EP1567764A1 - Fuel injection device with a 3-way control valve for configuring the injection process - Google Patents

Fuel injection device with a 3-way control valve for configuring the injection process

Info

Publication number
EP1567764A1
EP1567764A1 EP03740044A EP03740044A EP1567764A1 EP 1567764 A1 EP1567764 A1 EP 1567764A1 EP 03740044 A EP03740044 A EP 03740044A EP 03740044 A EP03740044 A EP 03740044A EP 1567764 A1 EP1567764 A1 EP 1567764A1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure side
fuel injection
throttle
injection device
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.)
Granted
Application number
EP03740044A
Other languages
German (de)
French (fr)
Other versions
EP1567764B1 (en
Inventor
Friedrich Boecking
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 EP1567764A1 publication Critical patent/EP1567764A1/en
Application granted granted Critical
Publication of EP1567764B1 publication Critical patent/EP1567764B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow

Definitions

  • the invention proceeds from a fuel injector according to the preamble of claim 1.
  • a fuel injector according to the preamble of claim 1.
  • the nozzle needle of an Kraft fürinsp ⁇ 'tzventils dependent opened by the pressure prevailing in a control chamber pressure, or closed.
  • the control chamber which is permanently connected to the high-pressure side, can be connected to the low-pressure side by means of a 2/2-way control valve designed as a double-seat valve and can thus be relieved of pressure.
  • injection course shaping is not possible with this fuel injection device.
  • the fuel injection device according to the invention with the characterizing features of patent claim 1 has the advantage that the pressure prevailing in the control chamber is reduced at different speeds by activating or deactivating the flow restrictor, and therefore an injection curve can be shaped.
  • FIG. 1 shows the fuel injection device according to the invention with a double-seat valve controlling the pressure in a control chamber in its upper valve position
  • FIG. 2 shows the double seat valve of FIG. 1 in its middle valve position
  • Fig. 3 shows the double seat valve of Figure 1 in its lower valve position.
  • Fig. 4 shows the fuel injection device of Fig. 1 with an additional inlet throttle.
  • the fuel injection device 1 according to the invention shown in FIG. 1 is usually used in an internal combustion engine with a plurality of cylinders, with each of these cylinders being assigned a fuel injection valve (injector).
  • This injector has, in a manner known per se, an injector nozzle, not shown here, which projects into a cylinder combustion chamber of the internal combustion engine, and an injector needle 3 which opens and closes the injector depending on the pressure in a control chamber 2 and is only indicated to a small extent here.
  • the control room 2 is permanently connected to a high-pressure inlet line (high-pressure side) 5 via an inlet throttle 4.
  • a 3/3-way control valve 6 in the form of a double-seat valve is provided, which opens or blocks the connection of the control chamber 2 with a low-pressure drain line (low-pressure side) 7.
  • the high-pressure inlet line 5 can be connected to a high-pressure reservoir (common rail), not shown, and the low-pressure outlet line 7 can be connected to leakage oil.
  • An outlet throttle 8 is arranged in the low-pressure outlet line 7.
  • the control valve 6 has a valve body 9 designed as a valve ball, which is located in a valve chamber 10 between two coaxial annular valve seats 11, 12 by means of a e.g. piezoelectric actuator 13 is axially adjustable.
  • the lower valve seat 11 in FIG. 1 is provided between a first drain channel 14 of the control chamber 2 and the valve chamber 9 and the upper valve seat 12 between the valve chamber 9 and the low-pressure drain line 7.
  • the valve chamber 9 is permanently connected to the second outlet channel 16 via an outlet throttle 15
  • the high-pressure side throttle 15 having a higher throttle resistance, for example a smaller throttle opening, than the low-pressure side throttle 8.
  • the valve body 9 can be moved into an upper, middle or lower valve position by means of the actuator 13.
  • the valve opening of the upper valve seat 12 is closed by the valve body 9 and the valve opening of the lower valve seat 11 is opened, so that the connection of the control chamber 2 to the low-pressure side is blocked.
  • the high pressure prevailing in the control chamber 2 acts on a control surface 17 of the nozzle needle 3 acting in the closing direction of the nozzle needle 3, so that the nozzle needle 3 or the fuel injection valve are closed.
  • valve body 9 In the middle valve position shown in FIG. 2, the valve body 9 is located between the two valve seats 11, 12, so that the valve openings of the two valve seats 11, 12 are open.
  • the control chamber 2 is connected to the low-pressure discharge line 7 via both discharge channels 14, 16, so that the pressure prevailing in the control chamber 2 is reduced and the nozzle needle 3 or the fuel injection valve open. Because of the discharge throttle 15, the pressure reduction from the control chamber 2 into the valve chamber 10 takes place mainly via the first relief channel 14, so that the pressure reduction rate is primarily determined by the discharge throttle 8 on the low-pressure side.
  • valve body 9 closes the valve opening of the lower valve seat 11, as a result of which the pressure reduction from the control chamber 2 into the valve chamber 10 takes place solely via the second relief channel 16. Because of its higher throttle resistance, the pressure reduction rate is primarily determined by the discharge throttle 15 on the low-pressure side.
  • the variant shown in FIG. 4 differs from the fuel injection device of FIG. 1 in that the first outlet channel 14 is connected directly to the inlet line 5 via a further inlet throttle 18.
  • this inlet throttle 18 acts as a bypass.
  • the inlet throttle 18 acts in series with the outlet throttle 15 on the high-pressure side, which can thereby be very finely coordinated with the two inlet throttles 4, 18.

