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DE102008052061A1 - Method for correction of fuel consumption signal of control of internal combustion engine of motor vehicle, involves receiving correction factor as correction value in display such that corrected fuel consumption signal is obtained - Google Patents

Method for correction of fuel consumption signal of control of internal combustion engine of motor vehicle, involves receiving correction factor as correction value in display such that corrected fuel consumption signal is obtained Download PDF

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Publication number
DE102008052061A1
DE102008052061A1 DE102008052061A DE102008052061A DE102008052061A1 DE 102008052061 A1 DE102008052061 A1 DE 102008052061A1 DE 102008052061 A DE102008052061 A DE 102008052061A DE 102008052061 A DE102008052061 A DE 102008052061A DE 102008052061 A1 DE102008052061 A1 DE 102008052061A1
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DE
Germany
Prior art keywords
fuel consumption
correction
consumption signal
signal
display
Prior art date
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DE102008052061A
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German (de)
Inventor
Alexander Kegel
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Priority to DE102008052061A priority Critical patent/DE102008052061A1/en
Publication of DE102008052061A1 publication Critical patent/DE102008052061A1/en
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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
    • F02D41/38—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
    • 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
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1458—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with determination means using an estimation
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors
    • 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
    • F02D2200/0614—Actual fuel mass or fuel injection amount
    • F02D2200/0616—Actual fuel mass or fuel injection amount determined by estimation
    • 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
    • F02D2200/0625—Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
    • 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

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

Abstract

The method involves determining an actual fuel amount based on actual operating parameters (10) e.g. temperature, pressure and load. The actual fuel amount is output corresponding to control units of injection nozzles (13), where comparison of an air mass signal with a reference signal stored in a memory for a defined operating condition is executed. An adaptive correction factor is determined from the comparison of the air mass signal. The correction factor is received as a correction value in a display such that a corrected fuel consumption signal is obtained.

Description

Die Erfindung betrifft die Adaption und Korrektur eines Kraftstoffverbrauchssignals für eine Motorsteuerung mit den Merkmalen des unabhängigen Anspruchs.The The invention relates to the adaptation and correction of a fuel consumption signal for a motor controller with the features of the independent claim.

Aus der EP 1 315 894 B1 ist bereits ein Verfahren zur Gemischadaption bei Verbrennungsmotoren mit Benzindirekteinspritzung bekannt. Bei diesem bekannten Verfahren wird eine Kompensation von Fehlanpassungen der Vorsteuerung einer Kraftstoffzumessung für ein Verbrennungsmotor beschrieben. Dieser bekannte Stand der Technik geht davon aus, dass bei der Regelung der Kraftstoff-Luftverhältnisse für Verbrennungsmotoren eine Vorsteuerung mit einer Regelung zu überlagern ist. Hierbei werden veränderte Betriebsbedingungen kompensiert. Diese Kompensation, welche auch als Adaption bezeichnet wird, erfolgt in verschiedenen Bereichen des Last-Drehzahl-Spektrums eines Verbrennungsmotors.From the EP 1 315 894 B1 A method for mixture adaptation in internal combustion engines with gasoline direct injection is already known. In this known method, a compensation of mismatches of pilot control of fuel metering for an internal combustion engine is described. This known prior art assumes that in the regulation of the air-fuel ratios for internal combustion engines, a pilot control is to be superimposed with a control. Here, changed operating conditions are compensated. This compensation, which is also referred to as adaptation, takes place in different areas of the load-speed spectrum of an internal combustion engine.

Die tatsächlich eingespritzte Kraftstoffmenge kann in einem System ohne Durchflussmesstechnik nicht erfasst, sondern lediglich berechnet werden. Alle Toleranzen zwischen der berechneter oder der tatsächlich eingespritzten Kraftstoffmenge gehen als Anzeigefehler ins Anzeigeinstrument ein.The actually injected fuel quantity can be in one System without flowmeter not detected, but only be calculated. All tolerances between the calculated or the amount of fuel actually injected will be a display error in the display instrument.

Aufgrund der nicht eindeutigen Bestimmung der Kraftstoffmasse ist auch die Anzeige des Kraftstoffverbrauchssignals für den Fahrer des Kraftfahrzeugs ebenfalls nicht exact darstellbar, also fehlerbehaftet.by virtue of the ambiguous determination of the fuel mass is also the Display of the fuel consumption signal for the driver of the motor vehicle also not exactly representable, so faulty.

Üblicherweise existiert pro Abgasbank ein Gemischadaptionsfaktor, welcher evtl. noch in Teil- oder Volllastfaktor unterteilt ist. Die Gemischadaption wird durch den Lambdaregelkreis durchgeführt und kann so in der Kraftstoffvorsteuerung berücksichtigt werden. Fehler in der Anzeige bleiben allerdings bestehen, da durch die Korrektur die Kraftstoff-Soll-Menge zwar angepasst wird, aber dennoch entsprechend zur Kraftstoff-Ist-Menge differiert.Usually exists per exhaust bank, a mixture adaptation factor, which may. is still divided into partial load or full load factor. The mixture adaptation becomes performed by the lambda control loop and can be so in be taken into account the fuel feedforward. error however, the ad will persist because of the correction Although the fuel target quantity is adjusted, but still accordingly differs to the fuel actual quantity.

Ausgehend von dieser Diskrepanz war ein Verfahren zu ermitteln, dass eine möglichst exakte Anzeige des aktuellen Kraftstoffverbrauchs zur Verfügung stellt.outgoing from this discrepancy was a procedure to determine that a as accurate as possible display of the current fuel consumption provides.

Diese Aufgabe wird mit dem erfindungsgemäßen Verfahren gemäß der Merkmale des unabhängigen Anspruchs gelöst.These Task is with the inventive method according to the features of the independent claim solved.

Das erfindungsgemäße Verfahren hat den Vorteil, dass aus dem Gemisch-Adaptionsfaktor der Fehler des Luftpfades eliminiert wird, indem ein Abgleich des Luftmassensignals mit einem Referenzsignal durchgeführt wird.The inventive method has the advantage that from the mixture adaptation factor eliminates the error of the air path by comparing the air mass signal with a reference signal is carried out.

Mit dem Lösungsansatz, den Gemisch-Adaptionsfaktor in Luft- und Kraftstoffpfad aufzuteilen, wird sichergestellt, dass der Adaptionsanteil des Kraftstoffes als adaptiver Korrekturfaktor im angezeigten Kraftstoffverbrauchsignal direkt berücksichtigt werden kann. Damit ist eine qualitativ bessere Anzeige möglich.With the solution approach, the mixture adaptation factor in air and split fuel path, it is ensured that the adaptation component of the fuel as an adaptive correction factor in the indicated fuel consumption signal can be considered directly. This is a qualitative better display possible.

Das erfindungsgemäße Verfahren ist in der Figur dargestellt und in der nachfolgenden Beschreibung näher erläutert.The inventive method is shown in the figure and explained in more detail in the following description.

So zeigt die Figur eine Prinzipübersicht über die Bestimmung der Einspritzmenge und der Anzeige im Kombiinstrument.So the figure shows a schematic overview of the Determining the injection quantity and the display in the instrument cluster.

In der Figur sind mit dem Bezugszeichen 10 die Einflussgrößen für das Festlegen der Kraftstoffsollmasse dargestellt. Diese Einflussgrößen 10 sind z. B. Temperatur, Druck, Last, Drehzahl oder weitere Betriebsgrößen. Aus diesen Betriebsgrößen wird in einem Schritt 11 die Soll-Kraftstoffmenge für den Motor berechnet.In the figure, the reference numeral 10 the factors influencing the setting of the nominal fuel mass are shown. These factors 10 are z. As temperature, pressure, load, speed or other operating variables. From these operating variables is in one step 11 calculates the target fuel quantity for the engine.

Ausgehend von der berechneten Sol-Kraftstoffmenge wird die Einspritzzeit für die berechnete Soll-Kraftstoffmenge mittels einer abgelegten Injektorkennlinie 12 festgelegt und an eine Stellgröße ausgegeben. Entsprechend der Injektorkennlinie 12, welche die konstruktiven Gegebenheiten des Stellgliedes und damit der Einspritzdüse beachtet sowie der Kenntnis der Soll-Kraftstoffmenge wird die Einspritzzeit Ti bestimmt.Based on the calculated sol-fuel quantity, the injection time for the calculated target fuel quantity by means of a stored injector characteristic 12 determined and output to a manipulated variable. According to the injector characteristic 12 , which observes the structural conditions of the actuator and thus the injector and the knowledge of the desired fuel quantity, the injection time Ti is determined.

Im Ausführungsbeispiel ist die Einspritzdüse mit dem Bezugszeichen 13 versehen und wird entsprechend der bestimmten Einspritzzeit Ti angesteuert.In the exemplary embodiment, the injection nozzle is denoted by the reference numeral 13 provided and is driven according to the specific injection time Ti.

In der Figur ist der Luftpfad 20 und der Kraftstoffpfad 21 von einem gestrichelten Kasten 30 umschlossen. Diese Zusammenfassung im Kasten 30 gibt die Summe der Gemischadaptionsfaktoren an. Bei der vorliegenden Erfindung soll der in 30 bestimmte Kraftstoff-Luft-Gemischfaktor um den Fehler des Luftpfades 20 korrigiert werden. Hierfür wird in einem definierten Betriebszustand also beispielsweise bei konstanter Drosselklappe und in einem vorgebbaren Drehzahlfenster ein Vergleich von Luftmassenmodell bzw. Saugrohrdruckmodell durchgeführt, um den Kraftstoffpfad 20 aus der Gesamtposition zu ermitteln. Dabei wird das aktuelle Signal des Arbeitsschrittes 12 mit dem für diesen Betriebszustand hinterlegten Referenzsignal verglichen und aufgrund dieses Vergleichs ein Korrekturwert bestimmt, welcher sich an Veränderungen z. B. über die Laufzeit der realen Injektorkennlinie von 13 optimiert.In the figure is the air path 20 and the fuel path 21 from a dashed box 30 enclosed. This summary in the box 30 gives the sum of the mixture adaptation factors. In the present invention, the in 30 certain fuel-air mixture factor around the error of the air path 20 Getting corrected. For this purpose, in a defined operating state, that is, for example, with a constant throttle valve and in a predeterminable speed window, a comparison of air mass model or intake manifold pressure model is carried out to the fuel path 20 to determine from the overall position. This is the current signal of the work step 12 compared with the stored for this operating condition reference signal and determined on the basis of this comparison, a correction value, which is responsive to changes z. B. over the term of the real injector characteristic of 13 optimized.

Die hinterlegten Referenzsignale werden entsprechend den Betriebsbedingungen in einem Arbeitsschritt 16 bereitgestellt und im Arbeitsschritt 15, wie bereits erläutert, zur Bestimmung des Korrekturwertes und Richtigstellung der Anzeige genutzt. Die Anzeige im Kombiinstrument 17 wird für den aktuellen Kraftstoffverbrauch um diesen Korrekturwert richtig gestellt.The stored reference signals are in accordance with the operating conditions in an Ar beitsschritt 16 provided and in the work step 15 as already explained, used to determine the correction value and correct the display. The display in the instrument cluster 17 is corrected for the current fuel consumption by this correction value.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - EP 1315894 B1 [0002] - EP 1315894 B1 [0002]

Claims (2)

Verfahren zur Korrektur des Kraftstoffverbrauchsignals einer Motorsteuerung, wobei aufgrund der aktuellen Betriebsgrößen eine aktuelle Kraftstoffmenge bestimmt und entsprechend an die Stellglieder der Einspritzdüsen ausgegeben wird, wobei ein Abgleich eines Luftmassensignals mit einem Referenzsignal, welches in einem Speicher für einen definierten Betriebszustand hinterlegt ist, durchgeführt wird, und wobei aus dem Vergleich des aktuellen Luftmassensignals mit dem Referenzsignal ein adaptiver Korrekturfaktor bestimmt wird, welcher bei der Anzeige des aktuellen Kraftstoffverbrauchssignals berücksichtigt wird und als Korrekturwert in der Anzeige in der Art eingeht, dass das korrigierte Kraftstoffverbrauchssignal angezeigt wird.Method for correcting the fuel consumption signal a motor control, wherein due to the current operating variables determines an actual amount of fuel and accordingly to the actuators the injectors is output, with a balance an air mass signal with a reference signal, which in a Memory for a defined operating state deposited is, is performed, and where from the comparison of current air mass signal with the reference signal an adaptive Correction factor is determined which in the display of the current Fuel consumption signal is taken into account and as Correction value in the display is received in the way that the corrected Fuel consumption signal is displayed. Korrektur des Kraftstoffverbrauchsignals nach Anspruch 1, dadurch gekennzeichnet, dass der adaptive Korrekturwert auch bei der Bestimmung der Einspritzzeit berücksichtigt wird.Correction of the fuel consumption signal according to claim 1, characterized in that the adaptive correction value also is taken into account in determining the injection time.
DE102008052061A 2008-10-17 2008-10-17 Method for correction of fuel consumption signal of control of internal combustion engine of motor vehicle, involves receiving correction factor as correction value in display such that corrected fuel consumption signal is obtained Withdrawn DE102008052061A1 (en)

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DE102008052061A DE102008052061A1 (en) 2008-10-17 2008-10-17 Method for correction of fuel consumption signal of control of internal combustion engine of motor vehicle, involves receiving correction factor as correction value in display such that corrected fuel consumption signal is obtained

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762186A (en) * 2016-12-29 2017-05-31 沪东重机有限公司 The application process of two-stroke low speed diesel engine multi-mode fuel oil optimization peculiar to vessel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245546A1 (en) * 1982-12-09 1984-06-14 Bosch und Pierburg System oHG, 4040 Neuss Device for determining the instantaneous fuel consumption of internal combustion engines
DE19612062A1 (en) * 1996-03-27 1997-10-02 Bayerische Motoren Werke Ag Display unit for data dependent on the energy consumption of a vehicle
DE10146318A1 (en) * 2001-09-20 2003-04-10 Bosch Gmbh Robert Method for determining fuel consumption values and control device for an internal combustion engine
DE102004044463A1 (en) * 2004-03-05 2005-09-22 Robert Bosch Gmbh Control method for internal combustion engine, involves utilizing output signal of at least one of characteristics map and closed loop control as correction value for fuel and air signals
EP1315894B1 (en) 2000-09-01 2005-12-07 Robert Bosch Gmbh Mixture adaptation method for internal combustion engines with direct gasoline injection
JP2006242896A (en) * 2005-03-07 2006-09-14 Fuji Heavy Ind Ltd Fuel consumption display for vehicle
DE102007045642A1 (en) * 2007-09-25 2009-04-02 Robert Bosch Gmbh Method for operating an internal combustion engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245546A1 (en) * 1982-12-09 1984-06-14 Bosch und Pierburg System oHG, 4040 Neuss Device for determining the instantaneous fuel consumption of internal combustion engines
DE19612062A1 (en) * 1996-03-27 1997-10-02 Bayerische Motoren Werke Ag Display unit for data dependent on the energy consumption of a vehicle
EP1315894B1 (en) 2000-09-01 2005-12-07 Robert Bosch Gmbh Mixture adaptation method for internal combustion engines with direct gasoline injection
DE10146318A1 (en) * 2001-09-20 2003-04-10 Bosch Gmbh Robert Method for determining fuel consumption values and control device for an internal combustion engine
DE102004044463A1 (en) * 2004-03-05 2005-09-22 Robert Bosch Gmbh Control method for internal combustion engine, involves utilizing output signal of at least one of characteristics map and closed loop control as correction value for fuel and air signals
JP2006242896A (en) * 2005-03-07 2006-09-14 Fuji Heavy Ind Ltd Fuel consumption display for vehicle
DE102007045642A1 (en) * 2007-09-25 2009-04-02 Robert Bosch Gmbh Method for operating an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762186A (en) * 2016-12-29 2017-05-31 沪东重机有限公司 The application process of two-stroke low speed diesel engine multi-mode fuel oil optimization peculiar to vessel

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Owner name: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT, 7, DE

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