EP1476654A1 - Fuel injection device for a combustion engine - Google Patents

Fuel injection device for a combustion engine

Info

Publication number
EP1476654A1
EP1476654A1 EP02804534A EP02804534A EP1476654A1 EP 1476654 A1 EP1476654 A1 EP 1476654A1 EP 02804534 A EP02804534 A EP 02804534A EP 02804534 A EP02804534 A EP 02804534A EP 1476654 A1 EP1476654 A1 EP 1476654A1
Authority
EP
European Patent Office
Prior art keywords
fuel
pressure
pump
return
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
EP02804534A
Other languages
German (de)
French (fr)
Other versions
EP1476654B1 (en
Inventor
Gerhard Geyer
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 EP1476654A1 publication Critical patent/EP1476654A1/en
Application granted granted Critical
Publication of EP1476654B1 publication Critical patent/EP1476654B1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The fuel injection device has a fuel-supply pump that delivers fuel from a fuel tank to a high-pressure pump which delivers fuel to a reservoir connected to at least one injector that injects fuel into the internal combustion engine. A fuel filter is disposed between the fuel-supply pump and the high-pressure pump, wherein a return for fuel from the at least one injector and/or from the reservoir to a low-pressure region is provided. The return is provided with an additional fuel filter and downstream of the fuel filter, the return feeds into the connection between the fuel-supply pump and the high-pressure pump.

Description

Kraftstoffeinspritzeinrichtunσ für eine Brennkraftmaschine Fuel injection device for an internal combustion engine
Stand der TechnikState of the art
.0 Die Erfindung geht aus von einer.0 The invention is based on a
Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine nach der Gattung des Anspruchs 1.Fuel injection device for an internal combustion engine according to the preamble of claim 1.
Eine solche Kraftstoffeinspritzeinrichtung ist aus derSuch a fuel injection device is from the
.5 Literatur, beispielsweise Dieselmotor-Management, Verlag Vieweg, 2. Auflage 1998, Seite 262, bekannt. Diese Kraftstoffeinspritzeinrichtung weist eine Förderpumpe auf, durch die Kraftstoff aus einem Kraftstoffvorratsbehälter zu einer Hochdruckpumpe gefördert wird. Durch die.5 Literature, for example Diesel engine management, Vieweg publishing house, 2nd edition 1998, page 262 known. This fuel injection device has a feed pump, through which fuel is fed from a fuel reservoir to a high-pressure pump. Through the
!0 Hochdruckpumpe wird Kraftstoff in einen Speicher gefördert, mit dem Injektoren verbunden sind, durch die Kraftstoff an der Brennkraftmaschine eingespritzt wird. Zwischen der Förderpumpe und der Hochdruckpumpe ist ein Kraftstoffilter angeordnet. Es ist ein Rücklauf für nicht eingespritzten! 0 High-pressure pump, fuel is pumped into a memory, to which injectors are connected, through which fuel is injected into the internal combustion engine. A fuel filter is arranged between the feed pump and the high pressure pump. It is a return for non-injected
!5 Kraftstoff von den Injektoren in einen Niederdruckbereich vorgesehen, als der der Kraftstoffvorratsbehälter dient. Nachteilig hierbei ist, daß durch die Förderpumpe ständig eine große Kraftstoffmenge angesaugt werden muss, die teilweise wieder in den Kraftstoffvorratsbehälter! 5 Provide fuel from the injectors to a low pressure area as the fuel reservoir. The disadvantage here is that a large amount of fuel has to be constantly sucked in by the feed pump, some of which has to be returned to the fuel tank
10 zurückgeleitet wird. Die Förderpumpe und das Kraftstoffilter müssen daher entsprechend groß dimensioniert werden und es ist sind kurze Wartungsintervalle zum Wechsel des Kraftstoffilters erforderlich, um dessen zuverlässige Funktion sicherzustellen.10 is returned. The feed pump and the fuel filter must therefore be dimensioned accordingly large and short maintenance intervals are required to change the fuel filter in order to ensure its reliable function.
1515
Vorteile der Erfindung Die erfindungsgemäße Kraftstoffeinspritzeinrichtung mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, daß durch die Rückführung des nicht eingespritzten Kraftstoffs in die Verbindung zwischen die Förderpumpe und die Hochdruckpumpe durch die Förderpumpe eine geringereAdvantages of the invention The fuel injection device according to the invention with the features according to claim 1 has the advantage that the return of the non-injected fuel in the connection between the feed pump and the high pressure pump by the feed pump is less
Kraftstoffmenge gefördert zu werden braucht, so daß diese entsprechend kleiner dimensioniert werden kann. Auch das Kraftstoffilter kann entsprechend kleiner dimensioniert werden und die Wartungsintervalle für dessen Wechsel können verlängert werden. Durch das weitere Kraftstoffilter imFuel quantity needs to be promoted so that it can be dimensioned correspondingly smaller. The fuel filter can also be made smaller and the maintenance intervals for changing it can be extended. Through the further fuel filter in the
Rücklauf ist sichergestellt, daß auch der zurückgeleitete und der Hochdruckpumpe wieder zugeführte Kraftstoff ausreichend gereinigt ist. Das weitere Kraftstoffilter kann dabei hinsichtlich der Dimensionierung und der erforderlichen Wartungsintervalle für dessen Wechsel unabhängig vom anderen Kraftstoffilter entsprechend der geringeren An orderungen ausgelegt werden, da der zurückfließende Kraftstoff keine so starke Verunreinigung wie der aus dem Kraftstoffvorratsbehälter angesaugte Kraftstoff aufweist. Das Volumen des weiterenReturn flow ensures that the fuel that is returned and fed back to the high-pressure pump is sufficiently cleaned. The further fuel filter can be designed with regard to the dimensioning and the required maintenance intervals for changing it independently of the other fuel filter in accordance with the lower requirements, since the fuel flowing back does not have as much contamination as the fuel drawn from the fuel tank. The volume of the further
Kraftstoffilters kann dabei außerdem eine Dämpfung von Druckschwingungen und/oder Druckstößen im Rücklauf bewirken.Fuel filters can also dampen pressure fluctuations and / or pressure surges in the return.
In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Kraftstoffeinspritzeinrichtung angegeben. Durch die Ausbildung gemäß Anspruch 2 ist sichergestellt, daß durch die Förderpumpe kein Kraftstoff in den Rücklauf gefördert wird. Durch den Öffnungsdruck des Rückschlagventils kann außerdem das Druckniveau im Rücklauf eingestellt werden.Advantageous refinements and developments of the fuel injection device according to the invention are specified in the dependent claims. The design according to claim 2 ensures that no fuel is conveyed into the return line by the feed pump. The pressure level in the return line can also be set by the opening pressure of the check valve.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eineAn embodiment of the invention is shown in the drawing and in the following description explained. 1 shows a
Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs in schematischer Darstellung und Figur 2 die Kraftstoffeinspritzeinrichtung ausschnittsweise gemäß 5 einer modifizierten Ausführung.Fuel injection device for an internal combustion engine of a motor vehicle in a schematic representation, and FIG. 2 shows a detail of the fuel injection device according to FIG. 5 of a modified embodiment.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In Figur 1 ist eine Kraftstoffeinspritzeinrichtung für eineIn Figure 1 is a fuel injection device for a
L0 Brennkraftmaschine beispielsweise eines Kraftfahrzeugs dargestellt. Die Brennkraftmaschine ist vorzugsweise eine selbstzündende Brennkraftmaschine und weist einen oder mehrere Zylinder auf. Die Kraftstoffeinspritzeinrichtung weist eine Förderpumpe 10 auf, die innerhalb oder außerhalbL0 internal combustion engine shown, for example, a motor vehicle. The internal combustion engine is preferably a self-igniting internal combustion engine and has one or more cylinders. The fuel injection device has a feed pump 10, which is inside or outside
L5 eines Kraftstoffvorratsbehälters 12 des Kraftfahrzeugs angeordnet sein kann. Die Förderpumpe 10 kann einen elektrischen Antriebsmotor aufweisen und saugt beispielsweise über ein Vorfilter 14 Kraftstoff aus dem Kraftstoffvorratsbehälter 12 an. Die Förderpumpe 10 kannL5 of a fuel tank 12 of the motor vehicle can be arranged. The feed pump 10 can have an electric drive motor and draws fuel from the fuel reservoir 12, for example, via a prefilter 14. The feed pump 10 can
10 auch beispielsweise mechanisch durch die Brennkraftmaschine oder eine nachfolgend erläuterte Hochdruckpumpe 18 angetrieben werden. Vom Auslass der Förderpumpe 10 führt eine Verbindung 16 zu der Hochdruckpumpe 18. Zwischen der Förderpumpe 10 und der Hochdruckpumpe 18 ist in der 5 Verbindung 16 ein Kraftstoffilter 20 angeordnet, das als10 can also be driven mechanically, for example, by the internal combustion engine or a high-pressure pump 18 explained below. From the outlet of the feed pump 10, a connection 16 leads to the high-pressure pump 18. Between the feed pump 10 and the high-pressure pump 18, a fuel filter 20 is arranged in the 5 connection 16
Feinfilter ausgebildet ist und das von dem durch die Förderpumpe 10 geförderten Kraftstoff durchströmt wird. Das Kraftstoffilter 20 ist derart ausgelegt und dimensioniert, daß die von der Förderpumpe 10 geförderte KraftstoffmengeFine filter is formed and through which the fuel delivered by the feed pump 10 flows. The fuel filter 20 is designed and dimensioned such that the fuel quantity delivered by the feed pump 10
SO durch dieses hindurchtreten kann. Ein Wartungsintervall für einen Austausch des Kraftstoffilters 20 ist derart festgelegt, daß die Funktion des Kraftstoffilters 20 sichergestellt ist.SO can pass through it. A maintenance interval for an exchange of the fuel filter 20 is defined in such a way that the function of the fuel filter 20 is ensured.
!5 Die Hochdruckpumpe 18 weist beispielsweise mehrere Pumpenelemente 19 auf, die jeweils einen in einer Zylinderbohrung geführten Kolben aufweisen, der durch einen Antrieb 17 in einer Hubbewegung angetrieben wird. Der Antrieb 17 kann beispielsweise eine Nockenwelle aufweisen, auf der die Pumpenkolben der Pumpenelemente laufen, oder 5 eine Exzenterwelle und ein durch diese bewegtes Polygon, auf dem sich die Pumpenkolben abstützen. Die Hochdruckpumpe 18 wird vorzugsweise mechanisch durch die Brennkraftmaschine angetrieben. Der durch die Hochdruckpumpe 18 geförderte Kraftstoff wird über eine Verbindung 23 einem Speicher 245 The high-pressure pump 18 has, for example, a plurality of pump elements 19, each in one Have cylinder bore guided piston which is driven by a drive 17 in one stroke. The drive 17 can have, for example, a camshaft on which the pump pistons of the pump elements run, or 5 an eccentric shaft and a polygon moved through it, on which the pump pistons are supported. The high pressure pump 18 is preferably driven mechanically by the internal combustion engine. The fuel delivered by the high-pressure pump 18 becomes a reservoir 24 via a connection 23
L0 zugeführt. Jedes Pumpenelement 19 der Hochdruckpumpe 18 weist ein Einlaßventil 21 auf, das in das Pumpenelement 19 öffnet und durch das Kraftstoff von der Förderpumpe 10 her in das Pumpenelement 19 gelangen kann. Jedes Pumpenelement 19 weist außerdem ein Auslaßventil 22 auf, durch dasL0 fed. Each pump element 19 of the high-pressure pump 18 has an inlet valve 21, which opens into the pump element 19 and can get into the pump element 19 from the feed pump 10 through the fuel. Each pump element 19 also has an outlet valve 22 through which
L5 Kraftstoff zum Speicher 24 hin aus dem Pumpenelement 19 verdrängt werden kann. Für jeden Zylinder der Brennkraftmaschine ist ein Injektor 26 vorgesehen, durch den Kraftstoff in den Brennraum des Zylinders eingespritzt wird. Jeder Injektor 26 ist über eine Verbindung 28 mit demL5 fuel can be displaced from the pump element 19 to the reservoir 24. For each cylinder of the internal combustion engine, an injector 26 is provided, through which fuel is injected into the combustion chamber of the cylinder. Each injector 26 is connected to the connection 28
20 Speicher 24 verbunden und die Öffnung des Injektors 26 zur Kraftstoffeinspritzung wird durch ein elektrisch angesteuertes Ventil 30 gesteuert.20 memory 24 connected and the opening of the injector 26 for fuel injection is controlled by an electrically controlled valve 30.
In der Verbindung 28 zwischen dem Speicher 24 und dem 25 Injektor 26 kann eine Druckübersetzungseinrichtung 32 angeordnet sein, durch die der Druck des dem Injektor 26 zugeführten Kraftstoffs gegenüber dem im Speicher 24 herrschenden Druck nochmals erhöht wird.A pressure transmission device 32 can be arranged in the connection 28 between the reservoir 24 and the injector 26, by means of which the pressure of the fuel supplied to the injector 26 is increased again compared to the pressure prevailing in the reservoir 24.
30 In der Verbindung 16 der Förderpumpe 10 mit der30 In the connection 16 of the feed pump 10 with the
Hochdruckpumpe 18 ist eine Kraftstoffzumeßeinrichtung 34 vorgesehen, durch die der Druchfluß von Kraftstoff zur Hochdruckpumpe 18 eingestellt wird. Die Zumeßeinrichtung 34 weist ein elektrisch betätigtes Regelventil auf, das durchHigh-pressure pump 18, a fuel metering device 34 is provided, through which the flow of fuel to the high-pressure pump 18 is set. The metering device 34 has an electrically operated control valve, which by
35 einen Aktor 36 beispielsweise in Form eines Elektromagneten oder eines Piezoaktors geschaltet wird. Der Aktor 36 wird durch eine elektronische Steuereinrichtung 38 angesteuert. Am Speicher 24 ist ein Drucksensor 40 angeordnet, der mit der Steuereinrichtung 38 verbunden ist. Durch die Steuereinrichtung 38 wird der Aktor 36 derart angesteuert, daß die Kraftstoffzumeßeinrichtung 34 einen Durchfluß von Kraftstoff zur Hochdruckpumpe 18 einstellt, der erforderlich ist, um mit dem von der Hochdruckpumpe 18 geförderten Kraftstoff im Speicher 24 einen vorgegebenen Druck aufrechtzuerhalten.35 an actuator 36 is switched, for example in the form of an electromagnet or a piezo actuator. The actuator 36 is controlled by an electronic control device 38. A pressure sensor 40 is arranged on the memory 24 and is connected to the control device 38. The actuator 36 is controlled by the control device 38 in such a way that the fuel metering device 34 adjusts a flow of fuel to the high-pressure pump 18, which is required in order to maintain a predetermined pressure in the reservoir 24 with the fuel delivered by the high-pressure pump 18.
L OL O
Von der Verbindung 16 der Förderpumpe 10 mit der Hochdruckpumpe 18 kann stromaufwärts vor der Kraftstoffzumeßeinrichtung 34 eine zum Antrieb 17 der Hochdruckpumpe 18 führende Verbindung 48 vorgesehen sein,From the connection 16 of the feed pump 10 to the high-pressure pump 18, a connection 48 leading to the drive 17 of the high-pressure pump 18 can be provided upstream of the fuel metering device 34.
L5 durch die ein Teil des von der Förderpumpe 10 geförderten Kraftstoffs dem Antrieb 17 zu dessen Schmierung zugeführt wird. In der Verbindung 48 ist vorzugsweise ein zum Antrieb 17 hin öffnendes Druckventil 50 angeordnet, das erst bei Überschreiten eines vorgegebenen Druckes die Verbindung 48L5 through which part of the fuel delivered by the feed pump 10 is fed to the drive 17 for the lubrication thereof. A pressure valve 50, which opens toward the drive 17, is preferably arranged in the connection 48, and the connection 48 only when a predetermined pressure is exceeded
20 freigibt. Durch das Druckventil 52 ist sichergestellt, daß insbesondere beim Starten der Brennkraftmaschine, wenn ein hoher Druck im Speicher 24 erforderlich ist und dieser erst noch befüllt werden muß, die gesamte von der Förderpumpe 10 geförderte Kraftstoffmenge der Hochdruckpumpe 18 zugeführt20 releases. The pressure valve 52 ensures that, in particular when the internal combustion engine is started, if a high pressure is required in the accumulator 24 and this still has to be filled, the entire fuel quantity delivered by the feed pump 10 is supplied to the high-pressure pump 18
25 wird und kein Kraftstoff zur Schmierung des Antriebs 17 abgezweigt wird. Stromabwärts nach dem Druckventil 50 ist vorzugsweise eine Drosselstelle 52 vorgesehen, durch die der Durchfluß in der Verbindung 48 begrenzt wird. Stromabwärts nach dem Druckventil 50 und der Drosselstelle 52 kann von25 and no fuel for lubricating the drive 17 is branched off. A throttle point 52 is preferably provided downstream of the pressure valve 50, by means of which the flow in the connection 48 is limited. Downstream after the pressure valve 50 and the throttle point 52 can be from
SO der Verbindung 48 eine Rückleitung 54 abzweigen, die stromaufwärts vor dem Druckventil 50 in die Verbindung 16 mündet und in der eine Drosselstelle 56 vorgesehen sein kann. Alternativ kann die Rückleitung 54 auch in den Kraftstoffvorratsbehälter 12 münden. In Figur 2 ist eineSO branch off the connection 48 a return line 54, which opens upstream of the pressure valve 50 in the connection 16 and in which a throttle point 56 may be provided. Alternatively, the return line 54 can also open into the fuel reservoir 12. In Figure 2 is one
55 abweichende Ausführung der Kraftstoffeinspritzeinrichtung dargestellt, bei der die Verbindung 48 nicht zum Antriebsbereich 17 der Hochdruckpumpe 18 führt sondern zu einer Rückleitung 80 in den Kraftstoffvorratsbehälter 12. Bei dieser Ausführung erfolgt eine Schmierung des Antriebs 17 der Hochdruckpumpe 18 auf andere Weise, beispielsweise 5 indem der Antrieb 17 mit einem Schmierölkreislauf der55 different embodiment of the fuel injection device shown, in which the connection 48 is not to Drive area 17 of high-pressure pump 18 leads instead to a return line 80 into fuel reservoir 12. In this embodiment, drive 17 of high-pressure pump 18 is lubricated in a different way, for example, by driving 17 with a lubricating oil circuit
Brennkraftmaschine verbunden ist. Bei einer Mündung der Rückleitung 54 bzw. 80 in den Kraftstoffvorratsbehälter 12 wird ein ausgeglichener Temperaturhaushalt mit geringen Temperaturunterschieden zwischen dem Kraftstoff im L0 Vorratsbehälter 12 und dem im Kreislauf befindlichen Kraftstoff erreicht.Internal combustion engine is connected. When the return line 54 or 80 flows into the fuel reservoir 12, a balanced temperature balance is achieved with slight temperature differences between the fuel in the L0 reservoir 12 and the fuel in the circuit.
Von den Injektoren 26 führt ein Rücklauf 60 über eine Leitung ab, über den nicht eingespritzter KraftstoffA return line 60 leads from the injectors 26 via a line via which fuel is not injected
L5 abgeleitet wird. Der Rücklauf 60 von den Injektoren 26 wird jedoch nicht in den Kraftstoffvorratsbehälter 12 geleitet sondern mündet in die Verbindung 16 zwischen der Förderpumpe 10 und der Hochdruckpumpe 18. Der Rücklauf 60 mündet in die Verbindung 16 stromaufwärts vor derL5 is derived. However, the return 60 from the injectors 26 is not passed into the fuel tank 12 but opens into the connection 16 between the feed pump 10 and the high-pressure pump 18. The return 60 opens into the connection 16 upstream of the
20 Kraftstoffzumeßeinrichtung 34 und vor der Verbindung 48. Im Rücklauf 60 ist ein weiteres Kraftstoffilter 62 und stromabwärts nach diesem ein Rückschlagventil 64 angeordnet, das zur Mündung des Rücklaufs 60 in die Verbindung 16 hin öffnet. Das Rückschlagventil 64 weist ein durch eine Feder20 fuel metering device 34 and in front of the connection 48. A further fuel filter 62 is arranged in the return 60 and downstream of this a check valve 64 which opens towards the outlet 60 in the connection 16. The check valve 64 has a spring
25 66 in Schließrichtung belastetes Ventilglied 68 auf und öffnet somit erst wenn die durch den Druck im Rücklauf 60 auf das Ventilglied 68 bewirkte Kraft die Kraft der Schließfeder 66 überschreitet. Durch das Rückschlagventil 64 wird verhindert, daß bei höherem Druck in der Verbindung 1625 66 in the closing direction loaded valve member 68 and thus only opens when the force caused by the pressure in the return 60 on the valve member 68 exceeds the force of the closing spring 66. The check valve 64 prevents that at higher pressure in the connection 16
SO als im Rücklauf 60 von der Förderpumpe 10 geförderter Kraftstoff in den Rücklauf 60 gelangt. Durch das Rückschlagventil 64 kann außerdem ein vorgegebener Druck im Rücklauf 60 aufrechterhalten werden.SO reaches the return 60 as fuel delivered by the feed pump 10 in the return 60. A predetermined pressure in the return 60 can also be maintained by the check valve 64.
S5 Es kann vorgesehen sein, daß am Speicher 24 einS5 It can be provided that a memory 24
Druckbegrenzungsventil 70 angeordnet ist, das bei Überschreiten eines vorgegebenen Druckes im Speicher 24 öffnet und einen Ablauf 72 aus dem Speicher 24 freigibt, der in den Rücklauf 60 stromaufwärts vor dem weiteren Kraftstoffilter 62 mündet. Es kann außerdem vorgesehen sein, daß auch von der Druckübersetzungseinrichtung 32 ein Ablauf 74 abführt, beispielsweise für infolge einer Leckage an der Druckübersetzungseinrichtung 32 austretenden Kraftstoff oder einer zur Steuerung der Druckübersetzungseinrichtung 32 erforderlichen Kraftstoffmenge, wobei der Ablauf 74 ebenfalls in den Rücklauf 60 stromaufwärts vor dem weiteren Kraftstoffilter 62 mündet.Pressure relief valve 70 is arranged, which at Exceeding a predetermined pressure in the memory 24 opens and releases an outlet 72 from the memory 24, which opens into the return line 60 upstream of the further fuel filter 62. It can also be provided that an outlet 74 also discharges from the pressure booster 32, for example for fuel escaping as a result of a leak at the pressure booster 32 or a quantity of fuel required to control the pressure booster 32, the outlet 74 also flowing into the return 60 upstream from the another fuel filter 62 opens.
Das weitere Kraftstoffilter 62 im Rücklauf 60 ist als Feinfilter ausgebildet, wobei der durch den Rücklauf 60 strömende Kraftstoff nur geringe Verunreinigungen aus der Hochdruckpumpe 18, dem Speicher 24, derThe further fuel filter 62 in the return line 60 is designed as a fine filter, the fuel flowing through the return line 60 having only slight impurities from the high-pressure pump 18, the accumulator 24
Druckübersetzungseinrichtung 32, den Injektoren 26 oder den zwischen diesen vorhandenen Verbindungen enthält. Die Ausbildung und das Wartungsintervall des weiteren Kraftstoffilters 62 kann daher entsprechend diesenContains pressure translation device 32, the injectors 26 or the connections existing between them. The design and the maintenance interval of the further fuel filter 62 can therefore correspond to these
Bedingungen und unabhängig vom Kraftstoffilter 20 gewählt werden. Das weitere Kraftstoffilter 62 im Rücklauf kann insbesondere auch entsprechend der relativ hohen Temperatur des rückströmenden Kraftstoffs geeignet ausgebildet werden. Durch das Volumen des weiteren Kraftstoffilters 62 im Rücklauf können darüberhinaus Druckschwingungen und Druckstöße gedämpft werden, die bei Beendigung der Kraftstoffeinspritzung an den Injektoren 26 verursacht werden. Hierdurch wird eine nachteilige Beeinflußung der Einstellung des Durchflußes zur Hochdruckpumpe 18 durch die Zumeßeinrichtung 34 vermieden. Das weitere Kraftstoffilter 62 kann außerdem als Kraftstoffkühler dienen oder es kann im Rücklauf 60 ein separater Kraftstoffkühler vorgesehen sein, um die Temperatur des rückgeführten Kraftstoffs zu senken. Conditions and regardless of the fuel filter 20 can be selected. The additional fuel filter 62 in the return line can in particular also be suitably designed in accordance with the relatively high temperature of the returning fuel. The volume of the further fuel filter 62 in the return line can also dampen pressure fluctuations and pressure surges which are caused when the fuel injection at the injectors 26 is ended. In this way, an adverse influence on the setting of the flow to the high-pressure pump 18 by the metering device 34 is avoided. The further fuel filter 62 can also serve as a fuel cooler or a separate fuel cooler can be provided in the return 60 in order to lower the temperature of the returned fuel.

Claims

Ansprüche Expectations
1. Kraftstoffeinspritzeinrichtung für eine1. Fuel injector for one
Brennkraftmaschine mit einer Förderpumpe (10) , durch die Kraftstoff aus einem Kraftstoffvorratsbehälter (12) zu einer Hochdruckpumpe (18) gefördert wird, wobei durch die Hochdruckpumpe (18) Kraftstoff in einen Speicher (24) gefördert wird, mit dem wenigstens ein Injektor (26) verbunden ist, durch den Kraftstoff an derInternal combustion engine with a feed pump (10), through which fuel is conveyed from a fuel reservoir (12) to a high pressure pump (18), fuel being conveyed through the high pressure pump (18) into a reservoir (24) with which at least one injector (26 ) is connected by the fuel at the
Brennkraftmaschine eingespritzt wird, mit einem zwischen der Förderpumpe (10) und der Hochdruckpumpe (18) angeordneten Kraftstoffilter (20) , wobei ein Rücklauf (60) für Kraftstoff vom wenigstens einen Injektor (26) und/oder vom Speicher (24) zu einem Niederdruckbereich vorgesehen ist, dadurch gekennzeichnet, daß im Rücklauf (60) ein weiteres Kraftstoffilter (62) angeordnet ist und daß der Rücklauf (60) stromabwärts nach dem Kraftstoffilter (20) in die Verbindung (16) zwischen der Förderpumpe (10) und der Hochdruckpumpe (18) mündet.Internal combustion engine is injected, with a fuel filter (20) arranged between the feed pump (10) and the high pressure pump (18), with a return (60) for fuel from the at least one injector (26) and / or from the accumulator (24) to a low pressure area is provided, characterized in that a further fuel filter (62) is arranged in the return (60) and in that the return (60) downstream after the fuel filter (20) into the connection (16) between the feed pump (10) and the high pressure pump ( 18) flows out.
2. Kraftstoffeinspritzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß im Rücklauf (60) ein zur Mündung des Rücklaufs (60) in die Verbindung (16) hin öffnendes Rückschlagventil (64) angeordnet ist.2. Fuel injection device according to claim 1, characterized in that in the return (60) to the mouth of the return (60) in the connection (16) opening check valve (64) is arranged.
3. Kraftstoffeinspritzeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in der Verbindung (16) der Förderpumpe (10) mit der Hochdruckpumpe (18) eine3. Fuel injection device according to claim 1 or 2, characterized in that in the connection (16) of the feed pump (10) with the high pressure pump (18)
Kraftstoffzumeßeinrichtung (34) angeordnet ist, durch die der Durchfluß von Kraftstoff von der Förderpumpe (10) zur Hochdruckpumpe (18) derart eingestellt wird, daß durch die Hochdruckpumpe (18) ein vorgegebener Druck im Speicher (24) erzeugt wird, und daß der Rücklauf (60) in die Verbindung (16) stromaufwärts vor der Kraftstoffzumeßeinrichtung (34) mündet .Fuel metering device (34) is arranged through which the flow of fuel from the feed pump (10) to the high-pressure pump (18) is set such that a predetermined pressure is generated in the accumulator (24) by the high-pressure pump (18) and that the return line (60) into the connection (16) opens upstream of the fuel metering device (34).
4. Kraftstoffeinspritzeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwischen dem Speicher (24) und dem wenigstens einen Injektor (26) eine4. Fuel injection device according to one of claims 1 to 3, characterized in that between the memory (24) and the at least one injector (26) one
Druckübersetzungseinrichtung (32) vorgesehen ist, durch die der im Speicher (24) herrschende Druck erhöht wird, und daß die Druckübersetzungseinrichtung (32) einen in den Rücklauf (60) stromaufwärts vor dem weiteren Kraftstoffilter (62) mündenden Ablauf (74) aufweist.Pressure intensifier (32) is provided, by means of which the pressure prevailing in the accumulator (24) is increased, and that the pressure intensifier (32) has an outlet (74) opening into the return line (60) upstream of the further fuel filter (62).
5. Kraftstoffeinspritzeinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß im Rücklauf (60) ein Kraftstoffkühler angeordnet ist, als der 5. Fuel injection device according to one of the preceding claims, characterized in that a fuel cooler is arranged in the return (60) than the
EP02804534A 2002-02-08 2002-12-05 Fuel injection device for a combustion engine Expired - Lifetime EP1476654B1 (en)

Applications Claiming Priority (3)

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DE10205186 2002-02-08
DE10205186A DE10205186A1 (en) 2002-02-08 2002-02-08 Fuel injection device for an internal combustion engine
PCT/DE2002/004456 WO2003067072A1 (en) 2002-02-08 2002-12-05 Fuel injection device for a combustion engine

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EP1476654B1 EP1476654B1 (en) 2007-12-19

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US (1) US7044110B2 (en)
EP (1) EP1476654B1 (en)
JP (1) JP2005517120A (en)
KR (1) KR100941534B1 (en)
CN (1) CN100335774C (en)
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BR (1) BR0208724B1 (en)
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WO (1) WO2003067072A1 (en)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0205965D0 (en) * 2002-03-14 2002-04-24 Delphi Tech Inc Fuel system
DE10248467A1 (en) * 2002-10-17 2004-05-06 Robert Bosch Gmbh Fuel injection system with pressure intensifier and low-pressure circuit with reduced delivery rate
JP3915718B2 (en) * 2003-03-11 2007-05-16 株式会社デンソー Fuel supply pump
ES2280931T3 (en) * 2004-11-12 2007-09-16 C.R.F. Societa' Consortile Per Azioni HIGH PRESSURE PUMP WITH A FLOW REGULATION DEVICE FOR A FUEL INJECTION SYSTEM.
JP4508156B2 (en) * 2005-08-24 2010-07-21 株式会社デンソー Fuel supply device
JP5089679B2 (en) * 2006-03-30 2012-12-05 ボルボ ラストバグナー アーベー Fuel injection device
DE502007002209D1 (en) * 2006-06-27 2010-01-14 Alois Dotzer DIESEL ENGINEERED INTERNAL COMBUSTION ENGINE
GB2441309B (en) * 2006-08-18 2011-03-30 Parker Hannifin Corp De-aeration system
ATE531928T1 (en) * 2006-11-16 2011-11-15 Fiat Ricerche FUEL ADJUSTMENT AND FUEL FILTER DEVICE FOR A HIGH PRESSURE PUMP
DE102007000855B4 (en) * 2006-12-27 2020-06-10 Denso Corporation Fuel delivery device and storage fuel injection system having this
US20070272215A1 (en) * 2007-03-09 2007-11-29 Mazrek Ltd. Fuel Injection Sytem for Internal Combustion Engines
JP5112835B2 (en) * 2007-12-04 2013-01-09 株式会社ニフコ Fuel supply device
US7640919B1 (en) 2008-01-31 2010-01-05 Perkins Engines Company Limited Fuel system for protecting a fuel filter
US20090211556A1 (en) * 2008-02-25 2009-08-27 Perkins Engines Company Limited System for maintaining a pump inlet pressure
FR2929343A3 (en) * 2008-03-31 2009-10-02 Renault Sas Fuel return circuit for fuel injecting device in internal combustion engine, has closure pipe made of deformable material and provided in parallel to part of collecting pipe length so that pressure waves are returned to downstream portion
US8539934B2 (en) 2008-04-10 2013-09-24 Bosch Corporation Injection abnormality detection method and common rail fuel injection control system
ITMI20082209A1 (en) * 2008-12-12 2010-06-13 Bosch Gmbh Robert PLANT AND METHOD FOR FUEL FEED BETWEEN A TANK AND INTERNAL COMBUSTION ENGINE
JP5012844B2 (en) * 2009-03-31 2012-08-29 株式会社デンソー Fuel supply device
ITMI20091355A1 (en) * 2009-07-29 2011-01-30 Bosch Gmbh Robert FUEL SUPPLY SYSTEM TO AN INTERNAL COMBUSTION ENGINE
US8251046B2 (en) * 2009-07-30 2012-08-28 Ford Global Technologies, Llc Fuel system for an internal combustion engine
DE102009052600B4 (en) 2009-11-10 2022-07-07 Daimler Truck AG fuel injection system
DE102009052599B4 (en) 2009-11-10 2022-07-07 Daimler Truck AG fuel injection system
ITMI20092219A1 (en) * 2009-12-17 2011-06-18 Bosch Gmbh Robert FUEL SUPPLY SYSTEM FOR A DIESEL CYCLE ENGINE
DE102010027789A1 (en) * 2010-04-15 2011-10-20 Ford Global Technologies, Llc Fuel injection system for rapid pressure build-up when restarting the internal combustion engine with stop-start system
JP2012167559A (en) * 2011-02-10 2012-09-06 Denso Corp Fuel injection device
JP5345199B2 (en) * 2011-12-27 2013-11-20 株式会社小野測器 Fuel measurement system
US9051906B2 (en) * 2012-02-29 2015-06-09 Ford Global Technologies, Llc Diesel fuel system conditioning
CN102989711B (en) * 2012-12-04 2014-12-03 中国第一汽车股份有限公司无锡油泵油嘴研究所 Impurity collecting device for oil sprayer
DE102012224004A1 (en) * 2012-12-20 2014-06-26 Robert Bosch Gmbh High-pressure injection
US20140174409A1 (en) * 2012-12-21 2014-06-26 United Techologies Corporation Gear Pump Protection Valve
SE538000C2 (en) * 2014-05-14 2016-02-02 Scania Cv Ab Combustion engine fuel system and a method for regulating a fuel system
US9957940B2 (en) 2015-01-05 2018-05-01 Caterpillar Inc. Fluid conditioning module
US20160230720A1 (en) * 2015-02-09 2016-08-11 Caterpillar Inc. Fluid Conditioning Module
US9909468B2 (en) 2015-08-25 2018-03-06 Caterpillar Inc. Fluid conditioning system with recirculation loop and method for operating same
US10208727B2 (en) * 2015-12-28 2019-02-19 Caterpillar Inc. Fluid conditioning module
DE102018216176A1 (en) * 2018-09-21 2020-03-26 Robert Bosch Gmbh Fuel delivery device for an internal combustion engine
CN112112750A (en) * 2019-06-20 2020-12-22 罗伯特·博世有限公司 Fuel injection system
US11846246B2 (en) * 2021-05-27 2023-12-19 Thermo King Llc Methods and systems for controlling engine inlet pressure via a fuel delivery system of a transport climate control system

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715587C2 (en) * 1977-04-07 1986-07-03 Robert Bosch Gmbh, 7000 Stuttgart Fuel supply device for internal combustion engines
DE3107141A1 (en) * 1981-02-26 1982-09-09 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen ARRANGEMENT FOR COOLING THE FUEL IN AN OPERATING SYSTEM OF A DIESEL ENGINE WITH A CLOSED INJECTION CIRCUIT
SU1714183A1 (en) * 1990-01-03 1992-02-23 Институт Проблем Машиностроения Ан Усср Cryogenic fuel feed system of diesel engine
JPH04259657A (en) * 1991-02-12 1992-09-16 Mazda Motor Corp Fuel supply device of engine
RU2037068C1 (en) * 1991-06-03 1995-06-09 Акционерное общество "Ковровский экскаваторный завод" Fuel system for diesel
DE19539885A1 (en) * 1995-05-26 1996-11-28 Bosch Gmbh Robert Fuel supply system for IC engine
JP3939779B2 (en) * 1995-05-26 2007-07-04 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Fuel supply device for fuel supply of an internal combustion engine
JP3104612B2 (en) * 1996-03-22 2000-10-30 三菱自動車工業株式会社 Leak tester and leak test method
US5794598A (en) * 1996-06-21 1998-08-18 Stanadyne Automotive Corp. Fuel circuit and circulation method for fuel injection system
DE19740057C1 (en) * 1997-09-12 1999-01-21 Mannesmann Vdo Ag Fuel feed circuit for motor vehicle engine
JP3999855B2 (en) * 1997-09-25 2007-10-31 三菱電機株式会社 Fuel supply device
JPH11257188A (en) * 1998-03-10 1999-09-21 Hitachi Ltd Fuel return valve
FR2786534B1 (en) * 1998-11-27 2000-12-29 Siemens Automotive Sa FUEL SUPPLY DEVICE FOR AN INTERNAL COMBUSTION ENGINE, DIRECT INJECTION
US6142127A (en) * 1999-01-25 2000-11-07 Siemens Automotive Corporation Restriction structure for reducing gas formation in a high pressure fuel return line
DE19913477B4 (en) * 1999-03-25 2004-08-26 Robert Bosch Gmbh Method for operating a fuel supply device of an internal combustion engine, in particular a motor vehicle
JP3819208B2 (en) * 2000-03-01 2006-09-06 三菱電機株式会社 Variable discharge fuel supply system
DE10039773A1 (en) * 2000-08-16 2002-02-28 Bosch Gmbh Robert Fuel supply system
JP3924716B2 (en) * 2002-04-10 2007-06-06 ボッシュ株式会社 Accumulated fuel injection system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03067072A1 *

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Publication number Publication date
ATE381669T1 (en) 2008-01-15
US20040103883A1 (en) 2004-06-03
DE10205186A1 (en) 2003-08-21
WO2003067072A9 (en) 2004-06-10
BR0208724A (en) 2004-07-20
WO2003067072A1 (en) 2003-08-14
US7044110B2 (en) 2006-05-16
BR0208724B1 (en) 2011-06-28
KR20040080328A (en) 2004-09-18
JP2005517120A (en) 2005-06-09
KR100941534B1 (en) 2010-02-10
EP1476654B1 (en) 2007-12-19
CN1498308A (en) 2004-05-19
DE50211417D1 (en) 2008-01-31
CN100335774C (en) 2007-09-05

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