EP1882095A1 - Conveying device comprising a fuel pump - Google Patents

Conveying device comprising a fuel pump

Info

Publication number
EP1882095A1
EP1882095A1 EP06755239A EP06755239A EP1882095A1 EP 1882095 A1 EP1882095 A1 EP 1882095A1 EP 06755239 A EP06755239 A EP 06755239A EP 06755239 A EP06755239 A EP 06755239A EP 1882095 A1 EP1882095 A1 EP 1882095A1
Authority
EP
European Patent Office
Prior art keywords
fuel pump
fuel
control unit
power consumption
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.)
Granted
Application number
EP06755239A
Other languages
German (de)
French (fr)
Other versions
EP1882095B1 (en
Inventor
Bernd Rumpf
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
Original Assignee
Siemens VDO Automotive AG
VDO Automotive AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens VDO Automotive AG, VDO Automotive AG filed Critical Siemens VDO Automotive AG
Publication of EP1882095A1 publication Critical patent/EP1882095A1/en
Application granted granted Critical
Publication of EP1882095B1 publication Critical patent/EP1882095B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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

Definitions

  • the invention relates to a conveyor with a
  • Such conveyors are commonly used in today's vehicles and are therefore known.
  • Today's fuel ⁇ pumps will be regulated depending on the demand for fuel to the engine in the future.
  • the means for supply of the fuel pump with electrical current provides a current provided and an intended voltage clamping ⁇ optionally in a designated timing to the fuel pump.
  • fuel pumps are subject to natural wear over their lifetime and can also become dirty. Thereby, the efficiency of the fuel pump, which con- sumption in an increase of the electrical Leis ⁇ decreases at the same hydraulic power output effect of the fuel pump.
  • a particularly powerful fuel pump is used.
  • a workersein ⁇ breakage of the internal combustion engine is avoided after wear or contamination of the fuel pump.
  • the use of the particularly powerful fuel pump has the
  • the invention is based on the problem, a conveying device ⁇ tion of the type mentioned in such a way that the use of a particularly powerful fuel pump can be avoided.
  • This problem is solved according to the invention through a monitoring device for monitoring the power consumption of the fuel pump provided in hydraulic hoabga ⁇ be.
  • This design enables a declining hydraulic can see performance under expected power consumption of the power ⁇ material pump over the life or of pollution record.
  • the monitoring of power consumption of the motor fuel pump ⁇ thus ensures that the o- by wear of pollution reduced hydraulic power output is easily detected. Therefore, thanks to the invention, a Necessary to planned hydraulic power output ⁇ Liche fuel pump can be used and pollution when worn or Ver ⁇ clean or replace. Therefore, the conveyor according to the invention does not require a particularly powerful fuel pump.
  • Another advantage of the conveyor device according to the invention is that the error can be limited in a particularly simple manner, for example in the event of a power breakdown of the internal combustion engine. Thanks to the monitoring device can be determined whether the cause of the power dip can be, for example, in the pollution and / or wear ⁇ the fuel pump.
  • the conveying device designed to constructively particularly simple if the monitoring device in a versor the fuel pump with electrical current constricting ⁇ controller is arranged. Thereby also has the proper OF INVENTION ⁇ dung conveyor in a particularly clotting ⁇ ge number of components.
  • the comparison between the power consumption and the delivered Hydraulic power easily determine when the controller is connected to a fuel-determining engine control unit of the internal combustion engine. Since the engine control unit in any case determines the demand of the internal combustion engine on fuel, it may be this need to which the force ⁇ fuel pump with electrical current serving controller berffenn Ü. The control unit then supplies the power ⁇ fuel pump with sufficient current and voltage, is covered to the required from the motor control unit needs.
  • the comparison of the currently supplied current or the voltage with corresponding values of the new condition of the fuel pump is a measure of the actual wear of the fuel pump.
  • the current wear or pollution of the force ⁇ fuel pump can, according to another advantageous Wei ⁇ ter Struktur of the invention, in each operating state of the ⁇ fuel pump determine if the control unit to be conveyed a memory for a fuel pump characteristic of the power consumption of the fuel pump in response to the Requires fuel of the internal combustion engine.
  • the determination of the actual wear of the fuel pump requires according to another advantageous development of the invention has a particularly low structural expense when the control unit for determining the deviation of the required to be conveyed need for fuel hoauf ⁇ the fuel pump acquisition of the stored fuel ⁇ pump characteristic is trained.
  • This design allows the detection of wear or contamination of the fuel pump before the need for fuel of the engine at full load by the fuel pump can no longer be met.
  • the determined deviation of the current power consumption with the stored fuel pump characteristic curve is preferably stored and can be read out as part of an engine test.
  • the assembly of the conveyor according to the invention is particularly simple if the control unit within the
  • Conveyor preferably arranged in a flange to be inserted into the fuel tank.
  • Fig. 1 shows schematically an inventive wisdomeinrich- tung for supplying an internal combustion engine ei ⁇ nes motor vehicle with fuel
  • FIG. 2 shows a flow chart for monitoring a power consumption of a fuel pump of the inventive conveying device from FIG. 1.
  • FIG. 1 schematically shows a conveyor 1 for supplying an internal combustion engine 2 of a motor vehicle with fuel from a fuel tank 3.
  • the conveyor 1 has a arranged in a surge pot 4 force ⁇ fuel pump 5.
  • the surge chamber 4 is biased against the bottom of the fuel tank.
  • the fuel pump 5 för ⁇ changed the fuel from the surge chamber 4 via a feed ⁇ pipe 6 to the internal combustion engine 2.
  • An engine control unit 7 determines in dependence on the operating state of the motor ⁇ vehicle the requirements of the internal combustion engine 2 of fuel and is provided with a fuel pump 5 with electric Power supplying control unit 8 connected.
  • the control unit 8 has a memory 9 for a fuel pump characteristic.
  • the fuel pump identification line indicates which Leis ⁇ con- sumption, the fuel pump 5 has to be conveyed in the amount of fuel. Since the to-promoting amount of force ⁇ material to the fuel demand of the internal combustion engine 2 ent ⁇ talking determined, the control unit 8 from the Kraftstoffpum ⁇ pen characteristic has the required tension, or provide the necessary ⁇ chen power for the fuel pump 5. Further, the controller 8 a monitoring device 10, is compared with whether the power consumption of the fuel pump 5 for För ⁇ tion of the required amount of fuel sufficient.
  • the control unit 8 is also connected to a diagnostic display 11, which has, for example, a control lamp on a dashboard of the motor vehicle, and with a diagnostic socket 12 ⁇ connected.
  • the diagnosis socket 12 can be used to read out the values of the monitoring device 10 and the state of wear or contamination state of the fuel pump 5 with a corresponding diagnostic device, not shown.
  • control device 8 may be arranged in a flange 13 to be inserted into the fuel tank 3.
  • FIG. 2 shows a flow chart for controlling and monitoring the fuel pump 5 of Figure 1.
  • a first step Sl determines the engine control unit 7 may ⁇ Kraftstoffbe the internal combustion engine 2 and transmitted to the fuel ⁇ necessary to the control unit 8.
  • the control unit 8 determines in a step S2 based on a stored or learned fuel pump characteristic and the fuel consumption, the power consumption of the fuel pump 5 and supplies the fuel ⁇ fuel pump 5 according to the intended power consumption with electrical current, the electrical voltage or current pulses.
  • step S3 it is detected whether the demand of the internal combustion engine 2 is covered by fuel. If this is the case, the control unit 8 waits for a change in the requirements. 7.
  • step S4 If the demand of the internal combustion engine 2 for fuel is not covered, the supply of the fuel pump 5 with electric current is increased in a step S4.
  • monitoring device of the supervision 10 in a step S5 the deviation of the power consumption of the fuel pump 5 is determined by the fuel pump ⁇ characteristic. The determined deviation is a measure of the wear or contamination of the fuel pump 5.
  • step S6 it is compared whether the deviation exceeds a prescribed threshold value. If this is the case, the diagnostic display 11 is activated and a message is stored, which can be read from the diagnostic socket 12 ⁇ . If the intended threshold value is not exceeded, the control unit 8 again waits for a change in the request of the engine control unit 7

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

Disclosed is a conveying device (1) comprising a fuel pump (5) for supplying an internal combustion engine (2) of a motor vehicle with fuel. Said conveying device further comprises a monitoring apparatus (10) for determining the wear condition or the degree of soiling of the fuel pump (5). In order to do so, the monitoring apparatus (10) compares the power consumption to the hydraulic power of the fuel pump (5). A diagnostic display (11) is activated when a predefined value for the power consumption is exceeded.

Description

Fördereinrichtung mit einer KraftstoffpumpeConveyor with a fuel pump
Die Erfindung betrifft eine Fördereinrichtung mit einerThe invention relates to a conveyor with a
Kraftstoffpumpe zur Versorgung einer Brennkraftmaschine eines Kraftfahrzeuges mit Kraftstoff und mit einer Einrichtung zur Versorgung der Kraftstoffpumpe mit elektrischem Strom.Fuel pump for supplying an internal combustion engine of a motor vehicle with fuel and with a device for supplying the fuel pump with electric current.
Solche Fördereinrichtungen werden in heutigen Kraftfahrzeugen häufig eingesetzt und sind daher bekannt. Heutige Kraftstoff¬ pumpen werden künftig bedarfsabhängig nach dem Bedarf an Kraftstoff der Brennkraftmaschine geregelt. Die Einrichtung zur Versorgung der Kraftstoffpumpe mit elektrischem Strom liefert einen vorgesehenen Strom und eine vorgesehene Span¬ nung gegebenenfalls in einer vorgesehenen Taktung zu der Kraftstoffpumpe. Jedoch unterliegen Kraftstoffpumpen einem natürlichen Verschleiß über die Lebensdauer und können zudem verschmutzen. Hierdurch sinkt der Wirkungsgrad der Kraft- stoffpumpe, was sich in einer Erhöhung der elektrischen Leis¬ tungsaufnahme bei gleicher hydraulischer Leistungsabgabe der Kraftstoffpumpe auswirkt.Such conveyors are commonly used in today's vehicles and are therefore known. Today's fuel ¬ pumps will be regulated depending on the demand for fuel to the engine in the future. The means for supply of the fuel pump with electrical current provides a current provided and an intended voltage clamping ¬ optionally in a designated timing to the fuel pump. However, fuel pumps are subject to natural wear over their lifetime and can also become dirty. Thereby, the efficiency of the fuel pump, which con- sumption in an increase of the electrical Leis ¬ decreases at the same hydraulic power output effect of the fuel pump.
Um eine Verminderung der hydraulischen Leistungsabgabe bei gleicher elektrischer Leistungsaufnahme der Kraftstoffpumpe auszugleichen, wird meist eine besonders leistungsstarke Kraftstoffpumpe eingesetzt. Hierdurch wird ein Leistungsein¬ bruch der Brennkraftmaschine nach einem Verschleiß oder einer Verschmutzung der Kraftstoffpumpe vermieden. Der Einsatz der besonders leistungsstarken Kraftstoffpumpe hat jedoch denTo compensate for a reduction of the hydraulic power output with the same electrical power consumption of the fuel pump, usually a particularly powerful fuel pump is used. As a result, a Leistungssein ¬ breakage of the internal combustion engine is avoided after wear or contamination of the fuel pump. However, the use of the particularly powerful fuel pump has the
Nachteil, dass die Fördereinrichtung hierdurch sehr große Abmessungen aufweist und kostenintensiv ist und hierdurch die Stromaufnahme ansteigt.Disadvantage that the conveyor thereby has very large dimensions and is expensive and thereby increases the power consumption.
Der Erfindung liegt das Problem zugrunde, eine Fördereinrich¬ tung der eingangs genannten Art so weiterzubilden, dass sich der Einsatz einer besonders leistungsstarken Kraftstoffpumpe vermeiden lässt.The invention is based on the problem, a conveying device ¬ tion of the type mentioned in such a way that the use of a particularly powerful fuel pump can be avoided.
Dieses Problem wird erfindungsgemäß gelöst durch eine Überwa- chungseinrichtung zur Überwachung der Leistungsaufnahme der Kraftstoffpumpe bei vorgesehener hydraulischer Leistungsabga¬ be.This problem is solved according to the invention through a monitoring device for monitoring the power consumption of the fuel pump provided in hydraulic Leistungsabga ¬ be.
Durch diese Gestaltung lässt sich eine nachlassende hydrauli- sehe Leistung bei vorgesehener Leistungsaufnahme der Kraft¬ stoffpumpe über die Lebensdauer oder bei einer Verschmutzung erfassen. Die Überwachung der Leistungsaufnahme der Kraft¬ stoffpumpe stellt damit sicher, dass die durch Verschleiß o- der Verschmutzung verminderte hydraulische Leistungsabgabe einfach erfasst wird. Dank der Erfindung lässt sich daher eine für die vorgesehene hydraulische Leistungsabgabe erforder¬ liche Kraftstoffpumpe einsetzen und bei Verschleiß oder Ver¬ schmutzung reinigen oder auswechseln. Daher benötigt die erfindungsgemäße Fördereinrichtung keine besonders leistungs- starke Kraftstoffpumpe. Ein weiterer Vorteil der erfindungs¬ gemäßen Fördereinrichtung besteht darin, dass beispielsweise bei einem Leistungseinbruch der Brennkraftmaschine der Fehler auf besonders einfache Weise eingegrenzt werden kann. Dank der Überwachungseinrichtung kann festgestellt werden, ob die Ursache des Leistungseinbruchs beispielsweise in der Ver¬ schmutzung und/oder dem Verschleiß der Kraftstoffpumpe liegen kann .This design enables a declining hydraulic can see performance under expected power consumption of the power ¬ material pump over the life or of pollution record. The monitoring of power consumption of the motor fuel pump ¬ thus ensures that the o- by wear of pollution reduced hydraulic power output is easily detected. Therefore, thanks to the invention, a Necessary to planned hydraulic power output ¬ Liche fuel pump can be used and pollution when worn or Ver ¬ clean or replace. Therefore, the conveyor according to the invention does not require a particularly powerful fuel pump. Another advantage of the conveyor device according to the invention is that the error can be limited in a particularly simple manner, for example in the event of a power breakdown of the internal combustion engine. Thanks to the monitoring device can be determined whether the cause of the power dip can be, for example, in the pollution and / or wear ¬ the fuel pump.
Die erfindungsgemäße Fördereinrichtung gestaltet sich kon- struktiv besonders einfach, wenn die Überwachungseinrichtung in einem die Kraftstoffpumpe mit elektrischem Strom versor¬ genden Steuergerät angeordnet ist. Zudem weist die erfin¬ dungsgemäße Fördereinrichtung hierdurch eine besonders gerin¬ ge Anzahl an Bauteilen auf.The conveying device according to the invention designed to constructively particularly simple if the monitoring device in a versor the fuel pump with electrical current constricting ¬ controller is arranged. Thereby also has the proper OF INVENTION ¬ dung conveyor in a particularly clotting ¬ ge number of components.
Bei bedarfsgeregelten Kraftstoffpumpen lässt sich der Vergleich zwischen der Leistungsaufnahme und der abgegebenen hydraulischen Leistung gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach ermitteln, wenn das Steuergerät mit einem den Bedarf an Kraftstoff ermittelnden Motorsteuergerät der Brennkraftmaschine verbunden ist. Da das Motorsteuergerät ohnehin den Bedarf der Brennkraftmaschine an Kraftstoff ermittelt, kann es diesen Bedarf an das die Kraft¬ stoffpumpe mit elektrischem Strom versorgende Steuergerät ü- bermitteln. Das Steuergerät versorgt anschließend die Kraft¬ stoffpumpe mit ausreichend Strom und Spannung, bis der von dem Motorsteuergerät geforderte Bedarf gedeckt ist. Der Ver¬ gleich des aktuell gelieferten Stroms oder der Spannung mit entsprechenden Werten von dem Neuzustand der Kraftstoffpumpe ist ein Maß für den aktuellen Verschleiß der Kraftstoffpumpe.For demand-controlled fuel pumps, the comparison between the power consumption and the delivered Hydraulic power according to another advantageous embodiment of the invention easily determine when the controller is connected to a fuel-determining engine control unit of the internal combustion engine. Since the engine control unit in any case determines the demand of the internal combustion engine on fuel, it may be this need to which the force ¬ fuel pump with electrical current serving controller bermitteln Ü. The control unit then supplies the power ¬ fuel pump with sufficient current and voltage, is covered to the required from the motor control unit needs. The comparison of the currently supplied current or the voltage with corresponding values of the new condition of the fuel pump is a measure of the actual wear of the fuel pump.
Der aktuelle Verschleiß oder die Verschmutzung der Kraft¬ stoffpumpe lässt sich gemäß einer anderen vorteilhaften Wei¬ terbildung der Erfindung in jedem Betriebszustand der Kraft¬ stoffpumpe ermitteln, wenn das Steuergerät einen Speicher für eine Kraftstoffpumpen-Kennlinie der Leistungsaufnahme der Kraftstoffpumpe in Abhängigkeit von dem zu fördernden Bedarf an Kraftstoff der Brennkraftmaschine aufweist.The current wear or pollution of the force ¬ fuel pump can, according to another advantageous Wei ¬ terbildung of the invention, in each operating state of the ¬ fuel pump determine if the control unit to be conveyed a memory for a fuel pump characteristic of the power consumption of the fuel pump in response to the Requires fuel of the internal combustion engine.
Die Ermittlung des aktuellen Verschleißes der Kraftstoffpumpe erfordert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen baulichen Aufwand, wenn das Steuergerät zur Ermittlung der Abweichung der für den zu fördernden Bedarf an Kraftstoff erforderlichen Leistungsauf¬ nahme der Kraftstoffpumpe von der abgespeicherten Kraftstoff¬ pumpen-Kennlinie ausgebildet ist. Diese Gestaltung ermöglicht die Erfassung des Verschleißes oder der Verschmutzung der Kraftstoffpumpe bereits bevor der Bedarf an Kraftstoff der Brennkraftmaschine bei Volllast durch die Kraftstoffpumpe nicht mehr gedeckt werden kann. Die ermittelte Abweichung der aktuellen Leistungsaufnahme mit der abgespeicherten Kraft- stoffpumpen-Kennlinie wird vorzugsweise abgespeichert und kann im Rahmen eines Motortestes ausgelesen werden. Eine sofortige Meldung des Erreichens der Verschleißgrenze oder des zulässigen Verschmutzungsgrades der Kraftstoffpumpe lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach erzeugen, wenn das Steuergerät zur Ü- bermittlung der Abweichung der Leistungsaufnahme mit der ab¬ gespeicherten Kraftstoffpumpen-Kennlinie mit einer Diagnose¬ anzeige und/oder einer Diagnosebuchse verbunden ist.The determination of the actual wear of the fuel pump requires according to another advantageous development of the invention has a particularly low structural expense when the control unit for determining the deviation of the required to be conveyed need for fuel Leistungsauf ¬ the fuel pump acquisition of the stored fuel ¬ pump characteristic is trained. This design allows the detection of wear or contamination of the fuel pump before the need for fuel of the engine at full load by the fuel pump can no longer be met. The determined deviation of the current power consumption with the stored fuel pump characteristic curve is preferably stored and can be read out as part of an engine test. An immediate message of reaching the wear limit or the permissible degree of contamination of the fuel pump can be easily generated according to another advantageous embodiment of the invention, if the control unit for Ü bermittlung the deviation of the power consumption with the ¬ stored fuel pump characteristic with a diagnostic ¬ display and / or a diagnostic socket is connected.
Die Montage der erfindungsgemäßen Fördereinrichtung gestaltet sich besonders einfach, wenn das Steuergerät innerhalb derThe assembly of the conveyor according to the invention is particularly simple if the control unit within the
Fördereinrichtung, vorzugsweise in einem in den Kraftstoffbehälter einzusetzenden Flansch angeordnet ist.Conveyor, preferably arranged in a flange to be inserted into the fuel tank.
Die Erfindung lässt zahlreiche Aus führungs formen zu. Zur wei- teren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt inThe invention allows for many embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in
Fig. 1 schematisch eine erfindungsgemäße Fördereinrich- tung zur Versorgung einer Brennkraftmaschine ei¬ nes Kraftfahrzeuges mit Kraftstoff,Fig. 1 shows schematically an inventive Fördereinrich- tung for supplying an internal combustion engine ei ¬ nes motor vehicle with fuel,
Fig. 2 ein Flussdiagramm zur Überwachung einer Leistungsaufnahme einer Kraftstoffpumpe der erfin- dungsgemäßen Fördereinrichtung aus Figur 1.2 shows a flow chart for monitoring a power consumption of a fuel pump of the inventive conveying device from FIG. 1.
Figur 1 zeigt schematisch eine Fördereinrichtung 1 zur Versorgung einer Brennkraftmaschine 2 eines Kraftfahrzeuges mit Kraftstoff aus einem Kraftstoffbehälter 3. Die Fördereinrich- tung 1 hat eine in einem Schwalltopf 4 angeordnete Kraft¬ stoffpumpe 5. Der Schwalltopf 4 ist gegen den Boden des Kraftstoffbehälters 3 vorgespannt. Die Kraftstoffpumpe 5 för¬ dert den Kraftstoff aus dem Schwalltopf 4 über eine Vorlauf¬ leitung 6 zu der Brennkraftmaschine 2. Ein Motorsteuergerät 7 ermittelt in Abhängigkeit von dem Betriebszustand des Kraft¬ fahrzeuges den Bedarf der Brennkraftmaschine 2 an Kraftstoff und ist mit einem die Kraftstoffpumpe 5 mit elektrischem Strom versorgenden Steuergerät 8 verbunden. Das Steuergerät 8 weist einen Speicher 9 für eine Kraftstoffpumpen-Kennlinie auf. Die Kraftstoffpumpen-Kennlinie gibt an, welche Leis¬ tungsaufnahme die Kraftstoffpumpe 5 bei der zu fördernden Menge an Kraftstoff hat. Da die zu fördernde Menge an Kraft¬ stoff dem Kraftstoffbedarf der Brennkraftmaschine 2 ent¬ spricht, ermittelt das Steuergerät 8 aus der Kraftstoffpum¬ pen-Kennlinie die erforderliche Spannung oder den erforderli¬ chen Strom für die Kraftstoffpumpe 5. Weiterhin hat das Steu- ergerät 8 eine Überwachungseinrichtung 10, mit der verglichen wird, ob die Leistungsaufnahme der Kraftstoffpumpe 5 zur För¬ derung der erforderlichen Menge an Kraftstoff ausreicht. Das Steuergerät 8 ist zudem mit einer Diagnoseanzeige 11, welches beispielsweise eine Kontrolllampe auf einem Armaturenbrett des Kraftfahrzeuges hat, und mit einer Diagnosebuchse 12 ver¬ bunden. Über die Diagnosebuchse 12 lassen sich mit einem entsprechenden, nicht dargestellten Diagnosegerät die Werte der Überwachungseinrichtung 10 und der Verschleißzustand oder Verschmutzungszustand der Kraftstoffpumpe 5 auslesen.Figure 1 schematically shows a conveyor 1 for supplying an internal combustion engine 2 of a motor vehicle with fuel from a fuel tank 3. The conveyor 1 has a arranged in a surge pot 4 force ¬ fuel pump 5. The surge chamber 4 is biased against the bottom of the fuel tank. 3 The fuel pump 5 för ¬ changed the fuel from the surge chamber 4 via a feed ¬ pipe 6 to the internal combustion engine 2. An engine control unit 7 determines in dependence on the operating state of the motor ¬ vehicle the requirements of the internal combustion engine 2 of fuel and is provided with a fuel pump 5 with electric Power supplying control unit 8 connected. The control unit 8 has a memory 9 for a fuel pump characteristic. The fuel pump identification line indicates which Leis ¬ con- sumption, the fuel pump 5 has to be conveyed in the amount of fuel. Since the to-promoting amount of force ¬ material to the fuel demand of the internal combustion engine 2 ent ¬ talking determined, the control unit 8 from the Kraftstoffpum ¬ pen characteristic has the required tension, or provide the necessary ¬ chen power for the fuel pump 5. Further, the controller 8 a monitoring device 10, is compared with whether the power consumption of the fuel pump 5 for För ¬ tion of the required amount of fuel sufficient. The control unit 8 is also connected to a diagnostic display 11, which has, for example, a control lamp on a dashboard of the motor vehicle, and with a diagnostic socket 12 ¬ connected. The diagnosis socket 12 can be used to read out the values of the monitoring device 10 and the state of wear or contamination state of the fuel pump 5 with a corresponding diagnostic device, not shown.
In einer alternativen, nicht dargestellten Ausführungs form kann das Steuergerät 8 in einem in den Kraftstoffbehälter 3 einzusetzenden Flansch 13 angeordnet sein.In an alternative embodiment, not shown, the control device 8 may be arranged in a flange 13 to be inserted into the fuel tank 3.
Figur 2 zeigt ein Flussdiagramm zur Ansteuerung und Überwachung der Kraftstoffpumpe 5 aus Figur 1. In einem ersten Schritt Sl ermittelt das Motorsteuergerät 7 den Kraftstoffbe¬ darf der Brennkraftmaschine 2 und übermittelt den Kraftstoff¬ bedarf an das Steuergerät 8. Das Steuergerät 8 ermittelt in einem Schritt S2 anhand einer abgespeicherten oder gelernten Kraftstoffpumpen-Kennlinie und dem Kraftstoffbedarf die Leistungsaufnahme der Kraftstoffpumpe 5 und versorgt die Kraft¬ stoffpumpe 5 entsprechend der vorgesehenen Leistungsaufnahme mit elektrischem Strom, der elektrischen Spannung oder Strom- impulsen. In einem Schritt S3 wird erfasst, ob der Bedarf der Brennkraftmaschine 2 an Kraftstoff gedeckt ist. Ist dies der Fall, wartet das Steuergerät 8 auf eine Änderung der Anforde- rung des Motorsteuergerätes 7. Sofern der Bedarf der Brennkraftmaschine 2 an Kraftstoff nicht gedeckt ist, wird die Versorgung der Kraftstoffpumpe 5 mit elektrischem Strom in einem Schritt S4 erhöht. Gleichzeitig wird von der Überwa- chungseinrichtung 10 in einem Schritt S5 die Abweichung der Leistungsaufnahme der Kraftstoffpumpe 5 von der Kraftstoff¬ pumpen-Kennlinie ermittelt. Die ermittelte Abweichung ist ein Maß für den Verschleiß oder die Verschmutzung der Kraftstoffpumpe 5. In einem Schritt S6 wird verglichen, ob die Abwei- chung einen vorgesehenen Schwellwert überschreitet. Wenn dies der Fall ist, wird die Diagnoseanzeige 11 aktiviert und eine Meldung abgespeichert, welche über die Diagnosebuchse 12 aus¬ gelesen werden kann. Wird der vorgesehene Schwellwert nicht überschritten, wartet das Steuergerät 8 wieder auf eine Ände- rung der Anforderung des Motorsteuergerätes 7 Figure 2 shows a flow chart for controlling and monitoring the fuel pump 5 of Figure 1. In a first step Sl determines the engine control unit 7 may ¬ Kraftstoffbe the internal combustion engine 2 and transmitted to the fuel ¬ necessary to the control unit 8. The control unit 8 determines in a step S2 based on a stored or learned fuel pump characteristic and the fuel consumption, the power consumption of the fuel pump 5 and supplies the fuel ¬ fuel pump 5 according to the intended power consumption with electrical current, the electrical voltage or current pulses. In a step S3, it is detected whether the demand of the internal combustion engine 2 is covered by fuel. If this is the case, the control unit 8 waits for a change in the requirements. 7. If the demand of the internal combustion engine 2 for fuel is not covered, the supply of the fuel pump 5 with electric current is increased in a step S4. At the same time monitoring device of the supervision 10 in a step S5, the deviation of the power consumption of the fuel pump 5 is determined by the fuel pump ¬ characteristic. The determined deviation is a measure of the wear or contamination of the fuel pump 5. In a step S6, it is compared whether the deviation exceeds a prescribed threshold value. If this is the case, the diagnostic display 11 is activated and a message is stored, which can be read from the diagnostic socket 12 ¬ . If the intended threshold value is not exceeded, the control unit 8 again waits for a change in the request of the engine control unit 7

Claims

Patentansprüche claims
1. Fördereinrichtung mit einer Kraftstoffpumpe zur Versorgung einer Brennkraftmaschine eines Kraftfahrzeuges mit Kraftstoff und mit einer Einrichtung zur Versorgung der Kraftstoffpumpe mit elektrischem Strom, gekennzeichnet durch eine Überwachungseinrichtung (10) zur Überwachung der Leistungsaufnahme der Kraftstoff¬ pumpe (5) bei vorgesehener hydraulischer Leistungsabga- be.1. conveyor with a fuel pump for supplying an internal combustion engine of a motor vehicle with fuel and with a device for supplying the fuel pump with electric current, characterized by a monitoring device (10) for monitoring the power consumption of the fuel ¬ pump (5) at the provided hydraulic Leistungsabga- be ,
2. Fördereinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Überwachungseinrichtung2. A conveyor according to claim 1, characterized in that the monitoring device
(10) in einem die Kraftstoffpumpe (5) mit elektrischem Strom versorgenden Steuergerät (8) angeordnet ist.(10) is arranged in a the fuel pump (5) supplying electrical power control unit (8).
3. Fördereinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Steuergerät (8) mit ei¬ nem den Bedarf an Kraftstoff ermittelnden Motorsteuer- gerät (7) der Brennkraftmaschine (2) verbunden ist.3. A conveyor according to claim 1 or 2, characterized in that the control unit (8) with ei ¬ nem the fuel-determining engine control unit (7) of the internal combustion engine (2) is connected.
4. Fördereinrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Steuergerät (8) einen Speicher (9) für eine Kraft- stoffpumpen-Kennlinie der Leistungsaufnahme der Kraftstoffpumpe (5) in Abhängigkeit von dem zu fördernden Bedarf an Kraftstoff der Brennkraftmaschine (2) aufweist .4. A conveyor according to at least one of the preceding claims, characterized in that the control device (8) has a memory (9) for a fuel pump characteristic of the power consumption of the fuel pump (5) in dependence on the fuel demand of the internal combustion engine ( 2).
5. Fördereinrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Steuergerät (8) zur Ermittlung der Abweichung der für den zu fördernden Bedarf an Kraftstoff erforderlichen Leistungsaufnahme der Kraftstoffpumpe (5) von der abgespeicherten Kraftstoffpumpen-Kennlinie ausgebildet ist. 5. A conveyor according to at least one of the preceding claims, characterized in that the control unit (8) for determining the deviation of the required for the fuel demand of fuel consumption of the fuel pump (5) is formed by the stored fuel pump characteristic.
6. Fördereinrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Steuergerät (8) zur Übermittlung der Abweichung der Leistungsaufnahme mit der abgespeicherten Kraftstoff- pumpen-Kennlinie mit einer Diagnoseanzeige (11) und/oder einer Diagnosebuchse (12) verbunden ist.6. A conveyor according to at least one of the preceding claims, characterized in that the control unit (8) for transmitting the deviation of the power consumption with the stored fuel pump characteristic with a diagnostic indicator (11) and / or a diagnostic socket (12) is connected.
7. Fördereinrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Steuergerät (8) innerhalb der Fördereinrichtung (1), vorzugsweise in einem in den Kraftstoffbehälter (3) einzusetzenden Flansch (13) angeordnet ist. 7. A conveyor according to at least one of the preceding claims, characterized in that the control device (8) within the conveyor (1), preferably in a in the fuel tank (3) to be used flange (13) is arranged.
EP06755239.8A 2005-05-19 2006-05-18 Conveying device comprising a fuel pump Expired - Fee Related EP1882095B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005023189A DE102005023189A1 (en) 2005-05-19 2005-05-19 Conveyor with a fuel pump
PCT/EP2006/062404 WO2006122963A1 (en) 2005-05-19 2006-05-18 Conveying device comprising a fuel pump

Publications (2)

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EP1882095A1 true EP1882095A1 (en) 2008-01-30
EP1882095B1 EP1882095B1 (en) 2013-07-17

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US (1) US7784446B2 (en)
EP (1) EP1882095B1 (en)
JP (1) JP5108753B2 (en)
KR (1) KR20080011436A (en)
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WO (1) WO2006122963A1 (en)

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WO2006122963A1 (en) 2006-11-23
KR20080011436A (en) 2008-02-04
US20080276909A1 (en) 2008-11-13
EP1882095B1 (en) 2013-07-17
JP2008540926A (en) 2008-11-20
US7784446B2 (en) 2010-08-31
DE102005023189A1 (en) 2006-11-23
JP5108753B2 (en) 2012-12-26

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