EP1440232A1 - Device for control of an electric fuel pump - Google Patents

Device for control of an electric fuel pump

Info

Publication number
EP1440232A1
EP1440232A1 EP02774453A EP02774453A EP1440232A1 EP 1440232 A1 EP1440232 A1 EP 1440232A1 EP 02774453 A EP02774453 A EP 02774453A EP 02774453 A EP02774453 A EP 02774453A EP 1440232 A1 EP1440232 A1 EP 1440232A1
Authority
EP
European Patent Office
Prior art keywords
fuel pump
fuel
electronic control
control
power supply
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.)
Withdrawn
Application number
EP02774453A
Other languages
German (de)
French (fr)
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.)
Siemens AG
Original Assignee
Siemens 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 AG filed Critical Siemens AG
Publication of EP1440232A1 publication Critical patent/EP1440232A1/en
Withdrawn legal-status Critical Current

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
    • F02D41/3082—Control of electrical fuel pumps
    • 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
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • 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
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/406—Electrically controlling a diesel injection pump
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a device for controlling an electric fuel pump for a motor vehicle with an electronic control arranged between a power supply and the fuel pump for regulating the power of the fuel pump and with a pressure sensor for monitoring a pressure generated by the fuel pump.
  • Such devices are used in today's motor vehicles and are known from practice.
  • the fuel pump can be regulated depending on the need of the internal combustion engine of the motor vehicle.
  • the internal combustion engine therefore receives only the amount of fuel that it requires from the fuel pump.
  • An unnecessary circulation and heating of fuel in the fuel tank is avoided with the known device. This means that the fuel tank has a low permeation of fuel.
  • a disadvantage of the known device is that in the event of a failure of the electronic control, the fuel pump is no longer activated and the fuel is therefore not delivered.
  • the invention is based on the problem of developing a device of the known type such that if the electronic control fails, the fuel pump can continue to operate at least temporarily.
  • the electronic control is connected to a monitoring device and that means are provided for connecting the fuel pump to the power supply in the event of a fault in the electronic control.
  • This design ensures that the fuel pump is supplied with power even when the electronic control malfunctions. The fuel pump is therefore still operated despite the malfunction. Therefore, a failure of the supply of the internal combustion engine with fuel is reliably avoided in the event of a defect in the electronic control.
  • the monitoring device can be, for example, a so-called watch dog.
  • a supply of fuel to the internal combustion engine can be ensured according to an advantageous development of the invention if the electronic control or the monitoring device has means for unregulated connection of the fuel pump to the power supply in the event of a fault in the pressure sensor.
  • connection of the fuel umpe to the power grid could, for example, have a backup controller.
  • the device according to the invention is particularly simple if the connection to the power grid is unregulated.
  • the device according to the invention is structurally particularly simple if the fuel pump has a switch, if the switch can be controlled by the monitoring device and is designed to connect the fuel pump in one position to the electronic control and in the other position to the power supply system.
  • Switching from the regulated control of the fuel pump to the uncontrolled control requires, according to another advantageous development of the invention, a particularly low construction effort if the switch has a relay.
  • Two fuel pumps are often used in particularly powerful internal combustion engines.
  • the regulation of According to another advantageous development of the invention, the performance of a plurality of fuel pumps requires particularly little effort if a single electronic control is designed to control a plurality of fuel pumps.
  • the unregulated connection of the fuel pump could, for example, have a fixed resistance and enable the fuel pump to operate in the partial load range.
  • the device according to the invention enables permanent operation of the fuel pump at full load if the fuel pump is connected to a mechanical pressure regulator. As a result of this design, the fuel pump is operated in the unregulated connection to the power supply like the known fuel pump without electronic control.
  • the device according to the invention has a particularly high level of reliability if each of the fuel pumps has its own switch.
  • checking the functionality of the electronic control requires particularly little effort if the monitoring device and the control unit of the internal combustion engine have a common connection for a diagnostic device.
  • the electronic control, the pressure regulator and the monitoring device can easily be tested with the control unit of the internal combustion engine, which is to be checked regularly.
  • the invention permits numerous embodiments. To further clarify its basic principle, one of these is shown in the drawing and is described below.
  • this shows schematically a device according to the invention for regulating the power of two Fuel pumps 1, 2.
  • the device has an electronic control 3 and a monitoring device 4.
  • the electronic control 3 is connected to a control unit 5 of an internal combustion engine of the motor vehicle and to a pressure sensor 7 arranged in an injection bar 6.
  • the electronic control 3 can regulate the output of the fuel pumps 1, 2 as a function of the signals from the control unit 5 and the pressure prevailing in the injection bar 6.
  • a signal generated by the electronic control 3 is checked by the monitoring device 4.
  • the monitoring device 4 is connected to a relay 8.
  • the relay 8 controls two switches 9, 10, which establish the connection of the fuel pumps 1, 2 either with the power supply marked V + and ground in the drawing or with the electronic control 3.
  • the electronic control 3 has a controller 11, a pulse width modulation 12 and two control units 13, 14.
  • the control units 13, 14 are each assigned to a fuel pump 1, 2.
  • the control unit 5 of the internal combustion engine and the monitoring device 4 are connected to a common diagnostic connection 15.
  • the control signals of the monitoring device 4 are also transmitted to the relay 8 via the line 16 leading to the diagnostic connection 15.
  • a failure of the electronic control 3 is detected by the monitoring device 4. If the electronic control 3 fails, the monitoring device 4 controls the relay 8, which then switches over the connection of the fuel pumps 1, 2 from the electronic control 3 to the power supply. As a result, the fuel pumps 1, 2 are operated at full power without control.
  • the pressure generated by the fuel pumps 1, 2 is limited by a mechanical pressure regulator 17 to, for example, 6 bar. Excess fuel is fed into the Fuel tank returned. If the fuel pumps 1, 2 are controlled by the electronic control 3, the pressure generated in the injection bar 6 is generally kept below 6 bar, so that the mechanical pressure regulator 17 closes the shutoff line 18 at all times.

Landscapes

  • 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)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a device for control of an electric fuel pump (1, 2) on a motor vehicle, whereby, on a fault in an electronic controller (3), the fuel pump (1, 2) is connected to the voltage supply of the vehicle. The fuel pump (1, 2) then pumps at full capacity. Said device offers a high security against a break in the supply of fuel.

Description

Beschreibungdescription
Einrichtung zur Ansteuerung einer elektrischen KraftstoffpumpeDevice for controlling an electric fuel pump
Die Erfindung betrifft eine Einrichtung zur Ansteuerung einer elektrischen Kraftstoffpumpe für ein Kraftfahrzeug mit einer zwischen einem Stromnetz und der Kraftstoffpumpe angeordneten elektronischen Steuerung zur Regelung der Leistung der Kraftstoffpumpe und mit einem Drucksensor zur Überwachung eines von der Kraftstoffpumpe erzeugten Drucks.The invention relates to a device for controlling an electric fuel pump for a motor vehicle with an electronic control arranged between a power supply and the fuel pump for regulating the power of the fuel pump and with a pressure sensor for monitoring a pressure generated by the fuel pump.
Solche Einrichtungen werden in heutigen Kraftfahrzeugen eingesetzt und sind aus der Praxis bekannt. Hierdurch lässt sich die Kraftstoffpumpe in Abhängigkeit des Bedarfs der Brennkraftmaschine des Kraftfahrzeuges regeln. Die Brennkraftmaschine erhält daher von der Kraftstoffpumpe nur die Menge an Kraftstoff, die sie benötigt. Eine unnötige Umwälzung und Aufheizung von Kraftstoff im Kraftstoffbehälter wird mit der bekannten Einrichtung vermieden. Damit hat der Kraftstoffbehälter eine geringe Permeation an Kraftstoff.Such devices are used in today's motor vehicles and are known from practice. As a result, the fuel pump can be regulated depending on the need of the internal combustion engine of the motor vehicle. The internal combustion engine therefore receives only the amount of fuel that it requires from the fuel pump. An unnecessary circulation and heating of fuel in the fuel tank is avoided with the known device. This means that the fuel tank has a low permeation of fuel.
Nachteilig bei der bekannten Einrichtung ist, dass bei einem Ausfall der elektronischen Steuerung die Kraftstoffpumpe nicht mehr angesteuert wird und damit eine Förderung des Kraftstoffs ausbleibt.A disadvantage of the known device is that in the event of a failure of the electronic control, the fuel pump is no longer activated and the fuel is therefore not delivered.
Der Erfindung liegt das Problem zugrunde, eine Einrichtung der bekannten Art so weiterzubilden, dass bei einem Ausfall der elektronischen Steuerung ein zumindest vorübergehender Weiterbetrieb der Kraftstoffpumpe möglich ist.The invention is based on the problem of developing a device of the known type such that if the electronic control fails, the fuel pump can continue to operate at least temporarily.
Dieses Problem wird erfindungsgemäß dadurch gelöst, dass die elektronische Steuerung mit einer Überwachungseinrichtung verbunden ist und dass Mittel zur Verbindung der Kraftstoffpumpe mit dem Stromnetz bei einer Störung der elektronischen Steuerung vorgesehen sind. Durch diese Gestaltung wird eine Stromversorgung der Kraftstoffpumpe auch bei der Störung der elektronischen Steuerung sichergestellt. Die Kraftstoffpumpe wird daher trotz der Störung weiterbetrieben. Daher wird bei einem Defekt der elektronischen Steuerung ein Ausfall der Versorgung der Brennkraftmaschine mit Kraftstoff zuverlässig vermieden. Bei der Überwachungseinrichtung kann es sich beispielsweise um einen sogenannten Watch-Dog handeln.This problem is solved according to the invention in that the electronic control is connected to a monitoring device and that means are provided for connecting the fuel pump to the power supply in the event of a fault in the electronic control. This design ensures that the fuel pump is supplied with power even when the electronic control malfunctions. The fuel pump is therefore still operated despite the malfunction. Therefore, a failure of the supply of the internal combustion engine with fuel is reliably avoided in the event of a defect in the electronic control. The monitoring device can be, for example, a so-called watch dog.
Bei einem Ausfall des Drucksensors lässt sich gemäß einer vorteilhaften Weiterbildung der Erfindung eine Versorgung der Brennkraftmaschine mit Kraftstoff sicherstellen, wenn die elektronische Steuerung oder die Überwachungseinrichtung Mittel zur ungeregelten Verbindung der Kraftstoffpumpe mit dem Stromnetz bei einer Störung des Drucksensors aufweist.In the event of a failure of the pressure sensor, a supply of fuel to the internal combustion engine can be ensured according to an advantageous development of the invention if the electronic control or the monitoring device has means for unregulated connection of the fuel pump to the power supply in the event of a fault in the pressure sensor.
Die Verbindung der Kraftstoff umpe mit dem Stromnetz könnte beispielsweise eine Ersatzsteuerung aufweisen. Die erfindungsgemäße Einrichtung ist jedoch besonders einfach aufgebaut, wenn die Verbindung mit dem Stromnetz ungeregelt ist.The connection of the fuel umpe to the power grid could, for example, have a backup controller. However, the device according to the invention is particularly simple if the connection to the power grid is unregulated.
Die erfindungsgemäße Einrichtung gestaltet sich konstruktiv besonders einfach, wenn die Kraftstoffpumpe einen Schalter aufweist, wenn der Schalter von der Überwachungseinrichtung ansteuerbar ist und zur Verbindung der Kraftstoffpumpe in der einen Stellung mit der elektronischen Steuerung und in der anderen Stellung mit dem Stromnetz ausgebildet ist.The device according to the invention is structurally particularly simple if the fuel pump has a switch, if the switch can be controlled by the monitoring device and is designed to connect the fuel pump in one position to the electronic control and in the other position to the power supply system.
Die Umschaltung von der geregelten Steuerung der Kraftstoffpumpe in die ungeregelte Steuerung erfordert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen baulichen Aufwand, wenn der Schalter ein Relais aufweist .Switching from the regulated control of the fuel pump to the uncontrolled control requires, according to another advantageous development of the invention, a particularly low construction effort if the switch has a relay.
Bei besonders leistungsstarken Brennkraftmaschinen werden häufig zwei Kraftstoffpumpen eingesetzt. Die Regelung der Leistung mehrerer Kraftstoffpumpen erfordert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen Aufwand, wenn eine einzige elektronische Steuerung zur Ansteuerung mehrerer Kraftstoffpumpen ausgebildet ist .Two fuel pumps are often used in particularly powerful internal combustion engines. The regulation of According to another advantageous development of the invention, the performance of a plurality of fuel pumps requires particularly little effort if a single electronic control is designed to control a plurality of fuel pumps.
Die ungeregelte Verbindung der Kraf stoffpumpe könnte beispielsweise einen festen Widerstand aufweisen und den Betrieb der Kraftstoffpumpe im Teillastbereich ermöglichen. Die erfindungsgemäße Einrichtung ermöglicht einen dauerhaften Betrieb der Kraftstoffpumpe bei Volllast, wenn die Kraftstoffpumpe mit einem mechanischen Druckregler verbunden ist . Durch diese Gestaltung wird die Kraftstoffpumpe bei der ungeregelten Verbindung mit dem Stromnetz wie die bekannte Kraftstoffpumpe ohne elektronische Steuerung betrieben.The unregulated connection of the fuel pump could, for example, have a fixed resistance and enable the fuel pump to operate in the partial load range. The device according to the invention enables permanent operation of the fuel pump at full load if the fuel pump is connected to a mechanical pressure regulator. As a result of this design, the fuel pump is operated in the unregulated connection to the power supply like the known fuel pump without electronic control.
Bei mehreren Kraftstoffpumpen könnte ein einzelner Schalter die Verbindung mit dem Stromnetz oder der elektronischen Steuerung herstellen. Die erfindungsgemäße Einrichtung hat jedoch eine besonders hohe Ausfallsicherheit, wenn jede der Kraftstoffpumpen einen eigenen Schalter hat.With multiple fuel pumps, a single switch could connect to the power grid or electronic control. However, the device according to the invention has a particularly high level of reliability if each of the fuel pumps has its own switch.
Eine Überprüfung der Funktionstüchtigkeit der elektronischen Steuerung erfordert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen Aufwand, wenn die Überwachungseinrichtung und die Steuereinheit der Brennkraftmaschine einen gemeinsamen Anschluss für eine Diagnoseeinrichtung aufweisen. Hierbei lassen sich die elektronische Steuerung, der Druckregler und die Überwachungseinrichtung einfach mit der ohnehin regelmäßig zu überprüfenden Steuereinheit der Brennkraftmaschine testen.According to another advantageous development of the invention, checking the functionality of the electronic control requires particularly little effort if the monitoring device and the control unit of the internal combustion engine have a common connection for a diagnostic device. Here, the electronic control, the pressure regulator and the monitoring device can easily be tested with the control unit of the internal combustion engine, which is to be checked regularly.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt in einer einzigen Figur schematisch eine erfindungsgemäße Einrichtung zur Regelung der Leistung zweier Kraftstoffpumpen 1, 2. Die Einrichtung hat eine elektronische Steuerung 3 und eine Überwachungseinrichtung 4. Die elektronische Steuerung 3 ist mit einer Steuereinheit 5 einer Brennkraftmaschine des Kraftfahrzeuges und mit einem in einer Ein- spritzleiste 6 angeordneten Drucksensor 7 verbunden. Hierdurch kann die elektronische Steuerung 3 in Abhängigkeit von den Signalen der Steuereinheit 5 und dem in der Einspritzleiste 6 herrschenden Druck die Leistung der Kraftstoffpumpen 1, 2 regeln.The invention permits numerous embodiments. To further clarify its basic principle, one of these is shown in the drawing and is described below. In a single figure, this shows schematically a device according to the invention for regulating the power of two Fuel pumps 1, 2. The device has an electronic control 3 and a monitoring device 4. The electronic control 3 is connected to a control unit 5 of an internal combustion engine of the motor vehicle and to a pressure sensor 7 arranged in an injection bar 6. As a result, the electronic control 3 can regulate the output of the fuel pumps 1, 2 as a function of the signals from the control unit 5 and the pressure prevailing in the injection bar 6.
Ein von der elektronischen Steuerung 3 erzeugtes Signal wird von der Überwachungseinrichtung 4 überprüft. Die Überwachungseinrichtung 4 ist mit einem Relais 8 verbunden. Das Relais 8 steuert zwei Schalter 9, 10 an, die die Verbindung der Kraftstoffpumpen 1, 2 entweder mit dem in der Zeichnung mit V+ und Masse gekennzeichneten Stromnetz oder mit der elektronischen Steuerung 3 herstellen. Die elektronische Steuerung 3 hat einen Regler 11, eine Pulsweitenmodulation 12 und zwei Steuereinheiten 13, 14. Die Steuereinheiten 13, 14 sind jeweils einer Kraftstoffpumpe 1, 2 zugeordnet.A signal generated by the electronic control 3 is checked by the monitoring device 4. The monitoring device 4 is connected to a relay 8. The relay 8 controls two switches 9, 10, which establish the connection of the fuel pumps 1, 2 either with the power supply marked V + and ground in the drawing or with the electronic control 3. The electronic control 3 has a controller 11, a pulse width modulation 12 and two control units 13, 14. The control units 13, 14 are each assigned to a fuel pump 1, 2.
Die Steuereinheit 5 der Brennkraftmaschine und die Überwachungseinrichtung 4 sind mit einem gemeinsamen Diagnosean- schluss 15 verbunden. Über die zu dem Diagnoseanschluss 15 führende Leitung 16 werden zudem die Steuersignale der Überwachungseinrichtung 4 zu dem Relais 8 übertragen.The control unit 5 of the internal combustion engine and the monitoring device 4 are connected to a common diagnostic connection 15. The control signals of the monitoring device 4 are also transmitted to the relay 8 via the line 16 leading to the diagnostic connection 15.
Ein Ausfall der elektronischen Steuerung 3 wird von der Überwachungseinrichtung 4 erfasst. Die Überwachungseinrichtung 4 steuert bei einem Ausfall der elektronischen Steuerung 3 das Relais 8 an, welches anschließend die Verbindung der Kraftstoffpumpen 1, 2 von der elektronischen Steuerung 3 auf das Stromnetz umschaltet. Hierdurch werden die Kraftstoffpumpen 1, 2 ungeregelt mit voller Leistung betrieben. Der von den Kraftstoffpumpen 1, 2 erzeugte Druck wird von einem mechanischen Druckregler 17 auf beispielsweise 6 bar begrenzt . Überschüssiger Kraftstoff wird über eine Abregelleitung 18 in den Kraftstoffbehälter zurückgeleitet. Wenn die Kraftstoffpumpen 1, 2 über die elektronische Steuerung 3 geregelt werden, wird der erzeugte Druck in der Einspritzleiste 6 grundsätzlich unterhalb von 6 bar gehalten, so dass der mechanische Druckregler 17 die Abregelleitung 18 ständig verschließt. A failure of the electronic control 3 is detected by the monitoring device 4. If the electronic control 3 fails, the monitoring device 4 controls the relay 8, which then switches over the connection of the fuel pumps 1, 2 from the electronic control 3 to the power supply. As a result, the fuel pumps 1, 2 are operated at full power without control. The pressure generated by the fuel pumps 1, 2 is limited by a mechanical pressure regulator 17 to, for example, 6 bar. Excess fuel is fed into the Fuel tank returned. If the fuel pumps 1, 2 are controlled by the electronic control 3, the pressure generated in the injection bar 6 is generally kept below 6 bar, so that the mechanical pressure regulator 17 closes the shutoff line 18 at all times.

Claims

Patentansprüche claims
1. Einrichtung zur Ansteuerung einer elektrischen Kraftstoffpumpe für ein Kraftfahrzeug mit einer zwischen einem Stromnetz und der Kraftstoff umpe angeordneten elektronischen Steuerung zur Regelung der Leistung der Kraftstoffpumpe und mit einem Drucksensor zur Überwachung eines von der Kraftstoffpumpe erzeugten Drucks, dadurch gekennzeichnet, dass die elektronische Steuerung (3) mit einer Überwachungseinrichtung (4) verbunden ist und Mittel zur Verbindung der Kraftstoffpumpe (1, 2) mit dem Stromnetz bei einer Störung der elektronischen Steuerung (3) vorgesehen sind.1. Device for controlling an electric fuel pump for a motor vehicle with an electronic control arranged between a power supply and the fuel umpe for regulating the power of the fuel pump and with a pressure sensor for monitoring a pressure generated by the fuel pump, characterized in that the electronic control ( 3) is connected to a monitoring device (4) and means are provided for connecting the fuel pump (1, 2) to the power network in the event of a fault in the electronic control (3).
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die elektronische Steuerung (3) oder die Überwachungseinrichtung (4) Mittel zur Verbindung der Kraftstoffpumpe (1, 2) mit dem Stromnetz bei einer Störung des Drucksensors (7) aufweist .2. Device according to claim 1, characterized in that the electronic control (3) or the monitoring device (4) has means for connecting the fuel pump (1, 2) to the power supply in the event of a fault in the pressure sensor (7).
3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, *dass die Verbindung der Kraftstoffpumpe (1, 2) mit dem Stromnetz ungeregelt ist.3. Device according to claim 1 or 2, characterized in that * the connection of the fuel pump (1, 2) to the power supply is unregulated.
4. Einrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kraftstoffpumpe (1, 2) einen Schalter (9, 10) hat, dass der Schalter (9, 10) von der Überwachungseinrichtung (4) ansteuerbar ist und zur Verbindung der Kraftstoffpumpe (1, 2) in der einen Stellung mit der elektronischen Steuerung (3) und in der anderen Stellung mit dem Stromnetz ausgebildet ist.4. Device according to at least one of the preceding claims, characterized in that the fuel pump (1, 2) has a switch (9, 10), that the switch (9, 10) can be controlled by the monitoring device (4) and for connecting the Fuel pump (1, 2) is formed in one position with the electronic control (3) and in the other position with the power supply.
5. Einrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schalter (9, 10) ein Relais (8) aufweist.5. Device according to at least one of the preceding claims, characterized in that the switch (9, 10) has a relay (8).
6. Einrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine einzige elektroni- sehe Steuerung (3) zur Ansteuerung mehrerer Kraftstoffpumpen (1, 2) ausgebildet ist.6. Device according to at least one of the preceding claims, characterized in that a single electronic see control (3) for controlling a plurality of fuel pumps (1, 2) is formed.
7. Einrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kraftstoff umpe (1, 2) mit einem mechanischen Druckregler (17) verbunden ist.7. Device according to at least one of the preceding claims, characterized in that the fuel umpe (1, 2) is connected to a mechanical pressure regulator (17).
8. Einrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede der Kraftstoffpumpen (1, 2) einen eigenen Schalter (9, 10) hat.8. Device according to at least one of the preceding claims, characterized in that each of the fuel pumps (1, 2) has its own switch (9, 10).
9. Einrichtung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Überwachungseinrichtung (4) und die Steuereinheit (5) der Brennkraftmaschine einen gemeinsamen Anschluss (15) für eine Diagnoseeinrichtung aufweisen. 9. Device according to at least one of the preceding claims, characterized in that the monitoring device (4) and the control unit (5) of the internal combustion engine have a common connection (15) for a diagnostic device.
EP02774453A 2001-11-01 2002-10-10 Device for control of an electric fuel pump Withdrawn EP1440232A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10153396 2001-11-01
DE10153396A DE10153396A1 (en) 2001-11-01 2001-11-01 Device for controlling an electric fuel pump
PCT/DE2002/003821 WO2003040535A1 (en) 2001-11-01 2002-10-10 Device for control of an electric fuel pump

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EP1440232A1 true EP1440232A1 (en) 2004-07-28

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EP02774453A Withdrawn EP1440232A1 (en) 2001-11-01 2002-10-10 Device for control of an electric fuel pump

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US (1) US20040250611A1 (en)
EP (1) EP1440232A1 (en)
JP (1) JP2005508472A (en)
DE (1) DE10153396A1 (en)
WO (1) WO2003040535A1 (en)

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AU2011328673B2 (en) * 2010-11-09 2016-02-25 Betta Pharmaceuticals Co., Ltd Compound for increasing kinase active and application thereof

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Also Published As

Publication number Publication date
US20040250611A1 (en) 2004-12-16
JP2005508472A (en) 2005-03-31
DE10153396A1 (en) 2003-05-28
WO2003040535A1 (en) 2003-05-15

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