EP0798456A2 - Method of operation of an internal combustion engine using a control apparatus - Google Patents

Method of operation of an internal combustion engine using a control apparatus Download PDF

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Publication number
EP0798456A2
EP0798456A2 EP97102393A EP97102393A EP0798456A2 EP 0798456 A2 EP0798456 A2 EP 0798456A2 EP 97102393 A EP97102393 A EP 97102393A EP 97102393 A EP97102393 A EP 97102393A EP 0798456 A2 EP0798456 A2 EP 0798456A2
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EP
European Patent Office
Prior art keywords
performance data
stored
control device
internal combustion
combustion engine
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
EP97102393A
Other languages
German (de)
French (fr)
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EP0798456B1 (en
EP0798456A3 (en
Inventor
Franz Gumpinger
Hans Hohenner
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Publication of EP0798456A2 publication Critical patent/EP0798456A2/en
Publication of EP0798456A3 publication Critical patent/EP0798456A3/en
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Publication of EP0798456B1 publication Critical patent/EP0798456B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • 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
    • 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
    • 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
    • F02D41/2496—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories the memory being part of a closed loop
    • 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
    • F02D41/2487—Methods for rewriting

Definitions

  • the invention relates to a method with the features of the preamble of claim 1.
  • the invention has for its object to provide a method of the type mentioned, with the help of which the change in the target performance data can be determined in a simple manner.
  • the vehicle user By saving the actual performance data if these deviate from the target performance data, it is readily possible to prove that the target performance data has changed.
  • the vehicle user also has the opportunity to provide proof that, for example, his target performance data has not changed and can then prove his legitimate claims against the vehicle manufacturer or the insurance company.
  • the possibility of changing the performance data which cannot be completely ruled out without the influence and intervention of the vehicle user, for example when replacing the control device and a workshop error, can also be easily carried out for the vehicle user.
  • the subsequent owner In the event of a change of ownership, the subsequent owner is able to recognize a possible excessive stress on the internal combustion engine on the basis of the stored actual performance data. He can then refrain from buying the vehicle, for example.
  • the previous user can provide evidence of the proper operation of the internal combustion engine on the basis of non-stored actual performance data. To a certain extent, the buyer of a vehicle thus has the security of purchasing an internal combustion engine with a normal service life.
  • the information on the temporal effectiveness in particular the day, month and / or year, provides a good measure of the extent to which the internal combustion engine has been excessively loaded.
  • Other ways of providing information in this regard are to record the mileage with which the vehicle was operated with the changed actual performance data.
  • the storage of the actual performance data within the control device makes it possible to carry out the comparison of target and actual performance data using the control device itself.
  • the redundant storage at a point outside the control device makes it possible, even when the control device is exchanged, to be able to unequivocally determine any misuse or even a change in the target performance data.
  • target performance data can also be stored with the associated actual data. If the manipulation is not done by a changed software program, but by Grease ", ie by changing the intake air temperature sensor resistance value, this can be done by comparing the intake air and the outside temperature in a stable state of the vehicle, for example at a vehicle speed above 20 km / h. Both temperature signals are available via an internal data bus Implausibility can be documented in the additional memory.
  • the control device is provided with a vehicle-specific identifier, for example in the form of the chassis number.
  • This identifier can also be stored in an additional memory, for example the memory of another control device.
  • the control device is used, for example, in the context of an electronic immobilizer. Each time the vehicle is started, the identifier stored there is compared with the current value of the identifier in the control device. If there is a mismatch, the vehicle can be prevented from starting, for example, or the discrepancy can be documented.
  • This identifier like the target performance data, can also be stored in another memory once more. This increases the protection against improper simultaneous exchange of the control device and the control device containing the additional memory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Abstract

The engine operating method uses a control device with an electronic memory holding the ideal performance data for the engine, compared with the actual performance data, to allow the stored data to be updated. The performance data may be stored in the memory together with corresponding date information, with redundant storage of the ideal performance data outside the control device. The vehicle identification data may also be stored by the control device.

Description

Die Erfindung bezieht sich auf ein Verfahren mit den Merkmalen des Oberbegriffs von Patentanspruch 1.The invention relates to a method with the features of the preamble of claim 1.

