EP1092858A2 - Method and device for controlling an internal combustion engine - Google Patents

Method and device for controlling an internal combustion engine Download PDF

Info

Publication number
EP1092858A2
EP1092858A2 EP00120364A EP00120364A EP1092858A2 EP 1092858 A2 EP1092858 A2 EP 1092858A2 EP 00120364 A EP00120364 A EP 00120364A EP 00120364 A EP00120364 A EP 00120364A EP 1092858 A2 EP1092858 A2 EP 1092858A2
Authority
EP
European Patent Office
Prior art keywords
sensor signal
internal combustion
combustion engine
pressure
fuel
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
EP00120364A
Other languages
German (de)
French (fr)
Other versions
EP1092858A3 (en
EP1092858B1 (en
Inventor
Ruediger Dr.-Ing. Fehrmann
Andreas Dipl.-Ing. Kellner
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 EP1092858A2 publication Critical patent/EP1092858A2/en
Publication of EP1092858A3 publication Critical patent/EP1092858A3/en
Application granted granted Critical
Publication of EP1092858B1 publication Critical patent/EP1092858B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02D41/22—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
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
    • 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
    • F02D2041/223—Diagnosis of fuel pressure sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/31—Control of the fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • 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
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves

Definitions

  • the invention relates to a method and a device for controlling an internal combustion engine according to the generic terms of independent claims.
  • a method and an apparatus for controlling a Internal combustion engines are known from DE 195 48 278.
  • CR system common rail system
  • the control duration of the injectors depends on the amount of fuel to be injected and the pressure in the accumulator given.
  • the pressure in the memory becomes speed-synchronous detected.
  • the pressure control takes place in a fixed Time grid. For this purpose, the one already detected in synchronism with the speed Rail pressure scanned synchronously.
  • the invention has for its object in a method and a device for controlling an internal combustion engine to reduce the quantity errors of the type mentioned at the beginning and thus the emission behavior of the internal combustion engine to improve. This task is carried out in the Features characterized independent claims solved.
  • FIG. 1 shows 2 shows a block diagram of the device according to the invention
  • FIG. 2 a detailed block diagram of the device according to the invention.
  • a fuel reservoir denotes a fuel reservoir. This stands over a first filter 105, a prefeed pump 110 with a second filter means 115 in connection. From the second Filter medium 115 passes the fuel through a line to a high pressure pump 125. The connecting line between the filter medium 115 and the high pressure pump 125 stands with a reservoir via a low pressure relief valve 145 100 connected. The high pressure pump 125 is stopped connected to a Rail 130. The Rail 130 is also called Storage means and is located on fuel lines different injectors 131 in contact. Via a pressure relief valve 135 is the rail 130 with the fuel tank 100 connectable. The pressure relief valve 135 is by means of a coil 136 controllable.
  • the lines between the outlet of the high pressure pump 125 and the inlet of the pressure control valve 135 are called the high pressure area designated.
  • the fuel is in this area under high pressure.
  • the pressure in the high pressure area will detected by a sensor 140.
  • the lines between the Tank 100 and high pressure pump 125 are called the low pressure area designated.
  • a controller 160 acts on the high-pressure pump 125 a control signal AP, the injectors 131 with a control signal A and / or the pressure relief valve 135 with control signal AV.
  • the controller 160 processes various signals various sensors 165, which determine the operating state the internal combustion engine and / or the motor vehicle that the Internal combustion engine drives, characterize. Such a The operating state is, for example, the speed N of the internal combustion engine.
  • the fuel is in the reservoir, is from the feed pump 110 promoted by the filter means 105 and 115.
  • the low pressure relief valve 145 opens gives the connection between the output of the pre-feed pump 110 and the reservoir 100 free.
  • the high pressure pump 125 delivers the amount of fuel Q1 from Low pressure area in the high pressure area.
  • the high pressure pump 125 builds up a very high pressure in the Rail 130.
  • Pressure values from about 30 to 100 bar and with auto-igniting Internal combustion pressures from about 1000 to 2000 bar achieved.
  • the fuel can be injected via the injectors 131 under high pressure the individual cylinders of the internal combustion engine be measured.
  • the pressure P in the rail or in the whole High pressure area detected.
  • the controllable High pressure pump 125 and / or the pressure relief valve 135 is the pressure in the high pressure area is regulated.
  • the output signal filtered by the pressure sensor and based on this filtered signal a correction value for correcting the sensor signal is formed.
  • the sensor signal corrected in this way is used for further control of the internal combustion engine.
  • the map is the Control duration for the injectors read out.
  • a bandpass filter is preferably used as the filter Center frequency of the camshaft frequency or an integer Fraction of the camshaft frequency corresponds.
  • FIG. 2 A corresponding device is shown in FIG. 2 as a block diagram shown.
  • a first output signal PT arrives at the sensor 140 positive sign for a first node 210.
  • the output signal PD of node 210 arrives at a filter 200, which in turn a first cylinder counter 220 acted upon.
  • the signal comes from the cylinder counter 220 optionally to one of the controllers 231, 232, 233 and 234.
  • the controllers 231 to 234 are preferably integral controllers educated.
  • the number of controllers corresponds the number of cylinders of the internal combustion engine, each A controller is assigned to the cylinder of the internal combustion engine. In the illustrated embodiment, it is a four-cylinder internal combustion engine, which is invention but without further ado on internal combustion engines with a different number of cylinders applicable. In this case there is a corresponding one Number of controllers.
  • the signal comes from the controllers 231 to 234 via a second cylinder counter 240 with a positive sign to one second node 250.
  • At the second input of the node 250 lies with a positive sign second output signal PN of the sensor 140.
  • the output signal PK of the second connection point 250 on the one hand a map 164 and the other with a negative sign to the second input of the first node 210.
  • the Map 164 also becomes a signal QK from a quantity specification 162 forwarded.
  • the map 164 acts on the injectors 131 with a control signal A.
  • the sensor 140 provides a signal that corresponds to the pressure in the High pressure area corresponds. This signal arrives first Signal PT at fixed time intervals to a node 210. Furthermore, the output signal of the Sensor as a second signal PN at fixed angular intervals the second node 250. This second signal, the reading out at certain angular intervals is preferably used for calculating the control duration A of the injectors.
  • the second sensor signal PN is detected at a certain angular position of the camshaft or crankshaft. As a rule, the data is recorded at the same one Angular position of the crankshaft or camshaft.
  • the first Signal PT is recorded at much smaller intervals. This signal is preferably at constant time intervals passed on, the signal being output several times per metering is preferably output in a 1 ms grid.
  • the two signals PT and PN compared, the second signal PN using a correction value K is correctable.
  • This difference PD thus formed of the two signals is filtered by the filter 200.
  • the filter 200 is preferably a bandpass filter with a center frequency that corresponds to the frequency with which the pressure vibrations occur. This means the center frequency corresponds to the camshaft frequency or integer Fractions of the camshaft frequency.
  • the signal filtered in this way passes through the cylinder counter 220 to one of the controllers 231 to 234. It is provided that a controller is assigned to each cylinder.
  • the output signal of the controller which adds up the filtered difference PD, arrives at the second connection point as correction value K, where this value K is additive to the second sensor signal PN is superimposed.
  • the sensor signal corrected in this way reaches the one to the map, where there is further control of the internal combustion engine, in particular the determination of the activation duration is used. Furthermore, the signal corrected in this way Junction point 210 compared to the first signal.