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 invention relates to a fuel injection device (1) for internal combustion engines, comprising a control valve (6) arranged between a high and a low pressure sides (5, 7), said control valve opening or blocking the connection of a control chamber (2) to the low pressure side (7). Said device also comprises a discharge throttle (8) arranged between the control valve (6) and the low pressure side (7). The control valve (6) has a first position in which the connection of the control chamber (2) to the low pressure side (7) is blocked, a second position in which the control chamber (2) is connected to the low pressure side (7) by means of a first discharge channel (14) and a third position in which the control chamber (2) is connected to the low pressure side (7) by means of a second discharge channel (16) having a discharge throttle (15).

Description

Kraftstoffeinspritzvorrichtung mit einem 3/3-Weqe-Steueπtentil zur EinspritzverlaufsformunqFuel injection device with a 3/3-way control valve for the injection course
Stand der TechnikState of the art
Die Erfindung geht aus von einer Kraftstoffeinspritzvorrichtung nach der Gattung des Patentanspruchs 1. Bei solch einer z.B. durch die DE 100 39 215 A1 bekannten Kraftstoffeinspritzvorrichtung wird die Düsennadel eines Kraftstoffeinspπ'tzventils abhängig von dem in einem Steuerraum herrschenden Druck geöffnet oder geschlossen. Der permanent an die Hochdruckseite angeschlossene Steuerraum kann mittels eines als Doppelsitzventil ausgebildeten 2/2-Wege-Steuerventils mit der Niederdruckseite verbunden und dadurch druckentlastet werden. Bei dieser Kraftstoffeinspritzvorrichtung ist eine Einspritzverlaufsformung allerdings nicht möglich.The invention proceeds from a fuel injector according to the preamble of claim 1. In such an example, by DE 100 39 215 A1 known fuel injector, the nozzle needle of an Kraftstoffeinspπ 'tzventils dependent opened by the pressure prevailing in a control chamber pressure, or closed. The control chamber, which is permanently connected to the high-pressure side, can be connected to the low-pressure side by means of a 2/2-way control valve designed as a double-seat valve and can thus be relieved of pressure. However, injection course shaping is not possible with this fuel injection device.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Kraftstoffeinspritzvorrichtung mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vorteil, dass der im Steuerraum herrschende Druck durch Aktivieren oder Deaktivieren der Ablaufdrossel unterschiedlich schnell abgebaut wird und daher eine Einspritzverlaufsformung durchgeführt werden kann.The fuel injection device according to the invention with the characterizing features of patent claim 1 has the advantage that the pressure prevailing in the control chamber is reduced at different speeds by activating or deactivating the flow restrictor, and therefore an injection curve can be shaped.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous configurations of the subject matter of the invention can be found in the description, the drawing and the claims.
Zeichnungdrawing
Zwei bevorzugte Ausführungsbeispiele der erfindungsgemäßen Kraftstoffeinspritzvorrichtung mit einem als Doppelsitzventil ausgestalteten 3/3- Wege-Steuerventil sind in der Zeichnung schematisch dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:Two preferred exemplary embodiments of the fuel injection device according to the invention with a 3/3-way control valve designed as a double seat valve are shown schematically in the drawing and explained in more detail in the description below. Show it:
