EP1002194A1 - Fuel supply device for supplying fuel to an internal combustion engine - Google Patents

Fuel supply device for supplying fuel to an internal combustion engine

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Publication number
EP1002194A1
EP1002194A1 EP98966151A EP98966151A EP1002194A1 EP 1002194 A1 EP1002194 A1 EP 1002194A1 EP 98966151 A EP98966151 A EP 98966151A EP 98966151 A EP98966151 A EP 98966151A EP 1002194 A1 EP1002194 A1 EP 1002194A1
Authority
EP
European Patent Office
Prior art keywords
fuel
circuit
accumulator
control device
electric
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
EP98966151A
Other languages
German (de)
French (fr)
Other versions
EP1002194B1 (en
Inventor
Kurt Frank
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 EP1002194A1 publication Critical patent/EP1002194A1/en
Application granted granted Critical
Publication of EP1002194B1 publication Critical patent/EP1002194B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M37/14—Feeding by means of driven pumps the pumps being combined with other apparatus
    • 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

Definitions

  • Fuel supply system for supplying fuel for an internal combustion engine
  • the invention relates to a fuel supply system for supplying fuel for an internal combustion engine, with an electric fuel pump, which is supplied with current via a circuit to convey fuel from a fuel tank into a fuel storage device, and with a control device which ensures that the circuit of the Electric fuel pump is interrupted when the
  • Fuel storage is full and is closed when the fuel storage is empty.
  • the amount of fuel contained in the fuel accumulator is recorded by a level sensor.
  • a fill level sensor causes additional costs and is prone to failure if the fuel accumulator is filled at a high frequency.
  • the invention is therefore based on the problem of providing a fuel supply system which can be produced inexpensively and which operates without problems even at a high filling frequency of the fuel accumulator.
  • the problem is with a fuel supply system for supplying fuel to an internal combustion engine, with an electric fuel pump that is supplied with current via a circuit to deliver fuel from a fuel tank into a fuel accumulator, and with one
  • Control device which ensures that the circuit of the electric fuel pump is interrupted when the fuel accumulator is full and is closed when the fuel accumulator is empty, in that the control device is designed so that it the increasing emptying of the fuel accumulator from the fuel consumption calculates the internal combustion engine and ensures that the electric fuel pump is switched on when the fuel level in the fuel storage reaches a selectable setpoint. Any desired value can be selected as the setpoint, which lies between the maximum and the minimum volume of the fuel accumulator. This makes it possible for other signals, which may be in the form of a characteristic diagram, to be taken into account when controlling the electric fuel pump. Further signals are e.g. on:
  • a special embodiment of the invention is characterized in that a switch is provided in the circuit which, when the fuel reservoir is full, interrupts the circuit of the electric fuel pump or emits a corresponding signal to the control device.
  • a switch is provided in the circuit which, when the fuel reservoir is full, interrupts the circuit of the electric fuel pump or emits a corresponding signal to the control device.
  • Switch positions are provided, the circuit being open in one switching position and closed in the other switching position.
  • the aforementioned switch outputs the signal to the control device that the fuel accumulator is full, the circuit of the electric fuel pump is interrupted by the relay.
  • all other signals can be processed in the control device and taken into account via the relay when controlling the electric fuel pump.
  • the switch can then also be closed when de-energized. If there is too little fuel in the fuel tank, the circuit is closed again by the relay. This has the advantage that the circuits causing wear are distributed to the switch and the relay.
  • Figures 1 to 3 show three different embodiments of a fuel supply system according to the present invention.
  • Fuel supply system comprises a fuel tank 1, from which an electric fuel pump 2 draws fuel.
  • the electric fuel pump 2 conveys the drawn-in fuel into a fuel accumulator 3, which surrounds the electric fuel pump 2.
  • the fuel accumulator 3 comprises a membrane 4 against which a spring 5 is biased.
  • the membrane 4 can be moved back and forth depending on the amount of fuel contained in the fuel accumulator 3, as indicated by the double arrow 6.
  • the fuel drawn from the fuel tank 1 reaches the injection valves (not shown) via a line 7 from the fuel accumulator 3 or directly from the electric fuel pump 2.
  • An on-off switch 8 is attached to the fuel accumulator 3.
  • the switch 8 is actuated by an actuator 9 which is rigidly connected to the reciprocating membrane 4.
  • the electric fuel pump 2 is connected via a circuit 20, which comprises two power lines 10 and 11, to a power supply unit, which is indicated at 13 by plus and minus.
  • the on-off switch 8 and a relay 14 are provided in the power line 11.
  • the relay 14 is connected to a control device 16 via a control line 15.
  • the circuit shown in Figure 1 works as follows. When the fuel accumulator is full, the actuating element 9 comes to a stop against the switch 8 and actuates it. The circuit 20 is interrupted by the actuation of the switch 8. This interruption of the circuit is registered by the control device 16. The control device 16 then ensures that the relay 14 in the currentless circuit 20 opens. The switch 8 closes after the contact 9 is lifted back into the closed state. The switch 8 is thus again in its initial state, the circuit 20 still being interrupted.
  • various values and / or signals are input into the control device 16.
  • This can be, for example, the current fuel level in the fuel tank 1, which is detected by a corresponding sensor.
  • the fill level in the fuel accumulator 3 is calculated from the difference between the maximum quantity of fuel that the fuel accumulator 3 can hold and the quantity of fuel that is supplied to the internal combustion engine from the fuel tank becomes.
  • the control device thus recognizes when the fuel storage 3 falls below a certain target value. In such a case, the relay 14 is closed, so that the circuit 20 is closed and the electric fuel pump 2 fuel in the
  • Fuel storage 3 promotes. When the fuel storage 3 is full, the cycle starts again.
  • FIG. 2 shows a second embodiment of a fuel supply system according to the invention.
  • the basic structure of this embodiment is the same as that of the previously described embodiment and will not be described again to avoid repetition.
  • the same parts are provided with the same reference symbols.
  • the switch 8 in the embodiment shown in Figure 2 is not attached in the circuit 20 of the electric fuel pump. As indicated in FIG. 2 by a line 22, the switch 8 is coupled to the control device 16.
  • the switch 8 can be designed either as an on-off switch or as a proximity switch.
  • the circuit shown in Figure 2 works as follows. When the fuel accumulator 3 is full, the switch 8 emits a corresponding signal to the control device 16. The control device 16 then switches off the electric fuel pump 2 via the relay 14. The electric fuel pump 2 is also switched on via the relay 14
  • FIG. 3 shows a third embodiment of a fuel supply system according to the invention.
  • the basic structure of this embodiment is the same as in the previously described embodiments and will not be described again to avoid repetition. For the sake of simplicity, the same parts are provided with the same reference symbols.
  • the electric fuel pump 2 in the embodiment shown in FIG. 3 is controlled directly by the control device 16 via lines 30 and 31.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention relates to a fuel supply device for supplying fuel to an internal combustion engine, wherein said device comprises an electric fuel pump (2) which is supplied by an electric circuit (20) and which is used for conveying the fuel from a fuel tank (1) to a fuel accumulator (3). This device also includes a control device (16) which opens the electric circuit (20) of the electric fuel pump (2) when the fuel accumulator (3) is full and which closes said circuit when the fuel accumulator (3) is empty. In such fuel supply systems, the amount of fuel in the fuel accumulator can be measured, for example, using an expensive and failure-subject level indicator. The purpose of this invention is to provide a fuel supply system which can be manufactured at low cost and operates without any malfunction. To this end, the control device (16) calculates the increasing outflow of the fuel accumulator (3) from the fuel consumption of the internal combustion engine, and actuates the electric fuel pump (2) when the fuel level in the fuel accumulator (3) reaches a predetermined set point.

Description

Kraftstoffversorguήgsanlage zum Zuliefern von Kraftstoff für eine Brenn raftmaschineFuel supply system for supplying fuel for an internal combustion engine
Stand der TechnikState of the art
Die Erfindung betrifft eine Kraftstoffversorgungsanlage zum Zuliefern von Kraftstoff für eine Brennkraftmaschine, mit einer Elektrokraftstoffpumpe, die über einen Stromkreis mit Strom versorgt wird, um Kraftstoff aus einem Kraftstofftank in einen KraftstoffSpeicher zu fördern, und mit einer Steuereinrichtung, welche dafür sorgt, daß der Stromkreis der Elektrokraftstoffpumpe unterbrochen wird, wenn derThe invention relates to a fuel supply system for supplying fuel for an internal combustion engine, with an electric fuel pump, which is supplied with current via a circuit to convey fuel from a fuel tank into a fuel storage device, and with a control device which ensures that the circuit of the Electric fuel pump is interrupted when the
KraftstoffSpeicher voll ist, und geschlossen wird, wenn der KraftstoffSpeicher leer ist .Fuel storage is full and is closed when the fuel storage is empty.
Bei einer derartigen Kraftstoffversorgungsanlage, wie sie beispielsweise in der nicht vorveröffentlichten DE-PIn such a fuel supply system, as for example in the unpublished DE-P
19710299.9 beschrieben ist, erfolgt die Erfassung der in dem KraftstoffSpeicher enthaltenen Kraftstoffmenge durch einen Füllstandsgeber. Ein solcher Füllstandsgeber verursacht jedoch zusätzliche Kosten und ist bei einer hohen Füllfrequenz des KraftstoffSpeichers störanfällig.19710299.9, the amount of fuel contained in the fuel accumulator is recorded by a level sensor. However, such a fill level sensor causes additional costs and is prone to failure if the fuel accumulator is filled at a high frequency.
Der Erfindung liegt daher das Problem zugrunde, eine Kraftstoffversorgungsanlage bereitzustellen, die kostengünstig hergestellt werden kann und auch bei einer hohen Füllfrequenz des KraftstoffSpeichers störungsfrei arbeitet . Das Problem ist bei einer Kraftstoffversorgungsanlage zum Zuliefern von Kraftstoff für eine Brennkraftmaschine, mit einer Elektrokraftstoffpumpe, die über einen Stromkreis mit Strom versorgt wird, um Kraftstoff aus einem Kraftstofftank in einen KraftstoffSpeicher zu fördern, und mit einerThe invention is therefore based on the problem of providing a fuel supply system which can be produced inexpensively and which operates without problems even at a high filling frequency of the fuel accumulator. The problem is with a fuel supply system for supplying fuel to an internal combustion engine, with an electric fuel pump that is supplied with current via a circuit to deliver fuel from a fuel tank into a fuel accumulator, and with one
Steuereinrichtung, die dafür sorgt, daß der Stromkreis der Elektrokraftstoffpumpe unterbrochen wird, wenn der KraftstoffSpeicher voll ist, und geschlossen wird, wenn der KraftstoffSpeicher leer ist, dadurch gelöst, daß die Steuereinrichtung so ausgebildet ist, daß sie die zunehmende Entleerung des KraftstoffSpeichers aus dem Kraftstoffverbrauch der Brennkraftmaschine berechnet und dafür sorgt, daß die Elektrokraftstoffpumpe eingeschaltet wird, wenn das Kraftstoffniveau in dem KraftstoffSpeicher einen wählbaren Sollwert erreicht. Dabei kann als Sollwert ein beliebiger Wert gewählt werden, der zwischen dem maximalen und dem minimalen Volumen des KraftstoffSpeichers liegt. Dadurch ist es möglich, daß bei der Steuerung der Elektrokraftstoffpumpe auch weitere Signale berücksichtigt werden, die in Form eines Kennfeldes vorliegen können. Als weitere Signale bieten sich z.B. an:Control device which ensures that the circuit of the electric fuel pump is interrupted when the fuel accumulator is full and is closed when the fuel accumulator is empty, in that the control device is designed so that it the increasing emptying of the fuel accumulator from the fuel consumption calculates the internal combustion engine and ensures that the electric fuel pump is switched on when the fuel level in the fuel storage reaches a selectable setpoint. Any desired value can be selected as the setpoint, which lies between the maximum and the minimum volume of the fuel accumulator. This makes it possible for other signals, which may be in the form of a characteristic diagram, to be taken into account when controlling the electric fuel pump. Further signals are e.g. on:
das Kraftstoffniveau in dem Kraftstofftankthe fuel level in the fuel tank
- die Fahrstufenregelung eines Automatikgetriebes bzw. einer elektronischen Motorleistungssteuerung- The speed control of an automatic transmission or an electronic engine power control
die aktuelle Fahrweisethe current driving style
- der Brennwert des verwendeten Kraftstoffs- the calorific value of the fuel used
das Ausgasungsverhalten des Kraftstoffs.the outgassing behavior of the fuel.
Zu dem letzten Beispiel sei angemerkt, daß es sinnvoll ist, bei einem für die Elektrokraftstoffpumpe kritischenRegarding the last example, it should be noted that it makes sense to use one that is critical for the electric fuel pump
Kraftstoff den Sollwert zu erhöhen, um Heißbenzineinbrüche der Elektrokraftstoffpumpe zu kompensieren.Fuel to increase the setpoint to reduce hot gasoline slumps to compensate for the electric fuel pump.
Eine besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, daß in dem Stromkreis ein Schalter vorgesehen ist, der, wenn der KraftstoffSpeicher voll ist, den Stromkreis der Elektrokraftstoffpumpe unterbricht oder ein entsprechendes Signal an die Steuereinrichtung abgibt. Dadurch ist es möglich, die Elektrokraftstoffpumpe durch eine einseitige Direktabschaltung genau dann abzuschalten, wenn der KraftstoffSpeicher zu 100% mit Kraftstoff befüllt ist. Der Schalter kann mechanisch oder berührungslos arbeiten, um die vollständige Füllung desA special embodiment of the invention is characterized in that a switch is provided in the circuit which, when the fuel reservoir is full, interrupts the circuit of the electric fuel pump or emits a corresponding signal to the control device. This makes it possible to switch off the electric fuel pump by means of a one-sided direct switch-off when the fuel accumulator is 100% full of fuel. The switch can work mechanically or contactless to ensure the full filling of the
KraftstoffSpeichers zu erfassen. Wenn der Schalter mit der Steuereinrichtung gekoppelt ist, hat das den Vorteil, daß dann kein Leistungsschalter in dem KraftstoffSpeicher angebracht werden muß.Detect fuel storage. If the switch is coupled to the control device, this has the advantage that no circuit breaker then has to be fitted in the fuel accumulator.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, daß in dem Stromkreis ein mit der Steuereinrichtung gekoppeltes Relais mit zweiAnother special embodiment of the invention is characterized in that in the circuit a relay coupled to the control device with two
Schaltstellungen vorgesehen ist, wobei der Stromkreis in der einen Schaltstellung geöffnet und in der anderen Schaltstellung geschlossen ist. Wenn der vorab erwähnte Schalter das Signal an die Steuereinrichtung abgibt, daß der KraftstoffSpeicher voll ist, wird der Stromkreis der Elektrokraftstoffpumpe durch das Relais unterbrochen. Darüber hinaus können sämtliche weiteren Signale in der Steuereinrichtung verarbeitet und über das Relais bei der Steuerung der Elektrokraftstoffpumpe berücksichtigt werden.Switch positions are provided, the circuit being open in one switching position and closed in the other switching position. When the aforementioned switch outputs the signal to the control device that the fuel accumulator is full, the circuit of the electric fuel pump is interrupted by the relay. In addition, all other signals can be processed in the control device and taken into account via the relay when controlling the electric fuel pump.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, daß das Relais öffnet, wenn der Stromkreis unterbrochen wurde, und schließt, wenn die Steuereinrichtung die Entleerung des KraftstoffSpeichers unter einen vorgegebenen Sollwert aus demAnother special embodiment of the invention is characterized in that the relay opens when the circuit has been interrupted and closes when the control device empties the fuel accumulator below a predetermined setpoint from the
Kraftstoffverbrauch der Brennkraftmaschine feststellt. Das bedeutet, daß das Relais im stromlosen Kreis öffnet. Daraufhin kann der Schalter ebenfalls stromlos geschlossen werden. Wenn zu wenig Kraftstoff im KraftstoffSpeicher enthalten ist, wird der Stromkreis durch das Relais wieder geschlossen. Das hat den Vorteil, daß die Verschleiß verursachenden Schaltungen auf den Schalter und das Relais verteilt werden.Determines fuel consumption of the internal combustion engine. The means that the relay opens in the de-energized circuit. The switch can then also be closed when de-energized. If there is too little fuel in the fuel tank, the circuit is closed again by the relay. This has the advantage that the circuits causing wear are distributed to the switch and the relay.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnungen drei Ausführungsbeispiele im Einzelnen beschrieben sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention emerge from the subclaims and the following description, in which three exemplary embodiments are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination.
Die Figuren 1 bis 3 zeigen drei unterschiedliche Ausführungsarten einer Kraftstoffversorgungsanlage gemäß der vorliegenden Erfindung.Figures 1 to 3 show three different embodiments of a fuel supply system according to the present invention.
Die in Figur 1 schematisch dargestellteThe schematically shown in Figure 1
KraftstoffVersorgungsanlage umfaßt einen Kraftstofftank 1, aus dem eine Elektrokraftstoffpumpe 2 Kraftstoff ansaugt. Die Elektrokraftstoffpumpe 2 fördert den angesaugten Kraftstoff in einen KraftstoffSpeicher 3, der die Elektrokraftstoffpumpe 2 umgibt. Der KraftstoffSpeicher 3 umfaßt eine Membran 4, gegen die eine Feder 5 vorgespannt ist. Die Membran 4 ist in Abhängigkeit von der in dem KraftstoffSpeicher 3 enthaltenen Kraftstoffmenge hin- und herbewegbar, wie es durch den Doppelpfeil 6 angedeutet ist. Der aus dem Kraftstofftank 1 angesaugte Kraftstoff gelangt über eine Leitung 7 von dem KraftstoffSpeicher 3 oder direkt von der Elektrokraftstoffpumpe 2 zu (nicht dargestellten) Einspritzventilen. An dem KraftstoffSpeicher 3 ist ein Ein-Aus-Schalter 8 angebracht. Der Schalter 8 wird durch ein Stellelement 9 betätigt, das starr mit der sich hin- und herbewegenden Membran 4 verbunden ist .Fuel supply system comprises a fuel tank 1, from which an electric fuel pump 2 draws fuel. The electric fuel pump 2 conveys the drawn-in fuel into a fuel accumulator 3, which surrounds the electric fuel pump 2. The fuel accumulator 3 comprises a membrane 4 against which a spring 5 is biased. The membrane 4 can be moved back and forth depending on the amount of fuel contained in the fuel accumulator 3, as indicated by the double arrow 6. The fuel drawn from the fuel tank 1 reaches the injection valves (not shown) via a line 7 from the fuel accumulator 3 or directly from the electric fuel pump 2. An on-off switch 8 is attached to the fuel accumulator 3. The switch 8 is actuated by an actuator 9 which is rigidly connected to the reciprocating membrane 4.
Die Elektrokraftstoffpumpe 2 ist über einen Stromkreis 20, der zwei Stromleitungen 10 und 11 umfaßt, mit einer Stromversorgungseinheit verbunden, die bei 13 durch Plus und Minus angedeutet ist. In der Stromleitung 11 ist der Ein-Aus-Schalter 8 und eine Relais 14 vorgesehen. Das Relais 14 ist über eine Steuerleitung 15 mit einer Steuereinrichtung 16 verbunden.The electric fuel pump 2 is connected via a circuit 20, which comprises two power lines 10 and 11, to a power supply unit, which is indicated at 13 by plus and minus. The on-off switch 8 and a relay 14 are provided in the power line 11. The relay 14 is connected to a control device 16 via a control line 15.
Die in Figur 1 dargestellte Schaltung funktioniert wie folgt. Wenn der KraftstoffSpeicher voll ist, kommt das Stellelement 9 gegen den Schalter 8 in Anschlag und betätigt diesen. Durch die Betätigung des Schalters 8 wird der Stromkreis 20 unterbrochen. Diese Unterbrechung des Stromkreises wird von der Steuereinrichtung 16 registriert. Daraufhin sorgt die Steuereinrichtung 16 dafür, daß das Relais 14 in dem stromlosen Stromkreis 20 öffnet. Der Schalter 8 schließt nach Abheben des Kontaktes 9 wieder in den geschlossenen Zustand. Somit befindet sich der Schalter 8 wieder in seinem Ausgangszustand, wobei der Stromkreis 20 immer noch unterbrochen ist.The circuit shown in Figure 1 works as follows. When the fuel accumulator is full, the actuating element 9 comes to a stop against the switch 8 and actuates it. The circuit 20 is interrupted by the actuation of the switch 8. This interruption of the circuit is registered by the control device 16. The control device 16 then ensures that the relay 14 in the currentless circuit 20 opens. The switch 8 closes after the contact 9 is lifted back into the closed state. The switch 8 is thus again in its initial state, the circuit 20 still being interrupted.
In die Steuereinrichtung 16 werden, wie durch die Pfeile 21 angedeutet ist, verschiedene Werte und/oder Signale eingegeben. Dabei kann es sich beispielsweise um das aktuelle Kraftstoffniveau im Kraftstofftank 1 handeln, das durch einen entsprechenden Sensor erfaßt wird. In der Steuereinrichtung 16 wird der Füllstand in dem KraftstoffSpeicher 3 aus der Differenz zwischen der maximalen Kraftstoffmenge, die der KraftstoffSpeicher 3 aufnehmen kann, und der Kraftstoffmenge berechnet, die aus dem Kraftstofftank an die Brennkraftmaschine geliefert wird. Die Steuereinrichtung erkennt somit, wenn in dem KraftstoffSpeicher 3 ein bestimmter Sollwert unterschritten wird. In einem solchen Fall wird das Relais 14 geschlossen, so daß der Stromkreis 20 geschlossen ist und die Elektrokraftstoffpumpe 2 Kraftstoff in denAs indicated by the arrows 21, various values and / or signals are input into the control device 16. This can be, for example, the current fuel level in the fuel tank 1, which is detected by a corresponding sensor. In the control device 16, the fill level in the fuel accumulator 3 is calculated from the difference between the maximum quantity of fuel that the fuel accumulator 3 can hold and the quantity of fuel that is supplied to the internal combustion engine from the fuel tank becomes. The control device thus recognizes when the fuel storage 3 falls below a certain target value. In such a case, the relay 14 is closed, so that the circuit 20 is closed and the electric fuel pump 2 fuel in the
KraftstoffSpeicher 3 fördert. Wenn der KraftstoffSpeicher 3 voll ist, beginnt der Zyklus wieder von vorne.Fuel storage 3 promotes. When the fuel storage 3 is full, the cycle starts again.
In Figur 2 ist eine zweite Ausführungsform einer erfindungsgemäßen Kraftstoffversorgungsanlage gezeigt. Der prinzipielle Aufbau dieser Ausführungsform ist der gleiche wie bei der vorab beschriebenen Ausführungsform und wird, um Wiederholungen zu vermeiden, nicht noch einmal beschrieben. Der Einfachheit halber sind gleiche Teile mit gleichen Bezugszeichen versehen.FIG. 2 shows a second embodiment of a fuel supply system according to the invention. The basic structure of this embodiment is the same as that of the previously described embodiment and will not be described again to avoid repetition. For the sake of simplicity, the same parts are provided with the same reference symbols.
Im Unterschied zu der in Figur 1 dargestelltenIn contrast to that shown in Figure 1
Ausführungsform ist der Schalter 8 bei der in Figur 2 dargestellten Ausführungs orm nicht in dem Stromkreis 20 der Elektrokraftstoffpumpe angebracht. Der Schalter 8 ist, wie in Figur 2 durch eine Leitung 22 angedeutet ist, mit der Steuereinrichtung 16 gekoppelt. Dabei kann der Schalter 8 entweder als Ein-Aus-Schalter oder als Näherungsschalter ausgebildet sein.Embodiment, the switch 8 in the embodiment shown in Figure 2 is not attached in the circuit 20 of the electric fuel pump. As indicated in FIG. 2 by a line 22, the switch 8 is coupled to the control device 16. The switch 8 can be designed either as an on-off switch or as a proximity switch.
Die in Figur 2 dargestellte Schaltung funktioniert wie folgt. Wenn der KraftstoffSpeicher 3 voll ist, gibt der Schalter 8 ein entsprechendes Signal an die Steuereinrichtung 16 ab. Daraufhin schaltet die Steuereinrichtung 16 die Elektrokraftstoffpumpe 2 über das Relais 14 ab. Das Einschalten der Elektrokraftstoffpumpe 2 erfolgt ebenfalls über das Relais 14. DerThe circuit shown in Figure 2 works as follows. When the fuel accumulator 3 is full, the switch 8 emits a corresponding signal to the control device 16. The control device 16 then switches off the electric fuel pump 2 via the relay 14. The electric fuel pump 2 is also switched on via the relay 14
Einschaltzeitpunkt der Elektrokraftstoffpumpe 2 hängt dabei von dem frei wählbaren Sollwert für den Füllstand in dem KraftstoffSpeicher 3 ab. In Figur 3 ist eine dritte Ausführungsform einer erfindungsgemäßen Kraftstoffversorgungsanlage gezeigt. Der prinzipielle Aufbau dieser Ausführungsform ist der gleiche wie bei den vorab beschriebenen Ausführungsformen und wird, um Wiederholungen zu vermeiden, nicht noch einmal beschrieben. Der Einfachheit halber sind gleiche Teile mit gleichen Bezugszeichen versehen.The time at which the electric fuel pump 2 is switched on depends on the freely selectable setpoint for the fill level in the fuel accumulator 3. FIG. 3 shows a third embodiment of a fuel supply system according to the invention. The basic structure of this embodiment is the same as in the previously described embodiments and will not be described again to avoid repetition. For the sake of simplicity, the same parts are provided with the same reference symbols.
Im Unterschied zu der in Figur 2 dargestellten Ausführungsform wird die Elektrokraftstoffpumpe 2 bei der in Figur 3 dargestellten Ausführungsform über Leitungen 30 und 31 direkt von der Steuereinrichtung 16 angesteuert.In contrast to the embodiment shown in FIG. 2, the electric fuel pump 2 in the embodiment shown in FIG. 3 is controlled directly by the control device 16 via lines 30 and 31.
Dadurch ist der Hardwareaufwand bei dieser Ausführungsform minimal . As a result, the hardware expenditure in this embodiment is minimal.

Claims

Ansprüche Expectations
1. Kraftstoffversorgungsanlage zum Zuliefern von Kraftstoff für eine Brennkraftmaschine, mit einer1. Fuel supply system for supplying fuel for an internal combustion engine, with one
Elektrokraftstoffpumpe (2) , die über einen Stromkreis (20) mit Strom versorgt wird, um Kraftstoff aus einem Kraftstofftank (1) in einen KraftstoffSpeicher (3) zu fördern, und mit einer Steuereinrichtung (16) , die dafür sorgt, daß der Stromkreis (20) derElectric fuel pump (2), which is supplied with current via a circuit (20) in order to convey fuel from a fuel tank (1) into a fuel storage device (3), and with a control device (16) which ensures that the circuit ( 20) the
Elektrokraftstoffpumpe (2) unterbrochen wird, wenn der KraftstoffSpeicher (3) voll ist, und geschlossen wird, wenn der KraftstoffSpeicher (3) leer ist,Electric fuel pump (2) is interrupted when the fuel accumulator (3) is full, and is closed when the fuel accumulator (3) is empty,
dadurch gekennzeichnet,characterized,
daß die Steuereinrichtung (16) so ausgebildet ist, daß sie die zunehmende Entleerung des KraftstoffSpeichers (3) aus dem Kraftstoffverbrauch der Brennkraftmaschine berechnet und dafür sorgt, daß diethat the control device (16) is designed such that it calculates the increasing emptying of the fuel accumulator (3) from the fuel consumption of the internal combustion engine and ensures that the
Elektrokraftstoffpumpe (2) eingeschaltet wird, wenn das Kraftstoffniveau in dem KraftstoffSpeicher (3) einen wählbaren Sollwert erreicht.Electric fuel pump (2) is switched on when the fuel level in the fuel storage (3) reaches a selectable setpoint.
2. KraftstoffVersorgungsanlage nach Anspruch 1, dadurch gekennzeichnet, daß in dem Stromkreis (20) ein Schalter (8) vorgesehen ist, der, wenn der KraftstoffSpeicher (3) voll ist, den Stromkreis (20) der Elektrokraftstoffpumpe (2) unterbricht oder ein entsprechendes Signal an die Steuereinrichtung (16) abgibt . 2. Fuel supply system according to claim 1, characterized in that in the circuit (20) a switch (8) is provided which, when the fuel accumulator (3) is full, interrupts the circuit (20) of the electric fuel pump (2) or a corresponding one Outputs signal to the control device (16).
3. Kraftstoffversorgungsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in dem Stromkreis (20) ein mit der Steuereinrichtung (16) gekoppeltes Relais (14) mit zwei Schaltstellungen vorgesehen ist, wobei der Stromkreis (20) in der einen3. Fuel supply system according to one of the preceding claims, characterized in that in the circuit (20) with the control device (16) coupled relay (14) is provided with two switching positions, the circuit (20) in one
Schaltstellung geöffnet und in der anderen Schaltstellung geschlossen ist.Switch position is open and closed in the other switch position.
4. Kraftstoffversorgungsanlage nach Anspruch 3, dadurch gekennzeichnet, daß das Relais (14) öffnet, wenn der4. Fuel supply system according to claim 3, characterized in that the relay (14) opens when the
Stromkreis (20) unterbrochen wurde, und schließt, wenn die Steuereinrichtung (16) die Entleerung des KraftstoffSpeichers (3) unter einen vorgegebenen Sollwert aus dem Kraftstoffverbrauch der Brennkraftmaschine feststellt. Circuit (20) was interrupted, and closes when the control device (16) determines the emptying of the fuel accumulator (3) below a predetermined target value from the fuel consumption of the internal combustion engine.
EP98966151A 1998-02-17 1998-11-18 Fuel supply device for supplying fuel to an internal combustion engine Expired - Lifetime EP1002194B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19806415A DE19806415A1 (en) 1998-02-17 1998-02-17 Fuel supply system for delivery of fuel to internal combustion engine
DE19806415 1998-02-17
PCT/DE1998/003401 WO1999042720A1 (en) 1998-02-17 1998-11-18 Fuel supply device for supplying fuel to an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1002194A1 true EP1002194A1 (en) 2000-05-24
EP1002194B1 EP1002194B1 (en) 2003-03-12

Family

ID=7857929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966151A Expired - Lifetime EP1002194B1 (en) 1998-02-17 1998-11-18 Fuel supply device for supplying fuel to an internal combustion engine

Country Status (5)

Country Link
EP (1) EP1002194B1 (en)
JP (1) JP2001520724A (en)
KR (1) KR20010006256A (en)
DE (2) DE19806415A1 (en)
WO (1) WO1999042720A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936243B (en) * 2010-09-02 2012-02-29 浙江科博达工业有限公司 Device for automatically emptying fuel oil in low-pressure oil circuit of diesel engine
JP6162078B2 (en) 2014-06-17 2017-07-12 愛三工業株式会社 Fuel supply device
DE102015015191A1 (en) 2015-11-24 2017-05-24 Daimler Ag A method of determining a quantity of fuel received in a fuel tank of a motor vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4920942A (en) * 1987-04-24 1990-05-01 Diesel Kiki Co., Ltd. Method and apparatus for supplying fuel to internal combustion engines
RU2104407C1 (en) * 1991-05-15 1998-02-10 Орбитал Энджин Компани (Аустралиа) ПТИ Лимитед Method of control of operation of fuel system and fuel system for internal combustion engine
DE4313852B4 (en) * 1993-04-28 2004-11-25 Robert Bosch Gmbh Fuel injection device for internal combustion engines
DE19710299A1 (en) * 1996-06-27 1998-01-02 Bosch Gmbh Robert Fuel-feed device for motor vehicle fuel-injection system

Non-Patent Citations (1)

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Title
See references of WO9942720A1 *

Also Published As

Publication number Publication date
KR20010006256A (en) 2001-01-26
WO1999042720A1 (en) 1999-08-26
DE19806415A1 (en) 1999-08-19
JP2001520724A (en) 2001-10-30
DE59807480D1 (en) 2003-04-17
EP1002194B1 (en) 2003-03-12

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