DE102013217171B4 - Device and method for providing emergency driving in a motor vehicle with a hybrid drive - Google Patents
Device and method for providing emergency driving in a motor vehicle with a hybrid drive Download PDFInfo
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- DE102013217171B4 DE102013217171B4 DE102013217171.4A DE102013217171A DE102013217171B4 DE 102013217171 B4 DE102013217171 B4 DE 102013217171B4 DE 102013217171 A DE102013217171 A DE 102013217171A DE 102013217171 B4 DE102013217171 B4 DE 102013217171B4
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- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
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- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- 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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
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- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18054—Propelling the vehicle related to particular drive situations at stand still, e.g. engine in idling state
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/54—Transmission for changing ratio
- B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
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- 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
- B60W2050/0295—Inhibiting action of specific actuators or systems
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- 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
- B60W2050/0297—Control Giving priority to different actuators or systems
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- 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/10—Change speed gearings
- B60W2710/1005—Transmission ratio engaged
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1232—Bringing the control into a predefined state, e.g. giving priority to particular actuators or gear ratios
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
- F16H2061/168—Forced shifts into neutral for safety reasons, e.g. in case of transmission failure or emergency braking
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- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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- Hybrid Electric Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Vorrichtung zum Bereitstellen eines Notfahrbetriebs bei einem Kraftfahrzeug (10) mit einem Hybridantrieb mit einem Verbrennungsmotor (20), der mit einem Automatikgetriebe (30) verbunden ist, und mit einer E-Maschine (40), mit:einer Detektionseinrichtung zum Detektieren eines Fehlers im Antriebsstrang des Kraftfahrzeuges (10),einer Einrichtung (34) zum automatischen Einstellen des Automatikgetriebes (30) in einen Leerlauf, wenn während einer Fahrt bei Antrieb durch die E-Maschine (40) ein Fehler im Antriebsstrang detektiert wird, wobei das Automatikgetriebe (30) mit einem Shift-by-wire System betrieben wird, das ein Steuergerät (50) aufweist, das elektrische Signale von einer Stillstandserkennungseinrichtung (36) zum Feststellen eines Stillstands des Kraftfahrzeuges (10) empfängt,einer Notfahrfestlegungseinrichtung (38) zum Festlegen mindestens eines funktionsfähigen Ganges des Automatikgetriebes (30) für den Notfahrbetrieb mittels des Verbrennungsmotors (20), undeiner Einrichtung (22) zur Freigabe einer Weiterfahrt bei Antrieb durch den Verbrennungsmotor (20), wenn die Stillstandserkennungseinrichtung (36) den Stillstand des Kraftfahrzeuges (10) feststellt und die Notfahrfestlegungseinrichtung (38) mindestens einen funktionsfähigen Gang des Automatikgetriebes (30) festlegt.Device for providing emergency operation in a motor vehicle (10) with a hybrid drive with an internal combustion engine (20) connected to an automatic transmission (30) and with an electric machine (40), comprising: a detection device for detecting a fault in the Drive train of the motor vehicle (10), a device (34) for automatically setting the automatic transmission (30) to idle if a fault is detected in the drive train while driving when driven by the electric machine (40), the automatic transmission (30 ) is operated with a shift-by-wire system which has a control unit (50) which receives electrical signals from a standstill detection device (36) for determining a standstill of the motor vehicle (10), an emergency driving determination device (38) for determining at least one functional Gear of the automatic transmission (30) for emergency operation by means of the internal combustion engine (20), and a device (22) to enable further travel when driven by the internal combustion engine (20) when the standstill detection device (36) detects the standstill of the motor vehicle (10) and the emergency drive setting device (38) defines at least one functional gear of the automatic transmission (30).
Description
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Bereitstellen eines Notfahrbetriebs bei einem Kraftfahrzeug mit einem Hybridantrieb, insbesondere eine Vorrichtung und ein Verfahren für eine automatisierte Initialisierung auf Neutral bei Auftreten eines Funktionssicherheit-Fehlers in einem Shift-by-wire Fahrzeug.The invention relates to a device and a method for providing emergency driving mode in a motor vehicle with a hybrid drive, in particular a device and a method for automated initialization to neutral when a functional safety error occurs in a shift-by-wire vehicle.
Die
Die
Die
Die
Zum weiteren Stand der Technik wird auf
Es ist Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren zum Bereitstellen eines Notfahrbetriebs bei einem Kraftfahrzeug mit einem Hybridantrieb bereitzustellen, die eine sichere Weiterfahrt ermöglicht.The object of the present invention is to provide a device and a method for providing emergency driving mode in a motor vehicle with a hybrid drive, which enables safe continued driving.
Diese Aufgabe wird gelöst mit den Merkmalen des unabhängigen Vorrichtungsanspruchs bzw. des unabhängigen Verfahrensanspruchs. Die abhängigen Patentansprüche betreffen bevorzugte Ausführungsformen der Erfindung.This object is achieved with the features of the independent device claim and the independent method claim. The dependent claims relate to preferred embodiments of the invention.
Gemäß einem Aspekt der Erfindung weist die Vorrichtung zum Bereitstellen eines Notfahrbetriebs bei einem Kraftfahrzeug mit einem Hybridantrieb folgende Einrichtung auf. Eine Detektionseinrichtung dient zum Detektieren eines Fehlers im Antriebsstrang des Kraftfahrzeuges, der insbesondere während der Fahrt auftreten kann, wenn das Kraftfahrzeug mit der E-Maschine angetrieben wird und der Verbrennungsmotor nicht in Betrieb ist. Mit Hilfe einer Einrichtung zum automatischen Einstellen des Getriebes in den Leerlauf wird bei einer Detektion eines Fehlers während der Fahrt bei Antrieb durch die E-Maschine (elektrische Maschine) vermieden, dass der Verbrennungsmotor über das Automatikgetriebe mit einer Antriebsachse verbunden wird. Bei bekannten Systemen wird bei der Detektion eines Fehlers das Automatikgetriebe auf Notlauf umgeschaltet und bewirkt gleichzeitig eine Verbindung des Verbrennungsmotors mit einer Antriebsachse. Dies ergibt für den vorliegenden Fall, bei dem der Antrieb über die E-Maschine erfolgt, einen Zielkonflikt. Die Verbindung zwischen dem nicht laufenden Verbrennungsmotor und der Antriebsachse würde bei einem solchen Notlaufbetrieb das Kraftfahrzeug ungewollt stark abbremsen. Dies wird mit der vorliegenden Erfindung sicher vermieden, weil das Getriebe erfindungsgemäß automatisch in den Leerlauf geschaltet wird, wenn ein Fehler detektiert wird. Alternativ oder zusätzlich kann eine separat vorhandene Kupplung oder eine im Automatikgetriebe vorhandene Kupplung getrennt werden, wobei die Verbindung zwischen dem Verbrennungsmotor und einer Antriebsachse aufgehoben wird bzw. bleibt.According to one aspect of the invention, the device for providing emergency driving operation in a motor vehicle with a hybrid drive has the following device. A detection device is used to detect a fault in the drive train of the motor vehicle, which can occur in particular while driving when the motor vehicle is driven by the electric machine and the internal combustion engine is not in operation. With the help of a device for automatically setting the transmission to idle, if a fault is detected while driving when being driven by the electric machine (electric machine), the internal combustion engine is prevented from being connected to a drive axle via the automatic transmission. In known systems, when a fault is detected, the automatic transmission is switched to limp-home mode and, at the same time, causes the internal combustion engine to be connected to a drive axle. In the present case, in which the drive is provided by the electric machine, this results in a conflict of objectives. The connection between the non-running internal combustion engine and the drive axle would inadvertently brake the motor vehicle heavily in such an emergency operation. This is reliably avoided with the present invention because the transmission is automatically shifted into neutral according to the invention when a fault is detected. As an alternative or in addition, a clutch that is present separately or a clutch that is present in the automatic transmission can be disconnected, the connection between the internal combustion engine and a drive axle being canceled or remaining.
Mit dem Begriff Fehler im Antriebsstrang werden insbesondere Fehler mit eingeschlossen, die ein defektes Getriebe bzw. Getriebefehler, Motorfehler, Fehler der E-Maschine, Fehler des Verbrennungsmotors, eine defekte Kupplung, und/oder eine ausgefallene Elektronik betreffen und jede Art von Fehlern, die den Antriebsstrang vom Verbrennungsmotor zu der Antriebsachse betreffen.The term error in the drive train includes in particular errors that relate to a defective gearbox or gearbox error, engine errors, errors in the electric machine, errors in the internal combustion engine, a defective clutch and / or failed electronics and any type of errors that concern the drive train from the internal combustion engine to the drive axle.
Erfindungsgemäß weist die Vorrichtung eine Stillstandserkennungseinrichtung auf, mit der feststellbar ist ob, das Kraftfahrzeug nach Auftreten eines Fehlers im Antriebsstrang zum Stillstand gebracht wurde. Weiterhin weist die Vorrichtung eine Notfahrfestlegungseinrichtung auf zum Festlegen mindestens eines funktionsfähigen Ganges des Automatikgetriebes für einen Notfahrbetrieb mittels des Verbrennungsmotors. Des Weiteren weist die Vorrichtung eine Einrichtung zur Freigabe einer Weiterfahrt bei Antrieb durch den Verbrennungsmotor auf, die eine Weiterfahrt mittels des Verbrennungsmotors ermöglicht, wenn die Stillstandserkennungseinrichtung den Stillstand des Kraftfahrzeugs feststellt und die Notfahrfestlegungseinrichtung mindestens einen funktionsfähigen Gang des Automatikgetriebes festlegt. Dies hat den Vorteil, dass beim Stillstand des Kraftfahrzeugs der Verbrennungsmotor gestartet werden kann und in diesem Standbetrieb die für eine Weiterfahrt im Notfahrbetrieb erforderlichen Daten zwischen dem Verbrennungsmotor und dem Automatikgetriebe ausgetauscht werden können. Eine Weiterfahrt ist dann möglich mittels des Verbrennungsmotors allein, mittels der E-Maschine allein oder mittels beider Antriebe, das heißt des Verbrennungsmotors und der E-Maschine.According to the invention, the device has a standstill detection device with which it can be determined whether the motor vehicle has been brought to a standstill after a fault in the drive train has occurred. Furthermore, the device has an emergency driving setting device for setting at least one functional gear of the automatic transmission for emergency driving by means of the internal combustion engine. Furthermore, the device has a device for enabling further travel when driven by the internal combustion engine, which enables further travel by means of the internal combustion engine when the standstill detection device detects the standstill of the motor vehicle and the emergency drive setting device defines at least one functional gear of the automatic transmission. This has the advantage that when the motor vehicle is at a standstill, the internal combustion engine can be started and, in this stationary mode, the data required for further travel in emergency driving mode can be exchanged between the internal combustion engine and the automatic transmission. It is then possible to continue driving by means of the internal combustion engine alone, by means of the electric machine alone or by means of both drives, that is to say the internal combustion engine and the electric machine.
Gemäß einer Ausführung der Erfindung weist die Vorrichtung eine Diagnoseeinrichtung auf, mit der eine Fehlerdiagnose des Automatikgetriebes durchführbar ist und abhängig von der Diagnose mindestens ein funktionsfähiger Gang für einen Notfahrbetrieb festlegbar ist.According to one embodiment of the invention, the device has a diagnostic device with which a fault diagnosis of the automatic transmission can be carried out and, depending on the diagnosis, at least one functional gear for emergency driving can be established.
Gemäß einer Ausführung der Erfindung weist die Vorrichtung eine Einrichtung zum Bereitstellen eines Signals auf, das zur Ausgabe einer Nachricht für den Fahrer dient, wenn ein Fehler im Antriebsstrang detektiert wird. Das Signal kann beispielsweise zu einer optischen Anzeige und/oder zu einer akustischen Ausgabeeinrichtung geleitet werden. Beispielsweise kann dem Fahrer angezeigt werden, dass für eine Weiterfahrt im Notfahrbetrieb das Fahrzeug zum Stillstand gebracht werden muss und dafür die nächste Möglichkeit zum Anhalten genutzt werden sollte.According to one embodiment of the invention, the device has a device for providing a signal which is used to output a message for the driver when a fault is detected in the drive train. The signal can, for example, be routed to an optical display and / or to an acoustic output device. For example, it can be indicated to the driver that the vehicle must be brought to a standstill in order to continue driving in emergency mode and that the next opportunity to stop should be used for this.
Erfindungsgemäß wird das Automatikgetriebe mit einem Shift-by-wire System betrieben, das ein Steuergerät aufweist, das elektrische Signale von einer Stillstandserkennungseinrichtung zum Feststellen des Stillstands des Kraftfahrzeuges empfängt.According to the invention, the automatic transmission is operated with a shift-by-wire system which has a control unit which receives electrical signals from a standstill detection device for determining the standstill of the motor vehicle.
Insbesondere können elektrische Signale von der Antriebsstrangfehlerdetektionseinrichtung empfangen werden und elektrische Signale an die Einrichtung zum automatischen Einstellen eines Getriebeleerlaufs und/oder an die Notfahrfestlegungseinrichtung gesendet werden. Optional können weitere elektrische Signale mit anderen Einrichtungen ausgetauscht werden, wie der Einrichtung zur Diagnose des Automatikgetriebes, der Anzeigeeinrichtung, dem Verbrennungsmotor, und der E-Maschine.In particular, electrical signals can be received by the drive train fault detection device and electrical signals can be sent to the device for automatically setting a transmission idle and / or to the emergency driving setting device. Optionally, further electrical signals can be exchanged with other devices, such as the device for diagnosing the automatic transmission, the display device, the internal combustion engine, and the electric machine.
In einer Ausführungsform der Erfindung wird das Kraftfahrzeug mittels des Verbrennungsmotors über das Automatikgetriebe über die Hinterachse oder die Vorderachse des Kraftfahrzeuges angetrieben. Die jeweils andere Achse, die Vorderachse oder die Hinterachse wird mittels der E-Maschine angetrieben. Für den vorstehend beschriebenen Fall, dass ein Fehler im Antriebsstrang detektiert wird und die E-Maschine beispielsweise die Vorderachse antreibt wird dadurch erreicht, dass der Verbrennungsmotor nicht wie bei bekannten Systemen bei einem Notlauf über das Automatikgetriebe mit der Hinterachse verbunden wird. Dies könnte zu einem ungewollten abrupten Abbremsen an der Hinterachse führen, während die E-Maschine die Vorderachse des Kraftfahrzeuges antreibt. In einer solchen Situation wird erfindungsgemäß der Kraftschluss zwischen dem Verbrennungsmotor und dem Automatikgetriebe bzw. der Antriebsachse aufgehoben bzw. erst gar nicht bereitgestellt.In one embodiment of the invention, the motor vehicle is driven by means of the internal combustion engine via the automatic transmission via the rear axle or the front axle of the motor vehicle. The other axle, the front axle or the rear axle, is driven by the electric machine. For the above-described case that a fault in the drive train is detected and the electric machine drives the front axle, for example, the internal combustion engine is not connected to the rear axle via the automatic transmission via the automatic transmission, as is the case with known systems. This could lead to undesired, abrupt braking on the rear axle while the electric machine is driving the front axle of the motor vehicle. In such a situation, according to the invention, the frictional connection between the internal combustion engine and the automatic transmission or the drive axle is canceled or not provided at all.
Die vorliegende Erfindung hat den Vorteil, dass der beschriebene Zielkonflikt bei einem auftretenden Fehler im Antriebsstrang, insbesondere bei einem temporären Getriebefehler oder einem temporären Motorfehler sicher vermieden wird. Zunächst kann bei einem auftretenden Fehler das Kraftfahrzeug sicher mit Hilfe der E-Maschine weiter angetrieben werden. Der Fahrer kann nach Auftreten des Signals, das einen Fehler anzeigt, das Kraftfahrzeug weiter nutzen und an einer sicheren Stelle, beispielsweise auf dem nächsten Parkplatz, anhalten. Grundsätzlich ist eine Weiterfahrt allein mit der E-Maschine möglich, wobei hier die Reichweite beschränkt sein kann und abhängig ist vom Ladezustand der Batterien. Mit der vorliegenden Erfindung kann der Fahrer nach dem Anhalten des Fahrzeugs den Verbrennungsmotor starten und abhängig von dem aufgetretenen Fehler zum Beispiel des Automatikgetriebes kann das Kraftfahrzeug im Notfahrbetrieb mit Hilfe des Verbrennungsmotors über eine größere Reichweite bis zur nächsten Werkstatt oder einem anderen Ziel gefahren werden. Gegebenenfalls kann das Kraftfahrzeug gleichzeitig mit Hilfe des Verbrennungsmotors und der E-Maschine angetrieben werden und eine größere Reichweite bereitgestellt werden.The present invention has the advantage that the described conflict of objectives is reliably avoided in the event of a fault occurring in the drive train, in particular in the case of a temporary transmission fault or a temporary motor fault. First of all, if a fault occurs, the motor vehicle can safely continue to be driven with the aid of the electric machine. After the signal that indicates an error occurs, the driver can continue to use the motor vehicle and stop at a safe place, for example in the next parking lot. In principle, it is possible to continue driving with the electric machine alone, although the range here may be limited and depends on the state of charge of the batteries. With the present invention, the driver can start the internal combustion engine after stopping the vehicle and depending on the error that has occurred, for example in the automatic transmission, the motor vehicle can be driven in emergency mode with the aid of the internal combustion engine over a greater range to the nearest workshop or another destination. If necessary, the motor vehicle can be driven simultaneously with the aid of the internal combustion engine and the electric machine and a greater range can be provided.
Die vorliegende Erfindung ermöglicht somit eine automatisierte Initialisierung auf neutral bei Auftreten eines FuSi-Fehlers (Funktionssicherheit-Fehler) bei einem Fahrzeug mit einem Shift-by-wire System. Im Fehlerfall wird dies dem Fahrer angezeigt, der nach dem Anhalten des Fahrzeugs durch Betätigen des Wählhebels den Verbrennungsmotor starten kann und nach Maßgabe des zur Verfügung stehenden Notfahrbetriebs ohne weitere Funktionseinschränkungen weiterfahren kann. Andernfalls würde das System in der Fahrstellung „D“ fahren, und eine Rückfilterung des Fehlers wäre für das System erst möglich, wenn der Fahrer manuell in die Stellung „N“ schaltet oder den Motor abstellt und wieder startet.The present invention thus enables an automated initialization to neutral when a FuSi error (functional safety error) occurs in a vehicle with a shift-by-wire system. In the event of a fault, this is indicated to the driver who, after stopping the vehicle, can start the internal combustion engine by operating the selector lever and continue to drive without further functional restrictions in accordance with the available emergency driving mode. Otherwise the system would run in driving position "D" and the system would only be able to filter back the fault if the driver manually shifts to position "N" or switches off the engine and starts again.
Die Erfindung wird nachstehend anhand eines Beispiels und der Figur näher erläutert.The invention is explained in more detail below using an example and the figure.
Die einzige Figur zeigt ein schematisches Blockschaltbild einer Ausführungsform der Erfindung.The single figure shows a schematic block diagram of an embodiment of the invention.
In der Figur ist schematisch ein Kraftfahrzeug
Weiterhin weist die in der Figur schematisch dargestellte Ausführungsform eine Stillstandserkennungseinrichtung
Eine Notfahrfestlegungseinrichtung
In diesem Ausführungsbeispiel weist die Notfahrfestlegungseinrichtung
Weiterhin weist die Getriebefehlerdetektionseinrichtung
In dieser Ausführungsform weist das Fahrzeug ein Shift-by-wire System mit einem Steuergerät
Am Beispiel der in der Figur dargestellten schematischen Ausführungsform der Erfindung wird im Folgenden das Verfahren zum Bereitstellen eines Notfahrbetriebs beschrieben. Wenn das Kraftfahrzeug allein durch die E-Maschine angetrieben wird und die Getriebefehlerdetektionseinrichtung
Erst nachdem die Stillstandserkennungseinrichtung den Stillstand des Kraftfahrzeuges festgestellt hat und die Notfahrfestlegungseinrichtung
Die Notfahrfestlegungseinrichtung
Das Steuergerät
Die erfindungsgemäße Vorrichtung und das erfindungsgemäße Verfahren haben den Vorteil, dass das Fahrzeug sicher weiterbetrieben werden kann nachdem ein Getriebefehler erkannt wird. Abhängig von den zur Verfügung stehenden Notfahreigenschaften des Automatikgetriebes kann das Kraftfahrzeug mit dem Verbrennungsmotor angetrieben werden, wobei alternativ oder zusätzlich die Weiterfahrt auch über die E-Maschine möglich ist. Dabei kann wie in dem Ausführungsbeispiel gezeigt der Verbrennungsmotor mit der Hinterachse verbunden sein und die E-Maschine mit der Vorderachse oder umgekehrt.The device according to the invention and the method according to the invention have the advantage that the vehicle can continue to be operated safely after a transmission fault is detected. Depending on the emergency driving properties of the automatic transmission that are available, the motor vehicle can be driven with the internal combustion engine, alternatively or additionally it is also possible to continue driving via the electric machine. As shown in the exemplary embodiment, the internal combustion engine can be connected to the rear axle and the electric machine to the front axle or vice versa.
Claims (7)
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