Fig. 1 die erfindungsgemäße Kraftstoffeinspritzvorrichtung mit einem den Druck in einem Steuerraum steuernden Doppelsitzventil in seiner oberen Ventilposition;1 shows the fuel injection device according to the invention with a double-seat valve controlling the pressure in a control chamber in its upper valve position;
Fig. 2 das Doppelsitzventil der Fig. 1 in seiner mittleren Ventilposition;FIG. 2 shows the double seat valve of FIG. 1 in its middle valve position;
Fig. 3 das Doppelsitzventil der Fig. 1 in seiner unteren Ventilposition; Fig. 4 die Kraftstoffeinspritzvorrichtung der Fig. 1 mit einer zusätzlichen Zulaufdrossel.Fig. 3 shows the double seat valve of Figure 1 in its lower valve position. Fig. 4 shows the fuel injection device of Fig. 1 with an additional inlet throttle.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Die in Fig. 1 gezeigte erfindungsgemäße Kraftstoffeinspritzvorrichtung 1 wird üblicherweise bei einer Brennkraftmaschine mit mehreren Zylindern verwendet, wobei jedem dieser Zylinder ein Kraftstoffeinspritzventil (Injektor) zugeordnet ist. Dieser Injektor weist in an sich bekannter Weise eine in einen Zylinderbrennraum der Brennkraftmaschine ragende, hier nicht näher dargestellte Einspritzdüse sowie eine die Einspritzdüse abhängig vom Druck in einem Steuerraum 2 öffnende und schließende, hier nur zu einem kleinen Teil angedeutete Düsennadel 3 auf.The fuel injection device 1 according to the invention shown in FIG. 1 is usually used in an internal combustion engine with a plurality of cylinders, with each of these cylinders being assigned a fuel injection valve (injector). This injector has, in a manner known per se, an injector nozzle, not shown here, which projects into a cylinder combustion chamber of the internal combustion engine, and an injector needle 3 which opens and closes the injector depending on the pressure in a control chamber 2 and is only indicated to a small extent here.
Der Steuerraum 2 ist über eine Zulaufdrossel 4 dauerhaft an eine Hochdruck- Zulaufleitung (Hochdruckseite) 5 angeschlossen. Zum Steuern des Einspritzvorgangs ist ein 3/3-Wege-Steuerventil 6 in Form eines Doppelsitzventils vorgesehen, das die Verbindung des Steuerraums 2 mit einer Niederdruck- Ablaufleitung (Niederdruckseite) 7 öffnet oder sperrt. Die Hochdruck-Zulaufleitung 5 kann mit einem nicht gezeigten Hochdruckspeicher (Common Rail) und die Niederdruck-Ablaufleitung 7 mit Lecköl verbunden sein. In der Niederdruck- Ablaufleitung 7 ist eine Ablaufdrossel 8 angeordnet.The control room 2 is permanently connected to a high-pressure inlet line (high-pressure side) 5 via an inlet throttle 4. To control the injection process, a 3/3-way control valve 6 in the form of a double-seat valve is provided, which opens or blocks the connection of the control chamber 2 with a low-pressure drain line (low-pressure side) 7. The high-pressure inlet line 5 can be connected to a high-pressure reservoir (common rail), not shown, and the low-pressure outlet line 7 can be connected to leakage oil. An outlet throttle 8 is arranged in the low-pressure outlet line 7.
Das Steuerventil 6 hat einen als Ventilkugel ausgebildeten Ventilkörper 9, der in einer Ventilkammer 10 zwischen zwei koaxialen ringförmigen Ventilsitzen 11, 12 mittels eines z.B. piezoelektrischen Stellantriebs 13 axial verstellbar ist. Der in Fig. 1 untere Ventilsitz 11 ist zwischen einem ersten Ablaufkanal 14 des Steuerraums 2 und der Ventilkammer 9 und der obere Ventilsitz 12 zwischen Ventilkammer 9 und Niederdruck-Ablaufleitung 7 vorgesehen. Die Ventilkammer 9 ist über einen eine Ablaufdrossel 15 aufweisenden zweiten Ablaufkanal 16 dauerhaft an denThe control valve 6 has a valve body 9 designed as a valve ball, which is located in a valve chamber 10 between two coaxial annular valve seats 11, 12 by means of a e.g. piezoelectric actuator 13 is axially adjustable. The lower valve seat 11 in FIG. 1 is provided between a first drain channel 14 of the control chamber 2 and the valve chamber 9 and the upper valve seat 12 between the valve chamber 9 and the low-pressure drain line 7. The valve chamber 9 is permanently connected to the second outlet channel 16 via an outlet throttle 15
Steuerraum 2 angeschlossen, wobei die hochdruckseitige Ablaufdrossel 15 einen höheren Drosselwiderstand, z.B. eine kleinere Drosselöffnung, als die niederdruckseitige Ablaufdrossel 8 hat. Mittels des Stellantriebs 13 kann der Ventilkörper 9 in eine obere, mittlere oder untere Ventilposition verschoben werden. In der in Fig. 1 gezeigten oberen Ventilposition des Ventilkörpers 9 ist die Ventilöffnung des oberen Ventilsitzes 12 durch den Ventilkörper 9 verschlossen und die Ventilöffnung des unteren Ventilsitzes 11 geöffnet, so dass die Verbindung des Steuerraums 2 zur Niederdruckseite gesperrt ist. Der im Steuerraum 2 herrschende Hochdruck greift an einer in Schließrichtung der Düsennadel 3 wirkenden Steuerfläche 17 der Düsennadel 3 an, so dass die Düsennadel 3 bzw. das Kraftstoffeinspritzventil geschlossen sind.Control room 2 connected, the high-pressure side throttle 15 having a higher throttle resistance, for example a smaller throttle opening, than the low-pressure side throttle 8. The valve body 9 can be moved into an upper, middle or lower valve position by means of the actuator 13. In the upper valve position of the valve body 9 shown in FIG. 1, the valve opening of the upper valve seat 12 is closed by the valve body 9 and the valve opening of the lower valve seat 11 is opened, so that the connection of the control chamber 2 to the low-pressure side is blocked. The high pressure prevailing in the control chamber 2 acts on a control surface 17 of the nozzle needle 3 acting in the closing direction of the nozzle needle 3, so that the nozzle needle 3 or the fuel injection valve are closed.
In der in Fig. 2 gezeigten mittleren Ventilposition befindet sich der Ventilkörper 9 zwischen beiden Ventilsitzen 11, 12, so dass die Ventilöffnungen der beiden Ventilsitze 11 , 12 geöffnet sind. Der Steuerraums 2 ist über beide Ablaufkanäle 14, 16 mit der Niederdruck-Ablaufleitung 7 verbunden, so dass der im Steuerraum 2 herrschende Druck abgesenkt wird und die Düsennadel 3 bzw. das Kraftstoffeinspritzventil öffnen. Wegen der Ablaufdrossel 15 erfolgt dabei der Druckabbau vom Steuerraum 2 in die Ventilkammer 10 hauptsächlich über den ersten Entlastungskanal 14, so dass die Druckabbaugeschwindigkeit primär durch die niederdruckseitige Ablaufdrossel 8 bestimmt ist.In the middle valve position shown in FIG. 2, the valve body 9 is located between the two valve seats 11, 12, so that the valve openings of the two valve seats 11, 12 are open. The control chamber 2 is connected to the low-pressure discharge line 7 via both discharge channels 14, 16, so that the pressure prevailing in the control chamber 2 is reduced and the nozzle needle 3 or the fuel injection valve open. Because of the discharge throttle 15, the pressure reduction from the control chamber 2 into the valve chamber 10 takes place mainly via the first relief channel 14, so that the pressure reduction rate is primarily determined by the discharge throttle 8 on the low-pressure side.
In seiner in Fig. 3 gezeigten unteren Ventilposition verschließt der Ventilkörpers 9 die Ventilöffnung des unteren Ventilsitzes 11 , wodurch der Druckabbau vom Steuerraum 2 in die Ventilkammer 10 allein über den zweiten Entlastungskanal 16 erfolgt. Die Druckabbaugeschwindigkeit ist wegen ihres höheren Drosselwiderstands primär durch die hochniederdruckseitige Ablaufdrossel 15 bestimmt.In its lower valve position shown in FIG. 3, the valve body 9 closes the valve opening of the lower valve seat 11, as a result of which the pressure reduction from the control chamber 2 into the valve chamber 10 takes place solely via the second relief channel 16. Because of its higher throttle resistance, the pressure reduction rate is primarily determined by the discharge throttle 15 on the low-pressure side.
Da der im Steuerraum 2 herrschende Druck in der mittleren und der unteren Ventilposition des Ventilkörpers 9 unterschiedlich schnell abgebaut wird, kann durch geeignete Kombination der beiden Ablaufdrosseln 8, 15 und der Zulaufdrossel 4 eine gewünschte Einspritzverlaufsformung mittels des Steuerventils 6 eingestellt werden.Since the pressure prevailing in the control chamber 2 in the middle and the lower valve position of the valve body 9 is reduced at different speeds, a suitable combination of the two outlet throttles 8, 15 and the inlet throttle 4 can be used to set a desired injection profile by means of the control valve 6.
Von der Kraftstoffeinspritzvorrichtung der Fig. 1 unterscheidet sich die in Fig. 4 gezeigte Variante dadurch, dass der erste Ablaufkanalkanal 14 über eine weitere Zulaufdrossel 18 direkt an die Zulaufleitung 5 angeschlossen ist. In der unteren und mittleren Ventilposition des Ventilkörpers 9 wirkt diese Zulaufdrossel 18 als Bypass. In der unteren Ventilposition des Ventilkörpers 9 wirkt die Zulaufdrossel 18 in Reihe zur hochdruckseitigen Ablaufdrossel 15, die dadurch zu den beiden Zulaufdrosseln 4, 18 sehr fein abgestimmt werden kann. Beim Übergang des Ventilkörpers 9 in seine obere Ventilposition bewirkt die Zulaufdrossel 18, da der Druck im ersten Entlastungskanal 14 langsamer abgebaut wird, eine zusätzliche Schließkraft in Richtung auf die erste Ventilposition, so dass das Steuerventil 6 schneller schließt. The variant shown in FIG. 4 differs from the fuel injection device of FIG. 1 in that the first outlet channel 14 is connected directly to the inlet line 5 via a further inlet throttle 18. In the lower and middle valve position of the valve body 9, this inlet throttle 18 acts as a bypass. In the lower valve position of the valve body 9, the inlet throttle 18 acts in series with the outlet throttle 15 on the high-pressure side, which can thereby be very finely coordinated with the two inlet throttles 4, 18. When the valve body 9 changes into its upper valve position, since the pressure in the first relief channel 14 is reduced more slowly, the inlet throttle 18 causes an additional closing force in the direction of the first valve position, so that the control valve 6 closes more quickly.

Claims

Patentansprüche claims
1. Kraftstoffeinspritzvorrichtung (1) für Brennkraftmaschinen, mit einem zwischen einer Hoch- und einer Niederdruckseite (5, 7) angeordneten Steuerventil (6), das die Verbindung eines Steuerraums (2) zur1. Fuel injection device (1) for internal combustion engines, with a control valve (6) arranged between a high and a low pressure side (5, 7), which connects the control chamber (2) to the
Niederdruckseite (7) öffnet oder sperrt, und mit einer zwischen SteuerventilLow pressure side (7) opens or blocks, and with one between the control valve
(6) und Niederdruckseite (7) angeordneten Ablaufdrossel (8), dadurch gekennzeichnet, dass das Steuerventil (6) eine erste Ventilposition, in der die Verbindung des Steuerraums (2) zur Niederdruckseite (7) gesperrt ist, eine zweite(6) and low-pressure side (7) arranged discharge throttle (8), characterized in that the control valve (6) a first valve position in which the connection of the control chamber (2) to the low-pressure side (7) is blocked, a second
Ventilposition, in der der Steuerraum (2) mit der Niederdruckseite (7) über einen ersten Ablaufkanal (14) verbunden ist, und eine dritte Ventilposition, in der der Steuerraum (2) mit der Niederdruckseite (7) über einen eine Ablaufdrossel (15) aufweisenden zweiten Ablaufkanal (16) verbunden ist, aufweist.Valve position in which the control chamber (2) is connected to the low pressure side (7) via a first outlet channel (14) and a third valve position in which the control chamber (2) is connected to the low pressure side (7) via an outlet throttle (15) having the second drain channel (16) is connected.
2. Kraftstoffeinspritzvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Ablaufdrossel (15) des zweiten Ablaufkanals (16) einen höheren Drosselwiderstand als die niederdruckseitige Ablaufdrossel (8) hat.2. Fuel injection device according to claim 1, characterized in that the outlet throttle (15) of the second outlet channel (16) has a higher throttle resistance than the low-pressure side outlet throttle (8).
3. Kraftstoffeinspritzvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in der zweiten Ventilposition der Steuerraum (2) mit der Niederdruckseite (7) auch über den zweiten Entlastungskanal (16) verbunden ist.3. Fuel injection device according to claim 1 or 2, characterized in that in the second valve position the control chamber (2) with the low pressure side (7) is also connected via the second relief channel (16).
4. Kraftstoffeinspritzvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Steuerventil (6) als Doppelsitzventil mit einem in einer Ventilkammer (10) zwischen zwei Ventilsitzen (11 , 12) axial verstellbaren Ventilkörper (9) ausgebildet ist, wobei der eine Ventilsitz (11) mit dem ersten Ablaufkanal (14), der andere Ventilsitz (12) mit der Niederdruckseite (7) und die Ventilkammer (10) mit dem zweiten Ablaufkanal (16) verbunden sind.4. Fuel injection device according to one of the preceding claims, characterized in that the control valve (6) is designed as a double seat valve with an axially adjustable valve body (9) in a valve chamber (10) between two valve seats (11, 12), the one valve seat ( 11) with the first outlet channel (14), the other valve seat (12) with the low pressure side (7) and the valve chamber (10) with the second outlet channel (16).
Kraftstoffeinspritzvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Steuerraum (2) über eine Zulaufdrossel (4), die einen kleineren Drosselwiderstand als die Ablaufdrossel (15) des zweiten Ablaufkanals (16) hat, an die Hochdruckseite (5) angeschlossen ist.Fuel injection device according to one of the preceding claims, characterized in that the control chamber (2) is connected to the high-pressure side (5) via an inlet throttle (4) which has a smaller throttle resistance than the outlet throttle (15) of the second outlet channel (16).
Kraftstoffeinspritzvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Ablaufkanalkanal (14) über eine Zulaufdrossel (18) an die Hochdruckseite (5) angeschlossen ist.Fuel injection device according to one of the preceding claims, characterized in that the first outlet channel (14) is connected to the high pressure side (5) via an inlet throttle (18).
Kraftstoffeinspritzvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Ventilkörper (9) des Steuerventils (6) mittels eines piezoelektrischen Stellantriebs (13) verstellbar ist. Fuel injection device according to one of the preceding claims, characterized in that the valve body (9) of the control valve (6) is adjustable by means of a piezoelectric actuator (13).
EP03740044A 2002-11-23 2003-05-30 Fuel injection device with a 3-way control valve for configuring the injection process Expired - Lifetime EP1567764B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10254749 2002-11-23
DE10254749A DE10254749A1 (en) 2002-11-23 2002-11-23 Fuel injection device with a 3/3-way control valve for injection course shaping
PCT/DE2003/001763 WO2004048769A1 (en) 2002-11-23 2003-05-30 Fuel injection device with a 3-way control valve for configuring the injection process

Publications (2)

Publication Number Publication Date
EP1567764A1 true EP1567764A1 (en) 2005-08-31
EP1567764B1 EP1567764B1 (en) 2011-11-09

Family

ID=32318646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740044A Expired - Lifetime EP1567764B1 (en) 2002-11-23 2003-05-30 Fuel injection device with a 3-way control valve for configuring the injection process

Country Status (5)

Country Link
US (1) US7347385B2 (en)
EP (1) EP1567764B1 (en)
JP (1) JP2006507442A (en)
DE (1) DE10254749A1 (en)
WO (1) WO2004048769A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100432415C (en) * 2004-07-06 2008-11-12 株式会社电装 Common-rail injector
DE102004055263A1 (en) * 2004-11-17 2006-05-18 Robert Bosch Gmbh Fuel injector
DE102005059437A1 (en) * 2005-12-13 2007-06-14 Robert Bosch Gmbh fuel injector
JP4855946B2 (en) * 2006-06-08 2012-01-18 株式会社デンソー Fuel injection valve
DE102006027330A1 (en) * 2006-06-13 2007-12-20 Robert Bosch Gmbh fuel injector
DE102007012706A1 (en) * 2007-03-16 2008-09-18 Robert Bosch Gmbh Valve for fuel injectors
DE102007034318A1 (en) * 2007-07-24 2009-01-29 Robert Bosch Gmbh injector
DE102007042466B3 (en) * 2007-09-06 2009-04-09 Continental Automotive Gmbh Injection system with reduced switching leakage and method of manufacturing an injection system
JP5051279B2 (en) * 2009-12-21 2012-10-17 株式会社デンソー Constant residual pressure valve

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680651A (en) * 1953-06-16 1954-06-08 American Locomotive Co Fuel injector
US3065915A (en) * 1959-01-08 1962-11-27 Samann Julius Container for volatile substances
US3685734A (en) * 1971-02-19 1972-08-22 Minnesota Mining & Mfg Controlled fragrance release device
US4220281A (en) * 1979-01-17 1980-09-02 S. C. Johnson & Son, Inc. Vapor-dispensing device
US4419396A (en) * 1982-08-18 1983-12-06 Terutaka Sugimoto Three-dimensional perfumed seal
US4720409A (en) * 1986-11-20 1988-01-19 Donald Spector Film-laminate type air freshener
US4824707A (en) * 1988-06-27 1989-04-25 Donald Spector Decorative air freshener unit
US4874129A (en) * 1988-06-30 1989-10-17 Dow Corning Corporation Multi-laminate fragrance release device
US5669355A (en) * 1994-07-29 1997-09-23 Caterpillar Inc. Hydraulically-actuated fuel injector with direct control needle valve
US5857620A (en) * 1997-07-14 1999-01-12 The Scott Fetzer Company Liquid dispenser with integral wick/emanator assembly
US6328952B1 (en) * 1999-05-14 2001-12-11 Scientific Mfg. Co., Inc. Air freshener device
JP3557996B2 (en) 1999-06-21 2004-08-25 トヨタ自動車株式会社 Fuel injection device
DE19946828C1 (en) * 1999-09-30 2001-07-12 Bosch Gmbh Robert Valve for controlling liquids
DE10024702A1 (en) * 2000-05-18 2001-11-22 Bosch Gmbh Robert Fuel injector for storage injection system includes bypass channel injecting into outlet path at valve chamber
JP3551898B2 (en) * 2000-06-15 2004-08-11 トヨタ自動車株式会社 Fuel injection valve
DE10031583A1 (en) * 2000-06-29 2002-01-17 Bosch Gmbh Robert High pressure resistant injector with spherical valve element
DE10039215A1 (en) 2000-08-11 2002-02-28 Bosch Gmbh Robert Seat valve arrangement, in particular for a fuel injection system of an internal combustion engine
DE10060836C1 (en) * 2000-12-07 2002-07-25 Bosch Gmbh Robert Pressure-controlled CR injector with stepped opening and closing behavior
US6749130B2 (en) * 2000-12-08 2004-06-15 Caterpillar Inc Check line valve faster venting method
DE10101797A1 (en) * 2001-01-17 2002-07-18 Bosch Gmbh Robert Injection valve for use in an internal combustion engine has a valve control piston, a valve control space with an inlet throttle and an outlet throttle for operating the valve control piston.
DE10111783B4 (en) * 2001-03-12 2005-10-20 Bosch Gmbh Robert injection
JP3527215B2 (en) 2001-04-26 2004-05-17 株式会社日本自動車部品総合研究所 Fuel injection valve
JP3556921B2 (en) 2001-04-27 2004-08-25 株式会社日本自動車部品総合研究所 Fuel injection valve
DE10131640A1 (en) * 2001-06-29 2003-01-16 Bosch Gmbh Robert Fuel injector with injection course shaping through switchable throttle elements
DE10132501A1 (en) 2001-07-05 2002-10-17 Bosch Gmbh Robert Fuel injector device for injection system has control cavity pressure relieved via inflow throttle
DE10141221B4 (en) * 2001-08-23 2009-07-30 Robert Bosch Gmbh Pressure-stroke controlled injector for fuel injection systems
US6749129B2 (en) * 2002-07-31 2004-06-15 Caterpillar Inc Directly controlled fuel injector with sealing against fluid mixing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004048769A1 *

Also Published As

Publication number Publication date
EP1567764B1 (en) 2011-11-09
US7347385B2 (en) 2008-03-25
DE10254749A1 (en) 2004-06-17
WO2004048769A1 (en) 2004-06-10
US20060043210A1 (en) 2006-03-02
JP2006507442A (en) 2006-03-02

Similar Documents

Publication Publication Date Title
EP1252432B1 (en) Directly controlled fuel injection device for a reciprocating internal combustion engine
DE19612738C2 (en) Accumulator injection system for internal combustion engines
DE4332119A1 (en) Fuel injection device for internal combustion engines
EP0686763A1 (en) Fuel injection valve for internal combustion engines
EP0657643B1 (en) Fuel injection device for internal combustion engines
DE60034722T2 (en) Fuel injection arrangement
EP0976924B1 (en) Injector with a servo valve
DE4440182C2 (en) Fuel injection valve for internal combustion engines
EP1552135A1 (en) Fuel injection device for an internal combustion engine
EP0937203B1 (en) Fuel injection valve
DE4115457A1 (en) Injection nozzle for IC engine - incorporates hollow needle controlling first group of injection holes and loaded towards closure position by spring
DE102007042466B3 (en) Injection system with reduced switching leakage and method of manufacturing an injection system
EP1567764B1 (en) Fuel injection device with a 3-way control valve for configuring the injection process
CH686845A5 (en) Control arrangement for an injection valve for internal combustion engines.
DE10210927A1 (en) Fuel injection valve for internal combustion engines
DE102005060552B4 (en) Injection device for fuel engines
WO2004051071A1 (en) Fuel injection device comprising a 3/3-way control valve for forming the injection process
WO2003004857A1 (en) Fuel injector having injection curve shaping
EP1541859A1 (en) Injection valve
DE10254750A1 (en) Fuel injection device with power equalized 3/2 path control valve for combustion engine
DE19725474B4 (en) Flow control valve for a fuel injection system
DE102004011095A1 (en) Fuel injection valve
DE10164395A1 (en) Fuel injection device for IC engine has leakage channel connecting control pressure space for valve piston to discharge bore
WO2006053810A1 (en) Fuel injection device
DE10300385B3 (en) Fuel injection device for internal combustion engine has 3/3-way valve using high pressure e.g. common-rail pressure, for rapid valve closure

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050623

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20080717

RIC1 Information provided on ipc code assigned before grant

Ipc: F02M 47/02 20060101AFI20110607BHEP

Ipc: F02M 63/00 20060101ALI20110607BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 50314062

Country of ref document: DE

Effective date: 20111229

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20120810

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50314062

Country of ref document: DE

Effective date: 20120810

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120530

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20160726

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20170522

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170524

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50314062

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180530

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180531