EP0846222B1 - Process for operating a fuel injection device - Google Patents
Process for operating a fuel injection device Download PDFInfo
- Publication number
- EP0846222B1 EP0846222B1 EP97914154A EP97914154A EP0846222B1 EP 0846222 B1 EP0846222 B1 EP 0846222B1 EP 97914154 A EP97914154 A EP 97914154A EP 97914154 A EP97914154 A EP 97914154A EP 0846222 B1 EP0846222 B1 EP 0846222B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- fuel injection
- pressure accumulator
- measuring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 114
- 238000002347 injection Methods 0.000 title claims description 50
- 239000007924 injection Substances 0.000 title claims description 50
- 238000000034 method Methods 0.000 title claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 230000003213 activating effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/088—Safety, indicating, or supervising devices relating to tightness
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
Definitions
- the invention is based on one of US Pat. No. 5,197,438 known methods for operating a fuel injection device, where the fuel in under high pressure in a high-pressure accumulator is promoted, the pressure of a pressure control valve is controlled and out of fuel for injection via electrically controlled injection valves is removed.
- Fuel injector it can happen that High pressure fuel storage system is leaking what especially with regard to the high injection pressures for injection of fuel in self-igniting internal combustion engines is particularly critical.
- the device can advantageously be used for Claim 3 a leakage amount occurring in the high pressure part capture or check according to claim 4 whether the controlled fuel injection quantity also the actually injected amount of carbon corresponds.
- a high-pressure fuel accumulator 1 is shown in the figure, via a delivery line 2 from a fuel pump 3, which sucks fuel from a fuel tank 4 with Fuel is supplied at high injection pressure brought. There are pressures that essentially are above 1,000 bar.
- the pressure in the high-pressure fuel reservoir is detected by a pressure sensor 6, the Signal is supplied to a control device 7 through which if a fixed or one is exceeded desired pressure, which depends on a particular Operating state of the associated internal combustion engine can, by a corresponding signal, a pressure control valve 9 is controlled. This is located in a fuel return line 10 from the high-pressure fuel store the fuel tank 4.
- the fuel pump is z. B. in sync with that of the Fuel injector operated Internal combustion engine driven, that is at a speed that is also already detected to control the injection.
- the Fuel pump can also be separated by a special Drive can be operated, and the related Drive speed of the fuel pump is also detected be, e.g. B. by a speed sensor 15.
- this Drive speed With the help of this Drive speed and the fact that the fuel pump promotes a constant flow rate per revolution, lets now with the help of this speed in the high-pressure fuel accumulator indirectly record the amount of fuel supplied, so that on a flow meter for immediate Measurement of the fuel quantity dispensed with can be. But also when the fuel pump is off certain reasons with a variable funding volume works, the amount of fuel delivered by this can also from the control signals or advantageous by a quantity measuring device 22.
- the Pressure control valve controlled fuel quantity by means of a Flow meter 17 in the fuel return line 10 can be measured.
- the one corresponding to this crowd Signal added to one of the total fuel injection quantity corresponding in time unit, from the control device emitted signal is now using a comparison device 18 with the corresponding processed signal for the delivery rate of the delivery pump 3 compared from the speed signal. If there is a deviation from The amount of fuel supplied and discharged is now by the control device 7 a, triggered by the Comparison device 18, a signal for a display 20 or for an intervention in the operation of the Fuel injector issued. You can use this signal z. B. the drive of the fuel pump 3 be turned off or the entire fuel injector stopped in the internal combustion engine or on emergency operation can be reduced.
- a flow rate measuring device 17 can be known in itself Way inserted into the fuel return line 10 Throttle are provided and the pressure in front and after the throttle are compared to each other around to form a quantity signal from it.
- Such flow measuring devices e.g. in connection with injectors described in DE-A-3722264. It is also possible to use other suitable sensors. For example, can advantageously a sensor already used for another purpose are used economically, e.g. Sensors that also be used for air mass measurement and by physical structure are known from DE-A-29 19 433.
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)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung geht aus von einem durch die US-PS 5 197 438 bekannten Verfahren zum Betrieb einer Kraftstoffeinspritzeinrichtung, bei der der Kraftstoff in unter Hochdruck in einen Hochdruckspeicher gefördert wird, dessen Druck durch ein Drucksteuerventil gesteuert wird und aus dem Kraftstoff zur Einspritzung über elektrisch gesteuerte Einspritzventile entnommen wird. Bei der in bekannter Weise betriebenen Kraftstoffeinspritzeinrichtung kann es vorkommen, daß das Kraftstoffhochdruckspeichersystem undicht wird, was insbesondere in bezug auf die hohen Einspritzdrücke zur Einspritzung von Kraftstoff bei selbstzündenden Brennkraftmaschinen besonders kritisch ist.The invention is based on one of US Pat. No. 5,197,438 known methods for operating a fuel injection device, where the fuel in under high pressure in a high-pressure accumulator is promoted, the pressure of a pressure control valve is controlled and out of fuel for injection via electrically controlled injection valves is removed. When operated in a known manner Fuel injector, it can happen that High pressure fuel storage system is leaking what especially with regard to the high injection pressures for injection of fuel in self-igniting internal combustion engines is particularly critical.
Nach dem Abstract der JP-A-62 130 51 wird in einem Hochdruckspeicher-Kraftstoff-Einspritzsystem (kurz nach einer Einspritzung) die zugeführte Kraftstoffmenge (=0, Pumpe fördert nicht) mit der abgeführten Kraftstoffmenge(, die auch Null sein sollte, da keine Einspritzung stattfindet) verglichen. Wird aufgrund eines Druckabfalls festgestellt, daß trotzdem eine Abfuhr von Kraftstoff stattfindet, wird auf ein Leck geschlossen.According to the abstract of JP-A-62 130 51 , in a high-pressure accumulator fuel injection system (shortly after an injection) the amount of fuel supplied (= 0, pump does not deliver) with the amount of fuel removed (which should also be zero, since none Injection takes place) compared. If it is determined on the basis of a drop in pressure that fuel is still being removed, a leak is concluded.
Es kann ferner auch vorkommen, daß auf Grund einer Fehlfunktion die tatsächlich dem Hochdruckspeicher zugeführte Kraftstoffmenge nicht gleich der Menge ist, die für die Kraftstoffeinspritzung vorgesehen und für die Druckregelung erforderlich ist.It can also happen that due to a malfunction the actually fed to the high pressure accumulator Amount of fuel is not the same as that for Fuel injection provided and for pressure control is required.
Mit dem erfindungsgemäßen Verfahren nach Anspruch 1 zum Betrieb einer Kraftstoffeinspritzeinrichtung
der gattungsgemäßen Art ist es nun
möglich, in exakter Weise festzustellen, wenn bei einem
solchen bekannten Hochdrucksystem, insbesondere im Hochdruckteil
wie im Bereich des Hochdruckspeichers und des
Kraftstoffeinspritzventils, eine Fehlfunktion vorliegt. Bei
Auftreten einer somit erfaßten Fehlfuntion kann in vorteilhafter
Weise gewarnt werden oder direkt ein entsprechender
Eingriff in die Kraftstoffeinspritzeinrichtung zur Vermeidung
weiterer Schäden vorgenommen werden.With the inventive method according to
Vorteilhaft läßt sich dabei durch die Einrichtung nach Patentanspruch 3 eine im Hochdruckteil auftretende Leckmenge erfassen oder gemäß Patentanspruch 4 überprüfen, ob die gesteuerte Kraftstoffeinspritzmenge auch der tatsächlich eingespritzten Karftstoffmenge entspricht.The device can advantageously be used for Claim 3 a leakage amount occurring in the high pressure part capture or check according to claim 4 whether the controlled fuel injection quantity also the actually injected amount of carbon corresponds.
Vorteilhaft läßt sich ferner anstelle einer unmittelbaren Messung der dem Hochdruckspeicher zugeführten Hochdruckmenge aus Antriebsdrehzahl der Kraftstoffpumpe und deren konstanter Fördermenge pro Umdrehung der Antriebswelle die geförderte Menge durch eine Steuereinrichtung leicht mittelbar erfassen und mit den bereits zur Steuerung der Kraftstoffeinspritzventile notwendigen Signale, die der eingespritzten Kraftstoffmenge entsprechen, verknüpfen.It can also be advantageous instead of an immediate one Measurement of the high-pressure quantity supplied to the high-pressure accumulator from the drive speed of the fuel pump and its constant Flow per revolution of the drive shaft amount conveyed easily indirectly by a control device capture and use those already to control the Fuel injectors necessary signals that the correspond to injected fuel quantity, link.
Weitere vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.Further advantageous embodiments are the subclaims refer to.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is in the drawing shown and is described in more detail in the following description explained.
In der Figur ist ein Kraftstoffhochdruckspeicher 1 gezeigt,
der über eine Förderleitung 2 von einer Kraftstoffpumpe 3,
die aus einem Kraftstoffbehälter 4 Kraftstoff ansaugt, mit
Kraftstoff versorgt wird, der auf hohen Einspritzdruck
gebracht ist. Es treten dabei Drücke auf, die im wesentlichen
über 1 000 bar liegen. Der Druck im Kraftstoffhochdruckspeicher
wird durch einen Druckgeber 6 erfaßt, dessen
Signal einer Steuereinrichtung 7 zugeführt wird, durch die
bei Überschreiten eines fest eingestellten oder eines
gewünschten Druckes, der abhängig von einem jeweiligen
Betriebszustand der zugehörigen Brennkraftmaschine sein
kann, durch ein entsprechendes Signal ein Drucksteuerventil
9 angesteuert wird. Dieses befindet sich in einer Kraftstoffrücklaufleitung
10 vom Kraftstoffhochdruckspeicher zu
dem Kraftstoffbehälter 4. Vom Kraftstoffhochdruckspeicher
führen ferner Druckleitungen 11 ab, die mit je einem Kraftstoffeinspritzventil
14 verbunden sind, über das zum
geeigneten Zeitpunkt jeweils eine gewünschte Kraftstoffmenge
an der Brennkraftmaschine eingespritzt werden kann. Die
Steuerung der Kraftstoffeinspritzmenge nach Zeitpunkt und
Menge erfolgt ebenfalls über die Steuereinrichtung 7, die zu
dieser Steuerung Steuersignale entsprechend der Drehzahl und
der Last, unter der die zugehörige Brennkraftmaschine
betrieben werden soll, erhält. Die Steuerung dieser
Kraftstoffeinspritzmenge erfolgt z. B. in bekannter Weise
durch Magnetventile, die die Verbindung zwischen dem
Hochdruckspeicher und dem Kraftstoffeinspritzventil steuern.
Dabei evtl. auftretende Kraftstoff-Steuermengen, die in den
Tank zurückfließen, können ebenfalls über die Rücklaufleitung
10 in den Tank zurückgefördert werden.A high-
Die Kraftstoffpumpe wird dabei z. B. synchron zu der von der
Kraftstoffeinspritzeinrichtung betriebenen
Brennkraftmaschine angetrieben, also mit einer Drehzahl, die
auch bereits zur Steuerung der Einspritzung erfaßt wird. Die
Kraftstoffpumpe kann aber auch separat durch eine speziellen
Antrieb betrieben werden, und dabei kann die diesbezügliche
Antriebsdrehzahl der Kraftstoffpumpe ebenfalls erfaßt
werden, z. B. durch einen Drehzahlgeber 15. Mit Hilfe dieser
Antriebsdrehzahl und der Tatsache, daß die Kraftstoffpumpe
pro Umdrehung eine gleichbleibende Fördermenge fördert, läßt
sich nun mit Hilfe dieser Drehzahl die im Kraftstoffhochdruckspeicher
zugeführte Kraftstoffmenge mittelbar erfassen,
so daß auf eine Durchflußmengenmeßeinrichtung zur unmittelbaren
Messung der geförderten Kraftstoffmenge verzichtet
werden kann. Aber auch, wenn die Kraftstofförderpumpe aus
bestimmten Gründen mit einem variablen Fördervolumen
arbeitet, läßt sich die von dieser geförderte Kraftstoffmenge
ebenfalls aus den Steuersignalen oder vorteilhaft
durch eine Mengenmeßeinrichtung 22 erfassen.The fuel pump is z. B. in sync with that of the
Fuel injector operated
Internal combustion engine driven, that is at a speed that
is also already detected to control the injection. The
Fuel pump can also be separated by a special
Drive can be operated, and the related
Drive speed of the fuel pump is also detected
be, e.g. B. by a
Da es bei einem Betrieb der Kraftstoffeinspritzeinrichtung
mit sehr hohen Drücken kritisch ist, wenn Undichtigkeiten im
Hochdrucksystem, insbesondere am Hochdruckspeicher 1, auftreten,
ist es erforderlich, die Dichtheit dieses Speichers
zu überwachen. Da die Versorgung mit Hochdruckkraftstoff bei
dieser Einspritzeinrichtung nicht intermittierend sondern
aus einem ständig gefülltem Hochdruckspeicher erfolgt, ist
es ferner auch sehr wichtig, festzustellen, ob die
Kraftstoffeinspritzventile richtig arbeiten, weil es sonst
zu erheblichen Schäden an der Brennkraftmaschine kommen
kann. Mit Hilfe der über die Förderpumpe 3 zugeführten
Kraftstoffmenge und der über die Kraftstoffeinspritzventile
14 abgeführten Kraftstoffmenge in Verbindung mit der zur
Druckregelung des Kraftstoff-drucks im Hochdruckspeicher
abgeführten Kraftstoffmenge sowie der evtl. anfallenden
Steuermengen für die Einspritz-einrichtung läßt sich nun
eine Bilanz aus zugeführtem Kraftstoff und abgeführtem
Kraftstoff aufstellen. Dazu muß jedoch die über das
Drucksteuerventil abgesteuerte Kraftstoffmenge mittels einer
Durchflußmengenmeßeinrichtung 17 in der Kraftstoffrücklaufleitung
10 gemessen werden. Das dieser Menge entsprechende
Signal, addiert zu einem der gesamten Kraftstoffeinspritzmenge
in der Zeiteinheit entsprechenden, von
der Steuereinrichtung abgebbaren Signal, wird nun mit Hilfe
einer Vergleichseinrichtung 18 mit dem entsprechend
aufgearbeiteten Signal für die Fördermenge der Förderpumpe 3
aus dem Drehzahlsignal verglichen. Bei Abweichung von
zugeführter und wieder abgeführter Kraftstoffmenge wird nun
durch die Steuereinrichtung 7 a, ausgelöst durch die
Vergleichseinrichtung 18, ein Signal für eine Anzeige 20
oder für einen Eingriff in den Betrieb der
Kraftstoffeinspritzeinrichtung abgegeben. Dabei kann mit
diesem Signal z. B. der Antrieb der Kraftstoffpumpe 3
abgeschaltet werden oder die gesamte Kraftstoffeinspritzeinrichtung
in der Brennkraftmaschine stillgesetzt oder auf
einen Notbetrieb reduziert werden. Since it is in operation of the fuel injector
is critical at very high pressures if leaks in the
High-pressure system, in particular on high-
Wird die mittelbare Messung der dem Hochdruckspeicher zugeführten
Kraftstoffmenge wie oben erwähnt durch eine unmittelbare
Messung ersetzt, kann bei als dicht vorausgesetztem
Hochdruckspeicher nebst Hochdruckleitungen auch
noch die Funktion der Kraftstoffeinspritzventile überwacht
werden. Dazu wird in die Förderleitung 2 ebenfalls eine in
der Zeichnung gestrichelt eingetragene Durchflußmengenmeßeinrichtung
22 eingesetzt wird, die als erste Durchflußmengenmeßeinrichtung
zu bezeichnen ist, im Gegensatz zur
zweiten Durchflußmengenmeßeinrichtung 17 in der Kraftstoffrückflußleitung
10. Es ergibt sich dabei ein Ist-wert der
eingespritzten Kraftstoffmenge. Diese wird mit der der
Steuereinrichtung vorgegebenen Soll-Einspritzmenge
verglichen. Aus dem Vergleichsergbnis kann ermittelt werden,
ob die Kraftstoffeinspritzventile fehlerfrei arbeiten und
bei Bedarf ein Korrekturwert für die Steuereinrichtung
gebildet werden.Is the indirect measurement of the high pressure storage supplied
Amount of fuel as mentioned above by an immediate
Measurement can be replaced if the
High-pressure accumulator and high-pressure lines too
still monitors the function of the fuel injection valves
become. For this purpose, an in
the flow rate measuring device entered in
Als Durchflußmengenmeßeinrichtung 17 kann in ansich bekannter
Weise eine in die Kraftstoffrücklaufleitung 10 eingesetzte
Drossel vorgesehen werden und dabei der Druck vor
und nach der Drossel mit einander verglichen werden um
daraus ein Mengensignal zu bilden. Solche Durchflußmengenmeßeinrichtungen
werden z.B. in Zusammenhang mit Einspritzeinrichtungen
in der DE-A-3722264 beschrieben. Es ist auch
möglich andere geeignete Sensoren einzusetzen. Z.B. kann
vorteilhaft ein bereits zu anderem Zweck verwendeter Sensor
wirtschaftlich eingesetzt werden, wie z.B. Sensoren, die
auch für die Luftmassenmessung verwendet werden und von
physikalischem Aufbau durch die DE-A-29 19 433 bekannt sind.As a flow
Claims (7)
- Method of operating a fuel injection device in which fuel is pumped under high pressure into a high-pressure accumulator (1), the pressure of which is controlled by means of a pressure control valve (9) and from which fuel is removed under the control of a control device for injection via at least one fuel injection valve (14), characterized in that, for the purpose of monitoring the injection device and detecting malfunctioning of the injection device, the fuel quantity fed to the high-pressure accumulator (1) is measured by a first quantity-measuring device (22), and the fuel quantity released from the high-pressure accumulator to maintain the pressure in the high-pressure accumulator (1) is measured by a second quantity-measuring device (17), their values being compared with the fuel injection quantity preset for the fuel-quantity control device for controlling the fuel injection valves and, if the quantities differ from one another, a signal being produced for indication purposes or to influence the operation of the fuel injection device.
- Method according to Claim 1, characterized in that the measuring device for measuring the fuel quantity fed to the high-pressure accumulator (1) comprises a device for detecting the driven speed of the high-pressure feed pump (3), which pumps the fuel at high pressure at a geometrically constant delivery rate per revolution of its drive shaft, the control value of the fuel injection quantity per unit time being detected from signals for controlling the injection quantity, and the fuel quantity released from the high-pressure accumulator (1) to maintain the pressure in the latter being detected by a quantity-measuring device (17) that measures the fuel quantity released.
- Fuel injection device for carrying out the method according to Claim 2, with a high-pressure feed pump (3), which pumps fuel at a feed rate associated with its driven speed and constant in relation to this driven speed into a high-pressure accumulator (1), which is connected by a plurality of delivery lines (11) to respective fuel injection valves (14), the inflow to the individual fuel injection valves (14) being accomplished by means of electrically controlled valves, and it furthermore being possible to relieve the high-pressure accumulator (1) via a fuel return line (10) having a pressure control valve (9) controlled as a function of the pressure in the high-pressure accumulator, characterized in that the fuel return line (10) has arranged in it a flow-measuring device (17) that is connected to a control device (7, 7a, 18, 19) that has a device (19) for detecting the volume delivered by the high-pressure feed pump (3) per unit time, and with a device for detecting the fuel quantity injected per unit time and a comparison device (18) for determining a difference between the fuel quantity pumped into the high-pressure accumulator and the sum of the fuel quantities detected by the flow-measuring device and the fuel quantity injected per unit time and for forming a signal for indication purposes or influencing the operation of the fuel injection device if a difference occurs.
- Fuel injection device for carrying out the method according to Claim 1, with a high-pressure feed pump (3), which pumps fuel into a high-pressure accumulator (1), which is connected by a plurality of delivery lines (11) to respective fuel injection valves (14), the inflow to the individual fuel injection valves (14) being accomplished by means of electrically controlled valves, and it furthermore being possible to relieve the high-pressure accumulator (1) via a fuel return line (10) having a pressure control valve (9) controlled as a function of the pressure in the high-pressure accumulator, characterized in that the fuel feed line to the high-pressure accumulator has arranged in it a first flow-measuring device (22) and the fuel return line (10) from the high-pressure accumulator has arranged in it a second flow-measuring device (17), which are both connected to a control device (7, 7a, 18, 19) that controls the fuel quantity to be injected per unit time according to the preset by activating the fuel injection valves and has a device (18) for forming the difference between the fuel quantity pumped into the high-pressure accumulator and the fuel quantity returned detected by the second flow-measuring device, which, as the fuel quantity actually injected via the fuel injection valves, is compared by the control device with the preset fuel injection quantity to be controlled, and if there is a difference a signal for indication purposes or for influencing the operation of the fuel injection device is formed.
- Fuel injection device according to Claim 3, characterized in that the control device (7, 7a) has a fuel quantity control device, which receives signals for the load (QK) demanded and signals for the speed (n) of the internal combustion engine from a speed signal source and by means of which control signals for controlling the electrically controlled injection valves (14) are produced and these signals are fed, for the purpose of detecting the fuel quantity released from the high-pressure accumulator for injection, to the comparison device (18), which furthermore receives signals from a device (19) that is connected to the speed-signal source or to a speed transmitter (15), which at least indirectly determines the driven speed of the high-pressure feed pump, for the purpose of detecting the volume delivered by the feed pump.
- Fuel injection device according to one of preceding Claims 3-5, characterized in that the flow-measuring device has a flow restrictor, which is arranged in the fuel feed or return line and with a measuring device for the pressure drop prevailing at it as a measure of the flow rate.
- Fuel injection device according to one of preceding Claims 4 to 6, characterized in that a hot-film mass sensor is used as the flow-measuring device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996125487 DE19625487A1 (en) | 1995-09-14 | 1996-06-26 | Fuel injection system operation for IC engine |
| DE19625487 | 1996-06-26 | ||
| PCT/DE1997/000293 WO1997049909A1 (en) | 1996-06-26 | 1997-02-14 | Process for operating a fuel injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0846222A1 EP0846222A1 (en) | 1998-06-10 |
| EP0846222B1 true EP0846222B1 (en) | 2001-11-28 |
Family
ID=7798016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97914154A Expired - Lifetime EP0846222B1 (en) | 1996-06-26 | 1997-02-14 | Process for operating a fuel injection device |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6119656A (en) |
| EP (1) | EP0846222B1 (en) |
| JP (1) | JPH11511832A (en) |
| KR (1) | KR19990043977A (en) |
| CN (1) | CN1079898C (en) |
| BR (1) | BR9702321A (en) |
| DE (1) | DE59705538D1 (en) |
| ES (1) | ES2169369T3 (en) |
| RU (1) | RU2170360C2 (en) |
| WO (1) | WO1997049909A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69916363T2 (en) * | 1998-05-29 | 2005-03-24 | Toyota Jidosha K.K., Toyota | Fuel supply for internal combustion engine |
| JP3695213B2 (en) * | 1999-04-02 | 2005-09-14 | いすゞ自動車株式会社 | Common rail fuel injection system |
| KR100448356B1 (en) * | 2001-08-11 | 2004-09-10 | 현대자동차주식회사 | Method For A Self Diagnosis In Vehicle |
| DE10141821C1 (en) * | 2001-08-27 | 2003-04-24 | Bosch Gmbh Robert | Method, computer program and control and / or regulating device for operating an internal combustion engine |
| JP2005127164A (en) * | 2003-10-21 | 2005-05-19 | Denso Corp | Common rail type fuel injection apparatus |
| DE102008001670B4 (en) * | 2008-05-08 | 2022-03-31 | Robert Bosch Gmbh | Method and device for operating an internal combustion engine |
| DE102013201997A1 (en) * | 2013-02-07 | 2014-08-07 | Robert Bosch Gmbh | Method and device for operating a fuel injection device, in particular a motor vehicle |
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| JPH06213051A (en) * | 1993-01-19 | 1994-08-02 | Nippondenso Co Ltd | Accumulating fuel injection system |
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- 1997-02-14 CN CN97190623A patent/CN1079898C/en not_active Expired - Fee Related
- 1997-02-14 WO PCT/DE1997/000293 patent/WO1997049909A1/en not_active Application Discontinuation
- 1997-02-14 KR KR1019980701208A patent/KR19990043977A/en not_active Application Discontinuation
- 1997-02-14 ES ES97914154T patent/ES2169369T3/en not_active Expired - Lifetime
- 1997-02-14 BR BR9702321A patent/BR9702321A/en not_active IP Right Cessation
- 1997-02-14 RU RU98105634/06A patent/RU2170360C2/en not_active IP Right Cessation
- 1997-02-14 JP JP10502037A patent/JPH11511832A/en active Pending
- 1997-02-14 EP EP97914154A patent/EP0846222B1/en not_active Expired - Lifetime
- 1997-02-14 DE DE59705538T patent/DE59705538D1/en not_active Expired - Fee Related
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1998
- 1998-02-19 US US09/029,085 patent/US6119656A/en not_active Expired - Fee Related
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| DE1922986A1 (en) * | 1969-05-06 | 1971-01-21 | Erdoel Raffinerie Mannheim Gmb | Method for the quick detection of a leak when transporting liquids in pipelines |
| US4727748A (en) * | 1984-12-25 | 1988-03-01 | Nippon Kokan Kabushiki Kaisha | Method and apparatus for detecting leaks in a gas pipe line |
| EP0545450A1 (en) * | 1991-11-06 | 1993-06-09 | Shell Internationale Researchmaatschappij B.V. | Statistically detecting leakage of fluid from a conduit |
| JPH06213051A (en) * | 1993-01-19 | 1994-08-02 | Nippondenso Co Ltd | Accumulating fuel injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11511832A (en) | 1999-10-12 |
| ES2169369T3 (en) | 2002-07-01 |
| KR19990043977A (en) | 1999-06-25 |
| DE59705538D1 (en) | 2002-01-10 |
| BR9702321A (en) | 1999-03-09 |
| WO1997049909A1 (en) | 1997-12-31 |
| US6119656A (en) | 2000-09-19 |
| RU2170360C2 (en) | 2001-07-10 |
| EP0846222A1 (en) | 1998-06-10 |
| CN1079898C (en) | 2002-02-27 |
| CN1194681A (en) | 1998-09-30 |
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