Bei Steuereinrichtungen für moderne Brennkraftmaschine ist es grundsätzlich möglich, die Soll-Leistungsdaten zu verändern. Dies geschieht beispielsweise im Rahmen von Service-Maßnahmen. Damit aber läßt sich die Gefahr einer Veränderung der Soll-Leistungsdaten ohne die Kontrolle des Fahrzeugherstellers nicht ausschließen. Erfolgt diese Veränderung unsachgemäß, so besteht die Gefahr von Überlastungen der Brennkraftmaschine mit der Folge, von Maschinenschäden. Der Nutzer eines derartigen Fahrzeugs läuft ferner Gefahr, die Betriebserlaubnis oder den Versicherungsschutz für das Fahrzeug zu verlieren.In the case of control devices for modern internal combustion engines, it is fundamentally possible to change the target performance data. This happens, for example, as part of service measures. However, the risk of a change in the target performance data cannot be ruled out without the control of the vehicle manufacturer. If this change is carried out improperly, there is a risk of overloading the internal combustion engine, resulting in machine damage. The user of such a vehicle also runs the risk of losing the operating license or insurance coverage for the vehicle.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit dessen Hilfe die Veränderung der Soll-Leistungsdaten auf einfache Weise feststellbar ist.The invention has for its object to provide a method of the type mentioned, with the help of which the change in the target performance data can be determined in a simple manner.

Die Erfindung löst diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1.The invention solves this problem by the characterizing features of patent claim 1.

Durch die Abspeicherung der Ist-Leistungsdaten dann, wenn diese von den Soll-Leistungsdaten abweichen, wird der Nachweis einer Änderung der Soll-Leistungsdaten ohne weiteres möglich. Der Fahrzeugbenutzer erhält andererseits damit auch die Möglichkeit, den Nachweis zu führen, daß beispielsweise seine Soll-Leistungsdaten nicht verändert sind und kann dann gegenüber dem Fahrzeughersteller bzw. der Versicherung seine berechtigten Ansprüche belegen. Auch die nicht völlig auszuschließende Möglichkeit einer Veränderung der Leistungsdaten ohne Einfluß und Zutun des Fahrzeugbenutzers, beispielsweise beim Austausch der Steuereinrichtung und einem Werkstattfehler läßt sich für den Fahrzeugbenutzer ebenfalls ohne weiteres führen. Bei einem Besitzerwechsel wird es dem nachfolgenden Besitzer möglich, eine mögliche übermäßige Beanspruchung der Brennkraftmaschine anhand der abgespeicherten Ist-Leistungsdaten zu erkennen. Er kann dann beispielsweise von einem Kauf des Fahrzeugs Abstand nehmen. Andererseits kann der Vorbenutzer anhand von nicht abgespeicherten Ist-Leistungsdaten den Nachweis des ordnungsgemäßen Betriebs der Brennkraftmaschine führen. Der Käufer eines Fahrzeugs erhält damit in gewisser Weise die Sicherheit, eine Brennkraftmaschine mit normaler Lebensdauer zu erwerben.By saving the actual performance data if these deviate from the target performance data, it is readily possible to prove that the target performance data has changed. On the other hand, the vehicle user also has the opportunity to provide proof that, for example, his target performance data has not changed and can then prove his legitimate claims against the vehicle manufacturer or the insurance company. Also the possibility of changing the performance data, which cannot be completely ruled out without the influence and intervention of the vehicle user, for example when replacing the control device and a workshop error, can also be easily carried out for the vehicle user. In the event of a change of ownership, the subsequent owner is able to recognize a possible excessive stress on the internal combustion engine on the basis of the stored actual performance data. He can then refrain from buying the vehicle, for example. On the other hand, the previous user can provide evidence of the proper operation of the internal combustion engine on the basis of non-stored actual performance data. To a certain extent, the buyer of a vehicle thus has the security of purchasing an internal combustion engine with a normal service life.

Weitere Ausgestaltungen und vorteilhafte Verbesserungen der Erfindung sind Gegenstand der weiteren Patentansprüche.Further refinements and advantageous improvements of the invention are the subject of the further claims.

So liefert die Information über die zeitliche Wirksamkeit dabei insbesondere Tag, Monat und/oder Jahr ein gutes Maß dafür, in welchem Umfang die Brennkraftmaschine übermäßig belastet wurde. Weitere Möglichkeiten, hierzu Informationen zu liefern, bestehen darin, die Laufleistung festzuhalten, mit der das Fahrzeug mit den veränderten Ist-Leistungsdaten betrieben wurde.The information on the temporal effectiveness, in particular the day, month and / or year, provides a good measure of the extent to which the internal combustion engine has been excessively loaded. Other ways of providing information in this regard are to record the mileage with which the vehicle was operated with the changed actual performance data.

Die Abspeicherung der Ist-Leistungsdaten innerhalb des Steuergeräts ermöglicht, den Vergleich von Soll- und Ist-Leistungsdaten anhand der Steuereinrichtung selbst durchzuführen. Die Abspeicherung redundant an einer Stelle außerhalb der Steuereinrichtung hingegen ermöglicht es, auch bei einem Austausch der Steuereinrichtung einen evtl. Mißbrauch oder aber auch eine Änderung der Soll-Leistungsdaten zweifelsfrei feststellen zu können.The storage of the actual performance data within the control device makes it possible to carry out the comparison of target and actual performance data using the control device itself. The redundant storage at a point outside the control device, on the other hand, makes it possible, even when the control device is exchanged, to be able to unequivocally determine any misuse or even a change in the target performance data.

Die in den Patentansprüchen 6 und 7 angegebenen Möglichkeiten beziehen sich auf besondere Brennkraftmaschinentypen wie Diesel- oder aufgeladene Otto-Brennkraftmaschinen und bieten mit wenig Daten eine hohe Transparenz für eine evtl. Leistungssteigerung der Brennkraftmaschine. Die im Patentanspruch 8 genannten Merkmale bieten besonders bei Otto-Brennkraftmaschinen diese Möglichkeit.The options specified in patent claims 6 and 7 relate to special internal combustion engine types such as diesel or supercharged Otto internal combustion engines and, with little data, offer high transparency for a possible increase in the performance of the internal combustion engine. The features mentioned in claim 8 offer this possibility, especially in gasoline internal combustion engines.

Ferner können auch andere Soll-Leistungsdaten mit den zugehörigen Ist-Daten abgespeichert werden. Erfolgt die Manipulation nicht durch ein geändertes Software-Programm, sondern durch

Figure imgb0001
Anfetten", d.h. durch Ändern des Ansauglufttemperaturfühler-Widerstandswertes, so kann dies durch Vergleich der Ansaugluft- und der Außentemperatur in einem stabilen Zustand des Fahrzeugs, z.B. bei einer über 20km/h liegenden Fahrzeuggeschwindigkeit erfolgen. Beide Temperatursignale sind über einen internen Datenbus verfügbar. Eine Unplausibilität kann im zusätzlichen Speicher dokumentiert werden.Furthermore, other target performance data can also be stored with the associated actual data. If the manipulation is not done by a changed software program, but by
Figure imgb0001
Grease ", ie by changing the intake air temperature sensor resistance value, this can be done by comparing the intake air and the outside temperature in a stable state of the vehicle, for example at a vehicle speed above 20 km / h. Both temperature signals are available via an internal data bus Implausibility can be documented in the additional memory.

Weitere Verbesserungen des erfindungsgemäßen Verfahrens bestehen darin, den Softwarestand des in der Steuereinrichtung eingesetzten Programms durch eine Prüfsumme zu dokumentieren und die Prüfsumme zusätzlich abzuspeichern. Hierfür kann wiederum der Speicher eines anderen, z.B. im Rahmen einer elektronischen Wegfahrsicherung eingesetzten Steuergeräts verwendet werden. Bei jedem Fahrzeugstart wird dieser Wert mit dem Wert in der Steuereinrichtung verglichen. Liegt ein neuer Wert vor, so wird dieser ebenfalls abgespeichert. Mit dieser Methode kann eindeutig festgestellt werden, ob ein korrekter Wert, d.h. der ursprüngliche Softwarestand, oder eine Manipulation vorliegt.Further improvements of the method according to the invention consist in documenting the software version of the program used in the control device by means of a checksum and additionally storing the checksum. For this, the memory of another, e.g. used in an electronic immobilizer control unit. Each time the vehicle is started, this value is compared with the value in the control device. If there is a new value, it is also saved. With this method it can be clearly determined whether a correct value, i.e. the original software version, or manipulation is present.

Ergänzend oder alternativ kann die Möglichkeit, evtl. Manipulationen zu dokumentieren und nachträglich zu erkennen, noch weiter verbessert werden. Hierzu ist die Steuereinrichtung mit einer fahrzeugindividuellen Kennung, beispielsweise in Form der Fahrgestellnummer versehen. Auch diese Kennung kann in einem zusätzlichen Speicher, beispielsweise dem Speicher eines anderen Steuergeräts festgehalten werden. Das Steuergerät wird beispielsweise im Rahmen einer elektronischen Wegfahrsicherung verwendet. Bei jedem Fahrzeugstart wird die dort gespeicherte Kennung mit dem aktuellen Wert der Kennung in der Steuereinrichtung verglichen. Bei fehlender Übereinstimmung kann beispielsweise ein Starten des Fahrzeugs verhindert werden oder aber auch eine Dokumentation der Diskrepanz vorgenommen werden.Additionally or alternatively, the possibility of documenting manipulations and subsequently recognizing them can be further improved. For this purpose, the control device is provided with a vehicle-specific identifier, for example in the form of the chassis number. This identifier can also be stored in an additional memory, for example the memory of another control device. The control device is used, for example, in the context of an electronic immobilizer. Each time the vehicle is started, the identifier stored there is compared with the current value of the identifier in the control device. If there is a mismatch, the vehicle can be prevented from starting, for example, or the discrepancy can be documented.

Diese Kennung kann ebenso wie die Soll-Leistungsdaten auch noch ein weiteres mal in einem anderen Speicher festgehalten werden. Dadurch erhöht sich der Schutz vor einem mißbräuchlichen gleichzeitigen Austausch der Steuereinrichtung und des den zusätzlichen Speicher enthaltenen Steuergeräts.This identifier, like the target performance data, can also be stored in another memory once more. This increases the protection against improper simultaneous exchange of the control device and the control device containing the additional memory.

Claims (9)

Verfahren zum Betrieb einer Brennkraftmaschine mit Hilfe einer Steuereinrichtung, die einen elektronischen Speicher für vorgegebene, für das Leistungsverhalten der Brennkraftmaschine relevante Programmdaten (Soll-Leistungsdaten) enthält, dadurch gekennzeichnet, daß die Soll-Leistungsdaten zusätzlich abgespeichert werden, daß die Soll-Leistungsdaten mit den aktuellen, für das Leistungsverhalten der Brennkraftmaschine relevanten Programmdaten (Ist-Leistungsdaten) verglichen werden und daß die Ist-Leistungsdaten abgespeichert werden, wenn sie gegenüber den Soll-Leistungsdaten verändert sind.Method for operating an internal combustion engine with the aid of a control device which contains an electronic memory for predetermined program data (target performance data) relevant for the performance behavior of the internal combustion engine, characterized in that the target performance data are additionally stored in such a way that the target performance data are stored with the current program data relevant to the performance of the internal combustion engine (actual performance data) are compared and that the actual performance data are stored if they have changed compared to the target performance data. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Ist-Leistungsdaten hinsichtlich ihrer zeitlichen Wirksamkeit abgespeichert werden.Method according to claim 1, characterized in that the actual performance data are stored with regard to their temporal effectiveness. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Information über die zeitliche Wirksamkeit auch den Tag, Monat und/oder Jahr enthält.A method according to claim 2, characterized in that the information on the temporal effectiveness also includes the day, month and / or year. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ist-Leistungsdaten in der Steuereinrichtung abgespeichert werden.Method according to one of claims 1 to 3, characterized in that the actual performance data are stored in the control device. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Soll-Leistungsdaten außerhalb der Steuereinrichtung redundant abgespeichert werden.Method according to one of claims 1 to 4, characterized in that the target performance data are stored redundantly outside the control device. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ist- und die Soll-Leistungsdaten eine Information über den maximalen Verbrennungsdruck enthalten.Method according to one of claims 1 to 5, characterized in that the actual and the target performance data contain information about the maximum combustion pressure. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Information den Maximalwert des Ladedrucks und/oder der Einspritzmenge enthalten.Method according to claim 6, characterized in that the information contains the maximum value of the boost pressure and / or the injection quantity. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß bei einer Otto-Brennkraftmaschine die Ist- und die Soll-Leistungsdaten Informationen über die zugehörigen Kraftstoffmenge und die Drehzahl enthalten.Method according to one of claims 1 to 5, characterized in that in a gasoline internal combustion engine the actual and the target performance data contain information about the associated fuel quantity and the speed. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Steuereinrichtung auch eine fahrzeugindividuelle Kennung enthält und daß diese Kennung ebenfalls zusätzlich abgespeichert wird.Method according to one of claims 1 to 8, characterized in that the control device also contains a vehicle-specific identifier and that this identifier is also additionally stored.
EP97102393A 1996-03-30 1997-02-14 Method of operation of an internal combustion engine using a control apparatus Expired - Lifetime EP0798456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19612857A DE19612857A1 (en) 1996-03-30 1996-03-30 Method for operating an internal combustion engine with the aid of a control device
DE19612857 1996-03-30

Publications (3)

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EP0798456A2 true EP0798456A2 (en) 1997-10-01
EP0798456A3 EP0798456A3 (en) 1999-05-12
EP0798456B1 EP0798456B1 (en) 2003-09-24

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DE (2) DE19612857A1 (en)
ES (1) ES2207692T3 (en)

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US7467035B2 (en) * 2004-05-18 2008-12-16 Haldex Brake Products Ltd. Vehicle control system with redundant storage of vehicle control parameters

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DE102004026582A1 (en) * 2004-05-28 2005-12-15 Robert Bosch Gmbh Method for activating learning processes of a control unit and control unit
DE102011002805B4 (en) 2011-01-18 2024-08-14 Bayerische Motoren Werke Aktiengesellschaft Method for detecting errors in an electronically controlled drive system of a motor vehicle
DE102011076682B4 (en) 2011-05-30 2024-03-07 Bayerische Motoren Werke Aktiengesellschaft Method and safety concept for detecting errors in a drive system of a motor vehicle
DE102012201653B4 (en) 2012-02-03 2024-05-29 Bayerische Motoren Werke Aktiengesellschaft Circuit arrangement in an electronic control unit of a motor vehicle for detecting errors

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US4996643A (en) * 1988-02-18 1991-02-26 Fuji Jukogyo Kabushiki Kaisha Diagnosis system for a motor vehicle
DE3829949A1 (en) * 1988-09-03 1990-03-15 Daimler Benz Ag METHOD FOR OPERATING AN ELECTRIC PRESSURE OPERATING BRAKE DEVICE AND CONTROL DEVICE FOR CARRYING OUT THE METHOD
US5111686A (en) * 1990-02-26 1992-05-12 Nippondenso Co., Ltd. Fault diagnosis apparatus for mounting on a vehicle
DE4117393A1 (en) * 1991-05-28 1992-12-03 Kloeckner Humboldt Deutz Ag DEVICE FOR CONTROLLING THE FUEL INJECTION OF AN INTERNAL COMBUSTION ENGINE
EP0536676A2 (en) * 1991-10-09 1993-04-14 Zexel Corporation Electronic fuel-injection device having read/write memory for storing actuator correction value
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7467035B2 (en) * 2004-05-18 2008-12-16 Haldex Brake Products Ltd. Vehicle control system with redundant storage of vehicle control parameters

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DE19612857A1 (en) 1997-10-02
ES2207692T3 (en) 2004-06-01
DE59710764D1 (en) 2003-10-30
EP0798456B1 (en) 2003-09-24
EP0798456A3 (en) 1999-05-12

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