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)
  • Fuel-Injection Apparatus (AREA)

Abstract

The internal combustion engine control method involves detecting (140) the pressure in a pressure reservoir into which at least one pump delivers fuel. A correction value (K) for the pressure sensor signal is derived from the filtered sensor signal. A first sensor signal (PT) is detected at fixed time intervals and a second sensor signal (PN) at fixed angular intervals. The first signal is filtered and the second is corrected. Independent claims are also included for the following: an arrangement for controlling an internal combustion engine.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Steuerung einer Brennkraftmaschine gemäß den Oberbegriffen der unabhängigen Ansprüche.The invention relates to a method and a device for controlling an internal combustion engine according to the generic terms of independent claims.

Ein Verfahren und eine Vorrichtung zur Steuerung einer Brennkraftmaschine sind aus der DE 195 48 278 bekannt. Dort werden ein Verfahren und eine Vorrichtung zur Regelung des Druckes in einem Druckspeicher eines Common-Rail-Systems (CR-System) beschrieben. Üblicherweise wird bei solchen CR-Systemen die Ansteuerdauer der Injektoren abhängig von der einzuspritzenden Kraftstoffmenge und dem Druck im Speicher vorgegeben. Hierzu wird der Druck im Speicher drehzahlsynchron erfaßt. Die Druckregelung erfolgt in einem festen Zeitraster. Hierzu wird der bereits drehzahlsynchron erfaßte Raildruck zeitsynchron abgetastet.A method and an apparatus for controlling a Internal combustion engines are known from DE 195 48 278. There are a method and an apparatus for controlling the Pressure in a pressure accumulator of a common rail system (CR system). Commonly used in such CR systems the control duration of the injectors depends on the amount of fuel to be injected and the pressure in the accumulator given. For this purpose, the pressure in the memory becomes speed-synchronous detected. The pressure control takes place in a fixed Time grid. For this purpose, the one already detected in synchronism with the speed Rail pressure scanned synchronously.

Desweiteren ist aus der DE 197 35 561 bekannt, daß die Druckwerte in festen Zeitabständen abgetastet werden. Bei der Steuerung der eingespritzten Kraftstoffmenge ergeben sich nur dann genaue Mengenwerte, wenn der Druck des Kraftstoffs während der Einspritzung bekannt ist. Eine Ungenauigkeit der Druckmessung kann zu einem Mengenfehler und damit zu einem verschlechterten Emissionsverhalten der Brennkraftmaschine führen.Furthermore, it is known from DE 197 35 561 that the Pressure values can be sampled at fixed time intervals. At control the amount of fuel injected get accurate quantity values only when the pressure of the fuel is known during the injection. An inaccuracy the pressure measurement can lead to a quantity error and thus to a deteriorated emission behavior of the internal combustion engine to lead.

Aufgabe der ErfindungObject of the invention

Der Erfindung liegt die Aufgabe zugrunde, bei einem Verfahren und einer Vorrichtung zur Steuerung einer Brennkraftmaschine der eingangs genannten Art die Mengenfehler zu reduzieren und damit das Emissionsverhalten der Brennkraftmaschine zu verbessern. Diese Aufgabe wird durch die in den unabhängigen Ansprüchen gekennzeichneten Merkmale gelöst.The invention has for its object in a method and a device for controlling an internal combustion engine to reduce the quantity errors of the type mentioned at the beginning and thus the emission behavior of the internal combustion engine to improve. This task is carried out in the Features characterized independent claims solved.

Vorteile der ErfindungAdvantages of the invention

Vorteilhaft und zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous and practical refinements and developments the invention are characterized in the subclaims.

Zeichnungdrawing

Die Erfindung wird nachstehend anhand einer in der Zeichnung dargestellten Ausführungsform erläutert. Es zeigen Figur 1 ein Blockdiagramm der erfindungsgemäßen Vorrichtung, Figur 2 ein detailliertes Blockdiagramm der erfindungsgemäßen Vorrichtung.The invention is described below with reference to a drawing illustrated embodiment explained. 1 shows 2 shows a block diagram of the device according to the invention, FIG. 2 a detailed block diagram of the device according to the invention.

Beschreibung der AusführungsbeispieleDescription of the embodiments

  • In Figur 1 sind die für das Verständnis der Erfindung erforderlichen Bauteile eines Kraftstoffversorgungssystems einer Brennkraftmaschine mit Hochdruckeinspritzung dargestellt. Das dargestellte System wird üblicherweise als Common-Rail-System bezeichnet.In Figure 1 are those necessary for understanding the invention Components of a fuel supply system Internal combustion engine shown with high pressure injection. The system shown is usually called a common rail system designated.

    • Mit 100 ist ein Kraftstoffvorratsbehälter bezeichnet. Dieser steht über einen ersten Filter 105, eine Vorförderpumpe 110 mit einem zweiten Filtermittel 115 in Verbindung. Vom zweiten Filtermittel 115 gelangt der Kraftstoff über eine Leitung zu einer Hochdruckpumpe 125. Die Verbindungsleitung zwischen dem Filtermittel 115 und der Hochdruckpumpe 125 steht über ein Niederdruckbegrenzungsventil 145 mit dem Vorratsbehälter 100 in Verbindung. Die Hochdruckpumpe 125 steht mit einem Rail 130 in Verbindung. Das Rail 130 wird auch als Speicher bezeichnet und steht über Kraftstoffleitungen mit verschiedenen Injektoren 131 in Kontakt. Über ein Druckablaßventil 135 ist das Rail 130 mit dem Kraftstoffvorratsbehälter 100 verbindbar. Das Druckablaßventil 135 ist mittels einer Spule 136 steuerbar.100 denotes a fuel reservoir. This stands over a first filter 105, a prefeed pump 110 with a second filter means 115 in connection. From the second Filter medium 115 passes the fuel through a line to a high pressure pump 125. The connecting line between the filter medium 115 and the high pressure pump 125 stands with a reservoir via a low pressure relief valve 145 100 connected. The high pressure pump 125 is stopped connected to a Rail 130. The Rail 130 is also called Storage means and is located on fuel lines different injectors 131 in contact. Via a pressure relief valve 135 is the rail 130 with the fuel tank 100 connectable. The pressure relief valve 135 is by means of a coil 136 controllable.

    Die Leitungen zwischen dem Ausgang der Hochdruckpumpe 125 und dem Eingang des Druckregelventils 135 werden als Hochdruckbereich bezeichnet. In diesem Bereich steht der Kraftstoff unter hohem Druck. Der Druck im Hochdruckbereich wird mittels eines Sensors 140 erfaßt. Die Leitungen zwischen dem Tank 100 und der Hochdruckpumpe 125 werden als Niederdruckbereich bezeichnet.The lines between the outlet of the high pressure pump 125 and the inlet of the pressure control valve 135 are called the high pressure area designated. The fuel is in this area under high pressure. The pressure in the high pressure area will detected by a sensor 140. The lines between the Tank 100 and high pressure pump 125 are called the low pressure area designated.

    Eine Steuerung 160 beaufschlagt die Hochdruckpumpe 125 mit einem Ansteuersignal AP, die Injektoren 131 mit einem Ansteuersignal A und/oder das Druckablaßventil 135 mit Ansteuersignal AV. Die Steuerung 160 verarbeitet verschiedene Signale verschiedener Sensoren 165, die den Betriebszustand der Brennkraftmaschine und/oder des Kraftfahrzeugs, daß die Brennkraftmaschine antreibt, charakterisieren. Ein solcher Betriebszustand ist beispielsweise die Drehzahl N der Brennkraftmaschine. A controller 160 acts on the high-pressure pump 125 a control signal AP, the injectors 131 with a control signal A and / or the pressure relief valve 135 with control signal AV. The controller 160 processes various signals various sensors 165, which determine the operating state the internal combustion engine and / or the motor vehicle that the Internal combustion engine drives, characterize. Such a The operating state is, for example, the speed N of the internal combustion engine.

    Diese Einrichtung arbeitet wie folgt: Der Kraftstoff, der sich im Vorratsbehälter befindet, wird von der Vorförderpumpe 110 durch die Filtermittel 105 und 115 gefördert.This device works as follows: The fuel, the is in the reservoir, is from the feed pump 110 promoted by the filter means 105 and 115.

    Steigt der Druck im Niederdruckbereich auf unzulässig hohe Werte an, so öffnet das Niederdruckbegrenzungsventil 145 und gibt die Verbindung zwischen dem Ausgang der Vorförderpumpe 110 und dem Vorratsbehälter 100 frei.If the pressure in the low pressure range rises to an impermissibly high level Values, the low pressure relief valve 145 and opens gives the connection between the output of the pre-feed pump 110 and the reservoir 100 free.

    Die Hochdruckpumpe 125 fördert die Kraftstoffmenge Q1 vom Niederdruckbereich in den Hochdruckbereich. Die Hochdruckpumpe 125 baut im Rail 130 einen sehr hohen Druck auf. Üblicherweise werden bei Systemen für fremdgezündete Brennkraftmaschinen Druckwerte von etwa 30 bis 100 bar und bei selbstzündenden Brennkraftmaschinen Druckwerte von etwa 1000 bis 2000 bar erzielt. Über die Injektoren 131 kann der Kraftstoff unter hohem Druck den einzelnen Zylindern der Brennkraftmaschine zugemessen werden.The high pressure pump 125 delivers the amount of fuel Q1 from Low pressure area in the high pressure area. The high pressure pump 125 builds up a very high pressure in the Rail 130. Usually are in systems for spark ignition internal combustion engines Pressure values from about 30 to 100 bar and with auto-igniting Internal combustion pressures from about 1000 to 2000 bar achieved. The fuel can be injected via the injectors 131 under high pressure the individual cylinders of the internal combustion engine be measured.

    Mittels des Sensors 140 wird der Druck P im Rail bzw. im gesamten Hochdruckbereich erfaßt. Mittels der steuerbaren Hochdruckpumpe 125 und/oder des Druckablaßventils 135 wird der Druck im Hochdruckbereich geregelt.By means of the sensor 140, the pressure P in the rail or in the whole High pressure area detected. By means of the controllable High pressure pump 125 and / or the pressure relief valve 135 is the pressure in the high pressure area is regulated.

    Werden als Hochdruckpumpe mechanisch angetriebene Pumpen verwendet, die von der Nocken- oder von der Kurbelwelle der Brennkraftmaschine angetrieben werden, so können harmonische Druckschwingungen, beispielsweise mit Nockenwellenfrequenz oder ganzzahligen Bruchteilen der Nockenwellenfrequenz, auftreten. Zur Kompensation der Auswirkung dieser Druckschwingungen ist erfindungsgemäß vorgesehen, daß das Ausgangssignal des Drucksensors gefiltert und ausgehend von diesem gefilterten Signal ein Korrekturwert zur Korrektur des Sensorsignals gebildet wird. Das so korrigierte Sensorsignal wird zur weiteren Steuerung der Brennkraftmaschine verwendet. Insbesondere wird ausgehend von dem korrigierten Sensorsignal mittels eines Kennfeldes unter Heranziehung der einzuspritzenden Kraftstoffmenge ein Ansteuersignal für die Injektoren gebildet. Insbesondere wird aus dem Kennfeld die Ansteuerdauer für die Injektoren ausgelesen.Are mechanically driven pumps as high pressure pumps used by the camshaft or by the crankshaft of the Internal combustion engine can be driven so harmonic Pressure vibrations, for example with a camshaft frequency or integral fractions of the camshaft frequency. To compensate for the effects of these pressure fluctuations it is provided according to the invention that the output signal filtered by the pressure sensor and based on this filtered signal a correction value for correcting the sensor signal is formed. The sensor signal corrected in this way is used for further control of the internal combustion engine. In particular, based on the corrected sensor signal by means of a map using the fuel quantity to be injected a control signal for the Injectors formed. In particular, the map is the Control duration for the injectors read out.

    Als Filter wird vorzugsweise ein Bandpaß verwendet, dessen Mittenfrequenz der Nockenwellenfrequenz bzw. einem ganzzahligen Bruchteil der Nockenwellenfrequenz entspricht.A bandpass filter is preferably used as the filter Center frequency of the camshaft frequency or an integer Fraction of the camshaft frequency corresponds.

    Eine entsprechende Vorrichtung ist in Figur 2 als Blockdiagramm dargestellt.A corresponding device is shown in FIG. 2 as a block diagram shown.

    Ein erstes Ausgangssignal PT gelangt von dem Sensor 140 mit positiven Vorzeichen zu einem ersten Verknüpfungspunkt 210. Das Ausgangssignal PD des Verknüpfungspunktes 210 gelangt zu einem Filter 200, der widerrum einen ersten Zylinderzähler 220 beaufschlagt. Von dem Zylinderzähler 220 gelangt das Signal wahlweise zu einem der Regler 231, 232, 233 und 234. Die Regler 231 bis 234 sind vorzugsweise als Integralregler ausgebildet. Insbesondere entspricht die Anzahl der Regler der Anzahl der Zylinder der Brennkraftmaschine, wobei jedem Zylinder der Brennkraftmaschine ein Regler zugeordnet ist. In dem dargestellten Ausführungsbeispiel handelt es sich um eine Vier-Zylinder-Brennkraftmaschine, die Erfindung ist aber ohne weiteres auf Brennkraftmaschinen mit anderer Zylinderzahl anwendbar. In diesem Fall ist eine entsprechende Anzahl von Reglern vorzusehen.A first output signal PT arrives at the sensor 140 positive sign for a first node 210. The output signal PD of node 210 arrives at a filter 200, which in turn a first cylinder counter 220 acted upon. The signal comes from the cylinder counter 220 optionally to one of the controllers 231, 232, 233 and 234. The controllers 231 to 234 are preferably integral controllers educated. In particular, the number of controllers corresponds the number of cylinders of the internal combustion engine, each A controller is assigned to the cylinder of the internal combustion engine. In the illustrated embodiment, it is a four-cylinder internal combustion engine, which is invention but without further ado on internal combustion engines with a different number of cylinders applicable. In this case there is a corresponding one Number of controllers.

    Von den Reglern 231 bis 234 gelangt das Signal über einen zweiten Zylinderzähler 240 mit positivem Vorzeichen zu einem zweiten Verknüpfungspunkt 250. Am zweiten Eingang des Verknüpfungspunktes 250 liegt mit positivem Vorzeichen das zweite Ausgangssignal PN des Sensors 140. Das Ausgangssignal PK des zweiten Verknüpfungspunktes 250 gelangt zum einen zu einem Kennfeld 164 und zum anderen mit negativem Vorzeichen zum zweiten Eingang des ersten Verknüpfungspunktes 210. Dem Kennfeld 164 wird ferner ein Signal QK von einer Mengenvorgabe 162 zugeleitet. Das Kennfeld 164 beaufschlagt die Injektoren 131 mit einem Ansteuersignal A.The signal comes from the controllers 231 to 234 via a second cylinder counter 240 with a positive sign to one second node 250. At the second input of the node 250 lies with a positive sign second output signal PN of the sensor 140. The output signal PK of the second connection point 250 on the one hand a map 164 and the other with a negative sign to the second input of the first node 210. The Map 164 also becomes a signal QK from a quantity specification 162 forwarded. The map 164 acts on the injectors 131 with a control signal A.

    Der Sensor 140 stellt ein Signal bereit, das dem Druck im Hochdruckbereich entspricht. Dieses Signal gelangt als erstes Signal PT in festen Zeitabständen zu einem Verknüpfungspunkt 210. Desweiteren gelangt das Ausgangssignal des Sensors als zweites Signal PN in festen Winkelabständen zu dem zweiten Verknüpfungspunkt 250. Dieses zweite Signal, das in bestimmten Winkelabständen ausgelesen wird, dient vorzugsweise zur Berechnung der Ansteuerdauer A der Injektoren.The sensor 140 provides a signal that corresponds to the pressure in the High pressure area corresponds. This signal arrives first Signal PT at fixed time intervals to a node 210. Furthermore, the output signal of the Sensor as a second signal PN at fixed angular intervals the second node 250. This second signal, the reading out at certain angular intervals is preferably used for calculating the control duration A of the injectors.

    Die Erfassung des zweiten Sensorsignals PN erfolgt bei einer bestimmten Winkelstellung der Nocken- bzw. der Kurbelwelle. Dabei erfolgt die Erfassung in der Regel bei der gleichen Winkelstellung der Kurbel- bzw. der Nockenwelle. Das erste Signal PT wird in wesentlich kleineren Abständen erfaßt. Vorzugsweise wird dieses Signal in konstanten Zeitabständen weitergegeben, wobei pro Zumessung das Signal mehrmals ausgegeben wird, vorzugsweise wird es in einem 1 ms-Raster ausgegeben.The second sensor signal PN is detected at a certain angular position of the camshaft or crankshaft. As a rule, the data is recorded at the same one Angular position of the crankshaft or camshaft. The first Signal PT is recorded at much smaller intervals. This signal is preferably at constant time intervals passed on, the signal being output several times per metering is preferably output in a 1 ms grid.

    Im Verknüpfungspunkt 210 werden die beiden Signale PT und PN verglichen, wobei das zweite Signal PN mittels eines Korrekturwerts K korrigierbar ist. Diese so gebildete Differenz PD der beiden Signale wird von dem Filter 200 gefiltert. Bei dem Filter 200 handelt es sich vorzugsweise um einen Bandpaß mit einer Mittenfrequenz, die der Frequenz entspricht, mit der die Druckschwingungen auftreten. Dies bedeutet, die Mittenfrequenz entspricht der Nockenwellenfrequenz bzw. ganzzahligen Bruchteilen der Nockenwellenfrequenz. At node 210, the two signals PT and PN compared, the second signal PN using a correction value K is correctable. This difference PD thus formed of the two signals is filtered by the filter 200. At the filter 200 is preferably a bandpass filter with a center frequency that corresponds to the frequency with which the pressure vibrations occur. This means the center frequency corresponds to the camshaft frequency or integer Fractions of the camshaft frequency.

    Über den Zylinderzähler 220 gelangt das so gefilterte Signal zu einem der Regler 231 bis 234. Dabei ist vorgesehen, daß jedem Zylinder ein Regler zugeordnet ist. Das Ausgangssignal des Reglers, der die gefilterte Differenz PD aufsummiert, gelangt als Korrekturwert K zu dem zweiten Verknüpfungspunkt, wo dem zweiten Sensorssignal PN dieser Wert K additiv überlagert wird. Das so korrigierte Sensorsignal gelangt zum einen zum Kennfeld, wo es zur weiteren Steuerung der Brennkraftmaschine, insbesondere der Bestimmung der Ansteuerdauer verwendet wird. Weiterhin wird das so korrigierte Signal im Verknüpfungspunkt 210 mit dem ersten Signal verglichen.The signal filtered in this way passes through the cylinder counter 220 to one of the controllers 231 to 234. It is provided that a controller is assigned to each cylinder. The output signal of the controller, which adds up the filtered difference PD, arrives at the second connection point as correction value K, where this value K is additive to the second sensor signal PN is superimposed. The sensor signal corrected in this way reaches the one to the map, where there is further control of the internal combustion engine, in particular the determination of the activation duration is used. Furthermore, the signal corrected in this way Junction point 210 compared to the first signal.

    Dies bedeutet, die Korrekturwerte K für die einzelnen Zylinder sind so gebildet, daß die harmonischen Druckschwingungen ausgeglichen werden, d.h. die Differenz zwischen dem winkelsynchron und dem zeitsynchron erfaßten Signal wird zu Null. Dies hat zur Folge, daß die Druckschwingungen sich nicht auf die Werte des Signals PN auswirken. Dies bedeutet, daß die Druckschwingungen keinen Einfluß auf die Ansteuerdauer und damit auf die eingespritzte Kraftstoffmenge haben.This means the correction values K for the individual cylinders are formed so that the harmonic pressure vibrations be balanced, i.e. the difference between the angularly synchronous and the time-synchronized signal becomes zero. This has the consequence that the pressure vibrations do not affect the values of the signal PN. This means that the Pressure vibrations have no influence on the control duration and to have the amount of fuel injected.

    Claims (7)

    Verfahren zur Steuerung einer Brennkraftmaschine, insbesondere einer Brennkraftmaschine mit einem Common-Rail-System, bei dem wenigstens eine Pumpe Kraftstoff in einen Druckspeicher fördert, wobei ein Sensorsignal erfaßt wird, das den Kraftstoffdruck im Druckspeicher charakterisiert, dadurch gekennzeichnet, daß ausgehend von einem gefilterten Sensorsignal ein Korrekturwert zur Korrektur des Sensorsignals vorgebbar ist.Method for controlling an internal combustion engine, in particular an internal combustion engine with a common rail system, at least one pump fuel into one Pressure accumulator promotes, with a sensor signal detected that characterizes the fuel pressure in the pressure accumulator, characterized in that starting from a filtered sensor signal a correction value for correction of the sensor signal can be predetermined. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß in festen Zeitabständen ein erstes Sensorsignal und in festen Winkelabständen ein zweites Sensorsignal erfaßt wird.A method according to claim 1, characterized in that in fixed time intervals a first sensor signal and in fixed Angular distances detected a second sensor signal becomes. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das erste Sensorsignal gefiltert und das zweite Sensorsignal korrigiert wird.A method according to claim 1 or 2, characterized in that that the first sensor signal is filtered and the second sensor signal is corrected. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das korrigierte Sensorsignal zur weiteren Steuerung der Brennkraftmaschine verwendet wird. Method according to one of the preceding claims, characterized characterized in that the corrected sensor signal used for further control of the internal combustion engine becomes. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das korrigierte Sensorsignal zur Bestimmung einer die einzuspritzende Kraftstoffmenge charakterisierenden Größe verwendet wird.Method according to one of the preceding claims, characterized characterized in that the corrected sensor signal for determining a fuel quantity to be injected characterizing size is used. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als Filter wenigstens ein Bandpaß verwendet wird, der eine Mittenfrequenz aufweist, die wenigstens einem ganzzahligen Bruchteil der Nockenwellenfrequenz entspricht.Method according to one of the preceding claims, characterized characterized in that at least one bandpass filter is used that has a center frequency that at least an integer fraction of the camshaft frequency corresponds. Vorrichtung zur Steuerung einer Brennkraftmaschine, insbesondere einer Brennkraftmaschine mit einem Common-Rail-System, mit wenigstens einer Pumpe, die Kraftstoff in einen Druckspeicher fördert, mit Mitteln, die ein Sensorsignal erfassen, das den Kraftstoffdruck im Druckspeicher charakterisiert, dadurch gekennzeichnet, daß Mittel vorgesehen sind, die ausgehend von einem gefilterten Sensorsignal ein Korrekturwert zur Korrektur des Sensorsignals vorgeben.Device for controlling an internal combustion engine, in particular an internal combustion engine with a common rail system, with at least one pump that pumps fuel into one Pressure accumulator promotes, by means of a sensor signal record that the fuel pressure in the accumulator characterized, characterized in that means are provided are based on a filtered sensor signal a correction value for correcting the sensor signal pretend.
    EP00120364A 1999-10-12 2000-09-16 Method and device for controlling an internal combustion engine Expired - Lifetime EP1092858B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19948971 1999-10-12
    DE19948971A DE19948971A1 (en) 1999-10-12 1999-10-12 Method and device for controlling an internal combustion engine

    Publications (3)

    Publication Number Publication Date
    EP1092858A2 true EP1092858A2 (en) 2001-04-18
    EP1092858A3 EP1092858A3 (en) 2002-07-03
    EP1092858B1 EP1092858B1 (en) 2005-11-30

    Family

    ID=7925251

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00120364A Expired - Lifetime EP1092858B1 (en) 1999-10-12 2000-09-16 Method and device for controlling an internal combustion engine

    Country Status (4)

    Country Link
    US (1) US6446605B1 (en)
    EP (1) EP1092858B1 (en)
    JP (1) JP2001132499A (en)
    DE (2) DE19948971A1 (en)

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10061705C1 (en) * 2000-12-12 2002-10-10 Bosch Gmbh Robert Operation of a fuel dosing system of an internal combustion engine uses a pressure regulator to dampen pressure vibrations in an accumulator caused by disturbance variables having a direct influence on the regulation of injection pressure
    US6718948B2 (en) * 2002-04-01 2004-04-13 Visteon Global Technologies, Inc. Fuel delivery module for petrol direct injection applications including supply line pressure regulator and return line shut-off valve
    JP2004183550A (en) * 2002-12-03 2004-07-02 Isuzu Motors Ltd Filter treating device for common-rail pressure detection value and common-rail type fuel injection controller
    FR2927174B1 (en) * 2008-02-05 2010-02-12 Renault Sas METHOD FOR DETECTING ELECTRIC MICROCOUPURES AND MANAGING THE OPERATION OF AN ENGINE
    DE102019206482A1 (en) * 2019-05-06 2020-11-12 Robert Bosch Gmbh Method for determining a fuel pressure in a high-pressure accumulator for equidistant crankshaft angle positions
    DE102019212275A1 (en) 2019-08-15 2021-02-18 Volkswagen Aktiengesellschaft Method for adapting a detected camshaft position, control unit for carrying out the method, internal combustion engine and vehicle

    Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPH0658231A (en) * 1992-08-03 1994-03-01 Toyota Motor Corp Fuel injection device
    US5305723A (en) * 1992-08-27 1994-04-26 Mitsubishi Denki Kabushiki Kaisha Control apparatus for internal combustion engine
    EP0725212A2 (en) * 1995-02-06 1996-08-07 Zexel Corporation High-pressure fuel injection system
    DE19727204A1 (en) * 1997-06-26 1999-01-07 Bosch Gmbh Robert Device for detecting a faulty signal
    GB2331597A (en) * 1997-11-24 1999-05-26 Siemens Ag Regulating pressure in a common-rail fuel injection system
    DE19857971A1 (en) * 1998-12-16 2000-06-21 Bosch Gmbh Robert Controlling an IC engine esp. for IC engine with common rail fuel injection system so that at least one pump delivers fuel in storage
    DE19857972A1 (en) * 1998-12-16 2000-06-21 Bosch Gmbh Robert Method and device for controlling an internal combustion engine

    Family Cites Families (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPH0569374U (en) * 1992-02-28 1993-09-21 富士重工業株式会社 In-cylinder direct injection engine abnormality warning device
    US5531111A (en) * 1994-04-28 1996-07-02 Nippondenso Co., Ltd. Structure of a volumetric measuring apparatus
    US5609136A (en) * 1994-06-28 1997-03-11 Cummins Engine Company, Inc. Model predictive control for HPI closed-loop fuel pressure control system
    US5445129A (en) * 1994-07-29 1995-08-29 Caterpillar Inc. Method for controlling a hydraulically-actuated fuel injection system
    DE19548278B4 (en) 1995-12-22 2007-09-13 Robert Bosch Gmbh Method and device for controlling an internal combustion engine
    DE19735561B4 (en) * 1997-08-16 2007-12-20 Robert Bosch Gmbh Method and device for controlling an internal combustion engine
    WO1999047802A1 (en) * 1998-03-16 1999-09-23 Siemens Aktiengesellschaft Method for determining the injection time in a direct injection internal combustion engine

    Patent Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPH0658231A (en) * 1992-08-03 1994-03-01 Toyota Motor Corp Fuel injection device
    US5305723A (en) * 1992-08-27 1994-04-26 Mitsubishi Denki Kabushiki Kaisha Control apparatus for internal combustion engine
    EP0725212A2 (en) * 1995-02-06 1996-08-07 Zexel Corporation High-pressure fuel injection system
    DE19727204A1 (en) * 1997-06-26 1999-01-07 Bosch Gmbh Robert Device for detecting a faulty signal
    GB2331597A (en) * 1997-11-24 1999-05-26 Siemens Ag Regulating pressure in a common-rail fuel injection system
    DE19857971A1 (en) * 1998-12-16 2000-06-21 Bosch Gmbh Robert Controlling an IC engine esp. for IC engine with common rail fuel injection system so that at least one pump delivers fuel in storage
    DE19857972A1 (en) * 1998-12-16 2000-06-21 Bosch Gmbh Robert Method and device for controlling an internal combustion engine

    Also Published As

    Publication number Publication date
    DE19948971A1 (en) 2001-04-19
    JP2001132499A (en) 2001-05-15
    EP1092858A3 (en) 2002-07-03
    EP1092858B1 (en) 2005-11-30
    DE50011741D1 (en) 2006-01-05
    US6446605B1 (en) 2002-09-10

    Similar Documents

    Publication Publication Date Title
    DE19712143C2 (en) Method and device for controlling an internal combustion engine
    EP0795077B1 (en) Process and device for monitoring a fuel metering system
    EP1255926B1 (en) Method and device for calibrating a pressure sensor
    DE102007028900B4 (en) Method and device for diagnosing an injection valve of an internal combustion engine that is in communication with a fuel rail
    DE102004056893A1 (en) Device and method for determining pressure fluctuations in a fuel supply system
    DE102006043326A1 (en) Internal combustion engine e.g. diesel engine, controlling method for e.g. motor vehicle, involves varying temporal hydraulic distance between partial injections by proximate injecting process
    EP2142785B1 (en) Method and device for controlling injection in an internal combustion engine
    EP0857867A1 (en) Method and apparatus for detecting leaks
    DE102017217113A1 (en) Method for operating an internal combustion engine and electronic control unit for an internal combustion engine
    WO2013034479A1 (en) Method for analyzing the efficiency of the high-pressure pump of a fuel injection system
    DE19620038B4 (en) Method and device for monitoring a fuel metering system
    DE19857971A1 (en) Controlling an IC engine esp. for IC engine with common rail fuel injection system so that at least one pump delivers fuel in storage
    EP1092858B1 (en) Method and device for controlling an internal combustion engine
    DE102006042098B3 (en) Method for determining a correction of a partial injection quantity of an internal combustion engine
    DE19614884A1 (en) Control method and device for fuel-injected IC engine
    DE19735561B4 (en) Method and device for controlling an internal combustion engine
    DE102016214464A1 (en) Method for determining a correction value for a fuel metering of a fuel injector
    DE102008001180B4 (en) Method for controlling an internal combustion engine
    DE102004007048A1 (en) Method and device for controlling an internal combustion engine
    DE102005014161B4 (en) Method and device for determining the fuel pressure values of a high-pressure fuel system
    DE102017004895B4 (en) Method for monitoring a cylinder pressure sensor
    DE102011005981B4 (en) Method for determining a change in a control amount of an injector of an internal combustion engine
    DE102017206416B3 (en) Method for determining a permanently injecting combustion chamber, injection system and internal combustion engine with such an injection system
    DE102010040719A1 (en) Combustion engine controlling method, involves determining regression lines in regions, where characteristics for opening and closing valve are determined from points of intersection of regression lines
    DE102013210909A1 (en) Method for checking the plausibility of a rail pressure sensor

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A2

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    PUAL Search report despatched

    Free format text: ORIGINAL CODE: 0009013

    AK Designated contracting states

    Kind code of ref document: A3

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 20030103

    AKX Designation fees paid

    Designated state(s): DE FR GB

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE FR GB

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REF Corresponds to:

    Ref document number: 50011741

    Country of ref document: DE

    Date of ref document: 20060105

    Kind code of ref document: P

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20060309

    ET Fr: translation filed
    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20060831

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20130920

    Year of fee payment: 14

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20130918

    Year of fee payment: 14

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20140916

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20150529

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140916

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140930

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20151125

    Year of fee payment: 16

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R119

    Ref document number: 50011741

    Country of ref document: DE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20170401