EP1977105B1 - Fuel delivery device - Google Patents

Fuel delivery device Download PDF

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Publication number
EP1977105B1
EP1977105B1 EP06841404.4A EP06841404A EP1977105B1 EP 1977105 B1 EP1977105 B1 EP 1977105B1 EP 06841404 A EP06841404 A EP 06841404A EP 1977105 B1 EP1977105 B1 EP 1977105B1
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EP
European Patent Office
Prior art keywords
fuel
pressure sensor
delivery device
fuel delivery
internal combustion
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.)
Active
Application number
EP06841404.4A
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German (de)
French (fr)
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EP1977105A1 (en
Inventor
Sabine Reichelt
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.)
Continental Automotive GmbH
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Continental Automotive GmbH
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Publication date
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Publication of EP1977105A1 publication Critical patent/EP1977105A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3082—Control of electrical fuel pumps
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M2037/085—Electric circuits therefor
    • F02M2037/087—Controlling fuel pressure valve

Definitions

  • the pressure sensor is arranged away from the internal combustion engine. Therefore, vibrations of the internal combustion engine are not transmitted to the pressure sensor. Furthermore, high temperatures generated by the internal combustion engine are not transmitted to the pressure sensor thanks to the invention.
  • the pressure sensor is therefore charged only with the maximum temperature of 60 ° of the fuel in the flow line. This makes it possible to use a particularly cost-effective pressure sensor.
  • the fuel delivery device according to the invention is thus particularly cost-effective.
  • a faulty measurement of the pressure sensor by a caused by the fine filter and / or a check valve pressure loss can be easily avoided according to another advantageous embodiment of the invention, when the pressure sensor is located immediately in front of a leading away from the flange connection of the flow line.

Description

Die Erfindung betrifft eine Kraftstofffördereinrichtung zur Versorgung einer Brennkraftmaschine eines Kraftfahrzeuges mit Kraftstoff aus einem Kraftstoffbehälter, mit einer in dem Kraftstoffbehälter angeordneten, elektromotorisch angetriebenen Kraftstoffpumpe, mit einer an der Kraftstoffpumpe angeschlossenen und zu der Brennkraftmaschine zu führenden Vorlaufleitung und mit einem Drucksensor zur Ermittlung des Drucks des zu der Brennkraftmaschine geförderten Kraftstoffs.The invention relates to a fuel delivery device for supplying an internal combustion engine of a motor vehicle with fuel from a fuel tank, with an arranged in the fuel tank, driven by an electric motor fuel pump, connected to the fuel pump and leading to the internal combustion engine supply line and with a pressure sensor for determining the pressure of to the internal combustion engine funded fuel.

Solche, einen Drucksensor aufweisenden Kraftstofffördereinrichtungen fördern Kraftstoff in Abhängigkeit von dem Bedarf der Brennkraftmaschine und sind aus der Praxis bekannt. Ein Beispiel einer solchen Vorrichtung ist in WO-2005/052349 gezeigt. Die Kraftstoffpumpe erzeugt einen vorgesehenen Druck und wird von einer Steuerelektronik nach den Werten des Drucksensors angesteuert. Bei den aus der Praxis bekannten Kraftstofffördereinrichtungen ist der Drucksensor an einer Einspritzleiste der Brennkraftmaschine angeordnet. Hierdurch ermöglicht der Drucksensor die genaue Erfassung des von der Kraftstoffpumpe erzeugten Drucks an der Brennkraftmaschine. Nachteilig bei der bekannten Kraftstofffördereinrichtung ist jedoch, dass der Drucksensor an der Brennkraftmaschine starken Vibrationen und sehr hohen Temperaturen ausgesetzt ist. Die Temperaturen an der Einspritzleiste der Brennkraftmaschine betragen häufig 110 °C. Daher erfordert die erfindungsgemäße Kraftstofffördereinrichtung einen sehr temperaturbeständigen und vibrationsbeständigen und damit kostenintensiven Drucksensor.Such fuel delivery devices having a pressure sensor will deliver fuel depending on the needs of the engine and are known in the art. An example of such a device is in WO-2005/052349 shown. The fuel pump generates a planned pressure and is controlled by an electronic control unit according to the values of the pressure sensor. In the case of the fuel delivery devices known from practice, the pressure sensor is arranged on an injection rail of the internal combustion engine. In this way, the pressure sensor allows the accurate detection of the pressure generated by the fuel pump on the internal combustion engine. A disadvantage of the known fuel delivery device, however, is that the pressure sensor is exposed to the internal combustion engine strong vibrations and very high temperatures. The temperatures at the injection rail of the internal combustion engine are often 110 ° C. Therefore, the fuel delivery device according to the invention requires a very temperature-resistant and vibration-resistant and thus cost-intensive pressure sensor.

Der Erfindung liegt das Problem zugrunde, eine Kraftstofffördereinrichtung der eingangs genannten Art so weiterzubilden, dass sie besonders kostengünstig zu fertigen ist.The invention is based on the problem, a fuel delivery device of the type mentioned in such a way that it is particularly inexpensive to manufacture.

Dieses Problem wird erfindungsgemäß dadurch gelöst, dass der Drucksensor an einem von der Brennkraftmaschine entfernten Abschnitt der Vorlaufleitung angeschlossen ist.This problem is inventively achieved in that the pressure sensor is connected to a remote from the engine section of the flow line.

Durch diese Gestaltung ist der Drucksensor von der Brennkraftmaschine entfernt angeordnet. Daher werden Vibrationen der Brennkraftmaschine nicht auf den Drucksensor übertragen.. Weiterhin werden hohe, von der Brennkräftmaschine erzeugte Temperaturen dank der Erfindung nicht auf den Drucksensor übertragen. Der Drucksensor wird daher nur mit der Temperatur von maximal 60° des Kraftstoffs in der Vorlaufleitung belastet. Hierdurch lässt sich ein besonders kostengünstiger Drucksensor einsetzen. Die erfindungsgemäße Kraftstofffördereinrichtung gestaltet sich hierdurch besonders kostengünstig.By this configuration, the pressure sensor is arranged away from the internal combustion engine. Therefore, vibrations of the internal combustion engine are not transmitted to the pressure sensor. Furthermore, high temperatures generated by the internal combustion engine are not transmitted to the pressure sensor thanks to the invention. The pressure sensor is therefore charged only with the maximum temperature of 60 ° of the fuel in the flow line. This makes it possible to use a particularly cost-effective pressure sensor. The fuel delivery device according to the invention is thus particularly cost-effective.

Eine mögliche Entweichung von Kraftstoffdämpfen aus dem Drucksensor in die Atmosphäre lässt sich gemäß einer vorteilhaften Weiterbildung der Erfindung einfach vermeiden, wenn der Drucksensor an einem innerhalb des Kraftstoffbehälters geführten Abschnitt der Vorlaufleitung angeschlossen ist. Hierdurch hat ein Anschluss des Drucksensors an die Vorlaufleitung keinen Kontakt zur Umgebung, so dass an dem Drucksensor durch Leckage oder Diffusion entweichender Kraftstoff innerhalb des Kraftstoffbehälters verbleibt. Vorzugsweise ist der Drucksensor ebenfalls innerhalb des Kraftstoffbehälters angeordnet.A possible escape of fuel vapors from the pressure sensor into the atmosphere can be according to an advantageous development of the invention easily avoided if the pressure sensor is connected to a guided inside the fuel tank section of the flow line. As a result, a connection of the pressure sensor to the flow line no contact with the environment, so that at the pressure sensor leakage or diffusion escaping fuel within the fuel tank remains. Preferably, the pressure sensor is also disposed within the fuel tank.

Die Montage der erfindungsgemäßen Kraftstofffördereinrichtung gestaltet sich besonders einfach, wenn der Drucksensor mit der Kraftstoffpumpe als bauliche Einheit gestaltet ist. In der Regel weist die Kraftstoffpumpe eine bauliche Einheit mit einem Schwalltopf und einem eine Montageöffnung des Kraftstoffbehälters verschließenden Flansch auf. Der Drucksensor kann daher einfach an einem dieser Bauteile befestigt werden und ist bei der Montage der Kraftstoffpumpe im Kraftstoffbehälter montiert. Weiterhin lassen sich durch diese Gestaltung der Drucksensor und die Bedarfssteuerung der Kraftstoffpumpe einfach außerhalb des Kraftstoffbehälters prüfen.The assembly of the fuel delivery device according to the invention is particularly simple if the pressure sensor is designed with the fuel pump as a structural unit. As a rule, the fuel pump has a structural unit with a swirl pot and a flange which closes a mounting opening of the fuel tank. The pressure sensor can therefore be easily attached to one of these components and is mounted during assembly of the fuel pump in the fuel tank. Furthermore, can be through this design simply check the pressure sensor and demand control of the fuel pump outside of the fuel tank.

Die erfindungsgemäße Kraftstofffördereinrichtung ist besonders kostengünstig herstellbar, wenn ein Feinfilter, der Drucksensor, ein Druckregler und ein Rückschlagventil als bauliche Einheit ausgebildet sind.The fuel delivery device according to the invention is particularly inexpensive to produce, if a fine filter, the pressure sensor, a pressure regulator and a check valve are designed as a structural unit.

Eine Kontaktierung des Drucksensors gestaltet sich besonders einfach und kostengünstig, wenn Anschlusskontakte zur Verbindung des Drucksensors mit einer Steuerelektronik für eine Bedarfssteuerung der Kraftstoffpumpe in einem eine Montageöffnung des Kraftstoffbehälters verschließenden Flansch angeordnet sind.A contacting of the pressure sensor is particularly simple and inexpensive, if connection contacts for connection of the pressure sensor with an electronic control system for a demand control of the fuel pump are arranged in a mounting opening of the fuel tank closing flange.

Die erfindungsgemäße Kraftstofffördereinrichtung gestaltet sich konstruktiv besonders einfach, wenn der Drucksensor in einem eine Montageöffnung des Kraftstoffbehälters verschließenden Flansch der Kraftstoffpumpe angeordnet ist.The fuel delivery device according to the invention is structurally particularly simple if the pressure sensor is arranged in a flange of the fuel pump which closes a mounting opening of the fuel tank.

Meist ist an dem Flansch ein häufig als Life-Time-Filter bezeichneter Feinfilter angeordnet. Hierbei gestaltet sich die erfindungsgemäße Kraftstofffördereinrichtung konstruktiv besonders einfach, wenn der Drucksensor in Strömungsrichtung gesehen zwischen der Kraftstoffpumpe und dem Feinfilter angeordnet ist.In most cases, a fine filter often referred to as a life-time filter is arranged on the flange. In this case, the fuel delivery device according to the invention structurally particularly simple, when the pressure sensor is arranged in the flow direction between the fuel pump and the fine filter.

Eine Fehlmessung des Drucksensors durch einen von dem Feinfilter und/oder einem Rückschlagventil hervorgerufenen Druckverlust lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach vermeiden, wenn der Drucksensor unmittelbar vor einem von dem Flansch weg führenden Anschluss der Vorlaufleitung angeordnet ist.A faulty measurement of the pressure sensor by a caused by the fine filter and / or a check valve pressure loss can be easily avoided according to another advantageous embodiment of the invention, when the pressure sensor is located immediately in front of a leading away from the flange connection of the flow line.

Im Leerlauf oder bei Lastwechsel kann das Rückschlagventil bei in Betrieb befindlicher Kraftstoffpumpe schließen. Dank der Erfindung lässt sich jedoch auch im Leerlauf oder bei Lastwechsel der von der Kraftstoffpumpe erzeugte Druck einfach messen, wenn der Drucksensor in Strömungsrichtung gesehen vor dem Rückschlagventil angeordnet ist. Ein weiterer Vorteil dieser Gestaltung besteht drin, dass eine Verschmutzung eines hinter dem Rückschlagventil angeordneten Feinfilters ebenfalls erfasst wird.When idling or when changing the load, the check valve may close when the fuel pump is in operation. Thanks to the invention, however, can also be idle or at Load change of the pressure generated by the fuel pump easy to measure when the pressure sensor is arranged upstream of the check valve seen in the flow direction. Another advantage of this design is that pollution of a fine filter arranged behind the check valve is also detected.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips sind mehrere davon in der Zeichnung dargestellt und werden nachfolgend beschrieben. Diese zeigt in:

Fig. 1
schematisch eine erfindungsgemäße Kraftstofffördereinrichtung,
Fig. 2
schematisch einen Teilbereich einer weiteren Ausführungsform der erfindungsgemäßen Kraftstofffördereinrichtung,
Fig. 3
schematisch einen Teilbereich einer weiteren Ausführungsform der erfindungsgemäßen Kraftstofffördereinrichtung mit einem vor einem Rückschlagventil angeordneten Drucksensor, Beispiel
Fig. 4
schematisch einen Teilbereich ein Beispiel der erfindungsgemäßen Kraftstofffördereinrichtung mit einem innerhalb eines Kraftstoffbehälters angeordneten Drucksensor.
The invention allows numerous embodiments. To further clarify its basic principle, several of them are shown in the drawing and will be described below. This shows in:
Fig. 1
schematically a fuel delivery device according to the invention,
Fig. 2
FIG. 2 schematically shows a partial region of a further embodiment of the fuel delivery device according to the invention, FIG.
Fig. 3
schematically a portion of another embodiment of the fuel conveyor according to the invention with a pressure sensor arranged in front of a check valve, example
Fig. 4
schematically a portion of an example of the fuel delivery device according to the invention with a disposed within a fuel tank pressure sensor.

Figur 1 zeigt schematisch eine Kraftstofffördereinrichtung 1 zur Förderung von Kraftstoff aus einem Kraftstoffbehälter 2 zu einer Brennkraftmaschine 3 eines Kraftfahrzeuges. Die Kraftstofffördereinrichtung 1 weist eine innerhalb des Kraftstoffbehälters 2 angeordnete Kraftstofffördereinheit 4 und eine von der Kraftstofffördereinheit 4 zu einer Einspritzleiste 5 der Brennkraftmaschine 3 führende Vorlaufleitung 6 auf. Die Kraftstofffördereinheit 4 hat eine Kraftstoffpumpe 7 mit einem Elektromotor 8 und einer in einem zum Sammeln von Kraftstoff vorgesehenen Schwalltopf 9 angeordneten Pumpenstufe 10. Der Schwalltopf 9 ist gegen den Boden des Kraftstoffbehälters 2 vorgespannt und stützt sich über eine Stütze 11 an einem eine Montageöffnung 12 des Kraftstoffbehälters 2 verschließenden Flansch 13 ab. In dem Flansch 13 ist ein Drucksensor 14 angeordnet, welcher an einem innerhalb des Kraftstoffbehälters 2 geführten Abschnitt der Vorlaufleitung 6 angeschlossen ist. Der Drucksensor 14 und der Elektromotor 8 der Kraftstoffpumpe sind über elektrische Leitungen 15, 16 mit einer Steuerelektronik 17 verbunden. Die Steuerelektronik 17 empfängt Daten des Drucksensors 14 und steuert in Abhängigkeit von den Daten des Drucksensors 14 die Kraftstoffpumpe 7 an. FIG. 1 schematically shows a fuel delivery device 1 for conveying fuel from a fuel tank 2 to an internal combustion engine 3 of a motor vehicle. The fuel delivery device 1 has a fuel delivery unit 4 arranged inside the fuel tank 2 and a supply line 6 leading from the fuel delivery unit 4 to an injection rail 5 of the internal combustion engine 3. The fuel delivery unit 4 has a fuel pump 7 The swirl pot 9 is biased against the bottom of the fuel tank 2 and is supported by a support 11 on a mounting opening 12 of the fuel tank 2 occluding flange 13 from an electric motor 8 and a provided for collecting fuel. In the flange 13, a pressure sensor 14 is arranged, which is connected to a guided inside the fuel tank 2 portion of the flow line 6. The pressure sensor 14 and the electric motor 8 of the fuel pump are connected via electrical lines 15, 16 with an electronic control unit 17. The control electronics 17 receives data from the pressure sensor 14 and controls the fuel pump 7 in dependence on the data of the pressure sensor 14.

Figur 2 zeigt einen Teilbereich einer weiteren Ausführungsform eines Teilbereichs der Kraftstofffördereinrichtung 1 aus Figur 1, bei dem an dem Flansch 13 ein Feinfilter 18 angeordnet ist. Der Drucksensor 14 ist an einem innerhalb des Feinfilters 18 geführten Abschnitt der Vorlaufleitung 6 angeschlossen. In Strömungsrichtung gesehen vor dem Drucksensor 14 ist ein Druckregler 19 oder ein Sicherheitsventil angeordnet. Zwischen der Kraftstoffpumpe 7 und dem Feinfilter 18 hat die Vorlaufleitung 6 zudem ein Rückschlagventil 20. FIG. 2 shows a portion of a further embodiment of a portion of the fuel conveyor 1 from FIG. 1 in which a fine filter 18 is arranged on the flange 13. The pressure sensor 14 is connected to a guided inside the fine filter 18 section of the flow line 6. As seen in the flow direction in front of the pressure sensor 14, a pressure regulator 19 or a safety valve is arranged. Between the fuel pump 7 and the fine filter 18, the supply line 6 also has a check valve 20th

Figur 3 zeigt einen Teilbereich einer weiteren Ausführungsform der Kraftstofffördereinrichtung 1, welche sich von der aus Figur 1 nur dadurch unterscheidet, dass der Drucksensor 14 in Strömungsrichtung gesehen vor einem Rückschlagventil 21 angeordnet ist. FIG. 3 shows a portion of a further embodiment of the fuel delivery device 1, which extends from the FIG. 1 only differs in that the pressure sensor 14 is arranged upstream of a check valve 21 seen in the flow direction.

Figur 4 zeigt ein Beispiel eines Teilbereichs der Kraftstofffördereinrichtung 1, welche sich von der aus Figur 2 dadurch unterscheidet, dass der Drucksensor 14 innerhalb des Kraftstoffbehälters 2 angeordnet ist. Weiterhin ist der Drucksensor 14 in einem zwischen der Kraftstoffpumpe 7 und dem vor dem Feinfilter 18 angeordneten Rückschlagventil 20 geführten Abschnitt der Vorlaufleitung 6 angeschlossen. Die zu der Steuerelektronik 17 aus Figur 1 geführte, elektrische Leitung 15 des Drucksensors 14 hat durch den Flansch 13 geführte Anschlusskontakte 22. FIG. 4 shows an example of a portion of the fuel conveyor 1, which differs from the FIG. 2 characterized in that the pressure sensor 14 is disposed within the fuel tank 2. Furthermore, the pressure sensor 14 is disposed in a between the fuel pump 7 and the front of the fine filter 18 arranged check valve 20 guided section of the flow line 6 connected. To the control electronics 17 off FIG. 1 guided, electrical line 15 of the pressure sensor 14 has through the flange 13 guided connection contacts 22nd

Claims (8)

  1. Fuel delivery device for supplying an internal combustion engine of a motor vehicle with fuel from a fuel tank (2), having an electromotively driven fuel pump (7) which is arranged in the fuel tank (2), having a feed line (6) which is connected to the fuel pump (7) and which leads to the internal combustion engine, and having a pressure sensor (14) for determining the pressure of the fuel fed to the internal combustion engine, wherein the pressure sensor (14) is connected to a section, which is remote from the internal combustion engine, of the feed line (6), characterized in that the pressure sensor (14) is arranged in a flange (13), which closes off an assembly opening (12) of the fuel tank (2), of the fuel pump (7).
  2. Fuel delivery device according to Claim 1,
    characterized in that the pressure sensor (14) is connected to a section, which is guided within the fuel tank (2), of the feed line (6).
  3. Fuel delivery device according to Claim 1 or 2, characterized in that the pressure sensor (14) is formed as a structural unit with the fuel pump (7).
  4. Fuel delivery device according to Claim 1 or 2, characterized in that a fine filter (18), the pressure sensor (14), a pressure regulator (19) and a non-return valve (20, 21) are formed as a structural unit.
  5. Fuel delivery device according to at least one of the preceding claims, characterized in that contact terminals (22) for connecting the pressure sensor (14) to control electronics (17) for demand control of the fuel pump (7) are arranged in a flange (13) which closes off an assembly opening (12) of the fuel tank (2).
  6. Fuel delivery device according to at least one of the preceding claims, characterized in that the pressure sensor (14) is arranged between the fuel pump (7) and the fine filter (18) as viewed in the flow direction.
  7. Fuel delivery device according to at least one of the preceding claims, characterized in that the pressure sensor (14) is arranged directly upstream of a connection, which leads away from the flange (13), of the feed line (6).
  8. Fuel delivery device according to at least one of the preceding claims, characterized in that the pressure sensor (14) is arranged upstream of the non-return valve (20, 21) as viewed in the flow direction.
EP06841404.4A 2006-01-13 2006-12-18 Fuel delivery device Active EP1977105B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006001878A DE102006001878A1 (en) 2006-01-13 2006-01-13 Fuel conveyor
PCT/EP2006/069809 WO2007082616A1 (en) 2006-01-13 2006-12-18 Fuel delivery device

Publications (2)

Publication Number Publication Date
EP1977105A1 EP1977105A1 (en) 2008-10-08
EP1977105B1 true EP1977105B1 (en) 2016-07-06

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Application Number Title Priority Date Filing Date
EP06841404.4A Active EP1977105B1 (en) 2006-01-13 2006-12-18 Fuel delivery device

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US (1) US8065989B2 (en)
EP (1) EP1977105B1 (en)
DE (1) DE102006001878A1 (en)
WO (1) WO2007082616A1 (en)

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Publication number Publication date
WO2007082616A1 (en) 2007-07-26
US20100154751A1 (en) 2010-06-24
US8065989B2 (en) 2011-11-29
EP1977105A1 (en) 2008-10-08
DE102006001878A1 (en) 2007-07-19

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