fuel injection system
DE10031583A1 (en) * 2000-06-29 2002-01-17 Bosch Gmbh Robert High pressure resistant injector with spherical valve element
DE10046662A1 (en) * 2000-09-20 2002-04-04 Bosch Gmbh Robert Control system, for pressurised fluid injection, has pressure valve to generate pressure in dosing valve for supply and two stage return lines.
DE10046662B4 (en) * 2000-09-20 2004-09-30 Robert Bosch Gmbh Fuel injection valve with a pressure control valve
DE10054991A1 (en) * 2000-11-07 2002-05-29 Bosch Gmbh Robert Pressure controlled injector for injecting fuel with double valve
FR2816367A1 (en) * 2000-11-07 2002-05-10 Bosch Gmbh Robert Injector for injecting high pressure fuel into combustion chamber of IC engine has ball valves with opposing effect on either side of control component
DE10055267B4 (en) * 2000-11-08 2004-07-29 Robert Bosch Gmbh Pressure-controlled injector for high injection with slide throttles
DE10055267A1 (en) * 2000-11-08 2002-05-23 Bosch Gmbh Robert Pressure controlled injector for high injection with slide throttles
DE10056165C2 (en) * 2000-11-13 2003-06-12 Bosch Gmbh Robert Sammelraumbeaufschlagter injector with a cascade control arrangement
DE10056165A1 (en) * 2000-11-13 2002-05-23 Bosch Gmbh Robert Fuel injector, for internal combustion engine, has dual supply to discharge nozzle from valve controlled primary chamber and second chamber, both discharging through output needle nozzle.
DE10122245A1 (en) * 2001-05-08 2002-12-12 Bosch Gmbh Robert Leakage-reduced pressure-controlled fuel injector
WO2002090759A1 (en) * 2001-05-08 2002-11-14 Robert Bosch Gmbh Leak-reduced pressure-controlled fuel injector
WO2003004858A1 (en) 2001-06-29 2003-01-16 Robert Bosch Gmbh Fuel injector having a variable control space pressurization
WO2003004859A1 (en) 2001-06-29 2003-01-16 Robert Bosch Gmbh Fuel injector comprising a high-pressure resistant optimized control space
US6816050B2 (en) 2001-10-22 2004-11-09 Robert Bosch Gmbh Size-reduced magnet coil carrier
DE102011103262A1 (en) 2011-06-01 2012-12-06 Golle Motor Gmbh Injector for diesel and gasoline direct injection systems of combustion engines, comprises control piston, which is directly connected with nozzle needle, where nozzle needle is arranged in control sleeve in longitudinally movable manner

Similar Documents

Publication Publication Date Title
EP1125049B1 (en) Combined stroke/pressure controlled fuel injection method and system for an internal combustion engine
DE19519191C2 (en) Injector
DE19519192C1 (en) Injector
EP1520096B1 (en) Common rail injection system comprising a variable injector and booster device
DE19528792C1 (en) Brake for diesel engine
DE19715234A1 (en) Valve for fuel injection system of internal combustion engine
DE4445586A1 (en) Method for reducing fuel pressure in a fuel injector
DE19939418A1 (en) Fuel injection system for an internal combustion engine
EP1125045B1 (en) Fuel injection system for an internal combustion engine
DE2235083A1 (en) FUEL INJECTION NOZZLE FOR COMBUSTION MACHINES
DE10315016A1 (en) Fuel injector with a leak-free servo valve
EP1867868B1 (en) Fuel injector with safety operating valve
EP1121527B1 (en) Fuel injection device
DE19939423A1 (en) Fuel injection system for an internal combustion engine
DE10033428C2 (en) Pressure controlled injector for injecting fuel
DE19939425B4 (en) Fuel injection system for an internal combustion engine
WO2005015000A1 (en) Control valve with pressure compensation for a fuel injector comprising a pressure intensifier
EP1421272B1 (en) Fuel-injection device for internal combustion engines
DE19732070C2 (en) Direct-injection fuel injector with solenoid valve control for a multi-cylinder internal combustion engine
EP1354133B1 (en) Fuel-injection device
DE10031278A1 (en) Fuel injection device for internal combustion engines
DE10055269B4 (en) Pressure-controlled injector with pressure boost
DE10132248C2 (en) Fuel injector with 2-way valve control
EP1392965A1 (en) Pressure amplifier for a fuel injection device
DE19942291A1 (en) Fuel injection valve has a drilled pressure relief piston in the fuel return channel to the fuel tank to give a controlled flow and reduce nitrogen oxide and noise emissions with a lower injection pressure

Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal