WO2002055868A1 - Common rail unit - Google Patents

Common rail unit Download PDF

Info

Publication number
WO2002055868A1
WO2002055868A1 PCT/DE2001/004799 DE0104799W WO02055868A1 WO 2002055868 A1 WO2002055868 A1 WO 2002055868A1 DE 0104799 W DE0104799 W DE 0104799W WO 02055868 A1 WO02055868 A1 WO 02055868A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
common rail
rail unit
fuel
rail pressure
Prior art date
Application number
PCT/DE2001/004799
Other languages
German (de)
French (fr)
Inventor
Achim Brenk
Wolfgang Klenk
Roland Bleher
Uwe Gordon
Manfred Mack
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 WO2002055868A1 publication Critical patent/WO2002055868A1/en

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
    • F02M63/0003—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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention relates to a common rail unit for a
  • the fuel injection device is pressure-controlled.
  • a pressure-controlled fuel injection device is understood to mean that the fuel pressure prevailing in the nozzle space of an injection nozzle moves a nozzle needle against the action of a closing force (spring), so that the injection opening is released for injection of the fuel from the nozzle space into the cylinder ,
  • injection pressure The pressure at which fuel emerges from the nozzle chamber into a cylinder of an internal combustion engine
  • system pressure is understood to mean the pressure at which fuel is available or is stored within the fuel injection device.
  • Fuel metering means to provide a defined amount of fuel for injection.
  • Leakage is an amount of fuel that is generated during operation of the fuel injector (e.g. a guide leak), is not used for injection and is returned to the fuel tank.
  • the pressure level of this leakage can have a standing pressure, the fuel then being expanded to the pressure level of the fuel tank.
  • the injection pressure can be adapted to the load and speed.
  • a pre-injection is often carried out here to reduce noise.
  • pressure-controlled injection is known to be cheap.
  • Pressure-controlled fuel injection devices currently have metering valves and control modules which are arranged in the region of the injection nozzles for functional reasons.
  • a common rail unit for a fuel injection device according to claim 1 is proposed. It is possible to integrate the metering valve into the rail in the form of a 3/2-way metering valve without impairing the hydrodynamic properties.
  • the advantage of the common rail unit is that the complex components, such as the 3/2-way valve, the rail pressure sensor and the rail pressure regulator as well as the associated adapters, are always kept the same, regardless of the engine type. This increases the manufacturing efficiency compared to today's systems, in which complex forged parts have to be manufactured for each engine type.
  • connection parts of the adapter sleeve and the connecting tube can thus be produced from material which is cheaper in relation to the complex components, since these contain no intersections of holes. This makes machining much easier compared to known common rail systems. If rotationally symmetrical connecting parts are used, there is no need to use special machines during machining.
  • the invention has the advantage that the complex components, metering valve (solenoid valve), one or more throttles, constant pressure valve or pressure booster are integrated in a common rail unit, which can form the basis for a wide variety of engine types.
  • Fig. 1 shows a first common rail unit for a fuel injection device
  • Fig. 2 shows a second common rail unit for a fuel injection device
  • Fig. 3 shows a third common rail unit for a fuel injection device. Description of the embodiments
  • a quantity-controlled fuel pump 2 shown only in FIG. 1 b delivers fuel from a storage tank via a delivery line to the common rail unit 1.
  • the common rail unit 1 is composed of the components 3/2-way metering valve 3, rail pressure sensor adapter 4, rail pressure sensor 5, rail pressure regulator adapter 6, rail pressure regulator 7, clamping sleeve 8 and connecting pipe 9.
  • a different number of metering valves 3 can be provided. 1 shows only two metering valves 3 connected to one another via the connecting pipe 9.
  • a pressure storage chamber 10 for the fuel under high pressure is formed in the connecting pipe 3.
  • a system pressure is generated and stored in the pressure storage chamber 10 at a pressure of 300 to approximately 1800 bar.
  • fuel metering in the direction of the arrow 11 via pressure lines (not shown) and the injection for each cylinder are pressure-controlled.
  • the injection then takes place in a known manner by means of a displaceable nozzle needle.
  • the discharge quantity takes place via threaded bores in the direction of arrow 19 in a return line, not shown, into the fuel tank.
  • the high-pressure connection points between the components are produced by a customary conical tension connection via the clamping sleeves 8 and 12.
  • the connecting tube 9 is made from a simple tube with a cone turned on.
  • the clamping sleeve 8 is made of a commercially available pipe or round material.
  • the connecting tube 9 and the clamping sleeve 8 represent simply constructed rotationally symmetrical components and can be cut to length with a corresponding cylinder spacing, depending on the engine type.
  • the radial position the components 3 to 9 protruding from the connecting pipe 9 are variable, ie they can also be easily adapted to motor installation situations by means of an assembly gauge or a corresponding device. With conical screw connections (left / right-hand thread) using sleeves, the radial position can always be adapted to the motor installation situation.
  • FIGS. 2 and 3 are identical to the common rail unit 1 according to FIG. 1. Different connections of the components are realized.
  • a connecting tube 13 in a common rail unit 14 has a smaller radial extension at its ends, so that an adapter sleeve 15 is screwed onto the ends.
  • FIG. 3 FIG. 2a longitudinal section, FIG. 2b top view
  • the cone for bracing two components 16 and 17 of a common rail unit 18 can be designed differently.

Abstract

In a common rail unit (1) for a fuel injection device, a metering valve (3), a rail pressure sensor (5) and a rail pressure regulator (7) are detachably connected to a shared connecting tube (9) by a rail pressure sensor adapter (4), a rail pressure regulator adapter (6) and by one or more clamping sleeves (8).

Description

COMMON-RAIL EINHEIT COMMON-RAIL UNIT
Stand der TechnikState of the art
Die Erfindung betrifft eine Common-Rail-Einheit für eineThe invention relates to a common rail unit for a
Kraftstoff ein spritzeinrichtung.Fuel injector.
Zum besseren Verständnis der Beschreibung und der Patentansprüche werden nachfolgend einige Begriffe erläutert: Die Kraftstoffeinspritzeinrichtung ge mäß der Erfindung ist druckgesteuert ausgebildet. Im Rahmen der Erfindung wird unter einer druckgesteuerten Kraftstoffeinspritzeinrichtung verstanden, dass durch den im Düsenraum einer Einspritzdüse herrschenden Kraftstoffdruck eine Düsennadel gegen die Wirkung einer Schließkraft (Feder) bewegt wird, so dass die Einspritzöffnung für eine Einspritzung des Kraftstoffs aus dem Düsenraum in den Zylinder freigegeben wird. Der Druck, mit dem Kraftstoff aus dem Düsenraum in einen Zylinder einer Brennkraftmaschine austritt, wird als Einspritzdruck bezeichnet, während unter einem Systemdruck der Druck verstanden wird, unter dem Kraftstoff innerhalb der Kraftstoffeinspritzeinrichtung zur Verfügung steht bzw. bevorratet ist. Kraftstoffzumessung bedeutet, eine definierte Kraftstoffmenge zur Einspritzung bereitzusteflen. Unter Leckage ist eine Menge an Kraftstoff zu verstehen, die beim Betrieb der Kraftstoffeinspritzeinrichtung entsteht (z.B. eine Führungsleckage), nicht zur Einspritzung verwendet und zum Kraftstofftank zurückgefördert wird. Das Druckniveau dieser Leckage kann einen Standdruck aufweisen, wobei der Kraftstoff anschließend auf das Druckniveau des Kraftstofftanks entspannt wird.For a better understanding of the description and the claims, some terms are explained below: The fuel injection device according to the invention is pressure-controlled. In the context of the invention, a pressure-controlled fuel injection device is understood to mean that the fuel pressure prevailing in the nozzle space of an injection nozzle moves a nozzle needle against the action of a closing force (spring), so that the injection opening is released for injection of the fuel from the nozzle space into the cylinder , The pressure at which fuel emerges from the nozzle chamber into a cylinder of an internal combustion engine is referred to as injection pressure, while a system pressure is understood to mean the pressure at which fuel is available or is stored within the fuel injection device. Fuel metering means to provide a defined amount of fuel for injection. Leakage is an amount of fuel that is generated during operation of the fuel injector (e.g. a guide leak), is not used for injection and is returned to the fuel tank. The pressure level of this leakage can have a standing pressure, the fuel then being expanded to the pressure level of the fuel tank.
Bei Common Rail Systemen kann der Einsprit∑druck an Last und Drehzahl angepaßt werden. Zur Geräuschminderung wird hier oft eine Voreinspritzung durchgeführt, Zur Reduzierung von Emissionen ist eine druckgesteuerte Einspritzung bekanntermaßen günstig. Derzeit weisen druckgesteuerte Kraftstoffeinspritzeinrichtungen Zumessventiie und Steuermodule auf, welche aus Funktionsgründen im Bereich der Einspritzdüsen angeordnet sind.With common rail systems, the injection pressure can be adapted to the load and speed. A pre-injection is often carried out here to reduce noise. To reduce emissions, pressure-controlled injection is known to be cheap. Pressure-controlled fuel injection devices currently have metering valves and control modules which are arranged in the region of the injection nozzles for functional reasons.
Vorteile der ErfindungAdvantages of the invention
Zur Reduzierung des Fertigungsaufwands wird eine Common-Rail-Einheit für eine Kraftstoffeinspritzeinrichtung gemäß Patentanspruch 1 vorgeschlagen. Ohne Beeinträchtigung der hydrodynamischen Eigenschaften ist es möglich, das Zumessventil in Form eines 3/2-WegeZumessventils in das Rail zu integrieren.To reduce the manufacturing effort, a common rail unit for a fuel injection device according to claim 1 is proposed. It is possible to integrate the metering valve into the rail in the form of a 3/2-way metering valve without impairing the hydrodynamic properties.
Bei entsprechender Abstimmung der Länge der Druckleitung vom Zumessventil zur Einspritzdüse wird eine Druckerhöhung im Düsenraum gegenüber dem Raildruck um 20 bis 30 % erreicht. Diese Druckerhöhung wirkt sich positiv auf die Strahlaufbereitung sowie auf das Abgasverhalten des Motors aus.With an appropriate adjustment of the length of the pressure line from the metering valve to the injection nozzle, a pressure increase in the nozzle area compared to the rail pressure of 20 to 30% is achieved. This pressure increase has a positive effect on the jet treatment and the exhaust gas behavior of the engine.
Der Vorteil der Common-Rail-Einheit besteht darin, dass die komplexen Bauteile, wie das 3/2-Wege-Ventil, der Raildrucksensor und der Raildruckregler sowie die zugehörigen Adapter, immer gleich gehalten werden, egal bei welchem Motortyp. Das steigert die Fertigungseffizienz gegenüber den heutigen Systemen, bei denen für jeden Motortyp aufwendige Schmiedeteile hergestellt werden müssen.The advantage of the common rail unit is that the complex components, such as the 3/2-way valve, the rail pressure sensor and the rail pressure regulator as well as the associated adapters, are always kept the same, regardless of the engine type. This increases the manufacturing efficiency compared to today's systems, in which complex forged parts have to be manufactured for each engine type.
Desweiteren fallen mehrere Hochdruckbohrungsverschneidungen weg, da diese im Zumessventilbereich liegen, in dem sie sowieso vorhanden sein müssen. Die Verbindungsteile Spannhülse und Verbindungsrohr können dadurch aus im Verhältnis zu den komplexen Bauteilen billigerem Material hergestellt werden, da diese keine Bohrungsverschneidungen enthalten. Dadurch wird die Zerspanarbeit gegenüber bekannten Common-Rail-Systemen wesentlich erleichtert. Wenn rotationssymmetrische Verbindungsteile verwendet werden, entfällt bei der Bearbeitung der Einsatz von Sondermaschinen.Furthermore, several high-pressure bore intersections are no longer necessary, since these are located in the metering valve area, in which they must be present anyway. The connecting parts of the adapter sleeve and the connecting tube can thus be produced from material which is cheaper in relation to the complex components, since these contain no intersections of holes. This makes machining much easier compared to known common rail systems. If rotationally symmetrical connecting parts are used, there is no need to use special machines during machining.
Durch konische Schraubverbindungen (Links-/Rechtsgewinde) mittels einer Hülse kann die radiale Lage von Bauteilen relativ zum gemeinsamen Verbindungsrohr immer an die Motoreinbausituation angepasst werden. Bei dieser Verbindung von unter Hochdruck stehenden Bauteilen entstehen die kritischen Spannungen zum größten Teil im Verschraubbereich. Damit werden keine Spannungen auf Bohrungsverschneidungen oder Ventilführungen eingeleitet.Through conical screw connections (left / right-hand thread) using a sleeve, the radial position of components relative to the common connecting pipe can always be adapted to the motor installation situation. With this connection of components under high pressure, most of the critical stresses arise in the screwing area. This means that no stresses are introduced on intersections of holes or valve guides.
Zusammenfassend gesagt, besitzt die Erfindung den Vorteil, dass die komplexen Bauteile, Zumessventil (Magnetventil), eine oder mehrere Drosseln, Gleichdruckventil oder Druckverstärker, in eine Common-Rail-Einheit integriert werden, welche eine Basis für unterschiedlichste Motorentypen bilden kann.In summary, the invention has the advantage that the complex components, metering valve (solenoid valve), one or more throttles, constant pressure valve or pressure booster are integrated in a common rail unit, which can form the basis for a wide variety of engine types.
Zeichnungdrawing
Drei Ausführungsbeispiele der erfindungsgemäßen Common-Rail-Einheit für eine Kraftstoffeinspritzeinrichtung sind in der schematischen Zeichnung dargestellt und werden in der nachfolgenden Beschreibung erläutert. Es zeigt:Three exemplary embodiments of the common rail unit according to the invention for a fuel injection device are shown in the schematic drawing and are explained in the following description. It shows:
Fig. 1 eine erste Common-Rail-Einheit für eine KraftstoffeinspritzeinrichtungFig. 1 shows a first common rail unit for a fuel injection device
Fig. 2 eine zweite Common-Rail-Einheit für eine KraftstoffeinspritzeinrichtungFig. 2 shows a second common rail unit for a fuel injection device
Fig. 3 eine dritte Common-Rail-Einheit für eine Kraftstoffeinspritzeinrichtung. Beschreibung der AusführungsbeispieleFig. 3 shows a third common rail unit for a fuel injection device. Description of the embodiments
Bei der in Fig. 1 dargestellten Common-Rail-Einheit 1 (Fig. 1 a im Längsschnitt, Fig. 1 b in der Draufsicht) für eine druckgesteuerte Kraftstoffeinspritzeinrichtung fördert eine nur in der Fig. 1 b gezeigte mengengeregelte Kraftstoffpumpe 2 Kraftstoff aus einem Vorratstank über eine Förderleitung zur Common-Rail-Einheit 1 . Die Common- Rail-Einheit 1 ist aus den Bauteilen 3/2-Wegezumessventil 3, Raildrucksensoradapter 4, Raildrucksensor 5, Raildruckregleradapter 6, Raildruckregler 7, Spannhülse 8 und Verbindungsrohr 9 aufgebaut. Je nach Anzahl der Zylinder der Brennkraftmaschine kann eine unterschiedliche Anzahl von Zumessventilen 3 vorgesehen sein. Die Fig. 1 zeigt lediglich zwei über das Verbindungsrohr 9 mit einander verbundene Zumessventile 3. In dem Verbindungsrohr 3 ist ein Druckspeicherraum 10 für den unter Hochdruck stehenden Kraftstoff ausgebildet. Mit Hilfe der Kraftstoffpumpe wird ein Systemdruck erzeugt und im Druckspeicherraum 10 mit einem Druck von 300 bis ca. 1800 bar gespeichert. Mit Hilfe der Zumessventiie 3 werden eine Kraftstoffzumessung in Pfeilrichtung 1 1 über nicht gezeigte Druckleitungen und die Einspritzung für jeden Zylinder druckgesteuert realisiert. Die Einspritzung erfolgt anschließend in bekannter Weise mittels einer verschiebbaren Düsennadei. Die Absteuermenge erfolgt über Gewindebohrungen in Pfeilrichtung 1 9 in einen nicht näher dargestellten Rücklauf in den Kraftstofftank.In the common rail unit 1 shown in FIG. 1 (FIG. 1 a in longitudinal section, FIG. 1 b in plan view) for a pressure-controlled fuel injection device, a quantity-controlled fuel pump 2 shown only in FIG. 1 b delivers fuel from a storage tank via a delivery line to the common rail unit 1. The common rail unit 1 is composed of the components 3/2-way metering valve 3, rail pressure sensor adapter 4, rail pressure sensor 5, rail pressure regulator adapter 6, rail pressure regulator 7, clamping sleeve 8 and connecting pipe 9. Depending on the number of cylinders of the internal combustion engine, a different number of metering valves 3 can be provided. 1 shows only two metering valves 3 connected to one another via the connecting pipe 9. A pressure storage chamber 10 for the fuel under high pressure is formed in the connecting pipe 3. With the help of the fuel pump, a system pressure is generated and stored in the pressure storage chamber 10 at a pressure of 300 to approximately 1800 bar. With the aid of the metering valve 3, fuel metering in the direction of the arrow 11 via pressure lines (not shown) and the injection for each cylinder are pressure-controlled. The injection then takes place in a known manner by means of a displaceable nozzle needle. The discharge quantity takes place via threaded bores in the direction of arrow 19 in a return line, not shown, into the fuel tank.
Die Hochdruckverbindungsstellen zwischen den Bauteilen sind durch eine übliche Konusspannverbindung über die Spannhülsen 8 und 12 hergestellt. Das Verbindungsrohr 9 ist aus einem einfachen Rohr mit angedrehtem Konus hergestellt. Ebenso ist auch die Spannhülse 8 aus einem handelsüblichen Rohr oder Rundmaterial hergestellt. Das Verbindungsrohr 9 und die Spannhülse 8 stellen einfach aufgebaute rotationssymmetrische Bauteile dar und lassen sich je nach Motortyp mit einem entsprechendem Zylinderabstand ablängen. Die radiale Position der von dem Verbindungsrohr 9 abstehenden Bauteile 3 bis 9 ist variabel, d. h. sie kann ebenfalls auf Motoreinbausituationen einfach mittels einer Montagelehre oder einer entsprechenden Vorrichtung angepasst werden. Durch konische Schraubverbindungen (Links-/Rechtsgewinde) mittels Hülsen kann die radiale Lage immer auf die Motoreinbausituation angepasst werden.The high-pressure connection points between the components are produced by a customary conical tension connection via the clamping sleeves 8 and 12. The connecting tube 9 is made from a simple tube with a cone turned on. Likewise, the clamping sleeve 8 is made of a commercially available pipe or round material. The connecting tube 9 and the clamping sleeve 8 represent simply constructed rotationally symmetrical components and can be cut to length with a corresponding cylinder spacing, depending on the engine type. The radial position the components 3 to 9 protruding from the connecting pipe 9 are variable, ie they can also be easily adapted to motor installation situations by means of an assembly gauge or a corresponding device. With conical screw connections (left / right-hand thread) using sleeves, the radial position can always be adapted to the motor installation situation.
Die Common-Rail-Einheiten gemäß Fign. 2 und 3 sind vom Prinzip her identisch zur Common-Rail-Einheit 1 gemäß Fig. 1 . Es sind unterschiedliche Verbindungen der Bauteile realisiert. Gemäß Fig. 2 (Fig. 2a Längsschnitt, Fig. 2b Draufsicht) weist ein Verbindungsrohr 13 bei einer Common-Rail-Einheit 14 an seinen Enden eine geringere radiale Erstreckung auf, so dass an den Enden jeweils eine Spannhülse 15 aufgeschraubt ist. Aus der Fig. 3 (Fig. 2a Längsschnitt, Fig. 2b Draufsicht) ist ersichtlich, dass der Konus zum Verspannen zweier Bauteile 16 und 17 einer Common-Rail-Einheit 18 unterschiedlich gestaltet sein kann. The common rail units according to FIGS. In principle, 2 and 3 are identical to the common rail unit 1 according to FIG. 1. Different connections of the components are realized. According to FIG. 2 (FIG. 2a longitudinal section, FIG. 2b top view), a connecting tube 13 in a common rail unit 14 has a smaller radial extension at its ends, so that an adapter sleeve 15 is screwed onto the ends. From FIG. 3 (FIG. 2a longitudinal section, FIG. 2b top view) it can be seen that the cone for bracing two components 16 and 17 of a common rail unit 18 can be designed differently.

Claims

PATENTANSPRÜCHE
1. Common-Rail-Einheit (1; 14; 18) für eine Kraftstoffeinspritzeinrichtung, bestehend aus einer lösbaren Verbindung eines Zumessventils (3; 16), eines Raildrucksensors (5) und eines Raildruckreglers (7) mit Hilfe eines1. Common rail unit (1; 14; 18) for a fuel injection device, consisting of a detachable connection of a metering valve (3; 16), a rail pressure sensor (5) and a rail pressure regulator (7) with the aid of a
Raildrucksensoradapters (6), eines Raildruckregleradapters (6) und einer oder mehrerer Spannhülsen (8; 15) an einem gemeinsamen Verbindungsrohr (9; 17).Rail pressure sensor adapter (6), a rail pressure regulator adapter (6) and one or more clamping sleeves (8; 15) on a common connecting tube (9; 17).
2. Common-Rail-Einheit nach Anspruch 1, dadurch gekennzeichnet, dass das Zumessventil (3; 16) ein 3/2-Wegeventil ist.2. Common rail unit according to claim 1, characterized in that the metering valve (3; 16) is a 3/2-way valve.
3. Common-Rail-Einheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Verbindungsbereiche der zu verbindenden Bauteile (3, 5, 6, 7, 9; 16, 17; konisch gestaltet sind. 3. Common rail unit according to claim 1 or 2, characterized in that the connection areas of the components to be connected (3, 5, 6, 7, 9; 16, 17; are conical.
PCT/DE2001/004799 2001-01-12 2001-12-19 Common rail unit WO2002055868A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001101476 DE10101476A1 (en) 2001-01-12 2001-01-12 Common rail unit
DE10101476.7 2001-01-12

Publications (1)

Publication Number Publication Date
WO2002055868A1 true WO2002055868A1 (en) 2002-07-18

Family

ID=7670546

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/004799 WO2002055868A1 (en) 2001-01-12 2001-12-19 Common rail unit

Country Status (2)

Country Link
DE (1) DE10101476A1 (en)
WO (1) WO2002055868A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921304A3 (en) * 2006-11-10 2009-08-19 Mitsubishi Heavy Industries, Ltd. Accumulator fuel injection apparatus for engines
GB2463256A (en) * 2008-09-05 2010-03-10 Gm Global Tech Operations Inc Apparatus for connecting a high pressure pump to the fuel injectors of an i.c. engine
DE102011056118A1 (en) * 2011-12-07 2013-06-13 L'orange Gmbh Modular common rail system for internal combustion engine, comprises nozzle unit opening against spring force in pressurized manner, where control units of fuel injecting units have adjusting and control elements separated from nozzle units
WO2013117445A1 (en) * 2012-02-08 2013-08-15 Robert Bosch Gmbh A fuel supply device in a vehicle
US20220412299A1 (en) * 2021-06-29 2022-12-29 Volvo Truck Corporation Fuel conduit connection assembly for a vehicle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309311B4 (en) 2003-03-04 2005-01-05 Siemens Ag Fuel high pressure storage
ATE494477T1 (en) * 2005-10-25 2011-01-15 Crt Common Rail Technologies Ag INJECTOR FOR A FUEL INJECTION SYSTEM AND FUEL INJECTION SYSTEM WITH SUCH AN INJECTOR
DE102015214333A1 (en) * 2015-07-29 2017-02-02 Robert Bosch Gmbh Fuel injection system
DE102018118120A1 (en) * 2018-07-26 2020-01-30 Liebherr-Components Deggendorf Gmbh Connector for fuel injector of an internal combustion engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507191A1 (en) * 1991-04-04 1992-10-07 Toyota Jidosha Kabushiki Kaisha A fuel injection device of an engine
EP0508362A2 (en) * 1991-04-08 1992-10-14 Toyota Jidosha Kabushiki Kaisha Coupling for high pressure fluid
DE4311391A1 (en) * 1992-04-09 1993-10-14 Usui Kokusai Sangyo Kk High pressure fuel injection line
DE4313852A1 (en) * 1993-04-28 1994-11-03 Bosch Gmbh Robert Fuel injection device for internal combustion engines
DE19618791C1 (en) * 1996-05-10 1997-12-11 Mtu Friedrichshafen Gmbh Fuel injection system for diesel engine
DE19747736C1 (en) * 1997-10-29 1999-04-08 Siemens Ag Pressure reservoir for IC engine common-rail fuel injection supply system
EP1039123A2 (en) * 1999-03-24 2000-09-27 Siemens Automotive Corporation Fuel recirculation for direct injection fuel system using a high pressure variable venturi pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507191A1 (en) * 1991-04-04 1992-10-07 Toyota Jidosha Kabushiki Kaisha A fuel injection device of an engine
EP0508362A2 (en) * 1991-04-08 1992-10-14 Toyota Jidosha Kabushiki Kaisha Coupling for high pressure fluid
DE4311391A1 (en) * 1992-04-09 1993-10-14 Usui Kokusai Sangyo Kk High pressure fuel injection line
DE4313852A1 (en) * 1993-04-28 1994-11-03 Bosch Gmbh Robert Fuel injection device for internal combustion engines
DE19618791C1 (en) * 1996-05-10 1997-12-11 Mtu Friedrichshafen Gmbh Fuel injection system for diesel engine
DE19747736C1 (en) * 1997-10-29 1999-04-08 Siemens Ag Pressure reservoir for IC engine common-rail fuel injection supply system
EP1039123A2 (en) * 1999-03-24 2000-09-27 Siemens Automotive Corporation Fuel recirculation for direct injection fuel system using a high pressure variable venturi pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921304A3 (en) * 2006-11-10 2009-08-19 Mitsubishi Heavy Industries, Ltd. Accumulator fuel injection apparatus for engines
GB2463256A (en) * 2008-09-05 2010-03-10 Gm Global Tech Operations Inc Apparatus for connecting a high pressure pump to the fuel injectors of an i.c. engine
GB2463256B (en) * 2008-09-05 2012-10-31 Gm Global Tech Operations Inc Fuel injection apparatus for internal combustion engines
DE102011056118A1 (en) * 2011-12-07 2013-06-13 L'orange Gmbh Modular common rail system for internal combustion engine, comprises nozzle unit opening against spring force in pressurized manner, where control units of fuel injecting units have adjusting and control elements separated from nozzle units
WO2013117445A1 (en) * 2012-02-08 2013-08-15 Robert Bosch Gmbh A fuel supply device in a vehicle
CN104169563A (en) * 2012-02-08 2014-11-26 罗伯特·博世有限公司 Fuel supply device in vehicle
US20220412299A1 (en) * 2021-06-29 2022-12-29 Volvo Truck Corporation Fuel conduit connection assembly for a vehicle

Also Published As

Publication number Publication date
DE10101476A1 (en) 2002-07-25

Similar Documents

Publication Publication Date Title
EP1485609B1 (en) Device for injecting fuel to stationary internal combustion engines
EP0968367B1 (en) Fuel-injection system for an internal combustion engine
DE10065103C1 (en) Pressure-controlled fuel injection device has pressure cavity connected by line containing valve directly to pressure storage cavity
EP2108080A1 (en) Injector for injecting fuel into combustion chambers of internal combustion engines
DE10123775A1 (en) Fuel injection device for internal combustion engines, in particular common rail injector, and fuel system and internal combustion engine
DE19706591A1 (en) Pressure valve
WO2002055868A1 (en) Common rail unit
DE19938169A1 (en) Fuel injector
WO2001033070A1 (en) Fuel injection system for internal combustion engines with a constant overflow oil pressure in the injector
EP1354133B1 (en) Fuel-injection device
DE10057683B4 (en) Fuel injection system
EP1751423B1 (en) Fuel-injection system
DE102006034114A1 (en) Return line connecting device
DE3843840C2 (en)
EP2807367B1 (en) Device for injecting fuel into the combustion chamber of an internal combustion engine
DE102005020833A1 (en) Modular jet for automotive fuel injection system has modular components held in line by threaded nuts
DE102006050033A1 (en) Injector, in particular common rail injector
DE2930499A1 (en) Fuel injection pump for diesel engine - has annular groove round discharge valve seat to reduce cavitation in fuel
DE10054526A1 (en) injection
EP1589218A1 (en) Fluctuation damper for a hydraulic system
DE19919665A1 (en) Fuel injector
DE10164395A1 (en) Fuel injection device for IC engine has leakage channel connecting control pressure space for valve piston to discharge bore
WO2006063909A1 (en) Device for determining the amount of fuel return of an injector of a fuel injection device of an internal combustion engine
EP1067284A1 (en) Fuel injection valve
DE10160490A1 (en) Fuel injection device, fuel system and IC engine, has fuel flow rate to injector nozzle modified by buffer chamber in nozzle valve

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP