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WO2008037769A1 - Method and device for operating a motor vehicle - Google Patents

Method and device for operating a motor vehicle Download PDF

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Publication number
WO2008037769A1
WO2008037769A1 PCT/EP2007/060267 EP2007060267W WO2008037769A1 WO 2008037769 A1 WO2008037769 A1 WO 2008037769A1 EP 2007060267 W EP2007060267 W EP 2007060267W WO 2008037769 A1 WO2008037769 A1 WO 2008037769A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor vehicle
internal combustion
combustion engine
operating
limited operation
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.)
Ceased
Application number
PCT/EP2007/060267
Other languages
German (de)
French (fr)
Inventor
Tahar Zrilli
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.)
Continental Automotive GmbH
Original Assignee
Siemens VDO Automotive AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens VDO Automotive AG filed Critical Siemens VDO Automotive AG
Publication of WO2008037769A1 publication Critical patent/WO2008037769A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
    • B60Q1/52—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking for indicating emergencies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/0205—Diagnosing or detecting failures; Failure detection models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/029—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
    • B60W2050/0292—Fail-safe or redundant systems, e.g. limp-home or backup systems

Definitions

  • the invention relates to a method and a device for operating a motor vehicle.
  • the motor vehicle includes an internal combustion engine.
  • an operating error of the internal combustion engine and / or a vehicle component coupled to the internal combustion engine occurs, the internal combustion engine is operated in a limited operation.
  • the safety measures may be, for example, a limitation of a torque generated by the internal combustion engine, a speed of the internal combustion engine and / or a speed of the motor vehicle. These safety measures are taken as soon as an engine control of the internal combustion engine detects an operating error of the internal combustion engine. Depending on a current driving situation, the limitation may lead to an abrupt power loss of the internal combustion engine and thereby to an abrupt change in the speed of the motor vehicle.
  • the components coupled to the internal combustion engine may include, for example, a drive train and / or an exhaust system of the motor vehicle.
  • the invention is characterized by a method and a device for operating a motor vehicle.
  • the motor vehicle has an internal combustion engine.
  • an operating error of the internal combustion engine and / or a vehicle component coupled to the internal combustion engine occurs, the internal combustion engine is operated in a limited operation. Shortly before and / or during limited operation, an external warning signal is generated to warn at least one other road user outside the motor vehicle.
  • the vehicle component coupled to the internal combustion engine may include, for example, a drive train and / or an exhaust system of the internal combustion engine.
  • a torque produced by the internal combustion engine is limited, ie provided with an upper limit value.
  • other operating variables can also be limited, for example a rotational speed of the internal combustion engine and / or a speed of the motor vehicle.
  • the speed of the motor vehicle may change abruptly. Without the external warning signal, this can lead to a dangerous traffic situation, in particular to a rear-end collision. Signaling the limited operation to the outside makes it possible to warn the other road users of the abrupt change in speed. This simply contributes to safe driving with the motor vehicle.
  • an optical warning signal is generated for warning the other road user. This can easily help to warn the other road users.
  • At least one brake light of the motor vehicle is turned on to warn the other road user. This contributes particularly effectively to warning the other road users, since the brake light is a signal familiar to motorists, indicating that the vehicle in front is slowing down.
  • a hazard warning light of the motor vehicle is turned on to warn the other road user.
  • the hazard warning light of the motor vehicle comprises at least one turn signal of the motor vehicle. This is particularly effective in warning the other road users, since the hazard warning light is a signal familiar to motorists, indicating that the vehicle in front has a problem.
  • the other road users will regularly count on the occurrence of the problem of the preceding vehicle and especially when switching on the hazard warning light of the vehicle ahead with the slowing down of the vehicle in front. This contributes effectively to safe driving with the motor vehicle.
  • Figure 2 shows a program for operating the motor vehicle.
  • a motor vehicle 2 (FIG. 1) comprises an internal combustion engine 4.
  • the internal combustion engine 4 is coupled to a drive train 3 and to an exhaust system 5 of the motor vehicle 2, in particular mechanically coupled.
  • the motor vehicle 2 comprises at least one, preferably a plurality of brake lights 6 and a plurality of turn signals 8.
  • the drive train 3 may comprise, for example, a transmission of the motor vehicle 2.
  • the exhaust system 5 preferably comprises at least one catalytic converter.
  • the exhaust system 5 may also include an exhaust gas turbocharger and / or a post-injection device.
  • the motor vehicle 2 in particular the internal combustion engine 4 can be operated in a limited operation.
  • the limited operation at least one operating variable of the internal combustion engine 4 is limited, ie the operating variable is provided with an upper limit value.
  • the operating variable can be, for example, a torque produced by the internal combustion engine, a rotary number of the internal combustion engine and / or a speed of the motor vehicle 2 be.
  • Switching to limited operation can lead to a drop in performance.
  • the abrupt change in speed can in particular surprise another road user outside the motor vehicle 2, for example a driver of another motor vehicle behind the motor vehicle 2. This can lead to a dangerous traffic situation, in particular to a rear-end collision, if the other road user is not warned in good time before the limited operation occurs.
  • an external warning signal SIG is generated.
  • the external warning signal SIG may include an optical signal and / or an acoustic signal.
  • the optical signal preferably comprises switching on the brake lights 6 and / or switching on a hazard warning light of the motor vehicle 2, which comprises at least two of the turn signals 8.
  • a program for operating the motor vehicle is preferably stored on a storage medium of an engine control system of the internal combustion engine 4.
  • the engine control may also be referred to as a device for operating the motor vehicle 2.
  • the program is used to warn the other road users of the limited operation.
  • the program is preferably started promptly a start of the internal combustion engine 4 in a step Sl, in which variables are initialized if necessary.
  • a step S2 it is checked whether the operating error ERROR is present, as a result of which it is necessary to switch to limited operation. If the condition of step S2 is met, the processing is continued in a step S3. If the condition of step S2 is not met, the processing is continued again in step S1.
  • the warning signal SIG is generated.
  • the warning signal SIG is already generated shortly before setting the limited operation and maintained at least for a predetermined period of time during the limited operation.
  • the warning signal SIG may be generated only before the limited operation occurs or only during the limited operation.
  • a step S4 the program can be ended.
  • the program is executed outside of the limited operation during operation of the internal combustion engine 4 regularly.
  • the motor vehicle 2 may be a truck and / or a two-wheeled vehicle.
  • the program may be implemented in another program stored on the storage medium of the engine controller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

According to the invention, if an operating error (ERROR) occurs in an internal combustion engine (4) and/or in a vehicle component of a motor vehicle (2), said component being coupled to the internal combustion engine (4), the operation of the internal combustion engine (4) is restricted. Immediately before and/or during the restricted operation, an external warning signal (SIG) is generated to warn at least one road user outside the motor vehicle (2).

Description

Beschreibungdescription

Verfahren und Vorrichtung zum Betreiben eines KraftfahrzeugsMethod and device for operating a motor vehicle

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Betreiben eines Kraftfahrzeugs. Das Kraftfahrzeug umfasst eine Brennkraftmaschine. Bei dem Auftreten eines Betriebsfehlers der Brennkraftmaschine und/oder einer mit der Brennkraftmaschine gekoppelten Fahrzeugkomponente wird die Brenn- kraftmaschine in einem limitierten Betrieb betrieben.The invention relates to a method and a device for operating a motor vehicle. The motor vehicle includes an internal combustion engine. When an operating error of the internal combustion engine and / or a vehicle component coupled to the internal combustion engine occurs, the internal combustion engine is operated in a limited operation.

Brennkraftmaschinen und/oder mit der Brennkraftmaschine gekoppelte Fahrzeugkomponenten moderner Kraftfahrzeuge werden regelmäßig durch Sicherheitsmaßnahmen vor Beschädigungen ge- schützt. Die Sicherheitsmaßnahmen können beispielsweise eine Limitierung eines von der Brennkraftmaschine erzeugten Drehmoments, einer Drehzahl der Brennkraftmaschine und/oder einer Geschwindigkeit des Kraftfahrzeugs sein. Diese Sicherheitsmaßnahmen werden ergriffen, sobald eine Motorsteuerung der Brennkraftmaschine einen Betriebsfehler der Brennkraftmaschine erkennt. Die Limitierung kann abhängig von einer aktuellen Fahrsituation zu einem abrupten Leistungsabfall der Brennkraftmaschine und dadurch zu einer abrupten Geschwindigkeitsänderung des Kraftfahrzeugs führen. Die mit der Brennkraftma- schine gekoppelten Komponenten können beispielsweise einen Antriebsstrang und/oder eine Abgasanlage des Kraftfahrzeugs umfassen .Internal combustion engines and / or vehicle components of modern motor vehicles coupled to the internal combustion engine are regularly protected against damage by safety measures. The safety measures may be, for example, a limitation of a torque generated by the internal combustion engine, a speed of the internal combustion engine and / or a speed of the motor vehicle. These safety measures are taken as soon as an engine control of the internal combustion engine detects an operating error of the internal combustion engine. Depending on a current driving situation, the limitation may lead to an abrupt power loss of the internal combustion engine and thereby to an abrupt change in the speed of the motor vehicle. The components coupled to the internal combustion engine may include, for example, a drive train and / or an exhaust system of the motor vehicle.

Es ist Aufgabe der Erfindung, ein Verfahren und eine Vorrich- tung zum Betreiben eines Kraftfahrzeugs zu schaffen, das beziehungsweise die einfach ein sicheres Fahren mit dem Kraftfahrzeug ermöglicht. Die Aufgabe wird gelöst durch die Merkmale des unabhängigen Anspruchs 1 und durch die Merkmale des unabhängigen Anspruchs 5. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.It is an object of the invention to provide a method and a device for operating a motor vehicle, which simply enables safe driving with the motor vehicle. The object is solved by the features of independent claim 1 and by the features of independent claim 5. Advantageous embodiments of the invention are specified in the subclaims.

Die Erfindung zeichnet sich aus durch ein Verfahren und eine Vorrichtung zum Betreiben eines Kraftfahrzeugs. Das Kraftfahrzeug hat eine Brennkraftmaschine. Bei dem Auftreten eines Betriebsfehlers der Brennkraftmaschine und/oder einer mit der Brennkraftmaschine gekoppelten Fahrzeugkomponente wird die Brennkraftmaschine in einem limitierten Betrieb betrieben. Zeitnah vor und/oder während des limitierten Betriebs wird zum Warnen zumindest eines weiteren Verkehrsteilnehmers außerhalb des Kraftfahrzeuges ein äußeres Warnsignal erzeugt.The invention is characterized by a method and a device for operating a motor vehicle. The motor vehicle has an internal combustion engine. When an operating error of the internal combustion engine and / or a vehicle component coupled to the internal combustion engine occurs, the internal combustion engine is operated in a limited operation. Shortly before and / or during limited operation, an external warning signal is generated to warn at least one other road user outside the motor vehicle.

Die mit der Brennkraftmaschine gekoppelte Fahrzeugkomponente kann beispielsweise einen Antriebsstrang und/oder eine Abgasanlage der Brennkraftmaschine umfassen. In dem limitierten Betrieb wird vorzugsweise ein von der Brennkraftmaschine her- vorgerufenes Drehmoment limitiert, d. h. mit einem oberen Grenzwert versehen. Alternativ oder zusätzlich können auch andere Betriebsgrößen limitiert werden, beispielsweise eine Drehzahl der Brennkraftmaschine und/oder eine Geschwindigkeit des Kraftfahrzeugs. Beim Umschalten in den limitierten Be- trieb kann sich die Geschwindigkeit des Kraftfahrzeugs abrupt ändert. Ohne das äußere Warnsignal kann dies zu einer gefährlichen Verkehrssituation, insbesondere zu einem Auffahrunfall führen. Das Signalisieren des limitierten Betriebs nach außen ermöglicht es, die weiteren Verkehrsteilnehmer vor der abrup- ten Geschwindigkeitsänderung zu warnen. Dies trägt einfach zu einem sicheren Fahren mit dem Kraftfahrzeug bei. In einer vorteilhaften Ausgestaltung des Verfahrens wird zum Warnen des weiteren Verkehrsteilnehmers ein optisches Warnsignal erzeugt. Dies kann einfach dazu beitragen, den weiteren Verkehrsteilnehmer zu warnen.The vehicle component coupled to the internal combustion engine may include, for example, a drive train and / or an exhaust system of the internal combustion engine. In the limited operation, preferably, a torque produced by the internal combustion engine is limited, ie provided with an upper limit value. Alternatively or additionally, other operating variables can also be limited, for example a rotational speed of the internal combustion engine and / or a speed of the motor vehicle. When switching to limited operation, the speed of the motor vehicle may change abruptly. Without the external warning signal, this can lead to a dangerous traffic situation, in particular to a rear-end collision. Signaling the limited operation to the outside makes it possible to warn the other road users of the abrupt change in speed. This simply contributes to safe driving with the motor vehicle. In an advantageous embodiment of the method, an optical warning signal is generated for warning the other road user. This can easily help to warn the other road users.

In einer weiteren vorteilhaften Ausgestaltung des Verfahrens wird zum Warnen des weiteren Verkehrsteilnehmers zumindest ein Bremslicht des Kraftfahrzeugs eingeschaltet. Dies trägt besonders wirkungsvoll dazu bei, den weiteren Verkehrsteil- nehmer zu warnen, da das Bremslicht ein für Autofahrer gewohntes Signal ist, das anzeigt, dass das vorausfahrende Kraftfahrzeug langsamer wird.In a further advantageous embodiment of the method, at least one brake light of the motor vehicle is turned on to warn the other road user. This contributes particularly effectively to warning the other road users, since the brake light is a signal familiar to motorists, indicating that the vehicle in front is slowing down.

In einer weiteren vorteilhaften Ausgestaltung des Verfahrens wird zum Warnen des weiteren Verkehrsteilnehmers ein Warnblinklicht des Kraftfahrzeugs eingeschaltet. Das Warnblinklicht des Kraftfahrzeugs umfasst zumindest einen Blinker des Kraftfahrzeugs. Dies trägt besonders wirkungsvoll dazu bei, den weiteren Verkehrsteilnehmer zu warnen, da das Warnblink- licht ein für Autofahrer gewohntes Signal ist, das anzeigt, dass das vorausfahrende Kraftfahrzeug ein Problem hat. Der weitere Verkehrsteilnehmer wird regelmäßig beim Auftreten des Problems des vorausfahrenden Kraftfahrzeugs und insbesondere beim Einschalten des Warnblinklichts des vorausfahrenden Fahrzeugs mit dem Langsamerwerden des vorausfahrenden Kraftfahrzeugs rechnen. Dies trägt wirkungsvoll zu dem sicheren Fahren mit dem Kraftfahrzeug bei.In a further advantageous embodiment of the method, a hazard warning light of the motor vehicle is turned on to warn the other road user. The hazard warning light of the motor vehicle comprises at least one turn signal of the motor vehicle. This is particularly effective in warning the other road users, since the hazard warning light is a signal familiar to motorists, indicating that the vehicle in front has a problem. The other road users will regularly count on the occurrence of the problem of the preceding vehicle and especially when switching on the hazard warning light of the vehicle ahead with the slowing down of the vehicle in front. This contributes effectively to safe driving with the motor vehicle.

Die vorteilhaften Ausgestaltungen des Verfahrens können ohne weiteres auf vorteilhafte Ausgestaltungen der Vorrichtung ü- bertragen werden. Die Erfindung ist im Folgenden anhand von schematischen Zeichnungen näher erläutert.The advantageous embodiments of the method can be readily transferred to advantageous embodiments of the device. The invention is explained in more detail below with reference to schematic drawings.

Es zeigen:Show it:

Figur 1 ein Kraftfahrzeug,1 shows a motor vehicle,

Figur 2 ein Programm zum Betreiben des Kraftfahrzeugs.Figure 2 shows a program for operating the motor vehicle.

Elemente gleicher Konstruktion und/oder Funktion sind figurenübergreifend mit den gleichen Bezugszeichen gekennzeichnet .Elements of the same construction and / or function are identified across the figures with the same reference numerals.

Ein Kraftfahrzeug 2 (Figur 1) umfasst eine Brennkraftmaschine 4. Die Brennkraftmaschine 4 ist mit einem Antriebsstrang 3 und mit einer Abgasanlage 5 des Kraftfahrzeugs 2 gekoppelt, insbesondere mechanisch gekoppelt. Ferner umfasst das Kraftfahrzeug 2 zumindest ein, bevorzugt mehrere Bremslichter 6 und mehrere Blinker 8. Der Antriebsstrang 3 kann beispiels- weise ein Getriebe des Kraftfahrzeugs 2 umfassen. Die Abgasanlage 5 umfasst vorzugsweise zumindest einen Abgaskatalysator. Die Abgasanlage 5 kann auch einen Abgasturbolader und/oder eine Nacheinspritzvorrichtung umfassen.A motor vehicle 2 (FIG. 1) comprises an internal combustion engine 4. The internal combustion engine 4 is coupled to a drive train 3 and to an exhaust system 5 of the motor vehicle 2, in particular mechanically coupled. Furthermore, the motor vehicle 2 comprises at least one, preferably a plurality of brake lights 6 and a plurality of turn signals 8. The drive train 3 may comprise, for example, a transmission of the motor vehicle 2. The exhaust system 5 preferably comprises at least one catalytic converter. The exhaust system 5 may also include an exhaust gas turbocharger and / or a post-injection device.

Falls während dem Betrieb des Kraftfahrzeugs 2 ein Betriebsfehler ERROR auftritt, beispielsweise ein Betriebsfehler ERROR der Brennkraftmaschine 4, so kann das Kraftfahrzeug 2, insbesondere die Brennkraftmaschine 4 in einem limitierten Betrieb betrieben werden. In dem limitierten Betrieb wird zu- mindest eine Betriebsgröße der Brennkraftmaschine 4 limitiert, d. h. die Betriebsgröße wird mit einem oberen Grenzwert versehen. Die Betriebsgröße kann beispielsweise ein von der Brennkraftmaschine hervorgerufenes Drehmoment, eine Dreh- zahl der Brennkraftmaschine und/oder eine Geschwindigkeit des Kraftfahrzeugs 2 sein.If an operating error ERROR occurs during operation of the motor vehicle 2, for example an operating error ERROR of the internal combustion engine 4, then the motor vehicle 2, in particular the internal combustion engine 4, can be operated in a limited operation. In the limited operation, at least one operating variable of the internal combustion engine 4 is limited, ie the operating variable is provided with an upper limit value. The operating variable can be, for example, a torque produced by the internal combustion engine, a rotary number of the internal combustion engine and / or a speed of the motor vehicle 2 be.

Das Umschalten in den limitierten Betrieb kann zu einem Leis- tungsabfall führen. Der Leistungsabfall führt regelmäßig zu einer abrupten Geschwindigkeitsänderung des Kraftfahrzeugs 2. Die abrupte Geschwindigkeitsänderung kann insbesondere einen weiteren Verkehrsteilnehmer außerhalb des Kraftfahrzeugs 2, beispielsweise einen Fahrer eines weiteren Kraftfahrzeugs hinter dem Kraftfahrzeug 2, überraschen. Dies kann zu einer gefährlichen Verkehrssituation, insbesondere zu einem Auffahrunfall führen, falls der weitere Verkehrsteilnehmer nicht rechtzeitig vor dem Eintreten des limitierten Betriebs gewarnt wird.Switching to limited operation can lead to a drop in performance. The abrupt change in speed can in particular surprise another road user outside the motor vehicle 2, for example a driver of another motor vehicle behind the motor vehicle 2. This can lead to a dangerous traffic situation, in particular to a rear-end collision, if the other road user is not warned in good time before the limited operation occurs.

Zum Warnen des weiteren Verkehrsteilnehmers wird ein äußeres Warnsignal SIG erzeugt. Das äußere Warnsignal SIG kann ein optisches Signal und/oder ein akustisches Signal umfassen. Das optische Signal umfasst vorzugsweise ein Einschalten der Bremslichter 6 und/oder ein Einschalten eines Warnblinklichts des Kraftfahrzeugs 2, das zumindest zwei der Blinker 8 umfasst .To warn the other road user, an external warning signal SIG is generated. The external warning signal SIG may include an optical signal and / or an acoustic signal. The optical signal preferably comprises switching on the brake lights 6 and / or switching on a hazard warning light of the motor vehicle 2, which comprises at least two of the turn signals 8.

Ein Programm zum Betreiben des Kraftfahrzeugs (Figur 2) ist vorzugsweise auf einem Speichermedium einer Motorsteuerung der Brennkraftmaschine 4 gespeichert. Die Motorsteuerung kann auch als Vorrichtung zum Betreiben des Kraftfahrzeugs 2 bezeichnet werden. Das Programm dient dazu, den weiteren Verkehrsteilnehmer vor dem limitierten Betrieb zu warnen. Das Programm wird vorzugsweise zeitnah einem Start der Brennkraftmaschine 4 in einem Schritt Sl gestartet, in dem gegebenenfalls Variablen initialisiert werden. In einem Schritt S2 wird geprüft, ob der Betriebsfehler ERROR vorliegt, aufgrund dessen in den limitierten Betrieb umgeschaltet werden muss. Ist die Bedingung des Schritts S2 erfüllt, so wird die Bearbeitung in einem Schritt S3 fortge- setzt. Ist die Bedingung des Schritts S2 nicht erfüllt, so wird die Bearbeitung erneut in dem Schritt Sl fortgesetzt.A program for operating the motor vehicle (FIG. 2) is preferably stored on a storage medium of an engine control system of the internal combustion engine 4. The engine control may also be referred to as a device for operating the motor vehicle 2. The program is used to warn the other road users of the limited operation. The program is preferably started promptly a start of the internal combustion engine 4 in a step Sl, in which variables are initialized if necessary. In a step S2 it is checked whether the operating error ERROR is present, as a result of which it is necessary to switch to limited operation. If the condition of step S2 is met, the processing is continued in a step S3. If the condition of step S2 is not met, the processing is continued again in step S1.

In dem Schritt S3 wird das Warnsignal SIG erzeugt. Vorzugsweise wird das Warnsignal SIG schon kurz vor dem Einstellen des limitierten Betriebs erzeugt und zumindest für eine vorgegebene Zeitdauer während des limitierten Betriebs aufrecht erhalten. Alternativ kann das Warnsignal SIG lediglich vor dem Eintreten des limitierten Betriebs oder lediglich während des limitierten Betriebs erzeugt werden.In step S3, the warning signal SIG is generated. Preferably, the warning signal SIG is already generated shortly before setting the limited operation and maintained at least for a predetermined period of time during the limited operation. Alternatively, the warning signal SIG may be generated only before the limited operation occurs or only during the limited operation.

In einem Schritt S4 kann das Programm beendet werden. Vorzugsweise wird jedoch das Programm außerhalb des limitierten Betriebs während dem Betrieb der Brennkraftmaschine 4 regelmäßig abgearbeitet.In a step S4, the program can be ended. Preferably, however, the program is executed outside of the limited operation during operation of the internal combustion engine 4 regularly.

Die Erfindung ist nicht auf die angegebenen Ausführungsbeispiele beschränkt. Beispielsweise kann das Kraftfahrzeug 2 ein Lastkraftwagen und/oder ein Zweirad sein. Ferner kann das Programm in einem weiteren Programm implementiert sein, das auf dem Speichermedium der Motorsteuerung gespeichert ist. The invention is not limited to the specified embodiments. For example, the motor vehicle 2 may be a truck and / or a two-wheeled vehicle. Further, the program may be implemented in another program stored on the storage medium of the engine controller.

Claims

Patentansprüche : Claims: 1. Verfahren zum Betreiben eines Kraftfahrzeugs (2) mit einer Brennkraftmaschine (4), bei dem beim Auftreten eines Be- triebsfehlers (ERROR) der Brennkraftmaschine (4) und/oder einer mit der Brennkraftmaschine (4) gekoppelten Fahrzeugkomponente die Brennkraftmaschine (4) in einem limitierten Betrieb betrieben wird und bei dem zeitnah vor und/oder während des limitierten Betriebs zum Warnen zumindest eines Verkehrsteil- nehmers außerhalb des Kraftfahrzeugs (2) ein äußeres Warnsignal (SIG) erzeugt wird.1. A method for operating a motor vehicle (2) with an internal combustion engine (4), wherein when an operating error (ERROR) of the internal combustion engine (4) and / or a vehicle component coupled to the internal combustion engine (4) occurs, the internal combustion engine (4) is operated in a limited operation and in which promptly before and / or during the limited operation for warning at least one road user outside the motor vehicle (2) an external warning signal (SIG) is generated. 2. Verfahren nach Anspruch 1, bei dem zum Warnen des weiteren Verkehrsteilnehmers ein optisches Warnsignal erzeugt wird.2. The method of claim 1, wherein for warning the other road user, an optical warning signal is generated. 3. Verfahren nach Anspruch 2, bei dem zum Warnen des weiteren Verkehrsteilnehmers zumindest ein Bremslicht (8) des Kraftfahrzeugs (2) eingeschaltet wird.3. The method of claim 2, wherein at least one brake light (8) of the motor vehicle (2) is turned on to warn the other road user. 4. Verfahren nach einem der Ansprüche 2 oder 3, bei dem zum Warnen des weiteren Verkehrsteilnehmers ein Warnblinklicht des Kraftfahrzeugs eingeschaltet wird, das zumindest einen Blinker (8) des Kraftfahrzeugs (2) umfasst.4. The method according to any one of claims 2 or 3, wherein for warning the other road user a hazard warning light of the motor vehicle is turned on, which comprises at least one turn signal (8) of the motor vehicle (2). 5. Vorrichtung zum Betreiben eines Kraftfahrzeugs (2) mit einer Brennkraftmaschine (4), wobei die Vorrichtung beim Auftreten eines Betriebsfehlers (ERROR) der Brennkraftmaschine (4) und/oder einer mit der Brennkraftmaschine (4) gekoppelten Fahrzeugkomponente dazu ausgebildet ist, die Brennkraftma- schine (4) in einem limitierten Betrieb zu betreiben und zeitnah vor und/oder während des limitierten Betriebs zum Warnen zumindest eines Verkehrsteilnehmers außerhalb des Kraftfahrzeugs (2) ein äußeres Warnsignal (SIG) zu erzeugen. 5. An apparatus for operating a motor vehicle (2) with an internal combustion engine (4), wherein the device is formed on the occurrence of an operating error (ERROR) of the internal combustion engine (4) and / or with the internal combustion engine (4) coupled vehicle component, the Brennkraftma - To operate machine (4) in a limited operation and promptly before and / or during limited operation to warn at least one road user outside the motor vehicle (2) to generate an external warning signal (SIG).
PCT/EP2007/060267 2006-09-29 2007-09-27 Method and device for operating a motor vehicle Ceased WO2008037769A1 (en)

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